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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\Core\Authentication\BackendUserAuthentication;
use TYPO3\CMS\Core\Http\RedirectResponse;
use TYPO3\CMS\Core\Routing\SiteRouteResult;
use TYPO3\CMS\Core\Site\Entity\Site;
use TYPO3\CMS\Core\Site\Entity\SiteLanguage;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Frontend\Controller\ErrorController;
use TYPO3\CMS\Frontend\Page\PageAccessFailureReasons;
/**
* Resolves redirects of site if base is not /
* Can be replaced or extended by extensions if GeoIP-based or user-agent based language redirects need to happen.
*
* Please note that the redirect usually does not contain the Query Parameters, as special query parameters
* like "id", "L" and "cHash" could then result in an error loop.
* One special case (adding a "/") is keeping the query parameters though.
*/
class SiteBaseRedirectResolver implements MiddlewareInterface
{
/**
* Redirect to default language if required
*/
public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
{
$site = $request->getAttribute('site', null);
$language = $request->getAttribute('language', null);
$routeResult = $request->getAttribute('routing', null);
// Usually called when "https://www.example.com" was entered, but all sites have "https://www.example.com/lang-key/"
// So a redirect to the first possible language is done.
if ($site instanceof Site && !($language instanceof SiteLanguage)) {
if ($routeResult instanceof SiteRouteResult && $routeResult->getTail() === '') {
$language = $site->getDefaultLanguage();
if ($language->isEnabled()) {
return new RedirectResponse($language->getBase(), 307);
}
// Default language is disabled, check for the first (enabled) language in list to redirect to that
foreach ($site->getLanguages() as $language) {
return new RedirectResponse($language->getBase(), 307);
}
}
return GeneralUtility::makeInstance(ErrorController::class)->pageNotFoundAction(
$request,
'The requested page does not exist',
['code' => PageAccessFailureReasons::PAGE_NOT_FOUND]
);
}
// Language is found, and hidden but also not visible to the BE user, this needs to fail
if ($language instanceof SiteLanguage && !$this->isLanguageEnabled($language, $GLOBALS['BE_USER'] ?? null)) {
return GeneralUtility::makeInstance(ErrorController::class)->pageNotFoundAction(
$request,
'Page is not available in the requested language.',
['code' => PageAccessFailureReasons::LANGUAGE_NOT_AVAILABLE]
);
}
if ($language instanceof SiteLanguage && $routeResult instanceof SiteRouteResult) {
$requestedUri = $request->getUri();
$tail = $routeResult->getTail();
// a URL was called via "/fr-FR/" but the page is actually called "/fr-FR", let's do a redirect
if ($tail === '/') {
$uri = $requestedUri->withPath(rtrim($requestedUri->getPath(), '/'));
return new RedirectResponse($uri, 307);
}
}
return $handler->handle($request);
}
/**
* Checks if the language is allowed in Frontend, if not, check if there is valid BE user
*/
protected function isLanguageEnabled(SiteLanguage $language, ?BackendUserAuthentication $user = null): bool
{
// language is hidden, check if a possible backend user is allowed to access the language
if ($language->enabled() || $user?->checkLanguageAccess($language->getLanguageId())) {
return true;
}
return false;
}
}