http ResponseWriter的CloseNotifier

Question

i am using go 1.4.2 and the implementation doesn't seem to have CloseNotifier as i want to use it in a long polling handler with something like:

func Pollhandler(w http.ResponseWriter, r *http.Request) {

    notify := w.(CloseNotifier).CloseNotify()

    <-notify //should block until the http connection is closed

}

is the CloseNotifier not implemented for the http ResponseWriter? if so how can i get around this? or is there any implementation for http ResponseWriter that implements the CloseNotifier interface?

Answer 1

http.CloseNotifier has been there since Go 1.1. Your code doesn't work because you forgot the package part:

notify := w.(http.CloseNotifier).CloseNotify()