src/seshigh.c

   1 /*
   2  * Copyright (C) 1995-2007, Index Data ApS
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: seshigh.c,v 1.110 2007-02-24 18:44:54 adam Exp $
   6  */
   7 /**
   8  * \file seshigh.c
   9  * \brief Implements GFS session logic.
  10  *
  11  * Frontend server logic.
  12  *
  13  * This code receives incoming APDUs, and handles client requests by means
  14  * of the backend API.
  15  *
  16  * Some of the code is getting quite involved, compared to simpler servers -
  17  * primarily because it is asynchronous both in the communication with
  18  * the user and the backend. We think the complexity will pay off in
  19  * the form of greater flexibility when more asynchronous facilities
  20  * are implemented.
  21  *
  22  * Memory management has become somewhat involved. In the simple case, where
  23  * only one PDU is pending at a time, it will simply reuse the same memory,
  24  * once it has found its working size. When we enable multiple concurrent
  25  * operations, perhaps even with multiple parallel calls to the backend, it
  26  * will maintain a pool of buffers for encoding and decoding, trying to
  27  * minimize memory allocation/deallocation during normal operation.
  28  *
  29  */
  30
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <assert.h>
  34 #include <ctype.h>
  35
  36 #if HAVE_SYS_TYPES_H
  37 #include <sys/types.h>
  38 #endif
  39 #if HAVE_SYS_STAT_H
  40 #include <sys/stat.h>
  41 #endif
  42
  43 #ifdef WIN32
  44 #include <io.h>
  45 #define S_ISREG(x) (x & _S_IFREG)
  46 #include <process.h>
  47 #endif
  48
  49 #if HAVE_UNISTD_H
  50 #include <unistd.h>
  51 #endif
  52
  53 #if YAZ_HAVE_XML2
  54 #include <libxml/parser.h>
  55 #include <libxml/tree.h>
  56 #endif
  57
  58 #include <yaz/yconfig.h>
  59 #include <yaz/xmalloc.h>
  60 #include <yaz/comstack.h>
  61 #include "eventl.h"
  62 #include "session.h"
  63 #include "mime.h"
  64 #include <yaz/proto.h>
  65 #include <yaz/oid.h>
  66 #include <yaz/log.h>
  67 #include <yaz/logrpn.h>
  68 #include <yaz/querytowrbuf.h>
  69 #include <yaz/statserv.h>
  70 #include <yaz/diagbib1.h>
  71 #include <yaz/charneg.h>
  72 #include <yaz/otherinfo.h>
  73 #include <yaz/yaz-util.h>
  74 #include <yaz/pquery.h>
  75
  76 #include <yaz/srw.h>
  77 #include <yaz/backend.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         }
 402         iochan_clearflag (h, EVENT_OUTPUT);
 403         if (conn->io_pending)
 404         {   /* cs_accept didn't complete */
 405             assoc->cs_accept_mask =
 406                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 407                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 408
 409             iochan_setflag (h, assoc->cs_accept_mask);
 410         }
 411         else
 412         {   /* cs_accept completed. Prepare for reading (cs_get) */
 413             assoc->cs_accept_mask = 0;
 414             assoc->cs_get_mask = EVENT_INPUT;
 415             iochan_setflag (h, assoc->cs_get_mask);
 416         }
 417         return;
 418     }
 419     if (event & assoc->cs_get_mask) /* input */
 420     {
 421         if (!ir_read(h, event))
 422             return;
 423         req = request_head(&assoc->incoming);
 424         if (req->state == REQUEST_IDLE)
 425         {
 426             request_deq(&assoc->incoming);
 427             process_gdu_request(assoc, req);
 428         }
 429     }
 430     if (event & assoc->cs_put_mask)
 431     {
 432         request *req = request_head(&assoc->outgoing);
 433
 434         assoc->cs_put_mask = 0;
 435         yaz_log(YLOG_DEBUG, "ir_session (output)");
 436         req->state = REQUEST_PENDING;
 437         switch (res = cs_put(conn, req->response, req->len_response))
 438         {
 439         case -1:
 440             yaz_log(log_sessiondetail, "Connection closed by client");
 441             cs_close(conn);
 442             destroy_association(assoc);
 443             iochan_destroy(h);
 444             break;
 445         case 0: /* all sent - release the request structure */
 446             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 447 #if 0
 448             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 449                     req->response);
 450 #endif
 451             nmem_destroy(req->request_mem);
 452             request_deq(&assoc->outgoing);
 453             request_release(req);
 454             if (!request_head(&assoc->outgoing))
 455             {   /* restore mask for cs_get operation ... */
 456                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 457                 iochan_setflag(h, assoc->cs_get_mask);
 458                 if (assoc->state == ASSOC_DEAD)
 459                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 460             }
 461             else
 462             {
 463                 assoc->cs_put_mask = EVENT_OUTPUT;
 464             }
 465             break;
 466         default:
 467             if (conn->io_pending & CS_WANT_WRITE)
 468                 assoc->cs_put_mask |= EVENT_OUTPUT;
 469             if (conn->io_pending & CS_WANT_READ)
 470                 assoc->cs_put_mask |= EVENT_INPUT;
 471             iochan_setflag(h, assoc->cs_put_mask);
 472         }
 473     }
 474     if (event & EVENT_EXCEPT)
 475     {
 476         yaz_log(YLOG_WARN, "ir_session (exception)");
 477         cs_close(conn);
 478         destroy_association(assoc);
 479         iochan_destroy(h);
 480     }
 481 }
 482
 483 static int process_z_request(association *assoc, request *req, char **msg);
 484
 485
 486 static void assoc_init_reset(association *assoc)
 487 {
 488     xfree (assoc->init);
 489     assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init));
 490
 491     assoc->init->stream = assoc->encode;
 492     assoc->init->print = assoc->print;
 493     assoc->init->auth = 0;
 494     assoc->init->referenceId = 0;
 495     assoc->init->implementation_version = 0;
 496     assoc->init->implementation_id = 0;
 497     assoc->init->implementation_name = 0;
 498     assoc->init->bend_sort = NULL;
 499     assoc->init->bend_search = NULL;
 500     assoc->init->bend_present = NULL;
 501     assoc->init->bend_esrequest = NULL;
 502     assoc->init->bend_delete = NULL;
 503     assoc->init->bend_scan = NULL;
 504     assoc->init->bend_segment = NULL;
 505     assoc->init->bend_fetch = NULL;
 506     assoc->init->bend_explain = NULL;
 507     assoc->init->bend_srw_scan = NULL;
 508     assoc->init->bend_srw_update = NULL;
 509
 510     assoc->init->charneg_request = NULL;
 511     assoc->init->charneg_response = NULL;
 512
 513     assoc->init->decode = assoc->decode;
 514     assoc->init->peer_name =
 515         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
 516
 517     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 518 }
 519
 520 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 521 {
 522     statserv_options_block *cb = statserv_getcontrol();
 523     if (!assoc->init)
 524     {
 525         const char *encoding = "UTF-8";
 526         Z_External *ce;
 527         bend_initresult *binitres;
 528
 529         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 530         assoc_init_reset(assoc);
 531
 532         if (sr->username)
 533         {
 534             Z_IdAuthentication *auth = odr_malloc(assoc->decode, sizeof(*auth));
 535             int len;
 536
 537             len = strlen(sr->username) + 1;
 538             if (sr->password)
 539                 len += strlen(sr->password) + 2;
 540             auth->which = Z_IdAuthentication_open;
 541             auth->u.open = odr_malloc(assoc->decode, len);
 542             strcpy(auth->u.open, sr->username);
 543             if (sr->password && *sr->password)
 544             {
 545                 strcat(auth->u.open, "/");
 546                 strcat(auth->u.open, sr->password);
 547             }
 548             assoc->init->auth = auth;
 549         }
 550
 551 #if 1
 552         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 553         assoc->init->charneg_request = ce->u.charNeg3;
 554 #endif
 555         assoc->backend = 0;
 556         if (!(binitres = (*cb->bend_init)(assoc->init)))
 557         {
 558             assoc->state = ASSOC_DEAD;
 559             yaz_add_srw_diagnostic(assoc->encode, d, num,
 560                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 561             return 0;
 562         }
 563         assoc->backend = binitres->handle;
 564         assoc->init->auth = 0;
 565         if (binitres->errcode)
 566         {
 567             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 568             assoc->state = ASSOC_DEAD;
 569             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 570                                    binitres->errstring);
 571             return 0;
 572         }
 573         return 1;
 574     }
 575     return 1;
 576 }
 577
 578 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 579 {
 580 #if YAZ_HAVE_XML2
 581     yaz_record_conv_t rc = 0;
 582     const char *match_schema = 0;
 583     int *match_syntax = 0;
 584
 585     if (assoc->server)
 586     {
 587         int r;
 588         const char *input_schema = yaz_get_esn(rr->comp);
 589         Odr_oid *input_syntax_raw = rr->request_format_raw;
 590
 591         const char *backend_schema = 0;
 592         Odr_oid *backend_syntax = 0;
 593
 594         r = yaz_retrieval_request(assoc->server->retrieval,
 595                                   input_schema,
 596                                   input_syntax_raw,
 597                                   &match_schema,
 598                                   &match_syntax,
 599                                   &rc,
 600                                   &backend_schema,
 601                                   &backend_syntax);
 602         if (r == -1) /* error ? */
 603         {
 604             const char *details = yaz_retrieval_get_error(
 605                 assoc->server->retrieval);
 606
 607             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 608             if (details)
 609                 rr->errstring = odr_strdup(rr->stream, details);
 610             return -1;
 611         }
 612         else if (r == 1 || r == 3)
 613         {
 614             const char *details = input_schema;
 615             rr->errcode =
 616                 YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
 617             if (details)
 618                 rr->errstring = odr_strdup(rr->stream, details);
 619             return -1;
 620         }
 621         else if (r == 2)
 622         {
 623             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 624             if (input_syntax_raw)
 625             {
 626                 char oidbuf[OID_STR_MAX];
 627                 oid_to_dotstring(input_syntax_raw, oidbuf);
 628                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 629             }
 630             return -1;
 631         }
 632         if (backend_schema)
 633         {
 634             yaz_set_esn(&rr->comp, backend_schema, rr->stream->mem);
 635         }
 636         if (backend_syntax)
 637         {
 638             oident *oident_syntax = oid_getentbyoid(backend_syntax);
 639
 640             rr->request_format_raw = backend_syntax;
 641
 642             if (oident_syntax)
 643                 rr->request_format = oident_syntax->value;
 644             else
 645                 rr->request_format = VAL_NONE;
 646         }
 647     }
 648     (*assoc->init->bend_fetch)(assoc->backend, rr);
 649     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
 650     {   /* post conversion must take place .. */
 651         WRBUF output_record = wrbuf_alloc();
 652         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 653         if (r)
 654         {
 655             const char *details = yaz_record_conv_get_error(rc);
 656             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 657             if (details)
 658                 rr->errstring = odr_strdup(rr->stream, details);
 659         }
 660         else
 661         {
 662             rr->len = wrbuf_len(output_record);
 663             rr->record = odr_malloc(rr->stream, rr->len);
 664             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 665         }
 666         wrbuf_free(output_record, 1);
 667     }
 668     if (match_syntax)
 669     {
 670         struct oident *oi = oid_getentbyoid(match_syntax);
 671         rr->output_format = oi ? oi->value : VAL_NONE;
 672         rr->output_format_raw = match_syntax;
 673     }
 674     if (match_schema)
 675         rr->schema = odr_strdup(rr->stream, match_schema);
 676     return 0;
 677 #else
 678     (*assoc->init->bend_fetch)(assoc->backend, rr);
 679 #endif
 680 }
 681
 682 static int srw_bend_fetch(association *assoc, int pos,
 683                           Z_SRW_searchRetrieveRequest *srw_req,
 684                           Z_SRW_record *record,
 685                           const char **addinfo)
 686 {
 687     bend_fetch_rr rr;
 688     ODR o = assoc->encode;
 689
 690     rr.setname = "default";
 691     rr.number = pos;
 692     rr.referenceId = 0;
 693     rr.request_format = VAL_TEXT_XML;
 694     rr.request_format_raw = yaz_oidval_to_z3950oid(assoc->decode,
 695                                                    CLASS_RECSYN,
 696                                                    VAL_TEXT_XML);
 697     rr.comp = (Z_RecordComposition *)
 698             odr_malloc(assoc->decode, sizeof(*rr.comp));
 699     rr.comp->which = Z_RecordComp_complex;
 700     rr.comp->u.complex = (Z_CompSpec *)
 701             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 702     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 703         odr_malloc(assoc->encode, sizeof(bool_t));
 704     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 705     rr.comp->u.complex->num_dbSpecific = 0;
 706     rr.comp->u.complex->dbSpecific = 0;
 707     rr.comp->u.complex->num_recordSyntax = 0;
 708     rr.comp->u.complex->recordSyntax = 0;
 709
 710     rr.comp->u.complex->generic = (Z_Specification *)
 711             odr_malloc(assoc->decode, sizeof(Z_Specification));
 712
 713     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 714     rr.comp->u.complex->generic->which = Z_Schema_uri;
 715     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 716
 717     /* ESN = recordSchema if recordSchema is present */
 718     rr.comp->u.complex->generic->elementSpec = 0;
 719     if (srw_req->recordSchema)
 720     {
 721         rr.comp->u.complex->generic->elementSpec =
 722             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 723         rr.comp->u.complex->generic->elementSpec->which =
 724             Z_ElementSpec_elementSetName;
 725         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 726             srw_req->recordSchema;
 727     }
 728
 729     rr.stream = assoc->encode;
 730     rr.print = assoc->print;
 731
 732     rr.basename = 0;
 733     rr.len = 0;
 734     rr.record = 0;
 735     rr.last_in_set = 0;
 736     rr.errcode = 0;
 737     rr.errstring = 0;
 738     rr.surrogate_flag = 0;
 739     rr.schema = srw_req->recordSchema;
 740
 741     if (!assoc->init->bend_fetch)
 742         return 1;
 743
 744     retrieve_fetch(assoc, &rr);
 745
 746     if (rr.errcode && rr.surrogate_flag)
 747     {
 748         int code = yaz_diag_bib1_to_srw(rr.errcode);
 749         const char *message = yaz_diag_srw_str(code);
 750         int len = 200;
 751         if (message)
 752             len += strlen(message);
 753         if (rr.errstring)
 754             len += strlen(rr.errstring);
 755
 756         record->recordData_buf = odr_malloc(o, len);
 757
 758         sprintf(record->recordData_buf, "<diagnostic "
 759                 "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
 760                 " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
 761         if (rr.errstring)
 762             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 763                     " <details>%s</details>\n", rr.errstring);
 764         if (message)
 765             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 766                     " <message>%s</message>\n", message);
 767         sprintf(record->recordData_buf + strlen(record->recordData_buf),
