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686 lines
28 KiB
686 lines
28 KiB
// indexRepositoryReference.java
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// (C) 2006 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
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// first published 2006 as part of 'plasmaCrawlLURL.java' on http://yacy.net
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//
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// This is a part of YaCy, a peer-to-peer based web search engine
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//
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// $LastChangedDate: 2006-04-02 22:40:07 +0200 (So, 02 Apr 2006) $
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// $LastChangedRevision: 1986 $
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// $LastChangedBy: orbiter $
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//
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// LICENSE
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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.kelondro.text;
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import java.io.BufferedOutputStream;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.TreeSet;
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import net.yacy.kelondro.index.Cache;
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import net.yacy.kelondro.index.HandleSet;
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import net.yacy.kelondro.index.ObjectIndex;
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import net.yacy.kelondro.index.Row;
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import net.yacy.kelondro.logging.Log;
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import net.yacy.kelondro.order.CloneableIterator;
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import net.yacy.kelondro.table.SplitTable;
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import net.yacy.kelondro.util.ScoreCluster;
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import de.anomic.data.Blacklist;
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import de.anomic.document.parser.html.CharacterCoding;
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import de.anomic.http.client.Client;
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import de.anomic.http.client.RemoteProxyConfig;
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import de.anomic.http.metadata.ResponseContainer;
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import de.anomic.kelondro.text.metadataPrototype.URLMetadataRow;
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import de.anomic.kelondro.text.referencePrototype.WordReference;
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import de.anomic.yacy.yacyURL;
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public final class MetadataRepository implements Iterable<byte[]> {
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// class objects
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protected ObjectIndex urlIndexFile;
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private Export exportthread; // will have a export thread assigned if exporter is running
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private File location;
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private ArrayList<hostStat> statsDump;
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public MetadataRepository(
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final File path,
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final boolean useTailCache,
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final boolean exceed134217727) {
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this(path, "urls", useTailCache, exceed134217727);
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}
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public MetadataRepository(
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final File path,
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final String tablename,
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final boolean useTailCache,
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final boolean exceed134217727) {
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this.location = path;
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this.urlIndexFile = new Cache(new SplitTable(this.location, tablename, URLMetadataRow.rowdef, useTailCache, exceed134217727));
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this.exportthread = null; // will have a export thread assigned if exporter is running
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this.statsDump = null;
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}
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public void clearCache() {
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if (urlIndexFile instanceof Cache) ((Cache) urlIndexFile).clearCache();
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statsDump = null;
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}
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public void clear() throws IOException {
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if (exportthread != null) exportthread.interrupt();
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urlIndexFile.clear();
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statsDump = null;
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}
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public int size() {
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return urlIndexFile.size();
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}
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public void close() {
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statsDump = null;
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if (urlIndexFile != null) {
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urlIndexFile.close();
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urlIndexFile = null;
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}
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}
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public synchronized int writeCacheSize() {
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if (urlIndexFile instanceof SplitTable) return ((SplitTable) urlIndexFile).writeBufferSize();
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if (urlIndexFile instanceof Cache) return ((Cache) urlIndexFile).writeBufferSize();
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return 0;
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}
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public synchronized URLMetadataRow load(final String urlHash, final WordReference searchedWord, final long ranking) {
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// generates an plasmaLURLEntry using the url hash
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// if the url cannot be found, this returns null
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if (urlHash == null) return null;
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assert urlIndexFile != null;
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try {
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final Row.Entry entry = urlIndexFile.get(urlHash.getBytes());
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if (entry == null) return null;
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return new URLMetadataRow(entry, searchedWord, ranking);
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} catch (final IOException e) {
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return null;
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}
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}
