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 void save_referenceId(request *reqb, Z_ReferenceId *refid);
  97 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
  98     int *fd);
  99 static Z_APDU *process_segmentRequest(association *assoc, request *reqb);
 100
 101 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
 102
 103 /* dynamic logging levels */
 104 static int logbits_set = 0;
 105 static int log_session = 0; /* one-line logs for session */
 106 static int log_sessiondetail = 0; /* more detailed stuff */
 107 static int log_request = 0; /* one-line logs for requests */
 108 static int log_requestdetail = 0;  /* more detailed stuff */
 109
 110 /** get_logbits sets global loglevel bits */
 111 static void get_logbits(void)
 112 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 113     if (!logbits_set)
 114     {
 115         logbits_set = 1;
 116         log_session = yaz_log_module_level("session");
 117         log_sessiondetail = yaz_log_module_level("sessiondetail");
 118         log_request = yaz_log_module_level("request");
 119         log_requestdetail = yaz_log_module_level("requestdetail");
 120     }
 121 }
 122
 123
 124
 125 static void wr_diag(WRBUF w, int error, const char *addinfo)
 126 {
 127     wrbuf_printf(w, "ERROR %d+", error);
 128     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
 129     if (addinfo){
 130         wrbuf_puts(w, "+");
 131         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
 132     }
 133
 134     wrbuf_puts(w, " ");
 135 }
 136
 137
 138 /*
 139  * Create and initialize a new association-handle.
 140  *  channel  : iochannel for the current line.
 141  *  link     : communications channel.
 142  * Returns: 0 or a new association handle.
 143  */
 144 association *create_association(IOCHAN channel, COMSTACK link,
 145                                 const char *apdufile)
 146 {
 147     association *anew;
 148
 149     if (!logbits_set)
 150         get_logbits();
 151     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 152         return 0;
 153     anew->init = 0;
 154     anew->version = 0;
 155     anew->last_control = 0;
 156     anew->client_chan = channel;
 157     anew->client_link = link;
 158     anew->cs_get_mask = 0;
 159     anew->cs_put_mask = 0;
 160     anew->cs_accept_mask = 0;
 161     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 162         !(anew->encode = odr_createmem(ODR_ENCODE)))
 163         return 0;
 164     if (apdufile && *apdufile)
 165     {
 166         FILE *f;
 167
 168         if (!(anew->print = odr_createmem(ODR_PRINT)))
 169             return 0;
 170         if (*apdufile == '@')
 171         {
 172             odr_setprint(anew->print, yaz_log_file());
 173         }
 174         else if (*apdufile != '-')
 175         {
 176             char filename[256];
 177             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 178             if (!(f = fopen(filename, "w")))
 179             {
 180                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 181                 return 0;
 182             }
 183             setvbuf(f, 0, _IONBF, 0);
 184             odr_setprint(anew->print, f);
 185         }
 186     }
 187     else
 188         anew->print = 0;
 189     anew->input_buffer = 0;
 190     anew->input_buffer_len = 0;
 191     anew->backend = 0;
 192     anew->state = ASSOC_NEW;
 193     request_initq(&anew->incoming);
 194     request_initq(&anew->outgoing);
 195     anew->proto = cs_getproto(link);
 196     anew->server = 0;
 197     return anew;
 198 }
 199
 200 /*
 201  * Free association and release resources.
 202  */
 203 void destroy_association(association *h)
 204 {
 205     statserv_options_block *cb = statserv_getcontrol();
 206     request *req;
 207
 208     xfree(h->init);
 209     odr_destroy(h->decode);
 210     odr_destroy(h->encode);
 211     if (h->print)
 212         odr_destroy(h->print);
 213     if (h->input_buffer)
 214     xfree(h->input_buffer);
 215     if (h->backend)
 216         (*cb->bend_close)(h->backend);
 217     while ((req = request_deq(&h->incoming)))
 218         request_release(req);
 219     while ((req = request_deq(&h->outgoing)))
 220         request_release(req);
 221     request_delq(&h->incoming);
 222     request_delq(&h->outgoing);
 223     xfree(h);
 224     xmalloc_trav("session closed");
 225     if (cb && cb->one_shot)
 226     {
 227         exit(0);
 228     }
 229 }
 230
 231 static void do_close_req(association *a, int reason, char *message,
 232                          request *req)
 233 {
 234     Z_APDU apdu;
 235     Z_Close *cls = zget_Close(a->encode);
 236
 237     /* Purge request queue */
 238     while (request_deq(&a->incoming));
 239     while (request_deq(&a->outgoing));
 240     if (a->version >= 3)
 241     {
 242         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 243             reason, message ? message : "none");
 244         apdu.which = Z_APDU_close;
 245         apdu.u.close = cls;
 246         *cls->closeReason = reason;
 247         cls->diagnosticInformation = message;
 248         process_z_response(a, req, &apdu);
 249         iochan_settimeout(a->client_chan, 20);
 250     }
 251     else
 252     {
 253         request_release(req);
 254         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 255         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 256         a->cs_put_mask = 0;
 257     }
 258     a->state = ASSOC_DEAD;
 259 }
 260
 261 static void do_close(association *a, int reason, char *message)
 262 {
 263     request *req = request_get(&a->outgoing);
 264     do_close_req (a, reason, message, req);
 265 }
 266
 267
 268 int ir_read(IOCHAN h, int event)
 269 {
 270     association *assoc = (association *)iochan_getdata(h);
 271     COMSTACK conn = assoc->client_link;
 272     request *req;
 273
 274     if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 275     {
 276         yaz_log(YLOG_DEBUG, "ir_session (input)");
 277         /* We aren't speaking to this fellow */
 278         if (assoc->state == ASSOC_DEAD)
 279         {
 280             yaz_log(log_sessiondetail, "Connection closed - end of session");
 281             cs_close(conn);
 282             destroy_association(assoc);
 283             iochan_destroy(h);
 284             return 0;
 285         }
 286         assoc->cs_get_mask = EVENT_INPUT;
 287
 288         do
 289         {
 290             int res = cs_get(conn, &assoc->input_buffer,
 291                              &assoc->input_buffer_len);
 292             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 293             {
 294                 yaz_log(log_session, "Connection error: %s res=%d",
 295                         cs_errmsg(cs_errno(conn)), res);
 296                 req = request_get(&assoc->incoming); /* get a new request */
 297                 do_close_req(assoc, Z_Close_protocolError,
 298                              "Incoming package too large", req);
 299                 return 0;
 300             }
 301             else if (res <= 0)
 302             {
 303                 yaz_log(log_session, "Connection closed by client");
 304                 assoc->state = ASSOC_DEAD;
 305                 return 0;
 306             }
 307             else if (res == 1) /* incomplete read - wait for more  */
 308             {
 309                 if (conn->io_pending & CS_WANT_WRITE)
 310                     assoc->cs_get_mask |= EVENT_OUTPUT;
 311                 iochan_setflag(h, assoc->cs_get_mask);
 312                 return 0;
 313             }
 314             /* we got a complete PDU. Let's decode it */
 315             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 316                     assoc->input_buffer[0] & 0xff,
 317                     assoc->input_buffer[1] & 0xff,
 318                     assoc->input_buffer[2] & 0xff);
 319             req = request_get(&assoc->incoming); /* get a new request */
 320             odr_reset(assoc->decode);
 321             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 322             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 323             {
 324                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 325                         "[near byte %ld] ",
 326                         odr_errmsg(odr_geterror(assoc->decode)),
 327                         odr_getelement(assoc->decode),
 328                         (long) odr_offset(assoc->decode));
 329                 if (assoc->decode->error != OHTTP)
 330                 {
 331                     yaz_log(YLOG_WARN, "PDU dump:");
 332                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 333                     request_release(req);
 334                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 335                 }
 336                 else
 337                 {
 338                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 339                     assoc->state = ASSOC_DEAD;
 340                     process_gdu_response(assoc, req, p);
 341                 }
 342                 return 0;
 343             }
 344             req->request_mem = odr_extract_mem(assoc->decode);
 345             if (assoc->print)
 346             {
 347                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 348                     yaz_log(YLOG_WARN, "ODR print error: %s",
 349                             odr_errmsg(odr_geterror(assoc->print)));
 350                 odr_reset(assoc->print);
 351             }
 352             request_enq(&assoc->incoming, req);
 353         }
 354         while (cs_more(conn));
 355     }
 356     return 1;
 357 }
 358
 359 /*
 360  * This is where PDUs from the client are read and the further
 361  * processing is initiated. Flow of control moves down through the
 362  * various process_* functions below, until the encoded result comes back up
 363  * to the output handler in here.
 364  *
 365  *  h     : the I/O channel that has an outstanding event.
 366  *  event : the current outstanding event.
