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263 lines
11 KiB
263 lines
11 KiB
//zipParser.java
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//------------------------
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//part of YaCy
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//(C) by Michael Peter Christen; mc@anomic.de
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//first published on http://www.anomic.de
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//Frankfurt, Germany, 2005
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//
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//this file is contributed by Martin Thelian
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//last major change: 16.05.2005
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//
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//This program is free software; you can redistribute it and/or modify
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//it under the terms of the GNU General Public License as published by
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//the Free Software Foundation; either version 2 of the License, or
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//(at your option) any later version.
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//
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//This program is distributed in the hope that it will be useful,
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//but WITHOUT ANY WARRANTY; without even the implied warranty of
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//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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//GNU General Public License for more details.
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//
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//You should have received a copy of the GNU General Public License
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//along with this program; if not, write to the Free Software
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//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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//Using this software in any meaning (reading, learning, copying, compiling,
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//running) means that you agree that the Author(s) is (are) not responsible
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//for cost, loss of data or any harm that may be caused directly or indirectly
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//by usage of this softare or this documentation. The usage of this software
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//is on your own risk. The installation and usage (starting/running) of this
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//software may allow other people or application to access your computer and
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//any attached devices and is highly dependent on the configuration of the
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//software which must be done by the user of the software; the author(s) is
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//(are) also not responsible for proper configuration and usage of the
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//software, even if provoked by documentation provided together with
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//the software.
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//
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//Any changes to this file according to the GPL as documented in the file
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//gpl.txt aside this file in the shipment you received can be done to the
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//lines that follows this copyright notice here, but changes must not be
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//done inside the copyright notive above. A re-distribution must contain
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//the intact and unchanged copyright notice.
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//Contributions and changes to the program code must be marked as such.
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package de.anomic.plasma.parser.odt;
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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.util.Enumeration;
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import java.util.Hashtable;
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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.http.httpc;
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import de.anomic.net.URL;
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import de.anomic.plasma.plasmaParserDocument;
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import de.anomic.plasma.parser.AbstractParser;
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import de.anomic.plasma.parser.Parser;
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import de.anomic.plasma.parser.ParserException;
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import de.anomic.server.serverCharBuffer;
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import de.anomic.server.serverFileUtils;
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import de.anomic.server.logging.serverLog;
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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 SUPPORTED_MIME_TYPES = new Hashtable();
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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 getSupportedMimeTypes() {
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return SUPPORTED_MIME_TYPES;
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}
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public plasmaParserDocument parse(URL location, String mimeType, String charset, 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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// opening the file as zip file
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ZipFile zipFile= new ZipFile(dest);
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Enumeration 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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ZipEntry zipEntry= (ZipEntry) zipEnum.nextElement();
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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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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",".tmp");
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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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InputStream zipFileEntryStream = zipFile.getInputStream(zipEntry);
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OpenDocumentTextInputStream odStream = new OpenDocumentTextInputStream(zipFileEntryStream);
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serverFileUtils.copy(odStream, writer, "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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InputStream zipFileEntryStream = zipFile.getInputStream(zipEntry);
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ODFMetaFileAnalyzer metaAnalyzer = new ODFMetaFileAnalyzer();
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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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}
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}
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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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plasmaParserDocument theDoc = null;
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if (writer instanceof serverCharBuffer) {
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byte[] contentBytes = ((serverCharBuffer)writer).toString().getBytes("UTF-8");
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theDoc = new plasmaParserDocument(
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location,
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mimeType,
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"UTF-8",
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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 plasmaParserDocument(
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location,
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mimeType,
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"UTF-8",
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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 (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 (Exception ex) {/* ignore this */}
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// delete the file
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if (writerFile != null) try { writerFile.delete(); } catch (Exception ex) {/* ignore this */}
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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 plasmaParserDocument parse(URL location, String mimeType, String charset, 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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serverFileUtils.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 (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) try { dest.delete(); } catch (Exception e){/* ignore this */}
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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(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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URL contentUrl = new URL(args[0]);
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// creating a new parser
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odtParser testParser = new odtParser();
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// setting the parser logger
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testParser.setLogger(new serverLog("PARSER.ODT"));
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// downloading the document content
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byte[] content = httpc.singleGET(contentUrl, contentUrl.getHost(), 10000, null, null, null, null);
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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 (Exception e) {
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e.printStackTrace();
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}
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}
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}
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