src/pazpar2.c

   1 /* $Id: pazpar2.c,v 1.70 2007-04-10 08:48:56 adam 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 *s, struct 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 database *db = cl->database;
 145     struct session *se = cl->session;
 146     char *auth = session_setting_oneval(se, db, PZ_AUTHENTICATION);
 147
 148     if (auth)
 149     {
 150         Z_IdAuthentication *idAuth = odr_malloc(global_parameters.odr_out,
 151                 sizeof(*idAuth));
 152         idAuth->which = Z_IdAuthentication_open;
 153         idAuth->u.open = auth;
 154         req->idAuthentication = idAuth;
 155     }
 156 }
 157
 158 static void send_init(IOCHAN i)
 159 {
 160
 161     struct connection *co = iochan_getdata(i);
 162     struct client *cl = co->client;
 163     Z_APDU *a = zget_APDU(global_parameters.odr_out, Z_APDU_initRequest);
 164
 165     a->u.initRequest->implementationId = global_parameters.implementationId;
 166     a->u.initRequest->implementationName = global_parameters.implementationName;
 167     a->u.initRequest->implementationVersion =
 168         global_parameters.implementationVersion;
 169     ODR_MASK_SET(a->u.initRequest->options, Z_Options_search);
 170     ODR_MASK_SET(a->u.initRequest->options, Z_Options_present);
 171     ODR_MASK_SET(a->u.initRequest->options, Z_Options_namedResultSets);
 172
 173     ODR_MASK_SET(a->u.initRequest->protocolVersion, Z_ProtocolVersion_1);
 174     ODR_MASK_SET(a->u.initRequest->protocolVersion, Z_ProtocolVersion_2);
 175     ODR_MASK_SET(a->u.initRequest->protocolVersion, Z_ProtocolVersion_3);
 176
 177     init_authentication(cl, a->u.initRequest);
 178
 179     /* add virtual host if tunneling through Z39.50 proxy */
 180
 181     if (0 < strlen(global_parameters.zproxy_override)
 182         && 0 < strlen(cl->database->url))
 183         yaz_oi_set_string_oidval(&a->u.initRequest->otherInfo,
 184                                  global_parameters.odr_out, VAL_PROXY,
 185                                  1, cl->database->url);
 186
 187     if (send_apdu(cl, a) >= 0)
 188     {
 189         iochan_setflags(i, EVENT_INPUT);
 190         cl->state = Client_Initializing;
 191     }
 192     else
 193         cl->state = Client_Error;
 194     odr_reset(global_parameters.odr_out);
 195 }
 196
 197 static void pull_terms(NMEM nmem, struct ccl_rpn_node *n, char **termlist, int *num)
 198 {
 199     switch (n->kind)
 200     {
 201         case CCL_RPN_AND:
 202         case CCL_RPN_OR:
 203         case CCL_RPN_NOT:
 204         case CCL_RPN_PROX:
 205             pull_terms(nmem, n->u.p[0], termlist, num);
 206             pull_terms(nmem, n->u.p[1], termlist, num);
 207             break;
 208         case CCL_RPN_TERM:
 209             termlist[(*num)++] = nmem_strdup(nmem, n->u.t.term);
 210             break;
 211         default: // NOOP
 212             break;
 213     }
 214 }
 215
 216 // Extract terms from query into null-terminated termlist
 217 static void extract_terms(NMEM nmem, struct ccl_rpn_node *query, char **termlist)
 218 {
 219     int num = 0;
 220
 221     pull_terms(nmem, query, termlist, &num);
 222     termlist[num] = 0;
 223 }
 224
 225 static void send_search(IOCHAN i)
 226 {
 227     struct connection *co = iochan_getdata(i);
 228     struct client *cl = co->client;
 229     struct session *se = cl->session;
 230     struct database *db = cl->database;
 231     Z_APDU *a = zget_APDU(global_parameters.odr_out, Z_APDU_searchRequest);
 232     int ndb, cerror, cpos;
 233     char **databaselist;
 234     Z_Query *zquery;
 235     struct ccl_rpn_node *cn;
 236     int ssub = 0, lslb = 100000, mspn = 10;
 237     char *recsyn;
 238     char *piggyback;
 239
 240     yaz_log(YLOG_DEBUG, "Sending search");
 241
 242     cn = ccl_find_str(db->ccl_map, se->query, &cerror, &cpos);
 243     if (!cn)
 244         return;
 245
 246     if (!se->relevance)
 247     {
 248         // Initialize relevance structure with query terms
 249         char *p[512];
 250         extract_terms(se->nmem, cn, p);
 251         se->relevance = relevance_create(se->nmem, (const char **) p,
 252                 se->expected_maxrecs);
 253     }
 254
 255     a->u.searchRequest->query = zquery = odr_malloc(global_parameters.odr_out,
 256             sizeof(Z_Query));
 257     zquery->which = Z_Query_type_1;
 258     zquery->u.type_1 = ccl_rpn_query(global_parameters.odr_out, cn);
 259     ccl_rpn_delete(cn);
 260
 261     for (ndb = 0; db->databases[ndb]; ndb++)
 262         ;
 263     databaselist = odr_malloc(global_parameters.odr_out, sizeof(char*) * ndb);
 264     for (ndb = 0; db->databases[ndb]; ndb++)
 265         databaselist[ndb] = db->databases[ndb];
 266
 267     if (!(piggyback = session_setting_oneval(se, db, PZ_PIGGYBACK)) || *piggyback == '1')
 268     {
 269         if ((recsyn = session_setting_oneval(se, db, PZ_REQUESTSYNTAX)))
 270             a->u.searchRequest->preferredRecordSyntax =
 271                     yaz_str_to_z3950oid(global_parameters.odr_out,
 272                     CLASS_RECSYN, recsyn);
 273         a->u.searchRequest->smallSetUpperBound = &ssub;
 274         a->u.searchRequest->largeSetLowerBound = &lslb;
 275         a->u.searchRequest->mediumSetPresentNumber = &mspn;
 276     }
 277     a->u.searchRequest->resultSetName = "Default";
 278     a->u.searchRequest->databaseNames = databaselist;
 279     a->u.searchRequest->num_databaseNames = ndb;
 280
 281     if (send_apdu(cl, a) >= 0)
 282     {
 283         iochan_setflags(i, EVENT_INPUT);
 284         cl->state = Client_Searching;
 285         cl->requestid = se->requestid;
 286     }
 287     else
 288         cl->state = Client_Error;
 289
 290     odr_reset(global_parameters.odr_out);
 291 }
 292
 293 static void send_present(IOCHAN i)
 294 {
 295     struct connection *co = iochan_getdata(i);
 296     struct client *cl = co->client;
