Autentikasi di App Router mencakup beberapa lapisan — sesi, middleware, pemeriksaan sisi server, dan melindungi Server Actions. Pendekatan modern lebih memilih verifikasi sesi sisi server daripada pemeriksaan klien saja.
Strategi sesi
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. Penjagaan kasar di middleware (cepat, tapi bukan seluruh cerita)
() {
session = req..()?.;
(req...() && !session) {
.( (, req.));
}
.();
}
