Are there any "clean" alternatives to Unicorn for HTTP streaming?

Rails
#1

Are there any “clean” alternatives to Unicorn for HTTP streaming?

By “clean” I mean using the :stream option during render.

class MyController < ActionController::Base
def index
render :stream => true
end
end

#2

Unicorn is “clean”.

What I should have wrote is “In addition to Unicorn, are there any
other HTTP Servers, for Ruby on Rails, that “cleanly” support HTTP
streaming?”

Thank you!