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

   1 <?php
   2 declare(strict_types = 1);
   3 namespace TYPO3\CMS\Frontend\Middleware;
   4
   5 /*
   6  * This file is part of the TYPO3 CMS project.
   7  *
   8  * It is free software; you can redistribute it and/or modify it under
   9  * the terms of the GNU General Public License, either version 2
  10  * of the License, or any later version.
  11  *
  12  * For the full copyright and license information, please read the
  13  * LICENSE.txt file that was distributed with this source code.
  14  *
  15  * The TYPO3 project - inspiring people to share!
  16  */
  17
  18 use Psr\Http\Message\ResponseInterface;
  19 use Psr\Http\Message\ServerRequestInterface;
  20 use Psr\Http\Server\MiddlewareInterface;
  21 use Psr\Http\Server\RequestHandlerInterface;
  22 use TYPO3\CMS\Core\Authentication\BackendUserAuthentication;
  23 use TYPO3\CMS\Core\Context\Context;
  24 use TYPO3\CMS\Core\Context\UserAspect;
  25 use TYPO3\CMS\Core\Context\WorkspaceAspect;
  26 use TYPO3\CMS\Core\Type\Bitmask\Permission;
  27 use TYPO3\CMS\Core\Utility\GeneralUtility;
  28 use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
  29
  30 /**
  31  * Process the ID, type and other parameters.
  32  * After this point we have an array, TSFE->page, which is the page-record of the current page, $TSFE->id.
  33  *
  34  * Now, if there is a backend user logged in and he has NO access to this page,
  35  * then re-evaluate the id shown!
  36  */
  37 class PageResolver implements MiddlewareInterface
  38 {
  39     /**
  40      * Resolve the page ID
  41      *
  42      * @param ServerRequestInterface $request
  43      * @param RequestHandlerInterface $handler
  44      * @return ResponseInterface
  45      */
  46     public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
  47     {
  48         $GLOBALS['TSFE']->siteScript = $request->getAttribute('normalizedParams')->getSiteScript();
  49         $this->checkAlternativeIdMethods($GLOBALS['TSFE']);
  50         $GLOBALS['TSFE']->determineId();
  51
  52         // No access? Then remove user & Re-evaluate the page-id
  53         if ($GLOBALS['TSFE']->isBackendUserLoggedIn() && !$GLOBALS['BE_USER']->doesUserHaveAccess($GLOBALS['TSFE']->page, Permission::PAGE_SHOW)) {
  54             unset($GLOBALS['BE_USER']);
  55             // Register an empty backend user as aspect
  56             $this->setBackendUserAspect(GeneralUtility::makeInstance(Context::class), null);
  57             $this->checkAlternativeIdMethods($GLOBALS['TSFE']);
  58             $GLOBALS['TSFE']->determineId();
  59         }
  60
  61         // Evaluate the cache hash parameter
  62         $GLOBALS['TSFE']->makeCacheHash();
  63
  64         return $handler->handle($request);
  65     }
  66
  67     /**
  68      * Provides ways to bypass the '?id=[xxx]&type=[xx]' format, using either PATH_INFO or Server Rewrites
  69      *
  70      * Two options:
  71      * 1) Use PATH_INFO (also Apache) to extract id and type from that var. Does not require any special modules compiled with apache. (less typical)
  72      * 2) Using hook which enables features like those provided from "realurl" extension (AKA "Speaking URLs")
  73      *
  74      * @param TypoScriptFrontendController $tsfe
  75      */
  76     protected function checkAlternativeIdMethods(TypoScriptFrontendController $tsfe)
  77     {
  78         // Call post processing function for custom URL methods.
  79         $_params = ['pObj' => &$tsfe];
  80         foreach ($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/class.tslib_fe.php']['checkAlternativeIdMethods-PostProc'] ?? [] as $_funcRef) {
  81             GeneralUtility::callUserFunction($_funcRef, $_params, $tsfe);
  82         }
  83     }
  84
  85     /**
  86      * Register the backend user as aspect
  87      *
  88      * @param Context $context
  89      * @param BackendUserAuthentication $user
  90      */
  91     protected function setBackendUserAspect(Context $context, BackendUserAuthentication $user = null)
  92     {
  93         $context->setAspect('backend.user', GeneralUtility::makeInstance(UserAspect::class, $user));
  94         $context->setAspect('workspace', GeneralUtility::makeInstance(WorkspaceAspect::class, $user ? $user->workspace : 0));
  95     }
  96 }