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.
241 lines
12 KiB
241 lines
12 KiB
/**
|
|
* select
|
|
* Copyright 2012 by Michael Peter Christen, mc@yacy.net, Frankfurt am Main, Germany
|
|
* First released 12.08.2012 at http://yacy.net
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this program in the file lgpl21.txt
|
|
* If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
import java.io.IOException;
|
|
import java.io.OutputStream;
|
|
import java.io.OutputStreamWriter;
|
|
import java.io.Writer;
|
|
import java.util.HashMap;
|
|
import java.util.Map;
|
|
|
|
import javax.servlet.ServletException;
|
|
|
|
import net.yacy.cora.document.UTF8;
|
|
import net.yacy.cora.federate.solr.Ranking;
|
|
import net.yacy.cora.federate.solr.SolrServlet;
|
|
import net.yacy.cora.federate.solr.connector.EmbeddedSolrConnector;
|
|
import net.yacy.cora.federate.solr.responsewriter.EnhancedXMLResponseWriter;
|
|
import net.yacy.cora.federate.solr.responsewriter.GSAResponseWriter;
|
|
import net.yacy.cora.federate.solr.responsewriter.JsonResponseWriter;
|
|
import net.yacy.cora.federate.solr.responsewriter.OpensearchResponseWriter;
|
|
import net.yacy.cora.protocol.HeaderFramework;
|
|
import net.yacy.cora.protocol.RequestHeader;
|
|
import net.yacy.kelondro.logging.Log;
|
|
import net.yacy.search.Switchboard;
|
|
import net.yacy.search.SwitchboardConstants;
|
|
import net.yacy.search.query.AccessTracker;
|
|
import net.yacy.search.query.QueryGoal;
|
|
import net.yacy.search.query.QueryModifier;
|
|
import net.yacy.search.query.SearchEvent;
|
|
import net.yacy.search.schema.CollectionSchema;
|
|
import net.yacy.search.schema.WebgraphSchema;
|
|
import net.yacy.server.serverObjects;
|
|
import net.yacy.server.serverSwitch;
|
|
|
|
import org.apache.solr.common.SolrException;
|
|
import org.apache.solr.common.params.CommonParams;
|
|
import org.apache.solr.common.params.SolrParams;
|
|
import org.apache.solr.common.util.NamedList;
|
|
import org.apache.solr.core.SolrCore;
|
|
import org.apache.solr.request.SolrQueryRequest;
|
|
import org.apache.solr.response.QueryResponseWriter;
|
|
import org.apache.solr.response.ResultContext;
|
|
import org.apache.solr.response.SolrQueryResponse;
|
|
import org.apache.solr.response.XSLTResponseWriter;
|
|
import org.apache.solr.util.FastWriter;
|
|
|
|
|
|
// try
|
|
// http://localhost:8090/solr/select?q=*:*&start=0&rows=10&indent=on
|
|
|
|
/**
|
|
* this is a standard solr search result formatter as defined in
|
|
* http://wiki.apache.org/solr/SolrQuerySyntax
|
|
*/
|
|
public class select {
|
|
|
|
private static SolrServlet solrServlet = new SolrServlet();
|
|
private final static Map<String, QueryResponseWriter> RESPONSE_WRITER = new HashMap<String, QueryResponseWriter>();
|
|
static {
|
|
try {solrServlet.init(null);} catch (ServletException e) {}
|
|
RESPONSE_WRITER.putAll(SolrCore.DEFAULT_RESPONSE_WRITERS);
|
|
XSLTResponseWriter xsltWriter = new XSLTResponseWriter();
|
|
OpensearchResponseWriter opensearchResponseWriter = new OpensearchResponseWriter();
|
|
@SuppressWarnings("rawtypes")
|
|
NamedList initArgs = new NamedList();
|
|
xsltWriter.init(initArgs);
|
|
RESPONSE_WRITER.put("xslt", xsltWriter); // try i.e. http://localhost:8090/solr/select?q=*:*&start=0&rows=10&wt=xslt&tr=json.xsl
|
|
RESPONSE_WRITER.put("exml", new EnhancedXMLResponseWriter());
|
|
RESPONSE_WRITER.put("rss", opensearchResponseWriter); //try http://localhost:8090/solr/select?wt=rss&q=olympia&hl=true&hl.fl=text_t,h1,h2
|
|
RESPONSE_WRITER.put("opensearch", opensearchResponseWriter); //try http://localhost:8090/solr/select?wt=rss&q=olympia&hl=true&hl.fl=text_t,h1,h2
|
|
RESPONSE_WRITER.put("yjson", new JsonResponseWriter()); //try http://localhost:8090/solr/select?wt=json&q=olympia&hl=true&hl.fl=text_t,h1,h2
