基于路由值的全局资源授权

Question

我正在开发 ASP.Net Core 3.1 网络 API。

API 个用户来自 Azure AD。用户如果有许可证就可以访问API，每个用户可以分配给多个许可证，同一个许可证可以分配给多个用户。

客户希望我使用 <api_url>/{licenseId}/controller/action.

这样的模板构建 API 路由

我的控制器是这样的：

[Authorize]
[Route("{licenseId}/Foo")]
public class FooController : ControllerBase
{

如果我将许可证视为一种资源，我可以使用详述的基于资源的授权here。它有效，但我发现自己复制并粘贴了所有操作的身份验证检查。

有没有更好的方法来使用路由值授权用户？

到目前为止我得到的是：

public class LicenseRequirement : IAuthorizationRequirement
{        
    public Guid LicenseId { get; private set; }

    public LicenseRequirement(Guid licenseId)
    {
        LicenseId = licenseId;
    }
}

public class LicenseAuthorizationHandler : AuthorizationHandler<LicenseRequirement>
{
    private readonly IHttpContextAccessor _httpContextAccessor;
    private readonly ILogger<LicenseAuthorizationHandler> _logger;
    private readonly DBContext _db;

    public LicenseAuthorizationHandler(DBContext context, ILogger<LicenseAuthorizationHandler> logger, IHttpContextAccessor httpContextAccessor)
    {
        _logger = logger;
        _db = context;
        _httpContextAccessor = httpContextAccessor;
    }

    protected override async Task HandleRequirementAsync(AuthorizationHandlerContext context, LicenseRequirement requirement)
    {
        var userId = new Guid(context.User.GetUserId());
        var licenseId = _httpContextAccessor.HttpContext.GetRouteData().Values["licenseId"];

        if (await _db.ApiUsers.SingleOrDefaultAsync(x => x.LicenseId == new Guid(licenseId as string) && x.UserId == userId) is ApiUser user)
            context.Succeed(requirement);
    }
}

现在我有点卡住了，因为我不知道如何在 Startup.cs 中设置它并将其用作属性或区域过滤器，在运行时使用 licenseId 创建这些要求路线的价值。

Answer 1

我发现 IAuthorizationFilter 实施起来非常简单。当我昨天尝试时，我找不到 RouteValues 但它们在那里：

public class LicenseAuthorizationFilter : IAuthorizationFilter
{
    private readonly ILogger<LicenseAuthorizationFilter> _logger;
    private readonly DBContext _db;

    public LicenseAuthorizationFilter(DBContext context, ILogger<LicenseAuthorizationFilter> logger)
    {
        _logger = logger;
        _db = context;
    }

    public void OnAuthorization(AuthorizationFilterContext context)
    {
        var userId = new Guid(context.HttpContext.User.GetUserId());
        var licenseId = new Guid(context.HttpContext.Request.RouteValues["licenseId"] as string);

        if (!(_db.ApiUsers.SingleOrDefault(x => x.LicenseId == licenseId && x.UserId == userId) is ApiUser user))
        {
            context.Result = new ForbidResult();
        }
    }
}

public class LicenseAuthorizationAttribute : TypeFilterAttribute
{
    public LicenseAuthorizationAttribute() : base(typeof(LicenseAuthorizationFilter))
    { }
}

控制器可以巧妙地变成：

[Authorize]
[LicenseAuthorization]
[Route("{licenseId}/Items")]
public class ItemsController : ControllerBase
{
    [...]
}

基于路由值的全局资源授权

Global Resource Authorization based on route value

c#

asp.net-core

routes

asp.net-core-webapi

asp.net-authorization