Current File : //usr/lib/calibre/calibre/ebooks/metadata/xisbn.py
#!/usr/bin/env python3
__license__ = 'GPL v3'
__copyright__ = '2010, Kovid Goyal <kovid@kovidgoyal.net>'
__docformat__ = 'restructuredtext en'
import threading, re, json
from calibre import browser
class xISBN:
'''
This class is used to find the ISBN numbers of "related" editions of a
book, given its ISBN. Useful when querying services for metadata by ISBN,
in case they do not have the ISBN for the particular edition.
'''
QUERY = 'http://xisbn.worldcat.org/webservices/xid/isbn/%s?method=getEditions&format=json&fl=form,year,lang,ed'
def __init__(self):
self.lock = threading.RLock()
self._data = []
self._map = {}
self.isbn_pat = re.compile(r'[^0-9X]', re.IGNORECASE)
def purify(self, isbn):
return self.isbn_pat.sub('', isbn.upper())
def fetch_data(self, isbn):
# xisbn service has been de-comissioned see
# https://www.oclc.org/developer/news/2018/xid-decommission.en.html
return []
url = self.QUERY%isbn
data = browser().open_novisit(url).read()
data = json.loads(data)
if data.get('stat', None) != 'ok':
return []
data = data.get('list', [])
ans = []
for rec in data:
forms = rec.get('form', [])
# Only get books, not audio/video
forms = [x for x in forms if x in ('BA', 'BC', 'BB', 'DA')]
if forms:
ans.append(rec)
return ans
def isbns_in_data(self, data):
for rec in data:
yield from rec.get('isbn', [])
def get_data(self, isbn):
isbn = self.purify(isbn)
with self.lock:
if isbn not in self._map:
try:
data = self.fetch_data(isbn)
except:
import traceback
traceback.print_exc()
data = []
id_ = len(self._data)
self._data.append(data)
for i in self.isbns_in_data(data):
self._map[i] = id_
self._map[isbn] = id_
return self._data[self._map[isbn]]
def get_associated_isbns(self, isbn):
data = self.get_data(isbn)
ans = set()
for rec in data:
for i in rec.get('isbn', []):
ans.add(i)
return ans
def get_isbn_pool(self, isbn):
data = self.get_data(isbn)
raw = tuple(x.get('isbn') for x in data if 'isbn' in x)
isbns = []
for x in raw:
isbns += x
isbns = frozenset(isbns)
min_year = 100000
for x in data:
try:
year = int(x['year'])
if year < min_year:
min_year = year
except:
continue
if min_year == 100000:
min_year = None
return isbns, min_year
xisbn = xISBN()
if __name__ == '__main__':
import sys, pprint
isbn = sys.argv[-1]
print(pprint.pprint(xisbn.get_data(isbn)))
print()
print(xisbn.get_associated_isbns(isbn))
Mini Shell