code: func (h *HTTPBin) Cookies(w http.ResponseWriter, r *http.Request) {
  	resp := cookiesResponse{}
  	for _, c := range r.Cookies() {
  		resp[c.Name] = c.Value
  	}
  	body, _ := json.Marshal(resp)
  	writeJSON(w, body, http.StatusOK)
  }
docs: // Cookies responds with the cookies in the incoming request