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link.py
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import os import posixpath import re from pip._vendor.six.moves.urllib import parse as urllib_parse from pip._internal.utils.filetypes import WHEEL_EXTENSION from pip._internal.utils.misc import ( redact_auth_from_url, split_auth_from_netloc, splitext, ) from pip._internal.utils.models import KeyBasedCompareMixin from pip._internal.utils.typing import MYPY_CHECK_RUNNING from pip._internal.utils.urls import path_to_url, url_to_path if MYPY_CHECK_RUNNING: from typing import Optional, Text, Tuple, Union from pip._internal.index.collector import HTMLPage from pip._internal.utils.hashes import Hashes class Link(KeyBasedCompareMixin): """Represents a parsed link from a Package Index's simple URL """ __slots__ = [ "_parsed_url", "_url", "comes_from", "requires_python", "yanked_reason", "cache_link_parsing", ] def __init__( self, url, # type: str comes_from=None, # type: Optional[Union[str, HTMLPage]] requires_python=None, # type: Optional[str] yanked_reason=None, # type: Optional[Text] cache_link_parsing=True, # type: bool ): # type: (...) -> None """ :param url: url of the resource pointed to (href of the link) :param comes_from: instance of HTMLPage where the link was found, or string. :param requires_python: String containing the `Requires-Python` metadata field, specified in PEP 345. This may be specified by a data-requires-python attribute in the HTML link tag, as described in PEP 503. :param yanked_reason: the reason the file has been yanked, if the file has been yanked, or None if the file hasn't been yanked. This is the value of the "data-yanked" attribute, if present, in a simple repository HTML link. If the file has been yanked but no reason was provided, this should be the empty string. See PEP 592 for more information and the specification. :param cache_link_parsing: A flag that is used elsewhere to determine whether resources retrieved from this link should be cached. PyPI index urls should generally have this set to False, for example. """ # url can be a UNC windows share if url.startswith('\\\\'): url = path_to_url(url) self._parsed_url = urllib_parse.urlsplit(url) # Store the url as a private attribute to prevent accidentally # trying to set a new value. self._url = url self.comes_from = comes_from self.requires_python = requires_python if requires_python else None self.yanked_reason = yanked_reason super(Link, self).__init__(key=url, defining_class=Link) self.cache_link_parsing = cache_link_parsing def __str__(self): # type: () -> str if self.requires_python: rp = ' (requires-python:{})'.format(self.requires_python) else: rp = '' if self.comes_from: return '{} (from {}){}'.format( redact_auth_from_url(self._url), self.comes_from, rp) else: return redact_auth_from_url(str(self._url)) def __repr__(self): # type: () -> str return '<Link {}>'.format(self) @property def url(self): # type: () -> str return self._url @property def filename(self): # type: () -> str path = self.path.rstrip('/') name = posixpath.basename(path) if not name: # Make sure we don't leak auth information if the netloc # includes a username and password. netloc, user_pass = split_auth_from_netloc(self.netloc) return netloc name = urllib_parse.unquote(name) assert name, ( 'URL {self._url!r} produced no filename'.format(**locals())) return name @property def file_path(self): # type: () -> str return url_to_path(self.url) @property def scheme(self): # type: () -> str return self._parsed_url.scheme @property def netloc(self): # type: () -> str """ This can contain auth information. """ return self._parsed_url.netloc @property def path(self): # type: () -> str return urllib_parse.unquote(self._parsed_url.path) def splitext(self): # type: () -> Tuple[str, str] return splitext(posixpath.basename(self.path.rstrip('/'))) @property def ext(self): # type: () -> str return self.splitext()[1] @property def url_without_fragment(self): # type: () -> str scheme, netloc, path, query, fragment = self._parsed_url return urllib_parse.urlunsplit((scheme, netloc, path, query, None)) _egg_fragment_re = re.compile(r'[#&]egg=([^&]*)') @property def egg_fragment(self): # type: () -> Optional[str] match = self._egg_fragment_re.search(self._url) if not match: return None return match.group(1) _subdirectory_fragment_re = re.compile(r'[#&]subdirectory=([^&]*)') @property def subdirectory_fragment(self): # type: () -> Optional[str] match = self._subdirectory_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): # type: () -> Optional[str] match = self._hash_re.search(self._url) if match: return match.group(2) return None @property def hash_name(self): # type: () -> Optional[str] match = self._hash_re.search(self._url) if match: return match.group(1) return None @property def show_url(self): # type: () -> str return posixpath.basename(self._url.split('#', 1)[0].split('?', 1)[0]) @property def is_file(self): # type: () -> bool return self.scheme == 'file' def is_existing_dir(self): # type: () -> bool return self.is_file and os.path.isdir(self.file_path) @property def is_wheel(self): # type: () -> bool return self.ext == WHEEL_EXTENSION @property def is_vcs(self): # type: () -> bool from pip._internal.vcs import vcs return self.scheme in vcs.all_schemes @property def is_yanked(self): # type: () -> bool return self.yanked_reason is not None @property def has_hash(self): # type: () -> bool return self.hash_name is not None def is_hash_allowed(self, hashes): # type: (Optional[Hashes]) -> bool """ Return True if the link has a hash and it is allowed. """ if hashes is None or not self.has_hash: return False # Assert non-None so mypy knows self.hash_name and self.hash are str. assert self.hash_name is not None assert self.hash is not None return hashes.is_hash_allowed(self.hash_name, hex_digest=self.hash)