CVE-2022-40897: setuptools/package_index.py at fe8a98e696241487ba6ac9f91faa38ade939ec5d · pypa/setuptools

“""PyPI and direct package downloading""” import sys import os import re import io import shutil import socket import base64 import hashlib import itertools import warnings import configparser import html import http.client import urllib.parse import urllib.request import urllib.error from functools import wraps import setuptools from pkg_resources import ( CHECKOUT_DIST, Distribution, BINARY_DIST, normalize_path, SOURCE_DIST, Environment, find_distributions, safe_name, safe_version, to_filename, Requirement, DEVELOP_DIST, EGG_DIST, parse_version, ) from distutils import log from distutils.errors import DistutilsError from fnmatch import translate from setuptools.wheel import Wheel from setuptools.extern.more_itertools import unique_everseen EGG_FRAGMENT = re.compile(r’^egg=([-A-Za-z0-9_.+!]+)$’) HREF = re.compile(r"""href\s*=\s*[‘"]?([^’"> ]+)“"", re.I) PYPI_MD5 = re.compile( r’<a href=”([^"#]+)“>([^<]+)</a>\n\s+\(<a (?:title="MD5 hash"\n\s+)' r’href=”[^?]+\?:action=show_md5&digest=([0-9a-f]{32})“>md5</a>\)' ) URL_SCHEME = re.compile('([-+.a-z0-9]{2,}):’, re.I).match EXTENSIONS = “.tar.gz .tar.bz2 .tar .zip .tgz".split() __all__ = [ 'PackageIndex’, 'distros_for_url’, 'parse_bdist_wininst’, 'interpret_distro_name’, ] _SOCKET_TIMEOUT = 15 _tmpl = “setuptools/{setuptools.__version__} Python-urllib/{py_major}” user_agent = _tmpl.format( py_major=’{}.{}’.format(*sys.version_info), setuptools=setuptools) def parse_requirement_arg(spec): try: return Requirement.parse(spec) except ValueError as e: raise DistutilsError( “Not a URL, existing file, or requirement spec: %r” % (spec,) ) from e def parse_bdist_wininst(name): “""Return (base,pyversion) or (None,None) for possible .exe name""” lower = name.lower() base, py_ver, plat = None, None, None if lower.endswith(‘.exe’): if lower.endswith(‘.win32.exe’): base = name[:-10] plat = ‘win32’ elif lower.startswith('.win32-py’, -16): py_ver = name[-7:-4] base = name[:-16] plat = ‘win32’ elif lower.endswith(‘.win-amd64.exe’): base = name[:-14] plat = ‘win-amd64’ elif lower.startswith('.win-amd64-py’, -20): py_ver = name[-7:-4] base = name[:-20] plat = ‘win-amd64’ return base, py_ver, plat def egg_info_for_url(url): parts = urllib.parse.urlparse(url) scheme, server, path, parameters, query, fragment = parts base = urllib.parse.unquote(path.split(‘/’)[-1]) if server == ‘sourceforge.net’ and base == 'download’: # XXX Yuck base = urllib.parse.unquote(path.split(‘/’)[-2]) if ‘#’ in base: base, fragment = base.split(‘#’, 1) return base, fragment def distros_for_url(url, metadata=None): “""Yield egg or source distribution objects that might be found at a URL""” base, fragment = egg_info_for_url(url) for dist in distros_for_location(url, base, metadata): yield dist if fragment: match = EGG_FRAGMENT.match(fragment) if match: for dist in interpret_distro_name( url, match.group(1), metadata, precedence=CHECKOUT_DIST ): yield dist def distros_for_location(location, basename, metadata=None): “""Yield egg or source distribution objects based on basename""” if basename.endswith(‘.egg.zip’): basename = basename[:-4] # strip the .zip if basename.endswith(‘.egg’) and '-' in basename: # only one, unambiguous interpretation return [Distribution.from_location(location, basename, metadata)] if basename.endswith(‘.whl’) and '-' in basename: wheel = Wheel(basename) if not wheel.is_compatible(): return [] return [Distribution( location=location, project_name=wheel.project_name, version=wheel.version, # Increase priority over eggs. precedence=EGG_DIST + 1, )] if basename.endswith(‘.exe’): win_base, py_ver, platform = parse_bdist_wininst(basename) if win_base is not None: return interpret_distro_name( location, win_base, metadata, py_ver, BINARY_DIST, platform ) # Try source distro extensions (.zip, .tgz, etc.) # for ext in