src/seshigh.c

   1 /* This file is part of the YAZ toolkit.
   2  * Copyright (C) 1995-2013 Index Data
   3  * See the file LICENSE for details.
   4  */
   5 /**
   6  * \file seshigh.c
   7  * \brief Implements GFS session logic.
   8  *
   9  * Frontend server logic.
  10  *
  11  * This code receives incoming APDUs, and handles client requests by means
  12  * of the backend API.
  13  *
  14  * Some of the code is getting quite involved, compared to simpler servers -
  15  * primarily because it is asynchronous both in the communication with
  16  * the user and the backend. We think the complexity will pay off in
  17  * the form of greater flexibility when more asynchronous facilities
  18  * are implemented.
  19  *
  20  * Memory management has become somewhat involved. In the simple case, where
  21  * only one PDU is pending at a time, it will simply reuse the same memory,
  22  * once it has found its working size. When we enable multiple concurrent
  23  * operations, perhaps even with multiple parallel calls to the backend, it
  24  * will maintain a pool of buffers for encoding and decoding, trying to
  25  * minimize memory allocation/deallocation during normal operation.
  26  *
  27  */
  28 #if HAVE_CONFIG_H
  29 #include <config.h>
  30 #endif
  31
  32 #include <limits.h>
  33 #include <stdlib.h>
  34 #include <stdio.h>
  35 #include <assert.h>
  36
  37 #if HAVE_SYS_TYPES_H
  38 #include <sys/types.h>
  39 #endif
  40 #if HAVE_SYS_STAT_H
  41 #include <sys/stat.h>
  42 #endif
  43
  44 #ifdef WIN32
  45 #include <io.h>
  46 #define S_ISREG(x) (x & _S_IFREG)
  47 #include <process.h>
  48 #endif
  49
  50 #if HAVE_UNISTD_H
  51 #include <unistd.h>
  52 #endif
  53
  54 #if YAZ_HAVE_XML2
  55 #include <libxml/parser.h>
  56 #include <libxml/tree.h>
  57 #endif
  58
  59 #include <yaz/facet.h>
  60 #include <yaz/xmalloc.h>
  61 #include <yaz/comstack.h>
  62 #include "eventl.h"
  63 #include "session.h"
  64 #include "mime.h"
  65 #include <yaz/proto.h>
  66 #include <yaz/oid_db.h>
  67 #include <yaz/log.h>
  68 #include <yaz/logrpn.h>
  69 #include <yaz/querytowrbuf.h>
  70 #include <yaz/statserv.h>
  71 #include <yaz/diagbib1.h>
  72 #include <yaz/charneg.h>
  73 #include <yaz/otherinfo.h>
  74 #include <yaz/yaz-util.h>
  75 #include <yaz/pquery.h>
  76 #include <yaz/oid_db.h>
  77
  78 #include <yaz/srw.h>
  79 #include <yaz/backend.h>
  80 #include <yaz/yaz-ccl.h>
  81
  82 static void process_gdu_request(association *assoc, request *req);
  83 static int process_z_request(association *assoc, request *req, char **msg);
  84 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  85 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  86 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  87 static Z_External *init_diagnostics(ODR odr, int errcode,
  88                                     const char *errstring);
  89 static Z_APDU *process_searchRequest(association *assoc, request *reqb);
  90 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  91                                       bend_search_rr *bsrr);
  92 static Z_APDU *process_presentRequest(association *assoc, request *reqb);
  93 static Z_APDU *process_scanRequest(association *assoc, request *reqb);
  94 static Z_APDU *process_sortRequest(association *assoc, request *reqb);
  95 static void process_close(association *assoc, request *reqb);
  96 static Z_APDU *process_deleteRequest(association *assoc, request *reqb);
  97 static Z_APDU *process_segmentRequest(association *assoc, request *reqb);
  98 static Z_APDU *process_ESRequest(association *assoc, request *reqb);
  99
 100 /* dynamic logging levels */
 101 static int logbits_set = 0;
 102 static int log_session = 0; /* one-line logs for session */
 103 static int log_sessiondetail = 0; /* more detailed stuff */
 104 static int log_request = 0; /* one-line logs for requests */
 105 static int log_requestdetail = 0;  /* more detailed stuff */
 106
 107 /** get_logbits sets global loglevel bits */
 108 static void get_logbits(void)
 109 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 110     if (!logbits_set)
 111     {
 112         logbits_set = 1;
 113         log_session = yaz_log_module_level("session");
 114         log_sessiondetail = yaz_log_module_level("sessiondetail");
 115         log_request = yaz_log_module_level("request");
 116         log_requestdetail = yaz_log_module_level("requestdetail");
 117     }
 118 }
 119
 120 static void wr_diag(WRBUF w, int error, const char *addinfo)
 121 {
 122     wrbuf_printf(w, "ERROR %d+", error);
 123     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
 124     if (addinfo)
 125     {
 126         wrbuf_puts(w, "+");
 127         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
 128     }
 129     wrbuf_puts(w, " ");
 130 }
 131
 132 static int odr_int_to_int(Odr_int v)
 133 {
 134     if (v >= INT_MAX)
 135         return INT_MAX;
 136     else if (v <= INT_MIN)
 137         return INT_MIN;
 138     else
 139         return (int) v;
 140 }
 141
 142 /*
 143  * Create and initialize a new association-handle.
 144  *  channel  : iochannel for the current line.
 145  *  link     : communications channel.
 146  * Returns: 0 or a new association handle.
 147  */
 148 association *create_association(IOCHAN channel, COMSTACK link,
 149                                 const char *apdufile)
 150 {
 151     association *anew;
 152
 153     if (!logbits_set)
 154         get_logbits();
 155     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 156         return 0;
 157     anew->init = 0;
 158     anew->version = 0;
 159     anew->last_control = 0;
 160     anew->client_chan = channel;
 161     anew->client_link = link;
 162     anew->cs_get_mask = 0;
 163     anew->cs_put_mask = 0;
 164     anew->cs_accept_mask = 0;
 165     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 166         !(anew->encode = odr_createmem(ODR_ENCODE)))
 167         return 0;
 168     if (apdufile && *apdufile)
 169     {
 170         FILE *f;
 171
 172         if (!(anew->print = odr_createmem(ODR_PRINT)))
 173             return 0;
 174         if (*apdufile == '@')
 175         {
 176             odr_setprint(anew->print, yaz_log_file());
 177         }
 178         else if (*apdufile != '-')
 179         {
 180             char filename[256];
 181             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 182             if (!(f = fopen(filename, "w")))
 183             {
 184                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 185                 return 0;
 186             }
 187             setvbuf(f, 0, _IONBF, 0);
 188             odr_setprint(anew->print, f);
 189         }
 190     }
 191     else
 192         anew->print = 0;
 193     anew->input_buffer = 0;
 194     anew->input_buffer_len = 0;
 195     anew->backend = 0;
 196     anew->state = ASSOC_NEW;
 197     request_initq(&anew->incoming);
 198     request_initq(&anew->outgoing);
 199     anew->proto = cs_getproto(link);
 200     anew->server = 0;
 201     return anew;
 202 }
 203
 204 /*
 205  * Free association and release resources.
 206  */
 207 void destroy_association(association *h)
 208 {
 209     statserv_options_block *cb = statserv_getcontrol();
 210     request *req;
 211
 212     xfree(h->init);
 213     odr_destroy(h->decode);
 214     odr_destroy(h->encode);
 215     if (h->print)
 216         odr_destroy(h->print);
 217     if (h->input_buffer)
 218     xfree(h->input_buffer);
 219     if (h->backend)
 220         (*cb->bend_close)(h->backend);
 221     while ((req = request_deq(&h->incoming)))
 222         request_release(req);
 223     while ((req = request_deq(&h->outgoing)))
 224         request_release(req);
 225     request_delq(&h->incoming);
 226     request_delq(&h->outgoing);
 227     xfree(h);
 228     xmalloc_trav("session closed");
 229 }
 230
 231 static void do_close_req(association *a, int reason, char *message,
 232                          request *req)
 233 {
 234     Z_APDU *apdu = zget_APDU(a->encode, Z_APDU_close);
 235     Z_Close *cls = apdu->u.close;
 236
 237     /* Purge request queue */
 238     while (request_deq(&a->incoming));
 239     while (request_deq(&a->outgoing));
 240     if (a->version >= 3)
 241     {
 242         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 243             reason, message ? message : "none");
 244         *cls->closeReason = reason;
 245         cls->diagnosticInformation = message;
 246         process_z_response(a, req, apdu);
 247         iochan_settimeout(a->client_chan, 20);
 248     }
 249     else
 250     {
 251         request_release(req);
 252         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 253         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 254         a->cs_put_mask = 0;
 255     }
 256     a->state = ASSOC_DEAD;
 257 }
 258
 259 static void do_close(association *a, int reason, char *message)
 260 {
 261     request *req = request_get(&a->outgoing);
 262     do_close_req(a, reason, message, req);
 263 }
 264
 265
 266 int ir_read(IOCHAN h, int event)
 267 {
 268     association *assoc = (association *)iochan_getdata(h);
 269     COMSTACK conn = assoc->client_link;
 270     request *req;
 271
 272     if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 273     {
 274         /* We aren't speaking to this fellow */
 275         if (assoc->state == ASSOC_DEAD)
 276         {
 277             yaz_log(log_session, "Connection closed - end of session");
 278             cs_close(conn);
 279             destroy_association(assoc);
 280             iochan_destroy(h);
 281             return 0;
 282         }
 283         assoc->cs_get_mask = EVENT_INPUT;
 284
 285         do
 286         {
 287             int res = cs_get(conn, &assoc->input_buffer,
 288                              &assoc->input_buffer_len);
 289             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 290             {
 291                 yaz_log(log_session, "Connection error: %s res=%d",
 292                         cs_errmsg(cs_errno(conn)), res);
 293                 req = request_get(&assoc->incoming); /* get a new request */
 294                 do_close_req(assoc, Z_Close_protocolError,
 295                              "Incoming package too large", req);
 296                 return 0;
 297             }
 298             else if (res <= 0)
 299             {
 300                 assoc->state = ASSOC_DEAD;
 301                 yaz_log(log_session, "Connection closed by client");
 302                 return 0;
 303             }
 304             else if (res == 1) /* incomplete read - wait for more  */
 305             {
 306                 if (conn->io_pending & CS_WANT_WRITE)
 307                     assoc->cs_get_mask |= EVENT_OUTPUT;
 308                 iochan_setflag(h, assoc->cs_get_mask);
 309                 return 0;
 310             }
 311             /* we got a complete PDU. Let's decode it */
 312             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 313                     assoc->input_buffer[0] & 0xff,
 314                     assoc->input_buffer[1] & 0xff,
 315                     assoc->input_buffer[2] & 0xff);
 316             req = request_get(&assoc->incoming); /* get a new request */
 317             odr_reset(assoc->decode);
 318             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 319             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 320             {
 321                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 322                         "[near byte %ld] ",
 323                         odr_errmsg(odr_geterror(assoc->decode)),
 324                         odr_getelement(assoc->decode),
 325                         (long) odr_offset(assoc->decode));
 326                 if (assoc->decode->error != OHTTP)
 327                 {
 328                     yaz_log(YLOG_WARN, "PDU dump:");
 329                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 330                     request_release(req);
 331                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 332                 }
 333                 else
 334                 {
 335                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 336                     assoc->state = ASSOC_DEAD;
 337                     process_gdu_response(assoc, req, p);
 338                 }
 339                 return 0;
 340             }
 341             req->request_mem = odr_extract_mem(assoc->decode);
 342             if (assoc->print)
 343             {
 344                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 345                     yaz_log(YLOG_WARN, "ODR print error: %s",
 346                             odr_errmsg(odr_geterror(assoc->print)));
 347                 odr_reset(assoc->print);
 348             }
 349             request_enq(&assoc->incoming, req);
 350         }
 351         while (cs_more(conn));
 352     }
 353     return 1;
 354 }
 355
 356 /*
 357  * This is where PDUs from the client are read and the further
 358  * processing is initiated. Flow of control moves down through the
 359  * various process_* functions below, until the encoded result comes back up
 360  * to the output handler in here.
 361  *
 362  *  h     : the I/O channel that has an outstanding event.
 363  *  event : the current outstanding event.
