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 1.100 2006-10-05 15:24:02 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 const char *get_esn(Z_RecordComposition *comp)
 569 {
 570     if (comp && comp->which == Z_RecordComp_complex)
 571     {
 572         if (comp->u.complex->generic
 573             && comp->u.complex->generic->elementSpec
 574             && (comp->u.complex->generic->elementSpec->which ==
 575                 Z_ElementSpec_elementSetName))
 576             return comp->u.complex->generic->elementSpec->u.elementSetName;
 577     }
 578     else if (comp && comp->which == Z_RecordComp_simple &&
 579              comp->u.simple->which == Z_ElementSetNames_generic)
 580         return comp->u.simple->u.generic;
 581     return 0;
 582 }
 583
 584 static void set_esn(Z_RecordComposition **comp_p, const char *esn, NMEM nmem)
 585 {
 586     Z_RecordComposition *comp = nmem_malloc(nmem, sizeof(*comp));
 587
 588     comp->which = Z_RecordComp_simple;
 589     comp->u.simple = nmem_malloc(nmem, sizeof(*comp->u.simple));
 590     comp->u.simple->which = Z_ElementSetNames_generic;
 591     comp->u.simple->u.generic = nmem_strdup(nmem, esn);
 592     *comp_p = comp;
 593 }
 594
 595 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 596 {
 597 #if YAZ_HAVE_XML2
 598     yaz_record_conv_t rc = 0;
 599     const char *match_schema = 0;
 600     int *match_syntax = 0;
 601
 602     if (assoc->server)
 603     {
 604         int r;
 605         const char *input_schema = get_esn(rr->comp);
 606         Odr_oid *input_syntax_raw = rr->request_format_raw;
 607
 608         const char *backend_schema = 0;
 609         Odr_oid *backend_syntax = 0;
 610
 611         r = yaz_retrieval_request(assoc->server->retrieval,
 612                                   input_schema,
 613                                   input_syntax_raw,
 614                                   &match_schema,
 615                                   &match_syntax,
 616                                   &rc,
 617                                   &backend_schema,
 618                                   &backend_syntax);
 619         if (r == -1) /* error ? */
 620         {
 621             const char *details = yaz_retrieval_get_error(
 622                 assoc->server->retrieval);
 623
 624             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 625             if (details)
 626                 rr->errstring = odr_strdup(rr->stream, details);
 627             return -1;
 628         }
 629         else if (r == 1 || r == 3)
 630         {
 631             const char *details = input_schema;
 632             rr->errcode =  YAZ_BIB1_ELEMENT_SET_NAMES_UNSUPP;
 633             if (details)
 634                 rr->errstring = odr_strdup(rr->stream, details);
 635             return -1;
 636         }
 637         else if (r == 2)
 638         {
 639             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 640             if (input_syntax_raw)
 641             {
 642                 char oidbuf[OID_STR_MAX];
 643                 oid_to_dotstring(input_syntax_raw, oidbuf);
 644                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 645             }
 646             return -1;
 647         }
 648         if (backend_schema)
 649         {
 650             set_esn(&rr->comp, backend_schema, rr->stream->mem);
 651         }
 652         if (backend_syntax)
 653         {
 654             oident *oident_syntax = oid_getentbyoid(backend_syntax);
 655
 656             rr->request_format_raw = backend_syntax;
 657
 658             if (oident_syntax)
 659                 rr->request_format = oident_syntax->value;
 660             else
 661                 rr->request_format = VAL_NONE;
 662         }
 663     }
 664     (*assoc->init->bend_fetch)(assoc->backend, rr);
 665     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
 666     {   /* post conversion must take place .. */
 667         WRBUF output_record = wrbuf_alloc();
 668         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 669         if (r)
 670         {
 671             const char *details = yaz_record_conv_get_error(rc);
 672             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 673             if (details)
 674                 rr->errstring = odr_strdup(rr->stream, details);
 675         }
 676         else
 677         {
 678             rr->len = wrbuf_len(output_record);
 679             rr->record = odr_malloc(rr->stream, rr->len);
 680             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 681         }
 682         wrbuf_free(output_record, 1);
 683     }
 684     if (match_syntax)
 685     {
 686         struct oident *oi = oid_getentbyoid(match_syntax);
 687         rr->output_format = oi ? oi->value : VAL_NONE;
 688         rr->output_format_raw = match_syntax;
 689     }
 690     if (match_schema)
 691         rr->schema = odr_strdup(rr->stream, match_schema);
 692     return 0;
 693 #else
 694     (*assoc->init->bend_fetch)(assoc->backend, rr);
 695 #endif
 696 }
 697
 698 static int srw_bend_fetch(association *assoc, int pos,
 699                           Z_SRW_searchRetrieveRequest *srw_req,
 700                           Z_SRW_record *record,
 701                           const char **addinfo)
 702 {
 703     bend_fetch_rr rr;
 704     ODR o = assoc->encode;
 705
 706     rr.setname = "default";
 707     rr.number = pos;
 708     rr.referenceId = 0;
 709     rr.request_format = VAL_TEXT_XML;
 710     rr.request_format_raw = yaz_oidval_to_z3950oid(assoc->decode,
 711                                                    CLASS_RECSYN,
 712                                                    VAL_TEXT_XML);
 713     rr.comp = (Z_RecordComposition *)
 714             odr_malloc(assoc->decode, sizeof(*rr.comp));
 715     rr.comp->which = Z_RecordComp_complex;
 716     rr.comp->u.complex = (Z_CompSpec *)
 717             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 718     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 719         odr_malloc(assoc->encode, sizeof(bool_t));
 720     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 721     rr.comp->u.complex->num_dbSpecific = 0;
 722     rr.comp->u.complex->dbSpecific = 0;
 723     rr.comp->u.complex->num_recordSyntax = 0;
 724     rr.comp->u.complex->recordSyntax = 0;
 725
 726     rr.comp->u.complex->generic = (Z_Specification *)
 727             odr_malloc(assoc->decode, sizeof(Z_Specification));
 728
 729     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 730     rr.comp->u.complex->generic->which = Z_Schema_uri;
 731     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 732
 733     /* ESN = recordSchema if recordSchema is present */
 734     rr.comp->u.complex->generic->elementSpec = 0;
 735     if (srw_req->recordSchema)
 736     {
 737         rr.comp->u.complex->generic->elementSpec =
 738             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 739         rr.comp->u.complex->generic->elementSpec->which =
 740             Z_ElementSpec_elementSetName;
 741         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 742             srw_req->recordSchema;
 743     }
 744
 745     rr.stream = assoc->encode;
 746     rr.print = assoc->print;
 747
 748     rr.basename = 0;
 749     rr.len = 0;
 750     rr.record = 0;
 751     rr.last_in_set = 0;
 752     rr.errcode = 0;
 753     rr.errstring = 0;
 754     rr.surrogate_flag = 0;
 755     rr.schema = srw_req->recordSchema;
 756
 757     if (!assoc->init->bend_fetch)
 758         return 1;
 759
 760     retrieve_fetch(assoc, &rr);
 761
 762     if (rr.errcode && rr.surrogate_flag)
 763     {
 764         int code = yaz_diag_bib1_to_srw(rr.errcode);
 765         const char *message = yaz_diag_srw_str(code);
 766         int len = 200;
 767         if (message)
 768             len += strlen(message);
 769         if (rr.errstring)
 770             len += strlen(rr.errstring);
 771
 772         record->recordData_buf = odr_malloc(o, len);
 773
 774         sprintf(record->recordData_buf, "<diagnostic "
 775                 "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
 776                 " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
 777         if (rr.errstring)
 778             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 779                     " <details>%s</details>\n", rr.errstring);
 780         if (message)
 781             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 782                     " <message>%s</message>\n", message);
 783         sprintf(record->recordData_buf + strlen(record->recordData_buf),
 784                 "</diagnostic>\n");
 785         record->recordData_len = strlen(record->recordData_buf);
 786         record->recordPosition = odr_intdup(o, pos);
 787         record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
 788         return 0;
 789     }
 790     else if (rr.len >= 0)
 791     {
 792         record->recordData_buf = rr.record;
 793         record->recordData_len = rr.len;
 794         record->recordPosition = odr_intdup(o, pos);
 795         if (rr.schema)
 796             record->recordSchema = odr_strdup(o, rr.schema);
 797         else
 798             record->recordSchema = 0;
 799     }
 800     if (rr.errcode)
 801     {
 802         *addinfo = rr.errstring;
 803         return rr.errcode;
 804     }
 805     return 0;
 806 }
 807
 808 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 809                    Z_Query *query_result)
 810 {
 811     /* have a CQL query and  CQL to PQF transform .. */
 812     CQL_parser cp = cql_parser_create();
 813     int r;
 814     int srw_errcode = 0;
 815     const char *add = 0;
 816     char rpn_buf[5120];
 817
 818     r = cql_parser_string(cp, cql);
 819     if (r)
 820     {
 821         /* CQL syntax error */
 822         srw_errcode = 10;
 823     }
 824     if (!r)
 825     {
 826         /* Syntax OK */
 827         r = cql_transform_buf(ct,
 828                               cql_parser_result(cp),
 829                               rpn_buf, sizeof(rpn_buf)-1);
 830         if (r)
 831             srw_errcode  = cql_transform_error(ct, &add);
 832     }
 833     if (!r)
 834     {
 835         /* Syntax & transform OK. */
 836         /* Convert PQF string to Z39.50 to RPN query struct */
 837         YAZ_PQF_Parser pp = yaz_pqf_create();
 838         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 839         if (!rpnquery)
 840         {
 841             size_t off;
 842             const char *pqf_msg;
 843             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 844             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 845                     pqf_msg, code);
 846             srw_errcode = 10;
 847         }
 848         else
 849         {
 850             query_result->which = Z_Query_type_1;
 851             query_result->u.type_1 = rpnquery;
 852         }
 853         yaz_pqf_destroy(pp);
 854     }
 855     cql_parser_destroy(cp);
 856     return srw_errcode;
 857 }
 858
 859 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 860                         Z_AttributesPlusTerm *result)
 861 {
 862     Z_Query query;
 863     Z_RPNQuery *rpn;
 864     int srw_error = cql2pqf(odr, cql, ct, &query);
 865     if (srw_error)
 866         return srw_error;
 867     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 868         return 10; /* bad query type */
 869     rpn = query.u.type_1;
 870     if (!rpn->RPNStructure)
 871         return 10; /* must be structure */
 872     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 873         return 10; /* must be simple */
 874     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 875         return 10; /* must be attributes plus term node .. */
 876     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 877            sizeof(*result));
 878     return 0;
 879 }
 880
 881 static void srw_bend_search(association *assoc, request *req,
 882                             Z_SRW_PDU *sr,
 883                             Z_SRW_searchRetrieveResponse *srw_res,
 884                             int *http_code)
 885 {
 886     int srw_error = 0;
 887     Z_External *ext;
 888     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 889
 890     *http_code = 200;
 891     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 892     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 893     if (srw_res->num_diagnostics == 0 && assoc->init)
 894     {
 895         bend_search_rr rr;
 896         rr.setname = "default";
 897         rr.replace_set = 1;
 898         rr.num_bases = 1;
 899         rr.basenames = &srw_req->database;
 900         rr.referenceId = 0;
 901         rr.srw_sortKeys = 0;
 902         rr.srw_setname = 0;
 903         rr.srw_setnameIdleTime = 0;
 904         rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 905         rr.query->u.type_1 = 0;
 906
 907         if (srw_req->query_type == Z_SRW_query_type_cql)
 908         {
 909             if (assoc->server && assoc->server->cql_transform)
 910             {
 911                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 912                                           assoc->server->cql_transform,
 913                                           rr.query);
 914                 if (srw_errcode)
 915                 {
 916                     yaz_add_srw_diagnostic(assoc->encode,
 917                                            &srw_res->diagnostics,
 918                                            &srw_res->num_diagnostics,
 919                                            srw_errcode, 0);
 920                 }
 921             }
 922             else
 923             {
 924                 /* CQL query to backend. Wrap it - Z39.50 style */
 925                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 926                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 927                                                         "1.2.840.10003.16.2");
 928                 ext->indirect_reference = 0;
 929                 ext->descriptor = 0;
 930                 ext->which = Z_External_CQL;
 931                 ext->u.cql = srw_req->query.cql;
 932
 933                 rr.query->which = Z_Query_type_104;
 934                 rr.query->u.type_104 =  ext;
 935             }
 936         }
 937         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 938         {
 939             Z_RPNQuery *RPNquery;
