|
1
43
44 package net.jforum.util;
45
46 import java.awt.Color  ;
47 import java.awt.image.BufferedImage ;
48 import java.io.IOException ;
49 import java.io.OutputStream ;
50 import java.util.ArrayList ;
51 import java.util.Iterator ;
52 import java.util.List ;
53
54 import javax.imageio.ImageIO ;
55
56 import net.jforum.JForumExecutionContext;
57 import net.jforum.SessionFacade;
58 import net.jforum.util.preferences.ConfigKeys;
59 import net.jforum.util.preferences.SystemGlobals;
60
61 import org.apache.log4j.Logger;
62
63 import com.octo.captcha.component.image.backgroundgenerator.BackgroundGenerator;
64 import com.octo.captcha.component.image.backgroundgenerator.FunkyBackgroundGenerator;
65 import com.octo.captcha.component.image.backgroundgenerator.GradientBackgroundGenerator;
66 import com.octo.captcha.component.image.fontgenerator.FontGenerator;
67 import com.octo.captcha.component.image.fontgenerator.TwistedAndShearedRandomFontGenerator;
68 import com.octo.captcha.component.image.textpaster.RandomTextPaster;
69 import com.octo.captcha.component.image.textpaster.TextPaster;
70 import com.octo.captcha.component.image.wordtoimage.ComposedWordToImage;
71 import com.octo.captcha.component.image.wordtoimage.WordToImage;
72 import com.octo.captcha.component.wordgenerator.RandomWordGenerator;
73 import com.octo.captcha.component.wordgenerator.WordGenerator;
74 import com.octo.captcha.engine.image.ListImageCaptchaEngine;
75 import com.octo.captcha.image.ImageCaptchaFactory;
76 import com.octo.captcha.image.gimpy.GimpyFactory;
77
78
82 public class Captcha extends ListImageCaptchaEngine
83 {
84 private static final Logger logger = Logger.getLogger(Captcha.class);
85
86 private static Captcha classInstance = new Captcha();
87 private List backgroundGeneratorList;
88 private List textPasterList;
89 private List fontGeneratorList;
90
91 private static final String charsInUse = "123456789ABCDEFGHJLKMNPRSTWXYZabcdefghijlmnopkrstuvxzyk@#%^";
92
93
98 public static Captcha getInstance()
99 {
100 return classInstance;
101 }
102
103 protected void buildInitialFactories()
104 {
105 this.backgroundGeneratorList = new ArrayList ();
106 this.textPasterList = new ArrayList ();
107 this.fontGeneratorList = new ArrayList ();
108
109 int width = SystemGlobals.getIntValue(ConfigKeys.CAPTCHA_WIDTH);
110 int height = SystemGlobals.getIntValue(ConfigKeys.CAPTCHA_HEIGHT);
111 int minWords = SystemGlobals.getIntValue(ConfigKeys.CAPTCHA_MIN_WORDS);
112 int maxWords = SystemGlobals.getIntValue(ConfigKeys.CAPTCHA_MAX_WORDS);
113 int minFontSize = SystemGlobals.getIntValue(ConfigKeys.CAPTCHA_MIN_FONT_SIZE);
114 int maxFontSize = SystemGlobals.getIntValue(ConfigKeys.CAPTCHA_MAX_FONT_SIZE);
115
116 this.backgroundGeneratorList.add(new GradientBackgroundGenerator(new Integer (width),
117 new Integer (height), Color.BLACK, Color.GRAY));
118 this.backgroundGeneratorList.add(new FunkyBackgroundGenerator(new Integer (250), new Integer (50)));
119
120 this.textPasterList.add(new RandomTextPaster(new Integer (minWords), new Integer (maxWords), Color.RED));
121 this.textPasterList.add(new RandomTextPaster(new Integer (minWords), new Integer (maxWords), Color.ORANGE));
122 this.textPasterList.add(new RandomTextPaster(new Integer (minWords), new Integer (maxWords), Color.BLUE));
123 this.textPasterList.add(new RandomTextPaster(new Integer (minWords), new Integer (maxWords), Color.WHITE));
124 this.textPasterList.add(new RandomTextPaster(new Integer (minWords), new Integer (maxWords), Color.GREEN));
125 this.textPasterList.add(new RandomTextPaster(new Integer (minWords), new Integer (maxWords), Color.GRAY));
126 this.textPasterList.add(new RandomTextPaster(new Integer (minWords), new Integer (maxWords), Color.YELLOW));
127
128 this.fontGeneratorList.add(new TwistedAndShearedRandomFontGenerator(new Integer (minFontSize), new Integer (maxFontSize)));
129
130 WordGenerator words = new RandomWordGenerator(charsInUse);
132
133 for (Iterator fontIter = this.fontGeneratorList.iterator(); fontIter.hasNext();) {
134 FontGenerator fontGeny = (FontGenerator) fontIter.next();
135
136 for (Iterator backIter = this.backgroundGeneratorList.iterator(); backIter.hasNext();) {
137 BackgroundGenerator bkgdGeny = (BackgroundGenerator) backIter.next();
138
139 for (Iterator textIter = this.textPasterList.iterator(); textIter.hasNext();) {
140 TextPaster textPaster = (TextPaster) textIter.next();
141
142 WordToImage word2image = new ComposedWordToImage(fontGeny, bkgdGeny, textPaster);
143
144 ImageCaptchaFactory factory = new GimpyFactory(words, word2image);
146
147 addFactory(factory);
149 }
150 }
151 }
152 }
153
154 public void writeCaptchaImage()
155 {
156 BufferedImage image = SessionFacade.getUserSession().getCaptchaImage();
157
158 if (image == null) {
159 return;
160 }
161
162 OutputStream outputStream = null;
163
164 try {
165 outputStream = JForumExecutionContext.getResponse().getOutputStream();
166 ImageIO.write(image, "jpg", outputStream);
167 }
168 catch (IOException ex) {
169 logger.error(ex);
170 }
171 finally {
172 if (outputStream != null) {
173 try {
174 outputStream.close();
175 }
176 catch (IOException ex) {}
177 }
178 }
179 }
180 }
181 |
Popular Tags |
Java API By Example, From Geeks To Geeks.