IE6-8 unable to download file from HTTPS site

Question

I have an MVC .Net application that has actions that return report files, usually .xslx:

byte[] data = GetReport();
return File(data, 
    \"applica         


        

Answer 1

I've come up with a workaround, but it's a definite hack - this is a new cache attribute to replace the built-in [OutputCache] one:

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, Inherited = true, AllowMultiple = false)]
public sealed class IENoCacheAttribute : ActionFilterAttribute
{
    public override void OnResultExecuting(ResultExecutingContext filterContext)
    {
        if (filterContext.HttpContext.Request.IsSecureConnection &&
            string.Equals(filterContext.HttpContext.Request.Browser.Browser, "IE", StringComparison.OrdinalIgnoreCase) &&
            filterContext.HttpContext.Request.Browser.MajorVersion < 9)
        {
            filterContext.HttpContext.Response.ClearHeaders();
            filterContext.HttpContext.Response.AddHeader("cache-control", "no-store, no-cache, must-revalidate");
        }
        else
        {
            filterContext.HttpContext.Response.Cache.SetNoStore();
            filterContext.HttpContext.Response.Cache.SetCacheability(HttpCacheability.NoCache);
            filterContext.HttpContext.Response.Cache.SetRevalidation(HttpCacheRevalidation.AllCaches);
        }

        base.OnResultExecuting(filterContext);
    }
}

It's a workaround at best though - what I really want is to extend the existing [OutputCache] and Response.Cache structures so that they have the desired output suitable for legacy IEs.