Pastable version of Personalized URL (Purl) Subdomain Sub

<pre class='prettyprint' language='ruby'>module Rack
    class Request
      def subdomains
        @env['rack.env.subdomains'] ||= lambda {
          return [] if (host.nil? ||
          /\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/.match(host))
          host.split('.')[0...-2]
          }.call
        end
      end
    end

before do
      @purl_base = if request.subdomains.empty? then request.host else request.host.sub(&quot;#{request.subdomains.join('.')}.&quot;, &quot;&quot;) end #personalurl.com
      @purl = Purl.first(:purl =&gt; @purl_base)
      Purl.current = @purl
      @user = CData.first(:unique_name =&gt; request.subdomains.join('.')) unless request.subdomains.empty? #g.manley
    end

get '/' do
      if
        request.subdomains.empty?
        then
        erb :&quot;#{@purl.name}/blank&quot;
      else
        erb :&quot;#{@purl.name}/index&quot;
      end
    end</pre>
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Pastable version of Personalized URL (Purl) Subdomain Sub