typhoeus example

gistfile1.rb

require 'rubygems'
require 'typhoeus'

hydra = Typhoeus::Hydra.new

# Create all your requests
request = Typhoeus::Request.new("http://your_image_url")
request.on_complete do |response|
  # Check if the returned data really is an image
  
  # Save the fetched file / image
  File.open(file_path, 'w+') do |file|
    file.write(response.body)
  end
  
  # Do some post processing like resizing
end

hydra.queue request
hydra.run