module Excon::Utils

def connection_uri(datum = @data)
  unless datum
    raise ArgumentError, '`datum` must be given unless called on a Connection'
  end
  if datum[:scheme] == UNIX
    '' << datum[:scheme] << '://' << datum[:socket]
  else
    '' << datum[:scheme] << '://' << datum[:host] << port_string(datum)
  end
end