Add Cache-Control header to response so Stremio caches catalog responses

handlers.go

@@ -70,6 +70,7 @@ func catalogHandler(w http.ResponseWriter, r *http.Request) {
 
 	log.Debugf("Responding with: %s\n", catalogResponse)
 	w.Header().Set("Content-Type", "application/json")
+	w.Header().Set("Cache-Control", "max-age="+resCacheSeconds)
 	if _, err := w.Write(catalogResponse); err != nil {
 		log.Errorf("Coldn't write response: %v\n", err)
 	}

main.go

@@ -96,6 +96,11 @@ var (
 	palmeDorCatalogResponse         []byte
 )
 
+var (
+	// Time used in response header so the client caches responses this long
+	resCacheSeconds = strconv.Itoa(1 * 24 * 60 * 60) // 1d
+)
+
 func init() {
 	// Timeout for global default HTTP client (for when using `http.Get()`)
 	http.DefaultClient.Timeout = 5 * time.Second