 297     struct session *se = cl->session;
 298     struct database *db = cl->database;
 299     Z_APDU *a = zget_APDU(global_parameters.odr_out, Z_APDU_presentRequest);
 300     int toget;
 301     int start = cl->records + 1;
 302     char *recsyn;
 303
 304     toget = global_parameters.chunk;
 305     if (toget > global_parameters.toget - cl->records)
 306         toget = global_parameters.toget - cl->records;
 307     if (toget > cl->hits - cl->records)
 308         toget = cl->hits - cl->records;
 309
 310     yaz_log(YLOG_DEBUG, "Trying to present %d records\n", toget);
 311
 312     a->u.presentRequest->resultSetStartPoint = &start;
 313     a->u.presentRequest->numberOfRecordsRequested = &toget;
 314
 315     a->u.presentRequest->resultSetId = "Default";
 316
 317     if ((recsyn = session_setting_oneval(se, db, PZ_REQUESTSYNTAX)))
 318         a->u.presentRequest->preferredRecordSyntax =
 319                 yaz_str_to_z3950oid(global_parameters.odr_out,
 320                 CLASS_RECSYN, recsyn);
 321
 322     if (send_apdu(cl, a) >= 0)
 323     {
 324         iochan_setflags(i, EVENT_INPUT);
 325         cl->state = Client_Presenting;
 326     }
 327     else
 328         cl->state = Client_Error;
 329     odr_reset(global_parameters.odr_out);
 330 }
 331
 332 static void do_initResponse(IOCHAN i, Z_APDU *a)
 333 {
 334     struct connection *co = iochan_getdata(i);
 335     struct client *cl = co->client;
 336     Z_InitResponse *r = a->u.initResponse;
 337
 338     yaz_log(YLOG_DEBUG, "Init response %s", cl->database->url);
 339
 340     if (*r->result)
 341     {
 342         cl->state = Client_Idle;
 343     }
 344     else
 345         cl->state = Client_Failed; // FIXME need to do something to the connection
 346 }
 347
 348 static void do_searchResponse(IOCHAN i, Z_APDU *a)
 349 {
 350     struct connection *co = iochan_getdata(i);
 351     struct client *cl = co->client;
 352     struct session *se = cl->session;
 353     Z_SearchResponse *r = a->u.searchResponse;
 354
 355     yaz_log(YLOG_DEBUG, "Search response %s (status=%d)",
 356             cl->database->url, *r->searchStatus);
 357
 358     if (*r->searchStatus)
 359     {
 360         cl->hits = *r->resultCount;
 361         se->total_hits += cl->hits;
 362         if (r->presentStatus && !*r->presentStatus && r->records)
 363         {
 364             yaz_log(YLOG_DEBUG, "Records in search response %s",
 365                     cl->database->url);
 366             ingest_records(cl, r->records);
 367         }
 368         cl->state = Client_Idle;
 369     }
 370     else
 371     {          /*"FAILED"*/
 372         cl->hits = 0;
 373         cl->state = Client_Error;
 374         if (r->records) {
 375             Z_Records *recs = r->records;
 376             if (recs->which == Z_Records_NSD)
 377             {
 378                 yaz_log(YLOG_WARN,
 379                         "Search response: Non-surrogate diagnostic %s",
 380                         cl->database->url);
 381                 cl->diagnostic = *recs->u.nonSurrogateDiagnostic->condition;
 382                 cl->state = Client_Error;
 383             }
 384         }
 385     }
 386 }
 387
 388 static void do_closeResponse(IOCHAN i, Z_APDU *a)
 389 {
 390     struct connection *co = iochan_getdata(i);
 391     struct client *cl = co->client;
 392     /* Z_Close *r = a->u.close; */
 393
 394     yaz_log(YLOG_WARN, "Close response %s", cl->database->url);
 395
 396     cl->state = Client_Failed;
 397     connection_destroy(co);
 398 }
 399
 400
 401 char *normalize_mergekey(char *buf, int skiparticle)
 402 {
 403     char *p = buf, *pout = buf;
 404
 405     if (skiparticle)
 406     {
 407         char firstword[64];
 408         char articles[] = "the den der die des an a "; // must end in space
 409
 410         while (*p && !isalnum(*p))
 411             p++;
 412         pout = firstword;
 413         while (*p && *p != ' ' && pout - firstword < 62)
 414             *(pout++) = tolower(*(p++));
 415         *(pout++) = ' ';
 416         *(pout++) = '\0';
 417         if (!strstr(articles, firstword))
 418             p = buf;
 419         pout = buf;
 420     }
 421
 422     while (*p)
 423     {
 424         while (*p && !isalnum(*p))
 425             p++;
 426         while (isalnum(*p))
 427             *(pout++) = tolower(*(p++));
 428         if (*p)
 429             *(pout++) = ' ';
 430         while (*p && !isalnum(*p))
 431             p++;
 432     }
 433     if (buf != pout)
 434         do {
 435             *(pout--) = '\0';
 436         }
 437         while (pout > buf && *pout == ' ');
 438
 439     return buf;
 440 }
 441
 442 static void add_facet(struct session *s, const char *type, const char *value)
 443 {
 444     int i;
 445
 446     if (!*value)
 447         return;
 448     for (i = 0; i < s->num_termlists; i++)
 449         if (!strcmp(s->termlists[i].name, type))
 450             break;
 451     if (i == s->num_termlists)
 452     {
 453         if (i == SESSION_MAX_TERMLISTS)
 454         {
 455             yaz_log(YLOG_FATAL, "Too many termlists");
 456             exit(1);
 457         }
 458         s->termlists[i].name = nmem_strdup(s->nmem, type);
 459         s->termlists[i].termlist = termlist_create(s->nmem, s->expected_maxrecs, 15);
 460         s->num_termlists = i + 1;
 461     }
 462     termlist_insert(s->termlists[i].termlist, value);
 463 }
 464
 465 static xmlDoc *normalize_record(struct client *cl, Z_External *rec)
 466 {
 467     struct database_retrievalmap *m;
 468     struct database *db = cl->database;
 469     xmlNode *res;
 470     xmlDoc *rdoc;
 471
 472     // First normalize to XML
 473     if (db->yaz_marc)
 474     {
 475         char *buf;
 476         int len;
 477         if (rec->which != Z_External_octet)
 478         {
