src/seshigh.c

   1 /*
   2  * Copyright (C) 1995-2005, Index Data ApS
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: seshigh.c,v 1.104 2006-11-14 08:37:38 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  * This is where PDUs from the client are read and the further
 269  * processing is initiated. Flow of control moves down through the
 270  * various process_* functions below, until the encoded result comes back up
 271  * to the output handler in here.
 272  *
 273  *  h     : the I/O channel that has an outstanding event.
 274  *  event : the current outstanding event.
 275  */
 276 void ir_session(IOCHAN h, int event)
 277 {
 278     int res;
 279     association *assoc = (association *)iochan_getdata(h);
 280     COMSTACK conn = assoc->client_link;
 281     request *req;
 282
 283     assert(h && conn && assoc);
 284     if (event == EVENT_TIMEOUT)
 285     {
 286         if (assoc->state != ASSOC_UP)
 287         {
 288             yaz_log(YLOG_DEBUG, "Final timeout - closing connection.");
 289             /* do we need to lod this at all */
 290             cs_close(conn);
 291             destroy_association(assoc);
 292             iochan_destroy(h);
 293         }
 294         else
 295         {
 296             yaz_log(log_sessiondetail,
 297                     "Session idle too long. Sending close.");
 298             do_close(assoc, Z_Close_lackOfActivity, 0);
 299         }
 300         return;
 301     }
 302     if (event & assoc->cs_accept_mask)
 303     {
 304         if (!cs_accept (conn))
 305         {
 306             yaz_log (YLOG_WARN, "accept failed");
 307             destroy_association(assoc);
 308             iochan_destroy(h);
 309         }
 310         iochan_clearflag (h, EVENT_OUTPUT);
 311         if (conn->io_pending)
 312         {   /* cs_accept didn't complete */
 313             assoc->cs_accept_mask =
 314                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 315                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 316
 317             iochan_setflag (h, assoc->cs_accept_mask);
 318         }
 319         else
 320         {   /* cs_accept completed. Prepare for reading (cs_get) */
 321             assoc->cs_accept_mask = 0;
 322             assoc->cs_get_mask = EVENT_INPUT;
 323             iochan_setflag (h, assoc->cs_get_mask);
 324         }
 325         return;
 326     }
 327     if ((event & assoc->cs_get_mask) || (event & EVENT_WORK)) /* input */
 328     {
 329         if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 330         {
 331             yaz_log(YLOG_DEBUG, "ir_session (input)");
 332             /* We aren't speaking to this fellow */
 333             if (assoc->state == ASSOC_DEAD)
 334             {
 335                 yaz_log(log_sessiondetail, "Connection closed - end of session");
 336                 cs_close(conn);
 337                 destroy_association(assoc);
 338                 iochan_destroy(h);
 339                 return;
 340             }
 341             assoc->cs_get_mask = EVENT_INPUT;
 342             res = cs_get(conn, &assoc->input_buffer,
 343                 &assoc->input_buffer_len);
 344             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 345             {
 346                 yaz_log(log_session, "Connection error: %s res=%d",
 347                         cs_errmsg(cs_errno(conn)), res);
 348                 req = request_get(&assoc->incoming); /* get a new request */
 349                 do_close_req(assoc, Z_Close_protocolError,
 350                              "Incoming package too large", req);
 351                 return;
 352             }
 353             else if (res <= 0)
 354             {
 355                 yaz_log(log_sessiondetail, "Connection closed by client");
 356                 cs_close(conn);
 357                 destroy_association(assoc);
 358                 iochan_destroy(h);
 359                 return;
 360             }
 361             else if (res == 1) /* incomplete read - wait for more  */
 362             {
 363                 if (conn->io_pending & CS_WANT_WRITE)
 364                     assoc->cs_get_mask |= EVENT_OUTPUT;
 365                 iochan_setflag(h, assoc->cs_get_mask);
 366                 return;
 367             }
 368             if (cs_more(conn)) /* more stuff - call us again later, please */
 369                 iochan_setevent(h, EVENT_INPUT);
 370
 371             /* we got a complete PDU. Let's decode it */
 372             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 373                             assoc->input_buffer[0] & 0xff,
 374                             assoc->input_buffer[1] & 0xff,
 375                             assoc->input_buffer[2] & 0xff);
 376             req = request_get(&assoc->incoming); /* get a new request */
 377             odr_reset(assoc->decode);
 378             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 379             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 380             {
 381                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 382                         "[near byte %ld] ",
 383                         odr_errmsg(odr_geterror(assoc->decode)),
 384                         odr_getelement(assoc->decode),
 385                         (long) odr_offset(assoc->decode));
 386                 if (assoc->decode->error != OHTTP)
 387                 {
 388                     yaz_log(YLOG_WARN, "PDU dump:");
 389                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 390                     request_release(req);
 391                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 392                 }
 393                 else
 394                 {
 395                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 396                     assoc->state = ASSOC_DEAD;
 397                     process_gdu_response(assoc, req, p);
 398                 }
 399                 return;
 400             }
 401             req->request_mem = odr_extract_mem(assoc->decode);
 402             if (assoc->print)
 403             {
 404                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 405                     yaz_log(YLOG_WARN, "ODR print error: %s",
 406                        odr_errmsg(odr_geterror(assoc->print)));
 407                 odr_reset(assoc->print);
 408             }
 409             request_enq(&assoc->incoming, req);
 410         }
 411
 412         /* can we do something yet? */
 413         req = request_head(&assoc->incoming);
 414         if (req->state == REQUEST_IDLE)
 415         {
 416             request_deq(&assoc->incoming);
 417             process_gdu_request(assoc, req);
 418         }
 419     }
 420     if (event & assoc->cs_put_mask)
 421     {
 422         request *req = request_head(&assoc->outgoing);
 423
 424         assoc->cs_put_mask = 0;
 425         yaz_log(YLOG_DEBUG, "ir_session (output)");
 426         req->state = REQUEST_PENDING;
 427         switch (res = cs_put(conn, req->response, req->len_response))
 428         {
 429         case -1:
 430             yaz_log(log_sessiondetail, "Connection closed by client");
 431             cs_close(conn);
 432             destroy_association(assoc);
 433             iochan_destroy(h);
 434             break;
 435         case 0: /* all sent - release the request structure */
 436             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 437 #if 0
 438             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 439                     req->response);
 440 #endif
 441             nmem_destroy(req->request_mem);
 442             request_deq(&assoc->outgoing);
 443             request_release(req);
 444             if (!request_head(&assoc->outgoing))
 445             {   /* restore mask for cs_get operation ... */
 446                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 447                 iochan_setflag(h, assoc->cs_get_mask);
 448                 if (assoc->state == ASSOC_DEAD)
 449                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 450             }
 451             else
 452             {
 453                 assoc->cs_put_mask = EVENT_OUTPUT;
 454             }
 455             break;
 456         default:
 457             if (conn->io_pending & CS_WANT_WRITE)
 458                 assoc->cs_put_mask |= EVENT_OUTPUT;
 459             if (conn->io_pending & CS_WANT_READ)
 460                 assoc->cs_put_mask |= EVENT_INPUT;
 461             iochan_setflag(h, assoc->cs_put_mask);
 462         }
 463     }
 464     if (event & EVENT_EXCEPT)
 465     {
 466         yaz_log(YLOG_WARN, "ir_session (exception)");
 467         cs_close(conn);
 468         destroy_association(assoc);
 469         iochan_destroy(h);
 470     }
 471 }
 472
 473 static int process_z_request(association *assoc, request *req, char **msg);
 474
 475
 476 static void assoc_init_reset(association *assoc)
 477 {
 478     xfree (assoc->init);
 479     assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init));
 480
 481     assoc->init->stream = assoc->encode;
 482     assoc->init->print = assoc->print;
 483     assoc->init->auth = 0;
 484     assoc->init->referenceId = 0;
 485     assoc->init->implementation_version = 0;
 486     assoc->init->implementation_id = 0;
 487     assoc->init->implementation_name = 0;
 488     assoc->init->bend_sort = NULL;
 489     assoc->init->bend_search = NULL;
 490     assoc->init->bend_present = NULL;
 491     assoc->init->bend_esrequest = NULL;
 492     assoc->init->bend_delete = NULL;
 493     assoc->init->bend_scan = NULL;
 494     assoc->init->bend_segment = NULL;
 495     assoc->init->bend_fetch = NULL;
 496     assoc->init->bend_explain = NULL;
 497     assoc->init->bend_srw_scan = NULL;
 498     assoc->init->bend_srw_update = NULL;
 499
 500     assoc->init->charneg_request = NULL;
 501     assoc->init->charneg_response = NULL;
 502
 503     assoc->init->decode = assoc->decode;
 504     assoc->init->peer_name =
 505         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
 506
 507     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 508 }
 509
 510 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 511 {
 512     statserv_options_block *cb = statserv_getcontrol();
 513     if (!assoc->init)
 514     {
 515         const char *encoding = "UTF-8";
 516         Z_External *ce;
 517         bend_initresult *binitres;
 518
 519         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 520         assoc_init_reset(assoc);
 521
 522         if (sr->username)
 523         {
 524             Z_IdAuthentication *auth = odr_malloc(assoc->decode, sizeof(*auth));
 525             int len;
 526
 527             len = strlen(sr->username) + 1;
 528             if (sr->password)
 529                 len += strlen(sr->password) + 2;
 530             auth->which = Z_IdAuthentication_open;
 531             auth->u.open = odr_malloc(assoc->decode, len);
 532             strcpy(auth->u.open, sr->username);
 533             if (sr->password && *sr->password)
 534             {
 535                 strcat(auth->u.open, "/");
 536                 strcat(auth->u.open, sr->password);
 537             }
 538             assoc->init->auth = auth;
 539         }
 540
 541 #if 1
 542         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 543         assoc->init->charneg_request = ce->u.charNeg3;
 544 #endif
 545         assoc->backend = 0;
 546         if (!(binitres = (*cb->bend_init)(assoc->init)))
 547         {
 548             assoc->state = ASSOC_DEAD;
 549             yaz_add_srw_diagnostic(assoc->encode, d, num,
 550                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 551             return 0;
 552         }
 553         assoc->backend = binitres->handle;
 554         assoc->init->auth = 0;
 555         if (binitres->errcode)
 556         {
 557             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 558             assoc->state = ASSOC_DEAD;
 559             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 560                                    binitres->errstring);
 561             return 0;
 562         }
 563         return 1;
 564     }
 565     return 1;
 566 }
 567
 568 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 569 {
 570 #if YAZ_HAVE_XML2
 571     yaz_record_conv_t rc = 0;
 572     const char *match_schema = 0;
 573     int *match_syntax = 0;
 574
 575     if (assoc->server)
 576     {
 577         int r;
 578         const char *input_schema = yaz_get_esn(rr->comp);
 579         Odr_oid *input_syntax_raw = rr->request_format_raw;
 580
 581         const char *backend_schema = 0;
 582         Odr_oid *backend_syntax = 0;
 583
 584         r = yaz_retrieval_request(assoc->server->retrieval,
 585                                   input_schema,
 586                                   input_syntax_raw,
 587                                   &match_schema,
 588                                   &match_syntax,
 589                                   &rc,
 590                                   &backend_schema,
 591                                   &backend_syntax);
 592         if (r == -1) /* error ? */
 593         {
 594             const char *details = yaz_retrieval_get_error(
 595                 assoc->server->retrieval);
 596
 597             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 598             if (details)
 599                 rr->errstring = odr_strdup(rr->stream, details);
 600             return -1;
 601         }
 602         else if (r == 1 || r == 3)
 603         {
 604             const char *details = input_schema;
 605             rr->errcode =  YAZ_BIB1_ELEMENT_SET_NAMES_UNSUPP;
 606             if (details)
 607                 rr->errstring = odr_strdup(rr->stream, details);
 608             return -1;
 609         }
 610         else if (r == 2)
 611         {
 612             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 613             if (input_syntax_raw)
 614             {
 615                 char oidbuf[OID_STR_MAX];
 616                 oid_to_dotstring(input_syntax_raw, oidbuf);
 617                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 618             }
 619             return -1;
 620         }
 621         if (backend_schema)
 622         {
 623             yaz_set_esn(&rr->comp, backend_schema, rr->stream->mem);
 624         }
 625         if (backend_syntax)
 626         {
 627             oident *oident_syntax = oid_getentbyoid(backend_syntax);
 628
 629             rr->request_format_raw = backend_syntax;
 630
 631             if (oident_syntax)
 632                 rr->request_format = oident_syntax->value;
 633             else
 634                 rr->request_format = VAL_NONE;
 635         }
 636     }
 637     (*assoc->init->bend_fetch)(assoc->backend, rr);
 638     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
 639     {   /* post conversion must take place .. */
 640         WRBUF output_record = wrbuf_alloc();
 641         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 642         if (r)
 643         {
 644             const char *details = yaz_record_conv_get_error(rc);
 645             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 646             if (details)
 647                 rr->errstring = odr_strdup(rr->stream, details);
 648         }
 649         else
 650         {
 651             rr->len = wrbuf_len(output_record);
 652             rr->record = odr_malloc(rr->stream, rr->len);
 653             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 654         }
 655         wrbuf_free(output_record, 1);
 656     }
 657     if (match_syntax)
 658     {
 659         struct oident *oi = oid_getentbyoid(match_syntax);
 660         rr->output_format = oi ? oi->value : VAL_NONE;
 661         rr->output_format_raw = match_syntax;
 662     }
 663     if (match_schema)
 664         rr->schema = odr_strdup(rr->stream, match_schema);
 665     return 0;
 666 #else
 667     (*assoc->init->bend_fetch)(assoc->backend, rr);
 668 #endif
 669 }
 670
 671 static int srw_bend_fetch(association *assoc, int pos,
 672                           Z_SRW_searchRetrieveRequest *srw_req,
 673                           Z_SRW_record *record,
 674                           const char **addinfo)
 675 {
 676     bend_fetch_rr rr;
 677     ODR o = assoc->encode;
 678
 679     rr.setname = "default";
 680     rr.number = pos;
 681     rr.referenceId = 0;
 682     rr.request_format = VAL_TEXT_XML;
 683     rr.request_format_raw = yaz_oidval_to_z3950oid(assoc->decode,
 684                                                    CLASS_RECSYN,
 685                                                    VAL_TEXT_XML);
 686     rr.comp = (Z_RecordComposition *)
 687             odr_malloc(assoc->decode, sizeof(*rr.comp));
 688     rr.comp->which = Z_RecordComp_complex;
 689     rr.comp->u.complex = (Z_CompSpec *)
 690             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 691     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 692         odr_malloc(assoc->encode, sizeof(bool_t));
 693     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 694     rr.comp->u.complex->num_dbSpecific = 0;
 695     rr.comp->u.complex->dbSpecific = 0;
 696     rr.comp->u.complex->num_recordSyntax = 0;
 697     rr.comp->u.complex->recordSyntax = 0;
 698
 699     rr.comp->u.complex->generic = (Z_Specification *)
 700             odr_malloc(assoc->decode, sizeof(Z_Specification));
 701
 702     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 703     rr.comp->u.complex->generic->which = Z_Schema_uri;
 704     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 705
 706     /* ESN = recordSchema if recordSchema is present */
