Sometimes, you just need that absolute URL. Padrino gives you a great little helper to create your urls in th form of url_for. Unfortunately, Padrino's documentation seems to be written from the point of view of someone who is intimately familiar with Rails, which means the total noob trying to get into Padrino without any Rails experience can be left a little flummoxed. Anyway, it is important to realise that Padrino has Sinatra as its base and you can tap into all that goodness that Sinatra offers. Absolute urls are as simple as:
<%= uri url(:controller, :action, :param=>value) %>Lovely.