mirror of
https://github.com/Sneed-Group/Poodletooth-iLand
synced 2024-12-27 05:32:41 -06:00
1202 lines
43 KiB
Python
Executable file
1202 lines
43 KiB
Python
Executable file
"""Routines related to PyPI, indexes"""
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from __future__ import absolute_import
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import logging
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import cgi
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import sys
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import os
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import re
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import mimetypes
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import posixpath
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import warnings
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from pip._vendor.six.moves.urllib import parse as urllib_parse
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from pip._vendor.six.moves.urllib import request as urllib_request
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from pip.compat import ipaddress
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from pip.utils import (
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Inf, cached_property, normalize_name, splitext, normalize_path)
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from pip.utils.deprecation import RemovedInPip7Warning, RemovedInPip8Warning
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from pip.utils.logging import indent_log
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from pip.exceptions import (
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DistributionNotFound, BestVersionAlreadyInstalled, InvalidWheelFilename,
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UnsupportedWheel,
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)
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from pip.download import url_to_path, path_to_url
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from pip.models import PyPI
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from pip.wheel import Wheel, wheel_ext
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from pip.pep425tags import supported_tags, supported_tags_noarch, get_platform
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from pip.req.req_requirement import InstallationCandidate
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from pip._vendor import html5lib, requests, pkg_resources, six
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from pip._vendor.packaging.version import parse as parse_version
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from pip._vendor.requests.exceptions import SSLError
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__all__ = ['PackageFinder']
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# Taken from Chrome's list of secure origins (See: http://bit.ly/1qrySKC)
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SECURE_ORIGINS = [
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# protocol, hostname, port
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("https", "*", "*"),
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("*", "localhost", "*"),
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("*", "127.0.0.0/8", "*"),
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("*", "::1/128", "*"),
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("file", "*", None),
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]
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logger = logging.getLogger(__name__)
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class PackageFinder(object):
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"""This finds packages.
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This is meant to match easy_install's technique for looking for
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packages, by reading pages and looking for appropriate links
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"""
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def __init__(self, find_links, index_urls,
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use_wheel=True, allow_external=(), allow_unverified=(),
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allow_all_external=False, allow_all_prereleases=False,
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trusted_hosts=None, process_dependency_links=False,
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session=None):
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if session is None:
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raise TypeError(
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"PackageFinder() missing 1 required keyword argument: "
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"'session'"
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)
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# Build find_links. If an argument starts with ~, it may be
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# a local file relative to a home directory. So try normalizing
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# it and if it exists, use the normalized version.
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# This is deliberately conservative - it might be fine just to
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# blindly normalize anything starting with a ~...
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self.find_links = []
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for link in find_links:
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if link.startswith('~'):
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new_link = normalize_path(link)
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if os.path.exists(new_link):
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link = new_link
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self.find_links.append(link)
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self.index_urls = index_urls
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self.dependency_links = []
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# These are boring links that have already been logged somehow:
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self.logged_links = set()
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self.use_wheel = use_wheel
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# Do we allow (safe and verifiable) externally hosted files?
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self.allow_external = set(normalize_name(n) for n in allow_external)
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# Which names are allowed to install insecure and unverifiable files?
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self.allow_unverified = set(
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normalize_name(n) for n in allow_unverified
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)
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# Anything that is allowed unverified is also allowed external
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self.allow_external |= self.allow_unverified
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# Do we allow all (safe and verifiable) externally hosted files?
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self.allow_all_external = allow_all_external
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# Domains that we won't emit warnings for when not using HTTPS
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self.secure_origins = [
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("*", host, "*")
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for host in (trusted_hosts if trusted_hosts else [])
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]
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# Stores if we ignored any external links so that we can instruct
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# end users how to install them if no distributions are available
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self.need_warn_external = False
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# Stores if we ignored any unsafe links so that we can instruct
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# end users how to install them if no distributions are available
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self.need_warn_unverified = False
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# Do we want to allow _all_ pre-releases?
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self.allow_all_prereleases = allow_all_prereleases
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# Do we process dependency links?
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self.process_dependency_links = process_dependency_links
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# The Session we'll use to make requests
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self.session = session
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def add_dependency_links(self, links):
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# # FIXME: this shouldn't be global list this, it should only
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# # apply to requirements of the package that specifies the
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# # dependency_links value
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# # FIXME: also, we should track comes_from (i.e., use Link)
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if self.process_dependency_links:
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warnings.warn(
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"Dependency Links processing has been deprecated and will be "
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"removed in a future release.",
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RemovedInPip7Warning,
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)
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self.dependency_links.extend(links)
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def _sort_locations(self, locations):
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"""
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Sort locations into "files" (archives) and "urls", and return
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a pair of lists (files,urls)
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"""
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files = []
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urls = []
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# puts the url for the given file path into the appropriate list
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def sort_path(path):
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url = path_to_url(path)
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if mimetypes.guess_type(url, strict=False)[0] == 'text/html':
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urls.append(url)
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else:
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files.append(url)
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for url in locations:
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is_local_path = os.path.exists(url)
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is_file_url = url.startswith('file:')
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is_find_link = url in self.find_links
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if is_local_path or is_file_url:
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if is_local_path:
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path = url
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else:
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path = url_to_path(url)
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if is_find_link and os.path.isdir(path):
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path = os.path.realpath(path)
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for item in os.listdir(path):
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sort_path(os.path.join(path, item))
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elif is_file_url and os.path.isdir(path):
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urls.append(url)
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elif os.path.isfile(path):
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sort_path(path)
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else:
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urls.append(url)
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return files, urls
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def _candidate_sort_key(self, candidate):
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"""
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Function used to generate link sort key for link tuples.
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The greater the return value, the more preferred it is.
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If not finding wheels, then sorted by version only.
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If finding wheels, then the sort order is by version, then:
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1. existing installs
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2. wheels ordered via Wheel.support_index_min()
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3. source archives
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Note: it was considered to embed this logic into the Link
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comparison operators, but then different sdist links
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with the same version, would have to be considered equal
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"""
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if self.use_wheel:
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support_num = len(supported_tags)
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if candidate.location == INSTALLED_VERSION:
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pri = 1
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elif candidate.location.is_wheel:
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# can raise InvalidWheelFilename
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wheel = Wheel(candidate.location.filename)
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if not wheel.supported():
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raise UnsupportedWheel(
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"%s is not a supported wheel for this platform. It "
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"can't be sorted." % wheel.filename
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)
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pri = -(wheel.support_index_min())
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else: # sdist
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pri = -(support_num)
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return (candidate.version, pri)
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else:
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return candidate.version
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def _sort_versions(self, applicable_versions):
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"""
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Bring the latest version (and wheels) to the front, but maintain the
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existing ordering as secondary. See the docstring for `_link_sort_key`
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for details. This function is isolated for easier unit testing.
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"""
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return sorted(
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applicable_versions,
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key=self._candidate_sort_key,
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reverse=True
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)
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def _validate_secure_origin(self, logger, location):
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# Determine if this url used a secure transport mechanism
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parsed = urllib_parse.urlparse(str(location))
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origin = (parsed.scheme, parsed.hostname, parsed.port)
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# Determine if our origin is a secure origin by looking through our
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# hardcoded list of secure origins, as well as any additional ones
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# configured on this PackageFinder instance.
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for secure_origin in (SECURE_ORIGINS + self.secure_origins):
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# Check to see if the protocol matches
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if origin[0] != secure_origin[0] and secure_origin[0] != "*":
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continue
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try:
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# We need to do this decode dance to ensure that we have a
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# unicode object, even on Python 2.x.
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addr = ipaddress.ip_address(
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origin[1]
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if (
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isinstance(origin[1], six.text_type) or
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origin[1] is None
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)
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else origin[1].decode("utf8")
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)
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network = ipaddress.ip_network(
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secure_origin[1]
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if isinstance(secure_origin[1], six.text_type)
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else secure_origin[1].decode("utf8")
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)
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except ValueError:
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# We don't have both a valid address or a valid network, so
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# we'll check this origin against hostnames.
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if origin[1] != secure_origin[1] and secure_origin[1] != "*":
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continue
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else:
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# We have a valid address and network, so see if the address
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# is contained within the network.
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if addr not in network:
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continue
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# Check to see if the port patches
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if (origin[2] != secure_origin[2] and
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secure_origin[2] != "*" and
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secure_origin[2] is not None):
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continue
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# If we've gotten here, then this origin matches the current
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# secure origin and we should break out of the loop and continue
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# on.
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break
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else:
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# If the loop successfully completed without a break, that means
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# that the origin we are testing is not a secure origin.
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logger.warning(
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"This repository located at %s is not a trusted host, if "
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"this repository is available via HTTPS it is recommend to "
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"use HTTPS instead, otherwise you may silence this warning "
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"with '--trusted-host %s'.",
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parsed.hostname,
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parsed.hostname,
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)
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warnings.warn(
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"Implicitly allowing locations which are not hosted at a "
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"secure origin is deprecated and will require the use of "
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"--trusted-host in the future.",
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RemovedInPip7Warning,
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)
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def _get_index_urls_locations(self, project_name):
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"""Returns the locations found via self.index_urls
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Checks the url_name on the main (first in the list) index and
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use this url_name to produce all locations
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"""
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def mkurl_pypi_url(url):
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loc = posixpath.join(url, project_url_name)
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# For maximum compatibility with easy_install, ensure the path
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# ends in a trailing slash. Although this isn't in the spec
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# (and PyPI can handle it without the slash) some other index
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# implementations might break if they relied on easy_install's
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# behavior.
