How to download a file with Rails 4 Paperclip using s3

Question

I have a project that upload files attachments with paperclip and s3. How can I have users download these files.

Model

class Assets
  has_attached_file :file
end

Routes

resources :assets do
  member do
    get 'download'
  end
end

Controller

  def download
    data = open(@asset.file.url)
    send_data data.read, :type => data.content_type, :x_sendfile => true, :url_based_filename => true
  end

Error:

OpenURI::HTTPError in AssetsController#download

403 Forbidden

Answer 1

I found solution to this problem here

Answer:

def download
  extension = File.extname(@asset.file_file_name)
  send_data open("#{@asset.file.expiring_url(10000, :original)}").read, filename: "original_#{@asset.id}#{extension}", type: @asset.file_content_type
end