Wcf rest post inspector URL redirect

Question

Wcf rest post inspector URL redirect

I'm having trouble implementing URL redirection using message inspectors for my WCF REST service. The idea is to implement AfterReceiveRequest, to change the incoming request so that you don’t do anything effectively, and then call BeforeSendReply another URI that provides the actual service. You can think of this scenario as that we don’t want to break clients, therefore they continue to use old URIs for calls, but internally redirect them to other URIs.

For example, this is my service contract as follows:

[ServiceContract]
public interface IService1
{
    [OperationContract]
    [WebGet(UriTemplate = "person/{person}")]
    string GreetMe(string person);

    [OperationContract]
    [WebGet(UriTemplate = "donothing")]
    string DoNothing();
}

And this is the implementation:

public class Service1 : IService1
{
    public string GreetMe(string person)
    {
        return string.Format("Hi {0}", person);
    }

    public string DoNothing()
    {
        return string.Empty;
    }
}

Then I add the MessageInspector to the behavior of the endpoint. AfterReceiveRequest of this inspector is as follows:

        public object AfterReceiveRequest(ref Message request, IClientChannel channel, InstanceContext instanceContext)
        {
            OperationContext operationContext = OperationContext.Current;

            if (WebOperationContext.Current != null && WebOperationContext.Current.IncomingRequest.UriTemplateMatch != null)
            {
                UriBuilder baseUriBuilder = new UriBuilder(WebOperationContext.Current.IncomingRequest.UriTemplateMatch.BaseUri);
                UriBuilder requestUriBuilder = new UriBuilder(WebOperationContext.Current.IncomingRequest.UriTemplateMatch.RequestUri);

                OperationContext.Current.IncomingMessageProperties["MicrosoftDataServicesRootUri"] = baseUriBuilder.Uri.ToString();
                OperationContext.Current.IncomingMessageProperties["MicrosoftDataServicesRequestUri"] = baseUriBuilder.Uri.ToString() + "donothing";
                OperationContext.Current.IncomingMessageHeaders.To = new Uri(baseUriBuilder.Uri.ToString() + "donothing");
                operationContext.IncomingMessageProperties["Via"] = new Uri(baseUriBuilder.Uri.ToString() + "donothing");
                request.Headers.To = new Uri(baseUriBuilder.Uri.ToString() + "donothing");
            }

            return null;
        }