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 struct suggestions* client_suggestions_create(const char* suggestions_string);
 547 static void client_suggestions_destroy(struct client *cl);
 548
 549 void client_search_response(struct client *cl)
 550 {
 551     struct connection *co = cl->connection;
 552     ZOOM_connection link = connection_get_link(co);
 553     ZOOM_resultset resultset = cl->resultset;
 554     struct session *se = client_get_session(cl);
 555
 556     const char *error, *addinfo = 0;
 557
 558     if (ZOOM_connection_error(link, &error, &addinfo))
 559     {
 560         cl->hits = 0;
 561         session_log(se, YLOG_WARN, "%s: Error %s (%s)",
 562                     client_get_id(cl), error, addinfo);
 563         client_set_state(cl, Client_Error);
 564     }
 565     else
 566     {
 567         client_report_facets(cl, resultset);
 568         cl->record_offset = cl->startrecs;
 569         cl->hits = ZOOM_resultset_size(resultset);
 570         session_log(se, YLOG_LOG, "%s: hits: " ODR_INT_PRINTF,
 571                     client_get_id(cl), cl->hits);
 572         if (cl->suggestions)
 573             client_suggestions_destroy(cl);
 574         cl->suggestions =
 575             client_suggestions_create(ZOOM_resultset_option_get(
 576                                           resultset, "suggestions"));
 577     }
 578 }
 579
 580 void client_got_records(struct client *cl)
 581 {
 582     struct session *se = cl->session;
 583     if (se)
 584     {
 585         client_unlock(cl);
 586         /* TODO possible threading issue. Session can have been destroyed */
 587         if (session_is_preferred_clients_ready(se))
 588             session_alert_watch(se, SESSION_WATCH_SHOW_PREF);
 589         client_lock(cl);
 590         if (reclist_get_num_records(se->reclist) > 0)
 591         {
 592             client_unlock(cl);
 593             session_alert_watch(se, SESSION_WATCH_SHOW);
 594             session_alert_watch(se, SESSION_WATCH_BYTARGET);
 595             session_alert_watch(se, SESSION_WATCH_TERMLIST);
 596             session_alert_watch(se, SESSION_WATCH_RECORD);
 597             client_lock(cl);
 598         }
 599     }
 600 }
 601
 602 static void client_record_ingest(struct client *cl)
 603 {
 604     const char *msg, *addinfo;
 605     ZOOM_record rec = 0;
 606     ZOOM_resultset resultset = cl->resultset;
 607     struct session *se = client_get_session(cl);
 608     xmlDoc *xdoc;
 609     int offset = cl->record_offset + 1; /* 0 versus 1 numbered offsets */
 610
 611     xdoc = client_get_xdoc(cl, offset);
 612     if (xdoc)
 613     {
 614         if (cl->session)
 615         {
 616             NMEM nmem = nmem_create();
 617             int rc = ingest_xml_record(cl, xdoc, offset, nmem, 1);
 618             if (rc == -1)
 619             {
 620                 session_log(se, YLOG_WARN,
 621                             "%s: #%d: failed to ingest xdoc",
 622                             client_get_id(cl), offset);
 623                 cl->ingest_failures++;
 624             }
 625             else if (rc == -2)
 626                 cl->filtered++;
 627             nmem_destroy(nmem);
 628         }
 629     }
 630     else if ((rec = ZOOM_resultset_record_immediate(resultset,
 631                                                     cl->record_offset)))
 632     {
 633         if (cl->session == 0)
 634             ;  /* no operation */
 635         else if (ZOOM_record_error(rec, &msg, &addinfo, 0))
 636         {
 637             session_log(se, YLOG_WARN, "Record error %s (%s): %s #%d",
 638                         msg, addinfo, client_get_id(cl), offset);
 639             cl->record_failures++;
 640         }
 641         else
 642         {
 643             struct session_database *sdb = client_get_database(cl);
 644             NMEM nmem = nmem_create();
 645             const char *xmlrec;
 646             char type[80];
 647
 648             const char *s = session_setting_oneval(sdb, PZ_NATIVESYNTAX);
 649             if (nativesyntax_to_type(s, type, rec))
 650                 session_log(se, YLOG_WARN, "Failed to determine record type");
 651             xmlrec = ZOOM_record_get(rec, type, NULL);
 652             if (!xmlrec)
 653             {
 654                 const char *rec_syn =  ZOOM_record_get(rec, "syntax", NULL);
 655                 session_log(se, YLOG_WARN, "%s: #%d: ZOOM_record_get failed",
 656                             client_get_id(cl), offset);
 657                 session_log(se, YLOG_LOG, "pz:nativesyntax=%s . "
 658                             "ZOOM record type=%s . Actual record syntax=%s",
 659                             s ? s : "null", type,
 660                             rec_syn ? rec_syn : "null");
 661                 cl->ingest_failures++;
 662             }
 663             else
 664             {
 665                 /* OK = 0, -1 = failure, -2 = Filtered */
 666                 int rc = ingest_record(cl, xmlrec, offset, nmem);
 667                 if (rc == -1)
 668                 {
 669                     const char *rec_syn =  ZOOM_record_get(rec, "syntax", NULL);
 670                     session_log(se, YLOG_WARN,
 671                                 "%s: #%d: failed to ingest record",
 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 if (rc == -2)
 680                     cl->filtered++;
 681             }
 682             nmem_destroy(nmem);
 683         }
 684     }
 685     else
 686     {
 687         session_log(se, YLOG_WARN, "Got NULL record from %s #%d",
 688                     client_get_id(cl), offset);
 689     }
 690     cl->record_offset++;
 691 }
 692
 693 void client_record_response(struct client *cl, int *got_records)
 694 {
 695     struct connection *co = cl->connection;
 696     ZOOM_connection link = connection_get_link(co);
 697     ZOOM_resultset resultset = cl->resultset;
 698     const char *error, *addinfo;
 699
 700     if (ZOOM_connection_error(link, &error, &addinfo))
 701     {
 702         struct session *se = client_get_session(cl);
