Node JS Facebook Login Example

Facebook login authentication in node js with passport. In this tutorial, you will learn how to implement a facebook login authentication system in node js using passport js.

As well as learn how to handle Session, passport, ejs in node express js. And this facebook login node.js passport tutorial will help you step by step to creating a facebook auth login system in node express js framework with passport js.

Before you get started facebook login node.js passport, you should have basic Knowledge of the followings:

  • Basic knowledge of HTML/CSS
  • A good understanding of JavaScript and Node.js
  • Latest Node.js version installed on your system

Prerequisite For Implement Facebook Login In Node Js App

If you want to integrate Facebook login in Node JS app. So for this, first you have to make an app in the Facebook Developer Console.

Because when you create an app in the Facebook Developer Console. Then Facebook provides you some secret details. With the help of which you can integrate and implement Facebook login in node js app.

If you do not know how to make apps on Facebook Developer Console. So you can make an app in the Facebook Developer Console by following the steps given below:

Step 1 – Visit the following url https://developers.facebook.com/apps/ and create a new facebook app.

Step 2 – Create facebook app with email and app name look like below picture:

create facebook app with laravel

Step 3 – Then, Navigate to setting->advanced and add redirect URL, looks like below picture:

get credential with facebook

Step 4 – Now, add valid auth redirect url. So, click facebook login->setting and add valid auth redirect URL, looks like below picture:

laravel facebook

Step 5 – Finally, Navigate to facebook developers dashboard and copy the following App ID and App SECRET, looks like below picture:

facebook app id and app secret

Now, save facebook secret id and secret key,Which is found from the Facebook Developer Console App.

Facebook Login Authentication with Passport In Node JS

Follow the following steps and create login system in node js using express js framework with MySQL db:

  • Step 1: Install Node Express JS Setup
  • Step 2: Include Packages and routes in app.js
  • Step 3: Create views
  • Step 4: Create Config.js
  • Step 5: Run Development Server

Step 1: Install Node Express JS Setup

In this step, execute the following command on terminal to create directory:

mkdir gAuth

After open gAuth directory with any text editor. And use the following command to enter your gAuth app directories, So open your cmd and run the following command:

cd gAuth

Now, execute the following command on terminal to install express, ejs, express-session and passport:

npm init npm install express ejs express-session passport passport-facebook-oauth --save 
express-flash

Flash is an extension of connect-flash with the ability to define a flash message and render it without redirecting the request.
In this node js mysql crud tutorial express flash is used to display a warning, error and information message

express-session

Express-session is used to made a session as like in PHP. In this node js mysql crud tutorial, session is needed as the express requirement of express-flash.

EJS

To render HTML pages for login and profile

passport

Social Authentication package for Node.js

passport-facebook-oauth

Facebook authentication module by Passport.js

Step 2: Include Packages and routes in app.js

In this step, you need to create a file app.js in the root folder of your app and add the following code:

const express = require('express');
const app = express();
const session = require('express-session');
const passport = require('passport');
const FacebookStrategy = require('passport-facebook').Strategy;
const routes = require('./routes.js');
const config = require('./config') app.set('view engine', 'ejs'); app.use(session({ resave: false, saveUninitialized: true, secret: 'SECRET'
})); app.use(passport.initialize());
app.use(passport.session()); passport.serializeUser(function (user, cb) { cb(null, user);
}); passport.deserializeUser(function (obj, cb) { cb(null, obj);
}); passport.use(new FacebookStrategy({ clientID: config.facebookAuth.clientID, clientSecret: config.facebookAuth.clientSecret, callbackURL: config.facebookAuth.callbackURL }, function (accessToken, refreshToken, profile, done) { return done(null, profile); }
)); app.use('/', routes); const port = 3000; app.listen(port, () => { console.log('App listening on port ' + port);
});

