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492 lines
20 KiB
492 lines
20 KiB
// CrawlProfile.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, 2004
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// last major change: 25.02.2004
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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.crawler;
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import java.io.File;
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import java.io.IOException;
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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 de.anomic.kelondro.kelondroBLOB;
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import de.anomic.kelondro.kelondroBLOBTree;
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import de.anomic.kelondro.kelondroBase64Order;
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import de.anomic.kelondro.kelondroCloneableIterator;
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import de.anomic.kelondro.kelondroException;
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import de.anomic.kelondro.kelondroMap;
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import de.anomic.kelondro.kelondroNaturalOrder;
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import de.anomic.server.serverCodings;
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import de.anomic.yacy.yacySeedDB;
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import de.anomic.yacy.yacyURL;
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public class CrawlProfile {
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static HashMap<String, Map<String, DomProfile>> domsCache = new HashMap<String, Map<String, DomProfile>>();
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kelondroMap profileTable;
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private final File profileTableFile;
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public CrawlProfile(final File file) {
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this.profileTableFile = file;
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profileTableFile.getParentFile().mkdirs();
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final kelondroBLOB dyn = new kelondroBLOBTree(profileTableFile, true, true, yacySeedDB.commonHashLength, 2000, '#', kelondroNaturalOrder.naturalOrder, false, false, true);
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profileTable = new kelondroMap(dyn, 500);
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}
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public void clear() {
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// deletes the profile database and creates a new one
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if (profileTable != null) profileTable.close();
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if (!(profileTableFile.delete())) throw new RuntimeException("cannot delete crawl profile database");
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profileTableFile.getParentFile().mkdirs();
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final kelondroBLOB dyn = new kelondroBLOBTree(profileTableFile, true, true, yacySeedDB.commonHashLength, 2000, '#', kelondroNaturalOrder.naturalOrder, false, false, true);
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profileTable = new kelondroMap(dyn, 500);
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}
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public void close() {
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profileTable.close();
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}
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public int size() {
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return profileTable.size();
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}
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public Iterator<entry> profiles(final boolean up) {
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// enumerates profile entries
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try {
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return new profileIterator(up);
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} catch (final IOException e) {
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return new HashSet<entry>().iterator();
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}
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}
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public class profileIterator implements Iterator<entry> {
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// the iterator iterates all keys, which are byte[] objects
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kelondroCloneableIterator<byte[]> handleIterator;
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String lastkey;
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public profileIterator(final boolean up) throws IOException {
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handleIterator = profileTable.keys(up, false);
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lastkey = null;
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}
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public boolean hasNext() {
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try {
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return handleIterator.hasNext();
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} catch (final kelondroException e) {
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clear();
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return false;
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}
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}
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public entry next() {
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try {
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lastkey = new String(handleIterator.next());
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return getEntry(lastkey);
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} catch (final kelondroException e) {
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clear();
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return null;
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}
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}
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public void remove() {
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if (lastkey != null) try {
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removeEntry(lastkey);
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} catch (final kelondroException e) {
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clear();
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}
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}
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}
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public void removeEntry(final String handle) {
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try {
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profileTable.remove(handle);
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} catch (final IOException e) {}
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}
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public entry newEntry(final HashMap<String, String> mem) {
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final entry ne = new entry(mem);
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try {
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profileTable.put(ne.handle(), ne.map());
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} catch (final kelondroException e) {
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clear();
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try {
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profileTable.put(ne.handle(), ne.map());
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} catch (final IOException ee) {
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e.printStackTrace();
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System.exit(0);
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}
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} catch (final IOException e) {
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clear();
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try {
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profileTable.put(ne.handle(), ne.map());
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} catch (final IOException ee) {
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e.printStackTrace();
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System.exit(0);
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}
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}
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return ne;
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}
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public entry newEntry(final String name, final yacyURL startURL, final String generalFilter, final String specificFilter,
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final int generalDepth, final int specificDepth,
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final long recrawlIfOlder /*date*/, final int domFilterDepth, final int domMaxPages,
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final boolean crawlingQ,
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final boolean indexText, final boolean indexMedia,
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final boolean storeHTCache, final boolean storeTXCache,
