How to Create Login and Registration Form in MySQL?

Hello Friends,

In this course we are going to build a complete Login and Registration system using Node.js and MySQL as a database. A registration form is used to collect data from potential users of your website.

User login and registration is an important functionality of web applications to allow users to create accounts and log in. The functionality is created for user authentication to allow users to access different resources according to the user role.

Step 1: Install Node Express JS Setup

The following command install express js setup:

express --view=ejs myApp

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

cd loginSystem

Your node express js app structure looks like:

Next, you need to install some required packages, so open again your cmd and run the following commands:

 npm install    
 npm install express-flash --save
 npm install express-session --save
 npm install express-validator --save
 npm install method-override --save
 npm install mysql --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 make a session like in PHP. In this node js MySQL crud tutorial, the session is needed as the express requirement of express-flash.

express-validator
Express-validator is used to validate form data it is easy to use. an express-validator highly effective and efficient way to accelerate the creation of applications.

method-override
NPM is used to run a DELETE and PUT method from an HTML form. Several web browsers only support GET and POST methods.

MySQL
Driver to connect node.js with MySQL

Step 2: Connect Node js Express with DB

Before connecting DB to your application, create table in your database by using the following SQL query:

CREATE DATABASE IF NOT EXISTS `myapp` DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
USE `nodelogin`;
 
CREATE TABLE IF NOT EXISTS `users` (
    `id` int(11) NOT NULL,
    `name` varchar(50) NOT NULL,
    `password` varchar(255) NOT NULL,
    `email` varchar(100) NOT NULL
) 
ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
 
INSERT INTO `users` (`id`, `name`, `password`, `email`) VALUES (1, 'test', 'test', 'test@test.com');
 
ALTER TABLE `users` ADD PRIMARY KEY (`id`);
ALTER TABLE `users` MODIFY `id` int(11) NOT NULL AUTO_INCREMENT,AUTO_INCREMENT=2;

Next, you need to create one folder named lib and create a new file name db.js inside the lib folder.

Note that This file is used to connect your node express js app to MySQL DB.

lib/db.js

Update the MySQL connection code into your db.js file:

var mysql=require('mysql');

var connection=mysql.createConnection({
    host:'localhost',
    user:'root',
    password:'your password',
    database:'myapp'
});

connection.connect(function(error){
    if(!!error){
        console.log(error);
    }else{
        console.log('Connected!:)');
    }
});  

module.exports = connection; 

Step 3: Import Packages and routes in the app.js

In this step, you need to include all packages in app.js file installed above and also initialize the session in this file.

So go to app.js file and update the following code:

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var expressValidator = require('express-validator');
var flash = require('express-flash');
var session = require('express-session');
var bodyParser = require('body-parser');
 
var mysql = require('mysql');
var connection  = require('./lib/db');
 
var authRouter = require('./routes/auth');
 
var app = express();
 
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
 
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
 
app.use(session({ 
    secret: '123456cat',
    resave: false,
    saveUninitialized: true,
    cookie: { maxAge: 60000 }
}))
 
app.use(flash());
app.use(expressValidator());
 
app.use('/auth', authRouter);
 
// catch 404 and forward to error handler
app.use(function(req, res, next) {
    next(createError(404));
});
 
// error handler
app.use(function(err, req, res, next) {

    // set locals, only providing error in development
    res.locals.message = err.message;
    res.locals.error = req.app.get('env') === 'development' ? err : {};
 
    // render the error page
    res.status(err.status || 500);
    res.render('error');
});

// port must be set to 3000 because incoming http requests are routed from port 80 to port 8080
app.listen(3000, function () {
    console.log('Node app is running on port 3000');
});

module.exports = app;

Step 4: Create Route

In this step, you need to create one route file name auth.js inside the routes folder.

Then update the following routes into your routes/auth.js file:

var express = require('express');
var router = express.Router();
var connection  = require('../lib/db');

//display login page
router.get('/', function(req, res, next){    
    res.render('auth/login', {
        title: 'Login',
        email: '',
        password: ''     
    })
})

//display login page
router.get('/login', function(req, res, next){    
    res.render('auth/login', {
        title: 'Login',
        email: '',
        password: ''    
    })
})

//authenticate user
router.post('/authentication', function(req, res, next) {
    var email = req.body.email;
    var password = req.body.password;
    connection.query('SELECT * FROM accounts WHERE email = ? AND password = ?', [email, password], function(err, rows, fields) {
        if(err) throw err
        
        // if user not found
        if (rows.length <= 0) {
            req.flash('error', 'Please correct enter email and Password!')
            res.redirect('/login')
        }
        else { 
            // if user found
            // render to views/user/edit.ejs template file
            req.session.loggedin = true;
            req.session.name = name;
            res.redirect('/home');
        }            
    })
})

//display login page
router.get('/register', function(req, res, next){    
    res.render('auth/register', {
        title: 'Registration Page',
        name: '',
        email: '',
        password: ''    
    })
})

