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->queryType || !strcmp(srw_req->queryType, "cql"))
 937         {
 938             if (assoc->server && assoc->server->cql_transform)
 939             {
 940                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query,
 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;
 963
 964                 rr.query->which = Z_Query_type_104;
 965                 rr.query->u.type_104 =  ext;
 966             }
 967         }
 968         else if (!strcmp(srw_req->queryType, "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, srw_req->query);
 976             if (!RPNquery)
 977             {
 978                 const char *pqf_msg;
 979                 size_t off;
 980                 int code = yaz_pqf_error(pqf_parser, &pqf_msg, &off);
 981                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 982                         code, pqf_msg, (long) off);
 983                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 984             }
 985
 986             rr.query->which = Z_Query_type_1;
 987             rr.query->u.type_1 =  RPNquery;
 988
 989             yaz_pqf_destroy(pqf_parser);
 990         }
 991         else
 992         {
 993             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 994                                    &srw_res->num_diagnostics,
 995                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 996         }
 997         if (rr.query->u.type_1)
 998         {
 999             rr.stream = assoc->encode;
1000             rr.decode = assoc->decode;
1001             rr.print = assoc->print;
1002             if (srw_req->sort.sortKeys)
1003                 rr.srw_sortKeys = odr_strdup(assoc->encode,
1004                                              srw_req->sort.sortKeys);
1005             rr.association = assoc;
1006             rr.hits = 0;
1007             rr.errcode = 0;
1008             rr.errstring = 0;
1009             rr.search_info = 0;
1010             rr.search_input = 0;
1011             yaz_log_zquery_level(log_requestdetail,rr.query);
1012
1013             (assoc->init->bend_search)(assoc->backend, &rr);
1014             if (rr.errcode)
1015             {
1016                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1017                 {
1018                     *http_code = 404;
1019                 }
1020                 else
1021                 {
1022                     srw_error = yaz_diag_bib1_to_srw(rr.errcode);
1023                     yaz_add_srw_diagnostic(assoc->encode,
1024                                            &srw_res->diagnostics,
1025                                            &srw_res->num_diagnostics,
1026                                            srw_error, rr.errstring);
1027                 }
1028             }
1029             else
1030             {
1031                 int number = srw_req->maximumRecords ?
1032                     odr_int_to_int(*srw_req->maximumRecords) : 0;
1033                 int start = srw_req->startRecord ?
1034                     odr_int_to_int(*srw_req->startRecord) : 1;
1035
1036                 yaz_log(log_requestdetail, "Request to pack %d+%d out of "
1037                         ODR_INT_PRINTF,
1038                         start, number, rr.hits);
1039
1040                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
1041                 if (rr.srw_setname)
1042                 {
1043                     srw_res->resultSetId =
1044                         odr_strdup(assoc->encode, rr.srw_setname );
1045                     srw_res->resultSetIdleTime =
1046                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
1047                 }
1048
1049                 if (start > rr.hits || start < 1)
1050                 {
1051                     /* if hits<=0 and start=1 we don't return a diagnostic */
1052                     if (start != 1)
1053                         yaz_add_srw_diagnostic(
1054                             assoc->encode,
1055                             &srw_res->diagnostics, &srw_res->num_diagnostics,
1056                             YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1057                 }
1058                 else if (number > 0)
1059                 {
1060                     int i;
1061                     int ok = 1;
1062                     if (start + number > rr.hits)
1063                         number = odr_int_to_int(rr.hits) - start + 1;
1064
1065                     /* Call bend_present if defined */
1066                     if (assoc->init->bend_present)
1067                     {
1068                         bend_present_rr *bprr = (bend_present_rr*)
1069                             odr_malloc(assoc->decode, sizeof(*bprr));
1070                         bprr->setname = "default";
1071                         bprr->start = start;
1072                         bprr->number = number;
1073                         if (srw_req->recordSchema)
1074                         {
1075                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1076                                                                             sizeof(*bprr->comp));
1077                             bprr->comp->which = Z_RecordComp_simple;
1078                             bprr->comp->u.simple = (Z_ElementSetNames *)
1079                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1080                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1081                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1082                         }
1083                         else
1084                         {
1085                             bprr->comp = 0;
1086                         }
1087                         bprr->stream = assoc->encode;
1088                         bprr->referenceId = 0;
1089                         bprr->print = assoc->print;
1090                         bprr->association = assoc;
1091                         bprr->errcode = 0;
1092                         bprr->errstring = NULL;
1093                         (*assoc->init->bend_present)(assoc->backend, bprr);
1094
1095                         if (bprr->errcode)
1096                         {
1097                             srw_error = yaz_diag_bib1_to_srw(bprr->errcode);
1098                             yaz_add_srw_diagnostic(assoc->encode,
1099                                                    &srw_res->diagnostics,
1100                                                    &srw_res->num_diagnostics,
1101                                                    srw_error, bprr->errstring);
1102                             ok = 0;
1103                         }
1104                     }
1105
1106                     if (ok)
1107                     {
1108                         int j = 0;
1109                         int packing = Z_SRW_recordPacking_string;
1110                         if (srw_req->recordPacking)
1111                         {
1112                             packing =
1113                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1114                             if (packing == -1)
1115                                 packing = Z_SRW_recordPacking_string;
1116                         }
1117                         srw_res->records = (Z_SRW_record *)
1118                             odr_malloc(assoc->encode,
1119                                        number * sizeof(*srw_res->records));
1120
1121                         srw_res->extra_records = (Z_SRW_extra_record **)
1122                             odr_malloc(assoc->encode,
1123                                        number*sizeof(*srw_res->extra_records));
1124
1125                         for (i = 0; i<number; i++)
1126                         {
1127                             int errcode;
1128                             int last_in_set = 0;
1129                             const char *addinfo = 0;
1130
1131                             srw_res->records[j].recordPacking = packing;
1132                             srw_res->records[j].recordData_buf = 0;
1133                             srw_res->extra_records[j] = 0;
1134                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1135                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1136                                                      srw_res->records + j,
1137                                                      &addinfo, &last_in_set);
1138                             if (errcode)
1139                             {
1140                                 yaz_add_srw_diagnostic(assoc->encode,
1141                                                        &srw_res->diagnostics,
1142                                                        &srw_res->num_diagnostics,
1143                                                        yaz_diag_bib1_to_srw(errcode),
1144                                                        addinfo);
1145
1146                                 break;
1147                             }
1148                             if (srw_res->records[j].recordData_buf)
1149                                 j++;
1150                             if (last_in_set)
1151                                 break;
1152                         }
1153                         srw_res->num_records = j;
1154                         if (!j)
1155                             srw_res->records = 0;
1156                     }
1157                 }
1158                 if (rr.extra_response_data)
1159                 {
1160                     res->extraResponseData_buf = rr.extra_response_data;
1161                     res->extraResponseData_len = strlen(rr.extra_response_data);
1162                 }
1163                 if (rr.estimated_hit_count || rr.partial_resultset)
1164                 {
1165                     yaz_add_srw_diagnostic(
1166                         assoc->encode,
1167                         &srw_res->diagnostics,
1168                         &srw_res->num_diagnostics,
1169                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1170                         0);
1171                 }
1172             }
1173         }
1174     }
1175     if (log_request)
1176     {
1177         WRBUF wr = wrbuf_alloc();
1178
1179         wrbuf_printf(wr, "SRWSearch %s ", srw_req->database);
1180         if (srw_res->num_diagnostics)
1181             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1182         else if (*http_code != 200)
1183             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1184         else if (srw_res->numberOfRecords)
1185         {
1186             wrbuf_printf(wr, "OK " ODR_INT_PRINTF,
1187                          (srw_res->numberOfRecords ?
1188                           *srw_res->numberOfRecords : 0));
1189         }
1190         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+%d",
1191                      (srw_res->resultSetId ?
1192                       srw_res->resultSetId : "-"),
1193                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1194                      srw_res->num_records);
1195         yaz_log(log_request, "%s %s: %s", wrbuf_cstr(wr), srw_req->queryType,
1196                 srw_req->query);
1197         wrbuf_destroy(wr);
1198     }
1199 }
1200
1201 static char *srw_bend_explain_default(bend_explain_rr *rr)
1202 {
1203 #if YAZ_HAVE_XML2
1204     xmlNodePtr ptr = (xmlNode *) rr->server_node_ptr;
1205     if (!ptr)
1206         return 0;
1207     for (ptr = ptr->children; ptr; ptr = ptr->next)
1208     {
1209         if (ptr->type != XML_ELEMENT_NODE)
1210             continue;
1211         if (!strcmp((const char *) ptr->name, "explain"))
1212         {
1213             int len;
1214             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1215             xmlChar *buf_out;
1216             char *content;
1217
1218             ptr = xmlCopyNode(ptr, 1);
1219
1220             xmlDocSetRootElement(doc, ptr);
1221
1222             xmlDocDumpMemory(doc, &buf_out, &len);
1223             content = (char*) odr_malloc(rr->stream, 1+len);
1224             memcpy(content, buf_out, len);
1225             content[len] = '\0';
1226
1227             xmlFree(buf_out);
1228             xmlFreeDoc(doc);
1229             rr->explain_buf = content;
1230             return 0;
1231         }
1232     }
1233 #endif
1234     return 0;
1235 }
1236
1237 static void srw_bend_explain(association *assoc,
1238                              Z_SRW_PDU *sr,
1239                              Z_SRW_explainResponse *srw_res,
1240                              int *http_code)
1241 {
1242     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1243     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1244     *http_code = 404;
1245     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1246     if (assoc->init)
1247     {
1248         bend_explain_rr rr;
1249
1250         rr.stream = assoc->encode;
1251         rr.decode = assoc->decode;
1252         rr.print = assoc->print;
1253         rr.explain_buf = 0;
1254         rr.database = srw_req->database;
1255         if (assoc->server)
1256             rr.server_node_ptr = assoc->server->server_node_ptr;
1257         else
1258             rr.server_node_ptr = 0;
1259         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1260         if (assoc->init->bend_explain)
1261             (*assoc->init->bend_explain)(assoc->backend, &rr);
1262         else
1263             srw_bend_explain_default(&rr);
1264
1265         if (rr.explain_buf)
1266         {
1267             int packing = Z_SRW_recordPacking_string;
1268             if (srw_req->recordPacking)
1269             {
1270                 packing =
1271                     yaz_srw_str_to_pack(srw_req->recordPacking);
1272                 if (packing == -1)
1273                     packing = Z_SRW_recordPacking_string;
1274             }
1275             srw_res->record.recordSchema = rr.schema;
1276             srw_res->record.recordPacking = packing;
1277             srw_res->record.recordData_buf = rr.explain_buf;
1278             srw_res->record.recordData_len = strlen(rr.explain_buf);
1279             srw_res->record.recordPosition = 0;
1280             *http_code = 200;
1281         }
1282     }
1283 }
1284
1285 static void srw_bend_scan(association *assoc,
1286                           Z_SRW_PDU *sr,
1287                           Z_SRW_PDU *res,
1288                           int *http_code)
1289 {
1290     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1291     Z_SRW_scanResponse *srw_res = res->u.scan_response;
1292     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1293
1294     *http_code = 200;
1295     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1296     if (srw_res->num_diagnostics == 0 && assoc->init)
1297     {
1298         int step_size = 0;
1299         struct scan_entry *save_entries;
1300
1301         bend_scan_rr *bsrr = (bend_scan_rr *)
1302             odr_malloc(assoc->encode, sizeof(*bsrr));
1303         bsrr->num_bases = 1;
1304         bsrr->basenames = &srw_req->database;
1305
1306         bsrr->num_entries = srw_req->maximumTerms ?
