src/seshigh.c

   1 /*
   2  * Copyright (C) 1995-2006, Index Data ApS
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: seshigh.c,v 1.106 2006-12-06 21:35:58 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 1;
 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 =  YAZ_BIB1_ELEMENT_SET_NAMES_UNSUPP;
 616             if (details)
 617                 rr->errstring = odr_strdup(rr->stream, details);
 618             return -1;
 619         }
 620         else if (r == 2)
 621         {
 622             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 623             if (input_syntax_raw)
 624             {
 625                 char oidbuf[OID_STR_MAX];
 626                 oid_to_dotstring(input_syntax_raw, oidbuf);
 627                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 628             }
 629             return -1;
 630         }
 631         if (backend_schema)
 632         {
 633             yaz_set_esn(&rr->comp, backend_schema, rr->stream->mem);
 634         }
 635         if (backend_syntax)
 636         {
 637             oident *oident_syntax = oid_getentbyoid(backend_syntax);
 638
 639             rr->request_format_raw = backend_syntax;
 640
 641             if (oident_syntax)
 642                 rr->request_format = oident_syntax->value;
 643             else
 644                 rr->request_format = VAL_NONE;
 645         }
 646     }
 647     (*assoc->init->bend_fetch)(assoc->backend, rr);
 648     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
 649     {   /* post conversion must take place .. */
 650         WRBUF output_record = wrbuf_alloc();
 651         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 652         if (r)
 653         {
 654             const char *details = yaz_record_conv_get_error(rc);
 655             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 656             if (details)
 657                 rr->errstring = odr_strdup(rr->stream, details);
 658         }
 659         else
 660         {
 661             rr->len = wrbuf_len(output_record);
 662             rr->record = odr_malloc(rr->stream, rr->len);
 663             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 664         }
 665         wrbuf_free(output_record, 1);
 666     }
 667     if (match_syntax)
 668     {
 669         struct oident *oi = oid_getentbyoid(match_syntax);
 670         rr->output_format = oi ? oi->value : VAL_NONE;
 671         rr->output_format_raw = match_syntax;
 672     }
 673     if (match_schema)
 674         rr->schema = odr_strdup(rr->stream, match_schema);
 675     return 0;
 676 #else
 677     (*assoc->init->bend_fetch)(assoc->backend, rr);
 678 #endif
 679 }
 680
 681 static int srw_bend_fetch(association *assoc, int pos,
 682                           Z_SRW_searchRetrieveRequest *srw_req,
 683                           Z_SRW_record *record,
 684                           const char **addinfo)
 685 {
 686     bend_fetch_rr rr;
 687     ODR o = assoc->encode;
 688
 689     rr.setname = "default";
 690     rr.number = pos;
 691     rr.referenceId = 0;
 692     rr.request_format = VAL_TEXT_XML;
 693     rr.request_format_raw = yaz_oidval_to_z3950oid(assoc->decode,
 694                                                    CLASS_RECSYN,
 695                                                    VAL_TEXT_XML);
 696     rr.comp = (Z_RecordComposition *)
 697             odr_malloc(assoc->decode, sizeof(*rr.comp));
 698     rr.comp->which = Z_RecordComp_complex;
 699     rr.comp->u.complex = (Z_CompSpec *)
 700             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 701     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 702         odr_malloc(assoc->encode, sizeof(bool_t));
 703     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 704     rr.comp->u.complex->num_dbSpecific = 0;
 705     rr.comp->u.complex->dbSpecific = 0;
 706     rr.comp->u.complex->num_recordSyntax = 0;
 707     rr.comp->u.complex->recordSyntax = 0;
 708
 709     rr.comp->u.complex->generic = (Z_Specification *)
 710             odr_malloc(assoc->decode, sizeof(Z_Specification));
 711
 712     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 713     rr.comp->u.complex->generic->which = Z_Schema_uri;
 714     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 715
 716     /* ESN = recordSchema if recordSchema is present */
 717     rr.comp->u.complex->generic->elementSpec = 0;
 718     if (srw_req->recordSchema)
 719     {
 720         rr.comp->u.complex->generic->elementSpec =
 721             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 722         rr.comp->u.complex->generic->elementSpec->which =
 723             Z_ElementSpec_elementSetName;
 724         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 725             srw_req->recordSchema;
 726     }
 727
 728     rr.stream = assoc->encode;
 729     rr.print = assoc->print;
 730
 731     rr.basename = 0;
 732     rr.len = 0;
 733     rr.record = 0;
 734     rr.last_in_set = 0;
 735     rr.errcode = 0;
 736     rr.errstring = 0;
 737     rr.surrogate_flag = 0;
 738     rr.schema = srw_req->recordSchema;
 739
 740     if (!assoc->init->bend_fetch)
 741         return 1;
 742
 743     retrieve_fetch(assoc, &rr);
 744
 745     if (rr.errcode && rr.surrogate_flag)
 746     {
 747         int code = yaz_diag_bib1_to_srw(rr.errcode);
 748         const char *message = yaz_diag_srw_str(code);
 749         int len = 200;
 750         if (message)
 751             len += strlen(message);
 752         if (rr.errstring)
 753             len += strlen(rr.errstring);
 754
 755         record->recordData_buf = odr_malloc(o, len);
 756
 757         sprintf(record->recordData_buf, "<diagnostic "
 758                 "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
 759                 " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
 760         if (rr.errstring)
 761             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 762                     " <details>%s</details>\n", rr.errstring);
 763         if (message)
 764             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 765                     " <message>%s</message>\n", message);
 766         sprintf(record->recordData_buf + strlen(record->recordData_buf),
 767                 "</diagnostic>\n");
 768         record->recordData_len = strlen(record->recordData_buf);
 769         record->recordPosition = odr_intdup(o, pos);
 770         record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
 771         return 0;
 772     }
 773     else if (rr.len >= 0)
 774     {
 775         record->recordData_buf = rr.record;
 776         record->recordData_len = rr.len;
 777         record->recordPosition = odr_intdup(o, pos);
 778         if (rr.schema)
 779             record->recordSchema = odr_strdup(o, rr.schema);
 780         else
 781             record->recordSchema = 0;
 782     }
 783     if (rr.errcode)
 784     {
 785         *addinfo = rr.errstring;
 786         return rr.errcode;
 787     }
 788     return 0;
 789 }
 790
 791 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 792                    Z_Query *query_result)
 793 {
 794     /* have a CQL query and  CQL to PQF transform .. */
 795     CQL_parser cp = cql_parser_create();
 796     int r;
 797     int srw_errcode = 0;
 798     const char *add = 0;
 799     char rpn_buf[5120];
 800
 801     r = cql_parser_string(cp, cql);
 802     if (r)
 803     {
 804         /* CQL syntax error */
 805         srw_errcode = 10;
 806     }
 807     if (!r)
 808     {
 809         /* Syntax OK */
 810         r = cql_transform_buf(ct,
 811                               cql_parser_result(cp),
 812                               rpn_buf, sizeof(rpn_buf)-1);
 813         if (r)
 814             srw_errcode  = cql_transform_error(ct, &add);
 815     }
 816     if (!r)
 817     {
 818         /* Syntax & transform OK. */
 819         /* Convert PQF string to Z39.50 to RPN query struct */
 820         YAZ_PQF_Parser pp = yaz_pqf_create();
 821         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 822         if (!rpnquery)
 823         {
 824             size_t off;
 825             const char *pqf_msg;
 826             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 827             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 828                     pqf_msg, code);
 829             srw_errcode = 10;
 830         }
 831         else
 832         {
 833             query_result->which = Z_Query_type_1;
 834             query_result->u.type_1 = rpnquery;
 835         }
 836         yaz_pqf_destroy(pp);
 837     }
 838     cql_parser_destroy(cp);
 839     return srw_errcode;
 840 }
 841
 842 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 843                         Z_AttributesPlusTerm *result)
 844 {
 845     Z_Query query;
 846     Z_RPNQuery *rpn;
 847     int srw_error = cql2pqf(odr, cql, ct, &query);
 848     if (srw_error)
 849         return srw_error;
 850     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 851         return 10; /* bad query type */
 852     rpn = query.u.type_1;
 853     if (!rpn->RPNStructure)
 854         return 10; /* must be structure */
 855     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 856         return 10; /* must be simple */
 857     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 858         return 10; /* must be attributes plus term node .. */
 859     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 860            sizeof(*result));
 861     return 0;
 862 }
 863
 864 static void srw_bend_search(association *assoc, request *req,
 865                             Z_SRW_PDU *sr,
 866                             Z_SRW_searchRetrieveResponse *srw_res,
 867                             int *http_code)
 868 {
 869     int srw_error = 0;
 870     Z_External *ext;
 871     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 872
 873     *http_code = 200;
 874     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 875     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 876     if (srw_res->num_diagnostics == 0 && assoc->init)
 877     {
 878         bend_search_rr rr;
 879         rr.setname = "default";
 880         rr.replace_set = 1;
 881         rr.num_bases = 1;
 882         rr.basenames = &srw_req->database;
 883         rr.referenceId = 0;
 884         rr.srw_sortKeys = 0;
 885         rr.srw_setname = 0;
 886         rr.srw_setnameIdleTime = 0;
 887         rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 888         rr.query->u.type_1 = 0;
 889
 890         if (srw_req->query_type == Z_SRW_query_type_cql)
 891         {
 892             if (assoc->server && assoc->server->cql_transform)
 893             {
 894                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 895                                           assoc->server->cql_transform,
 896                                           rr.query);
 897                 if (srw_errcode)
 898                 {
 899                     yaz_add_srw_diagnostic(assoc->encode,
 900                                            &srw_res->diagnostics,
 901                                            &srw_res->num_diagnostics,
 902                                            srw_errcode, 0);
 903                 }
 904             }
 905             else
 906             {
 907                 /* CQL query to backend. Wrap it - Z39.50 style */
 908                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 909                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 910                                                         "1.2.840.10003.16.2");
 911                 ext->indirect_reference = 0;
 912                 ext->descriptor = 0;
 913                 ext->which = Z_External_CQL;
 914                 ext->u.cql = srw_req->query.cql;
 915
 916                 rr.query->which = Z_Query_type_104;
 917                 rr.query->u.type_104 =  ext;
 918             }
 919         }
 920         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 921         {
 922             Z_RPNQuery *RPNquery;
 923             YAZ_PQF_Parser pqf_parser;
 924
 925             pqf_parser = yaz_pqf_create ();
 926
 927             RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
 928                                       srw_req->query.pqf);
 929             if (!RPNquery)
 930             {
 931                 const char *pqf_msg;
 932                 size_t off;
 933                 int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
 934                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 935                         code, pqf_msg, (long) off);
 936                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 937             }
 938
 939             rr.query->which = Z_Query_type_1;
 940             rr.query->u.type_1 =  RPNquery;
 941
 942             yaz_pqf_destroy (pqf_parser);
 943         }
 944         else
 945         {
 946             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 947                                    &srw_res->num_diagnostics,
 948                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 949         }
 950         if (rr.query->u.type_1)
 951         {
 952             rr.stream = assoc->encode;
 953             rr.decode = assoc->decode;
 954             rr.print = assoc->print;
 955             rr.request = req;
 956             if ( srw_req->sort.sortKeys )
 957                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 958                                              srw_req->sort.sortKeys );
 959             rr.association = assoc;
 960             rr.fd = 0;
 961             rr.hits = 0;
 962             rr.errcode = 0;
 963             rr.errstring = 0;
 964             rr.search_info = 0;
 965             yaz_log_zquery_level(log_requestdetail,rr.query);
 966
 967             (assoc->init->bend_search)(assoc->backend, &rr);
 968             if (rr.errcode)
 969             {
 970                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 971                 {
 972                     *http_code = 404;
 973                 }
 974                 else
 975                 {
 976                     srw_error = yaz_diag_bib1_to_srw (rr.errcode);
 977                     yaz_add_srw_diagnostic(assoc->encode,
 978                                            &srw_res->diagnostics,
 979                                            &srw_res->num_diagnostics,
 980                                            srw_error, rr.errstring);
 981                 }
 982             }
 983             else
 984             {
 985                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
 986                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
 987
 988                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
 989                         start, number, rr.hits);
 990
 991                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 992                 if (rr.srw_setname)
 993                 {
 994                     srw_res->resultSetId =
 995                         odr_strdup(assoc->encode, rr.srw_setname );
 996                     srw_res->resultSetIdleTime =
 997                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
 998                 }
 999
1000                 if ((rr.hits > 0 && start > rr.hits) || start < 1)
1001                 {
1002                     yaz_add_srw_diagnostic(
1003                         assoc->encode,
1004                         &srw_res->diagnostics, &srw_res->num_diagnostics,
1005                         YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1006                 }
1007                 else if (number > 0)
1008                 {
1009                     int i;
1010                     int ok = 1;
