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1136 lines
48 KiB
1136 lines
48 KiB
// plasmaParser.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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// last major change: 02.05.2005 by Martin Thelian
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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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// compile: javac -classpath lib/commons-collections.jar:lib/commons-pool-1.2.jar -sourcepath source source/de/anomic/plasma/plasmaParser.java
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package de.anomic.plasma;
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import java.io.BufferedInputStream;
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import java.io.ByteArrayInputStream;
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import java.io.File;
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import java.io.FileFilter;
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import java.io.FileInputStream;
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import java.io.FilenameFilter;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.UnsupportedEncodingException;
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import java.net.MalformedURLException;
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import java.net.URI;
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import java.util.Arrays;
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import java.util.Enumeration;
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import java.util.HashMap;
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import java.util.HashSet;
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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.List;
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import java.util.Map;
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import java.util.Properties;
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import java.util.Set;
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import org.apache.commons.pool.KeyedPoolableObjectFactory;
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import org.apache.commons.pool.impl.GenericKeyedObjectPool;
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import org.apache.commons.pool.impl.GenericObjectPool;
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import de.anomic.htmlFilter.htmlFilterContentScraper;
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import de.anomic.htmlFilter.htmlFilterInputStream;
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import de.anomic.htmlFilter.htmlFilterWriter;
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import de.anomic.http.httpc;
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import de.anomic.net.URL;
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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.plasma.parser.ParserInfo;
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import de.anomic.server.serverFileUtils;
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import de.anomic.server.logging.serverLog;
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public final class plasmaParser {
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public static final String PARSER_MODE_PROXY = "PROXY";
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public static final String PARSER_MODE_CRAWLER = "CRAWLER";
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public static final String PARSER_MODE_URLREDIRECTOR = "URLREDIRECTOR";
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public static final String PARSER_MODE_ICAP = "ICAP";
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public static final HashSet PARSER_MODE = new HashSet(Arrays.asList(new String[]{
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PARSER_MODE_PROXY,
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PARSER_MODE_CRAWLER,
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PARSER_MODE_ICAP,
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PARSER_MODE_URLREDIRECTOR
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}));
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private static final HashMap parserConfigList = new HashMap();
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/**
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* A list containing all installed parsers and the mimeType that they support
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* @see #loadAvailableParserList()
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*/
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static final Properties availableParserList = new Properties();
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/**
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* A list of file extensions that are supported by the html-parser and can
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* be parsed in realtime.
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*/
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static final HashSet supportedRealtimeFileExt = new HashSet();
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/**
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* A list of mimeTypes that can be parsed in Realtime (on the fly)
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*/
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static final HashSet realtimeParsableMimeTypes = new HashSet();
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private static final Properties mimeTypeLookupByFileExt = new Properties();
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static {
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// loading a list of extensions from file
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BufferedInputStream bufferedIn = null;
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try {
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mimeTypeLookupByFileExt.load(bufferedIn = new BufferedInputStream(new FileInputStream(new File("httpd.mime"))));
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} catch (IOException e) {
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System.err.println("ERROR: httpd.mime not found in settings path");
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} finally {
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if (bufferedIn != null) try{bufferedIn.close();}catch(Exception e){}
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}
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}
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/**
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* A pool of parsers.
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* @see plasmaParserPool
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* @see plasmaParserFactory
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*/
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static plasmaParserPool theParserPool;
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/**
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* A list of media extensions that should <b>not</b> be handled by the plasmaParser
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*/
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private static final HashSet mediaExtSet = new HashSet();
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/**
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* A list of image, audio, video and application extensions
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*/
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private static final HashSet imageExtSet = new HashSet();
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private static final HashSet audioExtSet = new HashSet();
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private static final HashSet videoExtSet = new HashSet();
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private static final HashSet appsExtSet = new HashSet();
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/**
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* This {@link FilenameFilter} is used to find all classes based on there filenames
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* which seems to be additional content parsers.
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* Currently the filenames of all content parser classes must end with <code>Parser.class</code>
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*/
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private static final FilenameFilter parserFileNameFilter = new FilenameFilter() {
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public boolean accept(File dir, String name) {
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return name.endsWith("Parser.class");
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}
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};
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/**
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* This {@link FileFilter} is used to get all subpackages
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* of the parser package.
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*/
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private static final FileFilter parserDirectoryFilter = new FileFilter() {
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public boolean accept(File file) {
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return file.isDirectory();
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}
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};
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/**
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* Initializing the
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* @see #initMediaExt(String)
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*/
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static {
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String apps = "sit,hqx,img,dmg,exe,com,bat,sh";
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String audio = "mp2,mp3,ogg,aac,aif,aiff,wav";
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String video = "swf,avi,wmv,rm,mov,mpg,mpeg,ram,m4v";
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String image = "jpg,jpeg,jpe,gif,png";
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initMediaExt(extString2extList(
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apps + "," + // application container
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"tar,gz,bz2,arj,zip,rar," + // archive formats
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"ps,xls,ppt,asf," + // text formats without support
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audio + "," + // audio formats
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video + "," + // video formats
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image // image formats
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));
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initImageExt(extString2extList(image)); // image formats
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initAudioExt(extString2extList(audio)); // audio formats
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initVideoExt(extString2extList(video)); // video formats
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initAppsExt(extString2extList(apps)); // application formats
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/* ===================================================
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* initializing the parser object pool
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* =================================================== */
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GenericKeyedObjectPool.Config config = new GenericKeyedObjectPool.Config();
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// The maximum number of active connections that can be allocated from pool at the same time,
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// 0 for no limit
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config.maxActive = 0;
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// The maximum number of idle connections connections in the pool
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// 0 = no limit.
