add http body for handler recorder

recorder/recorder.go

@@ -18,11 +18,13 @@ const (
 type HTTPRequestRecorderObject struct {
 	ContentLength int64       `json:"contentLength"`
 	Header        http.Header `json:"header"`
+	Body          []byte      `json:"body"`
 }
 
 type HTTPResponseRecorderObject struct {
 	ContentLength int64       `json:"contentLength"`
 	Header        http.Header `json:"header"`
+	Body          []byte      `json:"body"`
 }
 
 type HTTPRecorderObject struct {