class Aws::CloudFront::UrlSigner

def resource(scheme, url)
  case scheme
  when 'http', 'http*', 'https' then url
  when 'rtmp'
    url_info = URI.parse(url)
    path = url_info.path
    path[0] = ''
    resource_content = "#{File.dirname(path)}/#{File.basename(path)}".gsub(' ', '/')
    if url_info.query
      "#{resource_content}?#{uri.query}"
    else
      resource_content
    end
  else
    msg = "Invaild URI scheme:#{scheme}.Scheme must be one of: http, https or rtmp."
    raise ArgumentError, msg
  end
end