 703         session_log(se, YLOG_WARN, "%s: Error %s (%s)",
 704                     client_get_id(cl), error, addinfo);
 705         client_set_state(cl, Client_Error);
 706     }
 707     else
 708     {
 709         if (cl->show_raw && cl->show_raw->active)
 710         {
 711             ZOOM_record rec = 0;
 712             if ((rec = ZOOM_resultset_record_immediate(
 713                      resultset, cl->show_raw->position-1)))
 714             {
 715                 cl->show_raw->active = 0;
 716                 ingest_raw_record(cl, rec);
 717             }
 718             else
 719             {
 720                 yaz_log(YLOG_WARN, "Expected record, but got NULL, offset=%d",
 721                         cl->show_raw->position-1);
 722             }
 723         }
 724         else
 725         {
 726             client_record_ingest(cl);
 727             *got_records = 1;
 728         }
 729     }
 730 }
 731
 732 int client_reingest(struct client *cl)
 733 {
 734     int i = cl->startrecs;
 735     int to = cl->record_offset;
 736     cl->record_failures = cl->ingest_failures = cl->filtered = 0;
 737
 738     cl->record_offset = i;
 739     for (; i < to; i++)
 740         client_record_ingest(cl);
 741     return 0;
 742 }
 743
 744 static void client_set_facets_request(struct client *cl, ZOOM_connection link)
 745 {
 746     struct session_database *sdb = client_get_database(cl);
 747
 748     WRBUF w = wrbuf_alloc();
 749
 750     struct setting *s;
 751
 752     for (s = sdb->settings[PZ_FACETMAP]; s; s = s->next)
 753     {
 754         const char *p = strchr(s->name + 3, ':');
 755         if (!p)
 756         {
 757             yaz_log(YLOG_WARN, "Malformed facetmap name: %s", s->name);
 758         }
 759         else if (s->value && s->value[0])
 760         {
 761             wrbuf_puts(w, "@attr 1=");
 762             yaz_encode_pqf_term(w, s->value, strlen(s->value));
 763             if (s->next)
 764                 wrbuf_puts(w, ",");
 765         }
 766     }
 767     yaz_log(YLOG_DEBUG, "using facets str: %s", wrbuf_cstr(w));
 768     ZOOM_connection_option_set(link, "facets",
 769                                wrbuf_len(w) ? wrbuf_cstr(w) : 0);
 770     wrbuf_destroy(w);
 771 }
 772
 773 int client_has_facet(struct client *cl, const char *name)
 774 {
 775     struct session_database *sdb = client_get_database(cl);
 776     struct setting *s;
 777
 778     for (s = sdb->settings[PZ_FACETMAP]; s; s = s->next)
 779     {
 780         const char *p = strchr(s->name + 3, ':');
 781         if (p && !strcmp(name, p + 1))
 782             return 1;
 783     }
 784     return 0;
 785 }
 786
 787 static const char *get_strategy_plus_sort(struct client *l, const char *field)
 788 {
 789     struct session_database *sdb = client_get_database(l);
 790     struct setting *s;
 791
 792     const char *strategy_plus_sort = 0;
 793
 794     for (s = sdb->settings[PZ_SORTMAP]; s; s = s->next)
 795     {
 796         char *p = strchr(s->name + 3, ':');
 797         if (!p)
 798         {
 799             yaz_log(YLOG_WARN, "Malformed sortmap name: %s", s->name);
 800             continue;
 801         }
 802         p++;
 803         if (!strcmp(p, field))
 804         {
 805             strategy_plus_sort = s->value;
 806             break;
 807         }
 808     }
 809     return strategy_plus_sort;
 810 }
 811
 812 void client_update_show_stat(struct client *cl, int cmd)
 813 {
 814     if (cmd == 0)
 815         cl->show_stat_no = 0;
 816     else if (cmd == 1)
 817         cl->show_stat_no++;
 818 }
 819
 820 int client_fetch_more(struct client *cl)
 821 {
 822     struct session_database *sdb = client_get_database(cl);
 823     const char *str;
 824     int extend_recs = 0;
 825     int number = cl->hits - cl->record_offset;
 826
 827     str = session_setting_oneval(sdb, PZ_EXTENDRECS);
 828     if (!str || !*str)
 829         return 0;
 830
 831     extend_recs = atoi(str);
 832
 833     yaz_log(YLOG_LOG, "cl=%s show_stat_no=%d got=%d",
 834             client_get_id(cl), cl->show_stat_no, cl->record_offset);
 835     if (cl->show_stat_no < cl->record_offset)
 836         return 0;
 837     yaz_log(YLOG_LOG, "cl=%s Trying to fetch more", client_get_id(cl));
 838
 839     if (number > extend_recs)
 840         number = extend_recs;
 841     if (number > 0)
 842     {
 843         ZOOM_resultset set = cl->resultset;
 844         struct connection *co = client_get_connection(cl);
 845
 846         str = session_setting_oneval(sdb, PZ_REQUESTSYNTAX);
 847         ZOOM_resultset_option_set(set, "preferredRecordSyntax", str);
 848         str = session_setting_oneval(sdb, PZ_ELEMENTS);
 849         if (str && *str)
 850             ZOOM_resultset_option_set(set, "elementSetName", str);
 851
 852         ZOOM_resultset_records(set, 0, cl->record_offset, number);
 853         client_set_state(cl, Client_Working);
 854         connection_continue(co);
 855         return 1;
 856     }
 857     else
 858     {
 859         yaz_log(YLOG_LOG, "cl=%s. OK no more in total set", client_get_id(cl));
 860     }
 861     return 0;
 862 }
 863
 864 int client_parse_init(struct client *cl, int same_search)
 865 {
 866     cl->same_search = same_search;
 867     return 0;
 868 }
 869
 870 /*
 871  * TODO consider how to extend the range
 872  * */
 873 int client_parse_range(struct client *cl, const char *startrecs,
 874                        const char *maxrecs)
 875 {
 876     if (maxrecs && atoi(maxrecs) != cl->maxrecs)
 877     {
 878         cl->same_search = 0;
 879         cl->maxrecs = atoi(maxrecs);
 880     }
 881
 882     if (startrecs && atoi(startrecs) != cl->startrecs)
 883     {
 884         cl->same_search = 0;
 885         cl->startrecs = atoi(startrecs);
 886     }
 887
 888     return 0;
 889 }
 890
 891 int client_start_search(struct client *cl)
 892 {
 893     struct session_database *sdb = client_get_database(cl);
 894     struct connection *co = 0;
 895     ZOOM_connection link = 0;
 896     struct session *se = client_get_session(cl);
