From 6d221a07dd14c75854622fd9924005aae6165d2a Mon Sep 17 00:00:00 2001
From: Julien Herr <julien@herr.fr>
Date: Thu, 21 May 2026 23:06:18 +0200
Subject: [PATCH] feat(websub): add hub discovery Link headers to RSS and Atom
 feeds

---
 src/routes/atom.ts | 6 ++++++
 src/routes/rss.ts  | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/src/routes/atom.ts b/src/routes/atom.ts
index c05bea5..22479e2 100644
--- a/src/routes/atom.ts
+++ b/src/routes/atom.ts
@@ -51,11 +51,17 @@ export async function handle(c: Context): Promise<Response> {
     const baseUrl = `https://${env.DOMAIN}`;
     const atomXml = generateAtomFeed(feedConfig, emailsData, baseUrl, feedId);
 
+    const linkHeader = [
+      `<https://${env.DOMAIN}/hub>; rel="hub"`,
+      `<https://${env.DOMAIN}/atom/${feedId}>; rel="self"`,
+    ].join(", ");
+
     return new Response(atomXml, {
       status: 200,
       headers: {
         "Content-Type": "application/atom+xml",
         "Cache-Control": "max-age=1800",
+        Link: linkHeader,
       },
     });
   } catch (error) {
diff --git a/src/routes/rss.ts b/src/routes/rss.ts
index 1e6a23d..88e1da3 100644
--- a/src/routes/rss.ts
+++ b/src/routes/rss.ts
@@ -65,11 +65,17 @@ export async function handle(c: Context): Promise<Response> {
     const rssXml = generateRssFeed(feedConfig, emailsData, baseUrl, feedId);
 
     // Return the RSS feed with appropriate content type
+    const linkHeader = [
+      `<https://${env.DOMAIN}/hub>; rel="hub"`,
+      `<https://${env.DOMAIN}/rss/${feedId}>; rel="self"`,
+    ].join(", ");
+
     return new Response(rssXml, {
       status: 200,
       headers: {
         "Content-Type": "application/rss+xml",
         "Cache-Control": "max-age=1800", // 30 minutes cache
+        Link: linkHeader,
       },
     });
   } catch (error) {