src/pazpar2.c

   1 /* $Id: pazpar2.c,v 1.72 2007-04-11 13:27:06 quinn Exp $
   2    Copyright (c) 2006-2007, Index Data.
   3
   4 This file is part of Pazpar2.
   5
   6 Pazpar2 is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 2, or (at your option) any later
   9 version.
  10
  11 Pazpar2 is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with Pazpar2; see the file LICENSE.  If not, write to the
  18 Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  19 02111-1307, USA.
  20  */
  21
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <sys/time.h>
  26 #include <unistd.h>
  27 #include <sys/socket.h>
  28 #include <netdb.h>
  29 #include <signal.h>
  30 #include <ctype.h>
  31 #include <assert.h>
  32
  33 #include <yaz/marcdisp.h>
  34 #include <yaz/comstack.h>
  35 #include <yaz/tcpip.h>
  36 #include <yaz/proto.h>
  37 #include <yaz/readconf.h>
  38 #include <yaz/pquery.h>
  39 #include <yaz/otherinfo.h>
  40 #include <yaz/yaz-util.h>
  41 #include <yaz/nmem.h>
  42
  43 #if HAVE_CONFIG_H
  44 #include "cconfig.h"
  45 #endif
  46
  47 #define USE_TIMING 0
  48 #if USE_TIMING
  49 #include <yaz/timing.h>
  50 #endif
  51
  52 #include <netinet/in.h>
  53
  54 #include "pazpar2.h"
  55 #include "eventl.h"
  56 #include "http.h"
  57 #include "termlists.h"
  58 #include "reclists.h"
  59 #include "relevance.h"
  60 #include "config.h"
  61 #include "database.h"
  62 #include "settings.h"
  63
  64 #define MAX_CHUNK 15
  65
  66 static void client_fatal(struct client *cl);
  67 static void connection_destroy(struct connection *co);
  68 static int client_prep_connection(struct client *cl);
  69 static void ingest_records(struct client *cl, Z_Records *r);
  70 void session_alert_watch(struct session *s, int what);
  71 char *session_setting_oneval(struct session_database *db, int offset);
  72
  73 IOCHAN channel_list = 0;  // Master list of connections we're handling events to
  74
  75 static struct connection *connection_freelist = 0;
  76 static struct client *client_freelist = 0;
  77
  78 static char *client_states[] = {
  79     "Client_Connecting",
  80     "Client_Connected",
  81     "Client_Idle",
  82     "Client_Initializing",
  83     "Client_Searching",
  84     "Client_Presenting",
  85     "Client_Error",
  86     "Client_Failed",
  87     "Client_Disconnected",
  88     "Client_Stopped"
  89 };
  90
  91 // Note: Some things in this structure will eventually move to configuration
  92 struct parameters global_parameters =
  93 {
  94     "",
  95     "",
  96     "",
  97     "",
  98     0,
  99     0,
 100     30,
 101     "81",
 102     "Index Data PazPar2 (MasterKey)",
 103     VERSION,
 104     600, // 10 minutes
 105     60,
 106     100,
 107     MAX_CHUNK,
 108     0,
 109     0
 110 };
 111
 112 static int send_apdu(struct client *c, Z_APDU *a)
 113 {
 114     struct connection *co = c->connection;
 115     char *buf;
 116     int len, r;
 117
 118     if (!z_APDU(global_parameters.odr_out, &a, 0, 0))
 119     {
 120         odr_perror(global_parameters.odr_out, "Encoding APDU");
 121         abort();
 122     }
 123     buf = odr_getbuf(global_parameters.odr_out, &len, 0);
 124     r = cs_put(co->link, buf, len);
 125     if (r < 0)
 126     {
 127         yaz_log(YLOG_WARN, "cs_put: %s", cs_errmsg(cs_errno(co->link)));
 128         return -1;
 129     }
 130     else if (r == 1)
 131     {
 132         fprintf(stderr, "cs_put incomplete (ParaZ does not handle that)\n");
 133         exit(1);
 134     }
 135     odr_reset(global_parameters.odr_out); /* release the APDU structure  */
 136     co->state = Conn_Waiting;
 137     return 0;
 138 }
 139
 140 // Set authentication token in init if one is set for the client
 141 // TODO: Extend this to handle other schemes than open (should be simple)
 142 static void init_authentication(struct client *cl, Z_InitRequest *req)
 143 {
 144     struct session_database *sdb = cl->database;
 145     char *auth = session_setting_oneval(sdb, PZ_AUTHENTICATION);
 146
 147     if (auth)
 148     {
 149         Z_IdAuthentication *idAuth = odr_malloc(global_parameters.odr_out,
 150                 sizeof(*idAuth));
 151         idAuth->which = Z_IdAuthentication_open;
 152         idAuth->u.open = auth;
 153         req->idAuthentication = idAuth;
 154     }
 155 }
 156
 157 static void send_init(IOCHAN i)
 158 {
 159
 160     struct connection *co = iochan_getdata(i);
 161     struct client *cl = co->client;
 162     Z_APDU *a = zget_APDU(global_parameters.odr_out, Z_APDU_initRequest);
 163
 164     a->u.initRequest->implementationId = global_parameters.implementationId;
 165     a->u.initRequest->implementationName = global_parameters.implementationName;
 166     a->u.initRequest->implementationVersion =
 167         global_parameters.implementationVersion;
 168     ODR_MASK_SET(a->u.initRequest->options, Z_Options_search);
 169     ODR_MASK_SET(a->u.initRequest->options, Z_Options_present);
 170     ODR_MASK_SET(a->u.initRequest->options, Z_Options_namedResultSets);
 171
 172     ODR_MASK_SET(a->u.initRequest->protocolVersion, Z_ProtocolVersion_1);
 173     ODR_MASK_SET(a->u.initRequest->protocolVersion, Z_ProtocolVersion_2);
 174     ODR_MASK_SET(a->u.initRequest->protocolVersion, Z_ProtocolVersion_3);
 175
 176     init_authentication(cl, a->u.initRequest);
 177
 178     /* add virtual host if tunneling through Z39.50 proxy */
 179
 180     if (0 < strlen(global_parameters.zproxy_override)
 181         && 0 < strlen(cl->database->database->url))
 182         yaz_oi_set_string_oidval(&a->u.initRequest->otherInfo,
 183                                  global_parameters.odr_out, VAL_PROXY,
 184                                  1, cl->database->database->url);
 185
 186     if (send_apdu(cl, a) >= 0)
 187     {
 188         iochan_setflags(i, EVENT_INPUT);
 189         cl->state = Client_Initializing;
 190     }
 191     else
 192         cl->state = Client_Error;
 193     odr_reset(global_parameters.odr_out);
 194 }
 195
 196 static void pull_terms(NMEM nmem, struct ccl_rpn_node *n, char **termlist, int *num)
 197 {
 198     switch (n->kind)
 199     {
 200         case CCL_RPN_AND:
 201         case CCL_RPN_OR:
 202         case CCL_RPN_NOT:
 203         case CCL_RPN_PROX:
 204             pull_terms(nmem, n->u.p[0], termlist, num);
 205             pull_terms(nmem, n->u.p[1], termlist, num);
 206             break;
 207         case CCL_RPN_TERM:
 208             termlist[(*num)++] = nmem_strdup(nmem, n->u.t.term);
 209             break;
 210         default: // NOOP
 211             break;
 212     }
 213 }
 214
 215 // Extract terms from query into null-terminated termlist
 216 static void extract_terms(NMEM nmem, struct ccl_rpn_node *query, char **termlist)
 217 {
 218     int num = 0;
 219
 220     pull_terms(nmem, query, termlist, &num);
