mirror of
https://github.com/janeczku/calibre-web
synced 2024-11-14 05:44:53 +00:00
256 lines
8.4 KiB
Python
256 lines
8.4 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
# This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
|
|
# Copyright (C) 2012-2019 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 os
|
|
import hashlib
|
|
from tempfile import gettempdir
|
|
from flask_babel import gettext as _
|
|
|
|
from . import logger, comic, isoLanguages
|
|
from .constants import BookMeta
|
|
from .helper import split_authors
|
|
|
|
log = logger.create()
|
|
|
|
try:
|
|
from wand.image import Image, Color
|
|
from wand import version as ImageVersion
|
|
from wand.exceptions import PolicyError
|
|
use_generic_pdf_cover = False
|
|
except (ImportError, RuntimeError) as e:
|
|
log.debug('Cannot import Image, generating pdf covers for pdf uploads will not work: %s', e)
|
|
use_generic_pdf_cover = True
|
|
|
|
try:
|
|
from PyPDF3 import PdfFileReader
|
|
from PyPDF3 import __version__ as PyPdfVersion
|
|
use_pdf_meta = True
|
|
except ImportError as ex:
|
|
try:
|
|
from PyPDF2 import PdfFileReader
|
|
from PyPDF2 import __version__ as PyPdfVersion
|
|
use_pdf_meta = True
|
|
except ImportError as e:
|
|
log.debug('Cannot import PyPDF3/PyPDF2, extracting pdf metadata will not work: %s / %s', ex, e)
|
|
use_pdf_meta = False
|
|
|
|
try:
|
|
from . import epub
|
|
use_epub_meta = True
|
|
except ImportError as e:
|
|
log.debug('Cannot import epub, extracting epub metadata will not work: %s', e)
|
|
use_epub_meta = False
|
|
|
|
try:
|
|
from . import fb2
|
|
use_fb2_meta = True
|
|
except ImportError as e:
|
|
log.debug('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, rarExecutable):
|
|
meta = None
|
|
extension_upper = original_file_extension.upper()
|
|
try:
|
|
if ".PDF" == extension_upper:
|
|
meta = pdf_meta(tmp_file_path, original_file_name, original_file_extension)
|
|
elif extension_upper in [".KEPUB", ".EPUB"] and use_epub_meta is True:
|
|
meta = epub.get_epub_info(tmp_file_path, original_file_name, original_file_extension)
|
|
elif ".FB2" == extension_upper and use_fb2_meta is True:
|
|
meta = fb2.get_fb2_info(tmp_file_path, original_file_extension)
|
|
elif extension_upper in ['.CBZ', '.CBT', '.CBR']:
|
|
meta = comic.get_comic_info(tmp_file_path,
|
|
original_file_name,
|
|
original_file_extension,
|
|
rarExecutable)
|
|
except Exception as ex:
|
|
log.warning('cannot parse metadata, using default: %s', ex)
|
|
|
|
if meta and meta.title.strip() and meta.author.strip():
|
|
if meta.author.lower() == 'unknown':
|
|
meta = meta._replace(author=_(u'Unknown'))
|
|
return meta
|
|
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 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="",
|
|
publisher="",
|
|
pubdate="",
|
|
identifiers=[]
|
|
)
|
|
|
|
|
|
def parse_xmp(pdf_file):
|
|
"""
|
|
Parse XMP Metadata and prepare for BookMeta object
|
|
"""
|
|
try:
|
|
xmp_info = pdf_file.getXmpMetadata()
|
|
except Exception as ex:
|
|
log.debug('Can not read XMP metadata {}'.format(ex))
|
|
return None
|
|
|
|
if xmp_info:
|
|
try:
|
|
xmp_author = xmp_info.dc_creator # list
|
|
except AttributeError:
|
|
xmp_author = ['Unknown']
|
|
|
|
if xmp_info.dc_title:
|
|
xmp_title = xmp_info.dc_title['x-default']
|
|
else:
|
|
xmp_title = ''
|
|
|
|
if xmp_info.dc_description:
|
|
xmp_description = xmp_info.dc_description['x-default']
|
|
else:
|
|
xmp_description = ''
