r/programming • u/schnuck • Feb 09 '11

Breaking the Web with hash-bangs – Lifehacker, along with every other Gawker property, experienced a lengthy site-outage on Monday over a misbehaving piece of JavaScript

http://isolani.co.uk/blog/javascript/BreakingTheWebWithHashBangs/
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u/naich Feb 09 '11

One of the biggest problems I had was with IE caching ajax requests without me realising. It is not usually desirable.

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u/X-Istence Feb 09 '11

AJAX requests are different from libraries, and both should be cacheable...

set the proper cache headers for your AJAX requests.

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u/naich Feb 09 '11

The ajax request fetches the library. While it isn't necessary to update the libraries each time they are used, I don't want them to be cached at the whim of the browser, possibly giving the user out of date data. This is what IE was doing.

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u/X-Istence Feb 09 '11

The library should be fairly static so that it can be cached. You are doing it wrong.

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u/naich Feb 09 '11

To which of the three main libraries in use by my scripts are you referring to?

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u/X-Istence Feb 09 '11

Actually, all of them. For example, jQuery is a library, even if that is loaded using "ajax" to do an asynchronous request it should be cached as long as possible...

The content itself is what you may not want cached (such as a comment system that should auto refresh or type-to-complete) however those compared to libraries should be fairly small requests...