- added media fetcher/crawler class (not ready yet) git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@1992 6c8d7289-2bf4-0310-a012-ef5d649a1542pull/1/head
orbiter
19 years ago
parent
80ef2355a8
commit
6b63e26cbb
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// plasmaSearchMedia.java
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// -----------------------
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// part of YACY
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// (C) by Michael Peter Christen; mc@anomic.de
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2006
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// Created: 03.04.2006
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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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//
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// Using this software in any meaning (reading, learning, copying, compiling,
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// running) means that you agree that the Author(s) is (are) not responsible
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// for cost, loss of data or any harm that may be caused directly or indirectly
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// by usage of this softare or this documentation. The usage of this software
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// is on your own risk. The installation and usage (starting/running) of this
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// software may allow other people or application to access your computer and
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// any attached devices and is highly dependent on the configuration of the
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// software which must be done by the user of the software; the author(s) is
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// (are) also not responsible for proper configuration and usage of the
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// software, even if provoked by documentation provided together with
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// the software.
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//
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// Any changes to this file according to the GPL as documented in the file
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// gpl.txt aside this file in the shipment you received can be done to the
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// lines that follows this copyright notice here, but changes must not be
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// done inside the copyright notive above. A re-distribution must contain
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// the intact and unchanged copyright notice.
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// Contributions and changes to the program code must be marked as such.
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package de.anomic.plasma;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.TreeSet;
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import de.anomic.htmlFilter.htmlFilterContentScraper;
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public final class plasmaSearchMedia {
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private HashSet ext;
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private TreeSet media;
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public plasmaSearchMedia(plasmaSnippetCache sc, String exts, URL url, int depth) {
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this(sc, extGen(exts), url, depth);
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}
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public plasmaSearchMedia(plasmaSnippetCache sc, HashSet exts, URL url, int depth) {
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this.ext = exts;
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this.media = new TreeSet();
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byte[] res = sc.getResource(url, true);
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if (res != null) {
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plasmaParserDocument document = sc.parseDocument(url, res);
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// add the media links
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Map ml = document.getMedialinks();
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Iterator i = ml.entrySet().iterator();
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while (i.hasNext()) {
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Map.Entry e = (Map.Entry) i.next();
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String nexturlstring = htmlFilterContentScraper.urlNormalform(null, (String) e.getKey());
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int p = nexturlstring.lastIndexOf(".");
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if ((p > 0) && (this.ext.contains(nexturlstring.substring(p + 1)))) {
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try {
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media.add(new Entry(new URL(nexturlstring), 0));
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} catch (MalformedURLException e1) {}
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}
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}
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// add also links from pages one step deeper, if depth > 0
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if (depth > 0) {
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Map hl = document.getHyperlinks();
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i = hl.entrySet().iterator();
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while (i.hasNext()) {
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Map.Entry e = (Map.Entry) i.next();
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String nexturlstring = htmlFilterContentScraper.urlNormalform(null, (String) e.getKey());
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try {
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addAll(new plasmaSearchMedia(sc, ext, new URL(nexturlstring), depth - 1));
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} catch (MalformedURLException e2) {}
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}
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}
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}
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}
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public plasmaSearchMedia(plasmaSnippetCache sc, String exts, plasmaSearchResult sres) {
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this(sc, extGen(exts), sres);
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}
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public plasmaSearchMedia(plasmaSnippetCache sc, HashSet exts, plasmaSearchResult sres) {
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this.ext = exts;
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this.media = new TreeSet();
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plasmaCrawlLURL.Entry urlentry;
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while (sres.hasMoreElements()) {
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urlentry = sres.nextElement();
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addAll(new plasmaSearchMedia(sc, ext, urlentry.url(), 0));
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}
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}
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private static HashSet extGen(String ext) {
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ext.replaceAll(",", " ");
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String[] exts = ext.split(" ");
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HashSet s = new HashSet(exts.length);
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for (int i = 0; i < exts.length; i++) s.add(exts[i]);
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return s;
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}
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public void addAll(plasmaSearchMedia m) {
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this.media.addAll(m.media);
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}
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public Iterator entries() {
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// returns Entry-Objects
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return media.iterator();
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}
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public class Entry {
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private URL url;
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private int size, width, height;
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public Entry(URL url, int size) {
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this.url = url;
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this.size = size;
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this.width = -1;
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this.height = -1;
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}
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public Entry(URL url, int width, int height) {
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this.url = url;
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this.size = -1;
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this.width = width;
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this.height = height;
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}
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public URL url() {
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return this.url;
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}
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public int size() {
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return this.size;
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}
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public int width() {
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return this.width;
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}
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public int height() {
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return this.height;
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}
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public int hashCode() {
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if ((width > 0) && (height > 0))
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return (((width * height) >> 8) << 16) | (url.hashCode() & 0xFFFF);
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else
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return ((size >> 8) << 16) | (url.hashCode() & 0xFFFF);
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}
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public int compareTo(Object h) {
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// this is needed if this object is stored in a TreeSet
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assert (url != null);
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assert (h instanceof plasmaSearchMedia.Entry);
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int thc = this.hashCode();
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int ohc = ((plasmaSearchMedia.Entry) h).hashCode();
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if (thc < ohc) return -1;
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if (thc > ohc) return 1;
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return 0;
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}
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}
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}
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