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config.maxIdle = 5;
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config.whenExhaustedAction = GenericObjectPool.WHEN_EXHAUSTED_BLOCK;
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config.minEvictableIdleTimeMillis = 30000;
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plasmaParser.theParserPool = new plasmaParserPool(new plasmaParserFactory(),config);
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/* ===================================================
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* loading a list of available parsers
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* =================================================== */
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loadAvailableParserList();
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}
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private serverLog theLogger = new serverLog("PARSER");
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public serverLog getLogger() {
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return this.theLogger;
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}
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public static HashMap getParserConfigList() {
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return parserConfigList;
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}
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/**
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* This function is used to initialize the realtimeParsableMimeTypes List.
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* This list contains a list of mimeTypes that can be parsed in realtime by
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* the yacy html-Parser
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* @param realtimeParsableMimeTypes a list of mimetypes that can be parsed by the
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* yacy html parser
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*/
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public static void initRealtimeParsableMimeTypes(String realtimeParsableMimeTypes) {
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LinkedList mimeTypes = new LinkedList();
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if ((realtimeParsableMimeTypes == null) || (realtimeParsableMimeTypes.length() == 0)) {
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// Nothing todo here
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} else {
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String[] realtimeParsableMimeTypeList = realtimeParsableMimeTypes.split(",");
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for (int i = 0; i < realtimeParsableMimeTypeList.length; i++) mimeTypes.add(realtimeParsableMimeTypeList[i].toLowerCase().trim());
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}
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initRealtimeParsableMimeTypes(mimeTypes);
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}
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/**
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* This function is used to initialize the realtimeParsableMimeTypes List.
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* This list contains a list of mimeTypes that can be parsed in realtime by
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* the yacy html-Parser
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* @param realtimeParsableMimeTypes a list of mimetypes that can be parsed by the
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* yacy html parser
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*/
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public static void initRealtimeParsableMimeTypes(List mimeTypesList) {
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synchronized (realtimeParsableMimeTypes) {
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realtimeParsableMimeTypes.clear();
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realtimeParsableMimeTypes.addAll(mimeTypesList);
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}
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}
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public static List extString2extList(String extString) {
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LinkedList extensions = new LinkedList();
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if ((extString == null) || (extString.length() == 0)) {
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return extensions;
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} else {
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String[] xs = extString.split(",");
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for (int i = 0; i < xs.length; i++) extensions.add(xs[i].toLowerCase().trim());
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}
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return extensions;
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}
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public static void initMediaExt(List mediaExtList) {
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synchronized (mediaExtSet) {
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mediaExtSet.clear();
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mediaExtSet.addAll(mediaExtList);
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}
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}
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public static void initImageExt(List imageExtList) {
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synchronized (imageExtSet) {
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imageExtSet.clear();
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imageExtSet.addAll(imageExtList);
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}
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}
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public static void initAudioExt(List audioExtList) {
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synchronized (audioExtSet) {
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audioExtSet.clear();
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audioExtSet.addAll(audioExtList);
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}
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}
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public static void initVideoExt(List videoExtList) {
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synchronized (videoExtSet) {
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videoExtSet.clear();
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videoExtSet.addAll(videoExtList);
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}
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}
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public static void initAppsExt(List appsExtList) {
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synchronized (appsExtSet) {
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appsExtSet.clear();
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appsExtSet.addAll(appsExtList);
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}
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}
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public static String getMediaExtList() {
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synchronized (mediaExtSet) {
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return mediaExtSet.toString();
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}
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}
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public static void initSupportedRealtimeFileExt(List supportedRealtimeFileExtList) {
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synchronized (supportedRealtimeFileExt) {
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supportedRealtimeFileExt.clear();
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supportedRealtimeFileExt.addAll(supportedRealtimeFileExtList);
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}
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}
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public static boolean realtimeParsableMimeTypesContains(String mimeType) {
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mimeType = getRealMimeType(mimeType);
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synchronized (realtimeParsableMimeTypes) {
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return realtimeParsableMimeTypes.contains(mimeType);
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}
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}
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public static boolean supportedRealTimeContent(URL url, String mimeType) {
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return realtimeParsableMimeTypesContains(mimeType) && supportedRealtimeFileExtContains(url);
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}
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public static boolean supportedRealtimeFileExtContains(URL url) {
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String fileExt = getFileExt(url);
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synchronized (supportedRealtimeFileExt) {
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return supportedRealtimeFileExt.contains(fileExt);
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}
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}
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public static String getFileExt(URL url) {
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// getting the file path
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String name = url.getPath();
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// tetermining last position of / in the file path
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int p = name.lastIndexOf('/');
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if (p != -1) {
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name = name.substring(p);
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}
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// termining last position of . in file path
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p = name.lastIndexOf('.');
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if (p < 0) return "";
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return name.substring(p + 1);
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}
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public static boolean mediaExtContains(String mediaExt) {
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if (mediaExt == null) return false;
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mediaExt = mediaExt.trim().toLowerCase();
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synchronized (supportedRealtimeFileExt) {
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if (supportedRealtimeFileExt.contains(mediaExt)) return false;
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}
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if (supportedFileExtContains(mediaExt)) return false;
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synchronized (mediaExtSet) {
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return mediaExtSet.contains(mediaExt);
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}
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}
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public static boolean imageExtContains(String imageExt) {
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if (imageExt == null) return false;
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synchronized (imageExtSet) {
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return imageExtSet.contains(imageExt.trim().toLowerCase());
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}
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}
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public static boolean audioExtContains(String audioExt) {
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if (audioExt == null) return false;
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synchronized (audioExtSet) {
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return audioExtSet.contains(audioExt.trim().toLowerCase());
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}
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}
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public static boolean videoExtContains(String videoExt) {
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if (videoExt == null) return false;
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synchronized (videoExtSet) {
