From 68df54d6629ec019142eb149dd037774f2d11e7c Mon Sep 17 00:00:00 2001
From: Shubham Saini <shubham6405@gmail.com>
Date: Tue, 11 Dec 2018 15:31:23 +0530
Subject: First commit

---
 .../pip/_vendor/cachecontrol/caches/file_cache.py  | 133 +++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/cachecontrol/caches/file_cache.py

(limited to 'venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/cachecontrol/caches/file_cache.py')

diff --git a/venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/cachecontrol/caches/file_cache.py b/venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/cachecontrol/caches/file_cache.py
new file mode 100644
index 0000000..f7eb890
--- /dev/null
+++ b/venv/lib/python3.7/site-packages/pip-10.0.1-py3.7.egg/pip/_vendor/cachecontrol/caches/file_cache.py
@@ -0,0 +1,133 @@
+import hashlib
+import os
+from textwrap import dedent
+
+from ..cache import BaseCache
+from ..controller import CacheController
+
+try:
+    FileNotFoundError
+except NameError:
+    # py2.X
+    FileNotFoundError = OSError
+
+
+def _secure_open_write(filename, fmode):
+    # We only want to write to this file, so open it in write only mode
+    flags = os.O_WRONLY
+
+    # os.O_CREAT | os.O_EXCL will fail if the file already exists, so we only
+    #  will open *new* files.
+    # We specify this because we want to ensure that the mode we pass is the
+    # mode of the file.
+    flags |= os.O_CREAT | os.O_EXCL
+
+    # Do not follow symlinks to prevent someone from making a symlink that
+    # we follow and insecurely open a cache file.
+    if hasattr(os, "O_NOFOLLOW"):
+        flags |= os.O_NOFOLLOW
+
+    # On Windows we'll mark this file as binary
+    if hasattr(os, "O_BINARY"):
+        flags |= os.O_BINARY
+
+    # Before we open our file, we want to delete any existing file that is
+    # there
+    try:
+        os.remove(filename)
+    except (IOError, OSError):
+        # The file must not exist already, so we can just skip ahead to opening
+        pass
+
+    # Open our file, the use of os.O_CREAT | os.O_EXCL will ensure that if a
+    # race condition happens between the os.remove and this line, that an
+    # error will be raised. Because we utilize a lockfile this should only
+    # happen if someone is attempting to attack us.
+    fd = os.open(filename, flags, fmode)
+    try:
+        return os.fdopen(fd, "wb")
+    except:
+        # An error occurred wrapping our FD in a file object
+        os.close(fd)
+        raise
+
+
+class FileCache(BaseCache):
+    def __init__(self, directory, forever=False, filemode=0o0600,
+                 dirmode=0o0700, use_dir_lock=None, lock_class=None):
+
+        if use_dir_lock is not None and lock_class is not None:
+            raise ValueError("Cannot use use_dir_lock and lock_class together")
+
+        try:
+            from pip._vendor.lockfile import LockFile
+            from pip._vendor.lockfile.mkdirlockfile import MkdirLockFile
+        except ImportError:
+            notice = dedent("""
+            NOTE: In order to use the FileCache you must have
+            lockfile installed. You can install it via pip:
+              pip install lockfile
+            """)
+            raise ImportError(notice)
+        else:
+            if use_dir_lock:
+                lock_class = MkdirLockFile
+
+            elif lock_class is None:
+                lock_class = LockFile
+
+        self.directory = directory
+        self.forever = forever
+        self.filemode = filemode
+        self.dirmode = dirmode
+        self.lock_class = lock_class
+
+    @staticmethod
+    def encode(x):
+        return hashlib.sha224(x.encode()).hexdigest()
+
+    def _fn(self, name):
+        # NOTE: This method should not change as some may depend on it.
+        #       See: https://github.com/ionrock/cachecontrol/issues/63
+        hashed = self.encode(name)
+        parts = list(hashed[:5]) + [hashed]
+        return os.path.join(self.directory, *parts)
+
+    def get(self, key):
+        name = self._fn(key)
+        if not os.path.exists(name):
+            return None
+
+        with open(name, 'rb') as fh:
+            return fh.read()
+
+    def set(self, key, value):
+        name = self._fn(key)
+
+        # Make sure the directory exists
+        try:
+            os.makedirs(os.path.dirname(name), self.dirmode)
+        except (IOError, OSError):
+            pass
+
+        with self.lock_class(name) as lock:
+            # Write our actual file
+            with _secure_open_write(lock.path, self.filemode) as fh:
+                fh.write(value)
+
+    def delete(self, key):
+        name = self._fn(key)
+        if not self.forever:
+            try:
+                os.remove(name)
+            except FileNotFoundError:
+                pass
+
+
+def url_to_file_path(url, filecache):
+    """Return the file cache path based on the URL.
+
+    This does not ensure the file exists!
+    """
+    key = CacheController.cache_url(url)
+    return filecache._fn(key)
-- 
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