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Looking for a HTML / CSS image trick

 
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Burningmace
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PostPosted: Sun Oct 17, 2010 12:04 pm    Post subject: Looking for a HTML / CSS image trick Reply with quote

I'm coding something that acts as a web server as part of its functionality, and I'm using embedded base64 images to make my job easier. For example:
<img src="data:image/gif;base64,R0lGODlhEAAQAHAAACH5BAEAANgALAAAAAAQABAAhwAAAAAAMwAAZgAAmQAAzAAA/wArAAArMwArZgArmQArzAAr/wBVAABVMwBV...... " />

The problem is that in certain circumstances that image needs to be used in about 12,000 places in the document. In that case I end up with a page size exceeding 20MB, which is obviously unacceptable.

I know I could place the embedded image in a single span element and duplicate it on the client side using JavaScript, but I'd much rather use CSS or HTML to do it since JS isn't always enabled.

Any ideas?

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justa_dude
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PostPosted: Sun Oct 17, 2010 2:42 pm    Post subject: Reply with quote

I can't recant any CSS trickery, but if the problem is related to your difficulty handling multiple document requests then you could always host the image on a different server.
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AhMunRa
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PostPosted: Mon Oct 18, 2010 12:26 pm    Post subject: Reply with quote

Wow, this reminds me of an IE image html exploit. Like you are trying to override a buffer when calling an image to either ddos IE or install something without user interaction as the user running IE.
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atom0s
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PostPosted: Mon Oct 18, 2010 5:19 pm    Post subject: Reply with quote

The trick should work with CSS too:
http://www.websiteoptimization.com/speed/tweak/inline-images/

CSS will cache the image so it should be reused rather then redownloaded each use.

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Burningmace
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PostPosted: Sat Oct 23, 2010 4:05 pm    Post subject: Reply with quote

Wiccaan wrote:
The trick should work with CSS too:
http://www.websiteoptimization.com/speed/tweak/inline-images/

CSS will cache the image so it should be reused rather then redownloaded each use.


Quality stuff! Didn't realise I could specify such data in the Url() pseudo-function.

@AhMunRa - It's just for an app I'm coding that displays the current operational status of the server it's running on, nothing sinister or exploity about it Smile

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AhMunRa
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PostPosted: Mon Oct 25, 2010 9:15 am    Post subject: Reply with quote

No worries, I'm all for the exploity bits too.
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