sr3 permalinks as attachments

example.rb

  # gets permalink for file on s3
  #
  # *Parameters:*
  # (+String+) -- aws_path full path of key to be uploaded to AWS (usually generated)
  #
  # *Returns:*
  # (+String+) -- url
  def self.get_permalink(aws_path, content_type = nil, content_disposition = nil)
    return nil if aws_path.blank?
    s3 = AWS::S3.new
    b = s3.buckets[@bucket]
    # b = s3.buckets.create(@bucket)
    o = b.objects[aws_path]
    return o.url_for(:read, :expires => 24.hours, :response_content_type => content_type, :response_content_disposition => content_disposition).to_s
  end

def download
@attachment = Attachment.find(params[:id])
redirect_to @attachment.resource.expiring_url(10)
end

@attachment.resource.expiring_url(10)
=> "https://s3.amazonaws.com/agencieshq-development/attachments/resources/1/89067933508c379c5fb9c9771e7a55a32a8eeb81/Tuquito%20-%20PAMI%20(1).pdf?AWSAccessKeyId=AKIAJMTMRV2CZYOOOUDA&Expires=1343675207&Signature=utM%2FLhM8WvYL%2BmscrhClr3FYL9U%3D"