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//odtParser.java
//------------------------
//part of YaCy
//(C) by Michael Peter Christen; mc@yacy.net
//first published on http://www.anomic.de
//Frankfurt, Germany, 2005
//
//this file is contributed by Martin Thelian
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
//This program is free software; you can redistribute it and/or modify
//it under the terms of the GNU General Public License as published by
//the Free Software Foundation; either version 2 of the License, or
//(at your option) any later version.
//
//This program is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//GNU General Public License for more details.
//
//You should have received a copy of the GNU General Public License
//along with this program; if not, write to the Free Software
//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
package net.yacy.document.parser;
import java.io.File;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Date;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import net.yacy.cora.document.encoding.UTF8;
import net.yacy.cora.document.id.AnchorURL;
import net.yacy.cora.document.id.DigestURL;
import net.yacy.cora.util.ConcurrentLog;
import net.yacy.document.AbstractParser;
import net.yacy.document.Document;
import net.yacy.document.Parser;
import net.yacy.document.VocabularyScraper;
import net.yacy.document.parser.xml.ODContentHandler;
import net.yacy.document.parser.xml.ODMetaHandler;
import net.yacy.document.parser.xml.OOXMLSharedStringsHandler;
import net.yacy.document.parser.xml.OOXMLSpreeadsheetHandler;
import net.yacy.kelondro.io.CharBuffer;
import net.yacy.kelondro.util.FileUtils;
import org.xml.sax.SAXException;
public class ooxmlParser extends AbstractParser implements Parser {
public ooxmlParser() {
super("Open Office XML Document Parser");
this.SUPPORTED_EXTENSIONS.add("docx");
this.SUPPORTED_MIME_TYPES.add("application/vnd.openxmlformats-officedocument.wordprocessingml.document");
this.SUPPORTED_EXTENSIONS.add("dotx");
this.SUPPORTED_MIME_TYPES.add("application/vnd.openxmlformats-officedocument.wordprocessingml.template");
this.SUPPORTED_EXTENSIONS.add("potx");
this.SUPPORTED_MIME_TYPES.add("application/vnd.openxmlformats-officedocument.presentationml.template");
this.SUPPORTED_EXTENSIONS.add("ppsx");
this.SUPPORTED_MIME_TYPES.add("application/vnd.openxmlformats-officedocument.presentationml.slideshow");
this.SUPPORTED_EXTENSIONS.add("pptx");
this.SUPPORTED_MIME_TYPES.add("application/vnd.openxmlformats-officedocument.presentationml.presentation");
this.SUPPORTED_EXTENSIONS.add("xlsx");
this.SUPPORTED_MIME_TYPES.add("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
this.SUPPORTED_EXTENSIONS.add("xltx");
this.SUPPORTED_MIME_TYPES.add("application/vnd.openxmlformats-officedocument.spreadsheetml.template");
}
private static final ThreadLocal<SAXParser> tlSax = new ThreadLocal<SAXParser>();
private static SAXParser getParser() throws SAXException {
SAXParser parser = tlSax.get();
if (parser == null) {
try {
parser = SAXParserFactory.newInstance().newSAXParser();
} catch (final ParserConfigurationException e) {
throw new SAXException(e.getMessage(), e);
}
tlSax.set(parser);
}
return parser;
}
private Document[] parse(final DigestURL location, final String mimeType, @SuppressWarnings("unused") final String charset, final File dest) throws Parser.Failure, InterruptedException {
CharBuffer writer = null;
try {
String docDescription = null;
String docKeywordStr = null;
String docShortTitle = null;
String docLongTitle = null;
String docAuthor = null;
String docLanguage = null;
Date docModified = null;
// opening the file as zip file
final ZipFile zipFile= new ZipFile(dest);
final Enumeration<? extends ZipEntry> zipEnum = zipFile.entries();
final Set<AnchorURL> detectedURLs = new HashSet<>();
/* Handle first any eventual spreadsheet shared strings table
* As stated by the standard : "A package shall contain exactly one Shared String Table part," */
final ZipEntry sharedStringsEntry = zipFile.getEntry(OOXMLSharedStringsHandler.ENTRY_NAME);
final List<String> sharedStrings = new ArrayList<>();
if (sharedStringsEntry != null) {
// extract data
try (final InputStream zipFileEntryStream = zipFile.getInputStream(sharedStringsEntry)) {
