1 /* This file is part of Metaproxy.
2 Copyright (C) 2005-2011 Index Data
4 Metaproxy is free software; you can redistribute it and/or modify it under
5 the terms of the GNU General Public License as published by the Free
6 Software Foundation; either version 2, or (at your option) any later
9 Metaproxy is distributed in the hope that it will be useful, but WITHOUT ANY
10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "filter_virt_db.hpp"
22 #include <metaproxy/package.hpp>
24 #include <boost/thread/mutex.hpp>
25 #include <boost/thread/condition.hpp>
26 #include <boost/shared_ptr.hpp>
28 #include <metaproxy/util.hpp>
32 #include <yaz/otherinfo.h>
33 #include <yaz/diagbib1.h>
34 #include <yaz/match_glob.h>
35 #include <yaz/query-charset.h>
41 namespace mp = metaproxy_1;
42 namespace yf = mp::filter;
44 namespace metaproxy_1 {
47 struct VirtualDB::Set {
48 Set(BackendPtr b, std::string setname);
53 std::string m_setname;
55 struct VirtualDB::Map {
56 Map(std::string database, std::list<std::string> targets, std::string route);
57 Map(std::string database, std::string target, std::string route);
59 bool match(const std::string db) const;
60 std::string m_dbpattern;
61 std::list<std::string> m_targets;
64 std::string query_encoding;
66 struct VirtualDB::Backend {
67 mp::Session m_backend_session;
68 std::list<std::string> m_frontend_databases;
69 std::list<std::string> m_targets;
71 std::string query_encoding;
72 bool m_named_result_sets;
75 struct VirtualDB::Frontend {
78 mp::Session m_session;
81 yazpp_1::GDU m_init_gdu;
82 std::list<BackendPtr> m_backend_list;
83 std::map<std::string,VirtualDB::Set> m_sets;
85 void search(Package &package, Z_APDU *apdu);
86 void present(Package &package, Z_APDU *apdu);
87 void scan(Package &package, Z_APDU *apdu);
88 int relay_apdu(Package &package, Z_APDU *apdu);
90 void close(Package &package);
91 typedef std::map<std::string,VirtualDB::Set>::iterator Sets_it;
93 void fixup_package(Package &p, BackendPtr b);
94 void fixup_npr_record(ODR odr, Z_NamePlusRecord *npr,
96 void fixup_npr_records(ODR odr, Z_Records *records,
99 BackendPtr lookup_backend_from_databases(
100 std::list<std::string> databases);
101 BackendPtr create_backend_from_databases(
102 std::list<std::string> databases,
104 std::string &failing_database);
106 BackendPtr init_backend(std::list<std::string> database,
108 int &error_code, std::string &addinfo);
111 class VirtualDB::Rep {
112 friend class VirtualDB;
113 friend struct Frontend;
115 FrontendPtr get_frontend(Package &package);
116 void release_frontend(Package &package);
117 void refresh_torus();
119 std::list<VirtualDB::Map>m_maps;
120 typedef std::map<std::string,VirtualDB::Set>::iterator Sets_it;
121 boost::mutex m_mutex;
122 boost::condition m_cond_session_ready;
123 std::map<mp::Session, FrontendPtr> m_clients;
130 yf::VirtualDB::BackendPtr yf::VirtualDB::Frontend::lookup_backend_from_databases(
131 std::list<std::string> databases)
133 std::list<BackendPtr>::const_iterator map_it;
134 map_it = m_backend_list.begin();
135 for (; map_it != m_backend_list.end(); map_it++)
136 if ((*map_it)->m_frontend_databases == databases)
142 yf::VirtualDB::BackendPtr yf::VirtualDB::Frontend::create_backend_from_databases(
143 std::list<std::string> databases, int &error_code, std::string &addinfo)
145 BackendPtr b(new Backend);
146 std::list<std::string>::const_iterator db_it = databases.begin();
148 b->m_number_of_sets = 0;
149 b->m_frontend_databases = databases;
150 b->m_named_result_sets = false;
152 bool first_route = true;
154 std::map<std::string,bool> targets_dedup;
155 for (; db_it != databases.end(); db_it++)
157 std::list<VirtualDB::Map>::const_iterator map_it;
158 map_it = m_p->m_maps.begin();
159 while (map_it != m_p->m_maps.end())
161 if (map_it->match(*db_it))
166 if (map_it == m_p->m_maps.end()) // database not found
168 error_code = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
173 std::list<std::string>::const_iterator t_it =
174 map_it->m_targets.begin();
175 for (; t_it != map_it->m_targets.end(); t_it++) {
176 if (!targets_dedup[*t_it])
178 targets_dedup[*t_it] = true;
179 b->m_targets.push_back(*t_it);
183 // see if we have a route conflict.
