1 /* This file is part of Metaproxy.
2 Copyright (C) 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>
38 #include <yaz/oid_db.h>
40 #include <yazpp/socket-manager.h>
41 #include <yazpp/pdu-assoc.h>
42 #include <yazpp/z-assoc.h>
44 namespace mp = metaproxy_1;
45 namespace yf = mp::filter;
47 namespace metaproxy_1 {
49 class Z3950Client::Assoc : public yazpp_1::Z_Assoc{
51 Assoc(yazpp_1::SocketManager *socket_manager,
52 yazpp_1::IPDU_Observable *PDU_Observable,
53 std::string host, int timeout);
58 void recv_GDU(Z_GDU *gdu, int len);
59 void fixup_nsd(ODR odr, Z_Records *records);
60 void fixup_nsd(ODR odr, Z_DefaultDiagFormat *nsd);
61 void fixup_init(ODR odr, Z_InitResponse *initrs);
62 yazpp_1::IPDU_Observer* sessionNotify(
63 yazpp_1::IPDU_Observable *the_PDU_Observable,
66 yazpp_1::SocketManager *m_socket_manager;
67 yazpp_1::IPDU_Observable *m_PDU_Observable;
77 int m_time_connect_max;
81 class Z3950Client::Rep {
83 // number of seconds to wait before we give up request
87 std::string m_default_target;
88 std::string m_force_target;
90 boost::condition m_cond_session_ready;
91 std::map<mp::Session,Z3950Client::Assoc *> m_clients;
92 Z3950Client::Assoc *get_assoc(Package &package);
93 void send_and_receive(Package &package,
94 yf::Z3950Client::Assoc *c);
95 void release_assoc(Package &package);
102 yf::Z3950Client::Assoc::Assoc(yazpp_1::SocketManager *socket_manager,
103 yazpp_1::IPDU_Observable *PDU_Observable,
104 std::string host, int timeout_sec)
105 : Z_Assoc(PDU_Observable),
106 m_socket_manager(socket_manager), m_PDU_Observable(PDU_Observable),
107 m_package(0), m_in_use(true), m_waiting(false),
108 m_destroyed(false), m_connected(false), m_has_closed(false),
110 m_time_elapsed(0), m_time_max(timeout_sec), m_time_connect_max(10),
113 // std::cout << "create assoc " << this << "\n";
116 yf::Z3950Client::Assoc::~Assoc()
118 // std::cout << "destroy assoc " << this << "\n";
121 void yf::Z3950Client::Assoc::connectNotify()
128 void yf::Z3950Client::Assoc::failNotify()
136 Z_GDU *gdu = m_package->request().get();
138 if (gdu && gdu->which == Z_GDU_Z3950)
141 m_package->response() = odr.create_close(apdu, Z_Close_peerAbort, 0);
142 m_package->session().close();
146 void yf::Z3950Client::Assoc::timeoutNotify()
149 if ((m_connected && m_time_elapsed >= m_time_max)
150 || (!m_connected && m_time_elapsed >= m_time_connect_max))
158 Z_GDU *gdu = m_package->request().get();
160 if (gdu && gdu->which == Z_GDU_Z3950)
164 m_package->response() =
165 odr.create_close(apdu, Z_Close_lackOfActivity, 0);
167 m_package->response() =
168 odr.create_close(apdu, Z_Close_peerAbort, 0);
170 m_package->session().close();
175 void yf::Z3950Client::Assoc::fixup_nsd(ODR odr, Z_DefaultDiagFormat *nsd)
179 // should really check for nsd->which.. But union has two members
180 // containing almost same data
181 const char *v2Addinfo = nsd->u.v2Addinfo;
182 // Z_InternationalString *v3Addinfo;
183 if (v2Addinfo && *v2Addinfo)
185 addinfo.assign(nsd->u.v2Addinfo);
188 addinfo += "(backend=" + m_host + ")";
189 nsd->u.v2Addinfo = odr_strdup(odr, addinfo.c_str());
192 void yf::Z3950Client::Assoc::fixup_nsd(ODR odr, Z_Records *records)
194 if (records && records->which == Z_Records_NSD)
196 fixup_nsd(odr, records->u.nonSurrogateDiagnostic);
198 if (records && records->which == Z_Records_multipleNSD)
200 Z_DiagRecs *drecs = records->u.multipleNonSurDiagnostics;
202 for (i = 0; i < drecs->num_diagRecs; i++)
204 Z_DiagRec *dr = drecs->diagRecs[i];
206 if (dr->which == Z_DiagRec_defaultFormat)
207 fixup_nsd(odr, dr->u.defaultFormat);
212 void yf::Z3950Client::Assoc::fixup_init(ODR odr, Z_InitResponse *initrs)
214 Z_External *uif = initrs->userInformationField;
216 if (uif && uif->which == Z_External_userInfo1)
218 Z_OtherInformation *ui = uif->u.userInfo1;
220 for (i = 0; i < ui->num_elements; i++)
222 Z_OtherInformationUnit *unit = ui->list[i];
223 if (unit->which == Z_OtherInfo_externallyDefinedInfo &&
