src/pazpar2.c

   1 /* $Id: pazpar2.c,v 1.76 2007-04-12 12:05:22 marc 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 #include <yaz/querytowrbuf.h>
  43
  44 #if HAVE_CONFIG_H
  45 #include "cconfig.h"
  46 #endif
  47
  48 #define USE_TIMING 0
  49 #if USE_TIMING
  50 #include <yaz/timing.h>
  51 #endif
  52
  53 #include <netinet/in.h>
  54
  55 #include "pazpar2.h"
  56 #include "eventl.h"
  57 #include "http.h"
  58 #include "termlists.h"
  59 #include "reclists.h"
  60 #include "relevance.h"
  61 #include "config.h"
  62 #include "database.h"
  63 #include "settings.h"
  64
  65 #define MAX_CHUNK 15
  66
  67 static void client_fatal(struct client *cl);
  68 static void connection_destroy(struct connection *co);
  69 static int client_prep_connection(struct client *cl);
  70 static void ingest_records(struct client *cl, Z_Records *r);
  71 void session_alert_watch(struct session *s, int what);
  72
  73 IOCHAN channel_list = 0;  // Master list of connections we're handling events to
  74
  75 static struct connection *connection_freelist = 0;
  76 static struct client *client_freelist = 0;
  77
  78 static char *client_states[] = {
  79     "Client_Connecting",
  80     "Client_Connected",
  81     "Client_Idle",
  82     "Client_Initializing",
  83     "Client_Searching",
  84     "Client_Presenting",
  85     "Client_Error",
  86     "Client_Failed",
  87     "Client_Disconnected",
  88     "Client_Stopped"
  89 };
  90
  91 // Note: Some things in this structure will eventually move to configuration
  92 struct parameters global_parameters =
  93 {
  94     "",
  95     "",
  96     "",
  97     "",
  98     0,
  99     0,
 100     30,
 101     "81",
 102     "Index Data PazPar2 (MasterKey)",
 103     VERSION,
 104     600, // 10 minutes
 105     60,
 106     100,
 107     MAX_CHUNK,
 108     0,
 109     0
 110 };
 111
 112 static int send_apdu(struct client *c, Z_APDU *a)
 113 {
 114     struct connection *co = c->connection;
 115     char *buf;
 116     int len, r;
 117
 118     if (!z_APDU(global_parameters.odr_out, &a, 0, 0))
 119     {
 120         odr_perror(global_parameters.odr_out, "Encoding APDU");
 121         abort();
 122     }
 123     buf = odr_getbuf(global_parameters.odr_out, &len, 0);
 124     r = cs_put(co->link, buf, len);
 125     if (r < 0)
 126     {
 127         yaz_log(YLOG_WARN, "cs_put: %s", cs_errmsg(cs_errno(co->link)));
 128         return -1;
 129     }
 130     else if (r == 1)
 131     {
 132         fprintf(stderr, "cs_put incomplete (ParaZ does not handle that)\n");
 133         exit(1);
 134     }
 135     odr_reset(global_parameters.odr_out); /* release the APDU structure  */
 136     co->state = Conn_Waiting;
 137     return 0;
 138 }
 139
 140 // Set authentication token in init if one is set for the client
 141 // TODO: Extend this to handle other schemes than open (should be simple)
 142 static void init_authentication(struct client *cl, Z_InitRequest *req)
 143 {
 144     struct session_database *sdb = cl->database;
 145     char *auth = session_setting_oneval(sdb, PZ_AUTHENTICATION);
 146
 147     if (auth)
 148     {
 149         Z_IdAuthentication *idAuth = odr_malloc(global_parameters.odr_out,
 150                 sizeof(*idAuth));
 151         idAuth->which = Z_IdAuthentication_open;
 152         idAuth->u.open = auth;
 153         req->idAuthentication = idAuth;
 154     }
 155 }
 156
 157 static void send_init(IOCHAN i)
 158 {
 159
 160     struct connection *co = iochan_getdata(i);
 161     struct client *cl = co->client;
 162     Z_APDU *a = zget_APDU(global_parameters.odr_out, Z_APDU_initRequest);
 163
 164     a->u.initRequest->implementationId = global_parameters.implementationId;
 165     a->u.initRequest->implementationName = global_parameters.implementationName;
 166     a->u.initRequest->implementationVersion =
 167         global_parameters.implementationVersion;
 168     ODR_MASK_SET(a->u.initRequest->options, Z_Options_search);
 169     ODR_MASK_SET(a->u.initRequest->options, Z_Options_present);
 170     ODR_MASK_SET(a->u.initRequest->options, Z_Options_namedResultSets);
 171
 172     ODR_MASK_SET(a->u.initRequest->protocolVersion, Z_ProtocolVersion_1);
 173     ODR_MASK_SET(a->u.initRequest->protocolVersion, Z_ProtocolVersion_2);
 174     ODR_MASK_SET(a->u.initRequest->protocolVersion, Z_ProtocolVersion_3);
 175
 176     init_authentication(cl, a->u.initRequest);
 177
 178     /* add virtual host if tunneling through Z39.50 proxy */
 179
 180     if (0 < strlen(global_parameters.zproxy_override)
 181         && 0 < strlen(cl->database->database->url))
 182         yaz_oi_set_string_oidval(&a->u.initRequest->otherInfo,
 183                                  global_parameters.odr_out, VAL_PROXY,
 184                                  1, cl->database->database->url);
 185
 186     if (send_apdu(cl, a) >= 0)
 187     {
 188         iochan_setflags(i, EVENT_INPUT);
 189         cl->state = Client_Initializing;
 190     }
 191     else
 192         cl->state = Client_Error;
 193     odr_reset(global_parameters.odr_out);
 194 }
 195
 196 static void pull_terms(NMEM nmem, struct ccl_rpn_node *n, char **termlist, int *num)
 197 {
 198     switch (n->kind)
 199     {
 200         case CCL_RPN_AND:
 201         case CCL_RPN_OR:
 202         case CCL_RPN_NOT:
 203         case CCL_RPN_PROX:
 204             pull_terms(nmem, n->u.p[0], termlist, num);
 205             pull_terms(nmem, n->u.p[1], termlist, num);
 206             break;
 207         case CCL_RPN_TERM:
 208             termlist[(*num)++] = nmem_strdup(nmem, n->u.t.term);
 209             break;
 210         default: // NOOP
 211             break;
 212     }
 213 }
 214
 215 // Extract terms from query into null-terminated termlist
 216 static void extract_terms(NMEM nmem, struct ccl_rpn_node *query, char **termlist)
 217 {
 218     int num = 0;
 219
 220     pull_terms(nmem, query, termlist, &num);
 221     termlist[num] = 0;
 222 }
 223
 224 static void send_search(IOCHAN i)
 225 {
 226     struct connection *co = iochan_getdata(i);
 227     struct client *cl = co->client;
 228     struct session *se = cl->session;
 229     struct session_database *sdb = cl->database;