 897     ZOOM_resultset rs;
 898     const char *opt_piggyback   = session_setting_oneval(sdb, PZ_PIGGYBACK);
 899     const char *opt_queryenc    = session_setting_oneval(sdb, PZ_QUERYENCODING);
 900     const char *opt_elements    = session_setting_oneval(sdb, PZ_ELEMENTS);
 901     const char *opt_requestsyn  = session_setting_oneval(sdb, PZ_REQUESTSYNTAX);
 902     const char *opt_maxrecs     = session_setting_oneval(sdb, PZ_MAXRECS);
 903     const char *opt_sru         = session_setting_oneval(sdb, PZ_SRU);
 904     const char *opt_sort        = session_setting_oneval(sdb, PZ_SORT);
 905     const char *opt_preferred   = session_setting_oneval(sdb, PZ_PREFERRED);
 906     const char *extra_args      = session_setting_oneval(sdb, PZ_EXTRA_ARGS);
 907     const char *opt_present_chunk = session_setting_oneval(sdb, PZ_PRESENT_CHUNK);
 908     const char *opt_timeout     = session_setting_oneval(sdb, PZ_TIMEOUT);
 909     ZOOM_query query;
 910     char maxrecs_str[24], startrecs_str[24], present_chunk_str[24];
 911     struct timeval tval;
 912     int present_chunk = 20; // Default chunk size
 913     int rc_prep_connection;
 914     int operation_timeout = se->service->z3950_operation_timeout;
 915
 916     cl->diagnostic = 0;
 917     cl->record_failures = cl->ingest_failures = cl->filtered = 0;
 918
 919     yaz_gettimeofday(&tval);
 920     tval.tv_sec += 5;
 921
 922     if (opt_timeout && *opt_timeout)
 923         operation_timeout = atoi(opt_timeout);
 924
 925     if (opt_present_chunk && strcmp(opt_present_chunk,"")) {
 926         present_chunk = atoi(opt_present_chunk);
 927         yaz_log(YLOG_DEBUG, "Present chunk set to %d", present_chunk);
 928     }
 929     rc_prep_connection =
 930         client_prep_connection(cl, operation_timeout,
 931                                se->service->z3950_session_timeout,
 932                                se->service->server->iochan_man,
 933                                &tval);
 934     /* Nothing has changed and we already have a result */
 935     if (cl->same_search == 1 && rc_prep_connection == 2)
 936     {
 937         session_log(se, YLOG_LOG, "%s: reuse result", client_get_id(cl));
 938         client_report_facets(cl, cl->resultset);
 939         return client_reingest(cl);
 940     }
 941     else if (!rc_prep_connection)
 942     {
 943         session_log(se, YLOG_LOG, "%s: postponing search: No connection",
 944                     client_get_id(cl));
 945         client_set_state_nb(cl, Client_Working);
 946         return -1;
 947     }
 948     co = client_get_connection(cl);
 949     assert(cl);
 950     link = connection_get_link(co);
 951     assert(link);
 952
 953     session_log(se, YLOG_LOG, "%s: new search", client_get_id(cl));
 954
 955     client_destroy_xdoc(cl);
 956     client_init_xdoc(cl);
 957
 958     if (extra_args && *extra_args)
 959         ZOOM_connection_option_set(link, "extraArgs", extra_args);
 960
 961     if (opt_preferred) {
 962         cl->preferred = atoi(opt_preferred);
 963         if (cl->preferred)
 964             yaz_log(YLOG_LOG, "Target %s has preferred status: %d",
 965                     client_get_id(cl), cl->preferred);
 966     }
 967
 968     if (*opt_piggyback)
 969         ZOOM_connection_option_set(link, "piggyback", opt_piggyback);
 970     else
 971         ZOOM_connection_option_set(link, "piggyback", "1");
 972     if (*opt_queryenc)
 973         ZOOM_connection_option_set(link, "rpnCharset", opt_queryenc);
 974     if (*opt_sru && *opt_elements)
 975         ZOOM_connection_option_set(link, "schema", opt_elements);
 976     else if (*opt_elements)
 977         ZOOM_connection_option_set(link, "elementSetName", opt_elements);
 978     if (*opt_requestsyn)
 979         ZOOM_connection_option_set(link, "preferredRecordSyntax", opt_requestsyn);
 980
 981     if (opt_maxrecs && *opt_maxrecs)
 982     {
 983         cl->maxrecs = atoi(opt_maxrecs);
 984     }
 985
 986     /* convert back to string representation used in ZOOM API */
 987     sprintf(maxrecs_str, "%d", cl->maxrecs);
 988     ZOOM_connection_option_set(link, "count", maxrecs_str);
 989
 990     /* A present_chunk less than 1 will disable chunking. */
 991     if (present_chunk > 0 && cl->maxrecs > present_chunk) {
 992         sprintf(present_chunk_str, "%d", present_chunk);
 993         ZOOM_connection_option_set(link, "presentChunk", present_chunk_str);
 994         yaz_log(YLOG_DEBUG, "Present chunk set to %s", present_chunk_str);
 995     }
 996     else {
 997         ZOOM_connection_option_set(link, "presentChunk", maxrecs_str);
 998         yaz_log(YLOG_DEBUG, "Present chunk set to %s (maxrecs)", maxrecs_str);
 999     }
1000     sprintf(startrecs_str, "%d", cl->startrecs);
1001     ZOOM_connection_option_set(link, "start", startrecs_str);
1002
1003     /* TODO Verify does it break something for CQL targets(non-SOLR) ? */
1004     /* facets definition is in PQF */
1005     client_set_facets_request(cl, link);
1006
1007     query = ZOOM_query_create();
1008     if (cl->cqlquery)
1009     {
1010         session_log(se, YLOG_LOG, "%s: Search CQL: %s", client_get_id(cl),
1011                     cl->cqlquery);
1012         ZOOM_query_cql(query, cl->cqlquery);
1013         if (*opt_sort)
1014             ZOOM_query_sortby(query, opt_sort);
1015     }
1016     else
1017     {
1018         session_log(se, YLOG_LOG, "%s: Search PQF: %s", client_get_id(cl),
1019                     cl->pquery);
1020         ZOOM_query_prefix(query, cl->pquery);
1021     }
1022     if (cl->sort_strategy && cl->sort_criteria) {
1023         yaz_log(YLOG_LOG, "Client %s: "
1024                 "Set ZOOM sort strategy and criteria: %s %s",
1025                 client_get_id(cl), cl->sort_strategy, cl->sort_criteria);
1026         ZOOM_query_sortby2(query, cl->sort_strategy, cl->sort_criteria);
1027     }
1028
1029     yaz_log(YLOG_DEBUG,"Client %s: Starting search", client_get_id(cl));
1030     client_set_state(cl, Client_Working);
1031     cl->hits = 0;
1032     cl->record_offset = 0;
1033     rs = ZOOM_connection_search(link, query);
1034     ZOOM_query_destroy(query);
1035     ZOOM_resultset_destroy(cl->resultset);
1036     cl->resultset = rs;
1037     connection_continue(co);
1038     return 0;
1039 }
1040
1041 struct client *client_create(const char *id)
1042 {
1043     struct client *cl = xmalloc(sizeof(*cl));
1044     cl->maxrecs = 100;
1045     cl->startrecs = 0;
1046     cl->pquery = 0;
1047     cl->cqlquery = 0;
1048     cl->addinfo = 0;
1049     cl->message = 0;
1050     cl->database = 0;
1051     cl->connection = 0;
1052     cl->session = 0;
1053     cl->hits = 0;
1054     cl->record_offset = 0;
1055     cl->filtered = 0;
1056     cl->diagnostic = 0;
1057     cl->state = Client_Disconnected;
1058     cl->show_raw = 0;
1059     cl->resultset = 0;
1060     cl->suggestions = 0;
1061     cl->mutex = 0;
1062     pazpar2_mutex_create(&cl->mutex, "client");
1063     cl->preferred = 0;
1064     cl->ref_count = 1;
1065     cl->facet_limits = 0;
1066     cl->sort_strategy = 0;
1067     cl->sort_criteria = 0;
1068     assert(id);
1069     cl->id = xstrdup(id);
1070     client_init_xdoc(cl);
1071     client_use(1);
1072
1073     yaz_log(YLOG_DEBUG, "client_create c=%p %s", cl, id);
1074     return cl;
1075 }
1076
1077 void client_lock(struct client *c)
1078 {
1079     yaz_mutex_enter(c->mutex);
1080 }
1081
1082 void client_unlock(struct client *c)
1083 {
1084     yaz_mutex_leave(c->mutex);
1085 }
1086
1087 void client_incref(struct client *c)
1088 {
1089     pazpar2_incref(&c->ref_count, c->mutex);
1090     yaz_log(YLOG_DEBUG, "client_incref c=%p %s cnt=%d",
1091             c, client_get_id(c), c->ref_count);
1092 }
1093
1094 int client_destroy(struct client *c)
1095 {
1096     if (c)
1097     {
1098         yaz_log(YLOG_DEBUG, "client_destroy c=%p %s cnt=%d",
1099                 c, client_get_id(c), c->ref_count);
1100         if (!pazpar2_decref(&c->ref_count, c->mutex))
1101         {
1102             xfree(c->pquery);
1103             c->pquery = 0;
1104             xfree(c->cqlquery);
1105             c->cqlquery = 0;
1106             xfree(c->addinfo);
1107             c->addinfo = 0;
1108             xfree(c->message);
1109             c->message = 0;
1110             xfree(c->id);
1111             xfree(c->sort_strategy);
1112             xfree(c->sort_criteria);
1113             assert(!c->connection);
1114             facet_limits_destroy(c->facet_limits);
1115
1116             client_destroy_xdoc(c);
1117             if (c->resultset)
1118             {
1119                 ZOOM_resultset_destroy(c->resultset);
1120             }
1121             yaz_mutex_destroy(&c->mutex);
1122             xfree(c);
1123             client_use(-1);
1124             return 1;
1125         }
1126     }
1127     return 0;
1128 }
1129
1130 void client_set_connection(struct client *cl, struct connection *con)
1131 {
1132     if (cl->resultset)
1133         ZOOM_resultset_release(cl->resultset);
1134     if (con)
1135     {
1136         assert(cl->connection == 0);
1137         cl->connection = con;
1138         client_incref(cl);
1139     }
1140     else
1141     {
1142         client_lock(cl);
1143         cl->connection = con;
1144         client_unlock(cl);
1145         client_destroy(cl);
1146     }
1147 }
1148
1149 void client_disconnect(struct client *cl)
1150 {
1151     if (cl->state != Client_Idle)
1152         client_set_state(cl, Client_Disconnected);
1153     client_set_connection(cl, 0);
1154 }
1155
1156 void client_stop(struct client *cl)
1157 {
1158     client_lock(cl);
1159     if (cl->state == Client_Working || cl->state == Client_Connecting)
1160     {
1161         yaz_log(YLOG_LOG, "client_stop: %s release", client_get_id(cl));
1162         if (cl->connection)
1163         {
1164             connection_release2(cl->connection);
1165             assert(cl->ref_count > 1);
1166             cl->ref_count--;
1167             cl->connection = 0;
1168         }
1169         cl->state = Client_Disconnected;
1170     }
1171     else
1172         yaz_log(YLOG_LOG, "client_stop: %s ignore", client_get_id(cl));
1173     client_unlock(cl);
1174 }
1175
1176 // Initialize CCL map for a target
1177 static CCL_bibset prepare_cclmap(struct client *cl, CCL_bibset base_bibset)
1178 {
1179     struct session_database *sdb = client_get_database(cl);
1180     struct setting *s;
1181     CCL_bibset res;
1182
1183     if (!sdb->settings)
1184         return 0;
1185     if (base_bibset)
1186         res = ccl_qual_dup(base_bibset);
1187     else
1188         res = ccl_qual_mk();
1189     for (s = sdb->settings[PZ_CCLMAP]; s; s = s->next)
1190     {
1191         const char *addinfo = 0;
1192         char *p = strchr(s->name + 3, ':');
1193         if (!p)
1194         {
1195             WRBUF w = wrbuf_alloc();
1196             wrbuf_printf(w, "Malformed cclmap. name=%s", s->name);
1197             yaz_log(YLOG_WARN, "%s: %s", client_get_id(cl), wrbuf_cstr(w));
1198             client_set_diagnostic(cl, ZOOM_ERROR_CCL_CONFIG,
1199                                   ZOOM_diag_str(ZOOM_ERROR_CCL_CONFIG),
1200                                   wrbuf_cstr(w));
1201             client_set_state_nb(cl, Client_Error);
1202             ccl_qual_rm(&res);
1203             wrbuf_destroy(w);
1204             return 0;
1205         }
1206         p++;
1207         if (ccl_qual_fitem2(res, s->value, p, &addinfo))
1208         {
1209             WRBUF w = wrbuf_alloc();
1210
1211             wrbuf_printf(w, "Malformed cclmap. name=%s: value=%s (%s)",
1212                          s->name, p, addinfo);
1213             yaz_log(YLOG_WARN, "%s: %s", client_get_id(cl), wrbuf_cstr(w));
1214             client_set_diagnostic(cl, ZOOM_ERROR_CCL_CONFIG,
1215                                   ZOOM_diag_str(ZOOM_ERROR_CCL_CONFIG),
1216                                   wrbuf_cstr(w));
1217             client_set_state_nb(cl, Client_Error);
1218             ccl_qual_rm(&res);
1219             wrbuf_destroy(w);
1220             return 0;
1221         }
1222     }
1223     return res;
1224 }
1225