184 if (!first_route && b->m_route != map_it->m_route)
186 // we have a conflict.. routing must be same for all
187 error_code = YAZ_BIB1_COMBI_OF_SPECIFIED_DATABASES_UNSUPP;
191 b->m_route = map_it->m_route;
192 if (!first_route && b->query_encoding != map_it->query_encoding)
194 // we have a conflict. query encoding must be same for all
195 error_code = YAZ_BIB1_COMBI_OF_SPECIFIED_DATABASES_UNSUPP;
199 b->query_encoding = map_it->query_encoding;
205 yf::VirtualDB::BackendPtr yf::VirtualDB::Frontend::init_backend(
206 std::list<std::string> databases, mp::Package &package,
207 int &error_code, std::string &addinfo)
209 BackendPtr b = create_backend_from_databases(databases, error_code,
213 Package init_package(b->m_backend_session, package.origin());
214 init_package.copy_filter(package);
218 Z_APDU *init_apdu = zget_APDU(odr, Z_APDU_initRequest);
220 mp::util::set_vhost_otherinfo(&init_apdu->u.initRequest->otherInfo, odr,
222 Z_InitRequest *req = init_apdu->u.initRequest;
224 // copy stuff from Frontend Init Request
225 Z_GDU *org_gdu = m_init_gdu.get();
226 Z_InitRequest *org_init = org_gdu->u.z3950->u.initRequest;
228 req->idAuthentication = org_init->idAuthentication;
229 req->implementationId = org_init->implementationId;
230 req->implementationName = org_init->implementationName;
231 req->implementationVersion = org_init->implementationVersion;
232 *req->preferredMessageSize = *org_init->preferredMessageSize;
233 *req->maximumRecordSize = *org_init->maximumRecordSize;
235 ODR_MASK_SET(req->options, Z_Options_search);
236 ODR_MASK_SET(req->options, Z_Options_present);
237 ODR_MASK_SET(req->options, Z_Options_namedResultSets);
238 ODR_MASK_SET(req->options, Z_Options_scan);
240 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_1);
241 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_2);
242 ODR_MASK_SET(req->protocolVersion, Z_ProtocolVersion_3);
244 init_package.request() = init_apdu;
246 init_package.move(b->m_route); // sending init
248 Z_GDU *gdu = init_package.response().get();
249 // we hope to get an init response
250 error_code = YAZ_BIB1_DATABASE_UNAVAILABLE;
251 if (gdu && gdu->which == Z_GDU_Z3950
252 && gdu->u.z3950->which == Z_APDU_initResponse
253 && *gdu->u.z3950->u.initResponse->result)
255 Z_InitResponse *res = gdu->u.z3950->u.initResponse;
256 if (ODR_MASK_GET(res->options, Z_Options_namedResultSets))
258 b->m_named_result_sets = true;
260 if (*res->result && !init_package.session().is_closed())
262 m_backend_list.push_back(b);
265 mp::util::get_init_diagnostics(res, error_code, addinfo);
267 if (!init_package.session().is_closed())
269 Package close_package(b->m_backend_session, package.origin());
270 close_package.copy_filter(package);
271 close_package.session().close();
272 close_package.move(b->m_route); // closing it
278 void yf::VirtualDB::Frontend::search(mp::Package &package, Z_APDU *apdu_req)
280 Z_SearchRequest *req = apdu_req->u.searchRequest;
282 std::string resultSetId = req->resultSetName;
285 std::list<std::string> databases;
287 for (i = 0; i<req->num_databaseNames; i++)
288 databases.push_back(req->databaseNames[i]);
290 Sets_it sets_it = m_sets.find(req->resultSetName);
291 if (sets_it != m_sets.end())
293 // result set already exist
294 // if replace indicator is off: we return diagnostic if
295 // result set already exist.
296 if (*req->replaceIndicator == 0)
299 odr.create_searchResponse(
301 YAZ_BIB1_RESULT_SET_EXISTS_AND_REPLACE_INDICATOR_OFF,
303 package.response() = apdu;
307 sets_it->second.m_backend->m_number_of_sets--;
309 // pick up any existing database with named result sets ..
