src/seshigh.c

   1 /* This file is part of the YAZ toolkit.
   2  * Copyright (C) 1995-2013 Index Data
   3  * See the file LICENSE for details.
   4  */
   5 /**
   6  * \file seshigh.c
   7  * \brief Implements GFS session logic.
   8  *
   9  * Frontend server logic.
  10  *
  11  * This code receives incoming APDUs, and handles client requests by means
  12  * of the backend API.
  13  *
  14  * Some of the code is getting quite involved, compared to simpler servers -
  15  * primarily because it is asynchronous both in the communication with
  16  * the user and the backend. We think the complexity will pay off in
  17  * the form of greater flexibility when more asynchronous facilities
  18  * are implemented.
  19  *
  20  * Memory management has become somewhat involved. In the simple case, where
  21  * only one PDU is pending at a time, it will simply reuse the same memory,
  22  * once it has found its working size. When we enable multiple concurrent
  23  * operations, perhaps even with multiple parallel calls to the backend, it
  24  * will maintain a pool of buffers for encoding and decoding, trying to
  25  * minimize memory allocation/deallocation during normal operation.
  26  *
  27  */
  28 #if HAVE_CONFIG_H
  29 #include <config.h>
  30 #endif
  31
  32 #include <limits.h>
  33 #include <stdlib.h>
  34 #include <stdio.h>
  35 #include <assert.h>
  36
  37 #if HAVE_SYS_TYPES_H
  38 #include <sys/types.h>
  39 #endif
  40 #if HAVE_SYS_STAT_H
  41 #include <sys/stat.h>
  42 #endif
  43
  44 #ifdef WIN32
  45 #include <io.h>
  46 #define S_ISREG(x) (x & _S_IFREG)
  47 #include <process.h>
  48 #endif
  49
  50 #if HAVE_UNISTD_H
  51 #include <unistd.h>
  52 #endif
  53
  54 #if YAZ_HAVE_XML2
  55 #include <libxml/parser.h>
  56 #include <libxml/tree.h>
  57 #endif
  58
  59 #include <yaz/xmalloc.h>
  60 #include <yaz/comstack.h>
  61 #include "eventl.h"
  62 #include "session.h"
  63 #include "mime.h"
  64 #include <yaz/proto.h>
  65 #include <yaz/oid_db.h>
  66 #include <yaz/log.h>
  67 #include <yaz/logrpn.h>
  68 #include <yaz/querytowrbuf.h>
  69 #include <yaz/statserv.h>
  70 #include <yaz/diagbib1.h>
  71 #include <yaz/charneg.h>
  72 #include <yaz/otherinfo.h>
  73 #include <yaz/yaz-util.h>
  74 #include <yaz/pquery.h>
  75 #include <yaz/oid_db.h>
  76
  77 #include <yaz/srw.h>
  78 #include <yaz/backend.h>
  79 #include <yaz/yaz-ccl.h>
  80
  81 static void process_gdu_request(association *assoc, request *req);
  82 static int process_z_request(association *assoc, request *req, char **msg);
  83 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  84 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  85 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  86 static Z_External *init_diagnostics(ODR odr, int errcode,
  87                                     const char *errstring);
  88 static Z_APDU *process_searchRequest(association *assoc, request *reqb);
  89 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  90                                       bend_search_rr *bsrr);
  91 static Z_APDU *process_presentRequest(association *assoc, request *reqb);
  92 static Z_APDU *process_scanRequest(association *assoc, request *reqb);
  93 static Z_APDU *process_sortRequest(association *assoc, request *reqb);
  94 static void process_close(association *assoc, request *reqb);
  95 static Z_APDU *process_deleteRequest(association *assoc, request *reqb);
  96 static Z_APDU *process_segmentRequest(association *assoc, request *reqb);
  97 static Z_APDU *process_ESRequest(association *assoc, request *reqb);
  98
  99 /* dynamic logging levels */
 100 static int logbits_set = 0;
 101 static int log_session = 0; /* one-line logs for session */
 102 static int log_sessiondetail = 0; /* more detailed stuff */
 103 static int log_request = 0; /* one-line logs for requests */
 104 static int log_requestdetail = 0;  /* more detailed stuff */
 105
 106 /** get_logbits sets global loglevel bits */
 107 static void get_logbits(void)
 108 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 109     if (!logbits_set)
 110     {
 111         logbits_set = 1;
 112         log_session = yaz_log_module_level("session");
 113         log_sessiondetail = yaz_log_module_level("sessiondetail");
 114         log_request = yaz_log_module_level("request");
 115         log_requestdetail = yaz_log_module_level("requestdetail");
 116     }
 117 }
 118
 119 static void wr_diag(WRBUF w, int error, const char *addinfo)
 120 {
 121     wrbuf_printf(w, "ERROR %d+", error);
 122     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
 123     if (addinfo)
 124     {
 125         wrbuf_puts(w, "+");
 126         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
 127     }
 128     wrbuf_puts(w, " ");
 129 }
 130
 131 static int odr_int_to_int(Odr_int v)
 132 {
 133     if (v >= INT_MAX)
 134         return INT_MAX;
 135     else if (v <= INT_MIN)
 136         return INT_MIN;
 137     else
 138         return (int) v;
 139 }
 140
 141 /*
 142  * Create and initialize a new association-handle.
 143  *  channel  : iochannel for the current line.
 144  *  link     : communications channel.
 145  * Returns: 0 or a new association handle.
 146  */
 147 association *create_association(IOCHAN channel, COMSTACK link,
 148                                 const char *apdufile)
 149 {
 150     association *anew;
 151
 152     if (!logbits_set)
 153         get_logbits();
 154     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 155         return 0;
 156     anew->init = 0;
 157     anew->version = 0;
 158     anew->last_control = 0;
 159     anew->client_chan = channel;
 160     anew->client_link = link;
 161     anew->cs_get_mask = 0;
 162     anew->cs_put_mask = 0;
 163     anew->cs_accept_mask = 0;
 164     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 165         !(anew->encode = odr_createmem(ODR_ENCODE)))
 166         return 0;
 167     if (apdufile && *apdufile)
 168     {
 169         FILE *f;
 170
 171         if (!(anew->print = odr_createmem(ODR_PRINT)))
 172             return 0;
 173         if (*apdufile == '@')
 174         {
 175             odr_setprint(anew->print, yaz_log_file());
 176         }
 177         else if (*apdufile != '-')
 178         {
 179             char filename[256];
 180             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 181             if (!(f = fopen(filename, "w")))
 182             {
 183                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 184                 return 0;
 185             }
 186             setvbuf(f, 0, _IONBF, 0);
 187             odr_setprint(anew->print, f);
 188         }
 189     }
 190     else
 191         anew->print = 0;
 192     anew->input_buffer = 0;
 193     anew->input_buffer_len = 0;
 194     anew->backend = 0;
 195     anew->state = ASSOC_NEW;
 196     request_initq(&anew->incoming);
 197     request_initq(&anew->outgoing);
 198     anew->proto = cs_getproto(link);
 199     anew->server = 0;
 200     return anew;
 201 }
 202
 203 /*
 204  * Free association and release resources.
 205  */
 206 void destroy_association(association *h)
 207 {
 208     statserv_options_block *cb = statserv_getcontrol();
 209     request *req;
 210
 211     xfree(h->init);
 212     odr_destroy(h->decode);
 213     odr_destroy(h->encode);
 214     if (h->print)
 215         odr_destroy(h->print);
 216     if (h->input_buffer)
 217     xfree(h->input_buffer);
 218     if (h->backend)
 219         (*cb->bend_close)(h->backend);
 220     while ((req = request_deq(&h->incoming)))
 221         request_release(req);
 222     while ((req = request_deq(&h->outgoing)))
 223         request_release(req);
 224     request_delq(&h->incoming);
 225     request_delq(&h->outgoing);
 226     xfree(h);
 227     xmalloc_trav("session closed");
 228 }
 229
 230 static void do_close_req(association *a, int reason, char *message,
 231                          request *req)
 232 {
 233     Z_APDU *apdu = zget_APDU(a->encode, Z_APDU_close);
 234     Z_Close *cls = apdu->u.close;
 235
 236     /* Purge request queue */
 237     while (request_deq(&a->incoming));
 238     while (request_deq(&a->outgoing));
 239     if (a->version >= 3)
 240     {
 241         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 242             reason, message ? message : "none");
 243         *cls->closeReason = reason;
 244         cls->diagnosticInformation = message;
 245         process_z_response(a, req, apdu);
 246         iochan_settimeout(a->client_chan, 20);
 247     }
 248     else
 249     {
 250         request_release(req);
 251         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 252         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 253         a->cs_put_mask = 0;
 254     }
 255     a->state = ASSOC_DEAD;
 256 }
 257
 258 static void do_close(association *a, int reason, char *message)
 259 {
 260     request *req = request_get(&a->outgoing);
 261     do_close_req(a, reason, message, req);
 262 }
 263
 264
 265 int ir_read(IOCHAN h, int event)
 266 {
 267     association *assoc = (association *)iochan_getdata(h);
 268     COMSTACK conn = assoc->client_link;
 269     request *req;
 270
 271     if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 272     {
 273         /* We aren't speaking to this fellow */
 274         if (assoc->state == ASSOC_DEAD)
 275         {
 276             yaz_log(log_session, "Connection closed - end of session");
 277             cs_close(conn);
 278             destroy_association(assoc);
 279             iochan_destroy(h);
 280             return 0;
 281         }
 282         assoc->cs_get_mask = EVENT_INPUT;
 283
 284         do
 285         {
 286             int res = cs_get(conn, &assoc->input_buffer,
 287                              &assoc->input_buffer_len);
 288             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 289             {
 290                 yaz_log(log_session, "Connection error: %s res=%d",
 291                         cs_errmsg(cs_errno(conn)), res);
 292                 req = request_get(&assoc->incoming); /* get a new request */
 293                 do_close_req(assoc, Z_Close_protocolError,
 294                              "Incoming package too large", req);
 295                 return 0;
 296             }
 297             else if (res <= 0)
 298             {
 299                 assoc->state = ASSOC_DEAD;
 300                 yaz_log(log_session, "Connection closed by client");
 301                 return 0;
 302             }
 303             else if (res == 1) /* incomplete read - wait for more  */
 304             {
 305                 if (conn->io_pending & CS_WANT_WRITE)
 306                     assoc->cs_get_mask |= EVENT_OUTPUT;
 307                 iochan_setflag(h, assoc->cs_get_mask);
 308                 return 0;
 309             }
 310             /* we got a complete PDU. Let's decode it */
 311             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 312                     assoc->input_buffer[0] & 0xff,
 313                     assoc->input_buffer[1] & 0xff,
 314                     assoc->input_buffer[2] & 0xff);
 315             req = request_get(&assoc->incoming); /* get a new request */
 316             odr_reset(assoc->decode);
 317             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 318             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 319             {
 320                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 321                         "[near byte %ld] ",
 322                         odr_errmsg(odr_geterror(assoc->decode)),
 323                         odr_getelement(assoc->decode),
 324                         (long) odr_offset(assoc->decode));
 325                 if (assoc->decode->error != OHTTP)
 326                 {
 327                     yaz_log(YLOG_WARN, "PDU dump:");
 328                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 329                     request_release(req);
 330                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 331                 }
 332                 else
 333                 {
 334                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 335                     assoc->state = ASSOC_DEAD;
 336                     process_gdu_response(assoc, req, p);
 337                 }
 338                 return 0;
 339             }
 340             req->request_mem = odr_extract_mem(assoc->decode);
 341             if (assoc->print)
 342             {
 343                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 344                     yaz_log(YLOG_WARN, "ODR print error: %s",
 345                             odr_errmsg(odr_geterror(assoc->print)));
 346                 odr_reset(assoc->print);
 347             }
 348             request_enq(&assoc->incoming, req);
 349         }
 350         while (cs_more(conn));
 351     }
 352     return 1;
 353 }
 354
 355 /*
 356  * This is where PDUs from the client are read and the further
 357  * processing is initiated. Flow of control moves down through the
 358  * various process_* functions below, until the encoded result comes back up
 359  * to the output handler in here.
 360  *
 361  *  h     : the I/O channel that has an outstanding event.
 362  *  event : the current outstanding event.
