src/seshigh.c

   1 /* This file is part of the YAZ toolkit.
   2  * Copyright (C) 1995-2008 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
  29 #include <stdlib.h>
  30 #include <stdio.h>
  31 #include <assert.h>
  32 #include <ctype.h>
  33
  34 #if HAVE_SYS_TYPES_H
  35 #include <sys/types.h>
  36 #endif
  37 #if HAVE_SYS_STAT_H
  38 #include <sys/stat.h>
  39 #endif
  40
  41 #ifdef WIN32
  42 #include <io.h>
  43 #define S_ISREG(x) (x & _S_IFREG)
  44 #include <process.h>
  45 #endif
  46
  47 #if HAVE_UNISTD_H
  48 #include <unistd.h>
  49 #endif
  50
  51 #if YAZ_HAVE_XML2
  52 #include <libxml/parser.h>
  53 #include <libxml/tree.h>
  54 #endif
  55
  56 #include <yaz/yconfig.h>
  57 #include <yaz/xmalloc.h>
  58 #include <yaz/comstack.h>
  59 #include "eventl.h"
  60 #include "session.h"
  61 #include "mime.h"
  62 #include <yaz/proto.h>
  63 #include <yaz/oid_db.h>
  64 #include <yaz/log.h>
  65 #include <yaz/logrpn.h>
  66 #include <yaz/querytowrbuf.h>
  67 #include <yaz/statserv.h>
  68 #include <yaz/diagbib1.h>
  69 #include <yaz/charneg.h>
  70 #include <yaz/otherinfo.h>
  71 #include <yaz/yaz-util.h>
  72 #include <yaz/pquery.h>
  73 #include <yaz/oid_db.h>
  74
  75 #include <yaz/srw.h>
  76 #include <yaz/backend.h>
  77 #include <yaz/yaz-ccl.h>
  78
  79 static void process_gdu_request(association *assoc, request *req);
  80 static int process_z_request(association *assoc, request *req, char **msg);
  81 void backend_response(IOCHAN i, int event);
  82 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  83 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  84 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  85 static Z_External *init_diagnostics(ODR odr, int errcode,
  86                                     const char *errstring);
  87 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
  88     int *fd);
  89 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  90     bend_search_rr *bsrr, int *fd);
  91 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
  92     int *fd);
  93 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
  94 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
  95 static void process_close(association *assoc, request *reqb);
  96 void save_referenceId(request *reqb, Z_ReferenceId *refid);
  97 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
  98     int *fd);
  99 static Z_APDU *process_segmentRequest(association *assoc, request *reqb);
 100
 101 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
 102
 103 /* dynamic logging levels */
 104 static int logbits_set = 0;
 105 static int log_session = 0; /* one-line logs for session */
 106 static int log_sessiondetail = 0; /* more detailed stuff */
 107 static int log_request = 0; /* one-line logs for requests */
 108 static int log_requestdetail = 0;  /* more detailed stuff */
 109
 110 /** get_logbits sets global loglevel bits */
 111 static void get_logbits(void)
 112 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 113     if (!logbits_set)
 114     {
 115         logbits_set = 1;
 116         log_session = yaz_log_module_level("session");
 117         log_sessiondetail = yaz_log_module_level("sessiondetail");
 118         log_request = yaz_log_module_level("request");
 119         log_requestdetail = yaz_log_module_level("requestdetail");
 120     }
 121 }
 122
 123
 124
 125 static void wr_diag(WRBUF w, int error, const char *addinfo)
 126 {
 127     wrbuf_printf(w, "ERROR %d+", error);
 128     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
 129     if (addinfo){
 130         wrbuf_puts(w, "+");
 131         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
 132     }
 133
 134     wrbuf_puts(w, " ");
 135 }
 136
 137
 138 /*
 139  * Create and initialize a new association-handle.
 140  *  channel  : iochannel for the current line.
 141  *  link     : communications channel.
 142  * Returns: 0 or a new association handle.
 143  */
 144 association *create_association(IOCHAN channel, COMSTACK link,
 145                                 const char *apdufile)
 146 {
 147     association *anew;
 148
 149     if (!logbits_set)
 150         get_logbits();
 151     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 152         return 0;
 153     anew->init = 0;
 154     anew->version = 0;
 155     anew->last_control = 0;
 156     anew->client_chan = channel;
 157     anew->client_link = link;
 158     anew->cs_get_mask = 0;
 159     anew->cs_put_mask = 0;
 160     anew->cs_accept_mask = 0;
 161     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 162         !(anew->encode = odr_createmem(ODR_ENCODE)))
 163         return 0;
 164     if (apdufile && *apdufile)
 165     {
 166         FILE *f;
 167
 168         if (!(anew->print = odr_createmem(ODR_PRINT)))
 169             return 0;
 170         if (*apdufile == '@')
 171         {
 172             odr_setprint(anew->print, yaz_log_file());
 173         }
 174         else if (*apdufile != '-')
 175         {
 176             char filename[256];
 177             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 178             if (!(f = fopen(filename, "w")))
 179             {
 180                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 181                 return 0;
 182             }
 183             setvbuf(f, 0, _IONBF, 0);
 184             odr_setprint(anew->print, f);
 185         }
 186     }
 187     else
 188         anew->print = 0;
 189     anew->input_buffer = 0;
 190     anew->input_buffer_len = 0;
 191     anew->backend = 0;
 192     anew->state = ASSOC_NEW;
 193     request_initq(&anew->incoming);
 194     request_initq(&anew->outgoing);
 195     anew->proto = cs_getproto(link);
 196     anew->server = 0;
 197     return anew;
 198 }
 199
 200 /*
 201  * Free association and release resources.
 202  */
 203 void destroy_association(association *h)
 204 {
 205     statserv_options_block *cb = statserv_getcontrol();
 206     request *req;
 207
 208     xfree(h->init);
 209     odr_destroy(h->decode);
 210     odr_destroy(h->encode);
 211     if (h->print)
 212         odr_destroy(h->print);
 213     if (h->input_buffer)
 214     xfree(h->input_buffer);
 215     if (h->backend)
 216         (*cb->bend_close)(h->backend);
 217     while ((req = request_deq(&h->incoming)))
 218         request_release(req);
 219     while ((req = request_deq(&h->outgoing)))
 220         request_release(req);
 221     request_delq(&h->incoming);
 222     request_delq(&h->outgoing);
 223     xfree(h);
 224     xmalloc_trav("session closed");
 225     if (cb && cb->one_shot)
 226     {
 227         exit(0);
 228     }
 229 }
 230
 231 static void do_close_req(association *a, int reason, char *message,
 232                          request *req)
 233 {
 234     Z_APDU apdu;
 235     Z_Close *cls = zget_Close(a->encode);
 236
 237     /* Purge request queue */
 238     while (request_deq(&a->incoming));
 239     while (request_deq(&a->outgoing));
 240     if (a->version >= 3)
 241     {
 242         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 243             reason, message ? message : "none");
 244         apdu.which = Z_APDU_close;
 245         apdu.u.close = cls;
 246         *cls->closeReason = reason;
 247         cls->diagnosticInformation = message;
 248         process_z_response(a, req, &apdu);
 249         iochan_settimeout(a->client_chan, 20);
 250     }
 251     else
 252     {
 253         request_release(req);
 254         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 255         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 256         a->cs_put_mask = 0;
 257     }
 258     a->state = ASSOC_DEAD;
 259 }
 260
 261 static void do_close(association *a, int reason, char *message)
 262 {
 263     request *req = request_get(&a->outgoing);
 264     do_close_req (a, reason, message, req);
 265 }
 266
 267
 268 int ir_read(IOCHAN h, int event)
 269 {
 270     association *assoc = (association *)iochan_getdata(h);
 271     COMSTACK conn = assoc->client_link;
 272     request *req;
 273
 274     if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 275     {
 276         yaz_log(YLOG_DEBUG, "ir_session (input)");
 277         /* We aren't speaking to this fellow */
 278         if (assoc->state == ASSOC_DEAD)
 279         {
 280             yaz_log(log_sessiondetail, "Connection closed - end of session");
 281             cs_close(conn);
 282             destroy_association(assoc);
 283             iochan_destroy(h);
 284             return 0;
 285         }
 286         assoc->cs_get_mask = EVENT_INPUT;
 287
 288         do
 289         {
 290             int res = cs_get(conn, &assoc->input_buffer,
 291                              &assoc->input_buffer_len);
 292             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 293             {
 294                 yaz_log(log_session, "Connection error: %s res=%d",
 295                         cs_errmsg(cs_errno(conn)), res);
 296                 req = request_get(&assoc->incoming); /* get a new request */
 297                 do_close_req(assoc, Z_Close_protocolError,
 298                              "Incoming package too large", req);
 299                 return 0;
 300             }
 301             else if (res <= 0)
 302             {
 303                 yaz_log(log_session, "Connection closed by client");
 304                 assoc->state = ASSOC_DEAD;
 305                 return 0;
 306             }
 307             else if (res == 1) /* incomplete read - wait for more  */
 308             {
 309                 if (conn->io_pending & CS_WANT_WRITE)
 310                     assoc->cs_get_mask |= EVENT_OUTPUT;
 311                 iochan_setflag(h, assoc->cs_get_mask);
 312                 return 0;
 313             }
 314             /* we got a complete PDU. Let's decode it */
 315             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 316                     assoc->input_buffer[0] & 0xff,
 317                     assoc->input_buffer[1] & 0xff,
 318                     assoc->input_buffer[2] & 0xff);
 319             req = request_get(&assoc->incoming); /* get a new request */
 320             odr_reset(assoc->decode);
 321             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 322             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 323             {
 324                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 325                         "[near byte %ld] ",
 326                         odr_errmsg(odr_geterror(assoc->decode)),
 327                         odr_getelement(assoc->decode),
 328                         (long) odr_offset(assoc->decode));
 329                 if (assoc->decode->error != OHTTP)
 330                 {
 331                     yaz_log(YLOG_WARN, "PDU dump:");
 332                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 333                     request_release(req);
 334                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 335                 }
 336                 else
 337                 {
 338                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 339                     assoc->state = ASSOC_DEAD;
 340                     process_gdu_response(assoc, req, p);
 341                 }
 342                 return 0;
 343             }
 344             req->request_mem = odr_extract_mem(assoc->decode);
 345             if (assoc->print)
 346             {
 347                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 348                     yaz_log(YLOG_WARN, "ODR print error: %s",
 349                             odr_errmsg(odr_geterror(assoc->print)));
 350                 odr_reset(assoc->print);
 351             }
 352             request_enq(&assoc->incoming, req);
 353         }
 354         while (cs_more(conn));
 355     }
 356     return 1;
 357 }
 358
 359 /*
 360  * This is where PDUs from the client are read and the further
 361  * processing is initiated. Flow of control moves down through the
 362  * various process_* functions below, until the encoded result comes back up
 363  * to the output handler in here.
 364  *
 365  *  h     : the I/O channel that has an outstanding event.
 366  *  event : the current outstanding event.
