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262 lines
12 KiB
262 lines
12 KiB
/**
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* search
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* Copyright 2012 by Michael Peter Christen, mc@yacy.net, Frankfurt am Main, Germany
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* First released 30.10.2013 at http://yacy.net
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.yacy.http.servlets;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.io.OutputStreamWriter;
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import java.io.Writer;
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import java.util.Date;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import net.yacy.cora.date.ISO8601Formatter;
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import net.yacy.cora.document.encoding.UTF8;
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import net.yacy.cora.federate.solr.Ranking;
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import net.yacy.cora.federate.solr.connector.EmbeddedSolrConnector;
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import net.yacy.cora.federate.solr.responsewriter.GSAResponseWriter;
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import net.yacy.cora.protocol.HeaderFramework;
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import net.yacy.cora.util.ConcurrentLog;
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import net.yacy.data.UserDB;
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import net.yacy.search.Switchboard;
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import net.yacy.search.query.AccessTracker;
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import net.yacy.search.query.QueryGoal;
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import net.yacy.search.query.QueryModifier;
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import net.yacy.search.query.SearchEvent;
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import net.yacy.search.schema.CollectionSchema;
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import net.yacy.server.serverObjects;
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import org.apache.solr.common.SolrDocumentList;
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import org.apache.solr.common.SolrException;
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import org.apache.solr.common.params.CommonParams;
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import org.apache.solr.common.params.DisMaxParams;
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import org.apache.solr.request.SolrQueryRequest;
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import org.apache.solr.request.SolrRequestInfo;
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import org.apache.solr.response.QueryResponseWriter;
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import org.apache.solr.response.ResultContext;
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import org.apache.solr.response.SolrQueryResponse;
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import org.apache.solr.util.FastWriter;
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/**
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* This is a gsa result formatter for solr search results.
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* The result format is implemented according to
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* https://developers.google.com/search-appliance/documentation/614/xml_reference
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*/
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public class GSAsearchServlet extends HttpServlet {
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private static final long serialVersionUID = 7835985518515673885L;
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private final static GSAResponseWriter responseWriter = new GSAResponseWriter();
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@Override
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protected void doPost(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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doGet(request, response);
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}
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@Override
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protected void doGet(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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response.setContentType(QueryResponseWriter.CONTENT_TYPE_XML_UTF8);
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response.setStatus(HttpServletResponse.SC_OK);
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respond(request, Switchboard.getSwitchboard(), response.getOutputStream());
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}
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// ------------------------------------------
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/**
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* from here copy of htroot/gsa/gsasearchresult.java
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* with modification to use HttpServletRequest instead of (yacy) RequestHeader
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*/
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public static void respond(final HttpServletRequest header, final Switchboard sb, final OutputStream out) {
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// remember the peer contact for peer statistics
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String clientip = header.getHeader(HeaderFramework.CONNECTION_PROP_CLIENTIP);
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if (clientip == null) clientip = "<unknown>"; // read an artificial header addendum
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String userAgent = header.getHeader(HeaderFramework.USER_AGENT);
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if (userAgent == null) userAgent = "<unknown>";
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sb.peers.peerActions.setUserAgent(clientip, userAgent);
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// --- handled by Servlet securityHandler
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// check if user is allowed to search (can be switched in /ConfigPortal.html)
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boolean authenticated = header.isUserInRole(UserDB.AccessRight.ADMIN_RIGHT.toString()); //sb.adminAuthenticated(header) >= 2;
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// final boolean searchAllowed = authenticated || sb.getConfigBool(SwitchboardConstants.PUBLIC_SEARCHPAGE, true);
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// if (!searchAllowed) return null;
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// create post
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serverObjects post = new serverObjects();
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post.put(CommonParams.Q, ""); post.put("num", "0");
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// convert servletrequest parameter to old style serverObjects map
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Map<String, String[]> map = header.getParameterMap();
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Iterator<Map.Entry<String, String[]>> it = map.entrySet().iterator();
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while (it.hasNext()) {
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Map.Entry<String, String[]> param = it.next();
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post.put(param.getKey(), param.getValue()); // hint: post.put uses String[] for String value anyways
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}
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ConcurrentLog.info("GSA Query", post.toString());
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sb.intermissionAllThreads(3000); // tell all threads to do nothing for a specific time
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// rename post fields according to result style
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//post.put(CommonParams.Q, post.remove("q")); // same as solr
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//post.put(CommonParams.START, post.remove("start")); // same as solr
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//post.put(, post.remove("client"));//required, example: myfrontend
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//post.put(, post.remove("output"));//required, example: xml,xml_no_dtd
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String originalQuery = post.get(CommonParams.Q, "");
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post.put("originalQuery", originalQuery);
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// get a solr query string
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QueryGoal qg = new QueryGoal(originalQuery);
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List<String> solrFQ = qg.collectionTextFilterQuery(false);
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StringBuilder solrQ = qg.collectionTextQuery();
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post.put("defType", "edismax");
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for (String fq: solrFQ) post.add(CommonParams.FQ, fq);
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post.put(CommonParams.Q, solrQ.toString());
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post.put(CommonParams.ROWS, post.remove("num"));
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post.put(CommonParams.ROWS, Math.min(post.getInt(CommonParams.ROWS, 10), (authenticated) ? 100000000 : 100));
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// set ranking
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final Ranking ranking = sb.index.fulltext().getDefaultConfiguration().getRanking(0);
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final String qf = ranking.getQueryFields();
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if (!qf.isEmpty()) post.put(DisMaxParams.QF, qf);
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if (post.containsKey(CommonParams.SORT)) {
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// if a gsa-style sort attribute is given, use this to set the solr sort attribute