 221     termlist[num] = 0;
 222 }
 223
 224 static void send_search(IOCHAN i)
 225 {
 226     struct connection *co = iochan_getdata(i);
 227     struct client *cl = co->client;
 228     struct session *se = cl->session;
 229     struct session_database *sdb = cl->database;
 230     Z_APDU *a = zget_APDU(global_parameters.odr_out, Z_APDU_searchRequest);
 231     int ndb, cerror, cpos;
 232     char **databaselist;
 233     Z_Query *zquery;
 234     struct ccl_rpn_node *cn;
 235     int ssub = 0, lslb = 100000, mspn = 10;
 236     char *recsyn;
 237     char *piggyback;
 238
 239     yaz_log(YLOG_DEBUG, "Sending search");
 240
 241     cn = ccl_find_str(sdb->database->ccl_map, se->query, &cerror, &cpos);
 242     if (!cn)
 243         return;
 244
 245     if (!se->relevance)
 246     {
 247         // Initialize relevance structure with query terms
 248         char *p[512];
 249         extract_terms(se->nmem, cn, p);
 250         se->relevance = relevance_create(se->nmem, (const char **) p,
 251                 se->expected_maxrecs);
 252     }
 253
 254     a->u.searchRequest->query = zquery = odr_malloc(global_parameters.odr_out,
 255             sizeof(Z_Query));
 256     zquery->which = Z_Query_type_1;
 257     zquery->u.type_1 = ccl_rpn_query(global_parameters.odr_out, cn);
 258     ccl_rpn_delete(cn);
 259
 260     for (ndb = 0; sdb->database->databases[ndb]; ndb++)
 261         ;
 262     databaselist = odr_malloc(global_parameters.odr_out, sizeof(char*) * ndb);
 263     for (ndb = 0; sdb->database->databases[ndb]; ndb++)
 264         databaselist[ndb] = sdb->database->databases[ndb];
 265
 266     if (!(piggyback = session_setting_oneval(sdb, PZ_PIGGYBACK)) || *piggyback == '1')
 267     {
 268         if ((recsyn = session_setting_oneval(sdb, PZ_REQUESTSYNTAX)))
 269             a->u.searchRequest->preferredRecordSyntax =
 270                     yaz_str_to_z3950oid(global_parameters.odr_out,
 271                     CLASS_RECSYN, recsyn);
 272         a->u.searchRequest->smallSetUpperBound = &ssub;
 273         a->u.searchRequest->largeSetLowerBound = &lslb;
 274         a->u.searchRequest->mediumSetPresentNumber = &mspn;
 275     }
 276     a->u.searchRequest->resultSetName = "Default";
 277     a->u.searchRequest->databaseNames = databaselist;
 278     a->u.searchRequest->num_databaseNames = ndb;
 279
 280     if (send_apdu(cl, a) >= 0)
 281     {
 282         iochan_setflags(i, EVENT_INPUT);
 283         cl->state = Client_Searching;
 284         cl->requestid = se->requestid;
 285     }
 286     else
 287         cl->state = Client_Error;
 288
 289     odr_reset(global_parameters.odr_out);
 290 }
 291
 292 static void send_present(IOCHAN i)
 293 {
 294     struct connection *co = iochan_getdata(i);
 295     struct client *cl = co->client;
 296     struct session_database *sdb = cl->database;
 297     Z_APDU *a = zget_APDU(global_parameters.odr_out, Z_APDU_presentRequest);
 298     int toget;
 299     int start = cl->records + 1;
 300     char *recsyn;
 301
 302     toget = global_parameters.chunk;
 303     if (toget > global_parameters.toget - cl->records)
 304         toget = global_parameters.toget - cl->records;
 305     if (toget > cl->hits - cl->records)
 306         toget = cl->hits - cl->records;
 307
 308     yaz_log(YLOG_DEBUG, "Trying to present %d records\n", toget);
 309
 310     a->u.presentRequest->resultSetStartPoint = &start;
 311     a->u.presentRequest->numberOfRecordsRequested = &toget;
 312
 313     a->u.presentRequest->resultSetId = "Default";
 314
 315     if ((recsyn = session_setting_oneval(sdb, PZ_REQUESTSYNTAX)))
 316         a->u.presentRequest->preferredRecordSyntax =
 317                 yaz_str_to_z3950oid(global_parameters.odr_out,
 318                 CLASS_RECSYN, recsyn);
 319
 320     if (send_apdu(cl, a) >= 0)
 321     {
 322         iochan_setflags(i, EVENT_INPUT);
 323         cl->state = Client_Presenting;
 324     }
 325     else
 326         cl->state = Client_Error;
 327     odr_reset(global_parameters.odr_out);
 328 }
 329
 330 static void do_initResponse(IOCHAN i, Z_APDU *a)
 331 {
 332     struct connection *co = iochan_getdata(i);
 333     struct client *cl = co->client;
 334     Z_InitResponse *r = a->u.initResponse;
 335
 336     yaz_log(YLOG_DEBUG, "Init response %s", cl->database->database->url);
 337
 338     if (*r->result)
 339     {
 340         cl->state = Client_Idle;
 341     }
 342     else
 343         cl->state = Client_Failed; // FIXME need to do something to the connection
 344 }
 345
 346 static void do_searchResponse(IOCHAN i, Z_APDU *a)
 347 {
 348     struct connection *co = iochan_getdata(i);
 349     struct client *cl = co->client;
 350     struct session *se = cl->session;
 351     Z_SearchResponse *r = a->u.searchResponse;
 352
 353     yaz_log(YLOG_DEBUG, "Search response %s (status=%d)",
 354             cl->database->database->url, *r->searchStatus);
 355
 356     if (*r->searchStatus)
 357     {
 358         cl->hits = *r->resultCount;
 359         se->total_hits += cl->hits;
 360         if (r->presentStatus && !*r->presentStatus && r->records)
 361         {
 362             yaz_log(YLOG_DEBUG, "Records in search response %s",
 363                     cl->database->database->url);
 364             ingest_records(cl, r->records);
 365         }
 366         cl->state = Client_Idle;
 367     }
 368     else
 369     {          /*"FAILED"*/
 370         cl->hits = 0;
 371         cl->state = Client_Error;
 372         if (r->records) {
 373             Z_Records *recs = r->records;
 374             if (recs->which == Z_Records_NSD)
 375             {
 376                 yaz_log(YLOG_WARN,
 377                         "Search response: Non-surrogate diagnostic %s",
 378                         cl->database->database->url);
 379                 cl->diagnostic = *recs->u.nonSurrogateDiagnostic->condition;
 380                 cl->state = Client_Error;
 381             }
 382         }
 383     }
 384 }
 385
 386 static void do_closeResponse(IOCHAN i, Z_APDU *a)
 387 {
 388     struct connection *co = iochan_getdata(i);
 389     struct client *cl = co->client;
 390     /* Z_Close *r = a->u.close; */
 391
 392     yaz_log(YLOG_WARN, "Close response %s", cl->database->database->url);
 393
 394     cl->state = Client_Failed;
 395     connection_destroy(co);
 396 }
 397
 398
 399 char *normalize_mergekey(char *buf, int skiparticle)
 400 {
 401     char *p = buf, *pout = buf;
 402
 403     if (skiparticle)
 404     {
 405         char firstword[64];
 406         char articles[] = "the den der die des an a "; // must end in space
 407
 408         while (*p && !isalnum(*p))
 409             p++;
 410         pout = firstword;
 411         while (*p && *p != ' ' && pout - firstword < 62)
 412             *(pout++) = tolower(*(p++));
