src/seshigh.c

   1 /* This file is part of the YAZ toolkit.
   2  * Copyright (C) 1995-2013 Index Data
   3  * See the file LICENSE for details.
   4  */
   5 /**
   6  * \file seshigh.c
   7  * \brief Implements GFS session logic.
   8  *
   9  * Frontend server logic.
  10  *
  11  * This code receives incoming APDUs, and handles client requests by means
  12  * of the backend API.
  13  *
  14  * Some of the code is getting quite involved, compared to simpler servers -
  15  * primarily because it is asynchronous both in the communication with
  16  * the user and the backend. We think the complexity will pay off in
  17  * the form of greater flexibility when more asynchronous facilities
  18  * are implemented.
  19  *
  20  * Memory management has become somewhat involved. In the simple case, where
  21  * only one PDU is pending at a time, it will simply reuse the same memory,
  22  * once it has found its working size. When we enable multiple concurrent
  23  * operations, perhaps even with multiple parallel calls to the backend, it
  24  * will maintain a pool of buffers for encoding and decoding, trying to
  25  * minimize memory allocation/deallocation during normal operation.
  26  *
  27  */
  28 #if HAVE_CONFIG_H
  29 #include <config.h>
  30 #endif
  31
  32 #include <limits.h>
  33 #include <stdlib.h>
  34 #include <stdio.h>
  35 #include <assert.h>
  36
  37 #if HAVE_SYS_TYPES_H
  38 #include <sys/types.h>
  39 #endif
  40 #if HAVE_SYS_STAT_H
  41 #include <sys/stat.h>
  42 #endif
  43
  44 #ifdef WIN32
  45 #include <io.h>
  46 #define S_ISREG(x) (x & _S_IFREG)
  47 #include <process.h>
  48 #endif
  49
  50 #if HAVE_UNISTD_H
  51 #include <unistd.h>
  52 #endif
  53
  54 #if YAZ_HAVE_XML2
  55 #include <libxml/parser.h>
  56 #include <libxml/tree.h>
  57 #endif
  58
  59 #include <yaz/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         /* We aren't speaking to this fellow */
 274         if (assoc->state == ASSOC_DEAD)
 275         {
 276             yaz_log(log_session, "Connection closed - end of session");
 277             cs_close(conn);
 278             destroy_association(assoc);
 279             iochan_destroy(h);
 280             return 0;
 281         }
 282         assoc->cs_get_mask = EVENT_INPUT;
 283
 284         do
 285         {
 286             int res = cs_get(conn, &assoc->input_buffer,
 287                              &assoc->input_buffer_len);
 288             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 289             {
 290                 yaz_log(log_session, "Connection error: %s res=%d",
 291                         cs_errmsg(cs_errno(conn)), res);
 292                 req = request_get(&assoc->incoming); /* get a new request */
 293                 do_close_req(assoc, Z_Close_protocolError,
 294                              "Incoming package too large", req);
 295                 return 0;
 296             }
 297             else if (res <= 0)
 298             {
 299                 assoc->state = ASSOC_DEAD;
 300                 yaz_log(log_session, "Connection closed by client");
 301                 return 0;
 302             }
 303             else if (res == 1) /* incomplete read - wait for more  */
 304             {
 305                 if (conn->io_pending & CS_WANT_WRITE)
 306                     assoc->cs_get_mask |= EVENT_OUTPUT;
 307                 iochan_setflag(h, assoc->cs_get_mask);
 308                 return 0;
 309             }
 310             /* we got a complete PDU. Let's decode it */
 311             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 312                     assoc->input_buffer[0] & 0xff,
 313                     assoc->input_buffer[1] & 0xff,
 314                     assoc->input_buffer[2] & 0xff);
 315             req = request_get(&assoc->incoming); /* get a new request */
 316             odr_reset(assoc->decode);
 317             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 318             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 319             {
 320                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 321                         "[near byte %ld] ",
 322                         odr_errmsg(odr_geterror(assoc->decode)),
 323                         odr_getelement(assoc->decode),
 324                         (long) odr_offset(assoc->decode));
 325                 if (assoc->decode->error != OHTTP)
 326                 {
 327                     yaz_log(YLOG_WARN, "PDU dump:");
 328                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 329                     request_release(req);
 330                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 331                 }
 332                 else
 333                 {
 334                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 335                     assoc->state = ASSOC_DEAD;
 336                     process_gdu_response(assoc, req, p);
 337                 }
 338                 return 0;
 339             }
 340             req->request_mem = odr_extract_mem(assoc->decode);
 341             if (assoc->print)
 342             {
 343                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 344                     yaz_log(YLOG_WARN, "ODR print error: %s",
 345                             odr_errmsg(odr_geterror(assoc->print)));
 346                 odr_reset(assoc->print);
 347             }
 348             request_enq(&assoc->incoming, req);
 349         }
 350         while (cs_more(conn));
 351     }
 352     return 1;
 353 }
 354
 355 /*
 356  * This is where PDUs from the client are read and the further
 357  * processing is initiated. Flow of control moves down through the
 358  * various process_* functions below, until the encoded result comes back up
 359  * to the output handler in here.
 360  *
 361  *  h     : the I/O channel that has an outstanding event.
 362  *  event : the current outstanding event.
 363  */
 364 void ir_session(IOCHAN h, int event)
 365 {
 366     int res;
 367     association *assoc = (association *)iochan_getdata(h);
 368     COMSTACK conn = assoc->client_link;
 369     request *req;
 370
 371     assert(h && conn && assoc);
 372     if (event == EVENT_TIMEOUT)
 373     {
 374         if (assoc->state != ASSOC_UP)
 375         {
 376             yaz_log(log_session, "Timeout. Closing connection");
 377             /* do we need to lod this at all */
 378             cs_close(conn);
 379             destroy_association(assoc);
 380             iochan_destroy(h);
 381         }
 382         else
 383         {
 384             yaz_log(log_sessiondetail, "Timeout. Sending Z39.50 Close");
 385             do_close(assoc, Z_Close_lackOfActivity, 0);
 386         }
 387         return;
 388     }
 389     if (event & assoc->cs_accept_mask)
 390     {
 391         if (!cs_accept(conn))
 392         {
 393             yaz_log(YLOG_WARN, "accept failed");
 394             destroy_association(assoc);
 395             iochan_destroy(h);
 396             return;
 397         }
 398         iochan_clearflag(h, EVENT_OUTPUT);
 399         if (conn->io_pending)
 400         {   /* cs_accept didn't complete */
 401             assoc->cs_accept_mask =
 402                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 403                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 404
 405             iochan_setflag(h, assoc->cs_accept_mask);
 406         }
 407         else
 408         {   /* cs_accept completed. Prepare for reading (cs_get) */
 409             assoc->cs_accept_mask = 0;
 410             assoc->cs_get_mask = EVENT_INPUT;
 411             iochan_setflag(h, assoc->cs_get_mask);
 412         }
 413         return;
 414     }
 415     if (event & assoc->cs_get_mask) /* input */
 416     {
 417         if (!ir_read(h, event))
 418             return;
 419         req = request_head(&assoc->incoming);
 420         if (req->state == REQUEST_IDLE)
 421         {
 422             request_deq(&assoc->incoming);
 423             process_gdu_request(assoc, req);
 424         }
 425     }
 426     if (event & assoc->cs_put_mask)
 427     {
 428         request *req = request_head(&assoc->outgoing);
 429
 430         assoc->cs_put_mask = 0;
 431         yaz_log(YLOG_DEBUG, "ir_session (output)");
 432         req->state = REQUEST_PENDING;
 433         switch (res = cs_put(conn, req->response, req->len_response))
 434         {
 435         case -1:
 436             yaz_log(log_sessiondetail, "Connection closed by client");
 437             cs_close(conn);
 438             destroy_association(assoc);
 439             iochan_destroy(h);
 440             break;
 441         case 0: /* all sent - release the request structure */
 442             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 443 #if 0
 444             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 445                     req->response);
 446 #endif
 447             request_deq(&assoc->outgoing);
 448             request_release(req);
 449             if (!request_head(&assoc->outgoing))
 450             {   /* restore mask for cs_get operation ... */
 451                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 452                 iochan_setflag(h, assoc->cs_get_mask);
 453                 if (assoc->state == ASSOC_DEAD)
 454                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 455             }
 456             else
 457             {
 458                 assoc->cs_put_mask = EVENT_OUTPUT;
 459             }
 460             break;
 461         default:
 462             if (conn->io_pending & CS_WANT_WRITE)
 463                 assoc->cs_put_mask |= EVENT_OUTPUT;
 464             if (conn->io_pending & CS_WANT_READ)
 465                 assoc->cs_put_mask |= EVENT_INPUT;
 466             iochan_setflag(h, assoc->cs_put_mask);
 467         }
 468     }
 469     if (event & EVENT_EXCEPT)
 470     {
 471         yaz_log(YLOG_WARN, "ir_session (exception)");
 472         cs_close(conn);
 473         destroy_association(assoc);
 474         iochan_destroy(h);
 475     }
 476 }
 477
 478 static int process_z_request(association *assoc, request *req, char **msg);
 479
 480
 481 static void assoc_init_reset(association *assoc)
 482 {
 483     xfree(assoc->init);
 484     assoc->init = (bend_initrequest *) xmalloc(sizeof(*assoc->init));
 485
 486     assoc->init->stream = assoc->encode;
 487     assoc->init->print = assoc->print;
 488     assoc->init->auth = 0;
 489     assoc->init->referenceId = 0;
 490     assoc->init->implementation_version = 0;
 491     assoc->init->implementation_id = 0;
 492     assoc->init->implementation_name = 0;
 493     assoc->init->query_charset = 0;
 494     assoc->init->records_in_same_charset = 0;
 495     assoc->init->bend_sort = NULL;
 496     assoc->init->bend_search = NULL;
 497     assoc->init->bend_present = NULL;
 498     assoc->init->bend_esrequest = NULL;
 499     assoc->init->bend_delete = NULL;
 500     assoc->init->bend_scan = NULL;
 501     assoc->init->bend_segment = NULL;
 502     assoc->init->bend_fetch = NULL;
 503     assoc->init->bend_explain = NULL;
 504     assoc->init->bend_srw_scan = NULL;
 505     assoc->init->bend_srw_update = NULL;
 506     assoc->init->named_result_sets = 0;
 507
 508     assoc->init->charneg_request = NULL;
 509     assoc->init->charneg_response = NULL;
 510
 511     assoc->init->decode = assoc->decode;
 512     assoc->init->peer_name =
 513         odr_strdup(assoc->encode, cs_addrstr(assoc->client_link));
 514
 515     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 516 }
 517
 518 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 519 {
 520     statserv_options_block *cb = statserv_getcontrol();
 521     if (!assoc->init)
 522     {
 523         const char *encoding = "UTF-8";
 524         Z_External *ce;
 525         bend_initresult *binitres;
 526
 527         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 528         assoc_init_reset(assoc);
 529
 530         if (sr->username)
 531         {
 532             Z_IdAuthentication *auth = (Z_IdAuthentication *)
 533                 odr_malloc(assoc->decode, sizeof(*auth));
 534             size_t len;
 535
 536             len = strlen(sr->username) + 1;
 537             if (sr->password)
 538                 len += strlen(sr->password) + 2;
 539             yaz_log(log_requestdetail, "username=%s password-len=%ld",
 540                     sr->username, (long)
 541                     (sr->password ? strlen(sr->password) : 0));
 542             auth->which = Z_IdAuthentication_open;
 543             auth->u.open = (char *) odr_malloc(assoc->decode, len);
 544             strcpy(auth->u.open, sr->username);
 545             if (sr->password && *sr->password)
 546             {
 547                 strcat(auth->u.open, "/");
 548                 strcat(auth->u.open, sr->password);
 549             }
 550             assoc->init->auth = auth;
 551         }
 552
 553 #if 1
 554         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 555         assoc->init->charneg_request = ce->u.charNeg3;
 556 #endif
 557         assoc->backend = 0;
 558         if (!(binitres = (*cb->bend_init)(assoc->init)))
 559         {
 560             assoc->state = ASSOC_DEAD;
 561             yaz_add_srw_diagnostic(assoc->encode, d, num,
 562                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 563             return 0;
 564         }
 565         assoc->backend = binitres->handle;
 566         assoc->init->auth = 0;
 567         if (binitres->errcode)
 568         {
 569             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 570             assoc->state = ASSOC_DEAD;
 571             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 572                                    binitres->errstring);
 573             return 0;
 574         }
 575         return 1;
 576     }
 577     return 1;
 578 }
 579
 580 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 581 {
 582 #if YAZ_HAVE_XML2
 583     yaz_record_conv_t rc = 0;
 584     const char *match_schema = 0;
 585     Odr_oid *match_syntax = 0;
 586
 587     if (assoc->server)
 588     {
 589         int r;
 590         const char *input_schema = yaz_get_esn(rr->comp);
 591         Odr_oid *input_syntax_raw = rr->request_format;
 592
 593         const char *backend_schema = 0;
 594         Odr_oid *backend_syntax = 0;
 595
 596         r = yaz_retrieval_request(assoc->server->retrieval,
 597                                   input_schema,
 598                                   input_syntax_raw,
 599                                   &match_schema,
 600                                   &match_syntax,
 601                                   &rc,
 602                                   &backend_schema,
 603                                   &backend_syntax);
 604         if (r == -1) /* error ? */
 605         {
 606             const char *details = yaz_retrieval_get_error(
 607                 assoc->server->retrieval);
 608
 609             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 610             if (details)
 611                 rr->errstring = odr_strdup(rr->stream, details);
 612             return -1;
 613         }
 614         else if (r == 1 || r == 3)
 615         {
 616             const char *details = input_schema;
 617             rr->errcode =
 618                 YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
 619             if (details)
 620                 rr->errstring = odr_strdup(rr->stream, details);
 621             return -1;
 622         }
 623         else if (r == 2)
 624         {
 625             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 626             if (input_syntax_raw)