 230     Z_APDU *a = zget_APDU(global_parameters.odr_out, Z_APDU_searchRequest);
 231     int ndb, cerror, cpos;
 232     char **databaselist;
 233     Z_Query *zquery;
 234     struct ccl_rpn_node *cn;
 235     int ssub = 0, lslb = 100000, mspn = 10;
 236     char *recsyn;
 237     char *piggyback;
 238
 239     yaz_log(YLOG_DEBUG, "Sending search to %s", cl->database->database->url);
 240
 241     cn = ccl_find_str(sdb->database->ccl_map, se->query, &cerror, &cpos);
 242     if (!cn)
 243         return;
 244
 245     if (!se->relevance)
 246     {
 247         // Initialize relevance structure with query terms
 248         char *p[512];
 249         extract_terms(se->nmem, cn, p);
 250         se->relevance = relevance_create(se->nmem, (const char **) p,
 251                 se->expected_maxrecs);
 252     }
 253
 254     a->u.searchRequest->query = zquery = odr_malloc(global_parameters.odr_out,
 255             sizeof(Z_Query));
 256     zquery->which = Z_Query_type_1;
 257     zquery->u.type_1 = ccl_rpn_query(global_parameters.odr_out, cn);
 258     ccl_rpn_delete(cn);
 259
 260     for (ndb = 0; sdb->database->databases[ndb]; ndb++)
 261         ;
 262     databaselist = odr_malloc(global_parameters.odr_out, sizeof(char*) * ndb);
 263     for (ndb = 0; sdb->database->databases[ndb]; ndb++)
 264         databaselist[ndb] = sdb->database->databases[ndb];
 265
 266     if (!(piggyback = session_setting_oneval(sdb, PZ_PIGGYBACK)) || *piggyback == '1')
 267     {
 268         if ((recsyn = session_setting_oneval(sdb, PZ_REQUESTSYNTAX)))
 269             a->u.searchRequest->preferredRecordSyntax =
 270                     yaz_str_to_z3950oid(global_parameters.odr_out,
 271                     CLASS_RECSYN, recsyn);
 272         a->u.searchRequest->smallSetUpperBound = &ssub;
 273         a->u.searchRequest->largeSetLowerBound = &lslb;
 274         a->u.searchRequest->mediumSetPresentNumber = &mspn;
 275     }
 276     a->u.searchRequest->resultSetName = "Default";
 277     a->u.searchRequest->databaseNames = databaselist;
 278     a->u.searchRequest->num_databaseNames = ndb;
 279
 280
 281     {  //scope for sending and logging queries
 282         WRBUF wbquery = wrbuf_alloc();
 283         yaz_query_to_wrbuf(wbquery, zquery);
 284
 285         if (send_apdu(cl, a) >= 0)
 286             {
 287                 iochan_setflags(i, EVENT_INPUT);
 288                 cl->state = Client_Searching;
 289                 cl->requestid = se->requestid;
 290                 yaz_log(YLOG_LOG, "SearchRequest %s  %s",
 291                          cl->database->database->url, wrbuf_cstr(wbquery));
 292             }
 293         else {
 294             cl->state = Client_Error;
 295                 yaz_log(YLOG_WARN, "Failed SearchRequest %s  %s",
 296                          cl->database->database->url, wrbuf_cstr(wbquery));
 297         }
 298
 299         wrbuf_destroy(wbquery);
 300     }
 301
 302     odr_reset(global_parameters.odr_out);
 303 }
 304
 305 static void send_present(IOCHAN i)
 306 {
 307     struct connection *co = iochan_getdata(i);
 308     struct client *cl = co->client;
 309     struct session_database *sdb = cl->database;
 310     Z_APDU *a = zget_APDU(global_parameters.odr_out, Z_APDU_presentRequest);
 311     int toget;
 312     int start = cl->records + 1;
 313     char *recsyn;
 314
 315     toget = global_parameters.chunk;
 316     if (toget > global_parameters.toget - cl->records)
 317         toget = global_parameters.toget - cl->records;
 318     if (toget > cl->hits - cl->records)
 319         toget = cl->hits - cl->records;
 320
 321     yaz_log(YLOG_DEBUG, "Trying to present %d records\n", toget);
 322
 323     a->u.presentRequest->resultSetStartPoint = &start;
 324     a->u.presentRequest->numberOfRecordsRequested = &toget;
 325
 326     a->u.presentRequest->resultSetId = "Default";
 327
 328     if ((recsyn = session_setting_oneval(sdb, PZ_REQUESTSYNTAX)))
 329         a->u.presentRequest->preferredRecordSyntax =
 330                 yaz_str_to_z3950oid(global_parameters.odr_out,
 331                 CLASS_RECSYN, recsyn);
 332
 333     if (send_apdu(cl, a) >= 0)
 334     {
 335         iochan_setflags(i, EVENT_INPUT);
 336         cl->state = Client_Presenting;
 337     }
 338     else
 339         cl->state = Client_Error;
 340     odr_reset(global_parameters.odr_out);
 341 }
 342
 343 static void do_initResponse(IOCHAN i, Z_APDU *a)
 344 {
 345     struct connection *co = iochan_getdata(i);
 346     struct client *cl = co->client;
 347     Z_InitResponse *r = a->u.initResponse;
 348
 349     yaz_log(YLOG_DEBUG, "Init response %s", cl->database->database->url);
 350
 351     if (*r->result)
 352     {
 353         cl->state = Client_Idle;
 354     }
 355     else
 356         cl->state = Client_Failed; // FIXME need to do something to the connection
 357 }
 358
 359 static void do_searchResponse(IOCHAN i, Z_APDU *a)
 360 {
 361     struct connection *co = iochan_getdata(i);
 362     struct client *cl = co->client;
 363     struct session *se = cl->session;
 364     Z_SearchResponse *r = a->u.searchResponse;
 365
 366     yaz_log(YLOG_DEBUG, "Search response %s (status=%d)",
 367             cl->database->database->url, *r->searchStatus);
 368
 369     if (*r->searchStatus)
 370     {
 371         cl->hits = *r->resultCount;
 372         se->total_hits += cl->hits;
 373         if (r->presentStatus && !*r->presentStatus && r->records)
 374         {
 375             yaz_log(YLOG_DEBUG, "Records in search response %s",
 376                     cl->database->database->url);
 377             ingest_records(cl, r->records);
 378         }
 379         cl->state = Client_Idle;
 380     }
 381     else
 382     {          /*"FAILED"*/
 383         cl->hits = 0;
 384         cl->state = Client_Error;
 385         if (r->records) {
 386             Z_Records *recs = r->records;
 387             if (recs->which == Z_Records_NSD)
 388             {
 389                 yaz_log(YLOG_WARN,
 390                         "Search response: Non-surrogate diagnostic %s",
 391                         cl->database->database->url);
 392                 cl->diagnostic = *recs->u.nonSurrogateDiagnostic->condition;
