data(){
return{
websock: null, //建立的连接
lockReconnect: false, //是否真正建立连接
timeout: 20 * 1000, //20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
}
}
mounted(){
this.initWebSocket();
}
destroyed() {
//页面销毁时关闭长连接
this.websocketclose();
},
initWebSocket() {
//建立连接
//初始化weosocket
const wsuri = `地址`;
//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;
},
reconnect() {
//重新连接
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);
},
reset() {
//重置心跳
var that = this;
//清除时间
clearTimeout(that.timeoutObj);
clearTimeout(that.serverTimeoutObj);
//重启心跳
that.start();
},
start() {
//开启心跳
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("heartbeat");
} else {
//否则重连
self.reconnect();
}
self.serverTimeoutObj = setTimeout(function() {
//超时关闭
self.websock.close();
}, self.timeout);
}, self.timeout);
},
websocketonopen() {
//连接成功事件
this.websocketsend('发送数据');
//提示成功
// console.log("连接成功", 3);
//开启心跳
this.start();
},
websocketonerror(e) {
//连接失败事件
//错误
console.log("WebSocket连接发生错误");
//重连
this.reconnect();
},
websocketclose(e) {
//连接关闭事件
//提示关闭
// console.log("连接已关闭");
//重连
this.reconnect();
},
websocketonmessage(event) {
//接收服务器推送的信息
//打印收到服务器的内容
console.log("收到服务器信息",event.data);
let datas = JSON.parse(event.data)
//收到服务器信息，心跳重置
this.reset();
},
websocketsend(msg) {
//向服务器发送信息
this.websock.send(msg);
},
