src/client.c

   1 /* This file is part of Pazpar2.
   2    Copyright (C) Index Data
   3
   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
   7 version.
   8
   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
  12 for more details.
  13
  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
  17
  18 */
  19
  20 /** \file client.c
  21     \brief Z39.50 client
  22 */
  23
  24 #if HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27 #include <stdlib.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30 #if HAVE_SYS_TIME_H
  31 #include <sys/time.h>
  32 #endif
  33 #if HAVE_UNISTD_H
  34 #include <unistd.h>
  35 #endif
  36 #ifdef WIN32
  37 #include <windows.h>
  38 #endif
  39 #include <signal.h>
  40 #include <assert.h>
  41
  42 #include <yaz/marcdisp.h>
  43 #include <yaz/comstack.h>
  44 #include <yaz/tcpip.h>
  45 #include <yaz/proto.h>
  46 #include <yaz/readconf.h>
  47 #include <yaz/pquery.h>
  48 #include <yaz/otherinfo.h>
  49 #include <yaz/yaz-util.h>
  50 #include <yaz/nmem.h>
  51 #include <yaz/query-charset.h>
  52 #include <yaz/querytowrbuf.h>
  53 #include <yaz/oid_db.h>
  54 #include <yaz/diagbib1.h>
  55 #include <yaz/snprintf.h>
  56 #include <yaz/rpn2cql.h>
  57 #include <yaz/rpn2solr.h>
  58 #include <yaz/gettimeofday.h>
  59
  60 #define USE_TIMING 0
  61 #if USE_TIMING
  62 #include <yaz/timing.h>
  63 #endif
  64
  65 #include "ppmutex.h"
  66 #include "session.h"
  67 #include "parameters.h"
  68 #include "client.h"
  69 #include "connection.h"
  70 #include "settings.h"
  71 #include "relevance.h"
  72 #include "incref.h"
  73
  74 #define XDOC_CACHE_SIZE 100
  75
  76 static YAZ_MUTEX g_mutex = 0;
  77 static int no_clients = 0;
  78
  79 static int client_use(int delta)
  80 {
  81     int clients;
  82     if (!g_mutex)
  83         yaz_mutex_create(&g_mutex);
  84     yaz_mutex_enter(g_mutex);
  85     no_clients += delta;
  86     clients = no_clients;
  87     yaz_mutex_leave(g_mutex);
  88     yaz_log(YLOG_DEBUG, "%s clients=%d",
  89             delta == 0 ? "" : (delta > 0 ? "INC" : "DEC"), clients);
  90     return clients;
  91 }
  92
  93 int clients_count(void)
  94 {
  95     return client_use(0);
  96 }
  97
  98 /** \brief Represents client state for a connection to one search target */
  99 struct client {
 100     struct session_database *database;
 101     struct connection *connection;
 102     struct session *session;
 103     char *pquery; // Current search
 104     char *cqlquery; // used for SRU targets only
 105     char *addinfo; // diagnostic info for most resent error
 106     Odr_int hits;
 107     int record_offset;
 108     int show_stat_no;
 109     int filtered; /* number of records ignored for local filtering */
 110     int ingest_failures; /* number of records where XSLT/other failed */
 111     int record_failures; /* number of records where ZOOM reported error */
 112     int maxrecs;
 113     int startrecs;
 114     int diagnostic;
 115     char *message;
 116     int preferred;
 117     struct suggestions *suggestions;
 118     enum client_state state;
 119     struct show_raw *show_raw;
 120     ZOOM_resultset resultset;
 121     YAZ_MUTEX mutex;
 122     int ref_count;
 123     char *id;
 124     facet_limits_t facet_limits;
 125     int same_search;
 126     char *sort_strategy;
 127     char *sort_criteria;
 128     xmlDoc **xdoc;
 129 };
 130
 131 struct suggestions {
 132     NMEM nmem;
 133     int num;
 134     char **misspelled;
 135     char **suggest;
 136     char *passthrough;
 137 };
 138
 139 struct show_raw {
 140     int active; // whether this request has been sent to the server
 141     int position;
 142     int binary;
 143     char *syntax;
 144     char *esn;
 145     char *nativesyntax;
 146     void (*error_handler)(void *data, const char *addinfo);
 147     void (*record_handler)(void *data, const char *buf, size_t sz);
 148     void *data;
 149     struct show_raw *next;
 150 };
 151
 152 static const char *client_states[] = {
 153     "Client_Connecting",
 154     "Client_Idle",
 155     "Client_Working",
 156     "Client_Error",
 157     "Client_Failed",
 158     "Client_Disconnected"
 159 };
 160
 161 const char *client_get_state_str(struct client *cl)
 162 {
 163     return client_states[cl->state];
 164 }
 165
 166 enum client_state client_get_state(struct client *cl)
 167 {
 168     return cl->state;
 169 }
 170
 171 void client_set_state_nb(struct client *cl, enum client_state st)
 172 {
 173     cl->state = st;
 174 }
 175
 176 void client_set_state(struct client *cl, enum client_state st)
 177 {
 178     int was_active = 0;
 179     if (client_is_active(cl))
 180         was_active = 1;
 181     cl->state = st;
 182     /* If client is going from being active to inactive and all clients
 183        are now idle we fire a watch for the session . The assumption is
 184        that session is not mutex locked if client is already active */
 185     if (was_active && !client_is_active(cl) && cl->session)
 186     {
 187
 188         int no_active = session_active_clients(cl->session);
 189         yaz_log(YLOG_DEBUG, "%s: releasing watches on zero active: %d",
 190                 client_get_id(cl), no_active);
 191         if (no_active == 0) {
 192             session_alert_watch(cl->session, SESSION_WATCH_SHOW);
 193             session_alert_watch(cl->session, SESSION_WATCH_BYTARGET);
 194             session_alert_watch(cl->session, SESSION_WATCH_TERMLIST);
 195             session_alert_watch(cl->session, SESSION_WATCH_SHOW_PREF);
 196         }
 197     }
 198 }
 199
 200 static void client_init_xdoc(struct client *cl)
 201 {
 202     int i;
 203
 204     cl->xdoc = xmalloc(sizeof(*cl->xdoc) * XDOC_CACHE_SIZE);
 205     for (i = 0; i < XDOC_CACHE_SIZE; i++)
 206         cl->xdoc[i] = 0;
 207 }
 208
 209 static void client_destroy_xdoc(struct client *cl)
 210 {
 211     int i;
 212
 213     assert(cl->xdoc);
 214     for (i = 0; i < XDOC_CACHE_SIZE; i++)
 215         if (cl->xdoc[i])
 216             xmlFreeDoc(cl->xdoc[i]);
 217     xfree(cl->xdoc);
 218 }
 219
 220 xmlDoc *client_get_xdoc(struct client *cl, int record_no)
 221 {
 222     assert(cl->xdoc);
 223     if (record_no >= 0 && record_no < XDOC_CACHE_SIZE)
 224         return cl->xdoc[record_no];
 225     return 0;
 226 }
 227
 228 void client_store_xdoc(struct client *cl, int record_no, xmlDoc *xdoc)
 229 {
 230     assert(cl->xdoc);
 231     if (record_no >= 0 && record_no < XDOC_CACHE_SIZE)
 232     {
 233         if (cl->xdoc[record_no])
 234             xmlFreeDoc(cl->xdoc[record_no]);
 235         cl->xdoc[record_no] = xdoc;
 236     }
 237     else
 238     {
 239         xmlFreeDoc(xdoc);
 240     }
 241 }
 242
 243
 244 static void client_show_raw_error(struct client *cl, const char *addinfo);
 245
 246 struct connection *client_get_connection(struct client *cl)
 247 {
 248     return cl->connection;
 249 }
 250
 251 struct session_database *client_get_database(struct client *cl)
 252 {
 253     return cl->database;
 254 }
 255
 256 struct session *client_get_session(struct client *cl)
 257 {
 258     return cl->session;
 259 }
 260