 940             YAZ_PQF_Parser pqf_parser;
 941
 942             pqf_parser = yaz_pqf_create ();
 943
 944             RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
 945                                       srw_req->query.pqf);
 946             if (!RPNquery)
 947             {
 948                 const char *pqf_msg;
 949                 size_t off;
 950                 int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
 951                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 952                         code, pqf_msg, (long) off);
 953                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 954             }
 955
 956             rr.query->which = Z_Query_type_1;
 957             rr.query->u.type_1 =  RPNquery;
 958
 959             yaz_pqf_destroy (pqf_parser);
 960         }
 961         else
 962         {
 963             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 964                                    &srw_res->num_diagnostics,
 965                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 966         }
 967         if (rr.query->u.type_1)
 968         {
 969             rr.stream = assoc->encode;
 970             rr.decode = assoc->decode;
 971             rr.print = assoc->print;
 972             rr.request = req;
 973             if ( srw_req->sort.sortKeys )
 974                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 975                                              srw_req->sort.sortKeys );
 976             rr.association = assoc;
 977             rr.fd = 0;
 978             rr.hits = 0;
 979             rr.errcode = 0;
 980             rr.errstring = 0;
 981             rr.search_info = 0;
 982             yaz_log_zquery_level(log_requestdetail,rr.query);
 983
 984             (assoc->init->bend_search)(assoc->backend, &rr);
 985             if (rr.errcode)
 986             {
 987                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 988                 {
 989                     *http_code = 404;
 990                 }
 991                 else
 992                 {
 993                     srw_error = yaz_diag_bib1_to_srw (rr.errcode);
 994                     yaz_add_srw_diagnostic(assoc->encode,
 995                                            &srw_res->diagnostics,
 996                                            &srw_res->num_diagnostics,
 997                                            srw_error, rr.errstring);
 998                 }
 999             }
1000             else
1001             {
1002                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
1003                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
1004
1005                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
1006                         start, number, rr.hits);
1007
1008                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
1009                 if (rr.srw_setname)
1010                 {
1011                     srw_res->resultSetId =
1012                         odr_strdup(assoc->encode, rr.srw_setname );
1013                     srw_res->resultSetIdleTime =
1014                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
1015                 }
1016
1017                 if (start > rr.hits || start < 1)
1018                 {
1019                     yaz_add_srw_diagnostic(
1020                         assoc->encode,
1021                         &srw_res->diagnostics, &srw_res->num_diagnostics,
1022                         YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1023                 }
1024                 else if (number > 0)
1025                 {
1026                     int i;
1027                     int ok = 1;
1028                     if (start + number > rr.hits)
1029                         number = rr.hits - start + 1;
1030
1031                     /* Call bend_present if defined */
1032                     if (assoc->init->bend_present)
1033                     {
1034                         bend_present_rr *bprr = (bend_present_rr*)
1035                             odr_malloc (assoc->decode, sizeof(*bprr));
1036                         bprr->setname = "default";
1037                         bprr->start = start;
1038                         bprr->number = number;
1039                         bprr->format = VAL_TEXT_XML;
1040                         if (srw_req->recordSchema)
1041                         {
1042                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1043                                                                             sizeof(*bprr->comp));
1044                             bprr->comp->which = Z_RecordComp_simple;
1045                             bprr->comp->u.simple = (Z_ElementSetNames *)
1046                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1047                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1048                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1049                         }
1050                         else
1051                         {
1052                             bprr->comp = 0;
1053                         }
1054                         bprr->stream = assoc->encode;
1055                         bprr->referenceId = 0;
1056                         bprr->print = assoc->print;
1057                         bprr->request = req;
1058                         bprr->association = assoc;
1059                         bprr->errcode = 0;
1060                         bprr->errstring = NULL;
1061                         (*assoc->init->bend_present)(assoc->backend, bprr);
1062
1063                         if (!bprr->request)
1064                             return;
1065                         if (bprr->errcode)
1066                         {
1067                             srw_error = yaz_diag_bib1_to_srw (bprr->errcode);
1068                             yaz_add_srw_diagnostic(assoc->encode,
1069                                                    &srw_res->diagnostics,
1070                                                    &srw_res->num_diagnostics,
1071                                                    srw_error, bprr->errstring);
1072                             ok = 0;
1073                         }
1074                     }
1075
1076                     if (ok)
1077                     {
1078                         int j = 0;
1079                         int packing = Z_SRW_recordPacking_string;
1080                         if (srw_req->recordPacking){
1081                             if (!strcmp(srw_req->recordPacking, "xml"))
1082                                 packing = Z_SRW_recordPacking_XML;
1083                             if (!strcmp(srw_req->recordPacking, "url"))
1084                                 packing = Z_SRW_recordPacking_URL;
1085                         }
1086                         srw_res->records = (Z_SRW_record *)
1087                             odr_malloc(assoc->encode,
1088                                        number * sizeof(*srw_res->records));
1089
1090                         srw_res->extra_records = (Z_SRW_extra_record **)
1091                             odr_malloc(assoc->encode,
1092                                        number*sizeof(*srw_res->extra_records));
1093
1094                         for (i = 0; i<number; i++)
1095                         {
1096                             int errcode;
1097                             const char *addinfo = 0;
1098
1099                             srw_res->records[j].recordPacking = packing;
1100                             srw_res->records[j].recordData_buf = 0;
1101                             srw_res->extra_records[j] = 0;
1102                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1103                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1104                                                      srw_res->records + j,
1105                                                      &addinfo);
1106                             if (errcode)
1107                             {
1108                                 yaz_add_srw_diagnostic(assoc->encode,
1109                                                        &srw_res->diagnostics,
1110                                                        &srw_res->num_diagnostics,
1111                                                        yaz_diag_bib1_to_srw (errcode),
1112                                                        addinfo);
1113
1114                                 break;
1115                             }
1116                             if (srw_res->records[j].recordData_buf)
1117                                 j++;
1118                         }
1119                         srw_res->num_records = j;
1120                         if (!j)
1121                             srw_res->records = 0;
1122                     }
1123                 }
1124             }
1125         }
1126     }
1127     if (log_request)
1128     {
1129         const char *querystr = "?";
1130         const char *querytype = "?";
1131         WRBUF wr = wrbuf_alloc();
1132
1133         switch (srw_req->query_type)
1134         {
1135         case Z_SRW_query_type_cql:
1136             querytype = "CQL";
1137             querystr = srw_req->query.cql;
1138             break;
1139         case Z_SRW_query_type_pqf:
1140             querytype = "PQF";
1141             querystr = srw_req->query.pqf;
1142             break;
1143         }
1144         wrbuf_printf(wr, "SRWSearch ");
1145         wrbuf_printf(wr, srw_req->database);
1146         wrbuf_printf(wr, " ");
1147         if (srw_res->num_diagnostics)
1148             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1149         else if (*http_code != 200)
1150             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1151         else if (srw_res->numberOfRecords)
1152         {
1153             wrbuf_printf(wr, "OK %d",
1154                          (srw_res->numberOfRecords ?
1155                           *srw_res->numberOfRecords : 0));
1156         }
1157         wrbuf_printf(wr, " %s %d+%d",
1158                      (srw_res->resultSetId ?
1159                       srw_res->resultSetId : "-"),
1160                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1161                      srw_res->num_records);
1162         yaz_log(log_request, "%s %s: %s", wrbuf_buf(wr), querytype, querystr);
1163         wrbuf_free(wr, 1);
1164     }
1165 }
1166
1167 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1168 {
1169 #if YAZ_HAVE_XML2
1170     xmlNodePtr ptr = rr->server_node_ptr;
1171     if (!ptr)
1172         return 0;
1173     for (ptr = ptr->children; ptr; ptr = ptr->next)
1174     {
1175         if (ptr->type != XML_ELEMENT_NODE)
1176             continue;
1177         if (!strcmp((const char *) ptr->name, "explain"))
1178         {
1179             int len;
1180             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1181             xmlChar *buf_out;
1182             char *content;
1183
1184             ptr = xmlCopyNode(ptr, 1);
1185
1186             xmlDocSetRootElement(doc, ptr);
1187
1188             xmlDocDumpMemory(doc, &buf_out, &len);
1189             content = (char*) odr_malloc(rr->stream, 1+len);
1190             memcpy(content, buf_out, len);
1191             content[len] = '\0';
1192
1193             xmlFree(buf_out);
1194             xmlFreeDoc(doc);
1195             rr->explain_buf = content;
1196             return 0;
1197         }
1198     }
1199 #endif
1200     return 0;
1201 }
1202
1203 static void srw_bend_explain(association *assoc, request *req,
1204                              Z_SRW_PDU *sr,
1205                              Z_SRW_explainResponse *srw_res,
1206                              int *http_code)
1207 {
1208     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1209     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1210     *http_code = 404;
1211     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1212     if (assoc->init)
1213     {
1214         bend_explain_rr rr;
1215
1216         rr.stream = assoc->encode;
1217         rr.decode = assoc->decode;
1218         rr.print = assoc->print;
1219         rr.explain_buf = 0;
1220         rr.database = srw_req->database;
1221         if (assoc->server)
1222             rr.server_node_ptr = assoc->server->server_node_ptr;
1223         else
1224             rr.server_node_ptr = 0;
1225         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1226         if (assoc->init->bend_explain)
1227             (*assoc->init->bend_explain)(assoc->backend, &rr);
1228         else
1229             srw_bend_explain_default(assoc->backend, &rr);
1230
1231         if (rr.explain_buf)
1232         {
1233             int packing = Z_SRW_recordPacking_string;
1234             if (srw_req->recordPacking)
1235             {
1236                 if (!strcmp(srw_req->recordPacking, "xml"))
1237                     packing = Z_SRW_recordPacking_XML;
1238                 else if (!strcmp(srw_req->recordPacking, "url"))
1239                     packing = Z_SRW_recordPacking_URL;
1240             }
1241             srw_res->record.recordSchema = rr.schema;
1242             srw_res->record.recordPacking = packing;
1243             srw_res->record.recordData_buf = rr.explain_buf;
1244             srw_res->record.recordData_len = strlen(rr.explain_buf);
1245             srw_res->record.recordPosition = 0;
1246             *http_code = 200;
1247         }
1248     }
1249 }
1250
1251 static void srw_bend_scan(association *assoc, request *req,
1252                           Z_SRW_PDU *sr,
1253                           Z_SRW_scanResponse *srw_res,
1254                           int *http_code)
1255 {
1256     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1257     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1258
1259     *http_code = 200;
1260     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1261     if (srw_res->num_diagnostics == 0 && assoc->init)
1262     {
1263         struct scan_entry *save_entries;
1264
1265         bend_scan_rr *bsrr = (bend_scan_rr *)
1266             odr_malloc (assoc->encode, sizeof(*bsrr));
1267         bsrr->num_bases = 1;
1268         bsrr->basenames = &srw_req->database;
1269
1270         bsrr->num_entries = srw_req->maximumTerms ?
1271             *srw_req->maximumTerms : 10;
1272         bsrr->term_position = srw_req->responsePosition ?
