PublicUrlPrefixer.php

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<?php
 
declare(strict_types=1);
 
/*
 * 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\Resource;
 
use ‪TYPO3\CMS\Core\Resource\Event\GeneratePublicUrlForResourceEvent;
use ‪TYPO3\CMS\Core\Resource\ResourceInterface;
use ‪TYPO3\CMS\Core\Utility\PathUtility;
use ‪TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
 
class ‪PublicUrlPrefixer
{
    private static bool ‪$isProcessingUrl = false;
 
    public function ‪prefixWithAbsRefPrefix(‪GeneratePublicUrlForResourceEvent $event): void
    {
        $controller = $this->‪getCurrentFrontendController();
        if (self::$isProcessingUrl || !$controller) {
            return;
        }
        $resource = $event->‪getResource();
        if (!$this->‪isLocalResource($resource)) {
            return;
        }
 
        // Before calling getPublicUrl, we set the static property to true to avoid to be called in a loop
        self::$isProcessingUrl = true;
        try {
            $resource = $event->‪getResource();
            $originalUrl = $event->‪getStorage()->getPublicUrl($resource);
            if (!$originalUrl || ‪PathUtility::hasProtocolAndScheme($originalUrl)) {
                return;
            }
            $event->‪setPublicUrl($controller->absRefPrefix . $originalUrl);
        } finally {
            self::$isProcessingUrl = false;
        }
    }
 
    private function ‪isLocalResource(‪ResourceInterface $resource): bool
    {
        return $resource->‪getStorage()->getDriverType() === 'Local';
    }
 
    private function ‪getCurrentFrontendController(): ?‪TypoScriptFrontendController
    {
        return ‪$GLOBALS['TSFE'] ?? null;
    }
}