openmedialibrary/oml/media/opf.py

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# -*- coding: utf-8 -*-
# vi:si:et:sw=4:sts=4:ts=4
2014-09-02 22:32:44 +00:00
import xml.etree.ElementTree as ET
import stdnum.isbn
from utils import normalize_isbn
from ox import strip_tags
import ox.iso
import logging
logger = logging.getLogger(__name__)
def info(opf):
data = {}
try:
with open(opf, 'rb') as fd:
opf = ET.fromstring(fd.read().decode())
except:
logger.debug('failed to load opf %s', opf, exc_info=1)
return data
ns = '{http://www.idpf.org/2007/opf}'
metadata = opf.findall(ns + 'metadata')[0]
for e in metadata.getchildren():
if e.text:
key = e.tag.split('}')[-1]
key = {
'creator': 'author',
}.get(key, key)
value = e.text
if key == 'identifier':
isbn = normalize_isbn(value)
if stdnum.isbn.is_valid(isbn):
if not 'isbn' in data:
data['isbn'] = [isbn]
else:
data['isbn'].append(isbn)
if e.attrib.get(ns + 'scheme') == 'AMAZON':
if not 'asin' in data:
data['asin'] = [value]
else:
data['asin'].append(value)
else:
data[key] = strip_tags(e.text)
#YYY-MM-DD
if 'date' in data and len(data['date']) > 10:
data['date'] =data['date'][:10]
if 'language' in data:
data['language'] = ox.iso.codeToLang(data['language'])
return data