angular webSocket 简单示例：

  ws:WebSocket;//webSocket 下载文件webSocketClient():void{const ws = new WebSocket("ws://192.168.168.240:8000");ws.onopen = function() {console.log("client：打开连接");ws.send("client：hello，服务端");};ws.addEventListener('message', function (event) {console.log('Message from server ', event.data);});ws.onmessage = function(e) {const received_msg = e.data;alert("数据已接收...");setTimeout(() => {ws.close();}, 5000);};ws.onclose = function(params) {console.log("client：关闭连接");};}