{
LOG.debug("challenge {}->{}",session.getId(),_formLoginPage);
Response base_response = HttpChannel.getCurrentHttpChannel().getResponse();
Request base_request = HttpChannel.getCurrentHttpChannel().getRequest();
int redirectCode = (base_request.getHttpVersion().getVersion() < HttpVersion.HTTP_1_1.getVersion() ? HttpServletResponse.SC_MOVED_TEMPORARILY : HttpServletResponse.SC_SEE_OTHER);
base_response.sendRedirect(redirectCode, response.encodeRedirectURL(URIUtil.addPaths(request.getContextPath(),_formLoginPage)));
}
return Authentication.SEND_CONTINUE;
}
catch (IOException | ServletException e)
{