zutil/zoom-c.c

   1 /*
   2  * Copyright (c) 2000-2003, Index Data
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: zoom-c.c,v 1.39 2003-07-14 12:59:23 adam Exp $
   6  *
   7  * ZOOM layer for C, connections, result sets, queries.
   8  */
   9 #include <assert.h>
  10 #include <string.h>
  11 #include "zoom-p.h"
  12
  13 #include <yaz/yaz-util.h>
  14 #include <yaz/xmalloc.h>
  15 #include <yaz/otherinfo.h>
  16 #include <yaz/log.h>
  17 #include <yaz/pquery.h>
  18 #include <yaz/marcdisp.h>
  19 #include <yaz/diagbib1.h>
  20 #include <yaz/charneg.h>
  21 #include <yaz/ill.h>
  22 #include <yaz/srw.h>
  23
  24 #if HAVE_SYS_POLL_H
  25 #include <sys/poll.h>
  26 #endif
  27
  28 typedef enum {
  29     zoom_pending,
  30     zoom_complete
  31 } zoom_ret;
  32
  33 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c);
  34 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out);
  35
  36 static ZOOM_Event ZOOM_Event_create (int kind)
  37 {
  38     ZOOM_Event event = (ZOOM_Event) xmalloc (sizeof(*event));
  39     event->kind = kind;
  40     event->next = 0;
  41     event->prev = 0;
  42     return event;
  43 }
  44
  45 static void ZOOM_Event_destroy (ZOOM_Event event)
  46 {
  47     xfree (event);
  48 }
  49
  50 static void ZOOM_connection_put_event (ZOOM_connection c, ZOOM_Event event)
  51 {
  52     if (c->m_queue_back)
  53     {
  54         c->m_queue_back->prev = event;
  55         assert (c->m_queue_front);
  56     }
  57     else
  58     {
  59         assert (!c->m_queue_front);
  60         c->m_queue_front = event;
  61     }
  62     event->next = c->m_queue_back;
  63     event->prev = 0;
  64     c->m_queue_back = event;
  65 }
  66
  67 static ZOOM_Event ZOOM_connection_get_event(ZOOM_connection c)
  68 {
  69     ZOOM_Event event = c->m_queue_front;
  70     if (!event)
  71     {
  72         c->last_event = ZOOM_EVENT_NONE;
  73         return 0;
  74     }
  75     assert (c->m_queue_back);
  76     c->m_queue_front = event->prev;
  77     if (c->m_queue_front)
  78     {
  79         assert (c->m_queue_back);
  80         c->m_queue_front->next = 0;
  81     }
  82     else
  83         c->m_queue_back = 0;
  84     c->last_event = event->kind;
  85     return event;
  86 }
  87
  88
  89 static void set_dset_error (ZOOM_connection c, int error,
  90                             const char *dset,
  91                             const char *addinfo, const char *addinfo2)
  92 {
  93     xfree (c->addinfo);
  94     c->addinfo = 0;
  95     c->error = error;
  96     c->diagset = dset;
  97     if (addinfo && addinfo2)
  98     {
  99         c->addinfo = xmalloc(strlen(addinfo) + strlen(addinfo2) + 2);
 100         strcpy(c->addinfo, addinfo);
 101         strcat(c->addinfo, addinfo2);
 102     }
 103     else if (addinfo)
 104         c->addinfo = xstrdup(addinfo);
 105     if (error)
 106         yaz_log(LOG_DEBUG, "Error %s %s:%d %s %s",
 107                 c->host_port ? c->host_port : "<>", dset, error,
 108                 addinfo ? addinfo : "",
 109                 addinfo2 ? addinfo2 : "");
 110 }
 111
 112 #if HAVE_XML2
 113 static void set_HTTP_error (ZOOM_connection c, int error,
 114                             const char *addinfo, const char *addinfo2)
 115 {
 116     set_dset_error(c, error, "HTTP", addinfo, addinfo2);
 117 }
 118 #endif
 119
 120 static void set_ZOOM_error (ZOOM_connection c, int error,
 121                             const char *addinfo)
 122 {
 123     set_dset_error(c, error, "ZOOM", addinfo, 0);
 124 }
 125
 126 static void clear_error (ZOOM_connection c)
 127 {
 128
 129     switch (c->error)
 130     {
 131     case ZOOM_ERROR_CONNECT:
 132     case ZOOM_ERROR_MEMORY:
 133     case ZOOM_ERROR_DECODE:
 134     case ZOOM_ERROR_CONNECTION_LOST:
 135     case ZOOM_ERROR_INIT:
 136     case ZOOM_ERROR_INTERNAL:
 137     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
 138         break;
 139     default:
 140         set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 141     }
 142 }
 143
 144 ZOOM_task ZOOM_connection_add_task (ZOOM_connection c, int which)
 145 {
 146     ZOOM_task *taskp = &c->tasks;
 147     while (*taskp)
 148         taskp = &(*taskp)->next;
 149     *taskp = (ZOOM_task) xmalloc (sizeof(**taskp));
 150     (*taskp)->running = 0;
 151     (*taskp)->which = which;
 152     (*taskp)->next = 0;
 153     clear_error (c);
 154     return *taskp;
 155 }
 156
 157 ZOOM_task ZOOM_connection_insert_task (ZOOM_connection c, int which)
 158 {
 159     ZOOM_task task = (ZOOM_task) xmalloc (sizeof(*task));
 160
 161     task->next = c->tasks;
 162     c->tasks = task;
 163
 164     task->running = 0;
 165     task->which = which;
 166     clear_error (c);
 167     return task;
 168 }
 169
 170 void ZOOM_connection_remove_task (ZOOM_connection c)
 171 {
 172     ZOOM_task task = c->tasks;
 173
 174     if (task)
 175     {
 176         c->tasks = task->next;
 177         switch (task->which)
 178         {
 179         case ZOOM_TASK_SEARCH:
 180
 181             ZOOM_resultset_destroy (task->u.search.resultset);
 182             break;
 183         case ZOOM_TASK_RETRIEVE:
 184             ZOOM_resultset_destroy (task->u.retrieve.resultset);
 185             break;
 186         case ZOOM_TASK_CONNECT:
 187             break;
 188         case ZOOM_TASK_SCAN:
 189             ZOOM_scanset_destroy (task->u.scan.scan);
 190             break;
 191         case ZOOM_TASK_PACKAGE:
 192             ZOOM_package_destroy (task->u.package);
 193             break;
 194         default:
 195             assert (0);
 196         }
 197         xfree (task);
 198     }
 199 }
 200
 201 static int ZOOM_connection_exec_task (ZOOM_connection c);
 202
 203 void ZOOM_connection_remove_tasks (ZOOM_connection c)
 204 {
 205     while (c->tasks)
 206         ZOOM_connection_remove_task(c);
 207 }
 208
 209 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos);
 210
 211 ZOOM_API(ZOOM_connection)
 212 ZOOM_connection_create (ZOOM_options options)
 213 {
 214     ZOOM_connection c = (ZOOM_connection) xmalloc (sizeof(*c));
 215
 216     c->proto = PROTO_Z3950;
 217     c->cs = 0;
 218     c->mask = 0;
 219     c->reconnect_ok = 0;
 220     c->state = STATE_IDLE;
 221     c->addinfo = 0;
 222     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 223     c->buf_in = 0;
 224     c->len_in = 0;
 225     c->buf_out = 0;
 226     c->len_out = 0;
 227     c->resultsets = 0;
 228
 229     c->options = ZOOM_options_create_with_parent(options);
 230
 231     c->host_port = 0;
 232     c->path = 0;
 233     c->proxy = 0;
 234
 235     c->charset = c->lang = 0;
 236
 237     c->cookie_out = 0;
 238     c->cookie_in = 0;
 239     c->client_IP = 0;
 240     c->tasks = 0;
 241
 242     c->odr_in = odr_createmem (ODR_DECODE);
 243     c->odr_out = odr_createmem (ODR_ENCODE);
 244
 245     c->async = 0;
 246     c->support_named_resultsets = 0;
 247     c->last_event = ZOOM_EVENT_NONE;
 248
 249     c->m_queue_front = 0;
 250     c->m_queue_back = 0;
 251     return c;
 252 }
 253
 254 /* set database names. Take local databases (if set); otherwise
 255    take databases given in ZURL (if set); otherwise use Default */
 256 static char **set_DatabaseNames (ZOOM_connection con, ZOOM_options options,
 257                                  int *num)
 258 {
 259     char **databaseNames;
 260     const char *c;
 261     int no = 2;
 262     const char *cp = ZOOM_options_get (options, "databaseName");
 263
 264     if (!cp || !*cp)
 265     {
 266         if (strncmp (con->host_port, "unix:", 5) == 0)
 267             cp = strchr (con->host_port+5, ':');
 268         else
 269             cp = strchr (con->host_port, '/');
 270         if (cp)
 271             cp++;
 272     }
 273     if (cp)
 274     {
 275         c = cp;
 276         while ((c = strchr(c, '+')))
 277         {
 278             c++;
 279             no++;
 280         }
 281     }
 282     else
 283         cp = "Default";
 284     databaseNames = (char**)
 285         odr_malloc (con->odr_out, no * sizeof(*databaseNames));
 286     no = 0;
 287     while (*cp)
 288     {
 289         c = strchr (cp, '+');
 290         if (!c)
 291             c = cp + strlen(cp);
 292         else if (c == cp)
 293         {
 294             cp++;
 295             continue;
 296         }
 297         /* cp ptr to first char of db name, c is char
 298            following db name */
 299         databaseNames[no] = (char*) odr_malloc (con->odr_out, 1+c-cp);
 300         memcpy (databaseNames[no], cp, c-cp);
 301         databaseNames[no++][c-cp] = '\0';
 302         cp = c;
 303         if (*cp)
 304             cp++;
 305     }
 306     databaseNames[no] = NULL;
 307     *num = no;
 308     return databaseNames;
 309 }
 310
 311 ZOOM_API(ZOOM_connection)
 312 ZOOM_connection_new (const char *host, int portnum)
 313 {
 314     ZOOM_connection c = ZOOM_connection_create (0);
 315
 316     ZOOM_connection_connect (c, host, portnum);
 317     return c;
 318 }
 319
 320 ZOOM_API(void)
 321 ZOOM_connection_connect(ZOOM_connection c,
 322                         const char *host, int portnum)
 323 {
 324     const char *val;
 325     ZOOM_task task;
 326
 327     if (c->cs)
 328     {
 329         yaz_log (LOG_DEBUG, "reconnect");
 330         c->reconnect_ok = 1;
 331         return;
 332     }
 333     yaz_log(LOG_DEBUG, "connect");
 334     xfree (c->proxy);
 335     val = ZOOM_options_get (c->options, "proxy");
 336     if (val && *val)
 337         c->proxy = xstrdup (val);
 338     else
 339         c->proxy = 0;
 340
 341     xfree (c->charset);
 342     val = ZOOM_options_get (c->options, "charset");
 343     if (val && *val)
 344         c->charset = xstrdup (val);
 345     else
 346         c->charset = 0;
 347
 348     xfree (c->lang);
 349     val = ZOOM_options_get (c->options, "lang");
 350     if (val && *val)
 351         c->lang = xstrdup (val);
 352     else
 353         c->lang = 0;
 354
 355     xfree (c->host_port);
 356     if (portnum)
 357     {
 358         char hostn[128];
 359         sprintf (hostn, "%.80s:%d", host, portnum);
 360         c->host_port = xstrdup(hostn);
 361     }
 362     else
 363         c->host_port = xstrdup(host);
 364
 365     ZOOM_options_set(c->options, "host", c->host_port);
 366
 367     val = ZOOM_options_get (c->options, "cookie");
 368     if (val && *val)
 369         c->cookie_out = xstrdup (val);
 370
 371     val = ZOOM_options_get (c->options, "clientIP");
 372     if (val && *val)
 373         c->client_IP = xstrdup (val);
 374
 375     c->async = ZOOM_options_get_bool (c->options, "async", 0);
 376
 377     set_ZOOM_error(c, ZOOM_ERROR_NONE, 0);
 378
 379     task = ZOOM_connection_add_task (c, ZOOM_TASK_CONNECT);
 380
 381     if (!c->async)
 382     {
 383         while (ZOOM_event (1, &c))
 384             ;
 385     }
 386 }
 387
 388 ZOOM_API(ZOOM_query)
 389 ZOOM_query_create(void)
 390 {
 391     ZOOM_query s = (ZOOM_query) xmalloc (sizeof(*s));
 392
 393     s->refcount = 1;
 394     s->z_query = 0;
 395     s->sort_spec = 0;
 396     s->odr = odr_createmem (ODR_ENCODE);
 397     s->query_string = 0;
 398
 399     return s;
 400 }
 401
 402 ZOOM_API(void)
 403 ZOOM_query_destroy(ZOOM_query s)
 404 {
 405     if (!s)
 406         return;
 407
 408     (s->refcount)--;
 409     yaz_log (LOG_DEBUG, "ZOOM_query_destroy count=%d", s->refcount);
 410     if (s->refcount == 0)
 411     {
 412         odr_destroy (s->odr);
 413         xfree (s);
 414     }
 415 }
 416
 417 ZOOM_API(int)
 418 ZOOM_query_prefix(ZOOM_query s, const char *str)
 419 {
 420     s->query_string = odr_strdup(s->odr, str);
 421     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 422     s->z_query->which = Z_Query_type_1;
 423     s->z_query->u.type_1 =  p_query_rpn(s->odr, PROTO_Z3950, str);
 424     if (!s->z_query->u.type_1)
 425         return -1;
 426     return 0;
 427 }
 428
 429 ZOOM_API(int)
 430 ZOOM_query_cql(ZOOM_query s, const char *str)
 431 {
 432     Z_External *ext;
 433
 434     s->query_string = odr_strdup(s->odr, str);
 435
 436     ext = (Z_External *) odr_malloc(s->odr, sizeof(*ext));
 437     ext->direct_reference = odr_getoidbystr(s->odr, "1.2.840.10003.16.2");
 438     ext->indirect_reference = 0;
 439     ext->descriptor = 0;
 440     ext->which = Z_External_CQL;
 441     ext->u.cql = s->query_string;
 442
 443     s->z_query = (Z_Query *) odr_malloc (s->odr, sizeof(*s->z_query));
 444     s->z_query->which = Z_Query_type_104;
 445     s->z_query->u.type_104 =  ext;
 446
 447     return 0;
 448 }
 449
 450 ZOOM_API(int)
 451 ZOOM_query_sortby(ZOOM_query s, const char *criteria)
 452 {
 453     s->sort_spec = yaz_sort_spec (s->odr, criteria);
 454     if (!s->sort_spec)
 455         return -1;
 456     return 0;
 457 }
 458
 459 static zoom_ret do_write(ZOOM_connection c);
 460
 461 ZOOM_API(void)
