Criando nosso Middleware

Vamos criar um middleware muito simples, que deixa nosso website em modo de manutenção.

middleware.ts

import { NextResponse } from "next/server";
import type { NextRequest } from "next/server";

export function middleware(req: NextRequest) {
  const maintenanceMode = process.env.MAINTENANCE_MODE === "true";

  if (maintenanceMode && !req.nextUrl.pathname.startsWith("/maintenance")) {
    return NextResponse.redirect(new URL("/maintenance", req.url));
  }

  return NextResponse.next();
}

export const config = {
  matcher:
    "/((?!api|_next/static|_next/image|favicon.ico|sitemap.xml|robots.txt).*)",
};