mirror of
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dafffd0153
git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@6182 6c8d7289-2bf4-0310-a012-ef5d649a1542
256 lines
10 KiB
Java
256 lines
10 KiB
Java
//zipParser.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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//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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package de.anomic.document.parser;
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import java.io.ByteArrayInputStream;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.InputStream;
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import java.io.OutputStreamWriter;
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import java.io.Writer;
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import java.nio.charset.Charset;
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import java.util.Enumeration;
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import java.util.HashSet;
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import java.util.Hashtable;
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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 com.catcode.odf.ODFMetaFileAnalyzer;
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import com.catcode.odf.OpenDocumentMetadata;
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import com.catcode.odf.OpenDocumentTextInputStream;
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import de.anomic.crawler.HTTPLoader;
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import de.anomic.document.AbstractParser;
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import de.anomic.document.Parser;
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import de.anomic.document.ParserException;
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import de.anomic.document.Document;
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import de.anomic.http.httpClient;
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import de.anomic.http.httpHeader;
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import de.anomic.http.httpRequestHeader;
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import de.anomic.kelondro.util.FileUtils;
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import de.anomic.server.serverCharBuffer;
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import de.anomic.yacy.yacyURL;
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public class odtParser 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<String, String> SUPPORTED_MIME_TYPES = new Hashtable<String, String>();
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static {
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SUPPORTED_MIME_TYPES.put("application/vnd.oasis.opendocument.text","odt");
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SUPPORTED_MIME_TYPES.put("application/x-vnd.oasis.opendocument.text","odt");
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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[] {"odf_utils_05_11_29.jar"};
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public odtParser() {
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super(LIBX_DEPENDENCIES);
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this.parserName = "OASIS OpenDocument V2 Text Document Parser";
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}
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public Hashtable<String, String> getSupportedMimeTypes() {
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return SUPPORTED_MIME_TYPES;
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}
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public Document parse(final yacyURL 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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// 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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final long contentSize = zipEntry.getSize();
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// creating a writer for output
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if ((contentSize == -1) || (contentSize > Parser.MAX_KEEP_IN_MEMORY_SIZE)) {
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writerFile = File.createTempFile("odtParser",".prt");
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writer = new OutputStreamWriter(new FileOutputStream(writerFile),"UTF-8");
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} else {
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writer = new serverCharBuffer();
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}
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// extract data
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final InputStream zipFileEntryStream = zipFile.getInputStream(zipEntry);
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final OpenDocumentTextInputStream odStream = new OpenDocumentTextInputStream(zipFileEntryStream);
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FileUtils.copy(odStream, writer, Charset.forName("UTF-8"));
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// close readers and writers
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odStream.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 ODFMetaFileAnalyzer metaAnalyzer = new ODFMetaFileAnalyzer();
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final OpenDocumentMetadata metaData = metaAnalyzer.analyzeMetaData(zipFileEntryStream);
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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 serverCharBuffer) {
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final byte[] contentBytes = ((serverCharBuffer)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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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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} 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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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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}
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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 yacyURL 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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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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public static void main(final String[] args) {
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try {
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if (args.length != 1) return;
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// getting the content URL
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final yacyURL contentUrl = new yacyURL(args[0], null);
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// creating a new parser
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final odtParser testParser = new odtParser();
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// downloading the document content
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final httpRequestHeader reqHeader = new httpRequestHeader();
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reqHeader.put(httpHeader.USER_AGENT, HTTPLoader.crawlerUserAgent);
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final byte[] content = httpClient.wget(contentUrl.toString(), reqHeader, 10000);
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final ByteArrayInputStream input = new ByteArrayInputStream(content);
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// parsing the document
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testParser.parse(contentUrl, "application/vnd.oasis.opendocument.text", null, input);
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} catch (final Exception e) {
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e.printStackTrace();
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}
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}
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}
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