React Native

POP3 GMail XOAUTH2 Authentication

See more GMail SMTP/IMAP/POP Examples

Demonstrates using OAuth2 authentication with pop.gmail.com.

Note: This example requires Chilkat v9.5.0.83 or greater.

React Native

import { JsonObject, MailMan } 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 mailman = new MailMan();

  mailman.mailHost = 'pop.gmail.com';
  mailman.mailPort = 995;
  mailman.popSsl = true;

  mailman.popUsername = 'my_account@gmail.com';

  // If using OAuth2 authentication, leave the password empty.
  mailman.popPassword = '';

  // Load our previously obtained OAuth2 access token.
  // See Getting a GMail POP3 OAuth2 Access Token
  const jsonToken = new JsonObject();
  try {
    jsonToken.loadFile('qa_data/tokens/gmail_pop3.json');
  } catch {
    console.log(jsonToken.lastErrorText);
    return;
  }

  mailman.oAuth2AccessToken = jsonToken.stringOf('access_token');

  // Make the TLS connection to the POP3 server.
  try {
    await mailman.pop3ConnectAsync();
  } catch {
    console.log(mailman.lastErrorText);
    return;
  }

  // Authenticate..
  try {
    await mailman.pop3AuthenticateAsync();
  } catch {
    console.log(mailman.lastErrorText);
    return;
  }

  // Find out how many emails are on the server..
  const numEmails = await mailman.checkMailAsync();
  if (numEmails < 0) {
    console.log(mailman.lastErrorText);
    return;
  }

  // Examine the POP3 session log:
  console.log(mailman.pop3SessionLog);

  // The POP3 session log will look something like this:

  // **** Connected to pop.gmail.com:995
  // < +OK Gpop ready for requests from 87.9.200.42 l16mb86351205iok
  // > AUTH XOAUTH2 dXNlcj1....VaMDJFAQE=
  // < +OK Welcome.
  // > STAT
  // < +OK 301 1627357
  // 
  // -- Finished.

  // End the POP3 session and close the connection to the GMail server.
  try {
    await mailman.pop3EndSessionAsync();
  } catch {
    console.log(mailman.lastErrorText);
    return;
  }

  console.log('-- Finished.');
}