 363  */
 364 void ir_session(IOCHAN h, int event)
 365 {
 366     int res;
 367     association *assoc = (association *)iochan_getdata(h);
 368     COMSTACK conn = assoc->client_link;
 369     request *req;
 370
 371     assert(h && conn && assoc);
 372     if (event == EVENT_TIMEOUT)
 373     {
 374         if (assoc->state != ASSOC_UP)
 375         {
 376             yaz_log(log_session, "Timeout. Closing connection");
 377             /* do we need to lod this at all */
 378             cs_close(conn);
 379             destroy_association(assoc);
 380             iochan_destroy(h);
 381         }
 382         else
 383         {
 384             yaz_log(log_sessiondetail, "Timeout. Sending Z39.50 Close");
 385             do_close(assoc, Z_Close_lackOfActivity, 0);
 386         }
 387         return;
 388     }
 389     if (event & assoc->cs_accept_mask)
 390     {
 391         if (!cs_accept(conn))
 392         {
 393             yaz_log(YLOG_WARN, "accept failed");
 394             destroy_association(assoc);
 395             iochan_destroy(h);
 396             return;
 397         }
 398         iochan_clearflag(h, EVENT_OUTPUT);
 399         if (conn->io_pending)
 400         {   /* cs_accept didn't complete */
 401             assoc->cs_accept_mask =
 402                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 403                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 404
 405             iochan_setflag(h, assoc->cs_accept_mask);
 406         }
 407         else
 408         {   /* cs_accept completed. Prepare for reading (cs_get) */
 409             assoc->cs_accept_mask = 0;
 410             assoc->cs_get_mask = EVENT_INPUT;
 411             iochan_setflag(h, assoc->cs_get_mask);
 412         }
 413         return;
 414     }
 415     if (event & assoc->cs_get_mask) /* input */
 416     {
 417         if (!ir_read(h, event))
 418             return;
 419         req = request_head(&assoc->incoming);
 420         if (req->state == REQUEST_IDLE)
 421         {
 422             request_deq(&assoc->incoming);
 423             process_gdu_request(assoc, req);
 424         }
 425     }
 426     if (event & assoc->cs_put_mask)
 427     {
 428         request *req = request_head(&assoc->outgoing);
 429
 430         assoc->cs_put_mask = 0;
 431         yaz_log(YLOG_DEBUG, "ir_session (output)");
 432         req->state = REQUEST_PENDING;
 433         switch (res = cs_put(conn, req->response, req->len_response))
 434         {
 435         case -1:
 436             yaz_log(log_sessiondetail, "Connection closed by client");
 437             cs_close(conn);
 438             destroy_association(assoc);
 439             iochan_destroy(h);
 440             break;
 441         case 0: /* all sent - release the request structure */
 442             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 443 #if 0
 444             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 445                     req->response);
 446 #endif
 447             request_deq(&assoc->outgoing);
 448             request_release(req);
 449             if (!request_head(&assoc->outgoing))
 450             {   /* restore mask for cs_get operation ... */
 451                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 452                 iochan_setflag(h, assoc->cs_get_mask);
 453                 if (assoc->state == ASSOC_DEAD)
 454                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 455             }
 456             else
 457             {
 458                 assoc->cs_put_mask = EVENT_OUTPUT;
 459             }
 460             break;
 461         default:
 462             if (conn->io_pending & CS_WANT_WRITE)
 463                 assoc->cs_put_mask |= EVENT_OUTPUT;
 464             if (conn->io_pending & CS_WANT_READ)
 465                 assoc->cs_put_mask |= EVENT_INPUT;
 466             iochan_setflag(h, assoc->cs_put_mask);
 467         }
 468     }
 469     if (event & EVENT_EXCEPT)
 470     {
 471         yaz_log(YLOG_WARN, "ir_session (exception)");
 472         cs_close(conn);
 473         destroy_association(assoc);
 474         iochan_destroy(h);
 475     }
 476 }
 477
 478 static int process_z_request(association *assoc, request *req, char **msg);
 479
 480
 481 static void assoc_init_reset(association *assoc)
 482 {
 483     xfree(assoc->init);
 484     assoc->init = (bend_initrequest *) xmalloc(sizeof(*assoc->init));
 485
 486     assoc->init->stream = assoc->encode;
 487     assoc->init->print = assoc->print;
 488     assoc->init->auth = 0;
 489     assoc->init->referenceId = 0;
 490     assoc->init->implementation_version = 0;
 491     assoc->init->implementation_id = 0;
 492     assoc->init->implementation_name = 0;
 493     assoc->init->query_charset = 0;
 494     assoc->init->records_in_same_charset = 0;
 495     assoc->init->bend_sort = NULL;
 496     assoc->init->bend_search = NULL;
 497     assoc->init->bend_present = NULL;
 498     assoc->init->bend_esrequest = NULL;
 499     assoc->init->bend_delete = NULL;
 500     assoc->init->bend_scan = NULL;
 501     assoc->init->bend_segment = NULL;
 502     assoc->init->bend_fetch = NULL;
 503     assoc->init->bend_explain = NULL;
 504     assoc->init->bend_srw_scan = NULL;
 505     assoc->init->bend_srw_update = NULL;
 506     assoc->init->named_result_sets = 0;
 507
 508     assoc->init->charneg_request = NULL;
 509     assoc->init->charneg_response = NULL;
 510
 511     assoc->init->decode = assoc->decode;
 512     assoc->init->peer_name =
 513         odr_strdup(assoc->encode, cs_addrstr(assoc->client_link));
 514
 515     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 516 }
 517
 518 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 519 {
 520     statserv_options_block *cb = statserv_getcontrol();
 521     if (!assoc->init)
 522     {
 523         const char *encoding = "UTF-8";
 524         Z_External *ce;
 525         bend_initresult *binitres;
 526
 527         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 528         assoc_init_reset(assoc);
 529
 530         if (sr->username)
 531         {
 532             Z_IdAuthentication *auth = (Z_IdAuthentication *)
 533                 odr_malloc(assoc->decode, sizeof(*auth));
 534             size_t len;
 535
 536             len = strlen(sr->username) + 1;
 537             if (sr->password)
 538                 len += strlen(sr->password) + 2;
 539             yaz_log(log_requestdetail, "username=%s password-len=%ld",
 540                     sr->username, (long)
 541                     (sr->password ? strlen(sr->password) : 0));
 542             auth->which = Z_IdAuthentication_open;
 543             auth->u.open = (char *) odr_malloc(assoc->decode, len);
 544             strcpy(auth->u.open, sr->username);
 545             if (sr->password && *sr->password)
 546             {
 547                 strcat(auth->u.open, "/");
 548                 strcat(auth->u.open, sr->password);
 549             }
 550             assoc->init->auth = auth;
 551         }
 552
 553 #if 1
 554         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 555         assoc->init->charneg_request = ce->u.charNeg3;
 556 #endif
 557         assoc->backend = 0;
 558         if (!(binitres = (*cb->bend_init)(assoc->init)))
 559         {
 560             assoc->state = ASSOC_DEAD;
 561             yaz_add_srw_diagnostic(assoc->encode, d, num,
 562                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 563             return 0;
 564         }
 565         assoc->backend = binitres->handle;
 566         assoc->init->auth = 0;
 567         if (binitres->errcode)
 568         {
 569             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 570             assoc->state = ASSOC_DEAD;
 571             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 572                                    binitres->errstring);
 573             return 0;
 574         }
 575         return 1;
 576     }
 577     return 1;
 578 }
 579
 580 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 581 {
 582 #if YAZ_HAVE_XML2
 583     yaz_record_conv_t rc = 0;
 584     const char *match_schema = 0;
 585     Odr_oid *match_syntax = 0;
 586
 587     if (assoc->server)
 588     {
 589         int r;
 590         const char *input_schema = yaz_get_esn(rr->comp);
 591         Odr_oid *input_syntax_raw = rr->request_format;
 592
 593         const char *backend_schema = 0;
 594         Odr_oid *backend_syntax = 0;
 595
 596         r = yaz_retrieval_request(assoc->server->retrieval,
 597                                   input_schema,
 598                                   input_syntax_raw,
 599                                   &match_schema,
 600                                   &match_syntax,
 601                                   &rc,
 602                                   &backend_schema,
 603                                   &backend_syntax);
 604         if (r == -1) /* error ? */
 605         {
 606             const char *details = yaz_retrieval_get_error(
 607                 assoc->server->retrieval);
 608
 609             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 610             if (details)
 611                 rr->errstring = odr_strdup(rr->stream, details);
 612             return -1;
 613         }
 614         else if (r == 1 || r == 3)
 615         {
 616             const char *details = input_schema;
 617             rr->errcode =
 618                 YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
 619             if (details)
 620                 rr->errstring = odr_strdup(rr->stream, details);
 621             return -1;
 622         }
 623         else if (r == 2)
 624         {
 625             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 626             if (input_syntax_raw)
 627             {
 628                 char oidbuf[OID_STR_MAX];
 629                 oid_oid_to_dotstring(input_syntax_raw, oidbuf);
 630                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 631             }
 632             return -1;
 633         }
 634         if (backend_schema)
 635         {
 636             yaz_set_esn(&rr->comp, backend_schema, odr_getmem(rr->stream));
 637         }
 638         if (backend_syntax)
 639             rr->request_format = backend_syntax;
 640     }
 641     (*assoc->init->bend_fetch)(assoc->backend, rr);
 642     if (rc && rr->record && rr->errcode == 0)
 643     {   /* post conversion must take place .. */
 644         WRBUF output_record = wrbuf_alloc();
 645         int r = 1;
 646         const char *details = 0;
 647         if (rr->len > 0)
 648         {
 649             r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 650             if (r)
 651                 details = yaz_record_conv_get_error(rc);
 652         }
 653         else if (rr->len == -1 && rr->output_format &&
 654                  !oid_oidcmp(rr->output_format, yaz_oid_recsyn_opac))
 655         {
 656             r = yaz_record_conv_opac_record(
 657                 rc, (Z_OPACRecord *) rr->record, output_record);
 658             if (r)
 659                 details = yaz_record_conv_get_error(rc);
 660         }
 661         if (r == 0 && match_syntax &&
 662             !oid_oidcmp(match_syntax, yaz_oid_recsyn_opac))
 663         {
 664             yaz_marc_t mt = yaz_marc_create();
 665             Z_OPACRecord *opac = 0;
 666             if (yaz_xml_to_opac(mt, wrbuf_buf(output_record),
 667                                 wrbuf_len(output_record),
 668                                 &opac, 0 /* iconv */, rr->stream->mem, 0)
 669                 && opac)
 670             {
 671                 rr->len = -1;
 672                 rr->record = (char *) opac;
 673             }
 674             else
 675             {
 676                 details = "XML to OPAC conversion failed";
 677                 r = 1;
 678             }
 679             yaz_marc_destroy(mt);
 680         }
 681         else if (r == 0)
 682         {
 683             rr->len = wrbuf_len(output_record);
 684             rr->record = (char *) odr_malloc(rr->stream, rr->len);
 685             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 686         }
 687         if (r)
 688         {
 689             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 690             if (details)
 691                 rr->errstring = odr_strdup(rr->stream, details);
 692         }
 693         wrbuf_destroy(output_record);
 694     }
 695     if (match_syntax)
 696         rr->output_format = match_syntax;
 697     if (match_schema)
 698         rr->schema = odr_strdup(rr->stream, match_schema);
 699 #else
 700     (*assoc->init->bend_fetch)(assoc->backend, rr);
 701 #endif
 702     return 0;
 703 }
 704
 705 static int srw_bend_fetch(association *assoc, int pos,
 706                           Z_SRW_searchRetrieveRequest *srw_req,
 707                           Z_SRW_record *record,
 708                           const char **addinfo, int *last_in_set)
 709 {
 710     bend_fetch_rr rr;
 711     ODR o = assoc->encode;
 712
 713     rr.setname = "default";
 714     rr.number = pos;
 715     rr.referenceId = 0;
 716     rr.request_format = odr_oiddup(assoc->decode, yaz_oid_recsyn_xml);
 717
 718     rr.comp = (Z_RecordComposition *)
 719             odr_malloc(assoc->decode, sizeof(*rr.comp));
 720     rr.comp->which = Z_RecordComp_complex;
 721     rr.comp->u.complex = (Z_CompSpec *)
 722             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 723     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 724         odr_malloc(assoc->encode, sizeof(bool_t));
 725     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 726     rr.comp->u.complex->num_dbSpecific = 0;
 727     rr.comp->u.complex->dbSpecific = 0;
 728     rr.comp->u.complex->num_recordSyntax = 0;
 729     rr.comp->u.complex->recordSyntax = 0;
 730
 731     rr.comp->u.complex->generic = (Z_Specification *)
 732             odr_malloc(assoc->decode, sizeof(Z_Specification));
 733
 734     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 735     rr.comp->u.complex->generic->which = Z_Schema_uri;
 736     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 737
 738     /* ESN = recordSchema if recordSchema is present */
 739     rr.comp->u.complex->generic->elementSpec = 0;
 740     if (srw_req->recordSchema)
 741     {
 742         rr.comp->u.complex->generic->elementSpec =
 743             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 744         rr.comp->u.complex->generic->elementSpec->which =
 745             Z_ElementSpec_elementSetName;
 746         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 747             srw_req->recordSchema;
 748     }
 749
 750     rr.stream = assoc->encode;
 751     rr.print = assoc->print;
 752
 753     rr.basename = 0;
 754     rr.len = 0;
 755     rr.record = 0;
 756     rr.last_in_set = 0;
 757     rr.errcode = 0;
 758     rr.errstring = 0;
 759     rr.surrogate_flag = 0;
 760     rr.schema = srw_req->recordSchema;
 761
 762     if (!assoc->init->bend_fetch)
 763         return 1;
 764
 765     retrieve_fetch(assoc, &rr);
 766
 767     *last_in_set = rr.last_in_set;
 768
 769     if (rr.errcode && rr.surrogate_flag)
 770     {
 771         int code = yaz_diag_bib1_to_srw(rr.errcode);
 772         yaz_mk_sru_surrogate(o, record, pos, code, rr.errstring);
 773         return 0;
 774     }
 775     else if (rr.len >= 0)
 776     {
 777         record->recordData_buf = rr.record;
 778         record->recordData_len = rr.len;
 779         record->recordPosition = odr_intdup(o, pos);
 780         record->recordSchema = odr_strdup_null(
 781             o, rr.schema ? rr.schema : srw_req->recordSchema);
 782     }
 783     if (rr.errcode)
 784     {
 785         *addinfo = rr.errstring;
 786         return rr.errcode;
 787     }
 788     return 0;
 789 }
 790
 791 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 792                    Z_Query *query_result, char **sortkeys_p)
 793 {
 794     /* have a CQL query and  CQL to PQF transform .. */
 795     CQL_parser cp = cql_parser_create();
 796     int r;
 797     int srw_errcode = 0;
 798     const char *add = 0;
 799     WRBUF rpn_buf = wrbuf_alloc();
 800
 801     *sortkeys_p = 0;
 802     r = cql_parser_string(cp, cql);
 803     if (r)
 804     {
 805         srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 806     }
 807     if (!r)
 808     {
 809         struct cql_node *cn = cql_parser_result(cp);
 810
 811         /* Syntax OK */
 812         r = cql_transform(ct, cn, wrbuf_vp_puts, rpn_buf);
 813         if (r)
 814             srw_errcode = cql_transform_error(ct, &add);
 815         else
 816         {
 817             char out[100];
 818             int r = cql_sortby_to_sortkeys_buf(cn, out, sizeof(out)-1);
 819
 820             if (r == 0)
 821             {
 822                 if (*out)
 823                     yaz_log(log_requestdetail, "srw_sortKeys '%s'", out);
 824                 *sortkeys_p = odr_strdup(odr, out);
 825             }
 826             else
 827             {
 828                 yaz_log(log_requestdetail, "failed to create srw_sortKeys");
 829                 srw_errcode = YAZ_SRW_UNSUPP_SORT_TYPE;
 830             }
 831         }
 832     }
 833     if (!r)
 834     {
 835         /* Syntax & transform OK. */
 836         /* Convert PQF string to Z39.50 to RPN query struct */
 837         YAZ_PQF_Parser pp = yaz_pqf_create();
 838         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, wrbuf_cstr(rpn_buf));
 839         if (!rpnquery)
 840         {
 841             size_t off;
 842             const char *pqf_msg;
 843             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 844             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 845                     pqf_msg, code);
 846             srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 847         }
 848         else
 849         {
 850             query_result->which = Z_Query_type_1;
 851             query_result->u.type_1 = rpnquery;
 852         }
 853         yaz_pqf_destroy(pp);
 854     }
 855     cql_parser_destroy(cp);
 856     wrbuf_destroy(rpn_buf);
 857     return srw_errcode;
 858 }
 859
 860 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 861                         Z_AttributesPlusTerm *result)
 862 {
 863     Z_Query query;
 864     Z_RPNQuery *rpn;
 865     char *sortkeys = 0;
 866     int srw_error = cql2pqf(odr, cql, ct, &query, &sortkeys);
 867     if (srw_error)
 868         return srw_error;
 869     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 870         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* bad query type */
 871     rpn = query.u.type_1;
 872     if (!rpn->RPNStructure)
 873         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be structure */
 874     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 875         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be simple */
 876     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 877         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be be attributes + term */
 878     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 879            sizeof(*result));
 880     return 0;
 881 }
 882
 883
 884 static int ccl2pqf(ODR odr, const Odr_oct *ccl, CCL_bibset bibset,
 885                    bend_search_rr *bsrr)
 886 {
 887     char *ccl0;
 888     struct ccl_rpn_node *node;
 889     int errcode, pos;
 890
 891     ccl0 = odr_strdupn(odr, (char*) ccl->buf, ccl->len);
 892     if ((node = ccl_find_str(bibset, ccl0, &errcode, &pos)) == 0)
 893     {
 894         bsrr->errstring = (char*) ccl_err_msg(errcode);
 895         return YAZ_SRW_QUERY_SYNTAX_ERROR;    /* Query syntax error */
 896     }
 897
 898     bsrr->query->which = Z_Query_type_1;
 899     bsrr->query->u.type_1 = ccl_rpn_query(odr, node);
 900     return 0;
 901 }
 902
 903 static void srw_bend_search(association *assoc,
 904                             Z_SRW_PDU *sr,
 905                             Z_SRW_PDU *res,
 906                             int *http_code)
 907 {
 908     Z_SRW_searchRetrieveResponse *srw_res = res->u.response;
 909     int srw_error = 0;
 910     Z_External *ext;
 911     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 912
 913     *http_code = 200;
 914     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 915     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 916     if (srw_res->num_diagnostics == 0 && assoc->init)
 917     {
 918         bend_search_rr rr;
 919         rr.setname = "default";
 920         rr.replace_set = 1;
 921         rr.num_bases = 1;
 922         rr.basenames = &srw_req->database;
 923         rr.referenceId = 0;
 924         rr.srw_sortKeys = 0;
 925         rr.srw_setname = 0;
 926         rr.srw_setnameIdleTime = 0;
 927         rr.estimated_hit_count = 0;
 928         rr.partial_resultset = 0;
 929         rr.query = (Z_Query *) odr_malloc(assoc->decode, sizeof(*rr.query));
 930         rr.query->u.type_1 = 0;
 931         rr.extra_args = sr->extra_args;
 932         rr.extra_response_data = 0;
 933         rr.present_number = srw_req->maximumRecords ?
