2 * Copyright (c) 1998-2003, Index Data.
3 * See the file LICENSE for details.
5 * $Id: yaz-proxy.cpp,v 1.53 2003-10-08 09:49:05 adam Exp $
12 #include <yaz/diagbib1.h>
13 #include <yaz++/proxy.h>
15 static const char *apdu_name(Z_APDU *apdu)
19 case Z_APDU_initRequest:
21 case Z_APDU_initResponse:
22 return "initResponse";
23 case Z_APDU_searchRequest:
24 return "searchRequest";
25 case Z_APDU_searchResponse:
26 return "searchResponse";
27 case Z_APDU_presentRequest:
28 return "presentRequest";
29 case Z_APDU_presentResponse:
30 return "presentResponse";
31 case Z_APDU_deleteResultSetRequest:
32 return "deleteResultSetRequest";
33 case Z_APDU_deleteResultSetResponse:
34 return "deleteResultSetResponse";
35 case Z_APDU_scanRequest:
37 case Z_APDU_scanResponse:
38 return "scanResponse";
39 case Z_APDU_sortRequest:
41 case Z_APDU_sortResponse:
42 return "sortResponse";
43 case Z_APDU_extendedServicesRequest:
44 return "extendedServicesRequest";
45 case Z_APDU_extendedServicesResponse:
46 return "extendedServicesResponse";
53 Yaz_Proxy::Yaz_Proxy(IYaz_PDU_Observable *the_PDU_Observable) :
54 Yaz_Z_Assoc(the_PDU_Observable), m_bw_stat(60), m_pdu_stat(60)
56 m_PDU_Observable = the_PDU_Observable;
64 m_proxy_authentication = 0;
67 m_client_idletime = 600;
68 m_target_idletime = 600;
69 m_optimize = xstrdup ("1");
70 strcpy(m_session_str, "x");
72 m_bytes_sent = m_bytes_recv = 0;
76 m_max_record_retrieve = 0;
79 Yaz_Proxy::~Yaz_Proxy()
81 yaz_log(LOG_LOG, "%s Closed %d/%d sent/recv bytes total", m_session_str,
82 m_bytes_sent, m_bytes_recv);
83 xfree (m_proxyTarget);
84 xfree (m_default_target);
85 xfree (m_proxy_authentication);
89 int Yaz_Proxy::set_config(const char *config)
91 int r = m_config.read_xml(config);
95 void Yaz_Proxy::set_default_target(const char *target)
97 xfree (m_default_target);
100 m_default_target = (char *) xstrdup (target);
103 void Yaz_Proxy::set_proxy_authentication (const char *auth)
105 xfree (m_proxy_authentication);
106 m_proxy_authentication = 0;
108 m_proxy_authentication = (char *) xstrdup (auth);
111 IYaz_PDU_Observer *Yaz_Proxy::sessionNotify(IYaz_PDU_Observable
112 *the_PDU_Observable, int fd)
114 Yaz_Proxy *new_proxy = new Yaz_Proxy(the_PDU_Observable);
115 new_proxy->m_parent = this;
116 new_proxy->m_config = m_config;
117 new_proxy->timeout(m_client_idletime);
118 new_proxy->m_target_idletime = m_target_idletime;
119 new_proxy->set_default_target(m_default_target);
120 new_proxy->set_APDU_log(get_APDU_log());
121 new_proxy->set_proxy_authentication(m_proxy_authentication);
122 sprintf(new_proxy->m_session_str, "%ld:%d", (long) time(0), m_session_no);
124 yaz_log (LOG_LOG, "%s New session %s", new_proxy->m_session_str,
125 the_PDU_Observable->getpeername());
129 char *Yaz_Proxy::get_cookie(Z_OtherInformation **otherInfo)
132 Z_OtherInformationUnit *oi;
134 ent.proto = PROTO_Z3950;
135 ent.oclass = CLASS_USERINFO;
136 ent.value = (oid_value) VAL_COOKIE;
137 assert (oid_ent_to_oid (&ent, oid));
139 if (oid_ent_to_oid (&ent, oid) &&
140 (oi = update_otherInformation(otherInfo, 0, oid, 1, 1)) &&
141 oi->which == Z_OtherInfo_characterInfo)
142 return oi->information.characterInfo;
146 char *Yaz_Proxy::get_proxy(Z_OtherInformation **otherInfo)
149 Z_OtherInformationUnit *oi;
151 ent.proto = PROTO_Z3950;
152 ent.oclass = CLASS_USERINFO;
153 ent.value = (oid_value) VAL_PROXY;
154 if (oid_ent_to_oid (&ent, oid) &&
155 (oi = update_otherInformation(otherInfo, 0, oid, 1, 1)) &&
156 oi->which == Z_OtherInfo_characterInfo)
157 return oi->information.characterInfo;
161 const char *Yaz_Proxy::load_balance(const char **url)
163 int zurl_in_use[MAX_ZURL_PLEX];
167 for (i = 0; i<MAX_ZURL_PLEX; i++)
169 for (c = m_parent->m_clientPool; c; c = c->m_next)
171 for (i = 0; url[i]; i++)
172 if (!strcmp(url[i], c->get_hostname()))
177 for (i = 0; url[i]; i++)
179 yaz_log(LOG_DEBUG, "%s zurl=%s use=%d",
180 m_session_str, url[i], zurl_in_use[i]);
181 if (min > zurl_in_use[i])
184 min = zurl_in_use[i];
190 Yaz_ProxyClient *Yaz_Proxy::get_client(Z_APDU *apdu)
193 Yaz_Proxy *parent = m_parent;
194 Z_OtherInformation **oi;
195 Yaz_ProxyClient *c = m_client;
197 get_otherInfoAPDU(apdu, &oi);
198 char *cookie = get_cookie(oi);
202 const char *url[MAX_ZURL_PLEX];
203 const char *proxy_host = get_proxy(oi);
206 xfree(m_default_target);
207 m_default_target = xstrdup(proxy_host);
208 proxy_host = m_default_target;
211 int client_idletime = -1;
212 m_config.get_target_info(proxy_host, url, &m_keepalive, &m_bw_max,
213 &m_pdu_max, &m_max_record_retrieve,
214 &m_target_idletime, &client_idletime,
215 &parent->m_max_clients);
216 if (client_idletime != -1)
218 m_client_idletime = client_idletime;
219 timeout(m_client_idletime);
223 yaz_log(LOG_LOG, "%s No default target", m_session_str);
226 // we don't handle multiplexing for cookie session, so we just
227 // pick the first one in this case (anonymous users will be able
228 // to use any backend)
229 if (cookie && *cookie)
230 m_proxyTarget = (char*) xstrdup(url[0]);
232 m_proxyTarget = (char*) xstrdup(load_balance(url));
234 if (cookie && *cookie)
236 Yaz_ProxyClient *cc = 0;
238 for (c = parent->m_clientPool; c; c = c->m_next)
241 assert (*c->m_prev == c);
242 if (c->m_cookie && !strcmp(cookie,c->m_cookie) &&
243 !strcmp(m_proxyTarget, c->get_hostname()))
252 // The following handles "cancel"
253 // If connection is busy (waiting for PDU) and
254 // we have an initRequest we can safely do re-open
255 if (c->m_waiting && apdu->which == Z_APDU_initRequest)
257 yaz_log (LOG_LOG, "%s REOPEN target=%s", m_session_str,
260 c->client(m_proxyTarget);
265 c->m_last_resultCount = 0;
266 c->m_sr_transform = 0;
268 c->m_resultSetStartPoint = 0;
269 c->timeout(m_target_idletime);
271 c->m_seqno = parent->m_seqno;
272 if (c->m_server && c->m_server != this)
273 c->m_server->m_client = 0;
276 yaz_log (LOG_DEBUG, "get_client 1 %p %p", this, c);
282 Yaz_ProxyClient *cc = 0;
284 for (c = parent->m_clientPool; c; c = c->m_next)
287 assert (*c->m_prev == c);
288 if (c->m_server == 0 && c->m_cookie == 0 &&
289 !strcmp(m_proxyTarget, c->get_hostname()))
299 yaz_log (LOG_LOG, "%s REUSE %d %d %s",
301 c->m_seqno, parent->m_seqno, c->get_hostname());
303 c->m_seqno = parent->m_seqno;
304 assert(c->m_server == 0);
313 if (apdu->which != Z_APDU_initRequest)
315 yaz_log (LOG_LOG, "no first INIT!");
318 Z_InitRequest *initRequest = apdu->u.initRequest;
320 if (!initRequest->idAuthentication)
322 if (m_proxy_authentication)
324 initRequest->idAuthentication =
325 (Z_IdAuthentication *)
326 odr_malloc (odr_encode(),
327 sizeof(*initRequest->idAuthentication));
328 initRequest->idAuthentication->which =
329 Z_IdAuthentication_open;
330 initRequest->idAuthentication->u.open =
331 odr_strdup (odr_encode(), m_proxy_authentication);
335 // go through list of clients - and find the lowest/oldest one.
336 Yaz_ProxyClient *c_min = 0;
338 int no_of_clients = 0;
339 if (parent->m_clientPool)
340 yaz_log (LOG_DEBUG, "Existing sessions");
341 for (c = parent->m_clientPool; c; c = c->m_next)
343 yaz_log (LOG_DEBUG, " Session %-3d wait=%d %s cookie=%s", c->m_seqno,
344 c->m_waiting, c->get_hostname(),
345 c->m_cookie ? c->m_cookie : "");
347 if (min_seq < 0 || c->m_seqno < min_seq)
349 min_seq = c->m_seqno;
353 if (no_of_clients >= parent->m_max_clients)
356 if (c->m_waiting || strcmp(m_proxyTarget, c->get_hostname()))
358 yaz_log (LOG_LOG, "%s MAXCLIENTS Destroy %d",
359 m_session_str, c->m_seqno);
360 if (c->m_server && c->m_server != this)
366 yaz_log (LOG_LOG, "%s MAXCLIENTS Reuse %d %d %s",
368 c->m_seqno, parent->m_seqno, c->get_hostname());
372 c->m_cookie = xstrdup(cookie);
373 c->m_seqno = parent->m_seqno;
374 if (c->m_server && c->m_server != this)
376 c->m_server->m_client = 0;
385 yaz_log (LOG_LOG, "%s NEW %d %s",
386 m_session_str, parent->m_seqno, m_proxyTarget);
387 c = new Yaz_ProxyClient(m_PDU_Observable->clone());
388 c->m_next = parent->m_clientPool;
390 c->m_next->m_prev = &c->m_next;
391 parent->m_clientPool = c;
392 c->m_prev = &parent->m_clientPool;
398 c->m_cookie = xstrdup(cookie);
400 c->m_seqno = parent->m_seqno;
401 c->client(m_proxyTarget);
403 c->m_last_resultCount = 0;
406 c->m_sr_transform = 0;
408 c->m_resultSetStartPoint = 0;
413 yaz_log (LOG_DEBUG, "get_client 3 %p %p", this, c);
417 void Yaz_Proxy::display_diagrecs(Z_DiagRec **pp, int num)
420 for (i = 0; i<num; i++)
423 Z_DefaultDiagFormat *r;
424 Z_DiagRec *p = pp[i];
425 if (p->which != Z_DiagRec_defaultFormat)
427 yaz_log(LOG_LOG, "%s Error no diagnostics", m_session_str);
431 r = p->u.defaultFormat;
432 if (!(ent = oid_getentbyoid(r->diagnosticSetId)) ||
433 ent->oclass != CLASS_DIAGSET || ent->value != VAL_BIB1)
434 yaz_log(LOG_LOG, "%s Error unknown diagnostic set", m_session_str);
437 case Z_DefaultDiagFormat_v2Addinfo:
438 yaz_log(LOG_LOG, "%s Error %d %s:%s",
440 *r->condition, diagbib1_str(*r->condition),
443 case Z_DefaultDiagFormat_v3Addinfo:
444 yaz_log(LOG_LOG, "%s Error %d %s:%s",
446 *r->condition, diagbib1_str(*r->condition),
453 int Yaz_Proxy::send_to_client(Z_APDU *apdu)
456 if (apdu->which == Z_APDU_searchResponse)
458 Z_SearchResponse *sr = apdu->u.searchResponse;
459 Z_Records *p = sr->records;
460 if (p && p->which == Z_Records_NSD)
462 Z_DiagRec dr, *dr_p = &dr;
463 dr.which = Z_DiagRec_defaultFormat;
464 dr.u.defaultFormat = p->u.nonSurrogateDiagnostic;
466 display_diagrecs(&dr_p, 1);
471 yaz_log(LOG_LOG, "%s %d hits", m_session_str,
475 else if (apdu->which == Z_APDU_presentResponse)
477 Z_PresentResponse *sr = apdu->u.presentResponse;
478 Z_Records *p = sr->records;
479 if (p && p->which == Z_Records_NSD)
481 Z_DiagRec dr, *dr_p = &dr;
482 dr.which = Z_DiagRec_defaultFormat;
483 dr.u.defaultFormat = p->u.nonSurrogateDiagnostic;
485 display_diagrecs(&dr_p, 1);
488 int r = send_Z_PDU(apdu, &len);
489 yaz_log (LOG_LOG, "%s Sending %s to client %d bytes", m_session_str,
490 apdu_name(apdu), len);
492 m_bw_stat.add_bytes(len);
496 int Yaz_ProxyClient::send_to_target(Z_APDU *apdu)
499 int r = send_Z_PDU(apdu, &len);
500 yaz_log (LOG_LOG, "%s Sending %s to %s %d bytes",
502 apdu_name(apdu), get_hostname(), len);
507 Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
509 if (*m_parent->m_optimize == '0')
510 return apdu; // don't optimize result sets..
511 if (apdu->which == Z_APDU_presentRequest)
513 Z_PresentRequest *pr = apdu->u.presentRequest;
514 Z_NamePlusRecordList *npr;
515 int toget = *pr->numberOfRecordsRequested;
516 int start = *pr->resultSetStartPoint;
518 if (m_client->m_last_resultSetId &&
519 !strcmp(m_client->m_last_resultSetId, pr->resultSetId))
521 if (m_client->m_cache.lookup (odr_encode(), &npr, start, toget,
522 pr->preferredRecordSyntax,
523 pr->recordComposition))
525 yaz_log (LOG_LOG, "%s Returned cache records for present request",
527 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
528 new_apdu->u.presentResponse->referenceId = pr->referenceId;
530 new_apdu->u.presentResponse->numberOfRecordsReturned
531 = odr_intdup(odr_encode(), toget);
533 new_apdu->u.presentResponse->records = (Z_Records*)
534 odr_malloc(odr_encode(), sizeof(Z_Records));
535 new_apdu->u.presentResponse->records->which = Z_Records_DBOSD;
536 new_apdu->u.presentResponse->records->u.databaseOrSurDiagnostics = npr;
537 new_apdu->u.presentResponse->nextResultSetPosition =
538 odr_intdup(odr_encode(), start+toget);
540 send_to_client(new_apdu);
546 if (apdu->which != Z_APDU_searchRequest)
548 Z_SearchRequest *sr = apdu->u.searchRequest;
549 Yaz_Z_Query *this_query = new Yaz_Z_Query;
550 Yaz_Z_Databases this_databases;
552 this_databases.set(sr->num_databaseNames, (const char **)
555 this_query->set_Z_Query(sr->query);
558 this_query->print(query_str, sizeof(query_str)-1);
559 yaz_log(LOG_LOG, "%s Query %s", m_session_str, query_str);
561 if (m_client->m_last_ok && m_client->m_last_query &&
562 m_client->m_last_query->match(this_query) &&
563 !strcmp(m_client->m_last_resultSetId, sr->resultSetName) &&
564 m_client->m_last_databases.match(this_databases))
567 if (m_client->m_last_resultCount > *sr->smallSetUpperBound &&
568 m_client->m_last_resultCount < *sr->largeSetLowerBound)
570 Z_NamePlusRecordList *npr;
571 int toget = *sr->mediumSetPresentNumber;
572 Z_RecordComposition *comp = 0;
574 if (toget > m_client->m_last_resultCount)
575 toget = m_client->m_last_resultCount;
577 if (sr->mediumSetElementSetNames)
579 comp = (Z_RecordComposition *)
580 odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
581 comp->which = Z_RecordComp_simple;
582 comp->u.simple = sr->mediumSetElementSetNames;
585 if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
586 sr->preferredRecordSyntax, comp))
588 yaz_log (LOG_LOG, "%s Returned cache records for medium set",
590 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
591 new_apdu->u.searchResponse->referenceId = sr->referenceId;
592 new_apdu->u.searchResponse->resultCount =
593 &m_client->m_last_resultCount;
595 new_apdu->u.searchResponse->numberOfRecordsReturned
596 = odr_intdup(odr_encode(), toget);
598 new_apdu->u.searchResponse->presentStatus =
599 odr_intdup(odr_encode(), Z_PresentStatus_success);
600 new_apdu->u.searchResponse->records = (Z_Records*)
601 odr_malloc(odr_encode(), sizeof(Z_Records));
602 new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
603 new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
604 new_apdu->u.searchResponse->nextResultSetPosition =
605 odr_intdup(odr_encode(), toget+1);
606 send_to_client(new_apdu);
612 // send present request (medium size)
613 yaz_log (LOG_LOG, "%s Optimizing search for medium set",
616 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
617 Z_PresentRequest *pr = new_apdu->u.presentRequest;
618 pr->referenceId = sr->referenceId;
619 pr->resultSetId = sr->resultSetName;
620 pr->preferredRecordSyntax = sr->preferredRecordSyntax;
621 *pr->numberOfRecordsRequested = toget;
622 pr->recordComposition = comp;
623 m_client->m_sr_transform = 1;
627 else if (m_client->m_last_resultCount >= *sr->largeSetLowerBound ||
628 m_client->m_last_resultCount <= 0)
630 // large set. Return pseudo-search response immediately
631 yaz_log (LOG_LOG, "%s Optimizing search for large set",
633 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
634 new_apdu->u.searchResponse->referenceId = sr->referenceId;
635 new_apdu->u.searchResponse->resultCount =
636 &m_client->m_last_resultCount;
637 send_to_client(new_apdu);
642 Z_NamePlusRecordList *npr;
643 int toget = m_client->m_last_resultCount;
644 Z_RecordComposition *comp = 0;
646 // send a present request (small set)
648 if (sr->smallSetElementSetNames)
650 comp = (Z_RecordComposition *)
651 odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
652 comp->which = Z_RecordComp_simple;
653 comp->u.simple = sr->smallSetElementSetNames;
656 if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
657 sr->preferredRecordSyntax, comp))
659 yaz_log (LOG_LOG, "%s Returned cache records for small set",
661 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
662 new_apdu->u.searchResponse->referenceId = sr->referenceId;
663 new_apdu->u.searchResponse->resultCount =
664 &m_client->m_last_resultCount;
666 new_apdu->u.searchResponse->numberOfRecordsReturned
667 = odr_intdup(odr_encode(), toget);
669 new_apdu->u.searchResponse->presentStatus =
670 odr_intdup(odr_encode(), Z_PresentStatus_success);
671 new_apdu->u.searchResponse->records = (Z_Records*)
672 odr_malloc(odr_encode(), sizeof(Z_Records));
673 new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
674 new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
675 new_apdu->u.searchResponse->nextResultSetPosition =
676 odr_intdup(odr_encode(), toget+1);
677 send_to_client(new_apdu);
682 yaz_log (LOG_LOG, "%s Optimizing search for small set",
684 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
685 Z_PresentRequest *pr = new_apdu->u.presentRequest;
686 pr->referenceId = sr->referenceId;
687 pr->resultSetId = sr->resultSetName;
688 pr->preferredRecordSyntax = sr->preferredRecordSyntax;
689 *pr->numberOfRecordsRequested = toget;
690 pr->recordComposition = comp;
691 m_client->m_sr_transform = 1;
696 else // query doesn't match
698 delete m_client->m_last_query;
699 m_client->m_last_query = this_query;
700 m_client->m_last_ok = 0;
701 m_client->m_cache.clear();
702 m_client->m_resultSetStartPoint = 0;
704 xfree (m_client->m_last_resultSetId);
705 m_client->m_last_resultSetId = xstrdup (sr->resultSetName);
707 m_client->m_last_databases.set(sr->num_databaseNames,
708 (const char **) sr->databaseNames);
714 void Yaz_Proxy::recv_Z_PDU(Z_APDU *apdu, int len)
719 yaz_log (LOG_LOG, "%s Receiving %s from client %d bytes", m_session_str,
720 apdu_name(apdu), len);
722 if (m_bw_hold_PDU) // double incoming PDU. shutdown now.