 462 ZOOM_connection_destroy(ZOOM_connection c)
 463 {
 464     ZOOM_resultset r;
 465     if (!c)
 466         return;
 467     if (c->cs)
 468         cs_close (c->cs);
 469     for (r = c->resultsets; r; r = r->next)
 470         r->connection = 0;
 471
 472     xfree (c->buf_in);
 473     xfree (c->addinfo);
 474     odr_destroy (c->odr_in);
 475     odr_destroy (c->odr_out);
 476     ZOOM_options_destroy (c->options);
 477     ZOOM_connection_remove_tasks (c);
 478     xfree (c->host_port);
 479     xfree (c->path);
 480     xfree (c->proxy);
 481     xfree (c->charset);
 482     xfree (c->lang);
 483     xfree (c->cookie_out);
 484     xfree (c->cookie_in);
 485     xfree (c->client_IP);
 486     xfree (c);
 487 }
 488
 489 void ZOOM_resultset_addref (ZOOM_resultset r)
 490 {
 491     if (r)
 492     {
 493         (r->refcount)++;
 494         yaz_log (LOG_DEBUG, "ZOOM_resultset_addref r=%p count=%d",
 495                  r, r->refcount);
 496     }
 497 }
 498 ZOOM_resultset ZOOM_resultset_create ()
 499 {
 500     ZOOM_resultset r = (ZOOM_resultset) xmalloc (sizeof(*r));
 501
 502     yaz_log (LOG_DEBUG, "ZOOM_resultset_create r = %p", r);
 503     r->refcount = 1;
 504     r->size = 0;
 505     r->odr = odr_createmem (ODR_ENCODE);
 506     r->start = 0;
 507     r->piggyback = 1;
 508     r->setname = 0;
 509     r->schema = 0;
 510     r->count = 0;
 511     r->step = 0;
 512     r->record_cache = 0;
 513     r->r_sort_spec = 0;
 514     r->query = 0;
 515     r->connection = 0;
 516     r->next = 0;
 517     return r;
 518 }
 519
 520 ZOOM_API(ZOOM_resultset)
 521 ZOOM_connection_search_pqf(ZOOM_connection c, const char *q)
 522 {
 523     ZOOM_resultset r;
 524     ZOOM_query s = ZOOM_query_create();
 525
 526     ZOOM_query_prefix (s, q);
 527
 528     r = ZOOM_connection_search (c, s);
 529     ZOOM_query_destroy (s);
 530     return r;
 531 }
 532
 533 ZOOM_API(ZOOM_resultset)
 534 ZOOM_connection_search(ZOOM_connection c, ZOOM_query q)
 535 {
 536     ZOOM_resultset r = ZOOM_resultset_create ();
 537     ZOOM_task task;
 538     const char *cp;
 539
 540     r->r_sort_spec = q->sort_spec;
 541     r->query = q;
 542
 543     r->options = ZOOM_options_create_with_parent(c->options);
 544
 545     r->start = ZOOM_options_get_int(r->options, "start", 0);
 546     r->count = ZOOM_options_get_int(r->options, "count", 0);
 547     r->step = ZOOM_options_get_int(r->options, "step", 0);
 548     r->piggyback = ZOOM_options_get_bool (r->options, "piggyback", 1);
 549     cp = ZOOM_options_get (r->options, "setname");
 550     if (cp)
 551         r->setname = xstrdup(cp);
 552     cp = ZOOM_options_get (r->options, "schema");
 553     if (cp)
 554         r->schema = xstrdup(cp);
 555
 556     r->connection = c;
 557
 558     r->next = c->resultsets;
 559     c->resultsets = r;
 560
 561     if (c->host_port && c->proto == PROTO_HTTP)
 562     {
 563         if (!c->cs)
 564         {
 565             yaz_log(LOG_DEBUG, "NO COMSTACK");
 566             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 567         }
 568         else
 569         {
 570             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 571             c->reconnect_ok = 1;
 572         }
 573     }
 574
 575     task = ZOOM_connection_add_task (c, ZOOM_TASK_SEARCH);
 576     task->u.search.resultset = r;
 577     ZOOM_resultset_addref (r);
 578
 579     (q->refcount)++;
 580
 581     if (!c->async)
 582     {
 583         while (ZOOM_event (1, &c))
 584             ;
 585     }
 586     return r;
 587 }
 588
 589 ZOOM_API(void)
 590 ZOOM_resultset_destroy(ZOOM_resultset r)
 591 {
 592     if (!r)
 593         return;
 594     (r->refcount)--;
 595     yaz_log (LOG_DEBUG, "ZOOM_resultset_destroy r = %p count=%d",
 596              r, r->refcount);
 597     if (r->refcount == 0)
 598     {
 599         ZOOM_record_cache rc;
 600
 601         for (rc = r->record_cache; rc; rc = rc->next)
 602         {
 603             if (rc->rec.wrbuf_marc)
 604                 wrbuf_free (rc->rec.wrbuf_marc, 1);
 605             if (rc->rec.wrbuf_iconv)
 606                 wrbuf_free (rc->rec.wrbuf_iconv, 1);
 607             if (rc->rec.wrbuf_opac)
 608                 wrbuf_free (rc->rec.wrbuf_opac, 1);
 609         }
 610         if (r->connection)
 611         {
 612             /* remove ourselves from the resultsets in connection */
 613             ZOOM_resultset *rp = &r->connection->resultsets;
 614             while (1)
 615             {
 616                 assert (*rp);   /* we must be in this list!! */
 617                 if (*rp == r)
 618                 {   /* OK, we're here - take us out of it */
 619                     *rp = (*rp)->next;
 620                     break;
 621                 }
 622                 rp = &(*rp)->next;
 623             }
 624         }
 625         ZOOM_query_destroy (r->query);
 626         ZOOM_options_destroy (r->options);
 627         odr_destroy (r->odr);
 628         xfree (r->setname);
 629         xfree (r->schema);
 630         xfree (r);
 631     }
 632 }
 633
 634 ZOOM_API(size_t)
 635 ZOOM_resultset_size (ZOOM_resultset r)
 636 {
 637     return r->size;
 638 }
 639
 640 static void do_close (ZOOM_connection c)
 641 {
 642     if (c->cs)
 643         cs_close(c->cs);
 644     c->cs = 0;
 645     c->mask = 0;
 646     c->state = STATE_IDLE;
 647 }
 648
 649 static void ZOOM_resultset_retrieve (ZOOM_resultset r,
 650                                      int force_sync, int start, int count)
 651 {
 652     ZOOM_task task;
 653     ZOOM_connection c;
 654     const char *cp;
 655
 656     if (!r)
 657         return;
 658     c = r->connection;
 659     if (!c)
 660         return;
 661
 662     if (c->host_port && c->proto == PROTO_HTTP)
 663     {
 664         if (!c->cs)
 665         {
 666             yaz_log(LOG_DEBUG, "NO COMSTACK");
 667             ZOOM_connection_add_task(c, ZOOM_TASK_CONNECT);
 668         }
 669         else
 670         {
 671             yaz_log(LOG_DEBUG, "PREPARE FOR RECONNECT");
 672             c->reconnect_ok = 1;
 673         }
 674     }
 675     task = ZOOM_connection_add_task (c, ZOOM_TASK_RETRIEVE);
 676     task->u.retrieve.resultset = r;
 677     task->u.retrieve.start = start;
 678     task->u.retrieve.count = count;
 679
 680     cp = ZOOM_options_get (r->options, "schema");
 681     if (cp)
 682     {
 683         if (!r->schema || strcmp(r->schema, cp))
 684         {
 685             xfree(r->schema);
 686             r->schema = xstrdup(cp);
 687         }
 688     }
 689
 690     ZOOM_resultset_addref (r);
 691
 692     if (!r->connection->async || force_sync)
 693         while (r->connection && ZOOM_event (1, &r->connection))
 694             ;
 695 }
 696
 697 ZOOM_API(void)
 698 ZOOM_resultset_records (ZOOM_resultset r, ZOOM_record *recs,
 699                         size_t start, size_t count)
 700 {
 701     int force_present = 0;
 702
 703     if (!r)
 704         return ;
 705     if (count && recs)
 706         force_present = 1;
 707     ZOOM_resultset_retrieve (r, force_present, start, count);
 708     if (force_present)
 709     {
 710         size_t i;
 711         for (i = 0; i< count; i++)
 712             recs[i] = ZOOM_resultset_record_immediate (r, i+start);
 713     }
 714 }
 715
 716 static zoom_ret do_connect (ZOOM_connection c)
 717 {
 718     void *add;
 719     const char *effective_host;
 720
 721     if (c->proxy)
 722         effective_host = c->proxy;
 723     else
 724         effective_host = c->host_port;
 725
 726     yaz_log (LOG_DEBUG, "do_connect host=%s", effective_host);
 727
 728     assert (!c->cs);
 729     c->cs = cs_create_host (effective_host, 0, &add);
 730
 731     if (c->cs && c->cs->protocol == PROTO_HTTP)
 732     {
 733 #if HAVE_XML2
 734         const char *path = 0;
 735
 736         c->proto = PROTO_HTTP;
 737         cs_get_host_args(c->host_port, &path);
 738         xfree(c->path);
 739         c->path = xmalloc(strlen(path)+2);
 740         c->path[0] = '/';
 741         strcpy (c->path+1, path);
 742 #else
 743         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_PROTOCOL, "SRW");
 744         do_close(c);
 745         return zoom_complete;
 746 #endif
 747     }
 748     if (c->cs)
 749     {
 750         int ret = cs_connect (c->cs, add);
 751         if (ret == 0)
 752         {
 753             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_CONNECT);
 754             ZOOM_connection_put_event(c, event);
 755             if (c->proto == PROTO_Z3950)
 756                 ZOOM_connection_send_init(c);
 757             else
 758             {
 759                 /* no init request for SRW .. */
 760                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
 761                 ZOOM_connection_remove_task (c);
 762                 c->mask = 0;
 763                 ZOOM_connection_exec_task (c);
 764             }
 765             c->state = STATE_ESTABLISHED;
 766             return zoom_pending;
 767         }
 768         else if (ret > 0)
 769         {
 770             c->state = STATE_CONNECTING;
 771             c->mask = ZOOM_SELECT_EXCEPT;
 772             if (c->cs->io_pending & CS_WANT_WRITE)
 773                 c->mask += ZOOM_SELECT_WRITE;
 774             if (c->cs->io_pending & CS_WANT_READ)
 775                 c->mask += ZOOM_SELECT_READ;
 776             return zoom_pending;
 777         }
 778     }
 779     c->state = STATE_IDLE;
 780     set_ZOOM_error(c, ZOOM_ERROR_CONNECT, effective_host);
 781     return zoom_complete;
 782 }
 783
 784 int z3950_connection_socket(ZOOM_connection c)
 785 {
 786     if (c->cs)
 787         return cs_fileno(c->cs);
 788     return -1;
 789 }
 790
 791 int z3950_connection_mask(ZOOM_connection c)
 792 {
 793     if (c->cs)
 794         return c->mask;
 795     return 0;
 796 }
 797
 798 static void otherInfo_attach (ZOOM_connection c, Z_APDU *a, ODR out)
 799 {
 800     int i;
 801     for (i = 0; i<200; i++)
 802     {
 803         size_t len;
 804         Z_OtherInformation **oi;
 805         char buf[80];
 806         const char *val;
 807         const char *cp;
 808         int oidval;
 809
 810         sprintf (buf, "otherInfo%d", i);
 811         val = ZOOM_options_get (c->options, buf);
 812         if (!val)
 813             break;
 814         cp = strchr (val, ':');
 815         if (!cp)
 816             continue;
 817         len = cp - val;
 818         if (len >= sizeof(buf))
 819             len = sizeof(buf)-1;
 820         memcpy (buf, val, len);
 821         buf[len] = '\0';
 822         oidval = oid_getvalbyname (buf);
 823         if (oidval == VAL_NONE)
 824             continue;
 825
 826         yaz_oi_APDU(a, &oi);
 827         yaz_oi_set_string_oidval(oi, out, oidval, 1, cp+1);
 828     }
 829 }
 830
 831 static int encode_APDU(ZOOM_connection c, Z_APDU *a, ODR out)
 832 {
 833     assert (a);
 834     if (c->cookie_out)
 835     {
 836         Z_OtherInformation **oi;
 837         yaz_oi_APDU(a, &oi);
 838         yaz_oi_set_string_oidval(oi, out, VAL_COOKIE, 1, c->cookie_out);
 839     }
 840     if (c->client_IP)
 841     {
 842         Z_OtherInformation **oi;
 843         yaz_oi_APDU(a, &oi);
 844         yaz_oi_set_string_oidval(oi, out, VAL_CLIENT_IP, 1, c->client_IP);
 845     }
 846     otherInfo_attach (c, a, out);
 847     if (!z_APDU(out, &a, 0, 0))
 848     {
 849         FILE *outf = fopen("/tmp/apdu.txt", "a");
 850         if (a && outf)
 851         {
 852             ODR odr_pr = odr_createmem(ODR_PRINT);
 853             fprintf (outf, "a=%p\n", a);
 854             odr_setprint(odr_pr, outf);
 855             z_APDU(odr_pr, &a, 0, 0);
 856             odr_destroy(odr_pr);
 857         }
 858         yaz_log (LOG_DEBUG, "encoding failed");
 859         set_ZOOM_error(c, ZOOM_ERROR_ENCODE, 0);
 860         odr_reset(out);
 861         return -1;
 862     }
 863
 864     return 0;
 865 }
 866
 867 static zoom_ret send_APDU (ZOOM_connection c, Z_APDU *a)
 868 {
 869     ZOOM_Event event;
 870     assert (a);
 871     if (encode_APDU(c, a, c->odr_out))
 872         return zoom_complete;
 873     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
 874     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
 875     ZOOM_connection_put_event (c, event);
 876     odr_reset(c->odr_out);
 877     return do_write (c);
 878 }
 879
 880 /* returns 1 if PDU was sent OK (still pending )
 881            0 if PDU was not sent OK (nothing to wait for)
 882 */
 883
 884 static zoom_ret ZOOM_connection_send_init (ZOOM_connection c)
 885 {
 886     const char *impname;
 887     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_initRequest);
 888     Z_InitRequest *ireq = apdu->u.initRequest;
 889     Z_IdAuthentication *auth = (Z_IdAuthentication *)
 890         odr_malloc(c->odr_out, sizeof(*auth));
