Problem with FTPClient??

[Bikash Paul]

Hi all friends,
I am developing one FTP client for uploading and downloading file to and from my webserver but when Iam trying to upload and download file then my FTP client connected to host and showing me user login OK but after that it is giving me 'Error:sun.net.ftp.FTPProtocolException'.I have tried to find it out why it is giving me error but couldn't.Can any one plz try with my code and help me to slove my problem.Below r my codes.

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;
import java.net.*;
import java.lang.reflect.*;
import sun.net.ftp.*;
import sun.net.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
public class FTPApp extends JFrame
{
public static int BUFFER_SIZE = 1024;

protected JTextField m_txtUser;
protected JPasswordField m_txtPassword;
protected JTextField m_txtURL;
protected JTextField m_txtFile;
protected JTextArea m_monitor;
protected JProgressBar m_progress;
protected JButton m_btPut;
protected JButton m_btGet;
protected JButton m_btFile;
protected JButton m_btClose;
protected JFileChooser m_chooser;
protected FtpClient m_client;
protected String m_sLocalFile;
protected String m_sHostFile;
public FTPApp() {
super("Web Spinner FTP Client");
Toolkit test = Toolkit.getDefaultToolkit();
Image myImage = test.getImage("images/right.gif");
setIconImage(myImage);
JPanel p = new JPanel();
p.setLayout(new BorderLayout(10,15));
p.setBackground(new Color(212,218,179));
m_txtUser = new JTextField("anonymous");
m_txtPassword = new JPasswordField(30);
m_txtURL = new JTextField(30);
m_txtFile = new JTextField(30);
m_monitor = new JTextArea(5, 20);
m_monitor.setEditable(false);
JScrollPane ps = new JScrollPane(m_monitor);
m_progress = new JProgressBar();
m_progress.setStringPainted(true);
m_progress.setBorder(new BevelBorder(BevelBorder.LOWERED,Color.white, Color.gray));
m_progress.setMinimum(0);
JPanel p1 = new JPanel(new BorderLayout());
m_btPut = new JButton("Put");
ActionListener lst = new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (connect()) {
Thread uploader = new Thread() {
public void run() {
putFile();
disconnect();
}
};
uploader.start();
}
}
};
m_btPut.addActionListener(lst);
m_btPut.setMnemonic('p');
m_btGet = new JButton("Get");
lst = new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (connect()) {
Thread downloader = new Thread() {
public void run() {
getFile();
disconnect();
}
};
downloader.start();
}
}
};
m_btGet.addActionListener(lst);
m_btGet.setMnemonic('g');
m_btFile = new JButton("File");
lst = new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (m_chooser.showSaveDialog(FTPApp.this) !=
JFileChooser.APPROVE_OPTION)
return;
File f = m_chooser.getSelectedFile();
m_txtFile.setText(f.getPath());
}
};
m_btFile.addActionListener(lst);
m_btFile.setMnemonic('f');
m_btClose = new JButton("Close");
lst = new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (m_client != null)
disconnect();
else
System.exit(0);
}
};
m_btClose.addActionListener(lst);
m_btClose.setDefaultCapable(true);
m_btClose.setMnemonic('g');
getContentPane().add(p, BorderLayout.CENTER);
m_chooser = new JFileChooser();
m_chooser.setCurrentDirectory(new File("."));
m_chooser.setApproveButtonToolTipText(
"Select file for upload/download");
//creating layout
JPanel top = new JPanel(new GridLayout(4,1,0,8));
JPanel pan1 = new JPanel(new BorderLayout(3,3));
JLabel userpanel=new JLabel("User Name:    ");
pan1.add(userpanel,BorderLayout.WEST);
pan1.add(m_txtUser,BorderLayout.CENTER);
m_txtUser.setBackground(Color.white);
JPanel pan2 = new JPanel(new BorderLayout(3,3));
JLabel passpanel=new JLabel("Password:     ");
pan2.add(passpanel,BorderLayout.WEST);
pan2.add(m_txtPassword,BorderLayout.CENTER);
m_txtPassword.setBackground(Color.white);
JPanel pan3 = new JPanel(new BorderLayout(3,3));
JLabel urlpanel=new JLabel("Url:                   ");
pan3.add(urlpanel,BorderLayout.WEST);
pan3.add(m_txtURL,BorderLayout.CENTER);
m_txtURL.setBackground(Color.white);
JPanel pan4 = new JPanel(new BorderLayout(3,3));
JLabel filepanel=new JLabel("File:                  ");
pan4.add(filepanel,BorderLayout.WEST);
pan4.add(m_txtFile,BorderLayout.CENTER);
m_txtFile.setBackground(Color.white);
m_txtFile.setText("");
top.add(pan1);
top.add(pan2);
top.add(pan3);
top.add(pan4);
JPanel pan5 = new JPanel(new BorderLayout(0,12));
m_monitor.setSize(800,500);
ps.setSize(800,500);
pan5.add(ps,BorderLayout.CENTER);
pan5.add(m_progress,BorderLayout.SOUTH);
JPanel pan7 = new JPanel(new GridLayout(1,4));
pan7.add(m_btPut);
pan7.add(m_btGet);
pan7.add(m_btFile);
pan7.add(m_btClose);
pan1.setBackground(new Color(212,218,179));
pan2.setBackground(new Color(212,218,179));
pan3.setBackground(new Color(212,218,179));
pan4.setBackground(new Color(212,218,179));
top.setBackground(new Color(212,218,179));
pan5.setBackground(new Color(212,218,179));
