src/seshigh.c

   1 /* This file is part of the YAZ toolkit.
   2  * Copyright (C) 1995-2009 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
  29 #include <stdlib.h>
  30 #include <stdio.h>
  31 #include <assert.h>
  32 #include <ctype.h>
  33
  34 #if HAVE_SYS_TYPES_H
  35 #include <sys/types.h>
  36 #endif
  37 #if HAVE_SYS_STAT_H
  38 #include <sys/stat.h>
  39 #endif
  40
  41 #ifdef WIN32
  42 #include <io.h>
  43 #define S_ISREG(x) (x & _S_IFREG)
  44 #include <process.h>
  45 #endif
  46
  47 #if HAVE_UNISTD_H
  48 #include <unistd.h>
  49 #endif
  50
  51 #if YAZ_HAVE_XML2
  52 #include <libxml/parser.h>
  53 #include <libxml/tree.h>
  54 #endif
  55
  56 #include <yaz/yconfig.h>
  57 #include <yaz/xmalloc.h>
  58 #include <yaz/comstack.h>
  59 #include "eventl.h"
  60 #include "session.h"
  61 #include "mime.h"
  62 #include <yaz/proto.h>
  63 #include <yaz/oid_db.h>
  64 #include <yaz/log.h>
  65 #include <yaz/logrpn.h>
  66 #include <yaz/querytowrbuf.h>
  67 #include <yaz/statserv.h>
  68 #include <yaz/diagbib1.h>
  69 #include <yaz/charneg.h>
  70 #include <yaz/otherinfo.h>
  71 #include <yaz/yaz-util.h>
  72 #include <yaz/pquery.h>
  73 #include <yaz/oid_db.h>
  74
  75 #include <yaz/srw.h>
  76 #include <yaz/backend.h>
  77 #include <yaz/yaz-ccl.h>
  78
  79 static void process_gdu_request(association *assoc, request *req);
  80 static int process_z_request(association *assoc, request *req, char **msg);
  81 void backend_response(IOCHAN i, int event);
  82 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  83 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  84 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  85 static Z_External *init_diagnostics(ODR odr, int errcode,
  86                                     const char *errstring);
  87 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
  88     int *fd);
  89 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  90     bend_search_rr *bsrr, int *fd);
  91 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
  92     int *fd);
  93 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
  94 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
  95 static void process_close(association *assoc, request *reqb);
  96 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
  97     int *fd);
  98 static Z_APDU *process_segmentRequest(association *assoc, request *reqb);
  99
 100 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
 101
 102 /* dynamic logging levels */
 103 static int logbits_set = 0;
 104 static int log_session = 0; /* one-line logs for session */
 105 static int log_sessiondetail = 0; /* more detailed stuff */
 106 static int log_request = 0; /* one-line logs for requests */
 107 static int log_requestdetail = 0;  /* more detailed stuff */
 108
 109 /** get_logbits sets global loglevel bits */
 110 static void get_logbits(void)
 111 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 112     if (!logbits_set)
 113     {
 114         logbits_set = 1;
 115         log_session = yaz_log_module_level("session");
 116         log_sessiondetail = yaz_log_module_level("sessiondetail");
 117         log_request = yaz_log_module_level("request");
 118         log_requestdetail = yaz_log_module_level("requestdetail");
 119     }
 120 }
 121
 122
 123
 124 static void wr_diag(WRBUF w, int error, const char *addinfo)
 125 {
 126     wrbuf_printf(w, "ERROR %d+", error);
 127     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
 128     if (addinfo){
 129         wrbuf_puts(w, "+");
 130         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
 131     }
 132
 133     wrbuf_puts(w, " ");
 134 }
 135
 136
 137 /*
 138  * Create and initialize a new association-handle.
 139  *  channel  : iochannel for the current line.
 140  *  link     : communications channel.
 141  * Returns: 0 or a new association handle.
 142  */
 143 association *create_association(IOCHAN channel, COMSTACK link,
 144                                 const char *apdufile)
 145 {
 146     association *anew;
 147
 148     if (!logbits_set)
 149         get_logbits();
 150     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 151         return 0;
 152     anew->init = 0;
 153     anew->version = 0;
 154     anew->last_control = 0;
 155     anew->client_chan = channel;
 156     anew->client_link = link;
 157     anew->cs_get_mask = 0;
 158     anew->cs_put_mask = 0;
 159     anew->cs_accept_mask = 0;
 160     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 161         !(anew->encode = odr_createmem(ODR_ENCODE)))
 162         return 0;
 163     if (apdufile && *apdufile)
 164     {
 165         FILE *f;
 166
 167         if (!(anew->print = odr_createmem(ODR_PRINT)))
 168             return 0;
 169         if (*apdufile == '@')
 170         {
 171             odr_setprint(anew->print, yaz_log_file());
 172         }
 173         else if (*apdufile != '-')
 174         {
 175             char filename[256];
 176             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 177             if (!(f = fopen(filename, "w")))
 178             {
 179                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 180                 return 0;
 181             }
 182             setvbuf(f, 0, _IONBF, 0);
 183             odr_setprint(anew->print, f);
 184         }
 185     }
 186     else
 187         anew->print = 0;
 188     anew->input_buffer = 0;
 189     anew->input_buffer_len = 0;
 190     anew->backend = 0;
 191     anew->state = ASSOC_NEW;
 192     request_initq(&anew->incoming);
 193     request_initq(&anew->outgoing);
 194     anew->proto = cs_getproto(link);
 195     anew->server = 0;
 196     return anew;
 197 }
 198
 199 /*
 200  * Free association and release resources.
 201  */
 202 void destroy_association(association *h)
 203 {
 204     statserv_options_block *cb = statserv_getcontrol();
 205     request *req;
 206
 207     xfree(h->init);
 208     odr_destroy(h->decode);
 209     odr_destroy(h->encode);
 210     if (h->print)
 211         odr_destroy(h->print);
 212     if (h->input_buffer)
 213     xfree(h->input_buffer);
 214     if (h->backend)
 215         (*cb->bend_close)(h->backend);
 216     while ((req = request_deq(&h->incoming)))
 217         request_release(req);
 218     while ((req = request_deq(&h->outgoing)))
 219         request_release(req);
 220     request_delq(&h->incoming);
 221     request_delq(&h->outgoing);
 222     xfree(h);
 223     xmalloc_trav("session closed");
 224     if (cb && cb->one_shot)
 225     {
 226         exit(0);
 227     }
 228 }
 229
 230 static void do_close_req(association *a, int reason, char *message,
 231                          request *req)
 232 {
 233     Z_APDU apdu;
 234     Z_Close *cls = zget_Close(a->encode);
 235
 236     /* Purge request queue */
 237     while (request_deq(&a->incoming));
 238     while (request_deq(&a->outgoing));
 239     if (a->version >= 3)
 240     {
 241         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 242             reason, message ? message : "none");
 243         apdu.which = Z_APDU_close;
 244         apdu.u.close = cls;
 245         *cls->closeReason = reason;
 246         cls->diagnosticInformation = message;
 247         process_z_response(a, req, &apdu);
 248         iochan_settimeout(a->client_chan, 20);
 249     }
 250     else
 251     {
 252         request_release(req);
 253         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 254         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 255         a->cs_put_mask = 0;
 256     }
 257     a->state = ASSOC_DEAD;
 258 }
 259
 260 static void do_close(association *a, int reason, char *message)
 261 {
 262     request *req = request_get(&a->outgoing);
 263     do_close_req (a, reason, message, req);
 264 }
 265
 266
 267 int ir_read(IOCHAN h, int event)
 268 {
 269     association *assoc = (association *)iochan_getdata(h);
 270     COMSTACK conn = assoc->client_link;
 271     request *req;
 272
 273     if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 274     {
 275         yaz_log(YLOG_DEBUG, "ir_session (input)");
 276         /* We aren't speaking to this fellow */
 277         if (assoc->state == ASSOC_DEAD)
 278         {
 279             yaz_log(log_sessiondetail, "Connection closed - end of session");
 280             cs_close(conn);
 281             destroy_association(assoc);
 282             iochan_destroy(h);
 283             return 0;
 284         }
 285         assoc->cs_get_mask = EVENT_INPUT;
 286
 287         do
 288         {
 289             int res = cs_get(conn, &assoc->input_buffer,
 290                              &assoc->input_buffer_len);
 291             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 292             {
 293                 yaz_log(log_session, "Connection error: %s res=%d",
 294                         cs_errmsg(cs_errno(conn)), res);
 295                 req = request_get(&assoc->incoming); /* get a new request */
 296                 do_close_req(assoc, Z_Close_protocolError,
 297                              "Incoming package too large", req);
 298                 return 0;
 299             }
 300             else if (res <= 0)
 301             {
 302                 yaz_log(log_session, "Connection closed by client");
 303                 assoc->state = ASSOC_DEAD;
 304                 return 0;
 305             }
 306             else if (res == 1) /* incomplete read - wait for more  */
 307             {
 308                 if (conn->io_pending & CS_WANT_WRITE)
 309                     assoc->cs_get_mask |= EVENT_OUTPUT;
 310                 iochan_setflag(h, assoc->cs_get_mask);
 311                 return 0;
 312             }
 313             /* we got a complete PDU. Let's decode it */
 314             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 315                     assoc->input_buffer[0] & 0xff,
 316                     assoc->input_buffer[1] & 0xff,
 317                     assoc->input_buffer[2] & 0xff);
 318             req = request_get(&assoc->incoming); /* get a new request */
 319             odr_reset(assoc->decode);
 320             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 321             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 322             {
 323                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 324                         "[near byte %ld] ",
 325                         odr_errmsg(odr_geterror(assoc->decode)),
 326                         odr_getelement(assoc->decode),
 327                         (long) odr_offset(assoc->decode));
 328                 if (assoc->decode->error != OHTTP)
 329                 {
 330                     yaz_log(YLOG_WARN, "PDU dump:");
 331                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 332                     request_release(req);
 333                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 334                 }
 335                 else
 336                 {
 337                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 338                     assoc->state = ASSOC_DEAD;
 339                     process_gdu_response(assoc, req, p);
 340                 }
 341                 return 0;
 342             }
 343             req->request_mem = odr_extract_mem(assoc->decode);
 344             if (assoc->print)
 345             {
 346                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 347                     yaz_log(YLOG_WARN, "ODR print error: %s",
 348                             odr_errmsg(odr_geterror(assoc->print)));
 349                 odr_reset(assoc->print);
 350             }
 351             request_enq(&assoc->incoming, req);
 352         }
 353         while (cs_more(conn));
 354     }
 355     return 1;
 356 }
 357
 358 /*
 359  * This is where PDUs from the client are read and the further
 360  * processing is initiated. Flow of control moves down through the
 361  * various process_* functions below, until the encoded result comes back up
 362  * to the output handler in here.
 363  *
 364  *  h     : the I/O channel that has an outstanding event.
 365  *  event : the current outstanding event.