 367  */
 368 void ir_session(IOCHAN h, int event)
 369 {
 370     int res;
 371     association *assoc = (association *)iochan_getdata(h);
 372     COMSTACK conn = assoc->client_link;
 373     request *req;
 374
 375     assert(h && conn && assoc);
 376     if (event == EVENT_TIMEOUT)
 377     {
 378         if (assoc->state != ASSOC_UP)
 379         {
 380             yaz_log(YLOG_DEBUG, "Final timeout - closing connection.");
 381             /* do we need to lod this at all */
 382             cs_close(conn);
 383             destroy_association(assoc);
 384             iochan_destroy(h);
 385         }
 386         else
 387         {
 388             yaz_log(log_sessiondetail,
 389                     "Session idle too long. Sending close.");
 390             do_close(assoc, Z_Close_lackOfActivity, 0);
 391         }
 392         return;
 393     }
 394     if (event & assoc->cs_accept_mask)
 395     {
 396         if (!cs_accept(conn))
 397         {
 398             yaz_log(YLOG_WARN, "accept failed");
 399             destroy_association(assoc);
 400             iochan_destroy(h);
 401             return;
 402         }
 403         iochan_clearflag(h, EVENT_OUTPUT);
 404         if (conn->io_pending)
 405         {   /* cs_accept didn't complete */
 406             assoc->cs_accept_mask =
 407                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 408                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 409
 410             iochan_setflag(h, assoc->cs_accept_mask);
 411         }
 412         else
 413         {   /* cs_accept completed. Prepare for reading (cs_get) */
 414             assoc->cs_accept_mask = 0;
 415             assoc->cs_get_mask = EVENT_INPUT;
 416             iochan_setflag(h, assoc->cs_get_mask);
 417         }
 418         return;
 419     }
 420     if (event & assoc->cs_get_mask) /* input */
 421     {
 422         if (!ir_read(h, event))
 423             return;
 424         req = request_head(&assoc->incoming);
 425         if (req->state == REQUEST_IDLE)
 426         {
 427             request_deq(&assoc->incoming);
 428             process_gdu_request(assoc, req);
 429         }
 430     }
 431     if (event & assoc->cs_put_mask)
 432     {
 433         request *req = request_head(&assoc->outgoing);
 434
 435         assoc->cs_put_mask = 0;
 436         yaz_log(YLOG_DEBUG, "ir_session (output)");
 437         req->state = REQUEST_PENDING;
 438         switch (res = cs_put(conn, req->response, req->len_response))
 439         {
 440         case -1:
 441             yaz_log(log_sessiondetail, "Connection closed by client");
 442             cs_close(conn);
 443             destroy_association(assoc);
 444             iochan_destroy(h);
 445             break;
 446         case 0: /* all sent - release the request structure */
 447             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 448 #if 0
 449             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 450                     req->response);
 451 #endif
 452             nmem_destroy(req->request_mem);
 453             request_deq(&assoc->outgoing);
 454             request_release(req);
 455             if (!request_head(&assoc->outgoing))
 456             {   /* restore mask for cs_get operation ... */
 457                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 458                 iochan_setflag(h, assoc->cs_get_mask);
 459                 if (assoc->state == ASSOC_DEAD)
 460                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 461             }
 462             else
 463             {
 464                 assoc->cs_put_mask = EVENT_OUTPUT;
 465             }
 466             break;
 467         default:
 468             if (conn->io_pending & CS_WANT_WRITE)
 469                 assoc->cs_put_mask |= EVENT_OUTPUT;
 470             if (conn->io_pending & CS_WANT_READ)
 471                 assoc->cs_put_mask |= EVENT_INPUT;
 472             iochan_setflag(h, assoc->cs_put_mask);
 473         }
 474     }
 475     if (event & EVENT_EXCEPT)
 476     {
 477         yaz_log(YLOG_WARN, "ir_session (exception)");
 478         cs_close(conn);
 479         destroy_association(assoc);
 480         iochan_destroy(h);
 481     }
 482 }
 483
 484 static int process_z_request(association *assoc, request *req, char **msg);
 485
 486
 487 static void assoc_init_reset(association *assoc)
 488 {
 489     xfree (assoc->init);
 490     assoc->init = (bend_initrequest *) xmalloc(sizeof(*assoc->init));
 491
 492     assoc->init->stream = assoc->encode;
 493     assoc->init->print = assoc->print;
 494     assoc->init->auth = 0;
 495     assoc->init->referenceId = 0;
 496     assoc->init->implementation_version = 0;
 497     assoc->init->implementation_id = 0;
 498     assoc->init->implementation_name = 0;
 499     assoc->init->query_charset = 0;
 500     assoc->init->records_in_same_charset = 0;
 501     assoc->init->bend_sort = NULL;
 502     assoc->init->bend_search = NULL;
 503     assoc->init->bend_present = NULL;
 504     assoc->init->bend_esrequest = NULL;
 505     assoc->init->bend_delete = NULL;
 506     assoc->init->bend_scan = NULL;
 507     assoc->init->bend_segment = NULL;
 508     assoc->init->bend_fetch = NULL;
 509     assoc->init->bend_explain = NULL;
 510     assoc->init->bend_srw_scan = NULL;
 511     assoc->init->bend_srw_update = NULL;
 512
 513     assoc->init->charneg_request = NULL;
 514     assoc->init->charneg_response = NULL;
 515
 516     assoc->init->decode = assoc->decode;
 517     assoc->init->peer_name =
 518         odr_strdup(assoc->encode, cs_addrstr(assoc->client_link));
 519
 520     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 521 }
 522
 523 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 524 {
 525     statserv_options_block *cb = statserv_getcontrol();
 526     if (!assoc->init)
 527     {
 528         const char *encoding = "UTF-8";
 529         Z_External *ce;
 530         bend_initresult *binitres;
 531
 532         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 533         assoc_init_reset(assoc);
 534
 535         if (sr->username)
 536         {
 537             Z_IdAuthentication *auth = (Z_IdAuthentication *)
 538                 odr_malloc(assoc->decode, sizeof(*auth));
 539             int len;
 540
 541             len = strlen(sr->username) + 1;
 542             if (sr->password)
 543                 len += strlen(sr->password) + 2;
 544             auth->which = Z_IdAuthentication_open;
 545             auth->u.open = (char *) odr_malloc(assoc->decode, len);
 546             strcpy(auth->u.open, sr->username);
 547             if (sr->password && *sr->password)
 548             {
 549                 strcat(auth->u.open, "/");
 550                 strcat(auth->u.open, sr->password);
 551             }
 552             assoc->init->auth = auth;
 553         }
 554
 555 #if 1
 556         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 557         assoc->init->charneg_request = ce->u.charNeg3;
 558 #endif
 559         assoc->backend = 0;
 560         if (!(binitres = (*cb->bend_init)(assoc->init)))
 561         {
 562             assoc->state = ASSOC_DEAD;
 563             yaz_add_srw_diagnostic(assoc->encode, d, num,
 564                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 565             return 0;
 566         }
 567         assoc->backend = binitres->handle;
 568         assoc->init->auth = 0;
 569         if (binitres->errcode)
 570         {
 571             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 572             assoc->state = ASSOC_DEAD;
 573             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 574                                    binitres->errstring);
 575             return 0;
 576         }
 577         return 1;
 578     }
 579     return 1;
 580 }
 581
 582 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 583 {
 584 #if YAZ_HAVE_XML2
 585     yaz_record_conv_t rc = 0;
 586     const char *match_schema = 0;
 587     Odr_oid *match_syntax = 0;
 588
 589     if (assoc->server)
 590     {
 591         int r;
 592         const char *input_schema = yaz_get_esn(rr->comp);
 593         Odr_oid *input_syntax_raw = rr->request_format;
 594
 595         const char *backend_schema = 0;
 596         Odr_oid *backend_syntax = 0;
 597
 598         r = yaz_retrieval_request(assoc->server->retrieval,
 599                                   input_schema,
 600                                   input_syntax_raw,
 601                                   &match_schema,
 602                                   &match_syntax,
 603                                   &rc,
 604                                   &backend_schema,
 605                                   &backend_syntax);
 606         if (r == -1) /* error ? */
 607         {
 608             const char *details = yaz_retrieval_get_error(
 609                 assoc->server->retrieval);
 610
 611             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 612             if (details)
 613                 rr->errstring = odr_strdup(rr->stream, details);
 614             return -1;
 615         }
 616         else if (r == 1 || r == 3)
 617         {
 618             const char *details = input_schema;
 619             rr->errcode =
 620                 YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
 621             if (details)
 622                 rr->errstring = odr_strdup(rr->stream, details);
 623             return -1;
 624         }
 625         else if (r == 2)
 626         {
 627             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 628             if (input_syntax_raw)
 629             {
 630                 char oidbuf[OID_STR_MAX];
 631                 oid_oid_to_dotstring(input_syntax_raw, oidbuf);
 632                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 633             }
 634             return -1;
 635         }
 636         if (backend_schema)
 637         {
 638             yaz_set_esn(&rr->comp, backend_schema, odr_getmem(rr->stream));
 639         }
 640         if (backend_syntax)
 641             rr->request_format = backend_syntax;
 642     }
 643     (*assoc->init->bend_fetch)(assoc->backend, rr);
 644     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
 645     {   /* post conversion must take place .. */
 646         WRBUF output_record = wrbuf_alloc();
 647         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 648         if (r)
 649         {
 650             const char *details = yaz_record_conv_get_error(rc);
 651             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 652             if (details)
 653                 rr->errstring = odr_strdup(rr->stream, details);
 654         }
 655         else
 656         {
 657             rr->len = wrbuf_len(output_record);
 658             rr->record = (char *) odr_malloc(rr->stream, rr->len);
 659             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 660         }
 661         wrbuf_destroy(output_record);
 662     }
 663     if (match_syntax)
 664         rr->output_format = match_syntax;
 665     if (match_schema)
 666         rr->schema = odr_strdup(rr->stream, match_schema);
 667     return 0;
 668 #else
 669     (*assoc->init->bend_fetch)(assoc->backend, rr);
 670 #endif
 671     return 0;
 672 }
 673
 674 static int srw_bend_fetch(association *assoc, int pos,
 675                           Z_SRW_searchRetrieveRequest *srw_req,
 676                           Z_SRW_record *record,
 677                           const char **addinfo)
 678 {
 679     bend_fetch_rr rr;
 680     ODR o = assoc->encode;
 681
 682     rr.setname = "default";
 683     rr.number = pos;
 684     rr.referenceId = 0;
 685     rr.request_format = odr_oiddup(assoc->decode, yaz_oid_recsyn_xml);
 686
 687     rr.comp = (Z_RecordComposition *)
 688             odr_malloc(assoc->decode, sizeof(*rr.comp));
 689     rr.comp->which = Z_RecordComp_complex;
 690     rr.comp->u.complex = (Z_CompSpec *)
 691             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 692     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 693         odr_malloc(assoc->encode, sizeof(bool_t));
 694     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 695     rr.comp->u.complex->num_dbSpecific = 0;
 696     rr.comp->u.complex->dbSpecific = 0;
 697     rr.comp->u.complex->num_recordSyntax = 0;
 698     rr.comp->u.complex->recordSyntax = 0;
 699
 700     rr.comp->u.complex->generic = (Z_Specification *)
 701             odr_malloc(assoc->decode, sizeof(Z_Specification));
 702
 703     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 704     rr.comp->u.complex->generic->which = Z_Schema_uri;
 705     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 706
 707     /* ESN = recordSchema if recordSchema is present */
 708     rr.comp->u.complex->generic->elementSpec = 0;
 709     if (srw_req->recordSchema)
 710     {
 711         rr.comp->u.complex->generic->elementSpec =
 712             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 713         rr.comp->u.complex->generic->elementSpec->which =
 714             Z_ElementSpec_elementSetName;
 715         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 716             srw_req->recordSchema;
 717     }
 718
 719     rr.stream = assoc->encode;
 720     rr.print = assoc->print;
 721
 722     rr.basename = 0;
 723     rr.len = 0;
 724     rr.record = 0;
 725     rr.last_in_set = 0;
 726     rr.errcode = 0;
 727     rr.errstring = 0;
 728     rr.surrogate_flag = 0;
 729     rr.schema = srw_req->recordSchema;
 730
 731     if (!assoc->init->bend_fetch)
 732         return 1;
 733
 734     retrieve_fetch(assoc, &rr);
 735
 736     if (rr.errcode && rr.surrogate_flag)
 737     {
 738         int code = yaz_diag_bib1_to_srw(rr.errcode);
 739         yaz_mk_sru_surrogate(o, record, pos, code, rr.errstring);
 740         return 0;
 741     }
 742     else if (rr.len >= 0)
 743     {
 744         record->recordData_buf = rr.record;
 745         record->recordData_len = rr.len;
 746         record->recordPosition = odr_intdup(o, pos);
 747         record->recordSchema = odr_strdup_null(
 748             o, rr.schema ? rr.schema : srw_req->recordSchema);
 749     }
 750     if (rr.errcode)
 751     {
 752         *addinfo = rr.errstring;
 753         return rr.errcode;
 754     }
 755     return 0;
 756 }
 757
 758 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 759                    Z_Query *query_result)
 760 {
 761     /* have a CQL query and  CQL to PQF transform .. */
 762     CQL_parser cp = cql_parser_create();
 763     int r;
 764     int srw_errcode = 0;
 765     const char *add = 0;
 766     char rpn_buf[5120];
 767
 768     r = cql_parser_string(cp, cql);
 769     if (r)
 770     {
 771         srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 772     }
 773     if (!r)
 774     {
 775         /* Syntax OK */
 776         r = cql_transform_buf(ct,
 777                               cql_parser_result(cp),
 778                               rpn_buf, sizeof(rpn_buf)-1);
 779         if (r)
 780             srw_errcode = cql_transform_error(ct, &add);
 781     }
 782     if (!r)
 783     {
 784         /* Syntax & transform OK. */
 785         /* Convert PQF string to Z39.50 to RPN query struct */
 786         YAZ_PQF_Parser pp = yaz_pqf_create();
 787         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 788         if (!rpnquery)
 789         {
 790             size_t off;
 791             const char *pqf_msg;
 792             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 793             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 794                     pqf_msg, code);
 795             srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 796         }
 797         else
 798         {
 799             query_result->which = Z_Query_type_1;
 800             query_result->u.type_1 = rpnquery;
 801         }
 802         yaz_pqf_destroy(pp);
 803     }
 804     cql_parser_destroy(cp);
 805     return srw_errcode;
 806 }
 807
 808 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 809                         Z_AttributesPlusTerm *result)
 810 {
 811     Z_Query query;
 812     Z_RPNQuery *rpn;
 813     int srw_error = cql2pqf(odr, cql, ct, &query);
 814     if (srw_error)
 815         return srw_error;
 816     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 817         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* bad query type */
 818     rpn = query.u.type_1;
 819     if (!rpn->RPNStructure)
 820         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be structure */
 821     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 822         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be simple */
 823     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 824         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be be attributes + term */
 825     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 826            sizeof(*result));
 827     return 0;
 828 }
 829
 830
 831 static int ccl2pqf(ODR odr, const Odr_oct *ccl, CCL_bibset bibset,
 832                    bend_search_rr *bsrr) {
 833     char *ccl0;
 834     struct ccl_rpn_node *node;
 835     int errcode, pos;
 836
 837     ccl0 = odr_strdupn(odr, (char*) ccl->buf, ccl->len);
 838     if ((node = ccl_find_str(bibset, ccl0, &errcode, &pos)) == 0) {
 839         bsrr->errstring = (char*) ccl_err_msg(errcode);
 840         return YAZ_SRW_QUERY_SYNTAX_ERROR;    /* Query syntax error */
 841     }
 842
 843     bsrr->query->which = Z_Query_type_1;
 844     bsrr->query->u.type_1 = ccl_rpn_query(odr, node);
 845     return 0;
 846 }
 847
 848
 849 static void srw_bend_search(association *assoc, request *req,
 850                             Z_SRW_PDU *sr,
 851                             Z_SRW_searchRetrieveResponse *srw_res,
 852                             int *http_code)
 853 {
 854     int srw_error = 0;
 855     Z_External *ext;
 856     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 857
 858     *http_code = 200;
 859     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 860     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 861     if (srw_res->num_diagnostics == 0 && assoc->init)
 862     {
 863         bend_search_rr rr;
 864         rr.setname = "default";
 865         rr.replace_set = 1;
 866         rr.num_bases = 1;
 867         rr.basenames = &srw_req->database;
 868         rr.referenceId = 0;
 869         rr.srw_sortKeys = 0;
 870         rr.srw_setname = 0;
 871         rr.srw_setnameIdleTime = 0;
 872         rr.estimated_hit_count = 0;
 873         rr.partial_resultset = 0;
 874         rr.query = (Z_Query *) odr_malloc(assoc->decode, sizeof(*rr.query));
 875         rr.query->u.type_1 = 0;
 876
 877         if (srw_req->query_type == Z_SRW_query_type_cql)
 878         {
 879             if (assoc->server && assoc->server->cql_transform)
 880             {
 881                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 882                                           assoc->server->cql_transform,
 883                                           rr.query);
 884                 if (srw_errcode)
 885                 {
 886                     yaz_add_srw_diagnostic(assoc->encode,
 887                                            &srw_res->diagnostics,
 888                                            &srw_res->num_diagnostics,
 889                                            srw_errcode, 0);
 890                 }
 891             }
 892             else
 893             {
 894                 /* CQL query to backend. Wrap it - Z39.50 style */
 895                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 896                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 897                                                         "1.2.840.10003.16.2");
 898                 ext->indirect_reference = 0;
 899                 ext->descriptor = 0;
 900                 ext->which = Z_External_CQL;
 901                 ext->u.cql = srw_req->query.cql;
 902
 903                 rr.query->which = Z_Query_type_104;
 904                 rr.query->u.type_104 =  ext;
 905             }
 906         }
 907         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 908         {
 909             Z_RPNQuery *RPNquery;
 910             YAZ_PQF_Parser pqf_parser;
 911
 912             pqf_parser = yaz_pqf_create();
 913
 914             RPNquery = yaz_pqf_parse(pqf_parser, assoc->decode,
 915                                      srw_req->query.pqf);
 916             if (!RPNquery)
 917             {
 918                 const char *pqf_msg;
 919                 size_t off;
 920                 int code = yaz_pqf_error(pqf_parser, &pqf_msg, &off);
 921                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 922                         code, pqf_msg, (long) off);