1226 // returns a xmalloced CQL query corresponding to the pquery in client
1227 static char *make_cqlquery(struct client *cl, Z_RPNQuery *zquery)
1228 {
1229     cql_transform_t cqlt = cql_transform_create();
1230     char *r = 0;
1231     WRBUF wrb = wrbuf_alloc();
1232     int status;
1233
1234     if ((status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery)))
1235     {
1236         yaz_log(YLOG_WARN, "Failed to generate CQL query, code=%d", status);
1237     }
1238     else
1239     {
1240         r = xstrdup(wrbuf_cstr(wrb));
1241     }
1242     wrbuf_destroy(wrb);
1243     cql_transform_close(cqlt);
1244     return r;
1245 }
1246
1247 // returns a xmalloced SOLR query corresponding to the pquery in client
1248 // TODO Could prob. be merge with the similar make_cqlquery
1249 static char *make_solrquery(struct client *cl, Z_RPNQuery *zquery)
1250 {
1251     solr_transform_t sqlt = solr_transform_create();
1252     char *r = 0;
1253     WRBUF wrb = wrbuf_alloc();
1254     int status;
1255
1256     if ((status = solr_transform_rpn2solr_wrbuf(sqlt, wrb, zquery)))
1257     {
1258         yaz_log(YLOG_WARN, "Failed to generate SOLR query, code=%d", status);
1259     }
1260     else
1261     {
1262         r = xstrdup(wrbuf_cstr(wrb));
1263     }
1264     wrbuf_destroy(wrb);
1265     solr_transform_close(sqlt);
1266     return r;
1267 }
1268
1269 const char *client_get_facet_limit_local(struct client *cl,
1270                                          struct session_database *sdb,
1271                                          int *l,
1272                                          NMEM nmem, int *num, char ***values)
1273 {
1274     const char *name = 0;
1275     const char *value = 0;
1276     for (; (name = facet_limits_get(cl->facet_limits, *l, &value)); (*l)++)
1277     {
1278         struct setting *s = 0;
1279
1280         for (s = sdb->settings[PZ_LIMITMAP]; s; s = s->next)
1281         {
1282             const char *p = strchr(s->name + 3, ':');
1283             if (p && !strcmp(p + 1, name) && s->value)
1284             {
1285                 int j, cnum;
1286                 char **cvalues;
1287                 nmem_strsplit_escape2(nmem, ",", s->value, &cvalues,
1288                                       &cnum, 1, '\\', 1);
1289                 for (j = 0; j < cnum; j++)
1290                 {
1291                     const char *cvalue = cvalues[j];
1292                     while (*cvalue == ' ')
1293                         cvalue++;
1294                     if (!strncmp(cvalue, "local:", 6))
1295                     {
1296                         const char *cp = cvalue + 6;
1297                         while (*cp == ' ')
1298                             cp++;
1299                         nmem_strsplit_escape2(nmem, "|", value, values,
1300                                               num, 1, '\\', 1);
1301                         (*l)++;
1302                         return *cp ? cp : name;
1303                     }
1304                 }
1305             }
1306         }
1307     }
1308     return 0;
1309 }
1310
1311 static int apply_limit(struct session_database *sdb,
1312                        facet_limits_t facet_limits,
1313                        WRBUF w_pqf, CCL_bibset ccl_map,
1314                        struct conf_service *service)
1315 {
1316     int ret = 0;
1317     int i = 0;
1318     const char *name;
1319     const char *value;
1320
1321     NMEM nmem_tmp = nmem_create();
1322     for (i = 0; (name = facet_limits_get(facet_limits, i, &value)); i++)
1323     {
1324         struct setting *s = 0;
1325         nmem_reset(nmem_tmp);
1326         /* name="pz:limitmap:author" value="rpn:@attr 1=4|local:other" */
1327         for (s = sdb->settings[PZ_LIMITMAP]; s; s = s->next)
1328         {
1329             const char *p = strchr(s->name + 3, ':');
1330             if (p && !strcmp(p + 1, name) && s->value)
1331             {
1332                 char **values = 0;
1333                 int i, num = 0;
1334                 char **cvalues = 0;
1335                 int j, cnum = 0;
1336                 nmem_strsplit_escape2(nmem_tmp, "|", value, &values,
1337                                       &num, 1, '\\', 1);
1338
1339                 nmem_strsplit_escape2(nmem_tmp, ",", s->value, &cvalues,
1340                                       &cnum, 1, '\\', 1);
1341
1342                 for (j = 0; ret == 0 && j < cnum; j++)
1343                 {
1344                     const char *cvalue = cvalues[j];
1345                     while (*cvalue == ' ')
1346                         cvalue++;
1347                     if (!strncmp(cvalue, "rpn:", 4))
1348                     {
1349                         const char *pqf = cvalue + 4;
1350                         wrbuf_puts(w_pqf, "@and ");
1351                         wrbuf_puts(w_pqf, pqf);
1352                         wrbuf_puts(w_pqf, " ");
1353                         for (i = 0; i < num; i++)
1354                         {
1355                             if (i < num - 1)
1356                                 wrbuf_puts(w_pqf, "@or ");
1357                             yaz_encode_pqf_term(w_pqf, values[i],
1358                                                 strlen(values[i]));
1359                         }
1360                     }
1361                     else if (!strncmp(cvalue, "ccl:", 4))
1362                     {
1363                         const char *ccl = cvalue + 4;
1364                         WRBUF ccl_w = wrbuf_alloc();
1365                         for (i = 0; i < num; i++)
1366                         {
1367                             int cerror, cpos;
1368                             struct ccl_rpn_node *cn;
1369                             wrbuf_rewind(ccl_w);
1370                             wrbuf_puts(ccl_w, ccl);
1371                             wrbuf_putc(ccl_w, '=');
1372                             if (strchr(values[i], ' '))
1373                                 wrbuf_putc(ccl_w, '\"');
1374                             wrbuf_puts(ccl_w, values[i]);
1375                             if (strchr(values[i], ' '))
