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Firefox is ignoring cache-control directives

  • 2 uphendule
  • 111 zinale nkinga
  • Igcine ukuphendulwa ngu Jamie Kitson

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Firefox is not respecting cache-control directives specified in response headers. Below is an example response generated by my application:

Server: Apache-Coyote/1.1 X-Powered-By: Servlet 2.4; JBoss-4.2.3.GA (build: SVNTag=JBoss_4_2_3_GA date=200807181417)/JBossWeb-2.0 Pragma: no-cache Cache-Control: no-cache Expires: Thu, 01 Jan 1970 00:00:00 GMT Content-Type: text/html;charset=ISO-8859-1 Transfer-Encoding: chunked Date: Fri, 25 Jun 2010 16:13:53 GMT

Despite the cache-control: no-cache, and the fact that the page has already expired, when the user navigates away, and then hits the back button, the page is re-displayed from cache. This causes subsequent navigation attempts to fail because the transaction identifiers are stale and have already been used.

This happened

Every time Firefox opened

All Replies (2)

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Firefox's cache mechanism doesn't have the same rules as an ordinary cache; in fact RFC 2616 suggests that it would be better to diverge in this sense. From RFC 2616 §13.13:

History mechanisms and caches are different. In particular history mechanisms SHOULD NOT try to show a semantically transparent view of the current state of a resource. Rather, a history mechanism is meant to show exactly what the user saw at the time when the resource was retrieved.

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I had a similar problem to you and eventually found the following:

Cache-control: no-cache
Cache-control: no-store
Pragma: no-cache
Expires: 0

Okulungisiwe ngu Jamie Kitson