服务参考、MTOM 并向 HTTP 标头内容类型添加自定义值

Question

我在 Net 4.6 中使用 Windows 服务，我在 VS 2022 中创建了一个 WSDL 服务的服务引用，一切正常，但现在我必须在 HTTP 标头内容类型中添加一个参数。 问题是我使用的是 MTOM 传输，似乎我无法将任何内容附加到 Content-Type Header。 我试图在方法 BeforeSendRequest 中实现 CustomBehaviour 继承 IEndpointBehavior 和 IClientMessageInspector 的相关 CustomInspector 但似乎我无法读取其中的标头，因为 MTOM 消息在此调用后创建边界元素。

简而言之，我有这个 HTTP 标头 Content-Type

multipart/related;type="application/xop+xml";charset=UTF-8;start-info="application/soap+xml";boundary="uuid:00361b85-692d-43a1-9f17-57d70bbe26df+id= 1"

我必须像这样“附加”一些

action="{action}";

可能吗？

这是我的示例代码

            WSHttpBinding wsHttpBinding = new WSHttpBinding();
            wsHttpBinding.Security.Mode = SecurityMode.Transport;
            wsHttpBinding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Certificate;
            wsHttpBinding.MessageEncoding = WSMessageEncoding.Mtom;
            
            Client = new ServiceClient(wsHttpBinding, new EndpointAddress(EndPoint));

这里我称我的自定义行为

Client.Endpoint.Behaviors.Add(new CustomBehavior(action));

然后我实施行为

public class CustomBehavior : IEndpointBehavior
        {
            private string action = null;
            
            public CustomBehavior(string action, byte[] file)
            {
                this.action = action;
                
            }

            public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters) { }

            public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher) { }

            public void Validate(ServiceEndpoint endpoint) { }

            public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
            {
                clientRuntime.MessageInspectors.Add(new CustomInspector(this.action));
            }
        }
        private class CustomInspector : IClientMessageInspector
        {
            private string action;

            public CustomInspector(string action)
            {
                this.action = action;
            }

            public void AfterReceiveReply(ref Message reply, object correlationState)
            {

            }

            public object BeforeSendRequest(ref Message request, IClientChannel channel)
            {
               HttpRequestMessageProperty reqProps = request.Properties[HttpRequestMessageProperty.Name] as HttpRequestMessageProperty;

                if (reqProps != null)
                {
                    reqProps = new HttpRequestMessageProperty();
                }




                reqProps.Headers.Add("Content-Type", $"multipart/related;type=\"application/xop+xml\";charset=UTF-8;start-info=\"application/soap+xml\";action=\"{action}\";boundary=\"uuid:00361b85-692d-43a1-9f17-57d70bbe26df+id=1\";");
                request.Properties[HttpRequestMessageProperty.Name] = reqProps;


                return null;
            }
        }

那我就用它

 using (OperationContextScope scope = new OperationContextScope((Client as DocumentRepository_PortTypeClient).InnerChannel))
            {

//I try to read header here but they are empty
var obj = OperationContext.Current.OutgoingMessageProperties;

response = Client.call(request);
}