1273             *srw_req->responsePosition : 1;
1274
1275         bsrr->errcode = 0;
1276         bsrr->errstring = 0;
1277         bsrr->referenceId = 0;
1278         bsrr->stream = assoc->encode;
1279         bsrr->print = assoc->print;
1280         bsrr->step_size = odr_intdup(assoc->decode, 0);
1281         bsrr->entries = 0;
1282
1283         if (bsrr->num_entries > 0)
1284         {
1285             int i;
1286             bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1287                                        bsrr->num_entries);
1288             for (i = 0; i<bsrr->num_entries; i++)
1289             {
1290                 bsrr->entries[i].term = 0;
1291                 bsrr->entries[i].occurrences = 0;
1292                 bsrr->entries[i].errcode = 0;
1293                 bsrr->entries[i].errstring = 0;
1294                 bsrr->entries[i].display_term = 0;
1295             }
1296         }
1297         save_entries = bsrr->entries;  /* save it so we can compare later */
1298
1299         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1300             assoc->init->bend_scan)
1301         {
1302             Odr_oid *scan_attributeSet = 0;
1303             oident *attset;
1304             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1305
1306             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1307                                       &scan_attributeSet,
1308                                       srw_req->scanClause.pqf);
1309             if (scan_attributeSet &&
1310                 (attset = oid_getentbyoid(scan_attributeSet)) &&
1311                 (attset->oclass == CLASS_ATTSET ||
1312                  attset->oclass == CLASS_GENERAL))
1313                 bsrr->attributeset = attset->value;
1314             else
1315                 bsrr->attributeset = VAL_NONE;
1316             yaz_pqf_destroy(pqf_parser);
1317             bsrr->scanClause = 0;
1318             ((int (*)(void *, bend_scan_rr *))
1319              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1320         }
1321         else if (srw_req->query_type == Z_SRW_query_type_cql
1322                  && assoc->init->bend_scan && assoc->server
1323                  && assoc->server->cql_transform)
1324         {
1325             int srw_error;
1326             bsrr->scanClause = 0;
1327             bsrr->attributeset = VAL_NONE;
1328             bsrr->term = odr_malloc(assoc->decode, sizeof(*bsrr->term));
1329             srw_error = cql2pqf_scan(assoc->encode,
1330                                      srw_req->scanClause.cql,
1331                                      assoc->server->cql_transform,
1332                                      bsrr->term);
1333             if (srw_error)
1334                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1335                                        &srw_res->num_diagnostics,
1336                                        srw_error, 0);
1337             else
1338             {
1339                 ((int (*)(void *, bend_scan_rr *))
1340                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1341             }
1342         }
1343         else if (srw_req->query_type == Z_SRW_query_type_cql
1344                  && assoc->init->bend_srw_scan)
1345         {
1346             bsrr->term = 0;
1347             bsrr->attributeset = VAL_NONE;
1348             bsrr->scanClause = srw_req->scanClause.cql;
1349             ((int (*)(void *, bend_scan_rr *))
1350              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1351         }
1352         else
1353         {
1354             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1355                                    &srw_res->num_diagnostics,
1356                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1357         }
1358         if (bsrr->errcode)
1359         {
1360             int srw_error;
1361             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1362             {
1363                 *http_code = 404;
1364                 return;
1365             }
1366             srw_error = yaz_diag_bib1_to_srw (bsrr->errcode);
1367
1368             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1369                                    &srw_res->num_diagnostics,
1370                                    srw_error, bsrr->errstring);
1371         }
1372         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1373         {
1374             int i;
1375             srw_res->terms = (Z_SRW_scanTerm*)
1376                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1377                            bsrr->num_entries);
1378
1379             srw_res->num_terms =  bsrr->num_entries;
1380             for (i = 0; i<bsrr->num_entries; i++)
1381             {
1382                 Z_SRW_scanTerm *t = srw_res->terms + i;
1383                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1384                 t->numberOfRecords =
1385                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1386                 t->displayTerm = 0;
1387                 if (save_entries == bsrr->entries &&
1388                     bsrr->entries[i].display_term)
1389                 {
1390                     /* the entries was _not_ set by the handler. So it's
1391                        safe to test for new member display_term. It is
1392                        NULL'ed by us.
1393                     */
1394                     t->displayTerm = odr_strdup(assoc->encode,
1395                                                 bsrr->entries[i].display_term);
1396                 }
1397                 t->whereInList = 0;
1398             }
1399         }
1400     }
1401     if (log_request)
1402     {
1403         WRBUF wr = wrbuf_alloc();
1404         const char *querytype = 0;
1405         const char *querystr = 0;
1406
1407         switch(srw_req->query_type)
1408         {
1409         case Z_SRW_query_type_pqf:
1410             querytype = "PQF";
1411             querystr = srw_req->scanClause.pqf;
1412             break;
1413         case Z_SRW_query_type_cql:
1414             querytype = "CQL";
1415             querystr = srw_req->scanClause.cql;
1416             break;
1417         default:
1418             querytype = "UNKNOWN";
1419             querystr = "";
1420         }
1421
1422         wrbuf_printf(wr, "SRWScan ");
1423         wrbuf_printf(wr, srw_req->database);
1424         wrbuf_printf(wr, " ");
1425
1426         if (srw_res->num_diagnostics)
1427             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1428         else if (srw_res->num_terms)
1429             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1430         else
1431             wrbuf_printf(wr, "OK - - ");
1432
1433         wrbuf_printf(wr, "%d+%d+0 ",
1434                      (srw_req->responsePosition ?
1435                       *srw_req->responsePosition : 1),
1436                      (srw_req->maximumTerms ?
1437                       *srw_req->maximumTerms : 1));
1438         /* there is no step size in SRU/W ??? */
1439         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1440         yaz_log(log_request, "%s ", wrbuf_buf(wr) );
1441         wrbuf_free(wr, 1);
1442     }
1443
1444 }
1445
1446 static void srw_bend_update(association *assoc, request *req,
1447                             Z_SRW_PDU *sr,
1448                             Z_SRW_updateResponse *srw_res,
1449                             int *http_code)
1450 {
1451     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1452     yaz_log(YLOG_DEBUG, "Got SRW UpdateRequest");
1453     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1454     *http_code = 404;
1455     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1456     if (assoc->init)
1457     {
1458         bend_update_rr rr;
1459
1460         rr.stream = assoc->encode;
1461         rr.print = assoc->print;
1462         rr.num_bases = 1;
1463         rr.basenames = &srw_req->database;
1464         rr.operation = srw_req->operation;
1465         rr.operation_status = "failed";
1466         rr.record_id = 0;
1467         rr.record_version = 0;
1468         rr.record_checksum = 0;
1469         rr.record_old_version = 0;
1470         rr.record_packing = "xml";
1471         rr.record_schema = 0;
1472         rr.record_data = 0;
1473         rr.request_extra_record = 0;
1474         rr.response_extra_record = 0;
1475         rr.extra_request_data = 0;
1476         rr.extra_response_data = 0;
1477         rr.uri = 0;
1478         rr.message = 0;
1479         rr.details = 0;
1480
1481         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1482         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1483         if ( !strcmp( rr.operation, "delete" ) ){
1484             if ( !srw_req->recordId ){
1485                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1486                                        &srw_res->num_diagnostics,
1487                                        7, "recordId" );
1488             }
1489             else {
1490                 rr.record_id = srw_req->recordId;
1491             }
1492             if (  !srw_req->recordVersion ){
1493                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1494                                        &srw_res->num_diagnostics,
1495                                        7, "recordVersion" );
1496             }
1497             else {
1498                 rr.record_version = odr_strdup( assoc->encode,
1499                                                 srw_req->recordVersion );
1500
1501             }
1502             if ( srw_req->recordOldVersion ){
1503                 rr.record_old_version = odr_strdup(assoc->encode,
1504                                                    srw_req->recordOldVersion );
1505             }
1506             if ( srw_req->extraRequestData ){
1507                 rr.extra_request_data = odr_strdup(assoc->encode,
1508                                                    srw_req->extraRequestData );
1509             }
1510         }
1511         else if ( !strcmp( rr.operation, "replace" ) ){
1512             if ( !srw_req->recordId ){
1513                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1514                                        &srw_res->num_diagnostics,
1515                                        7, "recordId" );
1516             }
1517             else {
1518                 rr.record_id = srw_req->recordId;
1519             }
1520             if ( srw_req->record.recordSchema == 0 ){
1521                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1522                                        &srw_res->num_diagnostics,
1523                                        7, "recordSchema" );
1524             }
1525             else {
1526                 rr.record_schema = odr_strdup(assoc->encode,
1527                                               srw_req->record.recordSchema );
1528             }
1529             switch (srw_req->record.recordPacking)
1530             {
1531             case Z_SRW_recordPacking_string:
1532                 rr.record_packing = "string";
1533                 break;
1534             case Z_SRW_recordPacking_XML:
1535                 rr.record_packing = "xml";
1536                 break;
1537             case Z_SRW_recordPacking_URL:
1538                 rr.record_packing = "url";
1539                 break;
1540             }
1541             if ( srw_req->record.recordData_len ){
1542                 rr.record_data = odr_strdupn(assoc->encode,
1543                                              srw_req->record.recordData_buf,
1544                                              srw_req->record.recordData_len );
1545                 rr.request_extra_record = srw_req->extra_record;
1546             }
1547             else {
1548                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1549                                        &srw_res->num_diagnostics,
1550                                        7, "recordData" );
1551             }
1552             if (srw_req->extraRequestData)
1553                 rr.extra_request_data = odr_strdup(assoc->encode,
1554                                                    srw_req->extraRequestData );
1555         }
1556         else if ( !strcmp( rr.operation, "insert" ) )
1557         {
1558             rr.record_id = srw_req->recordId;
1559             if ( srw_req->record.recordSchema == 0 ){
1560                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1561                                        &srw_res->num_diagnostics,
1562                                        7, "recordSchema" );
1563             }
1564             else {
1565                 rr.record_schema = odr_strdup(assoc->encode,
1566                                               srw_req->record.recordSchema);
1567             }
1568             switch (srw_req->record.recordPacking)
1569             {
1570             case Z_SRW_recordPacking_string:
1571                 rr.record_packing = "string";
1572                 break;
1573             case Z_SRW_recordPacking_XML:
1574                 rr.record_packing = "xml";
1575                 break;
1576             case Z_SRW_recordPacking_URL:
1577                 rr.record_packing = "url";
1578                 break;
1579             }
1580
1581             if (srw_req->record.recordData_len)
1582             {
1583                 rr.record_data = odr_strdupn(assoc->encode,
1584                                              srw_req->record.recordData_buf,
1585                                              srw_req->record.recordData_len );
1586                 rr.request_extra_record = srw_req->extra_record;
1587             }
1588             else
1589                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1590                                        &srw_res->num_diagnostics,
1591                                        7, "recordData" );
1592             if ( srw_req->extraRequestData )
1593                 rr.extra_request_data = odr_strdup(assoc->encode,
1594                                                    srw_req->extraRequestData );
1595         }
1596         if (srw_res->num_diagnostics == 0)
1597         {
1598             if ( assoc->init->bend_srw_update)
1599                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1600             else {
1601                 yaz_log( YLOG_WARN, "Got No Update function!");
1602                 return;
1603             }
1604         }
1605
1606         if (rr.uri)
1607             yaz_add_srw_diagnostic_uri(assoc->encode,
1608                                        &srw_res->diagnostics,
1609                                        &srw_res->num_diagnostics,
1610                                        rr.uri,
1611                                        rr.message,
1612                                        rr.details);
1613         srw_res->recordId = rr.record_id;
1614         srw_res->operationStatus = rr.operation_status;
1615         srw_res->recordVersion = rr.record_version;
1616         srw_res->recordChecksum = rr.record_checksum;
1617         srw_res->extraResponseData = rr.extra_response_data;
1618         srw_res->record.recordPosition = 0;
1619         if (srw_res->num_diagnostics == 0 && rr.record_data)
1620         {
1621             srw_res->record.recordSchema = rr.record_schema;
1622             srw_res->record.recordPacking = srw_req->record.recordPacking;
1623             srw_res->record.recordData_buf = rr.record_data;
1624             srw_res->record.recordData_len = strlen(rr.record_data);
1625             srw_res->extra_record = rr.response_extra_record;
1626
1627         }
1628         else
1629             srw_res->record.recordData_len = 0;
1630         *http_code = 200;
1631     }
1632 }
1633
1634 /* check if path is OK (1); BAD (0) */
1635 static int check_path(const char *path)
1636 {
1637     if (*path != '/')
1638         return 0;
1639     if (strstr(path, ".."))