Now create a file named route.js in the root directory and paste the following code

const passport = require('passport');
const express = require('express');
var router = express.Router(); router.get('/', function (req, res) { res.render('pages/index.ejs'); // load the index.ejs file
}); router.get('/profile', isLoggedIn, function (req, res) { res.render('pages/profile.ejs', { user: req.user // get the user out of session and pass to template });
}); router.get('/error', isLoggedIn, function (req, res) { res.render('pages/error.ejs');
}); router.get('/auth/facebook', passport.authenticate('facebook', { scope: ['public_profile', 'email']
})); router.get('/auth/facebook/callback', passport.authenticate('facebook', { successRedirect: '/profile', failureRedirect: '/error' })); router.get('/logout', function (req, res) { req.logout(); res.redirect('/');
}); function isLoggedIn(req, res, next) { if (req.isAuthenticated()) return next(); res.redirect('/');
} module.exports = router;

Step 3: Create views

In this step, you need to create directory name pages. So, visit the views directory in your app and create the pages directory.

Inside the pages/ direcotry, you need to create two views file. The views file is the following:

  • index.ejs
  • profile.ejs

Application-folder/viwes/pages/index.js

Now, open your index.ejs file and update the following code into your file:

<!doctype html>
<html> <head> <title>Facebook Node Authentication</title> <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css"> <link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.97.5/css/materialize.min.css"> <style> .facebook { background-color: #3b5998 !important; color: #fff !important; } .fa-facebook-f:before, .fa-facebook:before { content: "\f09a"; } </style>
</head> <body> <nav class="light-blue lighten-1" role="navigation"> <div class="nav-wrapper container"> <a id="logo-container" href="#" class="brand-logo">Node Authentication</a> </div> </nav> <div class="section no-pad-bot" id="index-banner"> <div class="container"> <br><br> <div class="row center"> <div class="col s6 offset-s3"> <div class="card"> <div class="card-content"> <span class="card-title">Facebook Login using Node and passport</span> </div> <div class="card-action"> <a href="/auth/facebook" class="waves-effect waves-light btn social facebook"> <i class="fa fa-facebook"></i> Sign in with facebook </a> </div> </div> </div> </div> </div> </div>
</body> </html>

This index.ejs file contains login form.

Application-folder/viwes/pages/profile.js

Next, open your profile.ejs file and update the following code into your file:

<!doctype html>
<html> <head> <title>Facebook Node Authentication</title> <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet"> <link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.97.5/css/materialize.min.css"> <style> .card:hover { box-shadow: 0 10px 20px rgba(0, 0, 0, 0.19), 0 6px 6px rgba(0, 0, 0, 0.23); margin-bottom: 54px; } </style>
</head> <body> <nav class="light-blue lighten-1" role="navigation"> <div class="nav-wrapper container"> <a id="logo-container" href="#" class="brand-logo">Node Authentication</a> <a href="/logout" class="right">Logout</a> </div> </nav> <div class="section no-pad-bot" id="index-banner"> <div class="container"> <br><br> <div class="row center"> <div class="col s12"> <div class="card"> <div class="card-content blue lighten-3"> <span class="card-title white-text"><strong><i class="large material-icons">person</i> </strong></span> </div> <div class="card-action"> <h5><b><%= user.displayName %></b></h5> <p><strong>Facebook id</strong>: <%= user.id %></p> </div> </div> </div> </div> </div> </div>
</body> </html>

Step 4: Create Config.js

In this step, you need to config.js file in the root directory. Then add the following code into it:

module.exports = { 'facebookAuth': { 'clientID': '<APP_ID>', // your App ID 'clientSecret': '<APP_SECRET>', // your App Secret 'callbackURL': 'http://localhost:3000/auth/facebook/callback' }
}

Step 5: Run Development Server

You can use the following command to run development server:

//run the below command npm start after run this command open your browser and hit http://127.0.0.1:3000
OR
http://localhost:3000

Conclusion

In this node express js facebook auth login example tutorial. You have learned how to create facebook authentication in node js express with passport.

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