If you're interested in Passport, we also have examples for it using secure and encrypted cookies: If you want a full-featured authentication system with built-in providers (Google, Facebook, GitHub…), JWT, JWE, email/password, magic links and more… use next-auth.īoth of these libraries support either authentication pattern.If you want a low-level, encrypted, and stateless session utility use iron-session.If you have an existing database with user data, you'll likely want to utilize an open-source solution that's provider agnostic. Now that we've discussed authentication patterns, let's look at specific providers and explore how they're used with Next.js. To prevent creating a bottleneck and increasing your TTFB ( Time to First Byte), you should ensure your authentication lookup is fast. It's important to note fetching user data in getServerSideProps will block rendering until the request to your authentication provider resolves. Once the request for a user has finished, it will show the user's name: // pages/profile.js import useUser from './lib/useUser' import Layout from './components/Layout' const Profile = ( ) => export default ProfileĪn advantage of this pattern is preventing a flash of unauthenticated content before redirecting. This will initially render a loading skeleton. Let's look at an example for a profile page. In practice, this results in a faster TTI ( Time to Interactive). One advantage of this pattern is it allows pages to be served from a global CDN and preloaded using next/link.

Instead, your page can render a loading state from the server, followed by fetching the user client-side. This means the absence of getServerSideProps and getInitialProps in the page. Next.js automatically determines that a page is static if there are no blocking data requirements.

Fetch user data server-side to eliminate a flash of unauthenticated content.Īuthenticating Statically Generated Pages.

Use static generation to server-render a loading state, followed by fetching user data client-side.

Once you've installed AuthenticationMiddleware with an appropriate authentication backend the er and th interfaces will be available in your endpoints. We can then determine which authentication providers support this strategy. Starlette offers a simple but powerful interface for handling authentication and permissions. The first step to identifying which authentication pattern you need is understanding the data-fetching strategy you want. This page will go through each case so that you can choose based on your constraints. Next.js supports multiple authentication patterns, each designed for different use cases.

Authentication verifies who a user is, while authorization controls what a user can access.

Securityspy authentication error