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1044 lines
43 KiB
1044 lines
43 KiB
// ContentScraper.java
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// -----------------------------
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// (C) by Michael Peter Christen; mc@yacy.net
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2004
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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 program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package net.yacy.document.parser.html;
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import java.io.ByteArrayInputStream;
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import java.io.CharArrayReader;
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import java.io.File;
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import java.io.IOException;
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import java.io.Writer;
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import java.net.MalformedURLException;
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import java.nio.charset.Charset;
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import java.text.ParseException;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.LinkedHashMap;
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import java.util.LinkedHashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Properties;
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import java.util.Set;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import javax.swing.event.EventListenerList;
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import net.yacy.cora.date.ISO8601Formatter;
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import net.yacy.cora.document.id.AnchorURL;
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import net.yacy.cora.document.id.DigestURL;
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import net.yacy.cora.document.id.MultiProtocolURL;
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import net.yacy.cora.sorting.ClusteredScoreMap;
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import net.yacy.cora.storage.SizeLimitedMap;
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import net.yacy.cora.storage.SizeLimitedSet;
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import net.yacy.cora.util.ConcurrentLog;
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import net.yacy.cora.util.NumberTools;
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import net.yacy.document.SentenceReader;
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import net.yacy.document.parser.htmlParser;
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import net.yacy.document.parser.html.Evaluation.Element;
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import net.yacy.kelondro.io.CharBuffer;
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import net.yacy.kelondro.util.FileUtils;
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import net.yacy.kelondro.util.ISO639;
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public class ContentScraper extends AbstractScraper implements Scraper {
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public static final int MAX_DOCSIZE = 40 * 1024 * 1024;
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private final char degree = '\u00B0';
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private final char[] minuteCharsHTML = "'".toCharArray();
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// statics: for initialization of the HTMLFilterAbstractScraper
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private static final Set<String> linkTags0 = new HashSet<String>(12,0.99f);
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private static final Set<String> linkTags1 = new HashSet<String>(15,0.99f);
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private static final Pattern LB = Pattern.compile("\n");
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public enum TagType {
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singleton, pair;
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}
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public enum Tag {
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html(TagType.singleton), // scraped as singleton to get attached properties like 'lang'
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body(TagType.singleton), // scraped as singleton to get attached properties like 'class'
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div(TagType.singleton), // scraped as singleton to get attached properties like 'id'
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img(TagType.singleton),
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base(TagType.singleton),
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frame(TagType.singleton),
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meta(TagType.singleton),
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area(TagType.singleton),
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link(TagType.singleton),
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embed(TagType.singleton), //added by [MN]
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param(TagType.singleton), //added by [MN]
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iframe(TagType.singleton), // scraped as singleton to get such iframes that have no closing tag
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a(TagType.pair),
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h1(TagType.pair),
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h2(TagType.pair),
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h3(TagType.pair),
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h4(TagType.pair),
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h5(TagType.pair),
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h6(TagType.pair),
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title(TagType.pair),
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b(TagType.pair),
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strong(TagType.pair),
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u(TagType.pair),
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i(TagType.pair),
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li(TagType.pair),
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script(TagType.pair),
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style(TagType.pair);
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public TagType type;
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private Tag(final TagType type) {
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this.type = type;
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}
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}
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// all these tags must be given in lowercase, because the tags from the files are compared in lowercase
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static {
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for (final Tag tag: Tag.values()) {
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if (tag.type == TagType.singleton) linkTags0.add(tag.name());
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if (tag.type == TagType.pair) linkTags1.add(tag.name());
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}
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//<iframe src="../../../index.htm" name="SELFHTML_in_a_box" width="90%" height="400">
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}
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// class variables: collectors for links
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private final List<AnchorURL> anchors;
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private final LinkedHashMap<DigestURL, String> rss, css;
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private final LinkedHashMap<DigestURL, EmbedEntry> embeds; // urlhash/embed relation
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private final List<ImageEntry> images;
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private final Set<DigestURL> script, frames, iframes;
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private final Map<String, String> metas;
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private final Map<String, DigestURL> hreflang, navigation;
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private LinkedHashSet<String> titles;
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//private String headline;
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private List<String>[] headlines;
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private final ClusteredScoreMap<String> bold, italic, underline;
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private final List<String> li;
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private final CharBuffer content;
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private final EventListenerList htmlFilterEventListeners;
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private double lon, lat;
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private DigestURL canonical, publisher;
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private final int maxLinks;
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private int breadcrumbs;
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/**
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* {@link MultiProtocolURL} to the favicon that belongs to the document
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*/
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private MultiProtocolURL favicon;
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/**
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* The document root {@link MultiProtocolURL}
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*/
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private DigestURL root;
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/**
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* evaluation scores: count appearance of specific attributes
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*/
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private final Evaluation evaluationScores;
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@SuppressWarnings("unchecked")
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public ContentScraper(final DigestURL root, int maxLinks) {
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// the root value here will not be used to load the resource.
