chunked

config.ru

class Page
  def each
    loop do
      yield %w(one two thee four five).sample
      sleep 1
    end
  end
end

use Rack::Chunked

app = ->(env) {
  [
    200,
    { "Content-Type" => "text/plain" },
    Page.new,
  ]
}

run app

gistfile1.txt

# window 1
$ rackup -s puma

# window 2
$ curl -i --raw http://localhost:9292