From 57bef210f6cf244d4682fb49f0eb5a93560b8198 Mon Sep 17 00:00:00 2001
From: Harlan Wilton <harlan@harlanzw.com>
Date: Sat, 6 Jan 2024 15:44:08 +1100
Subject: [PATCH] fix: cache headers for prerendered sitemap

---
 src/module.ts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/module.ts b/src/module.ts
index d19a38b..620cf27 100644
--- a/src/module.ts
+++ b/src/module.ts
@@ -270,6 +270,8 @@ declare module 'vue-router' {
       // add route rules for sitemap xmls so they're rendered properly
       routeRules.headers = {
         'Content-Type': 'text/xml; charset=UTF-8',
+        'Cache-Control': config.cacheMaxAgeSeconds ? `public, max-age=${config.cacheMaxAgeSeconds}, must-revalidate` : 'no-cache, no-store',
+        'X-Sitemap-Prerendered': new Date().toISOString(),
       }
     }
     if (!nuxt.options.dev && !isNuxtGenerate() && config.cacheMaxAgeSeconds && config.runtimeCacheStorage !== false) {