Воркед

venv/Lib/site-packages/pip/_internal/network/auth.py

@@ -4,8 +4,18 @@ Contains interface (MultiDomainBasicAuth) and associated glue code for
 providing credentials in the context of network requests.
 """
 
+import logging
+import os
+import shutil
+import subprocess
+import sysconfig
+import typing
 import urllib.parse
-from typing import Any, Dict, List, Optional, Tuple
+from abc import ABC, abstractmethod
+from functools import lru_cache
+from os.path import commonprefix
+from pathlib import Path
+from typing import Any, Dict, List, NamedTuple, Optional, Tuple
 
 from pip._vendor.requests.auth import AuthBase, HTTPBasicAuth
 from pip._vendor.requests.models import Request, Response
@@ -23,59 +33,204 @@ from pip._internal.vcs.versioncontrol import AuthInfo
 
 logger = getLogger(__name__)
 
-Credentials = Tuple[str, str, str]
-
-try:
-    import keyring
-except ImportError:
-    keyring = None  # type: ignore[assignment]
-except Exception as exc:
-    logger.warning(
-        "Keyring is skipped due to an exception: %s",
-        str(exc),
-    )
-    keyring = None  # type: ignore[assignment]
+KEYRING_DISABLED = False
 
 
-def get_keyring_auth(url: Optional[str], username: Optional[str]) -> Optional[AuthInfo]:
-    """Return the tuple auth for a given url from keyring."""
-    global keyring
-    if not url or not keyring:
+class Credentials(NamedTuple):
+    url: str
+    username: str
+    password: str
+
+
+class KeyRingBaseProvider(ABC):
+    """Keyring base provider interface"""
+
+    has_keyring: bool
+
+    @abstractmethod
+    def get_auth_info(
+        self, url: str, username: Optional[str]
+    ) -> Optional[AuthInfo]: ...
+
+    @abstractmethod
+    def save_auth_info(self, url: str, username: str, password: str) -> None: ...
+
+
+class KeyRingNullProvider(KeyRingBaseProvider):
+    """Keyring null provider"""
+
+    has_keyring = False
+
+    def get_auth_info(self, url: str, username: Optional[str]) -> Optional[AuthInfo]:
         return None
 
-    try:
-        try:
-            get_credential = keyring.get_credential
-        except AttributeError:
-            pass
-        else:
+    def save_auth_info(self, url: str, username: str, password: str) -> None:
+        return None
+
+
+class KeyRingPythonProvider(KeyRingBaseProvider):
+    """Keyring interface which uses locally imported `keyring`"""
+
+    has_keyring = True
+
+    def __init__(self) -> None:
+        import keyring
+
+        self.keyring = keyring
+
+    def get_auth_info(self, url: str, username: Optional[str]) -> Optional[AuthInfo]:
+        # Support keyring's get_credential interface which supports getting
+        # credentials without a username. This is only available for
+        # keyring>=15.2.0.
+        if hasattr(self.keyring, "get_credential"):
             logger.debug("Getting credentials from keyring for %s", url)
-            cred = get_credential(url, username)
+            cred = self.keyring.get_credential(url, username)
             if cred is not None:
                 return cred.username, cred.password
             return None
 
-        if username:
+        if username is not None:
             logger.debug("Getting password from keyring for %s", url)
-            password = keyring.get_password(url, username)
+            password = self.keyring.get_password(url, username)
             if password:
                 return username, password
+        return None
 