EXTENSIONS: if basename.endswith(ext): basename = basename[:-len(ext)] return interpret_distro_name(location, basename, metadata) return [] # no extension matched def distros_for_filename(filename, metadata=None): “""Yield possible egg or source distribution objects based on a filename""” return distros_for_location( normalize_path(filename), os.path.basename(filename), metadata ) def interpret_distro_name( location, basename, metadata, py_version=None, precedence=SOURCE_DIST, platform=None ): """Generate alternative interpretations of a source distro name Note: if `location` is a filesystem filename, you should call ``pkg_resources.normalize_path()`` on it before passing it to this routine! “"” # Generate alternative interpretations of a source distro name # Because some packages are ambiguous as to name/versions split # e.g. "adns-python-1.1.0", "egenix-mx-commercial", etc. # So, we generate each possible interpretation (e.g. “adns, python-1.1.0” # “adns-python, 1.1.0", and “adns-python-1.1.0, no version”). In practice, # the spurious interpretations should be ignored, because in the event # there’s also an “adns” package, the spurious “python-1.1.0” version will # compare lower than any numeric version number, and is therefore unlikely # to match a request for it. It’s still a potential problem, though, and # in the long run PyPI and the distutils should go for “safe” names and # versions in distribution archive names (sdist and bdist). parts = basename.split('-') if not py_version and any(re.match(r’py\d\.\d$’, p) for p in parts[2:]): # it is a bdist_dumb, not an sdist – bail out return for p in range(1, len(parts) + 1): yield Distribution( location, metadata, '-'.join(parts[:p]), '-'.join(parts[p:]), py_version=py_version, precedence=precedence, platform=platform ) def unique_values(func): “"” Wrap a function returning an iterable such that the resulting iterable only ever yields unique items. “"” @wraps(func) def wrapper(*args, **kwargs): return unique_everseen(func(*args, **kwargs)) return wrapper REL = re.compile(r"""<([^>]*\srel\s*=\s*['”]?([^’">]+)[^>]*)>""", re.I) # this line is here to fix emacs’ cruddy broken syntax highlighting @unique_values def find_external_links(url, page): “""Find rel="homepage” and rel="download” links in `page`, yielding URLs""” for match in REL.finditer(page): tag, rel = match.groups() rels = set(map(str.strip, rel.lower().split(‘,’))) if ‘homepage’ in rels or ‘download’ in rels: for match in HREF.finditer(tag): yield urllib.parse.urljoin(url, htmldecode(match.group(1))) for tag in ("<th>Home Page", “<th>Download URL”): pos = page.find(tag) if pos != -1: match = HREF.search(page, pos) if match: yield urllib.parse.urljoin(url, htmldecode(match.group(1))) class ContentChecker: “"” A null content checker that defines the interface for checking content “"” def feed(self, block): “"” Feed a block of data to the hash. “"” return def is_valid(self): “"” Check the hash. Return False if validation fails. “"” return True def report(self, reporter, template): “"” Call reporter with information about the checker (hash name) substituted into the template. “"” return class HashChecker(ContentChecker): pattern = re.compile( r’(?P<hash_name>sha1|sha224|sha384|sha256|sha512|md5)=’ r’(?P<expected>[a-f0-9]+)' ) def __init__(self, hash_name, expected): self.hash_name = hash_name self.hash = hashlib.new(hash_name) self.expected = expected @classmethod def from_url(cls, url): “Construct a (possibly null) ContentChecker from a URL” fragment = urllib.parse.urlparse(url)[-1] if not fragment: return ContentChecker() match = cls.pattern.search(fragment) if not match: return ContentChecker() return cls(**match.groupdict()) def feed(self, block): self.hash.update(block) def is_valid(self): return self.hash.hexdigest() == self.expected def report(self, reporter, template): msg = template % self.hash_name return reporter(msg) class PackageIndex(Environment): “""A distribution index that scans web pages for download URLs""” def __init__( self, index_url="https://pypi.org/simple/", hosts=('*’,), ca_bundle=None, verify_ssl=True, *args, **kw ): super().