ru.org.linux.auth.CaptchaService.java Source code

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Here is the source code for ru.org.linux.auth.CaptchaService.java

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/*
 * Copyright 1998-2010 Linux.org.ru
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package ru.org.linux.auth;

import net.tanesha.recaptcha.ReCaptcha;
import net.tanesha.recaptcha.ReCaptchaException;
import net.tanesha.recaptcha.ReCaptchaResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.validation.Errors;

import javax.servlet.ServletRequest;

@Component
public class CaptchaService {
    private static final Log logger = LogFactory.getLog(CaptchaService.class);

    private ReCaptcha captcha;

    @Autowired
    public void setCaptcha(ReCaptcha captcha) {
        this.captcha = captcha;
    }

    public void checkCaptcha(ServletRequest request, Errors errors) {
        String captchaChallenge = request.getParameter("recaptcha_challenge_field");
        String captchaResponse = request.getParameter("recaptcha_response_field");

        if (captchaChallenge == null || captchaResponse == null) {
            errors.reject(null, "   ");
            return;
        }

        try {
            ReCaptchaResponse response = captcha.checkAnswer(request.getRemoteAddr(), captchaChallenge,
                    captchaResponse);

            if (!response.isValid()) {
                errors.reject(null, "   ?");
            }
        } catch (ReCaptchaException e) {
            logger.warn("Unable to check captcha", e);

            errors.reject(null, "Unable to check captcha: " + e.getMessage());
        }
    }
}