1307             odr_int_to_int(*srw_req->maximumTerms) : 10;
1308         bsrr->term_position = srw_req->responsePosition ?
1309             odr_int_to_int(*srw_req->responsePosition) : 1;
1310
1311         bsrr->errcode = 0;
1312         bsrr->errstring = 0;
1313         bsrr->referenceId = 0;
1314         bsrr->stream = assoc->encode;
1315         bsrr->print = assoc->print;
1316         bsrr->step_size = &step_size;
1317         bsrr->entries = 0;
1318         bsrr->setname = 0;
1319         bsrr->extra_args = sr->extra_args;
1320         bsrr->extra_response_data = 0;
1321
1322         if (bsrr->num_entries > 0)
1323         {
1324             int i;
1325             bsrr->entries = (struct scan_entry *)
1326                 odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1327                            bsrr->num_entries);
1328             for (i = 0; i<bsrr->num_entries; i++)
1329             {
1330                 bsrr->entries[i].term = 0;
1331                 bsrr->entries[i].occurrences = 0;
1332                 bsrr->entries[i].errcode = 0;
1333                 bsrr->entries[i].errstring = 0;
1334                 bsrr->entries[i].display_term = 0;
1335             }
1336         }
1337         save_entries = bsrr->entries;  /* save it so we can compare later */
1338
1339         if (srw_req->queryType && !strcmp(srw_req->queryType, "pqf") &&
1340             assoc->init->bend_scan)
1341         {
1342             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1343
1344             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1345                                       &bsrr->attributeset,
1346                                       srw_req->scanClause);
1347             yaz_pqf_destroy(pqf_parser);
1348             bsrr->scanClause = 0;
1349             ((int (*)(void *, bend_scan_rr *))
1350              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1351         }
1352         else if ((!srw_req->queryType || !strcmp(srw_req->queryType, "cql"))
1353                  && assoc->init->bend_scan && assoc->server
1354                  && assoc->server->cql_transform)
1355         {
1356             int srw_error;
1357             bsrr->scanClause = 0;
1358             bsrr->attributeset = 0;
1359             bsrr->term = (Z_AttributesPlusTerm *)
1360                 odr_malloc(assoc->decode, sizeof(*bsrr->term));
1361             srw_error = cql2pqf_scan(assoc->encode,
1362                                      srw_req->scanClause,
1363                                      assoc->server->cql_transform,
1364                                      bsrr->term);
1365             if (srw_error)
1366                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1367                                        &srw_res->num_diagnostics,
1368                                        srw_error, 0);
1369             else
1370             {
1371                 ((int (*)(void *, bend_scan_rr *))
1372                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1373             }
1374         }
1375         else if ((!srw_req->queryType || !strcmp(srw_req->queryType, "cql"))
1376                  && assoc->init->bend_srw_scan)
1377         {
1378             bsrr->term = 0;
1379             bsrr->attributeset = 0;
1380             bsrr->scanClause = srw_req->scanClause;
1381             ((int (*)(void *, bend_scan_rr *))
1382              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1383         }
1384         else
1385         {
1386             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1387                                    &srw_res->num_diagnostics,
1388                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1389         }
1390         if (bsrr->extra_response_data)
1391         {
1392             res->extraResponseData_buf = bsrr->extra_response_data;
1393             res->extraResponseData_len = strlen(bsrr->extra_response_data);
1394         }
1395         if (bsrr->errcode)
1396         {
1397             int srw_error;
1398             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1399             {
1400                 *http_code = 404;
1401                 return;
1402             }
1403             srw_error = yaz_diag_bib1_to_srw(bsrr->errcode);
1404
1405             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1406                                    &srw_res->num_diagnostics,
1407                                    srw_error, bsrr->errstring);
1408         }
1409         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1410         {
1411             int i;
1412             srw_res->terms = (Z_SRW_scanTerm*)
1413                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1414                            bsrr->num_entries);
1415
1416             srw_res->num_terms =  bsrr->num_entries;
1417             for (i = 0; i<bsrr->num_entries; i++)
1418             {
1419                 Z_SRW_scanTerm *t = srw_res->terms + i;
1420                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1421                 t->numberOfRecords =
1422                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1423                 t->displayTerm = 0;
1424                 if (save_entries == bsrr->entries &&
1425                     bsrr->entries[i].display_term)
1426                 {
1427                     /* the entries was _not_ set by the handler. So it's
1428                        safe to test for new member display_term. It is
1429                        NULL'ed by us.
1430                     */
1431                     t->displayTerm = odr_strdup(assoc->encode,
1432                                                 bsrr->entries[i].display_term);
1433                 }
1434                 t->whereInList = 0;
1435             }
1436         }
1437     }
1438     if (log_request)
1439     {
1440         WRBUF wr = wrbuf_alloc();
1441         wrbuf_printf(wr, "SRWScan %s ", srw_req->database);
1442
1443         if (srw_res->num_diagnostics)
1444             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1445         else if (srw_res->num_terms)
1446             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1447         else
1448             wrbuf_printf(wr, "OK - - ");
1449
1450         wrbuf_printf(wr, ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
1451                      (srw_req->responsePosition ?
1452                       *srw_req->responsePosition : 1),
1453                      (srw_req->maximumTerms ?
1454                       *srw_req->maximumTerms : 1));
1455         /* there is no step size in SRU/W ??? */
1456         wrbuf_printf(wr, "%s: %s ", srw_req->queryType, srw_req->scanClause);
1457         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1458         wrbuf_destroy(wr);
1459     }
1460
1461 }
1462
1463 static void srw_bend_update(association *assoc,
1464                             Z_SRW_PDU *sr,
1465                             Z_SRW_updateResponse *srw_res,
1466                             int *http_code)
1467 {
1468     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1469     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1470     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1471     *http_code = 404;
1472     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1473     if (assoc->init)
1474     {
1475         bend_update_rr rr;
1476         Z_SRW_extra_record *extra = srw_req->extra_record;
1477
1478         rr.stream = assoc->encode;
1479         rr.print = assoc->print;
1480         rr.num_bases = 1;
1481         rr.basenames = &srw_req->database;
1482         rr.operation = srw_req->operation;
1483         rr.operation_status = "failed";
1484         rr.record_id = 0;
1485         rr.record_versions = 0;
1486         rr.num_versions = 0;
1487         rr.record_packing = "string";
1488         rr.record_schema = 0;
1489         rr.record_data = 0;
1490         rr.extra_record_data = 0;
1491         rr.extra_request_data = 0;
1492         rr.extra_response_data = 0;
1493         rr.uri = 0;
1494         rr.message = 0;
1495         rr.details = 0;
1496
1497         *http_code = 200;
1498         if (rr.operation == 0)
1499         {
1500             yaz_add_sru_update_diagnostic(
1501                 assoc->encode, &srw_res->diagnostics,
1502                 &srw_res->num_diagnostics,
1503                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1504                 "action" );
1505             return;
1506         }
1507         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1508         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1509         if (!strcmp( rr.operation, "delete"))
1510         {
1511             if (srw_req->record && !srw_req->record->recordSchema)
1512             {
1513                 rr.record_schema = odr_strdup(
1514                     assoc->encode,
1515                     srw_req->record->recordSchema);
1516             }
1517             if (srw_req->record)
1518             {
1519                 rr.record_data = odr_strdupn(
1520                     assoc->encode,
1521                     srw_req->record->recordData_buf,
1522                     srw_req->record->recordData_len );
1523             }
1524             if (extra && extra->extraRecordData_len)
1525             {
1526                 rr.extra_record_data = odr_strdupn(
1527                     assoc->encode,
1528                     extra->extraRecordData_buf,
1529                     extra->extraRecordData_len );
1530             }
1531             if (srw_req->recordId)
1532                 rr.record_id = srw_req->recordId;
1533             else if (extra && extra->recordIdentifier)
1534                 rr.record_id = extra->recordIdentifier;
1535         }
1536         else if (!strcmp(rr.operation, "replace"))
1537         {
1538             if (srw_req->recordId)
1539                 rr.record_id = srw_req->recordId;
1540             else if (extra && extra->recordIdentifier)
1541                 rr.record_id = extra->recordIdentifier;
1542             else
1543             {
1544                 yaz_add_sru_update_diagnostic(
1545                     assoc->encode, &srw_res->diagnostics,
1546                     &srw_res->num_diagnostics,
1547                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1548                     "recordIdentifier");
1549             }
1550             if (!srw_req->record)
1551             {
1552                 yaz_add_sru_update_diagnostic(
1553                     assoc->encode, &srw_res->diagnostics,
1554                     &srw_res->num_diagnostics,
1555                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1556                     "record");
1557             }
1558             else
1559             {
1560                 if (srw_req->record->recordSchema)
1561                     rr.record_schema = odr_strdup(
1562                         assoc->encode, srw_req->record->recordSchema);
1563                 if (srw_req->record->recordData_len )
1564                 {
1565                     rr.record_data = odr_strdupn(assoc->encode,
1566                                                  srw_req->record->recordData_buf,
1567                                                  srw_req->record->recordData_len );
1568                 }
1569                 else
1570                 {
1571                     yaz_add_sru_update_diagnostic(
1572                         assoc->encode, &srw_res->diagnostics,
1573                         &srw_res->num_diagnostics,
1574                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1575                         "recordData" );
1576                 }
1577             }
1578             if (extra && extra->extraRecordData_len)
1579             {
1580                 rr.extra_record_data = odr_strdupn(
1581                     assoc->encode,
1582                     extra->extraRecordData_buf,
1583                     extra->extraRecordData_len );
1584             }
1585         }
1586         else if (!strcmp(rr.operation, "insert"))
1587         {
1588             if (srw_req->recordId)
1589                 rr.record_id = srw_req->recordId;
1590             else if (extra)
1591                 rr.record_id = extra->recordIdentifier;
1592
1593             if (srw_req->record)
1594             {
1595                 if (srw_req->record->recordSchema)
1596                     rr.record_schema = odr_strdup(
1597                         assoc->encode, srw_req->record->recordSchema);
1598
1599                 if (srw_req->record->recordData_len)
1600                     rr.record_data = odr_strdupn(
1601                         assoc->encode,
1602                         srw_req->record->recordData_buf,
1603                         srw_req->record->recordData_len );
1604             }
1605             if (extra && extra->extraRecordData_len)
1606             {
1607                 rr.extra_record_data = odr_strdupn(
1608                     assoc->encode,
1609                     extra->extraRecordData_buf,
1610                     extra->extraRecordData_len );
1611             }
1612         }
1613         else
1614             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1615                                           &srw_res->num_diagnostics,
1616                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1617                                           rr.operation );
1618
1619         if (srw_req->record)
1620         {
1621             const char *pack_str =
1622                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1623             if (pack_str)
1624                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1625         }
1626
1627         if (srw_req->num_recordVersions)
1628         {
1629             rr.record_versions = srw_req->recordVersions;
1630             rr.num_versions = srw_req->num_recordVersions;
1631         }
1632         if (srw_req->extraRequestData_len)
1633         {
1634             rr.extra_request_data = odr_strdupn(assoc->encode,
1635                                                 srw_req->extraRequestData_buf,
