001/* 002 Licensed to the Apache Software Foundation (ASF) under one 003 or more contributor license agreements. See the NOTICE file 004 distributed with this work for additional information 005 regarding copyright ownership. The ASF licenses this file 006 to you under the Apache License, Version 2.0 (the 007 "License"); you may not use this file except in compliance 008 with the License. You may obtain a copy of the License at 009 010 http://www.apache.org/licenses/LICENSE-2.0 011 012 Unless required by applicable law or agreed to in writing, 013 software distributed under the License is distributed on an 014 "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 KIND, either express or implied. See the License for the 016 specific language governing permissions and limitations 017 under the License. 018 */ 019package org.apache.wiki.tags; 020 021import org.apache.wiki.api.core.ContextEnum; 022import org.apache.wiki.api.core.Engine; 023import org.apache.wiki.api.core.Page; 024import org.apache.wiki.plugin.WeblogPlugin; 025import org.apache.wiki.rss.Feed; 026import org.apache.wiki.util.TextUtil; 027 028import java.io.IOException; 029 030/** 031 * Outputs links to all the site feeds and APIs this Wiki/blog supports. 032 * 033 * @since 2.2 034 */ 035public class FeedDiscoveryTag extends WikiTagBase { 036 037 private static final long serialVersionUID = 0L; 038 039 @Override 040 public final int doWikiStartTag() throws IOException { 041 final Engine engine = m_wikiContext.getEngine(); 042 final Page page = m_wikiContext.getPage(); 043 044 final String encodedName = engine.encodeName( page.getName() ); 045 final String rssURL = engine.getGlobalRSSURL(); 046 final String rssFeedURL = engine.getURL( ContextEnum.PAGE_NONE.getRequestContext(), "rss.jsp","page="+encodedName+"&mode=wiki" ); 047 048 if( rssURL != null ) { 049 String siteName = Feed.getSiteName(m_wikiContext); 050 siteName = TextUtil.replaceEntities( siteName ); 051 052 pageContext.getOut().print("<link rel=\"alternate\" type=\"application/rss+xml\" title=\"RSS wiki feed for the entire site.\" href=\""+rssURL+"\" />\n"); 053 pageContext.getOut().print("<link rel=\"alternate\" type=\"application/rss+xml\" title=\"RSS wiki feed for page "+siteName+".\" href=\""+rssFeedURL+"\" />\n"); 054 055 // TODO: Enable this 056 /* 057 pageContext.getOut().print("<link rel=\"service.post\" type=\"application/atom+xml\" title=\""+ 058 siteName+"\" href=\""+atomPostURL+"\" />\n"); 059 */ 060 // FIXME: This does not work always, as plugins are not initialized until the first fetch 061 if( "true".equals( page.getAttribute( WeblogPlugin.ATTR_ISWEBLOG ) ) ) { 062 final String blogFeedURL = engine.getURL( ContextEnum.PAGE_NONE.getRequestContext(),"rss.jsp","page="+encodedName ); 063 final String atomFeedURL = engine.getURL( ContextEnum.PAGE_NONE.getRequestContext(),"rss.jsp","page="+encodedName+"&type=atom" ); 064 065 pageContext.getOut().print("<link rel=\"alternate\" type=\"application/rss+xml\" title=\"RSS feed for weblog "+ 066 siteName+".\" href=\""+blogFeedURL+"\" />\n"); 067 068 pageContext.getOut().print("<link rel=\"service.feed\" type=\"application/atom+xml\" title=\"Atom 1.0 weblog feed for "+ 069 siteName+"\" href=\""+atomFeedURL+"\" />\n"); 070 } 071 } 072 073 return SKIP_BODY; 074 } 075 076}