WCF REST - 405 Method Not Allowed

Question

I have a RESTFul web service that exposes GET, POST and DELETE methods on a single interface (see below). This is self hosted using WebServiceHost.

I have a client that derives from ClientBase and that uses the exact same interface as exposed by the service.

Running the service locally I can use fiddler to access each of the functions without issue.

In a simple test application I access service using the client and again I can access each of the functions without issue.

However, In my production application (another self hosted webservice) I try to use the exact same client and I get a 405 - Method Not Allowed when calling the DELETE function (POST works fine, I don't use GET). From the WCF logs it appears as though the verb has been changed to POST instead of DELETE. I have no idea what might be causing this behaviour and have run out of ideas as to where to look and what to investigate. 

Help!

[ServiceContract]
public interface ITradeIO
{
    [OperationContract]
    [WebGet(UriTemplate = "/trades/{identId}")]
    TradeData ReadTrade(string identId);
                
    [OperationContract]
    [WebInvoke(Method = "POST", UriTemplate = "/trades")]
    TradeResponseCollection ImportTrade(TradeData trade);
                
    [OperationContract]
    [WebInvoke(Method = "DELETE", UriTemplate = "/trades/{identId}")]
    ResponseCollection DeleteTrade(string identId);
}

Client

public class TradeIOClient : ClientBase<ITradeIO>, ITradeIO
{
}

Client Config

<system.serviceModel>
    <client>
      <endpoint address="http://localhost:8090/InterfaceService/TradeIO/"
        behaviorConfiguration="webHttpBinding_ITradeIO" binding="webHttpBinding"
        bindingConfiguration="webHttpBinding_ITradeIO" contract="InterfaceService.ITradeIO"
        name="RESTfulImport" />
    </client>
    <behaviors>
      <endpointBehaviors>
        <behavior name="webHttpBinding_ITradeIO" >
          <webHttp />
        </behavior>
      </endpointBehaviors>
    </behaviors>
    <bindings>
      <webHttpBinding>
        <binding name="webHttpBinding_ITradeIO" />
      </webHttpBinding>
    </bindings>
  </system.serviceModel>

 

Answer 1

This could be caused by WebDAV Module in IIS:

According to a post on IIS.net (http://forums.iis.net/t/1176772.aspx), you could try adding the following to your web.config:

<system.webServer>    
  <modules>
    <remove name="WebDAVModule" />    
  </modules>  
</system.webServer>

 

Answer 2

Yes, I've read various articles mentioning issues caused by WebDAV, however, I've checked and WebDAV is not installed. Besides, wouldn't this also affect access via Fiddler etc?

Answer 3

Found the solution from this post:

http://www.rgoarchitects.com/nblog/2008/09/28/AnotherWCFGotchaCallingAnotherServiceresourceWithinACall.aspx