#!/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 from wand.exceptions import PolicyError 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'), strict=False) 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: try: 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 except PolicyError as ex: logger.warning('Pdf extraction forbidden by Imagemagick policy: %s', ex) return None except Exception as ex: logger.warning('Cannot extract cover image, using default: %s', ex) return None 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}