boxtec
/
yacy_search_server
mirror of https://github.com/yacy/yacy_search_server
4
1
Fork 0
Code Issues Projects Releases Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from '25f9c35033'
${ noResults }
yacy_search_server/source/net/yacy/kelondro/data/meta/URIMetadataRow.java

542 lines
23 KiB
Raw Blame History

// URLMetadataRow.java
// (C) 2006 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
// first published 2006 on http://www.anomic.de
//
// This is a part of YaCy, a peer-to-peer based web search engine
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
// LICENSE
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
package net.yacy.kelondro.data.meta;
import java.net.MalformedURLException;
import java.text.ParseException;
import java.util.Date;
import java.util.List;
import java.util.Properties;
import java.util.regex.Pattern;
import net.yacy.cora.date.GenericFormatter;
import net.yacy.cora.document.encoding.ASCII;
import net.yacy.cora.document.encoding.UTF8;
import net.yacy.cora.document.id.DigestURL;
import net.yacy.cora.lod.vocabulary.Tagging;
import net.yacy.cora.order.Base64Order;
import net.yacy.cora.order.Digest;
import net.yacy.cora.order.NaturalOrder;
import net.yacy.cora.util.ByteBuffer;
import net.yacy.cora.util.ConcurrentLog;
import net.yacy.crawler.retrieval.Request;
import net.yacy.kelondro.data.word.WordReference;
import net.yacy.kelondro.data.word.WordReferenceRow;
import net.yacy.kelondro.data.word.WordReferenceVars;
import net.yacy.kelondro.index.Row;
import net.yacy.kelondro.io.CharBuffer;
import net.yacy.kelondro.util.Bitfield;
import net.yacy.kelondro.util.MapTools;
import net.yacy.kelondro.util.kelondroException;
import net.yacy.search.query.QueryParams;
import net.yacy.utils.crypt;
public class URIMetadataRow {
// this object stores attributes for URL entries
public static final Row rowdef = new Row(
"String hash-12, " + // the url's hash
"String comp-360, " + // components: the url, description, author, tags and publisher
"Cardinal mod-4 {b256}, " + // last-modified from the httpd
"Cardinal load-4 {b256}, " + // time when the url was loaded
"Cardinal fresh-4 {b256}, " + // time until this url is fresh
"String referrer-12, " + // (one of) the url's referrer hash(es)
"byte[] md5-8, " + // the md5 of the url content (to identify changes)
"Cardinal size-6 {b256}, " + // size of file in bytes
"Cardinal wc-3 {b256}, " + // size of file by number of words; for video and audio: seconds
"byte[] dt-1, " + // doctype, taken from extension or any other heuristic
"Bitfield flags-4, " + // flags; any stuff (see Word-Entity definition)
"byte[] lang-2, " + // language
"Cardinal llocal-2 {b256}, " + // # of outlinks to same domain; for video and image: width
"Cardinal lother-2 {b256}, " + // # of outlinks to outside domain; for video and image: height
"Cardinal limage-2 {b256}, " + // # of embedded image links
"Cardinal laudio-2 {b256}, " + // # of embedded audio links; for audio: track number; for video: number of audio tracks
"Cardinal lvideo-2 {b256}, " + // # of embedded video links
"Cardinal lapp-2 {b256}", // # of embedded links to applications
Base64Order.enhancedCoder
);
/* ===========================================================================
* Constants to access the various columns of an URL entry
* =========================================================================== */
private static final int col_hash = 0; // the url's hash
private static final int col_comp = 1; // components: the url, description, author and tags. As 5th element, an ETag is possible
private static final int col_mod = 2; // the modifed-date time from the server (servertime in row)
private static final int col_load = 3; // time when the url was loaded
private static final int col_fresh = 4; // time until this url is fresh
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)
private static final int col_md5 = 6; // the md5 of the url content (to identify changes)
private static final int col_size = 7; // size of file in bytes
private static final int col_wc = 8; // size of file by number of words; for video and audio: seconds
private static final int col_dt = 9; // doctype, taken from extension or any other heuristic