 413         *(pout++) = ' ';
 414         *(pout++) = '\0';
 415         if (!strstr(articles, firstword))
 416             p = buf;
 417         pout = buf;
 418     }
 419
 420     while (*p)
 421     {
 422         while (*p && !isalnum(*p))
 423             p++;
 424         while (isalnum(*p))
 425             *(pout++) = tolower(*(p++));
 426         if (*p)
 427             *(pout++) = ' ';
 428         while (*p && !isalnum(*p))
 429             p++;
 430     }
 431     if (buf != pout)
 432         do {
 433             *(pout--) = '\0';
 434         }
 435         while (pout > buf && *pout == ' ');
 436
 437     return buf;
 438 }
 439
 440 static void add_facet(struct session *s, const char *type, const char *value)
 441 {
 442     int i;
 443
 444     if (!*value)
 445         return;
 446     for (i = 0; i < s->num_termlists; i++)
 447         if (!strcmp(s->termlists[i].name, type))
 448             break;
 449     if (i == s->num_termlists)
 450     {
 451         if (i == SESSION_MAX_TERMLISTS)
 452         {
 453             yaz_log(YLOG_FATAL, "Too many termlists");
 454             exit(1);
 455         }
 456         s->termlists[i].name = nmem_strdup(s->nmem, type);
 457         s->termlists[i].termlist = termlist_create(s->nmem, s->expected_maxrecs, 15);
 458         s->num_termlists = i + 1;
 459     }
 460     termlist_insert(s->termlists[i].termlist, value);
 461 }
 462
 463 static xmlDoc *normalize_record(struct client *cl, Z_External *rec)
 464 {
 465     struct database_retrievalmap *m;
 466     struct database *db = cl->database->database;
 467     xmlNode *res;
 468     xmlDoc *rdoc;
 469
 470     // First normalize to XML
 471     if (db->yaz_marc)
 472     {
 473         char *buf;
 474         int len;
 475         if (rec->which != Z_External_octet)
 476         {
 477             yaz_log(YLOG_WARN, "Unexpected external branch, probably BER %s",
 478                     cl->database->database->url);
 479             return 0;
 480         }
 481         buf = (char*) rec->u.octet_aligned->buf;
 482         len = rec->u.octet_aligned->len;
 483         if (yaz_marc_read_iso2709(db->yaz_marc, buf, len) < 0)
 484         {
 485             yaz_log(YLOG_WARN, "Failed to decode MARC %s",
 486                     cl->database->database->url);
 487             return 0;
 488         }
 489         if (yaz_marc_write_xml(db->yaz_marc, &res,
 490                     "http://www.loc.gov/MARC21/slim", 0, 0) < 0)
 491         {
 492             yaz_log(YLOG_WARN, "Failed to encode as XML %s",
 493                     cl->database->database->url);
 494             return 0;
 495         }
 496         rdoc = xmlNewDoc((xmlChar *) "1.0");
 497         xmlDocSetRootElement(rdoc, res);
 498     }
 499     else
 500     {
 501         yaz_log(YLOG_FATAL, "Unknown native_syntax in normalize_record");
 502         exit(1);
 503     }
 504
 505     if (global_parameters.dump_records)
 506     {
 507         fprintf(stderr, "Input Record (normalized):\n----------------\n");
 508 #if LIBXML_VERSION >= 20600
 509         xmlDocFormatDump(stderr, rdoc, 1);
 510 #else
 511         xmlDocDump(stderr, rdoc);
 512 #endif
 513     }
 514
 515     for (m = db->map; m; m = m->next)
 516     {
 517         xmlDoc *new;
 518         if (!(new = xsltApplyStylesheet(m->stylesheet, rdoc, 0)))
 519         {
 520             yaz_log(YLOG_WARN, "XSLT transformation failed");
 521             return 0;
 522         }
 523         xmlFreeDoc(rdoc);
 524         rdoc = new;
 525     }
 526     if (global_parameters.dump_records)
 527     {
 528         fprintf(stderr, "Record:\n----------------\n");
 529 #if LIBXML_VERSION >= 20600
 530         xmlDocFormatDump(stderr, rdoc, 1);
 531 #else
 532         xmlDocDump(stderr, rdoc);
 533 #endif
 534     }
 535     return rdoc;
 536 }
 537
 538 // Extract what appears to be years from buf, storing highest and
 539 // lowest values.
 540 static int extract_years(const char *buf, int *first, int *last)
 541 {
 542     *first = -1;
 543     *last = -1;
 544     while (*buf)
 545     {
 546         const char *e;
 547         int len;
 548
 549         while (*buf && !isdigit(*buf))
 550             buf++;
 551         len = 0;
 552         for (e = buf; *e && isdigit(*e); e++)
 553             len++;
 554         if (len == 4)
 555         {
 556             int value = atoi(buf);
 557             if (*first < 0 || value < *first)
 558                 *first = value;
 559             if (*last < 0 || value > *last)
 560                 *last = value;
 561         }
 562         buf = e;
 563     }
 564     return *first;
 565 }
 566
 567 static struct record *ingest_record(struct client *cl, Z_External *rec)
 568 {
 569     xmlDoc *xdoc = normalize_record(cl, rec);
 570     xmlNode *root, *n;
 571     struct record *res;
 572     struct record_cluster *cluster;
 573     struct session *se = cl->session;
 574     xmlChar *mergekey, *mergekey_norm;
 575     xmlChar *type = 0;
 576     xmlChar *value = 0;
 577     struct conf_service *service = global_parameters.server->service;
 578
 579     if (!xdoc)
 580         return 0;
 581
 582     root = xmlDocGetRootElement(xdoc);
 583     if (!(mergekey = xmlGetProp(root, (xmlChar *) "mergekey")))
 584     {
 585         yaz_log(YLOG_WARN, "No mergekey found in record");
 586         xmlFreeDoc(xdoc);
 587         return 0;
 588     }
 589
 590     res = nmem_malloc(se->nmem, sizeof(struct record));
 591     res->next = 0;
 592     res->client = cl;
 593     res->metadata = nmem_malloc(se->nmem,
 594             sizeof(struct record_metadata*) * service->num_metadata);
 595     memset(res->metadata, 0, sizeof(struct record_metadata*) * service->num_metadata);
 596
 597     mergekey_norm = (xmlChar *) nmem_strdup(se->nmem, (char*) mergekey);
 598     xmlFree(mergekey);
 599     normalize_mergekey((char *) mergekey_norm, 0);
 600
 601     cluster = reclist_insert(se->reclist, res, (char *) mergekey_norm,
 602                              &se->total_merged);
 603     if (global_parameters.dump_records)
 604         yaz_log(YLOG_LOG, "Cluster id %d from %s (#%d)", cluster->recid,
 605                 cl->database->database->url, cl->records);
 606     if (!cluster)
 607     {
 608         /* no room for record */
 609         xmlFreeDoc(xdoc);
 610         return 0;
 611     }
 612     relevance_newrec(se->relevance, cluster);
 613
 614     for (n = root->children; n; n = n->next)
 615     {
 616         if (type)
 617             xmlFree(type);
 618         if (value)
 619             xmlFree(value);
 620         type = value = 0;
 621
 622         if (n->type != XML_ELEMENT_NODE)
 623             continue;
 624         if (!strcmp((const char *) n->name, "metadata"))
 625         {
 626             struct conf_metadata *md = 0;
