服务端代码[控制台示例]

static list<socket> sockets = new list<socket>();
        static void main(string[] args)
        {
            int port = 10;
            byte[] buffer = new byte[1024];

            ipendpoint localep = new ipendpoint(ipaddress.any, port);
            socket listener = new socket(localep.address.addressfamily, sockettype.stream, protocoltype.tcp);

            try
            {
                listener.bind(localep);
                listener.listen(10);
                console.writeline("等待客户端连接....");
                while (true) //该操作用于多个客户端连接
                {
                    socket sc = listener.accept();//接受一个连接
                    sockets.add(sc); //将连接的客户端, 添加到内存当中
                    thread t = new thread(new threadstart(() => receivedata(sc))); //开启当前socket线程, 去执行获取数据的动作,与客户端通信
                    t.isbackground = true;
                    t.start();
                }


            }
            catch (exception e)
            {
                console.writeline(e.tostring());
            }
            console.readline();
        }

        public static void receivedata(socket sc)
        {
            byte[] buffer = new byte[1024];
            console.writeline("接受到了客户端：" + sc.remoteendpoint.tostring() + "连接....");
            //握手
            int length = sc.receive(buffer);//接受客户端握手信息
            sc.send(packhandshakedata(getseckeyaccetp(buffer, length)));while (true)
            {
                try
                {
                    //接受客户端数据
                    console.writeline("等待客户端数据....");
                    length = sc.receive(buffer);//接受客户端信息
                    string clientmsg = analyticdata(buffer, length);
                    console.writeline("接受到客户端数据：" + clientmsg);
                    //发送数据
                    string sendmsg = "服务端返回信息:" + clientmsg;
                    sc.send(packdata(sendmsg));
                }
                catch (exception ex)
                {
                    sockets.remove(sc);  //如果接收的过程中,断开, 那么内存中移除当前socket对象, 并且退出当前线程
                    console.writeline("客户端已经断开连接!");
                    return;
                }
            }
        }

socket 相关类

  /// <summary>
        /// 打包握手信息
        /// </summary>
        /// <param name="seckeyaccept"></param>
        /// <returns></returns>
        private static byte[] packhandshakedata(string seckeyaccept)
        {
            var responsebuilder = new stringbuilder();
            responsebuilder.append("http/1.1 101 switching protocols" + environment.newline);
            responsebuilder.append("upgrade: websocket" + environment.newline);
            responsebuilder.append("connection: upgrade" + environment.newline);
            responsebuilder.append("sec-websocket-accept: " + seckeyaccept + environment.newline + environment.newline);
            return encoding.utf8.getbytes(responsebuilder.tostring());
        }

        /// <summary>
        /// 生成sec-websocket-accept
        /// </summary>
        /// <param name="handshaketext">客户端握手信息</param>
        /// <returns>sec-websocket-accept</returns>
        private static string getseckeyaccetp(byte[] handshakebytes, int byteslength)
        {
            string handshaketext = encoding.utf8.getstring(handshakebytes, 0, byteslength);
            string key = string.empty;
            regex r = new regex(@"sec\-websocket\-key:(.*?)\r\n");
            match m = r.match(handshaketext);
            if (m.groups.count != 0)
            {
                key = regex.replace(m.value, @"sec\-websocket\-key:(.*?)\r\n", "$1").trim();
            }
            byte[] encryptionstring = sha1.create().computehash(encoding.ascii.getbytes(key + "258eafa5-e914-47da-95ca-c5ab0dc85b11"));
            return convert.tobase64string(encryptionstring);
        }

        /// <summary>
        /// 解析客户端数据包
        /// </summary>
        /// <param name="recbytes">服务器接收的数据包</param>
        /// <param name="recbytelength">有效数据长度</param>
        /// <returns></returns>
        private static string analyticdata(byte[] recbytes, int recbytelength)
        {
            if (recbytelength < 2) { return string.empty; }

            bool fin = (recbytes[0] & 0x80) == 0x80; // 1bit，1表示最后一帧  
            if (!fin)
            {
                return string.empty;// 超过一帧暂不处理 
            }

            bool mask_flag = (recbytes[1] & 0x80) == 0x80; // 是否包含掩码  
            if (!mask_flag)
            {
                return string.empty;// 不包含掩码的暂不处理
            }

            int payload_len = recbytes[1] & 0x7f; // 数据长度  

            byte[] masks = new byte[4];
            byte[] payload_data;

            if (payload_len == 126)
            {
                array.copy(recbytes, 4, masks, 0, 4);
                payload_len = (uint16)(recbytes[2] << 8 | recbytes[3]);
                payload_data = new byte[payload_len];
                array.copy(recbytes, 8, payload_data, 0, payload_len);

