asp.net-mvc - “Security aware” Action 链接？

Question

如何创建一个“安全意识”操作链接，以检测用户是否有权单击(调用)该操作？
如果不允许用户使用该操作，则隐藏链接...

取决于

web.config(授权)和

[授权]操作

上的属性

聚苯乙烯
我猜这是不好的做法，将这两个MVC混合在一起？

Answer 1

这是从MvcSitemap项目中窃取的一些代码，并已修改为我自己使用。如果我没记错的话，此代码已针对MVC2进行了修改，并且某些功能可能必须反向移植到MVC1。

将MVC和FormsAuthentication混合在一起完全不是坏习惯，MVC的默认身份验证方法围绕现有的Asp.net安全基础结构构建。

用于确定用户是否具有权限的代码:

public static class SecurityTrimmingExtensions 
{

    public static bool HasActionPermission( this HtmlHelper htmlHelper, string actionName, string controllerName )
    {
        //if the controller name is empty the ASP.NET convention is:
        //"we are linking to a different controller
        ControllerBase controllerToLinkTo = string.IsNullOrEmpty(controllerName) 
                                                ? htmlHelper.ViewContext.Controller
                                                : GetControllerByName(htmlHelper, controllerName);

        var controllerContext = new ControllerContext(htmlHelper.ViewContext.RequestContext, controllerToLinkTo);

        var controllerDescriptor = new ReflectedControllerDescriptor(controllerToLinkTo.GetType());

        var actionDescriptor = controllerDescriptor.FindAction(controllerContext, actionName);

        return ActionIsAuthorized(controllerContext, actionDescriptor);
    }


    private static bool ActionIsAuthorized(ControllerContext controllerContext, ActionDescriptor actionDescriptor)
    {
        if (actionDescriptor == null)
            return false; // action does not exist so say yes - should we authorise this?!

        AuthorizationContext authContext = new AuthorizationContext(controllerContext);

        // run each auth filter until on fails
        // performance could be improved by some caching
        foreach (IAuthorizationFilter authFilter in actionDescriptor.GetFilters().AuthorizationFilters)
        {
            authFilter.OnAuthorization(authContext);

            if (authContext.Result != null)
                return false;
        }

        return true;
    }

    private static ControllerBase GetControllerByName(HtmlHelper helper, string controllerName)
    {
        // Instantiate the controller and call Execute
        IControllerFactory factory = ControllerBuilder.Current.GetControllerFactory();

        IController controller = factory.CreateController(helper.ViewContext.RequestContext, controllerName);

        if (controller == null)
        {
            throw new InvalidOperationException(

                String.Format(
                    CultureInfo.CurrentUICulture,
                    "Controller factory {0} controller {1} returned null",
                    factory.GetType(),
                    controllerName));

        }

        return (ControllerBase)controller;
    }

}

HTML帮助程序

public static class SecurityTrimmedLink
{
    public static MvcHtmlString SecurityTrimmedActionLink(this HtmlHelper htmlHelper, string linkName, string actionName)
    {
        return htmlHelper.HasActionPermission(actionName, "")
                   ? htmlHelper.ActionLink(linkName, actionName)
                   : MvcHtmlString.Create("");
    }        

    public static MvcHtmlString SecurityTrimmedActionLink(this HtmlHelper htmlHelper, string linkName, string actionName, RouteValueDictionary routeValueDictionary )
    {
        return htmlHelper.HasActionPermission(actionName, "")
                   ? htmlHelper.ActionLink(linkName, actionName, routeValueDictionary)
                   : MvcHtmlString.Create("");
    }

    public static MvcHtmlString SecurityTrimmedActionLink(this HtmlHelper htmlHelper, string linkName, string actionName, object routeValues, object htmlAttributes )
    {
        return htmlHelper.HasActionPermission(actionName, "")
                   ? htmlHelper.ActionLink(linkName, actionName, routeValues, htmlAttributes)
                   : MvcHtmlString.Create("");
    }

    public static MvcHtmlString SecurityTrimmedActionLink(this HtmlHelper htmlHelper, string linkName, string actionName, string controllerName)
    {
        return htmlHelper.HasActionPermission(actionName, controllerName)
                   ? htmlHelper.ActionLink(linkName, actionName, controllerName)
                   : MvcHtmlString.Create("");
    }

    public static MvcHtmlString SecurityTrimmedActionLink(this HtmlHelper htmlHelper, string linkName, string actionName, string controllerName, object routeValues, object htmlAttributes)
    {
        return htmlHelper.HasActionPermission(actionName, controllerName)
                   ? htmlHelper.ActionLink(linkName, actionName, controllerName, routeValues, htmlAttributes)
                   : MvcHtmlString.Create("");
    }
}

警告:这在MVC 5中不起作用，因为对FindAction()的调用从不返回操作描述符

我试图找到问题，但是找不到并最终编写了解决方案。 :(