 934             *srw_req->maximumRecords : 0;
 935
 936         if (srw_req->query_type == Z_SRW_query_type_cql)
 937         {
 938             if (assoc->server && assoc->server->cql_transform)
 939             {
 940                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 941                                           assoc->server->cql_transform,
 942                                           rr.query,
 943                                           &rr.srw_sortKeys);
 944
 945                 if (srw_errcode)
 946                 {
 947                     yaz_add_srw_diagnostic(assoc->encode,
 948                                            &srw_res->diagnostics,
 949                                            &srw_res->num_diagnostics,
 950                                            srw_errcode, 0);
 951                 }
 952             }
 953             else
 954             {
 955                 /* CQL query to backend. Wrap it - Z39.50 style */
 956                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 957                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 958                                                         "1.2.840.10003.16.2");
 959                 ext->indirect_reference = 0;
 960                 ext->descriptor = 0;
 961                 ext->which = Z_External_CQL;
 962                 ext->u.cql = srw_req->query.cql;
 963
 964                 rr.query->which = Z_Query_type_104;
 965                 rr.query->u.type_104 =  ext;
 966             }
 967         }
 968         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 969         {
 970             Z_RPNQuery *RPNquery;
 971             YAZ_PQF_Parser pqf_parser;
 972
 973             pqf_parser = yaz_pqf_create();
 974
 975             RPNquery = yaz_pqf_parse(pqf_parser, assoc->decode,
 976                                      srw_req->query.pqf);
 977             if (!RPNquery)
 978             {
 979                 const char *pqf_msg;
 980                 size_t off;
 981                 int code = yaz_pqf_error(pqf_parser, &pqf_msg, &off);
 982                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 983                         code, pqf_msg, (long) off);
 984                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 985             }
 986
 987             rr.query->which = Z_Query_type_1;
 988             rr.query->u.type_1 =  RPNquery;
 989
 990             yaz_pqf_destroy(pqf_parser);
 991         }
 992         else
 993         {
 994             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 995                                    &srw_res->num_diagnostics,
 996                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 997         }
 998         if (rr.query->u.type_1)
 999         {
1000             rr.stream = assoc->encode;
1001             rr.decode = assoc->decode;
1002             rr.print = assoc->print;
1003             if (srw_req->sort.sortKeys)
1004                 rr.srw_sortKeys = odr_strdup(assoc->encode,
1005                                              srw_req->sort.sortKeys);
1006             rr.association = assoc;
1007             rr.hits = 0;
1008             rr.errcode = 0;
1009             rr.errstring = 0;
1010             rr.search_info = 0;
1011             rr.search_input = 0;
1012             yaz_log_zquery_level(log_requestdetail,rr.query);
1013
1014             (assoc->init->bend_search)(assoc->backend, &rr);
1015             if (rr.errcode)
1016             {
1017                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1018                 {
1019                     *http_code = 404;
1020                 }
1021                 else
1022                 {
1023                     srw_error = yaz_diag_bib1_to_srw(rr.errcode);
1024                     yaz_add_srw_diagnostic(assoc->encode,
1025                                            &srw_res->diagnostics,
1026                                            &srw_res->num_diagnostics,
1027                                            srw_error, rr.errstring);
1028                 }
1029             }
1030             else
1031             {
1032                 int number = srw_req->maximumRecords ?
1033                     odr_int_to_int(*srw_req->maximumRecords) : 0;
1034                 int start = srw_req->startRecord ?
1035                     odr_int_to_int(*srw_req->startRecord) : 1;
1036
1037                 yaz_log(log_requestdetail, "Request to pack %d+%d out of "
1038                         ODR_INT_PRINTF,
1039                         start, number, rr.hits);
1040
1041                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
1042                 if (rr.srw_setname)
1043                 {
1044                     srw_res->resultSetId =
1045                         odr_strdup(assoc->encode, rr.srw_setname );
1046                     srw_res->resultSetIdleTime =
1047                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
1048                 }
1049
1050                 if (start > rr.hits || start < 1)
1051                 {
1052                     /* if hits<=0 and start=1 we don't return a diagnostic */
1053                     if (start != 1)
1054                         yaz_add_srw_diagnostic(
1055                             assoc->encode,
1056                             &srw_res->diagnostics, &srw_res->num_diagnostics,
1057                             YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1058                 }
1059                 else if (number > 0)
1060                 {
1061                     int i;
1062                     int ok = 1;
1063                     if (start + number > rr.hits)
1064                         number = odr_int_to_int(rr.hits) - start + 1;
1065
1066                     /* Call bend_present if defined */
1067                     if (assoc->init->bend_present)
1068                     {
1069                         bend_present_rr *bprr = (bend_present_rr*)
1070                             odr_malloc(assoc->decode, sizeof(*bprr));
1071                         bprr->setname = "default";
1072                         bprr->start = start;
1073                         bprr->number = number;
1074                         if (srw_req->recordSchema)
1075                         {
1076                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1077                                                                             sizeof(*bprr->comp));
1078                             bprr->comp->which = Z_RecordComp_simple;
1079                             bprr->comp->u.simple = (Z_ElementSetNames *)
1080                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1081                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1082                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1083                         }
1084                         else
1085                         {
1086                             bprr->comp = 0;
1087                         }
1088                         bprr->stream = assoc->encode;
1089                         bprr->referenceId = 0;
1090                         bprr->print = assoc->print;
1091                         bprr->association = assoc;
1092                         bprr->errcode = 0;
1093                         bprr->errstring = NULL;
1094                         (*assoc->init->bend_present)(assoc->backend, bprr);
1095
1096                         if (bprr->errcode)
1097                         {
1098                             srw_error = yaz_diag_bib1_to_srw(bprr->errcode);
1099                             yaz_add_srw_diagnostic(assoc->encode,
1100                                                    &srw_res->diagnostics,
1101                                                    &srw_res->num_diagnostics,
1102                                                    srw_error, bprr->errstring);
1103                             ok = 0;
1104                         }
1105                     }
1106
1107                     if (ok)
1108                     {
1109                         int j = 0;
1110                         int packing = Z_SRW_recordPacking_string;
1111                         if (srw_req->recordPacking)
1112                         {
1113                             packing =
1114                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1115                             if (packing == -1)
1116                                 packing = Z_SRW_recordPacking_string;
1117                         }
1118                         srw_res->records = (Z_SRW_record *)
1119                             odr_malloc(assoc->encode,
1120                                        number * sizeof(*srw_res->records));
1121
1122                         srw_res->extra_records = (Z_SRW_extra_record **)
1123                             odr_malloc(assoc->encode,
1124                                        number*sizeof(*srw_res->extra_records));
1125
1126                         for (i = 0; i<number; i++)
1127                         {
1128                             int errcode;
1129                             int last_in_set = 0;
1130                             const char *addinfo = 0;
1131
1132                             srw_res->records[j].recordPacking = packing;
1133                             srw_res->records[j].recordData_buf = 0;
1134                             srw_res->extra_records[j] = 0;
1135                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1136                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1137                                                      srw_res->records + j,
1138                                                      &addinfo, &last_in_set);
1139                             if (errcode)
1140                             {
1141                                 yaz_add_srw_diagnostic(assoc->encode,
1142                                                        &srw_res->diagnostics,
1143                                                        &srw_res->num_diagnostics,
1144                                                        yaz_diag_bib1_to_srw(errcode),
1145                                                        addinfo);
1146
1147                                 break;
1148                             }
1149                             if (srw_res->records[j].recordData_buf)
1150                                 j++;
1151                             if (last_in_set)
1152                                 break;
1153                         }
1154                         srw_res->num_records = j;
1155                         if (!j)
1156                             srw_res->records = 0;
1157                     }
1158                 }
1159                 if (rr.extra_response_data)
1160                 {
1161                     res->extraResponseData_buf = rr.extra_response_data;
1162                     res->extraResponseData_len = strlen(rr.extra_response_data);
1163                 }
1164                 if (rr.estimated_hit_count || rr.partial_resultset)
1165                 {
1166                     yaz_add_srw_diagnostic(
1167                         assoc->encode,
1168                         &srw_res->diagnostics,
1169                         &srw_res->num_diagnostics,
1170                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1171                         0);
1172                 }
1173             }
1174         }
1175     }
1176     if (log_request)
1177     {
1178         const char *querystr = "?";
1179         const char *querytype = "?";
1180         WRBUF wr = wrbuf_alloc();
1181
1182         switch (srw_req->query_type)
1183         {
1184         case Z_SRW_query_type_cql:
1185             querytype = "CQL";
1186             querystr = srw_req->query.cql;
1187             break;
1188         case Z_SRW_query_type_pqf:
1189             querytype = "PQF";
1190             querystr = srw_req->query.pqf;
1191             break;
1192         }
1193         wrbuf_printf(wr, "SRWSearch %s ", srw_req->database);
1194         if (srw_res->num_diagnostics)
1195             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1196         else if (*http_code != 200)
1197             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1198         else if (srw_res->numberOfRecords)
1199         {
1200             wrbuf_printf(wr, "OK " ODR_INT_PRINTF,
1201                          (srw_res->numberOfRecords ?
1202                           *srw_res->numberOfRecords : 0));
1203         }
1204         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+%d",
1205                      (srw_res->resultSetId ?
1206                       srw_res->resultSetId : "-"),
1207                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1208                      srw_res->num_records);
1209         yaz_log(log_request, "%s %s: %s", wrbuf_cstr(wr), querytype, querystr);
1210         wrbuf_destroy(wr);
1211     }
1212 }
1213
1214 static char *srw_bend_explain_default(bend_explain_rr *rr)
1215 {
1216 #if YAZ_HAVE_XML2
1217     xmlNodePtr ptr = (xmlNode *) rr->server_node_ptr;
1218     if (!ptr)
1219         return 0;
1220     for (ptr = ptr->children; ptr; ptr = ptr->next)
1221     {
1222         if (ptr->type != XML_ELEMENT_NODE)
1223             continue;
1224         if (!strcmp((const char *) ptr->name, "explain"))
1225         {
1226             int len;
1227             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1228             xmlChar *buf_out;
1229             char *content;
1230
1231             ptr = xmlCopyNode(ptr, 1);
1232
1233             xmlDocSetRootElement(doc, ptr);
1234
1235             xmlDocDumpMemory(doc, &buf_out, &len);
1236             content = (char*) odr_malloc(rr->stream, 1+len);
1237             memcpy(content, buf_out, len);
1238             content[len] = '\0';
1239
1240             xmlFree(buf_out);
1241             xmlFreeDoc(doc);
1242             rr->explain_buf = content;
1243             return 0;
1244         }
1245     }
1246 #endif
1247     return 0;
1248 }
1249
1250 static void srw_bend_explain(association *assoc,
1251                              Z_SRW_PDU *sr,
1252                              Z_SRW_explainResponse *srw_res,
1253                              int *http_code)
1254 {
1255     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1256     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1257     *http_code = 404;
1258     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1259     if (assoc->init)
1260     {
1261         bend_explain_rr rr;
1262
1263         rr.stream = assoc->encode;
1264         rr.decode = assoc->decode;
1265         rr.print = assoc->print;
1266         rr.explain_buf = 0;
1267         rr.database = srw_req->database;
1268         if (assoc->server)
1269             rr.server_node_ptr = assoc->server->server_node_ptr;
1270         else
1271             rr.server_node_ptr = 0;
1272         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1273         if (assoc->init->bend_explain)
1274             (*assoc->init->bend_explain)(assoc->backend, &rr);
1275         else
1276             srw_bend_explain_default(&rr);
1277
1278         if (rr.explain_buf)
1279         {
1280             int packing = Z_SRW_recordPacking_string;
1281             if (srw_req->recordPacking)
1282             {
1283                 packing =
1284                     yaz_srw_str_to_pack(srw_req->recordPacking);
1285                 if (packing == -1)
1286                     packing = Z_SRW_recordPacking_string;
1287             }
1288             srw_res->record.recordSchema = rr.schema;
1289             srw_res->record.recordPacking = packing;
1290             srw_res->record.recordData_buf = rr.explain_buf;
1291             srw_res->record.recordData_len = strlen(rr.explain_buf);
1292             srw_res->record.recordPosition = 0;
1293             *http_code = 200;
1294         }
1295     }
1296 }
1297
1298 static void srw_bend_scan(association *assoc,
1299                           Z_SRW_PDU *sr,
1300                           Z_SRW_PDU *res,
1301                           int *http_code)
1302 {
1303     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1304     Z_SRW_scanResponse *srw_res = res->u.scan_response;
1305     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1306
1307     *http_code = 200;
1308     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1309     if (srw_res->num_diagnostics == 0 && assoc->init)
1310     {
1311         int step_size = 0;
1312         struct scan_entry *save_entries;
1313
1314         bend_scan_rr *bsrr = (bend_scan_rr *)
1315             odr_malloc(assoc->encode, sizeof(*bsrr));
1316         bsrr->num_bases = 1;
1317         bsrr->basenames = &srw_req->database;
1318
1319         bsrr->num_entries = srw_req->maximumTerms ?
1320             odr_int_to_int(*srw_req->maximumTerms) : 10;
1321         bsrr->term_position = srw_req->responsePosition ?
