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 1.89 2006-07-06 14:16:00 marc 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;
 106 static int log_request = 0; /* one-line logs for requests */
 107 static int log_requestdetail = 0;  /* more detailed stuff */
 108
 109 /** get_logbits sets global loglevel bits */
 110 static void get_logbits()
 111 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 112     if (!logbits_set)
 113     {
 114         logbits_set = 1;
 115         log_session = yaz_log_module_level("session");
 116         log_request = yaz_log_module_level("request");
 117         log_requestdetail = yaz_log_module_level("requestdetail");
 118     }
 119 }
 120
 121 static void wr_diag(WRBUF w, int error, const char *addinfo)
 122 {
 123     wrbuf_printf(w, "ERROR [%d] %s%s%s",
 124                  error, diagbib1_str(error),
 125                  addinfo ? "--" : "", addinfo ? addinfo : "");
 126 }
 127
 128
 129 /*
 130  * Create and initialize a new association-handle.
 131  *  channel  : iochannel for the current line.
 132  *  link     : communications channel.
 133  * Returns: 0 or a new association handle.
 134  */
 135 association *create_association(IOCHAN channel, COMSTACK link,
 136                                 const char *apdufile)
 137 {
 138     association *anew;
 139
 140     if (!logbits_set)
 141         get_logbits();
 142     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 143         return 0;
 144     anew->init = 0;
 145     anew->version = 0;
 146     anew->last_control = 0;
 147     anew->client_chan = channel;
 148     anew->client_link = link;
 149     anew->cs_get_mask = 0;
 150     anew->cs_put_mask = 0;
 151     anew->cs_accept_mask = 0;
 152     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 153         !(anew->encode = odr_createmem(ODR_ENCODE)))
 154         return 0;
 155     if (apdufile && *apdufile)
 156     {
 157         FILE *f;
 158
 159         if (!(anew->print = odr_createmem(ODR_PRINT)))
 160             return 0;
 161         if (*apdufile == '@')
 162         {
 163             odr_setprint(anew->print, yaz_log_file());
 164         }
 165         else if (*apdufile != '-')
 166         {
 167             char filename[256];
 168             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 169             if (!(f = fopen(filename, "w")))
 170             {
 171                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 172                 return 0;
 173             }
 174             setvbuf(f, 0, _IONBF, 0);
 175             odr_setprint(anew->print, f);
 176         }
 177     }
 178     else
 179         anew->print = 0;
 180     anew->input_buffer = 0;
 181     anew->input_buffer_len = 0;
 182     anew->backend = 0;
 183     anew->state = ASSOC_NEW;
 184     request_initq(&anew->incoming);
 185     request_initq(&anew->outgoing);
 186     anew->proto = cs_getproto(link);
 187     anew->server = 0;
 188     return anew;
 189 }
 190
 191 /*
 192  * Free association and release resources.
 193  */
 194 void destroy_association(association *h)
 195 {
 196     statserv_options_block *cb = statserv_getcontrol();
 197     request *req;
 198
 199     xfree(h->init);
 200     odr_destroy(h->decode);
 201     odr_destroy(h->encode);
 202     if (h->print)
 203         odr_destroy(h->print);
 204     if (h->input_buffer)
 205     xfree(h->input_buffer);
 206     if (h->backend)
 207         (*cb->bend_close)(h->backend);
 208     while ((req = request_deq(&h->incoming)))
 209         request_release(req);
 210     while ((req = request_deq(&h->outgoing)))
 211         request_release(req);
 212     request_delq(&h->incoming);
 213     request_delq(&h->outgoing);
 214     xfree(h);
 215     xmalloc_trav("session closed");
 216     if (cb && cb->one_shot)
 217     {
 218         exit (0);
 219     }
 220 }
 221
 222 static void do_close_req(association *a, int reason, char *message,
 223                          request *req)
 224 {
 225     Z_APDU apdu;
 226     Z_Close *cls = zget_Close(a->encode);
 227
 228     /* Purge request queue */
 229     while (request_deq(&a->incoming));
 230     while (request_deq(&a->outgoing));
 231     if (a->version >= 3)
 232     {
 233         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 234             reason, message ? message : "none");
 235         apdu.which = Z_APDU_close;
 236         apdu.u.close = cls;
 237         *cls->closeReason = reason;
 238         cls->diagnosticInformation = message;
 239         process_z_response(a, req, &apdu);
 240         iochan_settimeout(a->client_chan, 20);
 241     }
 242     else
 243     {
 244         request_release(req);
 245         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 246         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 247         a->cs_put_mask = 0;
 248     }
 249     a->state = ASSOC_DEAD;
 250 }
 251
 252 static void do_close(association *a, int reason, char *message)
 253 {
 254     request *req = request_get(&a->outgoing);
 255     do_close_req (a, reason, message, req);
 256 }
 257
 258 /*
 259  * This is where PDUs from the client are read and the further
 260  * processing is initiated. Flow of control moves down through the
 261  * various process_* functions below, until the encoded result comes back up
 262  * to the output handler in here.
