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 1.111 2007-03-13 09:12:09 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     return 0;
 681 }
 682
 683 static int srw_bend_fetch(association *assoc, int pos,
 684                           Z_SRW_searchRetrieveRequest *srw_req,
 685                           Z_SRW_record *record,
 686                           const char **addinfo)
 687 {
 688     bend_fetch_rr rr;
 689     ODR o = assoc->encode;
 690
 691     rr.setname = "default";
 692     rr.number = pos;
 693     rr.referenceId = 0;
 694     rr.request_format = VAL_TEXT_XML;
 695     rr.request_format_raw = yaz_oidval_to_z3950oid(assoc->decode,
 696                                                    CLASS_RECSYN,
 697                                                    VAL_TEXT_XML);
 698     rr.comp = (Z_RecordComposition *)
 699             odr_malloc(assoc->decode, sizeof(*rr.comp));
 700     rr.comp->which = Z_RecordComp_complex;
 701     rr.comp->u.complex = (Z_CompSpec *)
 702             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 703     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 704         odr_malloc(assoc->encode, sizeof(bool_t));
 705     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 706     rr.comp->u.complex->num_dbSpecific = 0;
 707     rr.comp->u.complex->dbSpecific = 0;
 708     rr.comp->u.complex->num_recordSyntax = 0;
 709     rr.comp->u.complex->recordSyntax = 0;
 710
 711     rr.comp->u.complex->generic = (Z_Specification *)
 712             odr_malloc(assoc->decode, sizeof(Z_Specification));
 713
 714     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 715     rr.comp->u.complex->generic->which = Z_Schema_uri;
 716     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 717
 718     /* ESN = recordSchema if recordSchema is present */
 719     rr.comp->u.complex->generic->elementSpec = 0;
 720     if (srw_req->recordSchema)
 721     {
 722         rr.comp->u.complex->generic->elementSpec =
 723             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 724         rr.comp->u.complex->generic->elementSpec->which =
 725             Z_ElementSpec_elementSetName;
 726         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 727             srw_req->recordSchema;
 728     }
 729
 730     rr.stream = assoc->encode;
 731     rr.print = assoc->print;
 732
 733     rr.basename = 0;
 734     rr.len = 0;
 735     rr.record = 0;
 736     rr.last_in_set = 0;
 737     rr.errcode = 0;
 738     rr.errstring = 0;
 739     rr.surrogate_flag = 0;
 740     rr.schema = srw_req->recordSchema;
 741
 742     if (!assoc->init->bend_fetch)
 743         return 1;
 744
 745     retrieve_fetch(assoc, &rr);
 746
 747     if (rr.errcode && rr.surrogate_flag)
 748     {
 749         int code = yaz_diag_bib1_to_srw(rr.errcode);
 750         const char *message = yaz_diag_srw_str(code);
 751         int len = 200;
 752         if (message)
 753             len += strlen(message);
 754         if (rr.errstring)
 755             len += strlen(rr.errstring);
 756
 757         record->recordData_buf = odr_malloc(o, len);
 758
 759         sprintf(record->recordData_buf, "<diagnostic "
 760                 "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
 761                 " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
 762         if (rr.errstring)
 763             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 764                     " <details>%s</details>\n", rr.errstring);
 765         if (message)
 766             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 767                     " <message>%s</message>\n", message);
 768         sprintf(record->recordData_buf + strlen(record->recordData_buf),
 769                 "</diagnostic>\n");
 770         record->recordData_len = strlen(record->recordData_buf);
 771         record->recordPosition = odr_intdup(o, pos);
 772         record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
 773         return 0;
 774     }
 775     else if (rr.len >= 0)
 776     {
 777         record->recordData_buf = rr.record;
 778         record->recordData_len = rr.len;
 779         record->recordPosition = odr_intdup(o, pos);
 780         if (rr.schema)
 781             record->recordSchema = odr_strdup(o, rr.schema);
 782         else
 783             record->recordSchema = 0;
 784     }
 785     if (rr.errcode)
 786     {
 787         *addinfo = rr.errstring;
 788         return rr.errcode;
 789     }
 790     return 0;
 791 }
 792
 793 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 794                    Z_Query *query_result)
 795 {
 796     /* have a CQL query and  CQL to PQF transform .. */
 797     CQL_parser cp = cql_parser_create();
 798     int r;
 799     int srw_errcode = 0;
 800     const char *add = 0;
 801     char rpn_buf[5120];
 802
 803     r = cql_parser_string(cp, cql);
 804     if (r)
 805     {
 806         /* CQL syntax error */
 807         srw_errcode = 10;
 808     }
 809     if (!r)
 810     {
 811         /* Syntax OK */
 812         r = cql_transform_buf(ct,
 813                               cql_parser_result(cp),
 814                               rpn_buf, sizeof(rpn_buf)-1);
 815         if (r)
 816             srw_errcode  = cql_transform_error(ct, &add);
 817     }
 818     if (!r)
 819     {
 820         /* Syntax & transform OK. */
 821         /* Convert PQF string to Z39.50 to RPN query struct */
 822         YAZ_PQF_Parser pp = yaz_pqf_create();
 823         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 824         if (!rpnquery)
 825         {
 826             size_t off;
 827             const char *pqf_msg;
 828             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 829             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 830                     pqf_msg, code);
 831             srw_errcode = 10;
 832         }
 833         else
 834         {
 835             query_result->which = Z_Query_type_1;
 836             query_result->u.type_1 = rpnquery;
 837         }
 838         yaz_pqf_destroy(pp);
 839     }
 840     cql_parser_destroy(cp);
 841     return srw_errcode;
 842 }
 843
 844 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 845                         Z_AttributesPlusTerm *result)
 846 {
 847     Z_Query query;
 848     Z_RPNQuery *rpn;
 849     int srw_error = cql2pqf(odr, cql, ct, &query);
 850     if (srw_error)
 851         return srw_error;
 852     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 853         return 10; /* bad query type */
 854     rpn = query.u.type_1;
 855     if (!rpn->RPNStructure)
 856         return 10; /* must be structure */
 857     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 858         return 10; /* must be simple */
 859     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 860         return 10; /* must be attributes plus term node .. */
 861     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 862            sizeof(*result));
 863     return 0;
 864 }
 865
 866 static void srw_bend_search(association *assoc, request *req,
 867                             Z_SRW_PDU *sr,
 868                             Z_SRW_searchRetrieveResponse *srw_res,
 869                             int *http_code)
 870 {
 871     int srw_error = 0;
 872     Z_External *ext;
 873     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 874
 875     *http_code = 200;
 876     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 877     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 878     if (srw_res->num_diagnostics == 0 && assoc->init)
 879     {
 880         bend_search_rr rr;
 881         rr.setname = "default";
 882         rr.replace_set = 1;
 883         rr.num_bases = 1;
 884         rr.basenames = &srw_req->database;
 885         rr.referenceId = 0;
 886         rr.srw_sortKeys = 0;
 887         rr.srw_setname = 0;
 888         rr.srw_setnameIdleTime = 0;
 889         rr.estimated_hit_count = 0;
 890         rr.partial_resultset = 0;
 891         rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 892         rr.query->u.type_1 = 0;
 893
 894         if (srw_req->query_type == Z_SRW_query_type_cql)
 895         {
 896             if (assoc->server && assoc->server->cql_transform)
 897             {
 898                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 899                                           assoc->server->cql_transform,
 900                                           rr.query);
 901                 if (srw_errcode)
 902                 {
 903                     yaz_add_srw_diagnostic(assoc->encode,
 904                                            &srw_res->diagnostics,
 905                                            &srw_res->num_diagnostics,
 906                                            srw_errcode, 0);
 907                 }
 908             }
 909             else
 910             {
 911                 /* CQL query to backend. Wrap it - Z39.50 style */
 912                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 913                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 914                                                         "1.2.840.10003.16.2");
 915                 ext->indirect_reference = 0;
 916                 ext->descriptor = 0;
 917                 ext->which = Z_External_CQL;
 918                 ext->u.cql = srw_req->query.cql;
 919
 920                 rr.query->which = Z_Query_type_104;
 921                 rr.query->u.type_104 =  ext;
 922             }
 923         }
 924         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 925         {
 926             Z_RPNQuery *RPNquery;
 927             YAZ_PQF_Parser pqf_parser;
 928
 929             pqf_parser = yaz_pqf_create ();
 930
 931             RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
 932                                       srw_req->query.pqf);
 933             if (!RPNquery)
 934             {
 935                 const char *pqf_msg;
 936                 size_t off;
 937                 int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
 938                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 939                         code, pqf_msg, (long) off);
 940                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 941             }
 942
 943             rr.query->which = Z_Query_type_1;
 944             rr.query->u.type_1 =  RPNquery;
 945
 946             yaz_pqf_destroy (pqf_parser);
 947         }
 948         else
 949         {
 950             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 951                                    &srw_res->num_diagnostics,
 952                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 953         }
 954         if (rr.query->u.type_1)
 955         {
 956             rr.stream = assoc->encode;
 957             rr.decode = assoc->decode;
 958             rr.print = assoc->print;
 959             rr.request = req;
 960             if ( srw_req->sort.sortKeys )
 961                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 962                                              srw_req->sort.sortKeys );
 963             rr.association = assoc;
 964             rr.fd = 0;
 965             rr.hits = 0;
 966             rr.errcode = 0;
 967             rr.errstring = 0;
 968             rr.search_info = 0;
 969             yaz_log_zquery_level(log_requestdetail,rr.query);
 970
 971             (assoc->init->bend_search)(assoc->backend, &rr);
 972             if (rr.errcode)
 973             {
 974                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 975                 {
 976                     *http_code = 404;
 977                 }
 978                 else
 979                 {
 980                     srw_error = yaz_diag_bib1_to_srw (rr.errcode);
 981                     yaz_add_srw_diagnostic(assoc->encode,
 982                                            &srw_res->diagnostics,
 983                                            &srw_res->num_diagnostics,
 984                                            srw_error, rr.errstring);
 985                 }
 986             }
 987             else
 988             {
 989                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
 990                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
 991
 992                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
 993                         start, number, rr.hits);
 994
 995                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 996                 if (rr.srw_setname)
 997                 {
 998                     srw_res->resultSetId =
 999                         odr_strdup(assoc->encode, rr.srw_setname );
1000                     srw_res->resultSetIdleTime =
1001                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
1002                 }
1003
1004                 if ((rr.hits > 0 && start > rr.hits) || start < 1)
1005                 {
1006                     yaz_add_srw_diagnostic(
1007                         assoc->encode,
1008                         &srw_res->diagnostics, &srw_res->num_diagnostics,
1009                         YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1010                 }
1011                 else if (number > 0)
1012                 {
1013                     int i;
1014                     int ok = 1;
1015                     if (start + number > rr.hits)
1016                         number = rr.hits - start + 1;
1017
1018                     /* Call bend_present if defined */
1019                     if (assoc->init->bend_present)
1020                     {
1021                         bend_present_rr *bprr = (bend_present_rr*)
1022                             odr_malloc (assoc->decode, sizeof(*bprr));
1023                         bprr->setname = "default";
1024                         bprr->start = start;
1025                         bprr->number = number;
1026                         bprr->format = VAL_TEXT_XML;
1027                         if (srw_req->recordSchema)
1028                         {
1029                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1030                                                                             sizeof(*bprr->comp));
1031                             bprr->comp->which = Z_RecordComp_simple;
1032                             bprr->comp->u.simple = (Z_ElementSetNames *)
1033                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1034                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1035                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1036                         }
1037                         else
1038                         {
1039                             bprr->comp = 0;
1040                         }
1041                         bprr->stream = assoc->encode;
1042                         bprr->referenceId = 0;
1043                         bprr->print = assoc->print;
1044                         bprr->request = req;
1045                         bprr->association = assoc;
1046                         bprr->errcode = 0;
1047                         bprr->errstring = NULL;
1048                         (*assoc->init->bend_present)(assoc->backend, bprr);
1049
1050                         if (!bprr->request)
1051                             return;
1052                         if (bprr->errcode)
1053                         {
1054                             srw_error = yaz_diag_bib1_to_srw (bprr->errcode);
1055                             yaz_add_srw_diagnostic(assoc->encode,
1056                                                    &srw_res->diagnostics,
1057                                                    &srw_res->num_diagnostics,
1058                                                    srw_error, bprr->errstring);
1059                             ok = 0;
1060                         }
1061                     }
1062
1063                     if (ok)
1064                     {
1065                         int j = 0;
1066                         int packing = Z_SRW_recordPacking_string;
1067                         if (srw_req->recordPacking)
1068                         {
1069                             packing =
1070                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1071                             if (packing == -1)
1072                                 packing = Z_SRW_recordPacking_string;
1073                         }
1074                         srw_res->records = (Z_SRW_record *)
1075                             odr_malloc(assoc->encode,
1076                                        number * sizeof(*srw_res->records));
1077
1078                         srw_res->extra_records = (Z_SRW_extra_record **)
1079                             odr_malloc(assoc->encode,
1080                                        number*sizeof(*srw_res->extra_records));
1081
1082                         for (i = 0; i<number; i++)
1083                         {
1084                             int errcode;
1085                             const char *addinfo = 0;
1086
1087                             srw_res->records[j].recordPacking = packing;
1088                             srw_res->records[j].recordData_buf = 0;
1089                             srw_res->extra_records[j] = 0;
1090                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1091                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1092                                                      srw_res->records + j,
1093                                                      &addinfo);
1094                             if (errcode)
1095                             {
1096                                 yaz_add_srw_diagnostic(assoc->encode,
1097                                                        &srw_res->diagnostics,
1098                                                        &srw_res->num_diagnostics,
1099                                                        yaz_diag_bib1_to_srw (errcode),
1100                                                        addinfo);
1101
1102                                 break;
1103                             }
1104                             if (srw_res->records[j].recordData_buf)
1105                                 j++;
1106                         }
1107                         srw_res->num_records = j;
1108                         if (!j)
1109                             srw_res->records = 0;
1110                     }
1111                 }
1112                 if (rr.estimated_hit_count || rr.partial_resultset)
1113                 {
1114                     yaz_add_srw_diagnostic(
1115                         assoc->encode,
1116                         &srw_res->diagnostics,
1117                         &srw_res->num_diagnostics,
1118                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1119                         0);
1120                 }
1121             }
1122         }
1123     }
1124     if (log_request)
1125     {
1126         const char *querystr = "?";
1127         const char *querytype = "?";
1128         WRBUF wr = wrbuf_alloc();
1129
1130         switch (srw_req->query_type)
1131         {
1132         case Z_SRW_query_type_cql:
1133             querytype = "CQL";
1134             querystr = srw_req->query.cql;
1135             break;
1136         case Z_SRW_query_type_pqf:
1137             querytype = "PQF";
1138             querystr = srw_req->query.pqf;
1139             break;
1140         }
1141         wrbuf_printf(wr, "SRWSearch ");
1142         wrbuf_printf(wr, srw_req->database);
1143         wrbuf_printf(wr, " ");
1144         if (srw_res->num_diagnostics)
1145             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1146         else if (*http_code != 200)
1147             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1148         else if (srw_res->numberOfRecords)
1149         {
1150             wrbuf_printf(wr, "OK %d",
1151                          (srw_res->numberOfRecords ?
1152                           *srw_res->numberOfRecords : 0));
1153         }
1154         wrbuf_printf(wr, " %s %d+%d",
1155                      (srw_res->resultSetId ?
1156                       srw_res->resultSetId : "-"),
1157                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1158                      srw_res->num_records);
1159         yaz_log(log_request, "%s %s: %s", wrbuf_buf(wr), querytype, querystr);
1160         wrbuf_free(wr, 1);
1161     }
1162 }
1163
1164 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1165 {
1166 #if YAZ_HAVE_XML2
1167     xmlNodePtr ptr = rr->server_node_ptr;
1168     if (!ptr)
1169         return 0;
1170     for (ptr = ptr->children; ptr; ptr = ptr->next)
1171     {
1172         if (ptr->type != XML_ELEMENT_NODE)
1173             continue;
1174         if (!strcmp((const char *) ptr->name, "explain"))
1175         {
1176             int len;
1177             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1178             xmlChar *buf_out;
1179             char *content;
1180
1181             ptr = xmlCopyNode(ptr, 1);
1182
1183             xmlDocSetRootElement(doc, ptr);
1184
1185             xmlDocDumpMemory(doc, &buf_out, &len);
1186             content = (char*) odr_malloc(rr->stream, 1+len);
1187             memcpy(content, buf_out, len);
1188             content[len] = '\0';
1189
1190             xmlFree(buf_out);
1191             xmlFreeDoc(doc);
1192             rr->explain_buf = content;
1193             return 0;
1194         }
1195     }
1196 #endif
1197     return 0;
1198 }
1199
1200 static void srw_bend_explain(association *assoc, request *req,
1201                              Z_SRW_PDU *sr,
1202                              Z_SRW_explainResponse *srw_res,
1203                              int *http_code)
1204 {
1205     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1206     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1207     *http_code = 404;
1208     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1209     if (assoc->init)
1210     {
1211         bend_explain_rr rr;
1212
1213         rr.stream = assoc->encode;
1214         rr.decode = assoc->decode;
1215         rr.print = assoc->print;
1216         rr.explain_buf = 0;
1217         rr.database = srw_req->database;
1218         if (assoc->server)
1219             rr.server_node_ptr = assoc->server->server_node_ptr;
1220         else
1221             rr.server_node_ptr = 0;
1222         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1223         if (assoc->init->bend_explain)
1224             (*assoc->init->bend_explain)(assoc->backend, &rr);
1225         else
1226             srw_bend_explain_default(assoc->backend, &rr);
1227
1228         if (rr.explain_buf)
1229         {
1230             int packing = Z_SRW_recordPacking_string;
1231             if (srw_req->recordPacking)
1232             {
1233                 packing =
1234                     yaz_srw_str_to_pack(srw_req->recordPacking);
1235                 if (packing == -1)
1236                     packing = Z_SRW_recordPacking_string;
1237             }
1238             srw_res->record.recordSchema = rr.schema;
1239             srw_res->record.recordPacking = packing;
1240             srw_res->record.recordData_buf = rr.explain_buf;
1241             srw_res->record.recordData_len = strlen(rr.explain_buf);
1242             srw_res->record.recordPosition = 0;
1243             *http_code = 200;
1244         }
1245     }
1246 }
1247
1248 static void srw_bend_scan(association *assoc, request *req,
1249                           Z_SRW_PDU *sr,
1250                           Z_SRW_scanResponse *srw_res,
1251                           int *http_code)
1252 {
1253     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1254     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1255
1256     *http_code = 200;
1257     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1258     if (srw_res->num_diagnostics == 0 && assoc->init)
1259     {
1260         struct scan_entry *save_entries;
1261
1262         bend_scan_rr *bsrr = (bend_scan_rr *)
1263             odr_malloc (assoc->encode, sizeof(*bsrr));
1264         bsrr->num_bases = 1;
1265         bsrr->basenames = &srw_req->database;
1266
1267         bsrr->num_entries = srw_req->maximumTerms ?
1268             *srw_req->maximumTerms : 10;
1269         bsrr->term_position = srw_req->responsePosition ?
1270             *srw_req->responsePosition : 1;
1271
1272         bsrr->errcode = 0;
1273         bsrr->errstring = 0;
1274         bsrr->referenceId = 0;
1275         bsrr->stream = assoc->encode;
1276         bsrr->print = assoc->print;
1277         bsrr->step_size = odr_intdup(assoc->decode, 0);
1278         bsrr->entries = 0;
1279
1280         if (bsrr->num_entries > 0)
1281         {
1282             int i;
1283             bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1284                                        bsrr->num_entries);
1285             for (i = 0; i<bsrr->num_entries; i++)
1286             {
1287                 bsrr->entries[i].term = 0;
1288                 bsrr->entries[i].occurrences = 0;
1289                 bsrr->entries[i].errcode = 0;
1290                 bsrr->entries[i].errstring = 0;
1291                 bsrr->entries[i].display_term = 0;
1292             }
1293         }
1294         save_entries = bsrr->entries;  /* save it so we can compare later */
1295
1296         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1297             assoc->init->bend_scan)
1298         {
1299             Odr_oid *scan_attributeSet = 0;
1300             oident *attset;
1301             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1302
1303             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1304                                       &scan_attributeSet,
1305                                       srw_req->scanClause.pqf);
1306             if (scan_attributeSet &&
1307                 (attset = oid_getentbyoid(scan_attributeSet)) &&
1308                 (attset->oclass == CLASS_ATTSET ||
1309                  attset->oclass == CLASS_GENERAL))
1310                 bsrr->attributeset = attset->value;
1311             else
1312                 bsrr->attributeset = VAL_NONE;
1313             yaz_pqf_destroy(pqf_parser);
1314             bsrr->scanClause = 0;
1315             ((int (*)(void *, bend_scan_rr *))
1316              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1317         }
1318         else if (srw_req->query_type == Z_SRW_query_type_cql
1319                  && assoc->init->bend_scan && assoc->server
1320                  && assoc->server->cql_transform)
1321         {
1322             int srw_error;
1323             bsrr->scanClause = 0;
1324             bsrr->attributeset = VAL_NONE;
1325             bsrr->term = odr_malloc(assoc->decode, sizeof(*bsrr->term));
1326             srw_error = cql2pqf_scan(assoc->encode,
1327                                      srw_req->scanClause.cql,
1328                                      assoc->server->cql_transform,
1329                                      bsrr->term);
1330             if (srw_error)
1331                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1332                                        &srw_res->num_diagnostics,
1333                                        srw_error, 0);
1334             else
1335             {
1336                 ((int (*)(void *, bend_scan_rr *))
1337                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1338             }
1339         }
1340         else if (srw_req->query_type == Z_SRW_query_type_cql
1341                  && assoc->init->bend_srw_scan)
1342         {
1343             bsrr->term = 0;
1344             bsrr->attributeset = VAL_NONE;
1345             bsrr->scanClause = srw_req->scanClause.cql;
1346             ((int (*)(void *, bend_scan_rr *))
1347              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1348         }
1349         else
1350         {
1351             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1352                                    &srw_res->num_diagnostics,
1353                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1354         }
1355         if (bsrr->errcode)
1356         {
1357             int srw_error;
1358             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1359             {
1360                 *http_code = 404;
1361                 return;
1362             }
1363             srw_error = yaz_diag_bib1_to_srw (bsrr->errcode);
1364
1365             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1366                                    &srw_res->num_diagnostics,
1367                                    srw_error, bsrr->errstring);
1368         }
1369         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1370         {
1371             int i;
1372             srw_res->terms = (Z_SRW_scanTerm*)
1373                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1374                            bsrr->num_entries);
1375
1376             srw_res->num_terms =  bsrr->num_entries;
1377             for (i = 0; i<bsrr->num_entries; i++)
1378             {
1379                 Z_SRW_scanTerm *t = srw_res->terms + i;
1380                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1381                 t->numberOfRecords =
1382                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1383                 t->displayTerm = 0;
1384                 if (save_entries == bsrr->entries &&
1385                     bsrr->entries[i].display_term)
1386                 {
1387                     /* the entries was _not_ set by the handler. So it's
1388                        safe to test for new member display_term. It is
1389                        NULL'ed by us.
1390                     */
1391                     t->displayTerm = odr_strdup(assoc->encode,
1392                                                 bsrr->entries[i].display_term);
1393                 }
1394                 t->whereInList = 0;
1395             }
1396         }
1397     }
1398     if (log_request)
1399     {
1400         WRBUF wr = wrbuf_alloc();
1401         const char *querytype = 0;
1402         const char *querystr = 0;
1403
1404         switch(srw_req->query_type)
1405         {
1406         case Z_SRW_query_type_pqf:
1407             querytype = "PQF";
1408             querystr = srw_req->scanClause.pqf;
1409             break;
1410         case Z_SRW_query_type_cql:
1411             querytype = "CQL";
1412             querystr = srw_req->scanClause.cql;
1413             break;
1414         default:
1415             querytype = "UNKNOWN";
1416             querystr = "";
1417         }
1418
1419         wrbuf_printf(wr, "SRWScan ");
1420         wrbuf_printf(wr, srw_req->database);
1421         wrbuf_printf(wr, " ");
1422
1423         if (srw_res->num_diagnostics)
1424             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1425         else if (srw_res->num_terms)
1426             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1427         else
1428             wrbuf_printf(wr, "OK - - ");
1429
1430         wrbuf_printf(wr, "%d+%d+0 ",
1431                      (srw_req->responsePosition ?
1432                       *srw_req->responsePosition : 1),
1433                      (srw_req->maximumTerms ?
1434                       *srw_req->maximumTerms : 1));
1435         /* there is no step size in SRU/W ??? */
1436         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1437         yaz_log(log_request, "%s ", wrbuf_buf(wr) );
1438         wrbuf_free(wr, 1);
1439     }
1440
1441 }
1442
1443 static void srw_bend_update(association *assoc, request *req,
1444                             Z_SRW_PDU *sr,
1445                             Z_SRW_updateResponse *srw_res,
1446                             int *http_code)
1447 {
1448     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1449     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1450     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1451     *http_code = 404;
1452     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1453     if (assoc->init)
1454     {
1455         bend_update_rr rr;
1456         Z_SRW_extra_record *extra = srw_req->extra_record;
1457
1458         rr.stream = assoc->encode;
1459         rr.print = assoc->print;
1460         rr.num_bases = 1;
1461         rr.basenames = &srw_req->database;
1462         rr.operation = srw_req->operation;
1463         rr.operation_status = "failed";
1464         rr.record_id = 0;
1465         rr.record_versions = 0;
1466         rr.num_versions = 0;
1467         rr.record_packing = "string";
1468         rr.record_schema = 0;
1469         rr.record_data = 0;
1470         rr.extra_record_data = 0;
1471         rr.extra_request_data = 0;
1472         rr.extra_response_data = 0;
1473         rr.uri = 0;
1474         rr.message = 0;
1475         rr.details = 0;
1476
1477         *http_code = 200;
1478         if (rr.operation == 0)
1479         {
1480             yaz_add_sru_update_diagnostic(
1481                 assoc->encode, &srw_res->diagnostics,
1482                 &srw_res->num_diagnostics,
1483                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1484                 "action" );
1485             return;
1486         }
1487         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1488         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1489         if (!strcmp( rr.operation, "delete"))
1490         {
1491             if (srw_req->record && !srw_req->record->recordSchema)
1492             {
1493                 rr.record_schema = odr_strdup(
1494                     assoc->encode,
1495                     srw_req->record->recordSchema);
1496             }
1497             if (srw_req->record)
1498             {
1499                 rr.record_data = odr_strdupn(
1500                     assoc->encode,
1501                     srw_req->record->recordData_buf,
1502                     srw_req->record->recordData_len );
1503             }
1504             if (extra && extra->extraRecordData_len)
1505             {
1506                 rr.extra_record_data = odr_strdupn(
1507                     assoc->encode,
1508                     extra->extraRecordData_buf,
1509                     extra->extraRecordData_len );
1510             }
1511             if (srw_req->recordId)
1512                 rr.record_id = srw_req->recordId;
1513             else if (extra && extra->recordIdentifier)
1514                 rr.record_id = extra->recordIdentifier;
1515         }
1516         else if (!strcmp(rr.operation, "replace"))
1517         {
1518             if (srw_req->recordId)
1519                 rr.record_id = srw_req->recordId;
1520             else if (extra && extra->recordIdentifier)
1521                 rr.record_id = extra->recordIdentifier;
1522             else
1523             {
1524                 yaz_add_sru_update_diagnostic(
1525                     assoc->encode, &srw_res->diagnostics,
1526                     &srw_res->num_diagnostics,
1527                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1528                     "recordIdentifier");
1529             }
1530             if (!srw_req->record)
1531             {
1532                 yaz_add_sru_update_diagnostic(
1533                     assoc->encode, &srw_res->diagnostics,
1534                     &srw_res->num_diagnostics,
1535                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1536                     "record");
1537             }
1538             else
1539             {
1540                 if (srw_req->record->recordSchema)
1541                     rr.record_schema = odr_strdup(
1542                         assoc->encode, srw_req->record->recordSchema);
1543                 if (srw_req->record->recordData_len )
1544                 {
1545                     rr.record_data = odr_strdupn(assoc->encode,
1546                                                  srw_req->record->recordData_buf,
1547                                                  srw_req->record->recordData_len );
1548                 }
1549                 else
1550                 {
1551                     yaz_add_sru_update_diagnostic(
1552                         assoc->encode, &srw_res->diagnostics,
1553                         &srw_res->num_diagnostics,
1554                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1555                         "recordData" );
1556                 }
1557             }
1558             if (extra && extra->extraRecordData_len)
1559             {
1560                 rr.extra_record_data = odr_strdupn(
1561                     assoc->encode,
1562                     extra->extraRecordData_buf,
1563                     extra->extraRecordData_len );
1564             }
1565         }
1566         else if (!strcmp(rr.operation, "insert"))
1567         {
1568             if (srw_req->recordId)
1569                 rr.record_id = srw_req->recordId;
1570             else if (extra)
1571                 rr.record_id = extra->recordIdentifier;
1572
1573             if (srw_req->record)
1574             {
1575                 if (srw_req->record->recordSchema)
1576                     rr.record_schema = odr_strdup(
1577                         assoc->encode, srw_req->record->recordSchema);
1578
1579                 if (srw_req->record->recordData_len)
1580                     rr.record_data = odr_strdupn(
1581                         assoc->encode,
1582                         srw_req->record->recordData_buf,
1583                         srw_req->record->recordData_len );
1584             }
1585             if (extra && extra->extraRecordData_len)
1586             {
1587                 rr.extra_record_data = odr_strdupn(
1588                     assoc->encode,
1589                     extra->extraRecordData_buf,
1590                     extra->extraRecordData_len );
1591             }
1592         }
1593         else
1594             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1595                                           &srw_res->num_diagnostics,
1596                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1597                                           rr.operation );
1598
1599         if (srw_req->record)
1600         {
1601             const char *pack_str =
1602                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1603             if (pack_str)
1604                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1605         }
1606
1607         if (srw_req->num_recordVersions)
1608         {
1609             rr.record_versions = srw_req->recordVersions;
1610             rr.num_versions = srw_req->num_recordVersions;
1611         }
1612         if (srw_req->extraRequestData_len)
1613         {
1614             rr.extra_request_data = odr_strdupn(assoc->encode,
1615                                                 srw_req->extraRequestData_buf,
1616                                                 srw_req->extraRequestData_len );
1617         }
1618         if (srw_res->num_diagnostics == 0)
1619         {
1620             if ( assoc->init->bend_srw_update)
1621                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1622             else
1623                 yaz_add_sru_update_diagnostic(
1624                     assoc->encode, &srw_res->diagnostics,
1625                     &srw_res->num_diagnostics,
1626                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1627                     "No Update backend handler");
1628         }
1629
1630         if (rr.uri)
1631             yaz_add_srw_diagnostic_uri(assoc->encode,
1632                                        &srw_res->diagnostics,
1633                                        &srw_res->num_diagnostics,
1634                                        rr.uri,
1635                                        rr.message,
1636                                        rr.details);
1637         srw_res->recordId = rr.record_id;
1638         srw_res->operationStatus = rr.operation_status;
1639         srw_res->recordVersions = rr.record_versions;
1640         srw_res->num_recordVersions = rr.num_versions;
1641         if (srw_res->extraResponseData_len)
1642         {
1643             srw_res->extraResponseData_buf = rr.extra_response_data;
1644             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1645         }
1646         if (srw_res->num_diagnostics == 0 && rr.record_data)
1647         {
1648             srw_res->record = yaz_srw_get_record(assoc->encode);
1649             srw_res->record->recordSchema = rr.record_schema;
1650             if (rr.record_packing)
1651             {
1652                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1653
1654                 if (pack == -1)
1655                 {
1656                     pack = Z_SRW_recordPacking_string;
1657                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1658                             rr.record_packing);
1659                 }
1660                 srw_res->record->recordPacking = pack;
1661             }
1662             srw_res->record->recordData_buf = rr.record_data;
1663             srw_res->record->recordData_len = strlen(rr.record_data);
1664             if (rr.extra_record_data)
1665             {
1666                 Z_SRW_extra_record *ex =
1667                     yaz_srw_get_extra_record(assoc->encode);
1668                 srw_res->extra_record = ex;
1669                 ex->extraRecordData_buf = rr.extra_record_data;
1670                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1671             }
1672         }
1673     }
1674 }
1675
1676 /* check if path is OK (1); BAD (0) */
1677 static int check_path(const char *path)
1678 {
1679     if (*path != '/')
1680         return 0;
1681     if (strstr(path, ".."))
1682         return 0;
1683     return 1;
1684 }
1685
1686 static char *read_file(const char *fname, ODR o, int *sz)
1687 {
1688     char *buf;
1689     FILE *inf = fopen(fname, "rb");
1690     if (!inf)
1691         return 0;
1692
1693     fseek(inf, 0L, SEEK_END);
1694     *sz = ftell(inf);
1695     rewind(inf);
1696     buf = odr_malloc(o, *sz);
1697     fread(buf, 1, *sz, inf);
1698     fclose(inf);
1699     return buf;
1700 }
1701
1702 static void process_http_request(association *assoc, request *req)
1703 {
1704     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1705     ODR o = assoc->encode;
1706     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1707     Z_SRW_PDU *sr = 0;
1708     Z_SOAP *soap_package = 0;
1709     Z_GDU *p = 0;
1710     char *charset = 0;
1711     Z_HTTP_Response *hres = 0;
1712     int keepalive = 1;
1713     const char *stylesheet = 0; /* for now .. set later */
1714     Z_SRW_diagnostic *diagnostic = 0;
1715     int num_diagnostic = 0;
1716     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1717
1718     if (!control_association(assoc, host, 0))
1719     {
1720         p = z_get_HTTP_Response(o, 404);
1721         r = 1;
1722     }
1723     if (r == 2 && assoc->server && assoc->server->docpath
1724         && hreq->path[0] == '/'
1725         &&
1726         /* check if path is a proper prefix of documentroot */
1727         strncmp(hreq->path+1, assoc->server->docpath,
1728                 strlen(assoc->server->docpath))
1729         == 0)
1730     {
1731         if (!check_path(hreq->path))
1732         {
1733             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1734             p = z_get_HTTP_Response(o, 404);
1735         }
1736         else
1737         {
1738             int content_size = 0;
1739             char *content_buf = read_file(hreq->path+1, o, &content_size);
1740             if (!content_buf)
1741             {
1742                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1743                 p = z_get_HTTP_Response(o, 404);
1744             }
1745             else
1746             {
1747                 const char *ctype = 0;
1748                 yaz_mime_types types = yaz_mime_types_create();
1749
1750                 yaz_mime_types_add(types, "xsl", "application/xml");
1751                 yaz_mime_types_add(types, "xml", "application/xml");
1752                 yaz_mime_types_add(types, "css", "text/css");
1753                 yaz_mime_types_add(types, "html", "text/html");
1754                 yaz_mime_types_add(types, "htm", "text/html");
1755                 yaz_mime_types_add(types, "txt", "text/plain");
1756                 yaz_mime_types_add(types, "js", "application/x-javascript");
1757
1758                 yaz_mime_types_add(types, "gif", "image/gif");
1759                 yaz_mime_types_add(types, "png", "image/png");
1760                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1761                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1762
1763                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1764                 if (!ctype)
1765                 {
1766                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1767                     p = z_get_HTTP_Response(o, 404);
1768                 }
1769                 else
1770                 {
1771                     p = z_get_HTTP_Response(o, 200);
1772                     hres = p->u.HTTP_Response;
1773                     hres->content_buf = content_buf;
1774                     hres->content_len = content_size;
1775                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1776                 }
1777                 yaz_mime_types_destroy(types);
1778             }
1779         }
1780         r = 1;
1781     }
1782
1783     if (r == 2)
1784     {
1785         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1786         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1787     }
1788     if (r == 2)  /* not taken */
1789     {
1790         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1791                            &diagnostic, &num_diagnostic);
1792         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1793     }
1794     if (r == 0)  /* decode SRW/SRU OK .. */
1795     {
1796         int http_code = 200;
1797         if (sr->which == Z_SRW_searchRetrieve_request)
1798         {
1799             Z_SRW_PDU *res =
1800                 yaz_srw_get(assoc->encode, Z_SRW_searchRetrieve_response);
1801
1802             stylesheet = sr->u.request->stylesheet;
1803             if (num_diagnostic)
1804             {
1805                 res->u.response->diagnostics = diagnostic;
1806                 res->u.response->num_diagnostics = num_diagnostic;
1807             }
1808             else
1809             {
1810                 srw_bend_search(assoc, req, sr, res->u.response,
1811                                 &http_code);
1812             }
1813             if (http_code == 200)
1814                 soap_package->u.generic->p = res;
1815         }
1816         else if (sr->which == Z_SRW_explain_request)
1817         {
1818             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
1819             stylesheet = sr->u.explain_request->stylesheet;
1820             if (num_diagnostic)
1821             {
1822                 res->u.explain_response->diagnostics = diagnostic;
1823                 res->u.explain_response->num_diagnostics = num_diagnostic;
1824             }
1825             srw_bend_explain(assoc, req, sr,
1826                              res->u.explain_response, &http_code);
1827             if (http_code == 200)
1828                 soap_package->u.generic->p = res;
1829         }
1830         else if (sr->which == Z_SRW_scan_request)
1831         {
1832             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_scan_response);
1833             stylesheet = sr->u.scan_request->stylesheet;
1834             if (num_diagnostic)
1835             {
1836                 res->u.scan_response->diagnostics = diagnostic;
1837                 res->u.scan_response->num_diagnostics = num_diagnostic;
1838             }
1839             srw_bend_scan(assoc, req, sr,
1840                           res->u.scan_response, &http_code);
1841             if (http_code == 200)
1842                 soap_package->u.generic->p = res;
1843         }
1844         else if (sr->which == Z_SRW_update_request)
1845         {
1846             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_update_response);
1847             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1848             if (num_diagnostic)
1849             {
1850                 res->u.update_response->diagnostics = diagnostic;
1851                 res->u.update_response->num_diagnostics = num_diagnostic;
1852             }
1853             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1854             srw_bend_update(assoc, req, sr,
1855                             res->u.update_response, &http_code);
1856             if (http_code == 200)
1857                 soap_package->u.generic->p = res;
1858         }
1859         else
1860         {
1861             yaz_log(log_request, "SOAP ERROR");
1862             /* FIXME - what error, what query */
1863             http_code = 500;
1864             z_soap_error(assoc->encode, soap_package,
1865                          "SOAP-ENV:Client", "Bad method", 0);
1866         }
1867         if (http_code == 200 || http_code == 500)
1868         {
1869             static Z_SOAP_Handler soap_handlers[4] = {
1870 #if YAZ_HAVE_XML2
1871                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1872                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1873                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1874 #endif
1875                 {0, 0, 0}
1876             };
1877             char ctype[60];
1878             int ret;
1879             p = z_get_HTTP_Response(o, 200);
1880             hres = p->u.HTTP_Response;
1881
1882             if (!stylesheet && assoc->server)
1883                 stylesheet = assoc->server->stylesheet;
1884
1885             /* empty stylesheet means NO stylesheet */
1886             if (stylesheet && *stylesheet == '\0')
1887                 stylesheet = 0;
1888
1889             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1890                                        &hres->content_buf, &hres->content_len,
1891                                        soap_handlers, charset, stylesheet);
1892             hres->code = http_code;
1893
1894             strcpy(ctype, "text/xml");
1895             if (charset)
1896             {
1897                 strcat(ctype, "; charset=");
1898                 strcat(ctype, charset);
1899             }
1900             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1901         }
1902         else
1903             p = z_get_HTTP_Response(o, http_code);
1904     }
1905
1906     if (p == 0)
1907         p = z_get_HTTP_Response(o, 500);
1908     hres = p->u.HTTP_Response;
1909     if (!strcmp(hreq->version, "1.0"))
1910     {
1911         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1912         if (v && !strcmp(v, "Keep-Alive"))
1913             keepalive = 1;
1914         else
1915             keepalive = 0;
1916         hres->version = "1.0";
1917     }
1918     else
1919     {
1920         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1921         if (v && !strcmp(v, "close"))
1922             keepalive = 0;
1923         else
1924             keepalive = 1;
1925         hres->version = "1.1";
1926     }
1927     if (!keepalive)
1928     {
1929         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1930         assoc->state = ASSOC_DEAD;
1931         assoc->cs_get_mask = 0;
1932     }
1933     else
1934     {
1935         int t;
1936         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1937
1938         if (alive && isdigit(*(const unsigned char *) alive))
1939             t = atoi(alive);
1940         else
1941             t = 15;
1942         if (t < 0 || t > 3600)
1943             t = 3600;
1944         iochan_settimeout(assoc->client_chan,t);
1945         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1946     }
1947     process_gdu_response(assoc, req, p);
1948 }
1949
1950 static void process_gdu_request(association *assoc, request *req)
1951 {
1952     if (req->gdu_request->which == Z_GDU_Z3950)
1953     {
1954         char *msg = 0;
1955         req->apdu_request = req->gdu_request->u.z3950;
1956         if (process_z_request(assoc, req, &msg) < 0)
1957             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1958     }
1959     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1960         process_http_request(assoc, req);
1961     else
1962     {
1963         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1964     }
1965 }
1966
1967 /*
1968  * Initiate request processing.
1969  */
1970 static int process_z_request(association *assoc, request *req, char **msg)
1971 {
1972     int fd = -1;
1973     Z_APDU *res;
1974     int retval;
1975
1976     *msg = "Unknown Error";
1977     assert(req && req->state == REQUEST_IDLE);
1978     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1979     {
1980         *msg = "Missing InitRequest";
1981         return -1;
1982     }
1983     switch (req->apdu_request->which)
1984     {
1985     case Z_APDU_initRequest:
1986         res = process_initRequest(assoc, req); break;
1987     case Z_APDU_searchRequest:
1988         res = process_searchRequest(assoc, req, &fd); break;
1989     case Z_APDU_presentRequest:
1990         res = process_presentRequest(assoc, req, &fd); break;
1991     case Z_APDU_scanRequest:
1992         if (assoc->init->bend_scan)
1993             res = process_scanRequest(assoc, req, &fd);
1994         else
1995         {
1996             *msg = "Cannot handle Scan APDU";
1997             return -1;
1998         }
1999         break;
2000     case Z_APDU_extendedServicesRequest:
2001         if (assoc->init->bend_esrequest)
2002             res = process_ESRequest(assoc, req, &fd);
2003         else
2004         {
2005             *msg = "Cannot handle Extended Services APDU";
2006             return -1;
2007         }
2008         break;
2009     case Z_APDU_sortRequest:
2010         if (assoc->init->bend_sort)
2011             res = process_sortRequest(assoc, req, &fd);
2012         else
2013         {
2014             *msg = "Cannot handle Sort APDU";
2015             return -1;
2016         }
2017         break;
2018     case Z_APDU_close:
2019         process_close(assoc, req);
2020         return 0;
2021     case Z_APDU_deleteResultSetRequest:
2022         if (assoc->init->bend_delete)
2023             res = process_deleteRequest(assoc, req, &fd);
2024         else
2025         {
2026             *msg = "Cannot handle Delete APDU";
2027             return -1;
2028         }
2029         break;
2030     case Z_APDU_segmentRequest:
2031         if (assoc->init->bend_segment)
2032         {
2033             res = process_segmentRequest (assoc, req);
2034         }
2035         else
2036         {
2037             *msg = "Cannot handle Segment APDU";
2038             return -1;
2039         }
2040         break;
2041     case Z_APDU_triggerResourceControlRequest:
2042         return 0;
2043     default:
2044         *msg = "Bad APDU received";
2045         return -1;
2046     }
2047     if (res)
2048     {
2049         yaz_log(YLOG_DEBUG, "  result immediately available");
2050         retval = process_z_response(assoc, req, res);
2051     }
2052     else if (fd < 0)
2053     {
2054         yaz_log(YLOG_DEBUG, "  result unavailble");
2055         retval = 0;
2056     }
2057     else /* no result yet - one will be provided later */
2058     {
2059         IOCHAN chan;
2060
2061         /* Set up an I/O handler for the fd supplied by the backend */
2062
2063         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2064         req->state = REQUEST_PENDING;
2065         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2066             abort();
2067         iochan_setdata(chan, assoc);
2068         retval = 0;
2069     }
2070     return retval;
2071 }
2072
2073 /*
2074  * Handle message from the backend.
2075  */
2076 void backend_response(IOCHAN i, int event)
2077 {
2078     association *assoc = (association *)iochan_getdata(i);
2079     request *req = request_head(&assoc->incoming);
2080     Z_APDU *res;
2081     int fd;
2082
2083     yaz_log(YLOG_DEBUG, "backend_response");
2084     assert(assoc && req && req->state != REQUEST_IDLE);
2085     /* determine what it is we're waiting for */
2086     switch (req->apdu_request->which)
2087     {
2088         case Z_APDU_searchRequest:
2089             res = response_searchRequest(assoc, req, 0, &fd); break;
2090 #if 0
2091         case Z_APDU_presentRequest:
2092             res = response_presentRequest(assoc, req, 0, &fd); break;
2093         case Z_APDU_scanRequest:
2094             res = response_scanRequest(assoc, req, 0, &fd); break;
2095 #endif
2096         default:
2097             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2098             abort();
2099     }
2100     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2101     {
2102         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2103         do_close(assoc, Z_Close_systemProblem, 0);
2104         iochan_destroy(i);
2105         return;
2106     }
2107     else if (!res) /* no result yet - try again later */
2108     {
2109         yaz_log(YLOG_DEBUG, "   no result yet");
2110         iochan_setfd(i, fd); /* in case fd has changed */
2111     }
2112 }
2113
2114 /*
2115  * Encode response, and transfer the request structure to the outgoing queue.
2116  */
2117 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2118 {
2119     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2120
2121     if (assoc->print)
2122     {
2123         if (!z_GDU(assoc->print, &res, 0, 0))
2124             yaz_log(YLOG_WARN, "ODR print error: %s",
2125                 odr_errmsg(odr_geterror(assoc->print)));
2126         odr_reset(assoc->print);
2127     }
2128     if (!z_GDU(assoc->encode, &res, 0, 0))
2129     {
2130         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2131                 odr_errmsg(odr_geterror(assoc->decode)),
2132                 odr_getelement(assoc->decode));
2133         return -1;
2134     }
2135     req->response = odr_getbuf(assoc->encode, &req->len_response,
2136         &req->size_response);
2137     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2138     odr_reset(assoc->encode);
2139     req->state = REQUEST_IDLE;
2140     request_enq(&assoc->outgoing, req);
2141     /* turn the work over to the ir_session handler */
2142     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2143     assoc->cs_put_mask = EVENT_OUTPUT;
2144     /* Is there more work to be done? give that to the input handler too */
2145     for (;;)
2146     {
2147         req = request_head(&assoc->incoming);
2148         if (req && req->state == REQUEST_IDLE)
2149         {
2150             request_deq(&assoc->incoming);
2151             process_gdu_request(assoc, req);
2152         }
2153         else
2154             break;
2155     }
2156     return 0;
2157 }
2158
2159 /*
2160  * Encode response, and transfer the request structure to the outgoing queue.