1636                                                 srw_req->extraRequestData_len );
1637         }
1638         if (srw_res->num_diagnostics == 0)
1639         {
1640             if ( assoc->init->bend_srw_update)
1641                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1642             else
1643                 yaz_add_sru_update_diagnostic(
1644                     assoc->encode, &srw_res->diagnostics,
1645                     &srw_res->num_diagnostics,
1646                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1647                     "No Update backend handler");
1648         }
1649
1650         if (rr.uri)
1651             yaz_add_srw_diagnostic_uri(assoc->encode,
1652                                        &srw_res->diagnostics,
1653                                        &srw_res->num_diagnostics,
1654                                        rr.uri,
1655                                        rr.message,
1656                                        rr.details);
1657         srw_res->recordId = rr.record_id;
1658         srw_res->operationStatus = rr.operation_status;
1659         srw_res->recordVersions = rr.record_versions;
1660         srw_res->num_recordVersions = rr.num_versions;
1661         if (srw_res->extraResponseData_len)
1662         {
1663             srw_res->extraResponseData_buf = rr.extra_response_data;
1664             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1665         }
1666         if (srw_res->num_diagnostics == 0 && rr.record_data)
1667         {
1668             srw_res->record = yaz_srw_get_record(assoc->encode);
1669             srw_res->record->recordSchema = rr.record_schema;
1670             if (rr.record_packing)
1671             {
1672                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1673
1674                 if (pack == -1)
1675                 {
1676                     pack = Z_SRW_recordPacking_string;
1677                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1678                             rr.record_packing);
1679                 }
1680                 srw_res->record->recordPacking = pack;
1681             }
1682             srw_res->record->recordData_buf = rr.record_data;
1683             srw_res->record->recordData_len = strlen(rr.record_data);
1684             if (rr.extra_record_data)
1685             {
1686                 Z_SRW_extra_record *ex =
1687                     yaz_srw_get_extra_record(assoc->encode);
1688                 srw_res->extra_record = ex;
1689                 ex->extraRecordData_buf = rr.extra_record_data;
1690                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1691             }
1692         }
1693     }
1694 }
1695
1696 /* check if path is OK (1); BAD (0) */
1697 static int check_path(const char *path)
1698 {
1699     if (*path != '/')
1700         return 0;
1701     if (strstr(path, ".."))
1702         return 0;
1703     return 1;
1704 }
1705
1706 static char *read_file(const char *fname, ODR o, size_t *sz)
1707 {
1708     char *buf;
1709     FILE *inf = fopen(fname, "rb");
1710     if (!inf)
1711         return 0;
1712
1713     fseek(inf, 0L, SEEK_END);
1714     *sz = ftell(inf);
1715     rewind(inf);
1716     buf = (char *) odr_malloc(o, *sz);
1717     if (fread(buf, 1, *sz, inf) != *sz)
1718         yaz_log(YLOG_WARN|YLOG_ERRNO, "short read %s", fname);
1719     fclose(inf);
1720     return buf;
1721 }
1722
1723 static void process_http_request(association *assoc, request *req)
1724 {
1725     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1726     ODR o = assoc->encode;
1727     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1728     Z_SRW_PDU *sr = 0;
1729     Z_SOAP *soap_package = 0;
1730     Z_GDU *p = 0;
1731     char *charset = 0;
1732     Z_HTTP_Response *hres = 0;
1733     int keepalive = 1;
1734     const char *stylesheet = 0; /* for now .. set later */
1735     Z_SRW_diagnostic *diagnostic = 0;
1736     int num_diagnostic = 0;
1737     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1738
1739     yaz_log(log_request, "%s %s HTTP/%s", hreq->method, hreq->path, hreq->version);
1740     if (!control_association(assoc, host, 0))
1741     {
1742         p = z_get_HTTP_Response(o, 404);
1743         r = 1;
1744     }
1745     if (r == 2 && assoc->server && assoc->server->docpath
1746         && hreq->path[0] == '/'
1747         &&
1748         /* check if path is a proper prefix of documentroot */
1749         strncmp(hreq->path+1, assoc->server->docpath,
1750                 strlen(assoc->server->docpath))
1751         == 0)
1752     {
1753         if (!check_path(hreq->path))
1754         {
1755             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1756             p = z_get_HTTP_Response(o, 404);
1757         }
1758         else
1759         {
1760             size_t content_size = 0;
1761             char *content_buf = read_file(hreq->path+1, o, &content_size);
1762             if (!content_buf)
1763             {
1764                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1765                 p = z_get_HTTP_Response(o, 404);
1766             }
1767             else
1768             {
1769                 const char *ctype = 0;
1770                 yaz_mime_types types = yaz_mime_types_create();
1771
1772                 yaz_mime_types_add(types, "xsl", "application/xml");
1773                 yaz_mime_types_add(types, "xml", "application/xml");
1774                 yaz_mime_types_add(types, "css", "text/css");
1775                 yaz_mime_types_add(types, "html", "text/html");
1776                 yaz_mime_types_add(types, "htm", "text/html");
1777                 yaz_mime_types_add(types, "txt", "text/plain");
1778                 yaz_mime_types_add(types, "js", "application/x-javascript");
1779
1780                 yaz_mime_types_add(types, "gif", "image/gif");
1781                 yaz_mime_types_add(types, "png", "image/png");
1782                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1783                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1784
1785                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1786                 if (!ctype)
1787                 {
1788                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1789                     p = z_get_HTTP_Response(o, 404);
1790                 }
1791                 else
1792                 {
1793                     p = z_get_HTTP_Response(o, 200);
1794                     hres = p->u.HTTP_Response;
1795                     hres->content_buf = content_buf;
1796                     hres->content_len = content_size;
1797                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1798                 }
1799                 yaz_mime_types_destroy(types);
1800             }
1801         }
1802         r = 1;
1803     }
1804
1805     if (r == 2)
1806     {
1807         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1808         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1809     }
1810     if (r == 2)  /* not taken */
1811     {
1812         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1813                            &diagnostic, &num_diagnostic);
1814         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1815     }
1816     if (r == 0)  /* decode SRW/SRU OK .. */
1817     {
1818         int http_code = 200;
1819         if (sr->which == Z_SRW_searchRetrieve_request)
1820         {
1821             Z_SRW_PDU *res =
1822                 yaz_srw_get_pdu(assoc->encode, Z_SRW_searchRetrieve_response,
1823                                 sr->srw_version);
1824             stylesheet = sr->u.request->stylesheet;
1825             if (num_diagnostic)
1826             {
1827                 res->u.response->diagnostics = diagnostic;
1828                 res->u.response->num_diagnostics = num_diagnostic;
1829             }
1830             else
1831             {
1832                 srw_bend_search(assoc, sr, res, &http_code);
1833             }
1834             if (http_code == 200)
1835                 soap_package->u.generic->p = res;
1836         }
1837         else if (sr->which == Z_SRW_explain_request)
1838         {
1839             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_explain_response,
1840                                              sr->srw_version);
1841             stylesheet = sr->u.explain_request->stylesheet;
1842             if (num_diagnostic)
1843             {
1844                 res->u.explain_response->diagnostics = diagnostic;
1845                 res->u.explain_response->num_diagnostics = num_diagnostic;
1846             }
1847             srw_bend_explain(assoc, sr, res->u.explain_response, &http_code);
1848             if (http_code == 200)
1849                 soap_package->u.generic->p = res;
1850         }
1851         else if (sr->which == Z_SRW_scan_request)
1852         {
1853             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_scan_response,
1854                                              sr->srw_version);
1855             stylesheet = sr->u.scan_request->stylesheet;
1856             if (num_diagnostic)
1857             {
1858                 res->u.scan_response->diagnostics = diagnostic;
1859                 res->u.scan_response->num_diagnostics = num_diagnostic;
1860             }
1861             srw_bend_scan(assoc, sr, res, &http_code);
1862             if (http_code == 200)
1863                 soap_package->u.generic->p = res;
1864         }
1865         else if (sr->which == Z_SRW_update_request)
1866         {
1867             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_update_response,
1868                                              sr->srw_version);
1869             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1870             if (num_diagnostic)
1871             {
1872                 res->u.update_response->diagnostics = diagnostic;
1873                 res->u.update_response->num_diagnostics = num_diagnostic;
1874             }
1875             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1876             srw_bend_update(assoc, sr, res->u.update_response, &http_code);
1877             if (http_code == 200)
1878                 soap_package->u.generic->p = res;
1879         }
1880         else
1881         {
1882             yaz_log(log_request, "SOAP ERROR");
1883             /* FIXME - what error, what query */
1884             http_code = 500;
1885             z_soap_error(assoc->encode, soap_package,
1886                          "SOAP-ENV:Client", "Bad method", 0);
1887         }
1888         if (http_code == 200 || http_code == 500)
1889         {
1890             static Z_SOAP_Handler soap_handlers[4] = {
1891 #if YAZ_HAVE_XML2
1892                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1893                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1894                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1895 #endif
1896                 {0, 0, 0}
1897             };
1898             char ctype[80];
1899             p = z_get_HTTP_Response(o, 200);
1900             hres = p->u.HTTP_Response;
1901
1902             if (!stylesheet && assoc->server)
1903                 stylesheet = assoc->server->stylesheet;
1904
1905             /* empty stylesheet means NO stylesheet */
1906             if (stylesheet && *stylesheet == '\0')
1907                 stylesheet = 0;
1908
1909             z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1910                                  &hres->content_buf, &hres->content_len,
1911                                  soap_handlers, charset, stylesheet);
1912             hres->code = http_code;
1913
1914             strcpy(ctype, "text/xml");
1915             if (charset && strlen(charset) < sizeof(ctype)-30)
1916             {
1917                 strcat(ctype, "; charset=");
1918                 strcat(ctype, charset);
1919             }
1920             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1921         }
1922         else
1923             p = z_get_HTTP_Response(o, http_code);
1924     }
1925
1926     if (p == 0)
1927         p = z_get_HTTP_Response(o, 500);
1928     hres = p->u.HTTP_Response;
1929     if (!strcmp(hreq->version, "1.0"))
1930     {
1931         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1932         if (v && !strcmp(v, "Keep-Alive"))
1933             keepalive = 1;
1934         else
1935             keepalive = 0;
1936         hres->version = "1.0";
1937     }
1938     else
1939     {
1940         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1941         if (v && !strcmp(v, "close"))
1942             keepalive = 0;
1943         else
1944             keepalive = 1;
1945         hres->version = "1.1";
1946     }
1947     if (!keepalive || !assoc->last_control->keepalive)
1948     {
1949         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1950         assoc->state = ASSOC_DEAD;
1951         assoc->cs_get_mask = 0;
1952     }
1953     else
1954     {
1955         int t;
1956         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1957
1958         if (alive && yaz_isdigit(*(const unsigned char *) alive))
1959             t = atoi(alive);
1960         else
1961             t = 15;
1962         if (t < 0 || t > 3600)
1963             t = 3600;
1964         iochan_settimeout(assoc->client_chan,t);
1965         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1966     }
1967     process_gdu_response(assoc, req, p);
1968 }
1969
1970 static void process_gdu_request(association *assoc, request *req)
1971 {
1972     if (req->gdu_request->which == Z_GDU_Z3950)
1973     {
1974         char *msg = 0;
1975         req->apdu_request = req->gdu_request->u.z3950;
1976         if (process_z_request(assoc, req, &msg) < 0)
1977             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1978     }
1979     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1980         process_http_request(assoc, req);
1981     else
1982     {
1983         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1984     }
1985 }
1986
1987 /*
1988  * Initiate request processing.
