Examples with CaptchaHttpServletResponseWrapper org.wso2.carbon.identity.captcha.util.CaptchaHttpServletResponseWrapper used on opensource projects

Example 1 with CaptchaHttpServletResponseWrapper

use of org.wso2.carbon.identity.captcha.util.CaptchaHttpServletResponseWrapper in project identity-governance by wso2-extensions.

the class CaptchaFilter method doFilter.

@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
    try {
        if (!CaptchaDataHolder.getInstance().isReCaptchaEnabled()) {
            filterChain.doFilter(servletRequest, servletResponse);
            return;
        }
        // May need multiple reads of request body value from connectors.
        if (servletRequest instanceof HttpServletRequest) {
            String currentPath = ((HttpServletRequest) servletRequest).getRequestURI();
            if (StringUtils.isNotBlank(currentPath) && CaptchaUtil.isPathAvailable(currentPath, CaptchaDataHolder.getInstance().getReCaptchaRequestWrapUrls())) {
                servletRequest = new CaptchaHttpServletRequestWrapper((HttpServletRequest) servletRequest);
            }
        }
        List<CaptchaConnector> captchaConnectors = CaptchaDataHolder.getInstance().getCaptchaConnectors();
        CaptchaConnector selectedCaptchaConnector = null;
        for (CaptchaConnector captchaConnector : captchaConnectors) {
            if (captchaConnector.canHandle(servletRequest, servletResponse) && (selectedCaptchaConnector == null || captchaConnector.getPriority() > selectedCaptchaConnector.getPriority())) {
                selectedCaptchaConnector = captchaConnector;
            }
        }
        if (selectedCaptchaConnector == null) {
            filterChain.doFilter(servletRequest, servletResponse);
            return;
        }
        // Check whether captcha is required or will reach to the max failed attempts with the current attempt.
        CaptchaPreValidationResponse captchaPreValidationResponse = selectedCaptchaConnector.preValidate(servletRequest, servletResponse);
        if (captchaPreValidationResponse == null) {
            // Captcha connector failed to response. Default is success.
            filterChain.doFilter(servletRequest, servletResponse);
            return;
        }
        HttpServletRequest httpRequest = (HttpServletRequest) servletRequest;
        HttpServletResponse httpResponse = (HttpServletResponse) servletResponse;
        if (captchaPreValidationResponse.isCaptchaValidationRequired()) {
            try {
                boolean validCaptcha = selectedCaptchaConnector.verifyCaptcha(servletRequest, servletResponse);
                if (!validCaptcha) {
                    log.warn("Captcha validation failed for the user.");
                    httpResponse.sendRedirect(CaptchaUtil.getOnFailRedirectUrl(httpRequest.getHeader("referer"), captchaPreValidationResponse.getOnCaptchaFailRedirectUrls(), captchaPreValidationResponse.getCaptchaAttributes()));
                    return;
                }
            } catch (CaptchaClientException e) {
                log.warn("Captcha validation failed for the user. Cause : " + e.getMessage());
                httpResponse.sendRedirect(CaptchaUtil.getOnFailRedirectUrl(httpRequest.getHeader("referer"), captchaPreValidationResponse.getOnCaptchaFailRedirectUrls(), captchaPreValidationResponse.getCaptchaAttributes()));
                return;
            }
        }
        // Enable reCaptcha for the destination.
        if (captchaPreValidationResponse.isEnableCaptchaForRequestPath()) {
            if (captchaPreValidationResponse.getCaptchaAttributes() != null) {
                for (Map.Entry<String, String> parameter : captchaPreValidationResponse.getCaptchaAttributes().entrySet()) {
                    servletRequest.setAttribute(parameter.getKey(), parameter.getValue());
                }
            }
            doFilter(captchaPreValidationResponse, servletRequest, servletResponse, filterChain);
            return;
        }
        // Below the no. of max failed attempts, including the current attempt
        if (!captchaPreValidationResponse.isPostValidationRequired() || (!captchaPreValidationResponse.isCaptchaValidationRequired() && !captchaPreValidationResponse.isMaxFailedLimitReached())) {
            doFilter(captchaPreValidationResponse, servletRequest, servletResponse, filterChain);
            return;
        }
        CaptchaHttpServletResponseWrapper responseWrapper = new CaptchaHttpServletResponseWrapper(httpResponse);
        doFilter(captchaPreValidationResponse, servletRequest, responseWrapper, filterChain);
        CaptchaPostValidationResponse postValidationResponse = selectedCaptchaConnector.postValidate(servletRequest, responseWrapper);
        // Check whether this attempt is failed
        if (postValidationResponse == null || postValidationResponse.isSuccessfulAttempt()) {
            if (responseWrapper.isRedirect()) {
                httpResponse.sendRedirect(responseWrapper.getRedirectURL());
            }
            return;
        }
        if (postValidationResponse.isEnableCaptchaResponsePath() && responseWrapper.isRedirect()) {
            httpResponse.sendRedirect(CaptchaUtil.getUpdatedUrl(responseWrapper.getRedirectURL(), postValidationResponse.getCaptchaAttributes()));
        }
    } catch (CaptchaException e) {
        log.error("Error occurred in processing captcha.", e);
        ((HttpServletResponse) servletResponse).sendRedirect(CaptchaUtil.getErrorPage("Server Error", "Something " + "went wrong. Please try again"));
    }
}