 707     rr.comp->u.complex->generic->elementSpec = 0;
 708     if (srw_req->recordSchema)
 709     {
 710         rr.comp->u.complex->generic->elementSpec =
 711             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 712         rr.comp->u.complex->generic->elementSpec->which =
 713             Z_ElementSpec_elementSetName;
 714         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 715             srw_req->recordSchema;
 716     }
 717
 718     rr.stream = assoc->encode;
 719     rr.print = assoc->print;
 720
 721     rr.basename = 0;
 722     rr.len = 0;
 723     rr.record = 0;
 724     rr.last_in_set = 0;
 725     rr.errcode = 0;
 726     rr.errstring = 0;
 727     rr.surrogate_flag = 0;
 728     rr.schema = srw_req->recordSchema;
 729
 730     if (!assoc->init->bend_fetch)
 731         return 1;
 732
 733     retrieve_fetch(assoc, &rr);
 734
 735     if (rr.errcode && rr.surrogate_flag)
 736     {
 737         int code = yaz_diag_bib1_to_srw(rr.errcode);
 738         const char *message = yaz_diag_srw_str(code);
 739         int len = 200;
 740         if (message)
 741             len += strlen(message);
 742         if (rr.errstring)
 743             len += strlen(rr.errstring);
 744
 745         record->recordData_buf = odr_malloc(o, len);
 746
 747         sprintf(record->recordData_buf, "<diagnostic "
 748                 "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
 749                 " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
 750         if (rr.errstring)
 751             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 752                     " <details>%s</details>\n", rr.errstring);
 753         if (message)
 754             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 755                     " <message>%s</message>\n", message);
 756         sprintf(record->recordData_buf + strlen(record->recordData_buf),
 757                 "</diagnostic>\n");
 758         record->recordData_len = strlen(record->recordData_buf);
 759         record->recordPosition = odr_intdup(o, pos);
 760         record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
 761         return 0;
 762     }
 763     else if (rr.len >= 0)
 764     {
 765         record->recordData_buf = rr.record;
 766         record->recordData_len = rr.len;
 767         record->recordPosition = odr_intdup(o, pos);
 768         if (rr.schema)
 769             record->recordSchema = odr_strdup(o, rr.schema);
 770         else
 771             record->recordSchema = 0;
 772     }
 773     if (rr.errcode)
 774     {
 775         *addinfo = rr.errstring;
 776         return rr.errcode;
 777     }
 778     return 0;
 779 }
 780
 781 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 782                    Z_Query *query_result)
 783 {
 784     /* have a CQL query and  CQL to PQF transform .. */
 785     CQL_parser cp = cql_parser_create();
 786     int r;
 787     int srw_errcode = 0;
 788     const char *add = 0;
 789     char rpn_buf[5120];
 790
 791     r = cql_parser_string(cp, cql);
 792     if (r)
 793     {
 794         /* CQL syntax error */
 795         srw_errcode = 10;
 796     }
 797     if (!r)
 798     {
 799         /* Syntax OK */
 800         r = cql_transform_buf(ct,
 801                               cql_parser_result(cp),
 802                               rpn_buf, sizeof(rpn_buf)-1);
 803         if (r)
 804             srw_errcode  = cql_transform_error(ct, &add);
 805     }
 806     if (!r)
 807     {
 808         /* Syntax & transform OK. */
 809         /* Convert PQF string to Z39.50 to RPN query struct */
 810         YAZ_PQF_Parser pp = yaz_pqf_create();
 811         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 812         if (!rpnquery)
 813         {
 814             size_t off;
 815             const char *pqf_msg;
 816             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 817             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 818                     pqf_msg, code);
 819             srw_errcode = 10;
 820         }
 821         else
 822         {
 823             query_result->which = Z_Query_type_1;
 824             query_result->u.type_1 = rpnquery;
 825         }
 826         yaz_pqf_destroy(pp);
 827     }
 828     cql_parser_destroy(cp);
 829     return srw_errcode;
 830 }
 831
 832 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 833                         Z_AttributesPlusTerm *result)
 834 {
 835     Z_Query query;
 836     Z_RPNQuery *rpn;
 837     int srw_error = cql2pqf(odr, cql, ct, &query);
 838     if (srw_error)
 839         return srw_error;
 840     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 841         return 10; /* bad query type */
 842     rpn = query.u.type_1;
 843     if (!rpn->RPNStructure)
 844         return 10; /* must be structure */
 845     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 846         return 10; /* must be simple */
 847     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 848         return 10; /* must be attributes plus term node .. */
 849     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 850            sizeof(*result));
 851     return 0;
 852 }
 853
 854 static void srw_bend_search(association *assoc, request *req,
 855                             Z_SRW_PDU *sr,
 856                             Z_SRW_searchRetrieveResponse *srw_res,
 857                             int *http_code)
 858 {
 859     int srw_error = 0;
 860     Z_External *ext;
 861     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 862
 863     *http_code = 200;
 864     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 865     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 866     if (srw_res->num_diagnostics == 0 && assoc->init)
 867     {
 868         bend_search_rr rr;
 869         rr.setname = "default";
 870         rr.replace_set = 1;
 871         rr.num_bases = 1;
 872         rr.basenames = &srw_req->database;
 873         rr.referenceId = 0;
 874         rr.srw_sortKeys = 0;
 875         rr.srw_setname = 0;
 876         rr.srw_setnameIdleTime = 0;
 877         rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 878         rr.query->u.type_1 = 0;
 879
 880         if (srw_req->query_type == Z_SRW_query_type_cql)
 881         {
 882             if (assoc->server && assoc->server->cql_transform)
 883             {
 884                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 885                                           assoc->server->cql_transform,
 886                                           rr.query);
 887                 if (srw_errcode)
 888                 {
 889                     yaz_add_srw_diagnostic(assoc->encode,
 890                                            &srw_res->diagnostics,
 891                                            &srw_res->num_diagnostics,
 892                                            srw_errcode, 0);
 893                 }
 894             }
 895             else
 896             {
 897                 /* CQL query to backend. Wrap it - Z39.50 style */
 898                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 899                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 900                                                         "1.2.840.10003.16.2");
 901                 ext->indirect_reference = 0;
 902                 ext->descriptor = 0;
 903                 ext->which = Z_External_CQL;
 904                 ext->u.cql = srw_req->query.cql;
 905
 906                 rr.query->which = Z_Query_type_104;
 907                 rr.query->u.type_104 =  ext;
 908             }
 909         }
 910         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 911         {
 912             Z_RPNQuery *RPNquery;
 913             YAZ_PQF_Parser pqf_parser;
 914
 915             pqf_parser = yaz_pqf_create ();
 916
 917             RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
 918                                       srw_req->query.pqf);
 919             if (!RPNquery)
 920             {
 921                 const char *pqf_msg;
 922                 size_t off;
 923                 int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
 924                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 925                         code, pqf_msg, (long) off);
 926                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 927             }
 928
 929             rr.query->which = Z_Query_type_1;
 930             rr.query->u.type_1 =  RPNquery;
 931
 932             yaz_pqf_destroy (pqf_parser);
 933         }
 934         else
 935         {
 936             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 937                                    &srw_res->num_diagnostics,
 938                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 939         }
 940         if (rr.query->u.type_1)
 941         {
 942             rr.stream = assoc->encode;
 943             rr.decode = assoc->decode;
 944             rr.print = assoc->print;
 945             rr.request = req;
 946             if ( srw_req->sort.sortKeys )
 947                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 948                                              srw_req->sort.sortKeys );
 949             rr.association = assoc;
 950             rr.fd = 0;
 951             rr.hits = 0;
 952             rr.errcode = 0;
 953             rr.errstring = 0;
 954             rr.search_info = 0;
 955             yaz_log_zquery_level(log_requestdetail,rr.query);
 956
 957             (assoc->init->bend_search)(assoc->backend, &rr);
 958             if (rr.errcode)
 959             {
 960                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 961                 {
 962                     *http_code = 404;
 963                 }
 964                 else
 965                 {
 966                     srw_error = yaz_diag_bib1_to_srw (rr.errcode);
 967                     yaz_add_srw_diagnostic(assoc->encode,
 968                                            &srw_res->diagnostics,
 969                                            &srw_res->num_diagnostics,
 970                                            srw_error, rr.errstring);
 971                 }
 972             }
 973             else
 974             {
 975                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
 976                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
 977
 978                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
 979                         start, number, rr.hits);
 980
 981                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 982                 if (rr.srw_setname)
 983                 {
 984                     srw_res->resultSetId =
 985                         odr_strdup(assoc->encode, rr.srw_setname );
 986                     srw_res->resultSetIdleTime =
 987                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
 988                 }
 989
 990                 if ((rr.hits > 0 && start > rr.hits) || start < 1)
 991                 {
 992                     yaz_add_srw_diagnostic(
 993                         assoc->encode,
 994                         &srw_res->diagnostics, &srw_res->num_diagnostics,
 995                         YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
 996                 }
 997                 else if (number > 0)
 998                 {
 999                     int i;
1000                     int ok = 1;
1001                     if (start + number > rr.hits)
1002                         number = rr.hits - start + 1;
1003
1004                     /* Call bend_present if defined */
1005                     if (assoc->init->bend_present)
1006                     {
1007                         bend_present_rr *bprr = (bend_present_rr*)
1008                             odr_malloc (assoc->decode, sizeof(*bprr));
1009                         bprr->setname = "default";
1010                         bprr->start = start;
1011                         bprr->number = number;
1012                         bprr->format = VAL_TEXT_XML;
1013                         if (srw_req->recordSchema)
1014                         {
1015                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1016                                                                             sizeof(*bprr->comp));
1017                             bprr->comp->which = Z_RecordComp_simple;
1018                             bprr->comp->u.simple = (Z_ElementSetNames *)
1019                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1020                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1021                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1022                         }
1023                         else
1024                         {
1025                             bprr->comp = 0;
1026                         }
1027                         bprr->stream = assoc->encode;
1028                         bprr->referenceId = 0;
1029                         bprr->print = assoc->print;
1030                         bprr->request = req;
1031                         bprr->association = assoc;
1032                         bprr->errcode = 0;
1033                         bprr->errstring = NULL;
1034                         (*assoc->init->bend_present)(assoc->backend, bprr);
1035
1036                         if (!bprr->request)
1037                             return;
1038                         if (bprr->errcode)
1039                         {
1040                             srw_error = yaz_diag_bib1_to_srw (bprr->errcode);
1041                             yaz_add_srw_diagnostic(assoc->encode,
1042                                                    &srw_res->diagnostics,
1043                                                    &srw_res->num_diagnostics,
1044                                                    srw_error, bprr->errstring);
1045                             ok = 0;
1046                         }
1047                     }
1048
1049                     if (ok)
1050                     {
1051                         int j = 0;
1052                         int packing = Z_SRW_recordPacking_string;
1053                         if (srw_req->recordPacking){
1054                             if (!strcmp(srw_req->recordPacking, "xml"))
1055                                 packing = Z_SRW_recordPacking_XML;
1056                             if (!strcmp(srw_req->recordPacking, "url"))
1057                                 packing = Z_SRW_recordPacking_URL;
1058                         }
1059                         srw_res->records = (Z_SRW_record *)
1060                             odr_malloc(assoc->encode,
1061                                        number * sizeof(*srw_res->records));
1062
1063                         srw_res->extra_records = (Z_SRW_extra_record **)
1064                             odr_malloc(assoc->encode,
1065                                        number*sizeof(*srw_res->extra_records));
1066
1067                         for (i = 0; i<number; i++)
1068                         {
1069                             int errcode;
1070                             const char *addinfo = 0;
1071
1072                             srw_res->records[j].recordPacking = packing;
1073                             srw_res->records[j].recordData_buf = 0;
1074                             srw_res->extra_records[j] = 0;
1075                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1076                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1077                                                      srw_res->records + j,
1078                                                      &addinfo);
1079                             if (errcode)
1080                             {
1081                                 yaz_add_srw_diagnostic(assoc->encode,
1082                                                        &srw_res->diagnostics,
1083                                                        &srw_res->num_diagnostics,
1084                                                        yaz_diag_bib1_to_srw (errcode),
1085                                                        addinfo);
1086
1087                                 break;
1088                             }
1089                             if (srw_res->records[j].recordData_buf)
1090                                 j++;
1091                         }
1092                         srw_res->num_records = j;
1093                         if (!j)
1094                             srw_res->records = 0;
1095                     }
1096                 }
1097             }
1098         }
1099     }
1100     if (log_request)
1101     {
1102         const char *querystr = "?";
1103         const char *querytype = "?";
1104         WRBUF wr = wrbuf_alloc();
1105
1106         switch (srw_req->query_type)
1107         {
1108         case Z_SRW_query_type_cql:
1109             querytype = "CQL";
1110             querystr = srw_req->query.cql;
1111             break;
1112         case Z_SRW_query_type_pqf:
1113             querytype = "PQF";
1114             querystr = srw_req->query.pqf;
1115             break;
1116         }
1117         wrbuf_printf(wr, "SRWSearch ");
1118         wrbuf_printf(wr, srw_req->database);
1119         wrbuf_printf(wr, " ");
1120         if (srw_res->num_diagnostics)
1121             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1122         else if (*http_code != 200)
1123             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1124         else if (srw_res->numberOfRecords)
1125         {
1126             wrbuf_printf(wr, "OK %d",
1127                          (srw_res->numberOfRecords ?
