private function handle($request)
    {
        $found = $this->fileMap->render($request->getPathToMatch());
        if (empty($found)) {
            return null;
        }
        if (is_resource($found[0])) {
            return $request->respond()->asFileContents($found[0], $found[1]);
        }
        if (is_string($found[0])) {
            return $request->respond()->asContents($found[0]);
        }
        return null;
    }