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
39 #include <yaz/marcdisp.h>
40 #include <yaz/comstack.h>
41 #include <yaz/tcpip.h>
42 #include <yaz/proto.h>
43 #include <yaz/readconf.h>
44 #include <yaz/pquery.h>
45 #include <yaz/otherinfo.h>
46 #include <yaz/yaz-util.h>
48 #include <yaz/query-charset.h>
49 #include <yaz/querytowrbuf.h>
50 #include <yaz/oid_db.h>
51 #include <yaz/diagbib1.h>
52 #include <yaz/snprintf.h>
53 #include <yaz/rpn2cql.h>
57 #include <yaz/timing.h>
62 #include "parameters.h"
64 #include "connection.h"
66 #include "relevance.h"
69 /* client counting (1) , disable client counting (0) */
71 static YAZ_MUTEX g_mutex = 0;
72 static int no_clients = 0;
74 static void client_use(int delta)
77 yaz_mutex_create(&g_mutex);
78 yaz_mutex_enter(g_mutex);
80 yaz_mutex_leave(g_mutex);
81 yaz_log(YLOG_DEBUG, "%s clients=%d", delta > 0 ? "INC" : "DEC", no_clients);
87 /** \brief Represents client state for a connection to one search target */
89 struct session_database *database;
90 struct connection *connection;
91 struct session *session;
92 char *pquery; // Current search
93 char *cqlquery; // used for SRU targets only
99 enum client_state state;
100 struct show_raw *show_raw;
101 ZOOM_resultset resultset;
107 int active; // whether this request has been sent to the server
112 void (*error_handler)(void *data, const char *addinfo);
113 void (*record_handler)(void *data, const char *buf, size_t sz);
115 struct show_raw *next;
118 static const char *client_states[] = {
124 "Client_Disconnected"
127 const char *client_get_state_str(struct client *cl)
129 return client_states[cl->state];
132 enum client_state client_get_state(struct client *cl)
137 void client_set_state(struct client *cl, enum client_state st)
140 /* no need to check for all client being non-active if this one
141 already is. Note that session_active_clients also LOCKS session */
142 if (!client_is_active(cl) && cl->session)
144 int no_active = session_active_clients(cl->session);
146 session_alert_watch(cl->session, SESSION_WATCH_SHOW);
150 static void client_show_raw_error(struct client *cl, const char *addinfo);
152 struct connection *client_get_connection(struct client *cl)
154 return cl->connection;
157 struct session_database *client_get_database(struct client *cl)
162 struct session *client_get_session(struct client *cl)
167 const char *client_get_pquery(struct client *cl)
172 static void client_send_raw_present(struct client *cl);
173 static int nativesyntax_to_type(struct session_database *sdb, char *type,
176 static void client_show_immediate(
177 ZOOM_resultset resultset, struct session_database *sdb, int position,
179 void (*error_handler)(void *data, const char *addinfo),
180 void (*record_handler)(void *data, const char *buf, size_t sz),
190 error_handler(data, "no resultset");
193 rec = ZOOM_resultset_record(resultset, position-1);
196 error_handler(data, "no record");
202 nativesyntax_to_type(sdb, type, rec);
203 buf = ZOOM_record_get(rec, type, &len);
206 error_handler(data, "no record");
209 record_handler(data, buf, len);
213 int client_show_raw_begin(struct client *cl, int position,
214 const char *syntax, const char *esn,
216 void (*error_handler)(void *data, const char *addinfo),
217 void (*record_handler)(void *data, const char *buf,
221 if (syntax == 0 && esn == 0)
222 client_show_immediate(cl->resultset, client_get_database(cl),
224 error_handler, record_handler,
228 struct show_raw *rr, **rrp;
234 rr = xmalloc(sizeof(*rr));
235 rr->position = position;
238 rr->error_handler = error_handler;
239 rr->record_handler = record_handler;
242 rr->syntax = xstrdup(syntax);
246 rr->esn = xstrdup(esn);
251 for (rrp = &cl->show_raw; *rrp; rrp = &(*rrp)->next)
255 if (cl->state == Client_Failed)
257 client_show_raw_error(cl, "client failed");
259 else if (cl->state == Client_Disconnected)
261 client_show_raw_error(cl, "client disconnected");
265 client_send_raw_present(cl);
271 static void client_show_raw_delete(struct show_raw *r)
