http requestしたらheaderをjsonで返してくれるやつ

parrot.go

package main

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

func rootHandler(w http.ResponseWriter, r *http.Request, cache bool) {

	type Response struct {
		Status string `json:"status"`
		Data   string `json:"data"`
	}

	headers := r.Header
	headers["Host"] = []string{r.Host}
	json, _ := json.Marshal(r.Header)

	w.Header().Set("Content-Type", "application/json; charset=utf-8")
	if cache {
		w.Header().Set("Cache-Control", "max-age=2592000")
	} else {
		w.Header().Set("Cache-Control", "no-cache")
	}

	w.WriteHeader(200)
	w.Write(json)

	log.Print("get request")
}

func cacheHandler(w http.ResponseWriter, r *http.Request) {
	rootHandler(w, r, true)
	log.Print("cached")
}

func nocacheHandler(w http.ResponseWriter, r *http.Request) {
	rootHandler(w, r, false)
	log.Print("not cached")
}

func main() {
	http.HandleFunc("/cache", cacheHandler)
	http.HandleFunc("/nocache", nocacheHandler)
	http.HandleFunc("/non", nocacheHandler)
	log.Fatal(http.ListenAndServe("localhost:30000", nil))
}