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PODouble request while making POX REST call using WCF with WebHttpBinding set to Basic Authentication
 

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  1. PODouble request while making POX REST call using WCF with WebHttpBinding set to Basic Authentication
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    <p>Having an issue while making POX REST call using WCF with WebHttpBinding set to Basic Authentication (HttpClientCredentialType.Basic)</p> <p>Instead of one call from the client with “Authorization: Basic” specified in HTTP Header, two calls are made. First call without authentication at all to which service responses with 401 Unauthorized error, second call with proper authentication info.</p> <p>This seems to be handled by WCF service with no hiccup at all. Calling third party services obviously creates a problem since they respond with error immediately.</p> <p>Service Code:</p> <pre><code>[ServiceContract] public interface IService { [OperationContract] [WebInvoke(BodyStyle = WebMessageBodyStyle.Bare, RequestFormat = WebMessageFormat.Xml, UriTemplate = "")] Message SendData(Message message); } public class Service : IService { public Message SendData(Message message) { return Message.CreateMessage(MessageVersion.None, String.Empty, "test"); } } </code></pre> <p>Client Code: </p> <pre><code>public class Client: WebChannelFactory&lt;IService&gt;, IService { public Client(Uri baseUri, string userName, string password) : base(CreateBinding(), baseUri) { Credentials.UserName.UserName = userName; Credentials.UserName.Password = password; } public Message SendData(Message requestMessage) { var channel = CreateChannel(); Message responseMessage = channel.SendData(requestMessage); return responseMessage; } private static Binding CreateBinding() { var binding = new WebHttpBinding(); binding.Security.Mode = WebHttpSecurityMode.TransportCredentialOnly; binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Basic; return binding; } } </code></pre> <p>Using TcpTrace I’m seeing these to requests back to back: </p> <pre><code>POST / HTTP/1.1 Content-Type: application/xml; charset=utf-8 VsDebuggerCausalityData: uIDPo2lH6p+lUOdFmrqDKGWYeQkAAAAA7+Y4QR6wNUWZmwCaasMx7xrfcJZxph9NocstwCh8NQsACQAA Host: localhost:9090 Content-Length: 89 Expect: 100-continue Connection: Keep-Alive &lt;string xmlns="http://schemas.microsoft.com/2003/10/Serialization/"&gt;test request&lt;/string&gt; POST / HTTP/1.1 Content-Type: application/xml; charset=utf-8 VsDebuggerCausalityData: uIDPo2lH6p+lUOdFmrqDKGWYeQkAAAAA7+Y4QR6wNUWZmwCaasMx7xrfcJZxph9NocstwCh8NQsACQAA Authorization: Basic dGVzdDp0ZXN0 Host: localhost:9090 Content-Length: 89 Expect: 100-continue &lt;string xmlns="http://schemas.microsoft.com/2003/10/Serialization/"&gt;test request&lt;/string&gt; </code></pre> <p>Note only second call contains: <strong>Authorization: Basic dGVzdDp0ZXN0</strong> How to stop the first request (without authorization) to be made?</p> <p>Sample solution with TcpTrace utility can be downloaded here:</p> <p><a href="http://www.coohya.com/WCF-BasicAuthenticationIssue.zip" rel="nofollow noreferrer">WCF-BasicAuthenticationIssue.zip</a></p>
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