Get an FTP Listing Entry's Size as a String

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Demonstrates the Chilkat Ftp2.GetSizeStr method, which returns the size in bytes of a cached directory-listing entry as a decimal string. The only argument is a zero-based index.

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the Ftp2.GetSizeStr method, which returns the size in bytes of a cached
  // directory-listing entry as a decimal string.  The only argument is a zero-based index.

  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;
  }

  try {
    ftp.changeRemoteDir('public_html');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // GetDirCount retrieves the directory listing on the first call and returns the number of
  // entries.  A negative return indicates failure.
  final n = ftp.getDirCount();
  if (n < 0) {
    print(ftp.lastErrorText);
    return;
  }

  for (var i = 0; i < n; i++) {
    final name = ftp.getFilename(i);

    // The string form avoids integer-size limits in languages without a convenient 64-bit type.
    final fileSize = ftp.getSizeStr(i);
    print('$name  $fileSize bytes');
  }

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