如何在服务级别的WCF中记录JSON响应 [英] how to log JSON response in WCF at service level

问题描述

我有一个WCF服务，可将JSON返回给客户端.

I have a WCF service that returns JSON to the clients.

这是app.config

This is the 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>

这是该服务公开的示例操作

This is a sample opertaion exposed by the service

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

现在，我想记录该服务从客户端收到的每个请求以及正在发送回客户端的响应...在这种情况下，它是JSOn.

Now, I would like to log every request that the service receives from clients and response that is being sent back to clients...in this case it sin JSOn.

我已经如下创建了一个自定义MessageInspector

I have create a custom MessageInspector as follows

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
}

但是，这似乎并没有记录任何响应..response.Tostring()仅显示"... stream"

But this doesnt seem to log any of the resposne.. the response.Tostring() only says "...stream"

如果我的服务以SOAP XML格式返回数据，则上述方法适用..但我希望它记录JSON响应，即当我调用REST服务端点时在浏览器中下载的* .js文件中的文本.例如: http://localhost:8080/MyService/me/2/

the Above works if my service returns data in SOAP XML format..but i want it to log JSON response which is the text inside the *.js file downloaded in the browser when i call the REST service endpoint. ex: http://localhost:8080/MyService/me/2/

有什么想法可以实现这一目标吗?

any ideas how I can achieve this?

推荐答案

此代码提供了一种用于处理REST消息的机制，此外，它还允许SOAP正常通过.有点麻烦(读取会破坏流，因此代码需要重新生成)，但我还没有找到更好的方法.

This code provides a mechanism for working with REST messages, and as a bonus allows SOAP to pass through as normal. It's a little intrusive (the stream is destroyed by reading so the code needs to regenerate it) but I haven't found any better way.

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

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