Direct proxy works

_stats/server.go

@@ -0,0 +1,40 @@
+package stats
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"go.uber.org/zap"
+
+	"github.com/9seconds/mtg/config"
+)
+
+func startServer(conf *config.Config, prometheusHandler http.Handler) {
+	log := zap.S().Named("stats")
+
+	http.HandleFunc("/", func(w http.ResponseWriter, _ *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+
+		first, err := json.Marshal(GetStats())
+		if err != nil {
+			log.Errorw("Cannot encode json", "error", err)
+			http.Error(w, "Internal server error", 500)
+			return
+		}
+
+		interim := map[string]interface{}{}
+		json.Unmarshal(first, &interim) // nolint: errcheck, gosec
+
+		encoder := json.NewEncoder(w)
+		encoder.SetEscapeHTML(false)
+		encoder.SetIndent("", "  ")
+		if err = encoder.Encode(interim); err != nil {
+			log.Errorw("Cannot encode json", "error", err)
+		}
+	})
+	http.Handle("/prometheus/", prometheusHandler)
+
+	if err := http.ListenAndServe(conf.StatAddr(), nil); err != nil {
+		log.Fatalw("Stats server has been stopped", "error", err)
+	}
+}