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\Database\ConnectionPool;
  27 use TYPO3\CMS\Core\Database\Query\Restriction\DeletedRestriction;
  28 use TYPO3\CMS\Core\Database\Query\Restriction\FrontendWorkspaceRestriction;
  29 use TYPO3\CMS\Core\Routing\PageArguments;
  30 use TYPO3\CMS\Core\Routing\RouteNotFoundException;
  31 use TYPO3\CMS\Core\Routing\SiteRouteResult;
  32 use TYPO3\CMS\Core\Site\Entity\Site;
  33 use TYPO3\CMS\Core\Site\Entity\SiteInterface;
  34 use TYPO3\CMS\Core\Site\Entity\SiteLanguage;
  35 use TYPO3\CMS\Core\Type\Bitmask\Permission;
  36 use TYPO3\CMS\Core\Utility\GeneralUtility;
  37 use TYPO3\CMS\Core\Utility\MathUtility;
  38 use TYPO3\CMS\Frontend\Controller\ErrorController;
  39 use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
  40 use TYPO3\CMS\Frontend\Page\PageAccessFailureReasons;
  41
  42 /**
  43  * Process the ID, type and other parameters.
  44  * After this point we have an array, TSFE->page, which is the page-record of the current page, $TSFE->id.
  45  *
  46  * Now, if there is a backend user logged in and he has NO access to this page,
  47  * then re-evaluate the id shown!
  48  */
  49 class PageResolver implements MiddlewareInterface
  50 {
  51     /**
  52      * @var TypoScriptFrontendController
  53      */
  54     protected $controller;
  55
  56     public function __construct(TypoScriptFrontendController $controller = null)
  57     {
  58         $this->controller = $controller ?? $GLOBALS['TSFE'];
  59     }
  60
  61     /**
  62      * Resolve the page ID
  63      *
  64      * @param ServerRequestInterface $request
  65      * @param RequestHandlerInterface $handler
  66      * @return ResponseInterface
  67      */
  68     public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
  69     {
  70         // First, resolve the root page of the site, the Page ID of the current domain
  71         if (($site = $request->getAttribute('site', null)) instanceof SiteInterface) {
  72             $this->controller->domainStartPage = $site->getRootPageId();
  73         }
  74         $language = $request->getAttribute('language', null);
  75
  76         $hasSiteConfiguration = $language instanceof SiteLanguage && $site instanceof Site;
  77
  78         // Resolve the page ID based on TYPO3's native routing functionality
  79         if ($hasSiteConfiguration) {
  80             /** @var SiteRouteResult $previousResult */
  81             $previousResult = $request->getAttribute('routing', null);
  82             if (!$previousResult) {
  83                 return GeneralUtility::makeInstance(ErrorController::class)->pageNotFoundAction(
  84                     $request,
  85                     'The requested page does not exist',
  86                     ['code' => PageAccessFailureReasons::PAGE_NOT_FOUND]
  87                 );
  88             }
  89
  90             $requestId = (string)($request->getQueryParams()['id'] ?? '');
  91             if (!empty($requestId) && !empty($page = $this->resolvePageId($requestId))) {
  92                 // Legacy URIs (?id=12345) takes precedence, not matter if a route is given
  93                 $pageArguments = new PageArguments(
  94                     (int)($page['l10n_parent'] ?: $page['uid']),
  95                     (string)($request->getQueryParams()['type'] ?? '0'),
  96                     [],
  97                     [],
  98                     $request->getQueryParams()
  99                 );
 100             } else {
 101                 // Check for the route
 102                 try {
 103                     $pageArguments = $site->getRouter()->matchRequest($request, $previousResult);
 104                 } catch (RouteNotFoundException $e) {
 105                     return GeneralUtility::makeInstance(ErrorController::class)->pageNotFoundAction(
 106                         $request,
 107                         'The requested page does not exist',
 108                         ['code' => PageAccessFailureReasons::PAGE_NOT_FOUND]
 109                     );
 110                 }
 111             }
 112             if (!$pageArguments->getPageId()) {
 113                 return GeneralUtility::makeInstance(ErrorController::class)->pageNotFoundAction(
 114                     $request,
