Vue+WebSocket 心跳机制 保持连接

<template>
  <div></div>
</template>
<script>
export default {
  data() {
    return {
      // websocket
      websock: null, //建立的连接
      lockReconnect: false, //是否真正建立连接
      timeout: 28 * 1000, //30秒一次心跳
      timeoutObj: null, //心跳心跳倒计时
      serverTimeoutObj: null, //心跳倒计时
      timeoutnum: null, //断开 重连倒计时
    }
  },
  created() {
    //页面刚进入时开启长连接
    this.initWebSocket();
  },
  destroyed: function () {
    //页面销毁时关闭长连接
    this.websocketclose();
  },
  methods: {
    // WebSocket
    //建立连接
    initWebSocket() {
      //初始化weosocket
      //const wsuri = "ws://sms.填写您的地址.com/websocket/" + this.charId; //ws地址
      const wsuri ="ws://sms.balabala.com/websocket/" + this.$route.query.telphone
      //建立连接
      this.websock = new WebSocket(wsuri);
      //连接成功
      this.websock.onopen = this.websocketonopen;
      //连接错误
      this.websock.onerror = this.websocketonerror;
      //接收信息
      this.websock.onmessage = this.websocketonmessage;
      //连接关闭
      this.websock.onclose = this.websocketclose;
    },
    //重新连接
    reconnect() {
      var that = this;
      if (that.lockReconnect) {
        return;
      }
      that.lockReconnect = true;
      //没连接上会一直重连，设置延迟避免请求过多
      that.timeoutnum && clearTimeout(that.timeoutnum);
      that.timeoutnum = setTimeout(function () {
        //新连接
        that.initWebSocket();
        that.lockReconnect = false;
      }, 5000);
    },
    //重置心跳
    reset() {
      var that = this;
      //清除时间
      clearTimeout(that.timeoutObj);
      clearTimeout(that.serverTimeoutObj);
      //重启心跳
      that.start();
    },
    //开启心跳
    start() {
      var self = this;
      self.timeoutObj && clearTimeout(self.timeoutObj);
      self.serverTimeoutObj && clearTimeout(self.serverTimeoutObj);
      self.timeoutObj = setTimeout(function () {
        //这里发送一个心跳，后端收到后，返回一个心跳消息，
        if (self.websock.readyState == 1) {
          //如果连接正常
          self.websock.send(
            '{"toUserId":"' + self.$route.query.telphone + '"}'
          );
          console.log("发送消息");
        } else {
          //否则重连
          self.reconnect();
        }
        self.serverTimeoutObj = setTimeout(function () {
          //超时关闭
          self.websock.close();
        }, self.timeout);
      }, self.timeout);
    },
    //连接成功事件
    websocketonopen() {
      //提示成功
      console.log("连接成功", 3);
      //开启心跳
      this.start();
    },
    //连接失败事件
    websocketonerror(e) {
      //错误
      console.log("WebSocket连接发生错误");
      //错误提示
      console.log("Websocket error, Check you internet!");
      //重连
      this.reconnect();
    },
    //连接关闭事件
    websocketclose(e) {
      //关闭
      console.log("connection closed (" + e + ")");
      //提示关闭
      console.log("连接已关闭", 3);
      //重连
      this.reconnect();
    },
    //接收服务器推送的信息
    websocketonmessage(event) {
      //打印收到服务器的内容
      //数据接收
      let that = this;
      const redata = JSON.parse(event.data);
      console.log(redata,"数据接收");
      //收到服务器信息，心跳重置
      this.reset();
    },
    //向服务器发送信息
    websocketsend(msg) {
      //数据发送
      this.websock.send(msg);
    },
  },
};
</script>
<style  scoped>

</style>