 393                 cl->state = Client_Error;
 394             }
 395         }
 396     }
 397 }
 398
 399 static void do_closeResponse(IOCHAN i, Z_APDU *a)
 400 {
 401     struct connection *co = iochan_getdata(i);
 402     struct client *cl = co->client;
 403     /* Z_Close *r = a->u.close; */
 404
 405     yaz_log(YLOG_WARN, "Close response %s", cl->database->database->url);
 406
 407     cl->state = Client_Failed;
 408     connection_destroy(co);
 409 }
 410
 411
 412 char *normalize_mergekey(char *buf, int skiparticle)
 413 {
 414     char *p = buf, *pout = buf;
 415
 416     if (skiparticle)
 417     {
 418         char firstword[64];
 419         char articles[] = "the den der die des an a "; // must end in space
 420
 421         while (*p && !isalnum(*p))
 422             p++;
 423         pout = firstword;
 424         while (*p && *p != ' ' && pout - firstword < 62)
 425             *(pout++) = tolower(*(p++));
 426         *(pout++) = ' ';
 427         *(pout++) = '\0';
 428         if (!strstr(articles, firstword))
 429             p = buf;
 430         pout = buf;
 431     }
 432
 433     while (*p)
 434     {
 435         while (*p && !isalnum(*p))
 436             p++;
 437         while (isalnum(*p))
 438             *(pout++) = tolower(*(p++));
 439         if (*p)
 440             *(pout++) = ' ';
 441         while (*p && !isalnum(*p))
 442             p++;
 443     }
 444     if (buf != pout)
 445         do {
 446             *(pout--) = '\0';
 447         }
 448         while (pout > buf && *pout == ' ');
 449
 450     return buf;
 451 }
 452
 453 static void add_facet(struct session *s, const char *type, const char *value)
 454 {
 455     int i;
 456
 457     if (!*value)
 458         return;
 459     for (i = 0; i < s->num_termlists; i++)
 460         if (!strcmp(s->termlists[i].name, type))
 461             break;
 462     if (i == s->num_termlists)
 463     {
 464         if (i == SESSION_MAX_TERMLISTS)
 465         {
 466             yaz_log(YLOG_FATAL, "Too many termlists");
 467             exit(1);
 468         }
 469         s->termlists[i].name = nmem_strdup(s->nmem, type);
 470         s->termlists[i].termlist = termlist_create(s->nmem, s->expected_maxrecs, 15);
 471         s->num_termlists = i + 1;
 472     }
 473     termlist_insert(s->termlists[i].termlist, value);
 474 }
 475
 476 static xmlDoc *normalize_record(struct client *cl, Z_External *rec)
 477 {
 478     struct database_retrievalmap *m;
 479     struct database *db = cl->database->database;
 480     xmlNode *res;
 481     xmlDoc *rdoc;
 482
 483     // First normalize to XML
 484     if (db->yaz_marc)
 485     {
 486         char *buf;
 487         int len;
 488         if (rec->which != Z_External_octet)
 489         {
 490             yaz_log(YLOG_WARN, "Unexpected external branch, probably BER %s",
 491                     cl->database->database->url);
 492             return 0;
 493         }
 494         buf = (char*) rec->u.octet_aligned->buf;
 495         len = rec->u.octet_aligned->len;
 496         if (yaz_marc_read_iso2709(db->yaz_marc, buf, len) < 0)
 497         {
 498             yaz_log(YLOG_WARN, "Failed to decode MARC %s",
 499                     cl->database->database->url);
 500             return 0;
 501         }
 502
 503         yaz_marc_write_using_libxml2(db->yaz_marc, 1);
 504         if (yaz_marc_write_xml(db->yaz_marc, &res,
 505                     "http://www.loc.gov/MARC21/slim", 0, 0) < 0)
 506         {
 507             yaz_log(YLOG_WARN, "Failed to encode as XML %s",
 508                     cl->database->database->url);
 509             return 0;
 510         }
 511         rdoc = xmlNewDoc((xmlChar *) "1.0");
 512         xmlDocSetRootElement(rdoc, res);
 513
 514     }
 515     else
 516     {
 517         yaz_log(YLOG_FATAL,
 518                 "Unknown native_syntax in normalize_record from %s",
 519                 cl->database->database->url);
 520         exit(1);
 521     }
 522
 523     if (global_parameters.dump_records){
 524         fprintf(stderr,
 525                 "Input Record (normalized) from %s\n----------------\n",
 526                 cl->database->database->url);
 527 #if LIBXML_VERSION >= 20600
 528         xmlDocFormatDump(stderr, rdoc, 1);
 529 #else
 530         xmlDocDump(stderr, rdoc);
 531 #endif
 532     }
 533
 534     for (m = db->map; m; m = m->next){
 535         xmlDoc *new = 0;
 536
 537 #if 1
 538         {
 539             xmlNodePtr root = 0;
 540             new = xsltApplyStylesheet(m->stylesheet, rdoc, 0);
 541             root= xmlDocGetRootElement(new);
 542         if (!new || !root || !(root->children))
 543         {
 544             yaz_log(YLOG_WARN, "XSLT transformation failed from %s",
 545                     cl->database->database->url);
 546             xmlFreeDoc(new);
 547             xmlFreeDoc(rdoc);
 548             return 0;
 549         }
 550         }
 551 #endif
 552
 553 #if 0
 554         // do it another way to detect transformation errors right now
 555         // but does not seem to work either!
 556         {
 557             xsltTransformContextPtr ctxt;
 558             ctxt = xsltNewTransformContext(m->stylesheet, rdoc);
 559             new = xsltApplyStylesheetUser(m->stylesheet, rdoc, 0, 0, 0, ctxt);
 560             if ((ctxt->state == XSLT_STATE_ERROR) ||
 561                 (ctxt->state == XSLT_STATE_STOPPED)){
 562                 yaz_log(YLOG_WARN, "XSLT transformation failed from %s",
 563                         cl->database->database->url);
 564                 xmlFreeDoc(new);
 565                 xmlFreeDoc(rdoc);
 566                 return 0;
 567             }
 568         }
 569 #endif
 570
 571         xmlFreeDoc(rdoc);
 572         rdoc = new;
 573     }
 574     if (global_parameters.dump_records)
 575     {
 576         fprintf(stderr, "Record from %s\n----------------\n",
 577                 cl->database->database->url);
 578 #if LIBXML_VERSION >= 20600
 579         xmlDocFormatDump(stderr, rdoc, 1);
 580 #else
 581         xmlDocDump(stderr, rdoc);
 582 #endif
 583     }
 584     return rdoc;
 585 }
 586
 587 // Extract what appears to be years from buf, storing highest and
 588 // lowest values.
