golang web多种运行方式及多端口监听服务

1.监听一个端口的普通http

func listenServer() {
    http.Handle("/", http.HandlerFunc(lServe))
    http.ListenAndServe(":3002", nil)
}

func lServe(w http.ResponseWriter, r *http.Request) {
    log.Println("listen serve")
}

2.自定义路由器，监听多个端口

func muxServer() {
    mx := http.NewServeMux()
    mx.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        log.Println("this is 3002")
    })
    go http.ListenAndServe(":3002", mx)//注意这里，不开协程直接就监听阻塞了

    mt := http.NewServeMux()
    mt.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        log.Println("there is 3003")
    })
    http.ListenAndServe(":3003", mt)//这里开启第二个端口监听
}

3.使用tcp自定义监听多个端口，带上中间件

func sever() {
    mx := http.NewServeMux()
    l, err := net.Listen("tcp", ":3001")
    if err != nil {
        log.Println(err)
        return
    }
    mx.HandleFunc("/aa", test)
    mx.HandleFunc("/bb", test2)
    http.Serve(l, middle(mx))
}

func test(w http.ResponseWriter, r *http.Request) {
    log.Println("aa")
}

func test2(w http.ResponseWriter, r *http.Request) {
    log.Println("bb")
}

func middle(next http.Handler) http.Handler {
    return next
    //这里可以写入条件，符合的直接反馈next，继续执行，如果有其他逻辑按下面的方法进行逻辑处理

    // return http.HandlerFunc(
    //  func(w http.ResponseWriter, r *http.Request) {
    //      log.Println("123")
    //  },
    // )
}