278 void client_show_raw_remove(struct client *cl, void *data)
280 struct show_raw *rr = data;
281 struct show_raw **rrp = &cl->show_raw;
287 client_show_raw_delete(rr);
291 void client_show_raw_dequeue(struct client *cl)
293 struct show_raw *rr = cl->show_raw;
295 cl->show_raw = rr->next;
296 client_show_raw_delete(rr);
299 static void client_show_raw_error(struct client *cl, const char *addinfo)
303 cl->show_raw->error_handler(cl->show_raw->data, addinfo);
304 client_show_raw_dequeue(cl);
308 static void client_send_raw_present(struct client *cl)
310 struct session_database *sdb = client_get_database(cl);
311 struct connection *co = client_get_connection(cl);
312 ZOOM_resultset set = cl->resultset;
314 int offset = cl->show_raw->position;
315 const char *syntax = 0;
316 const char *elements = 0;
318 assert(cl->show_raw);
321 yaz_log(YLOG_DEBUG, "%s: trying to present %d record(s) from %d",
322 client_get_url(cl), 1, offset);
324 if (cl->show_raw->syntax)
325 syntax = cl->show_raw->syntax;
327 syntax = session_setting_oneval(sdb, PZ_REQUESTSYNTAX);
328 ZOOM_resultset_option_set(set, "preferredRecordSyntax", syntax);
330 if (cl->show_raw->esn)
331 elements = cl->show_raw->esn;
333 elements = session_setting_oneval(sdb, PZ_ELEMENTS);
334 if (elements && *elements)
335 ZOOM_resultset_option_set(set, "elementSetName", elements);
337 ZOOM_resultset_records(set, 0, offset-1, 1);
338 cl->show_raw->active = 1;
340 connection_continue(co);
343 static int nativesyntax_to_type(struct session_database *sdb, char *type,
346 const char *s = session_setting_oneval(sdb, PZ_NATIVESYNTAX);
350 if (!strncmp(s, "iso2709", 7))
352 const char *cp = strchr(s, ';');
353 yaz_snprintf(type, 80, "xml; charset=%s", cp ? cp+1 : "marc-8s");
355 else if (!strncmp(s, "xml", 3))
359 else if (!strncmp(s, "txml", 4))
361 const char *cp = strchr(s, ';');
362 yaz_snprintf(type, 80, "txml; charset=%s", cp ? cp+1 : "marc-8s");
368 else /* attempt to deduce structure */
370 const char *syntax = ZOOM_record_get(rec, "syntax", NULL);
373 if (!strcmp(syntax, "XML"))
378 else if (!strcmp(syntax, "TXML"))
380 strcpy(type, "txml");
383 else if (!strcmp(syntax, "USmarc") || !strcmp(syntax, "MARC21"))
385 strcpy(type, "xml; charset=marc8-s");
394 static void ingest_raw_record(struct client *cl, ZOOM_record rec)
400 if (cl->show_raw->binary)
404 struct session_database *sdb = client_get_database(cl);
405 nativesyntax_to_type(sdb, type, rec);
408 buf = ZOOM_record_get(rec, type, &len);
409 cl->show_raw->record_handler(cl->show_raw->data, buf, len);
410 client_show_raw_dequeue(cl);
413 void client_search_response(struct client *cl)
415 struct connection *co = cl->connection;
416 struct session *se = cl->session;
417 ZOOM_connection link = connection_get_link(co);
418 ZOOM_resultset resultset = cl->resultset;
419 const char *error, *addinfo = 0;
421 if (ZOOM_connection_error(link, &error, &addinfo))
424 client_set_state(cl, Client_Error);
425 yaz_log(YLOG_WARN, "Search error %s (%s): %s",
426 error, addinfo, client_get_url(cl));
430 cl->record_offset = cl->startrecs;
431 cl->hits = ZOOM_resultset_size(resultset);
433 se->total_hits += cl->hits;
437 void client_got_records(struct client *cl)
439 struct session *se = cl->session;
443 session_alert_watch(se, SESSION_WATCH_SHOW);
444 session_alert_watch(se, SESSION_WATCH_RECORD);
449 void client_record_response(struct client *cl)
451 struct connection *co = cl->connection;
452 ZOOM_connection link = connection_get_link(co);
453 ZOOM_resultset resultset = cl->resultset;
454 const char *error, *addinfo;
456 if (ZOOM_connection_error(link, &error, &addinfo))
458 client_set_state(cl, Client_Error);
459 yaz_log(YLOG_WARN, "Search error %s (%s): %s",
460 error, addinfo, client_get_url(cl));
465 const char *msg, *addinfo;
467 if (cl->show_raw && cl->show_raw->active)
469 if ((rec = ZOOM_resultset_record(resultset,
470 cl->show_raw->position-1)))
472 cl->show_raw->active = 0;
473 ingest_raw_record(cl, rec);
