js socket心跳链接及断线重连处理

//Socket通讯工具类
		var heartCheck = {
		timeout: 10000, //10秒发一次心跳
		timeoutObj: null,
		serverTimeoutObj: null,
		servetInterval:null,
			reset: function() {
				clearTimeout(this.timeoutObj);
				clearTimeout(this.serverTimeoutObj);
				return this;
			},
		start: function(websocket) {
				var self = this;
				this.timeoutObj = setTimeout(function() {
						//这里发送一个心跳，后端收到后，返回一个心跳消息，
						//onmessage拿到返回的心跳就说明连接正常
						console.log('发送了心跳数据');
 						var msg = {};
 						msg.messageType = -1;
 						msg.message = '-1';
						websocket.send(msg);
						self.serverTimeoutObj = setTimeout(function() { //如果超过一定时间还没重置，说明后端主动断开了
								websocket.close();
						}, self.timeout)
				}, this.timeout)
		},
		}

var SocketConnect = function socket(url,callback){
		var websocket = null;
		var lockReconnect = false;
		var baseurl = "ws://192.168.1.143:8888"//socket通讯地址
        reconnect();
		
		//重新链接
		function reconnect() {
			var context = this;
			if (context.lockReconnect) return;
			context.lockReconnect = true;
			//setTimeout(function() { //没连接上会一直重连，设置延迟避免请求过多
					console.log("重链了");
					if('WebSocket' in window) {
							//websocket = new WebSocket("wss://"+url);
							websocket = new WebSocket(baseurl+url);
					}else{
							alert("该浏览器不支持实时通信功能");
					}
					context.lockReconnect = false;
					
					//监听窗口关闭事件
					window.onbeforeunload = function() {
						console.log("窗口关闭");
						websocket.close();
					}
					
					websocket.onopen= function() {
							//重置心跳检测
							heartCheck.reset().start(websocket);
							console.log("websocket连接成功");
					}
					
					websocket.onclose= function() {
						//链接断开后重连
						console.log("websocket连接关闭");
						if(heartCheck.servetInterval == null){
							heartCheck.servetInterval = setInterval(function(){
								console.log('当前链接状态'+websocket.readyState);
								if(websocket.readyState != 1){
									websocket.close();
									//若为未链接状态则尝试重新链接未连接状态
									reconnect();
								}else{
									clearInterval(heartCheck.servetInterval);
									heartCheck.servetInterval = null;
									heartCheck.reset().start(websocket);
								}
							},5000);
						}
					}
					
					websocket.onmessage= function(event) {
							//重置心跳检测
							console.log('接收到了消息:'+event);
							heartCheck.reset().start(websocket);
 							var msg = $.parseJSON(event.data);
 							if(msg.messageType != -1){
 								callback(event);
 							}
					}
					websocket.onerror = function() {
						console.log("websocket连接出错");
							reconnect();
					};
			//}, 0);
		}
		
		
    this.sendMsg = function sendMsg(message) {
        try{
						console.log('发送消息了');
            websocket.send(message);
        }catch(err){
						console.log('消息发送失败'+err);
            // new ToastMessage('消息发送失败');
        }
    }
   
    this.close = function closeWebSocket(){
        websocket.close();
        reconnect();
    }
		window.onbeforeunload = function(event) {
        websocket.close();
    }
}