# File lib/bundler/fetcher.rb, line 80
    def fetch_spec(spec)
      spec -= [nil, "ruby", ""]
      spec_file_name = "#{spec.join "-"}.gemspec"

      uri = URI.parse("#{remote_uri}#{Gem::MARSHAL_SPEC_DIR}#{spec_file_name}.rz")
      if uri.scheme == "file"
        Bundler.load_marshal Gem.inflate(Gem.read_binary(uri.path))
      elsif cached_spec_path = gemspec_cached_path(spec_file_name)
        Bundler.load_gemspec(cached_spec_path)
      else
        Bundler.load_marshal Gem.inflate(downloader.fetch uri)
      end
    rescue MarshalError
      raise HTTPError, "Gemspec #{spec} contained invalid data.\n" \
        "Your network or your gem server is probably having issues right now."
    end