[users@httpd] Apache reverse and caching proxy

[Wim.Van.Leuven@xxxxxx]

Hello all,

I'm retrying my configuration for a
caching proxy server which flushes the cache on the modification time of
the files. However, It doesn't seem to work anymore. The files get cached
but are not refreshed on a touch of the file on the source server. 

Not sure what I changed that it doesn't
work anymore. As far as I'm concerned, I do nothing more then setup an
apache server to serve static files from disk in an ordinary manner. Next
I put a proxy server in front. The configuration of the proxy can be found
at the end.

When inspecting the debug logs and the
http headers, all files get cached at the proxy. However when I change
the modification time of the files on the source servers, the cache doesn't
get updated. Thus still serving the old version of the file. 

As a matter a fact, once a file is cached,
the source server is never accessed anymore to verify the correctness of
the cache against the remote instances. 

Does anybody have a clue about which
sublety I'm missing here?

Thanks beforehand!
Wim Van Leuven

________________________________

...
ExpiresActive On
ExpiresDefault "modification"
...
ProxyRequests Off

<Proxy *>
    Order deny,allow
    Allow from all
</Proxy>

ProxyPass / http://srcsvr.ldc.local/
ProxyPassReverse / http://srcsvr.ldc.local/

# Cache configuration
<IfModule mod_cache.c>
    LoadModule disk_cache_module
modules/mod_disk_cache.so
    <IfModule mod_disk_cache.c>
         
  CacheRoot "C:/Program Files/Apache Group/Apache2/cache"
         
  CacheSize 256
         
  CacheEnable disk /
         
  CacheDirLevels 5
         
  CacheDirLength 3
         
  CacheIgnoreCacheControl Off
    </IfModule>
    
    #LoadModule mem_cache_module
modules/mod_mem_cache.so
    <IfModule mod_mem_cache.c>
        CacheEnable
mem /
        MCacheSize
4096
        MCacheMaxObjectCount
100
        MCacheMinObjectSize
1
        MCacheMaxObjectSize
2048
    </IfModule>  
 
</IfModule>