gistfile1.txt

vcl 4.0;
import std;
import vsthrottle;

sub vcl_recv {
    ...
    call rate_limit;
    ...
}

#
# Throttling based on request inspection
#
sub rate_limit {

    if (req.url ~ "pattern1") {
       std.log("pattern1 requests must never be throttled");
       return; # <---- Need to return early here, but can't do it
    }

    if (req.url ~ "pattern2") {
       if (vsthrottle.is_denied("pattern2" + client.identity, 100, 10s)) {
           std.log("pattern2 throttling for ip " + client.identity);
           return(synth(429, "ETOOMANYREQUESTS"));
       }
    }

    if (vsthrottle.is_denied("ip:" + client.identity, 500, 10s)) {
        std.log("global throttling for ip " + client.identity);
        return(synth(429, "ETOOMANYREQUESTS"));
    }

}