WCF 轮询双工绑定和非 Silverlight 客户端

Question

我花了很长时间才弄清楚这个问题。我有一个 WCF 服务，需要将信息推送到 Silverlight 客户端，但我需要一个控制台应用程序才能参与其中。谁能给我提示一下我的 Web.Config 应该是什么样子来指定控制台应用程序可以访问的附加绑定？当我认为我的工作正常时，SL 客户端无法接收任何消息...

这是我当前的 Web.Config：

<?xml version="1.0"?>

<configuration>
  <system.web>
    <compilation debug="true" targetFramework="4.0" />
  </system.web>

  <system.serviceModel>
    <extensions>
      <bindingExtensions>
        <add name="pollingDuplex" type="System.ServiceModel.Configuration.PollingDuplexHttpBindingCollectionElement,System.ServiceModel.PollingDuplex, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
      </bindingExtensions>
    </extensions>

    <behaviors>
      <serviceBehaviors>
        <behavior name="">
          <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
          <serviceMetadata httpGetEnabled="true"/>
          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="true"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>

    <!-- Create the polling duplex binding. -->
    <bindings>
      <pollingDuplex>
        <binding name="myPollingDuplex"
                 duplexMode="MultipleMessagesPerPoll">
        </binding>
      </pollingDuplex>
    </bindings>

    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
    <services>
      <service name ="EdiManager.Web.EdiPubSub">
        <endpoint address=""
                  binding="pollingDuplex"
                  bindingConfiguration="myPollingDuplex"
                  contract="EdiManager.Web.EdiPubSub"
                  />
        <endpoint address="mex" 
                  binding="mexHttpBinding"
                  contract="IMetadataExchange" >
          <identity>
            <dns value="localhost" />
          </identity>
        </endpoint>
      </service>
    </services>
    </system.serviceModel>
</configuration>

Answer 1

如果您不需要全双工，只需使用 wsHttpBinding 而不是 mex （或提供更多信息您想要实现什么）。

Answer 2

您是否希望控制台应用程序也参与轮询双工连接？或者您想使用不同的查询-响应绑定？

另外，我注意到您正在将 AspNetCompatibility 与轮询双工一起使用。如果您正在访问会话状态，您将遇到一些性能问题。我写了一篇关于它的简短的博客文章引用 MSDN 博客文章 包含测试信息。

简而言之，轮询双工是一个长时间超时的操作。会话状态会锁定，并且在轮询超时之前以及在建立另一个连接再次锁定会话状态提供程序之前，其他请求都无法继续。

Answer 3

我能够通过使用 WCF 服务编辑器编辑配置来使其工作，而不是手动完成。显然我在手动编辑配置时犯了一些错误。这是有效的 web.config：

<?xml version="1.0"?>
<configuration>
  <system.web>
    <compilation debug="true" targetFramework="4.0" />
  </system.web>

  <system.serviceModel>
    <extensions>
      <bindingExtensions>
        <add name="pollingDuplex" type="System.ServiceModel.Configuration.PollingDuplexHttpBindingCollectionElement,System.ServiceModel.PollingDuplex, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
      </bindingExtensions>
    </extensions>

    <behaviors>
      <serviceBehaviors>
        <behavior name="">
          <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
          <serviceMetadata httpGetEnabled="true"/>
          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>

    <!-- Create the polling duplex binding. -->
    <bindings>
      <wsDualHttpBinding>
        <binding name="myDualHttp" />
      </wsDualHttpBinding>
      <pollingDuplex>
        <binding name="myPollingDuplex" duplexMode="MultipleMessagesPerPoll" />
      </pollingDuplex>
    </bindings>
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
    <services>
      <service name="EdiManager.Web.EdiPubSub">
        <endpoint address="Silverlight" binding="pollingDuplex" bindingConfiguration="myPollingDuplex"
          name="Silverlight" contract="EdiManager.Web.EdiPubSub" />
        <endpoint address="Console" binding="wsDualHttpBinding" bindingConfiguration="myDualHttp"
          name="Console" contract="EdiManager.Web.EdiPubSub" />
      </service>
    </services>
    </system.serviceModel>
</configuration>