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    <p>Derive your class from AuthorizeAttribute. Override the OnAuthorization method. Add and set up a CacheValidationHandler.</p> <pre><code>public void CacheValidationHandler( HttpContext context, object data, ref HttpValidationStatus validationStatus ) { validationStatus = OnCacheAuthorization( new HttpContextWrapper( context ) ); } public override void OnAuthorization( AuthorizationContext filterContext ) { if (filterContext == null) { throw new ArgumentNullException( "filterContext" ); } if (AuthorizeCore( filterContext.HttpContext )) { ... your custom code ... SetCachePolicy( filterContext ); } else if (!filterContext.HttpContext.User.Identity.IsAuthenticated) { // auth failed, redirect to login page filterContext.Result = new HttpUnauthorizedResult(); } else { ... handle a different case than not authenticated } } protected void SetCachePolicy( AuthorizationContext filterContext ) { // ** IMPORTANT ** // Since we're performing authorization at the action level, the authorization code runs // after the output caching module. In the worst case this could allow an authorized user // to cause the page to be cached, then an unauthorized user would later be served the // cached page. We work around this by telling proxies not to cache the sensitive page, // then we hook our custom authorization code into the caching mechanism so that we have // the final say on whether a page should be served from the cache. HttpCachePolicyBase cachePolicy = filterContext.HttpContext.Response.Cache; cachePolicy.SetProxyMaxAge( new TimeSpan( 0 ) ); cachePolicy.AddValidationCallback( CacheValidationHandler, null /* data */); } </code></pre>
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    1. POasp.net mvc Adding to the AUTHORIZE attribute
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    1. COok, but how exactly can i correctly redirect to last page?
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    2. COHow can I make this work with Roles? It works ok now but seems like roles are not working. Also AuthorizeCore keeps returning false even when the user is Authenticated which means SetCachePolicy() never gets executed.
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      1. USNick Masao
    3. CO@Nick - I've since blogged about improving the cache handling aspects: http://farm-fresh-code.blogspot.com/2011/03/revisiting-custom-authorization-in.html
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