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public synchronized void store(final URLMetadataRow entry) throws IOException {
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// Check if there is a more recent Entry already in the DB
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URLMetadataRow oldEntry;
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try {
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Row.Entry oe = (urlIndexFile == null) ? null : urlIndexFile.get(entry.hash().getBytes());
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oldEntry = (oe == null) ? null : new URLMetadataRow(oe, null, 0);
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} catch (final Exception e) {
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e.printStackTrace();
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oldEntry = null;
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}
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if (oldEntry != null && entry.isOlder(oldEntry)) {
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// the fetched oldEntry is better, so return its properties instead of the new ones
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// this.urlHash = oldEntry.urlHash; // unnecessary, should be the same
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// this.url = oldEntry.url; // unnecessary, should be the same
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// doesn't make sense, since no return value:
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//entry = oldEntry;
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return; // this did not need to be stored, but is updated
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}
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urlIndexFile.put(entry.toRowEntry());
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statsDump = null;
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}
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public synchronized boolean remove(final String urlHash) {
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if (urlHash == null) return false;
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try {
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final Row.Entry r = urlIndexFile.remove(urlHash.getBytes());
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if (r != null) statsDump = null;
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return r != null;
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} catch (final IOException e) {
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return false;
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}
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}
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public boolean exists(final String urlHash) {
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if (urlIndexFile == null) return false; // case may happen during shutdown
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return urlIndexFile.has(urlHash.getBytes());
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}
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public CloneableIterator<byte[]> keys(boolean up, byte[] firstKey) {
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try {
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return this.urlIndexFile.keys(up, firstKey);
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} catch (IOException e) {
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e.printStackTrace();
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return null;
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}
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}
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public Iterator<byte[]> iterator() {
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return keys(true, null);
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}
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public CloneableIterator<URLMetadataRow> entries() throws IOException {
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// enumerates entry elements
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return new kiter();
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}
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public CloneableIterator<URLMetadataRow> entries(final boolean up, final String firstHash) throws IOException {
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// enumerates entry elements
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return new kiter(up, firstHash);
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}
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public class kiter implements CloneableIterator<URLMetadataRow> {
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// enumerates entry elements
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private final Iterator<Row.Entry> iter;
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private final boolean error;
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boolean up;
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public kiter() throws IOException {
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this.up = true;
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this.iter = urlIndexFile.rows();
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this.error = false;
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}
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public kiter(final boolean up, final String firstHash) throws IOException {
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this.up = up;
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this.iter = urlIndexFile.rows(up, (firstHash == null) ? null : firstHash.getBytes());
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this.error = false;
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}
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public kiter clone(final Object secondHash) {
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try {
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return new kiter(up, (String) secondHash);
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} catch (final IOException e) {
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return null;
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}
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}
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public final boolean hasNext() {
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if (this.error) return false;
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if (this.iter == null) return false;
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return this.iter.hasNext();
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}
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public final URLMetadataRow next() {
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Row.Entry e = null;
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if (this.iter == null) { return null; }
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if (this.iter.hasNext()) { e = this.iter.next(); }
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if (e == null) { return null; }
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return new URLMetadataRow(e, null, 0);
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}
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public final void remove() {
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this.iter.remove();
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}
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}
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/**
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* Uses an Iteration over urlHash.db to detect malformed URL-Entries.
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* Damaged URL-Entries will be marked in a HashSet and removed at the end of the function.
