C# websocket 76协议简单应用

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服务器端源码：

76号协议增加了加密字段

sec-websocket-key1

sec-websocket-key2

以及最后8个字节

服务器必须在握手信息之后发送回解密信息才能握手成功。

解密方式

key1 是 sec-websocket-key1 后面所有字节

key2 是 sec-websocket-key2 后面所有字节

part1 为 key1内除去所有的非数字字符后得到的数字 long型 / key1内空字符长度 int型

part2 为 key2内除去所有的非数字字符后得到的数字 long型 / key1内空字符长度 int型

part1 转换为byte[] byte1 (例：byte1 = {1,2,3,4})

part2 转换为byte[] byte2

byte1、byte2内值倒转(例：byte1 = {4,3,2,1})

byte3 是客户端发送过来的最后8个字节

byte1、byte2、byte3 拼装为16个字节 byteKey[16]

byteKey[] 进行 MD5 加密得 byteMD5[]

byteMD5[] 放置在握手协议最后端发送回去

using System;using System.Collections.Generic;using System.Text;using System.Net;using System.Net.Sockets;using System.Security.Cryptography;using System.Web.Security;using System.IO;namespace Room{ class Program { static void Main(string[] args) { Console.WriteLine("服务器启动中..."); IPEndPoint ipe = new IPEndPoint(IPAddress.Parse("192.168.1.80"), 2000); Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); socket.Bind(ipe); socket.Listen(60); Console.WriteLine("服务器启动完毕..."); bool isfirst = true; bool run = true; try { Socket a = socket.Accept(); while (run) { byte[] bytes = new byte[1024]; int bytelength = a.Receive(bytes); Console.WriteLine("接收完毕。"); #region websocket握手 if (isfirst) { string recStr = Encoding.UTF8.GetString(bytes, 0, bytelength); string[] ss = recStr.Split(Environment.NewLine.ToCharArray()); string k1 = ss[10].Substring(20); string k2 = ss[12].Substring(20); byte[] last = new byte[8]; for (int i = 0; i < 8; i++) { last[i] = bytes[bytelength - 8 + i]; } uint key1 = (uint)(long.Parse(FilterNonNumber(k1)) / FilterNonEmpty(k1).Length); uint key2 = (uint)(long.Parse(FilterNonNumber(k2)) / FilterNonEmpty(k2).Length); byte[] byteTemp1 = BitConverter.GetBytes(key1); byte[] byteKey1 = new byte[4]; byte[] byteTemp2 = BitConverter.GetBytes(key2); byte[] byteKey2 = new byte[4]; for (int i = 0; i < 4; i++) { byteKey1[i] = byteTemp1[3 - i]; byteKey2[i] = byteTemp2[3 - i]; } MemoryStream ms = new MemoryStream(); ms.Write(byteKey1, 0, 4); ms.Write(byteKey2, 0, 4); ms.Write(last, 0, 8); ms.Flush(); byte[] byteMs = ms.ToArray(); ms.Dispose(); MD5 md5 = MD5.Create(); byte[] md = md5.ComputeHash(byteMs); MemoryStream ms1 = new MemoryStream(); string sendStr = "HTTP/1.1 101 WebSocket Protocol Handshake/r/nUpgrade: WebSocket/r/nConnection: Upgrade/r/nSec-WebSocket-Origin: null/r/nSec-WebSocket-Location: ws://192.168.1.80:2000//r/n/r/n"; byte[] temp = Encoding.UTF8.GetBytes(sendStr); ms1.Write(temp, 0, temp.Length); ms1.Write(md, 0, md.Length); ms1.Flush(); byte[] byteSend = ms1.ToArray(); ms1.Dispose(); a.Send(byteSend, byteSend.Length, 0); Console.WriteLine("发送完毕。"); isfirst = false; } #endregion else { if (bytelength > 2) { string recStr = Encoding.UTF8.GetString(bytes, 1, bytelength - 2); MemoryStream ms2 = new MemoryStream(); string strSend = "发送回去的是中文。"; byte[] byteSend = Encoding.UTF8.GetBytes(strSend); ms2.WriteByte(0); ms2.Write(byteSend, 0, byteSend.Length); ms2.WriteByte(255); ms2.Flush(); a.Send(ms2.ToArray()); ms2.Dispose(); if (recStr.Equals("exit")) { run = false; Console.WriteLine("用户已退出。"); } else { Console.WriteLine("接收到：" + recStr); } } else { run = false; Console.WriteLine("用户已退出。"); } } } Console.ReadLine(); a.Close(); socket.Close(); } catch (Exception e) { Console.WriteLine(e.Message); } finally { socket.Close(); } } public static string FilterNonNumber(string str) { if (str == null) { return ""; } char[] c = str.ToCharArray(); StringBuilder sb = new StringBuilder(); for (int i = 0, len = c.Length; i < len; i++) { if (char.IsNumber(c[i])) { sb.Append(c[i]); } } return sb.ToString(); } public static string FilterNonEmpty(string str) { if (str == null) { return " "; } char[] c = str.ToCharArray(); StringBuilder sb = new StringBuilder(); for (int i = 0, len = c.Length; i < len; i++) { if (c[i] == ' ') { sb.Append(c[i]); } } if (sb.ToString().Length == 0) { return " "; } else { return sb.ToString(); } } }}

网页不解释。

<!DOCTYPE html><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>1</title><mce:script type="text/javascript"></mce:script></head><body style="text-align:center;" mce_style="text-align:center;"><input type="button" value="点我" onclick="display()"/><br /><input type="text" id="txtSend" /><input type="button" id="btnSend" value="发送" onclick="wssend()"/></body></html>

C# websocket 76协议 简单应用

C# websocket 76协议简单应用