 364  */
 365 void ir_session(IOCHAN h, int event)
 366 {
 367     int res;
 368     association *assoc = (association *)iochan_getdata(h);
 369     COMSTACK conn = assoc->client_link;
 370     request *req;
 371
 372     assert(h && conn && assoc);
 373     if (event == EVENT_TIMEOUT)
 374     {
 375         if (assoc->state != ASSOC_UP)
 376         {
 377             yaz_log(log_session, "Timeout. Closing connection");
 378             /* do we need to lod this at all */
 379             cs_close(conn);
 380             destroy_association(assoc);
 381             iochan_destroy(h);
 382         }
 383         else
 384         {
 385             yaz_log(log_sessiondetail, "Timeout. Sending Z39.50 Close");
 386             do_close(assoc, Z_Close_lackOfActivity, 0);
 387         }
 388         return;
 389     }
 390     if (event & assoc->cs_accept_mask)
 391     {
 392         if (!cs_accept(conn))
 393         {
 394             yaz_log(YLOG_WARN, "accept failed");
 395             destroy_association(assoc);
 396             iochan_destroy(h);
 397             return;
 398         }
 399         iochan_clearflag(h, EVENT_OUTPUT);
 400         if (conn->io_pending)
 401         {   /* cs_accept didn't complete */
 402             assoc->cs_accept_mask =
 403                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 404                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 405
 406             iochan_setflag(h, assoc->cs_accept_mask);
 407         }
 408         else
 409         {   /* cs_accept completed. Prepare for reading (cs_get) */
 410             assoc->cs_accept_mask = 0;
 411             assoc->cs_get_mask = EVENT_INPUT;
 412             iochan_setflag(h, assoc->cs_get_mask);
 413         }
 414         return;
 415     }
 416     if (event & assoc->cs_get_mask) /* input */
 417     {
 418         if (!ir_read(h, event))
 419             return;
 420         req = request_head(&assoc->incoming);
 421         if (req->state == REQUEST_IDLE)
 422         {
 423             request_deq(&assoc->incoming);
 424             process_gdu_request(assoc, req);
 425         }
 426     }
 427     if (event & assoc->cs_put_mask)
 428     {
 429         request *req = request_head(&assoc->outgoing);
 430
 431         assoc->cs_put_mask = 0;
 432         yaz_log(YLOG_DEBUG, "ir_session (output)");
 433         req->state = REQUEST_PENDING;
 434         switch (res = cs_put(conn, req->response, req->len_response))
 435         {
 436         case -1:
 437             yaz_log(log_sessiondetail, "Connection closed by client");
 438             cs_close(conn);
 439             destroy_association(assoc);
 440             iochan_destroy(h);
 441             break;
 442         case 0: /* all sent - release the request structure */
 443             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 444 #if 0
 445             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 446                     req->response);
 447 #endif
 448             request_deq(&assoc->outgoing);
 449             request_release(req);
 450             if (!request_head(&assoc->outgoing))
 451             {   /* restore mask for cs_get operation ... */
 452                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 453                 iochan_setflag(h, assoc->cs_get_mask);
 454                 if (assoc->state == ASSOC_DEAD)
 455                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 456             }
 457             else
 458             {
 459                 assoc->cs_put_mask = EVENT_OUTPUT;
 460             }
 461             break;
 462         default:
 463             if (conn->io_pending & CS_WANT_WRITE)
 464                 assoc->cs_put_mask |= EVENT_OUTPUT;
 465             if (conn->io_pending & CS_WANT_READ)
 466                 assoc->cs_put_mask |= EVENT_INPUT;
 467             iochan_setflag(h, assoc->cs_put_mask);
 468         }
 469     }
 470     if (event & EVENT_EXCEPT)
 471     {
 472         yaz_log(YLOG_WARN, "ir_session (exception)");
 473         cs_close(conn);
 474         destroy_association(assoc);
 475         iochan_destroy(h);
 476     }
 477 }
 478
 479 static int process_z_request(association *assoc, request *req, char **msg);
 480
 481
 482 static void assoc_init_reset(association *assoc)
 483 {
 484     xfree(assoc->init);
 485     assoc->init = (bend_initrequest *) xmalloc(sizeof(*assoc->init));
 486
 487     assoc->init->stream = assoc->encode;
 488     assoc->init->print = assoc->print;
 489     assoc->init->auth = 0;
 490     assoc->init->referenceId = 0;
 491     assoc->init->implementation_version = 0;
 492     assoc->init->implementation_id = 0;
 493     assoc->init->implementation_name = 0;
 494     assoc->init->query_charset = 0;
 495     assoc->init->records_in_same_charset = 0;
 496     assoc->init->bend_sort = NULL;
 497     assoc->init->bend_search = NULL;
 498     assoc->init->bend_present = NULL;
 499     assoc->init->bend_esrequest = NULL;
 500     assoc->init->bend_delete = NULL;
 501     assoc->init->bend_scan = NULL;
 502     assoc->init->bend_segment = NULL;
 503     assoc->init->bend_fetch = NULL;
 504     assoc->init->bend_explain = NULL;
 505     assoc->init->bend_srw_scan = NULL;
 506     assoc->init->bend_srw_update = NULL;
 507     assoc->init->named_result_sets = 0;
 508
 509     assoc->init->charneg_request = NULL;
 510     assoc->init->charneg_response = NULL;
 511
 512     assoc->init->decode = assoc->decode;
 513     assoc->init->peer_name =
 514         odr_strdup(assoc->encode, cs_addrstr(assoc->client_link));
 515
 516     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 517 }
 518
 519 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 520 {
 521     statserv_options_block *cb = statserv_getcontrol();
 522     if (!assoc->init)
 523     {
 524         const char *encoding = "UTF-8";
 525         Z_External *ce;
 526         bend_initresult *binitres;
 527
 528         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 529         assoc_init_reset(assoc);
 530
 531         if (sr->username)
 532         {
 533             Z_IdAuthentication *auth = (Z_IdAuthentication *)
 534                 odr_malloc(assoc->decode, sizeof(*auth));
 535             size_t len;
 536
 537             len = strlen(sr->username) + 1;
 538             if (sr->password)
 539                 len += strlen(sr->password) + 2;
 540             yaz_log(log_requestdetail, "username=%s password-len=%ld",
 541                     sr->username, (long)
 542                     (sr->password ? strlen(sr->password) : 0));
 543             auth->which = Z_IdAuthentication_open;
 544             auth->u.open = (char *) odr_malloc(assoc->decode, len);
 545             strcpy(auth->u.open, sr->username);
 546             if (sr->password && *sr->password)
 547             {
 548                 strcat(auth->u.open, "/");
 549                 strcat(auth->u.open, sr->password);
 550             }
 551             assoc->init->auth = auth;
 552         }
 553
 554 #if 1
 555         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 556         assoc->init->charneg_request = ce->u.charNeg3;
 557 #endif
 558         assoc->backend = 0;
 559         if (!(binitres = (*cb->bend_init)(assoc->init)))
 560         {
 561             assoc->state = ASSOC_DEAD;
 562             yaz_add_srw_diagnostic(assoc->encode, d, num,
 563                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 564             return 0;
 565         }
 566         assoc->backend = binitres->handle;
 567         assoc->init->auth = 0;
 568         if (binitres->errcode)
 569         {
 570             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 571             assoc->state = ASSOC_DEAD;
 572             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 573                                    binitres->errstring);
 574             return 0;
 575         }
 576         return 1;
 577     }
 578     return 1;
 579 }
 580
 581 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 582 {
 583 #if YAZ_HAVE_XML2
 584     yaz_record_conv_t rc = 0;
 585     const char *match_schema = 0;
 586     Odr_oid *match_syntax = 0;
 587
 588     if (assoc->server)
 589     {
 590         int r;
 591         const char *input_schema = yaz_get_esn(rr->comp);
 592         Odr_oid *input_syntax_raw = rr->request_format;
 593
 594         const char *backend_schema = 0;
 595         Odr_oid *backend_syntax = 0;
 596
 597         r = yaz_retrieval_request(assoc->server->retrieval,
 598                                   input_schema,
 599                                   input_syntax_raw,
 600                                   &match_schema,
 601                                   &match_syntax,
 602                                   &rc,
 603                                   &backend_schema,
 604                                   &backend_syntax);
 605         if (r == -1) /* error ? */
 606         {
 607             const char *details = yaz_retrieval_get_error(
 608                 assoc->server->retrieval);
 609
 610             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 611             if (details)
 612                 rr->errstring = odr_strdup(rr->stream, details);
 613             return -1;
 614         }
 615         else if (r == 1 || r == 3)
 616         {
 617             const char *details = input_schema;
 618             rr->errcode =
 619                 YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
 620             if (details)
 621                 rr->errstring = odr_strdup(rr->stream, details);
 622             return -1;
 623         }
 624         else if (r == 2)
 625         {
 626             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 627             if (input_syntax_raw)
 628             {
 629                 char oidbuf[OID_STR_MAX];
 630                 oid_oid_to_dotstring(input_syntax_raw, oidbuf);
 631                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 632             }
 633             return -1;
 634         }
 635         if (backend_schema)
 636         {
 637             yaz_set_esn(&rr->comp, backend_schema, odr_getmem(rr->stream));
 638         }
 639         if (backend_syntax)
 640             rr->request_format = backend_syntax;
 641     }
 642     (*assoc->init->bend_fetch)(assoc->backend, rr);
 643     if (rc && rr->record && rr->errcode == 0)
 644     {   /* post conversion must take place .. */
 645         WRBUF output_record = wrbuf_alloc();
 646         int r = 1;
 647         const char *details = 0;
 648         if (rr->len > 0)
 649         {
 650             r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 651             if (r)
 652                 details = yaz_record_conv_get_error(rc);
 653         }
 654         else if (rr->len == -1 && rr->output_format &&
 655                  !oid_oidcmp(rr->output_format, yaz_oid_recsyn_opac))
 656         {
 657             r = yaz_record_conv_opac_record(
 658                 rc, (Z_OPACRecord *) rr->record, output_record);
 659             if (r)
 660                 details = yaz_record_conv_get_error(rc);
 661         }
 662         if (r == 0 && match_syntax &&
 663             !oid_oidcmp(match_syntax, yaz_oid_recsyn_opac))
 664         {
 665             yaz_marc_t mt = yaz_marc_create();
 666             Z_OPACRecord *opac = 0;
 667             if (yaz_xml_to_opac(mt, wrbuf_buf(output_record),
 668                                 wrbuf_len(output_record),
 669                                 &opac, 0 /* iconv */, rr->stream->mem, 0)
 670                 && opac)
 671             {
 672                 rr->len = -1;
 673                 rr->record = (char *) opac;
 674             }
 675             else
 676             {
 677                 details = "XML to OPAC conversion failed";
 678                 r = 1;
 679             }
 680             yaz_marc_destroy(mt);
 681         }
 682         else if (r == 0)
 683         {
 684             rr->len = wrbuf_len(output_record);
 685             rr->record = (char *) odr_malloc(rr->stream, rr->len);
 686             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 687         }
 688         if (r)
 689         {
 690             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 691             if (details)
 692                 rr->errstring = odr_strdup(rr->stream, details);
 693         }
 694         wrbuf_destroy(output_record);
 695     }
 696     if (match_syntax)
 697         rr->output_format = match_syntax;
 698     if (match_schema)
 699         rr->schema = odr_strdup(rr->stream, match_schema);
 700 #else
 701     (*assoc->init->bend_fetch)(assoc->backend, rr);
 702 #endif
 703     return 0;
 704 }
 705
 706 static int srw_bend_fetch(association *assoc, int pos,
 707                           Z_SRW_searchRetrieveRequest *srw_req,
 708                           Z_SRW_record *record,
 709                           const char **addinfo, int *last_in_set)
 710 {
 711     bend_fetch_rr rr;
 712     ODR o = assoc->encode;
 713
 714     rr.setname = "default";
 715     rr.number = pos;
 716     rr.referenceId = 0;
 717     rr.request_format = odr_oiddup(assoc->decode, yaz_oid_recsyn_xml);
 718
 719     rr.comp = (Z_RecordComposition *)
 720             odr_malloc(assoc->decode, sizeof(*rr.comp));
 721     rr.comp->which = Z_RecordComp_complex;
 722     rr.comp->u.complex = (Z_CompSpec *)
 723             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 724     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 725         odr_malloc(assoc->encode, sizeof(bool_t));
 726     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 727     rr.comp->u.complex->num_dbSpecific = 0;
 728     rr.comp->u.complex->dbSpecific = 0;
 729     rr.comp->u.complex->num_recordSyntax = 0;
 730     rr.comp->u.complex->recordSyntax = 0;
 731
 732     rr.comp->u.complex->generic = (Z_Specification *)
 733             odr_malloc(assoc->decode, sizeof(Z_Specification));
 734
 735     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 736     rr.comp->u.complex->generic->which = Z_Schema_uri;
 737     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 738
 739     /* ESN = recordSchema if recordSchema is present */
 740     rr.comp->u.complex->generic->elementSpec = 0;
 741     if (srw_req->recordSchema)
 742     {
 743         rr.comp->u.complex->generic->elementSpec =
 744             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 745         rr.comp->u.complex->generic->elementSpec->which =
 746             Z_ElementSpec_elementSetName;
 747         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 748             srw_req->recordSchema;
 749     }
 750
 751     rr.stream = assoc->encode;
 752     rr.print = assoc->print;
 753
 754     rr.basename = 0;
 755     rr.len = 0;
 756     rr.record = 0;
 757     rr.last_in_set = 0;
 758     rr.errcode = 0;
 759     rr.errstring = 0;
 760     rr.surrogate_flag = 0;
 761     rr.schema = srw_req->recordSchema;
 762
 763     if (!assoc->init->bend_fetch)
 764         return 1;
 765
 766     retrieve_fetch(assoc, &rr);
 767
 768     *last_in_set = rr.last_in_set;
 769
 770     if (rr.errcode && rr.surrogate_flag)
 771     {
 772         int code = yaz_diag_bib1_to_srw(rr.errcode);
 773         yaz_mk_sru_surrogate(o, record, pos, code, rr.errstring);
 774         return 0;
 775     }
 776     else if (rr.len >= 0)
 777     {
 778         record->recordData_buf = rr.record;
 779         record->recordData_len = rr.len;
 780         record->recordPosition = odr_intdup(o, pos);
 781         record->recordSchema = odr_strdup_null(
 782             o, rr.schema ? rr.schema : srw_req->recordSchema);
 783     }
 784     if (rr.errcode)
 785     {
 786         *addinfo = rr.errstring;
 787         return rr.errcode;
 788     }
 789     return 0;
 790 }
 791
 792 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 793                    Z_Query *query_result, char **sortkeys_p)
 794 {
 795     /* have a CQL query and  CQL to PQF transform .. */
 796     CQL_parser cp = cql_parser_create();
 797     int r;
 798     int srw_errcode = 0;
 799     const char *add = 0;
 800     WRBUF rpn_buf = wrbuf_alloc();
 801
 802     *sortkeys_p = 0;
 803     r = cql_parser_string(cp, cql);
 804     if (r)
 805     {
 806         srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 807     }
 808     if (!r)
 809     {
 810         struct cql_node *cn = cql_parser_result(cp);
 811
 812         /* Syntax OK */
 813         r = cql_transform(ct, cn, wrbuf_vp_puts, rpn_buf);
 814         if (r)
 815             srw_errcode = cql_transform_error(ct, &add);
 816         else
 817         {
 818             char out[100];
 819             int r = cql_sortby_to_sortkeys_buf(cn, out, sizeof(out)-1);
 820
 821             if (r == 0)
 822             {
 823                 if (*out)
 824                     yaz_log(log_requestdetail, "srw_sortKeys '%s'", out);
 825                 *sortkeys_p = odr_strdup(odr, out);
 826             }
 827             else
 828             {
 829                 yaz_log(log_requestdetail, "failed to create srw_sortKeys");
 830                 srw_errcode = YAZ_SRW_UNSUPP_SORT_TYPE;
 831             }
 832         }
 833     }
 834     if (!r)
 835     {
 836         /* Syntax & transform OK. */
 837         /* Convert PQF string to Z39.50 to RPN query struct */
 838         YAZ_PQF_Parser pp = yaz_pqf_create();
 839         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, wrbuf_cstr(rpn_buf));
 840         if (!rpnquery)
 841         {
 842             size_t off;
 843             const char *pqf_msg;
 844             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 845             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 846                     pqf_msg, code);
 847             srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 848         }
 849         else
 850         {
 851             query_result->which = Z_Query_type_1;
 852             query_result->u.type_1 = rpnquery;
 853         }
 854         yaz_pqf_destroy(pp);
 855     }
 856     cql_parser_destroy(cp);
 857     wrbuf_destroy(rpn_buf);
 858     return srw_errcode;
 859 }
 860
 861 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 862                         Z_AttributesPlusTerm *result)
 863 {
 864     Z_Query query;
 865     Z_RPNQuery *rpn;
 866     char *sortkeys = 0;
 867     int srw_error = cql2pqf(odr, cql, ct, &query, &sortkeys);
 868     if (srw_error)
 869         return srw_error;
 870     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 871         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* bad query type */
 872     rpn = query.u.type_1;
 873     if (!rpn->RPNStructure)
 874         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be structure */
 875     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 876         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be simple */
 877     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 878         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be be attributes + term */
 879     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 880            sizeof(*result));
 881     return 0;
 882 }
 883
 884
 885 static int ccl2pqf(ODR odr, const Odr_oct *ccl, CCL_bibset bibset,
 886                    bend_search_rr *bsrr)
 887 {
 888     char *ccl0;
 889     struct ccl_rpn_node *node;
 890     int errcode, pos;
 891
 892     ccl0 = odr_strdupn(odr, (char*) ccl->buf, ccl->len);
 893     if ((node = ccl_find_str(bibset, ccl0, &errcode, &pos)) == 0)
 894     {
 895         bsrr->errstring = (char*) ccl_err_msg(errcode);
 896         return YAZ_SRW_QUERY_SYNTAX_ERROR;    /* Query syntax error */
 897     }
 898
 899     bsrr->query->which = Z_Query_type_1;
 900     bsrr->query->u.type_1 = ccl_rpn_query(odr, node);
 901     return 0;
 902 }
 903
 904 static void srw_bend_search(association *assoc,
 905                             Z_SRW_PDU *sr,
 906                             Z_SRW_PDU *res,
 907                             int *http_code)
 908 {
 909     Z_SRW_searchRetrieveResponse *srw_res = res->u.response;
 910     int srw_error = 0;
 911     Z_External *ext;
 912     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 913
 914     *http_code = 200;
 915     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 916     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 917     if (srw_res->num_diagnostics == 0 && assoc->init)
 918     {
 919         bend_search_rr rr;
 920         rr.setname = "default";
 921         rr.replace_set = 1;
 922         rr.num_bases = 1;
 923         rr.basenames = &srw_req->database;
 924         rr.referenceId = 0;
 925         rr.srw_sortKeys = 0;
 926         rr.srw_setname = 0;
 927         rr.srw_setnameIdleTime = 0;
 928         rr.estimated_hit_count = 0;
 929         rr.partial_resultset = 0;
 930         rr.query = (Z_Query *) odr_malloc(assoc->decode, sizeof(*rr.query));
 931         rr.query->u.type_1 = 0;
 932         rr.extra_args = sr->extra_args;
 933         rr.extra_response_data = 0;
 934         rr.present_number = srw_req->maximumRecords ?
