typo3/sysext/frontend/Classes/Middleware/ContentLengthResponseHeader.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\Http\NullResponse;
  23 use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
  24
  25 /**
  26  * Send content-length header.
  27  * Notice that all HTML content outside the length of the content-length header will be cut off!
  28  * Therefore content of unknown length from included PHP-scripts and if admin users are logged
  29  * in (admin panel might show...) or if debug mode is turned on, we disable it!
  30  *
  31  * @internal
  32  */
  33 class ContentLengthResponseHeader implements MiddlewareInterface
  34 {
  35
  36     /**
  37      * Adds the content length
  38      *
  39      * @param ServerRequestInterface $request
  40      * @param RequestHandlerInterface $handler
  41      * @return ResponseInterface
  42      */
  43     public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
  44     {
  45         $response = $handler->handle($request);
  46         if (
  47             !($response instanceof NullResponse)
  48             && $GLOBALS['TSFE'] instanceof TypoScriptFrontendController
  49             && $GLOBALS['TSFE']->isOutputting()) {
  50             if (
  51                     (!isset($GLOBALS['TSFE']->config['config']['enableContentLengthHeader']) || $GLOBALS['TSFE']->config['config']['enableContentLengthHeader'])
  52                     && !$GLOBALS['TSFE']->isBackendUserLoggedIn() && !$GLOBALS['TYPO3_CONF_VARS']['FE']['debug']
  53                     && !$GLOBALS['TSFE']->config['config']['debug'] && !$GLOBALS['TSFE']->doWorkspacePreview()
  54                 ) {
  55                 $response = $response->withHeader('Content-Length', (string)$response->getBody()->getSize());
  56             }
  57         }
  58         return $response;
  59     }
  60 }