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1
31
32 package org.opencms.frontend.templateone.form;
33
34 import org.opencms.flex.CmsFlexController;
35 import org.opencms.i18n.CmsMessages;
36 import org.opencms.jsp.CmsJspActionElement;
37 import org.opencms.main.CmsLog;
38 import org.opencms.util.CmsStringUtil;
39
40 import java.awt.image.BufferedImage  ;
41 import java.io.ByteArrayOutputStream ;
42 import java.io.IOException ;
43 import java.util.Locale ;
44
45 import javax.servlet.ServletOutputStream ;
46 import javax.servlet.http.HttpServletResponse ;
47
48 import org.apache.commons.logging.Log;
49
50 import com.octo.captcha.CaptchaException;
51 import com.octo.captcha.service.image.ImageCaptchaService;
52 import com.sun.image.codec.jpeg.JPEGCodec;
53 import com.sun.image.codec.jpeg.JPEGImageEncoder;
54
55
65 public class CmsCaptchaField extends A_CmsField {
66
67
68 public static final String C_PARAM_CAPTCHA_PHRASE = "captchaphrase";
69
70
71 private static final Log LOG = CmsLog.getLog(CmsCaptchaField.class);
72
73
74 private static final String TYPE = "captcha";
75
76
77 private CmsCaptchaSettings m_captchaSettings;
78
79
87 public CmsCaptchaField(CmsCaptchaSettings captchaSettings, String fieldLabel, String fieldValue) {
88
89 super();
90
91 m_captchaSettings = captchaSettings;
92
93 setName(C_PARAM_CAPTCHA_PHRASE);
94 setValue(fieldValue);
95 setLabel(fieldLabel);
96 setMandatory(true);
97 }
98
99
105 public static String getStaticType() {
106
107 return TYPE;
108 }
109
110
114 public String buildHtml(CmsFormHandler formHandler, CmsMessages messages, String errorKey) {
115
116 StringBuffer buf = new StringBuffer ();
117 String fieldLabel = getLabel();
118 String errorMessage = "";
119 String mandatory = "";
120
121 CmsCaptchaSettings captchaSettings = getCaptchaSettings();
122
123 if (CmsStringUtil.isNotEmpty(errorKey)) {
124
125 if (CmsFormHandler.ERROR_MANDATORY.equals(errorKey)) {
126 errorMessage = messages.key("form.error.mandatory");
127 } else if (CmsStringUtil.isNotEmpty(getErrorMessage())) {
128 errorMessage = getErrorMessage();
129 } else {
130 errorMessage = messages.key("form.error.validation");
131 }
132
133 errorMessage = messages.key("form.html.error.start") + errorMessage + messages.key("form.html.error.end");
134 fieldLabel = messages.key("form.html.label.error.start")
135 + fieldLabel
136 + messages.key("form.html.label.error.end");
137 }
138
139 if (isMandatory()) {
140 mandatory = messages.key("form.html.mandatory");
141 }
142
143 buf.append(messages.key("form.html.row.start")).append("\n");
145
146 buf.append(messages.key("form.html.label.start")).append(fieldLabel).append(mandatory).append(
148 messages.key("form.html.label.end")).append("\n");
149
150 buf.append(messages.key("form.html.field.start")).append("\n");
152
153 buf.append("<img SRC=\"").append(
155 formHandler.link("/system/modules/org.opencms.frontend.templateone.form/pages/captcha?"
156 + captchaSettings.toRequestParams(formHandler.getCmsObject()))).append("\" width=\"").append(
157 captchaSettings.getImageWidth()).append("\" height=\"").append(captchaSettings.getImageHeight()).append(
158 "\" alt=\"\">").append("\n");
159
160 buf.append("<br>\n");
162
163 buf.append("<input type=\"text\" name=\"").append(getName()).append("\" value=\"").append(getValue()).append(
165 "\"").append(formHandler.getFormConfiguration().getFormFieldAttributes()).append(">").append(errorMessage).append(
166 messages.key("form.html.field.end")).append("\n");
167
168 buf.append(messages.key("form.html.row.end")).append("\n");
170
171 return buf.toString();
172 }
173
174
180 public CmsCaptchaSettings getCaptchaSettings() {
181
182 return m_captchaSettings;
183 }
184
185
188 public String getType() {
189
190 return TYPE;
191 }
192
193
201 public boolean validateCaptchaPhrase(CmsJspActionElement jsp, String captchaPhrase) {
202
203 boolean result = false;
204 String sessionId = jsp.getRequest().getSession().getId();
205
206 if (CmsStringUtil.isNotEmpty(captchaPhrase)) {
207
208 ImageCaptchaService captchaService = CmsCaptchaServiceCache.getSharedInstance().getCaptchaService(
209 m_captchaSettings,
210 jsp.getCmsObject());
211 if (captchaService != null) {
212 result = captchaService.validateResponseForID(sessionId, captchaPhrase).booleanValue();
213 }
214 }
215
216 return result;
217 }
218
219
226 public void writeCaptchaImage(CmsJspActionElement cms) throws IOException {
227
228 ByteArrayOutputStream captchaImageOutput = new ByteArrayOutputStream ();
229 ServletOutputStream out = null;
230 BufferedImage captchaImage = null;
231 int maxTries = 10;
232 do {
233 try {
234
235 maxTries--;
236 String sessionId = cms.getRequest().getSession().getId();
237 Locale locale = cms.getRequestContext().getLocale();
238
239 captchaImage = CmsCaptchaServiceCache.getSharedInstance().getCaptchaService(
240 m_captchaSettings,
241 cms.getCmsObject()).getImageChallengeForID(sessionId, locale);
242 } catch (CaptchaException cex) {
243 if (LOG.isErrorEnabled()) {
244 LOG.error(cex);
245 LOG.error(Messages.get().getBundle().key(
246 Messages.LOG_ERR_CAPTCHA_CONFIG_IMAGE_SIZE_2,
247 new Object [] {m_captchaSettings.getPresetPath(), new Integer (maxTries)}));
248 }
249 m_captchaSettings.setImageHeight(m_captchaSettings.getImageHeight() + 40);
250 m_captchaSettings.setImageWidth(m_captchaSettings.getImageWidth() + 80);
251 }
252 } while (captchaImage == null && maxTries > 0);
253 try {
254
255 JPEGImageEncoder jpegEncoder = JPEGCodec.createJPEGEncoder(captchaImageOutput);
256 jpegEncoder.encode(captchaImage);
257
258 CmsFlexController controller = CmsFlexController.getController(cms.getRequest());
259 HttpServletResponse response = controller.getTopResponse();
260 response.setHeader("Cache-Control", "no-store");
261 response.setHeader("Pragma", "no-cache");
262 response.setDateHeader("Expires", 0);
263 response.setContentType("image/jpeg");
264
265 out = cms.getResponse().getOutputStream();
266 out.write(captchaImageOutput.toByteArray());
267 out.flush();
268
269 } catch (Exception e) {
270
271 if (LOG.isErrorEnabled()) {
272 LOG.error(e);
273 }
274
275 cms.getResponse().sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
276 } finally {
277
278 try {
279 if (out != null) {
280 out.close();
281 }
282 } catch (Throwable t) {
283 }
285 }
286 }
287
288 }
289 |
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