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final boolean remoteIndexing,
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final boolean xsstopw, final boolean xdstopw, final boolean xpstopw) {
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final entry ne = new entry(name, startURL, generalFilter, specificFilter,
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generalDepth, specificDepth,
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recrawlIfOlder, domFilterDepth, domMaxPages,
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crawlingQ,
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indexText, indexMedia,
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storeHTCache, storeTXCache,
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remoteIndexing,
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xsstopw, xdstopw, xpstopw);
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try {
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profileTable.put(ne.handle(), ne.map());
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} catch (final kelondroException e) {
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clear();
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try {
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profileTable.put(ne.handle(), ne.map());
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} catch (final IOException ee) {
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e.printStackTrace();
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System.exit(0);
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}
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} catch (final IOException e) {
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clear();
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try {
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profileTable.put(ne.handle(), ne.map());
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} catch (final IOException ee) {
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e.printStackTrace();
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System.exit(0);
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}
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}
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return ne;
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}
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public entry getEntry(final String handle) {
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HashMap<String, String> m;
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try {
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m = profileTable.get(handle);
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} catch (final IOException e) {
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return null;
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}
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if (m == null) return null;
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return new entry(m);
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}
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public void changeEntry(final entry e, final String propName, final String newValue) throws IOException {
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e.mem.put(propName, newValue);
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profileTable.put(e.handle(), e.mem);
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}
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public long getRecrawlDate(final long oldTimeMinutes) {
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return System.currentTimeMillis() - (60000L * oldTimeMinutes);
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}
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public static class DomProfile {
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public String referrer;
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public int depth, count;
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public DomProfile(final String ref, final int d) {
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this.referrer = ref;
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this.depth = d;
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this.count = 1;
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}
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public void inc() {
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this.count++;
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}
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}
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public static class entry {
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// this is a simple record structure that hold all properties of a single crawl start
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public static final String HANDLE = "handle";
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public static final String NAME = "name";
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public static final String START_URL = "startURL";
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public static final String GENERAL_FILTER = "generalFilter";
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public static final String SPECIFIC_FILTER = "specificFilter";
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public static final String GENERAL_DEPTH = "generalDepth";
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public static final String SPECIFIC_DEPTH = "specificDepth";
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public static final String RECRAWL_IF_OLDER = "recrawlIfOlder";
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public static final String DOM_FILTER_DEPTH = "domFilterDepth";
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public static final String DOM_MAX_PAGES = "domMaxPages";
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public static final String CRAWLING_Q = "crawlingQ";
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public static final String INDEX_TEXT = "indexText";
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public static final String INDEX_MEDIA = "indexMedia";
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public static final String STORE_HTCACHE = "storeHTCache";
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public static final String STORE_TXCACHE = "storeTXCache";
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public static final String REMOTE_INDEXING = "remoteIndexing";
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public static final String XSSTOPW = "xsstopw";
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public static final String XDSTOPW = "xdstopw";
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public static final String XPSTOPW = "xpstopw";
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HashMap<String, String> mem;
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private Map<String, DomProfile> doms;
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public entry(final String name, final yacyURL startURL, final String generalFilter, final String specificFilter,
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final int generalDepth, final int specificDepth,
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final long recrawlIfOlder /*date*/, final int domFilterDepth, final int domMaxPages,
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final boolean crawlingQ,
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final boolean indexText, final boolean indexMedia,
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final boolean storeHTCache, final boolean storeTXCache,
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final boolean remoteIndexing,
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final boolean xsstopw, final boolean xdstopw, final boolean xpstopw) {
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if (name == null || name.length() == 0) throw new NullPointerException("name must not be null");
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final String handle = (startURL == null) ? kelondroBase64Order.enhancedCoder.encode(serverCodings.encodeMD5Raw(Long.toString(System.currentTimeMillis()))).substring(0, yacySeedDB.commonHashLength) : startURL.hash();
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mem = new HashMap<String, String>();
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mem.put(HANDLE, handle);
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mem.put(NAME, name);
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mem.put(START_URL, (startURL == null) ? "" : startURL.toNormalform(true, false));
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mem.put(GENERAL_FILTER, (generalFilter == null) ? ".*" : generalFilter);
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mem.put(SPECIFIC_FILTER, (specificFilter == null) ? ".*" : specificFilter);
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mem.put(GENERAL_DEPTH, Integer.toString(generalDepth));
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mem.put(SPECIFIC_DEPTH, Integer.toString(specificDepth));
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mem.put(RECRAWL_IF_OLDER, Long.toString(recrawlIfOlder));
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mem.put(DOM_FILTER_DEPTH, Integer.toString(domFilterDepth));
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mem.put(DOM_MAX_PAGES, Integer.toString(domMaxPages));
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mem.put(CRAWLING_Q, Boolean.toString(crawlingQ)); // crawling of urls with '?'
