some changes

env/enviroment.go

@@ -26,7 +26,11 @@ func Load(path string) error {
 }
 
 func (key EnvKey) GetValue() string {
-	return os.Getenv(string(key))
+	port := os.Getenv(string(key))
+	if port == "" {
+		port = "8080"
+	}
+	return port
 }
 
 func (key EnvKey) SetValue(value string) {

handlers/infos.go

@@ -34,20 +34,16 @@ func getActiveIP() string {
 }
 
 func InfoHandler(w http.ResponseWriter, r *http.Request) {
-	port := env.Port.GetValue()
-	if port == "" {
-		port = "8080"
-	}
-
-	speed := env.IntervalDefault.GetValue()
-	if speed == "" {
-		speed = "10"
-	}
+	w.Header().Set("Content-Type", "application/json")
 
 	data := map[string]string{
 		"ip":    GetLocalIP(),
-		"port":  port,
+		"port":  env.Port.GetValue(),
 		"speed": GetInterval(),
 	}
-	json.NewEncoder(w).Encode(data)
+	err := json.NewEncoder(w).Encode(data)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
 }