Gin Changing the Render interface to accept a *http.Request

The current Render interface accepts only a http.ResponseWriter:

type Render interface {
    Render(http.ResponseWriter) error
}

I'm wondering if there's any reason the *http.Request isn't accepted along with it.

The reason for considering this change is to be able to provide default values to the templates that require access to the users cookie.

Consider flash messages or information about logged in users... It's annoying to have to populate gin.H with that information each time we call context.HTML. If the Render interface was updated to accept the *http.Request, we could easily provide our own HTMLRender to Engine and have it perform this work automatically for us.

Comment From: ljluestc

type MyHTMLRender struct {
    TemplateName string
}

func (r *MyHTMLRender) Render(w http.ResponseWriter, req *http.Request) error {
    // Access request data like cookies or session data
    userCookie, err := req.Cookie("user")
    if err != nil {
        userCookie = &http.Cookie{Name: "user", Value: "guest"}
    }

    // Define a context for template rendering
    data := gin.H{
        "user": userCookie.Value,
    }

    // Render the template with gin's context
    tmpl := template.Must(template.New(r.TemplateName).ParseFiles(r.TemplateName))
    return tmpl.Execute(w, data)
}