/*
* Copyright 2004 Sun Microsystems, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package com.sun.syndication.samples.servlet;
import com.sun.syndication.feed.synd.*;
import com.sun.syndication.io.FeedException;
import com.sun.syndication.io.SyndFeedOutput;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
/**
* Sample Servlet that serves a feed created with Rome.
* <p>
* The feed type is determined by the 'type' request parameter, if the parameter is missing it defaults
* to the 'default.feed.type' servlet init parameter, if the init parameter is missing it defaults to 'atom_0.3'
* <p>
* @author Alejandro Abdelnur
*
*/
public class FeedServlet extends HttpServlet {
private static final String DEFAULT_FEED_TYPE = "default.feed.type";
private static final String FEED_TYPE = "type";
private static final String MIME_TYPE = "application/xml; charset=UTF-8";
private static final String COULD_NOT_GENERATE_FEED_ERROR = "Could not generate feed";
private static final String DATE_FORMAT = "yyyy-MM-dd";
private String _defaultFeedType;
public void init() {
_defaultFeedType = getServletConfig().getInitParameter(DEFAULT_FEED_TYPE);
_defaultFeedType = (_defaultFeedType!=null) ? _defaultFeedType : "atom_0.3";
}
public void doGet(HttpServletRequest req,HttpServletResponse res) throws IOException {
try {
SyndFeed feed = getFeed(req);
String feedType = req.getParameter(FEED_TYPE);
feedType = (feedType!=null) ? feedType : _defaultFeedType;
feed.setFeedType(feedType);
res.setContentType(MIME_TYPE);
SyndFeedOutput output = new SyndFeedOutput();
output.output(feed,res.getWriter());
}
catch (FeedException ex) {
String msg = COULD_NOT_GENERATE_FEED_ERROR;
log(msg,ex);
res.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR,msg);
}
}
protected SyndFeed getFeed(HttpServletRequest req) throws IOException,FeedException {
DateFormat dateParser = new SimpleDateFormat(DATE_FORMAT);
SyndFeed feed = new SyndFeedImpl();
feed.setTitle("Sample Feed (created with Rome)");
feed.setLink("http://rome.dev.java.net");
feed.setDescription("This feed has been created using Rome (Java syndication utilities");
List entries = new ArrayList();
SyndEntry entry;
SyndContent description;
entry = new SyndEntryImpl();
entry.setTitle("Rome v0.1");
entry.setLink("http://wiki.java.net/bin/view/Javawsxml/Rome01");
try {
entry.setPublishedDate(dateParser.parse("2004-06-08"));
}
catch (ParseException ex) {
// IT CANNOT HAPPEN WITH THIS SAMPLE
}
description = new SyndContentImpl();
description.setType("text/plain");
description.setValue("Initial release of Rome");
entry.setDescription(description);
entries.add(entry);
entry = new SyndEntryImpl();
entry.setTitle("Rome v0.2");
entry.setLink("http://wiki.java.net/bin/view/Javawsxml/Rome02");
try {
entry.setPublishedDate(dateParser.parse("2004-06-16"));
}
catch (ParseException ex) {
// IT CANNOT HAPPEN WITH THIS SAMPLE
}
description = new SyndContentImpl();
description.setType("text/plain");
description.setValue("Bug fixes, minor API changes and some new features"+
"<p>For details check the <a href=\"http://wiki.java.net/bin/view/Javawsxml/RomeChangesLog#RomeV02\">Changes Log for 0.2</a></p>");
entry.setDescription(description);
entries.add(entry);
entry = new SyndEntryImpl();
entry.setTitle("Rome v0.3");
entry.setLink("http://wiki.java.net/bin/view/Javawsxml/Rome03");
try {
entry.setPublishedDate(dateParser.parse("2004-07-27"));
}
catch (ParseException ex) {
// IT CANNOT HAPPEN WITH THIS SAMPLE
}
description = new SyndContentImpl();
description.setType("text/html");
description.setValue("<p>Bug fixes, API changes, some new features and some Unit testing</p>"+
"<p>For details check the <a href=\"http://wiki.java.net/bin/view/Javawsxml/RomeChangesLog#RomeV03\">Changes Log for 0.3</a></p>");
entry.setDescription(description);
entries.add(entry);
entry = new SyndEntryImpl();
entry.setTitle("Rome v0.4");
entry.setLink("http://wiki.java.net/bin/view/Javawsxml/Rome04");
try {
entry.setPublishedDate(dateParser.parse("2004-09-24"));
}
catch (ParseException ex) {
// IT CANNOT HAPPEN WITH THIS SAMPLE
}
description = new SyndContentImpl();
description.setType("text/html");
description.setValue("<p>Bug fixes, API changes, some new features, Unit testing completed</p>"+
"<p>For details check the <a href=\"http://wiki.java.net/bin/view/Javawsxml/RomeChangesLog#RomeV04\">Changes Log for 0.4</a></p>");
entry.setDescription(description);
entries.add(entry);
feed.setEntries(entries);
return feed;
}
}