async-twitter-login

Simple Twitter login, without much of the bullshit. and promises... who doesn't like them?

✨ Features

Twitter OAuth lightweight wrap.
Promises. 🎈
Readable Objects.

All this in < 4kb, what else do you need? ✨

📦 Installation

npm install async-twitter-login

🚀 Quick start

We will configure two routes in our web server, auth/login and auth/callback can have any name :P

Initialization

We import and instantiate, you will need your consumer key and your comsumer secret... both are obtained when creating an application from the Twitter Developer Portal.

Finally you will need your callback url, as we said before it would be https://example.com/auth/callback.

// ECMAScript
import AsyncTwitterLogin from 'async-twitter-login'

// CommonJS
const AsyncTwitterLogin = require('async-twitter-login').default

const twitterLogin = new AsyncTwitterLogin({
  consumerKey: 'your-consumer-key',
  consumerSecret: 'your-consumer-secret',
  callbackUrl: 'https://example.com/auth/callback'
})

Login

From our auth/login path we call the request() method and save in a safe place tokenSecret to use it later.

app.get('/auth/login', async (req, res) => {
  try {
    const { token, tokenSecret, redirectUrl } = await twitterLogin.request()
    
    // Save the token secret in a safe place
    req.session.tokenSecret = tokenSecret

    // Redirect to Twitter to authorize the application
    res.redirect(redirectUrl)
  } catch (err) {
    // Handle errors
  }
})

Callback

If the user completes the authorization from twitter, he will be redirected to his auth/callback path together with oauth_token and oauth_verifier as query parameters in the URL, they are accessed with req.query.

We call the callback() method from our auth/callback path and pass the parameters to it along with the tokenSecret that we saved in the previous step.

This method will return a user object. 🧔

app.get('/auth/callback', async (req, res) => {
  try {
    const { oauth_token: token, oauth_verifier: verifier } = req.query
    const tokenSecret = req.session.tokenSecret
    const user = await twitterLogin.callback(token, tokenSecret, verifier)

    // Delete the token secret from the session
    delete req.session.tokenSecret

    // The user object is a readable object with the user's data.
    // user = {
    //   id,
    //   userName,
    //   token,
    //   tokenSecret
    // }
    req.session.user = user

    // Redirect to the home page
    res.redirect('/')
  } catch (err) {
    // Handle errors
  }
})

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