1322             odr_int_to_int(*srw_req->responsePosition) : 1;
1323
1324         bsrr->errcode = 0;
1325         bsrr->errstring = 0;
1326         bsrr->referenceId = 0;
1327         bsrr->stream = assoc->encode;
1328         bsrr->print = assoc->print;
1329         bsrr->step_size = &step_size;
1330         bsrr->entries = 0;
1331         bsrr->setname = 0;
1332         bsrr->extra_response_data = 0;
1333
1334         if (bsrr->num_entries > 0)
1335         {
1336             int i;
1337             bsrr->entries = (struct scan_entry *)
1338                 odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1339                            bsrr->num_entries);
1340             for (i = 0; i<bsrr->num_entries; i++)
1341             {
1342                 bsrr->entries[i].term = 0;
1343                 bsrr->entries[i].occurrences = 0;
1344                 bsrr->entries[i].errcode = 0;
1345                 bsrr->entries[i].errstring = 0;
1346                 bsrr->entries[i].display_term = 0;
1347             }
1348         }
1349         save_entries = bsrr->entries;  /* save it so we can compare later */
1350
1351         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1352             assoc->init->bend_scan)
1353         {
1354             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1355
1356             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1357                                       &bsrr->attributeset,
1358                                       srw_req->scanClause.pqf);
1359             yaz_pqf_destroy(pqf_parser);
1360             bsrr->scanClause = 0;
1361             ((int (*)(void *, bend_scan_rr *))
1362              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1363         }
1364         else if (srw_req->query_type == Z_SRW_query_type_cql
1365                  && assoc->init->bend_scan && assoc->server
1366                  && assoc->server->cql_transform)
1367         {
1368             int srw_error;
1369             bsrr->scanClause = 0;
1370             bsrr->attributeset = 0;
1371             bsrr->term = (Z_AttributesPlusTerm *)
1372                 odr_malloc(assoc->decode, sizeof(*bsrr->term));
1373             srw_error = cql2pqf_scan(assoc->encode,
1374                                      srw_req->scanClause.cql,
1375                                      assoc->server->cql_transform,
1376                                      bsrr->term);
1377             if (srw_error)
1378                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1379                                        &srw_res->num_diagnostics,
1380                                        srw_error, 0);
1381             else
1382             {
1383                 ((int (*)(void *, bend_scan_rr *))
1384                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1385             }
1386         }
1387         else if (srw_req->query_type == Z_SRW_query_type_cql
1388                  && assoc->init->bend_srw_scan)
1389         {
1390             bsrr->term = 0;
1391             bsrr->attributeset = 0;
1392             bsrr->scanClause = srw_req->scanClause.cql;
1393             ((int (*)(void *, bend_scan_rr *))
1394              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1395         }
1396         else
1397         {
1398             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1399                                    &srw_res->num_diagnostics,
1400                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1401         }
1402         if (bsrr->extra_response_data)
1403         {
1404             res->extraResponseData_buf = bsrr->extra_response_data;
1405             res->extraResponseData_len = strlen(bsrr->extra_response_data);
1406         }
1407         if (bsrr->errcode)
1408         {
1409             int srw_error;
1410             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1411             {
1412                 *http_code = 404;
1413                 return;
1414             }
1415             srw_error = yaz_diag_bib1_to_srw(bsrr->errcode);
1416
1417             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1418                                    &srw_res->num_diagnostics,
1419                                    srw_error, bsrr->errstring);
1420         }
1421         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1422         {
1423             int i;
1424             srw_res->terms = (Z_SRW_scanTerm*)
1425                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1426                            bsrr->num_entries);
1427
1428             srw_res->num_terms =  bsrr->num_entries;
1429             for (i = 0; i<bsrr->num_entries; i++)
1430             {
1431                 Z_SRW_scanTerm *t = srw_res->terms + i;
1432                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1433                 t->numberOfRecords =
1434                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1435                 t->displayTerm = 0;
1436                 if (save_entries == bsrr->entries &&
1437                     bsrr->entries[i].display_term)
1438                 {
1439                     /* the entries was _not_ set by the handler. So it's
1440                        safe to test for new member display_term. It is
1441                        NULL'ed by us.
1442                     */
1443                     t->displayTerm = odr_strdup(assoc->encode,
1444                                                 bsrr->entries[i].display_term);
1445                 }
1446                 t->whereInList = 0;
1447             }
1448         }
1449     }
1450     if (log_request)
1451     {
1452         WRBUF wr = wrbuf_alloc();
1453         const char *querytype = 0;
1454         const char *querystr = 0;
1455
1456         switch(srw_req->query_type)
1457         {
1458         case Z_SRW_query_type_pqf:
1459             querytype = "PQF";
1460             querystr = srw_req->scanClause.pqf;
1461             break;
1462         case Z_SRW_query_type_cql:
1463             querytype = "CQL";
1464             querystr = srw_req->scanClause.cql;
1465             break;
1466         default:
1467             querytype = "UNKNOWN";
1468             querystr = "";
1469         }
1470
1471         wrbuf_printf(wr, "SRWScan %s ", srw_req->database);
1472
1473         if (srw_res->num_diagnostics)
1474             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1475         else if (srw_res->num_terms)
1476             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1477         else
1478             wrbuf_printf(wr, "OK - - ");
1479
1480         wrbuf_printf(wr, ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
1481                      (srw_req->responsePosition ?
1482                       *srw_req->responsePosition : 1),
1483                      (srw_req->maximumTerms ?
1484                       *srw_req->maximumTerms : 1));
1485         /* there is no step size in SRU/W ??? */
1486         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1487         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1488         wrbuf_destroy(wr);
1489     }
1490
1491 }
1492
1493 static void srw_bend_update(association *assoc,
1494                             Z_SRW_PDU *sr,
1495                             Z_SRW_updateResponse *srw_res,
1496                             int *http_code)
1497 {
1498     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1499     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1500     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1501     *http_code = 404;
1502     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1503     if (assoc->init)
1504     {
1505         bend_update_rr rr;
1506         Z_SRW_extra_record *extra = srw_req->extra_record;
1507
1508         rr.stream = assoc->encode;
1509         rr.print = assoc->print;
1510         rr.num_bases = 1;
1511         rr.basenames = &srw_req->database;
1512         rr.operation = srw_req->operation;
1513         rr.operation_status = "failed";
1514         rr.record_id = 0;
1515         rr.record_versions = 0;
1516         rr.num_versions = 0;
1517         rr.record_packing = "string";
1518         rr.record_schema = 0;
1519         rr.record_data = 0;
1520         rr.extra_record_data = 0;
1521         rr.extra_request_data = 0;
1522         rr.extra_response_data = 0;
1523         rr.uri = 0;
1524         rr.message = 0;
1525         rr.details = 0;
1526
1527         *http_code = 200;
1528         if (rr.operation == 0)
1529         {
1530             yaz_add_sru_update_diagnostic(
1531                 assoc->encode, &srw_res->diagnostics,
1532                 &srw_res->num_diagnostics,
1533                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1534                 "action" );
1535             return;
1536         }
1537         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1538         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1539         if (!strcmp( rr.operation, "delete"))
1540         {
1541             if (srw_req->record && !srw_req->record->recordSchema)
1542             {
1543                 rr.record_schema = odr_strdup(
1544                     assoc->encode,
1545                     srw_req->record->recordSchema);
1546             }
1547             if (srw_req->record)
1548             {
1549                 rr.record_data = odr_strdupn(
1550                     assoc->encode,
1551                     srw_req->record->recordData_buf,
1552                     srw_req->record->recordData_len );
1553             }
1554             if (extra && extra->extraRecordData_len)
1555             {
1556                 rr.extra_record_data = odr_strdupn(
1557                     assoc->encode,
1558                     extra->extraRecordData_buf,
1559                     extra->extraRecordData_len );
1560             }
1561             if (srw_req->recordId)
1562                 rr.record_id = srw_req->recordId;
1563             else if (extra && extra->recordIdentifier)
1564                 rr.record_id = extra->recordIdentifier;
1565         }
1566         else if (!strcmp(rr.operation, "replace"))
1567         {
1568             if (srw_req->recordId)
1569                 rr.record_id = srw_req->recordId;
1570             else if (extra && extra->recordIdentifier)
1571                 rr.record_id = extra->recordIdentifier;
1572             else
1573             {
1574                 yaz_add_sru_update_diagnostic(
1575                     assoc->encode, &srw_res->diagnostics,
1576                     &srw_res->num_diagnostics,
1577                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1578                     "recordIdentifier");
1579             }
1580             if (!srw_req->record)
1581             {
1582                 yaz_add_sru_update_diagnostic(
1583                     assoc->encode, &srw_res->diagnostics,
1584                     &srw_res->num_diagnostics,
1585                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1586                     "record");
1587             }
1588             else
1589             {
1590                 if (srw_req->record->recordSchema)
1591                     rr.record_schema = odr_strdup(
1592                         assoc->encode, srw_req->record->recordSchema);
1593                 if (srw_req->record->recordData_len )
1594                 {
1595                     rr.record_data = odr_strdupn(assoc->encode,
1596                                                  srw_req->record->recordData_buf,
1597                                                  srw_req->record->recordData_len );
1598                 }
1599                 else
1600                 {
1601                     yaz_add_sru_update_diagnostic(
1602                         assoc->encode, &srw_res->diagnostics,
1603                         &srw_res->num_diagnostics,
1604                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1605                         "recordData" );
1606                 }
1607             }
1608             if (extra && extra->extraRecordData_len)
1609             {
1610                 rr.extra_record_data = odr_strdupn(
1611                     assoc->encode,
1612                     extra->extraRecordData_buf,
1613                     extra->extraRecordData_len );
1614             }
1615         }
1616         else if (!strcmp(rr.operation, "insert"))
1617         {
1618             if (srw_req->recordId)
1619                 rr.record_id = srw_req->recordId;
1620             else if (extra)
1621                 rr.record_id = extra->recordIdentifier;
1622
1623             if (srw_req->record)
1624             {
1625                 if (srw_req->record->recordSchema)
1626                     rr.record_schema = odr_strdup(
1627                         assoc->encode, srw_req->record->recordSchema);
1628
1629                 if (srw_req->record->recordData_len)
1630                     rr.record_data = odr_strdupn(
1631                         assoc->encode,
1632                         srw_req->record->recordData_buf,
1633                         srw_req->record->recordData_len );
1634             }
1635             if (extra && extra->extraRecordData_len)
1636             {
1637                 rr.extra_record_data = odr_strdupn(
1638                     assoc->encode,
1639                     extra->extraRecordData_buf,
1640                     extra->extraRecordData_len );
1641             }
1642         }
1643         else
1644             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1645                                           &srw_res->num_diagnostics,
1646                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1647                                           rr.operation );
1648
1649         if (srw_req->record)
1650         {
1651             const char *pack_str =
1652                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1653             if (pack_str)
1654                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1655         }
1656
1657         if (srw_req->num_recordVersions)
1658         {
1659             rr.record_versions = srw_req->recordVersions;
1660             rr.num_versions = srw_req->num_recordVersions;
1661         }
1662         if (srw_req->extraRequestData_len)
1663         {
1664             rr.extra_request_data = odr_strdupn(assoc->encode,
1665                                                 srw_req->extraRequestData_buf,
1666                                                 srw_req->extraRequestData_len );
1667         }
1668         if (srw_res->num_diagnostics == 0)
1669         {
1670             if ( assoc->init->bend_srw_update)
1671                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1672             else
1673                 yaz_add_sru_update_diagnostic(
1674                     assoc->encode, &srw_res->diagnostics,
1675                     &srw_res->num_diagnostics,
1676                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1677                     "No Update backend handler");
1678         }
1679
1680         if (rr.uri)
1681             yaz_add_srw_diagnostic_uri(assoc->encode,
1682                                        &srw_res->diagnostics,
1683                                        &srw_res->num_diagnostics,
1684                                        rr.uri,
1685                                        rr.message,
1686                                        rr.details);
1687         srw_res->recordId = rr.record_id;
1688         srw_res->operationStatus = rr.operation_status;
1689         srw_res->recordVersions = rr.record_versions;
1690         srw_res->num_recordVersions = rr.num_versions;
1691         if (srw_res->extraResponseData_len)
1692         {
1693             srw_res->extraResponseData_buf = rr.extra_response_data;
1694             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1695         }
1696         if (srw_res->num_diagnostics == 0 && rr.record_data)
1697         {
1698             srw_res->record = yaz_srw_get_record(assoc->encode);
1699             srw_res->record->recordSchema = rr.record_schema;
1700             if (rr.record_packing)
1701             {
1702                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1703
1704                 if (pack == -1)
1705                 {
1706                     pack = Z_SRW_recordPacking_string;
1707                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1708                             rr.record_packing);
1709                 }
1710                 srw_res->record->recordPacking = pack;
1711             }
1712             srw_res->record->recordData_buf = rr.record_data;
1713             srw_res->record->recordData_len = strlen(rr.record_data);
1714             if (rr.extra_record_data)
1715             {
1716                 Z_SRW_extra_record *ex =
1717                     yaz_srw_get_extra_record(assoc->encode);
1718                 srw_res->extra_record = ex;
1719                 ex->extraRecordData_buf = rr.extra_record_data;
1720                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1721             }
1722         }
1723     }
1724 }
1725
1726 /* check if path is OK (1); BAD (0) */
1727 static int check_path(const char *path)
1728 {
1729     if (*path != '/')
1730         return 0;
1731     if (strstr(path, ".."))
1732         return 0;
1733     return 1;
1734 }
1735
1736 static char *read_file(const char *fname, ODR o, size_t *sz)
1737 {
1738     char *buf;
1739     FILE *inf = fopen(fname, "rb");
1740     if (!inf)
1741         return 0;
1742
1743     fseek(inf, 0L, SEEK_END);
1744     *sz = ftell(inf);
1745     rewind(inf);
1746     buf = (char *) odr_malloc(o, *sz);
1747     if (fread(buf, 1, *sz, inf) != *sz)
1748         yaz_log(YLOG_WARN|YLOG_ERRNO, "short read %s", fname);
1749     fclose(inf);
1750     return buf;
1751 }
1752
1753 static void process_http_request(association *assoc, request *req)
1754 {
1755     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1756     ODR o = assoc->encode;
1757     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1758     Z_SRW_PDU *sr = 0;
1759     Z_SOAP *soap_package = 0;
1760     Z_GDU *p = 0;
1761     char *charset = 0;
1762     Z_HTTP_Response *hres = 0;
1763     int keepalive = 1;
1764     const char *stylesheet = 0; /* for now .. set later */
1765     Z_SRW_diagnostic *diagnostic = 0;
1766     int num_diagnostic = 0;
1767     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1768
1769     yaz_log(log_request, "%s %s HTTP/%s", hreq->method, hreq->path, hreq->version);
1770     if (!control_association(assoc, host, 0))
1771     {
1772         p = z_get_HTTP_Response(o, 404);
1773         r = 1;
1774     }
1775     if (r == 2 && assoc->server && assoc->server->docpath
1776         && hreq->path[0] == '/'
1777         &&
1778         /* check if path is a proper prefix of documentroot */
1779         strncmp(hreq->path+1, assoc->server->docpath,
1780                 strlen(assoc->server->docpath))
1781         == 0)
1782     {
1783         if (!check_path(hreq->path))
1784         {
1785             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1786             p = z_get_HTTP_Response(o, 404);
1787         }
1788         else
1789         {
1790             size_t content_size = 0;
1791             char *content_buf = read_file(hreq->path+1, o, &content_size);
1792             if (!content_buf)
1793             {
1794                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1795                 p = z_get_HTTP_Response(o, 404);
1796             }
1797             else
1798             {
1799                 const char *ctype = 0;
1800                 yaz_mime_types types = yaz_mime_types_create();
1801
1802                 yaz_mime_types_add(types, "xsl", "application/xml");
1803                 yaz_mime_types_add(types, "xml", "application/xml");
1804                 yaz_mime_types_add(types, "css", "text/css");
1805                 yaz_mime_types_add(types, "html", "text/html");
1806                 yaz_mime_types_add(types, "htm", "text/html");
1807                 yaz_mime_types_add(types, "txt", "text/plain");
1808                 yaz_mime_types_add(types, "js", "application/x-javascript");
1809
1810                 yaz_mime_types_add(types, "gif", "image/gif");
1811                 yaz_mime_types_add(types, "png", "image/png");
1812                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1813                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1814
1815                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1816                 if (!ctype)
1817                 {
1818                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1819                     p = z_get_HTTP_Response(o, 404);
1820                 }
1821                 else
1822                 {
1823                     p = z_get_HTTP_Response(o, 200);
1824                     hres = p->u.HTTP_Response;
1825                     hres->content_buf = content_buf;
1826                     hres->content_len = content_size;
1827                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1828                 }
1829                 yaz_mime_types_destroy(types);
1830             }
1831         }
1832         r = 1;
1833     }
1834
1835     if (r == 2)
1836     {
1837         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1838         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1839     }
1840     if (r == 2)  /* not taken */
1841     {
1842         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1843                            &diagnostic, &num_diagnostic);
1844         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1845     }
1846     if (r == 0)  /* decode SRW/SRU OK .. */
1847     {
1848         int http_code = 200;
1849         if (sr->which == Z_SRW_searchRetrieve_request)
1850         {
1851             Z_SRW_PDU *res =
1852                 yaz_srw_get_pdu(assoc->encode, Z_SRW_searchRetrieve_response,
1853                                 sr->srw_version);
1854             stylesheet = sr->u.request->stylesheet;
1855             if (num_diagnostic)
1856             {
1857                 res->u.response->diagnostics = diagnostic;
1858                 res->u.response->num_diagnostics = num_diagnostic;
1859             }
1860             else
1861             {
1862                 srw_bend_search(assoc, sr, res, &http_code);
1863             }
1864             if (http_code == 200)
1865                 soap_package->u.generic->p = res;
1866         }
1867         else if (sr->which == Z_SRW_explain_request)
1868         {
1869             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_explain_response,
1870                                              sr->srw_version);
1871             stylesheet = sr->u.explain_request->stylesheet;
1872             if (num_diagnostic)
1873             {
1874                 res->u.explain_response->diagnostics = diagnostic;
1875                 res->u.explain_response->num_diagnostics = num_diagnostic;
1876             }
1877             srw_bend_explain(assoc, sr, res->u.explain_response, &http_code);
1878             if (http_code == 200)
1879                 soap_package->u.generic->p = res;
1880         }
1881         else if (sr->which == Z_SRW_scan_request)
1882         {
1883             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_scan_response,
1884                                              sr->srw_version);
1885             stylesheet = sr->u.scan_request->stylesheet;
1886             if (num_diagnostic)
1887             {
1888                 res->u.scan_response->diagnostics = diagnostic;
1889                 res->u.scan_response->num_diagnostics = num_diagnostic;
1890             }
1891             srw_bend_scan(assoc, sr, res, &http_code);
1892             if (http_code == 200)
1893                 soap_package->u.generic->p = res;
1894         }
1895         else if (sr->which == Z_SRW_update_request)
1896         {
1897             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_update_response,
1898                                              sr->srw_version);
1899             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1900             if (num_diagnostic)
1901             {
1902                 res->u.update_response->diagnostics = diagnostic;
1903                 res->u.update_response->num_diagnostics = num_diagnostic;
1904             }
1905             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1906             srw_bend_update(assoc, sr, res->u.update_response, &http_code);
1907             if (http_code == 200)
1908                 soap_package->u.generic->p = res;
1909         }
1910         else
1911         {
1912             yaz_log(log_request, "SOAP ERROR");
1913             /* FIXME - what error, what query */
1914             http_code = 500;
1915             z_soap_error(assoc->encode, soap_package,
1916                          "SOAP-ENV:Client", "Bad method", 0);
1917         }
1918         if (http_code == 200 || http_code == 500)
1919         {
1920             static Z_SOAP_Handler soap_handlers[4] = {
1921 #if YAZ_HAVE_XML2
1922                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1923                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1924                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1925 #endif
1926                 {0, 0, 0}
1927             };
1928             char ctype[80];
1929             p = z_get_HTTP_Response(o, 200);
1930             hres = p->u.HTTP_Response;
1931
1932             if (!stylesheet && assoc->server)
1933                 stylesheet = assoc->server->stylesheet;
1934
1935             /* empty stylesheet means NO stylesheet */
1936             if (stylesheet && *stylesheet == '\0')
1937                 stylesheet = 0;
1938
1939             z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1940                                  &hres->content_buf, &hres->content_len,
1941                                  soap_handlers, charset, stylesheet);
1942             hres->code = http_code;
1943
1944             strcpy(ctype, "text/xml");
1945             if (charset && strlen(charset) < sizeof(ctype)-30)
1946             {
1947                 strcat(ctype, "; charset=");
1948                 strcat(ctype, charset);
1949             }
1950             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1951         }
1952         else
1953             p = z_get_HTTP_Response(o, http_code);
1954     }
1955
1956     if (p == 0)
1957         p = z_get_HTTP_Response(o, 500);
1958     hres = p->u.HTTP_Response;
1959     if (!strcmp(hreq->version, "1.0"))
1960     {
1961         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1962         if (v && !strcmp(v, "Keep-Alive"))
1963             keepalive = 1;
1964         else
1965             keepalive = 0;
1966         hres->version = "1.0";
1967     }
1968     else
1969     {
1970         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1971         if (v && !strcmp(v, "close"))
1972             keepalive = 0;
1973         else
1974             keepalive = 1;
1975         hres->version = "1.1";
1976     }
1977     if (!keepalive || !assoc->last_control->keepalive)
1978     {
1979         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1980         assoc->state = ASSOC_DEAD;
1981         assoc->cs_get_mask = 0;
1982     }
1983     else
1984     {
1985         int t;
1986         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1987
1988         if (alive && yaz_isdigit(*(const unsigned char *) alive))
1989             t = atoi(alive);
1990         else
1991             t = 15;
1992         if (t < 0 || t > 3600)
1993             t = 3600;
1994         iochan_settimeout(assoc->client_chan,t);
1995         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1996     }
1997     process_gdu_response(assoc, req, p);
1998 }
1999
2000 static void process_gdu_request(association *assoc, request *req)
2001 {
2002     if (req->gdu_request->which == Z_GDU_Z3950)
2003     {
2004         char *msg = 0;
2005         req->apdu_request = req->gdu_request->u.z3950;
2006         if (process_z_request(assoc, req, &msg) < 0)
2007             do_close_req(assoc, Z_Close_systemProblem, msg, req);
2008     }
2009     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
2010         process_http_request(assoc, req);
2011     else
2012     {
2013         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
2014     }
2015 }
2016
2017 /*
2018  * Initiate request processing.
2019  */
2020 static int process_z_request(association *assoc, request *req, char **msg)
2021 {
2022     Z_APDU *res;
2023     int retval;
2024
2025     *msg = "Unknown Error";
2026     assert(req && req->state == REQUEST_IDLE);
2027     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
2028     {
2029         *msg = "Missing InitRequest";
2030         return -1;
2031     }
2032     switch (req->apdu_request->which)
2033     {
2034     case Z_APDU_initRequest:
2035         res = process_initRequest(assoc, req); break;
2036     case Z_APDU_searchRequest:
2037         res = process_searchRequest(assoc, req); break;
2038     case Z_APDU_presentRequest:
2039         res = process_presentRequest(assoc, req); break;
2040     case Z_APDU_scanRequest:
2041         if (assoc->init->bend_scan)
2042             res = process_scanRequest(assoc, req);
2043         else
2044         {
2045             *msg = "Cannot handle Scan APDU";
2046             return -1;
2047         }
2048         break;
2049     case Z_APDU_extendedServicesRequest:
2050         if (assoc->init->bend_esrequest)
2051             res = process_ESRequest(assoc, req);
2052         else
2053         {
2054             *msg = "Cannot handle Extended Services APDU";
2055             return -1;
2056         }
2057         break;
2058     case Z_APDU_sortRequest:
2059         if (assoc->init->bend_sort)
2060             res = process_sortRequest(assoc, req);
2061         else
2062         {
2063             *msg = "Cannot handle Sort APDU";
2064             return -1;
2065         }
2066         break;
2067     case Z_APDU_close:
2068         process_close(assoc, req);
2069         return 0;
2070     case Z_APDU_deleteResultSetRequest:
2071         if (assoc->init->bend_delete)
2072             res = process_deleteRequest(assoc, req);
2073         else
2074         {
2075             *msg = "Cannot handle Delete APDU";
2076             return -1;
2077         }
2078         break;
2079     case Z_APDU_segmentRequest:
2080         if (assoc->init->bend_segment)
2081         {
2082             res = process_segmentRequest(assoc, req);
2083         }
2084         else
2085         {
2086             *msg = "Cannot handle Segment APDU";
2087             return -1;
2088         }
2089         break;
2090     case Z_APDU_triggerResourceControlRequest:
2091         return 0;
2092     default:
2093         *msg = "Bad APDU received";
2094         return -1;
2095     }
2096     if (res)
2097     {
2098         yaz_log(YLOG_DEBUG, "  result immediately available");
2099         retval = process_z_response(assoc, req, res);
2100     }
2101     else
2102     {
2103         yaz_log(YLOG_DEBUG, "  result unavailable");
2104         retval = -1;
2105     }
2106     return retval;
2107 }
2108
2109 /*
2110  * Encode response, and transfer the request structure to the outgoing queue.
2111  */
2112 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2113 {
2114     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2115
2116     if (assoc->print)
2117     {
2118         if (!z_GDU(assoc->print, &res, 0, 0))
2119             yaz_log(YLOG_WARN, "ODR print error: %s",
2120                 odr_errmsg(odr_geterror(assoc->print)));
2121         odr_reset(assoc->print);
2122     }
2123     if (!z_GDU(assoc->encode, &res, 0, 0))
2124     {
2125         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2126                 odr_errmsg(odr_geterror(assoc->decode)),
2127                 odr_getelement(assoc->decode));
2128         return -1;
2129     }
2130     req->response = odr_getbuf(assoc->encode, &req->len_response,
2131         &req->size_response);
2132     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2133     odr_reset(assoc->encode);
2134     req->state = REQUEST_IDLE;
2135     request_enq(&assoc->outgoing, req);
2136     /* turn the work over to the ir_session handler */
2137     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2138     assoc->cs_put_mask = EVENT_OUTPUT;
2139     /* Is there more work to be done? give that to the input handler too */
2140     for (;;)
2141     {
2142         req = request_head(&assoc->incoming);
2143         if (req && req->state == REQUEST_IDLE)
2144         {
2145             request_deq(&assoc->incoming);
2146             process_gdu_request(assoc, req);
2147         }
2148         else
2149             break;
2150     }
2151     return 0;
2152 }
2153
2154 /*
2155  * Encode response, and transfer the request structure to the outgoing queue.
2156  */
2157 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2158 {
2159     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*gres));
2160     gres->which = Z_GDU_Z3950;
2161     gres->u.z3950 = res;
2162
2163     return process_gdu_response(assoc, req, gres);
2164 }
2165
2166 static char *get_vhost(Z_OtherInformation *otherInfo)
2167 {
2168     return yaz_oi_get_string_oid(&otherInfo, yaz_oid_userinfo_proxy, 1, 0);
2169 }
2170
2171 /*
2172  * Handle init request.
2173  * At the moment, we don't check the options
2174  * anywhere else in the code - we just try not to do anything that would
2175  * break a naive client. We'll toss 'em into the association block when
2176  * we need them there.
