philo/contrib/sobol/utils.py

   1 from django.conf import settings
   2 from django.http import QueryDict
   3 from django.utils.encoding import smart_str
   4 from django.utils.http import urlquote_plus, urlquote
   5 from hashlib import sha1
   6
   7
   8 SEARCH_ARG_GET_KEY = 'q'
   9 URL_REDIRECT_GET_KEY = 'url'
  10 HASH_REDIRECT_GET_KEY = 's'
  11
  12
  13 def make_redirect_hash(search_arg, url):
  14         return sha1(smart_str(search_arg + url + settings.SECRET_KEY)).hexdigest()[::2]
  15
  16
  17 def check_redirect_hash(hash, search_arg, url):
  18         return hash == make_redirect_hash(search_arg, url)
  19
  20
  21 def make_tracking_querydict(search_arg, url):
  22         """
  23         Returns a QueryDict instance containing the information necessary
  24         for tracking clicks of this url.
  25
  26         NOTE: will this kind of initialization handle quoting correctly?
  27         """
  28         return QueryDict("%s=%s&%s=%s&%s=%s" % (
  29                 SEARCH_ARG_GET_KEY, urlquote_plus(search_arg),
  30                 URL_REDIRECT_GET_KEY, urlquote(url),
  31                 HASH_REDIRECT_GET_KEY, make_redirect_hash(search_arg, url))
  32         )