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<?php
declare(strict_types=1);
/*
* This file is part of the TYPO3 CMS project.
*
* It is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, either version 2
* of the License, or any later version.
*
* For the full copyright and license information, please read the
* LICENSE.txt file that was distributed with this source code.
*
* The TYPO3 project - inspiring people to share!
*/
namespace TYPO3\CMS\Frontend\Middleware;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\MiddlewareInterface;
use Psr\Http\Server\RequestHandlerInterface;
use TYPO3\CMS\Frontend\Controller\TypoScriptFrontendController;
/**
* Add content-length HTTP header to the response.
*
* Notice that all Content outside the length of the content-length header will be cut off!
* Therefore content of unknown length from later-on middlewares and if admin users are logged
* in (admin panel might show...), we disable it!
*
* @internal
*/
class ContentLengthResponseHeader implements MiddlewareInterface
{
/**
* Adds the content length
*/
public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
{
$response = $handler->handle($request);
if ($GLOBALS['TSFE'] instanceof TypoScriptFrontendController) {
$context = $GLOBALS['TSFE']->getContext();
if (
(!isset($GLOBALS['TSFE']->config['config']['enableContentLengthHeader']) || $GLOBALS['TSFE']->config['config']['enableContentLengthHeader'])
&& !$context->getPropertyFromAspect('backend.user', 'isLoggedIn', false) && !$context->getPropertyFromAspect('workspace', 'isOffline', false)
) {
$response = $response->withHeader('Content-Length', (string)$response->getBody()->getSize());
}
}
return $response;
}
}