224 unit->information.externallyDefinedInfo &&
225 unit->information.externallyDefinedInfo->which ==
228 Z_DiagnosticFormat *diag =
229 unit->information.externallyDefinedInfo->u.diag1;
231 for (j = 0; j < diag->num; j++)
233 Z_DiagnosticFormat_s *ds = diag->elements[j];
234 if (ds->which == Z_DiagnosticFormat_s_defaultDiagRec)
236 Z_DefaultDiagFormat *r = ds->u.defaultDiagRec;
237 char *oaddinfo = r->u.v2Addinfo;
238 char *naddinfo = (char *) odr_malloc(
240 (oaddinfo ? strlen(oaddinfo) : 0) + 20 +
243 if (oaddinfo && *oaddinfo)
245 strcat(naddinfo, oaddinfo);
246 strcat(naddinfo, " ");
248 strcat(naddinfo, "(backend=");
249 strcat(naddinfo, m_host.c_str());
250 strcat(naddinfo, ")");
252 r->u.v2Addinfo = naddinfo;
260 void yf::Z3950Client::Assoc::recv_GDU(Z_GDU *gdu, int len)
266 mp::odr odr; // must be in scope for response() = assignment
267 if (gdu && gdu->which == Z_GDU_Z3950)
269 Z_APDU *apdu = gdu->u.z3950;
272 case Z_APDU_searchResponse:
273 fixup_nsd(odr, apdu->u.searchResponse->records);
275 case Z_APDU_presentResponse:
276 fixup_nsd(odr, apdu->u.presentResponse->records);
278 case Z_APDU_initResponse:
279 fixup_init(odr, apdu->u.initResponse);
283 m_package->response() = gdu;
287 yazpp_1::IPDU_Observer *yf::Z3950Client::Assoc::sessionNotify(
288 yazpp_1::IPDU_Observable *the_PDU_Observable,
295 yf::Z3950Client::Z3950Client() : m_p(new yf::Z3950Client::Rep)
297 m_p->m_timeout_sec = 30;
298 m_p->m_max_sockets = 0;
299 m_p->m_force_close = false;
302 yf::Z3950Client::~Z3950Client() {
305 yf::Z3950Client::Assoc *yf::Z3950Client::Rep::get_assoc(Package &package)
307 // only one thread messes with the clients list at a time
308 boost::mutex::scoped_lock lock(m_mutex);
310 std::map<mp::Session,yf::Z3950Client::Assoc *>::iterator it;
312 Z_GDU *gdu = package.request().get();
314 int max_sockets = package.origin().get_max_sockets();
315 if (max_sockets == 0)
316 max_sockets = m_max_sockets;
318 it = m_clients.find(package.session());
319 if (it != m_clients.end())
321 it->second->m_queue_len++;
325 // double init .. NOT working yet
326 if (gdu && gdu->which == Z_GDU_Z3950 &&
327 gdu->u.z3950->which == Z_APDU_initRequest)
329 yazpp_1::SocketManager *s = it->second->m_socket_manager;
330 delete it->second; // destroy Z_Assoc
331 delete s; // then manager
336 if (!it->second->m_in_use)
338 it->second->m_in_use = true;
341 m_cond_session_ready.wait(lock);
344 if (!gdu || gdu->which != Z_GDU_Z3950)
349 // new Z39.50 session ..
350 Z_APDU *apdu = gdu->u.z3950;
351 // check that it is init. If not, close
352 if (apdu->which != Z_APDU_initRequest)
356 package.response() = odr.create_close(apdu,
357 Z_Close_protocolError,
358 "First PDU was not an "
359 "Initialize Request");
360 package.session().close();
363 std::string target = m_force_target;
364 if (!target.length())
366 target = m_default_target;
367 std::list<std::string> vhosts;
368 mp::util::remove_vhost_otherinfo(&apdu->u.initRequest->otherInfo,
370 size_t no_vhosts = vhosts.size();
373 std::list<std::string>::const_iterator v_it = vhosts.begin();
376 else if (no_vhosts == 0)
378 if (!target.length())
380 // no default target. So we don't know where to connect
382 package.response() = odr.create_initResponse(
384 YAZ_BIB1_INIT_NEGOTIATION_OPTION_REQUIRED,
385 "z3950_client: No vhost given");
387 package.session().close();
391 else if (no_vhosts > 1)
394 package.response() = odr.create_initResponse(
396 YAZ_BIB1_COMBI_OF_SPECIFIED_DATABASES_UNSUPP,
397 "z3950_client: Can not cope with multiple vhosts");
398 package.session().close();
403 // see if we have reached max number of clients (max-sockets)
407 int no_not_in_use = 0;
409 it = m_clients.begin();
410 for (; it != m_clients.end(); it++)
412 yf::Z3950Client::Assoc *as = it->second;
413 if (!strcmp(as->m_host.c_str(), target.c_str()))
420 yaz_log(YLOG_LOG, "Found %d/%d connections for %s", number, max_sockets,
422 if (number < max_sockets)
424 if (no_not_in_use == 0) // all in use..