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*
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* @param proxyConfig
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*/
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public void deadlinkCleaner(final RemoteProxyConfig proxyConfig) {
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final Log log = new Log("URLDBCLEANUP");
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final HashSet<String> damagedURLS = new HashSet<String>();
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try {
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final Iterator<URLMetadataRow> eiter = entries(true, null);
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int iteratorCount = 0;
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while (eiter.hasNext()) try {
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eiter.next();
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iteratorCount++;
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} catch (final RuntimeException e) {
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if(e.getMessage() != null) {
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final String m = e.getMessage();
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damagedURLS.add(m.substring(m.length() - 12));
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} else {
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log.logSevere("RuntimeException:", e);
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}
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}
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log.logInfo("URLs vorher: " + urlIndexFile.size() + " Entries loaded during Iteratorloop: " + iteratorCount + " kaputte URLs: " + damagedURLS.size());
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final Iterator<String> eiter2 = damagedURLS.iterator();
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String urlHash;
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while (eiter2.hasNext()) {
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urlHash = eiter2.next();
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// trying to fix the invalid URL
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String oldUrlStr = null;
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try {
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// getting the url data as byte array
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final Row.Entry entry = urlIndexFile.get(urlHash.getBytes());
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// getting the wrong url string
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oldUrlStr = entry.getColString(1, null).trim();
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int pos = -1;
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if ((pos = oldUrlStr.indexOf("://")) != -1) {
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// trying to correct the url
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final String newUrlStr = "http://" + oldUrlStr.substring(pos + 3);
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final yacyURL newUrl = new yacyURL(newUrlStr, null);
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// doing a http head request to test if the url is correct
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final Client client = new Client(10000);
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client.setProxy(proxyConfig);
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ResponseContainer res = null;
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try {
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res = client.HEAD(newUrl.toString());
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} finally {
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if(res != null) {
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// release connection
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res.closeStream();
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}
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}
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if (res != null && res.getStatusCode() == 200) {
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entry.setCol(1, newUrl.toString().getBytes());
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urlIndexFile.put(entry);
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log.logInfo("UrlDB-Entry with urlHash '" + urlHash + "' corrected\n\tURL: " + oldUrlStr + " -> " + newUrlStr);
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} else {
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remove(urlHash);
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log.logInfo("UrlDB-Entry with urlHash '" + urlHash + "' removed\n\tURL: " + oldUrlStr + "\n\tConnection Status: " + (res == null ? "null" : res.getStatusLine()));
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}
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}
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} catch (final Exception e) {
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remove(urlHash);
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log.logInfo("UrlDB-Entry with urlHash '" + urlHash + "' removed\n\tURL: " + oldUrlStr + "\n\tExecption: " + e.getMessage());
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}
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}
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log.logInfo("URLs nachher: " + size() + " kaputte URLs: " + damagedURLS.size());
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} catch (final IOException e) {
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log.logSevere("IOException", e);
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}
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}
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public BlacklistCleaner getBlacklistCleaner(final Blacklist blacklist) {
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return new BlacklistCleaner(blacklist);
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}
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public class BlacklistCleaner extends Thread {
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private boolean run = true;
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private boolean pause;
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public int blacklistedUrls = 0;
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public int totalSearchedUrls = 1;
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public String lastBlacklistedUrl = "";
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public String lastBlacklistedHash = "";
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public String lastUrl = "";
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public String lastHash = "";
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private final Blacklist blacklist;
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public BlacklistCleaner(final Blacklist blacklist) {
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this.blacklist = blacklist;
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}
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public void run() {
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try {
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Log.logInfo("URLDBCLEANER", "UrldbCleaner-Thread startet");
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final Iterator<URLMetadataRow> eiter = entries(true, null);
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while (eiter.hasNext() && run) {
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synchronized (this) {