725 m_bw_stat.add_bytes(len);
726 m_pdu_stat.add_bytes(1);
728 int bw_total = m_bw_stat.get_total();
729 int pdu_total = m_pdu_stat.get_total();
731 yaz_log(LOG_LOG, "%s stat bw=%d pdu=%d limit-bw=%d limit-pdu=%d",
732 m_session_str, bw_total, pdu_total, m_bw_max, m_pdu_max);
735 if (bw_total > m_bw_max)
737 reduce = (bw_total/m_bw_max);
742 if (pdu_total > m_pdu_max)
744 int nreduce = (60/m_pdu_max);
745 reduce = (reduce > nreduce) ? reduce : nreduce;
750 yaz_log(LOG_LOG, "%s Limit delay=%d", m_session_str, reduce);
751 m_bw_hold_PDU = apdu; // save PDU and signal "on hold"
752 timeout(reduce); // call us reduce seconds later
755 recv_Z_PDU_0(apdu); // all fine. Proceed receive PDU as usual
758 void Yaz_Proxy::handle_max_record_retrieve(Z_APDU *apdu)
760 if (m_max_record_retrieve)
762 if (apdu->which == Z_APDU_presentRequest)
764 Z_PresentRequest *pr = apdu->u.presentRequest;
765 if (pr->numberOfRecordsRequested &&
766 *pr->numberOfRecordsRequested > m_max_record_retrieve)
767 *pr->numberOfRecordsRequested = m_max_record_retrieve;
772 Z_Records *Yaz_Proxy::create_nonSurrogateDiagnostics(ODR odr,
776 Z_Records *rec = (Z_Records *)
777 odr_malloc (odr, sizeof(*rec));
779 odr_malloc (odr, sizeof(*err));
780 Z_DiagRec *drec = (Z_DiagRec *)
781 odr_malloc (odr, sizeof(*drec));
782 Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
783 odr_malloc (odr, sizeof(*dr));
785 rec->which = Z_Records_NSD;
786 rec->u.nonSurrogateDiagnostic = dr;
787 dr->diagnosticSetId =
788 yaz_oidval_to_z3950oid (odr, CLASS_DIAGSET, VAL_BIB1);
790 dr->which = Z_DefaultDiagFormat_v2Addinfo;
791 dr->u.v2Addinfo = odr_strdup (odr, addinfo ? addinfo : "");
795 Z_APDU *Yaz_Proxy::handle_query_validation(Z_APDU *apdu)
797 if (apdu->which == Z_APDU_searchRequest)
799 Z_SearchRequest *sr = apdu->u.searchRequest;
802 err = m_config.check_query(odr_encode(), m_default_target, sr->query,
806 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
808 new_apdu->u.searchResponse->referenceId = sr->referenceId;
809 new_apdu->u.searchResponse->records =
810 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
811 *new_apdu->u.searchResponse->searchStatus = 0;
813 send_to_client(new_apdu);
821 Z_APDU *Yaz_Proxy::handle_syntax_validation(Z_APDU *apdu)
823 if (apdu->which == Z_APDU_searchRequest)
825 Z_SearchRequest *sr = apdu->u.searchRequest;
826 if (*sr->smallSetUpperBound > 0 || *sr->largeSetLowerBound > 1)
830 err = m_config.check_syntax(odr_encode(), m_default_target,
831 sr->preferredRecordSyntax,
835 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
837 new_apdu->u.searchResponse->referenceId = sr->referenceId;
838 new_apdu->u.searchResponse->records =
839 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
840 *new_apdu->u.searchResponse->searchStatus = 0;
842 send_to_client(new_apdu);
848 else if (apdu->which == Z_APDU_presentRequest)
850 Z_PresentRequest *pr = apdu->u.presentRequest;
853 err = m_config.check_syntax(odr_encode(), m_default_target,
854 pr->preferredRecordSyntax,
858 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
860 new_apdu->u.presentResponse->referenceId = pr->referenceId;
861 new_apdu->u.presentResponse->records =
862 create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
863 *new_apdu->u.presentResponse->presentStatus =
864 Z_PresentStatus_failure;
866 send_to_client(new_apdu);
874 void Yaz_Proxy::recv_Z_PDU_0(Z_APDU *apdu)
876 // Determine our client.
