module ActionController::HttpAuthentication::Digest

def decode_credentials(header)
  ActiveSupport::HashWithIndifferentAccess[header.to_s.gsub(/^Digest\s+/, '').split(',').map do |pair|
    key, value = pair.split('=', 2)
    [key.strip, value.to_s.gsub(/^"|"$/,'').delete('\'')]
  end]
end