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1
31 package org.blojsom.servlet;
32
33 import org.apache.commons.logging.Log;
34 import org.apache.commons.logging.LogFactory;
35 import org.blojsom.blog.Blog;
36 import org.blojsom.blog.Category;
37 import org.blojsom.blog.Comment;
38 import org.blojsom.blog.Entry;
39 import org.blojsom.dispatcher.Dispatcher;
40 import org.blojsom.fetcher.Fetcher;
41 import org.blojsom.fetcher.FetcherException;
42 import org.blojsom.plugin.Plugin;
43 import org.blojsom.plugin.PluginException;
44 import org.blojsom.util.BlojsomConstants;
45 import org.blojsom.util.BlojsomUtils;
46 import org.springframework.beans.BeansException;
47 import org.springframework.context.support.ClassPathXmlApplicationContext;
48
49 import javax.servlet.ServletConfig  ;
50 import javax.servlet.ServletException ;
51 import javax.servlet.http.HttpServlet ;
52 import javax.servlet.http.HttpServletRequest ;
53 import javax.servlet.http.HttpServletResponse ;
54 import java.io.IOException ;
55 import java.io.UnsupportedEncodingException ;
56 import java.util.Date ;
57 import java.util.HashMap ;
58 import java.util.Map ;
59 import java.util.Properties ;
60
61
68 public class BlojsomServlet extends HttpServlet {
69
70 protected Log _logger = LogFactory.getLog(BlojsomServlet.class);
71
72 protected String [] BLOJSOM_CONFIGURATION_FILES = {"blojsom.xml"};
73 protected ClassPathXmlApplicationContext _classPathXmlApplicationContext;
74
75
81 public void init(ServletConfig servletConfig) throws ServletException {
82 super.init(servletConfig);
83
84 ServletConfigFactoryBean.setServletConfig(servletConfig);
85
86 try {
87 _classPathXmlApplicationContext = new ClassPathXmlApplicationContext(BLOJSOM_CONFIGURATION_FILES);
88 } catch (BeansException e) {
89 if (_logger.isErrorEnabled()) {
90 _logger.error(e);
91 }
92
93 throw new ServletException (e);
94 }
95
96 servletConfig.getServletContext().setAttribute(BlojsomConstants.BLOJSOM_APPLICATION_CONTEXT, _classPathXmlApplicationContext);
97
98 if (_logger.isDebugEnabled()) {
99 _logger.debug("blojsom: All Your Blog Are Belong To Us");
100 }
101 }
102
103
111 protected void service(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws ServletException , IOException {
112 try {
113 httpServletRequest.setCharacterEncoding(BlojsomConstants.UTF8);
114 } catch (UnsupportedEncodingException e) {
115 if (_logger.isErrorEnabled()) {
116 _logger.error(e);
117 }
118 }
119
120 if (!httpServletRequest.getRequestURI().endsWith("/")) {
123 StringBuffer redirectURL = new StringBuffer ();
124 redirectURL.append(httpServletRequest.getRequestURI());
125 redirectURL.append("/");
126 if (httpServletRequest.getParameterMap().size() > 0) {
127 redirectURL.append("?");
128 redirectURL.append(BlojsomUtils.convertRequestParams(httpServletRequest));
129 }
130
131 if (_logger.isDebugEnabled()) {
132 _logger.debug("Redirecting the user to: " + redirectURL.toString());
133 }
134
135 httpServletResponse.sendRedirect(redirectURL.toString());
136
137 return;
138 }
139
140 Properties blojsomDefaultProperties = (Properties ) _classPathXmlApplicationContext.getBean("defaultProperties");
141
142 String blogId = httpServletRequest.getParameter(BlojsomConstants.BLOG_ID_PARAM);
144 if (BlojsomUtils.checkNullOrBlank(blogId)) {
145 String blogIdFromPath = BlojsomUtils.getBlogFromPath(httpServletRequest.getPathInfo());
146 if (blogIdFromPath == null) {
147 blogId = blojsomDefaultProperties.getProperty(BlojsomConstants.DEFAULT_BLOG_IP);
148 } else {
149 blogId = blogIdFromPath;
150 }
151 }
152
153 if (BlojsomUtils.checkNullOrBlank(blogId)) {
154 httpServletResponse.sendError(HttpServletResponse.SC_NOT_FOUND, "Blog ID not specified");
155
156 return;
157 }
158
159 Fetcher fetcher = (Fetcher) _classPathXmlApplicationContext.getBean("fetcher");
160
161 Blog blog;
162 try {
163 blog = fetcher.loadBlog(blogId);