 935             *srw_req->maximumRecords : 0;
 936
 937         if (!srw_req->queryType || !strcmp(srw_req->queryType, "cql"))
 938         {
 939             if (assoc->server && assoc->server->cql_transform)
 940             {
 941                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query,
 942                                           assoc->server->cql_transform,
 943                                           rr.query,
 944                                           &rr.srw_sortKeys);
 945
 946                 if (srw_errcode)
 947                 {
 948                     yaz_add_srw_diagnostic(assoc->encode,
 949                                            &srw_res->diagnostics,
 950                                            &srw_res->num_diagnostics,
 951                                            srw_errcode, 0);
 952                 }
 953             }
 954             else
 955             {
 956                 /* CQL query to backend. Wrap it - Z39.50 style */
 957                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 958                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 959                                                         "1.2.840.10003.16.2");
 960                 ext->indirect_reference = 0;
 961                 ext->descriptor = 0;
 962                 ext->which = Z_External_CQL;
 963                 ext->u.cql = srw_req->query;
 964
 965                 rr.query->which = Z_Query_type_104;
 966                 rr.query->u.type_104 =  ext;
 967             }
 968         }
 969         else if (!strcmp(srw_req->queryType, "pqf"))
 970         {
 971             Z_RPNQuery *RPNquery;
 972             YAZ_PQF_Parser pqf_parser;
 973
 974             pqf_parser = yaz_pqf_create();
 975
 976             RPNquery = yaz_pqf_parse(pqf_parser, assoc->decode, srw_req->query);
 977             if (!RPNquery)
 978             {
 979                 const char *pqf_msg;
 980                 size_t off;
 981                 int code = yaz_pqf_error(pqf_parser, &pqf_msg, &off);
 982                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 983                         code, pqf_msg, (long) off);
 984                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 985             }
 986
 987             rr.query->which = Z_Query_type_1;
 988             rr.query->u.type_1 =  RPNquery;
 989
 990             yaz_pqf_destroy(pqf_parser);
 991         }
 992         else
 993         {
 994             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 995                                    &srw_res->num_diagnostics,
 996                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 997         }
 998         if (rr.query->u.type_1)
 999         {
1000             rr.stream = assoc->encode;
1001             rr.decode = assoc->decode;
1002             rr.print = assoc->print;
1003             if (srw_req->sort.sortKeys)
1004                 rr.srw_sortKeys = odr_strdup(assoc->encode,
1005                                              srw_req->sort.sortKeys);
1006             rr.association = assoc;
1007             rr.hits = 0;
1008             rr.errcode = 0;
1009             rr.errstring = 0;
1010             rr.search_info = 0;
1011             rr.search_input = 0;
1012
1013             if (srw_req->facetList)
1014                 yaz_oi_set_facetlist(&rr.search_input, assoc->encode,
1015                                      srw_req->facetList);
1016
1017             yaz_log_zquery_level(log_requestdetail,rr.query);
1018
1019             (assoc->init->bend_search)(assoc->backend, &rr);
1020             if (rr.errcode)
1021             {
1022                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1023                 {
1024                     *http_code = 404;
1025                 }
1026                 else
1027                 {
1028                     srw_error = yaz_diag_bib1_to_srw(rr.errcode);
1029                     yaz_add_srw_diagnostic(assoc->encode,
1030                                            &srw_res->diagnostics,
1031                                            &srw_res->num_diagnostics,
1032                                            srw_error, rr.errstring);
1033                 }
1034             }
1035             else
1036             {
1037                 int number = srw_req->maximumRecords ?
1038                     odr_int_to_int(*srw_req->maximumRecords) : 0;
1039                 int start = srw_req->startRecord ?
1040                     odr_int_to_int(*srw_req->startRecord) : 1;
1041
1042                 yaz_log(log_requestdetail, "Request to pack %d+%d out of "
1043                         ODR_INT_PRINTF,
1044                         start, number, rr.hits);
1045
1046                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
1047                 if (rr.srw_setname)
1048                 {
1049                     srw_res->resultSetId =
1050                         odr_strdup(assoc->encode, rr.srw_setname );
1051                     srw_res->resultSetIdleTime =
1052                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
1053                 }
1054
1055                 srw_res->facetList = yaz_oi_get_facetlist(&rr.search_info);
1056                 if (start > rr.hits || start < 1)
1057                 {
1058                     /* if hits<=0 and start=1 we don't return a diagnostic */
1059                     if (start != 1)
1060                         yaz_add_srw_diagnostic(
1061                             assoc->encode,
1062                             &srw_res->diagnostics, &srw_res->num_diagnostics,
1063                             YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1064                 }
1065                 else if (number > 0)
1066                 {
1067                     int i;
1068                     int ok = 1;
1069                     if (start + number > rr.hits)
1070                         number = odr_int_to_int(rr.hits) - start + 1;
1071
1072                     /* Call bend_present if defined */
1073                     if (assoc->init->bend_present)
1074                     {
1075                         bend_present_rr *bprr = (bend_present_rr*)
1076                             odr_malloc(assoc->decode, sizeof(*bprr));
1077                         bprr->setname = "default";
1078                         bprr->start = start;
1079                         bprr->number = number;
1080                         if (srw_req->recordSchema)
1081                         {
1082                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1083                                                                             sizeof(*bprr->comp));
1084                             bprr->comp->which = Z_RecordComp_simple;
1085                             bprr->comp->u.simple = (Z_ElementSetNames *)
1086                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1087                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1088                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1089                         }
1090                         else
1091                         {
1092                             bprr->comp = 0;
1093                         }
1094                         bprr->stream = assoc->encode;
1095                         bprr->referenceId = 0;
1096                         bprr->print = assoc->print;
1097                         bprr->association = assoc;
1098                         bprr->errcode = 0;
1099                         bprr->errstring = NULL;
1100                         (*assoc->init->bend_present)(assoc->backend, bprr);
1101
1102                         if (bprr->errcode)
1103                         {
1104                             srw_error = yaz_diag_bib1_to_srw(bprr->errcode);
1105                             yaz_add_srw_diagnostic(assoc->encode,
1106                                                    &srw_res->diagnostics,
1107                                                    &srw_res->num_diagnostics,
1108                                                    srw_error, bprr->errstring);
1109                             ok = 0;
1110                         }
1111                     }
1112
1113                     if (ok)
1114                     {
1115                         int j = 0;
1116                         int packing = Z_SRW_recordPacking_string;
1117                         if (srw_req->recordPacking)
1118                         {
1119                             packing =
1120                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1121                             if (packing == -1)
1122                                 packing = Z_SRW_recordPacking_string;
1123                         }
1124                         srw_res->records = (Z_SRW_record *)
1125                             odr_malloc(assoc->encode,
1126                                        number * sizeof(*srw_res->records));
1127
1128                         srw_res->extra_records = (Z_SRW_extra_record **)
1129                             odr_malloc(assoc->encode,
1130                                        number*sizeof(*srw_res->extra_records));
1131
1132                         for (i = 0; i<number; i++)
1133                         {
1134                             int errcode;
1135                             int last_in_set = 0;
1136                             const char *addinfo = 0;
1137
1138                             srw_res->records[j].recordPacking = packing;
1139                             srw_res->records[j].recordData_buf = 0;
1140                             srw_res->extra_records[j] = 0;
1141                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1142                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1143                                                      srw_res->records + j,
1144                                                      &addinfo, &last_in_set);
1145                             if (errcode)
1146                             {
1147                                 yaz_add_srw_diagnostic(assoc->encode,
1148                                                        &srw_res->diagnostics,
1149                                                        &srw_res->num_diagnostics,
1150                                                        yaz_diag_bib1_to_srw(errcode),
1151                                                        addinfo);
1152
1153                                 break;
1154                             }
1155                             if (srw_res->records[j].recordData_buf)
1156                                 j++;
1157                             if (last_in_set)
1158                                 break;
1159                         }
1160                         srw_res->num_records = j;
1161                         if (!j)
1162                             srw_res->records = 0;
1163                     }
1164                 }
1165                 if (rr.extra_response_data)
1166                 {
1167                     res->extraResponseData_buf = rr.extra_response_data;
1168                     res->extraResponseData_len = strlen(rr.extra_response_data);
1169                 }
1170                 if (strcmp(res->srw_version, "2.") > 0)
1171                 {
1172                     if (rr.estimated_hit_count)
1173                         srw_res->resultCountPrecision =
1174                             odr_strdup(assoc->encode, "estimate");
1175                     else if (rr.partial_resultset)
1176                         srw_res->resultCountPrecision =
1177                             odr_strdup(assoc->encode, "minimum");
1178                     else
1179                         srw_res->resultCountPrecision =
1180                             odr_strdup(assoc->encode, "exact");
1181                 }
1182                 else if (rr.estimated_hit_count || rr.partial_resultset)
1183                 {
1184                     yaz_add_srw_diagnostic(
1185                         assoc->encode,
1186                         &srw_res->diagnostics,
1187                         &srw_res->num_diagnostics,
1188                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1189                         0);
1190                 }
1191             }
1192         }
1193     }
1194     if (log_request)
1195     {
1196         WRBUF wr = wrbuf_alloc();
1197
1198         wrbuf_printf(wr, "SRWSearch %s ", srw_req->database);
1199         if (srw_res->num_diagnostics)
1200             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1201         else if (*http_code != 200)
1202             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1203         else if (srw_res->numberOfRecords)
1204         {
1205             wrbuf_printf(wr, "OK " ODR_INT_PRINTF,
1206                          (srw_res->numberOfRecords ?
1207                           *srw_res->numberOfRecords : 0));
1208         }
1209         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+%d",
1210                      (srw_res->resultSetId ?
1211                       srw_res->resultSetId : "-"),
1212                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1213                      srw_res->num_records);
1214         yaz_log(log_request, "%s %s: %s", wrbuf_cstr(wr), srw_req->queryType,
1215                 srw_req->query);
1216         wrbuf_destroy(wr);
1217     }
1218 }
1219
1220 static char *srw_bend_explain_default(bend_explain_rr *rr)
1221 {
1222 #if YAZ_HAVE_XML2
1223     xmlNodePtr ptr = (xmlNode *) rr->server_node_ptr;
1224     if (!ptr)
1225         return 0;
1226     for (ptr = ptr->children; ptr; ptr = ptr->next)
1227     {
1228         if (ptr->type != XML_ELEMENT_NODE)
1229             continue;
1230         if (!strcmp((const char *) ptr->name, "explain"))
1231         {
1232             int len;
1233             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1234             xmlChar *buf_out;
1235             char *content;
1236
1237             ptr = xmlCopyNode(ptr, 1);
1238
1239             xmlDocSetRootElement(doc, ptr);
1240
1241             xmlDocDumpMemory(doc, &buf_out, &len);
1242             content = (char*) odr_malloc(rr->stream, 1+len);
1243             memcpy(content, buf_out, len);
1244             content[len] = '\0';
1245
1246             xmlFree(buf_out);
1247             xmlFreeDoc(doc);
1248             rr->explain_buf = content;
1249             return 0;
1250         }
1251     }
1252 #endif
1253     return 0;
1254 }
1255
1256 static void srw_bend_explain(association *assoc,
1257                              Z_SRW_PDU *sr,
1258                              Z_SRW_explainResponse *srw_res,
1259                              int *http_code)
1260 {
1261     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1262     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1263     *http_code = 404;
1264     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1265     if (assoc->init)
1266     {
1267         bend_explain_rr rr;
1268
1269         rr.stream = assoc->encode;
1270         rr.decode = assoc->decode;
1271         rr.print = assoc->print;
1272         rr.explain_buf = 0;
1273         rr.database = srw_req->database;
1274         if (assoc->server)
1275             rr.server_node_ptr = assoc->server->server_node_ptr;
1276         else
1277             rr.server_node_ptr = 0;
1278         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1279         if (assoc->init->bend_explain)
1280             (*assoc->init->bend_explain)(assoc->backend, &rr);
1281         else
1282             srw_bend_explain_default(&rr);
1283
1284         if (rr.explain_buf)
1285         {
1286             int packing = Z_SRW_recordPacking_string;
1287             if (srw_req->recordPacking)
1288             {
1289                 packing =
1290                     yaz_srw_str_to_pack(srw_req->recordPacking);
1291                 if (packing == -1)
1292                     packing = Z_SRW_recordPacking_string;
1293             }
1294             srw_res->record.recordSchema = rr.schema;
1295             srw_res->record.recordPacking = packing;
1296             srw_res->record.recordData_buf = rr.explain_buf;
1297             srw_res->record.recordData_len = strlen(rr.explain_buf);
1298             srw_res->record.recordPosition = 0;
1299             *http_code = 200;
1300         }
1301     }
1302 }
1303
1304 static void srw_bend_scan(association *assoc,
1305                           Z_SRW_PDU *sr,
1306                           Z_SRW_PDU *res,
1307                           int *http_code)
1308 {
1309     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1310     Z_SRW_scanResponse *srw_res = res->u.scan_response;
1311     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1312
1313     *http_code = 200;
1314     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1315     if (srw_res->num_diagnostics == 0 && assoc->init)
1316     {
1317         int step_size = 0;
1318         struct scan_entry *save_entries;
1319
1320         bend_scan_rr *bsrr = (bend_scan_rr *)
1321             odr_malloc(assoc->encode, sizeof(*bsrr));
1322         bsrr->num_bases = 1;
1323         bsrr->basenames = &srw_req->database;
1324
1325         bsrr->num_entries = srw_req->maximumTerms ?
