Caching on some computers

Kirby 2 Solved ✅
1

A client can’t see updates to the website even though we have Kirby caching disabled in the config (and the site/cache folder is empty). Next I thought it may be the .htaccess file. Here’s some code from that:

...
<IfModule mod_expires.c>
ExpiresActive On
ExpiresDefault "access plus 30 days"
# cache.appcache needs re-requests if FF 3.6 (thanks Remy ~Introducing HTML5)
ExpiresByType text/cache-manifest "access plus 0 seconds"
# document html
ExpiresByType text/html "access plus 0 seconds"
...

I thought I disabled html caching with those directives following the ExpiresDefault. I don’t know why else the client wouldn’t be seeing any of the updates?

1 Like
2

What updates are not showing? Are we talking about content or CSS / Javascript changes?

3

Thanks @jimbobrjames. It’s html content for sure, I haven’t heard from them about CSS/JS issues.

4

Are you sure they are accessing the site directly? There are apps for phones and desktop that speed up sites by passing them through a server in the middle, like Opera Turbo. Are you sure theres not some kind of proxy or other interference going on here?

Some mobile phone operators also do this.

5

To mitigate the above, you can try adding this to your .htaccess.

# ----------------------------------------------------------------------
# | Content transformation                                             |
# ----------------------------------------------------------------------

# Prevent intermediate caches or proxies (e.g.: such as the ones
# used by mobile network providers) from modifying the website's
# content.
#
# https://tools.ietf.org/html/rfc2616#section-14.9.5
#
# (!) If you are using `mod_pagespeed`, please note that setting
# the `Cache-Control: no-transform` response header will prevent
# `PageSpeed` from rewriting `HTML` files, and, if the
# `ModPagespeedDisableRewriteOnNoTransform` directive isn't set
# to `off`, also from rewriting other resources.
#
# https://developers.google.com/speed/pagespeed/module/configuration#notransform

<IfModule mod_headers.c>
     Header merge Cache-Control "no-transform"
</IfModule>
6

I’ll try this. I also so in the previous section you referenced (https://tools.ietf.org/html/rfc2616#section-14.9.4) a directive called “End-to-end reload.” I wonder how to implement that? Would that force a complete refresh on the client machine?

7

Im afraid I am not familiar with that, maybe someone else can help you here.

8

Is it only the client that can’t see the updates? Can other people see the updates? Does it happen with any browser?

Have they tried to clear the browser cache?

9

Wow, turns out it was only on that machine and effecting all browsers there. I found out the previous tech support had hard-wired the old IP address in the host file. So commenting that out and flushing the DNS solved the issue. Thanks for all the help @jimbobrjames and @texnixe!