Dart

Execute an FTP Upload Plan

Demonstrates the Chilkat Ftp2.PutPlan method, which executes a previously created upload plan. The first argument is the plan text and the second is the local path of a completion log that records each successful operation.

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.

Background: The completion log is what makes plan execution resumable: each successful upload is recorded, so if a run is interrupted, re-executing the same plan skips the operations already logged and continues where it left off — invaluable for a large transfer over a flaky connection. The plan's stored absolute remote paths are used regardless of the current remote directory, so execution is independent of session state.

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Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Demonstrates the Ftp2.PutPlan method, which executes a previously created upload plan.  The 1st
  // argument is the plan text and the 2nd is the local path of a completion log.

  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;
  }

  // Load a plan that was previously created with CreatePlan.
  final sbPlan = CkStringBuilder();
  try {
    sbPlan.loadFile('qa_output/upload_plan.txt', 'utf-8');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final plan = sbPlan.getAsString();

  // Execute the plan.  Each successful operation is recorded in the completion log, which lets an
  // interrupted run be resumed without repeating completed uploads.  The plan uses its stored
  // absolute remote paths even if the current remote directory has changed.
  try {
    ftp.putPlan(plan, 'qa_output/upload_done.log');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Upload plan executed.');

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