1 /* This file is part of Pazpar2.
2 Copyright (C) 2006-2010 Index Data
4 Pazpar2 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 Pazpar2 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
40 #include <yaz/marcdisp.h>
41 #include <yaz/comstack.h>
42 #include <yaz/tcpip.h>
43 #include <yaz/proto.h>
44 #include <yaz/readconf.h>
45 #include <yaz/pquery.h>
46 #include <yaz/otherinfo.h>
47 #include <yaz/yaz-util.h>
49 #include <yaz/query-charset.h>
50 #include <yaz/querytowrbuf.h>
51 #include <yaz/oid_db.h>
52 #include <yaz/diagbib1.h>
53 #include <yaz/snprintf.h>
54 #include <yaz/rpn2cql.h>
58 #include <yaz/timing.h>
63 #include "parameters.h"
65 #include "connection.h"
67 #include "relevance.h"
70 /* client counting (1) , disable client counting (0) */
72 static YAZ_MUTEX g_mutex = 0;
73 static int no_clients = 0;
75 static void client_use(int delta)
78 yaz_mutex_create(&g_mutex);
79 yaz_mutex_enter(g_mutex);
81 yaz_mutex_leave(g_mutex);
82 yaz_log(YLOG_LOG, "%s clients=%d", delta > 0 ? "INC" : "DEC", no_clients);
88 /** \brief Represents client state for a connection to one search target */
90 struct session_database *database;
91 struct connection *connection;
92 struct session *session;
93 char *pquery; // Current search
94 char *cqlquery; // used for SRU targets only
100 enum client_state state;
101 struct show_raw *show_raw;
102 ZOOM_resultset resultset;
108 int active; // whether this request has been sent to the server
113 void (*error_handler)(void *data, const char *addinfo);
114 void (*record_handler)(void *data, const char *buf, size_t sz);
116 struct show_raw *next;
119 static const char *client_states[] = {
125 "Client_Disconnected"
128 const char *client_get_state_str(struct client *cl)
130 return client_states[cl->state];
133 enum client_state client_get_state(struct client *cl)
138 void client_set_state(struct client *cl, enum client_state st)
141 /* no need to check for all client being non-active if this one
142 already is. Note that session_active_clients also LOCKS session */
144 if (!client_is_active(cl) && cl->session)
146 int no_active = session_active_clients(cl->session);
148 session_alert_watch(cl->session, SESSION_WATCH_SHOW);
153 static void client_show_raw_error(struct client *cl, const char *addinfo);
155 struct connection *client_get_connection(struct client *cl)
157 return cl->connection;
160 struct session_database *client_get_database(struct client *cl)
165 struct session *client_get_session(struct client *cl)
170 const char *client_get_pquery(struct client *cl)
175 static void client_send_raw_present(struct client *cl);
176 static int nativesyntax_to_type(struct session_database *sdb, char *type,
179 static void client_show_immediate(
180 ZOOM_resultset resultset, struct session_database *sdb, int position,
182 void (*error_handler)(void *data, const char *addinfo),
183 void (*record_handler)(void *data, const char *buf, size_t sz),
193 error_handler(data, "no resultset");
196 rec = ZOOM_resultset_record(resultset, position-1);
199 error_handler(data, "no record");
205 nativesyntax_to_type(sdb, type, rec);
206 buf = ZOOM_record_get(rec, type, &len);
209 error_handler(data, "no record");
212 record_handler(data, buf, len);
216 int client_show_raw_begin(struct client *cl, int position,
217 const char *syntax, const char *esn,
219 void (*error_handler)(void *data, const char *addinfo),
220 void (*record_handler)(void *data, const char *buf,
224 if (syntax == 0 && esn == 0)
225 client_show_immediate(cl->resultset, client_get_database(cl),
227 error_handler, record_handler,
231 struct show_raw *rr, **rrp;
237 rr = xmalloc(sizeof(*rr));
238 rr->position = position;
241 rr->error_handler = error_handler;
242 rr->record_handler = record_handler;
245 rr->syntax = xstrdup(syntax);
249 rr->esn = xstrdup(esn);
254 for (rrp = &cl->show_raw; *rrp; rrp = &(*rrp)->next)
258 if (cl->state == Client_Failed)
260 client_show_raw_error(cl, "client failed");
262 else if (cl->state == Client_Disconnected)
