src/pazpar2.c

   1 /* $Id: pazpar2.c,v 1.73 2007-04-11 18:42:25 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
  72 IOCHAN channel_list = 0;  // Master list of connections we're handling events to
  73
  74 static struct connection *connection_freelist = 0;
  75 static struct client *client_freelist = 0;
  76
  77 static char *client_states[] = {
  78     "Client_Connecting",
  79     "Client_Connected",
  80     "Client_Idle",
  81     "Client_Initializing",
  82     "Client_Searching",
  83     "Client_Presenting",
  84     "Client_Error",
  85     "Client_Failed",
  86     "Client_Disconnected",
  87     "Client_Stopped"
  88 };
  89
  90 // Note: Some things in this structure will eventually move to configuration
  91 struct parameters global_parameters =
  92 {
  93     "",
  94     "",
  95     "",
  96     "",
  97     0,
  98     0,
  99     30,
 100     "81",
 101     "Index Data PazPar2 (MasterKey)",
 102     VERSION,
 103     600, // 10 minutes
 104     60,
 105     100,
 106     MAX_CHUNK,
 107     0,
 108     0
 109 };
 110
 111 static int send_apdu(struct client *c, Z_APDU *a)
 112 {
 113     struct connection *co = c->connection;
 114     char *buf;
 115     int len, r;
 116
 117     if (!z_APDU(global_parameters.odr_out, &a, 0, 0))
 118     {
 119         odr_perror(global_parameters.odr_out, "Encoding APDU");
 120         abort();
 121     }
 122     buf = odr_getbuf(global_parameters.odr_out, &len, 0);
 123     r = cs_put(co->link, buf, len);
 124     if (r < 0)
 125     {
 126         yaz_log(YLOG_WARN, "cs_put: %s", cs_errmsg(cs_errno(co->link)));
 127         return -1;
 128     }
 129     else if (r == 1)
 130     {
 131         fprintf(stderr, "cs_put incomplete (ParaZ does not handle that)\n");
 132         exit(1);
 133     }
 134     odr_reset(global_parameters.odr_out); /* release the APDU structure  */
 135     co->state = Conn_Waiting;
 136     return 0;
 137 }
 138
 139 // Set authentication token in init if one is set for the client
 140 // TODO: Extend this to handle other schemes than open (should be simple)
 141 static void init_authentication(struct client *cl, Z_InitRequest *req)
 142 {
 143     struct session_database *sdb = cl->database;
 144     char *auth = session_setting_oneval(sdb, PZ_AUTHENTICATION);
 145
 146     if (auth)
 147     {
 148         Z_IdAuthentication *idAuth = odr_malloc(global_parameters.odr_out,
 149                 sizeof(*idAuth));
 150         idAuth->which = Z_IdAuthentication_open;
 151         idAuth->u.open = auth;
 152         req->idAuthentication = idAuth;
 153     }
 154 }
 155
 156 static void send_init(IOCHAN i)
 157 {
 158
 159     struct connection *co = iochan_getdata(i);
 160     struct client *cl = co->client;
 161     Z_APDU *a = zget_APDU(global_parameters.odr_out, Z_APDU_initRequest);
 162
 163     a->u.initRequest->implementationId = global_parameters.implementationId;
 164     a->u.initRequest->implementationName = global_parameters.implementationName;
 165     a->u.initRequest->implementationVersion =
 166         global_parameters.implementationVersion;
 167     ODR_MASK_SET(a->u.initRequest->options, Z_Options_search);
 168     ODR_MASK_SET(a->u.initRequest->options, Z_Options_present);
 169     ODR_MASK_SET(a->u.initRequest->options, Z_Options_namedResultSets);
 170
 171     ODR_MASK_SET(a->u.initRequest->protocolVersion, Z_ProtocolVersion_1);
 172     ODR_MASK_SET(a->u.initRequest->protocolVersion, Z_ProtocolVersion_2);
 173     ODR_MASK_SET(a->u.initRequest->protocolVersion, Z_ProtocolVersion_3);
 174
 175     init_authentication(cl, a->u.initRequest);
 176
 177     /* add virtual host if tunneling through Z39.50 proxy */
 178
 179     if (0 < strlen(global_parameters.zproxy_override)
 180         && 0 < strlen(cl->database->database->url))
 181         yaz_oi_set_string_oidval(&a->u.initRequest->otherInfo,
 182                                  global_parameters.odr_out, VAL_PROXY,
 183                                  1, cl->database->database->url);
 184
 185     if (send_apdu(cl, a) >= 0)
 186     {
 187         iochan_setflags(i, EVENT_INPUT);
 188         cl->state = Client_Initializing;
 189     }
 190     else
 191         cl->state = Client_Error;
 192     odr_reset(global_parameters.odr_out);
 193 }
 194
 195 static void pull_terms(NMEM nmem, struct ccl_rpn_node *n, char **termlist, int *num)
 196 {
 197     switch (n->kind)
 198     {
 199         case CCL_RPN_AND:
 200         case CCL_RPN_OR:
 201         case CCL_RPN_NOT:
 202         case CCL_RPN_PROX:
 203             pull_terms(nmem, n->u.p[0], termlist, num);
 204             pull_terms(nmem, n->u.p[1], termlist, num);
 205             break;
 206         case CCL_RPN_TERM:
 207             termlist[(*num)++] = nmem_strdup(nmem, n->u.t.term);
 208             break;
 209         default: // NOOP
 210             break;
 211     }
 212 }
 213
 214 // Extract terms from query into null-terminated termlist
 215 static void extract_terms(NMEM nmem, struct ccl_rpn_node *query, char **termlist)
 216 {
 217     int num = 0;
 218
 219     pull_terms(nmem, query, termlist, &num);
 220     termlist[num] = 0;
 221 }
 222
 223 static void send_search(IOCHAN i)
 224 {
 225     struct connection *co = iochan_getdata(i);
 226     struct client *cl = co->client;
 227     struct session *se = cl->session;
 228     struct session_database *sdb = cl->database;
 229     Z_APDU *a = zget_APDU(global_parameters.odr_out, Z_APDU_searchRequest);
 230     int ndb, cerror, cpos;
 231     char **databaselist;
 232     Z_Query *zquery;
 233     struct ccl_rpn_node *cn;
 234     int ssub = 0, lslb = 100000, mspn = 10;
 235     char *recsyn;
 236     char *piggyback;
 237
 238     yaz_log(YLOG_DEBUG, "Sending search");
 239
 240     cn = ccl_find_str(sdb->database->ccl_map, se->query, &cerror, &cpos);
 241     if (!cn)
 242         return;
 243
 244     if (!se->relevance)
 245     {
 246         // Initialize relevance structure with query terms
 247         char *p[512];
 248         extract_terms(se->nmem, cn, p);
 249         se->relevance = relevance_create(se->nmem, (const char **) p,
 250                 se->expected_maxrecs);
 251     }
 252
 253     a->u.searchRequest->query = zquery = odr_malloc(global_parameters.odr_out,
 254             sizeof(Z_Query));
 255     zquery->which = Z_Query_type_1;
 256     zquery->u.type_1 = ccl_rpn_query(global_parameters.odr_out, cn);
