[nginx] Using User-Agent & IP address to rate limit
nginx-forum at nginx.us
Mon Jul 28 16:43:14 UTC 2014
Thanks for the prompt feedback! Yes, the continuous if directives put my
teeth on edge as well. Using a map block to introduce variables for $zone
and $burst respectively, I tried this already and had continuous errors.
Attempting this again (per your suggestions), I have this error --
nginx: [emerg] invalid burst rate "burst=$burst" in
With line 69 as follows --
limit_req zone=$zone burst=$burst;
Reading the limit_req directives
there is no information specifying that you can use a variable to set these
values. Likewise I do not believe you can use limit_req inside the context
of an if directive (as you can with proxy_pass for example -
attempt to read off the value of $http_user_agent and set the limit_req
inside an if block resulted in many "nginx: [emerg]" errors.
My second thought now is to use nested locations after doing a rewrite on
the $uri and inside these nested locations set the limit_req, log the info,
and proxy_pass along. This way the request doesn't have to start over.
Posted at Nginx Forum: http://forum.nginx.org/read.php?2,252085,252087#msg-252087
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