 261 static void client_send_raw_present(struct client *cl);
 262 static int nativesyntax_to_type(const char *s, char *type, ZOOM_record rec);
 263
 264 static void client_show_immediate(
 265     ZOOM_resultset resultset, struct session_database *sdb, int position,
 266     void *data,
 267     void (*error_handler)(void *data, const char *addinfo),
 268     void (*record_handler)(void *data, const char *buf, size_t sz),
 269     int binary,
 270     const char *nativesyntax)
 271 {
 272     ZOOM_record rec = 0;
 273     char type[80];
 274     const char *buf;
 275     int len;
 276
 277     if (!resultset)
 278     {
 279         error_handler(data, "no resultset");
 280         return;
 281     }
 282     rec = ZOOM_resultset_record_immediate(resultset, position-1);
 283     if (!rec)
 284     {
 285         error_handler(data, "no record");
 286         return;
 287     }
 288     nativesyntax_to_type(nativesyntax, type, rec);
 289     buf = ZOOM_record_get(rec, type, &len);
 290     if (!buf)
 291     {
 292         error_handler(data, "no record");
 293         return;
 294     }
 295     record_handler(data, buf, len);
 296 }
 297
 298
 299 int client_show_raw_begin(struct client *cl, int position,
 300                           const char *syntax, const char *esn,
 301                           void *data,
 302                           void (*error_handler)(void *data, const char *addinfo),
 303                           void (*record_handler)(void *data, const char *buf,
 304                                                  size_t sz),
 305                           int binary,
 306                           const char *nativesyntax)
 307 {
 308     if (!nativesyntax)
 309     {
 310         if (binary)
 311             nativesyntax = "raw";
 312         else
 313         {
 314             struct session_database *sdb = client_get_database(cl);
 315             nativesyntax = session_setting_oneval(sdb, PZ_NATIVESYNTAX);
 316         }
 317     }
 318
 319     if (syntax == 0 && esn == 0)
 320         client_show_immediate(cl->resultset, client_get_database(cl),
 321                               position, data,
 322                               error_handler, record_handler,
 323                               binary, nativesyntax);
 324     else
 325     {
 326         struct show_raw *rr, **rrp;
 327
 328         if (!cl->connection)
 329             return -1;
 330
 331
 332         rr = xmalloc(sizeof(*rr));
 333         rr->position = position;
 334         rr->active = 0;
 335         rr->data = data;
 336         rr->error_handler = error_handler;
 337         rr->record_handler = record_handler;
 338         rr->binary = binary;
 339         if (syntax)
 340             rr->syntax = xstrdup(syntax);
 341         else
 342             rr->syntax = 0;
 343         if (esn)
 344             rr->esn = xstrdup(esn);
 345         else
 346             rr->esn = 0;
 347
 348         assert(nativesyntax);
 349         rr->nativesyntax = xstrdup(nativesyntax);
 350
 351         rr->next = 0;
 352
 353         for (rrp = &cl->show_raw; *rrp; rrp = &(*rrp)->next)
 354             ;
 355         *rrp = rr;
 356
 357         if (cl->state == Client_Failed)
 358         {
 359             client_show_raw_error(cl, "client failed");
 360         }
 361         else if (cl->state == Client_Disconnected)
 362         {
 363             client_show_raw_error(cl, "client disconnected");
 364         }
 365         else
 366         {
 367             client_send_raw_present(cl);
 368         }
 369     }
 370     return 0;
 371 }
 372
 373 static void client_show_raw_delete(struct show_raw *r)
 374 {
 375     xfree(r->syntax);
 376     xfree(r->esn);
 377     xfree(r->nativesyntax);
 378     xfree(r);
 379 }
 380
 381 void client_show_raw_remove(struct client *cl, void *data)
 382 {
 383     struct show_raw *rr = data;
 384     struct show_raw **rrp = &cl->show_raw;
 385     while (*rrp != rr)
 386         rrp = &(*rrp)->next;
 387     if (*rrp)
 388     {
 389         *rrp = rr->next;
 390         client_show_raw_delete(rr);
 391     }
 392 }
 393
 394 static void client_show_raw_dequeue(struct client *cl)
 395 {
 396     struct show_raw *rr = cl->show_raw;
 397
 398     cl->show_raw = rr->next;
 399     client_show_raw_delete(rr);
 400 }
 401
 402 static void client_show_raw_error(struct client *cl, const char *addinfo)
 403 {
 404     while (cl->show_raw)
 405     {
 406         cl->show_raw->error_handler(cl->show_raw->data, addinfo);
 407         client_show_raw_dequeue(cl);
 408     }
 409 }
 410
 411 static void client_send_raw_present(struct client *cl)
 412 {
 413     struct session_database *sdb = client_get_database(cl);
 414     struct connection *co = client_get_connection(cl);
 415     ZOOM_resultset set = cl->resultset;
 416
 417     int offset = cl->show_raw->position;
 418     const char *syntax = 0;
 419     const char *elements = 0;
 420
 421     assert(cl->show_raw);
 422     assert(set);
 423
 424     yaz_log(YLOG_DEBUG, "%s: trying to present %d record(s) from %d",
 425             client_get_id(cl), 1, offset);
 426
 427     if (cl->show_raw->syntax)
 428         syntax = cl->show_raw->syntax;
 429     else
 430         syntax = session_setting_oneval(sdb, PZ_REQUESTSYNTAX);
 431     ZOOM_resultset_option_set(set, "preferredRecordSyntax", syntax);
 432
 433     if (cl->show_raw->esn)
 434         elements = cl->show_raw->esn;
 435     else
 436         elements = session_setting_oneval(sdb, PZ_ELEMENTS);
 437     if (elements && *elements)
 438         ZOOM_resultset_option_set(set, "elementSetName", elements);
 439
 440     ZOOM_resultset_records(set, 0, offset-1, 1);
 441     cl->show_raw->active = 1;
 442
 443     connection_continue(co);
 444 }
 445
 446 static int nativesyntax_to_type(const char *s, char *type,
 447                                 ZOOM_record rec)
 448 {
 449     if (s && *s)
 450     {
 451         if (!strncmp(s, "iso2709", 7))
 452         {
 453             const char *cp = strchr(s, ';');
 454             yaz_snprintf(type, 80, "xml; charset=%s", cp ? cp+1 : "marc-8s");
 455         }
 456         else if (!strncmp(s, "txml", 4))
 457         {
 458             const char *cp = strchr(s, ';');
 459             yaz_snprintf(type, 80, "txml; charset=%s", cp ? cp+1 : "marc-8s");
 460         }
 461         else /* pass verbatim to ZOOM - including "xml" */
 462             strcpy(type, s);
 463         return 0;
 464     }
 465     else  /* attempt to deduce structure */
 466     {
 467         const char *syntax = ZOOM_record_get(rec, "syntax", NULL);
 468         if (syntax)
 469         {
 470             if (!strcmp(syntax, "XML"))
 471             {
 472                 strcpy(type, "xml");
 473                 return 0;
 474             }
 475             else if (!strcmp(syntax, "USmarc") || !strcmp(syntax, "MARC21"))
 476             {
 477                 strcpy(type, "xml; charset=marc8-s");
 478                 return 0;
 479             }
 480             else return -1;
 481         }
 482         else return -1;
 483     }
 484 }
 485
 486 /**
 487  * TODO Consider thread safety!!!