1011                     if (start + number > rr.hits)
1012                         number = rr.hits - start + 1;
1013
1014                     /* Call bend_present if defined */
1015                     if (assoc->init->bend_present)
1016                     {
1017                         bend_present_rr *bprr = (bend_present_rr*)
1018                             odr_malloc (assoc->decode, sizeof(*bprr));
1019                         bprr->setname = "default";
1020                         bprr->start = start;
1021                         bprr->number = number;
1022                         bprr->format = VAL_TEXT_XML;
1023                         if (srw_req->recordSchema)
1024                         {
1025                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1026                                                                             sizeof(*bprr->comp));
1027                             bprr->comp->which = Z_RecordComp_simple;
1028                             bprr->comp->u.simple = (Z_ElementSetNames *)
1029                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1030                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1031                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1032                         }
1033                         else
1034                         {
1035                             bprr->comp = 0;
1036                         }
1037                         bprr->stream = assoc->encode;
1038                         bprr->referenceId = 0;
1039                         bprr->print = assoc->print;
1040                         bprr->request = req;
1041                         bprr->association = assoc;
1042                         bprr->errcode = 0;
1043                         bprr->errstring = NULL;
1044                         (*assoc->init->bend_present)(assoc->backend, bprr);
1045
1046                         if (!bprr->request)
1047                             return;
1048                         if (bprr->errcode)
1049                         {
1050                             srw_error = yaz_diag_bib1_to_srw (bprr->errcode);
1051                             yaz_add_srw_diagnostic(assoc->encode,
1052                                                    &srw_res->diagnostics,
1053                                                    &srw_res->num_diagnostics,
1054                                                    srw_error, bprr->errstring);
1055                             ok = 0;
1056                         }
1057                     }
1058
1059                     if (ok)
1060                     {
1061                         int j = 0;
1062                         int packing = Z_SRW_recordPacking_string;
1063                         if (srw_req->recordPacking)
1064                         {
1065                             packing =
1066                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1067                             if (packing == -1)
1068                                 packing = Z_SRW_recordPacking_string;
1069                         }
1070                         srw_res->records = (Z_SRW_record *)
1071                             odr_malloc(assoc->encode,
1072                                        number * sizeof(*srw_res->records));
1073
1074                         srw_res->extra_records = (Z_SRW_extra_record **)
1075                             odr_malloc(assoc->encode,
1076                                        number*sizeof(*srw_res->extra_records));
1077
1078                         for (i = 0; i<number; i++)
1079                         {
1080                             int errcode;
1081                             const char *addinfo = 0;
1082
1083                             srw_res->records[j].recordPacking = packing;
1084                             srw_res->records[j].recordData_buf = 0;
1085                             srw_res->extra_records[j] = 0;
1086                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1087                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1088                                                      srw_res->records + j,
1089                                                      &addinfo);
1090                             if (errcode)
1091                             {
1092                                 yaz_add_srw_diagnostic(assoc->encode,
1093                                                        &srw_res->diagnostics,
1094                                                        &srw_res->num_diagnostics,
1095                                                        yaz_diag_bib1_to_srw (errcode),
1096                                                        addinfo);
1097
1098                                 break;
1099                             }
1100                             if (srw_res->records[j].recordData_buf)
1101                                 j++;
1102                         }
1103                         srw_res->num_records = j;
1104                         if (!j)
1105                             srw_res->records = 0;
1106                     }
1107                 }
1108             }
1109         }
1110     }
1111     if (log_request)
1112     {
1113         const char *querystr = "?";
1114         const char *querytype = "?";
1115         WRBUF wr = wrbuf_alloc();
1116
1117         switch (srw_req->query_type)
1118         {
1119         case Z_SRW_query_type_cql:
1120             querytype = "CQL";
1121             querystr = srw_req->query.cql;
1122             break;
1123         case Z_SRW_query_type_pqf:
1124             querytype = "PQF";
1125             querystr = srw_req->query.pqf;
1126             break;
1127         }
1128         wrbuf_printf(wr, "SRWSearch ");
1129         wrbuf_printf(wr, srw_req->database);
1130         wrbuf_printf(wr, " ");
1131         if (srw_res->num_diagnostics)
1132             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1133         else if (*http_code != 200)
1134             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1135         else if (srw_res->numberOfRecords)
1136         {
1137             wrbuf_printf(wr, "OK %d",
1138                          (srw_res->numberOfRecords ?
1139                           *srw_res->numberOfRecords : 0));
1140         }
1141         wrbuf_printf(wr, " %s %d+%d",
1142                      (srw_res->resultSetId ?
1143                       srw_res->resultSetId : "-"),
1144                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1145                      srw_res->num_records);
1146         yaz_log(log_request, "%s %s: %s", wrbuf_buf(wr), querytype, querystr);
1147         wrbuf_free(wr, 1);
1148     }
1149 }
1150
1151 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1152 {
1153 #if YAZ_HAVE_XML2
1154     xmlNodePtr ptr = rr->server_node_ptr;
1155     if (!ptr)
1156         return 0;
1157     for (ptr = ptr->children; ptr; ptr = ptr->next)
1158     {
1159         if (ptr->type != XML_ELEMENT_NODE)
1160             continue;
1161         if (!strcmp((const char *) ptr->name, "explain"))
1162         {
1163             int len;
1164             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1165             xmlChar *buf_out;
1166             char *content;
1167
1168             ptr = xmlCopyNode(ptr, 1);
1169
1170             xmlDocSetRootElement(doc, ptr);
1171
1172             xmlDocDumpMemory(doc, &buf_out, &len);
1173             content = (char*) odr_malloc(rr->stream, 1+len);
1174             memcpy(content, buf_out, len);
1175             content[len] = '\0';
1176
1177             xmlFree(buf_out);
1178             xmlFreeDoc(doc);
1179             rr->explain_buf = content;
1180             return 0;
1181         }
1182     }
1183 #endif
1184     return 0;
1185 }
1186
1187 static void srw_bend_explain(association *assoc, request *req,
1188                              Z_SRW_PDU *sr,
1189                              Z_SRW_explainResponse *srw_res,
1190                              int *http_code)
1191 {
1192     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1193     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1194     *http_code = 404;
1195     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1196     if (assoc->init)
1197     {
1198         bend_explain_rr rr;
1199
1200         rr.stream = assoc->encode;
1201         rr.decode = assoc->decode;
1202         rr.print = assoc->print;
1203         rr.explain_buf = 0;
1204         rr.database = srw_req->database;
1205         if (assoc->server)
1206             rr.server_node_ptr = assoc->server->server_node_ptr;
1207         else
1208             rr.server_node_ptr = 0;
1209         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1210         if (assoc->init->bend_explain)
1211             (*assoc->init->bend_explain)(assoc->backend, &rr);
1212         else
1213             srw_bend_explain_default(assoc->backend, &rr);
1214
1215         if (rr.explain_buf)
1216         {
1217             int packing = Z_SRW_recordPacking_string;
1218             if (srw_req->recordPacking)
1219             {
1220                 packing =
1221                     yaz_srw_str_to_pack(srw_req->recordPacking);
1222                 if (packing == -1)
1223                     packing = Z_SRW_recordPacking_string;
1224             }
1225             srw_res->record.recordSchema = rr.schema;
1226             srw_res->record.recordPacking = packing;
1227             srw_res->record.recordData_buf = rr.explain_buf;
1228             srw_res->record.recordData_len = strlen(rr.explain_buf);
1229             srw_res->record.recordPosition = 0;
1230             *http_code = 200;
1231         }
1232     }
1233 }
1234
1235 static void srw_bend_scan(association *assoc, request *req,
1236                           Z_SRW_PDU *sr,
1237                           Z_SRW_scanResponse *srw_res,
1238                           int *http_code)
1239 {
1240     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1241     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1242
1243     *http_code = 200;
1244     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1245     if (srw_res->num_diagnostics == 0 && assoc->init)
1246     {
1247         struct scan_entry *save_entries;
1248
1249         bend_scan_rr *bsrr = (bend_scan_rr *)
1250             odr_malloc (assoc->encode, sizeof(*bsrr));
1251         bsrr->num_bases = 1;
1252         bsrr->basenames = &srw_req->database;
1253
1254         bsrr->num_entries = srw_req->maximumTerms ?
1255             *srw_req->maximumTerms : 10;
1256         bsrr->term_position = srw_req->responsePosition ?
1257             *srw_req->responsePosition : 1;
1258
1259         bsrr->errcode = 0;
1260         bsrr->errstring = 0;
1261         bsrr->referenceId = 0;
1262         bsrr->stream = assoc->encode;
1263         bsrr->print = assoc->print;
1264         bsrr->step_size = odr_intdup(assoc->decode, 0);
1265         bsrr->entries = 0;
1266
1267         if (bsrr->num_entries > 0)
1268         {
1269             int i;
1270             bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1271                                        bsrr->num_entries);
1272             for (i = 0; i<bsrr->num_entries; i++)
1273             {
1274                 bsrr->entries[i].term = 0;
1275                 bsrr->entries[i].occurrences = 0;
1276                 bsrr->entries[i].errcode = 0;
1277                 bsrr->entries[i].errstring = 0;
1278                 bsrr->entries[i].display_term = 0;
1279             }
1280         }
1281         save_entries = bsrr->entries;  /* save it so we can compare later */
1282
1283         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1284             assoc->init->bend_scan)
1285         {
1286             Odr_oid *scan_attributeSet = 0;
1287             oident *attset;
1288             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1289
1290             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1291                                       &scan_attributeSet,
1292                                       srw_req->scanClause.pqf);
1293             if (scan_attributeSet &&
1294                 (attset = oid_getentbyoid(scan_attributeSet)) &&
1295                 (attset->oclass == CLASS_ATTSET ||
1296                  attset->oclass == CLASS_GENERAL))
1297                 bsrr->attributeset = attset->value;
1298             else
1299                 bsrr->attributeset = VAL_NONE;
1300             yaz_pqf_destroy(pqf_parser);
1301             bsrr->scanClause = 0;
1302             ((int (*)(void *, bend_scan_rr *))
1303              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1304         }
1305         else if (srw_req->query_type == Z_SRW_query_type_cql
1306                  && assoc->init->bend_scan && assoc->server
1307                  && assoc->server->cql_transform)
1308         {
1309             int srw_error;
1310             bsrr->scanClause = 0;
1311             bsrr->attributeset = VAL_NONE;
1312             bsrr->term = odr_malloc(assoc->decode, sizeof(*bsrr->term));
1313             srw_error = cql2pqf_scan(assoc->encode,
1314                                      srw_req->scanClause.cql,
1315                                      assoc->server->cql_transform,
1316                                      bsrr->term);
1317             if (srw_error)
1318                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1319                                        &srw_res->num_diagnostics,
1320                                        srw_error, 0);
1321             else
1322             {
1323                 ((int (*)(void *, bend_scan_rr *))
1324                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1325             }
1326         }
1327         else if (srw_req->query_type == Z_SRW_query_type_cql
1328                  && assoc->init->bend_srw_scan)
1329         {
1330             bsrr->term = 0;
1331             bsrr->attributeset = VAL_NONE;
1332             bsrr->scanClause = srw_req->scanClause.cql;
1333             ((int (*)(void *, bend_scan_rr *))
1334              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1335         }
1336         else
1337         {
1338             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1339                                    &srw_res->num_diagnostics,
1340                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1341         }
1342         if (bsrr->errcode)
1343         {
1344             int srw_error;
1345             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1346             {
1347                 *http_code = 404;
1348                 return;
1349             }
1350             srw_error = yaz_diag_bib1_to_srw (bsrr->errcode);
1351
1352             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1353                                    &srw_res->num_diagnostics,
1354                                    srw_error, bsrr->errstring);
1355         }
1356         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1357         {
1358             int i;
1359             srw_res->terms = (Z_SRW_scanTerm*)
1360                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1361                            bsrr->num_entries);
1362
1363             srw_res->num_terms =  bsrr->num_entries;
1364             for (i = 0; i<bsrr->num_entries; i++)
1365             {
1366                 Z_SRW_scanTerm *t = srw_res->terms + i;
1367                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1368                 t->numberOfRecords =
1369                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1370                 t->displayTerm = 0;
1371                 if (save_entries == bsrr->entries &&
1372                     bsrr->entries[i].display_term)
1373                 {
1374                     /* the entries was _not_ set by the handler. So it's
1375                        safe to test for new member display_term. It is
1376                        NULL'ed by us.
1377                     */
1378                     t->displayTerm = odr_strdup(assoc->encode,
1379                                                 bsrr->entries[i].display_term);
1380                 }
1381                 t->whereInList = 0;
1382             }
1383         }
1384     }
1385     if (log_request)
1386     {
1387         WRBUF wr = wrbuf_alloc();
1388         const char *querytype = 0;
1389         const char *querystr = 0;
1390
1391         switch(srw_req->query_type)
1392         {
1393         case Z_SRW_query_type_pqf:
1394             querytype = "PQF";
1395             querystr = srw_req->scanClause.pqf;
1396             break;
1397         case Z_SRW_query_type_cql:
1398             querytype = "CQL";
1399             querystr = srw_req->scanClause.cql;
1400             break;
1401         default:
1402             querytype = "UNKNOWN";
1403             querystr = "";
1404         }
1405
1406         wrbuf_printf(wr, "SRWScan ");
1407         wrbuf_printf(wr, srw_req->database);
1408         wrbuf_printf(wr, " ");
1409
1410         if (srw_res->num_diagnostics)
1411             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1412         else if (srw_res->num_terms)
1413             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1414         else
1415             wrbuf_printf(wr, "OK - - ");
1416
1417         wrbuf_printf(wr, "%d+%d+0 ",
1418                      (srw_req->responsePosition ?
1419                       *srw_req->responsePosition : 1),
1420                      (srw_req->maximumTerms ?
1421                       *srw_req->maximumTerms : 1));
1422         /* there is no step size in SRU/W ??? */
1423         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1424         yaz_log(log_request, "%s ", wrbuf_buf(wr) );
1425         wrbuf_free(wr, 1);
1426     }
1427
1428 }
1429
1430 static void srw_bend_update(association *assoc, request *req,
1431                             Z_SRW_PDU *sr,
1432                             Z_SRW_updateResponse *srw_res,
1433                             int *http_code)
1434 {
1435     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1436     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1437     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1438     *http_code = 404;
1439     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1440     if (assoc->init)
1441     {
1442         bend_update_rr rr;
1443         Z_SRW_extra_record *extra = srw_req->extra_record;
1444
1445         rr.stream = assoc->encode;
1446         rr.print = assoc->print;
1447         rr.num_bases = 1;
1448         rr.basenames = &srw_req->database;
1449         rr.operation = srw_req->operation;
1450         rr.operation_status = "failed";
1451         rr.record_id = 0;
1452         rr.record_versions = 0;
1453         rr.num_versions = 0;
1454         rr.record_packing = "string";
1455         rr.record_schema = 0;
1456         rr.record_data = 0;
1457         rr.extra_record_data = 0;
1458         rr.extra_request_data = 0;
1459         rr.extra_response_data = 0;
1460         rr.uri = 0;
1461         rr.message = 0;
1462         rr.details = 0;
1463
1464         *http_code = 200;
1465         if (rr.operation == 0)
1466         {
1467             yaz_add_sru_update_diagnostic(
1468                 assoc->encode, &srw_res->diagnostics,
1469                 &srw_res->num_diagnostics,
1470                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1471                 "action" );
1472             return;
1473         }
1474         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1475         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1476         if (!strcmp( rr.operation, "delete"))
1477         {
1478             if (srw_req->record && !srw_req->record->recordSchema)
1479             {
1480                 rr.record_schema = odr_strdup(
1481                     assoc->encode,
1482                     srw_req->record->recordSchema);
1483             }
1484             if (srw_req->record)
1485             {
1486                 rr.record_data = odr_strdupn(
1487                     assoc->encode,
1488                     srw_req->record->recordData_buf,
1489                     srw_req->record->recordData_len );
1490             }
1491             if (extra && extra->extraRecordData_len)
1492             {
1493                 rr.extra_record_data = odr_strdupn(
1494                     assoc->encode,
1495                     extra->extraRecordData_buf,
1496                     extra->extraRecordData_len );
1497             }
1498             if (srw_req->recordId)
1499                 rr.record_id = srw_req->recordId;
1500             else if (extra && extra->recordIdentifier)
1501                 rr.record_id = extra->recordIdentifier;
1502         }
1503         else if (!strcmp(rr.operation, "replace"))
1504         {
1505             if (srw_req->recordId)
1506                 rr.record_id = srw_req->recordId;
1507             else if (extra && extra->recordIdentifier)
1508                 rr.record_id = extra->recordIdentifier;
1509             else
1510             {
1511                 yaz_add_sru_update_diagnostic(
1512                     assoc->encode, &srw_res->diagnostics,
1513                     &srw_res->num_diagnostics,
1514                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1515                     "recordIdentifier");
1516             }
1517             if (!srw_req->record)
1518             {
1519                 yaz_add_sru_update_diagnostic(
1520                     assoc->encode, &srw_res->diagnostics,
1521                     &srw_res->num_diagnostics,
1522                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1523                     "record");
1524             }
1525             else
1526             {
1527                 if (srw_req->record->recordSchema)
1528                     rr.record_schema = odr_strdup(
1529                         assoc->encode, srw_req->record->recordSchema);
1530                 if (srw_req->record->recordData_len )
1531                 {
1532                     rr.record_data = odr_strdupn(assoc->encode,
1533                                                  srw_req->record->recordData_buf,
1534                                                  srw_req->record->recordData_len );
1535                 }
1536                 else
1537                 {
1538                     yaz_add_sru_update_diagnostic(
1539                         assoc->encode, &srw_res->diagnostics,
1540                         &srw_res->num_diagnostics,
1541                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1542                         "recordData" );
1543                 }
1544             }
1545             if (extra && extra->extraRecordData_len)
1546             {
1547                 rr.extra_record_data = odr_strdupn(
1548                     assoc->encode,
1549                     extra->extraRecordData_buf,
1550                     extra->extraRecordData_len );
1551             }
1552         }
1553         else if (!strcmp(rr.operation, "insert"))
1554         {
1555             if (srw_req->recordId)
1556                 rr.record_id = srw_req->recordId;
1557             else if (extra)
1558                 rr.record_id = extra->recordIdentifier;
1559
1560             if (srw_req->record)
1561             {
1562                 if (srw_req->record->recordSchema)
1563                     rr.record_schema = odr_strdup(
1564                         assoc->encode, srw_req->record->recordSchema);
1565
1566                 if (srw_req->record->recordData_len)
1567                     rr.record_data = odr_strdupn(
1568                         assoc->encode,
1569                         srw_req->record->recordData_buf,
1570                         srw_req->record->recordData_len );
1571             }
1572             if (extra && extra->extraRecordData_len)
1573             {
1574                 rr.extra_record_data = odr_strdupn(
1575                     assoc->encode,
1576                     extra->extraRecordData_buf,
1577                     extra->extraRecordData_len );
1578             }
1579         }
1580         else
1581             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1582                                           &srw_res->num_diagnostics,
1583                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1584                                           rr.operation );
1585
1586         if (srw_req->record)
1587         {
1588             const char *pack_str =
1589                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1590             if (pack_str)
1591                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1592         }
1593
1594         if (srw_req->num_recordVersions)
1595         {
1596             rr.record_versions = srw_req->recordVersions;
1597             rr.num_versions = srw_req->num_recordVersions;
1598         }
1599         if (srw_req->extraRequestData_len)
1600         {
1601             rr.extra_request_data = odr_strdupn(assoc->encode,
1602                                                 srw_req->extraRequestData_buf,
1603                                                 srw_req->extraRequestData_len );
1604         }
1605         if (srw_res->num_diagnostics == 0)
1606         {
1607             if ( assoc->init->bend_srw_update)
1608                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1609             else
1610                 yaz_add_sru_update_diagnostic(
1611                     assoc->encode, &srw_res->diagnostics,
1612                     &srw_res->num_diagnostics,
1613                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1614                     "No Update backend handler");
1615         }
1616
1617         if (rr.uri)
1618             yaz_add_srw_diagnostic_uri(assoc->encode,
1619                                        &srw_res->diagnostics,
1620                                        &srw_res->num_diagnostics,
1621                                        rr.uri,
1622                                        rr.message,
1623                                        rr.details);
1624         srw_res->recordId = rr.record_id;
1625         srw_res->operationStatus = rr.operation_status;
1626         srw_res->recordVersions = rr.record_versions;
1627         srw_res->num_recordVersions = rr.num_versions;
1628         if (srw_res->extraResponseData_len)
1629         {
1630             srw_res->extraResponseData_buf = rr.extra_response_data;
1631             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1632         }
1633         if (srw_res->num_diagnostics == 0 && rr.record_data)
1634         {
1635             srw_res->record = yaz_srw_get_record(assoc->encode);
1636             srw_res->record->recordSchema = rr.record_schema;
1637             if (rr.record_packing)
1638             {
1639                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1640
1641                 if (pack == -1)
1642                 {
1643                     pack = Z_SRW_recordPacking_string;
1644                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1645                             rr.record_packing);
1646                 }
1647                 srw_res->record->recordPacking = pack;
1648             }
1649             srw_res->record->recordData_buf = rr.record_data;
1650             srw_res->record->recordData_len = strlen(rr.record_data);
1651             if (rr.extra_record_data)
1652             {
1653                 Z_SRW_extra_record *ex =
1654                     yaz_srw_get_extra_record(assoc->encode);
1655                 srw_res->extra_record = ex;
1656                 ex->extraRecordData_buf = rr.extra_record_data;
1657                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1658             }
1659         }
1660     }
1661 }
1662
1663 /* check if path is OK (1); BAD (0) */
1664 static int check_path(const char *path)
1665 {
1666     if (*path != '/')
1667         return 0;
1668     if (strstr(path, ".."))
