Web api 中多个过滤器的执行顺序

我正在使用最新的web api.

我做注释some具有 3 种不同过滤器属性的控制器。

1 [Authorize]
2 [RessourceOwnerAttribute derived from AuthorizationFilterAttribute]
3 [InvalidModelStateAttribute derived from ActionFilterAttribute]

我无法确定过滤器是否按照从上到下声明的顺序运行。

如何定义执行顺序web api 2.1 ?

https://aspnetwebstack.codeplex.com/workitem/1065# https://aspnetwebstack.codeplex.com/workitem/1065#

http://aspnet.uservoice.com/forums/147201-asp-net-web-api/suggestions/3346720-execution-order-of-mvc4-webapi-action-filters http://aspnet.uservoice.com/forums/147201-asp-net-web-api/suggestions/3346720-execution-order-of-mvc4-webapi-action-filters

我还需要自己解决这个问题吗？

这里需要注意一些事项：

1. 过滤器按以下顺序执行操作： 全局 定义的过滤器 -> 特定于控制器的过滤器 -> 特定于操作的过滤器。
2. 授权过滤器 -> 操作过滤器 -> 异常 过滤器

3. 现在你似乎提到的问题与 拥有multiple同类过滤器（例如：多个ActionFilterAttribute装饰在 控制器或动作。这种情况不能保证 该顺序基于反射。）。对于这种情况，有一个办法 使用自定义实现在 Web API 中执行此操作System.Web.Http.Filters.IFilterProvider。我尝试过以下方法 并做了一些测试来验证它。看起来效果很好。 您可以尝试一下，看看它是否按您的预期工作。

   // Start clean by replacing with filter provider for global configuration.
   // For these globally added filters we need not do any ordering as filters are 
   // executed in the order they are added to the filter collection
   config.Services.Replace(typeof(IFilterProvider), new System.Web.Http.Filters.ConfigurationFilterProvider());
   
   // Custom action filter provider which does ordering
   config.Services.Add(typeof(IFilterProvider), new OrderedFilterProvider());
   

   ---

   public class OrderedFilterProvider : IFilterProvider
   {
       public IEnumerable<FilterInfo> GetFilters(HttpConfiguration configuration, HttpActionDescriptor actionDescriptor)
       {
           // controller-specific
           IEnumerable<FilterInfo> controllerSpecificFilters = OrderFilters(actionDescriptor.ControllerDescriptor.GetFilters(), FilterScope.Controller);
   
           // action-specific
           IEnumerable<FilterInfo> actionSpecificFilters = OrderFilters(actionDescriptor.GetFilters(), FilterScope.Action);
   
           return controllerSpecificFilters.Concat(actionSpecificFilters);
       }
   
       private IEnumerable<FilterInfo> OrderFilters(IEnumerable<IFilter> filters, FilterScope scope)
       {
           return filters.OfType<IOrderedFilter>()
                           .OrderBy(filter => filter.Order)
                           .Select(instance => new FilterInfo(instance, scope));
       }
   }
   

   ---

   //NOTE: Here I am creating base attributes which you would need to inherit from.
   public interface IOrderedFilter : IFilter
   {
       int Order { get; set; }
   }
   
   public class ActionFilterWithOrderAttribute : ActionFilterAttribute, IOrderedFilter
   {
       public int Order { get; set; }
   }
   
   public class AuthorizationFilterWithOrderAttribute : AuthorizationFilterAttribute, IOrderedFilter
   {
       public int Order { get; set; }
   }
   
   public class ExceptionFilterWithOrderAttribute : ExceptionFilterAttribute, IOrderedFilter
   {
       public int Order { get; set; }
   }