<?php

namespace M6Web\Bundle\FirewallBundle\EventListener;

use Symfony\Component\HttpKernel\Bundle\Bundle;
use Symfony\Component\HttpKernel\Event\GetResponseEvent;
use Symfony\Component\HttpKernel\HttpKernelInterface;
use M6Web\Bundle\FirewallBundle\Firewall\ProviderInterface;

/**
 * class RequestListener
 */
class RequestListener extends Bundle
{
    /**
    * firewall provider
    */
    protected $provider;

    /**
    * @param provider $provider firewall provider
    */
    public function __construct(ProviderInterface $provider)
    {
        $this->provider = $provider;
    }

    /**
    * on request event
    * @param GetResponseEvent $event event
    */
    public function onRequest(GetResponseEvent $event)
    {
        if (HttpKernelInterface::MASTER_REQUEST !== $event->getRequestType()) {
            return;
        }
        $patterns = $this->provider->getPatterns();
        if ($patterns) {
            foreach ($patterns as $pattern) {
                if ($pattern['matcher']->matches($event->getRequest())) {
                   $firewall = $this->provider->getFirewall($pattern['config']);
                   $firewall->handle();
                }
            }
        }
    }

}

<?php

namespace M6Web\Bundle\FirewallBundle\EventListener;

use Symfony\Component\HttpKernel\Bundle\Bundle;
use Symfony\Component\HttpKernel\Event\GetResponseEvent;
use M6Web\Bundle\FirewallBundle\Firewall\ProviderInterface;

/**
 * class RequestListener
 */
class RequestListener extends Bundle
{
    /**
    * firewall provider
    */
    protected $provider;

    /**
    * @param provider $provider firewall provider
    */
    public function __construct(ProviderInterface $provider)
    {
        $this->provider = $provider;
    }

    /**
    * on request event
    * @param GetResponseEvent $event event
    */
    public function onRequest(GetResponseEvent $event)
    {
        $patterns = $this->provider->getPatterns();
        if ($patterns) {
            foreach ($patterns as $pattern) {
                if ($pattern['matcher']->matches($event->getRequest())) {
                   $firewall = $this->provider->getFirewall($pattern['config']);
                   $firewall->handle();
                }
            }
        }
    }

}

--- 
+++ 
@@ -4,6 +4,7 @@
 
 use Symfony\Component\HttpKernel\Bundle\Bundle;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
+use Symfony\Component\HttpKernel\HttpKernelInterface;
 use M6Web\Bundle\FirewallBundle\Firewall\ProviderInterface;
 
 /**
@@ -30,6 +31,9 @@
     */
     public function onRequest(GetResponseEvent $event)
     {
+        if (HttpKernelInterface::MASTER_REQUEST !== $event->getRequestType()) {
+            return;
+        }
         $patterns = $this->provider->getPatterns();
         if ($patterns) {
             foreach ($patterns as $pattern) {
Check patterns only on master request