meh.go

package main

import (
	"fmt"
	"net/http"
)

func main() {
	http.HandleFunc("/", CreateHandler)
	http.ListenAndServe(":8000", nil)
}

func CreateHandler(rw http.ResponseWriter, req *http.Request) {
	if req.Method != "POST" {
		rw.WriteHeader(http.StatusBadRequest)
		rw.Write([]byte("KO"))
	}

	fmt.Println("Creating Lead (", http.StatusCreated, ")")
	rw.WriteHeader(http.StatusCreated)
	rw.Write([]byte("OK"))
	fmt.Println("Header Size: ", len(rw.Header()))
}