尝试将ASP.NET CORE 2 Web API应用程序连接到WCF服务

Question

I began a POC project yesterday to connect to an existing WCF service and I am using a .Net Core 2.1 Web API application and Swagger to post my test request messages. I am using BasicHttpBinding and Transport for BasicHttpSecurityMode.

When sending at test request message, I'm receiving the following exception:

"The HTTP request is unauthorized with client authentication scheme 'Anonymous'. The authentication header received from the server was 'Basic Realm'."

I then created a Microsoft Web API project using .NET Framework 4.6.1 to call the WCF service and I was able to get a Status Code 200 HTTP response.

This seems to me like an issue with a .NET Core 2 Web API project connecting to the WCF service. I've done some research and it looks like this design architecture should definitely be possible.

Microsoft has even developed a provider tool to do exactly this, here is a link to the MS article on the their provider tool: https://docs.microsoft.com/en-us/dotnet/core/additional-tools/wcf-web-service-reference-guide

I have even tried to have my .NET Core Web API controller call a handler class I built in a .NET 4.6.1 class library project to no avail, I still got the “The HTTP request is unauthorized with client authentication scheme 'Basic'. The authentication header received from the server was 'Basic Realm'.” exception.

private static System.ServiceModel.Channels.Binding GetBindingForEndpoint(EndpointConfiguration endpointConfiguration)
        {
            if ((endpointConfiguration == EndpointConfiguration.BasicHttpBinding_IInsuranceService))
            {
                System.ServiceModel.BasicHttpBinding result = new System.ServiceModel.BasicHttpBinding();
                result.MaxBufferSize = int.MaxValue;
                result.ReaderQuotas = System.Xml.XmlDictionaryReaderQuotas.Max;
                result.MaxReceivedMessageSize = int.MaxValue;
                result.AllowCookies = true;
                result.Security.Mode = System.ServiceModel.BasicHttpSecurityMode.Transport;
                return result;
            }
            throw new System.InvalidOperationException(string.Format("Could not find endpoint with name \'{0}\'.", endpointConfiguration));
        }

        private static System.ServiceModel.EndpointAddress GetEndpointAddress(EndpointConfiguration endpointConfiguration)
        {
            if ((endpointConfiguration == EndpointConfiguration.BasicHttpBinding_IInsuranceService))
            {
                return new System.ServiceModel.EndpointAddress("https://myservicebaseURL\myservice.svc");
            }
            throw new System.InvalidOperationException(string.Format("Could not find endpoint with name \'{0}\'.", endpointConfiguration));
        }

Answer 1

Thanks for everyone's input. I was able to solve my problem by following the steps detailed in this article .

Please read below for my updated code to call the WCF service from my .NET Core 2 Web Api:

 public async Task<DataFetchServiceResponseUsingPatient> FetchEntity(String ID)
    {
      var userName = _authenticationSettings.Value.UserName;
      var password = _authenticationSettings.Value.Password;
      var url = _authenticationSettings.Value.Url;

      var basicHttpBinding = new BasicHttpBinding(BasicHttpSecurityMode.Transport);

      basicHttpBinding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Basic;
      ChannelFactory<IMyService> factory = null;
      factory = new ChannelFactory<IMyService>(basicHttpBinding, new EndpointAddress(new Uri(url)));
      factory.Credentials.UserName.UserName = userName;
      factory.Credentials.UserName.Password = password;
      var serviceProxy = factory.CreateChannel();
      ((ICommunicationObject)serviceProxy).Open();
      var opContext = new OperationContext((IClientChannel)serviceProxy);
      var prevOpContext = OperationContext.Current;
      OperationContext.Current = opContext;

      var result = await serviceProxy.MyWCFServiceMethod(ID);

      //Cleanup Factory Objects
      factory.Close();
      ((ICommunicationObject)serviceProxy).Close();
      return result;    
    }