src/seshigh.c

   1 /* This file is part of the YAZ toolkit.
   2  * Copyright (C) 1995-2011 Index Data
   3  * See the file LICENSE for details.
   4  */
   5 /**
   6  * \file seshigh.c
   7  * \brief Implements GFS session logic.
   8  *
   9  * Frontend server logic.
  10  *
  11  * This code receives incoming APDUs, and handles client requests by means
  12  * of the backend API.
  13  *
  14  * Some of the code is getting quite involved, compared to simpler servers -
  15  * primarily because it is asynchronous both in the communication with
  16  * the user and the backend. We think the complexity will pay off in
  17  * the form of greater flexibility when more asynchronous facilities
  18  * are implemented.
  19  *
  20  * Memory management has become somewhat involved. In the simple case, where
  21  * only one PDU is pending at a time, it will simply reuse the same memory,
  22  * once it has found its working size. When we enable multiple concurrent
  23  * operations, perhaps even with multiple parallel calls to the backend, it
  24  * will maintain a pool of buffers for encoding and decoding, trying to
  25  * minimize memory allocation/deallocation during normal operation.
  26  *
  27  */
  28 #if HAVE_CONFIG_H
  29 #include <config.h>
  30 #endif
  31
  32 #include <limits.h>
  33 #include <stdlib.h>
  34 #include <stdio.h>
  35 #include <assert.h>
  36
  37 #if HAVE_SYS_TYPES_H
  38 #include <sys/types.h>
  39 #endif
  40 #if HAVE_SYS_STAT_H
  41 #include <sys/stat.h>
  42 #endif
  43
  44 #ifdef WIN32
  45 #include <io.h>
  46 #define S_ISREG(x) (x & _S_IFREG)
  47 #include <process.h>
  48 #endif
  49
  50 #if HAVE_UNISTD_H
  51 #include <unistd.h>
  52 #endif
  53
  54 #if YAZ_HAVE_XML2
  55 #include <libxml/parser.h>
  56 #include <libxml/tree.h>
  57 #endif
  58
  59 #include <yaz/xmalloc.h>
  60 #include <yaz/comstack.h>
  61 #include "eventl.h"
  62 #include "session.h"
  63 #include "mime.h"
  64 #include <yaz/proto.h>
  65 #include <yaz/oid_db.h>
  66 #include <yaz/log.h>
  67 #include <yaz/logrpn.h>
  68 #include <yaz/querytowrbuf.h>
  69 #include <yaz/statserv.h>
  70 #include <yaz/diagbib1.h>
  71 #include <yaz/charneg.h>
  72 #include <yaz/otherinfo.h>
  73 #include <yaz/yaz-util.h>
  74 #include <yaz/pquery.h>
  75 #include <yaz/oid_db.h>
  76
  77 #include <yaz/srw.h>
  78 #include <yaz/backend.h>
  79 #include <yaz/yaz-ccl.h>
  80
  81 static void process_gdu_request(association *assoc, request *req);
  82 static int process_z_request(association *assoc, request *req, char **msg);
  83 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  84 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  85 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  86 static Z_External *init_diagnostics(ODR odr, int errcode,
  87                                     const char *errstring);
  88 static Z_APDU *process_searchRequest(association *assoc, request *reqb);
  89 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  90                                       bend_search_rr *bsrr);
  91 static Z_APDU *process_presentRequest(association *assoc, request *reqb);
  92 static Z_APDU *process_scanRequest(association *assoc, request *reqb);
  93 static Z_APDU *process_sortRequest(association *assoc, request *reqb);
  94 static void process_close(association *assoc, request *reqb);
  95 static Z_APDU *process_deleteRequest(association *assoc, request *reqb);
  96 static Z_APDU *process_segmentRequest(association *assoc, request *reqb);
  97 static Z_APDU *process_ESRequest(association *assoc, request *reqb);
  98
  99 /* dynamic logging levels */
 100 static int logbits_set = 0;
 101 static int log_session = 0; /* one-line logs for session */
 102 static int log_sessiondetail = 0; /* more detailed stuff */
 103 static int log_request = 0; /* one-line logs for requests */
 104 static int log_requestdetail = 0;  /* more detailed stuff */
 105
 106 /** get_logbits sets global loglevel bits */
 107 static void get_logbits(void)
 108 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 109     if (!logbits_set)
 110     {
 111         logbits_set = 1;
 112         log_session = yaz_log_module_level("session");
 113         log_sessiondetail = yaz_log_module_level("sessiondetail");
 114         log_request = yaz_log_module_level("request");
 115         log_requestdetail = yaz_log_module_level("requestdetail");
 116     }
 117 }
 118
 119 static void wr_diag(WRBUF w, int error, const char *addinfo)
 120 {
 121     wrbuf_printf(w, "ERROR %d+", error);
 122     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
 123     if (addinfo)
 124     {
 125         wrbuf_puts(w, "+");
 126         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
 127     }
 128     wrbuf_puts(w, " ");
 129 }
 130
 131 static int odr_int_to_int(Odr_int v)
 132 {
 133     if (v >= INT_MAX)
 134         return INT_MAX;
 135     else if (v <= INT_MIN)
 136         return INT_MIN;
 137     else
 138         return (int) v;
 139 }
 140
 141 /*
 142  * Create and initialize a new association-handle.
 143  *  channel  : iochannel for the current line.
 144  *  link     : communications channel.
 145  * Returns: 0 or a new association handle.
 146  */
 147 association *create_association(IOCHAN channel, COMSTACK link,
 148                                 const char *apdufile)
 149 {
 150     association *anew;
 151
 152     if (!logbits_set)
 153         get_logbits();
 154     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 155         return 0;
 156     anew->init = 0;
 157     anew->version = 0;
 158     anew->last_control = 0;
 159     anew->client_chan = channel;
 160     anew->client_link = link;
 161     anew->cs_get_mask = 0;
 162     anew->cs_put_mask = 0;
 163     anew->cs_accept_mask = 0;
 164     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 165         !(anew->encode = odr_createmem(ODR_ENCODE)))
 166         return 0;
 167     if (apdufile && *apdufile)
 168     {
 169         FILE *f;
 170
 171         if (!(anew->print = odr_createmem(ODR_PRINT)))
 172             return 0;
 173         if (*apdufile == '@')
 174         {
 175             odr_setprint(anew->print, yaz_log_file());
 176         }
 177         else if (*apdufile != '-')
 178         {
 179             char filename[256];
 180             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 181             if (!(f = fopen(filename, "w")))
 182             {
 183                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 184                 return 0;
 185             }
 186             setvbuf(f, 0, _IONBF, 0);
 187             odr_setprint(anew->print, f);
 188         }
 189     }
 190     else
 191         anew->print = 0;
 192     anew->input_buffer = 0;
 193     anew->input_buffer_len = 0;
 194     anew->backend = 0;
 195     anew->state = ASSOC_NEW;
 196     request_initq(&anew->incoming);
 197     request_initq(&anew->outgoing);
 198     anew->proto = cs_getproto(link);
 199     anew->server = 0;
 200     return anew;
 201 }
 202
 203 /*
 204  * Free association and release resources.
 205  */
 206 void destroy_association(association *h)
 207 {
 208     statserv_options_block *cb = statserv_getcontrol();
 209     request *req;
 210
 211     xfree(h->init);
 212     odr_destroy(h->decode);
 213     odr_destroy(h->encode);
 214     if (h->print)
 215         odr_destroy(h->print);
 216     if (h->input_buffer)
 217     xfree(h->input_buffer);
 218     if (h->backend)
 219         (*cb->bend_close)(h->backend);
 220     while ((req = request_deq(&h->incoming)))
 221         request_release(req);
 222     while ((req = request_deq(&h->outgoing)))
 223         request_release(req);
 224     request_delq(&h->incoming);
 225     request_delq(&h->outgoing);
 226     xfree(h);
 227     xmalloc_trav("session closed");
 228 }
 229
 230 static void do_close_req(association *a, int reason, char *message,
 231                          request *req)
 232 {
 233     Z_APDU *apdu = zget_APDU(a->encode, Z_APDU_close);
 234     Z_Close *cls = apdu->u.close;
 235
 236     /* Purge request queue */
 237     while (request_deq(&a->incoming));
 238     while (request_deq(&a->outgoing));
 239     if (a->version >= 3)
 240     {
 241         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 242             reason, message ? message : "none");
 243         *cls->closeReason = reason;
 244         cls->diagnosticInformation = message;
 245         process_z_response(a, req, apdu);
 246         iochan_settimeout(a->client_chan, 20);
 247     }
 248     else
 249     {
 250         request_release(req);
 251         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 252         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 253         a->cs_put_mask = 0;
 254     }
 255     a->state = ASSOC_DEAD;
 256 }
 257
 258 static void do_close(association *a, int reason, char *message)
 259 {
 260     request *req = request_get(&a->outgoing);
 261     do_close_req(a, reason, message, req);
 262 }
 263
 264
 265 int ir_read(IOCHAN h, int event)
 266 {
 267     association *assoc = (association *)iochan_getdata(h);
 268     COMSTACK conn = assoc->client_link;
 269     request *req;
 270
 271     if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 272     {
 273         yaz_log(YLOG_DEBUG, "ir_session (input)");
 274         /* We aren't speaking to this fellow */
 275         if (assoc->state == ASSOC_DEAD)
 276         {
 277             yaz_log(log_sessiondetail, "Connection closed - end of session");
 278             cs_close(conn);
 279             destroy_association(assoc);
 280             iochan_destroy(h);
 281             return 0;
 282         }
 283         assoc->cs_get_mask = EVENT_INPUT;
 284
 285         do
 286         {
 287             int res = cs_get(conn, &assoc->input_buffer,
 288                              &assoc->input_buffer_len);
 289             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 290             {
 291                 yaz_log(log_session, "Connection error: %s res=%d",
 292                         cs_errmsg(cs_errno(conn)), res);
 293                 req = request_get(&assoc->incoming); /* get a new request */
 294                 do_close_req(assoc, Z_Close_protocolError,
 295                              "Incoming package too large", req);
 296                 return 0;
 297             }
 298             else if (res <= 0)
 299             {
 300                 yaz_log(log_session, "Connection closed by client");
 301                 cs_close(conn);
 302                 destroy_association(assoc);
 303                 iochan_destroy(h);
 304                 return 0;
 305             }
 306             else if (res == 1) /* incomplete read - wait for more  */
 307             {
 308                 if (conn->io_pending & CS_WANT_WRITE)
 309                     assoc->cs_get_mask |= EVENT_OUTPUT;
 310                 iochan_setflag(h, assoc->cs_get_mask);
 311                 return 0;
 312             }
 313             /* we got a complete PDU. Let's decode it */
 314             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 315                     assoc->input_buffer[0] & 0xff,
 316                     assoc->input_buffer[1] & 0xff,
 317                     assoc->input_buffer[2] & 0xff);
 318             req = request_get(&assoc->incoming); /* get a new request */
 319             odr_reset(assoc->decode);
 320             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 321             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 322             {
 323                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 324                         "[near byte %ld] ",
 325                         odr_errmsg(odr_geterror(assoc->decode)),
 326                         odr_getelement(assoc->decode),
 327                         (long) odr_offset(assoc->decode));
 328                 if (assoc->decode->error != OHTTP)
 329                 {
 330                     yaz_log(YLOG_WARN, "PDU dump:");
 331                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 332                     request_release(req);
 333                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 334                 }
 335                 else
 336                 {
 337                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 338                     assoc->state = ASSOC_DEAD;
 339                     process_gdu_response(assoc, req, p);
 340                 }
 341                 return 0;
 342             }
 343             req->request_mem = odr_extract_mem(assoc->decode);
 344             if (assoc->print)
 345             {
 346                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 347                     yaz_log(YLOG_WARN, "ODR print error: %s",
 348                             odr_errmsg(odr_geterror(assoc->print)));
 349                 odr_reset(assoc->print);
 350             }
 351             request_enq(&assoc->incoming, req);
 352         }
 353         while (cs_more(conn));
 354     }
 355     return 1;
 356 }
 357
 358 /*
 359  * This is where PDUs from the client are read and the further
 360  * processing is initiated. Flow of control moves down through the
 361  * various process_* functions below, until the encoded result comes back up
 362  * to the output handler in here.
 363  *
 364  *  h     : the I/O channel that has an outstanding event.
 365  *  event : the current outstanding event.
