Dart Requires Chilkat v10.1.2+

SharePoint Rest API using OAuth

See more OAuth2 Examples

Demonstrates how to get an OAuth2 access token for the SharePoint REST API. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  // To further clarify, see OAuth 2.0 Authorization Flow

  final oauth2 = CkOAuth2();

  // The ListenPort should match the port in your localhost Reply URL of your Azure AD app.
  // Your Reply URL must be exactly "http://localhost:LISTEN_PORT/"
  //    * Do not use "https"
  //    * Make sure the ending "/" is included.
  //    * You may choose any port number that doesn't collide with anything else.
  oauth2.listenPort = 3017;

  oauth2.authorizationEndpoint = 'https://login.microsoftonline.com/TENANT_ID/oauth2/authorize';
  oauth2.tokenEndpoint = 'https://login.windows.net/TENANT_ID/oauth2/token?api-version=1.0';

  // Replace these with actual values.
  // Use the application ID
  oauth2.clientId = 'CLIENT_ID';
  // Use the password
  oauth2.clientSecret = 'CLIENT_SECRET';

  oauth2.codeChallenge = false;

  oauth2.scope = 'openid';
  oauth2.resource = 'https://graph.microsoft.com/';

  oauth2.includeNonce = true;
  oauth2.responseMode = 'form_post';
  oauth2.responseType = 'id_token+code';

  // Begin the OAuth2 Authorization code flow.  This returns a URL that should be loaded in a browser.
  final String url;
  try {
    url = oauth2.startAuth();
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('url = $url');

  // Launch the default browser on the system and navigate to the url.
  // The LaunchBrowser method was added in Chilkat v10.1.2.
  try {
    oauth2.launchBrowser(url);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Wait for the user to approve or deny authorization in the browser.
  var numMsWaited = 0;
  while ((numMsWaited < 90000) && (oauth2.authFlowState < 3)) {
    oauth2.sleepMs(100);
    numMsWaited += 100;
  }

  // If the browser does not respond within the specified time, AuthFlowState will be:
  // 
  // 1: Waiting for Redirect – The OAuth2 background thread is waiting for the browser's redirect request.
  // 2: Waiting for Final Response – The thread is awaiting the final access token response.
  // In either case, cancel the background task initiated by StartAuth.

  if (oauth2.authFlowState < 3) {
    oauth2.cancel();
    print('No response from the browser!');
    return;
  }

  // Check AuthFlowState to determine if authorization was granted, denied, or failed:
  // 
  // 3: Success – OAuth2 flow completed, the background thread exited, and the successful response is in AccessTokenResponse.
  // 4: Access Denied – OAuth2 flow completed, the background thread exited, and the error response is in AccessTokenResponse.
  // 5: Failure – OAuth2 flow failed before completion, the background thread exited, and error details are in FailureInfo.

  if (oauth2.authFlowState == 5) {
    print('OAuth2 failed to complete.');
    print(oauth2.failureInfo);
    return;
  }

  if (oauth2.authFlowState == 4) {
    print('OAuth2 authorization was denied.');
    print(oauth2.accessTokenResponse);
    return;
  }

  if (oauth2.authFlowState != 3) {
    print('Unexpected AuthFlowState:${oauth2.authFlowState}');
    return;
  }

  print('OAuth2 authorization granted!');
  print('Access Token = ${oauth2.accessToken}');
}