How to use Nginx MAP for changing html code based on cookie?

Roldan

I have this nginx map now, but it doesn't work.

map $http_cookie $loggeduser {
     default    'img/logo_guest.png';
    ~site_user    'img/logo_user.png';
    ~site_logged_in     'img/logo_user.png';
}

sub_filter 'img src="/img/'     'img src="cdn.site.com/$loggeduser';

sibaper

any reason behind this? Why don’t put the logic on your backend instead of on web server?

It’s really easy to bypass

SplitIce

Do you need to use sub_filter? It's probably better to do the job properly and to do it either on your backend or if you can't in javascript.