 891     const char *auth_groupId = ZOOM_options_get (c->options, "group");
 892     const char *auth_userId = ZOOM_options_get (c->options, "user");
 893     const char *auth_password = ZOOM_options_get (c->options, "pass");
 894
 895     ODR_MASK_SET(ireq->options, Z_Options_search);
 896     ODR_MASK_SET(ireq->options, Z_Options_present);
 897     ODR_MASK_SET(ireq->options, Z_Options_scan);
 898     ODR_MASK_SET(ireq->options, Z_Options_sort);
 899     ODR_MASK_SET(ireq->options, Z_Options_extendedServices);
 900     ODR_MASK_SET(ireq->options, Z_Options_namedResultSets);
 901
 902     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_1);
 903     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_2);
 904     ODR_MASK_SET(ireq->protocolVersion, Z_ProtocolVersion_3);
 905
 906     impname = ZOOM_options_get (c->options, "implementationName");
 907     ireq->implementationName =
 908         (char *) odr_malloc (c->odr_out, 15 + (impname ? strlen(impname) : 0));
 909     strcpy (ireq->implementationName, "");
 910     if (impname)
 911     {
 912         strcat (ireq->implementationName, impname);
 913         strcat (ireq->implementationName, "/");
 914     }
 915     strcat (ireq->implementationName, "ZOOM-C/YAZ");
 916
 917     *ireq->maximumRecordSize =
 918         ZOOM_options_get_int (c->options, "maximumRecordSize", 1024*1024);
 919     *ireq->preferredMessageSize =
 920         ZOOM_options_get_int (c->options, "preferredMessageSize", 1024*1024);
 921
 922     if (auth_groupId || auth_password)
 923     {
 924         Z_IdPass *pass = (Z_IdPass *) odr_malloc(c->odr_out, sizeof(*pass));
 925         int i = 0;
 926         pass->groupId = 0;
 927         if (auth_groupId && *auth_groupId)
 928         {
 929             pass->groupId = (char *)
 930                 odr_malloc(c->odr_out, strlen(auth_groupId)+1);
 931             strcpy(pass->groupId, auth_groupId);
 932             i++;
 933         }
 934         pass->userId = 0;
 935         if (auth_userId && *auth_userId)
 936         {
 937             pass->userId = (char *)
 938                 odr_malloc(c->odr_out, strlen(auth_userId)+1);
 939             strcpy(pass->userId, auth_userId);
 940             i++;
 941         }
 942         pass->password = 0;
 943         if (auth_password && *auth_password)
 944         {
 945             pass->password = (char *)
 946                 odr_malloc(c->odr_out, strlen(auth_password)+1);
 947             strcpy(pass->password, auth_password);
 948             i++;
 949         }
 950         if (i)
 951         {
 952             auth->which = Z_IdAuthentication_idPass;
 953             auth->u.idPass = pass;
 954             ireq->idAuthentication = auth;
 955         }
 956     }
 957     else if (auth_userId)
 958     {
 959         auth->which = Z_IdAuthentication_open;
 960         auth->u.open = (char *)
 961             odr_malloc(c->odr_out, strlen(auth_userId)+1);
 962         strcpy(auth->u.open, auth_userId);
 963         ireq->idAuthentication = auth;
 964     }
 965     if (c->proxy)
 966         yaz_oi_set_string_oidval(&ireq->otherInfo, c->odr_out,
 967                                  VAL_PROXY, 1, c->host_port);
 968     if (c->charset||c->lang)
 969     {
 970         Z_OtherInformation **oi;
 971         Z_OtherInformationUnit *oi_unit;
 972
 973         yaz_oi_APDU(apdu, &oi);
 974
 975         if ((oi_unit = yaz_oi_update(oi, c->odr_out, NULL, 0, 0)))
 976         {
 977             ODR_MASK_SET(ireq->options, Z_Options_negotiationModel);
 978
 979             oi_unit->which = Z_OtherInfo_externallyDefinedInfo;
 980             oi_unit->information.externallyDefinedInfo =
 981                 yaz_set_proposal_charneg
 982                 (c->odr_out,
 983                  (const char **)&c->charset, (c->charset) ? 1:0,
 984                  (const char **)&c->lang, (c->lang) ? 1:0, 1);
 985         }
 986     }
 987     assert (apdu);
 988     return send_APDU (c, apdu);
 989 }
 990
 991 #if HAVE_XML2
 992 static zoom_ret send_srw (ZOOM_connection c, Z_SRW_PDU *sr)
 993 {
 994     char ctype[50];
 995     Z_SOAP_Handler h[2] = {
 996         {"http://www.loc.gov/zing/srw/v1.0/", 0, (Z_SOAP_fun) yaz_srw_codec},
 997         {0, 0, 0}
 998     };
 999     ODR o = odr_createmem(ODR_ENCODE);
1000     int ret;
1001     Z_SOAP *p = odr_malloc(o, sizeof(*p));
1002     Z_GDU *gdu;
1003     ZOOM_Event event;
1004
1005     gdu = z_get_HTTP_Request(c->odr_out);
1006     gdu->u.HTTP_Request->path = c->path;
1007
1008     if (c->host_port)
1009     {
1010         const char *cp0 = strstr(c->host_port, "://");
1011         const char *cp1 = 0;
1012         if (cp0)
1013             cp0 = cp0+3;
1014         else
1015             cp0 = c->host_port;
1016
1017         cp1 = strchr(cp0, '/');
1018         if (!cp1)
1019             cp1 = cp0+strlen(cp0);
1020
1021         if (cp0 && cp1)
1022         {
1023             char *h = odr_malloc(c->odr_out, cp1 - cp0 + 1);
1024             memcpy (h, cp0, cp1 - cp0);
1025             h[cp1-cp0] = '\0';
1026             z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1027                               "host", h);
1028         }
1029     }
1030
1031     strcpy(ctype, "text/xml");
1032     if (c->charset && strlen(c->charset) < 20)
1033     {
1034         strcat(ctype, "; charset=");
1035         strcat(ctype, c->charset);
1036     }
1037     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1038                       "Content-Type", ctype);
1039     z_HTTP_header_add(c->odr_out, &gdu->u.HTTP_Request->headers,
1040                       "SOAPAction", "\"\"");
1041     p->which = Z_SOAP_generic;
1042     p->u.generic = odr_malloc(o, sizeof(*p->u.generic));
1043     p->u.generic->no = 0;
1044     p->u.generic->ns = 0;
1045     p->u.generic->p = sr;
1046     p->ns = "http://schemas.xmlsoap.org/soap/envelope/";
1047
1048     ret = z_soap_codec_enc(o, &p,
1049                            &gdu->u.HTTP_Request->content_buf,
1050                            &gdu->u.HTTP_Request->content_len, h,
1051                            c->charset);
1052
1053     if (!z_GDU(c->odr_out, &gdu, 0, 0))
1054         return zoom_complete;
1055     c->buf_out = odr_getbuf(c->odr_out, &c->len_out, 0);
1056
1057     odr_destroy(o);
1058
1059     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
1060     ZOOM_connection_put_event (c, event);
1061     odr_reset(c->odr_out);
1062     return do_write (c);
1063 }
1064 #endif
1065
1066 #if HAVE_XML2
1067 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1068 {
1069     int i;
1070     ZOOM_resultset resultset = 0;
1071     Z_SRW_PDU *sr = 0;
1072     const char *recordPacking = 0;
1073
1074     if (c->error)                  /* don't continue on error */
1075         return zoom_complete;
1076     assert (c->tasks);
1077     if (c->tasks->which == ZOOM_TASK_SEARCH)
1078     {
1079         resultset = c->tasks->u.search.resultset;
1080         resultset->setname = xstrdup ("default");
1081         ZOOM_options_set (resultset->options, "setname", resultset->setname);
1082     }
1083     else if(c->tasks->which == ZOOM_TASK_RETRIEVE)
1084     {
1085         resultset = c->tasks->u.retrieve.resultset;
1086
1087         resultset->start = c->tasks->u.retrieve.start;
1088         resultset->count = c->tasks->u.retrieve.count;
1089
1090         if (resultset->start >= resultset->size)
1091             return zoom_complete;
1092         if (resultset->start + resultset->count > resultset->size)
1093             resultset->count = resultset->size - resultset->start;
1094
1095         for (i = 0; i<resultset->count; i++)
1096         {
1097             ZOOM_record rec =
1098                 record_cache_lookup (resultset, i + resultset->start);
1099             if (!rec)
1100                 break;
1101         }
1102         if (i == resultset->count)
1103             return zoom_complete;
1104     }
1105     assert(resultset->query);
1106
1107     sr = yaz_srw_get(c->odr_out, Z_SRW_searchRetrieve_request);
1108
1109     if (resultset->query->z_query->which == Z_Query_type_104
1110         && resultset->query->z_query->u.type_104->which == Z_External_CQL)
1111     {
1112
1113         sr->u.request->query_type = Z_SRW_query_type_cql;
1114         sr->u.request->query.cql =resultset->query->z_query->u.type_104->u.cql;
1115     }
1116     else if (resultset->query->z_query->which == Z_Query_type_1 &&
1117              resultset->query->z_query->u.type_1)
1118     {
1119         sr->u.request->query_type = Z_SRW_query_type_pqf;
1120         sr->u.request->query.pqf = resultset->query->query_string;
1121     }
1122     else
1123     {
1124         set_ZOOM_error(c, ZOOM_ERROR_UNSUPPORTED_QUERY, 0);
1125         return zoom_complete;
1126     }
1127     sr->u.request->startRecord = odr_intdup (c->odr_out, resultset->start + 1);
1128     sr->u.request->maximumRecords = odr_intdup (
1129         c->odr_out, resultset->step>0 ? resultset->step : resultset->count);
1130     sr->u.request->recordSchema = resultset->schema;
1131
1132     recordPacking = ZOOM_resultset_option_get (resultset, "recordPacking");
1133
1134     if (recordPacking)
1135         sr->u.request->recordPacking = odr_strdup(c->odr_out, recordPacking);
1136
1137     return send_srw(c, sr);
1138 }
1139 #else
1140 static zoom_ret ZOOM_connection_srw_send_search(ZOOM_connection c)
1141 {
1142     return zoom_complete;
1143 }
1144 #endif
1145
1146 static zoom_ret ZOOM_connection_send_search (ZOOM_connection c)
1147 {
1148     ZOOM_resultset r;
1149     int lslb, ssub, mspn;
1150     const char *syntax;
1151     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_searchRequest);
1152     Z_SearchRequest *search_req = apdu->u.searchRequest;
1153     const char *elementSetName;
1154     const char *smallSetElementSetName;
1155     const char *mediumSetElementSetName;
1156
1157     assert (c->tasks);
1158     assert (c->tasks->which == ZOOM_TASK_SEARCH);
1159
1160     r = c->tasks->u.search.resultset;
1161
1162     elementSetName =
1163         ZOOM_options_get (r->options, "elementSetName");
1164     smallSetElementSetName  =
1165         ZOOM_options_get (r->options, "smallSetElementSetName");
1166     mediumSetElementSetName =
1167         ZOOM_options_get (r->options, "mediumSetElementSetName");
1168
1169     if (!smallSetElementSetName)
1170         smallSetElementSetName = elementSetName;
1171
1172     if (!mediumSetElementSetName)
1173         mediumSetElementSetName = elementSetName;
1174
1175     assert (r);
1176     assert (r->query);
1177
1178     /* prepare query for the search request */
1179     search_req->query = r->query->z_query;
1180
1181     search_req->databaseNames =
1182         set_DatabaseNames (c, r->options, &search_req->num_databaseNames);
1183
1184     /* get syntax (no need to provide unless piggyback is in effect) */
1185     syntax = ZOOM_options_get (r->options, "preferredRecordSyntax");
1186
1187     lslb = ZOOM_options_get_int (r->options, "largeSetLowerBound", -1);
1188     ssub = ZOOM_options_get_int (r->options, "smallSetUpperBound", -1);
1189     mspn = ZOOM_options_get_int (r->options, "mediumSetPresentNumber", -1);
1190     if (lslb != -1 && ssub != -1 && mspn != -1)
1191     {
1192         /* So're a Z39.50 expert? Let's hope you don't do sort */
1193         *search_req->largeSetLowerBound = lslb;
1194         *search_req->smallSetUpperBound = ssub;
1195         *search_req->mediumSetPresentNumber = mspn;
1196     }
1197     else if (r->start == 0 && r->count > 0
1198              && r->piggyback && !r->r_sort_spec && !r->schema)
1199     {
1200         /* Regular piggyback - do it unless we're going to do sort */
1201         *search_req->largeSetLowerBound = 2000000000;
1202         *search_req->smallSetUpperBound = 0;
1203         *search_req->mediumSetPresentNumber = r->step>0 ? r->step : r->count;
1204     }
1205     else
1206     {
1207         /* non-piggyback. Need not provide elementsets or syntaxes .. */
1208         smallSetElementSetName = 0;
1209         mediumSetElementSetName = 0;
1210         syntax = 0;
1211     }
1212     if (smallSetElementSetName && *smallSetElementSetName)
1213     {
1214         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1215             odr_malloc (c->odr_out, sizeof(*esn));
1216
1217         esn->which = Z_ElementSetNames_generic;
1218         esn->u.generic = odr_strdup (c->odr_out, smallSetElementSetName);
1219         search_req->smallSetElementSetNames = esn;
1220     }
1221     if (mediumSetElementSetName && *mediumSetElementSetName)
1222     {
1223         Z_ElementSetNames *esn = (Z_ElementSetNames *)
1224             odr_malloc (c->odr_out, sizeof(*esn));
1225
1226         esn->which = Z_ElementSetNames_generic;
1227         esn->u.generic = odr_strdup (c->odr_out, mediumSetElementSetName);
1228         search_req->mediumSetElementSetNames = esn;
1229     }
1230     if (syntax)