877 m_client = get_client(apdu);
883 m_client->m_server = this;
885 if (apdu->which == Z_APDU_initRequest)
887 if (apdu->u.initRequest->implementationId)
888 yaz_log(LOG_LOG, "%s implementationId: %s",
889 m_session_str, apdu->u.initRequest->implementationId);
890 if (apdu->u.initRequest->implementationName)
891 yaz_log(LOG_LOG, "%s implementationName: %s",
892 m_session_str, apdu->u.initRequest->implementationName);
893 if (apdu->u.initRequest->implementationVersion)
894 yaz_log(LOG_LOG, "%s implementationVersion: %s",
895 m_session_str, apdu->u.initRequest->implementationVersion);
896 if (m_client->m_init_flag)
898 Z_APDU *apdu = m_client->m_initResponse;
899 apdu->u.initResponse->otherInfo = 0;
900 if (m_client->m_cookie && *m_client->m_cookie)
901 set_otherInformationString(apdu, VAL_COOKIE, 1,
903 send_to_client(apdu);
906 m_client->m_init_flag = 1;
908 handle_max_record_retrieve(apdu);
911 apdu = handle_syntax_validation(apdu);
914 apdu = handle_query_validation(apdu);
917 apdu = result_set_optimize(apdu);
920 m_client->timeout(m_target_idletime); // mark it active even
921 // though we didn't use it
925 // delete other info part from PDU before sending to target
926 Z_OtherInformation **oi;
927 get_otherInfoAPDU(apdu, &oi);
931 if (apdu->which == Z_APDU_presentRequest &&
932 m_client->m_resultSetStartPoint == 0)
934 Z_PresentRequest *pr = apdu->u.presentRequest;
935 m_client->m_resultSetStartPoint = *pr->resultSetStartPoint;
936 m_client->m_cache.copy_presentRequest(apdu->u.presentRequest);
938 m_client->m_resultSetStartPoint = 0;
940 if (m_client->send_to_target(apdu) < 0)
947 m_client->m_waiting = 1;
950 void Yaz_Proxy::connectNotify()
954 void Yaz_Proxy::shutdown()
956 // only keep if keep_alive flag is set...
957 if (m_keepalive && m_client && m_client->m_waiting == 0)
959 yaz_log (LOG_LOG, "%s Shutdown (client to proxy) keepalive %s",
961 m_client->get_hostname());
962 assert (m_client->m_waiting != 2);
963 // Tell client (if any) that no server connection is there..
964 m_client->m_server = 0;
968 yaz_log (LOG_LOG, "%s Shutdown (client to proxy) close %s",
970 m_client->get_hostname());
971 assert (m_client->m_waiting != 2);
976 yaz_log (LOG_LOG, "%s shutdown (client to proxy) bad state",
982 yaz_log (LOG_LOG, "%s Shutdown (client to proxy)",
988 const char *Yaz_ProxyClient::get_session_str()
992 return m_server->get_session_str();
995 void Yaz_ProxyClient::shutdown()
997 yaz_log (LOG_LOG, "%s Shutdown (proxy to target) %s", get_session_str(),
1003 void Yaz_Proxy::failNotify()
1005 yaz_log (LOG_LOG, "%s Connection closed by client",
1010 void Yaz_ProxyClient::failNotify()
1012 yaz_log (LOG_LOG, "%s Connection closed by target %s",
1013 get_session_str(), get_hostname());
1017 void Yaz_ProxyClient::connectNotify()
1019 yaz_log (LOG_LOG, "%s Connection accepted by %s", get_session_str(),
1023 to = m_server->get_target_idletime();
1029 IYaz_PDU_Observer *Yaz_ProxyClient::sessionNotify(IYaz_PDU_Observable
1030 *the_PDU_Observable, int fd)
1032 return new Yaz_ProxyClient(the_PDU_Observable);
1035 Yaz_ProxyClient::~Yaz_ProxyClient()
1040 m_next->m_prev = m_prev;
1041 m_waiting = 2; // for debugging purposes only.
