QS_LocRequestLimitDefault not applying limits when using mod_rewrite

[Jurgen Goelen]

Hello *,

I've been struggling with an issue where QS_LocRequestLimitDefault isn't working when combined with mod_rewrite. Here's my configuration:

<virtualhost *:80="">
 ServerName slow.local
 Header setIfEmpty Strict-Transport-Security "max-age=31536000; includeSubDomains"</virtualhost>

ProxyPreserveHost On
 RewriteEngine On
 RequestHeader unset Origin

QS_LocRequestLimitDefault 50

RewriteRule ^/(.*)$ http://slow_backend:8000/$1 [L,P]

ProxyPassReverse / http://slow_backend:8000/

The interesting part is that when I replace the RewriteRule with a standard ProxyPass directive, the request limiting works as expected. However, I need to use mod_rewrite for most of our configurations due to complex URL manipulation requirements.
Has anyone else encountered this issue? Is there a known interaction between mod_qos and mod_rewrite that prevents QS_LocRequestLimitDefault from applying properly when using the [P] flag?
Any suggestions for getting request limiting to work while still using RewriteRule would be greatly appreciated!

Thanks in advance!

Jurgen Goelen

[Pascal Buchbinder]

QS_LocRequestLimitDefault 50 is basically QS_LocRequestLimit / 50 which does not match your proxy request (which starts with a "h") anymore.

I assume that QS_LocRequestLimitMatch ^http 50 will do the trick.

[Jurgen Goelen]

The regular expression QS_LocRequestLimitMatch ^http 50 didn't work, but modifying it to QS_LocRequestLimitMatch ^.*$ 50 solved the problem.

Thanks!