Mono OSX Owin Web API设置-如何设置MaxMessageSize？

using System.Net.Http;
using System.Threading;
using System.Threading.Tasks;
using System.Web.Http;

public class MaxMessageSizeHandler : DelegatingHandler
{
    private const int MaxSize = 1024 * 1024; // 设置最大消息大小为1MB

    protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
    {
        if (request.Content.Headers.ContentLength > MaxSize)
        {
            throw new HttpResponseException(HttpStatusCode.BadRequest);
        }

        var response = await base.SendAsync(request, cancellationToken);

        if (response.Content.Headers.ContentLength > MaxSize)
        {
            throw new HttpResponseException(HttpStatusCode.InternalServerError);
        }

        return response;
    }
}

public class WebApiApplication : System.Web.HttpApplication
{
    protected void Application_Start()
    {
        GlobalConfiguration.Configure(WebApiConfig.Register);

        GlobalConfiguration.Configuration.MessageHandlers.Add(new MaxMessageSizeHandler());
    }
}