WCF 客户端使用带有 Soap 标头的 ASMX Web 服务

Question

我有一个 ASMX Web 服务，需要一个肥皂头和一个通过服务引用 (WCF) 使用该服务的客户端应用程序。

服务器：

[WebService(Namespace = "http://myserviceurl.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class Service1 : System.Web.Services.WebService
{
    public MyCustomSoapHeader MyHeader;

    [WebMethod]
    [SoapHeader("MyHeader", Direction = SoapHeaderDirection.In)]
    public string MyMethod()
    {
        if(MyHeader.SomeProperty == false)
        {
             return "error";
        }
        return "success";
    }

    public class MyCustomSoapHeader: SoapHeader
    {
        public bool SomeProperty { get; set; }
    }
}

客户端：

public class MyClient
{
    var address = new EndpointAddress(_myServerUrl)

    var binding = new BasicHttpBinding();
    binding.Name = "SoapBinding";
    binding.Security.Mode = BasicHttpSecurityMode.TransportCredentialOnly;
    binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Ntlm;
    binding.HostNameComparisonMode = HostNameComparisonMode.StrongWildcard;
    binding.ReceiveTimeout = TimeSpan.FromSeconds(_timeout);

    Service1SoapClient client = new Service1SoapClient(binding, address);

    string expected = client.MyMethod(new MyCustomSoapHeader(){SomeProperty = true});
}

堆栈跟踪：

System.ServiceModel.FaultException: Server was unable to process request. ---> Computer name could not be obtained.

Server stack trace: 
   at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

如何在仍在使用 WCF 的客户端上修复此问题？我无法更改服务器代码，并且需要在客户端上使用 WCF，无法添加 Web 引用。

Answer 1

基于我刚刚回答的另一个问题（关于读出 SOAP 标头），此方法应该可以满足您在从 WCF 客户端调用 ASMX 服务时包含 SOAP 标头的要求：

Service1SoapClient client = new Service1SoapClient(binding, address);

using(OperationContextScope scope = new OperationContextScope(client.InnerChannel))
{
    // set the message in header
    MessageHeader header = MessageHeader.CreateHeader("MyHeader", "urn:Sample-NS", "Some Value");
    OperationContext.Current.OutgoingMessageHeaders.Add(header); 

    string expected = client.MyMethod(new MyCustomSoapHeader(){SomeProperty = true});
}

我希望这可行 - 我真的没有基础设施现在就在手头测试一下......

Answer 2

此时您的问题看起来根本与 SOAP 标头无关...“无法获取计算机名称”错误来自其他地方。

您在客户端上指定什么作为服务 URL？服务与客户端运行在同一台机器上，还是不同的机器上？该服务是否可以与其他非 WCF 客户端一起使用？