1128                           *srw_res->numberOfRecords : 0));
1129         }
1130         wrbuf_printf(wr, " %s %d+%d",
1131                      (srw_res->resultSetId ?
1132                       srw_res->resultSetId : "-"),
1133                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1134                      srw_res->num_records);
1135         yaz_log(log_request, "%s %s: %s", wrbuf_buf(wr), querytype, querystr);
1136         wrbuf_free(wr, 1);
1137     }
1138 }
1139
1140 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1141 {
1142 #if YAZ_HAVE_XML2
1143     xmlNodePtr ptr = rr->server_node_ptr;
1144     if (!ptr)
1145         return 0;
1146     for (ptr = ptr->children; ptr; ptr = ptr->next)
1147     {
1148         if (ptr->type != XML_ELEMENT_NODE)
1149             continue;
1150         if (!strcmp((const char *) ptr->name, "explain"))
1151         {
1152             int len;
1153             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1154             xmlChar *buf_out;
1155             char *content;
1156
1157             ptr = xmlCopyNode(ptr, 1);
1158
1159             xmlDocSetRootElement(doc, ptr);
1160
1161             xmlDocDumpMemory(doc, &buf_out, &len);
1162             content = (char*) odr_malloc(rr->stream, 1+len);
1163             memcpy(content, buf_out, len);
1164             content[len] = '\0';
1165
1166             xmlFree(buf_out);
1167             xmlFreeDoc(doc);
1168             rr->explain_buf = content;
1169             return 0;
1170         }
1171     }
1172 #endif
1173     return 0;
1174 }
1175
1176 static void srw_bend_explain(association *assoc, request *req,
1177                              Z_SRW_PDU *sr,
1178                              Z_SRW_explainResponse *srw_res,
1179                              int *http_code)
1180 {
1181     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1182     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1183     *http_code = 404;
1184     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1185     if (assoc->init)
1186     {
1187         bend_explain_rr rr;
1188
1189         rr.stream = assoc->encode;
1190         rr.decode = assoc->decode;
1191         rr.print = assoc->print;
1192         rr.explain_buf = 0;
1193         rr.database = srw_req->database;
1194         if (assoc->server)
1195             rr.server_node_ptr = assoc->server->server_node_ptr;
1196         else
1197             rr.server_node_ptr = 0;
1198         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1199         if (assoc->init->bend_explain)
1200             (*assoc->init->bend_explain)(assoc->backend, &rr);
1201         else
1202             srw_bend_explain_default(assoc->backend, &rr);
1203
1204         if (rr.explain_buf)
1205         {
1206             int packing = Z_SRW_recordPacking_string;
1207             if (srw_req->recordPacking)
1208             {
1209                 if (!strcmp(srw_req->recordPacking, "xml"))
1210                     packing = Z_SRW_recordPacking_XML;
1211                 else if (!strcmp(srw_req->recordPacking, "url"))
1212                     packing = Z_SRW_recordPacking_URL;
1213             }
1214             srw_res->record.recordSchema = rr.schema;
1215             srw_res->record.recordPacking = packing;
1216             srw_res->record.recordData_buf = rr.explain_buf;
1217             srw_res->record.recordData_len = strlen(rr.explain_buf);
1218             srw_res->record.recordPosition = 0;
1219             *http_code = 200;
1220         }
1221     }
1222 }
1223
1224 static void srw_bend_scan(association *assoc, request *req,
1225                           Z_SRW_PDU *sr,
1226                           Z_SRW_scanResponse *srw_res,
1227                           int *http_code)
1228 {
1229     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1230     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1231
1232     *http_code = 200;
1233     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1234     if (srw_res->num_diagnostics == 0 && assoc->init)
1235     {
1236         struct scan_entry *save_entries;
1237
1238         bend_scan_rr *bsrr = (bend_scan_rr *)
1239             odr_malloc (assoc->encode, sizeof(*bsrr));
1240         bsrr->num_bases = 1;
1241         bsrr->basenames = &srw_req->database;
1242
1243         bsrr->num_entries = srw_req->maximumTerms ?
1244             *srw_req->maximumTerms : 10;
1245         bsrr->term_position = srw_req->responsePosition ?
1246             *srw_req->responsePosition : 1;
1247
1248         bsrr->errcode = 0;
1249         bsrr->errstring = 0;
1250         bsrr->referenceId = 0;
1251         bsrr->stream = assoc->encode;
1252         bsrr->print = assoc->print;
1253         bsrr->step_size = odr_intdup(assoc->decode, 0);
1254         bsrr->entries = 0;
1255
1256         if (bsrr->num_entries > 0)
1257         {
1258             int i;
1259             bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1260                                        bsrr->num_entries);
1261             for (i = 0; i<bsrr->num_entries; i++)
1262             {
1263                 bsrr->entries[i].term = 0;
1264                 bsrr->entries[i].occurrences = 0;
1265                 bsrr->entries[i].errcode = 0;
1266                 bsrr->entries[i].errstring = 0;
1267                 bsrr->entries[i].display_term = 0;
1268             }
1269         }
1270         save_entries = bsrr->entries;  /* save it so we can compare later */
1271
1272         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1273             assoc->init->bend_scan)
1274         {
1275             Odr_oid *scan_attributeSet = 0;
1276             oident *attset;
1277             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1278
1279             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1280                                       &scan_attributeSet,
1281                                       srw_req->scanClause.pqf);
1282             if (scan_attributeSet &&
1283                 (attset = oid_getentbyoid(scan_attributeSet)) &&
1284                 (attset->oclass == CLASS_ATTSET ||
1285                  attset->oclass == CLASS_GENERAL))
1286                 bsrr->attributeset = attset->value;
1287             else
1288                 bsrr->attributeset = VAL_NONE;
1289             yaz_pqf_destroy(pqf_parser);
1290             bsrr->scanClause = 0;
1291             ((int (*)(void *, bend_scan_rr *))
1292              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1293         }
1294         else if (srw_req->query_type == Z_SRW_query_type_cql
1295                  && assoc->init->bend_scan && assoc->server
1296                  && assoc->server->cql_transform)
1297         {
1298             int srw_error;
1299             bsrr->scanClause = 0;
1300             bsrr->attributeset = VAL_NONE;
1301             bsrr->term = odr_malloc(assoc->decode, sizeof(*bsrr->term));
1302             srw_error = cql2pqf_scan(assoc->encode,
1303                                      srw_req->scanClause.cql,
1304                                      assoc->server->cql_transform,
1305                                      bsrr->term);
1306             if (srw_error)
1307                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1308                                        &srw_res->num_diagnostics,
1309                                        srw_error, 0);
1310             else
1311             {
1312                 ((int (*)(void *, bend_scan_rr *))
1313                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1314             }
1315         }
1316         else if (srw_req->query_type == Z_SRW_query_type_cql
1317                  && assoc->init->bend_srw_scan)
1318         {
1319             bsrr->term = 0;
1320             bsrr->attributeset = VAL_NONE;
1321             bsrr->scanClause = srw_req->scanClause.cql;
1322             ((int (*)(void *, bend_scan_rr *))
1323              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1324         }
1325         else
1326         {
1327             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1328                                    &srw_res->num_diagnostics,
1329                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1330         }
1331         if (bsrr->errcode)
1332         {
1333             int srw_error;
1334             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1335             {
1336                 *http_code = 404;
1337                 return;
1338             }
1339             srw_error = yaz_diag_bib1_to_srw (bsrr->errcode);
1340
1341             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1342                                    &srw_res->num_diagnostics,
1343                                    srw_error, bsrr->errstring);
1344         }
1345         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1346         {
1347             int i;
1348             srw_res->terms = (Z_SRW_scanTerm*)
1349                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1350                            bsrr->num_entries);
1351
1352             srw_res->num_terms =  bsrr->num_entries;
1353             for (i = 0; i<bsrr->num_entries; i++)
1354             {
1355                 Z_SRW_scanTerm *t = srw_res->terms + i;
1356                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1357                 t->numberOfRecords =
1358                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1359                 t->displayTerm = 0;
1360                 if (save_entries == bsrr->entries &&
1361                     bsrr->entries[i].display_term)
1362                 {
1363                     /* the entries was _not_ set by the handler. So it's
1364                        safe to test for new member display_term. It is
1365                        NULL'ed by us.
1366                     */
1367                     t->displayTerm = odr_strdup(assoc->encode,
1368                                                 bsrr->entries[i].display_term);
1369                 }
1370                 t->whereInList = 0;
1371             }
1372         }
1373     }
1374     if (log_request)
1375     {
1376         WRBUF wr = wrbuf_alloc();
1377         const char *querytype = 0;
1378         const char *querystr = 0;
1379
1380         switch(srw_req->query_type)
1381         {
1382         case Z_SRW_query_type_pqf:
1383             querytype = "PQF";
1384             querystr = srw_req->scanClause.pqf;
1385             break;
1386         case Z_SRW_query_type_cql:
1387             querytype = "CQL";
1388             querystr = srw_req->scanClause.cql;
1389             break;
1390         default:
1391             querytype = "UNKNOWN";
1392             querystr = "";
1393         }
1394
1395         wrbuf_printf(wr, "SRWScan ");
1396         wrbuf_printf(wr, srw_req->database);
1397         wrbuf_printf(wr, " ");
1398
1399         if (srw_res->num_diagnostics)
1400             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1401         else if (srw_res->num_terms)
1402             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1403         else
1404             wrbuf_printf(wr, "OK - - ");
1405
1406         wrbuf_printf(wr, "%d+%d+0 ",
1407                      (srw_req->responsePosition ?
1408                       *srw_req->responsePosition : 1),
1409                      (srw_req->maximumTerms ?
