Dart

Example: Http.ResumeDownload method

Demonstrates the ResumeDownload method. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  var success = false;

  final http = CkHttp();
  http.keepResponseBody = true;

  // To demonstrate resuming a download, we've created a file on the chilkatsoft.com
  // web server that contains the first 82,379 bytes of the full  279,658 bytes of the hamlet.xml file.

  // We'll first download the partial file, and pretend it was a previous incomplete attempt to download the entire file.
  final localFilePath = 'c:/temp/qa_output/hamlet.xml';
  try {
    http.download('https://www.chilkatsoft.com/testData/hamlet_partial.xml', localFilePath);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Download the remainder of hamlet.xml.
  success = true;
  try {
    http.resumeDownload('https://www.chilkatsoft.com/testData/hamlet.xml', localFilePath);
  } on ChilkatException {
    success = false;
  }
  final statusCode = http.lastStatus;
  if (!success) {
    if (statusCode == 0) {
      // Unable to either send the request or get the response.
      print(http.lastErrorText);
    } else {
      // We got a response, but the status code was not in the 200s
      print('Response status code: $statusCode');
      // Examine the response body.
      print('Response body:');
      print(http.lastResponseBody);
    }

    print('Download failed.');
  } else {
    print('Download success, response status = $statusCode');
  }

  // The hamlet.xml file should be 279,658 bytes
  final fac = CkFileAccess();
  print('size of hamlet.xml: ${fac.fileSize(localFilePath)}');

  print('Success.');
}