code: func (G *global_data) SetParams(params map[string]string) *global_data {
  	if G.Req.Params == nil {
  		G.Req.Params = make(map[string]string)
  	}
  	for key, value := range params {
  		G.Req.Params[key] = value
  	}
  	return G
  }
docs: // Set several url Param for the coming request