310 // or one which has no result sets.. yet.
311 BackendPtr b; // null for now
312 std::list<BackendPtr>::const_iterator map_it;
313 map_it = m_backend_list.begin();
314 for (; map_it != m_backend_list.end(); map_it++)
316 BackendPtr tmp = *map_it;
317 if (tmp->m_frontend_databases == databases &&
318 (tmp->m_named_result_sets ||
319 tmp->m_number_of_sets == 0))
325 if (!b) // no backend yet. Must create a new one
329 b = init_backend(databases, package, error_code, addinfo);
332 // did not get a backend (unavailable somehow?)
335 odr.create_searchResponse(
336 apdu_req, error_code, addinfo.c_str());
337 package.response() = apdu;
341 m_sets.erase(req->resultSetName);
342 // sending search to backend
343 Package search_package(b->m_backend_session, package.origin());
345 search_package.copy_filter(package);
347 std::string backend_setname;
348 if (b->m_named_result_sets)
350 backend_setname = std::string(req->resultSetName);
354 backend_setname = "default";
355 req->resultSetName = odr_strdup(odr, backend_setname.c_str());
358 // pick first targets spec and move the databases from it ..
359 std::list<std::string>::const_iterator t_it = b->m_targets.begin();
360 if (t_it != b->m_targets.end())
362 mp::util::set_databases_from_zurl(odr, *t_it,
363 &req->num_databaseNames,
364 &req->databaseNames);
367 if (b->query_encoding.length() &&
368 (req->query->which == Z_Query_type_1 ||
369 req->query->which == Z_Query_type_101))
371 yaz_iconv_t cd = yaz_iconv_open(b->query_encoding.c_str(), "UTF-8");
374 int r = yaz_query_charset_convert_rpnquery_check(
375 req->query->u.type_1, odr, cd);
378 yaz_log(YLOG_LOG, "query could not be converted");
381 *req->replaceIndicator = 1;
383 search_package.request() = yazpp_1::GDU(apdu_req);
385 search_package.move(b->m_route);
387 if (search_package.session().is_closed())
389 package.response() = search_package.response();
390 package.session().close();
393 b->m_number_of_sets++;
395 m_sets[resultSetId] = VirtualDB::Set(b, backend_setname);
396 fixup_package(search_package, b);
397 package.response() = search_package.response();
400 yf::VirtualDB::Frontend::Frontend(Rep *rep)
403 m_is_virtual = false;
406 void yf::VirtualDB::Frontend::close(mp::Package &package)
408 std::list<BackendPtr>::const_iterator b_it;
410 for (b_it = m_backend_list.begin(); b_it != m_backend_list.end(); b_it++)
412 (*b_it)->m_backend_session.close();
413 Package close_package((*b_it)->m_backend_session, package.origin());
414 close_package.copy_filter(package);
415 close_package.move((*b_it)->m_route);
417 m_backend_list.clear();
420 yf::VirtualDB::Frontend::~Frontend()
424 yf::VirtualDB::FrontendPtr yf::VirtualDB::Rep::get_frontend(mp::Package &package)
426 boost::mutex::scoped_lock lock(m_mutex);
428 std::map<mp::Session,yf::VirtualDB::FrontendPtr>::iterator it;
432 it = m_clients.find(package.session());
433 if (it == m_clients.end())
436 if (!it->second->m_in_use)
438 it->second->m_in_use = true;
441 m_cond_session_ready.wait(lock);
443 FrontendPtr f(new Frontend(this));
444 m_clients[package.session()] = f;
449 void yf::VirtualDB::Rep::release_frontend(mp::Package &package)
451 boost::mutex::scoped_lock lock(m_mutex);
452 std::map<mp::Session,yf::VirtualDB::FrontendPtr>::iterator it;
454 it = m_clients.find(package.session());
455 if (it != m_clients.end())
457 if (package.session().is_closed())
459 it->second->close(package);
464 it->second->m_in_use = false;
466 m_cond_session_ready.notify_all();
470 void yf::VirtualDB::Rep::refresh_torus(void)
472 xmlDoc *doc = torus.get_doc();
476 xmlNode *ptr1 = xmlDocGetRootElement(doc);
480 for (ptr1 = ptr1->children; ptr1; ptr1 = ptr1->next)
482 if (ptr1->type != XML_ELEMENT_NODE)
