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