164 } catch (FetcherException e) {
165 if (_logger.isErrorEnabled()) {
166 _logger.error(e);
167 }
168
169 String defaultBlogId = blojsomDefaultProperties.getProperty(BlojsomConstants.DEFAULT_BLOG_IP);
171 if (BlojsomUtils.checkNullOrBlank(defaultBlogId)) {
172 httpServletResponse.sendError(HttpServletResponse.SC_NOT_FOUND, "Unable to load blog ID: " + blogId);
173
174 return;
175 } else {
176 try {
177 blog = fetcher.loadBlog(defaultBlogId);
178 } catch (FetcherException e1) {
179 if (_logger.isErrorEnabled()) {
180 _logger.error(e);
181 }
182
183 httpServletResponse.sendError(HttpServletResponse.SC_NOT_FOUND, "Unable to load blog ID: " + defaultBlogId);
184
185 return;
186 }
187 }
188 }
189
190 if ("true".equals(blog.getProperty(BlojsomConstants.USE_DYNAMIC_BLOG_URLS))) {
191 BlojsomUtils.resolveDynamicBaseAndBlogURL(httpServletRequest, blog, blogId);
192 }
193
194 String flavor = httpServletRequest.getParameter(BlojsomConstants.FLAVOR_PARAM);
196 if (BlojsomUtils.checkNullOrBlank(flavor)) {
197 flavor = blog.getProperty(BlojsomConstants.BLOG_DEFAULT_FLAVOR_IP);
198 if (blog.getTemplates().get(flavor) == null) {
199 flavor = BlojsomConstants.DEFAULT_FLAVOR_HTML;
200 }
201 } else {
202 if (blog.getTemplates().get(flavor) == null) {
203 flavor = blog.getProperty(BlojsomConstants.BLOG_DEFAULT_FLAVOR_IP);
204 if (blog.getTemplates().get(flavor) == null) {
205 flavor = BlojsomConstants.DEFAULT_FLAVOR_HTML;
206 }
207 }
208 }
209
210 HashMap context = new HashMap ();
212
213 context.put(BlojsomConstants.RESOURCE_MANAGER_CONTEXT_KEY, _classPathXmlApplicationContext.getBean("resourceManager"));
215 context.put(BlojsomConstants.BLOJSOM_REQUESTED_FLAVOR, flavor);
216
217 Entry[] entries = null;
218 Category[] categories = null;
219
220 try {
221 categories = fetcher.fetchCategories(httpServletRequest, httpServletResponse, blog, flavor, context);
222 entries = fetcher.fetchEntries(httpServletRequest, httpServletResponse, blog, flavor, context);
223 } catch (FetcherException e) {
224 if (_logger.isErrorEnabled()) {
225 _logger.error(e);
226 }
227 }
228
229 String [] pluginChain;
230 Map plugins = blog.getPlugins();
231
232 if (httpServletRequest.getParameter(BlojsomConstants.PLUGINS_PARAM) != null) {
234 pluginChain = BlojsomUtils.parseCommaList(httpServletRequest.getParameter(BlojsomConstants.PLUGINS_PARAM));
235 } else {
236 if (plugins.containsKey(flavor) && !BlojsomUtils.checkNullOrBlank(((String ) plugins.get(flavor)).trim())) {
237 pluginChain = BlojsomUtils.parseOnlyCommaList((String ) plugins.get(flavor), true);
238 } else {
239 pluginChain = BlojsomUtils.parseOnlyCommaList((String ) plugins.get("default"), true);
240 }
241 }
242
243 if ((entries != null) && (pluginChain != null) && (pluginChain.length > 0)) {
245 for (int i = 0; i < pluginChain.length; i++) {
246 String plugin = pluginChain[i];
247 try {
248 Plugin pluginToExecute = (Plugin) _classPathXmlApplicationContext.getBean(plugin);
249 if (_logger.isDebugEnabled()) {
250 _logger.debug("blojsom plugin execution: " + pluginToExecute.getClass().getName());
251 }
252 try {
253 entries = pluginToExecute.process(httpServletRequest, httpServletResponse, blog, context, entries);
254 pluginToExecute.cleanup();
255 } catch (PluginException e) {
256 if (_logger.isErrorEnabled()) {
257 _logger.error(e);
258 }
259 }
260 } catch (BeansException e) {
261 if (_logger.isErrorEnabled()) {
262 _logger.error("Plugin not available: " + plugin);
263 }
264 }
265 }
266 } else {
267 if (_logger.isDebugEnabled()) {
268 _logger.debug("No entries available for plugins to process or no plugins specified for flavor");
269 }
270 }
271
272 String blogdate = null;
273 String blogISO8601Date = null;
274 String blogUTCDate = null;
275 Date blogDateObject = null;
276
277 boolean sendLastModified = true;
278 if (httpServletRequest.getParameter(BlojsomConstants.OVERRIDE_LASTMODIFIED_PARAM) != null) {