 479             yaz_log(YLOG_WARN, "Unexpected external branch, probably BER %s",
 480                     cl->database->url);
 481             return 0;
 482         }
 483         buf = (char*) rec->u.octet_aligned->buf;
 484         len = rec->u.octet_aligned->len;
 485         if (yaz_marc_read_iso2709(db->yaz_marc, buf, len) < 0)
 486         {
 487             yaz_log(YLOG_WARN, "Failed to decode MARC %s",
 488                     cl->database->url);
 489             return 0;
 490         }
 491         if (yaz_marc_write_xml(db->yaz_marc, &res,
 492                     "http://www.loc.gov/MARC21/slim", 0, 0) < 0)
 493         {
 494             yaz_log(YLOG_WARN, "Failed to encode as XML %s",
 495                     cl->database->url);
 496             return 0;
 497         }
 498         rdoc = xmlNewDoc((xmlChar *) "1.0");
 499         xmlDocSetRootElement(rdoc, res);
 500     }
 501     else
 502     {
 503         yaz_log(YLOG_FATAL, "Unknown native_syntax in normalize_record");
 504         exit(1);
 505     }
 506
 507     if (global_parameters.dump_records)
 508     {
 509         fprintf(stderr, "Input Record (normalized):\n----------------\n");
 510 #if LIBXML_VERSION >= 20600
 511         xmlDocFormatDump(stderr, rdoc, 1);
 512 #else
 513         xmlDocDump(stderr, rdoc);
 514 #endif
 515     }
 516
 517     for (m = db->map; m; m = m->next)
 518     {
 519         xmlDoc *new;
 520         if (!(new = xsltApplyStylesheet(m->stylesheet, rdoc, 0)))
 521         {
 522             yaz_log(YLOG_WARN, "XSLT transformation failed");
 523             return 0;
 524         }
 525         xmlFreeDoc(rdoc);
 526         rdoc = new;
 527     }
 528     if (global_parameters.dump_records)
 529     {
 530         fprintf(stderr, "Record:\n----------------\n");
 531 #if LIBXML_VERSION >= 20600
 532         xmlDocFormatDump(stderr, rdoc, 1);
 533 #else
 534         xmlDocDump(stderr, rdoc);
 535 #endif
 536     }
 537     return rdoc;
 538 }
 539
 540 // Extract what appears to be years from buf, storing highest and
 541 // lowest values.
 542 static int extract_years(const char *buf, int *first, int *last)
 543 {
 544     *first = -1;
 545     *last = -1;
 546     while (*buf)
 547     {
 548         const char *e;
 549         int len;
 550
 551         while (*buf && !isdigit(*buf))
 552             buf++;
 553         len = 0;
 554         for (e = buf; *e && isdigit(*e); e++)
 555             len++;
 556         if (len == 4)
 557         {
 558             int value = atoi(buf);
 559             if (*first < 0 || value < *first)
 560                 *first = value;
 561             if (*last < 0 || value > *last)
 562                 *last = value;
 563         }
 564         buf = e;
 565     }
 566     return *first;
 567 }
 568
 569 static struct record *ingest_record(struct client *cl, Z_External *rec)
 570 {
 571     xmlDoc *xdoc = normalize_record(cl, rec);
 572     xmlNode *root, *n;
 573     struct record *res;
 574     struct record_cluster *cluster;
 575     struct session *se = cl->session;
 576     xmlChar *mergekey, *mergekey_norm;
 577     xmlChar *type = 0;
 578     xmlChar *value = 0;
 579     struct conf_service *service = global_parameters.server->service;
 580
 581     if (!xdoc)
 582         return 0;
 583
 584     root = xmlDocGetRootElement(xdoc);
 585     if (!(mergekey = xmlGetProp(root, (xmlChar *) "mergekey")))
 586     {
 587         yaz_log(YLOG_WARN, "No mergekey found in record");
 588         xmlFreeDoc(xdoc);
 589         return 0;
 590     }
 591
 592     res = nmem_malloc(se->nmem, sizeof(struct record));
 593     res->next = 0;
 594     res->client = cl;
 595     res->metadata = nmem_malloc(se->nmem,
 596             sizeof(struct record_metadata*) * service->num_metadata);
 597     memset(res->metadata, 0, sizeof(struct record_metadata*) * service->num_metadata);
 598
 599     mergekey_norm = (xmlChar *) nmem_strdup(se->nmem, (char*) mergekey);
 600     xmlFree(mergekey);
 601     normalize_mergekey((char *) mergekey_norm, 0);
 602
 603     cluster = reclist_insert(se->reclist, res, (char *) mergekey_norm,
 604                              &se->total_merged);
 605     if (global_parameters.dump_records)
 606         yaz_log(YLOG_LOG, "Cluster id %d from %s (#%d)", cluster->recid,
 607                 cl->database->url, cl->records);
 608     if (!cluster)
 609     {
 610         /* no room for record */
 611         xmlFreeDoc(xdoc);
 612         return 0;
 613     }
 614     relevance_newrec(se->relevance, cluster);
 615
 616     for (n = root->children; n; n = n->next)
 617     {
 618         if (type)
 619             xmlFree(type);
 620         if (value)
 621             xmlFree(value);
 622         type = value = 0;
 623
 624         if (n->type != XML_ELEMENT_NODE)
 625             continue;
 626         if (!strcmp((const char *) n->name, "metadata"))
 627         {
 628             struct conf_metadata *md = 0;
 629             struct conf_sortkey *sk = 0;
 630             struct record_metadata **wheretoput, *newm;
 631             int imeta;
 632             int first, last;
 633
 634             type = xmlGetProp(n, (xmlChar *) "type");
 635             value = xmlNodeListGetString(xdoc, n->children, 0);
 636
 637             if (!type || !value)
 638                 continue;
 639
 640             // First, find out what field we're looking at
 641             for (imeta = 0; imeta < service->num_metadata; imeta++)
 642                 if (!strcmp((const char *) type, service->metadata[imeta].name))
 643                 {
 644                     md = &service->metadata[imeta];
 645                     if (md->sortkey_offset >= 0)
 646                         sk = &service->sortkeys[md->sortkey_offset];
 647                     break;
 648                 }
 649             if (!md)
 650             {
 651                 yaz_log(YLOG_WARN, "Ignoring unknown metadata element: %s", type);