 923                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 924             }
 925
 926             rr.query->which = Z_Query_type_1;
 927             rr.query->u.type_1 =  RPNquery;
 928
 929             yaz_pqf_destroy(pqf_parser);
 930         }
 931         else
 932         {
 933             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 934                                    &srw_res->num_diagnostics,
 935                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 936         }
 937         if (rr.query->u.type_1)
 938         {
 939             rr.stream = assoc->encode;
 940             rr.decode = assoc->decode;
 941             rr.print = assoc->print;
 942             rr.request = req;
 943             if ( srw_req->sort.sortKeys )
 944                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 945                                              srw_req->sort.sortKeys );
 946             rr.association = assoc;
 947             rr.fd = 0;
 948             rr.hits = 0;
 949             rr.errcode = 0;
 950             rr.errstring = 0;
 951             rr.search_info = 0;
 952             yaz_log_zquery_level(log_requestdetail,rr.query);
 953
 954             (assoc->init->bend_search)(assoc->backend, &rr);
 955             if (rr.errcode)
 956             {
 957                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 958                 {
 959                     *http_code = 404;
 960                 }
 961                 else
 962                 {
 963                     srw_error = yaz_diag_bib1_to_srw(rr.errcode);
 964                     yaz_add_srw_diagnostic(assoc->encode,
 965                                            &srw_res->diagnostics,
 966                                            &srw_res->num_diagnostics,
 967                                            srw_error, rr.errstring);
 968                 }
 969             }
 970             else
 971             {
 972                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
 973                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
 974
 975                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
 976                         start, number, rr.hits);
 977
 978                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 979                 if (rr.srw_setname)
 980                 {
 981                     srw_res->resultSetId =
 982                         odr_strdup(assoc->encode, rr.srw_setname );
 983                     srw_res->resultSetIdleTime =
 984                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
 985                 }
 986
 987                 if (start > rr.hits || start < 1)
 988                 {
 989                     /* if hits<=0 and start=1 we don't return a diagnostic */
 990                     if (start != 1)
 991                         yaz_add_srw_diagnostic(
 992                             assoc->encode,
 993                             &srw_res->diagnostics, &srw_res->num_diagnostics,
 994                             YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
 995                 }
 996                 else if (number > 0)
 997                 {
 998                     int i;
 999                     int ok = 1;
1000                     if (start + number > rr.hits)
1001                         number = rr.hits - start + 1;
1002
1003                     /* Call bend_present if defined */
1004                     if (assoc->init->bend_present)
1005                     {
1006                         bend_present_rr *bprr = (bend_present_rr*)
1007                             odr_malloc(assoc->decode, sizeof(*bprr));
1008                         bprr->setname = "default";
1009                         bprr->start = start;
1010                         bprr->number = number;
1011                         if (srw_req->recordSchema)
1012                         {
1013                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1014                                                                             sizeof(*bprr->comp));
1015                             bprr->comp->which = Z_RecordComp_simple;
1016                             bprr->comp->u.simple = (Z_ElementSetNames *)
1017                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1018                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1019                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1020                         }
1021                         else
1022                         {
1023                             bprr->comp = 0;
1024                         }
1025                         bprr->stream = assoc->encode;
1026                         bprr->referenceId = 0;
1027                         bprr->print = assoc->print;
1028                         bprr->request = req;
1029                         bprr->association = assoc;
1030                         bprr->errcode = 0;
1031                         bprr->errstring = NULL;
1032                         (*assoc->init->bend_present)(assoc->backend, bprr);
1033
1034                         if (!bprr->request)
1035                             return;
1036                         if (bprr->errcode)
1037                         {
1038                             srw_error = yaz_diag_bib1_to_srw(bprr->errcode);
1039                             yaz_add_srw_diagnostic(assoc->encode,
1040                                                    &srw_res->diagnostics,
1041                                                    &srw_res->num_diagnostics,
1042                                                    srw_error, bprr->errstring);
1043                             ok = 0;
1044                         }
1045                     }
1046
1047                     if (ok)
1048                     {
1049                         int j = 0;
1050                         int packing = Z_SRW_recordPacking_string;
1051                         if (srw_req->recordPacking)
1052                         {
1053                             packing =
1054                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1055                             if (packing == -1)
1056                                 packing = Z_SRW_recordPacking_string;
1057                         }
1058                         srw_res->records = (Z_SRW_record *)
1059                             odr_malloc(assoc->encode,
1060                                        number * sizeof(*srw_res->records));
1061
1062                         srw_res->extra_records = (Z_SRW_extra_record **)
1063                             odr_malloc(assoc->encode,
1064                                        number*sizeof(*srw_res->extra_records));
1065
1066                         for (i = 0; i<number; i++)
1067                         {
1068                             int errcode;
1069                             const char *addinfo = 0;
1070
1071                             srw_res->records[j].recordPacking = packing;
1072                             srw_res->records[j].recordData_buf = 0;
1073                             srw_res->extra_records[j] = 0;
1074                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1075                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1076                                                      srw_res->records + j,
1077                                                      &addinfo);
1078                             if (errcode)
1079                             {
1080                                 yaz_add_srw_diagnostic(assoc->encode,
1081                                                        &srw_res->diagnostics,
1082                                                        &srw_res->num_diagnostics,
1083                                                        yaz_diag_bib1_to_srw(errcode),
1084                                                        addinfo);
1085
1086                                 break;
1087                             }
1088                             if (srw_res->records[j].recordData_buf)
1089                                 j++;
1090                         }
1091                         srw_res->num_records = j;
1092                         if (!j)
1093                             srw_res->records = 0;
1094                     }
1095                 }
1096                 if (rr.estimated_hit_count || rr.partial_resultset)
1097                 {
1098                     yaz_add_srw_diagnostic(
1099                         assoc->encode,
1100                         &srw_res->diagnostics,
1101                         &srw_res->num_diagnostics,
1102                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1103                         0);
1104                 }
1105             }
1106         }
1107     }
1108     if (log_request)
1109     {
1110         const char *querystr = "?";
1111         const char *querytype = "?";
1112         WRBUF wr = wrbuf_alloc();
1113
1114         switch (srw_req->query_type)
1115         {
1116         case Z_SRW_query_type_cql:
1117             querytype = "CQL";
1118             querystr = srw_req->query.cql;
1119             break;
1120         case Z_SRW_query_type_pqf:
1121             querytype = "PQF";
1122             querystr = srw_req->query.pqf;
1123             break;
1124         }
1125         wrbuf_printf(wr, "SRWSearch ");
1126         wrbuf_printf(wr, srw_req->database);
1127         wrbuf_printf(wr, " ");
1128         if (srw_res->num_diagnostics)
1129             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1130         else if (*http_code != 200)
1131             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1132         else if (srw_res->numberOfRecords)
1133         {
1134             wrbuf_printf(wr, "OK %d",
1135                          (srw_res->numberOfRecords ?
1136                           *srw_res->numberOfRecords : 0));
1137         }
1138         wrbuf_printf(wr, " %s %d+%d",
1139                      (srw_res->resultSetId ?
1140                       srw_res->resultSetId : "-"),
1141                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1142                      srw_res->num_records);
1143         yaz_log(log_request, "%s %s: %s", wrbuf_cstr(wr), querytype, querystr);
1144         wrbuf_destroy(wr);
1145     }
1146 }
1147
1148 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1149 {
1150 #if YAZ_HAVE_XML2
1151     xmlNodePtr ptr = (xmlNode *) rr->server_node_ptr;
1152     if (!ptr)
1153         return 0;
1154     for (ptr = ptr->children; ptr; ptr = ptr->next)
1155     {
1156         if (ptr->type != XML_ELEMENT_NODE)
1157             continue;
1158         if (!strcmp((const char *) ptr->name, "explain"))
1159         {
1160             int len;
1161             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1162             xmlChar *buf_out;
1163             char *content;
1164
1165             ptr = xmlCopyNode(ptr, 1);
1166
1167             xmlDocSetRootElement(doc, ptr);
1168
1169             xmlDocDumpMemory(doc, &buf_out, &len);
1170             content = (char*) odr_malloc(rr->stream, 1+len);
1171             memcpy(content, buf_out, len);
1172             content[len] = '\0';
1173
1174             xmlFree(buf_out);
1175             xmlFreeDoc(doc);
1176             rr->explain_buf = content;
1177             return 0;
1178         }
1179     }
1180 #endif
1181     return 0;
1182 }
1183
1184 static void srw_bend_explain(association *assoc, request *req,
1185                              Z_SRW_PDU *sr,
1186                              Z_SRW_explainResponse *srw_res,
1187                              int *http_code)
1188 {
1189     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1190     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1191     *http_code = 404;
1192     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1193     if (assoc->init)
1194     {
1195         bend_explain_rr rr;
1196
1197         rr.stream = assoc->encode;
1198         rr.decode = assoc->decode;
1199         rr.print = assoc->print;
1200         rr.explain_buf = 0;
1201         rr.database = srw_req->database;
1202         if (assoc->server)
1203             rr.server_node_ptr = assoc->server->server_node_ptr;
1204         else
1205             rr.server_node_ptr = 0;
1206         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1207         if (assoc->init->bend_explain)
1208             (*assoc->init->bend_explain)(assoc->backend, &rr);
1209         else
1210             srw_bend_explain_default(assoc->backend, &rr);
1211
1212         if (rr.explain_buf)
1213         {
1214             int packing = Z_SRW_recordPacking_string;
1215             if (srw_req->recordPacking)
1216             {
1217                 packing =
1218                     yaz_srw_str_to_pack(srw_req->recordPacking);
1219                 if (packing == -1)
1220                     packing = Z_SRW_recordPacking_string;
1221             }
1222             srw_res->record.recordSchema = rr.schema;
1223             srw_res->record.recordPacking = packing;
1224             srw_res->record.recordData_buf = rr.explain_buf;
1225             srw_res->record.recordData_len = strlen(rr.explain_buf);
1226             srw_res->record.recordPosition = 0;
1227             *http_code = 200;
1228         }
1229     }
1230 }
1231
1232 static void srw_bend_scan(association *assoc, request *req,
1233                           Z_SRW_PDU *sr,
1234                           Z_SRW_scanResponse *srw_res,
1235                           int *http_code)
1236 {
1237     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1238     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1239
1240     *http_code = 200;
1241     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1242     if (srw_res->num_diagnostics == 0 && assoc->init)
1243     {
1244         struct scan_entry *save_entries;
1245
1246         bend_scan_rr *bsrr = (bend_scan_rr *)
1247             odr_malloc(assoc->encode, sizeof(*bsrr));
1248         bsrr->num_bases = 1;
1249         bsrr->basenames = &srw_req->database;
1250
1251         bsrr->num_entries = srw_req->maximumTerms ?
1252             *srw_req->maximumTerms : 10;
1253         bsrr->term_position = srw_req->responsePosition ?
1254             *srw_req->responsePosition : 1;
1255
1256         bsrr->errcode = 0;
1257         bsrr->errstring = 0;
1258         bsrr->referenceId = 0;
1259         bsrr->stream = assoc->encode;
1260         bsrr->print = assoc->print;
1261         bsrr->step_size = odr_intdup(assoc->decode, 0);
1262         bsrr->entries = 0;
1263         bsrr->setname = 0;
1264
1265         if (bsrr->num_entries > 0)
1266         {
1267             int i;
1268             bsrr->entries = (struct scan_entry *)
1269                 odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1270                            bsrr->num_entries);
1271             for (i = 0; i<bsrr->num_entries; i++)
1272             {
1273                 bsrr->entries[i].term = 0;
1274                 bsrr->entries[i].occurrences = 0;
1275                 bsrr->entries[i].errcode = 0;
1276                 bsrr->entries[i].errstring = 0;
1277                 bsrr->entries[i].display_term = 0;
1278             }
1279         }
1280         save_entries = bsrr->entries;  /* save it so we can compare later */
1281
1282         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1283             assoc->init->bend_scan)
1284         {
1285             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1286
1287             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1288                                       &bsrr->attributeset,
1289                                       srw_req->scanClause.pqf);
1290             yaz_pqf_destroy(pqf_parser);
1291             bsrr->scanClause = 0;
1292             ((int (*)(void *, bend_scan_rr *))
1293              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1294         }
1295         else if (srw_req->query_type == Z_SRW_query_type_cql
1296                  && assoc->init->bend_scan && assoc->server
1297                  && assoc->server->cql_transform)
1298         {
1299             int srw_error;
1300             bsrr->scanClause = 0;
1301             bsrr->attributeset = 0;
1302             bsrr->term = (Z_AttributesPlusTerm *)
1303                 odr_malloc(assoc->decode, sizeof(*bsrr->term));
1304             srw_error = cql2pqf_scan(assoc->encode,
1305                                      srw_req->scanClause.cql,
1306                                      assoc->server->cql_transform,
1307                                      bsrr->term);
1308             if (srw_error)
1309                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1310                                        &srw_res->num_diagnostics,
1311                                        srw_error, 0);
1312             else
1313             {
1314                 ((int (*)(void *, bend_scan_rr *))
1315                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1316             }
1317         }
1318         else if (srw_req->query_type == Z_SRW_query_type_cql
1319                  && assoc->init->bend_srw_scan)
1320         {
1321             bsrr->term = 0;
1322             bsrr->attributeset = 0;
1323             bsrr->scanClause = srw_req->scanClause.cql;
1324             ((int (*)(void *, bend_scan_rr *))
1325              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1326         }
1327         else
1328         {
1329             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1330                                    &srw_res->num_diagnostics,
1331                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1332         }
1333         if (bsrr->errcode)
1334         {
1335             int srw_error;
1336             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1337             {
1338                 *http_code = 404;
1339                 return;
1340             }
1341             srw_error = yaz_diag_bib1_to_srw(bsrr->errcode);
1342
1343             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1344                                    &srw_res->num_diagnostics,
1345                                    srw_error, bsrr->errstring);
1346         }
1347         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1348         {
1349             int i;
1350             srw_res->terms = (Z_SRW_scanTerm*)
1351                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1352                            bsrr->num_entries);
1353
1354             srw_res->num_terms =  bsrr->num_entries;
1355             for (i = 0; i<bsrr->num_entries; i++)
1356             {
1357                 Z_SRW_scanTerm *t = srw_res->terms + i;
1358                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1359                 t->numberOfRecords =
1360                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1361                 t->displayTerm = 0;
1362                 if (save_entries == bsrr->entries &&
1363                     bsrr->entries[i].display_term)
1364                 {
1365                     /* the entries was _not_ set by the handler. So it's
1366                        safe to test for new member display_term. It is
1367                        NULL'ed by us.
1368                     */
1369                     t->displayTerm = odr_strdup(assoc->encode,
1370                                                 bsrr->entries[i].display_term);
1371                 }
1372                 t->whereInList = 0;
1373             }
1374         }
1375     }
1376     if (log_request)
1377     {
1378         WRBUF wr = wrbuf_alloc();
1379         const char *querytype = 0;
1380         const char *querystr = 0;
1381
1382         switch(srw_req->query_type)
1383         {
1384         case Z_SRW_query_type_pqf:
1385             querytype = "PQF";
1386             querystr = srw_req->scanClause.pqf;
1387             break;
1388         case Z_SRW_query_type_cql:
1389             querytype = "CQL";
1390             querystr = srw_req->scanClause.cql;
1391             break;
1392         default:
1393             querytype = "UNKNOWN";
1394             querystr = "";
1395         }
1396
1397         wrbuf_printf(wr, "SRWScan ");
1398         wrbuf_printf(wr, srw_req->database);
1399         wrbuf_printf(wr, " ");
1400
1401         if (srw_res->num_diagnostics)
1402             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1403         else if (srw_res->num_terms)
1404             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1405         else
1406             wrbuf_printf(wr, "OK - - ");
1407
1408         wrbuf_printf(wr, "%d+%d+0 ",
1409                      (srw_req->responsePosition ?