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if not loc.endswith('/'):
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loc = loc + '/'
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return loc
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project_url_name = urllib_parse.quote(project_name.lower())
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if self.index_urls:
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# Check that we have the url_name correctly spelled:
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# Only check main index if index URL is given
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main_index_url = Link(
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mkurl_pypi_url(self.index_urls[0]),
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trusted=True,
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)
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page = self._get_page(main_index_url)
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if page is None and PyPI.netloc not in str(main_index_url):
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warnings.warn(
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"Failed to find %r at %s. It is suggested to upgrade "
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"your index to support normalized names as the name in "
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"/simple/{name}." % (project_name, main_index_url),
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RemovedInPip8Warning,
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)
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project_url_name = self._find_url_name(
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Link(self.index_urls[0], trusted=True),
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project_url_name,
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) or project_url_name
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if project_url_name is not None:
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return [mkurl_pypi_url(url) for url in self.index_urls]
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return []
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def _find_all_versions(self, project_name):
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"""Find all available versions for project_name
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This checks index_urls, find_links and dependency_links
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All versions found are returned
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See _link_package_versions for details on which files are accepted
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"""
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index_locations = self._get_index_urls_locations(project_name)
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file_locations, url_locations = self._sort_locations(index_locations)
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fl_file_loc, fl_url_loc = self._sort_locations(self.find_links)
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file_locations.extend(fl_file_loc)
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url_locations.extend(fl_url_loc)
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_flocations, _ulocations = self._sort_locations(self.dependency_links)
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file_locations.extend(_flocations)
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# We trust every url that the user has given us whether it was given
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# via --index-url or --find-links
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locations = [Link(url, trusted=True) for url in url_locations]
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# We explicitly do not trust links that came from dependency_links
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locations.extend([Link(url) for url in _ulocations])
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logger.debug('%d location(s) to search for versions of %s:',
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len(locations), project_name)
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for location in locations:
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logger.debug('* %s', location)
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self._validate_secure_origin(logger, location)
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find_links_versions = list(self._package_versions(
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# We trust every directly linked archive in find_links
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(Link(url, '-f', trusted=True) for url in self.find_links),
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project_name.lower()
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))
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page_versions = []
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for page in self._get_pages(locations, project_name):
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logger.debug('Analyzing links from page %s', page.url)
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with indent_log():
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page_versions.extend(
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self._package_versions(page.links, project_name.lower())
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)
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dependency_versions = list(self._package_versions(
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(Link(url) for url in self.dependency_links), project_name.lower()
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))
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if dependency_versions:
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logger.debug(
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'dependency_links found: %s',
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', '.join([
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version.location.url for version in dependency_versions
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])
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)
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file_versions = list(
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self._package_versions(
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(Link(url) for url in file_locations),
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project_name.lower()
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)
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)
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if file_versions:
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file_versions.sort(reverse=True)
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logger.debug(
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'Local files found: %s',
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', '.join([
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url_to_path(candidate.location.url)
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for candidate in file_versions
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])
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)
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# This is an intentional priority ordering
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return (
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file_versions + find_links_versions + page_versions +
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dependency_versions
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)
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def find_requirement(self, req, upgrade):
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"""Try to find an InstallationCandidate for req
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Expects req, an InstallRequirement and upgrade, a boolean
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Returns an InstallationCandidate or None
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May raise DistributionNotFound or BestVersionAlreadyInstalled
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"""
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all_versions = self._find_all_versions(req.name)
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# Filter out anything which doesn't match our specifier
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_versions = set(
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req.specifier.filter(
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[x.version for x in all_versions],
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prereleases=(
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self.allow_all_prereleases
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if self.allow_all_prereleases else None
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),
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)
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)
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applicable_versions = [
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x for x in all_versions if x.version in _versions
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]
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if req.satisfied_by is not None:
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# Finally add our existing versions to the front of our versions.
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applicable_versions.insert(
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0,
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InstallationCandidate(
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req.name,
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req.satisfied_by.version,
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INSTALLED_VERSION,
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)
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)
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existing_applicable = True
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else:
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existing_applicable = False
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applicable_versions = self._sort_versions(applicable_versions)
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if not upgrade and existing_applicable:
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if applicable_versions[0].location is INSTALLED_VERSION:
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logger.debug(
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'Existing installed version (%s) is most up-to-date and '
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'satisfies requirement',
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req.satisfied_by.version,
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)
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else:
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logger.debug(
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'Existing installed version (%s) satisfies requirement '
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'(most up-to-date version is %s)',
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req.satisfied_by.version,
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applicable_versions[0][2],
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)
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return None
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|
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if not applicable_versions:
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logger.critical(
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'Could not find a version that satisfies the requirement %s '
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'(from versions: %s)',
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req,
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', '.join(
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sorted(
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set(str(i.version) for i in all_versions),
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key=parse_version,
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)
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)
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)
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|
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if self.need_warn_external:
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logger.warning(
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"Some externally hosted files were ignored as access to "
|
|
"them may be unreliable (use --allow-external %s to "
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"allow).",
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req.name,
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)
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if self.need_warn_unverified:
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logger.warning(
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"Some insecure and unverifiable files were ignored"
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" (use --allow-unverified %s to allow).",
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req.name,
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)
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raise DistributionNotFound(
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'No matching distribution found for %s' % req
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)
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if applicable_versions[0].location is INSTALLED_VERSION:
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# We have an existing version, and its the best version
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logger.debug(
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'Installed version (%s) is most up-to-date (past versions: '
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'%s)',
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req.satisfied_by.version,
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', '.join(str(i.version) for i in applicable_versions[1:]) or
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"none",
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)
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raise BestVersionAlreadyInstalled
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if len(applicable_versions) > 1:
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logger.debug(
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'Using version %s (newest of versions: %s)',
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applicable_versions[0].version,
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', '.join(str(i.version) for i in applicable_versions)
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)
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selected_version = applicable_versions[0].location
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if (selected_version.verifiable is not None and not
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selected_version.verifiable):
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logger.warning(
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"%s is potentially insecure and unverifiable.", req.name,
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)
|
|
|
|
if selected_version._deprecated_regex:
|
|
warnings.warn(
|
|
"%s discovered using a deprecated method of parsing, in the "
|
|
"future it will no longer be discovered." % req.name,
|
|
RemovedInPip7Warning,
|
|
)
|
|
|
|
return selected_version
|
|
|
|
def _find_url_name(self, index_url, url_name):
|
|
"""
|
|
Finds the true URL name of a package, when the given name isn't quite
|
|
correct.
