class HTTPClient::OAuth

def sign(config, header, req)
  base_string = create_base_string(config, header, req)
  if handler = config.signature_handler[config.signature_method] || @signature_handler[config.signature_method.to_s]
    handler.call(config, base_string)
  else
    raise ConfigurationError.new("Unknown OAuth signature method: #{config.signature_method}")
  end
end