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yacy_search_server/source/de/anomic/yacy/yacyPeerActions.java

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// yacyPeerActions.java
// -------------------------------------
// (C) by Michael Peter Christen; mc@anomic.de
// first published on http://www.anomic.de
// Frankfurt, Germany, 2005
//
// $LastChangedDate$
// $LastChangedRevision$
// $LastChangedBy$
//
// 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
//
// Using this software in any meaning (reading, learning, copying, compiling,
// running) means that you agree that the Author(s) is (are) not responsible
// for cost, loss of data or any harm that may be caused directly or indirectly
// by usage of this softare or this documentation. The usage of this software
// is on your own risk. The installation and usage (starting/running) of this
// software may allow other people or application to access your computer and
// any attached devices and is highly dependent on the configuration of the
// software which must be done by the user of the software; the author(s) is
// (are) also not responsible for proper configuration and usage of the
// software, even if provoked by documentation provided together with
// the software.
//
// Any changes to this file according to the GPL as documented in the file
// gpl.txt aside this file in the shipment you received can be done to the
// lines that follows this copyright notice here, but changes must not be
// done inside the copyright notive above. A re-distribution must contain
// the intact and unchanged copyright notice.
// Contributions and changes to the program code must be marked as such.
package de.anomic.yacy;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import de.anomic.http.httpHeader;
import de.anomic.http.httpc;
import de.anomic.plasma.plasmaCrawlNURL;
import de.anomic.plasma.plasmaSwitchboard;
import de.anomic.server.serverCore;
import de.anomic.server.serverDate;
import de.anomic.tools.nxTools;
public class yacyPeerActions {
private yacySeedDB seedDB;
private plasmaSwitchboard sb;
private HashSet actions;
private HashMap userAgents;
public long juniorConnects;
public long seniorConnects;
public long principalConnects;
public long disconnects;
private int bootstrapLoadTimeout;
public yacyPeerActions(yacySeedDB seedDB, plasmaSwitchboard switchboard) {
this.seedDB = seedDB;
this.sb = switchboard;
this.actions = new HashSet();
this.userAgents = new HashMap();
this.juniorConnects = 0;
this.seniorConnects = 0;
this.principalConnects = 0;
this.disconnects = 0;
this.bootstrapLoadTimeout = (int) switchboard.getConfigLong("bootstrapLoadTimeout", 6000);
}
public void deploy(yacyPeerAction action) {
actions.add(action);
}
public void updateMySeed() {
if (sb.getConfig("peerName", "anomic").equals("anomic")) {
// generate new peer name
sb.setConfig("peerName", yacySeed.makeDefaultPeerName());
}
seedDB.mySeed().put(yacySeed.NAME, sb.getConfig("peerName", "nameless"));
if ((serverCore.portForwardingEnabled) && (serverCore.portForwarding != null)) {
seedDB.mySeed().put(yacySeed.PORT, Integer.toString(serverCore.portForwarding.getPort()));
} else {
seedDB.mySeed().put(yacySeed.PORT, Integer.toString(serverCore.getPortNr(sb.getConfig("port", "8080"))));
}
long uptime = (System.currentTimeMillis() - serverCore.startupTime) / 1000;
long uptimediff = uptime - sb.lastseedcheckuptime;
long indexedcdiff = sb.indexedPages - sb.lastindexedPages;
//double requestcdiff = sb.requestedQueries - sb.lastrequestedQueries;
if (uptimediff > 300 || uptimediff <= 0 || sb.lastseedcheckuptime == -1 ) {
sb.lastseedcheckuptime = uptime;
sb.lastindexedPages = sb.indexedPages;
sb.lastrequestedQueries = sb.requestedQueries;
}
//the speed of indexing (pages/minute) of the peer
sb.totalPPM = (int) (sb.indexedPages * 60 / Math.max(uptime, 1));
seedDB.mySeed().put(yacySeed.ISPEED, Long.toString(Math.round(Math.max((float) indexedcdiff, 0f) * 60f / Math.max((float) uptimediff, 1f))));