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if (this.pause) {
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try {
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this.wait();
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} catch (final InterruptedException e) {
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Log.logWarning("URLDBCLEANER", "InterruptedException", e);
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this.run = false;
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return;
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}
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}
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}
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final URLMetadataRow entry = eiter.next();
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if (entry == null) {
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if (Log.isFine("URLDBCLEANER")) Log.logFine("URLDBCLEANER", "entry == null");
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} else if (entry.hash() == null) {
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if (Log.isFine("URLDBCLEANER")) Log.logFine("URLDBCLEANER", ++blacklistedUrls + " blacklisted (" + ((double) blacklistedUrls / totalSearchedUrls) * 100 + "%): " + "hash == null");
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} else {
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final URLMetadataRow.Components metadata = entry.metadata();
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totalSearchedUrls++;
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if (metadata.url() == null) {
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if (Log.isFine("URLDBCLEANER")) Log.logFine("URLDBCLEANER", ++blacklistedUrls + " blacklisted (" + ((double) blacklistedUrls / totalSearchedUrls) * 100 + "%): " + entry.hash() + "URL == null");
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remove(entry.hash());
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} else if (blacklist.isListed(Blacklist.BLACKLIST_CRAWLER, metadata.url()) ||
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blacklist.isListed(Blacklist.BLACKLIST_DHT, metadata.url())) {
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lastBlacklistedUrl = metadata.url().toNormalform(true, true);
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lastBlacklistedHash = entry.hash();
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if (Log.isFine("URLDBCLEANER")) Log.logFine("URLDBCLEANER", ++blacklistedUrls + " blacklisted (" + ((double) blacklistedUrls / totalSearchedUrls) * 100 + "%): " + entry.hash() + " " + metadata.url().toNormalform(false, true));
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remove(entry.hash());
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if (blacklistedUrls % 100 == 0) {
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Log.logInfo("URLDBCLEANER", "Deleted " + blacklistedUrls + " URLs until now. Last deleted URL-Hash: " + lastBlacklistedUrl);
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}
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}
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lastUrl = metadata.url().toNormalform(true, true);
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lastHash = entry.hash();
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}
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}
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} catch (final RuntimeException e) {
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if (e.getMessage() != null && e.getMessage().indexOf("not found in LURL") != -1) {
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Log.logWarning("URLDBCLEANER", "urlHash not found in LURL", e);
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}
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else {
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Log.logWarning("URLDBCLEANER", "RuntimeException", e);
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run = false;
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}
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} catch (final IOException e) {
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e.printStackTrace();
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run = false;
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} catch (final Exception e) {
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e.printStackTrace();
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run = false;
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}
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Log.logInfo("URLDBCLEANER", "UrldbCleaner-Thread stopped");
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}
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public void abort() {
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synchronized(this) {
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run = false;
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this.notifyAll();
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}
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}
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public void pause() {
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synchronized(this) {
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if (!pause) {
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pause = true;
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Log.logInfo("URLDBCLEANER", "UrldbCleaner-Thread paused");
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}
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}
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}
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public void endPause() {
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synchronized(this) {
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if (pause) {
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pause = false;
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this.notifyAll();
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Log.logInfo("URLDBCLEANER", "UrldbCleaner-Thread resumed");
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}
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}
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}
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}
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// export methods
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public Export export(final File f, final String filter, HandleSet set, final int format, final boolean dom) {
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if ((exportthread != null) && (exportthread.isAlive())) {
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Log.logWarning("LURL-EXPORT", "cannot start another export thread, already one running");
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return exportthread;
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}
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this.exportthread = new Export(f, filter, set, format, dom);
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this.exportthread.start();
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return exportthread;
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}
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public Export export() {
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return this.exportthread;
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}
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public class Export extends Thread {
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private final File f;
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private final String filter;
