src/seshigh.c

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