App Engine and Facebook Connect - Install PyFacebook

gistfile1.py

def check_connect_session(self, request):
  """
  For use in a facebook Connect application running in Google App Engine
  Takes a Google App Engine Request
  http://code.google.com/appengine/docs/webapp/requestclass.html
  and determines if the current user has a valid session
  """

  # our session is stored in cookies - validate them
  params = self.validate_cookie(request.cookies)

  if not params:
      return False

  if params.get('expires'):
      self.session_key_expires = int(params['expires'])

  if 'session_key' in params and 'user' in params:
      self.session_key = params['session_key']
      self.uid = params['user']
  else:
      return False

  return True

def validate_cookie(self, cookies):
  """
  Validates parameters passed to a Facebook connect app through cookies

  """
  # check for the hashed secret
  if self.api_key not in cookies:
      return None

  # create a dict of the elements that start with the api_key
  # the resultant dict removes the self.api_key from the beginning
  args = dict([(key[len(self.api_key) + 1:], value)
                  for key, value in cookies.items()
                  if key.startswith(self.api_key + "_")])

  # check the hashes match before returning them
  if self._hash_args(args) == cookies[self.api_key]:
      return args

  return None