Export embedded attachments to Word

Hello,

How to export Confluence Page to Word with preserving attachments.

My code is:

public String execute() throws Exception {
          
        final PageContext context = page.toPageContext();
        String pageContent = page.getBodyContent().getContent().getBodyAsString();


        String newResult = xhtmlContent.(pageContent, new DefaultConversionContext(context));
        StringBuilder contentDispositionValue = new StringBuilder();
        contentDispositionValue.append(newResult);
        final HttpServletResponse response = ServletActionContext.getResponse();
        response.setHeader("content-type", "application/vnd.ms-word; charset=UTF-8");
        response.addHeader("Content-Disposition", "attachment;filename=spec.doc");
        
        response.getWriter().write(String.valueOf(contentDispositionValue));
        response.getWriter().close();
        response.getWriter().flush();
        
        return "success";
    }

After performing export the image is disappeared:

Please, your help,
Thank you,

Viktorya