 768                 "</diagnostic>\n");
 769         record->recordData_len = strlen(record->recordData_buf);
 770         record->recordPosition = odr_intdup(o, pos);
 771         record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
 772         return 0;
 773     }
 774     else if (rr.len >= 0)
 775     {
 776         record->recordData_buf = rr.record;
 777         record->recordData_len = rr.len;
 778         record->recordPosition = odr_intdup(o, pos);
 779         if (rr.schema)
 780             record->recordSchema = odr_strdup(o, rr.schema);
 781         else
 782             record->recordSchema = 0;
 783     }
 784     if (rr.errcode)
 785     {
 786         *addinfo = rr.errstring;
 787         return rr.errcode;
 788     }
 789     return 0;
 790 }
 791
 792 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 793                    Z_Query *query_result)
 794 {
 795     /* have a CQL query and  CQL to PQF transform .. */
 796     CQL_parser cp = cql_parser_create();
 797     int r;
 798     int srw_errcode = 0;
 799     const char *add = 0;
 800     char rpn_buf[5120];
 801
 802     r = cql_parser_string(cp, cql);
 803     if (r)
 804     {
 805         /* CQL syntax error */
 806         srw_errcode = 10;
 807     }
 808     if (!r)
 809     {
 810         /* Syntax OK */
 811         r = cql_transform_buf(ct,
 812                               cql_parser_result(cp),
 813                               rpn_buf, sizeof(rpn_buf)-1);
 814         if (r)
 815             srw_errcode  = cql_transform_error(ct, &add);
 816     }
 817     if (!r)
 818     {
 819         /* Syntax & transform OK. */
 820         /* Convert PQF string to Z39.50 to RPN query struct */
 821         YAZ_PQF_Parser pp = yaz_pqf_create();
 822         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 823         if (!rpnquery)
 824         {
 825             size_t off;
 826             const char *pqf_msg;
 827             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 828             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 829                     pqf_msg, code);
 830             srw_errcode = 10;
 831         }
 832         else
 833         {
 834             query_result->which = Z_Query_type_1;
 835             query_result->u.type_1 = rpnquery;
 836         }
 837         yaz_pqf_destroy(pp);
 838     }
 839     cql_parser_destroy(cp);
 840     return srw_errcode;
 841 }
 842
 843 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 844                         Z_AttributesPlusTerm *result)
 845 {
 846     Z_Query query;
 847     Z_RPNQuery *rpn;
 848     int srw_error = cql2pqf(odr, cql, ct, &query);
 849     if (srw_error)
 850         return srw_error;
 851     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 852         return 10; /* bad query type */
 853     rpn = query.u.type_1;
 854     if (!rpn->RPNStructure)
 855         return 10; /* must be structure */
 856     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 857         return 10; /* must be simple */
 858     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 859         return 10; /* must be attributes plus term node .. */
 860     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 861            sizeof(*result));
 862     return 0;
 863 }
 864
 865 static void srw_bend_search(association *assoc, request *req,
 866                             Z_SRW_PDU *sr,
 867                             Z_SRW_searchRetrieveResponse *srw_res,
 868                             int *http_code)
 869 {
 870     int srw_error = 0;
 871     Z_External *ext;
 872     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 873
 874     *http_code = 200;
 875     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 876     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 877     if (srw_res->num_diagnostics == 0 && assoc->init)
 878     {
 879         bend_search_rr rr;
 880         rr.setname = "default";
 881         rr.replace_set = 1;
 882         rr.num_bases = 1;
 883         rr.basenames = &srw_req->database;
 884         rr.referenceId = 0;
 885         rr.srw_sortKeys = 0;
 886         rr.srw_setname = 0;
 887         rr.srw_setnameIdleTime = 0;
 888         rr.estimated_hit_count = 0;
 889         rr.partial_resultset = 0;
 890         rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 891         rr.query->u.type_1 = 0;
 892
 893         if (srw_req->query_type == Z_SRW_query_type_cql)
 894         {
 895             if (assoc->server && assoc->server->cql_transform)
 896             {
 897                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 898                                           assoc->server->cql_transform,
 899                                           rr.query);
 900                 if (srw_errcode)
 901                 {
 902                     yaz_add_srw_diagnostic(assoc->encode,
 903                                            &srw_res->diagnostics,
 904                                            &srw_res->num_diagnostics,
 905                                            srw_errcode, 0);
 906                 }
 907             }
 908             else
 909             {
 910                 /* CQL query to backend. Wrap it - Z39.50 style */
 911                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 912                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 913                                                         "1.2.840.10003.16.2");
 914                 ext->indirect_reference = 0;
 915                 ext->descriptor = 0;
 916                 ext->which = Z_External_CQL;
 917                 ext->u.cql = srw_req->query.cql;
 918
 919                 rr.query->which = Z_Query_type_104;
 920                 rr.query->u.type_104 =  ext;
 921             }
 922         }
 923         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 924         {
 925             Z_RPNQuery *RPNquery;
 926             YAZ_PQF_Parser pqf_parser;
 927
 928             pqf_parser = yaz_pqf_create ();
 929
 930             RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
 931                                       srw_req->query.pqf);
 932             if (!RPNquery)
 933             {
 934                 const char *pqf_msg;
 935                 size_t off;
 936                 int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
 937                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 938                         code, pqf_msg, (long) off);
 939                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 940             }
 941
 942             rr.query->which = Z_Query_type_1;
 943             rr.query->u.type_1 =  RPNquery;
 944
 945             yaz_pqf_destroy (pqf_parser);
 946         }
 947         else
 948         {
 949             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 950                                    &srw_res->num_diagnostics,
 951                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 952         }
 953         if (rr.query->u.type_1)
 954         {
 955             rr.stream = assoc->encode;
 956             rr.decode = assoc->decode;
 957             rr.print = assoc->print;
 958             rr.request = req;
 959             if ( srw_req->sort.sortKeys )
 960                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 961                                              srw_req->sort.sortKeys );
 962             rr.association = assoc;
 963             rr.fd = 0;
 964             rr.hits = 0;
 965             rr.errcode = 0;
 966             rr.errstring = 0;
 967             rr.search_info = 0;
 968             yaz_log_zquery_level(log_requestdetail,rr.query);
 969
 970             (assoc->init->bend_search)(assoc->backend, &rr);
 971             if (rr.errcode)
 972             {
 973                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 974                 {
 975                     *http_code = 404;
 976                 }
 977                 else
 978                 {
 979                     srw_error = yaz_diag_bib1_to_srw (rr.errcode);
 980                     yaz_add_srw_diagnostic(assoc->encode,
 981                                            &srw_res->diagnostics,
 982                                            &srw_res->num_diagnostics,
 983                                            srw_error, rr.errstring);
 984                 }
 985             }
 986             else
 987             {
 988                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
 989                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
 990
 991                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
 992                         start, number, rr.hits);
 993
 994                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 995                 if (rr.srw_setname)
 996                 {
 997                     srw_res->resultSetId =
 998                         odr_strdup(assoc->encode, rr.srw_setname );
 999                     srw_res->resultSetIdleTime =
1000                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
1001                 }
1002
1003                 if ((rr.hits > 0 && start > rr.hits) || start < 1)
1004                 {
1005                     yaz_add_srw_diagnostic(
1006                         assoc->encode,
1007                         &srw_res->diagnostics, &srw_res->num_diagnostics,
1008                         YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1009                 }
1010                 else if (number > 0)
1011                 {
1012                     int i;
1013                     int ok = 1;
1014                     if (start + number > rr.hits)
1015                         number = rr.hits - start + 1;
1016
1017                     /* Call bend_present if defined */
1018                     if (assoc->init->bend_present)
1019                     {
1020                         bend_present_rr *bprr = (bend_present_rr*)
1021                             odr_malloc (assoc->decode, sizeof(*bprr));
1022                         bprr->setname = "default";
1023                         bprr->start = start;
1024                         bprr->number = number;
1025                         bprr->format = VAL_TEXT_XML;
1026                         if (srw_req->recordSchema)
1027                         {
1028                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1029                                                                             sizeof(*bprr->comp));
1030                             bprr->comp->which = Z_RecordComp_simple;
1031                             bprr->comp->u.simple = (Z_ElementSetNames *)
1032                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1033                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1034                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1035                         }
1036                         else
1037                         {
1038                             bprr->comp = 0;
1039                         }
1040                         bprr->stream = assoc->encode;
1041                         bprr->referenceId = 0;
1042                         bprr->print = assoc->print;
1043                         bprr->request = req;
1044                         bprr->association = assoc;
1045                         bprr->errcode = 0;
1046                         bprr->errstring = NULL;
1047                         (*assoc->init->bend_present)(assoc->backend, bprr);
1048
1049                         if (!bprr->request)
1050                             return;
1051                         if (bprr->errcode)
1052                         {
1053                             srw_error = yaz_diag_bib1_to_srw (bprr->errcode);
1054                             yaz_add_srw_diagnostic(assoc->encode,
1055                                                    &srw_res->diagnostics,
1056                                                    &srw_res->num_diagnostics,
1057                                                    srw_error, bprr->errstring);
1058                             ok = 0;
1059                         }
1060                     }
1061
1062                     if (ok)
1063                     {
1064                         int j = 0;
1065                         int packing = Z_SRW_recordPacking_string;
1066                         if (srw_req->recordPacking)
1067                         {
1068                             packing =
1069                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1070                             if (packing == -1)
1071                                 packing = Z_SRW_recordPacking_string;
1072                         }
1073                         srw_res->records = (Z_SRW_record *)
1074                             odr_malloc(assoc->encode,
1075                                        number * sizeof(*srw_res->records));
1076
1077                         srw_res->extra_records = (Z_SRW_extra_record **)
1078                             odr_malloc(assoc->encode,
1079                                        number*sizeof(*srw_res->extra_records));
1080
1081                         for (i = 0; i<number; i++)
1082                         {
1083                             int errcode;
1084                             const char *addinfo = 0;
1085
1086                             srw_res->records[j].recordPacking = packing;
1087                             srw_res->records[j].recordData_buf = 0;
1088                             srw_res->extra_records[j] = 0;
1089                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1090                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1091                                                      srw_res->records + j,
1092                                                      &addinfo);
1093                             if (errcode)
1094                             {
1095                                 yaz_add_srw_diagnostic(assoc->encode,
1096                                                        &srw_res->diagnostics,
1097                                                        &srw_res->num_diagnostics,
1098                                                        yaz_diag_bib1_to_srw (errcode),
1099                                                        addinfo);
1100
1101                                 break;
1102                             }
1103                             if (srw_res->records[j].recordData_buf)
1104                                 j++;
1105                         }
1106                         srw_res->num_records = j;
1107                         if (!j)
1108                             srw_res->records = 0;
1109                     }
1110                 }
1111                 if (rr.estimated_hit_count || rr.partial_resultset)
1112                 {
1113                     yaz_add_srw_diagnostic(
1114                         assoc->encode,
1115                         &srw_res->diagnostics,
1116                         &srw_res->num_diagnostics,
1117                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1118                         0);
1119                 }
1120             }
1121         }
1122     }
1123     if (log_request)
1124     {
1125         const char *querystr = "?";
1126         const char *querytype = "?";
1127         WRBUF wr = wrbuf_alloc();
1128
1129         switch (srw_req->query_type)
1130         {
1131         case Z_SRW_query_type_cql:
1132             querytype = "CQL";
1133             querystr = srw_req->query.cql;
1134             break;
1135         case Z_SRW_query_type_pqf:
1136             querytype = "PQF";
1137             querystr = srw_req->query.pqf;
1138             break;
1139         }
1140         wrbuf_printf(wr, "SRWSearch ");
1141         wrbuf_printf(wr, srw_req->database);
1142         wrbuf_printf(wr, " ");
1143         if (srw_res->num_diagnostics)
1144             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1145         else if (*http_code != 200)
1146             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1147         else if (srw_res->numberOfRecords)
1148         {
1149             wrbuf_printf(wr, "OK %d",
1150                          (srw_res->numberOfRecords ?
