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typo3/sysext/frontend/Classes/Middleware/PreprocessRequestHook.php

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+<?php
+declare(strict_types = 1);
+namespace TYPO3\CMS\Frontend\Middleware;
+
+/*
+ * 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!
+ */
+
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+
+/**
+ * Calls a hook before processing a request for the TYPO3 Frontend.
+ *
+ * @internal
+ * @deprecated since TYPO3 v9, will be removed in TYPO3 v10.0.
+ */
+class PreprocessRequestHook implements MiddlewareInterface
+{
+
+    /**
+     * Hook to preprocess the current request
+     *
+     * @param ServerRequestInterface $request
+     * @param RequestHandlerInterface $handler
+     * @return ResponseInterface
+     */
+    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
+    {
+        // Legacy functionality to check if any hook modified global GET/POST
+        // This is a safety net, see RequestHandler for how this is validated.
+        // This information is just a compat layer which will be removed in TYPO3 v10.0.
+        $request = $request->withAttribute('_originalGetParameters', $_GET);
+        if ($request->getMethod() === 'POST') {
+            $request = $request->withAttribute('_originalPostParameters', $_POST);
+        }
+        // Set original parameters
+        if (!empty($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/index_ts.php']['preprocessRequest'])) {
+            trigger_error('The "preprocessRequest" hook will be removed in TYPO3 v10.0 in favor of PSR-15. Use a middleware instead.', E_USER_DEPRECATED);
+            foreach ($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/index_ts.php']['preprocessRequest'] as $hookFunction) {
+                $hookParameters = [];
+                GeneralUtility::callUserFunction($hookFunction, $hookParameters, $hookParameters);
+            }
+        }
+        return $handler->handle($request);
+    }
+}