code: def process_response(self, request, response):
          
          if hasattr(request, "facebook") and request.facebook and request.facebook.oauth_token:
              if "code" in request.REQUEST:
                  """ Remove auth related query params """
                  path = get_full_path(request, remove_querystrings=['code', 'web_canvas'])
                  response = HttpResponseRedirect(path)
  
              response.set_cookie('oauth_token', request.facebook.oauth_token.token)
          else:
              response.delete_cookie('oauth_token')
  
          response['P3P'] = 'CP="IDC CURa ADMa OUR IND PHY ONL COM STA"'
  
          return response
docs: Set compact P3P policies and save auth token to cookie.
  
          P3P is a WC3 standard (see http://www.w3.org/TR/P3P/), and although largely ignored by most
          browsers it is considered by IE before accepting third-party cookies (ie. cookies set by
          documents in iframes). If they are not set correctly, IE will not set these cookies.