2161  */
2162 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2163 {
2164     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2165     gres->which = Z_GDU_Z3950;
2166     gres->u.z3950 = res;
2167
2168     return process_gdu_response(assoc, req, gres);
2169 }
2170
2171 static char *get_vhost(Z_OtherInformation *otherInfo)
2172 {
2173     return yaz_oi_get_string_oidval(&otherInfo, VAL_PROXY, 1, 0);
2174 }
2175
2176 /*
2177  * Handle init request.
2178  * At the moment, we don't check the options
2179  * anywhere else in the code - we just try not to do anything that would
2180  * break a naive client. We'll toss 'em into the association block when
2181  * we need them there.
2182  */
2183 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2184 {
2185     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2186     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2187     Z_InitResponse *resp = apdu->u.initResponse;
2188     bend_initresult *binitres;
2189     char *version;
2190     char options[140];
2191     statserv_options_block *cb = 0;  /* by default no control for backend */
2192
2193     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2194         cb = statserv_getcontrol();  /* got control block for backend */
2195
2196     if (cb && assoc->backend)
2197         (*cb->bend_close)(assoc->backend);
2198
2199     yaz_log(log_requestdetail, "Got initRequest");
2200     if (req->implementationId)
2201         yaz_log(log_requestdetail, "Id:        %s",
2202                 req->implementationId);
2203     if (req->implementationName)
2204         yaz_log(log_requestdetail, "Name:      %s",
2205                 req->implementationName);
2206     if (req->implementationVersion)
2207         yaz_log(log_requestdetail, "Version:   %s",
2208                 req->implementationVersion);
2209
2210     assoc_init_reset(assoc);
2211
2212     assoc->init->auth = req->idAuthentication;
2213     assoc->init->referenceId = req->referenceId;
2214
2215     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2216     {
2217         Z_CharSetandLanguageNegotiation *negotiation =
2218             yaz_get_charneg_record (req->otherInfo);
2219         if (negotiation &&
2220             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2221             assoc->init->charneg_request = negotiation;
2222     }
2223
2224     assoc->backend = 0;
2225     if (cb)
2226     {
2227         if (req->implementationVersion)
2228             yaz_log(log_requestdetail, "Config:    %s",
2229                     cb->configname);
2230
2231         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2232
2233         /* we have a backend control block, so call that init function */
2234         if (!(binitres = (*cb->bend_init)(assoc->init)))
2235         {
2236             yaz_log(YLOG_WARN, "Bad response from backend.");
2237             return 0;
2238         }
2239         assoc->backend = binitres->handle;
2240     }
2241     else
2242     {
2243         /* no backend. return error */
2244         binitres = odr_malloc(assoc->encode, sizeof(*binitres));
2245         binitres->errstring = 0;
2246         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2247         iochan_settimeout(assoc->client_chan, 10);
2248     }
2249     if ((assoc->init->bend_sort))
2250         yaz_log (YLOG_DEBUG, "Sort handler installed");
2251     if ((assoc->init->bend_search))
2252         yaz_log (YLOG_DEBUG, "Search handler installed");
2253     if ((assoc->init->bend_present))
2254         yaz_log (YLOG_DEBUG, "Present handler installed");
2255     if ((assoc->init->bend_esrequest))
2256         yaz_log (YLOG_DEBUG, "ESRequest handler installed");
2257     if ((assoc->init->bend_delete))
2258         yaz_log (YLOG_DEBUG, "Delete handler installed");
2259     if ((assoc->init->bend_scan))
2260         yaz_log (YLOG_DEBUG, "Scan handler installed");
2261     if ((assoc->init->bend_segment))
2262         yaz_log (YLOG_DEBUG, "Segment handler installed");
2263
2264     resp->referenceId = req->referenceId;
2265     *options = '\0';
2266     /* let's tell the client what we can do */
2267     if (ODR_MASK_GET(req->options, Z_Options_search))
2268     {
2269         ODR_MASK_SET(resp->options, Z_Options_search);
2270         strcat(options, "srch");
2271     }
2272     if (ODR_MASK_GET(req->options, Z_Options_present))
2273     {
2274         ODR_MASK_SET(resp->options, Z_Options_present);
2275         strcat(options, " prst");
2276     }
2277     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2278         assoc->init->bend_delete)
2279     {
2280         ODR_MASK_SET(resp->options, Z_Options_delSet);
2281         strcat(options, " del");
2282     }
2283     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2284         assoc->init->bend_esrequest)
2285     {
2286         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2287         strcat (options, " extendedServices");
2288     }
2289     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2290     {
2291         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2292         strcat(options, " namedresults");
2293     }
2294     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2295     {
2296         ODR_MASK_SET(resp->options, Z_Options_scan);
2297         strcat(options, " scan");
2298     }
2299     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2300     {
2301         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2302         strcat(options, " concurrop");
2303     }
2304     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2305     {
2306         ODR_MASK_SET(resp->options, Z_Options_sort);
2307         strcat(options, " sort");
2308     }
2309
2310     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
2311         && assoc->init->charneg_response)
2312     {
2313         Z_OtherInformation **p;
2314         Z_OtherInformationUnit *p0;
2315
2316         yaz_oi_APDU(apdu, &p);
2317
2318         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
2319             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2320
2321             p0->which = Z_OtherInfo_externallyDefinedInfo;
2322             p0->information.externallyDefinedInfo =
2323                 assoc->init->charneg_response;
2324         }
2325         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2326         strcat(options, " negotiation");
2327     }
2328
2329     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2330         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2331
2332     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2333     {
2334         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2335         assoc->version = 1; /* 1 & 2 are equivalent */
2336     }
2337     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2338     {
2339         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2340         assoc->version = 2;
2341     }
2342     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2343     {
2344         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2345         assoc->version = 3;
2346     }
2347
2348     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2349
2350     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2351         assoc->maximumRecordSize = *req->maximumRecordSize;
2352
2353     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2354         assoc->preferredMessageSize = *req->preferredMessageSize;
2355
2356     resp->preferredMessageSize = &assoc->preferredMessageSize;
2357     resp->maximumRecordSize = &assoc->maximumRecordSize;
2358
2359     resp->implementationId = odr_prepend(assoc->encode,
2360                 assoc->init->implementation_id,
2361                 resp->implementationId);
2362
2363     resp->implementationName = odr_prepend(assoc->encode,
2364                 assoc->init->implementation_name,
2365                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2366
2367     version = odr_strdup(assoc->encode, "$Revision: 1.111 $");
2368     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2369         version[strlen(version)-2] = '\0';
2370     resp->implementationVersion = odr_prepend(assoc->encode,
2371                 assoc->init->implementation_version,
2372                 odr_prepend(assoc->encode, &version[11],
2373                             resp->implementationVersion));
2374
2375     if (binitres->errcode)
2376     {
2377         assoc->state = ASSOC_DEAD;
2378         resp->userInformationField =
2379             init_diagnostics(assoc->encode, binitres->errcode,
2380                              binitres->errstring);
2381         *resp->result = 0;
2382     }
2383     if (log_request)
2384     {
2385         if (!req->idAuthentication)
2386             yaz_log(log_request, "Auth none");
2387         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2388         {
2389             const char *open = req->idAuthentication->u.open;
2390             const char *slash = strchr(open, '/');
2391             int len;
2392             if (slash)
2393                 len = slash - open;
2394             else
2395                 len = strlen(open);
2396                 yaz_log(log_request, "Auth open %.*s", len, open);
2397         }
2398         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2399         {
2400             const char *user = req->idAuthentication->u.idPass->userId;
2401             const char *group = req->idAuthentication->u.idPass->groupId;
2402             yaz_log(log_request, "Auth idPass %s %s",
2403                     user ? user : "-", group ? group : "-");
2404         }
2405         else if (req->idAuthentication->which
2406                  == Z_IdAuthentication_anonymous)
2407         {
2408             yaz_log(log_request, "Auth anonymous");
2409         }
2410         else
2411         {
2412             yaz_log(log_request, "Auth other");
2413         }
2414     }
2415     if (log_request)
2416     {
2417         WRBUF wr = wrbuf_alloc();
2418         wrbuf_printf(wr, "Init ");
2419         if (binitres->errcode)
2420             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2421         else
2422             wrbuf_printf(wr, "OK -");
2423         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2424                      (req->implementationId ? req->implementationId :"-"),
2425                      (req->implementationName ?
2426                       req->implementationName : "-"),
2427                      (req->implementationVersion ?
2428                       req->implementationVersion : "-")
2429             );
2430         yaz_log(log_request, "%s", wrbuf_buf(wr));
2431         wrbuf_free(wr, 1);
2432     }
2433     return apdu;
2434 }
2435
2436 /*
2437  * Set the specified `errcode' and `errstring' into a UserInfo-1
2438  * external to be returned to the client in accordance with Z35.90
2439  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2440  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2441  */
2442 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2443 {
2444     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2445         addinfo ? " -- " : "", addinfo ? addinfo : "");
2446     return zget_init_diagnostics(odr, error, addinfo);
2447 }
2448
2449 /*
2450  * nonsurrogate diagnostic record.
2451  */
2452 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2453 {
2454     Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec));
2455
2456     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2457             addinfo ? " -- " : "", addinfo ? addinfo : "");
2458
2459     rec->which = Z_Records_NSD;
2460     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2461                                                            error, addinfo);
2462     return rec;
2463 }
2464
2465 /*
2466  * surrogate diagnostic.
2467  */
2468 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2469                                           const char *dbname,
2470                                           int error, const char *addinfo)
2471 {
2472     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2473             addinfo ? " -- " : "", addinfo ? addinfo : "");
2474     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2475 }
2476
2477 static Z_Records *pack_records(association *a, char *setname, int start,
2478                                int *num, Z_RecordComposition *comp,
2479                                int *next, int *pres, oid_value format,
2480                                Z_ReferenceId *referenceId,
2481                                int *oid, int *errcode)
2482 {
2483     int recno, total_length = 0, toget = *num, dumped_records = 0;
2484     Z_Records *records =
2485         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
2486     Z_NamePlusRecordList *reclist =
2487         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
2488     Z_NamePlusRecord **list =
2489         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
2490
2491     records->which = Z_Records_DBOSD;
2492     records->u.databaseOrSurDiagnostics = reclist;
2493     reclist->num_records = 0;
2494     reclist->records = list;
2495     *pres = Z_PresentStatus_success;
2496     *num = 0;
2497     *next = 0;
2498
2499     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2500     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2501         a->maximumRecordSize);
2502     for (recno = start; reclist->num_records < toget; recno++)
2503     {
2504         bend_fetch_rr freq;
2505         Z_NamePlusRecord *thisrec;
2506         int this_length = 0;
2507         /*
2508          * we get the number of bytes allocated on the stream before any
2509          * allocation done by the backend - this should give us a reasonable
2510          * idea of the total size of the data so far.
