vendor/symfony/http-kernel/EventListener/DisallowRobotsIndexingListener.php line 27
- <?php
- /*
- * This file is part of the Symfony package.
- *
- * (c) Fabien Potencier <fabien@symfony.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
- namespace Symfony\Component\HttpKernel\EventListener;
- use Symfony\Component\EventDispatcher\EventSubscriberInterface;
- use Symfony\Component\HttpKernel\Event\ResponseEvent;
- use Symfony\Component\HttpKernel\KernelEvents;
- /**
- * Ensures that the application is not indexed by search engines.
- *
- * @author Gary PEGEOT <garypegeot@gmail.com>
- */
- class DisallowRobotsIndexingListener implements EventSubscriberInterface
- {
- private const HEADER_NAME = 'X-Robots-Tag';
- public function onResponse(ResponseEvent $event): void
- {
- if (!$event->getResponse()->headers->has(static::HEADER_NAME)) {
- $event->getResponse()->headers->set(static::HEADER_NAME, 'noindex');
- }
- }
- public static function getSubscribedEvents(): array
- {
- return [
- KernelEvents::RESPONSE => ['onResponse', -255],
- ];
- }
- }