Custom ASP.NET Forms Authentication Service with WCF

I am trying to create a custom ASP.NET Forms Authentication Service using WCF. I am calling it via a test page that contains only a single line of JS (except for the ScriptManager scripts). The problem is that the server returns response code 500 and the response body is empty. My breakpoints in the service method and in the Application_Error in Global.asax are not being hit.

Sys.Services.AuthenticationService.login('user', 'pass', false, null, null, null, null, null);

I can see the request go to the server in the browser tools with the following request body:

{"userName":"user","password":"pass","createPersistentCooki开发者_运维技巧e":false}

Other things on the request side also seem fine.

Here is the configuration service:

<system.serviceModel>
  <behaviors>
    <endpointBehaviors>
      <behavior name="BtxAuthenticationEndpointBehavior">
        <webHttp/>
      </behavior>
    </endpointBehaviors>
    <serviceBehaviors>
    </serviceBehaviors>
  </behaviors>
  <services>
    <service name="MyNamespace.BtxAuthenticationService">
      <endpoint contract="MyNamespace.IBtxAuthenticationService" binding="webHttpBinding" behaviorConfiguration="BtxAuthenticationEndpointBehavior"/>
    </service>
  </services>
</system.serviceModel>

And the declaration of the interface:

[ServiceContract]
public interface IBtxAuthenticationService
{
    [OperationContract]
    [WebInvoke]
    bool Login(string username, string password, bool createPersistentCookie);

    [OperationContract]
    [WebInvoke]
    void Logout();
}

The implementation:

public class BtxAuthenticationService : IBtxAuthenticationService
{
    public bool Login(string username, string password, bool createPersistentCookie)
    {
        ... irrelevant because this is never hit
    }

    public void Logout()
    {
    }
}

Can someone tell me how to configure this or point me to a way to debug it. An article about implementing custom Forms Authentication with a WCF service will be welcome too. I've tried experimenting with various other settings including all the exception details settings I could find but could not make any progress (though I was able to make some regress and get different exceptions like missing endpoints and so on).

Thank you for your time.

---

Not sure if this helps. I have never written such service but your configuration creates WCF service wich is not ASP.NET AJAX ready and works with XML instead of JSON. Try to use this instead of webHttp behavior:

<endpointBehaviors> 
  <behavior name="BtxAuthenticationEndpointBehavior"> 
    <enableWebScript /> 
  </behavior> 
</endpointBehaviors>