MessageInspector – WCF

Actually I got one assignment from current job that when client call the service, I want to add some object that I can use at service side.

 

So basically, I want to try to display the SOAP message sent to the service host. In order to do this, you might want to pay attention to 3 things:

· System.ServiceModel.Configuration.BehaviorExtensionElement

· System.ServiceModel.Description.IEndpointBehavior

· System.ServiceModel.Dispatcher.IClientMessageInspector

 

You can fine code here : http://cid-39f476822b8257be.skydrive.live.com/self.aspx/.Public/WCF^_Demo/MitWCFDay1.zip

Here is the service…

Code Snippet

1. using System;
2. using System.Collections.Generic;
3. using System.Linq;
4. using System.Text;
5. using System.ServiceModel;
6. using MitWCFDay2;
8. namespace MitWCFDay1
9. {
10.     [ServiceContract]
11.     [MyMessageInspector]
12.     public interface ICalcMath
13.     {
14.         [OperationContract]
15.         int AddNumber(int i, int j);
16.     }
18.     public class CalcMath : ICalcMath
19.     {
22.         #region ICalcMath Members
24.         public int AddNumber(int i, int j)
25.         {
26.             return i + j;
27.         }
29.         #endregion
30.     }
31. }

If you observe carefully then one  MyMessageInspector attribute is define to service. I’ll explain that later.

 

Now We have to create MyMessageInspector class  and code is following…

Code Snippet

1. using System;
2. using System.Collections.Generic;
3. using System.Linq;
4. using System.Text;
5. using System.ServiceModel.Channels;
6. using System.ServiceModel;
7. using System.ServiceModel.Description;
8. using System.ServiceModel.Dispatcher;
9. using System.ServiceModel.Configuration;
11. namespace MitWCFDay1
12. {
13.     class MyMessageInspector : Attribute, IClientMessageInspector, System.ServiceModel.Description.IEndpointBehavior
14.     {
16.         #region IClientMessageInspector Members
19.         public void AfterReceiveReply(ref Message reply, object correlationState)
20.         {   // Ignore
22.         }
25.         public object BeforeSendRequest(ref Message request, IClientChannel channel)
26.         {
28.             Console.WriteLine(request.ToString());
30.            
31.             return null;
33.         }
36.         #endregion
38.          #region IEndpointBehavior Members
41.         public void AddBindingParameters(ServiceEndpoint endpoint, System.ServiceModel.Channels.BindingParameterCollection bindingParameters)
42.         { // Ignore
44.         }
47.         public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
48.         {
50.             clientRuntime.MessageInspectors.Add(new MyMessageInspector());
52.         }
55.         public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
56.         { // Ignore
58.         }
61.         public void Validate(ServiceEndpoint endpoint)
62.         { // Ignore
64.         }
67.         #endregion
68.     }
70.     
71.     
73.     public class CustomBehaviorSection : BehaviorExtensionElement
74.     {
76.         public override Type BehaviorType
77.         {
79.             get { return typeof(MyMessageInspector); }
81.         }
84.         protected override object CreateBehavior()
85.         {
87.             return new MyMessageInspector();
89.         }
91.         
93.         
94.     }
97.     public class Information
98.     {
99.         public static Information CurrentInformation { get; set; }
101.         public string ComputerName { get; set; }
102.         public string UserName { get; set; }
104.         public Information(string computerName,string userName)
105.         {
106.             if (CurrentInformation == null)
107.             {
108.                 this.ComputerName = computerName;
109.                 this.UserName = userName;
110.                 CurrentInformation = this;
112.             }
113.             else
114.                 CurrentInformation = this;
115.             
117.         }
119.     }
124. }

Here MessageInspector class is responsible to set whatever client want to set.  There is other class call CustomBehaviorSection and it is derived from BehaviorExtensionElement. We have to give this BehaviorExtensionElement into app.config file.

Code Snippet

1. <?xml version=“1.0“ encoding=“utf-8“ ?>
2. <configuration>
3.   
4.   <system.serviceModel>
5.     <services>
6.       <service name=“MitWCFDay1.CalcMath“ behaviorConfiguration=“ForAuthorazation“>
7.         <endpoint address=“net.tcp://localhost:56/MyMathService“ binding=“netTcpBinding“ contract=“MitWCFDay1.ICalcMath“ bindingConfiguration=“ForSecurity“ name=“Binding1“ />
8.         <endpoint address=“http://localhost:560/MyMathService“ binding=“basicHttpBinding“ contract=“MitWCFDay1.ICalcMath“ name=“Binding2“  />
9.         <host>
10.           <baseAddresses>
11.             <add baseAddress=“net.tcp://localhost:56/MyMathService“/>
12.           </baseAddresses>
13.         </host>
14.         
15.       </service>
16.       
17.       
18.     </services>
20.     <client>
21.       <endpoint address=“net.tcp://localhost:56/MyMathService“ binding=“netTcpBinding“ contract=“MitWCFDay1.ICalcMath“ name=“Binding1“ behaviorConfiguration =“aa“ />
22.       <endpoint address=“http://localhost:560/MyMathService“ binding=“basicHttpBinding“ contract=“MitWCFDay1.ICalcMath“ name=“Binding2“ behaviorConfiguration=“aa“ />
23.     </client>
24.     <behaviors>
25.       
26.       <serviceBehaviors>
27.         <behavior  name=“ForAuthorazation“>
28.           <serviceAuthorization serviceAuthorizationManagerType=“MitWCFDay1.CalcAutoMng,MitWCFDay1“ />
29.         
30.         </behavior>
31.       </serviceBehaviors>
32.       <endpointBehaviors >
33.         <behavior name=“aa“>
34.           <CustomBehaviorSection />
35.         </behavior>
36.       </endpointBehaviors>
37.     </behaviors>
39.     <extensions>
40.       <behaviorExtensions>
41.         <add name=“CustomBehaviorSection“ type=“MitWCFDay1.CustomBehaviorSection, MitWCFDay1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null“  />
42.       </behaviorExtensions>
43.     </extensions>
44.     
45.     
46.     
47.     <bindings>
48.       <netTcpBinding>
49.         <binding name=“ForSecurity“>
50.           <security mode=“Transport“>
51.             
52.             <transport clientCredentialType=“Windows“/>
53.             
54.           </security>
55.         </binding>
56.         
57.       </netTcpBinding>
58.       
59.     </bindings>
60.     
61.     
62.   </system.serviceModel>
63. </configuration>

First we have created behaviorExtensions and after we have define that into endpointBehaviors.

now if you put break point on MessageInspector , before calling the service it will call the methods of MessageInspector  class.

Don’t forget to add the attribute on service.. other wise throw the error…

Advertisement