Question

我在MVC4 / ASP.NET Web Api中实现了一项服务。当系统停机进行维护时，我想向客户端返回自定义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);
        }

    }

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

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}

请注意我的回复是如何部分序列化的。是什么给了什么？

PS。我已经尝试过Response.Clear（）和Response.ClearContent（） - 没有运气

Answer 1

事实证明你必须配置http错误才能通过：

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

Answer 2

在Global.asax中注册Application_Error事件并捕获response.statuscode，如果它是503，则在控制器中返回正确的消息

请在以下帖子中查看我的回答

Spring MVC 3: How to provide dynamic content to error page for HTTP 404 errors?

如何返回自定义503消息？

2 个答案: