ReCaptchaService.java

/*
 * Copyright (c) 2014 Martin W. Kirst (nitram509 at bitkings dot de)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package net.nitram509.recaptcha;

import net.nitram509.config.EnvironmentConfig;
import net.nitram509.config.Optional;
import net.tanesha.recaptcha.ReCaptcha;
import net.tanesha.recaptcha.ReCaptchaFactory;
import net.tanesha.recaptcha.ReCaptchaImpl;
import net.tanesha.recaptcha.ReCaptchaResponse;

public class ReCaptchaService {

  private Optional config = new EnvironmentConfig();
  private final ReCaptchaImpl reCaptcha;

  public ReCaptchaService() {
    reCaptcha = new ReCaptchaImpl();
    reCaptcha.setPrivateKey(config.reCaptchaPrivateKey());
  }

  public String createCaptchaHtml() {
    if (config.hasCaptchaKeys()) {
      ReCaptcha reCaptcha = ReCaptchaFactory.newSecureReCaptcha(config.reCaptchaPublicKey(), config.reCaptchaPrivateKey(), false);
      return reCaptcha.createRecaptchaHtml(null, null);
    }
    return "";
  }

  public boolean isValidCaptcha(String remoteAddr, String recaptchaChallenge, String recaptchaResponse) {
    if (config.hasCaptchaKeys()) {
      ReCaptchaResponse reCaptchaResponse = reCaptcha.checkAnswer(remoteAddr, recaptchaChallenge, recaptchaResponse);
      return reCaptchaResponse.isValid();
    }
    return true;
  }

}