I want the server is ready to serve any request. But unfortunately it takes some time to be ready.

Why?

That's not intentional, and I've never experienced that.

If there's a problem, the fix is to make Start do the right thing, and not to add more API like Wait.

Why do you think Start doesn't work immediately? Got a reproducible example of a failure? Or an idea of why the code is wrong?

Because it call Server.goServe which start a new goroutine, and in theory, it takes time.

@bradfitz I think we can notify the parent goroutine when the below goroutine is running.

func (s *Server) goServe() {
	s.wg.Add(1)
	go func() {
		defer s.wg.Done()
		s.Config.Serve(s.Listener)
	}()
}

But the net.Listener is already listening before that's called. So it'll still accept the connection, and then in a tiny amount of time (under milliseconds) it'll handle it.

I see no problem.

Oh, so i missed the listener.

No worries. Glad there's not a problem to fix. :)

Thank you .