1151                           *srw_res->numberOfRecords : 0));
1152         }
1153         wrbuf_printf(wr, " %s %d+%d",
1154                      (srw_res->resultSetId ?
1155                       srw_res->resultSetId : "-"),
1156                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1157                      srw_res->num_records);
1158         yaz_log(log_request, "%s %s: %s", wrbuf_buf(wr), querytype, querystr);
1159         wrbuf_free(wr, 1);
1160     }
1161 }
1162
1163 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1164 {
1165 #if YAZ_HAVE_XML2
1166     xmlNodePtr ptr = rr->server_node_ptr;
1167     if (!ptr)
1168         return 0;
1169     for (ptr = ptr->children; ptr; ptr = ptr->next)
1170     {
1171         if (ptr->type != XML_ELEMENT_NODE)
1172             continue;
1173         if (!strcmp((const char *) ptr->name, "explain"))
1174         {
1175             int len;
1176             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1177             xmlChar *buf_out;
1178             char *content;
1179
1180             ptr = xmlCopyNode(ptr, 1);
1181
1182             xmlDocSetRootElement(doc, ptr);
1183
1184             xmlDocDumpMemory(doc, &buf_out, &len);
1185             content = (char*) odr_malloc(rr->stream, 1+len);
1186             memcpy(content, buf_out, len);
1187             content[len] = '\0';
1188
1189             xmlFree(buf_out);
1190             xmlFreeDoc(doc);
1191             rr->explain_buf = content;
1192             return 0;
1193         }
1194     }
1195 #endif
1196     return 0;
1197 }
1198
1199 static void srw_bend_explain(association *assoc, request *req,
1200                              Z_SRW_PDU *sr,
1201                              Z_SRW_explainResponse *srw_res,
1202                              int *http_code)
1203 {
1204     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1205     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1206     *http_code = 404;
1207     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1208     if (assoc->init)
1209     {
1210         bend_explain_rr rr;
1211
1212         rr.stream = assoc->encode;
1213         rr.decode = assoc->decode;
1214         rr.print = assoc->print;
1215         rr.explain_buf = 0;
1216         rr.database = srw_req->database;
1217         if (assoc->server)
1218             rr.server_node_ptr = assoc->server->server_node_ptr;
1219         else
1220             rr.server_node_ptr = 0;
1221         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1222         if (assoc->init->bend_explain)
1223             (*assoc->init->bend_explain)(assoc->backend, &rr);
1224         else
1225             srw_bend_explain_default(assoc->backend, &rr);
1226
1227         if (rr.explain_buf)
1228         {
1229             int packing = Z_SRW_recordPacking_string;
1230             if (srw_req->recordPacking)
1231             {
1232                 packing =
1233                     yaz_srw_str_to_pack(srw_req->recordPacking);
1234                 if (packing == -1)
1235                     packing = Z_SRW_recordPacking_string;
1236             }
1237             srw_res->record.recordSchema = rr.schema;
1238             srw_res->record.recordPacking = packing;
1239             srw_res->record.recordData_buf = rr.explain_buf;
1240             srw_res->record.recordData_len = strlen(rr.explain_buf);
1241             srw_res->record.recordPosition = 0;
1242             *http_code = 200;
1243         }
1244     }
1245 }
1246
1247 static void srw_bend_scan(association *assoc, request *req,
1248                           Z_SRW_PDU *sr,
1249                           Z_SRW_scanResponse *srw_res,
1250                           int *http_code)
1251 {
1252     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1253     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1254
1255     *http_code = 200;
1256     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1257     if (srw_res->num_diagnostics == 0 && assoc->init)
1258     {
1259         struct scan_entry *save_entries;
1260
1261         bend_scan_rr *bsrr = (bend_scan_rr *)
1262             odr_malloc (assoc->encode, sizeof(*bsrr));
1263         bsrr->num_bases = 1;
1264         bsrr->basenames = &srw_req->database;
1265
1266         bsrr->num_entries = srw_req->maximumTerms ?
1267             *srw_req->maximumTerms : 10;
1268         bsrr->term_position = srw_req->responsePosition ?
1269             *srw_req->responsePosition : 1;
1270
1271         bsrr->errcode = 0;
1272         bsrr->errstring = 0;
1273         bsrr->referenceId = 0;
1274         bsrr->stream = assoc->encode;
1275         bsrr->print = assoc->print;
1276         bsrr->step_size = odr_intdup(assoc->decode, 0);
1277         bsrr->entries = 0;
1278
1279         if (bsrr->num_entries > 0)
1280         {
1281             int i;
1282             bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1283                                        bsrr->num_entries);
1284             for (i = 0; i<bsrr->num_entries; i++)
1285             {
1286                 bsrr->entries[i].term = 0;
1287                 bsrr->entries[i].occurrences = 0;
1288                 bsrr->entries[i].errcode = 0;
1289                 bsrr->entries[i].errstring = 0;
1290                 bsrr->entries[i].display_term = 0;
1291             }
1292         }
1293         save_entries = bsrr->entries;  /* save it so we can compare later */
1294
1295         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1296             assoc->init->bend_scan)
1297         {
1298             Odr_oid *scan_attributeSet = 0;
1299             oident *attset;
1300             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1301
1302             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1303                                       &scan_attributeSet,
1304                                       srw_req->scanClause.pqf);
1305             if (scan_attributeSet &&
1306                 (attset = oid_getentbyoid(scan_attributeSet)) &&
1307                 (attset->oclass == CLASS_ATTSET ||
1308                  attset->oclass == CLASS_GENERAL))
1309                 bsrr->attributeset = attset->value;
1310             else
1311                 bsrr->attributeset = VAL_NONE;
1312             yaz_pqf_destroy(pqf_parser);
1313             bsrr->scanClause = 0;
1314             ((int (*)(void *, bend_scan_rr *))
1315              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1316         }
1317         else if (srw_req->query_type == Z_SRW_query_type_cql
1318                  && assoc->init->bend_scan && assoc->server
1319                  && assoc->server->cql_transform)
1320         {
1321             int srw_error;
1322             bsrr->scanClause = 0;
1323             bsrr->attributeset = VAL_NONE;
1324             bsrr->term = odr_malloc(assoc->decode, sizeof(*bsrr->term));
1325             srw_error = cql2pqf_scan(assoc->encode,
1326                                      srw_req->scanClause.cql,
1327                                      assoc->server->cql_transform,
1328                                      bsrr->term);
1329             if (srw_error)
1330                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1331                                        &srw_res->num_diagnostics,
1332                                        srw_error, 0);
1333             else
1334             {
1335                 ((int (*)(void *, bend_scan_rr *))
1336                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1337             }
1338         }
1339         else if (srw_req->query_type == Z_SRW_query_type_cql
1340                  && assoc->init->bend_srw_scan)
1341         {
1342             bsrr->term = 0;
1343             bsrr->attributeset = VAL_NONE;
1344             bsrr->scanClause = srw_req->scanClause.cql;
1345             ((int (*)(void *, bend_scan_rr *))
1346              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1347         }
1348         else
1349         {
1350             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1351                                    &srw_res->num_diagnostics,
1352                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1353         }
1354         if (bsrr->errcode)
1355         {
1356             int srw_error;
1357             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1358             {
1359                 *http_code = 404;
1360                 return;
1361             }
1362             srw_error = yaz_diag_bib1_to_srw (bsrr->errcode);
1363
1364             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1365                                    &srw_res->num_diagnostics,
1366                                    srw_error, bsrr->errstring);
1367         }
1368         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1369         {
1370             int i;
1371             srw_res->terms = (Z_SRW_scanTerm*)
1372                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1373                            bsrr->num_entries);
1374
1375             srw_res->num_terms =  bsrr->num_entries;
1376             for (i = 0; i<bsrr->num_entries; i++)
1377             {
1378                 Z_SRW_scanTerm *t = srw_res->terms + i;
1379                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1380                 t->numberOfRecords =
1381                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1382                 t->displayTerm = 0;
1383                 if (save_entries == bsrr->entries &&
1384                     bsrr->entries[i].display_term)
1385                 {
1386                     /* the entries was _not_ set by the handler. So it's
1387                        safe to test for new member display_term. It is
1388                        NULL'ed by us.
1389                     */
1390                     t->displayTerm = odr_strdup(assoc->encode,
1391                                                 bsrr->entries[i].display_term);
1392                 }
1393                 t->whereInList = 0;
1394             }
1395         }
1396     }
1397     if (log_request)
1398     {
1399         WRBUF wr = wrbuf_alloc();
1400         const char *querytype = 0;
1401         const char *querystr = 0;
1402
1403         switch(srw_req->query_type)
1404         {
1405         case Z_SRW_query_type_pqf:
1406             querytype = "PQF";
1407             querystr = srw_req->scanClause.pqf;
1408             break;
1409         case Z_SRW_query_type_cql:
1410             querytype = "CQL";
1411             querystr = srw_req->scanClause.cql;
1412             break;
1413         default:
1414             querytype = "UNKNOWN";
1415             querystr = "";
1416         }
1417
1418         wrbuf_printf(wr, "SRWScan ");
1419         wrbuf_printf(wr, srw_req->database);
1420         wrbuf_printf(wr, " ");
1421
1422         if (srw_res->num_diagnostics)
1423             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1424         else if (srw_res->num_terms)
1425             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1426         else
1427             wrbuf_printf(wr, "OK - - ");
1428
1429         wrbuf_printf(wr, "%d+%d+0 ",
1430                      (srw_req->responsePosition ?
1431                       *srw_req->responsePosition : 1),
1432                      (srw_req->maximumTerms ?
