def get(self):
        # TODO(sll): Figure out what to do about explorations in categories
        # other than those explicitly listed.

        query_string = self.request.get('q')
        search_cursor = self.request.get('cursor', None)
        exp_ids, search_cursor = (
            exp_services.get_exploration_ids_matching_query(
                query_string, cursor=search_cursor))

        explorations_list = (
            summary_services.get_displayable_exp_summary_dicts_matching_ids(
                exp_ids))

        if len(explorations_list) == feconf.DEFAULT_QUERY_LIMIT:
            logging.error(
                '%s explorations were fetched to load the gallery page. '
                'You may be running up against the default query limits.'
                % feconf.DEFAULT_QUERY_LIMIT)

        preferred_language_codes = [feconf.DEFAULT_LANGUAGE_CODE]
        if self.user_id:
            user_settings = user_services.get_user_settings(self.user_id)
            preferred_language_codes = user_settings.preferred_language_codes

        self.values.update({
            'explorations_list': explorations_list,
            'preferred_language_codes': preferred_language_codes,
            'search_cursor': search_cursor,
        })
        self.render_json(self.values)
Handles GET requests.
dataset/ETHPy150Open oppia/oppia/core/controllers/galleries.py/GalleryHandler.get