__init__(*args, **kw) self.index_url = index_url + “/” [:not index_url.endswith(‘/’)] self.scanned_urls = {} self.fetched_urls = {} self.package_pages = {} self.allows = re.compile('|’.join(map(translate, hosts))).match self.to_scan = [] self.opener = urllib.request.urlopen def add(self, dist): # ignore invalid versions try: parse_version(dist.version) except Exception: return return super().add(dist) # FIXME: ‘PackageIndex.process_url’ is too complex (14) def process_url(self, url, retrieve=False): # noqa: C901 “""Evaluate a URL as a possible download, and maybe retrieve it""” if url in self.scanned_urls and not retrieve: return self.scanned_urls[url] = True if not URL_SCHEME(url): self.process_filename(url) return else: dists = list(distros_for_url(url)) if dists: if not self.url_ok(url): return self.debug("Found link: %s", url) if dists or not retrieve or url in self.fetched_urls: list(map(self.add, dists)) return # don’t need the actual page if not self.url_ok(url): self.fetched_urls[url] = True return self.info("Reading %s", url) self.fetched_urls[url] = True # prevent multiple fetch attempts tmpl = “Download error on %s: %%s – Some packages may not be found!” f = self.open_url(url, tmpl % url) if f is None: return if isinstance(f, urllib.error.HTTPError) and f.code == 401: self.info(“Authentication error: %s” % f.msg) self.fetched_urls[f.url] = True if ‘html’ not in f.headers.get('content-type’, ‘’).lower(): f.close() # not html, we can’t process it return base = f.url # handle redirects page = f.read() if not isinstance(page, str): # In Python 3 and got bytes but want str. if isinstance(f, urllib.error.HTTPError): # Errors have no charset, assume latin1: charset = ‘latin-1’ else: charset = f.headers.get_param(‘charset’) or ‘latin-1’ page = page.decode(charset, “ignore”) f.close() for match in HREF.finditer(page): link = urllib.parse.urljoin(base, htmldecode(match.group(1))) self.process_url(link) if url.startswith(self.index_url) and getattr(f, 'code’, None) != 404: page = self.process_index(url, page) def process_filename(self, fn, nested=False): # process filenames or directories if not os.path.exists(fn): self.warn("Not found: %s", fn) return if os.path.isdir(fn) and not nested: path = os.path.realpath(fn) for item in os.listdir(path): self.process_filename(os.path.join(path, item), True) dists = distros_for_filename(fn) if dists: self.debug("Found: %s", fn) list(map(self.add, dists)) def url_ok(self, url, fatal=False): s = URL_SCHEME(url) is_file = s and s.group(1).lower() == ‘file’ if is_file or self.allows(urllib.parse.urlparse(url)[1]): return True msg = ( "\nNote: Bypassing %s (disallowed host; see " “http://bit.ly/2hrImnY for details).\n”) if fatal: raise DistutilsError(msg % url) else: self.warn(msg, url) def scan_egg_links(self, search_path): dirs = filter(os.path.isdir, search_path) egg_links = ( (path, entry) for path in dirs for entry in os.listdir(path) if entry.endswith(‘.egg-link’) ) list(itertools.starmap(self.scan_egg_link, egg_links)) def scan_egg_link(self, path, entry): with open(os.path.join(path, entry)) as raw_lines: # filter non-empty lines lines = list(filter(None, map(str.strip, raw_lines))) if len(lines) != 2: # format is not recognized; punt return egg_path, setup_path = lines for dist in find_distributions(os.path.join(path, egg_path)): dist.location = os.path.join(path, *lines) dist.precedence = SOURCE_DIST self.add(dist) def _scan(self, link): # Process a URL to see if it’s for a package page NO_MATCH_SENTINEL = None, None if not link.startswith(self.index_url): return NO_MATCH_SENTINEL parts = list(map( urllib.parse.unquote, link[len(self.index_url):].split(‘/’) )) if len(parts) != 2 or ‘#’ in parts[1]: return NO_MATCH_SENTINEL # it’s a package page, sanitize and index it pkg = safe_name(parts[0]) ver = safe_version(parts[1]) self.package_pages.setdefault(pkg.lower(), {})[link] = True return to_filename(pkg), to_filename(ver) def process_index(self, url, page): “""Process the contents of a PyPI page""” # process an index page into the package-page index for match in HREF.finditer(page): try: self._scan(urllib.parse.urljoin(url, htmldecode(match.group(1)))) except ValueError: pass pkg, ver = self._scan(url) # ensure this page is in the page index if not pkg: return “” # no sense double-scanning non-package pages # process individual package page for new_url in find_external_links(url, page): # Process the found URL base, frag = egg_info_for_url(new_url) if base.endswith(‘.py’) and not frag: if ver: new_url += ‘#egg=%s-%s’ % (pkg, ver) else: self.need_version_info(url) self.scan_url(new_url) return PYPI_MD5.sub( lambda m: ‘<a href="%s#md5=%s">%s</a>’ % m.group(1, 3, 2), page ) def need_version_info(self, url): self.scan_all( "Page at %s links to .py file(s) without version info; an index " "scan is required.", url ) def scan_all(self, msg=None, *args): if self.index_url not in self.fetched_urls: if msg: self.warn(msg, *args) self.info( "Scanning index of all packages (this may take a while)" ) self.scan_url(self.index_url) def find_packages(self, requirement): self.scan_url(self.index_url + requirement.unsafe_name + ‘/’) if not self.package_pages.get(requirement.key): # Fall back to safe version of the name self.scan_url(self.index_url + requirement.project_name + ‘/’) if not self.package_pages.get(requirement.key): # We couldn’t find the target package, so search the index page too self.not_found_in_index(requirement) for url in list(self.package_pages.get(requirement.key, ())): # scan each page that might be related to the desired package self.scan_url(url) def obtain(self, requirement, installer=None): self.prescan() self.find_packages(requirement) for dist in self[requirement.key]: if dist in requirement: return dist self.debug("%s does not match %s", requirement, dist) return super(PackageIndex, self).obtain(requirement, installer) def check_hash(self, checker, filename, tfp): “"” checker is a ContentChecker “"” checker.report( self.debug, “Validating %%s checksum for %s” % filename) if not checker.is_valid(): tfp.close() os.unlink(filename) raise DistutilsError( "%s validation failed for %s; " “possible download problem?” % (checker.hash.name, os.path.basename(filename)) ) def add_find_links(self, urls): “""Add `urls` to the list that will be prescanned for searches""” for url in urls: if ( self.to_scan is None # if we have already “gone online” or not URL_SCHEME(url) # or it’s a local file/directory or url.startswith(‘file:’) or list(distros_for_url(url)) # or a direct package link ): # then go ahead and process it now self.scan_url(url) else: # otherwise, defer retrieval till later self.to_scan.append(url) def prescan(self): """Scan urls scheduled for prescanning (e.g. --find-links)“"” if self.to_scan: list(map(self.scan_url, self.to_scan)) self.to_scan = None # from now on, go ahead and process immediately def not_found_in_index(self, requirement): if self[requirement.key]: # we’ve seen at least one distro meth, msg = self.info, “Couldn’t retrieve index page for %r” else: # no distros seen for this name, might be misspelled meth, msg = ( self.warn, "Couldn’t find index page for %r (maybe misspelled?)") meth(msg, requirement.unsafe_name) self.scan_all() def download(self, spec, tmpdir): """Locate and/or download `spec` to `tmpdir`, returning a local path `spec` may be a ``Requirement`` object, or a string containing a URL, an existing local filename, or a project/version requirement spec (i.e. the string form of a ``Requirement`` object). If it is the URL of a .py file with an unambiguous ``#egg=name-version`` tag (i.e., one