Dart

Okta Client Credentials FLow

See more Okta OAuth/OIDC Examples

The Client Credentials flow is recommended for use in machine-to-machine authentication. Your application will need to securely store its Client ID and Secret and pass those to Okta in exchange for an access token. At a high-level, the flow only has two steps:

• Your application passes its client credentials to your Okta authorization server.
• If the credentials are accurate, Okta responds with an access token.

Note: This example uses "customScope". You'll replace it with whatever scope(s) you've defined for your app. Scopes are defined in your Authorization Server. See Okta Authorization Server / Scopes

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 --request POST \
  //   --url https://{yourOktaDomain}/oauth2/default/v1/token \
  //   --header 'accept: application/json' \
  //   --user "client_id:client_secret" \
  //   --header 'cache-control: no-cache' \
  //   --header 'content-type: application/x-www-form-urlencoded' \
  //   --data 'grant_type=client_credentials&scope=customScope'

  http.login = 'client_id';
  http.password = 'client_secret';

  final req = CkHttpRequest();
  req.httpVerb = 'POST';
  req.path = '/oauth2/default/v1/token';
  req.contentType = 'application/x-www-form-urlencoded';
  req.addParam('grant_type', 'client_credentials');
  req.addParam('scope', 'customScope');

  req.addHeader('accept', 'application/json');

  final resp = CkHttpResponse();
  try {
    http.httpReq('https://{yourOktaDomain}/oauth2/default/v1/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)

  // {
  //   "access_token": "eyJraWQiO ... B2CnCLj7GRUW3mQ",
  //   "token_type": "Bearer",
  //   "expires_in": 3600,
  //   "scope": "customScope"
  // }

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