builder_leak.rb

require "rubygems"
require "nokogiri"
require 'dike'
Dike.logfactory '/tmp/dikelogfactory/'

class ZipZap
  attr_reader :zip, :zap
  def initialize
    @zip = "zip"
    @zap = "zap"
  end

  def switch
    @zap, @zip = @zip, @zap
  end
end

##
# Your application's views (stanzas) should be descendant of this class.
class View 
  attr_reader :output, :view_template

  ##
  # Instantiate a new view with the various varibales passed in assigns and the path of the template to render.
  def initialize(path, assigns)
    @output = ""
    @view_template = path
    assigns.each do |key, value| 
      instance_variable_set("@#{key}", value)
      self.class.send(:define_method, key) do # Defining accessors
        value
      end
    end
    @z = ZipZap.new
  end

  ##
  # "Loads" the view file, and uses the Nokogiri Builder to build the XML stanzas that will be sent.
  def evaluate(str)
    builder = Nokogiri::XML::Builder.new do |xml|
      eval(str)
    end
    builder.children #we return the doc's children (to avoid the instruct)
  end 
end 




10.times do
  Dike.finger 

  @v = View.new("/path/to/my/view", {:id => rand(100), :name => "julien", :age => 26, :city => "San Francisco", :friends => ["simon", "romain", "pierric"], :family => ["nicolas", "antoine", "emma"]})

  @z = ZipZap.new

  str = <<-STR
  xml.person(:sex => "male", :id => @id) do
    xml.name(@name)
    xml.age(@age)
    xml.city(@city)
    xml.contacts do
      @friends.each do |friend|
        xml.friend(friend)
      end
      @family.each do |family|
        xml.family(family)
      end
    end
  end
  STR

  @v.evaluate(str)

  @v = nil
end