private static final int col_flags = 10; // flags; any stuff (see Word-Entity definition)
private static final int col_lang = 11; // language
private static final int col_llocal = 12; // # of outlinks to same domain; for video and image: width
private static final int col_lother = 13; // # of outlinks to outside domain; for video and image: height
private static final int col_limage = 14; // # of embedded image links
private static final int col_laudio = 15; // # of embedded audio links; for audio: track number; for video: number of audio tracks
private static final int col_lvideo = 16; // # of embedded video links
private static final int col_lapp = 17; // # of embedded links to applications
private final Row.Entry entry;
private final String snippet;
private WordReference word; // this is only used if the url is transported via remote search requests
private Components comp;
public URIMetadataRow(final Row.Entry entry, final WordReference searchedWord) {
this.entry = entry;
this.snippet = "";
this.word = searchedWord;
this.comp = null;
}
private URIMetadataRow(final Properties prop) throws kelondroException {
// generates an plasmaLURLEntry using the properties from the argument
// the property names must correspond to the one from toString
//System.out.println("DEBUG-ENTRY: prop=" + prop.toString());
DigestURL url;
String urls = crypt.simpleDecode(prop.getProperty("url", ""));
try {
url = new DigestURL(urls);
} catch (final MalformedURLException e) {
throw new kelondroException("bad url: " + urls);
}
String descr = crypt.simpleDecode(prop.getProperty("descr", "")); if (descr == null) descr = "";
String dc_creator = crypt.simpleDecode(prop.getProperty("author", "")); if (dc_creator == null) dc_creator = "";
String tags = crypt.simpleDecode(prop.getProperty("tags", "")); if (tags == null) tags = "";
tags = Tagging.cleanTagFromAutotagging(tags);
String dc_publisher = crypt.simpleDecode(prop.getProperty("publisher", "")); if (dc_publisher == null) dc_publisher = "";
String lons = crypt.simpleDecode(prop.getProperty("lon", "0.0")); if (lons == null) lons = "0.0";
String lats = crypt.simpleDecode(prop.getProperty("lat", "0.0")); if (lats == null) lats = "0.0";
this.entry = rowdef.newEntry();
this.entry.setCol(col_hash, url.hash()); // FIXME potential null pointer access
this.entry.setCol(col_comp, encodeComp(url, descr, dc_creator, tags, dc_publisher, Float.parseFloat(lats), Float.parseFloat(lons)));
// create new formatters to make concurrency possible
final GenericFormatter formatter = new GenericFormatter(GenericFormatter.FORMAT_SHORT_DAY, GenericFormatter.time_minute);
try {
encodeDate(col_mod, formatter.parse(prop.getProperty("mod", "20000101")));
} catch (final ParseException e) {
encodeDate(col_mod, new Date());
}
try {
encodeDate(col_load, formatter.parse(prop.getProperty("load", "20000101")));
} catch (final ParseException e) {
encodeDate(col_load, new Date());
}
try {
encodeDate(col_fresh, formatter.parse(prop.getProperty("fresh", "20000101")));
} catch (final ParseException e) {
encodeDate(col_fresh, new Date());
}
this.entry.setCol(col_referrer, UTF8.getBytes(prop.getProperty("referrer", "")));
this.entry.setCol(col_md5, Digest.decodeHex(prop.getProperty("md5", "")));
this.entry.setCol(col_size, Integer.parseInt(prop.getProperty("size", "0")));
this.entry.setCol(col_wc, Integer.parseInt(prop.getProperty("wc", "0")));
final String dt = prop.getProperty("dt", "t");
this.entry.setCol(col_dt, dt.isEmpty() ? new byte[]{(byte) 't'} : new byte[]{(byte) dt.charAt(0)});
final String flags = prop.getProperty("flags", "AAAAAA");
this.entry.setCol(col_flags, (flags.length() > 6) ? QueryParams.empty_constraint.bytes() : (new Bitfield(4, flags)).bytes());
this.entry.setCol(col_lang, UTF8.getBytes(prop.getProperty("lang", "")));
this.entry.setCol(col_llocal, Integer.parseInt(prop.getProperty("llocal", "0")));
this.entry.setCol(col_lother, Integer.parseInt(prop.getProperty("lother", "0")));
this.entry.setCol(col_limage, Integer.parseInt(prop.getProperty("limage", "0")));
this.entry.setCol(col_laudio, Integer.parseInt(prop.getProperty("laudio", "0")));
