我在通过位于此处的标题为“集中式Cookie管理”标题下列出的方法进行WCF服务调用时管理共享身份验证Cookie:http://megakemp.com/2009/02/06/managing-shared-cookies-in-wcf/
我已经设置了自定义IClientMessageInspector
,IEndpointBehavior
,BehaviorExtensionElement
这些作品。我的端点行为添加了一个消息检查器,如下所示:
public class MyEndpointBehavior : IEndpointBehavior
{
public void AddBindingParameters(ServiceEndpoint endpoint, System.ServiceModel.Channels.BindingParameterCollection bindingParameters)
{
}
public void ApplyClientBehavior(ServiceEndpoint endpoint, System.ServiceModel.Dispatcher.ClientRuntime clientRuntime)
{
// yuck.. Wish I had an instance of MyClientMessageInspector
// (which has the auth cookie already) so I could just inject that
// instance here instead of creating a new instance
clientRuntime.MessageInspectors.Add(new MyClientMessageInspector());
}
public void ApplyDispatchBehavior(ServiceEndpoint endpoint, System.ServiceModel.Dispatcher.EndpointDispatcher endpointDispatcher)
{
}
public void Validate(ServiceEndpoint endpoint)
{
}
}
这一切都可以完美无缺,但是当您希望在多个客户端上共享Cookie 时,此解决方案会崩溃。由于ApplyDispatchBehavior()
方法创建了一个新实例,因此任何其他客户端都不会获取该消息检查器实例,因此也不会获取该身份验证票证。
那么我想尝试创建一个自定义构造函数,我可以像这样注入实例:
MyEndpointBehavior(MyClientMessageInspector msgInspector) { ... }
但是,WCF需要无参数构造函数。通过互联网除草,WCF有钩子允许依赖注入,创建IInstanceProvider
,IServiceBehavior
等。但我不认为这就是我在这里寻找的。 p>
任何人都可以帮助指导我朝正确的方向发展吗?
答案 0 :(得分:5)
您只需要扩展概念,以便将cookie存储在消息检查器本身之外,以便消息检查器的所有实例共享相同的存储。
穷人的方式就是开始使用静态字段而不是实例字段。显然,如果你有多个线程,你需要在更新字段时提供并发性。如果你将它推广到一个cookie容器概念,然后确保你与所有客户共享同一个容器,你可以从那里获得更好的体验。共享容器可以通过获取客户端通道的ChannelParameterCollection
并向其添加属性来完成,然后您的行为在检查消息并从中拉出cookie时查找该属性。这看起来有点像这样:
应用逻辑
// Hold onto a static cookie container
public static CookieContainer MyCookieContainer;
// When instantiating the client add the cookie container to the channel parameters
MyClient client = new MyClient();
client.InnerChannel.GetProperty<ChannelParameterCollection>().Add(MyCookieContainer);
消息检查器逻辑
public void BeforeSendMessage(ref Message, IClientChannel clientChannel)
{
// Find the cookie container for the current channel
CookieContainer cookieContainer = clientChannel.GetProperty<ChannelParameterCollection>().Select(p => p as CookieContainer).Where(cc => cc != null).First();
// ... use the cookie container to set header on outgoing context ...
}
答案 1 :(得分:2)
你是对的,IInstanceProvider在你的情况下无济于事 - 它仅用于提供服务实例。您的行为不需要无参数构造函数。你需要一个config元素的无参数构造函数,这个类可以使用一些依赖注入类(见下文)来创建行为所需的相应检查器类。
namespace ConsoleApplication4
{
public class MyEndpointBehavior : IEndpointBehavior
{
IClientMessageInspector inspector;
public MyEndpointBehavior(IClientMessageInspector inspector)
{
this.inspector = inspector;
}
public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters)
{
}
public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
{
clientRuntime.MessageInspectors.Add(this.inspector);
}
public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
{
}
public void Validate(ServiceEndpoint endpoint)
{
}
}
public class MyEndpointBehaviorElement : BehaviorExtensionElement
{
public override Type BehaviorType
{
get { return typeof(MyEndpointBehavior); }
}
protected override object CreateBehavior()
{
return new MyEndpointBehavior(ClientInspectorFactory.GetClientInspector());
}
}
public class MyClientInspector : IClientMessageInspector
{
public MyClientInspector()
{
}
public void AfterReceiveReply(ref Message reply, object correlationState)
{
Console.WriteLine("AfterReceiveReply");
}
public object BeforeSendRequest(ref Message request, IClientChannel channel)
{
Console.WriteLine("BeforeSendRequest");
return null;
}
}
public static class ClientInspectorFactory
{
static IClientMessageInspector instance;
public static IClientMessageInspector GetClientInspector()
{
if (instance == null)
{
instance = new MyClientInspector();
}
return instance;
}
}
[ServiceContract]
public interface ITest
{
[OperationContract]
int Add(int x, int y);
}
public class Service : ITest
{
public int Add(int x, int y) { return x + y; }
}
class Program
{
static void Main(string[] args)
{
ServiceHost host = new ServiceHost(typeof(Service));
host.Open();
Console.WriteLine("Host opened");
ChannelFactory<ITest> factory = new ChannelFactory<ITest>("client1");
ITest proxy = factory.CreateChannel();
Console.WriteLine(proxy.Add(3, 4));
((IClientChannel)proxy).Close();
factory.Close();
factory = new ChannelFactory<ITest>("client2");
proxy = factory.CreateChannel();
Console.WriteLine(proxy.Add(5, 8));
((IClientChannel)proxy).Close();
factory.Close();
host.Close();
}
}
}
答案 2 :(得分:0)
我喜欢@carlosfigueira和@drew提供的答案,但我最终想出了一个稍微不同的方法。我选择配置我的IEndpointBehavior PROGRAMMATICY,vs via config。使事情变得简单得多。我更改了我的端点行为以存储我的客户端消息检查器,如下所示:
public class MyEndpointBehavior : IEndpointBehavior
{
private MyClientMessageInspector_myClientMessageInspector;
public MyClientMessageInspector MyClientMessageInspector
{
get
{
if (_myClientMessageInspector == null)
{
_myClientMessageInspector = new MyClientMessageInspector();
}
return _myClientMessageInspector;
}
}
public void AddBindingParameters(ServiceEndpoint endpoint, System.ServiceModel.Channels.BindingParameterCollection bindingParameters)
{
}
public void ApplyClientBehavior(ServiceEndpoint endpoint, System.ServiceModel.Dispatcher.ClientRuntime clientRuntime)
{
clientRuntime.MessageInspectors.Add(MyClientMessageInspector);
}
public void ApplyDispatchBehavior(ServiceEndpoint endpoint, System.ServiceModel.Dispatcher.EndpointDispatcher endpointDispatcher)
{
}
public void Validate(ServiceEndpoint endpoint)
{
}
}
然后我简单地在客户端之间共享此行为,如下所示:
var behavior = new MyEndpointBehavior();
client1.Endpoint.Behaviors.Add(behavior);
client2.Endpoint.Behaviors.Add(behavior);
现在两个客户端将共享相同的身份验证cookie。