 627             {
 628                 char oidbuf[OID_STR_MAX];
 629                 oid_oid_to_dotstring(input_syntax_raw, oidbuf);
 630                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 631             }
 632             return -1;
 633         }
 634         if (backend_schema)
 635         {
 636             yaz_set_esn(&rr->comp, backend_schema, odr_getmem(rr->stream));
 637         }
 638         if (backend_syntax)
 639             rr->request_format = backend_syntax;
 640     }
 641     (*assoc->init->bend_fetch)(assoc->backend, rr);
 642     if (rc && rr->record && rr->errcode == 0)
 643     {   /* post conversion must take place .. */
 644         WRBUF output_record = wrbuf_alloc();
 645         int r = 1;
 646         const char *details = 0;
 647         if (rr->len > 0)
 648         {
 649             r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 650             if (r)
 651                 details = yaz_record_conv_get_error(rc);
 652         }
 653         else if (rr->len == -1 && rr->output_format &&
 654                  !oid_oidcmp(rr->output_format, yaz_oid_recsyn_opac))
 655         {
 656             r = yaz_record_conv_opac_record(
 657                 rc, (Z_OPACRecord *) rr->record, output_record);
 658             if (r)
 659                 details = yaz_record_conv_get_error(rc);
 660         }
 661         if (r == 0 && match_syntax &&
 662             !oid_oidcmp(match_syntax, yaz_oid_recsyn_opac))
 663         {
 664             yaz_marc_t mt = yaz_marc_create();
 665             Z_OPACRecord *opac = 0;
 666             if (yaz_xml_to_opac(mt, wrbuf_buf(output_record),
 667                                 wrbuf_len(output_record),
 668                                 &opac, 0 /* iconv */, rr->stream->mem, 0)
 669                 && opac)
 670             {
 671                 rr->len = -1;
 672                 rr->record = (char *) opac;
 673             }
 674             else
 675             {
 676                 details = "XML to OPAC conversion failed";
 677                 r = 1;
 678             }
 679             yaz_marc_destroy(mt);
 680         }
 681         else if (r == 0)
 682         {
 683             rr->len = wrbuf_len(output_record);
 684             rr->record = (char *) odr_malloc(rr->stream, rr->len);
 685             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 686         }
 687         if (r)
 688         {
 689             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 690             if (details)
 691                 rr->errstring = odr_strdup(rr->stream, details);
 692         }
 693         wrbuf_destroy(output_record);
 694     }
 695     if (match_syntax)
 696         rr->output_format = match_syntax;
 697     if (match_schema)
 698         rr->schema = odr_strdup(rr->stream, match_schema);
 699 #else
 700     (*assoc->init->bend_fetch)(assoc->backend, rr);
 701 #endif
 702     return 0;
 703 }
 704
 705 static int srw_bend_fetch(association *assoc, int pos,
 706                           Z_SRW_searchRetrieveRequest *srw_req,
 707                           Z_SRW_record *record,
 708                           const char **addinfo, int *last_in_set)
 709 {
 710     bend_fetch_rr rr;
 711     ODR o = assoc->encode;
 712
 713     rr.setname = "default";
 714     rr.number = pos;
 715     rr.referenceId = 0;
 716     rr.request_format = odr_oiddup(assoc->decode, yaz_oid_recsyn_xml);
 717
 718     rr.comp = (Z_RecordComposition *)
 719             odr_malloc(assoc->decode, sizeof(*rr.comp));
 720     rr.comp->which = Z_RecordComp_complex;
 721     rr.comp->u.complex = (Z_CompSpec *)
 722             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 723     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 724         odr_malloc(assoc->encode, sizeof(bool_t));
 725     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 726     rr.comp->u.complex->num_dbSpecific = 0;
 727     rr.comp->u.complex->dbSpecific = 0;
 728     rr.comp->u.complex->num_recordSyntax = 0;
 729     rr.comp->u.complex->recordSyntax = 0;
 730
 731     rr.comp->u.complex->generic = (Z_Specification *)
 732             odr_malloc(assoc->decode, sizeof(Z_Specification));
 733
 734     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 735     rr.comp->u.complex->generic->which = Z_Schema_uri;
 736     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 737
 738     /* ESN = recordSchema if recordSchema is present */
 739     rr.comp->u.complex->generic->elementSpec = 0;
 740     if (srw_req->recordSchema)
 741     {
 742         rr.comp->u.complex->generic->elementSpec =
 743             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 744         rr.comp->u.complex->generic->elementSpec->which =
 745             Z_ElementSpec_elementSetName;
 746         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 747             srw_req->recordSchema;
 748     }
 749
 750     rr.stream = assoc->encode;
 751     rr.print = assoc->print;
 752
 753     rr.basename = 0;
 754     rr.len = 0;
 755     rr.record = 0;
 756     rr.last_in_set = 0;
 757     rr.errcode = 0;
 758     rr.errstring = 0;
 759     rr.surrogate_flag = 0;
 760     rr.schema = srw_req->recordSchema;
 761
 762     if (!assoc->init->bend_fetch)
 763         return 1;
 764
 765     retrieve_fetch(assoc, &rr);
 766
 767     *last_in_set = rr.last_in_set;
 768
 769     if (rr.errcode && rr.surrogate_flag)
 770     {
 771         int code = yaz_diag_bib1_to_srw(rr.errcode);
 772         yaz_mk_sru_surrogate(o, record, pos, code, rr.errstring);
 773         return 0;
 774     }
 775     else if (rr.len >= 0)
 776     {
 777         record->recordData_buf = rr.record;
 778         record->recordData_len = rr.len;
 779         record->recordPosition = odr_intdup(o, pos);
 780         record->recordSchema = odr_strdup_null(
 781             o, rr.schema ? rr.schema : srw_req->recordSchema);
 782     }
 783     if (rr.errcode)
 784     {
 785         *addinfo = rr.errstring;
 786         return rr.errcode;
 787     }
 788     return 0;
 789 }
 790
 791 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 792                    Z_Query *query_result, char **sortkeys_p)
 793 {
 794     /* have a CQL query and  CQL to PQF transform .. */
 795     CQL_parser cp = cql_parser_create();
 796     int r;
 797     int srw_errcode = 0;
 798     const char *add = 0;
 799     WRBUF rpn_buf = wrbuf_alloc();
 800
 801     *sortkeys_p = 0;
 802     r = cql_parser_string(cp, cql);
 803     if (r)
 804     {
 805         srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 806     }
 807     if (!r)
 808     {
 809         struct cql_node *cn = cql_parser_result(cp);
 810
 811         /* Syntax OK */
 812         r = cql_transform(ct, cn, wrbuf_vp_puts, rpn_buf);
 813         if (r)
 814             srw_errcode = cql_transform_error(ct, &add);
 815         else
 816         {
 817             char out[100];
 818             int r = cql_sortby_to_sortkeys_buf(cn, out, sizeof(out)-1);
 819
 820             if (r == 0)
 821             {
 822                 if (*out)
 823                     yaz_log(log_requestdetail, "srw_sortKeys '%s'", out);
 824                 *sortkeys_p = odr_strdup(odr, out);
 825             }
 826             else
 827             {
 828                 yaz_log(log_requestdetail, "failed to create srw_sortKeys");
 829                 srw_errcode = YAZ_SRW_UNSUPP_SORT_TYPE;
 830             }
 831         }
 832     }
 833     if (!r)
 834     {
 835         /* Syntax & transform OK. */
 836         /* Convert PQF string to Z39.50 to RPN query struct */
 837         YAZ_PQF_Parser pp = yaz_pqf_create();
 838         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, wrbuf_cstr(rpn_buf));
 839         if (!rpnquery)
 840         {
 841             size_t off;
 842             const char *pqf_msg;
 843             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 844             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 845                     pqf_msg, code);
 846             srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 847         }
 848         else
 849         {
 850             query_result->which = Z_Query_type_1;
 851             query_result->u.type_1 = rpnquery;
 852         }
 853         yaz_pqf_destroy(pp);
 854     }
 855     cql_parser_destroy(cp);
 856     wrbuf_destroy(rpn_buf);
 857     return srw_errcode;
 858 }
 859
 860 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 861                         Z_AttributesPlusTerm *result)
 862 {
 863     Z_Query query;
 864     Z_RPNQuery *rpn;
 865     char *sortkeys = 0;
 866     int srw_error = cql2pqf(odr, cql, ct, &query, &sortkeys);
 867     if (srw_error)
 868         return srw_error;
 869     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 870         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* bad query type */
 871     rpn = query.u.type_1;
 872     if (!rpn->RPNStructure)
 873         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be structure */
 874     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 875         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be simple */
 876     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 877         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be be attributes + term */
 878     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 879            sizeof(*result));
 880     return 0;
 881 }
 882
 883
 884 static int ccl2pqf(ODR odr, const Odr_oct *ccl, CCL_bibset bibset,
 885                    bend_search_rr *bsrr)
 886 {
 887     char *ccl0;
 888     struct ccl_rpn_node *node;
 889     int errcode, pos;
 890
 891     ccl0 = odr_strdupn(odr, (char*) ccl->buf, ccl->len);
 892     if ((node = ccl_find_str(bibset, ccl0, &errcode, &pos)) == 0)
 893     {
 894         bsrr->errstring = (char*) ccl_err_msg(errcode);
 895         return YAZ_SRW_QUERY_SYNTAX_ERROR;    /* Query syntax error */
 896     }
 897
 898     bsrr->query->which = Z_Query_type_1;
 899     bsrr->query->u.type_1 = ccl_rpn_query(odr, node);
 900     return 0;
 901 }
 902
 903 static void srw_bend_search(association *assoc,
 904                             Z_SRW_PDU *sr,
 905                             Z_SRW_PDU *res,
 906                             int *http_code)
 907 {
 908     Z_SRW_searchRetrieveResponse *srw_res = res->u.response;
 909     int srw_error = 0;
 910     Z_External *ext;
 911     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 912
 913     *http_code = 200;
 914     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 915     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 916     if (srw_res->num_diagnostics == 0 && assoc->init)
 917     {
 918         bend_search_rr rr;
 919         rr.setname = "default";
 920         rr.replace_set = 1;
 921         rr.num_bases = 1;
 922         rr.basenames = &srw_req->database;
 923         rr.referenceId = 0;
 924         rr.srw_sortKeys = 0;
 925         rr.srw_setname = 0;
 926         rr.srw_setnameIdleTime = 0;
 927         rr.estimated_hit_count = 0;
 928         rr.partial_resultset = 0;
 929         rr.query = (Z_Query *) odr_malloc(assoc->decode, sizeof(*rr.query));
 930         rr.query->u.type_1 = 0;
 931         rr.extra_args = sr->extra_args;
 932         rr.extra_response_data = 0;
 933         rr.present_number = srw_req->maximumRecords ?
 934             *srw_req->maximumRecords : 0;
 935
 936         if (srw_req->query_type == Z_SRW_query_type_cql)
 937         {
 938             if (assoc->server && assoc->server->cql_transform)
 939             {
 940                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 941                                           assoc->server->cql_transform,
 942                                           rr.query,
 943                                           &rr.srw_sortKeys);
 944
 945                 if (srw_errcode)
 946                 {
 947                     yaz_add_srw_diagnostic(assoc->encode,
 948                                            &srw_res->diagnostics,
 949                                            &srw_res->num_diagnostics,
 950                                            srw_errcode, 0);
 951                 }
 952             }
 953             else
 954             {
 955                 /* CQL query to backend. Wrap it - Z39.50 style */
 956                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 957                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 958                                                         "1.2.840.10003.16.2");
 959                 ext->indirect_reference = 0;
 960                 ext->descriptor = 0;
 961                 ext->which = Z_External_CQL;
 962                 ext->u.cql = srw_req->query.cql;
 963
 964                 rr.query->which = Z_Query_type_104;
 965                 rr.query->u.type_104 =  ext;
 966             }
 967         }
 968         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 969         {
 970             Z_RPNQuery *RPNquery;
 971             YAZ_PQF_Parser pqf_parser;
 972
 973             pqf_parser = yaz_pqf_create();
 974
 975             RPNquery = yaz_pqf_parse(pqf_parser, assoc->decode,
 976                                      srw_req->query.pqf);
 977             if (!RPNquery)
 978             {
 979                 const char *pqf_msg;
 980                 size_t off;
 981                 int code = yaz_pqf_error(pqf_parser, &pqf_msg, &off);
 982                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 983                         code, pqf_msg, (long) off);
 984                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 985             }
 986
 987             rr.query->which = Z_Query_type_1;
 988             rr.query->u.type_1 =  RPNquery;
 989
 990             yaz_pqf_destroy(pqf_parser);
 991         }
 992         else
 993         {
 994             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 995                                    &srw_res->num_diagnostics,
 996                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 997         }
 998         if (rr.query->u.type_1)
 999         {
1000             rr.stream = assoc->encode;
1001             rr.decode = assoc->decode;
1002             rr.print = assoc->print;
1003             if (srw_req->sort.sortKeys)
1004                 rr.srw_sortKeys = odr_strdup(assoc->encode,
1005                                              srw_req->sort.sortKeys);
1006             rr.association = assoc;
1007             rr.hits = 0;
1008             rr.errcode = 0;
1009             rr.errstring = 0;
1010             rr.search_info = 0;
1011             rr.search_input = 0;
1012             yaz_log_zquery_level(log_requestdetail,rr.query);
1013
1014             (assoc->init->bend_search)(assoc->backend, &rr);
1015             if (rr.errcode)
1016             {
1017                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1018                 {
1019                     *http_code = 404;
1020                 }
1021                 else
1022                 {
1023                     srw_error = yaz_diag_bib1_to_srw(rr.errcode);
1024                     yaz_add_srw_diagnostic(assoc->encode,
1025                                            &srw_res->diagnostics,
1026                                            &srw_res->num_diagnostics,
1027                                            srw_error, rr.errstring);
1028                 }
1029             }
1030             else
1031             {
1032                 int number = srw_req->maximumRecords ?
1033                     odr_int_to_int(*srw_req->maximumRecords) : 0;
1034                 int start = srw_req->startRecord ?
1035                     odr_int_to_int(*srw_req->startRecord) : 1;
1036
1037                 yaz_log(log_requestdetail, "Request to pack %d+%d out of "
1038                         ODR_INT_PRINTF,
1039                         start, number, rr.hits);
1040
1041                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
1042                 if (rr.srw_setname)
1043                 {
1044                     srw_res->resultSetId =
1045                         odr_strdup(assoc->encode, rr.srw_setname );
1046                     srw_res->resultSetIdleTime =
1047                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
1048                 }
1049
1050                 if (start > rr.hits || start < 1)
1051                 {
1052                     /* if hits<=0 and start=1 we don't return a diagnostic */
1053                     if (start != 1)
1054                         yaz_add_srw_diagnostic(
1055                             assoc->encode,
1056                             &srw_res->diagnostics, &srw_res->num_diagnostics,
1057                             YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1058                 }
1059                 else if (number > 0)
1060                 {
1061                     int i;
1062                     int ok = 1;
1063                     if (start + number > rr.hits)
1064                         number = odr_int_to_int(rr.hits) - start + 1;
1065
1066                     /* Call bend_present if defined */
1067                     if (assoc->init->bend_present)
1068                     {
1069                         bend_present_rr *bprr = (bend_present_rr*)
1070                             odr_malloc(assoc->decode, sizeof(*bprr));
1071                         bprr->setname = "default";
1072                         bprr->start = start;
1073                         bprr->number = number;
1074                         if (srw_req->recordSchema)
1075                         {
1076                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1077                                                                             sizeof(*bprr->comp));
1078                             bprr->comp->which = Z_RecordComp_simple;
1079                             bprr->comp->u.simple = (Z_ElementSetNames *)
1080                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1081                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1082                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1083                         }
1084                         else
1085                         {
1086                             bprr->comp = 0;
1087                         }
1088                         bprr->stream = assoc->encode;
1089                         bprr->referenceId = 0;
1090                         bprr->print = assoc->print;
1091                         bprr->association = assoc;
1092                         bprr->errcode = 0;
1093                         bprr->errstring = NULL;
1094                         (*assoc->init->bend_present)(assoc->backend, bprr);
1095
1096                         if (bprr->errcode)
1097                         {
1098                             srw_error = yaz_diag_bib1_to_srw(bprr->errcode);
1099                             yaz_add_srw_diagnostic(assoc->encode,
1100                                                    &srw_res->diagnostics,
1101                                                    &srw_res->num_diagnostics,
1102                                                    srw_error, bprr->errstring);
1103                             ok = 0;
1104                         }
1105                     }
1106
1107                     if (ok)
1108                     {
1109                         int j = 0;
1110                         int packing = Z_SRW_recordPacking_string;
1111                         if (srw_req->recordPacking)
1112                         {
1113                             packing =
1114                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1115                             if (packing == -1)
1116                                 packing = Z_SRW_recordPacking_string;
1117                         }
1118                         srw_res->records = (Z_SRW_record *)
1119                             odr_malloc(assoc->encode,
1120                                        number * sizeof(*srw_res->records));
1121
1122                         srw_res->extra_records = (Z_SRW_extra_record **)
1123                             odr_malloc(assoc->encode,
1124                                        number*sizeof(*srw_res->extra_records));
1125
1126                         for (i = 0; i<number; i++)
1127                         {
1128                             int errcode;
1129                             int last_in_set = 0;
1130                             const char *addinfo = 0;
1131
1132                             srw_res->records[j].recordPacking = packing;
1133                             srw_res->records[j].recordData_buf = 0;
1134                             srw_res->extra_records[j] = 0;
1135                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1136                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1137                                                      srw_res->records + j,
1138                                                      &addinfo, &last_in_set);
1139                             if (errcode)
1140                             {
1141                                 yaz_add_srw_diagnostic(assoc->encode,
1142                                                        &srw_res->diagnostics,
1143                                                        &srw_res->num_diagnostics,
1144                                                        yaz_diag_bib1_to_srw(errcode),
1145                                                        addinfo);
1146
1147                                 break;
1148                             }
1149                             if (srw_res->records[j].recordData_buf)
1150                                 j++;
1151                             if (last_in_set)
1152                                 break;
1153                         }
1154                         srw_res->num_records = j;
1155                         if (!j)
1156                             srw_res->records = 0;
1157                     }
1158                 }
1159                 if (rr.extra_response_data)
1160                 {
1161                     res->extraResponseData_buf = rr.extra_response_data;
1162                     res->extraResponseData_len = strlen(rr.extra_response_data);
1163                 }
1164                 if (rr.estimated_hit_count || rr.partial_resultset)
1165                 {
1166                     yaz_add_srw_diagnostic(
1167                         assoc->encode,
1168                         &srw_res->diagnostics,
1169                         &srw_res->num_diagnostics,
1170                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1171                         0);
1172                 }
1173             }
1174         }
1175     }
1176     if (log_request)
1177     {
1178         const char *querystr = "?";
1179         const char *querytype = "?";
1180         WRBUF wr = wrbuf_alloc();
1181
1182         switch (srw_req->query_type)
1183         {
1184         case Z_SRW_query_type_cql:
1185             querytype = "CQL";
1186             querystr = srw_req->query.cql;
1187             break;
1188         case Z_SRW_query_type_pqf:
1189             querytype = "PQF";
1190             querystr = srw_req->query.pqf;
1191             break;
1192         }
1193         wrbuf_printf(wr, "SRWSearch %s ", srw_req->database);
1194         if (srw_res->num_diagnostics)
1195             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1196         else if (*http_code != 200)
1197             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1198         else if (srw_res->numberOfRecords)
1199         {
1200             wrbuf_printf(wr, "OK " ODR_INT_PRINTF,
1201                          (srw_res->numberOfRecords ?
1202                           *srw_res->numberOfRecords : 0));
1203         }
1204         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+%d",
1205                      (srw_res->resultSetId ?
1206                       srw_res->resultSetId : "-"),
1207                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1208                      srw_res->num_records);
1209         yaz_log(log_request, "%s %s: %s", wrbuf_cstr(wr), querytype, querystr);
1210         wrbuf_destroy(wr);
1211     }
1212 }
1213
1214 static char *srw_bend_explain_default(bend_explain_rr *rr)
1215 {
1216 #if YAZ_HAVE_XML2
1217     xmlNodePtr ptr = (xmlNode *) rr->server_node_ptr;
1218     if (!ptr)
1219         return 0;
1220     for (ptr = ptr->children; ptr; ptr = ptr->next)
1221     {
1222         if (ptr->type != XML_ELEMENT_NODE)
1223             continue;
1224         if (!strcmp((const char *) ptr->name, "explain"))
1225         {
1226             int len;
1227             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1228             xmlChar *buf_out;
1229             char *content;
1230
1231             ptr = xmlCopyNode(ptr, 1);
1232
1233             xmlDocSetRootElement(doc, ptr);
1234
1235             xmlDocDumpMemory(doc, &buf_out, &len);
1236             content = (char*) odr_malloc(rr->stream, 1+len);
1237             memcpy(content, buf_out, len);
1238             content[len] = '\0';
1239
1240             xmlFree(buf_out);
1241             xmlFreeDoc(doc);
1242             rr->explain_buf = content;
1243             return 0;
1244         }
1245     }
1246 #endif
1247     return 0;
1248 }
1249
1250 static void srw_bend_explain(association *assoc,
1251                              Z_SRW_PDU *sr,
1252                              Z_SRW_explainResponse *srw_res,
1253                              int *http_code)
1254 {
1255     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1256     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1257     *http_code = 404;
1258     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1259     if (assoc->init)
1260     {
1261         bend_explain_rr rr;
1262
1263         rr.stream = assoc->encode;
1264         rr.decode = assoc->decode;
1265         rr.print = assoc->print;
1266         rr.explain_buf = 0;
1267         rr.database = srw_req->database;
1268         if (assoc->server)
1269             rr.server_node_ptr = assoc->server->server_node_ptr;
1270         else
1271             rr.server_node_ptr = 0;
1272         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1273         if (assoc->init->bend_explain)
1274             (*assoc->init->bend_explain)(assoc->backend, &rr);
1275         else
1276             srw_bend_explain_default(&rr);
1277
1278         if (rr.explain_buf)
1279         {
1280             int packing = Z_SRW_recordPacking_string;
1281             if (srw_req->recordPacking)
1282             {
1283                 packing =
1284                     yaz_srw_str_to_pack(srw_req->recordPacking);
1285                 if (packing == -1)
1286                     packing = Z_SRW_recordPacking_string;
1287             }
1288             srw_res->record.recordSchema = rr.schema;
1289             srw_res->record.recordPacking = packing;
1290             srw_res->record.recordData_buf = rr.explain_buf;
1291             srw_res->record.recordData_len = strlen(rr.explain_buf);
1292             srw_res->record.recordPosition = 0;
1293             *http_code = 200;
1294         }
1295     }
1296 }
1297
1298 static void srw_bend_scan(association *assoc,
1299                           Z_SRW_PDU *sr,
1300                           Z_SRW_scanResponse *srw_res,
1301                           int *http_code)
1302 {
1303     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1304     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1305
1306     *http_code = 200;
1307     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1308     if (srw_res->num_diagnostics == 0 && assoc->init)
1309     {
1310         int step_size = 0;
1311         struct scan_entry *save_entries;
1312
1313         bend_scan_rr *bsrr = (bend_scan_rr *)
1314             odr_malloc(assoc->encode, sizeof(*bsrr));
1315         bsrr->num_bases = 1;
1316         bsrr->basenames = &srw_req->database;
1317
1318         bsrr->num_entries = srw_req->maximumTerms ?
1319             odr_int_to_int(*srw_req->maximumTerms) : 10;
1320         bsrr->term_position = srw_req->responsePosition ?
1321             odr_int_to_int(*srw_req->responsePosition) : 1;
1322
1323         bsrr->errcode = 0;
1324         bsrr->errstring = 0;
1325         bsrr->referenceId = 0;
1326         bsrr->stream = assoc->encode;
1327         bsrr->print = assoc->print;
1328         bsrr->step_size = &step_size;
1329         bsrr->entries = 0;
1330         bsrr->setname = 0;
1331
1332         if (bsrr->num_entries > 0)
1333         {
1334             int i;
1335             bsrr->entries = (struct scan_entry *)
1336                 odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1337                            bsrr->num_entries);
1338             for (i = 0; i<bsrr->num_entries; i++)
1339             {
1340                 bsrr->entries[i].term = 0;
1341                 bsrr->entries[i].occurrences = 0;
1342                 bsrr->entries[i].errcode = 0;
1343                 bsrr->entries[i].errstring = 0;
1344                 bsrr->entries[i].display_term = 0;
1345             }
1346         }
1347         save_entries = bsrr->entries;  /* save it so we can compare later */
1348
1349         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1350             assoc->init->bend_scan)
1351         {
1352             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1353
1354             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1355                                       &bsrr->attributeset,
1356                                       srw_req->scanClause.pqf);
1357             yaz_pqf_destroy(pqf_parser);
1358             bsrr->scanClause = 0;
1359             ((int (*)(void *, bend_scan_rr *))
1360              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1361         }
1362         else if (srw_req->query_type == Z_SRW_query_type_cql
1363                  && assoc->init->bend_scan && assoc->server
1364                  && assoc->server->cql_transform)
1365         {
1366             int srw_error;
1367             bsrr->scanClause = 0;
1368             bsrr->attributeset = 0;
1369             bsrr->term = (Z_AttributesPlusTerm *)
1370                 odr_malloc(assoc->decode, sizeof(*bsrr->term));
1371             srw_error = cql2pqf_scan(assoc->encode,
1372                                      srw_req->scanClause.cql,
1373                                      assoc->server->cql_transform,
1374                                      bsrr->term);
1375             if (srw_error)
1376                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1377                                        &srw_res->num_diagnostics,
1378                                        srw_error, 0);
1379             else
1380             {
1381                 ((int (*)(void *, bend_scan_rr *))
1382                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1383             }
1384         }
1385         else if (srw_req->query_type == Z_SRW_query_type_cql
1386                  && assoc->init->bend_srw_scan)
1387         {
1388             bsrr->term = 0;
1389             bsrr->attributeset = 0;
1390             bsrr->scanClause = srw_req->scanClause.cql;
1391             ((int (*)(void *, bend_scan_rr *))
1392              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1393         }
1394         else
1395         {
1396             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1397                                    &srw_res->num_diagnostics,
1398                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1399         }
1400         if (bsrr->errcode)
1401         {
1402             int srw_error;
1403             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1404             {
1405                 *http_code = 404;
1406                 return;
1407             }
1408             srw_error = yaz_diag_bib1_to_srw(bsrr->errcode);
1409
1410             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1411                                    &srw_res->num_diagnostics,
1412                                    srw_error, bsrr->errstring);
1413         }
1414         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1415         {
1416             int i;
1417             srw_res->terms = (Z_SRW_scanTerm*)
1418                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1419                            bsrr->num_entries);
1420
1421             srw_res->num_terms =  bsrr->num_entries;
1422             for (i = 0; i<bsrr->num_entries; i++)
1423             {
1424                 Z_SRW_scanTerm *t = srw_res->terms + i;
1425                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1426                 t->numberOfRecords =
1427                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1428                 t->displayTerm = 0;
1429                 if (save_entries == bsrr->entries &&
1430                     bsrr->entries[i].display_term)
1431                 {
1432                     /* the entries was _not_ set by the handler. So it's
1433                        safe to test for new member display_term. It is
1434                        NULL'ed by us.
1435                     */
1436                     t->displayTerm = odr_strdup(assoc->encode,
1437                                                 bsrr->entries[i].display_term);
1438                 }
1439                 t->whereInList = 0;
1440             }
1441         }
1442     }
1443     if (log_request)
1444     {
1445         WRBUF wr = wrbuf_alloc();
1446         const char *querytype = 0;
1447         const char *querystr = 0;
1448
1449         switch(srw_req->query_type)
1450         {
1451         case Z_SRW_query_type_pqf:
1452             querytype = "PQF";
1453             querystr = srw_req->scanClause.pqf;
1454             break;
1455         case Z_SRW_query_type_cql:
1456             querytype = "CQL";
1457             querystr = srw_req->scanClause.cql;
1458             break;
1459         default:
1460             querytype = "UNKNOWN";
1461             querystr = "";
1462         }
1463
1464         wrbuf_printf(wr, "SRWScan %s ", srw_req->database);
1465
1466         if (srw_res->num_diagnostics)
1467             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1468         else if (srw_res->num_terms)
1469             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1470         else
1471             wrbuf_printf(wr, "OK - - ");
1472
1473         wrbuf_printf(wr, ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
1474                      (srw_req->responsePosition ?
