mirror of
https://github.com/yacy/yacy_search_server.git
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788288eb9e
The default schema uses only some of them and the resting search index has now the following properties: - webgraph size will have about 40 times as much entries as default index - the complete index size will increase and may be about the double size of current amount As testing showed, not much indexing performance is lost. The default index will be smaller (moved fields out of it); thus searching can be faster. The new index will cause that some old parts in YaCy can be removed, i.e. specialized webgraph data and the noload crawler. The new index will make it possible to: - search within link texts of linked but not indexed documents (about 20 times of document index in size!!) - get a very detailed link graph - enhance ranking using a complete link graph To get the full access to the new index, the API to solr has now two access points: one with attribute core=collection1 for the default search index and core=webgraph to the new webgraph search index. This is also avaiable for p2p operation but client access is not yet implemented.
319 lines
12 KiB
Java
319 lines
12 KiB
Java
/**
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* htmlParser.java
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* Copyright 2009 by Michael Peter Christen, mc@yacy.net, Frankfurt am Main, Germany
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* First released 09.07.2009 at http://yacy.net
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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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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.yacy.document.parser;
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import java.io.BufferedInputStream;
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import java.io.ByteArrayInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.MalformedURLException;
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import java.nio.charset.Charset;
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import java.nio.charset.IllegalCharsetNameException;
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import java.nio.charset.UnsupportedCharsetException;
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import java.util.regex.Pattern;
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import net.yacy.cora.protocol.ClientIdentification;
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import net.yacy.document.AbstractParser;
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import net.yacy.document.Document;
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import net.yacy.document.Parser;
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import net.yacy.document.parser.html.CharacterCoding;
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import net.yacy.document.parser.html.ContentScraper;
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import net.yacy.document.parser.html.ScraperInputStream;
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import net.yacy.document.parser.html.TransformerWriter;
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import net.yacy.kelondro.data.meta.DigestURI;
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import net.yacy.kelondro.util.FileUtils;
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import com.ibm.icu.text.CharsetDetector;
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public class htmlParser extends AbstractParser implements Parser {
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private static final Pattern patternUnderline = Pattern.compile("_");
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private static final int maxLinks = 1000;
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public htmlParser() {
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super("Streaming HTML Parser");
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this.SUPPORTED_EXTENSIONS.add("htm");
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this.SUPPORTED_EXTENSIONS.add("html");
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this.SUPPORTED_EXTENSIONS.add("phtml");
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this.SUPPORTED_EXTENSIONS.add("shtml");
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this.SUPPORTED_EXTENSIONS.add("xhtml");
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this.SUPPORTED_EXTENSIONS.add("php");
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this.SUPPORTED_EXTENSIONS.add("php3");
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this.SUPPORTED_EXTENSIONS.add("php4");
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this.SUPPORTED_EXTENSIONS.add("php5");
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this.SUPPORTED_EXTENSIONS.add("cfm");
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this.SUPPORTED_EXTENSIONS.add("asp");
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this.SUPPORTED_EXTENSIONS.add("aspx");
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this.SUPPORTED_EXTENSIONS.add("tex");
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this.SUPPORTED_EXTENSIONS.add("txt");
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//SUPPORTED_EXTENSIONS.add("js");
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this.SUPPORTED_EXTENSIONS.add("jsp");
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this.SUPPORTED_EXTENSIONS.add("mf");
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this.SUPPORTED_EXTENSIONS.add("pl");
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this.SUPPORTED_EXTENSIONS.add("py");
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this.SUPPORTED_MIME_TYPES.add("text/html");
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this.SUPPORTED_MIME_TYPES.add("text/xhtml+xml");
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this.SUPPORTED_MIME_TYPES.add("application/xhtml+xml");
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this.SUPPORTED_MIME_TYPES.add("application/x-httpd-php");
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this.SUPPORTED_MIME_TYPES.add("application/x-tex");
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this.SUPPORTED_MIME_TYPES.add("text/plain");
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this.SUPPORTED_MIME_TYPES.add("text/sgml");
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this.SUPPORTED_MIME_TYPES.add("text/csv");
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}
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@Override
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public Document[] parse(
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final DigestURI location,
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final String mimeType,
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final String documentCharset,
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final InputStream sourceStream) throws Parser.Failure, InterruptedException {
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try {
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// first get a document from the parsed html
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final ContentScraper scraper = parseToScraper(location, documentCharset, sourceStream, maxLinks);
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final Document document = transformScraper(location, mimeType, documentCharset, scraper);
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return new Document[]{document};
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} catch (final IOException e) {
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throw new Parser.Failure("IOException in htmlParser: " + e.getMessage(), location);
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}
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}
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/**
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* the transformScraper method transforms a scraper object into a document object
