CVE-2022-2255: mod_wsgi/mod_wsgi.c at 4.9.2 · GrahamDumpleton/mod_wsgi

/* ------------------------------------------------------------------------- */ /* * Copyright 2007-2022 GRAHAM DUMPLETON * * Licensed under the Apache License, Version 2.0 (the “License”); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an “AS IS” BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /* ------------------------------------------------------------------------- */ #include “wsgi_apache.h” #include “wsgi_python.h” #ifdef HAVE_SYS_PRCTL_H #include <sys/prctl.h> #endif #ifndef WIN32 #include <pwd.h> #endif static PyTypeObject Auth_Type; #if AP_SERVER_MINORVERSION_NUMBER >= 2 #define MOD_WSGI_WITH_AUTHN_PROVIDER 1 #endif #if AP_MODULE_MAGIC_AT_LEAST(20060110,0) #define MOD_WSGI_WITH_AUTHZ_PROVIDER 1 #if AP_MODULE_MAGIC_AT_LEAST(20100919,0) #define MOD_WSGI_WITH_AUTHZ_PROVIDER_PARSED 1 #endif #endif #if defined(MOD_WSGI_WITH_AUTHN_PROVIDER) #include “mod_auth.h” #include “ap_provider.h” #ifndef AUTHN_PROVIDER_VERSION #define AUTHN_PROVIDER_VERSION “0” #endif #endif /* Local project header files. */ #include “wsgi_version.h” #include “wsgi_convert.h” #include “wsgi_validate.h” #include “wsgi_interp.h” #include “wsgi_server.h” #include “wsgi_logger.h” #include “wsgi_restrict.h” #include “wsgi_stream.h” #include “wsgi_metrics.h” #include “wsgi_daemon.h” #include “wsgi_buckets.h” #include “wsgi_thread.h” /* Module information. */ module AP_MODULE_DECLARE_DATA wsgi_module; /* Process information. */ static int wsgi_multiprocess = 1; static int wsgi_multithread = 1; /* Daemon information. */ static apr_array_header_t *wsgi_daemon_list = NULL; static apr_pool_t *wsgi_parent_pool = NULL; int volatile wsgi_daemon_shutdown = 0; static int volatile wsgi_daemon_graceful = 0; static int wsgi_dump_stack_traces = 0; static char *wsgi_shutdown_reason = ""; #if defined(MOD_WSGI_WITH_DAEMONS) static apr_interval_time_t wsgi_startup_timeout = 0; static apr_interval_time_t wsgi_deadlock_timeout = 0; static apr_interval_time_t wsgi_idle_timeout = 0; static apr_interval_time_t wsgi_request_timeout = 0; static apr_interval_time_t wsgi_graceful_timeout = 0; static apr_interval_time_t wsgi_eviction_timeout = 0; static apr_interval_time_t wsgi_restart_interval = 0; static apr_time_t volatile wsgi_startup_shutdown_time = 0; static apr_time_t volatile wsgi_deadlock_shutdown_time = 0; static apr_time_t volatile wsgi_idle_shutdown_time = 0; static apr_time_t volatile wsgi_graceful_shutdown_time = 0; static apr_time_t volatile wsgi_restart_shutdown_time = 0; #endif /* Script information. */ static apr_array_header_t *wsgi_import_list = NULL; static void *wsgi_create_server_config(apr_pool_t *p, server_rec *s) { WSGIServerConfig *config = NULL; config = newWSGIServerConfig§; return config; } static void *wsgi_merge_server_config(apr_pool_t *p, void *base_conf, void *new_conf) { WSGIServerConfig *config = NULL; WSGIServerConfig *parent = NULL; WSGIServerConfig *child = NULL; config = newWSGIServerConfig§; parent = (WSGIServerConfig *)base_conf; child = (WSGIServerConfig *)new_conf; if (child->alias_list && parent->alias_list) { config->alias_list = apr_array_append(p, child->alias_list, parent->alias_list); } else if (child->alias_list) { config->alias_list = apr_array_make(p, 20, sizeof(WSGIAliasEntry)); apr_array_cat(config->alias_list, child->alias_list); } else if (parent->alias_list) { config->alias_list = apr_array_make(p, 20, sizeof(WSGIAliasEntry)); apr_array_cat(config->alias_list, parent->alias_list); } if (child->restrict_process) config->restrict_process = child->restrict_process; else config->restrict_process = parent->restrict_process; if (child->process_group) config->process_group = child->process_group; else config->process_group = parent->process_group; if (child->application_group) config->application_group = child->application_group; else config->application_group = parent->application_group; if (child->callable_object) config->callable_object = child->callable_object; else config->callable_object = parent->callable_object; if (child->dispatch_script) config->dispatch_script = child->dispatch_script; else config->dispatch_script = parent->dispatch_script; if (child->pass_apache_request != -1) config->pass_apache_request = child->pass_apache_request; else config->pass_apache_request = parent->pass_apache_request; if (child->pass_authorization != -1) config->pass_authorization = child->pass_authorization; else config->pass_authorization = parent->pass_authorization; if (child->script_reloading != -1) config->script_reloading = child->script_reloading; else config->script_reloading = parent->script_reloading; if (child->error_override != -1) config->error_override = child->error_override; else config->error_override = parent->error_override; if (child->chunked_request != -1) config->chunked_request = child->chunked_request; else config->chunked_request = parent->chunked_request; if (child->map_head_to_get != -1) config->map_head_to_get = child->map_head_to_get; else config->map_head_to_get = parent->map_head_to_get; if (child->ignore_activity != -1) config->ignore_activity = child->ignore_activity; else config->ignore_activity = parent->ignore_activity; if (child->trusted_proxy_headers) config->trusted_proxy_headers = child->trusted_proxy_headers; else config->trusted_proxy_headers = parent->trusted_proxy_headers; if (child->trusted_proxies) config->trusted_proxies = child->trusted_proxies; else config->trusted_proxies = parent->trusted_proxies; if (child->enable_sendfile != -1) config->enable_sendfile = child->enable_sendfile; else config->enable_sendfile = parent->enable_sendfile; if (!child->handler_scripts) config->handler_scripts = parent->handler_scripts; else if (!parent->handler_scripts) config->handler_scripts = child->handler_scripts; else { config->handler_scripts = apr_hash_overlay(p, child->handler_scripts, parent->handler_scripts); } return config; } typedef struct { apr_pool_t *pool; apr_table_t *restrict_process; const char *process_group; const char *application_group; const char *callable_object; WSGIScriptFile *dispatch_script; int pass_apache_request; int pass_authorization; int script_reloading; int error_override; int chunked_request; int map_head_to_get; int ignore_activity; apr_array_header_t *trusted_proxy_headers; apr_array_header_t *trusted_proxies; int enable_sendfile; WSGIScriptFile *access_script; WSGIScriptFile *auth_user_script; WSGIScriptFile *auth_group_script; int user_authoritative; int group_authoritative; apr_hash_t *handler_scripts; } WSGIDirectoryConfig; static WSGIDirectoryConfig *newWSGIDirectoryConfig(apr_pool_t *p) { WSGIDirectoryConfig *object = NULL; object = (WSGIDirectoryConfig *)apr_pcalloc(p, sizeof(WSGIDirectoryConfig)); object->pool = p; object->process_group = NULL; object->application_group = NULL; object->callable_object = NULL; object->dispatch_script = NULL; object->pass_apache_request = -1; object->pass_authorization = -1; object->script_reloading = -1; object->error_override = -1; object->chunked_request = -1; object->map_head_to_get = -1; object->ignore_activity = -1; object->trusted_proxy_headers = NULL; object->trusted_proxies = NULL; object->enable_sendfile = -1; object->access_script = NULL; object->auth_user_script = NULL; object->auth_group_script = NULL; object->user_authoritative = -1; object->group_authoritative = -1; return object; } static void *wsgi_create_dir_config(apr_pool_t *p, char *dir) { WSGIDirectoryConfig *config = NULL; config = newWSGIDirectoryConfig§; return config; } static void *wsgi_merge_dir_config(apr_pool_t *p, void *base_conf, void *new_conf) { WSGIDirectoryConfig *config = NULL; WSGIDirectoryConfig *parent = NULL; WSGIDirectoryConfig *child = NULL; config = newWSGIDirectoryConfig§; parent = (WSGIDirectoryConfig *)base_conf; child = (WSGIDirectoryConfig *)new_conf; if (child->restrict_process) config->restrict_process = child->restrict_process; else config->restrict_process = parent->restrict_process; if (child->process_group) config->process_group = child->process_group; else config->process_group = parent->process_group; if (child->application_group) config->application_group = child->application_group; else config->application_group = parent->application_group; if (child->callable_object) config->callable_object = child->callable_object; else config->callable_object = parent->callable_object; if (child->dispatch_script) config->dispatch_script = child->dispatch_script; else config->dispatch_script = parent->dispatch_script; if (child->pass_apache_request != -1) config->pass_apache_request = child->pass_apache_request; else config->pass_apache_request = parent->pass_apache_request; if (child->pass_authorization != -1) config->pass_authorization = child->pass_authorization; else config->pass_authorization = parent->pass_authorization; if (child->script_reloading != -1) config->script_reloading = child->script_reloading; else config->script_reloading = parent->script_reloading; if (child->error_override != -1) config->error_override = child->error_override; else config->error_override = parent->error_override; if (child->chunked_request != -1) config->chunked_request = child->chunked_request; else config->chunked_request = parent->chunked_request; if (child->map_head_to_get != -1) config->map_head_to_get = child->map_head_to_get; else config->map_head_to_get = parent->map_head_to_get; if (child->ignore_activity != -1) config->ignore_activity = child->ignore_activity; else config->ignore_activity = parent->ignore_activity; if (child->trusted_proxy_headers) config->trusted_proxy_headers = child->trusted_proxy_headers; else config->trusted_proxy_headers = parent->trusted_proxy_headers; if (child->trusted_proxies) config->trusted_proxies = child->trusted_proxies; else config->trusted_proxies = parent->trusted_proxies; if (child->enable_sendfile != -1) config->enable_sendfile = child->enable_sendfile; else config->enable_sendfile = parent->enable_sendfile; if (child->access_script) config->access_script = child->access_script; else config->access_script = parent->access_script; if (child->auth_user_script) config->auth_user_script = child->auth_user_script; else config->auth_user_script = parent->auth_user_script; if (child->auth_group_script) config->auth_group_script = child->auth_group_script; else config->auth_group_script = parent->auth_group_script; if (child->user_authoritative != -1) config->user_authoritative = child->user_authoritative; else config->user_authoritative = parent->user_authoritative; if (child->group_authoritative != -1) config->group_authoritative = child->group_authoritative; else config->group_authoritative = parent->group_authoritative; if (!child->handler_scripts) config->handler_scripts = parent->handler_scripts; else if (!parent->handler_scripts) config->handler_scripts = child->handler_scripts; else { config->handler_scripts = apr_hash_overlay(p, child->handler_scripts, parent->handler_scripts); } return config; } typedef struct { apr_pool_t *pool; apr_table_t *restrict_process; const char *process_group; const char *application_group; const char *callable_object; WSGIScriptFile *dispatch_script; int pass_apache_request; int pass_authorization; int script_reloading; int error_override; int chunked_request; int map_head_to_get; int ignore_activity; apr_array_header_t *trusted_proxy_headers; apr_array_header_t *trusted_proxies; int enable_sendfile; WSGIScriptFile *access_script; WSGIScriptFile *auth_user_script; WSGIScriptFile *auth_group_script; int user_authoritative; int group_authoritative; apr_hash_t *handler_scripts; const char *handler_script; int daemon_connects; int daemon_restarts; apr_time_t request_start; apr_time_t queue_start; apr_time_t daemon_start; } WSGIRequestConfig; static long wsgi_find_path_info(const char *uri, const char *path_info) { long lu = strlen(uri); long lp = strlen(path_info); while (lu-- && lp-- && uri[lu] == path_info[lp]) { if (path_info[lp] == ‘/’) { while (lu && uri[lu-1] == ‘/’) lu–; } } if (lu == -1) { lu = 0; } while (uri[lu] != ‘\0’ && uri[lu] != ‘/’) { lu++; } return lu; } static const char *wsgi_script_name(request_rec *r) { char *script_name = NULL; long path_info_start = 0; if (!r->path_info || !*r->path_info) { script_name = apr_pstrdup(r->pool, r->uri); } else { path_info_start = wsgi_find_path_info(r->uri, r->path_info); script_name = apr_pstrndup(r->pool, r->uri, path_info_start); } if (*script_name) { while (*script_name && (*(script_name+1) == ‘/’)) script_name++; script_name = apr_pstrdup(r->pool, script_name); ap_no2slash((char*)script_name); } ap_str_tolower(script_name); return script_name; } static const char *wsgi_process_group(request_rec *r, const char *s) { const char *name = NULL; const char *value = NULL; const char *h = NULL; apr_port_t p = 0; const char *n = NULL; if (!s) return ""; if (*s != ‘%’) return s; name = s + 1; if (*name) { if (!strcmp(name, “{GLOBAL}”)) return ""; if (!strcmp(name, “{RESOURCE}”)) { h = r->server->server_hostname; p = ap_get_server_port®; n = wsgi_script_name®; if (p != DEFAULT_HTTP_PORT && p != DEFAULT_HTTPS_PORT) return apr_psprintf(r->pool, "%s:%u|%s", h, p, n); else return apr_psprintf(r->pool, "%s|%s", h, n); } if (!strcmp(name, “{SERVER}”)) { h = r->server->server_hostname; p = ap_get_server_port®; if (p != DEFAULT_HTTP_PORT && p != DEFAULT_HTTPS_PORT) return apr_psprintf(r->pool, "%s:%u", h, p); else return h; } if (!strcmp(name, “{HOST}”)) { h = r->hostname; p = ap_get_server_port®; /* * The Host header could be empty or absent for HTTP/1.0 * or older. In that case fallback to ServerName. */ if (h == NULL || *h == 0) h = r->server->server_hostname; if (p != DEFAULT_HTTP_PORT && p != DEFAULT_HTTPS_PORT) return apr_psprintf(r->pool, "%s:%u", h, p); else return h; } if (strstr(name, “{ENV:”) == name) { long len = 0; name = name + 5; len = strlen(name); if (len && name[len-1] == ‘}’) { name = apr_pstrndup(r->pool, name, len-1); value = apr_table_get(r->notes, name); if (!value) value = apr_table_get(r->subprocess_env, name); if (!value) value = getenv(name); if (value) { if (*value == ‘%’ && strstr(value, “%{ENV:”) != value) return wsgi_process_group(r, value); return value; } } } } return s; } static const char *wsgi_server_group(request_rec *r, const char *s) { const char *name = NULL; const char *h = NULL; apr_port_t p = 0; if (!s) return ""; if (*s != ‘%’) return s; name = s + 1; if (*name) { if (!strcmp(name, “{GLOBAL}”)) return ""; if (!strcmp(name, “{SERVER}”)) { h = r->server->server_hostname; p = ap_get_server_port®; if (p != DEFAULT_HTTP_PORT && p != DEFAULT_HTTPS_PORT) return apr_psprintf(r->pool, "%s:%u", h, p); else return h; } if (!strcmp(name, “{HOST}”)) { h = r->hostname; p = ap_get_server_port®; /* * The Host header could be empty or absent for HTTP/1.0 * or older. In that case fallback to ServerName. */ if (h == NULL || *h == 0) h = r->server->server_hostname; if (p != DEFAULT_HTTP_PORT && p != DEFAULT_HTTPS_PORT) return apr_psprintf(r->pool, "%s:%u", h, p); else return h; } } return s; } static const char *wsgi_application_group(request_rec *r, const char *s) { const char *name = NULL; const char *value = NULL; const char *h = NULL; apr_port_t p = 0; const char *n = NULL; if (!s) { h = r->server->server_hostname; p = ap_get_server_port®; n = wsgi_script_name®; if (p != DEFAULT_HTTP_PORT && p != DEFAULT_HTTPS_PORT) return apr_psprintf(r->pool, "%s:%u|%s", h, p, n); else return apr_psprintf(r->pool, "%s|%s", h, n); } if (*s != ‘%’) return s; name = s + 1; if (*name) { if (!strcmp(name, “{GLOBAL}”)) return ""; if (!strcmp(name, “{RESOURCE}”)) { h = r->server->server_hostname; p = ap_get_server_port®; n = wsgi_script_name®; if (p != DEFAULT_HTTP_PORT && p != DEFAULT_HTTPS_PORT) return apr_psprintf(r->pool, "%s:%u|%s", h, p, n); else return apr_psprintf(r->pool, "%s|%s", h, n); } if (!strcmp(name, “{SERVER}”)) { h = r->server->server_hostname; p = ap_get_server_port®; if (p != DEFAULT_HTTP_PORT && p != DEFAULT_HTTPS_PORT) return apr_psprintf(r->pool, "%s:%u", h, p); else return h; } if (!strcmp(name, “{HOST}”)) { h = r->hostname; p = ap_get_server_port®; /* * The Host header could be empty or absent for HTTP/1.0 * or older. In that case fallback to ServerName. */ if (h == NULL || *h == 0) h = r->server->server_hostname; if (p != DEFAULT_HTTP_PORT && p != DEFAULT_HTTPS_PORT) return apr_psprintf(r->pool, "%s:%u", h, p); else return h; } if (strstr(name, “{ENV:”) == name) { long len = 0; name = name + 5; len = strlen(name); if (len && name[len-1] == ‘}’) { name = apr_pstrndup(r->pool, name, len-1); value = apr_table_get(r->notes, name); if (!value) value = apr_table_get(r->subprocess_env, name); if (!value) value = getenv(name); if (value) { if (*value == ‘%’ && strstr(value, “%{ENV:”) != value) return wsgi_application_group(r, value); return value; } } } } return s; } static const char *wsgi_callable_object(request_rec *r, const char *s) { const char *name = NULL; const char *value = NULL; if (!s) return "application"; if (*s != ‘%’) return s; name = s + 1; if (!*name) return "application"; if (strstr(name, “{ENV:”) == name) { long len = 0; name = name + 5; len = strlen(name); if (len && name[len-1] == ‘}’) { name = apr_pstrndup(r->pool, name, len-1); value = apr_table_get(r->notes, name); if (!value) value = apr_table_get(r->subprocess_env, name); if (!value) value = getenv(name); if (value) return value; } } return "application"; } static WSGIRequestConfig *wsgi_create_req_config(apr_pool_t *p, request_rec *r) { WSGIRequestConfig *config = NULL; WSGIServerConfig *sconfig = NULL; WSGIDirectoryConfig *dconfig = NULL; config = (WSGIRequestConfig *)apr_pcalloc(p, sizeof(WSGIRequestConfig)); dconfig = ap_get_module_config(r->per_dir_config, &wsgi_module); sconfig = ap_get_module_config(r->server->module_config, &wsgi_module); config->pool = p; config->restrict_process = dconfig->restrict_process; if (!config->restrict_process) config->restrict_process = sconfig->restrict_process; config->process_group = dconfig->process_group; if (!config->process_group) config->process_group = sconfig->process_group; config->process_group = wsgi_process_group(r, config->process_group); config->application_group = dconfig->application_group; if (!config->application_group) config->application_group = sconfig->application_group; config->application_group = wsgi_application_group(r, config->application_group); config->callable_object = dconfig->callable_object; if (!config->callable_object) config->callable_object = sconfig->callable_object; config->callable_object = wsgi_callable_object(r, config->callable_object); config->dispatch_script = dconfig->dispatch_script; if (!config->dispatch_script) config->dispatch_script = sconfig->dispatch_script; config->pass_apache_request = dconfig->pass_apache_request; if (config->pass_apache_request < 0) { config->pass_apache_request = sconfig->pass_apache_request; if (config->pass_apache_request < 0) config->pass_apache_request = 0; } config->pass_authorization = dconfig->pass_authorization; if (config->pass_authorization < 0) { config->pass_authorization = sconfig->pass_authorization; if (config->pass_authorization < 0) config->pass_authorization = 0; } config->script_reloading = dconfig->script_reloading; if (config->script_reloading < 0) { config->script_reloading = sconfig->script_reloading; if (config->script_reloading < 0) config->script_reloading = 1; } config->error_override = dconfig->error_override; if (config->error_override < 0) { config->error_override = sconfig->error_override; if (config->error_override < 0) config->error_override = 0; } config->chunked_request = dconfig->chunked_request; if (config->chunked_request < 0) { config->chunked_request = sconfig->chunked_request; if (config->chunked_request < 0) config->chunked_request = 0; } config->map_head_to_get = dconfig->map_head_to_get; if (config->map_head_to_get < 0) { config->map_head_to_get = sconfig->map_head_to_get; if (config->map_head_to_get < 0) config->map_head_to_get = 2; } config->ignore_activity = dconfig->ignore_activity; if (config->ignore_activity < 0) { config->ignore_activity = sconfig->ignore_activity; if (config->ignore_activity < 0) config->ignore_activity = 0; } config->trusted_proxy_headers = dconfig->trusted_proxy_headers; if (!config->trusted_proxy_headers) config->trusted_proxy_headers = sconfig->trusted_proxy_headers; config->trusted_proxies = dconfig->trusted_proxies; if (!config->trusted_proxies) config->trusted_proxies = sconfig->trusted_proxies; config->enable_sendfile = dconfig->enable_sendfile; if (config->enable_sendfile < 0) { config->enable_sendfile = sconfig->enable_sendfile; if (config->enable_sendfile < 0) config->enable_sendfile = 0; } config->access_script = dconfig->access_script; config->auth_user_script = dconfig->auth_user_script; config->auth_group_script = dconfig->auth_group_script; config->user_authoritative = dconfig->user_authoritative; if (config->user_authoritative == -1) config->user_authoritative = 1; config->group_authoritative = dconfig->group_authoritative; if (config->group_authoritative == -1) config->group_authoritative = 1; if (!dconfig->handler_scripts) config->handler_scripts = sconfig->handler_scripts; else if (!sconfig->handler_scripts) config->handler_scripts = dconfig->handler_scripts; else { config->handler_scripts = apr_hash_overlay(p, dconfig->handler_scripts, sconfig->handler_scripts); } config->handler_script = ""; config->daemon_connects = 0; config->daemon_restarts = 0; config->request_start = 0; config->queue_start = 0; config->daemon_start = 0; return config; } /* Error reporting. */ static void wsgi_log_script_error(request_rec *r, const char *e, const char *n) { char *message = NULL; if (!n) n = r->filename; message = apr_psprintf(r->pool, "%s: %s", e, n); ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "%s", message); } /* Class objects used by response handler. */ static PyTypeObject Dispatch_Type; typedef struct { PyObject_HEAD request_rec *r; int init; int done; char *buffer; apr_off_t size; apr_off_t offset; apr_off_t length; apr_bucket_brigade *bb; int seen_eos; int seen_error; apr_off_t bytes; apr_off_t reads; apr_time_t time; int ignore_activity; } InputObject; static PyTypeObject Input_Type; static InputObject *newInputObject(request_rec *r, int ignore_activity) { InputObject *self; self = PyObject_New(InputObject, &Input_Type); if (self == NULL) return NULL; self->r = r; self->init = 0; self->done = 0; self->buffer = NULL; self->size = 0; self->offset = 0; self->length = 0; self->bb = NULL; self->seen_eos = 0; self->seen_error = 0; self->bytes = 0; self->reads = 0; self->time = 0; self->ignore_activity = ignore_activity; return self; } static void Input_dealloc(InputObject *self) { if (self->buffer) free(self->buffer); PyObject_Del(self); } static void Input_finish(InputObject *self) { if (self->bb) { Py_BEGIN_ALLOW_THREADS apr_brigade_destroy(self->bb); Py_END_ALLOW_THREADS self->bb = NULL; } self->r = NULL; } static PyObject *Input_close(InputObject *self, PyObject *args) { if (!self->r) { PyErr_SetString(PyExc_RuntimeError, “request object has expired”); return NULL; } Py_INCREF(Py_None); return Py_None; } static apr_status_t wsgi_strtoff(apr_off_t *offset, const char *nptr, char **endptr, int base) { errno = 0; if (sizeof(apr_off_t) == 4) { *offset = strtol(nptr, endptr, base); } else { *offset = apr_strtoi64(nptr, endptr, base); } return APR_FROM_OS_ERROR(errno); } static apr_int64_t Input_read_from_input(InputObject *self, char *buffer, apr_size_t bufsiz) { request_rec *r = self->r; apr_bucket_brigade *bb = self->bb; apr_status_t rv; apr_status_t error_status = 0; const char *error_message = NULL; apr_time_t start = 0; apr_time_t finish = 0; /* If have already seen end of input, return an empty string. */ if (self->seen_eos) return 0; /* If have already encountered an error, then raise a new error. */ if (self->seen_error) { PyErr_SetString(PyExc_IOError, "Apache/mod_wsgi request data read " “error: Input is already in error state.”); return -1; } /* * When reaading the request content we will be saying that we * should block if there is no input data available at that * point but not all data has been exhausted. We therefore need * to ensure that we do not cause Python as a whole to block by * releasing the GIL, but also must remember to reacquire the GIL * when we exit. */ Py_BEGIN_ALLOW_THREADS start = apr_time_now(); self->reads += 1; /* * Create the bucket brigade the first time it is required and * save it against the input object. We need to make sure we * perform a cleanup, but not destroy, the bucket brigade each * time we exit this function. */ if (!bb) { bb = apr_brigade_create(r->pool, r->connection->bucket_alloc); if (bb == NULL) { r->connection->keepalive = AP_CONN_CLOSE; error_message = "Unable to create bucket brigade"; goto finally; } self->bb = bb; } /* Force the required amount of input to be read. */ rv = ap_get_brigade(r->input_filters, bb, AP_MODE_READBYTES, APR_BLOCK_READ, bufsiz); if (rv != APR_SUCCESS) { /* * If we actually fail here, we want to just return and * stop trying to read data from the client. The HTTP_IN * input filter is a bit of a pain here as it can return * EAGAIN in various strange situations where it isn’t * believed that it means to retry, but that it is still * a permanent failure. This can include timeouts and * errors in chunked encoding format. To avoid a message * of ‘Resource temporarily unavailable’ which could be * confusing, replace it with a generic message that the * connection was terminated. */ r->connection->keepalive = AP_CONN_CLOSE; if (APR_STATUS_IS_EAGAIN(rv)) error_message = "Connection was terminated"; else error_status = rv; goto finally; } /* * If this fails, it means that a filter is written incorrectly and * that it needs to learn how to properly handle APR_BLOCK_READ * requests by returning data when requested. */ AP_DEBUG_ASSERT(!APR_BRIGADE_EMPTY(bb)); /* * Check to see if EOS terminates the brigade. If so, we remember * this to avoid any attempts to read more data in future calls. */ if (APR_BUCKET_IS_EOS(APR_BRIGADE_LAST(bb))) self->seen_eos = 1; /* Now extract the actual data from the bucket brigade. */ rv = apr_brigade_flatten(bb, buffer, &bufsiz); if (rv != APR_SUCCESS) { error_status = rv; goto finally; } finally: /* * We must always cleanup up, not destroy, the brigade after * each call. */ if (bb) apr_brigade_cleanup(bb); finish = apr_time_now(); if (finish > start) self->time += (finish - start); /* Make sure we reacquire the GIL when all done. */ Py_END_ALLOW_THREADS /* * Set any Python exception when an error has occurred and * remember there was an error so can flag on subsequent * reads that already in an error state. */ if (error_status) { char status_buffer[512]; error_message = apr_psprintf(r->pool, "Apache/mod_wsgi request " "data read error: %s.", apr_strerror(error_status, status_buffer, sizeof(status_buffer)-1)); PyErr_SetString(PyExc_IOError, error_message); self->seen_error = 1; return -1; } else if (error_message) { error_message = apr_psprintf(r->pool, "Apache/mod_wsgi request " "data read error: %s.", error_message); PyErr_SetString(PyExc_IOError, error_message); self->seen_error = 1; return -1; } /* * Finally return the amount of data that was read. This will be * zero if all data has been consumed. */ return bufsiz; } static PyObject *Input_read(InputObject *self, PyObject *args) { #if defined(HAVE_LONG_LONG) PY_LONG_LONG size = -1; #else long size = -1; #endif PyObject *result = NULL; char *buffer = NULL; apr_off_t length = 0; int init = 0; apr_int64_t n; if (!self->r) { PyErr_SetString(PyExc_RuntimeError, “request object has expired”); return NULL; } #if defined(HAVE_LONG_LONG) if (!PyArg_ParseTuple(args, "|L:read", &size)) return NULL; #else if (!PyArg_ParseTuple(args, "|l:read", &size)) return NULL; #endif #if defined(MOD_WSGI_WITH_DAEMONS) if (wsgi_idle_timeout && !self->ignore_activity) { apr_thread_mutex_lock(wsgi_monitor_lock); if (wsgi_idle_timeout) { wsgi_idle_shutdown_time = apr_time_now(); wsgi_idle_shutdown_time += wsgi_idle_timeout; } apr_thread_mutex_unlock(wsgi_monitor_lock); } #endif if (self->seen_error) { PyErr_SetString(PyExc_IOError, "Apache/mod_wsgi request data read " “error: Input is already in error state.”); return NULL; } init = self->init; if (!self->init) self->init = 1; /* No point continuing if no more data to be consumed. */ if (self->done && self->length == 0) return PyString_FromString(“”); /* * If requested size is zero bytes, then still need to pass * this through to Apache input filters so that any * 100-continue response is triggered. Only do this if very * first attempt to read data. Note that this will cause an * assertion failure in HTTP_IN input filter when Apache * maintainer mode is enabled. It is arguable that the * assertion check, which prohibits a zero length read, * shouldn’t exist, as why should a zero length read be not * allowed if input filter processing still works when it * does occur. */ if (size == 0) { if (!init) { char dummy[1]; n = Input_read_from_input(self, dummy, 0); if (n == -1) return NULL; } return PyString_FromString(“”); } /* * First deal with case where size has been specified. After * that deal with case where expected that all remaining * data is to be read in and returned as one string. */ if (size > 0) { /* Allocate string of the exact size required. */ result = PyString_FromStringAndSize(NULL, size); if (!result) return NULL; buffer = PyString_AS_STRING((PyStringObject *)result); /* Copy any residual data from use of readline(). */ if (self->buffer && self->length) { if (size >= self->length) { length = self->length; memcpy(buffer, self->buffer + self->offset, length); self->offset = 0; self->length = 0; } else { length = size; memcpy(buffer, self->buffer + self->offset, length); self->offset += length; self->length -= length; } } /* If all data residual buffer consumed then free it. */ if (!self->length) { free(self->buffer); self->buffer = NULL; } /* Read in remaining data required to achieve size. */ if (length < size) { while (length != size) { n = Input_read_from_input(self, buffer+length, size-length); if (n == -1) { Py_DECREF(result); return NULL; } else if (n == 0) { /* Have exhausted all the available input data. */ self->done = 1; break; } length += n; } /* * Resize the final string. If the size reduction is * by more than 25% of the string size, then Python * will allocate a new block of memory and copy the * data into it. */ if (length != size) { if (_PyString_Resize(&result, length)) return NULL; } } } else { /* * Here we are going to try and read in all the * remaining data. First we have to allocate a suitably * large string, but we can’t fully trust the amount * that the request structure says is remaining based on * the original content length though, as an input * filter can insert/remove data from the input stream * thereby invalidating the original content length. * What we do is allow for an extra 25% above what we * have already buffered and what the request structure * says is remaining. A value of 25% has been chosen so * as to match best how Python handles resizing of * strings. Note that even though we do this and allow * all available content, strictly speaking the WSGI * specification says we should only read up until content * length. This though is because the WSGI specification * is deficient in dealing with the concept of mutating * input filters. Since read() with no argument is also * not allowed by WSGI specification implement it in the * way which is most logical and ensure that input data * is not truncated. */ if (self->buffer) { size = self->length; size = size + (size >> 2); if (size < HUGE_STRING_LEN) size = HUGE_STRING_LEN; } else size = HUGE_STRING_LEN; /* Allocate string of the estimated size. */ result = PyString_FromStringAndSize(NULL, size); if (!result) return NULL; buffer = PyString_AS_STRING((PyStringObject *)result); /* * Copy any residual data from use of readline(). The * residual should always be less in size than the * string we have allocated to hold it, so can consume * all of it. */ if (self->buffer && self->length) { length = self->length; memcpy(buffer, self->buffer + self->offset, length); self->offset = 0; self->length = 0; free(self->buffer); self->buffer = NULL; } /* Now make first attempt at reading remaining data. */ n = Input_read_from_input(self, buffer+length, size-length); if (n == -1) { Py_DECREF(result); return NULL; } else if (n == 0) { /* Have exhausted all the available input data. */ self->done = 1; } length += n; /* * Don’t just assume that all data has been read if * amount read was less than that requested. Still must * perform a read which returns that no more data found. */ while (!self->done) { if (length == size) { /* Increase the size of the string by 25%. */ size = size + (size >> 2); if (_PyString_Resize(&result, size)) return NULL; buffer = PyString_AS_STRING((PyStringObject *)result); } /* Now make succesive attempt at reading data. */ n = Input_read_from_input(self, buffer+length, size-length); if (n == -1) { Py_DECREF(result); return NULL; } else if (n == 0) { /* Have exhausted all the available input data. */ self->done = 1; } length += n; } /* * Resize the final string. If the size reduction is by * more than 25% of the string size, then Python will * allocate a new block of memory and copy the data into * it. */ if (length != size) { if (_PyString_Resize(&result, length)) return NULL; } } self->bytes += length; return result; } static PyObject *Input_readline(InputObject *self, PyObject *args) { #if defined(HAVE_LONG_LONG) PY_LONG_LONG size = -1; #else long size = -1; #endif PyObject *result = NULL; char *buffer = NULL; apr_off_t length = 0; apr_int64_t n; if (!self->r) { PyErr_SetString(PyExc_RuntimeError, “request object has expired”); return NULL; } #if defined(HAVE_LONG_LONG) if (!PyArg_ParseTuple(args, "|L:readline", &size)) return NULL; #else if (!PyArg_ParseTuple(args, "|l:readline", &size)) return NULL; #endif if (self->seen_error) { PyErr_SetString(PyExc_IOError, "Apache/mod_wsgi request data read " “error: Input is already in error state.”); return NULL; } if (!self->init) self->init = 1; /* * No point continuing if requested size is zero or if no * more data to read and no buffered data. */ if ((self->done && self->length == 0) || size == 0) return PyString_FromString(“”); /* * First deal with case where size has been specified. After * that deal with case where expected that a complete line * is returned regardless of the size. */ if (size > 0) { /* Allocate string of the exact size required. */ result = PyString_FromStringAndSize(NULL, size); if (!result) return NULL; buffer = PyString_AS_STRING((PyStringObject *)result); /* Copy any residual data from use of readline(). */ if (self->buffer && self->length) { char *p = NULL; const char *q = NULL; p = buffer; q = self->buffer + self->offset; while (self->length && length < size) { self->offset++; self->length–; length++; if ((*p++ = *q++) == ‘\n’) break; } /* If all data in residual buffer consumed then free it. */ if (!self->length) { free(self->buffer); self->buffer = NULL; } } /* * Read in remaining data required to achieve size. Note * that can’t just return whatever the first read might * have returned if no EOL encountered as must return * exactly the required size if no EOL unless that would * have exhausted all input. */ while ((!length || buffer[length-1] != ‘\n’) && !self->done && length < size) { char *p = NULL; char *q = NULL; n = Input_read_from_input(self, buffer+length, size-length); if (n == -1) { Py_DECREF(result); return NULL; } else if (n == 0) { /* Have exhausted all the available input data. */ self->done = 1; } else { /* * Search for embedded EOL in what was read and if * found copy any residual into a buffer for use * next time the read functions are called. */ p = buffer + length; q = p + n; while (p != q) { length++; if (*p++ == ‘\n’) break; } if (p != q) { self->size = q - p; self->buffer = (char *)malloc(self->size); self->offset = 0; self->length = self->size; memcpy(self->buffer, p, self->size); } } } /* * Resize the final string. If the size reduction is * by more than 25% of the string size, then Python * will allocate a new block of memory and copy the * data into it. */ if (length != size) { if (_PyString_Resize(&result, length)) return NULL; } } else { /* * Here we have to read in a line but where we have no * idea how long it may be. What we can do first is if * we have any residual data from a previous read * operation, see if it contains an EOL. This means we * have to do a search, but this is likely going to be * better than having to resize and copy memory later on. */ if (self->buffer && self->length) { const char *p = NULL; const char *q = NULL; p = self->buffer + self->offset; q = memchr(p, ‘\n’, self->length); if (q) size = q - p; } /* * If residual data buffer didn’t contain an EOL, all we * can do is allocate a reasonably sized string and if * that isn’t big enough keep increasing it in size. For * this we will start out with a buffer 25% greater in * size than what is stored in the residual data buffer * or one the same size as Apache string size, whichever * is greater. */ if (self->buffer && size < 0) { size = self->length; size = size + (size >> 2); } if (size < HUGE_STRING_LEN) size = HUGE_STRING_LEN; /* Allocate string of the initial size. */ result = PyString_FromStringAndSize(NULL, size); if (!result) return NULL; buffer = PyString_AS_STRING((PyStringObject *)result); /* Copy any residual data from use of readline(). */ if (self->buffer && self->length) { char *p = NULL; const char *q = NULL; p = buffer; q = self->buffer + self->offset; while (self->length && length < size) { self->offset++; self->length–; length++; if ((*p++ = *q++) == ‘\n’) break; } /* If all data in residual buffer consumed then free it. */ if (!self->length) { free(self->buffer); self->buffer = NULL; } } /* * Read in remaining data until find an EOL, or until all * data has been consumed. */ while ((!length || buffer[length-1] != ‘\n’) && !self->done) { char *p = NULL; char *q = NULL; n = Input_read_from_input(self, buffer+length, size-length); if (n == -1) { Py_DECREF(result); return NULL; } else if (n == 0) { /* Have exhausted all the available input data. */ self->done = 1; } else { /* * Search for embedded EOL in what was read and if * found copy any residual into a buffer for use * next time the read functions are called. */ p = buffer + length; q = p + n; while (p != q) { length++; if (*p++ == ‘\n’) break; } if (p != q) { self->size = q - p; self->buffer = (char *)malloc(self->size); self->offset = 0; self->length = self->size; memcpy(self->buffer, p, self->size); } if (buffer[length-1] != ‘\n’ && length == size) { /* Increase size of string and keep going. */ size = size + (size >> 2); if (_PyString_Resize(&result, size)) return NULL; buffer = PyString_AS_STRING((PyStringObject *)result); } } } /* * Resize the final string. If the size reduction is by * more than 25% of the string size, then Python will * allocate a new block of memory and copy the data into * it. */ if (length != size) { if (_PyString_Resize(&result, length)) return NULL; } } self->bytes += length; return result; } static PyObject *Input_readlines(InputObject *self, PyObject *args) { long hint = 0; long length = 0; PyObject *result = NULL; PyObject *line = NULL; PyObject *rlargs = NULL; if (!self->r) { PyErr_SetString(PyExc_RuntimeError, “request object has expired”); return NULL; } if (!PyArg_ParseTuple(args, "|l:readlines", &hint)) return NULL; result = PyList_New(0); if (!result) return NULL; rlargs = PyTuple_New(0); if (!rlargs) { Py_DECREF(result); return NULL; } while (1) { long n; if (!(line = Input_readline(self, rlargs))) { Py_DECREF(result); result = NULL; break; } if ((n = PyString_Size(line)) == 0) { Py_DECREF(line); break; } if (PyList_Append(result, line) == -1) { Py_DECREF(line); Py_DECREF(result); result = NULL; break; } Py_DECREF(line); length += n; if (hint > 0 && length >= hint) break; } Py_DECREF(rlargs); return result; } static PyMethodDef Input_methods[] = { { "close", (PyCFunction)Input_close, METH_NOARGS, 0 }, { "read", (PyCFunction)Input_read, METH_VARARGS, 0 }, { "readline", (PyCFunction)Input_readline, METH_VARARGS, 0 }, { "readlines", (PyCFunction)Input_readlines, METH_VARARGS, 0 }, { NULL, NULL} }; static PyObject *Input_iter(InputObject *self) { if (!self->r) { PyErr_SetString(PyExc_RuntimeError, “request object has expired”); return NULL; } Py_INCREF(self); return (PyObject *)self; } static PyObject *Input_iternext(InputObject *self) { PyObject *line = NULL; PyObject *rlargs = NULL; if (!self->r) { PyErr_SetString(PyExc_RuntimeError, “request object has expired”); return NULL; } rlargs = PyTuple_New(0); if (!rlargs) return NULL; line = Input_readline(self, rlargs); Py_DECREF(rlargs); if (!line) return NULL; if (PyString_GET_SIZE(line) == 0) { PyErr_SetObject(PyExc_StopIteration, Py_None); Py_DECREF(line); return NULL; } return line; } static PyTypeObject Input_Type = { PyVarObject_HEAD_INIT(NULL, 0) "mod_wsgi.Input", /*tp_name*/ sizeof(InputObject), /*tp_basicsize*/ 0, /*tp_itemsize*/ /* methods */ (destructor)Input_dealloc, /*tp_dealloc*/ 0, /*tp_print*/ 0, /*tp_getattr*/ 0, /*tp_setattr*/ 0, /*tp_compare*/ 0, /*tp_repr*/ 0, /*tp_as_number*/ 0, /*tp_as_sequence*/ 0, /*tp_as_mapping*/ 0, /*tp_hash*/ 0, /*tp_call*/ 0, /*tp_str*/ 0, /*tp_getattro*/ 0, /*tp_setattro*/ 0, /*tp_as_buffer*/ #if defined(Py_TPFLAGS_HAVE_ITER) Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_ITER, /*tp_flags*/ #else Py_TPFLAGS_DEFAULT, /*tp_flags*/ #endif 0, /*tp_doc*/ 0, /*tp_traverse*/ 0, /*tp_clear*/ 0, /*tp_richcompare*/ 0, /*tp_weaklistoffset*/ (getiterfunc)Input_iter, /*tp_iter*/ (iternextfunc)Input_iternext, /*tp_iternext*/ Input_methods, /*tp_methods*/ 0, /*tp_members*/ 0, /*tp_getset*/ 0, /*tp_base*/ 0, /*tp_dict*/ 0, /*tp_descr_get*/ 0, /*tp_descr_set*/ 0, /*tp_dictoffset*/ 0, /*tp_init*/ 0, /*tp_alloc*/ 0, /*tp_new*/ 0, /*tp_free*/ 0, /*tp_is_gc*/ }; typedef struct { PyObject_HEAD int result; request_rec *r; apr_bucket_brigade *bb; WSGIRequestConfig *config; InputObject *input; PyObject *log_buffer; PyObject *log; int status; const char *status_line; PyObject *headers; PyObject *sequence; int content_length_set; apr_off_t content_length; apr_off_t output_length; apr_off_t output_writes; apr_time_t output_time; apr_time_t start_time; } AdapterObject; static PyTypeObject Adapter_Type; static AdapterObject *newAdapterObject(request_rec *r) { AdapterObject *self; self = PyObject_New(AdapterObject, &Adapter_Type); if (self == NULL) return NULL; self->result = HTTP_INTERNAL_SERVER_ERROR; self->r = r; self->bb = NULL; self->config = (WSGIRequestConfig *)ap_get_module_config(r->request_config, &wsgi_module); self->status = HTTP_INTERNAL_SERVER_ERROR; self->status_line = NULL; self->headers = NULL; self->sequence = NULL; self->content_length_set = 0; self->content_length = 0; self->output_length = 0; self->output_writes = 0; self->output_time = 0; self->input = newInputObject(r, self->config->ignore_activity); self->log_buffer = newLogBufferObject(r, APLOG_ERR, "<wsgi.errors>", 0); self->log = newLogWrapperObject(self->log_buffer); return self; } static void Adapter_dealloc(AdapterObject *self) { Py_XDECREF(self->headers); Py_XDECREF(self->sequence); Py_DECREF(self->input); Py_DECREF(self->log_buffer); Py_DECREF(self->log); PyObject_Del(self); } static PyObject *Adapter_start_response(AdapterObject *self, PyObject *args) { PyObject *result = NULL; PyObject *status_line = NULL; PyObject *headers = NULL; PyObject *exc_info = Py_None; PyObject *status_line_as_bytes = NULL; PyObject *headers_as_bytes = NULL; if (!self->r) { PyErr_SetString(PyExc_RuntimeError, “request object has expired”); return NULL; } if (!PyArg_ParseTuple(args, "OO!