 263  *
 264  *  h     : the I/O channel that has an outstanding event.
 265  *  event : the current outstanding event.
 266  */
 267 void ir_session(IOCHAN h, int event)
 268 {
 269     int res;
 270     association *assoc = (association *)iochan_getdata(h);
 271     COMSTACK conn = assoc->client_link;
 272     request *req;
 273
 274     assert(h && conn && assoc);
 275     if (event == EVENT_TIMEOUT)
 276     {
 277         if (assoc->state != ASSOC_UP)
 278         {
 279             yaz_log(YLOG_DEBUG, "Final timeout - closing connection.");
 280             /* do we need to lod this at all */
 281             cs_close(conn);
 282             destroy_association(assoc);
 283             iochan_destroy(h);
 284         }
 285         else
 286         {
 287             yaz_log(log_session, "Session idle too long. Sending close.");
 288             do_close(assoc, Z_Close_lackOfActivity, 0);
 289         }
 290         return;
 291     }
 292     if (event & assoc->cs_accept_mask)
 293     {
 294         if (!cs_accept (conn))
 295         {
 296             yaz_log (YLOG_WARN, "accept failed");
 297             destroy_association(assoc);
 298             iochan_destroy(h);
 299         }
 300         iochan_clearflag (h, EVENT_OUTPUT);
 301         if (conn->io_pending)
 302         {   /* cs_accept didn't complete */
 303             assoc->cs_accept_mask =
 304                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 305                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 306
 307             iochan_setflag (h, assoc->cs_accept_mask);
 308         }
 309         else
 310         {   /* cs_accept completed. Prepare for reading (cs_get) */
 311             assoc->cs_accept_mask = 0;
 312             assoc->cs_get_mask = EVENT_INPUT;
 313             iochan_setflag (h, assoc->cs_get_mask);
 314         }
 315         return;
 316     }
 317     if ((event & assoc->cs_get_mask) || (event & EVENT_WORK)) /* input */
 318     {
 319         if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 320         {
 321             yaz_log(YLOG_DEBUG, "ir_session (input)");
 322             /* We aren't speaking to this fellow */
 323             if (assoc->state == ASSOC_DEAD)
 324             {
 325                 yaz_log(log_session, "Connection closed - end of session");
 326                 cs_close(conn);
 327                 destroy_association(assoc);
 328                 iochan_destroy(h);
 329                 return;
 330             }
 331             assoc->cs_get_mask = EVENT_INPUT;
 332             if ((res = cs_get(conn, &assoc->input_buffer,
 333                 &assoc->input_buffer_len)) <= 0)
 334             {
 335                 yaz_log(log_session, "Connection closed by client");
 336                 cs_close(conn);
 337                 destroy_association(assoc);
 338                 iochan_destroy(h);
 339                 return;
 340             }
 341             else if (res == 1) /* incomplete read - wait for more  */
 342             {
 343                 if (conn->io_pending & CS_WANT_WRITE)
 344                     assoc->cs_get_mask |= EVENT_OUTPUT;
 345                 iochan_setflag(h, assoc->cs_get_mask);
 346                 return;
 347             }
 348             if (cs_more(conn)) /* more stuff - call us again later, please */
 349                 iochan_setevent(h, EVENT_INPUT);
 350
 351             /* we got a complete PDU. Let's decode it */
 352             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 353                             assoc->input_buffer[0] & 0xff,
 354                             assoc->input_buffer[1] & 0xff,
 355                             assoc->input_buffer[2] & 0xff);
 356             req = request_get(&assoc->incoming); /* get a new request */
 357             odr_reset(assoc->decode);
 358             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 359             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 360             {
 361                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 362                         "[near byte %ld] ",
 363                         odr_errmsg(odr_geterror(assoc->decode)),
 364                         odr_getelement(assoc->decode),
 365                         (long) odr_offset(assoc->decode));
 366                 if (assoc->decode->error != OHTTP)
 367                 {
 368                     yaz_log(YLOG_WARN, "PDU dump:");
 369                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 370                     request_release(req);
 371                     do_close(assoc, Z_Close_protocolError,"Malformed package");
 372                 }
 373                 else
 374                 {
 375                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 376                     assoc->state = ASSOC_DEAD;
 377                     process_gdu_response(assoc, req, p);
 378                 }
