svrjs-nextjs-website/middleware.ts

import { NextResponse } from "next/server";
import type { NextRequest } from "next/server";
import { getToken } from "next-auth/jwt";

export async function middleware(req: NextRequest) {
	const token = await getToken({ req, secret: process.env.NEXTAUTH_SECRET });

	if (req.nextUrl.pathname.startsWith("/admin") && !token) {
		const url = req.nextUrl.clone();
		url.pathname = "/login";
		return NextResponse.redirect(url);
	}

	return NextResponse.next();
}

export const config = {
	matcher: [
		"/admin/:path*",
		"/api/delete/downloads/[id]",
		"/api/delete/logs/[id]",
		"/api/delete/mods/[id]",
		"/api/upload",
		"/api/uploadlogs",
		"/api/uploadmods",
		"/api/uploadthing",
	],
};