The business logic is all outside of websocketd. There is no standard as to how to do this, so obviously the simplest way is to mimic CGI. Invocation happens when the status quo isn't enough, and the status quo until now was that there was no 10-second way to send whatever you want through websocket. It can happen now, and you can be the one to propose some better protocol for a websocket endpoint and a business logic process to discuss.
