Golang ResponseWriter.CloseNotify Examples

Golang ResponseWriter.CloseNotify - 2 examples found. These are the top rated real world Golang examples of net/http.ResponseWriter.CloseNotify extracted from open source projects. You can rate examples to help us improve the quality of examples.
Example #1
0
func (th *teeHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
	t0 := time.Now()
	if *mimeType != "" {
		w.Header().Set("Content-Type", *mimeType)
	} else if *mp3only {
		w.Header().Set("Content-Type", "audio/mpeg")
	}
	cw := &countingWriter{Writer: w}
	sc := &signalCloser{Writer: cw, Closed: make(chan struct{})}
	log.Printf("%d +%+q", atomic.AddInt64(&th.clients, 1), req.RemoteAddr)
	th.Add(sc)

	errs := make(chan error)
	go func() {
		if w, ok := w.(http.CloseNotifier); ok {
			<-w.CloseNotify()
		} else {
			<-sc.Closed
		}
		errs <- th.RemoveAndClose(sc)
	}()
	err := <-errs
	errStr := ""
	if err != nil {
		errStr = err.Error()
	}

	t := time.Since(t0)
	log.Printf("%d -%+q %s %d =%dB/s %+q", atomic.AddInt64(&th.clients, -1), req.RemoteAddr, t, cw.Count(), int64(float64(cw.Count())/t.Seconds()), errStr)
}
Example #2
0
// Get a buffer from the pool -- but give up and return a non-nil
// error if resp implements http.CloseNotifier and tells us that the
// client has disconnected before we get a buffer.
func getBufferForResponseWriter(resp http.ResponseWriter, bufs *bufferPool, bufSize int) ([]byte, error) {
	var closeNotifier <-chan bool
	if resp, ok := resp.(http.CloseNotifier); ok {
		closeNotifier = resp.CloseNotify()
	}
	var buf []byte
	bufReady := make(chan []byte)
	go func() {
		bufReady <- bufs.Get(bufSize)
		close(bufReady)
	}()
	select {
	case buf = <-bufReady:
		return buf, nil
	case <-closeNotifier:
		go func() {
			// Even if closeNotifier happened first, we
			// need to keep waiting for our buf so we can
			// return it to the pool.
			bufs.Put(<-bufReady)
		}()
		return nil, ErrClientDisconnect
	}
}