1640         return 0;
1641     return 1;
1642 }
1643
1644 static char *read_file(const char *fname, ODR o, int *sz)
1645 {
1646     char *buf;
1647     FILE *inf = fopen(fname, "rb");
1648     if (!inf)
1649         return 0;
1650
1651     fseek(inf, 0L, SEEK_END);
1652     *sz = ftell(inf);
1653     rewind(inf);
1654     buf = odr_malloc(o, *sz);
1655     fread(buf, 1, *sz, inf);
1656     fclose(inf);
1657     return buf;
1658 }
1659
1660 static void process_http_request(association *assoc, request *req)
1661 {
1662     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1663     ODR o = assoc->encode;
1664     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1665     Z_SRW_PDU *sr = 0;
1666     Z_SOAP *soap_package = 0;
1667     Z_GDU *p = 0;
1668     char *charset = 0;
1669     Z_HTTP_Response *hres = 0;
1670     int keepalive = 1;
1671     const char *stylesheet = 0; /* for now .. set later */
1672     Z_SRW_diagnostic *diagnostic = 0;
1673     int num_diagnostic = 0;
1674     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1675
1676     if (!control_association(assoc, host, 0))
1677     {
1678         p = z_get_HTTP_Response(o, 404);
1679         r = 1;
1680     }
1681     if (r == 2 && assoc->server && assoc->server->docpath
1682         && hreq->path[0] == '/'
1683         &&
1684         /* check if path is a proper prefix of documentroot */
1685         strncmp(hreq->path+1, assoc->server->docpath,
1686                 strlen(assoc->server->docpath))
1687         == 0)
1688     {
1689         if (!check_path(hreq->path))
1690         {
1691             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1692             p = z_get_HTTP_Response(o, 404);
1693         }
1694         else
1695         {
1696             int content_size = 0;
1697             char *content_buf = read_file(hreq->path+1, o, &content_size);
1698             if (!content_buf)
1699             {
1700                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1701                 p = z_get_HTTP_Response(o, 404);
1702             }
1703             else
1704             {
1705                 const char *ctype = 0;
1706                 yaz_mime_types types = yaz_mime_types_create();
1707
1708                 yaz_mime_types_add(types, "xsl", "application/xml");
1709                 yaz_mime_types_add(types, "xml", "application/xml");
1710                 yaz_mime_types_add(types, "css", "text/css");
1711                 yaz_mime_types_add(types, "html", "text/html");
1712                 yaz_mime_types_add(types, "htm", "text/html");
1713                 yaz_mime_types_add(types, "txt", "text/plain");
1714                 yaz_mime_types_add(types, "js", "application/x-javascript");
1715
1716                 yaz_mime_types_add(types, "gif", "image/gif");
1717                 yaz_mime_types_add(types, "png", "image/png");
1718                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1719                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1720
1721                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1722                 if (!ctype)
1723                 {
1724                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1725                     p = z_get_HTTP_Response(o, 404);
1726                 }
1727                 else
1728                 {
1729                     p = z_get_HTTP_Response(o, 200);
1730                     hres = p->u.HTTP_Response;
1731                     hres->content_buf = content_buf;
1732                     hres->content_len = content_size;
1733                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1734                 }
1735                 yaz_mime_types_destroy(types);
1736             }
1737         }
1738         r = 1;
1739     }
1740
1741     if (r == 2)
1742     {
1743         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1744         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1745     }
1746     if (r == 2)  /* not taken */
1747     {
1748         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1749                            &diagnostic, &num_diagnostic);
1750         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1751     }
1752     if (r == 0)  /* decode SRW/SRU OK .. */
1753     {
1754         int http_code = 200;
1755         if (sr->which == Z_SRW_searchRetrieve_request)
1756         {
1757             Z_SRW_PDU *res =
1758                 yaz_srw_get(assoc->encode, Z_SRW_searchRetrieve_response);
1759
1760             stylesheet = sr->u.request->stylesheet;
1761             if (num_diagnostic)
1762             {
1763                 res->u.response->diagnostics = diagnostic;
1764                 res->u.response->num_diagnostics = num_diagnostic;
1765             }
1766             else
1767             {
1768                 srw_bend_search(assoc, req, sr, res->u.response,
1769                                 &http_code);
1770             }
1771             if (http_code == 200)
1772                 soap_package->u.generic->p = res;
1773         }
1774         else if (sr->which == Z_SRW_explain_request)
1775         {
1776             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
1777             stylesheet = sr->u.explain_request->stylesheet;
1778             if (num_diagnostic)
1779             {
1780                 res->u.explain_response->diagnostics = diagnostic;
1781                 res->u.explain_response->num_diagnostics = num_diagnostic;
1782             }
1783             srw_bend_explain(assoc, req, sr,
1784                              res->u.explain_response, &http_code);
1785             if (http_code == 200)
1786                 soap_package->u.generic->p = res;
1787         }
1788         else if (sr->which == Z_SRW_scan_request)
1789         {
1790             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_scan_response);
1791             stylesheet = sr->u.scan_request->stylesheet;
1792             if (num_diagnostic)
1793             {
1794                 res->u.scan_response->diagnostics = diagnostic;
1795                 res->u.scan_response->num_diagnostics = num_diagnostic;
1796             }
1797             srw_bend_scan(assoc, req, sr,
1798                           res->u.scan_response, &http_code);
1799             if (http_code == 200)
1800                 soap_package->u.generic->p = res;
1801         }
1802         else if (sr->which == Z_SRW_update_request)
1803         {
1804             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_update_response);
1805             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1806             if (num_diagnostic)
1807             {
1808                 res->u.update_response->diagnostics = diagnostic;
1809                 res->u.update_response->num_diagnostics = num_diagnostic;
1810             }
1811             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1812             srw_bend_update(assoc, req, sr,
1813                             res->u.update_response, &http_code);
1814             if (http_code == 200)
1815                 soap_package->u.generic->p = res;
1816         }
1817         else
1818         {
1819             yaz_log(log_request, "SOAP ERROR");
1820             /* FIXME - what error, what query */
1821             http_code = 500;
1822             z_soap_error(assoc->encode, soap_package,
1823                          "SOAP-ENV:Client", "Bad method", 0);
1824         }
1825         if (http_code == 200 || http_code == 500)
1826         {
1827             static Z_SOAP_Handler soap_handlers[4] = {
1828 #if YAZ_HAVE_XML2
1829                 {"http://www.loc.gov/zing/srw/", 0,
1830                  (Z_SOAP_fun) yaz_srw_codec},
1831                 {"http://www.loc.gov/zing/srw/v1.0/", 0,
1832                  (Z_SOAP_fun) yaz_srw_codec},
1833                 {"http://www.loc.gov/zing/srw/update/", 0,
1834                  (Z_SOAP_fun) yaz_ucp_codec},
1835 #endif
1836                 {0, 0, 0}
1837             };
1838             char ctype[60];
1839             int ret;
1840             p = z_get_HTTP_Response(o, 200);
1841             hres = p->u.HTTP_Response;
1842
1843             if (!stylesheet && assoc->server)
1844                 stylesheet = assoc->server->stylesheet;
1845
1846             /* empty stylesheet means NO stylesheet */
1847             if (stylesheet && *stylesheet == '\0')
1848                 stylesheet = 0;
1849
1850             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1851                                        &hres->content_buf, &hres->content_len,
1852                                        soap_handlers, charset, stylesheet);
1853             hres->code = http_code;
1854
1855             strcpy(ctype, "text/xml");
1856             if (charset)
1857             {
1858                 strcat(ctype, "; charset=");
1859                 strcat(ctype, charset);
1860             }
1861             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1862         }
1863         else
1864             p = z_get_HTTP_Response(o, http_code);
1865     }
1866
1867     if (p == 0)
1868         p = z_get_HTTP_Response(o, 500);
1869     hres = p->u.HTTP_Response;
1870     if (!strcmp(hreq->version, "1.0"))
1871     {
1872         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1873         if (v && !strcmp(v, "Keep-Alive"))
1874             keepalive = 1;
1875         else
1876             keepalive = 0;
1877         hres->version = "1.0";
1878     }
1879     else
1880     {
1881         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1882         if (v && !strcmp(v, "close"))
1883             keepalive = 0;
1884         else
1885             keepalive = 1;
1886         hres->version = "1.1";
1887     }
1888     if (!keepalive)
1889     {
1890         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1891         assoc->state = ASSOC_DEAD;
1892         assoc->cs_get_mask = 0;
1893     }
1894     else
1895     {
1896         int t;
1897         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1898
1899         if (alive && isdigit(*(const unsigned char *) alive))
1900             t = atoi(alive);
1901         else
1902             t = 15;
1903         if (t < 0 || t > 3600)
1904             t = 3600;
1905         iochan_settimeout(assoc->client_chan,t);
1906         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1907     }
1908     process_gdu_response(assoc, req, p);
1909 }
1910
1911 static void process_gdu_request(association *assoc, request *req)
1912 {
1913     if (req->gdu_request->which == Z_GDU_Z3950)
1914     {
1915         char *msg = 0;
1916         req->apdu_request = req->gdu_request->u.z3950;
1917         if (process_z_request(assoc, req, &msg) < 0)
1918             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1919     }
1920     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1921         process_http_request(assoc, req);
1922     else
1923     {
1924         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1925     }
1926 }
1927
1928 /*
1929  * Initiate request processing.
1930  */
1931 static int process_z_request(association *assoc, request *req, char **msg)
1932 {
1933     int fd = -1;
1934     Z_APDU *res;
1935     int retval;
1936
1937     *msg = "Unknown Error";
1938     assert(req && req->state == REQUEST_IDLE);
1939     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1940     {
1941         *msg = "Missing InitRequest";
1942         return -1;
1943     }
1944     switch (req->apdu_request->which)
1945     {
1946     case Z_APDU_initRequest:
1947         res = process_initRequest(assoc, req); break;
1948     case Z_APDU_searchRequest:
1949         res = process_searchRequest(assoc, req, &fd); break;
1950     case Z_APDU_presentRequest:
1951         res = process_presentRequest(assoc, req, &fd); break;
1952     case Z_APDU_scanRequest:
1953         if (assoc->init->bend_scan)
1954             res = process_scanRequest(assoc, req, &fd);
1955         else
1956         {
1957             *msg = "Cannot handle Scan APDU";
1958             return -1;
1959         }
1960         break;
1961     case Z_APDU_extendedServicesRequest:
1962         if (assoc->init->bend_esrequest)
1963             res = process_ESRequest(assoc, req, &fd);
1964         else
1965         {
1966             *msg = "Cannot handle Extended Services APDU";
1967             return -1;
1968         }
1969         break;
1970     case Z_APDU_sortRequest:
1971         if (assoc->init->bend_sort)
1972             res = process_sortRequest(assoc, req, &fd);
1973         else
1974         {
1975             *msg = "Cannot handle Sort APDU";
1976             return -1;
1977         }
1978         break;
1979     case Z_APDU_close:
1980         process_close(assoc, req);
1981         return 0;
1982     case Z_APDU_deleteResultSetRequest:
1983         if (assoc->init->bend_delete)
1984             res = process_deleteRequest(assoc, req, &fd);
1985         else
1986         {
1987             *msg = "Cannot handle Delete APDU";
1988             return -1;
1989         }
1990         break;
1991     case Z_APDU_segmentRequest:
1992         if (assoc->init->bend_segment)
1993         {
1994             res = process_segmentRequest (assoc, req);
1995         }
1996         else
1997         {
1998             *msg = "Cannot handle Segment APDU";
1999             return -1;
2000         }
2001         break;
2002     case Z_APDU_triggerResourceControlRequest:
2003         return 0;
2004     default:
2005         *msg = "Bad APDU received";
2006         return -1;
2007     }
2008     if (res)
2009     {
2010         yaz_log(YLOG_DEBUG, "  result immediately available");
2011         retval = process_z_response(assoc, req, res);
2012     }
2013     else if (fd < 0)
2014     {
2015         yaz_log(YLOG_DEBUG, "  result unavailble");
2016         retval = 0;
2017     }
2018     else /* no result yet - one will be provided later */
2019     {
2020         IOCHAN chan;
2021
2022         /* Set up an I/O handler for the fd supplied by the backend */
2023
2024         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2025         req->state = REQUEST_PENDING;
2026         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2027             abort();
2028         iochan_setdata(chan, assoc);
2029         retval = 0;
2030     }
2031     return retval;
2032 }
2033
2034 /*
2035  * Handle message from the backend.