|
|
RESPONSE_WRITER.put("gsa", new GSAResponseWriter());
|
|
}
|
|
|
|
/**
|
|
* get the right mime type for this streamed result page
|
|
* @param header
|
|
* @param post
|
|
* @param env
|
|
* @return
|
|
*/
|
|
public static String mime(final RequestHeader header, final serverObjects post, final serverSwitch env) {
|
|
String wt = post.get(CommonParams.WT, "xml");
|
|
if (wt == null || wt.length() == 0 || "xml".equals(wt) || "exml".equals(wt)) return "text/xml";
|
|
if ("xslt".equals(wt)) {
|
|
String tr = post.get("tr","");
|
|
if (tr.indexOf("json") >= 0) return "application/json";
|
|
}
|
|
if ("rss".equals(wt)) return "application/rss+xml";
|
|
if ("exml".equals(wt)) return "application/rss+xml";
|
|
if ("json".equals(wt)) return "application/json";
|
|
if ("yjson".equals(wt)) return "application/json";
|
|
if ("python".equals(wt)) return "text/html";
|
|
if ("php".equals(wt) || "phps".equals(wt)) return "application/x-httpd-php";
|
|
if ("ruby".equals(wt)) return "text/html";
|
|
if ("raw".equals(wt)) return "application/octet-stream";
|
|
if ("javabin".equals(wt)) return "application/octet-stream";
|
|
if ("csv".equals(wt)) return "text/csv";
|
|
return "text/xml";
|
|
}
|
|
|
|
/**
|
|
* a query to solr, for documentation of parameters see:
|
|
* http://lucene.apache.org/solr/api-3_6_0/doc-files/tutorial.html
|
|
* and
|
|
* http://wiki.apache.org/solr/SolrQuerySyntax
|
|
* @param header
|
|
* @param post
|
|
* @param env
|
|
* @param out
|
|
* @return
|
|
*/
|
|
public static serverObjects respond(final RequestHeader header, final serverObjects post, final serverSwitch env, final OutputStream out) {
|
|
|
|
// this uses the methods in the jetty servlet environment and can be removed if jetty in implemented
|
|
Switchboard sb = (Switchboard) env;
|
|
|
|
// remember the peer contact for peer statistics
|
|
final String clientip = header.get(HeaderFramework.CONNECTION_PROP_CLIENTIP, "<unknown>"); // read an artificial header addendum
|
|
final String userAgent = header.get(HeaderFramework.USER_AGENT, "<unknown>");
|
|
sb.peers.peerActions.setUserAgent(clientip, userAgent);
|
|
|
|
// check if user is allowed to search (can be switched in /ConfigPortal.html)
|
|
boolean authenticated = sb.adminAuthenticated(header) >= 2;
|
|
final boolean searchAllowed = authenticated || sb.getConfigBool("publicSearchpage", true);
|
|
if (!searchAllowed) return null;
|
|
|
|
// check post
|
|
if (post == null) return null;
|
|
sb.intermissionAllThreads(3000); // tell all threads to do nothing for a specific time
|
|
|
|
// get the ranking profile id
|
|
int profileNr = post.getInt("profileNr", 0);
|
|
|
|
// rename post fields according to result style
|
|
if (!post.containsKey(CommonParams.Q) && post.containsKey("query")) {
|
|
String querystring = post.get("query", "");
|
|
post.remove("query");
|
|
QueryModifier modifier = new QueryModifier();
|
|
querystring = modifier.parse(querystring);
|
|
modifier.apply(post);
|
|
QueryGoal qg = new QueryGoal(querystring, querystring);
|
|
StringBuilder solrQ = qg.collectionQueryString(sb.index.fulltext().getDefaultConfiguration(), profileNr);
|
|
post.put(CommonParams.Q, solrQ.toString()); // sru patch
|
|
}
|
|
String q = post.get(CommonParams.Q, "");
|
|
if (!post.containsKey(CommonParams.START)) post.put(CommonParams.START, post.remove("startRecord", 0)); // sru patch
|
|
if (!post.containsKey(CommonParams.ROWS)) post.put(CommonParams.ROWS, post.remove("maximumRecords", 10)); // sru patch
|
|
post.put(CommonParams.ROWS, Math.min(post.getInt(CommonParams.ROWS, 10), (authenticated) ? 100000000 : 100));
|
|
|
|
// set ranking according to profile number if ranking attributes are not given in the request
|
|