2177  */
2178 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2179 {
2180     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2181     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2182     Z_InitResponse *resp = apdu->u.initResponse;
2183     bend_initresult *binitres;
2184     char options[140];
2185     statserv_options_block *cb = 0;  /* by default no control for backend */
2186
2187     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2188         cb = statserv_getcontrol();  /* got control block for backend */
2189
2190     if (cb && assoc->backend)
2191         (*cb->bend_close)(assoc->backend);
2192
2193     yaz_log(log_requestdetail, "Got initRequest");
2194     if (req->implementationId)
2195         yaz_log(log_requestdetail, "Id:        %s",
2196                 req->implementationId);
2197     if (req->implementationName)
2198         yaz_log(log_requestdetail, "Name:      %s",
2199                 req->implementationName);
2200     if (req->implementationVersion)
2201         yaz_log(log_requestdetail, "Version:   %s",
2202                 req->implementationVersion);
2203
2204     assoc_init_reset(assoc);
2205
2206     assoc->init->auth = req->idAuthentication;
2207     assoc->init->referenceId = req->referenceId;
2208
2209     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2210     {
2211         Z_CharSetandLanguageNegotiation *negotiation =
2212             yaz_get_charneg_record (req->otherInfo);
2213         if (negotiation &&
2214             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2215             assoc->init->charneg_request = negotiation;
2216     }
2217
2218     /* by default named_result_sets is 0 .. Enable it if client asks for it. */
2219     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2220         assoc->init->named_result_sets = 1;
2221
2222     assoc->backend = 0;
2223     if (cb)
2224     {
2225         if (req->implementationVersion)
2226             yaz_log(log_requestdetail, "Config:    %s",
2227                     cb->configname);
2228
2229         iochan_settimeout(assoc->client_chan, cb->idle_timeout);
2230
2231         /* we have a backend control block, so call that init function */
2232         if (!(binitres = (*cb->bend_init)(assoc->init)))
2233         {
2234             yaz_log(YLOG_WARN, "Bad response from backend.");
2235             return 0;
2236         }
2237         assoc->backend = binitres->handle;
2238     }
2239     else
2240     {
2241         /* no backend. return error */
2242         binitres = (bend_initresult *)
2243             odr_malloc(assoc->encode, sizeof(*binitres));
2244         binitres->errstring = 0;
2245         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2246         iochan_settimeout(assoc->client_chan, 10);
2247     }
2248     if ((assoc->init->bend_sort))
2249         yaz_log(YLOG_DEBUG, "Sort handler installed");
2250     if ((assoc->init->bend_search))
2251         yaz_log(YLOG_DEBUG, "Search handler installed");
2252     if ((assoc->init->bend_present))
2253         yaz_log(YLOG_DEBUG, "Present handler installed");
2254     if ((assoc->init->bend_esrequest))
2255         yaz_log(YLOG_DEBUG, "ESRequest handler installed");
2256     if ((assoc->init->bend_delete))
2257         yaz_log(YLOG_DEBUG, "Delete handler installed");
2258     if ((assoc->init->bend_scan))
2259         yaz_log(YLOG_DEBUG, "Scan handler installed");
2260     if ((assoc->init->bend_segment))
2261         yaz_log(YLOG_DEBUG, "Segment handler installed");
2262
2263     resp->referenceId = req->referenceId;
2264     *options = '\0';
2265     /* let's tell the client what we can do */
2266     if (ODR_MASK_GET(req->options, Z_Options_search))
2267     {
2268         ODR_MASK_SET(resp->options, Z_Options_search);
2269         strcat(options, "srch");
2270     }
2271     if (ODR_MASK_GET(req->options, Z_Options_present))
2272     {
2273         ODR_MASK_SET(resp->options, Z_Options_present);
2274         strcat(options, " prst");
2275     }
2276     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2277         assoc->init->bend_delete)
2278     {
2279         ODR_MASK_SET(resp->options, Z_Options_delSet);
2280         strcat(options, " del");
2281     }
2282     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2283         assoc->init->bend_esrequest)
2284     {
2285         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2286         strcat(options, " extendedServices");
2287     }
2288     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets)
2289         && assoc->init->named_result_sets)
2290     {
2291         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2292         strcat(options, " namedresults");
2293     }
2294     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2295     {
2296         ODR_MASK_SET(resp->options, Z_Options_scan);
2297         strcat(options, " scan");
2298     }
2299     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2300     {
2301         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2302         strcat(options, " concurrop");
2303     }
2304     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2305     {
2306         ODR_MASK_SET(resp->options, Z_Options_sort);
2307         strcat(options, " sort");
2308     }
2309
2310     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2311     {
2312         Z_OtherInformationUnit *p0;
2313
2314         if (!assoc->init->charneg_response)
2315         {
2316             if (assoc->init->query_charset)
2317             {
2318                 assoc->init->charneg_response = yaz_set_response_charneg(
2319                     assoc->encode, assoc->init->query_charset, 0,
2320                     assoc->init->records_in_same_charset);
2321             }
2322             else
2323             {
2324                 yaz_log(YLOG_WARN, "default query_charset not defined by backend");
2325             }
2326         }
2327         if (assoc->init->charneg_response
2328             && (p0=yaz_oi_update(&resp->otherInfo, assoc->encode, NULL, 0, 0)))
2329         {
2330             p0->which = Z_OtherInfo_externallyDefinedInfo;
2331             p0->information.externallyDefinedInfo =
2332                 assoc->init->charneg_response;
2333             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2334             strcat(options, " negotiation");
2335         }
2336     }
2337     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2338         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2339
2340     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2341     {
2342         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2343         assoc->version = 1; /* 1 & 2 are equivalent */
2344     }
2345     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2346     {
2347         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2348         assoc->version = 2;
2349     }
2350     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2351     {
2352         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2353         assoc->version = 3;
2354     }
2355
2356     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2357
2358     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2359         assoc->maximumRecordSize = odr_int_to_int(*req->maximumRecordSize);
2360
2361     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2362         assoc->preferredMessageSize = odr_int_to_int(*req->preferredMessageSize);
2363
2364     resp->preferredMessageSize =
2365         odr_intdup(assoc->encode, assoc->preferredMessageSize);
2366     resp->maximumRecordSize =
2367         odr_intdup(assoc->encode, assoc->maximumRecordSize);
2368
2369     resp->implementationId = odr_prepend(assoc->encode,
2370                 assoc->init->implementation_id,
2371                 resp->implementationId);
2372
2373     resp->implementationVersion = odr_prepend(assoc->encode,
2374                 assoc->init->implementation_version,
2375                 resp->implementationVersion);
2376
2377     resp->implementationName = odr_prepend(assoc->encode,
2378                 assoc->init->implementation_name,
2379                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2380
2381     if (binitres->errcode)
2382     {
2383         assoc->state = ASSOC_DEAD;
2384         resp->userInformationField =
2385             init_diagnostics(assoc->encode, binitres->errcode,
2386                              binitres->errstring);
2387         *resp->result = 0;
2388     }
2389     else
2390         assoc->state = ASSOC_UP;
2391
2392     if (log_request)
2393     {
2394         if (!req->idAuthentication)
2395             yaz_log(log_request, "Auth none");
2396         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2397         {
2398             const char *open = req->idAuthentication->u.open;
2399             const char *slash = strchr(open, '/');
2400             int len;
2401             if (slash)
2402                 len = slash - open;
2403             else
2404                 len = strlen(open);
2405                 yaz_log(log_request, "Auth open %.*s", len, open);
2406         }
2407         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2408         {
2409             const char *user = req->idAuthentication->u.idPass->userId;
2410             const char *group = req->idAuthentication->u.idPass->groupId;
2411             yaz_log(log_request, "Auth idPass %s %s",
2412                     user ? user : "-", group ? group : "-");
2413         }
2414         else if (req->idAuthentication->which
2415                  == Z_IdAuthentication_anonymous)
2416         {
2417             yaz_log(log_request, "Auth anonymous");
2418         }
2419         else
2420         {
2421             yaz_log(log_request, "Auth other");
2422         }
2423     }
2424     if (log_request)
2425     {
2426         WRBUF wr = wrbuf_alloc();
2427         wrbuf_printf(wr, "Init ");
2428         if (binitres->errcode)
2429             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2430         else
2431             wrbuf_printf(wr, "OK -");
2432         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2433                      (req->implementationId ? req->implementationId :"-"),
2434                      (req->implementationName ?
2435                       req->implementationName : "-"),
2436                      (req->implementationVersion ?
2437                       req->implementationVersion : "-")
2438             );
2439         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2440         wrbuf_destroy(wr);
2441     }
2442     return apdu;
2443 }
2444
2445 /*
2446  * Set the specified `errcode' and `errstring' into a UserInfo-1
2447  * external to be returned to the client in accordance with Z35.90
2448  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2449  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2450  */
2451 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2452 {
2453     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2454         addinfo ? " -- " : "", addinfo ? addinfo : "");
2455     return zget_init_diagnostics(odr, error, addinfo);
2456 }
2457
2458 /*
2459  * nonsurrogate diagnostic record.
2460  */
2461 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2462 {
2463     Z_Records *rec = (Z_Records *) odr_malloc(assoc->encode, sizeof(*rec));
2464
2465     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2466             addinfo ? " -- " : "", addinfo ? addinfo : "");
2467
2468     rec->which = Z_Records_NSD;
2469     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2470                                                            error, addinfo);
2471     return rec;
2472 }
2473
2474 /*
2475  * surrogate diagnostic.
2476  */
2477 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2478                                           const char *dbname,
2479                                           int error, const char *addinfo)
2480 {
2481     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2482             addinfo ? " -- " : "", addinfo ? addinfo : "");
2483     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2484 }
2485
2486 static Z_Records *pack_records(association *a, char *setname, Odr_int start,
2487                                Odr_int *num, Z_RecordComposition *comp,
2488                                Odr_int *next, Odr_int *pres,
2489                                Z_ReferenceId *referenceId,
2490                                Odr_oid *oid, int *errcode)
2491 {
2492     int recno, total_length = 0, dumped_records = 0;
2493     int toget = odr_int_to_int(*num);
2494     Z_Records *records =
2495         (Z_Records *) odr_malloc(a->encode, sizeof(*records));
2496     Z_NamePlusRecordList *reclist =
2497         (Z_NamePlusRecordList *) odr_malloc(a->encode, sizeof(*reclist));
2498
2499     records->which = Z_Records_DBOSD;
2500     records->u.databaseOrSurDiagnostics = reclist;
2501     reclist->num_records = 0;
2502
2503     if (toget < 0)
2504         return diagrec(a, YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE, 0);
2505     else if (toget == 0)
2506         reclist->records = odr_nullval();
2507     else
2508         reclist->records = (Z_NamePlusRecord **)
2509             odr_malloc(a->encode, sizeof(*reclist->records) * toget);
2510
2511     *pres = Z_PresentStatus_success;
2512     *num = 0;
2513     *next = 0;
2514
2515     yaz_log(log_requestdetail, "Request to pack " ODR_INT_PRINTF "+%d %s", start, toget, setname);
2516     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2517         a->maximumRecordSize);
2518     for (recno = odr_int_to_int(start); reclist->num_records < toget; recno++)
2519     {
2520         bend_fetch_rr freq;
2521         Z_NamePlusRecord *thisrec;
2522         int this_length = 0;
2523         /*
2524          * we get the number of bytes allocated on the stream before any
2525          * allocation done by the backend - this should give us a reasonable
2526          * idea of the total size of the data so far.
2527          */
2528         total_length = odr_total(a->encode) - dumped_records;
2529         freq.errcode = 0;
2530         freq.errstring = 0;
2531         freq.basename = 0;
2532         freq.len = 0;
2533         freq.record = 0;
2534         freq.last_in_set = 0;
2535         freq.setname = setname;
2536         freq.surrogate_flag = 0;
2537         freq.number = recno;
2538         freq.comp = comp;
2539         freq.request_format = oid;
2540         freq.output_format = 0;
2541         freq.stream = a->encode;
2542         freq.print = a->print;
2543         freq.referenceId = referenceId;
2544         freq.schema = 0;
2545
2546         retrieve_fetch(a, &freq);
2547
2548         *next = freq.last_in_set ? 0 : recno + 1;
2549
2550         if (freq.errcode)
2551         {
2552             if (!freq.surrogate_flag) /* non-surrogate diagnostic i.e. global */
2553             {
2554                 char s[20];
2555                 *pres = Z_PresentStatus_failure;
2556                 /* for 'present request out of range',
2557                    set addinfo to record position if not set */
2558                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2559                                 freq.errstring == 0)
2560                 {
2561                     sprintf(s, "%d", recno);
2562                     freq.errstring = s;
2563                 }
2564                 if (errcode)
2565                     *errcode = freq.errcode;
2566                 return diagrec(a, freq.errcode, freq.errstring);
2567             }
2568             reclist->records[reclist->num_records] =
2569                 surrogatediagrec(a, freq.basename, freq.errcode,
2570                                  freq.errstring);
2571             reclist->num_records++;
2572             continue;
2573         }
2574         if (freq.record == 0)  /* no error and no record ? */
2575         {
2576             *pres = Z_PresentStatus_partial_4;
2577             *next = 0;   /* signal end-of-set and stop */
2578             break;
2579         }
2580         if (freq.len >= 0)
2581             this_length = freq.len;
2582         else
2583             this_length = odr_total(a->encode) - total_length - dumped_records;
2584         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2585             this_length, total_length, dumped_records);
2586         if (a->preferredMessageSize > 0 &&
2587                 this_length + total_length > a->preferredMessageSize)
2588         {
2589             /* record is small enough, really */
2590             if (this_length <= a->preferredMessageSize && recno > start)
2591             {
2592                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2593                 *pres = Z_PresentStatus_partial_2;
2594                 if (*next > 0)
2595                     (*next)--;
2596                 break;
2597             }
2598             /* record can only be fetched by itself */
2599             if (this_length < a->maximumRecordSize)
2600             {
2601                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2602                 if (toget > 1)
2603                 {
2604                     yaz_log(YLOG_DEBUG, "  Dropped it");
2605                     reclist->records[reclist->num_records] =
2606                          surrogatediagrec(
2607                              a, freq.basename,
2608                              YAZ_BIB1_RECORD_EXCEEDS_PREFERRED_MESSAGE_SIZE, 0);
2609                     reclist->num_records++;
2610                     dumped_records += this_length;
2611                     continue;
2612                 }
2613             }
2614             else /* too big entirely */
2615             {
2616                 yaz_log(log_requestdetail, "Record > maxrcdsz "
2617                         "this=%d max=%d",
2618                         this_length, a->maximumRecordSize);
2619                 reclist->records[reclist->num_records] =
2620                     surrogatediagrec(
2621                         a, freq.basename,
2622                         YAZ_BIB1_RECORD_EXCEEDS_MAXIMUM_RECORD_SIZE, 0);
2623                 reclist->num_records++;
2624                 dumped_records += this_length;
2625                 continue;
2626             }
2627         }
2628
2629         if (!(thisrec = (Z_NamePlusRecord *)
2630               odr_malloc(a->encode, sizeof(*thisrec))))
2631             return 0;
2632         thisrec->databaseName = odr_strdup_null(a->encode, freq.basename);
2633         thisrec->which = Z_NamePlusRecord_databaseRecord;
2634
2635         if (!freq.output_format)
2636         {
2637             yaz_log(YLOG_WARN, "bend_fetch output_format not set");
2638             return 0;
2639         }
2640         thisrec->u.databaseRecord = z_ext_record_oid(
2641             a->encode, freq.output_format, freq.record, freq.len);
2642         if (!thisrec->u.databaseRecord)
2643             return 0;
2644         reclist->records[reclist->num_records] = thisrec;
2645         reclist->num_records++;
2646         if (freq.last_in_set)
2647             break;
2648     }
2649     *num = reclist->num_records;
2650     return records;
2651 }
2652
2653 static Z_APDU *process_searchRequest(association *assoc, request *reqb)
2654 {
2655     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2656     bend_search_rr *bsrr =
2657         (bend_search_rr *)nmem_malloc(reqb->request_mem, sizeof(*bsrr));
2658
2659     yaz_log(log_requestdetail, "Got SearchRequest.");
2660     bsrr->association = assoc;
2661     bsrr->referenceId = req->referenceId;
2662     bsrr->srw_sortKeys = 0;
2663     bsrr->srw_setname = 0;
2664     bsrr->srw_setnameIdleTime = 0;
2665     bsrr->estimated_hit_count = 0;
2666     bsrr->partial_resultset = 0;
2667     bsrr->extra_args = 0;
2668     bsrr->extra_response_data = 0;
2669
2670     yaz_log(log_requestdetail, "ResultSet '%s'", req->resultSetName);
2671     if (req->databaseNames)
2672     {
2673         int i;
2674         for (i = 0; i < req->num_databaseNames; i++)
2675             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2676     }
2677
2678     yaz_log_zquery_level(log_requestdetail,req->query);
2679
2680     if (assoc->init->bend_search)
2681     {
2682         bsrr->setname = req->resultSetName;
2683         bsrr->replace_set = *req->replaceIndicator;
2684         bsrr->num_bases = req->num_databaseNames;
2685         bsrr->basenames = req->databaseNames;
2686         bsrr->query = req->query;
2687         bsrr->stream = assoc->encode;
2688         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2689         bsrr->decode = assoc->decode;
2690         bsrr->print = assoc->print;
2691         bsrr->hits = 0;
2692         bsrr->errcode = 0;
2693         bsrr->errstring = NULL;
2694         bsrr->search_info = NULL;
2695         bsrr->search_input = req->otherInfo;
2696         bsrr->present_number = *req->mediumSetPresentNumber;
2697
2698         if (assoc->server && assoc->server->cql_transform
2699             && req->query->which == Z_Query_type_104
2700             && req->query->u.type_104->which == Z_External_CQL)
2701         {
2702             /* have a CQL query and a CQL to PQF transform .. */
2703             int srw_errcode =
2704                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2705                         assoc->server->cql_transform, bsrr->query,
2706                         &bsrr->srw_sortKeys);
2707             if (srw_errcode)
2708                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2709         }
2710
2711         if (assoc->server && assoc->server->ccl_transform
2712             && req->query->which == Z_Query_type_2) /*CCL*/
2713         {
2714             /* have a CCL query and a CCL to PQF transform .. */
2715             int srw_errcode =
2716                 ccl2pqf(bsrr->stream, req->query->u.type_2,
2717                         assoc->server->ccl_transform, bsrr);
2718             if (srw_errcode)
2719                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2720         }
2721
2722         if (!bsrr->errcode)
2723             (assoc->init->bend_search)(assoc->backend, bsrr);
2724     }
2725     else
2726     {
2727         /* FIXME - make a diagnostic for it */
2728         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2729     }
2730     return response_searchRequest(assoc, reqb, bsrr);
2731 }
2732
2733 /*
2734  * Prepare a searchresponse based on the backend results. We probably want
2735  * to look at making the fetching of records nonblocking as well, but
2736  * so far, we'll keep things simple.
