"Explorer"...

files.haml

!!! 5
%html
  %body
    - @files.each do |file|
      %article
        %h1
          %a(href="/#{file.identifier}")= file.title
        - begin
          %blockquote= file.description
        - rescue
          %blockquote No se pudo cargar por error en el encoding

Pianofile

require "maruku"

class DCResource
  attr_accessor :identifier, :title, :description
  
  def initialize path
    if File.exist? path
      @identifier = path.force_encoding("UTF-8")
      @title = path.force_encoding("UTF-8")
      @description = File.read( path ).lines.to_a[0..4].join("\n").force_encoding("UTF-8")
    end
  end
  
  def self.descartados
    [/\./, /\.\./, /\.ini$/, /\.haml$/]
  end
end

get "/" do
  @files = []
  Dir.new(Dir.pwd).each do |file|
    encaja_en_descartado = false
    DCResource.descartados.each do |descartado|
      if file.match descartado
        encaja_descartado = true 
        break
      end
    end
    
    unless encaja_en_descartado
      @files << DCResource.new( file )
    end
  end
  try_haml :files
end

get %r{^/(.+).md$} do |element|
  if File.exist? "#{element}.md"
    Maruku.new(File.read("#{element}.md")).to_html
  end
end