Gorilla Mux return JSON payload

gorilla-mux-json

package main

import (
	"log"
	"net/http"

	"github.com/bitly/go-simplejson"
	"github.com/gorilla/mux"
)

func main() {

	router := mux.NewRouter()
	router.HandleFunc("/", GetRoot).Methods("GET")

	http.Handle("/", router)

	log.Println("Listening on :3000")
	log.Fatal(http.ListenAndServe(":3000", nil))
}

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

	json := simplejson.New()
	json.Set("foo", "bar")

	payload, err := json.MarshalJSON()
	if err != nil {
		log.Println(err)
	}

	w.Header().Set("Content-Type", "application/json")
	w.Write(payload)
}