 366  */
 367 void ir_session(IOCHAN h, int event)
 368 {
 369     int res;
 370     association *assoc = (association *)iochan_getdata(h);
 371     COMSTACK conn = assoc->client_link;
 372     request *req;
 373
 374     assert(h && conn && assoc);
 375     if (event == EVENT_TIMEOUT)
 376     {
 377         if (assoc->state != ASSOC_UP)
 378         {
 379             yaz_log(log_session, "Timeout. Closing connection");
 380             /* do we need to lod this at all */
 381             cs_close(conn);
 382             destroy_association(assoc);
 383             iochan_destroy(h);
 384         }
 385         else
 386         {
 387             yaz_log(log_sessiondetail, "Timeout. Sending Z39.50 Close");
 388             do_close(assoc, Z_Close_lackOfActivity, 0);
 389         }
 390         return;
 391     }
 392     if (event & assoc->cs_accept_mask)
 393     {
 394         if (!cs_accept(conn))
 395         {
 396             yaz_log(YLOG_WARN, "accept failed");
 397             destroy_association(assoc);
 398             iochan_destroy(h);
 399             return;
 400         }
 401         iochan_clearflag(h, EVENT_OUTPUT);
 402         if (conn->io_pending)
 403         {   /* cs_accept didn't complete */
 404             assoc->cs_accept_mask =
 405                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 406                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 407
 408             iochan_setflag(h, assoc->cs_accept_mask);
 409         }
 410         else
 411         {   /* cs_accept completed. Prepare for reading (cs_get) */
 412             assoc->cs_accept_mask = 0;
 413             assoc->cs_get_mask = EVENT_INPUT;
 414             iochan_setflag(h, assoc->cs_get_mask);
 415         }
 416         return;
 417     }
 418     if (event & assoc->cs_get_mask) /* input */
 419     {
 420         if (!ir_read(h, event))
 421             return;
 422         req = request_head(&assoc->incoming);
 423         if (req->state == REQUEST_IDLE)
 424         {
 425             request_deq(&assoc->incoming);
 426             process_gdu_request(assoc, req);
 427         }
 428     }
 429     if (event & assoc->cs_put_mask)
 430     {
 431         request *req = request_head(&assoc->outgoing);
 432
 433         assoc->cs_put_mask = 0;
 434         yaz_log(YLOG_DEBUG, "ir_session (output)");
 435         req->state = REQUEST_PENDING;
 436         switch (res = cs_put(conn, req->response, req->len_response))
 437         {
 438         case -1:
 439             yaz_log(log_sessiondetail, "Connection closed by client");
 440             cs_close(conn);
 441             destroy_association(assoc);
 442             iochan_destroy(h);
 443             break;
 444         case 0: /* all sent - release the request structure */
 445             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 446 #if 0
 447             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 448                     req->response);
 449 #endif
 450             nmem_destroy(req->request_mem);
 451             request_deq(&assoc->outgoing);
 452             request_release(req);
 453             if (!request_head(&assoc->outgoing))
 454             {   /* restore mask for cs_get operation ... */
 455                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 456                 iochan_setflag(h, assoc->cs_get_mask);
 457                 if (assoc->state == ASSOC_DEAD)
 458                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 459             }
 460             else
 461             {
 462                 assoc->cs_put_mask = EVENT_OUTPUT;
 463             }
 464             break;
 465         default:
 466             if (conn->io_pending & CS_WANT_WRITE)
 467                 assoc->cs_put_mask |= EVENT_OUTPUT;
 468             if (conn->io_pending & CS_WANT_READ)
 469                 assoc->cs_put_mask |= EVENT_INPUT;
 470             iochan_setflag(h, assoc->cs_put_mask);
 471         }
 472     }
 473     if (event & EVENT_EXCEPT)
 474     {
 475         yaz_log(YLOG_WARN, "ir_session (exception)");
 476         cs_close(conn);
 477         destroy_association(assoc);
 478         iochan_destroy(h);
 479     }
 480 }
 481
 482 static int process_z_request(association *assoc, request *req, char **msg);
 483
 484
 485 static void assoc_init_reset(association *assoc)
 486 {
 487     xfree(assoc->init);
 488     assoc->init = (bend_initrequest *) xmalloc(sizeof(*assoc->init));
 489
 490     assoc->init->stream = assoc->encode;
 491     assoc->init->print = assoc->print;
 492     assoc->init->auth = 0;
 493     assoc->init->referenceId = 0;
 494     assoc->init->implementation_version = 0;
 495     assoc->init->implementation_id = 0;
 496     assoc->init->implementation_name = 0;
 497     assoc->init->query_charset = 0;
 498     assoc->init->records_in_same_charset = 0;
 499     assoc->init->bend_sort = NULL;
 500     assoc->init->bend_search = NULL;
 501     assoc->init->bend_present = NULL;
 502     assoc->init->bend_esrequest = NULL;
 503     assoc->init->bend_delete = NULL;
 504     assoc->init->bend_scan = NULL;
 505     assoc->init->bend_segment = NULL;
 506     assoc->init->bend_fetch = NULL;
 507     assoc->init->bend_explain = NULL;
 508     assoc->init->bend_srw_scan = NULL;
 509     assoc->init->bend_srw_update = NULL;
 510     assoc->init->named_result_sets = 0;
 511
 512     assoc->init->charneg_request = NULL;
 513     assoc->init->charneg_response = NULL;
 514
 515     assoc->init->decode = assoc->decode;
 516     assoc->init->peer_name =
 517         odr_strdup(assoc->encode, cs_addrstr(assoc->client_link));
 518
 519     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 520 }
 521
 522 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 523 {
 524     statserv_options_block *cb = statserv_getcontrol();
 525     if (!assoc->init)
 526     {
 527         const char *encoding = "UTF-8";
 528         Z_External *ce;
 529         bend_initresult *binitres;
 530
 531         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 532         assoc_init_reset(assoc);
 533
 534         if (sr->username)
 535         {
 536             Z_IdAuthentication *auth = (Z_IdAuthentication *)
 537                 odr_malloc(assoc->decode, sizeof(*auth));
 538             size_t len;
 539
 540             len = strlen(sr->username) + 1;
 541             if (sr->password)
 542                 len += strlen(sr->password) + 2;
 543             yaz_log(log_requestdetail, "username=%s password-len=%ld",
 544                     sr->username, (long)
 545                     (sr->password ? strlen(sr->password) : 0));
 546             auth->which = Z_IdAuthentication_open;
 547             auth->u.open = (char *) odr_malloc(assoc->decode, len);
 548             strcpy(auth->u.open, sr->username);
 549             if (sr->password && *sr->password)
 550             {
 551                 strcat(auth->u.open, "/");
 552                 strcat(auth->u.open, sr->password);
 553             }
 554             assoc->init->auth = auth;
 555         }
 556
 557 #if 1
 558         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 559         assoc->init->charneg_request = ce->u.charNeg3;
 560 #endif
 561         assoc->backend = 0;
 562         if (!(binitres = (*cb->bend_init)(assoc->init)))
 563         {
 564             assoc->state = ASSOC_DEAD;
 565             yaz_add_srw_diagnostic(assoc->encode, d, num,
 566                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 567             return 0;
 568         }
 569         assoc->backend = binitres->handle;
 570         assoc->init->auth = 0;
 571         if (binitres->errcode)
 572         {
 573             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 574             assoc->state = ASSOC_DEAD;
 575             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 576                                    binitres->errstring);
 577             return 0;
 578         }
 579         return 1;
 580     }
 581     return 1;
 582 }
 583
 584 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 585 {
 586 #if YAZ_HAVE_XML2
 587     yaz_record_conv_t rc = 0;
 588     const char *match_schema = 0;
 589     Odr_oid *match_syntax = 0;
 590
 591     if (assoc->server)
 592     {
 593         int r;
 594         const char *input_schema = yaz_get_esn(rr->comp);
 595         Odr_oid *input_syntax_raw = rr->request_format;
 596
 597         const char *backend_schema = 0;
 598         Odr_oid *backend_syntax = 0;
 599
 600         r = yaz_retrieval_request(assoc->server->retrieval,
 601                                   input_schema,
 602                                   input_syntax_raw,
 603                                   &match_schema,
 604                                   &match_syntax,
 605                                   &rc,
 606                                   &backend_schema,
 607                                   &backend_syntax);
 608         if (r == -1) /* error ? */
 609         {
 610             const char *details = yaz_retrieval_get_error(
 611                 assoc->server->retrieval);
 612
 613             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 614             if (details)
 615                 rr->errstring = odr_strdup(rr->stream, details);
 616             return -1;
 617         }
 618         else if (r == 1 || r == 3)
 619         {
 620             const char *details = input_schema;
 621             rr->errcode =
 622                 YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
 623             if (details)
 624                 rr->errstring = odr_strdup(rr->stream, details);
 625             return -1;
 626         }
 627         else if (r == 2)
 628         {
 629             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 630             if (input_syntax_raw)
 631             {
 632                 char oidbuf[OID_STR_MAX];
 633                 oid_oid_to_dotstring(input_syntax_raw, oidbuf);
 634                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 635             }
 636             return -1;
 637         }
 638         if (backend_schema)
 639         {
 640             yaz_set_esn(&rr->comp, backend_schema, odr_getmem(rr->stream));
 641         }
 642         if (backend_syntax)
 643             rr->request_format = backend_syntax;
 644     }
 645     (*assoc->init->bend_fetch)(assoc->backend, rr);
 646     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
 647     {   /* post conversion must take place .. */
 648         WRBUF output_record = wrbuf_alloc();
 649         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 650         if (r)
 651         {
 652             const char *details = yaz_record_conv_get_error(rc);
 653             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 654             if (details)
 655                 rr->errstring = odr_strdup(rr->stream, details);
 656         }
 657         else
 658         {
 659             rr->len = wrbuf_len(output_record);
 660             rr->record = (char *) odr_malloc(rr->stream, rr->len);
 661             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 662         }
 663         wrbuf_destroy(output_record);
 664     }
 665     if (match_syntax)
 666         rr->output_format = match_syntax;
 667     if (match_schema)
 668         rr->schema = odr_strdup(rr->stream, match_schema);
 669 #else
 670     (*assoc->init->bend_fetch)(assoc->backend, rr);
 671 #endif
 672     return 0;
 673 }
 674
 675 static int srw_bend_fetch(association *assoc, int pos,
 676                           Z_SRW_searchRetrieveRequest *srw_req,
 677                           Z_SRW_record *record,
 678                           const char **addinfo)
 679 {
 680     bend_fetch_rr rr;
 681     ODR o = assoc->encode;
 682
 683     rr.setname = "default";
 684     rr.number = pos;
 685     rr.referenceId = 0;
 686     rr.request_format = odr_oiddup(assoc->decode, yaz_oid_recsyn_xml);
 687
 688     rr.comp = (Z_RecordComposition *)
 689             odr_malloc(assoc->decode, sizeof(*rr.comp));
 690     rr.comp->which = Z_RecordComp_complex;
 691     rr.comp->u.complex = (Z_CompSpec *)
 692             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 693     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 694         odr_malloc(assoc->encode, sizeof(bool_t));
 695     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 696     rr.comp->u.complex->num_dbSpecific = 0;
 697     rr.comp->u.complex->dbSpecific = 0;
 698     rr.comp->u.complex->num_recordSyntax = 0;
 699     rr.comp->u.complex->recordSyntax = 0;
 700
 701     rr.comp->u.complex->generic = (Z_Specification *)
 702             odr_malloc(assoc->decode, sizeof(Z_Specification));
 703
 704     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 705     rr.comp->u.complex->generic->which = Z_Schema_uri;
 706     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 707
 708     /* ESN = recordSchema if recordSchema is present */
 709     rr.comp->u.complex->generic->elementSpec = 0;
 710     if (srw_req->recordSchema)
 711     {
 712         rr.comp->u.complex->generic->elementSpec =
 713             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 714         rr.comp->u.complex->generic->elementSpec->which =
 715             Z_ElementSpec_elementSetName;
 716         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 717             srw_req->recordSchema;
 718     }
 719
 720     rr.stream = assoc->encode;
 721     rr.print = assoc->print;
 722
 723     rr.basename = 0;
 724     rr.len = 0;
 725     rr.record = 0;
 726     rr.last_in_set = 0;
 727     rr.errcode = 0;
 728     rr.errstring = 0;
 729     rr.surrogate_flag = 0;
 730     rr.schema = srw_req->recordSchema;
 731
 732     if (!assoc->init->bend_fetch)
 733         return 1;
 734
 735     retrieve_fetch(assoc, &rr);
 736
 737     if (rr.errcode && rr.surrogate_flag)
 738     {
 739         int code = yaz_diag_bib1_to_srw(rr.errcode);
 740         yaz_mk_sru_surrogate(o, record, pos, code, rr.errstring);
 741         return 0;
 742     }
 743     else if (rr.len >= 0)
 744     {
 745         record->recordData_buf = rr.record;
 746         record->recordData_len = rr.len;
 747         record->recordPosition = odr_intdup(o, pos);
 748         record->recordSchema = odr_strdup_null(
 749             o, rr.schema ? rr.schema : srw_req->recordSchema);
 750     }
 751     if (rr.errcode)
 752     {
 753         *addinfo = rr.errstring;
 754         return rr.errcode;
 755     }
 756     return 0;
 757 }
 758
 759 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 760                    Z_Query *query_result, char **sortkeys_p)
 761 {
 762     /* have a CQL query and  CQL to PQF transform .. */
 763     CQL_parser cp = cql_parser_create();
 764     int r;
 765     int srw_errcode = 0;
 766     const char *add = 0;
 767     char rpn_buf[5120];
 768
 769     *sortkeys_p = 0;
 770     r = cql_parser_string(cp, cql);
 771     if (r)
 772     {
 773         srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 774     }
 775     if (!r)
 776     {
 777         struct cql_node *cn = cql_parser_result(cp);
 778
 779         /* Syntax OK */
 780         r = cql_transform_buf(ct, cn, rpn_buf, sizeof(rpn_buf)-1);
 781         if (r)
 782             srw_errcode = cql_transform_error(ct, &add);
 783         else
 784         {
 785             char out[100];
 786             int r = cql_sortby_to_sortkeys_buf(cn, out, sizeof(out)-1);
 787
 788             if (r == 0)
 789             {
 790                 if (*out)
 791                     yaz_log(log_requestdetail, "srw_sortKeys '%s'", out);
 792                 *sortkeys_p = odr_strdup(odr, out);
 793             }
 794             else
 795             {
 796                 yaz_log(log_requestdetail, "failed to create srw_sortKeys");
 797                 srw_errcode = YAZ_SRW_UNSUPP_SORT_TYPE;
 798             }
 799         }
 800     }
 801     if (!r)
 802     {
 803         /* Syntax & transform OK. */
 804         /* Convert PQF string to Z39.50 to RPN query struct */
 805         YAZ_PQF_Parser pp = yaz_pqf_create();
 806         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 807         if (!rpnquery)
 808         {
 809             size_t off;
 810             const char *pqf_msg;
 811             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 812             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 813                     pqf_msg, code);
 814             srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 815         }
 816         else
 817         {
 818             query_result->which = Z_Query_type_1;
 819             query_result->u.type_1 = rpnquery;
 820         }
 821         yaz_pqf_destroy(pp);
 822     }
 823     cql_parser_destroy(cp);
 824     return srw_errcode;
 825 }
 826
 827 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 828                         Z_AttributesPlusTerm *result)
 829 {
 830     Z_Query query;
 831     Z_RPNQuery *rpn;
 832     char *sortkeys = 0;
 833     int srw_error = cql2pqf(odr, cql, ct, &query, &sortkeys);
 834     if (srw_error)
 835         return srw_error;
 836     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 837         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* bad query type */
 838     rpn = query.u.type_1;
 839     if (!rpn->RPNStructure)
 840         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be structure */
 841     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 842         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be simple */
 843     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 844         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be be attributes + term */
 845     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 846            sizeof(*result));
 847     return 0;
 848 }
 849
 850
 851 static int ccl2pqf(ODR odr, const Odr_oct *ccl, CCL_bibset bibset,
 852                    bend_search_rr *bsrr)
 853 {
 854     char *ccl0;
 855     struct ccl_rpn_node *node;
 856     int errcode, pos;
 857
 858     ccl0 = odr_strdupn(odr, (char*) ccl->buf, ccl->len);
 859     if ((node = ccl_find_str(bibset, ccl0, &errcode, &pos)) == 0)
 860     {
 861         bsrr->errstring = (char*) ccl_err_msg(errcode);
 862         return YAZ_SRW_QUERY_SYNTAX_ERROR;    /* Query syntax error */
 863     }
 864
 865     bsrr->query->which = Z_Query_type_1;
 866     bsrr->query->u.type_1 = ccl_rpn_query(odr, node);
 867     return 0;
 868 }
 869
 870 static void srw_bend_search(association *assoc,
 871                             Z_SRW_PDU *sr,
 872                             Z_SRW_PDU *res,
 873                             int *http_code)
 874 {
 875     Z_SRW_searchRetrieveResponse *srw_res = res->u.response;
 876     int srw_error = 0;
 877     Z_External *ext;
 878     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 879
 880     *http_code = 200;
 881     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 882     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 883     if (srw_res->num_diagnostics == 0 && assoc->init)
 884     {
 885         bend_search_rr rr;
 886         rr.setname = "default";
 887         rr.replace_set = 1;
 888         rr.num_bases = 1;
 889         rr.basenames = &srw_req->database;
 890         rr.referenceId = 0;
 891         rr.srw_sortKeys = 0;
 892         rr.srw_setname = 0;
 893         rr.srw_setnameIdleTime = 0;
 894         rr.estimated_hit_count = 0;
 895         rr.partial_resultset = 0;
 896         rr.query = (Z_Query *) odr_malloc(assoc->decode, sizeof(*rr.query));
 897         rr.query->u.type_1 = 0;
 898         rr.extra_args = sr->extra_args;
 899         rr.extra_response_data = 0;
 900
 901         if (srw_req->query_type == Z_SRW_query_type_cql)
 902         {
 903             if (assoc->server && assoc->server->cql_transform)
 904             {
 905                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 906                                           assoc->server->cql_transform,
 907                                           rr.query,
 908                                           &rr.srw_sortKeys);
 909
 910                 if (srw_errcode)
 911                 {
 912                     yaz_add_srw_diagnostic(assoc->encode,
 913                                            &srw_res->diagnostics,
 914                                            &srw_res->num_diagnostics,
 915                                            srw_errcode, 0);
 916                 }
 917             }
 918             else
 919             {
 920                 /* CQL query to backend. Wrap it - Z39.50 style */
 921                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 922                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 923                                                         "1.2.840.10003.16.2");
 924                 ext->indirect_reference = 0;
 925                 ext->descriptor = 0;
 926                 ext->which = Z_External_CQL;
 927                 ext->u.cql = srw_req->query.cql;
 928
 929                 rr.query->which = Z_Query_type_104;
 930                 rr.query->u.type_104 =  ext;
 931             }
 932         }
 933         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 934         {
 935             Z_RPNQuery *RPNquery;
 936             YAZ_PQF_Parser pqf_parser;
 937
 938             pqf_parser = yaz_pqf_create();
 939
 940             RPNquery = yaz_pqf_parse(pqf_parser, assoc->decode,
 941                                      srw_req->query.pqf);
 942             if (!RPNquery)
 943             {
 944                 const char *pqf_msg;
 945                 size_t off;
 946                 int code = yaz_pqf_error(pqf_parser, &pqf_msg, &off);
 947                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 948                         code, pqf_msg, (long) off);
 949                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 950             }
 951
 952             rr.query->which = Z_Query_type_1;
 953             rr.query->u.type_1 =  RPNquery;
 954
 955             yaz_pqf_destroy(pqf_parser);
 956         }
 957         else
 958         {
 959             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 960                                    &srw_res->num_diagnostics,
 961                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 962         }
 963         if (rr.query->u.type_1)
 964         {
 965             rr.stream = assoc->encode;
 966             rr.decode = assoc->decode;
 967             rr.print = assoc->print;
 968             if (srw_req->sort.sortKeys)
 969                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 970                                              srw_req->sort.sortKeys);
 971             rr.association = assoc;
 972             rr.hits = 0;
 973             rr.errcode = 0;
 974             rr.errstring = 0;
 975             rr.search_info = 0;
 976             rr.search_input = 0;
 977             yaz_log_zquery_level(log_requestdetail,rr.query);
 978
 979             (assoc->init->bend_search)(assoc->backend, &rr);
 980             if (rr.errcode)
 981             {
 982                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 983                 {
 984                     *http_code = 404;
 985                 }
 986                 else
 987                 {
 988                     srw_error = yaz_diag_bib1_to_srw(rr.errcode);
 989                     yaz_add_srw_diagnostic(assoc->encode,
 990                                            &srw_res->diagnostics,
 991                                            &srw_res->num_diagnostics,
 992                                            srw_error, rr.errstring);
 993                 }
 994             }
 995             else
 996             {
 997                 int number = srw_req->maximumRecords ?