 488  *
 489  */
 490 static void client_report_facets(struct client *cl, ZOOM_resultset rs)
 491 {
 492     struct session_database *sdb = client_get_database(cl);
 493     ZOOM_facet_field *facets = ZOOM_resultset_facets(rs);
 494
 495     if (sdb && facets)
 496     {
 497         struct session *se = client_get_session(cl);
 498         int facet_num = ZOOM_resultset_facets_size(rs);
 499         struct setting *s;
 500
 501         for (s = sdb->settings[PZ_FACETMAP]; s; s = s->next)
 502         {
 503             const char *p = strchr(s->name + 3, ':');
 504             if (p && p[1] && s->value && s->value[0])
 505             {
 506                 int facet_idx;
 507                 p++; /* p now holds logical facet name */
 508                 for (facet_idx = 0; facet_idx < facet_num; facet_idx++)
 509                 {
 510                     const char *native_name =
 511                         ZOOM_facet_field_name(facets[facet_idx]);
 512                     if (native_name && !strcmp(s->value, native_name))
 513                     {
 514                         size_t term_idx;
 515                         size_t term_num =
 516                             ZOOM_facet_field_term_count(facets[facet_idx]);
 517                         for (term_idx = 0; term_idx < term_num; term_idx++ )
 518                         {
 519                             int freq;
 520                             const char *term =
 521                                 ZOOM_facet_field_get_term(facets[facet_idx],
 522                                                           term_idx, &freq);
 523                             if (term)
 524                                 add_facet(se, p, term, freq);
 525                         }
 526                         break;
 527                     }
 528                 }
 529             }
 530         }
 531     }
 532 }
 533
 534 static void ingest_raw_record(struct client *cl, ZOOM_record rec)
 535 {
 536     const char *buf;
 537     int len;
 538     char type[80];
 539
 540     nativesyntax_to_type(cl->show_raw->nativesyntax, type, rec);
 541     buf = ZOOM_record_get(rec, type, &len);
 542     cl->show_raw->record_handler(cl->show_raw->data,  buf, len);
 543     client_show_raw_dequeue(cl);
 544 }
 545
 546 void client_check_preferred_watch(struct client *cl)
 547 {
 548     struct session *se = cl->session;
 549     yaz_log(YLOG_DEBUG, "client_check_preferred_watch: %s ", client_get_id(cl));
 550     if (se)
 551     {
 552         client_unlock(cl);
 553         /* TODO possible threading issue. Session can have been destroyed */
 554         if (session_is_preferred_clients_ready(se)) {
 555             session_alert_watch(se, SESSION_WATCH_SHOW_PREF);
 556         }
 557         else
 558             yaz_log(YLOG_DEBUG, "client_check_preferred_watch: Still locked on preferred targets.");
 559
 560         client_lock(cl);
 561     }
 562     else
 563         yaz_log(YLOG_WARN, "client_check_preferred_watch: %s. No session!", client_get_id(cl));
 564
 565 }
 566
 567 struct suggestions* client_suggestions_create(const char* suggestions_string);
 568 static void client_suggestions_destroy(struct client *cl);
 569
 570 void client_search_response(struct client *cl)
 571 {
 572     struct connection *co = cl->connection;
 573     ZOOM_connection link = connection_get_link(co);
 574     ZOOM_resultset resultset = cl->resultset;
 575     struct session *se = client_get_session(cl);
 576
 577     const char *error, *addinfo = 0;
 578
 579     if (ZOOM_connection_error(link, &error, &addinfo))
 580     {
 581         cl->hits = 0;
 582         session_log(se, YLOG_WARN, "%s: Error %s (%s)",
 583                     client_get_id(cl), error, addinfo);
 584         client_set_state(cl, Client_Error);
 585     }
 586     else
 587     {
 588         client_report_facets(cl, resultset);
 589         cl->record_offset = cl->startrecs;
 590         cl->hits = ZOOM_resultset_size(resultset);
 591         session_log(se, YLOG_LOG, "%s: hits: " ODR_INT_PRINTF,
 592                     client_get_id(cl), cl->hits);
 593         if (cl->suggestions)
 594             client_suggestions_destroy(cl);
 595         cl->suggestions =
 596             client_suggestions_create(ZOOM_resultset_option_get(
 597                                           resultset, "suggestions"));
 598     }
 599 }
 600
 601 void client_got_records(struct client *cl)
 602 {
 603     struct session *se = cl->session;
 604     if (se)
 605     {
 606         if (reclist_get_num_records(se->reclist) > 0)
 607         {
 608             client_unlock(cl);
 609             session_alert_watch(se, SESSION_WATCH_SHOW);
 610             session_alert_watch(se, SESSION_WATCH_BYTARGET);
 611             session_alert_watch(se, SESSION_WATCH_TERMLIST);
 612             session_alert_watch(se, SESSION_WATCH_RECORD);
 613             client_lock(cl);
 614         }
 615     }
 616 }
 617
 618 static void client_record_ingest(struct client *cl)
 619 {
 620     const char *msg, *addinfo;
 621     ZOOM_record rec = 0;
 622     ZOOM_resultset resultset = cl->resultset;
 623     struct session *se = client_get_session(cl);
 624     xmlDoc *xdoc;
 625     int offset = cl->record_offset + 1; /* 0 versus 1 numbered offsets */
 626
 627     xdoc = client_get_xdoc(cl, offset);
 628     if (xdoc)
 629     {
 630         if (cl->session)
 631         {
 632             NMEM nmem = nmem_create();
 633             int rc = ingest_xml_record(cl, xdoc, offset, nmem, 1);
 634             if (rc == -1)
 635             {
 636                 session_log(se, YLOG_WARN,
 637                             "%s: #%d: failed to ingest xdoc",
 638                             client_get_id(cl), offset);
 639                 cl->ingest_failures++;
 640             }
 641             else if (rc == -2)
 642                 cl->filtered++;
 643             nmem_destroy(nmem);
 644         }
 645     }
 646     else if ((rec = ZOOM_resultset_record_immediate(resultset,
 647                                                     cl->record_offset)))
 648     {
 649         if (cl->session == 0)
 650             ;  /* no operation */
 651         else if (ZOOM_record_error(rec, &msg, &addinfo, 0))
 652         {
 653             session_log(se, YLOG_WARN, "Record error %s (%s): %s #%d",
 654                         msg, addinfo, client_get_id(cl), offset);
 655             cl->record_failures++;
 656         }
 657         else
 658         {
 659             struct session_database *sdb = client_get_database(cl);
 660             NMEM nmem = nmem_create();
 661             const char *xmlrec;
 662             char type[80];
 663
 664             const char *s = session_setting_oneval(sdb, PZ_NATIVESYNTAX);
 665             if (nativesyntax_to_type(s, type, rec))
 666                 session_log(se, YLOG_WARN, "Failed to determine record type");
 667             xmlrec = ZOOM_record_get(rec, type, NULL);
 668             if (!xmlrec)
 669             {
 670                 const char *rec_syn =  ZOOM_record_get(rec, "syntax", NULL);
 671                 session_log(se, YLOG_WARN, "%s: #%d: ZOOM_record_get failed",
 672                             client_get_id(cl), offset);
 673                 session_log(se, YLOG_LOG, "pz:nativesyntax=%s . "
 674                             "ZOOM record type=%s . Actual record syntax=%s",
 675                             s ? s : "null", type,
 676                             rec_syn ? rec_syn : "null");
 677                 cl->ingest_failures++;
 678             }
 679             else
 680             {
 681                 /* OK = 0, -1 = failure, -2 = Filtered */
 682                 int rc = ingest_record(cl, xmlrec, offset, nmem);
 683                 if (rc == -1)
 684                 {
 685                     const char *rec_syn =  ZOOM_record_get(rec, "syntax", NULL);
