如何获取路由属性 dotnet core 3? [英] How can I get route attributes dotnet core 3?

问题描述

我已将 dotnet core 2.2 升级到 3.preview 7.
所以在那之后，我无法获得自定义属性.
context.Resource 在版本 2.2 中是 AuthorizationFilterContext 的类型，但在版本 3 中是 Microsoft.AspNetCore.Http.Endpoint 的类型.

I have upgraded dotnet core 2.2 to 3.preview 7.
So after that, I can't get custom attributes.
context.Resource in version 2.2 was type of AuthorizationFilterContext, but in version 3 is type of Microsoft.AspNetCore.Http.Endpoint.

现在我无法从端点获取属性.

Now I couldn't get attributes from endpoint.

using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc.Controllers;
using Microsoft.AspNetCore.Mvc.Filters;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Threading.Tasks;

namespace Gamma.Core.Security
{
    public abstract class AttributeAuthorizationHandler<TRequirement,     TAttribute>
    : AuthorizationHandler<TRequirement> where TRequirement
    : IAuthorizationRequirement where TAttribute : Attribute
    {
        Microsoft.AspNetCore.Http.IHttpContextAccessor _httpContextAccessor = null;
        public AttributeAuthorizationHandler(Microsoft.AspNetCore.Http.IHttpContextAccessor httpContextAccessor)
        {
            _httpContextAccessor = httpContextAccessor;
        }
        protected override Task HandleRequirementAsync(AuthorizationHandlerContext context, TRequirement requirement)
        {
            var attributes = new List<TAttribute>();

            var action = (context.Resource as AuthorizationFilterContext)?.ActionDescriptor as ControllerActionDescriptor;
            if (context.Resource is Microsoft.AspNetCore.Http.Endpoint endpoint)
            {
                //endpoint.
            }

            if (action != null)
            {
                attributes.AddRange(GetAttributes(action.MethodInfo));
            }

            return HandleRequirementAsync(context, requirement, attributes);
        }

        protected abstract Task HandleRequirementAsync(AuthorizationHandlerContext context, TRequirement requirement, IEnumerable<TAttribute> attributes);

        private static IEnumerable<TAttribute> GetAttributes(MemberInfo memberInfo)
        {
            return memberInfo.GetCustomAttributes(typeof(TAttribute), false).Cast<TAttribute>();
        }
    }
}

推荐答案

我能够在 AuthorizationHandlerContext 中使用 ControllerActionDescriptor 在 布莱恩的回答.

I was able to get custom attributes in .NET Core 3.1 from AuthorizationHandlerContext using ControllerActionDescriptor in Brian's answer.

private IEnumerable<TAttribute> GetAttributes<TAttribute>(AuthorizationHandlerContext authContext)
{
    if (authContext.Resource is RouteEndpoint routeEndpoint)
    {
        var actionDescriptor = routeEndpoint.Metadata.OfType<ControllerActionDescriptor>().SingleOrDefault();
        var attributes = actionDescriptor?.MethodInfo.GetCustomAttributes(typeof(TAttribute), false).Cast<TAttribute>();
        return attributes;
    }
    
    return null;
}

这篇关于如何获取路由属性 dotnet core 3?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！