Add cache-control header to images

rcy · Dec 12, 2024 · 4dadf7c · 4dadf7c
1 parent 041597d
commit 4dadf7c
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/web/server.go b/web/server.go
@@ -460,7 +460,12 @@ func Serve(db *sqlx.DB, b *bot.Bot) {
 	})
 
 	fs := http.FileServer(http.Dir(image.ImageFileBase))
-	r.Handle("/images/*", http.StripPrefix("/images/", fs))
+	r.Handle("/images/*",
+		http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.Header().Set("Cache-Control", fmt.Sprintf("public, max-age=%.0f", (time.Hour*24*365).Seconds()))
+			http.StripPrefix("/images/", fs).ServeHTTP(w, r)
+		}),
+	)
 
 	addr := ":" + os.Getenv("PORT")
 	log.Printf("web server listening on %s", addr)