(Android™) Co:Z SFTP Binary File Download (from z/OS IBM Mainframe)

Demonstrates how to download a binary file, such as a .zip, from a Co:Z SFTP server on a z/OS IBM Mainframe.

Note: This requires Chilkat v9.5.0.76 or greater.

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkSFtp sftp = new CkSFtp();

    // Connect to the SSH server.  
    String hostname = "sftp.example.com";
    int port = 22;
    boolean success = sftp.Connect(hostname,port);
    if (success != true) {
        Log.i(TAG, sftp.lastErrorText());
        return;
        }

    success = sftp.AuthenticatePw("myLogin","myPassword");
    if (success != true) {
        Log.i(TAG, sftp.lastErrorText());
        return;
        }

    success = sftp.InitializeSftp();
    if (success != true) {
        Log.i(TAG, sftp.lastErrorText());
        return;
        }

    // To download a binary file from the Co:Z SFTP server, 
    // we must switch to binary mode in the following unconventional way.
    // We pretend to fetch a directory listing for "/+mode=binary"
    // This has the effect of putting the server in binary mode for transfers.
    String handle = sftp.openDir("/+mode=binary");
    if (sftp.get_LastMethodSuccess() != true) {
        Log.i(TAG, sftp.lastErrorText());
        return;
        }

    // Download the "directory listing" (but it's not actually a directory listing, and we'll just discard it.)
    CkSFtpDir dirListing = sftp.ReadDir(handle);
    if (sftp.get_LastMethodSuccess() != true) {
        Log.i(TAG, sftp.lastErrorText());
        return;
        }

    // Close the directory handle:
    success = sftp.CloseHandle(handle);
    if (success != true) {
        Log.i(TAG, sftp.lastErrorText());
        return;
        }

    // Download the binary file:
    String localFilePath = "c:/temp/test.zip";
    String remoteFilePath = "test.zip";
    success = sftp.DownloadFileByName(remoteFilePath,localFilePath);
    if (success != true) {
        Log.i(TAG, sftp.lastErrorText());
        return;
        }

    Log.i(TAG, "Success.");

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}