 652                 continue;
 653             }
 654
 655             // Find out where we are putting it
 656             if (md->merge == Metadata_merge_no)
 657                 wheretoput = &res->metadata[imeta];
 658             else
 659                 wheretoput = &cluster->metadata[imeta];
 660
 661             // Put it there
 662             newm = nmem_malloc(se->nmem, sizeof(struct record_metadata));
 663             newm->next = 0;
 664             if (md->type == Metadata_type_generic)
 665             {
 666                 char *p, *pe;
 667                 for (p = (char *) value; *p && isspace(*p); p++)
 668                     ;
 669                 for (pe = p + strlen(p) - 1;
 670                         pe > p && strchr(" ,/.:([", *pe); pe--)
 671                     *pe = '\0';
 672                 newm->data.text = nmem_strdup(se->nmem, p);
 673
 674             }
 675             else if (md->type == Metadata_type_year)
 676             {
 677                 if (extract_years((char *) value, &first, &last) < 0)
 678                     continue;
 679             }
 680             else
 681             {
 682                 yaz_log(YLOG_WARN, "Unknown type in metadata element %s", type);
 683                 continue;
 684             }
 685             if (md->type == Metadata_type_year && md->merge != Metadata_merge_range)
 686             {
 687                 yaz_log(YLOG_WARN, "Only range merging supported for years");
 688                 continue;
 689             }
 690             if (md->merge == Metadata_merge_unique)
 691             {
 692                 struct record_metadata *mnode;
 693                 for (mnode = *wheretoput; mnode; mnode = mnode->next)
 694                     if (!strcmp((const char *) mnode->data.text, newm->data.text))
 695                         break;
 696                 if (!mnode)
 697                 {
 698                     newm->next = *wheretoput;
 699                     *wheretoput = newm;
 700                 }
 701             }
 702             else if (md->merge == Metadata_merge_longest)
 703             {
 704                 if (!*wheretoput ||
 705                         strlen(newm->data.text) > strlen((*wheretoput)->data.text))
 706                 {
 707                     *wheretoput = newm;
 708                     if (sk)
 709                     {
 710                         char *s = nmem_strdup(se->nmem, newm->data.text);
 711                         if (!cluster->sortkeys[md->sortkey_offset])
 712                             cluster->sortkeys[md->sortkey_offset] =
 713                                 nmem_malloc(se->nmem, sizeof(union data_types));
 714                         normalize_mergekey(s,
 715                                 (sk->type == Metadata_sortkey_skiparticle));
 716                         cluster->sortkeys[md->sortkey_offset]->text = s;
 717                     }
 718                 }
 719             }
 720             else if (md->merge == Metadata_merge_all || md->merge == Metadata_merge_no)
 721             {
 722                 newm->next = *wheretoput;
 723                 *wheretoput = newm;
 724             }
 725             else if (md->merge == Metadata_merge_range)
 726             {
 727                 assert(md->type == Metadata_type_year);
 728                 if (!*wheretoput)
 729                 {
 730                     *wheretoput = newm;
 731                     (*wheretoput)->data.number.min = first;
 732                     (*wheretoput)->data.number.max = last;
 733                     if (sk)
 734                         cluster->sortkeys[md->sortkey_offset] = &newm->data;
 735                 }
 736                 else
 737                 {
 738                     if (first < (*wheretoput)->data.number.min)
 739                         (*wheretoput)->data.number.min = first;
 740                     if (last > (*wheretoput)->data.number.max)
 741                         (*wheretoput)->data.number.max = last;
 742                 }
 743 #ifdef GAGA
 744                 if (sk)
 745                 {
 746                     union data_types *sdata = cluster->sortkeys[md->sortkey_offset];
 747                     yaz_log(YLOG_LOG, "SK range: %d-%d", sdata->number.min, sdata->number.max);
 748                 }
 749 #endif
 750             }
 751             else
 752                 yaz_log(YLOG_WARN, "Don't know how to merge on element name %s", md->name);
 753
 754             if (md->rank)
 755                 relevance_countwords(se->relevance, cluster,
 756                                      (char *) value, md->rank);
 757             if (md->termlist)
 758             {
 759                 if (md->type == Metadata_type_year)
 760                 {
 761                     char year[64];
 762                     sprintf(year, "%d", last);
 763                     add_facet(se, (char *) type, year);
 764                     if (first != last)
 765                     {
 766                         sprintf(year, "%d", first);
 767                         add_facet(se, (char *) type, year);
 768                     }
 769                 }
 770                 else
 771                     add_facet(se, (char *) type, (char *) value);
 772             }
 773             xmlFree(type);
 774             xmlFree(value);
 775             type = value = 0;
 776         }
 777         else
 778             yaz_log(YLOG_WARN, "Unexpected element %s in internal record", n->name);
 779     }
 780     if (type)
 781         xmlFree(type);
 782     if (value)
 783         xmlFree(value);
 784
 785     xmlFreeDoc(xdoc);
 786
 787     relevance_donerecord(se->relevance, cluster);
 788     se->total_records++;
 789
 790     return res;
 791 }
 792
 793 // Retrieve first defined value for 'name' for given database.
