foo.java

/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */

import com.jcraft.jsch.*;
import java.awt.*;
import javax.swing.*;
import java.io.*;

public class foo {
  public static void main(String[] arg){
    
    try{
      JSch jsch=new JSch();

      String host=null;
      if(arg.length>0){
        host=arg[0];
      }
      else{
        host=JOptionPane.showInputDialog("Enter username@hostname",
                                         System.getProperty("user.name")+
                                         "@localhost"); 
      }
      String user=host.substring(0, host.indexOf('@'));
      host=host.substring(host.indexOf('@')+1);

      Session session=jsch.getSession(user, host, 22);

      String passwd = JOptionPane.showInputDialog("Enter password");
      session.setPassword(passwd);

      UserInfo ui = new MyUserInfo(){
        public void showMessage(String message){
          JOptionPane.showMessageDialog(null, message);
        }
        public boolean promptYesNo(String message){
          Object[] options={ "yes", "no" };
          int foo=JOptionPane.showOptionDialog(null, 
                                               message,
                                               "Warning", 
                                               JOptionPane.DEFAULT_OPTION, 
                                               JOptionPane.WARNING_MESSAGE,
                                               null, options, options[0]);
          return foo==0;
        }
      };

      session.setUserInfo(ui);

      session.setConfig("compression.s2c", "[email protected],zlib,none");
      session.setConfig("compression.c2s", "[email protected],zlib,none");
      session.setConfig("compression_level", "9");

      session.connect(30000);

      String file=JOptionPane.showInputDialog("Enter file", "");

      Channel channel=session.openChannel("shell");
      ((ChannelShell)channel).setPty(false);

      InputStream in = channel.getInputStream();
      OutputStream out = channel.getOutputStream();

      String command="cat "+file+"\n;exit\n";
      System.out.println("command: "+command);

      channel.connect(3*1000);

      out.write(command.getBytes());
      out.flush();

      File tempFile = File.createTempFile("foo","bar");
      FileOutputStream fout = new FileOutputStream(tempFile);

      byte[] tmp=new byte[102400];
      while(true){
        int i=in.read(tmp, 0, tmp.length);
        if(i<0)break;
        fout.write(tmp, 0, i);
      }

      fout.close();

      System.out.println("file: "+tempFile.getAbsolutePath());

      channel.disconnect();
      session.disconnect();

    }
    catch(Exception e){
      System.out.println(e);
    }
  }

  public static abstract class MyUserInfo
                          implements UserInfo, UIKeyboardInteractive{
    public String getPassword(){ return null; }
    public boolean promptYesNo(String str){ return false; }
    public String getPassphrase(){ return null; }
    public boolean promptPassphrase(String message){ return false; }
    public boolean promptPassword(String message){ return false; }
    public void showMessage(String message){ }
    public String[] promptKeyboardInteractive(String destination,
                                              String name,
                                              String instruction,
                                              String[] prompt,
                                              boolean[] echo){
      return null;
    }
  }
}

Shell.java

/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */

import com.jcraft.jsch.*;
import java.awt.*;
import javax.swing.*;
import java.io.*;
import java.util.zip.GZIPInputStream;

public class Shell{
  public static void main(String[] arg){
    
    try{
      JSch jsch=new JSch();

      String host=null;
      if(arg.length>0){
        host=arg[0];
      }
      else{
        host=JOptionPane.showInputDialog("Enter username@hostname",
                                         System.getProperty("user.name")+
                                         "@localhost"); 
      }
      String user=host.substring(0, host.indexOf('@'));
      host=host.substring(host.indexOf('@')+1);

      Session session=jsch.getSession(user, host, 22);

      String passwd = JOptionPane.showInputDialog("Enter password");
      session.setPassword(passwd);

      UserInfo ui = new MyUserInfo(){
        public void showMessage(String message){
          JOptionPane.showMessageDialog(null, message);
        }
        public boolean promptYesNo(String message){
          Object[] options={ "yes", "no" };
          int foo=JOptionPane.showOptionDialog(null, 
                                               message,
                                               "Warning", 
                                               JOptionPane.DEFAULT_OPTION, 
                                               JOptionPane.WARNING_MESSAGE,
                                               null, options, options[0]);
          return foo==0;
        }
      };

      session.setUserInfo(ui);

      session.connect(30000);

      String file=JOptionPane.showInputDialog("Enter file", "");

      Channel channel=session.openChannel("shell");
      ((ChannelShell)channel).setPty(false);

      InputStream in = channel.getInputStream();
      OutputStream out = channel.getOutputStream();

      String command="gzip -c "+file+"\n;exit\n";
      System.out.println("command: "+command);

      channel.connect(3*1000);

      out.write(command.getBytes());
      out.flush();

      InputStream gin = new GZIPInputStream(in);
      File tempFile = File.createTempFile("foo","bar");
      FileOutputStream fout = new FileOutputStream(tempFile);

      byte[] tmp=new byte[102400];
      while(true){
        int i=gin.read(tmp, 0, tmp.length);
        if(i<0)break;
        fout.write(tmp, 0, i);
      }

      fout.close();

      System.out.println("file: "+tempFile.getAbsolutePath());

      channel.disconnect();
      session.disconnect();

    }
    catch(Exception e){
      System.out.println(e);
    }
  }

  public static abstract class MyUserInfo
                          implements UserInfo, UIKeyboardInteractive{
    public String getPassword(){ return null; }
    public boolean promptYesNo(String str){ return false; }
    public String getPassphrase(){ return null; }
    public boolean promptPassphrase(String message){ return false; }
    public boolean promptPassword(String message){ return false; }
    public void showMessage(String message){ }
    public String[] promptKeyboardInteractive(String destination,
                                              String name,
                                              String instruction,
                                              String[] prompt,
                                              boolean[] echo){
      return null;
    }
  }
}