Image proxy in Rails

image_proxy_controller.rb

class ImageProxyController
  def show
    image  = open(params[:url]) {|f| f.read }
    send_data image, type: "image/jpeg", disposition: 'inline'
  end
end

image_proxy_example_url

http://localhost:3000/image_proxy/http%3A%2F%2Fwww.cs.cmu.edu%2F%7Echuck%2Flennapg%2Flen_std.jpg

routes.rb

  get 'image_proxy/*url' => 'image_proxy#show', constraints: { :url => /.*/ }