You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: attachments_downloader.rb
    path of file: ./repos/gitlabhq/lib/gitlab/github_import
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Gitlab
  module GithubImport
    class AttachmentsDownloader
      include ::Gitlab::ImportExport::CommandLineUtil
      include ::BulkImports::FileDownloads::FilenameFetch
      include 
    
      def download_from(url)
        file = File.open(filepath, 'wb')

        Gitlab::HTTP.perform_request(Net::HTTP::Get, url, stream_body: true) do |chunk|
          next if [301, 302, 303, 307, 308].include?(chunk.code)

          raise DownloadError, "Error downloading file from #{url}. Error code: #{chunk.code}" if chunk.code != 200

          file.write(chunk)
          validate_size!(file.size)
        rescue Gitlab::GithubImport::AttachmentsDownloader::DownloadError
          delete
          raise
        end

        file
      end

      def filepath
        @filepath ||= begin
          dir = File.join(TMP_DIR, SecureRandom.uuid)
          mkdir_p dir
          File.join(dir, filename)
        end
      end