ethon: stream response into file.

multiple_requests.rb

require 'ethon'

multi = Ethon::Multi.new

[
  "http://cvcl.mit.edu/hybrid/cat2.jpg",
  "http://www.petscareblog.com/wp-content/uploads/2011/03/kucing.jpg",
  "http://www.great-printable-calendars.com/image-files/cat-calendars-cat2.jpg"
].each_with_index{ |url, index|
  easy = Ethon::Easy.new(url: url)
  easy.prepare
  easy.response_body = File.open("cat_#{index}.jpg", 'w')
  easy.on_complete { |e| e.response_body.close; p "ready" }
  multi.add easy
}

multi.perform

single_request.rb

require 'ethon'
e = Ethon::Easy.new(url: "http://cvcl.mit.edu/hybrid/cat2.jpg")
e.prepare
e.response_body = File.open("cat.jpg", 'w')
e.on_complete { |e| e.response_body.close }
e.perform