// plasmaIndexEntry.java // ----------------------- // part of YaCy // (C) by Michael Peter Christen; mc@anomic.de // first published on http://www.anomic.de // Frankfurt, Germany, 2004 // last major change: 01.06.2004 // // 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 // // Using this software in any meaning (reading, learning, copying, compiling, // running) means that you agree that the Author(s) is (are) not responsible // for cost, loss of data or any harm that may be caused directly or indirectly // by usage of this softare or this documentation. The usage of this software // is on your own risk. The installation and usage (starting/running) of this // software may allow other people or application to access your computer and // any attached devices and is highly dependent on the configuration of the // software which must be done by the user of the software; the author(s) is // (are) also not responsible for proper configuration and usage of the // software, even if provoked by documentation provided together with // the software. // // Any changes to this file according to the GPL as documented in the file // gpl.txt aside this file in the shipment you received can be done to the // lines that follows this copyright notice here, but changes must not be // done inside the copyright notive above. A re-distribution must contain // the intact and unchanged copyright notice. // Contributions and changes to the program code must be marked as such. /* This class defines the structures of an index entry */ package de.anomic.plasma; import java.net.URL; import java.util.Properties; import de.anomic.server.serverCodings; import de.anomic.yacy.yacySeedDB; import de.anomic.htmlFilter.htmlFilterContentScraper; public class plasmaWordIndexEntry { // an wordEntry can be filled in either of two ways: // by the discrete values of the entry // or by the encoded entry-string // the size of a word hash public static final int wordHashLength = yacySeedDB.commonHashLength; // 12 public static final int urlHashLength = yacySeedDB.commonHashLength; // 12 // the size of the index entry attributes public static final int attrSpaceShort = 12; public static final int attrSpaceLong = 18; // the associated hash private String urlHash; // discrete values private int count; // words in file private int posintext; // first position of the word in text as number of word; 0=unknown or irrelevant position private int posinphrase; // position within a phrase of the word private int posofphrase; // position of the phrase in the text as count of sentences; 0=unknown; 1=path; 2=keywords; 3=headline; >4: in text private int age; // calculated by using last-modified private int quality; // result of a heuristic on the source file private byte[] language; // essentially the country code (the TLD as heuristic), two letters lowercase only private char doctype; // type of source private char localflag; // indicates if the index was created locally // some doctypes: public static final char DT_PDFPS = 'p'; public static final char DT_TEXT = 't'; public static final char DT_HTML = 'h'; public static final char DT_DOC = 'd'; public static final char DT_IMAGE = 'i'; public static final char DT_MOVIE = 'm'; public static final char DT_FLASH = 'f'; public static final char DT_SHARE = 's'; public static final char DT_AUDIO = 'a'; public static final char DT_BINARY = 'b'; public static final char DT_UNKNOWN = 'u'; // local flag attributes public static final char LT_LOCAL = 'L'; public static final char LT_GLOBAL = 'G'; // create a word hash public static String word2hash(String word) { return serverCodings.encodeMD5B64(word.toLowerCase(), true).substring(0, wordHashLength); } // doctype calculation public static char docType(URL url) { String path = htmlFilterContentScraper.urlNormalform(url); char doctype = DT_UNKNOWN; if (path.endsWith(".gif")) doctype = DT_IMAGE; if (path.endsWith(".jpg")) doctype = DT_IMAGE; if (path.endsWith(".jpeg")) doctype = DT_IMAGE; if (path.endsWith(".png")) doctype = DT_IMAGE; if (path.endsWith(".html")) doctype = DT_HTML; if (path.endsWith(".txt")) doctype = DT_TEXT; if (path.endsWith(".doc")) doctype = DT_DOC; if (path.endsWith(".rtf")) doctype = DT_DOC; if (path.endsWith(".pdf")) doctype = DT_PDFPS; if (path.endsWith(".ps")) doctype = DT_PDFPS; if (path.endsWith(".avi")) doctype = DT_MOVIE; if (path.endsWith(".mov")) doctype = DT_MOVIE; if (path.endsWith(".qt")) doctype = DT_MOVIE; if (path.endsWith(".mpg")) doctype = DT_MOVIE; if (path.endsWith(".md5")) doctype = DT_SHARE; if (path.endsWith(".mpeg")) doctype = DT_MOVIE; if (path.endsWith(".asf")) doctype = DT_FLASH; return doctype; } public static char docType(String mime) { char doctype = DT_UNKNOWN; if (mime.endsWith("/jpeg")) doctype = DT_IMAGE; if (mime.endsWith("/rtf")) doctype = DT_DOC; if (mime.endsWith("/msword")) doctype = DT_DOC; if (mime.endsWith("/mspowerpoint")) doctype = DT_DOC; if (mime.endsWith("/postscript")) doctype = DT_PDFPS; if (mime.endsWith("/pdf")) doctype = DT_PDFPS; if (mime.endsWith("/octet-stream")) doctype = DT_BINARY; if (mime.endsWith("/x-shockwave-flash")) doctype = DT_FLASH; if (mime.startsWith("audio/")) doctype = DT_AUDIO; if (mime.startsWith("video/")) doctype = DT_MOVIE; if (mime.startsWith("text/")) doctype = DT_TEXT; if (mime.startsWith("image/")) doctype = DT_IMAGE; if (mime.endsWith("/html")) doctype = DT_HTML; //bz2 = application/x-bzip2 //dvi = application/x-dvi //gz = application/gzip //hqx = application/mac-binhex40 //lha = application/x-lzh //lzh = application/x-lzh //pac = application/x-ns-proxy-autoconfig //php = application/x-httpd-php //phtml = application/x-httpd-php //rss = application/xml //tar = application/tar //tex = application/x-tex //tgz = application/tar //torrent = application/x-bittorrent //xhtml = application/xhtml+xml //xla = application/msexcel //xls = application/msexcel //xsl = application/xml //xml = application/xml //Z = application/x-compress //zip = application/zip return doctype; } // language calculation public static String language(URL url) { String host = url.getHost(); int pos = host.lastIndexOf("."); String language = "uk"; if ((pos > 0) && (host.length() - pos == 3)) language = host.substring(pos + 1).toLowerCase(); return language; } // the class instantiation can only be done by a plasmaStore method // therefore they are all public public plasmaWordIndexEntry(String urlHash, int count, int posintext, int posinphrase, int posofphraseint, int virtualage, int quality, String language, char doctype, boolean local) { // ** hier fehlt noch als Attribut: , damit 'nearby' getrackt werden kann ** if ((language == null) || (language.length() != plasmaCrawlLURL.urlLanguageLength)) language = "uk"; this.urlHash = urlHash; this.count = count; this.posintext = posintext; this.posinphrase = posinphrase; this.posofphrase = posofphrase; this.age = virtualage; this.quality = quality; this.language = language.getBytes(); this.doctype = doctype; this.localflag = (local) ? LT_LOCAL : LT_GLOBAL; } public plasmaWordIndexEntry(String urlHash, String code) { // the code is not parsed but used later on this.urlHash = urlHash; this.count = (int) serverCodings.enhancedCoder.decodeBase64Long(code.substring(6, 8)); this.posintext = (code.length() >= 14) ? (int) serverCodings.enhancedCoder.decodeBase64Long(code.substring(12, 14)) : 0; this.posinphrase = (code.length() >= 15) ? (int) serverCodings.enhancedCoder.decodeBase64Long(code.substring(14, 16)) : 0; this.posofphrase = (code.length() >= 16) ? (int) serverCodings.enhancedCoder.decodeBase64Long(code.substring(16, 18)) : 0; this.age = (int) serverCodings.enhancedCoder.decodeBase64Long(code.substring(3, 6)); this.quality = (int) serverCodings.enhancedCoder.decodeBase64Long(code.substring(0, 3)); this.language = code.substring(8, 10).getBytes(); this.doctype = code.charAt(10); this.localflag = code.charAt(11); } public plasmaWordIndexEntry(String external) { // parse external form String[] elts = external.substring(1, external.length() - 1).split(","); Properties pr = new Properties(); int p; for (int i = 0; i < elts.length; i++) { pr.put(elts[i].substring(0, (p = elts[i].indexOf("="))), elts[i].substring(p + 1)); } // set values this.urlHash = pr.getProperty("h", ""); this.count = (int) serverCodings.enhancedCoder.decodeBase64Long(pr.getProperty("c", "A")); this.posintext = (int) serverCodings.enhancedCoder.decodeBase64Long(pr.getProperty("t", "__")); this.posinphrase = (int) serverCodings.enhancedCoder.decodeBase64Long(pr.getProperty("r", "__")); this.posofphrase = (int) serverCodings.enhancedCoder.decodeBase64Long(pr.getProperty("o", "__")); this.age = (int) serverCodings.enhancedCoder.decodeBase64Long(pr.getProperty("a", "A")); this.quality = (int) serverCodings.enhancedCoder.decodeBase64Long(pr.getProperty("q", "__")); this.language = pr.getProperty("l", "uk").getBytes(); this.doctype = pr.getProperty("d", "u").charAt(0); this.localflag = pr.getProperty("f", ""+LT_LOCAL).charAt(0); } private String b64save(long x, int l) { try { return serverCodings.enhancedCoder.encodeBase64Long(x, l); } catch (Exception e) { // if x does not fit into l return "________".substring(0, l); } } public String toEncodedForm(boolean longAttr) { // attention: this integrates NOT the URL into the encoding // if you need a complete dump, use toExternalForm() String shortAttr = b64save(quality, plasmaCrawlLURL.urlQualityLength) + b64save(age, 3) + b64save(count, 2) + new String(language) + doctype + localflag; // 3 + 3 + 2 + 2 + 1 + 1 = 12 bytes if (longAttr) return shortAttr + b64save(posintext, 2) + b64save(posinphrase, 2) + b64save(posofphrase, 2); // 12 + 3 + 2 + 2 + 1 + 1 = 12 bytes else return shortAttr; } public String toExternalForm() { return "{" + "h=" + urlHash + ",q=" + b64save(quality, plasmaCrawlLURL.urlQualityLength) + ",a=" + b64save(age, 3) + ",c=" + b64save(count, 2) + ",l=" + new String(language) + ",d=" + doctype + ",f=" + localflag + ",t=" + b64save(posintext, 2) + ",r=" + b64save(posinphrase, 2) + ",o=" + b64save(posofphrase, 2) + "}"; } public String getUrlHash() { return urlHash; } public int getQuality() { return quality; } public int getVirtualAge() { return age; } public int getCount() { return count; } public int posintext() { return posintext; } public int posinphrase() { return posinphrase; } public int posofphrase() { return posofphrase; } public String getLanguage() { return new String(language); } public char getType() { return doctype; } public boolean isLocal() { return localflag == LT_LOCAL; } public static void main(String[] args) { // outputs the word hash to a given word if (args.length != 1) System.exit(0); System.out.println("WORDHASH: " + word2hash(args[0])); } }