Serve Pingdom uptime image from an https site

index.haml

%h1 Uptime
= image_tag uptime_image_path, :height => "165", :width => "300"

routes.rb

map.uptime_image '/pingdom_uptime_image', :controller => 'something', :action => 'uptime_image'

something_controller.rb

class SomethingController < ApplicationController
  require 'net/http'

  include SslRequirement

  def ssl_required?
    true
  end

  def index
    # do your stuff
  end

  def uptime_image
    img = URI.parse("http://share.pingdom.com/banners/123secrets")
    send_data Net::HTTP.get(img), :content_type => 'image/png', :disposition  => 'inline'    
  end

end