 367  */
 368 void ir_session(IOCHAN h, int event)
 369 {
 370     int res;
 371     association *assoc = (association *)iochan_getdata(h);
 372     COMSTACK conn = assoc->client_link;
 373     request *req;
 374
 375     assert(h && conn && assoc);
 376     if (event == EVENT_TIMEOUT)
 377     {
 378         if (assoc->state != ASSOC_UP)
 379         {
 380             yaz_log(log_session, "Timeout. Closing connection");
 381             /* do we need to lod this at all */
 382             cs_close(conn);
 383             destroy_association(assoc);
 384             iochan_destroy(h);
 385         }
 386         else
 387         {
 388             yaz_log(log_sessiondetail, "Timeout. Sending Z39.50 Close");
 389             do_close(assoc, Z_Close_lackOfActivity, 0);
 390         }
 391         return;
 392     }
 393     if (event & assoc->cs_accept_mask)
 394     {
 395         if (!cs_accept(conn))
 396         {
 397             yaz_log(YLOG_WARN, "accept failed");
 398             destroy_association(assoc);
 399             iochan_destroy(h);
 400             return;
 401         }
 402         iochan_clearflag(h, EVENT_OUTPUT);
 403         if (conn->io_pending)
 404         {   /* cs_accept didn't complete */
 405             assoc->cs_accept_mask =
 406                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 407                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 408
 409             iochan_setflag(h, assoc->cs_accept_mask);
 410         }
 411         else
 412         {   /* cs_accept completed. Prepare for reading (cs_get) */
 413             assoc->cs_accept_mask = 0;
 414             assoc->cs_get_mask = EVENT_INPUT;
 415             iochan_setflag(h, assoc->cs_get_mask);
 416         }
 417         return;
 418     }
 419     if (event & assoc->cs_get_mask) /* input */
 420     {
 421         if (!ir_read(h, event))
 422             return;
 423         req = request_head(&assoc->incoming);
 424         if (req->state == REQUEST_IDLE)
 425         {
 426             request_deq(&assoc->incoming);
 427             process_gdu_request(assoc, req);
 428         }
 429     }
 430     if (event & assoc->cs_put_mask)
 431     {
 432         request *req = request_head(&assoc->outgoing);
 433
 434         assoc->cs_put_mask = 0;
 435         yaz_log(YLOG_DEBUG, "ir_session (output)");
 436         req->state = REQUEST_PENDING;
 437         switch (res = cs_put(conn, req->response, req->len_response))
 438         {
 439         case -1:
 440             yaz_log(log_sessiondetail, "Connection closed by client");
 441             cs_close(conn);
 442             destroy_association(assoc);
 443             iochan_destroy(h);
 444             break;
 445         case 0: /* all sent - release the request structure */
 446             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 447 #if 0
 448             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 449                     req->response);
 450 #endif
 451             nmem_destroy(req->request_mem);
 452             request_deq(&assoc->outgoing);
 453             request_release(req);
 454             if (!request_head(&assoc->outgoing))
 455             {   /* restore mask for cs_get operation ... */
 456                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 457                 iochan_setflag(h, assoc->cs_get_mask);
 458                 if (assoc->state == ASSOC_DEAD)
 459                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 460             }
 461             else
 462             {
 463                 assoc->cs_put_mask = EVENT_OUTPUT;
 464             }
 465             break;
 466         default:
 467             if (conn->io_pending & CS_WANT_WRITE)
 468                 assoc->cs_put_mask |= EVENT_OUTPUT;
 469             if (conn->io_pending & CS_WANT_READ)
 470                 assoc->cs_put_mask |= EVENT_INPUT;
 471             iochan_setflag(h, assoc->cs_put_mask);
 472         }
 473     }
 474     if (event & EVENT_EXCEPT)
 475     {
 476         yaz_log(YLOG_WARN, "ir_session (exception)");
 477         cs_close(conn);
 478         destroy_association(assoc);
 479         iochan_destroy(h);
 480     }
 481 }
 482
 483 static int process_z_request(association *assoc, request *req, char **msg);
 484
 485
 486 static void assoc_init_reset(association *assoc)
 487 {
 488     xfree (assoc->init);
 489     assoc->init = (bend_initrequest *) xmalloc(sizeof(*assoc->init));
 490
 491     assoc->init->stream = assoc->encode;
 492     assoc->init->print = assoc->print;
 493     assoc->init->auth = 0;
 494     assoc->init->referenceId = 0;
 495     assoc->init->implementation_version = 0;
 496     assoc->init->implementation_id = 0;
 497     assoc->init->implementation_name = 0;
 498     assoc->init->query_charset = 0;
 499     assoc->init->records_in_same_charset = 0;
 500     assoc->init->bend_sort = NULL;
 501     assoc->init->bend_search = NULL;
 502     assoc->init->bend_present = NULL;
 503     assoc->init->bend_esrequest = NULL;
 504     assoc->init->bend_delete = NULL;
 505     assoc->init->bend_scan = NULL;
 506     assoc->init->bend_segment = NULL;
 507     assoc->init->bend_fetch = NULL;
 508     assoc->init->bend_explain = NULL;
 509     assoc->init->bend_srw_scan = NULL;
 510     assoc->init->bend_srw_update = NULL;
 511     assoc->init->named_result_sets = 0;
 512
 513     assoc->init->charneg_request = NULL;
 514     assoc->init->charneg_response = NULL;
 515
 516     assoc->init->decode = assoc->decode;
 517     assoc->init->peer_name =
 518         odr_strdup(assoc->encode, cs_addrstr(assoc->client_link));
 519
 520     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 521 }
 522
 523 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 524 {
 525     statserv_options_block *cb = statserv_getcontrol();
 526     if (!assoc->init)
 527     {
 528         const char *encoding = "UTF-8";
 529         Z_External *ce;
 530         bend_initresult *binitres;
 531
 532         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 533         assoc_init_reset(assoc);
 534
 535         if (sr->username)
 536         {
 537             Z_IdAuthentication *auth = (Z_IdAuthentication *)
 538                 odr_malloc(assoc->decode, sizeof(*auth));
 539             int len;
 540
 541             len = strlen(sr->username) + 1;
 542             if (sr->password)
 543                 len += strlen(sr->password) + 2;
 544             auth->which = Z_IdAuthentication_open;
 545             auth->u.open = (char *) odr_malloc(assoc->decode, len);
 546             strcpy(auth->u.open, sr->username);
 547             if (sr->password && *sr->password)
 548             {
 549                 strcat(auth->u.open, "/");
 550                 strcat(auth->u.open, sr->password);
 551             }
 552             assoc->init->auth = auth;
 553         }
 554
 555 #if 1
 556         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 557         assoc->init->charneg_request = ce->u.charNeg3;
 558 #endif
 559         assoc->backend = 0;
 560         if (!(binitres = (*cb->bend_init)(assoc->init)))
 561         {
 562             assoc->state = ASSOC_DEAD;
 563             yaz_add_srw_diagnostic(assoc->encode, d, num,
 564                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 565             return 0;
 566         }
 567         assoc->backend = binitres->handle;
 568         assoc->init->auth = 0;
 569         if (binitres->errcode)
 570         {
 571             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 572             assoc->state = ASSOC_DEAD;
 573             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 574                                    binitres->errstring);
 575             return 0;
 576         }
 577         return 1;
 578     }
 579     return 1;
 580 }
 581
 582 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 583 {
 584 #if YAZ_HAVE_XML2
 585     yaz_record_conv_t rc = 0;
 586     const char *match_schema = 0;
 587     Odr_oid *match_syntax = 0;
 588
 589     if (assoc->server)
 590     {
 591         int r;
 592         const char *input_schema = yaz_get_esn(rr->comp);
 593         Odr_oid *input_syntax_raw = rr->request_format;
 594
 595         const char *backend_schema = 0;
 596         Odr_oid *backend_syntax = 0;
 597
 598         r = yaz_retrieval_request(assoc->server->retrieval,
 599                                   input_schema,
 600                                   input_syntax_raw,
 601                                   &match_schema,
 602                                   &match_syntax,
 603                                   &rc,
 604                                   &backend_schema,
 605                                   &backend_syntax);
 606         if (r == -1) /* error ? */
 607         {
 608             const char *details = yaz_retrieval_get_error(
 609                 assoc->server->retrieval);
 610
 611             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 612             if (details)
 613                 rr->errstring = odr_strdup(rr->stream, details);
 614             return -1;
 615         }
 616         else if (r == 1 || r == 3)
 617         {
 618             const char *details = input_schema;
 619             rr->errcode =
 620                 YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
 621             if (details)
 622                 rr->errstring = odr_strdup(rr->stream, details);
 623             return -1;
 624         }
 625         else if (r == 2)
 626         {
 627             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 628             if (input_syntax_raw)
 629             {
 630                 char oidbuf[OID_STR_MAX];
 631                 oid_oid_to_dotstring(input_syntax_raw, oidbuf);
 632                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 633             }
 634             return -1;
 635         }
 636         if (backend_schema)
 637         {
 638             yaz_set_esn(&rr->comp, backend_schema, odr_getmem(rr->stream));
 639         }
 640         if (backend_syntax)
 641             rr->request_format = backend_syntax;
 642     }
 643     (*assoc->init->bend_fetch)(assoc->backend, rr);
 644     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
 645     {   /* post conversion must take place .. */
 646         WRBUF output_record = wrbuf_alloc();
 647         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 648         if (r)
 649         {
 650             const char *details = yaz_record_conv_get_error(rc);
 651             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 652             if (details)
 653                 rr->errstring = odr_strdup(rr->stream, details);
 654         }
 655         else
 656         {
 657             rr->len = wrbuf_len(output_record);
 658             rr->record = (char *) odr_malloc(rr->stream, rr->len);
 659             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 660         }
 661         wrbuf_destroy(output_record);
 662     }
 663     if (match_syntax)
 664         rr->output_format = match_syntax;
 665     if (match_schema)
 666         rr->schema = odr_strdup(rr->stream, match_schema);
 667 #else
 668     (*assoc->init->bend_fetch)(assoc->backend, rr);
 669 #endif
 670     return 0;
 671 }
 672
 673 static int srw_bend_fetch(association *assoc, int pos,
 674                           Z_SRW_searchRetrieveRequest *srw_req,
 675                           Z_SRW_record *record,
 676                           const char **addinfo)
 677 {
 678     bend_fetch_rr rr;
 679     ODR o = assoc->encode;
 680
 681     rr.setname = "default";
 682     rr.number = pos;
 683     rr.referenceId = 0;
 684     rr.request_format = odr_oiddup(assoc->decode, yaz_oid_recsyn_xml);
 685
 686     rr.comp = (Z_RecordComposition *)
 687             odr_malloc(assoc->decode, sizeof(*rr.comp));
 688     rr.comp->which = Z_RecordComp_complex;
 689     rr.comp->u.complex = (Z_CompSpec *)
 690             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 691     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 692         odr_malloc(assoc->encode, sizeof(bool_t));
 693     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 694     rr.comp->u.complex->num_dbSpecific = 0;
 695     rr.comp->u.complex->dbSpecific = 0;
 696     rr.comp->u.complex->num_recordSyntax = 0;
 697     rr.comp->u.complex->recordSyntax = 0;
 698
 699     rr.comp->u.complex->generic = (Z_Specification *)
 700             odr_malloc(assoc->decode, sizeof(Z_Specification));
 701
 702     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 703     rr.comp->u.complex->generic->which = Z_Schema_uri;
 704     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 705
 706     /* ESN = recordSchema if recordSchema is present */
 707     rr.comp->u.complex->generic->elementSpec = 0;
 708     if (srw_req->recordSchema)
 709     {
 710         rr.comp->u.complex->generic->elementSpec =
 711             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 712         rr.comp->u.complex->generic->elementSpec->which =
 713             Z_ElementSpec_elementSetName;
 714         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 715             srw_req->recordSchema;
 716     }
 717
 718     rr.stream = assoc->encode;
 719     rr.print = assoc->print;
 720
 721     rr.basename = 0;
 722     rr.len = 0;
 723     rr.record = 0;
 724     rr.last_in_set = 0;
 725     rr.errcode = 0;
 726     rr.errstring = 0;
 727     rr.surrogate_flag = 0;
 728     rr.schema = srw_req->recordSchema;
 729
 730     if (!assoc->init->bend_fetch)
 731         return 1;
 732
 733     retrieve_fetch(assoc, &rr);
 734
 735     if (rr.errcode && rr.surrogate_flag)
 736     {
 737         int code = yaz_diag_bib1_to_srw(rr.errcode);
 738         yaz_mk_sru_surrogate(o, record, pos, code, rr.errstring);
 739         return 0;
 740     }
 741     else if (rr.len >= 0)
 742     {
 743         record->recordData_buf = rr.record;
 744         record->recordData_len = rr.len;
 745         record->recordPosition = odr_intdup(o, pos);
 746         record->recordSchema = odr_strdup_null(
 747             o, rr.schema ? rr.schema : srw_req->recordSchema);
 748     }
 749     if (rr.errcode)
 750     {
 751         *addinfo = rr.errstring;
 752         return rr.errcode;
 753     }
 754     return 0;
 755 }
 756
 757 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 758                    Z_Query *query_result)
 759 {
 760     /* have a CQL query and  CQL to PQF transform .. */
 761     CQL_parser cp = cql_parser_create();
 762     int r;
 763     int srw_errcode = 0;
 764     const char *add = 0;
 765     char rpn_buf[5120];
 766
 767     r = cql_parser_string(cp, cql);
 768     if (r)
 769     {
 770         srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 771     }
 772     if (!r)
 773     {
 774         /* Syntax OK */
 775         r = cql_transform_buf(ct,
 776                               cql_parser_result(cp),
 777                               rpn_buf, sizeof(rpn_buf)-1);
 778         if (r)
 779             srw_errcode = cql_transform_error(ct, &add);
 780     }
 781     if (!r)
 782     {
 783         /* Syntax & transform OK. */
 784         /* Convert PQF string to Z39.50 to RPN query struct */
 785         YAZ_PQF_Parser pp = yaz_pqf_create();
 786         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 787         if (!rpnquery)
 788         {
 789             size_t off;
 790             const char *pqf_msg;
 791             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 792             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 793                     pqf_msg, code);