1669         return 0;
1670     return 1;
1671 }
1672
1673 static char *read_file(const char *fname, ODR o, int *sz)
1674 {
1675     char *buf;
1676     FILE *inf = fopen(fname, "rb");
1677     if (!inf)
1678         return 0;
1679
1680     fseek(inf, 0L, SEEK_END);
1681     *sz = ftell(inf);
1682     rewind(inf);
1683     buf = odr_malloc(o, *sz);
1684     fread(buf, 1, *sz, inf);
1685     fclose(inf);
1686     return buf;
1687 }
1688
1689 static void process_http_request(association *assoc, request *req)
1690 {
1691     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1692     ODR o = assoc->encode;
1693     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1694     Z_SRW_PDU *sr = 0;
1695     Z_SOAP *soap_package = 0;
1696     Z_GDU *p = 0;
1697     char *charset = 0;
1698     Z_HTTP_Response *hres = 0;
1699     int keepalive = 1;
1700     const char *stylesheet = 0; /* for now .. set later */
1701     Z_SRW_diagnostic *diagnostic = 0;
1702     int num_diagnostic = 0;
1703     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1704
1705     if (!control_association(assoc, host, 0))
1706     {
1707         p = z_get_HTTP_Response(o, 404);
1708         r = 1;
1709     }
1710     if (r == 2 && assoc->server && assoc->server->docpath
1711         && hreq->path[0] == '/'
1712         &&
1713         /* check if path is a proper prefix of documentroot */
1714         strncmp(hreq->path+1, assoc->server->docpath,
1715                 strlen(assoc->server->docpath))
1716         == 0)
1717     {
1718         if (!check_path(hreq->path))
1719         {
1720             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1721             p = z_get_HTTP_Response(o, 404);
1722         }
1723         else
1724         {
1725             int content_size = 0;
1726             char *content_buf = read_file(hreq->path+1, o, &content_size);
1727             if (!content_buf)
1728             {
1729                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1730                 p = z_get_HTTP_Response(o, 404);
1731             }
1732             else
1733             {
1734                 const char *ctype = 0;
1735                 yaz_mime_types types = yaz_mime_types_create();
1736
1737                 yaz_mime_types_add(types, "xsl", "application/xml");
1738                 yaz_mime_types_add(types, "xml", "application/xml");
1739                 yaz_mime_types_add(types, "css", "text/css");
1740                 yaz_mime_types_add(types, "html", "text/html");
1741                 yaz_mime_types_add(types, "htm", "text/html");
1742                 yaz_mime_types_add(types, "txt", "text/plain");
1743                 yaz_mime_types_add(types, "js", "application/x-javascript");
1744
1745                 yaz_mime_types_add(types, "gif", "image/gif");
1746                 yaz_mime_types_add(types, "png", "image/png");
1747                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1748                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1749
1750                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1751                 if (!ctype)
1752                 {
1753                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1754                     p = z_get_HTTP_Response(o, 404);
1755                 }
1756                 else
1757                 {
1758                     p = z_get_HTTP_Response(o, 200);
1759                     hres = p->u.HTTP_Response;
1760                     hres->content_buf = content_buf;
1761                     hres->content_len = content_size;
1762                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1763                 }
1764                 yaz_mime_types_destroy(types);
1765             }
1766         }
1767         r = 1;
1768     }
1769
1770     if (r == 2)
1771     {
1772         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1773         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1774     }
1775     if (r == 2)  /* not taken */
1776     {
1777         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1778                            &diagnostic, &num_diagnostic);
1779         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1780     }
1781     if (r == 0)  /* decode SRW/SRU OK .. */
1782     {
1783         int http_code = 200;
1784         if (sr->which == Z_SRW_searchRetrieve_request)
1785         {
1786             Z_SRW_PDU *res =
1787                 yaz_srw_get(assoc->encode, Z_SRW_searchRetrieve_response);
1788
1789             stylesheet = sr->u.request->stylesheet;
1790             if (num_diagnostic)
1791             {
1792                 res->u.response->diagnostics = diagnostic;
1793                 res->u.response->num_diagnostics = num_diagnostic;
1794             }
1795             else
1796             {
1797                 srw_bend_search(assoc, req, sr, res->u.response,
1798                                 &http_code);
1799             }
1800             if (http_code == 200)
1801                 soap_package->u.generic->p = res;
1802         }
1803         else if (sr->which == Z_SRW_explain_request)
1804         {
1805             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
1806             stylesheet = sr->u.explain_request->stylesheet;
1807             if (num_diagnostic)
1808             {
1809                 res->u.explain_response->diagnostics = diagnostic;
1810                 res->u.explain_response->num_diagnostics = num_diagnostic;
1811             }
1812             srw_bend_explain(assoc, req, sr,
1813                              res->u.explain_response, &http_code);
1814             if (http_code == 200)
1815                 soap_package->u.generic->p = res;
1816         }
1817         else if (sr->which == Z_SRW_scan_request)
1818         {
1819             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_scan_response);
1820             stylesheet = sr->u.scan_request->stylesheet;
1821             if (num_diagnostic)
1822             {
1823                 res->u.scan_response->diagnostics = diagnostic;
1824                 res->u.scan_response->num_diagnostics = num_diagnostic;
1825             }
1826             srw_bend_scan(assoc, req, sr,
1827                           res->u.scan_response, &http_code);
1828             if (http_code == 200)
1829                 soap_package->u.generic->p = res;
1830         }
1831         else if (sr->which == Z_SRW_update_request)
1832         {
1833             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_update_response);
1834             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1835             if (num_diagnostic)
1836             {
1837                 res->u.update_response->diagnostics = diagnostic;
1838                 res->u.update_response->num_diagnostics = num_diagnostic;
1839             }
1840             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1841             srw_bend_update(assoc, req, sr,
1842                             res->u.update_response, &http_code);
1843             if (http_code == 200)
1844                 soap_package->u.generic->p = res;
1845         }
1846         else
1847         {
1848             yaz_log(log_request, "SOAP ERROR");
1849             /* FIXME - what error, what query */
1850             http_code = 500;
1851             z_soap_error(assoc->encode, soap_package,
1852                          "SOAP-ENV:Client", "Bad method", 0);
1853         }
1854         if (http_code == 200 || http_code == 500)
1855         {
1856             static Z_SOAP_Handler soap_handlers[4] = {
1857 #if YAZ_HAVE_XML2
1858                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1859                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1860                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1861 #endif
1862                 {0, 0, 0}
1863             };
1864             char ctype[60];
1865             int ret;
1866             p = z_get_HTTP_Response(o, 200);
1867             hres = p->u.HTTP_Response;
1868
1869             if (!stylesheet && assoc->server)
1870                 stylesheet = assoc->server->stylesheet;
1871
1872             /* empty stylesheet means NO stylesheet */
1873             if (stylesheet && *stylesheet == '\0')
1874                 stylesheet = 0;
1875
1876             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1877                                        &hres->content_buf, &hres->content_len,
1878                                        soap_handlers, charset, stylesheet);
1879             hres->code = http_code;
1880
1881             strcpy(ctype, "text/xml");
1882             if (charset)
1883             {
1884                 strcat(ctype, "; charset=");
1885                 strcat(ctype, charset);
1886             }
1887             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1888         }
1889         else
1890             p = z_get_HTTP_Response(o, http_code);
1891     }
1892
1893     if (p == 0)
1894         p = z_get_HTTP_Response(o, 500);
1895     hres = p->u.HTTP_Response;
1896     if (!strcmp(hreq->version, "1.0"))
1897     {
1898         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1899         if (v && !strcmp(v, "Keep-Alive"))
1900             keepalive = 1;
1901         else
1902             keepalive = 0;
1903         hres->version = "1.0";
1904     }
1905     else
1906     {
1907         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1908         if (v && !strcmp(v, "close"))
1909             keepalive = 0;
1910         else
1911             keepalive = 1;
1912         hres->version = "1.1";
1913     }
1914     if (!keepalive)
1915     {
1916         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1917         assoc->state = ASSOC_DEAD;
1918         assoc->cs_get_mask = 0;
1919     }
1920     else
1921     {
1922         int t;
1923         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1924
1925         if (alive && isdigit(*(const unsigned char *) alive))
1926             t = atoi(alive);
1927         else
1928             t = 15;
1929         if (t < 0 || t > 3600)
1930             t = 3600;
1931         iochan_settimeout(assoc->client_chan,t);
1932         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1933     }
1934     process_gdu_response(assoc, req, p);
1935 }
1936
1937 static void process_gdu_request(association *assoc, request *req)
1938 {
1939     if (req->gdu_request->which == Z_GDU_Z3950)
1940     {
1941         char *msg = 0;
1942         req->apdu_request = req->gdu_request->u.z3950;
1943         if (process_z_request(assoc, req, &msg) < 0)
1944             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1945     }
1946     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1947         process_http_request(assoc, req);
1948     else
1949     {
1950         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1951     }
1952 }
1953
1954 /*
1955  * Initiate request processing.
1956  */
1957 static int process_z_request(association *assoc, request *req, char **msg)
1958 {
1959     int fd = -1;
1960     Z_APDU *res;
1961     int retval;
1962
1963     *msg = "Unknown Error";
1964     assert(req && req->state == REQUEST_IDLE);
1965     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1966     {
1967         *msg = "Missing InitRequest";
1968         return -1;
1969     }
1970     switch (req->apdu_request->which)
1971     {
1972     case Z_APDU_initRequest:
1973         res = process_initRequest(assoc, req); break;
1974     case Z_APDU_searchRequest:
1975         res = process_searchRequest(assoc, req, &fd); break;
1976     case Z_APDU_presentRequest:
1977         res = process_presentRequest(assoc, req, &fd); break;
1978     case Z_APDU_scanRequest:
1979         if (assoc->init->bend_scan)
1980             res = process_scanRequest(assoc, req, &fd);
1981         else
1982         {
1983             *msg = "Cannot handle Scan APDU";
1984             return -1;
1985         }
1986         break;
1987     case Z_APDU_extendedServicesRequest:
1988         if (assoc->init->bend_esrequest)
1989             res = process_ESRequest(assoc, req, &fd);
1990         else
1991         {
1992             *msg = "Cannot handle Extended Services APDU";
1993             return -1;
1994         }
1995         break;
1996     case Z_APDU_sortRequest:
1997         if (assoc->init->bend_sort)
1998             res = process_sortRequest(assoc, req, &fd);
1999         else
2000         {
2001             *msg = "Cannot handle Sort APDU";
2002             return -1;
2003         }
2004         break;
2005     case Z_APDU_close:
2006         process_close(assoc, req);
2007         return 0;
2008     case Z_APDU_deleteResultSetRequest:
2009         if (assoc->init->bend_delete)
2010             res = process_deleteRequest(assoc, req, &fd);
2011         else
2012         {
2013             *msg = "Cannot handle Delete APDU";
2014             return -1;
2015         }
2016         break;
2017     case Z_APDU_segmentRequest:
2018         if (assoc->init->bend_segment)
2019         {
2020             res = process_segmentRequest (assoc, req);
2021         }
2022         else
2023         {
2024             *msg = "Cannot handle Segment APDU";
2025             return -1;
2026         }
2027         break;
2028     case Z_APDU_triggerResourceControlRequest:
2029         return 0;
2030     default:
2031         *msg = "Bad APDU received";
2032         return -1;
2033     }
2034     if (res)
2035     {
2036         yaz_log(YLOG_DEBUG, "  result immediately available");
2037         retval = process_z_response(assoc, req, res);
2038     }
2039     else if (fd < 0)
2040     {
2041         yaz_log(YLOG_DEBUG, "  result unavailble");
2042         retval = 0;
2043     }
2044     else /* no result yet - one will be provided later */
2045     {
2046         IOCHAN chan;
2047
2048         /* Set up an I/O handler for the fd supplied by the backend */
2049
2050         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2051         req->state = REQUEST_PENDING;
2052         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2053             abort();
2054         iochan_setdata(chan, assoc);
2055         retval = 0;
2056     }
2057     return retval;
2058 }
2059
2060 /*
2061  * Handle message from the backend.
2062  */
2063 void backend_response(IOCHAN i, int event)
2064 {
2065     association *assoc = (association *)iochan_getdata(i);
2066     request *req = request_head(&assoc->incoming);
2067     Z_APDU *res;
2068     int fd;
2069
2070     yaz_log(YLOG_DEBUG, "backend_response");
2071     assert(assoc && req && req->state != REQUEST_IDLE);
2072     /* determine what it is we're waiting for */
2073     switch (req->apdu_request->which)
2074     {
2075         case Z_APDU_searchRequest:
2076             res = response_searchRequest(assoc, req, 0, &fd); break;
2077 #if 0
2078         case Z_APDU_presentRequest:
2079             res = response_presentRequest(assoc, req, 0, &fd); break;
2080         case Z_APDU_scanRequest:
2081             res = response_scanRequest(assoc, req, 0, &fd); break;
2082 #endif
2083         default:
2084             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2085             abort();
2086     }
2087     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2088     {
2089         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2090         do_close(assoc, Z_Close_systemProblem, 0);
2091         iochan_destroy(i);
2092         return;
2093     }
2094     else if (!res) /* no result yet - try again later */
2095     {
2096         yaz_log(YLOG_DEBUG, "   no result yet");
2097         iochan_setfd(i, fd); /* in case fd has changed */
2098     }
2099 }
2100
2101 /*
2102  * Encode response, and transfer the request structure to the outgoing queue.