1410                       *srw_req->maximumTerms : 1));
1411         /* there is no step size in SRU/W ??? */
1412         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1413         yaz_log(log_request, "%s ", wrbuf_buf(wr) );
1414         wrbuf_free(wr, 1);
1415     }
1416
1417 }
1418
1419 static void srw_bend_update(association *assoc, request *req,
1420                             Z_SRW_PDU *sr,
1421                             Z_SRW_updateResponse *srw_res,
1422                             int *http_code)
1423 {
1424     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1425     yaz_log(YLOG_DEBUG, "Got SRW UpdateRequest");
1426     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1427     *http_code = 404;
1428     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1429     if (assoc->init)
1430     {
1431         bend_update_rr rr;
1432
1433         rr.stream = assoc->encode;
1434         rr.print = assoc->print;
1435         rr.num_bases = 1;
1436         rr.basenames = &srw_req->database;
1437         rr.operation = srw_req->operation;
1438         rr.operation_status = "failed";
1439         rr.record_id = 0;
1440         rr.record_version = 0;
1441         rr.record_checksum = 0;
1442         rr.record_old_version = 0;
1443         rr.record_packing = "xml";
1444         rr.record_schema = 0;
1445         rr.record_data = 0;
1446         rr.request_extra_record = 0;
1447         rr.response_extra_record = 0;
1448         rr.extra_request_data = 0;
1449         rr.extra_response_data = 0;
1450         rr.uri = 0;
1451         rr.message = 0;
1452         rr.details = 0;
1453
1454         if ( rr.operation == 0 ){
1455             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1456                                           &srw_res->num_diagnostics,
1457                                           9, "action" );
1458             return;
1459         }
1460         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1461         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1462         if ( !strcmp( rr.operation, "delete" ) ){
1463             if ( !srw_req->recordId ){
1464                 if ( srw_req->record.recordData_len ){
1465                     if ( srw_req->record.recordSchema == 0 ){
1466                         yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1467                                                       &srw_res->num_diagnostics,
1468                                                       9, "recordSchema" );
1469                     }
1470                     else {
1471                         rr.record_schema = odr_strdup(assoc->encode,
1472                                                       srw_req->record.recordSchema );
1473                     }
1474                     switch (srw_req->record.recordPacking)
1475                         {
1476                         case Z_SRW_recordPacking_string:
1477                             rr.record_packing = "string";
1478                             break;
1479                         case Z_SRW_recordPacking_XML:
1480                             rr.record_packing = "xml";
1481                             break;
1482                         case Z_SRW_recordPacking_URL:
1483                             rr.record_packing = "url";
1484                             break;
1485                         }
1486                     rr.record_data = odr_strdupn(assoc->encode,
1487                                                  srw_req->record.recordData_buf,
1488                                                  srw_req->record.recordData_len );
1489                     rr.request_extra_record = srw_req->extra_record;
1490                 }
1491                 else {
1492                     yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1493                                                   &srw_res->num_diagnostics,
1494                                                   9, "recordIdentifier OR recordData" );
1495                 }
1496             }
1497             else {
1498                 rr.record_id = srw_req->recordId;
1499                 if ( srw_req->record.recordData_len ){
1500                     yaz_add_sru_update_diagnostic(assoc->encode,
1501                                                   &srw_res->diagnostics,
1502                                                   &srw_res->num_diagnostics,
1503                                                   9, "recordData" );
1504                 }
1505             }
1506             if (  srw_req->recordVersion ){
1507                 rr.record_version = odr_strdup( assoc->encode,
1508                                                 srw_req->recordVersion );
1509
1510             }
1511             if ( srw_req->recordOldVersion ){
1512                 rr.record_old_version = odr_strdup(assoc->encode,
1513                                                    srw_req->recordOldVersion );
1514             }
1515             if ( srw_req->extraRequestData ){
1516                 rr.extra_request_data = odr_strdup(assoc->encode,
1517                                                    srw_req->extraRequestData );
1518             }
1519         }
1520         else if ( !strcmp( rr.operation, "replace" ) ){
1521             if ( !srw_req->recordId ){
1522                 yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1523                                               &srw_res->num_diagnostics,
1524                                               9, "recordIdentifier" );
1525             }
1526             else {
1527                 rr.record_id = srw_req->recordId;
1528             }
1529             if ( srw_req->record.recordSchema == 0 ){
1530                 yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1531                                               &srw_res->num_diagnostics,
1532                                               9, "recordSchema" );
1533             }
1534             else {
1535                 rr.record_schema = odr_strdup(assoc->encode,
1536                                               srw_req->record.recordSchema );
1537             }
1538             switch (srw_req->record.recordPacking)
1539             {
1540             case Z_SRW_recordPacking_string:
1541                 rr.record_packing = "string";
1542                 break;
1543             case Z_SRW_recordPacking_XML:
1544                 rr.record_packing = "xml";
1545                 break;
1546             case Z_SRW_recordPacking_URL:
1547                 rr.record_packing = "url";
1548                 break;
1549             }
1550             if ( srw_req->record.recordData_len ){
1551                 rr.record_data = odr_strdupn(assoc->encode,
1552                                              srw_req->record.recordData_buf,
1553                                              srw_req->record.recordData_len );
1554                 rr.request_extra_record = srw_req->extra_record;
1555             }
1556             else {
1557                 yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1558                                               &srw_res->num_diagnostics,
1559                                               9, "recordData" );
1560             }
1561             if (srw_req->extraRequestData)
1562                 rr.extra_request_data = odr_strdup(assoc->encode,
1563                                                    srw_req->extraRequestData );
1564         }
1565         else if (!strcmp( rr.operation, "insert" ) ) {
1566             rr.record_id = srw_req->recordId;
1567             if ( srw_req->record.recordSchema == 0 ){
1568                 yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1569                                               &srw_res->num_diagnostics,
1570                                               9, "recordSchema" );
1571             }
1572             else {
1573                 rr.record_schema = odr_strdup(assoc->encode,
1574                                               srw_req->record.recordSchema);
1575             }
1576             switch (srw_req->record.recordPacking)
1577             {
1578             case Z_SRW_recordPacking_string:
1579                 rr.record_packing = "string";
1580                 break;
1581             case Z_SRW_recordPacking_XML:
1582                 rr.record_packing = "xml";
1583                 break;
1584             case Z_SRW_recordPacking_URL:
1585                 rr.record_packing = "url";
1586                 break;
1587             }
1588
1589             if (srw_req->record.recordData_len)
1590             {
1591                 rr.record_data = odr_strdupn(assoc->encode,
1592                                              srw_req->record.recordData_buf,
1593                                              srw_req->record.recordData_len );
1594                 rr.request_extra_record = srw_req->extra_record;
1595             }
1596             else
1597                 yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1598                                              &srw_res->num_diagnostics,
1599                                              9, "recordData" );
1600             if ( srw_req->extraRequestData )
1601                 rr.extra_request_data = odr_strdup(assoc->encode,
1602                                                    srw_req->extraRequestData );
1603         }
1604         else {
1605             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1606                                           &srw_res->num_diagnostics,
1607                                           100, rr.operation );
1608         }
1609         if (srw_res->num_diagnostics == 0)
1610         {
1611             if ( assoc->init->bend_srw_update)
1612                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1613             else {
1614                 yaz_log( YLOG_WARN, "Got No Update function!");
1615                 return;
1616             }
1617         }
1618
1619         if (rr.uri)
1620             yaz_add_srw_diagnostic_uri(assoc->encode,
1621                                        &srw_res->diagnostics,
1622                                        &srw_res->num_diagnostics,
1623                                        rr.uri,
1624                                        rr.message,
1625                                        rr.details);
1626         srw_res->recordId = rr.record_id;
1627         srw_res->operationStatus = rr.operation_status;
1628         srw_res->recordVersion = rr.record_version;
1629         srw_res->recordChecksum = rr.record_checksum;
1630         srw_res->extraResponseData = rr.extra_response_data;
1631         srw_res->record.recordPosition = 0;
1632         if (srw_res->num_diagnostics == 0 && rr.record_data)
1633         {
1634             srw_res->record.recordSchema = rr.record_schema;
1635             srw_res->record.recordPacking = srw_req->record.recordPacking;
1636             srw_res->record.recordData_buf = rr.record_data;
1637             srw_res->record.recordData_len = strlen(rr.record_data);
1638             srw_res->extra_record = rr.response_extra_record;
1639
1640         }
1641         else
1642             srw_res->record.recordData_len = 0;
1643         *http_code = 200;
1644     }
1645 }
1646
1647 /* check if path is OK (1); BAD (0) */
1648 static int check_path(const char *path)
1649 {
1650     if (*path != '/')
1651         return 0;
1652     if (strstr(path, ".."))
1653         return 0;
1654     return 1;
1655 }
1656
1657 static char *read_file(const char *fname, ODR o, int *sz)
1658 {
1659     char *buf;
1660     FILE *inf = fopen(fname, "rb");
1661     if (!inf)
1662         return 0;
1663
1664     fseek(inf, 0L, SEEK_END);
1665     *sz = ftell(inf);
1666     rewind(inf);
1667     buf = odr_malloc(o, *sz);
1668     fread(buf, 1, *sz, inf);
1669     fclose(inf);
1670     return buf;
1671 }
1672
1673 static void process_http_request(association *assoc, request *req)
1674 {
1675     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1676     ODR o = assoc->encode;
1677     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1678     Z_SRW_PDU *sr = 0;
1679     Z_SOAP *soap_package = 0;
1680     Z_GDU *p = 0;
1681     char *charset = 0;
1682     Z_HTTP_Response *hres = 0;
1683     int keepalive = 1;
1684     const char *stylesheet = 0; /* for now .. set later */
1685     Z_SRW_diagnostic *diagnostic = 0;
1686     int num_diagnostic = 0;
1687     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1688
1689     if (!control_association(assoc, host, 0))
1690     {
1691         p = z_get_HTTP_Response(o, 404);
1692         r = 1;
1693     }
1694     if (r == 2 && assoc->server && assoc->server->docpath
1695         && hreq->path[0] == '/'
1696         &&
1697         /* check if path is a proper prefix of documentroot */
1698         strncmp(hreq->path+1, assoc->server->docpath,
1699                 strlen(assoc->server->docpath))
1700         == 0)
1701     {
1702         if (!check_path(hreq->path))
1703         {
1704             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1705             p = z_get_HTTP_Response(o, 404);
1706         }
1707         else
1708         {
1709             int content_size = 0;
1710             char *content_buf = read_file(hreq->path+1, o, &content_size);
1711             if (!content_buf)
1712             {
1713                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1714                 p = z_get_HTTP_Response(o, 404);
1715             }
1716             else
1717             {
1718                 const char *ctype = 0;
1719                 yaz_mime_types types = yaz_mime_types_create();
1720
1721                 yaz_mime_types_add(types, "xsl", "application/xml");
1722                 yaz_mime_types_add(types, "xml", "application/xml");
1723                 yaz_mime_types_add(types, "css", "text/css");
1724                 yaz_mime_types_add(types, "html", "text/html");
1725                 yaz_mime_types_add(types, "htm", "text/html");
1726                 yaz_mime_types_add(types, "txt", "text/plain");
1727                 yaz_mime_types_add(types, "js", "application/x-javascript");
1728
1729                 yaz_mime_types_add(types, "gif", "image/gif");
1730                 yaz_mime_types_add(types, "png", "image/png");
1731                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1732                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1733
1734                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1735                 if (!ctype)
1736                 {
1737                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1738                     p = z_get_HTTP_Response(o, 404);
1739                 }
1740                 else
1741                 {
1742                     p = z_get_HTTP_Response(o, 200);
1743                     hres = p->u.HTTP_Response;
1744                     hres->content_buf = content_buf;
1745                     hres->content_len = content_size;
1746                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1747                 }
1748                 yaz_mime_types_destroy(types);
1749             }
1750         }
1751         r = 1;
1752     }
1753
1754     if (r == 2)
1755     {
1756         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1757         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1758     }
1759     if (r == 2)  /* not taken */
1760     {
1761         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1762                            &diagnostic, &num_diagnostic);
1763         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1764     }
1765     if (r == 0)  /* decode SRW/SRU OK .. */
1766     {
1767         int http_code = 200;
1768         if (sr->which == Z_SRW_searchRetrieve_request)
1769         {
1770             Z_SRW_PDU *res =
1771                 yaz_srw_get(assoc->encode, Z_SRW_searchRetrieve_response);
1772
1773             stylesheet = sr->u.request->stylesheet;
1774             if (num_diagnostic)
1775             {
1776                 res->u.response->diagnostics = diagnostic;
1777                 res->u.response->num_diagnostics = num_diagnostic;
1778             }
1779             else
1780             {
1781                 srw_bend_search(assoc, req, sr, res->u.response,
1782                                 &http_code);
1783             }
1784             if (http_code == 200)
1785                 soap_package->u.generic->p = res;
1786         }
1787         else if (sr->which == Z_SRW_explain_request)
1788         {
1789             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
1790             stylesheet = sr->u.explain_request->stylesheet;
1791             if (num_diagnostic)
1792             {
1793                 res->u.explain_response->diagnostics = diagnostic;
1794                 res->u.explain_response->num_diagnostics = num_diagnostic;
1795             }
1796             srw_bend_explain(assoc, req, sr,
1797                              res->u.explain_response, &http_code);
1798             if (http_code == 200)
1799                 soap_package->u.generic->p = res;
1800         }
1801         else if (sr->which == Z_SRW_scan_request)
1802         {
1803             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_scan_response);
1804             stylesheet = sr->u.scan_request->stylesheet;
1805             if (num_diagnostic)
1806             {
1807                 res->u.scan_response->diagnostics = diagnostic;
1808                 res->u.scan_response->num_diagnostics = num_diagnostic;
1809             }
1810             srw_bend_scan(assoc, req, sr,
1811                           res->u.scan_response, &http_code);
1812             if (http_code == 200)
1813                 soap_package->u.generic->p = res;
1814         }
1815         else if (sr->which == Z_SRW_update_request)
1816         {
1817             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_update_response);
1818             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1819             if (num_diagnostic)
1820             {
1821                 res->u.update_response->diagnostics = diagnostic;
1822                 res->u.update_response->num_diagnostics = num_diagnostic;
1823             }
1824             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1825             srw_bend_update(assoc, req, sr,
1826                             res->u.update_response, &http_code);
1827             if (http_code == 200)
1828                 soap_package->u.generic->p = res;
1829         }
1830         else
1831         {
1832             yaz_log(log_request, "SOAP ERROR");
1833             /* FIXME - what error, what query */
1834             http_code = 500;
1835             z_soap_error(assoc->encode, soap_package,
1836                          "SOAP-ENV:Client", "Bad method", 0);
1837         }
1838         if (http_code == 200 || http_code == 500)
1839         {
1840             static Z_SOAP_Handler soap_handlers[4] = {
1841 #if YAZ_HAVE_XML2
1842                 {"http://www.loc.gov/zing/srw/", 0,
1843                  (Z_SOAP_fun) yaz_srw_codec},
1844                 {"http://www.loc.gov/zing/srw/v1.0/", 0,
1845                  (Z_SOAP_fun) yaz_srw_codec},
1846                 {"http://www.loc.gov/zing/srw/update/", 0,
1847                  (Z_SOAP_fun) yaz_ucp_codec},
1848 #endif
1849                 {0, 0, 0}
1850             };
1851             char ctype[60];
1852             int ret;
1853             p = z_get_HTTP_Response(o, 200);
1854             hres = p->u.HTTP_Response;
1855
1856             if (!stylesheet && assoc->server)
1857                 stylesheet = assoc->server->stylesheet;
1858
1859             /* empty stylesheet means NO stylesheet */
1860             if (stylesheet && *stylesheet == '\0')
1861                 stylesheet = 0;
1862
1863             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1864                                        &hres->content_buf, &hres->content_len,
1865                                        soap_handlers, charset, stylesheet);
1866             hres->code = http_code;
1867
1868             strcpy(ctype, "text/xml");
1869             if (charset)
1870             {
1871                 strcat(ctype, "; charset=");
1872                 strcat(ctype, charset);
1873             }
1874             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1875         }
1876         else
1877             p = z_get_HTTP_Response(o, http_code);
1878     }
1879
1880     if (p == 0)
1881         p = z_get_HTTP_Response(o, 500);
1882     hres = p->u.HTTP_Response;
1883     if (!strcmp(hreq->version, "1.0"))
1884     {
1885         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1886         if (v && !strcmp(v, "Keep-Alive"))
1887             keepalive = 1;
1888         else
1889             keepalive = 0;
1890         hres->version = "1.0";
1891     }
1892     else
1893     {
1894         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1895         if (v && !strcmp(v, "close"))
1896             keepalive = 0;
1897         else
1898             keepalive = 1;
1899         hres->version = "1.1";
1900     }
1901     if (!keepalive)
1902     {
1903         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1904         assoc->state = ASSOC_DEAD;
1905         assoc->cs_get_mask = 0;
1906     }
1907     else
1908     {
1909         int t;
1910         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1911
1912         if (alive && isdigit(*(const unsigned char *) alive))
1913             t = atoi(alive);
1914         else
1915             t = 15;
1916         if (t < 0 || t > 3600)
1917             t = 3600;
1918         iochan_settimeout(assoc->client_chan,t);
1919         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1920     }
1921     process_gdu_response(assoc, req, p);
1922 }
1923
1924 static void process_gdu_request(association *assoc, request *req)
1925 {
1926     if (req->gdu_request->which == Z_GDU_Z3950)
1927     {
1928         char *msg = 0;
1929         req->apdu_request = req->gdu_request->u.z3950;
1930         if (process_z_request(assoc, req, &msg) < 0)
1931             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1932     }
1933     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1934         process_http_request(assoc, req);
1935     else
1936     {
1937         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1938     }
1939 }
1940
1941 /*
1942  * Initiate request processing.
1943  */
1944 static int process_z_request(association *assoc, request *req, char **msg)
1945 {
1946     int fd = -1;
1947     Z_APDU *res;
1948     int retval;
1949
1950     *msg = "Unknown Error";
1951     assert(req && req->state == REQUEST_IDLE);
1952     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1953     {
1954         *msg = "Missing InitRequest";
1955         return -1;
1956     }
1957     switch (req->apdu_request->which)
1958     {
1959     case Z_APDU_initRequest:
1960         res = process_initRequest(assoc, req); break;
1961     case Z_APDU_searchRequest:
1962         res = process_searchRequest(assoc, req, &fd); break;
1963     case Z_APDU_presentRequest:
1964         res = process_presentRequest(assoc, req, &fd); break;
1965     case Z_APDU_scanRequest:
1966         if (assoc->init->bend_scan)
1967             res = process_scanRequest(assoc, req, &fd);
1968         else
1969         {
1970             *msg = "Cannot handle Scan APDU";
1971             return -1;
1972         }
1973         break;
1974     case Z_APDU_extendedServicesRequest:
1975         if (assoc->init->bend_esrequest)
1976             res = process_ESRequest(assoc, req, &fd);
1977         else
1978         {
1979             *msg = "Cannot handle Extended Services APDU";
1980             return -1;
1981         }
1982         break;
1983     case Z_APDU_sortRequest:
1984         if (assoc->init->bend_sort)
1985             res = process_sortRequest(assoc, req, &fd);
1986         else
1987         {
1988             *msg = "Cannot handle Sort APDU";
1989             return -1;
1990         }
1991         break;
1992     case Z_APDU_close:
1993         process_close(assoc, req);
1994         return 0;
1995     case Z_APDU_deleteResultSetRequest:
1996         if (assoc->init->bend_delete)
1997             res = process_deleteRequest(assoc, req, &fd);
1998         else
1999         {
2000             *msg = "Cannot handle Delete APDU";
2001             return -1;
2002         }
2003         break;
2004     case Z_APDU_segmentRequest:
2005         if (assoc->init->bend_segment)
2006         {
2007             res = process_segmentRequest (assoc, req);
2008         }
2009         else
2010         {
2011             *msg = "Cannot handle Segment APDU";
2012             return -1;
2013         }
2014         break;
2015     case Z_APDU_triggerResourceControlRequest:
2016         return 0;
2017     default:
2018         *msg = "Bad APDU received";
2019         return -1;
2020     }
2021     if (res)
2022     {
2023         yaz_log(YLOG_DEBUG, "  result immediately available");
2024         retval = process_z_response(assoc, req, res);
2025     }
2026     else if (fd < 0)
2027     {
2028         yaz_log(YLOG_DEBUG, "  result unavailble");
2029         retval = 0;
2030     }
2031     else /* no result yet - one will be provided later */
2032     {
2033         IOCHAN chan;
2034
2035         /* Set up an I/O handler for the fd supplied by the backend */
2036
2037         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2038         req->state = REQUEST_PENDING;
2039         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2040             abort();
2041         iochan_setdata(chan, assoc);
2042         retval = 0;
2043     }
2044     return retval;
2045 }
2046
2047 /*
2048  * Handle message from the backend.
2049  */
2050 void backend_response(IOCHAN i, int event)
2051 {
2052     association *assoc = (association *)iochan_getdata(i);
2053     request *req = request_head(&assoc->incoming);
2054     Z_APDU *res;
2055     int fd;
2056
2057     yaz_log(YLOG_DEBUG, "backend_response");
2058     assert(assoc && req && req->state != REQUEST_IDLE);
2059     /* determine what it is we're waiting for */
2060     switch (req->apdu_request->which)
2061     {
2062         case Z_APDU_searchRequest:
2063             res = response_searchRequest(assoc, req, 0, &fd); break;
2064 #if 0
2065         case Z_APDU_presentRequest:
2066             res = response_presentRequest(assoc, req, 0, &fd); break;
2067         case Z_APDU_scanRequest:
2068             res = response_scanRequest(assoc, req, 0, &fd); break;
2069 #endif
2070         default:
2071             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2072             abort();
2073     }
2074     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2075     {
2076         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2077         do_close(assoc, Z_Close_systemProblem, 0);
2078         iochan_destroy(i);
2079         return;
2080     }
2081     else if (!res) /* no result yet - try again later */
2082     {
2083         yaz_log(YLOG_DEBUG, "   no result yet");
2084         iochan_setfd(i, fd); /* in case fd has changed */
2085     }
2086 }
2087
2088 /*
2089  * Encode response, and transfer the request structure to the outgoing queue.
2090  */
2091 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2092 {
2093     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2094
2095     if (assoc->print)
2096     {
2097         if (!z_GDU(assoc->print, &res, 0, 0))
2098             yaz_log(YLOG_WARN, "ODR print error: %s",
2099                 odr_errmsg(odr_geterror(assoc->print)));
2100         odr_reset(assoc->print);
2101     }
2102     if (!z_GDU(assoc->encode, &res, 0, 0))
2103     {
2104         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2105                 odr_errmsg(odr_geterror(assoc->decode)),
2106                 odr_getelement(assoc->decode));
2107         return -1;
2108     }
2109     req->response = odr_getbuf(assoc->encode, &req->len_response,
2110         &req->size_response);
2111     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2112     odr_reset(assoc->encode);
2113     req->state = REQUEST_IDLE;
2114     request_enq(&assoc->outgoing, req);
2115     /* turn the work over to the ir_session handler */
2116     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2117     assoc->cs_put_mask = EVENT_OUTPUT;
2118     /* Is there more work to be done? give that to the input handler too */
2119 #if 1
2120     if (request_head(&assoc->incoming))
2121     {
2122         yaz_log (YLOG_DEBUG, "more work to be done");
2123         iochan_setevent(assoc->client_chan, EVENT_WORK);
2124     }
2125 #endif
2126     return 0;
2127 }
2128
2129 /*
2130  * Encode response, and transfer the request structure to the outgoing queue.
2131  */
2132 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2133 {
2134     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2135     gres->which = Z_GDU_Z3950;
2136     gres->u.z3950 = res;
2137
2138     return process_gdu_response(assoc, req, gres);
2139 }
2140
2141 static char *get_vhost(Z_OtherInformation *otherInfo)
2142 {
2143     return yaz_oi_get_string_oidval(&otherInfo, VAL_PROXY, 1, 0);
2144 }
2145
2146 /*
2147  * Handle init request.
2148  * At the moment, we don't check the options
2149  * anywhere else in the code - we just try not to do anything that would
2150  * break a naive client. We'll toss 'em into the association block when
2151  * we need them there.
2152  */
2153 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2154 {
2155     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2156     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2157     Z_InitResponse *resp = apdu->u.initResponse;
2158     bend_initresult *binitres;
2159     char *version;
2160     char options[140];
2161     statserv_options_block *cb = 0;  /* by default no control for backend */
2162
2163     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2164         cb = statserv_getcontrol();  /* got control block for backend */
2165
2166     if (cb && assoc->backend)
2167         (*cb->bend_close)(assoc->backend);
2168
2169     yaz_log(log_requestdetail, "Got initRequest");
2170     if (req->implementationId)
2171         yaz_log(log_requestdetail, "Id:        %s",
2172                 req->implementationId);
2173     if (req->implementationName)
2174         yaz_log(log_requestdetail, "Name:      %s",
2175                 req->implementationName);
2176     if (req->implementationVersion)
2177         yaz_log(log_requestdetail, "Version:   %s",
2178                 req->implementationVersion);
2179
2180     assoc_init_reset(assoc);
2181
2182     assoc->init->auth = req->idAuthentication;
2183     assoc->init->referenceId = req->referenceId;
2184
2185     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2186     {
2187         Z_CharSetandLanguageNegotiation *negotiation =
2188             yaz_get_charneg_record (req->otherInfo);
2189         if (negotiation &&
2190             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2191             assoc->init->charneg_request = negotiation;
2192     }
2193
2194     assoc->backend = 0;
2195     if (cb)
2196     {
2197         if (req->implementationVersion)
2198             yaz_log(log_requestdetail, "Config:    %s",
2199                     cb->configname);
2200
2201         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2202
2203         /* we have a backend control block, so call that init function */
2204         if (!(binitres = (*cb->bend_init)(assoc->init)))
2205         {
2206             yaz_log(YLOG_WARN, "Bad response from backend.");
2207             return 0;
2208         }
2209         assoc->backend = binitres->handle;
2210     }
2211     else
2212     {
2213         /* no backend. return error */
2214         binitres = odr_malloc(assoc->encode, sizeof(*binitres));
2215         binitres->errstring = 0;
2216         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2217         iochan_settimeout(assoc->client_chan, 10);
2218     }
2219     if ((assoc->init->bend_sort))
2220         yaz_log (YLOG_DEBUG, "Sort handler installed");
2221     if ((assoc->init->bend_search))
2222         yaz_log (YLOG_DEBUG, "Search handler installed");
2223     if ((assoc->init->bend_present))
2224         yaz_log (YLOG_DEBUG, "Present handler installed");
2225     if ((assoc->init->bend_esrequest))
2226         yaz_log (YLOG_DEBUG, "ESRequest handler installed");
2227     if ((assoc->init->bend_delete))
2228         yaz_log (YLOG_DEBUG, "Delete handler installed");
2229     if ((assoc->init->bend_scan))
2230         yaz_log (YLOG_DEBUG, "Scan handler installed");
2231     if ((assoc->init->bend_segment))
2232         yaz_log (YLOG_DEBUG, "Segment handler installed");
2233
2234     resp->referenceId = req->referenceId;
2235     *options = '\0';
2236     /* let's tell the client what we can do */
2237     if (ODR_MASK_GET(req->options, Z_Options_search))
2238     {
2239         ODR_MASK_SET(resp->options, Z_Options_search);
2240         strcat(options, "srch");
2241     }
2242     if (ODR_MASK_GET(req->options, Z_Options_present))
2243     {
2244         ODR_MASK_SET(resp->options, Z_Options_present);
2245         strcat(options, " prst");
2246     }
2247     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2248         assoc->init->bend_delete)
2249     {
2250         ODR_MASK_SET(resp->options, Z_Options_delSet);
2251         strcat(options, " del");
2252     }
2253     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2254         assoc->init->bend_esrequest)
2255     {
2256         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2257         strcat (options, " extendedServices");
2258     }
2259     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2260     {
2261         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2262         strcat(options, " namedresults");
2263     }
2264     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2265     {
2266         ODR_MASK_SET(resp->options, Z_Options_scan);
2267         strcat(options, " scan");
2268     }
2269     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2270     {
2271         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2272         strcat(options, " concurrop");
2273     }
2274     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2275     {
2276         ODR_MASK_SET(resp->options, Z_Options_sort);
2277         strcat(options, " sort");
2278     }
2279
2280     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
2281         && assoc->init->charneg_response)
2282     {
2283         Z_OtherInformation **p;
2284         Z_OtherInformationUnit *p0;
2285
2286         yaz_oi_APDU(apdu, &p);
2287
2288         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
2289             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2290
2291             p0->which = Z_OtherInfo_externallyDefinedInfo;
2292             p0->information.externallyDefinedInfo =
2293                 assoc->init->charneg_response;
2294         }
2295         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2296         strcat(options, " negotiation");
2297     }
2298
2299     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2300         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2301
2302     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2303     {
2304         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2305         assoc->version = 1; /* 1 & 2 are equivalent */
2306     }
2307     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2308     {
2309         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2310         assoc->version = 2;
2311     }
2312     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2313     {
2314         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2315         assoc->version = 3;
2316     }
2317
2318     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2319
2320     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2321         assoc->maximumRecordSize = *req->maximumRecordSize;
2322
2323     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2324         assoc->preferredMessageSize = *req->preferredMessageSize;
2325
2326     resp->preferredMessageSize = &assoc->preferredMessageSize;
2327     resp->maximumRecordSize = &assoc->maximumRecordSize;
2328
2329     resp->implementationId = odr_prepend(assoc->encode,
2330                 assoc->init->implementation_id,
2331                 resp->implementationId);
2332
2333     resp->implementationName = odr_prepend(assoc->encode,
2334                 assoc->init->implementation_name,
2335                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2336
2337     version = odr_strdup(assoc->encode, "$Revision: 1.104 $");
2338     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2339         version[strlen(version)-2] = '\0';
2340     resp->implementationVersion = odr_prepend(assoc->encode,
2341                 assoc->init->implementation_version,
2342                 odr_prepend(assoc->encode, &version[11],
2343                             resp->implementationVersion));
2344
2345     if (binitres->errcode)
2346     {
2347         assoc->state = ASSOC_DEAD;
2348         resp->userInformationField =
2349             init_diagnostics(assoc->encode, binitres->errcode,
2350                              binitres->errstring);
2351         *resp->result = 0;
2352     }
2353     if (log_request)
2354     {
2355         if (!req->idAuthentication)
2356             yaz_log(log_request, "Auth none");
2357         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2358         {
2359             const char *open = req->idAuthentication->u.open;
2360             const char *slash = strchr(open, '/');
2361             int len;
2362             if (slash)
2363                 len = slash - open;
2364             else
2365                 len = strlen(open);
2366                 yaz_log(log_request, "Auth open %.*s", len, open);
2367         }
2368         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2369         {
2370             const char *user = req->idAuthentication->u.idPass->userId;
2371             const char *group = req->idAuthentication->u.idPass->groupId;
2372             yaz_log(log_request, "Auth idPass %s %s",
2373                     user ? user : "-", group ? group : "-");
2374         }
2375         else if (req->idAuthentication->which
2376                  == Z_IdAuthentication_anonymous)
2377         {
2378             yaz_log(log_request, "Auth anonymous");
2379         }
2380         else
2381         {
2382             yaz_log(log_request, "Auth other");
2383         }
2384     }
2385     if (log_request)
2386     {
2387         WRBUF wr = wrbuf_alloc();
2388         wrbuf_printf(wr, "Init ");
2389         if (binitres->errcode)
2390             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2391         else
2392             wrbuf_printf(wr, "OK -");
2393         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2394                      (req->implementationId ? req->implementationId :"-"),
2395                      (req->implementationName ?