1433                       *srw_req->maximumTerms : 1));
1434         /* there is no step size in SRU/W ??? */
1435         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1436         yaz_log(log_request, "%s ", wrbuf_buf(wr) );
1437         wrbuf_free(wr, 1);
1438     }
1439
1440 }
1441
1442 static void srw_bend_update(association *assoc, request *req,
1443                             Z_SRW_PDU *sr,
1444                             Z_SRW_updateResponse *srw_res,
1445                             int *http_code)
1446 {
1447     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1448     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1449     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1450     *http_code = 404;
1451     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1452     if (assoc->init)
1453     {
1454         bend_update_rr rr;
1455         Z_SRW_extra_record *extra = srw_req->extra_record;
1456
1457         rr.stream = assoc->encode;
1458         rr.print = assoc->print;
1459         rr.num_bases = 1;
1460         rr.basenames = &srw_req->database;
1461         rr.operation = srw_req->operation;
1462         rr.operation_status = "failed";
1463         rr.record_id = 0;
1464         rr.record_versions = 0;
1465         rr.num_versions = 0;
1466         rr.record_packing = "string";
1467         rr.record_schema = 0;
1468         rr.record_data = 0;
1469         rr.extra_record_data = 0;
1470         rr.extra_request_data = 0;
1471         rr.extra_response_data = 0;
1472         rr.uri = 0;
1473         rr.message = 0;
1474         rr.details = 0;
1475
1476         *http_code = 200;
1477         if (rr.operation == 0)
1478         {
1479             yaz_add_sru_update_diagnostic(
1480                 assoc->encode, &srw_res->diagnostics,
1481                 &srw_res->num_diagnostics,
1482                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1483                 "action" );
1484             return;
1485         }
1486         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1487         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1488         if (!strcmp( rr.operation, "delete"))
1489         {
1490             if (srw_req->record && !srw_req->record->recordSchema)
1491             {
1492                 rr.record_schema = odr_strdup(
1493                     assoc->encode,
1494                     srw_req->record->recordSchema);
1495             }
1496             if (srw_req->record)
1497             {
1498                 rr.record_data = odr_strdupn(
1499                     assoc->encode,
1500                     srw_req->record->recordData_buf,
1501                     srw_req->record->recordData_len );
1502             }
1503             if (extra && extra->extraRecordData_len)
1504             {
1505                 rr.extra_record_data = odr_strdupn(
1506                     assoc->encode,
1507                     extra->extraRecordData_buf,
1508                     extra->extraRecordData_len );
1509             }
1510             if (srw_req->recordId)
1511                 rr.record_id = srw_req->recordId;
1512             else if (extra && extra->recordIdentifier)
1513                 rr.record_id = extra->recordIdentifier;
1514         }
1515         else if (!strcmp(rr.operation, "replace"))
1516         {
1517             if (srw_req->recordId)
1518                 rr.record_id = srw_req->recordId;
1519             else if (extra && extra->recordIdentifier)
1520                 rr.record_id = extra->recordIdentifier;
1521             else
1522             {
1523                 yaz_add_sru_update_diagnostic(
1524                     assoc->encode, &srw_res->diagnostics,
1525                     &srw_res->num_diagnostics,
1526                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1527                     "recordIdentifier");
1528             }
1529             if (!srw_req->record)
1530             {
1531                 yaz_add_sru_update_diagnostic(
1532                     assoc->encode, &srw_res->diagnostics,
1533                     &srw_res->num_diagnostics,
1534                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1535                     "record");
1536             }
1537             else
1538             {
1539                 if (srw_req->record->recordSchema)
1540                     rr.record_schema = odr_strdup(
1541                         assoc->encode, srw_req->record->recordSchema);
1542                 if (srw_req->record->recordData_len )
1543                 {
1544                     rr.record_data = odr_strdupn(assoc->encode,
1545                                                  srw_req->record->recordData_buf,
1546                                                  srw_req->record->recordData_len );
1547                 }
1548                 else
1549                 {
1550                     yaz_add_sru_update_diagnostic(
1551                         assoc->encode, &srw_res->diagnostics,
1552                         &srw_res->num_diagnostics,
1553                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1554                         "recordData" );
1555                 }
1556             }
1557             if (extra && extra->extraRecordData_len)
1558             {
1559                 rr.extra_record_data = odr_strdupn(
1560                     assoc->encode,
1561                     extra->extraRecordData_buf,
1562                     extra->extraRecordData_len );
1563             }
1564         }
1565         else if (!strcmp(rr.operation, "insert"))
1566         {
1567             if (srw_req->recordId)
1568                 rr.record_id = srw_req->recordId;
1569             else if (extra)
1570                 rr.record_id = extra->recordIdentifier;
1571
1572             if (srw_req->record)
1573             {
1574                 if (srw_req->record->recordSchema)
1575                     rr.record_schema = odr_strdup(
1576                         assoc->encode, srw_req->record->recordSchema);
1577
1578                 if (srw_req->record->recordData_len)
1579                     rr.record_data = odr_strdupn(
1580                         assoc->encode,
1581                         srw_req->record->recordData_buf,
1582                         srw_req->record->recordData_len );
1583             }
1584             if (extra && extra->extraRecordData_len)
1585             {
1586                 rr.extra_record_data = odr_strdupn(
1587                     assoc->encode,
1588                     extra->extraRecordData_buf,
1589                     extra->extraRecordData_len );
1590             }
1591         }
1592         else
1593             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1594                                           &srw_res->num_diagnostics,
1595                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1596                                           rr.operation );
1597
1598         if (srw_req->record)
1599         {
1600             const char *pack_str =
1601                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1602             if (pack_str)
1603                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1604         }
1605
1606         if (srw_req->num_recordVersions)
1607         {
1608             rr.record_versions = srw_req->recordVersions;
1609             rr.num_versions = srw_req->num_recordVersions;
1610         }
1611         if (srw_req->extraRequestData_len)
1612         {
1613             rr.extra_request_data = odr_strdupn(assoc->encode,
1614                                                 srw_req->extraRequestData_buf,
1615                                                 srw_req->extraRequestData_len );
1616         }
1617         if (srw_res->num_diagnostics == 0)
1618         {
1619             if ( assoc->init->bend_srw_update)
1620                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1621             else
1622                 yaz_add_sru_update_diagnostic(
1623                     assoc->encode, &srw_res->diagnostics,
1624                     &srw_res->num_diagnostics,
1625                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1626                     "No Update backend handler");
1627         }
1628
1629         if (rr.uri)
1630             yaz_add_srw_diagnostic_uri(assoc->encode,
1631                                        &srw_res->diagnostics,
1632                                        &srw_res->num_diagnostics,
1633                                        rr.uri,
1634                                        rr.message,
1635                                        rr.details);
1636         srw_res->recordId = rr.record_id;
1637         srw_res->operationStatus = rr.operation_status;
1638         srw_res->recordVersions = rr.record_versions;
1639         srw_res->num_recordVersions = rr.num_versions;
1640         if (srw_res->extraResponseData_len)
1641         {
1642             srw_res->extraResponseData_buf = rr.extra_response_data;
1643             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1644         }
1645         if (srw_res->num_diagnostics == 0 && rr.record_data)
1646         {
1647             srw_res->record = yaz_srw_get_record(assoc->encode);
1648             srw_res->record->recordSchema = rr.record_schema;
1649             if (rr.record_packing)
1650             {
1651                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1652
1653                 if (pack == -1)
1654                 {
1655                     pack = Z_SRW_recordPacking_string;
1656                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1657                             rr.record_packing);
1658                 }
1659                 srw_res->record->recordPacking = pack;
1660             }
1661             srw_res->record->recordData_buf = rr.record_data;
1662             srw_res->record->recordData_len = strlen(rr.record_data);
1663             if (rr.extra_record_data)
1664             {
1665                 Z_SRW_extra_record *ex =
1666                     yaz_srw_get_extra_record(assoc->encode);
1667                 srw_res->extra_record = ex;
1668                 ex->extraRecordData_buf = rr.extra_record_data;
1669                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1670             }
1671         }
1672     }
1673 }
1674
1675 /* check if path is OK (1); BAD (0) */
1676 static int check_path(const char *path)
1677 {
1678     if (*path != '/')
1679         return 0;
1680     if (strstr(path, ".."))
1681         return 0;
1682     return 1;
1683 }
1684
1685 static char *read_file(const char *fname, ODR o, int *sz)
1686 {
1687     char *buf;
1688     FILE *inf = fopen(fname, "rb");
1689     if (!inf)
1690         return 0;
1691
1692     fseek(inf, 0L, SEEK_END);
1693     *sz = ftell(inf);
1694     rewind(inf);
1695     buf = odr_malloc(o, *sz);
1696     fread(buf, 1, *sz, inf);
1697     fclose(inf);
1698     return buf;
1699 }
1700
1701 static void process_http_request(association *assoc, request *req)
1702 {
1703     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1704     ODR o = assoc->encode;
1705     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1706     Z_SRW_PDU *sr = 0;
1707     Z_SOAP *soap_package = 0;
1708     Z_GDU *p = 0;
1709     char *charset = 0;
1710     Z_HTTP_Response *hres = 0;
1711     int keepalive = 1;
1712     const char *stylesheet = 0; /* for now .. set later */
1713     Z_SRW_diagnostic *diagnostic = 0;
1714     int num_diagnostic = 0;
1715     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1716
1717     if (!control_association(assoc, host, 0))
1718     {
1719         p = z_get_HTTP_Response(o, 404);
1720         r = 1;
1721     }
1722     if (r == 2 && assoc->server && assoc->server->docpath
1723         && hreq->path[0] == '/'
1724         &&
1725         /* check if path is a proper prefix of documentroot */
1726         strncmp(hreq->path+1, assoc->server->docpath,
1727                 strlen(assoc->server->docpath))
1728         == 0)
1729     {
1730         if (!check_path(hreq->path))
1731         {
1732             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1733             p = z_get_HTTP_Response(o, 404);
1734         }
1735         else
1736         {
1737             int content_size = 0;
1738             char *content_buf = read_file(hreq->path+1, o, &content_size);
1739             if (!content_buf)
1740             {
1741                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1742                 p = z_get_HTTP_Response(o, 404);
1743             }
1744             else
1745             {
1746                 const char *ctype = 0;
1747                 yaz_mime_types types = yaz_mime_types_create();
1748
1749                 yaz_mime_types_add(types, "xsl", "application/xml");
1750                 yaz_mime_types_add(types, "xml", "application/xml");
1751                 yaz_mime_types_add(types, "css", "text/css");
1752                 yaz_mime_types_add(types, "html", "text/html");
1753                 yaz_mime_types_add(types, "htm", "text/html");
1754                 yaz_mime_types_add(types, "txt", "text/plain");
1755                 yaz_mime_types_add(types, "js", "application/x-javascript");
1756
1757                 yaz_mime_types_add(types, "gif", "image/gif");
1758                 yaz_mime_types_add(types, "png", "image/png");
1759                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1760                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1761
1762                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1763                 if (!ctype)
1764                 {
1765                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1766                     p = z_get_HTTP_Response(o, 404);
1767                 }
1768                 else
1769                 {
1770                     p = z_get_HTTP_Response(o, 200);
1771                     hres = p->u.HTTP_Response;
1772                     hres->content_buf = content_buf;
1773                     hres->content_len = content_size;
1774                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1775                 }
1776                 yaz_mime_types_destroy(types);
1777             }
1778         }
1779         r = 1;
1780     }
1781
1782     if (r == 2)
1783     {
1784         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1785         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1786     }
1787     if (r == 2)  /* not taken */
1788     {
1789         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1790                            &diagnostic, &num_diagnostic);
1791         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1792     }
1793     if (r == 0)  /* decode SRW/SRU OK .. */
1794     {
1795         int http_code = 200;
1796         if (sr->which == Z_SRW_searchRetrieve_request)
1797         {
1798             Z_SRW_PDU *res =
1799                 yaz_srw_get(assoc->encode, Z_SRW_searchRetrieve_response);
1800
1801             stylesheet = sr->u.request->stylesheet;
1802             if (num_diagnostic)
1803             {
1804                 res->u.response->diagnostics = diagnostic;
1805                 res->u.response->num_diagnostics = num_diagnostic;
1806             }
1807             else
1808             {
1809                 srw_bend_search(assoc, req, sr, res->u.response,
1810                                 &http_code);
1811             }
1812             if (http_code == 200)
1813                 soap_package->u.generic->p = res;
1814         }
1815         else if (sr->which == Z_SRW_explain_request)
1816         {
1817             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
1818             stylesheet = sr->u.explain_request->stylesheet;
1819             if (num_diagnostic)
1820             {
1821                 res->u.explain_response->diagnostics = diagnostic;
1822                 res->u.explain_response->num_diagnostics = num_diagnostic;
1823             }
1824             srw_bend_explain(assoc, req, sr,
1825                              res->u.explain_response, &http_code);
1826             if (http_code == 200)
1827                 soap_package->u.generic->p = res;
1828         }
1829         else if (sr->which == Z_SRW_scan_request)
1830         {
1831             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_scan_response);
1832             stylesheet = sr->u.scan_request->stylesheet;
1833             if (num_diagnostic)
1834             {
1835                 res->u.scan_response->diagnostics = diagnostic;
1836                 res->u.scan_response->num_diagnostics = num_diagnostic;
1837             }
1838             srw_bend_scan(assoc, req, sr,
1839                           res->u.scan_response, &http_code);
1840             if (http_code == 200)
1841                 soap_package->u.generic->p = res;
1842         }
1843         else if (sr->which == Z_SRW_update_request)
1844         {
1845             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_update_response);
1846             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1847             if (num_diagnostic)
1848             {
1849                 res->u.update_response->diagnostics = diagnostic;
1850                 res->u.update_response->num_diagnostics = num_diagnostic;
1851             }
1852             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1853             srw_bend_update(assoc, req, sr,
1854                             res->u.update_response, &http_code);
1855             if (http_code == 200)
1856                 soap_package->u.generic->p = res;
1857         }
1858         else
1859         {
1860             yaz_log(log_request, "SOAP ERROR");
1861             /* FIXME - what error, what query */
1862             http_code = 500;
1863             z_soap_error(assoc->encode, soap_package,
1864                          "SOAP-ENV:Client", "Bad method", 0);
1865         }
1866         if (http_code == 200 || http_code == 500)
1867         {
1868             static Z_SOAP_Handler soap_handlers[4] = {
1869 #if YAZ_HAVE_XML2
1870                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1871                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1872                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1873 #endif
1874                 {0, 0, 0}
1875             };
1876             char ctype[60];
1877             int ret;
1878             p = z_get_HTTP_Response(o, 200);
1879             hres = p->u.HTTP_Response;
1880
1881             if (!stylesheet && assoc->server)
1882                 stylesheet = assoc->server->stylesheet;
1883
1884             /* empty stylesheet means NO stylesheet */
1885             if (stylesheet && *stylesheet == '\0')
1886                 stylesheet = 0;
1887
1888             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1889                                        &hres->content_buf, &hres->content_len,
1890                                        soap_handlers, charset, stylesheet);
1891             hres->code = http_code;
1892
1893             strcpy(ctype, "text/xml");
1894             if (charset)
1895             {
1896                 strcat(ctype, "; charset=");
1897                 strcat(ctype, charset);
1898             }
1899             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1900         }
1901         else
1902             p = z_get_HTTP_Response(o, http_code);
1903     }
1904
1905     if (p == 0)
1906         p = z_get_HTTP_Response(o, 500);
1907     hres = p->u.HTTP_Response;
1908     if (!strcmp(hreq->version, "1.0"))
1909     {
1910         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1911         if (v && !strcmp(v, "Keep-Alive"))
1912             keepalive = 1;
1913         else
1914             keepalive = 0;
1915         hres->version = "1.0";
1916     }
1917     else
1918     {
1919         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1920         if (v && !strcmp(v, "close"))
1921             keepalive = 0;
1922         else
1923             keepalive = 1;
1924         hres->version = "1.1";
1925     }
1926     if (!keepalive)
1927     {
1928         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1929         assoc->state = ASSOC_DEAD;
1930         assoc->cs_get_mask = 0;
1931     }
1932     else
1933     {
1934         int t;
1935         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1936
1937         if (alive && isdigit(*(const unsigned char *) alive))
1938             t = atoi(alive);
1939         else
1940             t = 15;
1941         if (t < 0 || t > 3600)
1942             t = 3600;
1943         iochan_settimeout(assoc->client_chan,t);
1944         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1945     }
1946     process_gdu_response(assoc, req, p);
1947 }
1948
1949 static void process_gdu_request(association *assoc, request *req)
1950 {
1951     if (req->gdu_request->which == Z_GDU_Z3950)
1952     {
1953         char *msg = 0;
1954         req->apdu_request = req->gdu_request->u.z3950;
1955         if (process_z_request(assoc, req, &msg) < 0)
1956             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1957     }
1958     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1959         process_http_request(assoc, req);
1960     else
1961     {
1962         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1963     }
1964 }
1965
1966 /*
1967  * Initiate request processing.