2103  */
2104 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2105 {
2106     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2107
2108     if (assoc->print)
2109     {
2110         if (!z_GDU(assoc->print, &res, 0, 0))
2111             yaz_log(YLOG_WARN, "ODR print error: %s",
2112                 odr_errmsg(odr_geterror(assoc->print)));
2113         odr_reset(assoc->print);
2114     }
2115     if (!z_GDU(assoc->encode, &res, 0, 0))
2116     {
2117         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2118                 odr_errmsg(odr_geterror(assoc->decode)),
2119                 odr_getelement(assoc->decode));
2120         return -1;
2121     }
2122     req->response = odr_getbuf(assoc->encode, &req->len_response,
2123         &req->size_response);
2124     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2125     odr_reset(assoc->encode);
2126     req->state = REQUEST_IDLE;
2127     request_enq(&assoc->outgoing, req);
2128     /* turn the work over to the ir_session handler */
2129     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2130     assoc->cs_put_mask = EVENT_OUTPUT;
2131     /* Is there more work to be done? give that to the input handler too */
2132     for (;;)
2133     {
2134         req = request_head(&assoc->incoming);
2135         if (req && req->state == REQUEST_IDLE)
2136         {
2137             request_deq(&assoc->incoming);
2138             process_gdu_request(assoc, req);
2139         }
2140         else
2141             break;
2142     }
2143     return 0;
2144 }
2145
2146 /*
2147  * Encode response, and transfer the request structure to the outgoing queue.
2148  */
2149 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2150 {
2151     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2152     gres->which = Z_GDU_Z3950;
2153     gres->u.z3950 = res;
2154
2155     return process_gdu_response(assoc, req, gres);
2156 }
2157
2158 static char *get_vhost(Z_OtherInformation *otherInfo)
2159 {
2160     return yaz_oi_get_string_oidval(&otherInfo, VAL_PROXY, 1, 0);
2161 }
2162
2163 /*
2164  * Handle init request.
2165  * At the moment, we don't check the options
2166  * anywhere else in the code - we just try not to do anything that would
2167  * break a naive client. We'll toss 'em into the association block when
2168  * we need them there.
2169  */
2170 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2171 {
2172     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2173     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2174     Z_InitResponse *resp = apdu->u.initResponse;
2175     bend_initresult *binitres;
2176     char *version;
2177     char options[140];
2178     statserv_options_block *cb = 0;  /* by default no control for backend */
2179
2180     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2181         cb = statserv_getcontrol();  /* got control block for backend */
2182
2183     if (cb && assoc->backend)
2184         (*cb->bend_close)(assoc->backend);
2185
2186     yaz_log(log_requestdetail, "Got initRequest");
2187     if (req->implementationId)
2188         yaz_log(log_requestdetail, "Id:        %s",
2189                 req->implementationId);
2190     if (req->implementationName)
2191         yaz_log(log_requestdetail, "Name:      %s",
2192                 req->implementationName);
2193     if (req->implementationVersion)
2194         yaz_log(log_requestdetail, "Version:   %s",
2195                 req->implementationVersion);
2196
2197     assoc_init_reset(assoc);
2198
2199     assoc->init->auth = req->idAuthentication;
2200     assoc->init->referenceId = req->referenceId;
2201
2202     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2203     {
2204         Z_CharSetandLanguageNegotiation *negotiation =
2205             yaz_get_charneg_record (req->otherInfo);
2206         if (negotiation &&
2207             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2208             assoc->init->charneg_request = negotiation;
2209     }
2210
2211     assoc->backend = 0;
2212     if (cb)
2213     {
2214         if (req->implementationVersion)
2215             yaz_log(log_requestdetail, "Config:    %s",
2216                     cb->configname);
2217
2218         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2219
2220         /* we have a backend control block, so call that init function */
2221         if (!(binitres = (*cb->bend_init)(assoc->init)))
2222         {
2223             yaz_log(YLOG_WARN, "Bad response from backend.");
2224             return 0;
2225         }
2226         assoc->backend = binitres->handle;
2227     }
2228     else
2229     {
2230         /* no backend. return error */
2231         binitres = odr_malloc(assoc->encode, sizeof(*binitres));
2232         binitres->errstring = 0;
2233         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2234         iochan_settimeout(assoc->client_chan, 10);
2235     }
2236     if ((assoc->init->bend_sort))
2237         yaz_log (YLOG_DEBUG, "Sort handler installed");
2238     if ((assoc->init->bend_search))
2239         yaz_log (YLOG_DEBUG, "Search handler installed");
2240     if ((assoc->init->bend_present))
2241         yaz_log (YLOG_DEBUG, "Present handler installed");
2242     if ((assoc->init->bend_esrequest))
2243         yaz_log (YLOG_DEBUG, "ESRequest handler installed");
2244     if ((assoc->init->bend_delete))
2245         yaz_log (YLOG_DEBUG, "Delete handler installed");
2246     if ((assoc->init->bend_scan))
2247         yaz_log (YLOG_DEBUG, "Scan handler installed");
2248     if ((assoc->init->bend_segment))
2249         yaz_log (YLOG_DEBUG, "Segment handler installed");
2250
2251     resp->referenceId = req->referenceId;
2252     *options = '\0';
2253     /* let's tell the client what we can do */
2254     if (ODR_MASK_GET(req->options, Z_Options_search))
2255     {
2256         ODR_MASK_SET(resp->options, Z_Options_search);
2257         strcat(options, "srch");
2258     }
2259     if (ODR_MASK_GET(req->options, Z_Options_present))
2260     {
2261         ODR_MASK_SET(resp->options, Z_Options_present);
2262         strcat(options, " prst");
2263     }
2264     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2265         assoc->init->bend_delete)
2266     {
2267         ODR_MASK_SET(resp->options, Z_Options_delSet);
2268         strcat(options, " del");
2269     }
2270     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2271         assoc->init->bend_esrequest)
2272     {
2273         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2274         strcat (options, " extendedServices");
2275     }
2276     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2277     {
2278         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2279         strcat(options, " namedresults");
2280     }
2281     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2282     {
2283         ODR_MASK_SET(resp->options, Z_Options_scan);
2284         strcat(options, " scan");
2285     }
2286     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2287     {
2288         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2289         strcat(options, " concurrop");
2290     }
2291     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2292     {
2293         ODR_MASK_SET(resp->options, Z_Options_sort);
2294         strcat(options, " sort");
2295     }
2296
2297     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
2298         && assoc->init->charneg_response)
2299     {
2300         Z_OtherInformation **p;
2301         Z_OtherInformationUnit *p0;
2302
2303         yaz_oi_APDU(apdu, &p);
2304
2305         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
2306             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2307
2308             p0->which = Z_OtherInfo_externallyDefinedInfo;
2309             p0->information.externallyDefinedInfo =
2310                 assoc->init->charneg_response;
2311         }
2312         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2313         strcat(options, " negotiation");
2314     }
2315
2316     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2317         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2318
2319     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2320     {
2321         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2322         assoc->version = 1; /* 1 & 2 are equivalent */
2323     }
2324     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2325     {
2326         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2327         assoc->version = 2;
2328     }
2329     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2330     {
2331         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2332         assoc->version = 3;
2333     }
2334
2335     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2336
2337     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2338         assoc->maximumRecordSize = *req->maximumRecordSize;
2339
2340     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2341         assoc->preferredMessageSize = *req->preferredMessageSize;
2342
2343     resp->preferredMessageSize = &assoc->preferredMessageSize;
2344     resp->maximumRecordSize = &assoc->maximumRecordSize;
2345
2346     resp->implementationId = odr_prepend(assoc->encode,
2347                 assoc->init->implementation_id,
2348                 resp->implementationId);
2349
2350     resp->implementationName = odr_prepend(assoc->encode,
2351                 assoc->init->implementation_name,
2352                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2353
2354     version = odr_strdup(assoc->encode, "$Revision: 1.106 $");
2355     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2356         version[strlen(version)-2] = '\0';
2357     resp->implementationVersion = odr_prepend(assoc->encode,
2358                 assoc->init->implementation_version,
2359                 odr_prepend(assoc->encode, &version[11],
2360                             resp->implementationVersion));
2361
2362     if (binitres->errcode)
2363     {
2364         assoc->state = ASSOC_DEAD;
2365         resp->userInformationField =
2366             init_diagnostics(assoc->encode, binitres->errcode,
2367                              binitres->errstring);
2368         *resp->result = 0;
2369     }
2370     if (log_request)
2371     {
2372         if (!req->idAuthentication)
2373             yaz_log(log_request, "Auth none");
2374         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2375         {
2376             const char *open = req->idAuthentication->u.open;
2377             const char *slash = strchr(open, '/');
2378             int len;
2379             if (slash)
2380                 len = slash - open;
2381             else
2382                 len = strlen(open);
2383                 yaz_log(log_request, "Auth open %.*s", len, open);
2384         }
2385         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2386         {
2387             const char *user = req->idAuthentication->u.idPass->userId;
2388             const char *group = req->idAuthentication->u.idPass->groupId;
2389             yaz_log(log_request, "Auth idPass %s %s",
2390                     user ? user : "-", group ? group : "-");
2391         }
2392         else if (req->idAuthentication->which
2393                  == Z_IdAuthentication_anonymous)
2394         {
2395             yaz_log(log_request, "Auth anonymous");
2396         }
2397         else
2398         {
2399             yaz_log(log_request, "Auth other");
2400         }
2401     }
2402     if (log_request)
2403     {
2404         WRBUF wr = wrbuf_alloc();
2405         wrbuf_printf(wr, "Init ");
2406         if (binitres->errcode)
2407             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2408         else
2409             wrbuf_printf(wr, "OK -");
2410         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2411                      (req->implementationId ? req->implementationId :"-"),
2412                      (req->implementationName ?
2413                       req->implementationName : "-"),
2414                      (req->implementationVersion ?
2415                       req->implementationVersion : "-")
2416             );
2417         yaz_log(log_request, "%s", wrbuf_buf(wr));
2418         wrbuf_free(wr, 1);
2419     }
2420     return apdu;
2421 }
2422
2423 /*
2424  * Set the specified `errcode' and `errstring' into a UserInfo-1
2425  * external to be returned to the client in accordance with Z35.90
2426  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2427  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2428  */
2429 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2430 {
2431     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2432         addinfo ? " -- " : "", addinfo ? addinfo : "");
2433     return zget_init_diagnostics(odr, error, addinfo);
2434 }
2435
2436 /*
2437  * nonsurrogate diagnostic record.
2438  */
2439 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2440 {
2441     Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec));
2442
2443     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2444             addinfo ? " -- " : "", addinfo ? addinfo : "");
2445
2446     rec->which = Z_Records_NSD;
2447     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2448                                                            error, addinfo);
2449     return rec;
2450 }
2451
2452 /*
2453  * surrogate diagnostic.
2454  */
2455 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2456                                           const char *dbname,
2457                                           int error, const char *addinfo)
2458 {
2459     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2460             addinfo ? " -- " : "", addinfo ? addinfo : "");
2461     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2462 }
2463
2464 static Z_Records *pack_records(association *a, char *setname, int start,
2465                                int *num, Z_RecordComposition *comp,
2466                                int *next, int *pres, oid_value format,
2467                                Z_ReferenceId *referenceId,
2468                                int *oid, int *errcode)
2469 {
2470     int recno, total_length = 0, toget = *num, dumped_records = 0;
2471     Z_Records *records =
2472         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
2473     Z_NamePlusRecordList *reclist =
2474         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
2475     Z_NamePlusRecord **list =
2476         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
2477
2478     records->which = Z_Records_DBOSD;
2479     records->u.databaseOrSurDiagnostics = reclist;
2480     reclist->num_records = 0;
2481     reclist->records = list;
2482     *pres = Z_PresentStatus_success;
2483     *num = 0;
2484     *next = 0;
2485
2486     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2487     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2488         a->maximumRecordSize);
2489     for (recno = start; reclist->num_records < toget; recno++)
2490     {
2491         bend_fetch_rr freq;
2492         Z_NamePlusRecord *thisrec;
2493         int this_length = 0;
2494         /*
2495          * we get the number of bytes allocated on the stream before any
2496          * allocation done by the backend - this should give us a reasonable
2497          * idea of the total size of the data so far.
