# ri > Puma::NullIO

## [Puma::NullIO](https://www.chedong.com/phpMan.php/perldoc/Puma%3A%3ANullIO/markdown) < Object

(from /home/chedong/.local/share/rdoc)
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Provides an IO-like object that always appears to contain no data. Used
as the value for rack.input when the request has no body.
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## Instance methods:

  close
  each
  eof?
  flush
  gets
  puts
  read
  rewind
  size
  string
  sync
  sync=
  write