 257     ccl_rpn_delete(cn);
 258
 259     for (ndb = 0; sdb->database->databases[ndb]; ndb++)
 260         ;
 261     databaselist = odr_malloc(global_parameters.odr_out, sizeof(char*) * ndb);
 262     for (ndb = 0; sdb->database->databases[ndb]; ndb++)
 263         databaselist[ndb] = sdb->database->databases[ndb];
 264
 265     if (!(piggyback = session_setting_oneval(sdb, PZ_PIGGYBACK)) || *piggyback == '1')
 266     {
 267         if ((recsyn = session_setting_oneval(sdb, PZ_REQUESTSYNTAX)))
 268             a->u.searchRequest->preferredRecordSyntax =
 269                     yaz_str_to_z3950oid(global_parameters.odr_out,
 270                     CLASS_RECSYN, recsyn);
 271         a->u.searchRequest->smallSetUpperBound = &ssub;
 272         a->u.searchRequest->largeSetLowerBound = &lslb;
 273         a->u.searchRequest->mediumSetPresentNumber = &mspn;
 274     }
 275     a->u.searchRequest->resultSetName = "Default";
 276     a->u.searchRequest->databaseNames = databaselist;
 277     a->u.searchRequest->num_databaseNames = ndb;
 278
 279     if (send_apdu(cl, a) >= 0)
 280     {
 281         iochan_setflags(i, EVENT_INPUT);
 282         cl->state = Client_Searching;
 283         cl->requestid = se->requestid;
 284     }
 285     else
 286         cl->state = Client_Error;
 287
 288     odr_reset(global_parameters.odr_out);
 289 }
 290
 291 static void send_present(IOCHAN i)
 292 {
 293     struct connection *co = iochan_getdata(i);
 294     struct client *cl = co->client;
 295     struct session_database *sdb = cl->database;
 296     Z_APDU *a = zget_APDU(global_parameters.odr_out, Z_APDU_presentRequest);
 297     int toget;
 298     int start = cl->records + 1;
 299     char *recsyn;
 300
 301     toget = global_parameters.chunk;
 302     if (toget > global_parameters.toget - cl->records)
 303         toget = global_parameters.toget - cl->records;
 304     if (toget > cl->hits - cl->records)
 305         toget = cl->hits - cl->records;
 306
 307     yaz_log(YLOG_DEBUG, "Trying to present %d records\n", toget);
 308
 309     a->u.presentRequest->resultSetStartPoint = &start;
 310     a->u.presentRequest->numberOfRecordsRequested = &toget;
 311
 312     a->u.presentRequest->resultSetId = "Default";
 313
 314     if ((recsyn = session_setting_oneval(sdb, PZ_REQUESTSYNTAX)))
 315         a->u.presentRequest->preferredRecordSyntax =
 316                 yaz_str_to_z3950oid(global_parameters.odr_out,
 317                 CLASS_RECSYN, recsyn);
 318
 319     if (send_apdu(cl, a) >= 0)
 320     {
 321         iochan_setflags(i, EVENT_INPUT);
 322         cl->state = Client_Presenting;
 323     }
 324     else
 325         cl->state = Client_Error;
 326     odr_reset(global_parameters.odr_out);
 327 }
 328
 329 static void do_initResponse(IOCHAN i, Z_APDU *a)
 330 {
 331     struct connection *co = iochan_getdata(i);
 332     struct client *cl = co->client;
 333     Z_InitResponse *r = a->u.initResponse;
 334
 335     yaz_log(YLOG_DEBUG, "Init response %s", cl->database->database->url);
 336
 337     if (*r->result)
 338     {
 339         cl->state = Client_Idle;
 340     }
 341     else
 342         cl->state = Client_Failed; // FIXME need to do something to the connection
 343 }
 344
 345 static void do_searchResponse(IOCHAN i, Z_APDU *a)
 346 {
 347     struct connection *co = iochan_getdata(i);
 348     struct client *cl = co->client;
 349     struct session *se = cl->session;
 350     Z_SearchResponse *r = a->u.searchResponse;
 351
 352     yaz_log(YLOG_DEBUG, "Search response %s (status=%d)",
 353             cl->database->database->url, *r->searchStatus);
 354
 355     if (*r->searchStatus)
 356     {
 357         cl->hits = *r->resultCount;
 358         se->total_hits += cl->hits;
 359         if (r->presentStatus && !*r->presentStatus && r->records)
 360         {
 361             yaz_log(YLOG_DEBUG, "Records in search response %s",
 362                     cl->database->database->url);
 363             ingest_records(cl, r->records);
 364         }
 365         cl->state = Client_Idle;
 366     }
 367     else
 368     {          /*"FAILED"*/
 369         cl->hits = 0;
 370         cl->state = Client_Error;
 371         if (r->records) {
 372             Z_Records *recs = r->records;
 373             if (recs->which == Z_Records_NSD)
 374             {
 375                 yaz_log(YLOG_WARN,
 376                         "Search response: Non-surrogate diagnostic %s",
 377                         cl->database->database->url);
 378                 cl->diagnostic = *recs->u.nonSurrogateDiagnostic->condition;
 379                 cl->state = Client_Error;
 380             }
 381         }
 382     }
 383 }
 384
 385 static void do_closeResponse(IOCHAN i, Z_APDU *a)
 386 {
 387     struct connection *co = iochan_getdata(i);
 388     struct client *cl = co->client;
 389     /* Z_Close *r = a->u.close; */
 390
 391     yaz_log(YLOG_WARN, "Close response %s", cl->database->database->url);
 392
 393     cl->state = Client_Failed;
 394     connection_destroy(co);
 395 }
 396
 397
 398 char *normalize_mergekey(char *buf, int skiparticle)
 399 {
 400     char *p = buf, *pout = buf;
 401
 402     if (skiparticle)
 403     {
 404         char firstword[64];
 405         char articles[] = "the den der die des an a "; // must end in space
 406
 407         while (*p && !isalnum(*p))
 408             p++;
 409         pout = firstword;
 410         while (*p && *p != ' ' && pout - firstword < 62)
 411             *(pout++) = tolower(*(p++));
 412         *(pout++) = ' ';
 413         *(pout++) = '\0';
 414         if (!strstr(articles, firstword))
 415             p = buf;
 416         pout = buf;
 417     }
 418
 419     while (*p)
 420     {
 421         while (*p && !isalnum(*p))
 422             p++;
 423         while (isalnum(*p))
 424             *(pout++) = tolower(*(p++));
 425         if (*p)
 426             *(pout++) = ' ';
 427         while (*p && !isalnum(*p))
 428             p++;
 429     }
 430     if (buf != pout)
 431         do {
 432             *(pout--) = '\0';
 433         }
 434         while (pout > buf && *pout == ' ');
 435
 436     return buf;
 437 }
 438
 439 static void add_facet(struct session *s, const char *type, const char *value)
 440 {
 441     int i;
 442
 443     if (!*value)
 444         return;
 445     for (i = 0; i < s->num_termlists; i++)