 627             struct conf_sortkey *sk = 0;
 628             struct record_metadata **wheretoput, *newm;
 629             int imeta;
 630             int first, last;
 631
 632             type = xmlGetProp(n, (xmlChar *) "type");
 633             value = xmlNodeListGetString(xdoc, n->children, 0);
 634
 635             if (!type || !value)
 636                 continue;
 637
 638             // First, find out what field we're looking at
 639             for (imeta = 0; imeta < service->num_metadata; imeta++)
 640                 if (!strcmp((const char *) type, service->metadata[imeta].name))
 641                 {
 642                     md = &service->metadata[imeta];
 643                     if (md->sortkey_offset >= 0)
 644                         sk = &service->sortkeys[md->sortkey_offset];
 645                     break;
 646                 }
 647             if (!md)
 648             {
 649                 yaz_log(YLOG_WARN, "Ignoring unknown metadata element: %s", type);
 650                 continue;
 651             }
 652
 653             // Find out where we are putting it
 654             if (md->merge == Metadata_merge_no)
 655                 wheretoput = &res->metadata[imeta];
 656             else
 657                 wheretoput = &cluster->metadata[imeta];
 658
 659             // Put it there
 660             newm = nmem_malloc(se->nmem, sizeof(struct record_metadata));
 661             newm->next = 0;
 662             if (md->type == Metadata_type_generic)
 663             {
 664                 char *p, *pe;
 665                 for (p = (char *) value; *p && isspace(*p); p++)
 666                     ;
 667                 for (pe = p + strlen(p) - 1;
 668                         pe > p && strchr(" ,/.:([", *pe); pe--)
 669                     *pe = '\0';
 670                 newm->data.text = nmem_strdup(se->nmem, p);
 671
 672             }
 673             else if (md->type == Metadata_type_year)
 674             {
 675                 if (extract_years((char *) value, &first, &last) < 0)
 676                     continue;
 677             }
 678             else
 679             {
 680                 yaz_log(YLOG_WARN, "Unknown type in metadata element %s", type);
 681                 continue;
 682             }
 683             if (md->type == Metadata_type_year && md->merge != Metadata_merge_range)
 684             {
 685                 yaz_log(YLOG_WARN, "Only range merging supported for years");
 686                 continue;
 687             }
 688             if (md->merge == Metadata_merge_unique)
 689             {
 690                 struct record_metadata *mnode;
 691                 for (mnode = *wheretoput; mnode; mnode = mnode->next)
 692                     if (!strcmp((const char *) mnode->data.text, newm->data.text))
 693                         break;
 694                 if (!mnode)
 695                 {
 696                     newm->next = *wheretoput;
 697                     *wheretoput = newm;
 698                 }
 699             }
 700             else if (md->merge == Metadata_merge_longest)
 701             {
 702                 if (!*wheretoput ||
 703                         strlen(newm->data.text) > strlen((*wheretoput)->data.text))
 704                 {
 705                     *wheretoput = newm;
 706                     if (sk)
 707                     {
 708                         char *s = nmem_strdup(se->nmem, newm->data.text);
 709                         if (!cluster->sortkeys[md->sortkey_offset])
 710                             cluster->sortkeys[md->sortkey_offset] =
 711                                 nmem_malloc(se->nmem, sizeof(union data_types));
 712                         normalize_mergekey(s,
 713                                 (sk->type == Metadata_sortkey_skiparticle));
 714                         cluster->sortkeys[md->sortkey_offset]->text = s;
 715                     }
 716                 }
 717             }
 718             else if (md->merge == Metadata_merge_all || md->merge == Metadata_merge_no)
 719             {
 720                 newm->next = *wheretoput;
 721                 *wheretoput = newm;
 722             }
 723             else if (md->merge == Metadata_merge_range)
 724             {
 725                 assert(md->type == Metadata_type_year);
 726                 if (!*wheretoput)
 727                 {
 728                     *wheretoput = newm;
 729                     (*wheretoput)->data.number.min = first;
 730                     (*wheretoput)->data.number.max = last;
 731                     if (sk)
 732                         cluster->sortkeys[md->sortkey_offset] = &newm->data;
 733                 }
 734                 else
 735                 {
 736                     if (first < (*wheretoput)->data.number.min)
 737                         (*wheretoput)->data.number.min = first;
 738                     if (last > (*wheretoput)->data.number.max)
 739                         (*wheretoput)->data.number.max = last;
 740                 }
 741 #ifdef GAGA
 742                 if (sk)
 743                 {
 744                     union data_types *sdata = cluster->sortkeys[md->sortkey_offset];
 745                     yaz_log(YLOG_LOG, "SK range: %d-%d", sdata->number.min, sdata->number.max);
 746                 }
 747 #endif
 748             }
 749             else
 750                 yaz_log(YLOG_WARN, "Don't know how to merge on element name %s", md->name);
 751
 752             if (md->rank)
 753                 relevance_countwords(se->relevance, cluster,
 754                                      (char *) value, md->rank);
 755             if (md->termlist)
 756             {
 757                 if (md->type == Metadata_type_year)
 758                 {
 759                     char year[64];
 760                     sprintf(year, "%d", last);
 761                     add_facet(se, (char *) type, year);
 762                     if (first != last)
 763                     {
 764                         sprintf(year, "%d", first);
 765                         add_facet(se, (char *) type, year);
 766                     }
 767                 }
 768                 else
 769                     add_facet(se, (char *) type, (char *) value);
 770             }
 771             xmlFree(type);
 772             xmlFree(value);
 773             type = value = 0;
 774         }
 775         else
 776             yaz_log(YLOG_WARN, "Unexpected element %s in internal record", n->name);
 777     }
 778     if (type)
 779         xmlFree(type);
 780     if (value)
 781         xmlFree(value);
 782
 783     xmlFreeDoc(xdoc);
 784
 785     relevance_donerecord(se->relevance, cluster);
 786     se->total_records++;
 787
 788     return res;
 789 }
 790
 791 // Retrieve first defined value for 'name' for given database.
