React Native Requires Chilkat v11.0.0+

Calendar: Refresh Expired OAuth2 Access Token

See more Microsoft Calendar Examples

Refreshes an expired OAuth2 access token. React Native

import { FileAccess, Http, HttpRequest, HttpResponse, JsonObject } from '@chilkat/react-native'

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

  const json = new JsonObject();
  try {
    json.loadFile('qa_data/tokens/msGraphCalendar.json');
  } catch {
    return;
  }

  const req = new HttpRequest();
  req.addParam('grant_type', 'refresh_token');
  req.addParam('redirect_uri', 'http://localhost:3017/');
  req.addParam('client_id', 'MICROSOFT-GRAPH-CLIENT-ID');
  req.addParam('client_secret', 'MICROSOFT-GRAPH-CLIENT-SECRET');
  req.addParam('refresh_token', json.stringOf('refresh_token'));
  req.addParam('scope', 'openid profile offline_access user.readwrite calendars.readwrite files.readwrite');

  const http = new Http();

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

  const resp = new HttpResponse();
  try {
    await http.httpReqAsync('https://login.microsoftonline.com/common/oauth2/v2.0/token', req, resp);
  } catch {
    console.log(http.lastErrorText);
    return;
  }

  // Load the JSON response.
  json.load(resp.bodyStr);
  json.emitCompact = false;

  // Show the JSON response.
  console.log(json.emit());

  console.log(`Response status code: ${resp.statusCode}`);

  // If the response status code is not 200, then it's an error.
  if (resp.statusCode !== 200) {
    return;
  }

  // Save the refreshed access token JSON to a file for future requests.
  const fac = new FileAccess();
  fac.writeEntireTextFile('qa_data/tokens/msGraphCalendar.json', json.emit(), 'utf-8', false);

  console.log('Success.');
}