/*
* Copyright (c) JForum Team
* All rights reserved.
*
* Redistribution and use in source and binary forms,
* with or without modification, are permitted provided
* that the following conditions are met:
*
* 1) Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* 2) Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and
* the following disclaimer in the documentation and/or
* other materials provided with the distribution.
* 3) Neither the name of "Rafael Steil" nor
* the names of its contributors may be used to endorse
* or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT
* HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
* IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
*
* This file creation date: Nov 13, 2004 / 17:17:09
* The JForum Project
* http://www.jforum.net
*/
package net.jforum.util;
import java.awt.Color;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.imageio.ImageIO;
import net.jforum.JForumExecutionContext;
import net.jforum.SessionFacade;
import net.jforum.util.preferences.ConfigKeys;
import net.jforum.util.preferences.SystemGlobals;
import org.apache.log4j.Logger;
import com.octo.captcha.component.image.backgroundgenerator.BackgroundGenerator;
import com.octo.captcha.component.image.backgroundgenerator.GradientBackgroundGenerator;
import com.octo.captcha.component.image.fontgenerator.FontGenerator;
import com.octo.captcha.component.image.fontgenerator.TwistedAndShearedRandomFontGenerator;
import com.octo.captcha.component.image.textpaster.RandomTextPaster;
import com.octo.captcha.component.image.textpaster.TextPaster;
import com.octo.captcha.component.image.wordtoimage.ComposedWordToImage;
import com.octo.captcha.component.image.wordtoimage.WordToImage;
import com.octo.captcha.component.wordgenerator.RandomWordGenerator;
import com.octo.captcha.component.wordgenerator.WordGenerator;
import com.octo.captcha.engine.image.ListImageCaptchaEngine;
import com.octo.captcha.image.ImageCaptchaFactory;
import com.octo.captcha.image.gimpy.GimpyFactory;
/**
* @author James Yong
* @version $Id: Captcha.java,v 1.13 2007/08/06 15:38:01 rafaelsteil Exp $
*/
public class Captcha extends ListImageCaptchaEngine
{
private static final Logger logger = Logger.getLogger(Captcha.class);
private static Captcha classInstance = new Captcha();
private List backgroundGeneratorList;
private List textPasterList;
private List fontGeneratorList;
private static String charsInUse;
private void initializeChars()
{
if (SystemGlobals.getBoolValue(ConfigKeys.CAPTCHA_IGNORE_CASE)) {
charsInUse = "123456789abcdefghijlmnopkrstuvxzyk@#%^";
}
else {
charsInUse = "123456789ABCDEFGHJLKMNPRSTWXYZabcdefghijlmnopkrstuvxzyk@#%^";
}
}
/**
* Gets the singleton
*
* @return Instance of Captcha class
*/
public static Captcha getInstance()
{
return classInstance;
}
protected void buildInitialFactories()
{
this.initializeChars();
this.backgroundGeneratorList = new ArrayList();
this.textPasterList = new ArrayList();
this.fontGeneratorList = new ArrayList();
int width = SystemGlobals.getIntValue(ConfigKeys.CAPTCHA_WIDTH);
int height = SystemGlobals.getIntValue(ConfigKeys.CAPTCHA_HEIGHT);
int minWords = SystemGlobals.getIntValue(ConfigKeys.CAPTCHA_MIN_WORDS);
int maxWords = SystemGlobals.getIntValue(ConfigKeys.CAPTCHA_MAX_WORDS);
int minFontSize = SystemGlobals.getIntValue(ConfigKeys.CAPTCHA_MIN_FONT_SIZE);
int maxFontSize = SystemGlobals.getIntValue(ConfigKeys.CAPTCHA_MAX_FONT_SIZE);
this.backgroundGeneratorList.add(new GradientBackgroundGenerator(new Integer(width),
new Integer(height), Color.PINK, Color.LIGHT_GRAY));
this.backgroundGeneratorList.add(new GradientBackgroundGenerator(new Integer(width),
new Integer(height), Color.WHITE, Color.RED));
this.backgroundGeneratorList.add(new GradientBackgroundGenerator(new Integer(width),
new Integer(height), Color.ORANGE, Color.LIGHT_GRAY));
this.backgroundGeneratorList.add(new GradientBackgroundGenerator(new Integer(width),
new Integer(height), Color.CYAN, Color.LIGHT_GRAY));
//this.backgroundGeneratorList.add(new FunkyBackgroundGenerator(new Integer(250), new Integer(50)));
this.textPasterList.add(new RandomTextPaster(new Integer(minWords), new Integer(maxWords), Color.DARK_GRAY));
this.textPasterList.add(new RandomTextPaster(new Integer(minWords), new Integer(maxWords), Color.BLUE));
this.textPasterList.add(new RandomTextPaster(new Integer(minWords), new Integer(maxWords), Color.GREEN));
this.textPasterList.add(new RandomTextPaster(new Integer(minWords), new Integer(maxWords), Color.MAGENTA));
this.textPasterList.add(new RandomTextPaster(new Integer(minWords), new Integer(maxWords), Color.BLACK));
this.textPasterList.add(new RandomTextPaster(new Integer(minWords), new Integer(maxWords), Color.WHITE));
this.fontGeneratorList.add(new TwistedAndShearedRandomFontGenerator(new Integer(minFontSize), new Integer(maxFontSize)));
// Create a random word generator
WordGenerator words = new RandomWordGenerator(charsInUse);
for (Iterator fontIter = this.fontGeneratorList.iterator(); fontIter.hasNext();) {
FontGenerator fontGeny = (FontGenerator) fontIter.next();
for (Iterator backIter = this.backgroundGeneratorList.iterator(); backIter.hasNext();) {
BackgroundGenerator bkgdGeny = (BackgroundGenerator) backIter.next();
for (Iterator textIter = this.textPasterList.iterator(); textIter.hasNext();) {
TextPaster textPaster = (TextPaster) textIter.next();
WordToImage word2image = new ComposedWordToImage(fontGeny, bkgdGeny, textPaster);
// Creates a ImageCaptcha Factory
ImageCaptchaFactory factory = new GimpyFactory(words, word2image);
// Add a factory to the gimpy list (A Gimpy is a ImagCaptcha)
addFactory(factory);
}
}
}
}
public void writeCaptchaImage()
{
BufferedImage image = SessionFacade.getUserSession().getCaptchaImage();
if (image == null) {
return;
}
OutputStream outputStream = null;
try {
outputStream = JForumExecutionContext.getResponse().getOutputStream();
ImageIO.write(image, "jpg", outputStream);
}
catch (IOException ex) {
logger.error(ex);
}
finally {
if (outputStream != null) {
try {
outputStream.close();
}
catch (IOException ex) {}
}
}
}
}