How exactly does adding a random number to the end of an AJAX server call prevent the database server or browser (not entirely sure which one is intended) from caching? why does this work?
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How exactly does adding a random number to the end of an AJAX server call prevent the database server or browser (not entirely sure which one is intended) from caching? why does this work?
It is intended to prevent client-side (or reverse proxy) caching.
Since the cache will be keyed on the exact request, by adding a random element to the request, the exact request URL should never be seen twice; so it won’t be used more than once, and an intelligent cache won’t bother keeping around something that’s never been seen more than once, at least, not for long.