 998                     odr_int_to_int(*srw_req->maximumRecords) : 0;
 999                 int start = srw_req->startRecord ?
1000                     odr_int_to_int(*srw_req->startRecord) : 1;
1001
1002                 yaz_log(log_requestdetail, "Request to pack %d+%d out of "
1003                         ODR_INT_PRINTF,
1004                         start, number, rr.hits);
1005
1006                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
1007                 if (rr.srw_setname)
1008                 {
1009                     srw_res->resultSetId =
1010                         odr_strdup(assoc->encode, rr.srw_setname );
1011                     srw_res->resultSetIdleTime =
1012                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
1013                 }
1014
1015                 if (start > rr.hits || start < 1)
1016                 {
1017                     /* if hits<=0 and start=1 we don't return a diagnostic */
1018                     if (start != 1)
1019                         yaz_add_srw_diagnostic(
1020                             assoc->encode,
1021                             &srw_res->diagnostics, &srw_res->num_diagnostics,
1022                             YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1023                 }
1024                 else if (number > 0)
1025                 {
1026                     int i;
1027                     int ok = 1;
1028                     if (start + number > rr.hits)
1029                         number = odr_int_to_int(rr.hits) - start + 1;
1030
1031                     /* Call bend_present if defined */
1032                     if (assoc->init->bend_present)
1033                     {
1034                         bend_present_rr *bprr = (bend_present_rr*)
1035                             odr_malloc(assoc->decode, sizeof(*bprr));
1036                         bprr->setname = "default";
1037                         bprr->start = start;
1038                         bprr->number = number;
1039                         if (srw_req->recordSchema)
1040                         {
1041                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1042                                                                             sizeof(*bprr->comp));
1043                             bprr->comp->which = Z_RecordComp_simple;
1044                             bprr->comp->u.simple = (Z_ElementSetNames *)
1045                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1046                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1047                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1048                         }
1049                         else
1050                         {
1051                             bprr->comp = 0;
1052                         }
1053                         bprr->stream = assoc->encode;
1054                         bprr->referenceId = 0;
1055                         bprr->print = assoc->print;
1056                         bprr->association = assoc;
1057                         bprr->errcode = 0;
1058                         bprr->errstring = NULL;
1059                         (*assoc->init->bend_present)(assoc->backend, bprr);
1060
1061                         if (bprr->errcode)
1062                         {
1063                             srw_error = yaz_diag_bib1_to_srw(bprr->errcode);
1064                             yaz_add_srw_diagnostic(assoc->encode,
1065                                                    &srw_res->diagnostics,
1066                                                    &srw_res->num_diagnostics,
1067                                                    srw_error, bprr->errstring);
1068                             ok = 0;
1069                         }
1070                     }
1071
1072                     if (ok)
1073                     {
1074                         int j = 0;
1075                         int packing = Z_SRW_recordPacking_string;
1076                         if (srw_req->recordPacking)
1077                         {
1078                             packing =
1079                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1080                             if (packing == -1)
1081                                 packing = Z_SRW_recordPacking_string;
1082                         }
1083                         srw_res->records = (Z_SRW_record *)
1084                             odr_malloc(assoc->encode,
1085                                        number * sizeof(*srw_res->records));
1086
1087                         srw_res->extra_records = (Z_SRW_extra_record **)
1088                             odr_malloc(assoc->encode,
1089                                        number*sizeof(*srw_res->extra_records));
1090
1091                         for (i = 0; i<number; i++)
1092                         {
1093                             int errcode;
1094                             const char *addinfo = 0;
1095
1096                             srw_res->records[j].recordPacking = packing;
1097                             srw_res->records[j].recordData_buf = 0;
1098                             srw_res->extra_records[j] = 0;
1099                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1100                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1101                                                      srw_res->records + j,
1102                                                      &addinfo);
1103                             if (errcode)
1104                             {
1105                                 yaz_add_srw_diagnostic(assoc->encode,
1106                                                        &srw_res->diagnostics,
1107                                                        &srw_res->num_diagnostics,
1108                                                        yaz_diag_bib1_to_srw(errcode),
1109                                                        addinfo);
1110
1111                                 break;
1112                             }
1113                             if (srw_res->records[j].recordData_buf)
1114                                 j++;
1115                         }
1116                         srw_res->num_records = j;
1117                         if (!j)
1118                             srw_res->records = 0;
1119                     }
1120                 }
1121                 if (rr.extra_response_data)
1122                 {
1123                     res->extraResponseData_buf = rr.extra_response_data;
1124                     res->extraResponseData_len = strlen(rr.extra_response_data);
1125                 }
1126                 if (rr.estimated_hit_count || rr.partial_resultset)
1127                 {
1128                     yaz_add_srw_diagnostic(
1129                         assoc->encode,
1130                         &srw_res->diagnostics,
1131                         &srw_res->num_diagnostics,
1132                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1133                         0);
1134                 }
1135             }
1136         }
1137     }
1138     if (log_request)
1139     {
1140         const char *querystr = "?";
1141         const char *querytype = "?";
1142         WRBUF wr = wrbuf_alloc();
1143
1144         switch (srw_req->query_type)
1145         {
1146         case Z_SRW_query_type_cql:
1147             querytype = "CQL";
1148             querystr = srw_req->query.cql;
1149             break;
1150         case Z_SRW_query_type_pqf:
1151             querytype = "PQF";
1152             querystr = srw_req->query.pqf;
1153             break;
1154         }
1155         wrbuf_printf(wr, "SRWSearch %s ", srw_req->database);
1156         if (srw_res->num_diagnostics)
1157             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1158         else if (*http_code != 200)
1159             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1160         else if (srw_res->numberOfRecords)
1161         {
1162             wrbuf_printf(wr, "OK " ODR_INT_PRINTF,
1163                          (srw_res->numberOfRecords ?
1164                           *srw_res->numberOfRecords : 0));
1165         }
1166         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+%d",
1167                      (srw_res->resultSetId ?
1168                       srw_res->resultSetId : "-"),
1169                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1170                      srw_res->num_records);
1171         yaz_log(log_request, "%s %s: %s", wrbuf_cstr(wr), querytype, querystr);
1172         wrbuf_destroy(wr);
1173     }
1174 }
1175
1176 static char *srw_bend_explain_default(bend_explain_rr *rr)
1177 {
1178 #if YAZ_HAVE_XML2
1179     xmlNodePtr ptr = (xmlNode *) rr->server_node_ptr;
1180     if (!ptr)
1181         return 0;
1182     for (ptr = ptr->children; ptr; ptr = ptr->next)
1183     {
1184         if (ptr->type != XML_ELEMENT_NODE)
1185             continue;
1186         if (!strcmp((const char *) ptr->name, "explain"))
1187         {
1188             int len;
1189             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1190             xmlChar *buf_out;
1191             char *content;
1192
1193             ptr = xmlCopyNode(ptr, 1);
1194
1195             xmlDocSetRootElement(doc, ptr);
1196
1197             xmlDocDumpMemory(doc, &buf_out, &len);
1198             content = (char*) odr_malloc(rr->stream, 1+len);
1199             memcpy(content, buf_out, len);
1200             content[len] = '\0';
1201
1202             xmlFree(buf_out);
1203             xmlFreeDoc(doc);
1204             rr->explain_buf = content;
1205             return 0;
1206         }
1207     }
1208 #endif
1209     return 0;
1210 }
1211
1212 static void srw_bend_explain(association *assoc,
1213                              Z_SRW_PDU *sr,
1214                              Z_SRW_explainResponse *srw_res,
1215                              int *http_code)
1216 {
1217     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1218     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1219     *http_code = 404;
1220     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1221     if (assoc->init)
1222     {
1223         bend_explain_rr rr;
1224
1225         rr.stream = assoc->encode;
1226         rr.decode = assoc->decode;
1227         rr.print = assoc->print;
1228         rr.explain_buf = 0;
1229         rr.database = srw_req->database;
1230         if (assoc->server)
1231             rr.server_node_ptr = assoc->server->server_node_ptr;
1232         else
1233             rr.server_node_ptr = 0;
1234         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1235         if (assoc->init->bend_explain)
1236             (*assoc->init->bend_explain)(assoc->backend, &rr);
1237         else
1238             srw_bend_explain_default(&rr);
1239
1240         if (rr.explain_buf)
1241         {
1242             int packing = Z_SRW_recordPacking_string;
1243             if (srw_req->recordPacking)
1244             {
1245                 packing =
1246                     yaz_srw_str_to_pack(srw_req->recordPacking);
1247                 if (packing == -1)
1248                     packing = Z_SRW_recordPacking_string;
1249             }
1250             srw_res->record.recordSchema = rr.schema;
1251             srw_res->record.recordPacking = packing;
1252             srw_res->record.recordData_buf = rr.explain_buf;
1253             srw_res->record.recordData_len = strlen(rr.explain_buf);
1254             srw_res->record.recordPosition = 0;
1255             *http_code = 200;
1256         }
1257     }
1258 }
1259
1260 static void srw_bend_scan(association *assoc,
1261                           Z_SRW_PDU *sr,
1262                           Z_SRW_scanResponse *srw_res,
1263                           int *http_code)
1264 {
1265     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1266     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1267
1268     *http_code = 200;
1269     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1270     if (srw_res->num_diagnostics == 0 && assoc->init)
1271     {
1272         int step_size = 0;
1273         struct scan_entry *save_entries;
1274
1275         bend_scan_rr *bsrr = (bend_scan_rr *)
1276             odr_malloc(assoc->encode, sizeof(*bsrr));
1277         bsrr->num_bases = 1;
1278         bsrr->basenames = &srw_req->database;
1279
1280         bsrr->num_entries = srw_req->maximumTerms ?
1281             odr_int_to_int(*srw_req->maximumTerms) : 10;
1282         bsrr->term_position = srw_req->responsePosition ?
