有些东西会中断WebSocket连接

Question

首次发送数据后，连接中断。我有另一个JavaScript与服务器部分工作正常，但这段代码导致错误：

  

WebSocket已经处于CLOSING或CLOSED

有什么想法吗？

的JavaScript

window.addEventListener("load", start, false);
var webSocket;
var stage;
var players = [];
var shapes = [];
var userMarker;
var messageNumber = 0;
var userPosition;
var prevUserPosition;

function start(){
    writeToScreen("Start");
    webSocket = new WebSocket("ws://192.168.1.34:8080/WaterWorldGame/game_endpoint");

    webSocket.onopen = function(event) {
     onOpen(event);
    };

    webSocket.onerror = function(event) {
       onError(event);
    };

    webSocket.onmessage = function(event) {
       onMessage(event);
    };

    webSocket.onclose = function(event) {
        onClose(event);
    };

    stage = new createjs.Stage("myCanvas");
    createjs.MotionGuidePlugin.install();
    userMarker = new createjs.Shape();
    userMarker.graphics.beginFill("DeepSkyBlue").drawCircle(0, 0, 3);
    userMarker.x = -100;
    userMarker.y = -100;
    stage.on("stagemousedown", function(evt) {
    if (userMarker.x == -100 && userMarker.y == -100) {
        userMarker.x = evt.stageX;;
        userMarker.y = evt.stageY;
        stage.addChild(userMarker);
        stage.update();
    } else {
        createjs.Tween.get(userMarker, {override:true})
        .to({x:stage.mouseX, y:stage.mouseY}, 4000);
        createjs.Ticker.setFPS(20); 
    }       
    }); 
    createjs.Ticker.addEventListener("tick", locate);   
}   

function onOpen(event){
    writeToScreen("Connection established");
}

function onClose(event){
    writeToScreen("The connection was interrupted T.T");
}

function onMessage(event){
    var json = JSON.parse(event.data);
    var isExist = false;

    for (var i = 0; i < players.length; i++) {
        if ( players[i] == json.playerName ) {
            shape = shapes[i];
            shape.x = json.x;
            shape.y = json.y;
            isExist = true;
            break;
        }
    }

    if (isExist == false)
    {
        players[players.length] = json.playerName;
        shapes[shapes.length] = new createjs.Shape();
        shape = shapes[shapes.length - 1];
        shape.graphics.beginFill("#555555").drawCircle(json.x, json.y, 3);
        stage.addChild(shape);
    }

    writeToScreen("Player: " + json.sessionName + "; x = " + json.x + "; y = " + json.y);
}

function onError(event){
    writeToScreen('<span style="color: red;">ERROR:</span> ' + event.data);
}   

function writeToScreen(message) {
    document.getElementById('messages').innerHTML += message + "<br>";
    messageNumber++;
    if (messageNumber == 20){
        document.getElementById('messages').innerHTML = "";
        messageNumber = 0;
    }

}       

function doSend(){
    if (userPosition != undefined && userPosition != prevUserPosition)
    {
        writeToScreen("SENT: " + userPosition);
        webSocket.send(userPosition);
        prevUserPosition = userPosition;
    }
}

function locate(event) {
   stage.update();
   userPosition = '{'
               + '"x" : ' + userMarker.x
               + ', "y" : ' + userMarker.y
               + '}';
   doSend();    
}