 686                     session_log(se, YLOG_WARN,
 687                                 "%s: #%d: failed to ingest record",
 688                                 client_get_id(cl), offset);
 689                     session_log(se, YLOG_LOG, "pz:nativesyntax=%s . "
 690                                 "ZOOM record type=%s . Actual record syntax=%s",
 691                                 s ? s : "null", type,
 692                                 rec_syn ? rec_syn : "null");
 693                     cl->ingest_failures++;
 694                 }
 695                 else if (rc == -2)
 696                     cl->filtered++;
 697             }
 698             nmem_destroy(nmem);
 699         }
 700     }
 701     else
 702     {
 703         session_log(se, YLOG_WARN, "Got NULL record from %s #%d",
 704                     client_get_id(cl), offset);
 705     }
 706     cl->record_offset++;
 707 }
 708
 709 void client_record_response(struct client *cl, int *got_records)
 710 {
 711     struct connection *co = cl->connection;
 712     ZOOM_connection link = connection_get_link(co);
 713     ZOOM_resultset resultset = cl->resultset;
 714     const char *error, *addinfo;
 715
 716     if (ZOOM_connection_error(link, &error, &addinfo))
 717     {
 718         struct session *se = client_get_session(cl);
 719         session_log(se, YLOG_WARN, "%s: Error %s (%s)",
 720                     client_get_id(cl), error, addinfo);
 721         client_set_state(cl, Client_Error);
 722     }
 723     else
 724     {
 725         if (cl->show_raw && cl->show_raw->active)
 726         {
 727             ZOOM_record rec = 0;
 728             if ((rec = ZOOM_resultset_record_immediate(
 729                      resultset, cl->show_raw->position-1)))
 730             {
 731                 cl->show_raw->active = 0;
 732                 ingest_raw_record(cl, rec);
 733             }
 734             else
 735             {
 736                 yaz_log(YLOG_WARN, "Expected record, but got NULL, offset=%d",
 737                         cl->show_raw->position-1);
 738             }
 739         }
 740         else
 741         {
 742             client_record_ingest(cl);
 743             *got_records = 1;
 744         }
 745     }
 746 }
 747
 748 int client_reingest(struct client *cl)
 749 {
 750     int i = cl->startrecs;
 751     int to = cl->record_offset;
 752     cl->record_failures = cl->ingest_failures = cl->filtered = 0;
 753
 754     cl->record_offset = i;
 755     for (; i < to; i++)
 756         client_record_ingest(cl);
 757     return 0;
 758 }
 759
 760 static void client_set_facets_request(struct client *cl, ZOOM_connection link)
 761 {
 762     struct session_database *sdb = client_get_database(cl);
 763
 764     WRBUF w = wrbuf_alloc();
 765
 766     struct setting *s;
 767
 768     for (s = sdb->settings[PZ_FACETMAP]; s; s = s->next)
 769     {
 770         const char *p = strchr(s->name + 3, ':');
 771         if (!p)
 772         {
 773             yaz_log(YLOG_WARN, "Malformed facetmap name: %s", s->name);
 774         }
 775         else if (s->value && s->value[0])
 776         {
 777             wrbuf_puts(w, "@attr 1=");
 778             yaz_encode_pqf_term(w, s->value, strlen(s->value));
 779             if (s->next)
 780                 wrbuf_puts(w, ",");
 781         }
 782     }
 783     yaz_log(YLOG_DEBUG, "using facets str: %s", wrbuf_cstr(w));
 784     ZOOM_connection_option_set(link, "facets",
 785                                wrbuf_len(w) ? wrbuf_cstr(w) : 0);
 786     wrbuf_destroy(w);
 787 }
 788
 789 int client_has_facet(struct client *cl, const char *name)
 790 {
 791     struct session_database *sdb = client_get_database(cl);
 792     struct setting *s;
 793
 794     for (s = sdb->settings[PZ_FACETMAP]; s; s = s->next)
 795     {
 796         const char *p = strchr(s->name + 3, ':');
 797         if (p && !strcmp(name, p + 1))
 798             return 1;
 799     }
 800     return 0;
 801 }
 802
 803 static const char *get_strategy_plus_sort(struct client *l, const char *field)
 804 {
 805     struct session_database *sdb = client_get_database(l);
 806     struct setting *s;
 807
 808     const char *strategy_plus_sort = 0;
 809
 810     for (s = sdb->settings[PZ_SORTMAP]; s; s = s->next)
 811     {
 812         char *p = strchr(s->name + 3, ':');
 813         if (!p)
 814         {
 815             yaz_log(YLOG_WARN, "Malformed sortmap name: %s", s->name);
 816             continue;
 817         }
 818         p++;
 819         if (!strcmp(p, field))
 820         {
 821             strategy_plus_sort = s->value;
 822             break;
 823         }
 824     }
 825     return strategy_plus_sort;
 826 }
 827
 828 void client_update_show_stat(struct client *cl, int cmd)
 829 {
 830     if (cmd == 0)
 831         cl->show_stat_no = 0;
 832     else if (cmd == 1)
 833         cl->show_stat_no++;
 834 }
 835
 836 int client_fetch_more(struct client *cl)
 837 {
 838     struct session_database *sdb = client_get_database(cl);
 839     const char *str;
 840     int extend_recs = 0;
 841     int number = cl->hits - cl->record_offset;
 842
 843     str = session_setting_oneval(sdb, PZ_EXTENDRECS);
 844     if (!str || !*str)
 845         return 0;
 846
 847     extend_recs = atoi(str);
 848
 849     yaz_log(YLOG_LOG, "cl=%s show_stat_no=%d got=%d",
 850             client_get_id(cl), cl->show_stat_no, cl->record_offset);
 851     if (cl->show_stat_no < cl->record_offset)
 852         return 0;
 853     yaz_log(YLOG_LOG, "cl=%s Trying to fetch more", client_get_id(cl));
 854
 855     if (number > extend_recs)
 856         number = extend_recs;
 857     if (number > 0)
 858     {
 859         ZOOM_resultset set = cl->resultset;
 860         struct connection *co = client_get_connection(cl);
 861
 862         str = session_setting_oneval(sdb, PZ_REQUESTSYNTAX);
 863         ZOOM_resultset_option_set(set, "preferredRecordSyntax", str);
 864         str = session_setting_oneval(sdb, PZ_ELEMENTS);
 865         if (str && *str)
 866             ZOOM_resultset_option_set(set, "elementSetName", str);
 867
 868         ZOOM_resultset_records(set, 0, cl->record_offset, number);
 869         client_set_state(cl, Client_Working);
 870         connection_continue(co);
 871         return 1;
 872     }
 873     else
 874     {
 875         yaz_log(YLOG_LOG, "cl=%s. OK no more in total set", client_get_id(cl));
 876     }
 877     return 0;
 878 }
 879
 880 int client_parse_init(struct client *cl, int same_search)
 881 {
 882     cl->same_search = same_search;
 883     return 0;
 884 }
 885
 886 /*
 887  * TODO consider how to extend the range
 888  * */
 889 int client_parse_range(struct client *cl, const char *startrecs,
 890                        const char *maxrecs)
 891 {
 892     if (maxrecs && atoi(maxrecs) != cl->maxrecs)
 893     {
 894         cl->same_search = 0;
 895         cl->maxrecs = atoi(maxrecs);
 896     }
 897
 898     if (startrecs && atoi(startrecs) != cl->startrecs)
 899     {
 900         cl->same_search = 0;
 901         cl->startrecs = atoi(startrecs);
 902     }
 903
 904     return 0;
 905 }
 906
 907 int client_start_search(struct client *cl)
 908 {
 909     struct session_database *sdb = client_get_database(cl);
 910     struct connection *co = 0;
 911     ZOOM_connection link = 0;
 912     struct session *se = client_get_session(cl);
 913     ZOOM_resultset rs;
 914     const char *opt_piggyback   = session_setting_oneval(sdb, PZ_PIGGYBACK);
 915     const char *opt_queryenc    = session_setting_oneval(sdb, PZ_QUERYENCODING);
 916     const char *opt_elements    = session_setting_oneval(sdb, PZ_ELEMENTS);
 917     const char *opt_requestsyn  = session_setting_oneval(sdb, PZ_REQUESTSYNTAX);
 918     const char *opt_maxrecs     = session_setting_oneval(sdb, PZ_MAXRECS);
 919     const char *opt_sru         = session_setting_oneval(sdb, PZ_SRU);
