[TASK] Initial Commit

Classes/Middleware/SlashForcer.php

@@ -0,0 +1,77 @@
+<?php
+
+declare(strict_types=1);
+
+namespace B13\SlashForce\Middleware;
+
+/*
+ * This file is part of TYPO3 CMS-based extension "slash_forcer" by b13.
+ *
+ * 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.
+ */
+
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+use TYPO3\CMS\Core\Http\RedirectResponse;
+use TYPO3\CMS\Core\Routing\PageArguments;
+use TYPO3\CMS\Core\Site\Entity\Site;
+
+class SlashForcer implements MiddlewareInterface
+{
+    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
+    {
+        if ($request->getMethod() !== 'GET' && $request->getMethod() !== 'HEAD') {
+            return $handler->handle($request);
+        }
+
+        $site = $request->getAttribute('site');
+
+        if (!$site instanceof Site) {
+            return $handler->handle($request);
+        }
+
+        $uri = $request->getUri();
+        if (str_ends_with($uri->getPath(), '/')) {
+            return $handler->handle($request);
+        }
+
+        if (!$this->siteHasSlashConfiguredForCurrentPageType($site, $request)) {
+            return $handler->handle($request);
+        }
+
+        return new RedirectResponse($uri->withPath($uri->getPath() . '/'));
+    }
+
+    private function siteHasSlashConfiguredForCurrentPageType(Site $site, ServerRequestInterface $request): bool
+    {
+        $pageArguments = $request->getAttribute('routing');
+        if (!$pageArguments instanceof PageArguments) {
+            return false;
+        }
+
+        $pageType = $pageArguments['pageType'] ?? null;
+        if ($pageType === null) {
+            return false;
+        }
+        $routeEnhancers = $site->getConfiguration()['routeEnhancers'] ?? null;
+        if ($routeEnhancers === null) {
+            return false;
+        }
+
+        $pageTypeSuffix = $routeEnhancers['PageTypeSuffix'] ?? null;
+        if ($pageTypeSuffix === null) {
+            return false;
+        }
+
+        $map = $pageTypeSuffix['map'] ?? null;
+        if ($map === null) {
+            return false;
+        }
+
+        return (array_flip($map)[(int)$pageType] ?? null) === '/' || (array_flip($map)[$pageType] ?? null) === '/';
+    }
+}

Configuration/RequestMiddlewares.php

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+<?php
+
+return [
+    'frontend' => [
+        'b13/slash_force/slash-forcer' => [
+            'target' => \B13\SlashForce\Middleware\SlashForcer::class,
+            'before' => [
+                'typo3/cms-workspaces/preview-permissions',
+                'typo3/cms-frontend/tsfe',
+            ],
+            'after' => [
+                'typo3/cms-frontend/page-resolver',
+                'typo3/cms-frontend/page-argument-validator',
+            ],
+        ],
+    ],
+];