Dart

Azure REST API Access Token

See more Azure OAuth2 Examples

Demonstrates how to request an Azure REST API OAUTH2 access token.

Note: In order to access resources a Service Principal needs to be created in your Tenant. It is really convenient to do it via AZ CLI:

az ad sp create-for-rbac --name [APP_NAME] --password [CLIENT_SECRET]

Dart

import 'package:chilkat/chilkat.dart';

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

  final rest = CkRest();

  // URL: https://login.microsoftonline.com/TENANT_ID/oauth2/token
  final bTls = true;
  final port = 443;
  final bAutoReconnect = true;
  try {
    rest.connect('login.microsoftonline.com', port, bTls, bAutoReconnect);
  } on ChilkatException catch (e) {
    print('ConnectFailReason: ${rest.connectFailReason}');
    print(e.lastErrorText);
    return;
  }

  // Add query params to the request.
  rest.addQueryParam('grant_type', 'client_credentials');
  rest.addQueryParam('client_id', 'APP_ID');
  rest.addQueryParam('client_secret', 'CLIENT_SECRET');
  // Note: The resource must match the API for which you're using the access token..
  rest.addQueryParam('resource', 'https://management.azure.com/');

  final String strResponseBody;
  try {
    strResponseBody = rest.fullRequestFormUrlEncoded('POST', '/TENANT_ID/oauth2/token');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final respStatusCode = rest.responseStatusCode;
  if (respStatusCode >= 400) {
    print('Response Status Code = $respStatusCode');
    print('Response Header:');
    print(rest.responseHeader);
    print('Response Body:');
    print(strResponseBody);
    return;
  }

  final json = CkJsonObject();
  json.load(strResponseBody);
  json.emitCompact = false;
  print(json.emit());

  // The result is an access token such as the following:

  // {
  //   "token_type": "Bearer",
  //   "expires_in": "3600",
  //   "ext_expires_in": "3600",
  //   "expires_on": "1557864616",
  //   "not_before": "1557860716",
  //   "resource": "https://management.azure.com/",
  //   "access_token": "eyJ0eXAiOiJKV1QiL ... 20UFDDOHEyUg"
  // }

  // We'll save this JSON to a file for other examples to use..
  json.writeFile('qa_data/tokens/azureToken.json');
}