\r\n as a row separator

How to configure \r\n as a row separator in logstash file input plugin.

path => ["/logs/*"]
start_position => "beginning"
type=>"API"
delimiter=>"\r\n"
close_older=>"300"
max_open_files=>"5000"
discover_interval=>5
ignore_older=>172800
sincedb_path=>"/apps/api.log"
}
Thank In advance

That shouldn't be necessary to do. Why do you feel you need this?