 589 static int extract_years(const char *buf, int *first, int *last)
 590 {
 591     *first = -1;
 592     *last = -1;
 593     while (*buf)
 594     {
 595         const char *e;
 596         int len;
 597
 598         while (*buf && !isdigit(*buf))
 599             buf++;
 600         len = 0;
 601         for (e = buf; *e && isdigit(*e); e++)
 602             len++;
 603         if (len == 4)
 604         {
 605             int value = atoi(buf);
 606             if (*first < 0 || value < *first)
 607                 *first = value;
 608             if (*last < 0 || value > *last)
 609                 *last = value;
 610         }
 611         buf = e;
 612     }
 613     return *first;
 614 }
 615
 616 static struct record *ingest_record(struct client *cl, Z_External *rec)
 617 {
 618     xmlDoc *xdoc = normalize_record(cl, rec);
 619     xmlNode *root, *n;
 620     struct record *res;
 621     struct record_cluster *cluster;
 622     struct session *se = cl->session;
 623     xmlChar *mergekey, *mergekey_norm;
 624     xmlChar *type = 0;
 625     xmlChar *value = 0;
 626     struct conf_service *service = global_parameters.server->service;
 627
 628     if (!xdoc)
 629         return 0;
 630
 631     root = xmlDocGetRootElement(xdoc);
 632     if (!(mergekey = xmlGetProp(root, (xmlChar *) "mergekey")))
 633     {
 634         yaz_log(YLOG_WARN, "No mergekey found in record");
 635         xmlFreeDoc(xdoc);
 636         return 0;
 637     }
 638
 639     res = nmem_malloc(se->nmem, sizeof(struct record));
 640     res->next = 0;
 641     res->client = cl;
 642     res->metadata = nmem_malloc(se->nmem,
 643             sizeof(struct record_metadata*) * service->num_metadata);
 644     memset(res->metadata, 0, sizeof(struct record_metadata*) * service->num_metadata);
 645
 646     mergekey_norm = (xmlChar *) nmem_strdup(se->nmem, (char*) mergekey);
 647     xmlFree(mergekey);
 648     normalize_mergekey((char *) mergekey_norm, 0);
 649
 650     cluster = reclist_insert(se->reclist, res, (char *) mergekey_norm,
 651                              &se->total_merged);
 652     if (global_parameters.dump_records)
 653         yaz_log(YLOG_LOG, "Cluster id %d from %s (#%d)", cluster->recid,
 654                 cl->database->database->url, cl->records);
 655     if (!cluster)
 656     {
 657         /* no room for record */
 658         xmlFreeDoc(xdoc);
 659         return 0;
 660     }
 661     relevance_newrec(se->relevance, cluster);
 662
 663     for (n = root->children; n; n = n->next)
 664     {
 665         if (type)
 666             xmlFree(type);
 667         if (value)
 668             xmlFree(value);
 669         type = value = 0;
 670
 671         if (n->type != XML_ELEMENT_NODE)
 672             continue;
 673         if (!strcmp((const char *) n->name, "metadata"))
 674         {
 675             struct conf_metadata *md = 0;
 676             struct conf_sortkey *sk = 0;
 677             struct record_metadata **wheretoput, *newm;
 678             int imeta;
 679             int first, last;
 680
 681             type = xmlGetProp(n, (xmlChar *) "type");
 682             value = xmlNodeListGetString(xdoc, n->children, 0);
 683
 684             if (!type || !value)
 685                 continue;
 686
 687             // First, find out what field we're looking at
 688             for (imeta = 0; imeta < service->num_metadata; imeta++)
 689                 if (!strcmp((const char *) type, service->metadata[imeta].name))
 690                 {
 691                     md = &service->metadata[imeta];
 692                     if (md->sortkey_offset >= 0)
 693                         sk = &service->sortkeys[md->sortkey_offset];
 694                     break;
 695                 }
 696             if (!md)
 697             {
 698                 yaz_log(YLOG_WARN, "Ignoring unknown metadata element: %s", type);
 699                 continue;
 700             }
 701
 702             // Find out where we are putting it
 703             if (md->merge == Metadata_merge_no)
 704                 wheretoput = &res->metadata[imeta];
 705             else
 706                 wheretoput = &cluster->metadata[imeta];
 707
 708             // Put it there
 709             newm = nmem_malloc(se->nmem, sizeof(struct record_metadata));
 710             newm->next = 0;
 711             if (md->type == Metadata_type_generic)
 712             {
 713                 char *p, *pe;
 714                 for (p = (char *) value; *p && isspace(*p); p++)
 715                     ;
 716                 for (pe = p + strlen(p) - 1;
 717                         pe > p && strchr(" ,/.:([", *pe); pe--)
 718                     *pe = '\0';
 719                 newm->data.text = nmem_strdup(se->nmem, p);
 720
 721             }
 722             else if (md->type == Metadata_type_year)
 723             {
 724                 if (extract_years((char *) value, &first, &last) < 0)
 725                     continue;
 726             }
 727             else
 728             {
 729                 yaz_log(YLOG_WARN, "Unknown type in metadata element %s", type);
 730                 continue;
 731             }
 732             if (md->type == Metadata_type_year && md->merge != Metadata_merge_range)
 733             {
 734                 yaz_log(YLOG_WARN, "Only range merging supported for years");
 735                 continue;
 736             }
 737             if (md->merge == Metadata_merge_unique)
 738             {
 739                 struct record_metadata *mnode;
 740                 for (mnode = *wheretoput; mnode; mnode = mnode->next)
 741                     if (!strcmp((const char *) mnode->data.text, newm->data.text))
 742                         break;
 743                 if (!mnode)
 744                 {
 745                     newm->next = *wheretoput;
 746                     *wheretoput = newm;
 747                 }
 748             }
 749             else if (md->merge == Metadata_merge_longest)
 750             {
 751                 if (!*wheretoput ||
 752                         strlen(newm->data.text) > strlen((*wheretoput)->data.text))
 753                 {
 754                     *wheretoput = newm;
 755                     if (sk)
 756                     {
 757                         char *s = nmem_strdup(se->nmem, newm->data.text);
 758                         if (!cluster->sortkeys[md->sortkey_offset])
 759                             cluster->sortkeys[md->sortkey_offset] =
 760                                 nmem_malloc(se->nmem, sizeof(union data_types));
 761                         normalize_mergekey(s,
 762                                 (sk->type == Metadata_sortkey_skiparticle));
 763                         cluster->sortkeys[md->sortkey_offset]->text = s;
 764                     }
 765                 }
 766             }
 767             else if (md->merge == Metadata_merge_all || md->merge == Metadata_merge_no)
 768             {
 769                 newm->next = *wheretoput;
 770                 *wheretoput = newm;
 771             }
 772             else if (md->merge == Metadata_merge_range)
 773             {
 774                 assert(md->type == Metadata_type_year);
 775                 if (!*wheretoput)
 776                 {
 777                     *wheretoput = newm;
 778                     (*wheretoput)->data.number.min = first;
 779                     (*wheretoput)->data.number.max = last;
 780                     if (sk)
 781                         cluster->sortkeys[md->sortkey_offset] = &newm->data;
 782                 }
 783                 else
 784                 {
 785                     if (first < (*wheretoput)->data.number.min)
 786                         (*wheretoput)->data.number.min = first;
 787                     if (last > (*wheretoput)->data.number.max)
 788                         (*wheretoput)->data.number.max = last;
 789                 }
 790 #ifdef GAGA
 791                 if (sk)
 792                 {
 793                     union data_types *sdata = cluster->sortkeys[md->sortkey_offset];
 794                     yaz_log(YLOG_LOG, "SK range: %d-%d", sdata->number.min, sdata->number.max);
 795                 }
 796 #endif
 797             }
 798             else
 799                 yaz_log(YLOG_WARN, "Don't know how to merge on element name %s", md->name);
 800
 801             if (md->rank)
 802                 relevance_countwords(se->relevance, cluster,
 803                                      (char *) value, md->rank);
 804             if (md->termlist)
 805             {
 806                 if (md->type == Metadata_type_year)
 807                 {
 808                     char year[64];
 809                     sprintf(year, "%d", last);
 810                     add_facet(se, (char *) type, year);
 811                     if (first != last)
 812                     {
 813                         sprintf(year, "%d", first);
 814                         add_facet(se, (char *) type, year);
 815                     }
 816                 }
 817                 else
 818                     add_facet(se, (char *) type, (char *) value);
 819             }
 820             xmlFree(type);
 821             xmlFree(value);
 822             type = value = 0;
 823         }
 824         else
 825             yaz_log(YLOG_WARN, "Unexpected element %s in internal record", n->name);
 826     }
 827     if (type)
 828         xmlFree(type);
 829     if (value)
 830         xmlFree(value);
 831
 832     xmlFreeDoc(xdoc);
 833
 834     relevance_donerecord(se->relevance, cluster);
 835     se->total_records++;
 836
 837     return res;
 838 }
 839
 840 // Retrieve first defined value for 'name' for given database.
