# -*- 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 . from __future__ import division, print_function, unicode_literals import os import hashlib from tempfile import gettempdir from flask_babel import gettext as _ from . import logger, comic from .constants import BookMeta from .helper import split_authors log = logger.create() try: from lxml.etree import LXML_VERSION as lxmlversion except ImportError: lxmlversion = None 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 PyPDF2 import PdfFileReader from PyPDF2 import __version__ as PyPdfVersion use_pdf_meta = True except ImportError as e: log.debug('Cannot import PyPDF2, extracting pdf metadata will not work: %s', 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 try: from PIL import Image as PILImage from PIL import __version__ as PILversion use_PIL = True except ImportError as e: log.debug('Cannot import Pillow, using png and webp images as cover will not work: %s', e) use_PIL = 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="") def pdf_meta(tmp_file_path, original_file_name, original_file_extension): doc_info = None if use_pdf_meta: with open(tmp_file_path, 'rb') as f: doc_info = PdfFileReader(f).getDocumentInfo() if doc_info: 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 BookMeta( file_path=tmp_file_path, extension=original_file_extension, title=title, author=' & '.join(split_authors([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 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(): 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' if use_PIL: PILVersion = 'v' + PILversion else: PILVersion = u'not installed' if comic.use_comic_meta: ComicVersion = comic.comic_version or u'installed' else: ComicVersion = u'not installed' return {'Image Magick': IVersion, 'PyPdf': PVersion, 'lxml':XVersion, 'Wand': WVersion, 'Pillow': PILVersion, 'Comic_API': ComicVersion} 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() 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)