279 sendLastModified = Boolean.getBoolean(httpServletRequest.getParameter(BlojsomConstants.OVERRIDE_LASTMODIFIED_PARAM));
280 }
281
282 if (sendLastModified) {
285 if ((entries != null) && (entries.length > 0)) {
286 Entry _entry = entries[0];
287 long _lastmodified;
288
289 if (_entry.getNumComments() > 0) {
290 Comment _comment = _entry.getCommentsAsArray()[_entry.getNumComments() - 1];
291 _lastmodified = _comment.getCommentDate().getTime();
292 if (_logger.isDebugEnabled()) {
293 _logger.debug("Adding last-modified header for most recent entry comment");
294 }
295 } else {
296 _lastmodified = _entry.getDate().getTime();
297 if (_logger.isDebugEnabled()) {
298 _logger.debug("Adding last-modified header for most recent blog entry");
299 }
300 }
301
302 if (context.containsKey(BlojsomConstants.BLOJSOM_LAST_MODIFIED)) {
304 Long lastModified = (Long ) context.get(BlojsomConstants.BLOJSOM_LAST_MODIFIED);
305 if (lastModified.longValue() > _lastmodified) {
306 _lastmodified = lastModified.longValue();
307 }
308 }
309
310 String etagLastModified = BlojsomUtils.getISO8601Date(new Date (_lastmodified));
312 httpServletResponse.addHeader(BlojsomConstants.HTTP_ETAG, "\"" + BlojsomUtils.digestString(etagLastModified) + "\"");
313
314 httpServletResponse.addDateHeader(BlojsomConstants.HTTP_LASTMODIFIED, _lastmodified);
315 blogdate = entries[0].getRFC822Date();
316 blogISO8601Date = entries[0].getISO8601Date();
317 blogDateObject = entries[0].getDate();
318 blogUTCDate = BlojsomUtils.getUTCDate(entries[0].getDate());
319 } else {
320 if (_logger.isDebugEnabled()) {
321 _logger.debug("Adding last-modified header for current date");
322 }
323
324 Date today = new Date ();
325 blogdate = BlojsomUtils.getRFC822Date(today);
326 blogISO8601Date = BlojsomUtils.getISO8601Date(today);
327 blogUTCDate = BlojsomUtils.getUTCDate(today);
328 blogDateObject = today;
329 httpServletResponse.addDateHeader(BlojsomConstants.HTTP_LASTMODIFIED, today.getTime());
330 httpServletResponse.addHeader(BlojsomConstants.HTTP_ETAG, "\"" + BlojsomUtils.digestString(blogISO8601Date) + "\"");
332 }
333 }
334
335 context.put(BlojsomConstants.BLOJSOM_DATE, blogdate);
336 context.put(BlojsomConstants.BLOJSOM_DATE_ISO8601, blogISO8601Date);
337 context.put(BlojsomConstants.BLOJSOM_DATE_OBJECT, blogDateObject);
338 context.put(BlojsomConstants.BLOJSOM_DATE_UTC, blogUTCDate);
339
340 context.put(BlojsomConstants.BLOJSOM_BLOG, blog);
342 context.put(BlojsomConstants.BLOJSOM_ENTRIES, entries);
343 context.put(BlojsomConstants.BLOJSOM_CATEGORIES, categories);
344 context.put(BlojsomConstants.BLOJSOM_VERSION, BlojsomConstants.BLOJSOM_VERSION_NUMBER);
345 context.put(BlojsomConstants.BLOJSOM_BLOG_ID, blog.getBlogId());
346 context.put(BlojsomConstants.BLOJSOM_SITE_URL, blog.getBlogBaseURL());
347
348 context.put(BlojsomConstants.BLOJSOM_BLOG_ID, blog.getBlogId());
349
350 String templateAndType = (String ) blog.getTemplates().get(flavor);
351 String [] templateData = BlojsomUtils.parseOnlyCommaList(templateAndType, true);
352 String templateExtension = BlojsomUtils.getFileExtension(templateData[0]);
353
354 Dispatcher dispatcher = null;
355 try {
356 dispatcher = (org.blojsom.dispatcher.Dispatcher) _classPathXmlApplicationContext.getBean(templateExtension);
357 } catch (BeansException e) {
358 if (_logger.isErrorEnabled()) {
359 _logger.error(e);
360 }
361
362 httpServletResponse.sendError(HttpServletResponse.SC_BAD_REQUEST, "Unable to retrieve dispatcher for template extension: " + templateExtension);
363 }
364 dispatcher.dispatch(httpServletRequest, httpServletResponse, blog, context, templateData[0], templateData[1]);
365 }
366
367
370 public void destroy() {
371 super.destroy();
372
373 _classPathXmlApplicationContext.destroy();
374
375 if (_logger.isDebugEnabled()) {
376 _logger.debug("blojsom destroyed");
377 }
378 }
379 }
380 |
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