 366  */
 367 void ir_session(IOCHAN h, int event)
 368 {
 369     int res;
 370     association *assoc = (association *)iochan_getdata(h);
 371     COMSTACK conn = assoc->client_link;
 372     request *req;
 373
 374     assert(h && conn && assoc);
 375     if (event == EVENT_TIMEOUT)
 376     {
 377         if (assoc->state != ASSOC_UP)
 378         {
 379             yaz_log(log_session, "Timeout. Closing connection");
 380             /* do we need to lod this at all */
 381             cs_close(conn);
 382             destroy_association(assoc);
 383             iochan_destroy(h);
 384         }
 385         else
 386         {
 387             yaz_log(log_sessiondetail, "Timeout. Sending Z39.50 Close");
 388             do_close(assoc, Z_Close_lackOfActivity, 0);
 389         }
 390         return;
 391     }
 392     if (event & assoc->cs_accept_mask)
 393     {
 394         if (!cs_accept(conn))
 395         {
 396             yaz_log(YLOG_WARN, "accept failed");
 397             destroy_association(assoc);
 398             iochan_destroy(h);
 399             return;
 400         }
 401         iochan_clearflag(h, EVENT_OUTPUT);
 402         if (conn->io_pending)
 403         {   /* cs_accept didn't complete */
 404             assoc->cs_accept_mask =
 405                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 406                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 407
 408             iochan_setflag(h, assoc->cs_accept_mask);
 409         }
 410         else
 411         {   /* cs_accept completed. Prepare for reading (cs_get) */
 412             assoc->cs_accept_mask = 0;
 413             assoc->cs_get_mask = EVENT_INPUT;
 414             iochan_setflag(h, assoc->cs_get_mask);
 415         }
 416         return;
 417     }
 418     if (event & assoc->cs_get_mask) /* input */
 419     {
 420         if (!ir_read(h, event))
 421             return;
 422         req = request_head(&assoc->incoming);
 423         if (req->state == REQUEST_IDLE)
 424         {
 425             request_deq(&assoc->incoming);
 426             process_gdu_request(assoc, req);
 427         }
 428     }
 429     if (event & assoc->cs_put_mask)
 430     {
 431         request *req = request_head(&assoc->outgoing);
 432
 433         assoc->cs_put_mask = 0;
 434         yaz_log(YLOG_DEBUG, "ir_session (output)");
 435         req->state = REQUEST_PENDING;
 436         switch (res = cs_put(conn, req->response, req->len_response))
 437         {
 438         case -1:
 439             yaz_log(log_sessiondetail, "Connection closed by client");
 440             cs_close(conn);
 441             destroy_association(assoc);
 442             iochan_destroy(h);
 443             break;
 444         case 0: /* all sent - release the request structure */
 445             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 446 #if 0
 447             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 448                     req->response);
 449 #endif
 450             nmem_destroy(req->request_mem);
 451             request_deq(&assoc->outgoing);
 452             request_release(req);
 453             if (!request_head(&assoc->outgoing))
 454             {   /* restore mask for cs_get operation ... */
 455                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 456                 iochan_setflag(h, assoc->cs_get_mask);
 457                 if (assoc->state == ASSOC_DEAD)
 458                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 459             }
 460             else
 461             {
 462                 assoc->cs_put_mask = EVENT_OUTPUT;
 463             }
 464             break;
 465         default:
 466             if (conn->io_pending & CS_WANT_WRITE)
 467                 assoc->cs_put_mask |= EVENT_OUTPUT;
 468             if (conn->io_pending & CS_WANT_READ)
 469                 assoc->cs_put_mask |= EVENT_INPUT;
 470             iochan_setflag(h, assoc->cs_put_mask);
 471         }
 472     }
 473     if (event & EVENT_EXCEPT)
 474     {
 475         yaz_log(YLOG_WARN, "ir_session (exception)");
 476         cs_close(conn);
 477         destroy_association(assoc);
 478         iochan_destroy(h);
 479     }
 480 }
 481
 482 static int process_z_request(association *assoc, request *req, char **msg);
 483
 484
 485 static void assoc_init_reset(association *assoc)
 486 {
 487     xfree (assoc->init);
 488     assoc->init = (bend_initrequest *) xmalloc(sizeof(*assoc->init));
 489
 490     assoc->init->stream = assoc->encode;
 491     assoc->init->print = assoc->print;
 492     assoc->init->auth = 0;
 493     assoc->init->referenceId = 0;
 494     assoc->init->implementation_version = 0;
 495     assoc->init->implementation_id = 0;
 496     assoc->init->implementation_name = 0;
 497     assoc->init->query_charset = 0;
 498     assoc->init->records_in_same_charset = 0;
 499     assoc->init->bend_sort = NULL;
 500     assoc->init->bend_search = NULL;
 501     assoc->init->bend_present = NULL;
 502     assoc->init->bend_esrequest = NULL;
 503     assoc->init->bend_delete = NULL;
 504     assoc->init->bend_scan = NULL;
 505     assoc->init->bend_segment = NULL;
 506     assoc->init->bend_fetch = NULL;
 507     assoc->init->bend_explain = NULL;
 508     assoc->init->bend_srw_scan = NULL;
 509     assoc->init->bend_srw_update = NULL;
 510     assoc->init->named_result_sets = 0;
 511
 512     assoc->init->charneg_request = NULL;
 513     assoc->init->charneg_response = NULL;
 514
 515     assoc->init->decode = assoc->decode;
 516     assoc->init->peer_name =
 517         odr_strdup(assoc->encode, cs_addrstr(assoc->client_link));
 518
 519     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 520 }
 521
 522 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 523 {
 524     statserv_options_block *cb = statserv_getcontrol();
 525     if (!assoc->init)
 526     {
 527         const char *encoding = "UTF-8";
 528         Z_External *ce;
 529         bend_initresult *binitres;
 530
 531         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 532         assoc_init_reset(assoc);
 533
 534         if (sr->username)
 535         {
 536             Z_IdAuthentication *auth = (Z_IdAuthentication *)
 537                 odr_malloc(assoc->decode, sizeof(*auth));
 538             int len;
 539
 540             len = strlen(sr->username) + 1;
 541             if (sr->password)
 542                 len += strlen(sr->password) + 2;
 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 && rr->len > 0)
 644     {   /* post conversion must take place .. */
 645         WRBUF output_record = wrbuf_alloc();
 646         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 647         if (r)
 648         {
 649             const char *details = yaz_record_conv_get_error(rc);
 650             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 651             if (details)
 652                 rr->errstring = odr_strdup(rr->stream, details);
 653         }
 654         else
 655         {
 656             rr->len = wrbuf_len(output_record);
 657             rr->record = (char *) odr_malloc(rr->stream, rr->len);
 658             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 659         }
 660         wrbuf_destroy(output_record);
 661     }
 662     if (match_syntax)
 663         rr->output_format = match_syntax;
 664     if (match_schema)
 665         rr->schema = odr_strdup(rr->stream, match_schema);
 666 #else
 667     (*assoc->init->bend_fetch)(assoc->backend, rr);
 668 #endif
 669     return 0;
 670 }
 671
 672 static int srw_bend_fetch(association *assoc, int pos,
 673                           Z_SRW_searchRetrieveRequest *srw_req,
 674                           Z_SRW_record *record,
 675                           const char **addinfo)
 676 {
 677     bend_fetch_rr rr;
 678     ODR o = assoc->encode;
 679
 680     rr.setname = "default";
 681     rr.number = pos;
 682     rr.referenceId = 0;
 683     rr.request_format = odr_oiddup(assoc->decode, yaz_oid_recsyn_xml);
 684
 685     rr.comp = (Z_RecordComposition *)
 686             odr_malloc(assoc->decode, sizeof(*rr.comp));
 687     rr.comp->which = Z_RecordComp_complex;
 688     rr.comp->u.complex = (Z_CompSpec *)
 689             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 690     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 691         odr_malloc(assoc->encode, sizeof(bool_t));
 692     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 693     rr.comp->u.complex->num_dbSpecific = 0;
 694     rr.comp->u.complex->dbSpecific = 0;
 695     rr.comp->u.complex->num_recordSyntax = 0;
 696     rr.comp->u.complex->recordSyntax = 0;
 697
 698     rr.comp->u.complex->generic = (Z_Specification *)
 699             odr_malloc(assoc->decode, sizeof(Z_Specification));
 700
 701     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 702     rr.comp->u.complex->generic->which = Z_Schema_uri;
 703     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 704
 705     /* ESN = recordSchema if recordSchema is present */
 706     rr.comp->u.complex->generic->elementSpec = 0;
 707     if (srw_req->recordSchema)
 708     {
 709         rr.comp->u.complex->generic->elementSpec =
 710             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 711         rr.comp->u.complex->generic->elementSpec->which =
 712             Z_ElementSpec_elementSetName;
 713         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 714             srw_req->recordSchema;
 715     }
 716
 717     rr.stream = assoc->encode;
 718     rr.print = assoc->print;
 719
 720     rr.basename = 0;
 721     rr.len = 0;
 722     rr.record = 0;
 723     rr.last_in_set = 0;
 724     rr.errcode = 0;
 725     rr.errstring = 0;
 726     rr.surrogate_flag = 0;
 727     rr.schema = srw_req->recordSchema;
 728
 729     if (!assoc->init->bend_fetch)
 730         return 1;
 731
 732     retrieve_fetch(assoc, &rr);
 733
 734     if (rr.errcode && rr.surrogate_flag)
 735     {
 736         int code = yaz_diag_bib1_to_srw(rr.errcode);
 737         yaz_mk_sru_surrogate(o, record, pos, code, rr.errstring);
 738         return 0;
 739     }
 740     else if (rr.len >= 0)
 741     {
 742         record->recordData_buf = rr.record;
 743         record->recordData_len = rr.len;
 744         record->recordPosition = odr_intdup(o, pos);
 745         record->recordSchema = odr_strdup_null(
 746             o, rr.schema ? rr.schema : srw_req->recordSchema);
 747     }
 748     if (rr.errcode)
 749     {
 750         *addinfo = rr.errstring;
 751         return rr.errcode;
 752     }
 753     return 0;
 754 }
 755
 756 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 757                    Z_Query *query_result)
 758 {
 759     /* have a CQL query and  CQL to PQF transform .. */
 760     CQL_parser cp = cql_parser_create();
 761     int r;
 762     int srw_errcode = 0;
 763     const char *add = 0;
 764     char rpn_buf[5120];
 765
 766     r = cql_parser_string(cp, cql);
 767     if (r)
 768     {
 769         srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 770     }
 771     if (!r)
 772     {
 773         /* Syntax OK */
 774         r = cql_transform_buf(ct,
 775                               cql_parser_result(cp),
 776                               rpn_buf, sizeof(rpn_buf)-1);
 777         if (r)
 778             srw_errcode = cql_transform_error(ct, &add);
 779     }
 780     if (!r)
 781     {
 782         /* Syntax & transform OK. */
 783         /* Convert PQF string to Z39.50 to RPN query struct */
 784         YAZ_PQF_Parser pp = yaz_pqf_create();
 785         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 786         if (!rpnquery)
 787         {
 788             size_t off;
 789             const char *pqf_msg;
 790             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 791             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 792                     pqf_msg, code);
 793             srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 794         }
 795         else
 796         {
 797             query_result->which = Z_Query_type_1;
 798             query_result->u.type_1 = rpnquery;
 799         }
 800         yaz_pqf_destroy(pp);
 801     }
 802     cql_parser_destroy(cp);
 803     return srw_errcode;
 804 }
 805
 806 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 807                         Z_AttributesPlusTerm *result)
 808 {
 809     Z_Query query;
 810     Z_RPNQuery *rpn;
 811     int srw_error = cql2pqf(odr, cql, ct, &query);
 812     if (srw_error)
 813         return srw_error;
 814     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 815         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* bad query type */
 816     rpn = query.u.type_1;
 817     if (!rpn->RPNStructure)
 818         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be structure */
 819     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 820         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be simple */
 821     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 822         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be be attributes + term */
 823     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 824            sizeof(*result));
 825     return 0;
 826 }
 827
 828
 829 static int ccl2pqf(ODR odr, const Odr_oct *ccl, CCL_bibset bibset,
 830                    bend_search_rr *bsrr) {
 831     char *ccl0;
 832     struct ccl_rpn_node *node;
 833     int errcode, pos;
 834
 835     ccl0 = odr_strdupn(odr, (char*) ccl->buf, ccl->len);
 836     if ((node = ccl_find_str(bibset, ccl0, &errcode, &pos)) == 0) {
 837         bsrr->errstring = (char*) ccl_err_msg(errcode);
 838         return YAZ_SRW_QUERY_SYNTAX_ERROR;    /* Query syntax error */
 839     }
 840
 841     bsrr->query->which = Z_Query_type_1;
 842     bsrr->query->u.type_1 = ccl_rpn_query(odr, node);
 843     return 0;
 844 }
 845
 846
 847 static void srw_bend_search(association *assoc, request *req,
 848                             Z_SRW_PDU *sr,
 849                             Z_SRW_PDU *res,
 850                             int *http_code)
 851 {
 852     Z_SRW_searchRetrieveResponse *srw_res = res->u.response;
 853     int srw_error = 0;
 854     Z_External *ext;
 855     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 856
 857     *http_code = 200;
 858     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 859     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 860     if (srw_res->num_diagnostics == 0 && assoc->init)
 861     {
 862         bend_search_rr rr;
 863         rr.setname = "default";
 864         rr.replace_set = 1;
 865         rr.num_bases = 1;
 866         rr.basenames = &srw_req->database;
 867         rr.referenceId = 0;
 868         rr.srw_sortKeys = 0;
 869         rr.srw_setname = 0;
 870         rr.srw_setnameIdleTime = 0;
 871         rr.estimated_hit_count = 0;
 872         rr.partial_resultset = 0;
 873         rr.query = (Z_Query *) odr_malloc(assoc->decode, sizeof(*rr.query));
 874         rr.query->u.type_1 = 0;
 875         rr.extra_args = sr->extra_args;
 876         rr.extra_response_data = 0;
 877
 878         if (srw_req->query_type == Z_SRW_query_type_cql)
 879         {
 880             if (assoc->server && assoc->server->cql_transform)
 881             {
 882                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 883                                           assoc->server->cql_transform,
 884                                           rr.query);
 885                 if (srw_errcode)
 886                 {
 887                     yaz_add_srw_diagnostic(assoc->encode,
 888                                            &srw_res->diagnostics,
 889                                            &srw_res->num_diagnostics,
 890                                            srw_errcode, 0);
 891                 }
 892             }
 893             else
