如何在 ASP.NET Core 上显示未授权页面

Question

使用[Authorize] 属性时如何在 ASP.NET Core 上显示错误页面？

政策

services.AddAuthorization(p =>
{
    p.AddPolicy("RequireAdminRole", policy => policy.RequireRole("Admin"));
    p.AddPolicy("RequireTrainerRole", policy => policy.RequireRole("Trainer"));
    p.AddPolicy("RequireTeamLeaderRole", policy => policy.RequireRole("Team Leader"));
    p.AddPolicy("RequireUserRole", policy => policy.RequireRole("User"));
});

控制器

[Authorize(Policy = "RequireAdminRole")]
[Area("Admin")]
public class BaseController : Controller
{
}

Answer 1

如果您使用 cookie 身份验证来保护您的资源，那么您可以使用 AccessDeniedPath 属性重定向到错误页面：

        app.UseCookieAuthentication(new CookieAuthenticationOptions
        {
            AccessDeniedPath = "<path>"
        });

否则你可以使用UseStatusCodePages处理403

app.UseStatusCodePages(new StatusCodePagesOptions()
 {
     HandleAsync = (ctx) =>
     {
          if (ctx.HttpContext.Response.StatusCode == 403)
          {
               //handle
          }

          return Task.FromResult(0);
     }
 });