在服务器反序列化WCF消息 [英] Deserializing WCF Message at Server

问题描述

我实现（通过IDispatchMessageInspector）的自定义消息检查拦截那些在WCF服务的服务器端收到的消息，所以我可以尝试反序列化消息并应用一些具体的业务逻辑。我现在遇到的问题是，当我写的MessageBuffer的内容到一个新的MemoryStream，然后尝试反序列化，我得到一个错误，指出在根级别的数据无效。行1，位置1 。我不知道数据传递的是跳过检查员使一切工作正常有效

I implemented a custom message inspector (via IDispatchMessageInspector) to intercept messages that are received on the server side of a WCF service so I can attempt to deserialize the message and apply some specific business logic. The problem I'm encountering is when I write the MessageBuffer's contents to a new MemoryStream and then try to deserialize, I get an error that says "The data at the root level is invalid. Line 1, position 1." I do know the data being passed in is valid as skipping over the inspector makes everything work fine.

示例代码：

public object AfterReceiveRequest(ref System.ServiceModel.Channels.Message request, System.ServiceModel.IClientChannel channel, System.ServiceModel.InstanceContext instanceContext)
    {
        MessageBuffer buffer = request.CreateBufferedCopy(Int32.MaxValue);
        request = buffer.CreateMessage();
        string msg = buffer.CreateMessage().ToString();

        var dc = new DataContractSerializer(typeof(Adder));

        using (var stream = new MemoryStream())
        {
            buffer.WriteMessage(stream);

            stream.Position = 0;

            //deserializing error occurs here
            var c = dc.ReadObject(stream);
        }

        return null;
    }

下面是加法类/接口：

    [DataContract(Name = "adder", Namespace = "http://test.com")]
public class Adder
{
    [DataMember(Name = "first")]
    public int First { get; set; }

    [DataMember(Name = "second")]
    public int Second { get; set; }
}

    [ServiceContract(Namespace = "http://test.com")]
public interface ITestSvc
{
    [OperationContract(Name = "add")]
    int Add(Adder adder);
}

任何建议或是否有这个一个更好的选择？我的主要目标是阅读上来到我的服务好每一位WCF请求XML（在反序列化对象）。

Any suggestions or is there a better option for this? My main goal is to read the XML (in a deserialized object) on every WCF request that comes into my service.

推荐答案

我最终会在邮件头的路线，像迈克帕克希尔建议。

I ended up going the message header route, like Mike Parkhill suggested.

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