 379                 return;
 380             }
 381             req->request_mem = odr_extract_mem(assoc->decode);
 382             if (assoc->print)
 383             {
 384                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 385                     yaz_log(YLOG_WARN, "ODR print error: %s",
 386                        odr_errmsg(odr_geterror(assoc->print)));
 387                 odr_reset(assoc->print);
 388             }
 389             request_enq(&assoc->incoming, req);
 390         }
 391
 392         /* can we do something yet? */
 393         req = request_head(&assoc->incoming);
 394         if (req->state == REQUEST_IDLE)
 395         {
 396             request_deq(&assoc->incoming);
 397             process_gdu_request(assoc, req);
 398         }
 399     }
 400     if (event & assoc->cs_put_mask)
 401     {
 402         request *req = request_head(&assoc->outgoing);
 403
 404         assoc->cs_put_mask = 0;
 405         yaz_log(YLOG_DEBUG, "ir_session (output)");
 406         req->state = REQUEST_PENDING;
 407         switch (res = cs_put(conn, req->response, req->len_response))
 408         {
 409         case -1:
 410             yaz_log(log_session, "Connection closed by client");
 411             cs_close(conn);
 412             destroy_association(assoc);
 413             iochan_destroy(h);
 414             break;
 415         case 0: /* all sent - release the request structure */
 416             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 417 #if 0
 418             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 419                     req->response);
 420 #endif
 421             nmem_destroy(req->request_mem);
 422             request_deq(&assoc->outgoing);
 423             request_release(req);
 424             if (!request_head(&assoc->outgoing))
 425             {   /* restore mask for cs_get operation ... */
 426                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 427                 iochan_setflag(h, assoc->cs_get_mask);
 428                 if (assoc->state == ASSOC_DEAD)
 429                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 430             }
 431             else
 432             {
 433                 assoc->cs_put_mask = EVENT_OUTPUT;
 434             }
 435             break;
 436         default:
 437             if (conn->io_pending & CS_WANT_WRITE)
 438                 assoc->cs_put_mask |= EVENT_OUTPUT;
 439             if (conn->io_pending & CS_WANT_READ)
 440                 assoc->cs_put_mask |= EVENT_INPUT;
 441             iochan_setflag(h, assoc->cs_put_mask);
 442         }
 443     }
 444     if (event & EVENT_EXCEPT)
 445     {
 446         yaz_log(YLOG_WARN, "ir_session (exception)");
 447         cs_close(conn);
 448         destroy_association(assoc);
 449         iochan_destroy(h);
 450     }
 451 }
 452
 453 static int process_z_request(association *assoc, request *req, char **msg);
 454
 455
 456 static void assoc_init_reset(association *assoc)
 457 {
 458     xfree (assoc->init);
 459     assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init));
 460
 461     assoc->init->stream = assoc->encode;
 462     assoc->init->print = assoc->print;
 463     assoc->init->auth = 0;
 464     assoc->init->referenceId = 0;
 465     assoc->init->implementation_version = 0;
 466     assoc->init->implementation_id = 0;
 467     assoc->init->implementation_name = 0;
 468     assoc->init->bend_sort = NULL;
 469     assoc->init->bend_search = NULL;
 470     assoc->init->bend_present = NULL;
 471     assoc->init->bend_esrequest = NULL;
 472     assoc->init->bend_delete = NULL;
 473     assoc->init->bend_scan = NULL;
 474     assoc->init->bend_segment = NULL;
 475     assoc->init->bend_fetch = NULL;
 476     assoc->init->bend_explain = NULL;
 477     assoc->init->bend_srw_scan = NULL;
 478     assoc->init->bend_srw_update = NULL;
 479
 480     assoc->init->charneg_request = NULL;
 481     assoc->init->charneg_response = NULL;
 482
 483     assoc->init->decode = assoc->decode;
 484     assoc->init->peer_name =
 485         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
 486
 487     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 488 }
 489
 490 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 491 {
 492     statserv_options_block *cb = statserv_getcontrol();
 493     if (!assoc->init)
 494     {
 495         const char *encoding = "UTF-8";
 496         Z_External *ce;
 497         bend_initresult *binitres;
 498
 499         yaz_log(YLOG_LOG, "srw_bend_init config=%s", cb->configname);
 500         assoc_init_reset(assoc);
 501
 502         assoc->maximumRecordSize = 3000000;
 503         assoc->preferredMessageSize = 3000000;
 504
 505         if (sr->username)
 506         {
 507             Z_IdAuthentication *auth = odr_malloc(assoc->decode, sizeof(*auth));
 508             int len;
 509
 510             len = strlen(sr->username) + 1;
 511             if (sr->password)
 512                 len += strlen(sr->password) + 2;
 513             auth->which = Z_IdAuthentication_open;
 514             auth->u.open = odr_malloc(assoc->decode, len);
 515             strcpy(auth->u.open, sr->username);
 516             if (sr->password && *sr->password)
 517             {
 518                 strcat(auth->u.open, "/");
 519                 strcat(auth->u.open, sr->password);
 520             }
 521             assoc->init->auth = auth;
 522         }
 523
 524 #if 1
 525         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 526         assoc->init->charneg_request = ce->u.charNeg3;
 527 #endif
 528         assoc->backend = 0;
 529         if (!(binitres = (*cb->bend_init)(assoc->init)))
 530         {
 531             assoc->state = ASSOC_DEAD;
 532             yaz_add_srw_diagnostic(assoc->encode, d, num,
 533                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 534             return 0;
 535         }
 536         assoc->backend = binitres->handle;
 537         assoc->init->auth = 0;
 538         if (binitres->errcode)
 539         {
 540             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 541             assoc->state = ASSOC_DEAD;
 542             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 543                                    binitres->errstring);
 544             return 0;
 545         }
 546         return 1;
 547     }
 548     return 1;
 549 }
 550
 551 static const char *get_esn(Z_RecordComposition *comp)
 552 {
 553     if (comp && comp->which == Z_RecordComp_complex)
 554     {
 555         if (comp->u.complex->generic
 556             && comp->u.complex->generic->elementSpec
 557             && (comp->u.complex->generic->elementSpec->which ==
 558                 Z_ElementSpec_elementSetName))
 559             return comp->u.complex->generic->elementSpec->u.elementSetName;
 560     }
 561     else if (comp && comp->which == Z_RecordComp_simple &&
 562              comp->u.simple->which == Z_ElementSetNames_generic)
 563         return comp->u.simple->u.generic;
 564     return 0;
 565 }
 566
 567 static void set_esn(Z_RecordComposition **comp_p, const char *esn, NMEM nmem)
 568 {
 569     Z_RecordComposition *comp = nmem_malloc(nmem, sizeof(*comp));
 570
 571     comp->which = Z_RecordComp_simple;
 572     comp->u.simple = nmem_malloc(nmem, sizeof(*comp->u.simple));
 573     comp->u.simple->which = Z_ElementSetNames_generic;
 574     comp->u.simple->u.generic = nmem_strdup(nmem, esn);
 575     *comp_p = comp;
 576 }
 577
 578 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 579 {
 580 #if YAZ_HAVE_XML2
 581     yaz_record_conv_t rc = 0;
 582     const char *match_schema = 0;
 583     int *match_syntax = 0;
 584
 585     if (assoc->server)
 586     {
 587         int r;
 588         const char *input_schema = get_esn(rr->comp);
 589         Odr_oid *input_syntax_raw = rr->request_format_raw;
 590
 591         const char *backend_schema = 0;
 592         Odr_oid *backend_syntax = 0;
 593
 594         r = yaz_retrieval_request(assoc->server->retrieval,
 595                                   input_schema,
 596                                   input_syntax_raw,
 597                                   &match_schema,
 598                                   &match_syntax,
 599                                   &rc,
 600                                   &backend_schema,
 601                                   &backend_syntax);
 602         if (r == -1) /* error ? */
 603         {
 604             const char *details = yaz_retrieval_get_error(
 605                 assoc->server->retrieval);
 606
 607             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 608             if (details)
 609                 rr->errstring = odr_strdup(rr->stream, details);
 610             return -1;
 611         }
 612         else if (r == 1 || r == 3)
 613         {
 614             const char *details = input_schema;
 615             rr->errcode =  YAZ_BIB1_ELEMENT_SET_NAMES_UNSUPP;
 616             if (details)
 617                 rr->errstring = odr_strdup(rr->stream, details);
 618             return -1;
 619         }
 620         else if (r == 2)
 621         {
 622             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 623             if (input_syntax_raw)
 624             {
 625                 char oidbuf[OID_STR_MAX];
 626                 oid_to_dotstring(input_syntax_raw, oidbuf);
 627                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 628             }
 629             return -1;
 630         }
 631         if (backend_schema)
 632         {
 633             set_esn(&rr->comp, backend_schema, rr->stream->mem);
 634         }
 635         if (backend_syntax)
 636         {
 637             oident *oident_syntax = oid_getentbyoid(backend_syntax);
 638
 639             rr->request_format_raw = backend_syntax;
