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# Copyright (c) 2011, SmartFile <btimby@smartfile.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the organization nor the
# names of its contributors may be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import os, time
from libarchive import is_archive, Entry, SeekableArchive
from zipfile import ZIP_STORED, ZIP_DEFLATED
def is_zipfile(filename):
return is_archive(filename, formats=('zip', ))
class ZipEntry(Entry):
def __init__(self, *args, **kwargs):
super(ZipEntry, self).__init__(*args, **kwargs)
def get_filename(self):
return self.pathname
def set_filename(self, value):
self.pathname = value
filename = property(get_filename, set_filename)
def get_file_size(self):
return self.size
def set_file_size(self, value):
assert isinstance(size, (int, long)), 'Please provide size as int or long.'
self.size = value
file_size = property(get_file_size, set_file_size)
def get_date_time(self):
return time.localtime(self.mtime)[0:6]
def set_date_time(self, value):
assert isinstance(value, tuple), 'mtime should be tuple (year, month, day, hour, minute, second).'
assert len(value) == 6, 'mtime should be tuple (year, month, day, hour, minute, second).'
self.mtime = time.mktime(value + (0, 0, 0))
date_time = property(get_date_time, set_date_time)
header_offset = Entry.header_position
def _get_missing(self):
raise NotImplemented()
def _set_missing(self, value):
raise NotImplemented()
compress_type = property(_get_missing, _set_missing)
comment = property(_get_missing, _set_missing)
extra = property(_get_missing, _set_missing)
create_system = property(_get_missing, _set_missing)
create_version = property(_get_missing, _set_missing)
extract_version = property(_get_missing, _set_missing)
reserved = property(_get_missing, _set_missing)
flag_bits = property(_get_missing, _set_missing)
volume = property(_get_missing, _set_missing)
internal_attr = property(_get_missing, _set_missing)
external_attr = property(_get_missing, _set_missing)
CRC = property(_get_missing, _set_missing)
compress_size = property(_get_missing, _set_missing)
class ZipFile(SeekableArchive):
def __init__(self, f, mode='r', compression=ZIP_DEFLATED, allowZip64=False):
super(ZipFile, self).__init__(f, mode=mode, format='zip', entry_class=ZipEntry, encoding='CP437')
if mode == 'w' and compression == ZIP_STORED:
# Disable compression for writing.
_libarchive.archive_write_set_format_option(self.archive._a, "zip", "compression", "store")
self.compression = compression
getinfo = SeekableArchive.getentry
def namelist(self):
return list(self.iterpaths)
def infolist(self):
return list(self)
def open(self, name, mode, pwd=None):
if pwd:
raise NotImplemented('Encryption not supported.')
if mode == 'r':
return self.readstream(name)
else:
return self.writestream(name)
def extract(self, name, path=None, pwd=None):
if pwd:
raise NotImplemented('Encryption not supported.')
if not path:
path = os.getcwd()
return self.readpath(name, os.path.join(path, name))
def extractall(self, path, names=None, pwd=None):
if pwd:
raise NotImplemented('Encryption not supported.')
if not names:
names = self.namelist()
if names:
for name in names:
self.extract(name, path)
def read(self, name, pwd=None):
if pwd:
raise NotImplemented('Encryption not supported.')
return self.read(name)
def writestr(self, member, data, compress_type=None):
if compress_type != self.compression:
raise Exception('Cannot change compression type for individual entries.')
return self.write(member, data)
def setpassword(self, pwd):
raise NotImplemented('Encryption not supported.')
def testzip(self):
raise NotImplemented()
def _get_missing(self):
raise NotImplemented()
def _set_missing(self, value):
raise NotImplemented()
comment = property(_get_missing, _set_missing)
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