1475                       *srw_req->responsePosition : 1),
1476                      (srw_req->maximumTerms ?
1477                       *srw_req->maximumTerms : 1));
1478         /* there is no step size in SRU/W ??? */
1479         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1480         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1481         wrbuf_destroy(wr);
1482     }
1483
1484 }
1485
1486 static void srw_bend_update(association *assoc,
1487                             Z_SRW_PDU *sr,
1488                             Z_SRW_updateResponse *srw_res,
1489                             int *http_code)
1490 {
1491     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1492     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1493     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1494     *http_code = 404;
1495     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1496     if (assoc->init)
1497     {
1498         bend_update_rr rr;
1499         Z_SRW_extra_record *extra = srw_req->extra_record;
1500
1501         rr.stream = assoc->encode;
1502         rr.print = assoc->print;
1503         rr.num_bases = 1;
1504         rr.basenames = &srw_req->database;
1505         rr.operation = srw_req->operation;
1506         rr.operation_status = "failed";
1507         rr.record_id = 0;
1508         rr.record_versions = 0;
1509         rr.num_versions = 0;
1510         rr.record_packing = "string";
1511         rr.record_schema = 0;
1512         rr.record_data = 0;
1513         rr.extra_record_data = 0;
1514         rr.extra_request_data = 0;
1515         rr.extra_response_data = 0;
1516         rr.uri = 0;
1517         rr.message = 0;
1518         rr.details = 0;
1519
1520         *http_code = 200;
1521         if (rr.operation == 0)
1522         {
1523             yaz_add_sru_update_diagnostic(
1524                 assoc->encode, &srw_res->diagnostics,
1525                 &srw_res->num_diagnostics,
1526                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1527                 "action" );
1528             return;
1529         }
1530         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1531         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1532         if (!strcmp( rr.operation, "delete"))
1533         {
1534             if (srw_req->record && !srw_req->record->recordSchema)
1535             {
1536                 rr.record_schema = odr_strdup(
1537                     assoc->encode,
1538                     srw_req->record->recordSchema);
1539             }
1540             if (srw_req->record)
1541             {
1542                 rr.record_data = odr_strdupn(
1543                     assoc->encode,
1544                     srw_req->record->recordData_buf,
1545                     srw_req->record->recordData_len );
1546             }
1547             if (extra && extra->extraRecordData_len)
1548             {
1549                 rr.extra_record_data = odr_strdupn(
1550                     assoc->encode,
1551                     extra->extraRecordData_buf,
1552                     extra->extraRecordData_len );
1553             }
1554             if (srw_req->recordId)
1555                 rr.record_id = srw_req->recordId;
1556             else if (extra && extra->recordIdentifier)
1557                 rr.record_id = extra->recordIdentifier;
1558         }
1559         else if (!strcmp(rr.operation, "replace"))
1560         {
1561             if (srw_req->recordId)
1562                 rr.record_id = srw_req->recordId;
1563             else if (extra && extra->recordIdentifier)
1564                 rr.record_id = extra->recordIdentifier;
1565             else
1566             {
1567                 yaz_add_sru_update_diagnostic(
1568                     assoc->encode, &srw_res->diagnostics,
1569                     &srw_res->num_diagnostics,
1570                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1571                     "recordIdentifier");
1572             }
1573             if (!srw_req->record)
1574             {
1575                 yaz_add_sru_update_diagnostic(
1576                     assoc->encode, &srw_res->diagnostics,
1577                     &srw_res->num_diagnostics,
1578                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1579                     "record");
1580             }
1581             else
1582             {
1583                 if (srw_req->record->recordSchema)
1584                     rr.record_schema = odr_strdup(
1585                         assoc->encode, srw_req->record->recordSchema);
1586                 if (srw_req->record->recordData_len )
1587                 {
1588                     rr.record_data = odr_strdupn(assoc->encode,
1589                                                  srw_req->record->recordData_buf,
1590                                                  srw_req->record->recordData_len );
1591                 }
1592                 else
1593                 {
1594                     yaz_add_sru_update_diagnostic(
1595                         assoc->encode, &srw_res->diagnostics,
1596                         &srw_res->num_diagnostics,
1597                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1598                         "recordData" );
1599                 }
1600             }
1601             if (extra && extra->extraRecordData_len)
1602             {
1603                 rr.extra_record_data = odr_strdupn(
1604                     assoc->encode,
1605                     extra->extraRecordData_buf,
1606                     extra->extraRecordData_len );
1607             }
1608         }
1609         else if (!strcmp(rr.operation, "insert"))
1610         {
1611             if (srw_req->recordId)
1612                 rr.record_id = srw_req->recordId;
1613             else if (extra)
1614                 rr.record_id = extra->recordIdentifier;
1615
1616             if (srw_req->record)
1617             {
1618                 if (srw_req->record->recordSchema)
1619                     rr.record_schema = odr_strdup(
1620                         assoc->encode, srw_req->record->recordSchema);
1621
1622                 if (srw_req->record->recordData_len)
1623                     rr.record_data = odr_strdupn(
1624                         assoc->encode,
1625                         srw_req->record->recordData_buf,
1626                         srw_req->record->recordData_len );
1627             }
1628             if (extra && extra->extraRecordData_len)
1629             {
1630                 rr.extra_record_data = odr_strdupn(
1631                     assoc->encode,
1632                     extra->extraRecordData_buf,
1633                     extra->extraRecordData_len );
1634             }
1635         }
1636         else
1637             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1638                                           &srw_res->num_diagnostics,
1639                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1640                                           rr.operation );
1641
1642         if (srw_req->record)
1643         {
1644             const char *pack_str =
1645                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1646             if (pack_str)
1647                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1648         }
1649
1650         if (srw_req->num_recordVersions)
1651         {
1652             rr.record_versions = srw_req->recordVersions;
1653             rr.num_versions = srw_req->num_recordVersions;
1654         }
1655         if (srw_req->extraRequestData_len)
1656         {
1657             rr.extra_request_data = odr_strdupn(assoc->encode,
1658                                                 srw_req->extraRequestData_buf,
1659                                                 srw_req->extraRequestData_len );
1660         }
1661         if (srw_res->num_diagnostics == 0)
1662         {
1663             if ( assoc->init->bend_srw_update)
1664                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1665             else
1666                 yaz_add_sru_update_diagnostic(
1667                     assoc->encode, &srw_res->diagnostics,
1668                     &srw_res->num_diagnostics,
1669                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1670                     "No Update backend handler");
1671         }
1672
1673         if (rr.uri)
1674             yaz_add_srw_diagnostic_uri(assoc->encode,
1675                                        &srw_res->diagnostics,
1676                                        &srw_res->num_diagnostics,
1677                                        rr.uri,
1678                                        rr.message,
1679                                        rr.details);
1680         srw_res->recordId = rr.record_id;
1681         srw_res->operationStatus = rr.operation_status;
1682         srw_res->recordVersions = rr.record_versions;
1683         srw_res->num_recordVersions = rr.num_versions;
1684         if (srw_res->extraResponseData_len)
1685         {
1686             srw_res->extraResponseData_buf = rr.extra_response_data;
1687             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1688         }
1689         if (srw_res->num_diagnostics == 0 && rr.record_data)
1690         {
1691             srw_res->record = yaz_srw_get_record(assoc->encode);
1692             srw_res->record->recordSchema = rr.record_schema;
1693             if (rr.record_packing)
1694             {
1695                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1696
1697                 if (pack == -1)
1698                 {
1699                     pack = Z_SRW_recordPacking_string;
1700                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1701                             rr.record_packing);
1702                 }
1703                 srw_res->record->recordPacking = pack;
1704             }
1705             srw_res->record->recordData_buf = rr.record_data;
1706             srw_res->record->recordData_len = strlen(rr.record_data);
1707             if (rr.extra_record_data)
1708             {
1709                 Z_SRW_extra_record *ex =
1710                     yaz_srw_get_extra_record(assoc->encode);
1711                 srw_res->extra_record = ex;
1712                 ex->extraRecordData_buf = rr.extra_record_data;
1713                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1714             }
1715         }
1716     }
1717 }
1718
1719 /* check if path is OK (1); BAD (0) */
1720 static int check_path(const char *path)
1721 {
1722     if (*path != '/')
1723         return 0;
1724     if (strstr(path, ".."))
1725         return 0;
1726     return 1;
1727 }
1728
1729 static char *read_file(const char *fname, ODR o, size_t *sz)
1730 {
1731     char *buf;
1732     FILE *inf = fopen(fname, "rb");
1733     if (!inf)
1734         return 0;
1735
1736     fseek(inf, 0L, SEEK_END);
1737     *sz = ftell(inf);
1738     rewind(inf);
1739     buf = (char *) odr_malloc(o, *sz);
1740     if (fread(buf, 1, *sz, inf) != *sz)
1741         yaz_log(YLOG_WARN|YLOG_ERRNO, "short read %s", fname);
1742     fclose(inf);
1743     return buf;
1744 }
1745
1746 static void process_http_request(association *assoc, request *req)
1747 {
1748     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1749     ODR o = assoc->encode;
1750     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1751     Z_SRW_PDU *sr = 0;
1752     Z_SOAP *soap_package = 0;
1753     Z_GDU *p = 0;
1754     char *charset = 0;
1755     Z_HTTP_Response *hres = 0;
1756     int keepalive = 1;
1757     const char *stylesheet = 0; /* for now .. set later */
1758     Z_SRW_diagnostic *diagnostic = 0;
1759     int num_diagnostic = 0;
1760     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1761
1762     yaz_log(log_request, "%s %s HTTP/%s", hreq->method, hreq->path, hreq->version);
1763     if (!control_association(assoc, host, 0))
1764     {
1765         p = z_get_HTTP_Response(o, 404);
1766         r = 1;
1767     }
1768     if (r == 2 && assoc->server && assoc->server->docpath
1769         && hreq->path[0] == '/'
1770         &&
1771         /* check if path is a proper prefix of documentroot */
1772         strncmp(hreq->path+1, assoc->server->docpath,
1773                 strlen(assoc->server->docpath))
1774         == 0)
1775     {
1776         if (!check_path(hreq->path))
1777         {
1778             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1779             p = z_get_HTTP_Response(o, 404);
1780         }
1781         else
1782         {
1783             size_t content_size = 0;
1784             char *content_buf = read_file(hreq->path+1, o, &content_size);
1785             if (!content_buf)
1786             {
1787                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1788                 p = z_get_HTTP_Response(o, 404);
1789             }
1790             else
1791             {
1792                 const char *ctype = 0;
1793                 yaz_mime_types types = yaz_mime_types_create();
1794
1795                 yaz_mime_types_add(types, "xsl", "application/xml");
1796                 yaz_mime_types_add(types, "xml", "application/xml");
1797                 yaz_mime_types_add(types, "css", "text/css");
1798                 yaz_mime_types_add(types, "html", "text/html");
1799                 yaz_mime_types_add(types, "htm", "text/html");
1800                 yaz_mime_types_add(types, "txt", "text/plain");
1801                 yaz_mime_types_add(types, "js", "application/x-javascript");
1802
1803                 yaz_mime_types_add(types, "gif", "image/gif");
1804                 yaz_mime_types_add(types, "png", "image/png");
1805                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1806                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1807
1808                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1809                 if (!ctype)
1810                 {
1811                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1812                     p = z_get_HTTP_Response(o, 404);
1813                 }
1814                 else
1815                 {
1816                     p = z_get_HTTP_Response(o, 200);
1817                     hres = p->u.HTTP_Response;
1818                     hres->content_buf = content_buf;
1819                     hres->content_len = content_size;
1820                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1821                 }
1822                 yaz_mime_types_destroy(types);
1823             }
1824         }
1825         r = 1;
1826     }
1827
1828     if (r == 2)
1829     {
1830         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1831         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1832     }
1833     if (r == 2)  /* not taken */
1834     {
1835         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1836                            &diagnostic, &num_diagnostic);
1837         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1838     }
1839     if (r == 0)  /* decode SRW/SRU OK .. */
1840     {
1841         int http_code = 200;
1842         if (sr->which == Z_SRW_searchRetrieve_request)
1843         {
1844             Z_SRW_PDU *res =
1845                 yaz_srw_get_pdu(assoc->encode, Z_SRW_searchRetrieve_response,
1846                                 sr->srw_version);
1847             stylesheet = sr->u.request->stylesheet;
1848             if (num_diagnostic)
1849             {
1850                 res->u.response->diagnostics = diagnostic;
1851                 res->u.response->num_diagnostics = num_diagnostic;
1852             }
1853             else
1854             {
1855                 srw_bend_search(assoc, sr, res, &http_code);
1856             }
1857             if (http_code == 200)
1858                 soap_package->u.generic->p = res;
1859         }
1860         else if (sr->which == Z_SRW_explain_request)
1861         {
1862             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_explain_response,
1863                                              sr->srw_version);
1864             stylesheet = sr->u.explain_request->stylesheet;
1865             if (num_diagnostic)
1866             {
1867                 res->u.explain_response->diagnostics = diagnostic;
1868                 res->u.explain_response->num_diagnostics = num_diagnostic;
1869             }
1870             srw_bend_explain(assoc, sr, res->u.explain_response, &http_code);
1871             if (http_code == 200)
1872                 soap_package->u.generic->p = res;
1873         }
1874         else if (sr->which == Z_SRW_scan_request)
1875         {
1876             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_scan_response,
1877                                              sr->srw_version);
1878             stylesheet = sr->u.scan_request->stylesheet;
1879             if (num_diagnostic)
1880             {
1881                 res->u.scan_response->diagnostics = diagnostic;
1882                 res->u.scan_response->num_diagnostics = num_diagnostic;
1883             }
1884             srw_bend_scan(assoc, sr, res->u.scan_response, &http_code);
1885             if (http_code == 200)
1886                 soap_package->u.generic->p = res;
1887         }
1888         else if (sr->which == Z_SRW_update_request)
1889         {
1890             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_update_response,
1891                                              sr->srw_version);
1892             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1893             if (num_diagnostic)
1894             {
1895                 res->u.update_response->diagnostics = diagnostic;
1896                 res->u.update_response->num_diagnostics = num_diagnostic;
1897             }
1898             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1899             srw_bend_update(assoc, sr, res->u.update_response, &http_code);
1900             if (http_code == 200)
1901                 soap_package->u.generic->p = res;
1902         }
1903         else
1904         {
1905             yaz_log(log_request, "SOAP ERROR");
1906             /* FIXME - what error, what query */
1907             http_code = 500;
1908             z_soap_error(assoc->encode, soap_package,
1909                          "SOAP-ENV:Client", "Bad method", 0);
1910         }
1911         if (http_code == 200 || http_code == 500)
1912         {
1913             static Z_SOAP_Handler soap_handlers[4] = {
1914 #if YAZ_HAVE_XML2
1915                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1916                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1917                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1918 #endif
1919                 {0, 0, 0}
1920             };
1921             char ctype[80];
1922             p = z_get_HTTP_Response(o, 200);
1923             hres = p->u.HTTP_Response;
1924
1925             if (!stylesheet && assoc->server)
1926                 stylesheet = assoc->server->stylesheet;
1927
1928             /* empty stylesheet means NO stylesheet */
1929             if (stylesheet && *stylesheet == '\0')
1930                 stylesheet = 0;
1931
1932             z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1933                                  &hres->content_buf, &hres->content_len,
1934                                  soap_handlers, charset, stylesheet);
1935             hres->code = http_code;
1936
1937             strcpy(ctype, "text/xml");
1938             if (charset && strlen(charset) < sizeof(ctype)-30)
1939             {
1940                 strcat(ctype, "; charset=");
1941                 strcat(ctype, charset);
1942             }
1943             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1944         }
1945         else
1946             p = z_get_HTTP_Response(o, http_code);
1947     }
1948
1949     if (p == 0)
1950         p = z_get_HTTP_Response(o, 500);
1951     hres = p->u.HTTP_Response;
1952     if (!strcmp(hreq->version, "1.0"))
1953     {
1954         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1955         if (v && !strcmp(v, "Keep-Alive"))
1956             keepalive = 1;
1957         else
1958             keepalive = 0;
1959         hres->version = "1.0";
1960     }
1961     else
1962     {
1963         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1964         if (v && !strcmp(v, "close"))
1965             keepalive = 0;
1966         else
1967             keepalive = 1;
1968         hres->version = "1.1";
1969     }
1970     if (!keepalive || !assoc->last_control->keepalive)
1971     {
1972         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1973         assoc->state = ASSOC_DEAD;
1974         assoc->cs_get_mask = 0;
1975     }
1976     else
1977     {
1978         int t;
1979         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1980
1981         if (alive && yaz_isdigit(*(const unsigned char *) alive))
1982             t = atoi(alive);
1983         else
1984             t = 15;
1985         if (t < 0 || t > 3600)
1986             t = 3600;
1987         iochan_settimeout(assoc->client_chan,t);
1988         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1989     }
1990     process_gdu_response(assoc, req, p);
1991 }
1992
1993 static void process_gdu_request(association *assoc, request *req)
1994 {
1995     if (req->gdu_request->which == Z_GDU_Z3950)
1996     {
1997         char *msg = 0;
1998         req->apdu_request = req->gdu_request->u.z3950;
1999         if (process_z_request(assoc, req, &msg) < 0)
2000             do_close_req(assoc, Z_Close_systemProblem, msg, req);
2001     }
2002     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
2003         process_http_request(assoc, req);
2004     else
2005     {
2006         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
2007     }
2008 }
2009
2010 /*
2011  * Initiate request processing.