 792 // Will be extended to take into account user associated with session
 793 char *session_setting_oneval(struct session_database *db, int offset)
 794 {
 795     if (!db->settings[offset])
 796         return 0;
 797     return db->settings[offset]->value;
 798 }
 799
 800 static void ingest_records(struct client *cl, Z_Records *r)
 801 {
 802 #if USE_TIMING
 803     yaz_timing_t t = yaz_timing_create();
 804 #endif
 805     struct record *rec;
 806     struct session *s = cl->session;
 807     Z_NamePlusRecordList *rlist;
 808     int i;
 809
 810     if (r->which != Z_Records_DBOSD)
 811         return;
 812     rlist = r->u.databaseOrSurDiagnostics;
 813     for (i = 0; i < rlist->num_records; i++)
 814     {
 815         Z_NamePlusRecord *npr = rlist->records[i];
 816
 817         cl->records++;
 818         if (npr->which != Z_NamePlusRecord_databaseRecord)
 819         {
 820             yaz_log(YLOG_WARN,
 821                     "Unexpected record type, probably diagnostic %s",
 822                     cl->database->database->url);
 823             continue;
 824         }
 825
 826         rec = ingest_record(cl, npr->u.databaseRecord);
 827         if (!rec)
 828             continue;
 829     }
 830     if (s->watchlist[SESSION_WATCH_RECORDS].fun && rlist->num_records)
 831         session_alert_watch(s, SESSION_WATCH_RECORDS);
 832
 833 #if USE_TIMING
 834     yaz_timing_stop(t);
 835     yaz_log(YLOG_LOG, "ingest_records %6.5f %3.2f %3.2f",
 836             yaz_timing_get_real(t), yaz_timing_get_user(t),
 837             yaz_timing_get_sys(t));
 838     yaz_timing_destroy(&t);
 839 #endif
 840 }
 841
 842 static void do_presentResponse(IOCHAN i, Z_APDU *a)
 843 {
 844     struct connection *co = iochan_getdata(i);
 845     struct client *cl = co->client;
 846     Z_PresentResponse *r = a->u.presentResponse;
 847
 848     if (r->records) {
 849         Z_Records *recs = r->records;
 850         if (recs->which == Z_Records_NSD)
 851         {
 852             yaz_log(YLOG_WARN, "Non-surrogate diagnostic %s",
 853                     cl->database->database->url);
 854             cl->diagnostic = *recs->u.nonSurrogateDiagnostic->condition;
 855             cl->state = Client_Error;
 856         }
 857     }
 858
 859     if (!*r->presentStatus && cl->state != Client_Error)
 860     {
 861         yaz_log(YLOG_DEBUG, "Good Present response %s",
 862                 cl->database->database->url);
 863         ingest_records(cl, r->records);
 864         cl->state = Client_Idle;
 865     }
 866     else if (*r->presentStatus)
 867     {
 868         yaz_log(YLOG_WARN, "Bad Present response %s",
 869                 cl->database->database->url);
 870         cl->state = Client_Error;
 871     }
 872 }
 873
 874 static void handler(IOCHAN i, int event)
 875 {
 876     struct connection *co = iochan_getdata(i);
 877     struct client *cl = co->client;
 878     struct session *se = 0;
 879
 880     if (cl)
 881         se = cl->session;
 882     else
 883     {
 884         yaz_log(YLOG_WARN, "Destroying orphan connection");
 885         connection_destroy(co);
 886         return;
 887     }
 888
 889     if (co->state == Conn_Connecting && event & EVENT_OUTPUT)
 890     {
 891         int errcode;
 892         socklen_t errlen = sizeof(errcode);
 893
 894         if (getsockopt(cs_fileno(co->link), SOL_SOCKET, SO_ERROR, &errcode,
 895             &errlen) < 0 || errcode != 0)
 896         {
 897             client_fatal(cl);
 898             return;
 899         }
 900         else
 901         {
 902             yaz_log(YLOG_DEBUG, "Connect OK");
 903             co->state = Conn_Open;
 904             if (cl)
 905                 cl->state = Client_Connected;
 906         }
 907     }
 908
 909     else if (event & EVENT_INPUT)
 910     {
 911         int len = cs_get(co->link, &co->ibuf, &co->ibufsize);
 912
 913         if (len < 0)
 914         {
 915             yaz_log(YLOG_WARN|YLOG_ERRNO, "Error reading from %s",
 916                     cl->database->database->url);
 917             connection_destroy(co);
 918             return;
 919         }
 920         else if (len == 0)
 921         {
 922             yaz_log(YLOG_WARN, "EOF reading from %s", cl->database->database->url);
 923             connection_destroy(co);
 924             return;
 925         }
 926         else if (len > 1) // We discard input if we have no connection
 927         {
 928             co->state = Conn_Open;
 929
 930             if (cl && (cl->requestid == se->requestid || cl->state == Client_Initializing))
 931             {
 932                 Z_APDU *a;
 933
 934                 odr_reset(global_parameters.odr_in);
 935                 odr_setbuf(global_parameters.odr_in, co->ibuf, len, 0);
 936                 if (!z_APDU(global_parameters.odr_in, &a, 0, 0))
 937                 {
 938                     client_fatal(cl);
 939                     return;
 940                 }
 941                 switch (a->which)
 942                 {
 943                     case Z_APDU_initResponse:
 944                         do_initResponse(i, a);
 945                         break;
 946                     case Z_APDU_searchResponse:
 947                         do_searchResponse(i, a);
 948                         break;
 949                     case Z_APDU_presentResponse:
 950                         do_presentResponse(i, a);
 951                         break;
 952                     case Z_APDU_close:
 953                         do_closeResponse(i, a);
 954                         break;
 955                     default:
 956                         yaz_log(YLOG_WARN,
 957                                 "Unexpected Z39.50 response from %s",
 958                                 cl->database->database->url);
 959                         client_fatal(cl);
 960                         return;
 961                 }
 962                 // We aren't expecting staggered output from target
 963                 // if (cs_more(t->link))
 964                 //    iochan_setevent(i, EVENT_INPUT);
 965             }
 966             else  // we throw away response and go to idle mode
 967             {
 968                 yaz_log(YLOG_DEBUG, "Ignoring result of expired operation");
 969                 cl->state = Client_Idle;
 970             }
 971         }
 972         /* if len==1 we do nothing but wait for more input */
 973     }
 974
 975     if (cl->state == Client_Connected) {
 976         send_init(i);
 977     }
 978
 979     if (cl->state == Client_Idle)
 980     {
 981         if (cl->requestid != se->requestid && *se->query) {
 982             send_search(i);
 983         }
 984         else if (cl->hits > 0 && cl->records < global_parameters.toget &&
 985             cl->records < cl->hits) {
 986             send_present(i);
 987         }
 988     }
 989 }
 990
 991 // Disassociate connection from client
 992 static void connection_release(struct connection *co)
 993 {
 994     struct client *cl = co->client;
 995
 996     yaz_log(YLOG_DEBUG, "Connection release %s", co->host->hostport);
 997     if (!cl)
 998         return;
 999     cl->connection = 0;
1000     co->client = 0;
1001 }
1002
1003 // Close connection and recycle structure
1004 static void connection_destroy(struct connection *co)
1005 {
1006     struct host *h = co->host;
1007     cs_close(co->link);
1008     iochan_destroy(co->iochan);
1009
1010     yaz_log(YLOG_DEBUG, "Connection destroy %s", co->host->hostport);
1011     if (h->connections == co)
1012         h->connections = co->next;
1013     else
1014     {
1015         struct connection *pco;
