// webstructure.java
// ------------
// (C) 2009 by Michael Peter Christen; mc@yacy.net
// first published 01.05.2008 on http://yacy.net
//
// $LastChangedDate: 2009-03-16 19:08:43 +0100 (Mo, 16 Mrz 2009) $
// $LastChangedRevision: 5723 $
// $LastChangedBy: borg-0300 $
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.Date;
import java.util.Iterator;
import java.util.Map;
import net.yacy.cora.date.GenericFormatter;
import net.yacy.cora.document.ASCII;
import net.yacy.cora.document.MultiProtocolURI;
import net.yacy.cora.protocol.RequestHeader;
import net.yacy.cora.services.federated.yacy.CacheStrategy;
import net.yacy.kelondro.data.citation.CitationReference;
import net.yacy.kelondro.data.meta.DigestURI;
import net.yacy.kelondro.logging.Log;
import net.yacy.kelondro.order.Base64Order;
import net.yacy.kelondro.rwi.IndexCell;
import net.yacy.kelondro.rwi.ReferenceContainer;
import net.yacy.peers.graphics.WebStructureGraph;
import net.yacy.search.Switchboard;
import net.yacy.search.index.Segments;
import de.anomic.server.serverObjects;
import de.anomic.server.serverSwitch;
public class webstructure {
public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch env) {
final serverObjects prop = new serverObjects();
final Switchboard sb = (Switchboard) env;
String about = post == null ? null : post.get("about", null); // may be a URL, a URL hash or a domain hash
prop.put("out", 0);
prop.put("in", 0);
prop.put("references", 0);
prop.put("citations", 0);
boolean authenticated = sb.adminAuthenticated(header) >= 2;
if (about != null) {
DigestURI url = null;
byte[] urlhash = null;
String hosthash = null;
if (about.length() == 6 && Base64Order.enhancedCoder.wellformed(ASCII.getBytes(about))) {
hosthash = about;
} else if (about.length() == 12 && Base64Order.enhancedCoder.wellformed(ASCII.getBytes(about))) {
urlhash = ASCII.getBytes(about);
hosthash = about.substring(6);
url = authenticated ? sb.getURL(Segments.Process.PUBLIC, urlhash) : null;
} else if (authenticated && about.length() > 0) {
// consider "about" as url or hostname
try {
url = new DigestURI(about.indexOf("://") >= 0 ? about : "http://" + about); // accept also domains
urlhash = url.hash();
hosthash = ASCII.String(urlhash, 6, 6);
} catch (MalformedURLException e) {
}
}
if (hosthash != null) {
prop.put("out", 1);
prop.put("in", 1);
WebStructureGraph.StructureEntry sentry = sb.webStructure.outgoingReferences(hosthash);
if (sentry != null) {
reference(prop, "out", 0, sentry, sb.webStructure);
prop.put("out_domains", 1);
} else {
prop.put("out_domains", 0);
}
sentry = sb.webStructure.incomingReferences(hosthash);
if (sentry != null) {
reference(prop, "in", 0, sentry, sb.webStructure);
prop.put("in_domains", 1);
} else {
prop.put("in_domains", 0);
}
}
if (urlhash != null) {
// anchors
prop.put("references", 1);
net.yacy.document.Document scraper = null;
if (url != null) try {
scraper = sb.loader.loadDocument(url, CacheStrategy.IFEXIST);
} catch (final IOException e) {
Log.logException(e);
}
if (scraper != null) {
prop.put("references_count", 1);
prop.put("references_documents", 1);
prop.put("references_documents_0_hash", urlhash);
prop.put("references_documents_0_count", scraper.inboundLinks().size() + scraper.outboundLinks().size());
prop.put("references_documents_0_date", GenericFormatter.SHORT_DAY_FORMATTER.format(new Date()));
prop.put("references_documents_0_urle", url == null ? 0 : 1);
if (url != null) prop.putXML("references_documents_0_urle_url", url.toNormalform(true, false));
int d = 0;
Iterator<MultiProtocolURI> i = scraper.inboundLinks().iterator();
while (i.hasNext()) {
DigestURI refurl = new DigestURI(i.next());
byte[] refhash = refurl.hash();
prop.putXML("references_documents_0_anchors_" + d + "_url", refurl.toNormalform(true, false));
prop.put("references_documents_0_anchors_" + d + "_hash", refhash);
prop.put("references_documents_0_anchors_" + d + "_outbound", 0);
d++;
}
i = scraper.outboundLinks().iterator();
while (i.hasNext()) {
