I have a long time polling controller in my MVC3 project. It has its timeout set to 30 seconds. I have a HandleErrorAttribute implementation that handles logging of all errors.
Since the timout throws a TimeoutException it means these will be presented in the log.
I need to intercept this error before my HandleErrorAttribute class gets it and return a json object instead of the 500 error page. Whats the best approach for this?
I did this and it works
public class HandleTimeout : HandleErrorAttribute
{
public override void OnException(ExceptionContext filterContext)
{
if(filterContext.Exception is TimeoutException)
{
filterContext.Result = new { Timeout = true }.AsJson();
filterContext.ExceptionHandled = true;
filterContext.HttpContext.Response.StatusCode = 200;
}
base.OnException(filterContext);
}
}
Best approach?
I went with this route, the difference from my above code is that I also check if the Controller is Async, because we only want to handle Timeouts in this fashion if we are in a long time polling scenarios.
public class HandleTimeout : HandleErrorAttribute
{
public override void OnException(ExceptionContext filterContext)
{
if(filterContext.Exception is TimeoutException && filterContext.Controller is AsyncController)
{
filterContext.HttpContext.Response.StatusCode = 200;
filterContext.Result = new { Timeout = true }.AsJson();
filterContext.ExceptionHandled = true;
}
base.OnException(filterContext);
}
}