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291 lines
14 KiB
291 lines
14 KiB
// transferRWI.java
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// -----------------------
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// part of the AnomicHTTPD caching proxy
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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, 2004, 2005
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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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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// You must compile this file with
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// javac -classpath .:../classes transferRWI.java
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.Set;
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import net.yacy.cora.document.encoding.ASCII;
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import net.yacy.cora.document.encoding.UTF8;
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import net.yacy.cora.document.feed.RSSMessage;
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import net.yacy.cora.federate.yacy.Distribution;
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import net.yacy.cora.protocol.HeaderFramework;
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import net.yacy.cora.protocol.RequestHeader;
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import net.yacy.cora.storage.HandleSet;
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import net.yacy.cora.util.ConcurrentLog;
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import net.yacy.cora.util.Memory;
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import net.yacy.cora.util.SpaceExceededException;
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import net.yacy.kelondro.data.word.Word;
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import net.yacy.kelondro.data.word.WordReferenceRow;
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import net.yacy.kelondro.index.RowHandleSet;
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import net.yacy.kelondro.util.FileUtils;
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import net.yacy.kelondro.util.MemoryControl;
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import net.yacy.peers.EventChannel;
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import net.yacy.peers.Network;
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import net.yacy.peers.Protocol;
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import net.yacy.peers.Seed;
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import net.yacy.repository.Blacklist.BlacklistType;
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import net.yacy.search.Switchboard;
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import net.yacy.search.SwitchboardConstants;
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import net.yacy.server.serverObjects;
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import net.yacy.server.serverSwitch;
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public final class transferRWI {
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public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch env) {
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// return variable that accumulates replacements
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final Switchboard sb = (Switchboard) env;
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// remember the peer contact for peer statistics
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final String clientip = header.get(HeaderFramework.CONNECTION_PROP_CLIENTIP, "<unknown>"); // read an artificial header addendum
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final String userAgent = header.get(HeaderFramework.USER_AGENT, "<unknown>");
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sb.peers.peerActions.setUserAgent(clientip, userAgent);
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final serverObjects prop = new serverObjects();
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final String contentType = header.getContentType();
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prop.put("unknownURL", "");
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prop.put("pause", 60000);
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String result = "";
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if ((post == null) || (env == null)) {
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result = "post or env is null!";
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logWarning(contentType, result);
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prop.put("result", result);
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return prop;
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}
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if (!Protocol.authentifyRequest(post, env)) {
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result = "not authentified";
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prop.put("result", result);
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return prop;
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}
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if (!post.containsKey("wordc")) {
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result = "missing wordc";
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prop.put("result", result);
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return prop;
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}
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if (!post.containsKey("entryc")) {
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result = "missing entryc";
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prop.put("result", result);
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return prop;
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}
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if (!post.containsKey("indexes")) {
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result = "missing indexes";
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prop.put("result", result);
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return prop;
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}
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// load tests
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if (Memory.load() > 2.0 || MemoryControl.shortStatus()) {
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// check also Protocol.metadataRetrievalRunning.get() > 0 ?
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result = "too high load"; // don't tell too much details
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prop.put("result", result);
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return prop;
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}
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// request values
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final String iam = post.get("iam", ""); // seed hash of requester
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final String youare = post.get("youare", ""); // seed hash of the target peer, needed for network stability
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// final String key = (String) post.get("key", ""); // transmission key
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final int wordc = post.getInt("wordc", 0); // number of different words
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final int entryc = post.getInt("entryc", 0); // number of entries in indexes
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byte[] indexes = post.get("indexes", "").getBytes(); // the indexes, as list of word entries
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boolean granted = sb.getConfigBool("allowReceiveIndex", false);
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final boolean blockBlacklist = sb.getConfigBool(SwitchboardConstants.INDEX_RECEIVE_BLOCK_BLACKLIST, false);
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final long cachelimit = sb.getConfigLong(SwitchboardConstants.WORDCACHE_MAX_COUNT, 100000);
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final Seed otherPeer = sb.peers.get(iam);
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final String otherPeerName = iam + ":" + ((otherPeer == null) ? "NULL" : (otherPeer.getName() + "/" + otherPeer.getVersion()));
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// response values
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int pause = 0;
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result = "ok";
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final StringBuilder unknownURLs = new StringBuilder(6000);
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double load = Memory.load();
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float maxload = sb.getConfigFloat(SwitchboardConstants.INDEX_DIST_LOADPREREQ, 2.0f);
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if (load > maxload) {
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// too high local load. this is bad but we must reject this to protect ourself!
