url-shortener/app.rb

require 'roda'
require 'securerandom'
require 'json'

class App < Roda
  plugin :render, escape: true
  route do |r|
    r.root do
      view :home
    end

    r.get String do | url_code |
      "redirect to url"
    end

    r.post "create" do
      view :create   
    end
  end
end