捕获响应当服务返回使用WCF一个500错误 [英] Capture response when a service returns a 500 error using WCF

问题描述

我是从第三方Web服务使用REST获取数据（使用的WebHttpBinding 和 WebHttpBehavior ）。当我在查询字符串传递一个参数无效，该服务采用了500的地位响应并介绍了该问题。响应看起来是这样的：

I'm getting data from a 3rd party web service using REST (using WebHttpBinding and WebHttpBehavior). When I pass an invalid parameter in the querystring, the service responds with a 500 status and describes the problem. The response looks something like this:

HTTP/1.1 500 Internal Server Error
Date: Tue, 14 Jun 2011 16:12:48 GMT
... more headers

<Error>Invalid integer value for ID</Error>

我真的很希望能够捕捉到该错误消息。我的WCF客户端是这样的：

I would really like to be able to capture that error message. My WCF client looks like this:

public class DataClient : ClientBase<IDataClient>, IDataClient
{
    public DataClient (string endpointAddress)
        : base(new WebHttpBinding(), new EndpointAddress(endpointAddress))
    {
        this.Endpoint.Behaviors.Add(new WebHttpBehavior());
    }

    public string GetData(string id)
    {
        // This is where the exception is thrown
        return base.Channel.GetData(id);
    }
}

当我赶上被抛出的异常，该数据是无处可寻。它只是说，System.ServiceModel.CommunicationException：内部服务器错误。

When I catch the exception that is thrown, that data is nowhere to be found. It just says, "System.ServiceModel.CommunicationException: Internal Server Error".

我试图创建一个自定义的行为，并增加了一个消息检查，但我的自定义消息检查代码没有按之前抛出的异常（它确实得到执行，如果没有异常被抛出）'T被执行。

I tried creating a custom behavior and added a message inspector, but my custom message inspector code doesn't get executed before the exception is thrown (it does get executed if no exception is thrown).

推荐答案

我终于想通出。创建自定义的行为，并添加一个消息检查是我需要做的方式。我只需要在 WebHttpBehavior 来增加我的自定义行为。然后，我可以看一下整个响应，并抛出自己的异常，并在它的所有数据！

I finally figured it out. Creating a custom behavior and adding a message inspector is the way that I needed to do it. I just needed to add my custom behavior before the WebHttpBehavior. Then I can look at the whole response and throw my own exception with all the data in it!

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