Java实现Socket5代理服务器

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直接贴代码,不解释

1 主服务,用来侦听端口

package org.javaren.proxy;
import java.net.ServerSocket;
import java.net.Socket;
public class SocketProxy {
	/**
* @param args
*/
	public static void main(String[] args) throws Exception {
ServerSocket serverSocket = new ServerSocket(8888);
while (true) {
Socket socket = null;
try {
socket = serverSocket.accept();
new SocketThread(socket).start();
} catch (Exception e) {
e.printStackTrace();
}
}
	}
}

2 核心代码,处理链接的代理线程

内部设计了Socket的认证,自己看吧

package org.javaren.proxy;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
public class SocketThread extends Thread {
	private Socket socketIn;
	private InputStream isIn;
	private OutputStream osIn;
	//
	private Socket socketOut;
	private InputStream isOut;
	private OutputStream osOut;
public SocketThread(Socket socket) {
this.socketIn = socket;
	}
private byte[] buffer = new byte[4096];
	private static final byte[] VER = { 0x5, 0x0 };
	private static final byte[] CONNECT_OK = { 0x5, 0x0, 0x0, 0x1, 0, 0, 0, 0, 0, 0 };
public void run() {
try {
System.out.println("\n\na client connect " + socketIn.getInetAddress() + ":" + socketIn.getPort());
isIn = socketIn.getInputStream();
osIn = socketIn.getOutputStream();
int len = isIn.read(buffer);
System.out.println("< " + bytesToHexString(buffer, 0, len));
osIn.write(VER);
osIn.flush();
System.out.println("> " + bytesToHexString(VER, 0, VER.length));
len = isIn.read(buffer);
System.out.println("< " + bytesToHexString(buffer, 0, len));
// 查找主机和端口
String host = findHost(buffer, 4, 7);
int port = findPort(buffer, 8, 9);
System.out.println("host=" + host + ",port=" + port);
socketOut = new Socket(host, port);
isOut = socketOut.getInputStream();
osOut = socketOut.getOutputStream();
//
for (int i = 4; i <= 9; i++) {
CONNECT_OK[i] = buffer[i];
}
osIn.write(CONNECT_OK);
osIn.flush();
System.out.println("> " + bytesToHexString(CONNECT_OK, 0, CONNECT_OK.length));
SocketThreadOutput out = new SocketThreadOutput(isIn, osOut);
out.start();
SocketThreadInput in = new SocketThreadInput(isOut, osIn);
in.start();
out.join();
in.join();
} catch (Exception e) {
System.out.println("a client leave");
} finally {
try {
if (socketIn != null) {
socketIn.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
System.out.println("socket close");
	}
public static String findHost(byte[] bArray, int begin, int end) {
StringBuffer sb = new StringBuffer();
for (int i = begin; i <= end; i++) {
sb.append(Integer.toString(0xFF & bArray[i]));
sb.append(".");
}
sb.deleteCharAt(sb.length() - 1);
return sb.toString();
	}
public static int findPort(byte[] bArray, int begin, int end) {
int port = 0;
for (int i = begin; i <= end; i++) {
port <<= 16;
port += bArray[i];
}
return port;
	}
// 4A 7D EB 69
	// 74 125 235 105
	public static final String bytesToHexString(byte[] bArray, int begin, int end) {
StringBuffer sb = new StringBuffer(bArray.length);
String sTemp;
for (int i = begin; i < end; i++) {
sTemp = Integer.toHexString(0xFF & bArray[i]);
if (sTemp.length() < 2)
sb.append(0);
sb.append(sTemp.toUpperCase());
sb.append(" ");
}
return sb.toString();
	}
}


3  读取线程,负责外面读数据,写入到请求端

package org.javaren.proxy;
/**
 * * 从外部读取,向内部发送信息
 */
import java.io.InputStream;
import java.io.OutputStream;
public class SocketThreadInput extends Thread {
	private InputStream isOut;
	private OutputStream osIn;
public SocketThreadInput(InputStream isOut, OutputStream osIn) {
this.isOut = isOut;
this.osIn = osIn;
	}
private byte[] buffer = new byte[409600];
public void run() {
try {
int len;
while ((len = isOut.read(buffer)) != -1) {
if (len > 0) {
System.out.println(new String(buffer, 0, len));
osIn.write(buffer, 0, len);
osIn.flush();
}
}
} catch (Exception e) {
System.out.println("SocketThreadInput leave");
}
	}
}

4 写入线程,负责读取请求端数据,写入到目标端

package org.javaren.proxy;
import java.io.InputStream;
import java.io.OutputStream;
/**
 * 从内部读取,向外部发送信息
 *
* @author zxq
 *
*/
public class SocketThreadOutput extends Thread {
	private InputStream isIn;
	private OutputStream osOut;
public SocketThreadOutput(InputStream isIn, OutputStream osOut) {
this.isIn = isIn;
this.osOut = osOut;
	}
private byte[] buffer = new byte[409600];
public void run() {
try {
int len;
while ((len = isIn.read(buffer)) != -1) {
if (len > 0) {
System.out.println(new String(buffer, 0, len));
osOut.write(buffer, 0, len);
osOut.flush();
}
}
} catch (Exception e) {
System.out.println("SocketThreadOutput leave");
}
	}
}

 

效果还不错,用firefox/ ie都测试过,可用。

转自:http://blog.csdn.net/java2000_net/article/details/7826660

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