Question

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Ruby code to extract host from URL string

I found this module called URI which can parse the url. (I’m pretty new to ruby. Is ‘module’ synonymous with ‘library’ in this case?) You can then extract the host name.

uri = URI.parse("http://www.ruby-lang.org/")
...
p uri.host
# => "www.ruby-lang.org"

From this, I suppose you could remove ‘www.’ and keep other subdomains using regular expressions.

Does anyone have a more straight-forward alternative or does this approach seem right?

Answer 1

You can use domainatrix gem to get what you want: url.domain + url.public_suffix, but you can just do some string manipulation like uri[4..-1].