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https://github.com/yacy/yacy_search_server.git
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b6fb239e74
some file types are containers for several files. These containers had been parsed in such a way that the set of resulting parsed content was merged into one single document before parsing. Using this parser infrastructure it is not possible to parse document containers that contain individual files. An example is a rss file where the rss messages can be treated as individual documents with their own url reference. Another example is a surrogate file which was treated with a special operation outside of the parser infrastructure. This commit introduces a redesigned parser interface and a new abstract parser implementation. The new parser interface has now only one entry point and returns always a set of parsed documents. In case of single documents the parser method returns a set of one documents. To be compliant with the new interface, the zip and tar parser had been also completely redesigned. All parsers are now much more simple and cleaner in its structure. The switchboard operations had been extended to operate with sets of parsed files, not single parsed files. additionally, parsing of jar manifest files had been added. git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@6955 6c8d7289-2bf4-0310-a012-ef5d649a1542
208 lines
9.2 KiB
Java
208 lines
9.2 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.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.Parser;
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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 Parser {
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public odtParser() {
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super("OASIS OpenDocument V2 Text Document Parser");
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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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private Document[] parse(final MultiProtocolURI location, final String mimeType, final String charset, final File dest) throws Parser.Failure, InterruptedException {
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CharBuffer writer = 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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// 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[] docs = null;
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final byte[] contentBytes = writer.toString().getBytes("UTF-8");
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docs = new Document[]{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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return docs;
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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 Parser.Failure) throw (Parser.Failure) 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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throw new Parser.Failure("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 Parser.Failure, 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 Parser.Failure) throw (Parser.Failure) e;
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throw new Parser.Failure("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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}
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