SimpleCaptchaImpl.java 文件源码

protected boolean validateChallenge(PortletRequest portletRequest)
    throws CaptchaException {

    PortletSession portletSession = portletRequest.getPortletSession();

    String captchaText = (String)portletSession.getAttribute(
        WebKeys.CAPTCHA_TEXT);

    if (captchaText == null) {
        _log.error(
            "Captcha text is null. User " + portletRequest.getRemoteUser() +
                " may be trying to circumvent the captcha.");

        throw new CaptchaTextException();
    }

    boolean valid = captchaText.equals(
        ParamUtil.getString(portletRequest, "captchaText"));

    if (valid) {
        portletSession.removeAttribute(WebKeys.CAPTCHA_TEXT);
    }

    return valid;
}