477 yaz_log(YLOG_WARN, "Expected record, but got NULL, offset=%d",
478 cl->show_raw->position-1);
483 int offset = cl->record_offset;
484 if ((rec = ZOOM_resultset_record(resultset, offset)))
487 if (cl->session == 0)
489 else if (ZOOM_record_error(rec, &msg, &addinfo, 0))
491 yaz_log(YLOG_WARN, "Record error %s (%s): %s (rec #%d)",
492 msg, addinfo, client_get_url(cl),
497 struct session_database *sdb = client_get_database(cl);
498 NMEM nmem = nmem_create();
502 if (nativesyntax_to_type(sdb, type, rec))
503 yaz_log(YLOG_WARN, "Failed to determine record type");
504 xmlrec = ZOOM_record_get(rec, type, NULL);
506 yaz_log(YLOG_WARN, "ZOOM_record_get failed from %s",
510 if (ingest_record(cl, xmlrec, cl->record_offset, nmem))
511 yaz_log(YLOG_WARN, "Failed to ingest from %s",
519 yaz_log(YLOG_WARN, "Expected record, but got NULL, offset=%d",
526 void client_start_search(struct client *cl)
528 struct session_database *sdb = client_get_database(cl);
529 struct connection *co = client_get_connection(cl);
530 ZOOM_connection link = connection_get_link(co);
532 char *databaseName = sdb->database->databases[0];
533 const char *opt_piggyback = session_setting_oneval(sdb, PZ_PIGGYBACK);
534 const char *opt_queryenc = session_setting_oneval(sdb, PZ_QUERYENCODING);
535 const char *opt_elements = session_setting_oneval(sdb, PZ_ELEMENTS);
536 const char *opt_requestsyn = session_setting_oneval(sdb, PZ_REQUESTSYNTAX);
537 const char *opt_maxrecs = session_setting_oneval(sdb, PZ_MAXRECS);
538 const char *opt_sru = session_setting_oneval(sdb, PZ_SRU);
539 const char *opt_sort = session_setting_oneval(sdb, PZ_SORT);
540 char maxrecs_str[24], startrecs_str[24];
545 cl->record_offset = 0;
547 client_set_state(cl, Client_Working);
550 ZOOM_connection_option_set(link, "piggyback", opt_piggyback);
552 ZOOM_connection_option_set(link, "piggyback", "1");
554 ZOOM_connection_option_set(link, "rpnCharset", opt_queryenc);
555 if (*opt_sru && *opt_elements)
556 ZOOM_connection_option_set(link, "schema", opt_elements);
557 else if (*opt_elements)
558 ZOOM_connection_option_set(link, "elementSetName", opt_elements);
560 ZOOM_connection_option_set(link, "preferredRecordSyntax", opt_requestsyn);
564 sprintf(maxrecs_str, "%d", cl->maxrecs);
565 opt_maxrecs = maxrecs_str;
567 ZOOM_connection_option_set(link, "count", opt_maxrecs);
570 if (atoi(opt_maxrecs) > 20)
571 ZOOM_connection_option_set(link, "presentChunk", "20");
573 ZOOM_connection_option_set(link, "presentChunk", opt_maxrecs);
575 sprintf(startrecs_str, "%d", cl->startrecs);
576 ZOOM_connection_option_set(link, "start", startrecs_str);
579 ZOOM_connection_option_set(link, "databaseName", databaseName);
583 ZOOM_query q = ZOOM_query_create();
584 yaz_log(YLOG_LOG, "Search %s CQL: %s", sdb->database->url, cl->cqlquery);
585 ZOOM_query_cql(q, cl->cqlquery);
587 ZOOM_query_sortby(q, opt_sort);
588 rs = ZOOM_connection_search(link, q);
589 ZOOM_query_destroy(q);
593 yaz_log(YLOG_LOG, "Search %s PQF: %s", sdb->database->url, cl->pquery);
594 rs = ZOOM_connection_search_pqf(link, cl->pquery);
596 ZOOM_resultset_destroy(cl->resultset);
598 connection_continue(co);
601 struct client *client_create(void)
603 struct client *r = xmalloc(sizeof(*r));
612 r->record_offset = 0;
614 r->state = Client_Disconnected;
618 pazpar2_mutex_create(&r->mutex, "client");
626 void client_lock(struct client *c)
628 yaz_mutex_enter(c->mutex);
631 void client_unlock(struct client *c)
633 yaz_mutex_leave(c->mutex);
636 void client_incref(struct client *c)
638 pazpar2_incref(&c->ref_count, c->mutex);
639 yaz_log(YLOG_DEBUG, "client_incref c=%p %s cnt=%d",
640 c, client_get_url(c), c->ref_count);
643 int client_destroy(struct client *c)
647 yaz_log(YLOG_DEBUG, "client_destroy c=%p %s cnt=%d",
648 c, client_get_url(c), c->ref_count);
649 if (!pazpar2_decref(&c->ref_count, c->mutex))
655 assert(!c->connection);
659 ZOOM_resultset_destroy(c->resultset);
661 yaz_mutex_destroy(&c->mutex);
670 void client_set_connection(struct client *cl, struct connection *con)
