asp.net-mvc - 您如何返回自定义 503 消息？

Question

我有一个在 MVC4/ASP.NET Web Api 中实现的服务。当系统停机维护时，我想向我的客户返回一条自定义 503 消息。

我有以下代码:

    public class ServiceController : ApiController
    {
        public HttpResponseMessage<ServiceUnavailableModel> Get()
        {
            return new HttpResponseMessage<ServiceUnavailableModel>(new ServiceUnavailableModel(), HttpStatusCode.ServiceUnavailable);
        }
    }

我的模型看起来像这样:

    [Serializable]
    public class ServiceUnavailableModel : ISerializable
    {
        public ServiceUnavailableModel()
        {
            this.Message = Resources.SDE_SERVICE_UNAVAILABLE;
            this.Detail = Resources.SDE_SERVICE_REQUESTED_CURRENTLY;
            this.Code = (int)System.Net.HttpStatusCode.ServiceUnavailable;
        }

        public string Message { get; set; }
        public string Detail { get; set; }
        public int Code { get; set; }

        public virtual void GetObjectData(SerializationInfo info, StreamingContext context)
        {
            info.AddValue("Message", this.Message);
            info.AddValue("Detail", this.Detail);
            info.AddValue("Code", this.Code);
        }

    }

这正是我当前的一些 API 客户所期望的。但是，当我执行此操作时，得到以下结果:

HTTP/1.1 503 Service Unavailable
Cache-Control: no-cache
Pragma: no-cache
Content-Type: text/html
Expires: -1
Server: Microsoft-IIS/7.5
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Mon, 14 May 2012 20:22:39 GMT
Content-Length: 200

The service is unavailable.The service you requested is currently
unavailable or undergoing maintenance. We will have the service back
up and running shortly. Thank you for your patience.","Code":503}

请注意我的响应似乎是部分序列化的。是什么赋予了？

附注。我试过 Response.Clear() 和 Response.ClearContent() - 没有运气

Answer 1

事实证明，您必须配置 http 错误才能通过:

<configuration>
  <system.webServer>
    <httpErrors existingResponse="PassThrough"/>
  </system.webServer>
<configuration>