1231         search_req->preferredRecordSyntax =
1232             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1233
1234     if (!r->setname)
1235     {
1236         if (c->support_named_resultsets)
1237         {
1238             char setname[14];
1239             int ord;
1240             /* find the lowest unused ordinal so that we re-use
1241                result sets on the server. */
1242             for (ord = 1; ; ord++)
1243             {
1244                 ZOOM_resultset rp;
1245                 sprintf (setname, "%d", ord);
1246                 for (rp = c->resultsets; rp; rp = rp->next)
1247                     if (rp->setname && !strcmp (rp->setname, setname))
1248                         break;
1249                 if (!rp)
1250                     break;
1251             }
1252             r->setname = xstrdup (setname);
1253             yaz_log (LOG_DEBUG, "allocating set %s", r->setname);
1254         }
1255         else
1256             r->setname = xstrdup ("default");
1257         ZOOM_options_set (r->options, "setname", r->setname);
1258     }
1259     search_req->resultSetName = odr_strdup(c->odr_out, r->setname);
1260     /* send search request */
1261     return send_APDU (c, apdu);
1262 }
1263
1264 static void response_diag (ZOOM_connection c, Z_DiagRec *p)
1265 {
1266     int oclass;
1267     Z_DefaultDiagFormat *r;
1268     char *addinfo = 0;
1269
1270     xfree (c->addinfo);
1271     c->addinfo = 0;
1272     if (p->which != Z_DiagRec_defaultFormat)
1273     {
1274         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1275         return;
1276     }
1277     r = p->u.defaultFormat;
1278     switch (r->which)
1279     {
1280     case Z_DefaultDiagFormat_v2Addinfo:
1281         addinfo = r->u.v2Addinfo;
1282         break;
1283     case Z_DefaultDiagFormat_v3Addinfo:
1284         addinfo = r->u.v3Addinfo;
1285         break;
1286     }
1287     set_dset_error(c, *r->condition,
1288                    yaz_z3950oid_to_str(r->diagnosticSetId, &oclass),
1289                    addinfo, 0);
1290 }
1291
1292 ZOOM_API(ZOOM_record)
1293 ZOOM_record_clone (ZOOM_record srec)
1294 {
1295     char *buf;
1296     int size;
1297     ODR odr_enc;
1298     ZOOM_record nrec;
1299
1300     odr_enc = odr_createmem(ODR_ENCODE);
1301     if (!z_NamePlusRecord (odr_enc, &srec->npr, 0, 0))
1302         return 0;
1303     buf = odr_getbuf (odr_enc, &size, 0);
1304
1305     nrec = (ZOOM_record) xmalloc (sizeof(*nrec));
1306     nrec->odr = odr_createmem(ODR_DECODE);
1307     nrec->wrbuf_marc = 0;
1308     nrec->wrbuf_iconv = 0;
1309     nrec->wrbuf_opac = 0;
1310     odr_setbuf (nrec->odr, buf, size, 0);
1311     z_NamePlusRecord (nrec->odr, &nrec->npr, 0, 0);
1312
1313     odr_destroy (odr_enc);
1314     return nrec;
1315 }
1316
1317 ZOOM_API(ZOOM_record)
1318 ZOOM_resultset_record_immediate (ZOOM_resultset s,size_t pos)
1319 {
1320     return record_cache_lookup (s, pos);
1321 }
1322
1323 ZOOM_API(ZOOM_record)
1324 ZOOM_resultset_record (ZOOM_resultset r, size_t pos)
1325 {
1326     ZOOM_record rec = ZOOM_resultset_record_immediate(r, pos);
1327
1328     if (!rec)
1329     {
1330         ZOOM_resultset_retrieve (r, 1, pos, 1);
1331         rec = ZOOM_resultset_record_immediate (r, pos);
1332     }
1333     return rec;
1334 }
1335
1336 ZOOM_API(void)
1337 ZOOM_record_destroy (ZOOM_record rec)
1338 {
1339     if (!rec)
1340         return;
1341     if (rec->wrbuf_marc)
1342         wrbuf_free (rec->wrbuf_marc, 1);
1343     if (rec->wrbuf_iconv)
1344         wrbuf_free (rec->wrbuf_iconv, 1);
1345     if (rec->wrbuf_opac)
1346         wrbuf_free (rec->wrbuf_opac, 1);
1347     odr_destroy (rec->odr);
1348     xfree (rec);
1349 }
1350
1351 static const char *record_iconv_return(ZOOM_record rec, int *len,
1352                                        const char *buf, int sz,
1353                                        const char *record_charset)
1354 {
1355     char to[40];
1356     char from[40];
1357     yaz_iconv_t cd = 0;
1358
1359     *from = '\0';
1360     strcpy(to, "UTF-8");
1361     if (record_charset && *record_charset)
1362     {
1363         /* Use "from,to" or just "from" */
1364         const char *cp =strchr(record_charset, ',');
1365         int clen = strlen(record_charset);
1366         if (cp && cp[1])
1367         {
1368             strncpy( to, cp+1, sizeof(to)-1);
1369             to[sizeof(to)-1] = '\0';
1370             clen = cp - record_charset;
1371         }
1372         if (clen > sizeof(from)-1)
1373             clen = sizeof(from)-1;
1374
1375         if (clen)
1376             strncpy(from, record_charset, clen);
1377         from[clen] = '\0';
1378     }
1379
1380     if (*from && *to && (cd = yaz_iconv_open(to, from)))
1381     {
1382         char outbuf[12];
1383         size_t inbytesleft = sz;
1384         const char *inp = buf;
1385
1386         if (!rec->wrbuf_iconv)
1387             rec->wrbuf_iconv = wrbuf_alloc();
1388
1389         wrbuf_rewind(rec->wrbuf_iconv);
1390
1391         while (inbytesleft)
1392         {
1393             size_t outbytesleft = sizeof(outbuf);
1394             char *outp = outbuf;
1395             size_t r = yaz_iconv (cd, (char**) &inp,
1396                                   &inbytesleft,
1397                                   &outp, &outbytesleft);
1398             if (r == (size_t) (-1))
1399             {
1400                 int e = yaz_iconv_error(cd);
1401                 if (e != YAZ_ICONV_E2BIG)
1402                     break;
1403             }
1404             wrbuf_write(rec->wrbuf_iconv, outbuf, outp - outbuf);
1405         }
1406         wrbuf_puts(rec->wrbuf_iconv, "");
1407         buf = wrbuf_buf(rec->wrbuf_iconv);
1408         sz = wrbuf_len(rec->wrbuf_iconv);
1409         yaz_iconv_close(cd);
1410     }
1411     if (len)
1412         *len = sz;
1413     return buf;
1414 }
1415
1416 ZOOM_API(const char *)
1417 ZOOM_record_get (ZOOM_record rec, const char *type_spec, int *len)
1418 {
1419     char type[40];
1420     char charset[40];
1421     const char *cp;
1422     int i;
1423     Z_NamePlusRecord *npr;
1424
1425     if (len)
1426         *len = 0; /* default return */
1427
1428     if (!rec)
1429         return 0;
1430     npr = rec->npr;
1431     if (!npr)
1432         return 0;
1433
1434     cp = type_spec;
1435     for (i = 0; cp[i] && i < sizeof(type)-1; i++)
1436     {
1437         if (cp[i] == ';' || cp[i] == ' ')
1438             break;
1439         type[i] = cp[i];
1440     }
1441     type[i] = '\0';
1442     charset[0] = '\0';
1443     if (type_spec[i] == ';')
1444     {
1445         i++;
1446         while (type_spec[i] == ' ')
1447             i++;
1448         if (!strncmp(type_spec+i, "charset=", 8))
1449         {
1450             cp = type_spec+i+8;
1451             for (i = 0; cp[i] && i < sizeof(charset)-1; i++)
1452             {
1453                 if (cp[i] == ';' || cp[i] == ' ')
1454                     break;
1455                 charset[i] = cp[i];
1456             }
1457             charset[i] = '\0';
1458         }
1459     }
1460
1461     if (!strcmp (type, "database"))
1462     {
1463         if (len)
1464             *len = (npr->databaseName ? strlen(npr->databaseName) : 0);
1465         return npr->databaseName;
1466     }
1467     else if (!strcmp (type, "syntax"))
1468     {
1469         const char *desc = 0;
1470         if (npr->which == Z_NamePlusRecord_databaseRecord)
1471         {
1472             Z_External *r = (Z_External *) npr->u.databaseRecord;
1473             oident *ent = oid_getentbyoid(r->direct_reference);
1474             if (ent)
1475                 desc = ent->desc;
1476         }
1477         if (!desc)
1478             desc = "none";
1479         if (len)
1480             *len = strlen(desc);
1481         return desc;
1482     }
1483     else if (!strcmp (type, "render") &&
1484              npr->which == Z_NamePlusRecord_databaseRecord)
1485     {
1486         Z_External *r = (Z_External *) npr->u.databaseRecord;
1487         oident *ent = oid_getentbyoid(r->direct_reference);
1488
1489         /* render bibliographic record .. */
1490         if (r->which == Z_External_OPAC)
1491         {
1492             r = r->u.opac->bibliographicRecord;
1493             if (!r)
1494                 return 0;
1495             ent = oid_getentbyoid(r->direct_reference);
1496         }
1497         if (r->which == Z_External_sutrs)
1498             return record_iconv_return(rec, len,
1499                                        r->u.sutrs->buf, r->u.sutrs->len,
1500                                        charset);
1501         else if (r->which == Z_External_octet)
1502         {
1503             yaz_marc_t mt;
1504             switch (ent->value)
1505             {
1506             case VAL_SOIF:
1507             case VAL_HTML:
1508             case VAL_SUTRS:
1509                 break;
1510             case VAL_TEXT_XML:
1511             case VAL_APPLICATION_XML:
1512                 break;
1513             default:
1514                 if (!rec->wrbuf_marc)
1515                     rec->wrbuf_marc = wrbuf_alloc();
1516
1517                 mt = yaz_marc_create();
1518                 wrbuf_rewind (rec->wrbuf_marc);
1519                 if (yaz_marc_decode_wrbuf (
1520                         mt, (const char *) r->u.octet_aligned->buf,
1521                         r->u.octet_aligned->len,
1522                         rec->wrbuf_marc) > 0)
1523                 {
1524                     yaz_marc_destroy(mt);
1525                     return record_iconv_return(rec, len,
1526                                                wrbuf_buf(rec->wrbuf_marc),
1527                                                wrbuf_len(rec->wrbuf_marc),
1528                                                charset);
1529                 }
1530                 yaz_marc_destroy(mt);
1531             }
1532             return record_iconv_return(rec, len,
1533                                        (const char *) r->u.octet_aligned->buf,
1534                                        r->u.octet_aligned->len,
1535                                        charset);
1536         }
1537         else if (r->which == Z_External_grs1)
1538         {
1539             if (!rec->wrbuf_marc)
1540                 rec->wrbuf_marc = wrbuf_alloc();
1541             wrbuf_rewind (rec->wrbuf_marc);
1542             yaz_display_grs1(rec->wrbuf_marc, r->u.grs1, 0);
1543             return record_iconv_return(rec, len,
1544                                        wrbuf_buf(rec->wrbuf_marc),
1545                                        wrbuf_len(rec->wrbuf_marc),
1546                                        charset);
1547         }
1548         return 0;
1549     }
1550     else if (npr->which == Z_NamePlusRecord_databaseRecord &&
1551              (!strcmp (type, "xml") || !strcmp(type, "oai")))
1552     {
1553         Z_External *r = (Z_External *) npr->u.databaseRecord;
1554         oident *ent = oid_getentbyoid(r->direct_reference);
1555
1556         /* render bibliographic record .. */
1557         if (r->which == Z_External_OPAC)
1558         {
1559             r = r->u.opac->bibliographicRecord;
1560             if (!r)
1561                 return 0;
1562             ent = oid_getentbyoid(r->direct_reference);
1563         }
1564
1565         if (r->which == Z_External_sutrs)
1566             return record_iconv_return(rec, len,
1567                                        (const char *) r->u.sutrs->buf,
1568                                        r->u.sutrs->len,
1569                                        charset);
1570         else if (r->which == Z_External_octet)
1571         {
1572             yaz_marc_t mt;
1573             int marc_decode_type = YAZ_MARC_MARCXML;
1574
1575             if (!strcmp(type, "oai"))
1576                 marc_decode_type = YAZ_MARC_OAIMARC;
1577             switch (ent->value)
1578             {
1579             case VAL_SOIF:
1580             case VAL_HTML:
1581             case VAL_SUTRS:
1582                 break;
1583             case VAL_TEXT_XML:
1584             case VAL_APPLICATION_XML:
1585                 break;
1586             default:
1587                 if (!rec->wrbuf_marc)
1588                     rec->wrbuf_marc = wrbuf_alloc();
1589                 wrbuf_rewind (rec->wrbuf_marc);
1590                 mt = yaz_marc_create();
1591
1592                 yaz_marc_xml(mt, YAZ_MARC_MARCXML);
1593                 if (yaz_marc_decode_wrbuf (
1594                         mt, (const char *) r->u.octet_aligned->buf,
1595                         r->u.octet_aligned->len,
1596                         rec->wrbuf_marc) > 0)
1597                 {
1598                     yaz_marc_destroy(mt);
1599                     return record_iconv_return(rec, len,
1600                                                wrbuf_buf(rec->wrbuf_marc),
