JSON decoding in golang

Question

So I tried something based on the example here in my code, and get no data, but no error either. The code is:

import ( "io" "fmt" "net/http" "encoding/json" ) type Credential struct { username string `json:"username"` password string `json:"password"` } func login(res http.ResponseWriter, req *http.Request) { if req.Method == "POST" { cred := Credential{} err := json.NewDecoder(req.Body).Decode(&cred) if err != nil { panic("can't decode") } fmt.Println("credentials: " + cred.username + " , " + cred.password) } }

I test with

curl -X POST -H "Accept: application/json" --data "{\"username\":\"x\",\"password\":\"y\"}" 127.0.0.1:8000/login -i

And the server prints out:

credentials: ,

Why is there nothing in cred.username and cred.password?

Probably not related, but it's always a good idea to supply content type in the header as well with -H "Content-Type: application/json". — kichik
– kichik, Commented Jun 18, 2015 at 0:49

Jiang YD · Accepted Answer · 2015-06-18 01:00:22Z

4

golang use first character of the field to declare public or private for that struct. so change username to Username

answered Jun 18, 2015 at 1:00

Jiang YD

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