// user registration
router.post('/post-register', function(req, res, next){    
    req.assert('name', 'Name is required').notEmpty()           //Validate name
    req.assert('password', 'Password is required').notEmpty()   //Validate password
    req.assert('email', 'A valid email is required').isEmail()  //Validate email
    var errors = req.validationErrors()
    if( !errors ) {   
        //No errors were found.  Passed Validation!
        var user = {
            name: req.sanitize('name').escape().trim(),
            email: req.sanitize('email').escape().trim(),
            password: req.sanitize('password').escape().trim()
        }
        connection.query('INSERT INTO users SET ?', user, function(err, result) {
            
            //if(err) throw err
            if (err) {
                req.flash('error', err)
                res.render('auth/register', {
                    title: 'Registration Page',
                    name: '',
                    password: '',
                    email: ''                   
                })
            } else {                
                req.flash('success', 'You have successfully signup!');
                res.redirect('/login');
            }
        })
    }
    else {   
        //Display errors to user
        var error_msg = ''
        errors.forEach(function(error) {
            error_msg += error.msg + '<br>'
        })
        req.flash('error', error_msg)
        /**
        * Using req.body.name 
        * because req.param('name') is deprecated
        */
        res.render('auth/register', { 
            title: 'Registration Page',
            name: req.body.name,
            email: req.body.email,
            password: ''
        })
    }
})

//display home page
router.get('/home', function(req, res, next) {
    if (req.session.loggedin) {
        res.render('auth/home', {
            title:"Dashboard",
            name: req.session.name,
        });
    } else {
        req.flash('success', 'Please login first!');
        res.redirect('/login');
    }
});

// Logout user
router.get('/logout', function (req, res) {
    req.session.destroy();
    req.flash('success', 'Login Again Here');
    res.redirect('/login');
});

module.exports = router;

Step 5: Create Login and Registration Views

In this step, you need to create one folder name Auth. So go to the views folder in your app and create the Auth folder.

Inside the Auth folder, you need to create two views files. The views file is the following:

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

<!DOCTYPE html>
<html>
    <head>
        <title>How to Create Login and Registration Form in MySQL? - Nicesnippets.com</title>
        <script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>
        <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script>
        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
    </head>
    <body>
        <% if (messages.error) { %>
        <p style="color:red"><%- messages.error %></p>
        <% } %>
        <% if (messages.success) { %>
        <p style="color:green"><%- messages.success %></p>
        <% } %>
        <form action="/auth/authentication" method="post" name="form1">
            <div class="form-group">
                <label for="exampleInputEmail1">Email</label>
                <input type="email" name="email" class="form-control" id="email" aria-describedby="emailHelp" placeholder="Enter email" value="">
            </div>
            <div class="form-group">
                <label for="exampleInputEmail1">Password</label>
                <input type="password" name="password" class="form-control" id="password" aria-describedby="emailHelp" placeholder="*********" value="">
            </div>
            <input type="submit" class="btn btn-primary" value="Add">
            <a href="auth/register" class="btn btn-success ml-2">Register Here</a>
        </form>
    </body>
</html>

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

<!DOCTYPE html>
<html>
    <head>
        <title>How to Create Login and Registration Form in MySQL? - Nicesnippets.com</title>
        <script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>
        <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script>
        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
    </head>
    <body>
        <% if (messages.error) { %>
        <p style="color:red"><%- messages.error %></p>
        <% } %>
        <% if (messages.success) { %>
        <p style="color:green"><%- messages.success %></p>
        <% } %>
        <form action="/auth/post-register" method="post" name="form1">
            <div class="form-group">
                <label for="exampleInputEmail1">Name</label>
                <input type="name" name="name" class="form-control" id="name" aria-describedby="nameHelp" placeholder="Enter name" value="">
            </div>   
            <div class="form-group">
                <label for="exampleInputEmail1">Email</label>
                <input type="email" name="email" class="form-control" id="email" aria-describedby="emailHelp" placeholder="Enter email" value="">
            </div>
            <div class="form-group">
                <label for="exampleInputEmail1">Password</label>
                <input type="password" name="password" class="form-control" id="password" aria-describedby="emailHelp" placeholder="*********" value="">
            </div>
            <input type="submit" class="btn btn-primary" value="Add">
            <a href="auth/login" class="btn btn-success ml-2">Login</a>
        </form> 
    </body>
</html>

This log in.ejs file contains the login form.

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

<!DOCTYPE html>
<html>
    <head>
        <title>How to Create Login and Registration Form in MySQL? - Nicesnippets.com</title>
        <script src="https://code.jquery.com/jquery-3.4.1.min.js"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>
        <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script>
        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css">
    </head>
    <body>
        <div class="container">
            <% if (messages.error) { %>
            <p style="color:red"><%- messages.error %></p>
            <% } %>
            <% if (messages.success) { %>
            <p style="color:green"><%- messages.success %></p>
            <% } %>
            <div class="card">
                <div class="card-header">
                    Dashboard <b><%= name %></b>
                </div>
                <div class="card-body">
                    <h5 class="card-title">Welcome</h5>
                    <p class="card-text">You have successfully login</p>
                    <a href="auth/logout" class="btn btn-primary">Logout</a>
                </div>
            </div>
        </div>
    </body>
</html>

Step 6: Run Development Server

You can use the following command to run the development server:

//run the below command
npm start

After running this command open your browser and hit

http://127.0.0.1:3000/auth
OR
http://127.0.0.1:3000/auth/login

I hope it can help you...