Question

我写了一个节点程序，我遇到了很大困难。

服务器端代码如下：

var express=require("express");
var app=express();
var socketio=require("socket.io");
var server=require("http").Server(app);
var ws=socketio.listen(server);
app.use(express.static('public'));
app.listen(3000);
ws.on('connection',function(socket){
socket.on("message",function(msg){
    console.log("got:"+msg);
    socket.send('pong');
    });
});

客户端代码如下：

<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>websocket echo</title>
</head>
<body>
<h1>websocket echo</h1>
<h2>latency:<span id="latency"></span>ms</h2>
<script>

var lastMessage;
window.onload=function(){
    //create socket

    var ws=new WebSocket("ws://127.0.0.1:3000");
    ws.onopen=function(){
        //send first ping
        ping();
    };
    // 监听Socket的关闭
    ws.onclose = function(event) {
        console.log('Client notified socket has closed',event);
    };
    ws.onmessage=function(ev){
        console.log("got:"+ev.data);

        document.getElementById("latency").innerHTML=new Date-lastMessage;
        ping();
    };
    function ping(){
        lastMessage= + new Date;
        ws.send("ping");
    }
}
</script>
</body>
</html>

Chrome控制台中有提示：与'ws：//127.0.0.1：3000 /'的WebSocket连接失败：在收到握手响应（索引）之前连接已关闭：16 客户端通知套接字已关闭CloseEvent

Answer 1

正如评论中所提到的那样，因为socket.io应该与它自己的客户端连接。你应该在两边都使用websockets或socket.io。

连接在收到握手响应之前关闭

1 个答案: