"net.pipe://"不支持请求的升级

Question

我试图在Windows服务中托管WCF net.pipe服务.我在Windows服务的OnStart()函数中用代码定义服务.我也以类似的方式创建客户端 - 代码.

我已经看到了这个问题,但它似乎总是专门用于在app/web.config文件中定义NetNamedPipe的情况.

尝试调用该服务时,我收到错误:

System.ServiceModel.ProtocolException: The requested upgrade is not supported by 'net.pipe://localhost/manager'. This could be due to mismatched bindings (for example security enabled on the client and not on the server).

Server stack trace: 
   at System.ServiceModel.Channels.ConnectionUpgradeHelper.DecodeFramingFault(ClientFramingDecoder decoder, IConnection connection, Uri via, String contentType, TimeoutHelper& timeoutHelper)
   at System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.SendPreamble(IConnection connection, ArraySegment`1 preamble, TimeoutHelper& timeoutHelper)
   at System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.DuplexConnectionPoolHelper.AcceptPooledConnection(IConnection connection, TimeoutHelper& timeoutHelper)
   at System.ServiceModel.Channels.ConnectionPoolHelper.EstablishConnection(TimeSpan timeout)
   at System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.OnOpen(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.OnOpen(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.CallOnceManager.CallOnce(TimeSpan timeout, CallOnceManager cascade)
   at System.ServiceModel.Channels.ServiceChannel.EnsureOpened(TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]: 
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at MyClientApp.IManager.HelloWorld()

这是我的代码:

//Service Contract:
[ServiceContract]
public interface IManager
{
    [OperationContract]
    string HelloWorld();
}

//Service
public class Manager : IManager
{
    public string HelloWorld()
    {
        return "Hello to you too!";
    }
}

//Defining and starting the Net.Pipe Service from the Windows Service
public partial class MyWindowsService : ServiceBase
{
    public MyWindowsService()
    {
        InitializeComponent();
    }

    private ServiceHost m_serviceHost;
    protected override void OnStart(string[] args)
    {
        try
        {
            m_serviceHost = new ServiceHost(typeof(Manager), new Uri("net.pipe://localhost"));
            NetNamedPipeBinding binding = new NetNamedPipeBinding(NetNamedPipeSecurityMode.None);
            m_serviceHost.AddServiceEndpoint(typeof(IManager), binding, "manager");
            m_serviceHost.Open();
        }
        catch (Exception ex)
        {
            EventLog("MyWindowsService", ex.ToString(), EventLogEntryType.Error);
        }
    }
}

//The client proxy
public class ManagerProxy : ClientBase<IManager>
{
    public ManagerProxy()
        : base(new ServiceEndpoint(ContractDescription.GetContract(typeof(IManager)),
            new NetNamedPipeBinding(), new EndpointAddress("net.pipe://localhost/manager"))) { }

    public string InvokeHellowWorld()
    {
        return Channel.HelloWorld();
    }
}

接口位于ClassLibrary项目中,并在主机应用程序(Windows服务)和尝试调用该服务的客户端应用程序之间共享.

Service类和OnStart函数位于Windows服务项目中.

服务代理位于客户端项目中(当然,它与Windows服务在同一台计算机上运行).

此外,每当我尝试使用代理时,我都会发现它State == CommunicationState.Faulted.然后我关闭/中止它,并创建一个new ManagerProxy().ManagerProxy那时的状态是Created.我尝试调用HelloWorld并获得上述内容Exception.
下次我尝试使用它时 - 它的状态再次出现Faulted并重复该过程.

Answer 1

我能看到的唯一区别是,在服务器端,您创建了明确没有安全模式的绑定,binding = new NetNamedPipeBinding(NetNamedPipeSecurityMode.None);并且在客户端没有安全模式new NetNamedPipeBinding().异常消息确实提到安全性是潜在的不匹配.

System.ServiceModel.ProtocolException:'net.pipe:// localhost/manager'不支持请求的升级.这可能是由于绑定不匹配(例如在客户端而不是在服务器上启用安全性).

刚查了这里,默认的安全模式是不是NetNamedPipeSecurityMode.None很NetNamedPipeSecurityMode.Transport.所以那里存在不匹配.