|
|
This is usually used to implement case-insensitivity.
|
|
"""
|
|
if not index_url.url.endswith('/'):
|
|
# Vaguely part of the PyPI API... weird but true.
|
|
# FIXME: bad to modify this?
|
|
index_url.url += '/'
|
|
page = self._get_page(index_url)
|
|
if page is None:
|
|
logger.critical('Cannot fetch index base URL %s', index_url)
|
|
return
|
|
norm_name = normalize_name(url_name)
|
|
for link in page.links:
|
|
base = posixpath.basename(link.path.rstrip('/'))
|
|
if norm_name == normalize_name(base):
|
|
logger.debug(
|
|
'Real name of requirement %s is %s', url_name, base,
|
|
)
|
|
return base
|
|
return None
|
|
|
|
def _get_pages(self, locations, project_name):
|
|
"""
|
|
Yields (page, page_url) from the given locations, skipping
|
|
locations that have errors, and adding download/homepage links
|
|
"""
|
|
all_locations = list(locations)
|
|
seen = set()
|
|
normalized = normalize_name(project_name)
|
|
|
|
while all_locations:
|
|
location = all_locations.pop(0)
|
|
if location in seen:
|
|
continue
|
|
seen.add(location)
|
|
|
|
page = self._get_page(location)
|
|
if page is None:
|
|
continue
|
|
|
|
yield page
|
|
|
|
for link in page.rel_links():
|
|
|
|
if (normalized not in self.allow_external and not
|
|
self.allow_all_external):
|
|
self.need_warn_external = True
|
|
logger.debug(
|
|
"Not searching %s for files because external "
|
|
"urls are disallowed.",
|
|
link,
|
|
)
|
|
continue
|
|
|
|
if (link.trusted is not None and not
|
|
link.trusted and
|
|
normalized not in self.allow_unverified):
|
|
logger.debug(
|
|
"Not searching %s for urls, it is an "
|
|
"untrusted link and cannot produce safe or "
|
|
"verifiable files.",
|
|
link,
|
|
)
|
|
self.need_warn_unverified = True
|
|
continue
|
|
|
|
all_locations.append(link)
|
|
|
|
_egg_fragment_re = re.compile(r'#egg=([^&]*)')
|
|
_egg_info_re = re.compile(r'([a-z0-9_.]+)-([a-z0-9_.!+-]+)', re.I)
|
|
_py_version_re = re.compile(r'-py([123]\.?[0-9]?)$')
|
|
|
|
def _sort_links(self, links):
|
|
"""
|
|
Returns elements of links in order, non-egg links first, egg links
|
|
second, while eliminating duplicates
|
|
"""
|
|
eggs, no_eggs = [], []
|
|
seen = set()
|
|
for link in links:
|
|
if link not in seen:
|
|
seen.add(link)
|
|
if link.egg_fragment:
|
|
eggs.append(link)
|
|
else:
|
|
no_eggs.append(link)
|
|
return no_eggs + eggs
|
|
|
|
def _package_versions(self, links, search_name):
|
|
for link in self._sort_links(links):
|
|
v = self._link_package_versions(link, search_name)
|
|
if v is not None:
|
|
yield v
|
|
|
|
def _known_extensions(self):
|
|
extensions = ('.tar.gz', '.tar.bz2', '.tar', '.tgz', '.zip')
|
|
if self.use_wheel:
|
|
return extensions + (wheel_ext,)
|
|
return extensions
|
|
|
|
def _link_package_versions(self, link, search_name):
|
|
"""Return an InstallationCandidate or None"""
|
|
platform = get_platform()
|
|
|
|
version = None
|
|
if link.egg_fragment:
|
|
egg_info = link.egg_fragment
|
|
else:
|