 894             {
 895                 /* CQL query to backend. Wrap it - Z39.50 style */
 896                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 897                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 898                                                         "1.2.840.10003.16.2");
 899                 ext->indirect_reference = 0;
 900                 ext->descriptor = 0;
 901                 ext->which = Z_External_CQL;
 902                 ext->u.cql = srw_req->query.cql;
 903
 904                 rr.query->which = Z_Query_type_104;
 905                 rr.query->u.type_104 =  ext;
 906             }
 907         }
 908         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 909         {
 910             Z_RPNQuery *RPNquery;
 911             YAZ_PQF_Parser pqf_parser;
 912
 913             pqf_parser = yaz_pqf_create();
 914
 915             RPNquery = yaz_pqf_parse(pqf_parser, assoc->decode,
 916                                      srw_req->query.pqf);
 917             if (!RPNquery)
 918             {
 919                 const char *pqf_msg;
 920                 size_t off;
 921                 int code = yaz_pqf_error(pqf_parser, &pqf_msg, &off);
 922                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 923                         code, pqf_msg, (long) off);
 924                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 925             }
 926
 927             rr.query->which = Z_Query_type_1;
 928             rr.query->u.type_1 =  RPNquery;
 929
 930             yaz_pqf_destroy(pqf_parser);
 931         }
 932         else
 933         {
 934             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 935                                    &srw_res->num_diagnostics,
 936                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 937         }
 938         if (rr.query->u.type_1)
 939         {
 940             rr.stream = assoc->encode;
 941             rr.decode = assoc->decode;
 942             rr.print = assoc->print;
 943             rr.request = req;
 944             if ( srw_req->sort.sortKeys )
 945                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 946                                              srw_req->sort.sortKeys );
 947             rr.association = assoc;
 948             rr.fd = 0;
 949             rr.hits = 0;
 950             rr.errcode = 0;
 951             rr.errstring = 0;
 952             rr.search_info = 0;
 953             yaz_log_zquery_level(log_requestdetail,rr.query);
 954
 955             (assoc->init->bend_search)(assoc->backend, &rr);
 956             if (rr.errcode)
 957             {
 958                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 959                 {
 960                     *http_code = 404;
 961                 }
 962                 else
 963                 {
 964                     srw_error = yaz_diag_bib1_to_srw(rr.errcode);
 965                     yaz_add_srw_diagnostic(assoc->encode,
 966                                            &srw_res->diagnostics,
 967                                            &srw_res->num_diagnostics,
 968                                            srw_error, rr.errstring);
 969                 }
 970             }
 971             else
 972             {
 973                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
 974                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
 975
 976                 yaz_log(log_requestdetail, "Request to pack %d+%d out of "
 977                         ODR_INT_PRINTF,
 978                         start, number, rr.hits);
 979
 980                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 981                 if (rr.srw_setname)
 982                 {
 983                     srw_res->resultSetId =
 984                         odr_strdup(assoc->encode, rr.srw_setname );
 985                     srw_res->resultSetIdleTime =
 986                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
 987                 }
 988
 989                 if (start > rr.hits || start < 1)
 990                 {
 991                     /* if hits<=0 and start=1 we don't return a diagnostic */
 992                     if (start != 1)
 993                         yaz_add_srw_diagnostic(
 994                             assoc->encode,
 995                             &srw_res->diagnostics, &srw_res->num_diagnostics,
 996                             YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
 997                 }
 998                 else if (number > 0)
 999                 {
1000                     int i;
1001                     int ok = 1;
1002                     if (start + number > rr.hits)
1003                         number = rr.hits - start + 1;
1004
1005                     /* Call bend_present if defined */
1006                     if (assoc->init->bend_present)
1007                     {
1008                         bend_present_rr *bprr = (bend_present_rr*)
1009                             odr_malloc(assoc->decode, sizeof(*bprr));
1010                         bprr->setname = "default";
1011                         bprr->start = start;
1012                         bprr->number = number;
1013                         if (srw_req->recordSchema)
1014                         {
1015                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1016                                                                             sizeof(*bprr->comp));
1017                             bprr->comp->which = Z_RecordComp_simple;
1018                             bprr->comp->u.simple = (Z_ElementSetNames *)
1019                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1020                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1021                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1022                         }
1023                         else
1024                         {
1025                             bprr->comp = 0;
1026                         }
1027                         bprr->stream = assoc->encode;
1028                         bprr->referenceId = 0;
1029                         bprr->print = assoc->print;
1030                         bprr->request = req;
1031                         bprr->association = assoc;
1032                         bprr->errcode = 0;
1033                         bprr->errstring = NULL;
1034                         (*assoc->init->bend_present)(assoc->backend, bprr);
1035
1036                         if (!bprr->request)
1037                             return;
1038                         if (bprr->errcode)
1039                         {
1040                             srw_error = yaz_diag_bib1_to_srw(bprr->errcode);
1041                             yaz_add_srw_diagnostic(assoc->encode,
1042                                                    &srw_res->diagnostics,
1043                                                    &srw_res->num_diagnostics,
1044                                                    srw_error, bprr->errstring);
1045                             ok = 0;
1046                         }
1047                     }
1048
1049                     if (ok)
1050                     {
1051                         int j = 0;
1052                         int packing = Z_SRW_recordPacking_string;
1053                         if (srw_req->recordPacking)
1054                         {
1055                             packing =
1056                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1057                             if (packing == -1)
1058                                 packing = Z_SRW_recordPacking_string;
1059                         }
1060                         srw_res->records = (Z_SRW_record *)
1061                             odr_malloc(assoc->encode,
1062                                        number * sizeof(*srw_res->records));
1063
1064                         srw_res->extra_records = (Z_SRW_extra_record **)
1065                             odr_malloc(assoc->encode,
1066                                        number*sizeof(*srw_res->extra_records));
1067
1068                         for (i = 0; i<number; i++)
1069                         {
1070                             int errcode;
1071                             const char *addinfo = 0;
1072
1073                             srw_res->records[j].recordPacking = packing;
1074                             srw_res->records[j].recordData_buf = 0;
1075                             srw_res->extra_records[j] = 0;
1076                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1077                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1078                                                      srw_res->records + j,
1079                                                      &addinfo);
1080                             if (errcode)
1081                             {
1082                                 yaz_add_srw_diagnostic(assoc->encode,
1083                                                        &srw_res->diagnostics,
1084                                                        &srw_res->num_diagnostics,
1085                                                        yaz_diag_bib1_to_srw(errcode),
1086                                                        addinfo);
1087
1088                                 break;
1089                             }
1090                             if (srw_res->records[j].recordData_buf)
1091                                 j++;
1092                         }
1093                         srw_res->num_records = j;
1094                         if (!j)
1095                             srw_res->records = 0;
1096                     }
1097                 }
1098                 if (rr.extra_response_data)
1099                 {
1100                     res->extraResponseData_buf = rr.extra_response_data;
1101                     res->extraResponseData_len = strlen(rr.extra_response_data);
1102                 }
1103                 if (rr.estimated_hit_count || rr.partial_resultset)
1104                 {
1105                     yaz_add_srw_diagnostic(
1106                         assoc->encode,
1107                         &srw_res->diagnostics,
1108                         &srw_res->num_diagnostics,
1109                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1110                         0);
1111                 }
1112             }
1113         }
1114     }
1115     if (log_request)
1116     {
1117         const char *querystr = "?";
1118         const char *querytype = "?";
1119         WRBUF wr = wrbuf_alloc();
1120
1121         switch (srw_req->query_type)
1122         {
1123         case Z_SRW_query_type_cql:
1124             querytype = "CQL";
1125             querystr = srw_req->query.cql;
1126             break;
1127         case Z_SRW_query_type_pqf:
1128             querytype = "PQF";
1129             querystr = srw_req->query.pqf;
1130             break;
1131         }
1132         wrbuf_printf(wr, "SRWSearch %s ", srw_req->database);
1133         if (srw_res->num_diagnostics)
1134             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1135         else if (*http_code != 200)
1136             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1137         else if (srw_res->numberOfRecords)
1138         {
1139             wrbuf_printf(wr, "OK " ODR_INT_PRINTF,
1140                          (srw_res->numberOfRecords ?
1141                           *srw_res->numberOfRecords : 0));
1142         }
1143         wrbuf_printf(wr, " %s " ODR_INT_PRINTF " +%d",
1144                      (srw_res->resultSetId ?
1145                       srw_res->resultSetId : "-"),
1146                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1147                      srw_res->num_records);
1148         yaz_log(log_request, "%s %s: %s", wrbuf_cstr(wr), querytype, querystr);
1149         wrbuf_destroy(wr);
1150     }
1151 }
1152
1153 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1154 {
1155 #if YAZ_HAVE_XML2
1156     xmlNodePtr ptr = (xmlNode *) rr->server_node_ptr;
1157     if (!ptr)
1158         return 0;
1159     for (ptr = ptr->children; ptr; ptr = ptr->next)
1160     {
1161         if (ptr->type != XML_ELEMENT_NODE)
1162             continue;
1163         if (!strcmp((const char *) ptr->name, "explain"))
1164         {
1165             int len;
1166             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1167             xmlChar *buf_out;
1168             char *content;
1169
1170             ptr = xmlCopyNode(ptr, 1);
1171
1172             xmlDocSetRootElement(doc, ptr);
1173
1174             xmlDocDumpMemory(doc, &buf_out, &len);
1175             content = (char*) odr_malloc(rr->stream, 1+len);
1176             memcpy(content, buf_out, len);
1177             content[len] = '\0';
1178
1179             xmlFree(buf_out);
1180             xmlFreeDoc(doc);
1181             rr->explain_buf = content;
1182             return 0;
1183         }
1184     }
1185 #endif
1186     return 0;
1187 }
1188
1189 static void srw_bend_explain(association *assoc, request *req,
1190                              Z_SRW_PDU *sr,
1191                              Z_SRW_explainResponse *srw_res,
1192                              int *http_code)
1193 {
1194     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1195     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1196     *http_code = 404;
1197     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1198     if (assoc->init)
1199     {
1200         bend_explain_rr rr;
1201
1202         rr.stream = assoc->encode;
1203         rr.decode = assoc->decode;
1204         rr.print = assoc->print;
1205         rr.explain_buf = 0;
1206         rr.database = srw_req->database;
1207         if (assoc->server)
1208             rr.server_node_ptr = assoc->server->server_node_ptr;
1209         else
1210             rr.server_node_ptr = 0;
1211         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1212         if (assoc->init->bend_explain)
1213             (*assoc->init->bend_explain)(assoc->backend, &rr);
1214         else
1215             srw_bend_explain_default(assoc->backend, &rr);
1216
1217         if (rr.explain_buf)
1218         {
1219             int packing = Z_SRW_recordPacking_string;
1220             if (srw_req->recordPacking)
1221             {
1222                 packing =
1223                     yaz_srw_str_to_pack(srw_req->recordPacking);
1224                 if (packing == -1)
1225                     packing = Z_SRW_recordPacking_string;
1226             }
1227             srw_res->record.recordSchema = rr.schema;
1228             srw_res->record.recordPacking = packing;
1229             srw_res->record.recordData_buf = rr.explain_buf;
1230             srw_res->record.recordData_len = strlen(rr.explain_buf);
1231             srw_res->record.recordPosition = 0;
1232             *http_code = 200;
1233         }
1234     }
1235 }
1236
1237 static void srw_bend_scan(association *assoc, request *req,
1238                           Z_SRW_PDU *sr,
1239                           Z_SRW_scanResponse *srw_res,
1240                           int *http_code)
1241 {
1242     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1243     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1244
1245     *http_code = 200;
1246     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1247     if (srw_res->num_diagnostics == 0 && assoc->init)
1248     {
1249         struct scan_entry *save_entries;
1250
1251         bend_scan_rr *bsrr = (bend_scan_rr *)
1252             odr_malloc(assoc->encode, sizeof(*bsrr));
1253         bsrr->num_bases = 1;
1254         bsrr->basenames = &srw_req->database;
1255
1256         bsrr->num_entries = srw_req->maximumTerms ?
1257             *srw_req->maximumTerms : 10;
1258         bsrr->term_position = srw_req->responsePosition ?