 794             srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 795         }
 796         else
 797         {
 798             query_result->which = Z_Query_type_1;
 799             query_result->u.type_1 = rpnquery;
 800         }
 801         yaz_pqf_destroy(pp);
 802     }
 803     cql_parser_destroy(cp);
 804     return srw_errcode;
 805 }
 806
 807 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 808                         Z_AttributesPlusTerm *result)
 809 {
 810     Z_Query query;
 811     Z_RPNQuery *rpn;
 812     int srw_error = cql2pqf(odr, cql, ct, &query);
 813     if (srw_error)
 814         return srw_error;
 815     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 816         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* bad query type */
 817     rpn = query.u.type_1;
 818     if (!rpn->RPNStructure)
 819         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be structure */
 820     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 821         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be simple */
 822     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 823         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be be attributes + term */
 824     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 825            sizeof(*result));
 826     return 0;
 827 }
 828
 829
 830 static int ccl2pqf(ODR odr, const Odr_oct *ccl, CCL_bibset bibset,
 831                    bend_search_rr *bsrr) {
 832     char *ccl0;
 833     struct ccl_rpn_node *node;
 834     int errcode, pos;
 835
 836     ccl0 = odr_strdupn(odr, (char*) ccl->buf, ccl->len);
 837     if ((node = ccl_find_str(bibset, ccl0, &errcode, &pos)) == 0) {
 838         bsrr->errstring = (char*) ccl_err_msg(errcode);
 839         return YAZ_SRW_QUERY_SYNTAX_ERROR;    /* Query syntax error */
 840     }
 841
 842     bsrr->query->which = Z_Query_type_1;
 843     bsrr->query->u.type_1 = ccl_rpn_query(odr, node);
 844     return 0;
 845 }
 846
 847
 848 static void srw_bend_search(association *assoc, request *req,
 849                             Z_SRW_PDU *sr,
 850                             Z_SRW_PDU *res,
 851                             int *http_code)
 852 {
 853     Z_SRW_searchRetrieveResponse *srw_res = res->u.response;
 854     int srw_error = 0;
 855     Z_External *ext;
 856     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 857
 858     *http_code = 200;
 859     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 860     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 861     if (srw_res->num_diagnostics == 0 && assoc->init)
 862     {
 863         bend_search_rr rr;
 864         rr.setname = "default";
 865         rr.replace_set = 1;
 866         rr.num_bases = 1;
 867         rr.basenames = &srw_req->database;
 868         rr.referenceId = 0;
 869         rr.srw_sortKeys = 0;
 870         rr.srw_setname = 0;
 871         rr.srw_setnameIdleTime = 0;
 872         rr.estimated_hit_count = 0;
 873         rr.partial_resultset = 0;
 874         rr.query = (Z_Query *) odr_malloc(assoc->decode, sizeof(*rr.query));
 875         rr.query->u.type_1 = 0;
 876         rr.extra_args = sr->extra_args;
 877         rr.extra_response_data = 0;
 878
 879         if (srw_req->query_type == Z_SRW_query_type_cql)
 880         {
 881             if (assoc->server && assoc->server->cql_transform)
 882             {
 883                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 884                                           assoc->server->cql_transform,
 885                                           rr.query);
 886                 if (srw_errcode)
 887                 {
 888                     yaz_add_srw_diagnostic(assoc->encode,
 889                                            &srw_res->diagnostics,
 890                                            &srw_res->num_diagnostics,
 891                                            srw_errcode, 0);
 892                 }
 893             }
 894             else
 895             {
 896                 /* CQL query to backend. Wrap it - Z39.50 style */
 897                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 898                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 899                                                         "1.2.840.10003.16.2");
 900                 ext->indirect_reference = 0;
 901                 ext->descriptor = 0;
 902                 ext->which = Z_External_CQL;
 903                 ext->u.cql = srw_req->query.cql;
 904
 905                 rr.query->which = Z_Query_type_104;
 906                 rr.query->u.type_104 =  ext;
 907             }
 908         }
 909         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 910         {
 911             Z_RPNQuery *RPNquery;
 912             YAZ_PQF_Parser pqf_parser;
 913
 914             pqf_parser = yaz_pqf_create();
 915
 916             RPNquery = yaz_pqf_parse(pqf_parser, assoc->decode,
 917                                      srw_req->query.pqf);
 918             if (!RPNquery)
 919             {
 920                 const char *pqf_msg;
 921                 size_t off;
 922                 int code = yaz_pqf_error(pqf_parser, &pqf_msg, &off);
 923                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 924                         code, pqf_msg, (long) off);
 925                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 926             }
 927
 928             rr.query->which = Z_Query_type_1;
 929             rr.query->u.type_1 =  RPNquery;
 930
 931             yaz_pqf_destroy(pqf_parser);
 932         }
 933         else
 934         {
 935             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 936                                    &srw_res->num_diagnostics,
 937                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 938         }
 939         if (rr.query->u.type_1)
 940         {
 941             rr.stream = assoc->encode;
 942             rr.decode = assoc->decode;
 943             rr.print = assoc->print;
 944             rr.request = req;
 945             if ( srw_req->sort.sortKeys )
 946                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 947                                              srw_req->sort.sortKeys );
 948             rr.association = assoc;
 949             rr.fd = 0;
 950             rr.hits = 0;
 951             rr.errcode = 0;
 952             rr.errstring = 0;
 953             rr.search_info = 0;
 954             yaz_log_zquery_level(log_requestdetail,rr.query);
 955
 956             (assoc->init->bend_search)(assoc->backend, &rr);
 957             if (rr.errcode)
 958             {
 959                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 960                 {
 961                     *http_code = 404;
 962                 }
 963                 else
 964                 {
 965                     srw_error = yaz_diag_bib1_to_srw(rr.errcode);
 966                     yaz_add_srw_diagnostic(assoc->encode,
 967                                            &srw_res->diagnostics,
 968                                            &srw_res->num_diagnostics,
 969                                            srw_error, rr.errstring);
 970                 }
 971             }
 972             else
 973             {
 974                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
 975                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
 976
 977                 yaz_log(log_requestdetail, "Request to pack %d+%d out of "
 978                         ODR_INT_PRINTF,
 979                         start, number, rr.hits);
 980
 981                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 982                 if (rr.srw_setname)
 983                 {
 984                     srw_res->resultSetId =
 985                         odr_strdup(assoc->encode, rr.srw_setname );
 986                     srw_res->resultSetIdleTime =
 987                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
 988                 }
 989
 990                 if (start > rr.hits || start < 1)
 991                 {
 992                     /* if hits<=0 and start=1 we don't return a diagnostic */
 993                     if (start != 1)
 994                         yaz_add_srw_diagnostic(
 995                             assoc->encode,
 996                             &srw_res->diagnostics, &srw_res->num_diagnostics,
 997                             YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
 998                 }
 999                 else if (number > 0)
1000                 {
1001                     int i;
1002                     int ok = 1;
1003                     if (start + number > rr.hits)
1004                         number = rr.hits - start + 1;
1005
1006                     /* Call bend_present if defined */
1007                     if (assoc->init->bend_present)
1008                     {
1009                         bend_present_rr *bprr = (bend_present_rr*)
1010                             odr_malloc(assoc->decode, sizeof(*bprr));
1011                         bprr->setname = "default";
1012                         bprr->start = start;
1013                         bprr->number = number;
1014                         if (srw_req->recordSchema)
1015                         {
1016                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1017                                                                             sizeof(*bprr->comp));
1018                             bprr->comp->which = Z_RecordComp_simple;
1019                             bprr->comp->u.simple = (Z_ElementSetNames *)
1020                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1021                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1022                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1023                         }
1024                         else
1025                         {
1026                             bprr->comp = 0;
1027                         }
1028                         bprr->stream = assoc->encode;
1029                         bprr->referenceId = 0;
1030                         bprr->print = assoc->print;
1031                         bprr->request = req;
1032                         bprr->association = assoc;
1033                         bprr->errcode = 0;
1034                         bprr->errstring = NULL;
1035                         (*assoc->init->bend_present)(assoc->backend, bprr);
1036
1037                         if (!bprr->request)
1038                             return;
1039                         if (bprr->errcode)
1040                         {
1041                             srw_error = yaz_diag_bib1_to_srw(bprr->errcode);
1042                             yaz_add_srw_diagnostic(assoc->encode,
1043                                                    &srw_res->diagnostics,
1044                                                    &srw_res->num_diagnostics,
1045                                                    srw_error, bprr->errstring);
1046                             ok = 0;
1047                         }
1048                     }
1049
1050                     if (ok)
1051                     {
1052                         int j = 0;
1053                         int packing = Z_SRW_recordPacking_string;
1054                         if (srw_req->recordPacking)
1055                         {
1056                             packing =
1057                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1058                             if (packing == -1)
1059                                 packing = Z_SRW_recordPacking_string;
1060                         }
1061                         srw_res->records = (Z_SRW_record *)
1062                             odr_malloc(assoc->encode,
1063                                        number * sizeof(*srw_res->records));
1064
1065                         srw_res->extra_records = (Z_SRW_extra_record **)
1066                             odr_malloc(assoc->encode,
1067                                        number*sizeof(*srw_res->extra_records));
1068
1069                         for (i = 0; i<number; i++)
1070                         {
1071                             int errcode;
1072                             const char *addinfo = 0;
1073
1074                             srw_res->records[j].recordPacking = packing;
1075                             srw_res->records[j].recordData_buf = 0;
1076                             srw_res->extra_records[j] = 0;
1077                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1078                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1079                                                      srw_res->records + j,
1080                                                      &addinfo);
1081                             if (errcode)
1082                             {
1083                                 yaz_add_srw_diagnostic(assoc->encode,
1084                                                        &srw_res->diagnostics,
1085                                                        &srw_res->num_diagnostics,
1086                                                        yaz_diag_bib1_to_srw(errcode),
1087                                                        addinfo);
1088
1089                                 break;
1090                             }
1091                             if (srw_res->records[j].recordData_buf)
1092                                 j++;
1093                         }
1094                         srw_res->num_records = j;
1095                         if (!j)
1096                             srw_res->records = 0;
1097                     }
1098                 }
1099                 if (rr.extra_response_data)
1100                 {
1101                     res->extraResponseData_buf = rr.extra_response_data;
1102                     res->extraResponseData_len = strlen(rr.extra_response_data);
1103                 }
1104                 if (rr.estimated_hit_count || rr.partial_resultset)
1105                 {
1106                     yaz_add_srw_diagnostic(
1107                         assoc->encode,
1108                         &srw_res->diagnostics,
1109                         &srw_res->num_diagnostics,
1110                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1111                         0);
1112                 }
1113             }
1114         }
1115     }
1116     if (log_request)
1117     {
1118         const char *querystr = "?";
1119         const char *querytype = "?";
1120         WRBUF wr = wrbuf_alloc();
1121
1122         switch (srw_req->query_type)
1123         {
1124         case Z_SRW_query_type_cql:
1125             querytype = "CQL";
1126             querystr = srw_req->query.cql;
1127             break;
1128         case Z_SRW_query_type_pqf:
1129             querytype = "PQF";
1130             querystr = srw_req->query.pqf;
1131             break;
1132         }
1133         wrbuf_printf(wr, "SRWSearch %s ", srw_req->database);
1134         if (srw_res->num_diagnostics)
1135             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1136         else if (*http_code != 200)
1137             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1138         else if (srw_res->numberOfRecords)
1139         {
1140             wrbuf_printf(wr, "OK " ODR_INT_PRINTF,
1141                          (srw_res->numberOfRecords ?
1142                           *srw_res->numberOfRecords : 0));
1143         }
1144         wrbuf_printf(wr, " %s " ODR_INT_PRINTF " +%d",
1145                      (srw_res->resultSetId ?