this.entry.setCol(col_lvideo, Integer.parseInt(prop.getProperty("lvideo", "0")));
this.entry.setCol(col_lapp, Integer.parseInt(prop.getProperty("lapp", "0")));
this.snippet = crypt.simpleDecode(prop.getProperty("snippet", ""));
this.word = null;
if (prop.containsKey("wi")) {
this.word = new WordReferenceVars(new WordReferenceRow(Base64Order.enhancedCoder.decodeString(prop.getProperty("wi", ""))), false);
}
this.comp = null;
}
public static URIMetadataRow importEntry(final String propStr) {
if (propStr == null || propStr.isEmpty() || propStr.charAt(0) != '{' || !propStr.endsWith("}")) {
ConcurrentLog.severe("URIMetadataRow", "importEntry: propStr is not proper: " + propStr);
return null;
}
try {
return new URIMetadataRow(MapTools.s2p(propStr.substring(1, propStr.length() - 1)));
} catch (final kelondroException e) {
// wrong format
ConcurrentLog.severe("URIMetadataRow", e.getMessage());
return null;
}
}
private void encodeDate(final int col, final Date d) {
// calculates the number of days since 1.1.1970 and returns this as 4-byte array
// 86400000 is the number of milliseconds in one day
long time = d.getTime();
long now = System.currentTimeMillis();
this.entry.setCol(col, NaturalOrder.encodeLong((time > now ? now : time) / 86400000L, 4));
}
private Date decodeDate(final int col) {
final long t = this.entry.getColLong(col);
/*if (t < 14600) */return new Date(86400000L * t); // time was stored as number of days since epoch
/*
if (t < 350400) return new Date(3600000L * t); // hours since epoch
if (t < 21024000) return new Date(60000L * t); // minutes since epoch
*/
}
private static byte[] encodeComp(
final DigestURL url,
final String dc_title,
final String dc_creator,
final String dc_subject,
final String dc_publisher,
final double lat,
final double lon) {
final CharBuffer s = new CharBuffer(3600, 360);
s.append(url.toNormalform(true)).appendLF();
s.append(dc_title).appendLF();
if (dc_creator.length() > 80) s.append(dc_creator, 0, 80); else s.append(dc_creator);
s.appendLF();
if (dc_subject.length() > 120) s.append(dc_subject, 0, 120); else s.append(dc_subject);
s.appendLF();
if (dc_publisher.length() > 80) s.append(dc_publisher, 0, 80); else s.append(dc_publisher);
s.appendLF();
if (lon == 0.0 && lat == 0.0) s.appendLF(); else s.append(Double.toString(lat)).append(',').append(Double.toString(lon)).appendLF();
String s0 = s.toString();
s.close();
return UTF8.getBytes(s0);
}
public byte[] hash() {
// return a url-hash, based on the md5 algorithm
// the result is a String of 12 bytes within a 72-bit space
// (each byte has an 6-bit range)
// that should be enough for all web pages on the world
final byte[] h = this.entry.getPrimaryKeyBytes();
return h;
}
private String hostHash = null;
public String hosthash() {
if (this.hostHash != null) return this.hostHash;
this.hostHash = ASCII.String(this.entry.getPrimaryKeyBytes(), 6, 6);
return this.hostHash;
}
public boolean matches(final Pattern matcher) {
return this.metadata().matches(matcher);
}
public DigestURL url() {
return this.metadata().url();
}
public String dc_title() {
return this.metadata().dc_title();
}
public String dc_creator() {
return this.metadata().dc_creator();
}
public String dc_publisher() {
return this.metadata().dc_publisher();
}
public String dc_subject() {
return this.metadata().dc_subject();
}
public double lat() {
return this.metadata().lat();
}
public double lon() {
return this.metadata().lon();
}
private Components metadata() {
// avoid double computation of metadata elements
if (this.comp != null) return this.comp;
// parse elements from comp field;
final byte[] c = this.entry.getColBytes(col_comp, true);
final List<byte[]> cl = ByteBuffer.split(c, (byte) 10);
this.comp = new Components(
(cl.size() > 0) ? UTF8.String(cl.get(0)) : "",
hash(),
(cl.size() > 1) ? UTF8.String(cl.get(1)) : "",
(cl.size() > 2) ? UTF8.String(cl.get(2)) : "",
(cl.size() > 3) ? UTF8.String(cl.get(3)) : "",
(cl.size() > 4) ? UTF8.String(cl.get(4)) : "",
(cl.size() > 5) ? UTF8.String(cl.get(5)) : "");
return this.comp;
}
public Date moddate() {
return decodeDate(col_mod);
}
public Date loaddate() {
return decodeDate(col_load);
}
public Date freshdate() {
return decodeDate(col_fresh);
}
public byte[] referrerHash() {
