limit_req_zone: How to apply only to some requests containing some string in the URL?

[Brian08275660]

Hi Francis,

Now I need to create a limit that acts if the parameter ("capacity") is
empty (not provided). How do I do that? I can't find how to, at least not
using "map".
(If provided, the other rules will evaluate it and one of them will act
according to the value).

Thanks in advanced!

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,244015,244123#msg-244123