-    except Exception as exc:
-        logger.warning(
-            "Keyring is skipped due to an exception: %s",
-            str(exc),
+    def save_auth_info(self, url: str, username: str, password: str) -> None:
+        self.keyring.set_password(url, username, password)
+
+
+class KeyRingCliProvider(KeyRingBaseProvider):
+    """Provider which uses `keyring` cli
+
+    Instead of calling the keyring package installed alongside pip
+    we call keyring on the command line which will enable pip to
+    use which ever installation of keyring is available first in
+    PATH.
+    """
+
+    has_keyring = True
+
+    def __init__(self, cmd: str) -> None:
+        self.keyring = cmd
+
+    def get_auth_info(self, url: str, username: Optional[str]) -> Optional[AuthInfo]:
+        # This is the default implementation of keyring.get_credential
+        # https://github.com/jaraco/keyring/blob/97689324abcf01bd1793d49063e7ca01e03d7d07/keyring/backend.py#L134-L139
+        if username is not None:
+            password = self._get_password(url, username)
+            if password is not None:
+                return username, password
+        return None
+
+    def save_auth_info(self, url: str, username: str, password: str) -> None:
+        return self._set_password(url, username, password)
+
+    def _get_password(self, service_name: str, username: str) -> Optional[str]:
+        """Mirror the implementation of keyring.get_password using cli"""
+        if self.keyring is None:
+            return None
+
+        cmd = [self.keyring, "get", service_name, username]
+        env = os.environ.copy()
+        env["PYTHONIOENCODING"] = "utf-8"
+        res = subprocess.run(
+            cmd,
+            stdin=subprocess.DEVNULL,
+            stdout=subprocess.PIPE,
+            env=env,
         )
-        keyring = None  # type: ignore[assignment]
-    return None
+        if res.returncode:
+            return None
+        return res.stdout.decode("utf-8").strip(os.linesep)
+
+    def _set_password(self, service_name: str, username: str, password: str) -> None:
+        """Mirror the implementation of keyring.set_password using cli"""
+        if self.keyring is None:
+            return None
+        env = os.environ.copy()
+        env["PYTHONIOENCODING"] = "utf-8"
+        subprocess.run(
+            [self.keyring, "set", service_name, username],
+            input=f"{password}{os.linesep}".encode(),
+            env=env,
+            check=True,
+        )
+        return None
+
+
+@lru_cache(maxsize=None)
+def get_keyring_provider(provider: str) -> KeyRingBaseProvider:
+    logger.verbose("Keyring provider requested: %s", provider)
+
+    # keyring has previously failed and been disabled
+    if KEYRING_DISABLED:
+        provider = "disabled"
+    if provider in ["import", "auto"]:
+        try:
+            impl = KeyRingPythonProvider()
+            logger.verbose("Keyring provider set: import")
+            return impl
+        except ImportError:
+            pass
+        except Exception as exc:
+            # In the event of an unexpected exception
+            # we should warn the user
+            msg = "Installed copy of keyring fails with exception %s"
+            if provider == "auto":
+                msg = msg + ", trying to find a keyring executable as a fallback"
+            logger.warning(msg, exc, exc_info=logger.isEnabledFor(logging.DEBUG))
+    if provider in ["subprocess", "auto"]:
+        cli = shutil.which("keyring")
+        if cli and cli.startswith(sysconfig.get_path("scripts")):
+            # all code within this function is stolen from shutil.which implementation
+            @typing.no_type_check
+            def PATH_as_shutil_which_determines_it() -> str:
+                path = os.environ.get("PATH", None)
+                if path is None:
+                    try:
+                        path = os.confstr("CS_PATH")
+                    except (AttributeError, ValueError):
+                        # os.confstr() or CS_PATH is not available
+                        path = os.defpath
+                # bpo-35755: Don't use os.defpath if the PATH environment variable is
+                # set to an empty string
+
+                return path
+
+            scripts = Path(sysconfig.get_path("scripts"))
+
+            paths = []
+            for path in PATH_as_shutil_which_determines_it().split(os.pathsep):
+                p = Path(path)
+                try:
+                    if not p.samefile(scripts):
+                        paths.append(path)
+                except FileNotFoundError:
+                    pass
+
+            path = os.pathsep.join(paths)
+
+            cli = shutil.which("keyring", path=path)
+
+        if cli:
+            logger.verbose("Keyring provider set: subprocess with executable %s", cli)
+            return KeyRingCliProvider(cli)
+
+    logger.verbose("Keyring provider set: disabled")
+    return KeyRingNullProvider()
 