1259             *srw_req->responsePosition : 1;
1260
1261         bsrr->errcode = 0;
1262         bsrr->errstring = 0;
1263         bsrr->referenceId = 0;
1264         bsrr->stream = assoc->encode;
1265         bsrr->print = assoc->print;
1266         bsrr->step_size = odr_intdup(assoc->decode, 0);
1267         bsrr->entries = 0;
1268         bsrr->setname = 0;
1269
1270         if (bsrr->num_entries > 0)
1271         {
1272             int i;
1273             bsrr->entries = (struct scan_entry *)
1274                 odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1275                            bsrr->num_entries);
1276             for (i = 0; i<bsrr->num_entries; i++)
1277             {
1278                 bsrr->entries[i].term = 0;
1279                 bsrr->entries[i].occurrences = 0;
1280                 bsrr->entries[i].errcode = 0;
1281                 bsrr->entries[i].errstring = 0;
1282                 bsrr->entries[i].display_term = 0;
1283             }
1284         }
1285         save_entries = bsrr->entries;  /* save it so we can compare later */
1286
1287         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1288             assoc->init->bend_scan)
1289         {
1290             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1291
1292             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1293                                       &bsrr->attributeset,
1294                                       srw_req->scanClause.pqf);
1295             yaz_pqf_destroy(pqf_parser);
1296             bsrr->scanClause = 0;
1297             ((int (*)(void *, bend_scan_rr *))
1298              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1299         }
1300         else if (srw_req->query_type == Z_SRW_query_type_cql
1301                  && assoc->init->bend_scan && assoc->server
1302                  && assoc->server->cql_transform)
1303         {
1304             int srw_error;
1305             bsrr->scanClause = 0;
1306             bsrr->attributeset = 0;
1307             bsrr->term = (Z_AttributesPlusTerm *)
1308                 odr_malloc(assoc->decode, sizeof(*bsrr->term));
1309             srw_error = cql2pqf_scan(assoc->encode,
1310                                      srw_req->scanClause.cql,
1311                                      assoc->server->cql_transform,
1312                                      bsrr->term);
1313             if (srw_error)
1314                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1315                                        &srw_res->num_diagnostics,
1316                                        srw_error, 0);
1317             else
1318             {
1319                 ((int (*)(void *, bend_scan_rr *))
1320                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1321             }
1322         }
1323         else if (srw_req->query_type == Z_SRW_query_type_cql
1324                  && assoc->init->bend_srw_scan)
1325         {
1326             bsrr->term = 0;
1327             bsrr->attributeset = 0;
1328             bsrr->scanClause = srw_req->scanClause.cql;
1329             ((int (*)(void *, bend_scan_rr *))
1330              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1331         }
1332         else
1333         {
1334             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1335                                    &srw_res->num_diagnostics,
1336                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1337         }
1338         if (bsrr->errcode)
1339         {
1340             int srw_error;
1341             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1342             {
1343                 *http_code = 404;
1344                 return;
1345             }
1346             srw_error = yaz_diag_bib1_to_srw(bsrr->errcode);
1347
1348             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1349                                    &srw_res->num_diagnostics,
1350                                    srw_error, bsrr->errstring);
1351         }
1352         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1353         {
1354             int i;
1355             srw_res->terms = (Z_SRW_scanTerm*)
1356                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1357                            bsrr->num_entries);
1358
1359             srw_res->num_terms =  bsrr->num_entries;
1360             for (i = 0; i<bsrr->num_entries; i++)
1361             {
1362                 Z_SRW_scanTerm *t = srw_res->terms + i;
1363                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1364                 t->numberOfRecords =
1365                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1366                 t->displayTerm = 0;
1367                 if (save_entries == bsrr->entries &&
1368                     bsrr->entries[i].display_term)
1369                 {
1370                     /* the entries was _not_ set by the handler. So it's
1371                        safe to test for new member display_term. It is
1372                        NULL'ed by us.
1373                     */
1374                     t->displayTerm = odr_strdup(assoc->encode,
1375                                                 bsrr->entries[i].display_term);
1376                 }
1377                 t->whereInList = 0;
1378             }
1379         }
1380     }
1381     if (log_request)
1382     {
1383         WRBUF wr = wrbuf_alloc();
1384         const char *querytype = 0;
1385         const char *querystr = 0;
1386
1387         switch(srw_req->query_type)
1388         {
1389         case Z_SRW_query_type_pqf:
1390             querytype = "PQF";
1391             querystr = srw_req->scanClause.pqf;
1392             break;
1393         case Z_SRW_query_type_cql:
1394             querytype = "CQL";
1395             querystr = srw_req->scanClause.cql;
1396             break;
1397         default:
1398             querytype = "UNKNOWN";
1399             querystr = "";
1400         }
1401
1402         wrbuf_printf(wr, "SRWScan %s ", srw_req->database);
1403
1404         if (srw_res->num_diagnostics)
1405             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1406         else if (srw_res->num_terms)
1407             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1408         else
1409             wrbuf_printf(wr, "OK - - ");
1410
1411         wrbuf_printf(wr, ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
1412                      (srw_req->responsePosition ?
1413                       *srw_req->responsePosition : 1),
1414                      (srw_req->maximumTerms ?
1415                       *srw_req->maximumTerms : 1));
1416         /* there is no step size in SRU/W ??? */
1417         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1418         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1419         wrbuf_destroy(wr);
1420     }
1421
1422 }
1423
1424 static void srw_bend_update(association *assoc, request *req,
1425                             Z_SRW_PDU *sr,
1426                             Z_SRW_updateResponse *srw_res,
1427                             int *http_code)
1428 {
1429     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1430     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1431     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1432     *http_code = 404;
1433     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1434     if (assoc->init)
1435     {
1436         bend_update_rr rr;
1437         Z_SRW_extra_record *extra = srw_req->extra_record;
1438
1439         rr.stream = assoc->encode;
1440         rr.print = assoc->print;
1441         rr.num_bases = 1;
1442         rr.basenames = &srw_req->database;
1443         rr.operation = srw_req->operation;
1444         rr.operation_status = "failed";
1445         rr.record_id = 0;
1446         rr.record_versions = 0;
1447         rr.num_versions = 0;
1448         rr.record_packing = "string";
1449         rr.record_schema = 0;
1450         rr.record_data = 0;
1451         rr.extra_record_data = 0;
1452         rr.extra_request_data = 0;
1453         rr.extra_response_data = 0;
1454         rr.uri = 0;
1455         rr.message = 0;
1456         rr.details = 0;
1457
1458         *http_code = 200;
1459         if (rr.operation == 0)
1460         {
1461             yaz_add_sru_update_diagnostic(
1462                 assoc->encode, &srw_res->diagnostics,
1463                 &srw_res->num_diagnostics,
1464                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1465                 "action" );
1466             return;
1467         }
1468         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1469         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1470         if (!strcmp( rr.operation, "delete"))
1471         {
1472             if (srw_req->record && !srw_req->record->recordSchema)
1473             {
1474                 rr.record_schema = odr_strdup(
1475                     assoc->encode,
1476                     srw_req->record->recordSchema);
1477             }
1478             if (srw_req->record)
1479             {
1480                 rr.record_data = odr_strdupn(
1481                     assoc->encode,
1482                     srw_req->record->recordData_buf,
1483                     srw_req->record->recordData_len );
1484             }
1485             if (extra && extra->extraRecordData_len)
1486             {
1487                 rr.extra_record_data = odr_strdupn(
1488                     assoc->encode,
1489                     extra->extraRecordData_buf,
1490                     extra->extraRecordData_len );
1491             }
1492             if (srw_req->recordId)
1493                 rr.record_id = srw_req->recordId;
1494             else if (extra && extra->recordIdentifier)
1495                 rr.record_id = extra->recordIdentifier;
1496         }
1497         else if (!strcmp(rr.operation, "replace"))
1498         {
1499             if (srw_req->recordId)
1500                 rr.record_id = srw_req->recordId;
1501             else if (extra && extra->recordIdentifier)
1502                 rr.record_id = extra->recordIdentifier;
1503             else
1504             {
1505                 yaz_add_sru_update_diagnostic(
1506                     assoc->encode, &srw_res->diagnostics,
1507                     &srw_res->num_diagnostics,
1508                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1509                     "recordIdentifier");
1510             }
1511             if (!srw_req->record)
1512             {
1513                 yaz_add_sru_update_diagnostic(
1514                     assoc->encode, &srw_res->diagnostics,
1515                     &srw_res->num_diagnostics,
1516                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1517                     "record");
1518             }
1519             else
1520             {
1521                 if (srw_req->record->recordSchema)
1522                     rr.record_schema = odr_strdup(
1523                         assoc->encode, srw_req->record->recordSchema);
1524                 if (srw_req->record->recordData_len )
1525                 {
1526                     rr.record_data = odr_strdupn(assoc->encode,
1527                                                  srw_req->record->recordData_buf,
1528                                                  srw_req->record->recordData_len );
1529                 }
1530                 else
1531                 {
1532                     yaz_add_sru_update_diagnostic(
1533                         assoc->encode, &srw_res->diagnostics,
1534                         &srw_res->num_diagnostics,
1535                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1536                         "recordData" );
1537                 }
1538             }
1539             if (extra && extra->extraRecordData_len)
1540             {
1541                 rr.extra_record_data = odr_strdupn(
1542                     assoc->encode,
1543                     extra->extraRecordData_buf,
1544                     extra->extraRecordData_len );
1545             }
1546         }
1547         else if (!strcmp(rr.operation, "insert"))
1548         {
1549             if (srw_req->recordId)
1550                 rr.record_id = srw_req->recordId;
1551             else if (extra)
1552                 rr.record_id = extra->recordIdentifier;
1553
1554             if (srw_req->record)
1555             {
1556                 if (srw_req->record->recordSchema)
1557                     rr.record_schema = odr_strdup(
1558                         assoc->encode, srw_req->record->recordSchema);
1559
1560                 if (srw_req->record->recordData_len)
1561                     rr.record_data = odr_strdupn(
1562                         assoc->encode,
1563                         srw_req->record->recordData_buf,
1564                         srw_req->record->recordData_len );
1565             }
1566             if (extra && extra->extraRecordData_len)
1567             {
1568                 rr.extra_record_data = odr_strdupn(
1569                     assoc->encode,
1570                     extra->extraRecordData_buf,
1571                     extra->extraRecordData_len );
1572             }
1573         }
1574         else
1575             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1576                                           &srw_res->num_diagnostics,
1577                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1578                                           rr.operation );
1579
1580         if (srw_req->record)
1581         {
1582             const char *pack_str =
1583                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1584             if (pack_str)
1585                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1586         }
1587
1588         if (srw_req->num_recordVersions)
1589         {
1590             rr.record_versions = srw_req->recordVersions;
1591             rr.num_versions = srw_req->num_recordVersions;
1592         }
1593         if (srw_req->extraRequestData_len)
1594         {
1595             rr.extra_request_data = odr_strdupn(assoc->encode,
1596                                                 srw_req->extraRequestData_buf,
1597                                                 srw_req->extraRequestData_len );
1598         }
1599         if (srw_res->num_diagnostics == 0)
1600         {
1601             if ( assoc->init->bend_srw_update)
1602                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1603             else
1604                 yaz_add_sru_update_diagnostic(
1605                     assoc->encode, &srw_res->diagnostics,
1606                     &srw_res->num_diagnostics,
1607                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1608                     "No Update backend handler");
1609         }
1610
1611         if (rr.uri)
1612             yaz_add_srw_diagnostic_uri(assoc->encode,
1613                                        &srw_res->diagnostics,
1614                                        &srw_res->num_diagnostics,
1615                                        rr.uri,
1616                                        rr.message,
1617                                        rr.details);
1618         srw_res->recordId = rr.record_id;
1619         srw_res->operationStatus = rr.operation_status;
1620         srw_res->recordVersions = rr.record_versions;
1621         srw_res->num_recordVersions = rr.num_versions;
1622         if (srw_res->extraResponseData_len)
1623         {
1624             srw_res->extraResponseData_buf = rr.extra_response_data;
1625             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1626         }
1627         if (srw_res->num_diagnostics == 0 && rr.record_data)
1628         {
1629             srw_res->record = yaz_srw_get_record(assoc->encode);
1630             srw_res->record->recordSchema = rr.record_schema;
1631             if (rr.record_packing)
1632             {
1633                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1634
1635                 if (pack == -1)
1636                 {
1637                     pack = Z_SRW_recordPacking_string;
1638                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1639                             rr.record_packing);
1640                 }
1641                 srw_res->record->recordPacking = pack;
1642             }
1643             srw_res->record->recordData_buf = rr.record_data;
1644             srw_res->record->recordData_len = strlen(rr.record_data);
1645             if (rr.extra_record_data)
1646             {
1647                 Z_SRW_extra_record *ex =
1648                     yaz_srw_get_extra_record(assoc->encode);
1649                 srw_res->extra_record = ex;
1650                 ex->extraRecordData_buf = rr.extra_record_data;
1651                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1652             }
1653         }
1654     }
1655 }
1656
1657 /* check if path is OK (1); BAD (0) */
1658 static int check_path(const char *path)
1659 {
1660     if (*path != '/')
1661         return 0;
1662     if (strstr(path, ".."))
