visitor (0 QPoints)
  • FR
  • EN
  • NL
  • DE
  • ES
315 experts, 1193 registered users, 1659 questions already answered
European Experts Exchange, the very best site for high-quality IT solutions

New Improved Search!

 


05/10/2011 1h30 : Steve Jobs is dead, the father of Apple ][ is gone, we are all orphaned.

Web :: General :: dynamic stylesheets caching ? Les pages de style dynamiques sont-elles en cache ?
By: Josdeveld Belgium  Date: 26/04/2006 09:35:34  French English  Points: 20 Status: Answered
Quality : Excellent
Hello, désolé d'écrire en anglais mais il est bien meilleur que mon français.

I'm using a server-side script language (namely, PHP) to generate my stylesheets , using :

html:

<style type="text/css">@import url("css.php?css=normal&lang=en");</style>



css.php:

<?php header('Content-type: text/css'); header('Cache-control: private') ; header('Pragma: private'); ?> body{...} h1{...} etc



Do you think this kind of dynamic stylesheet will be cached on the client? Will they be cached as well as regular, static, ".css" stylesheets?

I found that regular stylesheets are cached for a long period of time by the browsers and that is what I'm aiming for using my dynamic stylesheets.

As a side question, would the the stylesheet's URI ending with ".php" (+ some parameters) amper the browser to cache its contents ? Or will it obey the Content-type only ?

Thanks in advance
By: VGR Date: 26/04/2006 09:54:00 English  Type : Answer
Hello,

First for all readers they have to know that in order to be able to do that, you need to apply one of those two well-known techniques :
1a) use SSI on the CSS (server-side includes), like in :

<link rel="stylesheet" href="styles.php?someparam=somevalue" type="text/css">



Just make sure it outputs it with the correct mime type in the headers: text/css

1b) use a server-side script to generate (ASP,PHP,etc) :
Code like you did, using parameters to the css.php URI so that $_GET[] is available in the css script.
You will also need to modify the AddType settings in the Apache httpd.conf file (or the IIS equivalent, if there is one ;-)

AddType application/x-httpd-php .css



Now, as for your main question : AFAIK, dynamically generated stylesheets are exactly like other PHP-generated pages, ie they are not to be cached by default - you must use the PHP header function to set a cache setting, like in this adapted php.net example :

<?php Header('Cache-Control: must-revalidate'); $offset = 60 * 60 * 24 * +1; //VGR REM expires tomorrow Header('Expires: '.gmdate('D, d M Y H:i:s',time()+$offset).' GMT'); ?>



The fast answer to your side question are "no" and "yes under conditions" (ie, for a decent browser)

best regards

Do register to be able to answer

©2010 These pages are served without commercial sponsorship. (No popup ads, etc...). Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE.
Please DO link to this page! Post to Twitter Post to Plurk Post to Yahoo Buzz Post to Delicious Post to Digg Post to Facebook Post to MySpace Post to Ping.fm Post to Reddit Post to StumbleUpon

EContact
browser fav
page generated in 93.413110 milliseconds

Why Google AdSense ads ?
compteur
 Ranking-Hits PageRank for this page