About the author

Miron Abramson
Software Engineer,
CTO at PixeliT
and .NET addicted for long time.
Open source projects:
MbCompression - Compression library

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The opinions expressed herein are my own personal opinions and do not represent my employer's view in anyway.

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Update to my compression module to compress third party scripts

My last version of the compression module was working great and able to compress and cache pages, WebResources, CSS and JavaScripts files. It have one problem (that similiar to most of the compression modules you can find). To compress the javascripts files, you have to modify the way you register them and change their links to something like that: 

<script type="text/javascript" src="/Scripts/utils.js">

needs to became 

<script type="text/javascript" src="Scripts/jslib.axd?d=~/Scripts/utils.js">

It is not so hard work to do, but it became useless when you use third party controls as 'Telerik' (RadControls)  and force it to doesn't use it's scripts as WebResources. In such case, the controls 'Injects' their scripts links into the HTML code and you can't modify them as needed to let the compression handler to compress it.  In the new version of my compression component, I added a ResponseFilter that parse the Scripts links in the HTML and convert them into 'compressable' links. By default, this option is disabled in the compression module. To enable it (if you use such third party controls), just add the attribute compressThirdParityScripts="true" to the compression configuration.

Full implementation instructions can be found here: Compression module implementation 

Latest code can be downloaded from: http://www.codeplex.com/MbCompression

Currently rated 4.8 by 5 people

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Posted by Miron on Friday, February 22, 2008 4:15 AM
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Remove white spaces using HttpModule

Few weeks ago, Mads Kristens poseted a very usefull post about removing white spaces from your pages. For me, he found the best Regular Expression for this job.  He was using the Render method to do it, and it means that if you want to use it in existing site, you need to edit your base page and compile your site again.

I wanted to use it in some sites I have/manage, so I just insert his code into a new ResponseFilter and assign this filter in my Compression component, compile again this dll and replace it in all my sites. Importent thing is, that using this 'remove spaces metho' must folows the rule of that the current request is not made by MS-AJAX component/control, because the ViewState will be corrupted. This check can be easly made by this simple method:

internal static bool IsAjaxPostBackRequest(HttpContext context)
      return context.Request.Headers["X-MicrosoftAjax"] != null;

Also note, that RequestFilters are excuted in order LIFO (the last added filter is the first one to be performed) , so if you use any compression filter (like me), make sure you register the compression filter before this one.

The ResponseFilter code can be download from here:

RemoveWhiteSpaces.cs (2.34 kb)

The compression module with this filter included can be download from this post: Compression component.  In this component you can control in wich pages you want to anable or disable the remove spaces option. (exclude specified pages from compression and remove spaces)

Currently rated 4.0 by 1 people

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Categories: ASP.NET | C# | Server side
Posted by Miron on Thursday, December 27, 2007 1:00 PM
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