<template>
</template>
<script>
export default {
 data() {
  return{
   // 用户Id
   userId:'',
   appid:'',
   // 事件类型
   type:'',
   msg:'',
   wsUrl:''
  }  
 },
 methods: {
  //初始化weosocket
  initWebSocket() {
   if (typeof WebSocket === "undefined") {
    alert("您的浏览器不支持WebSocket");
    return false;
   }
   const wsuri = 'ws://(后端WebSocket地址)/websocket/' + this.userId + '/' + this.appid // websocket地址
   this.websock = new WebSocket(wsuri);
   this.websock.onopen = this.websocketonopen;
   this.websock.onmessage = this.websocketonmessage;
   this.websock.onerror = this.websocketonerror;
   this.websock.onclose = this.websocketclose;
  },
  //连接成功
  websocketonopen() {
   console.log("WebSocket连接成功");
   // 添加心跳检测，每30秒发一次数据，防止连接断开（这跟服务器的设置有关，如果服务器没有设置每隔多长时间不发消息断开，可以不进行心跳设置）
   let self = this;
   this.timer = setInterval(() => {
    try {
     self.websock.send('test')
     console.log('发送消息');
    }catch(err){
     console.log('断开了：' + err);
     self.connection()
    }
   }, 30000)
  },
  //接收后端返回的数据，可以根据需要进行处理
  websocketonmessage(e) {
   var vm = this;
   let data1Json = JSON.parse(e.data);
   console.log(data1Json);
  },
  //连接建立失败重连
  websocketonerror(e) {
   console.log(`连接失败的信息：`, e);
   this.initWebSocket(); // 连接失败后尝试重新连接
  },
  //关闭连接
  websocketclose(e) {
   console.log("断开连接", e);
  }
 },
 created() {
  if (this.websock) {
   this.websock.close(); // 关闭websocket连接
  }
  this.initWebSocket();
 },
 destroyed() {
  //页面销毁时关闭ws连接
  if (this.websock) {
   this.websock.close(); // 关闭websocket
  }
 }
};
</script>