src/seshigh.c

   1 /* This file is part of the YAZ toolkit.
   2  * Copyright (C) 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             rr->surrogate_flag = 1;
 692             if (details)
 693                 rr->errstring = odr_strdup(rr->stream, details);
 694         }
 695         wrbuf_destroy(output_record);
 696     }
 697     if (match_syntax)
 698         rr->output_format = match_syntax;
 699     if (match_schema)
 700         rr->schema = odr_strdup(rr->stream, match_schema);
 701 #else
 702     (*assoc->init->bend_fetch)(assoc->backend, rr);
 703 #endif
 704     return 0;
 705 }
 706
 707 static int srw_bend_fetch(association *assoc, int pos,
 708                           Z_SRW_searchRetrieveRequest *srw_req,
 709                           Z_SRW_record *record,
 710                           const char **addinfo, int *last_in_set)
 711 {
 712     bend_fetch_rr rr;
 713     ODR o = assoc->encode;
 714
 715     rr.setname = "default";
 716     rr.number = pos;
 717     rr.referenceId = 0;
 718     rr.request_format = odr_oiddup(assoc->decode, yaz_oid_recsyn_xml);
 719
 720     rr.comp = (Z_RecordComposition *)
 721             odr_malloc(assoc->decode, sizeof(*rr.comp));
 722     rr.comp->which = Z_RecordComp_complex;
 723     rr.comp->u.complex = (Z_CompSpec *)
 724             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 725     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 726         odr_malloc(assoc->encode, sizeof(bool_t));
 727     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 728     rr.comp->u.complex->num_dbSpecific = 0;
 729     rr.comp->u.complex->dbSpecific = 0;
 730     rr.comp->u.complex->num_recordSyntax = 0;
 731     rr.comp->u.complex->recordSyntax = 0;
 732
 733     rr.comp->u.complex->generic = (Z_Specification *)
 734             odr_malloc(assoc->decode, sizeof(Z_Specification));
 735
 736     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 737     rr.comp->u.complex->generic->which = Z_Schema_uri;
 738     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 739
 740     /* ESN = recordSchema if recordSchema is present */
 741     rr.comp->u.complex->generic->elementSpec = 0;
 742     if (srw_req->recordSchema)
 743     {
 744         rr.comp->u.complex->generic->elementSpec =
 745             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 746         rr.comp->u.complex->generic->elementSpec->which =
 747             Z_ElementSpec_elementSetName;
 748         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 749             srw_req->recordSchema;
 750     }
 751
 752     rr.stream = assoc->encode;
 753     rr.print = assoc->print;
 754
 755     rr.basename = 0;
 756     rr.len = 0;
 757     rr.record = 0;
 758     rr.last_in_set = 0;
 759     rr.errcode = 0;
 760     rr.errstring = 0;
 761     rr.surrogate_flag = 0;
 762     rr.schema = srw_req->recordSchema;
 763
 764     if (!assoc->init->bend_fetch)
 765         return 1;
 766
 767     retrieve_fetch(assoc, &rr);
 768
 769     *last_in_set = rr.last_in_set;
 770
 771     if (rr.errcode && rr.surrogate_flag)
 772     {
 773         int code = yaz_diag_bib1_to_srw(rr.errcode);
 774         yaz_mk_sru_surrogate(o, record, pos, code, rr.errstring);
 775         return 0;
 776     }
 777     else if (rr.len >= 0)
 778     {
 779         record->recordData_buf = rr.record;
 780         record->recordData_len = rr.len;
 781         record->recordPosition = odr_intdup(o, pos);
 782         record->recordSchema = odr_strdup_null(
 783             o, rr.schema ? rr.schema : srw_req->recordSchema);
 784     }
 785     if (rr.errcode)
 786     {
 787         *addinfo = rr.errstring;
 788         return rr.errcode;
 789     }
 790     return 0;
 791 }
 792
 793 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 794                    Z_Query *query_result, char **sortkeys_p)
 795 {
 796     /* have a CQL query and  CQL to PQF transform .. */
 797     CQL_parser cp = cql_parser_create();
 798     int r;
 799     int srw_errcode = 0;
 800     const char *add = 0;
 801     WRBUF rpn_buf = wrbuf_alloc();
 802
 803     *sortkeys_p = 0;
 804     r = cql_parser_string(cp, cql);
 805     if (r)
 806     {
 807         srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 808     }
 809     if (!r)
 810     {
 811         struct cql_node *cn = cql_parser_result(cp);
 812
 813         /* Syntax OK */
 814         r = cql_transform(ct, cn, wrbuf_vp_puts, rpn_buf);
 815         if (r)
 816             srw_errcode = cql_transform_error(ct, &add);
 817         else
 818         {
 819             char out[100];
 820             int r = cql_sortby_to_sortkeys_buf(cn, out, sizeof(out)-1);
 821
 822             if (r == 0)
 823             {
 824                 if (*out)
 825                     yaz_log(log_requestdetail, "srw_sortKeys '%s'", out);
 826                 *sortkeys_p = odr_strdup(odr, out);
 827             }
 828             else
 829             {
 830                 yaz_log(log_requestdetail, "failed to create srw_sortKeys");
 831                 srw_errcode = YAZ_SRW_UNSUPP_SORT_TYPE;
 832             }
 833         }
 834     }
 835     if (!r)
 836     {
 837         /* Syntax & transform OK. */
 838         /* Convert PQF string to Z39.50 to RPN query struct */
 839         YAZ_PQF_Parser pp = yaz_pqf_create();
 840         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, wrbuf_cstr(rpn_buf));
 841         if (!rpnquery)
 842         {
 843             size_t off;
 844             const char *pqf_msg;
 845             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 846             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 847                     pqf_msg, code);
 848             srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 849         }
 850         else
 851         {
 852             query_result->which = Z_Query_type_1;
 853             query_result->u.type_1 = rpnquery;
 854         }
 855         yaz_pqf_destroy(pp);
 856     }
 857     cql_parser_destroy(cp);
 858     wrbuf_destroy(rpn_buf);
 859     return srw_errcode;
 860 }
 861
 862 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 863                         Z_AttributesPlusTerm *result)
 864 {
 865     Z_Query query;
 866     Z_RPNQuery *rpn;
 867     char *sortkeys = 0;
 868     int srw_error = cql2pqf(odr, cql, ct, &query, &sortkeys);
 869     if (srw_error)
 870         return srw_error;
 871     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 872         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* bad query type */
 873     rpn = query.u.type_1;
 874     if (!rpn->RPNStructure)
 875         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be structure */
 876     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 877         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be simple */
 878     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 879         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be be attributes + term */
 880     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 881            sizeof(*result));
 882     return 0;
 883 }
 884
 885
 886 static int ccl2pqf(ODR odr, const Odr_oct *ccl, CCL_bibset bibset,
 887                    bend_search_rr *bsrr)
 888 {
 889     char *ccl0;
 890     struct ccl_rpn_node *node;
 891     int errcode, pos;
 892
 893     ccl0 = odr_strdupn(odr, (char*) ccl->buf, ccl->len);
 894     if ((node = ccl_find_str(bibset, ccl0, &errcode, &pos)) == 0)
 895     {
 896         bsrr->errstring = (char*) ccl_err_msg(errcode);
 897         return YAZ_SRW_QUERY_SYNTAX_ERROR;    /* Query syntax error */
 898     }
 899
 900     bsrr->query->which = Z_Query_type_1;
 901     bsrr->query->u.type_1 = ccl_rpn_query(odr, node);
 902     return 0;
 903 }
 904
 905 static void srw_bend_search(association *assoc,
 906                             Z_SRW_PDU *sr,
 907                             Z_SRW_PDU *res,
 908                             int *http_code)
 909 {
 910     Z_SRW_searchRetrieveResponse *srw_res = res->u.response;
 911     int srw_error = 0;
 912     Z_External *ext;
 913     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 914
 915     *http_code = 200;
 916     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 917     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 918     if (srw_res->num_diagnostics == 0 && assoc->init)
 919     {
 920         bend_search_rr rr;
 921         rr.setname = "default";
 922         rr.replace_set = 1;
 923         rr.num_bases = 1;
 924         rr.basenames = &srw_req->database;
 925         rr.referenceId = 0;
 926         rr.srw_sortKeys = 0;
 927         rr.srw_setname = 0;
 928         rr.srw_setnameIdleTime = 0;
 929         rr.estimated_hit_count = 0;
 930         rr.partial_resultset = 0;
 931         rr.query = (Z_Query *) odr_malloc(assoc->decode, sizeof(*rr.query));
 932         rr.query->u.type_1 = 0;
 933         rr.extra_args = sr->extra_args;
 934         rr.extra_response_data = 0;
 935         rr.present_number = srw_req->maximumRecords ?
 936             *srw_req->maximumRecords : 0;
 937
 938         if (!srw_req->queryType || !strcmp(srw_req->queryType, "cql"))
 939         {
 940             if (assoc->server && assoc->server->cql_transform)
 941             {
 942                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query,
 943                                           assoc->server->cql_transform,
 944                                           rr.query,
 945                                           &rr.srw_sortKeys);
 946
 947                 if (srw_errcode)
 948                 {
 949                     yaz_add_srw_diagnostic(assoc->encode,
 950                                            &srw_res->diagnostics,
 951                                            &srw_res->num_diagnostics,
 952                                            srw_errcode, 0);
 953                 }
 954             }
 955             else
 956             {
 957                 /* CQL query to backend. Wrap it - Z39.50 style */
 958                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 959                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 960                                                         "1.2.840.10003.16.2");
 961                 ext->indirect_reference = 0;
 962                 ext->descriptor = 0;
 963                 ext->which = Z_External_CQL;
 964                 ext->u.cql = srw_req->query;
 965
 966                 rr.query->which = Z_Query_type_104;
 967                 rr.query->u.type_104 =  ext;
 968             }
 969         }
 970         else if (!strcmp(srw_req->queryType, "pqf"))
 971         {
 972             Z_RPNQuery *RPNquery;
 973             YAZ_PQF_Parser pqf_parser;
 974
 975             pqf_parser = yaz_pqf_create();
 976
 977             RPNquery = yaz_pqf_parse(pqf_parser, assoc->decode, srw_req->query);
 978             if (!RPNquery)
 979             {
 980                 const char *pqf_msg;
 981                 size_t off;
 982                 int code = yaz_pqf_error(pqf_parser, &pqf_msg, &off);
 983                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 984                         code, pqf_msg, (long) off);
 985                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 986             }
 987
 988             rr.query->which = Z_Query_type_1;
 989             rr.query->u.type_1 =  RPNquery;
 990
 991             yaz_pqf_destroy(pqf_parser);
 992         }
 993         else
 994         {
 995             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 996                                    &srw_res->num_diagnostics,
 997                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 998         }
 999         if (rr.query->u.type_1)
1000         {
1001             rr.stream = assoc->encode;
1002             rr.decode = assoc->decode;
1003             rr.print = assoc->print;
1004             if (srw_req->sort.sortKeys)
1005                 rr.srw_sortKeys = odr_strdup(assoc->encode,
1006                                              srw_req->sort.sortKeys);
1007             rr.association = assoc;
1008             rr.hits = 0;
1009             rr.errcode = 0;
1010             rr.errstring = 0;
1011             rr.search_info = 0;
1012             rr.search_input = 0;
1013
1014             if (srw_req->facetList)
1015                 yaz_oi_set_facetlist(&rr.search_input, assoc->encode,
1016                                      srw_req->facetList);
1017
1018             yaz_log_zquery_level(log_requestdetail,rr.query);
1019
1020             (assoc->init->bend_search)(assoc->backend, &rr);
1021             if (rr.errcode)
1022             {
1023                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1024                 {
1025                     *http_code = 404;
1026                 }
1027                 else
1028                 {
1029                     srw_error = yaz_diag_bib1_to_srw(rr.errcode);
1030                     yaz_add_srw_diagnostic(assoc->encode,
1031                                            &srw_res->diagnostics,
1032                                            &srw_res->num_diagnostics,
1033                                            srw_error, rr.errstring);
1034                 }
1035             }
1036             else
1037             {
1038                 int number = srw_req->maximumRecords ?
1039                     odr_int_to_int(*srw_req->maximumRecords) : 0;
1040                 int start = srw_req->startRecord ?
1041                     odr_int_to_int(*srw_req->startRecord) : 1;
1042
1043                 yaz_log(log_requestdetail, "Request to pack %d+%d out of "
1044                         ODR_INT_PRINTF,
1045                         start, number, rr.hits);
1046
1047                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
1048                 if (rr.srw_setname)
1049                 {
1050                     srw_res->resultSetId =
1051                         odr_strdup(assoc->encode, rr.srw_setname );
1052                     srw_res->resultSetIdleTime =
1053                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
1054                 }
1055
1056                 srw_res->facetList = yaz_oi_get_facetlist(&rr.search_info);
1057                 if (start > rr.hits || start < 1)
1058                 {
1059                     /* if hits<=0 and start=1 we don't return a diagnostic */
1060                     if (start != 1)
1061                         yaz_add_srw_diagnostic(
1062                             assoc->encode,
1063                             &srw_res->diagnostics, &srw_res->num_diagnostics,
1064                             YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1065                 }
1066                 else if (number > 0)
1067                 {
1068                     int i;
1069                     int ok = 1;
1070                     if (start + number > rr.hits)
1071                         number = odr_int_to_int(rr.hits) - start + 1;
1072
1073                     /* Call bend_present if defined */
1074                     if (assoc->init->bend_present)
1075                     {
1076                         bend_present_rr *bprr = (bend_present_rr*)
1077                             odr_malloc(assoc->decode, sizeof(*bprr));
1078                         bprr->setname = "default";
1079                         bprr->start = start;
1080                         bprr->number = number;
1081                         if (srw_req->recordSchema)
1082                         {
1083                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1084                                                                             sizeof(*bprr->comp));
1085                             bprr->comp->which = Z_RecordComp_simple;
1086                             bprr->comp->u.simple = (Z_ElementSetNames *)
1087                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1088                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1089                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1090                         }
1091                         else
1092                         {
1093                             bprr->comp = 0;
1094                         }
1095                         bprr->stream = assoc->encode;
1096                         bprr->referenceId = 0;
1097                         bprr->print = assoc->print;
1098                         bprr->association = assoc;
1099                         bprr->errcode = 0;
1100                         bprr->errstring = NULL;
1101                         (*assoc->init->bend_present)(assoc->backend, bprr);
1102
1103                         if (bprr->errcode)
1104                         {
1105                             srw_error = yaz_diag_bib1_to_srw(bprr->errcode);
1106                             yaz_add_srw_diagnostic(assoc->encode,
1107                                                    &srw_res->diagnostics,
1108                                                    &srw_res->num_diagnostics,
1109                                                    srw_error, bprr->errstring);
1110                             ok = 0;
1111                         }
1112                     }
1113
1114                     if (ok)
1115                     {
1116                         int j = 0;
1117                         int packing = Z_SRW_recordPacking_string;
1118                         if (srw_req->recordPacking)
1119                         {
1120                             packing =
1121                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1122                             if (packing == -1)
1123                                 packing = Z_SRW_recordPacking_string;
1124                         }
1125                         srw_res->records = (Z_SRW_record *)
1126                             odr_malloc(assoc->encode,
1127                                        number * sizeof(*srw_res->records));
1128
1129                         srw_res->extra_records = (Z_SRW_extra_record **)
1130                             odr_malloc(assoc->encode,
1131                                        number*sizeof(*srw_res->extra_records));
1132
1133                         for (i = 0; i<number; i++)
1134                         {
1135                             int errcode;
1136                             int last_in_set = 0;
1137                             const char *addinfo = 0;
1138
1139                             srw_res->records[j].recordPacking = packing;
1140                             srw_res->records[j].recordData_buf = 0;
1141                             srw_res->extra_records[j] = 0;
1142                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1143                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1144                                                      srw_res->records + j,
1145                                                      &addinfo, &last_in_set);
1146                             if (errcode)
1147                             {
1148                                 yaz_add_srw_diagnostic(assoc->encode,
1149                                                        &srw_res->diagnostics,
1150                                                        &srw_res->num_diagnostics,
1151                                                        yaz_diag_bib1_to_srw(errcode),
1152                                                        addinfo);
1153
1154                                 break;
1155                             }
1156                             if (srw_res->records[j].recordData_buf)
1157                                 j++;
1158                             if (last_in_set)
1159                                 break;
1160                         }
1161                         srw_res->num_records = j;
1162                         if (!j)
1163                             srw_res->records = 0;
1164                     }
1165                 }
1166                 if (rr.extra_response_data)
1167                 {
1168                     res->extraResponseData_buf = rr.extra_response_data;
1169                     res->extraResponseData_len = strlen(rr.extra_response_data);
1170                 }
1171                 if (strcmp(res->srw_version, "2.") > 0)
1172                 {
1173                     if (rr.estimated_hit_count)
1174                         srw_res->resultCountPrecision =
1175                             odr_strdup(assoc->encode, "estimate");
1176                     else if (rr.partial_resultset)
1177                         srw_res->resultCountPrecision =
1178                             odr_strdup(assoc->encode, "minimum");
1179                     else
1180                         srw_res->resultCountPrecision =
1181                             odr_strdup(assoc->encode, "exact");
1182                 }
1183                 else if (rr.estimated_hit_count || rr.partial_resultset)
1184                 {
1185                     yaz_add_srw_diagnostic(
1186                         assoc->encode,
1187                         &srw_res->diagnostics,
1188                         &srw_res->num_diagnostics,
1189                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1190                         0);
1191                 }
1192             }
1193         }
1194     }
1195     if (log_request)
1196     {
1197         WRBUF wr = wrbuf_alloc();
1198
1199         wrbuf_printf(wr, "SRWSearch %s ", srw_req->database);
1200         if (srw_res->num_diagnostics)
1201             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1202         else if (*http_code != 200)
1203             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1204         else if (srw_res->numberOfRecords)
1205         {
1206             wrbuf_printf(wr, "OK " ODR_INT_PRINTF,
1207                          (srw_res->numberOfRecords ?
