package main import ( "encoding/json" "fmt" "os" ) type Person struct { Name string } func main() { p := &Person{Name: "World"} json.NewDecoder(os.Stdin).Decode(p) mapD := map[string]string{ "message": fmt.Sprintf("Hello %s", p.Name), "posts": "http://localhost:8080/r/blog/posts", } mapB, _ := json.Marshal(mapD) fmt.Println(string(mapB)) }