2036  */
2037 void backend_response(IOCHAN i, int event)
2038 {
2039     association *assoc = (association *)iochan_getdata(i);
2040     request *req = request_head(&assoc->incoming);
2041     Z_APDU *res;
2042     int fd;
2043
2044     yaz_log(YLOG_DEBUG, "backend_response");
2045     assert(assoc && req && req->state != REQUEST_IDLE);
2046     /* determine what it is we're waiting for */
2047     switch (req->apdu_request->which)
2048     {
2049         case Z_APDU_searchRequest:
2050             res = response_searchRequest(assoc, req, 0, &fd); break;
2051 #if 0
2052         case Z_APDU_presentRequest:
2053             res = response_presentRequest(assoc, req, 0, &fd); break;
2054         case Z_APDU_scanRequest:
2055             res = response_scanRequest(assoc, req, 0, &fd); break;
2056 #endif
2057         default:
2058             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2059             abort();
2060     }
2061     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2062     {
2063         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2064         do_close(assoc, Z_Close_systemProblem, 0);
2065         iochan_destroy(i);
2066         return;
2067     }
2068     else if (!res) /* no result yet - try again later */
2069     {
2070         yaz_log(YLOG_DEBUG, "   no result yet");
2071         iochan_setfd(i, fd); /* in case fd has changed */
2072     }
2073 }
2074
2075 /*
2076  * Encode response, and transfer the request structure to the outgoing queue.
2077  */
2078 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2079 {
2080     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2081
2082     if (assoc->print)
2083     {
2084         if (!z_GDU(assoc->print, &res, 0, 0))
2085             yaz_log(YLOG_WARN, "ODR print error: %s",
2086                 odr_errmsg(odr_geterror(assoc->print)));
2087         odr_reset(assoc->print);
2088     }
2089     if (!z_GDU(assoc->encode, &res, 0, 0))
2090     {
2091         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2092                 odr_errmsg(odr_geterror(assoc->decode)),
2093                 odr_getelement(assoc->decode));
2094         return -1;
2095     }
2096     req->response = odr_getbuf(assoc->encode, &req->len_response,
2097         &req->size_response);
2098     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2099     odr_reset(assoc->encode);
2100     req->state = REQUEST_IDLE;
2101     request_enq(&assoc->outgoing, req);
2102     /* turn the work over to the ir_session handler */
2103     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2104     assoc->cs_put_mask = EVENT_OUTPUT;
2105     /* Is there more work to be done? give that to the input handler too */
2106 #if 1
2107     if (request_head(&assoc->incoming))
2108     {
2109         yaz_log (YLOG_DEBUG, "more work to be done");
2110         iochan_setevent(assoc->client_chan, EVENT_WORK);
2111     }
2112 #endif
2113     return 0;
2114 }
2115
2116 /*
2117  * Encode response, and transfer the request structure to the outgoing queue.
2118  */
2119 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2120 {
2121     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2122     gres->which = Z_GDU_Z3950;
2123     gres->u.z3950 = res;
2124
2125     return process_gdu_response(assoc, req, gres);
2126 }
2127
2128 static char *get_vhost(Z_OtherInformation *otherInfo)
2129 {
2130     return yaz_oi_get_string_oidval(&otherInfo, VAL_PROXY, 1, 0);
2131 }
2132
2133 /*
2134  * Handle init request.
2135  * At the moment, we don't check the options
2136  * anywhere else in the code - we just try not to do anything that would
2137  * break a naive client. We'll toss 'em into the association block when
2138  * we need them there.
2139  */
2140 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2141 {
2142     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2143     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2144     Z_InitResponse *resp = apdu->u.initResponse;
2145     bend_initresult *binitres;
2146     char *version;
2147     char options[140];
2148     statserv_options_block *cb = 0;  /* by default no control for backend */
2149
2150     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2151         cb = statserv_getcontrol();  /* got control block for backend */
2152
2153     if (cb && assoc->backend)
2154         (*cb->bend_close)(assoc->backend);
2155
2156     yaz_log(log_requestdetail, "Got initRequest");
2157     if (req->implementationId)
2158         yaz_log(log_requestdetail, "Id:        %s",
2159                 req->implementationId);
2160     if (req->implementationName)
2161         yaz_log(log_requestdetail, "Name:      %s",
2162                 req->implementationName);
2163     if (req->implementationVersion)
2164         yaz_log(log_requestdetail, "Version:   %s",
2165                 req->implementationVersion);
2166
2167     assoc_init_reset(assoc);
2168
2169     assoc->init->auth = req->idAuthentication;
2170     assoc->init->referenceId = req->referenceId;
2171
2172     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2173     {
2174         Z_CharSetandLanguageNegotiation *negotiation =
2175             yaz_get_charneg_record (req->otherInfo);
2176         if (negotiation &&
2177             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2178             assoc->init->charneg_request = negotiation;
2179     }
2180
2181     assoc->backend = 0;
2182     if (cb)
2183     {
2184         if (req->implementationVersion)
2185             yaz_log(log_requestdetail, "Config:    %s",
2186                     cb->configname);
2187
2188         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2189
2190         /* we have a backend control block, so call that init function */
2191         if (!(binitres = (*cb->bend_init)(assoc->init)))
2192         {
2193             yaz_log(YLOG_WARN, "Bad response from backend.");
2194             return 0;
2195         }
2196         assoc->backend = binitres->handle;
2197     }
2198     else
2199     {
2200         /* no backend. return error */
2201         binitres = odr_malloc(assoc->encode, sizeof(*binitres));
2202         binitres->errstring = 0;
2203         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2204         iochan_settimeout(assoc->client_chan, 10);
2205     }
2206     if ((assoc->init->bend_sort))
2207         yaz_log (YLOG_DEBUG, "Sort handler installed");
2208     if ((assoc->init->bend_search))
2209         yaz_log (YLOG_DEBUG, "Search handler installed");
2210     if ((assoc->init->bend_present))
2211         yaz_log (YLOG_DEBUG, "Present handler installed");
2212     if ((assoc->init->bend_esrequest))
2213         yaz_log (YLOG_DEBUG, "ESRequest handler installed");
2214     if ((assoc->init->bend_delete))
2215         yaz_log (YLOG_DEBUG, "Delete handler installed");
2216     if ((assoc->init->bend_scan))
2217         yaz_log (YLOG_DEBUG, "Scan handler installed");
2218     if ((assoc->init->bend_segment))
2219         yaz_log (YLOG_DEBUG, "Segment handler installed");
2220
2221     resp->referenceId = req->referenceId;
2222     *options = '\0';
2223     /* let's tell the client what we can do */
2224     if (ODR_MASK_GET(req->options, Z_Options_search))
2225     {
2226         ODR_MASK_SET(resp->options, Z_Options_search);
2227         strcat(options, "srch");
2228     }
2229     if (ODR_MASK_GET(req->options, Z_Options_present))
2230     {
2231         ODR_MASK_SET(resp->options, Z_Options_present);
2232         strcat(options, " prst");
2233     }
2234     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2235         assoc->init->bend_delete)
2236     {
2237         ODR_MASK_SET(resp->options, Z_Options_delSet);
2238         strcat(options, " del");
2239     }
2240     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2241         assoc->init->bend_esrequest)
2242     {
2243         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2244         strcat (options, " extendedServices");
2245     }
2246     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2247     {
2248         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2249         strcat(options, " namedresults");
2250     }
2251     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2252     {
2253         ODR_MASK_SET(resp->options, Z_Options_scan);
2254         strcat(options, " scan");
2255     }
2256     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2257     {
2258         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2259         strcat(options, " concurrop");
2260     }
2261     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2262     {
2263         ODR_MASK_SET(resp->options, Z_Options_sort);
2264         strcat(options, " sort");
2265     }
2266
2267     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
2268         && assoc->init->charneg_response)
2269     {
2270         Z_OtherInformation **p;
2271         Z_OtherInformationUnit *p0;
2272
2273         yaz_oi_APDU(apdu, &p);
2274
2275         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
2276             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2277
2278             p0->which = Z_OtherInfo_externallyDefinedInfo;
2279             p0->information.externallyDefinedInfo =
2280                 assoc->init->charneg_response;
2281         }
2282         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2283         strcat(options, " negotiation");
2284     }
2285
2286     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2287         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2288
2289     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2290     {
2291         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2292         assoc->version = 1; /* 1 & 2 are equivalent */
2293     }
2294     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2295     {
2296         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2297         assoc->version = 2;
2298     }
2299     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2300     {
2301         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2302         assoc->version = 3;
2303     }
2304
2305     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2306
2307     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2308         assoc->maximumRecordSize = *req->maximumRecordSize;
2309
2310     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2311         assoc->preferredMessageSize = *req->preferredMessageSize;
2312
2313     resp->preferredMessageSize = &assoc->preferredMessageSize;
2314     resp->maximumRecordSize = &assoc->maximumRecordSize;
2315
2316     resp->implementationId = odr_prepend(assoc->encode,
2317                 assoc->init->implementation_id,
2318                 resp->implementationId);
2319
2320     resp->implementationName = odr_prepend(assoc->encode,
2321                 assoc->init->implementation_name,
2322                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2323
2324     version = odr_strdup(assoc->encode, "$Revision: 1.100 $");
2325     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2326         version[strlen(version)-2] = '\0';
2327     resp->implementationVersion = odr_prepend(assoc->encode,
2328                 assoc->init->implementation_version,
2329                 odr_prepend(assoc->encode, &version[11],
2330                             resp->implementationVersion));
2331
2332     if (binitres->errcode)
2333     {
2334         assoc->state = ASSOC_DEAD;
2335         resp->userInformationField =
2336             init_diagnostics(assoc->encode, binitres->errcode,
2337                              binitres->errstring);
2338         *resp->result = 0;
2339     }
2340     if (log_request)
2341     {
2342         if (!req->idAuthentication)
2343             yaz_log(log_request, "Auth none");
2344         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2345         {
2346             const char *open = req->idAuthentication->u.open;
2347             const char *slash = strchr(open, '/');
2348             int len;
2349             if (slash)
2350                 len = slash - open;
2351             else
2352                 len = strlen(open);
2353                 yaz_log(log_request, "Auth open %.*s", len, open);
2354         }
2355         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2356         {
2357             const char *user = req->idAuthentication->u.idPass->userId;
2358             const char *group = req->idAuthentication->u.idPass->groupId;
2359             yaz_log(log_request, "Auth idPass %s %s",
2360                     user ? user : "-", group ? group : "-");
2361         }
2362         else if (req->idAuthentication->which
2363                  == Z_IdAuthentication_anonymous)
2364         {
2365             yaz_log(log_request, "Auth anonymous");
2366         }
2367         else
2368         {
2369             yaz_log(log_request, "Auth other");
2370         }
2371     }
2372     if (log_request)
2373     {
2374         WRBUF wr = wrbuf_alloc();
2375         wrbuf_printf(wr, "Init ");
2376         if (binitres->errcode)
2377             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2378         else
2379             wrbuf_printf(wr, "OK -");
2380         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2381                      (req->implementationId ? req->implementationId :"-"),
2382                      (req->implementationName ?
2383                       req->implementationName : "-"),
2384                      (req->implementationVersion ?
2385                       req->implementationVersion : "-")
2386             );
2387         yaz_log(log_request, "%s", wrbuf_buf(wr));
2388         wrbuf_free(wr, 1);
2389     }
2390     return apdu;
2391 }
2392
2393 /*
2394  * Set the specified `errcode' and `errstring' into a UserInfo-1
2395  * external to be returned to the client in accordance with Z35.90
2396  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2397  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2398  */
2399 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2400 {
2401     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2402         addinfo ? " -- " : "", addinfo ? addinfo : "");
2403     return zget_init_diagnostics(odr, error, addinfo);
2404 }
2405
2406 /*
2407  * nonsurrogate diagnostic record.
2408  */
2409 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2410 {
2411     Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec));
2412
2413     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2414             addinfo ? " -- " : "", addinfo ? addinfo : "");
2415
2416     rec->which = Z_Records_NSD;
2417     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2418                                                            error, addinfo);
2419     return rec;
2420 }
2421
2422 /*
2423  * surrogate diagnostic.
