如何在Web API授权属性中获取请求cookie

在.NET中有两个AuthorizeAttribute类。System.Web.Http命名空间中定义的一个：

namespace System.Web.Http
{
    // Summary:
    //     Specifies the authorization filter that verifies the request's System.Security.Principal.IPrincipal.
    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, Inherited = true, AllowMultiple = true)]
    public class AuthorizeAttribute : AuthorizationFilterAttribute
    {
        // Summary:
        //     Initializes a new instance of the System.Web.Http.AuthorizeAttribute class.
        public AuthorizeAttribute();
        // Summary:
        //     Gets or sets the authorized roles.
        //
        // Returns:
        //     The roles string.
        public string Roles { get; set; }
        //
        // Summary:
        //     Gets a unique identifier for this attribute.
        //
        // Returns:
        //     A unique identifier for this attribute.
        public override object TypeId { get; }
        //
        // Summary:
        //     Gets or sets the authorized users.
        //
        // Returns:
        //     The users string.
        public string Users { get; set; }
        // Summary:
        //     Processes requests that fail authorization.
        //
        // Parameters:
        //   actionContext:
        //     The context.
        protected virtual void HandleUnauthorizedRequest(HttpActionContext actionContext);
        //
        // Summary:
        //     Indicates whether the specified control is authorized.
        //
        // Parameters:
        //   actionContext:
        //     The context.
        //
        // Returns:
        //     true if the control is authorized; otherwise, false.
        protected virtual bool IsAuthorized(HttpActionContext actionContext);
        //
        // Summary:
        //     Calls when an action is being authorized.
        //
        // Parameters:
        //   actionContext:
        //     The context.
        //
        // Exceptions:
        //   System.ArgumentNullException:
        //     The context parameter is null.
        public override void OnAuthorization(HttpActionContext actionContext);
    }
}

System.Web.Mvc命名空间中定义的另一个：

namespace System.Web.Mvc
{
    // Summary:
    //     Specifies that access to a controller or action method is restricted to users
    //     who meet the authorization requirement.
    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, Inherited = true, AllowMultiple = true)]
    public class AuthorizeAttribute : FilterAttribute, IAuthorizationFilter
    {
        // Summary:
        //     Initializes a new instance of the System.Web.Mvc.AuthorizeAttribute class.
        public AuthorizeAttribute();
        // Summary:
        //     Gets or sets the user roles that are authorized to access the controller
        //     or action method.
        //
        // Returns:
        //     The user roles that are authorized to access the controller or action method.
        public string Roles { get; set; }
        //
        // Summary:
        //     Gets the unique identifier for this attribute.
        //
        // Returns:
        //     The unique identifier for this attribute.
        public override object TypeId { get; }
        //
        // Summary:
        //     Gets or sets the users that are authorized to access the controller or action
        //     method.
        //
        // Returns:
        //     The users that are authorized to access the controller or action method.
        public string Users { get; set; }
        // Summary:
        //     When overridden, provides an entry point for custom authorization checks.
        //
        // Parameters:
        //   httpContext:
        //     The HTTP context, which encapsulates all HTTP-specific information about
        //     an individual HTTP request.
        //
        // Returns:
        //     true if the user is authorized; otherwise, false.
        //
        // Exceptions:
        //   System.ArgumentNullException:
        //     The httpContext parameter is null.
        protected virtual bool AuthorizeCore(HttpContextBase httpContext);
        //
        // Summary:
        //     Processes HTTP requests that fail authorization.
        //
        // Parameters:
        //   filterContext:
        //     Encapsulates the information for using System.Web.Mvc.AuthorizeAttribute.
        //     The filterContext object contains the controller, HTTP context, request context,
        //     action result, and route data.
        protected virtual void HandleUnauthorizedRequest(AuthorizationContext filterContext);
        //
        // Summary:
        //     Called when a process requests authorization.
        //
        // Parameters:
        //   filterContext:
        //     The filter context, which encapsulates information for using System.Web.Mvc.AuthorizeAttribute.
        //
        // Exceptions:
        //   System.ArgumentNullException:
        //     The filterContext parameter is null.
        public virtual void OnAuthorization(AuthorizationContext filterContext);
        //
        // Summary:
        //     Called when the caching module requests authorization.
        //
        // Parameters:
        //   httpContext:
        //     The HTTP context, which encapsulates all HTTP-specific information about
        //     an individual HTTP request.
        //
        // Returns:
        //     A reference to the validation status.
        //
        // Exceptions:
        //   System.ArgumentNullException:
        //     The httpContext parameter is null.
        protected virtual HttpValidationStatus OnCacheAuthorization(HttpContextBase httpContext);
    }
}

这两者之间的主要区别是：

• Web API可以使用System.Web.Http版本
• System.Web.Mvc版本可用于ASP.NET MVC
• Http版本使用OnAuthorization方法中的HttpActionContext参数类型，而Mvc版本使用AuthorizationContext类型

我想访问AuthorizeAttribute的Http版本中的请求cookie。在Mvc版本中，其实现方式如下：

public class Foo : AuthorizeAttribute
{
     public override void OnAuthorization(AuthorizationContext filterContext) 
     {
          HttpCookie cookie = filterContext.HttpContext.Request.Cookies.Get("Bar");    
     }
}

有人知道我如何用HttpActionContext做同样的事情吗？有可能吗？如果不可能，为什么会这样？

public class Foo : AuthorizeAttribute
{
    public override void OnAuthorization(HttpActionContext actionContext)
    {
        var cookie = actionContext.Request.Headers.GetCookies("Bar").FirstOrDefault();
    }
}

string sessionId = "";
CookieHeaderValue cookie = Request.Headers.GetCookies("bar").FirstOrDefault();
if (cookie != null)
{
    sessionId = cookie["bar"].Value;
}

public class Foo : AuthorizeAttribute
{
      public override void OnAuthorization(HttpActionContext actionContext)
      {
           var cookies = actionContext.Request.Headers.GetCookies("Bar").FirstOrDefault();
           var cookie = cookies["Bar"];
      }
}