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// it is only the reference for relative links
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super(linkTags0, linkTags1);
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assert root != null;
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this.root = root;
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this.maxLinks = maxLinks;
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this.evaluationScores = new Evaluation();
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this.rss = new SizeLimitedMap<DigestURL, String>(maxLinks);
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this.css = new SizeLimitedMap<DigestURL, String>(maxLinks);
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this.anchors = new ArrayList<AnchorURL>();
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this.images = new ArrayList<ImageEntry>();
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this.embeds = new SizeLimitedMap<DigestURL, EmbedEntry>(maxLinks);
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this.frames = new SizeLimitedSet<DigestURL>(maxLinks);
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this.iframes = new SizeLimitedSet<DigestURL>(maxLinks);
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this.metas = new SizeLimitedMap<String, String>(maxLinks);
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this.hreflang = new SizeLimitedMap<String, DigestURL>(maxLinks);
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this.navigation = new SizeLimitedMap<String, DigestURL>(maxLinks);
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this.script = new SizeLimitedSet<DigestURL>(maxLinks);
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this.titles = new LinkedHashSet<String>();
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this.headlines = new ArrayList[6];
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for (int i = 0; i < this.headlines.length; i++) this.headlines[i] = new ArrayList<String>();
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this.bold = new ClusteredScoreMap<String>();
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this.italic = new ClusteredScoreMap<String>();
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this.underline = new ClusteredScoreMap<String>();
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this.li = new ArrayList<String>();
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this.content = new CharBuffer(MAX_DOCSIZE, 1024);
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this.htmlFilterEventListeners = new EventListenerList();
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this.lon = 0.0d;
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this.lat = 0.0d;
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this.evaluationScores.match(Element.url, root.toNormalform(true));
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this.canonical = null;
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this.publisher = null;
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this.breadcrumbs = 0;
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}
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@Override
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public void finish() {
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this.content.trimToSize();
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}
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@Override
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public void scrapeText(final char[] newtext, final String insideTag) {
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// System.out.println("SCRAPE: " + UTF8.String(newtext));
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if (insideTag != null && ("script".equals(insideTag) || "style".equals(insideTag))) return;
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int p, pl, q, s = 0;
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// match evaluation pattern
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this.evaluationScores.match(Element.text, newtext);
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// try to find location information in text
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// Opencaching:
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// <nobr>N 50o 05.453'</nobr><nobr>E 008o 30.191'</nobr>
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// N 52o 28.025 E 013o 20.299
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location: while (s < newtext.length) {
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pl = 1;
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p = CharBuffer.indexOf(newtext, s, this.degree);
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if (p < 0) {p = CharBuffer.indexOf(newtext, s, "°".toCharArray()); if (p >= 0) pl = 5;}
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if (p < 0) break location;
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q = CharBuffer.indexOf(newtext, p + pl, this.minuteCharsHTML);
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if (q < 0) q = CharBuffer.indexOf(newtext, p + pl, "'".toCharArray());
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if (q < 0) q = CharBuffer.indexOf(newtext, p + pl, " E".toCharArray());
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if (q < 0) q = CharBuffer.indexOf(newtext, p + pl, " W".toCharArray());
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if (q < 0 && newtext.length - p == 7 + pl) q = newtext.length;
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if (q < 0) break location;
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int r = p;
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while (r-- > 1) {
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if (newtext[r] == ' ') {
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r--;
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if (newtext[r] == 'N') {
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this.lat = Float.parseFloat(new String(newtext, r + 2, p - r - 2)) +
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Float.parseFloat(new String(newtext, p + pl + 1, q - p - pl - 1)) / 60.0d;
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if (this.lon != 0.0d) break location;
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s = q + 6;
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continue location;
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}
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if (newtext[r] == 'S') {
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this.lat = -Float.parseFloat(new String(newtext, r + 2, p - r - 2)) -
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Float.parseFloat(new String(newtext, p + pl + 1, q - p - pl - 1)) / 60.0d;
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if (this.lon != 0.0d) break location;
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s = q + 6;
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continue location;
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}
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if (newtext[r] == 'E') {
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this.lon = Float.parseFloat(new String(newtext, r + 2, p - r - 2)) +
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Float.parseFloat(new String(newtext, p + pl + 1, q - p - pl - 1)) / 60.0d;
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if (this.lat != 0.0d) break location;
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s = q + 6;
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continue location;
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}
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if (newtext[r] == 'W') {
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this.lon = -Float.parseFloat(new String(newtext, r + 2, p - r - 2)) -
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Float.parseFloat(new String(newtext, p + 2, q - p - pl - 1)) / 60.0d;
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if (this.lat != 0.0d) break location;
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s = q + 6;
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continue location;
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}
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break location;
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}
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}
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break location;
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}
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// find tags inside text
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String b = cleanLine(stripAllTags(newtext));
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if ((insideTag != null) && (!(insideTag.equals("a")))) {
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// texts inside tags sometimes have no punctuation at the line end
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// this is bad for the text semantics, because it is not possible for the
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// condenser to distinguish headlines from text beginnings.
