func RegisterHandlers(mux httpMux.Mux, containerManager manager.Manager, httpAuthFile, httpAuthRealm, httpDigestFile, httpDigestRealm, prometheusEndpoint string) error {
	// Basic health handler.
	if err := healthz.RegisterHandler(mux); err != nil {
		return fmt.Errorf("failed to register healthz handler: %s", err)
	}

	// Validation/Debug handler.
	mux.HandleFunc(validate.ValidatePage, func(w http.ResponseWriter, r *http.Request) {
		err := validate.HandleRequest(w, containerManager)
		if err != nil {
			fmt.Fprintf(w, "%s", err)
		}
	})

	// Register API handler.
	if err := api.RegisterHandlers(mux, containerManager); err != nil {
		return fmt.Errorf("failed to register API handlers: %s", err)
	}

	// Redirect / to containers page.
	mux.Handle("/", http.RedirectHandler(pages.ContainersPage, http.StatusTemporaryRedirect))

	var authenticated bool = false

	// Setup the authenticator object
	if httpAuthFile != "" {
		glog.Infof("Using auth file %s", httpAuthFile)
		secrets := auth.HtpasswdFileProvider(httpAuthFile)
		authenticator := auth.NewBasicAuthenticator(httpAuthRealm, secrets)
		mux.HandleFunc(static.StaticResource, authenticator.Wrap(staticHandler))
		if err := pages.RegisterHandlersBasic(mux, containerManager, authenticator); err != nil {
			return fmt.Errorf("failed to register pages auth handlers: %s", err)
		}
		authenticated = true
	}
	if httpAuthFile == "" && httpDigestFile != "" {
		glog.Infof("Using digest file %s", httpDigestFile)
		secrets := auth.HtdigestFileProvider(httpDigestFile)
		authenticator := auth.NewDigestAuthenticator(httpDigestRealm, secrets)
		mux.HandleFunc(static.StaticResource, authenticator.Wrap(staticHandler))
		if err := pages.RegisterHandlersDigest(mux, containerManager, authenticator); err != nil {
			return fmt.Errorf("failed to register pages digest handlers: %s", err)
		}
		authenticated = true
	}

	// Change handler based on authenticator initalization
	if !authenticated {
		mux.HandleFunc(static.StaticResource, staticHandlerNoAuth)
		if err := pages.RegisterHandlersBasic(mux, containerManager, nil); err != nil {
			return fmt.Errorf("failed to register pages handlers: %s", err)
		}
	}

	collector := metrics.NewPrometheusCollector(containerManager)
	prometheus.MustRegister(collector)
	http.Handle(prometheusEndpoint, prometheus.Handler())

	return nil
}

func RegisterHandlers(mux httpMux.Mux, m manager.Manager) error {
	apiVersions := getApiVersions()
	supportedApiVersions := make(map[string]ApiVersion, len(apiVersions))
	for _, v := range apiVersions {
		supportedApiVersions[v.Version()] = v
	}

	mux.HandleFunc(apiResource, func(w http.ResponseWriter, r *http.Request) {
		err := handleRequest(supportedApiVersions, m, w, r)
		if err != nil {
			http.Error(w, err.Error(), 500)
		}
	})
	return nil
}

func RegisterHandlersBasic(mux httpmux.Mux, containerManager manager.Manager, authenticator *auth.BasicAuth) error {
	// Register the handler for the containers and docker age.
	if authenticator != nil {
		mux.HandleFunc(ContainersPage, authenticator.Wrap(containerHandler(containerManager)))
		mux.HandleFunc(DockerPage, authenticator.Wrap(dockerHandler(containerManager)))
	} else {
		mux.HandleFunc(ContainersPage, containerHandlerNoAuth(containerManager))
		mux.HandleFunc(DockerPage, dockerHandlerNoAuth(containerManager))
	}
	return nil
}

func RegisterPrometheusHandler(mux httpmux.Mux, containerManager manager.Manager, prometheusEndpoint string, containerNameToLabelsFunc metrics.ContainerNameToLabelsFunc) {
	collector := metrics.NewPrometheusCollector(containerManager, containerNameToLabelsFunc)
	prometheus.MustRegister(collector)
	mux.Handle(prometheusEndpoint, prometheus.Handler())
}

// Register simple HTTP /healthz handler to return "ok".
func RegisterHandler(mux httpMux.Mux) error {
	mux.HandleFunc("/healthz", handleHealthz)
	return nil
}