go - websocket 写关闭消息总是发送 1006

Question

我想向客户端发送关闭代码，但它始终是 1006。

我试过了，

func ServeWs(w http.ResponseWriter, r *http.Request) {
    conn := Upgrade(w, r)
    msg := websocket.FormatCloseMessage(4001, "myError")
    // case 1
    conn.WriteMessage(websocket.CloseMessage, msg)

    // case 2
    //conn.WriteControl(websocket.CloseMessage, msg, time.Now().Add(time.Second))

    // case 3
    //w, err := conn.NextWriter(websocket.CloseMessage)
    //if err != nil {
    //  return
    //}
    //if _, err = w.Write(msg); err != nil {
    //  log.Println(err)
    //}
    //w.Close()

    time.Sleep(10*time.Second)
    conn.Close()
}

func Upgrade(w http.ResponseWriter, r *http.Request) *websocket.Conn{
    conn, err := upgrader.Upgrade(w, r, nil)
    if err != nil {
        log.Println(err)
        return nil
    }
    return conn
}

但并非所有这些情况都有效。如何将 except 1006 发送给客户端？

我还测试了 Node js ws 包来验证客户端的。

const WebSocket = require('ws');

const ws = new WebSocket.Server({ port: 8088 });

ws.on('connection', function connection(ws) {
  ws.close(1000, 'bac');
});

此 javascript 代码运行良好。

=== 添加了 ===

用于测试的客户端代码。在 chrome 开发工具控制台中，粘贴到下面

conn = new WebSocket("ws://127.0.0.1:8088/connect"); conn.onclose = function(evt){console.log("do", evt);}; conn.onerror = function(err){console.log("err", err);}; conn.onmessage = function(msg){console.log("msg", msg);};

Answer 1

这都是因为“ sleep ”

//time.Sleep(10*time.Second)
conn.Close()

删除 Sleep 后，代码工作正常。