1146                       srw_res->resultSetId : "-"),
1147                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1148                      srw_res->num_records);
1149         yaz_log(log_request, "%s %s: %s", wrbuf_cstr(wr), querytype, querystr);
1150         wrbuf_destroy(wr);
1151     }
1152 }
1153
1154 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1155 {
1156 #if YAZ_HAVE_XML2
1157     xmlNodePtr ptr = (xmlNode *) rr->server_node_ptr;
1158     if (!ptr)
1159         return 0;
1160     for (ptr = ptr->children; ptr; ptr = ptr->next)
1161     {
1162         if (ptr->type != XML_ELEMENT_NODE)
1163             continue;
1164         if (!strcmp((const char *) ptr->name, "explain"))
1165         {
1166             int len;
1167             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1168             xmlChar *buf_out;
1169             char *content;
1170
1171             ptr = xmlCopyNode(ptr, 1);
1172
1173             xmlDocSetRootElement(doc, ptr);
1174
1175             xmlDocDumpMemory(doc, &buf_out, &len);
1176             content = (char*) odr_malloc(rr->stream, 1+len);
1177             memcpy(content, buf_out, len);
1178             content[len] = '\0';
1179
1180             xmlFree(buf_out);
1181             xmlFreeDoc(doc);
1182             rr->explain_buf = content;
1183             return 0;
1184         }
1185     }
1186 #endif
1187     return 0;
1188 }
1189
1190 static void srw_bend_explain(association *assoc, request *req,
1191                              Z_SRW_PDU *sr,
1192                              Z_SRW_explainResponse *srw_res,
1193                              int *http_code)
1194 {
1195     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1196     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1197     *http_code = 404;
1198     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1199     if (assoc->init)
1200     {
1201         bend_explain_rr rr;
1202
1203         rr.stream = assoc->encode;
1204         rr.decode = assoc->decode;
1205         rr.print = assoc->print;
1206         rr.explain_buf = 0;
1207         rr.database = srw_req->database;
1208         if (assoc->server)
1209             rr.server_node_ptr = assoc->server->server_node_ptr;
1210         else
1211             rr.server_node_ptr = 0;
1212         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1213         if (assoc->init->bend_explain)
1214             (*assoc->init->bend_explain)(assoc->backend, &rr);
1215         else
1216             srw_bend_explain_default(assoc->backend, &rr);
1217
1218         if (rr.explain_buf)
1219         {
1220             int packing = Z_SRW_recordPacking_string;
1221             if (srw_req->recordPacking)
1222             {
1223                 packing =
1224                     yaz_srw_str_to_pack(srw_req->recordPacking);
1225                 if (packing == -1)
1226                     packing = Z_SRW_recordPacking_string;
1227             }
1228             srw_res->record.recordSchema = rr.schema;
1229             srw_res->record.recordPacking = packing;
1230             srw_res->record.recordData_buf = rr.explain_buf;
1231             srw_res->record.recordData_len = strlen(rr.explain_buf);
1232             srw_res->record.recordPosition = 0;
1233             *http_code = 200;
1234         }
1235     }
1236 }
1237
1238 static void srw_bend_scan(association *assoc, request *req,
1239                           Z_SRW_PDU *sr,
1240                           Z_SRW_scanResponse *srw_res,
1241                           int *http_code)
1242 {
1243     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1244     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1245
1246     *http_code = 200;
1247     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1248     if (srw_res->num_diagnostics == 0 && assoc->init)
1249     {
1250         struct scan_entry *save_entries;
1251
1252         bend_scan_rr *bsrr = (bend_scan_rr *)
1253             odr_malloc(assoc->encode, sizeof(*bsrr));
1254         bsrr->num_bases = 1;
1255         bsrr->basenames = &srw_req->database;
1256
1257         bsrr->num_entries = srw_req->maximumTerms ?
1258             *srw_req->maximumTerms : 10;
1259         bsrr->term_position = srw_req->responsePosition ?
1260             *srw_req->responsePosition : 1;
1261
1262         bsrr->errcode = 0;
1263         bsrr->errstring = 0;
1264         bsrr->referenceId = 0;
1265         bsrr->stream = assoc->encode;
1266         bsrr->print = assoc->print;
1267         bsrr->step_size = odr_intdup(assoc->decode, 0);
1268         bsrr->entries = 0;
1269         bsrr->setname = 0;
1270
1271         if (bsrr->num_entries > 0)
1272         {
1273             int i;
1274             bsrr->entries = (struct scan_entry *)
1275                 odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1276                            bsrr->num_entries);
1277             for (i = 0; i<bsrr->num_entries; i++)
1278             {
1279                 bsrr->entries[i].term = 0;
1280                 bsrr->entries[i].occurrences = 0;
1281                 bsrr->entries[i].errcode = 0;
1282                 bsrr->entries[i].errstring = 0;
1283                 bsrr->entries[i].display_term = 0;
1284             }
1285         }
1286         save_entries = bsrr->entries;  /* save it so we can compare later */
1287
1288         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1289             assoc->init->bend_scan)
1290         {
1291             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1292
1293             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1294                                       &bsrr->attributeset,
1295                                       srw_req->scanClause.pqf);
1296             yaz_pqf_destroy(pqf_parser);
1297             bsrr->scanClause = 0;
1298             ((int (*)(void *, bend_scan_rr *))
1299              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1300         }
1301         else if (srw_req->query_type == Z_SRW_query_type_cql
1302                  && assoc->init->bend_scan && assoc->server
1303                  && assoc->server->cql_transform)
1304         {
1305             int srw_error;
1306             bsrr->scanClause = 0;
1307             bsrr->attributeset = 0;
1308             bsrr->term = (Z_AttributesPlusTerm *)
1309                 odr_malloc(assoc->decode, sizeof(*bsrr->term));
1310             srw_error = cql2pqf_scan(assoc->encode,
1311                                      srw_req->scanClause.cql,
1312                                      assoc->server->cql_transform,
1313                                      bsrr->term);
1314             if (srw_error)
1315                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1316                                        &srw_res->num_diagnostics,
1317                                        srw_error, 0);
1318             else
1319             {
1320                 ((int (*)(void *, bend_scan_rr *))
1321                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1322             }
1323         }
1324         else if (srw_req->query_type == Z_SRW_query_type_cql
1325                  && assoc->init->bend_srw_scan)
1326         {
1327             bsrr->term = 0;
1328             bsrr->attributeset = 0;
1329             bsrr->scanClause = srw_req->scanClause.cql;
1330             ((int (*)(void *, bend_scan_rr *))
1331              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1332         }
1333         else
1334         {
1335             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1336                                    &srw_res->num_diagnostics,
1337                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1338         }
1339         if (bsrr->errcode)
1340         {
1341             int srw_error;
1342             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1343             {
1344                 *http_code = 404;
1345                 return;
1346             }
1347             srw_error = yaz_diag_bib1_to_srw(bsrr->errcode);
1348
1349             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1350                                    &srw_res->num_diagnostics,
1351                                    srw_error, bsrr->errstring);
1352         }
1353         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1354         {
1355             int i;
1356             srw_res->terms = (Z_SRW_scanTerm*)
1357                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1358                            bsrr->num_entries);
1359
1360             srw_res->num_terms =  bsrr->num_entries;
1361             for (i = 0; i<bsrr->num_entries; i++)
1362             {
1363                 Z_SRW_scanTerm *t = srw_res->terms + i;
1364                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1365                 t->numberOfRecords =
1366                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1367                 t->displayTerm = 0;
1368                 if (save_entries == bsrr->entries &&
1369                     bsrr->entries[i].display_term)
1370                 {
1371                     /* the entries was _not_ set by the handler. So it's
1372                        safe to test for new member display_term. It is
1373                        NULL'ed by us.
1374                     */
1375                     t->displayTerm = odr_strdup(assoc->encode,
1376                                                 bsrr->entries[i].display_term);
1377                 }
1378                 t->whereInList = 0;
1379             }
1380         }
1381     }
1382     if (log_request)
1383     {
1384         WRBUF wr = wrbuf_alloc();
1385         const char *querytype = 0;
1386         const char *querystr = 0;
1387
1388         switch(srw_req->query_type)
1389         {
1390         case Z_SRW_query_type_pqf:
1391             querytype = "PQF";
1392             querystr = srw_req->scanClause.pqf;
1393             break;
1394         case Z_SRW_query_type_cql:
1395             querytype = "CQL";
1396             querystr = srw_req->scanClause.cql;
1397             break;
1398         default:
1399             querytype = "UNKNOWN";
1400             querystr = "";
1401         }
1402
1403         wrbuf_printf(wr, "SRWScan %s ", srw_req->database);
1404
1405         if (srw_res->num_diagnostics)
1406             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1407         else if (srw_res->num_terms)
1408             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1409         else
1410             wrbuf_printf(wr, "OK - - ");
1411
1412         wrbuf_printf(wr, ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
1413                      (srw_req->responsePosition ?
1414                       *srw_req->responsePosition : 1),
1415                      (srw_req->maximumTerms ?