1663         return 0;
1664     return 1;
1665 }
1666
1667 static char *read_file(const char *fname, ODR o, size_t *sz)
1668 {
1669     char *buf;
1670     FILE *inf = fopen(fname, "rb");
1671     if (!inf)
1672         return 0;
1673
1674     fseek(inf, 0L, SEEK_END);
1675     *sz = ftell(inf);
1676     rewind(inf);
1677     buf = (char *) odr_malloc(o, *sz);
1678     if (fread(buf, 1, *sz, inf) != *sz)
1679         yaz_log(YLOG_WARN|YLOG_ERRNO, "short read %s", fname);
1680     fclose(inf);
1681     return buf;
1682 }
1683
1684 static void process_http_request(association *assoc, request *req)
1685 {
1686     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1687     ODR o = assoc->encode;
1688     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1689     Z_SRW_PDU *sr = 0;
1690     Z_SOAP *soap_package = 0;
1691     Z_GDU *p = 0;
1692     char *charset = 0;
1693     Z_HTTP_Response *hres = 0;
1694     int keepalive = 1;
1695     const char *stylesheet = 0; /* for now .. set later */
1696     Z_SRW_diagnostic *diagnostic = 0;
1697     int num_diagnostic = 0;
1698     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1699
1700     yaz_log(log_request, "%s %s HTTP/%s", hreq->method, hreq->path, hreq->version);
1701     if (!control_association(assoc, host, 0))
1702     {
1703         p = z_get_HTTP_Response(o, 404);
1704         r = 1;
1705     }
1706     if (r == 2 && assoc->server && assoc->server->docpath
1707         && hreq->path[0] == '/'
1708         &&
1709         /* check if path is a proper prefix of documentroot */
1710         strncmp(hreq->path+1, assoc->server->docpath,
1711                 strlen(assoc->server->docpath))
1712         == 0)
1713     {
1714         if (!check_path(hreq->path))
1715         {
1716             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1717             p = z_get_HTTP_Response(o, 404);
1718         }
1719         else
1720         {
1721             size_t content_size = 0;
1722             char *content_buf = read_file(hreq->path+1, o, &content_size);
1723             if (!content_buf)
1724             {
1725                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1726                 p = z_get_HTTP_Response(o, 404);
1727             }
1728             else
1729             {
1730                 const char *ctype = 0;
1731                 yaz_mime_types types = yaz_mime_types_create();
1732
1733                 yaz_mime_types_add(types, "xsl", "application/xml");
1734                 yaz_mime_types_add(types, "xml", "application/xml");
1735                 yaz_mime_types_add(types, "css", "text/css");
1736                 yaz_mime_types_add(types, "html", "text/html");
1737                 yaz_mime_types_add(types, "htm", "text/html");
1738                 yaz_mime_types_add(types, "txt", "text/plain");
1739                 yaz_mime_types_add(types, "js", "application/x-javascript");
1740
1741                 yaz_mime_types_add(types, "gif", "image/gif");
1742                 yaz_mime_types_add(types, "png", "image/png");
1743                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1744                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1745
1746                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1747                 if (!ctype)
1748                 {
1749                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1750                     p = z_get_HTTP_Response(o, 404);
1751                 }
1752                 else
1753                 {
1754                     p = z_get_HTTP_Response(o, 200);
1755                     hres = p->u.HTTP_Response;
1756                     hres->content_buf = content_buf;
1757                     hres->content_len = content_size;
1758                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1759                 }
1760                 yaz_mime_types_destroy(types);
1761             }
1762         }
1763         r = 1;
1764     }
1765
1766     if (r == 2)
1767     {
1768         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1769         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1770     }
1771     if (r == 2)  /* not taken */
1772     {
1773         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1774                            &diagnostic, &num_diagnostic);
1775         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1776     }
1777     if (r == 0)  /* decode SRW/SRU OK .. */
1778     {
1779         int http_code = 200;
1780         if (sr->which == Z_SRW_searchRetrieve_request)
1781         {
1782             Z_SRW_PDU *res =
1783                 yaz_srw_get_pdu(assoc->encode, Z_SRW_searchRetrieve_response,
1784                                 sr->srw_version);
1785             stylesheet = sr->u.request->stylesheet;
1786             if (num_diagnostic)
1787             {
1788                 res->u.response->diagnostics = diagnostic;
1789                 res->u.response->num_diagnostics = num_diagnostic;
1790             }
1791             else
1792             {
1793                 srw_bend_search(assoc, req, sr, res, &http_code);
1794             }
1795             if (http_code == 200)
1796                 soap_package->u.generic->p = res;
1797         }
1798         else if (sr->which == Z_SRW_explain_request)
1799         {
1800             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_explain_response,
1801                                              sr->srw_version);
1802             stylesheet = sr->u.explain_request->stylesheet;
1803             if (num_diagnostic)
1804             {
1805                 res->u.explain_response->diagnostics = diagnostic;
1806                 res->u.explain_response->num_diagnostics = num_diagnostic;
1807             }
1808             srw_bend_explain(assoc, req, sr,
1809                              res->u.explain_response, &http_code);
1810             if (http_code == 200)
1811                 soap_package->u.generic->p = res;
1812         }
1813         else if (sr->which == Z_SRW_scan_request)
1814         {
1815             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_scan_response,
1816                                              sr->srw_version);
1817             stylesheet = sr->u.scan_request->stylesheet;
1818             if (num_diagnostic)
1819             {
1820                 res->u.scan_response->diagnostics = diagnostic;
1821                 res->u.scan_response->num_diagnostics = num_diagnostic;
1822             }
1823             srw_bend_scan(assoc, req, sr,
1824                           res->u.scan_response, &http_code);
1825             if (http_code == 200)
1826                 soap_package->u.generic->p = res;
1827         }
1828         else if (sr->which == Z_SRW_update_request)
1829         {
1830             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_update_response,
1831                                              sr->srw_version);
1832             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1833             if (num_diagnostic)
1834             {
1835                 res->u.update_response->diagnostics = diagnostic;
1836                 res->u.update_response->num_diagnostics = num_diagnostic;
1837             }
1838             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1839             srw_bend_update(assoc, req, sr,
1840                             res->u.update_response, &http_code);
1841             if (http_code == 200)
1842                 soap_package->u.generic->p = res;
1843         }
1844         else
1845         {
1846             yaz_log(log_request, "SOAP ERROR");
1847             /* FIXME - what error, what query */
1848             http_code = 500;
1849             z_soap_error(assoc->encode, soap_package,
1850                          "SOAP-ENV:Client", "Bad method", 0);
1851         }
1852         if (http_code == 200 || http_code == 500)
1853         {
1854             static Z_SOAP_Handler soap_handlers[4] = {
1855 #if YAZ_HAVE_XML2
1856                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1857                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1858                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1859 #endif
1860                 {0, 0, 0}
1861             };
1862             char ctype[80];
1863             int ret;
1864             p = z_get_HTTP_Response(o, 200);
1865             hres = p->u.HTTP_Response;
1866
1867             if (!stylesheet && assoc->server)
1868                 stylesheet = assoc->server->stylesheet;
1869
1870             /* empty stylesheet means NO stylesheet */
1871             if (stylesheet && *stylesheet == '\0')
1872                 stylesheet = 0;
1873
1874             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1875                                        &hres->content_buf, &hres->content_len,
1876                                        soap_handlers, charset, stylesheet);
1877             hres->code = http_code;
1878
1879             strcpy(ctype, "text/xml");
1880             if (charset && strlen(charset) < sizeof(ctype)-30)
1881             {
1882                 strcat(ctype, "; charset=");
1883                 strcat(ctype, charset);
1884             }
1885             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1886         }
1887         else
1888             p = z_get_HTTP_Response(o, http_code);
1889     }
1890
1891     if (p == 0)
1892         p = z_get_HTTP_Response(o, 500);
1893     hres = p->u.HTTP_Response;
1894     if (!strcmp(hreq->version, "1.0"))
1895     {
1896         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1897         if (v && !strcmp(v, "Keep-Alive"))
1898             keepalive = 1;
1899         else
1900             keepalive = 0;
1901         hres->version = "1.0";
1902     }
1903     else
1904     {
1905         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1906         if (v && !strcmp(v, "close"))
1907             keepalive = 0;
1908         else
1909             keepalive = 1;
1910         hres->version = "1.1";
1911     }
1912     if (!keepalive)
1913     {
1914         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1915         assoc->state = ASSOC_DEAD;
1916         assoc->cs_get_mask = 0;
1917     }
1918     else
1919     {
1920         int t;
1921         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1922
1923         if (alive && isdigit(*(const unsigned char *) alive))
1924             t = atoi(alive);
1925         else
1926             t = 15;
1927         if (t < 0 || t > 3600)
1928             t = 3600;
1929         iochan_settimeout(assoc->client_chan,t);
1930         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1931     }
1932     process_gdu_response(assoc, req, p);
1933 }
1934
1935 static void process_gdu_request(association *assoc, request *req)
1936 {
1937     if (req->gdu_request->which == Z_GDU_Z3950)
1938     {
1939         char *msg = 0;
1940         req->apdu_request = req->gdu_request->u.z3950;
1941         if (process_z_request(assoc, req, &msg) < 0)
1942             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1943     }
1944     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1945         process_http_request(assoc, req);
1946     else
1947     {
1948         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1949     }
1950 }
1951
1952 /*
1953  * Initiate request processing.
1954  */
1955 static int process_z_request(association *assoc, request *req, char **msg)
1956 {
1957     int fd = -1;
1958     Z_APDU *res;
1959     int retval;
1960
1961     *msg = "Unknown Error";
1962     assert(req && req->state == REQUEST_IDLE);
1963     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1964     {
1965         *msg = "Missing InitRequest";
1966         return -1;
1967     }
1968     switch (req->apdu_request->which)
1969     {
1970     case Z_APDU_initRequest:
1971         res = process_initRequest(assoc, req); break;
1972     case Z_APDU_searchRequest:
1973         res = process_searchRequest(assoc, req, &fd); break;
1974     case Z_APDU_presentRequest:
1975         res = process_presentRequest(assoc, req, &fd); break;
1976     case Z_APDU_scanRequest:
1977         if (assoc->init->bend_scan)
1978             res = process_scanRequest(assoc, req, &fd);
1979         else
1980         {
1981             *msg = "Cannot handle Scan APDU";
1982             return -1;
1983         }
1984         break;
1985     case Z_APDU_extendedServicesRequest:
1986         if (assoc->init->bend_esrequest)
1987             res = process_ESRequest(assoc, req, &fd);
1988         else
1989         {
1990             *msg = "Cannot handle Extended Services APDU";
1991             return -1;
1992         }
1993         break;
1994     case Z_APDU_sortRequest:
1995         if (assoc->init->bend_sort)
1996             res = process_sortRequest(assoc, req, &fd);
1997         else
1998         {
1999             *msg = "Cannot handle Sort APDU";
2000             return -1;
2001         }
2002         break;
2003     case Z_APDU_close:
2004         process_close(assoc, req);
2005         return 0;
2006     case Z_APDU_deleteResultSetRequest:
2007         if (assoc->init->bend_delete)
2008             res = process_deleteRequest(assoc, req, &fd);
2009         else
2010         {
2011             *msg = "Cannot handle Delete APDU";
2012             return -1;
2013         }
2014         break;
2015     case Z_APDU_segmentRequest:
2016         if (assoc->init->bend_segment)
2017         {
2018             res = process_segmentRequest(assoc, req);
2019         }
2020         else
2021         {
2022             *msg = "Cannot handle Segment APDU";
2023             return -1;
2024         }
2025         break;
2026     case Z_APDU_triggerResourceControlRequest:
2027         return 0;
2028     default:
2029         *msg = "Bad APDU received";
2030         return -1;
2031     }
2032     if (res)
2033     {
2034         yaz_log(YLOG_DEBUG, "  result immediately available");
2035         retval = process_z_response(assoc, req, res);
2036     }
2037     else if (fd < 0)
2038     {
2039         yaz_log(YLOG_DEBUG, "  result unavailble");
2040         retval = 0;
2041     }
2042     else /* no result yet - one will be provided later */
2043     {
2044         IOCHAN chan;
2045
2046         /* Set up an I/O handler for the fd supplied by the backend */
2047
2048         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2049         req->state = REQUEST_PENDING;
2050         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2051             abort();
2052         iochan_setdata(chan, assoc);
2053         retval = 0;
2054     }
2055     return retval;
2056 }
2057
2058 /*
2059  * Handle message from the backend.
2060  */
2061 void backend_response(IOCHAN i, int event)
2062 {
2063     association *assoc = (association *)iochan_getdata(i);
2064     request *req = request_head(&assoc->incoming);
2065     Z_APDU *res;
2066     int fd;
2067
2068     yaz_log(YLOG_DEBUG, "backend_response");
2069     assert(assoc && req && req->state != REQUEST_IDLE);
2070     /* determine what it is we're waiting for */
2071     switch (req->apdu_request->which)
2072     {
2073         case Z_APDU_searchRequest:
2074             res = response_searchRequest(assoc, req, 0, &fd); break;
2075 #if 0
2076         case Z_APDU_presentRequest:
2077             res = response_presentRequest(assoc, req, 0, &fd); break;
2078         case Z_APDU_scanRequest:
2079             res = response_scanRequest(assoc, req, 0, &fd); break;
2080 #endif
2081         default:
2082             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2083             abort();
2084     }
2085     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2086     {
2087         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2088         do_close(assoc, Z_Close_systemProblem, 0);
2089         iochan_destroy(i);
2090         return;
2091     }
2092     else if (!res) /* no result yet - try again later */
2093     {
2094         yaz_log(YLOG_DEBUG, "   no result yet");
2095         iochan_setfd(i, fd); /* in case fd has changed */
2096     }
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(*res));
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 * 60);
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 = *req->maximumRecordSize;
2350
2351     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2352         assoc->preferredMessageSize = *req->preferredMessageSize;
2353
2354     resp->preferredMessageSize = &assoc->preferredMessageSize;
2355     resp->maximumRecordSize = &assoc->maximumRecordSize;
2356
2357     resp->implementationId = odr_prepend(assoc->encode,
2358                 assoc->init->implementation_id,
2359                 resp->implementationId);
2360
2361     resp->implementationName = odr_prepend(assoc->encode,
2362                 assoc->init->implementation_name,
2363                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2364
2365     if (binitres->errcode)
2366     {
2367         assoc->state = ASSOC_DEAD;
2368         resp->userInformationField =
2369             init_diagnostics(assoc->encode, binitres->errcode,
2370                              binitres->errstring);
2371         *resp->result = 0;
2372     }
2373     else
2374         assoc->state = ASSOC_UP;
2375
2376     if (log_request)
2377     {
2378         if (!req->idAuthentication)
2379             yaz_log(log_request, "Auth none");
2380         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2381         {
2382             const char *open = req->idAuthentication->u.open;
2383             const char *slash = strchr(open, '/');
2384             int len;
2385             if (slash)
2386                 len = slash - open;
2387             else
2388                 len = strlen(open);
2389                 yaz_log(log_request, "Auth open %.*s", len, open);
2390         }
2391         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2392         {
2393             const char *user = req->idAuthentication->u.idPass->userId;
2394             const char *group = req->idAuthentication->u.idPass->groupId;
2395             yaz_log(log_request, "Auth idPass %s %s",
2396                     user ? user : "-", group ? group : "-");
2397         }
2398         else if (req->idAuthentication->which
2399                  == Z_IdAuthentication_anonymous)
2400         {
2401             yaz_log(log_request, "Auth anonymous");
2402         }
2403         else
2404         {
2405             yaz_log(log_request, "Auth other");
2406         }
2407     }
2408     if (log_request)
2409     {
2410         WRBUF wr = wrbuf_alloc();
2411         wrbuf_printf(wr, "Init ");
2412         if (binitres->errcode)
2413             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2414         else
2415             wrbuf_printf(wr, "OK -");
2416         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2417                      (req->implementationId ? req->implementationId :"-"),
2418                      (req->implementationName ?
