mirror of
https://github.com/yacy/yacy_search_server.git
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3d8a5ae652
git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@1166 6c8d7289-2bf4-0310-a012-ef5d649a1542
216 lines
8.8 KiB
Java
216 lines
8.8 KiB
Java
//rssParser.java
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//------------------------
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//part of YaCy
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//(C) by Michael Peter Christen; mc@anomic.de
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//first published on http://www.anomic.de
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//Frankfurt, Germany, 2005
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//
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//this file is contributed by Martin Thelian
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//last major change: 16.05.2005
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//
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//This program is free software; you can redistribute it and/or modify
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//it under the terms of the GNU General Public License as published by
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//the Free Software Foundation; either version 2 of the License, or
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//(at your option) any later version.
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//
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//This program is distributed in the hope that it will be useful,
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//but WITHOUT ANY WARRANTY; without even the implied warranty of
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//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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//GNU General Public License for more details.
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//
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//You should have received a copy of the GNU General Public License
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//along with this program; if not, write to the Free Software
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//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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//Using this software in any meaning (reading, learning, copying, compiling,
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//running) means that you agree that the Author(s) is (are) not responsible
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//for cost, loss of data or any harm that may be caused directly or indirectly
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//by usage of this softare or this documentation. The usage of this software
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//is on your own risk. The installation and usage (starting/running) of this
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//software may allow other people or application to access your computer and
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//any attached devices and is highly dependent on the configuration of the
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//software which must be done by the user of the software; the author(s) is
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//(are) also not responsible for proper configuration and usage of the
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//software, even if provoked by documentation provided together with
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//the software.
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//
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//Any changes to this file according to the GPL as documented in the file
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//gpl.txt aside this file in the shipment you received can be done to the
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//lines that follows this copyright notice here, but changes must not be
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//done inside the copyright notive above. A re-distribution must contain
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//the intact and unchanged copyright notice.
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//Contributions and changes to the program code must be marked as such.
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package de.anomic.plasma.parser.rss;
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import java.io.ByteArrayInputStream;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.net.URL;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.Hashtable;
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import java.util.Iterator;
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import java.util.LinkedList;
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import java.util.Map;
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import de.anomic.htmlFilter.htmlFilterAbstractScraper;
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import de.anomic.htmlFilter.htmlFilterContentScraper;
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import de.anomic.htmlFilter.htmlFilterOutputStream;
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import de.anomic.plasma.plasmaParserDocument;
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import de.anomic.plasma.parser.AbstractParser;
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import de.anomic.plasma.parser.Parser;
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import de.anomic.plasma.parser.ParserException;
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import de.anomic.server.serverByteBuffer;
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import de.anomic.server.serverFileUtils;
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import de.nava.informa.core.ChannelIF;
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import de.nava.informa.core.ImageIF;
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import de.nava.informa.impl.basic.ChannelBuilder;
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import de.nava.informa.impl.basic.Item;
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import de.nava.informa.parsers.FeedParser;
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public class rssParser extends AbstractParser implements Parser {
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/**
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* a list of mime types that are supported by this parser class
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* @see #getSupportedMimeTypes()
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*/
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public static final Hashtable SUPPORTED_MIME_TYPES = new Hashtable();
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static {
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SUPPORTED_MIME_TYPES.put("text/rss","xml,rss,rdf");
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SUPPORTED_MIME_TYPES.put("application/rdf+xml","xml,rss,rdf");
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SUPPORTED_MIME_TYPES.put("application/rss+xml","xml,rss,rdf");
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SUPPORTED_MIME_TYPES.put("application/atom+xml","xml,atom");
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}
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/**
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* a list of library names that are needed by this parser
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* @see Parser#getLibxDependences()
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*/
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private static final String[] LIBX_DEPENDENCIES = new String[] {
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"informa-0.6.0.jar",
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"commons-logging.jar",
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"jdom.jar"
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};
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public rssParser() {
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super(LIBX_DEPENDENCIES);
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parserName = "Rich Site Summary/Atom Feed Parser";
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}
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public plasmaParserDocument parse(URL location, String mimeType,
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InputStream source) throws ParserException {
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try {
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LinkedList feedSections = new LinkedList();
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HashMap anchors = new HashMap();
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HashMap images = new HashMap();
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serverByteBuffer text = new serverByteBuffer();
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// creating a channel-builder
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ChannelBuilder builder = new ChannelBuilder();
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// parsing the rss/atom feed
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ChannelIF channel = FeedParser.parse(builder, source);
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// getting the rss feed title and description
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String feedTitle = channel.getTitle();
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// getting the feed description
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String feedDescription = channel.getDescription();
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// getting the channel site url
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//URL channelSiteURL = channel.getSite();
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ImageIF channelImage = channel.getImage();
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if (channelImage != null) {
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images.put(channelImage.getLocation().toString(),channelImage.getTitle());
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}
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// loop through the feed items
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Collection feedItemCollection = channel.getItems();
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if (!feedItemCollection.isEmpty()) {
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Iterator feedItemIterator = feedItemCollection.iterator();
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while (feedItemIterator.hasNext()) {
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Item item = (Item)feedItemIterator.next();
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String itemTitle = item.getTitle();
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URL itemURL = item.getLink();
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String itemDescr = item.getDescription();
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feedSections.add(itemTitle);
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anchors.put(itemURL.toString(),itemTitle);
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if ((text.length() != 0) && (text.byteAt(text.length() - 1) != 32)) text.append((byte) 32);
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text.append(new serverByteBuffer(htmlFilterAbstractScraper.stripAll(new serverByteBuffer(itemDescr.getBytes()))).trim()).append((byte) ' ');
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String itemContent = item.getElementValue("content");
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if ((itemContent != null) && (itemContent.length() > 0)) {
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htmlFilterContentScraper scraper = new htmlFilterContentScraper(itemURL);
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OutputStream os = new htmlFilterOutputStream(null, scraper, null, false);
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serverFileUtils.copy(new ByteArrayInputStream(itemContent.getBytes()), os);
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String itemHeadline = scraper.getHeadline();
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if ((itemHeadline != null) && (itemHeadline.length() > 0)) {
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feedSections.add(itemHeadline);
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}
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Map itemLinks = scraper.getAnchors();
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if ((itemLinks != null) && (itemLinks.size() > 0)) {
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anchors.putAll(itemLinks);
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}
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Map itemImages = scraper.getImages();
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if ((itemImages != null) && (itemImages.size() > 0)) {
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images.putAll(itemImages);
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}
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byte[] extractedText = scraper.getText();
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if ((extractedText != null) && (extractedText.length > 0)) {
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if ((text.length() != 0) && (text.byteAt(text.length() - 1) != 32)) text.append((byte) 32);
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text.append(scraper.getText());
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}
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}
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}
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}
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/* (URL location, String mimeType,
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String keywords, String shortTitle, String longTitle,
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String[] sections, String abstrct,
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byte[] text, Map anchors, Map images)
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*/
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plasmaParserDocument theDoc = new plasmaParserDocument(
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location,
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mimeType,
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null,
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null,
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feedTitle,
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(String[]) feedSections.toArray(new String[feedSections.size()]),
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feedDescription,
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text.getBytes(),
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anchors,
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images);
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return theDoc;
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} catch (Exception e) {
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}
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return null;
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}
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public Hashtable getSupportedMimeTypes() {
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return SUPPORTED_MIME_TYPES;
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}
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public void reset() {
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// TODO Auto-generated method stub
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}
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}
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