ot_typo3/ot_router/Classes/Middleware/Router.php

<?php
namespace Opentalent\OtRouter\Middleware;

use Opentalent\OtRouter\Routing\Resolver;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\MiddlewareInterface;
use Psr\Http\Server\RequestHandlerInterface;
use TYPO3\CMS\Core\Utility\GeneralUtility;
use TYPO3\CMS\Extbase\Object\ObjectManager;

/**
 * Hooks into the frontend request and use the index table to resolve a page uid
 *
 * @internal
 */
class Router implements MiddlewareInterface
{
    /**
     *
     * @param ServerRequestInterface $request
     * @param RequestHandlerInterface $handler
     * @return ResponseInterface
     */
    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
    {
        $uri = $request->getUri();

        $resolver = GeneralUtility::makeInstance(ObjectManager::class)->get(Resolver::class);

        $pageUid = $resolver->getPageUid(
            $uri->getHost(),
            $uri->getPath(),
        );

        // just pass the plate to the next middleware...
        return $handler->handle($request);
    }
}