return LaRequestUtil.getOptionalRequest().map(req -> (String) req.getAttribute(FessConfig.VIRTUAL_HOST_VALUE)).orElseGet(() -> {
            final String value = processVirtualHost(s -> s, StringUtil.EMPTY);
            LaRequestUtil.getOptionalRequest().ifPresent(req -> req.setAttribute(FessConfig.VIRTUAL_HOST_VALUE, value));
            return value;
        });
    }

labels.user_favorite_enabled=Favorite Logging
labels.web_api_json_enabled=JSON Response
labels.app_value=System Properties
labels.default_label_value=Default Label Value
labels.default_sort_value=Default Sort Value
labels.virtual_host_value=Virtual Hosts
labels.append_query_param_enabled=Append Params to URL
labels.login_required=Login Required
labels.result_collapsed=Similar Result Collapsed
labels.login_link=Login Link

    String QUERY_GSA_RESPONSE_FIELDS = "queryGsaResponseFields";

    String THUMBNAIL_HTML_IMAGE_EXCLUDE_EXTENSIONS = "ThumbnailHtmlImageExcludeExtensions";

    String VIRTUAL_HOST_VALUE = "VirtualHostValue";

    String QUERY_DEFAULT_LANGUAGES = "queryDefaultLanguages";

    String HTML_PROXY = "httpProxy";

    String CRAWLER_FAILURE_URL_STATUS_CODES = "crawlerFailureUrlStatusCodes";

labels.facet_filetype_ruby=Ruby
labels.facet_filetype_scala=Scala
labels.facet_filetype_shell=Shell Script
labels.facet_filetype_vb=Visual Basic
labels.virtual_hosts=Virtual Hosts
labels.virtual_host=Virtual Host
labels.virtual_host_value=Virtual Hosts
labels.result_collapsed=Similar Result Collapsed
labels.log_level=Log Level
labels.crawling_info_thread_dump=Thread Dump
labels.key_match_urls=Urls
labels.data_crawling_button_create=Create

labels.web_api_json_enabled	=	Réponse JSON
labels.app_value	=	Propriétés du système
labels.default_label_value	=	Valeur d'étiquette par défaut
labels.default_sort_value	=	Valeur de tri par défaut
labels.virtual_host_value	=	Hôtes virtuels
labels.append_query_param_enabled	=	Ajouter des paramètres à l'URL
labels.login_required	=	Connexion requise
labels.result_collapsed	=	Résultat similaire réduit
labels.login_link	=	Lien de connexion

labels.user_favorite_enabled=Favorite Logging
labels.web_api_json_enabled=JSON Response
labels.app_value=System Properties
labels.default_label_value=Default Label Value
labels.default_sort_value=Default Sort Value
labels.virtual_host_value=Virtual Hosts
labels.append_query_param_enabled=Append Params to URL
labels.login_required=Login Required
labels.result_collapsed=Similar Result Collapsed
labels.login_link=Login Link

labels.web_api_json_enabled=JSON-Antwort
labels.app_value=Systemeigenschaften
labels.default_label_value=Standard-Labelwert
labels.default_sort_value=Standard-Sortierungswert
labels.virtual_host_value=Virtuelle Hosts
labels.append_query_param_enabled=Parameter an URL anhängen
labels.login_required=Anmeldung erforderlich
labels.result_collapsed=Ähnliche Ergebnisse eingeklappt
labels.login_link=Login-Link

labels.facet_filetype_ruby=Ruby
labels.facet_filetype_scala=Scala
labels.facet_filetype_shell=Shell Script
labels.facet_filetype_vb=Visual Basic
labels.virtual_hosts=Virtual Hosts
labels.virtual_host=Virtual Host
labels.virtual_host_value=Virtual Hosts
labels.result_collapsed=Similar Result Collapsed
labels.log_level=Log Level
labels.crawling_info_thread_dump=Thread Dump
labels.key_match_urls=Urls

labels.user_info_enabled=ユーザーログ
labels.user_favorite_enabled=お気に入りログ
labels.web_api_json_enabled=JSONレスポンス
labels.app_value=システムプロパティ
labels.default_label_value=デフォルトのラベル値
labels.default_sort_value=デフォルトのソート値
labels.virtual_host_value=仮想ホスト
labels.append_query_param_enabled=検索パラメーターの追加
labels.login_required=ログインが必要
labels.result_collapsed=重複結果の折り畳み
labels.login_link=ログインリンク表示
labels.thumbnail=サムネイル表示
labels.ignore_failure_type=除外するエラーの種類

    public static final String LABELS_default_sort_value = "{labels.default_sort_value}";

    /** The key of the message: Virtual Hosts */
    public static final String LABELS_virtual_host_value = "{labels.virtual_host_value}";

    /** The key of the message: Append Params to URL */
    public static final String LABELS_append_query_param_enabled = "{labels.append_query_param_enabled}";