top.setBackground(new Color(212,218,179));
pan7.setBackground(new Color(212,218,179));
p.add(top,BorderLayout.NORTH);
p.add(pan5,BorderLayout.CENTER);
p.add(pan7,BorderLayout.SOUTH);
m_monitor.setBackground(Color.white);
WindowListener wndCloser = new WindowAdapter() {
public void windowClosing(WindowEvent e) {
disconnect();
System.exit(0);
}
};
addWindowListener(wndCloser);
setSize(500,500);
setResizable(false);
setVisible(true);
setLocation(220,130);
setBackground(new Color(212,218,179));
}
public Insets getInsets(){
            return new Insets(50,10,50,10);
               }
public void setButtonStates(boolean state) {
m_btPut.setEnabled(state);
m_btGet.setEnabled(state);
m_btFile.setEnabled(state);
}
protected boolean connect() {
m_monitor.setText("");
setButtonStates(false);
m_btClose.setText("Cancel");
setCursor(Cursor.getPredefinedCursor(
Cursor.WAIT_CURSOR));
String user = m_txtUser.getText();
if (user.length()==0) {
message("Please enter user name");
setButtonStates(true);
return false;
}
String password = new String(m_txtPassword.getPassword());
String sUrl = m_txtURL.getText();
if (sUrl.length()==0) {
message("Please enter URL");
setButtonStates(true);
return false;
}
m_sLocalFile = m_txtFile.getText();
// Parse URL
int index = sUrl.indexOf("//");
if (index >= 0)
sUrl = sUrl.substring(index+2);
index = sUrl.indexOf("/");
String host = sUrl.substring(0, index);
sUrl = sUrl.substring(index+1);
String sDir = "";
index = sUrl.lastIndexOf("/");
if (index >= 0) {
sDir = sUrl.substring(0, index);
sUrl = sUrl.substring(index+1);
}
m_sHostFile = sUrl;
try {
message("Connecting to host "+host);
m_client = new FtpClient(host);
m_client.login(user, password);
message("User "+user+" login OK");
message(m_client.welcomeMsg);
m_client.cd(sDir);
message("Directory: "+sDir);
m_client.binary();
return true;
}
catch (Exception ex) {
message("Error: "+ex.toString());
setButtonStates(true);
return false;
}
}
protected void disconnect() {
if (m_client != null) {
try { m_client.closeServer(); }
catch (IOException ex) {}
m_client = null;
}
Runnable runner = new Runnable() {
public void run() {
m_progress.setValue(0);
setButtonStates(true);
m_btClose.setText("Close");
FTPApp.this.setCursor(Cursor.getPredefinedCursor(
Cursor.DEFAULT_CURSOR));
}
};
SwingUtilities.invokeLater(runner);
}
protected void getFile() {
if (m_sLocalFile.length()==0) {
m_sLocalFile = m_sHostFile;
SwingUtilities.invokeLater( new Runnable() {
public void run() {
m_txtFile.setText(m_sLocalFile);
}
});
}
byte[] buffer = new byte[BUFFER_SIZE];
try {
int size = getFileSize(m_client, m_sHostFile);
if (size > 0) {
message("File " + m_sHostFile + ": " + size + " bytes");
setProgressMaximum(size);
}
else
message("File " + m_sHostFile + ": size unknown");
FileOutputStream out = new
FileOutputStream(m_sLocalFile);
InputStream in = m_client.get(m_sHostFile);
int counter = 0;
while(true) {
int bytes = in.read(buffer);
if (bytes < 0)
break;
out.write(buffer, 0, bytes);
counter += bytes;
if (size > 0) {
setProgressValue(counter);
int proc = (int) Math.round(m_progress.
getPercentComplete() * 100);
setProgressString(proc + " %");
}
else {
int kb = counter/1024;
setProgressString(kb + " KB");
}
}
out.close();
in.close();
}
catch (Exception ex) {
message("Error: "+ex.toString());
}
}
protected void putFile() {
if (m_sLocalFile.length()==0) {
message("Please enter file name");
}
byte[] buffer = new byte[BUFFER_SIZE];
try {
File f = new File(m_sLocalFile);
int size = (int)f.length();
message("File " + m_sLocalFile + ": " + size + " bytes");
setProgressMaximum (size);
FileInputStream in = new FileInputStream(m_sLocalFile);
OutputStream out = m_client.put(m_sHostFile);
int counter = 0;
while(true) {
int bytes = in.read(buffer);
if (bytes < 0)
break;
out.write(buffer, 0, bytes);
counter += bytes;
setProgressValue(counter);
int proc = (int) Math.round(m_progress.getPercentComplete() * 100);
setProgressString(proc + " %");
}
out.close();
in.close();
}
catch (Exception ex) {
message("Error: " + ex.toString());
}
}
protected void message(final String str) {
if (str != null) {
Runnable runner = new Runnable() {
public void run() {
m_monitor.append(str + '\n');
m_monitor.repaint();
}
};
SwingUtilities.invokeLater(runner);
}
}
protected void setProgressValue(final int value) {
Runnable runner = new Runnable() {
public void run() {
m_progress.setValue(value);
}
};
SwingUtilities.invokeLater(runner);
}
protected void setProgressMaximum(final int value) {
Runnable runner = new Runnable() {
public void run() {
m_progress.setMaximum(value);
}
};
SwingUtilities.invokeLater(runner);
}
protected void setProgressString(final String string) {
Runnable runner = new Runnable() {
public void run() {
m_progress.setString(string);
}
};
SwingUtilities.invokeLater(runner);
}
public static void main(String argv[]) {
new FTPApp();
}

