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问题:
I'm working on a Windows Form application and there's a WCF service that needs to be called. I need to add a header (authorization - custom) to the request before it's sent to the service. I have a custom inspector class as well. I tried the following but the service is not called, somehow, and it returns an exception.
public object BeforeSendRequest(ref Message request, IClientChannel channel) { MessageHeader header = MessageHeader.CreateHeader("Authorization", "", "Basic Y19udGk6Q29udGlfQjNTVA=="); OperationContext.Current.OutgoingMessageHeaders.Add(header); HttpRequestMessageProperty httpRequestProperty = new HttpRequestMessageProperty(); httpRequestProperty.Headers.Add("Authorization", "Basic Y19udGk6Q29udGlfQjNTVA=="); httpRequestProperty.Headers.Add(HttpRequestHeader.UserAgent, "Continental"); OperationContext.Current.OutgoingMessageProperties[HttpRequestMessageProperty.Name] = httpRequestProperty; sentMessages.Add(request.ToString()); return null; }
I also tried simplest way like this one:
MessageHeader header = MessageHeader.CreateHeader("Authorization", "", "Basic Y19udGk6Q29udGlfQjNTVA=="); request.Headers.Add(header);
but it's the same, authorization header is added but it does not reach the service, how can I know what header is received by the service? I used SOAP UI and service responds well when I add such a header manually in the request (before running).
回答1:
The simplest way is to add it on the client side:
using (MyServ.ServiceClient proxy = new MyServ.ServiceClient()) { using (new System.ServiceModel.OperationContextScope(proxy.InnerChannel)) { MessageHeader head = MessageHeader.CreateHeader("Authorization", "http://yournamespace.com/v1", data); OperationContext.Current.OutgoingMessageHeaders.Add(head); } }
and retrieve it on the server side:
string auth = OperationContext.Current.IncomingMessageHeaders. GetHeader("Authorization", "http://mynamespace.com/v1");
I also suggest that you check these articles:
Authorization Header is missing in Http request using WCF
WCF Service with wsHttpBinding - Manipulating HTTP request headers
回答2:
If there's some problem with your BeforeSend method, this is how I implemented it when adding authentication to some webservice calls.
private const string Authorization = "Authorization"; public object BeforeSendRequest(ref Message request, IClientChannel channel) { object httpRequestMessageObject; if (request.Properties.TryGetValue( HttpRequestMessageProperty.Name, out httpRequestMessageObject)) { var httpRequestMessage = httpRequestMessageObject as HttpRequestMessageProperty; if (string.IsNullOrWhiteSpace(httpRequestMessage.Headers[Authorization])) { httpRequestMessage.Headers[Authorization] = "Basic Y19udGk6Q29udGlfQjNTVA=="; } } else { var httpRequestMessage = new HttpRequestMessageProperty(); httpRequestMessage.Headers.Add(Authorization, "Basic Y19udGk6Q29udGlfQjNTVA=="); request.Properties.Add(HttpRequestMessageProperty.Name, httpRequestMessage); } return null; }
回答3:
The problem with your solution is that it would add an HTTP header. What you need is a SOAP header, however. That could be done like this...
using(new OperationContextScope(client.InnerChannel)) { // Add a SOAP Header to an outgoing request MessageHeader aMessageHeader = MessageHeader.CreateHeader("UserInfo", "http://tempuri.org", userInfo); OperationContext.Current.OutgoingMessageHeaders.Add(aMessageHeader); }
回答4:
I know this is late but I ran across this post so decided to fill this in, in case I ever need to remember this again. This worked for me:
Create the Message Inspector:
Public Class AuthenticationHeader Implements IClientMessageInspector Private itsUser As String Private itsPass As String Public Sub New(ByVal user As String, ByVal pass As String) itsUser = user itsPass = pass End Sub Public Sub AfterReceiveReply(ByRef reply As Message, correlationState As Object) Implements IClientMessageInspector.AfterReceiveReply Console.WriteLine("Received the following reply: '{0}'", reply.ToString()) End Sub Public Function BeforeSendRequest(ByRef request As Message, channel As IClientChannel) As Object Implements IClientMessageInspector.BeforeSendRequest Dim hrmp As HttpRequestMessageProperty = request.Properties("httpRequest") Dim encoded As String = System.Convert.ToBase64String(System.Text.Encoding.GetEncoding("ISO-8859-1").GetBytes(itsUser + ":" + itsPass)) hrmp.Headers.Add("Authorization", "Basic " + encoded) Return request End Function End Class
Write the Behavior:
Public Class AuthenticationHeaderBehavior Implements IEndpointBehavior Private ReadOnly itsUser As String Private ReadOnly itsPass As String Public Sub New(ByVal user As String, ByVal pass As String) MyBase.New() itsUser = user itsPass = pass End Sub Public Sub AddBindingParameters(endpoint As ServiceEndpoint, bindingParameters As BindingParameterCollection) Implements IEndpointBehavior.AddBindingParameters End Sub Public Sub ApplyClientBehavior(endpoint As ServiceEndpoint, clientRuntime As ClientRuntime) Implements IEndpointBehavior.ApplyClientBehavior clientRuntime.MessageInspectors.Add(New AuthenticationHeader(itsUser, itsPass)) End Sub Public Sub ApplyDispatchBehavior(endpoint As ServiceEndpoint, endpointDispatcher As EndpointDispatcher) Implements IEndpointBehavior.ApplyDispatchBehavior End Sub Public Sub Validate(endpoint As ServiceEndpoint) Implements IEndpointBehavior.Validate End Sub End Class
Add it to your endpoint:
Dim binding As New WebHttpBinding(WebHttpSecurityMode.Transport) binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.None ChlFactory = New WebChannelFactory(Of IMyServiceContract)(binding, New Uri(url)) ChlFactory.Endpoint.Behaviors.Add(New WebHttpBehavior()) ChlFactory.Endpoint.Behaviors.Add(New AuthenticationHeaderBehavior(user, pass)) Channel = ChlFactory.CreateChannel()
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