 
 class MultiDomainBasicAuth(AuthBase):
     def __init__(
-        self, prompting: bool = True, index_urls: Optional[List[str]] = None
+        self,
+        prompting: bool = True,
+        index_urls: Optional[List[str]] = None,
+        keyring_provider: str = "auto",
     ) -> None:
         self.prompting = prompting
         self.index_urls = index_urls
+        self.keyring_provider = keyring_provider  # type: ignore[assignment]
         self.passwords: Dict[str, AuthInfo] = {}
         # When the user is prompted to enter credentials and keyring is
         # available, we will offer to save them. If the user accepts,
@@ -84,6 +239,51 @@ class MultiDomainBasicAuth(AuthBase):
         # ``save_credentials`` to save these.
         self._credentials_to_save: Optional[Credentials] = None
 
+    @property
+    def keyring_provider(self) -> KeyRingBaseProvider:
+        return get_keyring_provider(self._keyring_provider)
+
+    @keyring_provider.setter
+    def keyring_provider(self, provider: str) -> None:
+        # The free function get_keyring_provider has been decorated with
+        # functools.cache. If an exception occurs in get_keyring_auth that
+        # cache will be cleared and keyring disabled, take that into account
+        # if you want to remove this indirection.
+        self._keyring_provider = provider
+
+    @property
+    def use_keyring(self) -> bool:
+        # We won't use keyring when --no-input is passed unless
+        # a specific provider is requested because it might require
+        # user interaction
+        return self.prompting or self._keyring_provider not in ["auto", "disabled"]
+
+    def _get_keyring_auth(
+        self,
+        url: Optional[str],
+        username: Optional[str],
+    ) -> Optional[AuthInfo]:
+        """Return the tuple auth for a given url from keyring."""
+        # Do nothing if no url was provided
+        if not url:
+            return None
+
+        try:
+            return self.keyring_provider.get_auth_info(url, username)
+        except Exception as exc:
+            # Log the full exception (with stacktrace) at debug, so it'll only
+            # show up when running in verbose mode.
+            logger.debug("Keyring is skipped due to an exception", exc_info=True)
+            # Always log a shortened version of the exception.
+            logger.warning(
+                "Keyring is skipped due to an exception: %s",
+                str(exc),
+            )
+            global KEYRING_DISABLED
+            KEYRING_DISABLED = True
+            get_keyring_provider.cache_clear()
+            return None
+
     def _get_index_url(self, url: str) -> Optional[str]:
         """Return the original index URL matching the requested URL.
 
@@ -100,15 +300,42 @@ class MultiDomainBasicAuth(AuthBase):
         if not url or not self.index_urls:
             return None
 
-        for u in self.index_urls:
-            prefix = remove_auth_from_url(u).rstrip("/") + "/"
-            if url.startswith(prefix):
-                return u
-        return None
+        url = remove_auth_from_url(url).rstrip("/") + "/"
+        parsed_url = urllib.parse.urlsplit(url)
+
+        candidates = []
+
+        for index in self.index_urls:
+            index = index.rstrip("/") + "/"
+            parsed_index = urllib.parse.urlsplit(remove_auth_from_url(index))
+            if parsed_url == parsed_index:
+                return index
+
+            if parsed_url.netloc != parsed_index.netloc:
+                continue
+
+            candidate = urllib.parse.urlsplit(index)
+            candidates.append(candidate)
+
+        if not candidates:
+            return None
+
+        candidates.sort(
+            reverse=True,
+            key=lambda candidate: commonprefix(
+                [
+                    parsed_url.path,
+                    candidate.path,
+                ]
+            ).rfind("/"),
+        )
+
+        return urllib.parse.urlunsplit(candidates[0])
 
