| /* |
| * 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 org.apache.tika.parser.feed; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import com.rometools.rome.feed.synd.SyndContent; |
| import com.rometools.rome.feed.synd.SyndEntry; |
| import com.rometools.rome.feed.synd.SyndFeed; |
| import com.rometools.rome.io.FeedException; |
| import com.rometools.rome.io.SyndFeedInput; |
| import org.apache.commons.io.input.CloseShieldInputStream; |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.InputSource; |
| import org.xml.sax.SAXException; |
| |
| import org.apache.tika.exception.TikaException; |
| import org.apache.tika.metadata.Metadata; |
| import org.apache.tika.metadata.TikaCoreProperties; |
| import org.apache.tika.mime.MediaType; |
| import org.apache.tika.parser.AbstractParser; |
| import org.apache.tika.parser.ParseContext; |
| import org.apache.tika.sax.XHTMLContentHandler; |
| |
| /** |
| * Feed parser. |
| * <p> |
| * Uses Rome for parsing the feeds. A feed description is put in a paragraph |
| * with its link and title in an anchor. |
| */ |
| public class FeedParser extends AbstractParser { |
| |
| /** |
| * Serial version UID |
| */ |
| private static final long serialVersionUID = -3785361933034525186L; |
| |
| private static final Set<MediaType> SUPPORTED_TYPES = Collections.unmodifiableSet( |
| new HashSet<>(Arrays.asList(MediaType.application("rss+xml"), |
| MediaType.application("atom+xml")))); |
| |
| private static String stripTags(SyndContent c) { |
| if (c == null) { |
| return ""; |
| } |
| |
| String value = c.getValue(); |
| if (value == null) { |
| return ""; |
| } |
| |
| String[] parts = value.split("<[^>]*>"); |
| StringBuilder buf = new StringBuilder(); |
| |
| for (String part : parts) |
| buf.append(part); |
| |
| return buf.toString().trim(); |
| } |
| |
| public Set<MediaType> getSupportedTypes(ParseContext context) { |
| return SUPPORTED_TYPES; |
| } |
| |
| public void parse(InputStream stream, ContentHandler handler, Metadata metadata, |
| ParseContext context) throws IOException, SAXException, TikaException { |
| // set the encoding? |
| try { |
| SyndFeed feed = |
| new SyndFeedInput().build(new InputSource(new CloseShieldInputStream(stream))); |
| |
| String title = stripTags(feed.getTitleEx()); |
| String description = stripTags(feed.getDescriptionEx()); |
| |
| metadata.set(TikaCoreProperties.TITLE, title); |
| metadata.set(TikaCoreProperties.DESCRIPTION, description); |
| // store the other fields in the metadata |
| |
| XHTMLContentHandler xhtml = new XHTMLContentHandler(handler, metadata); |
| xhtml.startDocument(); |
| |
| xhtml.element("h1", title); |
| xhtml.element("p", description); |
| |
| xhtml.startElement("ul"); |
| for (Object e : feed.getEntries()) { |
| SyndEntry entry = (SyndEntry) e; |
| String link = entry.getLink(); |
| if (link != null) { |
| xhtml.startElement("li"); |
| xhtml.startElement("a", "href", link); |
| xhtml.characters(stripTags(entry.getTitleEx())); |
| xhtml.endElement("a"); |
| SyndContent content = entry.getDescription(); |
| if (content != null) { |
| xhtml.newline(); |
| xhtml.characters(stripTags(content)); |
| } |
| xhtml.endElement("li"); |
| } |
| } |
| xhtml.endElement("ul"); |
| |
| xhtml.endDocument(); |
| } catch (FeedException e) { |
| throw new TikaException("RSS parse error", e); |
| } |
| |
| } |
| } |