484 if (!strcmp((const char *) ptr1->name, "record"))
486 xmlNode *ptr2 = ptr1;
487 for (ptr2 = ptr2->children; ptr2; ptr2 = ptr2->next)
489 if (ptr2->type != XML_ELEMENT_NODE)
491 if (!strcmp((const char *) ptr2->name, "layer"))
493 std::string database;
497 std::string query_encoding;
498 xmlNode *ptr3 = ptr2;
499 for (ptr3 = ptr3->children; ptr3; ptr3 = ptr3->next)
501 if (ptr3->type != XML_ELEMENT_NODE)
503 if (!strcmp((const char *) ptr3->name, "id"))
505 database = mp::xml::get_text(ptr3);
507 else if (!strcmp((const char *) ptr3->name, "zurl"))
509 target = mp::xml::get_text(ptr3);
511 else if (!strcmp((const char *) ptr3->name, "sru"))
513 solr = mp::xml::get_text(ptr3);
515 else if (!strcmp((const char *) ptr3->name,
518 query_encoding = mp::xml::get_text(ptr3);
521 if (solr.length() == 0 &&
522 database.length() && target.length())
525 mp::util::database_name_normalize(database),
527 vmap.query_encoding = query_encoding;
528 m_maps.push_back(vmap);
536 yf::VirtualDB::Set::Set(BackendPtr b, std::string setname)
537 : m_backend(b), m_setname(setname)
542 yf::VirtualDB::Set::Set()
547 yf::VirtualDB::Set::~Set()
551 yf::VirtualDB::Map::Map(std::string database,
552 std::list<std::string> targets, std::string route)
553 : m_dbpattern(database), m_targets(targets), m_route(route)
557 yf::VirtualDB::Map::Map(std::string database,
558 std::string target, std::string route)
559 : m_dbpattern(database), m_route(route)
561 m_targets.push_back(target);
565 yf::VirtualDB::Map::Map()
569 bool yf::VirtualDB::Map::match(const std::string db) const
571 std::string norm_db = mp::util::database_name_normalize(db);
572 if (yaz_match_glob(m_dbpattern.c_str(), norm_db.c_str()))
577 yf::VirtualDB::VirtualDB() : m_p(new VirtualDB::Rep)
579 m_p->pass_vhosts = false;
582 yf::VirtualDB::~VirtualDB() {
585 void yf::VirtualDB::Frontend::fixup_npr_record(ODR odr, Z_NamePlusRecord *npr,
588 if (npr->databaseName)
590 std::string b_database = std::string(npr->databaseName);
592 // consider each of the frontend databases..
593 std::list<std::string>::const_iterator db_it;
594 for (db_it = b->m_frontend_databases.begin();
595 db_it != b->m_frontend_databases.end(); db_it++)
597 // see which target it corresponds to.. (if any)
598 std::list<VirtualDB::Map>::const_iterator map_it =
600 while (map_it != m_p->m_maps.end())
602 if (map_it->match(*db_it))
606 if (map_it != m_p->m_maps.end())
608 std::list<std::string>::const_iterator t
609 = map_it->m_targets.begin();
610 while (t != map_it->m_targets.end())
612 if (*t == b_database)
614 npr->databaseName = odr_strdup(odr, (*db_it).c_str());
622 db_it = b->m_frontend_databases.begin();
623 if (db_it != b->m_frontend_databases.end())
625 std::string database = *db_it;
626 npr->databaseName = odr_strdup(odr, database.c_str());
631 void yf::VirtualDB::Frontend::fixup_npr_records(ODR odr, Z_Records *records,
634 if (records && records->which == Z_Records_DBOSD)
636 Z_NamePlusRecordList *nprlist = records->u.databaseOrSurDiagnostics;
638 for (i = 0; i < nprlist->num_records; i++)
640 fixup_npr_record(odr, nprlist->records[i], b);
645 void yf::VirtualDB::Frontend::fixup_package(mp::Package &p, BackendPtr b)
647 Z_GDU *gdu = p.response().get();
650 if (gdu && gdu->which == Z_GDU_Z3950)
652 Z_APDU *apdu = gdu->u.z3950;
653 if (apdu->which == Z_APDU_presentResponse)
655 fixup_npr_records(odr, apdu->u.presentResponse->records, b);
658 else if (apdu->which == Z_APDU_searchResponse)
660 fixup_npr_records(odr, apdu->u.searchResponse->records, b);
666 void yf::VirtualDB::Frontend::present(mp::Package &package, Z_APDU *apdu_req)
668 Z_PresentRequest *req = apdu_req->u.presentRequest;
669 std::string resultSetId = req->resultSetId;
