“安全意识"动作链接? [英] "Security aware" action link?

问题描述

如何创建安全感知"操作链接以检测用户是否有权单击(调用)操作?
如果不允许用户使用该操作，则隐藏链接...

How can I create a "security aware" action link that detects if a user is authorized to click (invoke) the action?
Hide link if user is not allowed to use that action...

取决于

• web.config(授权)和
• [授权] 操作的属性

PS
我想在 MVC 中混合这两个是不好的做法?

PS
I guess it is bad practice to mix those 2 in MVC?

推荐答案

这是从 MvcSitemap 项目中挖出并修改为我自己使用的一些代码.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向后移植到 MVC1.

This is some code poached from the MvcSitemap project and modified for my own use. If I remember correctly this code has been modified for MVC2 and some of the functions might have to be back ported to 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是围绕现有的 Asp.net 安全基础架构构建的.

Its not bad practices at all to mix MVC and FormsAuthentication together, MVC's default authentication methods are build around the existing Asp.net security infrastructure.

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 Helpers

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() 的调用从不返回动作描述符

我试图找到问题，但无法解决，最终编写了一个变通方法.:(

I tried to find the issue and couldn't and ended up programming a work around. :(

这篇关于“安全意识"动作链接?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！