Michael Peter Christen
11 years ago
commit
c64c10ef00
@ -1,509 +0,0 @@
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// URLMetadataRow.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 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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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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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 private 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 private License for more details.
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//
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// You should have received a copy of the GNU General private License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package net.yacy.kelondro.data.meta;
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import java.net.MalformedURLException;
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import java.text.ParseException;
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import java.util.Date;
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import java.util.List;
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import java.util.Properties;
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import net.yacy.cora.date.GenericFormatter;
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import net.yacy.cora.document.encoding.ASCII;
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import net.yacy.cora.document.encoding.UTF8;
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import net.yacy.cora.document.id.DigestURL;
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import net.yacy.cora.lod.vocabulary.Tagging;
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import net.yacy.cora.order.Base64Order;
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import net.yacy.cora.order.Digest;
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import net.yacy.cora.order.NaturalOrder;
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import net.yacy.cora.util.ByteBuffer;
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import net.yacy.cora.util.ConcurrentLog;
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import net.yacy.kelondro.data.word.WordReference;
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import net.yacy.kelondro.data.word.WordReferenceRow;
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import net.yacy.kelondro.data.word.WordReferenceVars;
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import net.yacy.kelondro.index.Row;
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import net.yacy.kelondro.io.CharBuffer;
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import net.yacy.kelondro.util.Bitfield;
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import net.yacy.kelondro.util.MapTools;
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import net.yacy.kelondro.util.kelondroException;
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import net.yacy.search.query.QueryParams;
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import net.yacy.utils.crypt;
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public class URIMetadataRow {
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// this object stores attributes for URL entries
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private static final Row rowdef = new Row(
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"String hash-12, " + // the url's hash
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"String comp-360, " + // components: the url, description, author, tags and publisher
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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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"byte[] 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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Base64Order.enhancedCoder
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);
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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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private static final int col_hash = 0; // the url's hash
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private static final int col_comp = 1; // 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; // the modifed-date time from the server (servertime in row)
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private static final int col_load = 3; // time when the url was loaded
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private static final int col_fresh = 4; // time until this url is fresh
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private static final int col_referrer = 5; // a referrer of the url (there may be several, but this is the one that was acually referring to this one)
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private static final int col_md5 = 6; // the md5 of the url content (to identify changes)
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private static final int col_size = 7; // size of file in bytes
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private static final int col_wc = 8; // size of file by number of words; for video and audio: seconds
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private static final int col_dt = 9; // doctype, taken from extension or any other heuristic
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private static final int col_flags = 10; // flags; any stuff (see Word-Entity definition)
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private static final int col_lang = 11; // language
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private static final int col_llocal = 12; // # of outlinks to same domain; for video and image: width
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private static final int col_lother = 13; // # of outlinks to outside domain; for video and image: height
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private static final int col_limage = 14; // # of embedded image links
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private static final int col_laudio = 15; // # of embedded audio links; for audio: track number; for video: number of audio tracks
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private static final int col_lvideo = 16; // # of embedded video links
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private static final int col_lapp = 17; // # of embedded links to applications
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private final Row.Entry entry;
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private final String snippet;
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private WordReference word; // this is only used if the url is transported via remote search requests
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private Components comp;
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private URIMetadataRow(final Row.Entry entry, final WordReference searchedWord) {
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this.entry = entry;
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this.snippet = "";
