QS_ClientEventRequestLimit Notworking, Need Helping!

[Will Ng]

Hello,

I'm a novice web developer.
I'm trying to to use mod_qos to limit the concurrent downloads/ segment downloads per visitor for my video streaming project to prevent IDM or download accelerator from hogging my vps' resources.
The project is running on Apache 2.4.29/ Ubuntu 18.04 LTS, mod_qos v.11.44-1build1.
Videos played by calling fuction in "videoplayback.php"

The uri looks like this: /videoplayback/?sid=abcdef12345xyz
Here is my config in virtual host.

<IfModule qos_module> 
        SetEnvIf Request_URI ^/videoplayback/\?.*$ QS_EventRequest
        QS_ClientIpFromHeader X-Forwarded-For
        QS_ClientEventRequestLimit 2 #Two concurrent download threads/user
        SetEnvIf Request_URI ^/videoplayback/\?.*$ QS_Event
        QS_ClientIpFromHeader X-Forwarded-For
        QS_ClientEventPerSecLimit 1
</IfModule>

It turns out not working. May there's something wrong with the config? Idk.

If you could give a suggestion, it'd be very appreciated.
Thanks.

[Pascal Buchbinder]

1) RequestURI: this is the path portion of the request URL only (/videoplayback/) which means that your regular expression does not match.
2) Noticed that you configured QS_ClientIpFromHeader twice (doesn't cause any problems but I wonder if you use this directive by intention)
3) You might also check if you want to use QS_ClientSerialize.

regards, Pascal