在 .NET Core 1.0 MVC 的视图中使用授权策略的任何方法？

Question

我知道在控制器中，您可以毫无问题地编写 [Authorize("policyName")]，但是有什么方法可以在视图中使用策略吗？我不想每次都使用 User.IsInRole(...) 我想授权一些 HTML.

编辑：

这是一些代码

Startup.cs -- 政策声明

    services.AddAuthorization(options =>
    {
        options.AddPolicy("testPolicy", policy =>
        {
            policy.RequireAuthenticatedUser()
                  .RequireRole("RoleOne", "RoleTwo", "RoleThree")
                  .RequireClaim(ClaimTypes.Email);
        });
    });

管理员控制器

[Authorize("testPolicy")]
public class AdminController : Controller
{
    public IActionResult Index()
    {
        return View();
    }
}

导航栏HTML

<div class="navbar navbar-inverse navbar-fixed-top">
            <div class="container">
                <div class="navbar-collapse collapse">
                    <ul class="nav navbar-nav">
                        <li><a asp-controller="Home" asp-action="Index">Home</a></li> 

                        <!-- I want to implement my policy here. -->
                        @if (User.IsInRole("..."))
                        {
                            <li><a asp-controller="Admin" asp-action="Index">Admin</a></li>
                        }
                    </ul>
                    @await Html.PartialAsync("_LoginPartial")
                </div>
            </div>

Answer 1

我发现这个 link 可能有用：https://docs.asp.net/en/latest/security/authorization/views.html

该页面的示例：

@if (await AuthorizationService.AuthorizeAsync(User, "PolicyName"))
{
    <p>This paragraph is displayed because you fulfilled PolicyName.</p>
}

In some cases the resource will be your view model, and you can call AuthorizeAsync in exactly the same way as you would check during resource based authorization;

@if (await AuthorizationService.AuthorizeAsync(User, Model, Operations.Edit))
{
    <p><a class="btn btn-default" role="button"
        href="@Url.Action("Edit", "Document", new {id= Model.Id})">Edit</a></p>
}

Answer 2

我最终创建了一个标签助手来有条件地隐藏与之关联的元素。

[HtmlTargetElement(Attributes = "policy")]
public class PolicyTagHelper : TagHelper
{
    private readonly IAuthorizationService _authService;
    private readonly ClaimsPrincipal _principal;

    public PolicyTagHelper(IAuthorizationService authService, IHttpContextAccessor httpContextAccessor)
    {
        _authService = authService;
        _principal = httpContextAccessor.HttpContext.User;
    }

    public string Policy { get; set; }

    public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
    {
        // if (!await _authService.AuthorizeAsync(_principal, Policy)) ASP.NET Core 1.x
        if (!(await _authService.AuthorizeAsync(_principal, Policy)).Succeeded)
            output.SuppressOutput();
    }
}

用法

<li policy="testPolicy"><a asp-controller="Admin" asp-action="Index">Admin</a></li>

Answer 3

这是 ASP Core 中的重大改进之一，您可以将标识注入启动文件中的所有页面：

@if (User.IsInRole("Admin"))
{
    <p>
    <a asp-action="Create" asp-controller="MyController">Create New</a>
</p>
}

在Startup.cs中：

 services.AddIdentity<ApplicationUser, IdentityRole>()

编辑：好吧，我误读了 post，你已经知道了 :) - 如果有人可以使用它，我无论如何都会留下它。

在 .NET Core 1.0 MVC 的视图中使用授权策略的任何方法？

Any way to use Authorization Policies in a view in .NET Core 1.0 MVC?

asp.net

asp.net-mvc

authorization

asp.net-core-mvc

asp.net-core