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parsing into individual pages and add them all using different URLs. These constructed urls are generated from the source url with an appended page=<pagenumber> attribute to the url get/post properties. This will distinguish the different page entries. The search result list will then replace the post parameter with a url anchor # mark which causes that the original url is presented in the search result. These URLs can be opened directly on the correct page using pdf.js which is now built-in into firefox. That means: if you find a search hit on page 5 and click on the search result, firefox will open the pdf viewer and shows page 5.
116 lines
4.2 KiB
Java
116 lines
4.2 KiB
Java
//SitemapImporter.java
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//------------------------
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//part of YaCy
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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, 2007
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//
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//this file was contributed by Martin Thelian
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//last major change: $LastChangedDate$ by $LastChangedBy$
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//Revision: $LastChangedRevision$
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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.crawler.retrieval;
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import java.io.IOException;
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import java.net.MalformedURLException;
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import java.util.Date;
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import net.yacy.cora.document.encoding.ASCII;
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import net.yacy.cora.document.id.DigestURL;
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import net.yacy.cora.util.ConcurrentLog;
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import net.yacy.crawler.HarvestProcess;
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import net.yacy.crawler.data.CrawlProfile;
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import net.yacy.document.parser.sitemapParser;
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import net.yacy.document.parser.sitemapParser.URLEntry;
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import net.yacy.kelondro.data.meta.URIMetadataNode;
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import net.yacy.search.Switchboard;
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public class SitemapImporter extends Thread {
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private CrawlProfile crawlingProfile = null;
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private static final ConcurrentLog logger = new ConcurrentLog("SITEMAP");
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private DigestURL siteMapURL = null;
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private final Switchboard sb;
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public SitemapImporter(final Switchboard sb, final DigestURL sitemapURL, final CrawlProfile profileEntry) {
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assert sitemapURL != null;
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this.sb = sb;
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this.siteMapURL = sitemapURL;
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assert profileEntry != null;
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this.crawlingProfile = profileEntry;
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}
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@Override
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public void run() {
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try {
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logger.info("Start parsing sitemap file " + this.siteMapURL.toNormalform(true));
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sitemapParser.SitemapReader parser = sitemapParser.parse(this.siteMapURL, this.crawlingProfile.getAgent());
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parser.start();
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URLEntry item;
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while ((item = parser.take()) != sitemapParser.POISON_URLEntry) {
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process(item);
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}
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} catch (final Exception e) {
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logger.warn("Unable to parse sitemap file " + this.siteMapURL, e);
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}
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}
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public void process(sitemapParser.URLEntry entry) {
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// get the url hash
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byte[] nexturlhash = null;
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DigestURL url = null;
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try {
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url = new DigestURL(entry.url());
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nexturlhash = url.hash();
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} catch (final MalformedURLException e1) {
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}
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// check if the url is known and needs to be recrawled
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Date lastMod = entry.lastmod(null);
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if (lastMod != null) {
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HarvestProcess dbocc;
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try {
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dbocc = this.sb.urlExists(ASCII.String(nexturlhash));
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if (dbocc != null && dbocc == HarvestProcess.LOADED) {
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// the url was already loaded. we need to check the date
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final URIMetadataNode oldEntry = this.sb.index.fulltext().getMetadata(nexturlhash);
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if (oldEntry != null) {
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final Date modDate = oldEntry.moddate();
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// check if modDate is null
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if (modDate.after(lastMod)) return;
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}
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}
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} catch (IOException e) {
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ConcurrentLog.logException(e);
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}
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}
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// URL needs to crawled
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this.sb.crawlStacker.enqueueEntry(new Request(
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ASCII.getBytes(this.sb.peers.mySeed().hash),
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url,
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null, // this.siteMapURL.toNormalform(false),
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entry.url(),
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entry.lastmod(new Date()),
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this.crawlingProfile.handle(),
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0
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));
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logger.info("New URL '" + entry.url() + "' added for loading.");
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}
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}
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