class Excon::Middleware::Idempotent

def error_call(datum)
  if datum[:idempotent] && [Excon::Errors::Timeout, Excon::Errors::SocketError,
      Excon::Errors::HTTPStatusError].any? {|ex| datum[:error].kind_of?(ex) } && datum[:retries_remaining] > 1
    # reduces remaining retries, reset connection, and restart request_call
    datum[:retries_remaining] -= 1
    connection = datum.delete(:connection)
    request_keys = Utils.valid_request_keys(datum)
    datum.reject! {|key, _| !request_keys.include?(key) }
    connection.request(datum)
  else
    @stack.error_call(datum)
  end
end