mirror of
https://github.com/yacy/yacy_search_server.git
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c527969185
for details, please try http://localhost:8080/IndexControlRWIs_p.html - fixed computation of ranking ordering in some cases git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@4220 6c8d7289-2bf4-0310-a012-ef5d649a1542
486 lines
20 KiB
Java
486 lines
20 KiB
Java
// indexURLEntry.java
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// (C) 2006 by Michael Peter Christen; mc@anomic.de, Frankfurt a. M., Germany
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// first published 2006 on http://www.anomic.de
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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.index;
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import java.net.MalformedURLException;
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import java.text.ParseException;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.Properties;
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import de.anomic.kelondro.kelondroBase64Order;
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import de.anomic.kelondro.kelondroBitfield;
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import de.anomic.kelondro.kelondroException;
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import de.anomic.kelondro.kelondroNaturalOrder;
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import de.anomic.kelondro.kelondroRow;
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import de.anomic.plasma.plasmaCrawlEntry;
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import de.anomic.plasma.plasmaSearchQuery;
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import de.anomic.server.serverCharBuffer;
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import de.anomic.server.serverCodings;
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import de.anomic.server.serverDate;
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import de.anomic.tools.crypt;
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import de.anomic.tools.nxTools;
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import de.anomic.yacy.yacyURL;
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import de.anomic.index.indexRWIEntry;
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public class indexURLEntry {
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// this object stores attributes for URL entries
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public static final kelondroRow rowdef = new kelondroRow(
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"String hash-12, " + // the url's hash
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"String comp-360, " + // components: the url, description, author and tags. As 5th element, an ETag is possible
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"Cardinal mod-4 {b256}, " + // last-modified from the httpd
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"Cardinal load-4 {b256}, " + // time when the url was loaded
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"Cardinal fresh-4 {b256}, " + // time until this url is fresh
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"String referrer-12, " + // (one of) the url's referrer hash(es)
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"byte[] md5-8, " + // the md5 of the url content (to identify changes)
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"Cardinal size-6 {b256}, " + // size of file in bytes
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"Cardinal wc-3 {b256}, " + // size of file by number of words; for video and audio: seconds
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"byte[] dt-1, " + // doctype, taken from extension or any other heuristic
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"Bitfield flags-4, " + // flags; any stuff (see Word-Entity definition)
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"String lang-2, " + // language
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"Cardinal llocal-2 {b256}, " + // # of outlinks to same domain; for video and image: width
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"Cardinal lother-2 {b256}, " + // # of outlinks to outside domain; for video and image: height
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"Cardinal limage-2 {b256}, " + // # of embedded image links
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"Cardinal laudio-2 {b256}, " + // # of embedded audio links; for audio: track number; for video: number of audio tracks
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"Cardinal lvideo-2 {b256}, " + // # of embedded video links
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"Cardinal lapp-2 {b256}", // # of embedded links to applications
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kelondroBase64Order.enhancedCoder,
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0);
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/* ===========================================================================
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* Constants to access the various columns of an URL entry
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* =========================================================================== */
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/** the url's hash */
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private static final int col_hash = 0;
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/** components: the url, description, author and tags. As 5th element, an ETag is possible */
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private static final int col_comp = 1;
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/** components: the url, description, author and tags. As 5th element, an ETag is possible */
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private static final int col_mod = 2;
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/** time when the url was loaded */
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private static final int col_load = 3;
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/** time until this url is fresh */
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private static final int col_fresh = 4;
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/** time when the url was loaded */
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private static final int col_referrer = 5;
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/** the md5 of the url content (to identify changes) */
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private static final int col_md5 = 6;
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/** size of file in bytes */
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private static final int col_size = 7;
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/** size of file by number of words; for video and audio: seconds */
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private static final int col_wc = 8;
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/** doctype, taken from extension or any other heuristic */
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private static final int col_dt = 9;
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/** flags; any stuff (see Word-Entity definition) */
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private static final int col_flags = 10;
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/** language */
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private static final int col_lang = 11;
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/** of outlinks to same domain; for video and image: width */
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private static final int col_llocal = 12;
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/** of outlinks to outside domain; for video and image: height */
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private static final int col_lother = 13;
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/** of embedded image links */
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private static final int col_limage = 14;
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/** of embedded audio links; for audio: track number; for video: number of audio tracks */
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private static final int col_laudio = 15;
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/** of embedded video links */
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private static final int col_lvideo = 16;
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/** of embedded links to applications */
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private static final int col_lapp = 17;
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private kelondroRow.Entry entry;
