使用自定义 ServiceHost 会禁用简化配置吗？

Question

我有一些一次性初始化任务要在服务启动时完成，为了做到这一点，我定义了一个自定义的 ServiceHostFactory 和 ServiceHost 来覆盖 InitializeRuntime。

Service1.svc 标记：

<%@ ServiceHost Language="C#" Debug="true" Factory="service.Our_Service_Host_Factory" Service="service.Service1" CodeBehind="Service1.svc.cs" %>

服务主机定义：

public class Our_Service_Host_Factory : ServiceHostFactory
{
    protected override ServiceHost CreateServiceHost(Type serviceType, Uri[] baseAddresses)
    {
        return new Our_Service_Host(serviceType, baseAddresses);
    }
}

class Our_Service_Host : ServiceHost
{
    public Our_Service_Host(Type serviceType, Uri[] baseAddresses)
        : base(serviceType, baseAddresses) { }

    protected override void InitializeRuntime()
    {
         // one time setup code
    }
}

来自 web.config 的片段：

<system.serviceModel>
  <behaviors>
    <serviceBehaviors>
      <behavior>
        <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true"/>
        <serviceDebug includeExceptionDetailInFaults="false"/>
      </behavior>
    </serviceBehaviors>
  </behaviors>
  <protocolMapping>
    <add binding="basicHttpsBinding" scheme="https" />
  </protocolMapping>    
  <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
</system.serviceModel>

如果我删除 ServiceHost 标记上的 Factory 属性，WCF 测试客户端可以成功连接到我的服务。如果我把它放回去，它找不到元数据端点并出现以下错误：

Error: Cannot obtain Metadata from http://localhost:50154/Service1.svc If this is a Windows (R)
Communication Foundation service to which you have access, please check that you have enabled 
metadata publishing at the specified address.  For help enabling metadata publishing, please 
refer to the MSDN documentation at http://go.microsoft.com/fwlink/?LinkId=65455.WS-Metadata 
Exchange Error    URI: http://localhost:50154/Service1.svc    Metadata contains a reference that 
cannot be resolved: 'http://localhost:50154/Service1.svc'.    There was no endpoint listening at 
http://localhost:50154/Service1.svc that could accept the message. This is often caused by an 
incorrect address or SOAP action. See InnerException, if present, for more details.    The 
remote server returned an error: (404) Not Found.HTTP GET Error    URI: 
http://localhost:50154/Service1.svc    There was an error 
downloading 'http://localhost:50154/Service1.svc'.    The request failed with HTTP status 404: 
Not Found.

看起来拥有自定义 ServiceHost/ServiceHostFactory 可能会破坏简化配置。是这样吗，还是有什么我忽略的东西会使它继续工作？

Answer 1

如果您覆盖 InitializeRuntime()，请确保调用 base.InitializeRuntime()，否则您可能会看到此行为。在调用我的附加启动逻辑之前调用 base.InitializeRuntime() 之后，我的服务现在被正确路由到。