final SAXParser saxParser = getParser();
saxParser.parse(zipFileEntryStream, new OOXMLSharedStringsHandler(sharedStrings));
}
}
// looping through all containing files
while (zipEnum.hasMoreElements()) {
// get next zip file entry
final ZipEntry zipEntry= zipEnum.nextElement();
final String entryName = zipEntry.getName();
if(entryName.startsWith("xl/worksheets/sheet")) {
if(writer == null) {
// create a writer for output
writer = new CharBuffer(odtParser.MAX_DOCSIZE, (int) zipEntry.getSize());
}
// extract data
final InputStream zipFileEntryStream = zipFile.getInputStream(zipEntry);
try {
final SAXParser saxParser = getParser();
saxParser.parse(zipFileEntryStream, new OOXMLSpreeadsheetHandler(sharedStrings, writer, detectedURLs));
// close readers and writers
} finally {
zipFileEntryStream.close();
}
} else if (entryName.equals("word/document.xml")
|| entryName.startsWith("ppt/slides/slide")) {
if(writer == null) {
// create a writer for output
writer = new CharBuffer(odtParser.MAX_DOCSIZE, (int) zipEntry.getSize());
}
// extract data
final InputStream zipFileEntryStream = zipFile.getInputStream(zipEntry);
try {
final SAXParser saxParser = getParser();
saxParser.parse(zipFileEntryStream, new ODContentHandler(writer));
// close readers and writers
} finally {
zipFileEntryStream.close();
}
} else if (entryName.equals("docProps/core.xml")) {
// meta.xml contains metadata about the document
final InputStream zipFileEntryStream = zipFile.getInputStream(zipEntry);
final SAXParser saxParser = getParser();
final ODMetaHandler metaData = new ODMetaHandler();
saxParser.parse(zipFileEntryStream, metaData);
docDescription = metaData.getDescription();
docKeywordStr = metaData.getKeyword();
docShortTitle = metaData.getTitle();
docLongTitle = metaData.getSubject();
docAuthor = metaData.getCreator();
docLanguage = metaData.getLanguage();
docModified = metaData.getLastModified();
}
}
zipFile.close(); // close zipfile (so underlaying file (temp file) can be deleted later
// make the languages set
final Set<String> languages = new HashSet<String>(1);
if (docLanguage != null && docLanguage.isEmpty())
languages.add(docLanguage);
// if there is no title availabe we generate one
if ((docLongTitle == null || docLongTitle.isEmpty()) && (docShortTitle != null)) {
docLongTitle = docShortTitle;
}
// split the keywords
String[] docKeywords = null;
if (docKeywordStr != null) docKeywords = docKeywordStr.split(" |,");
// create the parser document
Document[] docs = null;
final byte[] contentBytes = (writer == null) ? null : UTF8.getBytes(writer.toString());
List<String> descriptions = new ArrayList<String>();
if (docDescription != null && docDescription.length() > 0) descriptions.add(docDescription);
docs = new Document[]{new Document(
location,
mimeType,
StandardCharsets.UTF_8.name(),
this,
languages,
docKeywords,
singleList(docLongTitle),
docAuthor,
null,
null,
descriptions,
0.0d, 0.0d,
contentBytes,
detectedURLs,
null,
null,
false,
docModified)};
return docs;
} catch (final Exception e) {
if (e instanceof InterruptedException) throw (InterruptedException) e;
if (e instanceof Parser.Failure) throw (Parser.Failure) e;
// close the writer
if (writer != null) try {
writer.close();
} catch (final Exception ex) {/* ignore this */}
ConcurrentLog.logException(e);
throw new Parser.Failure("Unexpected error while parsing odt file. " + e.getMessage(),location);
}
}
@Override
public Document[] parse(
final DigestURL location,
final String mimeType,
final String charset,
final VocabularyScraper scraper,
final int timezoneOffset,
final InputStream source) throws Parser.Failure, InterruptedException {
File dest = null;
try {
// creating a tempfile
dest = File.createTempFile("OpenDocument", ".odt");
// copying the stream into a file
FileUtils.copy(source, dest);
// parsing the content
return parse(location, mimeType, charset, dest);
} catch (final Exception e) {
if (e instanceof InterruptedException) throw (InterruptedException) e;
if (e instanceof Parser.Failure) throw (Parser.Failure) e;
throw new Parser.Failure("Unexpected error while parsing odt file. " + e.getMessage(),location);
} finally {
if (dest != null) FileUtils.deletedelete(dest);
}
}
}
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