mirror of
https://github.com/janeczku/calibre-web
synced 2024-11-08 11:00:00 +00:00
298 lines
14 KiB
Python
298 lines
14 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) 2020 pwr
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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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import os
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import re
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from glob import glob
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from shutil import copyfile, copyfileobj
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from markupsafe import escape
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from tempfile import gettempdir
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from time import time
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from sqlalchemy.exc import SQLAlchemyError
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from flask_babel import lazy_gettext as N_
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from cps.services.worker import CalibreTask
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from cps import db
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from cps import logger, config
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from cps.subproc_wrapper import process_open
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from flask_babel import gettext as _
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from cps.kobo_sync_status import remove_synced_book
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from cps.ub import init_db_thread
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from cps.tasks.mail import TaskEmail
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from cps import gdriveutils
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log = logger.create()
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current_milli_time = lambda: int(round(time() * 1000))
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class TaskConvert(CalibreTask):
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def __init__(self, file_path, book_id, task_message, settings, kindle_mail, user=None):
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super(TaskConvert, self).__init__(task_message)
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self.file_path = file_path
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self.book_id = book_id
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self.title = ""
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self.settings = settings
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self.kindle_mail = kindle_mail
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self.user = user
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self.results = dict()
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def run(self, worker_thread):
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self.worker_thread = worker_thread
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if config.config_use_google_drive:
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worker_db = db.CalibreDB(expire_on_commit=False, init=True)
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cur_book = worker_db.get_book(self.book_id)
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self.title = cur_book.title
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data = worker_db.get_book_format(self.book_id, self.settings['old_book_format'])
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df = gdriveutils.getFileFromEbooksFolder(cur_book.path,
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data.name + "." + self.settings['old_book_format'].lower())
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if df:
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datafile = os.path.join(config.config_calibre_dir,
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cur_book.path,
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data.name + u"." + self.settings['old_book_format'].lower())
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if not os.path.exists(os.path.join(config.config_calibre_dir, cur_book.path)):
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os.makedirs(os.path.join(config.config_calibre_dir, cur_book.path))
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df.GetContentFile(datafile)
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worker_db.session.close()
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else:
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error_message = _(u"%(format)s not found on Google Drive: %(fn)s",
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format=self.settings['old_book_format'],
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fn=data.name + "." + self.settings['old_book_format'].lower())
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worker_db.session.close()
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return error_message
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filename = self._convert_ebook_format()
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if config.config_use_google_drive:
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os.remove(self.file_path + u'.' + self.settings['old_book_format'].lower())
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if filename:
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if config.config_use_google_drive:
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# Upload files to gdrive
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gdriveutils.updateGdriveCalibreFromLocal()
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self._handleSuccess()
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if self.kindle_mail:
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# if we're sending to kindle after converting, create a one-off task and run it immediately
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# todo: figure out how to incorporate this into the progress
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try:
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EmailText = N_(u"%(book)s send to Kindle", book=escape(self.title))
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worker_thread.add(self.user, TaskEmail(self.settings['subject'],
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self.results["path"],
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filename,
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self.settings,
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self.kindle_mail,
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EmailText,
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self.settings['body'],
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internal=True)
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)
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except Exception as ex:
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return self._handleError(str(ex))
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def _convert_ebook_format(self):
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error_message = None
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local_db = db.CalibreDB(expire_on_commit=False, init=True)
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file_path = self.file_path
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book_id = self.book_id
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format_old_ext = u'.' + self.settings['old_book_format'].lower()
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format_new_ext = u'.' + self.settings['new_book_format'].lower()
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# check to see if destination format already exists - or if book is in database
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# if it does - mark the conversion task as complete and return a success
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# this will allow send to kindle workflow to continue to work
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if os.path.isfile(file_path + format_new_ext) or\
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local_db.get_book_format(self.book_id, self.settings['new_book_format']):
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log.info("Book id %d already converted to %s", book_id, format_new_ext)
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cur_book = local_db.get_book(book_id)
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self.title = cur_book.title
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self.results['path'] = cur_book.path
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self.results['title'] = self.title
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new_format = local_db.session.query(db.Data).filter(db.Data.book == book_id)\
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.filter(db.Data.format == self.settings['new_book_format'].upper()).one_or_none()
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if not new_format:
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new_format = db.Data(name=os.path.basename(file_path),
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book_format=self.settings['new_book_format'].upper(),
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book=book_id, uncompressed_size=os.path.getsize(file_path + format_new_ext))
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try:
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local_db.session.merge(new_format)
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local_db.session.commit()
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except SQLAlchemyError as e:
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local_db.session.rollback()
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log.error("Database error: %s", e)
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local_db.session.close()
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self._handleError(N_("Database error: %(error)s.", error=e))
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return
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self._handleSuccess()
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local_db.session.close()
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return os.path.basename(file_path + format_new_ext)
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else:
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log.info("Book id %d - target format of %s does not exist. Moving forward with convert.",
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book_id,
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format_new_ext)
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if config.config_kepubifypath and format_old_ext == '.epub' and format_new_ext == '.kepub':
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check, error_message = self._convert_kepubify(file_path,
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format_old_ext,
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format_new_ext)
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else:
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# check if calibre converter-executable is existing
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if not os.path.exists(config.config_converterpath):
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self._handleError(N_(u"Calibre ebook-convert %(tool)s not found", tool=config.config_converterpath))
