yacy_search_server/htroot/yacy/ui/result.java

// ysearchitem.java
// (C) 2004-2008 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany
// first published 2004 on http://yacy.net
//
// This is a part of YaCy, a peer-to-peer based web search engine
//
// $LastChangedDate: 2006-04-02 22:40:07 +0200 (So, 02 Apr 2006) $
// $LastChangedRevision: 1986 $
// $LastChangedBy: orbiter $
//
// 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

import java.util.TreeSet;

import de.anomic.http.httpHeader;
import de.anomic.index.indexWord;
import de.anomic.kelondro.kelondroBitfield;
import de.anomic.kelondro.kelondroMSetTools;
import de.anomic.plasma.plasmaCondenser;
import de.anomic.plasma.plasmaSearchEvent;
import de.anomic.plasma.plasmaSearchQuery;
import de.anomic.plasma.plasmaSearchRankingProfile;
import de.anomic.plasma.plasmaSwitchboard;
import de.anomic.server.serverCore;
import de.anomic.server.serverObjects;
import de.anomic.server.serverSwitch;
import de.anomic.server.logging.serverLog;
import de.anomic.tools.yFormatter;
import de.anomic.yacy.yacyCore;
import de.anomic.yacy.yacyURL;

public class result {

    public static serverObjects respond(httpHeader header, serverObjects post, serverSwitch<?> env) {
        final plasmaSwitchboard sb = (plasmaSwitchboard) env;
        sb.localSearchLastAccess = System.currentTimeMillis();
        
        boolean searchAllowed = sb.getConfigBool("publicSearchpage", true) || sb.verifyAuthentication(header, false);
        boolean authenticated = sb.adminAuthenticated(header) >= 2;
        int display = (post == null) ? 0 : post.getInt("display", 0);
        if ((display == 1) && (!authenticated)) display = 0;
        int input = (post == null) ? 2 : post.getInt("input", 2);
        String promoteSearchPageGreeting = env.getConfig("promoteSearchPageGreeting", "");
        if (env.getConfigBool("promoteSearchPageGreeting.useNetworkName", false)) promoteSearchPageGreeting = env.getConfig("network.unit.description", "");
        if (promoteSearchPageGreeting.length() == 0) promoteSearchPageGreeting = "P2P WEB SEARCH";

        // get query
        String querystring = (post == null) ? "" : post.get("search", "").trim();
        final serverObjects prop = new serverObjects();
        
        boolean rss = (post == null) ? false : post.get("rss", "false").equals("true");
        if ((post == null) || (env == null) || (querystring.length() == 0) || (!searchAllowed)) {
            // we create empty entries for template strings
            prop.put("searchagain", "0");
            prop.put("input", input);
            prop.put("display", display);
            prop.put("input_input", input);
            prop.put("input_display", display);
            prop.put("promoteSearchPageGreeting", promoteSearchPageGreeting);
            prop.put("input_former", "");
            prop.put("former", "");
            prop.put("input_count", "10");
            prop.put("input_offset", "0");
            prop.put("input_resource", "global");
            prop.put("input_urlmaskfilter", ".*");
            prop.put("input_prefermaskfilter", "");
            prop.put("input_indexof", "off");
            prop.put("input_constraint", "");
            prop.put("input_cat", "href");
            prop.put("input_depth", "0");
            prop.put("input_contentdom", "text");
            prop.put("input_contentdomCheckText", "1");
            prop.put("input_contentdomCheckAudio", "0");
            prop.put("input_contentdomCheckVideo", "0");
            prop.put("input_contentdomCheckImage", "0");
            prop.put("input_contentdomCheckApp", "0");
            prop.put("excluded", "0");
            prop.put("results", "");
            prop.put("resultTable", "0");
            prop.put("num-results", searchAllowed ? "0" : "4");
            
            return prop;
        }

        // collect search attributes
        int maxDistance = Integer.MAX_VALUE;
        
        if ((querystring.length() > 2) && (querystring.charAt(0) == '"') && (querystring.charAt(querystring.length() - 1) == '"')) {
            querystring = querystring.substring(1, querystring.length() - 1).trim();
            maxDistance = 1;
        }
        if (sb.facilityDB != null) try { sb.facilityDB.update("zeitgeist", querystring, post); } catch (Exception e) {}

        int itemsPerPage = post.getInt("count", 10);
        int offset = post.getInt("offset", 0);
        boolean global = (post == null) ? true : post.get("resource", "global").equals("global");
        final boolean indexof = post.get("indexof","").equals("on"); 
        String urlmask = "";
        if (post.containsKey("urlmask") && post.get("urlmask").equals("no")) {
            urlmask = ".*";
        } else {
            urlmask = (post.containsKey("urlmaskfilter")) ? (String) post.get("urlmaskfilter") : ".*";
        }
        String prefermask = post.get("prefermaskfilter", "");
        if ((prefermask.length() > 0) && (prefermask.indexOf(".*") < 0)) prefermask = ".*" + prefermask + ".*";

        kelondroBitfield constraint = ((post.containsKey("constraint")) && (post.get("constraint", "").length() > 0)) ? new kelondroBitfield(4, post.get("constraint", "______")) : null;
        if (indexof) {
            constraint = new kelondroBitfield(4);
            constraint.set(plasmaCondenser.flag_cat_indexof, true);
        }
        
        int domainzone = post.getInt("zone", yacyURL.TLD_any_zone_filter);
        
        // SEARCH
        //final boolean indexDistributeGranted = sb.getConfig(plasmaSwitchboard.INDEX_DIST_ALLOW, "true").equals("true");
        //final boolean indexReceiveGranted = sb.getConfig("allowReceiveIndex", "true").equals("true");
        //final boolean offline = yacyCore.seedDB.mySeed().isVirgin();
        final boolean clustersearch = sb.isRobinsonMode() &&
    									(sb.getConfig("cluster.mode", "").equals("privatecluster") ||
    									 sb.getConfig("cluster.mode", "").equals("publiccluster"));
        //if (offline || !indexDistributeGranted || !indexReceiveGranted) { global = false; }
        if (clustersearch) global = true; // switches search on, but search target is limited to cluster nodes
        
        // find search domain
        int contentdomCode = plasmaSearchQuery.contentdomParser(post.get("contentdom", "text"));
        
        // patch until better search profiles are available
        if ((contentdomCode != plasmaSearchQuery.CONTENTDOM_TEXT) && (itemsPerPage <= 32)) itemsPerPage = 32;
        
        if (post.get("cat", "href").equals("href")) {

            final TreeSet<String>[] query = plasmaSearchQuery.cleanQuery(querystring); // converts also umlaute
            boolean near = (query[0].contains("near")) && (querystring.indexOf("NEAR") >= 0);
            if (near) {
            	query[0].remove("near");
            }
            plasmaSearchRankingProfile ranking = sb.getRanking();
            if (near) {
            	ranking.coeff_worddistance = plasmaSearchRankingProfile.COEFF_MAX;
            }
            	
            // filter out stopwords
            final TreeSet<String> filtered = kelondroMSetTools.joinConstructive(query[0], plasmaSwitchboard.stopwords);
            if (filtered.size() > 0) {
                kelondroMSetTools.excludeDestructive(query[0], plasmaSwitchboard.stopwords);
            }

            // prepare search properties
            final boolean yacyonline = ((yacyCore.seedDB != null) && (yacyCore.seedDB.mySeed() != null) && (yacyCore.seedDB.mySeed().getPublicAddress() != null));
            final boolean globalsearch = (global) && (yacyonline) && (sb.getConfigBool(plasmaSwitchboard.INDEX_RECEIVE_ALLOW, false));
        
            // do the search
            String client = (String) header.get(httpHeader.CONNECTION_PROP_CLIENTIP); // the search client who initiated the search
            TreeSet<String> queryHashes = indexWord.words2hashes(query[0]);
            plasmaSearchQuery theQuery = new plasmaSearchQuery(
        			querystring,
        			queryHashes,
        			indexWord.words2hashes(query[1]),
        			ranking,
                    maxDistance,
                    prefermask,
                    contentdomCode,
                    true,
                    itemsPerPage,
                    offset,
                    urlmask,
                    (clustersearch && globalsearch) ? plasmaSearchQuery.SEARCHDOM_CLUSTERALL :
                    ((globalsearch) ? plasmaSearchQuery.SEARCHDOM_GLOBALDHT : plasmaSearchQuery.SEARCHDOM_LOCAL),
                    "",
                    20,
                    constraint,
                    true,
                    domainzone,
                    client);