1283             odr_int_to_int(*srw_req->responsePosition) : 1;
1284
1285         bsrr->errcode = 0;
1286         bsrr->errstring = 0;
1287         bsrr->referenceId = 0;
1288         bsrr->stream = assoc->encode;
1289         bsrr->print = assoc->print;
1290         bsrr->step_size = &step_size;
1291         bsrr->entries = 0;
1292         bsrr->setname = 0;
1293
1294         if (bsrr->num_entries > 0)
1295         {
1296             int i;
1297             bsrr->entries = (struct scan_entry *)
1298                 odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1299                            bsrr->num_entries);
1300             for (i = 0; i<bsrr->num_entries; i++)
1301             {
1302                 bsrr->entries[i].term = 0;
1303                 bsrr->entries[i].occurrences = 0;
1304                 bsrr->entries[i].errcode = 0;
1305                 bsrr->entries[i].errstring = 0;
1306                 bsrr->entries[i].display_term = 0;
1307             }
1308         }
1309         save_entries = bsrr->entries;  /* save it so we can compare later */
1310
1311         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1312             assoc->init->bend_scan)
1313         {
1314             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1315
1316             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1317                                       &bsrr->attributeset,
1318                                       srw_req->scanClause.pqf);
1319             yaz_pqf_destroy(pqf_parser);
1320             bsrr->scanClause = 0;
1321             ((int (*)(void *, bend_scan_rr *))
1322              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1323         }
1324         else if (srw_req->query_type == Z_SRW_query_type_cql
1325                  && assoc->init->bend_scan && assoc->server
1326                  && assoc->server->cql_transform)
1327         {
1328             int srw_error;
1329             bsrr->scanClause = 0;
1330             bsrr->attributeset = 0;
1331             bsrr->term = (Z_AttributesPlusTerm *)
1332                 odr_malloc(assoc->decode, sizeof(*bsrr->term));
1333             srw_error = cql2pqf_scan(assoc->encode,
1334                                      srw_req->scanClause.cql,
1335                                      assoc->server->cql_transform,
1336                                      bsrr->term);
1337             if (srw_error)
1338                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1339                                        &srw_res->num_diagnostics,
1340                                        srw_error, 0);
1341             else
1342             {
1343                 ((int (*)(void *, bend_scan_rr *))
1344                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1345             }
1346         }
1347         else if (srw_req->query_type == Z_SRW_query_type_cql
1348                  && assoc->init->bend_srw_scan)
1349         {
1350             bsrr->term = 0;
1351             bsrr->attributeset = 0;
1352             bsrr->scanClause = srw_req->scanClause.cql;
1353             ((int (*)(void *, bend_scan_rr *))
1354              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1355         }
1356         else
1357         {
1358             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1359                                    &srw_res->num_diagnostics,
1360                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1361         }
1362         if (bsrr->errcode)
1363         {
1364             int srw_error;
1365             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1366             {
1367                 *http_code = 404;
1368                 return;
1369             }
1370             srw_error = yaz_diag_bib1_to_srw(bsrr->errcode);
1371
1372             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1373                                    &srw_res->num_diagnostics,
1374                                    srw_error, bsrr->errstring);
1375         }
1376         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1377         {
1378             int i;
1379             srw_res->terms = (Z_SRW_scanTerm*)
1380                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1381                            bsrr->num_entries);
1382
1383             srw_res->num_terms =  bsrr->num_entries;
1384             for (i = 0; i<bsrr->num_entries; i++)
1385             {
1386                 Z_SRW_scanTerm *t = srw_res->terms + i;
1387                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1388                 t->numberOfRecords =
1389                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1390                 t->displayTerm = 0;
1391                 if (save_entries == bsrr->entries &&
1392                     bsrr->entries[i].display_term)
1393                 {
1394                     /* the entries was _not_ set by the handler. So it's
1395                        safe to test for new member display_term. It is
1396                        NULL'ed by us.
1397                     */
1398                     t->displayTerm = odr_strdup(assoc->encode,
1399                                                 bsrr->entries[i].display_term);
1400                 }
1401                 t->whereInList = 0;
1402             }
1403         }
1404     }
1405     if (log_request)
1406     {
1407         WRBUF wr = wrbuf_alloc();
1408         const char *querytype = 0;
1409         const char *querystr = 0;
1410
1411         switch(srw_req->query_type)
1412         {
1413         case Z_SRW_query_type_pqf:
1414             querytype = "PQF";
1415             querystr = srw_req->scanClause.pqf;
1416             break;
1417         case Z_SRW_query_type_cql:
1418             querytype = "CQL";
1419             querystr = srw_req->scanClause.cql;
1420             break;
1421         default:
1422             querytype = "UNKNOWN";
1423             querystr = "";
1424         }
1425
1426         wrbuf_printf(wr, "SRWScan %s ", srw_req->database);
1427
1428         if (srw_res->num_diagnostics)
1429             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1430         else if (srw_res->num_terms)
1431             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1432         else
1433             wrbuf_printf(wr, "OK - - ");
1434
1435         wrbuf_printf(wr, ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
1436                      (srw_req->responsePosition ?
1437                       *srw_req->responsePosition : 1),
1438                      (srw_req->maximumTerms ?
1439                       *srw_req->maximumTerms : 1));
1440         /* there is no step size in SRU/W ??? */
1441         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1442         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1443         wrbuf_destroy(wr);
1444     }
1445
1446 }
1447
1448 static void srw_bend_update(association *assoc,
1449                             Z_SRW_PDU *sr,
1450                             Z_SRW_updateResponse *srw_res,
1451                             int *http_code)
1452 {
1453     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1454     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1455     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1456     *http_code = 404;
1457     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1458     if (assoc->init)
1459     {
1460         bend_update_rr rr;
1461         Z_SRW_extra_record *extra = srw_req->extra_record;
1462
1463         rr.stream = assoc->encode;
1464         rr.print = assoc->print;
1465         rr.num_bases = 1;
1466         rr.basenames = &srw_req->database;
1467         rr.operation = srw_req->operation;
1468         rr.operation_status = "failed";
1469         rr.record_id = 0;
1470         rr.record_versions = 0;
1471         rr.num_versions = 0;
1472         rr.record_packing = "string";
1473         rr.record_schema = 0;
1474         rr.record_data = 0;
1475         rr.extra_record_data = 0;
1476         rr.extra_request_data = 0;
1477         rr.extra_response_data = 0;
1478         rr.uri = 0;
1479         rr.message = 0;
1480         rr.details = 0;
1481
1482         *http_code = 200;
1483         if (rr.operation == 0)
1484         {
1485             yaz_add_sru_update_diagnostic(
1486                 assoc->encode, &srw_res->diagnostics,
1487                 &srw_res->num_diagnostics,
1488                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1489                 "action" );
1490             return;
1491         }
1492         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1493         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1494         if (!strcmp( rr.operation, "delete"))
1495         {
1496             if (srw_req->record && !srw_req->record->recordSchema)
1497             {
1498                 rr.record_schema = odr_strdup(
1499                     assoc->encode,
1500                     srw_req->record->recordSchema);
1501             }
1502             if (srw_req->record)
1503             {
1504                 rr.record_data = odr_strdupn(
1505                     assoc->encode,
1506                     srw_req->record->recordData_buf,
1507                     srw_req->record->recordData_len );
1508             }
1509             if (extra && extra->extraRecordData_len)
1510             {
1511                 rr.extra_record_data = odr_strdupn(
1512                     assoc->encode,
1513                     extra->extraRecordData_buf,
1514                     extra->extraRecordData_len );
1515             }
1516             if (srw_req->recordId)
1517                 rr.record_id = srw_req->recordId;
1518             else if (extra && extra->recordIdentifier)
1519                 rr.record_id = extra->recordIdentifier;
1520         }
1521         else if (!strcmp(rr.operation, "replace"))
1522         {
1523             if (srw_req->recordId)
1524                 rr.record_id = srw_req->recordId;
1525             else if (extra && extra->recordIdentifier)
1526                 rr.record_id = extra->recordIdentifier;
1527             else
1528             {
1529                 yaz_add_sru_update_diagnostic(
1530                     assoc->encode, &srw_res->diagnostics,
1531                     &srw_res->num_diagnostics,
1532                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1533                     "recordIdentifier");
1534             }
1535             if (!srw_req->record)
1536             {
1537                 yaz_add_sru_update_diagnostic(
1538                     assoc->encode, &srw_res->diagnostics,
1539                     &srw_res->num_diagnostics,
1540                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1541                     "record");
1542             }
1543             else
1544             {
1545                 if (srw_req->record->recordSchema)
1546                     rr.record_schema = odr_strdup(
1547                         assoc->encode, srw_req->record->recordSchema);
1548                 if (srw_req->record->recordData_len )
1549                 {
1550                     rr.record_data = odr_strdupn(assoc->encode,
1551                                                  srw_req->record->recordData_buf,
1552                                                  srw_req->record->recordData_len );
1553                 }
1554                 else
1555                 {
1556                     yaz_add_sru_update_diagnostic(
1557                         assoc->encode, &srw_res->diagnostics,
1558                         &srw_res->num_diagnostics,
1559                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1560                         "recordData" );
1561                 }
1562             }
1563             if (extra && extra->extraRecordData_len)
1564             {
1565                 rr.extra_record_data = odr_strdupn(
1566                     assoc->encode,
1567                     extra->extraRecordData_buf,
1568                     extra->extraRecordData_len );
1569             }
1570         }
1571         else if (!strcmp(rr.operation, "insert"))
1572         {
1573             if (srw_req->recordId)
1574                 rr.record_id = srw_req->recordId;
1575             else if (extra)
1576                 rr.record_id = extra->recordIdentifier;
1577
1578             if (srw_req->record)
1579             {
1580                 if (srw_req->record->recordSchema)
1581                     rr.record_schema = odr_strdup(
1582                         assoc->encode, srw_req->record->recordSchema);
1583
1584                 if (srw_req->record->recordData_len)
1585                     rr.record_data = odr_strdupn(
1586                         assoc->encode,
1587                         srw_req->record->recordData_buf,
1588                         srw_req->record->recordData_len );
1589             }
1590             if (extra && extra->extraRecordData_len)
1591             {
1592                 rr.extra_record_data = odr_strdupn(
1593                     assoc->encode,
1594                     extra->extraRecordData_buf,
1595                     extra->extraRecordData_len );
1596             }
1597         }
1598         else
1599             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1600                                           &srw_res->num_diagnostics,
1601                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1602                                           rr.operation );
1603
1604         if (srw_req->record)
1605         {
1606             const char *pack_str =
1607                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1608             if (pack_str)
1609                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1610         }
1611
1612         if (srw_req->num_recordVersions)
1613         {
1614             rr.record_versions = srw_req->recordVersions;
1615             rr.num_versions = srw_req->num_recordVersions;
1616         }
1617         if (srw_req->extraRequestData_len)
1618         {
1619             rr.extra_request_data = odr_strdupn(assoc->encode,
1620                                                 srw_req->extraRequestData_buf,
1621                                                 srw_req->extraRequestData_len );
1622         }
1623         if (srw_res->num_diagnostics == 0)
1624         {
1625             if ( assoc->init->bend_srw_update)
1626                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1627             else
1628                 yaz_add_sru_update_diagnostic(
1629                     assoc->encode, &srw_res->diagnostics,
1630                     &srw_res->num_diagnostics,
1631                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1632                     "No Update backend handler");
1633         }
1634
1635         if (rr.uri)
1636             yaz_add_srw_diagnostic_uri(assoc->encode,
1637                                        &srw_res->diagnostics,
1638                                        &srw_res->num_diagnostics,
1639                                        rr.uri,
1640                                        rr.message,
1641                                        rr.details);
1642         srw_res->recordId = rr.record_id;
1643         srw_res->operationStatus = rr.operation_status;
1644         srw_res->recordVersions = rr.record_versions;
1645         srw_res->num_recordVersions = rr.num_versions;
1646         if (srw_res->extraResponseData_len)
1647         {
1648             srw_res->extraResponseData_buf = rr.extra_response_data;
1649             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1650         }
1651         if (srw_res->num_diagnostics == 0 && rr.record_data)
1652         {
1653             srw_res->record = yaz_srw_get_record(assoc->encode);
1654             srw_res->record->recordSchema = rr.record_schema;
1655             if (rr.record_packing)
1656             {
1657                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1658
1659                 if (pack == -1)
1660                 {
1661                     pack = Z_SRW_recordPacking_string;
1662                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1663                             rr.record_packing);
1664                 }
1665                 srw_res->record->recordPacking = pack;
1666             }
1667             srw_res->record->recordData_buf = rr.record_data;
1668             srw_res->record->recordData_len = strlen(rr.record_data);
1669             if (rr.extra_record_data)
1670             {
1671                 Z_SRW_extra_record *ex =
1672                     yaz_srw_get_extra_record(assoc->encode);
1673                 srw_res->extra_record = ex;
1674                 ex->extraRecordData_buf = rr.extra_record_data;
1675                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1676             }
1677         }
1678     }
1679 }
1680
1681 /* check if path is OK (1); BAD (0) */
1682 static int check_path(const char *path)
1683 {
1684     if (*path != '/')
1685         return 0;
1686     if (strstr(path, ".."))
