src/Core/DefaultRoute.php
public function getResponse(string &$packageRoot, Request &$request): Response
    {
        $packageRoot = rtrim($packageRoot, '/');
        $route = preg_replace('/\/\d+/u', '/D', $request->route());
        $path = $packageRoot . '/Route/' . $route . '/' . $request->method() . '.php';
        if (file_exists($path)) {
            require $path;
            $controllerClass = $request->package() . '\\Route_' . str_replace('/', '_', $route) . '\\' . $request->method();
            /**
             * @var BaseController $controller
             */
            if (class_exists($controllerClass)) {
                $controller = new $controllerClass($packageRoot, $request);
            } else {
                throw new RouteException(sprintf('Route: the class "%s" does not exist', $controllerClass));
            }

            /**
             * Call handler.
             */
            $handler = filter_input_array(INPUT_POST)['handler'] ?? filter_input_array(INPUT_GET)['handler'] ?? 'index';
            if (method_exists($controllerClass, $handler)) {
                $controller->invoke($handler);
                return $controller->getResponse();
            } else {
                throw new RouteException(sprintf('Route: the method "%s" does not exist', $handler));
            }
        } else {
            throw new RouteException(sprintf('Route: path "%s" does not exist', $request->package() . '/Route/' . $route . '/' . $request->method() . '.php'));
        }
    }
public function getResponse(string &$packageRoot, Request &$request): Response
    {
        $packageRoot = rtrim($packageRoot, '/');
        $route = preg_replace('/\/\d+/u', '/D', $request->route());
        $path = $packageRoot . '/Route/' . $route . '/' . $request->method() . '.php';
        if (file_exists($path)) {
            require $path;
            $controllerClass = $request->package() . '\\Route_' . str_replace('/', '_', $route) . '\\' . $request->method();
            /**
             * @var BaseController $controller
             */
            if (class_exists($controllerClass)) {
                $controller = new $controllerClass($packageRoot, $request);
            } else {
                throw new RouteException(sprintf('Route: the class "%s" does not exist', $controllerClass));
            }

            /**
             * Call handler.
             */
            $handler = filter_input_array(INPUT_POST)['handler'] ?? filter_input_array(INPUT_GET)['handler'] ?? 'index';
            if (method_exists($controllerClass, $handler)) {
                $controller->invoke($handler);
                return $controller->getResponse();
            } else {
                throw new RouteException(sprintf('Route: the method "%s" does not exist', $handler));
            }
        } else {
            throw new RouteException(sprintf('Route: path "%s" does not exist', $request->package() . '/Route/' . $route . '/' . $request->method() . '.php'));
        }
    }
Find and call controller, get Response object.

@param string $packageRoot
@param Request $request
@return Response
@throws RouteException