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school_compare/nextjs-app/app/sitemap.xml/route.ts
TudorandClaude Fable 5 95a5783da1
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fix(frontend): proxy /api and /sitemap.xml at runtime, not via baked rewrites
next.config.js rewrites() bakes its destination into the build
(routes-manifest.json), capturing FASTAPI_URL at build time. Because one
frontend image is promoted staging->prod, the baked backend host forced
every environment to name the backend service identically; staging names
it 'backend_stg', so the browser's /api/* calls proxied to the baked
'http://backend' and failed with getaddrinfo ENOTFOUND backend. (SSR was
unaffected because lib/api.ts reads FASTAPI_URL at runtime.)

Replace the rewrites with route handlers that read FASTAPI_URL per
request:
- app/api/[...path]/route.ts — transparent proxy for all methods, streams
  the response, strips hop-by-hop headers, and returns 502 on upstream
  failure instead of crashing.
- app/sitemap.xml/route.ts — proxies the backend sitemap (robots.ts points
  crawlers here).

The same promoted image now adapts to whatever the backend is called in
each environment. Verified: production build succeeds with /api/[...path]
and /sitemap.xml as dynamic routes and an empty rewrites manifest.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-06 10:00:42 +01:00

33 lines
1.0 KiB
TypeScript

/**
* Runtime proxy for /sitemap.xml → the FastAPI backend's generated sitemap.
*
* Like the /api/* proxy, this reads FASTAPI_URL at request time rather than
* baking the backend host into the build, so one image works in every
* environment. robots.ts points crawlers here.
*/
import { NextResponse } from 'next/server';
export const dynamic = 'force-dynamic';
export const runtime = 'nodejs';
function backendOrigin(): string {
const base = process.env.FASTAPI_URL || process.env.NEXT_PUBLIC_API_URL || 'http://localhost:8000/api';
return base.replace(/\/api$/, '');
}
export async function GET() {
let upstream: Response;
try {
upstream = await fetch(`${backendOrigin()}/sitemap.xml`, { cache: 'no-store' });
} catch {
return new NextResponse('Sitemap temporarily unavailable', { status: 502 });
}
const body = await upstream.text();
return new NextResponse(body, {
status: upstream.status,
headers: { 'content-type': upstream.headers.get('content-type') || 'application/xml' },
});
}