mirror of
https://github.com/yacy/yacy_search_server.git
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11639aef35
- it is now possible to crawl the local file system with an intranet peer - redesign of URL handling - refactoring: created LGPLed package cora: 'content retrieval api' which may be used externally by other applications without yacy core elements because it has no dependencies to other parts of yacy git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@6902 6c8d7289-2bf4-0310-a012-ef5d649a1542
259 lines
11 KiB
Java
259 lines
11 KiB
Java
//odtParser.java
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//------------------------
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//part of YaCy
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//(C) by Michael Peter Christen; mc@yacy.net
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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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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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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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package net.yacy.document.parser;
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import java.io.File;
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import java.io.InputStream;
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import java.io.Writer;
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import java.util.Enumeration;
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import java.util.HashSet;
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import java.util.Set;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipFile;
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import javax.xml.parsers.SAXParser;
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import javax.xml.parsers.SAXParserFactory;
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import net.yacy.cora.document.MultiProtocolURI;
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import net.yacy.document.AbstractParser;
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import net.yacy.document.Document;
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import net.yacy.document.Idiom;
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import net.yacy.document.ParserException;
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import net.yacy.document.parser.xml.ODContentHandler;
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import net.yacy.document.parser.xml.ODMetaHandler;
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import net.yacy.kelondro.io.CharBuffer;
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import net.yacy.kelondro.util.FileUtils;
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public class odtParser extends AbstractParser implements Idiom {
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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 Set<String> SUPPORTED_MIME_TYPES = new HashSet<String>();
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public static final Set<String> SUPPORTED_EXTENSIONS = new HashSet<String>();
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static {
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SUPPORTED_EXTENSIONS.add("odt");
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SUPPORTED_EXTENSIONS.add("ods");
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SUPPORTED_EXTENSIONS.add("odp");
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SUPPORTED_EXTENSIONS.add("odg");
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SUPPORTED_EXTENSIONS.add("odc");
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SUPPORTED_EXTENSIONS.add("odf");
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SUPPORTED_EXTENSIONS.add("odb");
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SUPPORTED_EXTENSIONS.add("odi");
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SUPPORTED_EXTENSIONS.add("odm");
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SUPPORTED_EXTENSIONS.add("ott");
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SUPPORTED_EXTENSIONS.add("ots");
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SUPPORTED_EXTENSIONS.add("otp");
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SUPPORTED_EXTENSIONS.add("otg");
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SUPPORTED_EXTENSIONS.add("sxw"); // Star Office Writer file format
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SUPPORTED_EXTENSIONS.add("sxc"); // Star Office Calc file format
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SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.text");
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SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.spreadsheet");
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SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.presentation");
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SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.graphics");
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SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.chart");
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SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.formula");
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SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.database");
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SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.image");
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SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.text-master");
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SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.text-template");
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SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.spreadsheet-template");
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SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.presentation-template");
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SUPPORTED_MIME_TYPES.add("application/vnd.oasis.opendocument.graphics-template");
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SUPPORTED_MIME_TYPES.add("application/x-vnd.oasis.opendocument.text");
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SUPPORTED_MIME_TYPES.add("application/OOo-calc");
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SUPPORTED_MIME_TYPES.add("application/OOo-writer");
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}
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public odtParser() {
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super("OASIS OpenDocument V2 Text Document Parser");
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}
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public Set<String> supportedMimeTypes() {
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return SUPPORTED_MIME_TYPES;
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}
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public Set<String> supportedExtensions() {
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return SUPPORTED_EXTENSIONS;
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}
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@Override
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public Document parse(final MultiProtocolURI location, final String mimeType, final String charset, final File dest) throws ParserException, InterruptedException {
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Writer writer = null;
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File writerFile = null;
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try {
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String docDescription = null;
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String docKeywordStr = null;
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String docShortTitle = null;
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String docLongTitle = null;
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String docAuthor = null;
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String docLanguage = null;
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// opening the file as zip file
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final ZipFile zipFile= new ZipFile(dest);
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final Enumeration<? extends ZipEntry> zipEnum = zipFile.entries();
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final SAXParserFactory saxParserFactory = SAXParserFactory.newInstance();
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// looping through all containing files
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while (zipEnum.hasMoreElements()) {
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// check for interruption
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checkInterruption();
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// getting the next zip file entry
