method

extract_subdomain

v7.1.3.4 - Show latest stable - Class: ActionDispatch::Http::URL

extract_subdomain(host, tld_length)

public

Returns the subdomains of a host as a String given the domain level.

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

# File actionpack/lib/action_dispatch/http/url.rb, line 46
        def extract_subdomain(host, tld_length)
          extract_subdomains(host, tld_length).join(".")
        end

extract_subdomain

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