Ruby Redirect Proxy

legacy_url_proxy.rb

# encoding: utf-8

class LegacyUrlProxy
  URL_MAPPING = {
    '//surgeons-for-africa.com' => '//surgeons-for-africa.org',
  }

  def initialize(app)
    @app = app
  end

  def call(env)
    request = Rack::Request.new(env)
    dest_url = URL_MAPPING[request.path_info.gsub(/\/$/, '')]

    if dest_url
      [301, {'Location' => request.script_name + dest_url}, ['']]
    else
      @app.call(env)
    end
  end
end