From 9f3bfa10057f00d9daa7179308c49121807da715 Mon Sep 17 00:00:00 2001
From: Denis Makogon <lildee1991@gmail.com>
Date: Sat, 7 Oct 2017 01:24:43 +0300
Subject: [PATCH] Read request body and see if it's not empty then decide
 whether write it or not

---
 api/agent/protocol/json.go | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/api/agent/protocol/json.go b/api/agent/protocol/json.go
index 2beb661a7..c85672790 100644
--- a/api/agent/protocol/json.go
+++ b/api/agent/protocol/json.go
@@ -37,19 +37,19 @@ func (h *JSONProtocol) DumpJSON(w io.Writer, req *http.Request) error {
 		return err
 	}
 
-	if req.ContentLength != 0 {
+	bb := new(bytes.Buffer)
+	_, err = bb.ReadFrom(req.Body)
+	if err != nil {
+		return err
+	}
+	reqData := bb.String()
+	if reqData != "" {
 		_, err := io.WriteString(h.in, `"body": `)
 		if err != nil {
 			// this shouldn't happen
 			return err
 		}
-		bb := new(bytes.Buffer)
-		_, err = bb.ReadFrom(req.Body)
-		if err != nil {
-			return err
-		}
-
-		err = stdin.Encode(bb.String())
+		err = stdin.Encode(reqData)
 		if err != nil {
 			return err
 		}