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this.word = searchedWord;
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this.comp = null;
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}
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private URIMetadataRow(final Properties prop) throws kelondroException {
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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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DigestURL url;
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String urls = crypt.simpleDecode(prop.getProperty("url", ""));
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try {
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url = new DigestURL(urls);
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} catch (final MalformedURLException e) {
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throw new kelondroException("bad url: " + urls);
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}
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String descr = crypt.simpleDecode(prop.getProperty("descr", "")); if (descr == null) descr = "";
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String dc_creator = crypt.simpleDecode(prop.getProperty("author", "")); if (dc_creator == null) dc_creator = "";
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String tags = crypt.simpleDecode(prop.getProperty("tags", "")); if (tags == null) tags = "";
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tags = Tagging.cleanTagFromAutotagging(tags);
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String dc_publisher = crypt.simpleDecode(prop.getProperty("publisher", "")); if (dc_publisher == null) dc_publisher = "";
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String lons = crypt.simpleDecode(prop.getProperty("lon", "0.0")); if (lons == null) lons = "0.0";
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String lats = crypt.simpleDecode(prop.getProperty("lat", "0.0")); if (lats == null) lats = "0.0";
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this.entry = rowdef.newEntry();
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this.entry.setCol(col_hash, url.hash()); // FIXME potential null pointer access
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this.entry.setCol(col_comp, encodeComp(url, descr, dc_creator, tags, dc_publisher, Float.parseFloat(lats), Float.parseFloat(lons)));
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// create new formatters to make concurrency possible
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final GenericFormatter formatter = new GenericFormatter(GenericFormatter.FORMAT_SHORT_DAY, GenericFormatter.time_minute);
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try {
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encodeDate(col_mod, formatter.parse(prop.getProperty("mod", "20000101")));
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} catch (final 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, formatter.parse(prop.getProperty("load", "20000101")));
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} catch (final 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, formatter.parse(prop.getProperty("fresh", "20000101")));
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} catch (final ParseException e) {
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encodeDate(col_fresh, new Date());
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}
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this.entry.setCol(col_referrer, UTF8.getBytes(prop.getProperty("referrer", "")));
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this.entry.setCol(col_md5, Digest.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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final String dt = prop.getProperty("dt", "t");
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this.entry.setCol(col_dt, dt.isEmpty() ? new byte[]{(byte) 't'} : new byte[]{(byte) dt.charAt(0)});
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final String flags = prop.getProperty("flags", "AAAAAA");
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this.entry.setCol(col_flags, (flags.length() > 6) ? QueryParams.empty_constraint.bytes() : (new Bitfield(4, flags)).bytes());
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this.entry.setCol(col_lang, UTF8.getBytes(prop.getProperty("lang", "")));
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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", ""));
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this.word = null;
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if (prop.containsKey("wi")) {
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this.word = new WordReferenceVars(new WordReferenceRow(Base64Order.enhancedCoder.decodeString(prop.getProperty("wi", ""))), false);
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}
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this.comp = null;
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}
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public static URIMetadataRow importEntry(final String propStr) {
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if (propStr == null || propStr.isEmpty() || propStr.charAt(0) != '{' || !propStr.endsWith("}")) {
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ConcurrentLog.severe("URIMetadataRow", "importEntry: propStr is not proper: " + propStr);
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return null;
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}
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try {
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return new URIMetadataRow(MapTools.s2p(propStr.substring(1, propStr.length() - 1)));
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} catch (final kelondroException e) {
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// wrong format
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ConcurrentLog.severe("URIMetadataRow", e.getMessage());
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return null;
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}
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}
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private void encodeDate(final int col, final 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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// 86400000 is the number of milliseconds in one day
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long time = d.getTime();
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long now = System.currentTimeMillis();
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this.entry.setCol(col, NaturalOrder.encodeLong((time > now ? now : time) / 86400000L, 4));
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}
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private Date decodeDate(final int col) {
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final long t = this.entry.getColLong(col);
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/*if (t < 14600) */return new Date(86400000L * t); // time was stored as number of days since epoch
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/*
