使用POSTMAN访问FormValue Golang中的POST请求值

Question

I have no idea why I always receive an empty string when sending values in POSTMAN

func main(){
     rtr := mux.NewRouter()
     rtr.HandleFunc("/search", search).Methods("POST")
}
func search(w http.ResponseWriter, r *http.Request) {
     name := r.FormValue("name") //returns empty 

}

This is the body request in POSTMAN

screenshot for the body request

{
   "name": "markus"


}

I tried to change the body request to form data

Screenshot for form data in post request

But it still didn't work.

Does anyone have a solution?

Thanks

Answer 1

What you have there is not a FormValue but a JSON body. If your JSON object is just a simple map of string to string, then you can do something like this:

func search(w http.ResponseWriter, r *http.Request) {

    body, _ := ioutil.ReadAll(r.Body) // check for errors

    keyVal := make(map[string]string)
    json.Unmarshal(body, &keyVal) // check for errors

    name := keyVal["name"]

    // do whatever with name

}

Edit

If you need to parse a form value you need to call ParseForm()

func search(w http.ResponseWriter, r *http.Request) {

    err := r.ParseForm()
    if err != nil {
        // handle err
    }

    name := r.FormValue("name")

}