mygpo/data/delicious.py

   1 #
   2 # This file is part of gpodder.net.
   3 #
   4 # my.gpodder.org is free software: you can redistribute it and/or modify it
   5 # under the terms of the GNU Affero General Public License as published by
   6 # the Free Software Foundation, either version 3 of the License, or (at your
   7 # option) any later version.
   8 #
   9 # my.gpodder.org is distributed in the hope that it will be useful, but
  10 # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11 # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public
  12 # License for more details.
  13 #
  14 # You should have received a copy of the GNU Affero General Public License
  15 # along with my.gpodder.org. If not, see <http://www.gnu.org/licenses/>.
  16 #
  17
  18
  19 import json
  20 import hashlib
  21 import urllib.request, urllib.parse, urllib.error
  22 import urllib.parse
  23
  24
  25 def get_tags(url):
  26     """
  27     queries the public API of delicious.com and retrieves a dictionary of all
  28     tags that have been used for the url, with the number of users that have
  29     used each tag
  30     """
  31
  32     split = urllib.parse.urlsplit(url)
  33     if split.path == '':
  34         split = urllib.parse.SplitResult(split.scheme, split.netloc, '/', split.query, split.fragment)
  35     url = split.geturl()
  36
  37     m = hashlib.md5()
  38     m.update(url.encode('ascii'))
  39
  40     url_md5 = m.hexdigest()
  41     req = 'http://feeds.delicious.com/v2/json/urlinfo/%s' % url_md5
  42
  43     resp = urllib.request.urlopen(req).read()
  44     try:
  45         resp_obj = json.loads(resp)
  46     except ValueError:
  47         return {}
  48
  49     tags = {}
  50     for o in resp_obj:
  51         if (not 'top_tags' in o) or (not o['top_tags']):
  52             return {}
  53         for tag, count in o['top_tags'].items():
  54             tags[tag] = count
  55
  56
  57     return tags