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if (t < 350400) return new Date(3600000L * t); // hours since epoch
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if (t < 21024000) return new Date(60000L * t); // minutes since epoch
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*/
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}
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private static byte[] encodeComp(
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final DigestURL url,
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final String dc_title,
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final String dc_creator,
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final String dc_subject,
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final String dc_publisher,
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final double lat,
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final double lon) {
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final CharBuffer s = new CharBuffer(3600, 360);
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s.append(url.toNormalform(true)).appendLF();
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s.append(dc_title).appendLF();
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if (dc_creator.length() > 80) s.append(dc_creator, 0, 80); else s.append(dc_creator);
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s.appendLF();
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if (dc_subject.length() > 120) s.append(dc_subject, 0, 120); else s.append(dc_subject);
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s.appendLF();
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if (dc_publisher.length() > 80) s.append(dc_publisher, 0, 80); else s.append(dc_publisher);
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s.appendLF();
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if (lon == 0.0 && lat == 0.0) s.appendLF(); else s.append(Double.toString(lat)).append(',').append(Double.toString(lon)).appendLF();
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String s0 = s.toString();
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s.close();
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return UTF8.getBytes(s0);
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}
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public byte[] 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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final byte[] h = this.entry.getPrimaryKeyBytes();
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return h;
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}
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public DigestURL url() {
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return this.metadata().url();
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}
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public String dc_title() {
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return this.metadata().dc_title();
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}
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public String dc_creator() {
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return this.metadata().dc_creator();
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}
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public String dc_publisher() {
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return this.metadata().dc_publisher();
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}
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public String dc_subject() {
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return this.metadata().dc_subject();
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}
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public double lat() {
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return this.metadata().lat();
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}
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public double lon() {
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return this.metadata().lon();
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}
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public Components metadata() {
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// avoid double computation of metadata elements
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if (this.comp != null) return this.comp;
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// parse elements from comp field;
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final byte[] c = this.entry.getColBytes(col_comp, true);
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final List<byte[]> cl = ByteBuffer.split(c, (byte) 10);
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this.comp = new Components(
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(cl.size() > 0) ? UTF8.String(cl.get(0)) : "",
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hash(),
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(cl.size() > 1) ? UTF8.String(cl.get(1)) : "",
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(cl.size() > 2) ? UTF8.String(cl.get(2)) : "",
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(cl.size() > 3) ? UTF8.String(cl.get(3)) : "",
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(cl.size() > 4) ? UTF8.String(cl.get(4)) : "",
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(cl.size() > 5) ? UTF8.String(cl.get(5)) : "");
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return this.comp;
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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 byte[] referrerHash() {
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// return the creator's hash or null if there is none
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// FIXME: There seem to be some malformed entries in the databasees like "null\0\0\0\0\0\0\0\0"
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final byte[] r = this.entry.getColBytes(col_referrer, true);
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if (r != null) {
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int i = r.length;
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while (i > 0) {
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if (r[--i] == 0) return null;
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}
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}
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return r;
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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 Digest.encodeHex(this.entry.getColBytes(col_md5, true));
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}
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public char doctype() {
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return (char) this.entry.getColByte(col_dt);
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}
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public byte[] language() {
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byte[] b = this.entry.getColBytes(col_lang, true);