1687         return 0;
1688     return 1;
1689 }
1690
1691 static char *read_file(const char *fname, ODR o, size_t *sz)
1692 {
1693     char *buf;
1694     FILE *inf = fopen(fname, "rb");
1695     if (!inf)
1696         return 0;
1697
1698     fseek(inf, 0L, SEEK_END);
1699     *sz = ftell(inf);
1700     rewind(inf);
1701     buf = (char *) odr_malloc(o, *sz);
1702     if (fread(buf, 1, *sz, inf) != *sz)
1703         yaz_log(YLOG_WARN|YLOG_ERRNO, "short read %s", fname);
1704     fclose(inf);
1705     return buf;
1706 }
1707
1708 static void process_http_request(association *assoc, request *req)
1709 {
1710     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1711     ODR o = assoc->encode;
1712     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1713     Z_SRW_PDU *sr = 0;
1714     Z_SOAP *soap_package = 0;
1715     Z_GDU *p = 0;
1716     char *charset = 0;
1717     Z_HTTP_Response *hres = 0;
1718     int keepalive = 1;
1719     const char *stylesheet = 0; /* for now .. set later */
1720     Z_SRW_diagnostic *diagnostic = 0;
1721     int num_diagnostic = 0;
1722     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1723
1724     yaz_log(log_request, "%s %s HTTP/%s", hreq->method, hreq->path, hreq->version);
1725     if (!control_association(assoc, host, 0))
1726     {
1727         p = z_get_HTTP_Response(o, 404);
1728         r = 1;
1729     }
1730     if (r == 2 && assoc->server && assoc->server->docpath
1731         && hreq->path[0] == '/'
1732         &&
1733         /* check if path is a proper prefix of documentroot */
1734         strncmp(hreq->path+1, assoc->server->docpath,
1735                 strlen(assoc->server->docpath))
1736         == 0)
1737     {
1738         if (!check_path(hreq->path))
1739         {
1740             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1741             p = z_get_HTTP_Response(o, 404);
1742         }
1743         else
1744         {
1745             size_t content_size = 0;
1746             char *content_buf = read_file(hreq->path+1, o, &content_size);
1747             if (!content_buf)
1748             {
1749                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1750                 p = z_get_HTTP_Response(o, 404);
1751             }
1752             else
1753             {
1754                 const char *ctype = 0;
1755                 yaz_mime_types types = yaz_mime_types_create();
1756
1757                 yaz_mime_types_add(types, "xsl", "application/xml");
1758                 yaz_mime_types_add(types, "xml", "application/xml");
1759                 yaz_mime_types_add(types, "css", "text/css");
1760                 yaz_mime_types_add(types, "html", "text/html");
1761                 yaz_mime_types_add(types, "htm", "text/html");
1762                 yaz_mime_types_add(types, "txt", "text/plain");
1763                 yaz_mime_types_add(types, "js", "application/x-javascript");
1764
1765                 yaz_mime_types_add(types, "gif", "image/gif");
1766                 yaz_mime_types_add(types, "png", "image/png");
1767                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1768                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1769
1770                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1771                 if (!ctype)
1772                 {
1773                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1774                     p = z_get_HTTP_Response(o, 404);
1775                 }
1776                 else
1777                 {
1778                     p = z_get_HTTP_Response(o, 200);
1779                     hres = p->u.HTTP_Response;
1780                     hres->content_buf = content_buf;
1781                     hres->content_len = content_size;
1782                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1783                 }
1784                 yaz_mime_types_destroy(types);
1785             }
1786         }
1787         r = 1;
1788     }
1789
1790     if (r == 2)
1791     {
1792         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1793         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1794     }
1795     if (r == 2)  /* not taken */
1796     {
1797         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1798                            &diagnostic, &num_diagnostic);
1799         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1800     }
1801     if (r == 0)  /* decode SRW/SRU OK .. */
1802     {
1803         int http_code = 200;
1804         if (sr->which == Z_SRW_searchRetrieve_request)
1805         {
1806             Z_SRW_PDU *res =
1807                 yaz_srw_get_pdu(assoc->encode, Z_SRW_searchRetrieve_response,
1808                                 sr->srw_version);
1809             stylesheet = sr->u.request->stylesheet;
1810             if (num_diagnostic)
1811             {
1812                 res->u.response->diagnostics = diagnostic;
1813                 res->u.response->num_diagnostics = num_diagnostic;
1814             }
1815             else
1816             {
1817                 srw_bend_search(assoc, sr, res, &http_code);
1818             }
1819             if (http_code == 200)
1820                 soap_package->u.generic->p = res;
1821         }
1822         else if (sr->which == Z_SRW_explain_request)
1823         {
1824             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_explain_response,
1825                                              sr->srw_version);
1826             stylesheet = sr->u.explain_request->stylesheet;
1827             if (num_diagnostic)
1828             {
1829                 res->u.explain_response->diagnostics = diagnostic;
1830                 res->u.explain_response->num_diagnostics = num_diagnostic;
1831             }
1832             srw_bend_explain(assoc, sr, res->u.explain_response, &http_code);
1833             if (http_code == 200)
1834                 soap_package->u.generic->p = res;
1835         }
1836         else if (sr->which == Z_SRW_scan_request)
1837         {
1838             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_scan_response,
1839                                              sr->srw_version);
1840             stylesheet = sr->u.scan_request->stylesheet;
1841             if (num_diagnostic)
1842             {
1843                 res->u.scan_response->diagnostics = diagnostic;
1844                 res->u.scan_response->num_diagnostics = num_diagnostic;
1845             }
1846             srw_bend_scan(assoc, sr, res->u.scan_response, &http_code);
1847             if (http_code == 200)
1848                 soap_package->u.generic->p = res;
1849         }
1850         else if (sr->which == Z_SRW_update_request)
1851         {
1852             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_update_response,
1853                                              sr->srw_version);
1854             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1855             if (num_diagnostic)
1856             {
1857                 res->u.update_response->diagnostics = diagnostic;
1858                 res->u.update_response->num_diagnostics = num_diagnostic;
1859             }
1860             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1861             srw_bend_update(assoc, sr, res->u.update_response, &http_code);
1862             if (http_code == 200)
1863                 soap_package->u.generic->p = res;
1864         }
1865         else
1866         {
1867             yaz_log(log_request, "SOAP ERROR");
1868             /* FIXME - what error, what query */
1869             http_code = 500;
1870             z_soap_error(assoc->encode, soap_package,
1871                          "SOAP-ENV:Client", "Bad method", 0);
1872         }
1873         if (http_code == 200 || http_code == 500)
1874         {
1875             static Z_SOAP_Handler soap_handlers[4] = {
1876 #if YAZ_HAVE_XML2
1877                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1878                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1879                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1880 #endif
1881                 {0, 0, 0}
1882             };
1883             char ctype[80];
1884             p = z_get_HTTP_Response(o, 200);
1885             hres = p->u.HTTP_Response;
1886
1887             if (!stylesheet && assoc->server)
1888                 stylesheet = assoc->server->stylesheet;
1889
1890             /* empty stylesheet means NO stylesheet */
1891             if (stylesheet && *stylesheet == '\0')
1892                 stylesheet = 0;
1893
1894             z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1895                                  &hres->content_buf, &hres->content_len,
1896                                  soap_handlers, charset, stylesheet);
1897             hres->code = http_code;
1898
1899             strcpy(ctype, "text/xml");
1900             if (charset && strlen(charset) < sizeof(ctype)-30)
1901             {
1902                 strcat(ctype, "; charset=");
1903                 strcat(ctype, charset);
1904             }
1905             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1906         }
1907         else
1908             p = z_get_HTTP_Response(o, http_code);
1909     }
1910
1911     if (p == 0)
1912         p = z_get_HTTP_Response(o, 500);
1913     hres = p->u.HTTP_Response;
1914     if (!strcmp(hreq->version, "1.0"))
1915     {
1916         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1917         if (v && !strcmp(v, "Keep-Alive"))
1918             keepalive = 1;
1919         else
1920             keepalive = 0;
1921         hres->version = "1.0";
1922     }
1923     else
1924     {
1925         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1926         if (v && !strcmp(v, "close"))
1927             keepalive = 0;
1928         else
1929             keepalive = 1;
1930         hres->version = "1.1";
1931     }
1932     if (!keepalive || !assoc->last_control->keepalive)
1933     {
1934         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1935         assoc->state = ASSOC_DEAD;
1936         assoc->cs_get_mask = 0;
1937     }
1938     else
1939     {
1940         int t;
1941         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1942
1943         if (alive && yaz_isdigit(*(const unsigned char *) alive))
1944             t = atoi(alive);
1945         else
1946             t = 15;
1947         if (t < 0 || t > 3600)
1948             t = 3600;
1949         iochan_settimeout(assoc->client_chan,t);
1950         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1951     }
1952     process_gdu_response(assoc, req, p);
1953 }
1954
1955 static void process_gdu_request(association *assoc, request *req)
1956 {
1957     if (req->gdu_request->which == Z_GDU_Z3950)
1958     {
1959         char *msg = 0;
1960         req->apdu_request = req->gdu_request->u.z3950;
1961         if (process_z_request(assoc, req, &msg) < 0)
1962             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1963     }
1964     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1965         process_http_request(assoc, req);
1966     else
1967     {
1968         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1969     }
1970 }
1971
1972 /*
1973  * Initiate request processing.
1974  */
1975 static int process_z_request(association *assoc, request *req, char **msg)
1976 {
1977     Z_APDU *res;
1978     int retval;
1979
1980     *msg = "Unknown Error";
1981     assert(req && req->state == REQUEST_IDLE);
1982     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1983     {
1984         *msg = "Missing InitRequest";
1985         return -1;
1986     }
1987     switch (req->apdu_request->which)
1988     {
1989     case Z_APDU_initRequest:
1990         res = process_initRequest(assoc, req); break;
1991     case Z_APDU_searchRequest:
1992         res = process_searchRequest(assoc, req); break;
1993     case Z_APDU_presentRequest:
1994         res = process_presentRequest(assoc, req); break;
1995     case Z_APDU_scanRequest:
1996         if (assoc->init->bend_scan)
1997             res = process_scanRequest(assoc, req);
1998         else
1999         {
2000             *msg = "Cannot handle Scan APDU";
2001             return -1;
2002         }
2003         break;
2004     case Z_APDU_extendedServicesRequest:
2005         if (assoc->init->bend_esrequest)
2006             res = process_ESRequest(assoc, req);
2007         else
2008         {
2009             *msg = "Cannot handle Extended Services APDU";
2010             return -1;
2011         }
2012         break;
2013     case Z_APDU_sortRequest:
2014         if (assoc->init->bend_sort)
2015             res = process_sortRequest(assoc, req);
2016         else
2017         {
2018             *msg = "Cannot handle Sort APDU";
2019             return -1;
2020         }
2021         break;
2022     case Z_APDU_close:
2023         process_close(assoc, req);
2024         return 0;
2025     case Z_APDU_deleteResultSetRequest:
2026         if (assoc->init->bend_delete)
2027             res = process_deleteRequest(assoc, req);
2028         else
2029         {
2030             *msg = "Cannot handle Delete APDU";
2031             return -1;
2032         }
2033         break;
2034     case Z_APDU_segmentRequest:
2035         if (assoc->init->bend_segment)
2036         {
2037             res = process_segmentRequest(assoc, req);
2038         }
2039         else
2040         {
2041             *msg = "Cannot handle Segment APDU";
2042             return -1;
2043         }
2044         break;
2045     case Z_APDU_triggerResourceControlRequest:
2046         return 0;
2047     default:
2048         *msg = "Bad APDU received";
2049         return -1;
2050     }
2051     if (res)
2052     {
2053         yaz_log(YLOG_DEBUG, "  result immediately available");
2054         retval = process_z_response(assoc, req, res);
2055     }
2056     else
2057     {
2058         yaz_log(YLOG_DEBUG, "  result unavailable");
2059         retval = -1;
2060     }
2061     return retval;
2062 }
2063
2064 /*
2065  * Encode response, and transfer the request structure to the outgoing queue.
2066  */
2067 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2068 {
2069     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2070
2071     if (assoc->print)
2072     {
2073         if (!z_GDU(assoc->print, &res, 0, 0))
2074             yaz_log(YLOG_WARN, "ODR print error: %s",
2075                 odr_errmsg(odr_geterror(assoc->print)));
2076         odr_reset(assoc->print);
2077     }
2078     if (!z_GDU(assoc->encode, &res, 0, 0))
2079     {
2080         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2081                 odr_errmsg(odr_geterror(assoc->decode)),
2082                 odr_getelement(assoc->decode));
2083         return -1;
2084     }
2085     req->response = odr_getbuf(assoc->encode, &req->len_response,
2086         &req->size_response);
2087     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2088     odr_reset(assoc->encode);
2089     req->state = REQUEST_IDLE;
2090     request_enq(&assoc->outgoing, req);
2091     /* turn the work over to the ir_session handler */
2092     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2093     assoc->cs_put_mask = EVENT_OUTPUT;
2094     /* Is there more work to be done? give that to the input handler too */
2095     for (;;)
2096     {
2097         req = request_head(&assoc->incoming);
2098         if (req && req->state == REQUEST_IDLE)
2099         {
2100             request_deq(&assoc->incoming);
2101             process_gdu_request(assoc, req);
2102         }
2103         else
2104             break;
2105     }
2106     return 0;
2107 }
2108
2109 /*
2110  * Encode response, and transfer the request structure to the outgoing queue.
2111  */
2112 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2113 {
2114     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*gres));
2115     gres->which = Z_GDU_Z3950;
2116     gres->u.z3950 = res;
2117
2118     return process_gdu_response(assoc, req, gres);
2119 }
2120
2121 static char *get_vhost(Z_OtherInformation *otherInfo)
2122 {
2123     return yaz_oi_get_string_oid(&otherInfo, yaz_oid_userinfo_proxy, 1, 0);
2124 }
2125
2126 /*
2127  * Handle init request.
2128  * At the moment, we don't check the options
2129  * anywhere else in the code - we just try not to do anything that would
2130  * break a naive client. We'll toss 'em into the association block when
2131  * we need them there.
