Action to pure cache from gateway in symfony

IndexController.php

 <?php
/**
* @param Request $request
* @param string $subdomain
* @return Response
*/
public function purecacheAction(Request $request, $subdomain)
{
     $servers = array('127.0.0.1'); // Port 80 assumed for 10.0.0.1
     $client = new Symfony($servers, 'http://your-url.com');
     $client->purge('/')->flush();

     return new Response();
}