1208                           *srw_res->numberOfRecords : 0));
1209         }
1210         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+%d",
1211                      (srw_res->resultSetId ?
1212                       srw_res->resultSetId : "-"),
1213                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1214                      srw_res->num_records);
1215         yaz_log(log_request, "%s %s: %s", wrbuf_cstr(wr), srw_req->queryType,
1216                 srw_req->query);
1217         wrbuf_destroy(wr);
1218     }
1219 }
1220
1221 static char *srw_bend_explain_default(bend_explain_rr *rr)
1222 {
1223 #if YAZ_HAVE_XML2
1224     xmlNodePtr ptr = (xmlNode *) rr->server_node_ptr;
1225     if (!ptr)
1226         return 0;
1227     for (ptr = ptr->children; ptr; ptr = ptr->next)
1228     {
1229         if (ptr->type != XML_ELEMENT_NODE)
1230             continue;
1231         if (!strcmp((const char *) ptr->name, "explain"))
1232         {
1233             int len;
1234             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1235             xmlChar *buf_out;
1236             char *content;
1237
1238             ptr = xmlCopyNode(ptr, 1);
1239
1240             xmlDocSetRootElement(doc, ptr);
1241
1242             xmlDocDumpMemory(doc, &buf_out, &len);
1243             content = (char*) odr_malloc(rr->stream, 1+len);
1244             memcpy(content, buf_out, len);
1245             content[len] = '\0';
1246
1247             xmlFree(buf_out);
1248             xmlFreeDoc(doc);
1249             rr->explain_buf = content;
1250             return 0;
1251         }
1252     }
1253 #endif
1254     return 0;
1255 }
1256
1257 static void srw_bend_explain(association *assoc,
1258                              Z_SRW_PDU *sr,
1259                              Z_SRW_explainResponse *srw_res,
1260                              int *http_code)
1261 {
1262     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1263     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1264     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1265     if (!assoc->init && srw_res->num_diagnostics == 0)
1266         *http_code = 404;
1267     if (assoc->init)
1268     {
1269         bend_explain_rr rr;
1270
1271         rr.stream = assoc->encode;
1272         rr.decode = assoc->decode;
1273         rr.print = assoc->print;
1274         rr.explain_buf = 0;
1275         rr.database = srw_req->database;
1276         if (assoc->server)
1277             rr.server_node_ptr = assoc->server->server_node_ptr;
1278         else
1279             rr.server_node_ptr = 0;
1280         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1281         if (assoc->init->bend_explain)
1282             (*assoc->init->bend_explain)(assoc->backend, &rr);
1283         else
1284             srw_bend_explain_default(&rr);
1285
1286         if (rr.explain_buf)
1287         {
1288             int packing = Z_SRW_recordPacking_string;
1289             if (srw_req->recordPacking)
1290             {
1291                 packing =
1292                     yaz_srw_str_to_pack(srw_req->recordPacking);
1293                 if (packing == -1)
1294                     packing = Z_SRW_recordPacking_string;
1295             }
1296             srw_res->record.recordSchema = rr.schema;
1297             srw_res->record.recordPacking = packing;
1298             srw_res->record.recordData_buf = rr.explain_buf;
1299             srw_res->record.recordData_len = strlen(rr.explain_buf);
1300             srw_res->record.recordPosition = 0;
1301             *http_code = 200;
1302         }
1303     }
1304 }
1305
1306 static void srw_bend_scan(association *assoc,
1307                           Z_SRW_PDU *sr,
1308                           Z_SRW_PDU *res,
1309                           int *http_code)
1310 {
1311     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1312     Z_SRW_scanResponse *srw_res = res->u.scan_response;
1313     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1314
1315     *http_code = 200;
1316     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1317     if (srw_res->num_diagnostics == 0 && assoc->init)
1318     {
1319         int step_size = 0;
1320         struct scan_entry *save_entries;
1321
1322         bend_scan_rr *bsrr = (bend_scan_rr *)
1323             odr_malloc(assoc->encode, sizeof(*bsrr));
1324         bsrr->num_bases = 1;
1325         bsrr->basenames = &srw_req->database;
1326
1327         bsrr->num_entries = srw_req->maximumTerms ?
1328             odr_int_to_int(*srw_req->maximumTerms) : 10;
1329         bsrr->term_position = srw_req->responsePosition ?
1330             odr_int_to_int(*srw_req->responsePosition) : 1;
1331
1332         bsrr->errcode = 0;
1333         bsrr->errstring = 0;
1334         bsrr->referenceId = 0;
1335         bsrr->stream = assoc->encode;
1336         bsrr->print = assoc->print;
1337         bsrr->step_size = &step_size;
1338         bsrr->entries = 0;
1339         bsrr->setname = 0;
1340         bsrr->extra_args = sr->extra_args;
1341         bsrr->extra_response_data = 0;
1342
1343         if (bsrr->num_entries > 0)
1344         {
1345             int i;
1346             bsrr->entries = (struct scan_entry *)
1347                 odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1348                            bsrr->num_entries);
1349             for (i = 0; i<bsrr->num_entries; i++)
1350             {
1351                 bsrr->entries[i].term = 0;
1352                 bsrr->entries[i].occurrences = 0;
1353                 bsrr->entries[i].errcode = 0;
1354                 bsrr->entries[i].errstring = 0;
1355                 bsrr->entries[i].display_term = 0;
1356             }
1357         }
1358         save_entries = bsrr->entries;  /* save it so we can compare later */
1359
1360         if (srw_req->queryType && !strcmp(srw_req->queryType, "pqf") &&
1361             assoc->init->bend_scan)
1362         {
1363             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1364
1365             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1366                                       &bsrr->attributeset,
1367                                       srw_req->scanClause);
1368             yaz_pqf_destroy(pqf_parser);
1369             bsrr->scanClause = 0;
1370             ((int (*)(void *, bend_scan_rr *))
1371              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1372         }
1373         else if ((!srw_req->queryType || !strcmp(srw_req->queryType, "cql"))
1374                  && assoc->init->bend_scan && assoc->server
1375                  && assoc->server->cql_transform)
1376         {
1377             int srw_error;
1378             bsrr->scanClause = 0;
1379             bsrr->attributeset = 0;
1380             bsrr->term = (Z_AttributesPlusTerm *)
1381                 odr_malloc(assoc->decode, sizeof(*bsrr->term));
1382             srw_error = cql2pqf_scan(assoc->encode,
1383                                      srw_req->scanClause,
1384                                      assoc->server->cql_transform,
1385                                      bsrr->term);
1386             if (srw_error)
1387                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1388                                        &srw_res->num_diagnostics,
1389                                        srw_error, 0);
1390             else
1391             {
1392                 ((int (*)(void *, bend_scan_rr *))
1393                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1394             }
1395         }
1396         else if ((!srw_req->queryType || !strcmp(srw_req->queryType, "cql"))
1397                  && assoc->init->bend_srw_scan)
1398         {
1399             bsrr->term = 0;
1400             bsrr->attributeset = 0;
1401             bsrr->scanClause = srw_req->scanClause;
1402             ((int (*)(void *, bend_scan_rr *))
1403              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1404         }
1405         else
1406         {
1407             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1408                                    &srw_res->num_diagnostics,
1409                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1410         }
1411         if (bsrr->extra_response_data)
1412         {
1413             res->extraResponseData_buf = bsrr->extra_response_data;
1414             res->extraResponseData_len = strlen(bsrr->extra_response_data);
1415         }
1416         if (bsrr->errcode)
1417         {
1418             int srw_error;
1419             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1420             {
1421                 *http_code = 404;
1422                 return;
1423             }
1424             srw_error = yaz_diag_bib1_to_srw(bsrr->errcode);
1425
1426             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1427                                    &srw_res->num_diagnostics,
1428                                    srw_error, bsrr->errstring);
1429         }
1430         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1431         {
1432             int i;
1433             srw_res->terms = (Z_SRW_scanTerm*)
1434                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1435                            bsrr->num_entries);
1436
1437             srw_res->num_terms =  bsrr->num_entries;
1438             for (i = 0; i<bsrr->num_entries; i++)
1439             {
1440                 Z_SRW_scanTerm *t = srw_res->terms + i;
1441                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1442                 t->numberOfRecords =
1443                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1444                 t->displayTerm = 0;
1445                 if (save_entries == bsrr->entries &&
1446                     bsrr->entries[i].display_term)
