// yacysearch.java // ----------------------- // part of the AnomicHTTPD caching proxy // (C) by Michael Peter Christen; mc@yacy.net // first published on http://www.anomic.de // Frankfurt, Germany, 2004 // // $LastChangedDate$ // $LastChangedRevision$ // $LastChangedBy$ // // 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 // // You must compile this file with // javac -classpath .:../classes yacysearch.java // if the shell's current path is HTROOT import java.util.HashMap; import java.util.TreeSet; import de.anomic.http.httpRequestHeader; import de.anomic.index.indexURLReference; import de.anomic.index.indexWord; import de.anomic.kelondro.kelondroBitfield; import de.anomic.kelondro.kelondroMSetTools; import de.anomic.kelondro.kelondroMemory; import de.anomic.plasma.plasmaCondenser; import de.anomic.plasma.plasmaParserDocument; import de.anomic.plasma.plasmaProfiling; import de.anomic.plasma.plasmaSearchEvent; import de.anomic.plasma.plasmaSearchQuery; import de.anomic.plasma.plasmaSearchRankingProfile; import de.anomic.plasma.plasmaSnippetCache; import de.anomic.plasma.plasmaSwitchboard; import de.anomic.plasma.plasmaSwitchboardConstants; import de.anomic.server.serverCore; import de.anomic.server.serverDomains; import de.anomic.server.serverObjects; import de.anomic.server.serverProfiling; import de.anomic.server.serverSwitch; import de.anomic.server.logging.serverLog; import de.anomic.tools.iso639; import de.anomic.tools.yFormatter; import de.anomic.xml.RSSFeed; import de.anomic.xml.RSSMessage; import de.anomic.yacy.yacyNewsPool; import de.anomic.yacy.yacyNewsRecord; import de.anomic.yacy.yacyURL; public class yacysearch { public static serverObjects respond(final httpRequestHeader header, final serverObjects post, final serverSwitch env) { final plasmaSwitchboard sb = (plasmaSwitchboard) env; sb.localSearchLastAccess = System.currentTimeMillis(); final boolean searchAllowed = sb.getConfigBool("publicSearchpage", true) || sb.verifyAuthentication(header, false); final boolean authenticated = sb.adminAuthenticated(header) >= 2; int display = (post == null) ? 0 : post.getInt("display", 0); if ((display == 1) && (!authenticated)) display = 0; final 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"; final String client = header.get(httpRequestHeader.CONNECTION_PROP_CLIENTIP); // the search client who initiated the search // get query String querystring = (post == null) ? "" : post.get("query", post.get("search", "")).trim(); // SRU compliance boolean fetchSnippets = (post != null && post.get("verify", "false").equals("true")); final serverObjects prop = new serverObjects(); //final boolean rss = (post == null) ? false : post.get("rss", "false").equals("true"); prop.put("input_promoteSearchPageGreeting", promoteSearchPageGreeting); prop.put("input_promoteSearchPageGreeting.homepage", sb.getConfig("promoteSearchPageGreeting.homepage", "")); prop.put("input_promoteSearchPageGreeting.smallImage", sb.getConfig("promoteSearchPageGreeting.smallImage", "")); 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("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_verify", "true"); 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 boolean newsearch = post.hasValue("query") && post.hasValue("former") && !post.get("query","").equalsIgnoreCase(post.get("former","")); //new search term int itemsPerPage = Math.min((authenticated) ? 1000 : 10, post.getInt("maximumRecords", post.getInt("count", 10))); // SRU syntax with old property as alternative int offset = (newsearch) ? 0 : post.getInt("startRecord", post.getInt("offset", 0)); boolean global = (post == null) ? true : post.get("resource", "global").equals("global"); final boolean indexof = (post != null && post.get("indexof","").equals("on")); String urlmask = null; String originalUrlMask = null; if (post.containsKey("urlmask") && post.get("urlmask").equals("no")) { // option search all originalUrlMask = ".*"; } else if (!newsearch && post.containsKey("urlmaskfilter")) { originalUrlMask = post.get("urlmaskfilter", ".*"); } else { originalUrlMask = ".*"; } String prefermask = (post == null ? "" : post.get("prefermaskfilter", "")); if ((prefermask.length() > 0) && (prefermask.indexOf(".*") < 0)) prefermask = ".*" + prefermask + ".