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return
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check, error_message = self._convert_calibre(file_path, format_old_ext, format_new_ext)
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if check == 0:
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cur_book = local_db.get_book(book_id)
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if os.path.isfile(file_path + format_new_ext):
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new_format = local_db.session.query(db.Data).filter(db.Data.book == book_id) \
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.filter(db.Data.format == self.settings['new_book_format'].upper()).one_or_none()
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if not new_format:
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new_format = db.Data(name=cur_book.data[0].name,
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book_format=self.settings['new_book_format'].upper(),
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book=book_id, uncompressed_size=os.path.getsize(file_path + format_new_ext))
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try:
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local_db.session.merge(new_format)
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local_db.session.commit()
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if self.settings['new_book_format'].upper() in ['KEPUB', 'EPUB', 'EPUB3']:
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ub_session = init_db_thread()
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remove_synced_book(book_id, True, ub_session)
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ub_session.close()
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except SQLAlchemyError as e:
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local_db.session.rollback()
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log.error("Database error: %s", e)
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local_db.session.close()
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self._handleError(error_message)
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return
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self.results['path'] = cur_book.path
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self.title = cur_book.title
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self.results['title'] = self.title
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if not config.config_use_google_drive:
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self._handleSuccess()
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return os.path.basename(file_path + format_new_ext)
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else:
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error_message = N_('%(format)s format not found on disk', format=format_new_ext.upper())
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local_db.session.close()
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log.info("ebook converter failed with error while converting book")
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if not error_message:
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error_message = N_('Ebook converter failed with unknown error')
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self._handleError(error_message)
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return
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def _convert_kepubify(self, file_path, format_old_ext, format_new_ext):
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quotes = [1, 3]
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command = [config.config_kepubifypath, (file_path + format_old_ext), '-o', os.path.dirname(file_path)]
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try:
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p = process_open(command, quotes)
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except OSError as e:
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return 1, N_(u"Kepubify-converter failed: %(error)s", error=e)
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self.progress = 0.01
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while True:
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nextline = p.stdout.readlines()
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nextline = [x.strip('\n') for x in nextline if x != '\n']
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for line in nextline:
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log.debug(line)
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if p.poll() is not None:
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break
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# ToD Handle
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# process returncode
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check = p.returncode
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# move file
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if check == 0:
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converted_file = glob(os.path.join(os.path.dirname(file_path), "*.kepub.epub"))
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if len(converted_file) == 1:
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copyfile(converted_file[0], (file_path + format_new_ext))
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os.unlink(converted_file[0])
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else:
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return 1, N_(u"Converted file not found or more than one file in folder %(folder)s",
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folder=os.path.dirname(file_path))
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return check, None
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def _convert_calibre(self, file_path, format_old_ext, format_new_ext):
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book_id = self.book_id
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try:
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# Linux py2.7 encode as list without quotes no empty element for parameters
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# linux py3.x no encode and as list without quotes no empty element for parameters
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# windows py2.7 encode as string with quotes empty element for parameters is okay
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# windows py 3.x no encode and as string with quotes empty element for parameters is okay
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# separate handling for windows and linux
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quotes = [3, 5]
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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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calibredb_binarypath = config.get_calibre_binarypath("calibredb")
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opf_command = [calibredb_binarypath, 'show_metadata', '--as-opf', str(book_id), '--with-library', config.config_calibre_dir]
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p = process_open(opf_command, quotes)
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path_tmp_opf = os.path.join(tmp_dir, "metadata_" + str(current_milli_time()) + ".opf")
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with open(path_tmp_opf, 'w') as fd:
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copyfileobj(p.stdout, fd)
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quotes = [1, 2, 4, 6]
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command = [config.config_converterpath, (file_path + format_old_ext),
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(file_path + format_new_ext), '--from-opf', path_tmp_opf,
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'--cover', os.path.join(os.path.dirname(file_path), 'cover.jpg')]
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quotes_index = 3
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if config.config_calibre:
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parameters = config.config_calibre.split(" ")
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for param in parameters:
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command.append(param)
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quotes.append(quotes_index)
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quotes_index += 1
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p = process_open(command, quotes, newlines=False)
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except (ValueError, OSError) as e:
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return 1, N_(u"Ebook-converter failed: %(error)s", error=e)
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while p.poll() is None:
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nextline = p.stdout.readline()
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if isinstance(nextline, bytes):
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nextline = nextline.decode('utf-8', errors="ignore").strip('\r\n')
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if nextline:
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log.debug(nextline)
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# parse progress string from calibre-converter
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progress = re.search(r"(\d+)%\s.*", nextline)
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if progress:
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self.progress = int(progress.group(1)) / 100
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if config.config_use_google_drive:
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self.progress *= 0.9
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# process returncode
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check = p.returncode
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calibre_traceback = p.stderr.readlines()
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error_message = ""
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for ele in calibre_traceback:
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ele = ele.decode('utf-8', errors="ignore").strip('\n')
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log.debug(ele)
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if not ele.startswith('Traceback') and not ele.startswith(' File'):
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error_message = N_("Calibre failed with error: %(error)s", error=ele)
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return check, error_message
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@property
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def name(self):
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return N_("Convert")
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def __str__(self):
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return "Convert {} {}".format(self.book_id, self.kindle_mail)
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@property
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def is_cancellable(self):
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return False
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