 920     const char *opt_sort        = session_setting_oneval(sdb, PZ_SORT);
 921     const char *opt_preferred   = session_setting_oneval(sdb, PZ_PREFERRED);
 922     const char *extra_args      = session_setting_oneval(sdb, PZ_EXTRA_ARGS);
 923     const char *opt_present_chunk = session_setting_oneval(sdb, PZ_PRESENT_CHUNK);
 924     const char *opt_timeout     = session_setting_oneval(sdb, PZ_TIMEOUT);
 925     ZOOM_query query;
 926     char maxrecs_str[24], startrecs_str[24], present_chunk_str[24];
 927     struct timeval tval;
 928     int present_chunk = 20; // Default chunk size
 929     int rc_prep_connection;
 930     int operation_timeout = se->service->z3950_operation_timeout;
 931
 932     cl->diagnostic = 0;
 933     cl->record_failures = cl->ingest_failures = cl->filtered = 0;
 934
 935     yaz_gettimeofday(&tval);
 936     tval.tv_sec += 5;
 937
 938     if (opt_timeout && *opt_timeout)
 939         operation_timeout = atoi(opt_timeout);
 940
 941     if (opt_present_chunk && strcmp(opt_present_chunk,"")) {
 942         present_chunk = atoi(opt_present_chunk);
 943         yaz_log(YLOG_DEBUG, "Present chunk set to %d", present_chunk);
 944     }
 945     rc_prep_connection =
 946         client_prep_connection(cl, operation_timeout,
 947                                se->service->z3950_session_timeout,
 948                                se->service->server->iochan_man,
 949                                &tval);
 950     /* Nothing has changed and we already have a result */
 951     if (cl->same_search == 1 && rc_prep_connection == 2)
 952     {
 953         session_log(se, YLOG_LOG, "%s: reuse result", client_get_id(cl));
 954         client_report_facets(cl, cl->resultset);
 955         return client_reingest(cl);
 956     }
 957     else if (!rc_prep_connection)
 958     {
 959         session_log(se, YLOG_LOG, "%s: postponing search: No connection",
 960                     client_get_id(cl));
 961         client_set_state_nb(cl, Client_Working);
 962         return -1;
 963     }
 964     co = client_get_connection(cl);
 965     assert(cl);
 966     link = connection_get_link(co);
 967     assert(link);
 968
 969     session_log(se, YLOG_LOG, "%s: new search", client_get_id(cl));
 970
 971     client_destroy_xdoc(cl);
 972     client_init_xdoc(cl);
 973
 974     if (extra_args && *extra_args)
 975         ZOOM_connection_option_set(link, "extraArgs", extra_args);
 976
 977     if (opt_preferred) {
 978         cl->preferred = atoi(opt_preferred);
 979         if (cl->preferred)
 980             yaz_log(YLOG_LOG, "Target %s has preferred status: %d",
 981                     client_get_id(cl), cl->preferred);
 982     }
 983
 984     if (*opt_piggyback)
 985         ZOOM_connection_option_set(link, "piggyback", opt_piggyback);
 986     else
 987         ZOOM_connection_option_set(link, "piggyback", "1");
 988     if (*opt_queryenc)
 989         ZOOM_connection_option_set(link, "rpnCharset", opt_queryenc);
 990     if (*opt_sru && *opt_elements)
 991         ZOOM_connection_option_set(link, "schema", opt_elements);
 992     else if (*opt_elements)
 993         ZOOM_connection_option_set(link, "elementSetName", opt_elements);
 994     if (*opt_requestsyn)
 995         ZOOM_connection_option_set(link, "preferredRecordSyntax", opt_requestsyn);
 996
 997     if (opt_maxrecs && *opt_maxrecs)
 998     {
 999         cl->maxrecs = atoi(opt_maxrecs);
1000     }
1001
1002     /* convert back to string representation used in ZOOM API */
1003     sprintf(maxrecs_str, "%d", cl->maxrecs);
1004     ZOOM_connection_option_set(link, "count", maxrecs_str);
1005
1006     /* A present_chunk less than 1 will disable chunking. */
1007     if (present_chunk > 0 && cl->maxrecs > present_chunk) {
1008         sprintf(present_chunk_str, "%d", present_chunk);
1009         ZOOM_connection_option_set(link, "presentChunk", present_chunk_str);
1010         yaz_log(YLOG_DEBUG, "Present chunk set to %s", present_chunk_str);
1011     }
1012     else {
1013         ZOOM_connection_option_set(link, "presentChunk", maxrecs_str);
1014         yaz_log(YLOG_DEBUG, "Present chunk set to %s (maxrecs)", maxrecs_str);
1015     }
1016     sprintf(startrecs_str, "%d", cl->startrecs);
1017     ZOOM_connection_option_set(link, "start", startrecs_str);
1018
1019     /* TODO Verify does it break something for CQL targets(non-SOLR) ? */
1020     /* facets definition is in PQF */
1021     client_set_facets_request(cl, link);
1022
1023     query = ZOOM_query_create();
1024     if (cl->cqlquery)
1025     {
1026         session_log(se, YLOG_LOG, "%s: Search CQL: %s", client_get_id(cl),
1027                     cl->cqlquery);
1028         ZOOM_query_cql(query, cl->cqlquery);
1029         if (*opt_sort)
1030             ZOOM_query_sortby(query, opt_sort);
1031     }
1032     else
1033     {
1034         session_log(se, YLOG_LOG, "%s: Search PQF: %s", client_get_id(cl),
1035                     cl->pquery);
1036         ZOOM_query_prefix(query, cl->pquery);
1037     }
1038     if (cl->sort_strategy && cl->sort_criteria) {
1039         yaz_log(YLOG_LOG, "Client %s: "
1040                 "Set ZOOM sort strategy and criteria: %s %s",
1041                 client_get_id(cl), cl->sort_strategy, cl->sort_criteria);
1042         ZOOM_query_sortby2(query, cl->sort_strategy, cl->sort_criteria);
1043     }
1044
1045     yaz_log(YLOG_DEBUG,"Client %s: Starting search", client_get_id(cl));
1046     client_set_state(cl, Client_Working);
1047     cl->hits = 0;
1048     cl->record_offset = 0;
1049     rs = ZOOM_connection_search(link, query);
1050     ZOOM_query_destroy(query);
1051     ZOOM_resultset_destroy(cl->resultset);
1052     cl->resultset = rs;
1053     connection_continue(co);
1054     return 0;
1055 }
1056
1057 struct client *client_create(const char *id)
1058 {
1059     struct client *cl = xmalloc(sizeof(*cl));
1060     cl->maxrecs = 100;
1061     cl->startrecs = 0;
1062     cl->pquery = 0;
1063     cl->cqlquery = 0;
1064     cl->addinfo = 0;
1065     cl->message = 0;
1066     cl->database = 0;
1067     cl->connection = 0;
1068     cl->session = 0;
1069     cl->hits = 0;
1070     cl->record_offset = 0;
1071     cl->filtered = 0;
1072     cl->diagnostic = 0;
1073     cl->state = Client_Disconnected;
1074     cl->show_raw = 0;
1075     cl->resultset = 0;
1076     cl->suggestions = 0;
1077     cl->mutex = 0;
1078     pazpar2_mutex_create(&cl->mutex, "client");
1079     cl->preferred = 0;
1080     cl->ref_count = 1;
1081     cl->facet_limits = 0;
1082     cl->sort_strategy = 0;
1083     cl->sort_criteria = 0;
1084     assert(id);
1085     cl->id = xstrdup(id);
1086     client_init_xdoc(cl);
1087     client_use(1);
1088
1089     yaz_log(YLOG_DEBUG, "client_create c=%p %s", cl, id);
1090     return cl;
1091 }
1092
1093 void client_lock(struct client *c)
1094 {
1095     yaz_mutex_enter(c->mutex);
1096 }
1097
1098 void client_unlock(struct client *c)
1099 {
1100     yaz_mutex_leave(c->mutex);
1101 }
1102
1103 void client_incref(struct client *c)
1104 {
1105     pazpar2_incref(&c->ref_count, c->mutex);
1106     yaz_log(YLOG_DEBUG, "client_incref c=%p %s cnt=%d",
1107             c, client_get_id(c), c->ref_count);
1108 }
1109
1110 int client_destroy(struct client *c)
1111 {
1112     if (c)
1113     {
1114         yaz_log(YLOG_DEBUG, "client_destroy c=%p %s cnt=%d",
1115                 c, client_get_id(c), c->ref_count);
1116         if (!pazpar2_decref(&c->ref_count, c->mutex))
1117         {
1118             xfree(c->pquery);
1119             c->pquery = 0;
1120             xfree(c->cqlquery);
1121             c->cqlquery = 0;
1122             xfree(c->addinfo);
1123             c->addinfo = 0;
1124             xfree(c->message);
1125             c->message = 0;
1126             xfree(c->id);
1127             xfree(c->sort_strategy);
1128             xfree(c->sort_criteria);
1129             assert(!c->connection);