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// to make it easier for the condenser, a dot ('.') is appended in case that
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// no punctuation is part of the newtext line
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if ((b.length() != 0) && (!(SentenceReader.punctuation(b.charAt(b.length() - 1))))) b = b + '.';
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//System.out.println("*** Appended dot: " + b.toString());
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}
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// find http links inside text
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s = 0;
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String u;
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while (s < b.length()) {
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p = find(b, dpssp, s);
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if (p == Integer.MAX_VALUE) break;
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s = Math.max(0, p - 5);
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p = find(b, protp, s);
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if (p == Integer.MAX_VALUE) break;
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q = b.indexOf(" ", p + 1);
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u = b.substring(p, q < 0 ? b.length() : q);
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if (u.endsWith(".")) u = u.substring(0, u.length() - 1); // remove the '.' that was appended above
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s = p + 6;
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try {
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this.anchors.add(new AnchorURL(u));
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continue;
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} catch (final MalformedURLException e) {}
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}
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// append string to content
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if (!b.isEmpty()) {
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this.content.append(b);
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this.content.appendSpace();
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}
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}
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private final static Pattern dpssp = Pattern.compile("://");
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private final static Pattern protp = Pattern.compile("smb://|ftp://|http://|https://");
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private static final int find(final String s, final Pattern m, final int start) {
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final Matcher mm = m.matcher(s.subSequence(start, s.length()));
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if (!mm.find()) return Integer.MAX_VALUE;
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final int p = mm.start() + start;
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//final int p = s.indexOf(m, start);
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return (p < 0) ? Integer.MAX_VALUE : p;
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}
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private AnchorURL absolutePath(final String relativePath) {
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try {
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return AnchorURL.newAnchor(this.root, relativePath);
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} catch (final Exception e) {
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return null;
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}
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}
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@Override
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public void scrapeTag0(final String tagname, final Properties tagopts) {
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if (tagname.equalsIgnoreCase("img")) {
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final String src = tagopts.getProperty("src", EMPTY_STRING);
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try {
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if (src.length() > 0) {
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final AnchorURL url = absolutePath(src);
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if (url != null) {
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final int width = Integer.parseInt(tagopts.getProperty("width", "-1"));
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final int height = Integer.parseInt(tagopts.getProperty("height", "-1"));
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final ImageEntry ie = new ImageEntry(url, tagopts.getProperty("alt", EMPTY_STRING), width, height, -1);
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this.images.add(ie);
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}
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}
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} catch (final NumberFormatException e) {}
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this.evaluationScores.match(Element.imgpath, src);
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} else if(tagname.equalsIgnoreCase("base")) {
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try {
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this.root = new DigestURL(tagopts.getProperty("href", EMPTY_STRING));
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} catch (final MalformedURLException e) {}
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} else if (tagname.equalsIgnoreCase("frame")) {
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final AnchorURL src = absolutePath(tagopts.getProperty("src", EMPTY_STRING));
