wsDualHttpBinding总是超时，而其他服务按预期工作

Question

我目前开发了几个服务（WCF）来使用TFS 2010。

其中一些使用事件订阅工具，而另一些则通过sharepoint门户、小型wpf应用程序等消费。

我正在开发一个应用程序来管理另一台服务器中的一些内容，例如向服务器发送IIS重置请求，我正在使用wsDualHttpBinding，这样我就可以通过回调向用户发送进展消息。

但我甚至不能调用服务中的方法，因为每当通道试图打开时，无论我的OpenTimeout是什么，我都会收到超时异常

这是我的配置（客户端）

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <system.net>
        <connectionManagement>
            <add maxconnection="200"   address="*"  />
        </connectionManagement>
    </system.net>
    <system.serviceModel>
        <bindings>
            <wsDualHttpBinding>
                <binding name="WSDualHttpBinding_IReset" closeTimeout="00:01:00"
                    openTimeout="00:02:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
                    bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard"
                    maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
                    messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true">
                    <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
                        maxBytesPerRead="4096" maxNameTableCharCount="16384" />
                    <reliableSession ordered="true" inactivityTimeout="00:10:00" />
                    <security mode="None">
                        <message clientCredentialType="Windows" negotiateServiceCredential="true" />
                    </security>
                </binding>
            </wsDualHttpBinding>
            <wsHttpBinding>
                <binding name="WSHttpBinding_IDeploy" closeTimeout="00:01:00"
                    openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
                    bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard"
                    maxBufferPoolSize="1524288" maxReceivedMessageSize="1279748152"
                    messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true"
                    allowCookies="false">
                    <readerQuotas maxDepth="32" maxStringContentLength="81925" maxArrayLength="163848"
                        maxBytesPerRead="9192" maxNameTableCharCount="16384" />
                    <reliableSession ordered="true" inactivityTimeout="00:10:00"
                        enabled="false" />
                    <security mode="None">
                        <transport clientCredentialType="Windows" proxyCredentialType="None"
                            realm="" />
                        <message clientCredentialType="Windows" negotiateServiceCredential="true" />
                    </security>
                </binding>
            </wsHttpBinding>
        </bindings>
        <client>
            <endpoint address="http://tfsserver:8080/TFSFacade/DeployFacade.svc"
                binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_IDeploy"
                contract="DeployFacade.IDeploy" name="WSHttpBinding_IDeploy" />
            <endpoint address="http://tfsserver:8080/DeployService/ResetService.svc"
                binding="wsDualHttpBinding" bindingConfiguration="WSDualHttpBinding_IReset"
                contract="ResetService.IReset" name="WSDualHttpBinding_IReset" />
        </client>
    </system.serviceModel>
    <appSettings>
        <add key="CopiaLocalRollback" value="true"/>
        <add key="CopiaLocalPublish" value="true"/>
        <add key="ModoDiagnostico" value="false" />
        <add key="TempoTimeout" value="300000" />
    </appSettings>
</configuration>

服务器端：

<?xml version="1.0"?>
<configuration>
    <system.web>
        <compilation debug="true" targetFramework="4.0" />
    </system.web>
    <system.serviceModel>
        <serviceHostingEnvironment multipleSiteBindingsEnabled="true" aspNetCompatibilityEnabled="true">
            <baseAddressPrefixFilters>
                <add prefix="http://tfsserver:8080"/>
                <add prefix="http://tfsservices:8080"/>
                <add prefix="http://tfsservices:1001"/>
            </baseAddressPrefixFilters>
        </serviceHostingEnvironment>
        <bindings>
            <wsDualHttpBinding>
                <binding name="WSDualHttpBinding_ResetService" closeTimeout="00:01:00"
                openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
                bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard"
                maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
                messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true">
                    <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
                        maxBytesPerRead="4096" maxNameTableCharCount="16384" />
                    <reliableSession ordered="true" inactivityTimeout="00:10:00" />
                    <security mode="None">
                        <message clientCredentialType="Windows" negotiateServiceCredential="true" />
                    </security>
                </binding>
            </wsDualHttpBinding>
        </bindings>
        <behaviors>
            <serviceBehaviors>
                <behavior name="EventServiceBehavior">
                    <serviceMetadata httpGetEnabled="true" />
                    <serviceDebug includeExceptionDetailInFaults="true" />
                </behavior>
                <behavior name="">
                    <serviceMetadata httpGetEnabled="true" />
                    <serviceDebug includeExceptionDetailInFaults="false" />
                </behavior>
            </serviceBehaviors>
        </behaviors>
        <services>
            <service behaviorConfiguration="EventServiceBehavior" name="DeployService.ResetService">
                <endpoint address="" binding="wsDualHttpBinding" bindingConfiguration="WSDualHttpBinding_ResetService"
                  contract="DeployService.Contracts.IReset" />
            </service>
        </services>
    </system.serviceModel>
    <system.webServer>
        <modules runAllManagedModulesForAllRequests="true"/>
    </system.webServer>
</configuration>

