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tobstar
Joined: Jan 05, 2004
# Posts: 145

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Posted: 2005-Aug-08 13:35
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I'm having some problems with IE cache. Bacially I'm working on a page, upload, change the page, upload again and it doesn't show the change. I've changed "check for newer versions of stored pages" to "every visit to the page".

Set "temporary internet files" to about 1mb.

I'm pretty convinced my ISP is cacheing pages as even the forced refresh doesn't help.

Am i doing something wrong? Is there a fix? should i moan at my ISP?

thanks



Prowler
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Joined: Aug 14, 2000
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Posted: 2005-Aug-08 14:16
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It all depends on the kind of pages you are delivering.

Check the header served by the server by any Server Header information tool. This might carry some cacheing information by the ISP.

To bypass the cacheing, you can resort to these header tags:
<meta HTTP-EQUIV="Pragma" Content="no-cache">
<META HTTP-EQUIV="Expires" CONTENT="Sat Jun 07 00:00:00 1980">
<meta HTTP-EQUIV="cache-control" content="no-cache">

But this must be used only as a temporary measure.



tobstar
Joined: Jan 05, 2004
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Posted: 2005-Aug-08 14:26
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thanks,

that seems like two answers to what i thought was an unanswerable!

thansk again



tobstar
Joined: Jan 05, 2004
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Posted: 2005-Aug-08 15:05
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i've tried your meta tags that you suggested and they work great,

I'm just wondering why you indicated that this 'must be used only as a temporary measure'

what may i ask are the consequences of leaving them? If this is too complicated to explain simply don't bother I'm just interested.



g1smd
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Posted: 2005-Aug-08 21:36
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When the real site is loaded, and real visitors arrive, you do want some caching to happen in order to lower the bandwidth your site serves out. ISPs will only cache for a short while, so visitors will not notice any difference. You only noticed this as the changes still had not happened after a few minutes. Most people would miss that effect.



Prowler
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Posted: 2005-Aug-09 05:41
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Internet in the 'normal' implementation is a stateless tool. Your site can be accessed from any corner of the globe. Speed is vital from the end user's perspective. Besides as my colleague g1smd pointed out here, it makes little sense to waste bandwidth. Many server admins implement bandwidth throttling to control. ISPs cache web content specifically for this purpose.

Disabling cache for bigger pages might result in slow loading of your pages. Hence the caveat.smile



tobstar
Joined: Jan 05, 2004
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Posted: 2005-Aug-09 10:22
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thanks again, i do have to say how wonderfully concise the JimGuider's are (unlike me).

- i still like to think I'd get more answers right on University challenge!!!


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