@Override
    public List<ParamInfo> extractParam(HttpServletRequest request) throws NacosRuntimeException {
        ArrayList<ParamInfo> paramInfos = new ArrayList<>();
        String listenConfigs = request.getParameter("Listening-Configs");
        if (StringUtils.isBlank(listenConfigs)) {
            return paramInfos;
        }
        try {
            listenConfigs = URLDecoder.decode(listenConfigs, Constants.ENCODE);
        } catch (UnsupportedEncodingException e) {
            throw new NacosRuntimeException(ErrorCode.UnKnowError.getCode(), e);
        }
        if (StringUtils.isBlank(listenConfigs)) {
            return paramInfos;
        }
        String[] lines = listenConfigs.split(Character.toString(LINE_SEPARATOR_CHAR));
        for (String line : lines) {
            ParamInfo paramInfo = new ParamInfo();
            String[] words = line.split(Character.toString(WORD_SEPARATOR_CHAR));
            if (words.length < 2 || words.length > 4) {
                throw new IllegalArgumentException("invalid probeModify");
            }
            paramInfo.setDataId(words[0]);
            paramInfo.setGroup(words[1]);
            if (words.length == 4) {
                paramInfo.setNamespaceId(words[3]);
            }
            paramInfos.add(paramInfo);
        }
        return paramInfos;
    }
@Test
    void testNormal() {
        String listenerConfigsString = getListenerConfigsString();
        Mockito.when(httpServletRequest.getParameter(eq("Listening-Configs"))).thenReturn(listenerConfigsString);
        configListenerHttpParamExtractor = new ConfigListenerHttpParamExtractor();
        configListenerHttpParamExtractor.extractParam(httpServletRequest);
    }