golang的tcpsocket服务器心跳连接的处理

//HeartBeating, determine if client send a message within set time by GravelChannel
// 心跳计时，根据GravelChannel判断Client是否在设定时间内发来信息
func HeartBeating(conn net.Conn, readerChannel chan byte,timeout int) {
    select {
    case _ = <-readerChannel:
        Log(conn.RemoteAddr().String(), "get message, keeping heartbeating...")
        conn.SetDeadline(time.Now().Add(time.Duration(timeout) * time.Second))
        break
    case <-time.After(time.Second*5):
        Log("It's really weird to get Nothing!!!")
        conn.Close()
    }
}