2396                       req->implementationName : "-"),
2397                      (req->implementationVersion ?
2398                       req->implementationVersion : "-")
2399             );
2400         yaz_log(log_request, "%s", wrbuf_buf(wr));
2401         wrbuf_free(wr, 1);
2402     }
2403     return apdu;
2404 }
2405
2406 /*
2407  * Set the specified `errcode' and `errstring' into a UserInfo-1
2408  * external to be returned to the client in accordance with Z35.90
2409  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2410  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2411  */
2412 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2413 {
2414     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2415         addinfo ? " -- " : "", addinfo ? addinfo : "");
2416     return zget_init_diagnostics(odr, error, addinfo);
2417 }
2418
2419 /*
2420  * nonsurrogate diagnostic record.
2421  */
2422 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2423 {
2424     Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec));
2425
2426     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2427             addinfo ? " -- " : "", addinfo ? addinfo : "");
2428
2429     rec->which = Z_Records_NSD;
2430     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2431                                                            error, addinfo);
2432     return rec;
2433 }
2434
2435 /*
2436  * surrogate diagnostic.
2437  */
2438 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2439                                           const char *dbname,
2440                                           int error, const char *addinfo)
2441 {
2442     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2443             addinfo ? " -- " : "", addinfo ? addinfo : "");
2444     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2445 }
2446
2447 static Z_Records *pack_records(association *a, char *setname, int start,
2448                                int *num, Z_RecordComposition *comp,
2449                                int *next, int *pres, oid_value format,
2450                                Z_ReferenceId *referenceId,
2451                                int *oid, int *errcode)
2452 {
2453     int recno, total_length = 0, toget = *num, dumped_records = 0;
2454     Z_Records *records =
2455         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
2456     Z_NamePlusRecordList *reclist =
2457         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
2458     Z_NamePlusRecord **list =
2459         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
2460
2461     records->which = Z_Records_DBOSD;
2462     records->u.databaseOrSurDiagnostics = reclist;
2463     reclist->num_records = 0;
2464     reclist->records = list;
2465     *pres = Z_PresentStatus_success;
2466     *num = 0;
2467     *next = 0;
2468
2469     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2470     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2471         a->maximumRecordSize);
2472     for (recno = start; reclist->num_records < toget; recno++)
2473     {
2474         bend_fetch_rr freq;
2475         Z_NamePlusRecord *thisrec;
2476         int this_length = 0;
2477         /*
2478          * we get the number of bytes allocated on the stream before any
2479          * allocation done by the backend - this should give us a reasonable
2480          * idea of the total size of the data so far.
2481          */
2482         total_length = odr_total(a->encode) - dumped_records;
2483         freq.errcode = 0;
2484         freq.errstring = 0;
2485         freq.basename = 0;
2486         freq.len = 0;
2487         freq.record = 0;
2488         freq.last_in_set = 0;
2489         freq.setname = setname;
2490         freq.surrogate_flag = 0;
2491         freq.number = recno;
2492         freq.comp = comp;
2493         freq.request_format = format;
2494         freq.request_format_raw = oid;
2495         freq.output_format = format;
2496         freq.output_format_raw = 0;
2497         freq.stream = a->encode;
2498         freq.print = a->print;
2499         freq.referenceId = referenceId;
2500         freq.schema = 0;
2501
2502         retrieve_fetch(a, &freq);
2503
2504         *next = freq.last_in_set ? 0 : recno + 1;
2505
2506         /* backend should be able to signal whether error is system-wide
2507            or only pertaining to current record */
2508         if (freq.errcode)
2509         {
2510             if (!freq.surrogate_flag)
2511             {
2512                 char s[20];
2513                 *pres = Z_PresentStatus_failure;
2514                 /* for 'present request out of range',
2515                    set addinfo to record position if not set */
2516                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2517                                 freq.errstring == 0)
2518                 {
2519                     sprintf (s, "%d", recno);
2520                     freq.errstring = s;
2521                 }
2522                 if (errcode)
2523                     *errcode = freq.errcode;
2524                 return diagrec(a, freq.errcode, freq.errstring);
2525             }
2526             reclist->records[reclist->num_records] =
2527                 surrogatediagrec(a, freq.basename, freq.errcode,
2528                                  freq.errstring);
2529             reclist->num_records++;
2530             continue;
2531         }
2532         if (freq.record == 0)  /* no error and no record ? */
2533         {
2534             *next = 0;   /* signal end-of-set and stop */
2535             break;
2536         }
2537         if (freq.len >= 0)
2538             this_length = freq.len;
2539         else
2540             this_length = odr_total(a->encode) - total_length - dumped_records;
2541         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2542             this_length, total_length, dumped_records);
2543         if (a->preferredMessageSize > 0 &&
2544                 this_length + total_length > a->preferredMessageSize)
2545         {
2546             /* record is small enough, really */
2547             if (this_length <= a->preferredMessageSize && recno > start)
2548             {
2549                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2550                 *pres = Z_PresentStatus_partial_2;
2551                 break;
2552             }
2553             /* record can only be fetched by itself */
2554             if (this_length < a->maximumRecordSize)
2555             {
2556                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2557                 if (toget > 1)
2558                 {
2559                     yaz_log(YLOG_DEBUG, "  Dropped it");
2560                     reclist->records[reclist->num_records] =
2561                          surrogatediagrec(a, freq.basename, 16, 0);
2562                     reclist->num_records++;
2563                     dumped_records += this_length;
2564                     continue;
2565                 }
2566             }
2567             else /* too big entirely */
2568             {
2569                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2570                         this_length, a->maximumRecordSize);
2571                 reclist->records[reclist->num_records] =
2572                     surrogatediagrec(a, freq.basename, 17, 0);
2573                 reclist->num_records++;
2574                 dumped_records += this_length;
2575                 continue;
2576             }
2577         }
2578
2579         if (!(thisrec = (Z_NamePlusRecord *)
2580               odr_malloc(a->encode, sizeof(*thisrec))))
2581             return 0;
2582         if (freq.basename)
2583             thisrec->databaseName = odr_strdup(a->encode, freq.basename);
2584         else
2585             thisrec->databaseName = 0;
2586         thisrec->which = Z_NamePlusRecord_databaseRecord;
2587
2588         if (freq.output_format_raw)
2589         {
2590             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
2591             freq.output_format = ident->value;
2592         }
2593         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
2594                                                  freq.record, freq.len);
2595         if (!thisrec->u.databaseRecord)
2596             return 0;
2597         reclist->records[reclist->num_records] = thisrec;
2598         reclist->num_records++;
2599     }
2600     *num = reclist->num_records;
2601     return records;
2602 }
2603
2604 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2605     int *fd)
2606 {
2607     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2608     bend_search_rr *bsrr =
2609         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
2610
2611     yaz_log(log_requestdetail, "Got SearchRequest.");
2612     bsrr->fd = fd;
2613     bsrr->request = reqb;
2614     bsrr->association = assoc;
2615     bsrr->referenceId = req->referenceId;
2616     save_referenceId (reqb, bsrr->referenceId);
2617     bsrr->srw_sortKeys = 0;
2618     bsrr->srw_setname = 0;
2619     bsrr->srw_setnameIdleTime = 0;
2620
2621     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2622     if (req->databaseNames)
2623     {
2624         int i;
2625         for (i = 0; i < req->num_databaseNames; i++)
2626             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2627     }
2628
2629     yaz_log_zquery_level(log_requestdetail,req->query);
2630
2631     if (assoc->init->bend_search)
2632     {
2633         bsrr->setname = req->resultSetName;
2634         bsrr->replace_set = *req->replaceIndicator;
2635         bsrr->num_bases = req->num_databaseNames;
2636         bsrr->basenames = req->databaseNames;
2637         bsrr->query = req->query;
2638         bsrr->stream = assoc->encode;
2639         nmem_transfer(bsrr->stream->mem, reqb->request_mem);
2640         bsrr->decode = assoc->decode;
2641         bsrr->print = assoc->print;
2642         bsrr->hits = 0;
2643         bsrr->errcode = 0;
2644         bsrr->errstring = NULL;
2645         bsrr->search_info = NULL;
2646
2647         if (assoc->server && assoc->server->cql_transform
2648             && req->query->which == Z_Query_type_104
2649             && req->query->u.type_104->which == Z_External_CQL)
2650         {
2651             /* have a CQL query and a CQL to PQF transform .. */
2652             int srw_errcode =
2653                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2654                         assoc->server->cql_transform, bsrr->query);
2655             if (srw_errcode)
2656                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2657         }
2658         if (!bsrr->errcode)
2659             (assoc->init->bend_search)(assoc->backend, bsrr);
2660         if (!bsrr->request)  /* backend not ready with the search response */
2661             return 0;  /* should not be used any more */
2662     }
2663     else
2664     {
2665         /* FIXME - make a diagnostic for it */
2666         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2667     }
2668     return response_searchRequest(assoc, reqb, bsrr, fd);
2669 }
2670
2671 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2672
2673 /*
2674  * Prepare a searchresponse based on the backend results. We probably want
2675  * to look at making the fetching of records nonblocking as well, but
2676  * so far, we'll keep things simple.
2677  * If bsrt is null, that means we're called in response to a communications
2678  * event, and we'll have to get the response for ourselves.