2424  */
2425 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2426                                           const char *dbname,
2427                                           int error, const char *addinfo)
2428 {
2429     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2430             addinfo ? " -- " : "", addinfo ? addinfo : "");
2431     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2432 }
2433
2434 static Z_Records *pack_records(association *a, char *setname, int start,
2435                                int *num, Z_RecordComposition *comp,
2436                                int *next, int *pres, oid_value format,
2437                                Z_ReferenceId *referenceId,
2438                                int *oid, int *errcode)
2439 {
2440     int recno, total_length = 0, toget = *num, dumped_records = 0;
2441     Z_Records *records =
2442         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
2443     Z_NamePlusRecordList *reclist =
2444         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
2445     Z_NamePlusRecord **list =
2446         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
2447
2448     records->which = Z_Records_DBOSD;
2449     records->u.databaseOrSurDiagnostics = reclist;
2450     reclist->num_records = 0;
2451     reclist->records = list;
2452     *pres = Z_PresentStatus_success;
2453     *num = 0;
2454     *next = 0;
2455
2456     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2457     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2458         a->maximumRecordSize);
2459     for (recno = start; reclist->num_records < toget; recno++)
2460     {
2461         bend_fetch_rr freq;
2462         Z_NamePlusRecord *thisrec;
2463         int this_length = 0;
2464         /*
2465          * we get the number of bytes allocated on the stream before any
2466          * allocation done by the backend - this should give us a reasonable
2467          * idea of the total size of the data so far.
2468          */
2469         total_length = odr_total(a->encode) - dumped_records;
2470         freq.errcode = 0;
2471         freq.errstring = 0;
2472         freq.basename = 0;
2473         freq.len = 0;
2474         freq.record = 0;
2475         freq.last_in_set = 0;
2476         freq.setname = setname;
2477         freq.surrogate_flag = 0;
2478         freq.number = recno;
2479         freq.comp = comp;
2480         freq.request_format = format;
2481         freq.request_format_raw = oid;
2482         freq.output_format = format;
2483         freq.output_format_raw = 0;
2484         freq.stream = a->encode;
2485         freq.print = a->print;
2486         freq.referenceId = referenceId;
2487         freq.schema = 0;
2488
2489         retrieve_fetch(a, &freq);
2490
2491         *next = freq.last_in_set ? 0 : recno + 1;
2492
2493         /* backend should be able to signal whether error is system-wide
2494            or only pertaining to current record */
2495         if (freq.errcode)
2496         {
2497             if (!freq.surrogate_flag)
2498             {
2499                 char s[20];
2500                 *pres = Z_PresentStatus_failure;
2501                 /* for 'present request out of range',
2502                    set addinfo to record position if not set */
2503                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2504                                 freq.errstring == 0)
2505                 {
2506                     sprintf (s, "%d", recno);
2507                     freq.errstring = s;
2508                 }
2509                 if (errcode)
2510                     *errcode = freq.errcode;
2511                 return diagrec(a, freq.errcode, freq.errstring);
2512             }
2513             reclist->records[reclist->num_records] =
2514                 surrogatediagrec(a, freq.basename, freq.errcode,
2515                                  freq.errstring);
2516             reclist->num_records++;
2517             continue;
2518         }
2519         if (freq.record == 0)  /* no error and no record ? */
2520         {
2521             *next = 0;   /* signal end-of-set and stop */
2522             break;
2523         }
2524         if (freq.len >= 0)
2525             this_length = freq.len;
2526         else
2527             this_length = odr_total(a->encode) - total_length - dumped_records;
2528         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2529             this_length, total_length, dumped_records);
2530         if (a->preferredMessageSize > 0 &&
2531                 this_length + total_length > a->preferredMessageSize)
2532         {
2533             /* record is small enough, really */
2534             if (this_length <= a->preferredMessageSize && recno > start)
2535             {
2536                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2537                 *pres = Z_PresentStatus_partial_2;
2538                 break;
2539             }
2540             /* record can only be fetched by itself */
2541             if (this_length < a->maximumRecordSize)
2542             {
2543                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2544                 if (toget > 1)
2545                 {
2546                     yaz_log(YLOG_DEBUG, "  Dropped it");
2547                     reclist->records[reclist->num_records] =
2548                          surrogatediagrec(a, freq.basename, 16, 0);
2549                     reclist->num_records++;
2550                     dumped_records += this_length;
2551                     continue;
2552                 }
2553             }
2554             else /* too big entirely */
2555             {
2556                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2557                         this_length, a->maximumRecordSize);
2558                 reclist->records[reclist->num_records] =
2559                     surrogatediagrec(a, freq.basename, 17, 0);
2560                 reclist->num_records++;
2561                 dumped_records += this_length;
2562                 continue;
2563             }
2564         }
2565
2566         if (!(thisrec = (Z_NamePlusRecord *)
2567               odr_malloc(a->encode, sizeof(*thisrec))))
2568             return 0;
2569         if (freq.basename)
2570             thisrec->databaseName = odr_strdup(a->encode, freq.basename);
2571         else
2572             thisrec->databaseName = 0;
2573         thisrec->which = Z_NamePlusRecord_databaseRecord;
2574
2575         if (freq.output_format_raw)
2576         {
2577             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
2578             freq.output_format = ident->value;
2579         }
2580         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
2581                                                  freq.record, freq.len);
2582         if (!thisrec->u.databaseRecord)
2583             return 0;
2584         reclist->records[reclist->num_records] = thisrec;
2585         reclist->num_records++;
2586     }
2587     *num = reclist->num_records;
2588     return records;
2589 }
2590
2591 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2592     int *fd)
2593 {
2594     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2595     bend_search_rr *bsrr =
2596         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
2597
2598     yaz_log(log_requestdetail, "Got SearchRequest.");
2599     bsrr->fd = fd;
2600     bsrr->request = reqb;
2601     bsrr->association = assoc;
2602     bsrr->referenceId = req->referenceId;
2603     save_referenceId (reqb, bsrr->referenceId);
2604     bsrr->srw_sortKeys = 0;
2605     bsrr->srw_setname = 0;
2606     bsrr->srw_setnameIdleTime = 0;
2607
2608     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2609     if (req->databaseNames)
2610     {
2611         int i;
2612         for (i = 0; i < req->num_databaseNames; i++)
2613             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2614     }
2615
2616     yaz_log_zquery_level(log_requestdetail,req->query);
2617
2618     if (assoc->init->bend_search)
2619     {
2620         bsrr->setname = req->resultSetName;
2621         bsrr->replace_set = *req->replaceIndicator;
2622         bsrr->num_bases = req->num_databaseNames;
2623         bsrr->basenames = req->databaseNames;
2624         bsrr->query = req->query;
2625         bsrr->stream = assoc->encode;
2626         nmem_transfer(bsrr->stream->mem, reqb->request_mem);
2627         bsrr->decode = assoc->decode;
2628         bsrr->print = assoc->print;
2629         bsrr->hits = 0;
2630         bsrr->errcode = 0;
2631         bsrr->errstring = NULL;
2632         bsrr->search_info = NULL;
2633
2634         if (assoc->server && assoc->server->cql_transform
2635             && req->query->which == Z_Query_type_104
2636             && req->query->u.type_104->which == Z_External_CQL)
2637         {
2638             /* have a CQL query and a CQL to PQF transform .. */
2639             int srw_errcode =
2640                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2641                         assoc->server->cql_transform, bsrr->query);
2642             if (srw_errcode)
2643                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2644         }
2645         if (!bsrr->errcode)
2646             (assoc->init->bend_search)(assoc->backend, bsrr);
2647         if (!bsrr->request)  /* backend not ready with the search response */
2648             return 0;  /* should not be used any more */
2649     }
2650     else
2651     {
2652         /* FIXME - make a diagnostic for it */
2653         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2654     }
2655     return response_searchRequest(assoc, reqb, bsrr, fd);
2656 }
2657
2658 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2659
2660 /*
2661  * Prepare a searchresponse based on the backend results. We probably want
2662  * to look at making the fetching of records nonblocking as well, but
2663  * so far, we'll keep things simple.
2664  * If bsrt is null, that means we're called in response to a communications
2665  * event, and we'll have to get the response for ourselves.
2666  */
2667 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2668     bend_search_rr *bsrt, int *fd)
2669 {
2670     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2671     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2672     Z_SearchResponse *resp = (Z_SearchResponse *)
2673         odr_malloc (assoc->encode, sizeof(*resp));
2674     int *nulint = odr_intdup (assoc->encode, 0);
2675     bool_t *sr = odr_intdup(assoc->encode, 1);
2676     int *next = odr_intdup(assoc->encode, 0);
2677     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2678     int returnedrecs=0;
2679
2680     apdu->which = Z_APDU_searchResponse;
2681     apdu->u.searchResponse = resp;
2682     resp->referenceId = req->referenceId;
2683     resp->additionalSearchInfo = 0;
2684     resp->otherInfo = 0;
2685     *fd = -1;
2686     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2687     {
2688         yaz_log(YLOG_FATAL, "Bad result from backend");
2689         return 0;
2690     }
2691     else if (bsrt->errcode)
2692     {
2693         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2694         resp->resultCount = nulint;
2695         resp->numberOfRecordsReturned = nulint;
2696         resp->nextResultSetPosition = nulint;
2697         resp->searchStatus = nulint;
2698         resp->resultSetStatus = none;
2699         resp->presentStatus = 0;
2700     }
2701     else
2702     {
2703         int *toget = odr_intdup(assoc->encode, 0);
2704         int *presst = odr_intdup(assoc->encode, 0);
2705         Z_RecordComposition comp, *compp = 0;
2706
2707         yaz_log (log_requestdetail, "resultCount: %d", bsrt->hits);
2708
2709         resp->records = 0;
2710         resp->resultCount = &bsrt->hits;
2711
2712         comp.which = Z_RecordComp_simple;
2713         /* how many records does the user agent want, then? */
2714         if (bsrt->hits <= *req->smallSetUpperBound)
2715         {
2716             *toget = bsrt->hits;
2717             if ((comp.u.simple = req->smallSetElementSetNames))
2718                 compp = &comp;
2719         }
2720         else if (bsrt->hits < *req->largeSetLowerBound)
2721         {
2722             *toget = *req->mediumSetPresentNumber;
2723             if (*toget > bsrt->hits)
2724                 *toget = bsrt->hits;
2725             if ((comp.u.simple = req->mediumSetElementSetNames))
2726                 compp = &comp;
2727         }
2728         else
2729             *toget = 0;
2730
2731         if (*toget && !resp->records)
2732         {
2733             oident *prefformat;
2734             oid_value form;
2735
2736             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2737                 form = VAL_NONE;
2738             else
2739                 form = prefformat->value;
2740
2741             /* Call bend_present if defined */
2742             if (assoc->init->bend_present)
2743             {
2744                 bend_present_rr *bprr = (bend_present_rr *)
2745                     nmem_malloc (reqb->request_mem, sizeof(*bprr));
2746                 bprr->setname = req->resultSetName;
2747                 bprr->start = 1;
2748                 bprr->number = *toget;
2749                 bprr->format = form;
2750                 bprr->comp = compp;
2751                 bprr->referenceId = req->referenceId;
2752                 bprr->stream = assoc->encode;
2753                 bprr->print = assoc->print;
2754                 bprr->request = reqb;
2755                 bprr->association = assoc;
2756                 bprr->errcode = 0;
2757                 bprr->errstring = NULL;
2758                 (*assoc->init->bend_present)(assoc->backend, bprr);
2759
2760                 if (!bprr->request)
2761                     return 0;
2762                 if (bprr->errcode)
2763                 {
2764                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2765                     *resp->presentStatus = Z_PresentStatus_failure;
2766                 }
2767             }
2768
2769             if (!resp->records)
2770                 resp->records = pack_records(assoc, req->resultSetName, 1,
2771                                              toget, compp, next, presst, form, req->referenceId,
2772                                              req->preferredRecordSyntax, NULL);
2773             if (!resp->records)
2774                 return 0;
2775             resp->numberOfRecordsReturned = toget;
2776             returnedrecs = *toget;
2777             resp->nextResultSetPosition = next;
2778             resp->searchStatus = sr;
2779             resp->resultSetStatus = 0;
2780             resp->presentStatus = presst;
2781         }
2782         else
2783         {
2784             if (*resp->resultCount)
2785                 *next = 1;
2786             resp->numberOfRecordsReturned = nulint;
2787             resp->nextResultSetPosition = next;
2788             resp->searchStatus = sr;
2789             resp->resultSetStatus = 0;
2790             resp->presentStatus = 0;
2791         }
2792     }
2793     resp->additionalSearchInfo = bsrt->search_info;
2794
2795     if (log_request)
2796     {
2797         int i;
2798         WRBUF wr = wrbuf_alloc();
2799
2800         for (i = 0 ; i < req->num_databaseNames; i++){
2801             if (i)
2802                 wrbuf_printf(wr, "+");
2803             wrbuf_printf(wr, req->databaseNames[i]);
2804         }
2805         wrbuf_printf(wr, " ");
2806
2807         if (bsrt->errcode)
2808             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2809         else
2810             wrbuf_printf(wr, "OK %d", bsrt->hits);
2811         wrbuf_printf(wr, " %s 1+%d ",
2812                      req->resultSetName, returnedrecs);
2813         yaz_query_to_wrbuf(wr, req->query);
2814
2815         yaz_log(log_request, "Search %s", wrbuf_buf(wr));
2816         wrbuf_free(wr, 1);
2817     }
2818     return apdu;
2819 }
2820
2821 /*
2822  * Maybe we got a little over-friendly when we designed bend_fetch to
2823  * get only one record at a time. Some backends can optimise multiple-record
2824  * fetches, and at any rate, there is some overhead involved in
2825  * all that selecting and hopping around. Problem is, of course, that the
2826  * frontend can't know ahead of time how many records it'll need to
2827  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2828  * is downright lousy as a bulk data transfer protocol.