     def _get_new_credentials(
         self,
         original_url: str,
+        *,
         allow_netrc: bool = True,
         allow_keyring: bool = False,
     ) -> AuthInfo:
@@ -152,8 +379,8 @@ class MultiDomainBasicAuth(AuthBase):
             # The index url is more specific than the netloc, so try it first
             # fmt: off
             kr_auth = (
-                get_keyring_auth(index_url, username) or
-                get_keyring_auth(netloc, username)
+                self._get_keyring_auth(index_url, username) or
+                self._get_keyring_auth(netloc, username)
             )
             # fmt: on
             if kr_auth:
@@ -230,18 +457,23 @@ class MultiDomainBasicAuth(AuthBase):
     def _prompt_for_password(
         self, netloc: str
     ) -> Tuple[Optional[str], Optional[str], bool]:
-        username = ask_input(f"User for {netloc}: ")
+        username = ask_input(f"User for {netloc}: ") if self.prompting else None
         if not username:
             return None, None, False
-        auth = get_keyring_auth(netloc, username)
-        if auth and auth[0] is not None and auth[1] is not None:
-            return auth[0], auth[1], False
+        if self.use_keyring:
+            auth = self._get_keyring_auth(netloc, username)
+            if auth and auth[0] is not None and auth[1] is not None:
+                return auth[0], auth[1], False
         password = ask_password("Password: ")
         return username, password, True
 
     # Factored out to allow for easy patching in tests
     def _should_save_password_to_keyring(self) -> bool:
-        if not keyring:
+        if (
+            not self.prompting
+            or not self.use_keyring
+            or not self.keyring_provider.has_keyring
+        ):
             return False
         return ask("Save credentials to keyring [y/N]: ", ["y", "n"]) == "y"
 
@@ -251,19 +483,22 @@ class MultiDomainBasicAuth(AuthBase):
         if resp.status_code != 401:
             return resp
 
+        username, password = None, None
+
+        # Query the keyring for credentials:
+        if self.use_keyring:
+            username, password = self._get_new_credentials(
+                resp.url,
+                allow_netrc=False,
+                allow_keyring=True,
+            )
+
         # We are not able to prompt the user so simply return the response
-        if not self.prompting:
+        if not self.prompting and not username and not password:
             return resp
 
         parsed = urllib.parse.urlparse(resp.url)
 
-        # Query the keyring for credentials:
-        username, password = self._get_new_credentials(
-            resp.url,
-            allow_netrc=False,
-            allow_keyring=True,
-        )
-
         # Prompt the user for a new username and password
         save = False
         if not username and not password:
@@ -276,11 +511,17 @@ class MultiDomainBasicAuth(AuthBase):
 
             # Prompt to save the password to keyring
             if save and self._should_save_password_to_keyring():
-                self._credentials_to_save = (parsed.netloc, username, password)
+                self._credentials_to_save = Credentials(
+                    url=parsed.netloc,
+                    username=username,
+                    password=password,
+                )
 
         # Consume content and release the original connection to allow our new
         #   request to reuse the same one.
-        resp.content
+        # The result of the assignment isn't used, it's just needed to consume
+        # the content.
+        _ = resp.content
         resp.raw.release_conn()
 
         # Add our new username and password to the request
@@ -309,15 +550,17 @@ class MultiDomainBasicAuth(AuthBase):
 
     def save_credentials(self, resp: Response, **kwargs: Any) -> None:
         """Response callback to save credentials on success."""
-        assert keyring is not None, "should never reach here without keyring"
-        if not keyring:
-            return
+        assert (
+            self.keyring_provider.has_keyring
+        ), "should never reach here without keyring"
 
         creds = self._credentials_to_save
         self._credentials_to_save = None
         if creds and resp.status_code < 400:
             try:
                 logger.info("Saving credentials to keyring")
-                keyring.set_password(*creds)
+                self.keyring_provider.save_auth_info(
+                    creds.url, creds.username, creds.password
+                )
             except Exception:
                 logger.exception("Failed to save credentials")

venv/Lib/site-packages/pip/_internal/network/cache.py

@@ -3,10 +3,11 @@
 
 import os
 from contextlib import contextmanager
-from typing import Generator, Optional
+from datetime import datetime
+from typing import BinaryIO, Generator, Optional, Union
 
