backend/ExamKing.WebApp.Student/Security/Handlers/JwtHandler.cs

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using System.Threading.Tasks;
using Furion;
using Furion.Authorization;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.DependencyInjection;

namespace ExamKing.WebApp.Student
{
    /// <summary>
    /// JWT 授权自定义处理程序
    /// </summary>
    public class JwtHandler : AppAuthorizeHandler
    {
        /// <summary>
        /// 请求管道
        /// </summary>
        /// <param name="context"></param>
        /// <param name="httpContext"></param>
        /// <returns></returns>
        public override Task<bool> PipelineAsync(AuthorizationHandlerContext context, DefaultHttpContext httpContext)
        {
            // 此处已经自动验证 Jwt token的有效性了，无需手动验证

            // 检查权限，如果方法时异步的就不用 Task.FromResult 包裹，直接使用 async/await 即可
            return Task.FromResult(CheckAuthorzie(httpContext));
        }

        /// <summary>
        /// 检查权限
        /// </summary>
        /// <param name="httpContext"></param>
        /// <returns></returns>
        private static bool CheckAuthorzie(DefaultHttpContext httpContext)
        {
            // 获取权限特性
            var securityDefineAttribute = httpContext.GetMetadata<SecurityDefineAttribute>();
            if (securityDefineAttribute == null) return true;

            // 解析服务
            var authorizationManager = httpContext.RequestServices.GetService<IAuthorizationManager>();

            // 检查授权
            return App.GetService<IAuthorizationManager>().CheckSecurity(securityDefineAttribute.ResourceId);
        }
    }
}