Only cache content in /_app

.changeset/strong-files-obey.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/adapter-node': patch
+---
+
+Only cache files in /\_app/

packages/adapter-node/src/server.js

@@ -1,11 +1,11 @@
+import '@sveltejs/kit/install-fetch'; // eslint-disable-line import/no-unresolved
+import { getRawBody } from '@sveltejs/kit/node'; // eslint-disable-line import/no-unresolved
+import compression from 'compression';
 import fs from 'fs';
 import { dirname, join } from 'path';
-import { fileURLToPath } from 'url';
-import compression from 'compression';
 import polka from 'polka';
 import sirv from 'sirv';
-import { getRawBody } from '@sveltejs/kit/node'; // eslint-disable-line import/no-unresolved
-import '@sveltejs/kit/install-fetch'; // eslint-disable-line import/no-unresolved
+import { fileURLToPath } from 'url';
 
 // App is a dynamic file built from the application layer.
 
@@ -29,8 +29,11 @@ export function createServer({ render }) {
 
  const assets_handler = fs.existsSync(paths.assets)
  ? sirv(paths.assets, {
- maxAge: 31536000,
- immutable: true
+ setHeaders: (res, pathname, stats) => {
+ if (pathname.startsWith('/_app/')) {
+ res.setHeader('cache-control', 'public, max-age=31536000, immutable');
+ }
+ }
  })
  : noop_handler;