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
20 #include "filter_zoom.hpp"
22 #include <metaproxy/package.hpp>
23 #include <metaproxy/util.hpp>
26 #include <boost/thread/mutex.hpp>
27 #include <boost/thread/condition.hpp>
28 #include <yaz/diagbib1.h>
31 #include <yaz/querytowrbuf.h>
33 namespace mp = metaproxy_1;
34 namespace yf = mp::filter;
36 namespace metaproxy_1 {
40 friend class Frontend;
42 ZOOM_connection m_connection;
43 ZOOM_resultset m_resultset;
44 std::string m_frontend_database;
48 void connect(std::string zurl, int *error, const char **addinfo);
49 void search_pqf(const char *pqf, Odr_int *hits,
50 int *error, const char **addinfo);
51 void set_option(const char *name, const char *value);
52 int get_error(const char **addinfo);
54 struct Zoom::Searchable {
55 std::string m_database;
57 std::string query_encoding;
59 Searchable(std::string norm_db, std::string target);
62 class Zoom::Frontend {
67 yazpp_1::GDU m_init_gdu;
68 std::list<BackendPtr> m_backend_list;
69 void handle_package(mp::Package &package);
70 void handle_search(mp::Package &package);
71 void handle_present(mp::Package &package);
72 BackendPtr get_backend_from_databases(std::string &database,
74 const char **addinfo);
80 friend class Frontend;
84 void process(metaproxy_1::Package & package);
85 void configure(const xmlNode * ptr, bool test_only);
87 FrontendPtr get_frontend(mp::Package &package);
88 void release_frontend(mp::Package &package);
89 void parse_torus(const xmlNode *ptr);
91 std::list<Zoom::Searchable>m_searchables;
93 std::map<mp::Session, FrontendPtr> m_clients;
95 boost::condition m_cond_session_ready;
101 // define Pimpl wrapper forwarding to Impl
103 yf::Zoom::Zoom() : m_p(new Impl)
108 { // must have a destructor because of boost::scoped_ptr
111 void yf::Zoom::configure(const xmlNode *xmlnode, bool test_only)
113 m_p->configure(xmlnode, test_only);
116 void yf::Zoom::process(mp::Package &package) const
118 m_p->process(package);
122 // define Implementation stuff
124 yf::Zoom::Backend::Backend()
126 m_connection = ZOOM_connection_create(0);
130 yf::Zoom::Backend::~Backend()
132 ZOOM_connection_destroy(m_connection);
133 ZOOM_resultset_destroy(m_resultset);
136 void yf::Zoom::Backend::connect(std::string zurl,
137 int *error, const char **addinfo)
139 ZOOM_connection_connect(m_connection, zurl.c_str(), 0);
140 *error = ZOOM_connection_error(m_connection, 0, addinfo);
141 yaz_log(YLOG_LOG, "ZOOM_connection_connect: error: %d", *error);
144 void yf::Zoom::Backend::search_pqf(const char *pqf, Odr_int *hits,
145 int *error, const char **addinfo)
147 yaz_log(YLOG_LOG, "ZOOM_connection_search_pqf pqf=%s", pqf);
148 m_resultset = ZOOM_connection_search_pqf(m_connection, pqf);
149 *error = ZOOM_connection_error(m_connection, 0, addinfo);
150 yaz_log(YLOG_LOG, "ZOOM_connection_search_pqf: error: %d", *error);
152 *hits = ZOOM_resultset_size(m_resultset);
157 void yf::Zoom::Backend::set_option(const char *name, const char *value)
159 ZOOM_connection_option_set(m_connection, name, value);
162 int yf::Zoom::Backend::get_error(const char **addinfo)
164 return ZOOM_connection_error(m_connection, 0, addinfo);
167 yf::Zoom::Searchable::Searchable(std::string database,
169 : m_database(database), m_target(target)
173 yf::Zoom::Searchable::~Searchable()
177 yf::Zoom::Frontend::Frontend(Impl *impl) :
178 m_p(impl), m_is_virtual(false), m_in_use(true)
182 yf::Zoom::Frontend::~Frontend()
186 yf::Zoom::FrontendPtr yf::Zoom::Impl::get_frontend(mp::Package &package)
188 boost::mutex::scoped_lock lock(m_mutex);
190 std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
