private void verifyAjaxToken(HttpServletRequest request) throws CsrfGuardException {
HttpSession session = request.getSession(true);
String tokenFromSession = (String) session.getAttribute(getSessionKey());
String tokenFromRequest = request.getHeader(getTokenName());
if (tokenFromRequest == null) {
/** FAIL: token is missing from the request * */
throw new CsrfGuardException("required token is missing from the request");
} else if (tokenFromRequest.indexOf(tokenFromSession) == -1) {
/** FAIL: the request token does not match the session token * */
throw new CsrfGuardException("request token does not match session token");
}
}
private boolean isAjaxRequest(HttpServletRequest request) {
return request.getHeader("X-Requested-With") != null;
}