if (!post.containsKey("sort") && !post.containsKey("bq") && !post.containsKey("bf") && !post.containsKey("boost")) {
|
|
if (!post.containsKey("defType")) post.put("defType", "edismax");
|
|
Ranking ranking = sb.index.fulltext().getDefaultConfiguration().getRanking(profileNr);
|
|
String bq = ranking.getBoostQuery();
|
|
String bf = ranking.getBoostFunction();
|
|
if (bq.length() > 0) post.put("bq", bq);
|
|
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
|
|
}
|
|
|
|
// get a response writer for the result
|
|
String wt = post.get(CommonParams.WT, "xml"); // maybe use /solr/select?q=*:*&start=0&rows=10&wt=exml
|
|
QueryResponseWriter responseWriter = RESPONSE_WRITER.get(wt);
|
|
if (responseWriter == null) return null;
|
|
if (responseWriter instanceof OpensearchResponseWriter) {
|
|
// set the title every time, it is possible that it has changed
|
|
final String promoteSearchPageGreeting =
|
|
(env.getConfigBool(SwitchboardConstants.GREETING_NETWORK_NAME, false)) ? env.getConfig(
|
|
"network.unit.description",
|
|
"") : env.getConfig(SwitchboardConstants.GREETING, "");
|
|
((OpensearchResponseWriter) responseWriter).setTitle(promoteSearchPageGreeting);
|
|
}
|
|
|
|
// if this is a call to YaCys special search formats, enhance the query with field assignments
|
|
if ((responseWriter instanceof JsonResponseWriter || responseWriter instanceof OpensearchResponseWriter) && "true".equals(post.get("hl", "true"))) {
|
|
// add options for snippet generation
|
|
if (!post.containsKey("hl.q")) post.put("hl.q", q);
|
|
if (!post.containsKey("hl.fl")) post.put("hl.fl", CollectionSchema.h1_txt.getSolrFieldName() + "," + CollectionSchema.h2_txt.getSolrFieldName() + "," + CollectionSchema.text_t.getSolrFieldName());
|
|
if (!post.containsKey("hl.alternateField")) post.put("hl.alternateField", CollectionSchema.description.getSolrFieldName());
|
|
if (!post.containsKey("hl.simple.pre")) post.put("hl.simple.pre", "<b>");
|
|
if (!post.containsKey("hl.simple.post")) post.put("hl.simple.post", "</b>");
|
|
if (!post.containsKey("hl.fragsize")) post.put("hl.fragsize", Integer.toString(SearchEvent.SNIPPET_MAX_LENGTH));
|
|
}
|
|
|
|
// get the embedded connector
|
|
boolean defaultConnector = post == null || post.get("core", CollectionSchema.CORE_NAME).equals(CollectionSchema.CORE_NAME);
|
|
EmbeddedSolrConnector connector = defaultConnector ? sb.index.fulltext().getDefaultEmbeddedConnector() : sb.index.fulltext().getEmbeddedConnector(WebgraphSchema.CORE_NAME);
|
|
if (connector == null) return null;
|
|
|
|
// do the solr request, generate facets if we use a special YaCy format
|
|
SolrParams params = post.toSolrParams(/*responseWriter instanceof JsonResponseWriter ? new YaCySchema[]{YaCySchema.host_s, YaCySchema.url_file_ext_s, YaCySchema.url_protocol_s} :*/ null);
|
|
SolrQueryRequest req = connector.request(params);
|
|
SolrQueryResponse response = null;
|
|
Exception e = null;
|
|
try {response = connector.query(req);} catch (SolrException ee) {e = ee;}
|
|
if (response != null) e = response.getException();
|
|
if (e != null) {
|
|
Log.logException(e);
|
|
return null;
|
|
}
|
|
|
|
// write the result directly to the output stream
|
|
Writer ow = new FastWriter(new OutputStreamWriter(out, UTF8.charset));
|
|
try {
|
|
responseWriter.write(ow, req, response);
|
|
ow.flush();
|
|
} catch (IOException e1) {
|
|
} finally {
|
|
req.close();
|
|
try {ow.close();} catch (IOException e1) {}
|
|
}
|
|
|
|
// log result
|
|
Object rv = response.getValues().get("response");
|
|
int matches = ((ResultContext) rv).docs.matches();
|
|
if (rv != null && rv instanceof ResultContext) {
|
|
AccessTracker.addToDump(q, Integer.toString(matches));
|
|
}
|
|
|
|
Log.logInfo("SOLR Query", "results: " + matches + ", for query:" + post.toString());
|
|
return null;
|
|
}
|
|
}
|