-from pip._vendor.cachecontrol.cache import BaseCache
-from pip._vendor.cachecontrol.caches import FileCache
+from pip._vendor.cachecontrol.cache import SeparateBodyBaseCache
+from pip._vendor.cachecontrol.caches import SeparateBodyFileCache
 from pip._vendor.requests.models import Response
 
 from pip._internal.utils.filesystem import adjacent_tmp_file, replace
@@ -28,10 +29,22 @@ def suppressed_cache_errors() -> Generator[None, None, None]:
         pass
 
 
-class SafeFileCache(BaseCache):
+class SafeFileCache(SeparateBodyBaseCache):
     """
     A file based cache which is safe to use even when the target directory may
     not be accessible or writable.
+
+    There is a race condition when two processes try to write and/or read the
+    same entry at the same time, since each entry consists of two separate
+    files (https://github.com/psf/cachecontrol/issues/324).  We therefore have
+    additional logic that makes sure that both files to be present before
+    returning an entry; this fixes the read side of the race condition.
+
+    For the write side, we assume that the server will only ever return the
+    same data for the same URL, which ought to be the case for files pip is
+    downloading.  PyPI does not have a mechanism to swap out a wheel for
+    another wheel, for example.  If this assumption is not true, the
+    CacheControl issue will need to be fixed.
     """
 
     def __init__(self, directory: str) -> None:
@@ -43,27 +56,63 @@ class SafeFileCache(BaseCache):
         # From cachecontrol.caches.file_cache.FileCache._fn, brought into our
         # class for backwards-compatibility and to avoid using a non-public
         # method.
-        hashed = FileCache.encode(name)
+        hashed = SeparateBodyFileCache.encode(name)
         parts = list(hashed[:5]) + [hashed]
         return os.path.join(self.directory, *parts)
 
     def get(self, key: str) -> Optional[bytes]:
-        path = self._get_cache_path(key)
+        # The cache entry is only valid if both metadata and body exist.
+        metadata_path = self._get_cache_path(key)
+        body_path = metadata_path + ".body"
+        if not (os.path.exists(metadata_path) and os.path.exists(body_path)):
+            return None
         with suppressed_cache_errors():
-            with open(path, "rb") as f:
+            with open(metadata_path, "rb") as f:
                 return f.read()
 
-    def set(self, key: str, value: bytes, expires: Optional[int] = None) -> None:
-        path = self._get_cache_path(key)
+    def _write(self, path: str, data: bytes) -> None:
         with suppressed_cache_errors():
             ensure_dir(os.path.dirname(path))
 
             with adjacent_tmp_file(path) as f:
-                f.write(value)
+                f.write(data)
+                # Inherit the read/write permissions of the cache directory
+                # to enable multi-user cache use-cases.
+                mode = (
+                    os.stat(self.directory).st_mode
+                    & 0o666  # select read/write permissions of cache directory
+                    | 0o600  # set owner read/write permissions
+                )
+                # Change permissions only if there is no risk of following a symlink.
+                if os.chmod in os.supports_fd:
+                    os.chmod(f.fileno(), mode)
+                elif os.chmod in os.supports_follow_symlinks:
+                    os.chmod(f.name, mode, follow_symlinks=False)
 
             replace(f.name, path)
 
+    def set(
+        self, key: str, value: bytes, expires: Union[int, datetime, None] = None
+    ) -> None:
+        path = self._get_cache_path(key)
+        self._write(path, value)
+
     def delete(self, key: str) -> None:
         path = self._get_cache_path(key)
         with suppressed_cache_errors():
             os.remove(path)
+        with suppressed_cache_errors():
+            os.remove(path + ".body")
+
+    def get_body(self, key: str) -> Optional[BinaryIO]:
+        # The cache entry is only valid if both metadata and body exist.
+        metadata_path = self._get_cache_path(key)
+        body_path = metadata_path + ".body"
+        if not (os.path.exists(metadata_path) and os.path.exists(body_path)):
+            return None
+        with suppressed_cache_errors():
+            return open(body_path, "rb")
+
+    def set_body(self, key: str, body: bytes) -> None:
+        path = self._get_cache_path(key) + ".body"
+        self._write(path, body)

venv/Lib/site-packages/pip/_internal/network/download.py

@@ -1,12 +1,13 @@
 """Download files with progress indicators.
 """
+
 import email.message
 import logging
 import mimetypes
 import os
 from typing import Iterable, Optional, Tuple
 