2679  */
2680 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2681     bend_search_rr *bsrt, int *fd)
2682 {
2683     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2684     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2685     Z_SearchResponse *resp = (Z_SearchResponse *)
2686         odr_malloc (assoc->encode, sizeof(*resp));
2687     int *nulint = odr_intdup (assoc->encode, 0);
2688     bool_t *sr = odr_intdup(assoc->encode, 1);
2689     int *next = odr_intdup(assoc->encode, 0);
2690     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2691     int returnedrecs=0;
2692
2693     apdu->which = Z_APDU_searchResponse;
2694     apdu->u.searchResponse = resp;
2695     resp->referenceId = req->referenceId;
2696     resp->additionalSearchInfo = 0;
2697     resp->otherInfo = 0;
2698     *fd = -1;
2699     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2700     {
2701         yaz_log(YLOG_FATAL, "Bad result from backend");
2702         return 0;
2703     }
2704     else if (bsrt->errcode)
2705     {
2706         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2707         resp->resultCount = nulint;
2708         resp->numberOfRecordsReturned = nulint;
2709         resp->nextResultSetPosition = nulint;
2710         resp->searchStatus = nulint;
2711         resp->resultSetStatus = none;
2712         resp->presentStatus = 0;
2713     }
2714     else
2715     {
2716         int *toget = odr_intdup(assoc->encode, 0);
2717         int *presst = odr_intdup(assoc->encode, 0);
2718         Z_RecordComposition comp, *compp = 0;
2719
2720         yaz_log (log_requestdetail, "resultCount: %d", bsrt->hits);
2721
2722         resp->records = 0;
2723         resp->resultCount = &bsrt->hits;
2724
2725         comp.which = Z_RecordComp_simple;
2726         /* how many records does the user agent want, then? */
2727         if (bsrt->hits <= *req->smallSetUpperBound)
2728         {
2729             *toget = bsrt->hits;
2730             if ((comp.u.simple = req->smallSetElementSetNames))
2731                 compp = &comp;
2732         }
2733         else if (bsrt->hits < *req->largeSetLowerBound)
2734         {
2735             *toget = *req->mediumSetPresentNumber;
2736             if (*toget > bsrt->hits)
2737                 *toget = bsrt->hits;
2738             if ((comp.u.simple = req->mediumSetElementSetNames))
2739                 compp = &comp;
2740         }
2741         else
2742             *toget = 0;
2743
2744         if (*toget && !resp->records)
2745         {
2746             oident *prefformat;
2747             oid_value form;
2748
2749             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2750                 form = VAL_NONE;
2751             else
2752                 form = prefformat->value;
2753
2754             /* Call bend_present if defined */
2755             if (assoc->init->bend_present)
2756             {
2757                 bend_present_rr *bprr = (bend_present_rr *)
2758                     nmem_malloc (reqb->request_mem, sizeof(*bprr));
2759                 bprr->setname = req->resultSetName;
2760                 bprr->start = 1;
2761                 bprr->number = *toget;
2762                 bprr->format = form;
2763                 bprr->comp = compp;
2764                 bprr->referenceId = req->referenceId;
2765                 bprr->stream = assoc->encode;
2766                 bprr->print = assoc->print;
2767                 bprr->request = reqb;
2768                 bprr->association = assoc;
2769                 bprr->errcode = 0;
2770                 bprr->errstring = NULL;
2771                 (*assoc->init->bend_present)(assoc->backend, bprr);
2772
2773                 if (!bprr->request)
2774                     return 0;
2775                 if (bprr->errcode)
2776                 {
2777                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2778                     *resp->presentStatus = Z_PresentStatus_failure;
2779                 }
2780             }
2781
2782             if (!resp->records)
2783                 resp->records = pack_records(assoc, req->resultSetName, 1,
2784                                              toget, compp, next, presst, form, req->referenceId,
2785                                              req->preferredRecordSyntax, NULL);
2786             if (!resp->records)
2787                 return 0;
2788             resp->numberOfRecordsReturned = toget;
2789             returnedrecs = *toget;
2790             resp->nextResultSetPosition = next;
2791             resp->searchStatus = sr;
2792             resp->resultSetStatus = 0;
2793             resp->presentStatus = presst;
2794         }
2795         else
2796         {
2797             if (*resp->resultCount)
2798                 *next = 1;
2799             resp->numberOfRecordsReturned = nulint;
2800             resp->nextResultSetPosition = next;
2801             resp->searchStatus = sr;
2802             resp->resultSetStatus = 0;
2803             resp->presentStatus = 0;
2804         }
2805     }
2806     resp->additionalSearchInfo = bsrt->search_info;
2807
2808     if (log_request)
2809     {
2810         int i;
2811         WRBUF wr = wrbuf_alloc();
2812
2813         for (i = 0 ; i < req->num_databaseNames; i++){
2814             if (i)
2815                 wrbuf_printf(wr, "+");
2816             wrbuf_printf(wr, req->databaseNames[i]);
2817         }
2818         wrbuf_printf(wr, " ");
2819
2820         if (bsrt->errcode)
2821             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2822         else
2823             wrbuf_printf(wr, "OK %d", bsrt->hits);
2824         wrbuf_printf(wr, " %s 1+%d ",
2825                      req->resultSetName, returnedrecs);
2826         yaz_query_to_wrbuf(wr, req->query);
2827
2828         yaz_log(log_request, "Search %s", wrbuf_buf(wr));
2829         wrbuf_free(wr, 1);
2830     }
2831     return apdu;
2832 }
2833
2834 /*
2835  * Maybe we got a little over-friendly when we designed bend_fetch to
2836  * get only one record at a time. Some backends can optimise multiple-record
2837  * fetches, and at any rate, there is some overhead involved in
2838  * all that selecting and hopping around. Problem is, of course, that the
2839  * frontend can't know ahead of time how many records it'll need to
2840  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2841  * is downright lousy as a bulk data transfer protocol.
2842  *
2843  * To start with, we'll do the fetching of records from the backend
2844  * in one operation: To save some trips in and out of the event-handler,
2845  * and to simplify the interface to pack_records. At any rate, asynch
2846  * operation is more fun in operations that have an unpredictable execution
2847  * speed - which is normally more true for search than for present.
2848  */
2849 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2850                                       int *fd)
2851 {
2852     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2853     oident *prefformat;
2854     oid_value form;
2855     Z_APDU *apdu;
2856     Z_PresentResponse *resp;
2857     int *next;
2858     int *num;
2859     int errcode = 0;
2860     const char *errstring = 0;
2861
2862     yaz_log(log_requestdetail, "Got PresentRequest.");
2863
2864     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2865         form = VAL_NONE;
2866     else
2867         form = prefformat->value;
2868     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2869     resp->records = 0;
2870     resp->presentStatus = odr_intdup(assoc->encode, 0);
2871     if (assoc->init->bend_present)
2872     {
2873         bend_present_rr *bprr = (bend_present_rr *)
2874             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2875         bprr->setname = req->resultSetId;
2876         bprr->start = *req->resultSetStartPoint;
2877         bprr->number = *req->numberOfRecordsRequested;
2878         bprr->format = form;
2879         bprr->comp = req->recordComposition;
2880         bprr->referenceId = req->referenceId;
2881         bprr->stream = assoc->encode;
2882         bprr->print = assoc->print;
2883         bprr->request = reqb;
2884         bprr->association = assoc;
2885         bprr->errcode = 0;
2886         bprr->errstring = NULL;
2887         (*assoc->init->bend_present)(assoc->backend, bprr);
2888
2889         if (!bprr->request)
2890             return 0; /* should not happen */
2891         if (bprr->errcode)
2892         {
2893             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2894             *resp->presentStatus = Z_PresentStatus_failure;
2895             errcode = bprr->errcode;
2896             errstring = bprr->errstring;
2897         }
2898     }
2899     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2900     next = odr_intdup(assoc->encode, 0);
2901     num = odr_intdup(assoc->encode, 0);
2902
2903     apdu->which = Z_APDU_presentResponse;
2904     apdu->u.presentResponse = resp;
2905     resp->referenceId = req->referenceId;
2906     resp->otherInfo = 0;
2907
2908     if (!resp->records)
2909     {
2910         *num = *req->numberOfRecordsRequested;
2911         resp->records =
2912             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2913                          num, req->recordComposition, next,
2914                          resp->presentStatus,
2915                          form, req->referenceId, req->preferredRecordSyntax,
2916                          &errcode);
2917     }
2918     if (log_request)
2919     {
2920         WRBUF wr = wrbuf_alloc();
2921         wrbuf_printf(wr, "Present ");
2922
2923         if (*resp->presentStatus == Z_PresentStatus_failure)
2924             wrbuf_printf(wr, "ERROR %d ", errcode);
2925         else if (*resp->presentStatus == Z_PresentStatus_success)
2926             wrbuf_printf(wr, "OK -  ");
2927         else
2928             wrbuf_printf(wr, "Partial %d - ", *resp->presentStatus);
2929
2930         wrbuf_printf(wr, " %s %d+%d ",
2931                 req->resultSetId, *req->resultSetStartPoint,
2932                 *req->numberOfRecordsRequested);
2933         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2934         wrbuf_free(wr, 1);
2935     }
2936     if (!resp->records)
2937         return 0;
2938     resp->numberOfRecordsReturned = num;
2939     resp->nextResultSetPosition = next;
2940
2941     return apdu;
2942 }
2943
2944 /*
2945  * Scan was implemented rather in a hurry, and with support for only the basic
2946  * elements of the service in the backend API. Suggestions are welcome.
2947  */
2948 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2949 {
2950     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2951     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2952     Z_ScanResponse *res = (Z_ScanResponse *)
2953         odr_malloc (assoc->encode, sizeof(*res));
2954     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2955     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2956     Z_ListEntries *ents = (Z_ListEntries *)
2957         odr_malloc (assoc->encode, sizeof(*ents));
2958     Z_DiagRecs *diagrecs_p = NULL;
2959     oident *attset;
2960     bend_scan_rr *bsrr = (bend_scan_rr *)
2961         odr_malloc (assoc->encode, sizeof(*bsrr));
2962     struct scan_entry *save_entries;
2963
2964     yaz_log(log_requestdetail, "Got ScanRequest");
2965
2966     apdu->which = Z_APDU_scanResponse;
2967     apdu->u.scanResponse = res;
2968     res->referenceId = req->referenceId;
2969
2970     /* if step is absent, set it to 0 */
2971     res->stepSize = odr_intdup(assoc->encode, 0);
2972     if (req->stepSize)
2973         *res->stepSize = *req->stepSize;
2974
2975     res->scanStatus = scanStatus;
2976     res->numberOfEntriesReturned = numberOfEntriesReturned;
2977     res->positionOfTerm = 0;
2978     res->entries = ents;
2979     ents->num_entries = 0;
2980     ents->entries = NULL;
2981     ents->num_nonsurrogateDiagnostics = 0;
2982     ents->nonsurrogateDiagnostics = NULL;
2983     res->attributeSet = 0;
2984     res->otherInfo = 0;
2985
2986     if (req->databaseNames)
2987     {
2988         int i;
2989         for (i = 0; i < req->num_databaseNames; i++)
2990             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2991     }
2992     bsrr->scanClause = 0;
2993     bsrr->errcode = 0;
2994     bsrr->errstring = 0;
2995     bsrr->num_bases = req->num_databaseNames;
2996     bsrr->basenames = req->databaseNames;
2997     bsrr->num_entries = *req->numberOfTermsRequested;
2998     bsrr->term = req->termListAndStartPoint;
2999     bsrr->referenceId = req->referenceId;
3000     bsrr->stream = assoc->encode;
3001     bsrr->print = assoc->print;
3002     bsrr->step_size = res->stepSize;
3003     bsrr->entries = 0;
3004     /* For YAZ 2.0 and earlier it was the backend handler that
3005        initialized entries (member display_term did not exist)
3006        YAZ 2.0 and later sets 'entries'  and initialize all members
3007        including 'display_term'. If YAZ 2.0 or later sees that
3008        entries was modified - we assume that it is an old handler and
3009        that 'display_term' is _not_ set.
3010     */
3011     if (bsrr->num_entries > 0)
3012     {
3013         int i;
3014         bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3015                                    bsrr->num_entries);
3016         for (i = 0; i<bsrr->num_entries; i++)
3017         {
3018             bsrr->entries[i].term = 0;
3019             bsrr->entries[i].occurrences = 0;
3020             bsrr->entries[i].errcode = 0;
3021             bsrr->entries[i].errstring = 0;
3022             bsrr->entries[i].display_term = 0;
3023         }
3024     }
3025     save_entries = bsrr->entries;  /* save it so we can compare later */
3026
3027     if (req->attributeSet &&
3028         (attset = oid_getentbyoid(req->attributeSet)) &&
3029         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
3030         bsrr->attributeset = attset->value;
3031     else
3032         bsrr->attributeset = VAL_NONE;
3033     log_scan_term_level (log_requestdetail, req->termListAndStartPoint,
3034             bsrr->attributeset);
3035     bsrr->term_position = req->preferredPositionInResponse ?
3036         *req->preferredPositionInResponse : 1;
3037
3038     ((int (*)(void *, bend_scan_rr *))
3039      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3040
3041     if (bsrr->errcode)
3042         diagrecs_p = zget_DiagRecs(assoc->encode,
3043                                    bsrr->errcode, bsrr->errstring);
3044     else
3045     {
3046         int i;
3047         Z_Entry **tab = (Z_Entry **)
3048             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
3049
3050         if (bsrr->status == BEND_SCAN_PARTIAL)
3051             *scanStatus = Z_Scan_partial_5;
3052         else
3053             *scanStatus = Z_Scan_success;
3054         ents->entries = tab;
3055         ents->num_entries = bsrr->num_entries;
3056         res->numberOfEntriesReturned = &ents->num_entries;
3057         res->positionOfTerm = &bsrr->term_position;
3058         for (i = 0; i < bsrr->num_entries; i++)
3059         {
3060             Z_Entry *e;
3061             Z_TermInfo *t;
3062             Odr_oct *o;
3063
3064             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3065             if (bsrr->entries[i].occurrences >= 0)
3066             {
3067                 e->which = Z_Entry_termInfo;
3068                 e->u.termInfo = t = (Z_TermInfo *)
3069                     odr_malloc(assoc->encode, sizeof(*t));
3070                 t->suggestedAttributes = 0;
3071                 t->displayTerm = 0;
3072                 if (save_entries == bsrr->entries &&
3073                     bsrr->entries[i].display_term)
3074                 {
3075                     /* the entries was _not_ set by the handler. So it's
3076                        safe to test for new member display_term. It is
3077                        NULL'ed by us.
3078                     */
3079                     t->displayTerm = odr_strdup(assoc->encode,
3080                                                 bsrr->entries[i].display_term);
3081                 }
3082                 t->alternativeTerm = 0;
3083                 t->byAttributes = 0;
3084                 t->otherTermInfo = 0;
3085                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3086                 t->term = (Z_Term *)
3087                     odr_malloc(assoc->encode, sizeof(*t->term));
3088                 t->term->which = Z_Term_general;
3089                 t->term->u.general = o =
3090                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3091                 o->buf = (unsigned char *)
3092                     odr_malloc(assoc->encode, o->len = o->size =
3093                                strlen(bsrr->entries[i].term));
3094                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3095                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3096                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3097             }
3098             else
3099             {
3100                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3101                                                   bsrr->entries[i].errcode,
3102                                                   bsrr->entries[i].errstring);
3103                 assert (drecs->num_diagRecs == 1);
3104                 e->which = Z_Entry_surrogateDiagnostic;
3105                 assert (drecs->diagRecs[0]);
3106                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3107             }
3108         }
3109     }
3110     if (diagrecs_p)
3111     {
3112         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3113         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3114     }
3115     if (log_request)
3116     {
3117         int i;
3118         WRBUF wr = wrbuf_alloc();
3119         wrbuf_printf(wr, "Scan ");
3120         for (i = 0 ; i < req->num_databaseNames; i++){
3121             if (i)
3122                 wrbuf_printf(wr, "+");
3123             wrbuf_printf(wr, req->databaseNames[i]);
3124         }
3125         wrbuf_printf(wr, " ");
3126
3127         if (bsrr->errcode){
3128             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3129             wrbuf_printf(wr, " ");
3130         }
3131         else
3132             wrbuf_printf(wr, "OK ");
3133         /* else if (*res->scanStatus == Z_Scan_success) */
3134         /*    wrbuf_printf(wr, "OK "); */
3135         /* else */
3136         /* wrbuf_printf(wr, "Partial "); */
3137
3138         if (*res->numberOfEntriesReturned)
3139             wrbuf_printf(wr, "%d - ", *res->numberOfEntriesReturned);
3140         else
3141             wrbuf_printf(wr, "0 - ");
3142
3143         wrbuf_printf(wr, "%d+%d+%d ",
3144                      (req->preferredPositionInResponse ?