264 client_show_raw_error(cl, "client disconnected");
268 client_send_raw_present(cl);
274 static void client_show_raw_delete(struct show_raw *r)
281 void client_show_raw_remove(struct client *cl, void *data)
283 struct show_raw *rr = data;
284 struct show_raw **rrp = &cl->show_raw;
290 client_show_raw_delete(rr);
294 void client_show_raw_dequeue(struct client *cl)
296 struct show_raw *rr = cl->show_raw;
298 cl->show_raw = rr->next;
299 client_show_raw_delete(rr);
302 static void client_show_raw_error(struct client *cl, const char *addinfo)
306 cl->show_raw->error_handler(cl->show_raw->data, addinfo);
307 client_show_raw_dequeue(cl);
311 static void client_send_raw_present(struct client *cl)
313 struct session_database *sdb = client_get_database(cl);
314 struct connection *co = client_get_connection(cl);
315 ZOOM_resultset set = cl->resultset;
317 int offset = cl->show_raw->position;
318 const char *syntax = 0;
319 const char *elements = 0;
321 assert(cl->show_raw);
324 yaz_log(YLOG_DEBUG, "%s: trying to present %d record(s) from %d",
325 client_get_url(cl), 1, offset);
327 if (cl->show_raw->syntax)
328 syntax = cl->show_raw->syntax;
330 syntax = session_setting_oneval(sdb, PZ_REQUESTSYNTAX);
331 ZOOM_resultset_option_set(set, "preferredRecordSyntax", syntax);
333 if (cl->show_raw->esn)
334 elements = cl->show_raw->esn;
336 elements = session_setting_oneval(sdb, PZ_ELEMENTS);
337 if (elements && *elements)
338 ZOOM_resultset_option_set(set, "elementSetName", elements);
340 ZOOM_resultset_records(set, 0, offset-1, 1);
341 cl->show_raw->active = 1;
343 connection_continue(co);
346 static int nativesyntax_to_type(struct session_database *sdb, char *type,
349 const char *s = session_setting_oneval(sdb, PZ_NATIVESYNTAX);
353 if (!strncmp(s, "iso2709", 7))
355 const char *cp = strchr(s, ';');
356 yaz_snprintf(type, 80, "xml; charset=%s", cp ? cp+1 : "marc-8s");
358 else if (!strncmp(s, "xml", 3))
362 else if (!strncmp(s, "txml", 4))
364 const char *cp = strchr(s, ';');
365 yaz_snprintf(type, 80, "txml; charset=%s", cp ? cp+1 : "marc-8s");
371 else /* attempt to deduce structure */
373 const char *syntax = ZOOM_record_get(rec, "syntax", NULL);
376 if (!strcmp(syntax, "XML"))
381 else if (!strcmp(syntax, "TXML"))
383 strcpy(type, "txml");
386 else if (!strcmp(syntax, "USmarc") || !strcmp(syntax, "MARC21"))
388 strcpy(type, "xml; charset=marc8-s");
397 static void ingest_raw_record(struct client *cl, ZOOM_record rec)
403 if (cl->show_raw->binary)
407 struct session_database *sdb = client_get_database(cl);
408 nativesyntax_to_type(sdb, type, rec);
411 buf = ZOOM_record_get(rec, type, &len);
412 cl->show_raw->record_handler(cl->show_raw->data, buf, len);
413 client_show_raw_dequeue(cl);
416 void client_search_response(struct client *cl)
418 struct connection *co = cl->connection;
419 struct session *se = cl->session;
420 ZOOM_connection link = connection_get_link(co);
421 ZOOM_resultset resultset = cl->resultset;
422 const char *error, *addinfo = 0;
424 if (ZOOM_connection_error(link, &error, &addinfo))
427 client_set_state(cl, Client_Error);
428 yaz_log(YLOG_WARN, "Search error %s (%s): %s",
429 error, addinfo, client_get_url(cl));
433 cl->record_offset = cl->startrecs;
434 cl->hits = ZOOM_resultset_size(resultset);
436 se->total_hits += cl->hits;
440 void client_got_records(struct client *cl)
442 struct session *se = cl->session;
446 session_alert_watch(se, SESSION_WATCH_SHOW);
447 session_alert_watch(se, SESSION_WATCH_RECORD);
452 void client_record_response(struct client *cl)
454 struct connection *co = cl->connection;
455 ZOOM_connection link = connection_get_link(co);
456 ZOOM_resultset resultset = cl->resultset;
457 const char *error, *addinfo;
459 if (ZOOM_connection_error(link, &error, &addinfo))
461 client_set_state(cl, Client_Error);
462 yaz_log(YLOG_WARN, "Search error %s (%s): %s",
463 error, addinfo, client_get_url(cl));
468 const char *msg, *addinfo;
470 if (cl->show_raw && cl->show_raw->active)
472 if ((rec = ZOOM_resultset_record(resultset,
473 cl->show_raw->position-1)))