 446         if (!strcmp(s->termlists[i].name, type))
 447             break;
 448     if (i == s->num_termlists)
 449     {
 450         if (i == SESSION_MAX_TERMLISTS)
 451         {
 452             yaz_log(YLOG_FATAL, "Too many termlists");
 453             exit(1);
 454         }
 455         s->termlists[i].name = nmem_strdup(s->nmem, type);
 456         s->termlists[i].termlist = termlist_create(s->nmem, s->expected_maxrecs, 15);
 457         s->num_termlists = i + 1;
 458     }
 459     termlist_insert(s->termlists[i].termlist, value);
 460 }
 461
 462 static xmlDoc *normalize_record(struct client *cl, Z_External *rec)
 463 {
 464     struct database_retrievalmap *m;
 465     struct database *db = cl->database->database;
 466     xmlNode *res;
 467     xmlDoc *rdoc;
 468
 469     // First normalize to XML
 470     if (db->yaz_marc)
 471     {
 472         char *buf;
 473         int len;
 474         if (rec->which != Z_External_octet)
 475         {
 476             yaz_log(YLOG_WARN, "Unexpected external branch, probably BER %s",
 477                     cl->database->database->url);
 478             return 0;
 479         }
 480         buf = (char*) rec->u.octet_aligned->buf;
 481         len = rec->u.octet_aligned->len;
 482         if (yaz_marc_read_iso2709(db->yaz_marc, buf, len) < 0)
 483         {
 484             yaz_log(YLOG_WARN, "Failed to decode MARC %s",
 485                     cl->database->database->url);
 486             return 0;
 487         }
 488         if (yaz_marc_write_xml(db->yaz_marc, &res,
 489                     "http://www.loc.gov/MARC21/slim", 0, 0) < 0)
 490         {
 491             yaz_log(YLOG_WARN, "Failed to encode as XML %s",
 492                     cl->database->database->url);
 493             return 0;
 494         }
 495         rdoc = xmlNewDoc((xmlChar *) "1.0");
 496         xmlDocSetRootElement(rdoc, res);
 497     }
 498     else
 499     {
 500         yaz_log(YLOG_FATAL, "Unknown native_syntax in normalize_record");
 501         exit(1);
 502     }
 503
 504     if (global_parameters.dump_records)
 505     {
 506         fprintf(stderr, "Input Record (normalized):\n----------------\n");
 507 #if LIBXML_VERSION >= 20600
 508         xmlDocFormatDump(stderr, rdoc, 1);
 509 #else
 510         xmlDocDump(stderr, rdoc);
 511 #endif
 512     }
 513
 514     for (m = db->map; m; m = m->next)
 515     {
 516         xmlDoc *new;
 517         if (!(new = xsltApplyStylesheet(m->stylesheet, rdoc, 0)))
 518         {
 519             yaz_log(YLOG_WARN, "XSLT transformation failed");
 520             return 0;
 521         }
 522         xmlFreeDoc(rdoc);
 523         rdoc = new;
 524     }
 525     if (global_parameters.dump_records)
 526     {
 527         fprintf(stderr, "Record:\n----------------\n");
 528 #if LIBXML_VERSION >= 20600
 529         xmlDocFormatDump(stderr, rdoc, 1);
 530 #else
 531         xmlDocDump(stderr, rdoc);
 532 #endif
 533     }
 534     return rdoc;
 535 }
 536
 537 // Extract what appears to be years from buf, storing highest and
 538 // lowest values.
 539 static int extract_years(const char *buf, int *first, int *last)
 540 {
 541     *first = -1;
 542     *last = -1;
 543     while (*buf)
 544     {
 545         const char *e;
 546         int len;
 547
 548         while (*buf && !isdigit(*buf))
 549             buf++;
 550         len = 0;
 551         for (e = buf; *e && isdigit(*e); e++)
 552             len++;
 553         if (len == 4)
 554         {
 555             int value = atoi(buf);
 556             if (*first < 0 || value < *first)
 557                 *first = value;
 558             if (*last < 0 || value > *last)
 559                 *last = value;
 560         }
 561         buf = e;
 562     }
 563     return *first;
 564 }
 565
 566 static struct record *ingest_record(struct client *cl, Z_External *rec)
 567 {
 568     xmlDoc *xdoc = normalize_record(cl, rec);
 569     xmlNode *root, *n;
 570     struct record *res;
 571     struct record_cluster *cluster;
 572     struct session *se = cl->session;
 573     xmlChar *mergekey, *mergekey_norm;
 574     xmlChar *type = 0;
 575     xmlChar *value = 0;
 576     struct conf_service *service = global_parameters.server->service;
 577
 578     if (!xdoc)
 579         return 0;
 580
 581     root = xmlDocGetRootElement(xdoc);
 582     if (!(mergekey = xmlGetProp(root, (xmlChar *) "mergekey")))
 583     {
 584         yaz_log(YLOG_WARN, "No mergekey found in record");
 585         xmlFreeDoc(xdoc);
 586         return 0;
 587     }
 588
 589     res = nmem_malloc(se->nmem, sizeof(struct record));
 590     res->next = 0;
 591     res->client = cl;
 592     res->metadata = nmem_malloc(se->nmem,
 593             sizeof(struct record_metadata*) * service->num_metadata);
 594     memset(res->metadata, 0, sizeof(struct record_metadata*) * service->num_metadata);
 595
 596     mergekey_norm = (xmlChar *) nmem_strdup(se->nmem, (char*) mergekey);
 597     xmlFree(mergekey);
 598     normalize_mergekey((char *) mergekey_norm, 0);
 599
 600     cluster = reclist_insert(se->reclist, res, (char *) mergekey_norm,
 601                              &se->total_merged);
 602     if (global_parameters.dump_records)
 603         yaz_log(YLOG_LOG, "Cluster id %d from %s (#%d)", cluster->recid,
 604                 cl->database->database->url, cl->records);
 605     if (!cluster)
 606     {
 607         /* no room for record */
 608         xmlFreeDoc(xdoc);
 609         return 0;
 610     }
 611     relevance_newrec(se->relevance, cluster);
 612
 613     for (n = root->children; n; n = n->next)
 614     {
 615         if (type)
 616             xmlFree(type);
 617         if (value)
 618             xmlFree(value);
 619         type = value = 0;
 620
 621         if (n->type != XML_ELEMENT_NODE)
 622             continue;
 623         if (!strcmp((const char *) n->name, "metadata"))
 624         {
 625             struct conf_metadata *md = 0;
 626             struct conf_sortkey *sk = 0;
 627             struct record_metadata **wheretoput, *newm;
 628             int imeta;
 629             int first, last;
 630
 631             type = xmlGetProp(n, (xmlChar *) "type");
 632             value = xmlNodeListGetString(xdoc, n->children, 0);
 633
 634             if (!type || !value)
 635                 continue;
 636
 637             // First, find out what field we're looking at
