location / {
root /var/site;
index index.html;
if ($arg_tracker) { add_header Set-Cookie "tracker=$arg_tracker;Max-Age=50"; }
}
location / {
root /var/site;
index index.html;
if ($args ~ "^tracker=(\d+)") {
set $key_track $1;
add_header Set-Cookie "tracker=$key_track;Max-Age=50";
}
}