1130             facet_limits_destroy(c->facet_limits);
1131
1132             client_destroy_xdoc(c);
1133             if (c->resultset)
1134             {
1135                 ZOOM_resultset_destroy(c->resultset);
1136             }
1137             yaz_mutex_destroy(&c->mutex);
1138             xfree(c);
1139             client_use(-1);
1140             return 1;
1141         }
1142     }
1143     return 0;
1144 }
1145
1146 void client_set_connection(struct client *cl, struct connection *con)
1147 {
1148     if (cl->resultset)
1149         ZOOM_resultset_release(cl->resultset);
1150     if (con)
1151     {
1152         assert(cl->connection == 0);
1153         cl->connection = con;
1154         client_incref(cl);
1155     }
1156     else
1157     {
1158         client_lock(cl);
1159         cl->connection = con;
1160         client_unlock(cl);
1161         client_destroy(cl);
1162     }
1163 }
1164
1165 void client_disconnect(struct client *cl)
1166 {
1167     if (cl->state != Client_Idle)
1168         client_set_state(cl, Client_Disconnected);
1169     client_set_connection(cl, 0);
1170 }
1171
1172 void client_mark_dead(struct client *cl)
1173 {
1174     if (cl->connection)
1175         connection_mark_dead(cl->connection);
1176 }
1177
1178 void client_stop(struct client *cl)
1179 {
1180     client_lock(cl);
1181     if (cl->state == Client_Working || cl->state == Client_Connecting)
1182     {
1183         yaz_log(YLOG_LOG, "client_stop: %s release", client_get_id(cl));
1184         if (cl->connection)
1185         {
1186             connection_release2(cl->connection);
1187             assert(cl->ref_count > 1);
1188             cl->ref_count--;
1189             cl->connection = 0;
1190         }
1191         cl->state = Client_Disconnected;
1192     }
1193     else
1194         yaz_log(YLOG_LOG, "client_stop: %s ignore", client_get_id(cl));
1195     client_unlock(cl);
1196 }
1197
1198 // Initialize CCL map for a target
1199 static CCL_bibset prepare_cclmap(struct client *cl, CCL_bibset base_bibset)
1200 {
1201     struct session_database *sdb = client_get_database(cl);
1202     struct setting *s;
1203     CCL_bibset res;
1204
1205     if (!sdb->settings)
1206         return 0;
1207     if (base_bibset)
1208         res = ccl_qual_dup(base_bibset);
1209     else
1210         res = ccl_qual_mk();
1211     for (s = sdb->settings[PZ_CCLMAP]; s; s = s->next)
1212     {
1213         const char *addinfo = 0;
1214         char *p = strchr(s->name + 3, ':');
1215         if (!p)
1216         {
1217             WRBUF w = wrbuf_alloc();
1218             wrbuf_printf(w, "Malformed cclmap. name=%s", s->name);
1219             yaz_log(YLOG_WARN, "%s: %s", client_get_id(cl), wrbuf_cstr(w));
1220             client_set_diagnostic(cl, ZOOM_ERROR_CCL_CONFIG,
1221                                   ZOOM_diag_str(ZOOM_ERROR_CCL_CONFIG),
1222                                   wrbuf_cstr(w));
1223             client_set_state_nb(cl, Client_Error);
1224             ccl_qual_rm(&res);
1225             wrbuf_destroy(w);
1226             return 0;
1227         }
1228         p++;
1229         if (ccl_qual_fitem2(res, s->value, p, &addinfo))
1230         {
1231             WRBUF w = wrbuf_alloc();
1232
1233             wrbuf_printf(w, "Malformed cclmap. name=%s: value=%s (%s)",
1234                          s->name, p, addinfo);
1235             yaz_log(YLOG_WARN, "%s: %s", client_get_id(cl), wrbuf_cstr(w));
1236             client_set_diagnostic(cl, ZOOM_ERROR_CCL_CONFIG,
1237                                   ZOOM_diag_str(ZOOM_ERROR_CCL_CONFIG),
1238                                   wrbuf_cstr(w));
1239             client_set_state_nb(cl, Client_Error);
1240             ccl_qual_rm(&res);
1241             wrbuf_destroy(w);
1242             return 0;
1243         }
1244     }
1245     return res;
1246 }
1247
1248 // returns a xmalloced CQL query corresponding to the pquery in client
1249 static char *make_cqlquery(struct client *cl, Z_RPNQuery *zquery)
1250 {
1251     cql_transform_t cqlt = cql_transform_create();
1252     char *r = 0;
1253     WRBUF wrb = wrbuf_alloc();
1254     int status;
1255
1256     if ((status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery)))
1257     {
1258         yaz_log(YLOG_WARN, "Failed to generate CQL query, code=%d", status);
1259     }
1260     else
1261     {
1262         r = xstrdup(wrbuf_cstr(wrb));
1263     }
1264     wrbuf_destroy(wrb);
1265     cql_transform_close(cqlt);
1266     return r;
1267 }
1268
1269 // returns a xmalloced SOLR query corresponding to the pquery in client
1270 // TODO Could prob. be merge with the similar make_cqlquery
1271 static char *make_solrquery(struct client *cl, Z_RPNQuery *zquery)
1272 {
1273     solr_transform_t sqlt = solr_transform_create();
1274     char *r = 0;
1275     WRBUF wrb = wrbuf_alloc();
1276     int status;
1277
1278     if ((status = solr_transform_rpn2solr_wrbuf(sqlt, wrb, zquery)))
1279     {
1280         yaz_log(YLOG_WARN, "Failed to generate SOLR query, code=%d", status);
1281     }
1282     else
1283     {
1284         r = xstrdup(wrbuf_cstr(wrb));
1285     }
1286     wrbuf_destroy(wrb);
1287     solr_transform_close(sqlt);
1288     return r;
1289 }
1290
1291 const char *client_get_facet_limit_local(struct client *cl,
1292                                          struct session_database *sdb,
1293                                          int *l,
1294                                          NMEM nmem, int *num, char ***values)
1295 {
1296     const char *name = 0;
1297     const char *value = 0;
1298     for (; (name = facet_limits_get(cl->facet_limits, *l, &value)); (*l)++)
1299     {
1300         struct setting *s = 0;
1301
1302         for (s = sdb->settings[PZ_LIMITMAP]; s; s = s->next)
1303         {
1304             const char *p = strchr(s->name + 3, ':');
1305             if (p && !strcmp(p + 1, name) && s->value)
1306             {
1307                 int j, cnum;
1308                 char **cvalues;
1309                 nmem_strsplit_escape2(nmem, ",", s->value, &cvalues,
1310                                       &cnum, 1, '\\', 1);
1311                 for (j = 0; j < cnum; j++)
1312                 {
1313                     const char *cvalue = cvalues[j];
1314                     while (*cvalue == ' ')
1315                         cvalue++;
1316                     if (!strncmp(cvalue, "local:", 6))
1317                     {
1318                         const char *cp = cvalue + 6;
1319                         while (*cp == ' ')
1320                             cp++;
1321                         nmem_strsplit_escape2(nmem, "|", value, values,
1322                                               num, 1, '\\', 1);
1323                         (*l)++;
1324                         return *cp ? cp : name;
1325                     }
1326                 }
1327             }
1328         }
1329     }
1330     return 0;
1331 }
1332
1333 static int apply_limit(struct session_database *sdb,
1334                        facet_limits_t facet_limits,
1335                        WRBUF w_pqf, CCL_bibset ccl_map,
1336                        struct conf_service *service)
1337 {
1338     int ret = 0;
1339     int i = 0;
1340     const char *name;
1341     const char *value;
1342
1343     NMEM nmem_tmp = nmem_create();
1344     for (i = 0; (name = facet_limits_get(facet_limits, i, &value)); i++)
1345     {
1346         struct setting *s = 0;
1347         nmem_reset(nmem_tmp);
1348         /* name="pz:limitmap:author" value="rpn:@attr 1=4|local:other" */
1349         for (s = sdb->settings[PZ_LIMITMAP]; s; s = s->next)
1350         {
1351             const char *p = strchr(s->name + 3, ':');
1352             if (p && !strcmp(p + 1, name) && s->value)
1353             {
1354                 char **values = 0;
1355                 int i, num = 0;
1356                 char **cvalues = 0;
1357                 int j, cnum = 0;
