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6f7a240ce2
* Ensure file paths in uploads are non-empty, fix #183 * Fix AttributeError in process(), handle strings of spaces
124 lines
3.8 KiB
Python
124 lines
3.8 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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import logging
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import uploader
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import os
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from flask_babel import gettext as _
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__author__ = 'lemmsh'
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logger = logging.getLogger("book_formats")
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try:
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from wand.image import Image
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from wand import version as ImageVersion
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use_generic_pdf_cover = False
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except ImportError as e:
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logger.warning('cannot import Image, generating pdf covers for pdf uploads will not work: %s', e)
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use_generic_pdf_cover = True
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try:
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from PyPDF2 import PdfFileReader
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from PyPDF2 import __version__ as PyPdfVersion
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use_pdf_meta = True
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except ImportError as e:
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logger.warning('cannot import PyPDF2, extracting pdf metadata will not work: %s', e)
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use_pdf_meta = False
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try:
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import epub
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use_epub_meta = True
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except ImportError as e:
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logger.warning('cannot import epub, extracting epub metadata will not work: %s', e)
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use_epub_meta = False
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try:
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import fb2
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use_fb2_meta = True
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except ImportError as e:
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logger.warning('cannot import fb2, extracting fb2 metadata will not work: %s', e)
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use_fb2_meta = False
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def process(tmp_file_path, original_file_name, original_file_extension):
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meta = None
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try:
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if ".PDF" == original_file_extension.upper():
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meta = pdf_meta(tmp_file_path, original_file_name, original_file_extension)
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if ".EPUB" == original_file_extension.upper() and use_epub_meta is True:
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meta = epub.get_epub_info(tmp_file_path, original_file_name, original_file_extension)
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if ".FB2" == original_file_extension.upper() and use_fb2_meta is True:
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meta = fb2.get_fb2_info(tmp_file_path, original_file_extension)
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except Exception as e:
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logger.warning('cannot parse metadata, using default: %s', e)
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if meta and meta.title.strip() and meta.author.strip():
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return meta
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else:
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return default_meta(tmp_file_path, original_file_name, original_file_extension)
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def default_meta(tmp_file_path, original_file_name, original_file_extension):
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return uploader.BookMeta(
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file_path=tmp_file_path,
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extension=original_file_extension,
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title=original_file_name,
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author=u"Unknown",
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cover=None,
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description="",
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tags="",
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series="",
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series_id="",
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languages="")
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def pdf_meta(tmp_file_path, original_file_name, original_file_extension):
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if use_pdf_meta:
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pdf = PdfFileReader(open(tmp_file_path, 'rb'))
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doc_info = pdf.getDocumentInfo()
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else:
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doc_info = None
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if doc_info is not None:
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author = doc_info.author if doc_info.author else u"Unknown"
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title = doc_info.title if doc_info.title else original_file_name
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subject = doc_info.subject
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else:
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author = u"Unknown"
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title = original_file_name
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subject = ""
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return uploader.BookMeta(
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file_path=tmp_file_path,
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extension=original_file_extension,
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title=title,
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author=author,
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cover=pdf_preview(tmp_file_path, original_file_name),
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description=subject,
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tags="",
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series="",
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series_id="",
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languages="")
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def pdf_preview(tmp_file_path, tmp_dir):
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if use_generic_pdf_cover:
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return None
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else:
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cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.jpg"
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with Image(filename=tmp_file_path + "[0]", resolution=150) as img:
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img.compression_quality = 88
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img.save(filename=os.path.join(tmp_dir, cover_file_name))
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return cover_file_name
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def get_versions():
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if not use_generic_pdf_cover:
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IVersion=ImageVersion.MAGICK_VERSION
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else:
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IVersion=_(u'not installed')
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if use_pdf_meta:
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PVersion=PyPdfVersion
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else:
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PVersion=_(u'not installed')
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return {'ImageVersion':IVersion,'PyPdfVersion':PVersion}
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