2498          */
2499         total_length = odr_total(a->encode) - dumped_records;
2500         freq.errcode = 0;
2501         freq.errstring = 0;
2502         freq.basename = 0;
2503         freq.len = 0;
2504         freq.record = 0;
2505         freq.last_in_set = 0;
2506         freq.setname = setname;
2507         freq.surrogate_flag = 0;
2508         freq.number = recno;
2509         freq.comp = comp;
2510         freq.request_format = format;
2511         freq.request_format_raw = oid;
2512         freq.output_format = format;
2513         freq.output_format_raw = 0;
2514         freq.stream = a->encode;
2515         freq.print = a->print;
2516         freq.referenceId = referenceId;
2517         freq.schema = 0;
2518
2519         retrieve_fetch(a, &freq);
2520
2521         *next = freq.last_in_set ? 0 : recno + 1;
2522
2523         /* backend should be able to signal whether error is system-wide
2524            or only pertaining to current record */
2525         if (freq.errcode)
2526         {
2527             if (!freq.surrogate_flag)
2528             {
2529                 char s[20];
2530                 *pres = Z_PresentStatus_failure;
2531                 /* for 'present request out of range',
2532                    set addinfo to record position if not set */
2533                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2534                                 freq.errstring == 0)
2535                 {
2536                     sprintf (s, "%d", recno);
2537                     freq.errstring = s;
2538                 }
2539                 if (errcode)
2540                     *errcode = freq.errcode;
2541                 return diagrec(a, freq.errcode, freq.errstring);
2542             }
2543             reclist->records[reclist->num_records] =
2544                 surrogatediagrec(a, freq.basename, freq.errcode,
2545                                  freq.errstring);
2546             reclist->num_records++;
2547             continue;
2548         }
2549         if (freq.record == 0)  /* no error and no record ? */
2550         {
2551             *next = 0;   /* signal end-of-set and stop */
2552             break;
2553         }
2554         if (freq.len >= 0)
2555             this_length = freq.len;
2556         else
2557             this_length = odr_total(a->encode) - total_length - dumped_records;
2558         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2559             this_length, total_length, dumped_records);
2560         if (a->preferredMessageSize > 0 &&
2561                 this_length + total_length > a->preferredMessageSize)
2562         {
2563             /* record is small enough, really */
2564             if (this_length <= a->preferredMessageSize && recno > start)
2565             {
2566                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2567                 *pres = Z_PresentStatus_partial_2;
2568                 break;
2569             }
2570             /* record can only be fetched by itself */
2571             if (this_length < a->maximumRecordSize)
2572             {
2573                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2574                 if (toget > 1)
2575                 {
2576                     yaz_log(YLOG_DEBUG, "  Dropped it");
2577                     reclist->records[reclist->num_records] =
2578                          surrogatediagrec(a, freq.basename, 16, 0);
2579                     reclist->num_records++;
2580                     dumped_records += this_length;
2581                     continue;
2582                 }
2583             }
2584             else /* too big entirely */
2585             {
2586                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2587                         this_length, a->maximumRecordSize);
2588                 reclist->records[reclist->num_records] =
2589                     surrogatediagrec(a, freq.basename, 17, 0);
2590                 reclist->num_records++;
2591                 dumped_records += this_length;
2592                 continue;
2593             }
2594         }
2595
2596         if (!(thisrec = (Z_NamePlusRecord *)
2597               odr_malloc(a->encode, sizeof(*thisrec))))
2598             return 0;
2599         if (freq.basename)
2600             thisrec->databaseName = odr_strdup(a->encode, freq.basename);
2601         else
2602             thisrec->databaseName = 0;
2603         thisrec->which = Z_NamePlusRecord_databaseRecord;
2604
2605         if (freq.output_format_raw)
2606         {
2607             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
2608             freq.output_format = ident->value;
2609         }
2610         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
2611                                                  freq.record, freq.len);
2612         if (!thisrec->u.databaseRecord)
2613             return 0;
2614         reclist->records[reclist->num_records] = thisrec;
2615         reclist->num_records++;
2616     }
2617     *num = reclist->num_records;
2618     return records;
2619 }
2620
2621 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2622     int *fd)
2623 {
2624     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2625     bend_search_rr *bsrr =
2626         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
2627
2628     yaz_log(log_requestdetail, "Got SearchRequest.");
2629     bsrr->fd = fd;
2630     bsrr->request = reqb;
2631     bsrr->association = assoc;
2632     bsrr->referenceId = req->referenceId;
2633     save_referenceId (reqb, bsrr->referenceId);
2634     bsrr->srw_sortKeys = 0;
2635     bsrr->srw_setname = 0;
2636     bsrr->srw_setnameIdleTime = 0;
2637
2638     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2639     if (req->databaseNames)
2640     {
2641         int i;
2642         for (i = 0; i < req->num_databaseNames; i++)
2643             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2644     }
2645
2646     yaz_log_zquery_level(log_requestdetail,req->query);
2647
2648     if (assoc->init->bend_search)
2649     {
2650         bsrr->setname = req->resultSetName;
2651         bsrr->replace_set = *req->replaceIndicator;
2652         bsrr->num_bases = req->num_databaseNames;
2653         bsrr->basenames = req->databaseNames;
2654         bsrr->query = req->query;
2655         bsrr->stream = assoc->encode;
2656         nmem_transfer(bsrr->stream->mem, reqb->request_mem);
2657         bsrr->decode = assoc->decode;
2658         bsrr->print = assoc->print;
2659         bsrr->hits = 0;
2660         bsrr->errcode = 0;
2661         bsrr->errstring = NULL;
2662         bsrr->search_info = NULL;
2663
2664         if (assoc->server && assoc->server->cql_transform
2665             && req->query->which == Z_Query_type_104
2666             && req->query->u.type_104->which == Z_External_CQL)
2667         {
2668             /* have a CQL query and a CQL to PQF transform .. */
2669             int srw_errcode =
2670                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2671                         assoc->server->cql_transform, bsrr->query);
2672             if (srw_errcode)
2673                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2674         }
2675         if (!bsrr->errcode)
2676             (assoc->init->bend_search)(assoc->backend, bsrr);
2677         if (!bsrr->request)  /* backend not ready with the search response */
2678             return 0;  /* should not be used any more */
2679     }
2680     else
2681     {
2682         /* FIXME - make a diagnostic for it */
2683         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2684     }
2685     return response_searchRequest(assoc, reqb, bsrr, fd);
2686 }
2687
2688 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2689
2690 /*
2691  * Prepare a searchresponse based on the backend results. We probably want
2692  * to look at making the fetching of records nonblocking as well, but
2693  * so far, we'll keep things simple.
2694  * If bsrt is null, that means we're called in response to a communications
2695  * event, and we'll have to get the response for ourselves.
2696  */
2697 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2698     bend_search_rr *bsrt, int *fd)
2699 {
2700     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2701     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2702     Z_SearchResponse *resp = (Z_SearchResponse *)
2703         odr_malloc (assoc->encode, sizeof(*resp));
2704     int *nulint = odr_intdup (assoc->encode, 0);
2705     bool_t *sr = odr_intdup(assoc->encode, 1);
2706     int *next = odr_intdup(assoc->encode, 0);
2707     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2708     int returnedrecs=0;
2709
2710     apdu->which = Z_APDU_searchResponse;
2711     apdu->u.searchResponse = resp;
2712     resp->referenceId = req->referenceId;
2713     resp->additionalSearchInfo = 0;
2714     resp->otherInfo = 0;
2715     *fd = -1;
2716     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2717     {
2718         yaz_log(YLOG_FATAL, "Bad result from backend");
2719         return 0;
2720     }
2721     else if (bsrt->errcode)
2722     {
2723         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2724         resp->resultCount = nulint;
2725         resp->numberOfRecordsReturned = nulint;
2726         resp->nextResultSetPosition = nulint;
2727         resp->searchStatus = nulint;
2728         resp->resultSetStatus = none;
2729         resp->presentStatus = 0;
2730     }
2731     else
2732     {
2733         int *toget = odr_intdup(assoc->encode, 0);
2734         int *presst = odr_intdup(assoc->encode, 0);
2735         Z_RecordComposition comp, *compp = 0;
2736
2737         yaz_log (log_requestdetail, "resultCount: %d", bsrt->hits);
2738
2739         resp->records = 0;
2740         resp->resultCount = &bsrt->hits;
2741
2742         comp.which = Z_RecordComp_simple;
2743         /* how many records does the user agent want, then? */
2744         if (bsrt->hits <= *req->smallSetUpperBound)
2745         {
2746             *toget = bsrt->hits;
2747             if ((comp.u.simple = req->smallSetElementSetNames))
2748                 compp = &comp;
2749         }
2750         else if (bsrt->hits < *req->largeSetLowerBound)
2751         {
2752             *toget = *req->mediumSetPresentNumber;
2753             if (*toget > bsrt->hits)
2754                 *toget = bsrt->hits;
2755             if ((comp.u.simple = req->mediumSetElementSetNames))
2756                 compp = &comp;
2757         }
2758         else
2759             *toget = 0;
2760
2761         if (*toget && !resp->records)
2762         {
2763             oident *prefformat;
2764             oid_value form;
2765
2766             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2767                 form = VAL_NONE;
2768             else
2769                 form = prefformat->value;
2770
2771             /* Call bend_present if defined */
2772             if (assoc->init->bend_present)
2773             {
2774                 bend_present_rr *bprr = (bend_present_rr *)
2775                     nmem_malloc (reqb->request_mem, sizeof(*bprr));
2776                 bprr->setname = req->resultSetName;
2777                 bprr->start = 1;
2778                 bprr->number = *toget;
2779                 bprr->format = form;
2780                 bprr->comp = compp;
2781                 bprr->referenceId = req->referenceId;
2782                 bprr->stream = assoc->encode;
2783                 bprr->print = assoc->print;
2784                 bprr->request = reqb;
2785                 bprr->association = assoc;
2786                 bprr->errcode = 0;
2787                 bprr->errstring = NULL;
2788                 (*assoc->init->bend_present)(assoc->backend, bprr);
2789
2790                 if (!bprr->request)
2791                     return 0;
2792                 if (bprr->errcode)
2793                 {
2794                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2795                     *resp->presentStatus = Z_PresentStatus_failure;
2796                 }
2797             }
2798
2799             if (!resp->records)
2800                 resp->records = pack_records(assoc, req->resultSetName, 1,
2801                                              toget, compp, next, presst, form, req->referenceId,
2802                                              req->preferredRecordSyntax, NULL);
2803             if (!resp->records)
2804                 return 0;
2805             resp->numberOfRecordsReturned = toget;
2806             returnedrecs = *toget;
2807             resp->nextResultSetPosition = next;
2808             resp->searchStatus = sr;
2809             resp->resultSetStatus = 0;
2810             resp->presentStatus = presst;
2811         }
2812         else
2813         {
2814             if (*resp->resultCount)
2815                 *next = 1;
2816             resp->numberOfRecordsReturned = nulint;
2817             resp->nextResultSetPosition = next;
2818             resp->searchStatus = sr;
2819             resp->resultSetStatus = 0;
2820             resp->presentStatus = 0;
2821         }
2822     }
2823     resp->additionalSearchInfo = bsrt->search_info;
2824
2825     if (log_request)
2826     {
2827         int i;
2828         WRBUF wr = wrbuf_alloc();
2829
2830         for (i = 0 ; i < req->num_databaseNames; i++){
2831             if (i)
2832                 wrbuf_printf(wr, "+");
2833             wrbuf_printf(wr, req->databaseNames[i]);
2834         }
2835         wrbuf_printf(wr, " ");
2836
2837         if (bsrt->errcode)
2838             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2839         else
2840             wrbuf_printf(wr, "OK %d", bsrt->hits);
2841         wrbuf_printf(wr, " %s 1+%d ",
2842                      req->resultSetName, returnedrecs);
2843         yaz_query_to_wrbuf(wr, req->query);
2844
2845         yaz_log(log_request, "Search %s", wrbuf_buf(wr));
2846         wrbuf_free(wr, 1);
2847     }
2848     return apdu;
2849 }
2850
2851 /*
2852  * Maybe we got a little over-friendly when we designed bend_fetch to
2853  * get only one record at a time. Some backends can optimise multiple-record
2854  * fetches, and at any rate, there is some overhead involved in
2855  * all that selecting and hopping around. Problem is, of course, that the
2856  * frontend can't know ahead of time how many records it'll need to
2857  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2858  * is downright lousy as a bulk data transfer protocol.
