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<?php
/*
* This file is part of the TYPO3 CMS project.
*
* It is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, either version 2
* of the License, or any later version.
*
* For the full copyright and license information, please read the
* LICENSE.txt file that was distributed with this source code.
*
* The TYPO3 project - inspiring people to share!
*/
namespace TYPO3\CMS\Frontend\Cache;
/**
* Substitutes a cached nonce value with the actual nonce value that
* is valid for the current request, and which is issued as HTTP CSP
* header during the frontend rendering process.
*/
class NonceValueSubstitution
{
/**
* @param array{content: string, nonce: string} $context
*/
public function substituteNonce(array $context): ?string
{
$currentNonce = $GLOBALS['TYPO3_REQUEST']?->getAttribute('nonce')?->value ?? '';
if (empty($currentNonce) || empty($context['content']) || empty($context['nonce'])) {
return null;
}
return str_replace($context['nonce'], $currentNonce, $context['content']);
}
}