I developed a HTTP module which rewrites URLs using HttpContext.RewritePath.  Today, I added functionality to the module which would change the URL scheme for our site from something like /Wrestling-Shoes.aspx?tabid=69 to /Wrestling/Wrestling-Shoes.aspx?tabid=69.  I have my module working fine, but I receive a DotNetNuke error when I use the URLs where the directory for the page is /Wrestling instead of ~.  The problem is when the PageBase class calls DotNetNuke.Entities.Portals.PortalController.GetCurrentPortalSettings(); that function is returning a Null reference rather than the expected PortalSettings object.  The stack trace for the error is at the bottom of this post.

Here are my questions:

• Why would HttpContext.Items("PortalSettings") be a null reference just because the directory changed?  The tabid for the page hasn't changed at all and when I call RewritePath(), I've tried to pass in "/Default.aspx" and "/Wrestling/Default.aspx" with no luck.  The code would be serving 1 request on 1 thread, so I'm not sure why this would be Null to begin with?
• Where is HttpContext.Items("PortalSettings") set in the code?  I've searched the DotNetNuke.Library and DotNetNuke.HttpModules projects and I can't find the origin of this object.  Maybe if I know when that is set, I can adjust my code?

DotNetNuke.Services.Exceptions.PageLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object.at DotNetNuke.Services.Localization.Localization.GetEnabledLocales() in C:\Inetpub\Dnn4\Dnn490\Library\Components\Localization\Localization.vb:line 924 at DotNetNuke.Framework.PageBase.get_PageCulture() in C:\Inetpub\Dnn4\Dnn490\Library\Components\Framework\PageBase.vb:line 120 at DotNetNuke.Framework.PageBase.OnInit(EventArgs e) in C:\Inetpub\Dnn4\Dnn490\Library\Components\Framework\PageBase.vb:line 260 at System.Web.UI.Control.InitRecursive(Control namingContainer)at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Hi Bryan,

I forgot to answer your post: did you have a look at the url rewriter code of dnn, bitthebullet or ifinity? they rewrite the tabid as well and must also encounter your behaviour. I haven't dig into this so closely to help you from a coding perspective.

J.

After digging into the URL rewrite module that comes with DNN, I found that you have to enter the additional directories you're using as portal aliases.  So if I wanted to use /Wrestling/Wrestling-Shoes.aspx as my URL, then I need to setup a portal alias for the site of domain.com/Wrestling for the rewrite module to work.