475 cl->show_raw->active = 0;
476 ingest_raw_record(cl, rec);
480 yaz_log(YLOG_WARN, "Expected record, but got NULL, offset=%d",
481 cl->show_raw->position-1);
486 int offset = cl->record_offset;
487 if ((rec = ZOOM_resultset_record(resultset, offset)))
490 if (cl->session == 0)
492 else if (ZOOM_record_error(rec, &msg, &addinfo, 0))
494 yaz_log(YLOG_WARN, "Record error %s (%s): %s (rec #%d)",
495 msg, addinfo, client_get_url(cl),
500 struct session_database *sdb = client_get_database(cl);
501 NMEM nmem = nmem_create();
505 if (nativesyntax_to_type(sdb, type, rec))
506 yaz_log(YLOG_WARN, "Failed to determine record type");
507 xmlrec = ZOOM_record_get(rec, type, NULL);
509 yaz_log(YLOG_WARN, "ZOOM_record_get failed from %s",
513 if (ingest_record(cl, xmlrec, cl->record_offset, nmem))
514 yaz_log(YLOG_WARN, "Failed to ingest from %s",
522 yaz_log(YLOG_WARN, "Expected record, but got NULL, offset=%d",
529 void client_start_search(struct client *cl)
531 struct session_database *sdb = client_get_database(cl);
532 struct connection *co = client_get_connection(cl);
533 ZOOM_connection link = connection_get_link(co);
535 char *databaseName = sdb->database->databases[0];
536 const char *opt_piggyback = session_setting_oneval(sdb, PZ_PIGGYBACK);
537 const char *opt_queryenc = session_setting_oneval(sdb, PZ_QUERYENCODING);
538 const char *opt_elements = session_setting_oneval(sdb, PZ_ELEMENTS);
539 const char *opt_requestsyn = session_setting_oneval(sdb, PZ_REQUESTSYNTAX);
540 const char *opt_maxrecs = session_setting_oneval(sdb, PZ_MAXRECS);
541 const char *opt_sru = session_setting_oneval(sdb, PZ_SRU);
542 const char *opt_sort = session_setting_oneval(sdb, PZ_SORT);
543 char maxrecs_str[24], startrecs_str[24];
548 cl->record_offset = 0;
550 client_set_state(cl, Client_Working);
553 ZOOM_connection_option_set(link, "piggyback", opt_piggyback);
555 ZOOM_connection_option_set(link, "piggyback", "1");
557 ZOOM_connection_option_set(link, "rpnCharset", opt_queryenc);
558 if (*opt_sru && *opt_elements)
559 ZOOM_connection_option_set(link, "schema", opt_elements);
560 else if (*opt_elements)
561 ZOOM_connection_option_set(link, "elementSetName", opt_elements);
563 ZOOM_connection_option_set(link, "preferredRecordSyntax", opt_requestsyn);
567 sprintf(maxrecs_str, "%d", cl->maxrecs);
568 opt_maxrecs = maxrecs_str;
570 ZOOM_connection_option_set(link, "count", opt_maxrecs);
573 if (atoi(opt_maxrecs) > 20)
574 ZOOM_connection_option_set(link, "presentChunk", "20");
576 ZOOM_connection_option_set(link, "presentChunk", opt_maxrecs);
578 sprintf(startrecs_str, "%d", cl->startrecs);
579 ZOOM_connection_option_set(link, "start", startrecs_str);
582 ZOOM_connection_option_set(link, "databaseName", databaseName);
586 ZOOM_query q = ZOOM_query_create();
587 yaz_log(YLOG_LOG, "Search %s CQL: %s", sdb->database->url, cl->cqlquery);
588 ZOOM_query_cql(q, cl->cqlquery);
590 ZOOM_query_sortby(q, opt_sort);
591 rs = ZOOM_connection_search(link, q);
592 ZOOM_query_destroy(q);
596 yaz_log(YLOG_LOG, "Search %s PQF: %s", sdb->database->url, cl->pquery);
597 rs = ZOOM_connection_search_pqf(link, cl->pquery);
599 ZOOM_resultset_destroy(cl->resultset);
601 connection_continue(co);
604 struct client *client_create(void)
606 struct client *r = xmalloc(sizeof(*r));
615 r->record_offset = 0;
617 r->state = Client_Disconnected;
621 pazpar2_mutex_create(&r->mutex, "client");
629 void client_lock(struct client *c)
631 yaz_mutex_enter(c->mutex);
634 void client_unlock(struct client *c)
636 yaz_mutex_leave(c->mutex);
639 void client_incref(struct client *c)
641 pazpar2_incref(&c->ref_count, c->mutex);
642 yaz_log(YLOG_LOG, "client_incref c=%p %s cnt=%d",
643 c, client_get_url(c), c->ref_count);
646 int client_destroy(struct client *c)
650 yaz_log(YLOG_LOG, "client_destroy c=%p %s cnt=%d",
651 c, client_get_url(c), c->ref_count);
652 if (!pazpar2_decref(&c->ref_count, c->mutex))
658 assert(!c->connection);
659 assert(!c->resultset);
661 yaz_mutex_destroy(&c->mutex);