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mem.put(INDEX_TEXT, Boolean.toString(indexText));
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mem.put(INDEX_MEDIA, Boolean.toString(indexMedia));
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mem.put(STORE_HTCACHE, Boolean.toString(storeHTCache));
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mem.put(STORE_TXCACHE, Boolean.toString(storeTXCache));
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mem.put(REMOTE_INDEXING, Boolean.toString(remoteIndexing));
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mem.put(XSSTOPW, Boolean.toString(xsstopw)); // exclude static stop-words
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mem.put(XDSTOPW, Boolean.toString(xdstopw)); // exclude dynamic stop-word
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mem.put(XPSTOPW, Boolean.toString(xpstopw)); // exclude parent stop-words
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doms = new HashMap<String, DomProfile>();
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}
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public String toString() {
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final StringBuffer str = new StringBuffer();
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if (this.mem != null) {
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str.append(this.mem.toString());
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}
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return str.toString();
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}
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public entry(final HashMap<String, String> mem) {
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this.mem = mem;
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this.doms = domsCache.get(this.mem.get(HANDLE));
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if (this.doms == null) this.doms = new HashMap<String, DomProfile>();
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}
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public HashMap<String, String> map() {
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return mem;
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}
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public String handle() {
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final String r = mem.get(HANDLE);
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//if (r == null) return null;
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return r;
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}
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public String name() {
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final String r = mem.get(NAME);
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if (r == null) return "";
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return r;
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}
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public String startURL() {
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final String r = mem.get(START_URL);
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return r;
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}
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public String generalFilter() {
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final String r = mem.get(GENERAL_FILTER);
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if (r == null) return ".*";
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return r;
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}
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public String specificFilter() {
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final String r = mem.get(SPECIFIC_FILTER);
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if (r == null) return ".*";
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return r;
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}
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public int generalDepth() {
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final String r = mem.get(GENERAL_DEPTH);
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if (r == null) return 0;
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try {
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return Integer.parseInt(r);
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} catch (final NumberFormatException e) {
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return 0;
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}
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}
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public int specificDepth() {
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final String r = mem.get(SPECIFIC_DEPTH);
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if (r == null) return 0;
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try {
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return Integer.parseInt(r);
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} catch (final NumberFormatException e) {
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return 0;
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}
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}
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public long recrawlIfOlder() {
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// returns a long (millis) that is the minimum age that
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// an entry must have to be re-crawled
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final String r = mem.get(RECRAWL_IF_OLDER);
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if (r == null) return 0L;
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try {
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final long l = Long.parseLong(r);
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return (l < 0) ? 0L : l;
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} catch (final NumberFormatException e) {
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return 0L;
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}
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}
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public int domFilterDepth() {
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// if the depth is equal or less to this depth,
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// then the current url feeds with its domain the crawl filter
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// if this is -1, all domains are feeded
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final String r = mem.get(DOM_FILTER_DEPTH);
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if (r == null) return Integer.MAX_VALUE;
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try {
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final int i = Integer.parseInt(r);
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if (i < 0) return Integer.MAX_VALUE;
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return i;
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} catch (final NumberFormatException e) {
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return Integer.MAX_VALUE;
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}
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}
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public int domMaxPages() {
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// this is the maximum number of pages that are crawled for a single domain
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// if -1, this means no limit
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final String r = mem.get(DOM_MAX_PAGES);
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if (r == null) return Integer.MAX_VALUE;
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try {
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final int i = Integer.parseInt(r);
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if (i < 0) return Integer.MAX_VALUE;
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return i;
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} catch (final NumberFormatException e) {
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return Integer.MAX_VALUE;
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}
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}
