school_compare/nextjs-app/app/sitemaps/[...parts]/route.ts

import { NextResponse } from 'next/server';
import { proxySitemap } from '@/lib/sitemapProxy';

export const dynamic = 'force-dynamic';
export const runtime = 'nodejs';

/**
 * Children are /sitemaps/static.xml and /sitemaps/schools-{n}.xml. The name is
 * validated here rather than passed through, so this route cannot be used to
 * reach arbitrary backend paths.
 */
const CHILD = /^(static|schools-\d+|places-\d+|outcodes-\d+)\.xml$/;

export async function GET(
  _request: Request,
  { params }: { params: Promise<{ parts: string[] }> },
) {
  const { parts } = await params;
  const name = parts.join('/');
  if (!CHILD.test(name)) {
    return new NextResponse('Not found', { status: 404 });
  }
  return proxySitemap(`/sitemaps/${name}`);
}