2511          */
2512         total_length = odr_total(a->encode) - dumped_records;
2513         freq.errcode = 0;
2514         freq.errstring = 0;
2515         freq.basename = 0;
2516         freq.len = 0;
2517         freq.record = 0;
2518         freq.last_in_set = 0;
2519         freq.setname = setname;
2520         freq.surrogate_flag = 0;
2521         freq.number = recno;
2522         freq.comp = comp;
2523         freq.request_format = format;
2524         freq.request_format_raw = oid;
2525         freq.output_format = format;
2526         freq.output_format_raw = 0;
2527         freq.stream = a->encode;
2528         freq.print = a->print;
2529         freq.referenceId = referenceId;
2530         freq.schema = 0;
2531
2532         retrieve_fetch(a, &freq);
2533
2534         *next = freq.last_in_set ? 0 : recno + 1;
2535
2536         /* backend should be able to signal whether error is system-wide
2537            or only pertaining to current record */
2538         if (freq.errcode)
2539         {
2540             if (!freq.surrogate_flag)
2541             {
2542                 char s[20];
2543                 *pres = Z_PresentStatus_failure;
2544                 /* for 'present request out of range',
2545                    set addinfo to record position if not set */
2546                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2547                                 freq.errstring == 0)
2548                 {
2549                     sprintf (s, "%d", recno);
2550                     freq.errstring = s;
2551                 }
2552                 if (errcode)
2553                     *errcode = freq.errcode;
2554                 return diagrec(a, freq.errcode, freq.errstring);
2555             }
2556             reclist->records[reclist->num_records] =
2557                 surrogatediagrec(a, freq.basename, freq.errcode,
2558                                  freq.errstring);
2559             reclist->num_records++;
2560             continue;
2561         }
2562         if (freq.record == 0)  /* no error and no record ? */
2563         {
2564             *next = 0;   /* signal end-of-set and stop */
2565             break;
2566         }
2567         if (freq.len >= 0)
2568             this_length = freq.len;
2569         else
2570             this_length = odr_total(a->encode) - total_length - dumped_records;
2571         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2572             this_length, total_length, dumped_records);
2573         if (a->preferredMessageSize > 0 &&
2574                 this_length + total_length > a->preferredMessageSize)
2575         {
2576             /* record is small enough, really */
2577             if (this_length <= a->preferredMessageSize && recno > start)
2578             {
2579                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2580                 *pres = Z_PresentStatus_partial_2;
2581                 break;
2582             }
2583             /* record can only be fetched by itself */
2584             if (this_length < a->maximumRecordSize)
2585             {
2586                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2587                 if (toget > 1)
2588                 {
2589                     yaz_log(YLOG_DEBUG, "  Dropped it");
2590                     reclist->records[reclist->num_records] =
2591                          surrogatediagrec(a, freq.basename, 16, 0);
2592                     reclist->num_records++;
2593                     dumped_records += this_length;
2594                     continue;
2595                 }
2596             }
2597             else /* too big entirely */
2598             {
2599                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2600                         this_length, a->maximumRecordSize);
2601                 reclist->records[reclist->num_records] =
2602                     surrogatediagrec(a, freq.basename, 17, 0);
2603                 reclist->num_records++;
2604                 dumped_records += this_length;
2605                 continue;
2606             }
2607         }
2608
2609         if (!(thisrec = (Z_NamePlusRecord *)
2610               odr_malloc(a->encode, sizeof(*thisrec))))
2611             return 0;
2612         if (freq.basename)
2613             thisrec->databaseName = odr_strdup(a->encode, freq.basename);
2614         else
2615             thisrec->databaseName = 0;
2616         thisrec->which = Z_NamePlusRecord_databaseRecord;
2617
2618         if (freq.output_format_raw)
2619         {
2620             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
2621             freq.output_format = ident->value;
2622         }
2623         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
2624                                                  freq.record, freq.len);
2625         if (!thisrec->u.databaseRecord)
2626             return 0;
2627         reclist->records[reclist->num_records] = thisrec;
2628         reclist->num_records++;
2629     }
2630     *num = reclist->num_records;
2631     return records;
2632 }
2633
2634 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2635     int *fd)
2636 {
2637     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2638     bend_search_rr *bsrr =
2639         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
2640
2641     yaz_log(log_requestdetail, "Got SearchRequest.");
2642     bsrr->fd = fd;
2643     bsrr->request = reqb;
2644     bsrr->association = assoc;
2645     bsrr->referenceId = req->referenceId;
2646     save_referenceId (reqb, bsrr->referenceId);
2647     bsrr->srw_sortKeys = 0;
2648     bsrr->srw_setname = 0;
2649     bsrr->srw_setnameIdleTime = 0;
2650     bsrr->estimated_hit_count = 0;
2651     bsrr->partial_resultset = 0;
2652
2653     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2654     if (req->databaseNames)
2655     {
2656         int i;
2657         for (i = 0; i < req->num_databaseNames; i++)
2658             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2659     }
2660
2661     yaz_log_zquery_level(log_requestdetail,req->query);
2662
2663     if (assoc->init->bend_search)
2664     {
2665         bsrr->setname = req->resultSetName;
2666         bsrr->replace_set = *req->replaceIndicator;
2667         bsrr->num_bases = req->num_databaseNames;
2668         bsrr->basenames = req->databaseNames;
2669         bsrr->query = req->query;
2670         bsrr->stream = assoc->encode;
2671         nmem_transfer(bsrr->stream->mem, reqb->request_mem);
2672         bsrr->decode = assoc->decode;
2673         bsrr->print = assoc->print;
2674         bsrr->hits = 0;
2675         bsrr->errcode = 0;
2676         bsrr->errstring = NULL;
2677         bsrr->search_info = NULL;
2678
2679         if (assoc->server && assoc->server->cql_transform
2680             && req->query->which == Z_Query_type_104
2681             && req->query->u.type_104->which == Z_External_CQL)
2682         {
2683             /* have a CQL query and a CQL to PQF transform .. */
2684             int srw_errcode =
2685                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2686                         assoc->server->cql_transform, bsrr->query);
2687             if (srw_errcode)
2688                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2689         }
2690         if (!bsrr->errcode)
2691             (assoc->init->bend_search)(assoc->backend, bsrr);
2692         if (!bsrr->request)  /* backend not ready with the search response */
2693             return 0;  /* should not be used any more */
2694     }
2695     else
2696     {
2697         /* FIXME - make a diagnostic for it */
2698         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2699     }
2700     return response_searchRequest(assoc, reqb, bsrr, fd);
2701 }
2702
2703 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2704
2705 /*
2706  * Prepare a searchresponse based on the backend results. We probably want
2707  * to look at making the fetching of records nonblocking as well, but
2708  * so far, we'll keep things simple.
2709  * If bsrt is null, that means we're called in response to a communications
2710  * event, and we'll have to get the response for ourselves.
2711  */
2712 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2713     bend_search_rr *bsrt, int *fd)
2714 {
2715     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2716     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2717     Z_SearchResponse *resp = (Z_SearchResponse *)
2718         odr_malloc (assoc->encode, sizeof(*resp));
2719     int *nulint = odr_intdup (assoc->encode, 0);
2720     int *next = odr_intdup(assoc->encode, 0);
2721     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2722     int returnedrecs = 0;
2723
2724     apdu->which = Z_APDU_searchResponse;
2725     apdu->u.searchResponse = resp;
2726     resp->referenceId = req->referenceId;
2727     resp->additionalSearchInfo = 0;
2728     resp->otherInfo = 0;
2729     *fd = -1;
2730     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2731     {
2732         yaz_log(YLOG_FATAL, "Bad result from backend");
2733         return 0;
2734     }
2735     else if (bsrt->errcode)
2736     {
2737         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2738         resp->resultCount = nulint;
2739         resp->numberOfRecordsReturned = nulint;
2740         resp->nextResultSetPosition = nulint;
2741         resp->searchStatus = nulint;
2742         resp->resultSetStatus = none;
2743         resp->presentStatus = 0;
2744     }
2745     else
2746     {
2747         bool_t *sr = odr_intdup(assoc->encode, 1);
2748         int *toget = odr_intdup(assoc->encode, 0);
2749         Z_RecordComposition comp, *compp = 0;
2750
2751         yaz_log (log_requestdetail, "resultCount: %d", bsrt->hits);
2752
2753         resp->records = 0;
2754         resp->resultCount = &bsrt->hits;
2755
2756         comp.which = Z_RecordComp_simple;
2757         /* how many records does the user agent want, then? */
2758         if (bsrt->hits <= *req->smallSetUpperBound)
2759         {
2760             *toget = bsrt->hits;
2761             if ((comp.u.simple = req->smallSetElementSetNames))
2762                 compp = &comp;
2763         }
2764         else if (bsrt->hits < *req->largeSetLowerBound)
2765         {
2766             *toget = *req->mediumSetPresentNumber;
2767             if (*toget > bsrt->hits)
2768                 *toget = bsrt->hits;
2769             if ((comp.u.simple = req->mediumSetElementSetNames))
2770                 compp = &comp;
2771         }
2772         else
2773             *toget = 0;
2774
2775         if (*toget && !resp->records)
2776         {
2777             oident *prefformat;
2778             oid_value form;
2779             int *presst = odr_intdup(assoc->encode, 0);
2780
2781             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2782                 form = VAL_NONE;
2783             else
2784                 form = prefformat->value;
2785
2786             /* Call bend_present if defined */
2787             if (assoc->init->bend_present)
2788             {
2789                 bend_present_rr *bprr = (bend_present_rr *)
2790                     nmem_malloc (reqb->request_mem, sizeof(*bprr));
2791                 bprr->setname = req->resultSetName;
2792                 bprr->start = 1;
2793                 bprr->number = *toget;
2794                 bprr->format = form;
2795                 bprr->comp = compp;
2796                 bprr->referenceId = req->referenceId;
2797                 bprr->stream = assoc->encode;
2798                 bprr->print = assoc->print;
2799                 bprr->request = reqb;
2800                 bprr->association = assoc;
2801                 bprr->errcode = 0;
2802                 bprr->errstring = NULL;
2803                 (*assoc->init->bend_present)(assoc->backend, bprr);
2804
2805                 if (!bprr->request)
2806                     return 0;
2807                 if (bprr->errcode)
2808                 {
2809                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2810                     *resp->presentStatus = Z_PresentStatus_failure;
2811                 }
2812             }
2813
2814             if (!resp->records)
2815                 resp->records = pack_records(assoc, req->resultSetName, 1,
2816                                              toget, compp, next, presst, form, req->referenceId,
2817                                              req->preferredRecordSyntax, NULL);
2818             if (!resp->records)
2819                 return 0;
2820             resp->numberOfRecordsReturned = toget;
2821             returnedrecs = *toget;
2822             resp->presentStatus = presst;
2823         }
2824         else
2825         {
2826             if (*resp->resultCount)
2827                 *next = 1;
2828             resp->numberOfRecordsReturned = nulint;
2829             resp->presentStatus = 0;
2830         }
2831         resp->nextResultSetPosition = next;
2832         resp->searchStatus = sr;
2833         resp->resultSetStatus = 0;
2834         if (bsrt->estimated_hit_count)
2835         {
2836             resp->resultSetStatus = odr_intdup(assoc->encode,
2837                                                Z_SearchResponse_estimate);
2838         }
2839         else if (bsrt->partial_resultset)
2840         {
2841             resp->resultSetStatus = odr_intdup(assoc->encode,
2842                                                Z_SearchResponse_subset);
2843         }
2844     }
2845     resp->additionalSearchInfo = bsrt->search_info;
2846
2847     if (log_request)
2848     {
2849         int i;
2850         WRBUF wr = wrbuf_alloc();
2851
2852         for (i = 0 ; i < req->num_databaseNames; i++){
2853             if (i)
2854                 wrbuf_printf(wr, "+");
2855             wrbuf_printf(wr, req->databaseNames[i]);
2856         }
2857         wrbuf_printf(wr, " ");
2858
2859         if (bsrt->errcode)
2860             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2861         else
2862             wrbuf_printf(wr, "OK %d", bsrt->hits);
2863         wrbuf_printf(wr, " %s 1+%d ",
2864                      req->resultSetName, returnedrecs);
2865         yaz_query_to_wrbuf(wr, req->query);
2866
2867         yaz_log(log_request, "Search %s", wrbuf_buf(wr));
2868         wrbuf_free(wr, 1);
2869     }
2870     return apdu;
2871 }
2872
2873 /*
2874  * Maybe we got a little over-friendly when we designed bend_fetch to
2875  * get only one record at a time. Some backends can optimise multiple-record
2876  * fetches, and at any rate, there is some overhead involved in
2877  * all that selecting and hopping around. Problem is, of course, that the
2878  * frontend can't know ahead of time how many records it'll need to
2879  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2880  * is downright lousy as a bulk data transfer protocol.