sb.totalQPM = sb.requestedQueries * 60d / Math.max((double) uptime, 1d);
seedDB.mySeed().put(yacySeed.RSPEED, Double.toString(sb.totalQPM /*Math.max((float) requestcdiff, 0f) * 60f / Math.max((float) uptimediff, 1f)*/ ));
seedDB.mySeed().put(yacySeed.UPTIME, Long.toString(uptime/60)); // the number of minutes that the peer is up in minutes/day (moving average MA30)
seedDB.mySeed().put(yacySeed.LCOUNT, Integer.toString(sb.wordIndex.loadedURL.size())); // the number of links that the peer has stored (LURL's)
seedDB.mySeed().put(yacySeed.NCOUNT, Integer.toString(sb.crawlQueues.noticeURL.size())); // the number of links that the peer has noticed, but not loaded (NURL's)
seedDB.mySeed().put(yacySeed.RCOUNT, Integer.toString(sb.crawlQueues.noticeURL.stackSize(plasmaCrawlNURL.STACK_TYPE_LIMIT))); // the number of links that the peer provides for remote crawling (ZURL's)
seedDB.mySeed().put(yacySeed.ICOUNT, Integer.toString(sb.wordIndex.size())); // the minimum number of words that the peer has indexed (as it says)
seedDB.mySeed().put(yacySeed.SCOUNT, Integer.toString(seedDB.sizeConnected())); // the number of seeds that the peer has stored
seedDB.mySeed().put(yacySeed.CCOUNT, Double.toString(((int) ((seedDB.sizeConnected() + seedDB.sizeDisconnected() + seedDB.sizePotential()) * 60.0 / (uptime + 1.01)) * 100) / 100.0)); // the number of clients that the peer connects (as connects/hour)
seedDB.mySeed().put(yacySeed.VERSION, sb.getConfig("version", ""));
if (seedDB.mySeed().get(yacySeed.PEERTYPE,"").equals(yacySeed.PEERTYPE_PRINCIPAL)) {
// attach information about seed location
seedDB.mySeed().put("seedURL", sb.getConfig("seedURL", ""));
}
seedDB.mySeed().setFlagDirectConnect(true);
seedDB.mySeed().setLastSeenUTC();
seedDB.mySeed().put(yacySeed.UTC, serverDate.UTCDiffString());
seedDB.mySeed().setFlagAcceptRemoteCrawl(sb.getConfig("crawlResponse", "").equals("true"));
seedDB.mySeed().setFlagAcceptRemoteIndex(sb.getConfig("allowReceiveIndex", "").equals("true"));
//mySeed.setFlagAcceptRemoteIndex(true);
}
public void saveMySeed() {
try {
seedDB.mySeed().save(sb.getOwnSeedFile());
} catch (IOException e) {}
}
public void loadSeedLists() {
// uses the superseed to initialize the database with known seeds
yacySeed ys;
String seedListFileURL;
yacyURL url;
ArrayList seedList;
Iterator enu;
int lc;
int sc = seedDB.sizeConnected();
httpHeader header;
yacyCore.log.logInfo("BOOTSTRAP: " + sc + " seeds known from previous run");
// - use the superseed to further fill up the seedDB
int ssc = 0, c = 0;
while (true) {
if (Thread.currentThread().isInterrupted()) break;
seedListFileURL = sb.getConfig("network.unit.bootstrap.seedlist" + c, "");
if (seedListFileURL.length() == 0) break;
c++;
if (
seedListFileURL.startsWith("http://") ||
seedListFileURL.startsWith("https://")
) {
// load the seed list
try {
httpHeader reqHeader = new httpHeader();
reqHeader.put(httpHeader.PRAGMA,"no-cache");
reqHeader.put(httpHeader.CACHE_CONTROL,"no-cache");
url = new yacyURL(seedListFileURL, null);
long start = System.currentTimeMillis();
header = httpc.whead(url, url.getHost(), this.bootstrapLoadTimeout, null, null, this.sb.remoteProxyConfig,reqHeader);
long loadtime = System.currentTimeMillis() - start;
if (header == null) {
if (loadtime > this.bootstrapLoadTimeout) {
yacyCore.log.logWarning("BOOTSTRAP: seed-list URL " + seedListFileURL + " not available, time-out after " + loadtime + " milliseconds");
} else {
yacyCore.log.logWarning("BOOTSTRAP: seed-list URL " + seedListFileURL + " not available, no content");
}
} else if (header.lastModified() == null) {
yacyCore.log.logWarning("BOOTSTRAP: seed-list URL " + seedListFileURL + " not usable, last-modified is missing");
} else if ((header.age() > 86400000) && (ssc > 0)) {
yacyCore.log.logInfo("BOOTSTRAP: seed-list URL " + seedListFileURL + " too old (" + (header.age() / 86400000) + " days)");
} else {
ssc++;
seedList = nxTools.strings(httpc.wget(url, url.getHost(), this.bootstrapLoadTimeout, null, null, this.sb.remoteProxyConfig,reqHeader, null), "UTF-8");