2132  */
2133 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2134 {
2135     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2136     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2137     Z_InitResponse *resp = apdu->u.initResponse;
2138     bend_initresult *binitres;
2139     char options[140];
2140     statserv_options_block *cb = 0;  /* by default no control for backend */
2141
2142     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2143         cb = statserv_getcontrol();  /* got control block for backend */
2144
2145     if (cb && assoc->backend)
2146         (*cb->bend_close)(assoc->backend);
2147
2148     yaz_log(log_requestdetail, "Got initRequest");
2149     if (req->implementationId)
2150         yaz_log(log_requestdetail, "Id:        %s",
2151                 req->implementationId);
2152     if (req->implementationName)
2153         yaz_log(log_requestdetail, "Name:      %s",
2154                 req->implementationName);
2155     if (req->implementationVersion)
2156         yaz_log(log_requestdetail, "Version:   %s",
2157                 req->implementationVersion);
2158
2159     assoc_init_reset(assoc);
2160
2161     assoc->init->auth = req->idAuthentication;
2162     assoc->init->referenceId = req->referenceId;
2163
2164     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2165     {
2166         Z_CharSetandLanguageNegotiation *negotiation =
2167             yaz_get_charneg_record (req->otherInfo);
2168         if (negotiation &&
2169             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2170             assoc->init->charneg_request = negotiation;
2171     }
2172
2173     /* by default named_result_sets is 0 .. Enable it if client asks for it. */
2174     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2175         assoc->init->named_result_sets = 1;
2176
2177     assoc->backend = 0;
2178     if (cb)
2179     {
2180         if (req->implementationVersion)
2181             yaz_log(log_requestdetail, "Config:    %s",
2182                     cb->configname);
2183
2184         iochan_settimeout(assoc->client_chan, cb->idle_timeout);
2185
2186         /* we have a backend control block, so call that init function */
2187         if (!(binitres = (*cb->bend_init)(assoc->init)))
2188         {
2189             yaz_log(YLOG_WARN, "Bad response from backend.");
2190             return 0;
2191         }
2192         assoc->backend = binitres->handle;
2193     }
2194     else
2195     {
2196         /* no backend. return error */
2197         binitres = (bend_initresult *)
2198             odr_malloc(assoc->encode, sizeof(*binitres));
2199         binitres->errstring = 0;
2200         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2201         iochan_settimeout(assoc->client_chan, 10);
2202     }
2203     if ((assoc->init->bend_sort))
2204         yaz_log(YLOG_DEBUG, "Sort handler installed");
2205     if ((assoc->init->bend_search))
2206         yaz_log(YLOG_DEBUG, "Search handler installed");
2207     if ((assoc->init->bend_present))
2208         yaz_log(YLOG_DEBUG, "Present handler installed");
2209     if ((assoc->init->bend_esrequest))
2210         yaz_log(YLOG_DEBUG, "ESRequest handler installed");
2211     if ((assoc->init->bend_delete))
2212         yaz_log(YLOG_DEBUG, "Delete handler installed");
2213     if ((assoc->init->bend_scan))
2214         yaz_log(YLOG_DEBUG, "Scan handler installed");
2215     if ((assoc->init->bend_segment))
2216         yaz_log(YLOG_DEBUG, "Segment handler installed");
2217
2218     resp->referenceId = req->referenceId;
2219     *options = '\0';
2220     /* let's tell the client what we can do */
2221     if (ODR_MASK_GET(req->options, Z_Options_search))
2222     {
2223         ODR_MASK_SET(resp->options, Z_Options_search);
2224         strcat(options, "srch");
2225     }
2226     if (ODR_MASK_GET(req->options, Z_Options_present))
2227     {
2228         ODR_MASK_SET(resp->options, Z_Options_present);
2229         strcat(options, " prst");
2230     }
2231     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2232         assoc->init->bend_delete)
2233     {
2234         ODR_MASK_SET(resp->options, Z_Options_delSet);
2235         strcat(options, " del");
2236     }
2237     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2238         assoc->init->bend_esrequest)
2239     {
2240         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2241         strcat(options, " extendedServices");
2242     }
2243     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets)
2244         && assoc->init->named_result_sets)
2245     {
2246         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2247         strcat(options, " namedresults");
2248     }
2249     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2250     {
2251         ODR_MASK_SET(resp->options, Z_Options_scan);
2252         strcat(options, " scan");
2253     }
2254     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2255     {
2256         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2257         strcat(options, " concurrop");
2258     }
2259     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2260     {
2261         ODR_MASK_SET(resp->options, Z_Options_sort);
2262         strcat(options, " sort");
2263     }
2264
2265     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2266     {
2267         Z_OtherInformationUnit *p0;
2268
2269         if (!assoc->init->charneg_response)
2270         {
2271             if (assoc->init->query_charset)
2272             {
2273                 assoc->init->charneg_response = yaz_set_response_charneg(
2274                     assoc->encode, assoc->init->query_charset, 0,
2275                     assoc->init->records_in_same_charset);
2276             }
2277             else
2278             {
2279                 yaz_log(YLOG_WARN, "default query_charset not defined by backend");
2280             }
2281         }
2282         if (assoc->init->charneg_response
2283             && (p0=yaz_oi_update(&resp->otherInfo, assoc->encode, NULL, 0, 0)))
2284         {
2285             p0->which = Z_OtherInfo_externallyDefinedInfo;
2286             p0->information.externallyDefinedInfo =
2287                 assoc->init->charneg_response;
2288             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2289             strcat(options, " negotiation");
2290         }
2291     }
2292     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2293         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2294
2295     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2296     {
2297         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2298         assoc->version = 1; /* 1 & 2 are equivalent */
2299     }
2300     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2301     {
2302         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2303         assoc->version = 2;
2304     }
2305     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2306     {
2307         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2308         assoc->version = 3;
2309     }
2310
2311     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2312
2313     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2314         assoc->maximumRecordSize = odr_int_to_int(*req->maximumRecordSize);
2315
2316     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2317         assoc->preferredMessageSize = odr_int_to_int(*req->preferredMessageSize);
2318
2319     resp->preferredMessageSize =
2320         odr_intdup(assoc->encode, assoc->preferredMessageSize);
2321     resp->maximumRecordSize =
2322         odr_intdup(assoc->encode, assoc->maximumRecordSize);
2323
2324     resp->implementationId = odr_prepend(assoc->encode,
2325                 assoc->init->implementation_id,
2326                 resp->implementationId);
2327
2328     resp->implementationName = odr_prepend(assoc->encode,
2329                 assoc->init->implementation_name,
2330                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2331
2332     if (binitres->errcode)
2333     {
2334         assoc->state = ASSOC_DEAD;
2335         resp->userInformationField =
2336             init_diagnostics(assoc->encode, binitres->errcode,
2337                              binitres->errstring);
2338         *resp->result = 0;
2339     }
2340     else
2341         assoc->state = ASSOC_UP;
2342
2343     if (log_request)
2344     {
2345         if (!req->idAuthentication)
2346             yaz_log(log_request, "Auth none");
2347         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2348         {
2349             const char *open = req->idAuthentication->u.open;
2350             const char *slash = strchr(open, '/');
2351             int len;
2352             if (slash)
2353                 len = slash - open;
2354             else
2355                 len = strlen(open);
2356                 yaz_log(log_request, "Auth open %.*s", len, open);
2357         }
2358         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2359         {
2360             const char *user = req->idAuthentication->u.idPass->userId;
2361             const char *group = req->idAuthentication->u.idPass->groupId;
2362             yaz_log(log_request, "Auth idPass %s %s",
2363                     user ? user : "-", group ? group : "-");
2364         }
2365         else if (req->idAuthentication->which
2366                  == Z_IdAuthentication_anonymous)
2367         {
2368             yaz_log(log_request, "Auth anonymous");
2369         }
2370         else
2371         {
2372             yaz_log(log_request, "Auth other");
2373         }
2374     }
2375     if (log_request)
2376     {
2377         WRBUF wr = wrbuf_alloc();
2378         wrbuf_printf(wr, "Init ");
2379         if (binitres->errcode)
2380             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2381         else
2382             wrbuf_printf(wr, "OK -");
2383         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2384                      (req->implementationId ? req->implementationId :"-"),
2385                      (req->implementationName ?
2386                       req->implementationName : "-"),
2387                      (req->implementationVersion ?
2388                       req->implementationVersion : "-")
2389             );
2390         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2391         wrbuf_destroy(wr);
2392     }
2393     return apdu;
2394 }
2395
2396 /*
2397  * Set the specified `errcode' and `errstring' into a UserInfo-1
2398  * external to be returned to the client in accordance with Z35.90
2399  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2400  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2401  */
2402 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2403 {
2404     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2405         addinfo ? " -- " : "", addinfo ? addinfo : "");
2406     return zget_init_diagnostics(odr, error, addinfo);
2407 }
2408
2409 /*
2410  * nonsurrogate diagnostic record.
2411  */
2412 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2413 {
2414     Z_Records *rec = (Z_Records *) odr_malloc(assoc->encode, sizeof(*rec));
2415
2416     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2417             addinfo ? " -- " : "", addinfo ? addinfo : "");
2418
2419     rec->which = Z_Records_NSD;
2420     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2421                                                            error, addinfo);
2422     return rec;
2423 }
2424
2425 /*
2426  * surrogate diagnostic.
2427  */
2428 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2429                                           const char *dbname,
2430                                           int error, const char *addinfo)
2431 {
2432     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2433             addinfo ? " -- " : "", addinfo ? addinfo : "");
2434     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2435 }
2436
2437 static Z_Records *pack_records(association *a, char *setname, Odr_int start,
2438                                Odr_int *num, Z_RecordComposition *comp,
2439                                Odr_int *next, Odr_int *pres,
2440                                Z_ReferenceId *referenceId,
2441                                Odr_oid *oid, int *errcode)
2442 {
2443     int recno, total_length = 0, dumped_records = 0;
2444     int toget = odr_int_to_int(*num);
2445     Z_Records *records =
2446         (Z_Records *) odr_malloc(a->encode, sizeof(*records));
2447     Z_NamePlusRecordList *reclist =
2448         (Z_NamePlusRecordList *) odr_malloc(a->encode, sizeof(*reclist));
2449
2450     records->which = Z_Records_DBOSD;
2451     records->u.databaseOrSurDiagnostics = reclist;
2452     reclist->num_records = 0;
2453
2454     if (toget < 0)
2455         return diagrec(a, YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE, 0);
2456     else if (toget == 0)
2457         reclist->records = odr_nullval();
2458     else
2459         reclist->records = (Z_NamePlusRecord **)
2460             odr_malloc(a->encode, sizeof(*reclist->records) * toget);
2461
2462     *pres = Z_PresentStatus_success;
2463     *num = 0;
2464     *next = 0;
2465
2466     yaz_log(log_requestdetail, "Request to pack " ODR_INT_PRINTF "+%d %s", start, toget, setname);
2467     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2468         a->maximumRecordSize);
2469     for (recno = odr_int_to_int(start); reclist->num_records < toget; recno++)
2470     {
2471         bend_fetch_rr freq;
2472         Z_NamePlusRecord *thisrec;
2473         int this_length = 0;
2474         /*
2475          * we get the number of bytes allocated on the stream before any
2476          * allocation done by the backend - this should give us a reasonable
2477          * idea of the total size of the data so far.
2478          */
2479         total_length = odr_total(a->encode) - dumped_records;
2480         freq.errcode = 0;
2481         freq.errstring = 0;
2482         freq.basename = 0;
2483         freq.len = 0;
2484         freq.record = 0;
2485         freq.last_in_set = 0;
2486         freq.setname = setname;
2487         freq.surrogate_flag = 0;
2488         freq.number = recno;
2489         freq.comp = comp;
2490         freq.request_format = oid;
2491         freq.output_format = 0;
2492         freq.stream = a->encode;
2493         freq.print = a->print;
2494         freq.referenceId = referenceId;
2495         freq.schema = 0;
2496
2497         retrieve_fetch(a, &freq);
2498
2499         *next = freq.last_in_set ? 0 : recno + 1;
2500
2501         if (freq.errcode)
2502         {
2503             if (!freq.surrogate_flag) /* non-surrogate diagnostic i.e. global */
2504             {
2505                 char s[20];
2506                 *pres = Z_PresentStatus_failure;
2507                 /* for 'present request out of range',
2508                    set addinfo to record position if not set */
2509                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2510                                 freq.errstring == 0)
2511                 {
2512                     sprintf(s, "%d", recno);
2513                     freq.errstring = s;
2514                 }
2515                 if (errcode)
2516                     *errcode = freq.errcode;
2517                 return diagrec(a, freq.errcode, freq.errstring);
2518             }
2519             reclist->records[reclist->num_records] =
2520                 surrogatediagrec(a, freq.basename, freq.errcode,
2521                                  freq.errstring);
2522             reclist->num_records++;
2523             continue;
2524         }
2525         if (freq.record == 0)  /* no error and no record ? */
2526         {
2527             *pres = Z_PresentStatus_partial_4;
2528             *next = 0;   /* signal end-of-set and stop */
2529             break;
2530         }
2531         if (freq.len >= 0)
2532             this_length = freq.len;
2533         else
2534             this_length = odr_total(a->encode) - total_length - dumped_records;
2535         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2536             this_length, total_length, dumped_records);
2537         if (a->preferredMessageSize > 0 &&
2538                 this_length + total_length > a->preferredMessageSize)
2539         {
2540             /* record is small enough, really */
2541             if (this_length <= a->preferredMessageSize && recno > start)
2542             {
2543                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2544                 *pres = Z_PresentStatus_partial_2;
2545                 if (*next > 0)
2546                     (*next)--;
2547                 break;
2548             }
2549             /* record can only be fetched by itself */
2550             if (this_length < a->maximumRecordSize)
2551             {
2552                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2553                 if (toget > 1)
2554                 {
2555                     yaz_log(YLOG_DEBUG, "  Dropped it");
2556                     reclist->records[reclist->num_records] =
2557                          surrogatediagrec(
2558                              a, freq.basename,
2559                              YAZ_BIB1_RECORD_EXCEEDS_PREFERRED_MESSAGE_SIZE, 0);
2560                     reclist->num_records++;
2561                     dumped_records += this_length;
2562                     continue;
2563                 }
2564             }
2565             else /* too big entirely */
2566             {
2567                 yaz_log(log_requestdetail, "Record > maxrcdsz "
2568                         "this=%d max=%d",
2569                         this_length, a->maximumRecordSize);
2570                 reclist->records[reclist->num_records] =
2571                     surrogatediagrec(
2572                         a, freq.basename,
2573                         YAZ_BIB1_RECORD_EXCEEDS_MAXIMUM_RECORD_SIZE, 0);
2574                 reclist->num_records++;
2575                 dumped_records += this_length;
2576                 continue;
2577             }
2578         }
2579
2580         if (!(thisrec = (Z_NamePlusRecord *)
2581               odr_malloc(a->encode, sizeof(*thisrec))))
2582             return 0;
2583         thisrec->databaseName = odr_strdup_null(a->encode, freq.basename);
2584         thisrec->which = Z_NamePlusRecord_databaseRecord;
2585
2586         if (!freq.output_format)
2587         {
2588             yaz_log(YLOG_WARN, "bend_fetch output_format not set");
2589             return 0;
2590         }
2591         thisrec->u.databaseRecord = z_ext_record_oid(
2592             a->encode, freq.output_format, freq.record, freq.len);
2593         if (!thisrec->u.databaseRecord)
2594             return 0;
2595         reclist->records[reclist->num_records] = thisrec;
2596         reclist->num_records++;
2597     }
2598     *num = reclist->num_records;
2599     return records;
2600 }
2601
2602 static Z_APDU *process_searchRequest(association *assoc, request *reqb)
2603 {
2604     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2605     bend_search_rr *bsrr =
2606         (bend_search_rr *)nmem_malloc(reqb->request_mem, sizeof(*bsrr));
2607
2608     yaz_log(log_requestdetail, "Got SearchRequest.");
2609     bsrr->association = assoc;
2610     bsrr->referenceId = req->referenceId;
2611     bsrr->srw_sortKeys = 0;
2612     bsrr->srw_setname = 0;
2613     bsrr->srw_setnameIdleTime = 0;
2614     bsrr->estimated_hit_count = 0;
2615     bsrr->partial_resultset = 0;
2616     bsrr->extra_args = 0;
2617     bsrr->extra_response_data = 0;
2618
2619     yaz_log(log_requestdetail, "ResultSet '%s'", req->resultSetName);
2620     if (req->databaseNames)
2621     {
2622         int i;
2623         for (i = 0; i < req->num_databaseNames; i++)
2624             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2625     }
2626
2627     yaz_log_zquery_level(log_requestdetail,req->query);
2628
2629     if (assoc->init->bend_search)
2630     {
2631         bsrr->setname = req->resultSetName;
2632         bsrr->replace_set = *req->replaceIndicator;
2633         bsrr->num_bases = req->num_databaseNames;
2634         bsrr->basenames = req->databaseNames;
2635         bsrr->query = req->query;
2636         bsrr->stream = assoc->encode;
2637         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2638         bsrr->decode = assoc->decode;
2639         bsrr->print = assoc->print;
2640         bsrr->hits = 0;
2641         bsrr->errcode = 0;
2642         bsrr->errstring = NULL;
2643         bsrr->search_info = NULL;
2644         bsrr->search_input = req->otherInfo;
2645
2646         if (assoc->server && assoc->server->cql_transform
2647             && req->query->which == Z_Query_type_104
2648             && req->query->u.type_104->which == Z_External_CQL)
2649         {
2650             /* have a CQL query and a CQL to PQF transform .. */
2651             int srw_errcode =
2652                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2653                         assoc->server->cql_transform, bsrr->query,
2654                         &bsrr->srw_sortKeys);
2655             if (srw_errcode)
2656                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2657         }
2658
2659         if (assoc->server && assoc->server->ccl_transform
2660             && req->query->which == Z_Query_type_2) /*CCL*/
2661         {
2662             /* have a CCL query and a CCL to PQF transform .. */
2663             int srw_errcode =
2664                 ccl2pqf(bsrr->stream, req->query->u.type_2,
2665                         assoc->server->ccl_transform, bsrr);
2666             if (srw_errcode)
2667                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2668         }
2669
2670         if (!bsrr->errcode)
2671             (assoc->init->bend_search)(assoc->backend, bsrr);
2672     }
2673     else
2674     {
2675         /* FIXME - make a diagnostic for it */
2676         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2677     }
2678     return response_searchRequest(assoc, reqb, bsrr);
2679 }
2680
2681 /*
2682  * Prepare a searchresponse based on the backend results. We probably want
2683  * to look at making the fetching of records nonblocking as well, but
2684  * so far, we'll keep things simple.