 794 // Will be extended to take into account user associated with session
 795 char *session_setting_oneval(struct session *s, struct database *db, int offset)
 796 {
 797     if (!db->settings[offset])
 798         return 0;
 799     return db->settings[offset]->value;
 800 }
 801
 802 static void ingest_records(struct client *cl, Z_Records *r)
 803 {
 804 #if USE_TIMING
 805     yaz_timing_t t = yaz_timing_create();
 806 #endif
 807     struct record *rec;
 808     struct session *s = cl->session;
 809     Z_NamePlusRecordList *rlist;
 810     int i;
 811
 812     if (r->which != Z_Records_DBOSD)
 813         return;
 814     rlist = r->u.databaseOrSurDiagnostics;
 815     for (i = 0; i < rlist->num_records; i++)
 816     {
 817         Z_NamePlusRecord *npr = rlist->records[i];
 818
 819         cl->records++;
 820         if (npr->which != Z_NamePlusRecord_databaseRecord)
 821         {
 822             yaz_log(YLOG_WARN,
 823                     "Unexpected record type, probably diagnostic %s",
 824                     cl->database->url);
 825             continue;
 826         }
 827
 828         rec = ingest_record(cl, npr->u.databaseRecord);
 829         if (!rec)
 830             continue;
 831     }
 832     if (s->watchlist[SESSION_WATCH_RECORDS].fun && rlist->num_records)
 833         session_alert_watch(s, SESSION_WATCH_RECORDS);
 834
 835 #if USE_TIMING
 836     yaz_timing_stop(t);
 837     yaz_log(YLOG_LOG, "ingest_records %6.5f %3.2f %3.2f",
 838             yaz_timing_get_real(t), yaz_timing_get_user(t),
 839             yaz_timing_get_sys(t));
 840     yaz_timing_destroy(&t);
 841 #endif
 842 }
 843
 844 static void do_presentResponse(IOCHAN i, Z_APDU *a)
 845 {
 846     struct connection *co = iochan_getdata(i);
 847     struct client *cl = co->client;
 848     Z_PresentResponse *r = a->u.presentResponse;
 849
 850     if (r->records) {
 851         Z_Records *recs = r->records;
 852         if (recs->which == Z_Records_NSD)
 853         {
 854             yaz_log(YLOG_WARN, "Non-surrogate diagnostic %s",
 855                     cl->database->url);
 856             cl->diagnostic = *recs->u.nonSurrogateDiagnostic->condition;
 857             cl->state = Client_Error;
 858         }
 859     }
 860
 861     if (!*r->presentStatus && cl->state != Client_Error)
 862     {
 863         yaz_log(YLOG_DEBUG, "Good Present response %s",
 864                 cl->database->url);
 865         ingest_records(cl, r->records);
 866         cl->state = Client_Idle;
 867     }
 868     else if (*r->presentStatus)
 869     {
 870         yaz_log(YLOG_WARN, "Bad Present response %s",
 871                 cl->database->url);
 872         cl->state = Client_Error;
 873     }
 874 }
 875
 876 static void handler(IOCHAN i, int event)
 877 {
 878     struct connection *co = iochan_getdata(i);
 879     struct client *cl = co->client;
 880     struct session *se = 0;
 881
 882     if (cl)
 883         se = cl->session;
 884     else
 885     {
 886         yaz_log(YLOG_WARN, "Destroying orphan connection");
 887         connection_destroy(co);
 888         return;
 889     }
 890
 891     if (co->state == Conn_Connecting && event & EVENT_OUTPUT)
 892     {
 893         int errcode;
 894         socklen_t errlen = sizeof(errcode);
 895
 896         if (getsockopt(cs_fileno(co->link), SOL_SOCKET, SO_ERROR, &errcode,
 897             &errlen) < 0 || errcode != 0)
 898         {
 899             client_fatal(cl);
 900             return;
 901         }
 902         else
 903         {
 904             yaz_log(YLOG_DEBUG, "Connect OK");
 905             co->state = Conn_Open;
 906             if (cl)
 907                 cl->state = Client_Connected;
 908         }
 909     }
 910
 911     else if (event & EVENT_INPUT)
 912     {
 913         int len = cs_get(co->link, &co->ibuf, &co->ibufsize);
 914
 915         if (len < 0)
 916         {
 917             yaz_log(YLOG_WARN|YLOG_ERRNO, "Error reading from %s",
 918                     cl->database->url);
 919             connection_destroy(co);
 920             return;
 921         }
 922         else if (len == 0)
 923         {
 924             yaz_log(YLOG_WARN, "EOF reading from %s", cl->database->url);
 925             connection_destroy(co);
 926             return;
 927         }
 928         else if (len > 1) // We discard input if we have no connection
 929         {
 930             co->state = Conn_Open;
 931
 932             if (cl && (cl->requestid == se->requestid || cl->state == Client_Initializing))
 933             {
 934                 Z_APDU *a;
 935
 936                 odr_reset(global_parameters.odr_in);
 937                 odr_setbuf(global_parameters.odr_in, co->ibuf, len, 0);
 938                 if (!z_APDU(global_parameters.odr_in, &a, 0, 0))
 939                 {
 940                     client_fatal(cl);
 941                     return;
 942                 }
 943                 switch (a->which)
 944                 {
 945                     case Z_APDU_initResponse:
 946                         do_initResponse(i, a);
 947                         break;
 948                     case Z_APDU_searchResponse:
 949                         do_searchResponse(i, a);
 950                         break;
 951                     case Z_APDU_presentResponse:
 952                         do_presentResponse(i, a);
 953                         break;
 954                     case Z_APDU_close:
 955                         do_closeResponse(i, a);
 956                         break;
 957                     default:
 958                         yaz_log(YLOG_WARN,
 959                                 "Unexpected Z39.50 response from %s",
 960                                 cl->database->url);
 961                         client_fatal(cl);
 962                         return;
 963                 }
 964                 // We aren't expecting staggered output from target
 965                 // if (cs_more(t->link))
 966                 //    iochan_setevent(i, EVENT_INPUT);
 967             }
 968             else  // we throw away response and go to idle mode
 969             {
 970                 yaz_log(YLOG_DEBUG, "Ignoring result of expired operation");
 971                 cl->state = Client_Idle;
 972             }
 973         }
 974         /* if len==1 we do nothing but wait for more input */
 975     }
 976
 977     if (cl->state == Client_Connected) {
 978         send_init(i);
 979     }
 980
 981     if (cl->state == Client_Idle)
 982     {
 983         if (cl->requestid != se->requestid && *se->query) {
 984             send_search(i);
 985         }
 986         else if (cl->hits > 0 && cl->records < global_parameters.toget &&
 987             cl->records < cl->hits) {
 988             send_present(i);
 989         }
 990     }
 991 }
 992
 993 // Disassociate connection from client
 994 static void connection_release(struct connection *co)
 995 {
 996     struct client *cl = co->client;
 997
 998     yaz_log(YLOG_DEBUG, "Connection release %s", co->host->hostport);
 999     if (!cl)
1000         return;
1001     cl->connection = 0;
1002     co->client = 0;
1003 }
1004
1005 // Close connection and recycle structure
1006 static void connection_destroy(struct connection *co)
1007 {
1008     struct host *h = co->host;
1009     cs_close(co->link);
1010     iochan_destroy(co->iochan);
1011
1012     yaz_log(YLOG_DEBUG, "Connection destroy %s", co->host->hostport);
1013     if (h->connections == co)
1014         h->connections = co->next;