            
            // tell all threads to do nothing for a specific time
            sb.intermissionAllThreads(3000);
        
            // filter out words that appear in bluelist
            theQuery.filterOut(plasmaSwitchboard.blueList);
            
            // log
            serverLog.logInfo("LOCAL_SEARCH", "INIT WORD SEARCH: " + theQuery.queryString + ":" + theQuery.queryHashes + " - " + theQuery.neededResults() + " links to be computed, " + theQuery.displayResults() + " lines to be displayed");
            long timestamp = System.currentTimeMillis();

            // create a new search event
            if (plasmaSearchEvent.getEvent(theQuery.id(false)) == null) {
                theQuery.setOffset(0); // in case that this is a new search, always start without a offset 
                offset = 0;
            }
            plasmaSearchEvent theSearch = plasmaSearchEvent.getEvent(theQuery, ranking, sb.wordIndex, sb.crawlResults, (sb.isRobinsonMode()) ? sb.clusterhashes : null, false);
            
            // generate result object
            serverLog.logFine("LOCAL_SEARCH", "SEARCH TIME AFTER ORDERING OF SEARCH RESULTS: " + ((System.currentTimeMillis() - timestamp) / 1000) + " seconds");
            serverLog.logFine("LOCAL_SEARCH", "SEARCH TIME AFTER RESULT PREPARATION: " + ((System.currentTimeMillis() - timestamp) / 1000) + " seconds");
                
            // calc some more cross-reference
            serverLog.logFine("LOCAL_SEARCH", "SEARCH TIME AFTER XREF PREPARATION: " + ((System.currentTimeMillis() - timestamp) / 1000) + " seconds");

            // log
            serverLog.logInfo("LOCAL_SEARCH", "EXIT WORD SEARCH: " + theQuery.queryString + " - " +
                    (theSearch.getRankingResult().getLocalResourceSize() + theSearch.getRankingResult().getRemoteResourceSize()) + " links found, " +
                    ((System.currentTimeMillis() - timestamp) / 1000) + " seconds");

            // prepare search statistics
            theQuery.resultcount = theSearch.getRankingResult().getLocalResourceSize() + theSearch.getRankingResult().getRemoteResourceSize();
            theQuery.searchtime = System.currentTimeMillis() - timestamp;
            theQuery.urlretrievaltime = theSearch.getURLRetrievalTime();
            theQuery.snippetcomputationtime = theSearch.getSnippetComputationTime();
            sb.localSearches.add(theQuery);
            TreeSet<Long> handles = sb.localSearchTracker.get(client);
            if (handles == null) handles = new TreeSet<Long>();
            handles.add(theQuery.handle);
            sb.localSearchTracker.put(client, handles);
            
            int totalcount = theSearch.getRankingResult().getLocalResourceSize() + theSearch.getRankingResult().getRemoteResourceSize();
            prop.put("num-results_offset", offset);
            prop.put("num-results_itemscount", "0");
            prop.put("num-results_itemsPerPage", itemsPerPage);
            prop.put("num-results_totalcount", yFormatter.number(totalcount, !rss));
            prop.put("num-results_globalresults", (globalsearch) ? "1" : "0");
            prop.put("num-results_globalresults_localResourceSize", yFormatter.number(theSearch.getRankingResult().getLocalResourceSize(), !rss));
            prop.put("num-results_globalresults_remoteResourceSize", yFormatter.number(theSearch.getRankingResult().getRemoteResourceSize(), !rss));
            prop.put("num-results_globalresults_remoteIndexCount", yFormatter.number(theSearch.getRankingResult().getRemoteIndexCount(), !rss));
            prop.put("num-results_globalresults_remotePeerCount", yFormatter.number(theSearch.getRankingResult().getRemotePeerCount(), !rss));
        
            // generate the search result lines; they will be produced by another servlet
            for (int i = 0; i < theQuery.displayResults(); i++) {
                prop.put("results_" + i + "_item", offset + i);
                prop.put("results_" + i + "_eventID", theQuery.id(false));
                prop.put("results_" + i + "_ID", theQuery.id(false).substring(1,6));
            }
            prop.put("results", theQuery.displayResults());
            prop.put("resultTable", (contentdomCode <= 1) ? "0" : "1");
            prop.put("eventID", theQuery.id(false)); // for bottomline
            prop.put("ID", theQuery.id(false).substring(1,6)); // for bottomline            
            
