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Thread: Simple Proxy Server, Bypassing. Help

  1. #1
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    Default Simple Proxy Server, Bypassing. Help

    I'm creating a simple proxy server that is multi-threaded and will bypass all the host in the host array.
    Please help me to my code.

    I only want to use socket and streams for this:

    import java.io.*;
    import java.net.*;
    import java.util.*;
     
    public class ProxyServer extends Thread{
     
        private ServerSocket ss;
        private String[] host = {"www.google.com", "www.facebook.com"};
     
        private int remotePort = 80;
        public static long timeout = 30000;
     
        public ProxyServer(ServerSocket server) {
            this.ss = server;
        }
     
        public static void main(String[] args){
            try{
     
                System.out.println("Starting the Proxy Server..");
                ServerSocket ss = new ServerSocket(50005);
                System.out.println("Proxy server started at port " + ss.getLocalPort() + ".\r\n");
                for(int i = 0; i < 5; i++){
                    ProxyServer proxy = new ProxyServer(ss);
                    proxy.start();
                }
            }catch(Exception e){
                System.out.println(e);
            }
        }
     
        public void run(){
     
            try{
                Socket clientSocket = ss.accept();
                InputStream clientIn = clientSocket.getInputStream();
                OutputStream clientOut = new BufferedOutputStream(clientSocket.getOutputStream());
                for(int i = 0; i < host.length; i++){
                    try{
                        Socket serverSocket = new Socket(host[i], remotePort);
                        System.out.println("Open connection to: " + serverSocket + "(timeout= " + timeout + " ms)\r\n");
                        InputStream serverIn = serverSocket.getInputStream();
                        OutputStream serverOut = new BufferedOutputStream(serverSocket.getOutputStream());
                        OpenConnection oc = new OpenConnection(clientIn, serverIn, clientOut, serverOut, clientSocket, serverSocket);
                        oc.run();
                    }catch(Exception e){
                        System.out.println(e);
                    }       
                }   
            }catch(Exception e){
                System.out.println(e);
            }
        }
    }

    import java.io.*;
    import java.net.*;
    import java.util.*;
     
    public class OpenConnection extends Thread{
     
        InputStream clientIn;
        InputStream serverIn;
        OutputStream clientOut;
        OutputStream serverOut;
        Socket clientSocket;
        Socket serverSocket;
        int timeout = 30000;
     
        public OpenConnection(InputStream clientIn, InputStream serverIn, OutputStream clientOut, OutputStream serverOut, Socket c, Socket s) {
            this.clientIn = clientIn;
            this.serverIn = serverIn;
            this.clientOut = clientOut;
            this.serverOut = serverOut;
            this.clientSocket = c;
            this.serverSocket = s;
        }
     
        public void run(){
            int r0 = -1, r1 = -1, ch = -1, i = -1;
            long time0 = new Date().getTime();
            long time1 = new Date().getTime();
            try{
                while(r0 != 0 || r1 != 0 || (time1 - time0) <= timeout) {
                    while((r0 = clientIn.available()) > 0) {
                        ch = clientIn.read();
                            if(ch != -1) {
                                serverOut.write(ch);
                                System.out.print((char)ch);
                            }
                        time0 = new Date().getTime();
                        serverOut.flush();
                    }
                    while((r1 = serverIn.available()) > 0) {
                        try{
                            ch = serverIn.read();
                            if(ch != -1) {
                                clientOut.write(ch);
                            }
                            time0 = new Date().getTime();
                            clientOut.flush();
                        }catch(Exception e){
                        }   
                    }
                }
            }catch(Exception e){
                System.out.println(e);
            }finally{
                try{
                clientIn.close();
                clientOut.close();
                serverIn.close();
                serverOut.close();
                clientSocket.close();
                serverSocket.close();
                }catch(Exception e){
                    System.out.println(e);
                }
            }
        } 
    }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Simple Proxy Server, Bypassing. Help

    Cross posted at: Proxy Server Bypass Help

  3. The Following User Says Thank You to Norm For This Useful Post:

    Tjstretch (December 4th, 2011)

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