2012  */
2013 static int process_z_request(association *assoc, request *req, char **msg)
2014 {
2015     Z_APDU *res;
2016     int retval;
2017
2018     *msg = "Unknown Error";
2019     assert(req && req->state == REQUEST_IDLE);
2020     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
2021     {
2022         *msg = "Missing InitRequest";
2023         return -1;
2024     }
2025     switch (req->apdu_request->which)
2026     {
2027     case Z_APDU_initRequest:
2028         res = process_initRequest(assoc, req); break;
2029     case Z_APDU_searchRequest:
2030         res = process_searchRequest(assoc, req); break;
2031     case Z_APDU_presentRequest:
2032         res = process_presentRequest(assoc, req); break;
2033     case Z_APDU_scanRequest:
2034         if (assoc->init->bend_scan)
2035             res = process_scanRequest(assoc, req);
2036         else
2037         {
2038             *msg = "Cannot handle Scan APDU";
2039             return -1;
2040         }
2041         break;
2042     case Z_APDU_extendedServicesRequest:
2043         if (assoc->init->bend_esrequest)
2044             res = process_ESRequest(assoc, req);
2045         else
2046         {
2047             *msg = "Cannot handle Extended Services APDU";
2048             return -1;
2049         }
2050         break;
2051     case Z_APDU_sortRequest:
2052         if (assoc->init->bend_sort)
2053             res = process_sortRequest(assoc, req);
2054         else
2055         {
2056             *msg = "Cannot handle Sort APDU";
2057             return -1;
2058         }
2059         break;
2060     case Z_APDU_close:
2061         process_close(assoc, req);
2062         return 0;
2063     case Z_APDU_deleteResultSetRequest:
2064         if (assoc->init->bend_delete)
2065             res = process_deleteRequest(assoc, req);
2066         else
2067         {
2068             *msg = "Cannot handle Delete APDU";
2069             return -1;
2070         }
2071         break;
2072     case Z_APDU_segmentRequest:
2073         if (assoc->init->bend_segment)
2074         {
2075             res = process_segmentRequest(assoc, req);
2076         }
2077         else
2078         {
2079             *msg = "Cannot handle Segment APDU";
2080             return -1;
2081         }
2082         break;
2083     case Z_APDU_triggerResourceControlRequest:
2084         return 0;
2085     default:
2086         *msg = "Bad APDU received";
2087         return -1;
2088     }
2089     if (res)
2090     {
2091         yaz_log(YLOG_DEBUG, "  result immediately available");
2092         retval = process_z_response(assoc, req, res);
2093     }
2094     else
2095     {
2096         yaz_log(YLOG_DEBUG, "  result unavailable");
2097         retval = -1;
2098     }
2099     return retval;
2100 }
2101
2102 /*
2103  * Encode response, and transfer the request structure to the outgoing queue.
2104  */
2105 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2106 {
2107     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2108
2109     if (assoc->print)
2110     {
2111         if (!z_GDU(assoc->print, &res, 0, 0))
2112             yaz_log(YLOG_WARN, "ODR print error: %s",
2113                 odr_errmsg(odr_geterror(assoc->print)));
2114         odr_reset(assoc->print);
2115     }
2116     if (!z_GDU(assoc->encode, &res, 0, 0))
2117     {
2118         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2119                 odr_errmsg(odr_geterror(assoc->decode)),
2120                 odr_getelement(assoc->decode));
2121         return -1;
2122     }
2123     req->response = odr_getbuf(assoc->encode, &req->len_response,
2124         &req->size_response);
2125     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2126     odr_reset(assoc->encode);
2127     req->state = REQUEST_IDLE;
2128     request_enq(&assoc->outgoing, req);
2129     /* turn the work over to the ir_session handler */
2130     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2131     assoc->cs_put_mask = EVENT_OUTPUT;
2132     /* Is there more work to be done? give that to the input handler too */
2133     for (;;)
2134     {
2135         req = request_head(&assoc->incoming);
2136         if (req && req->state == REQUEST_IDLE)
2137         {
2138             request_deq(&assoc->incoming);
2139             process_gdu_request(assoc, req);
2140         }
2141         else
2142             break;
2143     }
2144     return 0;
2145 }
2146
2147 /*
2148  * Encode response, and transfer the request structure to the outgoing queue.
2149  */
2150 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2151 {
2152     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*gres));
2153     gres->which = Z_GDU_Z3950;
2154     gres->u.z3950 = res;
2155
2156     return process_gdu_response(assoc, req, gres);
2157 }
2158
2159 static char *get_vhost(Z_OtherInformation *otherInfo)
2160 {
2161     return yaz_oi_get_string_oid(&otherInfo, yaz_oid_userinfo_proxy, 1, 0);
2162 }
2163
2164 /*
2165  * Handle init request.
2166  * At the moment, we don't check the options
2167  * anywhere else in the code - we just try not to do anything that would
2168  * break a naive client. We'll toss 'em into the association block when
2169  * we need them there.
2170  */
2171 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2172 {
2173     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2174     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2175     Z_InitResponse *resp = apdu->u.initResponse;
2176     bend_initresult *binitres;
2177     char options[140];
2178     statserv_options_block *cb = 0;  /* by default no control for backend */
2179
2180     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2181         cb = statserv_getcontrol();  /* got control block for backend */
2182
2183     if (cb && assoc->backend)
2184         (*cb->bend_close)(assoc->backend);
2185
2186     yaz_log(log_requestdetail, "Got initRequest");
2187     if (req->implementationId)
2188         yaz_log(log_requestdetail, "Id:        %s",
2189                 req->implementationId);
2190     if (req->implementationName)
2191         yaz_log(log_requestdetail, "Name:      %s",
2192                 req->implementationName);
2193     if (req->implementationVersion)
2194         yaz_log(log_requestdetail, "Version:   %s",
2195                 req->implementationVersion);
2196
2197     assoc_init_reset(assoc);
2198
2199     assoc->init->auth = req->idAuthentication;
2200     assoc->init->referenceId = req->referenceId;
2201
2202     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2203     {
2204         Z_CharSetandLanguageNegotiation *negotiation =
2205             yaz_get_charneg_record (req->otherInfo);
2206         if (negotiation &&
2207             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2208             assoc->init->charneg_request = negotiation;
2209     }
2210
2211     /* by default named_result_sets is 0 .. Enable it if client asks for it. */
2212     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2213         assoc->init->named_result_sets = 1;
2214
2215     assoc->backend = 0;
2216     if (cb)
2217     {
2218         if (req->implementationVersion)
2219             yaz_log(log_requestdetail, "Config:    %s",
2220                     cb->configname);
2221
2222         iochan_settimeout(assoc->client_chan, cb->idle_timeout);
2223
2224         /* we have a backend control block, so call that init function */
2225         if (!(binitres = (*cb->bend_init)(assoc->init)))
2226         {
2227             yaz_log(YLOG_WARN, "Bad response from backend.");
2228             return 0;
2229         }
2230         assoc->backend = binitres->handle;
2231     }
2232     else
2233     {
2234         /* no backend. return error */
2235         binitres = (bend_initresult *)
2236             odr_malloc(assoc->encode, sizeof(*binitres));
2237         binitres->errstring = 0;
2238         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2239         iochan_settimeout(assoc->client_chan, 10);
2240     }
2241     if ((assoc->init->bend_sort))
2242         yaz_log(YLOG_DEBUG, "Sort handler installed");
2243     if ((assoc->init->bend_search))
2244         yaz_log(YLOG_DEBUG, "Search handler installed");
2245     if ((assoc->init->bend_present))
2246         yaz_log(YLOG_DEBUG, "Present handler installed");
2247     if ((assoc->init->bend_esrequest))
2248         yaz_log(YLOG_DEBUG, "ESRequest handler installed");
2249     if ((assoc->init->bend_delete))
2250         yaz_log(YLOG_DEBUG, "Delete handler installed");
2251     if ((assoc->init->bend_scan))
2252         yaz_log(YLOG_DEBUG, "Scan handler installed");
2253     if ((assoc->init->bend_segment))
2254         yaz_log(YLOG_DEBUG, "Segment handler installed");
2255
2256     resp->referenceId = req->referenceId;
2257     *options = '\0';
2258     /* let's tell the client what we can do */
2259     if (ODR_MASK_GET(req->options, Z_Options_search))
2260     {
2261         ODR_MASK_SET(resp->options, Z_Options_search);
2262         strcat(options, "srch");
2263     }
2264     if (ODR_MASK_GET(req->options, Z_Options_present))
2265     {
2266         ODR_MASK_SET(resp->options, Z_Options_present);
2267         strcat(options, " prst");
2268     }
2269     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2270         assoc->init->bend_delete)
2271     {
2272         ODR_MASK_SET(resp->options, Z_Options_delSet);
2273         strcat(options, " del");
2274     }
2275     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2276         assoc->init->bend_esrequest)
2277     {
2278         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2279         strcat(options, " extendedServices");
2280     }
2281     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets)
2282         && assoc->init->named_result_sets)
2283     {
2284         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2285         strcat(options, " namedresults");
2286     }
2287     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2288     {
2289         ODR_MASK_SET(resp->options, Z_Options_scan);
2290         strcat(options, " scan");
2291     }
2292     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2293     {
2294         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2295         strcat(options, " concurrop");
2296     }
2297     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2298     {
2299         ODR_MASK_SET(resp->options, Z_Options_sort);
2300         strcat(options, " sort");
2301     }
2302
2303     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2304     {
2305         Z_OtherInformationUnit *p0;
2306
2307         if (!assoc->init->charneg_response)
2308         {
2309             if (assoc->init->query_charset)
2310             {
2311                 assoc->init->charneg_response = yaz_set_response_charneg(
2312                     assoc->encode, assoc->init->query_charset, 0,
2313                     assoc->init->records_in_same_charset);
2314             }
2315             else
2316             {
2317                 yaz_log(YLOG_WARN, "default query_charset not defined by backend");
2318             }
2319         }
2320         if (assoc->init->charneg_response
2321             && (p0=yaz_oi_update(&resp->otherInfo, assoc->encode, NULL, 0, 0)))
2322         {
2323             p0->which = Z_OtherInfo_externallyDefinedInfo;
2324             p0->information.externallyDefinedInfo =
2325                 assoc->init->charneg_response;
2326             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2327             strcat(options, " negotiation");
2328         }
2329     }
2330     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2331         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2332
2333     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2334     {
2335         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2336         assoc->version = 1; /* 1 & 2 are equivalent */
2337     }
2338     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2339     {
2340         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2341         assoc->version = 2;
2342     }
2343     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2344     {
2345         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2346         assoc->version = 3;
2347     }
2348
2349     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2350
2351     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2352         assoc->maximumRecordSize = odr_int_to_int(*req->maximumRecordSize);
2353
2354     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2355         assoc->preferredMessageSize = odr_int_to_int(*req->preferredMessageSize);
2356
2357     resp->preferredMessageSize =
2358         odr_intdup(assoc->encode, assoc->preferredMessageSize);
2359     resp->maximumRecordSize =
2360         odr_intdup(assoc->encode, assoc->maximumRecordSize);
2361
2362     resp->implementationId = odr_prepend(assoc->encode,
2363                 assoc->init->implementation_id,
2364                 resp->implementationId);
2365
2366     resp->implementationVersion = odr_prepend(assoc->encode,
2367                 assoc->init->implementation_version,
2368                 resp->implementationVersion);
2369
2370     resp->implementationName = odr_prepend(assoc->encode,
2371                 assoc->init->implementation_name,
2372                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2373
2374     if (binitres->errcode)
2375     {
2376         assoc->state = ASSOC_DEAD;
2377         resp->userInformationField =
2378             init_diagnostics(assoc->encode, binitres->errcode,
2379                              binitres->errstring);
2380         *resp->result = 0;
2381     }
2382     else
2383         assoc->state = ASSOC_UP;
2384
2385     if (log_request)
2386     {
2387         if (!req->idAuthentication)
2388             yaz_log(log_request, "Auth none");
2389         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2390         {
2391             const char *open = req->idAuthentication->u.open;
2392             const char *slash = strchr(open, '/');
2393             int len;
2394             if (slash)
2395                 len = slash - open;
2396             else
2397                 len = strlen(open);
2398                 yaz_log(log_request, "Auth open %.*s", len, open);
2399         }
2400         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2401         {
2402             const char *user = req->idAuthentication->u.idPass->userId;
2403             const char *group = req->idAuthentication->u.idPass->groupId;
2404             yaz_log(log_request, "Auth idPass %s %s",
2405                     user ? user : "-", group ? group : "-");
2406         }
2407         else if (req->idAuthentication->which
2408                  == Z_IdAuthentication_anonymous)
2409         {
2410             yaz_log(log_request, "Auth anonymous");
2411         }
2412         else
2413         {
2414             yaz_log(log_request, "Auth other");
2415         }
2416     }
2417     if (log_request)
2418     {
2419         WRBUF wr = wrbuf_alloc();
2420         wrbuf_printf(wr, "Init ");
2421         if (binitres->errcode)
2422             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2423         else
2424             wrbuf_printf(wr, "OK -");
2425         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2426                      (req->implementationId ? req->implementationId :"-"),
2427                      (req->implementationName ?