1410                       *srw_req->responsePosition : 1),
1411                      (srw_req->maximumTerms ?
1412                       *srw_req->maximumTerms : 1));
1413         /* there is no step size in SRU/W ??? */
1414         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1415         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1416         wrbuf_destroy(wr);
1417     }
1418
1419 }
1420
1421 static void srw_bend_update(association *assoc, request *req,
1422                             Z_SRW_PDU *sr,
1423                             Z_SRW_updateResponse *srw_res,
1424                             int *http_code)
1425 {
1426     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1427     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1428     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1429     *http_code = 404;
1430     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1431     if (assoc->init)
1432     {
1433         bend_update_rr rr;
1434         Z_SRW_extra_record *extra = srw_req->extra_record;
1435
1436         rr.stream = assoc->encode;
1437         rr.print = assoc->print;
1438         rr.num_bases = 1;
1439         rr.basenames = &srw_req->database;
1440         rr.operation = srw_req->operation;
1441         rr.operation_status = "failed";
1442         rr.record_id = 0;
1443         rr.record_versions = 0;
1444         rr.num_versions = 0;
1445         rr.record_packing = "string";
1446         rr.record_schema = 0;
1447         rr.record_data = 0;
1448         rr.extra_record_data = 0;
1449         rr.extra_request_data = 0;
1450         rr.extra_response_data = 0;
1451         rr.uri = 0;
1452         rr.message = 0;
1453         rr.details = 0;
1454
1455         *http_code = 200;
1456         if (rr.operation == 0)
1457         {
1458             yaz_add_sru_update_diagnostic(
1459                 assoc->encode, &srw_res->diagnostics,
1460                 &srw_res->num_diagnostics,
1461                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1462                 "action" );
1463             return;
1464         }
1465         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1466         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1467         if (!strcmp( rr.operation, "delete"))
1468         {
1469             if (srw_req->record && !srw_req->record->recordSchema)
1470             {
1471                 rr.record_schema = odr_strdup(
1472                     assoc->encode,
1473                     srw_req->record->recordSchema);
1474             }
1475             if (srw_req->record)
1476             {
1477                 rr.record_data = odr_strdupn(
1478                     assoc->encode,
1479                     srw_req->record->recordData_buf,
1480                     srw_req->record->recordData_len );
1481             }
1482             if (extra && extra->extraRecordData_len)
1483             {
1484                 rr.extra_record_data = odr_strdupn(
1485                     assoc->encode,
1486                     extra->extraRecordData_buf,
1487                     extra->extraRecordData_len );
1488             }
1489             if (srw_req->recordId)
1490                 rr.record_id = srw_req->recordId;
1491             else if (extra && extra->recordIdentifier)
1492                 rr.record_id = extra->recordIdentifier;
1493         }
1494         else if (!strcmp(rr.operation, "replace"))
1495         {
1496             if (srw_req->recordId)
1497                 rr.record_id = srw_req->recordId;
1498             else if (extra && extra->recordIdentifier)
1499                 rr.record_id = extra->recordIdentifier;
1500             else
1501             {
1502                 yaz_add_sru_update_diagnostic(
1503                     assoc->encode, &srw_res->diagnostics,
1504                     &srw_res->num_diagnostics,
1505                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1506                     "recordIdentifier");
1507             }
1508             if (!srw_req->record)
1509             {
1510                 yaz_add_sru_update_diagnostic(
1511                     assoc->encode, &srw_res->diagnostics,
1512                     &srw_res->num_diagnostics,
1513                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1514                     "record");
1515             }
1516             else
1517             {
1518                 if (srw_req->record->recordSchema)
1519                     rr.record_schema = odr_strdup(
1520                         assoc->encode, srw_req->record->recordSchema);
1521                 if (srw_req->record->recordData_len )
1522                 {
1523                     rr.record_data = odr_strdupn(assoc->encode,
1524                                                  srw_req->record->recordData_buf,
1525                                                  srw_req->record->recordData_len );
1526                 }
1527                 else
1528                 {
1529                     yaz_add_sru_update_diagnostic(
1530                         assoc->encode, &srw_res->diagnostics,
1531                         &srw_res->num_diagnostics,
1532                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1533                         "recordData" );
1534                 }
1535             }
1536             if (extra && extra->extraRecordData_len)
1537             {
1538                 rr.extra_record_data = odr_strdupn(
1539                     assoc->encode,
1540                     extra->extraRecordData_buf,
1541                     extra->extraRecordData_len );
1542             }
1543         }
1544         else if (!strcmp(rr.operation, "insert"))
1545         {
1546             if (srw_req->recordId)
1547                 rr.record_id = srw_req->recordId;
1548             else if (extra)
1549                 rr.record_id = extra->recordIdentifier;
1550
1551             if (srw_req->record)
1552             {
1553                 if (srw_req->record->recordSchema)
1554                     rr.record_schema = odr_strdup(
1555                         assoc->encode, srw_req->record->recordSchema);
1556
1557                 if (srw_req->record->recordData_len)
1558                     rr.record_data = odr_strdupn(
1559                         assoc->encode,
1560                         srw_req->record->recordData_buf,
1561                         srw_req->record->recordData_len );
1562             }
1563             if (extra && extra->extraRecordData_len)
1564             {
1565                 rr.extra_record_data = odr_strdupn(
1566                     assoc->encode,
1567                     extra->extraRecordData_buf,
1568                     extra->extraRecordData_len );
1569             }
1570         }
1571         else
1572             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1573                                           &srw_res->num_diagnostics,
1574                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1575                                           rr.operation );
1576
1577         if (srw_req->record)
1578         {
1579             const char *pack_str =
1580                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1581             if (pack_str)
1582                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1583         }
1584
1585         if (srw_req->num_recordVersions)
1586         {
1587             rr.record_versions = srw_req->recordVersions;
1588             rr.num_versions = srw_req->num_recordVersions;
1589         }
1590         if (srw_req->extraRequestData_len)
1591         {
1592             rr.extra_request_data = odr_strdupn(assoc->encode,
1593                                                 srw_req->extraRequestData_buf,
1594                                                 srw_req->extraRequestData_len );
1595         }
1596         if (srw_res->num_diagnostics == 0)
1597         {
1598             if ( assoc->init->bend_srw_update)
1599                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1600             else
1601                 yaz_add_sru_update_diagnostic(
1602                     assoc->encode, &srw_res->diagnostics,
1603                     &srw_res->num_diagnostics,
1604                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1605                     "No Update backend handler");
1606         }
1607
1608         if (rr.uri)
1609             yaz_add_srw_diagnostic_uri(assoc->encode,
1610                                        &srw_res->diagnostics,
1611                                        &srw_res->num_diagnostics,
1612                                        rr.uri,
1613                                        rr.message,
1614                                        rr.details);
1615         srw_res->recordId = rr.record_id;
1616         srw_res->operationStatus = rr.operation_status;
1617         srw_res->recordVersions = rr.record_versions;
1618         srw_res->num_recordVersions = rr.num_versions;
1619         if (srw_res->extraResponseData_len)
1620         {
1621             srw_res->extraResponseData_buf = rr.extra_response_data;
1622             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1623         }
1624         if (srw_res->num_diagnostics == 0 && rr.record_data)
1625         {
1626             srw_res->record = yaz_srw_get_record(assoc->encode);
1627             srw_res->record->recordSchema = rr.record_schema;
1628             if (rr.record_packing)
1629             {
1630                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1631
1632                 if (pack == -1)
1633                 {
1634                     pack = Z_SRW_recordPacking_string;
1635                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1636                             rr.record_packing);
1637                 }
1638                 srw_res->record->recordPacking = pack;
1639             }
1640             srw_res->record->recordData_buf = rr.record_data;
1641             srw_res->record->recordData_len = strlen(rr.record_data);
1642             if (rr.extra_record_data)
1643             {
1644                 Z_SRW_extra_record *ex =
1645                     yaz_srw_get_extra_record(assoc->encode);
1646                 srw_res->extra_record = ex;
1647                 ex->extraRecordData_buf = rr.extra_record_data;
1648                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1649             }
1650         }
1651     }
1652 }
1653
1654 /* check if path is OK (1); BAD (0) */
1655 static int check_path(const char *path)
1656 {
1657     if (*path != '/')
1658         return 0;
1659     if (strstr(path, ".."))
1660         return 0;
1661     return 1;
1662 }
1663
1664 static char *read_file(const char *fname, ODR o, int *sz)
1665 {
1666     char *buf;
1667     FILE *inf = fopen(fname, "rb");
1668     if (!inf)
1669         return 0;
1670
1671     fseek(inf, 0L, SEEK_END);
1672     *sz = ftell(inf);
1673     rewind(inf);
1674     buf = (char *) odr_malloc(o, *sz);
1675     fread(buf, 1, *sz, inf);
1676     fclose(inf);
1677     return buf;
1678 }
1679
1680 static void process_http_request(association *assoc, request *req)
1681 {
1682     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1683     ODR o = assoc->encode;
1684     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1685     Z_SRW_PDU *sr = 0;
1686     Z_SOAP *soap_package = 0;
1687     Z_GDU *p = 0;
1688     char *charset = 0;
1689     Z_HTTP_Response *hres = 0;
1690     int keepalive = 1;
1691     const char *stylesheet = 0; /* for now .. set later */
1692     Z_SRW_diagnostic *diagnostic = 0;
1693     int num_diagnostic = 0;
1694     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1695
1696     if (!control_association(assoc, host, 0))
1697     {
1698         p = z_get_HTTP_Response(o, 404);
1699         r = 1;
1700     }
1701     if (r == 2 && assoc->server && assoc->server->docpath
1702         && hreq->path[0] == '/'
1703         &&
1704         /* check if path is a proper prefix of documentroot */
1705         strncmp(hreq->path+1, assoc->server->docpath,
1706                 strlen(assoc->server->docpath))
1707         == 0)
1708     {
1709         if (!check_path(hreq->path))
1710         {
1711             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1712             p = z_get_HTTP_Response(o, 404);
1713         }
1714         else
1715         {
1716             int content_size = 0;
1717             char *content_buf = read_file(hreq->path+1, o, &content_size);
1718             if (!content_buf)
1719             {
1720                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1721                 p = z_get_HTTP_Response(o, 404);
1722             }
1723             else
1724             {
1725                 const char *ctype = 0;
1726                 yaz_mime_types types = yaz_mime_types_create();
1727
1728                 yaz_mime_types_add(types, "xsl", "application/xml");
1729                 yaz_mime_types_add(types, "xml", "application/xml");
1730                 yaz_mime_types_add(types, "css", "text/css");
1731                 yaz_mime_types_add(types, "html", "text/html");
1732                 yaz_mime_types_add(types, "htm", "text/html");
1733                 yaz_mime_types_add(types, "txt", "text/plain");
1734                 yaz_mime_types_add(types, "js", "application/x-javascript");
1735
1736                 yaz_mime_types_add(types, "gif", "image/gif");
1737                 yaz_mime_types_add(types, "png", "image/png");
1738                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1739                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1740
1741                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1742                 if (!ctype)
1743                 {
1744                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1745                     p = z_get_HTTP_Response(o, 404);
1746                 }
1747                 else
1748                 {
1749                     p = z_get_HTTP_Response(o, 200);
1750                     hres = p->u.HTTP_Response;
1751                     hres->content_buf = content_buf;
1752                     hres->content_len = content_size;
1753                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1754                 }
1755                 yaz_mime_types_destroy(types);
1756             }
1757         }
1758         r = 1;
1759     }
1760
1761     if (r == 2)
1762     {
1763         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1764         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1765     }
1766     if (r == 2)  /* not taken */
1767     {
1768         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1769                            &diagnostic, &num_diagnostic);
1770         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1771     }
1772     if (r == 0)  /* decode SRW/SRU OK .. */
1773     {
1774         int http_code = 200;
1775         if (sr->which == Z_SRW_searchRetrieve_request)
1776         {
1777             Z_SRW_PDU *res =
1778                 yaz_srw_get_pdu(assoc->encode, Z_SRW_searchRetrieve_response,
1779                                 sr->srw_version);
1780             stylesheet = sr->u.request->stylesheet;
1781             if (num_diagnostic)
1782             {
1783                 res->u.response->diagnostics = diagnostic;
1784                 res->u.response->num_diagnostics = num_diagnostic;
1785             }
1786             else
1787             {
1788                 srw_bend_search(assoc, req, sr, res->u.response,
1789                                 &http_code);
1790             }
1791             if (http_code == 200)
1792                 soap_package->u.generic->p = res;
1793         }
1794         else if (sr->which == Z_SRW_explain_request)
1795         {
1796             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_explain_response,
1797                                              sr->srw_version);
1798             stylesheet = sr->u.explain_request->stylesheet;
1799             if (num_diagnostic)
1800             {
1801                 res->u.explain_response->diagnostics = diagnostic;
1802                 res->u.explain_response->num_diagnostics = num_diagnostic;
1803             }
1804             srw_bend_explain(assoc, req, sr,
1805                              res->u.explain_response, &http_code);
1806             if (http_code == 200)
1807                 soap_package->u.generic->p = res;
1808         }
1809         else if (sr->which == Z_SRW_scan_request)
1810         {
1811             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_scan_response,
1812                                              sr->srw_version);
1813             stylesheet = sr->u.scan_request->stylesheet;
1814             if (num_diagnostic)
1815             {
1816                 res->u.scan_response->diagnostics = diagnostic;
1817                 res->u.scan_response->num_diagnostics = num_diagnostic;
1818             }
1819             srw_bend_scan(assoc, req, sr,
1820                           res->u.scan_response, &http_code);
1821             if (http_code == 200)
1822                 soap_package->u.generic->p = res;
1823         }
1824         else if (sr->which == Z_SRW_update_request)
1825         {
1826             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_update_response,
1827                                              sr->srw_version);
1828             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1829             if (num_diagnostic)
1830             {
1831                 res->u.update_response->diagnostics = diagnostic;
1832                 res->u.update_response->num_diagnostics = num_diagnostic;
1833             }
1834             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1835             srw_bend_update(assoc, req, sr,
1836                             res->u.update_response, &http_code);
1837             if (http_code == 200)
1838                 soap_package->u.generic->p = res;
1839         }
1840         else
1841         {
1842             yaz_log(log_request, "SOAP ERROR");
1843             /* FIXME - what error, what query */
1844             http_code = 500;
1845             z_soap_error(assoc->encode, soap_package,
1846                          "SOAP-ENV:Client", "Bad method", 0);
1847         }
1848         if (http_code == 200 || http_code == 500)
1849         {
1850             static Z_SOAP_Handler soap_handlers[4] = {
1851 #if YAZ_HAVE_XML2
1852                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1853                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1854                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1855 #endif
1856                 {0, 0, 0}
1857             };
1858             char ctype[80];
1859             int ret;
1860             p = z_get_HTTP_Response(o, 200);
1861             hres = p->u.HTTP_Response;
1862
1863             if (!stylesheet && assoc->server)
1864                 stylesheet = assoc->server->stylesheet;
1865
1866             /* empty stylesheet means NO stylesheet */
1867             if (stylesheet && *stylesheet == '\0')
1868                 stylesheet = 0;
1869
1870             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1871                                        &hres->content_buf, &hres->content_len,
1872                                        soap_handlers, charset, stylesheet);
1873             hres->code = http_code;
1874
1875             strcpy(ctype, "text/xml");
1876             if (charset && strlen(charset) < sizeof(ctype)-30)
1877             {
1878                 strcat(ctype, "; charset=");
1879                 strcat(ctype, charset);
1880             }
1881             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1882         }
1883         else
1884             p = z_get_HTTP_Response(o, http_code);
1885     }
1886
1887     if (p == 0)
1888         p = z_get_HTTP_Response(o, 500);
1889     hres = p->u.HTTP_Response;
1890     if (!strcmp(hreq->version, "1.0"))
1891     {
1892         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1893         if (v && !strcmp(v, "Keep-Alive"))
1894             keepalive = 1;
1895         else
1896             keepalive = 0;
1897         hres->version = "1.0";
1898     }
1899     else
1900     {
1901         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1902         if (v && !strcmp(v, "close"))
1903             keepalive = 0;
1904         else
1905             keepalive = 1;
1906         hres->version = "1.1";
1907     }
1908     if (!keepalive)
1909     {
1910         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1911         assoc->state = ASSOC_DEAD;
1912         assoc->cs_get_mask = 0;
1913     }
1914     else
1915     {
1916         int t;
1917         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1918
1919         if (alive && isdigit(*(const unsigned char *) alive))
1920             t = atoi(alive);
1921         else
1922             t = 15;
1923         if (t < 0 || t > 3600)
1924             t = 3600;
1925         iochan_settimeout(assoc->client_chan,t);
1926         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1927     }
1928     process_gdu_response(assoc, req, p);
1929 }
1930
1931 static void process_gdu_request(association *assoc, request *req)
1932 {
1933     if (req->gdu_request->which == Z_GDU_Z3950)
1934     {
1935         char *msg = 0;
1936         req->apdu_request = req->gdu_request->u.z3950;
1937         if (process_z_request(assoc, req, &msg) < 0)
1938             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1939     }
1940     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1941         process_http_request(assoc, req);
1942     else
1943     {
1944         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1945     }
1946 }
1947
1948 /*
1949  * Initiate request processing.
