有关nginx日志格式的设计分享

#设置user_id的默认值
set $user_id "0";
#设置user_kind的默认值
set $user_kind "-";
#设置uuid的默认值
set $uuid "_";

if ( $http_cookie ~* "user_id=([0-9]*)" ){
     set $user_id $1;
     }

if ( $http_cookie ~* "user_kind=([0-9]*)" ){
     set $user_kind $1;
     }

if ( $http_cookie ~* "_uuid=([A-Za-z0-9 ]*)" ){
      set $uuid $1;
    }