typo3/sysext/backend/Classes/Http/Application.php

   1 <?php
   2 namespace TYPO3\CMS\Backend\Http;
   3
   4 /*
   5  * This file is part of the TYPO3 CMS project.
   6  *
   7  * It is free software; you can redistribute it and/or modify it under
   8  * the terms of the GNU General Public License, either version 2
   9  * of the License, or any later version.
  10  *
  11  * For the full copyright and license information, please read the
  12  * LICENSE.txt file that was distributed with this source code.
  13  *
  14  * The TYPO3 project - inspiring people to share!
  15  */
  16 use TYPO3\CMS\Core\Core\ApplicationInterface;
  17 use TYPO3\CMS\Core\Core\Bootstrap;
  18
  19 /**
  20  * Entry point for the TYPO3 Backend (HTTP requests)
  21  */
  22 class Application implements ApplicationInterface
  23 {
  24     /**
  25      * @var Bootstrap
  26      */
  27     protected $bootstrap;
  28
  29     /**
  30      * Number of subdirectories where the entry script is located, relative to PATH_site
  31      * Usually this is equal to PATH_site = 0
  32      * @var int
  33      */
  34     protected $entryPointLevel = 1;
  35
  36     /**
  37      * @var \Psr\Http\Message\ServerRequestInterface
  38      */
  39     protected $request;
  40
  41     /**
  42      * All available request handlers that can handle backend requests (non-CLI)
  43      * @var array
  44      */
  45     protected $availableRequestHandlers = [
  46         \TYPO3\CMS\Backend\Http\RequestHandler::class,
  47         \TYPO3\CMS\Backend\Http\BackendModuleRequestHandler::class,
  48         \TYPO3\CMS\Backend\Http\AjaxRequestHandler::class
  49     ];
  50
  51     /**
  52      * Constructor setting up legacy constant and register available Request Handlers
  53      *
  54      * @param \Composer\Autoload\ClassLoader $classLoader an instance of the class loader
  55      */
  56     public function __construct($classLoader)
  57     {
  58         $this->defineLegacyConstants();
  59
  60         $this->bootstrap = Bootstrap::getInstance()
  61             ->initializeClassLoader($classLoader)
  62             ->setRequestType(TYPO3_REQUESTTYPE_BE | (isset($_REQUEST['route']) && strpos($_REQUEST['route'], '/ajax/') === 0 ? TYPO3_REQUESTTYPE_AJAX : 0))
  63             ->baseSetup($this->entryPointLevel);
  64
  65         // Redirect to install tool if base configuration is not found
  66         if (!$this->bootstrap->checkIfEssentialConfigurationExists()) {
  67             $this->bootstrap->redirectToInstallTool($this->entryPointLevel);
  68         }
  69
  70         foreach ($this->availableRequestHandlers as $requestHandler) {
  71             $this->bootstrap->registerRequestHandlerImplementation($requestHandler);
  72         }
  73
  74         $this->bootstrap->configure();
  75     }
  76
  77     /**
  78      * Set up the application and shut it down afterwards
  79      *
  80      * @param callable $execute
  81      */
  82     public function run(callable $execute = null)
  83     {
  84         $this->request = \TYPO3\CMS\Core\Http\ServerRequestFactory::fromGlobals();
  85         if (isset($this->request->getQueryParams()['M'])) {
  86             $this->request = $this->request->withAttribute('isModuleRequest', true);
  87         }
  88
  89         $this->bootstrap->handleRequest($this->request);
  90
  91         if ($execute !== null) {
  92             call_user_func($execute);
  93         }
  94
  95         $this->bootstrap->shutdown();
  96     }
  97
  98     /**
  99      * Define constants and variables
 100      */
 101     protected function defineLegacyConstants()
 102     {
 103         define('TYPO3_MODE', 'BE');
 104     }
 105 }