2859  *
2860  * To start with, we'll do the fetching of records from the backend
2861  * in one operation: To save some trips in and out of the event-handler,
2862  * and to simplify the interface to pack_records. At any rate, asynch
2863  * operation is more fun in operations that have an unpredictable execution
2864  * speed - which is normally more true for search than for present.
2865  */
2866 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2867                                       int *fd)
2868 {
2869     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2870     oident *prefformat;
2871     oid_value form;
2872     Z_APDU *apdu;
2873     Z_PresentResponse *resp;
2874     int *next;
2875     int *num;
2876     int errcode = 0;
2877     const char *errstring = 0;
2878
2879     yaz_log(log_requestdetail, "Got PresentRequest.");
2880
2881     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2882         form = VAL_NONE;
2883     else
2884         form = prefformat->value;
2885     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2886     resp->records = 0;
2887     resp->presentStatus = odr_intdup(assoc->encode, 0);
2888     if (assoc->init->bend_present)
2889     {
2890         bend_present_rr *bprr = (bend_present_rr *)
2891             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2892         bprr->setname = req->resultSetId;
2893         bprr->start = *req->resultSetStartPoint;
2894         bprr->number = *req->numberOfRecordsRequested;
2895         bprr->format = form;
2896         bprr->comp = req->recordComposition;
2897         bprr->referenceId = req->referenceId;
2898         bprr->stream = assoc->encode;
2899         bprr->print = assoc->print;
2900         bprr->request = reqb;
2901         bprr->association = assoc;
2902         bprr->errcode = 0;
2903         bprr->errstring = NULL;
2904         (*assoc->init->bend_present)(assoc->backend, bprr);
2905
2906         if (!bprr->request)
2907             return 0; /* should not happen */
2908         if (bprr->errcode)
2909         {
2910             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2911             *resp->presentStatus = Z_PresentStatus_failure;
2912             errcode = bprr->errcode;
2913             errstring = bprr->errstring;
2914         }
2915     }
2916     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2917     next = odr_intdup(assoc->encode, 0);
2918     num = odr_intdup(assoc->encode, 0);
2919
2920     apdu->which = Z_APDU_presentResponse;
2921     apdu->u.presentResponse = resp;
2922     resp->referenceId = req->referenceId;
2923     resp->otherInfo = 0;
2924
2925     if (!resp->records)
2926     {
2927         *num = *req->numberOfRecordsRequested;
2928         resp->records =
2929             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2930                          num, req->recordComposition, next,
2931                          resp->presentStatus,
2932                          form, req->referenceId, req->preferredRecordSyntax,
2933                          &errcode);
2934     }
2935     if (log_request)
2936     {
2937         WRBUF wr = wrbuf_alloc();
2938         wrbuf_printf(wr, "Present ");
2939
2940         if (*resp->presentStatus == Z_PresentStatus_failure)
2941             wrbuf_printf(wr, "ERROR %d ", errcode);
2942         else if (*resp->presentStatus == Z_PresentStatus_success)
2943             wrbuf_printf(wr, "OK -  ");
2944         else
2945             wrbuf_printf(wr, "Partial %d - ", *resp->presentStatus);
2946
2947         wrbuf_printf(wr, " %s %d+%d ",
2948                 req->resultSetId, *req->resultSetStartPoint,
2949                 *req->numberOfRecordsRequested);
2950         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2951         wrbuf_free(wr, 1);
2952     }
2953     if (!resp->records)
2954         return 0;
2955     resp->numberOfRecordsReturned = num;
2956     resp->nextResultSetPosition = next;
2957
2958     return apdu;
2959 }
2960
2961 /*
2962  * Scan was implemented rather in a hurry, and with support for only the basic
2963  * elements of the service in the backend API. Suggestions are welcome.
2964  */
2965 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2966 {
2967     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2968     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2969     Z_ScanResponse *res = (Z_ScanResponse *)
2970         odr_malloc (assoc->encode, sizeof(*res));
2971     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2972     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2973     Z_ListEntries *ents = (Z_ListEntries *)
2974         odr_malloc (assoc->encode, sizeof(*ents));
2975     Z_DiagRecs *diagrecs_p = NULL;
2976     oident *attset;
2977     bend_scan_rr *bsrr = (bend_scan_rr *)
2978         odr_malloc (assoc->encode, sizeof(*bsrr));
2979     struct scan_entry *save_entries;
2980
2981     yaz_log(log_requestdetail, "Got ScanRequest");
2982
2983     apdu->which = Z_APDU_scanResponse;
2984     apdu->u.scanResponse = res;
2985     res->referenceId = req->referenceId;
2986
2987     /* if step is absent, set it to 0 */
2988     res->stepSize = odr_intdup(assoc->encode, 0);
2989     if (req->stepSize)
2990         *res->stepSize = *req->stepSize;
2991
2992     res->scanStatus = scanStatus;
2993     res->numberOfEntriesReturned = numberOfEntriesReturned;
2994     res->positionOfTerm = 0;
2995     res->entries = ents;
2996     ents->num_entries = 0;
2997     ents->entries = NULL;
2998     ents->num_nonsurrogateDiagnostics = 0;
2999     ents->nonsurrogateDiagnostics = NULL;
3000     res->attributeSet = 0;
3001     res->otherInfo = 0;
3002
3003     if (req->databaseNames)
3004     {
3005         int i;
3006         for (i = 0; i < req->num_databaseNames; i++)
3007             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
3008     }
3009     bsrr->scanClause = 0;
3010     bsrr->errcode = 0;
3011     bsrr->errstring = 0;
3012     bsrr->num_bases = req->num_databaseNames;
3013     bsrr->basenames = req->databaseNames;
3014     bsrr->num_entries = *req->numberOfTermsRequested;
3015     bsrr->term = req->termListAndStartPoint;
3016     bsrr->referenceId = req->referenceId;
3017     bsrr->stream = assoc->encode;
3018     bsrr->print = assoc->print;
3019     bsrr->step_size = res->stepSize;
3020     bsrr->entries = 0;
3021     /* For YAZ 2.0 and earlier it was the backend handler that
3022        initialized entries (member display_term did not exist)
3023        YAZ 2.0 and later sets 'entries'  and initialize all members
3024        including 'display_term'. If YAZ 2.0 or later sees that
3025        entries was modified - we assume that it is an old handler and
3026        that 'display_term' is _not_ set.
3027     */
3028     if (bsrr->num_entries > 0)
3029     {
3030         int i;
3031         bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3032                                    bsrr->num_entries);
3033         for (i = 0; i<bsrr->num_entries; i++)
3034         {
3035             bsrr->entries[i].term = 0;
3036             bsrr->entries[i].occurrences = 0;
3037             bsrr->entries[i].errcode = 0;
3038             bsrr->entries[i].errstring = 0;
3039             bsrr->entries[i].display_term = 0;
3040         }
3041     }
3042     save_entries = bsrr->entries;  /* save it so we can compare later */
3043
3044     if (req->attributeSet &&
3045         (attset = oid_getentbyoid(req->attributeSet)) &&
3046         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
3047         bsrr->attributeset = attset->value;
3048     else
3049         bsrr->attributeset = VAL_NONE;
3050     log_scan_term_level (log_requestdetail, req->termListAndStartPoint,
3051             bsrr->attributeset);
3052     bsrr->term_position = req->preferredPositionInResponse ?
3053         *req->preferredPositionInResponse : 1;
3054
3055     ((int (*)(void *, bend_scan_rr *))
3056      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3057
3058     if (bsrr->errcode)
3059         diagrecs_p = zget_DiagRecs(assoc->encode,
3060                                    bsrr->errcode, bsrr->errstring);
3061     else
3062     {
3063         int i;
3064         Z_Entry **tab = (Z_Entry **)
3065             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
3066
3067         if (bsrr->status == BEND_SCAN_PARTIAL)
3068             *scanStatus = Z_Scan_partial_5;
3069         else
3070             *scanStatus = Z_Scan_success;
3071         ents->entries = tab;
3072         ents->num_entries = bsrr->num_entries;
3073         res->numberOfEntriesReturned = &ents->num_entries;
3074         res->positionOfTerm = &bsrr->term_position;
3075         for (i = 0; i < bsrr->num_entries; i++)
3076         {
3077             Z_Entry *e;
3078             Z_TermInfo *t;
3079             Odr_oct *o;
3080
3081             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3082             if (bsrr->entries[i].occurrences >= 0)
3083             {
3084                 e->which = Z_Entry_termInfo;
3085                 e->u.termInfo = t = (Z_TermInfo *)
3086                     odr_malloc(assoc->encode, sizeof(*t));
3087                 t->suggestedAttributes = 0;
3088                 t->displayTerm = 0;
3089                 if (save_entries == bsrr->entries &&
3090                     bsrr->entries[i].display_term)
3091                 {
3092                     /* the entries was _not_ set by the handler. So it's
3093                        safe to test for new member display_term. It is
3094                        NULL'ed by us.
3095                     */
3096                     t->displayTerm = odr_strdup(assoc->encode,
3097                                                 bsrr->entries[i].display_term);
3098                 }
3099                 t->alternativeTerm = 0;
3100                 t->byAttributes = 0;
3101                 t->otherTermInfo = 0;
3102                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3103                 t->term = (Z_Term *)
3104                     odr_malloc(assoc->encode, sizeof(*t->term));
3105                 t->term->which = Z_Term_general;
3106                 t->term->u.general = o =
3107                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3108                 o->buf = (unsigned char *)
3109                     odr_malloc(assoc->encode, o->len = o->size =
3110                                strlen(bsrr->entries[i].term));
3111                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3112                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3113                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3114             }
3115             else
3116             {
3117                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3118                                                   bsrr->entries[i].errcode,
3119                                                   bsrr->entries[i].errstring);
3120                 assert (drecs->num_diagRecs == 1);
3121                 e->which = Z_Entry_surrogateDiagnostic;
3122                 assert (drecs->diagRecs[0]);
3123                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3124             }
3125         }
3126     }
3127     if (diagrecs_p)
3128     {
3129         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3130         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3131     }
3132     if (log_request)
3133     {
3134         int i;
3135         WRBUF wr = wrbuf_alloc();
3136         wrbuf_printf(wr, "Scan ");
3137         for (i = 0 ; i < req->num_databaseNames; i++){
3138             if (i)
3139                 wrbuf_printf(wr, "+");
3140             wrbuf_printf(wr, req->databaseNames[i]);
3141         }
3142         wrbuf_printf(wr, " ");
3143
3144         if (bsrr->errcode){
3145             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3146             wrbuf_printf(wr, " ");
3147         }
3148         else
3149             wrbuf_printf(wr, "OK ");
3150         /* else if (*res->scanStatus == Z_Scan_success) */
3151         /*    wrbuf_printf(wr, "OK "); */
3152         /* else */
3153         /* wrbuf_printf(wr, "Partial "); */
3154
3155         if (*res->numberOfEntriesReturned)
3156             wrbuf_printf(wr, "%d - ", *res->numberOfEntriesReturned);
3157         else
3158             wrbuf_printf(wr, "0 - ");
3159
3160         wrbuf_printf(wr, "%d+%d+%d ",
3161                      (req->preferredPositionInResponse ?
