calibre-web/cps/epub.py

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
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import zipfile
from lxml import etree
import os
import uploader
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from iso639 import languages as isoLanguages
def extractCover(zip, coverFile, coverpath, tmp_file_name):
if coverFile is None:
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return None
else:
zipCoverPath = os.path.join(coverpath , coverFile).replace('\\','/')
cf = zip.read(zipCoverPath)
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prefix = os.path.splitext(tmp_file_name)[0]
tmp_cover_name = prefix + '.' + os.path.basename(zipCoverPath)
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image = open(tmp_cover_name, 'wb')
image.write(cf)
image.close()
return tmp_cover_name
def get_epub_info(tmp_file_path, original_file_name, original_file_extension):
ns = {
'n': 'urn:oasis:names:tc:opendocument:xmlns:container',
'pkg': 'http://www.idpf.org/2007/opf',
'dc': 'http://purl.org/dc/elements/1.1/'
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}
zip = zipfile.ZipFile(tmp_file_path)
txt = zip.read('META-INF/container.xml')
tree = etree.fromstring(txt)
cfname = tree.xpath('n:rootfiles/n:rootfile/@full-path', namespaces=ns)[0]
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cf = zip.read(cfname)
tree = etree.fromstring(cf)
coverpath=os.path.dirname(cfname)
p = tree.xpath('/pkg:package/pkg:metadata', namespaces=ns)[0]
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epub_metadata = {}
try:#maybe description isn't present
comments = tree.xpath("//*[local-name() = 'description']/text()")[0]
epub_metadata['comments'] = comments
except:
epub_metadata['comments'] = ""
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for s in ['title', 'description', 'creator']:
tmp = p.xpath('dc:%s/text()' % s, namespaces=ns)
if len(tmp) > 0:
epub_metadata[s] = p.xpath('dc:%s/text()' % s, namespaces=ns)[0]
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else:
epub_metadata[s] = "Unknown"
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#detect lang need futher modification in web.py /upload
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try:#maybe dc:language isn't present, less possible but possible
lang = p.xpath('dc:language/text()', namespaces=ns)[0]
lang = lang.split('-', 1)[0]
lang.lower()
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if len(lang) == 2:
epub_metadata['languages'] = isoLanguages.get(part1=lang).name
elif len(lang) == 3:
epub_metadata['languages'] = isoLanguages.get(part3=lang).name
else:
epub_metadata['languages'] = ""
except:
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epub_metadata['languages'] = ""
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coversection = tree.xpath("/pkg:package/pkg:manifest/pkg:item[@id='cover-image']/@href", namespaces=ns)
coverfile = None
if len(coversection) > 0:
coverfile = extractCover(zip, coversection[0], coverpath, tmp_file_path)
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else:
coversection = tree.xpath("/pkg:package/pkg:manifest/pkg:item[@id='cover']/@href", namespaces=ns)
if len(coversection) > 0:
filetype = coversection[0].rsplit('.',1)[-1]
if filetype == "xhtml" or filetype == "html": #if cover is (x)html format
markup = zip.read(os.path.join(coverpath,coversection[0]))
markupTree = etree.fromstring(markup)
#no matter xhtml or html with no namespace
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imgsrc = markupTree.xpath("//*[local-name() = 'img']/@src")
#imgsrc maybe startwith "../"" so fullpath join then relpath to cwd
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filename = os.path.relpath(os.path.join(os.path.dirname(os.path.join(coverpath, coversection[0])), imgsrc[0]))
coverfile = extractCover(zip, filename, "", tmp_file_path)
else:
coverfile = extractCover(zip, coversection[0], coverpath, tmp_file_path)
else:
meta_cover = tree.xpath("/pkg:package/pkg:metadata/pkg:meta[@name='cover']/@content", namespaces=ns)
if len(meta_cover) > 0:
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meta_cover_content = tree.xpath("/pkg:package/pkg:manifest/pkg:item[@id='"+meta_cover[0]+"']/@href", namespaces=ns)
if len(meta_cover_content) > 0:
coverfile = extractCover(zip, meta_cover_content[0], coverpath, tmp_file_path)
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if epub_metadata['title'] is None:
title = original_file_name
else:
title = epub_metadata['title']
return uploader.BookMeta(
file_path=tmp_file_path,
extension=original_file_extension,
title=title.encode('utf-8').decode('utf-8'),
author=epub_metadata['creator'].encode('utf-8').decode('utf-8'),
cover=coverfile,
description=epub_metadata['description'],
tags="",
series="",
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series_id="",
comments=epub_metadata['comments'],
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languages=epub_metadata['languages'])