* Constructs a new Hc4HttpClient.
     */
    public Hc4HttpClient() {
        // Default constructor
    }

    /** Helper for processing robots.txt files */
    @Resource
    protected RobotsTxtHelper robotsTxtHelper;

    /** Helper for managing content length limits */
    @Resource
    protected ContentLengthHelper contentLengthHelper;

    /** Helper for determining MIME types */
    @Resource

     * Constructs a new Hc5HttpClient.
     */
    public Hc5HttpClient() {
        // Default constructor
    }

    /** Helper for processing robots.txt files */
    @Resource
    protected RobotsTxtHelper robotsTxtHelper;

    /** Helper for managing content length limits */
    @Resource
    protected ContentLengthHelper contentLengthHelper;

    /** Helper for determining MIME types */
    @Resource

### Key Extractors

`TikaExtractor`, `PdfExtractor`, `MsWordExtractor`, `MsExcelExtractor`, `MsPowerPointExtractor`, `ZipExtractor`, `HtmlExtractor`, `MarkdownExtractor`, `EmlExtractor`

### Helpers

- **RobotsTxtHelper**: RFC 9309 parsing, user-agent matching, crawl-delay, sitemaps
- **SitemapsHelper**: Sitemap XML parsing, index handling
- **MimeTypeHelper**: MIME detection via Tika
- **EncodingHelper**: Charset detection with BOM