ESP32 Forum

Many versions of Safari (on MacOS) have a bug in which if given an http:// url they first try the corresponding https:// url. This causes a 5 second delay in accessing http:// links on an ESP32.

Is there a way to get the ESP32 to quickly reject any HTTPS requests (port 443) so that Safari does not wait 5 seconds for a response.?

I've found resources for setting up an actual https server on an ESP32, but I don't want to incur the overhead of an actual server. I just want to quickly and efficiently inform misguided we browsers that there is no point in sending requests on port 443.

You can base your response on the WiFiServer example. If you get a connection on port 443, just immediately send a error response. At line 70, instead of reading anything in, print a 501 response (a la line 80), and then send a stop. It may even be more effective to just send the stop.