1015     else
1016     {
1017         struct connection *pco;
1018         for (pco = h->connections; pco && pco->next != co; pco = pco->next)
1019             ;
1020         if (pco)
1021             pco->next = co->next;
1022         else
1023             abort();
1024     }
1025     if (co->client)
1026     {
1027         if (co->client->state != Client_Idle)
1028             co->client->state = Client_Disconnected;
1029         co->client->connection = 0;
1030     }
1031     co->next = connection_freelist;
1032     connection_freelist = co;
1033 }
1034
1035 // Creates a new connection for client, associated with the host of
1036 // client's database
1037 static struct connection *connection_create(struct client *cl)
1038 {
1039     struct connection *new;
1040     COMSTACK link;
1041     int res;
1042     void *addr;
1043
1044
1045     if (!(link = cs_create(tcpip_type, 0, PROTO_Z3950)))
1046         {
1047             yaz_log(YLOG_FATAL|YLOG_ERRNO, "Failed to create comstack");
1048             exit(1);
1049         }
1050
1051     if (0 == strlen(global_parameters.zproxy_override)){
1052         /* no Z39.50 proxy needed - direct connect */
1053         yaz_log(YLOG_DEBUG, "Connection create %s", cl->database->url);
1054
1055         if (!(addr = cs_straddr(link, cl->database->host->ipport)))
1056             {
1057                 yaz_log(YLOG_WARN|YLOG_ERRNO,
1058                         "Lookup of IP address %s failed",
1059                         cl->database->host->ipport);
1060                 return 0;
1061             }
1062
1063     } else {
1064         /* Z39.50 proxy connect */
1065         yaz_log(YLOG_DEBUG, "Connection create %s proxy %s",
1066                 cl->database->url, global_parameters.zproxy_override);
1067
1068         if (!(addr = cs_straddr(link, global_parameters.zproxy_override)))
1069             {
1070                 yaz_log(YLOG_WARN|YLOG_ERRNO,
1071                         "Lookup of IP address %s failed",
1072                         global_parameters.zproxy_override);
1073                 return 0;
1074             }
1075     }
1076
1077     res = cs_connect(link, addr);
1078     if (res < 0)
1079     {
1080         yaz_log(YLOG_WARN|YLOG_ERRNO, "cs_connect %s", cl->database->url);
1081         return 0;
1082     }
1083
1084     if ((new = connection_freelist))
1085         connection_freelist = new->next;
1086     else
1087     {
1088         new = xmalloc(sizeof (struct connection));
1089         new->ibuf = 0;
1090         new->ibufsize = 0;
1091     }
1092     new->state = Conn_Connecting;
1093     new->host = cl->database->host;
1094     new->next = new->host->connections;
1095     new->host->connections = new;
1096     new->client = cl;
1097     cl->connection = new;
1098     new->link = link;
1099
1100     new->iochan = iochan_create(cs_fileno(link), handler, 0);
1101     iochan_setdata(new->iochan, new);
1102     new->iochan->next = channel_list;
1103     channel_list = new->iochan;
1104     return new;
1105 }
1106
1107 // Close connection and set state to error
1108 static void client_fatal(struct client *cl)
1109 {
1110     yaz_log(YLOG_WARN, "Fatal error from %s", cl->database->url);
1111     connection_destroy(cl->connection);
1112     cl->state = Client_Error;
1113 }
1114
1115 // Ensure that client has a connection associated
1116 static int client_prep_connection(struct client *cl)
1117 {
1118     struct connection *co;
1119     struct session *se = cl->session;
1120     struct host *host = cl->database->host;
1121
1122     co = cl->connection;
1123
1124     yaz_log(YLOG_DEBUG, "Client prep %s", cl->database->url);
1125
1126     if (!co)
1127     {
1128         // See if someone else has an idle connection
1129         // We should look at timestamps here to select the longest-idle connection
1130         for (co = host->connections; co; co = co->next)
1131             if (co->state == Conn_Open && (!co->client || co->client->session != se))
1132                 break;
1133         if (co)
1134         {
1135             connection_release(co);
1136             cl->connection = co;
1137             co->client = cl;
1138         }
1139         else
1140             co = connection_create(cl);
1141     }
1142     if (co)
1143     {
1144         if (co->state == Conn_Connecting)
1145         {
1146             cl->state = Client_Connecting;
1147             iochan_setflag(co->iochan, EVENT_OUTPUT);
1148         }
1149         else if (co->state == Conn_Open)
1150         {
1151             if (cl->state == Client_Error || cl->state == Client_Disconnected)
1152                 cl->state = Client_Idle;
1153             iochan_setflag(co->iochan, EVENT_OUTPUT);
1154         }
1155         return 1;
1156     }
1157     else
1158         return 0;
1159 }
1160
1161 static struct client *client_create(void)
1162 {
1163     struct client *r;
1164     if (client_freelist)
1165     {
1166         r = client_freelist;
1167         client_freelist = client_freelist->next;
1168     }
1169     else
1170         r = xmalloc(sizeof(struct client));
1171     r->database = 0;
1172     r->connection = 0;
1173     r->session = 0;
1174     r->hits = 0;
1175     r->records = 0;
1176     r->setno = 0;
1177     r->requestid = -1;
1178     r->diagnostic = 0;
1179     r->state = Client_Disconnected;
1180     r->next = 0;
1181     return r;
1182 }
1183
1184 void client_destroy(struct client *c)
1185 {
1186     struct session *se = c->session;
1187     if (c == se->clients)
1188         se->clients = c->next;
1189     else
1190     {
1191         struct client *cc;
1192         for (cc = se->clients; cc && cc->next != c; cc = cc->next)
1193             ;
1194         if (cc)
1195             cc->next = c->next;
1196     }
1197     if (c->connection)
1198         connection_release(c->connection);
1199     c->next = client_freelist;
1200     client_freelist = c;
1201 }
1202
1203 void session_set_watch(struct session *s, int what, session_watchfun fun, void *data)
1204 {
1205     s->watchlist[what].fun = fun;
1206     s->watchlist[what].data = data;
1207 }
1208
1209 void session_alert_watch(struct session *s, int what)
1210 {
1211     if (!s->watchlist[what].fun)
1212         return;
1213     (*s->watchlist[what].fun)(s->watchlist[what].data);
1214     s->watchlist[what].fun = 0;
1215     s->watchlist[what].data = 0;
1216 }
1217
1218 //callback for grep_databases
1219 static void select_targets_callback(void *context, struct database *db)
1220 {
1221     struct session *se = (struct session*) context;
1222     struct client *cl = client_create();
1223     cl->database = db;
1224     cl->session = se;
1225     cl->next = se->clients;
1226     se->clients = cl;
1227 }
1228
1229 // Associates a set of clients with a session;
1230 int select_targets(struct session *se, struct database_criterion *crit)
1231 {
1232     while (se->clients)
1233         client_destroy(se->clients);
1234
1235     return grep_databases(se, crit, select_targets_callback);
1236 }
1237
1238 int session_active_clients(struct session *s)
1239 {
1240     struct client *c;
1241     int res = 0;
1242
1243     for (c = s->clients; c; c = c->next)
1244         if (c->connection && (c->state == Client_Connecting ||
1245                     c->state == Client_Initializing ||
1246                     c->state == Client_Searching ||
1247                     c->state == Client_Presenting))
1248             res++;
1249
1250     return res;
1251 }
1252
1253 // parses crit1=val1,crit2=val2|val3,...