-from pip._vendor.requests.models import CONTENT_CHUNK_SIZE, Response
+from pip._vendor.requests.models import Response
 
 from pip._internal.cli.progress_bars import get_download_progress_renderer
 from pip._internal.exceptions import NetworkConnectionError
@@ -42,7 +43,7 @@ def _prepare_download(
     logged_url = redact_auth_from_url(url)
 
     if total_length:
-        logged_url = "{} ({})".format(logged_url, format_size(total_length))
+        logged_url = f"{logged_url} ({format_size(total_length)})"
 
     if is_from_cache(resp):
         logger.info("Using cached %s", logged_url)
@@ -55,12 +56,12 @@ def _prepare_download(
         show_progress = False
     elif not total_length:
         show_progress = True
-    elif total_length > (40 * 1000):
+    elif total_length > (512 * 1024):
         show_progress = True
     else:
         show_progress = False
 
-    chunks = response_chunks(resp, CONTENT_CHUNK_SIZE)
+    chunks = response_chunks(resp)
 
     if not show_progress:
         return chunks

venv/Lib/site-packages/pip/_internal/network/lazy_wheel.py

@@ -6,7 +6,7 @@ from bisect import bisect_left, bisect_right
 from contextlib import contextmanager
 from tempfile import NamedTemporaryFile
 from typing import Any, Dict, Generator, List, Optional, Tuple
-from zipfile import BadZipfile, ZipFile
+from zipfile import BadZipFile, ZipFile
 
 from pip._vendor.packaging.utils import canonicalize_name
 from pip._vendor.requests.models import CONTENT_CHUNK_SIZE, Response
@@ -23,7 +23,7 @@ class HTTPRangeRequestUnsupported(Exception):
 def dist_from_wheel_url(name: str, url: str, session: PipSession) -> BaseDistribution:
     """Return a distribution object from the given wheel URL.
 
-    This uses HTTP range requests to only fetch the potion of the wheel
+    This uses HTTP range requests to only fetch the portion of the wheel
     containing metadata, just enough for the object to be constructed.
     If such requests are not supported, HTTPRangeRequestUnsupported
     is raised.
@@ -159,8 +159,8 @@ class LazyZipOverHTTP:
                 try:
                     # For read-only ZIP files, ZipFile only needs
                     # methods read, seek, seekable and tell.
-                    ZipFile(self)  # type: ignore
-                except BadZipfile:
+                    ZipFile(self)
+                except BadZipFile:
                     pass
                 else:
                     break

venv/Lib/site-packages/pip/_internal/network/session.py

@@ -3,6 +3,7 @@ network request configuration and behavior.
 """
 
 import email.utils
+import functools
 import io
 import ipaddress
 import json
@@ -106,6 +107,7 @@ def looks_like_ci() -> bool:
     return any(name in os.environ for name in CI_ENVIRONMENT_VARIABLES)
 
 
+@functools.lru_cache(maxsize=1)
 def user_agent() -> str:
     """
     Return a string representing the user agent.
@@ -230,7 +232,7 @@ class LocalFSAdapter(BaseAdapter):
             # to return a better error message:
             resp.status_code = 404
             resp.reason = type(exc).__name__
-            resp.raw = io.BytesIO(f"{resp.reason}: {exc}".encode("utf8"))
+            resp.raw = io.BytesIO(f"{resp.reason}: {exc}".encode())
         else:
             modified = email.utils.formatdate(stats.st_mtime, usegmt=True)
             content_type = mimetypes.guess_type(pathname)[0] or "text/plain"
@@ -316,7 +318,6 @@ class InsecureCacheControlAdapter(CacheControlAdapter):
 
 
 class PipSession(requests.Session):
-
     timeout: Optional[int] = None
 
     def __init__(
@@ -338,6 +339,7 @@ class PipSession(requests.Session):
         # Namespace the attribute with "pip_" just in case to prevent
         # possible conflicts with the base class.
         self.pip_trusted_origins: List[Tuple[str, Optional[int]]] = []
+        self.pip_proxy = None
 
