如何创建自定义授权属性以检查Asp.Net Core中的角色和URL路径？

Question

我想创建一个自定义授权属性来检查角色和网址路径.

我已经找到了使用基于策略的授权在Asp.Net Core中执行此操作的方法,但我已经尝试实现它,但是我无法使用inclming url获取HttpContext.

AuthorizationHandlerContext 无法访问HttpContext可能.

如何通过url路径获取当前的HttpContext？是可以这样做还是用其他方式？

我已尝试使用此代码创建自定义策略:

public class RoleUrlValidationHandler : AuthorizationHandler<RoleUrlValidationRequirement>
{
    protected override Task HandleRequirementAsync(AuthorizationHandlerContext context, RoleUrlValidationRequirement requirement)
    {           
        var path = //Here I need get current url path for example - /api/posts/4545411
        var pathPart = path.Split('/');
        var clientId = pathPart[3];

        if (context.User.IsInRole(clientId))
        {
            context.Succeed(requirement);
        }

        return Task.CompletedTask;
    }
}

我想创建以下内容:

[Authorize(Policy="RoleUrlValidation")] //Get ClientId from Url and check User's roles
public class PostsController : Controller
{
    public ActionResult Get()
    {
    }
}

Answer 1

政策方针是正确的.只有你错过的是,你可以在处理程序中使用依赖注入.

public class RoleUrlValidationHandler : AuthorizationHandler<RoleUrlValidationRequirement>
{
    private readonly IHttpContextAccessor contextAccessor;
    public class RoleUrlValidationHandler(IHttpContextAccessor contextAccessor)
    {
        this.contextAccessor = contextAccessor;
    }

    protected override Task HandleRequirementAsync(AuthorizationHandlerContext context, RoleUrlValidationRequirement requirement)
    {
        var httpContext = contextAccessor.HttpContext;
        var path = httpContext.Request.Path;
        var pathPart = path.Split('/');
        var clientId = pathPart[3];

        if (context.User.IsInRole(clientId))
        {
            context.Succeed(requirement);
        }

        return Task.CompletedTask;
    }
}

您也可能必须IHttpContextAccessor注册默认情况下未注册.

services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();

额外位:

考虑使用var routeData = httpContext.GetRouteData()而不是path.Split('/')用于从中读取值,以便您可以轻松地从路径中读取参数值.