Rails: How to create an url shortener? -

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i'm not sure if url shortener right name it, because of search results point toward things bit.ly.

so, here want: given url strings like:

http://avc.com http://firstround.com/review/feed/ http://svpg.com/articles/ http://www.medium.com/  http://www.paulgraham.com/

turn 

avc.com firstround.com svpg.com medium.com paulgraham.com

no subdomain, no subdirectory, no /.

i can url.split('://')[1].split('/')[0], cannot rid of www, , i'm wondering if there better way of doing it?

you can use uri module , use regexp parse out first www. like

def host(url)     uri = uri.parse(url)     uri.host.sub(/^www./, '') end

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