philo/contrib/sobol/utils.py

   1 from hashlib import sha1
   2
   3 from django.conf import settings
   4 from django.http import QueryDict
   5 from django.utils.encoding import smart_str
   6 from django.utils.http import urlquote_plus, urlquote
   7
   8
   9 SEARCH_ARG_GET_KEY = 'q'
  10 URL_REDIRECT_GET_KEY = 'url'
  11 HASH_REDIRECT_GET_KEY = 's'
  12
  13
  14 def make_redirect_hash(search_arg, url):
  15         return sha1(smart_str(search_arg + url + settings.SECRET_KEY)).hexdigest()[::2]
  16
  17
  18 def check_redirect_hash(hash, search_arg, url):
  19         return hash == make_redirect_hash(search_arg, url)
  20
  21
  22 def make_tracking_querydict(search_arg, url):
  23         """
  24         Returns a QueryDict instance containing the information necessary
  25         for tracking clicks of this url.
  26
  27         NOTE: will this kind of initialization handle quoting correctly?
  28         """
  29         return QueryDict("%s=%s&%s=%s&%s=%s" % (
  30                 SEARCH_ARG_GET_KEY, urlquote_plus(search_arg),
  31                 URL_REDIRECT_GET_KEY, urlquote(url),
  32                 HASH_REDIRECT_GET_KEY, make_redirect_hash(search_arg, url))
  33         )