1447                 {
1448                     /* the entries was _not_ set by the handler. So it's
1449                        safe to test for new member display_term. It is
1450                        NULL'ed by us.
1451                     */
1452                     t->displayTerm = odr_strdup(assoc->encode,
1453                                                 bsrr->entries[i].display_term);
1454                 }
1455                 t->whereInList = 0;
1456             }
1457         }
1458     }
1459     if (log_request)
1460     {
1461         WRBUF wr = wrbuf_alloc();
1462         wrbuf_printf(wr, "SRWScan %s ", srw_req->database);
1463
1464         if (srw_res->num_diagnostics)
1465             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1466         else if (srw_res->num_terms)
1467             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1468         else
1469             wrbuf_printf(wr, "OK - - ");
1470
1471         wrbuf_printf(wr, ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
1472                      (srw_req->responsePosition ?
1473                       *srw_req->responsePosition : 1),
1474                      (srw_req->maximumTerms ?
1475                       *srw_req->maximumTerms : 1));
1476         /* there is no step size in SRU/W ??? */
1477         wrbuf_printf(wr, "%s: %s ", srw_req->queryType, srw_req->scanClause);
1478         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1479         wrbuf_destroy(wr);
1480     }
1481
1482 }
1483
1484 static void srw_bend_update(association *assoc,
1485                             Z_SRW_PDU *sr,
1486                             Z_SRW_updateResponse *srw_res,
1487                             int *http_code)
1488 {
1489     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1490     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1491     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1492     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1493     if (!assoc->init && srw_res->num_diagnostics == 0)
1494         *http_code = 404;
1495     if (assoc->init)
1496     {
1497         bend_update_rr rr;
1498         Z_SRW_extra_record *extra = srw_req->extra_record;
1499
1500         rr.stream = assoc->encode;
1501         rr.print = assoc->print;
1502         rr.num_bases = 1;
1503         rr.basenames = &srw_req->database;
1504         rr.operation = srw_req->operation;
1505         rr.operation_status = "failed";
1506         rr.record_id = 0;
1507         rr.record_versions = 0;
1508         rr.num_versions = 0;
1509         rr.record_packing = "string";
1510         rr.record_schema = 0;
1511         rr.record_data = 0;
1512         rr.extra_record_data = 0;
1513         rr.extra_request_data = 0;
1514         rr.extra_response_data = 0;
1515         rr.uri = 0;
1516         rr.message = 0;
1517         rr.details = 0;
1518
1519         *http_code = 200;
1520         if (rr.operation == 0)
1521         {
1522             yaz_add_sru_update_diagnostic(
1523                 assoc->encode, &srw_res->diagnostics,
1524                 &srw_res->num_diagnostics,
1525                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1526                 "action" );
1527             return;
1528         }
1529         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1530         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1531         if (!strcmp( rr.operation, "delete"))
1532         {
1533             if (srw_req->record && !srw_req->record->recordSchema)
1534             {
1535                 rr.record_schema = odr_strdup(
1536                     assoc->encode,
1537                     srw_req->record->recordSchema);
1538             }
1539             if (srw_req->record)
1540             {
1541                 rr.record_data = odr_strdupn(
1542                     assoc->encode,
1543                     srw_req->record->recordData_buf,
1544                     srw_req->record->recordData_len );
1545             }
1546             if (extra && extra->extraRecordData_len)
1547             {
1548                 rr.extra_record_data = odr_strdupn(
1549                     assoc->encode,
1550                     extra->extraRecordData_buf,
1551                     extra->extraRecordData_len );
1552             }
1553             if (srw_req->recordId)
1554                 rr.record_id = srw_req->recordId;
1555             else if (extra && extra->recordIdentifier)
1556                 rr.record_id = extra->recordIdentifier;
1557         }
1558         else if (!strcmp(rr.operation, "replace"))
1559         {
1560             if (srw_req->recordId)
1561                 rr.record_id = srw_req->recordId;
1562             else if (extra && extra->recordIdentifier)
1563                 rr.record_id = extra->recordIdentifier;
1564             else
1565             {
1566                 yaz_add_sru_update_diagnostic(
1567                     assoc->encode, &srw_res->diagnostics,
1568                     &srw_res->num_diagnostics,
1569                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1570                     "recordIdentifier");
1571             }
1572             if (!srw_req->record)
1573             {
1574                 yaz_add_sru_update_diagnostic(
1575                     assoc->encode, &srw_res->diagnostics,
1576                     &srw_res->num_diagnostics,
1577                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1578                     "record");
1579             }
1580             else
1581             {
1582                 if (srw_req->record->recordSchema)
1583                     rr.record_schema = odr_strdup(
1584                         assoc->encode, srw_req->record->recordSchema);
1585                 if (srw_req->record->recordData_len )
1586                 {
1587                     rr.record_data = odr_strdupn(assoc->encode,
1588                                                  srw_req->record->recordData_buf,
1589                                                  srw_req->record->recordData_len );
1590                 }
1591                 else
1592                 {
1593                     yaz_add_sru_update_diagnostic(
1594                         assoc->encode, &srw_res->diagnostics,
1595                         &srw_res->num_diagnostics,
1596                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1597                         "recordData" );
1598                 }
1599             }
1600             if (extra && extra->extraRecordData_len)
1601             {
1602                 rr.extra_record_data = odr_strdupn(
1603                     assoc->encode,
1604                     extra->extraRecordData_buf,
1605                     extra->extraRecordData_len );
1606             }
1607         }
1608         else if (!strcmp(rr.operation, "insert"))
1609         {
1610             if (srw_req->recordId)
1611                 rr.record_id = srw_req->recordId;
1612             else if (extra)
1613                 rr.record_id = extra->recordIdentifier;
1614
1615             if (srw_req->record)
1616             {
1617                 if (srw_req->record->recordSchema)
1618                     rr.record_schema = odr_strdup(
1619                         assoc->encode, srw_req->record->recordSchema);
1620
1621                 if (srw_req->record->recordData_len)
1622                     rr.record_data = odr_strdupn(
1623                         assoc->encode,
1624                         srw_req->record->recordData_buf,
1625                         srw_req->record->recordData_len );
1626             }
1627             if (extra && extra->extraRecordData_len)
1628             {
1629                 rr.extra_record_data = odr_strdupn(
1630                     assoc->encode,
1631                     extra->extraRecordData_buf,
1632                     extra->extraRecordData_len );
1633             }
1634         }
1635         else
1636             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1637                                           &srw_res->num_diagnostics,
1638                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1639                                           rr.operation );
1640
1641         if (srw_req->record)
1642         {
1643             const char *pack_str =
1644                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1645             if (pack_str)
1646                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1647         }
1648
1649         if (srw_req->num_recordVersions)
1650         {
1651             rr.record_versions = srw_req->recordVersions;
1652             rr.num_versions = srw_req->num_recordVersions;
1653         }
1654         if (srw_req->extraRequestData_len)
1655         {
1656             rr.extra_request_data = odr_strdupn(assoc->encode,
1657                                                 srw_req->extraRequestData_buf,
1658                                                 srw_req->extraRequestData_len );
1659         }
1660         if (srw_res->num_diagnostics == 0)
1661         {
1662             if ( assoc->init->bend_srw_update)
1663                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1664             else
1665                 yaz_add_sru_update_diagnostic(
1666                     assoc->encode, &srw_res->diagnostics,
1667                     &srw_res->num_diagnostics,
1668                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1669                     "No Update backend handler");
1670         }
1671
1672         if (rr.uri)
1673             yaz_add_srw_diagnostic_uri(assoc->encode,
1674                                        &srw_res->diagnostics,
1675                                        &srw_res->num_diagnostics,
1676                                        rr.uri,
1677                                        rr.message,
1678                                        rr.details);
1679         srw_res->recordId = rr.record_id;
1680         srw_res->operationStatus = rr.operation_status;
1681         srw_res->recordVersions = rr.record_versions;
1682         srw_res->num_recordVersions = rr.num_versions;
1683         if (srw_res->extraResponseData_len)
1684         {
1685             srw_res->extraResponseData_buf = rr.extra_response_data;
1686             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1687         }
1688         if (srw_res->num_diagnostics == 0 && rr.record_data)
1689         {
1690             srw_res->record = yaz_srw_get_record(assoc->encode);
1691             srw_res->record->recordSchema = rr.record_schema;
1692             if (rr.record_packing)
1693             {
1694                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1695
1696                 if (pack == -1)
1697                 {
1698                     pack = Z_SRW_recordPacking_string;
1699                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1700                             rr.record_packing);
1701                 }
1702                 srw_res->record->recordPacking = pack;
1703             }
1704             srw_res->record->recordData_buf = rr.record_data;
1705             srw_res->record->recordData_len = strlen(rr.record_data);
1706             if (rr.extra_record_data)
1707             {
1708                 Z_SRW_extra_record *ex =
1709                     yaz_srw_get_extra_record(assoc->encode);
1710                 srw_res->extra_record = ex;
1711                 ex->extraRecordData_buf = rr.extra_record_data;
1712                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1713             }
1714         }
1715     }
1716 }
1717
1718 /* check if path is OK (1); BAD (0) */
1719 static int check_path(const char *path)
1720 {
1721     if (*path != '/')
1722         return 0;
1723     if (strstr(path, ".."))