1376                                 wrbuf_putc(ccl_w, '\"');
1377                             cn = ccl_find_str(ccl_map, wrbuf_cstr(ccl_w),
1378                                               &cerror, &cpos);
1379                             if (cn)
1380                             {
1381                                 if (i == 0)
1382                                     wrbuf_printf(w_pqf, "@and ");
1383
1384                                 /* or multiple values.. could be bad if last
1385                                    CCL parse fails, but this is unlikely to
1386                                    happen */
1387                                 if (i < num - 1)
1388                                     wrbuf_printf(w_pqf, "@or ");
1389                                 ccl_pquery(w_pqf, cn);
1390                                 ccl_rpn_delete(cn);
1391                             }
1392                         }
1393                         wrbuf_destroy(ccl_w);
1394                     }
1395                     else if (!strncmp(cvalue, "local:", 6)) {
1396                         /* no operation */
1397                     }
1398                     else
1399                     {
1400                         yaz_log(YLOG_WARN, "Target %s: Bad limitmap '%s'",
1401                                 sdb->database->id, cvalue);
1402                         ret = -1; /* bad limitmap */
1403                     }
1404                 }
1405                 break;
1406             }
1407         }
1408         if (!s)
1409         {
1410             int i;
1411             for (i = 0; i < service->num_metadata; i++)
1412             {
1413                 struct conf_metadata *md = service->metadata + i;
1414                 if (!strcmp(md->name, name) && md->limitcluster)
1415                 {
1416                     yaz_log(YLOG_LOG, "limitcluster in use for %s",
1417                             md->name);
1418                     break;
1419                 }
1420             }
1421             if (i == service->num_metadata)
1422             {
1423                 yaz_log(YLOG_WARN, "Target %s: limit %s used, but no limitmap defined",
1424                         (sdb->database ? sdb->database->id : "<no id>"), name);
1425             }
1426         }
1427     }
1428     nmem_destroy(nmem_tmp);
1429     return ret;
1430 }
1431
1432 // Parse the query given the settings specific to this client
1433 // client variable same_search is set as below as well as returned:
1434 // 0 if query is OK but different from before
1435 // 1 if query is OK but same as before
1436 // return -1 on query error
1437 // return -2 on limit error
1438 int client_parse_query(struct client *cl, const char *query,
1439                        facet_limits_t facet_limits, const char **error_msg)
1440 {
1441     struct session *se = client_get_session(cl);
1442     struct conf_service *service = se->service;
1443     struct session_database *sdb = client_get_database(cl);
1444     struct ccl_rpn_node *cn;
1445     int cerror, cpos;
1446     ODR odr_out;
1447     CCL_bibset ccl_map = prepare_cclmap(cl, service->ccl_bibset);
1448     const char *sru = session_setting_oneval(sdb, PZ_SRU);
1449     const char *pqf_prefix = session_setting_oneval(sdb, PZ_PQF_PREFIX);
1450     const char *pqf_strftime = session_setting_oneval(sdb, PZ_PQF_STRFTIME);
1451     const char *query_syntax = session_setting_oneval(sdb, PZ_QUERY_SYNTAX);
1452     WRBUF w_ccl, w_pqf;
1453     int ret_value = 1;
1454     Z_RPNQuery *zquery;
1455
1456     if (!ccl_map)
1457         return -3;
1458
1459     w_ccl = wrbuf_alloc();
1460     wrbuf_puts(w_ccl, query);
1461
1462     w_pqf = wrbuf_alloc();
1463     if (*pqf_prefix)
1464     {
1465         wrbuf_puts(w_pqf, pqf_prefix);
1466         wrbuf_puts(w_pqf, " ");
1467     }
1468
1469     if (apply_limit(sdb, facet_limits, w_pqf, ccl_map, service))
1470     {
1471         ccl_qual_rm(&ccl_map);
1472         return -2;
1473     }
1474
1475     facet_limits_destroy(cl->facet_limits);
1476     cl->facet_limits = facet_limits_dup(facet_limits);
1477
1478     yaz_log(YLOG_LOG, "Client %s: CCL query: %s limit: %s",
1479             client_get_id(cl), wrbuf_cstr(w_ccl), wrbuf_cstr(w_pqf));
1480     cn = ccl_find_str(ccl_map, wrbuf_cstr(w_ccl), &cerror, &cpos);
1481     ccl_qual_rm(&ccl_map);
1482     if (!cn)
1483     {
1484         if (error_msg)
1485             *error_msg = ccl_err_msg(cerror);
1486         client_set_state(cl, Client_Error);
1487         session_log(se, YLOG_WARN, "Client %s: Failed to parse CCL query '%s'",
1488                     client_get_id(cl),
1489                     wrbuf_cstr(w_ccl));
1490         wrbuf_destroy(w_ccl);
1491         wrbuf_destroy(w_pqf);
1492         return -1;
1493     }
1494     wrbuf_destroy(w_ccl);
1495
1496     if (!pqf_strftime || !*pqf_strftime)
1497         ccl_pquery(w_pqf, cn);
1498     else
1499     {
1500         time_t cur_time = time(0);
1501         struct tm *tm =  localtime(&cur_time);
1502         char tmp_str[300];
1503         const char *cp = tmp_str;
1504
1505         /* see man strftime(3) for things .. In particular %% gets converted
1506          to %.. And That's our original query .. */
1507         strftime(tmp_str, sizeof(tmp_str)-1, pqf_strftime, tm);
1508         for (; *cp; cp++)
1509         {
1510             if (cp[0] == '%')
1511                 ccl_pquery(w_pqf, cn);
1512             else
1513                 wrbuf_putc(w_pqf, cp[0]);
1514         }
1515     }
1516
1517     /* Compares query and limit with old one. If different we need to research */
1518     if (!cl->pquery || strcmp(cl->pquery, wrbuf_cstr(w_pqf)))
1519     {
1520         if (cl->pquery)
1521             session_log(se, YLOG_LOG, "Client %s: "
1522                         "Re-search due query/limit change: %s to %s",
1523                         client_get_id(cl), cl->pquery, wrbuf_cstr(w_pqf));
1524         xfree(cl->pquery);
1525         cl->pquery = xstrdup(wrbuf_cstr(w_pqf));
1526         // return value is no longer used.