1416                       *srw_req->maximumTerms : 1));
1417         /* there is no step size in SRU/W ??? */
1418         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1419         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1420         wrbuf_destroy(wr);
1421     }
1422
1423 }
1424
1425 static void srw_bend_update(association *assoc, request *req,
1426                             Z_SRW_PDU *sr,
1427                             Z_SRW_updateResponse *srw_res,
1428                             int *http_code)
1429 {
1430     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1431     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1432     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1433     *http_code = 404;
1434     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1435     if (assoc->init)
1436     {
1437         bend_update_rr rr;
1438         Z_SRW_extra_record *extra = srw_req->extra_record;
1439
1440         rr.stream = assoc->encode;
1441         rr.print = assoc->print;
1442         rr.num_bases = 1;
1443         rr.basenames = &srw_req->database;
1444         rr.operation = srw_req->operation;
1445         rr.operation_status = "failed";
1446         rr.record_id = 0;
1447         rr.record_versions = 0;
1448         rr.num_versions = 0;
1449         rr.record_packing = "string";
1450         rr.record_schema = 0;
1451         rr.record_data = 0;
1452         rr.extra_record_data = 0;
1453         rr.extra_request_data = 0;
1454         rr.extra_response_data = 0;
1455         rr.uri = 0;
1456         rr.message = 0;
1457         rr.details = 0;
1458
1459         *http_code = 200;
1460         if (rr.operation == 0)
1461         {
1462             yaz_add_sru_update_diagnostic(
1463                 assoc->encode, &srw_res->diagnostics,
1464                 &srw_res->num_diagnostics,
1465                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1466                 "action" );
1467             return;
1468         }
1469         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1470         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1471         if (!strcmp( rr.operation, "delete"))
1472         {
1473             if (srw_req->record && !srw_req->record->recordSchema)
1474             {
1475                 rr.record_schema = odr_strdup(
1476                     assoc->encode,
1477                     srw_req->record->recordSchema);
1478             }
1479             if (srw_req->record)
1480             {
1481                 rr.record_data = odr_strdupn(
1482                     assoc->encode,
1483                     srw_req->record->recordData_buf,
1484                     srw_req->record->recordData_len );
1485             }
1486             if (extra && extra->extraRecordData_len)
1487             {
1488                 rr.extra_record_data = odr_strdupn(
1489                     assoc->encode,
1490                     extra->extraRecordData_buf,
1491                     extra->extraRecordData_len );
1492             }
1493             if (srw_req->recordId)
1494                 rr.record_id = srw_req->recordId;
1495             else if (extra && extra->recordIdentifier)
1496                 rr.record_id = extra->recordIdentifier;
1497         }
1498         else if (!strcmp(rr.operation, "replace"))
1499         {
1500             if (srw_req->recordId)
1501                 rr.record_id = srw_req->recordId;
1502             else if (extra && extra->recordIdentifier)
1503                 rr.record_id = extra->recordIdentifier;
1504             else
1505             {
1506                 yaz_add_sru_update_diagnostic(
1507                     assoc->encode, &srw_res->diagnostics,
1508                     &srw_res->num_diagnostics,
1509                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1510                     "recordIdentifier");
1511             }
1512             if (!srw_req->record)
1513             {
1514                 yaz_add_sru_update_diagnostic(
1515                     assoc->encode, &srw_res->diagnostics,
1516                     &srw_res->num_diagnostics,
1517                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1518                     "record");
1519             }
1520             else
1521             {
1522                 if (srw_req->record->recordSchema)
1523                     rr.record_schema = odr_strdup(
1524                         assoc->encode, srw_req->record->recordSchema);
1525                 if (srw_req->record->recordData_len )
1526                 {
1527                     rr.record_data = odr_strdupn(assoc->encode,
1528                                                  srw_req->record->recordData_buf,
1529                                                  srw_req->record->recordData_len );
1530                 }
1531                 else
1532                 {
1533                     yaz_add_sru_update_diagnostic(
1534                         assoc->encode, &srw_res->diagnostics,
1535                         &srw_res->num_diagnostics,
1536                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1537                         "recordData" );
1538                 }
1539             }
1540             if (extra && extra->extraRecordData_len)
1541             {
1542                 rr.extra_record_data = odr_strdupn(
1543                     assoc->encode,
1544                     extra->extraRecordData_buf,
1545                     extra->extraRecordData_len );
1546             }
1547         }
1548         else if (!strcmp(rr.operation, "insert"))
1549         {
1550             if (srw_req->recordId)
1551                 rr.record_id = srw_req->recordId;
1552             else if (extra)
1553                 rr.record_id = extra->recordIdentifier;
1554
1555             if (srw_req->record)
1556             {
1557                 if (srw_req->record->recordSchema)
1558                     rr.record_schema = odr_strdup(
1559                         assoc->encode, srw_req->record->recordSchema);
1560
1561                 if (srw_req->record->recordData_len)
1562                     rr.record_data = odr_strdupn(
1563                         assoc->encode,
1564                         srw_req->record->recordData_buf,
1565                         srw_req->record->recordData_len );
1566             }
1567             if (extra && extra->extraRecordData_len)
1568             {
1569                 rr.extra_record_data = odr_strdupn(
1570                     assoc->encode,
1571                     extra->extraRecordData_buf,
1572                     extra->extraRecordData_len );
1573             }
1574         }
1575         else
1576             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1577                                           &srw_res->num_diagnostics,
1578                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1579                                           rr.operation );
1580
1581         if (srw_req->record)
1582         {
1583             const char *pack_str =
1584                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1585             if (pack_str)
1586                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1587         }
1588
1589         if (srw_req->num_recordVersions)
1590         {
1591             rr.record_versions = srw_req->recordVersions;
1592             rr.num_versions = srw_req->num_recordVersions;
1593         }
1594         if (srw_req->extraRequestData_len)
1595         {
1596             rr.extra_request_data = odr_strdupn(assoc->encode,
1597                                                 srw_req->extraRequestData_buf,
1598                                                 srw_req->extraRequestData_len );
1599         }
1600         if (srw_res->num_diagnostics == 0)
1601         {
1602             if ( assoc->init->bend_srw_update)
1603                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1604             else
1605                 yaz_add_sru_update_diagnostic(
1606                     assoc->encode, &srw_res->diagnostics,
1607                     &srw_res->num_diagnostics,
1608                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1609                     "No Update backend handler");
1610         }
1611
1612         if (rr.uri)
1613             yaz_add_srw_diagnostic_uri(assoc->encode,
1614                                        &srw_res->diagnostics,
1615                                        &srw_res->num_diagnostics,
1616                                        rr.uri,
1617                                        rr.message,
1618                                        rr.details);
1619         srw_res->recordId = rr.record_id;
1620         srw_res->operationStatus = rr.operation_status;
1621         srw_res->recordVersions = rr.record_versions;
1622         srw_res->num_recordVersions = rr.num_versions;
1623         if (srw_res->extraResponseData_len)
1624         {
1625             srw_res->extraResponseData_buf = rr.extra_response_data;
1626             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1627         }
1628         if (srw_res->num_diagnostics == 0 && rr.record_data)
1629         {
1630             srw_res->record = yaz_srw_get_record(assoc->encode);
1631             srw_res->record->recordSchema = rr.record_schema;
1632             if (rr.record_packing)
1633             {
1634                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1635
1636                 if (pack == -1)
1637                 {
1638                     pack = Z_SRW_recordPacking_string;
1639                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1640                             rr.record_packing);
1641                 }
1642                 srw_res->record->recordPacking = pack;
1643             }
1644             srw_res->record->recordData_buf = rr.record_data;
1645             srw_res->record->recordData_len = strlen(rr.record_data);
1646             if (rr.extra_record_data)
1647             {
1648                 Z_SRW_extra_record *ex =
1649                     yaz_srw_get_extra_record(assoc->encode);
1650                 srw_res->extra_record = ex;
1651                 ex->extraRecordData_buf = rr.extra_record_data;
1652                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1653             }
1654         }
1655     }
1656 }
1657
1658 /* check if path is OK (1); BAD (0) */
1659 static int check_path(const char *path)
1660 {
1661     if (*path != '/')
1662         return 0;
1663     if (strstr(path, ".."))
1664         return 0;
1665     return 1;
1666 }
1667
1668 static char *read_file(const char *fname, ODR o, size_t *sz)
1669 {
1670     char *buf;
1671     FILE *inf = fopen(fname, "rb");
1672     if (!inf)
1673         return 0;
1674
1675     fseek(inf, 0L, SEEK_END);
1676     *sz = ftell(inf);
1677     rewind(inf);
1678     buf = (char *) odr_malloc(o, *sz);
1679     if (fread(buf, 1, *sz, inf) != *sz)
1680         yaz_log(YLOG_WARN|YLOG_ERRNO, "short read %s", fname);
1681     fclose(inf);
1682     return buf;
1683 }
1684
1685 static void process_http_request(association *assoc, request *req)
1686 {
1687     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1688     ODR o = assoc->encode;
1689     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1690     Z_SRW_PDU *sr = 0;
1691     Z_SOAP *soap_package = 0;
1692     Z_GDU *p = 0;
1693     char *charset = 0;
1694     Z_HTTP_Response *hres = 0;
1695     int keepalive = 1;
1696     const char *stylesheet = 0; /* for now .. set later */
1697     Z_SRW_diagnostic *diagnostic = 0;
1698     int num_diagnostic = 0;
1699     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1700
1701     yaz_log(log_request, "%s %s HTTP/%s", hreq->method, hreq->path, hreq->version);
1702     if (!control_association(assoc, host, 0))
1703     {
1704         p = z_get_HTTP_Response(o, 404);
1705         r = 1;
1706     }
1707     if (r == 2 && assoc->server && assoc->server->docpath
1708         && hreq->path[0] == '/'
1709         &&
1710         /* check if path is a proper prefix of documentroot */
1711         strncmp(hreq->path+1, assoc->server->docpath,
1712                 strlen(assoc->server->docpath))
1713         == 0)
1714     {
1715         if (!check_path(hreq->path))
1716         {
1717             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1718             p = z_get_HTTP_Response(o, 404);
1719         }
1720         else
1721         {
1722             size_t content_size = 0;
1723             char *content_buf = read_file(hreq->path+1, o, &content_size);
1724             if (!content_buf)
1725             {
1726                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1727                 p = z_get_HTTP_Response(o, 404);
1728             }
1729             else
1730             {
1731                 const char *ctype = 0;
1732                 yaz_mime_types types = yaz_mime_types_create();
1733
1734                 yaz_mime_types_add(types, "xsl", "application/xml");
1735                 yaz_mime_types_add(types, "xml", "application/xml");
1736                 yaz_mime_types_add(types, "css", "text/css");
1737                 yaz_mime_types_add(types, "html", "text/html");
1738                 yaz_mime_types_add(types, "htm", "text/html");
1739                 yaz_mime_types_add(types, "txt", "text/plain");
1740                 yaz_mime_types_add(types, "js", "application/x-javascript");
1741
1742                 yaz_mime_types_add(types, "gif", "image/gif");
1743                 yaz_mime_types_add(types, "png", "image/png");
1744                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1745                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1746
1747                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1748                 if (!ctype)
1749                 {
1750                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1751                     p = z_get_HTTP_Response(o, 404);
1752                 }
1753                 else
1754                 {
1755                     p = z_get_HTTP_Response(o, 200);
1756                     hres = p->u.HTTP_Response;
1757                     hres->content_buf = content_buf;
1758                     hres->content_len = content_size;
1759                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1760                 }
1761                 yaz_mime_types_destroy(types);
1762             }
1763         }
1764         r = 1;
1765     }
1766
1767     if (r == 2)
1768     {
1769         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1770         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1771     }
1772     if (r == 2)  /* not taken */
1773     {
1774         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1775                            &diagnostic, &num_diagnostic);
1776         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1777     }
1778     if (r == 0)  /* decode SRW/SRU OK .. */
1779     {
1780         int http_code = 200;
1781         if (sr->which == Z_SRW_searchRetrieve_request)
1782         {
1783             Z_SRW_PDU *res =
1784                 yaz_srw_get_pdu(assoc->encode, Z_SRW_searchRetrieve_response,
1785                                 sr->srw_version);
1786             stylesheet = sr->u.request->stylesheet;
1787             if (num_diagnostic)
1788             {
1789                 res->u.response->diagnostics = diagnostic;
1790                 res->u.response->num_diagnostics = num_diagnostic;
1791             }
1792             else
1793             {
1794                 srw_bend_search(assoc, req, sr, res, &http_code);
1795             }
1796             if (http_code == 200)
1797                 soap_package->u.generic->p = res;
1798         }
1799         else if (sr->which == Z_SRW_explain_request)
1800         {
1801             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_explain_response,
1802                                              sr->srw_version);
1803             stylesheet = sr->u.explain_request->stylesheet;
1804             if (num_diagnostic)
1805             {
1806                 res->u.explain_response->diagnostics = diagnostic;
1807                 res->u.explain_response->num_diagnostics = num_diagnostic;
1808             }
1809             srw_bend_explain(assoc, req, sr,
1810                              res->u.explain_response, &http_code);
1811             if (http_code == 200)
1812                 soap_package->u.generic->p = res;
1813         }
1814         else if (sr->which == Z_SRW_scan_request)
1815         {
1816             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_scan_response,
1817                                              sr->srw_version);
1818             stylesheet = sr->u.scan_request->stylesheet;
1819             if (num_diagnostic)
1820             {
1821                 res->u.scan_response->diagnostics = diagnostic;
1822                 res->u.scan_response->num_diagnostics = num_diagnostic;
1823             }
1824             srw_bend_scan(assoc, req, sr,
1825                           res->u.scan_response, &http_code);
1826             if (http_code == 200)
1827                 soap_package->u.generic->p = res;
1828         }
1829         else if (sr->which == Z_SRW_update_request)
1830         {
1831             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_update_response,
1832                                              sr->srw_version);
1833             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1834             if (num_diagnostic)
1835             {
1836                 res->u.update_response->diagnostics = diagnostic;
1837                 res->u.update_response->num_diagnostics = num_diagnostic;
1838             }
1839             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1840             srw_bend_update(assoc, req, sr,
1841                             res->u.update_response, &http_code);
1842             if (http_code == 200)
1843                 soap_package->u.generic->p = res;
1844         }
1845         else
1846         {
1847             yaz_log(log_request, "SOAP ERROR");
1848             /* FIXME - what error, what query */
1849             http_code = 500;
1850             z_soap_error(assoc->encode, soap_package,
1851                          "SOAP-ENV:Client", "Bad method", 0);
1852         }
1853         if (http_code == 200 || http_code == 500)
1854         {
1855             static Z_SOAP_Handler soap_handlers[4] = {
1856 #if YAZ_HAVE_XML2
1857                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1858                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1859                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1860 #endif
1861                 {0, 0, 0}
1862             };
1863             char ctype[80];
1864             int ret;
1865             p = z_get_HTTP_Response(o, 200);
1866             hres = p->u.HTTP_Response;
1867
1868             if (!stylesheet && assoc->server)
1869                 stylesheet = assoc->server->stylesheet;
1870
1871             /* empty stylesheet means NO stylesheet */
1872             if (stylesheet && *stylesheet == '\0')
1873                 stylesheet = 0;
1874
1875             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1876                                        &hres->content_buf, &hres->content_len,
1877                                        soap_handlers, charset, stylesheet);
1878             hres->code = http_code;
1879
1880             strcpy(ctype, "text/xml");
1881             if (charset && strlen(charset) < sizeof(ctype)-30)
1882             {
1883                 strcat(ctype, "; charset=");
1884                 strcat(ctype, charset);
1885             }
1886             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1887         }
1888         else
1889             p = z_get_HTTP_Response(o, http_code);
1890     }
1891
1892     if (p == 0)
1893         p = z_get_HTTP_Response(o, 500);
1894     hres = p->u.HTTP_Response;
1895     if (!strcmp(hreq->version, "1.0"))
1896     {
1897         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1898         if (v && !strcmp(v, "Keep-Alive"))
1899             keepalive = 1;
1900         else
1901             keepalive = 0;
1902         hres->version = "1.0";
1903     }
1904     else
1905     {
1906         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1907         if (v && !strcmp(v, "close"))
1908             keepalive = 0;
1909         else
1910             keepalive = 1;
1911         hres->version = "1.1";
1912     }
1913     if (!keepalive)
1914     {
1915         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1916         assoc->state = ASSOC_DEAD;
1917         assoc->cs_get_mask = 0;
1918     }
1919     else
1920     {
1921         int t;
1922         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1923
1924         if (alive && isdigit(*(const unsigned char *) alive))
1925             t = atoi(alive);
1926         else
1927             t = 15;
1928         if (t < 0 || t > 3600)
1929             t = 3600;
1930         iochan_settimeout(assoc->client_chan,t);
1931         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1932     }
1933     process_gdu_response(assoc, req, p);
1934 }
1935
1936 static void process_gdu_request(association *assoc, request *req)
1937 {
1938     if (req->gdu_request->which == Z_GDU_Z3950)
1939     {
1940         char *msg = 0;
1941         req->apdu_request = req->gdu_request->u.z3950;
1942         if (process_z_request(assoc, req, &msg) < 0)
1943             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1944     }
1945     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1946         process_http_request(assoc, req);
1947     else
1948     {
1949         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1950     }
1951 }
1952
1953 /*
1954  * Initiate request processing.
