Add attribute list call

server/main.go

@@ -28,10 +28,14 @@ func main() {
 	e.HideBanner = true
 	e.Use(recoverMiddleware)
 
-	e.GET(`/count`, count)
+	pq := e.Group(`/pq`)
+	pq.GET(`/count`, count)
+	pq.GET(`/list`, listAttr)
 
 	for _, v := range app.GetAttributes() {
-		e.GET(`/`+strings.ToLower(v.Name)+`/:date`, getAttr(v.Index))
+		pq.GET(`/`+strings.ToLower(v.Name)+`/:date`, getAttr(v.Index))
+
+		attrs = append(attrs, strings.ToLower(v.Name))
 	}
 
 	panic(e.Start(`localhost:33333`))
@@ -41,6 +45,12 @@ func count(c echo.Context) error {
 	return c.JSON(200, app.Count())
 }
 
+var attrs []string
+
+func listAttr(c echo.Context) error {
+	return c.JSON(200, attrs)
+}
+
 func getAttr(index int) echo.HandlerFunc {
 	return func(c echo.Context) error {
 		date, err := time.Parse(time.RFC3339, c.Param(`date`))