private boolean validateCaptchaChallenge(final HttpServletRequest request) {
try {
String captchaID = request.getSession().getId();
String challengeResponse = request.getParameter(captchaParamterName);
if (autoPassValue != null && autoPassValue.equals(challengeResponse)) {
return true;
}
return captchaService.validateResponseForID(captchaID, challengeResponse);
} catch (CaptchaServiceException e) {
logger.error(e.getMessage(), e);
return false;
}
}
private void genernateCaptchaImage(
final HttpServletRequest request, final HttpServletResponse response) throws IOException {
response.setHeader("Cache-Control", "no-store");
response.setHeader("Pragma", "no-cache");
response.setDateHeader("Expires", 0);
response.setContentType("image/jpeg");
ServletOutputStream out = response.getOutputStream();
try {
String captchaId = request.getSession(true).getId();
BufferedImage challenge =
(BufferedImage) captchaService.getChallengeForID(captchaId, request.getLocale());
ImageIO.write(challenge, "jpg", out);
out.flush();
} catch (CaptchaServiceException e) {
logger.error(e.getMessage(), e);
} finally {
out.close();
}
}