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1
18
19 package org.apache.roller.ui.rendering.servlets;
20
21 import java.io.IOException  ;
22 import java.io.PrintWriter ;
23 import java.sql.Timestamp ;
24 import java.util.Date ;
25 import javax.servlet.ServletException ;
26 import javax.servlet.http.HttpServlet ;
27 import javax.servlet.http.HttpServletRequest ;
28 import javax.servlet.http.HttpServletResponse ;
29 import org.apache.commons.logging.Log;
30 import org.apache.commons.logging.LogFactory;
31 import org.apache.roller.RollerException;
32 import org.apache.roller.config.RollerRuntimeConfig;
33 import org.apache.roller.model.RollerFactory;
34 import org.apache.roller.model.UserManager;
35 import org.apache.roller.model.WeblogManager;
36 import org.apache.roller.pojos.CommentData;
37 import org.apache.roller.pojos.WeblogEntryData;
38 import org.apache.roller.pojos.WebsiteData;
39 import org.apache.roller.ui.rendering.util.WeblogTrackbackRequest;
40 import org.apache.roller.util.LinkbackExtractor;
41 import org.apache.roller.util.SpamChecker;
42 import org.apache.roller.util.URLUtilities;
43 import org.apache.roller.util.cache.CacheManager;
44 import org.apache.struts.util.RequestUtils;
45
46
47
55 public class TrackbackServlet extends HttpServlet {
56
57 private static Log logger = LogFactory.getLog(TrackbackServlet.class);
58
59
60
65 public void doGet(HttpServletRequest request, HttpServletResponse response)
66 throws IOException , ServletException {
67
68 response.sendError(HttpServletResponse.SC_NOT_FOUND);
69 }
70
71
72
77 public void doPost(HttpServletRequest request, HttpServletResponse response)
78 throws ServletException , IOException {
79
80 String error = null;
81 PrintWriter pw = response.getWriter();
82
83 WebsiteData weblog = null;
84 WeblogEntryData entry = null;
85
86 WeblogTrackbackRequest trackbackRequest = null;
87 if(!RollerRuntimeConfig.getBooleanProperty("users.trackbacks.enabled")) {
88 error = "Trackbacks are disabled for this site";
89 } else {
90
91 try {
92 trackbackRequest = new WeblogTrackbackRequest(request);
93
94 if((trackbackRequest.getTitle() == null) ||
95 "".equals(trackbackRequest.getTitle())) {
96 trackbackRequest.setTitle(trackbackRequest.getUrl());
97 }
98
99 if(trackbackRequest.getExcerpt() == null) {
100 trackbackRequest.setExcerpt("");
101 } else if(trackbackRequest.getExcerpt().length() >= 255) {
102 trackbackRequest.setExcerpt(trackbackRequest.getExcerpt().substring(0, 252)+"...");
103 }
104
105 UserManager uMgr = RollerFactory.getRoller().getUserManager();
107 weblog = uMgr.getWebsiteByHandle(trackbackRequest.getWeblogHandle());
108
109 if(weblog == null) {
110 throw new RollerException("unable to lookup weblog: "+
111 trackbackRequest.getWeblogHandle());
112 }
113
114 WeblogManager weblogMgr = RollerFactory.getRoller().getWeblogManager();
116 entry = weblogMgr.getWeblogEntryByAnchor(weblog, trackbackRequest.getWeblogAnchor());
117
118 if(entry == null) {
119 throw new RollerException("unable to lookup entry: "+
120 trackbackRequest.getWeblogAnchor());
121 }
122
123 } catch (Exception e) {
124 logger.debug("error creating page request", e);
126 error = e.getMessage();
127 }
128 }
129
130 if(error != null) {
131 pw.println(this.getErrorResponse(error));
132 return;
133 }
134
135 try {
136 boolean siteAllows = weblog.getAllowComments().booleanValue();
137 boolean verified = true;
138
139 if (entry!=null && siteAllows && entry.getCommentsStillAllowed()) {
140
141 CommentData comment = new CommentData();
143 comment.setContent("[Trackback] "+trackbackRequest.getExcerpt());
144 comment.setName(trackbackRequest.getBlogName());
145 comment.setUrl(trackbackRequest.getUrl());
146 comment.setWeblogEntry(entry);
147 comment.setNotify(Boolean.FALSE);
148 comment.setPostTime(new Timestamp (new Date ().getTime()));
149
150 SpamChecker checker = new SpamChecker();
152 if (checker.checkTrackback(comment)) {
153 comment.setSpam(Boolean.TRUE);
154 logger.debug("Trackback blacklisted: "+comment.getUrl());
155 error = "REJECTED: trackback contains spam words";
156 }
157 else if (RollerRuntimeConfig.getBooleanProperty(
159 "site.trackbackVerification.enabled")) {
160
161 LinkbackExtractor linkback = new LinkbackExtractor(
163 comment.getUrl(), URLUtilities.getWeblogEntryURL(weblog, null, entry.getAnchor(), true));
164 if (linkback.getExcerpt() == null) {
165 comment.setPending(Boolean.TRUE);
166 comment.setApproved(Boolean.FALSE);
167 verified = false;
168 error = "REJECTED: trackback failed verification";
170 logger.debug("Trackback failed verification: "+comment.getUrl());
171 }
172 }
173
174 if (error == null) {
175 if (verified && weblog.getCommentModerationRequired()) {
177 comment.setPending(Boolean.TRUE);
178 comment.setApproved(Boolean.FALSE);
179 } else if (verified) {
180 comment.setPending(Boolean.FALSE);
181 comment.setApproved(Boolean.TRUE);
182 }
183
184 WeblogManager mgr = RollerFactory.getRoller().getWeblogManager();
186 mgr.saveComment(comment);
187 RollerFactory.getRoller().flush();
188
189 CacheManager.invalidate(comment);
191
192 String rootURL = RollerRuntimeConfig.getAbsoluteContextURL();
194 if (rootURL == null || rootURL.trim().length()==0) {
195 rootURL = RequestUtils.serverURL(request) + request.getContextPath();
196 }
197 CommentServlet.sendEmailNotification(comment, rootURL);
198
199 if(comment.getPending().booleanValue()) {
200 pw.println(this.getSuccessResponse("Trackback submitted to moderator"));
201 } else {
202 pw.println(this.getSuccessResponse("Trackback accepted"));
203 }
204 }
205
206 } else if (entry!=null) {
207 error = "Comments and Trackbacks are disabled for the entry you specified.";
208 } else {
209 error = "Entry not specified.";
210 }
211
212 } catch (Exception e) {
213 error = e.getMessage();
214 if ( error == null ) {
215 error = e.getClass().getName();
216 }
217 }
218
219 if(error!= null) {
220 pw.println(this.getErrorResponse(error));
221 }
222
223 }
224
225
226 private String getSuccessResponse(String message) {
227
228 StringBuffer output = new StringBuffer ();
229
230 output.append("<?xml version=\"1.0\" encoding=\"iso-8859-1\"?>");
231 output.append("<response>");
232 output.append("<error>0</error>");
233 output.append("<message>");
234 output.append(message);
235 output.append("</message>");
236 output.append("</response>");
237
238 return output.toString();
239 }
240
241
242 private String getErrorResponse(String message) {
243
244 StringBuffer output = new StringBuffer ();
245
246 output.append("<?xml version=\"1.0\" encoding=\"iso-8859-1\"?>");
247 output.append("<response>");
248 output.append("<error>1</error>");
249 output.append("<message>ERROR: ");
250 output.append(message);
251 output.append("</message>");
252 output.append("</response>");
253
254 return output.toString();
255 }
256
257 } |
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