C# web代理 实例源码下载

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Net;using System.Net.Sockets;using System.IO;namespace HTTPProxy{ public class Proxy { Socket clientSocket; Byte[] read = new byte[1024]; //定义一个空间，存储来自客户端请求数据包 Byte[] Buffer = null; Encoding ASCII = Encoding.ASCII; //设定编码 Byte[] RecvBytes = new Byte[4096]; //定义一个空间，存储Web服务器返回的数据 public Proxy(Socket socket) { // // TODO: 在此处添加构造函数逻辑 // this.clientSocket = socket; } public void Run() { string clientmessage = " "; //存放来自客户端的HTTP请求字符串 string URL = " "; //存放解析出地址请求信息 int bytes = ReadMessage(read, ref clientSocket, ref clientmessage); if (bytes == 0) { return; } int index1 = clientmessage.IndexOf(' '); int index2 = clientmessage.IndexOf(' ', index1 1); if ((index1 == -1) || (index2 == -1)) { throw new IOException(); } string part1 = clientmessage.Substring(index1 1, index2 - index1); int index3 = part1.IndexOf('/', index1 8); int index4 = part1.IndexOf(' ', index1 8); int index5 = index4 - index3; URL = part1.Substring(index1 4, (part1.Length - index5) - 8); try { IPHostEntry IPHost = Dns.Resolve(URL); Console.WriteLine("远程主机名： " IPHost.HostName); string[] aliases = IPHost.Aliases; IPAddress[] address = IPHost.AddressList; Console.WriteLine("Web服务器IP地址：" address[0]); //解析出要访问的服务器地址 IPEndPoint ipEndpoint = new IPEndPoint(address[0], 80); Socket IPsocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); //创建连接Web服务器端的Socket对象 IPsocket.Connect(ipEndpoint); //Socket连Web接服务器 if (IPsocket.Connected) Console.WriteLine("Socket 正确连接！"); string GET = clientmessage; Byte[] ByteGet = ASCII.GetBytes(GET); IPsocket.Send(ByteGet, ByteGet.Length, 0); //代理访问软件对服务器端传送HTTP请求命令 Int32 rBytes = IPsocket.Receive(RecvBytes, RecvBytes.Length, 0); //代理访问软件接收来自Web服务器端的反馈信息 Console.WriteLine("接收字节数：" rBytes.ToString()); String strRetPage = null; strRetPage = strRetPage ASCII.GetString(RecvBytes, 0, rBytes); while (rBytes > 0) { rBytes = IPsocket.Receive(RecvBytes, RecvBytes.Length, 0); strRetPage = strRetPage ASCII.GetString(RecvBytes, 0, rBytes); } IPsocket.Shutdown(SocketShutdown.Both); IPsocket.Close(); SendMessage(clientSocket, strRetPage); //代理服务软件往客户端传送接收到的信息 } catch (Exception exc2) { Console.WriteLine(exc2.ToString()); } } //接收客户端的HTTP请求数据 private int ReadMessage(byte[] ByteArray, ref Socket s, ref String clientmessage) { int bytes = s.Receive(ByteArray, 1024, 0); string messagefromclient = Encoding.ASCII.GetString(ByteArray); clientmessage = (String)messagefromclient; return bytes; } //传送从Web服务器反馈的数据到客户端 private void SendMessage(Socket s, string message) { Buffer = new Byte[message.Length 1]; int length = ASCII.GetBytes(message, 0, message.Length, Buffer, 0); Console.WriteLine("传送字节数：" length.ToString()); s.Send(Buffer, length, 0); } }}