 115                     'The requested page does not exist',
 116                     ['code' => PageAccessFailureReasons::PAGE_NOT_FOUND]
 117                 );
 118             }
 119
 120             $this->controller->id = $pageArguments->getPageId();
 121             $this->controller->type = $pageArguments->getPageType() ?? $this->controller->type;
 122             $request = $request->withAttribute('routing', $pageArguments);
 123             // stop in case arguments are dirty (=defined twice in route and GET query parameters)
 124             if ($pageArguments->areDirty()) {
 125                 return GeneralUtility::makeInstance(ErrorController::class)->pageNotFoundAction(
 126                     $request,
 127                     'The requested URL is not distinct',
 128                     ['code' => PageAccessFailureReasons::PAGE_NOT_FOUND]
 129                 );
 130             }
 131
 132             // merge the PageArguments with the request query parameters
 133             $queryParams = array_replace_recursive($request->getQueryParams(), $pageArguments->getArguments());
 134             $request = $request->withQueryParams($queryParams);
 135             $this->controller->setPageArguments($pageArguments);
 136
 137             // At this point, we later get further route modifiers
 138             // for bw-compat we update $GLOBALS[TYPO3_REQUEST] to be used later in TSFE.
 139             $GLOBALS['TYPO3_REQUEST'] = $request;
 140         } else {
 141             // old-school page resolving for realurl, cooluri etc.
 142             $this->controller->siteScript = $request->getAttribute('normalizedParams')->getSiteScript();
 143         }
 144
 145         $this->controller->determineId();
 146
 147         // No access? Then remove user & Re-evaluate the page-id
 148         if ($this->controller->isBackendUserLoggedIn() && !$GLOBALS['BE_USER']->doesUserHaveAccess($this->controller->page, Permission::PAGE_SHOW)) {
 149             unset($GLOBALS['BE_USER']);
 150             // Register an empty backend user as aspect
 151             $this->setBackendUserAspect(GeneralUtility::makeInstance(Context::class), null);
 152             $this->controller->determineId();
 153         }
 154
 155         return $handler->handle($request);
 156     }
 157
 158     /**
 159      * @param string $pageId
 160      * @return array|null
 161      */
 162     protected function resolvePageId(string $pageId): ?array
 163     {
 164         $queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)
 165             ->getQueryBuilderForTable('pages');
 166         $queryBuilder
 167             ->getRestrictions()
 168             ->removeAll()
 169             ->add(GeneralUtility::makeInstance(DeletedRestriction::class))
 170             ->add(GeneralUtility::makeInstance(FrontendWorkspaceRestriction::class));
 171
 172         if (MathUtility::canBeInterpretedAsInteger($pageId)) {
 173             $constraint = $queryBuilder->expr()->eq(
 174                 'uid',
 175                 $queryBuilder->createNamedParameter($pageId, \PDO::PARAM_INT)
 176             );
 177         } else {
 178             $constraint = $queryBuilder->expr()->eq(
 179                 'alias',
 180                 $queryBuilder->createNamedParameter($pageId, \PDO::PARAM_STR)
 181             );
 182         }
 183
 184         $statement = $queryBuilder
 185             ->select('uid', 'l10n_parent', 'pid')
 186             ->from('pages')
 187             ->where($constraint)
 188             ->execute();
 189
 190         $page = $statement->fetch();
 191         if (empty($page)) {
 192             return null;
 193         }
 194         return $page;
 195     }
 196
 197     /**
 198      * Register the backend user as aspect
 199      *
 200      * @param Context $context
 201      * @param BackendUserAuthentication $user
 202      */
 203     protected function setBackendUserAspect(Context $context, BackendUserAuthentication $user = null)
 204     {
 205         $context->setAspect('backend.user', GeneralUtility::makeInstance(UserAspect::class, $user));
 206         $context->setAspect('workspace', GeneralUtility::makeInstance(WorkspaceAspect::class, $user ? $user->workspace : 0));
 207     }
 208 }