signing.rb

  # cf_url is http://dSomething.cloudfront.net/path
  # video_name is test.mp4
  def signed_html5
   parsed_uri = URI.parse(cf_url) 
   url = "#{parsed_uri.scheme}://#{parsed_uri.host}#{parsed_uri.path}/#{video_name}"   
   signed_url = sign(url)   
  end
  
  # cf_url is http://dSomething.cloudfront.net/path
  # video_name is test.mp4
  def signed_flash
    path = URI.parse(cf_url).path[/\/+(.*)/, 1]
    rtmp_url = "rtmp://someRandomSubDomain.cloudfront.net:1935/cfx/st/mp4:"
    rtmp_path = sign("#{path}/#{video_name}")
    full_url = "#{rtmp_url}#{rtmp_path}"
  end  
  
  def sign(url="")
    # 1 hour expiration on the URL
    url = SIGNER.sign(url.to_s, :ending => Time.now + 3600)
  end