C# WCF 元数据端点不工作（IIS 和 ASP.NET 开发服务器）

Question

我有一个胖客户端，它在多个 WCF 服务上打开通道。这些服务是使用 C#、WCF、nHibernate、Fluent 和 Unity (ServiceHostFactory) 构建的。

当我尝试通过浏览器访问 Plate.svc 的元数据时，我收到 400 错误请求，该请求不会生成日志语句，尽管来自应用程序的良好请求会生成日志语句。来自应用程序的所有请求都正常工作。

有什么想法吗？

我已包含以下文件的重要部分：

1. 服务标记
2. 服务合同
3. 服务 Web.config
4. 客户端 App.config

1. 服务标记

ServiceHost Language="C#" Debug="true" Service="PRO.Services.PlateService" CodeBehind= "Plate.svc.cs" Factory="PRO.Services.Configuration.UnityServiceHostFactory"

2. 服务合同

namespace PRO.ServiceContracts {
    [ServiceContract]
    public interface IPlateService {
        [OperationContract]
        [WebInvoke(Method = "POST", BodyStyle = WebMessageBodyStyle.WrappedRequest)]
        [FaultContract(typeof(string))]
        AnalysisPlate Search(string barcode);

        // identically defined operations removed
    }
}

3. 服务 Web.config

   <system.serviceModel>
    <bindings>
      <basicHttpBinding>
        <binding name="BasicHttpEndpointBinding">
          <security mode="None">
            <transport clientCredentialType="None" />
          </security>
        </binding>
      </basicHttpBinding>
    </bindings>
    <behaviors>
      <serviceBehaviors>
        <behavior name="ProBehavior">
          <serviceMetadata httpGetEnabled="true" httpGetUrl=""/>
          <serviceDebug includeExceptionDetailInFaults="true"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true"/>
    <services>
      <service behaviorConfiguration="ProBehavior" name="PRO.Services.PlateService">
        <endpoint address="" contract="PRO.ServiceContracts.IPlateService"
                  binding="basicHttpBinding" bindingConfiguration="BasicHttpEndpointBinding"/>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
      </service>
      <service behaviorConfiguration="ProBehavior" name="PRO.Services.SampleService">
        <endpoint address="" contract="PRO.ServiceContracts.ISampleService" 
                  binding="basicHttpBinding" bindingConfiguration="BasicHttpEndpointBinding"/>
      </service>
    </services>
   </system.serviceModel>
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true">
    </modules>
  </system.webServer>

4. 客户端 App.config

 <system.serviceModel>
    <bindings>
      <basicHttpBinding>
        <binding name="BasicHttpBinding_Normal">
          <security mode="TransportCredentialOnly">
            <transport clientCredentialType="Windows" proxyCredentialType="None" realm="" />
            <message clientCredentialType="UserName" algorithmSuite="Default" />
          </security>
        </binding>
      </basicHttpBinding>
    </bindings>
    <client>
      <endpoint address="http://localhost:4829/Sample.svc" binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_Normal" contract="PRO.ServiceContracts.ISampleService" name="DEV_ISampleService" />
      <endpoint address="http://localhost:4829/Plate.svc" binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_Normal" contract="PRO.ServiceContracts.IPlateService" name="DEV_IPlateService" />
    </client>
  </system.serviceModel>

Answer 1

事实证明，问题与使用工厂 Factory="PRO.Services.Configuration.UnityServiceHostFactory" 有关，

有两件事没有得到很好的记录：

1) 将 ServiceHost 与工厂结合使用（不是 WebServiceHost）
2) 您可能需要在自定义服务主机中设置元数据端点，如 Microsoft 的这篇文章中所述：http://msdn.microsoft.com/en-us/library/aa395224.aspx