2428                       req->implementationName : "-"),
2429                      (req->implementationVersion ?
2430                       req->implementationVersion : "-")
2431             );
2432         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2433         wrbuf_destroy(wr);
2434     }
2435     return apdu;
2436 }
2437
2438 /*
2439  * Set the specified `errcode' and `errstring' into a UserInfo-1
2440  * external to be returned to the client in accordance with Z35.90
2441  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2442  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2443  */
2444 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2445 {
2446     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2447         addinfo ? " -- " : "", addinfo ? addinfo : "");
2448     return zget_init_diagnostics(odr, error, addinfo);
2449 }
2450
2451 /*
2452  * nonsurrogate diagnostic record.
2453  */
2454 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2455 {
2456     Z_Records *rec = (Z_Records *) odr_malloc(assoc->encode, sizeof(*rec));
2457
2458     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2459             addinfo ? " -- " : "", addinfo ? addinfo : "");
2460
2461     rec->which = Z_Records_NSD;
2462     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2463                                                            error, addinfo);
2464     return rec;
2465 }
2466
2467 /*
2468  * surrogate diagnostic.
2469  */
2470 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2471                                           const char *dbname,
2472                                           int error, const char *addinfo)
2473 {
2474     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2475             addinfo ? " -- " : "", addinfo ? addinfo : "");
2476     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2477 }
2478
2479 static Z_Records *pack_records(association *a, char *setname, Odr_int start,
2480                                Odr_int *num, Z_RecordComposition *comp,
2481                                Odr_int *next, Odr_int *pres,
2482                                Z_ReferenceId *referenceId,
2483                                Odr_oid *oid, int *errcode)
2484 {
2485     int recno, total_length = 0, dumped_records = 0;
2486     int toget = odr_int_to_int(*num);
2487     Z_Records *records =
2488         (Z_Records *) odr_malloc(a->encode, sizeof(*records));
2489     Z_NamePlusRecordList *reclist =
2490         (Z_NamePlusRecordList *) odr_malloc(a->encode, sizeof(*reclist));
2491
2492     records->which = Z_Records_DBOSD;
2493     records->u.databaseOrSurDiagnostics = reclist;
2494     reclist->num_records = 0;
2495
2496     if (toget < 0)
2497         return diagrec(a, YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE, 0);
2498     else if (toget == 0)
2499         reclist->records = odr_nullval();
2500     else
2501         reclist->records = (Z_NamePlusRecord **)
2502             odr_malloc(a->encode, sizeof(*reclist->records) * toget);
2503
2504     *pres = Z_PresentStatus_success;
2505     *num = 0;
2506     *next = 0;
2507
2508     yaz_log(log_requestdetail, "Request to pack " ODR_INT_PRINTF "+%d %s", start, toget, setname);
2509     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2510         a->maximumRecordSize);
2511     for (recno = odr_int_to_int(start); reclist->num_records < toget; recno++)
2512     {
2513         bend_fetch_rr freq;
2514         Z_NamePlusRecord *thisrec;
2515         int this_length = 0;
2516         /*
2517          * we get the number of bytes allocated on the stream before any
2518          * allocation done by the backend - this should give us a reasonable
2519          * idea of the total size of the data so far.
2520          */
2521         total_length = odr_total(a->encode) - dumped_records;
2522         freq.errcode = 0;
2523         freq.errstring = 0;
2524         freq.basename = 0;
2525         freq.len = 0;
2526         freq.record = 0;
2527         freq.last_in_set = 0;
2528         freq.setname = setname;
2529         freq.surrogate_flag = 0;
2530         freq.number = recno;
2531         freq.comp = comp;
2532         freq.request_format = oid;
2533         freq.output_format = 0;
2534         freq.stream = a->encode;
2535         freq.print = a->print;
2536         freq.referenceId = referenceId;
2537         freq.schema = 0;
2538
2539         retrieve_fetch(a, &freq);
2540
2541         *next = freq.last_in_set ? 0 : recno + 1;
2542
2543         if (freq.errcode)
2544         {
2545             if (!freq.surrogate_flag) /* non-surrogate diagnostic i.e. global */
2546             {
2547                 char s[20];
2548                 *pres = Z_PresentStatus_failure;
2549                 /* for 'present request out of range',
2550                    set addinfo to record position if not set */
2551                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2552                                 freq.errstring == 0)
2553                 {
2554                     sprintf(s, "%d", recno);
2555                     freq.errstring = s;
2556                 }
2557                 if (errcode)
2558                     *errcode = freq.errcode;
2559                 return diagrec(a, freq.errcode, freq.errstring);
2560             }
2561             reclist->records[reclist->num_records] =
2562                 surrogatediagrec(a, freq.basename, freq.errcode,
2563                                  freq.errstring);
2564             reclist->num_records++;
2565             continue;
2566         }
2567         if (freq.record == 0)  /* no error and no record ? */
2568         {
2569             *pres = Z_PresentStatus_partial_4;
2570             *next = 0;   /* signal end-of-set and stop */
2571             break;
2572         }
2573         if (freq.len >= 0)
2574             this_length = freq.len;
2575         else
2576             this_length = odr_total(a->encode) - total_length - dumped_records;
2577         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2578             this_length, total_length, dumped_records);
2579         if (a->preferredMessageSize > 0 &&
2580                 this_length + total_length > a->preferredMessageSize)
2581         {
2582             /* record is small enough, really */
2583             if (this_length <= a->preferredMessageSize && recno > start)
2584             {
2585                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2586                 *pres = Z_PresentStatus_partial_2;
2587                 if (*next > 0)
2588                     (*next)--;
2589                 break;
2590             }
2591             /* record can only be fetched by itself */
2592             if (this_length < a->maximumRecordSize)
2593             {
2594                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2595                 if (toget > 1)
2596                 {
2597                     yaz_log(YLOG_DEBUG, "  Dropped it");
2598                     reclist->records[reclist->num_records] =
2599                          surrogatediagrec(
2600                              a, freq.basename,
2601                              YAZ_BIB1_RECORD_EXCEEDS_PREFERRED_MESSAGE_SIZE, 0);
2602                     reclist->num_records++;
2603                     dumped_records += this_length;
2604                     continue;
2605                 }
2606             }
2607             else /* too big entirely */
2608             {
2609                 yaz_log(log_requestdetail, "Record > maxrcdsz "
2610                         "this=%d max=%d",
2611                         this_length, a->maximumRecordSize);
2612                 reclist->records[reclist->num_records] =
2613                     surrogatediagrec(
2614                         a, freq.basename,
2615                         YAZ_BIB1_RECORD_EXCEEDS_MAXIMUM_RECORD_SIZE, 0);
2616                 reclist->num_records++;
2617                 dumped_records += this_length;
2618                 continue;
2619             }
2620         }
2621
2622         if (!(thisrec = (Z_NamePlusRecord *)
2623               odr_malloc(a->encode, sizeof(*thisrec))))
2624             return 0;
2625         thisrec->databaseName = odr_strdup_null(a->encode, freq.basename);
2626         thisrec->which = Z_NamePlusRecord_databaseRecord;
2627
2628         if (!freq.output_format)
2629         {
2630             yaz_log(YLOG_WARN, "bend_fetch output_format not set");
2631             return 0;
2632         }
2633         thisrec->u.databaseRecord = z_ext_record_oid(
2634             a->encode, freq.output_format, freq.record, freq.len);
2635         if (!thisrec->u.databaseRecord)
2636             return 0;
2637         reclist->records[reclist->num_records] = thisrec;
2638         reclist->num_records++;
2639         if (freq.last_in_set)
2640             break;
2641     }
2642     *num = reclist->num_records;
2643     return records;
2644 }
2645
2646 static Z_APDU *process_searchRequest(association *assoc, request *reqb)
2647 {
2648     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2649     bend_search_rr *bsrr =
2650         (bend_search_rr *)nmem_malloc(reqb->request_mem, sizeof(*bsrr));
2651
2652     yaz_log(log_requestdetail, "Got SearchRequest.");
2653     bsrr->association = assoc;
2654     bsrr->referenceId = req->referenceId;
2655     bsrr->srw_sortKeys = 0;
2656     bsrr->srw_setname = 0;
2657     bsrr->srw_setnameIdleTime = 0;
2658     bsrr->estimated_hit_count = 0;
2659     bsrr->partial_resultset = 0;
2660     bsrr->extra_args = 0;
2661     bsrr->extra_response_data = 0;
2662
2663     yaz_log(log_requestdetail, "ResultSet '%s'", req->resultSetName);
2664     if (req->databaseNames)
2665     {
2666         int i;
2667         for (i = 0; i < req->num_databaseNames; i++)
2668             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2669     }
2670
2671     yaz_log_zquery_level(log_requestdetail,req->query);
2672
2673     if (assoc->init->bend_search)
2674     {
2675         bsrr->setname = req->resultSetName;
2676         bsrr->replace_set = *req->replaceIndicator;
2677         bsrr->num_bases = req->num_databaseNames;
2678         bsrr->basenames = req->databaseNames;
2679         bsrr->query = req->query;
2680         bsrr->stream = assoc->encode;
2681         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2682         bsrr->decode = assoc->decode;
2683         bsrr->print = assoc->print;
2684         bsrr->hits = 0;
2685         bsrr->errcode = 0;
2686         bsrr->errstring = NULL;
2687         bsrr->search_info = NULL;
2688         bsrr->search_input = req->otherInfo;
2689         bsrr->present_number = *req->mediumSetPresentNumber;
2690
2691         if (assoc->server && assoc->server->cql_transform
2692             && req->query->which == Z_Query_type_104
2693             && req->query->u.type_104->which == Z_External_CQL)
2694         {
2695             /* have a CQL query and a CQL to PQF transform .. */
2696             int srw_errcode =
2697                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2698                         assoc->server->cql_transform, bsrr->query,
2699                         &bsrr->srw_sortKeys);
2700             if (srw_errcode)
2701                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2702         }
2703
2704         if (assoc->server && assoc->server->ccl_transform
2705             && req->query->which == Z_Query_type_2) /*CCL*/
2706         {
2707             /* have a CCL query and a CCL to PQF transform .. */
2708             int srw_errcode =
2709                 ccl2pqf(bsrr->stream, req->query->u.type_2,
2710                         assoc->server->ccl_transform, bsrr);
2711             if (srw_errcode)
2712                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2713         }
2714
2715         if (!bsrr->errcode)
2716             (assoc->init->bend_search)(assoc->backend, bsrr);
2717     }
2718     else
2719     {
2720         /* FIXME - make a diagnostic for it */
2721         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2722     }
2723     return response_searchRequest(assoc, reqb, bsrr);
2724 }
2725
2726 /*
2727  * Prepare a searchresponse based on the backend results. We probably want
2728  * to look at making the fetching of records nonblocking as well, but
2729  * so far, we'll keep things simple.
2730  * If bsrt is null, that means we're called in response to a communications
2731  * event, and we'll have to get the response for ourselves.