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private String snippet;
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private indexRWIEntry word; // this is only used if the url is transported via remote search requests
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private long ranking; // during generation of a search result this value is set
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public indexURLEntry(
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yacyURL url,
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String descr,
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String author,
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String tags,
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String ETag,
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Date mod,
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Date load,
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Date fresh,
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String referrer,
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byte[] md5,
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long size,
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int wc,
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char dt,
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kelondroBitfield flags,
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String lang,
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int llocal,
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int lother,
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int laudio,
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int limage,
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int lvideo,
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int lapp) {
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// create new entry and store it into database
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this.entry = rowdef.newEntry();
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this.entry.setCol(col_hash, url.hash(), null);
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this.entry.setCol(col_comp, encodeComp(url, descr, author, tags, ETag));
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encodeDate(col_mod, mod);
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encodeDate(col_load, load);
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encodeDate(col_fresh, fresh);
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this.entry.setCol(col_referrer, (referrer == null) ? null : referrer.getBytes());
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this.entry.setCol(col_md5, md5);
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this.entry.setCol(col_size, size);
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this.entry.setCol(col_wc, wc);
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this.entry.setCol(col_dt, new byte[]{(byte) dt});
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this.entry.setCol(col_flags, flags.bytes());
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this.entry.setCol(col_lang, lang.getBytes());
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this.entry.setCol(col_llocal, llocal);
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this.entry.setCol(col_lother, lother);
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this.entry.setCol(col_limage, limage);
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this.entry.setCol(col_laudio, laudio);
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this.entry.setCol(col_lvideo, lvideo);
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this.entry.setCol(col_lapp, lapp);
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//System.out.println("===DEBUG=== " + load.toString() + ", " + decodeDate(col_load).toString());
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this.snippet = null;
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this.word = null;
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this.ranking = 0;
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}
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private void encodeDate(int col, Date d) {
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// calculates the number of days since 1.1.1970 and returns this as 4-byte array
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this.entry.setCol(col, kelondroNaturalOrder.encodeLong(d.getTime() / 86400000, 4));
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}
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private Date decodeDate(int col) {
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return new Date(86400000 * this.entry.getColLong(col));
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}
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public static byte[] encodeComp(yacyURL url, String descr, String author, String tags, String ETag) {
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serverCharBuffer s = new serverCharBuffer(200);
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s.append(url.toNormalform(false, true)).append(10);
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s.append(descr).append(10);
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s.append(author).append(10);
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s.append(tags).append(10);
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s.append(ETag).append(10);
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return s.toString().getBytes();
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}
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public indexURLEntry(kelondroRow.Entry entry, indexRWIEntry searchedWord, long ranking) {
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this.entry = entry;
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this.snippet = null;
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this.word = searchedWord;
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this.ranking = ranking;
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}
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public indexURLEntry(Properties prop){
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// generates an plasmaLURLEntry using the properties from the argument
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// the property names must correspond to the one from toString
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//System.out.println("DEBUG-ENTRY: prop=" + prop.toString());
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yacyURL url;
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try {
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url = new yacyURL(crypt.simpleDecode(prop.getProperty("url", ""), null), prop.getProperty("hash"));
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} catch (MalformedURLException e) {
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url = null;
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}
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String descr = crypt.simpleDecode(prop.getProperty("descr", ""), null); if (descr == null) descr = "";
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String author = crypt.simpleDecode(prop.getProperty("author", ""), null); if (author == null) author = "";
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String tags = crypt.simpleDecode(prop.getProperty("tags", ""), null); if (tags == null) tags = "";
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String ETag = crypt.simpleDecode(prop.getProperty("ETag", ""), null); if (ETag == null) ETag = "";
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this.entry = rowdef.newEntry();
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this.entry.setCol(col_hash, url.hash(), null);
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this.entry.setCol(col_comp, encodeComp(url, descr, author, tags, ETag));
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try {
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encodeDate(col_mod, serverDate.shortDayFormatter.parse(prop.getProperty("mod", "20000101")));
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} catch (ParseException e) {
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encodeDate(col_mod, new Date());
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}
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try {
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encodeDate(col_load, serverDate.shortDayFormatter.parse(prop.getProperty("load", "20000101")));
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} catch (ParseException e) {
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encodeDate(col_load, new Date());
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}
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try {
