1 /* This file is part of Metaproxy.
2 Copyright (C) 2005-2012 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_z3950_client.hpp"
22 #include <metaproxy/package.hpp>
23 #include <metaproxy/util.hpp>
30 #include <boost/thread/mutex.hpp>
31 #include <boost/thread/condition.hpp>
32 #include <boost/thread/xtime.hpp>
36 #include <yaz/otherinfo.h>
37 #include <yaz/diagbib1.h>
39 #include <yazpp/socket-manager.h>
40 #include <yazpp/pdu-assoc.h>
41 #include <yazpp/z-assoc.h>
43 namespace mp = metaproxy_1;
44 namespace yf = mp::filter;
46 namespace metaproxy_1 {
48 class Z3950Client::Assoc : public yazpp_1::Z_Assoc{
50 Assoc(yazpp_1::SocketManager *socket_manager,
51 yazpp_1::IPDU_Observable *PDU_Observable,
52 std::string host, int timeout);
57 void recv_GDU(Z_GDU *gdu, int len);
58 void fixup_nsd(ODR odr, Z_Records *records);
59 void fixup_nsd(ODR odr, Z_DefaultDiagFormat *nsd);
60 void fixup_init(ODR odr, Z_InitResponse *initrs);
61 yazpp_1::IPDU_Observer* sessionNotify(
62 yazpp_1::IPDU_Observable *the_PDU_Observable,
65 yazpp_1::SocketManager *m_socket_manager;
66 yazpp_1::IPDU_Observable *m_PDU_Observable;
76 int m_time_connect_max;
80 class Z3950Client::Rep {
82 // number of seconds to wait before we give up request
86 std::string m_default_target;
87 std::string m_force_target;
89 boost::condition m_cond_session_ready;
90 std::map<mp::Session,Z3950Client::Assoc *> m_clients;
91 Z3950Client::Assoc *get_assoc(Package &package);
92 void send_and_receive(Package &package,
93 yf::Z3950Client::Assoc *c);
94 void release_assoc(Package &package);
101 yf::Z3950Client::Assoc::Assoc(yazpp_1::SocketManager *socket_manager,
102 yazpp_1::IPDU_Observable *PDU_Observable,
103 std::string host, int timeout_sec)
104 : Z_Assoc(PDU_Observable),
105 m_socket_manager(socket_manager), m_PDU_Observable(PDU_Observable),
106 m_package(0), m_in_use(true), m_waiting(false),
107 m_destroyed(false), m_connected(false), m_has_closed(false),
109 m_time_elapsed(0), m_time_max(timeout_sec), m_time_connect_max(10),
112 // std::cout << "create assoc " << this << "\n";
115 yf::Z3950Client::Assoc::~Assoc()
117 // std::cout << "destroy assoc " << this << "\n";
120 void yf::Z3950Client::Assoc::connectNotify()
127 void yf::Z3950Client::Assoc::failNotify()
135 Z_GDU *gdu = m_package->request().get();
137 if (gdu && gdu->which == Z_GDU_Z3950)
140 m_package->response() = odr.create_close(apdu, Z_Close_peerAbort, 0);
141 m_package->session().close();
145 void yf::Z3950Client::Assoc::timeoutNotify()
148 if ((m_connected && m_time_elapsed >= m_time_max)
149 || (!m_connected && m_time_elapsed >= m_time_connect_max))
157 Z_GDU *gdu = m_package->request().get();
159 if (gdu && gdu->which == Z_GDU_Z3950)
163 m_package->response() =
164 odr.create_close(apdu, Z_Close_lackOfActivity, 0);
166 m_package->response() =
167 odr.create_close(apdu, Z_Close_peerAbort, 0);
169 m_package->session().close();
174 void yf::Z3950Client::Assoc::fixup_nsd(ODR odr, Z_DefaultDiagFormat *nsd)
178 // should really check for nsd->which.. But union has two members
179 // containing almost same data
180 const char *v2Addinfo = nsd->u.v2Addinfo;
181 // Z_InternationalString *v3Addinfo;
182 if (v2Addinfo && *v2Addinfo)
184 addinfo.assign(nsd->u.v2Addinfo);
187 addinfo += "(backend=" + m_host + ")";
188 nsd->u.v2Addinfo = odr_strdup(odr, addinfo.c_str());
191 void yf::Z3950Client::Assoc::fixup_nsd(ODR odr, Z_Records *records)
193 if (records && records->which == Z_Records_NSD)
195 fixup_nsd(odr, records->u.nonSurrogateDiagnostic);
197 if (records && records->which == Z_Records_multipleNSD)
199 Z_DiagRecs *drecs = records->u.multipleNonSurDiagnostics;
201 for (i = 0; i < drecs->num_diagRecs; i++)
203 Z_DiagRec *dr = drecs->diagRecs[i];
205 if (dr->which == Z_DiagRec_defaultFormat)
206 fixup_nsd(odr, dr->u.defaultFormat);
211 void yf::Z3950Client::Assoc::fixup_init(ODR odr, Z_InitResponse *initrs)
213 Z_External *uif = initrs->userInformationField;
215 if (uif && uif->which == Z_External_userInfo1)
217 Z_OtherInformation *ui = uif->u.userInfo1;
219 for (i = 0; i < ui->num_elements; i++)
