class method `self.extract_subdomains`

Ruby on Rails 6.1.7.10

Since v3.1.12

Available in: v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

self.extract_subdomains(host, tld_length)

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"]

Parameters

host req
tld_length req

Source

# File actionpack/lib/action_dispatch/http/url.rb, line 32
        def extract_subdomains(host, tld_length)
          if named_host?(host)
            extract_subdomains_from(host, tld_length)
          else
            []
          end
        end

Defined in actionpack/lib/action_dispatch/http/url.rb line 32 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActionDispatch::Http::URL

Signature

Parameters