From 1b3122dd35c23a4cc4dbd86be842f3b97d93ff48 Mon Sep 17 00:00:00 2001
From: Simon Zolin <s.zolin@adguard.com>
Date: Tue, 12 Nov 2019 18:26:45 +0300
Subject: [PATCH] * /control/set_upstreams_config: allow empty upstream list

---
 dnsforward/dnsforward_http.go | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/dnsforward/dnsforward_http.go b/dnsforward/dnsforward_http.go
index a2660b81..25a2aae3 100644
--- a/dnsforward/dnsforward_http.go
+++ b/dnsforward/dnsforward_http.go
@@ -146,10 +146,12 @@ func (s *Server) handleSetUpstreamConfig(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
-	err = ValidateUpstreams(req.Upstreams)
-	if err != nil {
-		httpError(r, w, http.StatusBadRequest, "wrong upstreams specification: %s", err)
-		return
+	if len(req.Upstreams) != 0 {
+		err = ValidateUpstreams(req.Upstreams)
+		if err != nil {
+			httpError(r, w, http.StatusBadRequest, "wrong upstreams specification: %s", err)
+			return
+		}
 	}
 
 	newconf := FilteringConfig{}