/*
	The Browser Snooper Server
		by Jim Mach
*/


import java.applet.*;
import java.io.*;
import java.net.*;




public class BrowserServer extends Applet implements Runnable 
{
   final int DEFAULT_PORT = 6780;
   Thread browserserver_thread = null;
   ErrorHandler error = new ErrorHandler();

   ServerSocket listen_socket;
   Socket client_socket;

   static public void main(String[] args)
   {
      BrowserServer bs = new BrowserServer();
      bs.init();
      bs.start();
   }


   public void init()
   {
      try { listen_socket = new ServerSocket(DEFAULT_PORT); }
      catch(IOException e) {error.ShowError(e, "Error in init()");}
   }

   public void destroy()
   {
      try { client_socket.close(); listen_socket.close(); }
      catch(IOException e) {}
   }

   public void start()
   {
      if (browserserver_thread == null)
      {
         browserserver_thread = new Thread(this);
         browserserver_thread.start();
      }
   }

   public void stop()
   {
      if ((browserserver_thread != null) && (browserserver_thread.isAlive()))
      {
         browserserver_thread.stop();
         browserserver_thread = null;
      }
   }


   public void run()
   {
      Connection conn;

      try {
         while(true)
         {
            client_socket = listen_socket.accept();
            conn = new Connection(client_socket, listen_socket);
         }
      }
      catch(IOException e) {error.ShowError(e, "Error in run()");}
   }

}   



class Connection extends Thread
{
   final char COMM_DELIMETER = 144;
   final String FILE_NAME = "OUT.TXT";
   Socket conn;
   ServerSocket client_conn;
   DataInputStream data_in;
   PrintStream data_out;
   ClientInfo client_info = new ClientInfo();
   ErrorHandler error = new ErrorHandler();

   public Connection(Socket client_socket, ServerSocket listen_socket)
   {
      conn = client_socket;
      client_conn = listen_socket;

      try {
         data_in = new DataInputStream(conn.getInputStream());
         data_out = new PrintStream(conn.getOutputStream());
      }
      catch(IOException e) {error.ShowError(e, "Error in Connection()");}
      start();
   }


   public void run()
   {
      ReceiveInfo();
      SendInfo();
      SaveInfo();

      destroy();
   }

   public void destroy()
   {
      try { conn.close(); }
      catch(IOException e) {}
   }


   public void ReceiveInfo()
   {
      String response = null;

      try {response = data_in.readLine();}
      catch(IOException e) {error.ShowError(e, "Error in ReceiveInfo()");}

      client_info.UnFormatInfo(response, COMM_DELIMETER);
  }


   public void SendInfo()
   {
      client_info.GetInfo(client_conn);
//      try {
data_out.println(client_info.FormatInfo(COMM_DELIMETER));
//}
//      catch(IOException e) {error.ShowError(e, "Error in SendInfo()");}
   }


   public void SaveInfo()
   {
      try {
         RandomAccessFile output_file =  new RandomAccessFile(FILE_NAME, "rw");
         output_file.seek(output_file.length());
         output_file.writeBytes(client_info.FormatInfo('\n'));
         output_file.close();
      }
      catch (IOException e) {error.ShowError(e, "Error in SaveInfo()");}
   }

}