How to respect Robots.txt using Nokogiri?

I'm testing it and Nok开发者_JAVA技巧ogiri does not seem to respect Robots.txt file. Is there someway to make it respect? It seems like common question, but I could not find any answer online.

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Nokogiri parses the HTML or webpage that you give it. It does not know anything about the robots.txt file for the domain where the page you happen to have requested resides.

I presume that you want to ignore in-site links that are in robots.txt?

Since you've tagged this Rails, I'll assume you use Ruby. In that case you can use the Mechanize library which has the facility to use the robots.txt file.

There is also the original Perl version and other language ports if you prefer those.