User-agent: *
crawl-delay:2
Disallow: /df_ufiles/

User-agent: Googlebot
crawl-delay:2
Disallow: /df_ufiles/

User-agent: bingbot
crawl-delay:2
Disallow: /df_ufiles/

User-agent: PetalBot
Disallow: /

User-agent: Baiduspider
Disallow: /

User-agent: baidu-spider
Disallow: /