如何对角色和特定用户使用自定义Authorize属性？ [英] How to use custom Authorize attribute for roles as well as a specific user?

问题描述

所以我有我的操作方法

[Authorize(Roles="Admin")]
public ActionResult EditPosts(int id)
{
    return View();
}

就我而言，我需要授权管理员，以便他们可以编辑帖子，但是（此处来了很酷的部分），我还需要允许帖子的创建者能够编辑普通用户的帖子。那么，我该如何过滤掉创建帖子的用户以及管理员，却让其他人未经授权？我正在接收PostEntry id作为路由参数，但是在属性和属性之后，它们仅接受常量参数，看起来很困难，您的回答受到高度评价，干杯！

In my case i need to authorize administrators so they can edit posts but (here comes the cool part), i also need to allow the creator of the post to be able to edit the post wich is a normal user. So how can i filter out the user that created the post as well as the admins but leave the others unauthorized? I am recieveing the PostEntry id as a route parameter but thats after the atribute and also attributes only accept constant parameters, looks like something very difficult, your answers are highly appreciated, Cheers!

推荐答案

您可以编写自定义授权属性：

You could write a custom authorize attribute:

public class AuthorizeAdminOrOwnerOfPostAttribute : AuthorizeAttribute
{
    protected override bool AuthorizeCore(HttpContextBase httpContext)
    {
        var authorized = base.AuthorizeCore(httpContext);
        if (!authorized)
        {
            // The user is not authenticated
            return false;
        }

        var user = httpContext.User;
        if (user.IsInRole("Admin"))
        {
            // Administrator => let him in
            return true;
        }

        var rd = httpContext.Request.RequestContext.RouteData;
        var id = rd.Values["id"] as string;
        if (string.IsNullOrEmpty(id))
        {
            // No id was specified => we do not allow access
            return false;
        }

        return IsOwnerOfPost(user.Identity.Name, id);
    }

    private bool IsOwnerOfPost(string username, string postId)
    {
        // TODO: you know what to do here
        throw new NotImplementedException();
    }
}

，然后用它来装饰控制器动作：

and then decorate your controller action with it:

[AuthorizeAdminOrOwnerOfPost]
public ActionResult EditPosts(int id)
{
    return View();
}

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