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File Name : cache.py

"""HTTP cache implementation.
"""

# The following comment should be removed at some point in the future.
# mypy: disallow-untyped-defs=False

import os
from contextlib import contextmanager

from pip._vendor.cachecontrol.cache import BaseCache
from pip._vendor.cachecontrol.caches import FileCache

from pip._internal.utils.filesystem import adjacent_tmp_file, replace
from pip._internal.utils.misc import ensure_dir
from pip._internal.utils.typing import MYPY_CHECK_RUNNING

if MYPY_CHECK_RUNNING:
    from typing import Optional

@contextmanager
def suppressed_cache_errors():
    """If we can't access the cache then we can just skip caching and process
    requests as if caching wasn't enabled.
    """
    try:
        yield
    except (OSError, IOError):
        pass

class SafeFileCache(BaseCache):
    """
    A file based cache which is safe to use even when the target directory may
    not be accessible or writable.
    """

def __init__(self, directory):
        # type: (str) -> None
        assert directory is not None, "Cache directory must not be None."
        super(SafeFileCache, self).__init__()
        self.directory = directory

def _get_cache_path(self, name):
        # type: (str) -> str
        # 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)
        parts = list(hashed[:5]) + [hashed]
        return os.path.join(self.directory, *parts)

def get(self, key):
        # type: (str) -> Optional[bytes]
        path = self._get_cache_path(key)
        with suppressed_cache_errors():
            with open(path, 'rb') as f:
                return f.read()

def set(self, key, value):
        # type: (str, bytes) -> None
        path = self._get_cache_path(key)
        with suppressed_cache_errors():
            ensure_dir(os.path.dirname(path))

with adjacent_tmp_file(path) as f:
                f.write(value)

replace(f.name, path)

def delete(self, key):
        # type: (str) -> None
        path = self._get_cache_path(key)
        with suppressed_cache_errors():
            os.remove(path)

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Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2024-03-06 11:05:10
..	dir	-	root/root	0755	2024-03-06 11:05:10
__pycache__	dir	-	root/root	0755	2024-03-06 11:05:10
__init__.py	text/plain	50 B	root/root	0644	2023-10-17 06:30:24
auth.py	text/plain	10.86 KB	root/root	0644	2023-10-17 06:30:24
cache.py	text/plain	2.18 KB	root/root	0644	2023-10-17 06:30:24
session.py	text/plain	15.47 KB	root/root	0644	2023-10-17 06:30:24
xmlrpc.py	text/plain	1.56 KB	root/root	0644	2023-10-17 06:30:24