1601                                                wrbuf_len(rec->wrbuf_marc),
1602                                                charset);
1603                 }
1604                 yaz_marc_destroy(mt);
1605             }
1606             return record_iconv_return(rec, len,
1607                                        (const char *) r->u.octet_aligned->buf,
1608                                        r->u.octet_aligned->len,
1609                                        charset);
1610         }
1611         else if (r->which == Z_External_grs1)
1612         {
1613             if (len) *len = 5;
1614             return "GRS-1";
1615         }
1616         return 0;
1617     }
1618     else if (!strcmp (type, "raw"))
1619     {
1620         if (npr->which == Z_NamePlusRecord_databaseRecord)
1621         {
1622             Z_External *r = (Z_External *) npr->u.databaseRecord;
1623
1624             if (r->which == Z_External_sutrs)
1625             {
1626                 if (len) *len = r->u.sutrs->len;
1627                 return (const char *) r->u.sutrs->buf;
1628             }
1629             else if (r->which == Z_External_octet)
1630             {
1631                 if (len) *len = r->u.octet_aligned->len;
1632                 return (const char *) r->u.octet_aligned->buf;
1633             }
1634             else /* grs-1, explain, OPAC, ... */
1635             {
1636                 if (len) *len = -1;
1637                 return (const char *) npr->u.databaseRecord;
1638             }
1639         }
1640         return 0;
1641     }
1642     else if (!strcmp (type, "ext"))
1643     {
1644         if (npr->which == Z_NamePlusRecord_databaseRecord)
1645             return (const char *) npr->u.databaseRecord;
1646         return 0;
1647     }
1648     else if (npr->which == Z_NamePlusRecord_databaseRecord &&
1649              !strcmp (type, "opac"))
1650
1651     {
1652         Z_External *r = (Z_External *) npr->u.databaseRecord;
1653         if (r->which == Z_External_OPAC)
1654         {
1655             if (!rec->wrbuf_opac)
1656                 rec->wrbuf_opac = wrbuf_alloc();
1657             wrbuf_rewind (rec->wrbuf_opac);
1658             yaz_display_OPAC(rec->wrbuf_opac, r->u.opac, 0);
1659             return record_iconv_return(rec, len,
1660                                        wrbuf_buf(rec->wrbuf_opac),
1661                                        wrbuf_len(rec->wrbuf_opac),
1662                                        charset);
1663         }
1664     }
1665     return 0;
1666 }
1667
1668 static int strcmp_null(const char *v1, const char *v2)
1669 {
1670     if (!v1 && !v2)
1671         return 0;
1672     if (!v1 || !v2)
1673         return -1;
1674     return strcmp(v1, v2);
1675 }
1676
1677 static void record_cache_add (ZOOM_resultset r, Z_NamePlusRecord *npr,
1678                               int pos)
1679 {
1680     ZOOM_record_cache rc;
1681     const char *elementSetName =
1682         ZOOM_resultset_option_get (r, "elementSetName");
1683     const char *syntax =
1684         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1685
1686     ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_RECV_RECORD);
1687     ZOOM_connection_put_event(r->connection, event);
1688
1689     for (rc = r->record_cache; rc; rc = rc->next)
1690     {
1691         if (pos == rc->pos)
1692         {
1693             if (strcmp_null(r->schema, rc->schema))
1694                 continue;
1695             if (strcmp_null(elementSetName,rc->elementSetName))
1696                 continue;
1697             if (strcmp_null(syntax, rc->syntax))
1698                 continue;
1699             /* not destroying rc->npr (it's handled by nmem )*/
1700             rc->rec.npr = npr;
1701             /* keeping wrbuf_marc too */
1702             return;
1703         }
1704     }
1705     rc = (ZOOM_record_cache) odr_malloc (r->odr, sizeof(*rc));
1706     rc->rec.npr = npr;
1707     rc->rec.odr = 0;
1708     rc->rec.wrbuf_marc = 0;
1709     rc->rec.wrbuf_iconv = 0;
1710     rc->rec.wrbuf_opac = 0;
1711     if (elementSetName)
1712         rc->elementSetName = odr_strdup (r->odr, elementSetName);
1713     else
1714         rc->elementSetName = 0;
1715
1716     if (syntax)
1717         rc->syntax = odr_strdup (r->odr, syntax);
1718     else
1719         rc->syntax = 0;
1720
1721     if (r->schema)
1722         rc->schema = odr_strdup (r->odr, r->schema);
1723     else
1724         rc->schema = 0;
1725
1726     rc->pos = pos;
1727     rc->next = r->record_cache;
1728     r->record_cache = rc;
1729 }
1730
1731 static ZOOM_record record_cache_lookup (ZOOM_resultset r, int pos)
1732 {
1733     ZOOM_record_cache rc;
1734     const char *elementSetName =
1735         ZOOM_resultset_option_get (r, "elementSetName");
1736     const char *syntax =
1737         ZOOM_resultset_option_get (r, "preferredRecordSyntax");
1738
1739     for (rc = r->record_cache; rc; rc = rc->next)
1740     {
1741         if (pos == rc->pos)
1742         {
1743             if (strcmp_null(r->schema, rc->schema))
1744                 continue;
1745             if (strcmp_null(elementSetName,rc->elementSetName))
1746                 continue;
1747             if (strcmp_null(syntax, rc->syntax))
1748                 continue;
1749             return &rc->rec;
1750         }
1751     }
1752     return 0;
1753 }
1754
1755 static void handle_records (ZOOM_connection c, Z_Records *sr,
1756                             int present_phase)
1757 {
1758     ZOOM_resultset resultset;
1759
1760     if (!c->tasks)
1761         return ;
1762     switch (c->tasks->which)
1763     {
1764     case ZOOM_TASK_SEARCH:
1765         resultset = c->tasks->u.search.resultset;
1766         break;
1767     case ZOOM_TASK_RETRIEVE:
1768         resultset = c->tasks->u.retrieve.resultset;
1769         break;
1770     default:
1771         return;
1772     }
1773     if (sr && sr->which == Z_Records_NSD)
1774     {
1775         Z_DiagRec dr, *dr_p = &dr;
1776         dr.which = Z_DiagRec_defaultFormat;
1777         dr.u.defaultFormat = sr->u.nonSurrogateDiagnostic;
1778
1779         response_diag (c, dr_p);
1780     }
1781     else if (sr && sr->which == Z_Records_multipleNSD)
1782     {
1783         if (sr->u.multipleNonSurDiagnostics->num_diagRecs >= 1)
1784             response_diag(c, sr->u.multipleNonSurDiagnostics->diagRecs[0]);
1785         else
1786             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1787     }
1788     else
1789     {
1790         if (resultset->count + resultset->start > resultset->size)
1791             resultset->count = resultset->size - resultset->start;
1792         if (resultset->count < 0)
1793             resultset->count = 0;
1794         if (sr && sr->which == Z_Records_DBOSD)
1795         {
1796             int i;
1797             NMEM nmem = odr_extract_mem (c->odr_in);
1798             Z_NamePlusRecordList *p =
1799                 sr->u.databaseOrSurDiagnostics;
1800             for (i = 0; i<p->num_records; i++)
1801             {
1802                 record_cache_add (resultset, p->records[i],
1803                                   i+ resultset->start);
1804             }
1805             /* transfer our response to search_nmem .. we need it later */
1806             nmem_transfer (resultset->odr->mem, nmem);
1807             nmem_destroy (nmem);
1808             if (present_phase && p->num_records == 0)
1809             {
1810                 /* present response and we didn't get any records! */
1811                 set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1812             }
1813         }
1814         else if (present_phase)
1815         {
1816             /* present response and we didn't get any records! */
1817             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
1818         }
1819     }
1820 }
1821
1822 static void handle_present_response (ZOOM_connection c, Z_PresentResponse *pr)
1823 {
1824     handle_records (c, pr->records, 1);
1825 }
1826
1827 static void handle_search_response (ZOOM_connection c, Z_SearchResponse *sr)
1828 {
1829     ZOOM_resultset resultset;
1830     ZOOM_Event event;
1831
1832     yaz_log (LOG_DEBUG, "got search response");
1833
1834     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1835         return ;
1836
1837     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
1838     ZOOM_connection_put_event(c, event);
1839
1840     resultset = c->tasks->u.search.resultset;
1841
1842     resultset->size = *sr->resultCount;
1843     handle_records (c, sr->records, 0);
1844 }
1845
1846 static void sort_response (ZOOM_connection c, Z_SortResponse *res)
1847 {
1848     if (res->diagnostics && res->num_diagnostics > 0)
1849         response_diag (c, res->diagnostics[0]);
1850 }
1851
1852 static int scan_response (ZOOM_connection c, Z_ScanResponse *res)
1853 {
1854     NMEM nmem = odr_extract_mem (c->odr_in);
1855     ZOOM_scanset scan;
1856
1857     if (!c->tasks || c->tasks->which != ZOOM_TASK_SCAN)
1858         return 0;
1859     scan = c->tasks->u.scan.scan;
1860
1861     if (res->entries && res->entries->nonsurrogateDiagnostics)
1862         response_diag(c, res->entries->nonsurrogateDiagnostics[0]);
1863     scan->scan_response = res;
1864     nmem_transfer (scan->odr->mem, nmem);
1865     if (res->stepSize)
1866         ZOOM_options_set_int (scan->options, "stepSize", *res->stepSize);
1867     if (res->positionOfTerm)
1868         ZOOM_options_set_int (scan->options, "position", *res->positionOfTerm);
1869     if (res->scanStatus)
1870         ZOOM_options_set_int (scan->options, "scanStatus", *res->scanStatus);
1871     if (res->numberOfEntriesReturned)
1872         ZOOM_options_set_int (scan->options, "number",
1873                               *res->numberOfEntriesReturned);
1874     nmem_destroy (nmem);
1875     return 1;
1876 }
1877
1878 static zoom_ret send_sort (ZOOM_connection c)
1879 {
1880     ZOOM_resultset  resultset;
1881
1882     if (!c->tasks || c->tasks->which != ZOOM_TASK_SEARCH)
1883         return zoom_complete;
1884
1885     resultset = c->tasks->u.search.resultset;
1886
1887     if (c->error)
1888     {
1889         resultset->r_sort_spec = 0;
1890         return zoom_complete;
1891     }
1892     if (resultset->r_sort_spec)
1893     {
1894         Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_sortRequest);
1895         Z_SortRequest *req = apdu->u.sortRequest;
1896
1897         req->num_inputResultSetNames = 1;
1898         req->inputResultSetNames = (Z_InternationalString **)
1899             odr_malloc (c->odr_out, sizeof(*req->inputResultSetNames));
1900         req->inputResultSetNames[0] =
1901             odr_strdup (c->odr_out, resultset->setname);
1902         req->sortedResultSetName = odr_strdup (c->odr_out, resultset->setname);
1903         req->sortSequence = resultset->r_sort_spec;
1904         resultset->r_sort_spec = 0;
1905         return send_APDU (c, apdu);
1906     }
1907     return zoom_complete;
1908 }
1909
1910 static zoom_ret send_present (ZOOM_connection c)
1911 {
1912     Z_APDU *apdu = 0;
1913     Z_PresentRequest *req = 0;
1914     int i = 0;
1915     const char *syntax = 0;
1916     const char *elementSetName = 0;
1917     ZOOM_resultset  resultset;
1918
1919     if (!c->tasks)
1920         return zoom_complete;
1921
1922     switch (c->tasks->which)
1923     {
1924     case ZOOM_TASK_SEARCH:
1925         resultset = c->tasks->u.search.resultset;
1926         break;
1927     case ZOOM_TASK_RETRIEVE:
1928         resultset = c->tasks->u.retrieve.resultset;
1929         resultset->start = c->tasks->u.retrieve.start;
1930         resultset->count = c->tasks->u.retrieve.count;
1931
1932         if (resultset->start >= resultset->size)
1933             return zoom_complete;
1934         if (resultset->start + resultset->count > resultset->size)
1935             resultset->count = resultset->size - resultset->start;
1936         break;
1937     default:
1938         return zoom_complete;
1939     }
1940
1941     syntax = ZOOM_resultset_option_get (resultset, "preferredRecordSyntax");
1942     elementSetName = ZOOM_resultset_option_get (resultset, "elementSetName");
1943
1944     if (c->error)                  /* don't continue on error */
1945         return zoom_complete;
1946     if (resultset->start < 0)
1947         return zoom_complete;
1948     for (i = 0; i<resultset->count; i++)
1949     {
1950         ZOOM_record rec =
1951             record_cache_lookup (resultset, i + resultset->start);
1952         if (!rec)
1953             break;
1954     }
1955     if (i == resultset->count)
1956         return zoom_complete;
1957
1958     apdu = zget_APDU(c->odr_out, Z_APDU_presentRequest);
1959     req = apdu->u.presentRequest;
1960
1961     resultset->start += i;
1962     resultset->count -= i;
1963     *req->resultSetStartPoint = resultset->start + 1;
1964     *req->numberOfRecordsRequested = resultset->step>0 ?
