如何从WCF服务器代码读取WCF肥皂响应？

Question

I have looked through all of the related posts I could find on this site and I have scoured the Internet...and I am stumped about how to read a WCF's SOAP response before it sends it back to the client.

I want to read the response in its final form (with the soap envelop elements included in the XML) and send it to my custom log procedure.

Note that I have to use a custom log function provided that accepts the response as a string and sends it to a SQL db (not shown). This has to be handled by the code at runtime for each response; I can't simply use some 3rd party logging/tracer tool.

Here is my WCF service code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;
using MSADataAccess;
using System.Web.Configuration;
using System.ServiceModel.Channels;

namespace svcIDIVS
{
    public class VINS : IVINS
    {

        public string VerifyInsurance(string coverageRequest)
        {
            string responseMessage = null;
            DataAccess da = new DataAccess();
            responseMessage = da.VerifyInsurance(coverageRequest);
            return responseMessage;
        }
    }
}

I need to read responseMessage along with its SOAP Envelope into a string. It should look something like this:

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
  <s:Header />
  <s:Body>
    <VerifyInsuranceResponse xmlns="http://tempuri.org/">
      <VerifyInsuranceResult>&lt;CoverageResponseDocument PublicationVersion="00200809" PublicationDate="2008-11-05" xmlns="http://www.iicmva.com/CoverageVerification/"&gt;  
    &lt;Detail&gt;  
        &lt;PolicyInformation&gt;  
            &lt;CoverageStatus&gt;  
                &lt;ResponseDetails&gt;  
                    &lt;ResponseCode&gt;Unconfirmed&lt;/ResponseCode&gt;  
                    &lt;UnconfirmedReasonCode&gt;VIN2&lt;/UnconfirmedReasonCode&gt;  
                &lt;/ResponseDetails&gt;  
            &lt;/CoverageStatus&gt;  
            &lt;OrganizationDetails&gt;   
                &lt;NAIC&gt;14788&lt;/NAIC&gt;  
                &lt;!-- this can be echoed from the request or provide the actual NAIC that has evidence of coverage --&gt;  
            &lt;/OrganizationDetails&gt;  
            &lt;PolicyDetails&gt;  
                &lt;!-- this section can be echoed from the request --&gt;  
                &lt;VerificationDate&gt;07/16/2008 00:00:00&lt;/VerificationDate&gt;  
                &lt;PolicyKey&gt;03K85845&lt;/PolicyKey&gt;  
                &lt;PolicyState&gt;CT&lt;/PolicyState&gt;  
            &lt;/PolicyDetails&gt;  
        &lt;/PolicyInformation&gt;  
    &lt;/Detail&gt;  
&lt;/CoverageResponseDocument&gt;  
</VerifyInsuranceResult>
    </VerifyInsuranceResponse>
  </s:Body>

Answer 1

WCF has Message Dispatcher Inspector wherein you can intercept messages and validate prior to send/reply for your service.

public class BodMessageInspector : IDispatchMessageInspector
    {
        public object AfterReceiveRequest(ref Message request, IClientChannel channel, InstanceContext instanceContext)
        {
            return instanceContext;
        }

        public void BeforeSendReply(ref Message reply, object correlationState)
        {
            // DO your stuff here and validate your reply Message
        }
    }