Best way to redirect all your pages from www to root domain using ruby on rails?

What'开发者_开发知识库s the best way to redirect all your pages from www to root domain using ruby on rails?

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Sometimes your host won't let you do redirects, so I think it's ok practice to do it either in your application_controller or middleware. If you're on Rails3, check out this no-www gem

This SO Question has examples of going from www to no-www and from no-www to www.

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Does it have to be in Rails? This is pretty easy to do with Apache, for instance.

http://txt.binnyva.com/2008/09/remove-www-from-url-using-htaccess-in-apache/