221 Z_OtherInformationUnit *unit = ui->list[i];
222 if (unit->which == Z_OtherInfo_externallyDefinedInfo &&
223 unit->information.externallyDefinedInfo &&
224 unit->information.externallyDefinedInfo->which ==
227 Z_DiagnosticFormat *diag =
228 unit->information.externallyDefinedInfo->u.diag1;
230 for (j = 0; j < diag->num; j++)
232 Z_DiagnosticFormat_s *ds = diag->elements[j];
233 if (ds->which == Z_DiagnosticFormat_s_defaultDiagRec)
235 Z_DefaultDiagFormat *r = ds->u.defaultDiagRec;
236 char *oaddinfo = r->u.v2Addinfo;
237 char *naddinfo = (char *) odr_malloc(
239 (oaddinfo ? strlen(oaddinfo) : 0) + 20 +
241 if (oaddinfo && *oaddinfo)
243 strcpy(naddinfo, oaddinfo);
244 strcat(naddinfo, " ");
246 strcat(naddinfo, "(backend=");
247 strcat(naddinfo, m_host.c_str());
248 strcat(naddinfo, ")");
250 r->u.v2Addinfo = naddinfo;
258 void yf::Z3950Client::Assoc::recv_GDU(Z_GDU *gdu, int len)
264 mp::odr odr; // must be in scope for response() = assignment
265 if (gdu && gdu->which == Z_GDU_Z3950)
267 Z_APDU *apdu = gdu->u.z3950;
270 case Z_APDU_searchResponse:
271 fixup_nsd(odr, apdu->u.searchResponse->records);
273 case Z_APDU_presentResponse:
274 fixup_nsd(odr, apdu->u.presentResponse->records);
276 case Z_APDU_initResponse:
277 fixup_init(odr, apdu->u.initResponse);
281 m_package->response() = gdu;
285 yazpp_1::IPDU_Observer *yf::Z3950Client::Assoc::sessionNotify(
286 yazpp_1::IPDU_Observable *the_PDU_Observable,
293 yf::Z3950Client::Z3950Client() : m_p(new yf::Z3950Client::Rep)
295 m_p->m_timeout_sec = 30;
296 m_p->m_max_sockets = 0;
297 m_p->m_force_close = false;
300 yf::Z3950Client::~Z3950Client() {
303 yf::Z3950Client::Assoc *yf::Z3950Client::Rep::get_assoc(Package &package)
305 // only one thread messes with the clients list at a time
306 boost::mutex::scoped_lock lock(m_mutex);
308 std::map<mp::Session,yf::Z3950Client::Assoc *>::iterator it;
310 Z_GDU *gdu = package.request().get();
312 int max_sockets = package.origin().get_max_sockets();
313 if (max_sockets == 0)
314 max_sockets = m_max_sockets;
316 it = m_clients.find(package.session());
317 if (it != m_clients.end())
319 it->second->m_queue_len++;
323 // double init .. NOT working yet
324 if (gdu && gdu->which == Z_GDU_Z3950 &&
325 gdu->u.z3950->which == Z_APDU_initRequest)
327 yazpp_1::SocketManager *s = it->second->m_socket_manager;
328 delete it->second; // destroy Z_Assoc
329 delete s; // then manager
334 if (!it->second->m_in_use)
336 it->second->m_in_use = true;
339 m_cond_session_ready.wait(lock);
342 if (!gdu || gdu->which != Z_GDU_Z3950)
347 // new Z39.50 session ..
348 Z_APDU *apdu = gdu->u.z3950;
349 // check that it is init. If not, close
350 if (apdu->which != Z_APDU_initRequest)
354 package.response() = odr.create_close(apdu,
355 Z_Close_protocolError,
356 "First PDU was not an "
357 "Initialize Request");
358 package.session().close();
361 std::string target = m_force_target;
362 if (!target.length())
364 target = m_default_target;
365 std::list<std::string> vhosts;
366 mp::util::remove_vhost_otherinfo(&apdu->u.initRequest->otherInfo,
368 size_t no_vhosts = vhosts.size();
371 std::list<std::string>::const_iterator v_it = vhosts.begin();
374 else if (no_vhosts == 0)
376 if (!target.length())
378 // no default target. So we don't know where to connect
380 package.response() = odr.create_initResponse(
382 YAZ_BIB1_INIT_NEGOTIATION_OPTION_REQUIRED,
383 "z3950_client: No vhost given");
385 package.session().close();
389 else if (no_vhosts > 1)
392 package.response() = odr.create_initResponse(
394 YAZ_BIB1_COMBI_OF_SPECIFIED_DATABASES_UNSUPP,
395 "z3950_client: Can not cope with multiple vhosts");
396 package.session().close();
401 // see if we have reached max number of clients (max-sockets)
405 int no_not_in_use = 0;
407 it = m_clients.begin();
408 for (; it != m_clients.end(); it++)
410 yf::Z3950Client::Assoc *as = it->second;
411 if (!strcmp(as->m_host.c_str(), target.c_str()))
418 yaz_log(YLOG_LOG, "Found %d/%d connections for %s", number, max_sockets,
420 if (number < max_sockets)
422 if (no_not_in_use == 0) // all in use..
