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legacy_repository.py
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legacy_repository.py
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import cgi
import re
import warnings
from collections import defaultdict
from typing import Generator
from typing import Optional
from typing import Union
import requests
import requests.auth
from cachecontrol import CacheControl
from cachecontrol.caches.file_cache import FileCache
from cachy import CacheManager
from poetry.core.packages import Package
from poetry.core.packages.utils.link import Link
from poetry.core.semver import Version
from poetry.core.semver import VersionConstraint
from poetry.core.semver import VersionRange
from poetry.core.semver import parse_constraint
from poetry.locations import REPOSITORY_CACHE_DIR
from poetry.utils._compat import Path
from poetry.utils.helpers import canonicalize_name
from poetry.utils.patterns import wheel_file_re
from ..config.config import Config
from ..inspection.info import PackageInfo
from ..utils.authenticator import Authenticator
from .exceptions import PackageNotFound
from .exceptions import RepositoryError
from .pypi_repository import PyPiRepository
try:
import urllib.parse as urlparse
except ImportError:
import urlparse
try:
from html import unescape
except ImportError:
try:
from html.parser import HTMLParser
except ImportError:
from HTMLParser import HTMLParser
unescape = HTMLParser().unescape
try:
from urllib.parse import quote
except ImportError:
from urllib import quote
with warnings.catch_warnings():
warnings.simplefilter("ignore")
import html5lib
class Page:
VERSION_REGEX = re.compile(r"(?i)([a-z0-9_\-.]+?)-(?=\d)([a-z0-9_.!+-]+)")
SUPPORTED_FORMATS = [
".tar.gz",
".whl",
".zip",
".tar.bz2",
".tar.xz",
".tar.Z",
".tar",
]
def __init__(self, url, content, headers):
if not url.endswith("/"):
url += "/"
self._url = url
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
if encoding is None:
self._parsed = html5lib.parse(content, namespaceHTMLElements=False)
else:
self._parsed = html5lib.parse(
content, transport_encoding=encoding, namespaceHTMLElements=False
)
@property
def versions(self): # type: () -> Generator[Version]
seen = set()
for link in self.links:
version = self.link_version(link)
if not version:
continue
if version in seen:
continue
seen.add(version)
yield version
@property
def links(self): # type: () -> Generator[Link]
for anchor in self._parsed.findall(".//a"):
if anchor.get("href"):
href = anchor.get("href")
url = self.clean_link(urlparse.urljoin(self._url, href))
pyrequire = anchor.get("data-requires-python")
pyrequire = unescape(pyrequire) if pyrequire else None
link = Link(url, self, requires_python=pyrequire)
if link.ext not in self.SUPPORTED_FORMATS:
continue
yield link
def links_for_version(self, version): # type: (Version) -> Generator[Link]
for link in self.links:
if self.link_version(link) == version:
yield link
def link_version(self, link): # type: (Link) -> Union[Version, None]
m = wheel_file_re.match(link.filename)
if m:
version = m.group("ver")
else:
info, ext = link.splitext()
match = self.VERSION_REGEX.match(info)
if not match:
return
version = match.group(2)
try:
version = Version.parse(version)
except ValueError:
return
return version
_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 LegacyRepository(PyPiRepository):
def __init__(
self, name, url, config=None, disable_cache=False, cert=None, client_cert=None
): # type: (str, str, Optional[Config], bool, Optional[Path], Optional[Path]) -> None
if name == "pypi":
raise ValueError("The name [pypi] is reserved for repositories")
self._packages = []
self._name = name
self._url = url.rstrip("/")
self._client_cert = client_cert
self._cert = cert
self._cache_dir = REPOSITORY_CACHE_DIR / name
self._cache = CacheManager(
{
"default": "releases",
"serializer": "json",
"stores": {
"releases": {"driver": "file", "path": str(self._cache_dir)},
"packages": {"driver": "dict"},
"matches": {"driver": "dict"},
},
}
)
self._authenticator = Authenticator(
config=config or Config(use_environment=True)
)
self._basic_auth = None
username, password = self._authenticator.get_credentials_for_url(self._url)
if username is not None and password is not None:
self._basic_auth = requests.auth.HTTPBasicAuth(username, password)
self._disable_cache = disable_cache
@property
def cert(self): # type: () -> Optional[Path]
return self._cert
@property
def client_cert(self): # type: () -> Optional[Path]
return self._client_cert
@property
def session(self):
session = self._authenticator.session
if self._basic_auth:
session.auth = self._basic_auth
if self._cert:
session.verify = str(self._cert)