1955  */
1956 static int process_z_request(association *assoc, request *req, char **msg)
1957 {
1958     int fd = -1;
1959     Z_APDU *res;
1960     int retval;
1961
1962     *msg = "Unknown Error";
1963     assert(req && req->state == REQUEST_IDLE);
1964     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1965     {
1966         *msg = "Missing InitRequest";
1967         return -1;
1968     }
1969     switch (req->apdu_request->which)
1970     {
1971     case Z_APDU_initRequest:
1972         res = process_initRequest(assoc, req); break;
1973     case Z_APDU_searchRequest:
1974         res = process_searchRequest(assoc, req, &fd); break;
1975     case Z_APDU_presentRequest:
1976         res = process_presentRequest(assoc, req, &fd); break;
1977     case Z_APDU_scanRequest:
1978         if (assoc->init->bend_scan)
1979             res = process_scanRequest(assoc, req, &fd);
1980         else
1981         {
1982             *msg = "Cannot handle Scan APDU";
1983             return -1;
1984         }
1985         break;
1986     case Z_APDU_extendedServicesRequest:
1987         if (assoc->init->bend_esrequest)
1988             res = process_ESRequest(assoc, req, &fd);
1989         else
1990         {
1991             *msg = "Cannot handle Extended Services APDU";
1992             return -1;
1993         }
1994         break;
1995     case Z_APDU_sortRequest:
1996         if (assoc->init->bend_sort)
1997             res = process_sortRequest(assoc, req, &fd);
1998         else
1999         {
2000             *msg = "Cannot handle Sort APDU";
2001             return -1;
2002         }
2003         break;
2004     case Z_APDU_close:
2005         process_close(assoc, req);
2006         return 0;
2007     case Z_APDU_deleteResultSetRequest:
2008         if (assoc->init->bend_delete)
2009             res = process_deleteRequest(assoc, req, &fd);
2010         else
2011         {
2012             *msg = "Cannot handle Delete APDU";
2013             return -1;
2014         }
2015         break;
2016     case Z_APDU_segmentRequest:
2017         if (assoc->init->bend_segment)
2018         {
2019             res = process_segmentRequest(assoc, req);
2020         }
2021         else
2022         {
2023             *msg = "Cannot handle Segment APDU";
2024             return -1;
2025         }
2026         break;
2027     case Z_APDU_triggerResourceControlRequest:
2028         return 0;
2029     default:
2030         *msg = "Bad APDU received";
2031         return -1;
2032     }
2033     if (res)
2034     {
2035         yaz_log(YLOG_DEBUG, "  result immediately available");
2036         retval = process_z_response(assoc, req, res);
2037     }
2038     else if (fd < 0)
2039     {
2040         yaz_log(YLOG_DEBUG, "  result unavailble");
2041         retval = 0;
2042     }
2043     else /* no result yet - one will be provided later */
2044     {
2045         IOCHAN chan;
2046
2047         /* Set up an I/O handler for the fd supplied by the backend */
2048
2049         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2050         req->state = REQUEST_PENDING;
2051         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2052             abort();
2053         iochan_setdata(chan, assoc);
2054         retval = 0;
2055     }
2056     return retval;
2057 }
2058
2059 /*
2060  * Handle message from the backend.
2061  */
2062 void backend_response(IOCHAN i, int event)
2063 {
2064     association *assoc = (association *)iochan_getdata(i);
2065     request *req = request_head(&assoc->incoming);
2066     Z_APDU *res;
2067     int fd;
2068
2069     yaz_log(YLOG_DEBUG, "backend_response");
2070     assert(assoc && req && req->state != REQUEST_IDLE);
2071     /* determine what it is we're waiting for */
2072     switch (req->apdu_request->which)
2073     {
2074         case Z_APDU_searchRequest:
2075             res = response_searchRequest(assoc, req, 0, &fd); break;
2076 #if 0
2077         case Z_APDU_presentRequest:
2078             res = response_presentRequest(assoc, req, 0, &fd); break;
2079         case Z_APDU_scanRequest:
2080             res = response_scanRequest(assoc, req, 0, &fd); break;
2081 #endif
2082         default:
2083             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2084             abort();
2085     }
2086     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2087     {
2088         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2089         do_close(assoc, Z_Close_systemProblem, 0);
2090         iochan_destroy(i);
2091         return;
2092     }
2093     else if (!res) /* no result yet - try again later */
2094     {
2095         yaz_log(YLOG_DEBUG, "   no result yet");
2096         iochan_setfd(i, fd); /* in case fd has changed */
2097     }
2098 }
2099
2100 /*
2101  * Encode response, and transfer the request structure to the outgoing queue.
2102  */
2103 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2104 {
2105     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2106
2107     if (assoc->print)
2108     {
2109         if (!z_GDU(assoc->print, &res, 0, 0))
2110             yaz_log(YLOG_WARN, "ODR print error: %s",
2111                 odr_errmsg(odr_geterror(assoc->print)));
2112         odr_reset(assoc->print);
2113     }
2114     if (!z_GDU(assoc->encode, &res, 0, 0))
2115     {
2116         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2117                 odr_errmsg(odr_geterror(assoc->decode)),
2118                 odr_getelement(assoc->decode));
2119         return -1;
2120     }
2121     req->response = odr_getbuf(assoc->encode, &req->len_response,
2122         &req->size_response);
2123     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2124     odr_reset(assoc->encode);
2125     req->state = REQUEST_IDLE;
2126     request_enq(&assoc->outgoing, req);
2127     /* turn the work over to the ir_session handler */
2128     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2129     assoc->cs_put_mask = EVENT_OUTPUT;
2130     /* Is there more work to be done? give that to the input handler too */
2131     for (;;)
2132     {
2133         req = request_head(&assoc->incoming);
2134         if (req && req->state == REQUEST_IDLE)
2135         {
2136             request_deq(&assoc->incoming);
2137             process_gdu_request(assoc, req);
2138         }
2139         else
2140             break;
2141     }
2142     return 0;
2143 }
2144
2145 /*
2146  * Encode response, and transfer the request structure to the outgoing queue.
2147  */
2148 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2149 {
2150     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2151     gres->which = Z_GDU_Z3950;
2152     gres->u.z3950 = res;
2153
2154     return process_gdu_response(assoc, req, gres);
2155 }
2156
2157 static char *get_vhost(Z_OtherInformation *otherInfo)
2158 {
2159     return yaz_oi_get_string_oid(&otherInfo, yaz_oid_userinfo_proxy, 1, 0);
2160 }
2161
2162 /*
2163  * Handle init request.
2164  * At the moment, we don't check the options
2165  * anywhere else in the code - we just try not to do anything that would
2166  * break a naive client. We'll toss 'em into the association block when
2167  * we need them there.