1950  */
1951 static int process_z_request(association *assoc, request *req, char **msg)
1952 {
1953     int fd = -1;
1954     Z_APDU *res;
1955     int retval;
1956
1957     *msg = "Unknown Error";
1958     assert(req && req->state == REQUEST_IDLE);
1959     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1960     {
1961         *msg = "Missing InitRequest";
1962         return -1;
1963     }
1964     switch (req->apdu_request->which)
1965     {
1966     case Z_APDU_initRequest:
1967         res = process_initRequest(assoc, req); break;
1968     case Z_APDU_searchRequest:
1969         res = process_searchRequest(assoc, req, &fd); break;
1970     case Z_APDU_presentRequest:
1971         res = process_presentRequest(assoc, req, &fd); break;
1972     case Z_APDU_scanRequest:
1973         if (assoc->init->bend_scan)
1974             res = process_scanRequest(assoc, req, &fd);
1975         else
1976         {
1977             *msg = "Cannot handle Scan APDU";
1978             return -1;
1979         }
1980         break;
1981     case Z_APDU_extendedServicesRequest:
1982         if (assoc->init->bend_esrequest)
1983             res = process_ESRequest(assoc, req, &fd);
1984         else
1985         {
1986             *msg = "Cannot handle Extended Services APDU";
1987             return -1;
1988         }
1989         break;
1990     case Z_APDU_sortRequest:
1991         if (assoc->init->bend_sort)
1992             res = process_sortRequest(assoc, req, &fd);
1993         else
1994         {
1995             *msg = "Cannot handle Sort APDU";
1996             return -1;
1997         }
1998         break;
1999     case Z_APDU_close:
2000         process_close(assoc, req);
2001         return 0;
2002     case Z_APDU_deleteResultSetRequest:
2003         if (assoc->init->bend_delete)
2004             res = process_deleteRequest(assoc, req, &fd);
2005         else
2006         {
2007             *msg = "Cannot handle Delete APDU";
2008             return -1;
2009         }
2010         break;
2011     case Z_APDU_segmentRequest:
2012         if (assoc->init->bend_segment)
2013         {
2014             res = process_segmentRequest(assoc, req);
2015         }
2016         else
2017         {
2018             *msg = "Cannot handle Segment APDU";
2019             return -1;
2020         }
2021         break;
2022     case Z_APDU_triggerResourceControlRequest:
2023         return 0;
2024     default:
2025         *msg = "Bad APDU received";
2026         return -1;
2027     }
2028     if (res)
2029     {
2030         yaz_log(YLOG_DEBUG, "  result immediately available");
2031         retval = process_z_response(assoc, req, res);
2032     }
2033     else if (fd < 0)
2034     {
2035         yaz_log(YLOG_DEBUG, "  result unavailble");
2036         retval = 0;
2037     }
2038     else /* no result yet - one will be provided later */
2039     {
2040         IOCHAN chan;
2041
2042         /* Set up an I/O handler for the fd supplied by the backend */
2043
2044         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2045         req->state = REQUEST_PENDING;
2046         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2047             abort();
2048         iochan_setdata(chan, assoc);
2049         retval = 0;
2050     }
2051     return retval;
2052 }
2053
2054 /*
2055  * Handle message from the backend.
2056  */
2057 void backend_response(IOCHAN i, int event)
2058 {
2059     association *assoc = (association *)iochan_getdata(i);
2060     request *req = request_head(&assoc->incoming);
2061     Z_APDU *res;
2062     int fd;
2063
2064     yaz_log(YLOG_DEBUG, "backend_response");
2065     assert(assoc && req && req->state != REQUEST_IDLE);
2066     /* determine what it is we're waiting for */
2067     switch (req->apdu_request->which)
2068     {
2069         case Z_APDU_searchRequest:
2070             res = response_searchRequest(assoc, req, 0, &fd); break;
2071 #if 0
2072         case Z_APDU_presentRequest:
2073             res = response_presentRequest(assoc, req, 0, &fd); break;
2074         case Z_APDU_scanRequest:
2075             res = response_scanRequest(assoc, req, 0, &fd); break;
2076 #endif
2077         default:
2078             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2079             abort();
2080     }
2081     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2082     {
2083         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2084         do_close(assoc, Z_Close_systemProblem, 0);
2085         iochan_destroy(i);
2086         return;
2087     }
2088     else if (!res) /* no result yet - try again later */
2089     {
2090         yaz_log(YLOG_DEBUG, "   no result yet");
2091         iochan_setfd(i, fd); /* in case fd has changed */
2092     }
2093 }
2094
2095 /*
2096  * Encode response, and transfer the request structure to the outgoing queue.
2097  */
2098 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2099 {
2100     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2101
2102     if (assoc->print)
2103     {
2104         if (!z_GDU(assoc->print, &res, 0, 0))
2105             yaz_log(YLOG_WARN, "ODR print error: %s",
2106                 odr_errmsg(odr_geterror(assoc->print)));
2107         odr_reset(assoc->print);
2108     }
2109     if (!z_GDU(assoc->encode, &res, 0, 0))
2110     {
2111         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2112                 odr_errmsg(odr_geterror(assoc->decode)),
2113                 odr_getelement(assoc->decode));
2114         return -1;
2115     }
2116     req->response = odr_getbuf(assoc->encode, &req->len_response,
2117         &req->size_response);
2118     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2119     odr_reset(assoc->encode);
2120     req->state = REQUEST_IDLE;
2121     request_enq(&assoc->outgoing, req);
2122     /* turn the work over to the ir_session handler */
2123     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2124     assoc->cs_put_mask = EVENT_OUTPUT;
2125     /* Is there more work to be done? give that to the input handler too */
2126     for (;;)
2127     {
2128         req = request_head(&assoc->incoming);
2129         if (req && req->state == REQUEST_IDLE)
2130         {
2131             request_deq(&assoc->incoming);
2132             process_gdu_request(assoc, req);
2133         }
2134         else
2135             break;
2136     }
2137     return 0;
2138 }
2139
2140 /*
2141  * Encode response, and transfer the request structure to the outgoing queue.
2142  */
2143 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2144 {
2145     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2146     gres->which = Z_GDU_Z3950;
2147     gres->u.z3950 = res;
2148
2149     return process_gdu_response(assoc, req, gres);
2150 }
2151
2152 static char *get_vhost(Z_OtherInformation *otherInfo)
2153 {
2154     return yaz_oi_get_string_oid(&otherInfo, yaz_oid_userinfo_proxy, 1, 0);
2155 }
2156
2157 /*
2158  * Handle init request.
2159  * At the moment, we don't check the options
2160  * anywhere else in the code - we just try not to do anything that would
2161  * break a naive client. We'll toss 'em into the association block when
2162  * we need them there.