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private int count;
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private String failure;
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private final int format;
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private final boolean dom;
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private HandleSet set;
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public Export(final File f, final String filter, HandleSet set, final int format, boolean dom) {
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// format: 0=text, 1=html, 2=rss/xml
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this.f = f;
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this.filter = filter;
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this.count = 0;
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this.failure = null;
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this.format = format;
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this.dom = dom;
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this.set = set;
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if ((dom) && (format == 2)) dom = false;
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}
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public void run() {
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try {
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File parentf = f.getParentFile();
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if (parentf != null) parentf.mkdirs();
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final PrintWriter pw = new PrintWriter(new BufferedOutputStream(new FileOutputStream(f)));
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if (format == 1) {
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pw.println("<html><head></head><body>");
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}
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if (format == 2) {
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pw.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
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pw.println("<?xml-stylesheet type='text/xsl' href='/yacysearch.xsl' version='1.0'?>");
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pw.println("<rss version=\"2.0\" xmlns:yacy=\"http://www.yacy.net/\" xmlns:opensearch=\"http://a9.com/-/spec/opensearch/1.1/\" xmlns:atom=\"http://www.w3.org/2005/Atom\">");
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pw.println("<channel>");
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pw.println("<title>YaCy Peer-to-Peer - Web-Search LURL Export</title>");
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pw.println("<description></description>");
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pw.println("<link>http://yacy.net</link>");
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}
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if (dom) {
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TreeSet<String> set = domainNameCollector(-1);
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for (String host: set) {
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if (!host.matches(filter)) continue;
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if (format == 0) pw.println(host);
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if (format == 1) pw.println("<a href=\"http://" + host + "\">" + host + "</a><br>");
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count++;
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}
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} else {
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final Iterator<URLMetadataRow> i = entries(); // iterates indexURLEntry objects
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URLMetadataRow entry;
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URLMetadataRow.Components metadata;
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String url;
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while (i.hasNext()) {
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entry = i.next();
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if (this.set != null && !set.has(entry.hash().getBytes())) continue;
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metadata = entry.metadata();
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url = metadata.url().toNormalform(true, false);
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if (!url.matches(filter)) continue;
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if (format == 0) {
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pw.println(url);
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|
}
|
|
if (format == 1) {
|
|
pw.println("<a href=\"" + url + "\">" + CharacterCoding.unicode2xml(metadata.dc_title(), true) + "</a><br>");
|
|
}
|
|
if (format == 2) {
|
|
pw.println("<item>");
|
|
pw.println("<title>" + CharacterCoding.unicode2xml(metadata.dc_title(), true) + "</title>");
|
|
pw.println("<link>" + yacyURL.escape(url) + "</link>");
|
|
if (metadata.dc_creator().length() > 0) pw.println("<author>" + CharacterCoding.unicode2xml(metadata.dc_creator(), true) + "</author>");
|
|
if (metadata.dc_subject().length() > 0) pw.println("<description>" + CharacterCoding.unicode2xml(metadata.dc_subject(), true) + "</description>");
|
|
pw.println("<pubDate>" + entry.moddate().toString() + "</pubDate>");
|
|
pw.println("<yacy:size>" + entry.size() + "</yacy:size>");
|
|
pw.println("<guid isPermaLink=\"false\">" + entry.hash() + "</guid>");
|
|
pw.println("</item>");
|
|
}
|
|
count++;
|
|
}
|
|
}
|
|
if (format == 1) {
|
|
pw.println("</body></html>");
|
|
}
|
|
if (format == 2) {
|
|
pw.println("</channel>");
|
|
pw.println("</rss>");
|
|
}
|
|
pw.close();
|
|
} catch (final IOException e) {
|
|
e.printStackTrace();
|
|
this.failure = e.getMessage();
|
|
} catch (final Exception e) {
|
|
e.printStackTrace();
|
|
this.failure = e.getMessage();
|
|
}
|
|
// terminate process
|
|
}
|
|
|
|
public File file() {
|
|
return this.f;
|
|
}
|
|
|
|
public String failed() {
|
|
return this.failure;
|
|
}
|
|
|
|
public int count() {
|
|
return this.count;
|
|
}
|
|
|
|
}
|
|
|
|
private HashMap<String, hashStat> domainSampleCollector() throws IOException {
|
|
HashMap<String, hashStat> map = new HashMap<String, hashStat>();
|
|
// first collect all domains and calculate statistics about it
|
|
CloneableIterator<byte[]> i = this.urlIndexFile.keys(true, null);
|
|
String urlhash, hosthash;
|
|
hashStat ds;
|
|
if (i != null) while (i.hasNext()) {
|
|
urlhash = new String(i.next());
|
|
hosthash = urlhash.substring(6);
|
|
ds = map.get(hosthash);
|
|
if (ds == null) {
|
|
ds = new hashStat(urlhash);
|
|
map.put(hosthash, ds);
|
|
} else {
|
|
ds.count++;
|
|
}
|
|
}
|
|
return map;
|
|
}
|
|
|
|
public TreeSet<String> domainNameCollector(int count) throws IOException {
|
|
// collect hashes from all domains
|
|
HashMap<String, hashStat> map = domainSampleCollector();
|
|
|
|
// fetch urls from the database to determine the host in clear text
|
|
URLMetadataRow urlref;
|
|
if (count < 0 || count > map.size()) count = map.size();
|
|
statsDump = new ArrayList<hostStat>();
|
|
TreeSet<String> set = new TreeSet<String>();
|
|
for (hashStat hs: map.values()) {
|
|
if (hs == null) continue;
|
|
urlref = this.load(hs.urlhash, null, 0);
|
|
if (urlref == null || urlref.metadata() == null || urlref.metadata().url() == null || urlref.metadata().url().getHost() == null) continue;
|
|
set.add(urlref.metadata().url().getHost());
|
|
count--;
|
|
if (count == 0) break;
|
|
}
|
|
return set;
|
|
}
|
|
|
|
public Iterator<hostStat> statistics(int count) throws IOException {
|
|
// prevent too heavy IO.
