Dart

ChartURL - Create a Signed URL

See more HTTP Misc Examples

Demonstrates how to create a signed URL for ChartURL. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // This example assumes the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  final crypt = CkCrypt2();

  // Example key: "dek-d7a46236eda961a6c3c18ffcc6b077ba87d27e9ae85f7842c6d427c265dd5f69d5131308d93332353d4a55a4b1160fcf516515a4a9f0aa50fbf2d7a2e7d0f1c5"
  final key = 'charturl-sign-encrypt-key';
  // Example token: "dt-RwYN"
  final token = 'charturl-token';

  final slug = 'weekly-activity';
  final data = '{ "options": {"data": {"columns": [["This Week",10,13],["Last Week",9,5]]}}}';

  crypt.hashAlgorithm = 'SHA256';
  crypt.macAlgorithm = 'HMAC';
  crypt.setMacKeyString(key);
  crypt.encodingMode = 'base64';

  final json = CkJsonObject();
  json.load(data);
  print('json = ${json.emit()}');

  final sig = crypt.macStringENC(json.emit());

  final sbUrl = CkStringBuilder();
  sbUrl.append('https://charturl.com/i/');
  sbUrl.append(token);
  sbUrl.append('/');
  sbUrl.append(slug);
  sbUrl.append('?d=');
  sbUrl.append(crypt.encodeString(json.emit(), 'utf-8', 'url'));
  sbUrl.append('&s=');
  sbUrl.append(crypt.encodeString(sig, 'utf-8', 'url'));

  print('Signed URL: ${sbUrl.getAsString()}');
}