TinyUrl - URL shotener

#tinytiny.rb

# My first Ruby/Sinatra app, a URL shortener.

# by Leah Culver (http://github.com/leah)

require 'rubygems'

require 'sinatra'

require 'dm-core'

# Base36 encoded

BASE = 36

class Tinytiny

  include DataMapper::Resource

  property :id, Serial

  property :url, String

end

DataMapper.setup(:default, ENV['DATABASE_URL'] || "sqlite3://#{Dir.pwd}/tiny.sqlite3")

configure do

  DataMapper.auto_upgrade!

end

get '/' do

  # Form for entering a fatty URL

  <<-end_form

  <h1>Tiny tiny URLs!</h1>

  <form method='post'>

    <input type="text" name="url">

    <input type="submit" value="Make it tiny!">

  </form>

  end_form

end

post '/' do

  # Put the fatty URL in the database and display

  tiny = Tinytiny.new(:url => params[:url])

  if tiny.save

    url = request.url + tiny.id.to_s(BASE)

    "Your tiny tiny url is: <a href='#{url}'>#{url}</a>"

  end

end

get '/:tinyid' do

  # Resolve the tiny URL

  tiny = Tinytiny.first(:id => params[:tinyid].to_i(BASE))

  redirect tiny.url

end