Попробовал так
location / {
add_before_body /before_action;
add_after_body /after_action;
}
location = /before_action {
root before_action/50x.html;
}
location = /after_action {
root after/50x.html;
}
Но ничего так и нет
Posted at Nginx Forum: http://forum.nginx.org/read.php?21,114834,115795#msg-115795