def process_response(self, request, response):
        if request.is_ajax() and hasattr(request, 'horizon'):
            queued_msgs = request.horizon['async_messages']
            if type(response) == http.HttpResponseRedirect:
                # Drop our messages back into the session as per usual so they
                # don't disappear during the redirect. Not that we explicitly
                # use django's messages methods here.
                for tag, message, extra_tags in queued_msgs:
                    getattr(django_messages, tag)(request, message, extra_tags)
                if response['location'].startswith(settings.LOGOUT_URL):
                    redirect_response = http.HttpResponse(status=401)
                    # This header is used for handling the logout in JS
                    redirect_response['logout'] = True
                    if self.logout_reason is not None:
                        utils.add_logout_reason(
                            request, redirect_response, self.logout_reason)
                else:
                    redirect_response = http.HttpResponse()
                # Use a set while checking if we want a cookie's attributes
                # copied
                cookie_keys = set(('max_age', 'expires', 'path', 'domain',
                                   'secure', 'httponly', 'logout_reason'))
                # Copy cookies from HttpResponseRedirect towards HttpResponse
                for cookie_name, cookie in six.iteritems(response.cookies):
                    cookie_kwargs = dict((
                        (key, value) for key, value in six.iteritems(cookie)
                        if key in cookie_keys and value
                    ))
                    redirect_response.set_cookie(
                        cookie_name, cookie.value, **cookie_kwargs)
                redirect_response['X-Horizon-Location'] = response['location']
                return redirect_response
            if queued_msgs:
                # TODO(gabriel): When we have an async connection to the
                # client (e.g. websockets) this should be pushed to the
                # socket queue rather than being sent via a header.
                # The header method has notable drawbacks (length limits,
                # etc.) and is not meant as a long-term solution.
                response['X-Horizon-Messages'] = json.dumps(queued_msgs)
        return response
Convert HttpResponseRedirect to HttpResponse if request is via ajax
dataset/ETHPy150Open openstack/horizon/horizon/middleware.py/HorizonMiddleware.process_response