2163  */
2164 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2165 {
2166     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2167     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2168     Z_InitResponse *resp = apdu->u.initResponse;
2169     bend_initresult *binitres;
2170     char *version;
2171     char options[140];
2172     statserv_options_block *cb = 0;  /* by default no control for backend */
2173
2174     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2175         cb = statserv_getcontrol();  /* got control block for backend */
2176
2177     if (cb && assoc->backend)
2178         (*cb->bend_close)(assoc->backend);
2179
2180     yaz_log(log_requestdetail, "Got initRequest");
2181     if (req->implementationId)
2182         yaz_log(log_requestdetail, "Id:        %s",
2183                 req->implementationId);
2184     if (req->implementationName)
2185         yaz_log(log_requestdetail, "Name:      %s",
2186                 req->implementationName);
2187     if (req->implementationVersion)
2188         yaz_log(log_requestdetail, "Version:   %s",
2189                 req->implementationVersion);
2190
2191     assoc_init_reset(assoc);
2192
2193     assoc->init->auth = req->idAuthentication;
2194     assoc->init->referenceId = req->referenceId;
2195
2196     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2197     {
2198         Z_CharSetandLanguageNegotiation *negotiation =
2199             yaz_get_charneg_record (req->otherInfo);
2200         if (negotiation &&
2201             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2202             assoc->init->charneg_request = negotiation;
2203     }
2204
2205     assoc->backend = 0;
2206     if (cb)
2207     {
2208         if (req->implementationVersion)
2209             yaz_log(log_requestdetail, "Config:    %s",
2210                     cb->configname);
2211
2212         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2213
2214         /* we have a backend control block, so call that init function */
2215         if (!(binitres = (*cb->bend_init)(assoc->init)))
2216         {
2217             yaz_log(YLOG_WARN, "Bad response from backend.");
2218             return 0;
2219         }
2220         assoc->backend = binitres->handle;
2221     }
2222     else
2223     {
2224         /* no backend. return error */
2225         binitres = (bend_initresult *)
2226             odr_malloc(assoc->encode, sizeof(*binitres));
2227         binitres->errstring = 0;
2228         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2229         iochan_settimeout(assoc->client_chan, 10);
2230     }
2231     if ((assoc->init->bend_sort))
2232         yaz_log(YLOG_DEBUG, "Sort handler installed");
2233     if ((assoc->init->bend_search))
2234         yaz_log(YLOG_DEBUG, "Search handler installed");
2235     if ((assoc->init->bend_present))
2236         yaz_log(YLOG_DEBUG, "Present handler installed");
2237     if ((assoc->init->bend_esrequest))
2238         yaz_log(YLOG_DEBUG, "ESRequest handler installed");
2239     if ((assoc->init->bend_delete))
2240         yaz_log(YLOG_DEBUG, "Delete handler installed");
2241     if ((assoc->init->bend_scan))
2242         yaz_log(YLOG_DEBUG, "Scan handler installed");
2243     if ((assoc->init->bend_segment))
2244         yaz_log(YLOG_DEBUG, "Segment handler installed");
2245
2246     resp->referenceId = req->referenceId;
2247     *options = '\0';
2248     /* let's tell the client what we can do */
2249     if (ODR_MASK_GET(req->options, Z_Options_search))
2250     {
2251         ODR_MASK_SET(resp->options, Z_Options_search);
2252         strcat(options, "srch");
2253     }
2254     if (ODR_MASK_GET(req->options, Z_Options_present))
2255     {
2256         ODR_MASK_SET(resp->options, Z_Options_present);
2257         strcat(options, " prst");
2258     }
2259     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2260         assoc->init->bend_delete)
2261     {
2262         ODR_MASK_SET(resp->options, Z_Options_delSet);
2263         strcat(options, " del");
2264     }
2265     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2266         assoc->init->bend_esrequest)
2267     {
2268         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2269         strcat(options, " extendedServices");
2270     }
2271     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2272     {
2273         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2274         strcat(options, " namedresults");
2275     }
2276     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2277     {
2278         ODR_MASK_SET(resp->options, Z_Options_scan);
2279         strcat(options, " scan");
2280     }
2281     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2282     {
2283         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2284         strcat(options, " concurrop");
2285     }
2286     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2287     {
2288         ODR_MASK_SET(resp->options, Z_Options_sort);
2289         strcat(options, " sort");
2290     }
2291
2292     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2293     {
2294         Z_OtherInformationUnit *p0;
2295
2296         if (!assoc->init->charneg_response)
2297         {
2298             if (assoc->init->query_charset)
2299             {
2300                 assoc->init->charneg_response = yaz_set_response_charneg(
2301                     assoc->encode, assoc->init->query_charset, 0,
2302                     assoc->init->records_in_same_charset);
2303             }
2304             else
2305             {
2306                 yaz_log(YLOG_WARN, "default query_charset not defined by backend");
2307             }
2308         }
2309         if (assoc->init->charneg_response
2310             && (p0=yaz_oi_update(&resp->otherInfo, assoc->encode, NULL, 0, 0)))
2311         {
2312             p0->which = Z_OtherInfo_externallyDefinedInfo;
2313             p0->information.externallyDefinedInfo =
2314                 assoc->init->charneg_response;
2315             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2316             strcat(options, " negotiation");
2317         }
2318     }
2319     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2320         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2321
2322     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2323     {
2324         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2325         assoc->version = 1; /* 1 & 2 are equivalent */
2326     }
2327     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2328     {
2329         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2330         assoc->version = 2;
2331     }
2332     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2333     {
2334         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2335         assoc->version = 3;
2336     }
2337
2338     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2339
2340     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2341         assoc->maximumRecordSize = *req->maximumRecordSize;
2342
2343     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2344         assoc->preferredMessageSize = *req->preferredMessageSize;
2345
2346     resp->preferredMessageSize = &assoc->preferredMessageSize;
2347     resp->maximumRecordSize = &assoc->maximumRecordSize;
2348
2349     resp->implementationId = odr_prepend(assoc->encode,
2350                 assoc->init->implementation_id,
2351                 resp->implementationId);
2352
2353     resp->implementationName = odr_prepend(assoc->encode,
2354                 assoc->init->implementation_name,
2355                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2356
2357     version = odr_strdup(assoc->encode, "$Revision: 1.128 $");
2358     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2359         version[strlen(version)-2] = '\0';
2360     resp->implementationVersion = odr_prepend(assoc->encode,
2361                 assoc->init->implementation_version,
2362                 odr_prepend(assoc->encode, &version[11],
2363                             resp->implementationVersion));
2364
2365     if (binitres->errcode)
2366     {
2367         assoc->state = ASSOC_DEAD;
2368         resp->userInformationField =
2369             init_diagnostics(assoc->encode, binitres->errcode,
2370                              binitres->errstring);
2371         *resp->result = 0;
2372     }
2373     if (log_request)
2374     {
2375         if (!req->idAuthentication)
2376             yaz_log(log_request, "Auth none");
2377         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2378         {
2379             const char *open = req->idAuthentication->u.open;
2380             const char *slash = strchr(open, '/');
2381             int len;
2382             if (slash)
2383                 len = slash - open;
2384             else
2385                 len = strlen(open);
2386                 yaz_log(log_request, "Auth open %.*s", len, open);
2387         }
2388         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2389         {
2390             const char *user = req->idAuthentication->u.idPass->userId;
2391             const char *group = req->idAuthentication->u.idPass->groupId;
2392             yaz_log(log_request, "Auth idPass %s %s",
2393                     user ? user : "-", group ? group : "-");
2394         }
2395         else if (req->idAuthentication->which
2396                  == Z_IdAuthentication_anonymous)
2397         {
2398             yaz_log(log_request, "Auth anonymous");
2399         }
2400         else
2401         {
2402             yaz_log(log_request, "Auth other");
2403         }
2404     }
2405     if (log_request)
2406     {
2407         WRBUF wr = wrbuf_alloc();
2408         wrbuf_printf(wr, "Init ");
2409         if (binitres->errcode)
2410             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2411         else
2412             wrbuf_printf(wr, "OK -");
2413         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2414                      (req->implementationId ? req->implementationId :"-"),
2415                      (req->implementationName ?
2416                       req->implementationName : "-"),
2417                      (req->implementationVersion ?
2418                       req->implementationVersion : "-")
2419             );
2420         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2421         wrbuf_destroy(wr);
2422     }
2423     return apdu;
2424 }
2425
2426 /*
2427  * Set the specified `errcode' and `errstring' into a UserInfo-1
2428  * external to be returned to the client in accordance with Z35.90
2429  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2430  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2431  */
2432 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2433 {
2434     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2435         addinfo ? " -- " : "", addinfo ? addinfo : "");
2436     return zget_init_diagnostics(odr, error, addinfo);
2437 }
2438
2439 /*
2440  * nonsurrogate diagnostic record.
2441  */
2442 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2443 {
2444     Z_Records *rec = (Z_Records *) odr_malloc(assoc->encode, sizeof(*rec));
2445
2446     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2447             addinfo ? " -- " : "", addinfo ? addinfo : "");
2448
2449     rec->which = Z_Records_NSD;
2450     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2451                                                            error, addinfo);
2452     return rec;
2453 }
2454
2455 /*
2456  * surrogate diagnostic.
2457  */
2458 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2459                                           const char *dbname,
2460                                           int error, const char *addinfo)
2461 {
2462     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2463             addinfo ? " -- " : "", addinfo ? addinfo : "");
2464     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2465 }
2466
2467 static Z_Records *pack_records(association *a, char *setname, int start,
2468                                int *num, Z_RecordComposition *comp,
2469                                int *next, int *pres,
2470                                Z_ReferenceId *referenceId,
2471                                Odr_oid *oid, int *errcode)
2472 {
2473     int recno, total_length = 0, toget = *num, dumped_records = 0;
2474     Z_Records *records =
2475         (Z_Records *) odr_malloc(a->encode, sizeof(*records));
2476     Z_NamePlusRecordList *reclist =
2477         (Z_NamePlusRecordList *) odr_malloc(a->encode, sizeof(*reclist));
2478     Z_NamePlusRecord **list =
2479         (Z_NamePlusRecord **) odr_malloc(a->encode, sizeof(*list) * toget);
2480
2481     records->which = Z_Records_DBOSD;
2482     records->u.databaseOrSurDiagnostics = reclist;
2483     reclist->num_records = 0;
2484     reclist->records = list;
2485     *pres = Z_PresentStatus_success;
2486     *num = 0;
2487     *next = 0;
2488
2489     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2490     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2491         a->maximumRecordSize);
2492     for (recno = start; reclist->num_records < toget; recno++)
2493     {
2494         bend_fetch_rr freq;
2495         Z_NamePlusRecord *thisrec;
2496         int this_length = 0;
2497         /*
2498          * we get the number of bytes allocated on the stream before any
2499          * allocation done by the backend - this should give us a reasonable
2500          * idea of the total size of the data so far.
2501          */
2502         total_length = odr_total(a->encode) - dumped_records;
2503         freq.errcode = 0;
2504         freq.errstring = 0;
2505         freq.basename = 0;
2506         freq.len = 0;
2507         freq.record = 0;
2508         freq.last_in_set = 0;
2509         freq.setname = setname;
2510         freq.surrogate_flag = 0;
2511         freq.number = recno;
2512         freq.comp = comp;
2513         freq.request_format = oid;
2514         freq.output_format = 0;
2515         freq.stream = a->encode;
2516         freq.print = a->print;
2517         freq.referenceId = referenceId;
2518         freq.schema = 0;
2519
2520         retrieve_fetch(a, &freq);
2521
2522         *next = freq.last_in_set ? 0 : recno + 1;
2523
2524         if (freq.errcode)
2525         {
2526             if (!freq.surrogate_flag) /* non-surrogate diagnostic i.e. global */
2527             {
2528                 char s[20];
2529                 *pres = Z_PresentStatus_failure;
2530                 /* for 'present request out of range',
2531                    set addinfo to record position if not set */
2532                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2533                                 freq.errstring == 0)
2534                 {
2535                     sprintf (s, "%d", recno);
2536                     freq.errstring = s;
2537                 }
2538                 if (errcode)
2539                     *errcode = freq.errcode;
2540                 return diagrec(a, freq.errcode, freq.errstring);
2541             }
2542             reclist->records[reclist->num_records] =
2543                 surrogatediagrec(a, freq.basename, freq.errcode,
2544                                  freq.errstring);
2545             reclist->num_records++;
2546             continue;
2547         }
2548         if (freq.record == 0)  /* no error and no record ? */
2549         {
2550             *next = 0;   /* signal end-of-set and stop */
2551             break;
2552         }
2553         if (freq.len >= 0)
2554             this_length = freq.len;
2555         else
2556             this_length = odr_total(a->encode) - total_length - dumped_records;
2557         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2558             this_length, total_length, dumped_records);
2559         if (a->preferredMessageSize > 0 &&
2560                 this_length + total_length > a->preferredMessageSize)
2561         {
2562             /* record is small enough, really */
2563             if (this_length <= a->preferredMessageSize && recno > start)
2564             {
2565                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2566                 *pres = Z_PresentStatus_partial_2;
2567                 break;
2568             }
2569             /* record can only be fetched by itself */
2570             if (this_length < a->maximumRecordSize)
2571             {
2572                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2573                 if (toget > 1)
2574                 {
2575                     yaz_log(YLOG_DEBUG, "  Dropped it");
2576                     reclist->records[reclist->num_records] =
2577                          surrogatediagrec(a, freq.basename, 16, 0);
2578                     reclist->num_records++;
2579                     dumped_records += this_length;
2580                     continue;
2581                 }
2582             }
2583             else /* too big entirely */
2584             {
2585                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2586                         this_length, a->maximumRecordSize);
2587                 reclist->records[reclist->num_records] =
2588                     surrogatediagrec(a, freq.basename, 17, 0);
2589                 reclist->num_records++;
2590                 dumped_records += this_length;
2591                 continue;
2592             }
2593         }
2594
2595         if (!(thisrec = (Z_NamePlusRecord *)
2596               odr_malloc(a->encode, sizeof(*thisrec))))
2597             return 0;
2598         thisrec->databaseName = odr_strdup_null(a->encode, freq.basename);
2599         thisrec->which = Z_NamePlusRecord_databaseRecord;
2600
2601         if (!freq.output_format)
2602             freq.output_format = freq.request_format;
2603         thisrec->u.databaseRecord = z_ext_record_oid(
2604             a->encode, freq.output_format, freq.record, freq.len);
2605         if (!thisrec->u.databaseRecord)
2606             return 0;
2607         reclist->records[reclist->num_records] = thisrec;
2608         reclist->num_records++;
2609     }
2610     *num = reclist->num_records;
2611     return records;
2612 }
2613
2614 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2615     int *fd)
2616 {
2617     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2618     bend_search_rr *bsrr =
2619         (bend_search_rr *)nmem_malloc(reqb->request_mem, sizeof(*bsrr));
2620
2621     yaz_log(log_requestdetail, "Got SearchRequest.");
2622     bsrr->fd = fd;
2623     bsrr->request = reqb;
2624     bsrr->association = assoc;
2625     bsrr->referenceId = req->referenceId;
2626     save_referenceId (reqb, bsrr->referenceId);
2627     bsrr->srw_sortKeys = 0;
2628     bsrr->srw_setname = 0;
2629     bsrr->srw_setnameIdleTime = 0;
2630     bsrr->estimated_hit_count = 0;
2631     bsrr->partial_resultset = 0;
2632
2633     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2634     if (req->databaseNames)
2635     {
2636         int i;
2637         for (i = 0; i < req->num_databaseNames; i++)
2638             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2639     }
2640
2641     yaz_log_zquery_level(log_requestdetail,req->query);
2642
2643     if (assoc->init->bend_search)
2644     {
2645         bsrr->setname = req->resultSetName;
2646         bsrr->replace_set = *req->replaceIndicator;
2647         bsrr->num_bases = req->num_databaseNames;
2648         bsrr->basenames = req->databaseNames;
2649         bsrr->query = req->query;
2650         bsrr->stream = assoc->encode;
2651         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2652         bsrr->decode = assoc->decode;
2653         bsrr->print = assoc->print;
2654         bsrr->hits = 0;
2655         bsrr->errcode = 0;
2656         bsrr->errstring = NULL;
2657         bsrr->search_info = NULL;
2658
2659         if (assoc->server && assoc->server->cql_transform
2660             && req->query->which == Z_Query_type_104
2661             && req->query->u.type_104->which == Z_External_CQL)
2662         {
2663             /* have a CQL query and a CQL to PQF transform .. */
2664             int srw_errcode =
2665                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2666                         assoc->server->cql_transform, bsrr->query);
2667             if (srw_errcode)
2668                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2669         }
2670
2671         if (assoc->server && assoc->server->ccl_transform
2672             && req->query->which == Z_Query_type_2) /*CCL*/
2673         {
2674             /* have a CCL query and a CCL to PQF transform .. */
2675             int srw_errcode =
2676                 ccl2pqf(bsrr->stream, req->query->u.type_2,
2677                         assoc->server->ccl_transform, bsrr);
2678             if (srw_errcode)
2679                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2680         }
2681
2682         if (!bsrr->errcode)
2683             (assoc->init->bend_search)(assoc->backend, bsrr);
2684         if (!bsrr->request)  /* backend not ready with the search response */
2685             return 0;  /* should not be used any more */
2686     }
2687     else
2688     {
2689         /* FIXME - make a diagnostic for it */
2690         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2691     }
2692     return response_searchRequest(assoc, reqb, bsrr, fd);
2693 }
2694
2695 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2696
2697 /*
2698  * Prepare a searchresponse based on the backend results. We probably want
2699  * to look at making the fetching of records nonblocking as well, but
2700  * so far, we'll keep things simple.
2701  * If bsrt is null, that means we're called in response to a communications
2702  * event, and we'll have to get the response for ourselves.
