Function usageStatsHandler

cmd/tempo/app/modules.go:852–873

(urCfg usagestats.Config)

}

func usageStatsHandler(urCfg usagestats.Config) http.HandlerFunc {
	if !urCfg.Enabled {
		return func(w http.ResponseWriter, r *http.Request) {
			http.Error(w, "usage-stats is not enabled", http.StatusOK)
		}
	}

	// usage stats is Enabled, build and return usage stats json
	reportBytes, err := json.Marshal(usagestats.BuildStats())
	if err != nil {
		return func(w http.ResponseWriter, r *http.Request) {
			http.Error(w, "error building usage report", http.StatusInternalServerError)
		}
	}
	reportStr := string(reportBytes)

	return func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusOK)
		w.Header().Set("Content-Type", "application/json")
		_, _ = io.WriteString(w, reportStr)
	}
}