<script type="text/javascript">
    var cnt=0;
    var lockReconnect = false;  //避免ws重復連接
    var ws = null;          // 判斷當前瀏覽器是否支持WebSocket
    var wsUrl=webSocketURL;
    createWebSocket(wsUrl);
    function createWebSocket(url) {
        try {
            if ('WebSocket' in window) {
                ws = new WebSocket(url);
            } else if ('MozWebSocket' in window) {
                ws = new MozWebSocket(url);
            } else {
                layer.open({
                    content: "當前瀏覽器不支持WebSocket",
                    type: 1,
                    // icon: 0,
                    time: 0, closeBtn: 1, btn: 0, title: "提示信息", isOutAnim:true,anim: 2,area: ['400px', '300px'],shade: 0.2,tipsMore: true
                });
            }
            initEventHandle();
        } catch (e) {
            reconnect(url);
        }
    }
   // var socketsend;
    function initEventHandle() {
        ws.onclose = function () {
            console.log("llws連接關閉!" + CurentTime());
            reconnect(wsUrl);
        };
        ws.onerror = function () {
            console.log("llws連接錯誤!");
            reconnect(wsUrl);
        };
        ws.onopen = function () {
            // heartCheck.reset().start();      //心跳檢測重置
            console.info("llws連接成功!" + CurentTime());
        };
        ws.onmessage = function (evt) {    //如果獲取到消息，心跳檢測重置
            console.info("llws連接成功" + evt.data);
           var data = $.parseJSON(evt.data);
            if(data.order==0){
                addOpenRecord();//開門記錄
            }
            if(data.order==1){
                addStranger(data.data);//推送陌生人
            }
            if(data.order==2){
                //推送命中內(nèi)部人員實時照片
                addInsider(data.data);
            }
            if(data.order==3){//陌生人記錄
                addStrangerRecord();
            }

        }
    }
// 監(jiān)聽窗口關閉事件哮针，當窗口關閉時睡汹，
// 主動去關閉websocket連接，防止連接還沒斷開就關閉窗口，server端會拋異常圆裕。
    window.onbeforeunload = function () {
        ws.close();
    }
    function reconnect(url) {
        if (lockReconnect) return;
        lockReconnect = true;
        setTimeout(function () {
            //沒連接上會一直重連取逾，設置延遲避免請求過多
            createWebSocket(url);
            lockReconnect = false;
        }, 2000);
    }
    //心跳檢測
    var heartCheck = {
        timeout: 3000,
        timeoutObj: null,
        serverTimeoutObj: null,
        reset: function () {
            clearTimeout(this.timeoutObj);
            clearTimeout(this.serverTimeoutObj);
            return this;
        },
        start: function () {
            var self = this;
            this.timeoutObj = setTimeout(function () {
                //這里發(fā)送一個心跳，后端收到后箕母，返回一個心跳消息储藐，
                //onmessage拿到返回的心跳就說明連接正常
                ws.send("ping");
                console.log("ping!")
                self.serverTimeoutObj = setTimeout(function () {
                    //如果超過一定時間還沒重置，說明后端主動斷開了
                    //如果onclose會執(zhí)行reconnect嘶是，我們執(zhí)行ws.close()就行了.如果直接執(zhí)行reconnect 會觸發(fā)onclose導致重連兩次
                    ws.close();
                },self.timeout)
            },this.timeout)
        }
    }
    function CurentTime(){
        var now = new Date();
        var year = now.getFullYear();       //年
        var month = now.getMonth() + 1;     //月
        var day = now.getDate();            //日
        var hh = now.getHours();            //時
        var mm = now.getMinutes();          //分
        var ss=now.getSeconds();     // 獲取當前秒數(shù)(0-59)
        if(month < 10)
            month = "0"+month;
        if(day < 10)
            day = "0"+day;
        if(hh < 10)
            hh = "0"+hh;
        if(mm < 10)
            mm = "0"+mm;
        if(ss < 10)
            ss = "0"+ss;
        clock=year+"-"+month+"-"+day+" "+hh+":"+mm+":"+ss;
        return(clock);
    }

</script>