AuthorizeAttribute使用角色而不是硬编码的角色值

问题描述

是否有可能添加的角色而不是硬编码值，如：

Is it possible to add the Roles but not hard-coding the values like:

[Authorize(Roles="members, admin")]

我想在那里我不会需要重新构建应用程序，如果我需要添加/删除角色的控制器动作从数据库中检索或配置文件中的这些角色。

I would like to retrieve these roles from a database or configuration file where I wouldn't need to rebuild the application if I needed to add/remove Roles for a Controller Action.

我知道用它可以做枚举...
http://www.vivienchevallier.com/Articles/create-a-custom-authorizeattribute-that-accepts-parameters-of-type-enum
但即使这样仍不能满足我的需求足够的灵活性;它仍然是一个有点硬code的，即使它是清洁的。

I know with the enums it can be done...http://www.vivienchevallier.com/Articles/create-a-custom-authorizeattribute-that-accepts-parameters-of-type-enumbut even this is still not flexible enough for my needs; it's still somewhat of a hard-code, even though it is cleaner.

推荐答案

您可以创建自定义的授权属性，这会比较用户角色和角色从配置。

You can create your custom authorization attribute, that will compare user roles and roles from your configuration.

public class ConfigAuthorizationAttribute: AuthorizeAttribute
{
    private readonly IActionRoleConfigService configService;
    private readonly IUserRoleService roleService;

    private string actionName;

    public ConfigAuthorizationAttribute()
    {
        configService = new ActionRoleConfigService();
        roleService = new UserRoleService();
    }

    protected override void OnAuthorization(AuthorizationContext filterContext)
    {
        actionName = filterContext.ActionDescription.ActionName;
        base.OnAuthorization(filterContext);
    }

    protected override bool AuthorizeCore(HttpContextBase httpContext)
    {
        var availableRoles = configService.GetActionRoles(actionName); // return list of strings
        var userName = httpContext.User.Identity.Name;
        var userRoles = roleService.GetUserRoles(userName); // return list of strings
        return availableRoles.Any(x => userRoles.Contains(x));
    }
}

我希望它可以帮助你。

I hope it helps you.

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