You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
294 lines
17 KiB
294 lines
17 KiB
// search.java
|
|
// (C) 2004 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
|
|
// first published on http://yacy.net
|
|
//
|
|
// This is a part of YaCy, a peer-to-peer based web search engine
|
|
//
|
|
// $LastChangedDate$
|
|
// $LastChangedRevision$
|
|
// $LastChangedBy$
|
|
//
|
|
// LICENSE
|
|
//
|
|
// 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
|
|
|
|
// You must compile this file with
|
|
// javac -classpath .:../../Classes search.java
|
|
// if the shell's current path is htroot/yacy
|
|
|
|
import java.util.ArrayList;
|
|
import java.util.HashMap;
|
|
import java.util.Iterator;
|
|
import java.util.Map;
|
|
import java.util.TreeSet;
|
|
|
|
import de.anomic.http.httpHeader;
|
|
import de.anomic.kelondro.kelondroBase64Order;
|
|
import de.anomic.kelondro.kelondroBitfield;
|
|
import de.anomic.index.indexContainer;
|
|
import de.anomic.net.natLib;
|
|
import de.anomic.plasma.plasmaSearchEvent;
|
|
import de.anomic.plasma.plasmaURL;
|
|
import de.anomic.plasma.plasmaSearchQuery;
|
|
import de.anomic.plasma.plasmaSearchRankingProfile;
|
|
import de.anomic.plasma.plasmaSearchProcessing;
|
|
import de.anomic.plasma.plasmaSwitchboard;
|
|
import de.anomic.server.serverCore;
|
|
import de.anomic.server.serverObjects;
|
|
import de.anomic.server.serverSwitch;
|
|
import de.anomic.yacy.yacyCore;
|
|
import de.anomic.yacy.yacyNetwork;
|
|
import de.anomic.yacy.yacySeed;
|
|
import de.anomic.tools.crypt;
|
|
|
|
public final class search {
|
|
|
|
public static serverObjects respond(httpHeader header, serverObjects post, serverSwitch env) {
|
|
// return variable that accumulates replacements
|
|
final plasmaSwitchboard sb = (plasmaSwitchboard) env;
|
|
serverObjects prop = new serverObjects();
|
|
if ((post == null) || (env == null)) return prop;
|
|
if (!yacyNetwork.authentifyRequest(post, env)) return prop;
|
|
|
|
//System.out.println("yacy: search received request = " + post.toString());
|
|
|
|
final String oseed = post.get("myseed", ""); // complete seed of the requesting peer
|
|
// final String youare = post.get("youare", ""); // seed hash of the target peer, used for testing network stability
|
|
final String key = post.get("key", ""); // transmission key for response
|
|
final String query = post.get("query", ""); // a string of word hashes that shall be searched and combined
|
|
final String exclude= post.get("exclude", "");// a string of word hashes that shall not be within the search result
|
|
String urls = post.get("urls", ""); // a string of url hashes that are preselected for the search: no other may be returned
|
|
String abstracts = post.get("abstracts", ""); // a string of word hashes for abstracts that shall be generated, or 'auto' (for maxcount-word), or '' (for none)
|
|
// final String fwdep = post.get("fwdep", ""); // forward depth. if "0" then peer may NOT ask another peer for more results
|
|
// final String fwden = post.get("fwden", ""); // forward deny, a list of seed hashes. They may NOT be target of forward hopping
|
|
final long duetime= Math.min(60000, post.getLong("duetime", 3000));
|
|
final int count = Math.min(100, post.getInt("count", 10)); // maximum number of wanted results
|
|
final int maxdist= post.getInt("maxdist", Integer.MAX_VALUE);
|
|
final String prefer = post.get("prefer", "");
|
|
final String contentdom = post.get("contentdom", "text");
|
|
final String filter = post.get("filter", ".*");
|
|
final int partitions = post.getInt("partitions", 30);
|
|
String profile = post.get("profile", ""); // remote profile hand-over
|
|
