Dart

Check PayPal Access Token Expiration

See more PayPal Examples

Checks to see if the PayPal access token expired. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // Note: Requires Chilkat v9.5.0.64 or greater.

  // This requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  // In the example linked here: PayPal OAuth2 Token,
  // we fetched a PayPal access token and saved it to a JSON file.
  // We also recorded the current date/time.
  // Load this JSON file and compare the current date/time with the fetch date/time
  // and the "expires_in" value to see if the token is expired.

  final json = CkJsonObject();
  try {
    json.loadFile('qa_data/tokens/paypal.json');
  } on ChilkatException {
    print('Failed to load access key json file.');
    return;
  }

  // Get the current date/time.
  final dateTime = CkDateTime();
  final bLocalTime = false;
  final dtNow = dateTime.getAsUnixTime(bLocalTime);

  // Get the access token create date/time
  final dtCreate = json.intOf('tokenCreateTimeUtc');

  // Find out how many seconds have elapsed.
  final numSeconds = dtNow - dtCreate;

  // Get the expires_in value from the JSON.
  final expiresIn = json.intOf('expires_in');

  print('token age (in seconds) = $numSeconds');
  print('expires_in = $expiresIn');

  // If the token expired, or if it will expire in 5 minutes or less,
  // get another token.
  if (numSeconds < (expiresIn - 300)) {
    print('The token is not yet expired.  No need to fetch another.');
    return;
  }

  print('Time to fetch a new access token...');

  // Get another token..
  // See the example at Get PayPal OAuth2 Token
  // to get another token..
}