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Re: How to prevent Internet Explorer from locally caching pages
From: Liam Quinn (liam
htmlhelp.com)
Date: Thu Apr 03 2003 - 19:35:36 CST
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On 4 Apr 2003, Adrian Caneva wrote:
> Expiration headers seem to be ignored by Internet Explorer behind a Proxy
> server when using BACK / FORWARD buttons.
> On Microsoft's Knowledge Base Article 234067 (HOWTO: Prevent Caching in
> Internet Explorer) I've found that in fact this can happen.
> And I could verify that, behind a Proxy, IE (6.0, 5.5, 5.0) gets the page
> from local disk cache although Expire = -1 header should force it ask the
> web server for an updated version.
FWIW, IE's behaviour seems to be in agreement with the HTTP/1.1
specification:
By default, an expiration time does not apply to history mechanisms.
If the entity is still in storage, a history mechanism SHOULD display
it even if the entity has expired, unless the user has specifically
configured the agent to refresh expired history documents.
http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13.13
--
Liam Quinn
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