194 it = m_clients.find(package.session());
195 if (it == m_clients.end())
198 if (!it->second->m_in_use)
200 it->second->m_in_use = true;
203 m_cond_session_ready.wait(lock);
205 FrontendPtr f(new Frontend(this));
206 m_clients[package.session()] = f;
211 void yf::Zoom::Impl::release_frontend(mp::Package &package)
213 boost::mutex::scoped_lock lock(m_mutex);
214 std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
216 it = m_clients.find(package.session());
217 if (it != m_clients.end())
219 if (package.session().is_closed())
225 it->second->m_in_use = false;
227 m_cond_session_ready.notify_all();
231 yf::Zoom::Impl::Impl()
235 yf::Zoom::Impl::~Impl()
239 void yf::Zoom::Impl::parse_torus(const xmlNode *ptr1)
243 for (ptr1 = ptr1->children; ptr1; ptr1 = ptr1->next)
245 if (ptr1->type != XML_ELEMENT_NODE)
247 if (!strcmp((const char *) ptr1->name, "record"))
249 const xmlNode *ptr2 = ptr1;
250 for (ptr2 = ptr2->children; ptr2; ptr2 = ptr2->next)
252 if (ptr2->type != XML_ELEMENT_NODE)
254 if (!strcmp((const char *) ptr2->name, "layer"))
256 std::string database;
260 std::string query_encoding;
261 const xmlNode *ptr3 = ptr2;
262 for (ptr3 = ptr3->children; ptr3; ptr3 = ptr3->next)
264 if (ptr3->type != XML_ELEMENT_NODE)
266 if (!strcmp((const char *) ptr3->name, "id"))
268 database = mp::xml::get_text(ptr3);
270 else if (!strcmp((const char *) ptr3->name, "zurl"))
272 target = mp::xml::get_text(ptr3);
274 else if (!strcmp((const char *) ptr3->name, "sru"))
276 sru = mp::xml::get_text(ptr3);
278 else if (!strcmp((const char *) ptr3->name,
281 query_encoding = mp::xml::get_text(ptr3);
284 if (database.length() && target.length())
286 yaz_log(YLOG_LOG, "add db=%s target=%s",
287 database.c_str(), target.c_str());
288 Zoom::Searchable searchable(
289 mp::util::database_name_normalize(database),
291 searchable.query_encoding = query_encoding;
292 searchable.sru = sru;
293 m_searchables.push_back(searchable);
302 void yf::Zoom::Impl::configure(const xmlNode *ptr, bool test_only)
304 for (ptr = ptr->children; ptr; ptr = ptr->next)
306 if (ptr->type != XML_ELEMENT_NODE)
308 if (!strcmp((const char *) ptr->name, "records"))
312 else if (!strcmp((const char *) ptr->name, "torus"))
315 const struct _xmlAttr *attr;
316 for (attr = ptr->properties; attr; attr = attr->next)
318 if (!strcmp((const char *) attr->name, "url"))
319 url = mp::xml::get_text(attr->children);
321 throw mp::filter::FilterException(
322 "Bad attribute " + std::string((const char *)
325 torus.read_searchables(url);
326 xmlDoc *doc = torus.get_doc();
329 xmlNode *ptr = xmlDocGetRootElement(doc);
335 throw mp::filter::FilterException
337 + std::string((const char *) ptr->name)
338 + " in zoom filter");
343 yf::Zoom::BackendPtr yf::Zoom::Frontend::get_backend_from_databases(
344 std::string &database, int *error, const char **addinfo)
346 std::list<BackendPtr>::const_iterator map_it;
347 map_it = m_backend_list.begin();
348 for (; map_it != m_backend_list.end(); map_it++)
349 if ((*map_it)->m_frontend_database == database)
352 std::list<Zoom::Searchable>::const_iterator map_s =
353 m_p->m_searchables.begin();
355 std::string c_db = mp::util::database_name_normalize(database);
357 while (map_s != m_p->m_searchables.end())
359 yaz_log(YLOG_LOG, "consider db=%s map db=%s",
360 database.c_str(), map_s->m_database.c_str());
361 if (c_db.compare(map_s->m_database) == 0)
365 if (map_s == m_p->m_searchables.end())
367 *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
368 *addinfo = database.c_str();
372 BackendPtr b(new Backend);
