// transferRWI.java // ----------------------- // part of the AnomicHTTPD caching proxy // (C) by Michael Peter Christen; mc@anomic.de // first published on http://www.anomic.de // Frankfurt, Germany, 2004, 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. // You must compile this file with // javac -classpath .:../classes transferRWI.java import java.util.HashSet; import java.util.Iterator; import java.util.List; import de.anomic.http.httpHeader; import de.anomic.index.indexRWIRowEntry; import de.anomic.index.indexReferenceBlacklist; import de.anomic.plasma.plasmaSwitchboard; import de.anomic.server.serverCore; import de.anomic.server.serverObjects; import de.anomic.server.serverSwitch; import de.anomic.tools.nxTools; import de.anomic.xml.RSSFeed; import de.anomic.xml.RSSMessage; import de.anomic.yacy.yacyCore; import de.anomic.yacy.yacyDHTAction; import de.anomic.yacy.yacyNetwork; import de.anomic.yacy.yacySeed; public final class transferRWI { public static serverObjects respond(httpHeader header, serverObjects post, serverSwitch env) throws InterruptedException { // return variable that accumulates replacements final plasmaSwitchboard sb = (plasmaSwitchboard) env; final serverObjects prop = new serverObjects(); if ((post == null) || (env == null)) return prop; if (!yacyNetwork.authentifyRequest(post, env)) return prop; if (!post.containsKey("wordc")) return prop; if (!post.containsKey("entryc")) 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 = (String) post.get("key", ""); // transmission key final int wordc = post.getInt("wordc", 0); // number of different words final int entryc = post.getInt("entryc", 0); // number of entries in indexes byte[] indexes = post.get("indexes", "").getBytes(); // the indexes, as list of word entries boolean granted = sb.getConfig("allowReceiveIndex", "false").equals("true"); boolean blockBlacklist = sb.getConfig("indexReceiveBlockBlacklist", "false").equals("true"); boolean checkLimit = sb.getConfigBool("indexDistribution.transferRWIReceiptLimitEnabled", true); final long cachelimit = sb.getConfigLong("indexDistribution.dhtReceiptLimit", 10000); final yacySeed otherPeer = sb.webIndex.seedDB.get(iam); final String otherPeerName = iam + ":" + ((otherPeer == null) ? "NULL" : (otherPeer.getName() + "/" + otherPeer.getVersion())); // response values String result = "ok"; StringBuffer unknownURLs = new StringBuffer(); int pause = 10000; if ((youare == null) || (!youare.equals(sb.webIndex.seedDB.mySeed().hash))) { sb.getLog().logInfo("Rejecting RWIs from peer " + otherPeerName + ". Wrong target. Wanted peer=" + youare + ", iam=" + sb.webIndex.seedDB.mySeed().hash); result = "wrong_target"; pause = 0; } else if ((!granted) || (sb.isRobinsonMode())) { // we dont want to receive indexes sb.getLog().logInfo("Rejecting RWIs from peer " + otherPeerName + ". Not granted."); result = "not_granted"; pause = 0; } else if (checkLimit && sb.webIndex.dhtInCacheSize() > cachelimit) { // we are too busy to receive indexes sb.getLog().logInfo("Rejecting RWIs from peer " + otherPeerName + ". We are too busy (buffersize=" + sb.webIndex.dhtInCacheSize() + ")."); granted = false; // don't accept more words if there are too many words to flush result = "busy"; pause = 60000; } /* else if ((checkLimit && sb.wordIndex.dhtOutCacheSize() > sb.getConfigLong(plasmaSwitchboard.WORDCACHE_MAX_COUNT, 20000)) || ((sb.wordIndex.busyCacheFlush) && (!shortCacheFlush))) { // we are too busy flushing the ramCache to receive indexes sb.getLog().logInfo("Rejecting RWIs from peer " + otherPeerName + ". We are too busy (wordcachesize=" + sb.wordIndex.dhtOutCacheSize() + ")."); granted = false; // don't accept more words if there are too many words to flush result = "busy"; pause = 300000; } */ else { // we want and can receive indexes // log value status (currently added to find outOfMemory error sb.getLog().logFine("Processing " + indexes.length + " bytes / " + wordc + " words / " + entryc + " entries from " + otherPeerName); final long startProcess = System.currentTimeMillis(); // decode request final List v = nxTools.strings(indexes, null); // free memory indexes = null; // the value-vector should now have the same length as entryc if (v.size() != entryc) sb.getLog().logSevere("ERROR WITH ENTRY COUNTER: v=" + v.size() + ", entryc=" + entryc); // now parse the Strings in the value-vector and write index entries String estring; int p; String wordHash; String urlHash; indexRWIRowEntry iEntry; final HashSet unknownURL = new HashSet(); final HashSet knownURL = new HashSet(); String[] wordhashes = new String[v.size()]; int received = 0; int blocked = 0; int receivedURL = 0; Iterator i = v.iterator(); while (i.hasNext()) { serverCore.checkInterruption(); estring = i.next(); // check if RWI entry is well-formed p = estring.indexOf("{"); if ((p < 0) || (estring.indexOf("x=") < 0)) { blocked++; continue; } wordHash = estring.substring(0, p); wordhashes[received] = wordHash; iEntry = new indexRWIRowEntry(estring.substring(p)); urlHash = iEntry.urlHash(); // block blacklisted entries if ((blockBlacklist) && (plasmaSwitchboard.urlBlacklist.hashInBlacklistedCache(indexReferenceBlacklist.BLACKLIST_DHT, urlHash))) { yacyCore.log.logFine("transferRWI: blocked blacklisted URLHash '" + urlHash + "' from peer " + otherPeerName); blocked++; continue; } // learn entry sb.webIndex.addEntry(wordHash, iEntry, System.currentTimeMillis(), true); serverCore.checkInterruption(); // check if we need to ask for the corresponding URL if (!(knownURL.contains(urlHash)||unknownURL.contains(urlHash))) try { if (sb.webIndex.existsURL(urlHash)) { knownURL.add(urlHash); } else { unknownURL.add(urlHash); } receivedURL++; } catch (Exception ex) { sb.getLog().logWarning( "transferRWI: DB-Error while trying to determine if URL with hash '" + urlHash + "' is known.", ex); } received++; } sb.webIndex.seedDB.mySeed().incRI(received); // finally compose the unknownURL hash list final Iterator it = unknownURL.iterator(); unknownURLs.ensureCapacity(unknownURL.size()*13); while (it.hasNext()) { unknownURLs.append(",").append(it.next()); } if (unknownURLs.length() > 0) { unknownURLs.delete(0, 1); } if ((wordhashes.length == 0) || (received == 0)) { sb.getLog().logInfo("Received 0 RWIs from " + otherPeerName + ", processed in " + (System.currentTimeMillis() - startProcess) + " milliseconds, requesting " + unknownURL.size() + " URLs, blocked " + blocked + " RWIs"); } else { final double avdist = (yacyDHTAction.dhtDistance(sb.webIndex.seedDB.mySeed().hash, wordhashes[0]) + yacyDHTAction.dhtDistance(sb.webIndex.seedDB.mySeed().hash, wordhashes[received - 1])) / 2.0; 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"); RSSFeed.channels(RSSFeed.INDEXRECEIVE).addMessage(new RSSMessage("Received " + received + " RWIs [" + wordhashes[0] + " .. " + wordhashes[received - 1] + "]/" + avdist + " from " + otherPeerName + ", requesting " + unknownURL.size() + " URLs, blocked " + blocked, "", "")); } result = "ok"; if (checkLimit) { pause = (sb.webIndex.dhtInCacheSize() < 500) ? 0 : sb.webIndex.dhtInCacheSize(); // estimation of necessary pause time } } prop.put("unknownURL", unknownURLs.toString()); prop.put("result", result); prop.put("pause", pause); // return rewrite properties return prop; } }