 638             for (imeta = 0; imeta < service->num_metadata; imeta++)
 639                 if (!strcmp((const char *) type, service->metadata[imeta].name))
 640                 {
 641                     md = &service->metadata[imeta];
 642                     if (md->sortkey_offset >= 0)
 643                         sk = &service->sortkeys[md->sortkey_offset];
 644                     break;
 645                 }
 646             if (!md)
 647             {
 648                 yaz_log(YLOG_WARN, "Ignoring unknown metadata element: %s", type);
 649                 continue;
 650             }
 651
 652             // Find out where we are putting it
 653             if (md->merge == Metadata_merge_no)
 654                 wheretoput = &res->metadata[imeta];
 655             else
 656                 wheretoput = &cluster->metadata[imeta];
 657
 658             // Put it there
 659             newm = nmem_malloc(se->nmem, sizeof(struct record_metadata));
 660             newm->next = 0;
 661             if (md->type == Metadata_type_generic)
 662             {
 663                 char *p, *pe;
 664                 for (p = (char *) value; *p && isspace(*p); p++)
 665                     ;
 666                 for (pe = p + strlen(p) - 1;
 667                         pe > p && strchr(" ,/.:([", *pe); pe--)
 668                     *pe = '\0';
 669                 newm->data.text = nmem_strdup(se->nmem, p);
 670
 671             }
 672             else if (md->type == Metadata_type_year)
 673             {
 674                 if (extract_years((char *) value, &first, &last) < 0)
 675                     continue;
 676             }
 677             else
 678             {
 679                 yaz_log(YLOG_WARN, "Unknown type in metadata element %s", type);
 680                 continue;
 681             }
 682             if (md->type == Metadata_type_year && md->merge != Metadata_merge_range)
 683             {
 684                 yaz_log(YLOG_WARN, "Only range merging supported for years");
 685                 continue;
 686             }
 687             if (md->merge == Metadata_merge_unique)
 688             {
 689                 struct record_metadata *mnode;
 690                 for (mnode = *wheretoput; mnode; mnode = mnode->next)
 691                     if (!strcmp((const char *) mnode->data.text, newm->data.text))
 692                         break;
 693                 if (!mnode)
 694                 {
 695                     newm->next = *wheretoput;
 696                     *wheretoput = newm;
 697                 }
 698             }
 699             else if (md->merge == Metadata_merge_longest)
 700             {
 701                 if (!*wheretoput ||
 702                         strlen(newm->data.text) > strlen((*wheretoput)->data.text))
 703                 {
 704                     *wheretoput = newm;
 705                     if (sk)
 706                     {
 707                         char *s = nmem_strdup(se->nmem, newm->data.text);
 708                         if (!cluster->sortkeys[md->sortkey_offset])
 709                             cluster->sortkeys[md->sortkey_offset] =
 710                                 nmem_malloc(se->nmem, sizeof(union data_types));
 711                         normalize_mergekey(s,
 712                                 (sk->type == Metadata_sortkey_skiparticle));
 713                         cluster->sortkeys[md->sortkey_offset]->text = s;
 714                     }
 715                 }
 716             }
 717             else if (md->merge == Metadata_merge_all || md->merge == Metadata_merge_no)
 718             {
 719                 newm->next = *wheretoput;
 720                 *wheretoput = newm;
 721             }
 722             else if (md->merge == Metadata_merge_range)
 723             {
 724                 assert(md->type == Metadata_type_year);
 725                 if (!*wheretoput)
 726                 {
 727                     *wheretoput = newm;
 728                     (*wheretoput)->data.number.min = first;
 729                     (*wheretoput)->data.number.max = last;
 730                     if (sk)
 731                         cluster->sortkeys[md->sortkey_offset] = &newm->data;
 732                 }
 733                 else
 734                 {
 735                     if (first < (*wheretoput)->data.number.min)
 736                         (*wheretoput)->data.number.min = first;
 737                     if (last > (*wheretoput)->data.number.max)
 738                         (*wheretoput)->data.number.max = last;
 739                 }
 740 #ifdef GAGA
 741                 if (sk)
 742                 {
 743                     union data_types *sdata = cluster->sortkeys[md->sortkey_offset];
 744                     yaz_log(YLOG_LOG, "SK range: %d-%d", sdata->number.min, sdata->number.max);
 745                 }
 746 #endif
 747             }
 748             else
 749                 yaz_log(YLOG_WARN, "Don't know how to merge on element name %s", md->name);
 750
 751             if (md->rank)
 752                 relevance_countwords(se->relevance, cluster,
 753                                      (char *) value, md->rank);
 754             if (md->termlist)
 755             {
 756                 if (md->type == Metadata_type_year)
 757                 {
 758                     char year[64];
 759                     sprintf(year, "%d", last);
 760                     add_facet(se, (char *) type, year);
 761                     if (first != last)
 762                     {
 763                         sprintf(year, "%d", first);
 764                         add_facet(se, (char *) type, year);
 765                     }
 766                 }
 767                 else
 768                     add_facet(se, (char *) type, (char *) value);
 769             }
 770             xmlFree(type);
 771             xmlFree(value);
 772             type = value = 0;
 773         }
 774         else
 775             yaz_log(YLOG_WARN, "Unexpected element %s in internal record", n->name);
 776     }
 777     if (type)
 778         xmlFree(type);
 779     if (value)
 780         xmlFree(value);
 781
 782     xmlFreeDoc(xdoc);
 783
 784     relevance_donerecord(se->relevance, cluster);
 785     se->total_records++;
 786
 787     return res;
 788 }
 789
 790 // Retrieve first defined value for 'name' for given database.