1968  */
1969 static int process_z_request(association *assoc, request *req, char **msg)
1970 {
1971     int fd = -1;
1972     Z_APDU *res;
1973     int retval;
1974
1975     *msg = "Unknown Error";
1976     assert(req && req->state == REQUEST_IDLE);
1977     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1978     {
1979         *msg = "Missing InitRequest";
1980         return -1;
1981     }
1982     switch (req->apdu_request->which)
1983     {
1984     case Z_APDU_initRequest:
1985         res = process_initRequest(assoc, req); break;
1986     case Z_APDU_searchRequest:
1987         res = process_searchRequest(assoc, req, &fd); break;
1988     case Z_APDU_presentRequest:
1989         res = process_presentRequest(assoc, req, &fd); break;
1990     case Z_APDU_scanRequest:
1991         if (assoc->init->bend_scan)
1992             res = process_scanRequest(assoc, req, &fd);
1993         else
1994         {
1995             *msg = "Cannot handle Scan APDU";
1996             return -1;
1997         }
1998         break;
1999     case Z_APDU_extendedServicesRequest:
2000         if (assoc->init->bend_esrequest)
2001             res = process_ESRequest(assoc, req, &fd);
2002         else
2003         {
2004             *msg = "Cannot handle Extended Services APDU";
2005             return -1;
2006         }
2007         break;
2008     case Z_APDU_sortRequest:
2009         if (assoc->init->bend_sort)
2010             res = process_sortRequest(assoc, req, &fd);
2011         else
2012         {
2013             *msg = "Cannot handle Sort APDU";
2014             return -1;
2015         }
2016         break;
2017     case Z_APDU_close:
2018         process_close(assoc, req);
2019         return 0;
2020     case Z_APDU_deleteResultSetRequest:
2021         if (assoc->init->bend_delete)
2022             res = process_deleteRequest(assoc, req, &fd);
2023         else
2024         {
2025             *msg = "Cannot handle Delete APDU";
2026             return -1;
2027         }
2028         break;
2029     case Z_APDU_segmentRequest:
2030         if (assoc->init->bend_segment)
2031         {
2032             res = process_segmentRequest (assoc, req);
2033         }
2034         else
2035         {
2036             *msg = "Cannot handle Segment APDU";
2037             return -1;
2038         }
2039         break;
2040     case Z_APDU_triggerResourceControlRequest:
2041         return 0;
2042     default:
2043         *msg = "Bad APDU received";
2044         return -1;
2045     }
2046     if (res)
2047     {
2048         yaz_log(YLOG_DEBUG, "  result immediately available");
2049         retval = process_z_response(assoc, req, res);
2050     }
2051     else if (fd < 0)
2052     {
2053         yaz_log(YLOG_DEBUG, "  result unavailble");
2054         retval = 0;
2055     }
2056     else /* no result yet - one will be provided later */
2057     {
2058         IOCHAN chan;
2059
2060         /* Set up an I/O handler for the fd supplied by the backend */
2061
2062         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2063         req->state = REQUEST_PENDING;
2064         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2065             abort();
2066         iochan_setdata(chan, assoc);
2067         retval = 0;
2068     }
2069     return retval;
2070 }
2071
2072 /*
2073  * Handle message from the backend.
2074  */
2075 void backend_response(IOCHAN i, int event)
2076 {
2077     association *assoc = (association *)iochan_getdata(i);
2078     request *req = request_head(&assoc->incoming);
2079     Z_APDU *res;
2080     int fd;
2081
2082     yaz_log(YLOG_DEBUG, "backend_response");
2083     assert(assoc && req && req->state != REQUEST_IDLE);
2084     /* determine what it is we're waiting for */
2085     switch (req->apdu_request->which)
2086     {
2087         case Z_APDU_searchRequest:
2088             res = response_searchRequest(assoc, req, 0, &fd); break;
2089 #if 0
2090         case Z_APDU_presentRequest:
2091             res = response_presentRequest(assoc, req, 0, &fd); break;
2092         case Z_APDU_scanRequest:
2093             res = response_scanRequest(assoc, req, 0, &fd); break;
2094 #endif
2095         default:
2096             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2097             abort();
2098     }
2099     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2100     {
2101         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2102         do_close(assoc, Z_Close_systemProblem, 0);
2103         iochan_destroy(i);
2104         return;
2105     }
2106     else if (!res) /* no result yet - try again later */
2107     {
2108         yaz_log(YLOG_DEBUG, "   no result yet");
2109         iochan_setfd(i, fd); /* in case fd has changed */
2110     }
2111 }
2112
2113 /*
2114  * Encode response, and transfer the request structure to the outgoing queue.
2115  */
2116 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2117 {
2118     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2119
2120     if (assoc->print)
2121     {
2122         if (!z_GDU(assoc->print, &res, 0, 0))
2123             yaz_log(YLOG_WARN, "ODR print error: %s",
2124                 odr_errmsg(odr_geterror(assoc->print)));
2125         odr_reset(assoc->print);
2126     }
2127     if (!z_GDU(assoc->encode, &res, 0, 0))
2128     {
2129         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2130                 odr_errmsg(odr_geterror(assoc->decode)),
2131                 odr_getelement(assoc->decode));
2132         return -1;
2133     }
2134     req->response = odr_getbuf(assoc->encode, &req->len_response,
2135         &req->size_response);
2136     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2137     odr_reset(assoc->encode);
2138     req->state = REQUEST_IDLE;
2139     request_enq(&assoc->outgoing, req);
2140     /* turn the work over to the ir_session handler */
2141     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2142     assoc->cs_put_mask = EVENT_OUTPUT;
2143     /* Is there more work to be done? give that to the input handler too */
2144     for (;;)
2145     {
2146         req = request_head(&assoc->incoming);
2147         if (req && req->state == REQUEST_IDLE)
2148         {
2149             request_deq(&assoc->incoming);
2150             process_gdu_request(assoc, req);
2151         }
2152         else
2153             break;
2154     }
2155     return 0;
2156 }
2157
2158 /*
2159  * Encode response, and transfer the request structure to the outgoing queue.
2160  */
2161 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2162 {
2163     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2164     gres->which = Z_GDU_Z3950;
2165     gres->u.z3950 = res;
2166
2167     return process_gdu_response(assoc, req, gres);
2168 }
2169
2170 static char *get_vhost(Z_OtherInformation *otherInfo)
2171 {
2172     return yaz_oi_get_string_oidval(&otherInfo, VAL_PROXY, 1, 0);
2173 }
2174
2175 /*
2176  * Handle init request.
2177  * At the moment, we don't check the options
2178  * anywhere else in the code - we just try not to do anything that would
2179  * break a naive client. We'll toss 'em into the association block when
2180  * we need them there.
2181  */
2182 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2183 {
2184     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2185     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2186     Z_InitResponse *resp = apdu->u.initResponse;
2187     bend_initresult *binitres;
2188     char *version;
2189     char options[140];
2190     statserv_options_block *cb = 0;  /* by default no control for backend */
2191
2192     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2193         cb = statserv_getcontrol();  /* got control block for backend */
2194
2195     if (cb && assoc->backend)
2196         (*cb->bend_close)(assoc->backend);
2197
2198     yaz_log(log_requestdetail, "Got initRequest");
2199     if (req->implementationId)
2200         yaz_log(log_requestdetail, "Id:        %s",
2201                 req->implementationId);
2202     if (req->implementationName)
2203         yaz_log(log_requestdetail, "Name:      %s",
2204                 req->implementationName);
2205     if (req->implementationVersion)
2206         yaz_log(log_requestdetail, "Version:   %s",
2207                 req->implementationVersion);
2208
2209     assoc_init_reset(assoc);
2210
2211     assoc->init->auth = req->idAuthentication;
2212     assoc->init->referenceId = req->referenceId;
2213
2214     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2215     {
2216         Z_CharSetandLanguageNegotiation *negotiation =
2217             yaz_get_charneg_record (req->otherInfo);
2218         if (negotiation &&
2219             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2220             assoc->init->charneg_request = negotiation;
2221     }
2222
2223     assoc->backend = 0;
2224     if (cb)
2225     {
2226         if (req->implementationVersion)
2227             yaz_log(log_requestdetail, "Config:    %s",
2228                     cb->configname);
2229
2230         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2231
2232         /* we have a backend control block, so call that init function */
2233         if (!(binitres = (*cb->bend_init)(assoc->init)))
2234         {
2235             yaz_log(YLOG_WARN, "Bad response from backend.");
2236             return 0;
2237         }
2238         assoc->backend = binitres->handle;
2239     }
2240     else
2241     {
2242         /* no backend. return error */
2243         binitres = odr_malloc(assoc->encode, sizeof(*binitres));
2244         binitres->errstring = 0;
2245         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2246         iochan_settimeout(assoc->client_chan, 10);
2247     }
2248     if ((assoc->init->bend_sort))
2249         yaz_log (YLOG_DEBUG, "Sort handler installed");
2250     if ((assoc->init->bend_search))
2251         yaz_log (YLOG_DEBUG, "Search handler installed");
2252     if ((assoc->init->bend_present))
2253         yaz_log (YLOG_DEBUG, "Present handler installed");
2254     if ((assoc->init->bend_esrequest))
2255         yaz_log (YLOG_DEBUG, "ESRequest handler installed");
2256     if ((assoc->init->bend_delete))
2257         yaz_log (YLOG_DEBUG, "Delete handler installed");
2258     if ((assoc->init->bend_scan))
2259         yaz_log (YLOG_DEBUG, "Scan handler installed");
2260     if ((assoc->init->bend_segment))
2261         yaz_log (YLOG_DEBUG, "Segment handler installed");
2262
2263     resp->referenceId = req->referenceId;
2264     *options = '\0';
2265     /* let's tell the client what we can do */
2266     if (ODR_MASK_GET(req->options, Z_Options_search))
2267     {
2268         ODR_MASK_SET(resp->options, Z_Options_search);
2269         strcat(options, "srch");
2270     }
2271     if (ODR_MASK_GET(req->options, Z_Options_present))
2272     {
2273         ODR_MASK_SET(resp->options, Z_Options_present);
2274         strcat(options, " prst");
2275     }
2276     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2277         assoc->init->bend_delete)
2278     {
2279         ODR_MASK_SET(resp->options, Z_Options_delSet);
2280         strcat(options, " del");
2281     }
2282     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2283         assoc->init->bend_esrequest)
2284     {
2285         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2286         strcat (options, " extendedServices");
2287     }
2288     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2289     {
2290         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2291         strcat(options, " namedresults");
2292     }
2293     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2294     {
2295         ODR_MASK_SET(resp->options, Z_Options_scan);
2296         strcat(options, " scan");
2297     }
2298     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2299     {
2300         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2301         strcat(options, " concurrop");
2302     }
2303     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2304     {
2305         ODR_MASK_SET(resp->options, Z_Options_sort);
2306         strcat(options, " sort");
2307     }
2308
2309     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
2310         && assoc->init->charneg_response)
2311     {
2312         Z_OtherInformation **p;
2313         Z_OtherInformationUnit *p0;
2314
2315         yaz_oi_APDU(apdu, &p);
2316
2317         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
2318             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2319
2320             p0->which = Z_OtherInfo_externallyDefinedInfo;
2321             p0->information.externallyDefinedInfo =
2322                 assoc->init->charneg_response;
2323         }
2324         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2325         strcat(options, " negotiation");
2326     }
2327
2328     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2329         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2330
2331     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2332     {
2333         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2334         assoc->version = 1; /* 1 & 2 are equivalent */
2335     }
2336     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2337     {
2338         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2339         assoc->version = 2;
2340     }
2341     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2342     {
2343         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2344         assoc->version = 3;
2345     }
2346
2347     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2348
2349     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2350         assoc->maximumRecordSize = *req->maximumRecordSize;
2351
2352     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2353         assoc->preferredMessageSize = *req->preferredMessageSize;
2354
2355     resp->preferredMessageSize = &assoc->preferredMessageSize;
2356     resp->maximumRecordSize = &assoc->maximumRecordSize;
2357
2358     resp->implementationId = odr_prepend(assoc->encode,
2359                 assoc->init->implementation_id,
2360                 resp->implementationId);
2361
2362     resp->implementationName = odr_prepend(assoc->encode,
2363                 assoc->init->implementation_name,
2364                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2365
2366     version = odr_strdup(assoc->encode, "$Revision: 1.110 $");
2367     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2368         version[strlen(version)-2] = '\0';
2369     resp->implementationVersion = odr_prepend(assoc->encode,
2370                 assoc->init->implementation_version,
2371                 odr_prepend(assoc->encode, &version[11],
2372                             resp->implementationVersion));
2373
2374     if (binitres->errcode)
2375     {
2376         assoc->state = ASSOC_DEAD;
2377         resp->userInformationField =
2378             init_diagnostics(assoc->encode, binitres->errcode,
2379                              binitres->errstring);
2380         *resp->result = 0;
2381     }
2382     if (log_request)
2383     {
2384         if (!req->idAuthentication)
2385             yaz_log(log_request, "Auth none");
2386         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2387         {
2388             const char *open = req->idAuthentication->u.open;
2389             const char *slash = strchr(open, '/');
2390             int len;
2391             if (slash)
2392                 len = slash - open;
2393             else
2394                 len = strlen(open);
2395                 yaz_log(log_request, "Auth open %.*s", len, open);
2396         }
2397         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2398         {
2399             const char *user = req->idAuthentication->u.idPass->userId;
2400             const char *group = req->idAuthentication->u.idPass->groupId;
2401             yaz_log(log_request, "Auth idPass %s %s",
2402                     user ? user : "-", group ? group : "-");
2403         }
2404         else if (req->idAuthentication->which
2405                  == Z_IdAuthentication_anonymous)
2406         {
2407             yaz_log(log_request, "Auth anonymous");
2408         }
2409         else
2410         {
2411             yaz_log(log_request, "Auth other");
2412         }
2413     }
2414     if (log_request)
2415     {
2416         WRBUF wr = wrbuf_alloc();
2417         wrbuf_printf(wr, "Init ");
2418         if (binitres->errcode)
2419             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2420         else
2421             wrbuf_printf(wr, "OK -");
2422         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2423                      (req->implementationId ? req->implementationId :"-"),
2424                      (req->implementationName ?
