public class CustomHandleErrorAttribute : HandleErrorAttribute
{
public override void OnException(ExceptionContext filterContext)
{
//only for system exceptions like 500 errors
//this methods redirects the user to Error.cshtml inside views/shared folder
//in this case Application_Error inside global.asa doesn't get called
var exceptionCode = new HttpException(null, filterContext.Exception).GetHttpCode();
var currentController = (string)filterContext.RouteData.Values["controller"];
var currentActionName = (string)filterContext.RouteData.Values["action"];
var exception = filterContext.Exception;
var message = exception.Message;
var innerMessage = exception.InnerException == null ? string.Empty : exception.InnerException.Message;
var isExceptionHandled = filterContext.ExceptionHandled;
var isCustomErrorEnabled = filterContext.HttpContext.IsCustomErrorEnabled;
/*
//Keep this disabled for now
if (filterContext.ExceptionHandled ||
!filterContext.HttpContext.IsCustomErrorEnabled ||
exceptionCode != 500)
{
return;
}
*/
// if the request is AJAX return JSON else view.
if (IsAjaxRequest(filterContext))
{
//Because its a exception raised after ajax invocation
//Lets return Json
filterContext.Result = new JsonResult
{
JsonRequestBehavior = JsonRequestBehavior.AllowGet,
Data = new
{
error = true,
message = filterContext.Exception.Message
}
};
}
else
{
//Normal Exception
//So let it handle by its default ways.
base.OnException(filterContext);
}
//DO YOUR ERROR LOGGING HERE
//get the web.config
var configuration = WebConfigurationManager.OpenWebConfiguration("~/Web.config");
// Get the section.
CustomErrorsSection customErrors = (CustomErrorsSection)configuration.GetSection("system.web/customErrors");
//only do this after reading error mode, otherwise, this swallows the exceptions, and you get a generic 500 IIS page,
//instead of the yellow standard asp.net error page with what the exception is and line numbers and all that good stuff.
if (((customErrors.Mode == CustomErrorsMode.RemoteOnly && HttpContext.Current.Request.IsLocal == false) == false || customErrors.Mode == CustomErrorsMode.Off) == false)
{
filterContext.ExceptionHandled = true;
filterContext.HttpContext.Response.Clear();
filterContext.HttpContext.Response.StatusCode = 500;
filterContext.HttpContext.Response.TrySkipIisCustomErrors = true;
}
}
private static bool IsAjaxRequest(ExceptionContext filterContext)
{
return filterContext.HttpContext.Request.Headers["X-Requested-With"] == "XMLHttpRequest";
}
}
