clean up

cache-images.go

@@ -298,7 +298,6 @@ func handleImageServe(w http.ResponseWriter, r *http.Request) {
 	if _, err := io.Copy(w, resp.Body); err != nil {
 		printWarn("Error writing image to response: %v", err)
 	}
-	return
 }
 
 func handleImageStatus(w http.ResponseWriter, r *http.Request) {
@@ -505,19 +504,12 @@ func cleanupCache() {
 	}
 }
 
-func getContentType(ext string) string {
-	switch strings.ToLower(ext) {
-	case "svg":
-		return "image/svg+xml"
-	case "jpg", "jpeg":
-		return "image/jpeg"
-	case "png":
-		return "image/png"
-	case "gif":
-		return "image/gif"
-	case "webp":
-		return "image/webp"
-	default:
-		return "application/octet-stream"
-	}
+// Serve missing.svg
+func serveMissingImage(w http.ResponseWriter, r *http.Request) {
+	missingImagePath := filepath.Join("static", "images", "missing.svg")
+	w.Header().Set("Content-Type", "image/svg+xml")
+	w.Header().Set("Cache-Control", "no-store, must-revalidate")
+	w.Header().Set("Pragma", "no-cache")
+	w.Header().Set("Expires", "0")
+	http.ServeFile(w, r, missingImagePath)
 }