Fix: Do not check latest release for Prometheus statistics (#522)

internal/prometheus/metrics.go

@@ -108,7 +108,7 @@ func InitMetrics() {
 
 // UpdateMetrics updates all metrics with current values
 func UpdateMetrics() {
-	info := stats.Load()
+	info := stats.Load(false)
 
 	totalMessages.Set(float64(info.Messages))
 	unreadMessages.Set(float64(info.Unread))

internal/stats/stats.go

@@ -81,7 +81,7 @@ func getBackoff(errCount int) time.Duration {
 }
 
 // Load the current statistics
-func Load() AppInformation {
+func Load(detectLatestVersion bool) AppInformation {
 	info := AppInformation{}
 	info.Version = config.Version
 
@@ -98,7 +98,7 @@ func Load() AppInformation {
 
 	if config.DisableVersionCheck {
 		info.LatestVersion = "disabled"
-	} else {
+	} else if detectLatestVersion {
 		mu.RLock()
 		cacheValid := time.Now().Before(vCache.expiry)
 		cacheValue := vCache.value

server/apiv1/application.go

@@ -28,7 +28,7 @@ func AppInfo(w http.ResponseWriter, _ *http.Request) {
 	//		400: ErrorResponse
 
 	w.Header().Add("Content-Type", "application/json")
-	if err := json.NewEncoder(w).Encode(stats.Load()); err != nil {
+	if err := json.NewEncoder(w).Encode(stats.Load(true)); err != nil {
 		httpError(w, err.Error())
 	}
 }