readme: A way to detect disconnected clients

[phomlish]

	go func() {
		// Received Browser Disconnection
		<-ctx.Done()
		println("The client is disconnected here")
		return
	}()

the golang compiler complains:
undeclared name: ctx

[purehyperbole]

@phomlish

Sorry for not responding sooner. There was a typo in the readme which I will fix. The correct code is:

go func() {
	// Received Browser Disconnection
	<-r.Context().Done()
	println("The client is disconnected here")
	return
}()

[frederikhors]

I think we can close this now.

[phomlish]

That's working for me. Is there a way to somehow match the connection that was disconnected to one that was opened?

[drewp]

You could look at r.RemoteAddr at these two points:

	mux.HandleFunc("/foo", func(w http.ResponseWriter, r *http.Request) {
		log.Println("client connects", r.RemoteAddr)
		go func() {
			<-r.Context().Done()
			log.Println("client disconnected", r.RemoteAddr)
		}()

		server.ServeHTTP(w, r)
	})

2022/12/01 15:09:01 client connects 127.0.0.1:52370
2022/12/01 15:09:02 client disconnected 127.0.0.1:52370
2022/12/01 15:09:02 client connects 127.0.0.1:52382
2022/12/01 15:09:03 client disconnected 127.0.0.1:52382