 841 // Will be extended to take into account user associated with session
 842 char *session_setting_oneval(struct session_database *db, int offset)
 843 {
 844     if (!db->settings[offset])
 845         return "";
 846     return db->settings[offset]->value;
 847 }
 848
 849 static void ingest_records(struct client *cl, Z_Records *r)
 850 {
 851 #if USE_TIMING
 852     yaz_timing_t t = yaz_timing_create();
 853 #endif
 854     struct record *rec;
 855     struct session *s = cl->session;
 856     Z_NamePlusRecordList *rlist;
 857     int i;
 858
 859     if (r->which != Z_Records_DBOSD)
 860         return;
 861     rlist = r->u.databaseOrSurDiagnostics;
 862     for (i = 0; i < rlist->num_records; i++)
 863     {
 864         Z_NamePlusRecord *npr = rlist->records[i];
 865
 866         cl->records++;
 867         if (npr->which != Z_NamePlusRecord_databaseRecord)
 868         {
 869             yaz_log(YLOG_WARN,
 870                     "Unexpected record type, probably diagnostic %s",
 871                     cl->database->database->url);
 872             continue;
 873         }
 874
 875         rec = ingest_record(cl, npr->u.databaseRecord);
 876         if (!rec)
 877             continue;
 878     }
 879     if (s->watchlist[SESSION_WATCH_RECORDS].fun && rlist->num_records)
 880         session_alert_watch(s, SESSION_WATCH_RECORDS);
 881
 882 #if USE_TIMING
 883     yaz_timing_stop(t);
 884     yaz_log(YLOG_LOG, "ingest_records %6.5f %3.2f %3.2f",
 885             yaz_timing_get_real(t), yaz_timing_get_user(t),
 886             yaz_timing_get_sys(t));
 887     yaz_timing_destroy(&t);
 888 #endif
 889 }
 890
 891 static void do_presentResponse(IOCHAN i, Z_APDU *a)
 892 {
 893     struct connection *co = iochan_getdata(i);
 894     struct client *cl = co->client;
 895     Z_PresentResponse *r = a->u.presentResponse;
 896
 897     if (r->records) {
 898         Z_Records *recs = r->records;
 899         if (recs->which == Z_Records_NSD)
 900         {
 901             yaz_log(YLOG_WARN, "Non-surrogate diagnostic %s",
 902                     cl->database->database->url);
 903             cl->diagnostic = *recs->u.nonSurrogateDiagnostic->condition;
 904             cl->state = Client_Error;
 905         }
 906     }
 907
 908     if (!*r->presentStatus && cl->state != Client_Error)
 909     {
 910         yaz_log(YLOG_DEBUG, "Good Present response %s",
 911                 cl->database->database->url);
 912         ingest_records(cl, r->records);
 913         cl->state = Client_Idle;
 914     }
 915     else if (*r->presentStatus)
 916     {
 917         yaz_log(YLOG_WARN, "Bad Present response %s",
 918                 cl->database->database->url);
 919         cl->state = Client_Error;
 920     }
 921 }
 922
 923 static void handler(IOCHAN i, int event)
 924 {
 925     struct connection *co = iochan_getdata(i);
 926     struct client *cl = co->client;
 927     struct session *se = 0;
 928
 929     if (cl)
 930         se = cl->session;
 931     else
 932     {
 933         yaz_log(YLOG_WARN, "Destroying orphan connection");
 934         connection_destroy(co);
 935         return;
 936     }
 937
 938     if (co->state == Conn_Connecting && event & EVENT_OUTPUT)
 939     {
 940         int errcode;
 941         socklen_t errlen = sizeof(errcode);
 942
 943         if (getsockopt(cs_fileno(co->link), SOL_SOCKET, SO_ERROR, &errcode,
 944             &errlen) < 0 || errcode != 0)
 945         {
 946             client_fatal(cl);
 947             return;
 948         }
 949         else
 950         {
 951             yaz_log(YLOG_DEBUG, "Connect OK");
 952             co->state = Conn_Open;
 953             if (cl)
 954                 cl->state = Client_Connected;
 955         }
 956     }
 957
 958     else if (event & EVENT_INPUT)
 959     {
 960         int len = cs_get(co->link, &co->ibuf, &co->ibufsize);
 961
 962         if (len < 0)
 963         {
 964             yaz_log(YLOG_WARN|YLOG_ERRNO, "Error reading from %s",
 965                     cl->database->database->url);
 966             connection_destroy(co);
 967             return;
 968         }
 969         else if (len == 0)
 970         {
 971             yaz_log(YLOG_WARN, "EOF reading from %s", cl->database->database->url);
 972             connection_destroy(co);
 973             return;
 974         }
 975         else if (len > 1) // We discard input if we have no connection
 976         {
 977             co->state = Conn_Open;
 978
 979             if (cl && (cl->requestid == se->requestid || cl->state == Client_Initializing))
 980             {
 981                 Z_APDU *a;
 982
 983                 odr_reset(global_parameters.odr_in);
 984                 odr_setbuf(global_parameters.odr_in, co->ibuf, len, 0);
 985                 if (!z_APDU(global_parameters.odr_in, &a, 0, 0))
 986                 {
 987                     client_fatal(cl);
 988                     return;
 989                 }
 990                 switch (a->which)
 991                 {
 992                     case Z_APDU_initResponse:
 993                         do_initResponse(i, a);
 994                         break;
 995                     case Z_APDU_searchResponse:
 996                         do_searchResponse(i, a);
 997                         break;
 998                     case Z_APDU_presentResponse:
 999                         do_presentResponse(i, a);
1000                         break;
1001                     case Z_APDU_close:
1002                         do_closeResponse(i, a);
1003                         break;
1004                     default:
1005                         yaz_log(YLOG_WARN,
1006                                 "Unexpected Z39.50 response from %s",
1007                                 cl->database->database->url);
1008                         client_fatal(cl);
1009                         return;
1010                 }
1011                 // We aren't expecting staggered output from target
1012                 // if (cs_more(t->link))
1013                 //    iochan_setevent(i, EVENT_INPUT);
1014             }
1015             else  // we throw away response and go to idle mode
1016             {
1017                 yaz_log(YLOG_DEBUG, "Ignoring result of expired operation");
1018                 cl->state = Client_Idle;
1019             }
1020         }
1021         /* if len==1 we do nothing but wait for more input */
1022     }
1023
1024     if (cl->state == Client_Connected) {
1025         send_init(i);
1026     }
1027
1028     if (cl->state == Client_Idle)
1029     {
1030         if (cl->requestid != se->requestid && *se->query) {
1031             send_search(i);
1032         }
1033         else if (cl->hits > 0 && cl->records < global_parameters.toget &&
1034             cl->records < cl->hits) {
1035             send_present(i);
1036         }
1037     }
1038 }
1039
1040 // Disassociate connection from client
1041 static void connection_release(struct connection *co)
1042 {
1043     struct client *cl = co->client;
1044
1045     yaz_log(YLOG_DEBUG, "Connection release %s", co->host->hostport);
1046     if (!cl)
1047         return;
1048     cl->connection = 0;
1049     co->client = 0;
1050 }
1051
1052 // Close connection and recycle structure
1053 static void connection_destroy(struct connection *co)
1054 {
1055     struct host *h = co->host;
1056     cs_close(co->link);
1057     iochan_destroy(co->iochan);
1058
1059     yaz_log(YLOG_DEBUG, "Connection destroy %s", co->host->hostport);
1060     if (h->connections == co)
1061         h->connections = co->next;
1062     else
1063     {
1064         struct connection *pco;
