(Node.js) POP3 GMail XOAUTH2 Authentication

Demonstrates using OAuth2 authentication with pop.gmail.com.

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

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var mailman = new chilkat.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
    var jsonToken = new chilkat.JsonObject();
    var success = jsonToken.LoadFile("qa_data/tokens/gmail_pop3.json");
    if (success == false) {
        console.log(jsonToken.LastErrorText);
        return;
    }

    mailman.OAuth2AccessToken = jsonToken.StringOf("access_token");

    // Make the TLS connection to the POP3 server.
    success = mailman.Pop3Connect();
    if (success !== true) {
        console.log(mailman.LastErrorText);
        return;
    }

    // Authenticate..
    success = mailman.Pop3Authenticate();
    if (success !== true) {
        console.log(mailman.LastErrorText);
        return;
    }

    // Find out how many emails are on the server..
    var numEmails = mailman.CheckMail();
    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.
    success = mailman.Pop3EndSession();
    if (success !== true) {
        console.log(mailman.LastErrorText);
        return;
    }

    console.log("-- Finished.");

}

chilkatExample();