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final ZipEntry zipEntry= zipEnum.nextElement();
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final String entryName = zipEntry.getName();
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// content.xml contains the document content in xml format
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if (entryName.equals("content.xml")) {
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// create a writer for output
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writer = new CharBuffer();
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// extract data
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final InputStream zipFileEntryStream = zipFile.getInputStream(zipEntry);
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final SAXParser saxParser = saxParserFactory.newSAXParser();
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saxParser.parse(zipFileEntryStream, new ODContentHandler(writer));
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// close readers and writers
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zipFileEntryStream.close();
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writer.close();
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} else if (entryName.equals("meta.xml")) {
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// meta.xml contains metadata about the document
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final InputStream zipFileEntryStream = zipFile.getInputStream(zipEntry);
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final SAXParser saxParser = saxParserFactory.newSAXParser();
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final ODMetaHandler metaData = new ODMetaHandler();
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saxParser.parse(zipFileEntryStream, metaData);
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docDescription = metaData.getDescription();
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docKeywordStr = metaData.getKeyword();
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docShortTitle = metaData.getTitle();
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docLongTitle = metaData.getSubject();
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docAuthor = metaData.getCreator();
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docLanguage = metaData.getLanguage();
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}
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}
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// make the languages set
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Set<String> languages = new HashSet<String>(1);
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if (docLanguage != null) languages.add(docLanguage);
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// if there is no title availabe we generate one
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if (docLongTitle == null) {
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if (docShortTitle != null) {
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docLongTitle = docShortTitle;
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}
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}
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// split the keywords
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String[] docKeywords = null;
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if (docKeywordStr != null) docKeywords = docKeywordStr.split(" |,");
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// create the parser document
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Document theDoc = null;
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if (writer instanceof CharBuffer) {
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final byte[] contentBytes = ((CharBuffer)writer).toString().getBytes("UTF-8");
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theDoc = new Document(
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location,
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mimeType,
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"UTF-8",
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languages,
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docKeywords,
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docLongTitle,
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docAuthor,
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"",
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null,
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docDescription,
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contentBytes,
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null,
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null,
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false);
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} else {
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theDoc = new Document(
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location,
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mimeType,
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"UTF-8",
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languages,
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docKeywords,
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docLongTitle,
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docAuthor,
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"",
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null,
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docDescription,
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writerFile,
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null,
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null,
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false);
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}
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return theDoc;
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} catch (final Exception e) {
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if (e instanceof InterruptedException) throw (InterruptedException) e;
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if (e instanceof ParserException) throw (ParserException) e;
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// close the writer
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if (writer != null) try { writer.close(); } catch (final Exception ex) {/* ignore this */}
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// delete the file
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if (writerFile != null) FileUtils.deletedelete(writerFile);
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throw new ParserException("Unexpected error while parsing odt file. " + e.getMessage(),location);
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}
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}
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public Document parse(final MultiProtocolURI location, final String mimeType, final String charset, final InputStream source) throws ParserException, InterruptedException {
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File dest = null;
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try {
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// creating a tempfile
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dest = File.createTempFile("OpenDocument", ".odt");
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dest.deleteOnExit();
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// copying the stream into a file
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FileUtils.copy(source, dest);
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// parsing the content
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return parse(location, mimeType, charset, dest);
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} catch (final Exception e) {
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if (e instanceof InterruptedException) throw (InterruptedException) e;
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if (e instanceof ParserException) throw (ParserException) e;
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throw new ParserException("Unexpected error while parsing odt file. " + e.getMessage(),location);
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} finally {
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if (dest != null) FileUtils.deletedelete(dest);
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}
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}
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@Override
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public void reset() {
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// Nothing todo here at the moment
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super.reset();
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}
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}
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