1326             odr_int_to_int(*srw_req->maximumTerms) : 10;
1327         bsrr->term_position = srw_req->responsePosition ?
1328             odr_int_to_int(*srw_req->responsePosition) : 1;
1329
1330         bsrr->errcode = 0;
1331         bsrr->errstring = 0;
1332         bsrr->referenceId = 0;
1333         bsrr->stream = assoc->encode;
1334         bsrr->print = assoc->print;
1335         bsrr->step_size = &step_size;
1336         bsrr->entries = 0;
1337         bsrr->setname = 0;
1338         bsrr->extra_args = sr->extra_args;
1339         bsrr->extra_response_data = 0;
1340
1341         if (bsrr->num_entries > 0)
1342         {
1343             int i;
1344             bsrr->entries = (struct scan_entry *)
1345                 odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1346                            bsrr->num_entries);
1347             for (i = 0; i<bsrr->num_entries; i++)
1348             {
1349                 bsrr->entries[i].term = 0;
1350                 bsrr->entries[i].occurrences = 0;
1351                 bsrr->entries[i].errcode = 0;
1352                 bsrr->entries[i].errstring = 0;
1353                 bsrr->entries[i].display_term = 0;
1354             }
1355         }
1356         save_entries = bsrr->entries;  /* save it so we can compare later */
1357
1358         if (srw_req->queryType && !strcmp(srw_req->queryType, "pqf") &&
1359             assoc->init->bend_scan)
1360         {
1361             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1362
1363             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1364                                       &bsrr->attributeset,
1365                                       srw_req->scanClause);
1366             yaz_pqf_destroy(pqf_parser);
1367             bsrr->scanClause = 0;
1368             ((int (*)(void *, bend_scan_rr *))
1369              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1370         }
1371         else if ((!srw_req->queryType || !strcmp(srw_req->queryType, "cql"))
1372                  && assoc->init->bend_scan && assoc->server
1373                  && assoc->server->cql_transform)
1374         {
1375             int srw_error;
1376             bsrr->scanClause = 0;
1377             bsrr->attributeset = 0;
1378             bsrr->term = (Z_AttributesPlusTerm *)
1379                 odr_malloc(assoc->decode, sizeof(*bsrr->term));
1380             srw_error = cql2pqf_scan(assoc->encode,
1381                                      srw_req->scanClause,
1382                                      assoc->server->cql_transform,
1383                                      bsrr->term);
1384             if (srw_error)
1385                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1386                                        &srw_res->num_diagnostics,
1387                                        srw_error, 0);
1388             else
1389             {
1390                 ((int (*)(void *, bend_scan_rr *))
1391                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1392             }
1393         }
1394         else if ((!srw_req->queryType || !strcmp(srw_req->queryType, "cql"))
1395                  && assoc->init->bend_srw_scan)
1396         {
1397             bsrr->term = 0;
1398             bsrr->attributeset = 0;
1399             bsrr->scanClause = srw_req->scanClause;
1400             ((int (*)(void *, bend_scan_rr *))
1401              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1402         }
1403         else
1404         {
1405             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1406                                    &srw_res->num_diagnostics,
1407                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1408         }
1409         if (bsrr->extra_response_data)
1410         {
1411             res->extraResponseData_buf = bsrr->extra_response_data;
1412             res->extraResponseData_len = strlen(bsrr->extra_response_data);
1413         }
1414         if (bsrr->errcode)
1415         {
1416             int srw_error;
1417             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1418             {
1419                 *http_code = 404;
1420                 return;
1421             }
1422             srw_error = yaz_diag_bib1_to_srw(bsrr->errcode);
1423
1424             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1425                                    &srw_res->num_diagnostics,
1426                                    srw_error, bsrr->errstring);
1427         }
1428         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1429         {
1430             int i;
1431             srw_res->terms = (Z_SRW_scanTerm*)
1432                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1433                            bsrr->num_entries);
1434
1435             srw_res->num_terms =  bsrr->num_entries;
1436             for (i = 0; i<bsrr->num_entries; i++)
1437             {
1438                 Z_SRW_scanTerm *t = srw_res->terms + i;
1439                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1440                 t->numberOfRecords =
1441                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1442                 t->displayTerm = 0;
1443                 if (save_entries == bsrr->entries &&
1444                     bsrr->entries[i].display_term)
1445                 {
1446                     /* the entries was _not_ set by the handler. So it's
1447                        safe to test for new member display_term. It is
1448                        NULL'ed by us.
1449                     */
1450                     t->displayTerm = odr_strdup(assoc->encode,
1451                                                 bsrr->entries[i].display_term);
1452                 }
1453                 t->whereInList = 0;
1454             }
1455         }
1456     }
1457     if (log_request)
1458     {
1459         WRBUF wr = wrbuf_alloc();
1460         wrbuf_printf(wr, "SRWScan %s ", srw_req->database);
1461
1462         if (srw_res->num_diagnostics)
1463             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1464         else if (srw_res->num_terms)
1465             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1466         else
1467             wrbuf_printf(wr, "OK - - ");
1468
1469         wrbuf_printf(wr, ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
1470                      (srw_req->responsePosition ?
1471                       *srw_req->responsePosition : 1),
1472                      (srw_req->maximumTerms ?
1473                       *srw_req->maximumTerms : 1));
1474         /* there is no step size in SRU/W ??? */
1475         wrbuf_printf(wr, "%s: %s ", srw_req->queryType, srw_req->scanClause);
1476         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1477         wrbuf_destroy(wr);
1478     }
1479
1480 }
1481
1482 static void srw_bend_update(association *assoc,
1483                             Z_SRW_PDU *sr,
1484                             Z_SRW_updateResponse *srw_res,
1485                             int *http_code)
1486 {
1487     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1488     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1489     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1490     *http_code = 404;
1491     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1492     if (assoc->init)
1493     {
1494         bend_update_rr rr;
1495         Z_SRW_extra_record *extra = srw_req->extra_record;
1496
1497         rr.stream = assoc->encode;
1498         rr.print = assoc->print;
1499         rr.num_bases = 1;
1500         rr.basenames = &srw_req->database;
1501         rr.operation = srw_req->operation;
1502         rr.operation_status = "failed";
1503         rr.record_id = 0;
1504         rr.record_versions = 0;
1505         rr.num_versions = 0;
1506         rr.record_packing = "string";
1507         rr.record_schema = 0;
1508         rr.record_data = 0;
1509         rr.extra_record_data = 0;
1510         rr.extra_request_data = 0;
1511         rr.extra_response_data = 0;
1512         rr.uri = 0;
1513         rr.message = 0;
1514         rr.details = 0;
1515
1516         *http_code = 200;
1517         if (rr.operation == 0)
1518         {
1519             yaz_add_sru_update_diagnostic(
1520                 assoc->encode, &srw_res->diagnostics,
1521                 &srw_res->num_diagnostics,
1522                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1523                 "action" );
1524             return;
1525         }
1526         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1527         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1528         if (!strcmp( rr.operation, "delete"))
1529         {
1530             if (srw_req->record && !srw_req->record->recordSchema)
1531             {
1532                 rr.record_schema = odr_strdup(
1533                     assoc->encode,
1534                     srw_req->record->recordSchema);
1535             }
1536             if (srw_req->record)
1537             {
1538                 rr.record_data = odr_strdupn(
1539                     assoc->encode,
1540                     srw_req->record->recordData_buf,
1541                     srw_req->record->recordData_len );
1542             }
1543             if (extra && extra->extraRecordData_len)
1544             {
1545                 rr.extra_record_data = odr_strdupn(
1546                     assoc->encode,
1547                     extra->extraRecordData_buf,
1548                     extra->extraRecordData_len );
1549             }
1550             if (srw_req->recordId)
1551                 rr.record_id = srw_req->recordId;
1552             else if (extra && extra->recordIdentifier)
1553                 rr.record_id = extra->recordIdentifier;
1554         }
1555         else if (!strcmp(rr.operation, "replace"))
1556         {
1557             if (srw_req->recordId)
1558                 rr.record_id = srw_req->recordId;
1559             else if (extra && extra->recordIdentifier)
1560                 rr.record_id = extra->recordIdentifier;
1561             else
1562             {
1563                 yaz_add_sru_update_diagnostic(
1564                     assoc->encode, &srw_res->diagnostics,
1565                     &srw_res->num_diagnostics,
1566                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1567                     "recordIdentifier");
1568             }
1569             if (!srw_req->record)
1570             {
1571                 yaz_add_sru_update_diagnostic(
1572                     assoc->encode, &srw_res->diagnostics,
1573                     &srw_res->num_diagnostics,
1574                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1575                     "record");
1576             }
1577             else
1578             {
1579                 if (srw_req->record->recordSchema)
1580                     rr.record_schema = odr_strdup(
1581                         assoc->encode, srw_req->record->recordSchema);
1582                 if (srw_req->record->recordData_len )
1583                 {
1584                     rr.record_data = odr_strdupn(assoc->encode,
1585                                                  srw_req->record->recordData_buf,
1586                                                  srw_req->record->recordData_len );
1587                 }
1588                 else
1589                 {
1590                     yaz_add_sru_update_diagnostic(
1591                         assoc->encode, &srw_res->diagnostics,
1592                         &srw_res->num_diagnostics,
1593                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1594                         "recordData" );
1595                 }
1596             }
1597             if (extra && extra->extraRecordData_len)
1598             {
1599                 rr.extra_record_data = odr_strdupn(
1600                     assoc->encode,
1601                     extra->extraRecordData_buf,
1602                     extra->extraRecordData_len );
1603             }
1604         }
1605         else if (!strcmp(rr.operation, "insert"))
1606         {
1607             if (srw_req->recordId)
1608                 rr.record_id = srw_req->recordId;
1609             else if (extra)
1610                 rr.record_id = extra->recordIdentifier;
1611
1612             if (srw_req->record)
1613             {
1614                 if (srw_req->record->recordSchema)
1615                     rr.record_schema = odr_strdup(
1616                         assoc->encode, srw_req->record->recordSchema);
1617
1618                 if (srw_req->record->recordData_len)
1619                     rr.record_data = odr_strdupn(
1620                         assoc->encode,
1621                         srw_req->record->recordData_buf,
1622                         srw_req->record->recordData_len );
1623             }
1624             if (extra && extra->extraRecordData_len)
1625             {
1626                 rr.extra_record_data = odr_strdupn(
1627                     assoc->encode,
1628                     extra->extraRecordData_buf,
1629                     extra->extraRecordData_len );
1630             }
1631         }
1632         else
1633             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1634                                           &srw_res->num_diagnostics,
1635                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1636                                           rr.operation );
1637
1638         if (srw_req->record)
1639         {
1640             const char *pack_str =
1641                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1642             if (pack_str)
1643                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1644         }
1645
1646         if (srw_req->num_recordVersions)
1647         {
1648             rr.record_versions = srw_req->recordVersions;
1649             rr.num_versions = srw_req->num_recordVersions;
1650         }
1651         if (srw_req->extraRequestData_len)
1652         {
1653             rr.extra_request_data = odr_strdupn(assoc->encode,
1654                                                 srw_req->extraRequestData_buf,
1655                                                 srw_req->extraRequestData_len );
1656         }
1657         if (srw_res->num_diagnostics == 0)
1658         {
1659             if ( assoc->init->bend_srw_update)
1660                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1661             else
1662                 yaz_add_sru_update_diagnostic(
1663                     assoc->encode, &srw_res->diagnostics,
1664                     &srw_res->num_diagnostics,
1665                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1666                     "No Update backend handler");
1667         }
1668
1669         if (rr.uri)
1670             yaz_add_srw_diagnostic_uri(assoc->encode,
1671                                        &srw_res->diagnostics,
1672                                        &srw_res->num_diagnostics,
1673                                        rr.uri,
1674                                        rr.message,
1675                                        rr.details);
1676         srw_res->recordId = rr.record_id;
1677         srw_res->operationStatus = rr.operation_status;
1678         srw_res->recordVersions = rr.record_versions;
1679         srw_res->num_recordVersions = rr.num_versions;
1680         if (srw_res->extraResponseData_len)
1681         {
1682             srw_res->extraResponseData_buf = rr.extra_response_data;
1683             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1684         }
1685         if (srw_res->num_diagnostics == 0 && rr.record_data)
1686         {
1687             srw_res->record = yaz_srw_get_record(assoc->encode);
1688             srw_res->record->recordSchema = rr.record_schema;
1689             if (rr.record_packing)
1690             {
1691                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1692
1693                 if (pack == -1)
1694                 {
1695                     pack = Z_SRW_recordPacking_string;
1696                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1697                             rr.record_packing);
1698                 }
1699                 srw_res->record->recordPacking = pack;
1700             }
1701             srw_res->record->recordData_buf = rr.record_data;
1702             srw_res->record->recordData_len = strlen(rr.record_data);
1703             if (rr.extra_record_data)
1704             {
1705                 Z_SRW_extra_record *ex =
1706                     yaz_srw_get_extra_record(assoc->encode);
1707                 srw_res->extra_record = ex;
1708                 ex->extraRecordData_buf = rr.extra_record_data;
1709                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1710             }
1711         }
1712     }
1713 }
1714
1715 /* check if path is OK (1); BAD (0) */
1716 static int check_path(const char *path)
1717 {
1718     if (*path != '/')
1719         return 0;
1720     if (strstr(path, ".."))
