mirror of
https://github.com/janeczku/calibre-web
synced 2024-11-10 01:13:33 +00:00
75 lines
2.3 KiB
Python
75 lines
2.3 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
# This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
|
|
# Copyright (C) 2023 OzzieIsaacs
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU 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 General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
from tempfile import gettempdir
|
|
import os
|
|
import shutil
|
|
import zipfile
|
|
import mimetypes
|
|
from io import BytesIO
|
|
|
|
from . import logger
|
|
|
|
log = logger.create()
|
|
|
|
try:
|
|
import magic
|
|
error = None
|
|
except ImportError as e:
|
|
error = "Cannot import python-magic, checking uploaded file metadata will not work: {}".format(e)
|
|
|
|
|
|
def get_temp_dir():
|
|
tmp_dir = os.path.join(gettempdir(), 'calibre_web')
|
|
if not os.path.isdir(tmp_dir):
|
|
os.mkdir(tmp_dir)
|
|
return tmp_dir
|
|
|
|
|
|
def del_temp_dir():
|
|
tmp_dir = os.path.join(gettempdir(), 'calibre_web')
|
|
shutil.rmtree(tmp_dir)
|
|
|
|
|
|
def validate_mime_type(file_buffer, allowed_extensions):
|
|
if error:
|
|
log.error(error)
|
|
return False
|
|
mime = magic.Magic(mime=True)
|
|
allowed_mimetypes = list()
|
|
for x in allowed_extensions:
|
|
try:
|
|
allowed_mimetypes.append(mimetypes.types_map["." + x])
|
|
except KeyError:
|
|
log.error("Unkown mimetype for Extension: {}".format(x))
|
|
tmp_mime_type = mime.from_buffer(file_buffer.read())
|
|
file_buffer.seek(0)
|
|
if any(mime_type in tmp_mime_type for mime_type in allowed_mimetypes):
|
|
return True
|
|
# Some epubs show up as zip mimetypes
|
|
elif "zip" in tmp_mime_type:
|
|
try:
|
|
with zipfile.ZipFile(BytesIO(file_buffer.read()), 'r') as epub:
|
|
file_buffer.seek(0)
|
|
if "mimetype" in epub.namelist():
|
|
return True
|
|
except:
|
|
file_buffer.seek(0)
|
|
log.error("Mimetype '{}' not found in allowed types".format(tmp_mime_type))
|
|
return False
|