#!/usr/bin/env 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 . from __future__ import division, print_function, unicode_literals import os import hashlib from tempfile import gettempdir from . import logger, comic from .constants import BookMeta log = logger.create() try: from lxml.etree import LXML_VERSION as lxmlversion except ImportError: lxmlversion = None 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: 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 __author__ = 'lemmsh' 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: log.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 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')) 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 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() as img: img.options["pdf:use-cropbox"] = "true" img.read(filename=tmp_file_path + '[0]', resolution = 150) img.compression_quality = 88 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) 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 = 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): 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() md5.update(filename.encode('utf-8')) tmp_file_path = os.path.join(tmp_dir, md5.hexdigest()) log.debug("Temporary file: %s", tmp_file_path) uploadfile.save(tmp_file_path) meta = process(tmp_file_path, filename_root, file_extension) return meta