如何在Golang的Web应用程序中缓冲响应？

Question

I want to make a hello world web app that will properly catch template error. So I need to buffer the response but don't know how to do it. I've put together this code. Is this the way to buffer a response in golang?

func get_handler(w http.ResponseWriter, r *http.Request) {

    buf := new(bytes.Buffer)
    err := templates.ExecuteTemplate(buf, "hello.html", nil)
    if err != nil {
        fmt.Println(err.Error())
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }
    w.Write([]byte(buf.String()))
}

Answer 1

bytes.Buffer has a Bytes method, so you don't actually need to call String and convert it to []byte:

w.Write(buf.Bytes())

Additionally, it's a good practice to write errors to stderr. Just replace your fmt with log:

if err != nil {
    log.Println(err)
    http.Error(w, err.Error(), http.StatusInternalServerError)
    return
}