|
egg_info, ext = link.splitext()
|
|
if not ext:
|
|
if link not in self.logged_links:
|
|
logger.debug('Skipping link %s; not a file', link)
|
|
self.logged_links.add(link)
|
|
return
|
|
if egg_info.endswith('.tar'):
|
|
# Special double-extension case:
|
|
egg_info = egg_info[:-4]
|
|
ext = '.tar' + ext
|
|
if ext not in self._known_extensions():
|
|
if link not in self.logged_links:
|
|
logger.debug(
|
|
'Skipping link %s; unknown archive format: %s',
|
|
link,
|
|
ext,
|
|
)
|
|
self.logged_links.add(link)
|
|
return
|
|
if "macosx10" in link.path and ext == '.zip':
|
|
if link not in self.logged_links:
|
|
logger.debug('Skipping link %s; macosx10 one', link)
|
|
self.logged_links.add(link)
|
|
return
|
|
if ext == wheel_ext:
|
|
try:
|
|
wheel = Wheel(link.filename)
|
|
except InvalidWheelFilename:
|
|
logger.debug(
|
|
'Skipping %s because the wheel filename is invalid',
|
|
link
|
|
)
|
|
return
|
|
if (pkg_resources.safe_name(wheel.name).lower() !=
|
|
pkg_resources.safe_name(search_name).lower()):
|
|
logger.debug(
|
|
'Skipping link %s; wrong project name (not %s)',
|
|
link,
|
|
search_name,
|
|
)
|
|
return
|
|
if not wheel.supported():
|
|
logger.debug(
|
|
'Skipping %s because it is not compatible with this '
|
|
'Python',
|
|
link,
|
|
)
|
|
return
|
|
# This is a dirty hack to prevent installing Binary Wheels from
|
|
# PyPI unless it is a Windows or Mac Binary Wheel. This is
|
|
# paired with a change to PyPI disabling uploads for the
|
|
# same. Once we have a mechanism for enabling support for
|
|
# binary wheels on linux that deals with the inherent problems
|
|
# of binary distribution this can be removed.
|
|
comes_from = getattr(link, "comes_from", None)
|
|
if (
|
|
(
|
|
not platform.startswith('win') and not
|
|
platform.startswith('macosx') and not
|
|
platform == 'cli'
|
|
) and
|
|
comes_from is not None and
|
|
urllib_parse.urlparse(
|
|
comes_from.url
|
|
).netloc.endswith(PyPI.netloc)):
|
|
if not wheel.supported(tags=supported_tags_noarch):
|
|
logger.debug(
|
|
"Skipping %s because it is a pypi-hosted binary "
|
|
"Wheel on an unsupported platform",
|
|
link,
|
|
)
|
|
return
|
|
version = wheel.version
|
|
|
|
if not version:
|
|
version = self._egg_info_matches(egg_info, search_name, link)
|
|
if version is None:
|
|
logger.debug(
|
|
'Skipping link %s; wrong project name (not %s)',
|
|
link,
|
|
search_name,
|
|
)
|
|
return
|
|
|
|
if (link.internal is not None and not
|
|
link.internal and not
|
|
normalize_name(search_name).lower()
|
|
in self.allow_external and not
|
|
self.allow_all_external):
|
|
# We have a link that we are sure is external, so we should skip
|
|
# it unless we are allowing externals
|
|
logger.debug("Skipping %s because it is externally hosted.", link)
|
|
self.need_warn_external = True
|
|
return
|
|
|
|
if (link.verifiable is not None and not
|
|
link.verifiable and not
|
|
(normalize_name(search_name).lower()
|
|
in self.allow_unverified)):