 791 // Will be extended to take into account user associated with session
 792 char *session_setting_oneval(struct session_database *db, int offset)
 793 {
 794     if (!db->settings[offset])
 795         return "";
 796     return db->settings[offset]->value;
 797 }
 798
 799 static void ingest_records(struct client *cl, Z_Records *r)
 800 {
 801 #if USE_TIMING
 802     yaz_timing_t t = yaz_timing_create();
 803 #endif
 804     struct record *rec;
 805     struct session *s = cl->session;
 806     Z_NamePlusRecordList *rlist;
 807     int i;
 808
 809     if (r->which != Z_Records_DBOSD)
 810         return;
 811     rlist = r->u.databaseOrSurDiagnostics;
 812     for (i = 0; i < rlist->num_records; i++)
 813     {
 814         Z_NamePlusRecord *npr = rlist->records[i];
 815
 816         cl->records++;
 817         if (npr->which != Z_NamePlusRecord_databaseRecord)
 818         {
 819             yaz_log(YLOG_WARN,
 820                     "Unexpected record type, probably diagnostic %s",
 821                     cl->database->database->url);
 822             continue;
 823         }
 824
 825         rec = ingest_record(cl, npr->u.databaseRecord);
 826         if (!rec)
 827             continue;
 828     }
 829     if (s->watchlist[SESSION_WATCH_RECORDS].fun && rlist->num_records)
 830         session_alert_watch(s, SESSION_WATCH_RECORDS);
 831
 832 #if USE_TIMING
 833     yaz_timing_stop(t);
 834     yaz_log(YLOG_LOG, "ingest_records %6.5f %3.2f %3.2f",
 835             yaz_timing_get_real(t), yaz_timing_get_user(t),
 836             yaz_timing_get_sys(t));
 837     yaz_timing_destroy(&t);
 838 #endif
 839 }
 840
 841 static void do_presentResponse(IOCHAN i, Z_APDU *a)
 842 {
 843     struct connection *co = iochan_getdata(i);
 844     struct client *cl = co->client;
 845     Z_PresentResponse *r = a->u.presentResponse;
 846
 847     if (r->records) {
 848         Z_Records *recs = r->records;
 849         if (recs->which == Z_Records_NSD)
 850         {
 851             yaz_log(YLOG_WARN, "Non-surrogate diagnostic %s",
 852                     cl->database->database->url);
 853             cl->diagnostic = *recs->u.nonSurrogateDiagnostic->condition;
 854             cl->state = Client_Error;
 855         }
 856     }
 857
 858     if (!*r->presentStatus && cl->state != Client_Error)
 859     {
 860         yaz_log(YLOG_DEBUG, "Good Present response %s",
 861                 cl->database->database->url);
 862         ingest_records(cl, r->records);
 863         cl->state = Client_Idle;
 864     }
 865     else if (*r->presentStatus)
 866     {
 867         yaz_log(YLOG_WARN, "Bad Present response %s",
 868                 cl->database->database->url);
 869         cl->state = Client_Error;
 870     }
 871 }
 872
 873 static void handler(IOCHAN i, int event)
 874 {
 875     struct connection *co = iochan_getdata(i);
 876     struct client *cl = co->client;
 877     struct session *se = 0;
 878
 879     if (cl)
 880         se = cl->session;
 881     else
 882     {
 883         yaz_log(YLOG_WARN, "Destroying orphan connection");
 884         connection_destroy(co);
 885         return;
 886     }
 887
 888     if (co->state == Conn_Connecting && event & EVENT_OUTPUT)
 889     {
 890         int errcode;
 891         socklen_t errlen = sizeof(errcode);
 892
 893         if (getsockopt(cs_fileno(co->link), SOL_SOCKET, SO_ERROR, &errcode,
 894             &errlen) < 0 || errcode != 0)
 895         {
 896             client_fatal(cl);
 897             return;
 898         }
 899         else
 900         {
 901             yaz_log(YLOG_DEBUG, "Connect OK");
 902             co->state = Conn_Open;
 903             if (cl)
 904                 cl->state = Client_Connected;
 905         }
 906     }
 907
 908     else if (event & EVENT_INPUT)
 909     {
 910         int len = cs_get(co->link, &co->ibuf, &co->ibufsize);
 911
 912         if (len < 0)
 913         {
 914             yaz_log(YLOG_WARN|YLOG_ERRNO, "Error reading from %s",
 915                     cl->database->database->url);
 916             connection_destroy(co);
 917             return;
 918         }
 919         else if (len == 0)
 920         {
 921             yaz_log(YLOG_WARN, "EOF reading from %s", cl->database->database->url);
 922             connection_destroy(co);
 923             return;
 924         }
 925         else if (len > 1) // We discard input if we have no connection
 926         {
 927             co->state = Conn_Open;
 928
 929             if (cl && (cl->requestid == se->requestid || cl->state == Client_Initializing))
 930             {
 931                 Z_APDU *a;
 932
 933                 odr_reset(global_parameters.odr_in);
 934                 odr_setbuf(global_parameters.odr_in, co->ibuf, len, 0);
 935                 if (!z_APDU(global_parameters.odr_in, &a, 0, 0))
 936                 {
 937                     client_fatal(cl);
 938                     return;
 939                 }
 940                 switch (a->which)
 941                 {
 942                     case Z_APDU_initResponse:
 943                         do_initResponse(i, a);
 944                         break;
 945                     case Z_APDU_searchResponse:
 946                         do_searchResponse(i, a);
 947                         break;
 948                     case Z_APDU_presentResponse:
 949                         do_presentResponse(i, a);
 950                         break;
 951                     case Z_APDU_close:
 952                         do_closeResponse(i, a);
 953                         break;
 954                     default:
 955                         yaz_log(YLOG_WARN,
 956                                 "Unexpected Z39.50 response from %s",
 957                                 cl->database->database->url);
 958                         client_fatal(cl);
 959                         return;
 960                 }
 961                 // We aren't expecting staggered output from target
 962                 // if (cs_more(t->link))
 963                 //    iochan_setevent(i, EVENT_INPUT);
 964             }
 965             else  // we throw away response and go to idle mode
 966             {
 967                 yaz_log(YLOG_DEBUG, "Ignoring result of expired operation");
 968                 cl->state = Client_Idle;
 969             }
 970         }
 971         /* if len==1 we do nothing but wait for more input */
 972     }
 973
 974     if (cl->state == Client_Connected) {
 975         send_init(i);
 976     }
 977
 978     if (cl->state == Client_Idle)
 979     {
 980         if (cl->requestid != se->requestid && *se->query) {
 981             send_search(i);
 982         }
 983         else if (cl->hits > 0 && cl->records < global_parameters.toget &&
 984             cl->records < cl->hits) {
 985             send_present(i);
 986         }
 987     }
 988 }
 989
 990 // Disassociate connection from client
 991 static void connection_release(struct connection *co)
 992 {
 993     struct client *cl = co->client;
 994
 995     yaz_log(YLOG_DEBUG, "Connection release %s", co->host->hostport);
 996     if (!cl)
 997         return;
 998     cl->connection = 0;
 999     co->client = 0;
1000 }
1001
1002 // Close connection and recycle structure
1003 static void connection_destroy(struct connection *co)
1004 {
1005     struct host *h = co->host;
1006     cs_close(co->link);
1007     iochan_destroy(co->iochan);
1008
1009     yaz_log(YLOG_DEBUG, "Connection destroy %s", co->host->hostport);
1010     if (h->connections == co)
1011         h->connections = co->next;
1012     else
1013     {
1014         struct connection *pco;