1358                 nmem_strsplit_escape2(nmem_tmp, "|", value, &values,
1359                                       &num, 1, '\\', 1);
1360
1361                 nmem_strsplit_escape2(nmem_tmp, ",", s->value, &cvalues,
1362                                       &cnum, 1, '\\', 1);
1363
1364                 for (j = 0; ret == 0 && j < cnum; j++)
1365                 {
1366                     const char *cvalue = cvalues[j];
1367                     while (*cvalue == ' ')
1368                         cvalue++;
1369                     if (!strncmp(cvalue, "rpn:", 4))
1370                     {
1371                         const char *pqf = cvalue + 4;
1372                         wrbuf_puts(w_pqf, "@and ");
1373                         wrbuf_puts(w_pqf, pqf);
1374                         wrbuf_puts(w_pqf, " ");
1375                         for (i = 0; i < num; i++)
1376                         {
1377                             if (i < num - 1)
1378                                 wrbuf_puts(w_pqf, "@or ");
1379                             yaz_encode_pqf_term(w_pqf, values[i],
1380                                                 strlen(values[i]));
1381                         }
1382                     }
1383                     else if (!strncmp(cvalue, "ccl:", 4))
1384                     {
1385                         const char *ccl = cvalue + 4;
1386                         WRBUF ccl_w = wrbuf_alloc();
1387                         for (i = 0; i < num; i++)
1388                         {
1389                             int cerror, cpos;
1390                             struct ccl_rpn_node *cn;
1391                             wrbuf_rewind(ccl_w);
1392                             wrbuf_puts(ccl_w, ccl);
1393                             wrbuf_puts(ccl_w, "=\"");
1394                             wrbuf_puts(ccl_w, values[i]);
1395                             wrbuf_puts(ccl_w, "\"");
1396
1397                             cn = ccl_find_str(ccl_map, wrbuf_cstr(ccl_w),
1398                                               &cerror, &cpos);
1399                             if (cn)
1400                             {
1401                                 if (i == 0)
1402                                     wrbuf_printf(w_pqf, "@and ");
1403
1404                                 /* or multiple values.. could be bad if last
1405                                    CCL parse fails, but this is unlikely to
1406                                    happen */
1407                                 if (i < num - 1)
1408                                     wrbuf_printf(w_pqf, "@or ");
1409                                 ccl_pquery(w_pqf, cn);
1410                                 ccl_rpn_delete(cn);
1411                             }
1412                         }
1413                         wrbuf_destroy(ccl_w);
1414                     }
1415                     else if (!strncmp(cvalue, "local:", 6)) {
1416                         /* no operation */
1417                     }
1418                     else
1419                     {
1420                         yaz_log(YLOG_WARN, "Target %s: Bad limitmap '%s'",
1421                                 sdb->database->id, cvalue);
1422                         ret = -1; /* bad limitmap */
1423                     }
1424                 }
1425                 break;
1426             }
1427         }
1428         if (!s)
1429         {
1430             int i;
1431             for (i = 0; i < service->num_metadata; i++)
1432             {
1433                 struct conf_metadata *md = service->metadata + i;
1434                 if (!strcmp(md->name, name) && md->limitcluster)
1435                 {
1436                     yaz_log(YLOG_LOG, "limitcluster in use for %s",
1437                             md->name);
1438                     break;
1439                 }
1440             }
1441             if (i == service->num_metadata)
1442             {
1443                 yaz_log(YLOG_WARN, "Target %s: limit %s used, but no limitmap defined",
1444                         (sdb->database ? sdb->database->id : "<no id>"), name);
1445             }
1446         }
1447     }
1448     nmem_destroy(nmem_tmp);
1449     return ret;
1450 }
1451
1452 // Parse the query given the settings specific to this client
1453 // client variable same_search is set as below as well as returned:
1454 // 0 if query is OK but different from before
1455 // 1 if query is OK but same as before
1456 // return -1 on query error
1457 // return -2 on limit error
1458 int client_parse_query(struct client *cl, const char *query,
1459                        facet_limits_t facet_limits, const char **error_msg)
1460 {
1461     struct session *se = client_get_session(cl);
1462     struct conf_service *service = se->service;
1463     struct session_database *sdb = client_get_database(cl);
1464     struct ccl_rpn_node *cn;
1465     int cerror, cpos;
1466     ODR odr_out;
1467     CCL_bibset ccl_map = prepare_cclmap(cl, service->ccl_bibset);
1468     const char *sru = session_setting_oneval(sdb, PZ_SRU);
1469     const char *pqf_prefix = session_setting_oneval(sdb, PZ_PQF_PREFIX);
1470     const char *pqf_strftime = session_setting_oneval(sdb, PZ_PQF_STRFTIME);
1471     const char *query_syntax = session_setting_oneval(sdb, PZ_QUERY_SYNTAX);
1472     WRBUF w_ccl, w_pqf;
1473     int ret_value = 1;
1474     Z_RPNQuery *zquery;
1475
1476     if (!ccl_map)
1477         return -3;
1478
1479     w_ccl = wrbuf_alloc();
1480     wrbuf_puts(w_ccl, query);
1481
1482     w_pqf = wrbuf_alloc();
1483     if (*pqf_prefix)
1484     {
1485         wrbuf_puts(w_pqf, pqf_prefix);
1486         wrbuf_puts(w_pqf, " ");
1487     }
1488
1489     if (apply_limit(sdb, facet_limits, w_pqf, ccl_map, service))
1490     {
1491         ccl_qual_rm(&ccl_map);
1492         return -2;
1493     }
1494
1495     facet_limits_destroy(cl->facet_limits);
1496     cl->facet_limits = facet_limits_dup(facet_limits);
1497
1498     yaz_log(YLOG_LOG, "Client %s: CCL query: %s limit: %s",
1499             client_get_id(cl), wrbuf_cstr(w_ccl), wrbuf_cstr(w_pqf));
1500     cn = ccl_find_str(ccl_map, wrbuf_cstr(w_ccl), &cerror, &cpos);
1501     ccl_qual_rm(&ccl_map);
1502     if (!cn)
1503     {
1504         if (error_msg)
1505             *error_msg = ccl_err_msg(cerror);
1506         client_set_state(cl, Client_Error);
1507         session_log(se, YLOG_WARN, "Client %s: Failed to parse CCL query '%s'",
1508                     client_get_id(cl),
1509                     wrbuf_cstr(w_ccl));
1510         wrbuf_destroy(w_ccl);
1511         wrbuf_destroy(w_pqf);
1512         return -1;
1513     }
1514     wrbuf_destroy(w_ccl);
1515
1516     if (!pqf_strftime || !*pqf_strftime)
1517         ccl_pquery(w_pqf, cn);
1518     else
1519     {
1520         time_t cur_time = time(0);
1521         struct tm *tm =  localtime(&cur_time);
1522         char tmp_str[300];
1523         const char *cp = tmp_str;
1524
1525         /* see man strftime(3) for things .. In particular %% gets converted
1526          to %.. And That's our original query .. */
1527         strftime(tmp_str, sizeof(tmp_str)-1, pqf_strftime, tm);
1528         for (; *cp; cp++)
1529         {
1530             if (cp[0] == '%')
1531                 ccl_pquery(w_pqf, cn);
1532             else
1533                 wrbuf_putc(w_pqf, cp[0]);
1534         }
1535     }
1536
1537     /* Compares query and limit with old one. If different we need to research */
1538     if (!cl->pquery || strcmp(cl->pquery, wrbuf_cstr(w_pqf)))
1539     {
1540         if (cl->pquery)
1541             session_log(se, YLOG_LOG, "Client %s: "
1542                         "Re-search due query/limit change: %s to %s",
1543                         client_get_id(cl), cl->pquery, wrbuf_cstr(w_pqf));
1544         xfree(cl->pquery);
1545         cl->pquery = xstrdup(wrbuf_cstr(w_pqf));
1546         // return value is no longer used.