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tagopts.put("src", src.toNormalform(true));
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src.setAll(tagopts);
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this.anchors.add(src);
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this.frames.add(src);
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this.evaluationScores.match(Element.framepath, src.toNormalform(true));
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} else if (tagname.equalsIgnoreCase("body")) {
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final String c = tagopts.getProperty("class", EMPTY_STRING);
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this.evaluationScores.match(Element.bodyclass, c);
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} else if (tagname.equalsIgnoreCase("div")) {
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final String id = tagopts.getProperty("id", EMPTY_STRING);
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this.evaluationScores.match(Element.divid, id);
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final String itemtype = tagopts.getProperty("itemtype", EMPTY_STRING);
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if (itemtype.equals("http://data-vocabulary.org/Breadcrumb")) {
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breadcrumbs++;
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}
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} else if (tagname.equalsIgnoreCase("meta")) {
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final String content = tagopts.getProperty("content", EMPTY_STRING);
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String name = tagopts.getProperty("name", EMPTY_STRING);
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if (name.length() > 0) {
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this.metas.put(name.toLowerCase(), CharacterCoding.html2unicode(content));
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if (name.toLowerCase().equals("generator")) {
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this.evaluationScores.match(Element.metagenerator, content);
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}
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}
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name = tagopts.getProperty("http-equiv", EMPTY_STRING);
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if (name.length() > 0) {
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this.metas.put(name.toLowerCase(), CharacterCoding.html2unicode(content));
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}
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name = tagopts.getProperty("property", EMPTY_STRING);
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if (name.length() > 0) {
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this.metas.put(name.toLowerCase(), CharacterCoding.html2unicode(content));
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}
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} else if (tagname.equalsIgnoreCase("area")) {
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final String areatitle = cleanLine(tagopts.getProperty("title", EMPTY_STRING));
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//String alt = tagopts.getProperty("alt",EMPTY_STRING);
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final String href = tagopts.getProperty("href", EMPTY_STRING);
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if (href.length() > 0) {
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tagopts.put("name", areatitle);
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AnchorURL url = absolutePath(href);
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tagopts.put("href", url.toNormalform(true));
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url.setAll(tagopts);
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this.anchors.add(url);
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}
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} else if (tagname.equalsIgnoreCase("link")) {
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final String href = tagopts.getProperty("href", EMPTY_STRING);
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final AnchorURL newLink = absolutePath(href);
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if (newLink != null) {
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tagopts.put("href", newLink.toNormalform(true));
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String rel = tagopts.getProperty("rel", EMPTY_STRING);
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final String linktitle = tagopts.getProperty("title", EMPTY_STRING);
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final String type = tagopts.getProperty("type", EMPTY_STRING);
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final String hreflang = tagopts.getProperty("hreflang", EMPTY_STRING);
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if (rel.equalsIgnoreCase("shortcut icon")) {
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final ImageEntry ie = new ImageEntry(newLink, linktitle, -1, -1, -1);
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this.images.add(ie);
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this.favicon = newLink;
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} else if (rel.equalsIgnoreCase("canonical")) {
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tagopts.put("name", this.titles.size() == 0 ? "" : this.titles.iterator().next());
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newLink.setAll(tagopts);
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this.anchors.add(newLink);
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this.canonical = newLink;
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} else if (rel.equalsIgnoreCase("publisher")) {
