mirror of
https://github.com/yacy/yacy_search_server.git
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1d8d51075c
- removed the plasma package. The name of that package came from a very early pre-version of YaCy, even before YaCy was named AnomicHTTPProxy. The Proxy project introduced search for cache contents using class files that had been developed during the plasma project. Information from 2002 about plasma can be found here: http://web.archive.org/web/20020802110827/http://anomic.de/AnomicPlasma/index.html We stil have one class that comes mostly unchanged from the plasma project, the Condenser class. But this is now part of the document package and all other classes in the plasma package can be assigned to other packages. - cleaned up the http package: better structure of that class and clean isolation of server and client classes. The old HTCache becomes part of the client sub-package of http. - because the plasmaSwitchboard is now part of the search package all servlets had to be touched to declare a different package source. git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@6232 6c8d7289-2bf4-0310-a012-ef5d649a1542
244 lines
12 KiB
Java
244 lines
12 KiB
Java
// 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.HashSet;
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import java.util.Iterator;
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import java.util.List;
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import de.anomic.content.RSSMessage;
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import de.anomic.data.Blacklist;
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import de.anomic.document.parser.xml.RSSFeed;
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import de.anomic.http.metadata.RequestHeader;
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import de.anomic.kelondro.text.referencePrototype.WordReferenceRow;
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import de.anomic.kelondro.util.FileUtils;
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import de.anomic.search.Switchboard;
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import de.anomic.search.SwitchboardConstants;
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import de.anomic.server.serverCore;
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import de.anomic.server.serverObjects;
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import de.anomic.server.serverSwitch;
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import de.anomic.yacy.yacyCore;
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import de.anomic.yacy.yacyNetwork;
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import de.anomic.yacy.yacySeed;
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import de.anomic.yacy.dht.FlatWordPartitionScheme;
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import de.anomic.yacy.logging.Log;
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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) throws InterruptedException {
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// return variable that accumulates replacements
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final Switchboard sb = (Switchboard) env;
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final serverObjects prop = new serverObjects();
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final String contentType = header.getContentType();
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if ((post == null) || (env == null)) {
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logWarning(contentType, "post or env is null!");
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return prop;
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}
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if (!yacyNetwork.authentifyRequest(post, env)) {
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logWarning(contentType, "not authentified");
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return prop;
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}
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if (!post.containsKey("wordc")) {
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logWarning(contentType, "missing wordc");
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return prop;
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}
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if (!post.containsKey("entryc")) {
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logWarning(contentType, "missing entryc");
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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.getConfig("allowReceiveIndex", "false").equals("true");
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final boolean blockBlacklist = sb.getConfig("indexReceiveBlockBlacklist", "false").equals("true");
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final long cachelimit = sb.getConfigLong(SwitchboardConstants.WORDCACHE_MAX_COUNT, 100000);
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final yacySeed 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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String result = "ok";
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final StringBuilder unknownURLs = new StringBuilder();
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if ((youare == null) || (!youare.equals(sb.peers.mySeed().hash))) {
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sb.getLog().logInfo("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().logInfo("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().logInfo("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().logInfo("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.indexSegment.termIndex().getBufferSize() > cachelimit) {
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// we are too busy to receive indexes
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sb.getLog().logInfo("Rejecting RWIs from peer " + otherPeerName + ". We are too busy (buffersize=" + sb.indexSegment.termIndex().getBufferSize() + ").");
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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().logInfo("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().logFine("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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final List<String> v = FileUtils.strings(indexes, null);
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// free memory
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indexes = null;
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// the value-vector should now have the same length as entryc
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if (v.size() != entryc) sb.getLog().logSevere("ERROR WITH ENTRY COUNTER: v=" + v.size() + ", entryc=" + entryc);
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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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String urlHash;
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WordReferenceRow iEntry;
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final HashSet<String> unknownURL = new HashSet<String>();
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final HashSet<String> knownURL = new HashSet<String>();
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final String[] wordhashes = new String[v.size()];
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int received = 0;
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int blocked = 0;
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int receivedURL = 0;
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final Iterator<String> i = v.iterator();
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while (i.hasNext()) {
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serverCore.checkInterruption();
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estring = i.next();
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// check if RWI entry is well-formed
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p = estring.indexOf("{");
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if ((p < 0) || (estring.indexOf("x=") < 0) || !(estring.indexOf("[B@") < 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[received] = wordHash;
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iEntry = new WordReferenceRow(estring.substring(p));
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urlHash = iEntry.metadataHash();
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// block blacklisted entries
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if ((blockBlacklist) && (Switchboard.urlBlacklist.hashInBlacklistedCache(Blacklist.BLACKLIST_DHT, urlHash))) {
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if (yacyCore.log.isFine()) yacyCore.log.logFine("transferRWI: blocked blacklisted URLHash '" + 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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yacyCore.log.logWarning("transferRWI: blocked URL hash '" + 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.indexSegment.termIndex().add(wordHash.getBytes(), iEntry);
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} catch (IOException e) {
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e.printStackTrace();
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}
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serverCore.checkInterruption();
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// check if we need to ask for the corresponding URL
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if (!(knownURL.contains(urlHash)||unknownURL.contains(urlHash))) try {
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if (sb.indexSegment.urlMetadata().exists(urlHash)) {
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knownURL.add(urlHash);
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} else {
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unknownURL.add(urlHash);
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}
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receivedURL++;
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} catch (final Exception ex) {
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sb.getLog().logWarning(
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"transferRWI: DB-Error while trying to determine if URL with hash '" +
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urlHash + "' is known.", ex);
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}
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received++;
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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<String> it = unknownURL.iterator();
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unknownURLs.ensureCapacity(unknownURL.size() * 25);
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while (it.hasNext()) {
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unknownURLs.append(",").append(it.next());
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}
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if (unknownURLs.length() > 0) { unknownURLs.delete(0, 1); }
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if ((wordhashes.length == 0) || (received == 0)) {
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sb.getLog().logInfo("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 long avdist = (FlatWordPartitionScheme.std.dhtDistance(wordhashes[0].getBytes(), null, sb.peers.mySeed()) + FlatWordPartitionScheme.std.dhtDistance(wordhashes[received - 1].getBytes(), null, sb.peers.mySeed())) / 2;
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sb.getLog().logInfo("Received " + received + " Entries " + wordc + " Words [" + wordhashes[0] + " .. " + wordhashes[received - 1] + "]/" + avdist + " from " + otherPeerName + ", processed in " + (System.currentTimeMillis() - startProcess) + " milliseconds, requesting " + unknownURL.size() + "/" + receivedURL + " URLs, blocked " + blocked + " RWIs");
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RSSFeed.channels(RSSFeed.INDEXRECEIVE).addMessage(new RSSMessage("Received " + received + " RWIs [" + wordhashes[0] + " .. " + wordhashes[received - 1] + "]/" + avdist + " from " + otherPeerName + ", requesting " + unknownURL.size() + " URLs, blocked " + blocked, "", ""));
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}
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result = "ok";
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pause = (int) (sb.indexSegment.termIndex().getBufferSize() * 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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Log.logWarning("transferRWI", requestIdentifier +" "+ msg);
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}
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}
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