Add health endpoint.

main.go

@@ -164,9 +164,13 @@ func main() {
 	// Handlers
 	heartbeatHandler := &routes.HeartbeatHandler{HeartbeatSrvc: heartbeatSrvc}
 	summaryHandler := &routes.SummaryHandler{SummarySrvc: summarySrvc}
+	healthHandler := &routes.HealthHandler{Db: db}
 
 	// Middlewares
-	authenticateMiddleware := &middlewares.AuthenticateMiddleware{UserSrvc: userSrvc}
+	authenticateMiddleware := &middlewares.AuthenticateMiddleware{
+		UserSrvc:       userSrvc,
+		WhitelistPaths: []string{"/api/health"},
+	}
 	basicAuthMiddleware := &middlewares.RequireBasicAuthMiddleware{}
 	corsMiddleware := cors.New(cors.Options{
 		AllowedOrigins: []string{"*"},
@@ -185,6 +189,7 @@ func main() {
 	// API Routes
 	apiRouter.Path("/heartbeat").Methods(http.MethodPost).HandlerFunc(heartbeatHandler.ApiPost)
 	apiRouter.Path("/summary").Methods(http.MethodGet).HandlerFunc(summaryHandler.ApiGet)
+	apiRouter.Path("/health").Methods(http.MethodGet).HandlerFunc(healthHandler.ApiGet)
 
 	// Static Routes
 	router.PathPrefix("/assets").Handler(negroni.Classic().With(negroni.Wrap(http.FileServer(http.Dir("./static")))))

middlewares/authenticate.go

@@ -18,9 +18,10 @@ import (
 )
 
 type AuthenticateMiddleware struct {
-	UserSrvc    *services.UserService
+	UserSrvc       *services.UserService
-	Cache       *cache.Cache
+	Cache          *cache.Cache
-	Initialized bool
+	WhitelistPaths []string
+	Initialized    bool
 }
 
 func (m *AuthenticateMiddleware) Init() {
@@ -35,6 +36,13 @@ func (m *AuthenticateMiddleware) Handle(w http.ResponseWriter, r *http.Request,
 		m.Init()
 	}
 
+	for _, p := range m.WhitelistPaths {
+		if strings.HasPrefix(r.URL.Path, p) || r.URL.Path == p {
+			next(w, r)
+			return
+		}
+	}
+
 	var user *models.User
 	var userKey string
 	user, userKey, err := m.tryGetUserByPassword(r)

routes/health.go

@@ -0,0 +1,21 @@
+package routes
+
+import (
+	"fmt"
+	"github.com/jinzhu/gorm"
+	"net/http"
+)
+
+type HealthHandler struct {
+	Db *gorm.DB
+}
+
+func (h *HealthHandler) ApiGet(w http.ResponseWriter, r *http.Request) {
+	var dbStatus int
+	if err := h.Db.DB().Ping(); err == nil {
+		dbStatus = 1
+	}
+
+	w.Header().Set("Content-Type", "text/plain")
+	w.Write([]byte(fmt.Sprintf("app=1\ndb=%d", dbStatus)))
+}