1721         return 0;
1722     return 1;
1723 }
1724
1725 static char *read_file(const char *fname, ODR o, size_t *sz)
1726 {
1727     char *buf;
1728     FILE *inf = fopen(fname, "rb");
1729     if (!inf)
1730         return 0;
1731
1732     fseek(inf, 0L, SEEK_END);
1733     *sz = ftell(inf);
1734     rewind(inf);
1735     buf = (char *) odr_malloc(o, *sz);
1736     if (fread(buf, 1, *sz, inf) != *sz)
1737         yaz_log(YLOG_WARN|YLOG_ERRNO, "short read %s", fname);
1738     fclose(inf);
1739     return buf;
1740 }
1741
1742 static void process_http_request(association *assoc, request *req)
1743 {
1744     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1745     ODR o = assoc->encode;
1746     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1747     Z_SRW_PDU *sr = 0;
1748     Z_SOAP *soap_package = 0;
1749     Z_GDU *p = 0;
1750     char *charset = 0;
1751     Z_HTTP_Response *hres = 0;
1752     int keepalive = 1;
1753     const char *stylesheet = 0; /* for now .. set later */
1754     Z_SRW_diagnostic *diagnostic = 0;
1755     int num_diagnostic = 0;
1756     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1757
1758     yaz_log(log_request, "%s %s HTTP/%s", hreq->method, hreq->path, hreq->version);
1759     if (!control_association(assoc, host, 0))
1760     {
1761         p = z_get_HTTP_Response(o, 404);
1762         r = 1;
1763     }
1764     if (r == 2 && assoc->server && assoc->server->docpath
1765         && hreq->path[0] == '/'
1766         &&
1767         /* check if path is a proper prefix of documentroot */
1768         strncmp(hreq->path+1, assoc->server->docpath,
1769                 strlen(assoc->server->docpath))
1770         == 0)
1771     {
1772         if (!check_path(hreq->path))
1773         {
1774             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1775             p = z_get_HTTP_Response(o, 404);
1776         }
1777         else
1778         {
1779             size_t content_size = 0;
1780             char *content_buf = read_file(hreq->path+1, o, &content_size);
1781             if (!content_buf)
1782             {
1783                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1784                 p = z_get_HTTP_Response(o, 404);
1785             }
1786             else
1787             {
1788                 const char *ctype = 0;
1789                 yaz_mime_types types = yaz_mime_types_create();
1790
1791                 yaz_mime_types_add(types, "xsl", "application/xml");
1792                 yaz_mime_types_add(types, "xml", "application/xml");
1793                 yaz_mime_types_add(types, "css", "text/css");
1794                 yaz_mime_types_add(types, "html", "text/html");
1795                 yaz_mime_types_add(types, "htm", "text/html");
1796                 yaz_mime_types_add(types, "txt", "text/plain");
1797                 yaz_mime_types_add(types, "js", "application/x-javascript");
1798
1799                 yaz_mime_types_add(types, "gif", "image/gif");
1800                 yaz_mime_types_add(types, "png", "image/png");
1801                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1802                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1803
1804                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1805                 if (!ctype)
1806                 {
1807                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1808                     p = z_get_HTTP_Response(o, 404);
1809                 }
1810                 else
1811                 {
1812                     p = z_get_HTTP_Response(o, 200);
1813                     hres = p->u.HTTP_Response;
1814                     hres->content_buf = content_buf;
1815                     hres->content_len = content_size;
1816                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1817                 }
1818                 yaz_mime_types_destroy(types);
1819             }
1820         }
1821         r = 1;
1822     }
1823
1824     if (r == 2)
1825     {
1826         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1827         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1828     }
1829     if (r == 2)  /* not taken */
1830     {
1831         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1832                            &diagnostic, &num_diagnostic);
1833         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1834     }
1835     if (r == 0)  /* decode SRW/SRU OK .. */
1836     {
1837         int http_code = 200;
1838         if (sr->which == Z_SRW_searchRetrieve_request)
1839         {
1840             Z_SRW_PDU *res =
1841                 yaz_srw_get_pdu(assoc->encode, Z_SRW_searchRetrieve_response,
1842                                 sr->srw_version);
1843             stylesheet = sr->u.request->stylesheet;
1844             if (num_diagnostic)
1845             {
1846                 res->u.response->diagnostics = diagnostic;
1847                 res->u.response->num_diagnostics = num_diagnostic;
1848             }
1849             else
1850             {
1851                 srw_bend_search(assoc, sr, res, &http_code);
1852             }
1853             if (http_code == 200)
1854                 soap_package->u.generic->p = res;
1855         }
1856         else if (sr->which == Z_SRW_explain_request)
1857         {
1858             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_explain_response,
1859                                              sr->srw_version);
1860             stylesheet = sr->u.explain_request->stylesheet;
1861             if (num_diagnostic)
1862             {
1863                 res->u.explain_response->diagnostics = diagnostic;
1864                 res->u.explain_response->num_diagnostics = num_diagnostic;
1865             }
1866             srw_bend_explain(assoc, sr, res->u.explain_response, &http_code);
1867             if (http_code == 200)
1868                 soap_package->u.generic->p = res;
1869         }
1870         else if (sr->which == Z_SRW_scan_request)
1871         {
1872             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_scan_response,
1873                                              sr->srw_version);
1874             stylesheet = sr->u.scan_request->stylesheet;
1875             if (num_diagnostic)
1876             {
1877                 res->u.scan_response->diagnostics = diagnostic;
1878                 res->u.scan_response->num_diagnostics = num_diagnostic;
1879             }
1880             srw_bend_scan(assoc, sr, res, &http_code);
1881             if (http_code == 200)
1882                 soap_package->u.generic->p = res;
1883         }
1884         else if (sr->which == Z_SRW_update_request)
1885         {
1886             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_update_response,
1887                                              sr->srw_version);
1888             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1889             if (num_diagnostic)
1890             {
1891                 res->u.update_response->diagnostics = diagnostic;
1892                 res->u.update_response->num_diagnostics = num_diagnostic;
1893             }
1894             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1895             srw_bend_update(assoc, sr, res->u.update_response, &http_code);
1896             if (http_code == 200)
1897                 soap_package->u.generic->p = res;
1898         }
1899         else
1900         {
1901             yaz_log(log_request, "SOAP ERROR");
1902             /* FIXME - what error, what query */
1903             http_code = 500;
1904             z_soap_error(assoc->encode, soap_package,
1905                          "SOAP-ENV:Client", "Bad method", 0);
1906         }
1907         if (http_code == 200 || http_code == 500)
1908         {
1909             static Z_SOAP_Handler soap_handlers[4] = {
1910 #if YAZ_HAVE_XML2
1911                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1912                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1913                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1914 #endif
1915                 {0, 0, 0}
1916             };
1917             char ctype[80];
1918             p = z_get_HTTP_Response(o, 200);
1919             hres = p->u.HTTP_Response;
1920
1921             if (!stylesheet && assoc->server)
1922                 stylesheet = assoc->server->stylesheet;
1923
1924             /* empty stylesheet means NO stylesheet */
1925             if (stylesheet && *stylesheet == '\0')
1926                 stylesheet = 0;
1927
1928             z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1929                                  &hres->content_buf, &hres->content_len,
1930                                  soap_handlers, charset, stylesheet);
1931             hres->code = http_code;
1932
1933             strcpy(ctype, "text/xml");
1934             if (charset && strlen(charset) < sizeof(ctype)-30)
1935             {
1936                 strcat(ctype, "; charset=");
1937                 strcat(ctype, charset);
1938             }
1939             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1940         }
1941         else
1942             p = z_get_HTTP_Response(o, http_code);
1943     }
1944
1945     if (p == 0)
1946         p = z_get_HTTP_Response(o, 500);
1947     hres = p->u.HTTP_Response;
1948     if (!strcmp(hreq->version, "1.0"))
1949     {
1950         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1951         if (v && !strcmp(v, "Keep-Alive"))
1952             keepalive = 1;
1953         else
1954             keepalive = 0;
1955         hres->version = "1.0";
1956     }
1957     else
1958     {
1959         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1960         if (v && !strcmp(v, "close"))
1961             keepalive = 0;
1962         else
1963             keepalive = 1;
1964         hres->version = "1.1";
1965     }
1966     if (!keepalive || !assoc->last_control->keepalive)
1967     {
1968         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1969         assoc->state = ASSOC_DEAD;
1970         assoc->cs_get_mask = 0;
1971     }
1972     else
1973     {
1974         int t;
1975         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1976
1977         if (alive && yaz_isdigit(*(const unsigned char *) alive))
1978             t = atoi(alive);
1979         else
1980             t = 15;
1981         if (t < 0 || t > 3600)
1982             t = 3600;
1983         iochan_settimeout(assoc->client_chan,t);
1984         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1985     }
1986     process_gdu_response(assoc, req, p);
1987 }
1988
1989 static void process_gdu_request(association *assoc, request *req)
1990 {
1991     if (req->gdu_request->which == Z_GDU_Z3950)
1992     {
1993         char *msg = 0;
1994         req->apdu_request = req->gdu_request->u.z3950;
1995         if (process_z_request(assoc, req, &msg) < 0)
1996             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1997     }
1998     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1999         process_http_request(assoc, req);
2000     else
2001     {
2002         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
2003     }
2004 }
2005
2006 /*
2007  * Initiate request processing.
2008  */
2009 static int process_z_request(association *assoc, request *req, char **msg)
2010 {
2011     Z_APDU *res;
2012     int retval;
2013
2014     *msg = "Unknown Error";
2015     assert(req && req->state == REQUEST_IDLE);
2016     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
2017     {
2018         *msg = "Missing InitRequest";
2019         return -1;
2020     }
2021     switch (req->apdu_request->which)
2022     {
2023     case Z_APDU_initRequest:
2024         res = process_initRequest(assoc, req); break;
2025     case Z_APDU_searchRequest:
2026         res = process_searchRequest(assoc, req); break;
2027     case Z_APDU_presentRequest:
2028         res = process_presentRequest(assoc, req); break;
2029     case Z_APDU_scanRequest:
2030         if (assoc->init->bend_scan)
2031             res = process_scanRequest(assoc, req);
2032         else
2033         {
2034             *msg = "Cannot handle Scan APDU";
2035             return -1;
2036         }
2037         break;
2038     case Z_APDU_extendedServicesRequest:
2039         if (assoc->init->bend_esrequest)
2040             res = process_ESRequest(assoc, req);
2041         else
2042         {
2043             *msg = "Cannot handle Extended Services APDU";
2044             return -1;
2045         }
2046         break;
2047     case Z_APDU_sortRequest:
2048         if (assoc->init->bend_sort)
2049             res = process_sortRequest(assoc, req);
2050         else
2051         {
2052             *msg = "Cannot handle Sort APDU";
2053             return -1;
2054         }
2055         break;
2056     case Z_APDU_close:
2057         process_close(assoc, req);
2058         return 0;
2059     case Z_APDU_deleteResultSetRequest:
2060         if (assoc->init->bend_delete)
2061             res = process_deleteRequest(assoc, req);
2062         else
2063         {
2064             *msg = "Cannot handle Delete APDU";
2065             return -1;
2066         }
2067         break;
2068     case Z_APDU_segmentRequest:
2069         if (assoc->init->bend_segment)
2070         {
2071             res = process_segmentRequest(assoc, req);
2072         }
2073         else
2074         {
2075             *msg = "Cannot handle Segment APDU";
2076             return -1;
2077         }
2078         break;
2079     case Z_APDU_triggerResourceControlRequest:
2080         return 0;
2081     default:
2082         *msg = "Bad APDU received";
2083         return -1;
2084     }
2085     if (res)
2086     {
2087         yaz_log(YLOG_DEBUG, "  result immediately available");
2088         retval = process_z_response(assoc, req, res);
2089     }
2090     else
2091     {
2092         yaz_log(YLOG_DEBUG, "  result unavailable");
2093         retval = -1;
2094     }
2095     return retval;
2096 }
2097
2098 /*
2099  * Encode response, and transfer the request structure to the outgoing queue.
2100  */
2101 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2102 {
2103     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2104
2105     if (assoc->print)
2106     {
2107         if (!z_GDU(assoc->print, &res, 0, 0))
2108             yaz_log(YLOG_WARN, "ODR print error: %s",
2109                 odr_errmsg(odr_geterror(assoc->print)));
2110         odr_reset(assoc->print);
2111     }
2112     if (!z_GDU(assoc->encode, &res, 0, 0))
2113     {
2114         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2115                 odr_errmsg(odr_geterror(assoc->decode)),
2116                 odr_getelement(assoc->decode));
2117         return -1;
2118     }
2119     req->response = odr_getbuf(assoc->encode, &req->len_response,
2120         &req->size_response);
2121     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2122     odr_reset(assoc->encode);
2123     req->state = REQUEST_IDLE;
2124     request_enq(&assoc->outgoing, req);
2125     /* turn the work over to the ir_session handler */
2126     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2127     assoc->cs_put_mask = EVENT_OUTPUT;
2128     /* Is there more work to be done? give that to the input handler too */
2129     for (;;)
2130     {
2131         req = request_head(&assoc->incoming);
2132         if (req && req->state == REQUEST_IDLE)
2133         {
2134             request_deq(&assoc->incoming);
2135             process_gdu_request(assoc, req);
2136         }
2137         else
2138             break;
2139     }
2140     return 0;
2141 }
2142
2143 /*
2144  * Encode response, and transfer the request structure to the outgoing queue.
2145  */
2146 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2147 {
2148     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*gres));
2149     gres->which = Z_GDU_Z3950;
2150     gres->u.z3950 = res;
2151
2152     return process_gdu_response(assoc, req, gres);
2153 }
2154
2155 static char *get_vhost(Z_OtherInformation *otherInfo)
2156 {
2157     return yaz_oi_get_string_oid(&otherInfo, yaz_oid_userinfo_proxy, 1, 0);
2158 }
2159
2160 /*
2161  * Handle init request.
2162  * At the moment, we don't check the options
2163  * anywhere else in the code - we just try not to do anything that would
2164  * break a naive client. We'll toss 'em into the association block when
2165  * we need them there.
