Super basic rails subdomain library.

Subdomain.md

Simple Subdomain

Super simple library for using subdomains in your rails routes.

Lets you do

subdomain('online') do
  root :to => 'online#index'
end

in your routes.rb.

It also has subdomain(Subdomain::None) do which matches www.yourdomain.com as well as yourdomain.com, and subdomain(Subdomain::Any) do which matches as long as a subdomain other than www is present.

subdomain.rb

module Subdomain
  module Any
    def self.matches?(request)
      request.subdomains.first.present? && request.subdomains.first != 'www'
    end
  end
  module None
    def self.matches?(request)
      request.subdomains.first == 'www' || !request.subdomains.first.present?
    end
  end

  def subdomain(subdomain)
    if subdomain.class == Module
      constraint = subdomain.method(:matches?)
    else
      constraint = lambda do |request|
        request.subdomains.first.present? && request.subdomains.first == subdomain
      end
    end
 
    constraints(constraint) do
      yield
    end
  end
end
 
class ActionDispatch::Routing::Mapper
  include ::Subdomain
end