Topic: mod_substitute not working as expected (or is it?)

[laurent.landreau]

Hello all,
I am currently deploying an Apache web + Liferay + MySQL and have a problem with the substitute module.
All servers are in different subnets (indicated by '/' below):

F5 + Load-Balancer-External / Apache / LB-Internal + Liferay / DB

In the Apache httpd.conf, I have two separate statements:
1) a proxypass command: when the inbound traffic URL is suffixed with /liferay, I replace the URL with the LB-Internal URL so that the traffic gets forwarded to Liferay. That works fine.
2) a substitute command: when the page contains the LB-internal URL in the outbound traffic coming from Liferay, the substitute module (should) replace the LB-internal string with the URL of the external load balancer.

Problem:
* in the web page sent back to the browser, the LB-Internal URL does not get substituted, meaning the browser gets a URL that it cannot access.

Additional information:
* when I hardcode the exact same set of URLs in an Index.html page served directly by the Apache web server, then the substitution does take place.

Configuration: Apache 2.2.7 on Linux

Substitute directive:
<Location />
AddOutputFilterByType SUBSTITUTE text/html
Substitute s/internal-ELBApp-197711875/ELBWeb-812043423/ni
</Location>
#

I suspect (but I am not sure) that it has to do with how the location statement is used, for Apache based page or for a proxied server.

Am I missing something on through which components the outbound traffic goes through?
Is there something specific in the httpd.conf that I am missing?


Thanks,
Laurent LANDREAU
Oakton - Australia

[jraute]

@admin: FYI
This Topic is identical to http://www.apachelounge.com/viewtopic.php?p=31501#31501 just the headline is different.

[Steffen]

Thanks for the heads up, removed the other one.