1989  */
1990 static int process_z_request(association *assoc, request *req, char **msg)
1991 {
1992     Z_APDU *res;
1993     int retval;
1994
1995     *msg = "Unknown Error";
1996     assert(req && req->state == REQUEST_IDLE);
1997     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1998     {
1999         *msg = "Missing InitRequest";
2000         return -1;
2001     }
2002     switch (req->apdu_request->which)
2003     {
2004     case Z_APDU_initRequest:
2005         res = process_initRequest(assoc, req); break;
2006     case Z_APDU_searchRequest:
2007         res = process_searchRequest(assoc, req); break;
2008     case Z_APDU_presentRequest:
2009         res = process_presentRequest(assoc, req); break;
2010     case Z_APDU_scanRequest:
2011         if (assoc->init->bend_scan)
2012             res = process_scanRequest(assoc, req);
2013         else
2014         {
2015             *msg = "Cannot handle Scan APDU";
2016             return -1;
2017         }
2018         break;
2019     case Z_APDU_extendedServicesRequest:
2020         if (assoc->init->bend_esrequest)
2021             res = process_ESRequest(assoc, req);
2022         else
2023         {
2024             *msg = "Cannot handle Extended Services APDU";
2025             return -1;
2026         }
2027         break;
2028     case Z_APDU_sortRequest:
2029         if (assoc->init->bend_sort)
2030             res = process_sortRequest(assoc, req);
2031         else
2032         {
2033             *msg = "Cannot handle Sort APDU";
2034             return -1;
2035         }
2036         break;
2037     case Z_APDU_close:
2038         process_close(assoc, req);
2039         return 0;
2040     case Z_APDU_deleteResultSetRequest:
2041         if (assoc->init->bend_delete)
2042             res = process_deleteRequest(assoc, req);
2043         else
2044         {
2045             *msg = "Cannot handle Delete APDU";
2046             return -1;
2047         }
2048         break;
2049     case Z_APDU_segmentRequest:
2050         if (assoc->init->bend_segment)
2051         {
2052             res = process_segmentRequest(assoc, req);
2053         }
2054         else
2055         {
2056             *msg = "Cannot handle Segment APDU";
2057             return -1;
2058         }
2059         break;
2060     case Z_APDU_triggerResourceControlRequest:
2061         return 0;
2062     default:
2063         *msg = "Bad APDU received";
2064         return -1;
2065     }
2066     if (res)
2067     {
2068         yaz_log(YLOG_DEBUG, "  result immediately available");
2069         retval = process_z_response(assoc, req, res);
2070     }
2071     else
2072     {
2073         yaz_log(YLOG_DEBUG, "  result unavailable");
2074         retval = -1;
2075     }
2076     return retval;
2077 }
2078
2079 /*
2080  * Encode response, and transfer the request structure to the outgoing queue.
2081  */
2082 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2083 {
2084     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2085
2086     if (assoc->print)
2087     {
2088         if (!z_GDU(assoc->print, &res, 0, 0))
2089             yaz_log(YLOG_WARN, "ODR print error: %s",
2090                 odr_errmsg(odr_geterror(assoc->print)));
2091         odr_reset(assoc->print);
2092     }
2093     if (!z_GDU(assoc->encode, &res, 0, 0))
2094     {
2095         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2096                 odr_errmsg(odr_geterror(assoc->decode)),
2097                 odr_getelement(assoc->decode));
2098         return -1;
2099     }
2100     req->response = odr_getbuf(assoc->encode, &req->len_response,
2101         &req->size_response);
2102     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2103     odr_reset(assoc->encode);
2104     req->state = REQUEST_IDLE;
2105     request_enq(&assoc->outgoing, req);
2106     /* turn the work over to the ir_session handler */
2107     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2108     assoc->cs_put_mask = EVENT_OUTPUT;
2109     /* Is there more work to be done? give that to the input handler too */
2110     for (;;)
2111     {
2112         req = request_head(&assoc->incoming);
2113         if (req && req->state == REQUEST_IDLE)
2114         {
2115             request_deq(&assoc->incoming);
2116             process_gdu_request(assoc, req);
2117         }
2118         else
2119             break;
2120     }
2121     return 0;
2122 }
2123
2124 /*
2125  * Encode response, and transfer the request structure to the outgoing queue.
2126  */
2127 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2128 {
2129     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*gres));
2130     gres->which = Z_GDU_Z3950;
2131     gres->u.z3950 = res;
2132
2133     return process_gdu_response(assoc, req, gres);
2134 }
2135
2136 static char *get_vhost(Z_OtherInformation *otherInfo)
2137 {
2138     return yaz_oi_get_string_oid(&otherInfo, yaz_oid_userinfo_proxy, 1, 0);
2139 }
2140
2141 /*
2142  * Handle init request.
2143  * At the moment, we don't check the options
2144  * anywhere else in the code - we just try not to do anything that would
2145  * break a naive client. We'll toss 'em into the association block when
2146  * we need them there.
2147  */
2148 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2149 {
2150     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2151     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2152     Z_InitResponse *resp = apdu->u.initResponse;
2153     bend_initresult *binitres;
2154     char options[140];
2155     statserv_options_block *cb = 0;  /* by default no control for backend */
2156
2157     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2158         cb = statserv_getcontrol();  /* got control block for backend */
2159
2160     if (cb && assoc->backend)
2161         (*cb->bend_close)(assoc->backend);
2162
2163     yaz_log(log_requestdetail, "Got initRequest");
2164     if (req->implementationId)
2165         yaz_log(log_requestdetail, "Id:        %s",
2166                 req->implementationId);
2167     if (req->implementationName)
2168         yaz_log(log_requestdetail, "Name:      %s",
2169                 req->implementationName);
2170     if (req->implementationVersion)
2171         yaz_log(log_requestdetail, "Version:   %s",
2172                 req->implementationVersion);
2173
2174     assoc_init_reset(assoc);
2175
2176     assoc->init->auth = req->idAuthentication;
2177     assoc->init->referenceId = req->referenceId;
2178
2179     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2180     {
2181         Z_CharSetandLanguageNegotiation *negotiation =
2182             yaz_get_charneg_record (req->otherInfo);
2183         if (negotiation &&
2184             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2185             assoc->init->charneg_request = negotiation;
2186     }
2187
2188     /* by default named_result_sets is 0 .. Enable it if client asks for it. */
2189     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2190         assoc->init->named_result_sets = 1;
2191
2192     assoc->backend = 0;
2193     if (cb)
2194     {
2195         if (req->implementationVersion)
2196             yaz_log(log_requestdetail, "Config:    %s",
2197                     cb->configname);
2198
2199         iochan_settimeout(assoc->client_chan, cb->idle_timeout);
2200
2201         /* we have a backend control block, so call that init function */
2202         if (!(binitres = (*cb->bend_init)(assoc->init)))
2203         {
2204             yaz_log(YLOG_WARN, "Bad response from backend.");
2205             return 0;
2206         }
2207         assoc->backend = binitres->handle;
2208     }
2209     else
2210     {
2211         /* no backend. return error */
2212         binitres = (bend_initresult *)
2213             odr_malloc(assoc->encode, sizeof(*binitres));
2214         binitres->errstring = 0;
2215         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2216         iochan_settimeout(assoc->client_chan, 10);
2217     }
2218     if ((assoc->init->bend_sort))
2219         yaz_log(YLOG_DEBUG, "Sort handler installed");
2220     if ((assoc->init->bend_search))
2221         yaz_log(YLOG_DEBUG, "Search handler installed");
2222     if ((assoc->init->bend_present))
2223         yaz_log(YLOG_DEBUG, "Present handler installed");
2224     if ((assoc->init->bend_esrequest))
2225         yaz_log(YLOG_DEBUG, "ESRequest handler installed");
2226     if ((assoc->init->bend_delete))
2227         yaz_log(YLOG_DEBUG, "Delete handler installed");
2228     if ((assoc->init->bend_scan))
2229         yaz_log(YLOG_DEBUG, "Scan handler installed");
2230     if ((assoc->init->bend_segment))
2231         yaz_log(YLOG_DEBUG, "Segment handler installed");
2232
2233     resp->referenceId = req->referenceId;
2234     *options = '\0';
2235     /* let's tell the client what we can do */
2236     if (ODR_MASK_GET(req->options, Z_Options_search))
2237     {
2238         ODR_MASK_SET(resp->options, Z_Options_search);
2239         strcat(options, "srch");
2240     }
2241     if (ODR_MASK_GET(req->options, Z_Options_present))
2242     {
2243         ODR_MASK_SET(resp->options, Z_Options_present);
2244         strcat(options, " prst");
2245     }
2246     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2247         assoc->init->bend_delete)
2248     {
2249         ODR_MASK_SET(resp->options, Z_Options_delSet);
2250         strcat(options, " del");
2251     }
2252     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2253         assoc->init->bend_esrequest)
2254     {
2255         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2256         strcat(options, " extendedServices");
2257     }
2258     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets)
2259         && assoc->init->named_result_sets)
2260     {
2261         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2262         strcat(options, " namedresults");
2263     }
2264     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2265     {
2266         ODR_MASK_SET(resp->options, Z_Options_scan);
2267         strcat(options, " scan");
2268     }
2269     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2270     {
2271         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2272         strcat(options, " concurrop");
2273     }
2274     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2275     {
2276         ODR_MASK_SET(resp->options, Z_Options_sort);
2277         strcat(options, " sort");
2278     }
2279
2280     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2281     {
2282         Z_OtherInformationUnit *p0;
2283
2284         if (!assoc->init->charneg_response)
2285         {
2286             if (assoc->init->query_charset)
2287             {
2288                 assoc->init->charneg_response = yaz_set_response_charneg(
2289                     assoc->encode, assoc->init->query_charset, 0,
2290                     assoc->init->records_in_same_charset);
2291             }
2292             else
2293             {
2294                 yaz_log(YLOG_WARN, "default query_charset not defined by backend");
2295             }
2296         }
2297         if (assoc->init->charneg_response
2298             && (p0=yaz_oi_update(&resp->otherInfo, assoc->encode, NULL, 0, 0)))
2299         {
2300             p0->which = Z_OtherInfo_externallyDefinedInfo;
2301             p0->information.externallyDefinedInfo =
2302                 assoc->init->charneg_response;
2303             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2304             strcat(options, " negotiation");
2305         }
2306     }
