Source Code Cross Referenced for WeblogPageRequest.java in  » Blogger-System » apache-roller-3.1 » org » apache » roller » ui » rendering » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Blogger System » apache roller 3.1 » org.apache.roller.ui.rendering.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         *  contributor license agreements.  The ASF licenses this file to You
004:         * under the Apache License, Version 2.0 (the "License"); you may not
005:         * use this file except in compliance with the License.
006:         * You may obtain a copy of the License at
007:         *
008:         *     http://www.apache.org/licenses/LICENSE-2.0
009:         *
010:         * Unless required by applicable law or agreed to in writing, software
011:         * distributed under the License is distributed on an "AS IS" BASIS,
012:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013:         * See the License for the specific language governing permissions and
014:         * limitations under the License.  For additional information regarding
015:         * copyright in this work, please see the NOTICE file in the top level
016:         * directory of this distribution.
017:         */
018:
019:        package org.apache.roller.ui.rendering.util;
020:
021:        import java.util.ArrayList;
022:        import java.util.Arrays;
023:        import java.util.HashMap;
024:        import java.util.List;
025:        import java.util.Map;
026:        import javax.servlet.http.HttpServletRequest;
027:        import org.apache.commons.lang.StringUtils;
028:        import org.apache.commons.logging.Log;
029:        import org.apache.commons.logging.LogFactory;
030:        import org.apache.roller.RollerException;
031:        import org.apache.roller.config.RollerConfig;
032:        import org.apache.roller.business.PropertiesManager;
033:        import org.apache.roller.business.Roller;
034:        import org.apache.roller.business.RollerFactory;
035:        import org.apache.roller.business.UserManager;
036:        import org.apache.roller.business.WeblogManager;
037:        import org.apache.roller.pojos.Template;
038:        import org.apache.roller.pojos.WeblogCategoryData;
039:        import org.apache.roller.pojos.WeblogEntryData;
040:        import org.apache.roller.pojos.WeblogTemplate;
041:        import org.apache.roller.util.URLUtilities;
042:        import org.apache.roller.util.Utilities;
043:
044:        /**
045:         * Represents a request for a Roller weblog page.
046:         *
047:         * any url from ... /roller-ui/rendering/page/*
048:         *
049:         * We use this class as a helper to parse an incoming url and sort out the
050:         * information embedded in the url for later use.
051:         */
052:        public class WeblogPageRequest extends WeblogRequest {
053:
054:            private static Log log = LogFactory.getLog(WeblogPageRequest.class);
055:
056:            private static final String PAGE_SERVLET = "/roller-ui/rendering/page";
057:
058:            // lightweight attributes
059:            private String context = null;
060:            private String weblogAnchor = null;
061:            private String weblogPageName = null;
062:            private String weblogCategoryName = null;
063:            private String weblogDate = null;
064:            private List tags = null;
065:            private int pageNum = 0;
066:            private Map customParams = new HashMap();
067:
068:            // heavyweight attributes
069:            private WeblogEntryData weblogEntry = null;
070:            private Template weblogPage = null;
071:            private WeblogCategoryData weblogCategory = null;
072:
073:            public WeblogPageRequest() {
074:            }
075:
076:            /**
077:             * Construct the WeblogPageRequest by parsing the incoming url
078:             */
079:            public WeblogPageRequest(HttpServletRequest request)
080:                    throws InvalidRequestException {
081:
082:                // let our parent take care of their business first
083:                // parent determines weblog handle and locale if specified
084:                super (request);
085:
086:                String servlet = request.getServletPath();
087:
088:                // we only want the path info left over from after our parents parsing
089:                String pathInfo = this .getPathInfo();
090:
091:                // parse the request object and figure out what we've got
092:                log.debug("parsing path " + pathInfo);
093:
094:                // was this request bound for the right servlet?
095:                if (!isValidDestination(servlet)) {
096:                    throw new InvalidRequestException(
097:                            "invalid destination for request, "
098:                                    + request.getRequestURL());
099:                }
100:
101:                /*
102:                 * parse path info
103:                 *
104:                 * we expect one of the following forms of url ...
