[blog] /2017-third-party-oauth-authentication-on-expressjs

express-facebook-example.js

const express = require('express');
const passport = require('passport');
const FacebookStrategy = require('passport-facebook');

/*
 * Server
 */
const app = express();


/*
 * Setup for JWT authentication
 */
passport.use(new FacebookStrategy({
  clientID: '448621075525254',
  clientSecret: '9d82d0042fca547d41b07e5970aba706',
  callbackURL: '/login/facebook/callback',
  profileFields: ['id', 'email', 'name'],
}, (accessToken, refreshToken, profile, done) => {
  const { id, email } = profile._json;
  user = {
    provider: 'facebook',
    providerID: id,
    email: email,
  }
  return done(null, user);
}));
app.use(passport.initialize());


/*
 * Routes
 */
app.get('/login/facebook',
  passport.authenticate('facebook', {
    scope: ['public_profile', 'email'],
  })
);

app.get('/login/facebook/callback',
  passport.authenticate('facebook', {
    session: false,
    failureRedirect: '/login/facebook',
  }), (req, res) => {
    return res.json(req.user);
  }
);


const port = 3000;
app.listen(port, () => {
  console.log(('App is running at http://localhost:%d'), port);
});