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this.publisher = newLink;
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} else if (rel.equalsIgnoreCase("top") || rel.equalsIgnoreCase("up") || rel.equalsIgnoreCase("next") || rel.equalsIgnoreCase("prev") || rel.equalsIgnoreCase("first") || rel.equalsIgnoreCase("last")) {
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this.navigation.put(rel, newLink);
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} else if (rel.equalsIgnoreCase("alternate") && type.equalsIgnoreCase("application/rss+xml")) {
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this.rss.put(newLink, linktitle);
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} else if (rel.equalsIgnoreCase("alternate") && hreflang.length() > 0) {
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this.hreflang.put(hreflang, newLink);
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} else if (rel.equalsIgnoreCase("stylesheet") && type.equalsIgnoreCase("text/css")) {
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this.css.put(newLink, rel);
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this.evaluationScores.match(Element.csspath, href);
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} else if (!rel.equalsIgnoreCase("stylesheet") && !rel.equalsIgnoreCase("alternate stylesheet")) {
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tagopts.put("name", linktitle);
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newLink.setAll(tagopts);
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this.anchors.add(newLink);
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}
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}
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} else if(tagname.equalsIgnoreCase("embed")) {
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final String src = tagopts.getProperty("src", EMPTY_STRING);
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try {
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if (src.length() > 0) {
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final AnchorURL url = absolutePath(src);
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if (url != null) {
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final int width = Integer.parseInt(tagopts.getProperty("width", "-1"));
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final int height = Integer.parseInt(tagopts.getProperty("height", "-1"));
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tagopts.put("src", url.toNormalform(true));
|
|
final EmbedEntry ie = new EmbedEntry(url, width, height, tagopts.getProperty("type", EMPTY_STRING), tagopts.getProperty("pluginspage", EMPTY_STRING));
|
|
this.embeds.put(url, ie);
|
|
url.setAll(tagopts);
|
|
this.anchors.add(url);
|
|
}
|
|
}
|
|
} catch (final NumberFormatException e) {}
|
|
} else if(tagname.equalsIgnoreCase("param")) {
|
|
final String name = tagopts.getProperty("name", EMPTY_STRING);
|
|
if (name.equalsIgnoreCase("movie")) {
|
|
AnchorURL url = absolutePath(tagopts.getProperty("value", EMPTY_STRING));
|
|
tagopts.put("value", url.toNormalform(true));
|
|
url.setAll(tagopts);
|
|
this.anchors.add(url);
|
|
}
|
|
} else if (tagname.equalsIgnoreCase("iframe")) {
|
|
final AnchorURL src = absolutePath(tagopts.getProperty("src", EMPTY_STRING));
|
|
tagopts.put("src", src.toNormalform(true));
|
|
src.setAll(tagopts);
|
|
this.anchors.add(src);
|
|
this.iframes.add(src);
|
|
this.evaluationScores.match(Element.iframepath, src.toNormalform(true));
|
|
} else if (tagname.equalsIgnoreCase("html")) {
|
|
final String lang = tagopts.getProperty("lang", EMPTY_STRING);
|
|
if (!lang.isEmpty()) // fake a language meta to preserv detection from <html lang="xx" />
|
|
this.metas.put("dc.language",lang.substring(0,2)); // fix found entries like "hu-hu"
|
|
}
|
|
|
|
// fire event
|
|
fireScrapeTag0(tagname, tagopts);
|
|
}
|
|
|
|
@Override
|
|
public void scrapeTag1(final String tagname, final Properties tagopts, char[] text) {
|
|
// System.out.println("ScrapeTag1: tagname=" + tagname + ", opts=" + tagopts.toString() + ", text=" + UTF8.String(text));
|
|
if (tagname.equalsIgnoreCase("a") && text.length < 2048) {
|
|
final String href = tagopts.getProperty("href", EMPTY_STRING);
|
|
AnchorURL url;
|
|
if ((href.length() > 0) && ((url = absolutePath(href)) != null)) {
|
|
final String ext = MultiProtocolURL.getFileExtension(url.getFileName());
|
|
if (ext.equals("png") || ext.equals("gif") || ext.equals("jpg") || ext.equals("jpeg") || ext.equals("tiff") || ext.equals("tif")) {
|
|
// special handling of such urls: put them to the image urls
|
|
final ImageEntry ie = new ImageEntry(url, recursiveParse(url, text), -1, -1, -1);
|
|
this.images.add(ie);
|
|
} else {
|
|
if (followDenied()) {
|
|
String rel = tagopts.getProperty("rel", EMPTY_STRING);
|
|
if (rel.length() == 0) rel = "nofollow"; else if (rel.indexOf("nofollow") < 0) rel += ",nofollow";
|
|
tagopts.put("rel", rel);
|
|
}
|
|
tagopts.put("text", new String(text));
|
|
tagopts.put("href", url.toNormalform(true)); // we must assign this because the url may have resolved backpaths and may not be absolute
|
|
url.setAll(tagopts);
|
|
recursiveParse(url, text);
|
|
this.anchors.add(url);
|
|
}
|
|
}
|
|
this.evaluationScores.match(Element.apath, href);
|
|
}
|
|
final String h;
|
|
if ((tagname.equalsIgnoreCase("h1")) && (text.length < 1024)) {
|
|
h = recursiveParse(null, text);
|
|
if (h.length() > 0) this.headlines[0].add(h);
|
|
} else if((tagname.equalsIgnoreCase("h2")) && (text.length < 1024)) {
|
|
h = recursiveParse(null, text);
|
|
if (h.length() > 0) this.headlines[1].add(h);
|
|
} else if ((tagname.equalsIgnoreCase("h3")) && (text.length < 1024)) {
|
|
h = recursiveParse(null, text);
|
|
if (h.length() > 0) this.headlines[2].add(h);
|
|
} else if ((tagname.equalsIgnoreCase("h4")) && (text.length < 1024)) {
|
|
h = recursiveParse(null, text);
|
|