105:                 *
106:                 * /entry/<anchor> - permalink
107:                 * /date/<YYYYMMDD> - date collection view
108:                 * /category/<category> - category collection view
109:                 * /tags/spring+framework - tags
110:                 * /page/<pagelink> - custom page
111:                 *
112:                 * path info may be null, which indicates the weblog homepage
113:                 */
114:                if (pathInfo != null && pathInfo.trim().length() > 0) {
115:
116:                    // all views use 2 path elements, except category
117:                    String[] pathElements = pathInfo.split("/");
118:                    if (pathElements.length > 1
119:                            && "category".equals(pathElements[0])) {
120:
121:                        // category may have multiple path elements, so re-split with max 2
122:                        pathElements = pathInfo.split("/", 2);
123:                        this .context = pathElements[0];
124:                        this .weblogCategoryName = "/"
125:                                + URLUtilities.decode(pathElements[1]);
126:
127:                        // all categories must start with a /
128:                        if (!this .weblogCategoryName.startsWith("/")) {
129:                            this .weblogCategoryName = "/"
130:                                    + this .weblogCategoryName;
131:                        }
132:
133:                    } else if (pathElements.length == 2) {
134:
135:                        this .context = pathElements[0];
136:                        if ("entry".equals(this .context)) {
137:                            this .weblogAnchor = URLUtilities
138:                                    .decode(pathElements[1]);
139:
140:                        } else if ("date".equals(this .context)) {
141:                            if (this .isValidDateString(pathElements[1])) {
142:                                this .weblogDate = pathElements[1];
143:                            } else {
144:                                throw new InvalidRequestException(
145:                                        "invalid date, "
146:                                                + request.getRequestURL());
147:                            }
148:
149:                        } else if ("page".equals(this .context)) {
150:                            this .weblogPageName = pathElements[1];
151:
152:                        } else if ("tags".equals(this .context)) {
153:                            String tagsString = pathElements[1].replace('+',
154:                                    ' ');
155:                            this .tags = Utilities
156:                                    .splitStringAsTags(URLUtilities
157:                                            .decode(tagsString));
158:                            int maxSize = RollerConfig.getIntProperty(
159:                                    "tags.queries.maxIntersectionSize", 3);
160:                            if (this .tags.size() > maxSize)
161:                                throw new InvalidRequestException(
162:                                        "max number of tags allowed is "
163:                                                + maxSize + ", "
164:                                                + request.getRequestURL());
165:
166:                        } else {
167:                            throw new InvalidRequestException("context "
168:                                    + this .context + "not supported, "
169:                                    + request.getRequestURL());
170:                        }
171:
172:                    } else {
173:                        throw new InvalidRequestException("bad path info, "
174:                                + request.getRequestURL());
175:                    }
176:
177:                } else {
178:                    // default view, weblog homepage
179:                }
180:
181:                /*
182:                 * parse request parameters
183:                 *
184:                 * the only params we currently allow are:
185:                 *   date - specifies a weblog date string
186:                 *   cat - specifies a weblog category
187:                 *   anchor - specifies a weblog entry (old way)
188:                 *   entry - specifies a weblog entry
189:                 *
190:                 * we only allow request params if the path info is null or on user
191:                 * defined pages (for backwards compatability).  this way
192:                 * we prevent mixing of path based and query param style urls.
193:                 */
194:                if (pathInfo == null || this .weblogPageName != null) {
195:
196:                    // check for entry/anchor params which indicate permalink
197:                    if (request.getParameter("entry") != null) {
198:                        String anchor = request.getParameter("entry");
199:                        if (StringUtils.isNotEmpty(anchor)) {
200:                            this .weblogAnchor = anchor;
201:                        }
202:                    } else if (request.getParameter("anchor") != null) {
203:                        String anchor = request.getParameter("anchor");
204:                        if (StringUtils.isNotEmpty(anchor)) {
205:                            this .weblogAnchor = anchor;
206:                        }
207:                    }
208:
209:                    // only check for other params if we didn't find an anchor above or tags
210:                    if (this .weblogAnchor == null && this .tags == null) {
211:                        if (request.getParameter("date") != null) {
212:                            String date = request.getParameter("date");
213:                            if (this .isValidDateString(date)) {
214:                                this .weblogDate = date;
215:                            } else {
216:                                throw new InvalidRequestException(
217:                                        "invalid date, "
218:                                                + request.getRequestURL());
219:                            }
220:                        }
221:
222:                        if (request.getParameter("cat") != null) {
223:                            this .weblogCategoryName = URLUtilities
224:                                    .decode(request.getParameter("cat"));
225:
226:                            // all categories must start with a /
227:                            if (!this .weblogCategoryName.startsWith("/")) {
228:                                this .weblogCategoryName = "/"
229:                                        + this .weblogCategoryName;
230:                            }
231:                        }
