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path: root/lib/gitlab/workhorse.rb
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require 'base64'
require 'json'

module Gitlab
  class Workhorse
    SEND_DATA_HEADER = 'Gitlab-Workhorse-Send-Data'

    class << self
      def send_git_blob(repository, blob)
        params = {
          'RepoPath' => repository.path_to_repo,
          'BlobId' => blob.id,
        }

        [
          SEND_DATA_HEADER,
          "git-blob:#{encode(params)}",
        ]
      end

      def send_git_archive(project, ref, format)
        format ||= 'tar.gz'
        format.downcase!
        params = project.repository.archive_metadata(ref, Gitlab.config.gitlab.repository_downloads_path, format)
        raise "Repository or ref not found" if params.empty?

        [
          SEND_DATA_HEADER,
          "git-archive:#{encode(params)}",
        ]
      end
      
      protected
      
      def encode(hash)
        Base64.urlsafe_encode64(JSON.dump(hash))
      end
    end
  end
end