The Error

For those of you who have tried to rename your Umbraco installation directory to something other than the default /umbraco/ you'll have found that TreeInit.aspx throws a JavaScript error along the lines of:

Message: Object expected
Line: 1
Char: 4236
Code: 0
URI: http://www.yourdomain.co.uk/youradmindirector/js/xloadtree.js

As this only really affects the refresh of the tree/close of a couple of dialogues I've not bothered fixing it but basically the issue is outlined well here: http://tinyurl.com/cx9atv

The Fix

If you're using extension less URLs already then it's easy as pie to sort:

1. Open your UrlRewriting config file (/config/UrlRewriting.config)
2. Add this above "</rewrites>":

<...>

<add name="missingjs" 
    virtualUrl="^~/## YOUR ADMIN DIRECTORY GOES HERE ##_client/ui/(.*).js" 
    rewriteUrlParameter="ExcludeFromClientQueryString" 
    destinationUrl="~/umbraco_client/ui/$1.js" 
    ignoreCase="true" />

If you've not already using extension less URLs don't panic, that's easy to setup you can read all about it here. Alternatively you could just copy the js files from one folder to another ;)

The Why

I don't know how many people already rename their admin dir from something else but as Umbraco becomes a more popular choice of CMS you really should consider hiding the folder (the more popular it becomes, the more people will become more familiar with the default admin directory of /umbraco/).

Although there hasn't yet been a breach (AFAIAA) if a vulnerability is found, the first step in prevention is obfuscation -hide your admin directory! A quick Google search will show you how easy some developers have made it for you to find their admin sites.

This came through in my email today and it made me smile:

Ok it might be a little less than half side but it's near enough. I've been sitting on this for a while and needed to reference it for someone so I thought I'd post quickly about it. One of the most common complaints about .Net is that you have a lot of hidden "content" by the way of hidden inputs and the likes throughout your site. This can easily get corrupt on postback/slowdown the page load times etc.

Really you should be optimising each control on the page (enabling/disabling where relevant) but if you want to cheat (lets face it, we all do):

1. Download the files: PageStateAdapterv1.0.zip (3KB)
2. Put PageStateAdapter.browser into your /App_Browsers/ folder (or create one and add it)
3. Put TSDPageStateAdapter.dll into your website's /bin/ folder
4. Load up your website and checkout your ViewState :)

Incase you're interested in the source for it:

PageStateAdapter.browser

<browsers>
    <browser refID="Default">
        <controlAdapters>
            <adapter controlType="System.Web.UI.Page" adapterType="TheSiteDoctor.PageStateAdapter.PageStateAdapter" />
        </controlAdapters>
        <capabilities>
            <capability name="requiresControlStateInSession" value="true" />
        </capabilities>
    </browser>
</browsers>

PageStateAdapter.cs

using System.Web.UI;

namespace TheSiteDoctor.PageStateAdapter

{...}

{
    public class PageStateAdapter : System.Web.UI.Adapters.PageAdapter

    {...}

    {
        public override PageStatePersister GetStatePersister()

        {...}

        {
            return new SessionPageStatePersister(this.Page);
        }

    }

}

The best example of how much this reduces ViewState by is when you add a large DataGrid to your site.

Post files: PageStateAdapterv1.0.zip (3KB)

Update: Apologies to those of you who downloaded and found it wouldn't compile, the .browser file was a little off (missing the second "PageStateAdapter"). I've updated it and changed the zip file download. Enjoy!