Return custom HTTP code from ActionFilterAttribute - asp.net

Question

I use the code below to throttle my ASP.NET Web Api:
public class Throttle : ActionFilterAttribute
{
public override async Task OnActionExecutingAsync(HttpActionContext context, CancellationToken cancellationToken)
{
// ...
if (throttle)
{
throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.Conflict));
}
}
}
However, I cannot return error code 429, because it's not in HttpStatusCode enum. Is there a way to return a custom error code?

Answer 1

I found this over here.
var response = new HttpResponseMessage
{
StatusCode = (HttpStatusCode)429,
ReasonPhrase = "Too Many Requests",
Content = new StringContent(string.Format(CultureInfo.InvariantCulture, "Rate limit reached. Reset in {0} seconds.", data.ResetSeconds))
};
response.Headers.Add("Retry-After", data.ResetSeconds.ToString(CultureInfo.InvariantCulture));
actionContext.Response = response;
Hope this helps

Answer 2

This is what I did based on another response on StackOverflow.
Create Class (in controller file worked for me)
public class TooManyRequests : IHttpActionResult
{
public TooManyRequests()
{
}
public TooManyRequests(string message)
{
Message = message;
}
public string Message { get; private set; }
public HttpResponseMessage Execute()
{
HttpResponseMessage response = new HttpResponseMessage((HttpStatusCode)429);
if (!string.IsNullOrEmpty(Message))
{
response.Content = new StringContent(Message); // Put the message in the response body (text/plain content).
}
return response;
}
public Task<HttpResponseMessage> ExecuteAsync(CancellationToken cancellationToken)
{
return Task.FromResult(Execute());
}
}
Use in controller
public IHttpActionResult Get()
{
// with message
return new TooManyRequests("Limited to 5 request per day. Come back tomorrow.");
// without message
// return new TooManyRequests();
}