1724         return 0;
1725     return 1;
1726 }
1727
1728 static char *read_file(const char *fname, ODR o, size_t *sz)
1729 {
1730     char *buf;
1731     FILE *inf = fopen(fname, "rb");
1732     if (!inf)
1733         return 0;
1734
1735     fseek(inf, 0L, SEEK_END);
1736     *sz = ftell(inf);
1737     rewind(inf);
1738     buf = (char *) odr_malloc(o, *sz);
1739     if (fread(buf, 1, *sz, inf) != *sz)
1740         yaz_log(YLOG_WARN|YLOG_ERRNO, "short read %s", fname);
1741     fclose(inf);
1742     return buf;
1743 }
1744
1745 static void process_http_request(association *assoc, request *req)
1746 {
1747     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1748     ODR o = assoc->encode;
1749     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1750     Z_SRW_PDU *sr = 0;
1751     Z_SOAP *soap_package = 0;
1752     Z_GDU *p = 0;
1753     char *charset = 0;
1754     Z_HTTP_Response *hres = 0;
1755     int keepalive = 1;
1756     const char *stylesheet = 0; /* for now .. set later */
1757     Z_SRW_diagnostic *diagnostic = 0;
1758     int num_diagnostic = 0;
1759     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1760
1761     yaz_log(log_request, "%s %s HTTP/%s", hreq->method, hreq->path, hreq->version);
1762     if (!control_association(assoc, host, 0))
1763     {
1764         p = z_get_HTTP_Response(o, 404);
1765         r = 1;
1766     }
1767     if (r == 2 && assoc->server && assoc->server->docpath
1768         && hreq->path[0] == '/'
1769         &&
1770         /* check if path is a proper prefix of documentroot */
1771         strncmp(hreq->path+1, assoc->server->docpath,
1772                 strlen(assoc->server->docpath))
1773         == 0)
1774     {
1775         if (!check_path(hreq->path))
1776         {
1777             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1778             p = z_get_HTTP_Response(o, 404);
1779         }
1780         else
1781         {
1782             size_t content_size = 0;
1783             char *content_buf = read_file(hreq->path+1, o, &content_size);
1784             if (!content_buf)
1785             {
1786                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1787                 p = z_get_HTTP_Response(o, 404);
1788             }
1789             else
1790             {
1791                 const char *ctype = 0;
1792                 yaz_mime_types types = yaz_mime_types_create();
1793
1794                 yaz_mime_types_add(types, "xsl", "application/xml");
1795                 yaz_mime_types_add(types, "xml", "application/xml");
1796                 yaz_mime_types_add(types, "css", "text/css");
1797                 yaz_mime_types_add(types, "html", "text/html");
1798                 yaz_mime_types_add(types, "htm", "text/html");
1799                 yaz_mime_types_add(types, "txt", "text/plain");
1800                 yaz_mime_types_add(types, "js", "application/x-javascript");
1801
1802                 yaz_mime_types_add(types, "gif", "image/gif");
1803                 yaz_mime_types_add(types, "png", "image/png");
1804                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1805                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1806
1807                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1808                 if (!ctype)
1809                 {
1810                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1811                     p = z_get_HTTP_Response(o, 404);
1812                 }
1813                 else
1814                 {
1815                     p = z_get_HTTP_Response(o, 200);
1816                     hres = p->u.HTTP_Response;
1817                     hres->content_buf = content_buf;
1818                     hres->content_len = content_size;
1819                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1820                 }
1821                 yaz_mime_types_destroy(types);
1822             }
1823         }
1824         r = 1;
1825     }
1826
1827     if (r == 2)
1828     {
1829         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1830         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1831     }
1832     if (r == 2)  /* not taken */
1833     {
1834         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1835                            &diagnostic, &num_diagnostic);
1836         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1837     }
1838     if (r == 0)  /* decode SRW/SRU OK .. */
1839     {
1840         int http_code = 200;
1841         if (sr->which == Z_SRW_searchRetrieve_request)
1842         {
1843             Z_SRW_PDU *res =
1844                 yaz_srw_get_pdu(assoc->encode, Z_SRW_searchRetrieve_response,
1845                                 sr->srw_version);
1846             stylesheet = sr->u.request->stylesheet;
1847             if (num_diagnostic)
1848             {
1849                 res->u.response->diagnostics = diagnostic;
1850                 res->u.response->num_diagnostics = num_diagnostic;
1851             }
1852             else
1853             {
1854                 srw_bend_search(assoc, sr, res, &http_code);
1855             }
1856             if (http_code == 200)
1857                 soap_package->u.generic->p = res;
1858         }
1859         else if (sr->which == Z_SRW_explain_request)
1860         {
1861             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_explain_response,
1862                                              sr->srw_version);
1863             stylesheet = sr->u.explain_request->stylesheet;
1864             if (num_diagnostic)
1865             {
1866                 res->u.explain_response->diagnostics = diagnostic;
1867                 res->u.explain_response->num_diagnostics = num_diagnostic;
1868             }
1869             srw_bend_explain(assoc, sr, res->u.explain_response, &http_code);
1870             if (http_code == 200)
1871                 soap_package->u.generic->p = res;
1872         }
1873         else if (sr->which == Z_SRW_scan_request)
1874         {
1875             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_scan_response,
1876                                              sr->srw_version);
1877             stylesheet = sr->u.scan_request->stylesheet;
1878             if (num_diagnostic)
1879             {
1880                 res->u.scan_response->diagnostics = diagnostic;
1881                 res->u.scan_response->num_diagnostics = num_diagnostic;
1882             }
1883             srw_bend_scan(assoc, sr, res, &http_code);
1884             if (http_code == 200)
1885                 soap_package->u.generic->p = res;
1886         }
1887         else if (sr->which == Z_SRW_update_request)
1888         {
1889             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_update_response,
1890                                              sr->srw_version);
1891             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1892             if (num_diagnostic)
1893             {
1894                 res->u.update_response->diagnostics = diagnostic;
1895                 res->u.update_response->num_diagnostics = num_diagnostic;
1896             }
1897             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1898             srw_bend_update(assoc, sr, res->u.update_response, &http_code);
1899             if (http_code == 200)
1900                 soap_package->u.generic->p = res;
1901         }
1902         else
1903         {
1904             yaz_log(log_request, "SOAP ERROR");
1905             /* FIXME - what error, what query */
1906             http_code = 500;
1907             z_soap_error(assoc->encode, soap_package,
1908                          "SOAP-ENV:Client", "Bad method", 0);
1909         }
1910         if (http_code == 200 || http_code == 500)
1911         {
1912             static Z_SOAP_Handler soap_handlers[4] = {
1913 #if YAZ_HAVE_XML2
1914                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1915                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1916                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1917 #endif
1918                 {0, 0, 0}
1919             };
