1
22
23 package com.liferay.portlet.blogs.action;
24
25 import com.liferay.portal.kernel.log.Log;
26 import com.liferay.portal.kernel.log.LogFactoryUtil;
27 import com.liferay.portal.kernel.util.ContentTypes;
28 import com.liferay.portal.kernel.util.GetterUtil;
29 import com.liferay.portal.kernel.util.HttpUtil;
30 import com.liferay.portal.kernel.util.ParamUtil;
31 import com.liferay.portal.kernel.util.StringPool;
32 import com.liferay.portal.kernel.util.Validator;
33 import com.liferay.portal.security.auth.PrincipalException;
34 import com.liferay.portal.service.ServiceContext;
35 import com.liferay.portal.service.ServiceContextFactory;
36 import com.liferay.portal.service.UserLocalServiceUtil;
37 import com.liferay.portal.struts.ActionConstants;
38 import com.liferay.portal.struts.PortletAction;
39 import com.liferay.portal.theme.ThemeDisplay;
40 import com.liferay.portal.util.Portal;
41 import com.liferay.portal.util.PortalUtil;
42 import com.liferay.portal.util.WebKeys;
43 import com.liferay.portlet.PortletPreferencesFactoryUtil;
44 import com.liferay.portlet.blogs.NoSuchEntryException;
45 import com.liferay.portlet.blogs.model.BlogsEntry;
46 import com.liferay.portlet.blogs.util.TrackbackVerifierUtil;
47 import com.liferay.portlet.messageboards.model.MBMessage;
48 import com.liferay.portlet.messageboards.model.MBMessageDisplay;
49 import com.liferay.portlet.messageboards.model.MBThread;
50 import com.liferay.portlet.messageboards.service.MBMessageLocalServiceUtil;
51 import com.liferay.util.servlet.ServletResponseUtil;
52
53 import javax.portlet.ActionRequest;
54 import javax.portlet.ActionResponse;
55 import javax.portlet.PortletConfig;
56 import javax.portlet.PortletPreferences;
57
58 import javax.servlet.http.HttpServletRequest;
59 import javax.servlet.http.HttpServletResponse;
60
61 import org.apache.struts.action.ActionForm;
62 import org.apache.struts.action.ActionMapping;
63
64
69 public class TrackbackAction extends PortletAction {
70
71 public void processAction(
72 ActionMapping mapping, ActionForm form, PortletConfig portletConfig,
73 ActionRequest actionRequest, ActionResponse actionResponse)
74 throws Exception {
75
76 try {
77 addTrackback(actionRequest, actionResponse);
78 }
79 catch (NoSuchEntryException nsee) {
80 if (_log.isWarnEnabled()) {
81 _log.warn(nsee, nsee);
82 }
83 }
84 catch (Exception e) {
85 _log.error(e, e);
86 }
87
88 setForward(actionRequest, ActionConstants.COMMON_NULL);
89 }
90
91 protected void addTrackback(
92 ActionRequest actionRequest, ActionResponse actionResponse)
93 throws Exception {
94
95 ThemeDisplay themeDisplay = (ThemeDisplay)actionRequest.getAttribute(
96 WebKeys.THEME_DISPLAY);
97
98 String title = ParamUtil.getString(actionRequest, "title");
99 String excerpt = ParamUtil.getString(actionRequest, "excerpt");
100 String url = ParamUtil.getString(actionRequest, "url");
101 String blogName = ParamUtil.getString(actionRequest, "blog_name");
102
103 if (!isCommentsEnabled(actionRequest)) {
104 sendError(
105 actionResponse,
106 "Comments have been disabled for this blog entry.");
107
108 return;
109 }
110
111 if (Validator.isNull(url)) {
112 sendError(
113 actionResponse, "Trackback requires a valid permanent URL.");
114
115 return;
116 }
117
118 HttpServletRequest request = PortalUtil.getHttpServletRequest(
119 actionRequest);
120
121 String remoteIp = request.getRemoteAddr();
122
123 String trackbackIp = HttpUtil.getIpAddress(url);
124
125 if (!remoteIp.equals(trackbackIp)) {
126 sendError(
127 actionResponse,