public static int getFileSize(FtpClient client, String fileName)
throws IOException {
TelnetInputStream lst = client.list();
String str = "";
fileName = fileName.toLowerCase();
while(true) {
int c = lst.read();
char ch = (char) c;
if (c < 0 || ch == '\n') {
str = str.toLowerCase();
if (str.indexOf(fileName) >= 0) {
StringTokenizer tk = new StringTokenizer(str);
int index = 0;
while(tk.hasMoreTokens()) {
String token = tk.nextToken();
if (index == 4)
try {
return Integer.parseInt(token);
}
catch (NumberFormatException ex) {
return -1;
}
index++;
}
}
str = "";
}
if (c <= 0)
break;
str += ch;
}
return -1;
}
}

Regards
Bikash
[ July 25, 2003: Message edited by: Bikash Paul ]

[zb cong]

hi
the sun package is not supported,why don't you use the appache commons net package to write the ftp program.

[Bikash Paul]

Hi,
Why Sun net package not supported?Can u plz give me link of appache commons net package so that I can use that to write my Ftp program
Regards
Bikash
[ July 26, 2003: Message edited by: Bikash Paul ]

[Bikash Paul]

Hi,
Now I have modified my putFile() method's code but still Iam getting below Error.Can any one plz guide me where Iam doing wrong.
Connecting to host www.kdkinfotech.com
User kmrraj login OK
Directory: img
File C:\config_file.txt: 796 bytes
The value of m_sHostFile:C:\config_file.txt
Error from put method: sun.net.ftp.FtpProtocolException: STOR config_file.txt
Modified code of putFile() method:-

protected void putFile() {
if (m_sLocalFile.length()==0) {
message("Please enter file name");
}
byte[] buffer = new byte[BUFFER_SIZE];
try {
File f = new File(m_sLocalFile);
int size = (int)f.length();
String sTargetFileName=f.getName();
message("File " + m_sLocalFile + ": " + size + " bytes");
setProgressMaximum (size);
BufferedInputStream bReader = null;
InputStream in = new FileInputStream(m_sLocalFile);
bReader = new BufferedInputStream(in);
OutputStream out = m_client.put(sTargetFileName);
BufferedOutputStream bout = new BufferedOutputStream(out);
int counter = 0;
int readcount=0;
while((readcount = bReader.read(buffer)) > 0){
bout.write(buffer, 0, readcount);
counter += readcount;
setProgressValue(counter);
int proc = (int) Math.round(m_progress.getPercentComplete() * 100);
setProgressString(proc + " %");
}
in.close();
bReader.close();
out.flush();
out.close();
bout.flush();
bout.close();
}
catch (Exception ex) {
message("Error from put method: " + ex.toString());
}
}

Regards
Bikash
[ July 26, 2003: Message edited by: Bikash Paul ]