Session Events (start, close)

[stefanwerfling]

Is your feature request related to a problem? Please describe

I searched the documentation and only found this: https://nginx.org/en/docs/njs/reference.html#s_on
I would like to know when a stream (which would also have to be a session) starts and closes again.

Describe the solution you'd like

It would be nice to have "start" and "close" on the event ".on()" for stream and http.

• start: A connection from the client is incoming (first connection from the client)
• close: The client disconnects

And to be able to identify the session using an “ID”.

async(s: NginxStreamRequest): Promise<void> => { 

   r.on('start', () => {
      const id = s.identifer();
      ....
   });

   r.on('close', () => {
      const id = s.identifer();
      // cleanup somthing
   });

}

As an alternative (This is actually a better approach to get “start” as an event.), I could also imagine having to create an event object/function:

stream {
	js_import mainstream from /opt/test.js;

	...

	server {
		listen 80;
		js_access mainstream.accessAddressStream;
		js_session_event mainstream.sessionEvent;
		...
	}
}

test.js:

const accessAddressStream = async(s: NginxStreamRequest): Promise<void> => {
.....
}

const sessionEvent = async(event: SessionEvent, s: NginxStreamRequest|NginxHTTPRequest, ): Promise<void> => {
	const id = s.identifer();

	switch(event) {
		case SessionEvent.start:
			.....
			break;

		case SessionEvent.start:
			.....
			break;
	}

.....
}

export default {accessAddressStream, sessionEvent};