File size: 4,678 Bytes
d94b56e | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 | # -*- coding: utf-8 -*-
#
# pyhwp : hwp file format parser in python
# Copyright (C) 2010-2023 mete0r <https://github.com/mete0r>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
from __future__ import absolute_import
from __future__ import print_function
from __future__ import unicode_literals
from ..errors import InvalidOleStorageError
from ..utils import cached_property
def is_enabled():
try:
import olefile # noqa
except Exception:
pass
else:
return True
try:
import OleFileIO_PL # noqa
except ImportError:
pass
else:
return True
return False
def import_isOleFile():
try:
from olefile import isOleFile
except ImportError:
pass
else:
return isOleFile
try:
from OleFileIO_PL import isOleFile
except ImportError:
pass
else:
return isOleFile
def import_OleFileIO():
try:
from olefile import OleFileIO
except ImportError:
pass
else:
return OleFileIO
try:
from OleFileIO_PL import OleFileIO
except ImportError:
pass
else:
return OleFileIO
class OleStorageItem(object):
def __init__(self, olefile, path, parent=None):
self.olefile = olefile
self.path = path # path DOES NOT end with '/'
def get_name(self):
if self.path == '':
return None
segments = self.path.split('/')
return segments[-1]
name = cached_property(get_name)
class OleStream(OleStorageItem):
def open(self):
return self.olefile.openstream(self.path)
class OleStorage(OleStorageItem):
''' Create an OleStorage instance.
:param olefile: an OLE2 Compound Binary File.
:type olefile: an OleFileIO instance or an argument to OleFileIO()
:param path: internal path in the olefile. Should not end with '/'.
:raises: `InvalidOleStorageError` when `olefile` is not valid OLE2 format.
'''
def __init__(self, olefile, path='', parent=None):
if not hasattr(olefile, 'openstream'):
isOleFile = import_isOleFile()
OleFileIO = import_OleFileIO()
if not isOleFile(olefile):
errormsg = 'Not an OLE2 Compound Binary File.'
raise InvalidOleStorageError(errormsg)
olefile = OleFileIO(olefile)
OleStorageItem.__init__(self, olefile, path, parent)
def __iter__(self):
return olefile_listdir(self.olefile, self.path)
def __getitem__(self, name):
if self.path == '' or self.path == '/':
path = name
else:
path = self.path + '/' + name
if not self.olefile.exists(path):
raise KeyError('%s not found' % path)
t = self.olefile.get_type(path)
if t == 1: # Storage
return OleStorage(self.olefile, path, self)
elif t == 2: # Stream
return OleStream(self.olefile, path, self)
else:
raise KeyError('%s is invalid' % path)
def close(self):
# if this is root, close underlying olefile
if self.path == '':
# old version of OleFileIO has no close()
if hasattr(self.olefile, 'close'):
self.olefile.close()
def olefile_listdir(olefile, path):
if path == '' or path == '/':
# we use a list instead of a set
# for python 2.3 compatibility
yielded = []
for stream in olefile.listdir():
top_item = stream[0]
if top_item in yielded:
continue
yielded.append(top_item)
yield top_item
return
if not olefile.exists(path):
raise IOError('%s not exists' % path)
if olefile.get_type(path) != 1:
raise IOError('%s not a storage' % path)
path_segments = path.split('/')
for stream in olefile.listdir():
if len(stream) == len(path_segments) + 1:
if stream[:-1] == path_segments:
yield stream[-1]
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