DigestURI refurl = new DigestURI(i.next());
byte[] refhash = refurl.hash();
prop.putXML("references_documents_0_anchors_" + d + "_url", refurl.toNormalform(true, false));
prop.put("references_documents_0_anchors_" + d + "_hash", refhash);
prop.put("references_documents_0_anchors_" + d + "_outbound", 1);
d++;
}
prop.put("references_documents_0_count", d);
prop.put("references_documents_0_anchors", d);
} else {
prop.put("references_count", 0);
prop.put("references_documents", 0);
}
// citations
prop.put("citations", 1);
IndexCell<CitationReference> citationReferences = sb.indexSegments.segment(Segments.Process.PUBLIC).urlCitation();
ReferenceContainer<CitationReference> citations = null;
// citationReferences.count(urlhash) would give to the number of references good for ranking
try {
citations = citationReferences.get(urlhash, null);
} catch (IOException e) {
}
if (citations != null) {
prop.put("citations_count", 1);
prop.put("citations_documents", 1);
prop.put("citations_documents_0_hash", urlhash);
prop.put("citations_documents_0_count", citations.size());
prop.put("citations_documents_0_date", GenericFormatter.SHORT_DAY_FORMATTER.format(new Date(citations.lastWrote())));
prop.put("citations_documents_0_urle", url == null ? 0 : 1);
if (url != null) prop.putXML("citations_documents_0_urle_url", url.toNormalform(true, false));
int d = 0;
Iterator<CitationReference> i = citations.entries();
while (i.hasNext()) {
CitationReference cr = i.next();
byte[] refhash = cr.urlhash();
DigestURI refurl = authenticated ? sb.getURL(Segments.Process.PUBLIC, refhash) : null;
prop.put("citations_documents_0_anchors_" + d + "_urle", refurl == null ? 0 : 1);
if (refurl != null) prop.putXML("citations_documents_0_anchors_" + d + "_urle_url", refurl.toNormalform(true, false));
prop.put("citations_documents_0_anchors_" + d + "_urle_hash", refhash);
prop.put("citations_documents_0_anchors_" + d + "_urle_date", GenericFormatter.SHORT_DAY_FORMATTER.format(new Date(cr.lastModified())));
d++;
}
prop.put("citations_documents_0_count", d);
prop.put("citations_documents_0_anchors", d);
} else {
prop.put("citations_count", 0);
prop.put("citations_documents", 0);
}
}
} else if (authenticated) {
// show a complete list of link structure informations in case that the user is authenticated
final boolean latest = ((post == null) ? false : post.containsKey("latest"));
final Iterator<WebStructureGraph.StructureEntry> i = sb.webStructure.structureEntryIterator(latest);
int c = 0;
WebStructureGraph.StructureEntry sentry;
while (i.hasNext()) {
sentry = i.next();
reference(prop, "out", c, sentry, sb.webStructure);
c++;
}
prop.put("out_domains", c);
prop.put("out", 1);
if (latest) sb.webStructure.joinOldNew();
} else {
// not-authenticated users show nothing
prop.put("out_domains", 0);
prop.put("out", 1);
}
prop.put("out_maxref", WebStructureGraph.maxref);
prop.put("maxhosts", WebStructureGraph.maxhosts);
// return rewrite properties
return prop;
}
public static void reference(serverObjects prop, String prefix, int c, WebStructureGraph.StructureEntry sentry, WebStructureGraph ws) {
prop.put(prefix + "_domains_" + c + "_hash", sentry.hosthash);
prop.put(prefix + "_domains_" + c + "_domain", sentry.hostname);
prop.put(prefix + "_domains_" + c + "_date", sentry.date);
Iterator<Map.Entry<String, Integer>> k = sentry.references.entrySet().iterator();
Map.Entry<String, Integer> refentry;
String refdom, refhash;
Integer refcount;
int d = 0;
refloop: while (k.hasNext()) {
refentry = k.next();
refhash = refentry.getKey();
refdom = ws.hostHash2hostName(refhash);
if (refdom == null) continue refloop;
prop.put(prefix + "_domains_" + c + "_citations_" + d + "_refhash", refhash);
prop.put(prefix + "_domains_" + c + "_citations_" + d + "_refdom", refdom);
refcount = refentry.getValue();
prop.put(prefix + "_domains_" + c + "_citations_" + d + "_refcount", refcount.intValue());
d++;
}
prop.put(prefix + "_domains_" + c + "_citations", d);
}
}