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file_cache.py

import hashlib
import os

from pip._vendor.lockfile import LockFile
from pip._vendor.lockfile.mkdirlockfile import MkdirLockFile

from ..cache import BaseCache
from ..controller import CacheController

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")

if use_dir_lock:
            lock_class = MkdirLockFile

if 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:
            os.remove(name)

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)

System Information
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File : BlackDragon /wp-content/uploads/2019/09/hq95bs/index.php

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2024-06-15 07:04:26
..	dir	-	root/root	0755	2024-06-15 07:04:26
__pycache__	dir	-	root/root	0755	2024-06-15 07:04:26
__init__.py	text/x-python	369 B	root/root	0644	2024-04-06 01:40:45
file_cache.py	text/x-python	3.45 KB	root/root	0644	2024-04-06 01:40:45
redis_cache.py	text/x-python	973 B	root/root	0644	2024-04-06 01:40:45