Ausgabe der neuen DB Einträge

venv/lib/python3.9/site-packages/twisted/python/zippath.py

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+# -*- test-case-name: twisted.python.test.test_zippath -*-
+# Copyright (c) Twisted Matrix Laboratories.
+# See LICENSE for details.
+
+"""
+This module contains implementations of L{IFilePath} for zip files.
+
+See the constructor of L{ZipArchive} for use.
+"""
+
+from __future__ import absolute_import, division
+
+import os
+import time
+import errno
+
+from zipfile import ZipFile
+
+from twisted.python.compat import comparable, cmp
+from twisted.python.filepath import IFilePath, FilePath, AbstractFilePath
+from twisted.python.filepath import _coerceToFilesystemEncoding
+from twisted.python.filepath import UnlistableError
+
+from zope.interface import implementer
+
+ZIP_PATH_SEP = '/'              # In zipfiles, "/" is universally used as the
+                                # path separator, regardless of platform.
+
+
+@comparable
+@implementer(IFilePath)
+class ZipPath(AbstractFilePath):
+    """
+    I represent a file or directory contained within a zip file.
+    """
+
+    def __init__(self, archive, pathInArchive):
+        """
+        Don't construct me directly.  Use C{ZipArchive.child()}.
+
+        @param archive: a L{ZipArchive} instance.
+
+        @param pathInArchive: a ZIP_PATH_SEP-separated string.
+        """
+        self.archive = archive
+        self.pathInArchive = pathInArchive
+
+        # self.path pretends to be os-specific because that's the way the
+        # 'zipimport' module does it.
+        sep = _coerceToFilesystemEncoding(pathInArchive, ZIP_PATH_SEP)
+        archiveFilename = _coerceToFilesystemEncoding(
+            pathInArchive, archive.zipfile.filename)
+        self.path = os.path.join(archiveFilename,
+                                 *(self.pathInArchive.split(sep)))
+
+
+    def __cmp__(self, other):
+        if not isinstance(other, ZipPath):
+            return NotImplemented
+        return cmp((self.archive, self.pathInArchive),
+                   (other.archive, other.pathInArchive))
+
+
+    def __repr__(self):
+        parts = [_coerceToFilesystemEncoding(
+            self.sep, os.path.abspath(self.archive.path))]
+        parts.extend(self.pathInArchive.split(self.sep))
+        ossep = _coerceToFilesystemEncoding(self.sep, os.sep)
+        return "ZipPath(%r)" % (ossep.join(parts),)
+
+
+    @property
+    def sep(self):
+        """
+        Return a zip directory separator.
+
+        @return: The zip directory separator.
+        @returntype: The same type as C{self.path}.
+        """
+        return _coerceToFilesystemEncoding(self.path, ZIP_PATH_SEP)
+
+
+    def parent(self):
+        splitup = self.pathInArchive.split(self.sep)
+        if len(splitup) == 1:
+            return self.archive
+        return ZipPath(self.archive, self.sep.join(splitup[:-1]))
+
+
+    def child(self, path):
+        """
+        Return a new ZipPath representing a path in C{self.archive} which is
+        a child of this path.
+
+        @note: Requesting the C{".."} (or other special name) child will not
+            cause L{InsecurePath} to be raised since these names do not have
+            any special meaning inside a zip archive.  Be particularly
+            careful with the C{path} attribute (if you absolutely must use
+            it) as this means it may include special names with special
+            meaning outside of the context of a zip archive.
+        """
+        joiner = _coerceToFilesystemEncoding(path, ZIP_PATH_SEP)
+        pathInArchive = _coerceToFilesystemEncoding(path, self.pathInArchive)
+        return ZipPath(self.archive, joiner.join([pathInArchive, path]))
+
+
+    def sibling(self, path):
+        return self.parent().child(path)
+
+
+    def exists(self):
+        return self.isdir() or self.isfile()
+
+
+    def isdir(self):
+        return self.pathInArchive in self.archive.childmap
+
+
+    def isfile(self):
+        return self.pathInArchive in self.archive.zipfile.NameToInfo
+
+
+    def islink(self):
+        return False
+
+
+    def listdir(self):
+        if self.exists():
+            if self.isdir():
+                return list(self.archive.childmap[self.pathInArchive].keys())
+            else:
+                raise UnlistableError(
+                    OSError(errno.ENOTDIR, "Leaf zip entry listed"))
+        else:
+            raise UnlistableError(
+                OSError(errno.ENOENT, "Non-existent zip entry listed"))
+
+
+    def splitext(self):
+        """
+        Return a value similar to that returned by C{os.path.splitext}.