 640
 641             if (oident_syntax)
 642                 rr->request_format = oident_syntax->value;
 643             else
 644                 rr->request_format = VAL_NONE;
 645         }
 646     }
 647     (*assoc->init->bend_fetch)(assoc->backend, rr);
 648     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
 649     {   /* post conversion must take place .. */
 650         WRBUF output_record = wrbuf_alloc();
 651         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 652         if (r)
 653         {
 654             const char *details = yaz_record_conv_get_error(rc);
 655             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 656             if (details)
 657                 rr->errstring = odr_strdup(rr->stream, details);
 658         }
 659         else
 660         {
 661             rr->len = wrbuf_len(output_record);
 662             rr->record = odr_malloc(rr->stream, rr->len);
 663             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 664         }
 665         wrbuf_free(output_record, 1);
 666     }
 667     if (match_syntax)
 668     {
 669         struct oident *oi = oid_getentbyoid(match_syntax);
 670         rr->output_format = oi ? oi->value : VAL_NONE;
 671         rr->output_format_raw = match_syntax;
 672     }
 673     if (match_schema)
 674         rr->schema = odr_strdup(rr->stream, match_schema);
 675     return 0;
 676 #else
 677     (*assoc->init->bend_fetch)(assoc->backend, rr);
 678 #endif
 679 }
 680
 681 static int srw_bend_fetch(association *assoc, int pos,
 682                           Z_SRW_searchRetrieveRequest *srw_req,
 683                           Z_SRW_record *record)
 684 {
 685     bend_fetch_rr rr;
 686     ODR o = assoc->encode;
 687
 688     rr.setname = "default";
 689     rr.number = pos;
 690     rr.referenceId = 0;
 691     rr.request_format = VAL_TEXT_XML;
 692     rr.request_format_raw = yaz_oidval_to_z3950oid(assoc->decode,
 693                                                    CLASS_RECSYN,
 694                                                    VAL_TEXT_XML);
 695     rr.comp = (Z_RecordComposition *)
 696             odr_malloc(assoc->decode, sizeof(*rr.comp));
 697     rr.comp->which = Z_RecordComp_complex;
 698     rr.comp->u.complex = (Z_CompSpec *)
 699             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 700     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 701         odr_malloc(assoc->encode, sizeof(bool_t));
 702     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 703     rr.comp->u.complex->num_dbSpecific = 0;
 704     rr.comp->u.complex->dbSpecific = 0;
 705     rr.comp->u.complex->num_recordSyntax = 0;
 706     rr.comp->u.complex->recordSyntax = 0;
 707
 708     rr.comp->u.complex->generic = (Z_Specification *)
 709             odr_malloc(assoc->decode, sizeof(Z_Specification));
 710
 711     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 712     rr.comp->u.complex->generic->which = Z_Schema_uri;
 713     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 714
 715     /* ESN = recordSchema if recordSchema is present */
 716     rr.comp->u.complex->generic->elementSpec = 0;
 717     if (srw_req->recordSchema)
 718     {
 719         rr.comp->u.complex->generic->elementSpec =
 720             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 721         rr.comp->u.complex->generic->elementSpec->which =
 722             Z_ElementSpec_elementSetName;
 723         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 724             srw_req->recordSchema;
 725     }
 726
 727     rr.stream = assoc->encode;
 728     rr.print = assoc->print;
 729
 730     rr.basename = 0;
 731     rr.len = 0;
 732     rr.record = 0;
 733     rr.last_in_set = 0;
 734     rr.errcode = 0;
 735     rr.errstring = 0;
 736     rr.surrogate_flag = 0;
 737     rr.schema = srw_req->recordSchema;
 738
 739     if (!assoc->init->bend_fetch)
 740         return 1;
 741
 742     retrieve_fetch(assoc, &rr);
 743
 744     if (rr.errcode && rr.surrogate_flag)
 745     {
 746         int code = yaz_diag_bib1_to_srw(rr.errcode);
 747         const char *message = yaz_diag_srw_str(code);
 748         int len = 200;
 749         if (message)
 750             len += strlen(message);
 751         if (rr.errstring)
 752             len += strlen(rr.errstring);
 753
 754         record->recordData_buf = odr_malloc(o, len);
 755
 756         sprintf(record->recordData_buf, "<diagnostic "
 757                 "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
 758                 " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
 759         if (rr.errstring)
 760             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 761                     " <details>%s</details>\n", rr.errstring);
 762         if (message)
 763             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 764                     " <message>%s</message>\n", message);
