This script will create a CDN backed container named "demo-container" containing a file called demo-file" To run this install fog using `gem install fog` and the script can be run as follows: ```ruby cloud_files_publish <username> <api key>```

cloud_files_publish.rb

require 'fog'
require 'tempfile'

# Note: Only Rackspace, HP, and Amazon have CDN support. This example only demonstrates creating a CDN backed container with Rackspace and HP. (Amazon does something else.)

begin
  # :provider is the only standard key all others are provider specific
  service = Fog::Storage.new :provider => 'rackspace',
    :rackspace_username => ARGV[0],
    :rackspace_api_key => ARGV[1]
  
  # Note: Fog refers to containers as directories
  # When the public attribute is set to true, Fog automatically publishes this container to the CDN
  puts "Create and Publish Container to CDN"
  dir = service.directories.create :key => 'demo-container', :public => true

  f = Tempfile.open 'fog-test-file'
  f.write "Hello Cloud Files"
  f.rewind

  puts "Create Object From File"
  obj = dir.files.create :key => 'demo-file', :body => f
  
  puts " Go to #{obj.public_url}"
rescue => e
  puts e.backtrace
ensure
  f.unlink if f
end

It would have been more idiomatic to skip the temp file creation in lines 17-19 and just pass the "Hello Cloud Files" string into the file create command on line 22.

Let me know if you have any questions or need any edits.