128 "Remote IP " + remoteIp + " does not match trackback URL's IP "
129 + trackbackIp);
130
131 return;
132 }
133
134 try {
135 ActionUtil.getEntry(actionRequest);
136 }
137 catch (PrincipalException pe) {
138 sendError(
139 actionResponse,
140 "Blog entry must have guest VIEW permissions for trackbacks.");
141
142 return;
143 }
144
145 BlogsEntry entry = (BlogsEntry)actionRequest.getAttribute(
146 WebKeys.BLOGS_ENTRY);
147
148 if (!entry.isAllowTrackbacks()) {
149 sendError(
150 actionResponse,
151 "Trackbacks are not enabled on this blog entry.");
152
153 return;
154 }
155
156 long userId = UserLocalServiceUtil.getDefaultUserId(
157 themeDisplay.getCompanyId());
158 String className = BlogsEntry.class.getName();
159 long classPK = entry.getEntryId();
160
161 ServiceContext serviceContext = ServiceContextFactory.getInstance(
162 MBMessage.class.getName(), actionRequest);
163
164 MBMessageDisplay messageDisplay =
165 MBMessageLocalServiceUtil.getDiscussionMessageDisplay(
166 userId, className, classPK);
167
168 MBThread thread = messageDisplay.getThread();
169
170 long threadId = thread.getThreadId();
171 long parentMessageId = thread.getRootMessageId();
172 String body =
173 "[...] " + excerpt + " [...] [url=" + url + "]" +
174 themeDisplay.translate("read-more") + "[/url]";
175
176 MBMessage message = MBMessageLocalServiceUtil.addDiscussionMessage(
177 userId, blogName, className, classPK, threadId, parentMessageId,
178 title, body, serviceContext);
179
180 String entryURL =
181 PortalUtil.getLayoutFullURL(themeDisplay) +
182 Portal.FRIENDLY_URL_SEPARATOR + "blogs/" +
183 entry.getUrlTitle();
184
185 TrackbackVerifierUtil.addNewPost(
186 message.getMessageId(), url, entryURL);
187
188 sendSuccess(actionResponse);
189 }
190
191 protected boolean isCheckMethodOnProcessAction() {
192 return _CHECK_METHOD_ON_PROCESS_ACTION;
193 }
194
195 protected boolean isCommentsEnabled(ActionRequest actionRequest)
196 throws Exception {
197
198 PortletPreferences preferences = actionRequest.getPreferences();
199
200 String portletResource = ParamUtil.getString(
201 actionRequest, "portletResource");
202
203 if (Validator.isNotNull(portletResource)) {
204 preferences = PortletPreferencesFactoryUtil.getPortletSetup(
205 actionRequest, portletResource);
206 }
207
208 return GetterUtil.getBoolean(
209 preferences.getValue("enable-comments", null), true);
210 }
211
212 protected void sendError(ActionResponse actionResponse, String msg)
213 throws Exception {
214
215 sendResponse(actionResponse, msg, false);
216 }
217
218 protected void sendResponse(
219 ActionResponse actionResponse, String msg, boolean success)
220 throws Exception {
221
222 StringBuilder sb = new StringBuilder();
223
224 sb.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
225 sb.append("<response>");
226
227 if (success) {
228 sb.append("<error>0</error>");
229 }
230 else {
231 sb.append("<error>1</error>");
232 sb.append("<message>" + msg + "</message>");
233 }
234
235 sb.append("</response>");
236
237 HttpServletResponse response = PortalUtil.getHttpServletResponse(
238 actionResponse);
239
240 ServletResponseUtil.sendFile(
241 response, null, sb.toString().getBytes(StringPool.UTF8),
242 ContentTypes.TEXT_XML_UTF8);
243 }
244
245 protected void sendSuccess(ActionResponse actionResponse) throws Exception {
246 sendResponse(actionResponse, null, true);
247 }
248
249 private static final boolean _CHECK_METHOD_ON_PROCESS_ACTION = false;
250
251 private static Log _log = LogFactoryUtil.getLog(TrackbackAction.class);
252
253 }