func msgHandleLink(answer chan []byte, msg *weixin.MessageReceiveLink) {
from := msg.ToUserName
to := msg.FromUserName
a := weixin.MessageCreateText(from, to, "讨厌啦，人家还没学会呢～")
x, _ := xml.Marshal(a)
answer <- x
return
}
func msgHandleText(answer chan []byte, msg *weixin.MessageReceiveText) {
from := msg.ToUserName
to := msg.FromUserName
a := weixin.MessageCreateText(from, to, "Hello 世界")
x, _ := xml.Marshal(a)
fmt.Printf("%s\n", string(x))
answer <- x
return
}