2166  */
2167 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2168 {
2169     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2170     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2171     Z_InitResponse *resp = apdu->u.initResponse;
2172     bend_initresult *binitres;
2173     char options[140];
2174     statserv_options_block *cb = 0;  /* by default no control for backend */
2175
2176     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2177         cb = statserv_getcontrol();  /* got control block for backend */
2178
2179     if (cb && assoc->backend)
2180         (*cb->bend_close)(assoc->backend);
2181
2182     yaz_log(log_requestdetail, "Got initRequest");
2183     if (req->implementationId)
2184         yaz_log(log_requestdetail, "Id:        %s",
2185                 req->implementationId);
2186     if (req->implementationName)
2187         yaz_log(log_requestdetail, "Name:      %s",
2188                 req->implementationName);
2189     if (req->implementationVersion)
2190         yaz_log(log_requestdetail, "Version:   %s",
2191                 req->implementationVersion);
2192
2193     assoc_init_reset(assoc);
2194
2195     assoc->init->auth = req->idAuthentication;
2196     assoc->init->referenceId = req->referenceId;
2197
2198     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2199     {
2200         Z_CharSetandLanguageNegotiation *negotiation =
2201             yaz_get_charneg_record (req->otherInfo);
2202         if (negotiation &&
2203             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2204             assoc->init->charneg_request = negotiation;
2205     }
2206
2207     /* by default named_result_sets is 0 .. Enable it if client asks for it. */
2208     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2209         assoc->init->named_result_sets = 1;
2210
2211     assoc->backend = 0;
2212     if (cb)
2213     {
2214         if (req->implementationVersion)
2215             yaz_log(log_requestdetail, "Config:    %s",
2216                     cb->configname);
2217
2218         iochan_settimeout(assoc->client_chan, cb->idle_timeout);
2219
2220         /* we have a backend control block, so call that init function */
2221         if (!(binitres = (*cb->bend_init)(assoc->init)))
2222         {
2223             yaz_log(YLOG_WARN, "Bad response from backend.");
2224             return 0;
2225         }
2226         assoc->backend = binitres->handle;
2227     }
2228     else
2229     {
2230         /* no backend. return error */
2231         binitres = (bend_initresult *)
2232             odr_malloc(assoc->encode, sizeof(*binitres));
2233         binitres->errstring = 0;
2234         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2235         iochan_settimeout(assoc->client_chan, 10);
2236     }
2237     if ((assoc->init->bend_sort))
2238         yaz_log(YLOG_DEBUG, "Sort handler installed");
2239     if ((assoc->init->bend_search))
2240         yaz_log(YLOG_DEBUG, "Search handler installed");
2241     if ((assoc->init->bend_present))
2242         yaz_log(YLOG_DEBUG, "Present handler installed");
2243     if ((assoc->init->bend_esrequest))
2244         yaz_log(YLOG_DEBUG, "ESRequest handler installed");
2245     if ((assoc->init->bend_delete))
2246         yaz_log(YLOG_DEBUG, "Delete handler installed");
2247     if ((assoc->init->bend_scan))
2248         yaz_log(YLOG_DEBUG, "Scan handler installed");
2249     if ((assoc->init->bend_segment))
2250         yaz_log(YLOG_DEBUG, "Segment handler installed");
2251
2252     resp->referenceId = req->referenceId;
2253     *options = '\0';
2254     /* let's tell the client what we can do */
2255     if (ODR_MASK_GET(req->options, Z_Options_search))
2256     {
2257         ODR_MASK_SET(resp->options, Z_Options_search);
2258         strcat(options, "srch");
2259     }
2260     if (ODR_MASK_GET(req->options, Z_Options_present))
2261     {
2262         ODR_MASK_SET(resp->options, Z_Options_present);
2263         strcat(options, " prst");
2264     }
2265     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2266         assoc->init->bend_delete)
2267     {
2268         ODR_MASK_SET(resp->options, Z_Options_delSet);
2269         strcat(options, " del");
2270     }
2271     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2272         assoc->init->bend_esrequest)
2273     {
2274         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2275         strcat(options, " extendedServices");
2276     }
2277     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets)
2278         && assoc->init->named_result_sets)
2279     {
2280         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2281         strcat(options, " namedresults");
2282     }
2283     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2284     {
2285         ODR_MASK_SET(resp->options, Z_Options_scan);
2286         strcat(options, " scan");
2287     }
2288     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2289     {
2290         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2291         strcat(options, " concurrop");
2292     }
2293     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2294     {
2295         ODR_MASK_SET(resp->options, Z_Options_sort);
2296         strcat(options, " sort");
2297     }
2298
2299     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2300     {
2301         Z_OtherInformationUnit *p0;
2302
2303         if (!assoc->init->charneg_response)
2304         {
2305             if (assoc->init->query_charset)
2306             {
2307                 assoc->init->charneg_response = yaz_set_response_charneg(
2308                     assoc->encode, assoc->init->query_charset, 0,
2309                     assoc->init->records_in_same_charset);
2310             }
2311             else
2312             {
2313                 yaz_log(YLOG_WARN, "default query_charset not defined by backend");
2314             }
2315         }
2316         if (assoc->init->charneg_response
2317             && (p0=yaz_oi_update(&resp->otherInfo, assoc->encode, NULL, 0, 0)))
2318         {
2319             p0->which = Z_OtherInfo_externallyDefinedInfo;
2320             p0->information.externallyDefinedInfo =
2321                 assoc->init->charneg_response;
2322             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2323             strcat(options, " negotiation");
2324         }
2325     }
2326     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2327         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2328
2329     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2330     {
2331         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2332         assoc->version = 1; /* 1 & 2 are equivalent */
2333     }
2334     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2335     {
2336         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2337         assoc->version = 2;
2338     }
2339     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2340     {
2341         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2342         assoc->version = 3;
2343     }
2344
2345     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2346
2347     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2348         assoc->maximumRecordSize = odr_int_to_int(*req->maximumRecordSize);
2349
2350     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2351         assoc->preferredMessageSize = odr_int_to_int(*req->preferredMessageSize);
2352
2353     resp->preferredMessageSize =
2354         odr_intdup(assoc->encode, assoc->preferredMessageSize);
2355     resp->maximumRecordSize =
2356         odr_intdup(assoc->encode, assoc->maximumRecordSize);
2357
2358     resp->implementationId = odr_prepend(assoc->encode,
2359                 assoc->init->implementation_id,
2360                 resp->implementationId);
2361
2362     resp->implementationVersion = odr_prepend(assoc->encode,
2363                 assoc->init->implementation_version,
2364                 resp->implementationVersion);
2365
2366     resp->implementationName = odr_prepend(assoc->encode,
2367                 assoc->init->implementation_name,
2368                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2369
2370     if (binitres->errcode)
2371     {
2372         assoc->state = ASSOC_DEAD;
2373         resp->userInformationField =
2374             init_diagnostics(assoc->encode, binitres->errcode,
2375                              binitres->errstring);
2376         *resp->result = 0;
2377     }
2378     else
2379         assoc->state = ASSOC_UP;
2380
2381     if (log_request)
2382     {
2383         if (!req->idAuthentication)
2384             yaz_log(log_request, "Auth none");
2385         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2386         {
2387             const char *open = req->idAuthentication->u.open;
2388             const char *slash = strchr(open, '/');
2389             int len;
2390             if (slash)
2391                 len = slash - open;
2392             else
2393                 len = strlen(open);
2394                 yaz_log(log_request, "Auth open %.*s", len, open);
2395         }
2396         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2397         {
2398             const char *user = req->idAuthentication->u.idPass->userId;
2399             const char *group = req->idAuthentication->u.idPass->groupId;
2400             yaz_log(log_request, "Auth idPass %s %s",
2401                     user ? user : "-", group ? group : "-");
2402         }
2403         else if (req->idAuthentication->which
2404                  == Z_IdAuthentication_anonymous)
2405         {
2406             yaz_log(log_request, "Auth anonymous");
2407         }
2408         else
2409         {
2410             yaz_log(log_request, "Auth other");
2411         }
2412     }
2413     if (log_request)
2414     {
2415         WRBUF wr = wrbuf_alloc();
2416         wrbuf_printf(wr, "Init ");
2417         if (binitres->errcode)
2418             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2419         else
2420             wrbuf_printf(wr, "OK -");
2421         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2422                      (req->implementationId ? req->implementationId :"-"),
2423                      (req->implementationName ?
2424                       req->implementationName : "-"),
2425                      (req->implementationVersion ?
2426                       req->implementationVersion : "-")
2427             );
2428         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2429         wrbuf_destroy(wr);
2430     }
2431     return apdu;
2432 }
2433
2434 /*
2435  * Set the specified `errcode' and `errstring' into a UserInfo-1
2436  * external to be returned to the client in accordance with Z35.90
2437  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2438  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2439  */
2440 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2441 {
2442     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2443         addinfo ? " -- " : "", addinfo ? addinfo : "");
2444     return zget_init_diagnostics(odr, error, addinfo);
2445 }
2446
2447 /*
2448  * nonsurrogate diagnostic record.
2449  */
2450 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2451 {
2452     Z_Records *rec = (Z_Records *) odr_malloc(assoc->encode, sizeof(*rec));
2453
2454     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2455             addinfo ? " -- " : "", addinfo ? addinfo : "");
2456
2457     rec->which = Z_Records_NSD;
2458     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2459                                                            error, addinfo);
2460     return rec;
2461 }
2462
2463 /*
2464  * surrogate diagnostic.
2465  */
2466 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2467                                           const char *dbname,
2468                                           int error, const char *addinfo)
2469 {
2470     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2471             addinfo ? " -- " : "", addinfo ? addinfo : "");
2472     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2473 }
2474
2475 static Z_Records *pack_records(association *a, char *setname, Odr_int start,
2476                                Odr_int *num, Z_RecordComposition *comp,
2477                                Odr_int *next, Odr_int *pres,
2478                                Z_ReferenceId *referenceId,
2479                                Odr_oid *oid, int *errcode)
2480 {
2481     int recno, total_length = 0, dumped_records = 0;
2482     int toget = odr_int_to_int(*num);
2483     Z_Records *records =
2484         (Z_Records *) odr_malloc(a->encode, sizeof(*records));
2485     Z_NamePlusRecordList *reclist =
2486         (Z_NamePlusRecordList *) odr_malloc(a->encode, sizeof(*reclist));
2487
2488     records->which = Z_Records_DBOSD;
2489     records->u.databaseOrSurDiagnostics = reclist;
2490     reclist->num_records = 0;
2491
2492     if (toget < 0)
2493         return diagrec(a, YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE, 0);
2494     else if (toget == 0)
2495         reclist->records = odr_nullval();
2496     else
2497         reclist->records = (Z_NamePlusRecord **)
2498             odr_malloc(a->encode, sizeof(*reclist->records) * toget);
2499
2500     *pres = Z_PresentStatus_success;
2501     *num = 0;
2502     *next = 0;
2503
2504     yaz_log(log_requestdetail, "Request to pack " ODR_INT_PRINTF "+%d %s", start, toget, setname);
2505     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2506         a->maximumRecordSize);
2507     for (recno = odr_int_to_int(start); reclist->num_records < toget; recno++)
2508     {
2509         bend_fetch_rr freq;
2510         Z_NamePlusRecord *thisrec;
2511         int this_length = 0;
2512         /*
2513          * we get the number of bytes allocated on the stream before any
2514          * allocation done by the backend - this should give us a reasonable
2515          * idea of the total size of the data so far.
2516          */
2517         total_length = odr_total(a->encode) - dumped_records;
2518         freq.errcode = 0;
2519         freq.errstring = 0;
2520         freq.basename = 0;
2521         freq.len = 0;
2522         freq.record = 0;
2523         freq.last_in_set = 0;
2524         freq.setname = setname;
2525         freq.surrogate_flag = 0;
2526         freq.number = recno;
2527         freq.comp = comp;
2528         freq.request_format = oid;
2529         freq.output_format = 0;
2530         freq.stream = a->encode;
2531         freq.print = a->print;
2532         freq.referenceId = referenceId;
2533         freq.schema = 0;
2534
2535         retrieve_fetch(a, &freq);
2536
2537         *next = freq.last_in_set ? 0 : recno + 1;
2538
2539         if (freq.errcode)
2540         {
2541             if (!freq.surrogate_flag) /* non-surrogate diagnostic i.e. global */
2542             {
2543                 char s[20];
2544                 *pres = Z_PresentStatus_failure;
2545                 /* for 'present request out of range',
2546                    set addinfo to record position if not set */
2547                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2548                                 freq.errstring == 0)
2549                 {
2550                     sprintf(s, "%d", recno);
2551                     freq.errstring = s;
2552                 }
2553                 if (errcode)
2554                     *errcode = freq.errcode;
2555                 return diagrec(a, freq.errcode, freq.errstring);
2556             }
2557             reclist->records[reclist->num_records] =
2558                 surrogatediagrec(a, freq.basename, freq.errcode,
2559                                  freq.errstring);
2560             reclist->num_records++;
2561             continue;
2562         }
2563         if (freq.record == 0)  /* no error and no record ? */
2564         {
2565             *pres = Z_PresentStatus_partial_4;
2566             *next = 0;   /* signal end-of-set and stop */
2567             break;
2568         }
2569         if (freq.len >= 0)
2570             this_length = freq.len;
2571         else
2572             this_length = odr_total(a->encode) - total_length - dumped_records;
2573         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2574             this_length, total_length, dumped_records);
2575         if (a->preferredMessageSize > 0 &&
2576                 this_length + total_length > a->preferredMessageSize)
2577         {
2578             /* record is small enough, really */
2579             if (this_length <= a->preferredMessageSize && recno > start)
2580             {
2581                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2582                 *pres = Z_PresentStatus_partial_2;
2583                 if (*next > 0)
2584                     (*next)--;
2585                 break;
2586             }
2587             /* record can only be fetched by itself */
2588             if (this_length < a->maximumRecordSize)
2589             {
2590                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2591                 if (toget > 1)
2592                 {
2593                     yaz_log(YLOG_DEBUG, "  Dropped it");
2594                     reclist->records[reclist->num_records] =
2595                          surrogatediagrec(
2596                              a, freq.basename,
2597                              YAZ_BIB1_RECORD_EXCEEDS_PREFERRED_MESSAGE_SIZE, 0);
2598                     reclist->num_records++;
2599                     dumped_records += this_length;
2600                     continue;
2601                 }
2602             }
2603             else /* too big entirely */
2604             {
2605                 yaz_log(log_requestdetail, "Record > maxrcdsz "
2606                         "this=%d max=%d",
2607                         this_length, a->maximumRecordSize);
2608                 reclist->records[reclist->num_records] =
2609                     surrogatediagrec(
2610                         a, freq.basename,
2611                         YAZ_BIB1_RECORD_EXCEEDS_MAXIMUM_RECORD_SIZE, 0);
2612                 reclist->num_records++;
2613                 dumped_records += this_length;
2614                 continue;
2615             }
2616         }
2617
2618         if (!(thisrec = (Z_NamePlusRecord *)
2619               odr_malloc(a->encode, sizeof(*thisrec))))
2620             return 0;
2621         thisrec->databaseName = odr_strdup_null(a->encode, freq.basename);
2622         thisrec->which = Z_NamePlusRecord_databaseRecord;
2623
2624         if (!freq.output_format)
2625         {
2626             yaz_log(YLOG_WARN, "bend_fetch output_format not set");
2627             return 0;
2628         }
2629         thisrec->u.databaseRecord = z_ext_record_oid(
2630             a->encode, freq.output_format, freq.record, freq.len);
2631         if (!thisrec->u.databaseRecord)
2632             return 0;
2633         reclist->records[reclist->num_records] = thisrec;
2634         reclist->num_records++;
2635         if (freq.last_in_set)
2636             break;
2637     }
2638     *num = reclist->num_records;
2639     return records;
2640 }
2641
2642 static Z_APDU *process_searchRequest(association *assoc, request *reqb)
2643 {
2644     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2645     bend_search_rr *bsrr =
2646         (bend_search_rr *)nmem_malloc(reqb->request_mem, sizeof(*bsrr));
2647
2648     yaz_log(log_requestdetail, "Got SearchRequest.");
2649     bsrr->association = assoc;
2650     bsrr->referenceId = req->referenceId;
2651     bsrr->srw_sortKeys = 0;
2652     bsrr->srw_setname = 0;
2653     bsrr->srw_setnameIdleTime = 0;
2654     bsrr->estimated_hit_count = 0;
2655     bsrr->partial_resultset = 0;
2656     bsrr->extra_args = 0;
2657     bsrr->extra_response_data = 0;
2658
2659     yaz_log(log_requestdetail, "ResultSet '%s'", req->resultSetName);
2660     if (req->databaseNames)
2661     {
2662         int i;
2663         for (i = 0; i < req->num_databaseNames; i++)
2664             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2665     }
2666
2667     yaz_log_zquery_level(log_requestdetail,req->query);
2668
2669     if (assoc->init->bend_search)
2670     {
2671         bsrr->setname = req->resultSetName;
2672         bsrr->replace_set = *req->replaceIndicator;
2673         bsrr->num_bases = req->num_databaseNames;
2674         bsrr->basenames = req->databaseNames;
2675         bsrr->query = req->query;
2676         bsrr->stream = assoc->encode;
2677         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2678         bsrr->decode = assoc->decode;
2679         bsrr->print = assoc->print;
2680         bsrr->hits = 0;
2681         bsrr->errcode = 0;
2682         bsrr->errstring = NULL;
2683         bsrr->search_info = NULL;
2684         bsrr->search_input = req->otherInfo;
2685         bsrr->present_number = *req->mediumSetPresentNumber;
2686
2687         if (assoc->server && assoc->server->cql_transform
2688             && req->query->which == Z_Query_type_104
2689             && req->query->u.type_104->which == Z_External_CQL)
2690         {
2691             /* have a CQL query and a CQL to PQF transform .. */
2692             int srw_errcode =
2693                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2694                         assoc->server->cql_transform, bsrr->query,
2695                         &bsrr->srw_sortKeys);
2696             if (srw_errcode)
2697                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2698         }
2699
2700         if (assoc->server && assoc->server->ccl_transform
2701             && req->query->which == Z_Query_type_2) /*CCL*/
2702         {
2703             /* have a CCL query and a CCL to PQF transform .. */
2704             int srw_errcode =
2705                 ccl2pqf(bsrr->stream, req->query->u.type_2,
2706                         assoc->server->ccl_transform, bsrr);
2707             if (srw_errcode)
2708                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2709         }
2710
2711         if (!bsrr->errcode)
2712             (assoc->init->bend_search)(assoc->backend, bsrr);
2713     }
2714     else
2715     {
2716         /* FIXME - make a diagnostic for it */
2717         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2718     }
2719     return response_searchRequest(assoc, reqb, bsrr);
2720 }
2721
2722 /*
2723  * Prepare a searchresponse based on the backend results. We probably want
2724  * to look at making the fetching of records nonblocking as well, but
2725  * so far, we'll keep things simple.