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return videoExtSet.contains(videoExt.trim().toLowerCase());
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}
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}
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public static boolean appsExtContains(String appsExt) {
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if (appsExt == null) return false;
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synchronized (appsExtSet) {
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return appsExtSet.contains(appsExt.trim().toLowerCase());
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}
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}
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public static String getRealCharsetEncoding(String encoding) {
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if ((encoding == null) || (encoding.length() == 0)) return "ISO-8859-1";
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// trim encoding string
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encoding = encoding.trim();
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if (encoding.toLowerCase().startsWith("windows") && encoding.length() > 7) {
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char c = encoding.charAt(7);
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if (c == '_') encoding = "windows-" + encoding.substring(8);
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else if ((c >= '0') && (c <= '9')) encoding = "windows-" + encoding.substring(7);
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}
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if (encoding.toLowerCase().startsWith("iso") && encoding.length() > 3) {
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char c = encoding.charAt(3);
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if (c == '_') encoding = "ISO-" + encoding.substring(4);
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else if ((c >= '0') && (c <= '9')) encoding = "ISO-" + encoding.substring(3);
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}
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if (encoding.toLowerCase().startsWith("iso") && encoding.length() > 8) {
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char c = encoding.charAt(8);
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if (c == '_') encoding = encoding.substring(0,8) + "-" + encoding.substring(9);
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else if ((c >= '0') && (c <= '9')) encoding = encoding.substring(0,8) + "-" + encoding.substring(8);
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}
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// converting cp\d{4} -> windows-\d{4}
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if (encoding.toLowerCase().matches("cp([_-])?125[0-8]")) {
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char c = encoding.charAt(2);
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if (c == '_' || c == '-') encoding = "windows-" + encoding.substring(3);
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else if ((c >= '0') && (c <= '9')) encoding = "windows-" + encoding.substring(2);
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}
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if (encoding.toLowerCase().matches("gb[_-]?2312([-_]80)?")) {
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encoding = "x-EUC-CN";
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}
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if (encoding.toLowerCase().matches(".*utf[-_]?8.*")) {
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encoding = "UTF-8";
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}
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return encoding;
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}
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public static String getRealMimeType(String mimeType) {
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//if (mimeType == null) doMimeTypeAnalysis
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if (mimeType == null) mimeType = "application/octet-stream";
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mimeType = mimeType.trim().toLowerCase();
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int pos = mimeType.indexOf(';');
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return ((pos < 0) ? mimeType : mimeType.substring(0, pos));
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}
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public static String getMimeTypeByFileExt(String fileExt) {
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return mimeTypeLookupByFileExt.getProperty(fileExt,"application/octet-stream");
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}
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public Hashtable getAvailableParserList() {
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return plasmaParser.availableParserList;
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}
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private static void loadAvailableParserList() {
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try {
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plasmaParser.availableParserList.clear();
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// getting the current java classpath
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String javaClassPath = System.getProperty("java.class.path");
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// getting the current package name
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String plasmaParserPkgName = plasmaParser.class.getPackage().getName() + ".parser";
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serverLog.logInfo("PARSER","Searching for additional content parsers in package " + plasmaParserPkgName);
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// getting an uri to the parser subpackage
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String packageURI = plasmaParser.class.getResource("/"+plasmaParserPkgName.replace('.','/')).toString();
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serverLog.logFine("PARSER", "Parser directory is " + packageURI);
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// open the parser directory
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File parserDir = new File(new URI(packageURI));
