简单实现一个Websocket服务

WebSocket是HTML5里提供的一种便于TCP长连接通讯的协议机制,随着HTML5的普及这种技术的使用会变得越来越广泛,由于Beetle可以灵活地扩展不同的协议,那自然而然对WebSocket支持也是一件非常简单的事情.对于WebSocket的协议分析处理就不详细描述可以参考下载程序有完整协议包代码,如果想更详细了解Websocket的协议可以到这里:http://datatracker.ietf.org/doc/rfc6455/?include_text=1 

下面讲述如何使用Beetle非常方便地实现一个基于WebSocket的Hello wold程序.

服务端代码

    class Program:WebSocketServer
    {
        static void Main(string[] args)
        {
            TcpUtils.Setup("beetle");
            Program server = new Program();
            server.Open(8088);
            Console.WriteLine("websocket start@8088");
            System.Threading.Thread.Sleep(-1);
        }
        protected override void OnConnected(object sender, ChannelEventArgs e)
        {
            base.OnConnected(sender, e);
        }
        protected override void OnDisposed(object sender, ChannelDisposedEventArgs e)
        {
            base.OnDisposed(sender, e);
        }
        protected override void OnError(object sender, ChannelErrorEventArgs e)
        {
            base.OnError(sender, e);
        }
        protected override void OnWebSocketReceive(TcpChannel channel, DataPackage e)
        {
            Console.WriteLine("MessageType:{0}", e.Type);
            Console.WriteLine("RequestPath:{0}", e.RequestPath);
            if (e.Type == PackageType.text)
            {
                Console.WriteLine(e.ToString());
                DataPackage dp = new DataPackage();
                dp.Type = PackageType.text;
                dp.Data.Encoding("hello " + e.ToString(), Encoding.UTF8);
                channel.Send(dp);
            }
        }
    }

以上就是一个完整的websocket服务,代码非常简单WebSocketServer重写OnWebSocketReceive即可,在事件中根据需要处理对应的DataPackage即可,对于DataPackage的结构和类型实现参考下载代码.

Html代码

<html>
<meta charset="utf-8" />
<title>WebSocket Test</title>
<script language="javascript" type="text/javascript">
    var wsUri = "ws://127.0.0.1:8088/";
    var output;
    function init() {
        output = document.getElementById("output"); 
        testWebSocket(); 
    }
    function testWebSocket() {
        websocket = new WebSocket(wsUri);
        websocket.onopen = function (evt) { onOpen(evt) };
        websocket.onclose = function (evt) { onClose(evt) };
        websocket.onmessage = function (evt) { onMessage(evt) };
        websocket.onerror = function (evt) { onError(evt) };
    } function onOpen(evt) {
        writeToScreen("CONNECTED");
        
    }
    function onClose(evt) { writeToScreen("DISCONNECTED"); }
    function onMessage(evt) { document.getElementById('result').value = evt.data; }
    function onError(evt) { writeToScreen('<span style="color: red;">ERROR:</span> ' + evt.data); }
    function doSend(message) {  websocket.send(message); }
    function writeToScreen(message) {
        var pre = document.createElement("p"); pre.style.wordWrap = "break-word"; pre.innerHTML = message; output.insertBefore(pre);
    }

    function OnConnect() {
        wsUri = document.getElementById("url").value;
        init();
        
    }
     </script>
<body>
<fieldset>
<legend>WebSocket hello wold</legend>
    <p><span>Server url:</span><input id="url" type="text"  value="ws://127.0.0.1:8088/"/><input type="button" value="Connected" onclick="OnConnect()" /></p>
    <p><span>Enter you name:</span><input id="youname" type="text"  value="test"/><input type="button" value="Submit" onclick="doSend(document.getElementById('youname').value)" /></p>
    <p><span>Result:</span><input id="result" type="text"  value=""/></p>
    </fieldset>
<div id="output">

</div>
</body>
</html>

运行效果

这样一个基于Hello wold的Websocket处理程序就完成.如果对Websocket感兴趣的朋友可以下载源代码了解websocket协议分析的原理,如何从byte[]分析出对应的websocket协议.

下载代码

posted @ 2012-11-24 22:50  beetlex  阅读(15056)  评论(14编辑  收藏  举报