Exemplo n.º 1
0
// ServeHTTP is necessary to implement the http.Handler interface. It
// will snappy a response if the appropriate request headers are set.
func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	// Check if we're draining; if so return 503, service unavailable.
	if !s.stopper.RunTask(func() {
		// This is our base handler, so catch all panics and make sure they stick.
		defer log.FatalOnPanic()

		// If server is not available, return 503 http response code.
		select {
		case <-s.httpReady:
			// Proceed.
		default:
			http.Error(w, "node not yet available", http.StatusServiceUnavailable)
			return
		}
		// Disable caching of responses.
		w.Header().Set("Cache-control", "no-cache")

		ae := r.Header.Get(util.AcceptEncodingHeader)
		switch {
		case strings.Contains(ae, util.SnappyEncoding):
			w.Header().Set(util.ContentEncodingHeader, util.SnappyEncoding)
			s := newSnappyResponseWriter(w)
			defer s.Close()
			w = s
		case strings.Contains(ae, util.GzipEncoding):
			w.Header().Set(util.ContentEncodingHeader, util.GzipEncoding)
			gzw := newGzipResponseWriter(w)
			defer gzw.Close()
			w = gzw
		}
		s.mux.ServeHTTP(w, r)
	}) {
		http.Error(w, "service is draining", http.StatusServiceUnavailable)
	}
}
Exemplo n.º 2
0
// ServeHTTP is necessary to implement the http.Handler interface.
func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	// This is our base handler, so catch all panics and make sure they stick.
	defer log.FatalOnPanic()

	// Disable caching of responses.
	w.Header().Set("Cache-control", "no-cache")

	ae := r.Header.Get(util.AcceptEncodingHeader)
	switch {
	case strings.Contains(ae, util.GzipEncoding):
		w.Header().Set(util.ContentEncodingHeader, util.GzipEncoding)
		gzw := newGzipResponseWriter(w)
		defer gzw.Close()
		w = gzw
	}
	s.mux.ServeHTTP(w, r)
}