src/seshigh.c

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