End of day commit

#    Simple OPDS - программа для каталогизации электронных книг и организации

#                  доступа к ним с использованием протокола OPDS.

#    Copyright (C)2014, Дмитрий Шелепнёв

#    Copyright (C)2017, Дмитрий Шелепнёв

#

#    Это программа является свободным программным обеспечением. Вы можете

#    распространять и/или модифицировать её согласно условиям Стандартной

The MIT License (MIT)

Copyright (c) 2014 FBReader.ORG Limited

Permission is hereby granted, free of charge, to any person obtaining a copy

of this software and associated documentation files (the "Software"), to deal

in the Software without restriction, including without limitation the rights

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the Software is

furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all

copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

SOFTWARE.

#import magic

import os

import zipfile

from xml import sax

from book_tools.format.mimetype import Mimetype

from book_tools.format.util import list_zip_file_infos

from book_tools.format.epub import EPub

from book_tools.format.fb2 import FB2, FB2Zip

#from fbreader.format.pdf import PDF

#from fbreader.format.msword import MSWord

from book_tools.format.mobi import Mobipocket

#from fbreader.format.rtf import RTF

#from fbreader.format.djvu import DjVu

#from fbreader.format.dummy import Dummy

#__detector = magic.open(magic.MAGIC_MIME_TYPE)

#__detector.load()

class __detector:

    @staticmethod

    def file(filename):

        (n, e) = os.path.splitext(filename)

        if e.lower() == '.fb2':

            return Mimetype.FB2

        elif e.lower()=='.epub' or e.lower()=='.zip':

            return Mimetype.ZIP

        elif e.lower()=='.pdf':

            return Mimetype.PDF

        elif e.lower()=='.doc' or e.lower()=='.docx':

            return Mimetype.MSWORD

        elif e.lower()=='.djvu':

            return Mimetype.DJVU

        elif e.lower()=='.txt':

            return Mimetype.TEXT

        elif e.lower()=='.rtf':

            return Mimetype.RTF

        else:

            return Mimetype.OCTET_STREAM

def detect_mime(file):

    FB2_ROOT = 'FictionBook'

    mime = __detector.file(file.name)

    try:

        if mime == Mimetype.XML or mime == Mimetype.FB2:

            if FB2_ROOT == __xml_root_tag(file):

                return Mimetype.FB2

        elif mime == Mimetype.ZIP:

            with zipfile.ZipFile(file) as zip_file:

                if not zip_file.testzip():

                    infolist = list_zip_file_infos(zip_file)

                    if len(infolist) == 1:

                        if FB2_ROOT == __xml_root_tag(zip_file.open(infolist[0])):

                            return Mimetype.FB2_ZIP

                    try:

                        with zip_file.open('mimetype') as mimetype_file:

                            if mimetype_file.read(30).decode().rstrip('\n\r') == Mimetype.EPUB:

                                return Mimetype.EPUB

                    except Exception as e:

                        pass

        elif mime == Mimetype.OCTET_STREAM:

            mobiflag =  file.read(68)

            if mobiflag.decode()[60:] == 'BOOKMOBI':

                return Mimetype.MOBI

    except:

        pass

    return mime

def create_bookfile(file, original_filename):

    if isinstance(file, str):

        file = open(file, 'rb')

    mimetype = detect_mime(file)

    file.seek(0,0)

    if mimetype == Mimetype.EPUB:

        return EPub(file, original_filename)

    elif mimetype == Mimetype.FB2:

        return FB2(file, original_filename)

    elif mimetype == Mimetype.FB2_ZIP:

        return FB2Zip(file, original_filename)

    elif mimetype == Mimetype.MOBI:

        return Mobipocket(file, original_filename)

#    elif mimetype == Mimetype.PDF:

#        return PDF(path, original_filename)

#    elif mimetype == Mimetype.MSWORD:

#        return MSWord(path, original_filename)

#    elif mimetype == Mimetype.RTF:

#        return RTF(path, original_filename)

#    elif mimetype == Mimetype.DJVU:

#        return DjVu(path, original_filename)

#    elif mimetype in [Mimetype.TEXT]:

#        return Dummy(path, original_filename, mimetype)

    else:

        raise Exception('File type \'%s\' is not supported, sorry' % mimetype)

def __xml_root_tag(file):

    class XMLRootFound(Exception):

        def __init__(self, name):

            self.name = name

    class RootTagFinder(sax.handler.ContentHandler):

        def startElement(self, name, attributes):

            raise XMLRootFound(name)

    try:

        sax.parse(file, RootTagFinder())

    except XMLRootFound as e:

        return e.name

    return None

import gzip, os

#from Crypto.Cipher import AES

from tempfile import mktemp

def encrypt(file_name, key, working_dir):

    '''

    file_name:     full path to file to encrypt

    key:           16 byte string

    working_dir:   directory to create temorary files

    '''

    # tmp_file_name = mktemp(dir=working_dir)

    # with open(file_name, 'rb') as istream:

    #     with gzip.open(tmp_file_name, 'wb') as ostream:

    #         ostream.writelines(istream)

    #

    # init_vector = os.urandom(16)

    #

    # mode = AES.MODE_CBC

    # encryptor = AES.new(key, mode, init_vector)

    #

    # with open(tmp_file_name, 'rb') as istream:

    #     with open(file_name, 'wb') as ostream:

    #         ostream.write(init_vector)

    #         while True:

    #             data = istream.read(8192)

    #             if len(data) == 8192:

    #                 ostream.write(encryptor.encrypt(data))

    #             else:

    #                 pad = 16 - len(data) % 16

    #                 ostream.write(encryptor.encrypt(data + pad * chr(pad)))

    #                 break

    #

    # os.remove(tmp_file_name)

    pass