2881  *
2882  * To start with, we'll do the fetching of records from the backend
2883  * in one operation: To save some trips in and out of the event-handler,
2884  * and to simplify the interface to pack_records. At any rate, asynch
2885  * operation is more fun in operations that have an unpredictable execution
2886  * speed - which is normally more true for search than for present.
2887  */
2888 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2889                                       int *fd)
2890 {
2891     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2892     oident *prefformat;
2893     oid_value form;
2894     Z_APDU *apdu;
2895     Z_PresentResponse *resp;
2896     int *next;
2897     int *num;
2898     int errcode = 0;
2899     const char *errstring = 0;
2900
2901     yaz_log(log_requestdetail, "Got PresentRequest.");
2902
2903     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2904         form = VAL_NONE;
2905     else
2906         form = prefformat->value;
2907     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2908     resp->records = 0;
2909     resp->presentStatus = odr_intdup(assoc->encode, 0);
2910     if (assoc->init->bend_present)
2911     {
2912         bend_present_rr *bprr = (bend_present_rr *)
2913             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2914         bprr->setname = req->resultSetId;
2915         bprr->start = *req->resultSetStartPoint;
2916         bprr->number = *req->numberOfRecordsRequested;
2917         bprr->format = form;
2918         bprr->comp = req->recordComposition;
2919         bprr->referenceId = req->referenceId;
2920         bprr->stream = assoc->encode;
2921         bprr->print = assoc->print;
2922         bprr->request = reqb;
2923         bprr->association = assoc;
2924         bprr->errcode = 0;
2925         bprr->errstring = NULL;
2926         (*assoc->init->bend_present)(assoc->backend, bprr);
2927
2928         if (!bprr->request)
2929             return 0; /* should not happen */
2930         if (bprr->errcode)
2931         {
2932             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2933             *resp->presentStatus = Z_PresentStatus_failure;
2934             errcode = bprr->errcode;
2935             errstring = bprr->errstring;
2936         }
2937     }
2938     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2939     next = odr_intdup(assoc->encode, 0);
2940     num = odr_intdup(assoc->encode, 0);
2941
2942     apdu->which = Z_APDU_presentResponse;
2943     apdu->u.presentResponse = resp;
2944     resp->referenceId = req->referenceId;
2945     resp->otherInfo = 0;
2946
2947     if (!resp->records)
2948     {
2949         *num = *req->numberOfRecordsRequested;
2950         resp->records =
2951             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2952                          num, req->recordComposition, next,
2953                          resp->presentStatus,
2954                          form, req->referenceId, req->preferredRecordSyntax,
2955                          &errcode);
2956     }
2957     if (log_request)
2958     {
2959         WRBUF wr = wrbuf_alloc();
2960         wrbuf_printf(wr, "Present ");
2961
2962         if (*resp->presentStatus == Z_PresentStatus_failure)
2963             wrbuf_printf(wr, "ERROR %d ", errcode);
2964         else if (*resp->presentStatus == Z_PresentStatus_success)
2965             wrbuf_printf(wr, "OK -  ");
2966         else
2967             wrbuf_printf(wr, "Partial %d - ", *resp->presentStatus);
2968
2969         wrbuf_printf(wr, " %s %d+%d ",
2970                 req->resultSetId, *req->resultSetStartPoint,
2971                 *req->numberOfRecordsRequested);
2972         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2973         wrbuf_free(wr, 1);
2974     }
2975     if (!resp->records)
2976         return 0;
2977     resp->numberOfRecordsReturned = num;
2978     resp->nextResultSetPosition = next;
2979
2980     return apdu;
2981 }
2982
2983 /*
2984  * Scan was implemented rather in a hurry, and with support for only the basic
2985  * elements of the service in the backend API. Suggestions are welcome.
2986  */
2987 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2988 {
2989     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2990     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2991     Z_ScanResponse *res = (Z_ScanResponse *)
2992         odr_malloc (assoc->encode, sizeof(*res));
2993     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2994     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2995     Z_ListEntries *ents = (Z_ListEntries *)
2996         odr_malloc (assoc->encode, sizeof(*ents));
2997     Z_DiagRecs *diagrecs_p = NULL;
2998     oident *attset;
2999     bend_scan_rr *bsrr = (bend_scan_rr *)
3000         odr_malloc (assoc->encode, sizeof(*bsrr));
3001     struct scan_entry *save_entries;
3002
3003     yaz_log(log_requestdetail, "Got ScanRequest");
3004
3005     apdu->which = Z_APDU_scanResponse;
3006     apdu->u.scanResponse = res;
3007     res->referenceId = req->referenceId;
3008
3009     /* if step is absent, set it to 0 */
3010     res->stepSize = odr_intdup(assoc->encode, 0);
3011     if (req->stepSize)
3012         *res->stepSize = *req->stepSize;
3013
3014     res->scanStatus = scanStatus;
3015     res->numberOfEntriesReturned = numberOfEntriesReturned;
3016     res->positionOfTerm = 0;
3017     res->entries = ents;
3018     ents->num_entries = 0;
3019     ents->entries = NULL;
3020     ents->num_nonsurrogateDiagnostics = 0;
3021     ents->nonsurrogateDiagnostics = NULL;
3022     res->attributeSet = 0;
3023     res->otherInfo = 0;
3024
3025     if (req->databaseNames)
3026     {
3027         int i;
3028         for (i = 0; i < req->num_databaseNames; i++)
3029             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
3030     }
3031     bsrr->scanClause = 0;
3032     bsrr->errcode = 0;
3033     bsrr->errstring = 0;
3034     bsrr->num_bases = req->num_databaseNames;
3035     bsrr->basenames = req->databaseNames;
3036     bsrr->num_entries = *req->numberOfTermsRequested;
3037     bsrr->term = req->termListAndStartPoint;
3038     bsrr->referenceId = req->referenceId;
3039     bsrr->stream = assoc->encode;
3040     bsrr->print = assoc->print;
3041     bsrr->step_size = res->stepSize;
3042     bsrr->entries = 0;
3043     /* For YAZ 2.0 and earlier it was the backend handler that
3044        initialized entries (member display_term did not exist)
3045        YAZ 2.0 and later sets 'entries'  and initialize all members
3046        including 'display_term'. If YAZ 2.0 or later sees that
3047        entries was modified - we assume that it is an old handler and
3048        that 'display_term' is _not_ set.
3049     */
3050     if (bsrr->num_entries > 0)
3051     {
3052         int i;
3053         bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3054                                    bsrr->num_entries);
3055         for (i = 0; i<bsrr->num_entries; i++)
3056         {
3057             bsrr->entries[i].term = 0;
3058             bsrr->entries[i].occurrences = 0;
3059             bsrr->entries[i].errcode = 0;
3060             bsrr->entries[i].errstring = 0;
3061             bsrr->entries[i].display_term = 0;
3062         }
3063     }
3064     save_entries = bsrr->entries;  /* save it so we can compare later */
3065
3066     if (req->attributeSet &&
3067         (attset = oid_getentbyoid(req->attributeSet)) &&
3068         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
3069         bsrr->attributeset = attset->value;
3070     else
3071         bsrr->attributeset = VAL_NONE;
3072     log_scan_term_level (log_requestdetail, req->termListAndStartPoint,
3073             bsrr->attributeset);
3074     bsrr->term_position = req->preferredPositionInResponse ?
3075         *req->preferredPositionInResponse : 1;
3076
3077     ((int (*)(void *, bend_scan_rr *))
3078      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3079
3080     if (bsrr->errcode)
3081         diagrecs_p = zget_DiagRecs(assoc->encode,
3082                                    bsrr->errcode, bsrr->errstring);
3083     else
3084     {
3085         int i;
3086         Z_Entry **tab = (Z_Entry **)
3087             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
3088
3089         if (bsrr->status == BEND_SCAN_PARTIAL)
3090             *scanStatus = Z_Scan_partial_5;
3091         else
3092             *scanStatus = Z_Scan_success;
3093         ents->entries = tab;
3094         ents->num_entries = bsrr->num_entries;
3095         res->numberOfEntriesReturned = &ents->num_entries;
3096         res->positionOfTerm = &bsrr->term_position;
3097         for (i = 0; i < bsrr->num_entries; i++)
3098         {
3099             Z_Entry *e;
3100             Z_TermInfo *t;
3101             Odr_oct *o;
3102
3103             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3104             if (bsrr->entries[i].occurrences >= 0)
3105             {
3106                 e->which = Z_Entry_termInfo;
3107                 e->u.termInfo = t = (Z_TermInfo *)
3108                     odr_malloc(assoc->encode, sizeof(*t));
3109                 t->suggestedAttributes = 0;
3110                 t->displayTerm = 0;
3111                 if (save_entries == bsrr->entries &&
3112                     bsrr->entries[i].display_term)
3113                 {
3114                     /* the entries was _not_ set by the handler. So it's
3115                        safe to test for new member display_term. It is
3116                        NULL'ed by us.
3117                     */
3118                     t->displayTerm = odr_strdup(assoc->encode,
3119                                                 bsrr->entries[i].display_term);
3120                 }
3121                 t->alternativeTerm = 0;
3122                 t->byAttributes = 0;
3123                 t->otherTermInfo = 0;
3124                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3125                 t->term = (Z_Term *)
3126                     odr_malloc(assoc->encode, sizeof(*t->term));
3127                 t->term->which = Z_Term_general;
3128                 t->term->u.general = o =
3129                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3130                 o->buf = (unsigned char *)
3131                     odr_malloc(assoc->encode, o->len = o->size =
3132                                strlen(bsrr->entries[i].term));
3133                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3134                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3135                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3136             }
3137             else
3138             {
3139                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3140                                                   bsrr->entries[i].errcode,
3141                                                   bsrr->entries[i].errstring);
3142                 assert (drecs->num_diagRecs == 1);
3143                 e->which = Z_Entry_surrogateDiagnostic;
3144                 assert (drecs->diagRecs[0]);
3145                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3146             }
3147         }
3148     }
3149     if (diagrecs_p)
3150     {
3151         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3152         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3153     }
3154     if (log_request)
3155     {
3156         int i;
3157         WRBUF wr = wrbuf_alloc();
3158         wrbuf_printf(wr, "Scan ");
3159         for (i = 0 ; i < req->num_databaseNames; i++){
3160             if (i)
3161                 wrbuf_printf(wr, "+");
3162             wrbuf_printf(wr, req->databaseNames[i]);
3163         }
3164         wrbuf_printf(wr, " ");
3165
3166         if (bsrr->errcode){
3167             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3168             wrbuf_printf(wr, " ");
3169         }
3170         else
3171             wrbuf_printf(wr, "OK ");
3172         /* else if (*res->scanStatus == Z_Scan_success) */
3173         /*    wrbuf_printf(wr, "OK "); */
3174         /* else */
3175         /* wrbuf_printf(wr, "Partial "); */
3176
3177         if (*res->numberOfEntriesReturned)
3178             wrbuf_printf(wr, "%d - ", *res->numberOfEntriesReturned);
3179         else
3180             wrbuf_printf(wr, "0 - ");
3181
3182         wrbuf_printf(wr, "%d+%d+%d ",
3183                      (req->preferredPositionInResponse ?
