Newscoop\GimmeBundle\EventListener\AllowOriginListener::onResponse PHP Method

    public function onResponse(FilterResponseEvent $event)
    {
        if (HttpKernelInterface::MASTER_REQUEST !== $event->getRequestType()) {
            return;
        }
        $response = $event->getResponse();
        $request = $event->getRequest();
        // HACK: revert exception status code to main request (i have no idea why it's chnaged to 500)
        if (is_array($content = json_decode($response->getContent(), true))) {
            if (array_key_exists('errors', $content)) {
                if (isset($content['errors'][0]['code'])) {
                    $response->setStatusCode($content['errors'][0]['code'], $content['errors'][0]['message']);
                }
            }
        }
        if (!$this->container->hasParameter('newscoop.gimme.allow_origin')) {
            return false;
        }
        $allowedHosts = $this->container->getParameter('newscoop.gimme.allow_origin');
        if (count($allowedHosts) == 0) {
            return false;
        }
        $allowedMethods = array('POST', 'GET', 'PUT', 'DELETE', 'LINK', 'UNLINK', 'PATCH', 'OPTIONS');
        if (preg_match('/Firefox/', $request->headers->get('user-agent'))) {
            foreach ($allowedMethods as $method) {
                $allowedMethods[] = ucfirst(strtolower($method));
            }
        }
        $response->headers->set('Access-Control-Allow-Methods', implode(', ', $allowedMethods));
        $response->headers->set('Access-Control-Expose-Headers', 'X-Location, X-Debug');
        if (in_array('*', $allowedHosts)) {
            $response->headers->set('Access-Control-Allow-Origin', '*');
        } else {
            foreach ($allowedHosts as $host) {
                if ($request->server->get('HTTP_ORIGIN') == $host) {
                    $response->headers->set('Access-Control-Allow-Origin', $host);
                }
            }
        }
        $event->setResponse($response);
    }