673 ZOOM_resultset_release(cl->resultset);
676 assert(cl->connection == 0);
677 cl->connection = con;
682 cl->connection = con;
687 void client_disconnect(struct client *cl)
689 if (cl->state != Client_Idle)
690 client_set_state(cl, Client_Disconnected);
691 client_set_connection(cl, 0);
694 // Extract terms from query into null-terminated termlist
695 static void extract_terms(NMEM nmem, struct ccl_rpn_node *query, char **termlist)
699 pull_terms(nmem, query, termlist, &num);
703 // Initialize CCL map for a target
704 static CCL_bibset prepare_cclmap(struct client *cl)
706 struct session_database *sdb = client_get_database(cl);
713 for (s = sdb->settings[PZ_CCLMAP]; s; s = s->next)
715 char *p = strchr(s->name + 3, ':');
718 yaz_log(YLOG_WARN, "Malformed cclmap name: %s", s->name);
723 ccl_qual_fitem(res, s->value, p);
728 // returns a xmalloced CQL query corresponding to the pquery in client
729 static char *make_cqlquery(struct client *cl)
731 cql_transform_t cqlt = cql_transform_create();
734 WRBUF wrb = wrbuf_alloc();
736 ODR odr_out = odr_createmem(ODR_ENCODE);
738 zquery = p_query_rpn(odr_out, cl->pquery);
739 yaz_log(YLOG_LOG, "PQF: %s", cl->pquery);
740 if ((status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery)))
742 yaz_log(YLOG_WARN, "Failed to generate CQL query, code=%d", status);
747 r = xstrdup(wrbuf_cstr(wrb));
750 odr_destroy(odr_out);
751 cql_transform_close(cqlt);
755 // Parse the query given the settings specific to this client
756 int client_parse_query(struct client *cl, const char *query)
758 struct session *se = client_get_session(cl);
759 struct session_database *sdb = client_get_database(cl);
760 struct ccl_rpn_node *cn;
762 CCL_bibset ccl_map = prepare_cclmap(cl);
763 const char *sru = session_setting_oneval(sdb, PZ_SRU);
764 const char *pqf_prefix = session_setting_oneval(sdb, PZ_PQF_PREFIX);
765 const char *pqf_strftime = session_setting_oneval(sdb, PZ_PQF_STRFTIME);
770 cn = ccl_find_str(ccl_map, query, &cerror, &cpos);
771 ccl_qual_rm(&ccl_map);
774 client_set_state(cl, Client_Error);
775 yaz_log(YLOG_WARN, "Failed to parse CCL query %s for %s",
777 client_get_database(cl)->database->url);
780 wrbuf_rewind(se->wrbuf);
783 wrbuf_puts(se->wrbuf, pqf_prefix);
784 wrbuf_puts(se->wrbuf, " ");
786 if (!pqf_strftime || !*pqf_strftime)
787 ccl_pquery(se->wrbuf, cn);
790 time_t cur_time = time(0);
791 struct tm *tm = localtime(&cur_time);
793 const char *cp = tmp_str;
795 /* see man strftime(3) for things .. In particular %% gets converted
796 to %.. And That's our original query .. */
797 strftime(tmp_str, sizeof(tmp_str)-1, pqf_strftime, tm);
801 ccl_pquery(se->wrbuf, cn);
803 wrbuf_putc(se->wrbuf, cp[0]);
807 cl->pquery = xstrdup(wrbuf_cstr(se->wrbuf));
812 if (!(cl->cqlquery = make_cqlquery(cl)))
820 // Initialize relevance structure with query terms
822 extract_terms(se->nmem, cn, p);
823 se->relevance = relevance_create(
824 se->service->relevance_pct,
825 se->nmem, (const char **) p);
832 void client_set_session(struct client *cl, struct session *se)
837 int client_is_active(struct client *cl)
839 if (cl->connection && (cl->state == Client_Connecting ||
840 cl->state == Client_Working))
845 Odr_int client_get_hits(struct client *cl)
850 int client_get_num_records(struct client *cl)
852 return cl->record_offset;
855 void client_set_diagnostic(struct client *cl, int diagnostic)
857 cl->diagnostic = diagnostic;
860 int client_get_diagnostic(struct client *cl)
862 return cl->diagnostic;
865 void client_set_database(struct client *cl, struct session_database *db)
870 struct host *client_get_host(struct client *cl)
872 return client_get_database(cl)->database->host;
875 const char *client_get_url(struct client *cl)
878 return client_get_database(cl)->database->url;
883 void client_set_maxrecs(struct client *cl, int v)
888 void client_set_startrecs(struct client *cl, int v)
896 * c-file-style: "Stroustrup"
897 * indent-tabs-mode: nil
899 * vim: shiftwidth=4 tabstop=8 expandtab