如何在服务级别在 WCF 中记录 JSON 响应

Question

我有一个 WCF 服务，它将 JSON 返回给客户端。

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以及发送回客户端的响应...在这种情况下它是 JSOn。

我创建了一个自定义 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() 只说“...stream”

如果我的服务以 SOAP XML 格式返回数据，则上述内容有效..但是我希望它记录 JSON 响应，即当我调用 REST 服务端点时在浏览器中下载的 *.js 文件内的文本。例如： http://localhost:8080/MyService/me/2/

任何想法我如何能达到这个目的吗？

Answer 1

此代码提供了一种处理 REST 消息的机制，并且作为奖励允许 SOAP 正常传递。这有点侵入性（流被读取破坏，因此代码需要重新生成它），但我还没有找到更好的方法。

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