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public boolean crawlingQ() {
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final String r = mem.get(CRAWLING_Q);
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if (r == null) return false;
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return (r.equals(Boolean.TRUE.toString()));
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}
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public boolean indexText() {
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final String r = mem.get(INDEX_TEXT);
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if (r == null) return true;
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return (r.equals(Boolean.TRUE.toString()));
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}
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public boolean indexMedia() {
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final String r = mem.get(INDEX_MEDIA);
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if (r == null) return true;
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return (r.equals(Boolean.TRUE.toString()));
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}
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public boolean storeHTCache() {
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final String r = mem.get(STORE_HTCACHE);
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if (r == null) return false;
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return (r.equals(Boolean.TRUE.toString()));
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}
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public boolean storeTXCache() {
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final String r = mem.get(STORE_TXCACHE);
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if (r == null) return false;
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return (r.equals(Boolean.TRUE.toString()));
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}
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public boolean remoteIndexing() {
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final String r = mem.get(REMOTE_INDEXING);
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if (r == null) return false;
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return (r.equals(Boolean.TRUE.toString()));
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}
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public boolean excludeStaticStopwords() {
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final String r = mem.get(XSSTOPW);
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if (r == null) return false;
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return (r.equals(Boolean.TRUE.toString()));
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}
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public boolean excludeDynamicStopwords() {
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final String r = mem.get(XDSTOPW);
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if (r == null) return false;
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return (r.equals(Boolean.TRUE.toString()));
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}
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public boolean excludeParentStopwords() {
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final String r = mem.get(XPSTOPW);
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if (r == null) return false;
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return (r.equals(Boolean.TRUE.toString()));
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}
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public void domInc(final String domain, final String referrer, final int depth) {
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synchronized (domain.intern()) {
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final DomProfile dp = doms.get(domain);
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if (dp == null) {
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// new domain
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doms.put(domain, new DomProfile(referrer, depth));
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} else {
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// increase counter
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dp.inc();
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doms.put(domain, dp);
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}
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}
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domsCache.put(this.mem.get(HANDLE), doms);
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}
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public boolean grantedDomAppearance(final String domain) {
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final int max = domFilterDepth();
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if (max == Integer.MAX_VALUE) return true;
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synchronized (domain.intern()) {
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final DomProfile dp = doms.get(domain);
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if (dp == null) {
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return 0 < max;
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}
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return dp.depth <= max;
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}
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}
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public boolean grantedDomCount(final String domain) {
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final int max = domMaxPages();
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if (max == Integer.MAX_VALUE) return true;
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synchronized (domain.intern()) {
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final DomProfile dp = doms.get(domain);
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if (dp == null) {
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return 0 < max;
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}
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return dp.count <= max;
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}
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}
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public int domSize() {
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return doms.size();
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}
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public boolean domExists(final String domain) {
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if (domFilterDepth() == Integer.MAX_VALUE) return true;
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return doms.containsKey(domain);
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}
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public String domName(final boolean attr, final int index){
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final Iterator<Map.Entry<String, DomProfile>> domnamesi = doms.entrySet().iterator();
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String domname="";
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Map.Entry<String, DomProfile> ey;
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DomProfile dp;
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int i = 0;
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while ((domnamesi.hasNext()) && (i < index)) {
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ey = domnamesi.next();
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i++;
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}
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if(domnamesi.hasNext()){
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ey = domnamesi.next();
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dp = ey.getValue();
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domname = ey.getKey() + ((attr) ? ("/r=" + dp.referrer + ", d=" + dp.depth + ", c=" + dp.count) : " ");
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}
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return domname;
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}
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}
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}
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