calibre-web/cps/epub_helper.py
Ozzie Isaacs 64e4a1155c Code cosmetics
Bugfix missing bleach tags (#3080)
Bugfix pdfreader
2024-06-20 19:12:46 +02:00

170 lines
7.3 KiB
Python

# -*- coding: utf-8 -*-
# This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
# Copyright (C) 2018 lemmsh, Kennyl, Kyosfonica, matthazinski
#
# 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 zipfile
from lxml import etree
from . import isoLanguages
default_ns = {
'n': 'urn:oasis:names:tc:opendocument:xmlns:container',
'pkg': 'http://www.idpf.org/2007/opf',
}
OPF_NAMESPACE = "http://www.idpf.org/2007/opf"
PURL_NAMESPACE = "http://purl.org/dc/elements/1.1/"
OPF = "{%s}" % OPF_NAMESPACE
PURL = "{%s}" % PURL_NAMESPACE
etree.register_namespace("opf", OPF_NAMESPACE)
etree.register_namespace("dc", PURL_NAMESPACE)
OPF_NS = {None: OPF_NAMESPACE} # the default namespace (no prefix)
NSMAP = {'dc': PURL_NAMESPACE, 'opf': OPF_NAMESPACE}
def updateEpub(src, dest, filename, data, ):
# create a temp copy of the archive without filename
with zipfile.ZipFile(src, 'r') as zin:
with zipfile.ZipFile(dest, 'w') as zout:
zout.comment = zin.comment # preserve the comment
for item in zin.infolist():
if item.filename != filename:
zout.writestr(item, zin.read(item.filename))
# now add filename with its new data
with zipfile.ZipFile(dest, mode='a', compression=zipfile.ZIP_DEFLATED) as zf:
zf.writestr(filename, data)
def get_content_opf(file_path, ns=None):
if ns is None:
ns = default_ns
epubZip = zipfile.ZipFile(file_path)
txt = epubZip.read('META-INF/container.xml')
tree = etree.fromstring(txt)
cf_name = tree.xpath('n:rootfiles/n:rootfile/@full-path', namespaces=ns)[0]
cf = epubZip.read(cf_name)
return etree.fromstring(cf), cf_name
def create_new_metadata_backup(book, custom_columns, export_language, translated_cover_name, lang_type=3):
# generate root package element
package = etree.Element(OPF + "package", nsmap=OPF_NS)
package.set("unique-identifier", "uuid_id")
package.set("version", "2.0")
# generate metadata element and all sub elements of it
metadata = etree.SubElement(package, "metadata", nsmap=NSMAP)
identifier = etree.SubElement(metadata, PURL + "identifier", id="calibre_id", nsmap=NSMAP)
identifier.set(OPF + "scheme", "calibre")
identifier.text = str(book.id)
identifier2 = etree.SubElement(metadata, PURL + "identifier", id="uuid_id", nsmap=NSMAP)
identifier2.set(OPF + "scheme", "uuid")
identifier2.text = book.uuid
for i in book.identifiers:
identifier = etree.SubElement(metadata, PURL + "identifier", nsmap=NSMAP)
identifier.set(OPF + "scheme", i.format_type())
identifier.text = str(i.val)
title = etree.SubElement(metadata, PURL + "title", nsmap=NSMAP)
title.text = book.title
for author in book.authors:
creator = etree.SubElement(metadata, PURL + "creator", nsmap=NSMAP)
creator.text = str(author.name)
creator.set(OPF + "file-as", book.author_sort) # ToDo Check
creator.set(OPF + "role", "aut")
contributor = etree.SubElement(metadata, PURL + "contributor", nsmap=NSMAP)
contributor.text = "calibre (5.7.2) [https://calibre-ebook.com]"
contributor.set(OPF + "file-as", "calibre") # ToDo Check
contributor.set(OPF + "role", "bkp")
date = etree.SubElement(metadata, PURL + "date", nsmap=NSMAP)
date.text = '{d.year:04}-{d.month:02}-{d.day:02}T{d.hour:02}:{d.minute:02}:{d.second:02}'.format(d=book.pubdate)
if book.comments and book.comments[0].text:
for b in book.comments:
description = etree.SubElement(metadata, PURL + "description", nsmap=NSMAP)
description.text = b.text
for b in book.publishers:
publisher = etree.SubElement(metadata, PURL + "publisher", nsmap=NSMAP)
publisher.text = str(b.name)
if not book.languages:
language = etree.SubElement(metadata, PURL + "language", nsmap=NSMAP)
language.text = export_language
else:
for b in book.languages:
language = etree.SubElement(metadata, PURL + "language", nsmap=NSMAP)
language.text = str(b.lang_code) if lang_type == 3 else isoLanguages.get(part3=b.lang_code).part1
for b in book.tags:
subject = etree.SubElement(metadata, PURL + "subject", nsmap=NSMAP)
subject.text = str(b.name)
etree.SubElement(metadata, "meta", name="calibre:author_link_map",
content="{" + ", ".join(['"' + str(a.name) + '": ""' for a in book.authors]) + "}",
nsmap=NSMAP)
for b in book.series:
etree.SubElement(metadata, "meta", name="calibre:series",
content=str(str(b.name)),
nsmap=NSMAP)
if book.series:
etree.SubElement(metadata, "meta", name="calibre:series_index",
content=str(book.series_index),
nsmap=NSMAP)
if len(book.ratings) and book.ratings[0].rating > 0:
etree.SubElement(metadata, "meta", name="calibre:rating",
content=str(book.ratings[0].rating),
nsmap=NSMAP)
etree.SubElement(metadata, "meta", name="calibre:timestamp",
content='{d.year:04}-{d.month:02}-{d.day:02}T{d.hour:02}:{d.minute:02}:{d.second:02}'.format(
d=book.timestamp),
nsmap=NSMAP)
etree.SubElement(metadata, "meta", name="calibre:title_sort",
content=book.sort,
nsmap=NSMAP)
sequence = 0
for cc in custom_columns:
value = None
extra = None
cc_entry = getattr(book, "custom_column_" + str(cc.id))
if cc_entry.__len__():
value = [c.value for c in cc_entry] if cc.is_multiple else cc_entry[0].value
extra = cc_entry[0].extra if hasattr(cc_entry[0], "extra") else None
etree.SubElement(metadata, "meta", name="calibre:user_metadata:#{}".format(cc.label),
content=cc.to_json(value, extra, sequence),
nsmap=NSMAP)
sequence += 1
# generate guide element and all sub elements of it
# Title is translated from default export language
guide = etree.SubElement(package, "guide")
etree.SubElement(guide, "reference", type="cover", title=translated_cover_name, href="cover.jpg")
return package
def replace_metadata(tree, package):
rep_element = tree.xpath('/pkg:package/pkg:metadata', namespaces=default_ns)[0]
new_element = package.xpath('//metadata', namespaces=default_ns)[0]
tree.replace(rep_element, new_element)
return etree.tostring(tree,
xml_declaration=True,
encoding='utf-8',
pretty_print=True).decode('utf-8')