428 package.response() = odr.create_initResponse(
429 apdu, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR,
430 "z3950_client: max sessions");
431 package.session().close();
436 #if BOOST_VERSION >= 105000
444 if (!m_cond_session_ready.timed_wait(lock, xt))
448 package.response() = odr.create_initResponse(
449 apdu, YAZ_BIB1_TEMPORARY_SYSTEM_ERROR,
450 "z3950_client: max sessions");
451 package.session().close();
456 yazpp_1::SocketManager *sm = new yazpp_1::SocketManager;
457 yazpp_1::PDU_Assoc *pdu_as = new yazpp_1::PDU_Assoc(sm);
458 yf::Z3950Client::Assoc *as = new yf::Z3950Client::Assoc(sm, pdu_as,
461 m_clients[package.session()] = as;
465 void yf::Z3950Client::Rep::send_and_receive(Package &package,
466 yf::Z3950Client::Assoc *c)
471 c->m_package = &package;
473 if (package.session().is_closed() && c->m_connected && !c->m_has_closed
478 package.request() = odr.create_close(
479 0, Z_Close_finished, "z3950_client");
480 c->m_package = 0; // don't inspect response
482 Z_GDU *gdu = package.request().get();
484 if (!gdu || gdu->which != Z_GDU_Z3950)
487 if (gdu->u.z3950->which == Z_APDU_close)
488 c->m_has_closed = true;
490 Z_APDU *apdu = gdu->u.z3950;
493 c->m_time_elapsed = 0;
497 if (c->client(c->m_host.c_str()))
501 odr.create_close(gdu->u.z3950, Z_Close_peerAbort, 0);
502 package.session().close();
505 c->timeout(1); // so timeoutNotify gets called once per second
508 while (!c->m_destroyed && c->m_waiting
509 && c->m_socket_manager->processEvent() > 0)
516 const char *peer_name2 = package.origin().get_address().c_str();
518 if (apdu->which == Z_APDU_initRequest && peer_name2)
520 Z_OtherInformation **oi = &apdu->u.initRequest->otherInfo;
522 yaz_oi_get_string_oid(oi, yaz_oid_userinfo_client_ip, 1, 1);
523 char *pcomb = (char *)
524 odr_malloc(odr, (peer_name1 ? strlen(peer_name1) : 0)
525 + strlen(peer_name2) + 4);
529 strcat(pcomb, peer_name1);
532 strcat(pcomb, peer_name2);
533 yaz_oi_set_string_oid(&apdu->u.initRequest->otherInfo,
534 odr, yaz_oid_userinfo_client_ip,
538 c->m_time_elapsed = 0;
541 // relay the package ..
543 c->send_GDU(gdu, &len);
545 switch (gdu->u.z3950->which)
547 case Z_APDU_triggerResourceControlRequest:
551 // for the rest: wait for a response PDU
552 while (!c->m_destroyed && c->m_waiting
553 && c->m_socket_manager->processEvent() > 0)
559 void yf::Z3950Client::Rep::release_assoc(Package &package)
561 boost::mutex::scoped_lock lock(m_mutex);
562 std::map<mp::Session,yf::Z3950Client::Assoc *>::iterator it;
564 it = m_clients.find(package.session());
565 if (it != m_clients.end())
567 it->second->m_in_use = false;
568 it->second->m_queue_len--;
570 if (package.session().is_closed())
572 // destroy hint (send_and_receive)
573 it->second->m_destroyed = true;
574 if (it->second->m_queue_len == 0)
576 yazpp_1::SocketManager *s = it->second->m_socket_manager;
577 delete it->second; // destroy Z_Assoc
578 delete s; // then manager
582 m_cond_session_ready.notify_all();
586 void yf::Z3950Client::process(Package &package) const
588 yf::Z3950Client::Assoc *c = m_p->get_assoc(package);
591 m_p->send_and_receive(package, c);
592 m_p->release_assoc(package);
596 void yf::Z3950Client::configure(const xmlNode *ptr, bool test_only,
599 for (ptr = ptr->children; ptr; ptr = ptr->next)
601 if (ptr->type != XML_ELEMENT_NODE)
603 if (!strcmp((const char *) ptr->name, "timeout"))
605 m_p->m_timeout_sec = mp::xml::get_int(ptr, 30);
607 else if (!strcmp((const char *) ptr->name, "default_target"))
609 m_p->m_default_target = mp::xml::get_text(ptr);
611 else if (!strcmp((const char *) ptr->name, "force_target"))
613 m_p->m_force_target = mp::xml::get_text(ptr);
615 else if (!strcmp((const char *) ptr->name, "max-sockets"))
617 m_p->m_max_sockets = mp::xml::get_int(ptr, 0);
619 else if (!strcmp((const char *) ptr->name, "force_close"))
621 m_p->m_force_close = mp::xml::get_bool(ptr, 0);
625 throw mp::filter::FilterException("Bad element "
626 + std::string((const char *)
632 static mp::filter::Base* filter_creator()
634 return new mp::filter::Z3950Client;
638 struct metaproxy_1_filter_struct metaproxy_1_filter_z3950_client = {
648 * c-file-style: "Stroustrup"
649 * indent-tabs-mode: nil
651 * vim: shiftwidth=4 tabstop=8 expandtab