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better epub parsing

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- dont fail if epubs are invalid zip
- handle quoted filenames
- dont fail if file is missing
This commit is contained in:
j 2015-11-16 16:02:45 +01:00
parent b66f8cd026
commit a24061518a
1 changed files with 24 additions and 11 deletions
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23
oml/media/epub.py
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@ -7,6 +7,7 @@ import xml.etree.ElementTree as ET
import zipfile
from io import BytesIO
import re
from urllib.parse import unquote
from PIL import Image
import stdnum.isbn
@ -18,31 +19,39 @@ logger = logging.getLogger('oml.media.epub')
def cover(path):
logger.debug('cover %s', path)
z = zipfile.ZipFile(path)
data = None
try:
z = zipfile.ZipFile(path)
except zipfile.BadZipFile:
logger.debug('invalid epub file %s', path)
return data
for f in z.filelist:
if 'cover' in f.filename.lower() and f.filename.split('.')[-1] in ('jpg', 'jpeg', 'png'):
logger.debug('using %s', f.filename)
data = z.read(f.filename)
break
if not data:
opf = [f.filename for f in z.filelist if f.filename.endswith('opf')]
files = [f.filename for f in z.filelist]
opf = [f for f in files if f.endswith('opf')]
if opf:
info = ET.fromstring(z.read(opf[0]))
manifest = info.findall('{http://www.idpf.org/2007/opf}manifest')[0]
for e in manifest.getchildren():
if 'image' in e.attrib['media-type']:
filename = e.attrib['href']
filename = unquote(e.attrib['href'])
filename = os.path.normpath(os.path.join(os.path.dirname(opf[0]), filename))
if filename in files:
data = z.read(filename)
break
elif 'html' in e.attrib['media-type']:
filename = e.attrib['href']
filename = unquote(e.attrib['href'])
filename = os.path.normpath(os.path.join(os.path.dirname(opf[0]), filename))
html = z.read(filename).decode('utf-8')
img = re.compile('<img.*?src="(.*?)"').findall(html)
if img:
img = os.path.normpath(os.path.join(os.path.dirname(filename), img[0]))
img = unquote(img[0])
img = os.path.normpath(os.path.join(os.path.dirname(filename), img))
if img in files:
logger.debug('using %s', img)
data = z.read(img)
break
@ -56,7 +65,11 @@ def cover(path):
def info(epub):
data = {}
try:
z = zipfile.ZipFile(epub)
except zipfile.BadZipFile:
logger.debug('invalid epub file %s', epub)
return data
opf = [f.filename for f in z.filelist if f.filename.endswith('opf')]
if opf:
info = ET.fromstring(z.read(opf[0]))