3184                       *req->preferredPositionInResponse : 1),
3185                      *req->numberOfTermsRequested,
3186                      (res->stepSize ? *res->stepSize : 1));
3187
3188         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3189                           bsrr->attributeset);
3190         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3191         wrbuf_free(wr, 1);
3192     }
3193     return apdu;
3194 }
3195
3196 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3197     int *fd)
3198 {
3199     int i;
3200     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3201     Z_SortResponse *res = (Z_SortResponse *)
3202         odr_malloc (assoc->encode, sizeof(*res));
3203     bend_sort_rr *bsrr = (bend_sort_rr *)
3204         odr_malloc (assoc->encode, sizeof(*bsrr));
3205
3206     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3207
3208     yaz_log(log_requestdetail, "Got SortRequest.");
3209
3210     bsrr->num_input_setnames = req->num_inputResultSetNames;
3211     for (i=0;i<req->num_inputResultSetNames;i++)
3212         yaz_log(log_requestdetail, "Input resultset: '%s'",
3213                 req->inputResultSetNames[i]);
3214     bsrr->input_setnames = req->inputResultSetNames;
3215     bsrr->referenceId = req->referenceId;
3216     bsrr->output_setname = req->sortedResultSetName;
3217     yaz_log(log_requestdetail, "Output resultset: '%s'",
3218                 req->sortedResultSetName);
3219     bsrr->sort_sequence = req->sortSequence;
3220        /*FIXME - dump those sequences too */
3221     bsrr->stream = assoc->encode;
3222     bsrr->print = assoc->print;
3223
3224     bsrr->sort_status = Z_SortResponse_failure;
3225     bsrr->errcode = 0;
3226     bsrr->errstring = 0;
3227
3228     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3229
3230     res->referenceId = bsrr->referenceId;
3231     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3232     res->resultSetStatus = 0;
3233     if (bsrr->errcode)
3234     {
3235         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3236                                        bsrr->errcode, bsrr->errstring);
3237         res->diagnostics = dr->diagRecs;
3238         res->num_diagnostics = dr->num_diagRecs;
3239     }
3240     else
3241     {
3242         res->num_diagnostics = 0;
3243         res->diagnostics = 0;
3244     }
3245     res->resultCount = 0;
3246     res->otherInfo = 0;
3247
3248     apdu->which = Z_APDU_sortResponse;
3249     apdu->u.sortResponse = res;
3250     if (log_request)
3251     {
3252         WRBUF wr = wrbuf_alloc();
3253         wrbuf_printf(wr, "Sort ");
3254         if (bsrr->errcode)
3255             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3256         else
3257             wrbuf_printf(wr,  "OK -");
3258         wrbuf_printf(wr, " (");
3259         for (i = 0; i<req->num_inputResultSetNames; i++)
3260         {
3261             if (i)
3262                 wrbuf_printf(wr, "+");
3263             wrbuf_printf(wr, req->inputResultSetNames[i]);
3264         }
3265         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3266
3267         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3268         wrbuf_free(wr, 1);
3269     }
3270     return apdu;
3271 }
3272
3273 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3274     int *fd)
3275 {
3276     int i;
3277     Z_DeleteResultSetRequest *req =
3278         reqb->apdu_request->u.deleteResultSetRequest;
3279     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3280         odr_malloc (assoc->encode, sizeof(*res));
3281     bend_delete_rr *bdrr = (bend_delete_rr *)
3282         odr_malloc (assoc->encode, sizeof(*bdrr));
3283     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3284
3285     yaz_log(log_requestdetail, "Got DeleteRequest.");
3286
3287     bdrr->num_setnames = req->num_resultSetList;
3288     bdrr->setnames = req->resultSetList;
3289     for (i = 0; i<req->num_resultSetList; i++)
3290         yaz_log(log_requestdetail, "resultset: '%s'",
3291                 req->resultSetList[i]);
3292     bdrr->stream = assoc->encode;
3293     bdrr->print = assoc->print;
3294     bdrr->function = *req->deleteFunction;
3295     bdrr->referenceId = req->referenceId;
3296     bdrr->statuses = 0;
3297     if (bdrr->num_setnames > 0)
3298     {
3299         bdrr->statuses = (int*)
3300             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3301                        bdrr->num_setnames);
3302         for (i = 0; i < bdrr->num_setnames; i++)
3303             bdrr->statuses[i] = 0;
3304     }
3305     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3306
3307     res->referenceId = req->referenceId;
3308
3309     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3310
3311     res->deleteListStatuses = 0;
3312     if (bdrr->num_setnames > 0)
3313     {
3314         int i;
3315         res->deleteListStatuses = (Z_ListStatuses *)
3316             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3317         res->deleteListStatuses->num = bdrr->num_setnames;
3318         res->deleteListStatuses->elements =
3319             (Z_ListStatus **)
3320             odr_malloc (assoc->encode,
3321                         sizeof(*res->deleteListStatuses->elements) *
3322                         bdrr->num_setnames);
3323         for (i = 0; i<bdrr->num_setnames; i++)
3324         {
3325             res->deleteListStatuses->elements[i] =
3326                 (Z_ListStatus *)
3327                 odr_malloc (assoc->encode,
3328                             sizeof(**res->deleteListStatuses->elements));
3329             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3330             res->deleteListStatuses->elements[i]->id =
3331                 odr_strdup (assoc->encode, bdrr->setnames[i]);
3332         }
3333     }
3334     res->numberNotDeleted = 0;
3335     res->bulkStatuses = 0;
3336     res->deleteMessage = 0;
3337     res->otherInfo = 0;
3338
3339     apdu->which = Z_APDU_deleteResultSetResponse;
3340     apdu->u.deleteResultSetResponse = res;
3341     if (log_request)
3342     {
3343         WRBUF wr = wrbuf_alloc();
3344         wrbuf_printf(wr, "Delete ");
3345         if (bdrr->delete_status)
3346             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3347         else
3348             wrbuf_printf(wr, "OK -");
3349         for (i = 0; i<req->num_resultSetList; i++)
3350             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3351         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3352         wrbuf_free(wr, 1);
3353     }
3354     return apdu;
3355 }
3356
3357 static void process_close(association *assoc, request *reqb)
3358 {
3359     Z_Close *req = reqb->apdu_request->u.close;
3360     static char *reasons[] =
3361     {
3362         "finished",
3363         "shutdown",
3364         "systemProblem",
3365         "costLimit",
3366         "resources",
3367         "securityViolation",
3368         "protocolError",
3369         "lackOfActivity",
3370         "peerAbort",
3371         "unspecified"
3372     };
3373
3374     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3375         reasons[*req->closeReason], req->diagnosticInformation ?
3376         req->diagnosticInformation : "NULL");
3377     if (assoc->version < 3) /* to make do_force respond with close */
3378         assoc->version = 3;
3379     do_close_req(assoc, Z_Close_finished,
3380                  "Association terminated by client", reqb);
3381     yaz_log(log_request,"Close OK");
3382 }
3383
3384 void save_referenceId (request *reqb, Z_ReferenceId *refid)
3385 {
3386     if (refid)
3387     {
3388         reqb->len_refid = refid->len;
3389         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
3390         memcpy (reqb->refid, refid->buf, refid->len);
3391     }
3392     else
3393     {
3394         reqb->len_refid = 0;
3395         reqb->refid = NULL;
3396     }
3397 }
3398
3399 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
3400 {
3401     process_z_response (a, req, res);
3402 }
3403
3404 bend_request bend_request_mk (bend_association a)
3405 {
3406     request *nreq = request_get (&a->outgoing);
3407     nreq->request_mem = nmem_create ();
3408     return nreq;
3409 }
3410
3411 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
3412 {
3413     Z_ReferenceId *id;
3414     if (!req->refid)
3415         return 0;
3416     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
3417     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
3418     id->len = id->size = req->len_refid;
3419     memcpy (id->buf, req->refid, req->len_refid);
3420     return id;
3421 }
3422
3423 void bend_request_destroy (bend_request *req)
3424 {
3425     nmem_destroy((*req)->request_mem);
3426     request_release(*req);
3427     *req = NULL;
3428 }
3429
3430 int bend_backend_respond (bend_association a, bend_request req)
3431 {
3432     char *msg;
3433     int r;
3434     r = process_z_request (a, req, &msg);
3435     if (r < 0)
3436         yaz_log (YLOG_WARN, "%s", msg);
3437     return r;
3438 }
3439
3440 void bend_request_setdata(bend_request r, void *p)
3441 {
3442     r->clientData = p;
3443 }
3444
3445 void *bend_request_getdata(bend_request r)
3446 {
3447     return r->clientData;
3448 }
3449
3450 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
3451 {
3452     bend_segment_rr req;
3453
3454     req.segment = reqb->apdu_request->u.segmentRequest;
3455     req.stream = assoc->encode;
3456     req.decode = assoc->decode;
3457     req.print = assoc->print;
3458     req.association = assoc;
3459
3460     (*assoc->init->bend_segment)(assoc->backend, &req);
3461
3462     return 0;
3463 }
3464
3465 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3466 {
3467     bend_esrequest_rr esrequest;
3468     const char *ext_name = "unknown";
3469
3470     Z_ExtendedServicesRequest *req =
3471         reqb->apdu_request->u.extendedServicesRequest;
3472     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3473
3474     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3475
3476     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3477     esrequest.stream = assoc->encode;
3478     esrequest.decode = assoc->decode;
3479     esrequest.print = assoc->print;
3480     esrequest.errcode = 0;
3481     esrequest.errstring = NULL;
3482     esrequest.request = reqb;
3483     esrequest.association = assoc;
3484     esrequest.taskPackage = 0;
3485     esrequest.referenceId = req->referenceId;
3486
3487
3488     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3489     {
3490         switch(esrequest.esr->taskSpecificParameters->which)
3491         {
3492         case Z_External_itemOrder:
3493             ext_name = "ItemOrder"; break;
3494         case Z_External_update:
3495             ext_name = "Update"; break;
3496         case Z_External_update0:
3497             ext_name = "Update0"; break;
3498         case Z_External_ESAdmin:
3499             ext_name = "Admin"; break;
3500
3501         }
3502     }
3503
3504     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3505
3506     /* If the response is being delayed, return NULL */
3507     if (esrequest.request == NULL)
3508         return(NULL);
3509
3510     resp->referenceId = req->referenceId;
3511
3512     if (esrequest.errcode == -1)
3513     {
3514         /* Backend service indicates request will be processed */
3515         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3516         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3517     }
3518     else if (esrequest.errcode == 0)
3519     {
3520         /* Backend service indicates request will be processed */
3521         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3522         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3523     }
3524     else
3525     {
3526         Z_DiagRecs *diagRecs =
3527             zget_DiagRecs(assoc->encode, esrequest.errcode,
3528                           esrequest.errstring);
3529         /* Backend indicates error, request will not be processed */
3530         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3531         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3532         resp->num_diagnostics = diagRecs->num_diagRecs;
3533         resp->diagnostics = diagRecs->diagRecs;
3534         if (log_request)
3535         {
3536             WRBUF wr = wrbuf_alloc();
3537             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3538             yaz_log(log_request, "EsRequest %s", wrbuf_buf(wr) );
3539             wrbuf_free(wr, 1);
3540         }
3541
3542     }
3543     /* Do something with the members of bend_extendedservice */
3544     if (esrequest.taskPackage)
3545         resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED,
3546                                          (const char *)  esrequest.taskPackage,
3547                                           -1);
3548     yaz_log(YLOG_DEBUG,"Send the result apdu");
3549     return apdu;
3550 }
3551
3552 int bend_assoc_is_alive(bend_association assoc)
3553 {
3554     if (assoc->state == ASSOC_DEAD)
3555         return 0; /* already marked as dead. Don't check I/O chan anymore */
3556
3557     return iochan_is_alive(assoc->client_chan);
3558 }
3559
3560
3561 /*
3562  * Local variables:
3563  * c-basic-offset: 4
3564  * indent-tabs-mode: nil
3565  * End:
3566  * vim: shiftwidth=4 tabstop=8 expandtab
3567  */
3568