re-use r.URL.Query

request/query.go

@@ -19,13 +19,13 @@ type Number interface {
 // NumberParam from request query string
 func NumberParam[T Number](r *http.Request, key string) (T, error) {
 	var noop T
-	if !r.URL.Query().Has(key) {
+	q := r.URL.Query()
+	if !q.Has(key) {
 		return noop, fmt.Errorf("query param: %q is missing", key)
 	}
 
-	p := r.URL.Query().Get(key)
-	t := reflect.TypeOf(noop)
-	k := t.Kind()
+	p := q.Get(key)
+	k := reflect.TypeOf(noop).Kind()
 	// float param
 	if k == reflect.Float32 || k == reflect.Float64 {
 		n, err := strconv.ParseFloat(p, 64)