1527         ret_value = 0;
1528         // Need to (re)search
1529         cl->same_search= 0;
1530     }
1531     wrbuf_destroy(w_pqf);
1532
1533     xfree(cl->cqlquery);
1534     cl->cqlquery = 0;
1535
1536     odr_out = odr_createmem(ODR_ENCODE);
1537     zquery = p_query_rpn(odr_out, cl->pquery);
1538     if (!zquery)
1539     {
1540
1541         session_log(se, YLOG_WARN, "Invalid PQF query for Client %s: %s",
1542                     client_get_id(cl), cl->pquery);
1543         ret_value = -1;
1544         *error_msg = "Invalid PQF after CCL to PQF conversion";
1545     }
1546     else
1547     {
1548         session_log(se, YLOG_LOG, "PQF for Client %s: %s",
1549                     client_get_id(cl), cl->pquery);
1550
1551         /* Support for PQF on SRU targets. */
1552         if (strcmp(query_syntax, "pqf") != 0 && *sru)
1553         {
1554             if (!strcmp(sru, "solr"))
1555                 cl->cqlquery = make_solrquery(cl, zquery);
1556             else
1557                 cl->cqlquery = make_cqlquery(cl, zquery);
1558             if (!cl->cqlquery)
1559             {
1560                 *error_msg = "Cannot convert PQF to Solr/CQL";
1561                 ret_value = -1;
1562             }
1563             else
1564                 session_log(se, YLOG_LOG, "Client %s native query: %s (%s)",
1565                             client_get_id(cl), cl->cqlquery, sru);
1566         }
1567     }
1568     odr_destroy(odr_out);
1569
1570     /* TODO FIX Not thread safe */
1571     if (!se->relevance)
1572     {
1573         // Initialize relevance structure with query terms
1574         se->relevance = relevance_create_ccl(se->service->charsets, cn,
1575                                              se->service->rank_cluster,
1576                                              se->service->rank_follow,
1577                                              se->service->rank_lead,
1578                                              se->service->rank_length);
1579     }
1580     ccl_rpn_delete(cn);
1581     return ret_value;
1582 }
1583
1584 int client_parse_sort(struct client *cl, struct reclist_sortparms *sp)
1585 {
1586     if (sp)
1587     {
1588         const char *sort_strategy_and_spec =
1589             get_strategy_plus_sort(cl, sp->name);
1590         int increasing = sp->increasing;
1591         if (!strcmp(sp->name, "relevance"))
1592             increasing = 1;
1593         if (sort_strategy_and_spec && strlen(sort_strategy_and_spec) < 40)
1594         {
1595             char strategy[50], *p;
1596             strcpy(strategy, sort_strategy_and_spec);
1597             p = strchr(strategy, ':');
1598             if (p)
1599             {
1600                 // Split the string in two
1601                 *p++ = 0;
1602                 while (*p == ' ')
1603                     p++;
1604                 if (increasing)
1605                     strcat(p, " <");
1606                 else
1607                     strcat(p, " >");
1608                 yaz_log(YLOG_LOG, "Client %s: "
1609                         "applying sorting %s %s", client_get_id(cl),
1610                         strategy, p);
1611                 if (!cl->sort_strategy || strcmp(cl->sort_strategy, strategy))
1612                     cl->same_search = 0;
1613                 if (!cl->sort_criteria || strcmp(cl->sort_criteria, p))
1614                     cl->same_search = 0;
1615                 if (cl->same_search == 0) {
1616                     xfree(cl->sort_strategy);
1617                     cl->sort_strategy = xstrdup(strategy);
1618                     xfree(cl->sort_criteria);
1619                     cl->sort_criteria = xstrdup(p);
1620                 }
1621             }
1622             else {
1623                 yaz_log(YLOG_LOG, "Client %s: "
1624                         "Invalid sort strategy and spec found %s",
1625                         client_get_id(cl), sort_strategy_and_spec);
1626                 xfree(cl->sort_strategy);
1627                 cl->sort_strategy  = 0;
1628                 xfree(cl->sort_criteria);
1629                 cl->sort_criteria = 0;
1630             }
1631         }
1632         else
1633         {
1634             yaz_log(YLOG_DEBUG, "Client %s: "
1635                     "No sort strategy and spec found.", client_get_id(cl));
1636             xfree(cl->sort_strategy);
1637             cl->sort_strategy  = 0;
1638             xfree(cl->sort_criteria);
1639             cl->sort_criteria = 0;
1640         }
1641
1642     }
1643     return !cl->same_search;
1644 }
1645
1646 void client_set_session(struct client *cl, struct session *se)
1647 {
1648     cl->session = se;
1649 }
1650
1651 int client_is_active(struct client *cl)
1652 {
1653     if (cl->connection && (cl->state == Client_Connecting ||
1654                            cl->state == Client_Working))
1655         return 1;
1656     return 0;
1657 }
1658
1659 int client_is_active_preferred(struct client *cl)
1660 {
1661     /* only count if this is a preferred target. */
1662     if (!cl->preferred)
1663         return 0;