合同：

[ServiceContract(SessionMode = SessionMode.Required,
             CallbackContract = typeof(IResetCallback))]
public interface IReset
{
    [OperationContract]
    void ExecutarIISReset();
}
[ServiceContract]
public interface IResetCallback
{
    [OperationContract(IsOneWay = true)]
    void PumpMessage(string message);
    [OperationContract(IsOneWay = true)]
    void PumpResponsiveMessage(ResponsiveMessage message);
    [OperationContract(IsOneWay = true)]
    void PumpLogDeployBEMessage(LogDeployBE message);
    bool Confirmar();
    ServidorModel[] GetServidores();
}

服务（由于问题在到达之前发生，因此不公布代码）：

[AspNetCompatibilityRequirementsAttribute(RequirementsMode = AspNetCompatibilityRequirementsMode.Required)]
[ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple)] 
public class ResetService : IReset
{
    //Stuff here
}

在fiddler中，我在客户端上得到了这个：

7 202 HTTP tfsserver:8080 /DeployService/ResetService.svc 0 private resetman.vshost:9000

我得到了202好几次，然后时间过去了，超时发生了

在服务器上乱搞，我什么也得不到。

可能会发生什么？

编辑：奇怪，localhost可以工作。wsDualHttpBinding需要特殊权限吗？在"互联网"上找不到任何东西

Answer 1

由于您使用的是wsDualHttpBinding，因此您的服务器和客户端都需要可以通过配置中指定的端口访问。这就是它在本地机器上工作的原因，因为你没有任何端口问题。超时与防火墙阻塞或服务器无法路由回客户端一致。

如果您的客户端可以通过添加防火墙或端口转发规则轻松访问，那么wsDualHttpBinding可能仍然适用——否则使用wsDualHttpBinding可能并不理想。在这种情况下，您可能需要让客户端轮询消息，而不是通过回调接收消息（即客户端拉取消息，而非通过回调推送消息）

请参阅这篇文章了解更多信息。还有这个。

Answer 2

尝试

• ConcurrencyMode = ConcurrencyMode.Reentrant
• InstanceContextMode = InstanceContextMode.Single
• 删除SessionMode.Required

关于您的服务行为

Answer 3

我遇到了同样的问题。在客户端应用程序中的以下代码的帮助下，我通过将绑定配置传递给服务解决了这个问题。这会让你对如何实现目标有一个想法。它在我的大多数系统中都适用，但在某些系统中仍然存在超时问题。可能的原因无法绑定端口。

      Service objService = new Service(objClass, "WSDualHttpBinding_ISendChatService");
            WSDualHttpBinding binding = objService.Endpoint.Binding as WSDualHttpBinding;
            int portNumber = FreeTcpPort();
            string hostName = Dns.GetHostName();
            binding.ClientBaseAddress = new Uri("http://"+Dns.GetHostByName(hostName).AddressList[0].ToString()+":" + portNumber + "/");            
            objService.Start(name);

static int FreeTcpPort()
        {
            TcpListener l = new TcpListener(IPAddress.Loopback, 0);
            l.Start();
            int port = ((IPEndPoint)l.LocalEndpoint).Port;
            l.Stop();
            return port;
        }