1015         for (pco = h->connections; pco && pco->next != co; pco = pco->next)
1016             ;
1017         if (pco)
1018             pco->next = co->next;
1019         else
1020             abort();
1021     }
1022     if (co->client)
1023     {
1024         if (co->client->state != Client_Idle)
1025             co->client->state = Client_Disconnected;
1026         co->client->connection = 0;
1027     }
1028     co->next = connection_freelist;
1029     connection_freelist = co;
1030 }
1031
1032 // Creates a new connection for client, associated with the host of
1033 // client's database
1034 static struct connection *connection_create(struct client *cl)
1035 {
1036     struct connection *new;
1037     COMSTACK link;
1038     int res;
1039     void *addr;
1040
1041
1042     if (!(link = cs_create(tcpip_type, 0, PROTO_Z3950)))
1043         {
1044             yaz_log(YLOG_FATAL|YLOG_ERRNO, "Failed to create comstack");
1045             exit(1);
1046         }
1047
1048     if (0 == strlen(global_parameters.zproxy_override)){
1049         /* no Z39.50 proxy needed - direct connect */
1050         yaz_log(YLOG_DEBUG, "Connection create %s", cl->database->database->url);
1051
1052         if (!(addr = cs_straddr(link, cl->database->database->host->ipport)))
1053             {
1054                 yaz_log(YLOG_WARN|YLOG_ERRNO,
1055                         "Lookup of IP address %s failed",
1056                         cl->database->database->host->ipport);
1057                 return 0;
1058             }
1059
1060     } else {
1061         /* Z39.50 proxy connect */
1062         yaz_log(YLOG_DEBUG, "Connection create %s proxy %s",
1063                 cl->database->database->url, global_parameters.zproxy_override);
1064
1065         if (!(addr = cs_straddr(link, global_parameters.zproxy_override)))
1066             {
1067                 yaz_log(YLOG_WARN|YLOG_ERRNO,
1068                         "Lookup of IP address %s failed",
1069                         global_parameters.zproxy_override);
1070                 return 0;
1071             }
1072     }
1073
1074     res = cs_connect(link, addr);
1075     if (res < 0)
1076     {
1077         yaz_log(YLOG_WARN|YLOG_ERRNO, "cs_connect %s", cl->database->database->url);
1078         return 0;
1079     }
1080
1081     if ((new = connection_freelist))
1082         connection_freelist = new->next;
1083     else
1084     {
1085         new = xmalloc(sizeof (struct connection));
1086         new->ibuf = 0;
1087         new->ibufsize = 0;
1088     }
1089     new->state = Conn_Connecting;
1090     new->host = cl->database->database->host;
1091     new->next = new->host->connections;
1092     new->host->connections = new;
1093     new->client = cl;
1094     cl->connection = new;
1095     new->link = link;
1096
1097     new->iochan = iochan_create(cs_fileno(link), handler, 0);
1098     iochan_setdata(new->iochan, new);
1099     new->iochan->next = channel_list;
1100     channel_list = new->iochan;
1101     return new;
1102 }
1103
1104 // Close connection and set state to error
1105 static void client_fatal(struct client *cl)
1106 {
1107     yaz_log(YLOG_WARN, "Fatal error from %s", cl->database->database->url);
1108     connection_destroy(cl->connection);
1109     cl->state = Client_Error;
1110 }
1111
1112 // Ensure that client has a connection associated
1113 static int client_prep_connection(struct client *cl)
1114 {
1115     struct connection *co;
1116     struct session *se = cl->session;
1117     struct host *host = cl->database->database->host;
1118
1119     co = cl->connection;
1120
1121     yaz_log(YLOG_DEBUG, "Client prep %s", cl->database->database->url);
1122
1123     if (!co)
1124     {
1125         // See if someone else has an idle connection
1126         // We should look at timestamps here to select the longest-idle connection
1127         for (co = host->connections; co; co = co->next)
1128             if (co->state == Conn_Open && (!co->client || co->client->session != se))
1129                 break;
1130         if (co)
1131         {
1132             connection_release(co);
1133             cl->connection = co;
1134             co->client = cl;
1135         }
1136         else
1137             co = connection_create(cl);
1138     }
1139     if (co)
1140     {
1141         if (co->state == Conn_Connecting)
1142         {
1143             cl->state = Client_Connecting;
1144             iochan_setflag(co->iochan, EVENT_OUTPUT);
1145         }
1146         else if (co->state == Conn_Open)
1147         {
1148             if (cl->state == Client_Error || cl->state == Client_Disconnected)
1149                 cl->state = Client_Idle;
1150             iochan_setflag(co->iochan, EVENT_OUTPUT);
1151         }
1152         return 1;
1153     }
1154     else
1155         return 0;
1156 }
1157
1158 static struct client *client_create(void)
1159 {
1160     struct client *r;
1161     if (client_freelist)
1162     {
1163         r = client_freelist;
1164         client_freelist = client_freelist->next;
1165     }
1166     else
1167         r = xmalloc(sizeof(struct client));
1168     r->database = 0;
1169     r->connection = 0;
1170     r->session = 0;
1171     r->hits = 0;
1172     r->records = 0;
1173     r->setno = 0;
1174     r->requestid = -1;
1175     r->diagnostic = 0;
1176     r->state = Client_Disconnected;
1177     r->next = 0;
1178     return r;
1179 }
1180
1181 void client_destroy(struct client *c)
1182 {
1183     struct session *se = c->session;
1184     if (c == se->clients)
1185         se->clients = c->next;
1186     else
1187     {
1188         struct client *cc;
1189         for (cc = se->clients; cc && cc->next != c; cc = cc->next)
1190             ;
1191         if (cc)
1192             cc->next = c->next;
1193     }
1194     if (c->connection)
1195         connection_release(c->connection);
1196     c->next = client_freelist;
1197     client_freelist = c;
1198 }
1199
1200 void session_set_watch(struct session *s, int what, session_watchfun fun, void *data)
1201 {
1202     s->watchlist[what].fun = fun;
1203     s->watchlist[what].data = data;
1204 }
1205
1206 void session_alert_watch(struct session *s, int what)
1207 {
1208     if (!s->watchlist[what].fun)
1209         return;
1210     (*s->watchlist[what].fun)(s->watchlist[what].data);
1211     s->watchlist[what].fun = 0;
1212     s->watchlist[what].data = 0;
1213 }
1214
1215 //callback for grep_databases
1216 static void select_targets_callback(void *context, struct session_database *db)
1217 {
1218     struct session *se = (struct session*) context;
1219     struct client *cl = client_create();
1220     cl->database = db;
1221     cl->session = se;
1222     cl->next = se->clients;
1223     se->clients = cl;
1224 }
1225
1226 // Associates a set of clients with a session;
1227 // Note: Session-databases represent databases with per-session setting overrides
1228 int select_targets(struct session *se, struct database_criterion *crit)
1229 {
1230     while (se->clients)
1231         client_destroy(se->clients);
1232
1233     return session_grep_databases(se, crit, select_targets_callback);
1234 }
1235
1236 int session_active_clients(struct session *s)
1237 {
1238     struct client *c;
1239     int res = 0;
1240
1241     for (c = s->clients; c; c = c->next)
1242         if (c->connection && (c->state == Client_Connecting ||
1243                     c->state == Client_Initializing ||
1244                     c->state == Client_Searching ||
1245                     c->state == Client_Presenting))
1246             res++;
1247
1248     return res;
1249 }
1250
1251 // parses crit1=val1,crit2=val2|val3,...
