Java

Multiple Hop SSH to SFTP

See more SFTP Examples

Demonstrates how to SFTP through an intermediate SSH server (multiple hop). The scheme looks like this:

Application => ServerSSH1 => ServerSFtp

The ConnectThroughSsh method is added in Chilkat version 9.5.0.55 to accomplish this task.

Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.SFtp;
import com.chilkatsoft.chilkat2.Ssh;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example assumes the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Ssh ssh1 = new Ssh();

        // Hostname may be an IP address or domain name:
        String hostname = "192.168.1.111";
        String port = 22;

        // Connect directly to the 1st SSH server:
        try {
            ssh1.connect(hostname, port);

            // Authenticate using login/password:
            ssh1.authenticatePw("myLogin", "myPassword");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Connect through the 1st SSH connection to reach a 2nd SSH server (for SFTP)
        // Note: Any number of connections may be simultaneously tunneled through a single
        // existing SSH connection.
        SFtp sftp = new SFtp();

        // Connect to some SSH/SFTP server through ssh1.
        try {
            sftp.connectThroughSsh(ssh1, "sftp.someremoteserver.com", 22);

            // Authenticate with the SFTP server.
            sftp.authenticatePw("myLogin", "myPassword");

            // After authenticating, the SFTP subsystem must be initialized:
            sftp.initializeSftp();
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Upload from the local file to the SSH server.
        // Important -- the remote filepath is the 1st argument,
        // the local filepath is the 2nd argument;
        String remoteFilePath = "hamlet.xml";
        String localFilePath = "c:/temp/hamlet.xml";

        try {
            sftp.uploadFileByName(remoteFilePath, localFilePath);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Success.");

        // Close the connection with the SFTP server.(This closes the the tunnel through ssh1.)
        // The connection with ssh1 is still alive, and may be used for more connections.
        sftp.disconnect();

        // ...
        // ...
        // ...

        ssh1.disconnect();
    }
}