/*
JSPWiki - a JSP-based WikiWiki clone.
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you 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.ecyrd.jspwiki.rss;
import java.io.IOException;
import java.io.StringWriter;
import java.text.SimpleDateFormat;
import java.util.*;
import javax.servlet.ServletContext;
import org.jdom.Element;
import org.jdom.output.Format;
import org.jdom.output.XMLOutputter;
import com.ecyrd.jspwiki.Release;
import com.ecyrd.jspwiki.WikiContext;
import com.ecyrd.jspwiki.WikiEngine;
import com.ecyrd.jspwiki.WikiPage;
import com.ecyrd.jspwiki.attachment.Attachment;
import com.ecyrd.jspwiki.providers.ProviderException;
/**
* Represents an RSS 2.0 feed (with enclosures). This feed provides no
* fizz-bang features.
*
* @since 2.2.27
*/
public class RSS20Feed extends Feed
{
/**
* Creates an RSS 2.0 feed for the specified Context.
*
* @param context The WikiContext.
*/
public RSS20Feed( WikiContext context )
{
super( context );
}
private List getItems()
{
ArrayList<Element> list = new ArrayList<Element>();
SimpleDateFormat fmt = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss 'GMT'");
WikiEngine engine = m_wikiContext.getEngine();
ServletContext servletContext = null;
if( m_wikiContext.getHttpRequest() != null )
servletContext = m_wikiContext.getHttpRequest().getSession().getServletContext();
for( Iterator i = m_entries.iterator(); i.hasNext(); )
{
Entry e = (Entry)i.next();
WikiPage p = e.getPage();
String url = e.getURL();
Element item = new Element("item");
item.addContent( new Element("link").setText(url) );
item.addContent( new Element("title").setText( e.getTitle()) );
item.addContent( new Element("description").setText( e.getContent()) );
//
// Attachments for enclosures
//
if( engine.getAttachmentManager().hasAttachments(p) && servletContext != null )
{
try
{
Collection c = engine.getAttachmentManager().listAttachments(p);
for( Iterator a = c.iterator(); a.hasNext(); )
{
Attachment att = (Attachment) a.next();
Element attEl = new Element("enclosure");
attEl.setAttribute( "url", engine.getURL(WikiContext.ATTACH, att.getName(), null, true ) );
attEl.setAttribute( "length", Long.toString(att.getSize()) );
attEl.setAttribute( "type", getMimeType( servletContext, att.getFileName() ) );
item.addContent( attEl );
}
}
catch( ProviderException ex )
{
// FIXME: log.info("Can't get attachment data",ex);
}
}
//
// Modification date.
//
Calendar cal = Calendar.getInstance();
cal.setTime( p.getLastModified() );
cal.add( Calendar.MILLISECOND,
- (cal.get( Calendar.ZONE_OFFSET ) +
(cal.getTimeZone().inDaylightTime( p.getLastModified() ) ? cal.get( Calendar.DST_OFFSET ) : 0 )) );
item.addContent( new Element("pubDate").setText(fmt.format(cal.getTime())) );
list.add( item );
}
return list;
}
/**
* {@inheritDoc}
*/
@Override
public String getString()
{
WikiEngine engine = m_wikiContext.getEngine();
Element root = new Element("rss");
root.setAttribute("version","2.0");
Element channel = new Element("channel");
root.addContent( channel );
//
// Mandatory parts
//
channel.addContent( new Element("title").setText( getChannelTitle() ) );
channel.addContent( new Element("link").setText(engine.getBaseURL()));
channel.addContent( new Element("description").setText( getChannelDescription() ));
//
// Optional
//
channel.addContent( new Element("language").setText(getChannelLanguage()));
channel.addContent( new Element("generator").setText("JSPWiki "+Release.VERSTR));
String mail = engine.getVariable(m_wikiContext,RSSGenerator.PROP_RSS_AUTHOREMAIL);
if( mail != null )
{
String editor = engine.getVariable( m_wikiContext,RSSGenerator.PROP_RSS_AUTHOR );
if( editor != null )
mail = mail + " ("+editor+")";
channel.addContent( new Element("managingEditor").setText(mail) );
}
//
// Items
//
channel.addContent( getItems() );
//
// aaand output
//
XMLOutputter output = new XMLOutputter();
output.setFormat( Format.getPrettyFormat() );
try
{
StringWriter res = new StringWriter();
output.output( root, res );
return res.toString();
}
catch( IOException e )
{
return null;
}
}
}