enu = seedList.iterator();
lc = 0;
while (enu.hasNext()) {
ys = yacySeed.genRemoteSeed((String) enu.next(), null, true);
if ((ys != null) && (ys.isProper() == null) &&
((!seedDB.mySeedIsDefined()) || (seedDB.mySeed().hash != ys.hash))) {
if (connectPeer(ys, false)) lc++;
//seedDB.writeMap(ys.hash, ys.getMap(), "init");
//System.out.println("BOOTSTRAP: received peer " + ys.get(yacySeed.NAME, "anonymous") + "/" + ys.getAddress());
//lc++;
}
}
yacyCore.log.logInfo("BOOTSTRAP: " + lc + " seeds from seed-list URL " + seedListFileURL + ", AGE=" + (header.age() / 3600000) + "h");
}
} catch (IOException e) {
// this is when wget fails, commonly because of timeout
yacyCore.log.logWarning("BOOTSTRAP: failed (1) to load seeds from seed-list URL " + seedListFileURL + ": " + e.getMessage(), e);
} catch (Exception e) {
// this is when wget fails; may be because of missing internet connection
yacyCore.log.logSevere("BOOTSTRAP: failed (2) to load seeds from seed-list URL " + seedListFileURL + ": " + e.getMessage(), e);
}
}
}
yacyCore.log.logInfo("BOOTSTRAP: " + (seedDB.sizeConnected() - sc) + " new seeds while bootstraping.");
}
private synchronized boolean connectPeer(yacySeed seed, boolean direct) {
// store a remote peer's seed
// returns true if the peer is new and previously unknown
if (seed == null) {
yacyCore.log.logSevere("connect: WRONG seed (NULL)");
return false;
}
final String error = seed.isProper();
if (error != null) {
yacyCore.log.logSevere("connect: WRONG seed (" + seed.getName() + "/" + seed.hash + "): " + error);
return false;
}
if ((this.seedDB.mySeedIsDefined()) && (seed.hash.equals(this.seedDB.mySeed().hash))) {
yacyCore.log.logInfo("connect: SELF reference " + seed.getPublicAddress());
return false;
}
final String peerType = seed.get(yacySeed.PEERTYPE, yacySeed.PEERTYPE_VIRGIN);
if ((peerType.equals(yacySeed.PEERTYPE_VIRGIN)) || (peerType.equals(yacySeed.PEERTYPE_JUNIOR))) {
// reject unqualified seeds
yacyCore.log.logFine("connect: rejecting NOT QUALIFIED " + peerType + " seed " + seed.getName());
return false;
}
final yacySeed doubleSeed = this.seedDB.lookupByIP(seed.getInetAddress(), true, false, false);
if ((doubleSeed != null) && (doubleSeed.getPort() == seed.getPort()) && (!(doubleSeed.hash.equals(seed.hash)))) {
// a user frauds with his peer different peer hashes
yacyCore.log.logFine("connect: rejecting FRAUD (double hashes " + doubleSeed.hash + "/" + seed.hash + " on same port " + seed.getPort() + ") peer " + seed.getName());
return false;
}
if (seed.get(yacySeed.LASTSEEN, "").length() != 14) {
// hack for peers that do not have a LastSeen date
seed.setLastSeenUTC();
yacyCore.log.logFine("connect: reset wrong date (" + seed.getName() + "/" + seed.hash + ")");
}
// connection time
final long nowUTC0Time = System.currentTimeMillis(); // is better to have this value in a variable for debugging
long ctimeUTC0 = seed.getLastSeenUTC();
if (ctimeUTC0 > nowUTC0Time) {
// the peer is future-dated, correct it
seed.setLastSeenUTC();
ctimeUTC0 = nowUTC0Time;
assert (seed.getLastSeenUTC() - ctimeUTC0 < 100);
}
if (Math.abs(nowUTC0Time - ctimeUTC0) > 60 * 60 * 24 * 1000) {
// the new connection is out-of-age, we reject the connection
yacyCore.log.logFine("connect: rejecting out-dated peer '" + seed.getName() + "' from " + seed.getPublicAddress() + "; nowUTC0=" + nowUTC0Time + ", seedUTC0=" + ctimeUTC0 + ", TimeDiff=" + serverDate.formatInterval(Math.abs(nowUTC0Time - ctimeUTC0)));
return false;
}
// disconnection time
long dtimeUTC0;
final yacySeed disconnectedSeed = seedDB.getDisconnected(seed.hash);
if (disconnectedSeed == null) {
dtimeUTC0 = 0; // never disconnected: virtually disconnected maximum time ago
} else {
dtimeUTC0 = disconnectedSeed.getLong("dct", 0);
}
if (direct) {
// remember the moment
// Date applies the local UTC offset, which is wrong
// we correct that by subtracting the local offset and adding
// the remote offset.
