C#WebSocket初学者必备

C# WebSocket 服务端和网页端示例，初学者必备！

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Net;
using System.Net.Sockets;
using System.Text.Regularexpressions;
using System.Security.Cryptography;

namespace WebSocketServer
{
    class Program
    {
        static void Main（string[] args）
        {
            int port = 1818;
            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....“）;
                Socket sc = listener.Accept（）;//接受一个连接
                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）））;
                Console.WriteLine（“已经发送握手协议了....“）;

                //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 = “您好，“ + clientMsg;
                Console.WriteLine（“发送数据：““ + sendMsg + “” 至客户端....“）;
                sc.Send（PackData（sendMsg））;

                Console.WriteLine（“演示Over!“）;

            }
            catch （Exception e）
            {
                Console.WriteLine（e.ToString（））;
            }
        }

        /// 

        /// 打包握手信息
        /// 

        /// Sec-WebSocket-Accept
        /// 数据包
        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）;
            //如果把上一行换成下面两行，才是thewebsocketprotocol-17协议，但居然握手不成功，目前仍没弄明白！
            //responseBuilder.Append（“Sec-WebSocket-Accept: “ + secKeyAccept + Environment.NewLine）;
            //responseBuilder.Append（“Sec-WebSocket-Protocol: chat“ + Environment.NewLine）;

            return Encoding.UTF8.GetBytes（responseBuilder.ToString（））;
        }

        /// 

        /// 生成Sec-WebSocket-Accept
        /// 

        /// 客户端握手信息
        /// Sec-WebSock

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     文件        1593  2016-03-02 15:35  websocketclient.html
     目录           0  2016-03-02 15:39  WebSocketServer\
     目录           0  2016-03-02 15:39  WebSocketServer\bin\
     目录           0  2016-03-02 15:39  WebSocketServer\bin\Debug\
     文件        7680  2016-03-02 15:32  WebSocketServer\bin\Debug\WebSocketServer.exe
     文件       17920  2016-03-02 15:32  WebSocketServer\bin\Debug\WebSocketServer.pdb
     文件       11600  2016-03-02 15:33  WebSocketServer\bin\Debug\WebSocketServer.vshost.exe
     文件         490  2010-03-17 22:39  WebSocketServer\bin\Debug\WebSocketServer.vshost.exe.manifest
     目录           0  2016-03-02 15:39  WebSocketServer\obj\
     目录           0  2016-03-02 15:39  WebSocketServer\obj\x86\
     目录           0  2016-03-02 15:39  WebSocketServer\obj\x86\Debug\
     文件        5869  2016-03-02 15:32  WebSocketServer\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache
     目录           0  2016-03-02 09:50  WebSocketServer\obj\x86\Debug\TempPE\
     文件         312  2016-03-02 15:33  WebSocketServer\obj\x86\Debug\WebSocketServer.csproj.FileListAbsolute.txt
     文件        7680  2016-03-02 15:32  WebSocketServer\obj\x86\Debug\WebSocketServer.exe
     文件       17920  2016-03-02 15:32  WebSocketServer\obj\x86\Debug\WebSocketServer.pdb
     文件        7584  2016-03-02 15:32  WebSocketServer\Program.cs
     目录           0  2016-03-02 15:39  WebSocketServer\Properties\
     文件        1362  2016-03-02 09:50  WebSocketServer\Properties\AssemblyInfo.cs
     文件        2451  2016-03-02 09:52  WebSocketServer\WebSocketServer.csproj