1065         for (pco = h->connections; pco && pco->next != co; pco = pco->next)
1066             ;
1067         if (pco)
1068             pco->next = co->next;
1069         else
1070             abort();
1071     }
1072     if (co->client)
1073     {
1074         if (co->client->state != Client_Idle)
1075             co->client->state = Client_Disconnected;
1076         co->client->connection = 0;
1077     }
1078     co->next = connection_freelist;
1079     connection_freelist = co;
1080 }
1081
1082 // Creates a new connection for client, associated with the host of
1083 // client's database
1084 static struct connection *connection_create(struct client *cl)
1085 {
1086     struct connection *new;
1087     COMSTACK link;
1088     int res;
1089     void *addr;
1090
1091
1092     if (!(link = cs_create(tcpip_type, 0, PROTO_Z3950)))
1093         {
1094             yaz_log(YLOG_FATAL|YLOG_ERRNO, "Failed to create comstack");
1095             exit(1);
1096         }
1097
1098     if (0 == strlen(global_parameters.zproxy_override)){
1099         /* no Z39.50 proxy needed - direct connect */
1100         yaz_log(YLOG_DEBUG, "Connection create %s", cl->database->database->url);
1101
1102         if (!(addr = cs_straddr(link, cl->database->database->host->ipport)))
1103             {
1104                 yaz_log(YLOG_WARN|YLOG_ERRNO,
1105                         "Lookup of IP address %s failed",
1106                         cl->database->database->host->ipport);
1107                 return 0;
1108             }
1109
1110     } else {
1111         /* Z39.50 proxy connect */
1112         yaz_log(YLOG_DEBUG, "Connection create %s proxy %s",
1113                 cl->database->database->url, global_parameters.zproxy_override);
1114
1115         if (!(addr = cs_straddr(link, global_parameters.zproxy_override)))
1116             {
1117                 yaz_log(YLOG_WARN|YLOG_ERRNO,
1118                         "Lookup of IP address %s failed",
1119                         global_parameters.zproxy_override);
1120                 return 0;
1121             }
1122     }
1123
1124     res = cs_connect(link, addr);
1125     if (res < 0)
1126     {
1127         yaz_log(YLOG_WARN|YLOG_ERRNO, "cs_connect %s", cl->database->database->url);
1128         return 0;
1129     }
1130
1131     if ((new = connection_freelist))
1132         connection_freelist = new->next;
1133     else
1134     {
1135         new = xmalloc(sizeof (struct connection));
1136         new->ibuf = 0;
1137         new->ibufsize = 0;
1138     }
1139     new->state = Conn_Connecting;
1140     new->host = cl->database->database->host;
1141     new->next = new->host->connections;
1142     new->host->connections = new;
1143     new->client = cl;
1144     cl->connection = new;
1145     new->link = link;
1146
1147     new->iochan = iochan_create(cs_fileno(link), handler, 0);
1148     iochan_setdata(new->iochan, new);
1149     new->iochan->next = channel_list;
1150     channel_list = new->iochan;
1151     return new;
1152 }
1153
1154 // Close connection and set state to error
1155 static void client_fatal(struct client *cl)
1156 {
1157     yaz_log(YLOG_WARN, "Fatal error from %s", cl->database->database->url);
1158     connection_destroy(cl->connection);
1159     cl->state = Client_Error;
1160 }
1161
1162 // Ensure that client has a connection associated
1163 static int client_prep_connection(struct client *cl)
1164 {
1165     struct connection *co;
1166     struct session *se = cl->session;
1167     struct host *host = cl->database->database->host;
1168
1169     co = cl->connection;
1170
1171     yaz_log(YLOG_DEBUG, "Client prep %s", cl->database->database->url);
1172
1173     if (!co)
1174     {
1175         // See if someone else has an idle connection
1176         // We should look at timestamps here to select the longest-idle connection
1177         for (co = host->connections; co; co = co->next)
1178             if (co->state == Conn_Open && (!co->client || co->client->session != se))
1179                 break;
1180         if (co)
1181         {
1182             connection_release(co);
1183             cl->connection = co;
1184             co->client = cl;
1185         }
1186         else
1187             co = connection_create(cl);
1188     }
1189     if (co)
1190     {
1191         if (co->state == Conn_Connecting)
1192         {
1193             cl->state = Client_Connecting;
1194             iochan_setflag(co->iochan, EVENT_OUTPUT);
1195         }
1196         else if (co->state == Conn_Open)
1197         {
1198             if (cl->state == Client_Error || cl->state == Client_Disconnected)
1199                 cl->state = Client_Idle;
1200             iochan_setflag(co->iochan, EVENT_OUTPUT);
1201         }
1202         return 1;
1203     }
1204     else
1205         return 0;
1206 }
1207
1208 static struct client *client_create(void)
1209 {
1210     struct client *r;
1211     if (client_freelist)
1212     {
1213         r = client_freelist;
1214         client_freelist = client_freelist->next;
1215     }
1216     else
1217         r = xmalloc(sizeof(struct client));
1218     r->database = 0;
1219     r->connection = 0;
1220     r->session = 0;
1221     r->hits = 0;
1222     r->records = 0;
1223     r->setno = 0;
1224     r->requestid = -1;
1225     r->diagnostic = 0;
1226     r->state = Client_Disconnected;
1227     r->next = 0;
1228     return r;
1229 }
1230
1231 void client_destroy(struct client *c)
1232 {
1233     struct session *se = c->session;
1234     if (c == se->clients)
1235         se->clients = c->next;
1236     else
1237     {
1238         struct client *cc;
1239         for (cc = se->clients; cc && cc->next != c; cc = cc->next)
1240             ;
1241         if (cc)
1242             cc->next = c->next;
1243     }
1244     if (c->connection)
1245         connection_release(c->connection);
1246     c->next = client_freelist;
1247     client_freelist = c;
1248 }
1249
1250 void session_set_watch(struct session *s, int what, session_watchfun fun, void *data)
1251 {
1252     s->watchlist[what].fun = fun;
1253     s->watchlist[what].data = data;
1254 }
1255
1256 void session_alert_watch(struct session *s, int what)
1257 {
1258     if (!s->watchlist[what].fun)
1259         return;
1260     (*s->watchlist[what].fun)(s->watchlist[what].data);
1261     s->watchlist[what].fun = 0;
1262     s->watchlist[what].data = 0;
1263 }
1264
1265 //callback for grep_databases
1266 static void select_targets_callback(void *context, struct session_database *db)
1267 {
1268     struct session *se = (struct session*) context;
1269     struct client *cl = client_create();
1270     cl->database = db;
1271     cl->session = se;
1272     cl->next = se->clients;
1273     se->clients = cl;
1274 }
1275
1276 // Associates a set of clients with a session;
1277 // Note: Session-databases represent databases with per-session setting overrides
1278 int select_targets(struct session *se, struct database_criterion *crit)
1279 {
1280     while (se->clients)
1281         client_destroy(se->clients);
1282
1283     return session_grep_databases(se, crit, select_targets_callback);
1284 }
1285
1286 int session_active_clients(struct session *s)
1287 {
1288     struct client *c;
1289     int res = 0;
1290
1291     for (c = s->clients; c; c = c->next)
1292         if (c->connection && (c->state == Client_Connecting ||
1293                     c->state == Client_Initializing ||
1294                     c->state == Client_Searching ||
1295                     c->state == Client_Presenting))
1296             res++;
1297
1298     return res;
1299 }
1300
1301 // parses crit1=val1,crit2=val2|val3,...
