CODEWITHSUNDEEP
jsongo
irregular
irregular

Reputation: 1587

Why doesn't this JSON decode into my struct?

I am sending this kind of array after calling JSON.stringify on it

{
  "世": 1,
  "界": 1,
  "最": 1,
  "強": 1
}

but am having trouble using json.NewDecoder.Decode on it, is my struct wrong? 

type text struct {
    Text map[string]int
}

I am also having trouble sending that data back to the front end, how do I convert my data back to []byte or is there another method available to send json back to front end?

func PostHandler(w http.ResponseWriter, r *http.Request){
    log.Println("post start")
    if r.Method != "POST" {
        log.Println("in post but early return")
        http.NotFound(w, r)
        return
    }

    decoder := json.NewDecoder(r.Body)
    var t text
    err := decoder.Decode(&t)
    if err != nil {
        log.Println("I tried")
        log.Println(r.Body)
    }
    log.Println(t.Text)
    //w.Write([]byte(t.Text))     //throws conversion error
}

(I am trying to send data back and forth between front and back end to get the basics down before moving on and expanding)

Also what's printed from the log is

post start
map[]

Upvotes: 1

Views: 187

Answers (1)

Thundercat
Thundercat

Reputation: 121129

Decode the JSON value directly to a map[string]int. The map corresponds to the one object in the JSON value.

decoder := json.NewDecoder(r.Body)
var t map[string]int
err := decoder.Decode(&t)
if err != nil {
    log.Println("I tried")
    log.Println(r.Body)
}
log.Println(t)

similar playground example

Upvotes: 3

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