2419                       req->implementationName : "-"),
2420                      (req->implementationVersion ?
2421                       req->implementationVersion : "-")
2422             );
2423         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2424         wrbuf_destroy(wr);
2425     }
2426     return apdu;
2427 }
2428
2429 /*
2430  * Set the specified `errcode' and `errstring' into a UserInfo-1
2431  * external to be returned to the client in accordance with Z35.90
2432  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2433  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2434  */
2435 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2436 {
2437     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2438         addinfo ? " -- " : "", addinfo ? addinfo : "");
2439     return zget_init_diagnostics(odr, error, addinfo);
2440 }
2441
2442 /*
2443  * nonsurrogate diagnostic record.
2444  */
2445 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2446 {
2447     Z_Records *rec = (Z_Records *) odr_malloc(assoc->encode, sizeof(*rec));
2448
2449     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2450             addinfo ? " -- " : "", addinfo ? addinfo : "");
2451
2452     rec->which = Z_Records_NSD;
2453     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2454                                                            error, addinfo);
2455     return rec;
2456 }
2457
2458 /*
2459  * surrogate diagnostic.
2460  */
2461 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2462                                           const char *dbname,
2463                                           int error, const char *addinfo)
2464 {
2465     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2466             addinfo ? " -- " : "", addinfo ? addinfo : "");
2467     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2468 }
2469
2470 static Z_Records *pack_records(association *a, char *setname, Odr_int start,
2471                                Odr_int *num, Z_RecordComposition *comp,
2472                                Odr_int *next, Odr_int *pres,
2473                                Z_ReferenceId *referenceId,
2474                                Odr_oid *oid, int *errcode)
2475 {
2476     int recno, total_length = 0, toget = *num, dumped_records = 0;
2477     Z_Records *records =
2478         (Z_Records *) odr_malloc(a->encode, sizeof(*records));
2479     Z_NamePlusRecordList *reclist =
2480         (Z_NamePlusRecordList *) odr_malloc(a->encode, sizeof(*reclist));
2481     Z_NamePlusRecord **list =
2482         (Z_NamePlusRecord **) odr_malloc(a->encode, sizeof(*list) * toget);
2483
2484     records->which = Z_Records_DBOSD;
2485     records->u.databaseOrSurDiagnostics = reclist;
2486     reclist->num_records = 0;
2487     reclist->records = list;
2488     *pres = Z_PresentStatus_success;
2489     *num = 0;
2490     *next = 0;
2491
2492     yaz_log(log_requestdetail, "Request to pack " ODR_INT_PRINTF "+%d %s", start, toget, setname);
2493     yaz_log(log_requestdetail, "pms=" ODR_INT_PRINTF
2494             ", mrs=" ODR_INT_PRINTF, a->preferredMessageSize,
2495         a->maximumRecordSize);
2496     for (recno = start; reclist->num_records < toget; recno++)
2497     {
2498         bend_fetch_rr freq;
2499         Z_NamePlusRecord *thisrec;
2500         int this_length = 0;
2501         /*
2502          * we get the number of bytes allocated on the stream before any
2503          * allocation done by the backend - this should give us a reasonable
2504          * idea of the total size of the data so far.
2505          */
2506         total_length = odr_total(a->encode) - dumped_records;
2507         freq.errcode = 0;
2508         freq.errstring = 0;
2509         freq.basename = 0;
2510         freq.len = 0;
2511         freq.record = 0;
2512         freq.last_in_set = 0;
2513         freq.setname = setname;
2514         freq.surrogate_flag = 0;
2515         freq.number = recno;
2516         freq.comp = comp;
2517         freq.request_format = oid;
2518         freq.output_format = 0;
2519         freq.stream = a->encode;
2520         freq.print = a->print;
2521         freq.referenceId = referenceId;
2522         freq.schema = 0;
2523
2524         retrieve_fetch(a, &freq);
2525
2526         *next = freq.last_in_set ? 0 : recno + 1;
2527
2528         if (freq.errcode)
2529         {
2530             if (!freq.surrogate_flag) /* non-surrogate diagnostic i.e. global */
2531             {
2532                 char s[20];
2533                 *pres = Z_PresentStatus_failure;
2534                 /* for 'present request out of range',
2535                    set addinfo to record position if not set */
2536                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2537                                 freq.errstring == 0)
2538                 {
2539                     sprintf (s, "%d", recno);
2540                     freq.errstring = s;
2541                 }
2542                 if (errcode)
2543                     *errcode = freq.errcode;
2544                 return diagrec(a, freq.errcode, freq.errstring);
2545             }
2546             reclist->records[reclist->num_records] =
2547                 surrogatediagrec(a, freq.basename, freq.errcode,
2548                                  freq.errstring);
2549             reclist->num_records++;
2550             continue;
2551         }
2552         if (freq.record == 0)  /* no error and no record ? */
2553         {
2554             *next = 0;   /* signal end-of-set and stop */
2555             break;
2556         }
2557         if (freq.len >= 0)
2558             this_length = freq.len;
2559         else
2560             this_length = odr_total(a->encode) - total_length - dumped_records;
2561         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2562             this_length, total_length, dumped_records);
2563         if (a->preferredMessageSize > 0 &&
2564                 this_length + total_length > a->preferredMessageSize)
2565         {
2566             /* record is small enough, really */
2567             if (this_length <= a->preferredMessageSize && recno > start)
2568             {
2569                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2570                 *pres = Z_PresentStatus_partial_2;
2571                 break;
2572             }
2573             /* record can only be fetched by itself */
2574             if (this_length < a->maximumRecordSize)
2575             {
2576                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2577                 if (toget > 1)
2578                 {
2579                     yaz_log(YLOG_DEBUG, "  Dropped it");
2580                     reclist->records[reclist->num_records] =
2581                          surrogatediagrec(a, freq.basename, 16, 0);
2582                     reclist->num_records++;
2583                     dumped_records += this_length;
2584                     continue;
2585                 }
2586             }
2587             else /* too big entirely */
2588             {
2589                 yaz_log(log_requestdetail, "Record > maxrcdsz "
2590                         "this=%d max=" ODR_INT_PRINTF,
2591                         this_length, a->maximumRecordSize);
2592                 reclist->records[reclist->num_records] =
2593                     surrogatediagrec(a, freq.basename, 17, 0);
2594                 reclist->num_records++;
2595                 dumped_records += this_length;
2596                 continue;
2597             }
2598         }
2599
2600         if (!(thisrec = (Z_NamePlusRecord *)
2601               odr_malloc(a->encode, sizeof(*thisrec))))
2602             return 0;
2603         thisrec->databaseName = odr_strdup_null(a->encode, freq.basename);
2604         thisrec->which = Z_NamePlusRecord_databaseRecord;
2605
2606         if (!freq.output_format)
2607             freq.output_format = freq.request_format;
2608         thisrec->u.databaseRecord = z_ext_record_oid(
2609             a->encode, freq.output_format, freq.record, freq.len);
2610         if (!thisrec->u.databaseRecord)
2611             return 0;
2612         reclist->records[reclist->num_records] = thisrec;
2613         reclist->num_records++;
2614     }
2615     *num = reclist->num_records;
2616     return records;
2617 }
2618
2619 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2620     int *fd)
2621 {
2622     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2623     bend_search_rr *bsrr =
2624         (bend_search_rr *)nmem_malloc(reqb->request_mem, sizeof(*bsrr));
2625
2626     yaz_log(log_requestdetail, "Got SearchRequest.");
2627     bsrr->fd = fd;
2628     bsrr->request = reqb;
2629     bsrr->association = assoc;
2630     bsrr->referenceId = req->referenceId;
2631     bsrr->srw_sortKeys = 0;
2632     bsrr->srw_setname = 0;
2633     bsrr->srw_setnameIdleTime = 0;
2634     bsrr->estimated_hit_count = 0;
2635     bsrr->partial_resultset = 0;
2636     bsrr->extra_args = 0;
2637     bsrr->extra_response_data = 0;
2638
2639     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2640     if (req->databaseNames)
2641     {
2642         int i;
2643         for (i = 0; i < req->num_databaseNames; i++)
2644             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2645     }
2646
2647     yaz_log_zquery_level(log_requestdetail,req->query);
2648
2649     if (assoc->init->bend_search)
2650     {
2651         bsrr->setname = req->resultSetName;
2652         bsrr->replace_set = *req->replaceIndicator;
2653         bsrr->num_bases = req->num_databaseNames;
2654         bsrr->basenames = req->databaseNames;
2655         bsrr->query = req->query;
2656         bsrr->stream = assoc->encode;
2657         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2658         bsrr->decode = assoc->decode;
2659         bsrr->print = assoc->print;
2660         bsrr->hits = 0;
2661         bsrr->errcode = 0;
2662         bsrr->errstring = NULL;
2663         bsrr->search_info = NULL;
2664
2665         if (assoc->server && assoc->server->cql_transform
2666             && req->query->which == Z_Query_type_104
2667             && req->query->u.type_104->which == Z_External_CQL)
2668         {
2669             /* have a CQL query and a CQL to PQF transform .. */
2670             int srw_errcode =
2671                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2672                         assoc->server->cql_transform, bsrr->query);
2673             if (srw_errcode)
2674                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2675         }
2676
2677         if (assoc->server && assoc->server->ccl_transform
2678             && req->query->which == Z_Query_type_2) /*CCL*/
2679         {
2680             /* have a CCL query and a CCL to PQF transform .. */
2681             int srw_errcode =
2682                 ccl2pqf(bsrr->stream, req->query->u.type_2,
2683                         assoc->server->ccl_transform, bsrr);
2684             if (srw_errcode)
2685                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2686         }
2687
2688         if (!bsrr->errcode)
2689             (assoc->init->bend_search)(assoc->backend, bsrr);
2690         if (!bsrr->request)  /* backend not ready with the search response */
2691             return 0;  /* should not be used any more */
2692     }
2693     else
2694     {
2695         /* FIXME - make a diagnostic for it */
2696         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2697     }
2698     return response_searchRequest(assoc, reqb, bsrr, fd);
2699 }
2700
2701 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2702
2703 /*
2704  * Prepare a searchresponse based on the backend results. We probably want
2705  * to look at making the fetching of records nonblocking as well, but
2706  * so far, we'll keep things simple.
2707  * If bsrt is null, that means we're called in response to a communications
2708  * event, and we'll have to get the response for ourselves.
