Dart

Append Bytes to a Remote FTP File (BinData)

Demonstrates the Chilkat Ftp2.AppendFileBd method, which appends the bytes in a BinData to a remote file. The first argument is the remote filename and the second is the BinData. No conversion is performed.

Background: The binary append: add in-memory bytes to the end of a remote file without an intermediate local file and without any encoding or line-ending translation. It is the right choice for growing a binary file — concatenating captured data, for instance — where exact bytes matter.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the Ftp2.AppendFileBd method, which appends the bytes in a BinData to a remote
  // file.  The 1st argument is the remote filename and the 2nd is the BinData.

  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;
  }

  final bd = CkBinData();
  try {
    bd.loadFile('qa_data/more_data.bin');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  try {
    ftp.appendFileBd('data/collected.bin', bd);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Appended ${bd.numBytes} bytes.');

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