*"; kelondroBitfield constraint = (post != null && 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); } // SEARCH final boolean indexReceiveGranted = sb.getConfigBool(plasmaSwitchboardConstants.INDEX_RECEIVE_ALLOW, true); global = global && indexReceiveGranted; // if the user does not want indexes from remote peers, it cannot be a global search //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 final int contentdomCode = plasmaSearchQuery.contentdomParser((post == null ? "text" : post.get("contentdom", "text"))); // patch until better search profiles are available if ((contentdomCode != plasmaSearchQuery.CONTENTDOM_TEXT) && (itemsPerPage <= 32)) itemsPerPage = 32; // check the search tracker TreeSet trackerHandles = sb.localSearchTracker.get(client); if (trackerHandles == null) trackerHandles = new TreeSet(); boolean block = false; if (serverDomains.matchesList(client, sb.networkBlacklist)) { global = false; fetchSnippets = false; block = true; serverLog.logWarning("LOCAL_SEARCH", "ACCECC CONTROL: BLACKLISTED CLIENT FROM " + client + " gets no permission to search"); } else if (serverDomains.matchesList(client, sb.networkWhitelist)) { serverLog.logInfo("LOCAL_SEARCH", "ACCECC CONTROL: WHITELISTED CLIENT FROM " + client + " gets no search restrictions"); } else if (global || fetchSnippets) { // in case that we do a global search or we want to fetch snippets, we check for DoS cases int accInOneSecond = trackerHandles.tailSet(Long.valueOf(System.currentTimeMillis() - 1000)).size(); int accInThreeSeconds = trackerHandles.tailSet(Long.valueOf(System.currentTimeMillis() - 3000)).size(); int accInOneMinute = trackerHandles.tailSet(Long.valueOf(System.currentTimeMillis() - 60000)).size(); int accInTenMinutes = trackerHandles.tailSet(Long.valueOf(System.currentTimeMillis() - 600000)).size(); if (accInTenMinutes > 600) { global = false; fetchSnippets = false; block = true; serverLog.logWarning("LOCAL_SEARCH", "ACCECC CONTROL: CLIENT FROM " + client + ": " + accInTenMinutes + " searches in ten minutes, fully blocked (no results generated)"); } else if (accInOneMinute > 200) { global = false; fetchSnippets = false; block = true; serverLog.logWarning("LOCAL_SEARCH", "ACCECC CONTROL: CLIENT FROM " + client + ": " + accInOneMinute + " searches in one minute, fully blocked (no results generated)"); } else if (accInThreeSeconds > 1) { global = false; fetchSnippets = false; serverLog.logWarning("LOCAL_SEARCH", "ACCECC CONTROL: CLIENT FROM " + client + ": " + accInThreeSeconds + " searches in three seconds, blocked global search and snippets"); } else if (accInOneSecond > 2) { global = false; fetchSnippets = false; serverLog.logWarning("LOCAL_SEARCH", "ACCECC CONTROL: CLIENT FROM " + client + ": " + accInOneSecond + " searches in one second, blocked global search and snippets"); } } if ((!block) && (post == null || post.get("cat", "href").equals("href"))) { // check available memory and clean up if necessary if (!kelondroMemory.request(8000000L, false)) { sb.webIndex.clearCache(); plasmaSearchEvent.cleanupEvents(true); } final plasmaSearchRankingProfile ranking = sb.getRanking(); final TreeSet[] query = plasmaSearchQuery.cleanQuery(querystring); // converts also umlaute if ((query[0].contains("near")) && (querystring.indexOf("NEAR") >= 0)) { query[0].remove("near"); ranking.coeff_worddistance = plasmaSearchRankingProfile.COEFF_MAX; } if ((query[0].contains("recent")) && (querystring.indexOf("RECENT") >= 0)) { query[0].remove("recent"); ranking.coeff_date = plasmaSearchRankingProfile.COEFF_MAX; } int lrp = querystring.indexOf("LANGUAGE:"); String lr = ""; if (lrp >= 0) { if (querystring.length() >= (lrp + 11)) lr = querystring.substring(lrp + 9, lrp + 11).toLowerCase(); query[0].remove("language:" + lr); } int inurl = querystring.indexOf("inurl:"); if (inurl >= 0) { int ftb = querystring.indexOf(' ', inurl); if (ftb == -1) ftb = querystring.length(); String urlstr = querystring.substring(inurl + 6, ftb); query[0].remove("inurl:" + urlstr.toLowerCase()); if(urlstr.length() > 0) urlmask = ".*" + urlstr + ".*"; } int filetype = querystring.indexOf("filetype:"); if (filetype >= 0) { int ftb = querystring.indexOf(' ', filetype); if (ftb == -1) ftb = querystring.length(); String ft = querystring.substring(filetype + 9, ftb); query[0].remove("filetype:" + ft.toLowerCase()); while(ft.startsWith(".")) ft = ft.substring(1); if(ft.length() > 0) { if (urlmask == null) { urlmask = ".