public function defaultSpaRobotsTxt($request, $match)
    {
        $name = Tenant_Service::setting('spa.default', 'not-found');
        $spa = Tenant_SPA::getSpaByName($name);
        if (! isset($spa)) {
            $spa = Tenant_SpaService::getNotfoundSpa();
        }
        $resourcePath = $spa->getResourcePath('robots.txt');
        $host = ($request->https ? 'https://' : 'http://') . $request->SERVER['HTTP_HOST'];
        return new Tenant_HTTP_Response_RobotsTxt($host, $resourcePath);
    }