React Native

Get XOAUTH2 Access Token from Google OAuth 2.0 Authorization Server

See more HTTP Examples

Obtains an OAUTH2 access token from the Google OAuth 2.0 Authorization Server. This is for Server to server applications using Google API's that need an access token. See https://developers.google.com/accounts/docs/OAuth2ServiceAccount React Native

import { Cert, Http } from '@chilkat/react-native'

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

  const http = new Http();

  // --------------------------------------------------------------------------------
  // For a step-by-step guide for setting up your Google Workspace service account,
  // see Setup Google Workspace Account for Sending SMTP GMail from a Service Account
  // --------------------------------------------------------------------------------
  // Begin by loading your Google service account key (.p12)
  const cert = new Cert();
  try {
    cert.loadPfxFile('c:/someDirectory/keys/chilkat25-cbd7b42afbd8.p12', 'notasecret');
  } catch {
    console.log(cert.lastErrorText);
    return;
  }

  // The ISS is your service account email address ending in gserviceaccount.com.
  const iss = 'chilkatsvc@chilkat25.iam.gserviceaccount.com';

  // The scope is always the following string:
  const scope = 'https://mail.google.com/';

  // The sub is your company email address
  const oauthSub = 'bob@yourcompany.com';

  // The access token is valid for this number of seconds.
  const numSec = 3600;

  try {
    const accessToken = await http.gSvcOauthAccessTokenAsync(iss, scope, oauthSub, numSec, cert);
    console.log(`access token: ${accessToken}`);
  } catch {
    console.log(http.lastErrorText);
    return;
  }

  // The access token allows us to send unlimited emails while it's valid. Once it expires, we must obtain and use a new one.
}