1254 static struct database_criterion *parse_filter(NMEM m, const char *buf)
1255 {
1256     struct database_criterion *res = 0;
1257     char **values;
1258     int num;
1259     int i;
1260
1261     if (!buf || !*buf)
1262         return 0;
1263     nmem_strsplit(m, ",", buf,  &values, &num);
1264     for (i = 0; i < num; i++)
1265     {
1266         char **subvalues;
1267         int subnum;
1268         int subi;
1269         struct database_criterion *new = nmem_malloc(m, sizeof(*new));
1270         char *eq = strchr(values[i], '=');
1271         if (!eq)
1272         {
1273             yaz_log(YLOG_WARN, "Missing equal-sign in filter");
1274             return 0;
1275         }
1276         *(eq++) = '\0';
1277         new->name = values[i];
1278         nmem_strsplit(m, "|", eq, &subvalues, &subnum);
1279         new->values = 0;
1280         for (subi = 0; subi < subnum; subi++)
1281         {
1282             struct database_criterion_value *newv = nmem_malloc(m, sizeof(*newv));
1283             newv->value = subvalues[subi];
1284             newv->next = new->values;
1285             new->values = newv;
1286         }
1287         new->next = res;
1288         res = new;
1289     }
1290     return res;
1291 }
1292
1293 char *search(struct session *se, char *query, char *filter)
1294 {
1295     int live_channels = 0;
1296     struct client *cl;
1297     struct database_criterion *criteria;
1298
1299     yaz_log(YLOG_DEBUG, "Search");
1300
1301     nmem_reset(se->nmem);
1302     criteria = parse_filter(se->nmem, filter);
1303     strcpy(se->query, query);
1304     se->requestid++;
1305     select_targets(se, criteria);
1306     for (cl = se->clients; cl; cl = cl->next)
1307     {
1308         if (client_prep_connection(cl))
1309             live_channels++;
1310     }
1311     if (live_channels)
1312     {
1313         int maxrecs = live_channels * global_parameters.toget;
1314         se->num_termlists = 0;
1315         se->reclist = reclist_create(se->nmem, maxrecs);
1316         // This will be initialized in send_search()
1317         se->relevance = 0;
1318         se->total_records = se->total_hits = se->total_merged = 0;
1319         se->expected_maxrecs = maxrecs;
1320     }
1321     else
1322         return "NOTARGETS";
1323
1324     return 0;
1325 }
1326
1327 void destroy_session(struct session *s)
1328 {
1329     yaz_log(YLOG_LOG, "Destroying session");
1330     while (s->clients)
1331         client_destroy(s->clients);
1332     nmem_destroy(s->nmem);
1333     wrbuf_destroy(s->wrbuf);
1334 }
1335
1336 struct session *new_session(NMEM nmem)
1337 {
1338     int i;
1339     struct session *session = nmem_malloc(nmem, sizeof(*session));
1340
1341     yaz_log(YLOG_DEBUG, "New Pazpar2 session");
1342
1343     session->total_hits = 0;
1344     session->total_records = 0;
1345     session->num_termlists = 0;
1346     session->reclist = 0;
1347     session->requestid = -1;
1348     session->clients = 0;
1349     session->expected_maxrecs = 0;
1350     session->query[0] = '\0';
1351     session->session_nmem = nmem;
1352     session->nmem = nmem_create();
1353     session->wrbuf = wrbuf_alloc();
1354     for (i = 0; i <= SESSION_WATCH_MAX; i++)
1355     {
1356         session->watchlist[i].data = 0;
1357         session->watchlist[i].fun = 0;
1358     }
1359
1360     return session;
1361 }
1362
1363 struct hitsbytarget *hitsbytarget(struct session *se, int *count)
1364 {
1365     static struct hitsbytarget res[1000]; // FIXME MM
1366     struct client *cl;
1367
1368     *count = 0;
1369     for (cl = se->clients; cl; cl = cl->next)
1370     {
1371         res[*count].id = cl->database->url;
1372         res[*count].name = cl->database->name;
1373         res[*count].hits = cl->hits;
1374         res[*count].records = cl->records;
1375         res[*count].diagnostic = cl->diagnostic;
1376         res[*count].state = client_states[cl->state];
1377         res[*count].connected  = cl->connection ? 1 : 0;
1378         (*count)++;
1379     }
1380
1381     return res;
1382 }
1383
1384 struct termlist_score **termlist(struct session *s, const char *name, int *num)
1385 {
1386     int i;
1387
1388     for (i = 0; i < s->num_termlists; i++)
1389         if (!strcmp((const char *) s->termlists[i].name, name))
1390             return termlist_highscore(s->termlists[i].termlist, num);
1391     return 0;
1392 }
1393
1394 #ifdef MISSING_HEADERS
1395 void report_nmem_stats(void)
1396 {
1397     size_t in_use, is_free;
1398
1399     nmem_get_memory_in_use(&in_use);
1400     nmem_get_memory_free(&is_free);
1401
1402     yaz_log(YLOG_LOG, "nmem stat: use=%ld free=%ld",
1403             (long) in_use, (long) is_free);
1404 }
1405 #endif
1406
1407 struct record_cluster *show_single(struct session *s, int id)
1408 {
1409     struct record_cluster *r;
1410
1411     reclist_rewind(s->reclist);
1412     while ((r = reclist_read_record(s->reclist)))
1413         if (r->recid == id)
1414             return r;
1415     return 0;
1416 }
1417
1418 struct record_cluster **show(struct session *s, struct reclist_sortparms *sp, int start,
1419         int *num, int *total, int *sumhits, NMEM nmem_show)
1420 {
1421     struct record_cluster **recs = nmem_malloc(nmem_show, *num
1422                                        * sizeof(struct record_cluster *));
1423     struct reclist_sortparms *spp;
1424     int i;
1425 #if USE_TIMING
1426     yaz_timing_t t = yaz_timing_create();
1427 #endif
1428
1429     for (spp = sp; spp; spp = spp->next)
1430         if (spp->type == Metadata_sortkey_relevance)
1431         {
1432             relevance_prepare_read(s->relevance, s->reclist);
1433             break;
1434         }
1435     reclist_sort(s->reclist, sp);
1436
1437     *total = s->reclist->num_records;
1438     *sumhits = s->total_hits;
1439
1440     for (i = 0; i < start; i++)
1441         if (!reclist_read_record(s->reclist))
1442         {
1443             *num = 0;
1444             recs = 0;
1445             break;
1446         }
1447
1448     for (i = 0; i < *num; i++)
1449     {
1450         struct record_cluster *r = reclist_read_record(s->reclist);
1451         if (!r)
1452         {
1453             *num = i;
1454             break;
1455         }
1456         recs[i] = r;
1457     }
1458 #if USE_TIMING
1459     yaz_timing_stop(t);
1460     yaz_log(YLOG_LOG, "show %6.5f %3.2f %3.2f",