if (profile.length() > 0) profile = crypt.simpleDecode(profile, null);
|
|
//final boolean includesnippet = post.get("includesnippet", "false").equals("true");
|
|
final kelondroBitfield constraint = new kelondroBitfield(4, post.get("constraint", "______"));
|
|
// final boolean global = ((String) post.get("resource", "global")).equals("global"); // if true, then result may consist of answers from other peers
|
|
// Date remoteTime = yacyCore.parseUniversalDate((String) post.get(yacySeed.MYTIME)); // read remote time
|
|
|
|
// test:
|
|
// http://localhost:8080/yacy/search.html?query=4galTpdpDM5Q (search for linux)
|
|
// http://localhost:8080/yacy/search.html?query=gh8DKIhGKXws (search for book)
|
|
// http://localhost:8080/yacy/search.html?query=4galTpdpDM5Qgh8DKIhGKXws&abstracts=auto (search for linux and book, generate abstract automatically)
|
|
// http://localhost:8080/yacy/search.html?query=&abstracts=4galTpdpDM5Q (only abstracts for linux)
|
|
|
|
if ((sb.isRobinsonMode()) &&
|
|
(!((sb.isPublicRobinson()) ||
|
|
(sb.isInMyCluster((String)header.get(httpHeader.CONNECTION_PROP_CLIENTIP)))))) {
|
|
// if we are a robinson cluster, answer only if this client is known by our network definition
|
|
prop.putASIS("links", "");
|
|
prop.putASIS("linkcount", "0");
|
|
prop.putASIS("references", "");
|
|
return prop;
|
|
}
|
|
|
|
// tell all threads to do nothing for a specific time
|
|
sb.intermissionAllThreads(2 * duetime);
|
|
|
|
TreeSet abstractSet = ((abstracts.length() == 0) || (abstracts.equals("auto"))) ? null : plasmaSearchQuery.hashes2Set(abstracts);
|
|
|
|
// store accessing peer
|
|
if (yacyCore.seedDB == null) {
|
|
yacyCore.log.logSevere("yacy.search: seed cache not initialized");
|
|
} else {
|
|
yacyCore.peerActions.peerArrival(yacySeed.genRemoteSeed(oseed, key, true), true);
|
|
}
|
|
|
|
// prepare search
|
|
final TreeSet queryhashes = plasmaSearchQuery.hashes2Set(query);
|
|
final TreeSet excludehashes = (exclude.length() == 0) ? new TreeSet(kelondroBase64Order.enhancedCoder) : plasmaSearchQuery.hashes2Set(exclude);
|
|
final long timestamp = System.currentTimeMillis();
|
|
|
|
// prepare an abstract result
|
|
StringBuffer indexabstract = new StringBuffer();
|
|
int indexabstractContainercount = 0;
|
|
int joincount = 0;
|
|
plasmaSearchQuery theQuery = null;
|
|
ArrayList accu = null;
|
|
if ((query.length() == 0) && (abstractSet != null)) {
|
|
// this is _not_ a normal search, only a request for index abstracts
|
|
theQuery = new plasmaSearchQuery(abstractSet, new TreeSet(kelondroBase64Order.enhancedCoder), maxdist, prefer, plasmaSearchQuery.contentdomParser(contentdom), count, duetime, filter, plasmaSearchQuery.catchall_constraint);
|
|
theQuery.domType = plasmaSearchQuery.SEARCHDOM_LOCAL;
|
|
yacyCore.log.logInfo("INIT HASH SEARCH (abstracts only): " + plasmaSearchQuery.anonymizedQueryHashes(theQuery.queryHashes) + " - " + theQuery.wantedResults + " links");
|
|
|
|
// prepare a search profile
|
|
plasmaSearchProcessing localTiming = new plasmaSearchProcessing(theQuery.maximumTime, theQuery.wantedResults);
|
|
|
|
//theSearch = new plasmaSearchEvent(squery, rankingProfile, localTiming, remoteTiming, true, sb.wordIndex, null);
|
|
Map[] containers = localTiming.localSearchContainers(theQuery, sb.wordIndex, plasmaSearchQuery.hashes2Set(urls));
|
|
if (containers != null) {
|
|
Iterator ci = containers[0].entrySet().iterator();
|
|
Map.Entry entry;
|
|
String wordhash;
|
|
while (ci.hasNext()) {
|
|
entry = (Map.Entry) ci.next();
|
|
wordhash = (String) entry.getKey();
|
|
indexContainer container = (indexContainer) entry.getValue();
|
|
indexabstractContainercount += container.size();
|
|