1547         ret_value = 0;
1548         // Need to (re)search
1549         cl->same_search= 0;
1550     }
1551     wrbuf_destroy(w_pqf);
1552
1553     xfree(cl->cqlquery);
1554     cl->cqlquery = 0;
1555
1556     odr_out = odr_createmem(ODR_ENCODE);
1557     zquery = p_query_rpn(odr_out, cl->pquery);
1558     if (!zquery)
1559     {
1560
1561         session_log(se, YLOG_WARN, "Invalid PQF query for Client %s: %s",
1562                     client_get_id(cl), cl->pquery);
1563         ret_value = -1;
1564         *error_msg = "Invalid PQF after CCL to PQF conversion";
1565     }
1566     else
1567     {
1568         session_log(se, YLOG_LOG, "PQF for Client %s: %s",
1569                     client_get_id(cl), cl->pquery);
1570
1571         /* Support for PQF on SRU targets. */
1572         if (strcmp(query_syntax, "pqf") != 0 && *sru)
1573         {
1574             if (!strcmp(sru, "solr"))
1575                 cl->cqlquery = make_solrquery(cl, zquery);
1576             else
1577                 cl->cqlquery = make_cqlquery(cl, zquery);
1578             if (!cl->cqlquery)
1579             {
1580                 *error_msg = "Cannot convert PQF to Solr/CQL";
1581                 ret_value = -1;
1582             }
1583             else
1584                 session_log(se, YLOG_LOG, "Client %s native query: %s (%s)",
1585                             client_get_id(cl), cl->cqlquery, sru);
1586         }
1587     }
1588     odr_destroy(odr_out);
1589
1590     /* TODO FIX Not thread safe */
1591     if (!se->relevance)
1592     {
1593         // Initialize relevance structure with query terms
1594         se->relevance = relevance_create_ccl(se->service->charsets, cn,
1595                                              se->service->rank_cluster,
1596                                              se->service->rank_follow,
1597                                              se->service->rank_lead,
1598                                              se->service->rank_length);
1599     }
1600     ccl_rpn_delete(cn);
1601     return ret_value;
1602 }
1603
1604 int client_parse_sort(struct client *cl, struct reclist_sortparms *sp)
1605 {
1606     if (sp)
1607     {
1608         const char *sort_strategy_and_spec =
1609             get_strategy_plus_sort(cl, sp->name);
1610         int increasing = sp->increasing;
1611         if (!strcmp(sp->name, "relevance"))
1612             increasing = 1;
1613         if (sort_strategy_and_spec && strlen(sort_strategy_and_spec) < 40)
1614         {
1615             char strategy[50], *p;
1616             strcpy(strategy, sort_strategy_and_spec);
1617             p = strchr(strategy, ':');
1618             if (p)
1619             {
1620                 // Split the string in two
1621                 *p++ = 0;
1622                 while (*p == ' ')
1623                     p++;
1624                 if (increasing)
1625                     strcat(p, " <");
1626                 else
1627                     strcat(p, " >");
1628                 yaz_log(YLOG_LOG, "Client %s: "
1629                         "applying sorting %s %s", client_get_id(cl),
1630                         strategy, p);
1631                 if (!cl->sort_strategy || strcmp(cl->sort_strategy, strategy))
1632                     cl->same_search = 0;
1633                 if (!cl->sort_criteria || strcmp(cl->sort_criteria, p))
1634                     cl->same_search = 0;
1635                 if (cl->same_search == 0) {
1636                     xfree(cl->sort_strategy);
1637                     cl->sort_strategy = xstrdup(strategy);
1638                     xfree(cl->sort_criteria);
1639                     cl->sort_criteria = xstrdup(p);
1640                 }
1641             }
1642             else {
1643                 yaz_log(YLOG_LOG, "Client %s: "
1644                         "Invalid sort strategy and spec found %s",
1645                         client_get_id(cl), sort_strategy_and_spec);
1646                 xfree(cl->sort_strategy);
1647                 cl->sort_strategy  = 0;
1648                 xfree(cl->sort_criteria);
1649                 cl->sort_criteria = 0;
1650             }
1651         }
1652         else
1653         {
1654             yaz_log(YLOG_DEBUG, "Client %s: "
1655                     "No sort strategy and spec found.", client_get_id(cl));
1656             xfree(cl->sort_strategy);
1657             cl->sort_strategy  = 0;
1658             xfree(cl->sort_criteria);
1659             cl->sort_criteria = 0;
1660         }
1661
1662     }
1663     return !cl->same_search;
1664 }
1665
1666 void client_set_session(struct client *cl, struct session *se)
1667 {
1668     cl->session = se;
1669 }
1670
1671 int client_is_active(struct client *cl)
1672 {
1673     if (cl->connection && (cl->state == Client_Connecting ||
1674                            cl->state == Client_Working))
1675         return 1;
1676     return 0;
1677 }
1678
1679 int client_is_active_preferred(struct client *cl)
1680 {
1681     /* only count if this is a preferred target. */
1682     if (!cl->preferred)
1683         return 0;
1684     /* TODO No sure this the condition that Seb wants */
1685     if (cl->connection && (cl->state == Client_Connecting ||
1686                            cl->state == Client_Working))
1687         return 1;
1688     return 0;
1689 }
1690
1691 Odr_int client_get_hits(struct client *cl)
1692 {
1693     return cl->hits;
1694 }
1695
1696 Odr_int client_get_approximation(struct client *cl)
1697 {
1698     if (cl->record_offset > 0)
1699     {
1700         Odr_int approx = ((10 * cl->hits * (cl->record_offset - cl->filtered))
1701                           / cl->record_offset + 5) /10;
1702         yaz_log(YLOG_DEBUG, "%s: Approx: %lld * %d / %d = %lld ",
1703                 client_get_id(cl), cl->hits,
1704                 cl->record_offset - cl->filtered, cl->record_offset, approx);
1705         return approx;
1706     }
1707     return cl->hits;
1708 }
1709
1710 int client_get_num_records(struct client *cl, int *filtered, int *ingest,
1711                            int *failed)
1712 {
1713     if (filtered)
1714         *filtered = cl->filtered;
1715     if (ingest)
1716         *ingest = cl->ingest_failures;
1717     if (failed)
1718         *failed = cl->record_failures;
1719     return cl->record_offset;
1720 }
1721
1722 void client_set_diagnostic(struct client *cl, int diagnostic,
1723                            const char *message, const char *addinfo)
1724 {
1725     cl->diagnostic = diagnostic;
1726     xfree(cl->message);
1727     cl->message = xstrdup(message);
1728     xfree(cl->addinfo);
1729     cl->addinfo = 0;
1730     if (addinfo)
1731         cl->addinfo = xstrdup(addinfo);
1732 }
1733
1734 int client_get_diagnostic(struct client *cl, const char **message,
1735                           const char **addinfo)
1736 {
1737     if (message)
1738         *message = cl->message;
1739     if (addinfo)
1740         *addinfo = cl->addinfo;
1741     return cl->diagnostic;
1742 }
1743
1744 const char * client_get_suggestions_xml(struct client *cl, WRBUF wrbuf)
1745 {
1746     /* int idx; */
1747     struct suggestions *suggestions = cl->suggestions;
1748
1749     if (!suggestions)
1750         return "";
1751     if (suggestions->passthrough)
1752     {
1753         yaz_log(YLOG_DEBUG, "Passthrough Suggestions: \n%s\n",
1754                 suggestions->passthrough);
1755         return suggestions->passthrough;
1756     }
1757     if (suggestions->num == 0)
1758         return "";
1759     /*
1760     for (idx = 0; idx < suggestions->num; idx++) {
1761         wrbuf_printf(wrbuf, "<suggest term=\"%s\"", suggestions->suggest[idx]);
1762         if (suggestions->misspelled[idx] && suggestions->misspelled[idx]) {
1763             wrbuf_puts(wrbuf, suggestions->misspelled[idx]);
1764             wrbuf_puts(wrbuf, "</suggest>\n");
1765         }
1766         else
1767             wrbuf_puts(wrbuf, "/>\n");
1768     }
1769     */
1770     return wrbuf_cstr(wrbuf);
1771 }
1772
1773
1774 void client_set_database(struct client *cl, struct session_database *db)
1775 {
1776     cl->database = db;
1777 }
1778
1779 const char *client_get_id(struct client *cl)
1780 {
1781     return cl->id;
1782 }
1783
1784 int client_get_maxrecs(struct client *cl)
1785 {
1786     return cl->maxrecs;
1787 }
1788
1789 void client_set_preferred(struct client *cl, int v)
1790 {
1791     cl->preferred = v;
1792 }
1793
1794
1795 struct suggestions* client_suggestions_create(const char* suggestions_string)
1796 {
1797     int i;
1798     NMEM nmem;
1799     struct suggestions *suggestions;
1800     if (suggestions_string == 0 || suggestions_string[0] == 0 )
1801         return 0;
1802     nmem = nmem_create();
1803     suggestions = nmem_malloc(nmem, sizeof(*suggestions));
1804     yaz_log(YLOG_DEBUG, "client target suggestions: %s.", suggestions_string);
1805
1806     suggestions->nmem = nmem;
1807     suggestions->num = 0;
1808     suggestions->misspelled = 0;
1809     suggestions->suggest = 0;
1810     suggestions->passthrough = nmem_strdup_null(nmem, suggestions_string);
1811
1812     if (suggestions_string)
1813         nmem_strsplit_escape2(suggestions->nmem, "\n", suggestions_string, &suggestions->suggest,
1814                               &suggestions->num, 1, '\\', 0);
1815     /* Set up misspelled array */
1816     suggestions->misspelled = (char **)
1817         nmem_malloc(nmem, suggestions->num * sizeof(*suggestions->misspelled));
1818     /* replace = with \0 .. for each item */
1819     for (i = 0; i < suggestions->num; i++)
1820     {
1821         char *cp = strchr(suggestions->suggest[i], '=');
1822         if (cp) {
1823             *cp = '\0';
1824             suggestions->misspelled[i] = cp+1;
1825         }
1826     }
1827     return suggestions;
1828 }
1829
1830 static void client_suggestions_destroy(struct client *cl)
1831 {
1832     NMEM nmem = cl->suggestions->nmem;
1833     cl->suggestions = 0;
1834     nmem_destroy(nmem);
1835 }
1836
1837 /*
1838  * Local variables:
1839  * c-basic-offset: 4
1840  * c-file-style: "Stroustrup"
1841  * indent-tabs-mode: nil
1842  * End:
1843  * vim: shiftwidth=4 tabstop=8 expandtab
1844  */
1845