*\\." + ft; } else { urlmask = urlmask + ".*\\." + ft; } } } int site = querystring.indexOf("site:"); if (site >= 0) { int ftb = querystring.indexOf(' ', site); if (ftb == -1) ftb = querystring.length(); String domain = querystring.substring(site + 5, ftb); query[0].remove("site:" + domain.toLowerCase()); while(domain.startsWith(".")) domain = domain.substring(1); if (domain.indexOf(".") < 0) domain = "\\." + domain; // is tld if (domain.length() > 0) { if (urlmask == null) { urlmask = "[a-zA-Z]*://[^/]*" + domain + "/.*"; } else { urlmask = "[a-zA-Z]*://[^/]*" + domain + "/.*" + urlmask; } } } if (urlmask == null || urlmask.length() == 0) urlmask = originalUrlMask; //if no urlmask was given // read the language from the language-restrict option 'lr' // if no one is given, use the user agent or the system language as default String language = (post == null) ? lr : post.get("lr", lr); if (language.startsWith("lang_")) language = language.substring(5); if (!iso639.exists(language)) { // find out language of the user by reading of the user-agent string String agent = header.get(httpRequestHeader.ACCEPT_LANGUAGE); if (agent == null) agent = System.getProperty("user.language"); language = (agent == null) ? "en" : iso639.userAgentLanguageDetection(agent); if (language == null) language = "en"; } int maxDistance = (querystring.indexOf('"') >= 0) ? maxDistance = query.length - 1 : Integer.MAX_VALUE; // filter out stopwords final TreeSet filtered = kelondroMSetTools.joinConstructive(query[0], plasmaSwitchboard.stopwords); if (filtered.size() > 0) { kelondroMSetTools.excludeDestructive(query[0], plasmaSwitchboard.stopwords); } // if a minus-button was hit, remove a special reference first if (post != null && post.containsKey("deleteref")) { if (!sb.verifyAuthentication(header, true)) { prop.put("AUTHENTICATE", "admin log-in"); // force log-in return prop; } // delete the index entry locally final String delHash = post.get("deleteref", ""); // urlhash sb.webIndex.removeWordReferences(query[0], delHash); // make new news message with negative voting final HashMap map = new HashMap(); map.put("urlhash", delHash); map.put("vote", "negative"); map.put("refid", ""); sb.webIndex.newsPool.publishMyNews(yacyNewsRecord.newRecord(sb.webIndex.seedDB.mySeed(), yacyNewsPool.CATEGORY_SURFTIPP_VOTE_ADD, map)); } // if a plus-button was hit, create new voting message if (post != null && post.containsKey("recommendref")) { if (!sb.verifyAuthentication(header, true)) { prop.put("AUTHENTICATE", "admin log-in"); // force log-in return prop; } final String recommendHash = post.get("recommendref", ""); // urlhash final indexURLReference urlentry = sb.webIndex.getURL(recommendHash, null, 0); if (urlentry != null) { final indexURLReference.Components comp = urlentry.comp(); plasmaParserDocument document; document = plasmaSnippetCache.retrieveDocument(comp.url(), true, 5000, true, false); if (document != null) { // create a news message final HashMap map = new HashMap(); map.put("url", comp.url().toNormalform(false, true).replace(',', '|')); map.put("title", comp.dc_title().replace(',', ' ')); map.put("description", document.dc_title().replace(',', ' ')); map.put("author", document.dc_creator()); map.put("tags", document.dc_subject(' ')); sb.webIndex.newsPool.publishMyNews(yacyNewsRecord.newRecord(sb.webIndex.seedDB.mySeed(), yacyNewsPool.CATEGORY_SURFTIPP_ADD, map)); document.close(); } } } // prepare search properties //final boolean yacyonline = ((sb.webIndex.seedDB != null) && (sb.webIndex.seedDB.mySeed() != null) && (sb.webIndex.seedDB.mySeed().getPublicAddress() != null)); final boolean globalsearch = (global) /* && (yacyonline)*/ && (sb.getConfigBool(plasmaSwitchboardConstants.INDEX_RECEIVE_ALLOW, false)); // do the search final TreeSet queryHashes = indexWord.words2hashes(query[0]); final plasmaSearchQuery theQuery = new plasmaSearchQuery( querystring, queryHashes, indexWord.words2hashes(query[1]), indexWord.words2hashes(query[2]), ranking, maxDistance, prefermask, contentdomCode, language, fetchSnippets, itemsPerPage, offset, urlmask, (clustersearch && globalsearch) ? plasmaSearchQuery.SEARCHDOM_CLUSTERALL : ((globalsearch) ? plasmaSearchQuery.SEARCHDOM_GLOBALDHT : plasmaSearchQuery.SEARCHDOM_LOCAL), "", 20, constraint, true, yacyURL.TLD_any_zone_filter, client, authenticated); serverProfiling.update("SEARCH", new plasmaProfiling.searchEvent(theQuery.id(true), plasmaSearchEvent.INITIALIZATION, 0, 0)); // tell all threads to do nothing for a specific time sb.intermissionAllThreads(10000); // 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"); RSSFeed.channels(RSSFeed.LOCALSEARCH).addMessage(new RSSMessage("Local Search Request", theQuery.queryString, "")); final 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; } final plasmaSearchEvent theSearch = plasmaSearchEvent.getEvent(theQuery, ranking, sb.webIndex, 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) + " ms"); //serverLog.logFine("LOCAL_SEARCH", "SEARCH TIME AFTER RESULT PREPARATION: " + (System.currentTimeMillis() - timestamp) + " ms"); // calc some more cross-reference //serverLog.logFine("LOCAL_SEARCH", "SEARCH TIME AFTER XREF PREPARATION: " + (System.currentTimeMillis() - timestamp) + " ms"); // log serverLog.logInfo("LOCAL_SEARCH", "EXIT WORD SEARCH: " + theQuery.queryString + " - " + (theSearch.getRankingResult().getLocalResourceSize() + theSearch.getRankingResult().getRemoteResourceSize()) + " links found, " + (System.currentTimeMillis() - timestamp) + " ms"); // 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); // update the search tracker trackerHandles.add(theQuery.handle); sb.localSearchTracker.put(client, trackerHandles); final 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, true)); prop.put("num-results_globalresults", (globalsearch) ? "1" : "0"); prop.put("num-results_globalresults_localResourceSize", yFormatter.number(theSearch.getRankingResult().getLocalResourceSize(), true)); prop.put("num-results_globalresults_remoteResourceSize", yFormatter.number(theSearch.getRankingResult().getRemoteResourceSize(), true)); prop.put("num-results_globalresults_remoteIndexCount", yFormatter.number(theSearch.getRankingResult().getRemoteIndexCount(), true)); prop.put("num-results_globalresults_remotePeerCount", yFormatter.number(theSearch.getRankingResult().getRemotePeerCount(), true)); // compose page navigation final StringBuilder resnav = new StringBuilder(); final int thispage = offset / theQuery.displayResults(); if (thispage == 0) resnav.append("< "); else { resnav.append(navurla(thispage - 1, display, theQuery, originalUrlMask)); resnav.append("< "); } final int numberofpages = Math.min(10, Math.max(thispage + 2, totalcount / theQuery.displayResults())); for (int i = 0; i < numberofpages; i++) { if (i == thispage) { resnav.append(""); resnav.append(i + 1); resnav.append(" "); } else { resnav.append(navurla(i, display, theQuery, originalUrlMask)); resnav.append(i + 1); resnav.append(" "); } } if (thispage >= numberofpages) resnav.append(">"); else { resnav.append(navurla(thispage + 1, display, theQuery, originalUrlMask)); resnav.append(">"); } prop.put("num-results_resnav", resnav.toString()); // 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 + "_display", display); } prop.put("results", theQuery.displayResults()); prop.put("resultTable", (contentdomCode <= 1) ? "0" : "1"); prop.put("eventID", theQuery.id(false)); // 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 == null || post.get("query", 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.putHTML("input_former", querystring); prop.put("input_count", itemsPerPage); prop.put("input_offset", offset); prop.put("input_resource", global ? "global" : "local"); prop.putHTML("input_urlmaskfilter", originalUrlMask); prop.putHTML("input_prefermaskfilter", prefermask); prop.put("input_indexof", (indexof) ? "on" : "off"); prop.put("input_constraint", (constraint == null) ? "" : constraint.exportB64()); prop.put("input_verify", (fetchSnippets) ? "true" : "false"); prop.put("input_contentdom", (post == null ? "text" : 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.putXML("rss_query", querystring); prop.put("rss_queryenc", yacyURL.escape(querystring.replace(' ', '+'))); sb.localSearchLastAccess = System.currentTimeMillis(); // return rewrite properties return prop; } /** * generates the page navigation bar */ private static String navurla(final int page, final int display, final plasmaSearchQuery theQuery, final String originalUrlMask) { return ""; } }