"net.pipe://"不支持请求的升级



我正在尝试在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 - 在代码中。

我看到过这个问题,但它似乎总是只用于在app/web.config文件中定义NetNamedPipe的情况。

尝试调用服务时,出现错误:

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();
    }
}

接口位于类库项目中,在主机应用程序(Windows 服务)和尝试调用服务的客户端应用程序之间共享。

Service

类和 OnStart 函数位于 Windows Service 项目中。

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

另外,每当我尝试使用代理时,我发现它State == CommunicationState.Faulted。然后我关闭/中止它,并创建一个new ManagerProxy().然后Created ManagerProxy的状态。我尝试调用HelloWorld并获得上述Exception.
下次我尝试使用它时 - 它的状态再次Faulted并且该过程重复。

我能看到的唯一区别是,在服务器端创建绑定时明确没有安全模式binding = new NetNamedPipeBinding(NetNamedPipeSecurityMode.None);,而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.Protocol异常:请求的升级不是 由'net.pipe://localhost/manager'支持。这可能是由于 不匹配的绑定(例如,在客户端上启用的安全性和 不在服务器上)。

刚刚在这里检查,默认安全模式不是NetNamedPipeSecurityMode.None它是NetNamedPipeSecurityMode.Transport .所以那里有不匹配。

如果上述解决方案都不适合您,请尝试从终端节点中删除标识,如下所示:

<endpoint
    address="net.tcp://127.0.0.1/FacilitySchedulesService/FacilitySchedulesService.svc"
    binding="netTcpBinding"
    bindingConfiguration="FacilityScheduleDSTCP"
    contract="FacilitySchedules.IFacilitySchedulesService"
    name="FacilityScheduleDSTCP">
    <!--
    <identity>
        <userPrincipalName value="abc" />
    </identity>
    -->
</endpoint>

另一种情况可能是,在绑定配置中选择的安全模式使用了不正确的子节点名称。在下面的示例中,使用了"消息"节点,尽管选择了传输模式,但会导致"不支持请求的升级"异常:

<security mode="Transport">
   <message clientCredentialType="Certificate"/>
</security>

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