Java

Sync a Local Tree Up with Preview and Traversal Control

Demonstrates the Chilkat Ftp2.SyncRemoteTree2 method, which uploads a local tree to the current remote directory with extra controls. The arguments are the local root, the upload mode, whether to descend into subdirectories, and whether to run preview-only. In preview mode the results are available via the SyncPreview property.

Note: The local paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: The preview flag is what makes this valuable: run it first to see exactly which files would be uploaded — without transferring anything — then run it again for real once the plan looks right. That dry-run step is a strong safeguard before a large or destructive-looking sync. The descend flag lets you limit the operation to the top level, and the mode is the same set of upload rules as SyncRemoteTree.

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Java

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[])
  {
    boolean success = false;

    //  Demonstrates the Ftp2.SyncRemoteTree2 method, which uploads a local tree to the current remote
    //  directory with extra traversal and preview controls.  The 1st argument is the local root, the
    //  2nd is the upload mode, the 3rd selects whether to descend into subdirectories, and the 4th
    //  selects preview-only (no actual transfers).

    CkFtp2 ftp = new CkFtp2();

    ftp.put_Hostname("ftp.example.com");
    ftp.put_Username("myFtpLogin");

    //  Normally you would not hard-code the password in source.  You should instead obtain it
    //  from an interactive prompt, environment variable, or a secrets vault.
    ftp.put_Password("myPassword");

    success = ftp.Connect();
    if (success == false) {
        System.out.println(ftp.lastErrorText());
        return;
        }

    success = ftp.ChangeRemoteDir("public_html");
    if (success == false) {
        System.out.println(ftp.lastErrorText());
        return;
        }

    //    0 = all selected files
    //    1 = files missing on the server
    //    2 = missing, or newer locally
    //    3 = only files that exist remotely and are newer locally
    //    4 = missing, or a different size
    //    5 = missing, different size, or newer locally

    int mode = 5;

    //  Descend into subdirectories.
    boolean bDescend = true;

    //  Preview only: determine what WOULD be uploaded without transferring anything.  The results are
    //  available via the SyncPreview property.
    boolean bPreviewOnly = true;

    success = ftp.SyncRemoteTree2("qa_data/site",mode,bDescend,bPreviewOnly);
    if (success == false) {
        System.out.println(ftp.lastErrorText());
        return;
        }

    //  SyncPreview lists the files that would be uploaded.
    System.out.println(ftp.syncPreview());

    success = ftp.Disconnect();
    if (success == false) {
        System.out.println(ftp.lastErrorText());
        return;
        }
  }
}