Nelson's Weblog: tech / expires-headers


Mastodon @nelson@tech.lgbt Linkblog Wed 2024-04-24 TreeLink.us SunPower big problems Intel's new NPU Tue 2024-04-23 Awesome Balatro Tracker Beeper Android Biometrics Fri 2024-04-19 Balatro Immolate Turning Point voting fraud Thu 2024-04-18 Bicycles of World War II AI-ese Mon 2024-04-15 Butterick’s Practical Typography Wicked Bible Sat 2024-04-13 Normalization of Jan 6 Followgraph for Mastodon South Yuba Canal Fri 2024-04-12 Waffle House order marking Wed 2024-04-10 Boy Meets Boy Meets Boys’ Love Termux Tue 2024-04-09 Netflitwitter Nigeria’s Scrabble King Search Archives 2023 12 11 10 09 08 07 06 05 04 03 02 01 2022 12 11 10 09 08 07 06 05 04 03 02 01 2021 12 11 10 09 08 07 06 05 04 03 02 01 2020 12 11 10 09 08 07 06 05 04 03 02 01 2019 12 11 10 09 08 07 06 05 04 03 02 01 2018 12 11 10 09 08 07 06 05 04 03 02 01 2017 12 11 10 09 08 07 06 05 04 03 02 01 2016 12 11 10 09 08 07 06 05 04 03 02 01 2015 12 11 10 09 08 07 06 05 04 03 02 01 2014 12 11 10 09 08 07 06 05 04 03 02 01 2013 12 11 10 09 08 07 06 05 04 03 02 01 2012 12 11 10 09 08 07 06 05 04 03 02 01 2011 12 11 10 09 08 07 06 05 04 03 02 01 2010 12 11 10 09 08 07 06 05 04 03 02 01 2009 12 11 10 09 08 07 06 05 04 03 02 01 2008 12 11 10 09 08 07 06 05 04 03 02 01 2007 12 11 10 09 08 07 06 05 04 03 02 01 2006 12 11 10 09 08 07 06 05 04 03 02 01 2005 12 11 10 09 08 07 06 05 04 03 02 01 2004 12 11 10 09 08 07 06 05 04 03 02 01 2003 12 11 10 09 08 07 06 05 04 03 02 01 2002 12 11 10 09 08 07 06 05 04 03 02 01 2001 12 11 10 09 08 07 One good site MDN Nelson Minar nelson@monkey.org Blog licensed under a Creative Commons License		Expires headers in Apache2 on Debian Do you want to enable Expires: headers on your Debian web-server? It takes three steps: Get mod_expires loaded into apache by symlinking `expires.load` in `/etc/apache2/mods-enabled`. Enable expires header in your specific site by adding the directive `ExpiresActive On` in 000-default or wherever you configure Apache. Enable a default expiration policy by adding the directive `ExpiresDefault "now plus 2 days"`. The expires header makes me a bit nervous. Pages render faster because the browser doesn't even do a HEAD request if it's in the period. But if the file actually changed, the browser will never know about it. Sort of the same problem with DNS cache times. It makes a lot of sense for static assets like images you never change. Update: I hadn't realized how many non-static images I had on my server. Pretty much any script that generates graphs from realtime data, for instance. I have a lot of rrdgraphs and the expires header breaks them. Oops! All this is motivated by Yahoo's guide for speeding up websites. Along with the YSlow tool webmasters have no excuse for not knowing why their site renders slowly. Some of their suggestions are a bit complicated for a small site (no content distribution network for my blog, sorry). But any serious web company should take a long hard look at its reports. tech 2008-03-21 16:45 Z Nelson's Weblog • tech → ago, bad, bittorrent, blosxom, dotnet, good, hqnx, iphone, mac, phone, photo, python, webservices