seed.setLastSeenUTC();
seed.setFlagDirectConnect(true);
} else {
// set connection flag
if (Math.abs(nowUTC0Time - ctimeUTC0) > 120000) seed.setFlagDirectConnect(false); // 2 minutes
}
// update latest version number
if (seed.getVersion() > yacyVersion.latestRelease) yacyVersion.latestRelease = seed.getVersion();
// prepare to update
if (disconnectedSeed != null) {
// if the indirect connect aims to announce a peer that we know
// has been disconnected then we compare the dates:
// if the new peer has a LastSeen date, and that date is before
// the disconnection date, then we ignore the new peer
if (!direct) {
if (ctimeUTC0 < dtimeUTC0) {
// the disconnection was later, we reject the connection
yacyCore.log.logFine("connect: rejecting disconnected peer '" + seed.getName() + "' from " + seed.getPublicAddress());
return false;
}
}
// this is a return of a lost peer
yacyCore.log.logFine("connect: returned KNOWN " + peerType + " peer '" + seed.getName() + "' from " + seed.getPublicAddress());
this.seedDB.addConnected(seed);
return true;
} else {
final yacySeed connectedSeed = this.seedDB.getConnected(seed.hash);
if (connectedSeed != null) {
// the seed is known: this is an update
try {
// if the old LastSeen date is later then the other
// info, then we reject the info
if ((ctimeUTC0 < (connectedSeed.getLastSeenUTC())) && (!direct)) {
yacyCore.log.logFine("connect: rejecting old info about peer '" + seed.getName() + "'");
return false;
}
if (connectedSeed.getName() != seed.getName()) {
// TODO: update seed name lookup cache
}
} catch (NumberFormatException e) {
yacyCore.log.logFine("connect: rejecting wrong peer '" + seed.getName() + "' from " + seed.getPublicAddress() + ". Cause: " + e.getMessage());
return false;
}
yacyCore.log.logFine("connect: updated KNOWN " + ((direct) ? "direct " : "") + peerType + " peer '" + seed.getName() + "' from " + seed.getPublicAddress());
seedDB.addConnected(seed);
return true;
} else {
// the seed is new
if ((seedDB.mySeedIsDefined()) && (seed.get(yacySeed.IP, "127.0.0.1").equals(this.seedDB.mySeed().get(yacySeed.IP, "127.0.0.1")))) {
// seed from the same IP as the calling client: can be
// the case if there runs another one over a NAT
yacyCore.log.logFine("connect: saved NEW seed (myself IP) " + seed.getPublicAddress());
} else {
// completely new seed
yacyCore.log.logFine("connect: saved NEW " + peerType + " peer '" + seed.getName() + "' from " + seed.getPublicAddress());
}
if (peerType.equals(yacySeed.PEERTYPE_SENIOR))
this.seniorConnects++; // update statistics
if (peerType.equals(yacySeed.PEERTYPE_PRINCIPAL))
this.principalConnects++; // update statistics
this.seedDB.addConnected(seed);
return true;
}
}
}
private final void disconnectPeer(yacySeed seed, String cause) {
// we do this if we did not get contact with the other peer
yacyCore.log.logFine("connect: no contact to a " + seed.get(yacySeed.PEERTYPE, yacySeed.PEERTYPE_VIRGIN) + " peer '" + seed.getName() + "' at " + seed.getPublicAddress() + ". Cause: " + cause);
synchronized (seedDB) {
if (!seedDB.hasDisconnected(seed.hash)) { disconnects++; }
seed.put("dct", Long.toString(System.currentTimeMillis()));
seedDB.addDisconnected(seed); // update info
}
}
public boolean peerArrival(yacySeed peer, boolean direct) {
if (peer == null) return false;
boolean res = connectPeer(peer, direct);
// perform all actions if peer is effective new
if (res) {
Iterator i = actions.iterator();
while (i.hasNext()) ((yacyPeerAction) i.next()).processPeerArrival(peer, direct);
}
return res;
}
public void peerDeparture(yacySeed peer, String cause) {
if (peer == null) return;
disconnectPeer(peer, cause);
// perform all actions
Iterator i = actions.iterator();
while (i.hasNext()) ((yacyPeerAction) i.next()).processPeerDeparture(peer);
}
public void peerPing(yacySeed peer) {
if (peer == null) return;
// this is called only if the peer has junior status
seedDB.addPotential(peer);
// perform all actions
Iterator i = actions.iterator();
while (i.hasNext()) ((yacyPeerAction) i.next()).processPeerPing(peer);
}
public void setUserAgent(String IP, String userAgent) {
userAgents.put(IP, userAgent);
}
public String getUserAgent(String IP) {
String userAgent = (String) userAgents.get(IP);
return (userAgent == null) ? "" : userAgent;
}
}
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