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]

WebSockets客户端示例

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>

巴特西

C# Socket服务器及多客户端连接示例

WebSocket客户端示例

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