3162                       *req->preferredPositionInResponse : 1),
3163                      *req->numberOfTermsRequested,
3164                      (res->stepSize ? *res->stepSize : 1));
3165
3166         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3167                           bsrr->attributeset);
3168         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3169         wrbuf_free(wr, 1);
3170     }
3171     return apdu;
3172 }
3173
3174 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3175     int *fd)
3176 {
3177     int i;
3178     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3179     Z_SortResponse *res = (Z_SortResponse *)
3180         odr_malloc (assoc->encode, sizeof(*res));
3181     bend_sort_rr *bsrr = (bend_sort_rr *)
3182         odr_malloc (assoc->encode, sizeof(*bsrr));
3183
3184     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3185
3186     yaz_log(log_requestdetail, "Got SortRequest.");
3187
3188     bsrr->num_input_setnames = req->num_inputResultSetNames;
3189     for (i=0;i<req->num_inputResultSetNames;i++)
3190         yaz_log(log_requestdetail, "Input resultset: '%s'",
3191                 req->inputResultSetNames[i]);
3192     bsrr->input_setnames = req->inputResultSetNames;
3193     bsrr->referenceId = req->referenceId;
3194     bsrr->output_setname = req->sortedResultSetName;
3195     yaz_log(log_requestdetail, "Output resultset: '%s'",
3196                 req->sortedResultSetName);
3197     bsrr->sort_sequence = req->sortSequence;
3198        /*FIXME - dump those sequences too */
3199     bsrr->stream = assoc->encode;
3200     bsrr->print = assoc->print;
3201
3202     bsrr->sort_status = Z_SortResponse_failure;
3203     bsrr->errcode = 0;
3204     bsrr->errstring = 0;
3205
3206     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3207
3208     res->referenceId = bsrr->referenceId;
3209     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3210     res->resultSetStatus = 0;
3211     if (bsrr->errcode)
3212     {
3213         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3214                                        bsrr->errcode, bsrr->errstring);
3215         res->diagnostics = dr->diagRecs;
3216         res->num_diagnostics = dr->num_diagRecs;
3217     }
3218     else
3219     {
3220         res->num_diagnostics = 0;
3221         res->diagnostics = 0;
3222     }
3223     res->resultCount = 0;
3224     res->otherInfo = 0;
3225
3226     apdu->which = Z_APDU_sortResponse;
3227     apdu->u.sortResponse = res;
3228     if (log_request)
3229     {
3230         WRBUF wr = wrbuf_alloc();
3231         wrbuf_printf(wr, "Sort ");
3232         if (bsrr->errcode)
3233             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3234         else
3235             wrbuf_printf(wr,  "OK -");
3236         wrbuf_printf(wr, " (");
3237         for (i = 0; i<req->num_inputResultSetNames; i++)
3238         {
3239             if (i)
3240                 wrbuf_printf(wr, "+");
3241             wrbuf_printf(wr, req->inputResultSetNames[i]);
3242         }
3243         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3244
3245         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3246         wrbuf_free(wr, 1);
3247     }
3248     return apdu;
3249 }
3250
3251 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3252     int *fd)
3253 {
3254     int i;
3255     Z_DeleteResultSetRequest *req =
3256         reqb->apdu_request->u.deleteResultSetRequest;
3257     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3258         odr_malloc (assoc->encode, sizeof(*res));
3259     bend_delete_rr *bdrr = (bend_delete_rr *)
3260         odr_malloc (assoc->encode, sizeof(*bdrr));
3261     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3262
3263     yaz_log(log_requestdetail, "Got DeleteRequest.");
3264
3265     bdrr->num_setnames = req->num_resultSetList;
3266     bdrr->setnames = req->resultSetList;
3267     for (i = 0; i<req->num_resultSetList; i++)
3268         yaz_log(log_requestdetail, "resultset: '%s'",
3269                 req->resultSetList[i]);
3270     bdrr->stream = assoc->encode;
3271     bdrr->print = assoc->print;
3272     bdrr->function = *req->deleteFunction;
3273     bdrr->referenceId = req->referenceId;
3274     bdrr->statuses = 0;
3275     if (bdrr->num_setnames > 0)
3276     {
3277         bdrr->statuses = (int*)
3278             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3279                        bdrr->num_setnames);
3280         for (i = 0; i < bdrr->num_setnames; i++)
3281             bdrr->statuses[i] = 0;
3282     }
3283     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3284
3285     res->referenceId = req->referenceId;
3286
3287     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3288
3289     res->deleteListStatuses = 0;
3290     if (bdrr->num_setnames > 0)
3291     {
3292         int i;
3293         res->deleteListStatuses = (Z_ListStatuses *)
3294             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3295         res->deleteListStatuses->num = bdrr->num_setnames;
3296         res->deleteListStatuses->elements =
3297             (Z_ListStatus **)
3298             odr_malloc (assoc->encode,
3299                         sizeof(*res->deleteListStatuses->elements) *
3300                         bdrr->num_setnames);
3301         for (i = 0; i<bdrr->num_setnames; i++)
3302         {
3303             res->deleteListStatuses->elements[i] =
3304                 (Z_ListStatus *)
3305                 odr_malloc (assoc->encode,
3306                             sizeof(**res->deleteListStatuses->elements));
3307             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3308             res->deleteListStatuses->elements[i]->id =
3309                 odr_strdup (assoc->encode, bdrr->setnames[i]);
3310         }
3311     }
3312     res->numberNotDeleted = 0;
3313     res->bulkStatuses = 0;
3314     res->deleteMessage = 0;
3315     res->otherInfo = 0;
3316
3317     apdu->which = Z_APDU_deleteResultSetResponse;
3318     apdu->u.deleteResultSetResponse = res;
3319     if (log_request)
3320     {
3321         WRBUF wr = wrbuf_alloc();
3322         wrbuf_printf(wr, "Delete ");
3323         if (bdrr->delete_status)
3324             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3325         else
3326             wrbuf_printf(wr, "OK -");
3327         for (i = 0; i<req->num_resultSetList; i++)
3328             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3329         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3330         wrbuf_free(wr, 1);
3331     }
3332     return apdu;
3333 }
3334
3335 static void process_close(association *assoc, request *reqb)
3336 {
3337     Z_Close *req = reqb->apdu_request->u.close;
3338     static char *reasons[] =
3339     {
3340         "finished",
3341         "shutdown",
3342         "systemProblem",
3343         "costLimit",
3344         "resources",
3345         "securityViolation",
3346         "protocolError",
3347         "lackOfActivity",
3348         "peerAbort",
3349         "unspecified"
3350     };
3351
3352     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3353         reasons[*req->closeReason], req->diagnosticInformation ?
3354         req->diagnosticInformation : "NULL");
3355     if (assoc->version < 3) /* to make do_force respond with close */
3356         assoc->version = 3;
3357     do_close_req(assoc, Z_Close_finished,
3358                  "Association terminated by client", reqb);
3359     yaz_log(log_request,"Close OK");
3360 }
3361
3362 void save_referenceId (request *reqb, Z_ReferenceId *refid)
3363 {
3364     if (refid)
3365     {
3366         reqb->len_refid = refid->len;
3367         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
3368         memcpy (reqb->refid, refid->buf, refid->len);
3369     }
3370     else
3371     {
3372         reqb->len_refid = 0;
3373         reqb->refid = NULL;
3374     }
3375 }
3376
3377 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
3378 {
3379     process_z_response (a, req, res);
3380 }
3381
3382 bend_request bend_request_mk (bend_association a)
3383 {
3384     request *nreq = request_get (&a->outgoing);
3385     nreq->request_mem = nmem_create ();
3386     return nreq;
3387 }
3388
3389 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
3390 {
3391     Z_ReferenceId *id;
3392     if (!req->refid)
3393         return 0;
3394     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
3395     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
3396     id->len = id->size = req->len_refid;
3397     memcpy (id->buf, req->refid, req->len_refid);
3398     return id;
3399 }
3400
3401 void bend_request_destroy (bend_request *req)
3402 {
3403     nmem_destroy((*req)->request_mem);
3404     request_release(*req);
3405     *req = NULL;
3406 }
3407
3408 int bend_backend_respond (bend_association a, bend_request req)
3409 {
3410     char *msg;
3411     int r;
3412     r = process_z_request (a, req, &msg);
3413     if (r < 0)
3414         yaz_log (YLOG_WARN, "%s", msg);
3415     return r;
3416 }
3417
3418 void bend_request_setdata(bend_request r, void *p)
3419 {
3420     r->clientData = p;
3421 }
3422
3423 void *bend_request_getdata(bend_request r)
3424 {
3425     return r->clientData;
3426 }
3427
3428 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
3429 {
3430     bend_segment_rr req;
3431
3432     req.segment = reqb->apdu_request->u.segmentRequest;
3433     req.stream = assoc->encode;
3434     req.decode = assoc->decode;
3435     req.print = assoc->print;
3436     req.association = assoc;
3437
3438     (*assoc->init->bend_segment)(assoc->backend, &req);
3439
3440     return 0;
3441 }
3442
3443 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3444 {
3445     bend_esrequest_rr esrequest;
3446     const char *ext_name = "unknown";
3447
3448     Z_ExtendedServicesRequest *req =
3449         reqb->apdu_request->u.extendedServicesRequest;
3450     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3451
3452     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3453
3454     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3455     esrequest.stream = assoc->encode;
3456     esrequest.decode = assoc->decode;
3457     esrequest.print = assoc->print;
3458     esrequest.errcode = 0;
3459     esrequest.errstring = NULL;
3460     esrequest.request = reqb;
3461     esrequest.association = assoc;
3462     esrequest.taskPackage = 0;
3463     esrequest.referenceId = req->referenceId;
3464
3465
3466     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3467     {
3468         switch(esrequest.esr->taskSpecificParameters->which)
3469         {
3470         case Z_External_itemOrder:
3471             ext_name = "ItemOrder"; break;
3472         case Z_External_update:
3473             ext_name = "Update"; break;
3474         case Z_External_update0:
3475             ext_name = "Update0"; break;
3476         case Z_External_ESAdmin:
3477             ext_name = "Admin"; break;
3478
3479         }
3480     }
3481
3482     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3483
3484     /* If the response is being delayed, return NULL */
3485     if (esrequest.request == NULL)
3486         return(NULL);
3487
3488     resp->referenceId = req->referenceId;
3489
3490     if (esrequest.errcode == -1)
3491     {
3492         /* Backend service indicates request will be processed */
3493         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3494         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3495     }
3496     else if (esrequest.errcode == 0)
3497     {
3498         /* Backend service indicates request will be processed */
3499         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3500         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3501     }
3502     else
3503     {
3504         Z_DiagRecs *diagRecs =
3505             zget_DiagRecs(assoc->encode, esrequest.errcode,
3506                           esrequest.errstring);
3507         /* Backend indicates error, request will not be processed */
3508         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3509         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3510         resp->num_diagnostics = diagRecs->num_diagRecs;
3511         resp->diagnostics = diagRecs->diagRecs;
3512         if (log_request)
3513         {
3514             WRBUF wr = wrbuf_alloc();
3515             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3516             yaz_log(log_request, "EsRequest %s", wrbuf_buf(wr) );
3517             wrbuf_free(wr, 1);
3518         }
3519
3520     }
3521     /* Do something with the members of bend_extendedservice */
3522     if (esrequest.taskPackage)
3523         resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED,
3524                                          (const char *)  esrequest.taskPackage,
3525                                           -1);
3526     yaz_log(YLOG_DEBUG,"Send the result apdu");
3527     return apdu;
3528 }
3529
3530 int bend_assoc_is_alive(bend_association assoc)
3531 {
3532     if (assoc->state == ASSOC_DEAD)
3533         return 0; /* already marked as dead. Don't check I/O chan anymore */
3534
3535     return iochan_is_alive(assoc->client_chan);
3536 }
3537
3538
3539 /*
3540  * Local variables:
3541  * c-basic-offset: 4
3542  * indent-tabs-mode: nil
3543  * End:
3544  * vim: shiftwidth=4 tabstop=8 expandtab
3545  */
3546