1965         resultset->step : resultset->count;
1966     assert (*req->numberOfRecordsRequested > 0);
1967
1968     if (syntax && *syntax)
1969         req->preferredRecordSyntax =
1970             yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, syntax);
1971
1972     if (resultset->schema && *resultset->schema)
1973     {
1974         Z_RecordComposition *compo = (Z_RecordComposition *)
1975             odr_malloc (c->odr_out, sizeof(*compo));
1976
1977         req->recordComposition = compo;
1978         compo->which = Z_RecordComp_complex;
1979         compo->u.complex = (Z_CompSpec *)
1980             odr_malloc(c->odr_out, sizeof(*compo->u.complex));
1981         compo->u.complex->selectAlternativeSyntax = (bool_t *)
1982             odr_malloc(c->odr_out, sizeof(bool_t));
1983         *compo->u.complex->selectAlternativeSyntax = 0;
1984
1985         compo->u.complex->generic = (Z_Specification *)
1986             odr_malloc(c->odr_out, sizeof(*compo->u.complex->generic));
1987
1988         compo->u.complex->generic->which = Z_Schema_oid;
1989         compo->u.complex->generic->schema.oid = (Odr_oid *)
1990             yaz_str_to_z3950oid (c->odr_out, CLASS_SCHEMA, resultset->schema);
1991
1992         if (!compo->u.complex->generic->schema.oid)
1993         {
1994             /* OID wasn't a schema! Try record syntax instead. */
1995
1996             compo->u.complex->generic->schema.oid = (Odr_oid *)
1997                 yaz_str_to_z3950oid (c->odr_out, CLASS_RECSYN, resultset->schema);
1998         }
1999         if (elementSetName && *elementSetName)
2000         {
2001             compo->u.complex->generic->elementSpec = (Z_ElementSpec *)
2002                 odr_malloc(c->odr_out, sizeof(Z_ElementSpec));
2003             compo->u.complex->generic->elementSpec->which =
2004                 Z_ElementSpec_elementSetName;
2005             compo->u.complex->generic->elementSpec->u.elementSetName =
2006                 odr_strdup (c->odr_out, elementSetName);
2007         }
2008         else
2009             compo->u.complex->generic->elementSpec = 0;
2010         compo->u.complex->num_dbSpecific = 0;
2011         compo->u.complex->dbSpecific = 0;
2012         compo->u.complex->num_recordSyntax = 0;
2013         compo->u.complex->recordSyntax = 0;
2014     }
2015     else if (elementSetName && *elementSetName)
2016     {
2017         Z_ElementSetNames *esn = (Z_ElementSetNames *)
2018             odr_malloc (c->odr_out, sizeof(*esn));
2019         Z_RecordComposition *compo = (Z_RecordComposition *)
2020             odr_malloc (c->odr_out, sizeof(*compo));
2021
2022         esn->which = Z_ElementSetNames_generic;
2023         esn->u.generic = odr_strdup (c->odr_out, elementSetName);
2024         compo->which = Z_RecordComp_simple;
2025         compo->u.simple = esn;
2026         req->recordComposition = compo;
2027     }
2028     req->resultSetId = odr_strdup(c->odr_out, resultset->setname);
2029     return send_APDU (c, apdu);
2030 }
2031
2032 ZOOM_API(ZOOM_scanset)
2033 ZOOM_connection_scan (ZOOM_connection c, const char *start)
2034 {
2035     ZOOM_scanset scan = (ZOOM_scanset) xmalloc (sizeof(*scan));
2036
2037     scan->connection = c;
2038     scan->odr = odr_createmem (ODR_DECODE);
2039     scan->options = ZOOM_options_create_with_parent (c->options);
2040     scan->refcount = 1;
2041     scan->scan_response = 0;
2042
2043     if ((scan->termListAndStartPoint =
2044          p_query_scan(scan->odr, PROTO_Z3950, &scan->attributeSet,
2045                       start)))
2046     {
2047         ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_SCAN);
2048         task->u.scan.scan = scan;
2049
2050         (scan->refcount)++;
2051         if (!c->async)
2052         {
2053             while (ZOOM_event (1, &c))
2054                 ;
2055         }
2056     }
2057     return scan;
2058 }
2059
2060 ZOOM_API(void)
2061 ZOOM_scanset_destroy (ZOOM_scanset scan)
2062 {
2063     if (!scan)
2064         return;
2065     (scan->refcount)--;
2066     if (scan->refcount == 0)
2067     {
2068         odr_destroy (scan->odr);
2069
2070         ZOOM_options_destroy (scan->options);
2071         xfree (scan);
2072     }
2073 }
2074
2075 static zoom_ret send_package (ZOOM_connection c)
2076 {
2077     ZOOM_Event event;
2078     if (!c->tasks)
2079         return zoom_complete;
2080     assert (c->tasks->which == ZOOM_TASK_PACKAGE);
2081
2082     event = ZOOM_Event_create (ZOOM_EVENT_SEND_APDU);
2083     ZOOM_connection_put_event (c, event);
2084
2085     return do_write_ex (c, c->tasks->u.package->buf_out,
2086                         c->tasks->u.package->len_out);
2087 }
2088
2089 static zoom_ret send_scan (ZOOM_connection c)
2090 {
2091     ZOOM_scanset scan;
2092     Z_APDU *apdu = zget_APDU(c->odr_out, Z_APDU_scanRequest);
2093     Z_ScanRequest *req = apdu->u.scanRequest;
2094     if (!c->tasks)
2095         return zoom_complete;
2096     assert (c->tasks->which == ZOOM_TASK_SCAN);
2097     scan = c->tasks->u.scan.scan;
2098
2099     req->termListAndStartPoint = scan->termListAndStartPoint;
2100     req->attributeSet = scan->attributeSet;
2101
2102     *req->numberOfTermsRequested =
2103         ZOOM_options_get_int(scan->options, "number", 10);
2104
2105     req->preferredPositionInResponse =
2106         odr_intdup (c->odr_out,
2107                     ZOOM_options_get_int(scan->options, "position", 1));
2108
2109     req->stepSize =
2110         odr_intdup (c->odr_out,
2111                     ZOOM_options_get_int(scan->options, "stepSize", 0));
2112
2113     req->databaseNames = set_DatabaseNames (c, scan->options,
2114                                             &req->num_databaseNames);
2115
2116     return send_APDU (c, apdu);
2117 }
2118
2119 ZOOM_API(size_t)
2120 ZOOM_scanset_size (ZOOM_scanset scan)
2121 {
2122     if (!scan || !scan->scan_response || !scan->scan_response->entries)
2123         return 0;
2124     return scan->scan_response->entries->num_entries;
2125 }
2126
2127 ZOOM_API(const char *)
2128 ZOOM_scanset_term (ZOOM_scanset scan, size_t pos,
2129                                int *occ, int *len)
2130 {
2131     const char *term = 0;
2132     size_t noent = ZOOM_scanset_size (scan);
2133     Z_ScanResponse *res = scan->scan_response;
2134
2135     *len = 0;
2136     *occ = 0;
2137     if (pos >= noent)
2138         return 0;
2139     if (res->entries->entries[pos]->which == Z_Entry_termInfo)
2140     {
2141         Z_TermInfo *t = res->entries->entries[pos]->u.termInfo;
2142
2143         if (t->term->which == Z_Term_general)
2144         {
2145             term = (const char *) t->term->u.general->buf;
2146             *len = t->term->u.general->len;
2147         }
2148         *occ = t->globalOccurrences ? *t->globalOccurrences : 0;
2149     }
2150     return term;
2151 }
2152
2153 ZOOM_API(const char *)
2154 ZOOM_scanset_option_get (ZOOM_scanset scan, const char *key)
2155 {
2156     return ZOOM_options_get (scan->options, key);
2157 }
2158
2159 ZOOM_API(void)
2160 ZOOM_scanset_option_set (ZOOM_scanset scan, const char *key,
2161                               const char *val)
2162 {
2163     ZOOM_options_set (scan->options, key, val);
2164 }
2165
2166 static Z_APDU *create_es_package (ZOOM_package p, int type)
2167 {
2168     const char *str;
2169     Z_APDU *apdu = zget_APDU(p->odr_out, Z_APDU_extendedServicesRequest);
2170     Z_ExtendedServicesRequest *req = apdu->u.extendedServicesRequest;
2171
2172     *req->function = Z_ExtendedServicesRequest_create;
2173
2174     str = ZOOM_options_get(p->options, "package-name");
2175     if (str && *str)
2176         req->packageName = nmem_strdup (p->odr_out->mem, str);
2177
2178     str = ZOOM_options_get(p->options, "user-id");
2179     if (str)
2180         req->userId = nmem_strdup (p->odr_out->mem, str);
2181
2182     req->packageType = yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2183                                               type);
2184
2185     str = ZOOM_options_get(p->options, "function");
2186     if (str)
2187     {
2188         if (!strcmp (str, "create"))
2189             *req->function = 1;
2190         if (!strcmp (str, "delete"))
2191             *req->function = 2;
2192         if (!strcmp (str, "modify"))
2193             *req->function = 3;
2194     }
2195     return apdu;
2196 }
2197
2198 static const char *ill_array_lookup (void *clientData, const char *idx)
2199 {
2200     ZOOM_package p = (ZOOM_package) clientData;
2201     return ZOOM_options_get (p->options, idx+4);
2202 }
2203
2204 static Z_External *encode_ill_request (ZOOM_package p)
2205 {
2206     ODR out = p->odr_out;
2207     ILL_Request *req;
2208     Z_External *r = 0;
2209     struct ill_get_ctl ctl;
2210
2211     ctl.odr = p->odr_out;
2212     ctl.clientData = p;
2213     ctl.f = ill_array_lookup;
2214
2215     req = ill_get_ILLRequest(&ctl, "ill", 0);
2216
2217     if (!ill_Request (out, &req, 0, 0))
2218     {
2219         int ill_request_size;
2220         char *ill_request_buf = odr_getbuf (out, &ill_request_size, 0);
2221         if (ill_request_buf)
2222             odr_setbuf (out, ill_request_buf, ill_request_size, 1);
2223         return 0;
2224     }
2225     else
2226     {
2227         oident oid;
2228         int illRequest_size = 0;
2229         char *illRequest_buf = odr_getbuf (out, &illRequest_size, 0);
2230
2231         oid.proto = PROTO_GENERAL;
2232         oid.oclass = CLASS_GENERAL;
2233         oid.value = VAL_ISO_ILL_1;
2234
2235         r = (Z_External *) odr_malloc (out, sizeof(*r));
2236         r->direct_reference = odr_oiddup(out,oid_getoidbyent(&oid));
2237         r->indirect_reference = 0;
2238         r->descriptor = 0;
2239         r->which = Z_External_single;
2240
2241         r->u.single_ASN1_type = (Odr_oct *)
2242             odr_malloc (out, sizeof(*r->u.single_ASN1_type));
2243         r->u.single_ASN1_type->buf = (unsigned char*)
2244             odr_malloc (out, illRequest_size);
2245         r->u.single_ASN1_type->len = illRequest_size;
2246         r->u.single_ASN1_type->size = illRequest_size;
2247         memcpy (r->u.single_ASN1_type->buf, illRequest_buf, illRequest_size);
2248     }
2249     return r;
2250 }
2251
2252 static Z_ItemOrder *encode_item_order(ZOOM_package p)
2253 {
2254     Z_ItemOrder *req = (Z_ItemOrder *) odr_malloc (p->odr_out, sizeof(*req));
2255     const char *str;
2256
2257     req->which=Z_IOItemOrder_esRequest;
2258     req->u.esRequest = (Z_IORequest *)
2259         odr_malloc(p->odr_out,sizeof(Z_IORequest));
2260
2261     /* to keep part ... */
2262     req->u.esRequest->toKeep = (Z_IOOriginPartToKeep *)
2263         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartToKeep));
2264     req->u.esRequest->toKeep->supplDescription = 0;
2265     req->u.esRequest->toKeep->contact = (Z_IOContact *)
2266         odr_malloc (p->odr_out, sizeof(*req->u.esRequest->toKeep->contact));
2267
2268     str = ZOOM_options_get(p->options, "contact-name");
2269     req->u.esRequest->toKeep->contact->name = str ?
2270         nmem_strdup (p->odr_out->mem, str) : 0;
2271
2272     str = ZOOM_options_get(p->options, "contact-phone");
2273     req->u.esRequest->toKeep->contact->phone = str ?
2274         nmem_strdup (p->odr_out->mem, str) : 0;
2275
2276     str = ZOOM_options_get(p->options, "contact-email");
2277     req->u.esRequest->toKeep->contact->email = str ?
2278         nmem_strdup (p->odr_out->mem, str) : 0;
2279
2280     req->u.esRequest->toKeep->addlBilling = 0;
2281
2282     /* not to keep part ... */
2283     req->u.esRequest->notToKeep = (Z_IOOriginPartNotToKeep *)
2284         odr_malloc(p->odr_out,sizeof(Z_IOOriginPartNotToKeep));
2285
2286     str = ZOOM_options_get(p->options, "itemorder-setname");
2287     if (!str)
2288         str = "default";
2289
2290     if (!*str)
2291         req->u.esRequest->notToKeep->resultSetItem = 0;
2292     else
2293     {
2294         req->u.esRequest->notToKeep->resultSetItem = (Z_IOResultSetItem *)
2295            odr_malloc(p->odr_out, sizeof(Z_IOResultSetItem));
2296
2297         req->u.esRequest->notToKeep->resultSetItem->resultSetId =
2298            nmem_strdup (p->odr_out->mem, str);
2299         req->u.esRequest->notToKeep->resultSetItem->item =
2300             (int *) odr_malloc(p->odr_out, sizeof(int));
2301
2302         str = ZOOM_options_get(p->options, "itemorder-item");
2303         *req->u.esRequest->notToKeep->resultSetItem->item =
2304             (str ? atoi(str) : 1);
2305     }
2306     req->u.esRequest->notToKeep->itemRequest = encode_ill_request(p);
2307
2308     return req;
2309 }
2310
2311 ZOOM_API(void)
2312     ZOOM_package_send (ZOOM_package p, const char *type)
2313 {
2314     Z_APDU *apdu = 0;
2315     ZOOM_connection c;
2316     if (!p)
2317         return;
2318     c = p->connection;
2319     odr_reset (p->odr_out);
2320     xfree (p->buf_out);
2321     p->buf_out = 0;
2322     if (!strcmp(type, "itemorder"))
2323     {
2324         Z_External *r;
2325         apdu = create_es_package (p, VAL_ITEMORDER);
2326         if (apdu)
2327         {
2328             r = (Z_External *) odr_malloc (p->odr_out, sizeof(*r));
2329
2330             r->direct_reference =
2331                 yaz_oidval_to_z3950oid(p->odr_out, CLASS_EXTSERV,
2332                                        VAL_ITEMORDER);
2333             r->descriptor = 0;
2334             r->which = Z_External_itemOrder;
2335             r->indirect_reference = 0;
2336             r->u.itemOrder = encode_item_order (p);
2337
2338             apdu->u.extendedServicesRequest->taskSpecificParameters = r;
2339         }
2340     }
2341     if (apdu)
2342     {
2343         if (encode_APDU(p->connection, apdu, p->odr_out) == 0)
2344         {
2345             char *buf;
2346
2347             ZOOM_task task = ZOOM_connection_add_task (c, ZOOM_TASK_PACKAGE);
2348             task->u.package = p;
2349             buf = odr_getbuf(p->odr_out, &p->len_out, 0);
2350             p->buf_out = (char *) xmalloc (p->len_out);
2351             memcpy (p->buf_out, buf, p->len_out);
2352
2353             (p->refcount)++;
2354             if (!c->async)
2355             {
2356                 while (ZOOM_event (1, &c))
2357                     ;
2358             }
2359         }
2360     }
2361 }
2362
2363 ZOOM_API(ZOOM_package)
2364     ZOOM_connection_package (ZOOM_connection c, ZOOM_options options)
2365 {
2366     ZOOM_package p = (ZOOM_package) xmalloc (sizeof(*p));
2367
2368     p->connection = c;
2369     p->odr_out = odr_createmem (ODR_ENCODE);
2370     p->options = ZOOM_options_create_with_parent2 (options, c->options);
2371     p->refcount = 1;
2372     p->buf_out = 0;
2373     p->len_out = 0;
2374     return p;
2375 }
2376
2377 ZOOM_API(void)
2378     ZOOM_package_destroy(ZOOM_package p)
2379 {
2380     if (!p)
2381         return;
2382     (p->refcount)--;
2383     if (p->refcount == 0)
2384     {
2385         odr_destroy (p->odr_out);
2386         xfree (p->buf_out);
2387
2388         ZOOM_options_destroy (p->options);
2389         xfree (p);
2390     }
2391 }
2392
2393 ZOOM_API(const char *)
2394 ZOOM_package_option_get (ZOOM_package p, const char *key)
2395 {
2396     return ZOOM_options_get (p->options, key);
2397 }
2398
2399
2400 ZOOM_API(void)
2401 ZOOM_package_option_set (ZOOM_package p, const char *key,
2402                               const char *val)
2403 {
2404     ZOOM_options_set (p->options, key, val);
2405 }
2406
2407 static int ZOOM_connection_exec_task (ZOOM_connection c)
2408 {
2409     ZOOM_task task = c->tasks;
2410     zoom_ret ret = zoom_complete;
2411
2412     if (!task)
2413     {
2414         yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task task=<null>");
2415         return 0;
2416     }
2417     yaz_log (LOG_DEBUG, "ZOOM_connection_exec_task type=%d run=%d",
2418              task->which, task->running);
2419     if (c->error != ZOOM_ERROR_NONE)
2420     {
2421         yaz_log (LOG_DEBUG, "remove tasks because of error = %d", c->error);
2422         ZOOM_connection_remove_tasks (c);
2423         return 0;
2424     }
2425     if (task->running)
2426     {
2427         yaz_log (LOG_DEBUG, "task already running");
2428         return 0;
2429     }
2430     task->running = 1;
2431     ret = zoom_complete;
2432     if (c->cs || task->which == ZOOM_TASK_CONNECT)
2433     {
2434         switch (task->which)
2435         {
2436         case ZOOM_TASK_SEARCH:
2437             if (c->proto == PROTO_HTTP)
2438                 ret = ZOOM_connection_srw_send_search(c);
2439             else
2440                 ret = ZOOM_connection_send_search(c);
2441             break;
2442         case ZOOM_TASK_RETRIEVE:
2443             if (c->proto == PROTO_HTTP)
2444                 ret = ZOOM_connection_srw_send_search(c);
2445             else
2446                 ret = send_present (c);
2447             break;
2448         case ZOOM_TASK_CONNECT:
2449             ret = do_connect(c);
2450             break;
2451         case ZOOM_TASK_SCAN:
2452             ret = send_scan(c);
2453             break;
2454         case ZOOM_TASK_PACKAGE:
2455             ret = send_package(c);
2456             break;
2457         }
2458     }
2459     else
2460     {
2461         yaz_log (LOG_DEBUG, "remove tasks because no connection exist");
2462         ZOOM_connection_remove_tasks (c);
2463     }
2464     if (ret == zoom_complete)
2465     {
2466         yaz_log (LOG_DEBUG, "task removed (complete)");
2467         ZOOM_connection_remove_task (c);
2468         return 0;
2469     }
2470     yaz_log (LOG_DEBUG, "task pending");
2471     return 1;
2472 }
2473
2474 static zoom_ret send_sort_present (ZOOM_connection c)
2475 {
2476     zoom_ret r = send_sort (c);
2477     if (r == zoom_complete)
2478         r = send_present (c);
2479     return r;
2480 }
2481
2482 static int es_response (ZOOM_connection c,
2483                         Z_ExtendedServicesResponse *res)
2484 {
2485     if (!c->tasks || c->tasks->which != ZOOM_TASK_PACKAGE)
2486         return 0;
2487     if (res->diagnostics && res->num_diagnostics > 0)
2488         response_diag(c, res->diagnostics[0]);
2489     if (res->taskPackage &&
2490         res->taskPackage->which == Z_External_extendedService)
2491     {
2492         Z_TaskPackage *taskPackage = res->taskPackage->u.extendedService;
2493         Odr_oct *id = taskPackage->targetReference;
2494
2495         if (id)
2496             ZOOM_options_setl (c->tasks->u.package->options,
2497                                "targetReference", (char*) id->buf, id->len);
2498     }
2499     return 1;
2500 }
2501
2502
2503 static void handle_apdu (ZOOM_connection c, Z_APDU *apdu)
2504 {
2505     Z_InitResponse *initrs;
2506
2507     c->mask = 0;
2508     yaz_log (LOG_DEBUG, "handle_apdu type=%d", apdu->which);
2509     switch(apdu->which)
2510     {
2511     case Z_APDU_initResponse:
2512         initrs = apdu->u.initResponse;
2513         ZOOM_connection_option_set(c, "targetImplementationId",
2514                                    initrs->implementationId ?