2307     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2308         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2309
2310     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2311     {
2312         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2313         assoc->version = 1; /* 1 & 2 are equivalent */
2314     }
2315     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2316     {
2317         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2318         assoc->version = 2;
2319     }
2320     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2321     {
2322         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2323         assoc->version = 3;
2324     }
2325
2326     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2327
2328     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2329         assoc->maximumRecordSize = odr_int_to_int(*req->maximumRecordSize);
2330
2331     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2332         assoc->preferredMessageSize = odr_int_to_int(*req->preferredMessageSize);
2333
2334     resp->preferredMessageSize =
2335         odr_intdup(assoc->encode, assoc->preferredMessageSize);
2336     resp->maximumRecordSize =
2337         odr_intdup(assoc->encode, assoc->maximumRecordSize);
2338
2339     resp->implementationId = odr_prepend(assoc->encode,
2340                 assoc->init->implementation_id,
2341                 resp->implementationId);
2342
2343     resp->implementationVersion = odr_prepend(assoc->encode,
2344                 assoc->init->implementation_version,
2345                 resp->implementationVersion);
2346
2347     resp->implementationName = odr_prepend(assoc->encode,
2348                 assoc->init->implementation_name,
2349                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2350
2351     if (binitres->errcode)
2352     {
2353         assoc->state = ASSOC_DEAD;
2354         resp->userInformationField =
2355             init_diagnostics(assoc->encode, binitres->errcode,
2356                              binitres->errstring);
2357         *resp->result = 0;
2358     }
2359     else
2360         assoc->state = ASSOC_UP;
2361
2362     if (log_request)
2363     {
2364         if (!req->idAuthentication)
2365             yaz_log(log_request, "Auth none");
2366         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2367         {
2368             const char *open = req->idAuthentication->u.open;
2369             const char *slash = strchr(open, '/');
2370             int len;
2371             if (slash)
2372                 len = slash - open;
2373             else
2374                 len = strlen(open);
2375                 yaz_log(log_request, "Auth open %.*s", len, open);
2376         }
2377         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2378         {
2379             const char *user = req->idAuthentication->u.idPass->userId;
2380             const char *group = req->idAuthentication->u.idPass->groupId;
2381             yaz_log(log_request, "Auth idPass %s %s",
2382                     user ? user : "-", group ? group : "-");
2383         }
2384         else if (req->idAuthentication->which
2385                  == Z_IdAuthentication_anonymous)
2386         {
2387             yaz_log(log_request, "Auth anonymous");
2388         }
2389         else
2390         {
2391             yaz_log(log_request, "Auth other");
2392         }
2393     }
2394     if (log_request)
2395     {
2396         WRBUF wr = wrbuf_alloc();
2397         wrbuf_printf(wr, "Init ");
2398         if (binitres->errcode)
2399             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2400         else
2401             wrbuf_printf(wr, "OK -");
2402         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2403                      (req->implementationId ? req->implementationId :"-"),
2404                      (req->implementationName ?
2405                       req->implementationName : "-"),
2406                      (req->implementationVersion ?
2407                       req->implementationVersion : "-")
2408             );
2409         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2410         wrbuf_destroy(wr);
2411     }
2412     return apdu;
2413 }
2414
2415 /*
2416  * Set the specified `errcode' and `errstring' into a UserInfo-1
2417  * external to be returned to the client in accordance with Z35.90
2418  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2419  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2420  */
2421 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2422 {
2423     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2424         addinfo ? " -- " : "", addinfo ? addinfo : "");
2425     return zget_init_diagnostics(odr, error, addinfo);
2426 }
2427
2428 /*
2429  * nonsurrogate diagnostic record.
2430  */
2431 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2432 {
2433     Z_Records *rec = (Z_Records *) odr_malloc(assoc->encode, sizeof(*rec));
2434
2435     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2436             addinfo ? " -- " : "", addinfo ? addinfo : "");
2437
2438     rec->which = Z_Records_NSD;
2439     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2440                                                            error, addinfo);
2441     return rec;
2442 }
2443
2444 /*
2445  * surrogate diagnostic.
2446  */
2447 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2448                                           const char *dbname,
2449                                           int error, const char *addinfo)
2450 {
2451     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2452             addinfo ? " -- " : "", addinfo ? addinfo : "");
2453     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2454 }
2455
2456 static Z_Records *pack_records(association *a, char *setname, Odr_int start,
2457                                Odr_int *num, Z_RecordComposition *comp,
2458                                Odr_int *next, Odr_int *pres,
2459                                Z_ReferenceId *referenceId,
2460                                Odr_oid *oid, int *errcode)
2461 {
2462     int recno, total_length = 0, dumped_records = 0;
2463     int toget = odr_int_to_int(*num);
2464     Z_Records *records =
2465         (Z_Records *) odr_malloc(a->encode, sizeof(*records));
2466     Z_NamePlusRecordList *reclist =
2467         (Z_NamePlusRecordList *) odr_malloc(a->encode, sizeof(*reclist));
2468
2469     records->which = Z_Records_DBOSD;
2470     records->u.databaseOrSurDiagnostics = reclist;
2471     reclist->num_records = 0;
2472
2473     if (toget < 0)
2474         return diagrec(a, YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE, 0);
2475     else if (toget == 0)
2476         reclist->records = odr_nullval();
2477     else
2478         reclist->records = (Z_NamePlusRecord **)
2479             odr_malloc(a->encode, sizeof(*reclist->records) * toget);
2480
2481     *pres = Z_PresentStatus_success;
2482     *num = 0;
2483     *next = 0;
2484
2485     yaz_log(log_requestdetail, "Request to pack " ODR_INT_PRINTF "+%d %s", start, toget, setname);
2486     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2487         a->maximumRecordSize);
2488     for (recno = odr_int_to_int(start); reclist->num_records < toget; recno++)
2489     {
2490         bend_fetch_rr freq;
2491         Z_NamePlusRecord *thisrec;
2492         int this_length = 0;
2493         /*
2494          * we get the number of bytes allocated on the stream before any
2495          * allocation done by the backend - this should give us a reasonable
2496          * idea of the total size of the data so far.
2497          */
2498         total_length = odr_total(a->encode) - dumped_records;
2499         freq.errcode = 0;
2500         freq.errstring = 0;
2501         freq.basename = 0;
2502         freq.len = 0;
2503         freq.record = 0;
2504         freq.last_in_set = 0;
2505         freq.setname = setname;
2506         freq.surrogate_flag = 0;
2507         freq.number = recno;
2508         freq.comp = comp;
2509         freq.request_format = oid;
2510         freq.output_format = 0;
2511         freq.stream = a->encode;
2512         freq.print = a->print;
2513         freq.referenceId = referenceId;
2514         freq.schema = 0;
2515
2516         retrieve_fetch(a, &freq);
2517
2518         *next = freq.last_in_set ? 0 : recno + 1;
2519
2520         if (freq.errcode)
2521         {
2522             if (!freq.surrogate_flag) /* non-surrogate diagnostic i.e. global */
2523             {
2524                 char s[20];
2525                 *pres = Z_PresentStatus_failure;
2526                 /* for 'present request out of range',
2527                    set addinfo to record position if not set */
2528                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2529                                 freq.errstring == 0)
2530                 {
2531                     sprintf(s, "%d", recno);
2532                     freq.errstring = s;
2533                 }
2534                 if (errcode)
2535                     *errcode = freq.errcode;
2536                 return diagrec(a, freq.errcode, freq.errstring);
2537             }
2538             reclist->records[reclist->num_records] =
2539                 surrogatediagrec(a, freq.basename, freq.errcode,
2540                                  freq.errstring);
2541             reclist->num_records++;
2542             continue;
2543         }
2544         if (freq.record == 0)  /* no error and no record ? */
2545         {
2546             *pres = Z_PresentStatus_partial_4;
2547             *next = 0;   /* signal end-of-set and stop */
2548             break;
2549         }
2550         if (freq.len >= 0)
2551             this_length = freq.len;
2552         else
2553             this_length = odr_total(a->encode) - total_length - dumped_records;
2554         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2555             this_length, total_length, dumped_records);
2556         if (a->preferredMessageSize > 0 &&
2557                 this_length + total_length > a->preferredMessageSize)
2558         {
2559             /* record is small enough, really */
2560             if (this_length <= a->preferredMessageSize && recno > start)
2561             {
2562                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2563                 *pres = Z_PresentStatus_partial_2;
2564                 if (*next > 0)
2565                     (*next)--;
2566                 break;
2567             }
2568             /* record can only be fetched by itself */
2569             if (this_length < a->maximumRecordSize)
2570             {
2571                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2572                 if (toget > 1)
2573                 {
2574                     yaz_log(YLOG_DEBUG, "  Dropped it");
2575                     reclist->records[reclist->num_records] =
2576                          surrogatediagrec(
2577                              a, freq.basename,
2578                              YAZ_BIB1_RECORD_EXCEEDS_PREFERRED_MESSAGE_SIZE, 0);
2579                     reclist->num_records++;
2580                     dumped_records += this_length;
2581                     continue;
2582                 }
2583             }
2584             else /* too big entirely */
2585             {
2586                 yaz_log(log_requestdetail, "Record > maxrcdsz "
2587                         "this=%d max=%d",
2588                         this_length, a->maximumRecordSize);
2589                 reclist->records[reclist->num_records] =
2590                     surrogatediagrec(