1016         for (pco = h->connections; pco && pco->next != co; pco = pco->next)
1017             ;
1018         if (pco)
1019             pco->next = co->next;
1020         else
1021             abort();
1022     }
1023     if (co->client)
1024     {
1025         if (co->client->state != Client_Idle)
1026             co->client->state = Client_Disconnected;
1027         co->client->connection = 0;
1028     }
1029     co->next = connection_freelist;
1030     connection_freelist = co;
1031 }
1032
1033 // Creates a new connection for client, associated with the host of
1034 // client's database
1035 static struct connection *connection_create(struct client *cl)
1036 {
1037     struct connection *new;
1038     COMSTACK link;
1039     int res;
1040     void *addr;
1041
1042
1043     if (!(link = cs_create(tcpip_type, 0, PROTO_Z3950)))
1044         {
1045             yaz_log(YLOG_FATAL|YLOG_ERRNO, "Failed to create comstack");
1046             exit(1);
1047         }
1048
1049     if (0 == strlen(global_parameters.zproxy_override)){
1050         /* no Z39.50 proxy needed - direct connect */
1051         yaz_log(YLOG_DEBUG, "Connection create %s", cl->database->database->url);
1052
1053         if (!(addr = cs_straddr(link, cl->database->database->host->ipport)))
1054             {
1055                 yaz_log(YLOG_WARN|YLOG_ERRNO,
1056                         "Lookup of IP address %s failed",
1057                         cl->database->database->host->ipport);
1058                 return 0;
1059             }
1060
1061     } else {
1062         /* Z39.50 proxy connect */
1063         yaz_log(YLOG_DEBUG, "Connection create %s proxy %s",
1064                 cl->database->database->url, global_parameters.zproxy_override);
1065
1066         if (!(addr = cs_straddr(link, global_parameters.zproxy_override)))
1067             {
1068                 yaz_log(YLOG_WARN|YLOG_ERRNO,
1069                         "Lookup of IP address %s failed",
1070                         global_parameters.zproxy_override);
1071                 return 0;
1072             }
1073     }
1074
1075     res = cs_connect(link, addr);
1076     if (res < 0)
1077     {
1078         yaz_log(YLOG_WARN|YLOG_ERRNO, "cs_connect %s", cl->database->database->url);
1079         return 0;
1080     }
1081
1082     if ((new = connection_freelist))
1083         connection_freelist = new->next;
1084     else
1085     {
1086         new = xmalloc(sizeof (struct connection));
1087         new->ibuf = 0;
1088         new->ibufsize = 0;
1089     }
1090     new->state = Conn_Connecting;
1091     new->host = cl->database->database->host;
1092     new->next = new->host->connections;
1093     new->host->connections = new;
1094     new->client = cl;
1095     cl->connection = new;
1096     new->link = link;
1097
1098     new->iochan = iochan_create(cs_fileno(link), handler, 0);
1099     iochan_setdata(new->iochan, new);
1100     new->iochan->next = channel_list;
1101     channel_list = new->iochan;
1102     return new;
1103 }
1104
1105 // Close connection and set state to error
1106 static void client_fatal(struct client *cl)
1107 {
1108     yaz_log(YLOG_WARN, "Fatal error from %s", cl->database->database->url);
1109     connection_destroy(cl->connection);
1110     cl->state = Client_Error;
1111 }
1112
1113 // Ensure that client has a connection associated
1114 static int client_prep_connection(struct client *cl)
1115 {
1116     struct connection *co;
1117     struct session *se = cl->session;
1118     struct host *host = cl->database->database->host;
1119
1120     co = cl->connection;
1121
1122     yaz_log(YLOG_DEBUG, "Client prep %s", cl->database->database->url);
1123
1124     if (!co)
1125     {
1126         // See if someone else has an idle connection
1127         // We should look at timestamps here to select the longest-idle connection
1128         for (co = host->connections; co; co = co->next)
1129             if (co->state == Conn_Open && (!co->client || co->client->session != se))
1130                 break;
1131         if (co)
1132         {
1133             connection_release(co);
1134             cl->connection = co;
1135             co->client = cl;
1136         }
1137         else
1138             co = connection_create(cl);
1139     }
1140     if (co)
1141     {
1142         if (co->state == Conn_Connecting)
1143         {
1144             cl->state = Client_Connecting;
1145             iochan_setflag(co->iochan, EVENT_OUTPUT);
1146         }
1147         else if (co->state == Conn_Open)
1148         {
1149             if (cl->state == Client_Error || cl->state == Client_Disconnected)
1150                 cl->state = Client_Idle;
1151             iochan_setflag(co->iochan, EVENT_OUTPUT);
1152         }
1153         return 1;
1154     }
1155     else
1156         return 0;
1157 }
1158
1159 static struct client *client_create(void)
1160 {
1161     struct client *r;
1162     if (client_freelist)
1163     {
1164         r = client_freelist;
1165         client_freelist = client_freelist->next;
1166     }
1167     else
1168         r = xmalloc(sizeof(struct client));
1169     r->database = 0;
1170     r->connection = 0;
1171     r->session = 0;
1172     r->hits = 0;
1173     r->records = 0;
1174     r->setno = 0;
1175     r->requestid = -1;
1176     r->diagnostic = 0;
1177     r->state = Client_Disconnected;
1178     r->next = 0;
1179     return r;
1180 }
1181
1182 void client_destroy(struct client *c)
1183 {
1184     struct session *se = c->session;
1185     if (c == se->clients)
1186         se->clients = c->next;
1187     else
1188     {
1189         struct client *cc;
1190         for (cc = se->clients; cc && cc->next != c; cc = cc->next)
1191             ;
1192         if (cc)
1193             cc->next = c->next;
1194     }
1195     if (c->connection)
1196         connection_release(c->connection);
1197     c->next = client_freelist;
1198     client_freelist = c;
1199 }
1200
1201 void session_set_watch(struct session *s, int what, session_watchfun fun, void *data)
1202 {
1203     s->watchlist[what].fun = fun;
1204     s->watchlist[what].data = data;
1205 }
1206
1207 void session_alert_watch(struct session *s, int what)
1208 {
1209     if (!s->watchlist[what].fun)
1210         return;
1211     (*s->watchlist[what].fun)(s->watchlist[what].data);
1212     s->watchlist[what].fun = 0;
1213     s->watchlist[what].data = 0;
1214 }
1215
1216 //callback for grep_databases
1217 static void select_targets_callback(void *context, struct session_database *db)
1218 {
1219     struct session *se = (struct session*) context;
1220     struct client *cl = client_create();
1221     cl->database = db;
1222     cl->session = se;
1223     cl->next = se->clients;
1224     se->clients = cl;
1225 }
1226
1227 // Associates a set of clients with a session;
1228 // Note: Session-databases represent databases with per-session setting overrides
1229 int select_targets(struct session *se, struct database_criterion *crit)
1230 {
1231     while (se->clients)
1232         client_destroy(se->clients);
1233
1234     return session_grep_databases(se, crit, select_targets_callback);
1235 }
1236
1237 int session_active_clients(struct session *s)
1238 {
1239     struct client *c;
1240     int res = 0;
1241
1242     for (c = s->clients; c; c = c->next)
1243         if (c->connection && (c->state == Client_Connecting ||
1244                     c->state == Client_Initializing ||
1245                     c->state == Client_Searching ||
1246                     c->state == Client_Presenting))
1247             res++;
1248
1249     return res;
1250 }
1251
1252 // parses crit1=val1,crit2=val2|val3,...
