gitlab-org--gitlab-foss/app/controllers/projects/repositories_controller.rb

class Projects::RepositoriesController < Projects::ApplicationController
  # Authorize
  before_filter :authorize_read_project!
  before_filter :authorize_code_access!
  before_filter :require_non_empty_project

  def archive
    unless can?(current_user, :download_code, @project)
      render_404 and return
    end

    file_path = ArchiveRepositoryService.new.execute(@project, params[:ref], params[:format])

    if file_path
      # Send file to user
      response.headers["Content-Length"] = File.open(file_path).size.to_s
      send_file file_path
    else
      render_404
    end
  end
end