websocket重連機制（心跳重連）

 

心跳重連（網絡斷開連接後，需要重連）

var WebSocket = {};
WebSocket.init = function(uri) {
    this.wsUri = uri;
    this.lastHeartBeat = new Date().getTime();
    this.overtime = 8000;

    initChannelData();
    WebSocket.websocket = new WebSocket(WebSocket.wsUri);

    WebSocket.websocket.onopen = function(evt) {
        onOpen(evt)
    };
    WebSocket.websocket.onclose = function(evt) {
        onClose(evt)
    };
    WebSocket.websocket.onmessage = function(evt) {
        onMessage(evt)
    };
    WebSocket.websocket.onerror = function(evt) {
        onError(evt)
    };
    setInterval(checkConnect,5000);
}

function checkConnect() {
     doSend("{'event':'ping'}");
     if ((new Date().getTime() - WebSocket.lastHeartBeat) > WebSocket.overtime) {
         reConnect();
     }
 }
function onMessage(e) {
     WebSocket.lastHeartBeat = new Date().getTime();
}
/**
* 重新連接
* */
function reConnect(){
    console.log("socket 連接斷開，正在嘗試重新建立連接");
    WebSocket.init("");
}