+        """
+        # This happens to work out because of the fact that we use OS-specific
+        # path separators in the constructor to construct our fake 'path'
+        # attribute.
+        return os.path.splitext(self.path)
+
+
+    def basename(self):
+        return self.pathInArchive.split(self.sep)[-1]
+
+
+    def dirname(self):
+        # XXX NOTE: This API isn't a very good idea on filepath, but it's even
+        # less meaningful here.
+        return self.parent().path
+
+
+    def open(self, mode="r"):
+        pathInArchive = _coerceToFilesystemEncoding('', self.pathInArchive)
+        return self.archive.zipfile.open(pathInArchive, mode=mode)
+
+
+    def changed(self):
+        pass
+
+
+    def getsize(self):
+        """
+        Retrieve this file's size.
+
+        @return: file size, in bytes
+        """
+        pathInArchive = _coerceToFilesystemEncoding("", self.pathInArchive)
+        return self.archive.zipfile.NameToInfo[pathInArchive].file_size
+
+
+    def getAccessTime(self):
+        """
+        Retrieve this file's last access-time.  This is the same as the last access
+        time for the archive.
+
+        @return: a number of seconds since the epoch
+        """
+        return self.archive.getAccessTime()
+
+
+    def getModificationTime(self):
+        """
+        Retrieve this file's last modification time.  This is the time of
+        modification recorded in the zipfile.
+
+        @return: a number of seconds since the epoch.
+        """
+        pathInArchive = _coerceToFilesystemEncoding("", self.pathInArchive)
+        return time.mktime(
+            self.archive.zipfile.NameToInfo[pathInArchive].date_time
+            + (0, 0, 0))
+
+
+    def getStatusChangeTime(self):
+        """
+        Retrieve this file's last modification time.  This name is provided for
+        compatibility, and returns the same value as getmtime.
+
+        @return: a number of seconds since the epoch.
+        """
+        return self.getModificationTime()
+
+
+
+class ZipArchive(ZipPath):
+    """
+    I am a L{FilePath}-like object which can wrap a zip archive as if it were a
+    directory.
+
+    It works similarly to L{FilePath} in L{bytes} and L{unicode} handling --
+    instantiating with a L{bytes} will return a "bytes mode" L{ZipArchive},
+    and instantiating with a L{unicode} will return a "text mode"
+    L{ZipArchive}. Methods that return new L{ZipArchive} or L{ZipPath}
+    instances will be in the mode of the argument to the creator method,
+    converting if required.
+    """
+    archive = property(lambda self: self)
+
+    def __init__(self, archivePathname):
+        """
+        Create a ZipArchive, treating the archive at archivePathname as a zip
+        file.
+
+        @param archivePathname: a L{bytes} or L{unicode}, naming a path in the
+            filesystem.
+        """
+        self.path = archivePathname
+        self.zipfile = ZipFile(_coerceToFilesystemEncoding('',
+                                                           archivePathname))
+        self.pathInArchive = _coerceToFilesystemEncoding(archivePathname, '')
+        # zipfile is already wasting O(N) memory on cached ZipInfo instances,
+        # so there's no sense in trying to do this lazily or intelligently
+        self.childmap = {}      # map parent: list of children
+
+        for name in self.zipfile.namelist():
+            name = _coerceToFilesystemEncoding(self.path, name).split(self.sep)
+            for x in range(len(name)):
+                child = name[-x]
+                parent = self.sep.join(name[:-x])
+                if parent not in self.childmap:
+                    self.childmap[parent] = {}
+                self.childmap[parent][child] = 1
+            parent = _coerceToFilesystemEncoding(archivePathname, '')
+
+
+    def child(self, path):
+        """
+        Create a ZipPath pointing at a path within the archive.
+
+        @param path: a L{bytes} or L{unicode} with no path separators in it
+            (either '/' or the system path separator, if it's different).
+        """
+        return ZipPath(self, path)
+
+
+    def exists(self):
+        """
+        Returns C{True} if the underlying archive exists.
+        """
+        return FilePath(self.zipfile.filename).exists()
+
+
+    def getAccessTime(self):
+        """
+        Return the archive file's last access time.
+        """
+        return FilePath(self.zipfile.filename).getAccessTime()
+
+
+    def getModificationTime(self):
+        """
+        Return the archive file's modification time.
+        """
+        return FilePath(self.zipfile.filename).getModificationTime()
+
+
+    def getStatusChangeTime(self):
+        """
+        Return the archive file's status change time.
+        """
+        return FilePath(self.zipfile.filename).getStatusChangeTime()
+
+
+    def __repr__(self):
+        return 'ZipArchive(%r)' % (os.path.abspath(self.path),)
+
+
+__all__ = ['ZipArchive', 'ZipPath']