2709  */
2710 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2711     bend_search_rr *bsrt, int *fd)
2712 {
2713     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2714     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2715     Z_SearchResponse *resp = (Z_SearchResponse *)
2716         odr_malloc(assoc->encode, sizeof(*resp));
2717     Odr_int *nulint = odr_intdup(assoc->encode, 0);
2718     Odr_int *next = odr_intdup(assoc->encode, 0);
2719     Odr_int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2720     int returnedrecs = 0;
2721
2722     apdu->which = Z_APDU_searchResponse;
2723     apdu->u.searchResponse = resp;
2724     resp->referenceId = req->referenceId;
2725     resp->additionalSearchInfo = 0;
2726     resp->otherInfo = 0;
2727     *fd = -1;
2728     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2729     {
2730         yaz_log(YLOG_FATAL, "Bad result from backend");
2731         return 0;
2732     }
2733     else if (bsrt->errcode)
2734     {
2735         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2736         resp->resultCount = nulint;
2737         resp->numberOfRecordsReturned = nulint;
2738         resp->nextResultSetPosition = nulint;
2739         resp->searchStatus = odr_booldup(assoc->encode, 0);
2740         resp->resultSetStatus = none;
2741         resp->presentStatus = 0;
2742     }
2743     else
2744     {
2745         bool_t *sr = odr_booldup(assoc->encode, 1);
2746         Odr_int *toget = odr_intdup(assoc->encode, 0);
2747         Z_RecordComposition comp, *compp = 0;
2748
2749         yaz_log(log_requestdetail, "resultCount: " ODR_INT_PRINTF, bsrt->hits);
2750
2751         resp->records = 0;
2752         resp->resultCount = &bsrt->hits;
2753
2754         comp.which = Z_RecordComp_simple;
2755         /* how many records does the user agent want, then? */
2756         if (bsrt->hits < 0)
2757             *toget = 0;
2758         else if (bsrt->hits <= *req->smallSetUpperBound)
2759         {
2760             *toget = bsrt->hits;
2761             if ((comp.u.simple = req->smallSetElementSetNames))
2762                 compp = &comp;
2763         }
2764         else if (bsrt->hits < *req->largeSetLowerBound)
2765         {
2766             *toget = *req->mediumSetPresentNumber;
2767             if (*toget > bsrt->hits)
2768                 *toget = bsrt->hits;
2769             if ((comp.u.simple = req->mediumSetElementSetNames))
2770                 compp = &comp;
2771         }
2772         else
2773             *toget = 0;
2774
2775         if (*toget && !resp->records)
2776         {
2777             Odr_int *presst = odr_intdup(assoc->encode, 0);
2778             /* Call bend_present if defined */
2779             if (assoc->init->bend_present)
2780             {
2781                 bend_present_rr *bprr = (bend_present_rr *)
2782                     nmem_malloc(reqb->request_mem, sizeof(*bprr));
2783                 bprr->setname = req->resultSetName;
2784                 bprr->start = 1;
2785                 bprr->number = *toget;
2786                 bprr->format = req->preferredRecordSyntax;
2787                 bprr->comp = compp;
2788                 bprr->referenceId = req->referenceId;
2789                 bprr->stream = assoc->encode;
2790                 bprr->print = assoc->print;
2791                 bprr->request = reqb;
2792                 bprr->association = assoc;
2793                 bprr->errcode = 0;
2794                 bprr->errstring = NULL;
2795                 (*assoc->init->bend_present)(assoc->backend, bprr);
2796
2797                 if (!bprr->request)
2798                     return 0;
2799                 if (bprr->errcode)
2800                 {
2801                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2802                     *resp->presentStatus = Z_PresentStatus_failure;
2803                 }
2804             }
2805
2806             if (!resp->records)
2807                 resp->records = pack_records(
2808                     assoc, req->resultSetName, 1,
2809                     toget, compp, next, presst, req->referenceId,
2810                     req->preferredRecordSyntax, NULL);
2811             if (!resp->records)
2812                 return 0;
2813             resp->numberOfRecordsReturned = toget;
2814             returnedrecs = *toget;
2815             resp->presentStatus = presst;
2816         }
2817         else
2818         {
2819             if (*resp->resultCount)
2820                 *next = 1;
2821             resp->numberOfRecordsReturned = nulint;
2822             resp->presentStatus = 0;
2823         }
2824         resp->nextResultSetPosition = next;
2825         resp->searchStatus = sr;
2826         resp->resultSetStatus = 0;
2827         if (bsrt->estimated_hit_count)
2828         {
2829             resp->resultSetStatus = odr_intdup(assoc->encode,
2830                                                Z_SearchResponse_estimate);
2831         }
2832         else if (bsrt->partial_resultset)
2833         {
2834             resp->resultSetStatus = odr_intdup(assoc->encode,
2835                                                Z_SearchResponse_subset);
2836         }
2837     }
2838     resp->additionalSearchInfo = bsrt->search_info;
2839
2840     if (log_request)
2841     {
2842         int i;
2843         WRBUF wr = wrbuf_alloc();
2844
2845         for (i = 0 ; i < req->num_databaseNames; i++){
2846             if (i)
2847                 wrbuf_printf(wr, "+");
2848             wrbuf_puts(wr, req->databaseNames[i]);
2849         }
2850         wrbuf_printf(wr, " ");
2851
2852         if (bsrt->errcode)
2853             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2854         else
2855             wrbuf_printf(wr, "OK " ODR_INT_PRINTF, bsrt->hits);
2856         wrbuf_printf(wr, " %s 1+%d ",
2857                      req->resultSetName, returnedrecs);
2858         yaz_query_to_wrbuf(wr, req->query);
2859
2860         yaz_log(log_request, "Search %s", wrbuf_cstr(wr));
2861         wrbuf_destroy(wr);
2862     }
2863     return apdu;
2864 }
2865
2866 /*
2867  * Maybe we got a little over-friendly when we designed bend_fetch to
2868  * get only one record at a time. Some backends can optimise multiple-record
2869  * fetches, and at any rate, there is some overhead involved in
2870  * all that selecting and hopping around. Problem is, of course, that the
2871  * frontend can't know ahead of time how many records it'll need to
2872  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2873  * is downright lousy as a bulk data transfer protocol.
2874  *
2875  * To start with, we'll do the fetching of records from the backend
2876  * in one operation: To save some trips in and out of the event-handler,
2877  * and to simplify the interface to pack_records. At any rate, asynch
2878  * operation is more fun in operations that have an unpredictable execution
2879  * speed - which is normally more true for search than for present.
2880  */
2881 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2882                                       int *fd)
2883 {
2884     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2885     Z_APDU *apdu;
2886     Z_PresentResponse *resp;
2887     Odr_int *next;
2888     Odr_int *num;
2889     int errcode = 0;
2890     const char *errstring = 0;
2891
2892     yaz_log(log_requestdetail, "Got PresentRequest.");
2893
2894     resp = (Z_PresentResponse *)odr_malloc(assoc->encode, sizeof(*resp));
2895     resp->records = 0;
2896     resp->presentStatus = odr_intdup(assoc->encode, 0);
2897     if (assoc->init->bend_present)
2898     {
2899         bend_present_rr *bprr = (bend_present_rr *)
2900             nmem_malloc(reqb->request_mem, sizeof(*bprr));
2901         bprr->setname = req->resultSetId;
2902         bprr->start = *req->resultSetStartPoint;
2903         bprr->number = *req->numberOfRecordsRequested;
2904         bprr->format = req->preferredRecordSyntax;
2905         bprr->comp = req->recordComposition;
2906         bprr->referenceId = req->referenceId;
2907         bprr->stream = assoc->encode;
2908         bprr->print = assoc->print;
2909         bprr->request = reqb;
2910         bprr->association = assoc;
2911         bprr->errcode = 0;
2912         bprr->errstring = NULL;
2913         (*assoc->init->bend_present)(assoc->backend, bprr);
2914
2915         if (!bprr->request)
2916             return 0; /* should not happen */
2917         if (bprr->errcode)
2918         {
2919             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2920             *resp->presentStatus = Z_PresentStatus_failure;
2921             errcode = bprr->errcode;
2922             errstring = bprr->errstring;
2923         }
2924     }
2925     apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2926     next = odr_intdup(assoc->encode, 0);
2927     num = odr_intdup(assoc->encode, 0);
2928
2929     apdu->which = Z_APDU_presentResponse;
2930     apdu->u.presentResponse = resp;
2931     resp->referenceId = req->referenceId;
2932     resp->otherInfo = 0;
2933
2934     if (!resp->records)
2935     {
2936         *num = *req->numberOfRecordsRequested;
2937         resp->records =
2938             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2939                          num, req->recordComposition, next,
2940                          resp->presentStatus,
2941                          req->referenceId, req->preferredRecordSyntax,
2942                          &errcode);
2943     }
2944     if (log_request)
2945     {
2946         WRBUF wr = wrbuf_alloc();
2947         wrbuf_printf(wr, "Present ");
2948
2949         if (*resp->presentStatus == Z_PresentStatus_failure)
2950             wrbuf_printf(wr, "ERROR %d ", errcode);
2951         else if (*resp->presentStatus == Z_PresentStatus_success)
2952             wrbuf_printf(wr, "OK -  ");
2953         else
2954             wrbuf_printf(wr, "Partial " ODR_INT_PRINTF " - ",
2955                          *resp->presentStatus);
2956
2957         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
2958                 req->resultSetId, *req->resultSetStartPoint,
2959                 *req->numberOfRecordsRequested);
2960         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
2961         wrbuf_destroy(wr);
2962     }
2963     if (!resp->records)
2964         return 0;
2965     resp->numberOfRecordsReturned = num;
2966     resp->nextResultSetPosition = next;
2967
2968     return apdu;
2969 }
2970
2971 /*
2972  * Scan was implemented rather in a hurry, and with support for only the basic
2973  * elements of the service in the backend API. Suggestions are welcome.
2974  */
2975 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2976 {
2977     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2978     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2979     Z_ScanResponse *res = (Z_ScanResponse *)
2980         odr_malloc(assoc->encode, sizeof(*res));
2981     Odr_int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2982     Odr_int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2983     Z_ListEntries *ents = (Z_ListEntries *)
2984         odr_malloc(assoc->encode, sizeof(*ents));
2985     Z_DiagRecs *diagrecs_p = NULL;
2986     bend_scan_rr *bsrr = (bend_scan_rr *)
2987         odr_malloc(assoc->encode, sizeof(*bsrr));
2988     struct scan_entry *save_entries;
2989
2990     yaz_log(log_requestdetail, "Got ScanRequest");
2991
2992     apdu->which = Z_APDU_scanResponse;
2993     apdu->u.scanResponse = res;
2994     res->referenceId = req->referenceId;
2995
2996     /* if step is absent, set it to 0 */
2997     res->stepSize = odr_intdup(assoc->encode, 0);
2998     if (req->stepSize)
2999         *res->stepSize = *req->stepSize;
3000
3001     res->scanStatus = scanStatus;
3002     res->numberOfEntriesReturned = numberOfEntriesReturned;
3003     res->positionOfTerm = 0;
3004     res->entries = ents;
3005     ents->num_entries = 0;
3006     ents->entries = NULL;
3007     ents->num_nonsurrogateDiagnostics = 0;
3008     ents->nonsurrogateDiagnostics = NULL;
3009     res->attributeSet = 0;
3010     res->otherInfo = 0;
3011
3012     if (req->databaseNames)
3013     {
3014         int i;
3015         for (i = 0; i < req->num_databaseNames; i++)
3016             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
3017     }
3018     bsrr->scanClause = 0;
3019     bsrr->errcode = 0;
3020     bsrr->errstring = 0;
3021     bsrr->num_bases = req->num_databaseNames;
3022     bsrr->basenames = req->databaseNames;
3023     bsrr->num_entries = *req->numberOfTermsRequested;
3024     bsrr->term = req->termListAndStartPoint;
3025     bsrr->referenceId = req->referenceId;
3026     bsrr->stream = assoc->encode;
3027     bsrr->print = assoc->print;
3028     bsrr->step_size = res->stepSize;
3029     bsrr->setname = yaz_oi_get_string_oid(&req->otherInfo,
3030                                           yaz_oid_userinfo_scan_set, 1, 0);
3031     bsrr->entries = 0;
3032     /* For YAZ 2.0 and earlier it was the backend handler that
3033        initialized entries (member display_term did not exist)
3034        YAZ 2.0 and later sets 'entries'  and initialize all members
3035        including 'display_term'. If YAZ 2.0 or later sees that
3036        entries was modified - we assume that it is an old handler and
3037        that 'display_term' is _not_ set.
3038     */
3039     if (bsrr->num_entries > 0)
3040     {
3041         int i;
3042         bsrr->entries = (struct scan_entry *)
3043             odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3044                        bsrr->num_entries);
3045         for (i = 0; i<bsrr->num_entries; i++)
3046         {
3047             bsrr->entries[i].term = 0;
3048             bsrr->entries[i].occurrences = 0;
3049             bsrr->entries[i].errcode = 0;
3050             bsrr->entries[i].errstring = 0;
3051             bsrr->entries[i].display_term = 0;
3052         }
3053     }
3054     save_entries = bsrr->entries;  /* save it so we can compare later */
3055
3056     bsrr->attributeset = req->attributeSet;
3057     log_scan_term_level(log_requestdetail, req->termListAndStartPoint,
3058                         bsrr->attributeset);
3059     bsrr->term_position = req->preferredPositionInResponse ?