232:                    }
233:                }
234:
235:                // page request param is supported in all views
236:                if (request.getParameter("page") != null) {
237:                    String pageInt = request.getParameter("page");
238:                    try {
239:                        this .pageNum = Integer.parseInt(pageInt);
240:                    } catch (NumberFormatException e) {
241:                        // ignored, bad input
242:                    }
243:                }
244:
245:                // build customParams Map, we remove built-in params because we only
246:                // want this map to represent params defined by the template author
247:                customParams = new HashMap(request.getParameterMap());
248:                customParams.remove("entry");
249:                customParams.remove("anchor");
250:                customParams.remove("date");
251:                customParams.remove("cat");
252:                customParams.remove("page");
253:                customParams.remove("tags");
254:
255:                if (log.isDebugEnabled()) {
256:                    log.debug("context = " + this .context);
257:                    log.debug("weblogAnchor = " + this .weblogAnchor);
258:                    log.debug("weblogDate = " + this .weblogDate);
259:                    log.debug("weblogCategory = " + this .weblogCategoryName);
260:                    log.debug("tags = " + this .tags);
261:                    log.debug("weblogPage = " + this .weblogPageName);
262:                    log.debug("pageNum = " + this .pageNum);
263:                }
264:            }
265:
266:            boolean isValidDestination(String servlet) {
267:                return (servlet != null && PAGE_SERVLET.equals(servlet));
268:            }
269:
270:            private boolean isValidDateString(String dateString) {
271:                // string must be all numeric and 6 or 8 characters
272:                return (dateString != null && StringUtils.isNumeric(dateString) && (dateString
273:                        .length() == 6 || dateString.length() == 8));
274:            }
275:
276:            public String getContext() {
277:                return context;
278:            }
279:
280:            public void setContext(String context) {
281:                this .context = context;
282:            }
283:
284:            public String getWeblogAnchor() {
285:                return weblogAnchor;
286:            }
287:
288:            public void setWeblogAnchor(String weblogAnchor) {
289:                this .weblogAnchor = weblogAnchor;
290:            }
291:
292:            public String getWeblogPageName() {
293:                return weblogPageName;
294:            }
295:
296:            public void setWeblogPageName(String weblogPage) {
297:                this .weblogPageName = weblogPage;
298:            }
299:
300:            public String getWeblogCategoryName() {
301:                return weblogCategoryName;
302:            }
303:
304:            public void setWeblogCategoryName(String weblogCategory) {
305:                this .weblogCategoryName = weblogCategory;
306:            }
307:
308:            public String getWeblogDate() {
309:                return weblogDate;
310:            }
311:
312:            public void setWeblogDate(String weblogDate) {
313:                this .weblogDate = weblogDate;
314:            }
315:
316:            public int getPageNum() {
317:                return pageNum;
318:            }
319:
320:            public void setPageNum(int pageNum) {
321:                this .pageNum = pageNum;
322:            }
323:
324:            public Map getCustomParams() {
325:                return customParams;
326:            }
327:
328:            public void setCustomParams(Map customParams) {
329:                this .customParams = customParams;
330:            }
331:
332:            public List getTags() {
333:                return tags;
334:            }
335:
336:            public void setTags(List tags) {
337:                this .tags = tags;
338:            }
339:
340:            public WeblogEntryData getWeblogEntry() {
341:
342:                if (weblogEntry == null && weblogAnchor != null) {
343:                    try {
344:                        WeblogManager wmgr = RollerFactory.getRoller()
345:                                .getWeblogManager();
346:                        weblogEntry = wmgr.getWeblogEntryByAnchor(getWeblog(),
347:                                weblogAnchor);
348:                    } catch (RollerException ex) {
349:                        log.error("Error getting weblog entry " + weblogAnchor,
350:                                ex);
351:                    }
352:                }
353:
354:                return weblogEntry;
355:            }
356:
357:            public void setWeblogEntry(WeblogEntryData weblogEntry) {
358:                this .weblogEntry = weblogEntry;
359:            }
360:
361:            public Template getWeblogPage() {
362:
363:                if (weblogPage == null && weblogPageName != null) {
364:                    try {
365:                        UserManager umgr = RollerFactory.getRoller()
366:                                .getUserManager();
367:                        weblogPage = getWeblog().getPageByLink(weblogPageName);
368:                    } catch (RollerException ex) {
369:                        log.error(
370:                                "Error getting weblog page " + weblogPageName,
371:                                ex);
372:                    }
373:                }
374:
375:                return weblogPage;
376:            }
377:
378:            public void setWeblogPage(WeblogTemplate weblogPage) {
379:                this .weblogPage = weblogPage;
380:            }
381:
382:            public WeblogCategoryData getWeblogCategory() {
383:
384:                if (weblogCategory == null && weblogCategoryName != null) {
385:                    try {
386:                        WeblogManager wmgr = RollerFactory.getRoller()
387:                                .getWeblogManager();
388:                        weblogCategory = wmgr.getWeblogCategoryByPath(
389:                                getWeblog(), weblogCategoryName);
390:                    } catch (RollerException ex) {
391:                        log.error("Error getting weblog category "
392:                                + weblogCategoryName, ex);
393:                    }
394:                }
395:
396:                return weblogCategory;
397:            }
398:
399:            public void setWeblogCategory(WeblogCategoryData weblogCategory) {
400:                this.weblogCategory = weblogCategory;
401:            }
402:
403:        }
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