if (h.length() > 0) this.headlines[3].add(h);
|
|
} else if ((tagname.equalsIgnoreCase("h5")) && (text.length < 1024)) {
|
|
h = recursiveParse(null, text);
|
|
if (h.length() > 0) this.headlines[4].add(h);
|
|
} else if ((tagname.equalsIgnoreCase("h6")) && (text.length < 1024)) {
|
|
h = recursiveParse(null, text);
|
|
if (h.length() > 0) this.headlines[5].add(h);
|
|
} else if ((tagname.equalsIgnoreCase("title")) && (text.length < 1024)) {
|
|
String t = recursiveParse(null, text);
|
|
this.titles.add(t);
|
|
this.evaluationScores.match(Element.title, t);
|
|
} else if ((tagname.equalsIgnoreCase("b")) && (text.length < 1024)) {
|
|
h = recursiveParse(null, text);
|
|
if (h.length() > 0) this.bold.inc(h);
|
|
} else if ((tagname.equalsIgnoreCase("strong")) && (text.length < 1024)) {
|
|
h = recursiveParse(null, text);
|
|
if (h.length() > 0) this.bold.inc(h);
|
|
} else if ((tagname.equalsIgnoreCase("i")) && (text.length < 1024)) {
|
|
h = recursiveParse(null, text);
|
|
if (h.length() > 0) this.italic.inc(h);
|
|
} else if ((tagname.equalsIgnoreCase("u")) && (text.length < 1024)) {
|
|
h = recursiveParse(null, text);
|
|
if (h.length() > 0) this.underline.inc(h);
|
|
} else if ((tagname.equalsIgnoreCase("li")) && (text.length < 1024)) {
|
|
h = recursiveParse(null, text);
|
|
if (h.length() > 0) this.li.add(h);
|
|
} else if (tagname.equalsIgnoreCase("script")) {
|
|
final String src = tagopts.getProperty("src", EMPTY_STRING);
|
|
if (src.length() > 0) {
|
|
this.script.add(absolutePath(src));
|
|
this.evaluationScores.match(Element.scriptpath, src);
|
|
} else {
|
|
this.evaluationScores.match(Element.scriptcode, LB.matcher(new String(text)).replaceAll(" "));
|
|
}
|
|
}
|
|
|
|
// fire event
|
|
fireScrapeTag1(tagname, tagopts, text);
|
|
}
|
|
|
|
|
|
@Override
|
|
public void scrapeComment(final char[] comment) {
|
|
this.evaluationScores.match(Element.comment, LB.matcher(new String(comment)).replaceAll(" "));
|
|
}
|
|
|
|
private String recursiveParse(final AnchorURL linkurl, final char[] inlineHtml) {
|
|
if (inlineHtml.length < 14) return cleanLine(CharacterCoding.html2unicode(stripAllTags(inlineHtml)));
|
|
|
|
// start a new scraper to parse links inside this text
|
|
// parsing the content
|
|
final ContentScraper scraper = new ContentScraper(this.root, this.maxLinks);
|
|
final TransformerWriter writer = new TransformerWriter(null, null, scraper, null, false);
|
|
try {
|
|
FileUtils.copy(new CharArrayReader(inlineHtml), writer);
|
|
} catch (final IOException e) {
|
|
ConcurrentLog.logException(e);
|
|
return cleanLine(CharacterCoding.html2unicode(stripAllTags(inlineHtml)));
|
|
} finally {
|
|
try {
|
|
writer.close();
|
|
} catch (final IOException e) {
|
|
}
|
|
}
|
|
for (final AnchorURL entry: scraper.getAnchors()) {
|
|
this.anchors.add(entry);
|
|
}
|
|
for (ImageEntry ie: scraper.images) {
|
|
if (linkurl != null) {
|
|
ie.setLinkurl(linkurl);
|
|
ie.setAnchortext(new String(inlineHtml));
|
|
}
|
|
this.images.add(ie);
|
|
}
|
|
|
|
String line = cleanLine(CharacterCoding.html2unicode(stripAllTags(scraper.content.getChars())));
|
|
scraper.close();
|
|
return line;
|
|
}
|
|
|
|
public List<String> getTitles() {
|
|
|
|
// some documents have a title tag as meta tag
|
|
String s = this.metas.get("title");
|
|
if (s != null && s.length() > 0) {
|
|
this.titles.add(s);
|
|
}
|
|
|
|
if (this.titles.size() == 0) {
|
|
// take any headline
|
|
for (int i = 0; i < this.headlines.length; i++) {
|
|
if (!this.headlines[i].isEmpty()) {
|
|
this.titles.add(this.headlines[i].get(0));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// extract headline from file name
|
|
ArrayList<String> t = new ArrayList<String>();
|
|
t.addAll(this.titles);
|
|
return t;
|
|
}
|
|
|
|
public String[] getHeadlines(final int i) {
|
|
assert ((i >= 1) && (i <= this.headlines.length));
|
|
return this.headlines[i - 1].toArray(new String[this.headlines[i - 1].size()]);
|
|
}
|
|
|
|
public String[] getBold() {
|
|
final List<String> a = new ArrayList<String>();
|
|
final Iterator<String> i = this.bold.keys(false);
|
|
while (i.hasNext()) a.add(i.next());
|
|
return a.toArray(new String[a.size()]);
|
|
}
|
|
|
|
public String[] getBoldCount(final String[] a) {
|
|
final String[] counter = new String[a.length];
|
|
for (int i = 0; i < a.length; i++) counter[i] = Integer.toString(this.bold.get(a[i]));
|
|
return counter;
|
|
}
|
|
|
|
public String[] getItalic() {
|
|
final List<String> a = new ArrayList<String>();
|
|
final Iterator<String> i = this.italic.keys(false);
|
|
while (i.hasNext()) a.add(i.next());
|
|
return a.toArray(new String[a.size()]);
|
|
}
|
|
|
|
public String[] getItalicCount(final String[] a) {
|
|
final String[] counter = new String[a.length];
|
|
for (int i = 0; i < a.length; i++) counter[i] = Integer.toString(this.italic.get(a[i]));
|
|
return counter;
|
|
}
|
|
|
|
public String[] getUnderline() {
|
|
final List<String> a = new ArrayList<String>();
|
|
final Iterator<String> i = this.underline.keys(false);
|
|
while (i.hasNext()) a.add(i.next());
|
|
return a.toArray(new String[a.size()]);
|
|
}
|
|
|
|
public String[] getUnderlineCount(final String[] a) {
|
|
final String[] counter = new String[a.length];
|
|
for (int i = 0; i < a.length; i++) counter[i] = Integer.toString(this.underline.get(a[i]));
|
|
return counter;
|
|
}
|
|
|
|
public String[] getLi() {
|
|
return this.li.toArray(new String[this.li.size()]);
|
|
}
|
|
|
|
public DigestURL[] getFlash() {
|
|
String ext;
|
|
ArrayList<DigestURL> f = new ArrayList<DigestURL>();
|
|
for (final DigestURL url: this.anchors) {
|
|
ext = MultiProtocolURL.getFileExtension(url.getFileName());
|
|
if (ext == null) continue;
|
|
if (ext.equals("swf")) f.add(url);
|
|
}
|
|
return f.toArray(new DigestURL[f.size()]);
|
|
}
|
|
|
|
public boolean containsFlash() {
|
|
String ext;
|
|
for (final MultiProtocolURL url: this.anchors) {
|
|
ext = MultiProtocolURL.getFileExtension(url.getFileName());
|
|