426 package.response() = odr.create_initResponse(
427 apdu, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, "max sessions");
428 package.session().close();
432 xtime_get(&xt, boost::TIME_UTC);
435 if (!m_cond_session_ready.timed_wait(lock, xt))
439 package.response() = odr.create_initResponse(
440 apdu, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR, "max sessions");
441 package.session().close();
446 yazpp_1::SocketManager *sm = new yazpp_1::SocketManager;
447 yazpp_1::PDU_Assoc *pdu_as = new yazpp_1::PDU_Assoc(sm);
448 yf::Z3950Client::Assoc *as = new yf::Z3950Client::Assoc(sm, pdu_as,
451 m_clients[package.session()] = as;
455 void yf::Z3950Client::Rep::send_and_receive(Package &package,
456 yf::Z3950Client::Assoc *c)
461 c->m_package = &package;
463 if (package.session().is_closed() && c->m_connected && !c->m_has_closed
468 package.request() = odr.create_close(
469 0, Z_Close_finished, "z3950_client");
470 c->m_package = 0; // don't inspect response
472 Z_GDU *gdu = package.request().get();
474 if (!gdu || gdu->which != Z_GDU_Z3950)
477 if (gdu->u.z3950->which == Z_APDU_close)
478 c->m_has_closed = true;
481 c->m_time_elapsed = 0;
485 if (c->client(c->m_host.c_str()))
489 odr.create_close(gdu->u.z3950, Z_Close_peerAbort, 0);
490 package.session().close();
493 c->timeout(1); // so timeoutNotify gets called once per second
496 while (!c->m_destroyed && c->m_waiting
497 && c->m_socket_manager->processEvent() > 0)
506 c->m_time_elapsed = 0;
509 // relay the package ..
511 c->send_GDU(gdu, &len);
513 switch (gdu->u.z3950->which)
515 case Z_APDU_triggerResourceControlRequest:
519 // for the rest: wait for a response PDU
520 while (!c->m_destroyed && c->m_waiting
521 && c->m_socket_manager->processEvent() > 0)
527 void yf::Z3950Client::Rep::release_assoc(Package &package)
529 boost::mutex::scoped_lock lock(m_mutex);
530 std::map<mp::Session,yf::Z3950Client::Assoc *>::iterator it;
532 it = m_clients.find(package.session());
533 if (it != m_clients.end())
535 it->second->m_in_use = false;
536 it->second->m_queue_len--;
538 if (package.session().is_closed())
540 // destroy hint (send_and_receive)
541 it->second->m_destroyed = true;
542 if (it->second->m_queue_len == 0)
544 yazpp_1::SocketManager *s = it->second->m_socket_manager;
545 delete it->second; // destroy Z_Assoc
546 delete s; // then manager
550 m_cond_session_ready.notify_all();
554 void yf::Z3950Client::process(Package &package) const
556 yf::Z3950Client::Assoc *c = m_p->get_assoc(package);
559 m_p->send_and_receive(package, c);
560 m_p->release_assoc(package);
564 void yf::Z3950Client::configure(const xmlNode *ptr, bool test_only,
567 for (ptr = ptr->children; ptr; ptr = ptr->next)
569 if (ptr->type != XML_ELEMENT_NODE)
571 if (!strcmp((const char *) ptr->name, "timeout"))
573 m_p->m_timeout_sec = mp::xml::get_int(ptr, 30);
575 else if (!strcmp((const char *) ptr->name, "default_target"))
577 m_p->m_default_target = mp::xml::get_text(ptr);
579 else if (!strcmp((const char *) ptr->name, "force_target"))
581 m_p->m_force_target = mp::xml::get_text(ptr);
583 else if (!strcmp((const char *) ptr->name, "max-sockets"))
585 m_p->m_max_sockets = mp::xml::get_int(ptr, 0);
587 else if (!strcmp((const char *) ptr->name, "force_close"))
589 m_p->m_force_close = mp::xml::get_bool(ptr, 0);
593 throw mp::filter::FilterException("Bad element "
594 + std::string((const char *)
600 static mp::filter::Base* filter_creator()
602 return new mp::filter::Z3950Client;
606 struct metaproxy_1_filter_struct metaproxy_1_filter_z3950_client = {
616 * c-file-style: "Stroustrup"
617 * indent-tabs-mode: nil
619 * vim: shiftwidth=4 tabstop=8 expandtab