|
|
if (statsDump != null && count <= statsDump.size()) return statsDump.iterator();
|
|
|
|
// collect hashes from all domains
|
|
HashMap<String, hashStat> map = domainSampleCollector();
|
|
|
|
// order elements by size
|
|
ScoreCluster<String> s = new ScoreCluster<String>();
|
|
for (Map.Entry<String, hashStat> e: map.entrySet()) {
|
|
s.addScore(e.getValue().urlhash, e.getValue().count);
|
|
}
|
|
|
|
// fetch urls from the database to determine the host in clear text
|
|
Iterator<String> j = s.scores(false); // iterate urlhash-examples in reverse order (biggest first)
|
|
URLMetadataRow urlref;
|
|
String urlhash;
|
|
count += 10; // make some more to prevent that we have to do this again after deletions too soon.
|
|
if (count < 0 || count > s.size()) count = s.size();
|
|
statsDump = new ArrayList<hostStat>();
|
|
URLMetadataRow.Components comps;
|
|
yacyURL url;
|
|
while (j.hasNext()) {
|
|
urlhash = j.next();
|
|
if (urlhash == null) continue;
|
|
urlref = this.load(urlhash, null, 0);
|
|
if (urlref == null || urlref.metadata() == null || urlref.metadata().url() == null || urlref.metadata().url().getHost() == null) continue;
|
|
if (statsDump == null) return new ArrayList<hostStat>().iterator(); // some other operation has destroyed the object
|
|
comps = urlref.metadata();
|
|
url = comps.url();
|
|
statsDump.add(new hostStat(url.getHost(), url.getPort(), urlhash.substring(6), s.getScore(urlhash)));
|
|
count--;
|
|
if (count == 0) break;
|
|
}
|
|
// finally return an iterator for the result array
|
|
return (statsDump == null) ? new ArrayList<hostStat>().iterator() : statsDump.iterator();
|
|
}
|
|
|
|
private static class hashStat {
|
|
public String urlhash;
|
|
public int count;
|
|
public hashStat(String urlhash) {
|
|
this.urlhash = urlhash;
|
|
this.count = 1;
|
|
}
|
|
}
|
|
|
|
public static class hostStat {
|
|
public String hostname, hosthash;
|
|
public int port;
|
|
public int count;
|
|
public hostStat(String host, int port, String urlhashfragment, int count) {
|
|
assert urlhashfragment.length() == 6;
|
|
this.hostname = host;
|
|
this.port = port;
|
|
this.hosthash = urlhashfragment;
|
|
this.count = count;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* using a fragment of the url hash (5 bytes: bytes 6 to 10) it is possible to address all urls from a specific domain
|
|
* here such a fragment can be used to delete all these domains at once
|
|
* @param hosthash
|
|
* @return number of deleted domains
|
|
* @throws IOException
|
|
*/
|
|
public int deleteDomain(String hosthash) throws IOException {
|
|
// first collect all url hashes that belong to the domain
|
|
assert hosthash.length() == 6;
|
|
ArrayList<String> l = new ArrayList<String>();
|
|
CloneableIterator<byte[]> i = this.urlIndexFile.keys(true, null);
|
|
String hash;
|
|
while (i != null && i.hasNext()) {
|
|
hash = new String(i.next());
|
|
if (hosthash.equals(hash.substring(6))) l.add(hash);
|
|
}
|
|
|
|
// then delete the urls using this list
|
|
int cnt = 0;
|
|
for (String h: l) {
|
|
if (urlIndexFile.remove(h.getBytes()) != null) cnt++;
|
|
}
|
|
|
|
// finally remove the line with statistics
|
|
if (statsDump != null) {
|
|
Iterator<hostStat> hsi = statsDump.iterator();
|
|
hostStat hs;
|
|
while (hsi.hasNext()) {
|
|
hs = hsi.next();
|
|
if (hs.hosthash.equals(hosthash)) {
|
|
hsi.remove();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return cnt;
|
|
}
|
|
}
|