2168  */
2169 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2170 {
2171     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2172     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2173     Z_InitResponse *resp = apdu->u.initResponse;
2174     bend_initresult *binitres;
2175     char options[140];
2176     statserv_options_block *cb = 0;  /* by default no control for backend */
2177
2178     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2179         cb = statserv_getcontrol();  /* got control block for backend */
2180
2181     if (cb && assoc->backend)
2182         (*cb->bend_close)(assoc->backend);
2183
2184     yaz_log(log_requestdetail, "Got initRequest");
2185     if (req->implementationId)
2186         yaz_log(log_requestdetail, "Id:        %s",
2187                 req->implementationId);
2188     if (req->implementationName)
2189         yaz_log(log_requestdetail, "Name:      %s",
2190                 req->implementationName);
2191     if (req->implementationVersion)
2192         yaz_log(log_requestdetail, "Version:   %s",
2193                 req->implementationVersion);
2194
2195     assoc_init_reset(assoc);
2196
2197     assoc->init->auth = req->idAuthentication;
2198     assoc->init->referenceId = req->referenceId;
2199
2200     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2201     {
2202         Z_CharSetandLanguageNegotiation *negotiation =
2203             yaz_get_charneg_record (req->otherInfo);
2204         if (negotiation &&
2205             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2206             assoc->init->charneg_request = negotiation;
2207     }
2208
2209     /* by default named_result_sets is 0 .. Enable it if client asks for it. */
2210     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2211         assoc->init->named_result_sets = 1;
2212
2213     assoc->backend = 0;
2214     if (cb)
2215     {
2216         if (req->implementationVersion)
2217             yaz_log(log_requestdetail, "Config:    %s",
2218                     cb->configname);
2219
2220         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2221
2222         /* we have a backend control block, so call that init function */
2223         if (!(binitres = (*cb->bend_init)(assoc->init)))
2224         {
2225             yaz_log(YLOG_WARN, "Bad response from backend.");
2226             return 0;
2227         }
2228         assoc->backend = binitres->handle;
2229     }
2230     else
2231     {
2232         /* no backend. return error */
2233         binitres = (bend_initresult *)
2234             odr_malloc(assoc->encode, sizeof(*binitres));
2235         binitres->errstring = 0;
2236         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2237         iochan_settimeout(assoc->client_chan, 10);
2238     }
2239     if ((assoc->init->bend_sort))
2240         yaz_log(YLOG_DEBUG, "Sort handler installed");
2241     if ((assoc->init->bend_search))
2242         yaz_log(YLOG_DEBUG, "Search handler installed");
2243     if ((assoc->init->bend_present))
2244         yaz_log(YLOG_DEBUG, "Present handler installed");
2245     if ((assoc->init->bend_esrequest))
2246         yaz_log(YLOG_DEBUG, "ESRequest handler installed");
2247     if ((assoc->init->bend_delete))
2248         yaz_log(YLOG_DEBUG, "Delete handler installed");
2249     if ((assoc->init->bend_scan))
2250         yaz_log(YLOG_DEBUG, "Scan handler installed");
2251     if ((assoc->init->bend_segment))
2252         yaz_log(YLOG_DEBUG, "Segment handler installed");
2253
2254     resp->referenceId = req->referenceId;
2255     *options = '\0';
2256     /* let's tell the client what we can do */
2257     if (ODR_MASK_GET(req->options, Z_Options_search))
2258     {
2259         ODR_MASK_SET(resp->options, Z_Options_search);
2260         strcat(options, "srch");
2261     }
2262     if (ODR_MASK_GET(req->options, Z_Options_present))
2263     {
2264         ODR_MASK_SET(resp->options, Z_Options_present);
2265         strcat(options, " prst");
2266     }
2267     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2268         assoc->init->bend_delete)
2269     {
2270         ODR_MASK_SET(resp->options, Z_Options_delSet);
2271         strcat(options, " del");
2272     }
2273     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2274         assoc->init->bend_esrequest)
2275     {
2276         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2277         strcat(options, " extendedServices");
2278     }
2279     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets)
2280         && assoc->init->named_result_sets)
2281     {
2282         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2283         strcat(options, " namedresults");
2284     }
2285     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2286     {
2287         ODR_MASK_SET(resp->options, Z_Options_scan);
2288         strcat(options, " scan");
2289     }
2290     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2291     {
2292         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2293         strcat(options, " concurrop");
2294     }
2295     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2296     {
2297         ODR_MASK_SET(resp->options, Z_Options_sort);
2298         strcat(options, " sort");
2299     }
2300
2301     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2302     {
2303         Z_OtherInformationUnit *p0;
2304
2305         if (!assoc->init->charneg_response)
2306         {
2307             if (assoc->init->query_charset)
2308             {
2309                 assoc->init->charneg_response = yaz_set_response_charneg(
2310                     assoc->encode, assoc->init->query_charset, 0,
2311                     assoc->init->records_in_same_charset);
2312             }
2313             else
2314             {
2315                 yaz_log(YLOG_WARN, "default query_charset not defined by backend");
2316             }
2317         }
2318         if (assoc->init->charneg_response
2319             && (p0=yaz_oi_update(&resp->otherInfo, assoc->encode, NULL, 0, 0)))
2320         {
2321             p0->which = Z_OtherInfo_externallyDefinedInfo;
2322             p0->information.externallyDefinedInfo =
2323                 assoc->init->charneg_response;
2324             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2325             strcat(options, " negotiation");
2326         }
2327     }
2328     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2329         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2330
2331     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2332     {
2333         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2334         assoc->version = 1; /* 1 & 2 are equivalent */
2335     }
2336     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2337     {
2338         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2339         assoc->version = 2;
2340     }
2341     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2342     {
2343         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2344         assoc->version = 3;
2345     }
2346
2347     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2348
2349     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2350         assoc->maximumRecordSize = *req->maximumRecordSize;
2351
2352     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2353         assoc->preferredMessageSize = *req->preferredMessageSize;
2354
2355     resp->preferredMessageSize = &assoc->preferredMessageSize;
2356     resp->maximumRecordSize = &assoc->maximumRecordSize;
2357
2358     resp->implementationId = odr_prepend(assoc->encode,
2359                 assoc->init->implementation_id,
2360                 resp->implementationId);
2361
2362     resp->implementationName = odr_prepend(assoc->encode,
2363                 assoc->init->implementation_name,
2364                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2365
2366     if (binitres->errcode)
2367     {
2368         assoc->state = ASSOC_DEAD;
2369         resp->userInformationField =
2370             init_diagnostics(assoc->encode, binitres->errcode,
2371                              binitres->errstring);
2372         *resp->result = 0;
2373     }
2374     else
2375         assoc->state = ASSOC_UP;
2376
2377     if (log_request)
2378     {
2379         if (!req->idAuthentication)
2380             yaz_log(log_request, "Auth none");
2381         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2382         {
2383             const char *open = req->idAuthentication->u.open;
2384             const char *slash = strchr(open, '/');
2385             int len;
2386             if (slash)
2387                 len = slash - open;
2388             else
2389                 len = strlen(open);
2390                 yaz_log(log_request, "Auth open %.*s", len, open);
2391         }
2392         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2393         {
2394             const char *user = req->idAuthentication->u.idPass->userId;
2395             const char *group = req->idAuthentication->u.idPass->groupId;
2396             yaz_log(log_request, "Auth idPass %s %s",
2397                     user ? user : "-", group ? group : "-");
2398         }
2399         else if (req->idAuthentication->which
2400                  == Z_IdAuthentication_anonymous)
2401         {
2402             yaz_log(log_request, "Auth anonymous");
2403         }
2404         else
2405         {
2406             yaz_log(log_request, "Auth other");
2407         }
2408     }
2409     if (log_request)
2410     {
2411         WRBUF wr = wrbuf_alloc();
2412         wrbuf_printf(wr, "Init ");
2413         if (binitres->errcode)
2414             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2415         else
2416             wrbuf_printf(wr, "OK -");
2417         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2418                      (req->implementationId ? req->implementationId :"-"),
2419                      (req->implementationName ?
2420                       req->implementationName : "-"),
2421                      (req->implementationVersion ?
2422                       req->implementationVersion : "-")
2423             );
2424         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2425         wrbuf_destroy(wr);
2426     }
2427     return apdu;
2428 }
2429
2430 /*
2431  * Set the specified `errcode' and `errstring' into a UserInfo-1
2432  * external to be returned to the client in accordance with Z35.90
2433  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2434  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2435  */
2436 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2437 {
2438     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2439         addinfo ? " -- " : "", addinfo ? addinfo : "");
2440     return zget_init_diagnostics(odr, error, addinfo);
2441 }
2442
2443 /*
2444  * nonsurrogate diagnostic record.
2445  */
2446 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2447 {
2448     Z_Records *rec = (Z_Records *) odr_malloc(assoc->encode, sizeof(*rec));
2449
2450     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2451             addinfo ? " -- " : "", addinfo ? addinfo : "");
2452
2453     rec->which = Z_Records_NSD;
2454     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2455                                                            error, addinfo);
2456     return rec;
2457 }
2458
2459 /*
2460  * surrogate diagnostic.
2461  */
2462 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2463                                           const char *dbname,
2464                                           int error, const char *addinfo)
2465 {
2466     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2467             addinfo ? " -- " : "", addinfo ? addinfo : "");
2468     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2469 }
2470
2471 static Z_Records *pack_records(association *a, char *setname, Odr_int start,
2472                                Odr_int *num, Z_RecordComposition *comp,
2473                                Odr_int *next, Odr_int *pres,
2474                                Z_ReferenceId *referenceId,
2475                                Odr_oid *oid, int *errcode)
2476 {
2477     int recno, total_length = 0, toget = *num, dumped_records = 0;
2478     Z_Records *records =
2479         (Z_Records *) odr_malloc(a->encode, sizeof(*records));
2480     Z_NamePlusRecordList *reclist =
2481         (Z_NamePlusRecordList *) odr_malloc(a->encode, sizeof(*reclist));
2482     Z_NamePlusRecord **list =
2483         (Z_NamePlusRecord **) odr_malloc(a->encode, sizeof(*list) * toget);
2484
2485     records->which = Z_Records_DBOSD;
2486     records->u.databaseOrSurDiagnostics = reclist;
2487     reclist->num_records = 0;
2488     reclist->records = list;
2489     *pres = Z_PresentStatus_success;
2490     *num = 0;
2491     *next = 0;
2492
2493     yaz_log(log_requestdetail, "Request to pack " ODR_INT_PRINTF "+%d %s", start, toget, setname);
2494     yaz_log(log_requestdetail, "pms=" ODR_INT_PRINTF
2495             ", mrs=" ODR_INT_PRINTF, a->preferredMessageSize,
2496         a->maximumRecordSize);
2497     for (recno = start; reclist->num_records < toget; recno++)
2498     {
2499         bend_fetch_rr freq;
2500         Z_NamePlusRecord *thisrec;
2501         int this_length = 0;
2502         /*
2503          * we get the number of bytes allocated on the stream before any
2504          * allocation done by the backend - this should give us a reasonable
2505          * idea of the total size of the data so far.
