Source code for PIL.TarIO

#
# The Python Imaging Library.
# $Id$
#
# read files from within a tar file
#
# History:
# 95-06-18 fl   Created
# 96-05-28 fl   Open files in binary mode
#
# Copyright (c) Secret Labs AB 1997.
# Copyright (c) Fredrik Lundh 1995-96.
#
# See the README file for information on usage and redistribution.
#

import sys
from . import ContainerIO


##
# A file object that provides read access to a given member of a TAR
# file.

[docs]class TarIO(ContainerIO.ContainerIO): def __init__(self, tarfile, file): """ Create file object. :param tarfile: Name of TAR file. :param file: Name of member file. """ self.fh = open(tarfile, "rb") while True: s = self.fh.read(512) if len(s) != 512: raise IOError("unexpected end of tar file") name = s[:100].decode('utf-8') i = name.find('\0') if i == 0: raise IOError("cannot find subfile") if i > 0: name = name[:i] size = int(s[124:135], 8) if file == name: break self.fh.seek((size + 511) & (~511), 1) # Open region ContainerIO.ContainerIO.__init__(self, self.fh, self.fh.tell(), size) # Context manager support def __enter__(self): return self def __exit__(self, *args): self.close() if sys.version_info.major >= 3: def __del__(self): self.close()
[docs] def close(self): self.fh.close()