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__init__.py
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__pycache__
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auth.py
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cache.py
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session.py
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xmlrpc.py
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Editing: 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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