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Editorial Team
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Asked: 2026-05-23T12:26:43+00:00

I am trying to refresh a page, but WANT to use the cache and

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I am trying to refresh a page, but WANT to use the cache and can’t figure out how to do this. There are two situations:

  • If I click in the URL bar and hit enter (or visit the page from somewhere else) it reloads the page/images from the cache. GREAT!

  • If I click on the refresh button or use Javascript to refresh the page it grabs all the images again and takes forever. NOT GREAT!

I’ve tried: top.location.reload(false); and top.location.reload(true); (I’m sending this from in an iFrame) and neither used the cache. I’m avoiding using location so it doesn’t end up in the browser history twice.

Question: How do I reload the page using the cached images? Is there a different javascript function or is this a mod_expires issue?

Thanks for any help in advance!

EDIT: (info from chrome: developer tools)

  • When navigating to the page I get “From Cache” for all images
  • When refreshing page I get “304 – Not Modified” for all images (and it takes the time to download each)

EDIT 2: (Headers from an image, safari: developer tools)

Javascript: top.location.reload(false); (No Cache!)

Status Code:304 Not Modified

Request Headers
Cache-Control:max-age=0
If-Modified-Since:Tue, 28 Jun 2011 07:13:17 GMT
If-None-Match:"104684ae-a7d-66e41d40"
Referer:http://getdirectus.com/dev/media.php
User-Agent:Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_7; en-us) AppleWebKit/533.21.1 (KHTML, like Gecko) Version/5.0.5 Safari/533.21.1

Response Headers
Cache-Control:max-age=157680000
Connection:Keep-Alive
Date:Tue, 28 Jun 2011 16:56:50 GMT
Etag:"104684ae-a7d-66e41d40"
Expires:Sun, 26 Jun 2016 16:56:50 GMT
Keep-Alive:timeout=5, max=94
Server:Apache/2.0.54

Navigating to page: (Uses cache)

Status Code:200 OK

Response Headers**
Accept-Ranges:bytes
Cache-Control:max-age=157680000
Connection:Keep-Alive
Content-Length:2685
Content-Type:image/jpeg
Date:Tue, 28 Jun 2011 16:54:20 GMT
Etag:"104684ae-a7d-66e41d40"
Expires:Sun, 26 Jun 2016 16:54:20 GMT
Keep-Alive:timeout=5, max=99
Last-Modified:Tue, 28 Jun 2011 07:13:17 GMT
Server:Apache/2.0.54
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1 Answer

  1. Editorial Team

    The documentation for window.location.reload( false ); says it will load from cache. If that isn’t happening then you may be seeing a browser bug. See if you can replicate the problem in another browser.

    EDIT (for your edit): You are seeing that behaviour because you don’t have an Expires header set in the future. You will need to add an Expires header in Apache.

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