1302 static struct database_criterion *parse_filter(NMEM m, const char *buf)
1303 {
1304     struct database_criterion *res = 0;
1305     char **values;
1306     int num;
1307     int i;
1308
1309     if (!buf || !*buf)
1310         return 0;
1311     nmem_strsplit(m, ",", buf,  &values, &num);
1312     for (i = 0; i < num; i++)
1313     {
1314         char **subvalues;
1315         int subnum;
1316         int subi;
1317         struct database_criterion *new = nmem_malloc(m, sizeof(*new));
1318         char *eq = strchr(values[i], '=');
1319         if (!eq)
1320         {
1321             yaz_log(YLOG_WARN, "Missing equal-sign in filter");
1322             return 0;
1323         }
1324         *(eq++) = '\0';
1325         new->name = values[i];
1326         nmem_strsplit(m, "|", eq, &subvalues, &subnum);
1327         new->values = 0;
1328         for (subi = 0; subi < subnum; subi++)
1329         {
1330             struct database_criterion_value *newv = nmem_malloc(m, sizeof(*newv));
1331             newv->value = subvalues[subi];
1332             newv->next = new->values;
1333             new->values = newv;
1334         }
1335         new->next = res;
1336         res = new;
1337     }
1338     return res;
1339 }
1340
1341 char *search(struct session *se, char *query, char *filter)
1342 {
1343     int live_channels = 0;
1344     struct client *cl;
1345     struct database_criterion *criteria;
1346
1347     yaz_log(YLOG_DEBUG, "Search");
1348
1349     nmem_reset(se->nmem);
1350     criteria = parse_filter(se->nmem, filter);
1351     strcpy(se->query, query);
1352     se->requestid++;
1353     select_targets(se, criteria);
1354     for (cl = se->clients; cl; cl = cl->next)
1355     {
1356         if (client_prep_connection(cl))
1357             live_channels++;
1358     }
1359     if (live_channels)
1360     {
1361         int maxrecs = live_channels * global_parameters.toget;
1362         se->num_termlists = 0;
1363         se->reclist = reclist_create(se->nmem, maxrecs);
1364         // This will be initialized in send_search()
1365         se->relevance = 0;
1366         se->total_records = se->total_hits = se->total_merged = 0;
1367         se->expected_maxrecs = maxrecs;
1368     }
1369     else
1370         return "NOTARGETS";
1371
1372     return 0;
1373 }
1374
1375 // Apply a session override to a database
1376 void session_apply_setting(struct session *se, char *dbname, char *setting, char *value)
1377 {
1378     struct session_database *sdb;
1379
1380     for (sdb = se->databases; sdb; sdb = sdb->next)
1381         if (!strcmp(dbname, sdb->database->url))
1382         {
1383             struct setting *new = nmem_malloc(se->session_nmem, sizeof(*new));
1384             int offset = settings_offset(setting);
1385
1386             if (offset < 0)
1387             {
1388                 yaz_log(YLOG_WARN, "Unknown setting %s", setting);
1389                 return;
1390             }
1391             new->precedence = 0;
1392             new->target = dbname;
1393             new->name = setting;
1394             new->value = value;
1395             new->next = sdb->settings[offset];
1396             sdb->settings[offset] = new;
1397             break;
1398         }
1399     if (!sdb)
1400         yaz_log(YLOG_WARN, "Unknown database in setting override: %s", dbname);
1401 }
1402
1403 void session_init_databases_fun(void *context, struct database *db)
1404 {
1405     struct session *se = (struct session *) context;
1406     struct session_database *new = nmem_malloc(se->session_nmem, sizeof(*new));
1407     int num = settings_num();
1408     int i;
1409
1410     new->database = db;
1411     new->settings = nmem_malloc(se->session_nmem, sizeof(struct settings *) * num);
1412     for (i = 0; i < num; i++)
1413         new->settings[i] = db->settings[i];
1414     new->next = se->databases;
1415     se->databases = new;
1416 }
1417
1418 // Initialize session_database list -- this represents this session's view
1419 // of the database list -- subject to modification by the settings ws command
1420 void session_init_databases(struct session *se)
1421 {
1422     se->databases = 0;
1423     grep_databases(se, 0, session_init_databases_fun);
1424 }
1425
1426 void destroy_session(struct session *s)
1427 {
1428     yaz_log(YLOG_LOG, "Destroying session");
1429     while (s->clients)
1430         client_destroy(s->clients);
1431     nmem_destroy(s->nmem);
1432     wrbuf_destroy(s->wrbuf);
1433 }
1434
1435 struct session *new_session(NMEM nmem)
1436 {
1437     int i;
1438     struct session *session = nmem_malloc(nmem, sizeof(*session));
1439
1440     yaz_log(YLOG_DEBUG, "New Pazpar2 session");
1441
1442     session->total_hits = 0;
1443     session->total_records = 0;
1444     session->num_termlists = 0;
1445     session->reclist = 0;
1446     session->requestid = -1;
1447     session->clients = 0;
1448     session->expected_maxrecs = 0;
1449     session->query[0] = '\0';
1450     session->session_nmem = nmem;
1451     session->nmem = nmem_create();
1452     session->wrbuf = wrbuf_alloc();
1453     session_init_databases(session);
1454     for (i = 0; i <= SESSION_WATCH_MAX; i++)
1455     {
1456         session->watchlist[i].data = 0;
1457         session->watchlist[i].fun = 0;
1458     }
1459
1460     return session;
1461 }
1462
1463 struct hitsbytarget *hitsbytarget(struct session *se, int *count)
1464 {
1465     static struct hitsbytarget res[1000]; // FIXME MM
1466     struct client *cl;
1467
1468     *count = 0;
1469     for (cl = se->clients; cl; cl = cl->next)
1470     {
1471         char *name = session_setting_oneval(cl->database, PZ_NAME);
1472
1473         res[*count].id = cl->database->database->url;
1474         res[*count].name = *name ? name : "Unknown";
1475         res[*count].hits = cl->hits;
1476         res[*count].records = cl->records;
1477         res[*count].diagnostic = cl->diagnostic;
1478         res[*count].state = client_states[cl->state];
1479         res[*count].connected  = cl->connection ? 1 : 0;
1480         (*count)++;
1481     }
1482
1483     return res;
1484 }
1485
1486 struct termlist_score **termlist(struct session *s, const char *name, int *num)
1487 {
1488     int i;
1489
1490     for (i = 0; i < s->num_termlists; i++)
1491         if (!strcmp((const char *) s->termlists[i].name, name))
1492             return termlist_highscore(s->termlists[i].termlist, num);
1493     return 0;
1494 }
1495
1496 #ifdef MISSING_HEADERS
1497 void report_nmem_stats(void)
1498 {
1499     size_t in_use, is_free;
1500
1501     nmem_get_memory_in_use(&in_use);
1502     nmem_get_memory_free(&is_free);
1503
1504     yaz_log(YLOG_LOG, "nmem stat: use=%ld free=%ld",
1505             (long) in_use, (long) is_free);
1506 }
1507 #endif
1508
1509 struct record_cluster *show_single(struct session *s, int id)
1510 {
1511     struct record_cluster *r;
1512
1513     reclist_rewind(s->reclist);
1514     while ((r = reclist_read_record(s->reclist)))
1515         if (r->recid == id)
1516             return r;
1517     return 0;
1518 }
1519
1520 struct record_cluster **show(struct session *s, struct reclist_sortparms *sp, int start,
1521         int *num, int *total, int *sumhits, NMEM nmem_show)
1522 {
1523     struct record_cluster **recs = nmem_malloc(nmem_show, *num
1524                                        * sizeof(struct record_cluster *));