 765         sprintf(record->recordData_buf + strlen(record->recordData_buf),
 766                 "</diagnostic>\n");
 767         record->recordData_len = strlen(record->recordData_buf);
 768         record->recordPosition = odr_intdup(o, pos);
 769         record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
 770         return 0;
 771     }
 772     else if (rr.len >= 0)
 773     {
 774         record->recordData_buf = rr.record;
 775         record->recordData_len = rr.len;
 776         record->recordPosition = odr_intdup(o, pos);
 777         if (rr.schema)
 778             record->recordSchema = odr_strdup(o, rr.schema);
 779         else
 780             record->recordSchema = 0;
 781     }
 782     return rr.errcode;
 783 }
 784
 785 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 786                    Z_Query *query_result)
 787 {
 788     /* have a CQL query and  CQL to PQF transform .. */
 789     CQL_parser cp = cql_parser_create();
 790     int r;
 791     int srw_errcode = 0;
 792     const char *add = 0;
 793     char rpn_buf[5120];
 794
 795     r = cql_parser_string(cp, cql);
 796     if (r)
 797     {
 798         /* CQL syntax error */
 799         srw_errcode = 10;
 800     }
 801     if (!r)
 802     {
 803         /* Syntax OK */
 804         r = cql_transform_buf(ct,
 805                               cql_parser_result(cp),
 806                               rpn_buf, sizeof(rpn_buf)-1);
 807         if (r)
 808             srw_errcode  = cql_transform_error(ct, &add);
 809     }
 810     if (!r)
 811     {
 812         /* Syntax & transform OK. */
 813         /* Convert PQF string to Z39.50 to RPN query struct */
 814         YAZ_PQF_Parser pp = yaz_pqf_create();
 815         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 816         if (!rpnquery)
 817         {
 818             size_t off;
 819             const char *pqf_msg;
 820             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 821             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 822                     pqf_msg, code);
 823             srw_errcode = 10;
 824         }
 825         else
 826         {
 827             query_result->which = Z_Query_type_1;
 828             query_result->u.type_1 = rpnquery;
 829         }
 830         yaz_pqf_destroy(pp);
 831     }
 832     cql_parser_destroy(cp);
 833     return srw_errcode;
 834 }
 835
 836 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 837                         Z_AttributesPlusTerm *result)
 838 {
 839     Z_Query query;
 840     Z_RPNQuery *rpn;
 841     int srw_error = cql2pqf(odr, cql, ct, &query);
 842     if (srw_error)
 843         return srw_error;
 844     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 845         return 10; /* bad query type */
 846     rpn = query.u.type_1;
 847     if (!rpn->RPNStructure)
 848         return 10; /* must be structure */
 849     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 850         return 10; /* must be simple */
 851     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 852         return 10; /* must be attributes plus term node .. */
 853     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 854            sizeof(*result));
 855     return 0;
 856 }
 857
 858 static void srw_bend_search(association *assoc, request *req,
 859                             Z_SRW_PDU *sr,
 860                             Z_SRW_searchRetrieveResponse *srw_res,
 861                             int *http_code)
 862 {
 863     int srw_error = 0;
 864     Z_External *ext;
 865     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 866
 867     *http_code = 200;
 868     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 869     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 870     if (srw_res->num_diagnostics == 0 && assoc->init)
 871     {
 872         bend_search_rr rr;
 873         rr.setname = "default";
 874         rr.replace_set = 1;
 875         rr.num_bases = 1;
 876         rr.basenames = &srw_req->database;
 877         rr.referenceId = 0;
 878         rr.srw_sortKeys = 0;
 879         rr.srw_setname = 0;
 880         rr.srw_setnameIdleTime = 0;
 881         rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 882         rr.query->u.type_1 = 0;
 883
 884         if (srw_req->query_type == Z_SRW_query_type_cql)
 885         {
 886             if (assoc->server && assoc->server->cql_transform)
 887             {
 888                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 889                                           assoc->server->cql_transform,
 890                                           rr.query);
 891                 if (srw_errcode)
 892                 {
 893                     yaz_add_srw_diagnostic(assoc->encode,
 894                                            &srw_res->diagnostics,
 895                                            &srw_res->num_diagnostics,