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if ((parserDir == null) || (!parserDir.exists()) || (!parserDir.isDirectory())) return;
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|
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/*
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* loop through all subdirectories and test if we can
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* find an additional parser class
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*/
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File[] parserDirectories = parserDir.listFiles(parserDirectoryFilter);
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if (parserDirectories == null) return;
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for (int parserDirNr=0; parserDirNr< parserDirectories.length; parserDirNr++) {
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File currentDir = parserDirectories[parserDirNr];
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serverLog.logFine("PARSER", "Searching in directory " + currentDir.toString());
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String[] parserClasses = currentDir.list(parserFileNameFilter);
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if (parserClasses == null) continue;
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for (int parserNr=0; parserNr<parserClasses.length; parserNr++) {
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serverLog.logFine("PARSER", "Testing parser class " + parserClasses[parserNr]);
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String className = parserClasses[parserNr].substring(0,parserClasses[parserNr].indexOf(".class"));
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String fullClassName = plasmaParserPkgName + "." + currentDir.getName() + "." + className;
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try {
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// trying to load the parser class by its name
|
|
Class parserClass = Class.forName(fullClassName);
|
|
Object theParser = parserClass.newInstance();
|
|
if (!(theParser instanceof Parser)) continue;
|
|
|
|
// testing if all needed libx libraries are available
|
|
String[] neededLibx = ((Parser)theParser).getLibxDependences();
|
|
StringBuffer neededLibxBuf = new StringBuffer();
|
|
if (neededLibx != null) {
|
|
for (int libxId=0; libxId < neededLibx.length; libxId++) {
|
|
if (javaClassPath.indexOf(neededLibx[libxId]) == -1) {
|
|
throw new Exception("Missing dependency detected: '" + neededLibx[libxId] + "'.");
|
|
}
|
|
neededLibxBuf.append(neededLibx[libxId])
|
|
.append(",");
|
|
}
|
|
if (neededLibxBuf.length()>0) neededLibxBuf.deleteCharAt(neededLibxBuf.length()-1);
|
|
}
|
|
|
|
// loading the list of mime-types that are supported by this parser class
|
|
Hashtable supportedMimeTypes = ((Parser)theParser).getSupportedMimeTypes();
|
|
|
|
// creating a parser info object
|
|
ParserInfo parserInfo = new ParserInfo();
|
|
parserInfo.parserClass = parserClass;
|
|
parserInfo.parserClassName = fullClassName;
|
|
parserInfo.libxDependencies = neededLibx;
|
|
parserInfo.supportedMimeTypes = supportedMimeTypes;
|
|
parserInfo.parserVersionNr = ((Parser)theParser).getVersion();
|
|
parserInfo.parserName = ((Parser)theParser).getName();
|
|
|
|
Iterator mimeTypeIterator = supportedMimeTypes.keySet().iterator();
|
|
while (mimeTypeIterator.hasNext()) {
|
|
String mimeType = (String) mimeTypeIterator.next();
|
|
availableParserList.put(mimeType,parserInfo );
|
|
serverLog.logInfo("PARSER", "Found functional parser for mimeType '" + mimeType + "'." +
|
|
"\n\tName: " + parserInfo.parserName +
|
|
"\n\tVersion: " + parserInfo.parserVersionNr +
|
|
"\n\tClass: " + parserInfo.parserClassName +
|
|
((neededLibxBuf.length()>0)?"\n\tDependencies: " + neededLibxBuf.toString():""));
|
|
}
|
|
|
|
} catch (Exception e) { /* we can ignore this for the moment */
|
|
serverLog.logWarning("PARSER", "Parser '" + className + "' doesn't work correctly and will be ignored.\n [" + e.getClass().getName() + "]: " + e.getMessage());
|
|
} catch (Error e) { /* we can ignore this for the moment */
|
|
serverLog.logWarning("PARSER", "Parser '" + className + "' doesn't work correctly and will be ignored.\n [" + e.getClass().getName() + "]: " + e.getMessage());
|
|
}
|
|
}
|
|
}
|
|
|
|
} catch (Exception e) {
|
|
serverLog.logSevere("PARSER", "Unable to determine all installed parsers. " + e.getMessage());
|
|
}
|
|
}
|
|
|
|
public void close() {
|
|
// clearing the parser list
|
|
Iterator configs = parserConfigList.values().iterator();
|
|
while (configs.hasNext()) {
|
|
plasmaParserConfig currentConfig = (plasmaParserConfig) configs.next();
|
|
synchronized (currentConfig.enabledParserList) {
|
|
currentConfig.enabledParserList.clear();
|
|
}
|
|
}
|
|
|
|
// closing the parser object pool
|
|
try {
|
|
theParserPool.close();
|
|
} catch (Exception e) {/* ignore this */}
|
|
}
|
|
|
|
public plasmaParserDocument parseSource(URL location, String mimeType, String charset, byte[] sourceArray)
|
|
throws InterruptedException, ParserException {
|
|
ByteArrayInputStream byteIn = null;
|
|
try {
|
|
if (this.theLogger.isFine())
|
|
this.theLogger.logFine("Parsing '" + location + "' from byte-array");
|
|
|
|
// testing if the resource is not empty
|
|
if (sourceArray == null || sourceArray.length == 0) {
|
|
String errorMsg = "No resource content available.";
|
|
this.theLogger.logInfo("Unable to parse '" + location + "'. " + errorMsg);
|
|
throw new ParserException(errorMsg,location,plasmaCrawlEURL.DENIED_NOT_PARSEABLE_NO_CONTENT);
|
|
}
|
|
|
|
// creating an InputStream
|
|
byteIn = new ByteArrayInputStream(sourceArray);
|
|
|
|
// parsing the temp file
|
|
return parseSource(location, mimeType, charset, sourceArray.length, byteIn);
|
|
|
|
} catch (Exception e) {
|
|
// Interrupted- and Parser-Exceptions should pass through
|
|
if (e instanceof InterruptedException) throw (InterruptedException) e;
|
|
if (e instanceof ParserException) throw (ParserException) e;
|
|
|
|
// log unexpected error
|
|
this.theLogger.logSevere("Unexpected exception in parseSource from byte-array: " + e.getMessage(), e);
|
|
throw new ParserException("Unexpected exception while parsing " + location,location, e);
|
|
} finally {
|
|
if (byteIn != null) try { byteIn.close(); } catch (Exception ex){/* ignore this */}
|
|
}
|
|
|
|
}
|
|
|
|