2726  * If bsrt is null, that means we're called in response to a communications
2727  * event, and we'll have to get the response for ourselves.
2728  */
2729 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2730                                       bend_search_rr *bsrt)
2731 {
2732     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2733     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2734     Z_SearchResponse *resp = (Z_SearchResponse *)
2735         odr_malloc(assoc->encode, sizeof(*resp));
2736     Odr_int *nulint = odr_intdup(assoc->encode, 0);
2737     Odr_int *next = odr_intdup(assoc->encode, 0);
2738     Odr_int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2739     Odr_int returnedrecs = 0;
2740
2741     apdu->which = Z_APDU_searchResponse;
2742     apdu->u.searchResponse = resp;
2743     resp->referenceId = req->referenceId;
2744     resp->additionalSearchInfo = 0;
2745     resp->otherInfo = 0;
2746     if (!bsrt)
2747     {
2748         yaz_log(YLOG_FATAL, "Bad result from backend");
2749         return 0;
2750     }
2751     else if (bsrt->errcode)
2752     {
2753         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2754         resp->resultCount = nulint;
2755         resp->numberOfRecordsReturned = nulint;
2756         resp->nextResultSetPosition = nulint;
2757         resp->searchStatus = odr_booldup(assoc->encode, 0);
2758         resp->resultSetStatus = none;
2759         resp->presentStatus = 0;
2760     }
2761     else
2762     {
2763         bool_t *sr = odr_booldup(assoc->encode, 1);
2764         Odr_int *toget = odr_intdup(assoc->encode, 0);
2765         Z_RecordComposition comp, *compp = 0;
2766
2767         yaz_log(log_requestdetail, "resultCount: " ODR_INT_PRINTF, bsrt->hits);
2768
2769         resp->records = 0;
2770         resp->resultCount = &bsrt->hits;
2771
2772         comp.which = Z_RecordComp_simple;
2773         /* how many records does the user agent want, then? */
2774         if (bsrt->hits < 0)
2775             *toget = 0;
2776         else if (bsrt->hits <= *req->smallSetUpperBound)
2777         {
2778             *toget = bsrt->hits;
2779             if ((comp.u.simple = req->smallSetElementSetNames))
2780                 compp = &comp;
2781         }
2782         else if (bsrt->hits < *req->largeSetLowerBound)
2783         {
2784             *toget = *req->mediumSetPresentNumber;
2785             if (*toget > bsrt->hits)
2786                 *toget = bsrt->hits;
2787             if ((comp.u.simple = req->mediumSetElementSetNames))
2788                 compp = &comp;
2789         }
2790         else
2791             *toget = 0;
2792
2793         if (*toget && !resp->records)
2794         {
2795             Odr_int *presst = odr_intdup(assoc->encode, 0);
2796             /* Call bend_present if defined */
2797             if (assoc->init->bend_present)
2798             {
2799                 bend_present_rr *bprr = (bend_present_rr *)
2800                     nmem_malloc(reqb->request_mem, sizeof(*bprr));
2801                 bprr->setname = req->resultSetName;
2802                 bprr->start = 1;
2803                 bprr->number = odr_int_to_int(*toget);
2804                 bprr->format = req->preferredRecordSyntax;
2805                 bprr->comp = compp;
2806                 bprr->referenceId = req->referenceId;
2807                 bprr->stream = assoc->encode;
2808                 bprr->print = assoc->print;
2809                 bprr->association = assoc;
2810                 bprr->errcode = 0;
2811                 bprr->errstring = NULL;
2812                 (*assoc->init->bend_present)(assoc->backend, bprr);
2813
2814                 if (bprr->errcode)
2815                 {
2816                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2817                     *resp->presentStatus = Z_PresentStatus_failure;
2818                 }
2819             }
2820
2821             if (!resp->records)
2822                 resp->records = pack_records(
2823                     assoc, req->resultSetName, 1,
2824                     toget, compp, next, presst, req->referenceId,
2825                     req->preferredRecordSyntax, NULL);
2826             if (!resp->records)
2827                 return 0;
2828             resp->numberOfRecordsReturned = toget;
2829             returnedrecs = *toget;
2830             resp->presentStatus = presst;
2831         }
2832         else
2833         {
2834             if (*resp->resultCount)
2835                 *next = 1;
2836             resp->numberOfRecordsReturned = nulint;
2837             resp->presentStatus = 0;
2838         }
2839         resp->nextResultSetPosition = next;
2840         resp->searchStatus = sr;
2841         resp->resultSetStatus = 0;
2842         if (bsrt->estimated_hit_count)
2843         {
2844             resp->resultSetStatus = odr_intdup(assoc->encode,
2845                                                Z_SearchResponse_estimate);
2846         }
2847         else if (bsrt->partial_resultset)
2848         {
2849             resp->resultSetStatus = odr_intdup(assoc->encode,
2850                                                Z_SearchResponse_subset);
2851         }
2852     }
2853     resp->additionalSearchInfo = bsrt->search_info;
2854
2855     if (log_request)
2856     {
2857         int i;
2858         WRBUF wr = wrbuf_alloc();
2859
2860         for (i = 0 ; i < req->num_databaseNames; i++)
2861         {
2862             if (i)
2863                 wrbuf_printf(wr, "+");
2864             wrbuf_puts(wr, req->databaseNames[i]);
2865         }
2866         wrbuf_printf(wr, " ");
2867
2868         if (bsrt->errcode)
2869             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2870         else
2871             wrbuf_printf(wr, "OK " ODR_INT_PRINTF, bsrt->hits);
2872         wrbuf_printf(wr, " %s 1+" ODR_INT_PRINTF " ",
2873                      req->resultSetName, returnedrecs);
2874         yaz_query_to_wrbuf(wr, req->query);
2875
2876         yaz_log(log_request, "Search %s", wrbuf_cstr(wr));
2877         wrbuf_destroy(wr);
2878     }
2879     return apdu;
2880 }
2881
2882 /*
2883  * Maybe we got a little over-friendly when we designed bend_fetch to
2884  * get only one record at a time. Some backends can optimise multiple-record
2885  * fetches, and at any rate, there is some overhead involved in
2886  * all that selecting and hopping around. Problem is, of course, that the
2887  * frontend can't know ahead of time how many records it'll need to
2888  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2889  * is downright lousy as a bulk data transfer protocol.
2890  *
2891  * To start with, we'll do the fetching of records from the backend
2892  * in one operation: To save some trips in and out of the event-handler,
2893  * and to simplify the interface to pack_records. At any rate, asynch
2894  * operation is more fun in operations that have an unpredictable execution
2895  * speed - which is normally more true for search than for present.
2896  */
2897 static Z_APDU *process_presentRequest(association *assoc, request *reqb)
2898 {
2899     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2900     Z_APDU *apdu;
2901     Z_PresentResponse *resp;
2902     Odr_int *next;
2903     Odr_int *num;
2904     int errcode = 0;
2905
2906     yaz_log(log_requestdetail, "Got PresentRequest.");
2907
2908     resp = (Z_PresentResponse *)odr_malloc(assoc->encode, sizeof(*resp));
2909     resp->records = 0;
2910     resp->presentStatus = odr_intdup(assoc->encode, 0);
2911     if (assoc->init->bend_present)
2912     {
2913         bend_present_rr *bprr = (bend_present_rr *)
2914             nmem_malloc(reqb->request_mem, sizeof(*bprr));
2915         bprr->setname = req->resultSetId;
2916         bprr->start = odr_int_to_int(*req->resultSetStartPoint);
2917         bprr->number = odr_int_to_int(*req->numberOfRecordsRequested);
2918         bprr->format = req->preferredRecordSyntax;
2919         bprr->comp = req->recordComposition;
2920         bprr->referenceId = req->referenceId;
2921         bprr->stream = assoc->encode;
2922         bprr->print = assoc->print;
2923         bprr->association = assoc;
2924         bprr->errcode = 0;
2925         bprr->errstring = NULL;
2926         (*assoc->init->bend_present)(assoc->backend, bprr);
2927
2928         if (bprr->errcode)
2929         {
2930             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2931             *resp->presentStatus = Z_PresentStatus_failure;
2932             errcode = bprr->errcode;
2933         }
2934     }
2935     apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2936     next = odr_intdup(assoc->encode, 0);
2937     num = odr_intdup(assoc->encode, 0);
2938
2939     apdu->which = Z_APDU_presentResponse;
2940     apdu->u.presentResponse = resp;
2941     resp->referenceId = req->referenceId;
2942     resp->otherInfo = 0;
2943
2944     if (!resp->records)
2945     {
2946         *num = *req->numberOfRecordsRequested;
2947         resp->records =
2948             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2949                          num, req->recordComposition, next,
2950                          resp->presentStatus,
2951                          req->referenceId, req->preferredRecordSyntax,
2952                          &errcode);
2953     }
2954     if (log_request)
2955     {
2956         WRBUF wr = wrbuf_alloc();
2957         wrbuf_printf(wr, "Present ");
2958
2959         if (*resp->presentStatus == Z_PresentStatus_failure)
2960             wrbuf_printf(wr, "ERROR %d ", errcode);
2961         else if (*resp->presentStatus == Z_PresentStatus_success)
2962             wrbuf_printf(wr, "OK -  ");
2963         else
2964             wrbuf_printf(wr, "Partial " ODR_INT_PRINTF " - ",
2965                          *resp->presentStatus);
2966
2967         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
2968                 req->resultSetId, *req->resultSetStartPoint,
2969                 *req->numberOfRecordsRequested);
2970         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
2971         wrbuf_destroy(wr);
2972     }
2973     if (!resp->records)
2974         return 0;
2975     resp->numberOfRecordsReturned = num;
2976     resp->nextResultSetPosition = next;
2977
2978     return apdu;
2979 }
2980
2981 /*
2982  * Scan was implemented rather in a hurry, and with support for only the basic
2983  * elements of the service in the backend API. Suggestions are welcome.
2984  */
2985 static Z_APDU *process_scanRequest(association *assoc, request *reqb)
2986 {
2987     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2988     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2989     Z_ScanResponse *res = (Z_ScanResponse *)
2990         odr_malloc(assoc->encode, sizeof(*res));
2991     Odr_int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2992     Odr_int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2993     Z_ListEntries *ents = (Z_ListEntries *)
2994         odr_malloc(assoc->encode, sizeof(*ents));
2995     Z_DiagRecs *diagrecs_p = NULL;
2996     bend_scan_rr *bsrr = (bend_scan_rr *)
2997         odr_malloc(assoc->encode, sizeof(*bsrr));
2998     struct scan_entry *save_entries;
2999     int step_size = 0;
3000
3001     yaz_log(log_requestdetail, "Got ScanRequest");
3002
3003     apdu->which = Z_APDU_scanResponse;
3004     apdu->u.scanResponse = res;
3005     res->referenceId = req->referenceId;
3006
3007     /* if step is absent, set it to 0 */
3008     if (req->stepSize)
3009         step_size = odr_int_to_int(*req->stepSize);
3010
3011     res->stepSize = 0;
3012     res->scanStatus = scanStatus;
3013     res->numberOfEntriesReturned = numberOfEntriesReturned;
3014     res->positionOfTerm = 0;
3015     res->entries = ents;
3016     ents->num_entries = 0;
3017     ents->entries = NULL;
3018     ents->num_nonsurrogateDiagnostics = 0;
3019     ents->nonsurrogateDiagnostics = NULL;
3020     res->attributeSet = 0;
3021     res->otherInfo = 0;
3022
3023     if (req->databaseNames)
3024     {
3025         int i;
3026         for (i = 0; i < req->num_databaseNames; i++)
3027             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
3028     }
3029     bsrr->scanClause = 0;
3030     bsrr->errcode = 0;
3031     bsrr->errstring = 0;
3032     bsrr->num_bases = req->num_databaseNames;
3033     bsrr->basenames = req->databaseNames;
3034     bsrr->num_entries = odr_int_to_int(*req->numberOfTermsRequested);
3035     bsrr->term = req->termListAndStartPoint;
3036     bsrr->referenceId = req->referenceId;
3037     bsrr->stream = assoc->encode;
3038     bsrr->print = assoc->print;
3039     bsrr->step_size = &step_size;
3040     bsrr->setname = yaz_oi_get_string_oid(&req->otherInfo,
3041                                           yaz_oid_userinfo_scan_set, 1, 0);
3042     bsrr->entries = 0;
3043     bsrr->extra_args = 0;
3044     bsrr->extra_response_data = 0;
3045     /* For YAZ 2.0 and earlier it was the backend handler that
3046        initialized entries (member display_term did not exist)
3047        YAZ 2.0 and later sets 'entries'  and initialize all members
3048        including 'display_term'. If YAZ 2.0 or later sees that
3049        entries was modified - we assume that it is an old handler and
3050        that 'display_term' is _not_ set.
3051     */
3052     if (bsrr->num_entries > 0)
3053     {
3054         int i;
3055         bsrr->entries = (struct scan_entry *)
3056             odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3057                        bsrr->num_entries);
3058         for (i = 0; i<bsrr->num_entries; i++)
3059         {
3060             bsrr->entries[i].term = 0;
3061             bsrr->entries[i].occurrences = 0;
3062             bsrr->entries[i].errcode = 0;
3063             bsrr->entries[i].errstring = 0;
3064             bsrr->entries[i].display_term = 0;
3065         }
3066     }
3067     save_entries = bsrr->entries;  /* save it so we can compare later */
3068
3069     bsrr->attributeset = req->attributeSet;
3070     log_scan_term_level(log_requestdetail, req->termListAndStartPoint,
3071                         bsrr->attributeset);
3072     bsrr->term_position = req->preferredPositionInResponse ?
