/**
* URL重定向
* @access protected
* @param string $url 跳转的URL表达式
* @param array|integer $params 其它URL参数
* @param integer $code http code
* @return void
*/
protected function redirect($url, $params = [], $code = 302)
{
$response = new Redirect($url);
if (is_integer($params)) {
$code = $params;
$params = [];
}
$response->code($code)->params($params);
throw new HttpResponseException($response);
}