|O:start_response", &status_line, &PyList_Type, &headers, &exc_info)) { return NULL; } if (exc_info != Py_None && !PyTuple_Check(exc_info)) { PyErr_SetString(PyExc_RuntimeError, “exception info must be a tuple”); return NULL; } if (exc_info != Py_None) { if (self->status_line && !self->headers) { PyObject *type = NULL; PyObject *value = NULL; PyObject *traceback = NULL; if (!PyArg_ParseTuple(exc_info, "OOO", &type, &value, &traceback)) { return NULL; } Py_INCREF(type); Py_INCREF(value); Py_INCREF(traceback); PyErr_Restore(type, value, traceback); return NULL; } } else if (self->status_line && !self->headers) { PyErr_SetString(PyExc_RuntimeError, “headers have already been sent”); return NULL; } /* Publish event for the start of the response. */ if (wsgi_event_subscribers()) { WSGIThreadInfo *thread_info; PyObject *event = NULL; PyObject *value = NULL; thread_info = wsgi_thread_info(0, 0); event = PyDict_New(); #if AP_MODULE_MAGIC_AT_LEAST(20100923,2) if (self->r->log_id) { #if PY_MAJOR_VERSION >= 3 value = PyUnicode_DecodeLatin1(self->r->log_id, strlen(self->r->log_id), NULL); #else value = PyString_FromString(self->r->log_id); #endif PyDict_SetItemString(event, "request_id", value); Py_DECREF(value); } #endif PyDict_SetItemString(event, "response_status", status_line); PyDict_SetItemString(event, "response_headers", headers); PyDict_SetItemString(event, "exception_info", exc_info); PyDict_SetItemString(event, "request_data", thread_info->request_data); wsgi_publish_event("response_started", event); Py_DECREF(event); } status_line_as_bytes = wsgi_convert_status_line_to_bytes(status_line); if (!status_line_as_bytes) goto finally; headers_as_bytes = wsgi_convert_headers_to_bytes(headers); if (!headers_as_bytes) goto finally; self->status_line = apr_pstrdup(self->r->pool, PyString_AsString( status_line_as_bytes)); self->status = (int)strtol(self->status_line, NULL, 10); Py_XDECREF(self->headers); self->headers = headers_as_bytes; Py_INCREF(headers_as_bytes); result = PyObject_GetAttrString((PyObject *)self, “write”); finally: Py_XDECREF(status_line_as_bytes); Py_XDECREF(headers_as_bytes); return result; } static int Adapter_output(AdapterObject *self, const char *data, apr_off_t length, PyObject *string_object, int exception_when_aborted) { int i = 0; apr_status_t rv; request_rec *r; apr_time_t output_start = 0; apr_time_t output_finish = 0; #if defined(MOD_WSGI_WITH_DAEMONS) if (wsgi_idle_timeout && !self->config->ignore_activity) { apr_thread_mutex_lock(wsgi_monitor_lock); if (wsgi_idle_timeout) { wsgi_idle_shutdown_time = apr_time_now(); wsgi_idle_shutdown_time += wsgi_idle_timeout; } apr_thread_mutex_unlock(wsgi_monitor_lock); } #endif if (!self->status_line) { PyErr_SetString(PyExc_RuntimeError, “response has not been started”); return 0; } r = self->r; /* Remember we started sending this block of output. */ output_start = apr_time_now(); /* Count how many separate blocks have been output. */ if (string_object) self->output_writes++; /* Have response headers yet been sent. */ if (self->headers) { /* * Apache prior to Apache 2.2.8 has a bug in it * whereby it doesn’t force ‘100 Continue’ * response before responding with headers if no * read. So, force a zero length read before * sending the headers if haven’t yet attempted * to read anything. This will ensure that if no * request content has been read that any ‘100 * Continue’ response will be flushed and sent * back to the client if client was expecting * one. Only want to do this for 2xx and 3xx * status values. Note that even though Apple * supplied version of Apache on MacOS X Leopard * is newer than version 2.2.8, the header file * has never been patched when they make updates * and so anything compiled against it thinks it * is older. */ #if (AP_SERVER_MAJORVERSION_NUMBER == 2 && \ AP_SERVER_MINORVERSION_NUMBER < 2) || \ (AP_SERVER_MAJORVERSION_NUMBER == 2 && \ AP_SERVER_MINORVERSION_NUMBER == 2 && \ AP_SERVER_PATCHLEVEL_NUMBER < 8) if (!self->input->init) { if (self->status >= 200 && self->status < 400) { PyObject *args = NULL; PyObject *result = NULL; args = Py_BuildValue("(i)", 0); result = Input_read(self->input, args); if (PyErr_Occurred()) PyErr_Clear(); Py_DECREF(args); Py_XDECREF(result); } } #endif /* * Now setup the response headers in request object. We * have already converted any native strings in the * headers to byte strings and validated the format of * the header names and values so can skip all the error * checking. */ r->status = self->status; r->status_line = self->status_line; for (i = 0; i < PyList_Size(self->headers); i++) { PyObject *tuple = NULL; PyObject *object1 = NULL; PyObject *object2 = NULL; char *name = NULL; char *value = NULL; tuple = PyList_GetItem(self->headers, i); object1 = PyTuple_GetItem(tuple, 0); object2 = PyTuple_GetItem(tuple, 1); name = PyBytes_AsString(object1); value = PyBytes_AsString(object2); if (!strcasecmp(name, “Content-Type”)) { /* * In a daemon child process we cannot call the * function ap_set_content_type() as want to * avoid adding any output filters based on the * type of file being served as this will be * done in the main Apache child process which * proxied the request to the daemon process. */ if (*self->config->process_group) r->content_type = apr_pstrdup(r->pool, value); else ap_set_content_type(r, apr_pstrdup(r->pool, value)); } else if (!strcasecmp(name, “Content-Length”)) { char *endstr; apr_off_t length; if (wsgi_strtoff(&length, value, &endstr, 10) || *endstr || length < 0) { PyErr_SetString(PyExc_ValueError, “invalid content length”); output_finish = apr_time_now(); if (output_finish > output_start) self->output_time += (output_finish - output_start); return 0; } ap_set_content_length(r, length); self->content_length_set = 1; self->content_length = length; } else if (!strcasecmp(name, “WWW-Authenticate”)) { apr_table_add(r->err_headers_out, name, value); } else { apr_table_add(r->headers_out, name, value); } } /* * Reset flag indicating whether ‘100 Continue’ response * expected. If we don’t do this then if an attempt to read * input for the first time is after headers have been * sent, then Apache is wrongly generate the ‘100 Continue’ * response into the response content. Not sure if this is * a bug in Apache, or that it truly believes that input * will never be read after the response headers have been * sent. */ r->expecting_100 = 0; /* No longer need headers now that they have been sent. */ Py_DECREF(self->headers); self->headers = NULL; } /* * If content length was specified, ensure that we don’t * actually output more data than was specified as being * sent as otherwise technically in violation of HTTP RFC. */ if (length) { apr_off_t output_length = length; if (self->content_length_set) { if (self->output_length < self->content_length) { if (self->output_length + length > self->content_length) { length = self->content_length - self->output_length; } } else length = 0; } self->output_length += output_length; } /* Now output any data. */ if (length) { apr_bucket *b; /* * When using Apache 2.X can use lower level * bucket brigade APIs. This is preferred as * ap_rwrite()/ap_rflush() will grow memory in * the request pool on each call, which will * result in an increase in memory use over time * when streaming of data is being performed. * The memory is still reclaimed, but only at * the end of the request. Using bucket brigade * API avoids this, and also avoids any copying * of response data due to buffering performed * by ap_rwrite(). */ if (r->connection->aborted) { if (!exception_when_aborted) { ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, self->r, "mod_wsgi (pid=%d): Client closed connection.", getpid()); } else PyErr_SetString(PyExc_IOError, "Apache/mod_wsgi client " “connection closed.”); output_finish = apr_time_now(); if (output_finish > output_start) self->output_time += (output_finish - output_start); return 0; } if (!self->bb) { self->bb = apr_brigade_create(r->pool, r->connection->bucket_alloc); } #if 0 if (string_object) { b = wsgi_apr_bucket_python_create(data, length, self->config->application_group, string_object, r->connection->bucket_alloc); } else { #endif b = apr_bucket_transient_create(data, (apr_size_t)length, r->connection->bucket_alloc); #if 0 } #endif APR_BRIGADE_INSERT_TAIL(self->bb, b); b = apr_bucket_flush_create(r->connection->bucket_alloc); APR_BRIGADE_INSERT_TAIL(self->bb, b); Py_BEGIN_ALLOW_THREADS rv = ap_pass_brigade(r->output_filters, self->bb); Py_END_ALLOW_THREADS if (rv != APR_SUCCESS) { char status_buffer[512]; const char *error_message; if (!exception_when_aborted) { error_message = apr_psprintf(r->pool, "Failed to write " "response data: %s", apr_strerror(rv, status_buffer, sizeof(status_buffer)-1)); ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, self->r, "mod_wsgi (pid=%d): %s.", getpid(), error_message); } else { error_message = apr_psprintf(r->pool, "Apache/mod_wsgi " "failed to write response data: %s", apr_strerror(rv, status_buffer, sizeof(status_buffer)-1)); PyErr_SetString(PyExc_IOError, error_message); } output_finish = apr_time_now(); if (output_finish > output_start) self->output_time += (output_finish - output_start); return 0; } Py_BEGIN_ALLOW_THREADS apr_brigade_cleanup(self->bb); Py_END_ALLOW_THREADS } /* Add how much time we spent send this block of output. */ output_finish = apr_time_now(); if (output_finish > output_start) self->output_time += (output_finish - output_start); /* * Check whether aborted connection was found when data * being written, otherwise will not be flagged until next * time that data is being written. Early detection is * better as it may have been the last data block being * written and application may think that data has all * been written. In a streaming application, we also want * to avoid any additional data processing to generate any * successive data. */ if (r->connection->aborted) { if (!exception_when_aborted) { ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, self->r, "mod_wsgi (pid=%d): Client closed connection.", getpid()); } else PyErr_SetString(PyExc_IOError, "Apache/mod_wsgi client " “connection closed.”); return 0; } return 1; } /* Split buckets at 1GB when sending large files. */ #define MAX_BUCKET_SIZE (0x40000000) static int Adapter_output_file(AdapterObject *self, apr_file_t* tmpfile, apr_off_t offset, apr_off_t len) { request_rec *r; apr_bucket *b; apr_status_t rv; apr_bucket_brigade *bb; apr_file_t* dupfile = NULL; r = self->r; if (r->connection->aborted) { PyErr_SetString(PyExc_IOError, "Apache/mod_wsgi client " “connection closed.”); return 0; } if (len == 0) return 1; bb = apr_brigade_create(r->pool, r->connection->bucket_alloc); apr_file_dup(&dupfile, tmpfile, r->pool); if (sizeof(apr_off_t) == sizeof(apr_size_t) || len < MAX_BUCKET_SIZE) { /* Can use a single bucket to send file. */ #if 0 b = apr_bucket_file_create(tmpfile, offset, (apr_size_t)len, r->pool, r->connection->bucket_alloc); #endif b = apr_bucket_file_create(dupfile, offset, (apr_size_t)len, r->pool, r->connection->bucket_alloc); } else { /* Need to create multiple buckets to send file. */ #if 0 b = apr_bucket_file_create(tmpfile, offset, MAX_BUCKET_SIZE, r->pool, r->connection->bucket_alloc); #endif b = apr_bucket_file_create(dupfile, offset, MAX_BUCKET_SIZE, r->pool, r->connection->bucket_alloc); while (len > MAX_BUCKET_SIZE) { apr_bucket *cb; apr_bucket_copy(b, &cb); APR_BRIGADE_INSERT_TAIL(bb, cb); b->start += MAX_BUCKET_SIZE; len -= MAX_BUCKET_SIZE; } /* Resize just the last bucket */ b->length = (apr_size_t)len; } APR_BRIGADE_INSERT_TAIL(bb, b); b = apr_bucket_flush_create(r->connection->bucket_alloc); APR_BRIGADE_INSERT_TAIL(bb, b); b = apr_bucket_eos_create(r->connection->bucket_alloc); APR_BRIGADE_INSERT_TAIL(bb, b); Py_BEGIN_ALLOW_THREADS rv = ap_pass_brigade(r->output_filters, bb); Py_END_ALLOW_THREADS if (rv != APR_SUCCESS) { char status_buffer[512]; const char *error_message; error_message = apr_psprintf(r->pool, "Apache/mod_wsgi failed " "to write response data: %s.", apr_strerror(rv, status_buffer, sizeof(status_buffer)-1)); PyErr_SetString(PyExc_IOError, error_message); return 0; } Py_BEGIN_ALLOW_THREADS apr_brigade_destroy(bb); Py_END_ALLOW_THREADS if (r->connection->aborted) { PyErr_SetString(PyExc_IOError, "Apache/mod_wsgi client connection " “closed.”); return 0; } return 1; } static APR_OPTIONAL_FN_TYPE(ssl_is_https) *wsgi_is_https = NULL; static PyObject *Adapter_environ(AdapterObject *self) { request_rec *r = NULL; PyObject *vars = NULL; PyObject *object = NULL; const apr_array_header_t *head = NULL; const apr_table_entry_t *elts = NULL; int i = 0; const char *scheme = NULL; /* Create the WSGI environment dictionary. */ vars = PyDict_New(); /* Merge the CGI environment into the WSGI environment. */ r = self->r; head = apr_table_elts(r->subprocess_env); elts = (apr_table_entry_t *)head->elts; for (i = 0; i < head->nelts; ++i) { if (elts[i].key) { if (elts[i].val) { #if PY_MAJOR_VERSION >= 3 if (!strcmp(elts[i].val, “DOCUMENT_ROOT”)) { object = PyUnicode_Decode(elts[i].val, strlen(elts[i].val), Py_FileSystemDefaultEncoding, “surrogateescape”); } else if (!strcmp(elts[i].val, “SCRIPT_FILENAME”)) { object = PyUnicode_Decode(elts[i].val, strlen(elts[i].val), Py_FileSystemDefaultEncoding, “surrogateescape”); } else { object = PyUnicode_DecodeLatin1(elts[i].val, strlen(elts[i].val), NULL); } #else object = PyString_FromString(elts[i].val); #endif PyDict_SetItemString(vars, elts[i].key, object); Py_DECREF(object); } else PyDict_SetItemString(vars, elts[i].key, Py_None); } } PyDict_DelItemString(vars, “PATH”); /* Now setup all the WSGI specific environment values. */ object = Py_BuildValue("(ii)", 1, 0); PyDict_SetItemString(vars, "wsgi.version", object); Py_DECREF(object); object = PyBool_FromLong(wsgi_multithread); PyDict_SetItemString(vars, "wsgi.multithread", object); Py_DECREF(object); object = PyBool_FromLong(wsgi_multiprocess); PyDict_SetItemString(vars, "wsgi.multiprocess", object); Py_DECREF(object); #if defined(MOD_WSGI_WITH_DAEMONS) if (wsgi_daemon_process) { if (wsgi_daemon_process->group->threads == 1 && wsgi_daemon_process->group->maximum_requests == 1) { PyDict_SetItemString(vars, "wsgi.run_once", Py_True); } else PyDict_SetItemString(vars, "wsgi.run_once", Py_False); } else PyDict_SetItemString(vars, "wsgi.run_once", Py_False); #else PyDict_SetItemString(vars, "wsgi.run_once", Py_False); #endif scheme = apr_table_get(r->subprocess_env, “HTTPS”); if (scheme && (!strcasecmp(scheme, “On”) || !strcmp(scheme, “1”))) { #if PY_MAJOR_VERSION >= 3 object = PyUnicode_FromString(“https”); #else object = PyString_FromString(“https”); #endif PyDict_SetItemString(vars, "wsgi.url_scheme", object); Py_DECREF(object); } else { #if PY_MAJOR_VERSION >= 3 object = PyUnicode_FromString(“http”); #else object = PyString_FromString(“http”); #endif PyDict_SetItemString(vars, "wsgi.url_scheme", object); Py_DECREF(object); } /* * We remove the HTTPS variable because WSGI compliant * applications shouldn’t rely on it. Instead they should * use wsgi.url_scheme. We do this even if SetEnv was * used to set HTTPS from Apache configuration. That is * we convert it into the correct variable and remove the * original. */ if (scheme) PyDict_DelItemString(vars, “HTTPS”); /* * Setup log object for WSGI errors. Don’t decrement * reference to log object as keep reference to it. */ object = (PyObject *)self->log; PyDict_SetItemString(vars, "wsgi.errors", object); /* Setup input object for request content. */ object = (PyObject *)self->input; PyDict_SetItemString(vars, "wsgi.input", object); PyDict_SetItemString(vars, "wsgi.input_terminated", Py_True); /* Setup file wrapper object for efficient file responses. */ PyDict_SetItemString(vars, "wsgi.file_wrapper", (PyObject *)&Stream_Type); /* Add Apache and mod_wsgi version information. */ object = Py_BuildValue("(iii)", AP_SERVER_MAJORVERSION_NUMBER, AP_SERVER_MINORVERSION_NUMBER, AP_SERVER_PATCHLEVEL_NUMBER); PyDict_SetItemString(vars, "apache.version", object); Py_DECREF(object); object = Py_BuildValue("(iii)", MOD_WSGI_MAJORVERSION_NUMBER, MOD_WSGI_MINORVERSION_NUMBER, MOD_WSGI_MICROVERSION_NUMBER); PyDict_SetItemString(vars, "mod_wsgi.version", object); Py_DECREF(object); /* * If Apache extensions are enabled and running in embedded * mode add a CObject reference to the Apache request_rec * structure instance. */ if (!wsgi_daemon_pool && self->config->pass_apache_request) { #if (PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >= 2) || \ (PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION >= 7) object = PyCapsule_New(self->r, 0, 0); #else object = PyCObject_FromVoidPtr(self->r, 0); #endif PyDict_SetItemString(vars, "apache.request_rec", object); Py_DECREF(object); } /* * Extensions for accessing SSL certificate information from * mod_ssl when in use. */ #if 0 if (!wsgi_daemon_pool) { object = PyObject_GetAttrString((PyObject *)self, “ssl_is_https”); PyDict_SetItemString(vars, "mod_ssl.is_https", object); Py_DECREF(object); object = PyObject_GetAttrString((PyObject *)self, “ssl_var_lookup”); PyDict_SetItemString(vars, "mod_ssl.var_lookup", object); Py_DECREF(object); } #endif return vars; } static int Adapter_process_file_wrapper(AdapterObject *self) { int done = 0; #ifndef WIN32 PyObject *filelike = NULL; PyObject *method = NULL; PyObject *object = NULL; apr_status_t rv = 0; apr_os_file_t fd = -1; apr_file_t *tmpfile = NULL; apr_finfo_t finfo; apr_off_t fd_offset = 0; apr_off_t fo_offset = 0; apr_off_t length = 0; /* Perform file wrapper optimisations where possible. */ if (!PyObject_IsInstance(self->sequence, (PyObject *)&Stream_Type)) return 0; /* * Only attempt to perform optimisations if the * write() function returned by start_response() * function has not been called with non zero length * data. In other words if no prior response content * generated. Technically it could be done, but want * to have a consistent rule about how specifying a * content length affects how much of a file is * sent. Don’t want to have to take into * consideration whether write() function has been * called or not as just complicates things. */ if (self->output_length != 0) return 0; /* * Work out if file wrapper is associated with a * file like object, where that file object is * associated with a regular file. If it does then * we can optimise how the contents of the file are * sent out. If no such associated file descriptor * then it needs to be processed like any other * iterable value. */ filelike = PyObject_GetAttrString((PyObject *)self->sequence, “filelike”); if (!filelike) { PyErr_SetString(PyExc_KeyError, “file wrapper no filelike attribute”); return 0; } fd = PyObject_AsFileDescriptor(filelike); if (fd == -1) { PyErr_Clear(); Py_DECREF(filelike); return 0; } Py_DECREF(filelike); /* * On some platforms, such as Linux, sendfile() system call * will not work on UNIX sockets. Thus when using daemon mode * cannot enable that feature. */ if (self->config->enable_sendfile) apr_os_file_put(&tmpfile, &fd, APR_SENDFILE_ENABLED, self->r->pool); else apr_os_file_put(&tmpfile, &fd, 0, self->r->pool); rv = apr_file_info_get(&finfo, APR_FINFO_SIZE|APR_FINFO_TYPE, tmpfile); if (rv != APR_SUCCESS || finfo.filetype != APR_REG) return 0; /* * Because Python file like objects potentially have * their own buffering layering, or use an operating * system FILE object which also has a buffering * layer on top of a normal file descriptor, need to * determine from the file like object its position * within the file and use that as starting position. * Note that it is assumed that user had flushed any * modifications to the file as necessary. Also, we * need to make sure we remember the original file * descriptor position as will need to restore that * position so it matches the upper buffering layers * when done. This is done to avoid any potential * problems if file like object does anything strange * in its close() method which relies on file position * being what it thought it should be. */ rv = apr_file_seek(tmpfile, APR_CUR, &fd_offset); if (rv != APR_SUCCESS) return 0; method = PyObject_GetAttrString(filelike, “tell”); if (!method) return 0; object = PyObject_CallObject(method, NULL); Py_DECREF(method); if (!object) { PyErr_Clear(); return 0; } if (PyLong_Check(object)) { #if defined(HAVE_LONG_LONG) fo_offset = PyLong_AsLongLong(object); #else fo_offset = PyLong_AsLong(object); #endif } #if PY_MAJOR_VERSION < 3 else if (PyInt_Check(object)) { fo_offset = PyInt_AsLong(object); } #endif else { Py_DECREF(object); return 0; } if (PyErr_Occurred()){ Py_DECREF(object); PyErr_Clear(); return 0; } Py_DECREF(object); /* * For a file wrapper object need to always ensure * that response headers are parsed. This is done so * that if the content length header has been * defined we can get its value and use it to limit * how much of a file is being sent. The WSGI 1.0 * specification says that we are meant to send all * available bytes from the file, however this is * questionable as sending more than content length * would violate HTTP RFC. Note that this doesn’t * actually flush the headers out when using Apache * 2.X. This is good, as we want to still be able to * set the content length header if none set and file * is seekable. If processing response headers fails, * then need to return as if done, with error being * logged later. */ if (!Adapter_output(self, "", 0, NULL, 0)) return 1; /* * If content length wasn’t defined then determine * the amount of data which is available to send and * set the content length response header. Either * way, if can work out length then send data * otherwise fall through and treat it as normal * iterable. */ if (!self->content_length_set) { length = finfo.size - fo_offset; self->output_length += length; ap_set_content_length(self->r, length); self->content_length_set = 1; self->content_length = length; if (Adapter_output_file(self, tmpfile, fo_offset, length)) self->result = OK; done = 1; } else { length = finfo.size - fo_offset; self->output_length += length; /* Use user specified content length instead. */ length = self->content_length; if (Adapter_output_file(self, tmpfile, fo_offset, length)) self->result = OK; done = 1; } /* * Restore position of underlying file descriptor. * If this fails, then not much we can do about it. */ apr_file_seek(tmpfile, APR_SET, &fd_offset); #endif return done; } static int Adapter_run(AdapterObject *self, PyObject *object) { PyObject *vars = NULL; PyObject *start = NULL; PyObject *args = NULL; PyObject *iterator = NULL; PyObject *close = NULL; PyObject *nrwrapper = NULL; PyObject *evwrapper = NULL; PyObject *value = NULL; PyObject *event = NULL; const char *msg = NULL; apr_off_t length = 0; WSGIThreadInfo *thread_handle = NULL; apr_time_t finish_time; WSGIThreadCPUUsage start_usage; WSGIThreadCPUUsage end_usage; int aborted = 0; #if defined(MOD_WSGI_WITH_DAEMONS) if (wsgi_idle_timeout && !self->config->ignore_activity) { apr_thread_mutex_lock(wsgi_monitor_lock); if (wsgi_idle_timeout) { wsgi_idle_shutdown_time = apr_time_now(); wsgi_idle_shutdown_time += wsgi_idle_timeout; } apr_thread_mutex_unlock(wsgi_monitor_lock); } #endif if (wsgi_newrelic_config_file) { PyObject *module = NULL; module = PyImport_ImportModule(“newrelic.agent”); if (module) { PyObject *dict; PyObject *factory; dict = PyModule_GetDict(module); factory = PyDict_GetItemString(dict, “WSGIApplicationWrapper”); if (factory) { Py_INCREF(factory); nrwrapper = PyObject_CallFunctionObjArgs( factory, object, Py_None, NULL); if (!nrwrapper) { wsgi_log_python_error(self->r, self->log, self->r->filename, 0); PyErr_Clear(); } Py_DECREF(factory); } Py_DECREF(module); } } if (nrwrapper) object = nrwrapper; self->start_time = apr_time_now(); apr_table_setn(self->r->subprocess_env, "mod_wsgi.script_start", apr_psprintf(self->r->pool, “%” APR_TIME_T_FMT, self->start_time)); vars = Adapter_environ(self); value = wsgi_PyInt_FromLongLong(wsgi_total_requests); PyDict_SetItemString(vars, "mod_wsgi.total_requests", value); Py_DECREF(value); thread_handle = wsgi_thread_info(1, 1); value = wsgi_PyInt_FromLong(thread_handle->thread_id); PyDict_SetItemString(vars, "mod_wsgi.thread_id", value); Py_DECREF(value); value = wsgi_PyInt_FromLongLong(thread_handle->request_count); PyDict_SetItemString(vars, "mod_wsgi.thread_requests", value); Py_DECREF(value); /* Publish event for the start of the request. */ start_usage.user_time = 0.0; start_usage.system_time = 0.0; if (wsgi_event_subscribers()) { wsgi_thread_cpu_usage(&start_usage); event = PyDict_New(); #if AP_MODULE_MAGIC_AT_LEAST(20100923,2) if (self->r->log_id) { #if PY_MAJOR_VERSION >= 3 value = PyUnicode_DecodeLatin1(self->r->log_id, strlen(self->r->log_id), NULL); #else value = PyString_FromString(self->r->log_id); #endif PyDict_SetItemString(event, "request_id", value); Py_DECREF(value); } #endif value = wsgi_PyInt_FromLong(thread_handle->thread_id); PyDict_SetItemString(event, "thread_id", value); Py_DECREF(value); value = wsgi_PyInt_FromLong(self->config->daemon_connects); PyDict_SetItemString(event, "daemon_connects", value); Py_DECREF(value); value = wsgi_PyInt_FromLong(self->config->daemon_restarts); PyDict_SetItemString(event, "daemon_restarts", value); Py_DECREF(value); value = PyFloat_FromDouble(apr_time_sec( (double)self->config->request_start)); PyDict_SetItemString(event, "request_start", value); Py_DECREF(value); value = PyFloat_FromDouble(apr_time_sec( (double)self->config->queue_start)); PyDict_SetItemString(event, "queue_start", value); Py_DECREF(value); value = PyFloat_FromDouble(apr_time_sec( (double)self->config->daemon_start)); PyDict_SetItemString(event, "daemon_start", value); Py_DECREF(value); PyDict_SetItemString(event, "application_object", object); PyDict_SetItemString(event, "request_environ", vars); value = PyFloat_FromDouble(apr_time_sec((double)self->start_time)); PyDict_SetItemString(event, "application_start", value); Py_DECREF(value); PyDict_SetItemString(event, "request_data", thread_handle->request_data); wsgi_publish_event("request_started", event); evwrapper = PyDict_GetItemString(event, “application_object”); if (evwrapper) { if (evwrapper != object) { Py_INCREF(evwrapper); object = evwrapper; } else evwrapper = NULL; } Py_DECREF(event); } /* Pass the request through to the WSGI application. */ thread_handle->request_count++; start = PyObject_GetAttrString((PyObject *)self, “start_response”); args = Py_BuildValue("(OO)", vars, start); self->sequence = PyObject_CallObject(object, args); if (self->sequence != NULL) { if (!Adapter_process_file_wrapper(self)) { iterator = PyObject_GetIter(self->sequence); if (iterator != NULL) { PyObject *item = NULL; while ((item = PyIter_Next(iterator))) { if (!PyString_Check(item)) { PyErr_Format(PyExc_TypeError, "sequence of byte " "string values expected, value of " "type %.200s found", item->ob_type->tp_name); Py_DECREF(item); break; } msg = PyString_AsString(item); length = PyString_Size(item); if (!msg) { Py_DECREF(item); break; } if (length && !Adapter_output(self, msg, length, item, 0)) { if (!PyErr_Occurred()) aborted = 1; Py_DECREF(item); break; } Py_DECREF(item); } } if (!PyErr_Occurred()) { if (!aborted) { /* * In the case where the response was empty we * need to ensure we explicitly flush out the * headers. This is done by calling the output * routine but with an empty string as content. * This could be gated on whether any content * had already been sent, but easier to just call * it all the time. */ if (Adapter_output(self, "", 0, NULL, 0)) self->result = OK; } else { /* * If the client connection was already marked * as aborted, then it indicates the client has * closed the connection. In this case mark the * final result as okay rather than an error so * that the access log still records the original * HTTP response code for the request rather than * overriding it. If don’t do this then access * log will show 500 when the WSGI application * itself had run fine. */ self->result = OK; } } Py_XDECREF(iterator); } /* * Log warning if more response content generated than was * indicated, or less, if there was no errors generated by * the application and connection wasn’t aborted. */ if (self->content_length_set && ((!PyErr_Occurred() && !aborted && self->output_length != self->content_length) || (self->output_length > self->content_length))) { ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, self->r, "mod_wsgi (pid=%d): Content length mismatch, " "expected %s, response generated %s: %s", getpid(), apr_off_t_toa(self->r->pool, self->content_length), apr_off_t_toa(self->r->pool, self->output_length), self->r->filename); } if (PyErr_Occurred()) { /* * Response content has already been sent, so cannot * return an internal server error as Apache will * append its own error page. Thus need to return OK * and just truncate the response. */ if (self->status_line && !self->headers) self->result = OK; wsgi_log_python_error(self->r, self->log, self->r->filename, 1); /* * If response content is being chunked and an error * occurred, we need to prevent the sending of the EOS * bucket so a client is able to detect that the the * response was incomplete. */ if (self->r->chunked) self->r->eos_sent = 1; } if (PyObject_HasAttrString(self->sequence, “close”)) { PyObject *args = NULL; PyObject *data = NULL; close = PyObject_GetAttrString(self->sequence, “close”); args = Py_BuildValue("()"); data = PyObject_CallObject(close, args); Py_DECREF(args); Py_XDECREF(data); Py_DECREF(close); } if (PyErr_Occurred()) wsgi_log_python_error(self->r, self->log, self->r->filename, 1); } else wsgi_log_python_error(self->r, self->log, self->r->filename, 1); /* Publish event for the end of the request. */ finish_time = apr_time_now(); if (wsgi_event_subscribers()) { double application_time = 0.0; double output_time = 0.0; event = PyDict_New(); #if AP_MODULE_MAGIC_AT_LEAST(20100923,2) if (self->r->log_id) { #if PY_MAJOR_VERSION >= 3 value = PyUnicode_DecodeLatin1(self->r->log_id, strlen(self->r->log_id), NULL); #else value = PyString_FromString(self->r->log_id); #endif PyDict_SetItemString(event, "request_id", value); Py_DECREF(value); } #endif value = wsgi_PyInt_FromLongLong(self->input->reads); PyDict_SetItemString(event, "input_reads", value); Py_DECREF(value); value = wsgi_PyInt_FromLongLong(self->input->bytes); PyDict_SetItemString(event, "input_length", value); Py_DECREF(value); value = PyFloat_FromDouble(apr_time_sec((double)self->input->time)); PyDict_SetItemString(event, "input_time", value); Py_DECREF(value); value = wsgi_PyInt_FromLongLong(self->output_length); PyDict_SetItemString(event, "output_length", value); Py_DECREF(value); value = wsgi_PyInt_FromLongLong(self->output_writes); PyDict_SetItemString(event, "output_writes", value); Py_DECREF(value); output_time = apr_time_sec((double)self->output_time); if (output_time < 0.0) output_time = 0.0; application_time = apr_time_sec((double)finish_time-self->start_time); if (application_time < 0.0) application_time = 0.0; if (start_usage.user_time != 0.0) { if (wsgi_thread_cpu_usage(&end_usage)) { double user_seconds; double system_seconds; double total_seconds; user_seconds = end_usage.user_time; user_seconds -= start_usage.user_time; if (user_seconds < 0.0) user_seconds = 0.0; system_seconds = end_usage.system_time; system_seconds -= start_usage.system_time; if (system_seconds < 0.0) system_seconds = 0.0; total_seconds = user_seconds + system_seconds; if (total_seconds && total_seconds > application_time) { user_seconds = (user_seconds/total_seconds)*application_time; system_seconds = application_time - user_seconds; } value = PyFloat_FromDouble(user_seconds); PyDict_SetItemString(event, "cpu_user_time", value); Py_DECREF(value); value = PyFloat_FromDouble(system_seconds); PyDict_SetItemString(event, "cpu_system_time", value); Py_DECREF(value); } } value = PyFloat_FromDouble(output_time); PyDict_SetItemString(event, "output_time", value); Py_DECREF(value); value = PyFloat_FromDouble(apr_time_sec((double)finish_time)); PyDict_SetItemString(event, "application_finish", value); Py_DECREF(value); value = PyFloat_FromDouble(application_time); PyDict_SetItemString(event, "application_time", value); Py_DECREF(value); PyDict_SetItemString(event, "request_data", thread_handle->request_data); wsgi_publish_event("request_finished", event); Py_DECREF(event); } /* * Record server and application time for metrics. Values * are the time request first accepted by child workers, * the time that the WSGI application started processing * the request, and when the WSGI application finished the * request. */ wsgi_record_request_times(self->config->request_start, self->config->queue_start, self->config->daemon_start, self->start_time, finish_time); /* * If result indicates an internal server error, then * replace the status line in the request object else * that provided by the application will be what is used * in any error page automatically generated by Apache. */ if (self->result == HTTP_INTERNAL_SERVER_ERROR) self->r->status_line = "500 Internal Server Error"; Py_DECREF(args); Py_DECREF(start); Py_DECREF(vars); Py_XDECREF(nrwrapper); Py_XDECREF(evwrapper); Py_XDECREF(self->sequence); self->sequence = NULL; return self->result; } static PyObject *Adapter_write(AdapterObject *self, PyObject *args) { PyObject *item = NULL; const char *data = NULL; long length = 0; if (!self->r) { PyErr_SetString(PyExc_RuntimeError, “request object has expired”); return NULL; } if (!PyArg_ParseTuple(args, "O:write", &item)) return NULL; if (!PyString_Check(item)) { PyErr_Format(PyExc_TypeError, "byte string value expected, value " "of type %.200s found", item->ob_type->tp_name); return NULL; } data = PyString_AsString(item); length = PyString_Size(item); if (!Adapter_output(self, data, length, item, 1)) { return NULL; } Py_INCREF(Py_None); return Py_None; } static PyObject *Adapter_ssl_is_https(AdapterObject *self, PyObject *args) { APR_OPTIONAL_FN_TYPE(ssl_is_https) *ssl_is_https = 0; if (!self->r) { PyErr_SetString(PyExc_RuntimeError, “request object has expired”); return NULL; } if (!PyArg_ParseTuple(args, “:ssl_is_https”)) return NULL; ssl_is_https = APR_RETRIEVE_OPTIONAL_FN(ssl_is_https); if (ssl_is_https == 0) return Py_BuildValue("i", 0); return Py_BuildValue("i", ssl_is_https(self->r->connection)); } static PyObject *Adapter_ssl_var_lookup(AdapterObject *self, PyObject *args) { APR_OPTIONAL_FN_TYPE(ssl_var_lookup) *ssl_var_lookup = 0; PyObject *item = NULL; PyObject *latin_item = NULL; char *name = 0; char *value = 0; if (!self->r) { PyErr_SetString(PyExc_RuntimeError, “request object has expired”); return NULL; } if (!PyArg_ParseTuple(args, "O:ssl_var_lookup", &item)) return NULL; #if PY_MAJOR_VERSION >= 3 if (PyUnicode_Check(item)) { latin_item = PyUnicode_AsLatin1String(item); if (!latin_item) { PyErr_Format(PyExc_TypeError, "byte string value expected, " “value containing non ‘latin-1’ characters found”); return NULL; } item = latin_item; } #endif if (!PyString_Check(item)) { PyErr_Format(PyExc_TypeError, "byte string value expected, value " "of type %.200s found", item->ob_type->tp_name); Py_XDECREF(latin_item); return NULL; } name = PyString_AsString(item); ssl_var_lookup = APR_RETRIEVE_OPTIONAL_FN(ssl_var_lookup); if (ssl_var_lookup == 0) { Py_XDECREF(latin_item); Py_INCREF(Py_None); return Py_None; } value = ssl_var_lookup(self->r->pool, self->r->server, self->r->connection, self->r, name); Py_XDECREF(latin_item); if (!value) { Py_INCREF(Py_None); return Py_None; } #if PY_MAJOR_VERSION >= 3 return PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else return PyString_FromString(value); #endif } static PyMethodDef Adapter_methods[] = { { "start_response", (PyCFunction)Adapter_start_response, METH_VARARGS, 0 }, { "write", (PyCFunction)Adapter_write, METH_VARARGS, 0 }, { "ssl_is_https", (PyCFunction)Adapter_ssl_is_https, METH_VARARGS, 0 }, { "ssl_var_lookup", (PyCFunction)Adapter_ssl_var_lookup, METH_VARARGS, 0 }, { NULL, NULL} }; static PyTypeObject Adapter_Type = { PyVarObject_HEAD_INIT(NULL, 0) "mod_wsgi.Adapter", /*tp_name*/ sizeof(AdapterObject), /*tp_basicsize*/ 0, /*tp_itemsize*/ /* methods */ (destructor)Adapter_dealloc, /*tp_dealloc*/ 0, /*tp_print*/ 0, /*tp_getattr*/ 0, /*tp_setattr*/ 0, /*tp_compare*/ 0, /*tp_repr*/ 0, /*tp_as_number*/ 0, /*tp_as_sequence*/ 0, /*tp_as_mapping*/ 0, /*tp_hash*/ 0, /*tp_call*/ 0, /*tp_str*/ 0, /*tp_getattro*/ 0, /*tp_setattro*/ 0, /*tp_as_buffer*/ Py_TPFLAGS_DEFAULT, /*tp_flags*/ 0, /*tp_doc*/ 0, /*tp_traverse*/ 0, /*tp_clear*/ 0, /*tp_richcompare*/ 0, /*tp_weaklistoffset*/ 0, /*tp_iter*/ 0, /*tp_iternext*/ Adapter_methods, /*tp_methods*/ 0, /*tp_members*/ 0, /*tp_getset*/ 0, /*tp_base*/ 0, /*tp_dict*/ 0, /*tp_descr_get*/ 0, /*tp_descr_set*/ 0, /*tp_dictoffset*/ 0, /*tp_init*/ 0, /*tp_alloc*/ 0, /*tp_new*/ 0, /*tp_free*/ 0, /*tp_is_gc*/ }; /* * Code for importing a module from source by absolute path. */ static PyObject *wsgi_load_source(apr_pool_t *pool, request_rec *r, const char *name, int exists, const char* filename, const char *process_group, const char *application_group, int ignore_system_exit) { PyObject *m = NULL; PyObject *co = NULL; PyObject *io_module = NULL; PyObject *fileobject = NULL; PyObject *source_bytes_object = NULL; PyObject *result = NULL; char *source_buf = NULL; if (exists) { Py_BEGIN_ALLOW_THREADS if ® { ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, "mod_wsgi (pid=%d, process=’%s’, application=’%s’): " "Reloading WSGI script ‘%s’.", getpid(), process_group, application_group, filename); } else { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d, process=’%s’, application=’%s’): " "Reloading WSGI script ‘%s’.", getpid(), process_group, application_group, filename); } Py_END_ALLOW_THREADS } else { Py_BEGIN_ALLOW_THREADS if ® { ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, "mod_wsgi (pid=%d, process=’%s’, application=’%s’): " "Loading Python script file ‘%s’.", getpid(), process_group, application_group, filename); } else { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d, process=’%s’, application=’%s’): " "Loading Python script file ‘%s’.", getpid(), process_group, application_group, filename); } Py_END_ALLOW_THREADS } io_module = PyImport_ImportModule(“io”); if (!io_module) goto load_source_finally; fileobject = PyObject_CallMethod(io_module, "open", "ss", filename, “rb”); if (!fileobject) goto load_source_finally; source_bytes_object = PyObject_CallMethod(fileobject, "read", “”); if (!source_bytes_object) goto load_source_finally; result = PyObject_CallMethod(fileobject, "close", “”); if (!result) goto load_source_finally; source_buf = PyBytes_AsString(source_bytes_object); if (!source_buf) goto load_source_finally; co = Py_CompileString(source_buf, filename, Py_file_input); load_source_finally: if (!co) { Py_BEGIN_ALLOW_THREADS if ® { ap_log_rerror(APLOG_MARK, APLOG_ERR, errno, r, "mod_wsgi (pid=%d, process=’%s’, application=’%s’): " "Could not read/compile source file ‘%s’.", getpid(), process_group, application_group, filename); } else { ap_log_error(APLOG_MARK, APLOG_ERR, errno, wsgi_server, "mod_wsgi (pid=%d, process=’%s’, application=’%s’): " "Could not read/compile source file '%s’.", getpid(), process_group, application_group, filename); } Py_END_ALLOW_THREADS wsgi_log_python_error(r, NULL, filename, 0); Py_XDECREF(io_module); Py_XDECREF(fileobject); Py_XDECREF(source_bytes_object); Py_XDECREF(result); return NULL; } Py_XDECREF(io_module); Py_XDECREF(fileobject); Py_XDECREF(source_bytes_object); Py_XDECREF(result); m = PyImport_ExecCodeModuleEx((char *)name, co, (char *)filename); if (m) { PyObject *object = NULL; if (!r || strcmp(r->filename, filename)) { apr_finfo_t finfo; apr_status_t status; Py_BEGIN_ALLOW_THREADS status = apr_stat(&finfo, filename, APR_FINFO_NORM, pool); Py_END_ALLOW_THREADS if (status != APR_SUCCESS) object = PyLong_FromLongLong(0); else object = PyLong_FromLongLong(finfo.mtime); } else { object = PyLong_FromLongLong(r->finfo.mtime); } PyModule_AddObject(m, "__mtime__", object); } else { if (PyErr_ExceptionMatches(PyExc_SystemExit)) { if (!ignore_system_exit) { Py_BEGIN_ALLOW_THREADS if ® { ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): SystemExit exception " "raised when doing exec of Python script " "file '%s’.", getpid(), filename); } else { ap_log_error(APLOG_MARK, APLOG_ERR, 0, wsgi_server, "mod_wsgi (pid=%d): SystemExit exception " "raised when doing exec of Python script " "file '%s’.", getpid(), filename); } Py_END_ALLOW_THREADS } } else { Py_BEGIN_ALLOW_THREADS if ® { ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): Failed to exec Python script " "file '%s’.", getpid(), filename); } else { ap_log_error(APLOG_MARK, APLOG_ERR, 0, wsgi_server, "mod_wsgi (pid=%d): Failed to exec Python script " "file '%s’.", getpid(), filename); } Py_END_ALLOW_THREADS wsgi_log_python_error(r, NULL, filename, 0); } } Py_XDECREF(co); return m; } static int wsgi_reload_required(apr_pool_t *pool, request_rec *r, const char *filename, PyObject *module, const char *resource) { PyObject *dict = NULL; PyObject *object = NULL; apr_time_t mtime = 0; dict = PyModule_GetDict(module); object = PyDict_GetItemString(dict, “__mtime__”); if (object) { mtime = PyLong_AsLongLong(object); if (!r || strcmp(r->filename, filename)) { apr_finfo_t finfo; apr_status_t status; Py_BEGIN_ALLOW_THREADS status = apr_stat(&finfo, filename, APR_FINFO_NORM, pool); Py_END_ALLOW_THREADS if (status != APR_SUCCESS) return 1; else if (mtime != finfo.mtime) return 1; } else { if (mtime != r->finfo.mtime) return 1; } } else return 1; if (resource) { PyObject *dict = NULL; PyObject *object = NULL; dict = PyModule_GetDict(module); object = PyDict_GetItemString(dict, “reload_required”); if (object) { PyObject *args = NULL; PyObject *result = NULL; #if PY_MAJOR_VERSION >= 3 PyObject *path = NULL; #endif Py_INCREF(object); #if PY_MAJOR_VERSION >= 3 path = PyUnicode_Decode(resource, strlen(resource), Py_FileSystemDefaultEncoding, “surrogateescape”); args = Py_BuildValue("(O)", path); Py_DECREF(path); #else args = Py_BuildValue("(s)", resource); #endif result = PyObject_CallObject(object, args); Py_DECREF(args); Py_DECREF(object); if (result && PyObject_IsTrue(result)) { Py_DECREF(result); return 1; } if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, filename, 0); Py_XDECREF(result); } } return 0; } static char *wsgi_module_name(apr_pool_t *pool, const char *filename) { char *hash = NULL; char *file = NULL; /* * Calculate a name for the module using the MD5 of its full * pathname. This is so that different code files with the * same basename are still considered unique. Note that where * we believe a case insensitive file system is being used, * we always change the file name to lower case so that use * of different case in name doesn’t result in duplicate * modules being loaded for the same file. */ file = (char *)filename; if (wsgi_server_config->case_sensitivity) { file = apr_pstrdup(pool, file); ap_str_tolower(file); } hash = ap_md5(pool, (const unsigned char *)file); return apr_pstrcat(pool, "_mod_wsgi_", hash, NULL); } #if APR_HAS_THREADS static apr_thread_mutex_t* wsgi_module_lock = NULL; #endif static int wsgi_execute_script(request_rec *r) { WSGIRequestConfig *config = NULL; InterpreterObject *interp = NULL; PyObject *modules = NULL; PyObject *module = NULL; const char *script = NULL; const char *name = NULL; int exists = 0; int status; WSGIThreadInfo *thread_info = NULL; /* Grab request configuration. */ config = (WSGIRequestConfig *)ap_get_module_config(r->request_config, &wsgi_module); /* * Acquire the desired python interpreter. Once this is done * it is safe to start manipulating python objects. */ interp = wsgi_acquire_interpreter(config->application_group); if (!interp) { ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r, "mod_wsgi (pid=%d): Cannot acquire interpreter '%s’.", getpid(), config->application_group); return HTTP_INTERNAL_SERVER_ERROR; } /* Setup startup timeout if first request and specified. */ #if defined(MOD_WSGI_WITH_DAEMONS) if (wsgi_daemon_process) { if (wsgi_startup_shutdown_time == 0) { if (wsgi_startup_timeout > 0) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Application startup " "timer triggered '%s’.", getpid(), config->process_group); apr_thread_mutex_lock(wsgi_monitor_lock); wsgi_startup_shutdown_time = apr_time_now(); wsgi_startup_shutdown_time += wsgi_startup_timeout; apr_thread_mutex_unlock(wsgi_monitor_lock); } } } #endif /* * Use a lock around the check to see if the module is * already loaded and the import of the module to prevent * two request handlers trying to import the module at the * same time. */ #if APR_HAS_THREADS Py_BEGIN_ALLOW_THREADS apr_thread_mutex_lock(wsgi_module_lock); Py_END_ALLOW_THREADS #endif /* Calculate the Python module name to be used for script. */ if (config->handler_script && *config->handler_script) { script = config->handler_script; #if 0 /* * Check for whether a module reference is provided * as opposed to a filesystem path. */ if (strlen(script) > 2 && script[0] == '(' && script[strlen(script)-1] == ')') { name = apr_pstrndup(r->pool, script+1, strlen(script)-2); module = PyImport_ImportModule(name); if (!module) { Py_BEGIN_ALLOW_THREADS ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): Failed to import handler " "via Python module reference %s.", getpid(), script); Py_END_ALLOW_THREADS wsgi_log_python_error(r, NULL, r->filename, 0); } } #endif } else script = r->filename; if (!module) { name = wsgi_module_name(r->pool, script); modules = PyImport_GetModuleDict(); module = PyDict_GetItemString(modules, name); Py_XINCREF(module); if (module) exists = 1; /* * If script reloading is enabled and the module for it has * previously been loaded, see if it has been modified since * the last time it was accessed. For a handler script will * also see if it contains a custom function for determining * if a reload should be performed. */ if (module && config->script_reloading) { if (wsgi_reload_required(r->pool, r, script, module, r->filename)) { /* * Script file has changed. Discard reference to * loaded module and work out what action we are * supposed to take. Choices are process reloading * and module reloading. Process reloading cannot be * performed unless a daemon process is being used. */ Py_DECREF(module); module = NULL; #if defined(MOD_WSGI_WITH_DAEMONS) if (*config->process_group) { /* * Need to restart the daemon process. We bail * out on the request process here, sending back * a special response header indicating that * process is being restarted and that remote * end should abandon connection and attempt to * reconnect again. We also need to signal this * process so it will actually shutdown. The * process supervisor code will ensure that it * is restarted. */ Py_BEGIN_ALLOW_THREADS ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, "mod_wsgi (pid=%d): Force restart of " "process '%s’.", getpid(), config->process_group); Py_END_ALLOW_THREADS #if APR_HAS_THREADS apr_thread_mutex_unlock(wsgi_module_lock); #endif wsgi_release_interpreter(interp); r->status = HTTP_INTERNAL_SERVER_ERROR; r->status_line = "200 Rejected"; wsgi_daemon_shutdown++; kill(getpid(), SIGINT); return OK; } else { /* * Need to reload just the script module. Remove * the module from the modules dictionary before * reloading it again. If code is executing * within the module at the time, the callers * reference count on the module should ensure * it isn’t actually destroyed until it is * finished. */ PyDict_DelItemString(modules, name); } #else /* * Need to reload just the script module. Remove * the module from the modules dictionary before * reloading it again. If code is executing * within the module at the time, the callers * reference count on the module should ensure * it isn’t actually destroyed until it is * finished. */ PyDict_DelItemString(modules, name); #endif } } } /* * When process reloading is in use, or a queue timeout is * set, need to indicate that request content should now be * sent through. This is done by writing a special response * header directly out onto the appropriate network output * filter. The special response is picked up by remote end * and data will then be sent. */ #if defined(MOD_WSGI_WITH_DAEMONS) if (*config->process_group && (config->script_reloading || wsgi_daemon_process->group->queue_timeout != 0)) { ap_filter_t *filters; apr_bucket_brigade *bb; apr_bucket *b; const char *data = "Status: 200 Continue\r\n\r\n"; long length = strlen(data); Py_BEGIN_ALLOW_THREADS filters = r->output_filters; while (filters && filters->frec->ftype != AP_FTYPE_NETWORK) { filters = filters->next; } bb = apr_brigade_create(r->pool, r->connection->bucket_alloc); b = apr_bucket_transient_create(data, length, r->connection->bucket_alloc); APR_BRIGADE_INSERT_TAIL(bb, b); b = apr_bucket_flush_create(r->connection->bucket_alloc); APR_BRIGADE_INSERT_TAIL(bb, b); /* * This should always work, so ignore any errors * from passing the brigade to the network * output filter. If there are are problems they * will be picked up further down in processing * anyway. */ ap_pass_brigade(filters, bb); Py_END_ALLOW_THREADS } #endif /* Setup metrics for start of request. */ thread_info = wsgi_start_request®; /* Load module if not already loaded. */ if (!module) { module = wsgi_load_source(r->pool, r, name, exists, script, config->process_group, config->application_group, 0); } /* Safe now to release the module lock. */ #if APR_HAS_THREADS apr_thread_mutex_unlock(wsgi_module_lock); #endif /* * Clear startup timeout and prevent from running again if the * module was successfully loaded. */ #if defined(MOD_WSGI_WITH_DAEMONS) if (module && wsgi_startup_shutdown_time > 0) { wsgi_startup_shutdown_time = -1; ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Application startup " "timer cancelled ‘%s’.", getpid(), config->process_group); } #endif /* Assume an internal server error unless everything okay. */ status = HTTP_INTERNAL_SERVER_ERROR; /* Determine if script exists and execute it. */ if (module) { PyObject *module_dict = NULL; PyObject *object = NULL; module_dict = PyModule_GetDict(module); object = PyDict_GetItemString(module_dict, config->callable_object); if (object) { AdapterObject *adapter = NULL; adapter = newAdapterObject®; if (adapter) { PyObject *method = NULL; PyObject *args = NULL; Py_INCREF(adapter->log_buffer); thread_info->log_buffer = adapter->log_buffer; Py_INCREF(object); status = Adapter_run(adapter, object); Py_DECREF(object); /* * Wipe out references to Apache request object * held by Python objects, so can detect when an * application holds on to the transient Python * objects beyond the life of the request and * thus raise an exception if they are used. */ adapter->r = NULL; Input_finish(adapter->input); /* Close the log object so data is flushed. */ method = PyObject_GetAttrString(adapter->log, “close”); if (!method) { PyErr_Format(PyExc_AttributeError, "’%s’ object has no attribute 'close’", adapter->log->ob_type->tp_name); } else { args = PyTuple_New(0); object = PyObject_CallObject(method, args); Py_DECREF(args); } Py_XDECREF(object); Py_XDECREF(method); Py_CLEAR(thread_info->log_buffer); adapter->bb = NULL; } Py_XDECREF((PyObject *)adapter); } else { Py_BEGIN_ALLOW_THREADS ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): Target WSGI script ‘%s’ does " "not contain WSGI application '%s’.", getpid(), script, config->callable_object); Py_END_ALLOW_THREADS status = HTTP_NOT_FOUND; } } /* Log any details of exceptions if execution failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, r->filename, 0); Py_XDECREF(module); /* Finalise any metrics at end of the request. */ wsgi_end_request(); /* Cleanup and release interpreter, */ wsgi_release_interpreter(interp); return status; } /* * Apache child process initialisation and cleanup. Initialise * global table containing Python interpreter instances and * cache reference to main interpreter. Also register cleanup * function to delete interpreter on process shutdown. */ static apr_status_t wsgi_python_child_cleanup(void *data) { PyObject *interp = NULL; /* * If not a daemon process need to publish that process * is shutting down here. For daemon we did it earlier * before trying to wait on request threads. */ #if defined(MOD_WSGI_WITH_DAEMONS) if (!wsgi_daemon_process) wsgi_publish_process_stopping(wsgi_shutdown_reason); #else wsgi_publish_process_stopping(wsgi_shutdown_reason); #endif /* Skip destruction of Python interpreter. */ if (wsgi_server_config->destroy_interpreter == 0) return APR_SUCCESS; /* In a multithreaded MPM must protect table. */ #if APR_HAS_THREADS apr_thread_mutex_lock(wsgi_interp_lock); #endif /* * We should be executing in the main thread again at this * point but without the GIL, so simply restore the original * thread state for that thread that we remembered when we * initialised the interpreter. */ PyEval_AcquireThread(wsgi_main_tstate); /* * Extract a handle to the main Python interpreter from * interpreters dictionary as want to process that one last. */ interp = PyDict_GetItemString(wsgi_interpreters, “”); Py_INCREF(interp); /* * Remove all items from interpreters dictionary. This will * have side affect of calling any exit functions and * destroying interpreters we own. */ ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Destroying interpreters.", getpid()); PyDict_Clear(wsgi_interpreters); #if APR_HAS_THREADS apr_thread_mutex_unlock(wsgi_interp_lock); #endif /* * Now we decrement reference on handle for main Python * interpreter. This only causes exit functions to be called * and doesn’t result in interpreter being destroyed as we * we didn’t previously mark ourselves as the owner of the * interpreter. Note that when Python as a whole is later * being destroyed it will also call exit functions, but by * then the exit function registrations have been removed * and so they will not actually be run a second time. */ Py_DECREF(interp); /* * The code which performs actual shutdown of the main * interpreter expects to be called without the GIL, so * we release it here again. */ PyEval_ReleaseThread(wsgi_main_tstate); /* * Destroy Python itself including the main interpreter. * If mod_python is being loaded it is left to mod_python to * destroy Python, although it currently doesn’t do so. */ if (wsgi_python_initialized) wsgi_python_term(); return APR_SUCCESS; } static void wsgi_python_child_init(apr_pool_t *p) { PyGILState_STATE state; PyObject *object = NULL; int ignore_system_exit = 0; /* Working with Python, so must acquire GIL. */ state = PyGILState_Ensure(); /* * Trigger any special Python stuff required after a fork. * Only do this though if we were responsible for the * initialisation of the Python interpreter in the first * place to avoid it being done multiple times. Also only * do it if Python was initialised in parent process. */ #ifdef HAVE_FORK if (wsgi_python_initialized && !wsgi_python_after_fork) { #if PY_MAJOR_VERSION > 3 || (PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >= 7) PyOS_AfterFork_Child(); #else PyOS_AfterFork(); #endif } #endif /* Finalise any Python objects required by child process. */ PyType_Ready(&Log_Type); PyType_Ready(&Stream_Type); PyType_Ready(&Input_Type); PyType_Ready(&Adapter_Type); PyType_Ready(&Restricted_Type); PyType_Ready(&Interpreter_Type); PyType_Ready(&Dispatch_Type); PyType_Ready(&Auth_Type); PyType_Ready(&SignalIntercept_Type); #if PY_MAJOR_VERSION > 3 || (PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >= 4) PyType_Ready(&ShutdownInterpreter_Type); #endif /* Initialise Python interpreter instance table and lock. */ wsgi_interpreters = PyDict_New(); #if APR_HAS_THREADS apr_thread_mutex_create(&wsgi_interp_lock, APR_THREAD_MUTEX_UNNESTED, p); apr_thread_mutex_create(&wsgi_module_lock, APR_THREAD_MUTEX_UNNESTED, p); apr_thread_mutex_create(&wsgi_shutdown_lock, APR_THREAD_MUTEX_UNNESTED, p); #endif /* * Create an interpreters index using Apache data structure so * can iterate over interpreter names without needing Python GIL. */ wsgi_interpreters_index = apr_hash_make§; /* * Initialise the key for data related to a thread and force * creation of thread info. */ apr_threadkey_private_create(&wsgi_thread_key, NULL, p); wsgi_thread_info(1, 0); /* * Cache a reference to the first Python interpreter * instance. This interpreter is special as some third party * Python modules will only work when used from within this * interpreter. This is generally when they use the Python * simplified GIL API or otherwise don’t use threading API * properly. An empty string for name is used to identify * the first Python interpreter instance. */ object = (PyObject *)newInterpreterObject(NULL); PyDict_SetItemString(wsgi_interpreters, "", object); Py_DECREF(object); apr_hash_set(wsgi_interpreters_index, "", APR_HASH_KEY_STRING, “”); /* Restore the prior thread state and release the GIL. */ PyGILState_Release(state); /* Register cleanups to performed on process shutdown. */ apr_pool_cleanup_register(p, NULL, wsgi_python_child_cleanup, apr_pool_cleanup_null); /* Loop through import scripts for this process and load them. */ #if defined(MOD_WSGI_WITH_DAEMONS) if (wsgi_daemon_process && wsgi_daemon_process->group->threads == 0) ignore_system_exit = 1; #endif if (wsgi_import_list) { apr_array_header_t *scripts = NULL; WSGIScriptFile *entries; WSGIScriptFile *entry; int i; scripts = wsgi_import_list; entries = (WSGIScriptFile *)scripts->elts; for (i = 0; i < scripts->nelts; ++i) { entry = &entries[i]; /* * Stop loading scripts if this is a daemon process and * we have already been flagged to be shutdown. */ if (wsgi_daemon_shutdown) break; if (!strcmp(wsgi_daemon_group, entry->process_group)) { InterpreterObject *interp = NULL; PyObject *modules = NULL; PyObject *module = NULL; char *name = NULL; int exists = 0; interp = wsgi_acquire_interpreter(entry->application_group); if (!interp) { ap_log_error(APLOG_MARK, APLOG_CRIT, 0, wsgi_server, "mod_wsgi (pid=%d): Cannot acquire " "interpreter '%s’.", getpid(), entry->application_group); } /* Calculate the Python module name to be used for script. */ name = wsgi_module_name(p, entry->handler_script); /* * Use a lock around the check to see if the module is * already loaded and the import of the module. Strictly * speaking shouldn’t be required at this point. */ #if APR_HAS_THREADS Py_BEGIN_ALLOW_THREADS apr_thread_mutex_lock(wsgi_module_lock); Py_END_ALLOW_THREADS #endif modules = PyImport_GetModuleDict(); module = PyDict_GetItemString(modules, name); Py_XINCREF(module); if (module) exists = 1; /* * If script reloading is enabled and the module for it has * previously been loaded, see if it has been modified since * the last time it was accessed. */ if (module && wsgi_server_config->script_reloading) { if (wsgi_reload_required(p, NULL, entry->handler_script, module, NULL)) { /* * Script file has changed. Only support module * reloading for dispatch scripts. Remove the * module from the modules dictionary before * reloading it again. If code is executing within * the module at the time, the callers reference * count on the module should ensure it isn’t * actually destroyed until it is finished. */ Py_DECREF(module); module = NULL; PyDict_DelItemString(modules, name); } } if (!module) { module = wsgi_load_source(p, NULL, name, exists, entry->handler_script, entry->process_group, entry->application_group, ignore_system_exit); if (PyErr_Occurred()) PyErr_Clear(); } /* Safe now to release the module lock. */ #if APR_HAS_THREADS apr_thread_mutex_unlock(wsgi_module_lock); #endif /* Cleanup and release interpreter, */ Py_XDECREF(module); wsgi_release_interpreter(interp); } } } } /* The processors for directives. */ static int wsgi_parse_option(apr_pool_t *p, const char **line, const char **name, const char **value) { const char *str = *line, *strend; while (*str && apr_isspace(*str)) ++str; if (!*str || *str == ‘=’) { *line = str; return !APR_SUCCESS; } /* Option must be of form name=value. Extract the name. */ strend = str; while (*strend && *strend != ‘=’ && !apr_isspace(*strend)) ++strend; if (*strend != ‘=’) { *line = str; return !APR_SUCCESS; } *name = apr_pstrndup(p, str, strend-str); *line = strend+1; /* Now extract the value. Note that value can be quoted. */ *value = ap_getword_conf(p, line); return APR_SUCCESS; } static const char *wsgi_add_script_alias(cmd_parms *cmd, void *mconfig, const char *args) { const char *l = NULL; const char *a = NULL; WSGIServerConfig *sconfig = NULL; WSGIAliasEntry *entry = NULL; const char *option = NULL; const char *value = NULL; #if defined(MOD_WSGI_WITH_DAEMONS) const char *process_group = NULL; #else const char *process_group = ""; #endif const char *application_group = NULL; const char *callable_object = NULL; int pass_authorization = -1; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (!sconfig->alias_list) { sconfig->alias_list = apr_array_make(sconfig->pool, 20, sizeof(WSGIAliasEntry)); } l = ap_getword_conf(cmd->pool, &args); if (*l == ‘\0’ || *args == 0) { return apr_pstrcat(cmd->pool, cmd->cmd->name, " requires at least two arguments", cmd->cmd->errmsg ? ", " : NULL, cmd->cmd->errmsg, NULL); } a = ap_getword_conf(cmd->pool, &args); if (*a == ‘\0’) { return apr_pstrcat(cmd->pool, cmd->cmd->name, " requires at least two arguments", cmd->cmd->errmsg ? ", " : NULL, cmd->cmd->errmsg, NULL); } while (*args) { if (wsgi_parse_option(cmd->pool, &args, &option, &value) != APR_SUCCESS) { return "Invalid option to WSGI script alias definition."; } if (!strcmp(option, “application-group”)) { if (!*value) return "Invalid name for WSGI application group."; if (!strcmp(value, “%{GLOBAL}”)) value = ""; application_group = value; } #if defined(MOD_WSGI_WITH_DAEMONS) else if (!strcmp(option, “process-group”)) { if (!*value) return "Invalid name for WSGI process group."; if (!strcmp(value, “%{GLOBAL}”)) value = ""; process_group = value; } #endif else if (!strcmp(option, “callable-object”)) { if (!*value) return "Invalid name for WSGI callable object."; callable_object = value; } else if (!strcmp(option, “pass-authorization”)) { if (!*value) return "Invalid value for authorization flag."; if (strcasecmp(value, “Off”) == 0) pass_authorization = 0; else if (strcasecmp(value, “On”) == 0) pass_authorization = 1; else return "Invalid value for authorization flag."; } else return "Invalid option to WSGI script alias definition."; } entry = (WSGIAliasEntry *)apr_array_push(sconfig->alias_list); if (cmd->info) { entry->regexp = ap_pregcomp(cmd->pool, l, AP_REG_EXTENDED); if (!entry->regexp) return "Regular expression could not be compiled."; } entry->location = l; entry->application = a; entry->process_group = process_group; entry->application_group = application_group; entry->callable_object = callable_object; entry->pass_authorization = pass_authorization; /* * Only add to import list if both process group and application * group are specified, that they don’t include substitution values, * and in the case of WSGIScriptAliasMatch, that the WSGI script * target path doesn’t include substitutions from URL pattern. */ if (process_group && application_group && !strstr(process_group, “%{”) && !strstr(application_group, “%{”) && (!cmd->info || !strstr(a, “$”))) { WSGIScriptFile *object = NULL; if (!wsgi_import_list) { wsgi_import_list = apr_array_make(cmd->pool, 20, sizeof(WSGIScriptFile)); apr_pool_cleanup_register(cmd->pool, &wsgi_import_list, ap_pool_cleanup_set_null, apr_pool_cleanup_null); } object = (WSGIScriptFile *)apr_array_push(wsgi_import_list); object->handler_script = a; object->process_group = process_group; object->application_group = application_group; #if defined(MOD_WSGI_WITH_DAEMONS) if (*object->process_group && strcmp(object->process_group, “%{RESOURCE}”) != 0 && strcmp(object->process_group, “%{SERVER}”) != 0 && strcmp(object->process_group, “%{HOST}”) != 0) { WSGIProcessGroup *group = NULL; WSGIProcessGroup *entries = NULL; WSGIProcessGroup *entry = NULL; int i; if (!wsgi_daemon_list) return "WSGI process group not yet configured."; entries = (WSGIProcessGroup *)wsgi_daemon_list->elts; for (i = 0; i < wsgi_daemon_list->nelts; ++i) { entry = &entries[i]; if (!strcmp(entry->name, object->process_group)) { group = entry; break; } } if (!group) return "WSGI process group not yet configured."; if (cmd->server->server_hostname && group->server->server_hostname && strcmp(cmd->server->server_hostname, group->server->server_hostname) && group->server->is_virtual) { return "WSGI process group not accessible."; } if (!cmd->server->server_hostname && group->server->server_hostname && group->server->is_virtual) { return "WSGI process group not matchable."; } if (cmd->server->server_hostname && !group->server->server_hostname && group->server->is_virtual) { return "WSGI process group not matchable."; } } #endif } return NULL; } static const char *wsgi_set_verbose_debugging(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->verbose_debugging = 0; else if (strcasecmp(f, “On”) == 0) sconfig->verbose_debugging = 1; else return "WSGIVerboseDebugging must be one of: Off | On"; return NULL; } static const char *wsgi_set_lazy_initialization(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; if (strcasecmp(f, “Off”) == 0) wsgi_python_after_fork = 0; else if (strcasecmp(f, “On”) == 0) wsgi_python_after_fork = 1; else return "WSGILazyInitialization must be one of: Off | On"; return NULL; } static const char *wsgi_add_python_warnings(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; char **entry = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (!sconfig->python_warnings) { sconfig->python_warnings = apr_array_make(sconfig->pool, 5, sizeof(char*)); } entry = (char **)apr_array_push(sconfig->python_warnings); *entry = apr_pstrdup(sconfig->pool, f); return NULL; } #if PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION >= 6 static const char *wsgi_set_py3k_warning_flag(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->py3k_warning_flag = 0; else if (strcasecmp(f, “On”) == 0) sconfig->py3k_warning_flag = 1; else return "WSGIPy3kWarningFlag must be one of: Off | On"; return NULL; } #endif #if (PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >= 3) || \ (PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION >= 6) static const char *wsgi_set_dont_write_bytecode(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->dont_write_bytecode = 0; else if (strcasecmp(f, “On”) == 0) sconfig->dont_write_bytecode = 1; else return "WSGIDontWriteBytecode must be one of: Off | On"; return NULL; } #endif static const char *wsgi_set_python_optimize(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); sconfig->python_optimize = atoi(f); return NULL; } static const char *wsgi_set_python_home(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); sconfig->python_home = f; return NULL; } static const char *wsgi_set_python_path(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); sconfig->python_path = f; return NULL; } static const char *wsgi_set_python_eggs(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); sconfig->python_eggs = f; return NULL; } static const char *wsgi_set_python_hash_seed(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; /* * Must check this here because if we don’t and is wrong, then * Python interpreter will check later and may kill the process. */ if (f && *f != ‘\0’ && strcmp(f, “random”) != 0) { const char *endptr = f; unsigned long seed; seed = PyOS_strtoul((char *)f, (char **)&endptr, 10); if (*endptr != ‘\0’ || seed > 4294967295UL || (errno == ERANGE && seed == ULONG_MAX)) { return “WSGIPythonHashSeed must be \"random\” or an integer " "in range [0; 4294967295]"; } } sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); sconfig->python_hash_seed = f; return NULL; } static const char *wsgi_set_destroy_interpreter(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->destroy_interpreter = 0; else if (strcasecmp(f, “On”) == 0) sconfig->destroy_interpreter = 1; else return "WSGIDestroyInterpreter must be one of: Off | On"; return NULL; } static const char *wsgi_set_restrict_embedded(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->restrict_embedded = 0; else if (strcasecmp(f, “On”) == 0) sconfig->restrict_embedded = 1; else return "WSGIRestrictEmbedded must be one of: Off | On"; if (sconfig->restrict_embedded) { if (wsgi_python_required == -1) wsgi_python_required = 0; } return NULL; } static const char *wsgi_set_restrict_stdin(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->restrict_stdin = 0; else if (strcasecmp(f, “On”) == 0) sconfig->restrict_stdin = 1; else return "WSGIRestrictStdin must be one of: Off | On"; return NULL; } static const char *wsgi_set_restrict_stdout(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->restrict_stdout = 0; else if (strcasecmp(f, “On”) == 0) sconfig->restrict_stdout = 1; else return "WSGIRestrictStdout must be one of: Off | On"; return NULL; } static const char *wsgi_set_restrict_signal(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->restrict_signal = 0; else if (strcasecmp(f, “On”) == 0) sconfig->restrict_signal = 1; else return "WSGIRestrictSignal must be one of: Off | On"; return NULL; } static const char *wsgi_set_case_sensitivity(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->case_sensitivity = 0; else if (strcasecmp(f, “On”) == 0) sconfig->case_sensitivity = 1; else return "WSGICaseSensitivity must be one of: Off | On"; return NULL; } static const char *wsgi_set_restrict_process(cmd_parms *cmd, void *mconfig, const char *args) { apr_table_t *index = apr_table_make(cmd->pool, 5); if (cmd->path) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; dconfig->restrict_process = index; } else { WSGIServerConfig *sconfig = NULL; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); sconfig->restrict_process = index; } while (*args) { const char *option; option = ap_getword_conf(cmd->pool, &args); if (!strcmp(option, “%{GLOBAL}”)) option = ""; apr_table_setn(index, option, option); } return NULL; } static const char *wsgi_set_process_group(cmd_parms *cmd, void *mconfig, const char *n) { if (cmd->path) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; dconfig->process_group = n; } else { WSGIServerConfig *sconfig = NULL; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); sconfig->process_group = n; } return NULL; } static const char *wsgi_set_application_group(cmd_parms *cmd, void *mconfig, const char *n) { if (cmd->path) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; dconfig->application_group = n; } else { WSGIServerConfig *sconfig = NULL; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); sconfig->application_group = n; } return NULL; } static const char *wsgi_set_callable_object(cmd_parms *cmd, void *mconfig, const char *n) { if (cmd->path) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; dconfig->callable_object = n; } else { WSGIServerConfig *sconfig = NULL; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); sconfig->callable_object = n; } return NULL; } static const char *wsgi_add_import_script(cmd_parms *cmd, void *mconfig, const char *args) { WSGIScriptFile *object = NULL; const char *option = NULL; const char *value = NULL; if (!wsgi_import_list) { wsgi_import_list = apr_array_make(cmd->pool, 20, sizeof(WSGIScriptFile)); apr_pool_cleanup_register(cmd->pool, &wsgi_import_list, ap_pool_cleanup_set_null, apr_pool_cleanup_null); } object = (WSGIScriptFile *)apr_array_push(wsgi_import_list); object->handler_script = ap_getword_conf(cmd->pool, &args); object->process_group = NULL; object->application_group = NULL; if (!object->handler_script || !*object->handler_script) return "Location of import script not supplied."; while (*args) { if (wsgi_parse_option(cmd->pool, &args, &option, &value) != APR_SUCCESS) { return "Invalid option to WSGI import script definition."; } if (!strcmp(option, “application-group”)) { if (!*value) return "Invalid name for WSGI application group."; object->application_group = value; } #if defined(MOD_WSGI_WITH_DAEMONS) else if (!strcmp(option, “process-group”)) { if (!*value) return "Invalid name for WSGI process group."; object->process_group = value; } #endif else return "Invalid option to WSGI import script definition."; } if (!object->application_group) return "Name of WSGI application group required."; if (!strcmp(object->application_group, “%{GLOBAL}”)) object->application_group = ""; #if defined(MOD_WSGI_WITH_DAEMONS) if (!object->process_group) return "Name of WSGI process group required."; if (!strcmp(object->process_group, “%{GLOBAL}”)) object->process_group = ""; if (*object->process_group) { WSGIProcessGroup *group = NULL; WSGIProcessGroup *entries = NULL; WSGIProcessGroup *entry = NULL; int i; if (!wsgi_daemon_list) return "WSGI process group not yet configured."; entries = (WSGIProcessGroup *)wsgi_daemon_list->elts; for (i = 0; i < wsgi_daemon_list->nelts; ++i) { entry = &entries[i]; if (!strcmp(entry->name, object->process_group)) { group = entry; break; } } if (!group) return "WSGI process group not yet configured."; if (cmd->server->server_hostname && group->server->server_hostname && strcmp(cmd->server->server_hostname, group->server->server_hostname) && group->server->is_virtual) { return "WSGI process group not accessible."; } if (!cmd->server->server_hostname && group->server->server_hostname && group->server->is_virtual) { return "WSGI process group not matchable."; } if (cmd->server->server_hostname && !group->server->server_hostname && group->server->is_virtual) { return "WSGI process group not matchable."; } } #else object->process_group = ""; #endif if (!*object->process_group) wsgi_python_required = 1; return NULL; } static const char *wsgi_set_dispatch_script(cmd_parms *cmd, void *mconfig, const char *args) { WSGIScriptFile *object = NULL; const char *option = NULL; const char *value = NULL; object = newWSGIScriptFile(cmd->pool); object->handler_script = ap_getword_conf(cmd->pool, &args); if (!object->handler_script || !*object->handler_script) return "Location of dispatch script not supplied."; while (*args) { if (wsgi_parse_option(cmd->pool, &args, &option, &value) != APR_SUCCESS) { return "Invalid option to WSGI dispatch script definition."; } if (!strcmp(option, “application-group”)) { if (!*value) return "Invalid name for WSGI application group."; object->application_group = value; } else return "Invalid option to WSGI dispatch script definition."; } if (cmd->path) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; dconfig->dispatch_script = object; } else { WSGIServerConfig *sconfig = NULL; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); sconfig->dispatch_script = object; } wsgi_python_required = 1; return NULL; } static const char *wsgi_set_pass_apache_request(cmd_parms *cmd, void *mconfig, const char *f) { if (cmd->path) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; if (strcasecmp(f, “Off”) == 0) dconfig->pass_apache_request = 0; else if (strcasecmp(f, “On”) == 0) dconfig->pass_apache_request = 1; else return "WSGIPassApacheRequest must be one of: Off | On"; } else { WSGIServerConfig *sconfig = NULL; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->pass_apache_request = 0; else if (strcasecmp(f, “On”) == 0) sconfig->pass_apache_request = 1; else return "WSGIPassApacheRequest must be one of: Off | On"; } return NULL; } static const char *wsgi_set_pass_authorization(cmd_parms *cmd, void *mconfig, const char *f) { if (cmd->path) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; if (strcasecmp(f, “Off”) == 0) dconfig->pass_authorization = 0; else if (strcasecmp(f, “On”) == 0) dconfig->pass_authorization = 1; else return "WSGIPassAuthorization must be one of: Off | On"; } else { WSGIServerConfig *sconfig = NULL; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->pass_authorization = 0; else if (strcasecmp(f, “On”) == 0) sconfig->pass_authorization = 1; else return "WSGIPassAuthorization must be one of: Off | On"; } return NULL; } static const char *wsgi_set_script_reloading(cmd_parms *cmd, void *mconfig, const char *f) { if (cmd->path) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; if (strcasecmp(f, “Off”) == 0) dconfig->script_reloading = 0; else if (strcasecmp(f, “On”) == 0) dconfig->script_reloading = 1; else return "WSGIScriptReloading must be one of: Off | On"; } else { WSGIServerConfig *sconfig = NULL; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->script_reloading = 0; else if (strcasecmp(f, “On”) == 0) sconfig->script_reloading = 1; else return "WSGIScriptReloading must be one of: Off | On"; } return NULL; } static const char *wsgi_set_error_override(cmd_parms *cmd, void *mconfig, const char *f) { if (cmd->path) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; if (strcasecmp(f, “Off”) == 0) dconfig->error_override = 0; else if (strcasecmp(f, “On”) == 0) dconfig->error_override = 1; else return "WSGIErrorOverride must be one of: Off | On"; } else { WSGIServerConfig *sconfig = NULL; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->error_override = 0; else if (strcasecmp(f, “On”) == 0) sconfig->error_override = 1; else return "WSGIErrorOverride must be one of: Off | On"; } return NULL; } static const char *wsgi_set_chunked_request(cmd_parms *cmd, void *mconfig, const char *f) { if (cmd->path) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; if (strcasecmp(f, “Off”) == 0) dconfig->chunked_request = 0; else if (strcasecmp(f, “On”) == 0) dconfig->chunked_request = 1; else return "WSGIChunkedRequest must be one of: Off | On"; } else { WSGIServerConfig *sconfig = NULL; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->chunked_request = 0; else if (strcasecmp(f, “On”) == 0) sconfig->chunked_request = 1; else return "WSGIChunkedRequest must be one of: Off | On"; } return NULL; } static const char *wsgi_set_map_head_to_get(cmd_parms *cmd, void *mconfig, const char *f) { if (cmd->path) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; if (strcasecmp(f, “Off”) == 0) dconfig->map_head_to_get = 0; else if (strcasecmp(f, “On”) == 0) dconfig->map_head_to_get = 1; else if (strcasecmp(f, “Auto”) == 0) dconfig->map_head_to_get = 2; else return "WSGIMapHEADToGET must be one of: Off | On | Auto"; } else { WSGIServerConfig *sconfig = NULL; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->map_head_to_get = 0; else if (strcasecmp(f, “On”) == 0) sconfig->map_head_to_get = 1; else if (strcasecmp(f, “Auto”) == 0) sconfig->map_head_to_get = 2; else return "WSGIMapHEADToGET must be one of: Off | On | Auto"; } return NULL; } static const char *wsgi_set_ignore_activity(cmd_parms *cmd, void *mconfig, const char *f) { if (cmd->path) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; if (strcasecmp(f, “Off”) == 0) dconfig->ignore_activity = 0; else if (strcasecmp(f, “On”) == 0) dconfig->ignore_activity = 1; else return "WSGIIgnoreActivity must be one of: Off | On"; } else { WSGIServerConfig *sconfig = NULL; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->ignore_activity = 0; else if (strcasecmp(f, “On”) == 0) sconfig->ignore_activity = 1; else return "WSGIIgnoreActivity must be one of: Off | On"; } return NULL; } static char *wsgi_http2env(apr_pool_t *a, const char *w); static const char *wsgi_set_trusted_proxy_headers(cmd_parms *cmd, void *mconfig, const char *args) { apr_array_header_t *headers = NULL; if (cmd->path) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; if (!dconfig->trusted_proxy_headers) { headers = apr_array_make(cmd->pool, 3, sizeof(char*)); dconfig->trusted_proxy_headers = headers; } else headers = dconfig->trusted_proxy_headers; } else { WSGIServerConfig *sconfig = NULL; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (!sconfig->trusted_proxy_headers) { headers = apr_array_make(cmd->pool, 3, sizeof(char*)); sconfig->trusted_proxy_headers = headers; } else headers = sconfig->trusted_proxy_headers; } while (*args) { const char **entry = NULL; entry = (const char **)apr_array_push(headers); *entry = wsgi_http2env(cmd->pool, ap_getword_conf(cmd->pool, &args)); } return NULL; } static int wsgi_looks_like_ip(const char *ip) { static const char ipv4_set[] = "0123456789./"; static const char ipv6_set[] = "0123456789abcdef:/"; const char *ptr; /* Zero length value is not valid. */ if (!*ip) return 0; /* Determine if this could be a IPv6 or IPv4 address. */ ptr = ip; if (strchr(ip, ‘:’)) { while(*ptr && strchr(ipv6_set, *ptr) != NULL) ++ptr; } else { while(*ptr && strchr(ipv4_set, *ptr) != NULL) ++ptr; } return (*ptr == ‘\0’); } static const char *wsgi_set_trusted_proxies(cmd_parms *cmd, void *mconfig, const char *args) { apr_array_header_t *proxy_ips = NULL; if (cmd->path) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; if (!dconfig->trusted_proxies) { proxy_ips = apr_array_make(cmd->pool, 3, sizeof(char*)); dconfig->trusted_proxies = proxy_ips; } else proxy_ips = dconfig->trusted_proxies; } else { WSGIServerConfig *sconfig = NULL; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (!sconfig->trusted_proxies) { proxy_ips = apr_array_make(cmd->pool, 3, sizeof(char*)); sconfig->trusted_proxies = proxy_ips; } else proxy_ips = sconfig->trusted_proxies; } while (*args) { const char *proxy_ip; proxy_ip = ap_getword_conf(cmd->pool, &args); if (wsgi_looks_like_ip(proxy_ip)) { char *ip; char *mask; apr_ipsubnet_t **sub; apr_status_t rv; ip = apr_pstrdup(cmd->temp_pool, proxy_ip); if ((mask = ap_strchr(ip, ‘/’))) *mask++ = '\0’; sub = (apr_ipsubnet_t **)apr_array_push(proxy_ips); rv = apr_ipsubnet_create(sub, ip, mask, cmd->pool); if (rv != APR_SUCCESS) { char msgbuf[128]; apr_strerror(rv, msgbuf, sizeof(msgbuf)); return apr_pstrcat(cmd->pool, "Unable to parse trusted " "proxy IP address/subnet of \"", proxy_ip, "\". ", msgbuf, NULL); } } else { return apr_pstrcat(cmd->pool, "Unable to parse trusted proxy " "IP address/subnet of \"", proxy_ip, "\".", NULL); } } return NULL; } static const char *wsgi_set_enable_sendfile(cmd_parms *cmd, void *mconfig, const char *f) { if (cmd->path) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; if (strcasecmp(f, “Off”) == 0) dconfig->enable_sendfile = 0; else if (strcasecmp(f, “On”) == 0) dconfig->enable_sendfile = 1; else return "WSGIEnableSendfile must be one of: Off | On"; } else { WSGIServerConfig *sconfig = NULL; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->enable_sendfile = 0; else if (strcasecmp(f, “On”) == 0) sconfig->enable_sendfile = 1; else return "WSGIEnableSendfile must be one of: Off | On"; } return NULL; } static const char *wsgi_set_access_script(cmd_parms *cmd, void *mconfig, const char *args) { WSGIDirectoryConfig *dconfig = NULL; WSGIScriptFile *object = NULL; const char *option = NULL; const char *value = NULL; object = newWSGIScriptFile(cmd->pool); object->handler_script = ap_getword_conf(cmd->pool, &args); if (!object->handler_script || !*object->handler_script) return "Location of access script not supplied."; while (*args) { if (wsgi_parse_option(cmd->pool, &args, &option, &value) != APR_SUCCESS) { return "Invalid option to WSGI access script definition."; } if (!strcmp(option, “application-group”)) { if (!*value) return "Invalid name for WSGI application group."; object->application_group = value; } else return "Invalid option to WSGI access script definition."; } dconfig = (WSGIDirectoryConfig *)mconfig; dconfig->access_script = object; wsgi_python_required = 1; return NULL; } static const char *wsgi_set_auth_user_script(cmd_parms *cmd, void *mconfig, const char *args) { WSGIDirectoryConfig *dconfig = NULL; WSGIScriptFile *object = NULL; const char *option = NULL; const char *value = NULL; object = newWSGIScriptFile(cmd->pool); object->handler_script = ap_getword_conf(cmd->pool, &args); if (!object->handler_script || !*object->handler_script) return "Location of auth user script not supplied."; while (*args) { if (wsgi_parse_option(cmd->pool, &args, &option, &value) != APR_SUCCESS) { return "Invalid option to WSGI auth user script definition."; } if (!strcmp(option, “application-group”)) { if (!*value) return "Invalid name for WSGI application group."; object->application_group = value; } else return "Invalid option to WSGI auth user script definition."; } dconfig = (WSGIDirectoryConfig *)mconfig; dconfig->auth_user_script = object; wsgi_python_required = 1; return NULL; } static const char *wsgi_set_auth_group_script(cmd_parms *cmd, void *mconfig, const char *args) { WSGIDirectoryConfig *dconfig = NULL; WSGIScriptFile *object = NULL; const char *option = NULL; const char *value = NULL; object = newWSGIScriptFile(cmd->pool); object->handler_script = ap_getword_conf(cmd->pool, &args); if (!object->handler_script || !*object->handler_script) return "Location of auth group script not supplied."; while (*args) { if (wsgi_parse_option(cmd->pool, &args, &option, &value) != APR_SUCCESS) { return "Invalid option to WSGI auth group script definition."; } if (!strcmp(option, “application-group”)) { if (!*value) return "Invalid name for WSGI application group."; object->application_group = value; } else return "Invalid option to WSGI auth group script definition."; } dconfig = (WSGIDirectoryConfig *)mconfig; dconfig->auth_group_script = object; wsgi_python_required = 1; return NULL; } #if !defined(MOD_WSGI_WITH_AUTHN_PROVIDER) static const char *wsgi_set_user_authoritative(cmd_parms *cmd, void *mconfig, const char *f) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; if (strcasecmp(f, “Off”) == 0) dconfig->user_authoritative = 0; else if (strcasecmp(f, “On”) == 0) dconfig->user_authoritative = 1; else return "WSGIUserAuthoritative must be one of: Off | On"; return NULL; } #endif static const char *wsgi_set_group_authoritative(cmd_parms *cmd, void *mconfig, const char *f) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; if (strcasecmp(f, “Off”) == 0) dconfig->group_authoritative = 0; else if (strcasecmp(f, “On”) == 0) dconfig->group_authoritative = 1; else return "WSGIGroupAuthoritative must be one of: Off | On"; return NULL; } static const char *wsgi_add_handler_script(cmd_parms *cmd, void *mconfig, const char *args) { WSGIScriptFile *object = NULL; const char *name = NULL; const char *option = NULL; const char *value = NULL; name = ap_getword_conf(cmd->pool, &args); if (!name || !*name) return "Name for handler script not supplied."; object = newWSGIScriptFile(cmd->pool); object->handler_script = ap_getword_conf(cmd->pool, &args); if (!object->handler_script || !*object->handler_script) return "Location of handler script not supplied."; while (*args) { if (wsgi_parse_option(cmd->pool, &args, &option, &value) != APR_SUCCESS) { return "Invalid option to WSGI handler script definition."; } if (!strcmp(option, “process-group”)) { if (!*value) return "Invalid name for WSGI process group."; object->process_group = value; } else if (!strcmp(option, “application-group”)) { if (!*value) return "Invalid name for WSGI application group."; object->application_group = value; } else if (!strcmp(option, “pass-authorization”)) { if (!*value) return "Invalid value for authorization flag."; if (strcasecmp(value, “Off”) == 0) object->pass_authorization = "0"; else if (strcasecmp(value, “On”) == 0) object->pass_authorization = "1"; else return "Invalid value for authorization flag."; } else return "Invalid option to WSGI handler script definition."; } if (cmd->path) { WSGIDirectoryConfig *dconfig = NULL; dconfig = (WSGIDirectoryConfig *)mconfig; if (!dconfig->handler_scripts) dconfig->handler_scripts = apr_hash_make(cmd->pool); apr_hash_set(dconfig->handler_scripts, name, APR_HASH_KEY_STRING, object); } else { WSGIServerConfig *sconfig = NULL; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (!sconfig->handler_scripts) sconfig->handler_scripts = apr_hash_make(cmd->pool); apr_hash_set(sconfig->handler_scripts, name, APR_HASH_KEY_STRING, object); } return NULL; } static const char *wsgi_set_server_metrics(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->server_metrics = 0; else if (strcasecmp(f, “On”) == 0) sconfig->server_metrics = 1; else return "WSGIServerMetrics must be one of: Off | On"; return NULL; } static const char *wsgi_set_newrelic_config_file( cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); sconfig->newrelic_config_file = f; return NULL; } static const char *wsgi_set_newrelic_environment( cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); sconfig->newrelic_environment = f; return NULL; } /* Handler for the translate name phase. */ static long wsgi_alias_matches(const char *uri, const char *alias_fakename) { /* Code for this function from Apache mod_alias module. */ const char *aliasp = alias_fakename, *urip = uri; while (*aliasp) { if (*aliasp == ‘/’) { /* any number of ‘/’ in the alias matches any number in * the supplied URI, but there must be at least one… */ if (*urip != ‘/’) return 0; do { ++aliasp; } while (*aliasp == ‘/’); do { ++urip; } while (*urip == ‘/’); } else { /* Other characters are compared literally */ if (*urip++ != *aliasp++) return 0; } } /* Check last alias path component matched all the way */ if (aliasp[-1] != ‘/’ && *urip != ‘\0’ && *urip != ‘/’) return 0; /* Return number of characters from URI which matched (may be * greater than length of alias, since we may have matched * doubled slashes) */ return urip - uri; } static int wsgi_hook_intercept(request_rec *r) { WSGIServerConfig *config = NULL; apr_array_header_t *aliases = NULL; WSGIAliasEntry *entries = NULL; WSGIAliasEntry *entry = NULL; ap_regmatch_t matches[AP_MAX_REG_MATCH]; const char *location = NULL; const char *application = NULL; int i = 0; config = ap_get_module_config(r->server->module_config, &wsgi_module); if (!config->alias_list) return DECLINED; if (r->uri[0] != ‘/’ && r->uri[0]) return DECLINED; aliases = config->alias_list; entries = (WSGIAliasEntry *)aliases->elts; for (i = 0; i < aliases->nelts; ++i) { long l = 0; entry = &entries[i]; if (entry->regexp) { if (!ap_regexec(entry->regexp, r->uri, AP_MAX_REG_MATCH, matches, 0)) { if (entry->application) { l = matches[0].rm_eo; location = apr_pstrndup(r->pool, r->uri, l); application = ap_pregsub(r->pool, entry->application, r->uri, AP_MAX_REG_MATCH, matches); } } } else if (entry->location) { l = wsgi_alias_matches(r->uri, entry->location); location = entry->location; application = entry->application; } if (l > 0) { if (!strcmp(location, “/”)) { r->filename = apr_pstrcat(r->pool, application, r->uri, NULL); } else { r->filename = apr_pstrcat(r->pool, application, r->uri + l, NULL); } r->handler = "wsgi-script"; apr_table_setn(r->notes, "alias-forced-type", r->handler); if (entry->process_group) { apr_table_setn(r->notes, "mod_wsgi.process_group", entry->process_group); } if (entry->application_group) { apr_table_setn(r->notes, "mod_wsgi.application_group", entry->application_group); } if (entry->callable_object) { apr_table_setn(r->notes, "mod_wsgi.callable_object", entry->callable_object); } if (entry->pass_authorization == 0) apr_table_setn(r->notes, "mod_wsgi.pass_authorization", “0”); else if (entry->pass_authorization == 1) apr_table_setn(r->notes, "mod_wsgi.pass_authorization", “1”); return OK; } } return DECLINED; } /* Handler for the response handler phase. */ static void wsgi_drop_invalid_headers(request_rec *r); static void wsgi_process_proxy_headers(request_rec *r); static void wsgi_build_environment(request_rec *r) { WSGIRequestConfig *config = NULL; const char *value = NULL; const char *script_name = NULL; const char *path_info = NULL; conn_rec *c = r->connection; /* Grab request configuration. */ config = (WSGIRequestConfig *)ap_get_module_config(r->request_config, &wsgi_module); /* * Remove any invalid headers which use invalid characters. * This is necessary to ensure that someone doesn’t try and * take advantage of header spoofing. This can come about * where characters other than alphanumerics or '-' are used * as the conversion of non alphanumerics to ‘_’ means one * can get collisions. This is technically only an issue * with Apache 2.2 as Apache 2.4 addresses the problem and * drops them anyway. Still go through and drop them even * for Apache 2.4 as not sure which version of Apache 2.4 * introduces the change. */ wsgi_drop_invalid_headers®; /* Populate environment with standard CGI variables. */ ap_add_cgi_vars®; ap_add_common_vars®; /* * Mutate a HEAD request into a GET request. This is * required because WSGI specification doesn’t lay out * clearly how WSGI applications should treat a HEAD * request. Generally authors of WSGI applications or * frameworks take it that they do not need to return any * content, but this screws up any Apache output filters * which need to see all the response content in order to * correctly set up response headers for a HEAD request such * that they are the same as a GET request. Thus change a * HEAD request into a GET request to ensure that request * content is generated. If using Apache 2.X we can skip * doing this if we know there is no output filter that * might change the content and/or headers. * * The default behaviour here of changing it if an output * filter is detected can be overridden using the directive * WSGIMapHEADToGet. The default value is 'Auto’. If set to * ‘On’ then it remapped regardless of whether an output * filter is present. If ‘Off’ then it will be left alone * and the original value used. */ if (config->map_head_to_get == 2) { if (r->method_number == M_GET && r->header_only && r->output_filters->frec->ftype < AP_FTYPE_PROTOCOL) apr_table_setn(r->subprocess_env, "REQUEST_METHOD", “GET”); } else if (config->map_head_to_get == 1) { if (r->method_number == M_GET) apr_table_setn(r->subprocess_env, "REQUEST_METHOD", “GET”); } /* * If enabled, pass along authorisation headers which Apache * leaves out of CGI environment. WSGI still needs to see * these if it needs to implement any of the standard * authentication schemes such as Basic and Digest. We do * not pass these through by default though as it can result * in passwords being leaked though to a WSGI application * when it shouldn’t. This would be a problem where there is * some sort of site wide authorisation scheme in place * which has got nothing to do with specific applications. */ if (config->pass_authorization) { value = apr_table_get(r->headers_in, “Authorization”); if (value) apr_table_setn(r->subprocess_env, "HTTP_AUTHORIZATION", value); } /* If PATH_INFO not set, set it to an empty string. */ value = apr_table_get(r->subprocess_env, “PATH_INFO”); if (!value) apr_table_setn(r->subprocess_env, "PATH_INFO", “”); /* * Multiple slashes are not always collapsed into a single * slash in SCRIPT_NAME and PATH_INFO with Apache 1.3 and * Apache 2.X behaving a bit differently. Because some WSGI * applications don’t deal with multiple slashes properly we * collapse any duplicate slashes to a single slash so * Apache behaviour is consistent across all versions. We * don’t care that PATH_TRANSLATED can on Apache 1.3 still * contain multiple slashes as that should not be getting * used from a WSGI application anyway. */ script_name = apr_table_get(r->subprocess_env, “SCRIPT_NAME”); if (*script_name == ‘/’) { while (*script_name && (*(script_name+1) == ‘/’)) script_name++; script_name = apr_pstrdup(r->pool, script_name); ap_no2slash((char*)script_name); apr_table_setn(r->subprocess_env, "SCRIPT_NAME", script_name); } path_info = apr_table_get(r->subprocess_env, “PATH_INFO”); if (*path_info == ‘/’) { while (*path_info && (*(path_info+1) == ‘/’)) path_info++; path_info = apr_pstrdup(r->pool, path_info); ap_no2slash((char*)path_info); apr_table_setn(r->subprocess_env, "PATH_INFO", path_info); } /* * Save away the SCRIPT_NAME and PATH_INFO values at this point * so we have a way of determining if they are rewritten somehow. * This can be important when dealing with rewrite rules and * a trusted header was being handled for SCRIPT_NAME. */ apr_table_setn(r->subprocess_env, "mod_wsgi.script_name", script_name); apr_table_setn(r->subprocess_env, "mod_wsgi.path_info", path_info); /* * Perform fixups on environment based on trusted proxy headers * sent through from a front end proxy. */ wsgi_process_proxy_headers®; /* * Determine whether connection uses HTTPS protocol. This has * to be done after and fixups due to trusted proxy headers. */ if (!wsgi_is_https) wsgi_is_https = APR_RETRIEVE_OPTIONAL_FN(ssl_is_https); if (wsgi_is_https && wsgi_is_https(r->connection)) apr_table_set(r->subprocess_env, "HTTPS", “1”); /* * Set values specific to mod_wsgi configuration. These control * aspects of how a request is managed but don’t strictly need * to be passed through to the application itself. It is though * easier to set them here as then they are carried across to * the daemon process as part of the environment where they can * be extracted and used. */ apr_table_setn(r->subprocess_env, "mod_wsgi.process_group", config->process_group); apr_table_setn(r->subprocess_env, "mod_wsgi.application_group", config->application_group); apr_table_setn(r->subprocess_env, "mod_wsgi.callable_object", config->callable_object); apr_table_setn(r->subprocess_env, "mod_wsgi.request_handler", r->handler); apr_table_setn(r->subprocess_env, "mod_wsgi.handler_script", config->handler_script); apr_table_setn(r->subprocess_env, "mod_wsgi.script_reloading", apr_psprintf(r->pool, "%d", config->script_reloading)); #if defined(MOD_WSGI_WITH_DAEMONS) apr_table_setn(r->subprocess_env, "mod_wsgi.listener_host", c->local_addr->hostname ? c->local_addr->hostname : “”); apr_table_setn(r->subprocess_env, "mod_wsgi.listener_port", apr_psprintf(r->pool, "%d", c->local_addr->port)); #endif apr_table_setn(r->subprocess_env, "mod_wsgi.enable_sendfile", apr_psprintf(r->pool, "%d", config->enable_sendfile)); apr_table_setn(r->subprocess_env, "mod_wsgi.ignore_activity", apr_psprintf(r->pool, "%d", config->ignore_activity)); apr_table_setn(r->subprocess_env, "mod_wsgi.request_start", apr_psprintf(r->pool, “%” APR_TIME_T_FMT, r->request_time)); #if AP_MODULE_MAGIC_AT_LEAST(20100923,2) if (!r->log_id) { const char **id; /* Need to cast const away. */ id = &((request_rec *)r)->log_id; ap_run_generate_log_id(c, r, id); } if (r->log_id) apr_table_setn(r->subprocess_env, "mod_wsgi.request_id", r->log_id); if (r->connection->log_id) apr_table_setn(r->subprocess_env, "mod_wsgi.connection_id", r->connection->log_id); #endif } typedef struct { PyObject_HEAD request_rec *r; WSGIRequestConfig *config; PyObject *log; } DispatchObject; static DispatchObject *newDispatchObject(request_rec *r, WSGIRequestConfig *config) { DispatchObject *self; self = PyObject_New(DispatchObject, &Dispatch_Type); if (self == NULL) return NULL; self->config = config; self->r = r; self->log = newLogObject(r, APLOG_ERR, NULL, 0); return self; } static void Dispatch_dealloc(DispatchObject *self) { Py_DECREF(self->log); PyObject_Del(self); } static PyObject *Dispatch_environ(DispatchObject *self, const char *group) { request_rec *r = NULL; PyObject *vars = NULL; PyObject *object = NULL; const apr_array_header_t *head = NULL; const apr_table_entry_t *elts = NULL; int i = 0; /* Create the WSGI environment dictionary. */ vars = PyDict_New(); /* Merge the CGI environment into the WSGI environment. */ r = self->r; head = apr_table_elts(r->subprocess_env); elts = (apr_table_entry_t *)head->elts; for (i = 0; i < head->nelts; ++i) { if (elts[i].key) { if (elts[i].val) { #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(elts[i].val, strlen(elts[i].val), NULL); #else object = PyString_FromString(elts[i].val); #endif PyDict_SetItemString(vars, elts[i].key, object); Py_DECREF(object); } else PyDict_SetItemString(vars, elts[i].key, Py_None); } } /* * Need to override process and application group as they * are set to the default target, where as we need to set * them to context dispatch script is run in. Also need * to remove callable object reference. */ #if PY_MAJOR_VERSION >= 3 object = PyUnicode_FromString(“”); #else object = PyString_FromString(“”); #endif PyDict_SetItemString(vars, "mod_wsgi.process_group", object); Py_DECREF(object); #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(group, strlen(group), NULL); #else object = PyString_FromString(group); #endif PyDict_SetItemString(vars, "mod_wsgi.application_group", object); Py_DECREF(object); PyDict_DelItemString(vars, “mod_wsgi.callable_object”); /* * Setup log object for WSGI errors. Don’t decrement * reference to log object as keep reference to it. */ object = (PyObject *)self->log; PyDict_SetItemString(vars, "wsgi.errors", object); /* * If Apache extensions are enabled add a CObject reference * to the Apache request_rec structure instance. */ if (!wsgi_daemon_pool && self->config->pass_apache_request) { #if (PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >= 2) || \ (PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION >= 7) object = PyCapsule_New(self->r, 0, 0); #else object = PyCObject_FromVoidPtr(self->r, 0); #endif PyDict_SetItemString(vars, "apache.request_rec", object); Py_DECREF(object); } /* * Extensions for accessing SSL certificate information from * mod_ssl when in use. */ #if 0 object = PyObject_GetAttrString((PyObject *)self, “ssl_is_https”); PyDict_SetItemString(vars, "mod_ssl.is_https", object); Py_DECREF(object); object = PyObject_GetAttrString((PyObject *)self, “ssl_var_lookup”); PyDict_SetItemString(vars, "mod_ssl.var_lookup", object); Py_DECREF(object); #endif return vars; } static PyObject *Dispatch_ssl_is_https(DispatchObject *self, PyObject *args) { APR_OPTIONAL_FN_TYPE(ssl_is_https) *ssl_is_https = 0; if (!self->r) { PyErr_SetString(PyExc_RuntimeError, “request object has expired”); return NULL; } if (!PyArg_ParseTuple(args, “:ssl_is_https”)) return NULL; ssl_is_https = APR_RETRIEVE_OPTIONAL_FN(ssl_is_https); if (ssl_is_https == 0) return Py_BuildValue("i", 0); return Py_BuildValue("i", ssl_is_https(self->r->connection)); } static PyObject *Dispatch_ssl_var_lookup(DispatchObject *self, PyObject *args) { APR_OPTIONAL_FN_TYPE(ssl_var_lookup) *ssl_var_lookup = 0; PyObject *item = NULL; char *name = 0; char *value = 0; if (!self->r) { PyErr_SetString(PyExc_RuntimeError, “request object has expired”); return NULL; } if (!PyArg_ParseTuple(args, "O:ssl_var_lookup", &item)) return NULL; #if PY_MAJOR_VERSION >= 3 if (PyUnicode_Check(item)) { PyObject *latin_item; latin_item = PyUnicode_AsLatin1String(item); if (!latin_item) { PyErr_Format(PyExc_TypeError, "byte string value expected, " “value containing non ‘latin-1’ characters found”); Py_DECREF(item); return NULL; } Py_DECREF(item); item = latin_item; } #endif if (!PyString_Check(item)) { PyErr_Format(PyExc_TypeError, "byte string value expected, value " "of type %.200s found", item->ob_type->tp_name); Py_DECREF(item); return NULL; } name = PyString_AsString(item); ssl_var_lookup = APR_RETRIEVE_OPTIONAL_FN(ssl_var_lookup); if (ssl_var_lookup == 0) { Py_INCREF(Py_None); return Py_None; } value = ssl_var_lookup(self->r->pool, self->r->server, self->r->connection, self->r, name); if (!value) { Py_INCREF(Py_None); return Py_None; } #if PY_MAJOR_VERSION >= 3 return PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else return PyString_FromString(value); #endif } static PyMethodDef Dispatch_methods[] = { { "ssl_is_https", (PyCFunction)Dispatch_ssl_is_https, METH_VARARGS, 0 }, { "ssl_var_lookup", (PyCFunction)Dispatch_ssl_var_lookup, METH_VARARGS, 0 }, { NULL, NULL} }; static PyTypeObject Dispatch_Type = { PyVarObject_HEAD_INIT(NULL, 0) "mod_wsgi.Dispatch", /*tp_name*/ sizeof(DispatchObject), /*tp_basicsize*/ 0, /*tp_itemsize*/ /* methods */ (destructor)Dispatch_dealloc, /*tp_dealloc*/ 0, /*tp_print*/ 0, /*tp_getattr*/ 0, /*tp_setattr*/ 0, /*tp_compare*/ 0, /*tp_repr*/ 0, /*tp_as_number*/ 0, /*tp_as_sequence*/ 0, /*tp_as_mapping*/ 0, /*tp_hash*/ 0, /*tp_call*/ 0, /*tp_str*/ 0, /*tp_getattro*/ 0, /*tp_setattro*/ 0, /*tp_as_buffer*/ Py_TPFLAGS_DEFAULT, /*tp_flags*/ 0, /*tp_doc*/ 0, /*tp_traverse*/ 0, /*tp_clear*/ 0, /*tp_richcompare*/ 0, /*tp_weaklistoffset*/ 0, /*tp_iter*/ 0, /*tp_iternext*/ Dispatch_methods, /*tp_methods*/ 0, /*tp_members*/ 0, /*tp_getset*/ 0, /*tp_base*/ 0, /*tp_dict*/ 0, /*tp_descr_get*/ 0, /*tp_descr_set*/ 0, /*tp_dictoffset*/ 0, /*tp_init*/ 0, /*tp_alloc*/ 0, /*tp_new*/ 0, /*tp_free*/ 0, /*tp_is_gc*/ }; static int wsgi_execute_dispatch(request_rec *r) { WSGIRequestConfig *config; InterpreterObject *interp = NULL; PyObject *modules = NULL; PyObject *module = NULL; char *name = NULL; int exists = 0; const char *script = NULL; const char *group = NULL; int status; /* Grab request configuration. */ config = (WSGIRequestConfig *)ap_get_module_config(r->request_config, &wsgi_module); if (!config->dispatch_script) { ap_log_error(APLOG_MARK, APLOG_ERR, 0, wsgi_server, "mod_wsgi (pid=%d): Location of WSGI dispatch " "script not provided.", getpid()); return HTTP_INTERNAL_SERVER_ERROR; } /* * Acquire the desired python interpreter. Once this is done * it is safe to start manipulating python objects. */ script = config->dispatch_script->handler_script; group = wsgi_server_group(r, config->dispatch_script->application_group); interp = wsgi_acquire_interpreter(group); if (!interp) { ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r, "mod_wsgi (pid=%d): Cannot acquire interpreter ‘%s’.", getpid(), group); return HTTP_INTERNAL_SERVER_ERROR; } /* Calculate the Python module name to be used for script. */ name = wsgi_module_name(r->pool, script); /* * Use a lock around the check to see if the module is * already loaded and the import of the module to prevent * two request handlers trying to import the module at the * same time. */ #if APR_HAS_THREADS Py_BEGIN_ALLOW_THREADS apr_thread_mutex_lock(wsgi_module_lock); Py_END_ALLOW_THREADS #endif modules = PyImport_GetModuleDict(); module = PyDict_GetItemString(modules, name); Py_XINCREF(module); if (module) exists = 1; /* * If script reloading is enabled and the module for it has * previously been loaded, see if it has been modified since * the last time it was accessed. */ if (module && config->script_reloading) { if (wsgi_reload_required(r->pool, r, script, module, NULL)) { /* * Script file has changed. Only support module * reloading for dispatch scripts. Remove the * module from the modules dictionary before * reloading it again. If code is executing within * the module at the time, the callers reference * count on the module should ensure it isn’t * actually destroyed until it is finished. */ Py_DECREF(module); module = NULL; PyDict_DelItemString(modules, name); } } if (!module) { module = wsgi_load_source(r->pool, r, name, exists, script, "", group, 0); } /* Safe now to release the module lock. */ #if APR_HAS_THREADS apr_thread_mutex_unlock(wsgi_module_lock); #endif /* Log any details of exceptions if import failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); /* Assume everything will be okay for now. */ status = OK; /* Determine if script exists and execute it. */ if (module) { PyObject *module_dict = NULL; PyObject *object = NULL; DispatchObject *adapter = NULL; module_dict = PyModule_GetDict(module); adapter = newDispatchObject(r, config); if (adapter) { PyObject *vars = NULL; PyObject *args = NULL; PyObject *method = NULL; vars = Dispatch_environ(adapter, group); /* First check process_group(). */ #if defined(MOD_WSGI_WITH_DAEMONS) object = PyDict_GetItemString(module_dict, “process_group”); if (object) { PyObject *result = NULL; if (adapter) { Py_INCREF(object); args = Py_BuildValue("(O)", vars); result = PyObject_CallObject(object, args); Py_DECREF(args); Py_DECREF(object); if (result) { if (result != Py_None) { if (PyString_Check(result)) { const char *s; s = PyString_AsString(result); s = apr_pstrdup(r->pool, s); s = wsgi_process_group(r, s); config->process_group = s; apr_table_setn(r->subprocess_env, "mod_wsgi.process_group", config->process_group); } #if PY_MAJOR_VERSION >= 3 else if (PyUnicode_Check(result)) { PyObject *latin_item; latin_item = PyUnicode_AsLatin1String(result); if (!latin_item) { PyErr_SetString(PyExc_TypeError, "Process group must be " "a byte string, value " "containing non ‘latin-1’ " “characters found”); status = HTTP_INTERNAL_SERVER_ERROR; } else { const char *s; Py_DECREF(result); result = latin_item; s = PyString_AsString(result); s = apr_pstrdup(r->pool, s); s = wsgi_process_group(r, s); config->process_group = s; apr_table_setn(r->subprocess_env, "mod_wsgi.process_group", config->process_group); } } #endif else { PyErr_SetString(PyExc_TypeError, "Process " “group must be a byte string”); status = HTTP_INTERNAL_SERVER_ERROR; } } Py_DECREF(result); } else status = HTTP_INTERNAL_SERVER_ERROR; /* Log any details of exceptions if execution failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); } object = NULL; } #endif /* Now check application_group(). */ if (status == OK) object = PyDict_GetItemString(module_dict, “application_group”); if (object) { PyObject *result = NULL; if (adapter) { Py_INCREF(object); args = Py_BuildValue("(O)", vars); result = PyObject_CallObject(object, args); Py_DECREF(args); Py_DECREF(object); if (result) { if (result != Py_None) { if (PyString_Check(result)) { const char *s; s = PyString_AsString(result); s = apr_pstrdup(r->pool, s); s = wsgi_application_group(r, s); config->application_group = s; apr_table_setn(r->subprocess_env, "mod_wsgi.application_group", config->application_group); } #if PY_MAJOR_VERSION >= 3 else if (PyUnicode_Check(result)) { PyObject *latin_item; latin_item = PyUnicode_AsLatin1String(result); if (!latin_item) { PyErr_SetString(PyExc_TypeError, "Application group must " "be a byte string, value " "containing non ‘latin-1’ " “characters found”); status = HTTP_INTERNAL_SERVER_ERROR; } else { const char *s; Py_DECREF(result); result = latin_item; s = PyString_AsString(result); s = apr_pstrdup(r->pool, s); s = wsgi_application_group(r, s); config->application_group = s; apr_table_setn(r->subprocess_env, "mod_wsgi.application_group", config->application_group); } } #endif else { PyErr_SetString(PyExc_TypeError, "Application " "group must be a string " “object”); status = HTTP_INTERNAL_SERVER_ERROR; } } Py_DECREF(result); } else status = HTTP_INTERNAL_SERVER_ERROR; /* Log any details of exceptions if execution failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); } object = NULL; } /* Now check callable_object(). */ if (status == OK) object = PyDict_GetItemString(module_dict, “callable_object”); if (object) { PyObject *result = NULL; if (adapter) { Py_INCREF(object); args = Py_BuildValue("(O)", vars); result = PyObject_CallObject(object, args); Py_DECREF(args); Py_DECREF(object); if (result) { if (result != Py_None) { if (PyString_Check(result)) { const char *s; s = PyString_AsString(result); s = apr_pstrdup(r->pool, s); s = wsgi_callable_object(r, s); config->callable_object = s; apr_table_setn(r->subprocess_env, "mod_wsgi.callable_object", config->callable_object); } #if PY_MAJOR_VERSION >= 3 else if (PyUnicode_Check(result)) { PyObject *latin_item; latin_item = PyUnicode_AsLatin1String(result); if (!latin_item) { PyErr_SetString(PyExc_TypeError, "Callable object must " "be a byte string, value " "containing non ‘latin-1’ " “characters found”); status = HTTP_INTERNAL_SERVER_ERROR; } else { const char *s; Py_DECREF(result); result = latin_item; s = PyString_AsString(result); s = apr_pstrdup(r->pool, s); s = wsgi_callable_object(r, s); config->callable_object = s; apr_table_setn(r->subprocess_env, "mod_wsgi.callable_object", config->callable_object); } } #endif else { PyErr_SetString(PyExc_TypeError, "Callable " "object must be a string " “object”); status = HTTP_INTERNAL_SERVER_ERROR; } } Py_DECREF(result); } else status = HTTP_INTERNAL_SERVER_ERROR; /* Log any details of exceptions if execution failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); } object = NULL; } /* * Wipe out references to Apache request object * held by Python objects, so can detect when an * application holds on to the transient Python * objects beyond the life of the request and * thus raise an exception if they are used. */ adapter->r = NULL; /* Close the log object so data is flushed. */ method = PyObject_GetAttrString(adapter->log, “close”); if (!method) { PyErr_Format(PyExc_AttributeError, "’%s’ object has no attribute 'close’", adapter->log->ob_type->tp_name); } else { object = PyObject_CallObject(method, NULL); } Py_XDECREF(object); Py_XDECREF(method); /* No longer need adapter object. */ Py_DECREF((PyObject *)adapter); /* Log any details of exceptions if execution failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); Py_DECREF(vars); } } /* Cleanup and release interpreter, */ Py_XDECREF(module); wsgi_release_interpreter(interp); return status; } static int wsgi_is_script_aliased(request_rec *r) { const char *t = NULL; t = apr_table_get(r->notes, “alias-forced-type”); return t && (!strcasecmp(t, “wsgi-script”)); } #if defined(MOD_WSGI_WITH_DAEMONS) static int wsgi_execute_remote(request_rec *r); #endif static int wsgi_hook_handler(request_rec *r) { int status; apr_off_t limit = 0; WSGIRequestConfig *config = NULL; const char *value = NULL; const char *tenc = NULL; const char *lenp = NULL; /* Filter out the obvious case of no handler defined. */ if (!r->handler) return DECLINED; /* * Construct request configuration and cache it in the * request object against this module so can access it later * from handler code. */ config = wsgi_create_req_config(r->pool, r); ap_set_module_config(r->request_config, &wsgi_module, config); /* * Only process requests for this module. First check for * where target is the actual WSGI script. Then need to * check for the case where handler name mapped to a handler * script definition. */ if (!strcmp(r->handler, “wsgi-script”) || !strcmp(r->handler, “application/x-httpd-wsgi”)) { /* * Ensure that have adequate privileges to run the WSGI * script. Require ExecCGI to be specified in Options for * this. In doing this, using the wider interpretation that * ExecCGI refers to any executable like script even though * not a separate process execution. */ if (!(ap_allow_options® & OPT_EXECCGI) && !wsgi_is_script_aliased®) { wsgi_log_script_error(r, "Options ExecCGI is off in this " "directory", r->filename); return HTTP_FORBIDDEN; } /* Ensure target script exists and is a file. */ if (r->finfo.filetype == 0) { wsgi_log_script_error(r, "Target WSGI script not found or unable " "to stat", r->filename); return HTTP_NOT_FOUND; } if (r->finfo.filetype == APR_DIR) { wsgi_log_script_error(r, "Attempt to invoke directory as WSGI " "application", r->filename); return HTTP_FORBIDDEN; } if (wsgi_is_script_aliased®) { /* * Allow any configuration supplied through request notes to * override respective values. Request notes are used when * configuration supplied with WSGIScriptAlias directives. */ if ((value = apr_table_get(r->notes, “mod_wsgi.process_group”))) config->process_group = wsgi_process_group(r, value); if ((value = apr_table_get(r->notes, “mod_wsgi.application_group”))) config->application_group = wsgi_application_group(r, value); if ((value = apr_table_get(r->notes, “mod_wsgi.callable_object”))) config->callable_object = value; if ((value = apr_table_get(r->notes, “mod_wsgi.pass_authorization”))) { if (!strcmp(value, “1”)) config->pass_authorization = 1; else config->pass_authorization = 0; } } } #if 0 else if (strstr(r->handler, “wsgi-handler=”) == r->handler) { config->handler_script = apr_pstrcat(r->pool, r->handler+13, NULL); config->callable_object = "handle_request"; } #endif else if (config->handler_scripts) { WSGIScriptFile *entry; entry = (WSGIScriptFile *)apr_hash_get(config->handler_scripts, r->handler, APR_HASH_KEY_STRING); if (entry) { config->handler_script = entry->handler_script; config->callable_object = "handle_request"; if ((value = entry->process_group)) config->process_group = wsgi_process_group(r, value); if ((value = entry->application_group)) config->application_group = wsgi_application_group(r, value); if ((value = entry->pass_authorization)) { if (!strcmp(value, “1”)) config->pass_authorization = 1; else config->pass_authorization = 0; } } else return DECLINED; } else return DECLINED; /* * Honour AcceptPathInfo directive. Default behaviour is * accept additional path information. */ #if AP_MODULE_MAGIC_AT_LEAST(20011212,0) if ((r->used_path_info == AP_REQ_REJECT_PATH_INFO) && r->path_info && *r->path_info) { wsgi_log_script_error(r, "AcceptPathInfo off disallows user’s path", r->filename); return HTTP_NOT_FOUND; } #endif /* * Setup policy to apply if request contains a body. Note that the * WSGI specification doesn’t strictly allow for chunked request * content as CONTENT_LENGTH is required when reading input and * an application isn’t meant to read more than what is defined by * CONTENT_LENGTH. We still optionally allow chunked request content. * For an application to use the content, it has to ignore the WSGI * specification and use read() with no arguments to read all * available input, or call read() with specific block size until * read() returns an empty string. */ tenc = apr_table_get(r->headers_in, “Transfer-Encoding”); if (tenc) { /* Only chunked transfer encoding is supported. */ if (strcasecmp(tenc, “chunked”)) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Unexpected value for Transfer-Encoding of ‘%s’ " "supplied. Only ‘chunked’ supported.", tenc), r->filename); return HTTP_NOT_IMPLEMENTED; } /* Only allow chunked requests when explicitly enabled. */ if (!config->chunked_request) { wsgi_log_script_error(r, "Received request requiring chunked " "transfer encoding, but optional support for chunked " "transfer encoding has not been enabled.", r->filename); return HTTP_LENGTH_REQUIRED; } /* * When chunked transfer encoding is specified, there should * not be any content length specified. */ if (lenp) { wsgi_log_script_error(r, "Unexpected Content-Length header " "supplied where Transfer-Encoding was specified " "as 'chunked’.", r->filename); return HTTP_BAD_REQUEST; } } /* * Check to see if the request content is too large if the * Content-Length header is defined then end the request here. We do * this as otherwise it will not be done until first time input data * is read in by the application. Problem is that underlying HTTP * output filter will also generate a 413 response and the error * raised from the application will be appended to that. The call to * ap_discard_request_body() is hopefully enough to trigger sending * of the 413 response by the HTTP filter. */ lenp = apr_table_get(r->headers_in, “Content-Length”); if (lenp) { char *endstr; apr_off_t length; if (wsgi_strtoff(&length, lenp, &endstr, 10) || *endstr || length < 0) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Invalid Content-Length header value of ‘%s’ was " "supplied.", lenp), r->filename); return HTTP_BAD_REQUEST; } limit = ap_get_limit_req_body®; if (limit && limit < length) { ap_discard_request_body®; return OK; } } /* Build the sub process environment. */ config->request_start = r->request_time; wsgi_build_environment®; /* * If a dispatch script has been provided, as appropriate * allow it to override any of the configuration related * to what context the script will be executed in and what * the target callable object for the application is. */ if (config->dispatch_script) { status = wsgi_execute_dispatch®; if (status != OK) return status; } /* * Execute the target WSGI application script or proxy * request to one of the daemon processes as appropriate. */ #if defined(MOD_WSGI_WITH_DAEMONS) status = wsgi_execute_remote®; if (status != DECLINED) return status; #endif #if defined(MOD_WSGI_DISABLE_EMBEDDED) wsgi_log_script_error(r, "Embedded mode of mod_wsgi disabled at compile " "time", r->filename); return HTTP_INTERNAL_SERVER_ERROR; #endif if (wsgi_server_config->restrict_embedded == 1) { wsgi_log_script_error(r, "Embedded mode of mod_wsgi disabled by " "runtime configuration", r->filename); return HTTP_INTERNAL_SERVER_ERROR; } return wsgi_execute_script®; } /* * Apache 2.X and UNIX specific code for creation and management * of distinct daemon processes. */ #if defined(MOD_WSGI_WITH_DAEMONS) static const char *wsgi_add_daemon_process(cmd_parms *cmd, void *mconfig, const char *args) { const char *name = NULL; const char *user = NULL; const char *group = NULL; int processes = 1; int multiprocess = 0; int threads = 15; long umask = -1; const char *root = NULL; const char *home = NULL; const char *lang = NULL; const char *locale = NULL; const char *python_home = NULL; const char *python_path = NULL; const char *python_eggs = NULL; int stack_size = 0; int maximum_requests = 0; int startup_timeout = 0; int shutdown_timeout = 5; int deadlock_timeout = 300; int inactivity_timeout = 0; int request_timeout = 0; int graceful_timeout = 15; int eviction_timeout = 0; int restart_interval = 0; int connect_timeout = 15; int socket_timeout = 0; int queue_timeout = 0; const char *socket_user = NULL; int listen_backlog = WSGI_LISTEN_BACKLOG; const char *display_name = NULL; int send_buffer_size = 0; int recv_buffer_size = 0; int header_buffer_size = 0; int response_buffer_size = 0; int response_socket_timeout = 0; const char *script_user = NULL; const char *script_group = NULL; int cpu_time_limit = 0; int cpu_priority = 0; apr_int64_t memory_limit = 0; apr_int64_t virtual_memory_limit = 0; uid_t uid; uid_t gid; const char *groups_list = NULL; int groups_count = 0; gid_t *groups = NULL; int server_metrics = 0; const char *newrelic_config_file = NULL; const char *newrelic_environment = NULL; const char *option = NULL; const char *value = NULL; WSGIProcessGroup *entries = NULL; WSGIProcessGroup *entry = NULL; int i; /* * Set the defaults for user/group from values * defined for the User/Group directives in main * Apache configuration. */ uid = ap_unixd_config.user_id; user = ap_unixd_config.user_name; gid = ap_unixd_config.group_id; /* Now parse options for directive. */ name = ap_getword_conf(cmd->pool, &args); if (!name || !*name) return "Name of WSGI daemon process not supplied."; while (*args) { if (wsgi_parse_option(cmd->pool, &args, &option, &value) != APR_SUCCESS) { return "Invalid option to WSGI daemon process definition."; } if (!strcmp(option, “user”)) { if (!*value) return "Invalid user for WSGI daemon process."; user = value; uid = ap_uname2id(user); if (uid == 0) return "WSGI process blocked from running as root."; if (*user == ‘#’) { struct passwd *entry = NULL; if ((entry = getpwuid(uid)) == NULL) return "Couldn’t determine user name from uid."; user = entry->pw_name; } } else if (!strcmp(option, “group”)) { if (!*value) return "Invalid group for WSGI daemon process."; group = value; gid = ap_gname2id(group); } else if (!strcmp(option, “supplementary-groups”)) { groups_list = value; } else if (!strcmp(option, “processes”)) { if (!*value) return "Invalid process count for WSGI daemon process."; processes = atoi(value); if (processes < 1) return "Invalid process count for WSGI daemon process."; multiprocess = 1; } else if (!strcmp(option, “threads”)) { if (!*value) return "Invalid thread count for WSGI daemon process."; threads = atoi(value); if (threads < 0 || threads >= WSGI_STACK_LAST-1) return "Invalid thread count for WSGI daemon process."; } else if (!strcmp(option, “umask”)) { if (!*value) return "Invalid umask for WSGI daemon process."; errno = 0; umask = strtol(value, (char **)&value, 8); if (*value || errno == ERANGE || umask < 0) return "Invalid umask for WSGI daemon process."; } else if (!strcmp(option, “chroot”)) { if (geteuid()) return "Cannot chroot WSGI daemon process when not root."; if (*value != ‘/’) return "Invalid chroot directory for WSGI daemon process."; root = value; } else if (!strcmp(option, “home”)) { if (*value != ‘/’) return "Invalid home directory for WSGI daemon process."; home = value; } else if (!strcmp(option, “lang”)) { lang = value; } else if (!strcmp(option, “locale”)) { locale = value; } else if (!strcmp(option, “python-home”)) { python_home = value; } else if (!strcmp(option, “python-path”)) { python_path = value; } else if (!strcmp(option, “python-eggs”)) { python_eggs = value; } #if (APR_MAJOR_VERSION >= 1) else if (!strcmp(option, “stack-size”)) { if (!*value) return "Invalid stack size for WSGI daemon process."; stack_size = atoi(value); if (stack_size <= 0) return "Invalid stack size for WSGI daemon process."; } #endif else if (!strcmp(option, “maximum-requests”)) { if (!*value) return "Invalid request count for WSGI daemon process."; maximum_requests = atoi(value); if (maximum_requests < 0) return "Invalid request count for WSGI daemon process."; } else if (!strcmp(option, “startup-timeout”)) { if (!*value) return "Invalid startup timeout for WSGI daemon process."; startup_timeout = atoi(value); if (startup_timeout < 0) return "Invalid startup timeout for WSGI daemon process."; } else if (!strcmp(option, “shutdown-timeout”)) { if (!*value) return "Invalid shutdown timeout for WSGI daemon process."; shutdown_timeout = atoi(value); if (shutdown_timeout < 0) return "Invalid shutdown timeout for WSGI daemon process."; } else if (!strcmp(option, “deadlock-timeout”)) { if (!*value) return "Invalid deadlock timeout for WSGI daemon process."; deadlock_timeout = atoi(value); if (deadlock_timeout < 0) return "Invalid deadlock timeout for WSGI daemon process."; } else if (!strcmp(option, “inactivity-timeout”)) { if (!*value) return "Invalid inactivity timeout for WSGI daemon process."; inactivity_timeout = atoi(value); if (inactivity_timeout < 0) return "Invalid inactivity timeout for WSGI daemon process."; } else if (!strcmp(option, “request-timeout”)) { if (!*value) return "Invalid request timeout for WSGI daemon process."; request_timeout = atoi(value); if (request_timeout < 0) return "Invalid request timeout for WSGI daemon process."; } else if (!strcmp(option, “graceful-timeout”)) { if (!*value) return "Invalid graceful timeout for WSGI daemon process."; graceful_timeout = atoi(value); if (graceful_timeout < 0) return "Invalid graceful timeout for WSGI daemon process."; } else if (!strcmp(option, “eviction-timeout”)) { if (!*value) return "Invalid eviction timeout for WSGI daemon process."; eviction_timeout = atoi(value); if (eviction_timeout < 0) return "Invalid eviction timeout for WSGI daemon process."; } else if (!strcmp(option, “restart-interval”)) { if (!*value) return "Invalid restart interval for WSGI daemon process."; restart_interval = atoi(value); if (restart_interval < 0) return "Invalid restart interval for WSGI daemon process."; } else if (!strcmp(option, “connect-timeout”)) { if (!*value) return "Invalid connect timeout for WSGI daemon process."; connect_timeout = atoi(value); if (connect_timeout < 0) return "Invalid connect timeout for WSGI daemon process."; } else if (!strcmp(option, “socket-timeout”)) { if (!*value) return "Invalid socket timeout for WSGI daemon process."; socket_timeout = atoi(value); if (socket_timeout < 0) return "Invalid socket timeout for WSGI daemon process."; } else if (!strcmp(option, “queue-timeout”)) { if (!*value) return "Invalid queue timeout for WSGI daemon process."; queue_timeout = atoi(value); if (queue_timeout < 0) return "Invalid queue timeout for WSGI daemon process."; } else if (!strcmp(option, “listen-backlog”)) { if (!*value) return "Invalid listen backlog for WSGI daemon process."; listen_backlog = atoi(value); if (listen_backlog < 0) return "Invalid listen backlog for WSGI daemon process."; } else if (!strcmp(option, “display-name”)) { display_name = value; } else if (!strcmp(option, “send-buffer-size”)) { if (!*value) return "Invalid send buffer size for WSGI daemon process."; send_buffer_size = atoi(value); if (send_buffer_size < 512 && send_buffer_size != 0) { return "Send buffer size must be >= 512 bytes, " "or 0 for system default."; } } else if (!strcmp(option, “receive-buffer-size”)) { if (!*value) return "Invalid receive buffer size for WSGI daemon process."; recv_buffer_size = atoi(value); if (recv_buffer_size < 512 && recv_buffer_size != 0) { return "Receive buffer size must be >= 512 bytes, " "or 0 for system default."; } } else if (!strcmp(option, “header-buffer-size”)) { if (!*value) return "Invalid header buffer size for WSGI daemon process."; header_buffer_size = atoi(value); if (header_buffer_size < 8192 && header_buffer_size != 0) { return "Header buffer size must be >= 8192 bytes, " "or 0 for default."; } } else if (!strcmp(option, “response-buffer-size”)) { if (!*value) return "Invalid response buffer size for WSGI daemon process."; response_buffer_size = atoi(value); if (response_buffer_size < 65536 && response_buffer_size != 0) { return "Response buffer size must be >= 65536 bytes, " "or 0 for default."; } } else if (!strcmp(option, “response-socket-timeout”)) { if (!*value) return "Invalid response socket timeout for WSGI daemon process."; response_socket_timeout = atoi(value); if (response_socket_timeout < 0) return "Invalid response socket timeout for WSGI daemon process."; } else if (!strcmp(option, “socket-user”)) { uid_t socket_uid; if (!*value) return "Invalid socket user for WSGI daemon process."; socket_uid = ap_uname2id(value); if (*value == ‘#’) { struct passwd *entry = NULL; if ((entry = getpwuid(socket_uid)) == NULL) return "Couldn’t determine user name from socket user."; value = entry->pw_name; } socket_user = value; } else if (!strcmp(option, “script-user”)) { uid_t script_uid; if (!*value) return "Invalid script user for WSGI daemon process."; script_uid = ap_uname2id(value); if (*value == ‘#’) { struct passwd *entry = NULL; if ((entry = getpwuid(script_uid)) == NULL) return "Couldn’t determine uid from script user."; value = entry->pw_name; } script_user = value; } else if (!strcmp(option, “script-group”)) { gid_t script_gid; if (!*value) return "Invalid script group for WSGI daemon process."; script_gid = ap_gname2id(value); if (*value == ‘#’) { struct group *entry = NULL; if ((entry = getgrgid(script_gid)) == NULL) return "Couldn’t determine gid from script group."; value = entry->gr_name; } script_group = value; } else if (!strcmp(option, “cpu-time-limit”)) { if (!*value) return "Invalid CPU time limit for WSGI daemon process."; cpu_time_limit = atoi(value); if (cpu_time_limit < 0) return "Invalid CPU time limit for WSGI daemon process."; } else if (!strcmp(option, “cpu-priority”)) { if (!*value) return "Invalid CPU priority for WSGI daemon process."; cpu_priority = atoi(value); } else if (!strcmp(option, “memory-limit”)) { if (!*value) return "Invalid memory limit for WSGI daemon process."; memory_limit = apr_atoi64(value); if (memory_limit < 0) return "Invalid memory limit for WSGI daemon process."; } else if (!strcmp(option, “virtual-memory-limit”)) { if (!*value) return "Invalid virtual memory limit for WSGI daemon process."; virtual_memory_limit = apr_atoi64(value); if (virtual_memory_limit < 0) return "Invalid virtual memory limit for WSGI daemon process."; } else if (!strcmp(option, “server-metrics”)) { if (!*value) return "Invalid server metrics flag for WSGI daemon process."; if (strcasecmp(value, “Off”) == 0) server_metrics = 0; else if (strcasecmp(value, “On”) == 0) server_metrics = 1; else return "Invalid server metrics flag for WSGI daemon process."; } else if (!strcmp(option, “newrelic-config-file”)) { newrelic_config_file = value; } else if (!strcmp(option, “newrelic-environment”)) { newrelic_environment = value; } else return "Invalid option to WSGI daemon process definition."; } if (script_user && script_group) return "Only one of script-user and script-group allowed."; if (groups_list) { const char *group_name = NULL; long groups_maximum = NGROUPS_MAX; const char *items = NULL; #ifdef _SC_NGROUPS_MAX groups_maximum = sysconf(_SC_NGROUPS_MAX); if (groups_maximum < 0) groups_maximum = NGROUPS_MAX; #endif groups = (gid_t *)apr_pcalloc(cmd->pool, groups_maximum*sizeof(groups[0])); groups[groups_count++] = gid; items = groups_list; group_name = ap_getword(cmd->pool, &items, ‘,’); while (group_name && *group_name) { if (groups_count >= groups_maximum) return "Too many supplementary groups WSGI daemon process"; groups[groups_count++] = ap_gname2id(group_name); group_name = ap_getword(cmd->pool, &items, ‘,’); } } if (!wsgi_daemon_list) { wsgi_daemon_list = apr_array_make(cmd->pool, 20, sizeof(WSGIProcessGroup)); apr_pool_cleanup_register(cmd->pool, &wsgi_daemon_list, ap_pool_cleanup_set_null, apr_pool_cleanup_null); } entries = (WSGIProcessGroup *)wsgi_daemon_list->elts; for (i = 0; i < wsgi_daemon_list->nelts; ++i) { entry = &entries[i]; if (!strcmp(entry->name, name)) return "Name duplicates previous WSGI daemon definition."; } wsgi_daemon_count++; entry = (WSGIProcessGroup *)apr_array_push(wsgi_daemon_list); entry->server = cmd->server; entry->random = random(); entry->id = wsgi_daemon_count; entry->name = apr_pstrdup(cmd->pool, name); entry->user = apr_pstrdup(cmd->pool, user); entry->group = apr_pstrdup(cmd->pool, group); entry->uid = uid; entry->gid = gid; entry->groups_list = groups_list; entry->groups_count = groups_count; entry->groups = groups; entry->processes = processes; entry->multiprocess = multiprocess; entry->threads = threads; entry->umask = umask; entry->root = root; entry->home = home; entry->lang = lang; entry->locale = locale; entry->python_home = python_home; entry->python_path = python_path; entry->python_eggs = python_eggs; entry->stack_size = stack_size; entry->maximum_requests = maximum_requests; entry->shutdown_timeout = shutdown_timeout; entry->startup_timeout = apr_time_from_sec(startup_timeout); entry->deadlock_timeout = apr_time_from_sec(deadlock_timeout); entry->inactivity_timeout = apr_time_from_sec(inactivity_timeout); entry->request_timeout = apr_time_from_sec(request_timeout); entry->graceful_timeout = apr_time_from_sec(graceful_timeout); entry->eviction_timeout = apr_time_from_sec(eviction_timeout); entry->restart_interval = apr_time_from_sec(restart_interval); entry->connect_timeout = apr_time_from_sec(connect_timeout); entry->socket_timeout = apr_time_from_sec(socket_timeout); entry->queue_timeout = apr_time_from_sec(queue_timeout); entry->socket_user = apr_pstrdup(cmd->pool, socket_user); entry->listen_backlog = listen_backlog; entry->display_name = display_name; entry->send_buffer_size = send_buffer_size; entry->recv_buffer_size = recv_buffer_size; entry->header_buffer_size = header_buffer_size; entry->response_buffer_size = response_buffer_size; if (response_socket_timeout == 0) response_socket_timeout = socket_timeout; entry->response_socket_timeout = apr_time_from_sec(response_socket_timeout); entry->script_user = script_user; entry->script_group = script_group; entry->cpu_time_limit = cpu_time_limit; entry->cpu_priority = cpu_priority; entry->memory_limit = memory_limit; entry->virtual_memory_limit = virtual_memory_limit; entry->server_metrics = server_metrics; entry->newrelic_config_file = newrelic_config_file; entry->newrelic_environment = newrelic_environment; entry->listener_fd = -1; return NULL; } static const char *wsgi_set_socket_prefix(cmd_parms *cmd, void *mconfig, const char *arg) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); sconfig->socket_prefix = ap_server_root_relative(cmd->pool, arg); if (!sconfig->socket_prefix) { return apr_pstrcat(cmd->pool, "Invalid WSGISocketPrefix '", arg, "’.", NULL); } return NULL; } static const char *wsgi_set_socket_rotation(cmd_parms *cmd, void *mconfig, const char *f) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); if (strcasecmp(f, “Off”) == 0) sconfig->socket_rotation = 0; else if (strcasecmp(f, “On”) == 0) sconfig->socket_rotation = 1; else return "WSGISocketRotation must be one of: Off | On"; return NULL; } static const char wsgi_valid_accept_mutex_string[] = “Valid accept mutex mechanisms for this platform are: default” #if APR_HAS_FLOCK_SERIALIZE “, flock” #endif #if APR_HAS_FCNTL_SERIALIZE “, fcntl” #endif #if APR_HAS_SYSVSEM_SERIALIZE “, sysvsem” #endif #if APR_HAS_POSIXSEM_SERIALIZE “, posixsem” #endif #if APR_HAS_PROC_PTHREAD_SERIALIZE “, pthread” #endif "."; static const char *wsgi_set_accept_mutex(cmd_parms *cmd, void *mconfig, const char *arg) { const char *error = NULL; WSGIServerConfig *sconfig = NULL; error = ap_check_cmd_context(cmd, GLOBAL_ONLY); if (error != NULL) return error; sconfig = ap_get_module_config(cmd->server->module_config, &wsgi_module); #if !defined(AP_ACCEPT_MUTEX_TYPE) sconfig->lock_mechanism = ap_accept_lock_mech; #else sconfig->lock_mechanism = APR_LOCK_DEFAULT; #endif if (!strcasecmp(arg, “default”)) { sconfig->lock_mechanism = APR_LOCK_DEFAULT; } #if APR_HAS_FLOCK_SERIALIZE else if (!strcasecmp(arg, “flock”)) { sconfig->lock_mechanism = APR_LOCK_FLOCK; } #endif #if APR_HAS_FCNTL_SERIALIZE else if (!strcasecmp(arg, “fcntl”)) { sconfig->lock_mechanism = APR_LOCK_FCNTL; } #endif #if APR_HAS_SYSVSEM_SERIALIZE else if (!strcasecmp(arg, “sysvsem”)) { sconfig->lock_mechanism = APR_LOCK_SYSVSEM; } #endif #if APR_HAS_POSIXSEM_SERIALIZE else if (!strcasecmp(arg, “posixsem”)) { sconfig->lock_mechanism = APR_LOCK_POSIXSEM; } #endif #if APR_HAS_PROC_PTHREAD_SERIALIZE else if (!strcasecmp(arg, “pthread”)) { sconfig->lock_mechanism = APR_LOCK_PROC_PTHREAD; } #endif else { return apr_pstrcat(cmd->pool, "Accept mutex lock mechanism ‘", arg, "’ is invalid. ", wsgi_valid_accept_mutex_string, NULL); } return NULL; } static apr_file_t *wsgi_signal_pipe_in = NULL; static apr_file_t *wsgi_signal_pipe_out = NULL; static void wsgi_signal_handler(int signum) { apr_size_t nbytes = 1; if (wsgi_daemon_pid != 0 && wsgi_daemon_pid != getpid()) exit(-1); if (signum == AP_SIG_GRACEFUL) { apr_file_write(wsgi_signal_pipe_out, "G", &nbytes); apr_file_flush(wsgi_signal_pipe_out); } else if (signum == SIGXCPU) { if (!wsgi_graceful_timeout) wsgi_daemon_shutdown++; apr_file_write(wsgi_signal_pipe_out, "C", &nbytes); apr_file_flush(wsgi_signal_pipe_out); } else { wsgi_daemon_shutdown++; apr_file_write(wsgi_signal_pipe_out, "S", &nbytes); apr_file_flush(wsgi_signal_pipe_out); } } static void wsgi_exit_daemon_process(int status) { if (wsgi_server && wsgi_daemon_group) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Exiting process '%s’.", getpid(), wsgi_daemon_group); } exit(status); } static int wsgi_start_process(apr_pool_t *p, WSGIDaemonProcess *daemon); static void wsgi_manage_process(int reason, void *data, apr_wait_t status) { WSGIDaemonProcess *daemon = data; switch (reason) { /* Child daemon process has died. */ case APR_OC_REASON_DEATH: { int mpm_state; int stopping; /* * Determine if Apache is being shutdown or not and * if it is not being shutdown, we will need to * restart the child daemon process that has died. * If MPM doesn’t support query assume that child * daemon process shouldn’t be restarted. Both * prefork and worker MPMs support this query so * should always be okay. */ stopping = 1; if (ap_mpm_query(AP_MPMQ_MPM_STATE, &mpm_state) == APR_SUCCESS && mpm_state != AP_MPMQ_STOPPING) { stopping = 0; } if (!stopping) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): " "Process ‘%s’ has died, deregister and " "restart it.", daemon->process.pid, daemon->group->name); if (WIFEXITED(status)) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): " "Process ‘%s’ terminated normally, exit code %d", daemon->process.pid, daemon->group->name, WEXITSTATUS(status)); } else if (WIFSIGNALED(status)) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): " "Process ‘%s’ terminated by signal %d", daemon->process.pid, daemon->group->name, WTERMSIG(status)); } } else { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): " "Process ‘%s’ has died but server is " "being stopped, deregister it.", daemon->process.pid, daemon->group->name); } /* Deregister existing process so we stop watching it. */ apr_proc_other_child_unregister(daemon); /* Now restart process if not shutting down. */ if (!stopping) wsgi_start_process(wsgi_parent_pool, daemon); break; } /* Apache is being restarted or shutdown. */ case APR_OC_REASON_RESTART: { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): " "Process ‘%s’ to be deregistered, as server is " "restarting or being shutdown.", daemon->process.pid, daemon->group->name); /* Deregister existing process so we stop watching it. */ apr_proc_other_child_unregister(daemon); break; } /* Child daemon process vanished. */ case APR_OC_REASON_LOST: { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): " "Process ‘%s’ appears to have been lost, " "deregister and restart it.", daemon->process.pid, daemon->group->name); /* Deregister existing process so we stop watching it. */ apr_proc_other_child_unregister(daemon); /* Restart the child daemon process that has died. */ wsgi_start_process(wsgi_parent_pool, daemon); break; } /* Call to unregister the process. */ case APR_OC_REASON_UNREGISTER: { /* Nothing to do at present. */ ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): " "Process ‘%s’ has been deregistered and will " "no longer be monitored.", daemon->process.pid, daemon->group->name); break; } default: { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): " "Process ‘%s’ targeted by unexpected event %d.", daemon->process.pid, daemon->group->name, reason); } } } static void wsgi_setup_daemon_name(WSGIDaemonProcess *daemon, apr_pool_t *p) { const char *display_name = NULL; #if !(defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)) long slen = 0; long dlen = 0; char *argv0 = NULL; #endif display_name = daemon->group->display_name; if (!display_name) return; if (!strcmp(display_name, “%{GROUP}”)) { display_name = apr_pstrcat(p, "(wsgi:", daemon->group->name, ")", NULL); } /* * Only argv[0] is guaranteed to be the real things as MPM * modules may make modifications to subsequent arguments. * Thus can only replace the argv[0] value. Because length * is restricted, need to truncate display name if too long. */ #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) setproctitle("%s", display_name); #else argv0 = (char*)wsgi_server->process->argv[0]; dlen = strlen(argv0); slen = strlen(display_name); memset(argv0, ' ', dlen); if (slen < dlen) memcpy(argv0, display_name, slen); else memcpy(argv0, display_name, dlen); #endif } static int wsgi_setup_access(WSGIDaemonProcess *daemon) { /* Change to chroot environment. */ if (daemon->group->root) { if (chroot(daemon->group->root) == -1) { ap_log_error(APLOG_MARK, APLOG_ALERT, errno, wsgi_server, "mod_wsgi (pid=%d): Unable to change root " "directory to '%s’.", getpid(), daemon->group->root); return -1; } } /* We don’t need to switch user/group if not root. */ if (geteuid() == 0) { /* Setup the daemon process real and effective group. */ if (setgid(daemon->group->gid) == -1) { ap_log_error(APLOG_MARK, APLOG_ALERT, errno, wsgi_server, "mod_wsgi (pid=%d): Unable to set group id " "to gid=%u.", getpid(), (unsigned)daemon->group->gid); return -1; } else { if (daemon->group->groups) { if (setgroups(daemon->group->groups_count, daemon->group->groups) == -1) { ap_log_error(APLOG_MARK, APLOG_ALERT, errno, wsgi_server, "mod_wsgi (pid=%d): Unable " "to set supplementary groups for uname=%s " "of '%s’.", getpid(), daemon->group->user, daemon->group->groups_list); return -1; } } else if (initgroups(daemon->group->user, daemon->group->gid) == -1) { ap_log_error(APLOG_MARK, APLOG_ALERT, errno, wsgi_server, "mod_wsgi (pid=%d): Unable " "to set groups for uname=%s and gid=%u.", getpid(), daemon->group->user, (unsigned)daemon->group->gid); return -1; } } /* Setup the daemon process real and effective user. */ if (setuid(daemon->group->uid) == -1) { ap_log_error(APLOG_MARK, APLOG_ALERT, errno, wsgi_server, "mod_wsgi (pid=%d): Unable to change to uid=%ld.", getpid(), (long)daemon->group->uid); /* * On true UNIX systems this should always succeed at * this point. With certain Linux kernel versions though * we can get back EAGAIN where the target user had * reached their process limit. In that case will be left * running as wrong user. Just exit on all failures to be * safe. Don’t die immediately to avoid a fork bomb. * * We could just return -1 here and let the caller do the * sleep() and exit() but this failure is critical enough * that we still do it here so it is obvious that the issue * is being addressed. */ ap_log_error(APLOG_MARK, APLOG_ALERT, 0, wsgi_server, "mod_wsgi (pid=%d): Failure to configure the " "daemon process correctly and process left in " "unspecified state. Restarting daemon process " "after delay.", getpid()); sleep(20); wsgi_exit_daemon_process(-1); return -1; } } /* * Setup the working directory for the process. It is either set to * what the ‘home’ option explicitly provides, or the home home * directory of the user, where it has been set to be different to * the user that Apache’s own processes run as. */ if (daemon->group->home) { if (chdir(daemon->group->home) == -1) { ap_log_error(APLOG_MARK, APLOG_ALERT, errno, wsgi_server, "mod_wsgi (pid=%d): Unable to change working " "directory to '%s’.", getpid(), daemon->group->home); return -1; } } else if (geteuid() != ap_unixd_config.user_id) { struct passwd *pwent; pwent = getpwuid(geteuid()); if (pwent) { if (chdir(pwent->pw_dir) == -1) { ap_log_error(APLOG_MARK, APLOG_ALERT, errno, wsgi_server, "mod_wsgi (pid=%d): Unable to change working " "directory to home directory ‘%s’ for uid=%ld.", getpid(), pwent->pw_dir, (long)geteuid()); return -1; } } else { ap_log_error(APLOG_MARK, APLOG_ALERT, errno, wsgi_server, "mod_wsgi (pid=%d): Unable to determine home " "directory for uid=%ld.", getpid(), (long)geteuid()); return -1; } } /* Setup the umask for the effective user. */ if (daemon->group->umask != -1) umask(daemon->group->umask); /* * Linux prevents generation of core dumps after setuid() * has been used. Attempt to reenable ability to dump core * so that the CoreDumpDirectory directive still works. */ #if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE) /* This applies to Linux 2.4 and later. */ if (ap_coredumpdir_configured) { if (prctl(PR_SET_DUMPABLE, 1)) { ap_log_error(APLOG_MARK, APLOG_ALERT, errno, wsgi_server, "mod_wsgi (pid=%d): Set dumpable failed. This child " "will not coredump after software errors.", getpid()); } } #endif return 0; } static int wsgi_setup_socket(WSGIProcessGroup *process) { int sockfd = -1; struct sockaddr_un addr; mode_t omask; int rc; int sendsz = process->send_buffer_size; int recvsz = process->recv_buffer_size; ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Socket for ‘%s’ is '%s’.", getpid(), process->name, process->socket_path); if ((sockfd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) { ap_log_error(APLOG_MARK, APLOG_ALERT, errno, wsgi_server, "mod_wsgi (pid=%d): Couldn’t create unix domain " "socket.", getpid()); return -1; } #ifdef SO_SNDBUF if (sendsz) { if (setsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, (void *)&sendsz, sizeof(sendsz)) == -1) { ap_log_error(APLOG_MARK, APLOG_WARNING, errno, wsgi_server, "mod_wsgi (pid=%d): Failed to set send buffer " "size on daemon process socket.", getpid()); } } #endif #ifdef SO_RCVBUF if (recvsz) { if (setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, (void *)&recvsz, sizeof(recvsz)) == -1) { ap_log_error(APLOG_MARK, APLOG_WARNING, errno, wsgi_server, "mod_wsgi (pid=%d): Failed to set receive buffer " "size on daemon process socket.", getpid()); } } #endif if (strlen(process->socket_path) > sizeof(addr.sun_path)) { ap_log_error(APLOG_MARK, APLOG_ALERT, 0, wsgi_server, "mod_wsgi (pid=%d): Length of path for daemon process " "socket exceeds maxmimum allowed value and will be " "truncated, resulting in likely failure to bind the " "socket, or other later related failure.", getpid()); } memset(&addr, 0, sizeof(addr)); addr.sun_family = AF_UNIX; apr_cpystrn(addr.sun_path, process->socket_path, sizeof(addr.sun_path)); omask = umask(0077); rc = bind(sockfd, (struct sockaddr *)&addr, sizeof(addr)); if (rc < 0 && errno == EADDRINUSE) { ap_log_error(APLOG_MARK, APLOG_WARNING, errno, wsgi_server, "mod_wsgi (pid=%d): Removing stale unix domain " "socket '%s’.", getpid(), process->socket_path); unlink(process->socket_path); rc = bind(sockfd, (struct sockaddr *)&addr, sizeof(addr)); } umask(omask); if (rc < 0) { ap_log_error(APLOG_MARK, APLOG_ALERT, errno, wsgi_server, "mod_wsgi (pid=%d): Couldn’t bind unix domain " "socket '%s’.", getpid(), process->socket_path); close(sockfd); return -1; } ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Listen backlog for socket ‘%s’ is '%d’.", getpid(), process->socket_path, process->listen_backlog); if (listen(sockfd, process->listen_backlog) < 0) { ap_log_error(APLOG_MARK, APLOG_ALERT, errno, wsgi_server, "mod_wsgi (pid=%d): Couldn’t listen on unix domain " "socket.", getpid()); close(sockfd); return -1; } /* * Set the ownership of the UNIX listener socket. This would * normally be the Apache user that the Apache server child * processes run as, as they are the only processes that * would connect to the sockets. In the case of ITK MPM, * having them owned by Apache user is useless as at the * time the request is to be proxied, the Apache server * child process will have uid corresponding to the user * whose request they are handling. For ITK, thus set the * ownership to be the same as the daemon processes. This is * still restrictive, in that can only connect to daemon * process group running under same user, but most of the * time that is what you would want anyway when using ITK * MPM. */ if (!geteuid()) { #if defined(MPM_ITK) || defined(ITK_MPM) uid_t socket_uid = process->uid; #else uid_t socket_uid = ap_unixd_config.user_id; #endif if (process->socket_user) socket_uid = ap_uname2id(process->socket_user); if (chown(process->socket_path, socket_uid, -1) < 0) { ap_log_error(APLOG_MARK, APLOG_ALERT, errno, wsgi_server, "mod_wsgi (pid=%d): Couldn’t change owner of unix " "domain socket ‘%s’ to uid=%ld.", getpid(), process->socket_path, (long)socket_uid); close(sockfd); return -1; } } return sockfd; } static int wsgi_hook_daemon_handler(conn_rec *c); static void wsgi_process_socket(apr_pool_t *p, apr_socket_t *sock, apr_bucket_alloc_t *bucket_alloc, WSGIDaemonProcess *daemon) { apr_status_t rv; conn_rec *c; ap_sb_handle_t *sbh; core_net_rec *net; /* * This duplicates Apache connection setup. This is done * here rather than letting Apache do it so that avoid the * possibility that any Apache modules, such as mod_ssl * will add their own input/output filters to the chain. */ #if AP_MODULE_MAGIC_AT_LEAST(20110619,0) /* For 2.4 a NULL sbh pointer should work. */ sbh = NULL; #else /* For 2.2 a dummy sbh pointer is needed. */ ap_create_sb_handle(&sbh, p, -1, 0); #endif c = (conn_rec *)apr_pcalloc(p, sizeof(conn_rec)); c->sbh = sbh; c->conn_config = ap_create_conn_config§; c->notes = apr_table_make(p, 5); c->pool = p; if ((rv = apr_socket_addr_get(&c->local_addr, APR_LOCAL, sock)) != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_INFO, rv, wsgi_server, "mod_wsgi (pid=%d): Failed call " "apr_socket_addr_get(APR_LOCAL).", getpid()); apr_socket_close(sock); return; } apr_sockaddr_ip_get(&c->local_ip, c->local_addr); #if AP_MODULE_MAGIC_AT_LEAST(20111130,0) if ((rv = apr_socket_addr_get(&c->client_addr, APR_REMOTE, sock)) != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_INFO, rv, wsgi_server, "mod_wsgi (pid=%d): Failed call " "apr_socket_addr_get(APR_REMOTE).", getpid()); apr_socket_close(sock); return; } c->client_ip = "unknown"; #else if ((rv = apr_socket_addr_get(&c->remote_addr, APR_REMOTE, sock)) != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_INFO, rv, wsgi_server, "mod_wsgi (pid=%d): Failed call " "apr_socket_addr_get(APR_REMOTE).", getpid()); apr_socket_close(sock); return; } c->remote_ip = "unknown"; #endif c->base_server = daemon->group->server; c->bucket_alloc = bucket_alloc; c->id = 1; net = apr_palloc(c->pool, sizeof(core_net_rec)); if (daemon->group->socket_timeout) rv = apr_socket_timeout_set(sock, daemon->group->socket_timeout); else rv = apr_socket_timeout_set(sock, c->base_server->timeout); if (rv != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, wsgi_server, "mod_wsgi (pid=%d): Failed call " "apr_socket_timeout_set().", getpid()); } net->c = c; net->in_ctx = NULL; net->out_ctx = NULL; net->client_socket = sock; ap_set_module_config(net->c->conn_config, &core_module, sock); ap_add_input_filter_handle(ap_core_input_filter_handle, net, NULL, net->c); ap_add_output_filter_handle(ap_core_output_filter_handle, net, NULL, net->c); wsgi_hook_daemon_handler©; ap_lingering_close©; } static apr_status_t wsgi_worker_acquire(int id) { WSGIThreadStack *stack = wsgi_worker_stack; WSGIDaemonThread *thread = &wsgi_worker_threads[id]; while (1) { apr_uint32_t state = stack->state; if (state & (WSGI_STACK_TERMINATED | WSGI_STACK_NO_LISTENER)) { if (state & WSGI_STACK_TERMINATED) { return APR_EINVAL; } if (apr_atomic_cas32(&(stack->state), WSGI_STACK_LAST, state) != state) { continue; } else { return APR_SUCCESS; } } thread->next = state; if (apr_atomic_cas32(&(stack->state), (unsigned)id, state) != state) { continue; } else { apr_status_t rv; if (thread->wakeup) { thread->wakeup = 0; return APR_SUCCESS; } rv = apr_thread_cond_wait(thread->condition, thread->mutex); while (rv == APR_SUCCESS && !thread->wakeup) rv = apr_thread_cond_wait(thread->condition, thread->mutex); if (rv != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_CRIT, rv, wsgi_server, "mod_wsgi (pid=%d): " "Wait on thread %d wakeup condition variable " "failed.", getpid(), id); } thread->wakeup = 0; return rv; } } } static apr_status_t wsgi_worker_release(void) { WSGIThreadStack *stack = wsgi_worker_stack; while (1) { apr_uint32_t state = stack->state; unsigned int first = state & WSGI_STACK_HEAD; if (first == WSGI_STACK_LAST) { if (apr_atomic_cas32(&(stack->state), state | WSGI_STACK_NO_LISTENER, state) != state) { continue; } else { return APR_SUCCESS; } } else { WSGIDaemonThread *thread = &wsgi_worker_threads[first]; if (apr_atomic_cas32(&(stack->state), (state ^ first) | thread->next, state) != state) { continue; } else { /* * Flag that thread should be woken up and then * signal it via the condition variable. */ apr_status_t rv; if ((rv = apr_thread_mutex_lock(thread->mutex)) != APR_SUCCESS) { return rv; } thread->wakeup = 1; if ((rv = apr_thread_mutex_unlock(thread->mutex)) != APR_SUCCESS) { return rv; } return apr_thread_cond_signal(thread->condition); } } } } static apr_status_t wsgi_worker_shutdown(void) { int i; apr_status_t rv; WSGIThreadStack *stack = wsgi_worker_stack; while (1) { apr_uint32_t state = stack->state; if (apr_atomic_cas32(&(stack->state), state | WSGI_STACK_TERMINATED, state) == state) { break; } } for (i = 0; i < wsgi_daemon_process->group->threads; i++) { if ((rv = wsgi_worker_release()) != APR_SUCCESS) { return rv; } } return APR_SUCCESS; } static void wsgi_daemon_worker(apr_pool_t *p, WSGIDaemonThread *thread) { apr_status_t status; apr_socket_t *socket; apr_pool_t *ptrans; apr_pollset_t *pollset; apr_pollfd_t pfd = { 0 }; apr_int32_t numdesc; const apr_pollfd_t *pdesc; apr_bucket_alloc_t *bucket_alloc; WSGIDaemonProcess *daemon = thread->process; WSGIProcessGroup *group = daemon->group; /* Loop until signal received to shutdown daemon process. */ while (!wsgi_daemon_shutdown) { apr_status_t rv; /* * Only allow one thread in this process to attempt to * acquire the global process lock as the global process * lock will actually allow all threads in this process * through once one in this process acquires lock. Only * allowing one means better chance of another process * subsequently getting it thereby distributing requests * across processes better and reducing chance of Python * GIL contention. */ wsgi_worker_acquire(thread->id); if (wsgi_daemon_shutdown) break; if (group->mutex) { /* * Grab the accept mutex across all daemon processes * in this process group. */ rv = apr_proc_mutex_lock(group->mutex); if (rv != APR_SUCCESS) { #if 0 #if defined(EIDRM) /* * When using multiple threads locking the * process accept mutex fails with an EIDRM when * process being shutdown but signal check * hasn’t triggered quick enough to set shutdown * flag. This causes lots of error messages to * be logged which make it look like something * nasty has happened even when it hasn’t. For * now assume that if multiple threads and EIDRM * occurs that it is okay and the process is * being shutdown. The condition should by * rights only occur when the Apache parent * process is being shutdown or has died for * some reason so daemon process would logically * therefore also be in process of being * shutdown or killed. */ if (!strcmp(apr_proc_mutex_name(group->mutex), “sysvsem”)) { if (errno == EIDRM && group->threads > 1) wsgi_daemon_shutdown = 1; } #endif #endif if (!wsgi_daemon_shutdown) { ap_log_error(APLOG_MARK, APLOG_CRIT, rv, wsgi_server, "mod_wsgi (pid=%d): " "Couldn’t acquire accept mutex '%s’. " "Shutting down daemon process.", getpid(), group->socket_path); wsgi_daemon_shutdown++; kill(getpid(), SIGTERM); sleep(5); } break; } /* * Daemon process being shutdown so don’t accept the * connection after all. */ if (wsgi_daemon_shutdown) { apr_proc_mutex_unlock(group->mutex); wsgi_worker_release(); break; } } apr_pool_create(&ptrans, p); /* * Accept socket connection from the child process. We * test the socket for whether it is ready before actually * performing the accept() so that can know for sure that * we will be processing a request and flag thread as * running. Only bother to do join with thread which is * actually running when process is being shutdown. */ apr_pollset_create(&pollset, 1, ptrans, 0); memset(&pfd, '\0’, sizeof(pfd)); pfd.desc_type = APR_POLL_SOCKET; pfd.desc.s = daemon->listener; pfd.reqevents = APR_POLLIN; pfd.client_data = daemon; apr_pollset_add(pollset, &pfd); rv = apr_pollset_poll(pollset, -1, &numdesc, &pdesc); if (rv != APR_SUCCESS && !APR_STATUS_IS_EINTR(rv)) { ap_log_error(APLOG_MARK, APLOG_CRIT, rv, wsgi_server, "mod_wsgi (pid=%d): " "Unable to poll daemon socket for '%s’. " "Shutting down daemon process.", getpid(), group->socket_path); wsgi_daemon_shutdown++; kill(getpid(), SIGTERM); sleep(5); break; } if (wsgi_daemon_shutdown) { if (group->mutex) apr_proc_mutex_unlock(group->mutex); wsgi_worker_release(); apr_pool_destroy(ptrans); break; } if (rv != APR_SUCCESS && APR_STATUS_IS_EINTR(rv)) { if (group->mutex) apr_proc_mutex_unlock(group->mutex); wsgi_worker_release(); apr_pool_destroy(ptrans); continue; } thread->running = 1; status = apr_socket_accept(&socket, daemon->listener, ptrans); if (group->mutex) { apr_status_t rv; rv = apr_proc_mutex_unlock(group->mutex); if (rv != APR_SUCCESS) { if (!wsgi_daemon_shutdown) { wsgi_worker_release(); ap_log_error(APLOG_MARK, APLOG_CRIT, rv, wsgi_server, "mod_wsgi (pid=%d): " "Couldn’t release accept mutex '%s’.", getpid(), group->socket_path); apr_pool_destroy(ptrans); thread->running = 0; break; } } } wsgi_worker_release(); if (status != APR_SUCCESS && APR_STATUS_IS_EINTR(status)) { apr_pool_destroy(ptrans); thread->running = 0; continue; } /* Process the request proxied from the child process. */ apr_thread_mutex_lock(wsgi_monitor_lock); thread->request = apr_time_now(); apr_thread_mutex_unlock(wsgi_monitor_lock); bucket_alloc = apr_bucket_alloc_create(ptrans); wsgi_process_socket(ptrans, socket, bucket_alloc, daemon); apr_thread_mutex_lock(wsgi_monitor_lock); thread->request = 0; apr_thread_mutex_unlock(wsgi_monitor_lock); /* Cleanup ready for next request. */ apr_pool_destroy(ptrans); thread->running = 0; /* Check to see if maximum number of requests reached. */ if (daemon->group->maximum_requests) { if (–wsgi_request_count <= 0) { if (wsgi_graceful_timeout && wsgi_active_requests) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Maximum requests " "reached, attempt a graceful shutdown " "’%s’.", getpid(), daemon->group->name); apr_thread_mutex_lock(wsgi_monitor_lock); wsgi_graceful_shutdown_time = apr_time_now(); wsgi_graceful_shutdown_time += wsgi_graceful_timeout; apr_thread_mutex_unlock(wsgi_monitor_lock); } else { if (!wsgi_daemon_shutdown) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Maximum requests " "reached, triggering immediate shutdown " "’%s’.", getpid(), daemon->group->name); } wsgi_daemon_shutdown++; kill(getpid(), SIGINT); } } } /* Check if graceful shutdown and no active requests. */ if (wsgi_daemon_graceful && !wsgi_daemon_shutdown) { if (wsgi_active_requests == 0) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Requests have completed, " "triggering immediate shutdown '%s’.", getpid(), daemon->group->name); wsgi_daemon_shutdown++; kill(getpid(), SIGINT); } } } if (wsgi_server_config->verbose_debugging) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Exiting thread %d in daemon " "process '%s’.", getpid(), thread->id, thread->process->group->name); } else { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Exiting thread %d in daemon " "process '%s’.", getpid(), thread->id, thread->process->group->name); } } static void *wsgi_daemon_thread(apr_thread_t *thd, void *data) { WSGIDaemonThread *thread = data; apr_pool_t *p = apr_thread_pool_get(thd); if (wsgi_server_config->verbose_debugging) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Started thread %d in daemon " "process '%s’.", getpid(), thread->id, thread->process->group->name); } else { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Started thread %d in daemon " "process '%s’.", getpid(), thread->id, thread->process->group->name); } apr_thread_mutex_lock(thread->mutex); wsgi_daemon_worker(p, thread); apr_thread_exit(thd, APR_SUCCESS); return NULL; } static void *wsgi_reaper_thread(apr_thread_t *thd, void *data) { WSGIDaemonProcess *daemon = data; sleep(daemon->group->shutdown_timeout); ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Aborting process '%s’.", getpid(), daemon->group->name); wsgi_exit_daemon_process(-1); return NULL; } static void *wsgi_deadlock_thread(apr_thread_t *thd, void *data) { WSGIDaemonProcess *daemon = data; PyGILState_STATE gilstate; if (wsgi_server_config->verbose_debugging) { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Enable deadlock thread in " "process '%s’.", getpid(), daemon->group->name); } apr_thread_mutex_lock(wsgi_monitor_lock); wsgi_deadlock_shutdown_time = apr_time_now(); wsgi_deadlock_shutdown_time += wsgi_deadlock_timeout; apr_thread_mutex_unlock(wsgi_monitor_lock); while (1) { apr_sleep(apr_time_from_sec(1)); apr_thread_mutex_lock(wsgi_shutdown_lock); if (!wsgi_daemon_shutdown) { gilstate = PyGILState_Ensure(); PyGILState_Release(gilstate); } apr_thread_mutex_unlock(wsgi_shutdown_lock); apr_thread_mutex_lock(wsgi_monitor_lock); wsgi_deadlock_shutdown_time = apr_time_now(); wsgi_deadlock_shutdown_time += wsgi_deadlock_timeout; apr_thread_mutex_unlock(wsgi_monitor_lock); } return NULL; } static void *wsgi_monitor_thread(apr_thread_t *thd, void *data) { WSGIDaemonProcess *daemon = data; WSGIProcessGroup *group = daemon->group; int restart = 0; if (wsgi_server_config->verbose_debugging) { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Enable monitor thread in " "process '%s’.", getpid(), group->name); ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Startup timeout is %d.", getpid(), (int)(apr_time_sec(wsgi_startup_timeout))); ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Deadlock timeout is %d.", getpid(), (int)(apr_time_sec(wsgi_deadlock_timeout))); ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Idle inactivity timeout is %d.", getpid(), (int)(apr_time_sec(wsgi_idle_timeout))); ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Request time limit is %d.", getpid(), (int)(apr_time_sec(wsgi_request_timeout))); ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Graceful timeout is %d.", getpid(), (int)(apr_time_sec(wsgi_graceful_timeout))); ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Eviction timeout is %d.", getpid(), (int)(apr_time_sec(wsgi_eviction_timeout))); ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Restart interval is %d.", getpid(), (int)(apr_time_sec(wsgi_restart_interval))); } /* * If a restart interval was specified then set up the time for * when the restart should occur. */ if (wsgi_restart_interval) { wsgi_restart_shutdown_time = apr_time_now(); wsgi_restart_shutdown_time += wsgi_restart_interval; } while (1) { apr_time_t now; apr_time_t startup_time; apr_time_t deadlock_time; apr_time_t idle_time; apr_time_t graceful_time; apr_time_t restart_time; apr_time_t request_time = 0; apr_interval_time_t period = 0; int i = 0; now = apr_time_now(); apr_thread_mutex_lock(wsgi_monitor_lock); startup_time = wsgi_startup_shutdown_time; deadlock_time = wsgi_deadlock_shutdown_time; idle_time = wsgi_idle_shutdown_time; graceful_time = wsgi_graceful_shutdown_time; restart_time = wsgi_restart_shutdown_time; if (wsgi_request_timeout && wsgi_worker_threads) { for (i = 0; i<wsgi_daemon_process->group->threads; i++) { if (wsgi_worker_threads[i].request) request_time += (now - wsgi_worker_threads[i].request); } } request_time /= wsgi_daemon_process->group->threads; apr_thread_mutex_unlock(wsgi_monitor_lock); if (!restart && wsgi_request_timeout) { if (request_time > wsgi_request_timeout) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Daemon process request " "time limit exceeded, stopping process " "’%s’.", getpid(), group->name); wsgi_shutdown_reason = "request_timeout"; wsgi_dump_stack_traces = 1; restart = 1; } } if (!restart && wsgi_startup_timeout) { if (startup_time > 0) { if (startup_time <= now) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Application startup " "timer expired, stopping process '%s’.", getpid(), group->name); wsgi_shutdown_reason = "startup_timeout"; restart = 1; } else { period = startup_time - now; } } } if (!restart && wsgi_restart_interval) { if (restart_time > 0) { if (restart_time <= now) { if (!wsgi_daemon_graceful) { if (wsgi_active_requests) { wsgi_daemon_graceful++; apr_thread_mutex_lock(wsgi_monitor_lock); wsgi_graceful_shutdown_time = apr_time_now(); wsgi_graceful_shutdown_time += wsgi_graceful_timeout; apr_thread_mutex_unlock(wsgi_monitor_lock); ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): " "Application restart timer expired, " "waiting for requests to complete " "’%s’.", getpid(), daemon->group->name); } else { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): " "Application restart timer expired, " "stopping process '%s’.", getpid(), daemon->group->name); wsgi_shutdown_reason = "restart_interval"; restart = 1; } } } else { if (!period || ((restart_time - now) < period)) period = restart_time - now; } } } if (!restart && wsgi_deadlock_timeout) { if (deadlock_time) { if (deadlock_time <= now) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Daemon process deadlock " "timer expired, stopping process '%s’.", getpid(), group->name); restart = 1; } else { if (!period || ((deadlock_time - now) < period)) period = deadlock_time - now; } } else { if (!period || (wsgi_deadlock_timeout < period)) period = wsgi_deadlock_timeout; } } if (!restart && wsgi_idle_timeout) { if (idle_time) { if (idle_time <= now) { if (wsgi_active_requests == 0) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Daemon process " "idle inactivity timer expired, " "stopping process '%s’.", getpid(), group->name); wsgi_shutdown_reason = "inactivity_timeout"; restart = 1; } else { /* Ignore for now as still have requests. */ if (!period || (wsgi_idle_timeout < period)) period = wsgi_idle_timeout; } } else { if (!period || ((idle_time - now) < period)) period = idle_time - now; } } else { if (!period || (wsgi_idle_timeout < period)) period = wsgi_idle_timeout; } } if (!restart && wsgi_graceful_timeout) { if (graceful_time) { if (graceful_time <= now) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Daemon process " "graceful timer expired '%s’.", getpid(), group->name); restart = 1; } else { if (!period || ((graceful_time - now) < period)) period = graceful_time - now; else if (wsgi_graceful_timeout < period) period = wsgi_graceful_timeout; } } else { if (!period || (wsgi_graceful_timeout < period)) period = wsgi_graceful_timeout; } } if (!restart && wsgi_eviction_timeout) { if (graceful_time) { if (graceful_time <= now) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Daemon process " "graceful timer expired '%s’.", getpid(), group->name); restart = 1; } else { if (!period || ((graceful_time - now) < period)) period = graceful_time - now; else if (wsgi_eviction_timeout < period) period = wsgi_eviction_timeout; } } else { if (!period || (wsgi_eviction_timeout < period)) period = wsgi_eviction_timeout; } } if (restart) { wsgi_daemon_shutdown++; kill(getpid(), SIGINT); } if (restart || wsgi_request_timeout || period <= 0 || (wsgi_startup_timeout && !wsgi_startup_shutdown_time)) { period = apr_time_from_sec(1); } apr_sleep(period); } return NULL; } #if (PY_MAJOR_VERSION >= 3) || (PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION >= 5) static void wsgi_log_stack_traces(void) { PyGILState_STATE state; PyObject *threads = NULL; /* * This should only be called on shutdown so don’t try and log * any errors, just dump them straight out. */ state = PyGILState_Ensure(); threads = _PyThread_CurrentFrames(); if (threads && PyDict_Size(threads) != 0) { PyObject *seq = NULL; seq = PyObject_GetIter(threads); if (seq) { PyObject *id = NULL; PyObject *frame = NULL; Py_ssize_t i = 0; ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Dumping stack trace for " "active Python threads.", getpid()); while (PyDict_Next(threads, &i, &id, &frame)) { apr_int64_t thread_id = 0; PyFrameObject *current = NULL; thread_id = PyLong_AsLong(id); current = (PyFrameObject *)frame; while (current) { int lineno; const char *filename = NULL; const char *name = NULL; #if PY_MAJOR_VERSION > 3 || (PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >= 9) lineno = PyFrame_GetLineNumber(current); #else if (current->f_trace) { lineno = current->f_lineno; } else { lineno = PyCode_Addr2Line(current->f_code, current->f_lasti); } #endif #if PY_MAJOR_VERSION >= 3 #if PY_MAJOR_VERSION > 3 || (PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >= 9) filename = PyUnicode_AsUTF8(PyFrame_GetCode(current)->co_filename); name = PyUnicode_AsUTF8(PyFrame_GetCode(current)->co_name); #else filename = PyUnicode_AsUTF8(current->f_code->co_filename); name = PyUnicode_AsUTF8(current->f_code->co_name); #endif #else filename = PyString_AsString(current->f_code->co_filename); name = PyString_AsString(current->f_code->co_name); #endif if (current == (PyFrameObject *)frame) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, “mod_wsgi (pid=%d): Thread %” APR_INT64_T_FMT " executing file \"%s\", line %d, in %s", getpid(), thread_id, filename, lineno, name); } else { #if PY_MAJOR_VERSION > 3 || (PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >= 9) if (PyFrame_GetBack(current)) { #else if (current->f_back) { #endif ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): called from file " "\"%s\", line %d, in %s,", getpid(), filename, lineno, name); } else { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): called from file " "\"%s\", line %d, in %s.", getpid(), filename, lineno, name); } } #if PY_MAJOR_VERSION > 3 || (PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >= 9) current = PyFrame_GetBack(current); #else current = current->f_back; #endif } } } else { ap_log_error(APLOG_MARK, APLOG_ERR, 0, wsgi_server, "mod_wsgi (pid=%d): Failed to iterate over " "current frames for active threads.", getpid()); PyErr_Print(); PyErr_Clear(); } } else { ap_log_error(APLOG_MARK, APLOG_ERR, 0, wsgi_server, "mod_wsgi (pid=%d): Failed to get current frames " "for active threads.", getpid()); PyErr_Print(); PyErr_Clear(); } Py_XDECREF(threads); PyGILState_Release(state); } #endif static void wsgi_daemon_main(apr_pool_t *p, WSGIDaemonProcess *daemon) { apr_threadattr_t *thread_attr; apr_thread_t *reaper = NULL; int i; apr_status_t rv; apr_status_t thread_rv; apr_pollfd_t poll_fd; apr_int32_t poll_count = 0; /* * Setup poll object for listening for shutdown notice from * signal handler. */ poll_fd.desc_type = APR_POLL_FILE; poll_fd.reqevents = APR_POLLIN; poll_fd.desc.f = wsgi_signal_pipe_in; /* Initialise maximum request count for daemon. */ if (daemon->group->maximum_requests) wsgi_request_count = daemon->group->maximum_requests; /* Ensure that threads are joinable. */ apr_threadattr_create(&thread_attr, p); apr_threadattr_detach_set(thread_attr, 0); #if (APR_MAJOR_VERSION >= 1) if (daemon->group->stack_size) { apr_threadattr_stacksize_set(thread_attr, daemon->group->stack_size); } #endif /* Start monitoring thread if required. */ wsgi_startup_timeout = daemon->group->startup_timeout; wsgi_deadlock_timeout = daemon->group->deadlock_timeout; wsgi_idle_timeout = daemon->group->inactivity_timeout; wsgi_request_timeout = daemon->group->request_timeout; wsgi_graceful_timeout = daemon->group->graceful_timeout; wsgi_eviction_timeout = daemon->group->eviction_timeout; wsgi_restart_interval = daemon->group->restart_interval; if (wsgi_deadlock_timeout || wsgi_idle_timeout) { rv = apr_thread_create(&reaper, thread_attr, wsgi_monitor_thread, daemon, p); if (rv != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_ALERT, rv, wsgi_server, "mod_wsgi (pid=%d): Couldn’t create monitor " "thread in daemon process '%s’.", getpid(), daemon->group->name); } } if (wsgi_deadlock_timeout) { if (rv != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_ALERT, rv, wsgi_server, "mod_wsgi (pid=%d): Couldn’t create deadlock " "thread in daemon process '%s’.", getpid(), daemon->group->name); } rv = apr_thread_create(&reaper, thread_attr, wsgi_deadlock_thread, daemon, p); } /* Initialise worker stack. */ wsgi_worker_stack = (WSGIThreadStack *)apr_palloc(p, sizeof(WSGIThreadStack)); wsgi_worker_stack->state = WSGI_STACK_NO_LISTENER | WSGI_STACK_LAST; /* Start the required number of threads. */ wsgi_worker_threads = (WSGIDaemonThread *)apr_pcalloc(p, daemon->group->threads * sizeof(WSGIDaemonThread)); if (wsgi_server_config->verbose_debugging) { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Starting %d threads in daemon " "process '%s’.", getpid(), daemon->group->threads, daemon->group->name); } for (i=0; i<daemon->group->threads; i++) { WSGIDaemonThread *thread = &wsgi_worker_threads[i]; if (wsgi_server_config->verbose_debugging) { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Starting thread %d in daemon " "process '%s’.", getpid(), i+1, daemon->group->name); } /* Create the mutex and condition variable for this thread. */ rv = apr_thread_cond_create(&thread->condition, p); if (rv != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_ALERT, rv, wsgi_server, "mod_wsgi (pid=%d): Couldn’t create worker " "thread %d state condition variable in daemon " "process '%s’.", getpid(), i, daemon->group->name); /* * Try to force an exit of the process if fail * to create the worker threads. */ kill(getpid(), SIGTERM); sleep(5); } rv = apr_thread_mutex_create(&thread->mutex, APR_THREAD_MUTEX_DEFAULT, p); if (rv != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_ALERT, rv, wsgi_server, "mod_wsgi (pid=%d): Couldn’t create worker " "thread %d state mutex variable in daemon " "process '%s’.", getpid(), i, daemon->group->name); /* * Try to force an exit of the process if fail * to create the worker threads. */ kill(getpid(), SIGTERM); sleep(5); } /* Now create the actual thread. */ thread->id = i; thread->process = daemon; thread->running = 0; thread->request = 0; rv = apr_thread_create(&thread->thread, thread_attr, wsgi_daemon_thread, thread, p); if (rv != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_ALERT, rv, wsgi_server, "mod_wsgi (pid=%d): Couldn’t create worker " "thread %d in daemon process '%s’.", getpid(), i, daemon->group->name); /* * Try to force an exit of the process if fail * to create the worker threads. */ kill(getpid(), SIGTERM); sleep(5); } } /* Block until we get a process shutdown signal. */ while (1) { char buf[1]; apr_size_t nbytes = 1; rv = apr_poll(&poll_fd, 1, &poll_count, -1); if (APR_STATUS_IS_EINTR(rv)) continue; rv = apr_file_read(wsgi_signal_pipe_in, buf, &nbytes); if (rv != APR_SUCCESS || nbytes != 1) { ap_log_error(APLOG_MARK, APLOG_ALERT, 0, wsgi_server, "mod_wsgi (pid=%d): Failed read on signal pipe '%s’.", getpid(), daemon->group->name); break; } if (buf[0] == ‘C’) { if (!wsgi_daemon_graceful) { wsgi_shutdown_reason = "cpu_time_limit"; if (wsgi_active_requests) { wsgi_daemon_graceful++; apr_thread_mutex_lock(wsgi_monitor_lock); wsgi_graceful_shutdown_time = apr_time_now(); wsgi_graceful_shutdown_time += wsgi_graceful_timeout; apr_thread_mutex_unlock(wsgi_monitor_lock); ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Exceeded CPU time " "limit, waiting for requests to complete " "’%s’.", getpid(), daemon->group->name); } else { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Exceeded CPU time " "limit, triggering immediate shutdown " "’%s’.", getpid(), daemon->group->name); wsgi_daemon_shutdown++; kill(getpid(), SIGINT); } } } else if (buf[0] == ‘G’) { if (!wsgi_daemon_graceful) { wsgi_shutdown_reason = "graceful_signal"; if (wsgi_active_requests) { wsgi_daemon_graceful++; apr_thread_mutex_lock(wsgi_monitor_lock); wsgi_graceful_shutdown_time = apr_time_now(); if (wsgi_eviction_timeout) wsgi_graceful_shutdown_time += wsgi_eviction_timeout; else wsgi_graceful_shutdown_time += wsgi_graceful_timeout; apr_thread_mutex_unlock(wsgi_monitor_lock); ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Process eviction " "requested, waiting for requests to complete " "’%s’.", getpid(), daemon->group->name); } else { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Process eviction " "requested, triggering immediate shutdown " "’%s’.", getpid(), daemon->group->name); wsgi_daemon_shutdown++; kill(getpid(), SIGINT); } } } else break; } ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Shutdown requested '%s’.", getpid(), daemon->group->name); /* * Create a reaper thread to abort process if graceful * shutdown takes too long. Not recommended to disable * this unless external process is controlling shutdown. */ if (daemon->group->shutdown_timeout) { rv = apr_thread_create(&reaper, thread_attr, wsgi_reaper_thread, daemon, p); if (rv != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_ALERT, rv, wsgi_server, "mod_wsgi (pid=%d): Couldn’t create reaper " "thread in daemon process '%s’.", getpid(), daemon->group->name); } } /* * If shutting down process due to reaching request time * limit, then try and dump out stack traces of any threads * which are running as a debugging aid. */ wsgi_publish_process_stopping(wsgi_shutdown_reason); #if (PY_MAJOR_VERSION >= 3) || (PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION >= 5) if (wsgi_dump_stack_traces) wsgi_log_stack_traces(); #endif /* * Attempt a graceful shutdown by waiting for any * threads which were processing a request at the time * of shutdown. In some respects this is a bit pointless * as even though we allow the requests to be completed, * the Apache child process which proxied the request * through to this daemon process could get killed off * before the daemon process and so the response gets * cut off or lost. */ wsgi_worker_shutdown(); for (i=0; i<daemon->group->threads; i++) { if (wsgi_worker_threads[i].thread && wsgi_worker_threads[i].running) { rv = apr_thread_join(&thread_rv, wsgi_worker_threads[i].thread); if (rv != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_CRIT, rv, wsgi_server, "mod_wsgi (pid=%d): Couldn’t join with " "worker thread %d in daemon process '%s’.", getpid(), i, daemon->group->name); } } } } static apr_status_t wsgi_cleanup_process(void *data) { WSGIProcessGroup *group = (WSGIProcessGroup *)data; /* Only do cleanup if in Apache parent process. */ if (wsgi_parent_pid != getpid()) return APR_SUCCESS; if (group->listener_fd != -1) { if (close(group->listener_fd) < 0) { ap_log_error(APLOG_MARK, APLOG_ERR, errno, wsgi_server, "mod_wsgi (pid=%d): " "Couldn’t close unix domain socket '%s’.", getpid(), group->socket_path); } if (unlink(group->socket_path) < 0 && errno != ENOENT) { ap_log_error(APLOG_MARK, APLOG_ERR, errno, wsgi_server, "mod_wsgi (pid=%d): " "Couldn’t unlink unix domain socket '%s’.", getpid(), group->socket_path); } } return APR_SUCCESS; } static int wsgi_start_process(apr_pool_t *p, WSGIDaemonProcess *daemon) { apr_status_t status; ap_listen_rec *lr; WSGIProcessGroup *entries = NULL; WSGIProcessGroup *entry = NULL; int i = 0; if ((status = apr_proc_fork(&daemon->process, p)) < 0) { ap_log_error(APLOG_MARK, APLOG_ALERT, errno, wsgi_server, "mod_wsgi: Couldn’t spawn process '%s’.", daemon->group->name); return DECLINED; } else if (status == APR_INCHILD) { if (!geteuid()) { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Starting process ‘%s’ with " "uid=%ld, gid=%u and threads=%d.", getpid(), daemon->group->name, (long)daemon->group->uid, (unsigned)daemon->group->gid, daemon->group->threads); } else { ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Starting process ‘%s’ with " "threads=%d.", getpid(), daemon->group->name, daemon->group->threads); } #ifdef HAVE_BINDPROCESSOR /* * By default, AIX binds to a single processor. This * bit unbinds children which will then bind to another * CPU. */ status = bindprocessor(BINDPROCESS, (int)getpid(), PROCESSOR_CLASS_ANY); if (status != OK) { ap_log_error(APLOG_MARK, APLOG_ERR, errno, wsgi_server, "mod_wsgi (pid=%d): Failed to unbind processor.", getpid()); } #endif /* Setup daemon process name displayed by 'ps’. */ wsgi_setup_daemon_name(daemon, p); /* Adjust CPU priority if overridden. */ if (daemon->group->cpu_priority != 0) { if (setpriority(PRIO_PROCESS, 0, daemon->group->cpu_priority) == -1) { ap_log_error(APLOG_MARK, APLOG_ERR, errno, wsgi_server, "mod_wsgi (pid=%d): Couldn’t set CPU priority " "in daemon process '%d’.", getpid(), daemon->group->cpu_priority); } } /* Setup daemon process user/group/umask etc. */ if (wsgi_setup_access(daemon) == -1) { /* * If we get any failure from setting up the appropriate * permissions or working directory for the daemon process * then we exit the process. Don’t die immediately to avoid * a fork bomb. */ ap_log_error(APLOG_MARK, APLOG_ALERT, 0, wsgi_server, "mod_wsgi (pid=%d): Failure to configure the " "daemon process correctly and process left in " "unspecified state. Restarting daemon process " "after delay.", getpid()); sleep(20); wsgi_exit_daemon_process(-1); } /* Reinitialise accept mutex in daemon process. */ if (daemon->group->mutex) { status = apr_proc_mutex_child_init(&daemon->group->mutex, daemon->group->mutex_path, p); if (status != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_CRIT, 0, wsgi_server, "mod_wsgi (pid=%d): Couldn’t initialise accept " "mutex in daemon process '%s’.", getpid(), daemon->group->mutex_path); /* Don’t die immediately to avoid a fork bomb. */ sleep(20); wsgi_exit_daemon_process(-1); } } /* * Create a lookup table of listener socket address * details so can use it later in daemon when trying * to map request to correct virtual host server. */ wsgi_daemon_listeners = apr_hash_make§; for (lr = ap_listeners; lr; lr = lr->next) { char *key; char *host; apr_port_t port; host = lr->bind_addr->hostname; port = lr->bind_addr->port; if (!host) host = ""; key = apr_psprintf(p, "%s|%d", host, port); apr_hash_set(wsgi_daemon_listeners, key, APR_HASH_KEY_STRING, lr->bind_addr); } /* * Close child copy of the listening sockets for the * Apache parent process so we don’t interfere with * the parent process. */ ap_close_listeners(); /* * Cleanup the Apache scoreboard to ensure that any * shared memory segments or memory mapped files not * available to code in daemon processes. */ /* * XXX If this is closed, under Apache 2.4 then daemon * mode processes will crash. Not much choice but to * leave it open. Daemon mode really needs to be * rewritten not to use normal Apache request object and * output bucket chain to avoid potential for problems. */ #if 0 ap_cleanup_scoreboard(0); #endif /* * Wipe out random value used in magic token so that not * possible for user code running in daemon process to * discover this value for other daemon process groups. * In other words, wipe out all but our own. */ entries = (WSGIProcessGroup *)wsgi_daemon_list->elts; for (i = 0; i < wsgi_daemon_list->nelts; ++i) { entry = &entries[i]; if (entry != daemon->group) entry->random = 0; } /* * Close listener socket for daemon processes for other * daemon process groups. In other words, close all but * our own. */ entries = (WSGIProcessGroup *)wsgi_daemon_list->elts; for (i = 0; i < wsgi_daemon_list->nelts; ++i) { entry = &entries[i]; if (entry != daemon->group && entry->listener_fd != -1) { close(entry->listener_fd); entry->listener_fd = -1; } } /* * Register signal handler to receive shutdown signal * from Apache parent process. We need to first create * pipe by which signal handler can notify the main * thread that signal has arrived indicating that * process needs to shutdown. */ status = apr_file_pipe_create(&wsgi_signal_pipe_in, &wsgi_signal_pipe_out, p); if (status != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_EMERG, status, wsgi_server, "mod_wsgi (pid=%d): Couldn’t initialise signal " "pipe in daemon process '%s’.", getpid(), daemon->group->name); /* Don’t die immediately to avoid a fork bomb. */ sleep(20); wsgi_exit_daemon_process(-1); } wsgi_daemon_shutdown = 0; wsgi_daemon_pid = getpid(); apr_signal(SIGINT, wsgi_signal_handler); apr_signal(SIGTERM, wsgi_signal_handler); apr_signal(AP_SIG_GRACEFUL, wsgi_signal_handler); #ifdef SIGXCPU apr_signal(SIGXCPU, wsgi_signal_handler); #endif /* Set limits on amount of CPU time that can be used. */ if (daemon->group->cpu_time_limit > 0) { struct rlimit limit; int result = -1; errno = ENOSYS; limit.rlim_cur = daemon->group->cpu_time_limit; limit.rlim_max = daemon->group->cpu_time_limit + 1; limit.rlim_max += daemon->group->shutdown_timeout; #if defined(RLIMIT_CPU) result = setrlimit(RLIMIT_CPU, &limit); #endif if (result == -1) { ap_log_error(APLOG_MARK, APLOG_CRIT, errno, wsgi_server, "mod_wsgi (pid=%d): Couldn’t set CPU time " "limit of %d seconds for process '%s’.", getpid(), daemon->group->cpu_time_limit, daemon->group->name); } } /* * Set limits on amount of date segment memory that can * be used. Although this is done, some platforms * doesn’t actually support it. */ if (daemon->group->memory_limit > 0) { struct rlimit limit; int result = -1; errno = ENOSYS; limit.rlim_cur = daemon->group->memory_limit; limit.rlim_max = daemon->group->memory_limit; #if defined(RLIMIT_DATA) result = setrlimit(RLIMIT_DATA, &limit); #endif if (result == -1) { ap_log_error(APLOG_MARK, APLOG_CRIT, errno, wsgi_server, "mod_wsgi (pid=%d): Couldn’t set memory " "limit of %ld for process '%s’.", getpid(), (long)daemon->group->memory_limit, daemon->group->name); } } /* * Set limits on amount of virtual memory that can be used. * Although this is done, some platforms doesn’t actually * support it. */ if (daemon->group->virtual_memory_limit > 0) { struct rlimit limit; int result = -1; errno = ENOSYS; limit.rlim_cur = daemon->group->virtual_memory_limit; limit.rlim_max = daemon->group->virtual_memory_limit; #if defined(RLIMIT_AS) result = setrlimit(RLIMIT_AS, &limit); #elif defined(RLIMIT_VMEM) result = setrlimit(RLIMIT_VMEM, &limit); #endif if (result == -1) { ap_log_error(APLOG_MARK, APLOG_CRIT, errno, wsgi_server, "mod_wsgi (pid=%d): Couldn’t set virtual memory " "limit of %ld for process '%s’.", getpid(), (long)daemon->group->virtual_memory_limit, daemon->group->name); } } /* * Flag whether multiple daemon processes or denoted * that requests could be spread across multiple daemon * process groups. */ wsgi_multiprocess = daemon->group->multiprocess; wsgi_multithread = daemon->group->threads != 1; /* * Create a pool for the child daemon process so * we can trigger various events off it at shutdown. */ apr_pool_create(&wsgi_daemon_pool, p); /* * Retain a reference to daemon process details. Do * this here as when doing lazy initialisation of * the interpreter we want to know if in a daemon * process so can pick any daemon process specific * home directory for Python installation. */ wsgi_daemon_group = daemon->group->name; wsgi_daemon_process = daemon; /* Set lang/locale if specified for daemon process. */ if (daemon->group->lang) { char *envvar; ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Setting lang to %s for " "daemon process group %s.", getpid(), daemon->group->lang, daemon->group->name); envvar = apr_pstrcat(p, "LANG=", daemon->group->lang, NULL); putenv(envvar); } if (daemon->group->locale) { char *envvar; char *result; ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Setting locale to %s for " "daemon process group %s.", getpid(), daemon->group->locale, daemon->group->name); envvar = apr_pstrcat(p, "LC_ALL=", daemon->group->locale, NULL); putenv(envvar); result = setlocale(LC_ALL, daemon->group->locale); if (!result) { ap_log_error(APLOG_MARK, APLOG_ERR, 0, wsgi_server, "mod_wsgi (pid=%d): Unsupported locale setting " "%s specified for daemon process group %s. " "Consider using ‘C.UTF-8’ as fallback setting.", getpid(), daemon->group->locale, daemon->group->name); } } /* Create lock for request monitoring. */ apr_thread_mutex_create(&wsgi_monitor_lock, APR_THREAD_MUTEX_UNNESTED, p); /* * Initialise Python if required to be done in the child * process. Note that it will not be initialised if * mod_python loaded and it has already been done. */ if (wsgi_python_after_fork) wsgi_python_init§; #if PY_MAJOR_VERSION < 3 /* * If mod_python is also being loaded and thus it was * responsible for initialising Python it can leave in * place an active thread state. Under normal conditions * this would be eliminated in Apache child process by * the time that mod_wsgi got to do its own child * initialisation but in daemon process we skip the * mod_python child initialisation so the active thread * state still exists. Thus need to do a bit of a fiddle * to ensure there is no active thread state. Don’t need * to worry about this with Python 3.X as mod_python * only supports Python 2.X. */ if (!wsgi_python_initialized) { PyGILState_STATE state; PyEval_AcquireLock(); state = PyGILState_Ensure(); PyGILState_Release(state); if (state == PyGILState_LOCKED) PyThreadState_Swap(NULL); PyEval_ReleaseLock(); } #endif /* * If the daemon is associated with a virtual host then * we can close all other error logs so long as they * aren’t the same one as being used for the virtual * host. If the virtual host error log is different to * the main server error log, then also tie stderr to * that log file instead. This way any debugging sent * direct to stderr from C code also goes to the virtual * host error log. We close the error logs that aren’t * required as that eliminates possibility that user * code executing in daemon process could maliciously * dump messages into error log for a different virtual * host, as well as stop them being reopened with mode * that would allow seeking back to start of file and * read any information in them. */ if (daemon->group->server->is_virtual) { server_rec *server = NULL; apr_file_t *errfile = NULL; /* * Iterate over all servers and close any error * logs different to that for virtual host. Note that * if errors are being redirected to syslog, then * the server error log reference will actually be * a null pointer, so need to ensure that check for * that and don’t attempt to close it in that case. */ server = wsgi_server; while (server != NULL) { if (server->error_log && server->error_log != daemon->group->server->error_log) { apr_file_close(server->error_log); } server = server->next; } /* * Reassociate stderr output with error log from the * virtual host the daemon is associated with. Close * the virtual host error log and point it at stderr * log instead. Do the latter so don’t get two * references to same open file. Just in case * anything still accesses error log of main server, * map main server error log to that of the virtual * host. Note that cant do this if errors are being * redirected to syslog, as indicated by virtual * host error log being a null pointer. In that case * just leave everything as it was. Also can’t remap * the error log for main server if it was being * redirected to syslog but virtual host wasn’t. */ if (daemon->group->server->error_log && daemon->group->server->error_log != wsgi_server->error_log) { apr_file_t *oldfile = NULL; apr_file_open_stderr(&errfile, wsgi_server->process->pool); apr_file_dup2(errfile, daemon->group->server->error_log, wsgi_server->process->pool); oldfile = daemon->group->server->error_log; server = wsgi_server; while (server != NULL) { if (server->error_log == oldfile) server->error_log = errfile; server = server->next; } apr_file_close(oldfile); if (wsgi_server->error_log) wsgi_server->error_log = errfile; } } /* * Update reference to server object in case daemon * process is actually associated with a virtual host. * This way all logging actually goes into the virtual * hosts log file. */ if (daemon->group->server) { if (wsgi_server_config->verbose_debugging) { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Process ‘%s’ logging to " "’%s’.", getpid(), daemon->group->name, daemon->group->server->server_hostname); } wsgi_server = daemon->group->server; } else { if (wsgi_server_config->verbose_debugging) { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Process ‘%s’ forced to log " "to '%s’.", getpid(), daemon->group->name, wsgi_server->server_hostname); } } /* Time daemon process started waiting for requests. */ wsgi_restart_time = apr_time_now(); /* * Setup Python in the child daemon process. Note that * we ensure that we are now marked as the original * initialiser of the Python interpreter even though * mod_python might have done it, as we will be the one * to cleanup the child daemon process and not * mod_python. We also need to perform the special * Python setup which has to be done after a fork. */ wsgi_python_initialized = 1; wsgi_python_path = daemon->group->python_path; wsgi_python_eggs = daemon->group->python_eggs; wsgi_newrelic_config_file = daemon->group->newrelic_config_file; wsgi_newrelic_environment = daemon->group->newrelic_environment; wsgi_python_child_init(wsgi_daemon_pool); /* * Create socket wrapper for listener file descriptor * and mutex for controlling which thread gets to * perform the accept() when a connection is ready. */ apr_os_sock_put(&daemon->listener, &daemon->group->listener_fd, p); /* * Run the main routine for the daemon process if there * is a non zero number of threads. When number of threads * is zero we actually go on and shutdown immediately. */ if (daemon->group->threads != 0) wsgi_daemon_main(p, daemon); /* * Destroy the pool for the daemon process. This will * have the side affect of also destroying Python. */ ap_log_error(APLOG_MARK, APLOG_INFO, 0, wsgi_server, "mod_wsgi (pid=%d): Stopping process ‘%s’.", getpid(), daemon->group->name); apr_pool_destroy(wsgi_daemon_pool); /* Exit the daemon process when being shutdown. */ wsgi_exit_daemon_process(0); } #ifdef HAVE_FORK if (wsgi_python_initialized) { #if PY_MAJOR_VERSION > 3 || (PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >= 7) #if 0 /* * XXX Appears to be wrong to call this at this point especially * since we haven’t acquired the GIL. It wouldn’t have been possible * for any user code to have registered a Python callback to run * in parent after fork either. Leave in code for now but disabled. */ PyOS_AfterFork_Parent(); #endif #endif } #endif apr_pool_note_subprocess(p, &daemon->process, APR_KILL_AFTER_TIMEOUT); apr_proc_other_child_register(&daemon->process, wsgi_manage_process, daemon, NULL, p); return OK; } static int wsgi_start_daemons(apr_pool_t *p) { WSGIProcessGroup *entries = NULL; WSGIProcessGroup *entry = NULL; WSGIDaemonProcess *process = NULL; int mpm_generation = 0; int i, j; /* Do we need to create any daemon processes. */ if (!wsgi_daemon_list) return OK; /* What server generation is this. */ #if defined(AP_MPMQ_GENERATION) ap_mpm_query(AP_MPMQ_GENERATION, &mpm_generation); #else mpm_generation = ap_my_generation; #endif /* * Cache references to root server and pool as will need * to access these when restarting daemon process when * they die. */ wsgi_parent_pool = p; /* * Startup in turn the required number of daemon processes * for each of the named process groups. */ wsgi_daemon_index = apr_hash_make§; entries = (WSGIProcessGroup *)wsgi_daemon_list->elts; for (i = 0; i < wsgi_daemon_list->nelts; ++i) { int status; entry = &entries[i]; /* * Check for whether the daemon process user and * group are the default Apache values. If they are * then reset them to the current values configured for * Apache. This is to work around where the User/Group * directives had not been set before the WSGIDaemonProcess * directive was used in configuration file. In this case, * where no ‘user’ and ‘group’ options were provided, * the default values would have been used, but these * were later overridden thus why we need to update it. */ if (entry->uid == ap_uname2id(DEFAULT_USER)) { entry->uid = ap_unixd_config.user_id; entry->user = ap_unixd_config.user_name; ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Reset default user for " "daemon process group ‘%s’ to uid=%ld.", getpid(), entry->name, (long)entry->uid); } if (entry->gid == ap_gname2id(DEFAULT_GROUP)) { entry->gid = ap_unixd_config.group_id; ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Reset default group for " "daemon process group ‘%s’ to gid=%ld.", getpid(), entry->name, (long)entry->gid); } /* * Calculate path for socket to accept requests on and * create the socket. */ entry->socket_rotation = wsgi_server_config->socket_rotation; if (entry->socket_rotation) { entry->socket_path = apr_psprintf(p, "%s.%d.%d.%d.sock", wsgi_server_config->socket_prefix, getpid(), mpm_generation, entry->id); } else { entry->socket_path = apr_psprintf(p, "%s.%d.u%d.%d.sock", wsgi_server_config->socket_prefix, getpid(), entry->uid, entry->id); } apr_hash_set(wsgi_daemon_index, entry->name, APR_HASH_KEY_STRING, entry); entry->listener_fd = wsgi_setup_socket(entry); if (entry->listener_fd == -1) return DECLINED; /* * Register cleanup so that listener socket is cleaned * up properly on a restart and on shutdown. */ apr_pool_cleanup_register(p, entry, wsgi_cleanup_process, apr_pool_cleanup_null); /* * If there is more than one daemon process in the group * then need to create an accept mutex for the daemon * processes to use so they don’t interfere with each * other. */ if (entry->processes > 1) { entry->mutex_path = apr_psprintf(p, "%s.%d.%d.%d.lock", wsgi_server_config->socket_prefix, getpid(), mpm_generation, entry->id); status = apr_proc_mutex_create(&entry->mutex, entry->mutex_path, wsgi_server_config->lock_mechanism, p); if (status != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_CRIT, errno, wsgi_server, "mod_wsgi (pid=%d): Couldn’t create accept " "lock ‘%s’ (%d).", getpid(), entry->mutex_path, wsgi_server_config->lock_mechanism); return DECLINED; } /* * Depending on the locking mechanism being used * need to change the permissions of the lock. Can’t * use unixd_set_proc_mutex_perms() as it uses the * default Apache child process uid/gid where the * daemon process uid/gid can be different. */ if (!geteuid()) { #if APR_HAS_SYSVSEM_SERIALIZE if (!strcmp(apr_proc_mutex_name(entry->mutex), “sysvsem”)) { apr_os_proc_mutex_t ospmutex; #if !APR_HAVE_UNION_SEMUN union semun { long val; struct semid_ds *buf; unsigned short *array; }; #endif union semun ick; struct semid_ds buf; apr_os_proc_mutex_get(&ospmutex, entry->mutex); buf.sem_perm.uid = entry->uid; buf.sem_perm.gid = entry->gid; buf.sem_perm.mode = 0600; ick.buf = &buf; if (semctl(ospmutex.crossproc, 0, IPC_SET, ick) < 0) { ap_log_error(APLOG_MARK, APLOG_CRIT, errno, wsgi_server, "mod_wsgi (pid=%d): " "Couldn’t set permissions on accept " "mutex ‘%s’ (sysvsem).", getpid(), entry->mutex_path); return DECLINED; } } #endif #if APR_HAS_FLOCK_SERIALIZE if (!strcmp(apr_proc_mutex_name(entry->mutex), “flock”)) { if (chown(entry->mutex_path, entry->uid, -1) < 0) { ap_log_error(APLOG_MARK, APLOG_CRIT, errno, wsgi_server, "mod_wsgi (pid=%d): " "Couldn’t set permissions on accept " "mutex ‘%s’ (flock).", getpid(), entry->mutex_path); return DECLINED; } } #endif } } /* Create the actual required daemon processes. */ for (j = 1; j <= entry->processes; j++) { process = (WSGIDaemonProcess *)apr_pcalloc(p, sizeof( WSGIDaemonProcess)); process->group = entry; process->instance = j; status = wsgi_start_process(p, process); if (status != OK) return status; } } return OK; } static apr_pool_t *wsgi_pconf_pool = NULL; static int wsgi_deferred_start_daemons(apr_pool_t *p, ap_scoreboard_e sb_type) { return wsgi_start_daemons(wsgi_pconf_pool); } static apr_status_t wsgi_socket_connect_un(apr_socket_t *sock, struct sockaddr_un *sa) { apr_status_t rv; apr_os_sock_t rawsock; apr_interval_time_t t; rv = apr_os_sock_get(&rawsock, sock); if (rv != APR_SUCCESS) { return rv; } rv = apr_socket_timeout_get(sock, &t); if (rv != APR_SUCCESS) { return rv; } do { rv = connect(rawsock, (struct sockaddr*)sa, APR_OFFSETOF(struct sockaddr_un, sun_path) + strlen(sa->sun_path) + 1); } while (rv == -1 && errno == EINTR); if ((rv == -1) && (errno == EINPROGRESS || errno == EALREADY) && (t > 0)) { #if APR_MAJOR_VERSION < 2 rv = apr_wait_for_io_or_timeout(NULL, sock, 0); #else rv = apr_socket_wait(sock, APR_WAIT_WRITE); #endif if (rv != APR_SUCCESS) { return rv; } } if (rv == -1 && errno != EISCONN) { return errno; } return APR_SUCCESS; } static int wsgi_connect_daemon(request_rec *r, WSGIDaemonSocket *daemon) { WSGIRequestConfig *config = NULL; apr_status_t rv; struct sockaddr_un addr; int retries = 0; apr_interval_time_t timer = 0; apr_interval_time_t total_time = 0; apr_time_t start_time = 0; /* Grab request configuration. */ config = (WSGIRequestConfig *)ap_get_module_config(r->request_config, &wsgi_module); memset(&addr, 0, sizeof(addr)); addr.sun_family = AF_UNIX; apr_cpystrn(addr.sun_path, daemon->socket_path, sizeof(addr.sun_path)); start_time = apr_time_now(); while (1) { retries++; config->daemon_connects++; rv = apr_socket_create(&daemon->socket, AF_UNIX, SOCK_STREAM, 0, r->pool); if (rv != APR_SUCCESS) { ap_log_rerror(APLOG_MARK, APLOG_WARNING, rv, r, "mod_wsgi (pid=%d): Unable to create socket to " "connect to WSGI daemon process.", getpid()); return HTTP_INTERNAL_SERVER_ERROR; } /* * Apply timeout before issuing the socket connection in * case this hangs for some reason. Would have to be an extreme * event for a UNIX socket connect to hang, but have had some * unexplained situations which look exactly like that. */ if (daemon->socket_timeout) apr_socket_timeout_set(daemon->socket, daemon->socket_timeout); else apr_socket_timeout_set(daemon->socket, r->server->timeout); rv = wsgi_socket_connect_un(daemon->socket, &addr); if (rv != APR_SUCCESS) { /* * We need to check for both connection refused and * connection unavailable as Linux systems when * connecting to a UNIX listener socket in non * blocking mode, where the listener backlog is full * will return the error EAGAIN rather than returning * ECONNREFUSED as is supposedly dictated by POSIX. */ if (APR_STATUS_IS_ECONNREFUSED(rv) || APR_STATUS_IS_EAGAIN(rv)) { if ((apr_time_now()-start_time) < daemon->connect_timeout) { if (wsgi_server_config->verbose_debugging) { ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rv, r, "mod_wsgi (pid=%d): Connection attempt " "#%d to WSGI daemon process ‘%s’ on " "’%s’ failed, sleeping before retrying " "again.", getpid(), retries, daemon->name, daemon->socket_path); } apr_socket_close(daemon->socket); /* * Progressively increase time we wait between * connection attempts. Start at 0.125 second, but * back off to 1 second interval after 2 seconds. */ if (total_time < apr_time_make(2, 0)) timer = apr_time_make(0, 125000); else timer = apr_time_make(1, 0); apr_sleep(timer); total_time += timer; } else { ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, "mod_wsgi (pid=%d): Unable to connect to " "WSGI daemon process ‘%s’ on ‘%s’ after " "multiple attempts as listener backlog " "limit was exceeded or the socket does " "not exist.", getpid(), daemon->name, daemon->socket_path); apr_socket_close(daemon->socket); return HTTP_SERVICE_UNAVAILABLE; } } else { ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, "mod_wsgi (pid=%d): Unable to connect to " "WSGI daemon process ‘%s’ on ‘%s’ as user " "with uid=%ld.", getpid(), daemon->name, daemon->socket_path, (long)geteuid()); apr_socket_close(daemon->socket); return HTTP_SERVICE_UNAVAILABLE; } } else break; } return OK; } static apr_status_t wsgi_socket_send(apr_socket_t *sock, const char *buf, size_t buf_size) { apr_status_t rv; apr_size_t len; while (buf_size > 0) { len = buf_size; rv = apr_socket_send(sock, buf, &len); if (rv != APR_SUCCESS) return rv; buf += len; buf_size -= len; } return APR_SUCCESS; } static apr_status_t wsgi_socket_sendv_limit(apr_socket_t *sock, struct iovec *vec, size_t nvec) { apr_status_t rv; apr_size_t written = 0; apr_size_t to_write = 0; size_t i, offset; /* Calculate how much has to be sent. */ for (i = 0; i < nvec; i++) { to_write += vec[i].iov_len; } /* Loop until all data has been sent. */ offset = 0; while (to_write) { apr_size_t n = 0; rv = apr_socket_sendv(sock, vec+offset, nvec-offset, &n); if (rv != APR_SUCCESS) return rv; if (n > 0) { /* Bail out of all data has been sent. */ written += n; if (written >= to_write) break; /* * Not all data was sent, so ween need to try * again with the remainder of the data. We * first need to work out where to start from. */ for (i = offset; i < nvec; ) { if (n >= vec[i].iov_len) { offset++; n -= vec[i++].iov_len; } else { vec[i].iov_len -= n; vec[i].iov_base = (char *) vec[i].iov_base + n; break; } } } } return APR_SUCCESS; } static apr_status_t wsgi_socket_sendv(apr_socket_t *sock, struct iovec *vec, size_t nvec) { #if defined(_SC_IOV_MAX) static size_t iov_max = 0; if (iov_max == 0) iov_max = sysconf(_SC_IOV_MAX); #else static size_t iov_max = APR_MAX_IOVEC_SIZE; #endif if (nvec > iov_max) { int offset = 0; while (nvec != 0) { apr_status_t rv; rv = wsgi_socket_sendv_limit(sock, &vec[offset], (nvec < iov_max ? nvec : (int)iov_max)); if (rv != APR_SUCCESS) return rv; if (nvec > iov_max) { nvec -= iov_max; offset += iov_max; } else { nvec = 0; } } return APR_SUCCESS; } else return wsgi_socket_sendv_limit(sock, vec, nvec); } static apr_status_t wsgi_send_request(request_rec *r, WSGIRequestConfig *config, WSGIDaemonSocket *daemon) { int rv; const apr_array_header_t *env_arr; const apr_table_entry_t *elts; int i; struct iovec *vec; struct iovec *vec_start; struct iovec *vec_next; apr_size_t total = 0; apr_size_t count = 0; apr_table_setn(r->subprocess_env, "mod_wsgi.daemon_connects", apr_psprintf(r->pool, "%d", config->daemon_connects)); apr_table_setn(r->subprocess_env, "mod_wsgi.daemon_restarts", apr_psprintf(r->pool, "%d", config->daemon_restarts)); /* Send subprocess environment from request object. */ env_arr = apr_table_elts(r->subprocess_env); elts = (const apr_table_entry_t *)env_arr->elts; /* * Sending total amount of data, followed by count of separate * strings and then each null terminated string. The total is * inclusive of the bytes used for the count of the strings. */ vec = (struct iovec *)apr_palloc(r->pool, (2+(2*env_arr->nelts))* sizeof(struct iovec)); vec_start = &vec[2]; vec_next = vec_start; for (i=0; i<env_arr->nelts; ++i) { if (!elts[i].key) continue; vec_next->iov_base = (void*)elts[i].key; vec_next->iov_len = strlen(elts[i].key) + 1; total += vec_next->iov_len; vec_next++; if (elts[i].val) { vec_next->iov_base = (void*)elts[i].val; vec_next->iov_len = strlen(elts[i].val) + 1; } else { vec_next->iov_base = (void*)""; vec_next->iov_len = 1; } total += vec_next->iov_len; vec_next++; } count = vec_next - vec_start; vec[1].iov_base = (void*)&count; vec[1].iov_len = sizeof(count); total += vec[1].iov_len; vec[0].iov_base = (void*)&total; vec[0].iov_len = sizeof(total); rv = wsgi_socket_sendv(daemon->socket, vec, (int)(vec_next-vec)); if (rv != APR_SUCCESS) return rv; return APR_SUCCESS; } static void wsgi_discard_output(apr_bucket_brigade *bb) { apr_bucket *e; const char *buf; apr_size_t len; apr_status_t rv; for (e = APR_BRIGADE_FIRST(bb); e != APR_BRIGADE_SENTINEL(bb); e = APR_BUCKET_NEXT(e)) { if (APR_BUCKET_IS_EOS(e)) { break; } rv = apr_bucket_read(e, &buf, &len, APR_BLOCK_READ); if (rv != APR_SUCCESS) { break; } } } static int wsgi_copy_header(void *v, const char *key, const char *val) { apr_table_addn(v, key, val); return 1; } #define HTTP_UNSET (-HTTP_OK) static int wsgi_scan_headers(request_rec *r, char *buffer, int buflen, int (*getsfunc) (char *, int, void *), void *getsfunc_data) { char x[32768]; char *w, *l; size_t p; int cgi_status = HTTP_UNSET; apr_table_t *merge; apr_table_t *cookie_table; apr_table_t *authen_table; WSGIRequestConfig *config = NULL; config = (WSGIRequestConfig *)ap_get_module_config(r->request_config, &wsgi_module); /* * Default to internal fixed size buffer for reading headers if one * is not supplied explicitly with the call. */ if (buffer) *buffer = '\0’; w = buffer ? buffer : x; buflen = buffer ? buflen : sizeof(x); /* Temporary place to hold headers as we read them. */ merge = apr_table_make(r->pool, 10); /* * The HTTP specification says that it is legal to merge duplicate * headers into one. Some browsers don’t like certain headers being * merged however. These headers are Set-Cookie and WWW-Authenticate. * We will therefore keep these separate and merge them back in * independently at the end. Before we start though, we need to make * sure we save away any instances of these headers which may already * be listed in the request structure for some reason. */ cookie_table = apr_table_make(r->pool, 2); apr_table_do(wsgi_copy_header, cookie_table, r->headers_out, "Set-Cookie", NULL); authen_table = apr_table_make(r->pool, 2); apr_table_do(wsgi_copy_header, authen_table, r->err_headers_out, "WWW-Authenticate", NULL); while (1) { int rv = (*getsfunc) (w, buflen - 1, getsfunc_data); if (rv == 0) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Truncated or " "oversized response headers received from " "daemon process '%s’", config->process_group), r->filename); r->status_line = NULL; return HTTP_INTERNAL_SERVER_ERROR; } else if (rv == -1) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Timeout when " "reading response headers from daemon " "process '%s’", config->process_group), r->filename); r->status_line = NULL; return HTTP_GATEWAY_TIME_OUT; } /* * Delete any trailing (CR?)LF. Indeed, the host’s '\n’: * ‘\012’ for UNIX; ‘\015’ for MacOS; ‘\025’ for OS/390. */ p = strlen(w); if (p > 0 && w[p - 1] == ‘\n’) { if (p > 1 && w[p - 2] == CR) { w[p - 2] = '\0’; } else { w[p - 1] = '\0’; } } /* * If we’ve finished reading the headers, check to make sure * any HTTP/1.1 conditions are met. If so, we’re done; normal * processing will handle the script’s output. If not, just * return the error. */ if (w[0] == ‘\0’) { int cond_status = OK; /* * This fails because it gets confused when a CGI Status * header overrides ap_meets_conditions. * * We can fix that by dropping ap_meets_conditions when * Status has been set. Since this is the only place * cgi_status gets used, let’s test it explicitly. * * The alternative would be to ignore CGI Status when * ap_meets_conditions returns anything interesting. That * would be safer wrt HTTP, but would break CGI. */ if ((cgi_status == HTTP_UNSET) && (r->method_number == M_GET)) { cond_status = ap_meets_conditions®; } /* * Merge the headers received back into the request * structure. There should only be one per header with * values combined for these. */ apr_table_overlap(r->headers_out, merge, APR_OVERLAP_TABLES_MERGE); /* * Now add in the special headers which we can’t merge * because it gives certain browsers problems. */ if (!apr_is_empty_table(cookie_table)) { apr_table_unset(r->headers_out, “Set-Cookie”); r->headers_out = apr_table_overlay(r->pool, r->headers_out, cookie_table); } if (!apr_is_empty_table(authen_table)) { apr_table_unset(r->err_headers_out, “WWW-Authenticate”); r->err_headers_out = apr_table_overlay(r->pool, r->err_headers_out, authen_table); } return cond_status; } /* If we see a bogus header don’t ignore it. Shout and scream. */ if (!(l = strchr(w, ‘:’))) { char malformed[32]; strncpy(malformed, w, sizeof(malformed)-1); malformed[sizeof(malformed)-1] = '\0’; if (!buffer) { /* Soak up all the script output. */ while ((*getsfunc)(w, buflen - 1, getsfunc_data) > 0) { continue; } } wsgi_log_script_error(r, apr_psprintf(r->pool, "Malformed " "header ‘%s’ found when reading script " "headers from daemon process '%s’", malformed, config->process_group), r->filename); r->status_line = NULL; return HTTP_INTERNAL_SERVER_ERROR; } /* Strip leading white space from header value. */ *l++ = '\0’; while (*l && apr_isspace(*l)) { ++l; } if (!strcasecmp(w, “Content-type”)) { char *tmp; /* Nuke trailing whitespace. */ char *endp = l + strlen(l) - 1; while (endp > l && apr_isspace(*endp)) { *endp-- = '\0’; } tmp = apr_pstrdup(r->pool, l); ap_content_type_tolower(tmp); ap_set_content_type(r, tmp); } else if (!strcasecmp(w, “Status”)) { /* * If the script returned a specific status, that’s what * we’ll use, otherwise we assume 200 OK. */ r->status = cgi_status = atoi(l); r->status_line = apr_pstrdup(r->pool, l); } else if (!strcasecmp(w, “Location”)) { apr_table_set(r->headers_out, w, l); } else if (!strcasecmp(w, “Content-Length”)) { apr_table_set(r->headers_out, w, l); } else if (!strcasecmp(w, “Content-Range”)) { apr_table_set(r->headers_out, w, l); } else if (!strcasecmp(w, “Transfer-Encoding”)) { apr_table_set(r->headers_out, w, l); } else if (!strcasecmp(w, “Last-Modified”)) { /* * If the script gave us a Last-Modified header, we can’t just * pass it on blindly because of restrictions on future values. */ ap_update_mtime(r, apr_date_parse_http(l)); ap_set_last_modified®; } else if (!strcasecmp(w, “Set-Cookie”)) { apr_table_add(cookie_table, w, l); } else if (!strcasecmp(w, “WWW-Authenticate”)) { apr_table_add(authen_table, w, l); } else { apr_table_add(merge, w, l); } } return OK; } static int wsgi_getsfunc_brigade(char *buf, int len, void *arg) { apr_bucket_brigade *bb = (apr_bucket_brigade *)arg; const char *dst_end = buf + len - 1; char *dst = buf; apr_bucket *e = APR_BRIGADE_FIRST(bb); apr_status_t rv; int done = 0; while ((dst < dst_end) && !done && e != APR_BRIGADE_SENTINEL(bb) && !APR_BUCKET_IS_EOS(e)) { const char *bucket_data; apr_size_t bucket_data_len; const char *src; const char *src_end; apr_bucket * next; rv = apr_bucket_read(e, &bucket_data, &bucket_data_len, APR_BLOCK_READ); if (rv != APR_SUCCESS || (bucket_data_len == 0)) { *dst = '\0’; return APR_STATUS_IS_TIMEUP(rv) ? -1 : 0; } src = bucket_data; src_end = bucket_data + bucket_data_len; while ((src < src_end) && (dst < dst_end) && !done) { if (*src == ‘\n’) { done = 1; } else if (*src != ‘\r’) { *dst++ = *src; } src++; } if (src < src_end) { apr_bucket_split(e, src - bucket_data); } next = APR_BUCKET_NEXT(e); APR_BUCKET_REMOVE(e); apr_bucket_destroy(e); e = next; } *dst = '\0’; return done; } static int wsgi_scan_headers_brigade(request_rec *r, apr_bucket_brigade *bb, char *buffer, int buflen) { return wsgi_scan_headers(r, buffer, buflen, wsgi_getsfunc_brigade, bb); } static int wsgi_transfer_response(request_rec *r, apr_bucket_brigade *bb, apr_size_t buffer_size, apr_time_t timeout) { apr_bucket *e; apr_read_type_e mode = APR_NONBLOCK_READ; apr_bucket_brigade *tmpbb; const char *data = NULL; apr_size_t length = 0; apr_size_t bytes_transfered = 0; int bucket_count = 0; apr_status_t rv; #if AP_MODULE_MAGIC_AT_LEAST(20110605, 2) apr_socket_t *sock; apr_interval_time_t existing_timeout = 0; #endif if (buffer_size == 0) buffer_size = 65536; /* * Override the socket timeout for writing back data to the * client. If that wasn’t defined this will be the same as * the timeout for the socket used in communicating with the * daemon, or left as the overall server timeout if that * isn’t specified. Just to be safe we remember the existing * timeout and restore it at the end of a successful request * in case the same connection if kept alive and used for a * subsequent request with a different handler. */ #if AP_MODULE_MAGIC_AT_LEAST(20110605, 2) sock = ap_get_conn_socket(r->connection); rv = apr_socket_timeout_get(sock, &existing_timeout); if (rv != APR_SUCCESS) { existing_timeout = 0; } else { if (timeout) apr_socket_timeout_set(sock, timeout); } #endif /* * Transfer any response content. We want to avoid the * problem where the core output filter has no flow control * to deal with slow HTTP clients and can actually buffer up * excessive amounts of response content in memory. A fix * for this was only introduced in Apache 2.3.3, with * possible further tweaks in Apache 2.4.1. To avoid issue of * what version it was implemented in, just employ a * strategy of forcing a flush every time we pass through * more than a certain amount of data. */ tmpbb = apr_brigade_create(r->pool, r->connection->bucket_alloc); while ((e = APR_BRIGADE_FIRST(bb)) != APR_BRIGADE_SENTINEL(bb)) { /* If we have reached end of stream, we need to pass it on */ if (APR_BUCKET_IS_EOS(e)) { /* * Probably do not need to force a flush as EOS should * do that, but do it just in case when we potentially * have pending data to be written out. */ if (bytes_transfered != 0) { APR_BRIGADE_INSERT_TAIL(tmpbb, apr_bucket_flush_create( r->connection->bucket_alloc)); } APR_BRIGADE_INSERT_TAIL(tmpbb, apr_bucket_eos_create( r->connection->bucket_alloc)); rv = ap_pass_brigade(r->output_filters, tmpbb); apr_brigade_cleanup(tmpbb); if (rv != APR_SUCCESS) { apr_brigade_destroy(bb); /* * Don’t flag error if client connection was aborted * so that access log still records the original HTTP * response code returned by the WSGI application. */ if (r->connection->aborted) return OK; return HTTP_INTERNAL_SERVER_ERROR; } break; } /* * Force the reading in of next block of data to be * transfered if necessary. If the bucket is a heap * bucket, then it will be whatever data is in it. If it * is a socket bucket, this will result in the bucket * being converted to a heap bucket with some amount of * data and the socket bucket added back in after it. Any * non data buckets should be skipped and discarded. The * result should always be that the first bucket is a * heap bucket. */ rv = apr_bucket_read(e, &data, &length, mode); /* * If we would have blocked if not in non blocking mode * we send a flush bucket to ensure that all buffered * data is sent out before we block waiting for more. */ if (rv == APR_EAGAIN && mode == APR_NONBLOCK_READ) { APR_BRIGADE_INSERT_TAIL(tmpbb, apr_bucket_flush_create( r->connection->bucket_alloc)); rv = ap_pass_brigade(r->output_filters, tmpbb); apr_brigade_cleanup(tmpbb); if (rv == APR_TIMEUP) { ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, "mod_wsgi (pid=%d): Failed to proxy response " "to client.", getpid()); } if (rv != APR_SUCCESS) { apr_brigade_destroy(bb); /* * Don’t flag error if client connection was aborted * so that access log still records the original HTTP * response code returned by the WSGI application. */ if (r->connection->aborted) return OK; return HTTP_INTERNAL_SERVER_ERROR; } bytes_transfered = 0; bucket_count = 0; /* * Retry read from daemon using a blocking read. We do * not delete the bucket as we want to operate on the * same one as we would have blocked. */ mode = APR_BLOCK_READ; continue; } else if (rv != APR_SUCCESS) { apr_brigade_destroy(bb); ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, "mod_wsgi (pid=%d): Failed to proxy response " "from daemon.", getpid()); /* * Don’t flag error if couldn’t read from daemon * so that access log still records the original HTTP * response code returned by the WSGI application. */ return OK; } /* * We had some data to transfer. Next time round we need to * always be try a non-blocking read first. */ mode = APR_NONBLOCK_READ; /* * Now we don’t actually work with the data which was * read direct and instead simply remove what should be a * heap bucket from the start of the bucket brigade and * then place in a new bucket brigade to be pushed out to * the client. By passing down the bucket, it avoids the * need to create a transient bucket holding a reference * to the data from the first bucket. */ APR_BUCKET_REMOVE(e); APR_BRIGADE_INSERT_TAIL(tmpbb, e); /* * If we have reached the buffer size threshold, we want * to flush the data so that we aren’t buffering too much * in memory and blowing out memory size. We also have a * check on the number of buckets we have accumulated as * a large number of buckets with very small amounts of * data will also accumulate a lot of memory. Apache’s * own flow control doesn’t cope with such a situation. * Right now hard wire the max number of buckets at 16 * which equates to worst case number of separate data * blocks can be written by a writev() call on systems * such as Solaris. */ bytes_transfered += length; bucket_count += 1; if (bytes_transfered > buffer_size || bucket_count >= 16) { APR_BRIGADE_INSERT_TAIL(tmpbb, apr_bucket_flush_create( r->connection->bucket_alloc)); bytes_transfered = 0; bucket_count = 0; /* * Since we flushed the data out to the client, it is * okay to go back and do a blocking read the next time. */ mode = APR_BLOCK_READ; } /* Pass the heap bucket and any flush bucket on. */ rv = ap_pass_brigade(r->output_filters, tmpbb); apr_brigade_cleanup(tmpbb); if (rv == APR_TIMEUP) { ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, "mod_wsgi (pid=%d): Failed to proxy response " "to client.", getpid()); } if (rv != APR_SUCCESS) { apr_brigade_destroy(bb); /* * Don’t flag error if client connection was aborted * so that access log still records the original HTTP * response code returned by the WSGI application. */ if (r->connection->aborted) return OK; return HTTP_INTERNAL_SERVER_ERROR; } } #if AP_MODULE_MAGIC_AT_LEAST(20110605, 2) if (existing_timeout) apr_socket_timeout_set(sock, existing_timeout); #endif apr_brigade_destroy(bb); return OK; } #define ASCII_CRLF “\015\012” #define ASCII_ZERO “\060” static int wsgi_execute_remote(request_rec *r) { WSGIRequestConfig *config = NULL; WSGIDaemonSocket *daemon = NULL; WSGIProcessGroup *group = NULL; char *key = NULL; const char *hash = NULL; int status; apr_status_t rv; int seen_eos; int child_stopped_reading; apr_bucket_brigade *bbout; apr_bucket_brigade *bbin; apr_bucket *b; const char *location = NULL; char *header_buffer = NULL; int header_buflen = 0; /* Grab request configuration. */ config = (WSGIRequestConfig *)ap_get_module_config(r->request_config, &wsgi_module); /* * Only allow the process group to match against a restricted * set of processes if such a restricted set has been defined. */ if (config->restrict_process) { if (!apr_table_get(config->restrict_process, config->process_group)) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Daemon " "process called ‘%s’ cannot be " "accessed by this WSGI application " "as not a member of allowed groups", config->process_group), r->filename); return HTTP_INTERNAL_SERVER_ERROR; } } /* * Do not process request as remote if actually targeted at * the main Apache processes. */ if (!*config->process_group) return DECLINED; /* Grab details of matching process group. */ if (!wsgi_daemon_index) { wsgi_log_script_error(r, apr_psprintf(r->pool, "No WSGI daemon " "process called ‘%s’ has been configured", config->process_group), r->filename); return HTTP_INTERNAL_SERVER_ERROR; } group = (WSGIProcessGroup *)apr_hash_get(wsgi_daemon_index, config->process_group, APR_HASH_KEY_STRING); if (!group) { wsgi_log_script_error(r, apr_psprintf(r->pool, "No WSGI daemon " "process called ‘%s’ has been configured", config->process_group), r->filename); return HTTP_INTERNAL_SERVER_ERROR; } /* * Only allow the process group to match against a daemon * process defined within a virtual host with the same * server name or a daemon process defined at global server * scope. */ if (group->server != r->server && group->server != wsgi_server) { if (strcmp(group->server->server_hostname, r->server->server_hostname) != 0) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Daemon " "process called ‘%s’ cannot be " "accessed by this WSGI application", config->process_group), r->filename); return HTTP_INTERNAL_SERVER_ERROR; } } /* * Check restrictions related to the group of the WSGI * script file and who has write access to the directory it * is contained in. If not satisfied forbid access. */ if (group->script_group) { apr_uid_t gid; struct group *grent = NULL; const char *grname = NULL; apr_finfo_t finfo; const char *path = NULL; if (!(r->finfo.valid & APR_FINFO_GROUP)) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Group " "information not available for WSGI " “script file”), r->filename); return HTTP_FORBIDDEN; } gid = r->finfo.group; if ((grent = getgrgid(gid)) == NULL) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Couldn’t " "determine group of WSGI script file, " "gid=%ld", (long)gid), r->filename); return HTTP_FORBIDDEN; } grname = grent->gr_name; if (strcmp(group->script_group, grname)) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Group of WSGI " "script file does not match required group " "for daemon process, group=%s", grname), r->filename); return HTTP_FORBIDDEN; } if (!(r->finfo.valid & APR_FINFO_WPROT)) { wsgi_log_script_error(r, apr_psprintf(r->pool, "World " "permissions not available for WSGI " “script file”), r->filename); return HTTP_FORBIDDEN; } if (r->finfo.protection & APR_FPROT_WWRITE) { wsgi_log_script_error(r, apr_psprintf(r->pool, "WSGI script " “file is writable to world”), r->filename); return HTTP_FORBIDDEN; } path = ap_make_dirstr_parent(r->pool, r->filename); if (apr_stat(&finfo, path, APR_FINFO_NORM, r->pool) != APR_SUCCESS) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Unable to stat " “parent directory of WSGI script”), path); return HTTP_FORBIDDEN; } gid = finfo.group; if ((grent = getgrgid(gid)) == NULL) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Couldn’t " "determine group of parent directory of " "WSGI script file, gid=%ld", (long)gid), r->filename); return HTTP_FORBIDDEN; } grname = grent->gr_name; if (strcmp(group->script_group, grname)) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Group of parent " "directory of WSGI script file does not " "match required group for daemon process, " "group=%s", grname), r->filename); return HTTP_FORBIDDEN; } if (finfo.protection & APR_FPROT_WWRITE) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Parent directory " “of WSGI script file is writable to world”), r->filename); return HTTP_FORBIDDEN; } } /* * Check restrictions related to who can be the owner of * the WSGI script file and who has write access to the * directory it is contained in. If not satisfied forbid * access. */ if (group->script_user) { apr_uid_t uid; struct passwd *pwent = NULL; const char *pwname = NULL; apr_finfo_t finfo; const char *path = NULL; if (!(r->finfo.valid & APR_FINFO_USER)) { wsgi_log_script_error(r, apr_psprintf(r->pool, "User " "information not available for WSGI " “script file”), r->filename); return HTTP_FORBIDDEN; } uid = r->finfo.user; if ((pwent = getpwuid(uid)) == NULL) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Couldn’t " "determine owner of WSGI script file, " "uid=%ld", (long)uid), r->filename); return HTTP_FORBIDDEN; } pwname = pwent->pw_name; if (strcmp(group->script_user, pwname)) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Owner of WSGI " "script file does not match required user " "for daemon process, user=%s", pwname), r->filename); return HTTP_FORBIDDEN; } if (!(r->finfo.valid & APR_FINFO_GPROT)) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Group " "permissions not available for WSGI " “script file”), r->filename); return HTTP_FORBIDDEN; } if (r->finfo.protection & APR_FPROT_GWRITE) { wsgi_log_script_error(r, apr_psprintf(r->pool, "WSGI script " “file is writable to group”), r->filename); return HTTP_FORBIDDEN; } if (!(r->finfo.valid & APR_FINFO_WPROT)) { wsgi_log_script_error(r, apr_psprintf(r->pool, "World " "permissions not available for WSGI " “script file”), r->filename); return HTTP_FORBIDDEN; } if (r->finfo.protection & APR_FPROT_WWRITE) { wsgi_log_script_error(r, apr_psprintf(r->pool, "WSGI script " “file is writable to world”), r->filename); return HTTP_FORBIDDEN; } path = ap_make_dirstr_parent(r->pool, r->filename); if (apr_stat(&finfo, path, APR_FINFO_NORM, r->pool) != APR_SUCCESS) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Unable to stat " “parent directory of WSGI script”), path); return HTTP_FORBIDDEN; } uid = finfo.user; if ((pwent = getpwuid(uid)) == NULL) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Couldn’t " "determine owner of parent directory of " "WSGI script file, uid=%ld", (long)uid), r->filename); return HTTP_FORBIDDEN; } pwname = pwent->pw_name; if (strcmp(group->script_user, pwname)) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Owner of parent " "directory of WSGI script file does not " "match required user for daemon process, " "user=%s", pwname), r->filename); return HTTP_FORBIDDEN; } if (finfo.protection & APR_FPROT_WWRITE) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Parent directory " “of WSGI script file is writable to world”), r->filename); return HTTP_FORBIDDEN; } if (finfo.protection & APR_FPROT_GWRITE) { wsgi_log_script_error(r, apr_psprintf(r->pool, "Parent directory " “of WSGI script file is writable to group”), r->filename); return HTTP_FORBIDDEN; } } /* * Add magic marker into request environment so that daemon * process can verify that request is from a sender that can * be trusted. Wipe out original key to make it a bit harder * for rogue code in Apache child processes to trawl through * memory looking for unhashed string. */ key = apr_psprintf(r->pool, "%ld|%s|%s|%s", group->random, group->socket_path, r->filename, config->handler_script); hash = ap_md5(r->pool, (const unsigned char *)key); memset(key, '\0’, strlen(key)); apr_table_setn(r->subprocess_env, "mod_wsgi.magic", hash); /* Create connection to the daemon process. */ apr_table_setn(r->subprocess_env, "mod_wsgi.queue_start", apr_psprintf(r->pool, “%” APR_TIME_T_FMT, apr_time_now())); daemon = (WSGIDaemonSocket *)apr_pcalloc(r->pool, sizeof(WSGIDaemonSocket)); daemon->name = config->process_group; daemon->socket_path = group->socket_path; daemon->connect_timeout = group->connect_timeout; daemon->socket_timeout = group->socket_timeout; if ((status = wsgi_connect_daemon(r, daemon)) != OK) return status; /* Send request details and subprocess environment. */ if (wsgi_server_config->verbose_debugging) { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Request server was " "’%s|%d’.", getpid(), r->server->server_hostname, r->server->port); } if ((rv = wsgi_send_request(r, config, daemon)) != APR_SUCCESS) { ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, "mod_wsgi (pid=%d): Unable to send request details " "to WSGI daemon process ‘%s’ on '%s’.", getpid(), daemon->name, daemon->socket_path); return HTTP_INTERNAL_SERVER_ERROR; } /* Setup bucket brigade for reading response from daemon. */ bbin = apr_brigade_create(r->pool, r->connection->bucket_alloc); b = apr_bucket_socket_create(daemon->socket, r->connection->bucket_alloc); APR_BRIGADE_INSERT_TAIL(bbin, b); b = apr_bucket_eos_create(r->connection->bucket_alloc); APR_BRIGADE_INSERT_TAIL(bbin, b); /* Create alternate buffer for reading in response header values. */ if (group->header_buffer_size != 0) { header_buflen = group->header_buffer_size; header_buffer = apr_pcalloc(r->pool, header_buflen); } /* * If process reload mechanism enabled, or a queue timeout is * specified, then we need to look for marker indicating it * is okay to transfer content, or whether process is being * restarted and that we should therefore create a * connection to daemon process again. */ if (*config->process_group && (config->script_reloading || group->queue_timeout != 0)) { int retries = 0; int maximum = (2*group->processes)+1; /* * While special header indicates a restart is being * done, then keep trying to reconnect. Cap the number * of retries to at most about 2 times the number of * daemon processes in the process group. If still being * told things are being restarted, then we will error * indicating service is unavailable. */ while (retries < maximum) { /* Scan the CGI script like headers from daemon. */ status = wsgi_scan_headers_brigade(r, bbin, header_buffer, header_buflen); if (status != OK) return status; /* * Status must be 200 for our special headers. Ideally * we would use 0 as did in the past but Apache 2.4 * complains if use 0 as not a valid status value. */ if (r->status != 200) { ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): Unexpected status from " "WSGI daemon process '%d’.", getpid(), r->status); r->status_line = NULL; return HTTP_INTERNAL_SERVER_ERROR; } if (!strcmp(r->status_line, “200 Continue”)) { r->status_line = NULL; break; } if (!strcmp(r->status_line, “200 Timeout”)) { r->status_line = NULL; return HTTP_GATEWAY_TIME_OUT; } if (strcmp(r->status_line, “200 Rejected”)) { ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): Unexpected status from " "WSGI daemon process '%d’.", getpid(), r->status); r->status_line = NULL; return HTTP_INTERNAL_SERVER_ERROR; } r->status_line = NULL; /* Need to close previous socket connection first. */ apr_socket_close(daemon->socket); /* Has maximum number of attempts been reached. */ if (retries == maximum) { ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, "mod_wsgi (pid=%d): Maximum number of WSGI " "daemon process restart connects reached '%d’.", getpid(), maximum); return HTTP_SERVICE_UNAVAILABLE; } retries++; config->daemon_restarts++; ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, "mod_wsgi (pid=%d): Connect after WSGI daemon " "process restart, attempt #%d.", getpid(), retries); /* Connect and setup connection just like before. */ if ((status = wsgi_connect_daemon(r, daemon)) != OK) return status; if ((rv = wsgi_send_request(r, config, daemon)) != APR_SUCCESS) { ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, "mod_wsgi (pid=%d): Unable to send request " "details to WSGI daemon process ‘%s’ on '%s’.", getpid(), daemon->name, daemon->socket_path); return HTTP_INTERNAL_SERVER_ERROR; } apr_brigade_destroy(bbin); bbin = apr_brigade_create(r->pool, r->connection->bucket_alloc); b = apr_bucket_socket_create(daemon->socket, r->connection->bucket_alloc); APR_BRIGADE_INSERT_TAIL(bbin, b); b = apr_bucket_eos_create(r->connection->bucket_alloc); APR_BRIGADE_INSERT_TAIL(bbin, b); } } /* * Need to reset request status value to HTTP_OK else it * screws up HTTP input filter when processing a POST * request with 100-continue requirement. */ r->status = HTTP_OK; /* * Transfer any request content which was provided. Note that we * actually frame each data block sent with same format as is used * for chunked transfer encoding. This will be decoded in the * daemon process. This is done so that the EOS can be properly * identified by the daemon process in the absence of a value for * CONTENT_LENGTH that can be relied on. The CONTENT_LENGTH is * dodgy when have mutating input filters and none will be present * at all if chunked request content was used. */ seen_eos = 0; child_stopped_reading = 0; bbout = apr_brigade_create(r->pool, r->connection->bucket_alloc); do { apr_bucket *bucket; rv = ap_get_brigade(r->input_filters, bbout, AP_MODE_READBYTES, APR_BLOCK_READ, HUGE_STRING_LEN); if (rv != APR_SUCCESS) { char status_buffer[512]; const char *error_message; error_message = apr_psprintf(r->pool, "Request data read " "error when proxying data to daemon process: %s", apr_strerror(rv, status_buffer, sizeof( status_buffer)-1)); ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): %s.", getpid(), error_message); if (APR_STATUS_IS_TIMEUP(rv)) return HTTP_REQUEST_TIME_OUT; return HTTP_INTERNAL_SERVER_ERROR; } for (bucket = APR_BRIGADE_FIRST(bbout); bucket != APR_BRIGADE_SENTINEL(bbout); bucket = APR_BUCKET_NEXT(bucket)) { const char *data; apr_size_t len; char chunk_hdr[20]; apr_size_t hdr_len; struct iovec vec[3]; if (APR_BUCKET_IS_EOS(bucket)) { /* Send closing frame for chunked content. */ rv = wsgi_socket_send(daemon->socket, ASCII_ZERO ASCII_CRLF ASCII_CRLF, 5); if (rv != APR_SUCCESS) { char status_buffer[512]; const char *error_message; error_message = apr_psprintf(r->pool, "Request data write " "error when proxying data to daemon process: %s", apr_strerror(rv, status_buffer, sizeof( status_buffer)-1)); ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): %s.", getpid(), error_message); } seen_eos = 1; break; } /* We can’t do much with this. */ if (APR_BUCKET_IS_FLUSH(bucket)) { continue; } /* If the child stopped, we still must read to EOS. */ if (child_stopped_reading) { continue; } /* Read block. */ rv = apr_bucket_read(bucket, &data, &len, APR_BLOCK_READ); if (rv != APR_SUCCESS) { char status_buffer[512]; const char *error_message; error_message = apr_psprintf(r->pool, "Request data read " "error when proxying data to daemon process: %s", apr_strerror(rv, status_buffer, sizeof( status_buffer)-1)); ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): %s.", getpid(), error_message); break; } /* * Keep writing data to the child until done or too * much time elapses with no progress or an error * occurs. Frame the data being sent with format used * for chunked transfer encoding. */ hdr_len = apr_snprintf(chunk_hdr, sizeof(chunk_hdr), “%” APR_UINT64_T_HEX_FMT ASCII_CRLF, (apr_uint64_t)len); vec[0].iov_base = (void *)chunk_hdr; vec[0].iov_len = hdr_len; vec[1].iov_base = (void *)data; vec[1].iov_len = len; vec[2].iov_base = (void *)ASCII_CRLF; vec[2].iov_len = 2; rv = wsgi_socket_sendv(daemon->socket, vec, 3); if (rv != APR_SUCCESS) { char status_buffer[512]; const char *error_message; error_message = apr_psprintf(r->pool, "Request data write " "error when proxying data to daemon process: %s", apr_strerror(rv, status_buffer, sizeof( status_buffer)-1)); ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): %s.", getpid(), error_message); /* Daemon stopped reading, discard remainder. */ child_stopped_reading = 1; } } apr_brigade_cleanup(bbout); } while (!seen_eos); /* * Close socket for writing so that daemon detects end of * request content. */ apr_socket_shutdown(daemon->socket, APR_SHUTDOWN_WRITE); /* Scan the CGI script like headers from daemon. */ status = wsgi_scan_headers_brigade(r, bbin, header_buffer, header_buflen); if (status != OK) return status; /* * Look for the special case of status being 200 but the * status line indicating an error and translate it into a * 500 error so that error document processing will occur * for those cases where WSGI application wouldn’t have * supplied their own error document. We used to use 0 * here for status but Apache 2.4 prohibits it now. */ if (r->status == 200 && !strcmp(r->status_line, “200 Error”)) { r->status_line = NULL; return HTTP_INTERNAL_SERVER_ERROR; } /* * Look for ‘Location’ header and if an internal * redirect, execute the redirect. This behaviour is * consistent with how mod_cgi and mod_cgid work and * what is permitted by the CGI specification. */ location = apr_table_get(r->headers_out, “Location”); if (location && location[0] == ‘/’ && r->status == 200) { /* * Discard all response content returned from * the daemon process. */ wsgi_discard_output(bbin); apr_brigade_destroy(bbin); /* * The internal redirect needs to be a GET no * matter what the original method was. */ r->method = apr_pstrdup(r->pool, “GET”); r->method_number = M_GET; /* * We already read the message body (if any), so * don’t allow the redirected request to think * it has one. Not sure if we need to worry * about removing ‘Transfer-Encoding’ header. */ apr_table_unset(r->headers_in, “Content-Length”); ap_internal_redirect_handler(location, r); return OK; } /* * Allow the web server to override any error * page produced by the WSGI application. */ if (config->error_override && ap_is_HTTP_ERROR(r->status)) { status = r->status; r->status = HTTP_OK; r->status_line = NULL; /* * Discard all response content returned from * the daemon process if any expected. */ if (!r->header_only && /* not HEAD request */ (status != HTTP_NO_CONTENT) && /* not 204 */ (status != HTTP_NOT_MODIFIED)) { /* not 304 */ wsgi_discard_output(bbin); apr_brigade_destroy(bbin); } return status; } /* Transfer any response content. */ return wsgi_transfer_response(r, bbin, group->response_buffer_size, group->response_socket_timeout); } static apr_status_t wsgi_socket_read(apr_socket_t *sock, void *vbuf, apr_size_t size) { char *buf = vbuf; apr_status_t rv; apr_size_t count = 0; apr_size_t len = 0; do { len = size - count; if ((rv = apr_socket_recv(sock, buf + count, &len)) != APR_SUCCESS) return rv; count += len; } while (count < size); return APR_SUCCESS; } static apr_status_t wsgi_read_strings(apr_socket_t *sock, char ***s, apr_pool_t *p) { apr_status_t rv; apr_size_t total; apr_size_t n; apr_size_t i; apr_size_t l; char *buffer; char *offset; if ((rv = wsgi_socket_read(sock, &total, sizeof(total))) != APR_SUCCESS) return rv; buffer = apr_palloc(p, total); offset = buffer; if ((rv = wsgi_socket_read(sock, buffer, total)) != APR_SUCCESS) return rv; memcpy(&n, offset, sizeof(n)); offset += sizeof(n); *s = apr_pcalloc(p, (n+1)*sizeof(**s)); for (i = 0; i < n; i++) { l = strlen(offset) + 1; (*s)[i] = offset; offset += l; } return APR_SUCCESS; } static apr_status_t wsgi_read_request(apr_socket_t *sock, request_rec *r) { int rv; char **vars; /* Read subprocess environment from request object. */ rv = wsgi_read_strings(sock, &vars, r->pool); if (rv != APR_SUCCESS) return rv; while (*vars) { char *key = *vars++; apr_table_setn(r->subprocess_env, key, *vars++); } return APR_SUCCESS; } static ap_filter_rec_t *wsgi_header_filter_handle; static apr_status_t wsgi_header_filter(ap_filter_t *f, apr_bucket_brigade *b) { request_rec *r = f->r; struct iovec vec1[4]; apr_bucket_brigade *b2; char crlf[] = CRLF; apr_size_t buflen; const apr_array_header_t *elts; const apr_table_entry_t *t_elt; const apr_table_entry_t *t_end; struct iovec *vec2; struct iovec *vec2_next; /* Output status line. */ vec1[0].iov_base = (void *)"Status:"; vec1[0].iov_len = strlen(“Status:”); vec1[1].iov_base = (void *)" "; vec1[1].iov_len = sizeof(" ") - 1; vec1[2].iov_base = (void *)(r->status_line); vec1[2].iov_len = strlen(r->status_line); vec1[3].iov_base = (void *)CRLF; vec1[3].iov_len = sizeof(CRLF) - 1; b2 = apr_brigade_create(r->pool, r->connection->bucket_alloc); apr_brigade_writev(b2, NULL, NULL, vec1, 4); /* Merge response header tables together. */ if (!apr_is_empty_table(r->err_headers_out)) { r->headers_out = apr_table_overlay(r->pool, r->err_headers_out, r->headers_out); } /* Override the content type for response. */ if (r->content_type) apr_table_setn(r->headers_out, "Content-Type", r->content_type); /* Formt the response headers for output. */ elts = apr_table_elts(r->headers_out); if (elts->nelts != 0) { t_elt = (const apr_table_entry_t *)(elts->elts); t_end = t_elt + elts->nelts; vec2 = (struct iovec *)apr_palloc(r->pool, 4 * elts->nelts * sizeof(struct iovec)); vec2_next = vec2; do { vec2_next->iov_base = (void*)(t_elt->key); vec2_next->iov_len = strlen(t_elt->key); vec2_next++; vec2_next->iov_base = ": "; vec2_next->iov_len = sizeof(": ") - 1; vec2_next++; vec2_next->iov_base = (void*)(t_elt->val); vec2_next->iov_len = strlen(t_elt->val); vec2_next++; vec2_next->iov_base = CRLF; vec2_next->iov_len = sizeof(CRLF) - 1; vec2_next++; t_elt++; } while (t_elt < t_end); apr_brigade_writev(b2, NULL, NULL, vec2, vec2_next - vec2); } /* Format terminating blank line for response headers. */ buflen = strlen(crlf); apr_brigade_write(b2, NULL, NULL, crlf, buflen); /* Output the response headers. */ ap_pass_brigade(f->next, b2); /* Remove ourselves from filter chain so we aren’t called again. */ ap_remove_output_filter(f); /* Output the partial response content. */ return ap_pass_brigade(f->next, b); } typedef struct cve_2013_5704_fields cve_2013_5704_fields; typedef struct cve_2013_5704_apache22 cve_2013_5704_apache22; typedef struct cve_2013_5704_apache24 cve_2013_5704_apache24; struct cve_2013_5704_fields { apr_table_t *trailers_in; apr_table_t *trailers_out; }; struct cve_2013_5704_apache22 { struct ap_filter_t *proto_input_filters; int eos_sent; cve_2013_5704_fields fields; }; struct cve_2013_5704_apache24 { apr_sockaddr_t *useragent_addr; char *useragent_ip; cve_2013_5704_fields fields; }; static int wsgi_hook_daemon_handler(conn_rec *c) { apr_socket_t *csd; request_rec *r; apr_pool_t *p; apr_status_t rv; char *key; apr_sockaddr_t *addr; const char *filename; const char *script; const char *magic; const char *hash; WSGIRequestConfig *config; apr_bucket *e; apr_bucket_brigade *bb; core_request_config *req_cfg; ap_filter_t *current = NULL; ap_filter_t *next = NULL; const char *item; int queue_timeout_occurred = 0; apr_time_t daemon_start = 0; #if ! (AP_MODULE_MAGIC_AT_LEAST(20120211, 37) || \ (AP_SERVER_MAJORVERSION_NUMBER == 2 && \ AP_SERVER_MINORVERSION_NUMBER <= 2 && \ AP_MODULE_MAGIC_AT_LEAST(20051115, 36))) apr_size_t size = 0; #endif /* Don’t do anything if not in daemon process. */ if (!wsgi_daemon_pool) return DECLINED; /* * Mark this as start of daemon process even though connection * setup has already been done. Otherwise need to carry through * a time value somehow. */ daemon_start = apr_time_now(); /* * Remove all input/output filters except the core filters. * This will ensure that any SSL filters we don’t want are * removed. This is a bit of a hack. Only other option is to * duplicate the code for core input/output filters so can * avoid full Apache connection processing, which is what is * installed the SSL filters and possibly other filters for * logging etc. */ current = c->input_filters; next = current->next; while (current) { if (current->frec == ap_core_input_filter_handle) { current = next; if (!current) break; next = current->next; continue; } ap_remove_input_filter(current); current = next; if (current) next = current->next; } current = c->output_filters; next = current->next; while (current) { if (current->frec == ap_core_output_filter_handle) { current = next; if (!current) break; next = current->next; continue; } ap_remove_output_filter(current); current = next; if (current) next = current->next; } /* * Create and populate our own request object. We allocate more * memory than we require here for the request_rec in order to * implement an opimistic hack for the case where mod_wsgi is built * against an Apache version prior to CVE-2013-6704 being applied to * it. If that Apache is upgraded but mod_wsgi not recompiled then * it will crash in daemon mode. We therefore use the extra space to * set the structure members which are added by CVE-2013-6704 to try * and avoid that situation. Note that this is distinct from the * hack down below to deal with where mod_wsgi was compiled against * an Apache version which had CVE-2013-6704 backported. */ apr_pool_create(&p, c->pool); r = apr_pcalloc(p, sizeof(request_rec)+sizeof(cve_2013_5704_fields)); r->pool = p; r->connection = c; r->server = c->base_server; r->user = NULL; r->ap_auth_type = NULL; r->allowed_methods = ap_make_method_list(p, 2); r->headers_in = apr_table_make(r->pool, 25); r->subprocess_env = apr_table_make(r->pool, 25); r->headers_out = apr_table_make(r->pool, 12); r->err_headers_out = apr_table_make(r->pool, 5); r->notes = apr_table_make(r->pool, 5); r->request_config = ap_create_request_config(r->pool); r->proto_output_filters = c->output_filters; r->output_filters = r->proto_output_filters; r->proto_input_filters = c->input_filters; r->input_filters = r->proto_input_filters; #if AP_MODULE_MAGIC_AT_LEAST(20120211, 37) || \ (AP_SERVER_MAJORVERSION_NUMBER == 2 && \ AP_SERVER_MINORVERSION_NUMBER <= 2 && \ AP_MODULE_MAGIC_AT_LEAST(20051115, 36)) /* * New request_rec fields were added to Apache because of changes * related to CVE-2013-5704. The change means that mod_wsgi version * 4.4.0-4.4.5 will crash if run on the Apache versions with the * addition fields if mod_wsgi daemon mode is used. If we are using * Apache 2.2.29 or 2.4.11, we set the fields direct against the * new structure members. */ r->trailers_in = apr_table_make(r->pool, 5); r->trailers_out = apr_table_make(r->pool, 5); #else /* * We use a huge hack here to try and identify when CVE-2013-5704 * has been back ported to older Apache version. This is necessary * as when backported the Apache module magic number will not be * updated and it isn’t possible to determine from that at compile * time if the new structure members exist and so that they should * be set. We therefore try and work out whether the extra structure * members exist through looking at the size of request_rec and * whether memory has been allocated above what is known to be the * last member in the structure before the new members were added. */ #if AP_SERVER_MINORVERSION_NUMBER <= 2 size = offsetof(request_rec, eos_sent); size += sizeof(r->eos_sent); #else size = offsetof(request_rec, useragent_ip); size += sizeof(r->useragent_ip); #endif /* * Check whether request_rec is at least as large as minimal size * plus the size of the extra fields. If it is, then we need to * set the additional fields. */ if (sizeof(request_rec) >= size + sizeof(cve_2013_5704_fields)) { #if AP_SERVER_MINORVERSION_NUMBER <= 2 cve_2013_5704_apache22 *rext; rext = (cve_2013_5704_apache22 *)&r->proto_input_filters; #else cve_2013_5704_apache24 *rext; rext = (cve_2013_5704_apache24 *)&r->useragent_addr; #endif rext->fields.trailers_in = apr_table_make(r->pool, 5); rext->fields.trailers_out = apr_table_make(r->pool, 5); } else { /* * Finally, to allow forward portability of a compiled mod_wsgi * binary from an Apache version without the CVE-2013-5704 * change to one where it is, without needing to recompile * mod_wsgi, we set fields in the extra memory we added before * the actual request_rec. */ cve_2013_5704_fields *rext; rext = (cve_2013_5704_fields *)(r+1); rext->trailers_in = apr_table_make(r->pool, 5); rext->trailers_out = apr_table_make(r->pool, 5); } #endif r->per_dir_config = r->server->lookup_defaults; r->sent_bodyct = 0; r->read_length = 0; r->read_body = REQUEST_NO_BODY; r->status = HTTP_OK; r->status_line = NULL; r->the_request = NULL; r->used_path_info = AP_REQ_DEFAULT_PATH_INFO; /* * Install our own output filter for writing back headers in * CGI script style. */ ap_add_output_filter_handle(wsgi_header_filter_handle, NULL, r, r->connection); /* Create and install the WSGI request config. */ config = (WSGIRequestConfig *)apr_pcalloc(r->pool, sizeof(WSGIRequestConfig)); ap_set_module_config(r->request_config, &wsgi_module, (void *)config); /* Grab the socket from the connection core config. */ csd = ap_get_module_config(c->conn_config, &core_module); /* * Fake up parts of the internal per request core * configuration. If we don’t do this then when Apache is * compiled with the symbol AP_DEBUG, internal checks made * by Apache will result in process crashing. */ req_cfg = apr_pcalloc(r->pool, sizeof(core_request_config)); req_cfg->bb = apr_brigade_create(r->pool, r->connection->bucket_alloc); ap_set_module_config(r->request_config, &core_module, req_cfg); /* Read in the request details and setup request object. */ if ((rv = wsgi_read_request(csd, r)) != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_CRIT, rv, wsgi_server, "mod_wsgi (pid=%d): Unable to read WSGI request.", getpid()); apr_pool_destroy§; return HTTP_INTERNAL_SERVER_ERROR; } /* Check magic marker used to validate origin of request. */ filename = apr_table_get(r->subprocess_env, “SCRIPT_FILENAME”); script = apr_table_get(r->subprocess_env, “mod_wsgi.handler_script”); magic = apr_table_get(r->subprocess_env, “mod_wsgi.magic”); if (!magic) { ap_log_error(APLOG_MARK, APLOG_ALERT, rv, wsgi_server, "mod_wsgi (pid=%d): Request origin could not be " "validated.", getpid()); apr_pool_destroy§; return HTTP_INTERNAL_SERVER_ERROR; } key = apr_psprintf(r->pool, "%ld|%s|%s|%s", wsgi_daemon_process->group->random, wsgi_daemon_process->group->socket_path, filename, script); hash = ap_md5(r->pool, (const unsigned char *)key); memset(key, '\0’, strlen(key)); if (strcmp(magic, hash) != 0) { ap_log_error(APLOG_MARK, APLOG_ALERT, rv, wsgi_server, "mod_wsgi (pid=%d): Request origin could not be " "validated.", getpid()); apr_pool_destroy§; return HTTP_INTERNAL_SERVER_ERROR; } apr_table_unset(r->subprocess_env, “mod_wsgi.magic”); /* * If we are executing in a chroot environment, we need to * adjust SCRIPT_FILENAME to remove leading portion of path * that corresponds to the location of the chroot directory. * Also need to adjust DOCUMENT_ROOT as well, although in * that case if it doesn’t actually fall within the choot * directory, we just delete it outright as would be incorrect * if that directory lay outside of the chroot directory. */ if (wsgi_daemon_process->group->root) { const char *root; const char *path; root = wsgi_daemon_process->group->root; path = filename; if (strstr(path, root) == path && path[strlen(root)] == ‘/’) { path += strlen(root); apr_table_set(r->subprocess_env, "SCRIPT_FILENAME", path); filename = path; } else { ap_log_error(APLOG_MARK, APLOG_CRIT, rv, wsgi_server, "mod_wsgi (pid=%d): WSGI script ‘%s’ not located " "within chroot directory '%s’.", getpid(), path, root); return HTTP_INTERNAL_SERVER_ERROR; } path = (char *)apr_table_get(r->subprocess_env, “DOCUMENT_ROOT”); if (strstr(path, root) == path) { path += strlen(root); apr_table_set(r->subprocess_env, "DOCUMENT_ROOT", path); } else { apr_table_unset(r->subprocess_env, “DOCUMENT_ROOT”); } } r->filename = (char *)filename; /* Recalculate WSGI script or handler script modification time. */ if (script && *script) { if ((rv = apr_stat(&r->finfo, script, APR_FINFO_NORM, r->pool)) != APR_SUCCESS) { /* * Don’t fail at this point. Allow the lack of file to * be detected later when trying to load the script file. */ ap_log_error(APLOG_MARK, APLOG_WARNING, rv, wsgi_server, "mod_wsgi (pid=%d): Unable to stat target handler " "script '%s’.", getpid(), script); r->finfo.mtime = 0; } } else { if ((rv = apr_stat(&r->finfo, filename, APR_FINFO_NORM, r->pool)) != APR_SUCCESS) { /* * Don’t fail at this point. Allow the lack of file to * be detected later when trying to load the script file. */ ap_log_error(APLOG_MARK, APLOG_WARNING, rv, wsgi_server, "mod_wsgi (pid=%d): Unable to stat target WSGI " "script '%s’.", getpid(), filename); r->finfo.mtime = 0; } } /* * Trigger mapping of host information to server configuration * so that when logging errors they go to the correct error log * file for the host. */ #if AP_MODULE_MAGIC_AT_LEAST(20111130,0) r->connection->client_ip = (char *)apr_table_get(r->subprocess_env, “REMOTE_ADDR”); r->connection->client_addr->port = atoi(apr_table_get(r->subprocess_env, “REMOTE_PORT”)); #else r->connection->remote_ip = (char *)apr_table_get(r->subprocess_env, “REMOTE_ADDR”); r->connection->remote_addr->port = atoi(apr_table_get(r->subprocess_env, “REMOTE_PORT”)); #endif #if AP_MODULE_MAGIC_AT_LEAST(20111130,0) r->useragent_addr = c->client_addr; r->useragent_ip = c->client_ip; #endif key = apr_psprintf(p, "%s|%s", apr_table_get(r->subprocess_env, “mod_wsgi.listener_host”), apr_table_get(r->subprocess_env, “mod_wsgi.listener_port”)); if (wsgi_server_config->verbose_debugging) { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Server listener address '%s’.", getpid(), key); } addr = (apr_sockaddr_t *)apr_hash_get(wsgi_daemon_listeners, key, APR_HASH_KEY_STRING); if (wsgi_server_config->verbose_debugging) { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, “mod_wsgi (pid=%d): Server listener address ‘%s’ was” “%s found.", getpid(), key, addr ? “” : " not”); } if (addr) { c->local_addr = addr; } ap_update_vhost_given_ip(r->connection); if (wsgi_server_config->verbose_debugging) { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Connection server matched was " "’%s|%d’.", getpid(), c->base_server->server_hostname, c->base_server->port); } r->server = c->base_server; if (apr_table_get(r->subprocess_env, “HTTP_HOST”)) { apr_table_setn(r->headers_in, "Host", apr_table_get(r->subprocess_env, “HTTP_HOST”)); } ap_update_vhost_from_headers®; if (wsgi_server_config->verbose_debugging) { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, wsgi_server, "mod_wsgi (pid=%d): Request server matched was '%s|%d’.", getpid(), r->server->server_hostname, r->server->port); } /* * Set content length of any request content and add the * standard HTTP input filter so that standard input routines * for request content will work. */ item = apr_table_get(r->subprocess_env, “CONTENT_LENGTH”); if (item) apr_table_setn(r->headers_in, "Content-Length", item); /* Set details of WSGI specific request config. */ config->process_group = apr_table_get(r->subprocess_env, “mod_wsgi.process_group”); config->application_group = apr_table_get(r->subprocess_env, “mod_wsgi.application_group”); config->callable_object = apr_table_get(r->subprocess_env, “mod_wsgi.callable_object”); config->handler_script = apr_table_get(r->subprocess_env, “mod_wsgi.handler_script”); config->script_reloading = atoi(apr_table_get(r->subprocess_env, “mod_wsgi.script_reloading”)); item = apr_table_get(r->subprocess_env, “mod_wsgi.enable_sendfile”); if (item && !strcasecmp(item, “1”)) config->enable_sendfile = 1; else config->enable_sendfile = 0; item = apr_table_get(r->subprocess_env, “mod_wsgi.ignore_activity”); if (item && !strcasecmp(item, “1”)) config->ignore_activity = 1; else config->ignore_activity = 0; config->daemon_connects = atoi(apr_table_get(r->subprocess_env, “mod_wsgi.daemon_connects”)); config->daemon_restarts = atoi(apr_table_get(r->subprocess_env, “mod_wsgi.daemon_restarts”)); item = apr_table_get(r->subprocess_env, “mod_wsgi.request_start”); if (item) { errno = 0; config->request_start = apr_strtoi64(item, (char **)&item, 10); if (!*item && errno != ERANGE) r->request_time = config->request_start; else config->request_start = 0.0; } item = apr_table_get(r->subprocess_env, “mod_wsgi.queue_start”); if (item) { errno = 0; config->queue_start = apr_strtoi64(item, (char **)&item, 10); if (!(!*item && errno != ERANGE)) config->queue_start = 0.0; } config->daemon_start = daemon_start; apr_table_setn(r->subprocess_env, "mod_wsgi.daemon_start", apr_psprintf(r->pool, “%” APR_TIME_T_FMT, config->daemon_start)); #if AP_MODULE_MAGIC_AT_LEAST(20100923,2) item = apr_table_get(r->subprocess_env, “mod_wsgi.request_id”); if (item) r->log_id = item; item = apr_table_get(r->subprocess_env, “mod_wsgi.connection_id”); if (item) r->connection->log_id = item; #endif /* * Install the standard HTTP input filter and set header for * chunked transfer encoding to force it to dechunk the input. * This is necessary as we chunk the data that is proxied to * the daemon processes so that we can determining whether we * actually receive all input or it was truncated. * * Note that the subprocess_env table that gets passed to the * WSGI environ dictionary has already been populated, so the * Transfer-Encoding header will not be passed in the WSGI * environ dictionary as a result of this. */ apr_table_setn(r->headers_in, "Transfer-Encoding", “chunked”); ap_add_input_filter("HTTP_IN", NULL, r, r->connection); /* Check for queue timeout. */ r->status = HTTP_OK; if (wsgi_daemon_process->group->queue_timeout) { if (config->request_start) { apr_time_t queue_time = 0; queue_time = config->daemon_start - config->request_start; if (queue_time > wsgi_daemon_process->group->queue_timeout) { queue_timeout_occurred = 1; r->status = HTTP_INTERNAL_SERVER_ERROR; r->status_line = "200 Timeout"; ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): Queue timeout expired " "for WSGI daemon process '%s’.", getpid(), wsgi_daemon_process->group->name); } } } /* * Execute the actual target WSGI application. In * normal cases OK should always be returned. If * however an error occurs in importing or executing * the script or the Python code raises an exception * which is not caught and handled, then an internal * server error can be returned. As we don’t want to * be triggering any error document handlers in the * daemon process we use a fake status line with 0 * as the status value. This will be picked up in * the Apache child process which will translate it * back to a 500 error so that normal error document * processing occurs. */ if (!queue_timeout_occurred) { if (wsgi_execute_script® != OK) { r->status = HTTP_INTERNAL_SERVER_ERROR; r->status_line = "200 Error"; } } /* * Ensure that request is finalised and any response * is flushed out. This will as a side effect read * any input data which wasn’t consumed, thus * ensuring that the Apache child process isn’t hung * waiting to send the request content and can * therefore process the response correctly. */ ap_finalize_request_protocol®; bb = apr_brigade_create(r->pool, c->bucket_alloc); e = apr_bucket_flush_create(c->bucket_alloc); APR_BRIGADE_INSERT_HEAD(bb, e); ap_pass_brigade(r->connection->output_filters, bb); apr_pool_destroy§; return OK; } #endif /* * Apache 2.X module initialisation functions. */ static int wsgi_hook_init(apr_pool_t *pconf, apr_pool_t *ptemp, apr_pool_t *plog, server_rec *s) { void *data = NULL; const char *userdata_key; char package[128]; char interpreter[256]; int status = OK; /* * No longer support using mod_python at the same time as * mod_wsgi as becoming too painful to hack around * mod_python’s broken usage of threading APIs when align * code to the stricter API requirements of Python 3.2. */ userdata_key = "python_init"; apr_pool_userdata_get(&data, userdata_key, s->process->pool); if (data) { ap_log_error(APLOG_MARK, APLOG_CRIT, 0, NULL, "mod_wsgi (pid=%d): The mod_python module can " "not be used in conjunction with mod_wsgi 4.0+. " "Remove the mod_python module from the Apache " "configuration.", getpid()); return HTTP_INTERNAL_SERVER_ERROR; } /* * Init function gets called twice during startup, we only * need to actually do anything on the second time it is * called. This avoids unecessarily initialising and then * destroying Python for no reason. We also though have to * deal with a special case when a graceful restart is done. * For that we are only called once, which is generally okay * as the ‘wsgi_init’ key will be set from initial start up * of the server. The exception to this is where the module * is only loaded into Apache when the server is already * running. In this case we have to detect that it is not * the initial startup, but a subsequent restart. We can do * this by looking at whether the scoreboard has been * initialised yet. That is probably enough, but to be safe, * also check what generation it is. */ userdata_key = "wsgi_init"; apr_pool_userdata_get(&data, userdata_key, s->process->pool); if (!data) { apr_pool_userdata_set((const void *)1, userdata_key, apr_pool_cleanup_null, s->process->pool); /* * Check for the special case of a graceful restart and * the module being loaded for the first time. In this * case we still go onto perform initialisation as the * initialisation routine for the module will not be * called a second time. */ if (!ap_scoreboard_image || ap_get_scoreboard_global()->running_generation == 0) { return OK; } } /* Setup module version information. */ sprintf(package, "mod_wsgi/%s", MOD_WSGI_VERSION_STRING); ap_add_version_component(pconf, package); /* Record Python version string with Apache. */ sprintf(interpreter, "Python/%d.%d", PY_MAJOR_VERSION, PY_MINOR_VERSION); ap_add_version_component(pconf, interpreter); /* Retain reference to base server. */ wsgi_server = s; /* Retain record of parent process ID. */ wsgi_parent_pid = getpid(); /* Determine whether multiprocess and/or multithread. */ ap_mpm_query(AP_MPMQ_IS_THREADED, &wsgi_multithread); if (wsgi_multithread != AP_MPMQ_NOT_SUPPORTED) { ap_mpm_query(AP_MPMQ_MAX_THREADS, &wsgi_multithread); wsgi_multithread = (wsgi_multithread != 1); } ap_mpm_query(AP_MPMQ_IS_FORKED, &wsgi_multiprocess); if (wsgi_multiprocess != AP_MPMQ_NOT_SUPPORTED) { ap_mpm_query(AP_MPMQ_MAX_DAEMONS, &wsgi_multiprocess); wsgi_multiprocess = (wsgi_multiprocess != 1); } /* Retain reference to main server config. */ wsgi_server_config = ap_get_module_config(s->module_config, &wsgi_module); /* * Check that the version of Python found at * runtime is what was used at compilation. * * XXX Can’t do this as will cause Anaconda * Python to fail as not safe to call the * Py_GetVersion() function before one calls * the Py_Initialize() function when using * Anaconda Python. */ #if 0 wsgi_python_version(); #endif /* * Initialise Python if required to be done in * the parent process. Note that it will not be * initialised if mod_python loaded and it has * already been done. */ if (wsgi_python_required == -1) wsgi_python_required = 1; if (!wsgi_python_after_fork) wsgi_python_init(pconf); /* * Startup separate named daemon processes. This is * a bit tricky as we only want to do this after the * scoreboard has been created. On the initial server * startup though, this hook function is called prior * to the MPM being run, which means the scoreboard * hasn’t been created yet. In that case we need to * defer process creation until after that, which we * can only do by hooking into the pre_mpm hook after * scoreboard creation has been done. On a server * restart, the scoreboard will be preserved, so we * can do it here, which is just as well as the pre_mpm * hook isn’t run on a restart. */ #if defined(MOD_WSGI_WITH_DAEMONS) if (!ap_scoreboard_image) { /* * Need to remember the pool we were given here as * the pre_mpm hook functions get given a different * pool which isn’t the one we want and if we use * that then Apache will crash when it is being * shutdown. So our pre_mpm hook will use the pool * we have remembered here. */ wsgi_pconf_pool = pconf; ap_hook_pre_mpm(wsgi_deferred_start_daemons, NULL, NULL, APR_HOOK_REALLY_LAST); } else status = wsgi_start_daemons(pconf); #endif return status; } static void wsgi_hook_child_init(apr_pool_t *p, server_rec *s) { #if defined(MOD_WSGI_WITH_DAEMONS) WSGIProcessGroup *entries = NULL; WSGIProcessGroup *entry = NULL; int i; /* Close listener sockets for daemon processes. */ if (wsgi_daemon_list) { entries = (WSGIProcessGroup *)wsgi_daemon_list->elts; for (i = 0; i < wsgi_daemon_list->nelts; ++i) { entry = &entries[i]; if (entry->listener_fd != -1) { close(entry->listener_fd); entry->listener_fd = -1; } } } #endif /* Remember worker process ID. */ wsgi_worker_pid = getpid(); /* Time child process started waiting for requests. */ wsgi_restart_time = apr_time_now(); /* Create lock for request monitoring. */ apr_thread_mutex_create(&wsgi_monitor_lock, APR_THREAD_MUTEX_UNNESTED, p); if (wsgi_python_required) { /* * Initialise Python if required to be done in * the child process. Note that it will not be * initialised if mod_python loaded and it has * already been done. */ if (wsgi_python_after_fork) wsgi_python_init§; /* * Now perform additional initialisation steps * always done in child process. */ wsgi_python_child_init§; } } #include “apr_lib.h” static char *wsgi_original_uri(request_rec *r) { char *first, *last; if (r->the_request == NULL) { return (char *) apr_pcalloc(r->pool, 1); } first = r->the_request; /* use the request-line */ while (*first && !apr_isspace(*first)) { ++first; /* skip over the method */ } while (apr_isspace(*first)) { ++first; /* and the space(s) */ } last = first; while (*last && !apr_isspace(*last)) { ++last; /* end at next whitespace */ } return apr_pstrmemdup(r->pool, first, last - first); } static int wsgi_http_invalid_header(const char *w) { char c; while ((c = *w++) != 0) { if (!apr_isalnum© && c != '-') return 1; } return 0; } static void wsgi_drop_invalid_headers(request_rec *r) { /* * Apache 2.2 when converting headers for CGI variables, doesn’t * ignore headers with invalid names. That is, any which use any * characters besides alphanumerics and the '-' character. This * opens us up to header spoofing whereby something can inject * multiple headers which differ by using non alphanumeric * characters in the same position, which would then encode to same * value. Since not easy to cleanup after the fact, as a workaround, * is easier to simply remove the invalid headers. This will make * things end up being the same as Apache 2.4. Doing this could * annoy some users of Apache 2.2 who were using invalid headers, * but things will break for them under Apache 2.4 anyway. */ apr_array_header_t *to_delete = NULL; const apr_array_header_t *hdrs_arr; const apr_table_entry_t *hdrs; int i; hdrs_arr = apr_table_elts(r->headers_in); hdrs = (const apr_table_entry_t *) hdrs_arr->elts; for (i = 0; i < hdrs_arr->nelts; ++i) { if (!hdrs[i].key) { continue; } if (wsgi_http_invalid_header(hdrs[i].key)) { char **new; if (!to_delete) to_delete = apr_array_make(r->pool, 1, sizeof(char *)); new = (char **)apr_array_push(to_delete); *new = hdrs[i].key; } } if (to_delete) { char *key; for (i = 0; i < to_delete->nelts; i++) { key = ((char **)to_delete->elts)[i]; apr_table_unset(r->headers_in, key); } } } static const char *wsgi_proxy_client_headers[] = { "HTTP_X_FORWARDED_FOR", "HTTP_X_CLIENT_IP", "HTTP_X_REAL_IP", NULL, }; static const char *wsgi_proxy_scheme_headers[] = { "HTTP_X_FORWARDED_HTTPS", "HTTP_X_FORWARDED_PROTO", "HTTP_X_FORWARDED_SCHEME", "HTTP_X_FORWARDED_SSL", "HTTP_X_HTTPS", "HTTP_X_SCHEME", NULL, }; static const char *wsgi_proxy_host_headers[] = { "HTTP_X_FORWARDED_HOST", "HTTP_X_HOST", NULL, }; static const char *wsgi_proxy_script_name_headers[] = { "HTTP_X_SCRIPT_NAME", "HTTP_X_FORWARDED_SCRIPT_NAME", NULL, }; static int wsgi_ip_is_in_array(apr_sockaddr_t *client_ip, apr_array_header_t *proxy_ips) { int i; apr_ipsubnet_t **subs = (apr_ipsubnet_t **)proxy_ips->elts; for (i = 0; i < proxy_ips->nelts; i++) { if (apr_ipsubnet_test(subs[i], client_ip)) { return 1; } } return 0; } static void wsgi_process_forwarded_for(request_rec *r, WSGIRequestConfig *config, const char *value ) { if (config->trusted_proxies) { /* * A potentially comma separated list where client we are * interested in will be that immediately before the last * trusted proxy working from the end forwards. If there * are no trusted proxies then we use the last. */ apr_array_header_t *arr; arr = apr_array_make(r->pool, 3, sizeof(char *)); while (*value != ‘\0’) { /* Skip leading whitespace for item. */ while (*value != ‘\0’ && apr_isspace(*value)) value++; if (*value != ‘\0’) { const char *end = NULL; const char *next = NULL; char **entry = NULL; end = value; while (*end != ‘\0’ && *end != ‘,’) end++; if (*end == ‘\0’) next = end; else if (*end == ‘,’) next = end+1; /* Need deal with trailing whitespace. */ while (end != value) { if (!apr_isspace(*(end-1))) break; end–; } entry = (char **)apr_array_push(arr); *entry = apr_pstrndup(r->pool, value, (end-value)); value = next; } } if (arr->nelts != 0) { /* HTTP_X_FORDWARDED_FOR wasn’t just an empty string. */ char **items; int first = -1; int i; items = (char **)arr->elts; /* * Work out the position of the IP closest to the start * that we actually trusted. */ for (i=arr->nelts; i>0; ) { apr_sockaddr_t *sa; apr_status_t rv; i–; rv = apr_sockaddr_info_get(&sa, items[i], APR_UNSPEC, 0, 0, r->pool); if (rv == APR_SUCCESS) { if (!wsgi_ip_is_in_array(sa, config->trusted_proxies)) break; first = i; } else { ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_DEBUG, 0, r, “mod_wsgi (pid=%d): Forwarded IP of \"%s\” is " "not a valid IP address.", getpid(), items[i]); break; } } if (first >= 0) { /* * We found at least one trusted IP. We use the * IP that may have appeared before that as * REMOTE_ADDR. We rewrite HTTP_X_FORWARDED_FOR * to record only from REMOTE_ADDR onwards. */ char *list; i = first-1; if (i<0) i = 0; apr_table_setn(r->subprocess_env, "REMOTE_ADDR", items[i]); list = items[i]; i++; while (arr->nelts != i) { list = apr_pstrcat(r->pool, list, ", ", items[i], NULL); i++; } apr_table_setn(r->subprocess_env, "HTTP_X_FORWARDED_FOR", list); } else { /* * No trusted IP. Use the last for REMOTE_ADDR. * We rewrite HTTP_X_FORWARDED_FOR to record only * the last. */ apr_table_setn(r->subprocess_env, "REMOTE_ADDR", items[arr->nelts-1]); apr_table_setn(r->subprocess_env, "HTTP_X_FORWARDED_FOR", items[arr->nelts-1]); } } } else { /* * We do not need to validate the proxies. We will have a * potentially comma separated list where the client we * are interested in will be listed first. */ const char *end = NULL; /* Skip leading whitespace for item. */ while (*value != ‘\0’ && apr_isspace(*value)) value++; if (*value != ‘\0’) { end = value; while (*end != ‘\0’ && *end != ‘,’) end++; /* Need deal with trailing whitespace. */ while (end != value) { if (!apr_isspace(*(end-1))) break; end–; } /* Override REMOTE_ADDR. Leave HTTP_X_FORWARDED_FOR. */ apr_table_setn(r->subprocess_env, "REMOTE_ADDR", apr_pstrndup(r->pool, value, (end-value))); } } } static void wsgi_process_proxy_headers(request_rec *r) { WSGIRequestConfig *config = NULL; apr_array_header_t *trusted_proxy_headers = NULL; int match_client_header = 0; int match_host_header = 0; int match_script_name_header = 0; int match_scheme_header = 0; const char *trusted_client_header = NULL; const char *trusted_host_header = NULL; const char *trusted_script_name_header = NULL; const char *trusted_scheme_header = NULL; int i = 0; int trusted_proxy = 1; const char *client_ip = NULL; apr_status_t rv; config = (WSGIRequestConfig *)ap_get_module_config(r->request_config, &wsgi_module); trusted_proxy_headers = config->trusted_proxy_headers; /* Nothing to do if no trusted headers have been specified. */ if (!trusted_proxy_headers) return; /* * Check for any special processing required for each trusted * header which has been specified. We should only do this if * there was no list of trusted proxies, or if the client IP * was that of a trusted proxy. */ if (config->trusted_proxies) { client_ip = apr_table_get(r->subprocess_env, “REMOTE_ADDR”); if (client_ip) { apr_sockaddr_t *sa; rv = apr_sockaddr_info_get(&sa, client_ip, APR_UNSPEC, 0, 0, r->pool); if (rv == APR_SUCCESS) { if (!wsgi_ip_is_in_array(sa, config->trusted_proxies)) trusted_proxy = 0; } else { ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, “mod_wsgi (pid=%d): REMOTE_ADDR of \"%s\” is " "not a valid IP address.", getpid(), client_ip); trusted_proxy = 0; } } else trusted_proxy = 0; } if (trusted_proxy) { for (i=0; i<trusted_proxy_headers->nelts; i++) { const char *name; const char *value; name = ((const char**)trusted_proxy_headers->elts)[i]; value = apr_table_get(r->subprocess_env, name); if (!strcmp(name, “HTTP_X_FORWARDED_FOR”)) { match_client_header = 1; if (value) { wsgi_process_forwarded_for(r, config, value); trusted_client_header = name; } } else if (!strcmp(name, “HTTP_X_CLIENT_IP”) || !strcmp(name, “HTTP_X_REAL_IP”)) { match_client_header = 1; if (value) { /* Use the value as is. */ apr_table_setn(r->subprocess_env, "REMOTE_ADDR", value); trusted_client_header = name; } } else if (!strcmp(name, “HTTP_X_FORWARDED_HOST”) || !strcmp(name, “HTTP_X_HOST”)) { match_host_header = 1; if (value) { /* Use the value as is. May include a port. */ trusted_host_header = name; apr_table_setn(r->subprocess_env, "HTTP_HOST", value); } } else if (!strcmp(name, “HTTP_X_FORWARDED_SERVER”)) { if (value) { /* Use the value as is. */ apr_table_setn(r->subprocess_env, "SERVER_NAME", value); } } else if (!strcmp(name, “HTTP_X_FORWARDED_PORT”)) { if (value) { /* Use the value as is. */ apr_table_setn(r->subprocess_env, "SERVER_PORT", value); } } else if (!strcmp(name, “HTTP_X_SCRIPT_NAME”) || !strcmp(name, “HTTP_X_FORWARDED_SCRIPT_NAME”)) { match_script_name_header = 1; if (value) { /* * Use the value as is. We want to remember what the * original value for SCRIPT_NAME was though. */ apr_table_setn(r->subprocess_env, "mod_wsgi.mount_point", value); trusted_script_name_header = name; apr_table_setn(r->subprocess_env, "SCRIPT_NAME", value); } } else if (!strcmp(name, “HTTP_X_FORWARDED_PROTO”) || !strcmp(name, “HTTP_X_FORWARDED_SCHEME”) || !strcmp(name, “HTTP_X_SCHEME”)) { match_scheme_header = 1; if (value) { trusted_scheme_header = name; /* Value can be either ‘http’ or 'https’. */ if (!strcasecmp(value, “https”)) apr_table_setn(r->subprocess_env, "HTTPS", “1”); else if (!strcasecmp(value, “http”)) apr_table_unset(r->subprocess_env, “HTTPS”); } } else if (!strcmp(name, “HTTP_X_FORWARDED_HTTPS”) || !strcmp(name, “HTTP_X_FORWARDED_SSL”) || !strcmp(name, “HTTP_X_HTTPS”)) { match_scheme_header = 1; if (value) { trusted_scheme_header = name; /* * Value can be a boolean like flag such as 'On’, * 'Off’, 'true’, 'false’, ‘1’ or '0’. */ if (!strcasecmp(value, “On”) || !strcasecmp(value, “true”) || !strcasecmp(value, “1”)) { apr_table_setn(r->subprocess_env, "HTTPS", “1”); } else if (!strcasecmp(value, “Off”) || !strcasecmp(value, “false”) || !strcasecmp(value, “0”)) { apr_table_unset(r->subprocess_env, “HTTPS”); } } } } } else { /* * If it isn’t a trusted proxy, we still need to knock * out any headers for categories we were interested in. */ for (i=0; i<trusted_proxy_headers->nelts; i++) { const char *name; name = ((const char**)trusted_proxy_headers->elts)[i]; if (!strcmp(name, “HTTP_X_FORWARDED_FOR”) || !strcmp(name, “HTTP_X_REAL_IP”)) { match_client_header = 1; } else if (!strcmp(name, “HTTP_X_FORWARDED_HOST”) || !strcmp(name, “HTTP_X_HOST”)) { match_host_header = 1; } else if (!strcmp(name, “HTTP_X_SCRIPT_NAME”) || !strcmp(name, “HTTP_X_FORWARDED_SCRIPT_NAME”)) { match_script_name_header = 1; } else if (!strcmp(name, “HTTP_X_FORWARDED_PROTO”) || !strcmp(name, “HTTP_X_FORWARDED_SCHEME”) || !strcmp(name, “HTTP_X_SCHEME”) || !strcmp(name, “HTTP_X_FORWARDED_HTTPS”) || !strcmp(name, “HTTP_X_FORWARDED_SSL”) || !strcmp(name, “HTTP_X_HTTPS”)) { match_scheme_header = 1; } } } /* * Remove all client IP headers from request environment which * weren’t matched as being trusted. */ if (match_client_header) { const char *name = NULL; for (i=0; (name=wsgi_proxy_client_headers[i]); i++) { if (!trusted_client_header || strcmp(name, trusted_client_header)) { apr_table_unset(r->subprocess_env, name); } } } /* * Remove all proxy scheme headers from request environment * which weren’t matched as being trusted. */ if (match_scheme_header) { const char *name = NULL; for (i=0; (name=wsgi_proxy_scheme_headers[i]); i++) { if (!trusted_scheme_header || strcmp(name, trusted_scheme_header)) { apr_table_unset(r->subprocess_env, name); } } } /* * Remove all proxy host from request environment which weren’t * matched as being trusted. */ if (match_host_header) { const char *name = NULL; for (i=0; (name=wsgi_proxy_host_headers[i]); i++) { if (!trusted_host_header || strcmp(name, trusted_host_header)) apr_table_unset(r->subprocess_env, name); } } /* * Remove all proxy script name headers from request environment * which weren’t matched as being trusted. */ if (match_script_name_header) { const char *name = NULL; for (i=0; (name=wsgi_proxy_script_name_headers[i]); i++) { if (!trusted_script_name_header || strcmp(name, trusted_script_name_header)) { apr_table_unset(r->subprocess_env, name); } } } } static char *wsgi_http2env(apr_pool_t *a, const char *w) { char *res = (char *)apr_palloc(a, sizeof(“HTTP_”) + strlen(w)); char *cp = res; char c; *cp++ = 'H’; *cp++ = 'T’; *cp++ = 'T’; *cp++ = 'P’; *cp++ = '_’; while ((c = *w++) != 0) { if (apr_isalnum©) { *cp++ = apr_toupper©; } else if (c == '-') { *cp++ = '_’; } else return NULL; } *cp = 0; return res; } typedef struct { PyObject_HEAD request_rec *r; WSGIRequestConfig *config; PyObject *log; } AuthObject; static AuthObject *newAuthObject(request_rec *r, WSGIRequestConfig *config) { AuthObject *self; self = PyObject_New(AuthObject, &Auth_Type); if (self == NULL) return NULL; self->config = config; self->r = r; self->log = newLogObject(r, APLOG_ERR, NULL, 0); return self; } static void Auth_dealloc(AuthObject *self) { Py_DECREF(self->log); PyObject_Del(self); } static PyObject *Auth_environ(AuthObject *self, const char *group) { PyObject *vars; PyObject *object; request_rec *r = self->r; server_rec *s = r->server; conn_rec *c = r->connection; apr_port_t rport; const apr_array_header_t *hdrs_arr; const apr_table_entry_t *hdrs; const char *value = NULL; int i; vars = PyDict_New(); hdrs_arr = apr_table_elts(r->headers_in); hdrs = (const apr_table_entry_t *) hdrs_arr->elts; for (i = 0; i < hdrs_arr->nelts; ++i) { if (!hdrs[i].key) { continue; } if (!strcasecmp(hdrs[i].key, “Content-type”)) { #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(hdrs[i].val, strlen(hdrs[i].val), NULL); #else object = PyString_FromString(hdrs[i].val); #endif PyDict_SetItemString(vars, "CONTENT_TYPE", object); Py_DECREF(object); } else if (!strcasecmp(hdrs[i].key, “Content-length”)) { #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(hdrs[i].val, strlen(hdrs[i].val), NULL); #else object = PyString_FromString(hdrs[i].val); #endif PyDict_SetItemString(vars, "CONTENT_LENGTH", object); Py_DECREF(object); } else if (!strcasecmp(hdrs[i].key, “Authorization”) || !strcasecmp(hdrs[i].key, “Proxy-Authorization”)) { continue; } else { if (hdrs[i].val) { char *header = wsgi_http2env(r->pool, hdrs[i].key); if (header) { #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(hdrs[i].val, strlen(hdrs[i].val), NULL); #else object = PyString_FromString(hdrs[i].val); #endif PyDict_SetItemString(vars, header, object); Py_DECREF(object); } } } } value = ap_psignature("", r); #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "SERVER_SIGNATURE", object); Py_DECREF(object); #if AP_MODULE_MAGIC_AT_LEAST(20060905,0) value = ap_get_server_banner(); #else value = ap_get_server_version(); #endif #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "SERVER_SOFTWARE", object); Py_DECREF(object); value = ap_escape_html(r->pool, ap_get_server_name®); #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "SERVER_NAME", object); Py_DECREF(object); if (r->connection->local_ip) { value = r->connection->local_ip; #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "SERVER_ADDR", object); Py_DECREF(object); } value = apr_psprintf(r->pool, "%u", ap_get_server_port®); #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "SERVER_PORT", object); Py_DECREF(object); value = ap_get_remote_host(c, r->per_dir_config, REMOTE_HOST, NULL); if (value) { #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "REMOTE_HOST", object); Py_DECREF(object); } #if AP_MODULE_MAGIC_AT_LEAST(20111130,0) if (r->useragent_ip) { value = r->useragent_ip; #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "REMOTE_ADDR", object); Py_DECREF(object); } #else if (c->remote_ip) { value = c->remote_ip; #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "REMOTE_ADDR", object); Py_DECREF(object); } #endif #if PY_MAJOR_VERSION >= 3 value = ap_document_root®; object = PyUnicode_Decode(value, strlen(value), Py_FileSystemDefaultEncoding, “surrogateescape”); #else object = PyString_FromString(ap_document_root®); #endif PyDict_SetItemString(vars, "DOCUMENT_ROOT", object); Py_DECREF(object); if (s->server_admin) { value = s->server_admin; #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "SERVER_ADMIN", object); Py_DECREF(object); } #if AP_MODULE_MAGIC_AT_LEAST(20111130,0) rport = c->client_addr->port; value = apr_itoa(r->pool, rport); #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "REMOTE_PORT", object); Py_DECREF(object); #else rport = c->remote_addr->port; value = apr_itoa(r->pool, rport); #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "REMOTE_PORT", object); Py_DECREF(object); #endif value = r->protocol; #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "SERVER_PROTOCOL", object); Py_DECREF(object); value = r->method; #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "REQUEST_METHOD", object); Py_DECREF(object); value = r->args ? r->args : ""; #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "QUERY_STRING", object); Py_DECREF(object); value = wsgi_original_uri®; #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "REQUEST_URI", object); Py_DECREF(object); /* * XXX Apparently webdav does actually do modifications to * the uri and path_info attributes of request and they * could be used as part of authorisation. */ if (!strcmp(r->protocol, “INCLUDED”)) { value = r->uri; #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "SCRIPT_NAME", object); Py_DECREF(object); value = r->path_info ? r->path_info : ""; #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "PATH_INFO", object); Py_DECREF(object); } else if (!r->path_info || !