Method: ActionDispatch::Http::URL.extract_subdomains

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

.extract_subdomains(host, tld_length) ⇒ Object

Returns the subdomains of a host as an Array given the domain level.

# Top-level domain example
extract_subdomains('www.example.com', 1) # => ["www"]
# Second-level domain example
extract_subdomains('dev.www.example.co.uk', 2) # => ["dev", "www"]



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# File 'actionpack/lib/action_dispatch/http/url.rb', line 34

def extract_subdomains(host, tld_length)
  if named_host?(host)
    extract_subdomains_from(host, tld_length)
  else
    []
  end
end