Redbean: How to listen to server-sent events?

[cloudspeech]

Hi, I am aware it is possible to send server-sent events (SSE) with Redbean resp. its Lua integration, cf. #159.

I also know that Fetch is exposed in Lua land. That's useful for one-shot request-response scenarios, and can set a keepalive flag.

What I could not figure out is whether it is possible to listen continously from inside Redbean to a SSE stream and invoke Lua callbacks whenever an event is received.

This is e.g. available in the OpenResty eco system, cf. https://github.com/wojons/lua-resty-sse.

Any ideas for how to write a SSE client, or proof it currently can or cannot be done in Redbean?

Thanks a lot, Markus