default.conf

server {
    listen       80;
    root /home;
    access_log logs/access.log;

    location ~* "^/(.*)/(.*)\.(jpe?g|png)_(\d+)x(\d+)$"{
        set $dir    $1;                     
        set $width  $4;                     
        set $height $5;                     
        set $dimens "_$4x$5";               
        set $reImage_name "$2$dimens.$3";   
        set $image_name "$2.$3";       
        set $image_uri image_resize/$dir/$image_name?width=$width&height=$height;
        alias /home/thumbs/$dir/$reImage_name;
        if (!-f $request_filename) {
            proxy_pass http://127.0.0.1/$image_uri;
            break;
        }
        proxy_store          /home/thumbs/$dir/$reImage_name;
        proxy_store_access   user:rw  group:rw  all:r;
        proxy_set_header     Host $host;
        access_log    logs/image.access.log;
    }

    location /image_resize {
        access_log  logs/image.resize.log;
        alias /home;
        image_filter resize $arg_width $arg_height;
        image_filter_jpeg_quality 75;
        image_filter_buffer 10M;
        allow 127.0.0.0/8;
        deny all;
    }

}