Using Golang json.NewDecoder / json.NewEncoder - json

Question

I'm a total noob at go and I'm trying to understand what I'm missing here. I'm expecting to use dec.Decode to loop over the json values and end up with a map of the response. What I'm getting is the entire json string as the key to the first element of the map. What am I missing?
Example response:
2015/03/02 10:03:16 map[error:invalid_request error_description:that is not a recognized WePay API call error_code:1001] map[string]interface {}
package main
import (
"encoding/json"
"io"
"log"
"net/http"
"reflect"
)
func main() {
var v map[string]interface{}
resp, err := http.Get("https://wepayapi.com/v2/")
if err != nil {
log.Println("Error: " + err.Error())
}
defer resp.Body.Close()
// resp.Body is an io.ReadCloser... NewDecoder expects an io.Reader
dec := json.NewDecoder(resp.Body)
// Decode reads the next JSON-encoded value from its input and stores it in the value pointed to by v.
for err := dec.Decode(&v); err != nil && err != io.EOF; {
log.Println("ERROR: " + err.Error())
return
}
log.Println(v, reflect.TypeOf(v))
}

Answer 1

Decoder will decode the whole JSON value at once (in this case the error object), you don;y have to call it in a loop:
if err := dec.Decode(&v); err != nil {
log.Println("ERROR: " + err.Error())
return
}
As a response you get a map equavalent of this JSON:
{"error":"invalid_request","error_description":"that is not a recognized WePay API call","error_code":1001}
Result:
map[string]interface{} {
"error":"invalid_request",
"error_description":"that is not a recognized WePay API call",
"error_code":1001,
}