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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import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Ftp2;

public class ChilkatExample {

    public static void main(String[] args) {
        // 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).

        Ftp2 ftp = new Ftp2();

        ftp.setHostname("ftp.example.com");
        ftp.setUsername("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.setPassword("myPassword");

        try {
            ftp.connect();

            ftp.changeRemoteDir("public_html");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            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;

        try {
            ftp.syncRemoteTree2("qa_data/site", mode, bDescend, bPreviewOnly);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

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

        try {
            ftp.disconnect();
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }
    }
}