2703  */
2704 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2705     bend_search_rr *bsrt, int *fd)
2706 {
2707     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2708     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2709     Z_SearchResponse *resp = (Z_SearchResponse *)
2710         odr_malloc(assoc->encode, sizeof(*resp));
2711     int *nulint = odr_intdup(assoc->encode, 0);
2712     int *next = odr_intdup(assoc->encode, 0);
2713     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2714     int returnedrecs = 0;
2715
2716     apdu->which = Z_APDU_searchResponse;
2717     apdu->u.searchResponse = resp;
2718     resp->referenceId = req->referenceId;
2719     resp->additionalSearchInfo = 0;
2720     resp->otherInfo = 0;
2721     *fd = -1;
2722     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2723     {
2724         yaz_log(YLOG_FATAL, "Bad result from backend");
2725         return 0;
2726     }
2727     else if (bsrt->errcode)
2728     {
2729         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2730         resp->resultCount = nulint;
2731         resp->numberOfRecordsReturned = nulint;
2732         resp->nextResultSetPosition = nulint;
2733         resp->searchStatus = nulint;
2734         resp->resultSetStatus = none;
2735         resp->presentStatus = 0;
2736     }
2737     else
2738     {
2739         bool_t *sr = odr_intdup(assoc->encode, 1);
2740         int *toget = odr_intdup(assoc->encode, 0);
2741         Z_RecordComposition comp, *compp = 0;
2742
2743         yaz_log(log_requestdetail, "resultCount: %d", bsrt->hits);
2744
2745         resp->records = 0;
2746         resp->resultCount = &bsrt->hits;
2747
2748         comp.which = Z_RecordComp_simple;
2749         /* how many records does the user agent want, then? */
2750         if (bsrt->hits <= *req->smallSetUpperBound)
2751         {
2752             *toget = bsrt->hits;
2753             if ((comp.u.simple = req->smallSetElementSetNames))
2754                 compp = &comp;
2755         }
2756         else if (bsrt->hits < *req->largeSetLowerBound)
2757         {
2758             *toget = *req->mediumSetPresentNumber;
2759             if (*toget > bsrt->hits)
2760                 *toget = bsrt->hits;
2761             if ((comp.u.simple = req->mediumSetElementSetNames))
2762                 compp = &comp;
2763         }
2764         else
2765             *toget = 0;
2766
2767         if (*toget && !resp->records)
2768         {
2769             int *presst = odr_intdup(assoc->encode, 0);
2770             /* Call bend_present if defined */
2771             if (assoc->init->bend_present)
2772             {
2773                 bend_present_rr *bprr = (bend_present_rr *)
2774                     nmem_malloc(reqb->request_mem, sizeof(*bprr));
2775                 bprr->setname = req->resultSetName;
2776                 bprr->start = 1;
2777                 bprr->number = *toget;
2778                 bprr->format = req->preferredRecordSyntax;
2779                 bprr->comp = compp;
2780                 bprr->referenceId = req->referenceId;
2781                 bprr->stream = assoc->encode;
2782                 bprr->print = assoc->print;
2783                 bprr->request = reqb;
2784                 bprr->association = assoc;
2785                 bprr->errcode = 0;
2786                 bprr->errstring = NULL;
2787                 (*assoc->init->bend_present)(assoc->backend, bprr);
2788
2789                 if (!bprr->request)
2790                     return 0;
2791                 if (bprr->errcode)
2792                 {
2793                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2794                     *resp->presentStatus = Z_PresentStatus_failure;
2795                 }
2796             }
2797
2798             if (!resp->records)
2799                 resp->records = pack_records(
2800                     assoc, req->resultSetName, 1,
2801                     toget, compp, next, presst, req->referenceId,
2802                     req->preferredRecordSyntax, NULL);
2803             if (!resp->records)
2804                 return 0;
2805             resp->numberOfRecordsReturned = toget;
2806             returnedrecs = *toget;
2807             resp->presentStatus = presst;
2808         }
2809         else
2810         {
2811             if (*resp->resultCount)
2812                 *next = 1;
2813             resp->numberOfRecordsReturned = nulint;
2814             resp->presentStatus = 0;
2815         }
2816         resp->nextResultSetPosition = next;
2817         resp->searchStatus = sr;
2818         resp->resultSetStatus = 0;
2819         if (bsrt->estimated_hit_count)
2820         {
2821             resp->resultSetStatus = odr_intdup(assoc->encode,
2822                                                Z_SearchResponse_estimate);
2823         }
2824         else if (bsrt->partial_resultset)
2825         {
2826             resp->resultSetStatus = odr_intdup(assoc->encode,
2827                                                Z_SearchResponse_subset);
2828         }
2829     }
2830     resp->additionalSearchInfo = bsrt->search_info;
2831
2832     if (log_request)
2833     {
2834         int i;
2835         WRBUF wr = wrbuf_alloc();
2836
2837         for (i = 0 ; i < req->num_databaseNames; i++){
2838             if (i)
2839                 wrbuf_printf(wr, "+");
2840             wrbuf_printf(wr, req->databaseNames[i]);
2841         }
2842         wrbuf_printf(wr, " ");
2843
2844         if (bsrt->errcode)
2845             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2846         else
2847             wrbuf_printf(wr, "OK %d", bsrt->hits);
2848         wrbuf_printf(wr, " %s 1+%d ",
2849                      req->resultSetName, returnedrecs);
2850         yaz_query_to_wrbuf(wr, req->query);
2851
2852         yaz_log(log_request, "Search %s", wrbuf_cstr(wr));
2853         wrbuf_destroy(wr);
2854     }
2855     return apdu;
2856 }
2857
2858 /*
2859  * Maybe we got a little over-friendly when we designed bend_fetch to
2860  * get only one record at a time. Some backends can optimise multiple-record
2861  * fetches, and at any rate, there is some overhead involved in
2862  * all that selecting and hopping around. Problem is, of course, that the
2863  * frontend can't know ahead of time how many records it'll need to
2864  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2865  * is downright lousy as a bulk data transfer protocol.
2866  *
2867  * To start with, we'll do the fetching of records from the backend
2868  * in one operation: To save some trips in and out of the event-handler,
2869  * and to simplify the interface to pack_records. At any rate, asynch
2870  * operation is more fun in operations that have an unpredictable execution
2871  * speed - which is normally more true for search than for present.
2872  */
2873 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2874                                       int *fd)
2875 {
2876     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2877     Z_APDU *apdu;
2878     Z_PresentResponse *resp;
2879     int *next;
2880     int *num;
2881     int errcode = 0;
2882     const char *errstring = 0;
2883
2884     yaz_log(log_requestdetail, "Got PresentRequest.");
2885
2886     resp = (Z_PresentResponse *)odr_malloc(assoc->encode, sizeof(*resp));
2887     resp->records = 0;
2888     resp->presentStatus = odr_intdup(assoc->encode, 0);
2889     if (assoc->init->bend_present)
2890     {
2891         bend_present_rr *bprr = (bend_present_rr *)
2892             nmem_malloc(reqb->request_mem, sizeof(*bprr));
2893         bprr->setname = req->resultSetId;
2894         bprr->start = *req->resultSetStartPoint;
2895         bprr->number = *req->numberOfRecordsRequested;
2896         bprr->format = req->preferredRecordSyntax;
2897         bprr->comp = req->recordComposition;
2898         bprr->referenceId = req->referenceId;
2899         bprr->stream = assoc->encode;
2900         bprr->print = assoc->print;
2901         bprr->request = reqb;
2902         bprr->association = assoc;
2903         bprr->errcode = 0;
2904         bprr->errstring = NULL;
2905         (*assoc->init->bend_present)(assoc->backend, bprr);
2906
2907         if (!bprr->request)
2908             return 0; /* should not happen */
2909         if (bprr->errcode)
2910         {
2911             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2912             *resp->presentStatus = Z_PresentStatus_failure;
2913             errcode = bprr->errcode;
2914             errstring = bprr->errstring;
2915         }
2916     }
2917     apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2918     next = odr_intdup(assoc->encode, 0);
2919     num = odr_intdup(assoc->encode, 0);
2920
2921     apdu->which = Z_APDU_presentResponse;
2922     apdu->u.presentResponse = resp;
2923     resp->referenceId = req->referenceId;
2924     resp->otherInfo = 0;
2925
2926     if (!resp->records)
2927     {
2928         *num = *req->numberOfRecordsRequested;
2929         resp->records =
2930             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2931                          num, req->recordComposition, next,
2932                          resp->presentStatus,
2933                          req->referenceId, req->preferredRecordSyntax,
2934                          &errcode);
2935     }
2936     if (log_request)
2937     {
2938         WRBUF wr = wrbuf_alloc();
2939         wrbuf_printf(wr, "Present ");
2940
2941         if (*resp->presentStatus == Z_PresentStatus_failure)
2942             wrbuf_printf(wr, "ERROR %d ", errcode);
2943         else if (*resp->presentStatus == Z_PresentStatus_success)
2944             wrbuf_printf(wr, "OK -  ");
2945         else
2946             wrbuf_printf(wr, "Partial %d - ", *resp->presentStatus);
2947
2948         wrbuf_printf(wr, " %s %d+%d ",
2949                 req->resultSetId, *req->resultSetStartPoint,
2950                 *req->numberOfRecordsRequested);
2951         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
2952         wrbuf_destroy(wr);
2953     }
2954     if (!resp->records)
2955         return 0;
2956     resp->numberOfRecordsReturned = num;
2957     resp->nextResultSetPosition = next;
2958
2959     return apdu;
2960 }
2961
2962 /*
2963  * Scan was implemented rather in a hurry, and with support for only the basic
2964  * elements of the service in the backend API. Suggestions are welcome.
2965  */
2966 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2967 {
2968     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2969     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2970     Z_ScanResponse *res = (Z_ScanResponse *)
2971         odr_malloc(assoc->encode, sizeof(*res));
2972     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2973     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2974     Z_ListEntries *ents = (Z_ListEntries *)
2975         odr_malloc(assoc->encode, sizeof(*ents));
2976     Z_DiagRecs *diagrecs_p = NULL;
2977     bend_scan_rr *bsrr = (bend_scan_rr *)
2978         odr_malloc(assoc->encode, sizeof(*bsrr));
2979     struct scan_entry *save_entries;
2980
2981     yaz_log(log_requestdetail, "Got ScanRequest");
2982
2983     apdu->which = Z_APDU_scanResponse;
2984     apdu->u.scanResponse = res;
2985     res->referenceId = req->referenceId;
2986
2987     /* if step is absent, set it to 0 */
2988     res->stepSize = odr_intdup(assoc->encode, 0);
2989     if (req->stepSize)
2990         *res->stepSize = *req->stepSize;
2991
2992     res->scanStatus = scanStatus;
2993     res->numberOfEntriesReturned = numberOfEntriesReturned;
2994     res->positionOfTerm = 0;
2995     res->entries = ents;
2996     ents->num_entries = 0;
2997     ents->entries = NULL;
2998     ents->num_nonsurrogateDiagnostics = 0;
2999     ents->nonsurrogateDiagnostics = NULL;
3000     res->attributeSet = 0;
3001     res->otherInfo = 0;
3002
3003     if (req->databaseNames)
3004     {
3005         int i;
3006         for (i = 0; i < req->num_databaseNames; i++)
3007             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
3008     }
3009     bsrr->scanClause = 0;
3010     bsrr->errcode = 0;
3011     bsrr->errstring = 0;
3012     bsrr->num_bases = req->num_databaseNames;
3013     bsrr->basenames = req->databaseNames;
3014     bsrr->num_entries = *req->numberOfTermsRequested;
3015     bsrr->term = req->termListAndStartPoint;
3016     bsrr->referenceId = req->referenceId;
3017     bsrr->stream = assoc->encode;
3018     bsrr->print = assoc->print;
3019     bsrr->step_size = res->stepSize;
3020     bsrr->setname = yaz_oi_get_string_oid(&req->otherInfo,
3021                                           yaz_oid_userinfo_scan_set, 1, 0);
3022     bsrr->entries = 0;
3023     /* For YAZ 2.0 and earlier it was the backend handler that
3024        initialized entries (member display_term did not exist)
3025        YAZ 2.0 and later sets 'entries'  and initialize all members
3026        including 'display_term'. If YAZ 2.0 or later sees that
3027        entries was modified - we assume that it is an old handler and
3028        that 'display_term' is _not_ set.
3029     */
3030     if (bsrr->num_entries > 0)
3031     {
3032         int i;
3033         bsrr->entries = (struct scan_entry *)
3034             odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3035                        bsrr->num_entries);
3036         for (i = 0; i<bsrr->num_entries; i++)
3037         {
3038             bsrr->entries[i].term = 0;
3039             bsrr->entries[i].occurrences = 0;
3040             bsrr->entries[i].errcode = 0;
3041             bsrr->entries[i].errstring = 0;
3042             bsrr->entries[i].display_term = 0;
3043         }
3044     }
3045     save_entries = bsrr->entries;  /* save it so we can compare later */
3046
3047     bsrr->attributeset = req->attributeSet;
3048     log_scan_term_level(log_requestdetail, req->termListAndStartPoint,
3049                         bsrr->attributeset);
3050     bsrr->term_position = req->preferredPositionInResponse ?
