From fdf608904dc45ec323b77d71dcccdbedba7f7f51 Mon Sep 17 00:00:00 2001
From: Andrey Meshkov <am@adguard.com>
Date: Fri, 10 Jul 2020 22:20:30 +0300
Subject: [PATCH] Fix version check when req body is empty

---
 home/control_update.go | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/home/control_update.go b/home/control_update.go
index 80ade843..d734f4d1 100644
--- a/home/control_update.go
+++ b/home/control_update.go
@@ -45,10 +45,13 @@ func handleGetVersionJSON(w http.ResponseWriter, r *http.Request) {
 	}
 
 	req := getVersionJSONRequest{}
-	err := json.NewDecoder(r.Body).Decode(&req)
-	if err != nil {
-		httpError(w, http.StatusBadRequest, "JSON parse: %s", err)
-		return
+	var err error
+	if r.ContentLength != 0 {
+		err = json.NewDecoder(r.Body).Decode(&req)
+		if err != nil {
+			httpError(w, http.StatusBadRequest, "JSON parse: %s", err)
+			return
+		}
 	}
 
 	now := time.Now()