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sb.getLog().info("Rejecting RWIs from peer " + otherPeerName + ", system has too high load = " + load + ", maxload = " + maxload);
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result = "not_granted";
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pause = (int) (load * 20000);
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} else if ((youare == null) || (!youare.equals(sb.peers.mySeed().hash))) {
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sb.getLog().info("Rejecting RWIs from peer " + otherPeerName + ". Wrong target. Wanted peer=" + youare + ", iam=" + sb.peers.mySeed().hash);
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result = "wrong_target";
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pause = 0;
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} else if (otherPeer == null) {
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// we dont want to receive indexes
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sb.getLog().info("Rejecting RWIs from peer " + otherPeerName + ". Not granted. Other Peer is unknown");
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result = "not_granted";
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pause = 60000;
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} else if (!granted) {
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// we dont want to receive indexes
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sb.getLog().info("Rejecting RWIs from peer " + otherPeerName + ". Granted is false");
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result = "not_granted";
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pause = 60000;
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} else if (sb.isRobinsonMode()) {
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// we dont want to receive indexes
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sb.getLog().info("Rejecting RWIs from peer " + otherPeerName + ". Not granted. This peer is in robinson mode");
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result = "not_granted";
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pause = 60000;
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} else if (sb.index.RWIBufferCount() > cachelimit) {
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// we are too busy to receive indexes
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sb.getLog().info("Rejecting RWIs from peer " + otherPeerName + ". We are too busy (buffersize=" + sb.index.RWIBufferCount() + ").");
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granted = false; // don't accept more words if there are too many words to flush
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result = "busy";
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pause = 60000;
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} else if (otherPeer.getVersion() < 0.75005845 && otherPeer.getVersion() >= 0.75005821) {
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// version that sends [B@... hashes
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sb.getLog().info("Rejecting RWIs from peer " + otherPeerName + ". Bad version.");
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result = "not_granted";
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pause = 1800000;
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} else {
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// we want and can receive indexes
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// log value status (currently added to find outOfMemory error
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if (sb.getLog().isFine()) sb.getLog().fine("Processing " + indexes.length + " bytes / " + wordc + " words / " + entryc + " entries from " + otherPeerName);
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final long startProcess = System.currentTimeMillis();
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// decode request
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//System.out.println("STRINGS " + UTF8.String(indexes));
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final Iterator<String> it = FileUtils.strings(indexes);
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// free memory
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indexes = null;
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// now parse the Strings in the value-vector and write index entries
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String estring;
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int p;
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String wordHash;
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byte[] urlHash;
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WordReferenceRow iEntry;
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final HandleSet unknownURL = new RowHandleSet(Word.commonHashLength, Word.commonHashOrder, 0);
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final HandleSet knownURL = new RowHandleSet(Word.commonHashLength, Word.commonHashOrder, 0);
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final ArrayList<String> wordhashes = new ArrayList<String>();
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int received = 0;
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int blocked = 0;
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int count = 0;
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Set<String> testids = new HashSet<String>();
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while (it.hasNext()) {
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estring = it.next();
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count++;
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if (count > 1000) break; // protection against flooding
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// check if RWI entry is well-formed
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p = estring.indexOf('{',0);
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if (p < 0 || estring.indexOf("x=",0) < 0 || !(estring.indexOf("[B@",0) < 0)) {
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blocked++;
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continue;
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}
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wordHash = estring.substring(0, p);
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wordhashes.add(wordHash);
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iEntry = new WordReferenceRow(estring.substring(p));
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urlHash = iEntry.urlhash();
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// block blacklisted entries
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if ((blockBlacklist) && (Switchboard.urlBlacklist.hashInBlacklistedCache(BlacklistType.DHT, urlHash))) {
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Network.log.fine("transferRWI: blocked blacklisted URLHash '" + ASCII.String(urlHash) + "' from peer " + otherPeerName);
