// transferURL.java
// -----------------------
// part of the AnomicHTTPD caching proxy
// (C) by Michael Peter Christen; mc@yacy.net
// first published on http://www.anomic.de
// Frankfurt, Germany, 2004, 2005
//
// $LastChangedDate: 2011-03-15 02:03:35 +0100 (Di, 15. Mär 2011) $
// $LastChangedRevision: 7600 $
// $LastChangedBy: low012 $
//
// 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
// You must compile this file with
// javac -classpath .:../classes transferRWI.java
import java.io.IOException;
import java.text.ParseException;
import net.yacy.cora.date.GenericFormatter;
import net.yacy.cora.document.RSSMessage;
import net.yacy.cora.protocol.RequestHeader;
import net.yacy.kelondro.data.meta.URIMetadataRow;
import net.yacy.kelondro.logging.Log;
import net.yacy.repository.Blacklist;
import de.anomic.crawler.ResultURLs;
import de.anomic.crawler.ResultURLs.EventOrigin;
import de.anomic.search.Segments;
import de.anomic.search.Switchboard;
import de.anomic.server.serverCore;
import de.anomic.server.serverObjects;
import de.anomic.server.serverSwitch;
import de.anomic.yacy.yacyCore;
import de.anomic.yacy.yacyNetwork;
import de.anomic.yacy.yacySeed;
import de.anomic.yacy.yacyChannel;
public final class transferURL {
public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch env) throws InterruptedException {
final long start = System.currentTimeMillis();
long freshdate = 0;
try {freshdate = GenericFormatter.SHORT_DAY_FORMATTER.parse("20061101").getTime();} catch (final ParseException e1) {}
// return variable that accumulates replacements
final Switchboard sb = (Switchboard) env;
final serverObjects prop = new serverObjects();
if ((post == null) || (env == null)) return prop;
if (!yacyNetwork.authentifyRequest(post, env)) return prop;
// request values
final String iam = post.get("iam", ""); // seed hash of requester
final String youare = post.get("youare", ""); // seed hash of the target peer, needed for network stability
// final String key = post.get("key", ""); // transmission key
final int urlc = post.getInt("urlc", 0); // number of transported urls
final boolean granted = sb.getConfigBool("allowReceiveIndex", false);
final boolean blockBlacklist = sb.getConfigBool("indexReceiveBlockBlacklist", false);
// response values
String result = "";
String doublevalues = "0";
final yacySeed otherPeer = sb.peers.get(iam);
final String otherPeerName = iam + ":" + ((otherPeer == null) ? "NULL" : (otherPeer.getName() + "/" + otherPeer.getVersion()));
if ((youare == null) || (!youare.equals(sb.peers.mySeed().hash))) {
yacyCore.log.logInfo("Rejecting URLs from peer " + otherPeerName + ". Wrong target. Wanted peer=" + youare + ", iam=" + sb.peers.mySeed().hash);
result = "wrong_target";
} else if ((!granted) || (sb.isRobinsonMode())) {
yacyCore.log.logInfo("Rejecting URLs from peer " + otherPeerName + ". Not granted.");
result = "error_not_granted";
} else {
int received = 0;
int blocked = 0;
final int sizeBefore = sb.indexSegments.urlMetadata(Segments.Process.DHTIN).size();
// read the urls from the other properties and store
String urls;
URIMetadataRow lEntry;
for (int i = 0; i < urlc; i++) {
serverCore.checkInterruption();
// read new lurl-entry
urls = post.get("url" + i);
if (urls == null) {
if (yacyCore.log.isFine()) yacyCore.log.logFine("transferURL: got null URL-string from peer " + otherPeerName);
blocked++;
continue;
}
// parse new lurl-entry
lEntry = URIMetadataRow.importEntry(urls);
if (lEntry == null) {
yacyCore.log.logWarning("transferURL: received invalid URL (entry null) from peer " + otherPeerName + "\n\tURL Property: " + urls);
blocked++;
continue;
}
// check if entry is well-formed
final URIMetadataRow.Components metadata = lEntry.metadata();
if (metadata == null || metadata.url() == null) {
yacyCore.log.logWarning("transferURL: received invalid URL from peer " + otherPeerName + "\n\tURL Property: " + urls);
blocked++;
continue;
}
// check whether entry is too old
if (lEntry.freshdate().getTime() <= freshdate) {
if (yacyCore.log.isFine()) yacyCore.log.logFine("transerURL: received too old URL from peer " + otherPeerName + ": " + lEntry.freshdate());
blocked++;
continue;
}
// check if the entry is blacklisted
if ((blockBlacklist) && (Switchboard.urlBlacklist.isListed(Blacklist.BLACKLIST_DHT, metadata.url()))) {
if (yacyCore.log.isFine()) yacyCore.log.logFine("transferURL: blocked blacklisted URL '" + metadata.url().toNormalform(false, true) + "' from peer " + otherPeerName);
lEntry = null;
blocked++;
continue;
}
// check if the entry is in our network domain
final String urlRejectReason = sb.crawlStacker.urlInAcceptedDomain(metadata.url());
if (urlRejectReason != null) {
if (yacyCore.log.isFine()) yacyCore.log.logFine("transferURL: blocked URL '" + metadata.url() + "' (" + urlRejectReason + ") from peer " + otherPeerName);
lEntry = null;
blocked++;
continue;
}
// write entry to database
if (yacyCore.log.isFine()) yacyCore.log.logFine("Accepting URL " + i + "/" + urlc + " from peer " + otherPeerName + ": " + lEntry.metadata().url().toNormalform(true, false));
try {
sb.indexSegments.urlMetadata(Segments.Process.DHTIN).store(lEntry);
ResultURLs.stack(lEntry, iam.getBytes(), iam.getBytes(), EventOrigin.DHT_TRANSFER);
if (yacyCore.log.isFine()) yacyCore.log.logFine("transferURL: received URL '" + metadata.url().toNormalform(false, true) + "' from peer " + otherPeerName);
received++;
} catch (final IOException e) {
Log.logException(e);
}
}
sb.peers.mySeed().incRU(received);
// return rewrite properties
final int more = sb.indexSegments.urlMetadata(Segments.Process.DHTIN).size() - sizeBefore;
doublevalues = Integer.toString(received - more);
yacyCore.log.logInfo("Received " + received + " URLs from peer " + otherPeerName + " in " + (System.currentTimeMillis() - start) + " ms, blocked " + blocked + " URLs");
yacyChannel.channels(yacyChannel.DHTRECEIVE).addMessage(new RSSMessage("Received " + received + ", blocked " + blocked + " URLs from peer " + otherPeerName, "", otherPeer.hash));
if ((received - more) > 0) yacyCore.log.logSevere("Received " + doublevalues + " double URLs from peer " + otherPeerName);
result = "ok";
}
prop.put("double", doublevalues);
prop.put("result", result);
return prop;
}
}