2425                       req->implementationName : "-"),
2426                      (req->implementationVersion ?
2427                       req->implementationVersion : "-")
2428             );
2429         yaz_log(log_request, "%s", wrbuf_buf(wr));
2430         wrbuf_free(wr, 1);
2431     }
2432     return apdu;
2433 }
2434
2435 /*
2436  * Set the specified `errcode' and `errstring' into a UserInfo-1
2437  * external to be returned to the client in accordance with Z35.90
2438  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2439  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2440  */
2441 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2442 {
2443     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2444         addinfo ? " -- " : "", addinfo ? addinfo : "");
2445     return zget_init_diagnostics(odr, error, addinfo);
2446 }
2447
2448 /*
2449  * nonsurrogate diagnostic record.
2450  */
2451 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2452 {
2453     Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec));
2454
2455     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2456             addinfo ? " -- " : "", addinfo ? addinfo : "");
2457
2458     rec->which = Z_Records_NSD;
2459     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2460                                                            error, addinfo);
2461     return rec;
2462 }
2463
2464 /*
2465  * surrogate diagnostic.
2466  */
2467 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2468                                           const char *dbname,
2469                                           int error, const char *addinfo)
2470 {
2471     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2472             addinfo ? " -- " : "", addinfo ? addinfo : "");
2473     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2474 }
2475
2476 static Z_Records *pack_records(association *a, char *setname, int start,
2477                                int *num, Z_RecordComposition *comp,
2478                                int *next, int *pres, oid_value format,
2479                                Z_ReferenceId *referenceId,
2480                                int *oid, int *errcode)
2481 {
2482     int recno, total_length = 0, toget = *num, dumped_records = 0;
2483     Z_Records *records =
2484         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
2485     Z_NamePlusRecordList *reclist =
2486         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
2487     Z_NamePlusRecord **list =
2488         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
2489
2490     records->which = Z_Records_DBOSD;
2491     records->u.databaseOrSurDiagnostics = reclist;
2492     reclist->num_records = 0;
2493     reclist->records = list;
2494     *pres = Z_PresentStatus_success;
2495     *num = 0;
2496     *next = 0;
2497
2498     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2499     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2500         a->maximumRecordSize);
2501     for (recno = start; reclist->num_records < toget; recno++)
2502     {
2503         bend_fetch_rr freq;
2504         Z_NamePlusRecord *thisrec;
2505         int this_length = 0;
2506         /*
2507          * we get the number of bytes allocated on the stream before any
2508          * allocation done by the backend - this should give us a reasonable
2509          * idea of the total size of the data so far.
2510          */
2511         total_length = odr_total(a->encode) - dumped_records;
2512         freq.errcode = 0;
2513         freq.errstring = 0;
2514         freq.basename = 0;
2515         freq.len = 0;
2516         freq.record = 0;
2517         freq.last_in_set = 0;
2518         freq.setname = setname;
2519         freq.surrogate_flag = 0;
2520         freq.number = recno;
2521         freq.comp = comp;
2522         freq.request_format = format;
2523         freq.request_format_raw = oid;
2524         freq.output_format = format;
2525         freq.output_format_raw = 0;
2526         freq.stream = a->encode;
2527         freq.print = a->print;
2528         freq.referenceId = referenceId;
2529         freq.schema = 0;
2530
2531         retrieve_fetch(a, &freq);
2532
2533         *next = freq.last_in_set ? 0 : recno + 1;
2534
2535         /* backend should be able to signal whether error is system-wide
2536            or only pertaining to current record */
2537         if (freq.errcode)
2538         {
2539             if (!freq.surrogate_flag)
2540             {
2541                 char s[20];
2542                 *pres = Z_PresentStatus_failure;
2543                 /* for 'present request out of range',
2544                    set addinfo to record position if not set */
2545                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2546                                 freq.errstring == 0)
2547                 {
2548                     sprintf (s, "%d", recno);
2549                     freq.errstring = s;
2550                 }
2551                 if (errcode)
2552                     *errcode = freq.errcode;
2553                 return diagrec(a, freq.errcode, freq.errstring);
2554             }
2555             reclist->records[reclist->num_records] =
2556                 surrogatediagrec(a, freq.basename, freq.errcode,
2557                                  freq.errstring);
2558             reclist->num_records++;
2559             continue;
2560         }
2561         if (freq.record == 0)  /* no error and no record ? */
2562         {
2563             *next = 0;   /* signal end-of-set and stop */
2564             break;
2565         }
2566         if (freq.len >= 0)
2567             this_length = freq.len;
2568         else
2569             this_length = odr_total(a->encode) - total_length - dumped_records;
2570         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2571             this_length, total_length, dumped_records);
2572         if (a->preferredMessageSize > 0 &&
2573                 this_length + total_length > a->preferredMessageSize)
2574         {
2575             /* record is small enough, really */
2576             if (this_length <= a->preferredMessageSize && recno > start)
2577             {
2578                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2579                 *pres = Z_PresentStatus_partial_2;
2580                 break;
2581             }
2582             /* record can only be fetched by itself */
2583             if (this_length < a->maximumRecordSize)
2584             {
2585                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2586                 if (toget > 1)
2587                 {
2588                     yaz_log(YLOG_DEBUG, "  Dropped it");
2589                     reclist->records[reclist->num_records] =
2590                          surrogatediagrec(a, freq.basename, 16, 0);
2591                     reclist->num_records++;
2592                     dumped_records += this_length;
2593                     continue;
2594                 }
2595             }
2596             else /* too big entirely */
2597             {
2598                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2599                         this_length, a->maximumRecordSize);
2600                 reclist->records[reclist->num_records] =
2601                     surrogatediagrec(a, freq.basename, 17, 0);
2602                 reclist->num_records++;
2603                 dumped_records += this_length;
2604                 continue;
2605             }
2606         }
2607
2608         if (!(thisrec = (Z_NamePlusRecord *)
2609               odr_malloc(a->encode, sizeof(*thisrec))))
2610             return 0;
2611         if (freq.basename)
2612             thisrec->databaseName = odr_strdup(a->encode, freq.basename);
2613         else
2614             thisrec->databaseName = 0;
2615         thisrec->which = Z_NamePlusRecord_databaseRecord;
2616
2617         if (freq.output_format_raw)
2618         {
2619             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
2620             freq.output_format = ident->value;
2621         }
2622         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
2623                                                  freq.record, freq.len);
2624         if (!thisrec->u.databaseRecord)
2625             return 0;
2626         reclist->records[reclist->num_records] = thisrec;
2627         reclist->num_records++;
2628     }
2629     *num = reclist->num_records;
2630     return records;
2631 }
2632
2633 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2634     int *fd)
2635 {
2636     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2637     bend_search_rr *bsrr =
2638         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
2639
2640     yaz_log(log_requestdetail, "Got SearchRequest.");
2641     bsrr->fd = fd;
2642     bsrr->request = reqb;
2643     bsrr->association = assoc;
2644     bsrr->referenceId = req->referenceId;
2645     save_referenceId (reqb, bsrr->referenceId);
2646     bsrr->srw_sortKeys = 0;
2647     bsrr->srw_setname = 0;
2648     bsrr->srw_setnameIdleTime = 0;
2649     bsrr->estimated_hit_count = 0;
2650     bsrr->partial_resultset = 0;
2651
2652     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2653     if (req->databaseNames)
2654     {
2655         int i;
2656         for (i = 0; i < req->num_databaseNames; i++)
2657             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2658     }
2659
2660     yaz_log_zquery_level(log_requestdetail,req->query);
2661
2662     if (assoc->init->bend_search)
2663     {
2664         bsrr->setname = req->resultSetName;
2665         bsrr->replace_set = *req->replaceIndicator;
2666         bsrr->num_bases = req->num_databaseNames;
2667         bsrr->basenames = req->databaseNames;
2668         bsrr->query = req->query;
2669         bsrr->stream = assoc->encode;
2670         nmem_transfer(bsrr->stream->mem, reqb->request_mem);
2671         bsrr->decode = assoc->decode;
2672         bsrr->print = assoc->print;
2673         bsrr->hits = 0;
2674         bsrr->errcode = 0;
2675         bsrr->errstring = NULL;
2676         bsrr->search_info = NULL;
2677
2678         if (assoc->server && assoc->server->cql_transform
2679             && req->query->which == Z_Query_type_104
2680             && req->query->u.type_104->which == Z_External_CQL)
2681         {
2682             /* have a CQL query and a CQL to PQF transform .. */
2683             int srw_errcode =
2684                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2685                         assoc->server->cql_transform, bsrr->query);
2686             if (srw_errcode)
2687                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2688         }
2689         if (!bsrr->errcode)
2690             (assoc->init->bend_search)(assoc->backend, bsrr);
2691         if (!bsrr->request)  /* backend not ready with the search response */
2692             return 0;  /* should not be used any more */
2693     }
2694     else
2695     {
2696         /* FIXME - make a diagnostic for it */
2697         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2698     }
2699     return response_searchRequest(assoc, reqb, bsrr, fd);
2700 }
2701
2702 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2703
2704 /*
2705  * Prepare a searchresponse based on the backend results. We probably want
2706  * to look at making the fetching of records nonblocking as well, but
2707  * so far, we'll keep things simple.
2708  * If bsrt is null, that means we're called in response to a communications
2709  * event, and we'll have to get the response for ourselves.