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blocked++;
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continue;
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}
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// check if the entry is in our network domain
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final String urlRejectReason = sb.crawlStacker.urlInAcceptedDomainHash(urlHash);
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if (urlRejectReason != null) {
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Network.log.warn("transferRWI: blocked URL hash '" + ASCII.String(urlHash) + "' (" + urlRejectReason + ") from peer " + otherPeerName + "; peer is suspected to be a spam-peer (or something is wrong)");
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//if (yacyCore.log.isFine()) yacyCore.log.logFine("transferRWI: blocked URL hash '" + urlHash + "' (" + urlRejectReason + ") from peer " + otherPeerName);
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blocked++;
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continue;
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}
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// learn entry
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try {
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sb.index.storeRWI(ASCII.getBytes(wordHash), iEntry);
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} catch (final Exception e) {
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ConcurrentLog.logException(e);
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}
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// check if we need to ask for the corresponding URL
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testids.add(ASCII.String(urlHash));
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received++;
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}
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for (String id: testids) {
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try {
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try {
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if (sb.index.fulltext().getLoadTime(id) >= 0) {
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knownURL.put(ASCII.getBytes(id));
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} else {
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unknownURL.put(ASCII.getBytes(id));
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}
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} catch (IOException e) {
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ConcurrentLog.logException(e);
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unknownURL.put(ASCII.getBytes(id));
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}
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} catch (final SpaceExceededException e) {
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sb.getLog().warn("transferRWI: DB-Error while trying to determine if URL with hash '" + id + "' is known.", e);
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}
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}
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sb.peers.mySeed().incRI(received);
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// finally compose the unknownURL hash list
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final Iterator<byte[]> bit = unknownURL.iterator();
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unknownURLs.ensureCapacity(unknownURL.size() * 25);
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while (bit.hasNext()) {
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unknownURLs.append(UTF8.String(bit.next())).append(',');
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}
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if (unknownURLs.length() > 0) { unknownURLs.setLength(unknownURLs.length() - 1); }
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if (wordhashes.isEmpty() || received == 0) {
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sb.getLog().info("Received 0 RWIs from " + otherPeerName + ", processed in " + (System.currentTimeMillis() - startProcess) + " milliseconds, requesting " + unknownURL.size() + " URLs, blocked " + blocked + " RWIs");
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} else {
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final String firstHash = wordhashes.get(0);
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final String lastHash = wordhashes.get(wordhashes.size() - 1);
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final long avdist = (Distribution.horizontalDHTDistance(firstHash.getBytes(), ASCII.getBytes(sb.peers.mySeed().hash)) + Distribution.horizontalDHTDistance(lastHash.getBytes(), ASCII.getBytes(sb.peers.mySeed().hash))) / 2;
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sb.getLog().info("Received " + received + " RWIs, " + wordc + " Words [" + firstHash + " .. " + lastHash + "], processed in " + (System.currentTimeMillis() - startProcess) + " milliseconds, " + avdist + ", blocked " + blocked + ", requesting " + unknownURL.size() + "/" + received+ " URLs from " + otherPeerName);
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EventChannel.channels(EventChannel.DHTRECEIVE).addMessage(new RSSMessage("Received " + received + " RWIs, " + wordc + " Words [" + firstHash + " .. " + lastHash + "], processed in " + (System.currentTimeMillis() - startProcess) + " milliseconds, " + avdist + ", blocked " + blocked + ", requesting " + unknownURL.size() + "/" + received + " URLs from " + otherPeerName, "", otherPeer.hash));
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}
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result = "ok";
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pause = (int) (sb.index.RWIBufferCount() * 20000 / sb.getConfigLong(SwitchboardConstants.WORDCACHE_MAX_COUNT, 100000)); // estimation of necessary pause time
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}
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prop.put("unknownURL", unknownURLs.toString());
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prop.put("result", result);
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prop.put("pause", pause);
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// return rewrite properties
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return prop;
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}
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/**
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* @param requestIdentifier
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* @param msg
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*/
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private static void logWarning(final String requestIdentifier, final String msg) {
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ConcurrentLog.warn("transferRWI", requestIdentifier +" "+ msg);
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}
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}
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