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sky-take-out
/
websocket-client.html

<!DOCTYPE HTML>
<html>
<head>
  <meta charset="UTF-8">
  <title>WebSocket Demo</title>
</head>
<body>
<input id="text" type="text" />
<button onclick="send()">发送消息</button>
<button onclick="closeWebSocket()">关闭连接</button>
<div id="message">
</div>
</body>
<script type="text/javascript">
  var websocket = null;
  var clientId = Math.random().toString(36).substr(2);

  //判断当前浏览器是否支持WebSocket
  if('WebSocket' in window){
    //连接WebSocket节点
    websocket = new WebSocket("ws://localhost:8080/ws/"+clientId);
  }
  else{
    alert('Not support websocket')
  }

  //连接发生错误的回调方法
  websocket.onerror = function(){
    setMessageInnerHTML("error");
  };

  //连接成功建立的回调方法
  websocket.onopen = function(){
    setMessageInnerHTML("连接成功");
  }

  //接收到消息的回调方法
  websocket.onmessage = function(event){
    setMessageInnerHTML(event.data);
  }

  //连接关闭的回调方法
  websocket.onclose = function(){
    setMessageInnerHTML("close");
  }

  //监听窗口关闭事件，当窗口关闭时，主动去关闭websocket连接，防止连接还没断开就关闭窗口，server端会抛异常。
  window.onbeforeunload = function(){
    websocket.close();
  }

  //将消息显示在网页上
  function setMessageInnerHTML(innerHTML){
    document.getElementById('message').innerHTML += innerHTML + '<br/>';
  }

  //发送消息
  function send(){
    var message = document.getElementById('text').value;
    websocket.send(message);
  }

  //关闭连接
  function closeWebSocket() {
    websocket.close();
  }
</script>
</html>