Master of Science thesis Fighting Spam

10.1.6 Proxy
10.1.6.a AbstractBlokingProxy
package SpamCash.Client.Proxy;
import SpamCash.Utilities.*;
import SpamCash.Utilities.Debugger;
import SpamCash.Client.Control;
import java.util.*;
import java.net.*;
import java.io.*;
public class AbstractBlockingProxy extends Thread
{
/* Pointer to control class */
protected Control control;
/** Writer to sent data to the client/server */
private PrintWriter clientOut, serverOut;
/** Reader to read data from the client/server */
private BufferedReader clientIn;
private BufferedReader serverIn;
/** Socket connection to the server */
private Socket serverSocket, clientSocket;
/** The server socket used to listen for incoming connections */
protected ServerSocket listenSocket;
/** The IP address of the client */
private String clientIp, serverIp;
protected int port;
protected AbstractBlockingProxy(Control control, int port) throws Exception
{
this.control = control;
this.port = port;
startProxy();
}
public void startProxy() throws Exception
{
Debugger.debug(getClass(), 1, "Proxy is initializing...");
}
try
{
this.listenSocket = new ServerSocket(port);
}
catch(Exception e)
{
throw new Exception(" Could not create Serversocket - port " + port
+ " is in use.");
}
Debugger.debug(getClass(), 1,
"Proxy is ready on port " + port);
protected void initClientStreams(Socket clientSocket) throws Exception
{
this.clientSocket = clientSocket;
this.clientSocket.setSoTimeout(200);
//Prepare the input and output streams.
clientOut = new PrintWriter(clientSocket.getOutputStream(), true);
clientIn = new BufferedReader(new InputStreamReader(
clientSocket.getInputStream()));
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