javascript - WebSocket with extra garbled in the end of message -

i want use websocket post mouse position device(iphone ...), after post post message anyoter device , can receieve message web ,but there strange thing ,it's have garbled code in end of message

first use prototype create socket , add function it

var socket = function(){    this.ws = new websocket("ws://172.16.3.103:60001");    this.ws.onopen = function() {       console.log("[websocket#onopen]\n");    }    this.ws.onmessage = function(e) {       console.log("[websocket#onmessage] message: '" + e.data + "'\n");    }    this.ws.onclose = function() {       console.log("[websocket#onclose]\n");       self.ws = null ;    } }  socket.prototype.send = function(data){   console.log("send data server")   if (this.ws) {      var convert = json.stringify(data,null,4);      var senddata = "50001#" + convert + "@"      senddata = senddata.replace(/(\n)+|(\r\n)+/g, "");      console.log("send:",senddata)      this.ws.send(senddata)      this.ws.send("50001#*")     } }  socket.prototype.close = function(){     if (this.ws) {         this.ws = null     } } var socket = new socket() 

then position canvas , use websocket send json message(i convert json jsonstring in send function)

this.canvas.addeventlistener('mousemove',function(event){      var x = event.pagex-getbodyoffsetleft(this),      y = event.pagey-getbodyoffsettop(this);      self.onmousemove({x:x,y:y});      var dict1 = {"type":"move","x":x,"y":y}     var newdict = {"name":"line","dict":dict1}     socket.send(newdict) },false);  

after send message onmessage callback running found strange thing in console ,most of message have garbled in end of message

[websocket#onmessage] message: '50001#{    "name": "line",    "dict": {        "type": "move",        "x": 313,        "y": 300    }}@�o[��n��-j��' 

what happen?