// return the creator's hash or null if there is none
// FIXME: There seem to be some malformed entries in the databasees like "null\0\0\0\0\0\0\0\0"
final byte[] r = this.entry.getColBytes(col_referrer, true);
if (r != null) {
int i = r.length;
while (i > 0) {
if (r[--i] == 0) return null;
}
}
return r;
}
public String md5() {
// returns the md5 in hex representation
return Digest.encodeHex(this.entry.getColBytes(col_md5, true));
}
public char doctype() {
return (char) this.entry.getColByte(col_dt);
}
public byte[] language() {
byte[] b = this.entry.getColBytes(col_lang, true);
if ((b == null || b[0] == (byte)'[') && this.metadata().url != null) {
String lang = this.metadata().url.language(); // calculate lang by TLD
this.entry.setCol(col_lang, UTF8.getBytes(lang)); //remember calculation
return ASCII.getBytes(lang);
}
return b;
}
public int size() {
return (int) this.entry.getColLong(col_size);
}
public Bitfield flags() {
return new Bitfield(this.entry.getColBytes(col_flags, true));
}
public int wordCount() {
return (int) this.entry.getColLong(col_wc);
}
public int llocal() {
return (int) this.entry.getColLong(col_llocal);
}
public int lother() {
return (int) this.entry.getColLong(col_lother);
}
public int limage() {
return (int) this.entry.getColLong(col_limage);
}
public int laudio() {
return (int) this.entry.getColLong(col_laudio);
}
public int lvideo() {
return (int) this.entry.getColLong(col_lvideo);
}
public int lapp() {
return (int) this.entry.getColLong(col_lapp);
}
public String snippet() {
// the snippet may appear here if the url was transported in a remote search
// it will not be saved anywhere, but can only be requested here
return this.snippet;
}
public WordReference word() {
return this.word;
}
private static StringBuilder corePropList(URIMetadataRow md) {
// generate a parseable string; this is a simple property-list
final StringBuilder s = new StringBuilder(300);
// create new formatters to make concurrency possible
final GenericFormatter formatter = new GenericFormatter(GenericFormatter.FORMAT_SHORT_DAY, GenericFormatter.time_minute);
try {
s.append("hash=").append(ASCII.String(md.hash()));
s.append(",url=").append(crypt.simpleEncode(md.url().toNormalform(true)));
s.append(",descr=").append(crypt.simpleEncode(md.dc_title()));
s.append(",author=").append(crypt.simpleEncode(md.dc_creator()));
s.append(",tags=").append(crypt.simpleEncode(Tagging.cleanTagFromAutotagging(md.dc_subject())));
s.append(",publisher=").append(crypt.simpleEncode(md.dc_publisher()));
s.append(",lat=").append(md.lat());
s.append(",lon=").append(md.lon());
s.append(",mod=").append(formatter.format(md.moddate()));
s.append(",load=").append(formatter.format(md.loaddate()));
s.append(",fresh=").append(formatter.format(md.freshdate()));
s.append(",referrer=").append(md.referrerHash() == null ? "" : ASCII.String(md.referrerHash()));
s.append(",md5=").append(md.md5());
s.append(",size=").append(md.size());
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;
}
}
public Request toBalancerEntry(final String initiatorHash) {
return new Request(
ASCII.getBytes(initiatorHash),
metadata().url(),
referrerHash(),
metadata().dc_title(),
moddate(),
null,
0,
0,
0,
0);
}
/**
* @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
public 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;
}
public boolean matches(final Pattern matcher) {
if (this.urlRaw != null) return matcher.matcher(this.urlRaw.toLowerCase()).matches();
if (this.url != null) return matcher.matcher(this.url.toNormalform(true).toLowerCase()).matches();
return false;
}
public 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;
}
public String dc_title() { return this.dc_title; }
public String dc_creator() { return this.dc_creator; }
public String dc_publisher() { return this.dc_publisher; }
public String dc_subject() { return this.dc_subject; }
public 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;
}
}
public double lon() {
if (this.latlon == null || this.latlon.isEmpty()) return 0.0d;
final int p = this.latlon.indexOf(',');
if (p < 0) 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;
}
}
}
}
Reference in new issue View Git Blame Copy Permalink