2591                         a, freq.basename,
2592                         YAZ_BIB1_RECORD_EXCEEDS_MAXIMUM_RECORD_SIZE, 0);
2593                 reclist->num_records++;
2594                 dumped_records += this_length;
2595                 continue;
2596             }
2597         }
2598
2599         if (!(thisrec = (Z_NamePlusRecord *)
2600               odr_malloc(a->encode, sizeof(*thisrec))))
2601             return 0;
2602         thisrec->databaseName = odr_strdup_null(a->encode, freq.basename);
2603         thisrec->which = Z_NamePlusRecord_databaseRecord;
2604
2605         if (!freq.output_format)
2606         {
2607             yaz_log(YLOG_WARN, "bend_fetch output_format not set");
2608             return 0;
2609         }
2610         thisrec->u.databaseRecord = z_ext_record_oid(
2611             a->encode, freq.output_format, freq.record, freq.len);
2612         if (!thisrec->u.databaseRecord)
2613             return 0;
2614         reclist->records[reclist->num_records] = thisrec;
2615         reclist->num_records++;
2616         if (freq.last_in_set)
2617             break;
2618     }
2619     *num = reclist->num_records;
2620     return records;
2621 }
2622
2623 static Z_APDU *process_searchRequest(association *assoc, request *reqb)
2624 {
2625     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2626     bend_search_rr *bsrr =
2627         (bend_search_rr *)nmem_malloc(reqb->request_mem, sizeof(*bsrr));
2628
2629     yaz_log(log_requestdetail, "Got SearchRequest.");
2630     bsrr->association = assoc;
2631     bsrr->referenceId = req->referenceId;
2632     bsrr->srw_sortKeys = 0;
2633     bsrr->srw_setname = 0;
2634     bsrr->srw_setnameIdleTime = 0;
2635     bsrr->estimated_hit_count = 0;
2636     bsrr->partial_resultset = 0;
2637     bsrr->extra_args = 0;
2638     bsrr->extra_response_data = 0;
2639
2640     yaz_log(log_requestdetail, "ResultSet '%s'", req->resultSetName);
2641     if (req->databaseNames)
2642     {
2643         int i;
2644         for (i = 0; i < req->num_databaseNames; i++)
2645             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2646     }
2647
2648     yaz_log_zquery_level(log_requestdetail,req->query);
2649
2650     if (assoc->init->bend_search)
2651     {
2652         bsrr->setname = req->resultSetName;
2653         bsrr->replace_set = *req->replaceIndicator;
2654         bsrr->num_bases = req->num_databaseNames;
2655         bsrr->basenames = req->databaseNames;
2656         bsrr->query = req->query;
2657         bsrr->stream = assoc->encode;
2658         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2659         bsrr->decode = assoc->decode;
2660         bsrr->print = assoc->print;
2661         bsrr->hits = 0;
2662         bsrr->errcode = 0;
2663         bsrr->errstring = NULL;
2664         bsrr->search_info = NULL;
2665         bsrr->search_input = req->otherInfo;
2666         bsrr->present_number = *req->mediumSetPresentNumber;
2667
2668         if (assoc->server && assoc->server->cql_transform
2669             && req->query->which == Z_Query_type_104
2670             && req->query->u.type_104->which == Z_External_CQL)
2671         {
2672             /* have a CQL query and a CQL to PQF transform .. */
2673             int srw_errcode =
2674                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2675                         assoc->server->cql_transform, bsrr->query,
2676                         &bsrr->srw_sortKeys);
2677             if (srw_errcode)
2678                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2679         }
2680
2681         if (assoc->server && assoc->server->ccl_transform
2682             && req->query->which == Z_Query_type_2) /*CCL*/
2683         {
2684             /* have a CCL query and a CCL to PQF transform .. */
2685             int srw_errcode =
2686                 ccl2pqf(bsrr->stream, req->query->u.type_2,
2687                         assoc->server->ccl_transform, bsrr);
2688             if (srw_errcode)
2689                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2690         }
2691
2692         if (!bsrr->errcode)
2693             (assoc->init->bend_search)(assoc->backend, bsrr);
2694     }
2695     else
2696     {
2697         /* FIXME - make a diagnostic for it */
2698         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2699     }
2700     return response_searchRequest(assoc, reqb, bsrr);
2701 }
2702
2703 /*
2704  * Prepare a searchresponse based on the backend results. We probably want
2705  * to look at making the fetching of records nonblocking as well, but
2706  * so far, we'll keep things simple.
2707  * If bsrt is null, that means we're called in response to a communications
2708  * event, and we'll have to get the response for ourselves.
2709  */
2710 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2711                                       bend_search_rr *bsrt)
2712 {
2713     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2714     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2715     Z_SearchResponse *resp = (Z_SearchResponse *)
2716         odr_malloc(assoc->encode, sizeof(*resp));
2717     Odr_int *nulint = odr_intdup(assoc->encode, 0);
2718     Odr_int *next = odr_intdup(assoc->encode, 0);
2719     Odr_int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2720     Odr_int returnedrecs = 0;
2721
2722     apdu->which = Z_APDU_searchResponse;
2723     apdu->u.searchResponse = resp;
2724     resp->referenceId = req->referenceId;
2725     resp->additionalSearchInfo = 0;
2726     resp->otherInfo = 0;
2727     if (!bsrt)
2728     {
2729         yaz_log(YLOG_FATAL, "Bad result from backend");
2730         return 0;
2731     }
2732     else if (bsrt->errcode)
2733     {
2734         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2735         resp->resultCount = nulint;
2736         resp->numberOfRecordsReturned = nulint;
2737         resp->nextResultSetPosition = nulint;
2738         resp->searchStatus = odr_booldup(assoc->encode, 0);
2739         resp->resultSetStatus = none;
2740         resp->presentStatus = 0;
2741     }
2742     else
2743     {
2744         bool_t *sr = odr_booldup(assoc->encode, 1);
2745         Odr_int *toget = odr_intdup(assoc->encode, 0);
2746         Z_RecordComposition comp, *compp = 0;
2747
2748         yaz_log(log_requestdetail, "resultCount: " ODR_INT_PRINTF, bsrt->hits);
2749
2750         resp->records = 0;
2751         resp->resultCount = &bsrt->hits;
2752
2753         comp.which = Z_RecordComp_simple;
2754         /* how many records does the user agent want, then? */
2755         if (bsrt->hits < 0)
2756             *toget = 0;
2757         else if (bsrt->hits <= *req->smallSetUpperBound)
2758         {
2759             *toget = bsrt->hits;
2760             if ((comp.u.simple = req->smallSetElementSetNames))
2761                 compp = &comp;
2762         }
2763         else if (bsrt->hits < *req->largeSetLowerBound)
2764         {
2765             *toget = *req->mediumSetPresentNumber;
2766             if (*toget > bsrt->hits)
2767                 *toget = bsrt->hits;
2768             if ((comp.u.simple = req->mediumSetElementSetNames))
2769                 compp = &comp;
2770         }
2771         else
2772             *toget = 0;
2773
2774         if (*toget && !resp->records)
2775         {
2776             Odr_int *presst = odr_intdup(assoc->encode, 0);
2777             /* Call bend_present if defined */
2778             if (assoc->init->bend_present)
2779             {
2780                 bend_present_rr *bprr = (bend_present_rr *)
2781                     nmem_malloc(reqb->request_mem, sizeof(*bprr));
2782                 bprr->setname = req->resultSetName;
2783                 bprr->start = 1;
2784                 bprr->number = odr_int_to_int(*toget);
2785                 bprr->format = req->preferredRecordSyntax;
2786                 bprr->comp = compp;
2787                 bprr->referenceId = req->referenceId;
2788                 bprr->stream = assoc->encode;
2789                 bprr->print = assoc->print;
2790                 bprr->association = assoc;
2791                 bprr->errcode = 0;
2792                 bprr->errstring = NULL;
2793                 (*assoc->init->bend_present)(assoc->backend, bprr);
2794
2795                 if (bprr->errcode)
2796                 {
2797                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2798                     *resp->presentStatus = Z_PresentStatus_failure;
2799                 }
2800             }
2801
2802             if (!resp->records)
2803                 resp->records = pack_records(
2804                     assoc, req->resultSetName, 1,
2805                     toget, compp, next, presst, req->referenceId,
2806                     req->preferredRecordSyntax, NULL);
2807             if (!resp->records)
2808                 return 0;
2809             resp->numberOfRecordsReturned = toget;
2810             returnedrecs = *toget;
2811             resp->presentStatus = presst;
2812         }
2813         else
2814         {
2815             if (*resp->resultCount)
2816                 *next = 1;
2817             resp->numberOfRecordsReturned = nulint;
2818             resp->presentStatus = 0;
2819         }
2820         resp->nextResultSetPosition = next;
2821         resp->searchStatus = sr;
2822         resp->resultSetStatus = 0;
2823         if (bsrt->estimated_hit_count)
2824         {
2825             resp->resultSetStatus = odr_intdup(assoc->encode,
2826                                                Z_SearchResponse_estimate);
2827         }
2828         else if (bsrt->partial_resultset)
2829         {
2830             resp->resultSetStatus = odr_intdup(assoc->encode,
2831                                                Z_SearchResponse_subset);
2832         }
2833     }
2834     resp->additionalSearchInfo = bsrt->search_info;
2835
2836     if (log_request)
2837     {
2838         int i;
2839         WRBUF wr = wrbuf_alloc();
2840
2841         for (i = 0 ; i < req->num_databaseNames; i++)
2842         {
2843             if (i)
2844                 wrbuf_printf(wr, "+");
2845             wrbuf_puts(wr, req->databaseNames[i]);
2846         }
2847         wrbuf_printf(wr, " ");
2848
2849         if (bsrt->errcode)
2850             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2851         else
2852             wrbuf_printf(wr, "OK " ODR_INT_PRINTF, bsrt->hits);
2853         wrbuf_printf(wr, " %s 1+" ODR_INT_PRINTF " ",
2854                      req->resultSetName, returnedrecs);
2855         yaz_query_to_wrbuf(wr, req->query);
2856
2857         yaz_log(log_request, "Search %s", wrbuf_cstr(wr));
2858         wrbuf_destroy(wr);
2859     }
2860     return apdu;
2861 }
2862
2863 /*
2864  * Maybe we got a little over-friendly when we designed bend_fetch to
2865  * get only one record at a time. Some backends can optimise multiple-record
2866  * fetches, and at any rate, there is some overhead involved in
2867  * all that selecting and hopping around. Problem is, of course, that the
2868  * frontend can't know ahead of time how many records it'll need to
2869  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2870  * is downright lousy as a bulk data transfer protocol.
2871  *
2872  * To start with, we'll do the fetching of records from the backend
2873  * in one operation: To save some trips in and out of the event-handler,
2874  * and to simplify the interface to pack_records. At any rate, asynch
2875  * operation is more fun in operations that have an unpredictable execution
2876  * speed - which is normally more true for search than for present.