|
|
# We have a link that we are sure we cannot verify its integrity,
|
|
# so we should skip it unless we are allowing unsafe installs
|
|
# for this requirement.
|
|
logger.debug(
|
|
"Skipping %s because it is an insecure and unverifiable file.",
|
|
link,
|
|
)
|
|
self.need_warn_unverified = True
|
|
return
|
|
|
|
match = self._py_version_re.search(version)
|
|
if match:
|
|
version = version[:match.start()]
|
|
py_version = match.group(1)
|
|
if py_version != sys.version[:3]:
|
|
logger.debug(
|
|
'Skipping %s because Python version is incorrect', link
|
|
)
|
|
return
|
|
logger.debug('Found link %s, version: %s', link, version)
|
|
|
|
return InstallationCandidate(search_name, version, link)
|
|
|
|
def _egg_info_matches(self, egg_info, search_name, link):
|
|
match = self._egg_info_re.search(egg_info)
|
|
if not match:
|
|
logger.debug('Could not parse version from link: %s', link)
|
|
return None
|
|
name = match.group(0).lower()
|
|
# To match the "safe" name that pkg_resources creates:
|
|
name = name.replace('_', '-')
|
|
# project name and version must be separated by a dash
|
|
look_for = search_name.lower() + "-"
|
|
if name.startswith(look_for):
|
|
return match.group(0)[len(look_for):]
|
|
else:
|
|
return None
|
|
|
|
def _get_page(self, link):
|
|
return HTMLPage.get_page(link, session=self.session)
|
|
|
|
|
|
class HTMLPage(object):
|
|
"""Represents one page, along with its URL"""
|
|
|
|
# FIXME: these regexes are horrible hacks:
|
|
_homepage_re = re.compile(b'<th>\\s*home\\s*page', re.I)
|
|
_download_re = re.compile(b'<th>\\s*download\\s+url', re.I)
|
|
_href_re = re.compile(
|
|
b'href=(?:"([^"]*)"|\'([^\']*)\'|([^>\\s\\n]*))',
|
|
re.I | re.S
|
|
)
|
|
|
|
def __init__(self, content, url, headers=None, trusted=None):
|
|
# Determine if we have any encoding information in our headers
|
|
encoding = None
|
|
if headers and "Content-Type" in headers:
|
|
content_type, params = cgi.parse_header(headers["Content-Type"])
|
|
|
|
if "charset" in params:
|
|
encoding = params['charset']
|
|
|
|
self.content = content
|
|
self.parsed = html5lib.parse(
|
|
self.content,
|
|
encoding=encoding,
|
|
namespaceHTMLElements=False,
|
|
)
|
|
self.url = url
|
|
self.headers = headers
|
|
self.trusted = trusted
|
|
|
|
def __str__(self):
|
|
return self.url
|
|
|
|
@classmethod
|
|
def get_page(cls, link, skip_archives=True, session=None):
|
|
if session is None:
|
|
raise TypeError(
|
|
"get_page() missing 1 required keyword argument: 'session'"
|
|
)
|
|
|
|
url = link.url
|
|
url = url.split('#', 1)[0]
|
|
|
|
# Check for VCS schemes that do not support lookup as web pages.
|
|
from pip.vcs import VcsSupport
|
|
for scheme in VcsSupport.schemes:
|
|
if url.lower().startswith(scheme) and url[len(scheme)] in '+:':
|
|
logger.debug('Cannot look at %s URL %s', scheme, link)
|
|
return None
|
|
|
|
try:
|
|
if skip_archives:
|
|
filename = link.filename
|
|
for bad_ext in ['.tar', '.tar.gz', '.tar.bz2', '.tgz', '.zip']:
|
|
if filename.endswith(bad_ext):
|
|
content_type = cls._get_content_type(
|
|
url, session=session,
|
|
)
|
|
if content_type.lower().startswith('text/html'):
|
|
break
|
|
else:
|
|
logger.debug(
|
|
'Skipping page %s because of Content-Type: %s',
|
|
link,
|
|
content_type,
|
|
)
|
|
return
|
|
|
|
logger.debug('Getting page %s', url)
|
|
|
|
# Tack index.html onto file:// URLs that point to directories
|
|
(scheme, netloc, path, params, query, fragment) = \
|
|
urllib_parse.urlparse(url)
|
|
if (scheme == 'file' and
|
|
os.path.isdir(urllib_request.url2pathname(path))):
|
|
# add trailing slash if not present so urljoin doesn't trim
|
|
# final segment
|
|
if not url.endswith('/'):
|
|
url += '/'
|
|
url = urllib_parse.urljoin(url, 'index.html')
|
|
logger.debug(' file: URL is directory, getting %s', url)
|
|
|
|
resp = session.get(
|
|
url,
|
|
headers={
|
|
"Accept": "text/html",
|
|
"Cache-Control": "max-age=600",
|
|
},
|
|
)
|
|
resp.raise_for_status()
|
|
|
|
# The check for archives above only works if the url ends with
|
|
# something that looks like an archive. However that is not a
|
|
# requirement of an url. Unless we issue a HEAD request on every
|
|
# url we cannot know ahead of time for sure if something is HTML
|
|
# or not. However we can check after we've downloaded it.
|
|
content_type = resp.headers.get('Content-Type', 'unknown')
|
|
if not content_type.lower().startswith("text/html"):
|
|
logger.debug(
|
|
'Skipping page %s because of Content-Type: %s',
|
|
link,
|
|
content_type,
|
|
)
|
|
return
|
|
|
|
inst = cls(
|
|
resp.content, resp.url, resp.headers,
|
|
trusted=link.trusted,
|
|
)
|
|
except requests.HTTPError as exc:
|
|
level = 2 if exc.response.status_code == 404 else 1
|
|
cls._handle_fail(link, exc, url, level=level)
|
|
except requests.ConnectionError as exc:
|
|
cls._handle_fail(link, "connection error: %s" % exc, url)
|
|
except requests.Timeout:
|
|
cls._handle_fail(link, "timed out", url)
|
|
except SSLError as exc:
|
|
reason = ("There was a problem confirming the ssl certificate: "
|
|
"%s" % exc)
|
|
cls._handle_fail(link, reason, url, level=2, meth=logger.info)
|
|
else:
|
|
return inst
|
|
|
|
@staticmethod
|
|
def _handle_fail(link, reason, url, level=1, meth=None):
|
|
if meth is None:
|
|
meth = logger.debug
|
|
|
|
meth("Could not fetch URL %s: %s - skipping", link, reason)
|
|
|
|
@staticmethod
|
|
def _get_content_type(url, session):
|
|
"""Get the Content-Type of the given url, using a HEAD request"""
|
|
scheme, netloc, path, query, fragment = urllib_parse.urlsplit(url)
|
|
if scheme not in ('http', 'https'):
