diff --git a/protocol/json/server_request.go b/protocol/json/server_request.go
index 3817245..d23e716 100644
--- a/protocol/json/server_request.go
+++ b/protocol/json/server_request.go
@@ -2,6 +2,7 @@ package json
 
 import (
 	"encoding/json"
+	"strings"
 
 	"git.loafle.net/commons/rpc-go/protocol"
 	cuej "git.loafle.net/commons/util-go/encoding/json"
@@ -130,9 +131,10 @@ func (src *ServerRequestCodec) NewResponse(reply interface{}, err error) ([]byte
 func (src *ServerRequestCodec) NewResponseWithString(reply string, err error) ([]byte, error) {
 	res := src.newServerResponse(nil, err)
 
-	if "" != reply {
+	r := strings.TrimSpace(reply)
+	if "" != r {
 		var i interface{}
-		mErr := json.Unmarshal([]byte(reply), &i)
+		mErr := json.Unmarshal([]byte(r), &i)
 		if nil != mErr {
 			return nil, mErr
 		}