Example #1
0
func (pr *consulPipeRouter) privateAPI() {
	router := mux.NewRouter()
	router.Methods("GET").
		MatcherFunc(app.URLMatcher("/private/api/pipe/{key}")).
		HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			key := mux.Vars(r)["key"]
			log.Infof("%s: Server bridge connection started", key)
			defer log.Infof("%s: Server bridge connection stopped", key)

			pipe := pr.getPipe(key)
			if pipe == nil {
				log.Errorf("%s: Server bridge connection; Unknown pipe!", key)
				w.WriteHeader(http.StatusNotFound)
				return
			}

			conn, err := xfer.Upgrade(w, r, nil)
			if err != nil {
				log.Errorf("%s: Server bridge connection; Error upgrading to websocket: %v", key, err)
				return
			}
			defer conn.Close()

			end, _ := pipe.Ends()
			if err := pipe.CopyToWebsocket(end, conn); err != nil && !xfer.IsExpectedWSCloseError(err) {
				log.Errorf("%s: Server bridge connection; Error copying pipe to websocket: %v", key, err)
			}
		})

	log.Infof("Serving private API on endpoint %s.", pr.advertise)
	log.Infof("Private API terminated: %v", http.ListenAndServe(pr.advertise, router))
}
Example #2
0
// handleProbeWS accepts websocket connections from the probe and registers
// them in the control router, such that HandleControl calls can find them.
func handleProbeWS(cr ControlRouter) CtxHandlerFunc {
	return func(ctx context.Context, w http.ResponseWriter, r *http.Request) {
		probeID := r.Header.Get(xfer.ScopeProbeIDHeader)
		if probeID == "" {
			respondWith(w, http.StatusBadRequest, xfer.ScopeProbeIDHeader)
			return
		}

		conn, err := xfer.Upgrade(w, r, nil)
		if err != nil {
			log.Printf("Error upgrading control websocket: %v", err)
			return
		}
		defer conn.Close()

		codec := xfer.NewJSONWebsocketCodec(conn)
		client := rpc.NewClientWithCodec(codec)
		defer client.Close()

		id, err := cr.Register(ctx, probeID, func(req xfer.Request) xfer.Response {
			var res xfer.Response
			if err := client.Call("control.Handle", req, &res); err != nil {
				return xfer.ResponseError(err)
			}
			return res
		})
		if err != nil {
			respondWith(w, http.StatusBadRequest, err.Error())
			return
		}
		defer cr.Deregister(ctx, probeID, id)
		if err := codec.WaitForReadError(); err != nil && err != io.EOF && !xfer.IsExpectedWSCloseError(err) {
			log.Errorf("Error on websocket: %v", err)
		}
	}
}
Example #3
0
func handlePipeWs(pr PipeRouter, end End) CtxHandlerFunc {
	return func(ctx context.Context, w http.ResponseWriter, r *http.Request) {
		id := mux.Vars(r)["pipeID"]
		pipe, endIO, err := pr.Get(ctx, id, end)
		if err != nil {
			log.Errorf("Error getting pipe %s: %v", id, err)
			http.NotFound(w, r)
			return
		}
		defer pr.Release(ctx, id, end)

		conn, err := xfer.Upgrade(w, r, nil)
		if err != nil {
			log.Errorf("Error upgrading pipe %s (%d) websocket: %v", id, end, err)
			return
		}
		defer conn.Close()

		log.Infof("Success got pipe %s:%s", id, end)
		if err := pipe.CopyToWebsocket(endIO, conn); err != nil && !xfer.IsExpectedWSCloseError(err) {
			log.Printf("Error copying to pipe %s (%d) websocket: %v", id, end, err)
		}
	}
}
Example #4
0
// Websocket for the full topology.
func handleWebsocket(
	ctx context.Context,
	rep Reporter,
	w http.ResponseWriter,
	r *http.Request,
) {
	if err := r.ParseForm(); err != nil {
		respondWith(w, http.StatusInternalServerError, err.Error())
		return
	}
	loop := websocketLoop
	if t := r.Form.Get("t"); t != "" {
		var err error
		if loop, err = time.ParseDuration(t); err != nil {
			respondWith(w, http.StatusBadRequest, t)
			return
		}
	}

	conn, err := xfer.Upgrade(w, r, nil)
	if err != nil {
		// log.Info("Upgrade:", err)
		return
	}
	defer conn.Close()

	quit := make(chan struct{})
	go func(c xfer.Websocket) {
		for { // just discard everything the browser sends
			if _, _, err := c.ReadMessage(); err != nil {
				if !xfer.IsExpectedWSCloseError(err) {
					log.Println("err:", err)
				}
				close(quit)
				break
			}
		}
	}(conn)

	var (
		previousTopo detailed.NodeSummaries
		tick         = time.Tick(loop)
		wait         = make(chan struct{}, 1)
		topologyID   = mux.Vars(r)["topology"]
	)
	rep.WaitOn(ctx, wait)
	defer rep.UnWait(ctx, wait)

	for {
		report, err := rep.Report(ctx)
		if err != nil {
			log.Errorf("Error generating report: %v", err)
			return
		}
		renderer, decorator, err := topologyRegistry.rendererForTopology(topologyID, r.Form, report)
		if err != nil {
			log.Errorf("Error generating report: %v", err)
			return
		}
		newTopo := detailed.Summaries(report, renderer.Render(report, decorator))
		diff := detailed.TopoDiff(previousTopo, newTopo)
		previousTopo = newTopo

		if err := conn.WriteJSON(diff); err != nil {
			if !xfer.IsExpectedWSCloseError(err) {
				log.Errorf("cannot serialize topology diff: %s", err)
			}
			return
		}

		select {
		case <-wait:
		case <-tick:
		case <-quit:
			return
		}
	}
}