2710  */
2711 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2712     bend_search_rr *bsrt, int *fd)
2713 {
2714     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2715     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2716     Z_SearchResponse *resp = (Z_SearchResponse *)
2717         odr_malloc (assoc->encode, sizeof(*resp));
2718     int *nulint = odr_intdup (assoc->encode, 0);
2719     int *next = odr_intdup(assoc->encode, 0);
2720     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2721     int returnedrecs = 0;
2722
2723     apdu->which = Z_APDU_searchResponse;
2724     apdu->u.searchResponse = resp;
2725     resp->referenceId = req->referenceId;
2726     resp->additionalSearchInfo = 0;
2727     resp->otherInfo = 0;
2728     *fd = -1;
2729     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2730     {
2731         yaz_log(YLOG_FATAL, "Bad result from backend");
2732         return 0;
2733     }
2734     else if (bsrt->errcode)
2735     {
2736         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2737         resp->resultCount = nulint;
2738         resp->numberOfRecordsReturned = nulint;
2739         resp->nextResultSetPosition = nulint;
2740         resp->searchStatus = nulint;
2741         resp->resultSetStatus = none;
2742         resp->presentStatus = 0;
2743     }
2744     else
2745     {
2746         bool_t *sr = odr_intdup(assoc->encode, 1);
2747         int *toget = odr_intdup(assoc->encode, 0);
2748         Z_RecordComposition comp, *compp = 0;
2749
2750         yaz_log (log_requestdetail, "resultCount: %d", bsrt->hits);
2751
2752         resp->records = 0;
2753         resp->resultCount = &bsrt->hits;
2754
2755         comp.which = Z_RecordComp_simple;
2756         /* how many records does the user agent want, then? */
2757         if (bsrt->hits <= *req->smallSetUpperBound)
2758         {
2759             *toget = bsrt->hits;
2760             if ((comp.u.simple = req->smallSetElementSetNames))
2761                 compp = &comp;
2762         }
2763         else if (bsrt->hits < *req->largeSetLowerBound)
2764         {
2765             *toget = *req->mediumSetPresentNumber;
2766             if (*toget > bsrt->hits)
2767                 *toget = bsrt->hits;
2768             if ((comp.u.simple = req->mediumSetElementSetNames))
2769                 compp = &comp;
2770         }
2771         else
2772             *toget = 0;
2773
2774         if (*toget && !resp->records)
2775         {
2776             oident *prefformat;
2777             oid_value form;
2778             int *presst = odr_intdup(assoc->encode, 0);
2779
2780             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2781                 form = VAL_NONE;
2782             else
2783                 form = prefformat->value;
2784
2785             /* Call bend_present if defined */
2786             if (assoc->init->bend_present)
2787             {
2788                 bend_present_rr *bprr = (bend_present_rr *)
2789                     nmem_malloc (reqb->request_mem, sizeof(*bprr));
2790                 bprr->setname = req->resultSetName;
2791                 bprr->start = 1;
2792                 bprr->number = *toget;
2793                 bprr->format = form;
2794                 bprr->comp = compp;
2795                 bprr->referenceId = req->referenceId;
2796                 bprr->stream = assoc->encode;
2797                 bprr->print = assoc->print;
2798                 bprr->request = reqb;
2799                 bprr->association = assoc;
2800                 bprr->errcode = 0;
2801                 bprr->errstring = NULL;
2802                 (*assoc->init->bend_present)(assoc->backend, bprr);
2803
2804                 if (!bprr->request)
2805                     return 0;
2806                 if (bprr->errcode)
2807                 {
2808                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2809                     *resp->presentStatus = Z_PresentStatus_failure;
2810                 }
2811             }
2812
2813             if (!resp->records)
2814                 resp->records = pack_records(assoc, req->resultSetName, 1,
2815                                              toget, compp, next, presst, form, req->referenceId,
2816                                              req->preferredRecordSyntax, NULL);
2817             if (!resp->records)
2818                 return 0;
2819             resp->numberOfRecordsReturned = toget;
2820             returnedrecs = *toget;
2821             resp->presentStatus = presst;
2822         }
2823         else
2824         {
2825             if (*resp->resultCount)
2826                 *next = 1;
2827             resp->numberOfRecordsReturned = nulint;
2828             resp->presentStatus = 0;
2829         }
2830         resp->nextResultSetPosition = next;
2831         resp->searchStatus = sr;
2832         resp->resultSetStatus = 0;
2833         if (bsrt->estimated_hit_count)
2834         {
2835             resp->resultSetStatus = odr_intdup(assoc->encode,
2836                                                Z_SearchResponse_estimate);
2837         }
2838         else if (bsrt->partial_resultset)
2839         {
2840             resp->resultSetStatus = odr_intdup(assoc->encode,
2841                                                Z_SearchResponse_subset);
2842         }
2843     }
2844     resp->additionalSearchInfo = bsrt->search_info;
2845
2846     if (log_request)
2847     {
2848         int i;
2849         WRBUF wr = wrbuf_alloc();
2850
2851         for (i = 0 ; i < req->num_databaseNames; i++){
2852             if (i)
2853                 wrbuf_printf(wr, "+");
2854             wrbuf_printf(wr, req->databaseNames[i]);
2855         }
2856         wrbuf_printf(wr, " ");
2857
2858         if (bsrt->errcode)
2859             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2860         else
2861             wrbuf_printf(wr, "OK %d", bsrt->hits);
2862         wrbuf_printf(wr, " %s 1+%d ",
2863                      req->resultSetName, returnedrecs);
2864         yaz_query_to_wrbuf(wr, req->query);
2865
2866         yaz_log(log_request, "Search %s", wrbuf_buf(wr));
2867         wrbuf_free(wr, 1);
2868     }
2869     return apdu;
2870 }
2871
2872 /*
2873  * Maybe we got a little over-friendly when we designed bend_fetch to
2874  * get only one record at a time. Some backends can optimise multiple-record
2875  * fetches, and at any rate, there is some overhead involved in
2876  * all that selecting and hopping around. Problem is, of course, that the
2877  * frontend can't know ahead of time how many records it'll need to
2878  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2879  * is downright lousy as a bulk data transfer protocol.
2880  *
2881  * To start with, we'll do the fetching of records from the backend
2882  * in one operation: To save some trips in and out of the event-handler,
2883  * and to simplify the interface to pack_records. At any rate, asynch
2884  * operation is more fun in operations that have an unpredictable execution
2885  * speed - which is normally more true for search than for present.
2886  */
2887 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2888                                       int *fd)
2889 {
2890     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2891     oident *prefformat;
2892     oid_value form;
2893     Z_APDU *apdu;
2894     Z_PresentResponse *resp;
2895     int *next;
2896     int *num;
2897     int errcode = 0;
2898     const char *errstring = 0;
2899
2900     yaz_log(log_requestdetail, "Got PresentRequest.");
2901
2902     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2903         form = VAL_NONE;
2904     else
2905         form = prefformat->value;
2906     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2907     resp->records = 0;
2908     resp->presentStatus = odr_intdup(assoc->encode, 0);
2909     if (assoc->init->bend_present)
2910     {
2911         bend_present_rr *bprr = (bend_present_rr *)
2912             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2913         bprr->setname = req->resultSetId;
2914         bprr->start = *req->resultSetStartPoint;
2915         bprr->number = *req->numberOfRecordsRequested;
2916         bprr->format = form;
2917         bprr->comp = req->recordComposition;
2918         bprr->referenceId = req->referenceId;
2919         bprr->stream = assoc->encode;
2920         bprr->print = assoc->print;
2921         bprr->request = reqb;
2922         bprr->association = assoc;
2923         bprr->errcode = 0;
2924         bprr->errstring = NULL;
2925         (*assoc->init->bend_present)(assoc->backend, bprr);
2926
2927         if (!bprr->request)
2928             return 0; /* should not happen */
2929         if (bprr->errcode)
2930         {
2931             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2932             *resp->presentStatus = Z_PresentStatus_failure;
2933             errcode = bprr->errcode;
2934             errstring = bprr->errstring;
2935         }
2936     }
2937     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2938     next = odr_intdup(assoc->encode, 0);
2939     num = odr_intdup(assoc->encode, 0);
2940
2941     apdu->which = Z_APDU_presentResponse;
2942     apdu->u.presentResponse = resp;
2943     resp->referenceId = req->referenceId;
2944     resp->otherInfo = 0;
2945
2946     if (!resp->records)
2947     {
2948         *num = *req->numberOfRecordsRequested;
2949         resp->records =
2950             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2951                          num, req->recordComposition, next,
2952                          resp->presentStatus,
2953                          form, req->referenceId, req->preferredRecordSyntax,
2954                          &errcode);
2955     }
2956     if (log_request)
2957     {
2958         WRBUF wr = wrbuf_alloc();
2959         wrbuf_printf(wr, "Present ");
2960
2961         if (*resp->presentStatus == Z_PresentStatus_failure)
2962             wrbuf_printf(wr, "ERROR %d ", errcode);
2963         else if (*resp->presentStatus == Z_PresentStatus_success)
2964             wrbuf_printf(wr, "OK -  ");
2965         else
2966             wrbuf_printf(wr, "Partial %d - ", *resp->presentStatus);
2967
2968         wrbuf_printf(wr, " %s %d+%d ",
2969                 req->resultSetId, *req->resultSetStartPoint,
2970                 *req->numberOfRecordsRequested);
2971         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2972         wrbuf_free(wr, 1);
2973     }
2974     if (!resp->records)
2975         return 0;
2976     resp->numberOfRecordsReturned = num;
2977     resp->nextResultSetPosition = next;
2978
2979     return apdu;
2980 }
2981
2982 /*
2983  * Scan was implemented rather in a hurry, and with support for only the basic
2984  * elements of the service in the backend API. Suggestions are welcome.
2985  */
2986 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2987 {
2988     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2989     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2990     Z_ScanResponse *res = (Z_ScanResponse *)
2991         odr_malloc (assoc->encode, sizeof(*res));
2992     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2993     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2994     Z_ListEntries *ents = (Z_ListEntries *)
2995         odr_malloc (assoc->encode, sizeof(*ents));
2996     Z_DiagRecs *diagrecs_p = NULL;
2997     oident *attset;
2998     bend_scan_rr *bsrr = (bend_scan_rr *)
2999         odr_malloc (assoc->encode, sizeof(*bsrr));
3000     struct scan_entry *save_entries;
3001
3002     yaz_log(log_requestdetail, "Got ScanRequest");
3003
3004     apdu->which = Z_APDU_scanResponse;
3005     apdu->u.scanResponse = res;
3006     res->referenceId = req->referenceId;
3007
3008     /* if step is absent, set it to 0 */
3009     res->stepSize = odr_intdup(assoc->encode, 0);
3010     if (req->stepSize)
3011         *res->stepSize = *req->stepSize;
3012
3013     res->scanStatus = scanStatus;
3014     res->numberOfEntriesReturned = numberOfEntriesReturned;
3015     res->positionOfTerm = 0;
3016     res->entries = ents;
3017     ents->num_entries = 0;
3018     ents->entries = NULL;
3019     ents->num_nonsurrogateDiagnostics = 0;
3020     ents->nonsurrogateDiagnostics = NULL;
3021     res->attributeSet = 0;
3022     res->otherInfo = 0;
3023
3024     if (req->databaseNames)
3025     {
3026         int i;
3027         for (i = 0; i < req->num_databaseNames; i++)
3028             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
3029     }
3030     bsrr->scanClause = 0;
3031     bsrr->errcode = 0;
3032     bsrr->errstring = 0;
3033     bsrr->num_bases = req->num_databaseNames;
3034     bsrr->basenames = req->databaseNames;
3035     bsrr->num_entries = *req->numberOfTermsRequested;
3036     bsrr->term = req->termListAndStartPoint;
3037     bsrr->referenceId = req->referenceId;
3038     bsrr->stream = assoc->encode;
3039     bsrr->print = assoc->print;
3040     bsrr->step_size = res->stepSize;
3041     bsrr->entries = 0;
3042     /* For YAZ 2.0 and earlier it was the backend handler that
3043        initialized entries (member display_term did not exist)
3044        YAZ 2.0 and later sets 'entries'  and initialize all members
3045        including 'display_term'. If YAZ 2.0 or later sees that
3046        entries was modified - we assume that it is an old handler and
3047        that 'display_term' is _not_ set.
3048     */
3049     if (bsrr->num_entries > 0)
3050     {
3051         int i;
3052         bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3053                                    bsrr->num_entries);
3054         for (i = 0; i<bsrr->num_entries; i++)
3055         {
3056             bsrr->entries[i].term = 0;
3057             bsrr->entries[i].occurrences = 0;
3058             bsrr->entries[i].errcode = 0;
3059             bsrr->entries[i].errstring = 0;
3060             bsrr->entries[i].display_term = 0;
3061         }
3062     }
3063     save_entries = bsrr->entries;  /* save it so we can compare later */
3064
3065     if (req->attributeSet &&
3066         (attset = oid_getentbyoid(req->attributeSet)) &&
3067         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
3068         bsrr->attributeset = attset->value;
3069     else
3070         bsrr->attributeset = VAL_NONE;
3071     log_scan_term_level (log_requestdetail, req->termListAndStartPoint,
3072             bsrr->attributeset);
3073     bsrr->term_position = req->preferredPositionInResponse ?
3074         *req->preferredPositionInResponse : 1;
3075
3076     ((int (*)(void *, bend_scan_rr *))
3077      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3078
3079     if (bsrr->errcode)
3080         diagrecs_p = zget_DiagRecs(assoc->encode,
3081                                    bsrr->errcode, bsrr->errstring);
3082     else
3083     {
3084         int i;
3085         Z_Entry **tab = (Z_Entry **)
3086             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
3087
3088         if (bsrr->status == BEND_SCAN_PARTIAL)
3089             *scanStatus = Z_Scan_partial_5;
3090         else
3091             *scanStatus = Z_Scan_success;
3092         ents->entries = tab;
3093         ents->num_entries = bsrr->num_entries;
3094         res->numberOfEntriesReturned = &ents->num_entries;
3095         res->positionOfTerm = &bsrr->term_position;
3096         for (i = 0; i < bsrr->num_entries; i++)
3097         {
3098             Z_Entry *e;
3099             Z_TermInfo *t;
3100             Odr_oct *o;
3101
3102             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3103             if (bsrr->entries[i].occurrences >= 0)
3104             {
3105                 e->which = Z_Entry_termInfo;
3106                 e->u.termInfo = t = (Z_TermInfo *)
3107                     odr_malloc(assoc->encode, sizeof(*t));
3108                 t->suggestedAttributes = 0;
3109                 t->displayTerm = 0;
3110                 if (save_entries == bsrr->entries &&
3111                     bsrr->entries[i].display_term)
3112                 {
3113                     /* the entries was _not_ set by the handler. So it's
3114                        safe to test for new member display_term. It is
3115                        NULL'ed by us.
3116                     */
3117                     t->displayTerm = odr_strdup(assoc->encode,
3118                                                 bsrr->entries[i].display_term);
3119                 }
3120                 t->alternativeTerm = 0;
3121                 t->byAttributes = 0;
3122                 t->otherTermInfo = 0;
3123                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3124                 t->term = (Z_Term *)
3125                     odr_malloc(assoc->encode, sizeof(*t->term));
3126                 t->term->which = Z_Term_general;
3127                 t->term->u.general = o =
3128                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3129                 o->buf = (unsigned char *)
3130                     odr_malloc(assoc->encode, o->len = o->size =
3131                                strlen(bsrr->entries[i].term));
3132                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3133                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3134                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3135             }
3136             else
3137             {
3138                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3139                                                   bsrr->entries[i].errcode,
3140                                                   bsrr->entries[i].errstring);
3141                 assert (drecs->num_diagRecs == 1);
3142                 e->which = Z_Entry_surrogateDiagnostic;
3143                 assert (drecs->diagRecs[0]);
3144                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3145             }
3146         }
3147     }
3148     if (diagrecs_p)
3149     {
3150         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3151         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3152     }
3153     if (log_request)
3154     {
3155         int i;
3156         WRBUF wr = wrbuf_alloc();
3157         wrbuf_printf(wr, "Scan ");
3158         for (i = 0 ; i < req->num_databaseNames; i++){
3159             if (i)
3160                 wrbuf_printf(wr, "+");
3161             wrbuf_printf(wr, req->databaseNames[i]);
3162         }
3163         wrbuf_printf(wr, " ");
3164
3165         if (bsrr->errcode){
3166             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3167             wrbuf_printf(wr, " ");
3168         }
3169         else
3170             wrbuf_printf(wr, "OK ");
3171         /* else if (*res->scanStatus == Z_Scan_success) */
3172         /*    wrbuf_printf(wr, "OK "); */
3173         /* else */
3174         /* wrbuf_printf(wr, "Partial "); */
3175
3176         if (*res->numberOfEntriesReturned)
3177             wrbuf_printf(wr, "%d - ", *res->numberOfEntriesReturned);
3178         else
3179             wrbuf_printf(wr, "0 - ");
3180
3181         wrbuf_printf(wr, "%d+%d+%d ",
3182                      (req->preferredPositionInResponse ?