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* @param location
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* @param mimeType
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* @param charSet
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* @param scraper
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* @return
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*/
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private static Document transformScraper(final DigestURI location, final String mimeType, final String charSet, final ContentScraper scraper) {
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final String[] sections = new String[
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scraper.getHeadlines(1).length +
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scraper.getHeadlines(2).length +
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scraper.getHeadlines(3).length +
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scraper.getHeadlines(4).length +
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scraper.getHeadlines(5).length +
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scraper.getHeadlines(6).length];
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int p = 0;
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for (int i = 1; i <= 6; i++) {
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for (final String headline : scraper.getHeadlines(i)) {
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sections[p++] = headline;
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}
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}
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final Document ppd = new Document(
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location,
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mimeType,
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charSet,
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scraper,
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scraper.getContentLanguages(),
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scraper.getKeywords(),
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scraper.getTitles(),
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scraper.getAuthor(),
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scraper.getPublisher(),
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sections,
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scraper.getDescription(),
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scraper.getLon(), scraper.getLat(),
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scraper.getText(),
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scraper.getAnchors(),
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scraper.getRSS(),
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scraper.getImages(),
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scraper.indexingDenied());
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ppd.setFavicon(scraper.getFavicon());
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return ppd;
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}
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public static ContentScraper parseToScraper(
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final DigestURI location,
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final String documentCharset,
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InputStream sourceStream,
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final int maxLinks) throws Parser.Failure, IOException {
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// make a scraper
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String charset = null;
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// ah, we are lucky, we got a character-encoding via HTTP-header
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if (documentCharset != null) {
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charset = patchCharsetEncoding(documentCharset);
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}
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// nothing found: try to find a meta-tag
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if (charset == null) {
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try {
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final ScraperInputStream htmlFilter = new ScraperInputStream(sourceStream, documentCharset, location, null, false, maxLinks);
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sourceStream = htmlFilter;
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charset = htmlFilter.detectCharset();
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htmlFilter.close();
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} catch (final IOException e1) {
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throw new Parser.Failure("Charset error:" + e1.getMessage(), location);
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}
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}
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// the author didn't tell us the encoding, try the mozilla-heuristic
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if (charset == null) {
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final CharsetDetector det = new CharsetDetector();
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det.enableInputFilter(true);
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final InputStream detStream = new BufferedInputStream(sourceStream);
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det.setText(detStream);
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charset = det.detect().getName();
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sourceStream = detStream;
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}
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// wtf? still nothing, just take system-standard
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if (charset == null) {
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charset = Charset.defaultCharset().name();
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}
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Charset c;
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try {
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c = Charset.forName(charset);
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} catch (final IllegalCharsetNameException e) {
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c = Charset.defaultCharset();
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} catch (final UnsupportedCharsetException e) {
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c = Charset.defaultCharset();
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}
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// parsing the content
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final ContentScraper scraper = new ContentScraper(location, maxLinks);
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final TransformerWriter writer = new TransformerWriter(null,null,scraper,null,false, Math.max(64, Math.min(4096, sourceStream.available())));
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try {
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FileUtils.copy(sourceStream, writer, c);
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} catch (final IOException e) {
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throw new Parser.Failure("IO error:" + e.getMessage(), location);
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} finally {
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writer.flush();
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sourceStream.close();
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writer.close();
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}
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//OutputStream hfos = new htmlFilterOutputStream(null, scraper, null, false);