2685  * If bsrt is null, that means we're called in response to a communications
2686  * event, and we'll have to get the response for ourselves.
2687  */
2688 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2689                                       bend_search_rr *bsrt)
2690 {
2691     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2692     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2693     Z_SearchResponse *resp = (Z_SearchResponse *)
2694         odr_malloc(assoc->encode, sizeof(*resp));
2695     Odr_int *nulint = odr_intdup(assoc->encode, 0);
2696     Odr_int *next = odr_intdup(assoc->encode, 0);
2697     Odr_int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2698     Odr_int returnedrecs = 0;
2699
2700     apdu->which = Z_APDU_searchResponse;
2701     apdu->u.searchResponse = resp;
2702     resp->referenceId = req->referenceId;
2703     resp->additionalSearchInfo = 0;
2704     resp->otherInfo = 0;
2705     if (!bsrt)
2706     {
2707         yaz_log(YLOG_FATAL, "Bad result from backend");
2708         return 0;
2709     }
2710     else if (bsrt->errcode)
2711     {
2712         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2713         resp->resultCount = nulint;
2714         resp->numberOfRecordsReturned = nulint;
2715         resp->nextResultSetPosition = nulint;
2716         resp->searchStatus = odr_booldup(assoc->encode, 0);
2717         resp->resultSetStatus = none;
2718         resp->presentStatus = 0;
2719     }
2720     else
2721     {
2722         bool_t *sr = odr_booldup(assoc->encode, 1);
2723         Odr_int *toget = odr_intdup(assoc->encode, 0);
2724         Z_RecordComposition comp, *compp = 0;
2725
2726         yaz_log(log_requestdetail, "resultCount: " ODR_INT_PRINTF, bsrt->hits);
2727
2728         resp->records = 0;
2729         resp->resultCount = &bsrt->hits;
2730
2731         comp.which = Z_RecordComp_simple;
2732         /* how many records does the user agent want, then? */
2733         if (bsrt->hits < 0)
2734             *toget = 0;
2735         else if (bsrt->hits <= *req->smallSetUpperBound)
2736         {
2737             *toget = bsrt->hits;
2738             if ((comp.u.simple = req->smallSetElementSetNames))
2739                 compp = &comp;
2740         }
2741         else if (bsrt->hits < *req->largeSetLowerBound)
2742         {
2743             *toget = *req->mediumSetPresentNumber;
2744             if (*toget > bsrt->hits)
2745                 *toget = bsrt->hits;
2746             if ((comp.u.simple = req->mediumSetElementSetNames))
2747                 compp = &comp;
2748         }
2749         else
2750             *toget = 0;
2751
2752         if (*toget && !resp->records)
2753         {
2754             Odr_int *presst = odr_intdup(assoc->encode, 0);
2755             /* Call bend_present if defined */
2756             if (assoc->init->bend_present)
2757             {
2758                 bend_present_rr *bprr = (bend_present_rr *)
2759                     nmem_malloc(reqb->request_mem, sizeof(*bprr));
2760                 bprr->setname = req->resultSetName;
2761                 bprr->start = 1;
2762                 bprr->number = odr_int_to_int(*toget);
2763                 bprr->format = req->preferredRecordSyntax;
2764                 bprr->comp = compp;
2765                 bprr->referenceId = req->referenceId;
2766                 bprr->stream = assoc->encode;
2767                 bprr->print = assoc->print;
2768                 bprr->association = assoc;
2769                 bprr->errcode = 0;
2770                 bprr->errstring = NULL;
2771                 (*assoc->init->bend_present)(assoc->backend, bprr);
2772
2773                 if (bprr->errcode)
2774                 {
2775                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2776                     *resp->presentStatus = Z_PresentStatus_failure;
2777                 }
2778             }
2779
2780             if (!resp->records)
2781                 resp->records = pack_records(
2782                     assoc, req->resultSetName, 1,
2783                     toget, compp, next, presst, req->referenceId,
2784                     req->preferredRecordSyntax, NULL);
2785             if (!resp->records)
2786                 return 0;
2787             resp->numberOfRecordsReturned = toget;
2788             returnedrecs = *toget;
2789             resp->presentStatus = presst;
2790         }
2791         else
2792         {
2793             if (*resp->resultCount)
2794                 *next = 1;
2795             resp->numberOfRecordsReturned = nulint;
2796             resp->presentStatus = 0;
2797         }
2798         resp->nextResultSetPosition = next;
2799         resp->searchStatus = sr;
2800         resp->resultSetStatus = 0;
2801         if (bsrt->estimated_hit_count)
2802         {
2803             resp->resultSetStatus = odr_intdup(assoc->encode,
2804                                                Z_SearchResponse_estimate);
2805         }
2806         else if (bsrt->partial_resultset)
2807         {
2808             resp->resultSetStatus = odr_intdup(assoc->encode,
2809                                                Z_SearchResponse_subset);
2810         }
2811     }
2812     resp->additionalSearchInfo = bsrt->search_info;
2813
2814     if (log_request)
2815     {
2816         int i;
2817         WRBUF wr = wrbuf_alloc();
2818
2819         for (i = 0 ; i < req->num_databaseNames; i++)
2820         {
2821             if (i)
2822                 wrbuf_printf(wr, "+");
2823             wrbuf_puts(wr, req->databaseNames[i]);
2824         }
2825         wrbuf_printf(wr, " ");
2826
2827         if (bsrt->errcode)
2828             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2829         else
2830             wrbuf_printf(wr, "OK " ODR_INT_PRINTF, bsrt->hits);
2831         wrbuf_printf(wr, " %s 1+" ODR_INT_PRINTF " ",
2832                      req->resultSetName, returnedrecs);
2833         yaz_query_to_wrbuf(wr, req->query);
2834
2835         yaz_log(log_request, "Search %s", wrbuf_cstr(wr));
2836         wrbuf_destroy(wr);
2837     }
2838     return apdu;
2839 }
2840
2841 /*
2842  * Maybe we got a little over-friendly when we designed bend_fetch to
2843  * get only one record at a time. Some backends can optimise multiple-record
2844  * fetches, and at any rate, there is some overhead involved in
2845  * all that selecting and hopping around. Problem is, of course, that the
2846  * frontend can't know ahead of time how many records it'll need to
2847  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2848  * is downright lousy as a bulk data transfer protocol.
2849  *
2850  * To start with, we'll do the fetching of records from the backend
2851  * in one operation: To save some trips in and out of the event-handler,
2852  * and to simplify the interface to pack_records. At any rate, asynch
2853  * operation is more fun in operations that have an unpredictable execution
2854  * speed - which is normally more true for search than for present.
2855  */
2856 static Z_APDU *process_presentRequest(association *assoc, request *reqb)
2857 {
2858     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2859     Z_APDU *apdu;
2860     Z_PresentResponse *resp;
2861     Odr_int *next;
2862     Odr_int *num;
2863     int errcode = 0;
2864
2865     yaz_log(log_requestdetail, "Got PresentRequest.");
2866
2867     resp = (Z_PresentResponse *)odr_malloc(assoc->encode, sizeof(*resp));
2868     resp->records = 0;
2869     resp->presentStatus = odr_intdup(assoc->encode, 0);
2870     if (assoc->init->bend_present)
2871     {
2872         bend_present_rr *bprr = (bend_present_rr *)
2873             nmem_malloc(reqb->request_mem, sizeof(*bprr));
2874         bprr->setname = req->resultSetId;
2875         bprr->start = odr_int_to_int(*req->resultSetStartPoint);
2876         bprr->number = odr_int_to_int(*req->numberOfRecordsRequested);
2877         bprr->format = req->preferredRecordSyntax;
2878         bprr->comp = req->recordComposition;
2879         bprr->referenceId = req->referenceId;
2880         bprr->stream = assoc->encode;
2881         bprr->print = assoc->print;
2882         bprr->association = assoc;
2883         bprr->errcode = 0;
2884         bprr->errstring = NULL;
2885         (*assoc->init->bend_present)(assoc->backend, bprr);
2886
2887         if (bprr->errcode)
2888         {
2889             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2890             *resp->presentStatus = Z_PresentStatus_failure;
2891             errcode = bprr->errcode;
2892         }
2893     }
2894     apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2895     next = odr_intdup(assoc->encode, 0);
2896     num = odr_intdup(assoc->encode, 0);
2897
2898     apdu->which = Z_APDU_presentResponse;
2899     apdu->u.presentResponse = resp;
2900     resp->referenceId = req->referenceId;
2901     resp->otherInfo = 0;
2902
2903     if (!resp->records)
2904     {
2905         *num = *req->numberOfRecordsRequested;
2906         resp->records =
2907             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2908                          num, req->recordComposition, next,
2909                          resp->presentStatus,
2910                          req->referenceId, req->preferredRecordSyntax,
2911                          &errcode);
2912     }
2913     if (log_request)
2914     {
2915         WRBUF wr = wrbuf_alloc();
2916         wrbuf_printf(wr, "Present ");
2917
2918         if (*resp->presentStatus == Z_PresentStatus_failure)
2919             wrbuf_printf(wr, "ERROR %d ", errcode);
2920         else if (*resp->presentStatus == Z_PresentStatus_success)
2921             wrbuf_printf(wr, "OK -  ");
2922         else
2923             wrbuf_printf(wr, "Partial " ODR_INT_PRINTF " - ",
2924                          *resp->presentStatus);
2925
2926         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
2927                 req->resultSetId, *req->resultSetStartPoint,
2928                 *req->numberOfRecordsRequested);
2929         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
2930         wrbuf_destroy(wr);
2931     }
2932     if (!resp->records)
2933         return 0;
2934     resp->numberOfRecordsReturned = num;
2935     resp->nextResultSetPosition = next;
2936
2937     return apdu;
2938 }
2939
2940 /*
2941  * Scan was implemented rather in a hurry, and with support for only the basic
2942  * elements of the service in the backend API. Suggestions are welcome.
2943  */
2944 static Z_APDU *process_scanRequest(association *assoc, request *reqb)
2945 {
2946     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2947     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2948     Z_ScanResponse *res = (Z_ScanResponse *)
2949         odr_malloc(assoc->encode, sizeof(*res));
2950     Odr_int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2951     Odr_int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2952     Z_ListEntries *ents = (Z_ListEntries *)
2953         odr_malloc(assoc->encode, sizeof(*ents));
2954     Z_DiagRecs *diagrecs_p = NULL;
2955     bend_scan_rr *bsrr = (bend_scan_rr *)
2956         odr_malloc(assoc->encode, sizeof(*bsrr));
2957     struct scan_entry *save_entries;
2958     int step_size = 0;
2959
2960     yaz_log(log_requestdetail, "Got ScanRequest");
2961
2962     apdu->which = Z_APDU_scanResponse;
2963     apdu->u.scanResponse = res;
2964     res->referenceId = req->referenceId;
2965
2966     /* if step is absent, set it to 0 */
2967     if (req->stepSize)
2968         step_size = odr_int_to_int(*req->stepSize);
2969
2970     res->stepSize = 0;
2971     res->scanStatus = scanStatus;
2972     res->numberOfEntriesReturned = numberOfEntriesReturned;
2973     res->positionOfTerm = 0;
2974     res->entries = ents;
2975     ents->num_entries = 0;
2976     ents->entries = NULL;
2977     ents->num_nonsurrogateDiagnostics = 0;
2978     ents->nonsurrogateDiagnostics = NULL;
2979     res->attributeSet = 0;
2980     res->otherInfo = 0;
2981
2982     if (req->databaseNames)
2983     {
2984         int i;
2985         for (i = 0; i < req->num_databaseNames; i++)
2986             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2987     }
2988     bsrr->scanClause = 0;
2989     bsrr->errcode = 0;
2990     bsrr->errstring = 0;
2991     bsrr->num_bases = req->num_databaseNames;
2992     bsrr->basenames = req->databaseNames;
2993     bsrr->num_entries = odr_int_to_int(*req->numberOfTermsRequested);
2994     bsrr->term = req->termListAndStartPoint;
2995     bsrr->referenceId = req->referenceId;
2996     bsrr->stream = assoc->encode;
2997     bsrr->print = assoc->print;
2998     bsrr->step_size = &step_size;
2999     bsrr->setname = yaz_oi_get_string_oid(&req->otherInfo,
3000                                           yaz_oid_userinfo_scan_set, 1, 0);
3001     bsrr->entries = 0;
3002     /* For YAZ 2.0 and earlier it was the backend handler that
3003        initialized entries (member display_term did not exist)
3004        YAZ 2.0 and later sets 'entries'  and initialize all members
3005        including 'display_term'. If YAZ 2.0 or later sees that
3006        entries was modified - we assume that it is an old handler and
3007        that 'display_term' is _not_ set.
3008     */
3009     if (bsrr->num_entries > 0)
3010     {
3011         int i;
3012         bsrr->entries = (struct scan_entry *)
3013             odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3014                        bsrr->num_entries);
3015         for (i = 0; i<bsrr->num_entries; i++)
3016         {
3017             bsrr->entries[i].term = 0;
3018             bsrr->entries[i].occurrences = 0;
3019             bsrr->entries[i].errcode = 0;
3020             bsrr->entries[i].errstring = 0;
3021             bsrr->entries[i].display_term = 0;
3022         }
3023     }
3024     save_entries = bsrr->entries;  /* save it so we can compare later */
3025
3026     bsrr->attributeset = req->attributeSet;
3027     log_scan_term_level(log_requestdetail, req->termListAndStartPoint,
3028                         bsrr->attributeset);
3029     bsrr->term_position = req->preferredPositionInResponse ?
