You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
parallel-library/cps/book_formats.py

156 lines
5.1 KiB
Python

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
# Copyright (C) 2016-2019 lemmsh cervinko Kennyl matthazinski 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/>.
import logging
import uploader
import os
from flask_babel import gettext as _
import comic
try:
from lxml.etree import LXML_VERSION as lxmlversion
except ImportError:
lxmlversion = None
__author__ = 'lemmsh'
logger = logging.getLogger("book_formats")
try:
from wand.image import Image
from wand import version as ImageVersion
use_generic_pdf_cover = False
except (ImportError, RuntimeError) as e:
logger.warning('cannot import Image, generating pdf covers for pdf uploads will not work: %s', e)
use_generic_pdf_cover = True
try:
from PyPDF2 import PdfFileReader
from PyPDF2 import __version__ as PyPdfVersion
use_pdf_meta = True
except ImportError as e:
logger.warning('cannot import PyPDF2, extracting pdf metadata will not work: %s', e)
use_pdf_meta = False
try:
import epub
use_epub_meta = True
except ImportError as e:
logger.warning('cannot import epub, extracting epub metadata will not work: %s', e)
use_epub_meta = False
try:
import fb2
use_fb2_meta = True
except ImportError as e:
logger.warning('cannot import fb2, extracting fb2 metadata will not work: %s', e)
use_fb2_meta = False
def process(tmp_file_path, original_file_name, original_file_extension):
meta = None
try:
if ".PDF" == original_file_extension.upper():
meta = pdf_meta(tmp_file_path, original_file_name, original_file_extension)
if ".EPUB" == original_file_extension.upper() and use_epub_meta is True:
meta = epub.get_epub_info(tmp_file_path, original_file_name, original_file_extension)
if ".FB2" == original_file_extension.upper() and use_fb2_meta is True:
meta = fb2.get_fb2_info(tmp_file_path, original_file_extension)
if original_file_extension.upper() in ['.CBZ', '.CBT']:
meta = comic.get_comic_info(tmp_file_path, original_file_name, original_file_extension)
except Exception as ex:
logger.warning('cannot parse metadata, using default: %s', ex)
if meta and meta.title.strip() and meta.author.strip():
return meta
else:
return default_meta(tmp_file_path, original_file_name, original_file_extension)
def default_meta(tmp_file_path, original_file_name, original_file_extension):
return uploader.BookMeta(
file_path=tmp_file_path,
extension=original_file_extension,
title=original_file_name,
author=u"Unknown",
cover=None,
description="",
tags="",
series="",
series_id="",
languages="")
def pdf_meta(tmp_file_path, original_file_name, original_file_extension):
if use_pdf_meta:
pdf = PdfFileReader(open(tmp_file_path, 'rb'))
doc_info = pdf.getDocumentInfo()
else:
doc_info = None
if doc_info is not None:
author = doc_info.author if doc_info.author else u"Unknown"
title = doc_info.title if doc_info.title else original_file_name
subject = doc_info.subject
else:
author = u"Unknown"
title = original_file_name
subject = ""
return uploader.BookMeta(
file_path=tmp_file_path,
extension=original_file_extension,
title=title,
author=author,
cover=pdf_preview(tmp_file_path, original_file_name),
description=subject,
tags="",
series="",
series_id="",
languages="")
def pdf_preview(tmp_file_path, tmp_dir):
if use_generic_pdf_cover:
return None
else:
cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.jpg"
with Image(filename=tmp_file_path + "[0]", resolution=150) as img:
img.compression_quality = 88
img.save(filename=os.path.join(tmp_dir, cover_file_name))
return cover_file_name
def get_versions():
if not use_generic_pdf_cover:
IVersion = ImageVersion.MAGICK_VERSION
WVersion = ImageVersion.VERSION
else:
IVersion = _(u'not installed')
WVersion = _(u'not installed')
if use_pdf_meta:
PVersion='v'+PyPdfVersion
else:
PVersion=_(u'not installed')
if lxmlversion:
XVersion = 'v'+'.'.join(map(str, lxmlversion))
else:
XVersion = _(u'not installed')
return {'Image Magick': IVersion, 'PyPdf': PVersion, 'lxml':XVersion, 'Wand Version': WVersion}