Question

我有2个长期运行的服务方法，我想限制在白天的某个时间段。主要是营业时间以外。这些服务方法是较大合同的一部分，其中包含我希望在所有时间内可用的方法。在不改变整体合同的情况下限制2种方法的最佳方法是什么。 Application_BeginRequest会成为开始的地方吗？返回503服务不适合这里吗？如何检测所请求的方法？

Answer 1

您不需要使用只能MessageInspector in WCF使用的开始请求并尝试拦截所有操作并使用您想要的状态代码进行响应您需要的只是按照以下步骤操作

<强> 1步骤

在您的代码中，您应该添加MessageInspectorExtension

 class MessageInspectorExtension : BehaviorExtensionElement
    {
        public override Type BehaviorType
        {
            get { return typeof(MessageInspector); }
        }

        protected override object CreateBehavior()
        {
            return new MessageInspector();
        }
    }

MessageInspector将完成您需要的所有工作，并且应该像这样定义

//here the `MessageInspector` class showing what are the interfaces responsable for doing this  
public class MessageInspector : IDispatchMessageInspector, IServiceBehavior, IEndpointBehavior
    {
    }

您需要的主要方法是

public object AfterReceiveRequest(ref Message request, IClientChannel channel, InstanceContext instanceContext)
        {
              //here you can add your logic to check  hour and time 
              // 
          return null;  
        }

Which is called after an inbound message has been received but before the message is dispatched to the intended operation

和

public void BeforeSendReply（ref message reply，object correlationState） {
if（！reply.IsFault）返回;

    if (!reply.Headers.Action.StartsWith("your actin here", StringComparison.Ordinal)) return;
    //get the string value for desired response code
    string statusCodeString = reply.Headers.Action.Substring(17);
    //convert to int
    int statusCodeInt;
    if (!int.TryParse(statusCodeString, out statusCodeInt)) return;

    //cast to HttpStatusCode
    System.Net.HttpStatusCode statusCode = System.Net.HttpStatusCode.ServiceUnavailable;
    try
    {
        statusCode = (System.Net.HttpStatusCode)statusCodeInt;
    }
    catch (Exception ex)
    {
        return;
    }

    // Here the response code is changed
    reply.Properties[HttpResponseMessageProperty.Name] = new HttpResponseMessageProperty() { StatusCode = statusCode };
}

}
} 在操作返回之后但在发送回复消息之前调用该函数

<强>两步

在您的应用配置中，您必须添加如下所示的行为定义

    <behaviors>
          <endpointBehaviors>           
            <behavior name="ServiceBehaviorWithInterceptor">
              <ServiceInspector/>
            </behavior>
          </endpointBehaviors>
        <behaviors>
<!--Extensions-->   
     <extensions>
          <behaviorExtensions>
            <add name="ServiceInspector" type="yourNameSpace.MessageInspector.MessageInspectorExtension, assemblyname, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null"/>
          </behaviorExtensions>
        </extensions>

＆＃34; 3步

<service name="yourServiceContractFullName" behaviorConfiguration="ServiceBehaviorWithInterceptor">
        <host>
          <baseAddresses>
            <add baseAddress="http://yourserver:port/root/yourServiceContract" />
          </baseAddresses>
        </host>
        <endpoint address="" binding="basicHttpBinding" bindingConfiguration="basicHttpsBindingConfig" contract="YourContract" />
      </service>

将服务方法限制在特定时间

1 个答案: