httplistner:截获对wcf dataservice的请求

我想使用.NET类httpListener拦截对我的自宿主(WebServiceHost)WCF数据服务的请求,以便将“www-authenticate”头添加到响应(用于用户身份验证)。但似乎httpListener没有截获任何进入我的数据服务的请求。httplistner可以为不同的路径工作,只是很好。例子:

httplistner前缀: http://localhost/somePath/
作品: http://localhost/somepath/
不起作用: http://localhost/somePath/myWCFDataService

是否也可以截获通过httplistner进入自托管WCF数据服务(WebServiceHost)的请求?
以下是相关的代码段…

承载WCF数据服务:

WebServiceHost dataServiceHost = new WebServiceHost(typeof(MyWCFDataService));
WebHttpBinding binding = new WebHttpBinding();
dataServiceHost.AddServiceEndpoint(typeof(IRequestHandler), binding, 
    "http://localhost/somePath/myWCFDataService");
dataServiceHost.Open();

HTTP列表器:

HttpListener httpListener = new HttpListener();
httpListener.Prefixes.Add("http://localhost/somePath/");
httpListener.AuthenticationSchemes = AuthenticationSchemes.Anonymous;
httpListener.Start();

while (true)
{
    HttpListenerContext context = httpListener.GetContext();
    string authorization = context.Request.Headers["Authorization"];

    if (string.IsNullOrEmpty(authorization))
    {
         context.Response.StatusCode = 401;
         context.Response.AddHeader("WWW-Authenticate", "Basic realm=\"myDataService\"");
         context.Response.OutputStream.Close();
         context.Response.Close();
    }
}

有没有更好的方法在WCF数据服务中进行HTTP基本身份验证?我不能通过网络浏览器的登录对话框进行身份验证。

多谢,
杰霍