3183                       *req->preferredPositionInResponse : 1),
3184                      *req->numberOfTermsRequested,
3185                      (res->stepSize ? *res->stepSize : 1));
3186
3187         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3188                           bsrr->attributeset);
3189         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3190         wrbuf_free(wr, 1);
3191     }
3192     return apdu;
3193 }
3194
3195 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3196     int *fd)
3197 {
3198     int i;
3199     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3200     Z_SortResponse *res = (Z_SortResponse *)
3201         odr_malloc (assoc->encode, sizeof(*res));
3202     bend_sort_rr *bsrr = (bend_sort_rr *)
3203         odr_malloc (assoc->encode, sizeof(*bsrr));
3204
3205     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3206
3207     yaz_log(log_requestdetail, "Got SortRequest.");
3208
3209     bsrr->num_input_setnames = req->num_inputResultSetNames;
3210     for (i=0;i<req->num_inputResultSetNames;i++)
3211         yaz_log(log_requestdetail, "Input resultset: '%s'",
3212                 req->inputResultSetNames[i]);
3213     bsrr->input_setnames = req->inputResultSetNames;
3214     bsrr->referenceId = req->referenceId;
3215     bsrr->output_setname = req->sortedResultSetName;
3216     yaz_log(log_requestdetail, "Output resultset: '%s'",
3217                 req->sortedResultSetName);
3218     bsrr->sort_sequence = req->sortSequence;
3219        /*FIXME - dump those sequences too */
3220     bsrr->stream = assoc->encode;
3221     bsrr->print = assoc->print;
3222
3223     bsrr->sort_status = Z_SortResponse_failure;
3224     bsrr->errcode = 0;
3225     bsrr->errstring = 0;
3226
3227     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3228
3229     res->referenceId = bsrr->referenceId;
3230     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3231     res->resultSetStatus = 0;
3232     if (bsrr->errcode)
3233     {
3234         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3235                                        bsrr->errcode, bsrr->errstring);
3236         res->diagnostics = dr->diagRecs;
3237         res->num_diagnostics = dr->num_diagRecs;
3238     }
3239     else
3240     {
3241         res->num_diagnostics = 0;
3242         res->diagnostics = 0;
3243     }
3244     res->resultCount = 0;
3245     res->otherInfo = 0;
3246
3247     apdu->which = Z_APDU_sortResponse;
3248     apdu->u.sortResponse = res;
3249     if (log_request)
3250     {
3251         WRBUF wr = wrbuf_alloc();
3252         wrbuf_printf(wr, "Sort ");
3253         if (bsrr->errcode)
3254             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3255         else
3256             wrbuf_printf(wr,  "OK -");
3257         wrbuf_printf(wr, " (");
3258         for (i = 0; i<req->num_inputResultSetNames; i++)
3259         {
3260             if (i)
3261                 wrbuf_printf(wr, "+");
3262             wrbuf_printf(wr, req->inputResultSetNames[i]);
3263         }
3264         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3265
3266         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3267         wrbuf_free(wr, 1);
3268     }
3269     return apdu;
3270 }
3271
3272 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3273     int *fd)
3274 {
3275     int i;
3276     Z_DeleteResultSetRequest *req =
3277         reqb->apdu_request->u.deleteResultSetRequest;
3278     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3279         odr_malloc (assoc->encode, sizeof(*res));
3280     bend_delete_rr *bdrr = (bend_delete_rr *)
3281         odr_malloc (assoc->encode, sizeof(*bdrr));
3282     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3283
3284     yaz_log(log_requestdetail, "Got DeleteRequest.");
3285
3286     bdrr->num_setnames = req->num_resultSetList;
3287     bdrr->setnames = req->resultSetList;
3288     for (i = 0; i<req->num_resultSetList; i++)
3289         yaz_log(log_requestdetail, "resultset: '%s'",
3290                 req->resultSetList[i]);
3291     bdrr->stream = assoc->encode;
3292     bdrr->print = assoc->print;
3293     bdrr->function = *req->deleteFunction;
3294     bdrr->referenceId = req->referenceId;
3295     bdrr->statuses = 0;
3296     if (bdrr->num_setnames > 0)
3297     {
3298         bdrr->statuses = (int*)
3299             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3300                        bdrr->num_setnames);
3301         for (i = 0; i < bdrr->num_setnames; i++)
3302             bdrr->statuses[i] = 0;
3303     }
3304     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3305
3306     res->referenceId = req->referenceId;
3307
3308     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3309
3310     res->deleteListStatuses = 0;
3311     if (bdrr->num_setnames > 0)
3312     {
3313         int i;
3314         res->deleteListStatuses = (Z_ListStatuses *)
3315             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3316         res->deleteListStatuses->num = bdrr->num_setnames;
3317         res->deleteListStatuses->elements =
3318             (Z_ListStatus **)
3319             odr_malloc (assoc->encode,
3320                         sizeof(*res->deleteListStatuses->elements) *
3321                         bdrr->num_setnames);
3322         for (i = 0; i<bdrr->num_setnames; i++)
3323         {
3324             res->deleteListStatuses->elements[i] =
3325                 (Z_ListStatus *)
3326                 odr_malloc (assoc->encode,
3327                             sizeof(**res->deleteListStatuses->elements));
3328             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3329             res->deleteListStatuses->elements[i]->id =
3330                 odr_strdup (assoc->encode, bdrr->setnames[i]);
3331         }
3332     }
3333     res->numberNotDeleted = 0;
3334     res->bulkStatuses = 0;
3335     res->deleteMessage = 0;
3336     res->otherInfo = 0;
3337
3338     apdu->which = Z_APDU_deleteResultSetResponse;
3339     apdu->u.deleteResultSetResponse = res;
3340     if (log_request)
3341     {
3342         WRBUF wr = wrbuf_alloc();
3343         wrbuf_printf(wr, "Delete ");
3344         if (bdrr->delete_status)
3345             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3346         else
3347             wrbuf_printf(wr, "OK -");
3348         for (i = 0; i<req->num_resultSetList; i++)
3349             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3350         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3351         wrbuf_free(wr, 1);
3352     }
3353     return apdu;
3354 }
3355
3356 static void process_close(association *assoc, request *reqb)
3357 {
3358     Z_Close *req = reqb->apdu_request->u.close;
3359     static char *reasons[] =
3360     {
3361         "finished",
3362         "shutdown",
3363         "systemProblem",
3364         "costLimit",
3365         "resources",
3366         "securityViolation",
3367         "protocolError",
3368         "lackOfActivity",
3369         "peerAbort",
3370         "unspecified"
3371     };
3372
3373     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3374         reasons[*req->closeReason], req->diagnosticInformation ?
3375         req->diagnosticInformation : "NULL");
3376     if (assoc->version < 3) /* to make do_force respond with close */
3377         assoc->version = 3;
3378     do_close_req(assoc, Z_Close_finished,
3379                  "Association terminated by client", reqb);
3380     yaz_log(log_request,"Close OK");
3381 }
3382
3383 void save_referenceId (request *reqb, Z_ReferenceId *refid)
3384 {
3385     if (refid)
3386     {
3387         reqb->len_refid = refid->len;
3388         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
3389         memcpy (reqb->refid, refid->buf, refid->len);
3390     }
3391     else
3392     {
3393         reqb->len_refid = 0;
3394         reqb->refid = NULL;
3395     }
3396 }
3397
3398 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
3399 {
3400     process_z_response (a, req, res);
3401 }
3402
3403 bend_request bend_request_mk (bend_association a)
3404 {
3405     request *nreq = request_get (&a->outgoing);
3406     nreq->request_mem = nmem_create ();
3407     return nreq;
3408 }
3409
3410 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
3411 {
3412     Z_ReferenceId *id;
3413     if (!req->refid)
3414         return 0;
3415     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
3416     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
3417     id->len = id->size = req->len_refid;
3418     memcpy (id->buf, req->refid, req->len_refid);
3419     return id;
3420 }
3421
3422 void bend_request_destroy (bend_request *req)
3423 {
3424     nmem_destroy((*req)->request_mem);
3425     request_release(*req);
3426     *req = NULL;
3427 }
3428
3429 int bend_backend_respond (bend_association a, bend_request req)
3430 {
3431     char *msg;
3432     int r;
3433     r = process_z_request (a, req, &msg);
3434     if (r < 0)
3435         yaz_log (YLOG_WARN, "%s", msg);
3436     return r;
3437 }
3438
3439 void bend_request_setdata(bend_request r, void *p)
3440 {
3441     r->clientData = p;
3442 }
3443
3444 void *bend_request_getdata(bend_request r)
3445 {
3446     return r->clientData;
3447 }
3448
3449 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
3450 {
3451     bend_segment_rr req;
3452
3453     req.segment = reqb->apdu_request->u.segmentRequest;
3454     req.stream = assoc->encode;
3455     req.decode = assoc->decode;
3456     req.print = assoc->print;
3457     req.association = assoc;
3458
3459     (*assoc->init->bend_segment)(assoc->backend, &req);
3460
3461     return 0;
3462 }
3463
3464 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3465 {
3466     bend_esrequest_rr esrequest;
3467     const char *ext_name = "unknown";
3468
3469     Z_ExtendedServicesRequest *req =
3470         reqb->apdu_request->u.extendedServicesRequest;
3471     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3472
3473     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3474
3475     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3476     esrequest.stream = assoc->encode;
3477     esrequest.decode = assoc->decode;
3478     esrequest.print = assoc->print;
3479     esrequest.errcode = 0;
3480     esrequest.errstring = NULL;
3481     esrequest.request = reqb;
3482     esrequest.association = assoc;
3483     esrequest.taskPackage = 0;
3484     esrequest.referenceId = req->referenceId;
3485
3486
3487     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3488     {
3489         switch(esrequest.esr->taskSpecificParameters->which)
3490         {
3491         case Z_External_itemOrder:
3492             ext_name = "ItemOrder"; break;
3493         case Z_External_update:
3494             ext_name = "Update"; break;
3495         case Z_External_update0:
3496             ext_name = "Update0"; break;
3497         case Z_External_ESAdmin:
3498             ext_name = "Admin"; break;
3499
3500         }
3501     }
3502
3503     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3504
3505     /* If the response is being delayed, return NULL */
3506     if (esrequest.request == NULL)
3507         return(NULL);
3508
3509     resp->referenceId = req->referenceId;
3510
3511     if (esrequest.errcode == -1)
3512     {
3513         /* Backend service indicates request will be processed */
3514         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3515         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3516     }
3517     else if (esrequest.errcode == 0)
3518     {
3519         /* Backend service indicates request will be processed */
3520         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3521         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3522     }
3523     else
3524     {
3525         Z_DiagRecs *diagRecs =
3526             zget_DiagRecs(assoc->encode, esrequest.errcode,
3527                           esrequest.errstring);
3528         /* Backend indicates error, request will not be processed */
3529         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3530         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3531         resp->num_diagnostics = diagRecs->num_diagRecs;
3532         resp->diagnostics = diagRecs->diagRecs;
3533         if (log_request)
3534         {
3535             WRBUF wr = wrbuf_alloc();
3536             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3537             yaz_log(log_request, "EsRequest %s", wrbuf_buf(wr) );
3538             wrbuf_free(wr, 1);
3539         }
3540
3541     }
3542     /* Do something with the members of bend_extendedservice */
3543     if (esrequest.taskPackage)
3544         resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED,
3545                                          (const char *)  esrequest.taskPackage,
3546                                           -1);
3547     yaz_log(YLOG_DEBUG,"Send the result apdu");
3548     return apdu;
3549 }
3550
3551 int bend_assoc_is_alive(bend_association assoc)
3552 {
3553     if (assoc->state == ASSOC_DEAD)
3554         return 0; /* already marked as dead. Don't check I/O chan anymore */
3555
3556     return iochan_is_alive(assoc->client_chan);
3557 }
3558
3559
3560 /*
3561  * Local variables:
3562  * c-basic-offset: 4
3563  * indent-tabs-mode: nil
3564  * End:
3565  * vim: shiftwidth=4 tabstop=8 expandtab
3566  */
3567