Avoid persisting data while refreshing

Question

I am recording a history log of accessed options while doing refresh on the page it is duplicating the data. How do I persist only on the request?

Answer 1

Regardless of the language the solution of the issue to be solved only with information from request sent by the browser. In this case we will use the chrome and firefox, as they both add a new header when the user gives a refresh or F5, that header is the Cache-Control with a value of max-age 0.

Implementation in ASP.NET MVC

public ActionResult Index()
{
    var cacheControl = Request.Headers["Cache-Control"];

    if (cacheControl != null) // opcional o `Equals("max-age=0")`
    {
        // "É refresh"
    } else {
        // Pode salvar o log
    }
    // restante do código
}

The internet explorer adds a parameter in the request depending on the version, will you see which you want to cover and adapt this solution.