*r->path_info) { value = r->uri; #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "SCRIPT_NAME", object); Py_DECREF(object); value = ""; #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "PATH_INFO", object); Py_DECREF(object); } else { int path_info_start = ap_find_path_info(r->uri, r->path_info); value = apr_pstrndup(r->pool, r->uri, path_info_start); #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "SCRIPT_NAME", object); Py_DECREF(object); value = r->path_info ? r->path_info : ""; #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else object = PyString_FromString(value); #endif PyDict_SetItemString(vars, "PATH_INFO", object); Py_DECREF(object); } object = Py_BuildValue("(iii)", AP_SERVER_MAJORVERSION_NUMBER, AP_SERVER_MINORVERSION_NUMBER, AP_SERVER_PATCHLEVEL_NUMBER); PyDict_SetItemString(vars, "apache.version", object); Py_DECREF(object); object = Py_BuildValue("(iii)", MOD_WSGI_MAJORVERSION_NUMBER, MOD_WSGI_MINORVERSION_NUMBER, MOD_WSGI_MICROVERSION_NUMBER); PyDict_SetItemString(vars, "mod_wsgi.version", object); Py_DECREF(object); #if PY_MAJOR_VERSION >= 3 object = PyUnicode_FromString(“”); #else object = PyString_FromString(“”); #endif PyDict_SetItemString(vars, "mod_wsgi.process_group", object); Py_DECREF(object); #if PY_MAJOR_VERSION >= 3 object = PyUnicode_DecodeLatin1(group, strlen(group), NULL); #else object = PyString_FromString(group); #endif PyDict_SetItemString(vars, "mod_wsgi.application_group", object); Py_DECREF(object); object = PyLong_FromLong(self->config->script_reloading); PyDict_SetItemString(vars, "mod_wsgi.script_reloading", object); Py_DECREF(object); /* * Setup log object for WSGI errors. Don’t decrement * reference to log object as keep reference to it. */ object = (PyObject *)self->log; PyDict_SetItemString(vars, "wsgi.errors", object); /* * If Apache extensions are enabled add a CObject reference * to the Apache request_rec structure instance. */ if (!wsgi_daemon_pool && self->config->pass_apache_request) { #if (PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >= 2) || \ (PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION >= 7) object = PyCapsule_New(self->r, 0, 0); #else object = PyCObject_FromVoidPtr(self->r, 0); #endif PyDict_SetItemString(vars, "apache.request_rec", object); Py_DECREF(object); } /* * Extensions for accessing SSL certificate information from * mod_ssl when in use. */ object = PyObject_GetAttrString((PyObject *)self, “ssl_is_https”); PyDict_SetItemString(vars, "mod_ssl.is_https", object); Py_DECREF(object); object = PyObject_GetAttrString((PyObject *)self, “ssl_var_lookup”); PyDict_SetItemString(vars, "mod_ssl.var_lookup", object); Py_DECREF(object); return vars; } static PyObject *Auth_ssl_is_https(AuthObject *self, PyObject *args) { APR_OPTIONAL_FN_TYPE(ssl_is_https) *ssl_is_https = 0; if (!self->r) { PyErr_SetString(PyExc_RuntimeError, “request object has expired”); return NULL; } if (!PyArg_ParseTuple(args, “:ssl_is_https”)) return NULL; ssl_is_https = APR_RETRIEVE_OPTIONAL_FN(ssl_is_https); if (ssl_is_https == 0) return Py_BuildValue("i", 0); return Py_BuildValue("i", ssl_is_https(self->r->connection)); } static PyObject *Auth_ssl_var_lookup(AuthObject *self, PyObject *args) { APR_OPTIONAL_FN_TYPE(ssl_var_lookup) *ssl_var_lookup = 0; PyObject *item = NULL; PyObject *latin_item = NULL; char *name = 0; char *value = 0; if (!self->r) { PyErr_SetString(PyExc_RuntimeError, “request object has expired”); return NULL; } if (!PyArg_ParseTuple(args, "O:ssl_var_lookup", &item)) return NULL; #if PY_MAJOR_VERSION >= 3 if (PyUnicode_Check(item)) { latin_item = PyUnicode_AsLatin1String(item); if (!latin_item) { PyErr_Format(PyExc_TypeError, "byte string value expected, " “value containing non ‘latin-1’ characters found”); return NULL; } item = latin_item; } #endif if (!PyString_Check(item)) { PyErr_Format(PyExc_TypeError, "byte string value expected, value " "of type %.200s found", item->ob_type->tp_name); Py_XDECREF(latin_item); return NULL; } name = PyString_AsString(item); ssl_var_lookup = APR_RETRIEVE_OPTIONAL_FN(ssl_var_lookup); if (ssl_var_lookup == 0) { Py_XDECREF(latin_item); Py_INCREF(Py_None); return Py_None; } value = ssl_var_lookup(self->r->pool, self->r->server, self->r->connection, self->r, name); Py_XDECREF(latin_item); if (!value) { Py_INCREF(Py_None); return Py_None; } #if PY_MAJOR_VERSION >= 3 return PyUnicode_DecodeLatin1(value, strlen(value), NULL); #else return PyString_FromString(value); #endif } static PyMethodDef Auth_methods[] = { { "ssl_is_https", (PyCFunction)Auth_ssl_is_https, METH_VARARGS, 0 }, { "ssl_var_lookup", (PyCFunction)Auth_ssl_var_lookup, METH_VARARGS, 0 }, { NULL, NULL} }; static PyTypeObject Auth_Type = { PyVarObject_HEAD_INIT(NULL, 0) "mod_wsgi.Auth", /*tp_name*/ sizeof(AuthObject), /*tp_basicsize*/ 0, /*tp_itemsize*/ /* methods */ (destructor)Auth_dealloc, /*tp_dealloc*/ 0, /*tp_print*/ 0, /*tp_getattr*/ 0, /*tp_setattr*/ 0, /*tp_compare*/ 0, /*tp_repr*/ 0, /*tp_as_number*/ 0, /*tp_as_sequence*/ 0, /*tp_as_mapping*/ 0, /*tp_hash*/ 0, /*tp_call*/ 0, /*tp_str*/ 0, /*tp_getattro*/ 0, /*tp_setattro*/ 0, /*tp_as_buffer*/ Py_TPFLAGS_DEFAULT, /*tp_flags*/ 0, /*tp_doc*/ 0, /*tp_traverse*/ 0, /*tp_clear*/ 0, /*tp_richcompare*/ 0, /*tp_weaklistoffset*/ 0, /*tp_iter*/ 0, /*tp_iternext*/ Auth_methods, /*tp_methods*/ 0, /*tp_members*/ 0, /*tp_getset*/ 0, /*tp_base*/ 0, /*tp_dict*/ 0, /*tp_descr_get*/ 0, /*tp_descr_set*/ 0, /*tp_dictoffset*/ 0, /*tp_init*/ 0, /*tp_alloc*/ 0, /*tp_new*/ 0, /*tp_free*/ 0, /*tp_is_gc*/ }; #if defined(MOD_WSGI_WITH_AUTHN_PROVIDER) static authn_status wsgi_check_password(request_rec *r, const char *user, const char *password) { WSGIRequestConfig *config; InterpreterObject *interp = NULL; PyObject *modules = NULL; PyObject *module = NULL; char *name = NULL; int exists = 0; const char *script; const char *group; authn_status status; config = wsgi_create_req_config(r->pool, r); if (!config->auth_user_script) { ap_log_error(APLOG_MARK, APLOG_ERR, 0, wsgi_server, "mod_wsgi (pid=%d): Location of WSGI user " "authentication script not provided.", getpid()); return AUTH_GENERAL_ERROR; } /* * Acquire the desired python interpreter. Once this is done * it is safe to start manipulating python objects. */ script = config->auth_user_script->handler_script; group = wsgi_server_group(r, config->auth_user_script->application_group); interp = wsgi_acquire_interpreter(group); if (!interp) { ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r, "mod_wsgi (pid=%d): Cannot acquire interpreter ‘%s’.", getpid(), group); return AUTH_GENERAL_ERROR; } /* Calculate the Python module name to be used for script. */ name = wsgi_module_name(r->pool, script); /* * Use a lock around the check to see if the module is * already loaded and the import of the module to prevent * two request handlers trying to import the module at the * same time. */ #if APR_HAS_THREADS if (config->script_reloading) { Py_BEGIN_ALLOW_THREADS apr_thread_mutex_lock(wsgi_module_lock); Py_END_ALLOW_THREADS } #endif modules = PyImport_GetModuleDict(); module = PyDict_GetItemString(modules, name); Py_XINCREF(module); if (module) exists = 1; /* * If script reloading is enabled and the module for it has * previously been loaded, see if it has been modified since * the last time it was accessed. */ if (module && config->script_reloading) { if (wsgi_reload_required(r->pool, r, script, module, NULL)) { /* * Script file has changed. Only support module * reloading for authentication scripts. Remove the * module from the modules dictionary before * reloading it again. If code is executing within * the module at the time, the callers reference * count on the module should ensure it isn’t * actually destroyed until it is finished. */ Py_DECREF(module); module = NULL; PyDict_DelItemString(modules, name); } } if (!module) { module = wsgi_load_source(r->pool, r, name, exists, script, "", group, 0); } /* Safe now to release the module lock. */ #if APR_HAS_THREADS if (config->script_reloading) apr_thread_mutex_unlock(wsgi_module_lock); #endif /* Log any details of exceptions if import failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); /* Assume an internal server error unless everything okay. */ status = AUTH_GENERAL_ERROR; /* Determine if script exists and execute it. */ if (module) { PyObject *module_dict = NULL; PyObject *object = NULL; module_dict = PyModule_GetDict(module); object = PyDict_GetItemString(module_dict, “check_password”); if (object) { PyObject *vars = NULL; PyObject *args = NULL; PyObject *result = NULL; PyObject *method = NULL; AuthObject *adapter = NULL; adapter = newAuthObject(r, config); if (adapter) { vars = Auth_environ(adapter, group); Py_INCREF(object); args = Py_BuildValue("(Oss)", vars, user, password); result = PyObject_CallObject(object, args); Py_DECREF(args); Py_DECREF(object); Py_DECREF(vars); if (result) { if (result == Py_None) { status = AUTH_USER_NOT_FOUND; } else if (result == Py_True) { status = AUTH_GRANTED; } else if (result == Py_False) { status = AUTH_DENIED; } #if PY_MAJOR_VERSION >= 3 else if (PyUnicode_Check(result)) { PyObject *str = NULL; str = PyUnicode_AsUTF8String(result); if (str) { adapter->r->user = apr_pstrdup(adapter->r->pool, PyString_AsString(str)); status = AUTH_GRANTED; } } #else else if (PyString_Check(result)) { adapter->r->user = apr_pstrdup(adapter->r->pool, PyString_AsString(result)); status = AUTH_GRANTED; } #endif else { PyErr_SetString(PyExc_TypeError, "Basic auth " "provider must return True, False " “None or user name as string”); } Py_DECREF(result); } /* * Wipe out references to Apache request object * held by Python objects, so can detect when an * application holds on to the transient Python * objects beyond the life of the request and * thus raise an exception if they are used. */ adapter->r = NULL; /* Log any details of exceptions if execution failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); /* Close the log object so data is flushed. */ method = PyObject_GetAttrString(adapter->log, “close”); if (!method) { PyErr_Format(PyExc_AttributeError, "’%s’ object has no attribute ‘close’", adapter->log->ob_type->tp_name); } else { result = PyObject_CallObject(method, NULL); Py_XDECREF(result); } /* Log any details of exceptions if execution failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); Py_XDECREF(method); /* No longer need adapter object. */ Py_DECREF((PyObject *)adapter); } } else { Py_BEGIN_ALLOW_THREADS ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): Target WSGI user " "authentication script ‘%s’ does not provide " "’Basic’ auth provider.", getpid(), script); Py_END_ALLOW_THREADS } } /* Cleanup and release interpreter, */ Py_XDECREF(module); wsgi_release_interpreter(interp); return status; } static authn_status wsgi_get_realm_hash(request_rec *r, const char *user, const char *realm, char **rethash) { WSGIRequestConfig *config; InterpreterObject *interp = NULL; PyObject *modules = NULL; PyObject *module = NULL; char *name = NULL; int exists = 0; const char *script; const char *group; authn_status status; config = wsgi_create_req_config(r->pool, r); if (!config->auth_user_script) { ap_log_error(APLOG_MARK, APLOG_ERR, 0, wsgi_server, "mod_wsgi (pid=%d): Location of WSGI user " "authentication script not provided.", getpid()); return AUTH_GENERAL_ERROR; } /* * Acquire the desired python interpreter. Once this is done * it is safe to start manipulating python objects. */ script = config->auth_user_script->handler_script; group = wsgi_server_group(r, config->auth_user_script->application_group); interp = wsgi_acquire_interpreter(group); if (!interp) { ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r, "mod_wsgi (pid=%d): Cannot acquire interpreter ‘%s’.", getpid(), group); return AUTH_GENERAL_ERROR; } /* Calculate the Python module name to be used for script. */ name = wsgi_module_name(r->pool, script); /* * Use a lock around the check to see if the module is * already loaded and the import of the module to prevent * two request handlers trying to import the module at the * same time. */ #if APR_HAS_THREADS Py_BEGIN_ALLOW_THREADS apr_thread_mutex_lock(wsgi_module_lock); Py_END_ALLOW_THREADS #endif modules = PyImport_GetModuleDict(); module = PyDict_GetItemString(modules, name); Py_XINCREF(module); if (module) exists = 1; /* * If script reloading is enabled and the module for it has * previously been loaded, see if it has been modified since * the last time it was accessed. */ if (module && config->script_reloading) { if (wsgi_reload_required(r->pool, r, script, module, NULL)) { /* * Script file has changed. Only support module * reloading for authentication scripts. Remove the * module from the modules dictionary before * reloading it again. If code is executing within * the module at the time, the callers reference * count on the module should ensure it isn’t * actually destroyed until it is finished. */ Py_DECREF(module); module = NULL; PyDict_DelItemString(modules, name); } } if (!module) { module = wsgi_load_source(r->pool, r, name, exists, script, "", group, 0); } /* Safe now to release the module lock. */ #if APR_HAS_THREADS apr_thread_mutex_unlock(wsgi_module_lock); #endif /* Log any details of exceptions if import failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); /* Assume an internal server error unless everything okay. */ status = AUTH_GENERAL_ERROR; /* Determine if script exists and execute it. */ if (module) { PyObject *module_dict = NULL; PyObject *object = NULL; module_dict = PyModule_GetDict(module); object = PyDict_GetItemString(module_dict, “get_realm_hash”); if (object) { PyObject *vars = NULL; PyObject *args = NULL; PyObject *result = NULL; PyObject *method = NULL; AuthObject *adapter = NULL; adapter = newAuthObject(r, config); if (adapter) { vars = Auth_environ(adapter, group); Py_INCREF(object); args = Py_BuildValue("(Oss)", vars, user, realm); result = PyObject_CallObject(object, args); Py_DECREF(args); Py_DECREF(object); Py_DECREF(vars); if (result) { if (result == Py_None) { status = AUTH_USER_NOT_FOUND; } else if (PyString_Check(result)) { *rethash = PyString_AsString(result); *rethash = apr_pstrdup(r->pool, *rethash); status = AUTH_USER_FOUND; } #if PY_MAJOR_VERSION >= 3 else if (PyUnicode_Check(result)) { PyObject *latin_item; latin_item = PyUnicode_AsLatin1String(result); if (!latin_item) { PyErr_SetString(PyExc_TypeError, "Digest auth " "provider must return None " "or string object, value " "containing non ‘latin-1’ " “characters found”); } else { Py_DECREF(result); result = latin_item; *rethash = PyString_AsString(result); *rethash = apr_pstrdup(r->pool, *rethash); status = AUTH_USER_FOUND; } } #endif else { PyErr_SetString(PyExc_TypeError, "Digest auth " "provider must return None " “or string object”); } Py_DECREF(result); } /* * Wipe out references to Apache request object * held by Python objects, so can detect when an * application holds on to the transient Python * objects beyond the life of the request and * thus raise an exception if they are used. */ adapter->r = NULL; /* Log any details of exceptions if execution failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); /* Close the log object so data is flushed. */ method = PyObject_GetAttrString(adapter->log, “close”); if (!method) { PyErr_Format(PyExc_AttributeError, "’%s’ object has no attribute ‘close’", adapter->log->ob_type->tp_name); } else { args = PyTuple_New(0); result = PyObject_CallObject(method, args); Py_XDECREF(result); Py_DECREF(args); } /* Log any details of exceptions if execution failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); Py_XDECREF(method); /* No longer need adapter object. */ Py_DECREF((PyObject *)adapter); } } else { Py_BEGIN_ALLOW_THREADS ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): Target WSGI user " "authentication script ‘%s’ does not provide " "’Digest’ auth provider.", getpid(), script); Py_END_ALLOW_THREADS } } /* Cleanup and release interpreter, */ Py_XDECREF(module); wsgi_release_interpreter(interp); return status; } static const authn_provider wsgi_authn_provider = { &wsgi_check_password, &wsgi_get_realm_hash }; #endif static int wsgi_groups_for_user(request_rec *r, WSGIRequestConfig *config, apr_table_t **grpstatus) { apr_table_t *grps = apr_table_make(r->pool, 15); InterpreterObject *interp = NULL; PyObject *modules = NULL; PyObject *module = NULL; char *name = NULL; int exists = 0; const char *script; const char *group; int status = HTTP_INTERNAL_SERVER_ERROR; if (!config->auth_group_script) { ap_log_error(APLOG_MARK, APLOG_ERR, 0, wsgi_server, "mod_wsgi (pid=%d): Location of WSGI group " "authentication script not provided.", getpid()); return HTTP_INTERNAL_SERVER_ERROR; } /* * Acquire the desired python interpreter. Once this is done * it is safe to start manipulating python objects. */ script = config->auth_group_script->handler_script; group = wsgi_server_group(r, config->auth_group_script->application_group); interp = wsgi_acquire_interpreter(group); if (!interp) { ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r, "mod_wsgi (pid=%d): Cannot acquire interpreter ‘%s’.", getpid(), group); return HTTP_INTERNAL_SERVER_ERROR; } /* Calculate the Python module name to be used for script. */ name = wsgi_module_name(r->pool, script); /* * Use a lock around the check to see if the module is * already loaded and the import of the module to prevent * two request handlers trying to import the module at the * same time. */ #if APR_HAS_THREADS Py_BEGIN_ALLOW_THREADS apr_thread_mutex_lock(wsgi_module_lock); Py_END_ALLOW_THREADS #endif modules = PyImport_GetModuleDict(); module = PyDict_GetItemString(modules, name); Py_XINCREF(module); if (module) exists = 1; /* * If script reloading is enabled and the module for it has * previously been loaded, see if it has been modified since * the last time it was accessed. */ if (module && config->script_reloading) { if (wsgi_reload_required(r->pool, r, script, module, NULL)) { /* * Script file has changed. Only support module * reloading for authentication scripts. Remove the * module from the modules dictionary before * reloading it again. If code is executing within * the module at the time, the callers reference * count on the module should ensure it isn’t * actually destroyed until it is finished. */ Py_DECREF(module); module = NULL; PyDict_DelItemString(modules, name); } } if (!module) { module = wsgi_load_source(r->pool, r, name, exists, script, "", group, 0); } /* Safe now to release the module lock. */ #if APR_HAS_THREADS apr_thread_mutex_unlock(wsgi_module_lock); #endif /* Log any details of exceptions if import failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); /* Assume an internal server error unless everything okay. */ status = HTTP_INTERNAL_SERVER_ERROR; /* Determine if script exists and execute it. */ if (module) { PyObject *module_dict = NULL; PyObject *object = NULL; module_dict = PyModule_GetDict(module); object = PyDict_GetItemString(module_dict, “groups_for_user”); if (object) { PyObject *vars = NULL; PyObject *args = NULL; PyObject *result = NULL; PyObject *method = NULL; AuthObject *adapter = NULL; adapter = newAuthObject(r, config); if (adapter) { vars = Auth_environ(adapter, group); Py_INCREF(object); args = Py_BuildValue("(Os)", vars, r->user); result = PyObject_CallObject(object, args); Py_DECREF(args); Py_DECREF(object); Py_DECREF(vars); if (result) { PyObject *iterator; iterator = PyObject_GetIter(result); if (iterator) { PyObject *item; const char *name; status = OK; while ((item = PyIter_Next(iterator))) { #if PY_MAJOR_VERSION >= 3 if (PyUnicode_Check(item)) { PyObject *latin_item; latin_item = PyUnicode_AsLatin1String(item); if (!latin_item) { Py_BEGIN_ALLOW_THREADS ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): " "Groups for user returned " "from ‘%s’ must be an " "iterable sequence of " "byte strings, value " "containing non ‘latin-1’ " "characters found", getpid(), script); Py_END_ALLOW_THREADS Py_DECREF(item); status = HTTP_INTERNAL_SERVER_ERROR; break; } else { Py_DECREF(item); item = latin_item; } } #endif if (!PyString_Check(item)) { Py_BEGIN_ALLOW_THREADS ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): Groups for " "user returned from ‘%s’ must " "be an iterable sequence of " "byte strings.", getpid(), script); Py_END_ALLOW_THREADS Py_DECREF(item); status = HTTP_INTERNAL_SERVER_ERROR; break; } name = PyString_AsString(item); apr_table_setn(grps, apr_pstrdup(r->pool, name), “1”); Py_DECREF(item); } Py_DECREF(iterator); } else { Py_BEGIN_ALLOW_THREADS ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): Groups for user " "returned from ‘%s’ must be an iterable " "sequence of byte strings.", getpid(), script); Py_END_ALLOW_THREADS } Py_DECREF(result); } /* * Wipe out references to Apache request object * held by Python objects, so can detect when an * application holds on to the transient Python * objects beyond the life of the request and * thus raise an exception if they are used. */ adapter->r = NULL; /* Log any details of exceptions if execution failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); /* Close the log object so data is flushed. */ method = PyObject_GetAttrString(adapter->log, “close”); if (!method) { PyErr_Format(PyExc_AttributeError, "’%s’ object has no attribute 'close’", adapter->log->ob_type->tp_name); } else { args = PyTuple_New(0); result = PyObject_CallObject(method, args); Py_XDECREF(result); Py_DECREF(args); } /* Log any details of exceptions if execution failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); Py_XDECREF(method); /* No longer need adapter object. */ Py_DECREF((PyObject *)adapter); } } else { Py_BEGIN_ALLOW_THREADS ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): Target WSGI group " "authentication script ‘%s’ does not provide " "group provider.", getpid(), script); Py_END_ALLOW_THREADS } } /* Cleanup and release interpreter, */ Py_XDECREF(module); wsgi_release_interpreter(interp); if (status == OK) *grpstatus = grps; return status; } static int wsgi_allow_access(request_rec *r, WSGIRequestConfig *config, const char *host) { InterpreterObject *interp = NULL; PyObject *modules = NULL; PyObject *module = NULL; char *name = NULL; int exists = 0; const char *script; const char *group; int allow = 0; if (!config->access_script) { ap_log_error(APLOG_MARK, APLOG_ERR, 0, wsgi_server, "mod_wsgi (pid=%d): Location of WSGI host " "access script not provided.", getpid()); return 0; } /* * Acquire the desired python interpreter. Once this is done * it is safe to start manipulating python objects. */ script = config->access_script->handler_script; group = wsgi_server_group(r, config->access_script->application_group); interp = wsgi_acquire_interpreter(group); if (!interp) { ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r, "mod_wsgi (pid=%d): Cannot acquire interpreter ‘%s’.", getpid(), group); return 0; } /* Calculate the Python module name to be used for script. */ name = wsgi_module_name(r->pool, script); /* * Use a lock around the check to see if the module is * already loaded and the import of the module to prevent * two request handlers trying to import the module at the * same time. */ #if APR_HAS_THREADS Py_BEGIN_ALLOW_THREADS apr_thread_mutex_lock(wsgi_module_lock); Py_END_ALLOW_THREADS #endif modules = PyImport_GetModuleDict(); module = PyDict_GetItemString(modules, name); Py_XINCREF(module); if (module) exists = 1; /* * If script reloading is enabled and the module for it has * previously been loaded, see if it has been modified since * the last time it was accessed. */ if (module && config->script_reloading) { if (wsgi_reload_required(r->pool, r, script, module, NULL)) { /* * Script file has changed. Only support module * reloading for authentication scripts. Remove the * module from the modules dictionary before * reloading it again. If code is executing within * the module at the time, the callers reference * count on the module should ensure it isn’t * actually destroyed until it is finished. */ Py_DECREF(module); module = NULL; PyDict_DelItemString(modules, name); } } if (!module) { module = wsgi_load_source(r->pool, r, name, exists, script, "", group, 0); } /* Safe now to release the module lock. */ #if APR_HAS_THREADS apr_thread_mutex_unlock(wsgi_module_lock); #endif /* Log any details of exceptions if import failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); /* Assume not allowed unless everything okay. */ allow = 0; /* Determine if script exists and execute it. */ if (module) { PyObject *module_dict = NULL; PyObject *object = NULL; module_dict = PyModule_GetDict(module); object = PyDict_GetItemString(module_dict, “allow_access”); if (object) { PyObject *vars = NULL; PyObject *args = NULL; PyObject *result = NULL; PyObject *method = NULL; AuthObject *adapter = NULL; adapter = newAuthObject(r, config); if (adapter) { vars = Auth_environ(adapter, group); Py_INCREF(object); args = Py_BuildValue("(Oz)", vars, host); result = PyObject_CallObject(object, args); Py_DECREF(args); Py_DECREF(object); Py_DECREF(vars); if (result) { if (result == Py_None) { allow = -1; } else if (PyBool_Check(result)) { if (result == Py_True) allow = 1; } else { Py_BEGIN_ALLOW_THREADS ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): Indicator of " "host accessibility returned from ‘%s’ " "must a boolean or None.", getpid(), script); Py_END_ALLOW_THREADS } Py_DECREF(result); } /* * Wipe out references to Apache request object * held by Python objects, so can detect when an * application holds on to the transient Python * objects beyond the life of the request and * thus raise an exception if they are used. */ adapter->r = NULL; /* Log any details of exceptions if execution failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); /* Close the log object so data is flushed. */ method = PyObject_GetAttrString(adapter->log, “close”); if (!method) { PyErr_Format(PyExc_AttributeError, "’%s’ object has no attribute 'close’", adapter->log->ob_type->tp_name); } else { args = PyTuple_New(0); result = PyObject_CallObject(method, args); Py_XDECREF(result); Py_DECREF(args); } /* Log any details of exceptions if execution failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); Py_XDECREF(method); /* No longer need adapter object. */ Py_DECREF((PyObject *)adapter); } } else { Py_BEGIN_ALLOW_THREADS ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): Target WSGI host " "access script ‘%s’ does not provide " "host validator.", getpid(), script); Py_END_ALLOW_THREADS } } /* Cleanup and release interpreter, */ Py_XDECREF(module); wsgi_release_interpreter(interp); return allow; } static int wsgi_hook_access_checker(request_rec *r) { WSGIRequestConfig *config; int allow = 0; const char *host = NULL; config = wsgi_create_req_config(r->pool, r); if (!config->access_script) return DECLINED; host = ap_get_remote_host(r->connection, r->per_dir_config, REMOTE_HOST, NULL); #if AP_MODULE_MAGIC_AT_LEAST(20111130,0) if (!host) host = r->useragent_ip; #else if (!host) host = r->connection->remote_ip; #endif allow = wsgi_allow_access(r, config, host); if (allow < 0) return DECLINED; else if (allow) return OK; if (ap_satisfies® != SATISFY_ANY || !ap_some_auth_required®) { ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): " "Client denied by server configuration: '%s’.", getpid(), r->filename); } return HTTP_FORBIDDEN; } #if !defined(MOD_WSGI_WITH_AUTHN_PROVIDER) static int wsgi_hook_check_user_id(request_rec *r) { WSGIRequestConfig *config; int status = -1; const char *password; InterpreterObject *interp = NULL; PyObject *modules = NULL; PyObject *module = NULL; char *name = NULL; int exists = 0; const char *script; const char *group; if ((status = ap_get_basic_auth_pw(r, &password))) return status; config = wsgi_create_req_config(r->pool, r); if (!config->auth_user_script) return DECLINED; /* * Acquire the desired python interpreter. Once this is done * it is safe to start manipulating python objects. */ script = config->auth_user_script->handler_script; group = wsgi_server_group(r, config->auth_user_script->application_group); interp = wsgi_acquire_interpreter(group); if (!interp) { ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r, "mod_wsgi (pid=%d): Cannot acquire interpreter '%s’.", getpid(), group); return HTTP_INTERNAL_SERVER_ERROR; } /* Calculate the Python module name to be used for script. */ name = wsgi_module_name(r->pool, script); /* * Use a lock around the check to see if the module is * already loaded and the import of the module to prevent * two request handlers trying to import the module at the * same time. */ #if APR_HAS_THREADS Py_BEGIN_ALLOW_THREADS apr_thread_mutex_lock(wsgi_module_lock); Py_END_ALLOW_THREADS #endif modules = PyImport_GetModuleDict(); module = PyDict_GetItemString(modules, name); Py_XINCREF(module); if (module) exists = 1; /* * If script reloading is enabled and the module for it has * previously been loaded, see if it has been modified since * the last time it was accessed. */ if (module && config->script_reloading) { if (wsgi_reload_required(r->pool, r, script, module, NULL)) { /* * Script file has changed. Only support module * reloading for authentication scripts. Remove the * module from the modules dictionary before * reloading it again. If code is executing within * the module at the time, the callers reference * count on the module should ensure it isn’t * actually destroyed until it is finished. */ Py_DECREF(module); module = NULL; PyDict_DelItemString(modules, name); } } if (!module) { module = wsgi_load_source(r->pool, r, name, exists, script, "", group, 0); } /* Safe now to release the module lock. */ #if APR_HAS_THREADS apr_thread_mutex_unlock(wsgi_module_lock); #endif /* Log any details of exceptions if import failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); /* Assume an internal server error unless everything okay. */ status = HTTP_INTERNAL_SERVER_ERROR; /* Determine if script exists and execute it. */ if (module) { PyObject *module_dict = NULL; PyObject *object = NULL; module_dict = PyModule_GetDict(module); object = PyDict_GetItemString(module_dict, “check_password”); if (object) { PyObject *vars = NULL; PyObject *args = NULL; PyObject *result = NULL; PyObject *method = NULL; AuthObject *adapter = NULL; adapter = newAuthObject(r, config); if (adapter) { vars = Auth_environ(adapter, group); Py_INCREF(object); args = Py_BuildValue("(Oss)", vars, r->user, password); result = PyObject_CallObject(object, args); Py_DECREF(args); Py_DECREF(object); Py_DECREF(vars); if (result) { if (result == Py_None) { if (config->user_authoritative) { ap_note_basic_auth_failure®; status = HTTP_UNAUTHORIZED; ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): User ‘%s’ not " "found in executing authentication " "script '%s’, for uri '%s’.", getpid(), r->user, script, r->uri); } else status = DECLINED; } else if (result == Py_True) { status = OK; } else if (result == Py_False) { ap_note_basic_auth_failure®; status = HTTP_UNAUTHORIZED; ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): Password mismatch " "for user ‘%s’ in executing " "authentication script ‘%s’, for uri " "’%s’.", getpid(), r->user, script, r->uri); } else { PyErr_SetString(PyExc_TypeError, "Basic auth " "provider must return True, False " “or None”); } Py_DECREF(result); } /* * Wipe out references to Apache request object * held by Python objects, so can detect when an * application holds on to the transient Python * objects beyond the life of the request and * thus raise an exception if they are used. */ adapter->r = NULL; /* Log any details of exceptions if execution failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); /* Close the log object so data is flushed. */ method = PyObject_GetAttrString(adapter->log, “close”); if (!method) { PyErr_Format(PyExc_AttributeError, "’%s’ object has no attribute ‘close’", adapter->log->ob_type->tp_name); } else { result = PyObject_CallObject(method, NULL); Py_XDECREF(result); } /* Log any details of exceptions if execution failed. */ if (PyErr_Occurred()) wsgi_log_python_error(r, NULL, script, 0); Py_XDECREF(method); /* No longer need adapter object. */ Py_DECREF((PyObject *)adapter); } } else { Py_BEGIN_ALLOW_THREADS ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): Target WSGI user " "authentication script ‘%s’ does not provide " "’Basic’ auth provider.", getpid(), script); Py_END_ALLOW_THREADS } } /* Cleanup and release interpreter, */ Py_XDECREF(module); wsgi_release_interpreter(interp); return status; } #endif #if defined(MOD_WSGI_WITH_AUTHZ_PROVIDER) #if MOD_WSGI_WITH_AUTHZ_PROVIDER_PARSED static authz_status wsgi_check_authorization(request_rec *r, const char *require_args, const void *parsed_require_line) #else static authz_status wsgi_check_authorization(request_rec *r, const char *require_args) #endif { WSGIRequestConfig *config; apr_table_t *grpstatus = NULL; const char *t, *w; int status; #if AP_MODULE_MAGIC_AT_LEAST(20100714,0) if (!r->user) return AUTHZ_DENIED_NO_USER; #endif config = wsgi_create_req_config(r->pool, r); if (!config->auth_group_script) { ap_log_error(APLOG_MARK, APLOG_ERR, 0, wsgi_server, "mod_wsgi (pid=%d): Location of WSGI group " "authorization script not provided.", getpid()); return AUTHZ_DENIED; } status = wsgi_groups_for_user(r, config, &grpstatus); if (status != OK) return AUTHZ_DENIED; if (apr_table_elts(grpstatus)->nelts == 0) { ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): " "Authorization of user ‘%s’ to access ‘%s’ failed. " "User is not a member of any groups.", getpid(), r->user, r->uri); return AUTHZ_DENIED; } t = require_args; while ((w = ap_getword_conf(r->pool, &t)) && w[0]) { if (apr_table_get(grpstatus, w)) { return AUTHZ_GRANTED; } } ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): " "Authorization of user ‘%s’ to access ‘%s’ failed. " "User is not a member of designated groups.", getpid(), r->user, r->uri); return AUTHZ_DENIED; } static const authz_provider wsgi_authz_provider = { &wsgi_check_authorization, #if MOD_WSGI_WITH_AUTHZ_PROVIDER_PARSED NULL, #endif }; #else static int wsgi_hook_auth_checker(request_rec *r) { WSGIRequestConfig *config; int m = r->method_number; const apr_array_header_t *reqs_arr; require_line *reqs; int required_group = 0; register int x; const char *t, *w; apr_table_t *grpstatus = NULL; char *reason = NULL; config = wsgi_create_req_config(r->pool, r); if (!config->auth_group_script) return DECLINED; reqs_arr = ap_requires®; if (!reqs_arr) return DECLINED; reqs = (require_line *)reqs_arr->elts; for (x = 0; x < reqs_arr->nelts; x++) { if (!(reqs[x].method_mask & (AP_METHOD_BIT << m))) { continue; } t = reqs[x].requirement; w = ap_getword_white(r->pool, &t); #if AP_MODULE_MAGIC_AT_LEAST(20100714,0) if (!strcasecmp(w, “wsgi-group”)) { #else if (!strcasecmp(w, “group”) || !strcasecmp(w, “wsgi-group”)) { #endif required_group = 1; if (!grpstatus) { int status; status = wsgi_groups_for_user(r, config, &grpstatus); if (status != OK) return status; if (apr_table_elts(grpstatus)->nelts == 0) { reason = "User is not a member of any groups"; break; } } while (t[0]) { w = ap_getword_conf(r->pool, &t); if (apr_table_get(grpstatus, w)) { return OK; } } } } if (!required_group || !config->group_authoritative) return DECLINED; ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "mod_wsgi (pid=%d): " "Authorization of user ‘%s’ to access ‘%s’ failed. %s.", getpid(), r->user, r->uri, reason ? reason : "User is not " “a member of designated groups”); ap_note_auth_failure®; return HTTP_UNAUTHORIZED; } #endif APR_OPTIONAL_FN_TYPE(ap_logio_add_bytes_out) *wsgi_logio_add_bytes_out; static void ap_logio_add_bytes_out(conn_rec *c, apr_off_t bytes) { if (!wsgi_daemon_pool && wsgi_logio_add_bytes_out) wsgi_logio_add_bytes_out(c, bytes); } static int wsgi_hook_logio(apr_pool_t *pconf, apr_pool_t *ptemp, apr_pool_t *plog, server_rec *s) { /* * This horrible fiddle is to insert a proxy function before * the normal ap_logio_add_bytes_out() function so that the * call to it can be disabled when mod_wsgi running in daemon * mode. If this is not done, then daemon process will crash * when mod_logio has been loaded. */ wsgi_logio_add_bytes_out = APR_RETRIEVE_OPTIONAL_FN(ap_logio_add_bytes_out); APR_REGISTER_OPTIONAL_FN(ap_logio_add_bytes_out); return OK; } static void wsgi_register_hooks(apr_pool_t *p) { static const char * const p1[] = { "mod_alias.c", NULL }; static const char * const n1[]= { "mod_userdir.c", "mod_vhost_alias.c", NULL }; static const char * const n2[] = { "core.c", NULL }; #if !defined(MOD_WSGI_WITH_AUTHN_PROVIDER) static const char * const p3[] = { "mod_auth.c", NULL }; #endif #if !defined(MOD_WSGI_WITH_AUTHZ_PROVIDER) static const char * const n4[] = { "mod_authz_user.c", NULL }; #endif static const char * const n5[] = { "mod_authz_host.c", NULL }; static const char * const p6[] = { "mod_python.c", NULL }; static const char * const p7[] = { "mod_ssl.c", NULL }; ap_hook_post_config(wsgi_hook_init, p6, NULL, APR_HOOK_MIDDLE); ap_hook_child_init(wsgi_hook_child_init, p6, NULL, APR_HOOK_MIDDLE); ap_hook_translate_name(wsgi_hook_intercept, p1, n1, APR_HOOK_MIDDLE); ap_hook_handler(wsgi_hook_handler, NULL, NULL, APR_HOOK_MIDDLE); #if defined(MOD_WSGI_WITH_DAEMONS) ap_hook_post_config(wsgi_hook_logio, NULL, n2, APR_HOOK_REALLY_FIRST); wsgi_header_filter_handle = ap_register_output_filter("WSGI_HEADER", wsgi_header_filter, NULL, AP_FTYPE_PROTOCOL); #endif #if !defined(MOD_WSGI_WITH_AUTHN_PROVIDER) ap_hook_check_user_id(wsgi_hook_check_user_id, p3, NULL, APR_HOOK_MIDDLE); #else ap_register_provider(p, AUTHN_PROVIDER_GROUP, "wsgi", AUTHN_PROVIDER_VERSION, &wsgi_authn_provider); #endif #if !defined(MOD_WSGI_WITH_AUTHZ_PROVIDER) ap_hook_auth_checker(wsgi_hook_auth_checker, NULL, n4, APR_HOOK_MIDDLE); #else ap_register_provider(p, AUTHZ_PROVIDER_GROUP, "wsgi-group", AUTHZ_PROVIDER_VERSION, &wsgi_authz_provider); #endif ap_hook_access_checker(wsgi_hook_access_checker, p7, n5, APR_HOOK_MIDDLE); } static const command_rec wsgi_commands[] = { AP_INIT_RAW_ARGS("WSGIScriptAlias", wsgi_add_script_alias, NULL, RSRC_CONF, “Map location to target WSGI script file.”), AP_INIT_RAW_ARGS("WSGIScriptAliasMatch", wsgi_add_script_alias, "*", RSRC_CONF, “Map location pattern to target WSGI script file.”), #if defined(MOD_WSGI_WITH_DAEMONS) AP_INIT_RAW_ARGS("WSGIDaemonProcess", wsgi_add_daemon_process, NULL, RSRC_CONF, “Specify details of daemon processes to start.”), AP_INIT_TAKE1("WSGISocketPrefix", wsgi_set_socket_prefix, NULL, RSRC_CONF, “Path prefix for the daemon process sockets.”), AP_INIT_TAKE1("WSGISocketRotation", wsgi_set_socket_rotation, NULL, RSRC_CONF, “Enable/Disable rotation of daemon process sockets.”), AP_INIT_TAKE1("WSGIAcceptMutex", wsgi_set_accept_mutex, NULL, RSRC_CONF, “Set accept mutex type for daemon processes.”), AP_INIT_TAKE1("WSGILazyInitialization", wsgi_set_lazy_initialization, NULL, RSRC_CONF, “Enable/Disable lazy Python initialization.”), #endif AP_INIT_TAKE1("WSGIVerboseDebugging", wsgi_set_verbose_debugging, NULL, RSRC_CONF, “Enable/Disable verbose debugging messages.”), #if PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION >= 6 AP_INIT_TAKE1("WSGIPy3kWarningFlag", wsgi_set_py3k_warning_flag, NULL, RSRC_CONF, “Enable/Disable Python 3.0 warnings.”), #endif #if (PY_MAJOR_VERSION == 3 && PY_MINOR_VERSION >= 3) || \ (PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION >= 6) AP_INIT_TAKE1("WSGIDontWriteBytecode", wsgi_set_dont_write_bytecode, NULL, RSRC_CONF, “Enable/Disable writing of byte code.”), #endif AP_INIT_TAKE1("WSGIPythonWarnings", wsgi_add_python_warnings, NULL, RSRC_CONF, “Control Python warning messages.”), AP_INIT_TAKE1("WSGIPythonOptimize", wsgi_set_python_optimize, NULL, RSRC_CONF, “Set level of Python compiler optimisations.”), AP_INIT_TAKE1("WSGIPythonHome", wsgi_set_python_home, NULL, RSRC_CONF, “Python prefix/exec_prefix absolute path names.”), AP_INIT_TAKE1("WSGIPythonPath", wsgi_set_python_path, NULL, RSRC_CONF, “Python module search path.”), AP_INIT_TAKE1("WSGIPythonEggs", wsgi_set_python_eggs, NULL, RSRC_CONF, “Python eggs cache directory.”), AP_INIT_TAKE1("WSGIPythonHashSeed", wsgi_set_python_hash_seed, NULL, RSRC_CONF, “Python hash seed.”), AP_INIT_TAKE1("WSGIDestroyInterpreter", wsgi_set_destroy_interpreter, NULL, RSRC_CONF, “Enable/Disable destruction of Python interpreter.”), #if defined(MOD_WSGI_WITH_DAEMONS) AP_INIT_TAKE1("WSGIRestrictEmbedded", wsgi_set_restrict_embedded, NULL, RSRC_CONF, “Enable/Disable use of embedded mode.”), #endif AP_INIT_TAKE1("WSGIRestrictStdin", wsgi_set_restrict_stdin, NULL, RSRC_CONF, “Enable/Disable restrictions on use of STDIN.”), AP_INIT_TAKE1("WSGIRestrictStdout", wsgi_set_restrict_stdout, NULL, RSRC_CONF, “Enable/Disable restrictions on use of STDOUT.”), AP_INIT_TAKE1("WSGIRestrictSignal", wsgi_set_restrict_signal, NULL, RSRC_CONF, “Enable/Disable restrictions on use of signal().”), AP_INIT_TAKE1("WSGICaseSensitivity", wsgi_set_case_sensitivity, NULL, RSRC_CONF, “Define whether file system is case sensitive.”), #if defined(MOD_WSGI_WITH_DAEMONS) AP_INIT_RAW_ARGS("WSGIRestrictProcess", wsgi_set_restrict_process, NULL, ACCESS_CONF|RSRC_CONF, “Limit selectable WSGI process groups.”), AP_INIT_TAKE1("WSGIProcessGroup", wsgi_set_process_group, NULL, ACCESS_CONF|RSRC_CONF, “Name of the WSGI process group.”), #endif AP_INIT_TAKE1("WSGIApplicationGroup", wsgi_set_application_group, NULL, ACCESS_CONF|RSRC_CONF, “Application interpreter group.”), AP_INIT_TAKE1("WSGICallableObject", wsgi_set_callable_object, NULL, OR_FILEINFO, “Name of entry point in WSGI script file.”), AP_INIT_RAW_ARGS("WSGIImportScript", wsgi_add_import_script, NULL, RSRC_CONF, “Location of WSGI import script.”), AP_INIT_RAW_ARGS("WSGIDispatchScript", wsgi_set_dispatch_script, NULL, ACCESS_CONF|RSRC_CONF, “Location of WSGI dispatch script.”), AP_INIT_TAKE1("WSGIPassApacheRequest", wsgi_set_pass_apache_request, NULL, ACCESS_CONF|RSRC_CONF, “Enable/Disable Apache request object.”), AP_INIT_TAKE1("WSGIPassAuthorization", wsgi_set_pass_authorization, NULL, OR_FILEINFO, “Enable/Disable WSGI authorization.”), AP_INIT_TAKE1("WSGIScriptReloading", wsgi_set_script_reloading, NULL, OR_FILEINFO, “Enable/Disable script reloading mechanism.”), AP_INIT_TAKE1("WSGIErrorOverride", wsgi_set_error_override, NULL, OR_FILEINFO, “Enable/Disable overriding of error pages.”), AP_INIT_TAKE1("WSGIChunkedRequest", wsgi_set_chunked_request, NULL, OR_FILEINFO, “Enable/Disable support for chunked requests.”), AP_INIT_TAKE1("WSGIMapHEADToGET", wsgi_set_map_head_to_get, NULL, OR_FILEINFO, “Enable/Disable mapping of HEAD to GET.”), AP_INIT_TAKE1("WSGIIgnoreActivity", wsgi_set_ignore_activity, NULL, OR_FILEINFO, “Enable/Disable reset of inactvity timeout.”), AP_INIT_RAW_ARGS("WSGITrustedProxyHeaders", wsgi_set_trusted_proxy_headers, NULL, OR_FILEINFO, “Specify a list of trusted proxy headers.”), AP_INIT_RAW_ARGS("WSGITrustedProxies", wsgi_set_trusted_proxies, NULL, OR_FILEINFO, “Specify a list of trusted proxies.”), #ifndef WIN32 AP_INIT_TAKE1("WSGIEnableSendfile", wsgi_set_enable_sendfile, NULL, OR_FILEINFO, “Enable/Disable support for kernel sendfile.”), #endif AP_INIT_RAW_ARGS("WSGIAccessScript", wsgi_set_access_script, NULL, OR_AUTHCFG, “Location of WSGI host access script file.”), AP_INIT_RAW_ARGS("WSGIAuthUserScript", wsgi_set_auth_user_script, NULL, OR_AUTHCFG, “Location of WSGI user auth script file.”), AP_INIT_RAW_ARGS("WSGIAuthGroupScript", wsgi_set_auth_group_script, NULL, OR_AUTHCFG, “Location of WSGI group auth script file.”), #if !defined(MOD_WSGI_WITH_AUTHN_PROVIDER) AP_INIT_TAKE1("WSGIUserAuthoritative", wsgi_set_user_authoritative, NULL, OR_AUTHCFG, “Enable/Disable as being authoritative on users.”), #endif AP_INIT_TAKE1("WSGIGroupAuthoritative", wsgi_set_group_authoritative, NULL, OR_AUTHCFG, “Enable/Disable as being authoritative on groups.”), AP_INIT_RAW_ARGS("WSGIHandlerScript", wsgi_add_handler_script, NULL, ACCESS_CONF|RSRC_CONF, “Location of WSGI handler script file.”), AP_INIT_TAKE1("WSGIServerMetrics", wsgi_set_server_metrics, NULL, RSRC_CONF, “Enabled/Disable access to server metrics.”), AP_INIT_TAKE1("WSGINewRelicConfigFile", wsgi_set_newrelic_config_file, NULL, RSRC_CONF, “New Relic monitoring agent configuration file.”), AP_INIT_TAKE1("WSGINewRelicEnvironment", wsgi_set_newrelic_environment, NULL, RSRC_CONF, “New Relic monitoring agent environment.”), { NULL } }; /* Dispatch list for API hooks */ module AP_MODULE_DECLARE_DATA wsgi_module = { STANDARD20_MODULE_STUFF, wsgi_create_dir_config, /* create per-dir config structures */ wsgi_merge_dir_config, /* merge per-dir config structures */ wsgi_create_server_config, /* create per-server config structures */ wsgi_merge_server_config, /* merge per-server config structures */ wsgi_commands, /* table of config file commands */ wsgi_register_hooks /* register hooks */ }; /* ------------------------------------------------------------------------- */ #if defined(_WIN32) #if PY_MAJOR_VERSION < 3 PyMODINIT_FUNC initmod_wsgi(void) { } #else PyMODINIT_FUNC PyInit_mod_wsgi(void) { return NULL; } #endif #endif /* ------------------------------------------------------------------------- */ /* vi: set sw=4 expandtab : */