return LaRequestUtil.getOptionalRequest().map(request -> {
                final String userAgent = request.getHeader("user-agent");
                if (StringUtil.isBlank(userAgent)) {
                    return false;
                }

                return pathMapping.getUAMatcher(userAgent).find();
            }).orElse(false);
        }
        return false;
    }

this.clear();f=d[1]?d[1].toString():"",g=d[2]?d[2].toString():"",e.length>4&&(g=e.slice(-2),e=e.slice(0,-2)),e.length>2&&(f=e.slice(-2),e=e.slice(0,-2)),f.length>2&&(g=f.slice(-2),f=f.slice(0,-2)),e=parseInt(e,10),f=parseInt(f,10),g=parseInt(g,10),isNaN(e)&&(e=0),isNaN(f)&&(f=0),isNaN(g)&&(g=0),g>59&&(g=59),f>59&&(f=59),e>=this.maxHours&&(e=this.maxHours-1),this.showMeridian?(e>12&&(c=2,e-=12),c||(c=1),0===e&&(e=12),h=1===c?"AM":"PM"):12>e&&2===c?e+=12:e>=this.maxHours?e=this.maxHours-1:(0>e||12===e&&1===c)&&(e=...

        final ProcessHelper processHelper = ComponentUtil.getProcessHelper();
        final FessConfig fessConfig = ComponentUtil.getFessConfig();

        if (StringUtil.isBlank(filename)) {
            throw new JobProcessingException("Python script is not specified.");
        }

        cmdList.add(fessConfig.getPythonCommandPath());

        cmdList.add(getPyFilePath());

     */
    protected boolean isNewUrl(final UrlQueueImpl<Long> urlQueue, final Queue<UrlQueueImpl<Long>> urlQueueList) {

        final String url = urlQueue.getUrl();
        if (StringUtil.isBlank(url)) {
            if (logger.isDebugEnabled()) {
                logger.debug("URL is a blank: {}", url);
            }
            return false;
        }

        // check it in queue

     * @param extractor The extractor to add. Must not be null.
     */
    public void addExtractor(final String key, final Extractor extractor) {
        if (StringUtil.isBlank(key)) {
            throw new CrawlerSystemException("The key is null.");
        }
        if (extractor == null) {
            throw new CrawlerSystemException("The extractor is null.");
        }

     */
    protected String getThemeName(final Artifact artifact) {
        final String themeName = artifact.getName().substring(ArtifactType.THEME.getId().length() + 1);
        if (StringUtil.isBlank(themeName)) {
            throw new ThemeException("Theme name is empty: " + artifact);
        }
        return themeName;
    }

    /**
     * Recursively deletes a directory and all its contents.

     * @return CURL request object or null if header is invalid
     */
    private CurlRequest getCurlRequest(final String header) {
        if (StringUtil.isBlank(header)) {
            return null;
        }

        final String[] values = header.split(" ");
        if (values.length != 2) {
            return null;
        }

        final String path;

     * @param filename The filename to normalize.
     * @return The normalized filename.
     */
    protected String normalizeFilename(final String filename) {
        if (StringUtil.isBlank(filename)) {
            return filename;
        }
        final StringBuilder buf = new StringBuilder(filename.length() + 10);
        for (int i = 0; i < filename.length(); i++) {

     *
     * @param input the string to encode
     * @return encoded string, or the original input if blank
     */
    public static String sdh(final String input) {
        if (StringUtil.isBlank(input)) {
            return input;
        }
        return ComponentUtil.getDocumentHelper().encodeSimilarDocHash(input);
    }

    /**

        assertEquals("", basePath);

        basePath = virtualHostHelper.getVirtualHostBasePath("  ", new HtmlNext("/test"));
        assertEquals("", basePath); // StringUtil.isBlank considers whitespace as blank
    }

    public void test_getVirtualHostKey() {
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;