package main

import (
    "io"
    "net/http"
	"log"
)

func main() {
	http.HandleFunc("/", func(resp http.ResponseWriter, req *http.Request) {
		switch req.Method {
		case http.MethodGet:
			_, _ = resp.Write([]byte("Try POSTing data to /"))
		case http.MethodPost:
			_, _ = io.Copy(resp, req.Body)
		default:
			http.Error(resp, "", http.StatusNotFound)
		}
	})

	log.Println("Listening on http://127.0.0.1:3001")
	_ = http.ListenAndServe("127.0.0.1:3001", http.DefaultServeMux)
}