simple-server.go

package main

import (
	"fmt"
	"io/ioutil"
	"net/http"
)

func handle(w http.ResponseWriter, r *http.Request) {
	if r.URL.Path != "/" {
		http.Error(w, "404 not found.", http.StatusNotFound)
		return
	}

	switch r.Method {
	case "GET":
		fmt.Fprintf(w, "Perhaps you meant to make a POST request?\n")
	case "POST":
		b, _ := ioutil.ReadAll(r.Body)
		fmt.Println(string(b) + "\n")
		fmt.Fprintf(w, "OK\n")
	default:
		fmt.Fprintf(w, "Only GET and POST methods are supported.\n")
	}
}
func main() {
	http.HandleFunc("/", handle)
	if err := http.ListenAndServe(":8080", nil); err != nil {
		panic(err)
	}
}