670 void client_set_connection(struct client *cl, struct connection *con)
674 ZOOM_resultset_destroy(cl->resultset);
679 assert(cl->connection == 0);
680 cl->connection = con;
685 cl->connection = con;
690 void client_disconnect(struct client *cl)
692 if (cl->state != Client_Idle)
693 client_set_state(cl, Client_Disconnected);
694 client_set_connection(cl, 0);
697 // Extract terms from query into null-terminated termlist
698 static void extract_terms(NMEM nmem, struct ccl_rpn_node *query, char **termlist)
702 pull_terms(nmem, query, termlist, &num);
706 // Initialize CCL map for a target
707 static CCL_bibset prepare_cclmap(struct client *cl)
709 struct session_database *sdb = client_get_database(cl);
716 for (s = sdb->settings[PZ_CCLMAP]; s; s = s->next)
718 char *p = strchr(s->name + 3, ':');
721 yaz_log(YLOG_WARN, "Malformed cclmap name: %s", s->name);
726 ccl_qual_fitem(res, s->value, p);
731 // returns a xmalloced CQL query corresponding to the pquery in client
732 static char *make_cqlquery(struct client *cl)
734 cql_transform_t cqlt = cql_transform_create();
737 WRBUF wrb = wrbuf_alloc();
739 ODR odr_out = odr_createmem(ODR_ENCODE);
741 zquery = p_query_rpn(odr_out, cl->pquery);
742 yaz_log(YLOG_LOG, "PQF: %s", cl->pquery);
743 if ((status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery)))
745 yaz_log(YLOG_WARN, "Failed to generate CQL query, code=%d", status);
750 r = xstrdup(wrbuf_cstr(wrb));
753 odr_destroy(odr_out);
754 cql_transform_close(cqlt);
758 // Parse the query given the settings specific to this client
759 int client_parse_query(struct client *cl, const char *query)
761 struct session *se = client_get_session(cl);
762 struct session_database *sdb = client_get_database(cl);
763 struct ccl_rpn_node *cn;
765 CCL_bibset ccl_map = prepare_cclmap(cl);
766 const char *sru = session_setting_oneval(sdb, PZ_SRU);
767 const char *pqf_prefix = session_setting_oneval(sdb, PZ_PQF_PREFIX);
768 const char *pqf_strftime = session_setting_oneval(sdb, PZ_PQF_STRFTIME);
773 cn = ccl_find_str(ccl_map, query, &cerror, &cpos);
774 ccl_qual_rm(&ccl_map);
777 client_set_state(cl, Client_Error);
778 yaz_log(YLOG_WARN, "Failed to parse CCL query %s for %s",
780 client_get_database(cl)->database->url);
783 wrbuf_rewind(se->wrbuf);
786 wrbuf_puts(se->wrbuf, pqf_prefix);
787 wrbuf_puts(se->wrbuf, " ");
789 if (!pqf_strftime || !*pqf_strftime)
790 ccl_pquery(se->wrbuf, cn);
793 time_t cur_time = time(0);
794 struct tm *tm = localtime(&cur_time);
796 const char *cp = tmp_str;
798 /* see man strftime(3) for things .. In particular %% gets converted
799 to %.. And That's our original query .. */
800 strftime(tmp_str, sizeof(tmp_str)-1, pqf_strftime, tm);
804 ccl_pquery(se->wrbuf, cn);
806 wrbuf_putc(se->wrbuf, cp[0]);
810 cl->pquery = xstrdup(wrbuf_cstr(se->wrbuf));
815 if (!(cl->cqlquery = make_cqlquery(cl)))
823 // Initialize relevance structure with query terms
825 extract_terms(se->nmem, cn, p);
826 se->relevance = relevance_create(
827 se->service->relevance_pct,
828 se->nmem, (const char **) p);
835 void client_set_session(struct client *cl, struct session *se)
840 int client_is_active(struct client *cl)
842 if (cl->connection && (cl->state == Client_Connecting ||
843 cl->state == Client_Working))
848 Odr_int client_get_hits(struct client *cl)
853 int client_get_num_records(struct client *cl)
855 return cl->record_offset;
858 void client_set_diagnostic(struct client *cl, int diagnostic)
860 cl->diagnostic = diagnostic;
863 int client_get_diagnostic(struct client *cl)
865 return cl->diagnostic;
868 void client_set_database(struct client *cl, struct session_database *db)
873 struct host *client_get_host(struct client *cl)
875 return client_get_database(cl)->database->host;
878 const char *client_get_url(struct client *cl)
881 return client_get_database(cl)->database->url;
886 void client_set_maxrecs(struct client *cl, int v)
891 void client_set_startrecs(struct client *cl, int v)
899 * c-file-style: "Stroustrup"
900 * indent-tabs-mode: nil
902 * vim: shiftwidth=4 tabstop=8 expandtab