From 705685e9185d281bff5499fab7f21a1df7616913 Mon Sep 17 00:00:00 2001
From: Catherine <whitequark@whitequark.org>
Date: Wed, 17 Sep 2025 14:55:46 +0000
Subject: [PATCH] Expose metadata when running on bunny.net magic containers.

---
 src/pages.go | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/pages.go b/src/pages.go
index e722be5..db3fea0 100644
--- a/src/pages.go
+++ b/src/pages.go
@@ -27,6 +27,15 @@ func getPage(w http.ResponseWriter, r *http.Request) error {
 
 	host := GetHost(r)
 
+	if _, onBunnyNet := os.LookupEnv("BUNNYNET_MC_APPID"); onBunnyNet {
+		w.Header().Set("X-Bunnynet-MC", fmt.Sprintf(
+			"%s, %s, %s",
+			os.Getenv("BUNNYNET_MC_REGION"),
+			os.Getenv("BUNNYNET_MC_ZONE"),
+			os.Getenv("BUNNYNET_MC_PODID"),
+		))
+	}
+
 	// allow JavaScript code to access responses (including errors) even across origins
 	w.Header().Set("Access-Control-Allow-Origin", "*")
 	w.Header().Set("Access-Control-Max-Age", "86400")