Append a Local File to a Remote FTP File

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Demonstrates the Chilkat Ftp2.AppendFile method, which appends the contents of a local file to a remote file. The first argument is the local file path and the second is the remote file path. It uses the FTP APPE command.

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.

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the Ftp2.AppendFile method, which appends the contents of a local file to a remote
  // file.  The 1st argument is the local file path and the 2nd is the remote file path.

  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;
  }

  // Uses the FTP APPE command.  On a server with normal APPE behavior, a missing remote file is
  // created; otherwise the local bytes are appended to the end of the existing remote file.
  try {
    ftp.appendFile('qa_data/today.log', 'logs/app.log');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Appended to the remote file.');

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