2829  *
2830  * To start with, we'll do the fetching of records from the backend
2831  * in one operation: To save some trips in and out of the event-handler,
2832  * and to simplify the interface to pack_records. At any rate, asynch
2833  * operation is more fun in operations that have an unpredictable execution
2834  * speed - which is normally more true for search than for present.
2835  */
2836 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2837                                       int *fd)
2838 {
2839     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2840     oident *prefformat;
2841     oid_value form;
2842     Z_APDU *apdu;
2843     Z_PresentResponse *resp;
2844     int *next;
2845     int *num;
2846     int errcode = 0;
2847     const char *errstring = 0;
2848
2849     yaz_log(log_requestdetail, "Got PresentRequest.");
2850
2851     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2852         form = VAL_NONE;
2853     else
2854         form = prefformat->value;
2855     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2856     resp->records = 0;
2857     resp->presentStatus = odr_intdup(assoc->encode, 0);
2858     if (assoc->init->bend_present)
2859     {
2860         bend_present_rr *bprr = (bend_present_rr *)
2861             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2862         bprr->setname = req->resultSetId;
2863         bprr->start = *req->resultSetStartPoint;
2864         bprr->number = *req->numberOfRecordsRequested;
2865         bprr->format = form;
2866         bprr->comp = req->recordComposition;
2867         bprr->referenceId = req->referenceId;
2868         bprr->stream = assoc->encode;
2869         bprr->print = assoc->print;
2870         bprr->request = reqb;
2871         bprr->association = assoc;
2872         bprr->errcode = 0;
2873         bprr->errstring = NULL;
2874         (*assoc->init->bend_present)(assoc->backend, bprr);
2875
2876         if (!bprr->request)
2877             return 0; /* should not happen */
2878         if (bprr->errcode)
2879         {
2880             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2881             *resp->presentStatus = Z_PresentStatus_failure;
2882             errcode = bprr->errcode;
2883             errstring = bprr->errstring;
2884         }
2885     }
2886     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2887     next = odr_intdup(assoc->encode, 0);
2888     num = odr_intdup(assoc->encode, 0);
2889
2890     apdu->which = Z_APDU_presentResponse;
2891     apdu->u.presentResponse = resp;
2892     resp->referenceId = req->referenceId;
2893     resp->otherInfo = 0;
2894
2895     if (!resp->records)
2896     {
2897         *num = *req->numberOfRecordsRequested;
2898         resp->records =
2899             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2900                          num, req->recordComposition, next,
2901                          resp->presentStatus,
2902                          form, req->referenceId, req->preferredRecordSyntax,
2903                          &errcode);
2904     }
2905     if (log_request)
2906     {
2907         WRBUF wr = wrbuf_alloc();
2908         wrbuf_printf(wr, "Present ");
2909
2910         if (*resp->presentStatus == Z_PresentStatus_failure)
2911             wrbuf_printf(wr, "ERROR %d ", errcode);
2912         else if (*resp->presentStatus == Z_PresentStatus_success)
2913             wrbuf_printf(wr, "OK -  ");
2914         else
2915             wrbuf_printf(wr, "Partial %d - ", *resp->presentStatus);
2916
2917         wrbuf_printf(wr, " %s %d+%d ",
2918                 req->resultSetId, *req->resultSetStartPoint,
2919                 *req->numberOfRecordsRequested);
2920         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2921         wrbuf_free(wr, 1);
2922     }
2923     if (!resp->records)
2924         return 0;
2925     resp->numberOfRecordsReturned = num;
2926     resp->nextResultSetPosition = next;
2927
2928     return apdu;
2929 }
2930
2931 /*
2932  * Scan was implemented rather in a hurry, and with support for only the basic
2933  * elements of the service in the backend API. Suggestions are welcome.
2934  */
2935 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2936 {
2937     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2938     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2939     Z_ScanResponse *res = (Z_ScanResponse *)
2940         odr_malloc (assoc->encode, sizeof(*res));
2941     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2942     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2943     Z_ListEntries *ents = (Z_ListEntries *)
2944         odr_malloc (assoc->encode, sizeof(*ents));
2945     Z_DiagRecs *diagrecs_p = NULL;
2946     oident *attset;
2947     bend_scan_rr *bsrr = (bend_scan_rr *)
2948         odr_malloc (assoc->encode, sizeof(*bsrr));
2949     struct scan_entry *save_entries;
2950
2951     yaz_log(log_requestdetail, "Got ScanRequest");
2952
2953     apdu->which = Z_APDU_scanResponse;
2954     apdu->u.scanResponse = res;
2955     res->referenceId = req->referenceId;
2956
2957     /* if step is absent, set it to 0 */
2958     res->stepSize = odr_intdup(assoc->encode, 0);
2959     if (req->stepSize)
2960         *res->stepSize = *req->stepSize;
2961
2962     res->scanStatus = scanStatus;
2963     res->numberOfEntriesReturned = numberOfEntriesReturned;
2964     res->positionOfTerm = 0;
2965     res->entries = ents;
2966     ents->num_entries = 0;
2967     ents->entries = NULL;
2968     ents->num_nonsurrogateDiagnostics = 0;
2969     ents->nonsurrogateDiagnostics = NULL;
2970     res->attributeSet = 0;
2971     res->otherInfo = 0;
2972
2973     if (req->databaseNames)
2974     {
2975         int i;
2976         for (i = 0; i < req->num_databaseNames; i++)
2977             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2978     }
2979     bsrr->scanClause = 0;
2980     bsrr->errcode = 0;
2981     bsrr->errstring = 0;
2982     bsrr->num_bases = req->num_databaseNames;
2983     bsrr->basenames = req->databaseNames;
2984     bsrr->num_entries = *req->numberOfTermsRequested;
2985     bsrr->term = req->termListAndStartPoint;
2986     bsrr->referenceId = req->referenceId;
2987     bsrr->stream = assoc->encode;
2988     bsrr->print = assoc->print;
2989     bsrr->step_size = res->stepSize;
2990     bsrr->entries = 0;
2991     /* For YAZ 2.0 and earlier it was the backend handler that
2992        initialized entries (member display_term did not exist)
2993        YAZ 2.0 and later sets 'entries'  and initialize all members
2994        including 'display_term'. If YAZ 2.0 or later sees that
2995        entries was modified - we assume that it is an old handler and
2996        that 'display_term' is _not_ set.
2997     */
2998     if (bsrr->num_entries > 0)
2999     {
3000         int i;
3001         bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3002                                    bsrr->num_entries);
3003         for (i = 0; i<bsrr->num_entries; i++)
3004         {
3005             bsrr->entries[i].term = 0;
3006             bsrr->entries[i].occurrences = 0;
3007             bsrr->entries[i].errcode = 0;
3008             bsrr->entries[i].errstring = 0;
3009             bsrr->entries[i].display_term = 0;
3010         }
3011     }
3012     save_entries = bsrr->entries;  /* save it so we can compare later */
3013
3014     if (req->attributeSet &&
3015         (attset = oid_getentbyoid(req->attributeSet)) &&
3016         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
3017         bsrr->attributeset = attset->value;
3018     else
3019         bsrr->attributeset = VAL_NONE;
3020     log_scan_term_level (log_requestdetail, req->termListAndStartPoint,
3021             bsrr->attributeset);
3022     bsrr->term_position = req->preferredPositionInResponse ?
3023         *req->preferredPositionInResponse : 1;
3024
3025     ((int (*)(void *, bend_scan_rr *))
3026      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3027
3028     if (bsrr->errcode)
3029         diagrecs_p = zget_DiagRecs(assoc->encode,
3030                                    bsrr->errcode, bsrr->errstring);
3031     else
3032     {
3033         int i;
3034         Z_Entry **tab = (Z_Entry **)
3035             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
3036
3037         if (bsrr->status == BEND_SCAN_PARTIAL)
3038             *scanStatus = Z_Scan_partial_5;
3039         else
3040             *scanStatus = Z_Scan_success;
3041         ents->entries = tab;
3042         ents->num_entries = bsrr->num_entries;
3043         res->numberOfEntriesReturned = &ents->num_entries;
3044         res->positionOfTerm = &bsrr->term_position;
3045         for (i = 0; i < bsrr->num_entries; i++)
3046         {
3047             Z_Entry *e;
3048             Z_TermInfo *t;
3049             Odr_oct *o;
3050
3051             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3052             if (bsrr->entries[i].occurrences >= 0)
3053             {
3054                 e->which = Z_Entry_termInfo;
3055                 e->u.termInfo = t = (Z_TermInfo *)
3056                     odr_malloc(assoc->encode, sizeof(*t));
3057                 t->suggestedAttributes = 0;
3058                 t->displayTerm = 0;
3059                 if (save_entries == bsrr->entries &&
3060                     bsrr->entries[i].display_term)
3061                 {
3062                     /* the entries was _not_ set by the handler. So it's
3063                        safe to test for new member display_term. It is
3064                        NULL'ed by us.
3065                     */
3066                     t->displayTerm = odr_strdup(assoc->encode,
3067                                                 bsrr->entries[i].display_term);
3068                 }
3069                 t->alternativeTerm = 0;
3070                 t->byAttributes = 0;
3071                 t->otherTermInfo = 0;
3072                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3073                 t->term = (Z_Term *)
3074                     odr_malloc(assoc->encode, sizeof(*t->term));
3075                 t->term->which = Z_Term_general;
3076                 t->term->u.general = o =
3077                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3078                 o->buf = (unsigned char *)
3079                     odr_malloc(assoc->encode, o->len = o->size =
3080                                strlen(bsrr->entries[i].term));
3081                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3082                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3083                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3084             }
3085             else
3086             {
3087                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3088                                                   bsrr->entries[i].errcode,
3089                                                   bsrr->entries[i].errstring);
3090                 assert (drecs->num_diagRecs == 1);
3091                 e->which = Z_Entry_surrogateDiagnostic;
3092                 assert (drecs->diagRecs[0]);
3093                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3094             }
3095         }
3096     }
3097     if (diagrecs_p)
3098     {
3099         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3100         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3101     }
3102     if (log_request)
3103     {
3104         int i;
3105         WRBUF wr = wrbuf_alloc();
3106         wrbuf_printf(wr, "Scan ");
3107         for (i = 0 ; i < req->num_databaseNames; i++){
3108             if (i)
3109                 wrbuf_printf(wr, "+");
3110             wrbuf_printf(wr, req->databaseNames[i]);
3111         }
3112         wrbuf_printf(wr, " ");
3113
3114         if (bsrr->errcode){
3115             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3116             wrbuf_printf(wr, " ");
3117         }
3118         else
3119             wrbuf_printf(wr, "OK ");
3120         /* else if (*res->scanStatus == Z_Scan_success) */
3121         /*    wrbuf_printf(wr, "OK "); */
3122         /* else */
3123         /* wrbuf_printf(wr, "Partial "); */
3124
3125         if (*res->numberOfEntriesReturned)
3126             wrbuf_printf(wr, "%d - ", *res->numberOfEntriesReturned);
3127         else
3128             wrbuf_printf(wr, "0 - ");
3129
3130         wrbuf_printf(wr, "%d+%d+%d ",
3131                      (req->preferredPositionInResponse ?
