PolicyMutatedEvent

New in version 12.3.

The PSR-14 event \TYPO3\CMS\Core\Security\ContentSecurityPolicy\Event\PolicyMutatedEvent will be dispatched once all mutations have been applied to the current Content Security Policy object, just before the corresponding HTTP header is added to the HTTP response object. This allows individual adjustments for custom implementations.

Example

Registration of the event listener in the extension's Services.yaml:

EXT:my_extension/Configuration/Services.yaml
services:
  # Place here the default dependency injection configuration

  MyVendor\MyExtension\ContentSecurityPolicy\EventListener\MyEventListener:
    tags:
      - name: event.listener
        identifier: 'my-extension/mutate-policy'

Read how to configure dependency injection in extensions.

The corresponding event listener class:

EXT:my_extension/Classes/ContentSecurityPolicy/EventListener/MyEventListener.php
<?php

declare(strict_types=1);

namespace MyVendor\MyExtension\ContentSecurityPolicy\EventListener;

use TYPO3\CMS\Core\Security\ContentSecurityPolicy\Directive;
use TYPO3\CMS\Core\Security\ContentSecurityPolicy\Event\PolicyMutatedEvent;
use TYPO3\CMS\Core\Security\ContentSecurityPolicy\UriValue;

final class MyEventListener
{
    public function __invoke(PolicyMutatedEvent $event): void
    {
        if ($event->scope->type->isFrontend()) {
            // In our example, only the backend policy should be adjusted
            return;
        }

        // Allow images from example.org
        $event->getCurrentPolicy()->extend(
            Directive::ImgSrc,
            new UriValue('https://example.org/')
        );
    }
}

API

class TYPO3\CMS\Core\Security\ContentSecurityPolicy\Event\PolicyMutatedEvent
property scope
property defaultPolicy
isPropagationStopped()
Return type

bool

stopPropagation()
getCurrentPolicy()
Return type

TYPO3\CMS\Core\Security\ContentSecurityPolicy\Policy

setCurrentPolicy(TYPO3\\CMS\\Core\\Security\\ContentSecurityPolicy\\Policy $currentPolicy)
Parameters
  • $currentPolicy (TYPO3\CMS\Core\Security\ContentSecurityPolicy\Policy) -- the currentPolicy

getMutationCollections()
Return type

array

Returns

list<MutationCollection>

setMutationCollections(TYPO3\\CMS\\Core\\Security\\ContentSecurityPolicy\\MutationCollection $mutationCollections)
Parameters
  • $mutationCollections (TYPO3\CMS\Core\Security\ContentSecurityPolicy\MutationCollection) -- the mutationCollections