package main

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

type User struct {
	Name  string `json:"name"`
	Email string `json:"email"`
}

func users(w http.ResponseWriter, r *http.Request) {
	var input User
	dec := json.NewDecoder(http.MaxBytesReader(w, r.Body, 1<<20))
	dec.DisallowUnknownFields()
	if err := dec.Decode(&input); err != nil || strings.TrimSpace(input.Name) == "" {
		http.Error(w, "invalid JSON", http.StatusBadRequest)
		return
	}
	w.Header().Set("Content-Type", "application/json")
	json.NewEncoder(w).Encode(input)
}
func main() { http.HandleFunc("/users", users); http.ListenAndServe("127.0.0.1:8080", nil) }