1920             char ctype[80];
1921             p = z_get_HTTP_Response(o, 200);
1922             hres = p->u.HTTP_Response;
1923
1924             if (!stylesheet && assoc->server)
1925                 stylesheet = assoc->server->stylesheet;
1926
1927             /* empty stylesheet means NO stylesheet */
1928             if (stylesheet && *stylesheet == '\0')
1929                 stylesheet = 0;
1930
1931             z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1932                                  &hres->content_buf, &hres->content_len,
1933                                  soap_handlers, charset, stylesheet);
1934             hres->code = http_code;
1935
1936             strcpy(ctype, "text/xml");
1937             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1938         }
1939         else
1940             p = z_get_HTTP_Response(o, http_code);
1941     }
1942
1943     if (p == 0)
1944         p = z_get_HTTP_Response(o, 500);
1945     hres = p->u.HTTP_Response;
1946     if (!strcmp(hreq->version, "1.0"))
1947     {
1948         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1949         if (v && !strcmp(v, "Keep-Alive"))
1950             keepalive = 1;
1951         else
1952             keepalive = 0;
1953         hres->version = "1.0";
1954     }
1955     else
1956     {
1957         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1958         if (v && !strcmp(v, "close"))
1959             keepalive = 0;
1960         else
1961             keepalive = 1;
1962         hres->version = "1.1";
1963     }
1964     if (!keepalive || !assoc->last_control->keepalive)
1965     {
1966         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1967         assoc->state = ASSOC_DEAD;
1968         assoc->cs_get_mask = 0;
1969     }
1970     else
1971     {
1972         int t;
1973         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1974
1975         if (alive && yaz_isdigit(*(const unsigned char *) alive))
1976             t = atoi(alive);
1977         else
1978             t = 15;
1979         if (t < 0 || t > 3600)
1980             t = 3600;
1981         iochan_settimeout(assoc->client_chan,t);
1982         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1983     }
1984     process_gdu_response(assoc, req, p);
1985 }
1986
1987 static void process_gdu_request(association *assoc, request *req)
1988 {
1989     if (req->gdu_request->which == Z_GDU_Z3950)
1990     {
1991         char *msg = 0;
1992         req->apdu_request = req->gdu_request->u.z3950;
1993         if (process_z_request(assoc, req, &msg) < 0)
1994             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1995     }
1996     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1997         process_http_request(assoc, req);
1998     else
1999     {
2000         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
2001     }
2002 }
2003
2004 /*
2005  * Initiate request processing.
2006  */
2007 static int process_z_request(association *assoc, request *req, char **msg)
2008 {
2009     Z_APDU *res;
2010     int retval;
2011
2012     *msg = "Unknown Error";
2013     assert(req && req->state == REQUEST_IDLE);
2014     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
2015     {
2016         *msg = "Missing InitRequest";
2017         return -1;
2018     }
2019     switch (req->apdu_request->which)
2020     {
2021     case Z_APDU_initRequest:
2022         res = process_initRequest(assoc, req); break;
2023     case Z_APDU_searchRequest:
2024         res = process_searchRequest(assoc, req); break;
2025     case Z_APDU_presentRequest:
2026         res = process_presentRequest(assoc, req); break;
2027     case Z_APDU_scanRequest:
2028         if (assoc->init->bend_scan)
2029             res = process_scanRequest(assoc, req);
2030         else
2031         {
2032             *msg = "Cannot handle Scan APDU";
2033             return -1;
2034         }
2035         break;
2036     case Z_APDU_extendedServicesRequest:
2037         if (assoc->init->bend_esrequest)
2038             res = process_ESRequest(assoc, req);
2039         else
2040         {
2041             *msg = "Cannot handle Extended Services APDU";
2042             return -1;
2043         }
2044         break;
2045     case Z_APDU_sortRequest:
2046         if (assoc->init->bend_sort)
2047             res = process_sortRequest(assoc, req);
2048         else
2049         {
2050             *msg = "Cannot handle Sort APDU";
2051             return -1;
2052         }
2053         break;
2054     case Z_APDU_close:
2055         process_close(assoc, req);
2056         return 0;
2057     case Z_APDU_deleteResultSetRequest:
2058         if (assoc->init->bend_delete)
2059             res = process_deleteRequest(assoc, req);
2060         else
2061         {
2062             *msg = "Cannot handle Delete APDU";
2063             return -1;
2064         }
2065         break;
2066     case Z_APDU_segmentRequest:
2067         if (assoc->init->bend_segment)
2068         {
2069             res = process_segmentRequest(assoc, req);
2070         }
2071         else
2072         {
2073             *msg = "Cannot handle Segment APDU";
2074             return -1;
2075         }
2076         break;
2077     case Z_APDU_triggerResourceControlRequest:
2078         return 0;
2079     default:
2080         *msg = "Bad APDU received";
2081         return -1;
2082     }
2083     if (res)
2084     {
2085         yaz_log(YLOG_DEBUG, "  result immediately available");
2086         retval = process_z_response(assoc, req, res);
2087     }
2088     else
2089     {
2090         yaz_log(YLOG_DEBUG, "  result unavailable");
2091         retval = -1;
2092     }
2093     return retval;
2094 }
2095
2096 /*
2097  * Encode response, and transfer the request structure to the outgoing queue.
2098  */
2099 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2100 {
2101     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2102
2103     if (assoc->print)
2104     {
2105         if (!z_GDU(assoc->print, &res, 0, 0))
2106             yaz_log(YLOG_WARN, "ODR print error: %s",
2107                 odr_errmsg(odr_geterror(assoc->print)));
2108         odr_reset(assoc->print);
2109     }
2110     if (!z_GDU(assoc->encode, &res, 0, 0))
2111     {
2112         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2113                 odr_errmsg(odr_geterror(assoc->decode)),
2114                 odr_getelement(assoc->decode));
2115         return -1;
2116     }
2117     req->response = odr_getbuf(assoc->encode, &req->len_response,
2118         &req->size_response);
2119     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2120     odr_reset(assoc->encode);
2121     req->state = REQUEST_IDLE;
2122     request_enq(&assoc->outgoing, req);
2123     /* turn the work over to the ir_session handler */
2124     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2125     assoc->cs_put_mask = EVENT_OUTPUT;
2126     /* Is there more work to be done? give that to the input handler too */
2127     for (;;)
2128     {
2129         req = request_head(&assoc->incoming);
2130         if (req && req->state == REQUEST_IDLE)
2131         {
2132             request_deq(&assoc->incoming);
2133             process_gdu_request(assoc, req);
2134         }
2135         else
2136             break;
2137     }
2138     return 0;
2139 }
2140
2141 /*
2142  * Encode response, and transfer the request structure to the outgoing queue.
2143  */
2144 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2145 {
2146     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*gres));
2147     gres->which = Z_GDU_Z3950;
2148     gres->u.z3950 = res;
2149
2150     return process_gdu_response(assoc, req, gres);
2151 }
2152
2153 static char *get_vhost(Z_OtherInformation *otherInfo)
2154 {
2155     return yaz_oi_get_string_oid(&otherInfo, yaz_oid_userinfo_proxy, 1, 0);
2156 }
2157
2158 /*
2159  * Handle init request.
2160  * At the moment, we don't check the options
2161  * anywhere else in the code - we just try not to do anything that would
2162  * break a naive client. We'll toss 'em into the association block when
2163  * we need them there.