|
|
# FIXME: some warning or something?
|
|
# assertion error?
|
|
return ''
|
|
|
|
resp = session.head(url, allow_redirects=True)
|
|
resp.raise_for_status()
|
|
|
|
return resp.headers.get("Content-Type", "")
|
|
|
|
@cached_property
|
|
def api_version(self):
|
|
metas = [
|
|
x for x in self.parsed.findall(".//meta")
|
|
if x.get("name", "").lower() == "api-version"
|
|
]
|
|
if metas:
|
|
try:
|
|
return int(metas[0].get("value", None))
|
|
except (TypeError, ValueError):
|
|
pass
|
|
|
|
return None
|
|
|
|
@cached_property
|
|
def base_url(self):
|
|
bases = [
|
|
x for x in self.parsed.findall(".//base")
|
|
if x.get("href") is not None
|
|
]
|
|
if bases and bases[0].get("href"):
|
|
return bases[0].get("href")
|
|
else:
|
|
return self.url
|
|
|
|
@property
|
|
def links(self):
|
|
"""Yields all links in the page"""
|
|
for anchor in self.parsed.findall(".//a"):
|
|
if anchor.get("href"):
|
|
href = anchor.get("href")
|
|
url = self.clean_link(
|
|
urllib_parse.urljoin(self.base_url, href)
|
|
)
|
|
|
|
# Determine if this link is internal. If that distinction
|
|
# doesn't make sense in this context, then we don't make
|
|
# any distinction.
|
|
internal = None
|
|
if self.api_version and self.api_version >= 2:
|
|
# Only api_versions >= 2 have a distinction between
|
|
# external and internal links
|
|
internal = bool(
|
|
anchor.get("rel") and
|
|
"internal" in anchor.get("rel").split()
|
|
)
|
|
|
|
yield Link(url, self, internal=internal)
|
|
|
|
def rel_links(self):
|
|
for url in self.explicit_rel_links():
|
|
yield url
|
|
for url in self.scraped_rel_links():
|
|
yield url
|
|
|
|
def explicit_rel_links(self, rels=('homepage', 'download')):
|
|
"""Yields all links with the given relations"""
|
|
rels = set(rels)
|
|
|
|
for anchor in self.parsed.findall(".//a"):
|
|
if anchor.get("rel") and anchor.get("href"):
|
|
found_rels = set(anchor.get("rel").split())
|
|
# Determine the intersection between what rels were found and
|
|
# what rels were being looked for
|
|
if found_rels & rels:
|
|
href = anchor.get("href")
|
|
url = self.clean_link(
|
|
urllib_parse.urljoin(self.base_url, href)
|
|
)
|
|
yield Link(url, self, trusted=False)
|
|
|
|
def scraped_rel_links(self):
|
|
# Can we get rid of this horrible horrible method?
|
|
for regex in (self._homepage_re, self._download_re):
|
|
match = regex.search(self.content)
|
|
if not match:
|
|
continue
|
|
href_match = self._href_re.search(self.content, pos=match.end())
|
|
if not href_match:
|
|
continue
|
|
url = (
|
|
href_match.group(1) or
|
|
href_match.group(2) or
|
|
href_match.group(3)
|
|
)
|
|
if not url:
|
|
continue
|
|
try:
|
|
url = url.decode("ascii")
|
|
except UnicodeDecodeError:
|
|
continue
|
|
url = self.clean_link(urllib_parse.urljoin(self.base_url, url))
|
|
yield Link(url, self, trusted=False, _deprecated_regex=True)
|
|
|
|
_clean_re = re.compile(r'[^a-z0-9$&+,/:;=?@.#%_\\|-]', re.I)
|
|
|
|
def clean_link(self, url):
|
|
"""Makes sure a link is fully encoded. That is, if a ' ' shows up in
|
|
the link, it will be rewritten to %20 (while not over-quoting
|
|
% or other characters)."""