2515                                    initrs->implementationId : "");
2516         ZOOM_connection_option_set(c, "targetImplementationName",
2517                                    initrs->implementationName ?
2518                                    initrs->implementationName : "");
2519         ZOOM_connection_option_set(c, "targetImplementationVersion",
2520                                    initrs->implementationVersion ?
2521                                    initrs->implementationVersion : "");
2522         if (!*initrs->result)
2523         {
2524             set_ZOOM_error(c, ZOOM_ERROR_INIT, 0);
2525         }
2526         else
2527         {
2528             char *cookie =
2529                 yaz_oi_get_string_oidval (&apdu->u.initResponse->otherInfo,
2530                                           VAL_COOKIE, 1, 0);
2531             xfree (c->cookie_in);
2532             c->cookie_in = 0;
2533             if (cookie)
2534                 c->cookie_in = xstrdup(cookie);
2535             if (ODR_MASK_GET(initrs->options, Z_Options_namedResultSets) &&
2536                 ODR_MASK_GET(initrs->protocolVersion, Z_ProtocolVersion_3))
2537                 c->support_named_resultsets = 1;
2538             if (c->tasks)
2539             {
2540                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
2541                 ZOOM_connection_remove_task (c);
2542             }
2543             ZOOM_connection_exec_task (c);
2544         }
2545         if (ODR_MASK_GET(initrs->options, Z_Options_negotiationModel))
2546         {
2547             NMEM tmpmem = nmem_create();
2548             Z_CharSetandLanguageNegotiation *p =
2549                 yaz_get_charneg_record(initrs->otherInfo);
2550
2551             if (p)
2552             {
2553                 char *charset=NULL, *lang=NULL;
2554                 int sel;
2555
2556                 yaz_get_response_charneg(tmpmem, p, &charset, &lang, &sel);
2557                 yaz_log(LOG_DEBUG, "Target accepted: charset %s, "
2558                         "language %s, select %d",
2559                         charset ? charset : "none", lang ? lang : "none", sel);
2560                 if (charset)
2561                     ZOOM_connection_option_set (c, "negotiation-charset",
2562                                                 charset);
2563                 if (lang)
2564                     ZOOM_connection_option_set (c, "negotiation-lang",
2565                                                 lang);
2566                 nmem_destroy(tmpmem);
2567             }
2568         }
2569         break;
2570     case Z_APDU_searchResponse:
2571         handle_search_response (c, apdu->u.searchResponse);
2572         if (send_sort_present (c) == zoom_complete)
2573             ZOOM_connection_remove_task (c);
2574         break;
2575     case Z_APDU_presentResponse:
2576         handle_present_response (c, apdu->u.presentResponse);
2577         if (send_present (c) == zoom_complete)
2578             ZOOM_connection_remove_task (c);
2579         break;
2580     case Z_APDU_sortResponse:
2581         sort_response (c, apdu->u.sortResponse);
2582         if (send_present (c) == zoom_complete)
2583             ZOOM_connection_remove_task (c);
2584         break;
2585     case Z_APDU_scanResponse:
2586         scan_response (c, apdu->u.scanResponse);
2587         ZOOM_connection_remove_task (c);
2588         break;
2589     case Z_APDU_extendedServicesResponse:
2590         es_response (c, apdu->u.extendedServicesResponse);
2591         ZOOM_connection_remove_task (c);
2592         break;
2593     case Z_APDU_close:
2594         if (c->reconnect_ok)
2595         {
2596             do_close(c);
2597             c->tasks->running = 0;
2598             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2599         }
2600         else
2601         {
2602             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2603             do_close(c);
2604         }
2605         break;
2606     default:
2607         set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2608         do_close(c);
2609     }
2610 }
2611
2612 #if HAVE_XML2
2613 static void handle_srw_response(ZOOM_connection c,
2614                                 Z_SRW_searchRetrieveResponse *res)
2615 {
2616     ZOOM_resultset resultset = 0;
2617     int i;
2618     NMEM nmem;
2619     ZOOM_Event event;
2620
2621     if (!c->tasks)
2622         return;
2623
2624     if (c->tasks->which == ZOOM_TASK_SEARCH)
2625         resultset = c->tasks->u.search.resultset;
2626     else if (c->tasks->which == ZOOM_TASK_RETRIEVE)
2627         resultset = c->tasks->u.retrieve.resultset;
2628     else
2629         return ;
2630
2631     event = ZOOM_Event_create(ZOOM_EVENT_RECV_SEARCH);
2632     ZOOM_connection_put_event(c, event);
2633
2634     resultset->size = 0;
2635
2636     yaz_log(LOG_DEBUG, "got SRW response OK");
2637
2638     if (res->numberOfRecords)
2639         resultset->size = *res->numberOfRecords;
2640
2641     for (i = 0; i<res->num_records; i++)
2642     {
2643         int pos;
2644
2645         Z_NamePlusRecord *npr = (Z_NamePlusRecord *)
2646             odr_malloc(c->odr_in, sizeof(Z_NamePlusRecord));
2647
2648         if (res->records[i].recordPosition &&
2649             *res->records[i].recordPosition > 0)
2650             pos = *res->records[i].recordPosition - 1;
2651         else
2652             pos = resultset->start + i;
2653
2654         npr->databaseName = 0;
2655         npr->which = Z_NamePlusRecord_databaseRecord;
2656         npr->u.databaseRecord = (Z_External *)
2657             odr_malloc(c->odr_in, sizeof(Z_External));
2658         npr->u.databaseRecord->descriptor = 0;
2659         npr->u.databaseRecord->direct_reference =
2660             yaz_oidval_to_z3950oid(c->odr_in, CLASS_RECSYN, VAL_TEXT_XML);
2661         npr->u.databaseRecord->which = Z_External_octet;
2662         npr->u.databaseRecord->u.octet_aligned = (Odr_oct *)
2663             odr_malloc(c->odr_in, sizeof(Odr_oct));
2664         npr->u.databaseRecord->u.octet_aligned->buf =
2665             res->records[i].recordData_buf;
2666         npr->u.databaseRecord->u.octet_aligned->len =
2667             npr->u.databaseRecord->u.octet_aligned->size =
2668             res->records[i].recordData_len;
2669         record_cache_add (resultset, npr, pos);
2670     }
2671     if (res->num_diagnostics > 0)
2672     {
2673         set_dset_error(c, *res->diagnostics[0].code, "SRW",
2674                        res->diagnostics[0].details, 0);
2675     }
2676     nmem = odr_extract_mem(c->odr_in);
2677     nmem_transfer(resultset->odr->mem, nmem);
2678     nmem_destroy(nmem);
2679 }
2680 #endif
2681
2682 #if HAVE_XML2
2683 static void handle_http(ZOOM_connection c, Z_HTTP_Response *hres)
2684 {
2685     int ret = -1;
2686     const char *content_type = z_HTTP_header_lookup(hres->headers,
2687                                                     "Content-Type");
2688     const char *connection_head = z_HTTP_header_lookup(hres->headers,
2689                                                        "Connection");
2690     c->mask = 0;
2691     yaz_log (LOG_DEBUG, "handle_http");
2692
2693     if (content_type && !yaz_strcmp_del("text/xml", content_type, "; "))
2694     {
2695         Z_SOAP *soap_package = 0;
2696         ODR o = odr_createmem(ODR_DECODE);
2697         Z_SOAP_Handler soap_handlers[2] = {
2698             {"http://www.loc.gov/zing/srw/v1.0/", 0,
2699              (Z_SOAP_fun) yaz_srw_codec},
2700             {0, 0, 0}
2701         };
2702         ret = z_soap_codec(o, &soap_package,
2703                            &hres->content_buf, &hres->content_len,
2704                            soap_handlers);
2705         if (!ret && soap_package->which == Z_SOAP_generic &&
2706             soap_package->u.generic->no == 0)
2707         {
2708             Z_SRW_PDU *sr = soap_package->u.generic->p;
2709             if (sr->which == Z_SRW_searchRetrieve_response)
2710                 handle_srw_response(c, sr->u.response);
2711             else
2712                 ret = -1;
2713         }
2714         else if (!ret && (soap_package->which == Z_SOAP_fault
2715                           || soap_package->which == Z_SOAP_error))
2716         {
2717             set_HTTP_error(c, hres->code,
2718                            soap_package->u.fault->fault_code,
2719                            soap_package->u.fault->fault_string);
2720         }
2721         else
2722             ret = -1;
2723         odr_destroy(o);
2724     }
2725     if (ret)
2726     {
2727         if (hres->code != 200)
2728             set_HTTP_error(c, hres->code, 0, 0);
2729         else
2730             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2731         do_close (c);
2732     }
2733     ZOOM_connection_remove_task(c);
2734     if (!strcmp(hres->version, "1.0"))
2735     {
2736         /* HTTP 1.0: only if Keep-Alive we stay alive.. */
2737         if (!connection_head || strcmp(connection_head, "Keep-Alive"))
2738             do_close(c);
2739     }
2740     else
2741     {
2742         /* HTTP 1.1: only if no close we stay alive .. */
2743         if (connection_head && !strcmp(connection_head, "close"))
2744             do_close(c);
2745     }
2746 }
2747 #endif
2748
2749 static int do_read (ZOOM_connection c)
2750 {
2751     int r;
2752     ZOOM_Event event;
2753
2754     event = ZOOM_Event_create (ZOOM_EVENT_RECV_DATA);
2755     ZOOM_connection_put_event (c, event);
2756
2757     yaz_log (LOG_DEBUG, "do_read len=%d", c->len_in);
2758
2759     r = cs_get (c->cs, &c->buf_in, &c->len_in);
2760     if (r == 1)
2761         return 0;
2762     if (r <= 0)
2763     {
2764         if (c->reconnect_ok)
2765         {
2766             do_close (c);
2767             c->reconnect_ok = 0;
2768             yaz_log (LOG_DEBUG, "reconnect read");
2769             c->tasks->running = 0;
2770             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2771         }
2772         else
2773         {
2774             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2775             do_close (c);
2776         }
2777     }
2778     else
2779     {
2780         Z_GDU *gdu;
2781         ZOOM_Event event;
2782
2783         odr_reset (c->odr_in);
2784         odr_setbuf (c->odr_in, c->buf_in, r, 0);
2785         event = ZOOM_Event_create (ZOOM_EVENT_RECV_APDU);
2786         ZOOM_connection_put_event (c, event);
2787
2788         if (!z_GDU (c->odr_in, &gdu, 0, 0))
2789         {
2790             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2791             do_close (c);
2792         }
2793         else if (gdu->which == Z_GDU_Z3950)
2794             handle_apdu (c, gdu->u.z3950);
2795         else if (gdu->which == Z_GDU_HTTP_Response)
2796         {
2797 #if HAVE_XML2
2798             handle_http (c, gdu->u.HTTP_Response);
2799 #else
2800             set_ZOOM_error(c, ZOOM_ERROR_DECODE, 0);
2801             do_close (c);
2802 #endif
2803         }
2804         c->reconnect_ok = 0;
2805     }
2806     return 1;
2807 }
2808
2809 static zoom_ret do_write_ex (ZOOM_connection c, char *buf_out, int len_out)
2810 {
2811     int r;
2812     ZOOM_Event event;
2813
2814     event = ZOOM_Event_create(ZOOM_EVENT_SEND_DATA);
2815     ZOOM_connection_put_event (c, event);
2816
2817     yaz_log (LOG_DEBUG, "do_write_ex len=%d", len_out);
2818     if ((r=cs_put (c->cs, buf_out, len_out)) < 0)
2819     {
2820         if (c->reconnect_ok)
2821         {
2822             do_close (c);
2823             c->reconnect_ok = 0;
2824             yaz_log (LOG_DEBUG, "reconnect write");
2825             c->tasks->running = 0;
2826             ZOOM_connection_insert_task (c, ZOOM_TASK_CONNECT);
2827             return zoom_pending;
2828         }
2829         if (c->state == STATE_CONNECTING)
2830             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2831         else
2832             set_ZOOM_error(c, ZOOM_ERROR_CONNECTION_LOST, 0);
2833         do_close (c);
2834         return zoom_complete;
