Go - Json Encoder

package main

import (

"encoding/json"

"fmt"

"net/http"

)

type Response struct{

Code int `json:"Code"`

Body interface{} `json:"Body"` //"interface{}" = anyType

}

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

//documentwrite

w.Write([]byte("<h1>Hello server</h1>")) //utf-8

fmt.Println(r.Method)//curl -X POST localhost:3000

if r.Method == http.MethodGet{

data := Response{

Code: http.StatusOK,

Body: "hi",

}

json.NewEncoder(w).Encode(data)

}

}

func main(){

//Mux

mux := http.NewServeMux()

//request , callback

mux.HandleFunc("/",handler)//指定該路徑(router)"/", registers此路徑func

//resume

http.ListenAndServe("localhost:3000",mux)

}