<?php
declare(strict_types=1);
/*
* This file is part of the Nelmio SecurityBundle.
*
* (c) Nelmio <hello@nelm.io>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Nelmio\SecurityBundle\EventListener;
use Symfony\Component\HttpKernel\Event\ResponseEvent;
use Symfony\Component\HttpKernel\KernelEvents;
final class ClickjackingListener extends AbstractContentTypeRestrictableListener
{
use KernelEventForwardCompatibilityTrait;
/**
* @var array<string, array<string, string>>
*/
private array $paths;
private ?string $hosts;
/**
* @param array<string, array<string, string>> $paths
* @param list<string> $contentTypes
* @param list<string> $hosts
*/
public function __construct(array $paths, array $contentTypes = [], array $hosts = [])
{
parent::__construct($contentTypes);
$this->paths = $paths;
$this->hosts = [] !== $hosts ? '('.implode('|', $hosts).')' : null;
}
public static function getSubscribedEvents(): array
{
return [KernelEvents::RESPONSE => 'onKernelResponse'];
}
public function onKernelResponse(ResponseEvent $e): void
{
if (!$this->isMainRequest($e)) {
return;
}
if (!$this->isContentTypeValid($e->getResponse())) {
return;
}
$response = $e->getResponse();
if ($response->isRedirection()) {
return;
}
if ($response->headers->has('X-Frame-Options')) {
// Do not overwrite an existing header
return;
}
$request = $e->getRequest();
$host = '' === $request->getHost() ? '/' : $request->getHost();
// skip non-listed hosts
if (null !== $this->hosts && 1 !== preg_match('{'.$this->hosts.'}i', $host)) {
return;
}
$currentPath = '' === $request->getRequestUri() ? '/' : $request->getRequestUri();
foreach ($this->paths as $path => $options) {
if (1 === preg_match('{'.$path.'}i', $currentPath)) {
if ('ALLOW' === $options['header']) {
$response->headers->remove('X-Frame-Options');
} else {
$response->headers->set('X-Frame-Options', $options['header']);
}
return;
}
}
}
}