2835     }
2836     else if (r == 1)
2837     {
2838         c->mask = ZOOM_SELECT_EXCEPT;
2839         if (c->cs->io_pending & CS_WANT_WRITE)
2840             c->mask += ZOOM_SELECT_WRITE;
2841         if (c->cs->io_pending & CS_WANT_READ)
2842             c->mask += ZOOM_SELECT_READ;
2843         yaz_log (LOG_DEBUG, "do_write_ex 1 mask=%d", c->mask);
2844     }
2845     else
2846     {
2847         c->mask = ZOOM_SELECT_READ|ZOOM_SELECT_EXCEPT;
2848         yaz_log (LOG_DEBUG, "do_write_ex 2 mask=%d", c->mask);
2849     }
2850     return zoom_pending;
2851 }
2852
2853 static zoom_ret do_write(ZOOM_connection c)
2854 {
2855     return do_write_ex (c, c->buf_out, c->len_out);
2856 }
2857
2858
2859 ZOOM_API(const char *)
2860 ZOOM_connection_option_get (ZOOM_connection c, const char *key)
2861 {
2862     return ZOOM_options_get (c->options, key);
2863 }
2864
2865 ZOOM_API(void)
2866 ZOOM_connection_option_set (ZOOM_connection c, const char *key,
2867                                   const char *val)
2868 {
2869     ZOOM_options_set (c->options, key, val);
2870 }
2871
2872 ZOOM_API(const char *)
2873 ZOOM_resultset_option_get (ZOOM_resultset r, const char *key)
2874 {
2875     return ZOOM_options_get (r->options, key);
2876 }
2877
2878 ZOOM_API(void)
2879 ZOOM_resultset_option_set (ZOOM_resultset r, const char *key,
2880                                   const char *val)
2881 {
2882     ZOOM_options_set (r->options, key, val);
2883 }
2884
2885
2886 ZOOM_API(int)
2887 ZOOM_connection_errcode (ZOOM_connection c)
2888 {
2889     return ZOOM_connection_error (c, 0, 0);
2890 }
2891
2892 ZOOM_API(const char *)
2893 ZOOM_connection_errmsg (ZOOM_connection c)
2894 {
2895     const char *msg;
2896     ZOOM_connection_error (c, &msg, 0);
2897     return msg;
2898 }
2899
2900 ZOOM_API(const char *)
2901 ZOOM_connection_addinfo (ZOOM_connection c)
2902 {
2903     const char *addinfo;
2904     ZOOM_connection_error (c, 0, &addinfo);
2905     return addinfo;
2906 }
2907
2908 ZOOM_API(const char *)
2909 ZOOM_diag_str (int error)
2910 {
2911     switch (error)
2912     {
2913     case ZOOM_ERROR_NONE:
2914         return "No error";
2915     case ZOOM_ERROR_CONNECT:
2916         return "Connect failed";
2917     case ZOOM_ERROR_MEMORY:
2918         return "Out of memory";
2919     case ZOOM_ERROR_ENCODE:
2920         return "Encoding failed";
2921     case ZOOM_ERROR_DECODE:
2922         return "Decoding failed";
2923     case ZOOM_ERROR_CONNECTION_LOST:
2924         return "Connection lost";
2925     case ZOOM_ERROR_INIT:
2926         return "Init rejected";
2927     case ZOOM_ERROR_INTERNAL:
2928         return "Internal failure";
2929     case ZOOM_ERROR_TIMEOUT:
2930         return "Timeout";
2931     case ZOOM_ERROR_UNSUPPORTED_PROTOCOL:
2932         return "Unsupported protocol";
2933     case ZOOM_ERROR_UNSUPPORTED_QUERY:
2934         return "Unsupported query type";
2935     default:
2936         return diagbib1_str (error);
2937     }
2938 }
2939
2940 ZOOM_API(int)
2941 ZOOM_connection_error_x (ZOOM_connection c, const char **cp,
2942                          const char **addinfo, const char **diagset)
2943 {
2944     int error = c->error;
2945     if (cp)
2946     {
2947         if (!c->diagset || !strcmp(c->diagset, "ZOOM"))
2948             *cp = ZOOM_diag_str(error);
2949         else if (!strcmp(c->diagset, "HTTP"))
2950             *cp = z_HTTP_errmsg(c->error);
2951         else if (!strcmp(c->diagset, "Bib-1"))
2952             *cp = ZOOM_diag_str(error);
2953         else if (!strcmp(c->diagset, "SRW"))
2954             *cp = yaz_diag_srw_str(c->error);
2955         else
2956             *cp = "Unknown error and diagnostic set";
2957     }
2958     if (addinfo)
2959         *addinfo = c->addinfo ? c->addinfo : "";
2960     if (diagset)
2961         *diagset = c->diagset ? c->diagset : "";
2962     return c->error;
2963 }
2964
2965 ZOOM_API(int)
2966 ZOOM_connection_error (ZOOM_connection c, const char **cp,
2967                        const char **addinfo)
2968 {
2969     return ZOOM_connection_error_x(c, cp, addinfo, 0);
2970 }
2971
2972 static int ZOOM_connection_do_io(ZOOM_connection c, int mask)
2973 {
2974     ZOOM_Event event = 0;
2975     int r = cs_look(c->cs);
2976     yaz_log (LOG_DEBUG, "ZOOM_connection_do_io c=%p mask=%d cs_look=%d",
2977              c, mask, r);
2978
2979     if (r == CS_NONE)
2980     {
2981         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2982         set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
2983         do_close (c);
2984         ZOOM_connection_put_event (c, event);
2985     }
2986     else if (r == CS_CONNECT)
2987     {
2988         int ret;
2989         event = ZOOM_Event_create (ZOOM_EVENT_CONNECT);
2990
2991         ret = cs_rcvconnect (c->cs);
2992         yaz_log (LOG_DEBUG, "cs_rcvconnect returned %d", ret);
2993         if (ret == 1)
2994         {
2995             c->mask = ZOOM_SELECT_EXCEPT;
2996             if (c->cs->io_pending & CS_WANT_WRITE)
2997                 c->mask += ZOOM_SELECT_WRITE;
2998             if (c->cs->io_pending & CS_WANT_READ)
2999                 c->mask += ZOOM_SELECT_READ;
3000             ZOOM_connection_put_event (c, event);
3001         }
3002         else if (ret == 0)
3003         {
3004             ZOOM_connection_put_event (c, event);
3005             if (c->proto == PROTO_Z3950)
3006                 ZOOM_connection_send_init(c);
3007             else
3008             {
3009                 /* no init request for SRW .. */
3010                 assert (c->tasks->which == ZOOM_TASK_CONNECT);
3011                 ZOOM_connection_remove_task (c);
3012                 c->mask = 0;
3013                 ZOOM_connection_exec_task (c);
3014             }
3015             c->state = STATE_ESTABLISHED;
3016         }
3017         else
3018         {
3019             set_ZOOM_error(c, ZOOM_ERROR_CONNECT, 0);
3020             do_close (c);
3021             ZOOM_connection_put_event (c, event);
3022         }
3023     }
3024     else
3025     {
3026         if (mask & ZOOM_SELECT_READ)
3027             do_read (c);
3028         if (c->cs && (mask & ZOOM_SELECT_WRITE))
3029             do_write (c);
3030     }
3031     return 1;
3032 }
3033
3034 ZOOM_API(int)
3035 ZOOM_connection_last_event(ZOOM_connection cs)
3036 {
3037     if (!cs)
3038         return ZOOM_EVENT_NONE;
3039     return cs->last_event;
3040 }
3041
3042 ZOOM_API(int)
3043 ZOOM_event (int no, ZOOM_connection *cs)
3044 {
3045     int timeout = 5000;
3046 #if HAVE_SYS_POLL_H
3047     struct pollfd pollfds[1024];
3048     ZOOM_connection poll_cs[1024];
3049 #else
3050     struct timeval tv;
3051     fd_set input, output, except;
3052 #endif
3053     int i, r, nfds;
3054     int max_fd = 0;
3055
3056     for (i = 0; i<no; i++)
3057     {
3058         ZOOM_connection c = cs[i];
3059         ZOOM_Event event;
3060         if (c && (event = ZOOM_connection_get_event(c)))
3061         {
3062             ZOOM_Event_destroy (event);
3063             return i+1;
3064         }
3065     }
3066     for (i = 0; i<no; i++)
3067     {
3068         ZOOM_connection c = cs[i];
3069         ZOOM_Event event;
3070         if (c && ZOOM_connection_exec_task (c))
3071         {
3072             if ((event = ZOOM_connection_get_event(c)))
3073             {
3074                 ZOOM_Event_destroy (event);
3075                 return i+1;
3076             }
3077         }
3078     }
3079 #if HAVE_SYS_POLL_H
3080
3081 #else
3082     FD_ZERO (&input);
3083     FD_ZERO (&output);
3084     FD_ZERO (&except);
3085 #endif
3086     nfds = 0;
3087     for (i = 0; i<no; i++)
3088     {
3089         ZOOM_connection c = cs[i];
3090         int fd, mask;
3091         int this_timeout;
3092
3093         if (!c)
3094             continue;
3095         fd = z3950_connection_socket(c);
3096         mask = z3950_connection_mask(c);
3097
3098         if (fd == -1)
3099             continue;
3100         if (max_fd < fd)
3101             max_fd = fd;
3102
3103         this_timeout = ZOOM_options_get_int (c->options, "timeout", -1);
3104         if (this_timeout != -1 && this_timeout < timeout)
3105             timeout = this_timeout;
3106 #if HAVE_SYS_POLL_H
3107         if (mask)
3108         {
3109             short poll_events = 0;
3110
3111             if (mask & ZOOM_SELECT_READ)
3112                 poll_events += POLLIN;
3113             if (mask & ZOOM_SELECT_WRITE)
3114                 poll_events += POLLOUT;
3115             if (mask & ZOOM_SELECT_EXCEPT)
3116                 poll_events += POLLERR;
3117             pollfds[nfds].fd = fd;
3118             pollfds[nfds].events = poll_events;
3119             pollfds[nfds].revents = 0;
3120             poll_cs[nfds] = c;
3121             nfds++;
3122         }
3123 #else
3124         if (mask & ZOOM_SELECT_READ)
3125         {
3126             FD_SET (fd, &input);
3127             nfds++;
3128         }
3129         if (mask & ZOOM_SELECT_WRITE)
3130         {
3131             FD_SET (fd, &output);
3132             nfds++;
3133         }
3134         if (mask & ZOOM_SELECT_EXCEPT)
3135         {
3136             FD_SET (fd, &except);
3137             nfds++;
3138         }
3139 #endif
3140     }
3141     if (timeout >= 5000)
3142         timeout = 30;
3143
3144     if (!nfds)
3145         return 0;
3146
3147 #if HAVE_SYS_POLL_H
3148     r = poll (pollfds, nfds, timeout * 1000);
3149     for (i = 0; i<nfds; i++)
3150     {
3151         ZOOM_connection c = poll_cs[i];
3152         if (r && c->mask)
3153         {
3154             int mask = 0;
3155             if (pollfds[i].revents & POLLIN)
3156                 mask += ZOOM_SELECT_READ;
3157             if (pollfds[i].revents & POLLOUT)
3158                 mask += ZOOM_SELECT_WRITE;
3159             if (pollfds[i].revents & POLLERR)
3160                 mask += ZOOM_SELECT_EXCEPT;
3161             if (mask)
3162                 ZOOM_connection_do_io(c, mask);
3163         }
3164         else if (r == 0 && c->mask)
3165         {
3166             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3167             /* timeout and this connection was waiting */
3168             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3169             do_close (c);
3170             ZOOM_connection_put_event(c, event);
3171         }
3172     }
3173 #else
3174     tv.tv_sec = timeout;
3175     tv.tv_usec = 0;
3176     yaz_log (LOG_DEBUG, "select start");
3177     r = select (max_fd+1, &input, &output, &except, &tv);
3178     yaz_log (LOG_DEBUG, "select stop, returned r=%d", r);
3179     for (i = 0; i<no; i++)
3180     {
3181         ZOOM_connection c = cs[i];
3182         int fd, mask;
3183
3184         if (!c)
3185             continue;
3186         fd = z3950_connection_socket(c);
3187         mask = 0;
3188         if (r && c->mask)
3189         {
3190             /* no timeout and real socket */
3191             if (FD_ISSET(fd, &input))
3192                 mask += ZOOM_SELECT_READ;
3193             if (FD_ISSET(fd, &output))
3194                 mask += ZOOM_SELECT_WRITE;
3195             if (FD_ISSET(fd, &except))
3196                 mask += ZOOM_SELECT_EXCEPT;
3197             if (mask)
3198                 ZOOM_connection_do_io(c, mask);
3199         }
3200         if (r == 0 && c->mask)
3201         {
3202             ZOOM_Event event = ZOOM_Event_create(ZOOM_EVENT_TIMEOUT);
3203             /* timeout and this connection was waiting */
3204             set_ZOOM_error(c, ZOOM_ERROR_TIMEOUT, 0);
3205             do_close (c);
3206             yaz_log (LOG_DEBUG, "timeout");
3207             ZOOM_connection_put_event(c, event);
3208         }
3209     }
3210 #endif
3211     for (i = 0; i<no; i++)
3212     {
3213         ZOOM_connection c = cs[i];
3214         ZOOM_Event event;
3215         if (c && (event = ZOOM_connection_get_event(c)))
3216         {
3217             ZOOM_Event_destroy (event);
3218             return i+1;
3219         }
3220     }
3221     return 0;
3222 }