3051         *req->preferredPositionInResponse : 1;
3052
3053     ((int (*)(void *, bend_scan_rr *))
3054      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3055
3056     if (bsrr->errcode)
3057         diagrecs_p = zget_DiagRecs(assoc->encode,
3058                                    bsrr->errcode, bsrr->errstring);
3059     else
3060     {
3061         int i;
3062         Z_Entry **tab = (Z_Entry **)
3063             odr_malloc(assoc->encode, sizeof(*tab) * bsrr->num_entries);
3064
3065         if (bsrr->status == BEND_SCAN_PARTIAL)
3066             *scanStatus = Z_Scan_partial_5;
3067         else
3068             *scanStatus = Z_Scan_success;
3069         ents->entries = tab;
3070         ents->num_entries = bsrr->num_entries;
3071         res->numberOfEntriesReturned = &ents->num_entries;
3072         res->positionOfTerm = &bsrr->term_position;
3073         for (i = 0; i < bsrr->num_entries; i++)
3074         {
3075             Z_Entry *e;
3076             Z_TermInfo *t;
3077             Odr_oct *o;
3078
3079             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3080             if (bsrr->entries[i].occurrences >= 0)
3081             {
3082                 e->which = Z_Entry_termInfo;
3083                 e->u.termInfo = t = (Z_TermInfo *)
3084                     odr_malloc(assoc->encode, sizeof(*t));
3085                 t->suggestedAttributes = 0;
3086                 t->displayTerm = 0;
3087                 if (save_entries == bsrr->entries &&
3088                     bsrr->entries[i].display_term)
3089                 {
3090                     /* the entries was _not_ set by the handler. So it's
3091                        safe to test for new member display_term. It is
3092                        NULL'ed by us.
3093                     */
3094                     t->displayTerm = odr_strdup(assoc->encode,
3095                                                 bsrr->entries[i].display_term);
3096                 }
3097                 t->alternativeTerm = 0;
3098                 t->byAttributes = 0;
3099                 t->otherTermInfo = 0;
3100                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3101                 t->term = (Z_Term *)
3102                     odr_malloc(assoc->encode, sizeof(*t->term));
3103                 t->term->which = Z_Term_general;
3104                 t->term->u.general = o =
3105                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3106                 o->buf = (unsigned char *)
3107                     odr_malloc(assoc->encode, o->len = o->size =
3108                                strlen(bsrr->entries[i].term));
3109                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3110                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3111                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3112             }
3113             else
3114             {
3115                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3116                                                   bsrr->entries[i].errcode,
3117                                                   bsrr->entries[i].errstring);
3118                 assert(drecs->num_diagRecs == 1);
3119                 e->which = Z_Entry_surrogateDiagnostic;
3120                 assert(drecs->diagRecs[0]);
3121                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3122             }
3123         }
3124     }
3125     if (diagrecs_p)
3126     {
3127         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3128         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3129     }
3130     if (log_request)
3131     {
3132         int i;
3133         WRBUF wr = wrbuf_alloc();
3134         wrbuf_printf(wr, "Scan ");
3135         for (i = 0 ; i < req->num_databaseNames; i++)
3136         {
3137             if (i)
3138                 wrbuf_printf(wr, "+");
3139             wrbuf_printf(wr, req->databaseNames[i]);
3140         }
3141
3142         wrbuf_printf(wr, " ");
3143
3144         if (bsrr->errcode)
3145             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3146         else
3147             wrbuf_printf(wr, "OK");
3148
3149         wrbuf_printf(wr, " %d - %d+%d+%d",
3150                      res->numberOfEntriesReturned ?
3151                      *res->numberOfEntriesReturned : 0,
3152                      (req->preferredPositionInResponse ?
3153                       *req->preferredPositionInResponse : 1),
3154                      *req->numberOfTermsRequested,
3155                      (res->stepSize ? *res->stepSize : 1));
3156
3157         if (bsrr->setname)
3158             wrbuf_printf(wr, "+%s", bsrr->setname);
3159
3160         wrbuf_printf(wr, " ");
3161         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3162                           bsrr->attributeset);
3163         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3164         wrbuf_destroy(wr);
3165     }
3166     return apdu;
3167 }
3168
3169 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3170     int *fd)
3171 {
3172     int i;
3173     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3174     Z_SortResponse *res = (Z_SortResponse *)
3175         odr_malloc(assoc->encode, sizeof(*res));
3176     bend_sort_rr *bsrr = (bend_sort_rr *)
3177         odr_malloc(assoc->encode, sizeof(*bsrr));
3178
3179     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3180
3181     yaz_log(log_requestdetail, "Got SortRequest.");
3182
3183     bsrr->num_input_setnames = req->num_inputResultSetNames;
3184     for (i=0;i<req->num_inputResultSetNames;i++)
3185         yaz_log(log_requestdetail, "Input resultset: '%s'",
3186                 req->inputResultSetNames[i]);
3187     bsrr->input_setnames = req->inputResultSetNames;
3188     bsrr->referenceId = req->referenceId;
3189     bsrr->output_setname = req->sortedResultSetName;
3190     yaz_log(log_requestdetail, "Output resultset: '%s'",
3191                 req->sortedResultSetName);
3192     bsrr->sort_sequence = req->sortSequence;
3193        /*FIXME - dump those sequences too */
3194     bsrr->stream = assoc->encode;
3195     bsrr->print = assoc->print;
3196
3197     bsrr->sort_status = Z_SortResponse_failure;
3198     bsrr->errcode = 0;
3199     bsrr->errstring = 0;
3200
3201     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3202
3203     res->referenceId = bsrr->referenceId;
3204     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3205     res->resultSetStatus = 0;
3206     if (bsrr->errcode)
3207     {
3208         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3209                                        bsrr->errcode, bsrr->errstring);
3210         res->diagnostics = dr->diagRecs;
3211         res->num_diagnostics = dr->num_diagRecs;
3212     }
3213     else
3214     {
3215         res->num_diagnostics = 0;
3216         res->diagnostics = 0;
3217     }
3218     res->resultCount = 0;
3219     res->otherInfo = 0;
3220
3221     apdu->which = Z_APDU_sortResponse;
3222     apdu->u.sortResponse = res;
3223     if (log_request)
3224     {
3225         WRBUF wr = wrbuf_alloc();
3226         wrbuf_printf(wr, "Sort ");
3227         if (bsrr->errcode)
3228             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3229         else
3230             wrbuf_printf(wr,  "OK -");
3231         wrbuf_printf(wr, " (");
3232         for (i = 0; i<req->num_inputResultSetNames; i++)
3233         {
3234             if (i)
3235                 wrbuf_printf(wr, "+");
3236             wrbuf_printf(wr, req->inputResultSetNames[i]);
3237         }
3238         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3239
3240         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3241         wrbuf_destroy(wr);
3242     }
3243     return apdu;
3244 }
3245
3246 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3247     int *fd)
3248 {
3249     int i;
3250     Z_DeleteResultSetRequest *req =
3251         reqb->apdu_request->u.deleteResultSetRequest;
3252     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3253         odr_malloc(assoc->encode, sizeof(*res));
3254     bend_delete_rr *bdrr = (bend_delete_rr *)
3255         odr_malloc(assoc->encode, sizeof(*bdrr));
3256     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3257
3258     yaz_log(log_requestdetail, "Got DeleteRequest.");
3259
3260     bdrr->num_setnames = req->num_resultSetList;
3261     bdrr->setnames = req->resultSetList;
3262     for (i = 0; i<req->num_resultSetList; i++)
3263         yaz_log(log_requestdetail, "resultset: '%s'",
3264                 req->resultSetList[i]);
3265     bdrr->stream = assoc->encode;
3266     bdrr->print = assoc->print;
3267     bdrr->function = *req->deleteFunction;
3268     bdrr->referenceId = req->referenceId;
3269     bdrr->statuses = 0;
3270     if (bdrr->num_setnames > 0)
3271     {
3272         bdrr->statuses = (int*)
3273             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3274                        bdrr->num_setnames);
3275         for (i = 0; i < bdrr->num_setnames; i++)
3276             bdrr->statuses[i] = 0;
3277     }
3278     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3279
3280     res->referenceId = req->referenceId;
3281
3282     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3283
3284     res->deleteListStatuses = 0;
3285     if (bdrr->num_setnames > 0)
3286     {
3287         int i;
3288         res->deleteListStatuses = (Z_ListStatuses *)
3289             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3290         res->deleteListStatuses->num = bdrr->num_setnames;
3291         res->deleteListStatuses->elements =
3292             (Z_ListStatus **)
3293             odr_malloc(assoc->encode,
3294                         sizeof(*res->deleteListStatuses->elements) *
3295                         bdrr->num_setnames);
3296         for (i = 0; i<bdrr->num_setnames; i++)
3297         {
3298             res->deleteListStatuses->elements[i] =
3299                 (Z_ListStatus *)
3300                 odr_malloc(assoc->encode,
3301                             sizeof(**res->deleteListStatuses->elements));
3302             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3303             res->deleteListStatuses->elements[i]->id =
3304                 odr_strdup(assoc->encode, bdrr->setnames[i]);
3305         }
3306     }
3307     res->numberNotDeleted = 0;
3308     res->bulkStatuses = 0;
3309     res->deleteMessage = 0;
3310     res->otherInfo = 0;
3311
3312     apdu->which = Z_APDU_deleteResultSetResponse;
3313     apdu->u.deleteResultSetResponse = res;
3314     if (log_request)
3315     {
3316         WRBUF wr = wrbuf_alloc();
3317         wrbuf_printf(wr, "Delete ");
3318         if (bdrr->delete_status)
3319             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3320         else
3321             wrbuf_printf(wr, "OK -");
3322         for (i = 0; i<req->num_resultSetList; i++)
3323             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3324         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3325         wrbuf_destroy(wr);
3326     }
3327     return apdu;
3328 }
3329
3330 static void process_close(association *assoc, request *reqb)
3331 {
3332     Z_Close *req = reqb->apdu_request->u.close;
3333     static char *reasons[] =
3334     {
3335         "finished",
3336         "shutdown",
3337         "systemProblem",
3338         "costLimit",
3339         "resources",
3340         "securityViolation",
3341         "protocolError",
3342         "lackOfActivity",
3343         "peerAbort",
3344         "unspecified"
3345     };
3346
3347     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3348         reasons[*req->closeReason], req->diagnosticInformation ?
3349         req->diagnosticInformation : "NULL");
3350     if (assoc->version < 3) /* to make do_force respond with close */
3351         assoc->version = 3;
3352     do_close_req(assoc, Z_Close_finished,
3353                  "Association terminated by client", reqb);
3354     yaz_log(log_request,"Close OK");
3355 }
3356
3357 void save_referenceId(request *reqb, Z_ReferenceId *refid)
3358 {
3359     if (refid)
3360     {
3361         reqb->len_refid = refid->len;
3362         reqb->refid = (char *)nmem_malloc(reqb->request_mem, refid->len);
3363         memcpy(reqb->refid, refid->buf, refid->len);
3364     }
3365     else
3366     {
3367         reqb->len_refid = 0;
3368         reqb->refid = NULL;
3369     }
3370 }
3371
3372 void bend_request_send(bend_association a, bend_request req, Z_APDU *res)
3373 {
3374     process_z_response(a, req, res);
3375 }
3376
3377 bend_request bend_request_mk(bend_association a)
3378 {
3379     request *nreq = request_get(&a->outgoing);
3380     nreq->request_mem = nmem_create();
3381     return nreq;
3382 }
3383
3384 Z_ReferenceId *bend_request_getid(ODR odr, bend_request req)
3385 {
3386     Z_ReferenceId *id;
3387     if (!req->refid)
3388         return 0;
3389     id = (Odr_oct *)odr_malloc(odr, sizeof(*odr));
3390     id->buf = (unsigned char *)odr_malloc(odr, req->len_refid);
3391     id->len = id->size = req->len_refid;
3392     memcpy(id->buf, req->refid, req->len_refid);
3393     return id;
3394 }
3395
3396 void bend_request_destroy(bend_request *req)
3397 {
3398     nmem_destroy((*req)->request_mem);
3399     request_release(*req);
3400     *req = NULL;
3401 }
3402
3403 int bend_backend_respond(bend_association a, bend_request req)
3404 {
3405     char *msg;
3406     int r;
3407     r = process_z_request(a, req, &msg);
3408     if (r < 0)
3409         yaz_log(YLOG_WARN, "%s", msg);
3410     return r;
3411 }
3412
3413 void bend_request_setdata(bend_request r, void *p)
3414 {
3415     r->clientData = p;
3416 }
3417
3418 void *bend_request_getdata(bend_request r)
3419 {
3420     return r->clientData;
3421 }
3422
3423 static Z_APDU *process_segmentRequest(association *assoc, request *reqb)
3424 {
3425     bend_segment_rr req;
3426
3427     req.segment = reqb->apdu_request->u.segmentRequest;
3428     req.stream = assoc->encode;
3429     req.decode = assoc->decode;
3430     req.print = assoc->print;
3431     req.association = assoc;
3432
3433     (*assoc->init->bend_segment)(assoc->backend, &req);
3434
3435     return 0;
3436 }
3437
3438 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3439 {
3440     bend_esrequest_rr esrequest;
3441     const char *ext_name = "unknown";
3442
3443     Z_ExtendedServicesRequest *req =
3444         reqb->apdu_request->u.extendedServicesRequest;
3445     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3446
3447     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3448
3449     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3450     esrequest.stream = assoc->encode;
3451     esrequest.decode = assoc->decode;
3452     esrequest.print = assoc->print;
3453     esrequest.errcode = 0;
3454     esrequest.errstring = NULL;
3455     esrequest.request = reqb;
3456     esrequest.association = assoc;
3457     esrequest.taskPackage = 0;
3458     esrequest.referenceId = req->referenceId;
3459
3460
3461     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3462     {
3463         switch(esrequest.esr->taskSpecificParameters->which)
3464         {
3465         case Z_External_itemOrder:
3466             ext_name = "ItemOrder"; break;
3467         case Z_External_update:
3468             ext_name = "Update"; break;
3469         case Z_External_update0:
3470             ext_name = "Update0"; break;
3471         case Z_External_ESAdmin:
3472             ext_name = "Admin"; break;
3473
3474         }
3475     }
3476
3477     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3478
3479     /* If the response is being delayed, return NULL */
3480     if (esrequest.request == NULL)
3481         return(NULL);
3482
3483     resp->referenceId = req->referenceId;
3484
3485     if (esrequest.errcode == -1)
3486     {
3487         /* Backend service indicates request will be processed */
3488         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3489         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3490     }
3491     else if (esrequest.errcode == 0)
3492     {
3493         /* Backend service indicates request will be processed */
3494         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3495         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3496     }
3497     else
3498     {
3499         Z_DiagRecs *diagRecs =
3500             zget_DiagRecs(assoc->encode, esrequest.errcode,
3501                           esrequest.errstring);
3502         /* Backend indicates error, request will not be processed */
3503         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3504         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3505         resp->num_diagnostics = diagRecs->num_diagRecs;
3506         resp->diagnostics = diagRecs->diagRecs;
3507         if (log_request)
3508         {
3509             WRBUF wr = wrbuf_alloc();
3510             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3511             yaz_log(log_request, "EsRequest %s", wrbuf_cstr(wr) );
3512             wrbuf_destroy(wr);
3513         }
3514
3515     }
3516     /* Do something with the members of bend_extendedservice */
3517     if (esrequest.taskPackage)
3518     {
3519         resp->taskPackage = z_ext_record_oid(
3520             assoc->encode, yaz_oid_recsyn_extended,
3521             (const char *)  esrequest.taskPackage, -1);
3522     }
3523     yaz_log(YLOG_DEBUG,"Send the result apdu");
3524     return apdu;
3525 }
3526
3527 int bend_assoc_is_alive(bend_association assoc)
3528 {
3529     if (assoc->state == ASSOC_DEAD)
3530         return 0; /* already marked as dead. Don't check I/O chan anymore */
3531
3532     return iochan_is_alive(assoc->client_chan);
3533 }
3534
3535
3536 /*
3537  * Local variables:
3538  * c-basic-offset: 4
3539  * indent-tabs-mode: nil
3540  * End:
3541  * vim: shiftwidth=4 tabstop=8 expandtab
3542  */
3543