code: func (srv *Server) Validate() bool {
  	if srv.debug {
  		return true
  	}
  	timestamp := srv.Query("timestamp")
  	nonce := srv.Query("nonce")
  	signature := srv.Query("signature")
  	return signature == util.Signature(srv.Token, timestamp, nonce)
  }
docs: //Validate 校验请求是否合法