145 lines
6 KiB
Python
145 lines
6 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) 2018 lemmsh, Kennyl, Kyosfonica, matthazinski
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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 __future__ import division, print_function, unicode_literals
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import os
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import zipfile
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from lxml import etree
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from . import isoLanguages
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from .helper import split_authors
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from .constants import BookMeta
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def extractCover(zipFile, coverFile, coverpath, tmp_file_name):
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if coverFile is None:
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return None
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else:
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zipCoverPath = os.path.join(coverpath, coverFile).replace('\\', '/')
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cf = zipFile.read(zipCoverPath)
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prefix = os.path.splitext(tmp_file_name)[0]
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tmp_cover_name = prefix + '.' + os.path.basename(zipCoverPath)
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image = open(tmp_cover_name, 'wb')
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image.write(cf)
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image.close()
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return tmp_cover_name
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def get_epub_info(tmp_file_path, original_file_name, original_file_extension):
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ns = {
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'n': 'urn:oasis:names:tc:opendocument:xmlns:container',
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'pkg': 'http://www.idpf.org/2007/opf',
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'dc': 'http://purl.org/dc/elements/1.1/'
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}
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epubZip = zipfile.ZipFile(tmp_file_path)
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txt = epubZip.read('META-INF/container.xml')
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tree = etree.fromstring(txt)
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cfname = tree.xpath('n:rootfiles/n:rootfile/@full-path', namespaces=ns)[0]
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cf = epubZip.read(cfname)
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tree = etree.fromstring(cf)
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coverpath = os.path.dirname(cfname)
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p = tree.xpath('/pkg:package/pkg:metadata', namespaces=ns)[0]
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epub_metadata = {}
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for s in ['title', 'description', 'creator', 'language', 'subject']:
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tmp = p.xpath('dc:%s/text()' % s, namespaces=ns)
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if len(tmp) > 0:
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if s == 'creator':
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epub_metadata[s] = ' & '.join(split_authors(p.xpath('dc:%s/text()' % s, namespaces=ns)))
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elif s == 'subject':
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epub_metadata[s] = ', '.join(p.xpath('dc:%s/text()' % s, namespaces=ns))
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else:
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epub_metadata[s] = p.xpath('dc:%s/text()' % s, namespaces=ns)[0]
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else:
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epub_metadata[s] = u'Unknown'
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if epub_metadata['subject'] == u'Unknown':
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epub_metadata['subject'] = ''
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if epub_metadata['description'] == u'Unknown':
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description = tree.xpath("//*[local-name() = 'description']/text()")
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if len(description) > 0:
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epub_metadata['description'] = description
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else:
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epub_metadata['description'] = ""
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lang = epub_metadata['language'].split('-', 1)[0].lower()
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epub_metadata['language'] = isoLanguages.get_lang3(lang)
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series = tree.xpath("/pkg:package/pkg:metadata/pkg:meta[@name='calibre:series']/@content", namespaces=ns)
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if len(series) > 0:
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epub_metadata['series'] = series[0]
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else:
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epub_metadata['series'] = ''
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series_id = tree.xpath("/pkg:package/pkg:metadata/pkg:meta[@name='calibre:series_index']/@content", namespaces=ns)
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if len(series_id) > 0:
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epub_metadata['series_id'] = series_id[0]
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else:
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epub_metadata['series_id'] = '1'
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coversection = tree.xpath("/pkg:package/pkg:manifest/pkg:item[@id='cover-image']/@href", namespaces=ns)
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coverfile = None
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if len(coversection) > 0:
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coverfile = extractCover(epubZip, coversection[0], coverpath, tmp_file_path)
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else:
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meta_cover = tree.xpath("/pkg:package/pkg:metadata/pkg:meta[@name='cover']/@content", namespaces=ns)
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if len(meta_cover) > 0:
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coversection = tree.xpath("/pkg:package/pkg:manifest/pkg:item[@id='"+meta_cover[0]+"']/@href", namespaces=ns)
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else:
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coversection = tree.xpath("/pkg:package/pkg:guide/pkg:reference/@href", namespaces=ns)
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if len(coversection) > 0:
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filetype = coversection[0].rsplit('.', 1)[-1]
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if filetype == "xhtml" or filetype == "html": # if cover is (x)html format
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markup = epubZip.read(os.path.join(coverpath, coversection[0]))
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markupTree = etree.fromstring(markup)
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# no matter xhtml or html with no namespace
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imgsrc = markupTree.xpath("//*[local-name() = 'img']/@src")
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# Alternative image source
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if not len(imgsrc):
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imgsrc = markupTree.xpath("//attribute::*[contains(local-name(), 'href')]")
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if len(imgsrc):
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# imgsrc maybe startwith "../"" so fullpath join then relpath to cwd
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filename = os.path.relpath(os.path.join(os.path.dirname(os.path.join(coverpath, coversection[0])),
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imgsrc[0]))
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coverfile = extractCover(epubZip, filename, "", tmp_file_path)
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else:
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coverfile = extractCover(epubZip, coversection[0], coverpath, tmp_file_path)
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if not epub_metadata['title']:
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title = original_file_name
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else:
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title = epub_metadata['title']
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return BookMeta(
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file_path=tmp_file_path,
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extension=original_file_extension,
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title=title.encode('utf-8').decode('utf-8'),
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author=epub_metadata['creator'].encode('utf-8').decode('utf-8'),
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cover=coverfile,
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description=epub_metadata['description'],
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tags=epub_metadata['subject'].encode('utf-8').decode('utf-8'),
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series=epub_metadata['series'].encode('utf-8').decode('utf-8'),
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series_id=epub_metadata['series_id'].encode('utf-8').decode('utf-8'),
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languages=epub_metadata['language'])
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