// 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.LinkedList; import de.anomic.http.httpHeader; import de.anomic.plasma.plasmaSwitchboard; import de.anomic.plasma.plasmaWordIndexEntry; import de.anomic.plasma.plasmaWordIndexEntryContainer; import de.anomic.server.serverCore; import de.anomic.server.serverObjects; import de.anomic.server.serverSwitch; import de.anomic.yacy.yacyCore; import de.anomic.yacy.yacySeed; import de.anomic.yacy.yacyDHTAction; public final class transferRWI { public static serverObjects respond(httpHeader header, serverObjects post, serverSwitch ss) throws InterruptedException { if (post == null || ss == null) { return null; } // return variable that accumulates replacements final plasmaSwitchboard sb = (plasmaSwitchboard) ss; final serverObjects prop = new serverObjects(); if (prop == null || sb == null) { return null; } // request values final String iam = post.get("iam", ""); // seed hash of requester // final String youare = (String) 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 = Integer.parseInt(post.get("wordc", "")); // number of different words final int entryc = Integer.parseInt(post.get("entryc", "")); // number of entries in indexes byte[] indexes = post.get("indexes", "").getBytes(); // the indexes, as list of word entries final boolean granted = sb.getConfig("allowReceiveIndex", "false").equals("true"); // response values String result = ""; StringBuffer unknownURLs = new StringBuffer(); final yacySeed otherPeer = yacyCore.seedDB.get(iam); final String otherPeerName = iam + ":" + ((otherPeer == null) ? "NULL" : (otherPeer.getName() + "/" + otherPeer.getVersion())); if (granted) { // 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 LinkedList v = new LinkedList(); int s = 0; int e; while (s < indexes.length) { e = s; while (e < indexes.length) if (indexes[e++] < 32) {e--; break;} if ((e - s) > 0) v.add(new String(indexes, s, e - s)); s = e; while (s < indexes.length) if (indexes[s++] >= 32) {s--; break;} } // 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; plasmaWordIndexEntry entry; int wordhashesSize = v.size(); final HashSet unknownURL = new HashSet(); String[] wordhashes = new String[v.size()]; int received = 0; for (int i = 0; i < wordhashesSize; i++) { serverCore.checkInterruption(); estring = (String) v.removeFirst(); p = estring.indexOf("{"); if (p > 0) { wordHash = estring.substring(0, p); wordhashes[received] = wordHash; entry = new plasmaWordIndexEntry(estring.substring(p)); sb.wordIndex.addEntries(plasmaWordIndexEntryContainer.instantContainer(wordHash, System.currentTimeMillis(), entry), true); serverCore.checkInterruption(); urlHash = entry.getUrlHash(); try { if ( (!(unknownURL.contains(urlHash))) && (!(sb.urlPool.loadedURL.exists(urlHash))) ) { unknownURL.add(urlHash); } } catch (Exception ex) { sb.getLog().logWarning("transferRWI: DB-Error while trying to determine if URL with hash '" + urlHash + "' is known.",ex); unknownURL.add(urlHash); } received++; } } yacyCore.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((String) it.next()); } if (unknownURLs.length() > 0) { unknownURLs.delete(0, 1); } if (wordhashes.length == 0) { sb.getLog().logInfo("Received 0 RWIs from " + otherPeerName + ", processed in " + (System.currentTimeMillis() - startProcess) + " milliseconds, requesting " + unknownURL.size() + " URLs"); } else { final double avdist = (yacyDHTAction.dhtDistance(yacyCore.seedDB.mySeed.hash, wordhashes[0]) + yacyDHTAction.dhtDistance(yacyCore.seedDB.mySeed.hash, wordhashes[received - 1])) / 2.0; sb.getLog().logInfo("Received " + received + " Words [" + wordhashes[0] + " .. " + wordhashes[received - 1] + "]/" + avdist + " from " + otherPeerName + ", processed in " + (System.currentTimeMillis() - startProcess) + " milliseconds, requesting " + unknownURL.size() + " URLs"); } result = "ok"; } else { sb.getLog().logInfo("Rejecting RWIs from peer " + otherPeerName + ". Not granted."); result = "error_not_granted"; } prop.put("unknownURL", unknownURLs.toString()); prop.put("result", result); // return rewrite properties return prop; } }