         # Attach our User Agent to the request
         self.headers["User-Agent"] = user_agent()
@@ -356,8 +358,9 @@ class PipSession(requests.Session):
             # is typically considered a transient error so we'll go ahead and
             # retry it.
             # A 500 may indicate transient error in Amazon S3
+            # A 502 may be a transient error from a CDN like CloudFlare or CloudFront
             # A 520 or 527 - may indicate transient error in CloudFlare
-            status_forcelist=[500, 503, 520, 527],
+            status_forcelist=[500, 502, 503, 520, 527],
             # Add a small amount of back off between failed requests in
             # order to prevent hammering the service.
             backoff_factor=0.25,
@@ -420,15 +423,17 @@ class PipSession(requests.Session):
                 msg += f" (from {source})"
             logger.info(msg)
 
-        host_port = parse_netloc(host)
-        if host_port not in self.pip_trusted_origins:
-            self.pip_trusted_origins.append(host_port)
+        parsed_host, parsed_port = parse_netloc(host)
+        if parsed_host is None:
+            raise ValueError(f"Trusted host URL must include a host part: {host!r}")
+        if (parsed_host, parsed_port) not in self.pip_trusted_origins:
+            self.pip_trusted_origins.append((parsed_host, parsed_port))
 
         self.mount(
             build_url_from_netloc(host, scheme="http") + "/", self._trusted_host_adapter
         )
         self.mount(build_url_from_netloc(host) + "/", self._trusted_host_adapter)
-        if not host_port[1]:
+        if not parsed_port:
             self.mount(
                 build_url_from_netloc(host, scheme="http") + ":",
                 self._trusted_host_adapter,

venv/Lib/site-packages/pip/_internal/network/utils.py

@@ -1,6 +1,6 @@
 from typing import Dict, Generator
 
-from pip._vendor.requests.models import CONTENT_CHUNK_SIZE, Response
+from pip._vendor.requests.models import Response
 
 from pip._internal.exceptions import NetworkConnectionError
 
@@ -25,6 +25,8 @@ from pip._internal.exceptions import NetworkConnectionError
 # possible to make this work.
 HEADERS: Dict[str, str] = {"Accept-Encoding": "identity"}
 
+DOWNLOAD_CHUNK_SIZE = 256 * 1024
+
 
 def raise_for_status(resp: Response) -> None:
     http_error_msg = ""
@@ -55,7 +57,7 @@ def raise_for_status(resp: Response) -> None:
 
 
 def response_chunks(
-    response: Response, chunk_size: int = CONTENT_CHUNK_SIZE
+    response: Response, chunk_size: int = DOWNLOAD_CHUNK_SIZE
 ) -> Generator[bytes, None, None]:
     """Given a requests Response, provide the data chunks."""
     try:

venv/Lib/site-packages/pip/_internal/network/xmlrpc.py

@@ -13,6 +13,8 @@ from pip._internal.network.utils import raise_for_status
 if TYPE_CHECKING:
     from xmlrpc.client import _HostType, _Marshallable
 
+    from _typeshed import SizedBuffer
+
 logger = logging.getLogger(__name__)
 
 
@@ -33,7 +35,7 @@ class PipXmlrpcTransport(xmlrpc.client.Transport):
         self,
         host: "_HostType",
         handler: str,
-        request_body: bytes,
+        request_body: "SizedBuffer",
         verbose: bool = False,
     ) -> Tuple["_Marshallable", ...]:
         assert isinstance(host, str)