Application_Error to handle document passthrough

gistfile1.cs

protected void Application_Error()
{
    //Sitefinity Logger should send to raygun now
    var exception = Server.GetLastError();

    //Send document requests over to login
    if(exception.Message.Contains("You are not authorized to 'View document'") || exception.Message.Contains("You are not authorized to 'View image'")){
        if (!ClaimsManager.GetCurrentIdentity().IsAuthenticated)
        {
            //If user is anonymous, send them to the login
            var defaultUrl = Config.Get<ProjectConfig>().DefaultSite.FrontEndLoginPageUrl;
            
            //Clear errors
            HttpContext.Current.ClearError();
            
            //Send the user to your loginpage
            Response.Redirect("{0}?ReturnUrl=/Download.aspx%3ffile={1}".Arrange(defaultUrl, HttpContext.Current.Request.Url.AbsoluteUri.Replace("?", "%3f")));
        }
    }
    
    //Other error processing like Raygun.io or whatever...
}