Autentificering i App Router strækker sig over flere lag — sessions, middleware, server-side-kontroller og beskyttelse af Server Actions. Den moderne tilgang favoriserer server-side session-verifikation frem for kun client-side-kontroller.
Session-strategi
Cookie-based sessions (httpOnly cookie):
✓ Store a signed session id or encrypted JWT in an httpOnly, secure cookie
✓ httpOnly = not readable by JavaScript → protects against XSS token theft
✓ Use a library: Auth.js (NextAuth), Clerk, Lucia, or a custom solution
1. Grov gatekeeping i middleware (hurtig, men ikke hele historien)
() {
session = req..()?.;
(req...() && !session) {
.( (, req.));
}
.();
}
