hack around rackspace CDN SSL limitation

application_helper.rb

def cloud_image_path(source)
  if %w{development test}.include?(Rails.env) || request.ssl?
    image_path(source)
  else
    "http://yourpath.cdn.rackspacecloud.com/" + source.split("/").last
  end
end

def cloud_image_tag(source, options={})
  image_tag(cloud_image_path(source), options)
end

sample_view_usage.html.erb

cloud_image_path('/images/subdir/whatever.jpg')

cloud_image_tag("logo.gif", :usemap=>"#Homelink", :alt=>"logo", :width=>123, :height=>45)