3132                       *req->preferredPositionInResponse : 1),
3133                      *req->numberOfTermsRequested,
3134                      (res->stepSize ? *res->stepSize : 1));
3135
3136         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3137                           bsrr->attributeset);
3138         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3139         wrbuf_free(wr, 1);
3140     }
3141     return apdu;
3142 }
3143
3144 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3145     int *fd)
3146 {
3147     int i;
3148     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3149     Z_SortResponse *res = (Z_SortResponse *)
3150         odr_malloc (assoc->encode, sizeof(*res));
3151     bend_sort_rr *bsrr = (bend_sort_rr *)
3152         odr_malloc (assoc->encode, sizeof(*bsrr));
3153
3154     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3155
3156     yaz_log(log_requestdetail, "Got SortRequest.");
3157
3158     bsrr->num_input_setnames = req->num_inputResultSetNames;
3159     for (i=0;i<req->num_inputResultSetNames;i++)
3160         yaz_log(log_requestdetail, "Input resultset: '%s'",
3161                 req->inputResultSetNames[i]);
3162     bsrr->input_setnames = req->inputResultSetNames;
3163     bsrr->referenceId = req->referenceId;
3164     bsrr->output_setname = req->sortedResultSetName;
3165     yaz_log(log_requestdetail, "Output resultset: '%s'",
3166                 req->sortedResultSetName);
3167     bsrr->sort_sequence = req->sortSequence;
3168        /*FIXME - dump those sequences too */
3169     bsrr->stream = assoc->encode;
3170     bsrr->print = assoc->print;
3171
3172     bsrr->sort_status = Z_SortResponse_failure;
3173     bsrr->errcode = 0;
3174     bsrr->errstring = 0;
3175
3176     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3177
3178     res->referenceId = bsrr->referenceId;
3179     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3180     res->resultSetStatus = 0;
3181     if (bsrr->errcode)
3182     {
3183         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3184                                        bsrr->errcode, bsrr->errstring);
3185         res->diagnostics = dr->diagRecs;
3186         res->num_diagnostics = dr->num_diagRecs;
3187     }
3188     else
3189     {
3190         res->num_diagnostics = 0;
3191         res->diagnostics = 0;
3192     }
3193     res->resultCount = 0;
3194     res->otherInfo = 0;
3195
3196     apdu->which = Z_APDU_sortResponse;
3197     apdu->u.sortResponse = res;
3198     if (log_request)
3199     {
3200         WRBUF wr = wrbuf_alloc();
3201         wrbuf_printf(wr, "Sort ");
3202         if (bsrr->errcode)
3203             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3204         else
3205             wrbuf_printf(wr,  "OK -");
3206         wrbuf_printf(wr, " (");
3207         for (i = 0; i<req->num_inputResultSetNames; i++)
3208         {
3209             if (i)
3210                 wrbuf_printf(wr, "+");
3211             wrbuf_printf(wr, req->inputResultSetNames[i]);
3212         }
3213         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3214
3215         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3216         wrbuf_free(wr, 1);
3217     }
3218     return apdu;
3219 }
3220
3221 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3222     int *fd)
3223 {
3224     int i;
3225     Z_DeleteResultSetRequest *req =
3226         reqb->apdu_request->u.deleteResultSetRequest;
3227     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3228         odr_malloc (assoc->encode, sizeof(*res));
3229     bend_delete_rr *bdrr = (bend_delete_rr *)
3230         odr_malloc (assoc->encode, sizeof(*bdrr));
3231     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3232
3233     yaz_log(log_requestdetail, "Got DeleteRequest.");
3234
3235     bdrr->num_setnames = req->num_resultSetList;
3236     bdrr->setnames = req->resultSetList;
3237     for (i = 0; i<req->num_resultSetList; i++)
3238         yaz_log(log_requestdetail, "resultset: '%s'",
3239                 req->resultSetList[i]);
3240     bdrr->stream = assoc->encode;
3241     bdrr->print = assoc->print;
3242     bdrr->function = *req->deleteFunction;
3243     bdrr->referenceId = req->referenceId;
3244     bdrr->statuses = 0;
3245     if (bdrr->num_setnames > 0)
3246     {
3247         bdrr->statuses = (int*)
3248             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3249                        bdrr->num_setnames);
3250         for (i = 0; i < bdrr->num_setnames; i++)
3251             bdrr->statuses[i] = 0;
3252     }
3253     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3254
3255     res->referenceId = req->referenceId;
3256
3257     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3258
3259     res->deleteListStatuses = 0;
3260     if (bdrr->num_setnames > 0)
3261     {
3262         int i;
3263         res->deleteListStatuses = (Z_ListStatuses *)
3264             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3265         res->deleteListStatuses->num = bdrr->num_setnames;
3266         res->deleteListStatuses->elements =
3267             (Z_ListStatus **)
3268             odr_malloc (assoc->encode,
3269                         sizeof(*res->deleteListStatuses->elements) *
3270                         bdrr->num_setnames);
3271         for (i = 0; i<bdrr->num_setnames; i++)
3272         {
3273             res->deleteListStatuses->elements[i] =
3274                 (Z_ListStatus *)
3275                 odr_malloc (assoc->encode,
3276                             sizeof(**res->deleteListStatuses->elements));
3277             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3278             res->deleteListStatuses->elements[i]->id =
3279                 odr_strdup (assoc->encode, bdrr->setnames[i]);
3280         }
3281     }
3282     res->numberNotDeleted = 0;
3283     res->bulkStatuses = 0;
3284     res->deleteMessage = 0;
3285     res->otherInfo = 0;
3286
3287     apdu->which = Z_APDU_deleteResultSetResponse;
3288     apdu->u.deleteResultSetResponse = res;
3289     if (log_request)
3290     {
3291         WRBUF wr = wrbuf_alloc();
3292         wrbuf_printf(wr, "Delete ");
3293         if (bdrr->delete_status)
3294             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3295         else
3296             wrbuf_printf(wr, "OK -");
3297         for (i = 0; i<req->num_resultSetList; i++)
3298             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3299         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3300         wrbuf_free(wr, 1);
3301     }
3302     return apdu;
3303 }
3304
3305 static void process_close(association *assoc, request *reqb)
3306 {
3307     Z_Close *req = reqb->apdu_request->u.close;
3308     static char *reasons[] =
3309     {
3310         "finished",
3311         "shutdown",
3312         "systemProblem",
3313         "costLimit",
3314         "resources",
3315         "securityViolation",
3316         "protocolError",
3317         "lackOfActivity",
3318         "peerAbort",
3319         "unspecified"
3320     };
3321
3322     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3323         reasons[*req->closeReason], req->diagnosticInformation ?
3324         req->diagnosticInformation : "NULL");
3325     if (assoc->version < 3) /* to make do_force respond with close */
3326         assoc->version = 3;
3327     do_close_req(assoc, Z_Close_finished,
3328                  "Association terminated by client", reqb);
3329     yaz_log(log_request,"Close OK");
3330 }
3331
3332 void save_referenceId (request *reqb, Z_ReferenceId *refid)
3333 {
3334     if (refid)
3335     {
3336         reqb->len_refid = refid->len;
3337         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
3338         memcpy (reqb->refid, refid->buf, refid->len);
3339     }
3340     else
3341     {
3342         reqb->len_refid = 0;
3343         reqb->refid = NULL;
3344     }
3345 }
3346
3347 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
3348 {
3349     process_z_response (a, req, res);
3350 }
3351
3352 bend_request bend_request_mk (bend_association a)
3353 {
3354     request *nreq = request_get (&a->outgoing);
3355     nreq->request_mem = nmem_create ();
3356     return nreq;
3357 }
3358
3359 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
3360 {
3361     Z_ReferenceId *id;
3362     if (!req->refid)
3363         return 0;
3364     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
3365     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
3366     id->len = id->size = req->len_refid;
3367     memcpy (id->buf, req->refid, req->len_refid);
3368     return id;
3369 }
3370
3371 void bend_request_destroy (bend_request *req)
3372 {
3373     nmem_destroy((*req)->request_mem);
3374     request_release(*req);
3375     *req = NULL;
3376 }
3377
3378 int bend_backend_respond (bend_association a, bend_request req)
3379 {
3380     char *msg;
3381     int r;
3382     r = process_z_request (a, req, &msg);
3383     if (r < 0)
3384         yaz_log (YLOG_WARN, "%s", msg);
3385     return r;
3386 }
3387
3388 void bend_request_setdata(bend_request r, void *p)
3389 {
3390     r->clientData = p;
3391 }
3392
3393 void *bend_request_getdata(bend_request r)
3394 {
3395     return r->clientData;
3396 }
3397
3398 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
3399 {
3400     bend_segment_rr req;
3401
3402     req.segment = reqb->apdu_request->u.segmentRequest;
3403     req.stream = assoc->encode;
3404     req.decode = assoc->decode;
3405     req.print = assoc->print;
3406     req.association = assoc;
3407
3408     (*assoc->init->bend_segment)(assoc->backend, &req);
3409
3410     return 0;
3411 }
3412
3413 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3414 {
3415     bend_esrequest_rr esrequest;
3416     const char *ext_name = "unknown";
3417
3418     Z_ExtendedServicesRequest *req =
3419         reqb->apdu_request->u.extendedServicesRequest;
3420     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3421
3422     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3423
3424     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3425     esrequest.stream = assoc->encode;
3426     esrequest.decode = assoc->decode;
3427     esrequest.print = assoc->print;
3428     esrequest.errcode = 0;
3429     esrequest.errstring = NULL;
3430     esrequest.request = reqb;
3431     esrequest.association = assoc;
3432     esrequest.taskPackage = 0;
3433     esrequest.referenceId = req->referenceId;
3434
3435
3436     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3437     {
3438         switch(esrequest.esr->taskSpecificParameters->which)
3439         {
3440         case Z_External_itemOrder:
3441             ext_name = "ItemOrder"; break;
3442         case Z_External_update:
3443             ext_name = "Update"; break;
3444         case Z_External_update0:
3445             ext_name = "Update0"; break;
3446         case Z_External_ESAdmin:
3447             ext_name = "Admin"; break;
3448
3449         }
3450     }
3451
3452     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3453
3454     /* If the response is being delayed, return NULL */
3455     if (esrequest.request == NULL)
3456         return(NULL);
3457
3458     resp->referenceId = req->referenceId;
3459
3460     if (esrequest.errcode == -1)
3461     {
3462         /* Backend service indicates request will be processed */
3463         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3464         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3465     }
3466     else if (esrequest.errcode == 0)
3467     {
3468         /* Backend service indicates request will be processed */
3469         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3470         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3471     }
3472     else
3473     {
3474         Z_DiagRecs *diagRecs =
3475             zget_DiagRecs(assoc->encode, esrequest.errcode,
3476                           esrequest.errstring);
3477         /* Backend indicates error, request will not be processed */
3478         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3479         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3480         resp->num_diagnostics = diagRecs->num_diagRecs;
3481         resp->diagnostics = diagRecs->diagRecs;
3482         if (log_request)
3483         {
3484             WRBUF wr = wrbuf_alloc();
3485             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3486             yaz_log(log_request, "EsRequest %s", wrbuf_buf(wr) );
3487             wrbuf_free(wr, 1);
3488         }
3489
3490     }
3491     /* Do something with the members of bend_extendedservice */
3492     if (esrequest.taskPackage)
3493         resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED,
3494                                          (const char *)  esrequest.taskPackage,
3495                                           -1);
3496     yaz_log(YLOG_DEBUG,"Send the result apdu");
3497     return apdu;
3498 }
3499
3500 /*
3501  * Local variables:
3502  * c-basic-offset: 4
3503  * indent-tabs-mode: nil
3504  * End:
3505  * vim: shiftwidth=4 tabstop=8 expandtab
3506  */
3507