1252 static struct database_criterion *parse_filter(NMEM m, const char *buf)
1253 {
1254     struct database_criterion *res = 0;
1255     char **values;
1256     int num;
1257     int i;
1258
1259     if (!buf || !*buf)
1260         return 0;
1261     nmem_strsplit(m, ",", buf,  &values, &num);
1262     for (i = 0; i < num; i++)
1263     {
1264         char **subvalues;
1265         int subnum;
1266         int subi;
1267         struct database_criterion *new = nmem_malloc(m, sizeof(*new));
1268         char *eq = strchr(values[i], '=');
1269         if (!eq)
1270         {
1271             yaz_log(YLOG_WARN, "Missing equal-sign in filter");
1272             return 0;
1273         }
1274         *(eq++) = '\0';
1275         new->name = values[i];
1276         nmem_strsplit(m, "|", eq, &subvalues, &subnum);
1277         new->values = 0;
1278         for (subi = 0; subi < subnum; subi++)
1279         {
1280             struct database_criterion_value *newv = nmem_malloc(m, sizeof(*newv));
1281             newv->value = subvalues[subi];
1282             newv->next = new->values;
1283             new->values = newv;
1284         }
1285         new->next = res;
1286         res = new;
1287     }
1288     return res;
1289 }
1290
1291 char *search(struct session *se, char *query, char *filter)
1292 {
1293     int live_channels = 0;
1294     struct client *cl;
1295     struct database_criterion *criteria;
1296
1297     yaz_log(YLOG_DEBUG, "Search");
1298
1299     nmem_reset(se->nmem);
1300     criteria = parse_filter(se->nmem, filter);
1301     strcpy(se->query, query);
1302     se->requestid++;
1303     select_targets(se, criteria);
1304     for (cl = se->clients; cl; cl = cl->next)
1305     {
1306         if (client_prep_connection(cl))
1307             live_channels++;
1308     }
1309     if (live_channels)
1310     {
1311         int maxrecs = live_channels * global_parameters.toget;
1312         se->num_termlists = 0;
1313         se->reclist = reclist_create(se->nmem, maxrecs);
1314         // This will be initialized in send_search()
1315         se->relevance = 0;
1316         se->total_records = se->total_hits = se->total_merged = 0;
1317         se->expected_maxrecs = maxrecs;
1318     }
1319     else
1320         return "NOTARGETS";
1321
1322     return 0;
1323 }
1324
1325 // Apply a session override to a database
1326 void session_apply_setting(struct session *se, char *dbname, char *setting, char *value)
1327 {
1328     struct session_database *sdb;
1329
1330     for (sdb = se->databases; sdb; sdb = sdb->next)
1331         if (!strcmp(dbname, sdb->database->url))
1332         {
1333             struct setting *new = nmem_malloc(se->session_nmem, sizeof(*new));
1334             int offset = settings_offset(setting);
1335
1336             if (offset < 0)
1337             {
1338                 yaz_log(YLOG_WARN, "Unknown setting %s", setting);
1339                 return;
1340             }
1341             new->precedence = 0;
1342             new->target = dbname;
1343             new->name = setting;
1344             new->value = value;
1345             new->user = "";
1346             new->next = sdb->settings[offset];
1347             sdb->settings[offset] = new;
1348             break;
1349         }
1350     if (!sdb)
1351         yaz_log(YLOG_WARN, "Unknown database in setting override: %s", dbname);
1352 }
1353
1354 void session_init_databases_fun(void *context, struct database *db)
1355 {
1356     struct session *se = (struct session *) context;
1357     struct session_database *new = nmem_malloc(se->session_nmem, sizeof(*new));
1358     int num = settings_num();
1359     int i;
1360
1361     new->database = db;
1362     new->settings = nmem_malloc(se->session_nmem, sizeof(struct settings *) * num);
1363     for (i = 0; i < num; i++)
1364         new->settings[i] = db->settings[i];
1365     new->next = se->databases;
1366     se->databases = new;
1367 }
1368
1369 // Initialize session_database list -- this represents this session's view
1370 // of the database list -- subject to modification by the settings ws command
1371 void session_init_databases(struct session *se)
1372 {
1373     se->databases = 0;
1374     grep_databases(se, 0, session_init_databases_fun);
1375 }
1376
1377 void destroy_session(struct session *s)
1378 {
1379     yaz_log(YLOG_LOG, "Destroying session");
1380     while (s->clients)
1381         client_destroy(s->clients);
1382     nmem_destroy(s->nmem);
1383     wrbuf_destroy(s->wrbuf);
1384 }
1385
1386 struct session *new_session(NMEM nmem)
1387 {
1388     int i;
1389     struct session *session = nmem_malloc(nmem, sizeof(*session));
1390
1391     yaz_log(YLOG_DEBUG, "New Pazpar2 session");
1392
1393     session->total_hits = 0;
1394     session->total_records = 0;
1395     session->num_termlists = 0;
1396     session->reclist = 0;
1397     session->requestid = -1;
1398     session->clients = 0;
1399     session->expected_maxrecs = 0;
1400     session->query[0] = '\0';
1401     session->session_nmem = nmem;
1402     session->nmem = nmem_create();
1403     session->wrbuf = wrbuf_alloc();
1404     session_init_databases(session);
1405     for (i = 0; i <= SESSION_WATCH_MAX; i++)
1406     {
1407         session->watchlist[i].data = 0;
1408         session->watchlist[i].fun = 0;
1409     }
1410
1411     return session;
1412 }
1413
1414 struct hitsbytarget *hitsbytarget(struct session *se, int *count)
1415 {
1416     static struct hitsbytarget res[1000]; // FIXME MM
1417     struct client *cl;
1418
1419     *count = 0;
1420     for (cl = se->clients; cl; cl = cl->next)
1421     {
1422         char *name = session_setting_oneval(cl->database, PZ_NAME);
1423
1424         res[*count].id = cl->database->database->url;
1425         res[*count].name = *name ? name : "Unknown";
1426         res[*count].hits = cl->hits;
1427         res[*count].records = cl->records;
1428         res[*count].diagnostic = cl->diagnostic;
1429         res[*count].state = client_states[cl->state];
1430         res[*count].connected  = cl->connection ? 1 : 0;
1431         (*count)++;
1432     }
1433
1434     return res;
1435 }
1436
1437 struct termlist_score **termlist(struct session *s, const char *name, int *num)
1438 {
1439     int i;
1440
1441     for (i = 0; i < s->num_termlists; i++)
1442         if (!strcmp((const char *) s->termlists[i].name, name))
1443             return termlist_highscore(s->termlists[i].termlist, num);
1444     return 0;
1445 }
1446
1447 #ifdef MISSING_HEADERS
1448 void report_nmem_stats(void)
1449 {
1450     size_t in_use, is_free;
1451
1452     nmem_get_memory_in_use(&in_use);
1453     nmem_get_memory_free(&is_free);
1454
1455     yaz_log(YLOG_LOG, "nmem stat: use=%ld free=%ld",
1456             (long) in_use, (long) is_free);
1457 }
1458 #endif
1459
1460 struct record_cluster *show_single(struct session *s, int id)
1461 {
1462     struct record_cluster *r;
1463
1464     reclist_rewind(s->reclist);
1465     while ((r = reclist_read_record(s->reclist)))
1466         if (r->recid == id)
1467             return r;
1468     return 0;
1469 }
1470
1471 struct record_cluster **show(struct session *s, struct reclist_sortparms *sp, int start,
1472         int *num, int *total, int *sumhits, NMEM nmem_show)
1473 {
1474     struct record_cluster **recs = nmem_malloc(nmem_show, *num
1475                                        * sizeof(struct record_cluster *));