2732  */
2733 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2734                                       bend_search_rr *bsrt)
2735 {
2736     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2737     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2738     Z_SearchResponse *resp = (Z_SearchResponse *)
2739         odr_malloc(assoc->encode, sizeof(*resp));
2740     Odr_int *nulint = odr_intdup(assoc->encode, 0);
2741     Odr_int *next = odr_intdup(assoc->encode, 0);
2742     Odr_int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2743     Odr_int returnedrecs = 0;
2744
2745     apdu->which = Z_APDU_searchResponse;
2746     apdu->u.searchResponse = resp;
2747     resp->referenceId = req->referenceId;
2748     resp->additionalSearchInfo = 0;
2749     resp->otherInfo = 0;
2750     if (!bsrt)
2751     {
2752         yaz_log(YLOG_FATAL, "Bad result from backend");
2753         return 0;
2754     }
2755     else if (bsrt->errcode)
2756     {
2757         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2758         resp->resultCount = nulint;
2759         resp->numberOfRecordsReturned = nulint;
2760         resp->nextResultSetPosition = nulint;
2761         resp->searchStatus = odr_booldup(assoc->encode, 0);
2762         resp->resultSetStatus = none;
2763         resp->presentStatus = 0;
2764     }
2765     else
2766     {
2767         bool_t *sr = odr_booldup(assoc->encode, 1);
2768         Odr_int *toget = odr_intdup(assoc->encode, 0);
2769         Z_RecordComposition comp, *compp = 0;
2770
2771         yaz_log(log_requestdetail, "resultCount: " ODR_INT_PRINTF, bsrt->hits);
2772
2773         resp->records = 0;
2774         resp->resultCount = &bsrt->hits;
2775
2776         comp.which = Z_RecordComp_simple;
2777         /* how many records does the user agent want, then? */
2778         if (bsrt->hits < 0)
2779             *toget = 0;
2780         else if (bsrt->hits <= *req->smallSetUpperBound)
2781         {
2782             *toget = bsrt->hits;
2783             if ((comp.u.simple = req->smallSetElementSetNames))
2784                 compp = &comp;
2785         }
2786         else if (bsrt->hits < *req->largeSetLowerBound)
2787         {
2788             *toget = *req->mediumSetPresentNumber;
2789             if (*toget > bsrt->hits)
2790                 *toget = bsrt->hits;
2791             if ((comp.u.simple = req->mediumSetElementSetNames))
2792                 compp = &comp;
2793         }
2794         else
2795             *toget = 0;
2796
2797         if (*toget && !resp->records)
2798         {
2799             Odr_int *presst = odr_intdup(assoc->encode, 0);
2800             /* Call bend_present if defined */
2801             if (assoc->init->bend_present)
2802             {
2803                 bend_present_rr *bprr = (bend_present_rr *)
2804                     nmem_malloc(reqb->request_mem, sizeof(*bprr));
2805                 bprr->setname = req->resultSetName;
2806                 bprr->start = 1;
2807                 bprr->number = odr_int_to_int(*toget);
2808                 bprr->format = req->preferredRecordSyntax;
2809                 bprr->comp = compp;
2810                 bprr->referenceId = req->referenceId;
2811                 bprr->stream = assoc->encode;
2812                 bprr->print = assoc->print;
2813                 bprr->association = assoc;
2814                 bprr->errcode = 0;
2815                 bprr->errstring = NULL;
2816                 (*assoc->init->bend_present)(assoc->backend, bprr);
2817
2818                 if (bprr->errcode)
2819                 {
2820                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2821                     *resp->presentStatus = Z_PresentStatus_failure;
2822                 }
2823             }
2824
2825             if (!resp->records)
2826                 resp->records = pack_records(
2827                     assoc, req->resultSetName, 1,
2828                     toget, compp, next, presst, req->referenceId,
2829                     req->preferredRecordSyntax, NULL);
2830             if (!resp->records)
2831                 return 0;
2832             resp->numberOfRecordsReturned = toget;
2833             returnedrecs = *toget;
2834             resp->presentStatus = presst;
2835         }
2836         else
2837         {
2838             if (*resp->resultCount)
2839                 *next = 1;
2840             resp->numberOfRecordsReturned = nulint;
2841             resp->presentStatus = 0;
2842         }
2843         resp->nextResultSetPosition = next;
2844         resp->searchStatus = sr;
2845         resp->resultSetStatus = 0;
2846         if (bsrt->estimated_hit_count)
2847         {
2848             resp->resultSetStatus = odr_intdup(assoc->encode,
2849                                                Z_SearchResponse_estimate);
2850         }
2851         else if (bsrt->partial_resultset)
2852         {
2853             resp->resultSetStatus = odr_intdup(assoc->encode,
2854                                                Z_SearchResponse_subset);
2855         }
2856     }
2857     resp->additionalSearchInfo = bsrt->search_info;
2858
2859     if (log_request)
2860     {
2861         int i;
2862         WRBUF wr = wrbuf_alloc();
2863
2864         for (i = 0 ; i < req->num_databaseNames; i++)
2865         {
2866             if (i)
2867                 wrbuf_printf(wr, "+");
2868             wrbuf_puts(wr, req->databaseNames[i]);
2869         }
2870         wrbuf_printf(wr, " ");
2871
2872         if (bsrt->errcode)
2873             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2874         else
2875             wrbuf_printf(wr, "OK " ODR_INT_PRINTF, bsrt->hits);
2876         wrbuf_printf(wr, " %s 1+" ODR_INT_PRINTF " ",
2877                      req->resultSetName, returnedrecs);
2878         yaz_query_to_wrbuf(wr, req->query);
2879
2880         yaz_log(log_request, "Search %s", wrbuf_cstr(wr));
2881         wrbuf_destroy(wr);
2882     }
2883     return apdu;
2884 }
2885
2886 /*
2887  * Maybe we got a little over-friendly when we designed bend_fetch to
2888  * get only one record at a time. Some backends can optimise multiple-record
2889  * fetches, and at any rate, there is some overhead involved in
2890  * all that selecting and hopping around. Problem is, of course, that the
2891  * frontend can't know ahead of time how many records it'll need to
2892  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2893  * is downright lousy as a bulk data transfer protocol.
2894  *
2895  * To start with, we'll do the fetching of records from the backend
2896  * in one operation: To save some trips in and out of the event-handler,
2897  * and to simplify the interface to pack_records. At any rate, asynch
2898  * operation is more fun in operations that have an unpredictable execution
2899  * speed - which is normally more true for search than for present.
2900  */
2901 static Z_APDU *process_presentRequest(association *assoc, request *reqb)
2902 {
2903     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2904     Z_APDU *apdu;
2905     Z_PresentResponse *resp;
2906     Odr_int *next;
2907     Odr_int *num;
2908     int errcode = 0;
2909
2910     yaz_log(log_requestdetail, "Got PresentRequest.");
2911
2912     resp = (Z_PresentResponse *)odr_malloc(assoc->encode, sizeof(*resp));
2913     resp->records = 0;
2914     resp->presentStatus = odr_intdup(assoc->encode, 0);
2915     if (assoc->init->bend_present)
2916     {
2917         bend_present_rr *bprr = (bend_present_rr *)
2918             nmem_malloc(reqb->request_mem, sizeof(*bprr));
2919         bprr->setname = req->resultSetId;
2920         bprr->start = odr_int_to_int(*req->resultSetStartPoint);
2921         bprr->number = odr_int_to_int(*req->numberOfRecordsRequested);
2922         bprr->format = req->preferredRecordSyntax;
2923         bprr->comp = req->recordComposition;
2924         bprr->referenceId = req->referenceId;
2925         bprr->stream = assoc->encode;
2926         bprr->print = assoc->print;
2927         bprr->association = assoc;
2928         bprr->errcode = 0;
2929         bprr->errstring = NULL;
2930         (*assoc->init->bend_present)(assoc->backend, bprr);
2931
2932         if (bprr->errcode)
2933         {
2934             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2935             *resp->presentStatus = Z_PresentStatus_failure;
2936             errcode = bprr->errcode;
2937         }
2938     }
2939     apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2940     next = odr_intdup(assoc->encode, 0);
2941     num = odr_intdup(assoc->encode, 0);
2942
2943     apdu->which = Z_APDU_presentResponse;
2944     apdu->u.presentResponse = resp;
2945     resp->referenceId = req->referenceId;
2946     resp->otherInfo = 0;
2947
2948     if (!resp->records)
2949     {
2950         *num = *req->numberOfRecordsRequested;
2951         resp->records =
2952             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2953                          num, req->recordComposition, next,
2954                          resp->presentStatus,
2955                          req->referenceId, req->preferredRecordSyntax,
2956                          &errcode);
2957     }
2958     if (log_request)
2959     {
2960         WRBUF wr = wrbuf_alloc();
2961         wrbuf_printf(wr, "Present ");
2962
2963         if (*resp->presentStatus == Z_PresentStatus_failure)
2964             wrbuf_printf(wr, "ERROR %d ", errcode);
2965         else if (*resp->presentStatus == Z_PresentStatus_success)
2966             wrbuf_printf(wr, "OK -  ");
2967         else
2968             wrbuf_printf(wr, "Partial " ODR_INT_PRINTF " - ",
2969                          *resp->presentStatus);
2970
2971         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
2972                 req->resultSetId, *req->resultSetStartPoint,
2973                 *req->numberOfRecordsRequested);
2974         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
2975         wrbuf_destroy(wr);
2976     }
2977     if (!resp->records)
2978         return 0;
2979     resp->numberOfRecordsReturned = num;
2980     resp->nextResultSetPosition = next;
2981
2982     return apdu;
2983 }
2984
2985 /*
2986  * Scan was implemented rather in a hurry, and with support for only the basic
2987  * elements of the service in the backend API. Suggestions are welcome.
2988  */
2989 static Z_APDU *process_scanRequest(association *assoc, request *reqb)
2990 {
2991     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2992     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2993     Z_ScanResponse *res = (Z_ScanResponse *)
2994         odr_malloc(assoc->encode, sizeof(*res));
2995     Odr_int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2996     Odr_int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2997     Z_ListEntries *ents = (Z_ListEntries *)
2998         odr_malloc(assoc->encode, sizeof(*ents));
2999     Z_DiagRecs *diagrecs_p = NULL;
3000     bend_scan_rr *bsrr = (bend_scan_rr *)
3001         odr_malloc(assoc->encode, sizeof(*bsrr));
3002     struct scan_entry *save_entries;
3003     int step_size = 0;
3004
3005     yaz_log(log_requestdetail, "Got ScanRequest");
3006
3007     apdu->which = Z_APDU_scanResponse;
3008     apdu->u.scanResponse = res;
3009     res->referenceId = req->referenceId;
3010
3011     /* if step is absent, set it to 0 */
3012     if (req->stepSize)
3013         step_size = odr_int_to_int(*req->stepSize);
3014
3015     res->stepSize = 0;
3016     res->scanStatus = scanStatus;
3017     res->numberOfEntriesReturned = numberOfEntriesReturned;
3018     res->positionOfTerm = 0;
3019     res->entries = ents;
3020     ents->num_entries = 0;
3021     ents->entries = NULL;
3022     ents->num_nonsurrogateDiagnostics = 0;
3023     ents->nonsurrogateDiagnostics = NULL;
3024     res->attributeSet = 0;
3025     res->otherInfo = 0;
3026
3027     if (req->databaseNames)
3028     {
3029         int i;
3030         for (i = 0; i < req->num_databaseNames; i++)
3031             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
3032     }
3033     bsrr->scanClause = 0;
3034     bsrr->errcode = 0;
3035     bsrr->errstring = 0;
3036     bsrr->num_bases = req->num_databaseNames;
3037     bsrr->basenames = req->databaseNames;
3038     bsrr->num_entries = odr_int_to_int(*req->numberOfTermsRequested);
3039     bsrr->term = req->termListAndStartPoint;
3040     bsrr->referenceId = req->referenceId;
3041     bsrr->stream = assoc->encode;
3042     bsrr->print = assoc->print;
3043     bsrr->step_size = &step_size;
3044     bsrr->setname = yaz_oi_get_string_oid(&req->otherInfo,
3045                                           yaz_oid_userinfo_scan_set, 1, 0);
3046     bsrr->entries = 0;
3047     /* For YAZ 2.0 and earlier it was the backend handler that
3048        initialized entries (member display_term did not exist)
3049        YAZ 2.0 and later sets 'entries'  and initialize all members
3050        including 'display_term'. If YAZ 2.0 or later sees that
3051        entries was modified - we assume that it is an old handler and
3052        that 'display_term' is _not_ set.
3053     */
3054     if (bsrr->num_entries > 0)
3055     {
3056         int i;
3057         bsrr->entries = (struct scan_entry *)
3058             odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3059                        bsrr->num_entries);
3060         for (i = 0; i<bsrr->num_entries; i++)
3061         {
3062             bsrr->entries[i].term = 0;
3063             bsrr->entries[i].occurrences = 0;
3064             bsrr->entries[i].errcode = 0;
3065             bsrr->entries[i].errstring = 0;
3066             bsrr->entries[i].display_term = 0;
3067         }
3068     }
3069     save_entries = bsrr->entries;  /* save it so we can compare later */
3070
3071     bsrr->attributeset = req->attributeSet;
3072     log_scan_term_level(log_requestdetail, req->termListAndStartPoint,
3073                         bsrr->attributeset);
3074     bsrr->term_position = req->preferredPositionInResponse ?
