Join us on the demo, while our product experts provide a detailed walkthrough of our enterprise platform.

LinkedIn Login using Node JS and passport

Learn social login benefits and how we can implement LinkedIn Login on our website or mobile app.

Aman Agrawal
Aman Agrawal
June 10, 2020
6 min read

This blog article will guide you to add "log in with LinkedIn" functionality in your application. Here we will be implementing Linkedin Login using NodeJS and Passport.

Passport is an authentication middleware for Node, which authenticates requests and delegates all other functionality to the application. Considering the unique application requirements, Passport has stuck to authentication mechanisms known as strategies. In the blog, we will be implementing a similar strategy for Login with Linkedin.

Pre -Requisites:

  1. Basic Knowledge of NodeJS
  2. Node JS should be installed on your system.

Steps to configure

  1. Creating Linkedin APP_ID and APP_SECRET
  2. Go to https://www.linkedin.com/developers/ and login with your Linkedin account.
  3. Once you have registered, click on the create app link and add the required details to create an app

Create Linkedin APP

Provide basic details about your app:

  • App name
  • Company
  • Privacy policy URL
  • Business email
  • App logo

    • After creating apps go to the auth tab in the navigation bar as shown below. You can now copy your secret and ID from here

    App ID and Secret

  • Now enough, let's move to code, First of all, create a directory named Linkedin-node-authentication

    mkdir Linkedin-node-authentication
  • Move to the directory Linkedin-node-authentication/
  cd Linkedin-node-authentication
  1. In the root create a file package.json and copy the following code

The dependencies, we are going to use in the projects are

{
  "name": "linkedin-login-node",
  "version": "1.0.0",
  "description": "Basic application for setting up Linkedin login using node and passport",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "node server.js"
  },
  "author": "LoginRadius",
  "license": "ISC",
  "dependencies": {
    "ejs": "^3.1.2",
    "express": "^4.17.1",
    "express-session": "^1.17.1",
    "passport": "^0.4.1",
    "passport-linkedin-oauth2": "^2.0.0"
  }
}
  1. After this run the following command in the terminal

    npm install
  2. Now create a file named server.js and paste the following code
const express = require('express');
const app = express();
const session = require('express-session');
const passport = require('passport');
const LinkedInStrategy = require('passport-linkedin-oauth2').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 LinkedInStrategy({
  clientID: config.linkedinAuth.clientID,
  clientSecret: config.linkedinAuth.clientSecret,
  callbackURL: config.linkedinAuth.callbackURL,
  scope: ['r_emailaddress', 'r_liteprofile'],
}, function (token, tokenSecret, profile, done) {
  return done(null, profile);
}
));

app.use('/', routes);

const port = 3000;

app.listen(port, () => {
  console.log('App listening on port ' + port);
});
  1. Now create a file named routes.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('/auth/linkedin', passport.authenticate('linkedin', {
  scope: ['r_emailaddress', 'r_liteprofile'],
}));

router.get('/auth/linkedin/callback',
  passport.authenticate('linkedin', {
    successRedirect: '/profile',
    failureRedirect: '/login'
  }));

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;
  1. Create a directory views and under this create a directory named pages. Under this folder create two pages named profile.ejs and index.ejs
// index.ejs
<!doctype html>
<html>

<head>
  <title>Linkedin 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>
    .linkedin {
      background-color: #0073b1 !important;
      color: #fff !important;
    }
    .fa-linkedin-f:before,
    .fa-linkedin:before {
      content: "\f0e1";
    }
  </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">Linkedin Login using Node and passport</span>
            </div>
            <div class="card-action">
              <a href="/auth/linkedin" class="waves-effect waves-light btn social linkedin">
                <i class="fa fa-linkedin"></i> Sign in with Linkedin
              </a>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</body>

</html>
<!- profile.ejs->
<!doctype html>
<html>

<head>  
  <title>LinkedIn 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>Linkedin id</strong>: <%= user.id %></p>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</body>

</html>
  1. Finally, when you are done with the above code you can now write all your app details gathered in step 1 to config.js file created in the root directory
module.exports = {
  'linkedinAuth': {
    'clientID': '<CLIENT_ID>', // your App ID
    'clientSecret': '<CLIENT_SECRET>', // your App Secret
    'callbackURL': 'http://127.0.0.1:3000/auth/linkedin/callback'
  }
}
  1. Let's have a final check with the repository, aftre follwoing all the steps in the same pordr the directory structure of your code will look like below:
// Final directory structure
Linkedin-node-authentication/
  --|node_modules
  --|views/
    |--|pages/
    |----|error.ejs
    |----|profile.ejs
    |----|index.ejs
  --|config.js
  --|package.json
  --|package-lock.json
  --|routes.js
  --|server.js
  1. Now run the server by executing below command in the directory Linkedin-node-authentication/
npm start
  1. Visit the browser with the URL http://localhost:3000

Linkedin login home page

Click on the sign in button, and you will be asked to login through Linkedin. Once logged in you will be redirected to profile page as below:

Linkedin login profile page

The complete sample code for the above tutorial can be found here



LoginRadius Docs

Implement Authentication in Minutes

click here

Most Popular Tags

EngineeringJavaScriptNodeJsReactCSSSecurityOAuthAuthenticationGoSocialLogin

Are your customers safe on your application?

According to Forbes, data breaches exposed 4.1 billion records in the first six months of 2019. If this gets you worried, we’ve got your back!

LoginRadius protects your customers’ identities. We provide world-class security for your customers during login, registration, password setup, and any other data touchpoints, and make sure that their data is safe. We do so through by offering open source SDKs, integrations with over 150 third party applications, pre-designed and customizable login interfaces, and best-in-class data security products such as MFA, RBA, and Advanced Password Policies. The platform is already loved by over 3,000 businesses with a monthly reach of 1.17 billion users worldwide.Secure Your Application Now

Aman Agrawal

Aman Agrawal

Aman is a software developer at LoginRadius and keen to learn and work upon new technologies.

View Profile

Try a Modern Authentication Solution

$0/ month

Free Sign Up
  • 7,000 Monthly Active Users
  • 1 Web or Mobile App
  • Email/Password Login
  • 3 Social Login Providers
  • User Data Storage
  • Transactional Email Template
  • Customizable Login Interfaces