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//serverFileUtils.copy(sourceFile, hfos);
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//hfos.close();
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if (writer.binarySuspect()) {
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final String errorMsg = "Binary data found in resource";
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throw new Parser.Failure(errorMsg, location);
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}
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return scraper;
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}
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/**
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* some html authors use wrong encoding names, either because they don't know exactly what they
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* are doing or they produce a type. Many times, the upper/downcase scheme of the name is fuzzy
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* This method patches wrong encoding names. The correct names are taken from
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* http://www.iana.org/assignments/character-sets
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* @param encoding
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* @return patched encoding name
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*/
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public static String patchCharsetEncoding(String encoding) {
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// do nothing with null
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if ((encoding == null) || (encoding.length() < 3)) return null;
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// trim encoding string
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encoding = encoding.trim();
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// fix upper/lowercase
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encoding = encoding.toUpperCase();
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if (encoding.startsWith("SHIFT")) return "Shift_JIS";
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if (encoding.startsWith("BIG")) return "Big5";
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// all other names but such with "windows" use uppercase
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if (encoding.startsWith("WINDOWS")) encoding = "windows" + encoding.substring(7);
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if (encoding.startsWith("MACINTOSH")) encoding = "MacRoman";
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// fix wrong fill characters
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encoding = patternUnderline.matcher(encoding).replaceAll("-");
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if (encoding.matches("GB[_-]?2312([-_]80)?")) return "GB2312";
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if (encoding.matches(".*UTF[-_]?8.*")) return "UTF-8";
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if (encoding.startsWith("US")) return "US-ASCII";
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if (encoding.startsWith("KOI")) return "KOI8-R";
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// patch missing '-'
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if (encoding.startsWith("windows") && encoding.length() > 7) {
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final char c = encoding.charAt(7);
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if ((c >= '0') && (c <= '9')) {
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encoding = "windows-" + encoding.substring(7);
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}
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}
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if (encoding.startsWith("ISO")) {
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// patch typos
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if (encoding.length() > 3) {
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final char c = encoding.charAt(3);
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if ((c >= '0') && (c <= '9')) {
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encoding = "ISO-" + encoding.substring(3);
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}
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}
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if (encoding.length() > 8) {
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final char c = encoding.charAt(8);
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if ((c >= '0') && (c <= '9')) {
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encoding = encoding.substring(0, 8) + "-" + encoding.substring(8);
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}
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}
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}
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// patch wrong name
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if (encoding.startsWith("ISO-8559")) {
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// popular typo
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encoding = "ISO-8859" + encoding.substring(8);
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}
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// converting cp\d{4} -> windows-\d{4}
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if (encoding.matches("CP([_-])?125[0-8]")) {
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final char c = encoding.charAt(2);
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if ((c >= '0') && (c <= '9')) {
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encoding = "windows-" + encoding.substring(2);
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} else {
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encoding = "windows" + encoding.substring(2);
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}
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}
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return encoding;
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}
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public static void main(final String[] args) {
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// test parsing of a url
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DigestURI url;
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try {
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url = new DigestURI(args[0]);
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final byte[] content = url.get(ClientIdentification.getUserAgent(), 3000);
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final Document[] document = new htmlParser().parse(url, "text/html", null, new ByteArrayInputStream(content));
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final String title = document[0].dc_title();
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System.out.println(title);
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System.out.println(CharacterCoding.unicode2html(title, false));
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} catch (final MalformedURLException e) {
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e.printStackTrace();
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} catch (final IOException e) {
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e.printStackTrace();
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} catch (final Parser.Failure e) {
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e.printStackTrace();
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} catch (final InterruptedException e) {
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e.printStackTrace();
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}
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}
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}
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