Question 1

How can I instantly invalidate a session with iron-session?

Accepted Answer

Since iron-session is stateless, immediate invalidation isn't built-in. You need to implement server-side checks, such as storing a blocklist in your database and validating it on each request, as suggested in the FAQ section on session invalidation.

Question 2

What's the main difference between iron-session and JWT?

Accepted Answer

iron-session uses encrypted cookies with @hapi/iron for security, focusing on simplicity and framework integration. JWT is a standard for tokens that are often not encrypted and require JWE for similar protection, making iron-session more suited for cookie-based sessions in web apps.

Question 3

How to use iron-session with Express.js?

Accepted Answer

Import getIronSession and use it with the req and res objects in your Express routes. Set up session options with a password and cookieName, then call session.save() after modifying session data, as shown in the Node.js/Express usage example in the README.

Question 4

Is there a limit to how much data I can store in an iron-session cookie?

Accepted Answer

Yes, cookies are typically limited to 4KB per domain. If your session data exceeds this, iron-session may not be suitable, and you might need a database-backed solution or alternative storage methods.

Question 5

How do I create magic login links using iron-session?

Accepted Answer

Use the sealData utility to encrypt user data with a time-to-live (ttl), then send the sealed token in a link. On the receiving end, use unsealData to decrypt and validate the token, as explained in the API section for secure token handling.

Question 6

Should I use iron-session or next-auth for Next.js authentication?

Accepted Answer

iron-session is lighter and more flexible for custom, stateless session management, while next-auth is a full-featured authentication library with built-in OAuth providers and database support. Choose iron-session for simplicity and control; next-auth for ready-made integrations.

next-iron-session

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