            }
            else if (payload_len == 127)
            {
                array.copy(recbytes, 10, masks, 0, 4);
                byte[] uint64bytes = new byte[8];
                for (int i = 0; i < 8; i++)
                {
                    uint64bytes[i] = recbytes[9 - i];
                }
                uint64 len = bitconverter.touint64(uint64bytes, 0);

                payload_data = new byte[len];
                for (uint64 i = 0; i < len; i++)
                {
                    payload_data[i] = recbytes[i + 14];
                }
            }
            else
            {
                array.copy(recbytes, 2, masks, 0, 4);
                payload_data = new byte[payload_len];
                array.copy(recbytes, 6, payload_data, 0, payload_len);

            }

            for (var i = 0; i < payload_len; i++)
            {
                payload_data[i] = (byte)(payload_data[i] ^ masks[i % 4]);
            }

            return encoding.utf8.getstring(payload_data);
        }
        
        /// <summary>
        /// 打包服务器数据
        /// </summary>
        /// <param name="message">数据</param>
        /// <returns>数据包</returns>
        private static byte[] packdata(string message)
        {
            byte[] contentbytes = null;
            byte[] temp = encoding.utf8.getbytes(message);

            if (temp.length < 126)
            {
                contentbytes = new byte[temp.length + 2];
                contentbytes[0] = 0x81;
                contentbytes[1] = (byte)temp.length;
                array.copy(temp, 0, contentbytes, 2, temp.length);
            }
            else if (temp.length < 0xffff)
            {
                contentbytes = new byte[temp.length + 4];
                contentbytes[0] = 0x81;
                contentbytes[1] = 126;
                contentbytes[2] = (byte)(temp.length & 0xff);
                contentbytes[3] = (byte)(temp.length >> 8 & 0xff);
                array.copy(temp, 0, contentbytes, 4, temp.length);
            }
            else
            {
                // 暂不处理超长内容  
            }

            return contentbytes;
        }

客户端连接[网页测试]
<!doctype html>

websocket客户端示例

请输入一些文字

建立连接
发送数据
断开连接

<!doctype html>
<html>
<head>
<meta charset="utf-8" />
<title>websockets客户端示例</title>
</head>
<script>
var websocket;
function connect()
{
    try
    {
        var readystate = new array("正在连接","已建立连接","正在关闭连接","已关闭连接");
        var host = "ws://localhost:10";
        websocket = new websocket(host);
        var message = document.getelementbyid("message");
        message.innerhtml +="<p>socket状态：" + readystate[websocket.readystate] + "</p>";
        websocket.onopen = function()
        {
            message.innerhtml += "<p>socket状态：" + readystate[websocket.readystate] + "</p>";
        }
        websocket.onmessage = function(msg)
        {
            message.innerhtml +="<p>接收信息：" + msg.data + "</p>";
        }
        websocket.onclose=function()
        {
            message.innerhtml +="<p>socket状态：" + readystate[websocket.readystate] + "</p>";
        }
    }
    catch(exception)
    {
        message.innerhtml += "<p>有错误发生</p>";
    }
}
function send()
{
    var text = document.getelementbyid("text").value;
    var message = document.getelementbyid("message");
    if(text == "")
    {
        message.innerhtml += "<p>请输入一些文字</p>";
        return ;
    }
    try
    {
        websocket.send(text);
        message.innerhtml += "<p>发送数据：" +text + "</p>";
    }
    catch(exception)
    {
        message.innerhtml += "<p>发送数据出错</p>";
    }
    document.getelementbyid("text").value="";
}
function disconnect()
{
    websocket.close();
}
</script>
<body>
<h1>websocket客户端示例</h1>
<div id="message"></div>
<p>请输入一些文字</p>
<input id="text" type="text">
<button id="connect" onclick="connect();">建立连接</button>
<button id="send" onclick="send();">发送数据</button>
<button id="disconnect" onclick="disconnect();">断开连接</button>
</body>
</html>