3060         *req->preferredPositionInResponse : 1;
3061
3062     ((int (*)(void *, bend_scan_rr *))
3063      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3064
3065     if (bsrr->errcode)
3066         diagrecs_p = zget_DiagRecs(assoc->encode,
3067                                    bsrr->errcode, bsrr->errstring);
3068     else
3069     {
3070         int i;
3071         Z_Entry **tab = (Z_Entry **)
3072             odr_malloc(assoc->encode, sizeof(*tab) * bsrr->num_entries);
3073
3074         if (bsrr->status == BEND_SCAN_PARTIAL)
3075             *scanStatus = Z_Scan_partial_5;
3076         else
3077             *scanStatus = Z_Scan_success;
3078         ents->entries = tab;
3079         ents->num_entries = bsrr->num_entries;
3080         res->numberOfEntriesReturned = odr_intdup(assoc->encode,
3081                                                    ents->num_entries);
3082         res->positionOfTerm = &bsrr->term_position;
3083         for (i = 0; i < bsrr->num_entries; i++)
3084         {
3085             Z_Entry *e;
3086             Z_TermInfo *t;
3087             Odr_oct *o;
3088
3089             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3090             if (bsrr->entries[i].occurrences >= 0)
3091             {
3092                 e->which = Z_Entry_termInfo;
3093                 e->u.termInfo = t = (Z_TermInfo *)
3094                     odr_malloc(assoc->encode, sizeof(*t));
3095                 t->suggestedAttributes = 0;
3096                 t->displayTerm = 0;
3097                 if (save_entries == bsrr->entries &&
3098                     bsrr->entries[i].display_term)
3099                 {
3100                     /* the entries was _not_ set by the handler. So it's
3101                        safe to test for new member display_term. It is
3102                        NULL'ed by us.
3103                     */
3104                     t->displayTerm = odr_strdup(assoc->encode,
3105                                                 bsrr->entries[i].display_term);
3106                 }
3107                 t->alternativeTerm = 0;
3108                 t->byAttributes = 0;
3109                 t->otherTermInfo = 0;
3110                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3111                 t->term = (Z_Term *)
3112                     odr_malloc(assoc->encode, sizeof(*t->term));
3113                 t->term->which = Z_Term_general;
3114                 t->term->u.general = o =
3115                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3116                 o->buf = (unsigned char *)
3117                     odr_malloc(assoc->encode, o->len = o->size =
3118                                strlen(bsrr->entries[i].term));
3119                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3120                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (" ODR_INT_PRINTF ")", i,
3121                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3122             }
3123             else
3124             {
3125                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3126                                                   bsrr->entries[i].errcode,
3127                                                   bsrr->entries[i].errstring);
3128                 assert(drecs->num_diagRecs == 1);
3129                 e->which = Z_Entry_surrogateDiagnostic;
3130                 assert(drecs->diagRecs[0]);
3131                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3132             }
3133         }
3134     }
3135     if (diagrecs_p)
3136     {
3137         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3138         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3139     }
3140     if (log_request)
3141     {
3142         int i;
3143         WRBUF wr = wrbuf_alloc();
3144         wrbuf_printf(wr, "Scan ");
3145         for (i = 0 ; i < req->num_databaseNames; i++)
3146         {
3147             if (i)
3148                 wrbuf_printf(wr, "+");
3149             wrbuf_puts(wr, req->databaseNames[i]);
3150         }
3151
3152         wrbuf_printf(wr, " ");
3153
3154         if (bsrr->errcode)
3155             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3156         else
3157             wrbuf_printf(wr, "OK");
3158
3159         wrbuf_printf(wr, " " ODR_INT_PRINTF " - " ODR_INT_PRINTF "+"
3160                      ODR_INT_PRINTF "+" ODR_INT_PRINTF,
3161                      res->numberOfEntriesReturned ?
3162                      *res->numberOfEntriesReturned : 0,
3163                      (req->preferredPositionInResponse ?
3164                       *req->preferredPositionInResponse : 1),
3165                      *req->numberOfTermsRequested,
3166                      (res->stepSize ? *res->stepSize : 1));
3167
3168         if (bsrr->setname)
3169             wrbuf_printf(wr, "+%s", bsrr->setname);
3170
3171         wrbuf_printf(wr, " ");
3172         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3173                           bsrr->attributeset);
3174         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3175         wrbuf_destroy(wr);
3176     }
3177     return apdu;
3178 }
3179
3180 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3181     int *fd)
3182 {
3183     int i;
3184     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3185     Z_SortResponse *res = (Z_SortResponse *)
3186         odr_malloc(assoc->encode, sizeof(*res));
3187     bend_sort_rr *bsrr = (bend_sort_rr *)
3188         odr_malloc(assoc->encode, sizeof(*bsrr));
3189
3190     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3191
3192     yaz_log(log_requestdetail, "Got SortRequest.");
3193
3194     bsrr->num_input_setnames = req->num_inputResultSetNames;
3195     for (i=0;i<req->num_inputResultSetNames;i++)
3196         yaz_log(log_requestdetail, "Input resultset: '%s'",
3197                 req->inputResultSetNames[i]);
3198     bsrr->input_setnames = req->inputResultSetNames;
3199     bsrr->referenceId = req->referenceId;
3200     bsrr->output_setname = req->sortedResultSetName;
3201     yaz_log(log_requestdetail, "Output resultset: '%s'",
3202                 req->sortedResultSetName);
3203     bsrr->sort_sequence = req->sortSequence;
3204        /*FIXME - dump those sequences too */
3205     bsrr->stream = assoc->encode;
3206     bsrr->print = assoc->print;
3207
3208     bsrr->sort_status = Z_SortResponse_failure;
3209     bsrr->errcode = 0;
3210     bsrr->errstring = 0;
3211
3212     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3213
3214     res->referenceId = bsrr->referenceId;
3215     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3216     res->resultSetStatus = 0;
3217     if (bsrr->errcode)
3218     {
3219         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3220                                        bsrr->errcode, bsrr->errstring);
3221         res->diagnostics = dr->diagRecs;
3222         res->num_diagnostics = dr->num_diagRecs;
3223     }
3224     else
3225     {
3226         res->num_diagnostics = 0;
3227         res->diagnostics = 0;
3228     }
3229     res->resultCount = 0;
3230     res->otherInfo = 0;
3231
3232     apdu->which = Z_APDU_sortResponse;
3233     apdu->u.sortResponse = res;
3234     if (log_request)
3235     {
3236         WRBUF wr = wrbuf_alloc();
3237         wrbuf_printf(wr, "Sort ");
3238         if (bsrr->errcode)
3239             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3240         else
3241             wrbuf_printf(wr,  "OK -");
3242         wrbuf_printf(wr, " (");
3243         for (i = 0; i<req->num_inputResultSetNames; i++)
3244         {
3245             if (i)
3246                 wrbuf_printf(wr, "+");
3247             wrbuf_puts(wr, req->inputResultSetNames[i]);
3248         }
3249         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3250
3251         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3252         wrbuf_destroy(wr);
3253     }
3254     return apdu;
3255 }
3256
3257 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3258     int *fd)
3259 {
3260     int i;
3261     Z_DeleteResultSetRequest *req =
3262         reqb->apdu_request->u.deleteResultSetRequest;
3263     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3264         odr_malloc(assoc->encode, sizeof(*res));
3265     bend_delete_rr *bdrr = (bend_delete_rr *)
3266         odr_malloc(assoc->encode, sizeof(*bdrr));
3267     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3268
3269     yaz_log(log_requestdetail, "Got DeleteRequest.");
3270
3271     bdrr->num_setnames = req->num_resultSetList;
3272     bdrr->setnames = req->resultSetList;
3273     for (i = 0; i<req->num_resultSetList; i++)
3274         yaz_log(log_requestdetail, "resultset: '%s'",
3275                 req->resultSetList[i]);
3276     bdrr->stream = assoc->encode;
3277     bdrr->print = assoc->print;
3278     bdrr->function = *req->deleteFunction;
3279     bdrr->referenceId = req->referenceId;
3280     bdrr->statuses = 0;
3281     if (bdrr->num_setnames > 0)
3282     {
3283         bdrr->statuses = (Odr_int*)
3284             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3285                        bdrr->num_setnames);
3286         for (i = 0; i < bdrr->num_setnames; i++)
3287             bdrr->statuses[i] = 0;
3288     }
3289     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3290
3291     res->referenceId = req->referenceId;
3292
3293     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3294
3295     res->deleteListStatuses = 0;
3296     if (bdrr->num_setnames > 0)
3297     {
3298         int i;
3299         res->deleteListStatuses = (Z_ListStatuses *)
3300             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3301         res->deleteListStatuses->num = bdrr->num_setnames;
3302         res->deleteListStatuses->elements =
3303             (Z_ListStatus **)
3304             odr_malloc(assoc->encode,
3305                         sizeof(*res->deleteListStatuses->elements) *
3306                         bdrr->num_setnames);
3307         for (i = 0; i<bdrr->num_setnames; i++)
3308         {
3309             res->deleteListStatuses->elements[i] =
3310                 (Z_ListStatus *)
3311                 odr_malloc(assoc->encode,
3312                             sizeof(**res->deleteListStatuses->elements));
3313             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3314             res->deleteListStatuses->elements[i]->id =
3315                 odr_strdup(assoc->encode, bdrr->setnames[i]);
3316         }
3317     }
3318     res->numberNotDeleted = 0;
3319     res->bulkStatuses = 0;
3320     res->deleteMessage = 0;
3321     res->otherInfo = 0;
3322
3323     apdu->which = Z_APDU_deleteResultSetResponse;
3324     apdu->u.deleteResultSetResponse = res;
3325     if (log_request)
3326     {
3327         WRBUF wr = wrbuf_alloc();
3328         wrbuf_printf(wr, "Delete ");
3329         if (bdrr->delete_status)
3330             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3331         else
3332             wrbuf_printf(wr, "OK -");
3333         for (i = 0; i<req->num_resultSetList; i++)
3334             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3335         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3336         wrbuf_destroy(wr);
3337     }
3338     return apdu;
3339 }
3340
3341 static void process_close(association *assoc, request *reqb)
3342 {
3343     Z_Close *req = reqb->apdu_request->u.close;
3344     static char *reasons[] =
3345     {
3346         "finished",
3347         "shutdown",
3348         "systemProblem",
3349         "costLimit",
3350         "resources",
3351         "securityViolation",
3352         "protocolError",
3353         "lackOfActivity",
3354         "peerAbort",
3355         "unspecified"
3356     };
3357
3358     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3359         reasons[*req->closeReason], req->diagnosticInformation ?
3360         req->diagnosticInformation : "NULL");
3361     if (assoc->version < 3) /* to make do_force respond with close */
3362         assoc->version = 3;
3363     do_close_req(assoc, Z_Close_finished,
3364                  "Association terminated by client", reqb);
3365     yaz_log(log_request,"Close OK");
3366 }
3367
3368 static Z_APDU *process_segmentRequest(association *assoc, request *reqb)
3369 {
3370     bend_segment_rr req;
3371
3372     req.segment = reqb->apdu_request->u.segmentRequest;
3373     req.stream = assoc->encode;
3374     req.decode = assoc->decode;
3375     req.print = assoc->print;
3376     req.association = assoc;
3377
3378     (*assoc->init->bend_segment)(assoc->backend, &req);
3379
3380     return 0;
3381 }
3382
3383 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3384 {
3385     bend_esrequest_rr esrequest;
3386     const char *ext_name = "unknown";
3387
3388     Z_ExtendedServicesRequest *req =
3389         reqb->apdu_request->u.extendedServicesRequest;
3390     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3391
3392     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3393
3394     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3395     esrequest.stream = assoc->encode;
3396     esrequest.decode = assoc->decode;
3397     esrequest.print = assoc->print;
3398     esrequest.errcode = 0;
3399     esrequest.errstring = NULL;
3400     esrequest.request = reqb;
3401     esrequest.association = assoc;
3402     esrequest.taskPackage = 0;
3403     esrequest.referenceId = req->referenceId;
3404
3405
3406     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3407     {
3408         switch(esrequest.esr->taskSpecificParameters->which)
3409         {
3410         case Z_External_itemOrder:
3411             ext_name = "ItemOrder"; break;
3412         case Z_External_update:
3413             ext_name = "Update"; break;
3414         case Z_External_update0:
3415             ext_name = "Update0"; break;
3416         case Z_External_ESAdmin:
3417             ext_name = "Admin"; break;
3418
3419         }
3420     }
3421
3422     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3423
3424     /* If the response is being delayed, return NULL */
3425     if (esrequest.request == NULL)
3426         return(NULL);
3427
3428     resp->referenceId = req->referenceId;
3429
3430     if (esrequest.errcode == -1)
3431     {
3432         /* Backend service indicates request will be processed */
3433         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3434         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3435     }
3436     else if (esrequest.errcode == 0)
3437     {
3438         /* Backend service indicates request will be processed */
3439         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3440         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3441     }
3442     else
3443     {
3444         Z_DiagRecs *diagRecs =
3445             zget_DiagRecs(assoc->encode, esrequest.errcode,
3446                           esrequest.errstring);
3447         /* Backend indicates error, request will not be processed */
3448         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3449         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3450         resp->num_diagnostics = diagRecs->num_diagRecs;
3451         resp->diagnostics = diagRecs->diagRecs;
3452         if (log_request)
3453         {
3454             WRBUF wr = wrbuf_alloc();
3455             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3456             yaz_log(log_request, "EsRequest %s", wrbuf_cstr(wr) );
3457             wrbuf_destroy(wr);
3458         }
3459
3460     }
3461     /* Do something with the members of bend_extendedservice */
3462     if (esrequest.taskPackage)
3463     {
3464         resp->taskPackage = z_ext_record_oid(
3465             assoc->encode, yaz_oid_recsyn_extended,
3466             (const char *)  esrequest.taskPackage, -1);
3467     }
3468     yaz_log(YLOG_DEBUG,"Send the result apdu");
3469     return apdu;
3470 }
3471
3472 int bend_assoc_is_alive(bend_association assoc)
3473 {
3474     if (assoc->state == ASSOC_DEAD)
3475         return 0; /* already marked as dead. Don't check I/O chan anymore */
3476
3477     return iochan_is_alive(assoc->client_chan);
3478 }
3479
3480
3481 /*
3482  * Local variables:
3483  * c-basic-offset: 4
3484  * c-file-style: "Stroustrup"
3485  * indent-tabs-mode: nil
3486  * End:
3487  * vim: shiftwidth=4 tabstop=8 expandtab
3488  */
3489