|
|
return self._clean_re.sub(
|
|
lambda match: '%%%2x' % ord(match.group(0)), url)
|
|
|
|
|
|
class Link(object):
|
|
|
|
def __init__(self, url, comes_from=None, internal=None, trusted=None,
|
|
_deprecated_regex=False):
|
|
|
|
# url can be a UNC windows share
|
|
if url != Inf and url.startswith('\\\\'):
|
|
url = path_to_url(url)
|
|
|
|
self.url = url
|
|
self.comes_from = comes_from
|
|
self.internal = internal
|
|
self.trusted = trusted
|
|
self._deprecated_regex = _deprecated_regex
|
|
|
|
def __str__(self):
|
|
if self.comes_from:
|
|
return '%s (from %s)' % (self.url, self.comes_from)
|
|
else:
|
|
return str(self.url)
|
|
|
|
def __repr__(self):
|
|
return '<Link %s>' % self
|
|
|
|
def __eq__(self, other):
|
|
if not isinstance(other, Link):
|
|
return NotImplemented
|
|
return self.url == other.url
|
|
|
|
def __ne__(self, other):
|
|
if not isinstance(other, Link):
|
|
return NotImplemented
|
|
return self.url != other.url
|
|
|
|
def __lt__(self, other):
|
|
if not isinstance(other, Link):
|
|
return NotImplemented
|
|
return self.url < other.url
|
|
|
|
def __le__(self, other):
|
|
if not isinstance(other, Link):
|
|
return NotImplemented
|
|
return self.url <= other.url
|
|
|
|
def __gt__(self, other):
|
|
if not isinstance(other, Link):
|
|
return NotImplemented
|
|
return self.url > other.url
|
|
|
|
def __ge__(self, other):
|
|
if not isinstance(other, Link):
|
|
return NotImplemented
|
|
return self.url >= other.url
|
|
|
|
def __hash__(self):
|
|
return hash(self.url)
|
|
|
|
@property
|
|
def filename(self):
|
|
_, netloc, path, _, _ = urllib_parse.urlsplit(self.url)
|
|
name = posixpath.basename(path.rstrip('/')) or netloc
|
|
name = urllib_parse.unquote(name)
|
|
assert name, ('URL %r produced no filename' % self.url)
|
|
return name
|
|
|
|
@property
|
|
def scheme(self):
|
|
return urllib_parse.urlsplit(self.url)[0]
|
|
|
|
@property
|
|
def netloc(self):
|
|
return urllib_parse.urlsplit(self.url)[1]
|
|
|
|
@property
|
|
def path(self):
|
|
return urllib_parse.unquote(urllib_parse.urlsplit(self.url)[2])
|
|
|
|
def splitext(self):
|
|
return splitext(posixpath.basename(self.path.rstrip('/')))
|
|
|
|
@property
|
|
def ext(self):
|
|
return self.splitext()[1]
|
|
|
|
@property
|
|
def url_without_fragment(self):
|
|
scheme, netloc, path, query, fragment = urllib_parse.urlsplit(self.url)
|
|
return urllib_parse.urlunsplit((scheme, netloc, path, query, None))
|
|
|
|
_egg_fragment_re = re.compile(r'#egg=([^&]*)')
|
|
|
|
@property
|
|
def egg_fragment(self):
|
|
match = self._egg_fragment_re.search(self.url)
|
|
if not match:
|
|
return None
|
|
return match.group(1)
|
|
|
|
_hash_re = re.compile(
|
|
r'(sha1|sha224|sha384|sha256|sha512|md5)=([a-f0-9]+)'
|
|
)
|
|
|
|
@property
|
|
def hash(self):
|
|
match = self._hash_re.search(self.url)
|
|
if match:
|
|
return match.group(2)
|
|
return None
|
|
|
|
@property
|
|
def hash_name(self):
|
|
match = self._hash_re.search(self.url)
|
|
if match:
|
|
return match.group(1)
|
|
return None
|
|
|
|
@property
|
|
def show_url(self):
|
|
return posixpath.basename(self.url.split('#', 1)[0].split('?', 1)[0])
|
|
|
|
@property
|
|
def verifiable(self):
|
|
"""
|
|
Returns True if this link can be verified after download, False if it
|
|
cannot, and None if we cannot determine.
|
|
"""
|
|
trusted = self.trusted or getattr(self.comes_from, "trusted", None)
|
|
if trusted is not None and trusted:
|
|
# This link came from a trusted source. It *may* be verifiable but
|
|
# first we need to see if this page is operating under the new
|
|
# API version.
|
|
try:
|
|
api_version = getattr(self.comes_from, "api_version", None)
|
|
api_version = int(api_version)
|
|
except (ValueError, TypeError):
|
|
api_version = None
|
|
|
|
if api_version is None or api_version <= 1:
|
|
# This link is either trusted, or it came from a trusted,
|
|
# however it is not operating under the API version 2 so
|
|
# we can't make any claims about if it's safe or not
|
|
return
|
|
|
|
if self.hash:
|
|
# This link came from a trusted source and it has a hash, so we
|
|
# can consider it safe.
|
|
return True
|
|
else:
|
|
# This link came from a trusted source, using the new API
|
|
# version, and it does not have a hash. It is NOT verifiable
|
|
return False
|
|
elif trusted is not None:
|
|
# This link came from an untrusted source and we cannot trust it
|
|
return False
|
|
|
|
@property
|
|
def is_wheel(self):
|
|
return self.ext == wheel_ext
|
|
|
|
|
|
# An object to represent the "link" for the installed version of a requirement.
|
|
# Using Inf as the url makes it sort higher.
|
|
INSTALLED_VERSION = Link(Inf)
|