如何在服务级别的WCF中记录JSON响应

Question

我有一个WCF服务，它向客户端返回JSON。

这是app.config

  <system.serviceModel>
<services>
  <service name="MyServices.MyService">
    <endpoint address="" behaviorConfiguration="JsonBehavior" binding="webHttpBinding"
      contract="Myervices.IMyervice">
      <identity>
        <dns value="localhost" />
      </identity>
    </endpoint>
    <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
    <host>
      <baseAddresses>
        <add baseAddress="http://localhost:8732/Design_Time_Addresses/MyEmulator/Service1/" />
      </baseAddresses>
    </host>
  </service>
</services>
<behaviors>
  <serviceBehaviors>
    <behavior>
      <serviceMetadata httpGetEnabled="True"/>
      <serviceDebug includeExceptionDetailInFaults="True"/>
    </behavior>
  </serviceBehaviors>
  <endpointBehaviors>
    <behavior name="JsonBehavior">
      <webHttp />
    </behavior>
  </endpointBehaviors>
</behaviors>

这是服务

公开的一个示例操作。

 [OperationContract]
    [WebInvoke(BodyStyle = WebMessageBodyStyle.Bare, ResponseFormat = WebMessageFormat.Json, Method = "GET", UriTemplate = "me/{id}")]
    JsonObject GetObject(string id, string connection_type);

现在，我想记录服务从客户端接收到的每个请求和正在发送回客户端的响应…

我已经创建了一个自定义MessageInspector，如下所示

public class MyMessageInspector : IDispatchMessageInspector
{
    private bool LoggingEnabled;
    #region IDispatchMessageInspector Members
    public object AfterReceiveRequest(ref System.ServiceModel.Channels.Message request, System.ServiceModel.IClientChannel channel, System.ServiceModel.InstanceContext instanceContext)
    {
        Guid correlationState = Guid.NewGuid();
        if (this.LoggingEnabled)
        {
            StringBuilder message = new StringBuilder();
            message.AppendFormat("CorrelationState = {0}{1}", correlationState, Environment.NewLine);
            message.AppendFormat("Local Address = {0}{1}", channel.LocalAddress, Environment.NewLine);
            message.AppendFormat("Remote Address = {0}{1}", channel.RemoteAddress, Environment.NewLine);
            message.AppendLine("Request");
            message.AppendLine(request.ToString());
            message.AppendLine();
            this.logger.LogMessage(message.ToString());
        }
        return correlationState;
    }
    public void BeforeSendReply(ref System.ServiceModel.Channels.Message reply, object correlationState)
    {
        if (this.LoggingEnabled)
        {
            StringBuilder message = new StringBuilder();
            message.AppendFormat("CorrelationState = {0}{1}", correlationState, Environment.NewLine);
            message.AppendLine("Reply");
            message.AppendLine(reply.ToString());
            message.AppendLine();
            this.logger.LogMessage(message.ToString());
        }
    }
    #endregion
}

但这似乎没有记录任何响应…response.Tostring()只表示"…stream"

如果我的服务以SOAP XML格式返回数据，

上述工作，但我希望它记录JSON响应，这是当我调用REST服务端点时在浏览器中下载的*.js文件中的文本。例:http://localhost: 8080/MyService/我/2/

你知道我该怎么做吗?

Answer 1

这段代码提供了一种处理REST消息的机制，并且作为奖励允许SOAP正常通过。这有点侵入性(流通过读取被破坏，所以代码需要重新生成它)，但我还没有找到任何更好的方法。

http://code.msdn.microsoft.com/WCF-REST-Message-Inspector-c4b6790b