Dart

Isabel Connect Create Access Token given Valid Refresh Token

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Create (refresh) an access token given a valid refresh token. 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 http = CkHttp();

  // Implements the following CURL command:

  // curl -X POST https://api.ibanity.com/isabel-connect/oauth2/token \
  // --cert certificate.pem:qwertyuiop1 \
  // --key private_key.pem  \
  // -H "Content-Type: application/x-www-form-urlencoded" \
  // -H "Accept: application/vnd.api+json" \
  // -H "Ibanity-Idempotency-Key: 94c5586e-e15e-4bae-a1fe-fdbefe1f11d3"  \
  // -d grant_type=refresh_token \
  // -d refresh_token=valid_refresh_token \
  // -d client_id=valid_client_id \
  // -d client_secret=valid_client_secret

  // Ibanity provides the certificate + private key in PFX format.  This example will use the .pfx instead of the pair of PEM files.
  // (It is also possible to implement using Chilkat with the PEM files, but PFX is easier.)
  final cert = CkCert();
  try {
    cert.loadPfxFile('qa_data/pfx/my_ibanity_certificate.pfx', 'my_pfx_password');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  try {
    http.setSslClientCert(cert);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final req = CkHttpRequest();
  req.httpVerb = 'POST';
  req.path = '/isabel-connect/oauth2/token';
  req.contentType = 'application/x-www-form-urlencoded';
  req.addParam('grant_type', 'refresh_token');

  // Load the previously obtained refresh token.
  final jsonToken = CkJsonObject();
  try {
    jsonToken.loadFile('qa_data/tokens/isabel_refresh_token.json');
  } on ChilkatException {
    print('No existing access token.');
    return;
  }

  req.addParam('refresh_token', jsonToken.stringOf('refresh_token'));

  // Note: For sandbox testing, we literally want to use the strings
  // "valid_client_id", and "valid_client_secret".
  // For the live app, you would replace these with actual values.
  req.addParam('client_id', 'valid_client_id');
  req.addParam('client_secret', 'valid_client_secret');

  req.addHeader('Accept', 'application/vnd.api+json');

  final crypt = CkCrypt2();
  final idempotencyKey = crypt.generateUuid();
  print('Ibanity-Idempotency-Key: $idempotencyKey');
  req.addHeader('Ibanity-Idempotency-Key', idempotencyKey);

  final resp = CkHttpResponse();
  try {
    http.httpReq('https://api.ibanity.com/isabel-connect/oauth2/token', req, resp);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final sbResponseBody = CkStringBuilder();
  resp.getBodySb(sbResponseBody);
  final jResp = CkJsonObject();
  jResp.loadSb(sbResponseBody);
  jResp.emitCompact = false;

  print('Response Body:');
  print(jResp.emit());

  final respStatusCode = resp.statusCode;
  print('Response Status Code = $respStatusCode');
  if (respStatusCode >= 400) {
    print('Response Header:');
    print(resp.header);
    print('Failed.');
    return;
  }

  // Sample JSON response:
  // (Sample code for parsing the JSON response is shown below)

  // Notice that we don't get a new refresh token.  The original refresh token is used each time we
  // want to refresh.  However, we get a new access token.  This access token is to be used in Isabel API calls
  // until we need to refresh again.
  // {
  //   "token_type": "Bearer",
  //   "scope": "cloudconnect",
  //   "expires_in": 1799,
  //   "access_token": "access_token_1603365408"
  // }

  // Sample code for parsing the JSON response...
  // Use the following online tool to generate parsing code from sample JSON:
  // Generate Parsing Code from JSON

  final tokenType = jResp.stringOf('token_type');
  final scope = jResp.stringOf('scope');
  final expiresIn = jResp.intOf('expires_in');
  final accessToken = jResp.stringOf('access_token');

  // Save this to a file so we can load in other examples to include the access token in the HTTP request.
  jResp.writeFile('qa_data/tokens/isabel_access_token.json');
}