|
|
|
|
languages = []
|
|
try:
|
|
for i in xmp_info.dc_language:
|
|
languages.append(isoLanguages.get_lang3(i))
|
|
except AttributeError:
|
|
languages.append('')
|
|
|
|
xmp_tags = ', '.join(xmp_info.dc_subject)
|
|
xmp_publisher = ', '.join(xmp_info.dc_publisher)
|
|
|
|
return {'author': xmp_author,
|
|
'title': xmp_title,
|
|
'subject': xmp_description,
|
|
'tags': xmp_tags,
|
|
'languages': languages,
|
|
'publisher': xmp_publisher
|
|
}
|
|
|
|
|
|
def pdf_meta(tmp_file_path, original_file_name, original_file_extension):
|
|
doc_info = None
|
|
xmp_info = None
|
|
|
|
if use_pdf_meta:
|
|
with open(tmp_file_path, 'rb') as f:
|
|
pdf_file = PdfFileReader(f)
|
|
doc_info = pdf_file.getDocumentInfo()
|
|
xmp_info = parse_xmp(pdf_file)
|
|
|
|
if xmp_info:
|
|
author = ' & '.join(split_authors(xmp_info['author']))
|
|
title = xmp_info['title']
|
|
subject = xmp_info['subject']
|
|
tags = xmp_info['tags']
|
|
languages = xmp_info['languages']
|
|
publisher = xmp_info['publisher']
|
|
else:
|
|
author = u'Unknown'
|
|
title = ''
|
|
languages = [""]
|
|
publisher = ""
|
|
subject = ""
|
|
tags = ""
|
|
|
|
if doc_info:
|
|
if author == '':
|
|
author = ' & '.join(split_authors([doc_info.author])) if doc_info.author else u'Unknown'
|
|
if title == '':
|
|
title = doc_info.title if doc_info.title else original_file_name
|
|
if subject == '':
|
|
subject = doc_info.subject or ""
|
|
if tags == '' and '/Keywords' in doc_info:
|
|
if isinstance(doc_info['/Keywords'], bytes):
|
|
tags = doc_info['/Keywords'].decode('utf-8')
|
|
else:
|
|
tags = doc_info['/Keywords']
|
|
else:
|
|
title = original_file_name
|
|
|
|
return 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=tags,
|
|
series="",
|
|
series_id="",
|
|
languages=','.join(languages),
|
|
publisher=publisher,
|
|
pubdate="",
|
|
identifiers=[])
|
|
|
|
|
|
def pdf_preview(tmp_file_path, tmp_dir):
|
|
if use_generic_pdf_cover:
|
|
return None
|
|
try:
|
|
cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.jpg"
|
|
with Image() as img:
|
|
img.options["pdf:use-cropbox"] = "true"
|
|
img.read(filename=tmp_file_path + '[0]', resolution=150)
|
|
img.compression_quality = 88
|
|
if img.alpha_channel:
|
|
img.alpha_channel = 'remove'
|
|
img.background_color = Color('white')
|
|
img.save(filename=os.path.join(tmp_dir, cover_file_name))
|
|
return cover_file_name
|
|
except PolicyError as ex:
|
|
log.warning('Pdf extraction forbidden by Imagemagick policy: %s', ex)
|
|
return None
|
|
except Exception as ex:
|
|
log.warning('Cannot extract cover image, using default: %s', ex)
|
|
log.warning('On Windows this error could be caused by missing ghostscript')
|
|
return None
|
|
|
|
|
|
def get_versions():
|
|
ret = dict()
|
|
if not use_generic_pdf_cover:
|
|
ret['Image Magick'] = ImageVersion.MAGICK_VERSION
|
|
else:
|
|
ret['Image Magick'] = u'not installed'
|
|
return ret
|
|
|
|
|
|
def upload(uploadfile, rarExcecutable):
|
|
tmp_dir = os.path.join(gettempdir(), 'calibre_web')
|
|
|
|
if not os.path.isdir(tmp_dir):
|
|
os.mkdir(tmp_dir)
|
|
|
|
filename = uploadfile.filename
|
|
filename_root, file_extension = os.path.splitext(filename)
|
|
md5 = hashlib.md5(filename.encode('utf-8')).hexdigest() # nosec
|
|
tmp_file_path = os.path.join(tmp_dir, md5)
|
|
log.debug("Temporary file: %s", tmp_file_path)
|
|
uploadfile.save(tmp_file_path)
|
|
return process(tmp_file_path, filename_root, file_extension, rarExcecutable)
|