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GSAResponseWriter.Sort sort = new GSAResponseWriter.Sort(post.get(CommonParams.SORT, ""));
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String sorts = sort.toSolr();
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if (sorts == null) {
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post.remove(CommonParams.SORT);
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} else {
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post.put(CommonParams.SORT, sorts);
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}
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} else {
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// if no such sort attribute is given, use the ranking as configured for YaCy
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String fq = ranking.getFilterQuery();
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String bq = ranking.getBoostQuery();
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String bf = ranking.getBoostFunction();
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if (fq.length() > 0) post.put(CommonParams.FQ, fq);
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if (bq.length() > 0) post.put(DisMaxParams.BQ, bq);
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if (bf.length() > 0) post.put("boost", bf); // a boost function extension, see http://wiki.apache.org/solr/ExtendedDisMax#bf_.28Boost_Function.2C_additive.29
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}
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String daterange[] = post.remove("daterange");
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if (daterange != null) {
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String origfq = post.get(CommonParams.FQ);
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String datefq = "";
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for (String dr: daterange) {
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String from_to[] = dr.endsWith("..") ? new String[]{dr.substring(0, dr.length() - 2), ""} : dr.startsWith("..") ? new String[]{"", dr.substring(2)} : dr.split("\\.\\.");
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if (from_to.length != 2) continue;
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Date from = HeaderFramework.parseGSAFS(from_to[0]);
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if (from == null) from = new Date(0);
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Date to = HeaderFramework.parseGSAFS(from_to[1]);
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if (to == null) to = new Date();
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to.setTime(to.getTime() + 24L * 60L * 60L * 1000L); // we add a day because the day is inclusive
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String z = CollectionSchema.last_modified.getSolrFieldName() + ":[" + ISO8601Formatter.FORMATTER.format(from) + " TO " + ISO8601Formatter.FORMATTER.format(to) + "]";
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datefq = datefq.length() == 0 ? z : " OR " + z;
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}
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if (datefq.length() > 0) post.put(CommonParams.FQ, origfq == null || origfq.length() == 0 ? datefq : "(" + origfq + ") AND (" + datefq + ")");
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}
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post.put(CommonParams.FL,
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CollectionSchema.content_type.getSolrFieldName() + ',' +
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CollectionSchema.id.getSolrFieldName() + ',' +
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CollectionSchema.sku.getSolrFieldName() + ',' +
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CollectionSchema.title.getSolrFieldName() + ',' +
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CollectionSchema.description_txt.getSolrFieldName() + ',' +
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CollectionSchema.load_date_dt.getSolrFieldName() + ',' +
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CollectionSchema.last_modified.getSolrFieldName() + ',' +
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CollectionSchema.size_i.getSolrFieldName());
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post.put("hl", "true");
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post.put("hl.q", originalQuery);
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post.put("hl.fl", CollectionSchema.description_txt + "," + CollectionSchema.h4_txt.getSolrFieldName() + "," + CollectionSchema.h3_txt.getSolrFieldName() + "," + CollectionSchema.h2_txt.getSolrFieldName() + "," + CollectionSchema.h1_txt.getSolrFieldName() + "," + CollectionSchema.text_t.getSolrFieldName());
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post.put("hl.alternateField", CollectionSchema.description_txt.getSolrFieldName());
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post.put("hl.simple.pre", "<b>");
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post.put("hl.simple.post", "</b>");
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post.put("hl.fragsize", Integer.toString(SearchEvent.SNIPPET_MAX_LENGTH));
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//String[] access = post.remove("access");
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//String[] entqr = post.remove("entqr");
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// add sites operator
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String[] site = post.remove("site"); // example: col1|col2
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if (site != null && site[0].length() > 0) {
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String origfq = post.get(CommonParams.FQ);
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String sitefq = QueryModifier.parseCollectionExpression(site[0]);
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post.put(CommonParams.FQ, origfq == null || origfq.length() == 0 ? sitefq : "(" + origfq + ") AND (" + sitefq + ")");
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}
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// get the embedded connector
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EmbeddedSolrConnector connector = sb.index.fulltext().getDefaultEmbeddedConnector();
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if (connector == null) return;
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// do the solr request
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SolrQueryRequest req = connector.request(post.toSolrParams(null));
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SolrQueryResponse response = null;
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Exception e = null;
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try {response = connector.query(req);} catch (final SolrException ee) {e = ee;}
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if (response != null) e = response.getException();
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if (e != null) {
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ConcurrentLog.logException(e);
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if (req != null) req.close();
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SolrRequestInfo.clearRequestInfo();
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return;
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}
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// set some context for the writer
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/*
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Map<Object,Object> context = req.getContext();
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context.put("ip", header.get("CLIENTIP", ""));
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context.put("client", "vsm_frontent");
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context.put("sort", sort.sort);
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context.put("site", site == null ? "" : site);
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context.put("access", access == null ? "p" : access[0]);
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context.put("entqr", entqr == null ? "3" : entqr[0]);
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*/
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// write the result directly to the output stream
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Writer ow = new FastWriter(new OutputStreamWriter(out, UTF8.charset));
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try {
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responseWriter.write(ow, req, response);
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ow.flush();
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} catch (final IOException e1) {
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} finally {
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req.close();
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SolrRequestInfo.clearRequestInfo();
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try {ow.close();} catch (final IOException e1) {}
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}
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// log result
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Object rv = response.getValues().get("response");
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int matches = 0;
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if (rv != null && rv instanceof ResultContext) {
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matches = ((ResultContext) rv).docs.matches();
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} else if (rv != null && rv instanceof SolrDocumentList) {
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matches = (int) ((SolrDocumentList) rv).getNumFound();
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}
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AccessTracker.addToDump(originalQuery, Integer.toString(matches));
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ConcurrentLog.info("GSA Query", "results: " + matches + ", for query:" + post.toString());
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}
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}
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