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if ((b == null || b[0] == (byte)'[') && this.metadata().url != null) {
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String lang = this.metadata().url.language(); // calculate lang by TLD
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this.entry.setCol(col_lang, UTF8.getBytes(lang)); //remember calculation
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return ASCII.getBytes(lang);
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}
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return b;
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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 Bitfield flags() {
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return new Bitfield(this.entry.getColBytes(col_flags, true));
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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 this.snippet;
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}
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public WordReference word() {
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return this.word;
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}
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private static StringBuilder corePropList(URIMetadataRow md) {
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// generate a parseable string; this is a simple property-list
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final StringBuilder s = new StringBuilder(300);
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// create new formatters to make concurrency possible
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final GenericFormatter formatter = new GenericFormatter(GenericFormatter.FORMAT_SHORT_DAY, GenericFormatter.time_minute);
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try {
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s.append("hash=").append(ASCII.String(md.hash()));
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s.append(",url=").append(crypt.simpleEncode(md.url().toNormalform(true)));
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s.append(",descr=").append(crypt.simpleEncode(md.dc_title()));
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s.append(",author=").append(crypt.simpleEncode(md.dc_creator()));
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s.append(",tags=").append(crypt.simpleEncode(Tagging.cleanTagFromAutotagging(md.dc_subject())));
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s.append(",publisher=").append(crypt.simpleEncode(md.dc_publisher()));
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s.append(",lat=").append(md.lat());
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s.append(",lon=").append(md.lon());
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s.append(",mod=").append(formatter.format(md.moddate()));
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s.append(",load=").append(formatter.format(md.loaddate()));
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s.append(",fresh=").append(formatter.format(md.freshdate()));
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s.append(",referrer=").append(md.referrerHash() == null ? "" : ASCII.String(md.referrerHash()));
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s.append(",md5=").append(md.md5());
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s.append(",size=").append(md.size());
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s.append(",wc=").append(md.wordCount());
|
||||
s.append(",dt=").append(md.doctype());
|
||||
s.append(",flags=").append(md.flags().exportB64());
|
||||
s.append(",lang=").append(md.language() == null ? "EN" : UTF8.String(md.language()));
|
||||
s.append(",llocal=").append(md.llocal());
|
||||
s.append(",lother=").append(md.lother());
|
||||
s.append(",limage=").append(md.limage());
|
||||
s.append(",laudio=").append(md.laudio());
|
||||
s.append(",lvideo=").append(md.lvideo());
|
||||
s.append(",lapp=").append(md.lapp());
|
||||
if (md.word() != null) {
|
||||
// append also word properties
|
||||
final String wprop = md.word().toPropertyForm();
|
||||
s.append(",wi=").append(Base64Order.enhancedCoder.encodeString(wprop));
|
||||
}
|
||||
return s;
|
||||
} catch (final Throwable e) {
|
||||
ConcurrentLog.logException(e);
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @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>
|
||||
*/
|
||||
@Override
|
||||
public String toString() {
|
||||
final StringBuilder core = corePropList(this);
|
||||
if (core == null) return null;
|
||||
|
||||
core.insert(0, "{");
|
||||
core.append("}");
|
||||
|
||||
return core.toString();
|
||||
//return "{" + core + "}";
|
||||
}
|
||||
|
||||
private class Components {
|
||||
private DigestURL url;
|
||||
private String urlRaw;
|
||||
private byte[] urlHash;
|
||||
private final String dc_title, dc_creator, dc_subject, dc_publisher;
|
||||
private String latlon; // a comma-separated tuple as "<latitude>,<longitude>" where the coordinates are given as WGS84 spatial coordinates in decimal degrees
|
||||
|
||||
private Components(
|
||||
final String urlRaw,
|
||||
final byte[] urlhash,
|
||||
final String title,
|
||||
final String author,
|
||||
final String tags,
|
||||
final String publisher,
|
||||
final String latlon) {
|
||||
this.url = null;
|
||||
this.urlRaw = urlRaw;
|
||||
this.urlHash = urlhash;
|
||||
this.dc_title = title;
|
||||
this.dc_creator = author;
|
||||
this.dc_subject = tags;
|
||||
this.dc_publisher = publisher;
|
||||
this.latlon = latlon;
|
||||
}
|
||||
private DigestURL url() {
|
||||
if (this.url == null) {
|
||||
try {
|
||||
this.url = new DigestURL(this.urlRaw, this.urlHash);
|
||||
} catch (final MalformedURLException e) {
|
||||
this.url = null;
|
||||
}
|
||||
this.urlRaw = null;
|
||||
this.urlHash = null;
|
||||
}
|
||||
return this.url;
|
||||
}
|
||||
private String dc_title() { return this.dc_title; }
|
||||
private String dc_creator() { return this.dc_creator; }
|
||||
private String dc_publisher() { return this.dc_publisher; }
|
||||
private String dc_subject() { return this.dc_subject; }
|
||||
private double lat() {
|
||||
if (this.latlon == null || this.latlon.isEmpty()) return 0.0d;
|
||||
final int p = this.latlon.indexOf(',');
|
||||
if (p < 0) return 0.0d;
|
||||
try {
|
||||
double lat = this.latlon.charAt(0) > '9' ? 0.0d : Double.parseDouble(this.latlon.substring(0, p));
|
||||
if (lat >= -90.0d && lat <= 90.0d) return lat;
|
||||
this.latlon = null; // wrong value
|
||||
return 0.0d;
|
||||
} catch (final NumberFormatException e) {
|
||||
return 0.0d;
|
||||
}
|
||||
}
|
||||
private double lon() {
|
||||
if (this.latlon == null || this.latlon.isEmpty()) return 0.0d;
|
||||
final int p = this.latlon.indexOf(',');
|
||||
if (p < 0 || p == this.latlon.length() - 1) return 0.0d;
|
||||
try {
|
||||
double lon = this.latlon.charAt(p + 1) > '9' ? 0.0d : Double.parseDouble(this.latlon.substring(p + 1));
|
||||
if (lon >= -180.0d && lon <= 180.0d) return lon;
|
||||
this.latlon = null; // wrong value
|
||||
return 0.0d;
|
||||
} catch (final NumberFormatException e) {
|
||||
return 0.0d;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in new issue