(Java) SCP Download from a Specific Directory

Demonstrates how to download a file using the SCP protocol (Secure Copy Protocol over SSH), from a specific remote directory located on the SSH server. The remote directory can be a path relative to the HOME directory of the SSH user account, or an absolute path on the remote filesystem. Obviously, in both cases the SSH user account must have permission to open and read the file in the specified directory.

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import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

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

    CkSsh ssh = new CkSsh();

    // Hostname may be an IP address or hostname:
    String hostname = "www.some-ssh-server.com";
    int port = 22;

    // Connect to an SSH server:
    boolean success = ssh.Connect(hostname,port);
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Wait a max of 5 seconds when reading responses..
    ssh.put_IdleTimeoutMs(5000);

    // Authenticate using login/password:
    success = ssh.AuthenticatePw("myLogin","myPassword");
    if (success != true) {
        System.out.println(ssh.lastErrorText());
        return;
        }

    // Once the SSH object is connected and authenticated, we use it
    // in our SCP object.
    CkScp scp = new CkScp();

    success = scp.UseSsh(ssh);
    if (success != true) {
        System.out.println(scp.lastErrorText());
        return;
        }

    // This downloads a file from the "testApp/logs/" subdirectory (relative to the SSH user account's HOME directory).  
    // For example, if the HOME directory is /Users/chilkat, then the following downloads
    // /Users/chilkat/testApp/logs/test1.log
    String remotePath = "testApp/logs/test1.log";
    String localPath = "c:/testApp/logs/test1.log";
    success = scp.DownloadFile(remotePath,localPath);
    if (success != true) {
        System.out.println(scp.lastErrorText());
        return;
        }

    // The following call to DownloadFile specifies an absolute file path on the SSH server:
    remotePath = "/Users/chilkat/Documents/gecko.jpg";
    localPath = "c:/temp/images/gecko.jpg";
    success = scp.DownloadFile(remotePath,localPath);
    if (success != true) {
        System.out.println(scp.lastErrorText());
        return;
        }

    System.out.println("SCP download file success.");

    // Disconnect
    ssh.Disconnect();
  }
}