that escapes ``-`` as ``_`` throughout), a trivial ``setup.py`` is automatically created alongside the downloaded file. If `spec` is a ``Requirement`` object or a string containing a project/version requirement spec, this method returns the location of a matching distribution (possibly after downloading it to `tmpdir`). If `spec` is a locally existing file or directory name, it is simply returned unchanged. If `spec` is a URL, it is downloaded to a subpath of `tmpdir`, and the local filename is returned. Various errors may be raised if a problem occurs during downloading. “"” if not isinstance(spec, Requirement): scheme = URL_SCHEME(spec) if scheme: # It’s a url, download it to tmpdir found = self._download_url(scheme.group(1), spec, tmpdir) base, fragment = egg_info_for_url(spec) if base.endswith(‘.py’): found = self.gen_setup(found, fragment, tmpdir) return found elif os.path.exists(spec): # Existing file or directory, just return it return spec else: spec = parse_requirement_arg(spec) return getattr(self.fetch_distribution(spec, tmpdir), 'location’, None) def fetch_distribution( # noqa: C901 # is too complex (14) # FIXME self, requirement, tmpdir, force_scan=False, source=False, develop_ok=False, local_index=None): """Obtain a distribution suitable for fulfilling `requirement` `requirement` must be a ``pkg_resources.Requirement`` instance. If necessary, or if the `force_scan` flag is set, the requirement is searched for in the (online) package index as well as the locally installed packages. If a distribution matching `requirement` is found, the returned distribution’s ``location`` is the value you would have gotten from calling the ``download()`` method with the matching distribution’s URL or filename. If no matching distribution is found, ``None`` is returned. If the `source` flag is set, only source distributions and source checkout links will be considered. Unless the `develop_ok` flag is set, development and system eggs (i.e., those using the ``.egg-info`` format) will be ignored. “"” # process a Requirement self.info("Searching for %s", requirement) skipped = {} dist = None def find(req, env=None): if env is None: env = self # Find a matching distribution; may be called more than once for dist in env[req.key]: if dist.precedence == DEVELOP_DIST and not develop_ok: if dist not in skipped: self.warn( "Skipping development or system egg: %s", dist, ) skipped[dist] = 1 continue test = ( dist in req and (dist.precedence <= SOURCE_DIST or not source) ) if test: loc = self.download(dist.location, tmpdir) dist.download_location = loc if os.path.exists(dist.download_location): return dist if force_scan: self.prescan() self.find_packages(requirement) dist = find(requirement) if not dist and local_index is not None: dist = find(requirement, local_index) if dist is None: if self.to_scan is not None: self.prescan() dist = find(requirement) if dist is None and not force_scan: self.find_packages(requirement) dist = find(requirement) if dist is None: self.warn( "No local packages or working download links found for %s%s", (source and "a source distribution of " or “”), requirement, ) else: self.info("Best match: %s", dist) return dist.clone(location=dist.download_location) def fetch(self, requirement, tmpdir, force_scan=False, source=False): """Obtain a file suitable for fulfilling `requirement` DEPRECATED; use the ``fetch_distribution()`` method now instead. For backward compatibility, this routine is identical but returns the ``location`` of the downloaded distribution instead of a distribution object. “"” dist = self.fetch_distribution(requirement, tmpdir, force_scan, source) if dist is not None: return dist.location return None def gen_setup(self, filename, fragment, tmpdir): match = EGG_FRAGMENT.match(fragment) dists = match and [ d for d in interpret_distro_name(filename, match.group(1), None) if d.version ] or [] if len(dists) == 1: # unambiguous ``#egg`` fragment basename = os.path.basename(filename) # Make sure the file has been downloaded to the temp dir. if os.path.dirname(filename) != tmpdir: dst = os.path.join(tmpdir, basename) if not (os.path.exists(dst) and os.path.samefile(filename, dst)): shutil.copy2(filename, dst) filename = dst with open(os.path.join(tmpdir, ‘setup.py’), ‘w’) as file: file.write( “from setuptools import setup\n” “setup(name=%r, version=%r, py_modules=[%r])\n” % ( dists[0].project_name, dists[0].version, os.path.splitext(basename)[0] ) ) return filename elif match: raise DistutilsError( "Can’t unambiguously interpret project/version identifier %r; " “any dashes in the name or version should be escaped using " “underscores. %r” % (fragment, dists) ) else: raise DistutilsError( “Can’t process plain .py files without an '#egg=name-version’” " suffix to enable automatic setup script generation.” ) dl_blocksize = 8192 def _download_to(self, url, filename): self.info("Downloading %s", url) # Download the file fp = None try: checker = HashChecker.from_url(url) fp = self.open_url(url) if isinstance(fp, urllib.error.HTTPError): raise DistutilsError( “Can’t download %s: %s %s” % (url, fp.code, fp.msg) ) headers = fp.info() blocknum = 0 bs = self.dl_blocksize size = -1 if “content-length” in headers: # Some servers return multiple Content-Length headers :( sizes = headers.get_all(‘Content-Length’) size = max(map(int, sizes)) self.reporthook(url, filename, blocknum, bs, size) with open(filename, ‘wb’) as tfp: while True: block = fp.read(bs) if block: checker.feed(block) tfp.write(block) blocknum += 1 self.reporthook(url, filename, blocknum, bs, size) else: break self.check_hash(checker, filename, tfp) return headers finally: if fp: fp.close() def reporthook(self, url, filename, blocknum, blksize, size): pass # no-op # FIXME: def open_url(self, url, warning=None): # noqa: C901 # is too complex (12) if url.startswith(‘file:’): return local_open(url) try: return open_with_auth(url, self.opener) except (ValueError, http.client.InvalidURL) as v: msg = ' '.join([str(arg) for arg in v.args]) if warning: self.warn(warning, msg) else: raise DistutilsError(‘%s %s’ % (url, msg)) from v except urllib.error.HTTPError as v: return v except urllib.error.URLError as v: if warning: self.warn(warning, v.reason) else: raise DistutilsError(“Download error for %s: %s” % (url, v.reason)) from v except http.client.BadStatusLine as v: if warning: self.warn(warning, v.line) else: raise DistutilsError( '%s returned a bad status line. The server might be ' ‘down, %s’ % (url, v.line) ) from v except (http.client.HTTPException, socket.error) as v: if warning: self.warn(warning, v) else: raise DistutilsError(“Download error for %s: %s” % (url, v)) from v def _download_url(self, scheme, url, tmpdir): # Determine download filename # name, fragment = egg_info_for_url(url) if name: while ‘…’ in name: name = name.replace('…’, ‘.’).replace('\\’, ‘_’) else: name = “__downloaded__” # default if URL has no path contents if name.endswith(‘.egg.zip’): name = name[:-4] # strip the extra .zip before download filename = os.path.join(tmpdir, name) # Download the file # if scheme == ‘svn’ or scheme.startswith(‘svn+’): return self._download_svn(url, filename) elif scheme == ‘git’ or scheme.startswith(‘git+’): return self._download_git(url, filename) elif scheme.startswith(‘hg+’): return self._download_hg(url, filename) elif scheme == 'file’: return urllib.request.url2pathname(urllib.parse.urlparse(url)[2]) else: self.url_ok(url, True) # raises error if not allowed return self._attempt_download(url, filename) def scan_url(self, url): self.process_url(url, True) def _attempt_download(self, url, filename): headers = self._download_to(url, filename) if ‘html’ in headers.get('content-type’, ‘’).lower(): return self._download_html(url, headers, filename) else: return filename def _download_html(self, url, headers, filename): file = open(filename) for line in file: if line.strip(): # Check for a subversion index page if re.search(r’<title>([^- ]+ - )?Revision \d+:’, line): # it’s a subversion index page: file.close() os.unlink(filename) return self._download_svn(url, filename) break # not an index page file.close() os.unlink(filename) raise DistutilsError(“Unexpected HTML page found at " + url) def _download_svn(self, url, filename): warnings.warn(“SVN download support is deprecated", UserWarning) url = url.split('#’, 1)[0] # remove any fragment for svn’s sake creds = ‘’ if url.lower().startswith(‘svn:’) and ‘@’ in url: scheme, netloc, path, p, q, f = urllib.parse.urlparse(url) if not netloc and path.startswith(‘//’) and ‘/’ in path[2:]: netloc, path = path[2:].split('/’, 1) auth, host = _splituser(netloc) if auth: if ‘:’ in auth: user, pw = auth.split(':’, 1) creds = " --username=%s --password=%s” % (user, pw) else: creds = " --username=” + auth netloc = host parts = scheme, netloc, url, p, q, f url = urllib.parse.urlunparse(parts) self.info("Doing subversion checkout from %s to %s", url, filename) os.system(“svn checkout%s -q %s %s” % (creds, url, filename)) return filename @staticmethod def _vcs_split_rev_from_url(url, pop_prefix=False): scheme, netloc, path, query, frag = urllib.parse.urlsplit(url) scheme = scheme.split('+’, 1)[-1] # Some fragment identification fails path = path.split('#’, 1)[0] rev = None if ‘@’ in path: path, rev = path.rsplit('@’, 1) # Also, discard fragment url = urllib.parse.urlunsplit((scheme, netloc, path, query, ‘’)) return url, rev def _download_git(self, url, filename): filename = filename.split('#’, 1)[0] url, rev = self._vcs_split_rev_from_url(url, pop_prefix=True) self.info("Doing git clone from %s to %s", url, filename) os.system(“git clone --quiet %s %s” % (url, filename)) if rev is not None: self.info("Checking out %s", rev) os.system(“git -C %s checkout --quiet %s” % ( filename, rev, )) return filename def _download_hg(self, url, filename): filename = filename.split(‘#’, 1)[0] url, rev = self._vcs_split_rev_from_url(url, pop_prefix=True) self.info("Doing hg clone from %s to %s", url, filename) os.system(“hg clone --quiet %s %s” % (url, filename)) if rev is not None: self.info("Updating to %s", rev) os.system(“hg --cwd %s up -C -r %s -q” % ( filename, rev, )) return filename def debug(self, msg, *args): log.debug(msg, *args) def info(self, msg, *args): log.info(msg, *args) def warn(self, msg, *args): log.warn(msg, *args) # This pattern matches a character entity reference (a decimal numeric # references, a hexadecimal numeric reference, or a named reference). entity_sub = re.compile(r’&(#(\d+|x[\da-fA-F]+)|[\w.:-]+);?’).sub def decode_entity(match): what = match.group(0) return html.unescape(what) def htmldecode(text): “"” Decode HTML entities in the given text. >>> htmldecode( … ‘https://…/package_name-0.1.2.tar.gz’ … ‘?tokena=A&tokenb=B">package_name-0.1.2.tar.gz’) ‘https://…/package_name-0.1.2.tar.gz?tokena=A&tokenb=B">package_name-0.1.2.tar.gz’ “"” return entity_sub(decode_entity, text) def socket_timeout(timeout=15): def _socket_timeout(func): def _socket_timeout(*args, **kwargs): old_timeout = socket.getdefaulttimeout() socket.setdefaulttimeout(timeout) try: return func(*args, **kwargs) finally: socket.setdefaulttimeout(old_timeout) return _socket_timeout return _socket_timeout def _encode_auth(auth): “"” Encode auth from a URL suitable for an HTTP header. >>> str(_encode_auth(‘username%3Apassword’)) ‘dXNlcm5hbWU6cGFzc3dvcmQ=’ Long auth strings should not cause a newline to be inserted. >>> long_auth = ‘username:’ + 'password’*10 >>> chr(10) in str(_encode_auth(long_auth)) False “"” auth_s = urllib.parse.unquote(auth) # convert to bytes auth_bytes = auth_s.encode() encoded_bytes = base64.b64encode(auth_bytes) # convert back to a string encoded = encoded_bytes.decode() # strip the trailing carriage return return encoded.replace('\n’, ‘’) class Credential: “"” A username/password pair. Use like a namedtuple. “"” def __init__(self, username, password): self.username = username self.password = password def __iter__(self): yield self.username yield self.password def __str__(self): return ‘%(username)s:%(password)s’ % vars(self) class PyPIConfig(configparser.RawConfigParser): def __init__(self): “"” Load from ~/.pypirc “"” defaults = dict.fromkeys(['username’, 'password’, ‘repository’], ‘’) super().