Method: ActionDispatch::Http::URL#subdomains

Defined in:
lib/action_dispatch/http/url.rb

#subdomains(tld_length = 1) ⇒ Object

Returns all the subdomains as an array, so ["dev", "www"] would be returned for “dev.www.rubyonrails.org”. You can specify a different tld_length, such as 2 to catch ["www"] instead of ["www", "rubyonrails"] in “www.rubyonrails.co.uk”.



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# File 'lib/action_dispatch/http/url.rb', line 88

def subdomains(tld_length = 1)
  return [] unless named_host?(host)
  parts = host.split('.')
  parts[0..-(tld_length+2)]
end