String server1, username1, password1, file1;
String server2, username2, password2, file2;
FTPClient ftp1, ftp2;
ProtocolCommandListener listener;
if (args.length < 8)
{
System.err.println(
"Usage: ftp <host1> <user1> <pass1> <file1> <host2> <user2> <pass2> <file2>"
);
System.exit(1);
}
server1 = args[0];
username1 = args[1];
password1 = args[2];
file1 = args[3];
server2 = args[4];
username2 = args[5];
password2 = args[6];
file2 = args[7];
listener = new PrintCommandListener(new PrintWriter(System.out));
ftp1 = new FTPClient();
ftp1.addProtocolCommandListener(listener);
ftp2 = new FTPClient();
ftp2.addProtocolCommandListener(listener);
try
{
int reply;
ftp1.connect(server1);
System.out.println("Connected to " + server1 + ".");
reply = ftp1.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply))
{
ftp1.disconnect();
System.err.println("FTP server1 refused connection.");
System.exit(1);
}
}
catch (IOException e)
{
if (ftp1.isConnected())
{
try
{
ftp1.disconnect();
}
catch (IOException f)
{
// do nothing
}
}
System.err.println("Could not connect to server1.");
e.printStackTrace();
System.exit(1);
}
try
{
int reply;
ftp2.connect(server2);
System.out.println("Connected to " + server2 + ".");
reply = ftp2.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply))
{
ftp2.disconnect();
System.err.println("FTP server2 refused connection.");
System.exit(1);
}
}
catch (IOException e)
{
if (ftp2.isConnected())
{
try
{
ftp2.disconnect();
}
catch (IOException f)
{
// do nothing
}
}
System.err.println("Could not connect to server2.");
e.printStackTrace();
System.exit(1);
}
__main:
try
{
if (!ftp1.login(username1, password1))
{
System.err.println("Could not login to " + server1);
break __main;
}
if (!ftp2.login(username2, password2))
{
System.err.println("Could not login to " + server2);
break __main;
}
// Let's just assume success for now.
ftp2.enterRemotePassiveMode();
ftp1.enterRemoteActiveMode(InetAddress.getByName(ftp2.getPassiveHost()),
ftp2.getPassivePort());
// Although you would think the store command should be sent to server2
// first, in reality, ftp servers like wu-ftpd start accepting data
// connections right after entering passive mode. Additionally, they
// don't even send the positive preliminary reply until after the
// transfer is completed (in the case of passive mode transfers).
// Therefore, calling store first would hang waiting for a preliminary
// reply.
if (ftp1.remoteRetrieve(file1) && ftp2.remoteStoreUnique(file2))
{
// if(ftp1.remoteRetrieve(file1) && ftp2.remoteStore(file2)) {
// We have to fetch the positive completion reply.
ftp1.completePendingCommand();
ftp2.completePendingCommand();
}
else
{
System.err.println(
"Couldn't initiate transfer. Check that filenames are valid.");
break __main;
}
}
catch (IOException e)
{
e.printStackTrace();
System.exit(1);
}
finally
{
try
{
if (ftp1.isConnected())
{
ftp1.logout();
ftp1.disconnect();
}
}
catch (IOException e)
{
// do nothing
}
try
{
if (ftp2.isConnected())
{
ftp2.logout();
ftp2.disconnect();
}
}
catch (IOException e)
{
// do nothing
}
}