3075         odr_int_to_int(*req->preferredPositionInResponse) : 1;
3076
3077     ((int (*)(void *, bend_scan_rr *))
3078      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3079
3080     if (bsrr->errcode)
3081         diagrecs_p = zget_DiagRecs(assoc->encode,
3082                                    bsrr->errcode, bsrr->errstring);
3083     else
3084     {
3085         int i;
3086         Z_Entry **tab = (Z_Entry **)
3087             odr_malloc(assoc->encode, sizeof(*tab) * bsrr->num_entries);
3088
3089         if (bsrr->status == BEND_SCAN_PARTIAL)
3090             *scanStatus = Z_Scan_partial_5;
3091         else
3092             *scanStatus = Z_Scan_success;
3093         res->stepSize = odr_intdup(assoc->encode, step_size);
3094         ents->entries = tab;
3095         ents->num_entries = bsrr->num_entries;
3096         res->numberOfEntriesReturned = odr_intdup(assoc->encode,
3097                                                    ents->num_entries);
3098         res->positionOfTerm = odr_intdup(assoc->encode, bsrr->term_position);
3099         for (i = 0; i < bsrr->num_entries; i++)
3100         {
3101             Z_Entry *e;
3102             Z_TermInfo *t;
3103             Odr_oct *o;
3104
3105             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3106             if (bsrr->entries[i].occurrences >= 0)
3107             {
3108                 e->which = Z_Entry_termInfo;
3109                 e->u.termInfo = t = (Z_TermInfo *)
3110                     odr_malloc(assoc->encode, sizeof(*t));
3111                 t->suggestedAttributes = 0;
3112                 t->displayTerm = 0;
3113                 if (save_entries == bsrr->entries &&
3114                     bsrr->entries[i].display_term)
3115                 {
3116                     /* the entries was _not_ set by the handler. So it's
3117                        safe to test for new member display_term. It is
3118                        NULL'ed by us.
3119                     */
3120                     t->displayTerm = odr_strdup(assoc->encode,
3121                                                 bsrr->entries[i].display_term);
3122                 }
3123                 t->alternativeTerm = 0;
3124                 t->byAttributes = 0;
3125                 t->otherTermInfo = 0;
3126                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3127                 t->term = (Z_Term *)
3128                     odr_malloc(assoc->encode, sizeof(*t->term));
3129                 t->term->which = Z_Term_general;
3130                 t->term->u.general = o =
3131                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3132                 o->buf = (unsigned char *)
3133                     odr_malloc(assoc->encode, o->len = o->size =
3134                                strlen(bsrr->entries[i].term));
3135                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3136                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (" ODR_INT_PRINTF ")", i,
3137                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3138             }
3139             else
3140             {
3141                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3142                                                   bsrr->entries[i].errcode,
3143                                                   bsrr->entries[i].errstring);
3144                 assert(drecs->num_diagRecs == 1);
3145                 e->which = Z_Entry_surrogateDiagnostic;
3146                 assert(drecs->diagRecs[0]);
3147                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3148             }
3149         }
3150     }
3151     if (diagrecs_p)
3152     {
3153         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3154         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3155     }
3156     if (log_request)
3157     {
3158         int i;
3159         WRBUF wr = wrbuf_alloc();
3160         wrbuf_printf(wr, "Scan ");
3161         for (i = 0 ; i < req->num_databaseNames; i++)
3162         {
3163             if (i)
3164                 wrbuf_printf(wr, "+");
3165             wrbuf_puts(wr, req->databaseNames[i]);
3166         }
3167
3168         wrbuf_printf(wr, " ");
3169
3170         if (bsrr->errcode)
3171             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3172         else
3173             wrbuf_printf(wr, "OK");
3174
3175         wrbuf_printf(wr, " " ODR_INT_PRINTF " - " ODR_INT_PRINTF "+"
3176                      ODR_INT_PRINTF "+" ODR_INT_PRINTF,
3177                      res->numberOfEntriesReturned ?
3178                      *res->numberOfEntriesReturned : 0,
3179                      (req->preferredPositionInResponse ?
3180                       *req->preferredPositionInResponse : 1),
3181                      *req->numberOfTermsRequested,
3182                      (res->stepSize ? *res->stepSize : 1));
3183
3184         if (bsrr->setname)
3185             wrbuf_printf(wr, "+%s", bsrr->setname);
3186
3187         wrbuf_printf(wr, " ");
3188         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3189                           bsrr->attributeset);
3190         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3191         wrbuf_destroy(wr);
3192     }
3193     return apdu;
3194 }
3195
3196 static Z_APDU *process_sortRequest(association *assoc, request *reqb)
3197 {
3198     int i;
3199     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3200     Z_SortResponse *res = (Z_SortResponse *)
3201         odr_malloc(assoc->encode, sizeof(*res));
3202     bend_sort_rr *bsrr = (bend_sort_rr *)
3203         odr_malloc(assoc->encode, sizeof(*bsrr));
3204
3205     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3206
3207     yaz_log(log_requestdetail, "Got SortRequest.");
3208
3209     bsrr->num_input_setnames = req->num_inputResultSetNames;
3210     for (i=0;i<req->num_inputResultSetNames;i++)
3211         yaz_log(log_requestdetail, "Input resultset: '%s'",
3212                 req->inputResultSetNames[i]);
3213     bsrr->input_setnames = req->inputResultSetNames;
3214     bsrr->referenceId = req->referenceId;
3215     bsrr->output_setname = req->sortedResultSetName;
3216     yaz_log(log_requestdetail, "Output resultset: '%s'",
3217                 req->sortedResultSetName);
3218     bsrr->sort_sequence = req->sortSequence;
3219        /*FIXME - dump those sequences too */
3220     bsrr->stream = assoc->encode;
3221     bsrr->print = assoc->print;
3222
3223     bsrr->sort_status = Z_SortResponse_failure;
3224     bsrr->errcode = 0;
3225     bsrr->errstring = 0;
3226
3227     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3228
3229     res->referenceId = bsrr->referenceId;
3230     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3231     res->resultSetStatus = 0;
3232     if (bsrr->errcode)
3233     {
3234         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3235                                        bsrr->errcode, bsrr->errstring);
3236         res->diagnostics = dr->diagRecs;
3237         res->num_diagnostics = dr->num_diagRecs;
3238     }
3239     else
3240     {
3241         res->num_diagnostics = 0;
3242         res->diagnostics = 0;
3243     }
3244     res->resultCount = 0;
3245     res->otherInfo = 0;
3246
3247     apdu->which = Z_APDU_sortResponse;
3248     apdu->u.sortResponse = res;
3249     if (log_request)
3250     {
3251         WRBUF wr = wrbuf_alloc();
3252         wrbuf_printf(wr, "Sort ");
3253         if (bsrr->errcode)
3254             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3255         else
3256             wrbuf_printf(wr,  "OK -");
3257         wrbuf_printf(wr, " (");
3258         for (i = 0; i<req->num_inputResultSetNames; i++)
3259         {
3260             if (i)
3261                 wrbuf_printf(wr, "+");
3262             wrbuf_puts(wr, req->inputResultSetNames[i]);
3263         }
3264         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3265
3266         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3267         wrbuf_destroy(wr);
3268     }
3269     return apdu;
3270 }
3271
3272 static Z_APDU *process_deleteRequest(association *assoc, request *reqb)
3273 {
3274     int i;
3275     Z_DeleteResultSetRequest *req =
3276         reqb->apdu_request->u.deleteResultSetRequest;
3277     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3278         odr_malloc(assoc->encode, sizeof(*res));
3279     bend_delete_rr *bdrr = (bend_delete_rr *)
3280         odr_malloc(assoc->encode, sizeof(*bdrr));
3281     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3282
3283     yaz_log(log_requestdetail, "Got DeleteRequest.");
3284
3285     bdrr->num_setnames = req->num_resultSetList;
3286     bdrr->setnames = req->resultSetList;
3287     for (i = 0; i<req->num_resultSetList; i++)
3288         yaz_log(log_requestdetail, "resultset: '%s'",
3289                 req->resultSetList[i]);
3290     bdrr->stream = assoc->encode;
3291     bdrr->print = assoc->print;
3292     bdrr->function = odr_int_to_int(*req->deleteFunction);
3293     bdrr->referenceId = req->referenceId;
3294     bdrr->statuses = 0;
3295     if (bdrr->num_setnames > 0)
3296     {
3297         bdrr->statuses = (int*)
3298             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3299                        bdrr->num_setnames);
3300         for (i = 0; i < bdrr->num_setnames; i++)
3301             bdrr->statuses[i] = 0;
3302     }
3303     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3304
3305     res->referenceId = req->referenceId;
3306
3307     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3308
3309     res->deleteListStatuses = 0;
3310     if (bdrr->num_setnames > 0)
3311     {
3312         int i;
3313         res->deleteListStatuses = (Z_ListStatuses *)
3314             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3315         res->deleteListStatuses->num = bdrr->num_setnames;
3316         res->deleteListStatuses->elements =
3317             (Z_ListStatus **)
3318             odr_malloc(assoc->encode,
3319                         sizeof(*res->deleteListStatuses->elements) *
3320                         bdrr->num_setnames);
3321         for (i = 0; i<bdrr->num_setnames; i++)
3322         {
3323             res->deleteListStatuses->elements[i] =
3324                 (Z_ListStatus *)
3325                 odr_malloc(assoc->encode,
3326                             sizeof(**res->deleteListStatuses->elements));
3327             res->deleteListStatuses->elements[i]->status =
3328                 odr_intdup(assoc->encode, bdrr->statuses[i]);
3329             res->deleteListStatuses->elements[i]->id =
3330                 odr_strdup(assoc->encode, bdrr->setnames[i]);
3331         }
3332     }
3333     res->numberNotDeleted = 0;
3334     res->bulkStatuses = 0;
3335     res->deleteMessage = 0;
3336     res->otherInfo = 0;
3337
3338     apdu->which = Z_APDU_deleteResultSetResponse;
3339     apdu->u.deleteResultSetResponse = res;
3340     if (log_request)
3341     {
3342         WRBUF wr = wrbuf_alloc();
3343         wrbuf_printf(wr, "Delete ");
3344         if (bdrr->delete_status)
3345             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3346         else
3347             wrbuf_printf(wr, "OK -");
3348         for (i = 0; i<req->num_resultSetList; i++)
3349             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3350         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3351         wrbuf_destroy(wr);
3352     }
3353     return apdu;
3354 }
3355
3356 static void process_close(association *assoc, request *reqb)
3357 {
3358     Z_Close *req = reqb->apdu_request->u.close;
3359     static char *reasons[] =
3360     {
3361         "finished",
3362         "shutdown",
3363         "systemProblem",
3364         "costLimit",
3365         "resources",
3366         "securityViolation",
3367         "protocolError",
3368         "lackOfActivity",
3369         "peerAbort",
3370         "unspecified"
3371     };
3372
3373     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3374         reasons[*req->closeReason], req->diagnosticInformation ?
3375         req->diagnosticInformation : "NULL");
3376     if (assoc->version < 3) /* to make do_force respond with close */
3377         assoc->version = 3;
3378     do_close_req(assoc, Z_Close_finished,
3379                  "Association terminated by client", reqb);
3380     yaz_log(log_request,"Close OK");
3381 }
3382
3383 static Z_APDU *process_segmentRequest(association *assoc, request *reqb)
3384 {
3385     bend_segment_rr req;
3386
3387     req.segment = reqb->apdu_request->u.segmentRequest;
3388     req.stream = assoc->encode;
3389     req.decode = assoc->decode;
3390     req.print = assoc->print;
3391     req.association = assoc;
3392
3393     (*assoc->init->bend_segment)(assoc->backend, &req);
3394
3395     return 0;
3396 }
3397
3398 static Z_APDU *process_ESRequest(association *assoc, request *reqb)
3399 {
3400     bend_esrequest_rr esrequest;
3401     const char *ext_name = "unknown";
3402
3403     Z_ExtendedServicesRequest *req =
3404         reqb->apdu_request->u.extendedServicesRequest;
3405     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3406
3407     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3408
3409     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3410     esrequest.stream = assoc->encode;
3411     esrequest.decode = assoc->decode;
3412     esrequest.print = assoc->print;
3413     esrequest.errcode = 0;
3414     esrequest.errstring = NULL;
3415     esrequest.association = assoc;
3416     esrequest.taskPackage = 0;
3417     esrequest.referenceId = req->referenceId;
3418
3419     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3420     {
3421         switch(esrequest.esr->taskSpecificParameters->which)
3422         {
3423         case Z_External_itemOrder:
3424             ext_name = "ItemOrder"; break;
3425         case Z_External_update:
3426             ext_name = "Update"; break;
3427         case Z_External_update0:
3428             ext_name = "Update0"; break;
3429         case Z_External_ESAdmin:
3430             ext_name = "Admin"; break;
3431
3432         }
3433     }
3434
3435     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3436
3437     resp->referenceId = req->referenceId;
3438
3439     if (esrequest.errcode == -1)
3440     {
3441         /* Backend service indicates request will be processed */
3442         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3443         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3444     }
3445     else if (esrequest.errcode == 0)
3446     {
3447         /* Backend service indicates request will be processed */
3448         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3449         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3450     }
3451     else
3452     {
3453         Z_DiagRecs *diagRecs =
3454             zget_DiagRecs(assoc->encode, esrequest.errcode,
3455                           esrequest.errstring);
3456         /* Backend indicates error, request will not be processed */
3457         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3458         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3459         resp->num_diagnostics = diagRecs->num_diagRecs;
3460         resp->diagnostics = diagRecs->diagRecs;
3461         if (log_request)
3462         {
3463             WRBUF wr = wrbuf_alloc();
3464             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3465             yaz_log(log_request, "EsRequest %s", wrbuf_cstr(wr) );
3466             wrbuf_destroy(wr);
3467         }
3468
3469     }
3470     /* Do something with the members of bend_extendedservice */
3471     if (esrequest.taskPackage)
3472     {
3473         resp->taskPackage = z_ext_record_oid(
3474             assoc->encode, yaz_oid_recsyn_extended,
3475             (const char *)  esrequest.taskPackage, -1);
3476     }
3477     yaz_log(YLOG_DEBUG,"Send the result apdu");
3478     return apdu;
3479 }
3480
3481 int bend_assoc_is_alive(bend_association assoc)
3482 {
3483     if (assoc->state == ASSOC_DEAD)
3484         return 0; /* already marked as dead. Don't check I/O chan anymore */
3485
3486     return iochan_is_alive(assoc->client_chan);
3487 }
3488
3489
3490 /*
3491  * Local variables:
3492  * c-basic-offset: 4
3493  * c-file-style: "Stroustrup"
3494  * indent-tabs-mode: nil
3495  * End:
3496  * vim: shiftwidth=4 tabstop=8 expandtab
3497  */
3498