2877  */
2878 static Z_APDU *process_presentRequest(association *assoc, request *reqb)
2879 {
2880     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2881     Z_APDU *apdu;
2882     Z_PresentResponse *resp;
2883     Odr_int *next;
2884     Odr_int *num;
2885     int errcode = 0;
2886
2887     yaz_log(log_requestdetail, "Got PresentRequest.");
2888
2889     resp = (Z_PresentResponse *)odr_malloc(assoc->encode, sizeof(*resp));
2890     resp->records = 0;
2891     resp->presentStatus = odr_intdup(assoc->encode, 0);
2892     if (assoc->init->bend_present)
2893     {
2894         bend_present_rr *bprr = (bend_present_rr *)
2895             nmem_malloc(reqb->request_mem, sizeof(*bprr));
2896         bprr->setname = req->resultSetId;
2897         bprr->start = odr_int_to_int(*req->resultSetStartPoint);
2898         bprr->number = odr_int_to_int(*req->numberOfRecordsRequested);
2899         bprr->format = req->preferredRecordSyntax;
2900         bprr->comp = req->recordComposition;
2901         bprr->referenceId = req->referenceId;
2902         bprr->stream = assoc->encode;
2903         bprr->print = assoc->print;
2904         bprr->association = assoc;
2905         bprr->errcode = 0;
2906         bprr->errstring = NULL;
2907         (*assoc->init->bend_present)(assoc->backend, bprr);
2908
2909         if (bprr->errcode)
2910         {
2911             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2912             *resp->presentStatus = Z_PresentStatus_failure;
2913             errcode = bprr->errcode;
2914         }
2915     }
2916     apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2917     next = odr_intdup(assoc->encode, 0);
2918     num = odr_intdup(assoc->encode, 0);
2919
2920     apdu->which = Z_APDU_presentResponse;
2921     apdu->u.presentResponse = resp;
2922     resp->referenceId = req->referenceId;
2923     resp->otherInfo = 0;
2924
2925     if (!resp->records)
2926     {
2927         *num = *req->numberOfRecordsRequested;
2928         resp->records =
2929             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2930                          num, req->recordComposition, next,
2931                          resp->presentStatus,
2932                          req->referenceId, req->preferredRecordSyntax,
2933                          &errcode);
2934     }
2935     if (log_request)
2936     {
2937         WRBUF wr = wrbuf_alloc();
2938         wrbuf_printf(wr, "Present ");
2939
2940         if (*resp->presentStatus == Z_PresentStatus_failure)
2941             wrbuf_printf(wr, "ERROR %d ", errcode);
2942         else if (*resp->presentStatus == Z_PresentStatus_success)
2943             wrbuf_printf(wr, "OK -  ");
2944         else
2945             wrbuf_printf(wr, "Partial " ODR_INT_PRINTF " - ",
2946                          *resp->presentStatus);
2947
2948         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
2949                 req->resultSetId, *req->resultSetStartPoint,
2950                 *req->numberOfRecordsRequested);
2951         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
2952         wrbuf_destroy(wr);
2953     }
2954     if (!resp->records)
2955         return 0;
2956     resp->numberOfRecordsReturned = num;
2957     resp->nextResultSetPosition = next;
2958
2959     return apdu;
2960 }
2961
2962 /*
2963  * Scan was implemented rather in a hurry, and with support for only the basic
2964  * elements of the service in the backend API. Suggestions are welcome.
2965  */
2966 static Z_APDU *process_scanRequest(association *assoc, request *reqb)
2967 {
2968     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2969     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2970     Z_ScanResponse *res = (Z_ScanResponse *)
2971         odr_malloc(assoc->encode, sizeof(*res));
2972     Odr_int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2973     Odr_int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2974     Z_ListEntries *ents = (Z_ListEntries *)
2975         odr_malloc(assoc->encode, sizeof(*ents));
2976     Z_DiagRecs *diagrecs_p = NULL;
2977     bend_scan_rr *bsrr = (bend_scan_rr *)
2978         odr_malloc(assoc->encode, sizeof(*bsrr));
2979     struct scan_entry *save_entries;
2980     int step_size = 0;
2981
2982     yaz_log(log_requestdetail, "Got ScanRequest");
2983
2984     apdu->which = Z_APDU_scanResponse;
2985     apdu->u.scanResponse = res;
2986     res->referenceId = req->referenceId;
2987
2988     /* if step is absent, set it to 0 */
2989     if (req->stepSize)
2990         step_size = odr_int_to_int(*req->stepSize);
2991
2992     res->stepSize = 0;
2993     res->scanStatus = scanStatus;
2994     res->numberOfEntriesReturned = numberOfEntriesReturned;
2995     res->positionOfTerm = 0;
2996     res->entries = ents;
2997     ents->num_entries = 0;
2998     ents->entries = NULL;
2999     ents->num_nonsurrogateDiagnostics = 0;
3000     ents->nonsurrogateDiagnostics = NULL;
3001     res->attributeSet = 0;
3002     res->otherInfo = 0;
3003
3004     if (req->databaseNames)
3005     {
3006         int i;
3007         for (i = 0; i < req->num_databaseNames; i++)
3008             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
3009     }
3010     bsrr->scanClause = 0;
3011     bsrr->errcode = 0;
3012     bsrr->errstring = 0;
3013     bsrr->num_bases = req->num_databaseNames;
3014     bsrr->basenames = req->databaseNames;
3015     bsrr->num_entries = odr_int_to_int(*req->numberOfTermsRequested);
3016     bsrr->term = req->termListAndStartPoint;
3017     bsrr->referenceId = req->referenceId;
3018     bsrr->stream = assoc->encode;
3019     bsrr->print = assoc->print;
3020     bsrr->step_size = &step_size;
3021     bsrr->setname = yaz_oi_get_string_oid(&req->otherInfo,
3022                                           yaz_oid_userinfo_scan_set, 1, 0);
3023     bsrr->entries = 0;
3024     bsrr->extra_args = 0;
3025     bsrr->extra_response_data = 0;
3026     /* For YAZ 2.0 and earlier it was the backend handler that
3027        initialized entries (member display_term did not exist)
3028        YAZ 2.0 and later sets 'entries'  and initialize all members
3029        including 'display_term'. If YAZ 2.0 or later sees that
3030        entries was modified - we assume that it is an old handler and
3031        that 'display_term' is _not_ set.
3032     */
3033     if (bsrr->num_entries > 0)
3034     {
3035         int i;
3036         bsrr->entries = (struct scan_entry *)
3037             odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3038                        bsrr->num_entries);
3039         for (i = 0; i<bsrr->num_entries; i++)
3040         {
3041             bsrr->entries[i].term = 0;
3042             bsrr->entries[i].occurrences = 0;
3043             bsrr->entries[i].errcode = 0;
3044             bsrr->entries[i].errstring = 0;
3045             bsrr->entries[i].display_term = 0;
3046         }
3047     }
3048     save_entries = bsrr->entries;  /* save it so we can compare later */
3049
3050     bsrr->attributeset = req->attributeSet;
3051     log_scan_term_level(log_requestdetail, req->termListAndStartPoint,
3052                         bsrr->attributeset);
3053     bsrr->term_position = req->preferredPositionInResponse ?
3054         odr_int_to_int(*req->preferredPositionInResponse) : 1;
3055
3056     ((int (*)(void *, bend_scan_rr *))
3057      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3058
3059     if (bsrr->errcode)
3060         diagrecs_p = zget_DiagRecs(assoc->encode,
3061                                    bsrr->errcode, bsrr->errstring);
3062     else
3063     {
3064         int i;
3065         Z_Entry **tab = (Z_Entry **)
3066             odr_malloc(assoc->encode, sizeof(*tab) * bsrr->num_entries);
3067
3068         if (bsrr->status == BEND_SCAN_PARTIAL)
3069             *scanStatus = Z_Scan_partial_5;
3070         else
3071             *scanStatus = Z_Scan_success;
3072         res->stepSize = odr_intdup(assoc->encode, step_size);
3073         ents->entries = tab;
3074         ents->num_entries = bsrr->num_entries;
3075         res->numberOfEntriesReturned = odr_intdup(assoc->encode,
3076                                                    ents->num_entries);
3077         res->positionOfTerm = odr_intdup(assoc->encode, bsrr->term_position);
3078         for (i = 0; i < bsrr->num_entries; i++)
3079         {
3080             Z_Entry *e;
3081             Z_TermInfo *t;
3082             Odr_oct *o;
3083
3084             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3085             if (bsrr->entries[i].occurrences >= 0)
3086             {
3087                 e->which = Z_Entry_termInfo;
3088                 e->u.termInfo = t = (Z_TermInfo *)
3089                     odr_malloc(assoc->encode, sizeof(*t));
3090                 t->suggestedAttributes = 0;
3091                 t->displayTerm = 0;
3092                 if (save_entries == bsrr->entries &&
3093                     bsrr->entries[i].display_term)
3094                 {
3095                     /* the entries was _not_ set by the handler. So it's
3096                        safe to test for new member display_term. It is
3097                        NULL'ed by us.
3098                     */
3099                     t->displayTerm = odr_strdup(assoc->encode,
3100                                                 bsrr->entries[i].display_term);
3101                 }
3102                 t->alternativeTerm = 0;
3103                 t->byAttributes = 0;
3104                 t->otherTermInfo = 0;
3105                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3106                 t->term = (Z_Term *)
3107                     odr_malloc(assoc->encode, sizeof(*t->term));
3108                 t->term->which = Z_Term_general;
3109                 t->term->u.general = o =
3110                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3111                 o->buf = (unsigned char *)
3112                     odr_malloc(assoc->encode, o->len = o->size =
3113                                strlen(bsrr->entries[i].term));
3114                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3115                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (" ODR_INT_PRINTF ")", i,
3116                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3117             }
3118             else
3119             {
3120                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3121                                                   bsrr->entries[i].errcode,
3122                                                   bsrr->entries[i].errstring);
3123                 assert(drecs->num_diagRecs == 1);
3124                 e->which = Z_Entry_surrogateDiagnostic;
3125                 assert(drecs->diagRecs[0]);
3126                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3127             }
3128         }
3129     }
3130     if (diagrecs_p)
3131     {
3132         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3133         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3134     }
3135     if (log_request)
3136     {
3137         int i;
3138         WRBUF wr = wrbuf_alloc();
3139         wrbuf_printf(wr, "Scan ");
3140         for (i = 0 ; i < req->num_databaseNames; i++)
3141         {
3142             if (i)
3143                 wrbuf_printf(wr, "+");
3144             wrbuf_puts(wr, req->databaseNames[i]);
3145         }
3146
3147         wrbuf_printf(wr, " ");
3148
3149         if (bsrr->errcode)
3150             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3151         else
3152             wrbuf_printf(wr, "OK");
3153
3154         wrbuf_printf(wr, " " ODR_INT_PRINTF " - " ODR_INT_PRINTF "+"
3155                      ODR_INT_PRINTF "+" ODR_INT_PRINTF,
3156                      res->numberOfEntriesReturned ?
3157                      *res->numberOfEntriesReturned : 0,
3158                      (req->preferredPositionInResponse ?