public plasmaParserDocument parseSource(URL location, String theMimeType, String theDocumentCharset, File sourceFile) throws InterruptedException, ParserException {
|
|
|
|
BufferedInputStream sourceStream = null;
|
|
try {
|
|
if (this.theLogger.isFine())
|
|
this.theLogger.logFine("Parsing '" + location + "' from file");
|
|
|
|
// testing if the resource is not empty
|
|
if (!(sourceFile.exists() && sourceFile.canRead() && sourceFile.length() > 0)) {
|
|
String errorMsg = sourceFile.exists() ? "Empty resource file." : "No resource content available.";
|
|
this.theLogger.logInfo("Unable to parse '" + location + "'. " + errorMsg);
|
|
throw new ParserException(errorMsg,location,plasmaCrawlEURL.DENIED_NOT_PARSEABLE_NO_CONTENT);
|
|
}
|
|
|
|
// create a new InputStream
|
|
sourceStream = new BufferedInputStream(new FileInputStream(sourceFile));
|
|
|
|
// parsing the data
|
|
return this.parseSource(location, theMimeType, theDocumentCharset, sourceFile.length(), sourceStream);
|
|
|
|
} catch (Exception e) {
|
|
// Interrupted- and Parser-Exceptions should pass through
|
|
if (e instanceof InterruptedException) throw (InterruptedException) e;
|
|
if (e instanceof ParserException) throw (ParserException) e;
|
|
|
|
// log unexpected error
|
|
this.theLogger.logSevere("Unexpected exception in parseSource from File: " + e.getMessage(), e);
|
|
throw new ParserException("Unexpected exception while parsing " + location,location, e);
|
|
} finally {
|
|
if (sourceStream != null) try { sourceStream.close(); } catch (Exception ex){/* ignore this */}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* To parse a resource from an {@link InputStream}
|
|
* @param location the URL of the resource
|
|
* @param theMimeType the resource mimetype (<code>null</code> if unknown)
|
|
* @param theDocumentCharset the charset of the resource (<code>null</code> if unknown)
|
|
* @param contentLength the content length of the resource (<code>-1</code> if unknown)
|
|
* @param sourceStream an {@link InputStream} containing the resource body
|
|
* @return the parsed {@link plasmaParserDocument document}
|
|
* @throws InterruptedException
|
|
* @throws ParserException
|
|
*/
|
|
public plasmaParserDocument parseSource(URL location, String theMimeType, String theDocumentCharset, long contentLength, InputStream sourceStream) throws InterruptedException, ParserException {
|
|
Parser theParser = null;
|
|
String mimeType = null;
|
|
try {
|
|
if (this.theLogger.isFine())
|
|
this.theLogger.logFine("Parsing '" + location + "' from stream");
|
|
|
|
// getting the mimetype of the document
|
|
mimeType = getRealMimeType(theMimeType);
|
|
|
|
// getting the file extension of the document
|
|
String fileExt = getFileExt(location);
|
|
|
|
// getting the charset of the document
|
|
// TODO: do a charset detection here ....
|
|
String documentCharset = getRealCharsetEncoding(theDocumentCharset);
|
|
|
|
// testing if parsing is supported for this resource
|
|
if (!plasmaParser.supportedContent(location,mimeType)) {
|
|
String errorMsg = "No parser available to parse mimetype '" + mimeType + "'";
|
|
this.theLogger.logInfo("Unable to parse '" + location + "'. " + errorMsg);
|
|
throw new ParserException(errorMsg,location,plasmaCrawlEURL.DENIED_WRONG_MIMETYPE_OR_EXT);
|
|
}
|
|
|
|
if (this.theLogger.isFine())
|
|
this.theLogger.logInfo("Parsing " + location + " with mimeType '" + mimeType +
|
|
"' and file extension '" + fileExt + "'.");
|
|
|
|
// getting the correct parser for the given mimeType
|
|
theParser = this.getParser(mimeType);
|
|
|
|
// if a parser was found we use it ...
|
|
plasmaParserDocument doc = null;
|
|
if (theParser != null) {
|
|
// set the content length of the resource
|
|
theParser.setContentLength(contentLength);
|
|
// parse the resource
|
|
doc = theParser.parse(location, mimeType,documentCharset,sourceStream);
|
|
} else if (realtimeParsableMimeTypesContains(mimeType)) {
|
|
doc = parseHtml(location, mimeType, documentCharset, sourceStream);
|
|
} else {
|
|
String errorMsg = "No parser available to parse mimetype '" + mimeType + "'";
|
|
this.theLogger.logInfo("Unable to parse '" + location + "'. " + errorMsg);
|
|
throw new ParserException(errorMsg,location,plasmaCrawlEURL.DENIED_WRONG_MIMETYPE_OR_EXT);
|
|
}
|
|
|
|
// check result
|
|
if (doc == null) {
|
|
String errorMsg = "Unexpected error. Parser returned null.";
|
|
this.theLogger.logInfo("Unable to parse '" + location + "'. " + errorMsg);
|
|
throw new ParserException(errorMsg,location);
|
|
}
|
|
return doc;
|
|
|
|
} catch (UnsupportedEncodingException e) {
|
|
String errorMsg = "Unsupported charset encoding: " + e.getMessage();
|
|
this.theLogger.logSevere("Unable to parse '" + location + "'. " + errorMsg);
|
|
throw new ParserException(errorMsg,location,plasmaCrawlEURL.DENIED_UNSUPPORTED_CHARSET);
|
|
} catch (Exception e) {
|
|
// Interrupted- and Parser-Exceptions should pass through
|
|
if (e instanceof InterruptedException) throw (InterruptedException) e;
|
|
if (e instanceof ParserException) throw (ParserException) e;
|
|
|
|
// log unexpected error
|
|
String errorMsg = "Unexpected exception. " + e.getMessage();
|
|
this.theLogger.logSevere("Unable to parse '" + location + "'. " + errorMsg, e);
|
|
throw new ParserException(errorMsg,location,e);
|
|
|
|
} finally {
|
|
if (theParser != null) {
|
|
try { plasmaParser.theParserPool.returnObject(mimeType, theParser); } catch (Exception e) { /* ignore this */}
|
|
}
|
|
}
|
|
}
|
|
|
|
private plasmaParserDocument parseHtml(URL location, String mimeType, String documentCharset, InputStream sourceStream) throws IOException, ParserException {
|
|
|
|
// ...otherwise we make a scraper and transformer
|
|
htmlFilterInputStream htmlFilter = new htmlFilterInputStream(sourceStream,documentCharset,location,null,false);
|
|
String charset = htmlFilter.detectCharset();
|
|
if (charset == null) {
|
|
charset = documentCharset;
|
|
} else {
|
|
charset = getRealCharsetEncoding(charset);
|
|
}
|
|
|
|
if (!documentCharset.equalsIgnoreCase(charset)) {
|
|
this.theLogger.logInfo("Charset transformation needed from '" + documentCharset + "' to '" + charset + "'");
|
|
}
|
|
|
|
// parsing the content
|
|
htmlFilterContentScraper scraper = new htmlFilterContentScraper(location);
|
|
htmlFilterWriter writer = new htmlFilterWriter(null,null,scraper,null,false);
|
|
serverFileUtils.copy(htmlFilter, writer, charset);
|
|
writer.close();
|
|
//OutputStream hfos = new htmlFilterOutputStream(null, scraper, null, false);
|
|
//serverFileUtils.copy(sourceFile, hfos);