            // process result of search
            if (filtered.size() > 0) {
                prop.put("excluded", "1");
                prop.putHTML("excluded_stopwords", filtered.toString());
            } else {
                prop.put("excluded", "0");
            }

            if (prop == null || prop.size() == 0) {
                if (post.get("search", "").length() < 3) {
                    prop.put("num-results", "2"); // no results - at least 3 chars
                } else {
                    prop.put("num-results", "1"); // no results
                }
            } else {
                prop.put("num-results", "3");
            }

            prop.put("input_cat", "href");
            prop.put("input_depth", "0");

            // adding some additional properties needed for the rss feed
            String hostName = (String) header.get("Host", "localhost");
            if (hostName.indexOf(":") == -1) hostName += ":" + serverCore.getPortNr(env.getConfig("port", "8080"));
            prop.put("searchBaseURL", "http://" + hostName + "/yacysearch.html");
            prop.put("rssYacyImageURL", "http://" + hostName + "/env/grafics/yacy.gif");
        }
        
        prop.put("searchagain", global ? "1" : "0");
        prop.put("input", input);
        prop.put("display", display);
        prop.put("input_input", input);
        prop.put("input_display", display);
        prop.put("promoteSearchPageGreeting", promoteSearchPageGreeting);
        prop.putHTML("input_former", querystring);
        //prop.put("former", post.get("search", ""));
        prop.put("input_count", itemsPerPage);
        prop.put("input_offset", offset);
        prop.put("input_resource", global ? "global" : "local");
        prop.putHTML("input_urlmaskfilter", urlmask);
        prop.putHTML("input_prefermaskfilter", prefermask);
        prop.put("input_indexof", (indexof) ? "on" : "off");
        prop.put("input_constraint", (constraint == null) ? "" : constraint.exportB64());
        prop.put("input_contentdom", post.get("contentdom", "text"));
        prop.put("input_contentdomCheckText", (contentdomCode == plasmaSearchQuery.CONTENTDOM_TEXT) ? "1" : "0");
        prop.put("input_contentdomCheckAudio", (contentdomCode == plasmaSearchQuery.CONTENTDOM_AUDIO) ? "1" : "0");
        prop.put("input_contentdomCheckVideo", (contentdomCode == plasmaSearchQuery.CONTENTDOM_VIDEO) ? "1" : "0");
        prop.put("input_contentdomCheckImage", (contentdomCode == plasmaSearchQuery.CONTENTDOM_IMAGE) ? "1" : "0");
        prop.put("input_contentdomCheckApp", (contentdomCode == plasmaSearchQuery.CONTENTDOM_APP) ? "1" : "0");
        
        // for RSS: don't HTML encode some elements
        prop.putHTML("rss_query", querystring, true);
        prop.put("rss_queryenc", yacyURL.escape(querystring.replace(' ', '+')));

        sb.localSearchLastAccess = System.currentTimeMillis();
        
        // return rewrite properties
        return prop;
    }
/*
    private static String navhidden(int page, int display, plasmaSearchQuery theQuery) {
        return
        "<input type=\"hidden\" name=\"display\" value=\"" + display + "\" />" +
        "<input type=\"hidden\" name=\"search\" value=\"" + theQuery.queryString() + "\" />" +
        "<input type=\"hidden\" name=\"count\" value=\"" + theQuery.displayResults() + "\" />" +
        "<input type=\"hidden\" name=\"offset\" value=\"" + (page * theQuery.displayResults()) + "\" />" +
        "<input type=\"hidden\" name=\"resource\" value=\"" + theQuery.searchdom() + "\" />" +
        "<input type=\"hidden\" name=\"urlmaskfilter\" value=\"" + theQuery.urlMask + "\" />" +
        "<input type=\"hidden\" name=\"prefermaskfilter\" value=\"" + theQuery.prefer + "\" />" +
        "<input type=\"hidden\" name=\"cat\" value=\"href\" />" +
        "<input type=\"hidden\" name=\"constraint\" value=\"" + ((theQuery.constraint == null) ? "" : theQuery.constraint.exportB64()) + "\" />" +
        "<input type=\"hidden\" name=\"contentdom\" value=\"" + theQuery.contentdom() + "\" />" +
        "<input type=\"hidden\" name=\"former\" value=\"" + theQuery.queryString() + "\" />";
    }
    */
}