374 if (map_s->query_encoding.length())
375 b->set_option("rpnCharset", map_s->query_encoding.c_str());
378 if (map_s->sru.length())
380 url = "http://" + map_s->m_target;
381 b->set_option("sru", map_s->sru.c_str());
384 url = map_s->m_target;
386 b->connect(url, error, addinfo);
389 m_backend_list.push_back(b);
394 void yf::Zoom::Frontend::handle_search(mp::Package &package)
396 Z_GDU *gdu = package.request().get();
397 Z_APDU *apdu_req = gdu->u.z3950;
398 Z_APDU *apdu_res = 0;
400 Z_SearchRequest *sr = apdu_req->u.searchRequest;
401 if (sr->num_databaseNames != 1)
403 apdu_res = odr.create_searchResponse(
404 apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
405 package.response() = apdu_res;
411 std::string db(sr->databaseNames[0]);
412 BackendPtr b = get_backend_from_databases(db, &error, &addinfo);
416 odr.create_searchResponse(
417 apdu_req, error, addinfo);
418 package.response() = apdu_res;
421 Z_Query *query = sr->query;
422 if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
424 WRBUF w = wrbuf_alloc();
425 yaz_rpnquery_to_wrbuf(w, query->u.type_1);
428 const char *addinfo = 0;
430 b->search_pqf(wrbuf_cstr(w), &hits, &error, &addinfo);
434 odr.create_searchResponse(
435 apdu_req, error, addinfo);
436 apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
437 package.response() = apdu_res;
442 odr.create_searchResponse(
444 YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
445 package.response() = apdu_res;
450 void yf::Zoom::Frontend::handle_present(mp::Package &package)
452 Z_GDU *gdu = package.request().get();
453 Z_APDU *apdu_req = gdu->u.z3950;
455 package.response() = odr.create_close(
457 Z_Close_protocolError,
458 "zoom filter has not implemented present request yet");
459 package.session().close();
462 void yf::Zoom::Frontend::handle_package(mp::Package &package)
464 Z_GDU *gdu = package.request().get();
467 else if (gdu->which == Z_GDU_Z3950)
469 Z_APDU *apdu_req = gdu->u.z3950;
470 if (apdu_req->which == Z_APDU_initRequest)
473 package.response() = odr.create_close(
475 Z_Close_protocolError,
478 else if (apdu_req->which == Z_APDU_searchRequest)
480 handle_search(package);
482 else if (apdu_req->which == Z_APDU_presentRequest)
484 handle_present(package);
489 package.response() = odr.create_close(
491 Z_Close_protocolError,
492 "zoom filter cannot handle this APDU");
493 package.session().close();
498 package.session().close();
502 void yf::Zoom::Impl::process(mp::Package &package)
504 FrontendPtr f = get_frontend(package);
505 Z_GDU *gdu = package.request().get();
509 f->handle_package(package);
511 else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
514 Z_InitRequest *req = gdu->u.z3950->u.initRequest;
518 Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
519 Z_InitResponse *resp = apdu->u.initResponse;
522 static const int masks[] = {
527 for (i = 0; masks[i] != -1; i++)
528 if (ODR_MASK_GET(req->options, masks[i]))
529 ODR_MASK_SET(resp->options, masks[i]);
531 static const int versions[] = {
537 for (i = 0; versions[i] != -1; i++)
538 if (ODR_MASK_GET(req->protocolVersion, versions[i]))
539 ODR_MASK_SET(resp->protocolVersion, versions[i]);
543 *resp->preferredMessageSize = *req->preferredMessageSize;
544 *resp->maximumRecordSize = *req->maximumRecordSize;
546 package.response() = apdu;
547 f->m_is_virtual = true;
552 release_frontend(package);
556 static mp::filter::Base* filter_creator()
558 return new mp::filter::Zoom;
562 struct metaproxy_1_filter_struct metaproxy_1_filter_zoom = {
573 * c-file-style: "Stroustrup"
574 * indent-tabs-mode: nil
576 * vim: shiftwidth=4 tabstop=8 expandtab