2737  * If bsrt is null, that means we're called in response to a communications
2738  * event, and we'll have to get the response for ourselves.
2739  */
2740 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2741                                       bend_search_rr *bsrt)
2742 {
2743     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2744     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2745     Z_SearchResponse *resp = (Z_SearchResponse *)
2746         odr_malloc(assoc->encode, sizeof(*resp));
2747     Odr_int *nulint = odr_intdup(assoc->encode, 0);
2748     Odr_int *next = odr_intdup(assoc->encode, 0);
2749     Odr_int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2750     Odr_int returnedrecs = 0;
2751
2752     apdu->which = Z_APDU_searchResponse;
2753     apdu->u.searchResponse = resp;
2754     resp->referenceId = req->referenceId;
2755     resp->additionalSearchInfo = 0;
2756     resp->otherInfo = 0;
2757     if (!bsrt)
2758     {
2759         yaz_log(YLOG_FATAL, "Bad result from backend");
2760         return 0;
2761     }
2762     else if (bsrt->errcode)
2763     {
2764         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2765         resp->resultCount = nulint;
2766         resp->numberOfRecordsReturned = nulint;
2767         resp->nextResultSetPosition = nulint;
2768         resp->searchStatus = odr_booldup(assoc->encode, 0);
2769         resp->resultSetStatus = none;
2770         resp->presentStatus = 0;
2771     }
2772     else
2773     {
2774         bool_t *sr = odr_booldup(assoc->encode, 1);
2775         Odr_int *toget = odr_intdup(assoc->encode, 0);
2776         Z_RecordComposition comp, *compp = 0;
2777
2778         yaz_log(log_requestdetail, "resultCount: " ODR_INT_PRINTF, bsrt->hits);
2779
2780         resp->records = 0;
2781         resp->resultCount = &bsrt->hits;
2782
2783         comp.which = Z_RecordComp_simple;
2784         /* how many records does the user agent want, then? */
2785         if (bsrt->hits < 0)
2786             *toget = 0;
2787         else if (bsrt->hits <= *req->smallSetUpperBound)
2788         {
2789             *toget = bsrt->hits;
2790             if ((comp.u.simple = req->smallSetElementSetNames))
2791                 compp = &comp;
2792         }
2793         else if (bsrt->hits < *req->largeSetLowerBound)
2794         {
2795             *toget = *req->mediumSetPresentNumber;
2796             if (*toget > bsrt->hits)
2797                 *toget = bsrt->hits;
2798             if ((comp.u.simple = req->mediumSetElementSetNames))
2799                 compp = &comp;
2800         }
2801         else
2802             *toget = 0;
2803
2804         if (*toget && !resp->records)
2805         {
2806             Odr_int *presst = odr_intdup(assoc->encode, 0);
2807             /* Call bend_present if defined */
2808             if (assoc->init->bend_present)
2809             {
2810                 bend_present_rr *bprr = (bend_present_rr *)
2811                     nmem_malloc(reqb->request_mem, sizeof(*bprr));
2812                 bprr->setname = req->resultSetName;
2813                 bprr->start = 1;
2814                 bprr->number = odr_int_to_int(*toget);
2815                 bprr->format = req->preferredRecordSyntax;
2816                 bprr->comp = compp;
2817                 bprr->referenceId = req->referenceId;
2818                 bprr->stream = assoc->encode;
2819                 bprr->print = assoc->print;
2820                 bprr->association = assoc;
2821                 bprr->errcode = 0;
2822                 bprr->errstring = NULL;
2823                 (*assoc->init->bend_present)(assoc->backend, bprr);
2824
2825                 if (bprr->errcode)
2826                 {
2827                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2828                     *resp->presentStatus = Z_PresentStatus_failure;
2829                 }
2830             }
2831
2832             if (!resp->records)
2833                 resp->records = pack_records(
2834                     assoc, req->resultSetName, 1,
2835                     toget, compp, next, presst, req->referenceId,
2836                     req->preferredRecordSyntax, NULL);
2837             if (!resp->records)
2838                 return 0;
2839             resp->numberOfRecordsReturned = toget;
2840             returnedrecs = *toget;
2841             resp->presentStatus = presst;
2842         }
2843         else
2844         {
2845             if (*resp->resultCount)
2846                 *next = 1;
2847             resp->numberOfRecordsReturned = nulint;
2848             resp->presentStatus = 0;
2849         }
2850         resp->nextResultSetPosition = next;
2851         resp->searchStatus = sr;
2852         resp->resultSetStatus = 0;
2853         if (bsrt->estimated_hit_count)
2854         {
2855             resp->resultSetStatus = odr_intdup(assoc->encode,
2856                                                Z_SearchResponse_estimate);
2857         }
2858         else if (bsrt->partial_resultset)
2859         {
2860             resp->resultSetStatus = odr_intdup(assoc->encode,
2861                                                Z_SearchResponse_subset);
2862         }
2863     }
2864     resp->additionalSearchInfo = bsrt->search_info;
2865
2866     if (log_request)
2867     {
2868         int i;
2869         WRBUF wr = wrbuf_alloc();
2870
2871         for (i = 0 ; i < req->num_databaseNames; i++)
2872         {
2873             if (i)
2874                 wrbuf_printf(wr, "+");
2875             wrbuf_puts(wr, req->databaseNames[i]);
2876         }
2877         wrbuf_printf(wr, " ");
2878
2879         if (bsrt->errcode)
2880             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2881         else
2882             wrbuf_printf(wr, "OK " ODR_INT_PRINTF, bsrt->hits);
2883         wrbuf_printf(wr, " %s 1+" ODR_INT_PRINTF " ",
2884                      req->resultSetName, returnedrecs);
2885         yaz_query_to_wrbuf(wr, req->query);
2886
2887         yaz_log(log_request, "Search %s", wrbuf_cstr(wr));
2888         wrbuf_destroy(wr);
2889     }
2890     return apdu;
2891 }
2892
2893 /*
2894  * Maybe we got a little over-friendly when we designed bend_fetch to
2895  * get only one record at a time. Some backends can optimise multiple-record
2896  * fetches, and at any rate, there is some overhead involved in
2897  * all that selecting and hopping around. Problem is, of course, that the
2898  * frontend can't know ahead of time how many records it'll need to
2899  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2900  * is downright lousy as a bulk data transfer protocol.
2901  *
2902  * To start with, we'll do the fetching of records from the backend
2903  * in one operation: To save some trips in and out of the event-handler,
2904  * and to simplify the interface to pack_records. At any rate, asynch
2905  * operation is more fun in operations that have an unpredictable execution
2906  * speed - which is normally more true for search than for present.
2907  */
2908 static Z_APDU *process_presentRequest(association *assoc, request *reqb)
2909 {
2910     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2911     Z_APDU *apdu;
2912     Z_PresentResponse *resp;
2913     Odr_int *next;
2914     Odr_int *num;
2915     int errcode = 0;
2916
2917     yaz_log(log_requestdetail, "Got PresentRequest.");
2918
2919     resp = (Z_PresentResponse *)odr_malloc(assoc->encode, sizeof(*resp));
2920     resp->records = 0;
2921     resp->presentStatus = odr_intdup(assoc->encode, 0);
2922     if (assoc->init->bend_present)
2923     {
2924         bend_present_rr *bprr = (bend_present_rr *)
2925             nmem_malloc(reqb->request_mem, sizeof(*bprr));
2926         bprr->setname = req->resultSetId;
2927         bprr->start = odr_int_to_int(*req->resultSetStartPoint);
2928         bprr->number = odr_int_to_int(*req->numberOfRecordsRequested);
2929         bprr->format = req->preferredRecordSyntax;
2930         bprr->comp = req->recordComposition;
2931         bprr->referenceId = req->referenceId;
2932         bprr->stream = assoc->encode;
2933         bprr->print = assoc->print;
2934         bprr->association = assoc;
2935         bprr->errcode = 0;
2936         bprr->errstring = NULL;
2937         (*assoc->init->bend_present)(assoc->backend, bprr);
2938
2939         if (bprr->errcode)
2940         {
2941             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2942             *resp->presentStatus = Z_PresentStatus_failure;
2943             errcode = bprr->errcode;
2944         }
2945     }
2946     apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2947     next = odr_intdup(assoc->encode, 0);
2948     num = odr_intdup(assoc->encode, 0);
2949
2950     apdu->which = Z_APDU_presentResponse;
2951     apdu->u.presentResponse = resp;
2952     resp->referenceId = req->referenceId;
2953     resp->otherInfo = 0;
2954
2955     if (!resp->records)
2956     {
2957         *num = *req->numberOfRecordsRequested;
2958         resp->records =
2959             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2960                          num, req->recordComposition, next,
2961                          resp->presentStatus,
2962                          req->referenceId, req->preferredRecordSyntax,
2963                          &errcode);
2964     }
2965     if (log_request)
2966     {
2967         WRBUF wr = wrbuf_alloc();
2968         wrbuf_printf(wr, "Present ");
2969
2970         if (*resp->presentStatus == Z_PresentStatus_failure)
2971             wrbuf_printf(wr, "ERROR %d ", errcode);
2972         else if (*resp->presentStatus == Z_PresentStatus_success)
2973             wrbuf_printf(wr, "OK -  ");
2974         else
2975             wrbuf_printf(wr, "Partial " ODR_INT_PRINTF " - ",
2976                          *resp->presentStatus);
2977
2978         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
2979                 req->resultSetId, *req->resultSetStartPoint,
2980                 *req->numberOfRecordsRequested);
2981         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
2982         wrbuf_destroy(wr);
2983     }
2984     if (!resp->records)
2985         return 0;
2986     resp->numberOfRecordsReturned = num;
2987     resp->nextResultSetPosition = next;
2988
2989     return apdu;
2990 }
2991
2992 /*
2993  * Scan was implemented rather in a hurry, and with support for only the basic
2994  * elements of the service in the backend API. Suggestions are welcome.
2995  */
2996 static Z_APDU *process_scanRequest(association *assoc, request *reqb)
2997 {
2998     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2999     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3000     Z_ScanResponse *res = (Z_ScanResponse *)
3001         odr_malloc(assoc->encode, sizeof(*res));
3002     Odr_int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
3003     Odr_int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
3004     Z_ListEntries *ents = (Z_ListEntries *)
3005         odr_malloc(assoc->encode, sizeof(*ents));
3006     Z_DiagRecs *diagrecs_p = NULL;
3007     bend_scan_rr *bsrr = (bend_scan_rr *)
3008         odr_malloc(assoc->encode, sizeof(*bsrr));
3009     struct scan_entry *save_entries;
3010     int step_size = 0;
3011
3012     yaz_log(log_requestdetail, "Got ScanRequest");
3013
3014     apdu->which = Z_APDU_scanResponse;
3015     apdu->u.scanResponse = res;
3016     res->referenceId = req->referenceId;
3017
3018     /* if step is absent, set it to 0 */
3019     if (req->stepSize)
3020         step_size = odr_int_to_int(*req->stepSize);
3021
3022     res->stepSize = 0;
3023     res->scanStatus = scanStatus;
3024     res->numberOfEntriesReturned = numberOfEntriesReturned;
3025     res->positionOfTerm = 0;
3026     res->entries = ents;
3027     ents->num_entries = 0;
3028     ents->entries = NULL;
3029     ents->num_nonsurrogateDiagnostics = 0;
3030     ents->nonsurrogateDiagnostics = NULL;
3031     res->attributeSet = 0;
3032     res->otherInfo = 0;
3033
3034     if (req->databaseNames)
3035     {
3036         int i;
3037         for (i = 0; i < req->num_databaseNames; i++)
3038             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
3039     }
3040     bsrr->scanClause = 0;
3041     bsrr->errcode = 0;
3042     bsrr->errstring = 0;
3043     bsrr->num_bases = req->num_databaseNames;
3044     bsrr->basenames = req->databaseNames;
3045     bsrr->num_entries = odr_int_to_int(*req->numberOfTermsRequested);
3046     bsrr->term = req->termListAndStartPoint;
3047     bsrr->referenceId = req->referenceId;
3048     bsrr->stream = assoc->encode;
3049     bsrr->print = assoc->print;
3050     bsrr->step_size = &step_size;
3051     bsrr->setname = yaz_oi_get_string_oid(&req->otherInfo,
3052                                           yaz_oid_userinfo_scan_set, 1, 0);
3053     bsrr->entries = 0;
3054     bsrr->extra_response_data = 0;
3055     /* For YAZ 2.0 and earlier it was the backend handler that
3056        initialized entries (member display_term did not exist)
3057        YAZ 2.0 and later sets 'entries'  and initialize all members
3058        including 'display_term'. If YAZ 2.0 or later sees that
3059        entries was modified - we assume that it is an old handler and
3060        that 'display_term' is _not_ set.
3061     */
3062     if (bsrr->num_entries > 0)
3063     {
3064         int i;
3065         bsrr->entries = (struct scan_entry *)
3066             odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3067                        bsrr->num_entries);
3068         for (i = 0; i<bsrr->num_entries; i++)
3069         {
3070             bsrr->entries[i].term = 0;
3071             bsrr->entries[i].occurrences = 0;
3072             bsrr->entries[i].errcode = 0;
3073             bsrr->entries[i].errstring = 0;
3074             bsrr->entries[i].display_term = 0;
3075         }
3076     }
3077     save_entries = bsrr->entries;  /* save it so we can compare later */
3078
3079     bsrr->attributeset = req->attributeSet;
3080     log_scan_term_level(log_requestdetail, req->termListAndStartPoint,
3081                         bsrr->attributeset);
3082     bsrr->term_position = req->preferredPositionInResponse ?
