<template>
</template>
<script>
export default {
 data() {
  return{
   // 用戶Id
   userId:'',
   appid:'',
   // 事件類型
   type:'',
   msg:'',
   wsUrl:''
  }  
 },
 methods: {
  //初始化weosocket
  initWebSocket() {
   if (typeof WebSocket === "undefined") {
    alert("您的瀏覽器不支持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;
  },
  //連接成功
  websocketonopen() {
   console.log("WebSocket連接成功");
   // 添加心跳檢測(cè)，每30秒發(fā)一次數(shù)據(jù)，防止連接斷開（這跟服務(wù)器的設(shè)置有關(guān)，如果服務(wù)器沒有設(shè)置每隔多長時(shí)間不發(fā)消息斷開，可以不進(jìn)行心跳設(shè)置）
   let self = this;
   this.timer = setInterval(() => {
    try {
     self.websock.send('test')
     console.log('發(fā)送消息');
    }catch(err){
     console.log('斷開了：' + err);
     self.connection()
    }
   }, 30000)
  },
  //接收后端返回的數(shù)據(jù)，可以根據(jù)需要進(jìn)行處理
  websocketonmessage(e) {
   var vm = this;
   let data1Json = JSON.parse(e.data);
   console.log(data1Json);
  },
  //連接建立失敗重連
  websocketonerror(e) {
   console.log(`連接失敗的信息：`, e);
   this.initWebSocket(); // 連接失敗后嘗試重新連接
  },
  //關(guān)閉連接
  websocketclose(e) {
   console.log("斷開連接", e);
  }
 },
 created() {
  if (this.websock) {
   this.websock.close(); // 關(guān)閉websocket連接
  }
  this.initWebSocket();
 },
 destroyed() {
  //頁面銷毀時(shí)關(guān)閉ws連接
  if (this.websock) {
   this.websock.close(); // 關(guān)閉websocket
  }
 }
};
</script>