From 55b26751ae175b4a357404fdd41e1b9ca42c3d79 Mon Sep 17 00:00:00 2001
From: cschwinne <dev.aircoookie@gmail.com>
Date: Thu, 27 May 2021 11:09:57 +0200
Subject: [PATCH] Cache CORS preflight request

---
 wled00/wled_server.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/wled00/wled_server.cpp b/wled00/wled_server.cpp
index ef90a077..28762392 100644
--- a/wled00/wled_server.cpp
+++ b/wled00/wled_server.cpp
@@ -224,7 +224,10 @@ void initServer()
     //make API CORS compatible
     if (request->method() == HTTP_OPTIONS)
     {
-      request->send(200); return;
+      AsyncWebServerResponse *response = request->beginResponse(200);
+      response->addHeader(F("Access-Control-Max-Age"), F("7200"));
+      request->send(response);
+      return;
     }
     
     if(handleSet(request, request->url())) return;