3159                       *req->preferredPositionInResponse : 1),
3160                      *req->numberOfTermsRequested,
3161                      (res->stepSize ? *res->stepSize : 1));
3162
3163         if (bsrr->setname)
3164             wrbuf_printf(wr, "+%s", bsrr->setname);
3165
3166         wrbuf_printf(wr, " ");
3167         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3168                           bsrr->attributeset);
3169         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3170         wrbuf_destroy(wr);
3171     }
3172     return apdu;
3173 }
3174
3175 static Z_APDU *process_sortRequest(association *assoc, request *reqb)
3176 {
3177     int i;
3178     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3179     Z_SortResponse *res = (Z_SortResponse *)
3180         odr_malloc(assoc->encode, sizeof(*res));
3181     bend_sort_rr *bsrr = (bend_sort_rr *)
3182         odr_malloc(assoc->encode, sizeof(*bsrr));
3183
3184     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3185
3186     yaz_log(log_requestdetail, "Got SortRequest.");
3187
3188     bsrr->num_input_setnames = req->num_inputResultSetNames;
3189     for (i=0;i<req->num_inputResultSetNames;i++)
3190         yaz_log(log_requestdetail, "Input resultset: '%s'",
3191                 req->inputResultSetNames[i]);
3192     bsrr->input_setnames = req->inputResultSetNames;
3193     bsrr->referenceId = req->referenceId;
3194     bsrr->output_setname = req->sortedResultSetName;
3195     yaz_log(log_requestdetail, "Output resultset: '%s'",
3196                 req->sortedResultSetName);
3197     bsrr->sort_sequence = req->sortSequence;
3198        /*FIXME - dump those sequences too */
3199     bsrr->stream = assoc->encode;
3200     bsrr->print = assoc->print;
3201
3202     bsrr->sort_status = Z_SortResponse_failure;
3203     bsrr->errcode = 0;
3204     bsrr->errstring = 0;
3205
3206     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3207
3208     res->referenceId = bsrr->referenceId;
3209     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3210     res->resultSetStatus = 0;
3211     if (bsrr->errcode)
3212     {
3213         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3214                                        bsrr->errcode, bsrr->errstring);
3215         res->diagnostics = dr->diagRecs;
3216         res->num_diagnostics = dr->num_diagRecs;
3217     }
3218     else
3219     {
3220         res->num_diagnostics = 0;
3221         res->diagnostics = 0;
3222     }
3223     res->resultCount = 0;
3224     res->otherInfo = 0;
3225
3226     apdu->which = Z_APDU_sortResponse;
3227     apdu->u.sortResponse = res;
3228     if (log_request)
3229     {
3230         WRBUF wr = wrbuf_alloc();
3231         wrbuf_printf(wr, "Sort ");
3232         if (bsrr->errcode)
3233             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3234         else
3235             wrbuf_printf(wr,  "OK -");
3236         wrbuf_printf(wr, " (");
3237         for (i = 0; i<req->num_inputResultSetNames; i++)
3238         {
3239             if (i)
3240                 wrbuf_printf(wr, "+");
3241             wrbuf_puts(wr, req->inputResultSetNames[i]);
3242         }
3243         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3244
3245         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3246         wrbuf_destroy(wr);
3247     }
3248     return apdu;
3249 }
3250
3251 static Z_APDU *process_deleteRequest(association *assoc, request *reqb)
3252 {
3253     int i;
3254     Z_DeleteResultSetRequest *req =
3255         reqb->apdu_request->u.deleteResultSetRequest;
3256     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3257         odr_malloc(assoc->encode, sizeof(*res));
3258     bend_delete_rr *bdrr = (bend_delete_rr *)
3259         odr_malloc(assoc->encode, sizeof(*bdrr));
3260     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3261
3262     yaz_log(log_requestdetail, "Got DeleteRequest.");
3263
3264     bdrr->num_setnames = req->num_resultSetList;
3265     bdrr->setnames = req->resultSetList;
3266     for (i = 0; i<req->num_resultSetList; i++)
3267         yaz_log(log_requestdetail, "resultset: '%s'",
3268                 req->resultSetList[i]);
3269     bdrr->stream = assoc->encode;
3270     bdrr->print = assoc->print;
3271     bdrr->function = odr_int_to_int(*req->deleteFunction);
3272     bdrr->referenceId = req->referenceId;
3273     bdrr->statuses = 0;
3274     if (bdrr->num_setnames > 0)
3275     {
3276         bdrr->statuses = (int*)
3277             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3278                        bdrr->num_setnames);
3279         for (i = 0; i < bdrr->num_setnames; i++)
3280             bdrr->statuses[i] = 0;
3281     }
3282     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3283
3284     res->referenceId = req->referenceId;
3285
3286     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3287
3288     res->deleteListStatuses = 0;
3289     if (bdrr->num_setnames > 0)
3290     {
3291         int i;
3292         res->deleteListStatuses = (Z_ListStatuses *)
3293             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3294         res->deleteListStatuses->num = bdrr->num_setnames;
3295         res->deleteListStatuses->elements =
3296             (Z_ListStatus **)
3297             odr_malloc(assoc->encode,
3298                         sizeof(*res->deleteListStatuses->elements) *
3299                         bdrr->num_setnames);
3300         for (i = 0; i<bdrr->num_setnames; i++)
3301         {
3302             res->deleteListStatuses->elements[i] =
3303                 (Z_ListStatus *)
3304                 odr_malloc(assoc->encode,
3305                             sizeof(**res->deleteListStatuses->elements));
3306             res->deleteListStatuses->elements[i]->status =
3307                 odr_intdup(assoc->encode, bdrr->statuses[i]);
3308             res->deleteListStatuses->elements[i]->id =
3309                 odr_strdup(assoc->encode, bdrr->setnames[i]);
3310         }
3311     }
3312     res->numberNotDeleted = 0;
3313     res->bulkStatuses = 0;
3314     res->deleteMessage = 0;
3315     res->otherInfo = 0;
3316
3317     apdu->which = Z_APDU_deleteResultSetResponse;
3318     apdu->u.deleteResultSetResponse = res;
3319     if (log_request)
3320     {
3321         WRBUF wr = wrbuf_alloc();
3322         wrbuf_printf(wr, "Delete ");
3323         if (bdrr->delete_status)
3324             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3325         else
3326             wrbuf_printf(wr, "OK -");
3327         for (i = 0; i<req->num_resultSetList; i++)
3328             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3329         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3330         wrbuf_destroy(wr);
3331     }
3332     return apdu;
3333 }
3334
3335 static void process_close(association *assoc, request *reqb)
3336 {
3337     Z_Close *req = reqb->apdu_request->u.close;
3338     static char *reasons[] =
3339     {
3340         "finished",
3341         "shutdown",
3342         "systemProblem",
3343         "costLimit",
3344         "resources",
3345         "securityViolation",
3346         "protocolError",
3347         "lackOfActivity",
3348         "peerAbort",
3349         "unspecified"
3350     };
3351
3352     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3353         reasons[*req->closeReason], req->diagnosticInformation ?
3354         req->diagnosticInformation : "NULL");
3355     if (assoc->version < 3) /* to make do_force respond with close */
3356         assoc->version = 3;
3357     do_close_req(assoc, Z_Close_finished,
3358                  "Association terminated by client", reqb);
3359     yaz_log(log_request,"Close OK");
3360 }
3361
3362 static Z_APDU *process_segmentRequest(association *assoc, request *reqb)
3363 {
3364     bend_segment_rr req;
3365
3366     req.segment = reqb->apdu_request->u.segmentRequest;
3367     req.stream = assoc->encode;
3368     req.decode = assoc->decode;
3369     req.print = assoc->print;
3370     req.association = assoc;
3371
3372     (*assoc->init->bend_segment)(assoc->backend, &req);
3373
3374     return 0;
3375 }
3376
3377 static Z_APDU *process_ESRequest(association *assoc, request *reqb)
3378 {
3379     bend_esrequest_rr esrequest;
3380     const char *ext_name = "unknown";
3381
3382     Z_ExtendedServicesRequest *req =
3383         reqb->apdu_request->u.extendedServicesRequest;
3384     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3385
3386     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3387
3388     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3389     esrequest.stream = assoc->encode;
3390     esrequest.decode = assoc->decode;
3391     esrequest.print = assoc->print;
3392     esrequest.errcode = 0;
3393     esrequest.errstring = NULL;
3394     esrequest.association = assoc;
3395     esrequest.taskPackage = 0;
3396     esrequest.referenceId = req->referenceId;
3397
3398     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3399     {
3400         switch(esrequest.esr->taskSpecificParameters->which)
3401         {
3402         case Z_External_itemOrder:
3403             ext_name = "ItemOrder"; break;
3404         case Z_External_update:
3405             ext_name = "Update"; break;
3406         case Z_External_update0:
3407             ext_name = "Update0"; break;
3408         case Z_External_ESAdmin:
3409             ext_name = "Admin"; break;
3410
3411         }
3412     }
3413
3414     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3415
3416     resp->referenceId = req->referenceId;
3417
3418     if (esrequest.errcode == -1)
3419     {
3420         /* Backend service indicates request will be processed */
3421         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3422         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3423     }
3424     else if (esrequest.errcode == 0)
3425     {
3426         /* Backend service indicates request will be processed */
3427         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3428         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3429     }
3430     else
3431     {
3432         Z_DiagRecs *diagRecs =
3433             zget_DiagRecs(assoc->encode, esrequest.errcode,
3434                           esrequest.errstring);
3435         /* Backend indicates error, request will not be processed */
3436         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3437         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3438         resp->num_diagnostics = diagRecs->num_diagRecs;
3439         resp->diagnostics = diagRecs->diagRecs;
3440         if (log_request)
3441         {
3442             WRBUF wr = wrbuf_alloc();
3443             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3444             yaz_log(log_request, "EsRequest %s", wrbuf_cstr(wr) );
3445             wrbuf_destroy(wr);
3446         }
3447
3448     }
3449     /* Do something with the members of bend_extendedservice */
3450     if (esrequest.taskPackage)
3451     {
3452         resp->taskPackage = z_ext_record_oid(
3453             assoc->encode, yaz_oid_recsyn_extended,
3454             (const char *)  esrequest.taskPackage, -1);
3455     }
3456     yaz_log(YLOG_DEBUG,"Send the result apdu");
3457     return apdu;
3458 }
3459
3460 int bend_assoc_is_alive(bend_association assoc)
3461 {
3462     if (assoc->state == ASSOC_DEAD)
3463         return 0; /* already marked as dead. Don't check I/O chan anymore */
3464
3465     return iochan_is_alive(assoc->client_chan);
3466 }
3467
3468
3469 /*
3470  * Local variables:
3471  * c-basic-offset: 4
3472  * c-file-style: "Stroustrup"
3473  * indent-tabs-mode: nil
3474  * End:
3475  * vim: shiftwidth=4 tabstop=8 expandtab
3476  */
3477