How to create a login in Node.js with PassportJS and MongoDB?

In this post we will create a very simple login system in Node.js & Express with the help of PassportJS. We also need the help of Mongoose to access databases created in MongoDB.

Passport is authentication middleware for Node.js. Extremely flexible and modular, Passport can be unobtrusively dropped in to any Express-based web application. A comprehensive set of strategies support authentication using a username and password, Facebook, Twitter, and more.

We need to have installed:

          - Node.js      (If you don't have it click here)
          - Express      (If you don't have it click here)
          - MongoDB (If you don't have it click here)

Now, we will create our project:

Create the Project

1 - Open your terminal and headed to the directory where we want to create our project

2 - Write in the terminal:    $ express -s LoginApp  

 The "-s" causes that Express initialize and configure the session variables. if you see "app.js" have 2 new uses (app.use(express.cookieParser('your secret here')); app.use(express.session());

3 - Headed to the project folder and opened the file "package.json" and insert a new line in dependecies:

"dependencies": {     "express": "3.4.8",     "jade": "*",     "mongoose": "*",    "passport": "*",     "passport-local": "*",     "passport-local-mongoose": "*"   }

this is the module that will allow us to chat communications

4 - Choose de folder of the proyect in the terminal:    $  cd LoginApp  

5 - Install dependencies, write in the terminal:   $ npm install  

Create the DataBase

1 - Headed to the project folder and create a new folder called "Data".

2 -  Open your terminal and create de new DataBase, write: 

   $ mongod --dbpath  folder_data_url*     *change folder_data_url for your folder data url

 Warning: You can't close this terminal window.

Create the Model (Database)

1 - Headed to the project folder and create a new folder called "models".

2- Create a new file called "account.js" and write:

// call the libraries var mongoose = require('mongoose'),     Schema = mongoose.Schema,     passportLocalMongoose = require('passport-local-mongoose'); // create the object var Account = new Schema({     nickname: String,     birthdate: Date }); Account.plugin(passportLocalMongoose); // export the model module.exports = mongoose.model('Account', Account);

This is the model to keep the data in the database

Create the Server

Open the file "app.js" and write:

1 - Below "var path = require('path');" write:

// ... code var path = require('path'); var passport = require('passport'); var LocalStrategy = require('passport-local').Strategy; var mongoose = require('mongoose'); var app = express(); // ... code

2 - Below "app.use(express.session());" write:

// ... code app.use(express.cookieParser('your secret here')); app.use(express.session()); // Inicializate the session variable of Passport app.use(passport.initialize()); app.use(passport.session()); app.use(app.router); // ... code

3 - Below "app.use(express.errorHandler()); }" write:

// ... code if ('development' == app.get('env')) {   app.use(express.errorHandler()); } // passport config var Account = require('./models/account'); passport.use(new LocalStrategy(Account.authenticate())); passport.serializeUser(Account.serializeUser()); passport.deserializeUser(Account.deserializeUser()); // mongoose config mongoose.connect('mongodb://localhost/passport_local_mongoose'); var Account = require('./models/account'); // ... code

 4 - Create the routes

// ... code                   // redirect to index with user information                   app.get('/', function (req, res) {      res.render('index', { user : req.user });  });                 // Redirect to create a new user app.get('/register', function(req, res) {      res.render('register', { });  });                 // Save the new user with passport and mongoose and redirect to index app.post('/register', function(req, res) {    Account.register(new Account({ username : req.body.username }),                                   req.body.password, function(err, account) {        if (err) {            return res.render('register', { account : account });        }        passport.authenticate('local')(req, res, function () {          res.redirect('/');        });    });  });                 // Redirect to login page  app.get('/login', function(req, res) {      res.render('login', { user : req.user });  });                 // Check the login and redirect to index  app.post('/login', passport.authenticate('local'), function(req, res) {      res.redirect('/');  });                 // Logout and redirect to index  app.get('/logout', function(req, res) {      req.logout();      res.redirect('/');  }); // ... code

Create the Views

Open the folder "Views" and:

1 - Open "index.jade" and write:

2 - Create "login.jade" and write:

3 - Create "register.jade" and write:

becareful with the tabulated, jade is very sensitive with them

Run de App

Write in the terminal:   $ node app  and open your browser in localhost:3000/

I hope you liked it, and if you have any questions feel free to write me: