src/seshigh.c

   1 /* This file is part of the YAZ toolkit.
   2  * Copyright (C) 1995-2013 Index Data
   3  * See the file LICENSE for details.
   4  */
   5 /**
   6  * \file seshigh.c
   7  * \brief Implements GFS session logic.
   8  *
   9  * Frontend server logic.
  10  *
  11  * This code receives incoming APDUs, and handles client requests by means
  12  * of the backend API.
  13  *
  14  * Some of the code is getting quite involved, compared to simpler servers -
  15  * primarily because it is asynchronous both in the communication with
  16  * the user and the backend. We think the complexity will pay off in
  17  * the form of greater flexibility when more asynchronous facilities
  18  * are implemented.
  19  *
  20  * Memory management has become somewhat involved. In the simple case, where
  21  * only one PDU is pending at a time, it will simply reuse the same memory,
  22  * once it has found its working size. When we enable multiple concurrent
  23  * operations, perhaps even with multiple parallel calls to the backend, it
  24  * will maintain a pool of buffers for encoding and decoding, trying to
  25  * minimize memory allocation/deallocation during normal operation.
  26  *
  27  */
  28 #if HAVE_CONFIG_H
  29 #include <config.h>
  30 #endif
  31
  32 #include <limits.h>
  33 #include <stdlib.h>
  34 #include <stdio.h>
  35 #include <assert.h>
  36
  37 #if HAVE_SYS_TYPES_H
  38 #include <sys/types.h>
  39 #endif
  40 #if HAVE_SYS_STAT_H
  41 #include <sys/stat.h>
  42 #endif
  43
  44 #ifdef WIN32
  45 #include <io.h>
  46 #define S_ISREG(x) (x & _S_IFREG)
  47 #include <process.h>
  48 #endif
  49
  50 #if HAVE_UNISTD_H
  51 #include <unistd.h>
  52 #endif
  53
  54 #if YAZ_HAVE_XML2
  55 #include <libxml/parser.h>
  56 #include <libxml/tree.h>
  57 #endif
  58
  59 #include <yaz/facet.h>
  60 #include <yaz/xmalloc.h>
  61 #include <yaz/comstack.h>
  62 #include "eventl.h"
  63 #include "session.h"
  64 #include "mime.h"
  65 #include <yaz/proto.h>
  66 #include <yaz/oid_db.h>
  67 #include <yaz/log.h>
  68 #include <yaz/logrpn.h>
  69 #include <yaz/querytowrbuf.h>
  70 #include <yaz/statserv.h>
  71 #include <yaz/diagbib1.h>
  72 #include <yaz/charneg.h>
  73 #include <yaz/otherinfo.h>
  74 #include <yaz/yaz-util.h>
  75 #include <yaz/pquery.h>
  76 #include <yaz/oid_db.h>
  77
  78 #include <yaz/srw.h>
  79 #include <yaz/backend.h>
  80 #include <yaz/yaz-ccl.h>
  81
  82 static void process_gdu_request(association *assoc, request *req);
  83 static int process_z_request(association *assoc, request *req, char **msg);
  84 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  85 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  86 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  87 static Z_External *init_diagnostics(ODR odr, int errcode,
  88                                     const char *errstring);
  89 static Z_APDU *process_searchRequest(association *assoc, request *reqb);
  90 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  91                                       bend_search_rr *bsrr);
  92 static Z_APDU *process_presentRequest(association *assoc, request *reqb);
  93 static Z_APDU *process_scanRequest(association *assoc, request *reqb);
  94 static Z_APDU *process_sortRequest(association *assoc, request *reqb);
  95 static void process_close(association *assoc, request *reqb);
  96 static Z_APDU *process_deleteRequest(association *assoc, request *reqb);
  97 static Z_APDU *process_segmentRequest(association *assoc, request *reqb);
  98 static Z_APDU *process_ESRequest(association *assoc, request *reqb);
  99
 100 /* dynamic logging levels */
 101 static int logbits_set = 0;
 102 static int log_session = 0; /* one-line logs for session */
 103 static int log_sessiondetail = 0; /* more detailed stuff */
 104 static int log_request = 0; /* one-line logs for requests */
 105 static int log_requestdetail = 0;  /* more detailed stuff */
 106
 107 /** get_logbits sets global loglevel bits */
 108 static void get_logbits(void)
 109 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 110     if (!logbits_set)
 111     {
 112         logbits_set = 1;
 113         log_session = yaz_log_module_level("session");
 114         log_sessiondetail = yaz_log_module_level("sessiondetail");
 115         log_request = yaz_log_module_level("request");
 116         log_requestdetail = yaz_log_module_level("requestdetail");
 117     }
 118 }
 119
 120 static void wr_diag(WRBUF w, int error, const char *addinfo)
 121 {
 122     wrbuf_printf(w, "ERROR %d+", error);
 123     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
 124     if (addinfo)
 125     {
 126         wrbuf_puts(w, "+");
 127         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
 128     }
 129     wrbuf_puts(w, " ");
 130 }
 131
 132 static int odr_int_to_int(Odr_int v)
 133 {
 134     if (v >= INT_MAX)
 135         return INT_MAX;
 136     else if (v <= INT_MIN)
 137         return INT_MIN;
 138     else
 139         return (int) v;
 140 }
 141
 142 /*
 143  * Create and initialize a new association-handle.
 144  *  channel  : iochannel for the current line.
 145  *  link     : communications channel.
 146  * Returns: 0 or a new association handle.
 147  */
 148 association *create_association(IOCHAN channel, COMSTACK link,
 149                                 const char *apdufile)
 150 {
 151     association *anew;
 152
 153     if (!logbits_set)
 154         get_logbits();
 155     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 156         return 0;
 157     anew->init = 0;
 158     anew->version = 0;
 159     anew->last_control = 0;
 160     anew->client_chan = channel;
 161     anew->client_link = link;
 162     anew->cs_get_mask = 0;
 163     anew->cs_put_mask = 0;
 164     anew->cs_accept_mask = 0;
 165     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 166         !(anew->encode = odr_createmem(ODR_ENCODE)))
 167         return 0;
 168     if (apdufile && *apdufile)
 169     {
 170         FILE *f;
 171
 172         if (!(anew->print = odr_createmem(ODR_PRINT)))
 173             return 0;
 174         if (*apdufile == '@')
 175         {
 176             odr_setprint(anew->print, yaz_log_file());
 177         }
 178         else if (*apdufile != '-')
 179         {
 180             char filename[256];
 181             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 182             if (!(f = fopen(filename, "w")))
 183             {
 184                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 185                 return 0;
 186             }
 187             setvbuf(f, 0, _IONBF, 0);
 188             odr_setprint(anew->print, f);
 189         }
 190     }
 191     else
 192         anew->print = 0;
 193     anew->input_buffer = 0;
 194     anew->input_buffer_len = 0;
 195     anew->backend = 0;
 196     anew->state = ASSOC_NEW;
 197     request_initq(&anew->incoming);
 198     request_initq(&anew->outgoing);
 199     anew->proto = cs_getproto(link);
 200     anew->server = 0;
 201     return anew;
 202 }
 203
 204 /*
 205  * Free association and release resources.
 206  */
 207 void destroy_association(association *h)
 208 {
 209     statserv_options_block *cb = statserv_getcontrol();
 210     request *req;
 211
 212     xfree(h->init);
 213     odr_destroy(h->decode);
 214     odr_destroy(h->encode);
 215     if (h->print)
 216         odr_destroy(h->print);
 217     if (h->input_buffer)
 218     xfree(h->input_buffer);
 219     if (h->backend)
 220         (*cb->bend_close)(h->backend);
 221     while ((req = request_deq(&h->incoming)))
 222         request_release(req);
 223     while ((req = request_deq(&h->outgoing)))
 224         request_release(req);
 225     request_delq(&h->incoming);
 226     request_delq(&h->outgoing);
 227     xfree(h);
 228     xmalloc_trav("session closed");
 229 }
 230
 231 static void do_close_req(association *a, int reason, char *message,
 232                          request *req)
 233 {
 234     Z_APDU *apdu = zget_APDU(a->encode, Z_APDU_close);
 235     Z_Close *cls = apdu->u.close;
 236
 237     /* Purge request queue */
 238     while (request_deq(&a->incoming));
 239     while (request_deq(&a->outgoing));
 240     if (a->version >= 3)
 241     {
 242         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 243             reason, message ? message : "none");
 244         *cls->closeReason = reason;
 245         cls->diagnosticInformation = message;
 246         process_z_response(a, req, apdu);
 247         iochan_settimeout(a->client_chan, 20);
 248     }
 249     else
 250     {
 251         request_release(req);
 252         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 253         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 254         a->cs_put_mask = 0;
 255     }
 256     a->state = ASSOC_DEAD;
 257 }
 258
 259 static void do_close(association *a, int reason, char *message)
 260 {
 261     request *req = request_get(&a->outgoing);
 262     do_close_req(a, reason, message, req);
 263 }
 264
 265
 266 int ir_read(IOCHAN h, int event)
 267 {
 268     association *assoc = (association *)iochan_getdata(h);
 269     COMSTACK conn = assoc->client_link;
 270     request *req;
 271
 272     if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 273     {
 274         /* We aren't speaking to this fellow */
 275         if (assoc->state == ASSOC_DEAD)
 276         {
 277             yaz_log(log_session, "Connection closed - end of session");
 278             cs_close(conn);
 279             destroy_association(assoc);
 280             iochan_destroy(h);
 281             return 0;
 282         }
 283         assoc->cs_get_mask = EVENT_INPUT;
 284
 285         do
 286         {
 287             int res = cs_get(conn, &assoc->input_buffer,
 288                              &assoc->input_buffer_len);
 289             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 290             {
 291                 yaz_log(log_session, "Connection error: %s res=%d",
 292                         cs_errmsg(cs_errno(conn)), res);
 293                 req = request_get(&assoc->incoming); /* get a new request */
 294                 do_close_req(assoc, Z_Close_protocolError,
 295                              "Incoming package too large", req);
 296                 return 0;
 297             }
 298             else if (res <= 0)
 299             {
 300                 assoc->state = ASSOC_DEAD;
 301                 yaz_log(log_session, "Connection closed by client");
 302                 return 0;
 303             }
 304             else if (res == 1) /* incomplete read - wait for more  */
 305             {
 306                 if (conn->io_pending & CS_WANT_WRITE)
 307                     assoc->cs_get_mask |= EVENT_OUTPUT;
 308                 iochan_setflag(h, assoc->cs_get_mask);
 309                 return 0;
 310             }
 311             /* we got a complete PDU. Let's decode it */
 312             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 313                     assoc->input_buffer[0] & 0xff,
 314                     assoc->input_buffer[1] & 0xff,
 315                     assoc->input_buffer[2] & 0xff);
 316             req = request_get(&assoc->incoming); /* get a new request */
 317             odr_reset(assoc->decode);
 318             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 319             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 320             {
 321                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 322                         "[near byte %ld] ",
 323                         odr_errmsg(odr_geterror(assoc->decode)),
 324                         odr_getelement(assoc->decode),
 325                         (long) odr_offset(assoc->decode));
 326                 if (assoc->decode->error != OHTTP)
 327                 {
 328                     yaz_log(YLOG_WARN, "PDU dump:");
 329                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 330                     request_release(req);
 331                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 332                 }
 333                 else
 334                 {
 335                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 336                     assoc->state = ASSOC_DEAD;
 337                     process_gdu_response(assoc, req, p);
 338                 }
 339                 return 0;
 340             }
 341             req->request_mem = odr_extract_mem(assoc->decode);
 342             if (assoc->print)
 343             {
 344                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 345                     yaz_log(YLOG_WARN, "ODR print error: %s",
 346                             odr_errmsg(odr_geterror(assoc->print)));
 347                 odr_reset(assoc->print);
 348             }
 349             request_enq(&assoc->incoming, req);
 350         }
 351         while (cs_more(conn));
 352     }
 353     return 1;
 354 }
 355
 356 /*
 357  * This is where PDUs from the client are read and the further
 358  * processing is initiated. Flow of control moves down through the
 359  * various process_* functions below, until the encoded result comes back up
 360  * to the output handler in here.
 361  *
 362  *  h     : the I/O channel that has an outstanding event.
 363  *  event : the current outstanding event.
 364  */
 365 void ir_session(IOCHAN h, int event)
 366 {
 367     int res;
 368     association *assoc = (association *)iochan_getdata(h);
 369     COMSTACK conn = assoc->client_link;
 370     request *req;
 371
 372     assert(h && conn && assoc);
 373     if (event == EVENT_TIMEOUT)
 374     {
 375         if (assoc->state != ASSOC_UP)
 376         {
 377             yaz_log(log_session, "Timeout. Closing connection");
 378             /* do we need to lod this at all */
 379             cs_close(conn);
 380             destroy_association(assoc);
 381             iochan_destroy(h);
 382         }
 383         else
 384         {
 385             yaz_log(log_sessiondetail, "Timeout. Sending Z39.50 Close");
 386             do_close(assoc, Z_Close_lackOfActivity, 0);
 387         }
 388         return;
 389     }
 390     if (event & assoc->cs_accept_mask)
 391     {
 392         if (!cs_accept(conn))
 393         {
 394             yaz_log(YLOG_WARN, "accept failed");
 395             destroy_association(assoc);
 396             iochan_destroy(h);
 397             return;
 398         }
 399         iochan_clearflag(h, EVENT_OUTPUT);
 400         if (conn->io_pending)
 401         {   /* cs_accept didn't complete */
 402             assoc->cs_accept_mask =
 403                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 404                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 405
 406             iochan_setflag(h, assoc->cs_accept_mask);
 407         }
 408         else
 409         {   /* cs_accept completed. Prepare for reading (cs_get) */
 410             assoc->cs_accept_mask = 0;
 411             assoc->cs_get_mask = EVENT_INPUT;
 412             iochan_setflag(h, assoc->cs_get_mask);
 413         }
 414         return;
 415     }
 416     if (event & assoc->cs_get_mask) /* input */
 417     {
 418         if (!ir_read(h, event))
 419             return;
 420         req = request_head(&assoc->incoming);
 421         if (req->state == REQUEST_IDLE)
 422         {
 423             request_deq(&assoc->incoming);
 424             process_gdu_request(assoc, req);
 425         }
 426     }
 427     if (event & assoc->cs_put_mask)
 428     {
 429         request *req = request_head(&assoc->outgoing);
 430
 431         assoc->cs_put_mask = 0;
 432         yaz_log(YLOG_DEBUG, "ir_session (output)");
 433         req->state = REQUEST_PENDING;
 434         switch (res = cs_put(conn, req->response, req->len_response))
 435         {
 436         case -1:
 437             yaz_log(log_sessiondetail, "Connection closed by client");
 438             cs_close(conn);
 439             destroy_association(assoc);
 440             iochan_destroy(h);
 441             break;
 442         case 0: /* all sent - release the request structure */
 443             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 444 #if 0
 445             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 446                     req->response);
 447 #endif
 448             request_deq(&assoc->outgoing);
 449             request_release(req);
 450             if (!request_head(&assoc->outgoing))
 451             {   /* restore mask for cs_get operation ... */
 452                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 453                 iochan_setflag(h, assoc->cs_get_mask);
 454                 if (assoc->state == ASSOC_DEAD)
 455                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 456             }
 457             else
 458             {
 459                 assoc->cs_put_mask = EVENT_OUTPUT;
 460             }
 461             break;
 462         default:
 463             if (conn->io_pending & CS_WANT_WRITE)
 464                 assoc->cs_put_mask |= EVENT_OUTPUT;
 465             if (conn->io_pending & CS_WANT_READ)
 466                 assoc->cs_put_mask |= EVENT_INPUT;
 467             iochan_setflag(h, assoc->cs_put_mask);
 468         }
 469     }
 470     if (event & EVENT_EXCEPT)
 471     {
 472         yaz_log(YLOG_WARN, "ir_session (exception)");
 473         cs_close(conn);
 474         destroy_association(assoc);
 475         iochan_destroy(h);
 476     }
 477 }
 478
 479 static int process_z_request(association *assoc, request *req, char **msg);
 480
 481
 482 static void assoc_init_reset(association *assoc)
 483 {
 484     xfree(assoc->init);
 485     assoc->init = (bend_initrequest *) xmalloc(sizeof(*assoc->init));
 486
 487     assoc->init->stream = assoc->encode;
 488     assoc->init->print = assoc->print;
 489     assoc->init->auth = 0;
 490     assoc->init->referenceId = 0;
 491     assoc->init->implementation_version = 0;
 492     assoc->init->implementation_id = 0;
 493     assoc->init->implementation_name = 0;
 494     assoc->init->query_charset = 0;
 495     assoc->init->records_in_same_charset = 0;
 496     assoc->init->bend_sort = NULL;
 497     assoc->init->bend_search = NULL;
 498     assoc->init->bend_present = NULL;
 499     assoc->init->bend_esrequest = NULL;
 500     assoc->init->bend_delete = NULL;
 501     assoc->init->bend_scan = NULL;
 502     assoc->init->bend_segment = NULL;
 503     assoc->init->bend_fetch = NULL;
 504     assoc->init->bend_explain = NULL;
 505     assoc->init->bend_srw_scan = NULL;
 506     assoc->init->bend_srw_update = NULL;
 507     assoc->init->named_result_sets = 0;
 508
 509     assoc->init->charneg_request = NULL;
 510     assoc->init->charneg_response = NULL;
 511
 512     assoc->init->decode = assoc->decode;
 513     assoc->init->peer_name =
 514         odr_strdup(assoc->encode, cs_addrstr(assoc->client_link));
 515
 516     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 517 }
 518
 519 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 520 {
 521     statserv_options_block *cb = statserv_getcontrol();
 522     if (!assoc->init)
 523     {
 524         const char *encoding = "UTF-8";
 525         Z_External *ce;
 526         bend_initresult *binitres;
 527
 528         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 529         assoc_init_reset(assoc);
 530
 531         if (sr->username)
 532         {
 533             Z_IdAuthentication *auth = (Z_IdAuthentication *)
 534                 odr_malloc(assoc->decode, sizeof(*auth));
 535             size_t len;
 536
 537             len = strlen(sr->username) + 1;
 538             if (sr->password)
 539                 len += strlen(sr->password) + 2;
 540             yaz_log(log_requestdetail, "username=%s password-len=%ld",
 541                     sr->username, (long)
 542                     (sr->password ? strlen(sr->password) : 0));
 543             auth->which = Z_IdAuthentication_open;
 544             auth->u.open = (char *) odr_malloc(assoc->decode, len);
 545             strcpy(auth->u.open, sr->username);
 546             if (sr->password && *sr->password)
 547             {
 548                 strcat(auth->u.open, "/");
 549                 strcat(auth->u.open, sr->password);
 550             }
 551             assoc->init->auth = auth;
 552         }
 553
 554 #if 1
 555         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 556         assoc->init->charneg_request = ce->u.charNeg3;
 557 #endif
 558         assoc->backend = 0;
 559         if (!(binitres = (*cb->bend_init)(assoc->init)))
 560         {
 561             assoc->state = ASSOC_DEAD;
 562             yaz_add_srw_diagnostic(assoc->encode, d, num,
 563                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 564             return 0;
 565         }
 566         assoc->backend = binitres->handle;
 567         assoc->init->auth = 0;
 568         if (binitres->errcode)
 569         {
 570             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 571             assoc->state = ASSOC_DEAD;
 572             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 573                                    binitres->errstring);
 574             return 0;
 575         }
 576         return 1;
 577     }
 578     return 1;
 579 }
 580
 581 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 582 {
 583 #if YAZ_HAVE_XML2
 584     yaz_record_conv_t rc = 0;
 585     const char *match_schema = 0;
 586     Odr_oid *match_syntax = 0;
 587
 588     if (assoc->server)
 589     {
 590         int r;
 591         const char *input_schema = yaz_get_esn(rr->comp);
 592         Odr_oid *input_syntax_raw = rr->request_format;
 593
 594         const char *backend_schema = 0;
 595         Odr_oid *backend_syntax = 0;
 596
 597         r = yaz_retrieval_request(assoc->server->retrieval,
 598                                   input_schema,
 599                                   input_syntax_raw,
 600                                   &match_schema,
 601                                   &match_syntax,
 602                                   &rc,
 603                                   &backend_schema,
 604                                   &backend_syntax);
 605         if (r == -1) /* error ? */
 606         {
 607             const char *details = yaz_retrieval_get_error(
 608                 assoc->server->retrieval);
 609
 610             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 611             if (details)
 612                 rr->errstring = odr_strdup(rr->stream, details);
 613             return -1;
 614         }
 615         else if (r == 1 || r == 3)
 616         {
 617             const char *details = input_schema;
 618             rr->errcode =
 619                 YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
 620             if (details)
 621                 rr->errstring = odr_strdup(rr->stream, details);
 622             return -1;
 623         }
 624         else if (r == 2)
 625         {
 626             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 627             if (input_syntax_raw)
 628             {
 629                 char oidbuf[OID_STR_MAX];
 630                 oid_oid_to_dotstring(input_syntax_raw, oidbuf);
 631                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 632             }
 633             return -1;
 634         }
 635         if (backend_schema)
 636         {
 637             yaz_set_esn(&rr->comp, backend_schema, odr_getmem(rr->stream));
 638         }
 639         if (backend_syntax)
 640             rr->request_format = backend_syntax;
 641     }
 642     (*assoc->init->bend_fetch)(assoc->backend, rr);
 643     if (rc && rr->record && rr->errcode == 0)
 644     {   /* post conversion must take place .. */
 645         WRBUF output_record = wrbuf_alloc();
 646         int r = 1;
 647         const char *details = 0;
 648         if (rr->len > 0)
 649         {
 650             r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 651             if (r)
 652                 details = yaz_record_conv_get_error(rc);
 653         }
 654         else if (rr->len == -1 && rr->output_format &&
 655                  !oid_oidcmp(rr->output_format, yaz_oid_recsyn_opac))
 656         {
 657             r = yaz_record_conv_opac_record(
 658                 rc, (Z_OPACRecord *) rr->record, output_record);
 659             if (r)
 660                 details = yaz_record_conv_get_error(rc);
 661         }
 662         if (r == 0 && match_syntax &&
 663             !oid_oidcmp(match_syntax, yaz_oid_recsyn_opac))
 664         {
 665             yaz_marc_t mt = yaz_marc_create();
 666             Z_OPACRecord *opac = 0;
 667             if (yaz_xml_to_opac(mt, wrbuf_buf(output_record),
 668                                 wrbuf_len(output_record),
 669                                 &opac, 0 /* iconv */, rr->stream->mem, 0)
 670                 && opac)
 671             {
 672                 rr->len = -1;
 673                 rr->record = (char *) opac;
 674             }
 675             else
 676             {
 677                 details = "XML to OPAC conversion failed";
 678                 r = 1;
 679             }
 680             yaz_marc_destroy(mt);
 681         }
 682         else if (r == 0)
 683         {
 684             rr->len = wrbuf_len(output_record);
 685             rr->record = (char *) odr_malloc(rr->stream, rr->len);
 686             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 687         }
 688         if (r)
 689         {
 690             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 691             if (details)
 692                 rr->errstring = odr_strdup(rr->stream, details);
 693         }
 694         wrbuf_destroy(output_record);
 695     }
 696     if (match_syntax)
 697         rr->output_format = match_syntax;
 698     if (match_schema)
 699         rr->schema = odr_strdup(rr->stream, match_schema);
 700 #else
 701     (*assoc->init->bend_fetch)(assoc->backend, rr);
 702 #endif
 703     return 0;
 704 }
 705
 706 static int srw_bend_fetch(association *assoc, int pos,
 707                           Z_SRW_searchRetrieveRequest *srw_req,
 708                           Z_SRW_record *record,
 709                           const char **addinfo, int *last_in_set)
 710 {
 711     bend_fetch_rr rr;
 712     ODR o = assoc->encode;
 713
 714     rr.setname = "default";
 715     rr.number = pos;
 716     rr.referenceId = 0;
 717     rr.request_format = odr_oiddup(assoc->decode, yaz_oid_recsyn_xml);
 718
 719     rr.comp = (Z_RecordComposition *)
 720             odr_malloc(assoc->decode, sizeof(*rr.comp));
 721     rr.comp->which = Z_RecordComp_complex;
 722     rr.comp->u.complex = (Z_CompSpec *)
 723             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 724     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 725         odr_malloc(assoc->encode, sizeof(bool_t));
 726     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 727     rr.comp->u.complex->num_dbSpecific = 0;
 728     rr.comp->u.complex->dbSpecific = 0;
 729     rr.comp->u.complex->num_recordSyntax = 0;
 730     rr.comp->u.complex->recordSyntax = 0;
 731
 732     rr.comp->u.complex->generic = (Z_Specification *)
 733             odr_malloc(assoc->decode, sizeof(Z_Specification));
 734
 735     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 736     rr.comp->u.complex->generic->which = Z_Schema_uri;
 737     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 738
 739     /* ESN = recordSchema if recordSchema is present */
 740     rr.comp->u.complex->generic->elementSpec = 0;
 741     if (srw_req->recordSchema)
 742     {
 743         rr.comp->u.complex->generic->elementSpec =
 744             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 745         rr.comp->u.complex->generic->elementSpec->which =
 746             Z_ElementSpec_elementSetName;
 747         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 748             srw_req->recordSchema;
 749     }
 750
 751     rr.stream = assoc->encode;
 752     rr.print = assoc->print;
 753
 754     rr.basename = 0;
 755     rr.len = 0;
 756     rr.record = 0;
 757     rr.last_in_set = 0;
 758     rr.errcode = 0;
 759     rr.errstring = 0;
 760     rr.surrogate_flag = 0;
 761     rr.schema = srw_req->recordSchema;
 762
 763     if (!assoc->init->bend_fetch)
 764         return 1;
 765
 766     retrieve_fetch(assoc, &rr);
 767
 768     *last_in_set = rr.last_in_set;
 769
 770     if (rr.errcode && rr.surrogate_flag)
 771     {
 772         int code = yaz_diag_bib1_to_srw(rr.errcode);
 773         yaz_mk_sru_surrogate(o, record, pos, code, rr.errstring);
 774         return 0;
 775     }
 776     else if (rr.len >= 0)
 777     {
 778         record->recordData_buf = rr.record;
 779         record->recordData_len = rr.len;
 780         record->recordPosition = odr_intdup(o, pos);
 781         record->recordSchema = odr_strdup_null(
 782             o, rr.schema ? rr.schema : srw_req->recordSchema);
 783     }
 784     if (rr.errcode)
 785     {
 786         *addinfo = rr.errstring;
 787         return rr.errcode;
 788     }
 789     return 0;
 790 }
 791
 792 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 793                    Z_Query *query_result, char **sortkeys_p)
 794 {
 795     /* have a CQL query and  CQL to PQF transform .. */
 796     CQL_parser cp = cql_parser_create();
 797     int r;
 798     int srw_errcode = 0;
 799     const char *add = 0;
 800     WRBUF rpn_buf = wrbuf_alloc();
 801
 802     *sortkeys_p = 0;
 803     r = cql_parser_string(cp, cql);
 804     if (r)
 805     {
 806         srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 807     }
 808     if (!r)
 809     {
 810         struct cql_node *cn = cql_parser_result(cp);
 811
 812         /* Syntax OK */
 813         r = cql_transform(ct, cn, wrbuf_vp_puts, rpn_buf);
 814         if (r)
 815             srw_errcode = cql_transform_error(ct, &add);
 816         else
 817         {
 818             char out[100];
 819             int r = cql_sortby_to_sortkeys_buf(cn, out, sizeof(out)-1);
 820
 821             if (r == 0)
 822             {
 823                 if (*out)
 824                     yaz_log(log_requestdetail, "srw_sortKeys '%s'", out);
 825                 *sortkeys_p = odr_strdup(odr, out);
 826             }
 827             else
 828             {
 829                 yaz_log(log_requestdetail, "failed to create srw_sortKeys");
 830                 srw_errcode = YAZ_SRW_UNSUPP_SORT_TYPE;
 831             }
 832         }
 833     }
 834     if (!r)
 835     {
 836         /* Syntax & transform OK. */
 837         /* Convert PQF string to Z39.50 to RPN query struct */
 838         YAZ_PQF_Parser pp = yaz_pqf_create();
 839         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, wrbuf_cstr(rpn_buf));
 840         if (!rpnquery)
 841         {
 842             size_t off;
 843             const char *pqf_msg;
 844             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 845             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 846                     pqf_msg, code);
 847             srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 848         }
 849         else
 850         {
 851             query_result->which = Z_Query_type_1;
 852             query_result->u.type_1 = rpnquery;
 853         }
 854         yaz_pqf_destroy(pp);
 855     }
 856     cql_parser_destroy(cp);
 857     wrbuf_destroy(rpn_buf);
 858     return srw_errcode;
 859 }
 860
 861 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 862                         Z_AttributesPlusTerm *result)
 863 {
 864     Z_Query query;
 865     Z_RPNQuery *rpn;
 866     char *sortkeys = 0;
 867     int srw_error = cql2pqf(odr, cql, ct, &query, &sortkeys);
 868     if (srw_error)
 869         return srw_error;
 870     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 871         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* bad query type */
 872     rpn = query.u.type_1;
 873     if (!rpn->RPNStructure)
 874         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be structure */
 875     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 876         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be simple */
 877     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 878         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be be attributes + term */
 879     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 880            sizeof(*result));
 881     return 0;
 882 }
 883
 884
 885 static int ccl2pqf(ODR odr, const Odr_oct *ccl, CCL_bibset bibset,
 886                    bend_search_rr *bsrr)
 887 {
 888     char *ccl0;
 889     struct ccl_rpn_node *node;
 890     int errcode, pos;
 891
 892     ccl0 = odr_strdupn(odr, (char*) ccl->buf, ccl->len);
 893     if ((node = ccl_find_str(bibset, ccl0, &errcode, &pos)) == 0)
 894     {
 895         bsrr->errstring = (char*) ccl_err_msg(errcode);
 896         return YAZ_SRW_QUERY_SYNTAX_ERROR;    /* Query syntax error */
 897     }
 898
 899     bsrr->query->which = Z_Query_type_1;
 900     bsrr->query->u.type_1 = ccl_rpn_query(odr, node);
 901     return 0;
 902 }
 903
 904 static void srw_bend_search(association *assoc,
 905                             Z_SRW_PDU *sr,
 906                             Z_SRW_PDU *res,
 907                             int *http_code)
 908 {
 909     Z_SRW_searchRetrieveResponse *srw_res = res->u.response;
 910     int srw_error = 0;
 911     Z_External *ext;
 912     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 913
 914     *http_code = 200;
 915     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 916     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 917     if (srw_res->num_diagnostics == 0 && assoc->init)
 918     {
 919         bend_search_rr rr;
 920         rr.setname = "default";
 921         rr.replace_set = 1;
 922         rr.num_bases = 1;
 923         rr.basenames = &srw_req->database;
 924         rr.referenceId = 0;
 925         rr.srw_sortKeys = 0;
 926         rr.srw_setname = 0;
 927         rr.srw_setnameIdleTime = 0;
 928         rr.estimated_hit_count = 0;
 929         rr.partial_resultset = 0;
 930         rr.query = (Z_Query *) odr_malloc(assoc->decode, sizeof(*rr.query));
 931         rr.query->u.type_1 = 0;
 932         rr.extra_args = sr->extra_args;
 933         rr.extra_response_data = 0;
 934         rr.present_number = srw_req->maximumRecords ?
 935             *srw_req->maximumRecords : 0;
 936
 937         if (!srw_req->queryType || !strcmp(srw_req->queryType, "cql"))
 938         {
 939             if (assoc->server && assoc->server->cql_transform)
 940             {
 941                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query,
 942                                           assoc->server->cql_transform,
 943                                           rr.query,
 944                                           &rr.srw_sortKeys);
 945
 946                 if (srw_errcode)
 947                 {
 948                     yaz_add_srw_diagnostic(assoc->encode,
 949                                            &srw_res->diagnostics,
 950                                            &srw_res->num_diagnostics,
 951                                            srw_errcode, 0);
 952                 }
 953             }
 954             else
 955             {
 956                 /* CQL query to backend. Wrap it - Z39.50 style */
 957                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 958                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 959                                                         "1.2.840.10003.16.2");
 960                 ext->indirect_reference = 0;
 961                 ext->descriptor = 0;
 962                 ext->which = Z_External_CQL;
 963                 ext->u.cql = srw_req->query;
 964
 965                 rr.query->which = Z_Query_type_104;
 966                 rr.query->u.type_104 =  ext;
 967             }
 968         }
 969         else if (!strcmp(srw_req->queryType, "pqf"))
 970         {
 971             Z_RPNQuery *RPNquery;
 972             YAZ_PQF_Parser pqf_parser;
 973
 974             pqf_parser = yaz_pqf_create();
 975
 976             RPNquery = yaz_pqf_parse(pqf_parser, assoc->decode, srw_req->query);
 977             if (!RPNquery)
 978             {
 979                 const char *pqf_msg;
 980                 size_t off;
 981                 int code = yaz_pqf_error(pqf_parser, &pqf_msg, &off);
 982                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 983                         code, pqf_msg, (long) off);
 984                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 985             }
 986
 987             rr.query->which = Z_Query_type_1;
 988             rr.query->u.type_1 =  RPNquery;
 989
 990             yaz_pqf_destroy(pqf_parser);
 991         }
 992         else
 993         {
 994             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 995                                    &srw_res->num_diagnostics,
 996                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 997         }
 998         if (rr.query->u.type_1)
 999         {
1000             rr.stream = assoc->encode;
1001             rr.decode = assoc->decode;
1002             rr.print = assoc->print;
1003             if (srw_req->sort.sortKeys)
1004                 rr.srw_sortKeys = odr_strdup(assoc->encode,
1005                                              srw_req->sort.sortKeys);
1006             rr.association = assoc;
1007             rr.hits = 0;
1008             rr.errcode = 0;
1009             rr.errstring = 0;
1010             rr.search_info = 0;
1011             rr.search_input = 0;
1012
1013             if (srw_req->facetList)
1014                 yaz_oi_set_facetlist(&rr.search_input, assoc->encode,
1015                                      srw_req->facetList);
1016
1017             yaz_log_zquery_level(log_requestdetail,rr.query);
1018
1019             (assoc->init->bend_search)(assoc->backend, &rr);
1020             if (rr.errcode)
1021             {
1022                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1023                 {
1024                     *http_code = 404;
1025                 }
1026                 else
1027                 {
1028                     srw_error = yaz_diag_bib1_to_srw(rr.errcode);
1029                     yaz_add_srw_diagnostic(assoc->encode,
1030                                            &srw_res->diagnostics,
1031                                            &srw_res->num_diagnostics,
1032                                            srw_error, rr.errstring);
1033                 }
1034             }
1035             else
1036             {
1037                 int number = srw_req->maximumRecords ?
1038                     odr_int_to_int(*srw_req->maximumRecords) : 0;
1039                 int start = srw_req->startRecord ?
1040                     odr_int_to_int(*srw_req->startRecord) : 1;
1041
1042                 yaz_log(log_requestdetail, "Request to pack %d+%d out of "
1043                         ODR_INT_PRINTF,
1044                         start, number, rr.hits);
1045
1046                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
1047                 if (rr.srw_setname)
1048                 {
1049                     srw_res->resultSetId =
1050                         odr_strdup(assoc->encode, rr.srw_setname );
1051                     srw_res->resultSetIdleTime =
1052                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
1053                 }
1054
1055                 srw_res->facetList = yaz_oi_get_facetlist(&rr.search_info);
1056                 yaz_log(YLOG_LOG, "facetList res = %p",srw_res->facetList);
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     *http_code = 404;
1265     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1266     if (assoc->init)
1267     {
1268         bend_explain_rr rr;
1269
1270         rr.stream = assoc->encode;
1271         rr.decode = assoc->decode;
1272         rr.print = assoc->print;
1273         rr.explain_buf = 0;
1274         rr.database = srw_req->database;
1275         if (assoc->server)
1276             rr.server_node_ptr = assoc->server->server_node_ptr;
1277         else
1278             rr.server_node_ptr = 0;
1279         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1280         if (assoc->init->bend_explain)
1281             (*assoc->init->bend_explain)(assoc->backend, &rr);
1282         else
1283             srw_bend_explain_default(&rr);
1284
1285         if (rr.explain_buf)
1286         {
1287             int packing = Z_SRW_recordPacking_string;
1288             if (srw_req->recordPacking)
1289             {
1290                 packing =
1291                     yaz_srw_str_to_pack(srw_req->recordPacking);
1292                 if (packing == -1)
1293                     packing = Z_SRW_recordPacking_string;
1294             }
1295             srw_res->record.recordSchema = rr.schema;
1296             srw_res->record.recordPacking = packing;
1297             srw_res->record.recordData_buf = rr.explain_buf;
1298             srw_res->record.recordData_len = strlen(rr.explain_buf);
1299             srw_res->record.recordPosition = 0;
1300             *http_code = 200;
1301         }
1302     }
1303 }
1304
1305 static void srw_bend_scan(association *assoc,
1306                           Z_SRW_PDU *sr,
1307                           Z_SRW_PDU *res,
1308                           int *http_code)
1309 {
1310     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1311     Z_SRW_scanResponse *srw_res = res->u.scan_response;
1312     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1313
1314     *http_code = 200;
1315     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1316     if (srw_res->num_diagnostics == 0 && assoc->init)
1317     {
1318         int step_size = 0;
1319         struct scan_entry *save_entries;
1320
1321         bend_scan_rr *bsrr = (bend_scan_rr *)
1322             odr_malloc(assoc->encode, sizeof(*bsrr));
1323         bsrr->num_bases = 1;
1324         bsrr->basenames = &srw_req->database;
1325
1326         bsrr->num_entries = srw_req->maximumTerms ?
1327             odr_int_to_int(*srw_req->maximumTerms) : 10;
1328         bsrr->term_position = srw_req->responsePosition ?
1329             odr_int_to_int(*srw_req->responsePosition) : 1;
1330
1331         bsrr->errcode = 0;
1332         bsrr->errstring = 0;
1333         bsrr->referenceId = 0;
1334         bsrr->stream = assoc->encode;
1335         bsrr->print = assoc->print;
1336         bsrr->step_size = &step_size;
1337         bsrr->entries = 0;
1338         bsrr->setname = 0;
1339         bsrr->extra_args = sr->extra_args;
1340         bsrr->extra_response_data = 0;
1341
1342         if (bsrr->num_entries > 0)
1343         {
1344             int i;
1345             bsrr->entries = (struct scan_entry *)
1346                 odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1347                            bsrr->num_entries);
1348             for (i = 0; i<bsrr->num_entries; i++)
1349             {
1350                 bsrr->entries[i].term = 0;
1351                 bsrr->entries[i].occurrences = 0;
1352                 bsrr->entries[i].errcode = 0;
1353                 bsrr->entries[i].errstring = 0;
1354                 bsrr->entries[i].display_term = 0;
1355             }
1356         }
1357         save_entries = bsrr->entries;  /* save it so we can compare later */
1358
1359         if (srw_req->queryType && !strcmp(srw_req->queryType, "pqf") &&
1360             assoc->init->bend_scan)
1361         {
1362             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1363
1364             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1365                                       &bsrr->attributeset,
1366                                       srw_req->scanClause);
1367             yaz_pqf_destroy(pqf_parser);
1368             bsrr->scanClause = 0;
1369             ((int (*)(void *, bend_scan_rr *))
1370              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1371         }
1372         else if ((!srw_req->queryType || !strcmp(srw_req->queryType, "cql"))
1373                  && assoc->init->bend_scan && assoc->server
1374                  && assoc->server->cql_transform)
1375         {
1376             int srw_error;
1377             bsrr->scanClause = 0;
1378             bsrr->attributeset = 0;
1379             bsrr->term = (Z_AttributesPlusTerm *)
1380                 odr_malloc(assoc->decode, sizeof(*bsrr->term));
1381             srw_error = cql2pqf_scan(assoc->encode,
1382                                      srw_req->scanClause,
1383                                      assoc->server->cql_transform,
1384                                      bsrr->term);
1385             if (srw_error)
1386                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1387                                        &srw_res->num_diagnostics,
1388                                        srw_error, 0);
1389             else
1390             {
1391                 ((int (*)(void *, bend_scan_rr *))
1392                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1393             }
1394         }
1395         else if ((!srw_req->queryType || !strcmp(srw_req->queryType, "cql"))
1396                  && assoc->init->bend_srw_scan)
1397         {
1398             bsrr->term = 0;
1399             bsrr->attributeset = 0;
1400             bsrr->scanClause = srw_req->scanClause;
1401             ((int (*)(void *, bend_scan_rr *))
1402              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1403         }
1404         else
1405         {
1406             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1407                                    &srw_res->num_diagnostics,
1408                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1409         }
1410         if (bsrr->extra_response_data)
1411         {
1412             res->extraResponseData_buf = bsrr->extra_response_data;
1413             res->extraResponseData_len = strlen(bsrr->extra_response_data);
1414         }
1415         if (bsrr->errcode)
1416         {
1417             int srw_error;
1418             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1419             {
1420                 *http_code = 404;
1421                 return;
1422             }
1423             srw_error = yaz_diag_bib1_to_srw(bsrr->errcode);
1424
1425             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1426                                    &srw_res->num_diagnostics,
1427                                    srw_error, bsrr->errstring);
1428         }
1429         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1430         {
1431             int i;
1432             srw_res->terms = (Z_SRW_scanTerm*)
1433                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1434                            bsrr->num_entries);
1435
1436             srw_res->num_terms =  bsrr->num_entries;
1437             for (i = 0; i<bsrr->num_entries; i++)
1438             {
1439                 Z_SRW_scanTerm *t = srw_res->terms + i;
1440                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1441                 t->numberOfRecords =
1442                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1443                 t->displayTerm = 0;
1444                 if (save_entries == bsrr->entries &&
1445                     bsrr->entries[i].display_term)
1446                 {
1447                     /* the entries was _not_ set by the handler. So it's
1448                        safe to test for new member display_term. It is
1449                        NULL'ed by us.
1450                     */
1451                     t->displayTerm = odr_strdup(assoc->encode,
1452                                                 bsrr->entries[i].display_term);
1453                 }
1454                 t->whereInList = 0;
1455             }
1456         }
1457     }
1458     if (log_request)
1459     {
1460         WRBUF wr = wrbuf_alloc();
1461         wrbuf_printf(wr, "SRWScan %s ", srw_req->database);
1462
1463         if (srw_res->num_diagnostics)
1464             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1465         else if (srw_res->num_terms)
1466             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1467         else
1468             wrbuf_printf(wr, "OK - - ");
1469
1470         wrbuf_printf(wr, ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
1471                      (srw_req->responsePosition ?
1472                       *srw_req->responsePosition : 1),
1473                      (srw_req->maximumTerms ?
1474                       *srw_req->maximumTerms : 1));
1475         /* there is no step size in SRU/W ??? */
1476         wrbuf_printf(wr, "%s: %s ", srw_req->queryType, srw_req->scanClause);
1477         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1478         wrbuf_destroy(wr);
1479     }
1480
1481 }
1482
1483 static void srw_bend_update(association *assoc,
1484                             Z_SRW_PDU *sr,
1485                             Z_SRW_updateResponse *srw_res,
1486                             int *http_code)
1487 {
1488     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1489     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1490     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1491     *http_code = 404;
1492     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1493     if (assoc->init)
1494     {
1495         bend_update_rr rr;
1496         Z_SRW_extra_record *extra = srw_req->extra_record;
1497
1498         rr.stream = assoc->encode;
1499         rr.print = assoc->print;
1500         rr.num_bases = 1;
1501         rr.basenames = &srw_req->database;
1502         rr.operation = srw_req->operation;
1503         rr.operation_status = "failed";
1504         rr.record_id = 0;
1505         rr.record_versions = 0;
1506         rr.num_versions = 0;
1507         rr.record_packing = "string";
1508         rr.record_schema = 0;
1509         rr.record_data = 0;
1510         rr.extra_record_data = 0;
1511         rr.extra_request_data = 0;
1512         rr.extra_response_data = 0;
1513         rr.uri = 0;
1514         rr.message = 0;
1515         rr.details = 0;
1516
1517         *http_code = 200;
1518         if (rr.operation == 0)
1519         {
1520             yaz_add_sru_update_diagnostic(
1521                 assoc->encode, &srw_res->diagnostics,
1522                 &srw_res->num_diagnostics,
1523                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1524                 "action" );
1525             return;
1526         }
1527         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1528         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1529         if (!strcmp( rr.operation, "delete"))
1530         {
1531             if (srw_req->record && !srw_req->record->recordSchema)
1532             {
1533                 rr.record_schema = odr_strdup(
1534                     assoc->encode,
1535                     srw_req->record->recordSchema);
1536             }
1537             if (srw_req->record)
1538             {
1539                 rr.record_data = odr_strdupn(
1540                     assoc->encode,
1541                     srw_req->record->recordData_buf,
1542                     srw_req->record->recordData_len );
1543             }
1544             if (extra && extra->extraRecordData_len)
1545             {
1546                 rr.extra_record_data = odr_strdupn(
1547                     assoc->encode,
1548                     extra->extraRecordData_buf,
1549                     extra->extraRecordData_len );
1550             }
1551             if (srw_req->recordId)
1552                 rr.record_id = srw_req->recordId;
1553             else if (extra && extra->recordIdentifier)
1554                 rr.record_id = extra->recordIdentifier;
1555         }
1556         else if (!strcmp(rr.operation, "replace"))
1557         {
1558             if (srw_req->recordId)
1559                 rr.record_id = srw_req->recordId;
1560             else if (extra && extra->recordIdentifier)
1561                 rr.record_id = extra->recordIdentifier;
1562             else
1563             {
1564                 yaz_add_sru_update_diagnostic(
1565                     assoc->encode, &srw_res->diagnostics,
1566                     &srw_res->num_diagnostics,
1567                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1568                     "recordIdentifier");
1569             }
1570             if (!srw_req->record)
1571             {
1572                 yaz_add_sru_update_diagnostic(
1573                     assoc->encode, &srw_res->diagnostics,
1574                     &srw_res->num_diagnostics,
1575                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1576                     "record");
1577             }
1578             else
1579             {
1580                 if (srw_req->record->recordSchema)
1581                     rr.record_schema = odr_strdup(
1582                         assoc->encode, srw_req->record->recordSchema);
1583                 if (srw_req->record->recordData_len )
1584                 {
1585                     rr.record_data = odr_strdupn(assoc->encode,
1586                                                  srw_req->record->recordData_buf,
1587                                                  srw_req->record->recordData_len );
1588                 }
1589                 else
1590                 {
1591                     yaz_add_sru_update_diagnostic(
1592                         assoc->encode, &srw_res->diagnostics,
1593                         &srw_res->num_diagnostics,
1594                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1595                         "recordData" );
1596                 }
1597             }
1598             if (extra && extra->extraRecordData_len)
1599             {
1600                 rr.extra_record_data = odr_strdupn(
1601                     assoc->encode,
1602                     extra->extraRecordData_buf,
1603                     extra->extraRecordData_len );
1604             }
1605         }
1606         else if (!strcmp(rr.operation, "insert"))
1607         {
1608             if (srw_req->recordId)
1609                 rr.record_id = srw_req->recordId;
1610             else if (extra)
1611                 rr.record_id = extra->recordIdentifier;
1612
1613             if (srw_req->record)
1614             {
1615                 if (srw_req->record->recordSchema)
1616                     rr.record_schema = odr_strdup(
1617                         assoc->encode, srw_req->record->recordSchema);
1618
1619                 if (srw_req->record->recordData_len)
1620                     rr.record_data = odr_strdupn(
1621                         assoc->encode,
1622                         srw_req->record->recordData_buf,
1623                         srw_req->record->recordData_len );
1624             }
1625             if (extra && extra->extraRecordData_len)
1626             {
1627                 rr.extra_record_data = odr_strdupn(
1628                     assoc->encode,
1629                     extra->extraRecordData_buf,
1630                     extra->extraRecordData_len );
1631             }
1632         }
1633         else
1634             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1635                                           &srw_res->num_diagnostics,
1636                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1637                                           rr.operation );
1638
1639         if (srw_req->record)
1640         {
1641             const char *pack_str =
1642                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1643             if (pack_str)
1644                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1645         }
1646
1647         if (srw_req->num_recordVersions)
1648         {
1649             rr.record_versions = srw_req->recordVersions;
1650             rr.num_versions = srw_req->num_recordVersions;
1651         }
1652         if (srw_req->extraRequestData_len)
1653         {
1654             rr.extra_request_data = odr_strdupn(assoc->encode,
1655                                                 srw_req->extraRequestData_buf,
1656                                                 srw_req->extraRequestData_len );
1657         }
1658         if (srw_res->num_diagnostics == 0)
1659         {
1660             if ( assoc->init->bend_srw_update)
1661                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1662             else
1663                 yaz_add_sru_update_diagnostic(
1664                     assoc->encode, &srw_res->diagnostics,
1665                     &srw_res->num_diagnostics,
1666                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1667                     "No Update backend handler");
1668         }
1669
1670         if (rr.uri)
1671             yaz_add_srw_diagnostic_uri(assoc->encode,
1672                                        &srw_res->diagnostics,
1673                                        &srw_res->num_diagnostics,
1674                                        rr.uri,
1675                                        rr.message,
1676                                        rr.details);
1677         srw_res->recordId = rr.record_id;
1678         srw_res->operationStatus = rr.operation_status;
1679         srw_res->recordVersions = rr.record_versions;
1680         srw_res->num_recordVersions = rr.num_versions;
1681         if (srw_res->extraResponseData_len)
1682         {
1683             srw_res->extraResponseData_buf = rr.extra_response_data;
1684             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1685         }
1686         if (srw_res->num_diagnostics == 0 && rr.record_data)
1687         {
1688             srw_res->record = yaz_srw_get_record(assoc->encode);
1689             srw_res->record->recordSchema = rr.record_schema;
1690             if (rr.record_packing)
1691             {
1692                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1693
1694                 if (pack == -1)
1695                 {
1696                     pack = Z_SRW_recordPacking_string;
1697                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1698                             rr.record_packing);
1699                 }
1700                 srw_res->record->recordPacking = pack;
1701             }
1702             srw_res->record->recordData_buf = rr.record_data;
1703             srw_res->record->recordData_len = strlen(rr.record_data);
1704             if (rr.extra_record_data)
1705             {
1706                 Z_SRW_extra_record *ex =
1707                     yaz_srw_get_extra_record(assoc->encode);
1708                 srw_res->extra_record = ex;
1709                 ex->extraRecordData_buf = rr.extra_record_data;
1710                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1711             }
1712         }
1713     }
1714 }
1715
1716 /* check if path is OK (1); BAD (0) */
1717 static int check_path(const char *path)
1718 {
1719     if (*path != '/')
1720         return 0;
1721     if (strstr(path, ".."))
1722         return 0;
1723     return 1;
1724 }
1725
1726 static char *read_file(const char *fname, ODR o, size_t *sz)
1727 {
1728     char *buf;
1729     FILE *inf = fopen(fname, "rb");
1730     if (!inf)
1731         return 0;
1732
1733     fseek(inf, 0L, SEEK_END);
1734     *sz = ftell(inf);
1735     rewind(inf);
1736     buf = (char *) odr_malloc(o, *sz);
1737     if (fread(buf, 1, *sz, inf) != *sz)
1738         yaz_log(YLOG_WARN|YLOG_ERRNO, "short read %s", fname);
1739     fclose(inf);
1740     return buf;
1741 }
1742
1743 static void process_http_request(association *assoc, request *req)
1744 {
1745     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1746     ODR o = assoc->encode;
1747     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1748     Z_SRW_PDU *sr = 0;
1749     Z_SOAP *soap_package = 0;
1750     Z_GDU *p = 0;
1751     char *charset = 0;
1752     Z_HTTP_Response *hres = 0;
1753     int keepalive = 1;
1754     const char *stylesheet = 0; /* for now .. set later */
1755     Z_SRW_diagnostic *diagnostic = 0;
1756     int num_diagnostic = 0;
1757     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1758
1759     yaz_log(log_request, "%s %s HTTP/%s", hreq->method, hreq->path, hreq->version);
1760     if (!control_association(assoc, host, 0))
1761     {
1762         p = z_get_HTTP_Response(o, 404);
1763         r = 1;
1764     }
1765     if (r == 2 && assoc->server && assoc->server->docpath
1766         && hreq->path[0] == '/'
1767         &&
1768         /* check if path is a proper prefix of documentroot */
1769         strncmp(hreq->path+1, assoc->server->docpath,
1770                 strlen(assoc->server->docpath))
1771         == 0)
1772     {
1773         if (!check_path(hreq->path))
1774         {
1775             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1776             p = z_get_HTTP_Response(o, 404);
1777         }
1778         else
1779         {
1780             size_t content_size = 0;
1781             char *content_buf = read_file(hreq->path+1, o, &content_size);
1782             if (!content_buf)
1783             {
1784                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1785                 p = z_get_HTTP_Response(o, 404);
1786             }
1787             else
1788             {
1789                 const char *ctype = 0;
1790                 yaz_mime_types types = yaz_mime_types_create();
1791
1792                 yaz_mime_types_add(types, "xsl", "application/xml");
1793                 yaz_mime_types_add(types, "xml", "application/xml");
1794                 yaz_mime_types_add(types, "css", "text/css");
1795                 yaz_mime_types_add(types, "html", "text/html");
1796                 yaz_mime_types_add(types, "htm", "text/html");
1797                 yaz_mime_types_add(types, "txt", "text/plain");
1798                 yaz_mime_types_add(types, "js", "application/x-javascript");
1799
1800                 yaz_mime_types_add(types, "gif", "image/gif");
1801                 yaz_mime_types_add(types, "png", "image/png");
1802                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1803                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1804
1805                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1806                 if (!ctype)
1807                 {
1808                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1809                     p = z_get_HTTP_Response(o, 404);
1810                 }
1811                 else
1812                 {
1813                     p = z_get_HTTP_Response(o, 200);
1814                     hres = p->u.HTTP_Response;
1815                     hres->content_buf = content_buf;
1816                     hres->content_len = content_size;
1817                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1818                 }
1819                 yaz_mime_types_destroy(types);
1820             }
1821         }
1822         r = 1;
1823     }
1824
1825     if (r == 2)
1826     {
1827         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1828         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1829     }
1830     if (r == 2)  /* not taken */
1831     {
1832         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1833                            &diagnostic, &num_diagnostic);
1834         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1835     }
1836     if (r == 0)  /* decode SRW/SRU OK .. */
1837     {
1838         int http_code = 200;
1839         if (sr->which == Z_SRW_searchRetrieve_request)
1840         {
1841             Z_SRW_PDU *res =
1842                 yaz_srw_get_pdu(assoc->encode, Z_SRW_searchRetrieve_response,
1843                                 sr->srw_version);
1844             stylesheet = sr->u.request->stylesheet;
1845             if (num_diagnostic)
1846             {
1847                 res->u.response->diagnostics = diagnostic;
1848                 res->u.response->num_diagnostics = num_diagnostic;
1849             }
1850             else
1851             {
1852                 srw_bend_search(assoc, sr, res, &http_code);
1853             }
1854             if (http_code == 200)
1855                 soap_package->u.generic->p = res;
1856         }
1857         else if (sr->which == Z_SRW_explain_request)
1858         {
1859             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_explain_response,
1860                                              sr->srw_version);
1861             stylesheet = sr->u.explain_request->stylesheet;
1862             if (num_diagnostic)
1863             {
1864                 res->u.explain_response->diagnostics = diagnostic;
1865                 res->u.explain_response->num_diagnostics = num_diagnostic;
1866             }
1867             srw_bend_explain(assoc, sr, res->u.explain_response, &http_code);
1868             if (http_code == 200)
1869                 soap_package->u.generic->p = res;
1870         }
1871         else if (sr->which == Z_SRW_scan_request)
1872         {
1873             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_scan_response,
1874                                              sr->srw_version);
1875             stylesheet = sr->u.scan_request->stylesheet;
1876             if (num_diagnostic)
1877             {
1878                 res->u.scan_response->diagnostics = diagnostic;
1879                 res->u.scan_response->num_diagnostics = num_diagnostic;
1880             }
1881             srw_bend_scan(assoc, sr, res, &http_code);
1882             if (http_code == 200)
1883                 soap_package->u.generic->p = res;
1884         }
1885         else if (sr->which == Z_SRW_update_request)
1886         {
1887             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_update_response,
1888                                              sr->srw_version);
1889             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1890             if (num_diagnostic)
1891             {
1892                 res->u.update_response->diagnostics = diagnostic;
1893                 res->u.update_response->num_diagnostics = num_diagnostic;
1894             }
1895             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1896             srw_bend_update(assoc, sr, res->u.update_response, &http_code);
1897             if (http_code == 200)
1898                 soap_package->u.generic->p = res;
1899         }
1900         else
1901         {
1902             yaz_log(log_request, "SOAP ERROR");
1903             /* FIXME - what error, what query */
1904             http_code = 500;
1905             z_soap_error(assoc->encode, soap_package,
1906                          "SOAP-ENV:Client", "Bad method", 0);
1907         }
1908         if (http_code == 200 || http_code == 500)
1909         {
1910             static Z_SOAP_Handler soap_handlers[4] = {
1911 #if YAZ_HAVE_XML2
1912                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1913                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1914                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1915 #endif
1916                 {0, 0, 0}
1917             };
1918             char ctype[80];
1919             p = z_get_HTTP_Response(o, 200);
1920             hres = p->u.HTTP_Response;
1921
1922             if (!stylesheet && assoc->server)
1923                 stylesheet = assoc->server->stylesheet;
1924
1925             /* empty stylesheet means NO stylesheet */
1926             if (stylesheet && *stylesheet == '\0')
1927                 stylesheet = 0;
1928
1929             z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1930                                  &hres->content_buf, &hres->content_len,
1931                                  soap_handlers, charset, stylesheet);
1932             hres->code = http_code;
1933
1934             strcpy(ctype, "text/xml");
1935             if (charset && strlen(charset) < sizeof(ctype)-30)
1936             {
1937                 strcat(ctype, "; charset=");
1938                 strcat(ctype, charset);
1939             }
1940             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1941         }
1942         else
1943             p = z_get_HTTP_Response(o, http_code);
1944     }
1945
1946     if (p == 0)
1947         p = z_get_HTTP_Response(o, 500);
1948     hres = p->u.HTTP_Response;
1949     if (!strcmp(hreq->version, "1.0"))
1950     {
1951         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1952         if (v && !strcmp(v, "Keep-Alive"))
1953             keepalive = 1;
1954         else
1955             keepalive = 0;
1956         hres->version = "1.0";
1957     }
1958     else
1959     {
1960         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1961         if (v && !strcmp(v, "close"))
1962             keepalive = 0;
1963         else
1964             keepalive = 1;
1965         hres->version = "1.1";
1966     }
1967     if (!keepalive || !assoc->last_control->keepalive)
1968     {
1969         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1970         assoc->state = ASSOC_DEAD;
1971         assoc->cs_get_mask = 0;
1972     }
1973     else
1974     {
1975         int t;
1976         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1977
1978         if (alive && yaz_isdigit(*(const unsigned char *) alive))
1979             t = atoi(alive);
1980         else
1981             t = 15;
1982         if (t < 0 || t > 3600)
1983             t = 3600;
1984         iochan_settimeout(assoc->client_chan,t);
1985         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1986     }
1987     process_gdu_response(assoc, req, p);
1988 }
1989
1990 static void process_gdu_request(association *assoc, request *req)
1991 {
1992     if (req->gdu_request->which == Z_GDU_Z3950)
1993     {
1994         char *msg = 0;
1995         req->apdu_request = req->gdu_request->u.z3950;
1996         if (process_z_request(assoc, req, &msg) < 0)
1997             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1998     }
1999     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
2000         process_http_request(assoc, req);
2001     else
2002     {
2003         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
2004     }
2005 }
2006
2007 /*
2008  * Initiate request processing.
2009  */
2010 static int process_z_request(association *assoc, request *req, char **msg)
2011 {
2012     Z_APDU *res;
2013     int retval;
2014
2015     *msg = "Unknown Error";
2016     assert(req && req->state == REQUEST_IDLE);
2017     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
2018     {
2019         *msg = "Missing InitRequest";
2020         return -1;
2021     }
2022     switch (req->apdu_request->which)
2023     {
2024     case Z_APDU_initRequest:
2025         res = process_initRequest(assoc, req); break;
2026     case Z_APDU_searchRequest:
2027         res = process_searchRequest(assoc, req); break;
2028     case Z_APDU_presentRequest:
2029         res = process_presentRequest(assoc, req); break;
2030     case Z_APDU_scanRequest:
2031         if (assoc->init->bend_scan)
2032             res = process_scanRequest(assoc, req);
2033         else
2034         {
2035             *msg = "Cannot handle Scan APDU";
2036             return -1;
2037         }
2038         break;
2039     case Z_APDU_extendedServicesRequest:
2040         if (assoc->init->bend_esrequest)
2041             res = process_ESRequest(assoc, req);
2042         else
2043         {
2044             *msg = "Cannot handle Extended Services APDU";
2045             return -1;
2046         }
2047         break;
2048     case Z_APDU_sortRequest:
2049         if (assoc->init->bend_sort)
2050             res = process_sortRequest(assoc, req);
2051         else
2052         {
2053             *msg = "Cannot handle Sort APDU";
2054             return -1;
2055         }
2056         break;
2057     case Z_APDU_close:
2058         process_close(assoc, req);
2059         return 0;
2060     case Z_APDU_deleteResultSetRequest:
2061         if (assoc->init->bend_delete)
2062             res = process_deleteRequest(assoc, req);
2063         else
2064         {
2065             *msg = "Cannot handle Delete APDU";
2066             return -1;
2067         }
2068         break;
2069     case Z_APDU_segmentRequest:
2070         if (assoc->init->bend_segment)
2071         {
2072             res = process_segmentRequest(assoc, req);
2073         }
2074         else
2075         {
2076             *msg = "Cannot handle Segment APDU";
2077             return -1;
2078         }
2079         break;
2080     case Z_APDU_triggerResourceControlRequest:
2081         return 0;
2082     default:
2083         *msg = "Bad APDU received";
2084         return -1;
2085     }
2086     if (res)
2087     {
2088         yaz_log(YLOG_DEBUG, "  result immediately available");
2089         retval = process_z_response(assoc, req, res);
2090     }
2091     else
2092     {
2093         yaz_log(YLOG_DEBUG, "  result unavailable");
2094         retval = -1;
2095     }
2096     return retval;
2097 }
2098
2099 /*
2100  * Encode response, and transfer the request structure to the outgoing queue.
2101  */
2102 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2103 {
2104     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2105
2106     if (assoc->print)
2107     {
2108         if (!z_GDU(assoc->print, &res, 0, 0))
2109             yaz_log(YLOG_WARN, "ODR print error: %s",
2110                 odr_errmsg(odr_geterror(assoc->print)));
2111         odr_reset(assoc->print);
2112     }
2113     if (!z_GDU(assoc->encode, &res, 0, 0))
2114     {
2115         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2116                 odr_errmsg(odr_geterror(assoc->decode)),
2117                 odr_getelement(assoc->decode));
2118         return -1;
2119     }
2120     req->response = odr_getbuf(assoc->encode, &req->len_response,
2121         &req->size_response);
2122     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2123     odr_reset(assoc->encode);
2124     req->state = REQUEST_IDLE;
2125     request_enq(&assoc->outgoing, req);
2126     /* turn the work over to the ir_session handler */
2127     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2128     assoc->cs_put_mask = EVENT_OUTPUT;
2129     /* Is there more work to be done? give that to the input handler too */
2130     for (;;)
2131     {
2132         req = request_head(&assoc->incoming);
2133         if (req && req->state == REQUEST_IDLE)
2134         {
2135             request_deq(&assoc->incoming);
2136             process_gdu_request(assoc, req);
2137         }
2138         else
2139             break;
2140     }
2141     return 0;
2142 }
2143
2144 /*
2145  * Encode response, and transfer the request structure to the outgoing queue.
2146  */
2147 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2148 {
2149     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*gres));
2150     gres->which = Z_GDU_Z3950;
2151     gres->u.z3950 = res;
2152
2153     return process_gdu_response(assoc, req, gres);
2154 }
2155
2156 static char *get_vhost(Z_OtherInformation *otherInfo)
2157 {
2158     return yaz_oi_get_string_oid(&otherInfo, yaz_oid_userinfo_proxy, 1, 0);
2159 }
2160
2161 /*
2162  * Handle init request.
2163  * At the moment, we don't check the options
2164  * anywhere else in the code - we just try not to do anything that would
2165  * break a naive client. We'll toss 'em into the association block when
2166  * we need them there.
2167  */
2168 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2169 {
2170     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2171     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2172     Z_InitResponse *resp = apdu->u.initResponse;
2173     bend_initresult *binitres;
2174     char options[140];
2175     statserv_options_block *cb = 0;  /* by default no control for backend */
2176
2177     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2178         cb = statserv_getcontrol();  /* got control block for backend */
2179
2180     if (cb && assoc->backend)
2181         (*cb->bend_close)(assoc->backend);
2182
2183     yaz_log(log_requestdetail, "Got initRequest");
2184     if (req->implementationId)
2185         yaz_log(log_requestdetail, "Id:        %s",
2186                 req->implementationId);
2187     if (req->implementationName)
2188         yaz_log(log_requestdetail, "Name:      %s",
2189                 req->implementationName);
2190     if (req->implementationVersion)
2191         yaz_log(log_requestdetail, "Version:   %s",
2192                 req->implementationVersion);
2193
2194     assoc_init_reset(assoc);
2195
2196     assoc->init->auth = req->idAuthentication;
2197     assoc->init->referenceId = req->referenceId;
2198
2199     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2200     {
2201         Z_CharSetandLanguageNegotiation *negotiation =
2202             yaz_get_charneg_record (req->otherInfo);
2203         if (negotiation &&
2204             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2205             assoc->init->charneg_request = negotiation;
2206     }
2207
2208     /* by default named_result_sets is 0 .. Enable it if client asks for it. */
2209     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2210         assoc->init->named_result_sets = 1;
2211
2212     assoc->backend = 0;
2213     if (cb)
2214     {
2215         if (req->implementationVersion)
2216             yaz_log(log_requestdetail, "Config:    %s",
2217                     cb->configname);
2218
2219         iochan_settimeout(assoc->client_chan, cb->idle_timeout);
2220
2221         /* we have a backend control block, so call that init function */
2222         if (!(binitres = (*cb->bend_init)(assoc->init)))
2223         {
2224             yaz_log(YLOG_WARN, "Bad response from backend.");
2225             return 0;
2226         }
2227         assoc->backend = binitres->handle;
2228     }
2229     else
2230     {
2231         /* no backend. return error */
2232         binitres = (bend_initresult *)
2233             odr_malloc(assoc->encode, sizeof(*binitres));
2234         binitres->errstring = 0;
2235         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2236         iochan_settimeout(assoc->client_chan, 10);
2237     }
2238     if ((assoc->init->bend_sort))
2239         yaz_log(YLOG_DEBUG, "Sort handler installed");
2240     if ((assoc->init->bend_search))
2241         yaz_log(YLOG_DEBUG, "Search handler installed");
2242     if ((assoc->init->bend_present))
2243         yaz_log(YLOG_DEBUG, "Present handler installed");
2244     if ((assoc->init->bend_esrequest))
2245         yaz_log(YLOG_DEBUG, "ESRequest handler installed");
2246     if ((assoc->init->bend_delete))
2247         yaz_log(YLOG_DEBUG, "Delete handler installed");
2248     if ((assoc->init->bend_scan))
2249         yaz_log(YLOG_DEBUG, "Scan handler installed");
2250     if ((assoc->init->bend_segment))
2251         yaz_log(YLOG_DEBUG, "Segment handler installed");
2252
2253     resp->referenceId = req->referenceId;
2254     *options = '\0';
2255     /* let's tell the client what we can do */
2256     if (ODR_MASK_GET(req->options, Z_Options_search))
2257     {
2258         ODR_MASK_SET(resp->options, Z_Options_search);
2259         strcat(options, "srch");
2260     }
2261     if (ODR_MASK_GET(req->options, Z_Options_present))
2262     {
2263         ODR_MASK_SET(resp->options, Z_Options_present);
2264         strcat(options, " prst");
2265     }
2266     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2267         assoc->init->bend_delete)
2268     {
2269         ODR_MASK_SET(resp->options, Z_Options_delSet);
2270         strcat(options, " del");
2271     }
2272     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2273         assoc->init->bend_esrequest)
2274     {
2275         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2276         strcat(options, " extendedServices");
2277     }
2278     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets)
2279         && assoc->init->named_result_sets)
2280     {
2281         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2282         strcat(options, " namedresults");
2283     }
2284     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2285     {
2286         ODR_MASK_SET(resp->options, Z_Options_scan);
2287         strcat(options, " scan");
2288     }
2289     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2290     {
2291         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2292         strcat(options, " concurrop");
2293     }
2294     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2295     {
2296         ODR_MASK_SET(resp->options, Z_Options_sort);
2297         strcat(options, " sort");
2298     }
2299
2300     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2301     {
2302         Z_OtherInformationUnit *p0;
2303
2304         if (!assoc->init->charneg_response)
2305         {
2306             if (assoc->init->query_charset)
2307             {
2308                 assoc->init->charneg_response = yaz_set_response_charneg(
2309                     assoc->encode, assoc->init->query_charset, 0,
2310                     assoc->init->records_in_same_charset);
2311             }
2312             else
2313             {
2314                 yaz_log(YLOG_WARN, "default query_charset not defined by backend");
2315             }
2316         }
2317         if (assoc->init->charneg_response
2318             && (p0=yaz_oi_update(&resp->otherInfo, assoc->encode, NULL, 0, 0)))
2319         {
2320             p0->which = Z_OtherInfo_externallyDefinedInfo;
2321             p0->information.externallyDefinedInfo =
2322                 assoc->init->charneg_response;
2323             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2324             strcat(options, " negotiation");
2325         }
2326     }
2327     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2328         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2329
2330     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2331     {
2332         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2333         assoc->version = 1; /* 1 & 2 are equivalent */
2334     }
2335     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2336     {
2337         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2338         assoc->version = 2;
2339     }
2340     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2341     {
2342         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2343         assoc->version = 3;
2344     }
2345
2346     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2347
2348     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2349         assoc->maximumRecordSize = odr_int_to_int(*req->maximumRecordSize);
2350
2351     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2352         assoc->preferredMessageSize = odr_int_to_int(*req->preferredMessageSize);
2353
2354     resp->preferredMessageSize =
2355         odr_intdup(assoc->encode, assoc->preferredMessageSize);
2356     resp->maximumRecordSize =
2357         odr_intdup(assoc->encode, assoc->maximumRecordSize);
2358
2359     resp->implementationId = odr_prepend(assoc->encode,
2360                 assoc->init->implementation_id,
2361                 resp->implementationId);
2362
2363     resp->implementationVersion = odr_prepend(assoc->encode,
2364                 assoc->init->implementation_version,
2365                 resp->implementationVersion);
2366
2367     resp->implementationName = odr_prepend(assoc->encode,
2368                 assoc->init->implementation_name,
2369                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2370
2371     if (binitres->errcode)
2372     {
2373         assoc->state = ASSOC_DEAD;
2374         resp->userInformationField =
2375             init_diagnostics(assoc->encode, binitres->errcode,
2376                              binitres->errstring);
2377         *resp->result = 0;
2378     }
2379     else
2380         assoc->state = ASSOC_UP;
2381
2382     if (log_request)
2383     {
2384         if (!req->idAuthentication)
2385             yaz_log(log_request, "Auth none");
2386         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2387         {
2388             const char *open = req->idAuthentication->u.open;
2389             const char *slash = strchr(open, '/');
2390             int len;
2391             if (slash)
2392                 len = slash - open;
2393             else
2394                 len = strlen(open);
2395                 yaz_log(log_request, "Auth open %.*s", len, open);
2396         }
2397         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2398         {
2399             const char *user = req->idAuthentication->u.idPass->userId;
2400             const char *group = req->idAuthentication->u.idPass->groupId;
2401             yaz_log(log_request, "Auth idPass %s %s",
2402                     user ? user : "-", group ? group : "-");
2403         }
2404         else if (req->idAuthentication->which
2405                  == Z_IdAuthentication_anonymous)
2406         {
2407             yaz_log(log_request, "Auth anonymous");
2408         }
2409         else
2410         {
2411             yaz_log(log_request, "Auth other");
2412         }
2413     }
2414     if (log_request)
2415     {
2416         WRBUF wr = wrbuf_alloc();
2417         wrbuf_printf(wr, "Init ");
2418         if (binitres->errcode)
2419             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2420         else
2421             wrbuf_printf(wr, "OK -");
2422         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2423                      (req->implementationId ? req->implementationId :"-"),
2424                      (req->implementationName ?
2425                       req->implementationName : "-"),
2426                      (req->implementationVersion ?
2427                       req->implementationVersion : "-")
2428             );
2429         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2430         wrbuf_destroy(wr);
2431     }
2432     return apdu;
2433 }
2434
2435 /*
2436  * Set the specified `errcode' and `errstring' into a UserInfo-1
2437  * external to be returned to the client in accordance with Z35.90
2438  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2439  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2440  */
2441 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2442 {
2443     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2444         addinfo ? " -- " : "", addinfo ? addinfo : "");
2445     return zget_init_diagnostics(odr, error, addinfo);
2446 }
2447
2448 /*
2449  * nonsurrogate diagnostic record.
2450  */
2451 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2452 {
2453     Z_Records *rec = (Z_Records *) odr_malloc(assoc->encode, sizeof(*rec));
2454
2455     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2456             addinfo ? " -- " : "", addinfo ? addinfo : "");
2457
2458     rec->which = Z_Records_NSD;
2459     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2460                                                            error, addinfo);
2461     return rec;
2462 }
2463
2464 /*
2465  * surrogate diagnostic.
2466  */
2467 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2468                                           const char *dbname,
2469                                           int error, const char *addinfo)
2470 {
2471     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2472             addinfo ? " -- " : "", addinfo ? addinfo : "");
2473     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2474 }
2475
2476 static Z_Records *pack_records(association *a, char *setname, Odr_int start,
2477                                Odr_int *num, Z_RecordComposition *comp,
2478                                Odr_int *next, Odr_int *pres,
2479                                Z_ReferenceId *referenceId,
2480                                Odr_oid *oid, int *errcode)
2481 {
2482     int recno, total_length = 0, dumped_records = 0;
2483     int toget = odr_int_to_int(*num);
2484     Z_Records *records =
2485         (Z_Records *) odr_malloc(a->encode, sizeof(*records));
2486     Z_NamePlusRecordList *reclist =
2487         (Z_NamePlusRecordList *) odr_malloc(a->encode, sizeof(*reclist));
2488
2489     records->which = Z_Records_DBOSD;
2490     records->u.databaseOrSurDiagnostics = reclist;
2491     reclist->num_records = 0;
2492
2493     if (toget < 0)
2494         return diagrec(a, YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE, 0);
2495     else if (toget == 0)
2496         reclist->records = odr_nullval();
2497     else
2498         reclist->records = (Z_NamePlusRecord **)
2499             odr_malloc(a->encode, sizeof(*reclist->records) * toget);
2500
2501     *pres = Z_PresentStatus_success;
2502     *num = 0;
2503     *next = 0;
2504
2505     yaz_log(log_requestdetail, "Request to pack " ODR_INT_PRINTF "+%d %s", start, toget, setname);
2506     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2507         a->maximumRecordSize);
2508     for (recno = odr_int_to_int(start); reclist->num_records < toget; recno++)
2509     {
2510         bend_fetch_rr freq;
2511         Z_NamePlusRecord *thisrec;
2512         int this_length = 0;
2513         /*
2514          * we get the number of bytes allocated on the stream before any
2515          * allocation done by the backend - this should give us a reasonable
2516          * idea of the total size of the data so far.
2517          */
2518         total_length = odr_total(a->encode) - dumped_records;
2519         freq.errcode = 0;
2520         freq.errstring = 0;
2521         freq.basename = 0;
2522         freq.len = 0;
2523         freq.record = 0;
2524         freq.last_in_set = 0;
2525         freq.setname = setname;
2526         freq.surrogate_flag = 0;
2527         freq.number = recno;
2528         freq.comp = comp;
2529         freq.request_format = oid;
2530         freq.output_format = 0;
2531         freq.stream = a->encode;
2532         freq.print = a->print;
2533         freq.referenceId = referenceId;
2534         freq.schema = 0;
2535
2536         retrieve_fetch(a, &freq);
2537
2538         *next = freq.last_in_set ? 0 : recno + 1;
2539
2540         if (freq.errcode)
2541         {
2542             if (!freq.surrogate_flag) /* non-surrogate diagnostic i.e. global */
2543             {
2544                 char s[20];
2545                 *pres = Z_PresentStatus_failure;
2546                 /* for 'present request out of range',
2547                    set addinfo to record position if not set */
2548                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2549                                 freq.errstring == 0)
2550                 {
2551                     sprintf(s, "%d", recno);
2552                     freq.errstring = s;
2553                 }
2554                 if (errcode)
2555                     *errcode = freq.errcode;
2556                 return diagrec(a, freq.errcode, freq.errstring);
2557             }
2558             reclist->records[reclist->num_records] =
2559                 surrogatediagrec(a, freq.basename, freq.errcode,
2560                                  freq.errstring);
2561             reclist->num_records++;
2562             continue;
2563         }
2564         if (freq.record == 0)  /* no error and no record ? */
2565         {
2566             *pres = Z_PresentStatus_partial_4;
2567             *next = 0;   /* signal end-of-set and stop */
2568             break;
2569         }
2570         if (freq.len >= 0)
2571             this_length = freq.len;
2572         else
2573             this_length = odr_total(a->encode) - total_length - dumped_records;
2574         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2575             this_length, total_length, dumped_records);
2576         if (a->preferredMessageSize > 0 &&
2577                 this_length + total_length > a->preferredMessageSize)
2578         {
2579             /* record is small enough, really */
2580             if (this_length <= a->preferredMessageSize && recno > start)
2581             {
2582                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2583                 *pres = Z_PresentStatus_partial_2;
2584                 if (*next > 0)
2585                     (*next)--;
2586                 break;
2587             }
2588             /* record can only be fetched by itself */
2589             if (this_length < a->maximumRecordSize)
2590             {
2591                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2592                 if (toget > 1)
2593                 {
2594                     yaz_log(YLOG_DEBUG, "  Dropped it");
2595                     reclist->records[reclist->num_records] =
2596                          surrogatediagrec(
2597                              a, freq.basename,
2598                              YAZ_BIB1_RECORD_EXCEEDS_PREFERRED_MESSAGE_SIZE, 0);
2599                     reclist->num_records++;
2600                     dumped_records += this_length;
2601                     continue;
2602                 }
2603             }
2604             else /* too big entirely */
2605             {
2606                 yaz_log(log_requestdetail, "Record > maxrcdsz "
2607                         "this=%d max=%d",
2608                         this_length, a->maximumRecordSize);
2609                 reclist->records[reclist->num_records] =
2610                     surrogatediagrec(
2611                         a, freq.basename,
2612                         YAZ_BIB1_RECORD_EXCEEDS_MAXIMUM_RECORD_SIZE, 0);
2613                 reclist->num_records++;
2614                 dumped_records += this_length;
2615                 continue;
2616             }
2617         }
2618
2619         if (!(thisrec = (Z_NamePlusRecord *)
2620               odr_malloc(a->encode, sizeof(*thisrec))))
2621             return 0;
2622         thisrec->databaseName = odr_strdup_null(a->encode, freq.basename);
2623         thisrec->which = Z_NamePlusRecord_databaseRecord;
2624
2625         if (!freq.output_format)
2626         {
2627             yaz_log(YLOG_WARN, "bend_fetch output_format not set");
2628             return 0;
2629         }
2630         thisrec->u.databaseRecord = z_ext_record_oid(
2631             a->encode, freq.output_format, freq.record, freq.len);
2632         if (!thisrec->u.databaseRecord)
2633             return 0;
2634         reclist->records[reclist->num_records] = thisrec;
2635         reclist->num_records++;
2636         if (freq.last_in_set)
2637             break;
2638     }
2639     *num = reclist->num_records;
2640     return records;
2641 }
2642
2643 static Z_APDU *process_searchRequest(association *assoc, request *reqb)
2644 {
2645     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2646     bend_search_rr *bsrr =
2647         (bend_search_rr *)nmem_malloc(reqb->request_mem, sizeof(*bsrr));
2648
2649     yaz_log(log_requestdetail, "Got SearchRequest.");
2650     bsrr->association = assoc;
2651     bsrr->referenceId = req->referenceId;
2652     bsrr->srw_sortKeys = 0;
2653     bsrr->srw_setname = 0;
2654     bsrr->srw_setnameIdleTime = 0;
2655     bsrr->estimated_hit_count = 0;
2656     bsrr->partial_resultset = 0;
2657     bsrr->extra_args = 0;
2658     bsrr->extra_response_data = 0;
2659
2660     yaz_log(log_requestdetail, "ResultSet '%s'", req->resultSetName);
2661     if (req->databaseNames)
2662     {
2663         int i;
2664         for (i = 0; i < req->num_databaseNames; i++)
2665             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2666     }
2667
2668     yaz_log_zquery_level(log_requestdetail,req->query);
2669
2670     if (assoc->init->bend_search)
2671     {
2672         bsrr->setname = req->resultSetName;
2673         bsrr->replace_set = *req->replaceIndicator;
2674         bsrr->num_bases = req->num_databaseNames;
2675         bsrr->basenames = req->databaseNames;
2676         bsrr->query = req->query;
2677         bsrr->stream = assoc->encode;
2678         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2679         bsrr->decode = assoc->decode;
2680         bsrr->print = assoc->print;
2681         bsrr->hits = 0;
2682         bsrr->errcode = 0;
2683         bsrr->errstring = NULL;
2684         bsrr->search_info = NULL;
2685         bsrr->search_input = req->otherInfo;
2686         bsrr->present_number = *req->mediumSetPresentNumber;
2687
2688         if (assoc->server && assoc->server->cql_transform
2689             && req->query->which == Z_Query_type_104
2690             && req->query->u.type_104->which == Z_External_CQL)
2691         {
2692             /* have a CQL query and a CQL to PQF transform .. */
2693             int srw_errcode =
2694                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2695                         assoc->server->cql_transform, bsrr->query,
2696                         &bsrr->srw_sortKeys);
2697             if (srw_errcode)
2698                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2699         }
2700
2701         if (assoc->server && assoc->server->ccl_transform
2702             && req->query->which == Z_Query_type_2) /*CCL*/
2703         {
2704             /* have a CCL query and a CCL to PQF transform .. */
2705             int srw_errcode =
2706                 ccl2pqf(bsrr->stream, req->query->u.type_2,
2707                         assoc->server->ccl_transform, bsrr);
2708             if (srw_errcode)
2709                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2710         }
2711
2712         if (!bsrr->errcode)
2713             (assoc->init->bend_search)(assoc->backend, bsrr);
2714     }
2715     else
2716     {
2717         /* FIXME - make a diagnostic for it */
2718         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2719     }
2720     return response_searchRequest(assoc, reqb, bsrr);
2721 }
2722
2723 /*
2724  * Prepare a searchresponse based on the backend results. We probably want
2725  * to look at making the fetching of records nonblocking as well, but
2726  * so far, we'll keep things simple.
2727  * If bsrt is null, that means we're called in response to a communications
2728  * event, and we'll have to get the response for ourselves.
2729  */
2730 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2731                                       bend_search_rr *bsrt)
2732 {
2733     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2734     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2735     Z_SearchResponse *resp = (Z_SearchResponse *)
2736         odr_malloc(assoc->encode, sizeof(*resp));
2737     Odr_int *nulint = odr_intdup(assoc->encode, 0);
2738     Odr_int *next = odr_intdup(assoc->encode, 0);
2739     Odr_int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2740     Odr_int returnedrecs = 0;
2741
2742     apdu->which = Z_APDU_searchResponse;
2743     apdu->u.searchResponse = resp;
2744     resp->referenceId = req->referenceId;
2745     resp->additionalSearchInfo = 0;
2746     resp->otherInfo = 0;
2747     if (!bsrt)
2748     {
2749         yaz_log(YLOG_FATAL, "Bad result from backend");
2750         return 0;
2751     }
2752     else if (bsrt->errcode)
2753     {
2754         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2755         resp->resultCount = nulint;
2756         resp->numberOfRecordsReturned = nulint;
2757         resp->nextResultSetPosition = nulint;
2758         resp->searchStatus = odr_booldup(assoc->encode, 0);
2759         resp->resultSetStatus = none;
2760         resp->presentStatus = 0;
2761     }
2762     else
2763     {
2764         bool_t *sr = odr_booldup(assoc->encode, 1);
2765         Odr_int *toget = odr_intdup(assoc->encode, 0);
2766         Z_RecordComposition comp, *compp = 0;
2767
2768         yaz_log(log_requestdetail, "resultCount: " ODR_INT_PRINTF, bsrt->hits);
2769
2770         resp->records = 0;
2771         resp->resultCount = &bsrt->hits;
2772
2773         comp.which = Z_RecordComp_simple;
2774         /* how many records does the user agent want, then? */
2775         if (bsrt->hits < 0)
2776             *toget = 0;
2777         else if (bsrt->hits <= *req->smallSetUpperBound)
2778         {
2779             *toget = bsrt->hits;
2780             if ((comp.u.simple = req->smallSetElementSetNames))
2781                 compp = &comp;
2782         }
2783         else if (bsrt->hits < *req->largeSetLowerBound)
2784         {
2785             *toget = *req->mediumSetPresentNumber;
2786             if (*toget > bsrt->hits)
2787                 *toget = bsrt->hits;
2788             if ((comp.u.simple = req->mediumSetElementSetNames))
2789                 compp = &comp;
2790         }
2791         else
2792             *toget = 0;
2793
2794         if (*toget && !resp->records)
2795         {
2796             Odr_int *presst = odr_intdup(assoc->encode, 0);
2797             /* Call bend_present if defined */
2798             if (assoc->init->bend_present)
2799             {
2800                 bend_present_rr *bprr = (bend_present_rr *)
2801                     nmem_malloc(reqb->request_mem, sizeof(*bprr));
2802                 bprr->setname = req->resultSetName;
2803                 bprr->start = 1;
2804                 bprr->number = odr_int_to_int(*toget);
2805                 bprr->format = req->preferredRecordSyntax;
2806                 bprr->comp = compp;
2807                 bprr->referenceId = req->referenceId;
2808                 bprr->stream = assoc->encode;
2809                 bprr->print = assoc->print;
2810                 bprr->association = assoc;
2811                 bprr->errcode = 0;
2812                 bprr->errstring = NULL;
2813                 (*assoc->init->bend_present)(assoc->backend, bprr);
2814
2815                 if (bprr->errcode)
2816                 {
2817                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2818                     *resp->presentStatus = Z_PresentStatus_failure;
2819                 }
2820             }
2821
2822             if (!resp->records)
2823                 resp->records = pack_records(
2824                     assoc, req->resultSetName, 1,
2825                     toget, compp, next, presst, req->referenceId,
2826                     req->preferredRecordSyntax, NULL);
2827             if (!resp->records)
2828                 return 0;
2829             resp->numberOfRecordsReturned = toget;
2830             returnedrecs = *toget;
2831             resp->presentStatus = presst;
2832         }
2833         else
2834         {
2835             if (*resp->resultCount)
2836                 *next = 1;
2837             resp->numberOfRecordsReturned = nulint;
2838             resp->presentStatus = 0;
2839         }
2840         resp->nextResultSetPosition = next;
2841         resp->searchStatus = sr;
2842         resp->resultSetStatus = 0;
2843         if (bsrt->estimated_hit_count)
2844         {
2845             resp->resultSetStatus = odr_intdup(assoc->encode,
2846                                                Z_SearchResponse_estimate);
2847         }
2848         else if (bsrt->partial_resultset)
2849         {
2850             resp->resultSetStatus = odr_intdup(assoc->encode,
2851                                                Z_SearchResponse_subset);
2852         }
2853     }
2854     resp->additionalSearchInfo = bsrt->search_info;
2855
2856     if (log_request)
2857     {
2858         int i;
2859         WRBUF wr = wrbuf_alloc();
2860
2861         for (i = 0 ; i < req->num_databaseNames; i++)
2862         {
2863             if (i)
2864                 wrbuf_printf(wr, "+");
2865             wrbuf_puts(wr, req->databaseNames[i]);
2866         }
2867         wrbuf_printf(wr, " ");
2868
2869         if (bsrt->errcode)
2870             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2871         else
2872             wrbuf_printf(wr, "OK " ODR_INT_PRINTF, bsrt->hits);
2873         wrbuf_printf(wr, " %s 1+" ODR_INT_PRINTF " ",
2874                      req->resultSetName, returnedrecs);
2875         yaz_query_to_wrbuf(wr, req->query);
2876
2877         yaz_log(log_request, "Search %s", wrbuf_cstr(wr));
2878         wrbuf_destroy(wr);
2879     }
2880     return apdu;
2881 }
2882
2883 /*
2884  * Maybe we got a little over-friendly when we designed bend_fetch to
2885  * get only one record at a time. Some backends can optimise multiple-record
2886  * fetches, and at any rate, there is some overhead involved in
2887  * all that selecting and hopping around. Problem is, of course, that the
2888  * frontend can't know ahead of time how many records it'll need to
2889  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2890  * is downright lousy as a bulk data transfer protocol.
2891  *
2892  * To start with, we'll do the fetching of records from the backend
2893  * in one operation: To save some trips in and out of the event-handler,
2894  * and to simplify the interface to pack_records. At any rate, asynch
2895  * operation is more fun in operations that have an unpredictable execution
2896  * speed - which is normally more true for search than for present.
2897  */
2898 static Z_APDU *process_presentRequest(association *assoc, request *reqb)
2899 {
2900     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2901     Z_APDU *apdu;
2902     Z_PresentResponse *resp;
2903     Odr_int *next;
2904     Odr_int *num;
2905     int errcode = 0;
2906
2907     yaz_log(log_requestdetail, "Got PresentRequest.");
2908
2909     resp = (Z_PresentResponse *)odr_malloc(assoc->encode, sizeof(*resp));
2910     resp->records = 0;
2911     resp->presentStatus = odr_intdup(assoc->encode, 0);
2912     if (assoc->init->bend_present)
2913     {
2914         bend_present_rr *bprr = (bend_present_rr *)
2915             nmem_malloc(reqb->request_mem, sizeof(*bprr));
2916         bprr->setname = req->resultSetId;
2917         bprr->start = odr_int_to_int(*req->resultSetStartPoint);
2918         bprr->number = odr_int_to_int(*req->numberOfRecordsRequested);
2919         bprr->format = req->preferredRecordSyntax;
2920         bprr->comp = req->recordComposition;
2921         bprr->referenceId = req->referenceId;
2922         bprr->stream = assoc->encode;
2923         bprr->print = assoc->print;
2924         bprr->association = assoc;
2925         bprr->errcode = 0;
2926         bprr->errstring = NULL;
2927         (*assoc->init->bend_present)(assoc->backend, bprr);
2928
2929         if (bprr->errcode)
2930         {
2931             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2932             *resp->presentStatus = Z_PresentStatus_failure;
2933             errcode = bprr->errcode;
2934         }
2935     }
2936     apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2937     next = odr_intdup(assoc->encode, 0);
2938     num = odr_intdup(assoc->encode, 0);
2939
2940     apdu->which = Z_APDU_presentResponse;
2941     apdu->u.presentResponse = resp;
2942     resp->referenceId = req->referenceId;
2943     resp->otherInfo = 0;
2944
2945     if (!resp->records)
2946     {
2947         *num = *req->numberOfRecordsRequested;
2948         resp->records =
2949             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2950                          num, req->recordComposition, next,
2951                          resp->presentStatus,
2952                          req->referenceId, req->preferredRecordSyntax,
2953                          &errcode);
2954     }
2955     if (log_request)
2956     {
2957         WRBUF wr = wrbuf_alloc();
2958         wrbuf_printf(wr, "Present ");
2959
2960         if (*resp->presentStatus == Z_PresentStatus_failure)
2961             wrbuf_printf(wr, "ERROR %d ", errcode);
2962         else if (*resp->presentStatus == Z_PresentStatus_success)
2963             wrbuf_printf(wr, "OK -  ");
2964         else
2965             wrbuf_printf(wr, "Partial " ODR_INT_PRINTF " - ",
2966                          *resp->presentStatus);
2967
2968         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
2969                 req->resultSetId, *req->resultSetStartPoint,
2970                 *req->numberOfRecordsRequested);
2971         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
2972         wrbuf_destroy(wr);
2973     }
2974     if (!resp->records)
2975         return 0;
2976     resp->numberOfRecordsReturned = num;
2977     resp->nextResultSetPosition = next;
2978
2979     return apdu;
2980 }
2981
2982 /*
2983  * Scan was implemented rather in a hurry, and with support for only the basic
2984  * elements of the service in the backend API. Suggestions are welcome.
2985  */
2986 static Z_APDU *process_scanRequest(association *assoc, request *reqb)
2987 {
2988     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2989     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2990     Z_ScanResponse *res = (Z_ScanResponse *)
2991         odr_malloc(assoc->encode, sizeof(*res));
2992     Odr_int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2993     Odr_int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2994     Z_ListEntries *ents = (Z_ListEntries *)
2995         odr_malloc(assoc->encode, sizeof(*ents));
2996     Z_DiagRecs *diagrecs_p = NULL;
2997     bend_scan_rr *bsrr = (bend_scan_rr *)
2998         odr_malloc(assoc->encode, sizeof(*bsrr));
2999     struct scan_entry *save_entries;
3000     int step_size = 0;
3001
3002     yaz_log(log_requestdetail, "Got ScanRequest");
3003
3004     apdu->which = Z_APDU_scanResponse;
3005     apdu->u.scanResponse = res;
3006     res->referenceId = req->referenceId;
3007
3008     /* if step is absent, set it to 0 */
3009     if (req->stepSize)
3010         step_size = odr_int_to_int(*req->stepSize);
3011
3012     res->stepSize = 0;
3013     res->scanStatus = scanStatus;
3014     res->numberOfEntriesReturned = numberOfEntriesReturned;
3015     res->positionOfTerm = 0;
3016     res->entries = ents;
3017     ents->num_entries = 0;
3018     ents->entries = NULL;
3019     ents->num_nonsurrogateDiagnostics = 0;
3020     ents->nonsurrogateDiagnostics = NULL;
3021     res->attributeSet = 0;
3022     res->otherInfo = 0;
3023
3024     if (req->databaseNames)
3025     {
3026         int i;
3027         for (i = 0; i < req->num_databaseNames; i++)
3028             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
3029     }
3030     bsrr->scanClause = 0;
3031     bsrr->errcode = 0;
3032     bsrr->errstring = 0;
3033     bsrr->num_bases = req->num_databaseNames;
3034     bsrr->basenames = req->databaseNames;
3035     bsrr->num_entries = odr_int_to_int(*req->numberOfTermsRequested);
3036     bsrr->term = req->termListAndStartPoint;
3037     bsrr->referenceId = req->referenceId;
3038     bsrr->stream = assoc->encode;
3039     bsrr->print = assoc->print;
3040     bsrr->step_size = &step_size;
3041     bsrr->setname = yaz_oi_get_string_oid(&req->otherInfo,
3042                                           yaz_oid_userinfo_scan_set, 1, 0);
3043     bsrr->entries = 0;
3044     bsrr->extra_args = 0;
3045     bsrr->extra_response_data = 0;
3046     /* For YAZ 2.0 and earlier it was the backend handler that
3047        initialized entries (member display_term did not exist)
3048        YAZ 2.0 and later sets 'entries'  and initialize all members
3049        including 'display_term'. If YAZ 2.0 or later sees that
3050        entries was modified - we assume that it is an old handler and
3051        that 'display_term' is _not_ set.
3052     */
3053     if (bsrr->num_entries > 0)
3054     {
3055         int i;
3056         bsrr->entries = (struct scan_entry *)
3057             odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3058                        bsrr->num_entries);
3059         for (i = 0; i<bsrr->num_entries; i++)
3060         {
3061             bsrr->entries[i].term = 0;
3062             bsrr->entries[i].occurrences = 0;
3063             bsrr->entries[i].errcode = 0;
3064             bsrr->entries[i].errstring = 0;
3065             bsrr->entries[i].display_term = 0;
3066         }
3067     }
3068     save_entries = bsrr->entries;  /* save it so we can compare later */
3069
3070     bsrr->attributeset = req->attributeSet;
3071     log_scan_term_level(log_requestdetail, req->termListAndStartPoint,
3072                         bsrr->attributeset);
3073     bsrr->term_position = req->preferredPositionInResponse ?
3074         odr_int_to_int(*req->preferredPositionInResponse) : 1;
3075
3076     ((int (*)(void *, bend_scan_rr *))
3077      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3078
3079     if (bsrr->errcode)
3080         diagrecs_p = zget_DiagRecs(assoc->encode,
3081                                    bsrr->errcode, bsrr->errstring);
3082     else
3083     {
3084         int i;
3085         Z_Entry **tab = (Z_Entry **)
3086             odr_malloc(assoc->encode, sizeof(*tab) * bsrr->num_entries);
3087
3088         if (bsrr->status == BEND_SCAN_PARTIAL)
3089             *scanStatus = Z_Scan_partial_5;
3090         else
3091             *scanStatus = Z_Scan_success;
3092         res->stepSize = odr_intdup(assoc->encode, step_size);
3093         ents->entries = tab;
3094         ents->num_entries = bsrr->num_entries;
3095         res->numberOfEntriesReturned = odr_intdup(assoc->encode,
3096                                                    ents->num_entries);
3097         res->positionOfTerm = odr_intdup(assoc->encode, bsrr->term_position);
3098         for (i = 0; i < bsrr->num_entries; i++)
3099         {
3100             Z_Entry *e;
3101             Z_TermInfo *t;
3102             Odr_oct *o;
3103
3104             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3105             if (bsrr->entries[i].occurrences >= 0)
3106             {
3107                 e->which = Z_Entry_termInfo;
3108                 e->u.termInfo = t = (Z_TermInfo *)
3109                     odr_malloc(assoc->encode, sizeof(*t));
3110                 t->suggestedAttributes = 0;
3111                 t->displayTerm = 0;
3112                 if (save_entries == bsrr->entries &&
3113                     bsrr->entries[i].display_term)
3114                 {
3115                     /* the entries was _not_ set by the handler. So it's
3116                        safe to test for new member display_term. It is
3117                        NULL'ed by us.
3118                     */
3119                     t->displayTerm = odr_strdup(assoc->encode,
3120                                                 bsrr->entries[i].display_term);
3121                 }
3122                 t->alternativeTerm = 0;
3123                 t->byAttributes = 0;
3124                 t->otherTermInfo = 0;
3125                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3126                 t->term = (Z_Term *)
3127                     odr_malloc(assoc->encode, sizeof(*t->term));
3128                 t->term->which = Z_Term_general;
3129                 t->term->u.general = o =
3130                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3131                 o->buf = (unsigned char *)
3132                     odr_malloc(assoc->encode, o->len = o->size =
3133                                strlen(bsrr->entries[i].term));
3134                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3135                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (" ODR_INT_PRINTF ")", i,
3136                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3137             }
3138             else
3139             {
3140                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3141                                                   bsrr->entries[i].errcode,
3142                                                   bsrr->entries[i].errstring);
3143                 assert(drecs->num_diagRecs == 1);
3144                 e->which = Z_Entry_surrogateDiagnostic;
3145                 assert(drecs->diagRecs[0]);
3146                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3147             }
3148         }
3149     }
3150     if (diagrecs_p)
3151     {
3152         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3153         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3154     }
3155     if (log_request)
3156     {
3157         int i;
3158         WRBUF wr = wrbuf_alloc();
3159         wrbuf_printf(wr, "Scan ");
3160         for (i = 0 ; i < req->num_databaseNames; i++)
3161         {
3162             if (i)
3163                 wrbuf_printf(wr, "+");
3164             wrbuf_puts(wr, req->databaseNames[i]);
3165         }
3166
3167         wrbuf_printf(wr, " ");
3168
3169         if (bsrr->errcode)
3170             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3171         else
3172             wrbuf_printf(wr, "OK");
3173
3174         wrbuf_printf(wr, " " ODR_INT_PRINTF " - " ODR_INT_PRINTF "+"
3175                      ODR_INT_PRINTF "+" ODR_INT_PRINTF,
3176                      res->numberOfEntriesReturned ?
3177                      *res->numberOfEntriesReturned : 0,
3178                      (req->preferredPositionInResponse ?
3179                       *req->preferredPositionInResponse : 1),
3180                      *req->numberOfTermsRequested,
3181                      (res->stepSize ? *res->stepSize : 1));
3182
3183         if (bsrr->setname)
3184             wrbuf_printf(wr, "+%s", bsrr->setname);
3185
3186         wrbuf_printf(wr, " ");
3187         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3188                           bsrr->attributeset);
3189         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3190         wrbuf_destroy(wr);
3191     }
3192     return apdu;
3193 }
3194
3195 static Z_APDU *process_sortRequest(association *assoc, request *reqb)
3196 {
3197     int i;
3198     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3199     Z_SortResponse *res = (Z_SortResponse *)
3200         odr_malloc(assoc->encode, sizeof(*res));
3201     bend_sort_rr *bsrr = (bend_sort_rr *)
3202         odr_malloc(assoc->encode, sizeof(*bsrr));
3203
3204     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3205
3206     yaz_log(log_requestdetail, "Got SortRequest.");
3207
3208     bsrr->num_input_setnames = req->num_inputResultSetNames;
3209     for (i=0;i<req->num_inputResultSetNames;i++)
3210         yaz_log(log_requestdetail, "Input resultset: '%s'",
3211                 req->inputResultSetNames[i]);
3212     bsrr->input_setnames = req->inputResultSetNames;
3213     bsrr->referenceId = req->referenceId;
3214     bsrr->output_setname = req->sortedResultSetName;
3215     yaz_log(log_requestdetail, "Output resultset: '%s'",
3216                 req->sortedResultSetName);
3217     bsrr->sort_sequence = req->sortSequence;
3218        /*FIXME - dump those sequences too */
3219     bsrr->stream = assoc->encode;
3220     bsrr->print = assoc->print;
3221
3222     bsrr->sort_status = Z_SortResponse_failure;
3223     bsrr->errcode = 0;
3224     bsrr->errstring = 0;
3225
3226     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3227
3228     res->referenceId = bsrr->referenceId;
3229     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3230     res->resultSetStatus = 0;
3231     if (bsrr->errcode)
3232     {
3233         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3234                                        bsrr->errcode, bsrr->errstring);
3235         res->diagnostics = dr->diagRecs;
3236         res->num_diagnostics = dr->num_diagRecs;
3237     }
3238     else
3239     {
3240         res->num_diagnostics = 0;
3241         res->diagnostics = 0;
3242     }
3243     res->resultCount = 0;
3244     res->otherInfo = 0;
3245
3246     apdu->which = Z_APDU_sortResponse;
3247     apdu->u.sortResponse = res;
3248     if (log_request)
3249     {
3250         WRBUF wr = wrbuf_alloc();
3251         wrbuf_printf(wr, "Sort ");
3252         if (bsrr->errcode)
3253             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3254         else
3255             wrbuf_printf(wr,  "OK -");
3256         wrbuf_printf(wr, " (");
3257         for (i = 0; i<req->num_inputResultSetNames; i++)
3258         {
3259             if (i)
3260                 wrbuf_printf(wr, "+");
3261             wrbuf_puts(wr, req->inputResultSetNames[i]);
3262         }
3263         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3264
3265         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3266         wrbuf_destroy(wr);
3267     }
3268     return apdu;
3269 }
3270
3271 static Z_APDU *process_deleteRequest(association *assoc, request *reqb)
3272 {
3273     int i;
3274     Z_DeleteResultSetRequest *req =
3275         reqb->apdu_request->u.deleteResultSetRequest;
3276     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3277         odr_malloc(assoc->encode, sizeof(*res));
3278     bend_delete_rr *bdrr = (bend_delete_rr *)
3279         odr_malloc(assoc->encode, sizeof(*bdrr));
3280     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3281
3282     yaz_log(log_requestdetail, "Got DeleteRequest.");
3283
3284     bdrr->num_setnames = req->num_resultSetList;
3285     bdrr->setnames = req->resultSetList;
3286     for (i = 0; i<req->num_resultSetList; i++)
3287         yaz_log(log_requestdetail, "resultset: '%s'",
3288                 req->resultSetList[i]);
3289     bdrr->stream = assoc->encode;
3290     bdrr->print = assoc->print;
3291     bdrr->function = odr_int_to_int(*req->deleteFunction);
3292     bdrr->referenceId = req->referenceId;
3293     bdrr->statuses = 0;
3294     if (bdrr->num_setnames > 0)
3295     {
3296         bdrr->statuses = (int*)
3297             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3298                        bdrr->num_setnames);
3299         for (i = 0; i < bdrr->num_setnames; i++)
3300             bdrr->statuses[i] = 0;
3301     }
3302     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3303
3304     res->referenceId = req->referenceId;
3305
3306     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3307
3308     res->deleteListStatuses = 0;
3309     if (bdrr->num_setnames > 0)
3310     {
3311         int i;
3312         res->deleteListStatuses = (Z_ListStatuses *)
3313             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3314         res->deleteListStatuses->num = bdrr->num_setnames;
3315         res->deleteListStatuses->elements =
3316             (Z_ListStatus **)
3317             odr_malloc(assoc->encode,
3318                         sizeof(*res->deleteListStatuses->elements) *
3319                         bdrr->num_setnames);
3320         for (i = 0; i<bdrr->num_setnames; i++)
3321         {
3322             res->deleteListStatuses->elements[i] =
3323                 (Z_ListStatus *)
3324                 odr_malloc(assoc->encode,
3325                             sizeof(**res->deleteListStatuses->elements));
3326             res->deleteListStatuses->elements[i]->status =
3327                 odr_intdup(assoc->encode, bdrr->statuses[i]);
3328             res->deleteListStatuses->elements[i]->id =
3329                 odr_strdup(assoc->encode, bdrr->setnames[i]);
3330         }
3331     }
3332     res->numberNotDeleted = 0;
3333     res->bulkStatuses = 0;
3334     res->deleteMessage = 0;
3335     res->otherInfo = 0;
3336
3337     apdu->which = Z_APDU_deleteResultSetResponse;
3338     apdu->u.deleteResultSetResponse = res;
3339     if (log_request)
3340     {
3341         WRBUF wr = wrbuf_alloc();
3342         wrbuf_printf(wr, "Delete ");
3343         if (bdrr->delete_status)
3344             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3345         else
3346             wrbuf_printf(wr, "OK -");
3347         for (i = 0; i<req->num_resultSetList; i++)
3348             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3349         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3350         wrbuf_destroy(wr);
3351     }
3352     return apdu;
3353 }
3354
3355 static void process_close(association *assoc, request *reqb)
3356 {
3357     Z_Close *req = reqb->apdu_request->u.close;
3358     static char *reasons[] =
3359     {
3360         "finished",
3361         "shutdown",
3362         "systemProblem",
3363         "costLimit",
3364         "resources",
3365         "securityViolation",
3366         "protocolError",
3367         "lackOfActivity",
3368         "peerAbort",
3369         "unspecified"
3370     };
3371
3372     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3373         reasons[*req->closeReason], req->diagnosticInformation ?
3374         req->diagnosticInformation : "NULL");
3375     if (assoc->version < 3) /* to make do_force respond with close */
3376         assoc->version = 3;
3377     do_close_req(assoc, Z_Close_finished,
3378                  "Association terminated by client", reqb);
3379     yaz_log(log_request,"Close OK");
3380 }
3381
3382 static Z_APDU *process_segmentRequest(association *assoc, request *reqb)
3383 {
3384     bend_segment_rr req;
3385
3386     req.segment = reqb->apdu_request->u.segmentRequest;
3387     req.stream = assoc->encode;
3388     req.decode = assoc->decode;
3389     req.print = assoc->print;
3390     req.association = assoc;
3391
3392     (*assoc->init->bend_segment)(assoc->backend, &req);
3393
3394     return 0;
3395 }
3396
3397 static Z_APDU *process_ESRequest(association *assoc, request *reqb)
3398 {
3399     bend_esrequest_rr esrequest;
3400     const char *ext_name = "unknown";
3401
3402     Z_ExtendedServicesRequest *req =
3403         reqb->apdu_request->u.extendedServicesRequest;
3404     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3405
3406     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3407
3408     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3409     esrequest.stream = assoc->encode;
3410     esrequest.decode = assoc->decode;
3411     esrequest.print = assoc->print;
3412     esrequest.errcode = 0;
3413     esrequest.errstring = NULL;
3414     esrequest.association = assoc;
3415     esrequest.taskPackage = 0;
3416     esrequest.referenceId = req->referenceId;
3417
3418     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3419     {
3420         switch(esrequest.esr->taskSpecificParameters->which)
3421         {
3422         case Z_External_itemOrder:
3423             ext_name = "ItemOrder"; break;
3424         case Z_External_update:
3425             ext_name = "Update"; break;
3426         case Z_External_update0:
3427             ext_name = "Update0"; break;
3428         case Z_External_ESAdmin:
3429             ext_name = "Admin"; break;
3430
3431         }
3432     }
3433
3434     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3435
3436     resp->referenceId = req->referenceId;
3437
3438     if (esrequest.errcode == -1)
3439     {
3440         /* Backend service indicates request will be processed */
3441         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3442         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3443     }
3444     else if (esrequest.errcode == 0)
3445     {
3446         /* Backend service indicates request will be processed */
3447         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3448         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3449     }
3450     else
3451     {
3452         Z_DiagRecs *diagRecs =
3453             zget_DiagRecs(assoc->encode, esrequest.errcode,
3454                           esrequest.errstring);
3455         /* Backend indicates error, request will not be processed */
3456         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3457         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3458         resp->num_diagnostics = diagRecs->num_diagRecs;
3459         resp->diagnostics = diagRecs->diagRecs;
3460         if (log_request)
3461         {
3462             WRBUF wr = wrbuf_alloc();
3463             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3464             yaz_log(log_request, "EsRequest %s", wrbuf_cstr(wr) );
3465             wrbuf_destroy(wr);
3466         }
3467
3468     }
3469     /* Do something with the members of bend_extendedservice */
3470     if (esrequest.taskPackage)
3471     {
3472         resp->taskPackage = z_ext_record_oid(
3473             assoc->encode, yaz_oid_recsyn_extended,
3474             (const char *)  esrequest.taskPackage, -1);
3475     }
3476     yaz_log(YLOG_DEBUG,"Send the result apdu");
3477     return apdu;
3478 }
3479
3480 int bend_assoc_is_alive(bend_association assoc)
3481 {
3482     if (assoc->state == ASSOC_DEAD)
3483         return 0; /* already marked as dead. Don't check I/O chan anymore */
3484
3485     return iochan_is_alive(assoc->client_chan);
3486 }
3487
3488
3489 /*
3490  * Local variables:
3491  * c-basic-offset: 4
3492  * c-file-style: "Stroustrup"
3493  * indent-tabs-mode: nil
3494  * End:
3495  * vim: shiftwidth=4 tabstop=8 expandtab
3496  */
3497