672 Sets_it sets_it = m_sets.find(resultSetId);
673 if (sets_it == m_sets.end())
676 odr.create_presentResponse(
678 YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST,
679 resultSetId.c_str());
680 package.response() = apdu;
684 new mp::Session(sets_it->second.m_backend->m_backend_session);
686 // sending present to backend
687 Package present_package(*id, package.origin());
688 present_package.copy_filter(package);
690 req->resultSetId = odr_strdup(odr, sets_it->second.m_setname.c_str());
692 present_package.request() = yazpp_1::GDU(apdu_req);
694 present_package.move(sets_it->second.m_backend->m_route);
696 fixup_package(present_package, sets_it->second.m_backend);
698 if (present_package.session().is_closed())
700 package.response() = present_package.response();
701 package.session().close();
706 package.response() = present_package.response();
711 int yf::VirtualDB::Frontend::relay_apdu(mp::Package &package, Z_APDU *apdu_req)
714 std::list<BackendPtr>::const_iterator map_it;
715 map_it = m_backend_list.begin();
716 for (; map_it != m_backend_list.end(); map_it++)
718 BackendPtr b = *map_it;
720 Package relay_package(b->m_backend_session, package.origin());
721 relay_package.copy_filter(package);
723 relay_package.request() = yazpp_1::GDU(apdu_req);
725 relay_package.move(b->m_route);
726 package.response() = relay_package.response();
732 void yf::VirtualDB::Frontend::scan(mp::Package &package, Z_APDU *apdu_req)
734 Z_ScanRequest *req = apdu_req->u.scanRequest;
738 std::list<std::string> databases;
740 for (i = 0; i<req->num_databaseNames; i++)
741 databases.push_back(req->databaseNames[i]);
744 // pick up any existing backend with a database match
745 std::list<BackendPtr>::const_iterator map_it;
746 map_it = m_backend_list.begin();
747 for (; map_it != m_backend_list.end(); map_it++)
749 BackendPtr tmp = *map_it;
750 if (tmp->m_frontend_databases == databases)
753 if (map_it != m_backend_list.end())
755 if (!b) // no backend yet. Must create a new one
759 b = init_backend(databases, package, error_code, addinfo);
762 // did not get a backend (unavailable somehow?)
764 odr.create_scanResponse(
765 apdu_req, error_code, addinfo.c_str());
766 package.response() = apdu;
771 // sending scan to backend
772 Package scan_package(b->m_backend_session, package.origin());
774 scan_package.copy_filter(package);
776 // pick first targets spec and move the databases from it ..
777 std::list<std::string>::const_iterator t_it = b->m_targets.begin();
778 if (t_it != b->m_targets.end())
780 mp::util::set_databases_from_zurl(odr, *t_it,
781 &req->num_databaseNames,
782 &req->databaseNames);
785 if (b->query_encoding.length())
787 yaz_iconv_t cd = yaz_iconv_open(b->query_encoding.c_str(), "UTF-8");
790 yaz_query_charset_convert_apt(req->termListAndStartPoint, odr, cd);
795 scan_package.request() = yazpp_1::GDU(apdu_req);
797 scan_package.move(b->m_route);
799 if (scan_package.session().is_closed())
801 package.response() = scan_package.response();
802 package.session().close();
805 package.response() = scan_package.response();
809 void yf::VirtualDB::add_map_db2targets(std::string db,
810 std::list<std::string> targets,
813 m_p->m_maps.push_back(
814 VirtualDB::Map(mp::util::database_name_normalize(db), targets, route));
818 void yf::VirtualDB::add_map_db2target(std::string db,
823 m_p->m_maps.push_back(
824 VirtualDB::Map(mp::util::database_name_normalize(db), target, route));
827 void yf::VirtualDB::process(mp::Package &package) const
829 FrontendPtr f = m_p->get_frontend(package);
831 Z_GDU *gdu = package.request().get();
833 if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
834 Z_APDU_initRequest && !f->m_is_virtual)