3073         odr_int_to_int(*req->preferredPositionInResponse) : 1;
3074
3075     ((int (*)(void *, bend_scan_rr *))
3076      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3077
3078     if (bsrr->errcode)
3079         diagrecs_p = zget_DiagRecs(assoc->encode,
3080                                    bsrr->errcode, bsrr->errstring);
3081     else
3082     {
3083         int i;
3084         Z_Entry **tab = (Z_Entry **)
3085             odr_malloc(assoc->encode, sizeof(*tab) * bsrr->num_entries);
3086
3087         if (bsrr->status == BEND_SCAN_PARTIAL)
3088             *scanStatus = Z_Scan_partial_5;
3089         else
3090             *scanStatus = Z_Scan_success;
3091         res->stepSize = odr_intdup(assoc->encode, step_size);
3092         ents->entries = tab;
3093         ents->num_entries = bsrr->num_entries;
3094         res->numberOfEntriesReturned = odr_intdup(assoc->encode,
3095                                                    ents->num_entries);
3096         res->positionOfTerm = odr_intdup(assoc->encode, bsrr->term_position);
3097         for (i = 0; i < bsrr->num_entries; i++)
3098         {
3099             Z_Entry *e;
3100             Z_TermInfo *t;
3101
3102             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3103             if (bsrr->entries[i].occurrences >= 0)
3104             {
3105                 e->which = Z_Entry_termInfo;
3106                 e->u.termInfo = t = (Z_TermInfo *)
3107                     odr_malloc(assoc->encode, sizeof(*t));
3108                 t->suggestedAttributes = 0;
3109                 t->displayTerm = 0;
3110                 if (save_entries == bsrr->entries &&
3111                     bsrr->entries[i].display_term)
3112                 {
3113                     /* the entries was _not_ set by the handler. So it's
3114                        safe to test for new member display_term. It is
3115                        NULL'ed by us.
3116                     */
3117                     t->displayTerm = odr_strdup(assoc->encode,
3118                                                 bsrr->entries[i].display_term);
3119                 }
3120                 t->alternativeTerm = 0;
3121                 t->byAttributes = 0;
3122                 t->otherTermInfo = 0;
3123                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3124                 t->term = (Z_Term *)
3125                     odr_malloc(assoc->encode, sizeof(*t->term));
3126                 t->term->which = Z_Term_general;
3127                 t->term->u.general =
3128                     odr_create_Odr_oct(assoc->encode,
3129                                        bsrr->entries[i].term,
3130                                        strlen(bsrr->entries[i].term));
3131                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (" ODR_INT_PRINTF ")", i,
3132                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3133             }
3134             else
3135             {
3136                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3137                                                   bsrr->entries[i].errcode,
3138                                                   bsrr->entries[i].errstring);
3139                 assert(drecs->num_diagRecs == 1);
3140                 e->which = Z_Entry_surrogateDiagnostic;
3141                 assert(drecs->diagRecs[0]);
3142                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3143             }
3144         }
3145     }
3146     if (diagrecs_p)
3147     {
3148         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3149         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3150     }
3151     if (log_request)
3152     {
3153         int i;
3154         WRBUF wr = wrbuf_alloc();
3155         wrbuf_printf(wr, "Scan ");
3156         for (i = 0 ; i < req->num_databaseNames; i++)
3157         {
3158             if (i)
3159                 wrbuf_printf(wr, "+");
3160             wrbuf_puts(wr, req->databaseNames[i]);
3161         }
3162
3163         wrbuf_printf(wr, " ");
3164
3165         if (bsrr->errcode)
3166             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3167         else
3168             wrbuf_printf(wr, "OK");
3169
3170         wrbuf_printf(wr, " " ODR_INT_PRINTF " - " ODR_INT_PRINTF "+"
3171                      ODR_INT_PRINTF "+" ODR_INT_PRINTF,
3172                      res->numberOfEntriesReturned ?
3173                      *res->numberOfEntriesReturned : 0,
3174                      (req->preferredPositionInResponse ?
3175                       *req->preferredPositionInResponse : 1),
3176                      *req->numberOfTermsRequested,
3177                      (res->stepSize ? *res->stepSize : 1));
3178
3179         if (bsrr->setname)
3180             wrbuf_printf(wr, "+%s", bsrr->setname);
3181
3182         wrbuf_printf(wr, " ");
3183         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3184                           bsrr->attributeset);
3185         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3186         wrbuf_destroy(wr);
3187     }
3188     return apdu;
3189 }
3190
3191 static Z_APDU *process_sortRequest(association *assoc, request *reqb)
3192 {
3193     int i;
3194     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3195     Z_SortResponse *res = (Z_SortResponse *)
3196         odr_malloc(assoc->encode, sizeof(*res));
3197     bend_sort_rr *bsrr = (bend_sort_rr *)
3198         odr_malloc(assoc->encode, sizeof(*bsrr));
3199
3200     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3201
3202     yaz_log(log_requestdetail, "Got SortRequest.");
3203
3204     bsrr->num_input_setnames = req->num_inputResultSetNames;
3205     for (i=0;i<req->num_inputResultSetNames;i++)
3206         yaz_log(log_requestdetail, "Input resultset: '%s'",
3207                 req->inputResultSetNames[i]);
3208     bsrr->input_setnames = req->inputResultSetNames;
3209     bsrr->referenceId = req->referenceId;
3210     bsrr->output_setname = req->sortedResultSetName;
3211     yaz_log(log_requestdetail, "Output resultset: '%s'",
3212                 req->sortedResultSetName);
3213     bsrr->sort_sequence = req->sortSequence;
3214        /*FIXME - dump those sequences too */
3215     bsrr->stream = assoc->encode;
3216     bsrr->print = assoc->print;
3217
3218     bsrr->sort_status = Z_SortResponse_failure;
3219     bsrr->errcode = 0;
3220     bsrr->errstring = 0;
3221
3222     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3223
3224     res->referenceId = bsrr->referenceId;
3225     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3226     res->resultSetStatus = 0;
3227     if (bsrr->errcode)
3228     {
3229         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3230                                        bsrr->errcode, bsrr->errstring);
3231         res->diagnostics = dr->diagRecs;
3232         res->num_diagnostics = dr->num_diagRecs;
3233     }
3234     else
3235     {
3236         res->num_diagnostics = 0;
3237         res->diagnostics = 0;
3238     }
3239     res->resultCount = 0;
3240     res->otherInfo = 0;
3241
3242     apdu->which = Z_APDU_sortResponse;
3243     apdu->u.sortResponse = res;
3244     if (log_request)
3245     {
3246         WRBUF wr = wrbuf_alloc();
3247         wrbuf_printf(wr, "Sort ");
3248         if (bsrr->errcode)
3249             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3250         else
3251             wrbuf_printf(wr,  "OK -");
3252         wrbuf_printf(wr, " (");
3253         for (i = 0; i<req->num_inputResultSetNames; i++)
3254         {
3255             if (i)
3256                 wrbuf_printf(wr, "+");
3257             wrbuf_puts(wr, req->inputResultSetNames[i]);
3258         }
3259         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3260
3261         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3262         wrbuf_destroy(wr);
3263     }
3264     return apdu;
3265 }
3266
3267 static Z_APDU *process_deleteRequest(association *assoc, request *reqb)
3268 {
3269     int i;
3270     Z_DeleteResultSetRequest *req =
3271         reqb->apdu_request->u.deleteResultSetRequest;
3272     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3273         odr_malloc(assoc->encode, sizeof(*res));
3274     bend_delete_rr *bdrr = (bend_delete_rr *)
3275         odr_malloc(assoc->encode, sizeof(*bdrr));
3276     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3277
3278     yaz_log(log_requestdetail, "Got DeleteRequest.");
3279
3280     bdrr->num_setnames = req->num_resultSetList;
3281     bdrr->setnames = req->resultSetList;
3282     for (i = 0; i<req->num_resultSetList; i++)
3283         yaz_log(log_requestdetail, "resultset: '%s'",
3284                 req->resultSetList[i]);
3285     bdrr->stream = assoc->encode;
3286     bdrr->print = assoc->print;
3287     bdrr->function = odr_int_to_int(*req->deleteFunction);
3288     bdrr->referenceId = req->referenceId;
3289     bdrr->statuses = 0;
3290     if (bdrr->num_setnames > 0)
3291     {
3292         bdrr->statuses = (int*)
3293             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3294                        bdrr->num_setnames);
3295         for (i = 0; i < bdrr->num_setnames; i++)
3296             bdrr->statuses[i] = 0;
3297     }
3298     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3299
3300     res->referenceId = req->referenceId;
3301
3302     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3303
3304     res->deleteListStatuses = 0;
3305     if (bdrr->num_setnames > 0)
3306     {
3307         int i;
3308         res->deleteListStatuses = (Z_ListStatuses *)
3309             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3310         res->deleteListStatuses->num = bdrr->num_setnames;
3311         res->deleteListStatuses->elements =
3312             (Z_ListStatus **)
3313             odr_malloc(assoc->encode,
3314                         sizeof(*res->deleteListStatuses->elements) *
3315                         bdrr->num_setnames);
3316         for (i = 0; i<bdrr->num_setnames; i++)
3317         {
3318             res->deleteListStatuses->elements[i] =
3319                 (Z_ListStatus *)
3320                 odr_malloc(assoc->encode,
3321                             sizeof(**res->deleteListStatuses->elements));
3322             res->deleteListStatuses->elements[i]->status =
3323                 odr_intdup(assoc->encode, bdrr->statuses[i]);
3324             res->deleteListStatuses->elements[i]->id =
3325                 odr_strdup(assoc->encode, bdrr->setnames[i]);
3326         }
3327     }
3328     res->numberNotDeleted = 0;
3329     res->bulkStatuses = 0;
3330     res->deleteMessage = 0;
3331     res->otherInfo = 0;
3332
3333     apdu->which = Z_APDU_deleteResultSetResponse;
3334     apdu->u.deleteResultSetResponse = res;
3335     if (log_request)
3336     {
3337         WRBUF wr = wrbuf_alloc();
3338         wrbuf_printf(wr, "Delete ");
3339         if (bdrr->delete_status)
3340             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3341         else
3342             wrbuf_printf(wr, "OK -");
3343         for (i = 0; i<req->num_resultSetList; i++)
3344             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3345         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3346         wrbuf_destroy(wr);
3347     }
3348     return apdu;
3349 }
3350
3351 static void process_close(association *assoc, request *reqb)
3352 {
3353     Z_Close *req = reqb->apdu_request->u.close;
3354     static char *reasons[] =
3355     {
3356         "finished",
3357         "shutdown",
3358         "systemProblem",
3359         "costLimit",
3360         "resources",
3361         "securityViolation",
3362         "protocolError",
3363         "lackOfActivity",
3364         "peerAbort",
3365         "unspecified"
3366     };
3367
3368     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3369         reasons[*req->closeReason], req->diagnosticInformation ?
3370         req->diagnosticInformation : "NULL");
3371     if (assoc->version < 3) /* to make do_force respond with close */
3372         assoc->version = 3;
3373     do_close_req(assoc, Z_Close_finished,
3374                  "Association terminated by client", reqb);
3375     yaz_log(log_request,"Close OK");
3376 }
3377
3378 static Z_APDU *process_segmentRequest(association *assoc, request *reqb)
3379 {
3380     bend_segment_rr req;
3381
3382     req.segment = reqb->apdu_request->u.segmentRequest;
3383     req.stream = assoc->encode;
3384     req.decode = assoc->decode;
3385     req.print = assoc->print;
3386     req.association = assoc;
3387
3388     (*assoc->init->bend_segment)(assoc->backend, &req);
3389
3390     return 0;
3391 }
3392
3393 static Z_APDU *process_ESRequest(association *assoc, request *reqb)
3394 {
3395     bend_esrequest_rr esrequest;
3396     const char *ext_name = "unknown";
3397
3398     Z_ExtendedServicesRequest *req =
3399         reqb->apdu_request->u.extendedServicesRequest;
3400     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3401
3402     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3403
3404     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3405     esrequest.stream = assoc->encode;
3406     esrequest.decode = assoc->decode;
3407     esrequest.print = assoc->print;
3408     esrequest.errcode = 0;
3409     esrequest.errstring = NULL;
3410     esrequest.association = assoc;
3411     esrequest.taskPackage = 0;
3412     esrequest.referenceId = req->referenceId;
3413
3414     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3415     {
3416         switch(esrequest.esr->taskSpecificParameters->which)
3417         {
3418         case Z_External_itemOrder:
3419             ext_name = "ItemOrder"; break;
3420         case Z_External_update:
3421             ext_name = "Update"; break;
3422         case Z_External_update0:
3423             ext_name = "Update0"; break;
3424         case Z_External_ESAdmin:
3425             ext_name = "Admin"; break;
3426
3427         }
3428     }
3429
3430     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3431
3432     resp->referenceId = req->referenceId;
3433
3434     if (esrequest.errcode == -1)
3435     {
3436         /* Backend service indicates request will be processed */
3437         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3438         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3439     }
3440     else if (esrequest.errcode == 0)
3441     {
3442         /* Backend service indicates request will be processed */
3443         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3444         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3445     }
3446     else
3447     {
3448         Z_DiagRecs *diagRecs =
3449             zget_DiagRecs(assoc->encode, esrequest.errcode,
3450                           esrequest.errstring);
3451         /* Backend indicates error, request will not be processed */
3452         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3453         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3454         resp->num_diagnostics = diagRecs->num_diagRecs;
3455         resp->diagnostics = diagRecs->diagRecs;
3456         if (log_request)
3457         {
3458             WRBUF wr = wrbuf_alloc();
3459             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3460             yaz_log(log_request, "EsRequest %s", wrbuf_cstr(wr) );
3461             wrbuf_destroy(wr);
3462         }
3463
3464     }
3465     /* Do something with the members of bend_extendedservice */
3466     if (esrequest.taskPackage)
3467     {
3468         resp->taskPackage = z_ext_record_oid(
3469             assoc->encode, yaz_oid_recsyn_extended,
3470             (const char *)  esrequest.taskPackage, -1);
3471     }
3472     yaz_log(YLOG_DEBUG,"Send the result apdu");
3473     return apdu;
3474 }
3475
3476 int bend_assoc_is_alive(bend_association assoc)
3477 {
3478     if (assoc->state == ASSOC_DEAD)
3479         return 0; /* already marked as dead. Don't check I/O chan anymore */
3480
3481     return iochan_is_alive(assoc->client_chan);
3482 }
3483
3484
3485 /*
3486  * Local variables:
3487  * c-basic-offset: 4
3488  * c-file-style: "Stroustrup"
3489  * indent-tabs-mode: nil
3490  * End:
3491  * vim: shiftwidth=4 tabstop=8 expandtab
3492  */
3493