|
|
//hfos.close();
|
|
if (writer.binarySuspect()) {
|
|
String errorMsg = "Binary data found in resource";
|
|
this.theLogger.logSevere("Unable to parse '" + location + "'. " + errorMsg);
|
|
throw new ParserException(errorMsg,location);
|
|
}
|
|
return transformScraper(location, mimeType, documentCharset, scraper);
|
|
}
|
|
|
|
public plasmaParserDocument transformScraper(URL location, String mimeType, String charSet, htmlFilterContentScraper scraper) {
|
|
try {
|
|
String[] sections = new String[scraper.getHeadlines(1).length + scraper.getHeadlines(2).length + scraper.getHeadlines(3).length + scraper.getHeadlines(4).length];
|
|
int p = 0;
|
|
for (int i = 1; i <= 4; i++) for (int j = 0; j < scraper.getHeadlines(i).length; j++) sections[p++] = scraper.getHeadlines(i)[j];
|
|
plasmaParserDocument ppd = new plasmaParserDocument(new URL(location.toNormalform()),
|
|
mimeType, charSet, scraper.getKeywords(),
|
|
scraper.getTitle(), scraper.getTitle(),
|
|
sections, scraper.getDescription(),
|
|
scraper.getText(), scraper.getAnchors(), scraper.getImages());
|
|
//scraper.close();
|
|
return ppd;
|
|
} catch (MalformedURLException e) {
|
|
//e.printStackTrace();
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This function is used to determine the parser class that should be used for a given
|
|
* mimetype ...
|
|
* @param mimeType
|
|
* @return
|
|
*/
|
|
private Parser getParser(String mimeType) {
|
|
|
|
mimeType = getRealMimeType(mimeType);
|
|
try {
|
|
|
|
// determining the proper parser class name for the mimeType
|
|
String parserClassName = null;
|
|
ParserInfo parserInfo = null;
|
|
synchronized (plasmaParser.availableParserList) {
|
|
if (plasmaParser.availableParserList.containsKey(mimeType)) {
|
|
parserInfo = (ParserInfo)plasmaParser.availableParserList.get(mimeType);
|
|
parserClassName = parserInfo.parserClassName;
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
// fetching a new parser object from pool
|
|
Parser theParser = (Parser) theParserPool.borrowObject(parserClassName);
|
|
|
|
// checking if the created parser really supports the given mimetype
|
|
Hashtable supportedMimeTypes = theParser.getSupportedMimeTypes();
|
|
if ((supportedMimeTypes != null) && (supportedMimeTypes.containsKey(mimeType))) {
|
|
parserInfo.incUsageCounter();
|
|
return theParser;
|
|
}
|
|
theParserPool.returnObject(parserClassName,theParser);
|
|
|
|
} catch (Exception e) {
|
|
System.err.println("ERROR: Unable to load the correct parser for type " + mimeType);
|
|
}
|
|
|
|
return null;
|
|
|
|
}
|
|
|
|
/*
|
|
public static String urlNormalform(URL url) {
|
|
if (url == null) return null;
|
|
return urlNormalform(url.toString());
|
|
}
|
|
|
|
public static String urlNormalform(String us) {
|
|
return htmlFilterContentScraper.urlNormalform(us);
|
|
}
|
|
*/
|
|
|
|
static Map allReflinks(Map links) {
|
|
// we find all links that are part of a reference inside a url
|
|
HashMap v = new HashMap();
|
|
Iterator i = links.keySet().iterator();
|
|
String s;
|
|
int pos;
|
|
loop: while (i.hasNext()) {
|
|
s = (String) i.next();
|
|
if ((pos = s.toLowerCase().indexOf("http://",7)) > 0) {
|
|
i.remove();
|
|
s = s.substring(pos);
|
|
while ((pos = s.toLowerCase().indexOf("http://",7)) > 0) s = s.substring(pos);
|
|
if (!(v.containsKey(s))) v.put(s, "ref");
|
|
continue loop;
|
|
}
|
|
if ((pos = s.toLowerCase().indexOf("/www.",7)) > 0) {
|
|
i.remove();
|
|
s = "http:/" + s.substring(pos);
|
|
while ((pos = s.toLowerCase().indexOf("/www.",7)) > 0) s = "http:/" + s.substring(pos);
|
|
if (!(v.containsKey(s))) v.put(s, "ref");
|
|
continue loop;
|
|
}
|
|
}
|
|
return v;
|
|
}
|
|
|
|
static Map allSubpaths(Map links) {
|
|
HashMap v = new HashMap();
|
|
Iterator i = links.keySet().iterator();
|
|
String s;
|
|
int pos;
|
|
while (i.hasNext()) {
|
|
s = (String) i.next();
|
|
if (s.endsWith("/")) s = s.substring(0, s.length() - 1);
|
|
pos = s.lastIndexOf("/");
|
|
while (pos > 8) {
|
|
s = s.substring(0, pos + 1);
|
|
if (!(v.containsKey(s))) v.put(s, "sub");
|
|
s = s.substring(0, pos);
|
|
pos = s.lastIndexOf("/");
|
|
}
|
|
}
|
|
return v;
|
|
}
|
|
|
|
public static void main(String[] args) {
|
|
//javac -classpath lib/commons-collections.jar:lib/commons-pool-1.2.jar -sourcepath source source/de/anomic/plasma/plasmaParser.java
|
|
//java -cp source:lib/commons-collections.jar:lib/commons-pool-1.2.jar de.anomic.plasma.plasmaParser bug.html bug.out
|
|
httpc remote = null;
|
|
try {
|
|
Object content = null;
|
|
URL contentURL = null;
|
|
long contentLength = -1;
|
|
String contentMimeType = "application/octet-stream";
|
|
String charSet = "UTF-8";
|
|
|
|
if (args.length < 2) {
|
|
System.err.println("Usage: java de.anomic.plasma.plasmaParser (-f filename|-u URL) [-m mimeType]");
|
|
}
|
|
|
|
String mode = args[0];
|
|
if (mode.equalsIgnoreCase("-f")) {
|
|
content = new File(args[1]);
|
|
contentURL = new URL((File)content);
|
|
} else if (mode.equalsIgnoreCase("-u")) {
|
|
contentURL = new URL(args[1]);
|
|
|
|
// downloading the document content
|
|
remote = httpc.getInstance(
|
|
contentURL.getHost(),
|
|
contentURL.getHost(),
|
|
contentURL.getPort(),
|
|
5000,
|
|
contentURL.getProtocol().equalsIgnoreCase("https"));
|
|
|
|
httpc.response res = remote.GET(contentURL.getFile(), null);
|
|
if (res.statusCode != 200) {
|
|
System.err.println("Unable to download " + contentURL + ". " + res.status);
|
|
return;
|
|
}
|
|
content = res.getContentInputStream();
|
|
contentMimeType = res.responseHeader.mime();
|
|
charSet = res.responseHeader.getCharacterEncoding();
|
|
contentLength = res.responseHeader.contentLength();
|
|
}
|
|
|
|
if ((args.length >= 4)&&(args[2].equalsIgnoreCase("-m"))) {
|
|
contentMimeType = args[3];
|
|
}
|
|
|
|
if ((args.length >= 6)&&(args[4].equalsIgnoreCase("-c"))) {
|
|
charSet = args[5];
|
|
}
|
|
|
|
// creating a plasma parser
|
|
plasmaParser theParser = new plasmaParser();
|
|
|
|
// configuring the realtime parsable mimeTypes
|
|
plasmaParser.initRealtimeParsableMimeTypes("application/xhtml+xml,text/html,text/plain");
|
|
|
|
// configure all other supported mimeTypes
|
|
plasmaParser.enableAllParsers(PARSER_MODE_PROXY);
|
|
|
|
// parsing the content
|
|
plasmaParserDocument document = null;
|
|
if (content instanceof byte[]) {
|
|
document = theParser.parseSource(contentURL, contentMimeType, charSet, (byte[])content);
|
|
} else if (content instanceof File) {
|
|
document = theParser.parseSource(contentURL, contentMimeType, charSet, (File)content);