1042 odr_destroy(m_init_odr);
1043 delete m_last_query;
1044 xfree (m_last_resultSetId);
1048 void Yaz_Proxy::timeoutNotify()
1052 timeout(m_client_idletime);
1053 Z_APDU *apdu = m_bw_hold_PDU;
1059 yaz_log (LOG_LOG, "%s Timeout (client to proxy)", m_session_str);
1064 void Yaz_ProxyClient::timeoutNotify()
1066 yaz_log (LOG_LOG, "%s Timeout (proxy to target) %s", get_session_str(),
1071 Yaz_ProxyClient::Yaz_ProxyClient(IYaz_PDU_Observable *the_PDU_Observable) :
1072 Yaz_Z_Assoc (the_PDU_Observable)
1079 m_last_resultSetId = 0;
1080 m_last_resultCount = 0;
1084 m_init_odr = odr_createmem (ODR_DECODE);
1086 m_resultSetStartPoint = 0;
1087 m_bytes_sent = m_bytes_recv = 0;
1090 const char *Yaz_Proxy::option(const char *name, const char *value)
1092 if (!strcmp (name, "optimize")) {
1095 m_optimize = xstrdup (value);
1102 void Yaz_ProxyClient::recv_Z_PDU(Z_APDU *apdu, int len)
1104 m_bytes_recv += len;
1106 yaz_log (LOG_LOG, "%s Receiving %s from %s %d bytes", get_session_str(),
1107 apdu_name(apdu), get_hostname(), len);
1108 if (apdu->which == Z_APDU_initResponse)
1110 NMEM nmem = odr_extract_mem (odr_decode());
1111 odr_reset (m_init_odr);
1112 nmem_transfer (m_init_odr->mem, nmem);
1113 m_initResponse = apdu;
1115 Z_InitResponse *ir = apdu->u.initResponse;
1116 char *im0 = ir->implementationName;
1119 odr_malloc(m_init_odr, 20 + (im0 ? strlen(im0) : 0));
1126 strcat(im1, "(YAZ Proxy)");
1127 ir->implementationName = im1;
1129 nmem_destroy (nmem);
1131 if (apdu->which == Z_APDU_searchResponse)
1133 Z_SearchResponse *sr = apdu->u.searchResponse;
1134 m_last_resultCount = *sr->resultCount;
1135 int status = *sr->searchStatus;
1136 if (status && (!sr->records || sr->records->which == Z_Records_DBOSD))
1140 if (sr->records && sr->records->which == Z_Records_DBOSD)
1142 m_cache.add(odr_decode(),
1143 sr->records->u.databaseOrSurDiagnostics, 1,
1148 if (apdu->which == Z_APDU_presentResponse)
1150 Z_PresentResponse *pr = apdu->u.presentResponse;
1154 Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
1155 Z_SearchResponse *sr = new_apdu->u.searchResponse;
1156 sr->referenceId = pr->referenceId;
1157 *sr->resultCount = m_last_resultCount;
1158 sr->records = pr->records;
1159 sr->nextResultSetPosition = pr->nextResultSetPosition;
1160 sr->numberOfRecordsReturned = pr->numberOfRecordsReturned;
1164 pr->records->which == Z_Records_DBOSD && m_resultSetStartPoint)
1166 m_cache.add(odr_decode(),
1167 pr->records->u.databaseOrSurDiagnostics,
1168 m_resultSetStartPoint, -1);
1169 m_resultSetStartPoint = 0;
1173 set_otherInformationString (apdu, VAL_COOKIE, 1, m_cookie);
1176 m_server->send_to_client(apdu);
1178 if (apdu->which == Z_APDU_close)