2164  */
2165 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2166 {
2167     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2168     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2169     Z_InitResponse *resp = apdu->u.initResponse;
2170     bend_initresult *binitres;
2171     char options[140];
2172     statserv_options_block *cb = 0;  /* by default no control for backend */
2173
2174     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2175         cb = statserv_getcontrol();  /* got control block for backend */
2176
2177     if (cb && assoc->backend)
2178         (*cb->bend_close)(assoc->backend);
2179
2180     yaz_log(log_requestdetail, "Got initRequest");
2181     if (req->implementationId)
2182         yaz_log(log_requestdetail, "Id:        %s",
2183                 req->implementationId);
2184     if (req->implementationName)
2185         yaz_log(log_requestdetail, "Name:      %s",
2186                 req->implementationName);
2187     if (req->implementationVersion)
2188         yaz_log(log_requestdetail, "Version:   %s",
2189                 req->implementationVersion);
2190
2191     assoc_init_reset(assoc);
2192
2193     assoc->init->auth = req->idAuthentication;
2194     assoc->init->referenceId = req->referenceId;
2195
2196     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2197     {
2198         Z_CharSetandLanguageNegotiation *negotiation =
2199             yaz_get_charneg_record (req->otherInfo);
2200         if (negotiation &&
2201             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2202             assoc->init->charneg_request = negotiation;
2203     }
2204
2205     /* by default named_result_sets is 0 .. Enable it if client asks for it. */
2206     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2207         assoc->init->named_result_sets = 1;
2208
2209     assoc->backend = 0;
2210     if (cb)
2211     {
2212         if (req->implementationVersion)
2213             yaz_log(log_requestdetail, "Config:    %s",
2214                     cb->configname);
2215
2216         iochan_settimeout(assoc->client_chan, cb->idle_timeout);
2217
2218         /* we have a backend control block, so call that init function */
2219         if (!(binitres = (*cb->bend_init)(assoc->init)))
2220         {
2221             yaz_log(YLOG_WARN, "Bad response from backend.");
2222             return 0;
2223         }
2224         assoc->backend = binitres->handle;
2225     }
2226     else
2227     {
2228         /* no backend. return error */
2229         binitres = (bend_initresult *)
2230             odr_malloc(assoc->encode, sizeof(*binitres));
2231         binitres->errstring = 0;
2232         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2233         iochan_settimeout(assoc->client_chan, 10);
2234     }
2235     if ((assoc->init->bend_sort))
2236         yaz_log(YLOG_DEBUG, "Sort handler installed");
2237     if ((assoc->init->bend_search))
2238         yaz_log(YLOG_DEBUG, "Search handler installed");
2239     if ((assoc->init->bend_present))
2240         yaz_log(YLOG_DEBUG, "Present handler installed");
2241     if ((assoc->init->bend_esrequest))
2242         yaz_log(YLOG_DEBUG, "ESRequest handler installed");
2243     if ((assoc->init->bend_delete))
2244         yaz_log(YLOG_DEBUG, "Delete handler installed");
2245     if ((assoc->init->bend_scan))
2246         yaz_log(YLOG_DEBUG, "Scan handler installed");
2247     if ((assoc->init->bend_segment))
2248         yaz_log(YLOG_DEBUG, "Segment handler installed");
2249
2250     resp->referenceId = req->referenceId;
2251     *options = '\0';
2252     /* let's tell the client what we can do */
2253     if (ODR_MASK_GET(req->options, Z_Options_search))
2254     {
2255         ODR_MASK_SET(resp->options, Z_Options_search);
2256         strcat(options, "srch");
2257     }
2258     if (ODR_MASK_GET(req->options, Z_Options_present))
2259     {
2260         ODR_MASK_SET(resp->options, Z_Options_present);
2261         strcat(options, " prst");
2262     }
2263     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2264         assoc->init->bend_delete)
2265     {
2266         ODR_MASK_SET(resp->options, Z_Options_delSet);
2267         strcat(options, " del");
2268     }
2269     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2270         assoc->init->bend_esrequest)
2271     {
2272         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2273         strcat(options, " extendedServices");
2274     }
2275     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets)
2276         && assoc->init->named_result_sets)
2277     {
2278         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2279         strcat(options, " namedresults");
2280     }
2281     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2282     {
2283         ODR_MASK_SET(resp->options, Z_Options_scan);
2284         strcat(options, " scan");
2285     }
2286     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2287     {
2288         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2289         strcat(options, " concurrop");
2290     }
2291     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2292     {
2293         ODR_MASK_SET(resp->options, Z_Options_sort);
2294         strcat(options, " sort");
2295     }
2296
2297     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2298     {
2299         Z_OtherInformationUnit *p0;
2300
2301         if (!assoc->init->charneg_response)
2302         {
2303             if (assoc->init->query_charset)
2304             {
2305                 assoc->init->charneg_response = yaz_set_response_charneg(
2306                     assoc->encode, assoc->init->query_charset, 0,
2307                     assoc->init->records_in_same_charset);
2308             }
2309             else
2310             {
2311                 yaz_log(YLOG_WARN, "default query_charset not defined by backend");
2312             }
2313         }
2314         if (assoc->init->charneg_response
2315             && (p0=yaz_oi_update(&resp->otherInfo, assoc->encode, NULL, 0, 0)))
2316         {
2317             p0->which = Z_OtherInfo_externallyDefinedInfo;
2318             p0->information.externallyDefinedInfo =
2319                 assoc->init->charneg_response;
2320             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2321             strcat(options, " negotiation");
2322         }
2323     }
2324     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2325         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2326
2327     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2328     {
2329         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2330         assoc->version = 1; /* 1 & 2 are equivalent */
2331     }
2332     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2333     {
2334         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2335         assoc->version = 2;
2336     }
2337     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2338     {
2339         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2340         assoc->version = 3;
2341     }
2342
2343     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2344
2345     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2346         assoc->maximumRecordSize = odr_int_to_int(*req->maximumRecordSize);
2347
2348     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2349         assoc->preferredMessageSize = odr_int_to_int(*req->preferredMessageSize);
2350
2351     resp->preferredMessageSize =
2352         odr_intdup(assoc->encode, assoc->preferredMessageSize);
2353     resp->maximumRecordSize =
2354         odr_intdup(assoc->encode, assoc->maximumRecordSize);
2355
2356     resp->implementationId = odr_prepend(assoc->encode,
2357                 assoc->init->implementation_id,
2358                 resp->implementationId);
2359
2360     resp->implementationVersion = odr_prepend(assoc->encode,
2361                 assoc->init->implementation_version,
2362                 resp->implementationVersion);
2363
2364     resp->implementationName = odr_prepend(assoc->encode,
2365                 assoc->init->implementation_name,
2366                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2367
2368     if (binitres->errcode)
2369     {
2370         assoc->state = ASSOC_DEAD;
2371         resp->userInformationField =
2372             init_diagnostics(assoc->encode, binitres->errcode,
2373                              binitres->errstring);
2374         *resp->result = 0;
2375     }
2376     else
2377         assoc->state = ASSOC_UP;
2378
2379     if (log_request)
2380     {
2381         if (!req->idAuthentication)
2382             yaz_log(log_request, "Auth none");
2383         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2384         {
2385             const char *open = req->idAuthentication->u.open;
2386             const char *slash = strchr(open, '/');
2387             int len;
2388             if (slash)
2389                 len = slash - open;
2390             else
2391                 len = strlen(open);
2392                 yaz_log(log_request, "Auth open %.*s", len, open);
2393         }
2394         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2395         {
2396             const char *user = req->idAuthentication->u.idPass->userId;
2397             const char *group = req->idAuthentication->u.idPass->groupId;
2398             yaz_log(log_request, "Auth idPass %s %s",
2399                     user ? user : "-", group ? group : "-");
2400         }
2401         else if (req->idAuthentication->which
2402                  == Z_IdAuthentication_anonymous)
2403         {
2404             yaz_log(log_request, "Auth anonymous");
2405         }
2406         else
2407         {
2408             yaz_log(log_request, "Auth other");
2409         }
2410     }
2411     if (log_request)
2412     {
2413         WRBUF wr = wrbuf_alloc();
2414         wrbuf_printf(wr, "Init ");
2415         if (binitres->errcode)
2416             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2417         else
2418             wrbuf_printf(wr, "OK -");
2419         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2420                      (req->implementationId ? req->implementationId :"-"),
2421                      (req->implementationName ?
2422                       req->implementationName : "-"),
2423                      (req->implementationVersion ?
2424                       req->implementationVersion : "-")
2425             );
2426         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2427         wrbuf_destroy(wr);
2428     }
2429     return apdu;
2430 }
2431
2432 /*
2433  * Set the specified `errcode' and `errstring' into a UserInfo-1
2434  * external to be returned to the client in accordance with Z35.90
2435  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2436  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2437  */
2438 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2439 {
2440     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2441         addinfo ? " -- " : "", addinfo ? addinfo : "");
2442     return zget_init_diagnostics(odr, error, addinfo);
2443 }
2444
2445 /*
2446  * nonsurrogate diagnostic record.
2447  */
2448 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2449 {
2450     Z_Records *rec = (Z_Records *) odr_malloc(assoc->encode, sizeof(*rec));
2451
2452     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2453             addinfo ? " -- " : "", addinfo ? addinfo : "");
2454
2455     rec->which = Z_Records_NSD;
2456     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2457                                                            error, addinfo);
2458     return rec;
2459 }
2460
2461 /*
2462  * surrogate diagnostic.