3030         odr_int_to_int(*req->preferredPositionInResponse) : 1;
3031
3032     ((int (*)(void *, bend_scan_rr *))
3033      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3034
3035     if (bsrr->errcode)
3036         diagrecs_p = zget_DiagRecs(assoc->encode,
3037                                    bsrr->errcode, bsrr->errstring);
3038     else
3039     {
3040         int i;
3041         Z_Entry **tab = (Z_Entry **)
3042             odr_malloc(assoc->encode, sizeof(*tab) * bsrr->num_entries);
3043
3044         if (bsrr->status == BEND_SCAN_PARTIAL)
3045             *scanStatus = Z_Scan_partial_5;
3046         else
3047             *scanStatus = Z_Scan_success;
3048         res->stepSize = odr_intdup(assoc->encode, step_size);
3049         ents->entries = tab;
3050         ents->num_entries = bsrr->num_entries;
3051         res->numberOfEntriesReturned = odr_intdup(assoc->encode,
3052                                                    ents->num_entries);
3053         res->positionOfTerm = odr_intdup(assoc->encode, bsrr->term_position);
3054         for (i = 0; i < bsrr->num_entries; i++)
3055         {
3056             Z_Entry *e;
3057             Z_TermInfo *t;
3058             Odr_oct *o;
3059
3060             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3061             if (bsrr->entries[i].occurrences >= 0)
3062             {
3063                 e->which = Z_Entry_termInfo;
3064                 e->u.termInfo = t = (Z_TermInfo *)
3065                     odr_malloc(assoc->encode, sizeof(*t));
3066                 t->suggestedAttributes = 0;
3067                 t->displayTerm = 0;
3068                 if (save_entries == bsrr->entries &&
3069                     bsrr->entries[i].display_term)
3070                 {
3071                     /* the entries was _not_ set by the handler. So it's
3072                        safe to test for new member display_term. It is
3073                        NULL'ed by us.
3074                     */
3075                     t->displayTerm = odr_strdup(assoc->encode,
3076                                                 bsrr->entries[i].display_term);
3077                 }
3078                 t->alternativeTerm = 0;
3079                 t->byAttributes = 0;
3080                 t->otherTermInfo = 0;
3081                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3082                 t->term = (Z_Term *)
3083                     odr_malloc(assoc->encode, sizeof(*t->term));
3084                 t->term->which = Z_Term_general;
3085                 t->term->u.general = o =
3086                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3087                 o->buf = (unsigned char *)
3088                     odr_malloc(assoc->encode, o->len = o->size =
3089                                strlen(bsrr->entries[i].term));
3090                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3091                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (" ODR_INT_PRINTF ")", i,
3092                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3093             }
3094             else
3095             {
3096                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3097                                                   bsrr->entries[i].errcode,
3098                                                   bsrr->entries[i].errstring);
3099                 assert(drecs->num_diagRecs == 1);
3100                 e->which = Z_Entry_surrogateDiagnostic;
3101                 assert(drecs->diagRecs[0]);
3102                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3103             }
3104         }
3105     }
3106     if (diagrecs_p)
3107     {
3108         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3109         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3110     }
3111     if (log_request)
3112     {
3113         int i;
3114         WRBUF wr = wrbuf_alloc();
3115         wrbuf_printf(wr, "Scan ");
3116         for (i = 0 ; i < req->num_databaseNames; i++)
3117         {
3118             if (i)
3119                 wrbuf_printf(wr, "+");
3120             wrbuf_puts(wr, req->databaseNames[i]);
3121         }
3122
3123         wrbuf_printf(wr, " ");
3124
3125         if (bsrr->errcode)
3126             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3127         else
3128             wrbuf_printf(wr, "OK");
3129
3130         wrbuf_printf(wr, " " ODR_INT_PRINTF " - " ODR_INT_PRINTF "+"
3131                      ODR_INT_PRINTF "+" ODR_INT_PRINTF,
3132                      res->numberOfEntriesReturned ?
3133                      *res->numberOfEntriesReturned : 0,
3134                      (req->preferredPositionInResponse ?
3135                       *req->preferredPositionInResponse : 1),
3136                      *req->numberOfTermsRequested,
3137                      (res->stepSize ? *res->stepSize : 1));
3138
3139         if (bsrr->setname)
3140             wrbuf_printf(wr, "+%s", bsrr->setname);
3141
3142         wrbuf_printf(wr, " ");
3143         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3144                           bsrr->attributeset);
3145         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3146         wrbuf_destroy(wr);
3147     }
3148     return apdu;
3149 }
3150
3151 static Z_APDU *process_sortRequest(association *assoc, request *reqb)
3152 {
3153     int i;
3154     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3155     Z_SortResponse *res = (Z_SortResponse *)
3156         odr_malloc(assoc->encode, sizeof(*res));
3157     bend_sort_rr *bsrr = (bend_sort_rr *)
3158         odr_malloc(assoc->encode, sizeof(*bsrr));
3159
3160     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3161
3162     yaz_log(log_requestdetail, "Got SortRequest.");
3163
3164     bsrr->num_input_setnames = req->num_inputResultSetNames;
3165     for (i=0;i<req->num_inputResultSetNames;i++)
3166         yaz_log(log_requestdetail, "Input resultset: '%s'",
3167                 req->inputResultSetNames[i]);
3168     bsrr->input_setnames = req->inputResultSetNames;
3169     bsrr->referenceId = req->referenceId;
3170     bsrr->output_setname = req->sortedResultSetName;
3171     yaz_log(log_requestdetail, "Output resultset: '%s'",
3172                 req->sortedResultSetName);
3173     bsrr->sort_sequence = req->sortSequence;
3174        /*FIXME - dump those sequences too */
3175     bsrr->stream = assoc->encode;
3176     bsrr->print = assoc->print;
3177
3178     bsrr->sort_status = Z_SortResponse_failure;
3179     bsrr->errcode = 0;
3180     bsrr->errstring = 0;
3181
3182     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3183
3184     res->referenceId = bsrr->referenceId;
3185     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3186     res->resultSetStatus = 0;
3187     if (bsrr->errcode)
3188     {
3189         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3190                                        bsrr->errcode, bsrr->errstring);
3191         res->diagnostics = dr->diagRecs;
3192         res->num_diagnostics = dr->num_diagRecs;
3193     }
3194     else
3195     {
3196         res->num_diagnostics = 0;
3197         res->diagnostics = 0;
3198     }
3199     res->resultCount = 0;
3200     res->otherInfo = 0;
3201
3202     apdu->which = Z_APDU_sortResponse;
3203     apdu->u.sortResponse = res;
3204     if (log_request)
3205     {
3206         WRBUF wr = wrbuf_alloc();
3207         wrbuf_printf(wr, "Sort ");
3208         if (bsrr->errcode)
3209             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3210         else
3211             wrbuf_printf(wr,  "OK -");
3212         wrbuf_printf(wr, " (");
3213         for (i = 0; i<req->num_inputResultSetNames; i++)
3214         {
3215             if (i)
3216                 wrbuf_printf(wr, "+");
3217             wrbuf_puts(wr, req->inputResultSetNames[i]);
3218         }
3219         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3220
3221         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3222         wrbuf_destroy(wr);
3223     }
3224     return apdu;
3225 }
3226
3227 static Z_APDU *process_deleteRequest(association *assoc, request *reqb)
3228 {
3229     int i;
3230     Z_DeleteResultSetRequest *req =
3231         reqb->apdu_request->u.deleteResultSetRequest;
3232     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3233         odr_malloc(assoc->encode, sizeof(*res));
3234     bend_delete_rr *bdrr = (bend_delete_rr *)
3235         odr_malloc(assoc->encode, sizeof(*bdrr));
3236     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3237
3238     yaz_log(log_requestdetail, "Got DeleteRequest.");
3239
3240     bdrr->num_setnames = req->num_resultSetList;
3241     bdrr->setnames = req->resultSetList;
3242     for (i = 0; i<req->num_resultSetList; i++)
3243         yaz_log(log_requestdetail, "resultset: '%s'",
3244                 req->resultSetList[i]);
3245     bdrr->stream = assoc->encode;
3246     bdrr->print = assoc->print;
3247     bdrr->function = odr_int_to_int(*req->deleteFunction);
3248     bdrr->referenceId = req->referenceId;
3249     bdrr->statuses = 0;
3250     if (bdrr->num_setnames > 0)
3251     {
3252         bdrr->statuses = (int*)
3253             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3254                        bdrr->num_setnames);
3255         for (i = 0; i < bdrr->num_setnames; i++)
3256             bdrr->statuses[i] = 0;
3257     }
3258     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3259
3260     res->referenceId = req->referenceId;
3261
3262     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3263
3264     res->deleteListStatuses = 0;
3265     if (bdrr->num_setnames > 0)
3266     {
3267         int i;
3268         res->deleteListStatuses = (Z_ListStatuses *)
3269             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3270         res->deleteListStatuses->num = bdrr->num_setnames;
3271         res->deleteListStatuses->elements =
3272             (Z_ListStatus **)
3273             odr_malloc(assoc->encode,
3274                         sizeof(*res->deleteListStatuses->elements) *
3275                         bdrr->num_setnames);
3276         for (i = 0; i<bdrr->num_setnames; i++)
3277         {
3278             res->deleteListStatuses->elements[i] =
3279                 (Z_ListStatus *)
3280                 odr_malloc(assoc->encode,
3281                             sizeof(**res->deleteListStatuses->elements));
3282             res->deleteListStatuses->elements[i]->status =
3283                 odr_intdup(assoc->encode, bdrr->statuses[i]);
3284             res->deleteListStatuses->elements[i]->id =
3285                 odr_strdup(assoc->encode, bdrr->setnames[i]);
3286         }
3287     }
3288     res->numberNotDeleted = 0;
3289     res->bulkStatuses = 0;
3290     res->deleteMessage = 0;
3291     res->otherInfo = 0;
3292
3293     apdu->which = Z_APDU_deleteResultSetResponse;
3294     apdu->u.deleteResultSetResponse = res;
3295     if (log_request)
3296     {
3297         WRBUF wr = wrbuf_alloc();
3298         wrbuf_printf(wr, "Delete ");
3299         if (bdrr->delete_status)
3300             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3301         else
3302             wrbuf_printf(wr, "OK -");
3303         for (i = 0; i<req->num_resultSetList; i++)
3304             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3305         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3306         wrbuf_destroy(wr);
3307     }
3308     return apdu;
3309 }
3310
3311 static void process_close(association *assoc, request *reqb)
3312 {
3313     Z_Close *req = reqb->apdu_request->u.close;
3314     static char *reasons[] =
3315     {
3316         "finished",
3317         "shutdown",
3318         "systemProblem",
3319         "costLimit",
3320         "resources",
3321         "securityViolation",
3322         "protocolError",
3323         "lackOfActivity",
3324         "peerAbort",
3325         "unspecified"
3326     };
3327
3328     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3329         reasons[*req->closeReason], req->diagnosticInformation ?
3330         req->diagnosticInformation : "NULL");
3331     if (assoc->version < 3) /* to make do_force respond with close */
3332         assoc->version = 3;
3333     do_close_req(assoc, Z_Close_finished,
3334                  "Association terminated by client", reqb);
3335     yaz_log(log_request,"Close OK");
3336 }
3337
3338 static Z_APDU *process_segmentRequest(association *assoc, request *reqb)
3339 {
3340     bend_segment_rr req;
3341
3342     req.segment = reqb->apdu_request->u.segmentRequest;
3343     req.stream = assoc->encode;
3344     req.decode = assoc->decode;
3345     req.print = assoc->print;
3346     req.association = assoc;
3347
3348     (*assoc->init->bend_segment)(assoc->backend, &req);
3349
3350     return 0;
3351 }
3352
3353 static Z_APDU *process_ESRequest(association *assoc, request *reqb)
3354 {
3355     bend_esrequest_rr esrequest;
3356     const char *ext_name = "unknown";
3357
3358     Z_ExtendedServicesRequest *req =
3359         reqb->apdu_request->u.extendedServicesRequest;
3360     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3361
3362     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3363
3364     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3365     esrequest.stream = assoc->encode;
3366     esrequest.decode = assoc->decode;
3367     esrequest.print = assoc->print;
3368     esrequest.errcode = 0;
3369     esrequest.errstring = NULL;
3370     esrequest.association = assoc;
3371     esrequest.taskPackage = 0;
3372     esrequest.referenceId = req->referenceId;
3373
3374     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3375     {
3376         switch(esrequest.esr->taskSpecificParameters->which)
3377         {
3378         case Z_External_itemOrder:
3379             ext_name = "ItemOrder"; break;
3380         case Z_External_update:
3381             ext_name = "Update"; break;
3382         case Z_External_update0:
3383             ext_name = "Update0"; break;
3384         case Z_External_ESAdmin:
3385             ext_name = "Admin"; break;
3386
3387         }
3388     }
3389
3390     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3391
3392     resp->referenceId = req->referenceId;
3393
3394     if (esrequest.errcode == -1)
3395     {
3396         /* Backend service indicates request will be processed */
3397         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3398         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3399     }
3400     else if (esrequest.errcode == 0)
3401     {
3402         /* Backend service indicates request will be processed */
3403         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3404         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3405     }
3406     else
3407     {
3408         Z_DiagRecs *diagRecs =
3409             zget_DiagRecs(assoc->encode, esrequest.errcode,
3410                           esrequest.errstring);
3411         /* Backend indicates error, request will not be processed */
3412         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3413         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3414         resp->num_diagnostics = diagRecs->num_diagRecs;
3415         resp->diagnostics = diagRecs->diagRecs;
3416         if (log_request)
3417         {
3418             WRBUF wr = wrbuf_alloc();
3419             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3420             yaz_log(log_request, "EsRequest %s", wrbuf_cstr(wr) );
3421             wrbuf_destroy(wr);
3422         }
3423
3424     }
3425     /* Do something with the members of bend_extendedservice */
3426     if (esrequest.taskPackage)
3427     {
3428         resp->taskPackage = z_ext_record_oid(
3429             assoc->encode, yaz_oid_recsyn_extended,
3430             (const char *)  esrequest.taskPackage, -1);
3431     }
3432     yaz_log(YLOG_DEBUG,"Send the result apdu");
3433     return apdu;
3434 }
3435
3436 int bend_assoc_is_alive(bend_association assoc)
3437 {
3438     if (assoc->state == ASSOC_DEAD)
3439         return 0; /* already marked as dead. Don't check I/O chan anymore */
3440
3441     return iochan_is_alive(assoc->client_chan);
3442 }
3443
3444
3445 /*
3446  * Local variables:
3447  * c-basic-offset: 4
3448  * c-file-style: "Stroustrup"
3449  * indent-tabs-mode: nil
3450  * End:
3451  * vim: shiftwidth=4 tabstop=8 expandtab
3452  */
3453