s3secure.rb

# A secure S3 storage engine for Paperclip.
# Usage:
#
# require "paperclip/storage/s3secure"
# has_attached_file :image, :storage => :S3secure, …

module Paperclip::Storage::S3secure
  def self.extended base
    base.extend(Paperclip::Storage::S3)
    base.options[:s3_permissions] = :private
  end

  def url(style = default_style, include_updated_timestamp = false)
    s3_options = {:expires_in => 10.minutes}
    AWS::S3::S3Object.url_for path(style), options[:bucket], s3_options
  end
end