2463  */
2464 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2465                                           const char *dbname,
2466                                           int error, const char *addinfo)
2467 {
2468     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2469             addinfo ? " -- " : "", addinfo ? addinfo : "");
2470     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2471 }
2472
2473 static Z_Records *pack_records(association *a, char *setname, Odr_int start,
2474                                Odr_int *num, Z_RecordComposition *comp,
2475                                Odr_int *next, Odr_int *pres,
2476                                Z_ReferenceId *referenceId,
2477                                Odr_oid *oid, int *errcode)
2478 {
2479     int recno, total_length = 0, dumped_records = 0;
2480     int toget = odr_int_to_int(*num);
2481     Z_Records *records =
2482         (Z_Records *) odr_malloc(a->encode, sizeof(*records));
2483     Z_NamePlusRecordList *reclist =
2484         (Z_NamePlusRecordList *) odr_malloc(a->encode, sizeof(*reclist));
2485
2486     records->which = Z_Records_DBOSD;
2487     records->u.databaseOrSurDiagnostics = reclist;
2488     reclist->num_records = 0;
2489
2490     if (toget < 0)
2491         return diagrec(a, YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE, 0);
2492     else if (toget == 0)
2493         reclist->records = odr_nullval();
2494     else
2495         reclist->records = (Z_NamePlusRecord **)
2496             odr_malloc(a->encode, sizeof(*reclist->records) * toget);
2497
2498     *pres = Z_PresentStatus_success;
2499     *num = 0;
2500     *next = 0;
2501
2502     yaz_log(log_requestdetail, "Request to pack " ODR_INT_PRINTF "+%d %s", start, toget, setname);
2503     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2504         a->maximumRecordSize);
2505     for (recno = odr_int_to_int(start); reclist->num_records < toget; recno++)
2506     {
2507         bend_fetch_rr freq;
2508         Z_NamePlusRecord *thisrec;
2509         int this_length = 0;
2510         /*
2511          * we get the number of bytes allocated on the stream before any
2512          * allocation done by the backend - this should give us a reasonable
2513          * idea of the total size of the data so far.
2514          */
2515         total_length = odr_total(a->encode) - dumped_records;
2516         freq.errcode = 0;
2517         freq.errstring = 0;
2518         freq.basename = 0;
2519         freq.len = 0;
2520         freq.record = 0;
2521         freq.last_in_set = 0;
2522         freq.setname = setname;
2523         freq.surrogate_flag = 0;
2524         freq.number = recno;
2525         freq.comp = comp;
2526         freq.request_format = oid;
2527         freq.output_format = 0;
2528         freq.stream = a->encode;
2529         freq.print = a->print;
2530         freq.referenceId = referenceId;
2531         freq.schema = 0;
2532
2533         retrieve_fetch(a, &freq);
2534
2535         *next = freq.last_in_set ? 0 : recno + 1;
2536
2537         if (freq.errcode)
2538         {
2539             if (!freq.surrogate_flag) /* non-surrogate diagnostic i.e. global */
2540             {
2541                 char s[20];
2542                 *pres = Z_PresentStatus_failure;
2543                 /* for 'present request out of range',
2544                    set addinfo to record position if not set */
2545                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2546                                 freq.errstring == 0)
2547                 {
2548                     sprintf(s, "%d", recno);
2549                     freq.errstring = s;
2550                 }
2551                 if (errcode)
2552                     *errcode = freq.errcode;
2553                 return diagrec(a, freq.errcode, freq.errstring);
2554             }
2555             reclist->records[reclist->num_records] =
2556                 surrogatediagrec(a, freq.basename, freq.errcode,
2557                                  freq.errstring);
2558             reclist->num_records++;
2559             continue;
2560         }
2561         if (freq.record == 0)  /* no error and no record ? */
2562         {
2563             *pres = Z_PresentStatus_partial_4;
2564             *next = 0;   /* signal end-of-set and stop */
2565             break;
2566         }
2567         if (freq.len >= 0)
2568             this_length = freq.len;
2569         else
2570             this_length = odr_total(a->encode) - total_length - dumped_records;
2571         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2572             this_length, total_length, dumped_records);
2573         if (a->preferredMessageSize > 0 &&
2574                 this_length + total_length > a->preferredMessageSize)
2575         {
2576             /* record is small enough, really */
2577             if (this_length <= a->preferredMessageSize && recno > start)
2578             {
2579                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2580                 *pres = Z_PresentStatus_partial_2;
2581                 if (*next > 0)
2582                     (*next)--;
2583                 break;
2584             }
2585             /* record can only be fetched by itself */
2586             if (this_length < a->maximumRecordSize)
2587             {
2588                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2589                 if (toget > 1)
2590                 {
2591                     yaz_log(YLOG_DEBUG, "  Dropped it");
2592                     reclist->records[reclist->num_records] =
2593                          surrogatediagrec(
2594                              a, freq.basename,
2595                              YAZ_BIB1_RECORD_EXCEEDS_PREFERRED_MESSAGE_SIZE, 0);
2596                     reclist->num_records++;
2597                     dumped_records += this_length;
2598                     continue;
2599                 }
2600             }
2601             else /* too big entirely */
2602             {
2603                 yaz_log(log_requestdetail, "Record > maxrcdsz "
2604                         "this=%d max=%d",
2605                         this_length, a->maximumRecordSize);
2606                 reclist->records[reclist->num_records] =
2607                     surrogatediagrec(
2608                         a, freq.basename,
2609                         YAZ_BIB1_RECORD_EXCEEDS_MAXIMUM_RECORD_SIZE, 0);
2610                 reclist->num_records++;
2611                 dumped_records += this_length;
2612                 continue;
2613             }
2614         }
2615
2616         if (!(thisrec = (Z_NamePlusRecord *)
2617               odr_malloc(a->encode, sizeof(*thisrec))))
2618             return 0;
2619         thisrec->databaseName = odr_strdup_null(a->encode, freq.basename);
2620         thisrec->which = Z_NamePlusRecord_databaseRecord;
2621
2622         if (!freq.output_format)
2623         {
2624             yaz_log(YLOG_WARN, "bend_fetch output_format not set");
2625             return 0;
2626         }
2627         thisrec->u.databaseRecord = z_ext_record_oid(
2628             a->encode, freq.output_format, freq.record, freq.len);
2629         if (!thisrec->u.databaseRecord)
2630             return 0;
2631         reclist->records[reclist->num_records] = thisrec;
2632         reclist->num_records++;
2633         if (freq.last_in_set)
2634             break;
2635     }
2636     *num = reclist->num_records;
2637     return records;
2638 }
2639
2640 static Z_APDU *process_searchRequest(association *assoc, request *reqb)
2641 {
2642     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2643     bend_search_rr *bsrr =
2644         (bend_search_rr *)nmem_malloc(reqb->request_mem, sizeof(*bsrr));
2645
2646     yaz_log(log_requestdetail, "Got SearchRequest.");
2647     bsrr->association = assoc;
2648     bsrr->referenceId = req->referenceId;
2649     bsrr->srw_sortKeys = 0;
2650     bsrr->srw_setname = 0;
2651     bsrr->srw_setnameIdleTime = 0;
2652     bsrr->estimated_hit_count = 0;
2653     bsrr->partial_resultset = 0;
2654     bsrr->extra_args = 0;
2655     bsrr->extra_response_data = 0;
2656
2657     yaz_log(log_requestdetail, "ResultSet '%s'", req->resultSetName);
2658     if (req->databaseNames)
2659     {
2660         int i;
2661         for (i = 0; i < req->num_databaseNames; i++)
2662             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2663     }
2664
2665     yaz_log_zquery_level(log_requestdetail,req->query);
2666
2667     if (assoc->init->bend_search)
2668     {
2669         bsrr->setname = req->resultSetName;
2670         bsrr->replace_set = *req->replaceIndicator;
2671         bsrr->num_bases = req->num_databaseNames;
2672         bsrr->basenames = req->databaseNames;
2673         bsrr->query = req->query;
2674         bsrr->stream = assoc->encode;
2675         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2676         bsrr->decode = assoc->decode;
2677         bsrr->print = assoc->print;
2678         bsrr->hits = 0;
2679         bsrr->errcode = 0;
2680         bsrr->errstring = NULL;
2681         bsrr->search_info = NULL;
2682         bsrr->search_input = req->additionalSearchInfo;
2683         if (!bsrr->search_input)
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