if (ext == null) continue;
|
|
if (ext.equals("swf")) return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public int breadcrumbCount() {
|
|
return this.breadcrumbs;
|
|
}
|
|
|
|
public String getText() {
|
|
try {
|
|
return this.content.toString();
|
|
} catch (final OutOfMemoryError e) {
|
|
ConcurrentLog.logException(e);
|
|
return "";
|
|
}
|
|
}
|
|
|
|
public List<AnchorURL> getAnchors() {
|
|
// returns a url (String) / name (String) relation
|
|
return this.anchors;
|
|
}
|
|
|
|
public LinkedHashMap<DigestURL, String> getRSS() {
|
|
// returns a url (String) / name (String) relation
|
|
return this.rss;
|
|
}
|
|
|
|
public Map<DigestURL, String> getCSS() {
|
|
// returns a url (String) / name (String) relation
|
|
return this.css;
|
|
}
|
|
|
|
public Set<DigestURL> getFrames() {
|
|
// returns a url (String) / name (String) relation
|
|
return this.frames;
|
|
}
|
|
|
|
public Set<DigestURL> getIFrames() {
|
|
// returns a url (String) / name (String) relation
|
|
return this.iframes;
|
|
}
|
|
|
|
public Set<DigestURL> getScript() {
|
|
return this.script;
|
|
}
|
|
|
|
public DigestURL getCanonical() {
|
|
return this.canonical;
|
|
}
|
|
|
|
public DigestURL getPublisherLink() {
|
|
return this.publisher;
|
|
}
|
|
|
|
public Map<String, DigestURL> getHreflang() {
|
|
return this.hreflang;
|
|
}
|
|
|
|
public Map<String, DigestURL> getNavigation() {
|
|
return this.navigation;
|
|
}
|
|
|
|
/**
|
|
* get all images
|
|
* @return a map of <urlhash, ImageEntry>
|
|
*/
|
|
public List<ImageEntry> getImages() {
|
|
return this.images;
|
|
}
|
|
|
|
public Map<DigestURL, EmbedEntry> getEmbeds() {
|
|
return this.embeds;
|
|
}
|
|
|
|
public Map<String, String> getMetas() {
|
|
return this.metas;
|
|
}
|
|
|
|
/**
|
|
* @return the {@link MultiProtocolURL} to the favicon that belongs to the document
|
|
*/
|
|
public MultiProtocolURL getFavicon() {
|
|
return this.favicon;
|
|
}
|
|
|
|
/*
|
|
DC in html example:
|
|
<meta name="DC.title" lang="en" content="Expressing Dublin Core in HTML/XHTML meta and link elements" />
|
|
<meta name="DC.creator" content="Andy Powell, UKOLN, University of Bath" />
|
|
<meta name="DC.identifier" scheme="DCTERMS.URI" content="http://dublincore.org/documents/dcq-html/" />
|
|
<meta name="DC.format" scheme="DCTERMS.IMT" content="text/html" />
|
|
<meta name="DC.type" scheme="DCTERMS.DCMIType" content="Text" />
|
|
*/
|
|
|
|
public boolean indexingDenied() {
|
|
final String s = this.metas.get("robots");
|
|
if (s == null) return false;
|
|
if (s.indexOf("noindex",0) >= 0) return true;
|
|
return false;
|
|
}
|
|
|
|
public boolean followDenied() {
|
|
final String s = this.metas.get("robots");
|
|
if (s == null) return false;
|
|
if (s.indexOf("nofollow",0) >= 0) return true;
|
|
return false;
|
|
}
|
|
|
|
public List<String> getDescriptions() {
|
|
String s = this.metas.get("description");
|
|
if (s == null) s = this.metas.get("dc.description");
|
|
List<String> descriptions = new ArrayList<String>();
|
|
if (s == null) return descriptions;
|
|
descriptions.add(s);
|
|
return descriptions;
|
|
}
|
|
|
|
public String getContentType() {
|
|
final String s = this.metas.get("content-type");
|
|
if (s == null) return EMPTY_STRING;
|
|
return s;
|
|
}
|
|
|
|
public String getAuthor() {
|
|
String s = this.metas.get("author");
|
|
if (s == null) s = this.metas.get("dc.creator");
|
|
if (s == null) return EMPTY_STRING;
|
|
return s;
|
|
}
|
|
|
|
public String getPublisher() {
|
|
String s = this.metas.get("copyright");
|
|
if (s == null) s = this.metas.get("dc.publisher");
|
|
if (s == null) return EMPTY_STRING;
|
|
return s;
|
|
}
|
|
|
|
private final static Pattern commaSepPattern = Pattern.compile(" |,");
|
|
private final static Pattern semicSepPattern = Pattern.compile(" |;");
|
|
|
|
public Set<String> getContentLanguages() {
|
|
// i.e. <meta name="DC.language" content="en" scheme="DCTERMS.RFC3066">
|
|
// or <meta http-equiv="content-language" content="en">
|
|
String s = this.metas.get("content-language");
|
|
if (s == null) s = this.metas.get("dc.language");
|
|
if (s == null) return null;
|
|
final Set<String> hs = new HashSet<String>();
|
|
final String[] cl = commaSepPattern.split(s);
|
|
int p;
|
|
for (int i = 0; i < cl.length; i++) {
|
|
cl[i] = cl[i].toLowerCase();
|
|
p = cl[i].indexOf('-');
|
|
if (p > 0) cl[i] = cl[i].substring(0, p);
|
|
if (ISO639.exists(cl[i])) hs.add(cl[i]);
|
|
}
|
|
if (hs.isEmpty()) return null;
|
|
return hs;
|
|
}
|
|
|
|
public String[] getKeywords() {
|
|
String s = this.metas.get("keywords");
|
|
if (s == null) s = this.metas.get("dc.description");
|
|
if (s == null) s = EMPTY_STRING;
|
|
if (s.isEmpty()) {
|
|
return new String[0];
|
|
}
|
|
if (s.contains(",")) return commaSepPattern.split(s);
|
|
if (s.contains(";")) return semicSepPattern.split(s);
|
|
return s.split("\\s");
|
|
}
|
|
|
|
public int getRefreshSeconds() {
|
|
final String s = this.metas.get("refresh");
|
|
if (s == null) return 9999;
|
|
try {
|
|
final int pos = s.indexOf(';');
|
|
if (pos < 0) return 9999;
|
|
final int i = NumberTools.parseIntDecSubstring(s, 0, pos);
|
|
return i;
|
|
} catch (final NumberFormatException e) {
|
|
return 9999;
|
|
}
|
|
}
|
|
|
|
public String getRefreshPath() {
|
|
String s = this.metas.get("refresh");
|
|
if (s == null) return EMPTY_STRING;
|
|
|
|
final int pos = s.indexOf(';');
|
|
if (pos < 0) return EMPTY_STRING;
|
|
s = s.substring(pos + 1).trim();
|
|
if (s.toLowerCase().startsWith("url=")) return s.substring(4).trim();
|
|
return EMPTY_STRING;
|
|
}
|
|
|
|
public Date getDate() {
|
|
String content;
|
|
|
|
// <meta name="date" content="YYYY-MM-DD..." />
|
|
content = this.metas.get("date");
|
|
if (content != null) try {return ISO8601Formatter.FORMATTER.parse(content);} catch (ParseException e) {}
|
|
|
|
// <meta name="DC.date" content="YYYY-MM-DD" />
|
|
content = this.metas.get("dc.date");
|
|
if (content != null) try {return ISO8601Formatter.FORMATTER.parse(content);} catch (ParseException e) {}