indexabstract.append("indexabstract." + wordhash + "=").append(plasmaURL.compressIndex(container, null, 1000).toString()).append(serverCore.crlfString);
|
|
}
|
|
}
|
|
|
|
prop.putASIS("indexcount", "");
|
|
prop.put("joincount", 0);
|
|
prop.putASIS("references", "");
|
|
|
|
} else {
|
|
// retrieve index containers from search request
|
|
theQuery = new plasmaSearchQuery(queryhashes, excludehashes, maxdist, prefer, plasmaSearchQuery.contentdomParser(contentdom), count, duetime, filter, constraint);
|
|
theQuery.domType = plasmaSearchQuery.SEARCHDOM_LOCAL;
|
|
yacyCore.log.logInfo("INIT HASH SEARCH (query-" + abstracts + "): " + plasmaSearchQuery.anonymizedQueryHashes(theQuery.queryHashes) + " - " + theQuery.wantedResults + " links");
|
|
|
|
// prepare a search profile
|
|
plasmaSearchRankingProfile rankingProfile = (profile.length() == 0) ? new plasmaSearchRankingProfile(plasmaSearchQuery.contentdomParser(contentdom)) : new plasmaSearchRankingProfile("", profile);
|
|
plasmaSearchProcessing localProcess = new plasmaSearchProcessing(theQuery.maximumTime, theQuery.wantedResults);
|
|
//plasmaSearchProcessing remoteProcess = null;
|
|
|
|
plasmaSearchEvent theSearch = plasmaSearchEvent.getEvent(theQuery, rankingProfile, localProcess, null, sb.wordIndex, null, true, abstractSet);
|
|
//Map[] containers = localProcess.localSearchContainers(theQuery, sb.wordIndex, plasmaSearchQuery.hashes2Set(urls));
|
|
// set statistic details of search result and find best result index set
|
|
if (theSearch.getLocalCount() == 0) {
|
|
prop.putASIS("indexcount", "");
|
|
prop.putASIS("joincount", "0");
|
|
} else {
|
|
// attach information about index abstracts
|
|
StringBuffer indexcount = new StringBuffer();
|
|
Map.Entry entry;
|
|
Iterator i = theSearch.IACount.entrySet().iterator();
|
|
while (i.hasNext()) {
|
|
entry = (Map.Entry) i.next();
|
|
indexcount.append("indexcount.").append((String) entry.getKey()).append('=').append(((Integer) entry.getValue()).toString()).append(serverCore.crlfString);
|
|
}
|
|
if (abstractSet != null) {
|
|
// if a specific index-abstract is demanded, attach it here
|
|
i = abstractSet.iterator();
|
|
String wordhash;
|
|
while (i.hasNext()) {
|
|
wordhash = (String) i.next();
|
|
indexabstractContainercount += ((Integer) theSearch.IACount.get(wordhash)).intValue();
|
|
indexabstract.append("indexabstract." + wordhash + "=").append((String) theSearch.IAResults.get(wordhash)).append(serverCore.crlfString);
|
|
}
|
|
}
|
|
prop.putASIS("indexcount", new String(indexcount));
|
|
|
|
if (theSearch.getLocalCount() == 0) {
|
|
joincount = 0;
|
|
prop.put("joincount", 0);
|
|
} else {
|
|
joincount = theSearch.getLocalCount();
|
|
prop.putASIS("joincount", Integer.toString(joincount));
|
|
accu = theSearch.computeResults(plasmaSwitchboard.blueList, false);
|
|
}
|
|
|
|
// generate compressed index for maxcounthash
|
|
// this is not needed if the search is restricted to specific
|
|
// urls, because it is a re-search
|
|
if ((theSearch.IAmaxcounthash == null) || (urls.length() != 0) || (queryhashes.size() == 1) || (abstracts.length() == 0)) {
|
|
prop.putASIS("indexabstract", "");
|
|
} else if (abstracts.equals("auto")) {
|
|
// automatically attach the index abstract for the index that has the most references. This should be our target dht position
|
|
indexabstractContainercount += ((Integer) theSearch.IACount.get(theSearch.IAmaxcounthash)).intValue();
|
|
indexabstract.append("indexabstract." + theSearch.IAmaxcounthash + "=").append((String) theSearch.IAResults.get(theSearch.IAmaxcounthash)).append(serverCore.crlfString);
|
|
if ((theSearch.IAneardhthash != null) && (!(theSearch.IAneardhthash.equals(theSearch.IAmaxcounthash)))) {
