func handler(w http.ResponseWriter, r *http.Request) {
fmt.Printf("this is r.Body: %+v \n", r.Body)
var person Person
body, err := ioutil.ReadAll(r.Body)
if err != nil {
panic(err)
}
if err := json.Unmarshal(body, &person); err != nil {
panic(err)
}
fmt.Println("this is person:", person)
w.Header().Set("Content-Type", "application/json; charset=UTF-8")
w.WriterHeader(http.StatusOK)
if err := json.NewEncoder(w).Encode(person); err != nil {
panic(err)
}
}