Nelmio\SecurityBundle\EventListener\ContentSecurityPolicyListener::onKernelResponse PHP Метод

    public function onKernelResponse(FilterResponseEvent $e)
    {
        if (HttpKernelInterface::MASTER_REQUEST !== $e->getRequestType()) {
            return;
        }
        $request = $e->getRequest();
        $response = $e->getResponse();
        if ($response->isRedirection()) {
            $this->nonce = null;
            $this->sha = null;
            return;
        }
        if ((empty($this->hosts) || in_array($e->getRequest()->getHost(), $this->hosts, true)) && $this->isContentTypeValid($response)) {
            $signatures = $this->sha;
            if ($this->nonce) {
                $signatures['script-src'][] = 'nonce-' . $this->nonce;
                $signatures['style-src'][] = 'nonce-' . $this->nonce;
            }
            $response->headers->add($this->buildHeaders($request, $this->report, true, $this->compatHeaders, $signatures));
            $response->headers->add($this->buildHeaders($request, $this->enforce, false, $this->compatHeaders, $signatures));
        }
        $this->nonce = null;
        $this->sha = null;
    }

 protected function callListener(ContentSecurityPolicyListener $listener, $path, $masterReq, $contentType = 'text/html', array $digestData = array(), $getNonce = 0)
 {
     $request = Request::create($path);
     $event = new GetResponseEvent($this->kernel, $request, $masterReq ? HttpKernelInterface::MASTER_REQUEST : HttpKernelInterface::SUB_REQUEST);
     $listener->onKernelRequest($event);
     if (isset($digestData['scripts'])) {
         foreach ($digestData['scripts'] as $script) {
             $listener->addScript($script);
         }
     }
     if (isset($digestData['styles'])) {
         foreach ($digestData['styles'] as $style) {
             $listener->addStyle($style);
         }
     }
     if (isset($digestData['signatures'])) {
         foreach ($digestData['signatures'] as $type => $values) {
             foreach ($values as $value) {
                 $listener->addSha($type, $value);
             }
         }
     }
     for ($i = 0; $i < $getNonce; ++$i) {
         $listener->getNonce();
     }
     $response = new Response();
     $response->headers->add(array('content-type' => $contentType));
     $event = new FilterResponseEvent($this->kernel, $request, $masterReq ? HttpKernelInterface::MASTER_REQUEST : HttpKernelInterface::SUB_REQUEST, $response);
     $listener->onKernelResponse($event);
     return $response;
 }