decodeing http message to xml wrapped into function

inMsg.go

 	xml.Unmarshal([]byte(s), &r)
 	return r.Event
 }
+
+func decryptToXML(raw string) string {
+	e := ReadEncryptedMsg(raw)
+	sd := Decode(e.Encrypt)
+	return sd
+}

outMsg_test.go

 func TestBuildTxtMsg(t *testing.T) {
 	SetupConfig()
 	s, _ := BuildTextMsg("你好", "oUN420bxqFqlx0ZQHciUOesZO3PE")
-	e := ReadEncryptedMsg(s)
-	sd := Decode(e.Encrypt)
+	sd := decryptToXML(s)
 	h := ReadCommonHeader(sd)
 	m := ReadTextMsg(sd)
 	AssertEqual(t, m.Content, "你好", "Message content => wrong")

server.go

 
 	switch r.Method {
 	case "POST":
-		answerWechatPostEcho(w, r)
-		//answerWechatPost(w, r)
+		//answerWechatPostEcho(w, r)
+		answerWechatPost(w, r)
 	case "GET":
 		answerInitialAuth(w, r)
 	default:
 //
 func answerWechatPost(w http.ResponseWriter, r *http.Request) {
 	body, _ := ioutil.ReadAll(r.Body)
-	//fmt.Printf("get body: %s", string(body))
-	s := ReadEncryptedMsg(string(body))
-	//fmt.Printf("to decrypt %s", s.Encrypt)
-	d := Decode(s.Encrypt)
-	fmt.Printf("decrypt as: %s", d)
+	d := decryptToXML(string(body))
+	fmt.Printf("decrypt as: %s\n", d)
 	h := ReadCommonHeader(d)
 	reply, _ := BuildTextMsg(h.MsgType, h.FromUserName)
 	if h.MsgType == "voice" {