server {
  listen 80;
  server_name $hostname;
  root /var/www/danbooru/public;
  index index.html;
  access_log /var/www/danbooru/log/server.access.log;
  error_log /var/www/danbooru/log/server.error.log;
  client_max_body_size 30m;
  location /stylesheets {
    expires max;
    break;
  }
  location /javascripts {
    expires max;
    break;
  }
  location /data {
    valid_referers none $hostname;
    if ($invalid_referer) {
      return 403;
    }
    expires max;
    break;
  }
  location /maintenance.html {
    expires 10;
   }
  if (-f $document_root/maintenance.html) {
    rewrite ^(.*)$ /maintenance.html last;
    break;
  }
  location / {
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;
    proxy_redirect false;
    if (!-f $request_filename) {
      proxy_pass http://mongrel;
    }
  }
  error_page 404 /404.html;
  error_page 500 502 503 504 /500.html;
}