nginx_twitter_style_image_rewrite.conf

server {
        listen   80;
        listen   [::]:80;

        root /var/lib/www;
        server_name _;

        server_tokens off;
        more_clear_headers Server;
        add_header Server "selami/image-server";

        location / {
                rewrite /images/(.*):(\w+)$ /cdn/images/$2/$1 last;
                try_files $uri $uri/ 404;
        }

        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
                root /usr/share/nginx/www;
        }
        location ~ /\.ht {
                deny all;
        }
}