From 643b8a5b9cb95ae41ff4f9eccb196bdb13e37cb4 Mon Sep 17 00:00:00 2001
From: Mark van der Velden <mark@dynom.nl>
Date: Thu, 27 Apr 2017 20:04:51 +0200
Subject: [PATCH] Making sure that requests without `url` parameter don't
 complain about invalid domains.

---
 handlers/urlparameters.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/handlers/urlparameters.go b/handlers/urlparameters.go
index b1c712f..dadcc38 100644
--- a/handlers/urlparameters.go
+++ b/handlers/urlparameters.go
@@ -16,7 +16,7 @@ func NewValidateURLParameter(l log.Logger, allowedHosts []string) func(h http.Ha
 	return func(h http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 			queryURL := r.URL.Query().Get("url")
-			if !isValidQueryURL(queryURL, hosts) {
+			if queryURL != "" && !isValidQueryURL(queryURL, hosts) {
 				l.Log("error", "domain not registered", "QS", r.URL.RawQuery, "URL", queryURL)
 				http.Error(w, "Unregisterd domain", http.StatusNotAcceptable)
 				return