__init__(defaults) rc = os.path.join(os.path.expanduser(‘~’), ‘.pypirc’) if os.path.exists(rc): self.read(rc) @property def creds_by_repository(self): sections_with_repositories = [ section for section in self.sections() if self.get(section, ‘repository’).strip() ] return dict(map(self._get_repo_cred, sections_with_repositories)) def _get_repo_cred(self, section): repo = self.get(section, ‘repository’).strip() return repo, Credential( self.get(section, ‘username’).strip(), self.get(section, ‘password’).strip(), ) def find_credential(self, url): “"” If the URL indicated appears to be a repository defined in this config, return the credential for that repository. “"” for repository, cred in self.creds_by_repository.items(): if url.startswith(repository): return cred def open_with_auth(url, opener=urllib.request.urlopen): “""Open a urllib2 request, handling HTTP authentication""” parsed = urllib.parse.urlparse(url) scheme, netloc, path, params, query, frag = parsed # Double scheme does not raise on macOS as revealed by a # failing test. We would expect "nonnumeric port". Refs #20. if netloc.endswith(‘:’): raise http.client.InvalidURL(“nonnumeric port: '’”) if scheme in ('http’, ‘https’): auth, address = _splituser(netloc) else: auth = None if not auth: cred = PyPIConfig().find_credential(url) if cred: auth = str(cred) info = cred.username, url log.info('Authenticating as %s for %s (from .pypirc)', *info) if auth: auth = "Basic " + _encode_auth(auth) parts = scheme, address, path, params, query, frag new_url = urllib.parse.urlunparse(parts) request = urllib.request.Request(new_url) request.add_header("Authorization", auth) else: request = urllib.request.Request(url) request.add_header('User-Agent’, user_agent) fp = opener(request) if auth: # Put authentication info back into request URL if same host, # so that links found on the page will work s2, h2, path2, param2, query2, frag2 = urllib.parse.urlparse(fp.url) if s2 == scheme and h2 == address: parts = s2, netloc, path2, param2, query2, frag2 fp.url = urllib.parse.urlunparse(parts) return fp # copy of urllib.parse._splituser from Python 3.8 def _splituser(host): “""splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'.""” user, delim, host = host.rpartition(‘@’) return (user if delim else None), host # adding a timeout to avoid freezing package_index open_with_auth = socket_timeout(_SOCKET_TIMEOUT)(open_with_auth) def fix_sf_url(url): return url # backward compatibility def local_open(url): “""Read a local path, with special support for directories""” scheme, server, path, param, query, frag = urllib.parse.urlparse(url) filename = urllib.request.url2pathname(path) if os.path.isfile(filename): return urllib.request.urlopen(url) elif path.endswith(‘/’) and os.path.isdir(filename): files = [] for f in os.listdir(filename): filepath = os.path.join(filename, f) if f == 'index.html’: with open(filepath, ‘r’) as fp: body = fp.read() break elif os.path.isdir(filepath): f += ‘/’ files.append('<a href="{name}">{name}</a>’.format(name=f)) else: tmpl = ( “<html><head><title>{url}</title>” “</head><body>{files}</body></html>”) body = tmpl.format(url=url, files=’\n’.join(files)) status, message = 200, “OK” else: status, message, body = 404, "Path not found", “Not found” headers = {’content-type’: 'text/html’} body_stream = io.StringIO(body) return urllib.error.HTTPError(url, status, message, headers, body_stream)