Enhance Your Node.js App Security with connect-ensure-login

Introduction

connect-ensure-login is a simple yet powerful middleware for Node.js applications that ensures a user is authenticated before allowing access to certain routes. This can enhance the security of your application by preventing unauthorized access to restricted areas.

Getting Started

To use connect-ensure-login, you first need to install it:

  npm install connect-ensure-login

Next, you can include it in your application:

  const ensureLoggedIn = require('connect-ensure-login').ensureLoggedIn;

API Examples

Here are some useful APIs provided by connect-ensure-login:

  // Ensure the user is logged in for accessing a specific route
  app.get('/profile', ensureLoggedIn('/login'), (req, res) => {
      res.send('Hello, ' + req.user.username);
  });

  // Redirect to login if the user is not authenticated
  app.get('/protected', ensureLoggedIn(), (req, res) => {
      res.send('Welcome to the protected area, ' + req.user.username);
  });

  // Custom redirect function
  const ensureAdmin = require('connect-ensure-login').ensureLoggedIn({ redirectTo: '/admin-login' });

  app.get('/admin', ensureAdmin, (req, res) => {
      res.send('Welcome Admin, ' + req.user.username);
  });

Application Example

Here is a simple example of how you can use connect-ensure-login in a full application:

  const express = require('express');
  const app = express();
  const ensureLoggedIn = require('connect-ensure-login').ensureLoggedIn;
  const passport = require('passport');
  const session = require('express-session');

  // Initialize passport
  app.use(session({ secret: 'secret', resave: false, saveUninitialized: false }));
  app.use(passport.initialize());
  app.use(passport.session());

  // Define routes
  app.get('/login', (req, res) => {
      res.send('Login Page');
  });

  app.get('/profile', ensureLoggedIn('/login'), (req, res) => {
      res.send('Hello, ' + req.user.username);
  });

  app.post('/login', passport.authenticate('local'), (req, res) => {
      res.redirect('/profile');
  });

  // Start server
  app.listen(3000, () => {
      console.log('Server started on http://localhost:3000');
  });

By using connect-ensure-login, you can easily protect routes in your application and ensure only authenticated users have access to sensitive areas.

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