1461             yaz_timing_get_real(t), yaz_timing_get_user(t),
1462             yaz_timing_get_sys(t));
1463     yaz_timing_destroy(&t);
1464 #endif
1465     return recs;
1466 }
1467
1468 void statistics(struct session *se, struct statistics *stat)
1469 {
1470     struct client *cl;
1471     int count = 0;
1472
1473     memset(stat, 0, sizeof(*stat));
1474     for (cl = se->clients; cl; cl = cl->next)
1475     {
1476         if (!cl->connection)
1477             stat->num_no_connection++;
1478         switch (cl->state)
1479         {
1480             case Client_Connecting: stat->num_connecting++; break;
1481             case Client_Initializing: stat->num_initializing++; break;
1482             case Client_Searching: stat->num_searching++; break;
1483             case Client_Presenting: stat->num_presenting++; break;
1484             case Client_Idle: stat->num_idle++; break;
1485             case Client_Failed: stat->num_failed++; break;
1486             case Client_Error: stat->num_error++; break;
1487             default: break;
1488         }
1489         count++;
1490     }
1491     stat->num_hits = se->total_hits;
1492     stat->num_records = se->total_records;
1493
1494     stat->num_clients = count;
1495 }
1496
1497 static void start_http_listener(void)
1498 {
1499     char hp[128] = "";
1500     struct conf_server *ser = global_parameters.server;
1501
1502     if (*global_parameters.listener_override)
1503         strcpy(hp, global_parameters.listener_override);
1504     else
1505     {
1506         strcpy(hp, ser->host ? ser->host : "");
1507         if (ser->port)
1508         {
1509             if (*hp)
1510                 strcat(hp, ":");
1511             sprintf(hp + strlen(hp), "%d", ser->port);
1512         }
1513     }
1514     http_init(hp);
1515 }
1516
1517 static void start_proxy(void)
1518 {
1519     char hp[128] = "";
1520     struct conf_server *ser = global_parameters.server;
1521
1522     if (*global_parameters.proxy_override)
1523         strcpy(hp, global_parameters.proxy_override);
1524     else if (ser->proxy_host || ser->proxy_port)
1525     {
1526         strcpy(hp, ser->proxy_host ? ser->proxy_host : "");
1527         if (ser->proxy_port)
1528         {
1529             if (*hp)
1530                 strcat(hp, ":");
1531             sprintf(hp + strlen(hp), "%d", ser->proxy_port);
1532         }
1533     }
1534     else
1535         return;
1536
1537     http_set_proxyaddr(hp, ser->myurl ? ser->myurl : "");
1538 }
1539
1540 static void start_zproxy(void)
1541 {
1542     struct conf_server *ser = global_parameters.server;
1543
1544     if (*global_parameters.zproxy_override){
1545         yaz_log(YLOG_LOG, "Z39.50 proxy  %s",
1546                 global_parameters.zproxy_override);
1547         return;
1548     }
1549
1550     else if (ser->zproxy_host || ser->zproxy_port)
1551     {
1552         char hp[128] = "";
1553
1554         strcpy(hp, ser->zproxy_host ? ser->zproxy_host : "");
1555         if (ser->zproxy_port)
1556         {
1557             if (*hp)
1558                 strcat(hp, ":");
1559             else
1560                 strcat(hp, "@:");
1561
1562             sprintf(hp + strlen(hp), "%d", ser->zproxy_port);
1563         }
1564         strcpy(global_parameters.zproxy_override, hp);
1565         yaz_log(YLOG_LOG, "Z39.50 proxy  %s",
1566                 global_parameters.zproxy_override);
1567
1568     }
1569     else
1570         return;
1571 }
1572
1573
1574
1575 int main(int argc, char **argv)
1576 {
1577     int ret;
1578     char *arg;
1579
1580     if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
1581         yaz_log(YLOG_WARN|YLOG_ERRNO, "signal");
1582
1583     yaz_log_init(YLOG_DEFAULT_LEVEL, "pazpar2", 0);
1584
1585     while ((ret = options("t:f:x:h:p:z:s:d", argv, argc, &arg)) != -2)
1586     {
1587         switch (ret) {
1588             case 'f':
1589                 if (!read_config(arg))
1590                     exit(1);
1591                 break;
1592             case 'h':
1593                 strcpy(global_parameters.listener_override, arg);
1594                 break;
1595             case 'p':
1596                 strcpy(global_parameters.proxy_override, arg);
1597                 break;
1598             case 'z':
1599                 strcpy(global_parameters.zproxy_override, arg);
1600                 break;
1601             case 't':
1602                 strcpy(global_parameters.settings_path_override, arg);
1603                 break;
1604             case 's':
1605                 load_simpletargets(arg);
1606                 break;
1607             case 'd':
1608                 global_parameters.dump_records = 1;
1609                 break;
1610             default:
1611                 fprintf(stderr, "Usage: pazpar2\n"
1612                         "    -f configfile\n"
1613                         "    -h [host:]port          (REST protocol listener)\n"
1614                         "    -C cclconfig\n"
1615                         "    -s simpletargetfile\n"
1616                         "    -p hostname[:portno]    (HTTP proxy)\n"
1617                         "    -z hostname[:portno]    (Z39.50 proxy)\n"
1618                         "    -d                      (show internal records)\n");
1619                 exit(1);
1620         }
1621     }
1622
1623     if (!config)
1624     {
1625         yaz_log(YLOG_FATAL, "Load config with -f");
1626         exit(1);
1627     }
1628     global_parameters.server = config->servers;
1629
1630     start_http_listener();
1631     start_proxy();
1632     start_zproxy();
1633
1634     if (*global_parameters.settings_path_override)
1635         settings_read(global_parameters.settings_path_override);
1636     else if (global_parameters.server->settings)
1637         settings_read(global_parameters.server->settings);
1638     else
1639         yaz_log(YLOG_WARN, "No settings-directory specified. Problems may well ensue!");
1640     prepare_databases();
1641     global_parameters.odr_in = odr_createmem(ODR_DECODE);
1642     global_parameters.odr_out = odr_createmem(ODR_ENCODE);
1643
1644     event_loop(&channel_list);
1645
1646     return 0;
1647 }
1648
1649 /*
1650  * Local variables:
1651  * c-basic-offset: 4
1652  * indent-tabs-mode: nil
1653  * End:
1654  * vim: shiftwidth=4 tabstop=8 expandtab
1655  */