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https://github.com/yacy/yacy_search_server.git
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788288eb9e
The default schema uses only some of them and the resting search index has now the following properties: - webgraph size will have about 40 times as much entries as default index - the complete index size will increase and may be about the double size of current amount As testing showed, not much indexing performance is lost. The default index will be smaller (moved fields out of it); thus searching can be faster. The new index will cause that some old parts in YaCy can be removed, i.e. specialized webgraph data and the noload crawler. The new index will make it possible to: - search within link texts of linked but not indexed documents (about 20 times of document index in size!!) - get a very detailed link graph - enhance ranking using a complete link graph To get the full access to the new index, the API to solr has now two access points: one with attribute core=collection1 for the default search index and core=webgraph to the new webgraph search index. This is also avaiable for p2p operation but client access is not yet implemented.
126 lines
4.9 KiB
Java
126 lines
4.9 KiB
Java
/**
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* tarParser
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* Copyright 2010 by Michael Peter Christen, mc@yacy.net, Frankfurt am Main, Germany
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* First released 29.6.2010 at http://yacy.net
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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 library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.yacy.document.parser;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.RandomAccessFile;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.zip.GZIPInputStream;
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import net.yacy.cora.document.UTF8;
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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.TextParser;
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import net.yacy.kelondro.data.meta.DigestURI;
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import net.yacy.kelondro.util.FileUtils;
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import org.apache.tools.tar.TarEntry;
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import org.apache.tools.tar.TarInputStream;
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// this is a new implementation of this parser idiom using multiple documents as result set
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public class tarParser extends AbstractParser implements Parser {
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private final static String MAGIC = "ustar"; // A magic for a tar archive, may appear at #101h-#105
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public tarParser() {
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super("Tape Archive File Parser");
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this.SUPPORTED_EXTENSIONS.add("tar");
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this.SUPPORTED_MIME_TYPES.add("application/x-tar");
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this.SUPPORTED_MIME_TYPES.add("application/tar");
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this.SUPPORTED_MIME_TYPES.add("applicaton/x-gtar");
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this.SUPPORTED_MIME_TYPES.add("multipart/x-tar");
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}
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@Override
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public Document[] parse(final DigestURI url, final String mimeType, final String charset, InputStream source) throws Parser.Failure, InterruptedException {
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final List<Document> docacc = new ArrayList<Document>();
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Document[] subDocs = null;
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final String ext = url.getFileExtension().toLowerCase();
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if (ext.equals("gz") || ext.equals("tgz")) {
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try {
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source = new GZIPInputStream(source);
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} catch (final IOException e) {
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throw new Parser.Failure("tar parser: " + e.getMessage(), url);
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}
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}
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TarEntry entry;
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final TarInputStream tis = new TarInputStream(source);
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File tmp = null;
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// loop through the elements in the tar file and parse every single file inside
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while (true) {
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try {
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if (tis.available() <= 0) break;
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entry = tis.getNextEntry();
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if (entry == null) break;
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if (entry.isDirectory() || entry.getSize() <= 0) continue;
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final String name = entry.getName();
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final int idx = name.lastIndexOf('.');
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final String mime = TextParser.mimeOf((idx > -1) ? name.substring(idx+1) : "");
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try {
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tmp = FileUtils.createTempFile(this.getClass(), name);
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FileUtils.copy(tis, tmp, entry.getSize());
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subDocs = TextParser.parseSource(DigestURI.newURL(url, "#" + name), mime, null, tmp);
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if (subDocs == null) continue;
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for (final Document d: subDocs) docacc.add(d);
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} catch (final Parser.Failure e) {
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AbstractParser.log.logWarning("tar parser entry " + name + ": " + e.getMessage());
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} finally {
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if (tmp != null) FileUtils.deletedelete(tmp);
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}
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} catch (final IOException e) {
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AbstractParser.log.logWarning("tar parser:" + e.getMessage());
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break;
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}
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}
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return docacc.toArray(new Document[docacc.size()]);
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}
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public final static boolean isTar(File f) {
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if (!f.exists() || f.length() < 0x105) return false;
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RandomAccessFile raf = null;
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try {
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raf = new RandomAccessFile(f, "r");
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raf.seek(0x101);
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byte[] b = new byte[5];
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raf.read(b);
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return MAGIC.equals(UTF8.String(b));
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} catch (FileNotFoundException e) {
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return false;
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} catch (IOException e) {
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return false;
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} finally {
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if (raf != null) try {raf.close();} catch (IOException e) {}
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}
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}
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}
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