2506          */
2507         total_length = odr_total(a->encode) - dumped_records;
2508         freq.errcode = 0;
2509         freq.errstring = 0;
2510         freq.basename = 0;
2511         freq.len = 0;
2512         freq.record = 0;
2513         freq.last_in_set = 0;
2514         freq.setname = setname;
2515         freq.surrogate_flag = 0;
2516         freq.number = recno;
2517         freq.comp = comp;
2518         freq.request_format = oid;
2519         freq.output_format = 0;
2520         freq.stream = a->encode;
2521         freq.print = a->print;
2522         freq.referenceId = referenceId;
2523         freq.schema = 0;
2524
2525         retrieve_fetch(a, &freq);
2526
2527         *next = freq.last_in_set ? 0 : recno + 1;
2528
2529         if (freq.errcode)
2530         {
2531             if (!freq.surrogate_flag) /* non-surrogate diagnostic i.e. global */
2532             {
2533                 char s[20];
2534                 *pres = Z_PresentStatus_failure;
2535                 /* for 'present request out of range',
2536                    set addinfo to record position if not set */
2537                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2538                                 freq.errstring == 0)
2539                 {
2540                     sprintf (s, "%d", recno);
2541                     freq.errstring = s;
2542                 }
2543                 if (errcode)
2544                     *errcode = freq.errcode;
2545                 return diagrec(a, freq.errcode, freq.errstring);
2546             }
2547             reclist->records[reclist->num_records] =
2548                 surrogatediagrec(a, freq.basename, freq.errcode,
2549                                  freq.errstring);
2550             reclist->num_records++;
2551             continue;
2552         }
2553         if (freq.record == 0)  /* no error and no record ? */
2554         {
2555             *next = 0;   /* signal end-of-set and stop */
2556             break;
2557         }
2558         if (freq.len >= 0)
2559             this_length = freq.len;
2560         else
2561             this_length = odr_total(a->encode) - total_length - dumped_records;
2562         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2563             this_length, total_length, dumped_records);
2564         if (a->preferredMessageSize > 0 &&
2565                 this_length + total_length > a->preferredMessageSize)
2566         {
2567             /* record is small enough, really */
2568             if (this_length <= a->preferredMessageSize && recno > start)
2569             {
2570                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2571                 *pres = Z_PresentStatus_partial_2;
2572                 break;
2573             }
2574             /* record can only be fetched by itself */
2575             if (this_length < a->maximumRecordSize)
2576             {
2577                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2578                 if (toget > 1)
2579                 {
2580                     yaz_log(YLOG_DEBUG, "  Dropped it");
2581                     reclist->records[reclist->num_records] =
2582                          surrogatediagrec(a, freq.basename, 16, 0);
2583                     reclist->num_records++;
2584                     dumped_records += this_length;
2585                     continue;
2586                 }
2587             }
2588             else /* too big entirely */
2589             {
2590                 yaz_log(log_requestdetail, "Record > maxrcdsz "
2591                         "this=%d max=" ODR_INT_PRINTF,
2592                         this_length, a->maximumRecordSize);
2593                 reclist->records[reclist->num_records] =
2594                     surrogatediagrec(a, freq.basename, 17, 0);
2595                 reclist->num_records++;
2596                 dumped_records += this_length;
2597                 continue;
2598             }
2599         }
2600
2601         if (!(thisrec = (Z_NamePlusRecord *)
2602               odr_malloc(a->encode, sizeof(*thisrec))))
2603             return 0;
2604         thisrec->databaseName = odr_strdup_null(a->encode, freq.basename);
2605         thisrec->which = Z_NamePlusRecord_databaseRecord;
2606
2607         if (!freq.output_format)
2608             freq.output_format = freq.request_format;
2609         thisrec->u.databaseRecord = z_ext_record_oid(
2610             a->encode, freq.output_format, freq.record, freq.len);
2611         if (!thisrec->u.databaseRecord)
2612             return 0;
2613         reclist->records[reclist->num_records] = thisrec;
2614         reclist->num_records++;
2615     }
2616     *num = reclist->num_records;
2617     return records;
2618 }
2619
2620 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2621     int *fd)
2622 {
2623     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2624     bend_search_rr *bsrr =
2625         (bend_search_rr *)nmem_malloc(reqb->request_mem, sizeof(*bsrr));
2626
2627     yaz_log(log_requestdetail, "Got SearchRequest.");
2628     bsrr->fd = fd;
2629     bsrr->request = reqb;
2630     bsrr->association = assoc;
2631     bsrr->referenceId = req->referenceId;
2632     save_referenceId (reqb, bsrr->referenceId);
2633     bsrr->srw_sortKeys = 0;
2634     bsrr->srw_setname = 0;
2635     bsrr->srw_setnameIdleTime = 0;
2636     bsrr->estimated_hit_count = 0;
2637     bsrr->partial_resultset = 0;
2638     bsrr->extra_args = 0;
2639     bsrr->extra_response_data = 0;
2640
2641     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2642     if (req->databaseNames)
2643     {
2644         int i;
2645         for (i = 0; i < req->num_databaseNames; i++)
2646             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2647     }
2648
2649     yaz_log_zquery_level(log_requestdetail,req->query);
2650
2651     if (assoc->init->bend_search)
2652     {
2653         bsrr->setname = req->resultSetName;
2654         bsrr->replace_set = *req->replaceIndicator;
2655         bsrr->num_bases = req->num_databaseNames;
2656         bsrr->basenames = req->databaseNames;
2657         bsrr->query = req->query;
2658         bsrr->stream = assoc->encode;
2659         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2660         bsrr->decode = assoc->decode;
2661         bsrr->print = assoc->print;
2662         bsrr->hits = 0;
2663         bsrr->errcode = 0;
2664         bsrr->errstring = NULL;
2665         bsrr->search_info = NULL;
2666
2667         if (assoc->server && assoc->server->cql_transform
2668             && req->query->which == Z_Query_type_104
2669             && req->query->u.type_104->which == Z_External_CQL)
2670         {
2671             /* have a CQL query and a CQL to PQF transform .. */
2672             int srw_errcode =
2673                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2674                         assoc->server->cql_transform, bsrr->query);
2675             if (srw_errcode)
2676                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2677         }
2678
2679         if (assoc->server && assoc->server->ccl_transform
2680             && req->query->which == Z_Query_type_2) /*CCL*/
2681         {
2682             /* have a CCL query and a CCL to PQF transform .. */
2683             int srw_errcode =
2684                 ccl2pqf(bsrr->stream, req->query->u.type_2,
2685                         assoc->server->ccl_transform, bsrr);
2686             if (srw_errcode)
2687                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2688         }
2689
2690         if (!bsrr->errcode)
2691             (assoc->init->bend_search)(assoc->backend, bsrr);
2692         if (!bsrr->request)  /* backend not ready with the search response */
2693             return 0;  /* should not be used any more */
2694     }
2695     else
2696     {
2697         /* FIXME - make a diagnostic for it */
2698         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2699     }
2700     return response_searchRequest(assoc, reqb, bsrr, fd);
2701 }
2702
2703 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2704
2705 /*
2706  * Prepare a searchresponse based on the backend results. We probably want
2707  * to look at making the fetching of records nonblocking as well, but
2708  * so far, we'll keep things simple.
2709  * If bsrt is null, that means we're called in response to a communications
2710  * event, and we'll have to get the response for ourselves.
2711  */
2712 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2713     bend_search_rr *bsrt, int *fd)
2714 {
2715     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2716     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2717     Z_SearchResponse *resp = (Z_SearchResponse *)
2718         odr_malloc(assoc->encode, sizeof(*resp));
2719     Odr_int *nulint = odr_intdup(assoc->encode, 0);
2720     Odr_int *next = odr_intdup(assoc->encode, 0);
2721     Odr_int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2722     int returnedrecs = 0;
2723
2724     apdu->which = Z_APDU_searchResponse;
2725     apdu->u.searchResponse = resp;
2726     resp->referenceId = req->referenceId;
2727     resp->additionalSearchInfo = 0;
2728     resp->otherInfo = 0;
2729     *fd = -1;
2730     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2731     {
2732         yaz_log(YLOG_FATAL, "Bad result from backend");
2733         return 0;
2734     }
2735     else if (bsrt->errcode)
2736     {
2737         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2738         resp->resultCount = nulint;
2739         resp->numberOfRecordsReturned = nulint;
2740         resp->nextResultSetPosition = nulint;
2741         resp->searchStatus = odr_booldup(assoc->encode, 0);
2742         resp->resultSetStatus = none;
2743         resp->presentStatus = 0;
2744     }
2745     else
2746     {
2747         bool_t *sr = odr_booldup(assoc->encode, 1);
2748         Odr_int *toget = odr_intdup(assoc->encode, 0);
2749         Z_RecordComposition comp, *compp = 0;
2750
2751         yaz_log(log_requestdetail, "resultCount: " ODR_INT_PRINTF, bsrt->hits);
2752
2753         resp->records = 0;
2754         resp->resultCount = &bsrt->hits;
2755
2756         comp.which = Z_RecordComp_simple;
2757         /* how many records does the user agent want, then? */
2758         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 void save_referenceId(request *reqb, Z_ReferenceId *refid)
3369 {
3370     if (refid)
3371     {
3372         reqb->len_refid = refid->len;
3373         reqb->refid = (char *)nmem_malloc(reqb->request_mem, refid->len);
3374         memcpy(reqb->refid, refid->buf, refid->len);
3375     }
3376     else
3377     {
3378         reqb->len_refid = 0;
3379         reqb->refid = NULL;
3380     }
3381 }
3382
3383 void bend_request_send(bend_association a, bend_request req, Z_APDU *res)
3384 {
3385     process_z_response(a, req, res);
3386 }
3387
3388 bend_request bend_request_mk(bend_association a)
3389 {
3390     request *nreq = request_get(&a->outgoing);
3391     nreq->request_mem = nmem_create();
3392     return nreq;
3393 }
3394
3395 Z_ReferenceId *bend_request_getid(ODR odr, bend_request req)
3396 {
3397     Z_ReferenceId *id;
3398     if (!req->refid)
3399         return 0;
3400     id = (Odr_oct *)odr_malloc(odr, sizeof(*odr));
3401     id->buf = (unsigned char *)odr_malloc(odr, req->len_refid);
3402     id->len = id->size = req->len_refid;
3403     memcpy(id->buf, req->refid, req->len_refid);
3404     return id;
3405 }
3406
3407 void bend_request_destroy(bend_request *req)
3408 {
3409     nmem_destroy((*req)->request_mem);
3410     request_release(*req);
3411     *req = NULL;
3412 }
3413
3414 int bend_backend_respond(bend_association a, bend_request req)
3415 {
3416     char *msg;
3417     int r;
3418     r = process_z_request(a, req, &msg);
3419     if (r < 0)
3420         yaz_log(YLOG_WARN, "%s", msg);
3421     return r;
3422 }
3423
3424 void bend_request_setdata(bend_request r, void *p)
3425 {
3426     r->clientData = p;
3427 }
3428
3429 void *bend_request_getdata(bend_request r)
3430 {
3431     return r->clientData;
3432 }
3433
3434 static Z_APDU *process_segmentRequest(association *assoc, request *reqb)
3435 {
3436     bend_segment_rr req;
3437
3438     req.segment = reqb->apdu_request->u.segmentRequest;
3439     req.stream = assoc->encode;
3440     req.decode = assoc->decode;
3441     req.print = assoc->print;
3442     req.association = assoc;
3443
3444     (*assoc->init->bend_segment)(assoc->backend, &req);
3445
3446     return 0;
3447 }
3448
3449 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3450 {
3451     bend_esrequest_rr esrequest;
3452     const char *ext_name = "unknown";
3453
3454     Z_ExtendedServicesRequest *req =
3455         reqb->apdu_request->u.extendedServicesRequest;
3456     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3457
3458     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3459
3460     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3461     esrequest.stream = assoc->encode;
3462     esrequest.decode = assoc->decode;
3463     esrequest.print = assoc->print;
3464     esrequest.errcode = 0;
3465     esrequest.errstring = NULL;
3466     esrequest.request = reqb;
3467     esrequest.association = assoc;
3468     esrequest.taskPackage = 0;
3469     esrequest.referenceId = req->referenceId;
3470
3471
3472     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3473     {
3474         switch(esrequest.esr->taskSpecificParameters->which)
3475         {
3476         case Z_External_itemOrder:
3477             ext_name = "ItemOrder"; break;
3478         case Z_External_update:
3479             ext_name = "Update"; break;
3480         case Z_External_update0:
3481             ext_name = "Update0"; break;
3482         case Z_External_ESAdmin:
3483             ext_name = "Admin"; break;
3484
3485         }
3486     }
3487
3488     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3489
3490     /* If the response is being delayed, return NULL */
3491     if (esrequest.request == NULL)
3492         return(NULL);
3493
3494     resp->referenceId = req->referenceId;
3495
3496     if (esrequest.errcode == -1)
3497     {
3498         /* Backend service indicates request will be processed */
3499         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3500         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3501     }
3502     else if (esrequest.errcode == 0)
3503     {
3504         /* Backend service indicates request will be processed */
3505         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3506         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3507     }
3508     else
3509     {
3510         Z_DiagRecs *diagRecs =
3511             zget_DiagRecs(assoc->encode, esrequest.errcode,
3512                           esrequest.errstring);
3513         /* Backend indicates error, request will not be processed */
3514         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3515         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3516         resp->num_diagnostics = diagRecs->num_diagRecs;
3517         resp->diagnostics = diagRecs->diagRecs;
3518         if (log_request)
3519         {
3520             WRBUF wr = wrbuf_alloc();
3521             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3522             yaz_log(log_request, "EsRequest %s", wrbuf_cstr(wr) );
3523             wrbuf_destroy(wr);
3524         }
3525
3526     }
3527     /* Do something with the members of bend_extendedservice */
3528     if (esrequest.taskPackage)
3529     {
3530         resp->taskPackage = z_ext_record_oid(
3531             assoc->encode, yaz_oid_recsyn_extended,
3532             (const char *)  esrequest.taskPackage, -1);
3533     }
3534     yaz_log(YLOG_DEBUG,"Send the result apdu");
3535     return apdu;
3536 }
3537
3538 int bend_assoc_is_alive(bend_association assoc)
3539 {
3540     if (assoc->state == ASSOC_DEAD)
3541         return 0; /* already marked as dead. Don't check I/O chan anymore */
3542
3543     return iochan_is_alive(assoc->client_chan);
3544 }
3545
3546
3547 /*
3548  * Local variables:
3549  * c-basic-offset: 4
3550  * c-file-style: "Stroustrup"
3551  * indent-tabs-mode: nil
3552  * End:
3553  * vim: shiftwidth=4 tabstop=8 expandtab
3554  */
3555