[Javascript] Cache prevention with a changing query string?

[Rodney Myers]

Thanks Mark.

Our system is entirely client side so though asp may be used most merchants do
not have it.

If as you say client side generated query strings are just as good then I'll
work with that.

Rodney

"Rees, Mark (TWIi London)" wrote:

> Hello
>
> If you change the querystring of a page to something which isn't in the
> cache, your browser (ie4+, netscape4+ at least) will request it from the
> server again - you can test that easily enough for yourself.
>
> if you're in a shop environment you could use a session ID for the same
> purpose (if you're using sessions of course) as they are pretty much unique
> as well (at least in ASP).
>
> Mark
>
> -----Original Message-----
> From: Rodney Myers [mailto:rodney at aflyingstart.net]
> Sent: 04 July 2001 10:04
> To: Javascript List
> Subject: [Javascript] Cache prevention with a changing query string?
>
> In comp.lang.javascript someone recommended a link like this to prevent
> a page coming from cache.
>
> The idea is to add a different query string every time the page is
> called:
>
> <p><a href="test.html"
>   onclick="document.location.href='test.html?cCache=' + (new
>  Date()).valueOf();return false;">link text</a></p>
>
> Being a lazy person who prefers not to write things twice if once will
> do, I would prefer to write something like:
>
> <p><a href="test.html"
>   onclick="document.location.href=this.href+'?cCache=' + (new
>  Date()).valueOf();return false;">link text using this.href</a></p>
>
>  Where this.href removes the need to repeat the page name.
>
>  The contributor, whose original message I do not have, commented that
> having a normal href property in the link would enable the link to work
> with javacript off (though without the cache bypassing bonus).
>
>  Does anyone have positive or negative expereince of working with such
> anti cache devices?
>
>  Assuming it does work, I would then work on adapting the date related
> query string so that (for example) the query string would not change
> during a day, so the page could come from cache during any given
> shopping session.
>
>  TIA
>
>  Rodney
>
> --
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>
> Enquiries regarding Shop at ssistant Classic training :
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>
> Rodney Myers
> Based in Oxford, England
> Technical Director, Shop at ssistant eCommerce Solutions
>
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--
Shop at ssistant Add-ons and Developer Workshops
http://www.aflyingstart.net/addons/

Enquiries regarding Shop at ssistant Classic training :
Call 01256 880770

Rodney Myers
Based in Oxford, England
Technical Director, Shop at ssistant eCommerce Solutions