Add /chronograf/v1/ping endpoint for server status

server/mux.go

@@ -55,6 +55,8 @@ func NewMux(opts MuxOpts, service Service) http.Handler {
 	router.GET("/docs", Redoc("/swagger.json"))
 
 	/* API */
+	router.GET("/chronograf/v1/ping", service.Ping)
+
 	// Sources
 	router.GET("/chronograf/v1/sources", service.Sources)
 	router.POST("/chronograf/v1/sources", service.NewSource)

server/ping.go

@@ -0,0 +1,12 @@
+package server
+
+import "net/http"
+
+// Ping responds with HTTP status 204 (no content) and if auth is available
+// refreshes the token within the cookie.
+func (h *Service) Ping(w http.ResponseWriter, r *http.Request) {
+	w.WriteHeader(http.StatusNoContent)
+	if h.UseAuth {
+		// TODO: refresh token
+	}
+}

server/ping_test.go

@@ -0,0 +1,22 @@
+package server
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestPingStatus(t *testing.T) {
+	req := httptest.NewRequest("GET", "http://hoverboards.com", nil)
+	w := httptest.NewRecorder()
+	srv := Service{}
+	srv.Ping(w, req)
+	resp := w.Result()
+	if resp.StatusCode != http.StatusNoContent {
+		t.Errorf("TestPingStatus got status code %d want %d", resp.StatusCode, http.StatusNoContent)
+	}
+}
+
+func TestPingTokenRefresh(t *testing.T) {
+
+}