try to reply a link see if it auto convert. answer is ..no.

server.go

@@ -59,6 +59,9 @@ func answerWechatPost(w http.ResponseWriter, r *http.Request) {
 	fmt.Printf("decrypt as: %s\n", d)
 	h := ReadCommonHeader(d)
 	reply, _ := BuildTextMsg(h.MsgType, h.FromUserName)
+	if h.MsgType == "text" {
+		reply, _ = BuildTextMsg("http://www.hitxy.org.au/", h.FromUserName)
+	}
 	if h.MsgType == "voice" {
 		a := ReadVoiceMsg(d)
 		reply, _ = BuildTextMsg(a.Recognition, h.FromUserName)