if self._client_cert:
session.cert = str(self._client_cert)
return CacheControl(session, cache=FileCache(str(self._cache_dir / "_http")))
@property
def authenticated_url(self): # type: () -> str
if not self._basic_auth:
return self.url
parsed = urlparse.urlparse(self.url)
return "{scheme}://{username}:{password}@{netloc}{path}".format(
scheme=parsed.scheme,
username=quote(self._basic_auth.username, safe=""),
password=quote(self._basic_auth.password, safe=""),
netloc=parsed.netloc,
path=parsed.path,
)
def find_packages(self, dependency):
packages = []
constraint = dependency.constraint
if constraint is None:
constraint = "*"
if not isinstance(constraint, VersionConstraint):
constraint = parse_constraint(constraint)
allow_prereleases = dependency.allows_prereleases()
if isinstance(constraint, VersionRange):
if (
constraint.max is not None
and constraint.max.is_prerelease()
or constraint.min is not None
and constraint.min.is_prerelease()
):
allow_prereleases = True
key = dependency.name
if not constraint.is_any():
key = "{}:{}".format(key, str(constraint))
ignored_pre_release_versions = []
if self._cache.store("matches").has(key):
versions = self._cache.store("matches").get(key)
else:
page = self._get("/{}/".format(dependency.name.replace(".", "-")))
if page is None:
return []
versions = []
for version in page.versions:
if version.is_prerelease() and not allow_prereleases:
if constraint.is_any():
# we need this when all versions of the package are pre-releases
ignored_pre_release_versions.append(version)
continue
if constraint.allows(version):
versions.append(version)
self._cache.store("matches").put(key, versions, 5)
for package_versions in (versions, ignored_pre_release_versions):
for version in package_versions:
package = Package(
dependency.name,
version,
source_type="legacy",
source_reference=self.name,
source_url=self._url,
)
packages.append(package)
self._log(
"{} packages found for {} {}".format(
len(packages), dependency.name, str(constraint)
),
level="debug",
)
if packages or not constraint.is_any():
# we have matching packages, or constraint is not (*)
break
return packages
def package(self, name, version, extras=None): # type: (...) -> Package
"""
Retrieve the release information.
This is a heavy task which takes time.
We have to download a package to get the dependencies.
We also need to download every file matching this release
to get the various hashes.
Note that this will be cached so the subsequent operations
should be much faster.
"""
try:
index = self._packages.index(Package(name, version, version))
return self._packages[index]
except ValueError:
package = super(LegacyRepository, self).package(name, version, extras)
package._source_type = "legacy"
package._source_url = self._url
package._source_reference = self.name
return package
def find_links_for_package(self, package):
page = self._get("/{}/".format(package.name.replace(".", "-")))
if page is None:
return []
return list(page.links_for_version(package.version))
def _get_release_info(self, name, version): # type: (str, str) -> dict
page = self._get("/{}/".format(canonicalize_name(name).replace(".", "-")))
if page is None:
raise PackageNotFound('No package named "{}"'.format(name))
data = PackageInfo(
name=name,
version=version,
summary="",
platform=None,
requires_dist=[],
requires_python=None,
files=[],
cache_version=str(self.CACHE_VERSION),
)
links = list(page.links_for_version(Version.parse(version)))
if not links:
raise PackageNotFound(
'No valid distribution links found for package: "{}" version: "{}"'.format(
name, version
)
)
urls = defaultdict(list)
files = []
for link in links:
if link.is_wheel:
urls["bdist_wheel"].append(link.url)
elif link.filename.endswith(
(".tar.gz", ".zip", ".bz2", ".xz", ".Z", ".tar")
):
urls["sdist"].append(link.url)
h = link.hash
if h:
h = link.hash_name + ":" + link.hash
files.append({"file": link.filename, "hash": h})
data.files = files
info = self._get_info_from_urls(urls)
data.summary = info.summary
data.requires_dist = info.requires_dist
data.requires_python = info.requires_python
return data.asdict()
def _get(self, endpoint): # type: (str) -> Union[Page, None]
url = self._url + endpoint
try:
response = self.session.get(url)
if response.status_code == 404:
return
response.raise_for_status()
except requests.HTTPError as e:
raise RepositoryError(e)
if response.status_code in (401, 403):
self._log(
"Authorization error accessing {url}".format(url=response.url),
level="warn",
)
return
if response.url != url:
self._log(
"Response URL {response_url} differs from request URL {url}".format(
response_url=response.url, url=url
),
level="debug",
)
return Page(response.url, response.content, response.headers)