The problem is getting proxied content to be cached by Apache 2.4.
This problem was solved for Apache 2.2 (i.e. use mod_mem_cache). But in Apache 2.4 mod_mem_cache was removed.
My upstream content source is http://10.1.1.123:8081/data/ and it is configured in Apache like this:
Alias /data /var/www/html/index.php
The data index.php works like this:
root@orac:/var/www/html# cat index.php
<?php
$expires = time() + 5;
$expires = gmdate( 'D, d M Y H:i:s', $expires ) . ' GMT';
header( 'Content-Type: text/html; charset=utf-8' );
header( "Expires: {$expires}" );
echo $expires;
i.e. it expires content after five seconds since requested.
If I access /data directly (from my web browser) the five second caching works.
In Apache my proxy configuration looks like this:
ProxyPass /cache/ http://10.1.1.123:8081/data/
ProxyPassReverse /cache/ http://10.1.1.123:8081/data/
And my caching configuration looks like this:
CacheEnable disk /
CacheRoot "/var/cache/mod_proxy"
CacheDirLevels 3
CacheDirLength 5
CacheIgnoreCacheControl On
CacheMaxFileSize 100000000
CacheIgnoreNoLastMod O
The cache store is writeable by www-data:
root@orac:/var/cache/mod_proxy# ls -al
total 8
drwxr-xr-x 2 www-data www-data 4096 Jun 5 13:41 .
drwxr-xr-x 19 root root 4096 Jun 5 13:41 ..
Can anyone help me out with this?
