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 = $request->getAttribute('normalizedParams')->getSiteScript();
 143             if (!empty($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/class.tslib_fe.php']['checkAlternativeIdMethods-PostProc'])) {
 144                 trigger_error('The "checkAlternativeIdMethods-PostProc" hook will be removed in TYPO3 v10.0 in favor of PSR-15. Use a middleware instead.', E_USER_DEPRECATED);
 145                 $this->checkAlternativeIdMethods($this->controller);
 146             }
 147         }
 148
 149         $this->controller->determineId();
 150
 151         // No access? Then remove user & Re-evaluate the page-id
 152         if ($this->controller->isBackendUserLoggedIn() && !$GLOBALS['BE_USER']->doesUserHaveAccess($this->controller->page, Permission::PAGE_SHOW)) {
 153             unset($GLOBALS['BE_USER']);
 154             // Register an empty backend user as aspect
 155             $this->setBackendUserAspect(GeneralUtility::makeInstance(Context::class), null);
 156             if (!$hasSiteConfiguration) {
 157                 $this->checkAlternativeIdMethods($this->controller);
 158             }
 159             $this->controller->determineId();
 160         }
 161
 162         return $handler->handle($request);
 163     }
 164
 165     /**
 166      * Provides ways to bypass the '?id=[xxx]&type=[xx]' format, using either PATH_INFO or Server Rewrites
 167      *
 168      * Two options:
 169      * 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)
 170      * 2) Using hook which enables features like those provided from "realurl" extension (AKA "Speaking URLs")
 171      *
 172      * @param TypoScriptFrontendController $tsfe
 173      */
 174     protected function checkAlternativeIdMethods(TypoScriptFrontendController $tsfe)
 175     {
 176         // Call post processing function for custom URL methods.
 177         $_params = ['pObj' => &$tsfe];
 178         foreach ($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['tslib/class.tslib_fe.php']['checkAlternativeIdMethods-PostProc'] ?? [] as $_funcRef) {
 179             GeneralUtility::callUserFunction($_funcRef, $_params, $tsfe);
 180         }
 181     }
 182
 183     /**
 184      * @param string $pageId
 185      * @return array|null
 186      */
 187     protected function resolvePageId(string $pageId): ?array
 188     {
 189         $queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)
 190             ->getQueryBuilderForTable('pages');
 191         $queryBuilder
 192             ->getRestrictions()
 193             ->removeAll()
 194             ->add(GeneralUtility::makeInstance(DeletedRestriction::class))
 195             ->add(GeneralUtility::makeInstance(FrontendWorkspaceRestriction::class));
 196
 197         if (MathUtility::canBeInterpretedAsInteger($pageId)) {
 198             $constraint = $queryBuilder->expr()->eq(
 199                 'uid',
 200                 $queryBuilder->createNamedParameter($pageId, \PDO::PARAM_INT)
 201             );
 202         } else {
 203             $constraint = $queryBuilder->expr()->eq(
 204                 'alias',
 205                 $queryBuilder->createNamedParameter($pageId, \PDO::PARAM_STR)
 206             );
 207         }
 208
 209         $statement = $queryBuilder
 210             ->select('uid', 'l10n_parent', 'pid')
 211             ->from('pages')
 212             ->where($constraint)
 213             ->execute();
 214
 215         $page = $statement->fetch();
 216         if (empty($page)) {
 217             return null;
 218         }
 219         return $page;
 220     }
 221
 222     /**
 223      * Register the backend user as aspect
 224      *
 225      * @param Context $context
 226      * @param BackendUserAuthentication $user
 227      */
 228     protected function setBackendUserAspect(Context $context, BackendUserAuthentication $user = null)
 229     {
 230         $context->setAspect('backend.user', GeneralUtility::makeInstance(UserAspect::class, $user));
 231         $context->setAspect('workspace', GeneralUtility::makeInstance(WorkspaceAspect::class, $user ? $user->workspace : 0));
 232     }
 233 }