1476     struct reclist_sortparms *spp;
1477     int i;
1478 #if USE_TIMING
1479     yaz_timing_t t = yaz_timing_create();
1480 #endif
1481
1482     for (spp = sp; spp; spp = spp->next)
1483         if (spp->type == Metadata_sortkey_relevance)
1484         {
1485             relevance_prepare_read(s->relevance, s->reclist);
1486             break;
1487         }
1488     reclist_sort(s->reclist, sp);
1489
1490     *total = s->reclist->num_records;
1491     *sumhits = s->total_hits;
1492
1493     for (i = 0; i < start; i++)
1494         if (!reclist_read_record(s->reclist))
1495         {
1496             *num = 0;
1497             recs = 0;
1498             break;
1499         }
1500
1501     for (i = 0; i < *num; i++)
1502     {
1503         struct record_cluster *r = reclist_read_record(s->reclist);
1504         if (!r)
1505         {
1506             *num = i;
1507             break;
1508         }
1509         recs[i] = r;
1510     }
1511 #if USE_TIMING
1512     yaz_timing_stop(t);
1513     yaz_log(YLOG_LOG, "show %6.5f %3.2f %3.2f",
1514             yaz_timing_get_real(t), yaz_timing_get_user(t),
1515             yaz_timing_get_sys(t));
1516     yaz_timing_destroy(&t);
1517 #endif
1518     return recs;
1519 }
1520
1521 void statistics(struct session *se, struct statistics *stat)
1522 {
1523     struct client *cl;
1524     int count = 0;
1525
1526     memset(stat, 0, sizeof(*stat));
1527     for (cl = se->clients; cl; cl = cl->next)
1528     {
1529         if (!cl->connection)
1530             stat->num_no_connection++;
1531         switch (cl->state)
1532         {
1533             case Client_Connecting: stat->num_connecting++; break;
1534             case Client_Initializing: stat->num_initializing++; break;
1535             case Client_Searching: stat->num_searching++; break;
1536             case Client_Presenting: stat->num_presenting++; break;
1537             case Client_Idle: stat->num_idle++; break;
1538             case Client_Failed: stat->num_failed++; break;
1539             case Client_Error: stat->num_error++; break;
1540             default: break;
1541         }
1542         count++;
1543     }
1544     stat->num_hits = se->total_hits;
1545     stat->num_records = se->total_records;
1546
1547     stat->num_clients = count;
1548 }
1549
1550 static void start_http_listener(void)
1551 {
1552     char hp[128] = "";
1553     struct conf_server *ser = global_parameters.server;
1554
1555     if (*global_parameters.listener_override)
1556         strcpy(hp, global_parameters.listener_override);
1557     else
1558     {
1559         strcpy(hp, ser->host ? ser->host : "");
1560         if (ser->port)
1561         {
1562             if (*hp)
1563                 strcat(hp, ":");
1564             sprintf(hp + strlen(hp), "%d", ser->port);
1565         }
1566     }
1567     http_init(hp);
1568 }
1569
1570 static void start_proxy(void)
1571 {
1572     char hp[128] = "";
1573     struct conf_server *ser = global_parameters.server;
1574
1575     if (*global_parameters.proxy_override)
1576         strcpy(hp, global_parameters.proxy_override);
1577     else if (ser->proxy_host || ser->proxy_port)
1578     {
1579         strcpy(hp, ser->proxy_host ? ser->proxy_host : "");
1580         if (ser->proxy_port)
1581         {
1582             if (*hp)
1583                 strcat(hp, ":");
1584             sprintf(hp + strlen(hp), "%d", ser->proxy_port);
1585         }
1586     }
1587     else
1588         return;
1589
1590     http_set_proxyaddr(hp, ser->myurl ? ser->myurl : "");
1591 }
1592
1593 static void start_zproxy(void)
1594 {
1595     struct conf_server *ser = global_parameters.server;
1596
1597     if (*global_parameters.zproxy_override){
1598         yaz_log(YLOG_LOG, "Z39.50 proxy  %s",
1599                 global_parameters.zproxy_override);
1600         return;
1601     }
1602
1603     else if (ser->zproxy_host || ser->zproxy_port)
1604     {
1605         char hp[128] = "";
1606
1607         strcpy(hp, ser->zproxy_host ? ser->zproxy_host : "");
1608         if (ser->zproxy_port)
1609         {
1610             if (*hp)
1611                 strcat(hp, ":");
1612             else
1613                 strcat(hp, "@:");
1614
1615             sprintf(hp + strlen(hp), "%d", ser->zproxy_port);
1616         }
1617         strcpy(global_parameters.zproxy_override, hp);
1618         yaz_log(YLOG_LOG, "Z39.50 proxy  %s",
1619                 global_parameters.zproxy_override);
1620
1621     }
1622     else
1623         return;
1624 }
1625
1626
1627
1628 int main(int argc, char **argv)
1629 {
1630     int ret;
1631     char *arg;
1632
1633     if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
1634         yaz_log(YLOG_WARN|YLOG_ERRNO, "signal");
1635
1636     yaz_log_init(YLOG_DEFAULT_LEVEL, "pazpar2", 0);
1637
1638     while ((ret = options("t:f:x:h:p:z:s:d", argv, argc, &arg)) != -2)
1639     {
1640         switch (ret) {
1641             case 'f':
1642                 if (!read_config(arg))
1643                     exit(1);
1644                 break;
1645             case 'h':
1646                 strcpy(global_parameters.listener_override, arg);
1647                 break;
1648             case 'p':
1649                 strcpy(global_parameters.proxy_override, arg);
1650                 break;
1651             case 'z':
1652                 strcpy(global_parameters.zproxy_override, arg);
1653                 break;
1654             case 't':
1655                 strcpy(global_parameters.settings_path_override, arg);
1656                 break;
1657             case 's':
1658                 load_simpletargets(arg);
1659                 break;
1660             case 'd':
1661                 global_parameters.dump_records = 1;
1662                 break;
1663             default:
1664                 fprintf(stderr, "Usage: pazpar2\n"
1665                         "    -f configfile\n"
1666                         "    -h [host:]port          (REST protocol listener)\n"
1667                         "    -C cclconfig\n"
1668                         "    -s simpletargetfile\n"
1669                         "    -p hostname[:portno]    (HTTP proxy)\n"
1670                         "    -z hostname[:portno]    (Z39.50 proxy)\n"
1671                         "    -d                      (show internal records)\n");
1672                 exit(1);
1673         }
1674     }
1675
1676     if (!config)
1677     {
1678         yaz_log(YLOG_FATAL, "Load config with -f");
1679         exit(1);
1680     }
1681     global_parameters.server = config->servers;
1682
1683     start_http_listener();
1684     start_proxy();
1685     start_zproxy();
1686
1687     if (*global_parameters.settings_path_override)
1688         settings_read(global_parameters.settings_path_override);
1689     else if (global_parameters.server->settings)
1690         settings_read(global_parameters.server->settings);
1691     else
1692         yaz_log(YLOG_WARN, "No settings-directory specified. Problems may well ensue!");
1693     prepare_databases();
1694     global_parameters.odr_in = odr_createmem(ODR_DECODE);
1695     global_parameters.odr_out = odr_createmem(ODR_ENCODE);
1696
1697     event_loop(&channel_list);
1698
1699     return 0;
1700 }
1701
1702 /*
1703  * Local variables:
1704  * c-basic-offset: 4
1705  * indent-tabs-mode: nil
1706  * End:
1707  * vim: shiftwidth=4 tabstop=8 expandtab
1708  */