3145                       *req->preferredPositionInResponse : 1),
3146                      *req->numberOfTermsRequested,
3147                      (res->stepSize ? *res->stepSize : 1));
3148
3149         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3150                           bsrr->attributeset);
3151         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3152         wrbuf_free(wr, 1);
3153     }
3154     return apdu;
3155 }
3156
3157 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3158     int *fd)
3159 {
3160     int i;
3161     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3162     Z_SortResponse *res = (Z_SortResponse *)
3163         odr_malloc (assoc->encode, sizeof(*res));
3164     bend_sort_rr *bsrr = (bend_sort_rr *)
3165         odr_malloc (assoc->encode, sizeof(*bsrr));
3166
3167     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3168
3169     yaz_log(log_requestdetail, "Got SortRequest.");
3170
3171     bsrr->num_input_setnames = req->num_inputResultSetNames;
3172     for (i=0;i<req->num_inputResultSetNames;i++)
3173         yaz_log(log_requestdetail, "Input resultset: '%s'",
3174                 req->inputResultSetNames[i]);
3175     bsrr->input_setnames = req->inputResultSetNames;
3176     bsrr->referenceId = req->referenceId;
3177     bsrr->output_setname = req->sortedResultSetName;
3178     yaz_log(log_requestdetail, "Output resultset: '%s'",
3179                 req->sortedResultSetName);
3180     bsrr->sort_sequence = req->sortSequence;
3181        /*FIXME - dump those sequences too */
3182     bsrr->stream = assoc->encode;
3183     bsrr->print = assoc->print;
3184
3185     bsrr->sort_status = Z_SortResponse_failure;
3186     bsrr->errcode = 0;
3187     bsrr->errstring = 0;
3188
3189     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3190
3191     res->referenceId = bsrr->referenceId;
3192     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3193     res->resultSetStatus = 0;
3194     if (bsrr->errcode)
3195     {
3196         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3197                                        bsrr->errcode, bsrr->errstring);
3198         res->diagnostics = dr->diagRecs;
3199         res->num_diagnostics = dr->num_diagRecs;
3200     }
3201     else
3202     {
3203         res->num_diagnostics = 0;
3204         res->diagnostics = 0;
3205     }
3206     res->resultCount = 0;
3207     res->otherInfo = 0;
3208
3209     apdu->which = Z_APDU_sortResponse;
3210     apdu->u.sortResponse = res;
3211     if (log_request)
3212     {
3213         WRBUF wr = wrbuf_alloc();
3214         wrbuf_printf(wr, "Sort ");
3215         if (bsrr->errcode)
3216             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3217         else
3218             wrbuf_printf(wr,  "OK -");
3219         wrbuf_printf(wr, " (");
3220         for (i = 0; i<req->num_inputResultSetNames; i++)
3221         {
3222             if (i)
3223                 wrbuf_printf(wr, "+");
3224             wrbuf_printf(wr, req->inputResultSetNames[i]);
3225         }
3226         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3227
3228         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3229         wrbuf_free(wr, 1);
3230     }
3231     return apdu;
3232 }
3233
3234 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3235     int *fd)
3236 {
3237     int i;
3238     Z_DeleteResultSetRequest *req =
3239         reqb->apdu_request->u.deleteResultSetRequest;
3240     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3241         odr_malloc (assoc->encode, sizeof(*res));
3242     bend_delete_rr *bdrr = (bend_delete_rr *)
3243         odr_malloc (assoc->encode, sizeof(*bdrr));
3244     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3245
3246     yaz_log(log_requestdetail, "Got DeleteRequest.");
3247
3248     bdrr->num_setnames = req->num_resultSetList;
3249     bdrr->setnames = req->resultSetList;
3250     for (i = 0; i<req->num_resultSetList; i++)
3251         yaz_log(log_requestdetail, "resultset: '%s'",
3252                 req->resultSetList[i]);
3253     bdrr->stream = assoc->encode;
3254     bdrr->print = assoc->print;
3255     bdrr->function = *req->deleteFunction;
3256     bdrr->referenceId = req->referenceId;
3257     bdrr->statuses = 0;
3258     if (bdrr->num_setnames > 0)
3259     {
3260         bdrr->statuses = (int*)
3261             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3262                        bdrr->num_setnames);
3263         for (i = 0; i < bdrr->num_setnames; i++)
3264             bdrr->statuses[i] = 0;
3265     }
3266     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3267
3268     res->referenceId = req->referenceId;
3269
3270     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3271
3272     res->deleteListStatuses = 0;
3273     if (bdrr->num_setnames > 0)
3274     {
3275         int i;
3276         res->deleteListStatuses = (Z_ListStatuses *)
3277             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3278         res->deleteListStatuses->num = bdrr->num_setnames;
3279         res->deleteListStatuses->elements =
3280             (Z_ListStatus **)
3281             odr_malloc (assoc->encode,
3282                         sizeof(*res->deleteListStatuses->elements) *
3283                         bdrr->num_setnames);
3284         for (i = 0; i<bdrr->num_setnames; i++)
3285         {
3286             res->deleteListStatuses->elements[i] =
3287                 (Z_ListStatus *)
3288                 odr_malloc (assoc->encode,
3289                             sizeof(**res->deleteListStatuses->elements));
3290             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3291             res->deleteListStatuses->elements[i]->id =
3292                 odr_strdup (assoc->encode, bdrr->setnames[i]);
3293         }
3294     }
3295     res->numberNotDeleted = 0;
3296     res->bulkStatuses = 0;
3297     res->deleteMessage = 0;
3298     res->otherInfo = 0;
3299
3300     apdu->which = Z_APDU_deleteResultSetResponse;
3301     apdu->u.deleteResultSetResponse = res;
3302     if (log_request)
3303     {
3304         WRBUF wr = wrbuf_alloc();
3305         wrbuf_printf(wr, "Delete ");
3306         if (bdrr->delete_status)
3307             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3308         else
3309             wrbuf_printf(wr, "OK -");
3310         for (i = 0; i<req->num_resultSetList; i++)
3311             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3312         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3313         wrbuf_free(wr, 1);
3314     }
3315     return apdu;
3316 }
3317
3318 static void process_close(association *assoc, request *reqb)
3319 {
3320     Z_Close *req = reqb->apdu_request->u.close;
3321     static char *reasons[] =
3322     {
3323         "finished",
3324         "shutdown",
3325         "systemProblem",
3326         "costLimit",
3327         "resources",
3328         "securityViolation",
3329         "protocolError",
3330         "lackOfActivity",
3331         "peerAbort",
3332         "unspecified"
3333     };
3334
3335     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3336         reasons[*req->closeReason], req->diagnosticInformation ?
3337         req->diagnosticInformation : "NULL");
3338     if (assoc->version < 3) /* to make do_force respond with close */
3339         assoc->version = 3;
3340     do_close_req(assoc, Z_Close_finished,
3341                  "Association terminated by client", reqb);
3342     yaz_log(log_request,"Close OK");
3343 }
3344
3345 void save_referenceId (request *reqb, Z_ReferenceId *refid)
3346 {
3347     if (refid)
3348     {
3349         reqb->len_refid = refid->len;
3350         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
3351         memcpy (reqb->refid, refid->buf, refid->len);
3352     }
3353     else
3354     {
3355         reqb->len_refid = 0;
3356         reqb->refid = NULL;
3357     }
3358 }
3359
3360 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
3361 {
3362     process_z_response (a, req, res);
3363 }
3364
3365 bend_request bend_request_mk (bend_association a)
3366 {
3367     request *nreq = request_get (&a->outgoing);
3368     nreq->request_mem = nmem_create ();
3369     return nreq;
3370 }
3371
3372 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
3373 {
3374     Z_ReferenceId *id;
3375     if (!req->refid)
3376         return 0;
3377     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
3378     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
3379     id->len = id->size = req->len_refid;
3380     memcpy (id->buf, req->refid, req->len_refid);
3381     return id;
3382 }
3383
3384 void bend_request_destroy (bend_request *req)
3385 {
3386     nmem_destroy((*req)->request_mem);
3387     request_release(*req);
3388     *req = NULL;
3389 }
3390
3391 int bend_backend_respond (bend_association a, bend_request req)
3392 {
3393     char *msg;
3394     int r;
3395     r = process_z_request (a, req, &msg);
3396     if (r < 0)
3397         yaz_log (YLOG_WARN, "%s", msg);
3398     return r;
3399 }
3400
3401 void bend_request_setdata(bend_request r, void *p)
3402 {
3403     r->clientData = p;
3404 }
3405
3406 void *bend_request_getdata(bend_request r)
3407 {
3408     return r->clientData;
3409 }
3410
3411 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
3412 {
3413     bend_segment_rr req;
3414
3415     req.segment = reqb->apdu_request->u.segmentRequest;
3416     req.stream = assoc->encode;
3417     req.decode = assoc->decode;
3418     req.print = assoc->print;
3419     req.association = assoc;
3420
3421     (*assoc->init->bend_segment)(assoc->backend, &req);
3422
3423     return 0;
3424 }
3425
3426 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3427 {
3428     bend_esrequest_rr esrequest;
3429     const char *ext_name = "unknown";
3430
3431     Z_ExtendedServicesRequest *req =
3432         reqb->apdu_request->u.extendedServicesRequest;
3433     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3434
3435     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3436
3437     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3438     esrequest.stream = assoc->encode;
3439     esrequest.decode = assoc->decode;
3440     esrequest.print = assoc->print;
3441     esrequest.errcode = 0;
3442     esrequest.errstring = NULL;
3443     esrequest.request = reqb;
3444     esrequest.association = assoc;
3445     esrequest.taskPackage = 0;
3446     esrequest.referenceId = req->referenceId;
3447
3448
3449     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3450     {
3451         switch(esrequest.esr->taskSpecificParameters->which)
3452         {
3453         case Z_External_itemOrder:
3454             ext_name = "ItemOrder"; break;
3455         case Z_External_update:
3456             ext_name = "Update"; break;
3457         case Z_External_update0:
3458             ext_name = "Update0"; break;
3459         case Z_External_ESAdmin:
3460             ext_name = "Admin"; break;
3461
3462         }
3463     }
3464
3465     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3466
3467     /* If the response is being delayed, return NULL */
3468     if (esrequest.request == NULL)
3469         return(NULL);
3470
3471     resp->referenceId = req->referenceId;
3472
3473     if (esrequest.errcode == -1)
3474     {
3475         /* Backend service indicates request will be processed */
3476         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3477         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3478     }
3479     else if (esrequest.errcode == 0)
3480     {
3481         /* Backend service indicates request will be processed */
3482         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3483         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3484     }
3485     else
3486     {
3487         Z_DiagRecs *diagRecs =
3488             zget_DiagRecs(assoc->encode, esrequest.errcode,
3489                           esrequest.errstring);
3490         /* Backend indicates error, request will not be processed */
3491         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3492         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3493         resp->num_diagnostics = diagRecs->num_diagRecs;
3494         resp->diagnostics = diagRecs->diagRecs;
3495         if (log_request)
3496         {
3497             WRBUF wr = wrbuf_alloc();
3498             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3499             yaz_log(log_request, "EsRequest %s", wrbuf_buf(wr) );
3500             wrbuf_free(wr, 1);
3501         }
3502
3503     }
3504     /* Do something with the members of bend_extendedservice */
3505     if (esrequest.taskPackage)
3506         resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED,
3507                                          (const char *)  esrequest.taskPackage,
3508                                           -1);
3509     yaz_log(YLOG_DEBUG,"Send the result apdu");
3510     return apdu;
3511 }
3512
3513 /*
3514  * Local variables:
3515  * c-basic-offset: 4
3516  * indent-tabs-mode: nil
3517  * End:
3518  * vim: shiftwidth=4 tabstop=8 expandtab
3519  */
3520