Dart

FTP Download with Progress Event Callbacks

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FTP download with progress event callbacks. Dart

import 'package:chilkat/chilkat.dart';

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

  final ftp = CkFtp2();

  ftp.onPercentDone = (pctDone) {
    print('Percent Done: $pctDone');
    return false; // return true to abort the method in progress
  };
  ftp.onProgressInfo = (name, value) {
    print('$name: $value');
  };

  ftp.hostname = 'ftp.someFtpServer.com';
  ftp.username = 'myLogin';
  ftp.password = 'myPassword';

  // Connect and login to the FTP server.
  try {
    ftp.connectOnly();
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  try {
    ftp.loginAfterConnectOnly();
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Change to the remote directory where the file is located.
  // This step is only necessary if the file is not in the home directory
  // of the FTP account.
  try {
    ftp.changeRemoteDir('junk');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final localFilename = 'c:/temp/hamlet.xml';
  final remoteFilename = 'hamlet.xml';

  // Ensure that we get PercentDone callbacks.
  ftp.autoGetSizeForProgress = true;

  // Download the file.
  try {
    ftp.getFile(remoteFilename, localFilename);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  ftp.disconnect();

  print('File Downloaded!');
}