1253 static struct database_criterion *parse_filter(NMEM m, const char *buf)
1254 {
1255     struct database_criterion *res = 0;
1256     char **values;
1257     int num;
1258     int i;
1259
1260     if (!buf || !*buf)
1261         return 0;
1262     nmem_strsplit(m, ",", buf,  &values, &num);
1263     for (i = 0; i < num; i++)
1264     {
1265         char **subvalues;
1266         int subnum;
1267         int subi;
1268         struct database_criterion *new = nmem_malloc(m, sizeof(*new));
1269         char *eq = strchr(values[i], '=');
1270         if (!eq)
1271         {
1272             yaz_log(YLOG_WARN, "Missing equal-sign in filter");
1273             return 0;
1274         }
1275         *(eq++) = '\0';
1276         new->name = values[i];
1277         nmem_strsplit(m, "|", eq, &subvalues, &subnum);
1278         new->values = 0;
1279         for (subi = 0; subi < subnum; subi++)
1280         {
1281             struct database_criterion_value *newv = nmem_malloc(m, sizeof(*newv));
1282             newv->value = subvalues[subi];
1283             newv->next = new->values;
1284             new->values = newv;
1285         }
1286         new->next = res;
1287         res = new;
1288     }
1289     return res;
1290 }
1291
1292 char *search(struct session *se, char *query, char *filter)
1293 {
1294     int live_channels = 0;
1295     struct client *cl;
1296     struct database_criterion *criteria;
1297
1298     yaz_log(YLOG_DEBUG, "Search");
1299
1300     nmem_reset(se->nmem);
1301     criteria = parse_filter(se->nmem, filter);
1302     strcpy(se->query, query);
1303     se->requestid++;
1304     select_targets(se, criteria);
1305     for (cl = se->clients; cl; cl = cl->next)
1306     {
1307         if (client_prep_connection(cl))
1308             live_channels++;
1309     }
1310     if (live_channels)
1311     {
1312         int maxrecs = live_channels * global_parameters.toget;
1313         se->num_termlists = 0;
1314         se->reclist = reclist_create(se->nmem, maxrecs);
1315         // This will be initialized in send_search()
1316         se->relevance = 0;
1317         se->total_records = se->total_hits = se->total_merged = 0;
1318         se->expected_maxrecs = maxrecs;
1319     }
1320     else
1321         return "NOTARGETS";
1322
1323     return 0;
1324 }
1325
1326 // Apply a session override to a database
1327 void session_apply_setting(struct session *se, char *dbname, char *setting, char *value)
1328 {
1329     struct session_database *sdb;
1330
1331     for (sdb = se->databases; sdb; sdb = sdb->next)
1332         if (!strcmp(dbname, sdb->database->url))
1333         {
1334             struct setting *new = nmem_malloc(se->session_nmem, sizeof(*new));
1335             int offset = settings_offset(setting);
1336
1337             if (offset < 0)
1338             {
1339                 yaz_log(YLOG_WARN, "Unknown setting %s", setting);
1340                 return;
1341             }
1342             new->precedence = 0;
1343             new->target = dbname;
1344             new->name = setting;
1345             new->value = value;
1346             new->user = "";
1347             new->next = sdb->settings[offset];
1348             sdb->settings[offset] = new;
1349             break;
1350         }
1351     if (!sdb)
1352         yaz_log(YLOG_WARN, "Unknown database in setting override: %s", dbname);
1353 }
1354
1355 void session_init_databases_fun(void *context, struct database *db)
1356 {
1357     struct session *se = (struct session *) context;
1358     struct session_database *new = nmem_malloc(se->session_nmem, sizeof(*new));
1359     int num = settings_num();
1360     int i;
1361
1362     new->database = db;
1363     new->settings = nmem_malloc(se->session_nmem, sizeof(struct settings *) * num);
1364     for (i = 0; i < num; i++)
1365         new->settings[i] = db->settings[i];
1366     new->next = se->databases;
1367     se->databases = new;
1368 }
1369
1370 // Initialize session_database list -- this represents this session's view
1371 // of the database list -- subject to modification by the settings ws command
1372 void session_init_databases(struct session *se)
1373 {
1374     se->databases = 0;
1375     grep_databases(se, 0, session_init_databases_fun);
1376 }
1377
1378 void destroy_session(struct session *s)
1379 {
1380     yaz_log(YLOG_LOG, "Destroying session");
1381     while (s->clients)
1382         client_destroy(s->clients);
1383     nmem_destroy(s->nmem);
1384     wrbuf_destroy(s->wrbuf);
1385 }
1386
1387 struct session *new_session(NMEM nmem)
1388 {
1389     int i;
1390     struct session *session = nmem_malloc(nmem, sizeof(*session));
1391
1392     yaz_log(YLOG_DEBUG, "New Pazpar2 session");
1393
1394     session->total_hits = 0;
1395     session->total_records = 0;
1396     session->num_termlists = 0;
1397     session->reclist = 0;
1398     session->requestid = -1;
1399     session->clients = 0;
1400     session->expected_maxrecs = 0;
1401     session->query[0] = '\0';
1402     session->session_nmem = nmem;
1403     session->nmem = nmem_create();
1404     session->wrbuf = wrbuf_alloc();
1405     session_init_databases(session);
1406     for (i = 0; i <= SESSION_WATCH_MAX; i++)
1407     {
1408         session->watchlist[i].data = 0;
1409         session->watchlist[i].fun = 0;
1410     }
1411
1412     return session;
1413 }
1414
1415 struct hitsbytarget *hitsbytarget(struct session *se, int *count)
1416 {
1417     static struct hitsbytarget res[1000]; // FIXME MM
1418     struct client *cl;
1419
1420     *count = 0;
1421     for (cl = se->clients; cl; cl = cl->next)
1422     {
1423         res[*count].id = cl->database->database->url;
1424         res[*count].name = cl->database->database->name;
1425         res[*count].hits = cl->hits;
1426         res[*count].records = cl->records;
1427         res[*count].diagnostic = cl->diagnostic;
1428         res[*count].state = client_states[cl->state];
1429         res[*count].connected  = cl->connection ? 1 : 0;
1430         (*count)++;
1431     }
1432
1433     return res;
1434 }
1435
1436 struct termlist_score **termlist(struct session *s, const char *name, int *num)
1437 {
1438     int i;
1439
1440     for (i = 0; i < s->num_termlists; i++)
1441         if (!strcmp((const char *) s->termlists[i].name, name))
1442             return termlist_highscore(s->termlists[i].termlist, num);
1443     return 0;
1444 }
1445
1446 #ifdef MISSING_HEADERS
1447 void report_nmem_stats(void)
1448 {
1449     size_t in_use, is_free;
1450
1451     nmem_get_memory_in_use(&in_use);
1452     nmem_get_memory_free(&is_free);
1453
1454     yaz_log(YLOG_LOG, "nmem stat: use=%ld free=%ld",
1455             (long) in_use, (long) is_free);
1456 }
1457 #endif
1458
1459 struct record_cluster *show_single(struct session *s, int id)
1460 {
1461     struct record_cluster *r;
1462
1463     reclist_rewind(s->reclist);
1464     while ((r = reclist_read_record(s->reclist)))
1465         if (r->recid == id)
1466             return r;
1467     return 0;
1468 }
1469
1470 struct record_cluster **show(struct session *s, struct reclist_sortparms *sp, int start,
1471         int *num, int *total, int *sumhits, NMEM nmem_show)
1472 {
1473     struct record_cluster **recs = nmem_malloc(nmem_show, *num
1474                                        * sizeof(struct record_cluster *));
1475     struct reclist_sortparms *spp;