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encodeDate(col_fresh, serverDate.shortDayFormatter.parse(prop.getProperty("fresh", "20000101")));
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} catch (ParseException e) {
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encodeDate(col_fresh, new Date());
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}
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this.entry.setCol(col_referrer, prop.getProperty("referrer", yacyURL.dummyHash).getBytes());
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this.entry.setCol(col_md5, serverCodings.decodeHex(prop.getProperty("md5", "")));
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this.entry.setCol(col_size, Integer.parseInt(prop.getProperty("size", "0")));
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this.entry.setCol(col_wc, Integer.parseInt(prop.getProperty("wc", "0")));
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this.entry.setCol(col_dt, new byte[]{(byte) prop.getProperty("dt", "t").charAt(0)});
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String flags = prop.getProperty("flags", "AAAAAA");
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this.entry.setCol(col_flags, (flags.length() > 6) ? plasmaSearchQuery.empty_constraint.bytes() : (new kelondroBitfield(4, flags)).bytes());
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this.entry.setCol(col_lang, prop.getProperty("lang", "uk").getBytes());
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this.entry.setCol(col_llocal, Integer.parseInt(prop.getProperty("llocal", "0")));
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this.entry.setCol(col_lother, Integer.parseInt(prop.getProperty("lother", "0")));
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this.entry.setCol(col_limage, Integer.parseInt(prop.getProperty("limage", "0")));
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this.entry.setCol(col_laudio, Integer.parseInt(prop.getProperty("laudio", "0")));
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this.entry.setCol(col_lvideo, Integer.parseInt(prop.getProperty("lvideo", "0")));
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this.entry.setCol(col_lapp, Integer.parseInt(prop.getProperty("lapp", "0")));
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this.snippet = crypt.simpleDecode(prop.getProperty("snippet", ""), null);
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this.word = null;
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if (prop.containsKey("word")) throw new kelondroException("old database structure is not supported");
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if (prop.containsKey("wi")) {
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this.word = new indexRWIRowEntry(kelondroBase64Order.enhancedCoder.decodeString(prop.getProperty("wi", "")));
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}
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this.ranking = 0;
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}
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private StringBuffer corePropList() {
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// generate a parseable string; this is a simple property-list
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indexURLEntry.Components comp = this.comp();
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final StringBuffer s = new StringBuffer(300);
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//System.out.println("author=" + comp.author());
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try {
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s.append("hash=").append(hash());
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s.append(",url=").append(crypt.simpleEncode(comp.url().toNormalform(false, true)));
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s.append(",descr=").append(crypt.simpleEncode(comp.title()));
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s.append(",author=").append(crypt.simpleEncode(comp.author()));
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s.append(",tags=").append(crypt.simpleEncode(comp.tags()));
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s.append(",ETag=").append(crypt.simpleEncode(comp.ETag()));
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s.append(",mod=").append(serverDate.shortDayFormatter.format(moddate()));
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s.append(",load=").append(serverDate.shortDayFormatter.format(loaddate()));
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s.append(",fresh=").append(serverDate.shortDayFormatter.format(freshdate()));
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s.append(",referrer=").append(referrerHash());
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s.append(",md5=").append(md5());
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s.append(",size=").append(size());
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s.append(",wc=").append(wordCount());
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s.append(",dt=").append(doctype());
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s.append(",flags=").append(flags().exportB64());
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s.append(",lang=").append(language());
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s.append(",llocal=").append(llocal());
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s.append(",lother=").append(lother());
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s.append(",limage=").append(limage());
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s.append(",laudio=").append(laudio());
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s.append(",lvideo=").append(lvideo());
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s.append(",lapp=").append(lapp());
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if (this.word != null) {
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// append also word properties
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s.append(",wi=").append(kelondroBase64Order.enhancedCoder.encodeString(word.toPropertyForm()));
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}
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return s;
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} catch (Exception e) {
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// serverLog.logFailure("plasmaLURL.corePropList", e.getMessage());
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// if (moddate == null) serverLog.logFailure("plasmaLURL.corePropList", "moddate=null");
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// if (loaddate == null) serverLog.logFailure("plasmaLURL.corePropList", "loaddate=null");
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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 kelondroRow.Entry toRowEntry() {
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return this.entry;
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}
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public String hash() {
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// return a url-hash, based on the md5 algorithm
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// the result is a String of 12 bytes within a 72-bit space
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// (each byte has an 6-bit range)
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// that should be enough for all web pages on the world
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return this.entry.getColString(col_hash, null);
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}
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public long ranking() {
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return this.ranking;
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}
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public indexURLEntry.Components comp() {
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ArrayList cl = nxTools.strings(this.entry.getCol("comp", null), "UTF-8");
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return new indexURLEntry.Components(
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(cl.size() > 0) ? ((String) cl.get(0)).trim() : "",
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hash(),
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(cl.size() > 1) ? ((String) cl.get(1)).trim() : "",
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(cl.size() > 2) ? ((String) cl.get(2)).trim() : "",
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(cl.size() > 3) ? ((String) cl.get(3)).trim() : "",
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(cl.size() > 4) ? ((String) cl.get(4)).trim() : "");
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}
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public Date moddate() {
