Dart

Set an FTP Compatibility Option

Demonstrates the Chilkat Ftp2.SetOption method, which enables or disables a named compatibility option. The only argument is the option name; matching is case-insensitive, and prefixing a recognized name with No- disables it.

Background: Real-world FTP servers have quirks, and these named options are targeted workarounds for specific ones — for example Microsoft-TLS-1.2-Workaround addresses a known interoperability issue. Most applications never need any of them; reach for SetOption only when a documented server problem calls for a specific fix, and use the exact recognized name.

Chilkat Dart Downloads

Download Chilkat for Dart

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the Ftp2.SetOption method, which enables or disables a named compatibility option.
  // The only argument is the option name.  Prefix a name with "No-" to disable it.

  final ftp = CkFtp2();

  ftp.hostname = 'ftp.example.com';
  ftp.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.password = 'myPassword';

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

  // Enable a recognized compatibility workaround.  Option-name matching is case-insensitive.
  try {
    ftp.setOption('Microsoft-TLS-1.2-Workaround');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // To disable it, prefix the name with "No-":
  try {
    ftp.setOption('No-Microsoft-TLS-1.2-Workaround');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Compatibility option toggled.');

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