How do I implement authentication in my Express.js app using Passport?

How do I implement authentication in my Express.js app using Passport?

To implement authentication in your Express.js app using Passport, you'll need to follow these steps: 1. Install Passport and its dependencies. 2. Set up your Express app and configure Passport. 3. Create user models and authentication strategies. 4. Implement login and registration routes. Would you like a code example?

Yes, please provide a code example for setting up Passport.

Sure! First, install Passport and the necessary strategies:

npm install passport passport-local express-session

Then, set up Passport in your app:

const passport = require('passport');
const LocalStrategy = require('passport-local').Strategy;

app.use(express-session({ secret: 'your_secret', resave: false, saveUninitialized: false }));
app.use(passport.initialize());
app.use(passport.session());

passport.use(new LocalStrategy((username, password, done) => {
    // Find user and validate password
}));

This is just the beginning. Would you like to know how to handle user sessions?

Yes, how do I handle user sessions with Passport?

To handle user sessions, you need to serialize and deserialize user instances. Here's how:

passport.serializeUser((user, done) => {
    done(null, user.id);
});

passport.deserializeUser((id, done) => {
    // Find user by ID and return user object
});

This allows Passport to manage user sessions effectively. Do you have any other questions?