funcy-4.go

...
	vals, err := parse(b)
	if err != nil {
		fmt.Println("unable to parse data sent by slack", err)
	}
	giphyTag := vals.Get("text")  
...
func parse(b []byte) (url.Values, error) {
	vals, e := url.ParseQuery(string(b))
	if e != nil {
		fmt.Println("unable to parse", e)
		return nil, e
	}
	return vals, nil
}
...