|
|
|
|
// <meta name="DC:date" content="YYYY-MM-DD" />
|
|
content = this.metas.get("dc:date");
|
|
if (content != null) try {return ISO8601Formatter.FORMATTER.parse(content);} catch (ParseException e) {}
|
|
|
|
// <meta http-equiv="last-modified" content="YYYY-MM-DD" />
|
|
content = this.metas.get("last-modified");
|
|
if (content != null) try {return ISO8601Formatter.FORMATTER.parse(content);} catch (ParseException e) {}
|
|
|
|
return new Date();
|
|
}
|
|
|
|
// parse location
|
|
// <meta NAME="ICBM" CONTENT="38.90551492, 1.454004505" />
|
|
// <meta NAME="geo.position" CONTENT="38.90551492;1.454004505" />
|
|
|
|
public double getLon() {
|
|
if (this.lon != 0.0d) return this.lon;
|
|
String s = this.metas.get("ICBM"); // InterContinental Ballistic Missile (abbrev. supposed to be a joke: http://www.jargon.net/jargonfile/i/ICBMaddress.html), see http://geourl.org/add.html#icbm
|
|
if (s != null) {
|
|
int p = s.indexOf(';');
|
|
if (p < 0) p = s.indexOf(',');
|
|
if (p < 0) p = s.indexOf(' ');
|
|
if (p > 0) {
|
|
this.lat = Double.parseDouble(s.substring(0, p).trim());
|
|
this.lon = Double.parseDouble(s.substring(p + 1).trim());
|
|
}
|
|
}
|
|
if (this.lon != 0.0d) return this.lon;
|
|
s = this.metas.get("geo.position"); // http://geotags.com/geobot/add-tags.html
|
|
if (s != null) {
|
|
int p = s.indexOf(';');
|
|
if (p < 0) p = s.indexOf(',');
|
|
if (p < 0) p = s.indexOf(' ');
|
|
if (p > 0) {
|
|
this.lat = Double.parseDouble(s.substring(0, p).trim());
|
|
this.lon = Double.parseDouble(s.substring(p + 1).trim());
|
|
}
|
|
}
|
|
return this.lon;
|
|
}
|
|
|
|
public double getLat() {
|
|
if (this.lat != 0.0d) return this.lat;
|
|
getLon(); // parse with getLon() method which creates also the lat value
|
|
return this.lat;
|
|
}
|
|
|
|
/**
|
|
* produce all model names
|
|
* @return a set of model names
|
|
*/
|
|
public Set<String> getEvaluationModelNames() {
|
|
return this.evaluationScores.getModelNames();
|
|
}
|
|
|
|
public String[] getEvaluationModelScoreNames(final String modelName) {
|
|
final List<String> a = new ArrayList<String>();
|
|
final ClusteredScoreMap<String> scores = this.evaluationScores.getScores(modelName);
|
|
if (scores != null) {
|
|
final Iterator<String> i = scores.keys(false);
|
|
while (i.hasNext()) a.add(i.next());
|
|
}
|
|
return a.toArray(new String[a.size()]);
|
|
}
|
|
|
|
public String[] getEvaluationModelScoreCounts(final String modelName, final String[] a) {
|
|
final ClusteredScoreMap<String> scores = this.evaluationScores.getScores(modelName);
|
|
final String[] counter = new String[a.length];
|
|
if (scores != null) {
|
|
for (int i = 0; i < a.length; i++) counter[i] = Integer.toString(scores.get(a[i]));
|
|
}
|
|
return counter;
|
|
}
|
|
|
|
/*
|
|
* (non-Javadoc)
|
|
* @see de.anomic.htmlFilter.htmlFilterScraper#close()
|
|
*/
|
|
@Override
|
|
public void close() {
|
|
// free resources
|
|
super.close();
|
|
this.anchors.clear();
|
|
this.rss.clear();
|
|
this.css.clear();
|
|
this.script.clear();
|
|
this.frames.clear();
|
|
this.iframes.clear();
|
|
this.embeds.clear();
|
|
this.images.clear();
|
|
this.metas.clear();
|
|
this.titles.clear();
|
|
this.headlines = null;
|
|
this.bold.clear();
|
|
this.italic.clear();
|
|
this.content.clear();
|
|
this.root = null;
|
|
}
|
|
|
|
public void print() {
|
|
for (String t: this.titles) {
|
|
System.out.println("TITLE :" + t);
|
|
}
|
|
for (int i = 0; i < 4; i++) {
|
|
System.out.println("HEADLINE" + i + ":" + this.headlines[i].toString());
|
|
}
|
|
System.out.println("ANCHORS :" + this.anchors.toString());
|
|
System.out.println("IMAGES :" + this.images.toString());
|
|
System.out.println("METAS :" + this.metas.toString());
|
|
System.out.println("TEXT :" + this.content.toString());
|
|
}
|
|
|
|
@Override
|
|
public void registerHtmlFilterEventListener(final ScraperListener listener) {
|
|
if (listener != null) {
|
|
this.htmlFilterEventListeners.add(ScraperListener.class, listener);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void deregisterHtmlFilterEventListener(final ScraperListener listener) {
|
|
if (listener != null) {
|
|
this.htmlFilterEventListeners.remove(ScraperListener.class, listener);
|
|
}
|
|
}
|
|
|
|
private void fireScrapeTag0(final String tagname, final Properties tagopts) {
|
|
final Object[] listeners = this.htmlFilterEventListeners.getListenerList();
|
|
for (int i=0; i<listeners.length; i+=2) {
|
|
if (listeners[i]==ScraperListener.class) {
|
|
((ScraperListener)listeners[i+1]).scrapeTag0(tagname, tagopts);
|
|
}
|
|
}
|
|
}
|
|
|
|
private void fireScrapeTag1(final String tagname, final Properties tagopts, final char[] text) {
|
|
final Object[] listeners = this.htmlFilterEventListeners.getListenerList();
|
|
for (int i=0; i<listeners.length; i+=2) {
|
|
if (listeners[i]==ScraperListener.class) {
|
|
((ScraperListener)listeners[i+1]).scrapeTag1(tagname, tagopts, text);
|
|
}
|
|
}
|
|
}
|
|
|
|
public static ContentScraper parseResource(final File file, final int maxLinks) throws IOException {
|
|
// load page
|
|
final byte[] page = FileUtils.read(file);
|
|
if (page == null) throw new IOException("no content in file " + file.toString());
|
|
|
|
// scrape document to look up charset
|
|
final ScraperInputStream htmlFilter = new ScraperInputStream(new ByteArrayInputStream(page),"UTF-8", new DigestURL("http://localhost"),null,false, maxLinks);
|
|
String charset = htmlParser.patchCharsetEncoding(htmlFilter.detectCharset());
|
|
htmlFilter.close();
|
|
if (charset == null) charset = Charset.defaultCharset().toString();
|
|
|
|
// scrape content
|
|
final ContentScraper scraper = new ContentScraper(new DigestURL("http://localhost"), maxLinks);
|
|
final Writer writer = new TransformerWriter(null, null, scraper, null, false);
|
|
FileUtils.copy(new ByteArrayInputStream(page), writer, Charset.forName(charset));
|
|
writer.close();
|
|
return scraper;
|
|
}
|
|
|
|
}
|
|
|