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return decodeDate(col_mod);
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}
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public Date loaddate() {
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return decodeDate(col_load);
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}
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public Date freshdate() {
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return decodeDate(col_fresh);
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}
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public String referrerHash() {
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// return the creator's hash
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return entry.getColString(col_referrer, null);
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}
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public String md5() {
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// returns the md5 in hex representation
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return serverCodings.encodeHex(entry.getColBytes(col_md5));
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}
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public char doctype() {
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return (char) entry.getColByte(col_dt);
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}
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public String language() {
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return this.entry.getColString(col_lang, null);
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}
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public int size() {
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return (int) this.entry.getColLong(col_size);
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}
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public kelondroBitfield flags() {
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return new kelondroBitfield(this.entry.getColBytes(col_flags));
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}
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public int wordCount() {
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return (int) this.entry.getColLong(col_wc);
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}
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public int llocal() {
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return (int) this.entry.getColLong(col_llocal);
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}
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public int lother() {
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return (int) this.entry.getColLong(col_lother);
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}
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public int limage() {
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return (int) this.entry.getColLong(col_limage);
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}
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public int laudio() {
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return (int) this.entry.getColLong(col_laudio);
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}
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public int lvideo() {
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return (int) this.entry.getColLong(col_lvideo);
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}
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public int lapp() {
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return (int) this.entry.getColLong(col_lapp);
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}
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public String snippet() {
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// the snippet may appear here if the url was transported in a remote search
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// it will not be saved anywhere, but can only be requested here
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return snippet;
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}
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public indexRWIEntry word() {
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return word;
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}
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public boolean isOlder(indexURLEntry other) {
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if (other == null) return false;
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Date tmoddate = moddate();
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Date omoddate = other.moddate();
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if (tmoddate.before(omoddate)) return true;
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if (tmoddate.equals(omoddate)) {
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Date tloaddate = loaddate();
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Date oloaddate = other.loaddate();
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if (tloaddate.before(oloaddate)) return true;
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if (tloaddate.equals(oloaddate)) return true;
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}
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return false;
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}
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public String toString(String snippet) {
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// add information needed for remote transport
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final StringBuffer core = corePropList();
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if (core == null)
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return null;
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core.ensureCapacity(core.length() + snippet.length() * 2);
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core.insert(0, "{");
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core.append(",snippet=").append(crypt.simpleEncode(snippet));
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core.append("}");
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return new String(core);
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//return "{" + core + ",snippet=" + crypt.simpleEncode(snippet) + "}";
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}
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public plasmaCrawlEntry toBalancerEntry() {
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return new plasmaCrawlEntry(
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null,
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comp().url(),
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referrerHash(),
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comp().title(),
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loaddate(),
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null,
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0,
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0,
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0);
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}
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/**
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* @return the object as String.<br>
|
|
* This e.g. looks like this:
|
|
* <pre>{hash=jmqfMk7Y3NKw,referrer=------------,mod=20050610,load=20051003,size=51666,wc=1392,cc=0,local=true,q=AEn,dt=h,lang=uk,url=b|aHR0cDovL3d3dy50cmFuc3BhcmVuY3kub3JnL3N1cnZleXMv,descr=b|S25vd2xlZGdlIENlbnRyZTogQ29ycnVwdGlvbiBTdXJ2ZXlzIGFuZCBJbmRpY2Vz}</pre>
|
|
*/
|
|
public String toString() {
|
|
final StringBuffer core = corePropList();
|
|
if (core == null) return null;
|
|
|
|
core.insert(0, "{");
|
|
core.append("}");
|
|
|
|
return new String(core);
|
|
//return "{" + core + "}";
|
|
}
|
|
|
|
public class Components {
|
|
private yacyURL url;
|
|
private String title, author, tags, ETag;
|
|
|
|
public Components(String url, String urlhash, String title, String author, String tags, String ETag) {
|
|
try {
|
|
this.url = new yacyURL(url, urlhash);
|
|
} catch (MalformedURLException e) {
|
|
this.url = null;
|
|
}
|
|
this.title = title;
|
|
this.author = author;
|
|
this.tags = tags;
|
|
this.ETag = ETag;
|
|
}
|
|
public Components(yacyURL url, String descr, String author, String tags, String ETag) {
|
|
this.url = url;
|
|
this.title = descr;
|
|
this.author = author;
|
|
this.tags = tags;
|
|
this.ETag = ETag;
|
|
}
|
|
public yacyURL url() { return this.url; }
|
|
public String title() { return this.title; }
|
|
public String author() { return this.author; }
|
|
public String tags() { return this.tags; }
|
|
public String ETag() { return this.ETag; }
|
|
}
|
|
|
|
} |