A tour of Go #58( http://go-tour-jp.appspot.com/#58 )

gotour_58.go

package main

import (
	"encoding/json"
	"fmt"
	"net/http"
)

type String string

func (s String) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	// 標準出力のみ
	fmt.Println(s)
}

type Struct struct {
	Greeting string
	Punct    string
	Who      string
}

func (s Struct) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	// jsonを返す
	js, err := json.Marshal(s)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
	w.Header().Set("Content-Type", "application/json")
	w.Write(js)
}

func main() {
	// your http.Handle calls here
	http.Handle("/string", String("I'm a frayed knot."))
	http.Handle("/struct", &Struct{"Hello", ":", "Gophers!"})
	http.ListenAndServe("localhost:4000", nil)
}