836 Z_InitRequest *req = gdu->u.z3950->u.initRequest;
838 std::list<std::string> vhosts;
839 mp::util::get_vhost_otherinfo(req->otherInfo, vhosts);
841 if (vhosts.size() > 0 && m_p->pass_vhosts)
850 Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
851 Z_InitResponse *resp = apdu->u.initResponse;
854 static const int masks[] = {
857 Z_Options_namedResultSets,
861 for (i = 0; masks[i] != -1; i++)
862 if (ODR_MASK_GET(req->options, masks[i]))
863 ODR_MASK_SET(resp->options, masks[i]);
865 static const int versions[] = {
871 for (i = 0; versions[i] != -1; i++)
872 if (ODR_MASK_GET(req->protocolVersion, versions[i]))
873 ODR_MASK_SET(resp->protocolVersion, versions[i]);
877 *resp->preferredMessageSize = *req->preferredMessageSize;
878 *resp->maximumRecordSize = *req->maximumRecordSize;
880 package.response() = apdu;
881 f->m_is_virtual = true;
884 else if (!f->m_is_virtual)
886 else if (gdu && gdu->which == Z_GDU_Z3950)
888 Z_APDU *apdu = gdu->u.z3950;
889 if (apdu->which == Z_APDU_initRequest)
893 package.response() = odr.create_close(
895 Z_Close_protocolError,
898 package.session().close();
900 else if (apdu->which == Z_APDU_searchRequest)
902 f->search(package, apdu);
904 else if (apdu->which == Z_APDU_presentRequest)
906 f->present(package, apdu);
908 else if (apdu->which == Z_APDU_scanRequest)
910 f->scan(package, apdu);
912 else if (apdu->which == Z_APDU_close)
914 if (f->relay_apdu(package, apdu) == 0)
918 package.response() = odr.create_close(
919 apdu, Z_Close_finished, "virt_db");
921 package.session().close();
928 package.response() = odr.create_close(
929 apdu, Z_Close_protocolError,
930 "unsupported APDU in filter_virt_db");
932 package.session().close();
935 m_p->release_frontend(package);
938 void mp::filter::VirtualDB::configure(const xmlNode * ptr, bool test_only)
940 for (ptr = ptr->children; ptr; ptr = ptr->next)
942 if (ptr->type != XML_ELEMENT_NODE)
944 if (!strcmp((const char *) ptr->name, "pass-vhosts"))
946 m_p->pass_vhosts = mp::xml::get_bool(ptr, false);
948 else if (!strcmp((const char *) ptr->name, "virtual"))
950 std::string query_encoding;
951 std::string database;
952 std::list<std::string> targets;
953 xmlNode *v_node = ptr->children;
954 for (; v_node; v_node = v_node->next)
956 if (v_node->type != XML_ELEMENT_NODE)
959 if (mp::xml::is_element_mp(v_node, "database"))
960 database = mp::xml::get_text(v_node);
961 else if (mp::xml::is_element_mp(v_node, "target"))
962 targets.push_back(mp::xml::get_text(v_node));
963 else if (mp::xml::is_element_mp(v_node, "query-encoding"))
964 targets.push_back(mp::xml::get_text(v_node));
966 throw mp::filter::FilterException
968 + std::string((const char *) v_node->name)
969 + " in virtual section"
972 std::string route = mp::xml::get_route(ptr);
974 VirtualDB::Map vmap(mp::util::database_name_normalize(database),
976 vmap.query_encoding = query_encoding;
977 m_p->m_maps.push_back(vmap);
979 else if (!strcmp((const char *) ptr->name, "torus"))
982 const struct _xmlAttr *attr;
983 for (attr = ptr->properties; attr; attr = attr->next)
985 if (!strcmp((const char *) attr->name, "url"))
986 url = mp::xml::get_text(attr->children);
988 throw mp::filter::FilterException(
989 "Bad attribute " + std::string((const char *)
992 m_p->torus.read_searchables(url);
993 m_p->refresh_torus();
997 throw mp::filter::FilterException
999 + std::string((const char *) ptr->name)
1000 + " in virt_db filter");
1005 static mp::filter::Base* filter_creator()
1007 return new mp::filter::VirtualDB;
1011 struct metaproxy_1_filter_struct metaproxy_1_filter_virt_db = {
1022 * c-file-style: "Stroustrup"
1023 * indent-tabs-mode: nil
1025 * vim: shiftwidth=4 tabstop=8 expandtab