|
|
} else if (content instanceof InputStream) {
|
|
document = theParser.parseSource(contentURL, contentMimeType, charSet, contentLength, (InputStream)content);
|
|
}
|
|
|
|
// printing out all parsed sentences
|
|
if (document != null) {
|
|
System.out.print("Document titel: ");
|
|
System.out.println(document.getMainLongTitle());
|
|
|
|
// found text
|
|
final Enumeration sentences = document.getSentences(false);
|
|
int i = 0;
|
|
if (sentences != null) while (sentences.hasMoreElements()) {
|
|
System.out.print("line " + i + ": ");
|
|
System.out.println((String) sentences.nextElement());
|
|
i++;
|
|
}
|
|
|
|
// found links
|
|
int anchorNr = 0;
|
|
Map anchors = document.getAnchors();
|
|
Iterator anchorIter = anchors.keySet().iterator();
|
|
while (anchorIter.hasNext()) {
|
|
String key = (String) anchorIter.next();
|
|
System.out.println("URL " + anchorNr + ":\t" + key + " | " + anchors.get(key));
|
|
anchorNr++;
|
|
}
|
|
document.close();
|
|
}
|
|
} catch (Exception e) {
|
|
e.printStackTrace();
|
|
} finally {
|
|
if (remote != null) try { httpc.returnInstance(remote); } catch (Exception e) {}
|
|
}
|
|
}
|
|
|
|
private static void enableAllParsers(String parserMode) {
|
|
if (!PARSER_MODE.contains(parserMode)) throw new IllegalArgumentException();
|
|
|
|
plasmaParserConfig config = (plasmaParserConfig) parserConfigList.get(parserMode);
|
|
if (config == null) {
|
|
config = new plasmaParserConfig(parserMode);
|
|
parserConfigList.put(parserMode, config);
|
|
}
|
|
config.enableAllParsers();
|
|
}
|
|
|
|
public static boolean supportedContent(URL url, String mimeType) {
|
|
if (url == null) throw new NullPointerException();
|
|
|
|
Iterator configs = parserConfigList.values().iterator();
|
|
while (configs.hasNext()) {
|
|
plasmaParserConfig currentConfig = (plasmaParserConfig) configs.next();
|
|
synchronized (currentConfig.enabledParserList) {
|
|
if (currentConfig.supportedContent(url, mimeType)) return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
public static boolean supportedContent(String parserMode, URL url, String mimeType) {
|
|
if (!PARSER_MODE.contains(parserMode)) throw new IllegalArgumentException();
|
|
if (url == null) throw new NullPointerException();
|
|
|
|
plasmaParserConfig config = (plasmaParserConfig) parserConfigList.get(parserMode);
|
|
return (config == null)?false:config.supportedContent(url, mimeType);
|
|
}
|
|
|
|
public static void initParseableMimeTypes(String parserMode, String configStr) {
|
|
if (!PARSER_MODE.contains(parserMode)) throw new IllegalArgumentException();
|
|
|
|
plasmaParserConfig config = (plasmaParserConfig) parserConfigList.get(parserMode);
|
|
if (config == null) {
|
|
config = new plasmaParserConfig(parserMode);
|
|
parserConfigList.put(parserMode, config);
|
|
}
|
|
config.initParseableMimeTypes(configStr);
|
|
}
|
|
|
|
public static String[] setEnabledParserList(String parserMode, Set mimeTypeSet) {
|
|
if (!PARSER_MODE.contains(parserMode)) throw new IllegalArgumentException();
|
|
|
|
plasmaParserConfig config = (plasmaParserConfig) parserConfigList.get(parserMode);
|
|
if (config == null) {
|
|
config = new plasmaParserConfig(parserMode);
|
|
parserConfigList.put(parserMode, config);
|
|
}
|
|
return config.setEnabledParserList(mimeTypeSet);
|
|
}
|
|
|
|
public static boolean supportedFileExtContains(String fileExt) {
|
|
Iterator configs = parserConfigList.values().iterator();
|
|
while (configs.hasNext()) {
|
|
plasmaParserConfig currentConfig = (plasmaParserConfig) configs.next();
|
|
synchronized (currentConfig.enabledParserList) {
|
|
if (currentConfig.supportedFileExtContains(fileExt)) return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
public static boolean supportedMimeTypesContains(String mimeType) {
|
|
Iterator configs = parserConfigList.values().iterator();
|
|
while (configs.hasNext()) {
|
|
plasmaParserConfig currentConfig = (plasmaParserConfig) configs.next();
|
|
synchronized (currentConfig.enabledParserList) {
|
|
if (currentConfig.supportedMimeTypesContains(mimeType)) return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
}
|
|
|
|
final class plasmaParserFactory implements KeyedPoolableObjectFactory {
|
|
|
|
public plasmaParserFactory() {
|
|
super();
|
|
}
|
|
|
|
/**
|
|
* @see org.apache.commons.pool.PoolableObjectFactory#makeObject()
|
|
*/
|
|
public Object makeObject(Object key) throws Exception {
|
|
|
|
if (!(key instanceof String))
|
|
throw new IllegalArgumentException("The object key must be of type string.");
|
|
|
|
// loading class by name
|
|
Class moduleClass = Class.forName((String)key);
|
|
|
|
// instantiating class
|
|
Parser theParser = (Parser) moduleClass.newInstance();
|
|
|
|
// setting logger that should by used
|
|
String parserShortName = ((String)key).substring("de.anomic.plasma.parser.".length(),((String)key).lastIndexOf("."));
|
|
|
|
serverLog theLogger = new serverLog("PARSER." + parserShortName.toUpperCase());
|
|
theParser.setLogger(theLogger);
|
|
|
|
return theParser;
|
|
}
|
|
|
|
/**
|
|
* @see org.apache.commons.pool.PoolableObjectFactory#destroyObject(java.lang.Object)
|
|
*/
|
|
public void destroyObject(Object key, Object obj) {
|
|
/*
|
|
if (obj instanceof Parser) {
|
|
Parser theParser = (Parser) obj;
|
|
}
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* @see org.apache.commons.pool.PoolableObjectFactory#validateObject(java.lang.Object)
|
|
*/
|
|
public boolean validateObject(Object key, Object obj) {
|
|
if (obj instanceof Parser) {
|
|
//Parser theParser = (Parser) obj;
|
|
return true;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @param obj
|
|
*
|
|
*/
|
|
public void activateObject(Object key, Object obj) {
|
|
//log.debug(" activateObject...");
|
|
}
|
|
|
|
/**
|
|
* @param obj
|
|
*
|
|
*/
|
|
public void passivateObject(Object key, Object obj) {
|
|
//log.debug(" passivateObject..." + obj);
|
|
if (obj instanceof Parser) {
|
|
Parser theParser = (Parser) obj;
|
|
theParser.reset();
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
final class plasmaParserPool extends GenericKeyedObjectPool {
|
|
|
|
public plasmaParserPool(plasmaParserFactory objFactory, GenericKeyedObjectPool.Config config) {
|
|
super(objFactory, config);
|
|
}
|
|
|
|
|
|
public Object borrowObject(Object key) throws Exception {
|
|
return super.borrowObject(key);
|
|
}
|
|
|
|
public void returnObject(Object key, Object borrowed) throws Exception {
|
|
super.returnObject(key,borrowed);
|
|
}
|
|
}
|