public function run(ServerRequestInterface $request, ResponseInterface $response)
    {
        $route = $request->getAttribute('route');        
        $file = !empty($route->file) ? ltrim($route->file, '/') : '';

        if ($file[0] === '~' || strpos($file, '..') !== false) {
            trigger_error("Won't route to '$file': '~', '..' are not allowed in filename", E_USER_NOTICE);
            return $this->notFound($request, $response);
        }
        
        if (!file_exists($file)) {
            trigger_error("Failed to route using '$file': File doesn't exist", E_USER_NOTICE);
            return $this->notFound($request, $response);
        }

        $result = $this->includeScript($file, $request, $response);

        return $result === true || $result === 1 ? $response : $result;
    }