# File estraierpure.rb, line 671
    def get_doc_attr(id, name)
      Utility::check_types({ id=>Integer, name=>String }) if $DEBUG
      @status = -1
      return nil unless @url
      turl = @url + "/get_doc_attr"
      reqheads = [ "Content-Type: application/x-www-form-urlencoded" ]
      reqheads.push("Authorization: Basic " + Utility::base_encode(@auth)) if @auth
      reqbody = "id=" + id.to_s + "&attr=" + CGI::escape(name)
      resbody = StringIO::new
      rv = Utility::shuttle_url(turl, @pxhost, @pxport, @timeout, reqheads, reqbody, nil, resbody)
      @status = rv
      return nil if rv != 200
      resbody.string.chomp
    end