1664     /* TODO No sure this the condition that Seb wants */
1665     if (cl->connection && (cl->state == Client_Connecting ||
1666                            cl->state == Client_Working))
1667         return 1;
1668     return 0;
1669 }
1670
1671 Odr_int client_get_hits(struct client *cl)
1672 {
1673     return cl->hits;
1674 }
1675
1676 Odr_int client_get_approximation(struct client *cl)
1677 {
1678     if (cl->record_offset > 0)
1679     {
1680         Odr_int approx = ((10 * cl->hits * (cl->record_offset - cl->filtered))
1681                           / cl->record_offset + 5) /10;
1682         yaz_log(YLOG_DEBUG, "%s: Approx: %lld * %d / %d = %lld ",
1683                 client_get_id(cl), cl->hits,
1684                 cl->record_offset - cl->filtered, cl->record_offset, approx);
1685         return approx;
1686     }
1687     return cl->hits;
1688 }
1689
1690 int client_get_num_records(struct client *cl, int *filtered, int *ingest,
1691                            int *failed)
1692 {
1693     if (filtered)
1694         *filtered = cl->filtered;
1695     if (ingest)
1696         *ingest = cl->ingest_failures;
1697     if (failed)
1698         *failed = cl->record_failures;
1699     return cl->record_offset;
1700 }
1701
1702 void client_set_diagnostic(struct client *cl, int diagnostic,
1703                            const char *message, const char *addinfo)
1704 {
1705     cl->diagnostic = diagnostic;
1706     xfree(cl->message);
1707     cl->message = xstrdup(message);
1708     xfree(cl->addinfo);
1709     cl->addinfo = 0;
1710     if (addinfo)
1711         cl->addinfo = xstrdup(addinfo);
1712 }
1713
1714 int client_get_diagnostic(struct client *cl, const char **message,
1715                           const char **addinfo)
1716 {
1717     if (message)
1718         *message = cl->message;
1719     if (addinfo)
1720         *addinfo = cl->addinfo;
1721     return cl->diagnostic;
1722 }
1723
1724 const char * client_get_suggestions_xml(struct client *cl, WRBUF wrbuf)
1725 {
1726     /* int idx; */
1727     struct suggestions *suggestions = cl->suggestions;
1728
1729     if (!suggestions)
1730         return "";
1731     if (suggestions->passthrough)
1732     {
1733         yaz_log(YLOG_DEBUG, "Passthrough Suggestions: \n%s\n",
1734                 suggestions->passthrough);
1735         return suggestions->passthrough;
1736     }
1737     if (suggestions->num == 0)
1738         return "";
1739     /*
1740     for (idx = 0; idx < suggestions->num; idx++) {
1741         wrbuf_printf(wrbuf, "<suggest term=\"%s\"", suggestions->suggest[idx]);
1742         if (suggestions->misspelled[idx] && suggestions->misspelled[idx]) {
1743             wrbuf_puts(wrbuf, suggestions->misspelled[idx]);
1744             wrbuf_puts(wrbuf, "</suggest>\n");
1745         }
1746         else
1747             wrbuf_puts(wrbuf, "/>\n");
1748     }
1749     */
1750     return wrbuf_cstr(wrbuf);
1751 }
1752
1753
1754 void client_set_database(struct client *cl, struct session_database *db)
1755 {
1756     cl->database = db;
1757 }
1758
1759 const char *client_get_id(struct client *cl)
1760 {
1761     return cl->id;
1762 }
1763
1764 int client_get_maxrecs(struct client *cl)
1765 {
1766     return cl->maxrecs;
1767 }
1768
1769 void client_set_preferred(struct client *cl, int v)
1770 {
1771     cl->preferred = v;
1772 }
1773
1774
1775 struct suggestions* client_suggestions_create(const char* suggestions_string)
1776 {
1777     int i;
1778     NMEM nmem;
1779     struct suggestions *suggestions;
1780     if (suggestions_string == 0 || suggestions_string[0] == 0 )
1781         return 0;
1782     nmem = nmem_create();
1783     suggestions = nmem_malloc(nmem, sizeof(*suggestions));
1784     yaz_log(YLOG_DEBUG, "client target suggestions: %s.", suggestions_string);
1785
1786     suggestions->nmem = nmem;
1787     suggestions->num = 0;
1788     suggestions->misspelled = 0;
1789     suggestions->suggest = 0;
1790     suggestions->passthrough = nmem_strdup_null(nmem, suggestions_string);
1791
1792     if (suggestions_string)
1793         nmem_strsplit_escape2(suggestions->nmem, "\n", suggestions_string, &suggestions->suggest,
1794                               &suggestions->num, 1, '\\', 0);
1795     /* Set up misspelled array */
1796     suggestions->misspelled = (char **)
1797         nmem_malloc(nmem, suggestions->num * sizeof(*suggestions->misspelled));
1798     /* replace = with \0 .. for each item */
1799     for (i = 0; i < suggestions->num; i++)
1800     {
1801         char *cp = strchr(suggestions->suggest[i], '=');
1802         if (cp) {
1803             *cp = '\0';
1804             suggestions->misspelled[i] = cp+1;
1805         }
1806     }
1807     return suggestions;
1808 }
1809
1810 static void client_suggestions_destroy(struct client *cl)
1811 {
1812     NMEM nmem = cl->suggestions->nmem;
1813     cl->suggestions = 0;
1814     nmem_destroy(nmem);
1815 }
1816
1817 /*
1818  * Local variables:
1819  * c-basic-offset: 4
1820  * c-file-style: "Stroustrup"
1821  * indent-tabs-mode: nil
1822  * End:
1823  * vim: shiftwidth=4 tabstop=8 expandtab
1824  */
1825