1476     int i;
1477 #if USE_TIMING
1478     yaz_timing_t t = yaz_timing_create();
1479 #endif
1480
1481     for (spp = sp; spp; spp = spp->next)
1482         if (spp->type == Metadata_sortkey_relevance)
1483         {
1484             relevance_prepare_read(s->relevance, s->reclist);
1485             break;
1486         }
1487     reclist_sort(s->reclist, sp);
1488
1489     *total = s->reclist->num_records;
1490     *sumhits = s->total_hits;
1491
1492     for (i = 0; i < start; i++)
1493         if (!reclist_read_record(s->reclist))
1494         {
1495             *num = 0;
1496             recs = 0;
1497             break;
1498         }
1499
1500     for (i = 0; i < *num; i++)
1501     {
1502         struct record_cluster *r = reclist_read_record(s->reclist);
1503         if (!r)
1504         {
1505             *num = i;
1506             break;
1507         }
1508         recs[i] = r;
1509     }
1510 #if USE_TIMING
1511     yaz_timing_stop(t);
1512     yaz_log(YLOG_LOG, "show %6.5f %3.2f %3.2f",
1513             yaz_timing_get_real(t), yaz_timing_get_user(t),
1514             yaz_timing_get_sys(t));
1515     yaz_timing_destroy(&t);
1516 #endif
1517     return recs;
1518 }
1519
1520 void statistics(struct session *se, struct statistics *stat)
1521 {
1522     struct client *cl;
1523     int count = 0;
1524
1525     memset(stat, 0, sizeof(*stat));
1526     for (cl = se->clients; cl; cl = cl->next)
1527     {
1528         if (!cl->connection)
1529             stat->num_no_connection++;
1530         switch (cl->state)
1531         {
1532             case Client_Connecting: stat->num_connecting++; break;
1533             case Client_Initializing: stat->num_initializing++; break;
1534             case Client_Searching: stat->num_searching++; break;
1535             case Client_Presenting: stat->num_presenting++; break;
1536             case Client_Idle: stat->num_idle++; break;
1537             case Client_Failed: stat->num_failed++; break;
1538             case Client_Error: stat->num_error++; break;
1539             default: break;
1540         }
1541         count++;
1542     }
1543     stat->num_hits = se->total_hits;
1544     stat->num_records = se->total_records;
1545
1546     stat->num_clients = count;
1547 }
1548
1549 static void start_http_listener(void)
1550 {
1551     char hp[128] = "";
1552     struct conf_server *ser = global_parameters.server;
1553
1554     if (*global_parameters.listener_override)
1555         strcpy(hp, global_parameters.listener_override);
1556     else
1557     {
1558         strcpy(hp, ser->host ? ser->host : "");
1559         if (ser->port)
1560         {
1561             if (*hp)
1562                 strcat(hp, ":");
1563             sprintf(hp + strlen(hp), "%d", ser->port);
1564         }
1565     }
1566     http_init(hp);
1567 }
1568
1569 static void start_proxy(void)
1570 {
1571     char hp[128] = "";
1572     struct conf_server *ser = global_parameters.server;
1573
1574     if (*global_parameters.proxy_override)
1575         strcpy(hp, global_parameters.proxy_override);
1576     else if (ser->proxy_host || ser->proxy_port)
1577     {
1578         strcpy(hp, ser->proxy_host ? ser->proxy_host : "");
1579         if (ser->proxy_port)
1580         {
1581             if (*hp)
1582                 strcat(hp, ":");
1583             sprintf(hp + strlen(hp), "%d", ser->proxy_port);
1584         }
1585     }
1586     else
1587         return;
1588
1589     http_set_proxyaddr(hp, ser->myurl ? ser->myurl : "");
1590 }
1591
1592 static void start_zproxy(void)
1593 {
1594     struct conf_server *ser = global_parameters.server;
1595
1596     if (*global_parameters.zproxy_override){
1597         yaz_log(YLOG_LOG, "Z39.50 proxy  %s",
1598                 global_parameters.zproxy_override);
1599         return;
1600     }
1601
1602     else if (ser->zproxy_host || ser->zproxy_port)
1603     {
1604         char hp[128] = "";
1605
1606         strcpy(hp, ser->zproxy_host ? ser->zproxy_host : "");
1607         if (ser->zproxy_port)
1608         {
1609             if (*hp)
1610                 strcat(hp, ":");
1611             else
1612                 strcat(hp, "@:");
1613
1614             sprintf(hp + strlen(hp), "%d", ser->zproxy_port);
1615         }
1616         strcpy(global_parameters.zproxy_override, hp);
1617         yaz_log(YLOG_LOG, "Z39.50 proxy  %s",
1618                 global_parameters.zproxy_override);
1619
1620     }
1621     else
1622         return;
1623 }
1624
1625
1626
1627 int main(int argc, char **argv)
1628 {
1629     int ret;
1630     char *arg;
1631
1632     if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
1633         yaz_log(YLOG_WARN|YLOG_ERRNO, "signal");
1634
1635     yaz_log_init(YLOG_DEFAULT_LEVEL, "pazpar2", 0);
1636
1637     while ((ret = options("t:f:x:h:p:z:s:d", argv, argc, &arg)) != -2)
1638     {
1639         switch (ret) {
1640             case 'f':
1641                 if (!read_config(arg))
1642                     exit(1);
1643                 break;
1644             case 'h':
1645                 strcpy(global_parameters.listener_override, arg);
1646                 break;
1647             case 'p':
1648                 strcpy(global_parameters.proxy_override, arg);
1649                 break;
1650             case 'z':
1651                 strcpy(global_parameters.zproxy_override, arg);
1652                 break;
1653             case 't':
1654                 strcpy(global_parameters.settings_path_override, arg);
1655                 break;
1656             case 's':
1657                 load_simpletargets(arg);
1658                 break;
1659             case 'd':
1660                 global_parameters.dump_records = 1;
1661                 break;
1662             default:
1663                 fprintf(stderr, "Usage: pazpar2\n"
1664                         "    -f configfile\n"
1665                         "    -h [host:]port          (REST protocol listener)\n"
1666                         "    -C cclconfig\n"
1667                         "    -s simpletargetfile\n"
1668                         "    -p hostname[:portno]    (HTTP proxy)\n"
1669                         "    -z hostname[:portno]    (Z39.50 proxy)\n"
1670                         "    -d                      (show internal records)\n");
1671                 exit(1);
1672         }
1673     }
1674
1675     if (!config)
1676     {
1677         yaz_log(YLOG_FATAL, "Load config with -f");
1678         exit(1);
1679     }
1680     global_parameters.server = config->servers;
1681
1682     start_http_listener();
1683     start_proxy();
1684     start_zproxy();
1685
1686     if (*global_parameters.settings_path_override)
1687         settings_read(global_parameters.settings_path_override);
1688     else if (global_parameters.server->settings)
1689         settings_read(global_parameters.server->settings);
1690     else
1691         yaz_log(YLOG_WARN, "No settings-directory specified. Problems may well ensue!");
1692     prepare_databases();
1693     global_parameters.odr_in = odr_createmem(ODR_DECODE);
1694     global_parameters.odr_out = odr_createmem(ODR_ENCODE);
1695
1696     event_loop(&channel_list);
1697
1698     return 0;
1699 }
1700
1701 /*
1702  * Local variables:
1703  * c-basic-offset: 4
1704  * indent-tabs-mode: nil
1705  * End:
1706  * vim: shiftwidth=4 tabstop=8 expandtab
1707  */