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copied!<p>You could derive from <a href="http://msdn.microsoft.com/en-us/library/system.web.mvc.authorizeattribute.aspx" rel="nofollow"><code>AuthorizeAttribute</code></a> in order to do your custom authorization stuff and implement <a href="http://msdn.microsoft.com/en-us/library/system.web.mvc.iactionfilter.aspx" rel="nofollow"><code>IActionFilter</code></a> in order to have access to the <a href="http://msdn.microsoft.com/en-us/library/system.web.mvc.iactionfilter.onactionexecuting.aspx" rel="nofollow"><code>OnActionExecuting</code></a> and <a href="http://msdn.microsoft.com/en-us/library/system.web.mvc.iactionfilter.onactionexecuted.aspx" rel="nofollow"><code>OnActionExecuted</code></a> events (to do your custom cleanup code):</p> <pre><code>public class AuthorizeAndCleanupAttribute : AuthorizeAttribute, IActionFilter { protected override bool AuthorizeCore(HttpContextBase httpContext) { // TODO: your custom authorization logic return base.AuthorizeCore(httpContext); } public void OnActionExecuted(ActionExecutedContext filterContext) { // TODO: your custom cleanup code } public void OnActionExecuting(ActionExecutingContext filterContext) { } } </code></pre> <p>Obviously you should be aware that neither the <code>OnActionExecuting</code> or the <code>OnActionExecuted</code> events will ever be executed if the authorization fails (a.k.a. the <code>AuthorizeCore</code> method returns false) so make sure you do your cleanup in this method if you are about to return false.</p>

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