浏览器使用WebSocket实时通讯

港控/mmm° 2022-08-21 11:56 155阅读 0赞

如果你要有一个支持 WebSocket的服务器（Java、Php等），可以在浏览器中使用一个新的WebSocket服务协议，来打开一个链接：

var socket = new WebSocket("ws://172.0.0.1:8080/SpringWebSocketPush/websck");

与http://这一URL 前缀等价的WebSocket 前缀 是 ws:// ,安全 WebSocket 则有一个与http://等价的 wss:// 前缀。  
  
  
该套接口对象有四个用来监听套接口事件的回调：

socket.onopen = function(){ 
    
            //打开
    
        }
    
    
        socket.onmessage = function(){ 
    
            //在event.data消息数据
    
        }
    
        socket.onclose = function(){ 
    
            //关闭WebSocket
    
        }
    
        socket.onerror = function(){ 
    
            //错误触发
    
        }

通过套接口发送数据，调用socket.send:

socket.send(message)

代码附上：

<!DOCTYPE html>
    <html>
    
        <head>
            <meta charset="UTF-8">
            <meta content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=no" name="viewport">
            <title>WebSocket</title>
        </head>
    
        <body>
        </body>
        <script> var socket; if (window.WebSocket) { socket = new WebSocket("ws://localhost:8080/myapp"); socket.onmessage = function(event) { alert("Received data from websocket: " + event.data); } socket.onopen = function(event) { alert("Web Socket opened!"); }; socket.onclose = function(event) { alert("Web Socket closed."); }; } else { alert("Your browser does not support Websockets. (Use Chrome)"); } function send(message) { if (!window.WebSocket) { return; } if (socket.readyState == WebSocket.OPEN) { socket.send(message); } else { alert("The socket is not open."); } } </script>
    
    </html>

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