nginxresizeproxycache

    # Nginx image resize + proxy + caching of results.
    # based on article: http://adw0rd.com/2012/11/10/django-nginx-image/en/ with third party servers support
    # usage:
    # http://localhost:8888/resize/365/260/?url=https://meduza.io/image/share_images/32059.png?1470633569#800x420
    # http://localhost:8888/crop/365/-/?url=https://meduza.io/image/share_images/32059.png?1470633569#800x420
http {
  #...
  proxy_cache_path /usr/local/openresty/nginx/cache levels=1:2 keys_zone=thumb:10m max_size=1G;
  
  server {
  #...
  location ~ ^/resize/([\d\-]+)/([\d\-]+)/ {
    #proxy http://nginx.org/ru/docs/http/ngx_http_proxy_module.html
    resolver 8.8.8.8;
    proxy_pass $arg_url;

    #resize http://nginx.org/ru/docs/http/ngx_http_image_filter_module.html
    image_filter resize $1 $2;
    image_filter_buffer 2M;
    
    #cache http://nginx.org/ru/docs/http/ngx_http_proxy_module.html
    proxy_cache thumb;
    proxy_cache_key "$arg_url$document_uri";
    proxy_cache_valid 200 1d;
    proxy_cache_valid any 1m;
    proxy_cache_use_stale error timeout invalid_header updating;
    break;
  }
  location ~ ^/crop/([\d\-]+)/([\d\-]+)/ {
    resolver 8.8.8.8;
    proxy_pass $arg_url;

    image_filter crop $1 $2;
    
    proxy_cache thumb;
    proxy_cache_key "$arg_url$document_uri";
    proxy_cache_valid 200 1d;
    proxy_cache_valid any 1m;
    proxy_cache_use_stale error timeout invalid_header updating;
    break;
  }
}