3083         odr_int_to_int(*req->preferredPositionInResponse) : 1;
3084
3085     ((int (*)(void *, bend_scan_rr *))
3086      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3087
3088     if (bsrr->errcode)
3089         diagrecs_p = zget_DiagRecs(assoc->encode,
3090                                    bsrr->errcode, bsrr->errstring);
3091     else
3092     {
3093         int i;
3094         Z_Entry **tab = (Z_Entry **)
3095             odr_malloc(assoc->encode, sizeof(*tab) * bsrr->num_entries);
3096
3097         if (bsrr->status == BEND_SCAN_PARTIAL)
3098             *scanStatus = Z_Scan_partial_5;
3099         else
3100             *scanStatus = Z_Scan_success;
3101         res->stepSize = odr_intdup(assoc->encode, step_size);
3102         ents->entries = tab;
3103         ents->num_entries = bsrr->num_entries;
3104         res->numberOfEntriesReturned = odr_intdup(assoc->encode,
3105                                                    ents->num_entries);
3106         res->positionOfTerm = odr_intdup(assoc->encode, bsrr->term_position);
3107         for (i = 0; i < bsrr->num_entries; i++)
3108         {
3109             Z_Entry *e;
3110             Z_TermInfo *t;
3111             Odr_oct *o;
3112
3113             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3114             if (bsrr->entries[i].occurrences >= 0)
3115             {
3116                 e->which = Z_Entry_termInfo;
3117                 e->u.termInfo = t = (Z_TermInfo *)
3118                     odr_malloc(assoc->encode, sizeof(*t));
3119                 t->suggestedAttributes = 0;
3120                 t->displayTerm = 0;
3121                 if (save_entries == bsrr->entries &&
3122                     bsrr->entries[i].display_term)
3123                 {
3124                     /* the entries was _not_ set by the handler. So it's
3125                        safe to test for new member display_term. It is
3126                        NULL'ed by us.
3127                     */
3128                     t->displayTerm = odr_strdup(assoc->encode,
3129                                                 bsrr->entries[i].display_term);
3130                 }
3131                 t->alternativeTerm = 0;
3132                 t->byAttributes = 0;
3133                 t->otherTermInfo = 0;
3134                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3135                 t->term = (Z_Term *)
3136                     odr_malloc(assoc->encode, sizeof(*t->term));
3137                 t->term->which = Z_Term_general;
3138                 t->term->u.general = o =
3139                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3140                 o->buf = (unsigned char *)
3141                     odr_malloc(assoc->encode, o->len = o->size =
3142                                strlen(bsrr->entries[i].term));
3143                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3144                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (" ODR_INT_PRINTF ")", i,
3145                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3146             }
3147             else
3148             {
3149                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3150                                                   bsrr->entries[i].errcode,
3151                                                   bsrr->entries[i].errstring);
3152                 assert(drecs->num_diagRecs == 1);
3153                 e->which = Z_Entry_surrogateDiagnostic;
3154                 assert(drecs->diagRecs[0]);
3155                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3156             }
3157         }
3158     }
3159     if (diagrecs_p)
3160     {
3161         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3162         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3163     }
3164     if (log_request)
3165     {
3166         int i;
3167         WRBUF wr = wrbuf_alloc();
3168         wrbuf_printf(wr, "Scan ");
3169         for (i = 0 ; i < req->num_databaseNames; i++)
3170         {
3171             if (i)
3172                 wrbuf_printf(wr, "+");
3173             wrbuf_puts(wr, req->databaseNames[i]);
3174         }
3175
3176         wrbuf_printf(wr, " ");
3177
3178         if (bsrr->errcode)
3179             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3180         else
3181             wrbuf_printf(wr, "OK");
3182
3183         wrbuf_printf(wr, " " ODR_INT_PRINTF " - " ODR_INT_PRINTF "+"
3184                      ODR_INT_PRINTF "+" ODR_INT_PRINTF,
3185                      res->numberOfEntriesReturned ?
3186                      *res->numberOfEntriesReturned : 0,
3187                      (req->preferredPositionInResponse ?
3188                       *req->preferredPositionInResponse : 1),
3189                      *req->numberOfTermsRequested,
3190                      (res->stepSize ? *res->stepSize : 1));
3191
3192         if (bsrr->setname)
3193             wrbuf_printf(wr, "+%s", bsrr->setname);
3194
3195         wrbuf_printf(wr, " ");
3196         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3197                           bsrr->attributeset);
3198         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3199         wrbuf_destroy(wr);
3200     }
3201     return apdu;
3202 }
3203
3204 static Z_APDU *process_sortRequest(association *assoc, request *reqb)
3205 {
3206     int i;
3207     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3208     Z_SortResponse *res = (Z_SortResponse *)
3209         odr_malloc(assoc->encode, sizeof(*res));
3210     bend_sort_rr *bsrr = (bend_sort_rr *)
3211         odr_malloc(assoc->encode, sizeof(*bsrr));
3212
3213     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3214
3215     yaz_log(log_requestdetail, "Got SortRequest.");
3216
3217     bsrr->num_input_setnames = req->num_inputResultSetNames;
3218     for (i=0;i<req->num_inputResultSetNames;i++)
3219         yaz_log(log_requestdetail, "Input resultset: '%s'",
3220                 req->inputResultSetNames[i]);
3221     bsrr->input_setnames = req->inputResultSetNames;
3222     bsrr->referenceId = req->referenceId;
3223     bsrr->output_setname = req->sortedResultSetName;
3224     yaz_log(log_requestdetail, "Output resultset: '%s'",
3225                 req->sortedResultSetName);
3226     bsrr->sort_sequence = req->sortSequence;
3227        /*FIXME - dump those sequences too */
3228     bsrr->stream = assoc->encode;
3229     bsrr->print = assoc->print;
3230
3231     bsrr->sort_status = Z_SortResponse_failure;
3232     bsrr->errcode = 0;
3233     bsrr->errstring = 0;
3234
3235     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3236
3237     res->referenceId = bsrr->referenceId;
3238     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3239     res->resultSetStatus = 0;
3240     if (bsrr->errcode)
3241     {
3242         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3243                                        bsrr->errcode, bsrr->errstring);
3244         res->diagnostics = dr->diagRecs;
3245         res->num_diagnostics = dr->num_diagRecs;
3246     }
3247     else
3248     {
3249         res->num_diagnostics = 0;
3250         res->diagnostics = 0;
3251     }
3252     res->resultCount = 0;
3253     res->otherInfo = 0;
3254
3255     apdu->which = Z_APDU_sortResponse;
3256     apdu->u.sortResponse = res;
3257     if (log_request)
3258     {
3259         WRBUF wr = wrbuf_alloc();
3260         wrbuf_printf(wr, "Sort ");
3261         if (bsrr->errcode)
3262             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3263         else
3264             wrbuf_printf(wr,  "OK -");
3265         wrbuf_printf(wr, " (");
3266         for (i = 0; i<req->num_inputResultSetNames; i++)
3267         {
3268             if (i)
3269                 wrbuf_printf(wr, "+");
3270             wrbuf_puts(wr, req->inputResultSetNames[i]);
3271         }
3272         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3273
3274         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3275         wrbuf_destroy(wr);
3276     }
3277     return apdu;
3278 }
3279
3280 static Z_APDU *process_deleteRequest(association *assoc, request *reqb)
3281 {
3282     int i;
3283     Z_DeleteResultSetRequest *req =
3284         reqb->apdu_request->u.deleteResultSetRequest;
3285     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3286         odr_malloc(assoc->encode, sizeof(*res));
3287     bend_delete_rr *bdrr = (bend_delete_rr *)
3288         odr_malloc(assoc->encode, sizeof(*bdrr));
3289     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3290
3291     yaz_log(log_requestdetail, "Got DeleteRequest.");
3292
3293     bdrr->num_setnames = req->num_resultSetList;
3294     bdrr->setnames = req->resultSetList;
3295     for (i = 0; i<req->num_resultSetList; i++)
3296         yaz_log(log_requestdetail, "resultset: '%s'",
3297                 req->resultSetList[i]);
3298     bdrr->stream = assoc->encode;
3299     bdrr->print = assoc->print;
3300     bdrr->function = odr_int_to_int(*req->deleteFunction);
3301     bdrr->referenceId = req->referenceId;
3302     bdrr->statuses = 0;
3303     if (bdrr->num_setnames > 0)
3304     {
3305         bdrr->statuses = (int*)
3306             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3307                        bdrr->num_setnames);
3308         for (i = 0; i < bdrr->num_setnames; i++)
3309             bdrr->statuses[i] = 0;
3310     }
3311     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3312
3313     res->referenceId = req->referenceId;
3314
3315     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3316
3317     res->deleteListStatuses = 0;
3318     if (bdrr->num_setnames > 0)
3319     {
3320         int i;
3321         res->deleteListStatuses = (Z_ListStatuses *)
3322             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3323         res->deleteListStatuses->num = bdrr->num_setnames;
3324         res->deleteListStatuses->elements =
3325             (Z_ListStatus **)
3326             odr_malloc(assoc->encode,
3327                         sizeof(*res->deleteListStatuses->elements) *
3328                         bdrr->num_setnames);
3329         for (i = 0; i<bdrr->num_setnames; i++)
3330         {
3331             res->deleteListStatuses->elements[i] =
3332                 (Z_ListStatus *)
3333                 odr_malloc(assoc->encode,
3334                             sizeof(**res->deleteListStatuses->elements));
3335             res->deleteListStatuses->elements[i]->status =
3336                 odr_intdup(assoc->encode, bdrr->statuses[i]);
3337             res->deleteListStatuses->elements[i]->id =
3338                 odr_strdup(assoc->encode, bdrr->setnames[i]);
3339         }
3340     }
3341     res->numberNotDeleted = 0;
3342     res->bulkStatuses = 0;
3343     res->deleteMessage = 0;
3344     res->otherInfo = 0;
3345
3346     apdu->which = Z_APDU_deleteResultSetResponse;
3347     apdu->u.deleteResultSetResponse = res;
3348     if (log_request)
3349     {
3350         WRBUF wr = wrbuf_alloc();
3351         wrbuf_printf(wr, "Delete ");
3352         if (bdrr->delete_status)
3353             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3354         else
3355             wrbuf_printf(wr, "OK -");
3356         for (i = 0; i<req->num_resultSetList; i++)
3357             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3358         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3359         wrbuf_destroy(wr);
3360     }
3361     return apdu;
3362 }
3363
3364 static void process_close(association *assoc, request *reqb)
3365 {
3366     Z_Close *req = reqb->apdu_request->u.close;
3367     static char *reasons[] =
3368     {
3369         "finished",
3370         "shutdown",
3371         "systemProblem",
3372         "costLimit",
3373         "resources",
3374         "securityViolation",
3375         "protocolError",
3376         "lackOfActivity",
3377         "peerAbort",
3378         "unspecified"
3379     };
3380
3381     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3382         reasons[*req->closeReason], req->diagnosticInformation ?
3383         req->diagnosticInformation : "NULL");
3384     if (assoc->version < 3) /* to make do_force respond with close */
3385         assoc->version = 3;
3386     do_close_req(assoc, Z_Close_finished,
3387                  "Association terminated by client", reqb);
3388     yaz_log(log_request,"Close OK");
3389 }
3390
3391 static Z_APDU *process_segmentRequest(association *assoc, request *reqb)
3392 {
3393     bend_segment_rr req;
3394
3395     req.segment = reqb->apdu_request->u.segmentRequest;
3396     req.stream = assoc->encode;
3397     req.decode = assoc->decode;
3398     req.print = assoc->print;
3399     req.association = assoc;
3400
3401     (*assoc->init->bend_segment)(assoc->backend, &req);
3402
3403     return 0;
3404 }
3405
3406 static Z_APDU *process_ESRequest(association *assoc, request *reqb)
3407 {
3408     bend_esrequest_rr esrequest;
3409     const char *ext_name = "unknown";
3410
3411     Z_ExtendedServicesRequest *req =
3412         reqb->apdu_request->u.extendedServicesRequest;
3413     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3414
3415     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3416
3417     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3418     esrequest.stream = assoc->encode;
3419     esrequest.decode = assoc->decode;
3420     esrequest.print = assoc->print;
3421     esrequest.errcode = 0;
3422     esrequest.errstring = NULL;
3423     esrequest.association = assoc;
3424     esrequest.taskPackage = 0;
3425     esrequest.referenceId = req->referenceId;
3426
3427     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3428     {
3429         switch(esrequest.esr->taskSpecificParameters->which)
3430         {
3431         case Z_External_itemOrder:
3432             ext_name = "ItemOrder"; break;
3433         case Z_External_update:
3434             ext_name = "Update"; break;
3435         case Z_External_update0:
3436             ext_name = "Update0"; break;
3437         case Z_External_ESAdmin:
3438             ext_name = "Admin"; break;
3439
3440         }
3441     }
3442
3443     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3444
3445     resp->referenceId = req->referenceId;
3446
3447     if (esrequest.errcode == -1)
3448     {
3449         /* Backend service indicates request will be processed */
3450         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3451         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3452     }
3453     else if (esrequest.errcode == 0)
3454     {
3455         /* Backend service indicates request will be processed */
3456         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3457         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3458     }
3459     else
3460     {
3461         Z_DiagRecs *diagRecs =
3462             zget_DiagRecs(assoc->encode, esrequest.errcode,
3463                           esrequest.errstring);
3464         /* Backend indicates error, request will not be processed */
3465         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3466         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3467         resp->num_diagnostics = diagRecs->num_diagRecs;
3468         resp->diagnostics = diagRecs->diagRecs;
3469         if (log_request)
3470         {
3471             WRBUF wr = wrbuf_alloc();
3472             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3473             yaz_log(log_request, "EsRequest %s", wrbuf_cstr(wr) );
3474             wrbuf_destroy(wr);
3475         }
3476
3477     }
3478     /* Do something with the members of bend_extendedservice */
3479     if (esrequest.taskPackage)
3480     {
3481         resp->taskPackage = z_ext_record_oid(
3482             assoc->encode, yaz_oid_recsyn_extended,
3483             (const char *)  esrequest.taskPackage, -1);
3484     }
3485     yaz_log(YLOG_DEBUG,"Send the result apdu");
3486     return apdu;
3487 }
3488
3489 int bend_assoc_is_alive(bend_association assoc)
3490 {
3491     if (assoc->state == ASSOC_DEAD)
3492         return 0; /* already marked as dead. Don't check I/O chan anymore */
3493
3494     return iochan_is_alive(assoc->client_chan);
3495 }
3496
3497
3498 /*
3499  * Local variables:
3500  * c-basic-offset: 4
3501  * c-file-style: "Stroustrup"
3502  * indent-tabs-mode: nil
3503  * End:
3504  * vim: shiftwidth=4 tabstop=8 expandtab
3505  */
3506