1525     struct reclist_sortparms *spp;
1526     int i;
1527 #if USE_TIMING
1528     yaz_timing_t t = yaz_timing_create();
1529 #endif
1530
1531     for (spp = sp; spp; spp = spp->next)
1532         if (spp->type == Metadata_sortkey_relevance)
1533         {
1534             relevance_prepare_read(s->relevance, s->reclist);
1535             break;
1536         }
1537     reclist_sort(s->reclist, sp);
1538
1539     *total = s->reclist->num_records;
1540     *sumhits = s->total_hits;
1541
1542     for (i = 0; i < start; i++)
1543         if (!reclist_read_record(s->reclist))
1544         {
1545             *num = 0;
1546             recs = 0;
1547             break;
1548         }
1549
1550     for (i = 0; i < *num; i++)
1551     {
1552         struct record_cluster *r = reclist_read_record(s->reclist);
1553         if (!r)
1554         {
1555             *num = i;
1556             break;
1557         }
1558         recs[i] = r;
1559     }
1560 #if USE_TIMING
1561     yaz_timing_stop(t);
1562     yaz_log(YLOG_LOG, "show %6.5f %3.2f %3.2f",
1563             yaz_timing_get_real(t), yaz_timing_get_user(t),
1564             yaz_timing_get_sys(t));
1565     yaz_timing_destroy(&t);
1566 #endif
1567     return recs;
1568 }
1569
1570 void statistics(struct session *se, struct statistics *stat)
1571 {
1572     struct client *cl;
1573     int count = 0;
1574
1575     memset(stat, 0, sizeof(*stat));
1576     for (cl = se->clients; cl; cl = cl->next)
1577     {
1578         if (!cl->connection)
1579             stat->num_no_connection++;
1580         switch (cl->state)
1581         {
1582             case Client_Connecting: stat->num_connecting++; break;
1583             case Client_Initializing: stat->num_initializing++; break;
1584             case Client_Searching: stat->num_searching++; break;
1585             case Client_Presenting: stat->num_presenting++; break;
1586             case Client_Idle: stat->num_idle++; break;
1587             case Client_Failed: stat->num_failed++; break;
1588             case Client_Error: stat->num_error++; break;
1589             default: break;
1590         }
1591         count++;
1592     }
1593     stat->num_hits = se->total_hits;
1594     stat->num_records = se->total_records;
1595
1596     stat->num_clients = count;
1597 }
1598
1599 static void start_http_listener(void)
1600 {
1601     char hp[128] = "";
1602     struct conf_server *ser = global_parameters.server;
1603
1604     if (*global_parameters.listener_override)
1605         strcpy(hp, global_parameters.listener_override);
1606     else
1607     {
1608         strcpy(hp, ser->host ? ser->host : "");
1609         if (ser->port)
1610         {
1611             if (*hp)
1612                 strcat(hp, ":");
1613             sprintf(hp + strlen(hp), "%d", ser->port);
1614         }
1615     }
1616     http_init(hp);
1617 }
1618
1619 static void start_proxy(void)
1620 {
1621     char hp[128] = "";
1622     struct conf_server *ser = global_parameters.server;
1623
1624     if (*global_parameters.proxy_override)
1625         strcpy(hp, global_parameters.proxy_override);
1626     else if (ser->proxy_host || ser->proxy_port)
1627     {
1628         strcpy(hp, ser->proxy_host ? ser->proxy_host : "");
1629         if (ser->proxy_port)
1630         {
1631             if (*hp)
1632                 strcat(hp, ":");
1633             sprintf(hp + strlen(hp), "%d", ser->proxy_port);
1634         }
1635     }
1636     else
1637         return;
1638
1639     http_set_proxyaddr(hp, ser->myurl ? ser->myurl : "");
1640 }
1641
1642 static void start_zproxy(void)
1643 {
1644     struct conf_server *ser = global_parameters.server;
1645
1646     if (*global_parameters.zproxy_override){
1647         yaz_log(YLOG_LOG, "Z39.50 proxy  %s",
1648                 global_parameters.zproxy_override);
1649         return;
1650     }
1651
1652     else if (ser->zproxy_host || ser->zproxy_port)
1653     {
1654         char hp[128] = "";
1655
1656         strcpy(hp, ser->zproxy_host ? ser->zproxy_host : "");
1657         if (ser->zproxy_port)
1658         {
1659             if (*hp)
1660                 strcat(hp, ":");
1661             else
1662                 strcat(hp, "@:");
1663
1664             sprintf(hp + strlen(hp), "%d", ser->zproxy_port);
1665         }
1666         strcpy(global_parameters.zproxy_override, hp);
1667         yaz_log(YLOG_LOG, "Z39.50 proxy  %s",
1668                 global_parameters.zproxy_override);
1669
1670     }
1671     else
1672         return;
1673 }
1674
1675
1676
1677 int main(int argc, char **argv)
1678 {
1679     int ret;
1680     char *arg;
1681
1682     if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
1683         yaz_log(YLOG_WARN|YLOG_ERRNO, "signal");
1684
1685     yaz_log_init(YLOG_DEFAULT_LEVEL, "pazpar2", 0);
1686
1687     while ((ret = options("t:f:x:h:p:z:s:d", argv, argc, &arg)) != -2)
1688     {
1689         switch (ret) {
1690             case 'f':
1691                 if (!read_config(arg))
1692                     exit(1);
1693                 break;
1694             case 'h':
1695                 strcpy(global_parameters.listener_override, arg);
1696                 break;
1697             case 'p':
1698                 strcpy(global_parameters.proxy_override, arg);
1699                 break;
1700             case 'z':
1701                 strcpy(global_parameters.zproxy_override, arg);
1702                 break;
1703             case 't':
1704                 strcpy(global_parameters.settings_path_override, arg);
1705                 break;
1706             case 's':
1707                 load_simpletargets(arg);
1708                 break;
1709             case 'd':
1710                 global_parameters.dump_records = 1;
1711                 break;
1712             default:
1713                 fprintf(stderr, "Usage: pazpar2\n"
1714                         "    -f configfile\n"
1715                         "    -h [host:]port          (REST protocol listener)\n"
1716                         "    -C cclconfig\n"
1717                         "    -s simpletargetfile\n"
1718                         "    -p hostname[:portno]    (HTTP proxy)\n"
1719                         "    -z hostname[:portno]    (Z39.50 proxy)\n"
1720                         "    -d                      (show internal records)\n");
1721                 exit(1);
1722         }
1723     }
1724
1725     if (!config)
1726     {
1727         yaz_log(YLOG_FATAL, "Load config with -f");
1728         exit(1);
1729     }
1730     global_parameters.server = config->servers;
1731
1732     start_http_listener();
1733     start_proxy();
1734     start_zproxy();
1735
1736     if (*global_parameters.settings_path_override)
1737         settings_read(global_parameters.settings_path_override);
1738     else if (global_parameters.server->settings)
1739         settings_read(global_parameters.server->settings);
1740     else
1741         yaz_log(YLOG_WARN, "No settings-directory specified. Problems may well ensue!");
1742     prepare_databases();
1743     global_parameters.odr_in = odr_createmem(ODR_DECODE);
1744     global_parameters.odr_out = odr_createmem(ODR_ENCODE);
1745
1746     event_loop(&channel_list);
1747
1748     return 0;
1749 }
1750
1751 /*
1752  * Local variables:
1753  * c-basic-offset: 4
1754  * indent-tabs-mode: nil
1755  * End:
1756  * vim: shiftwidth=4 tabstop=8 expandtab
1757  */