func (c *chainedRule) Valid(w http.ResponseWriter, r *http.Request) bool {
	if !c.Rule.Valid(w, r) {
		return false
	}
	return c.next.Valid(w, r)
}
func (c *chainedRule) Valid(w http.ResponseWriter, r *http.Request) bool {
	if !c.Rule.Valid(w, r) {
		return false
	}
	return c.next.Valid(w, r)
}
// Valid validator