|
|
// in case that the neardhthash is different from the maxcounthash attach also the neardhthash-container
|
|
indexabstractContainercount += ((Integer) theSearch.IACount.get(theSearch.IAneardhthash)).intValue();
|
|
indexabstract.append("indexabstract." + theSearch.IAneardhthash + "=").append((String) theSearch.IAResults.get(theSearch.IAneardhthash)).append(serverCore.crlfString);
|
|
}
|
|
//System.out.println("DEBUG-ABSTRACTGENERATION: maxcounthash = " + maxcounthash);
|
|
//System.out.println("DEBUG-ABSTRACTGENERATION: neardhthash = "+ neardhthash);
|
|
//yacyCore.log.logFine("DEBUG HASH SEARCH: " + indexabstract);
|
|
}
|
|
}
|
|
if (partitions > 0) sb.requestedQueries = sb.requestedQueries + 1d / (double) partitions; // increase query counter
|
|
|
|
// prepare reference hints
|
|
Object[] ws = theSearch.references();
|
|
StringBuffer refstr = new StringBuffer();
|
|
for (int j = 0; j < ws.length; j++)
|
|
refstr.append(",").append((String) ws[j]);
|
|
prop.putASIS("references", (refstr.length() > 0) ? refstr.substring(1) : new String(refstr));
|
|
}
|
|
prop.putASIS("indexabstract", new String(indexabstract));
|
|
|
|
// prepare search statistics
|
|
Long trackerHandle = new Long(System.currentTimeMillis());
|
|
String client = (String) header.get("CLIENTIP");
|
|
HashMap searchProfile = theQuery.resultProfile((accu == null) ? 0 : accu.size(), System.currentTimeMillis() - timestamp);
|
|
searchProfile.put("host", client);
|
|
yacySeed remotepeer = yacyCore.seedDB.lookupByIP(natLib.getInetAddress(client), true, false, false);
|
|
searchProfile.put("peername", (remotepeer == null) ? "unknown" : remotepeer.getName());
|
|
searchProfile.put("time", trackerHandle);
|
|
sb.remoteSearches.add(searchProfile);
|
|
|
|
TreeSet handles = (TreeSet) sb.remoteSearchTracker.get(client);
|
|
if (handles == null) handles = new TreeSet();
|
|
handles.add(trackerHandle);
|
|
sb.remoteSearchTracker.put(client, handles);
|
|
|
|
// prepare result
|
|
if ((joincount == 0) || (accu == null)) {
|
|
|
|
// no results
|
|
prop.putASIS("links", "");
|
|
prop.putASIS("linkcount", "0");
|
|
prop.putASIS("references", "");
|
|
|
|
} else {
|
|
// result is a List of urlEntry elements
|
|
StringBuffer links = new StringBuffer();
|
|
String resource = null;
|
|
plasmaSearchEvent.Entry entry;
|
|
for (int i = 0; i < accu.size(); i++) {
|
|
entry = (plasmaSearchEvent.Entry) accu.get(i);
|
|
resource = entry.resource();
|
|
if (resource != null) {
|
|
links.append("resource").append(i).append('=').append(resource).append(serverCore.crlfString);
|
|
}
|
|
}
|
|
prop.putASIS("links", new String(links));
|
|
prop.put("linkcount", accu.size());
|
|
}
|
|
|
|
// add information about forward peers
|
|
prop.putASIS("fwhop", ""); // hops (depth) of forwards that had been performed to construct this result
|
|
prop.putASIS("fwsrc", ""); // peers that helped to construct this result
|
|
prop.putASIS("fwrec", ""); // peers that would have helped to construct this result (recommendations)
|
|
|
|
// log
|
|
yacyCore.log.logInfo("EXIT HASH SEARCH: " +
|
|
plasmaSearchQuery.anonymizedQueryHashes(theQuery.queryHashes) + " - " + joincount + " links found, " +
|
|
prop.get("linkcount", "?") + " links selected, " +
|
|
indexabstractContainercount + " index abstract references attached, " +
|
|
(System.currentTimeMillis() - timestamp) + " milliseconds");
|
|
|
|
prop.putASIS("searchtime", Long.toString(System.currentTimeMillis() - timestamp));
|
|
|
|
final int links = Integer.parseInt(prop.get("linkcount","0"));
|
|
yacyCore.seedDB.mySeed.incSI(links);
|
|
yacyCore.seedDB.mySeed.incSU(links);
|
|
return prop;
|
|
}
|
|
|
|
}
|