Java

Restart/Resume FTP Download

See more FTP Examples

Resume downloading a file from an FTP server. Chilkat2 Java

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

public class ChilkatExample {

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

        Ftp2 ftp = new Ftp2();

        ftp.setHostname("ftp.example.com");
        ftp.setUsername("login");
        ftp.setPassword("password");

        // Connect and login to the FTP server.
        try {
            ftp.connect();

            // Change to the remote directory where the file is located.
            // This step is only necessary if the file is not in the root directory
            // for the FTP account.
            ftp.changeRemoteDir("temp");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // To resume a download, it is assumed that the partial file
        // is already present on the local filesystem.
        // You only need to set the RestartNext property to resume
        // the download.  The Chilkat FTP component sets the resume
        // point by getting the existing size of the target (local) file.
        ftp.setRestartNext(true);

        String localFilename = "big.zip";
        String remoteFilename = "big.zip";

        // Resume downloading...
        try {
            ftp.getFile(remoteFilename, localFilename);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        ftp.disconnect();

        System.out.println("File Downloaded!");
    }
}