From e4bf8ea1898a8ea4afa383bb3cd9b58689745f7b Mon Sep 17 00:00:00 2001
From: Vasiliy Tolstov <v.tolstov@unistack.org>
Date: Mon, 12 Apr 2021 19:14:45 +0300
Subject: [PATCH] fix nil buf check

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
---
 proto.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/proto.go b/proto.go
index e3721e4..86b0031 100644
--- a/proto.go
+++ b/proto.go
@@ -24,7 +24,7 @@ func (c *protoCodec) Marshal(v interface{}) ([]byte, error) {
 }
 
 func (c *protoCodec) Unmarshal(d []byte, v interface{}) error {
-	if d == nil {
+	if len(d) == 0 {
 		return nil
 	}
 	switch m := v.(type) {
@@ -50,6 +50,8 @@ func (c *protoCodec) ReadBody(conn io.Reader, b interface{}) error {
 		buf, err := ioutil.ReadAll(conn)
 		if err != nil {
 			return err
+		} else if len(buf) == 0 {
+			return nil
 		}
 		m.Data = buf
 		return nil
@@ -57,7 +59,7 @@ func (c *protoCodec) ReadBody(conn io.Reader, b interface{}) error {
 		buf, err := ioutil.ReadAll(conn)
 		if err != nil {
 			return err
-		} else if buf == nil {
+		} else if len(buf) == 0 {
 			return nil
 		}
 		return proto.Unmarshal(buf, m)