Dart

Azure AD Service-to-service access token request

See more Azure OAuth2 Examples

Send an Azure AD service-to-service token request to get an access token using a shared 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 http = CkHttp();

  // To see the exact HTTP request sent and the response, set the SessionLogFilename property:
  http.sessionLogFilename = 'qa_output/chilkatHttpLog.txt';

  final req = CkHttpRequest();

  // Set the following request params:
  // grant_type 	required 	Specifies the requested grant type. In a Client Credentials Grant flow, the value must be client_credentials.
  // 
  // client_id 	required 	Specifies the Azure AD client id of the calling web service. 
  //     To find the calling application's client ID, in the Azure portal, click Azure Active Directory, click App registrations, click the application. 
  //     The client_id is the Application ID
  // 
  // client_secret 	required 	Enter a key registered for the calling web service or daemon application in Azure AD. 
  //     To create a key, in the Azure portal, click Azure Active Directory, click App registrations, click the application, click Settings, click Keys, and add a Key.
  //     URL-encode this secret when providing it.
  // 
  // resource 	required 	Enter the App ID URI of the receiving web service. To find the App ID URI, in the Azure portal, click Azure Active Directory, 
  //     click App registrations, click the service application, and then click Settings and Properties.

  req.addParam('grant_type', 'client_credentials');
  req.addParam('client_id', 'MY_CLIENT_ID');
  req.addParam('client_secret', 'MY_CLIENT_SECRET');
  req.addParam('resource', 'https://service.contoso.com/');

  req.httpVerb = 'POST';
  req.contentType = 'application/x-www-form-urlencoded';

  final resp = CkHttpResponse();
  try {
    http.httpReq('https://login.microsoftonline.com/<tenant_id>/oauth2/token', req, resp);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  final respStatusCode = resp.statusCode;
  print('Response Status Code = $respStatusCode');

  final json = CkJsonObject();
  json.emitCompact = false;
  json.load(resp.bodyStr);
  print('Response JSON:');
  print(json.emit());

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

  // Sample response:

  // {
  //   "token_type": "Bearer",
  //   "expires_in": "3599",
  //   "ext_expires_in": "3599",
  //   "expires_on": "1570059833",
  //   "not_before": "1570055933",
  //   "resource": "https://adminchilkatsoft.onmicrosoft.com/eb1b8ced-76b7-4845-aec5-d3e91776e345",
  //   "access_token": "eyJ0eXAiO ... pmgw"
  // }

  // To get the items from the JSON....
  final tokenType = json.stringOf('token_type');
  final expiresIn = json.stringOf('expires_in');
  final extExpiresIn = json.stringOf('ext_expires_in');
  final expiresOn = json.stringOf('expires_on');
  final notBefore = json.stringOf('not_before');
  final resource = json.stringOf('resource');
  final accessToken = json.stringOf('access_token');
}