mirror of
https://github.com/janeczku/calibre-web
synced 2024-11-01 15:46:21 +00:00
75 lines
2.3 KiB
Python
75 lines
2.3 KiB
Python
# -*- coding: utf-8 -*-
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# This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
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# Copyright (C) 2023 OzzieIsaacs
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from tempfile import gettempdir
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import os
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import shutil
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import zipfile
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import mimetypes
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from io import BytesIO
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from . import logger
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log = logger.create()
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try:
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import magic
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error = None
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except ImportError as e:
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error = "Cannot import python-magic, checking uploaded file metadata will not work: {}".format(e)
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def get_temp_dir():
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tmp_dir = os.path.join(gettempdir(), 'calibre_web')
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if not os.path.isdir(tmp_dir):
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os.mkdir(tmp_dir)
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return tmp_dir
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def del_temp_dir():
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tmp_dir = os.path.join(gettempdir(), 'calibre_web')
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shutil.rmtree(tmp_dir)
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def validate_mime_type(file_buffer, allowed_extensions):
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if error:
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log.error(error)
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return False
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mime = magic.Magic(mime=True)
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allowed_mimetypes = list()
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for x in allowed_extensions:
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try:
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allowed_mimetypes.append(mimetypes.types_map["." + x])
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except KeyError:
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log.error("Unkown mimetype for Extension: {}".format(x))
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tmp_mime_type = mime.from_buffer(file_buffer.read())
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file_buffer.seek(0)
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if any(mime_type in tmp_mime_type for mime_type in allowed_mimetypes):
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return True
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# Some epubs show up as zip mimetypes
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elif "zip" in tmp_mime_type:
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try:
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with zipfile.ZipFile(BytesIO(file_buffer.read()), 'r') as epub:
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file_buffer.seek(0)
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if "mimetype" in epub.namelist():
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return True
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except:
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file_buffer.seek(0)
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log.error("Mimetype '{}' not found in allowed types".format(tmp_mime_type))
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return False
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