 896                                            srw_errcode, 0);
 897                 }
 898             }
 899             else
 900             {
 901                 /* CQL query to backend. Wrap it - Z39.50 style */
 902                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 903                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 904                                                         "1.2.840.10003.16.2");
 905                 ext->indirect_reference = 0;
 906                 ext->descriptor = 0;
 907                 ext->which = Z_External_CQL;
 908                 ext->u.cql = srw_req->query.cql;
 909
 910                 rr.query->which = Z_Query_type_104;
 911                 rr.query->u.type_104 =  ext;
 912             }
 913         }
 914         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 915         {
 916             Z_RPNQuery *RPNquery;
 917             YAZ_PQF_Parser pqf_parser;
 918
 919             pqf_parser = yaz_pqf_create ();
 920
 921             RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
 922                                       srw_req->query.pqf);
 923             if (!RPNquery)
 924             {
 925                 const char *pqf_msg;
 926                 size_t off;
 927                 int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
 928                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 929                         code, pqf_msg, (long) off);
 930                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 931             }
 932
 933             rr.query->which = Z_Query_type_1;
 934             rr.query->u.type_1 =  RPNquery;
 935
 936             yaz_pqf_destroy (pqf_parser);
 937         }
 938         else
 939         {
 940             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 941                                    &srw_res->num_diagnostics,
 942                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 943         }
 944         if (rr.query->u.type_1)
 945         {
 946             rr.stream = assoc->encode;
 947             rr.decode = assoc->decode;
 948             rr.print = assoc->print;
 949             rr.request = req;
 950             if ( srw_req->sort.sortKeys )
 951                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 952                                              srw_req->sort.sortKeys );
 953             rr.association = assoc;
 954             rr.fd = 0;
 955             rr.hits = 0;
 956             rr.errcode = 0;
 957             rr.errstring = 0;
 958             rr.search_info = 0;
 959             yaz_log_zquery_level(log_requestdetail,rr.query);
 960
 961             (assoc->init->bend_search)(assoc->backend, &rr);
 962             if (rr.errcode)
 963             {
 964                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 965                 {
 966                     *http_code = 404;
 967                 }
 968                 else
 969                 {
 970                     srw_error = yaz_diag_bib1_to_srw (rr.errcode);
 971                     yaz_add_srw_diagnostic(assoc->encode,
 972                                            &srw_res->diagnostics,
 973                                            &srw_res->num_diagnostics,
 974                                            srw_error, rr.errstring);
 975                 }
 976             }
 977             else
 978             {
 979                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
 980                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
 981
 982                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
 983                         start, number, rr.hits);
 984
 985                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 986                 if (rr.srw_setname)
 987                 {
 988                     srw_res->resultSetId =
 989                         odr_strdup(assoc->encode, rr.srw_setname );
 990                     srw_res->resultSetIdleTime =
 991                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
 992                 }
 993                 if (number > 0)
 994                 {
 995                     int i;
 996
 997                     if (start > rr.hits)
 998                     {
 999                         yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1000                                                &srw_res->num_diagnostics,
1001                                                YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1002                     }
1003                     else
1004                     {
1005                         int ok = 1;
1006                         if (start + number > rr.hits)
1007                             number = rr.hits - start + 1;
1008
1009                         /* Call bend_present if defined */
1010                         if (assoc->init->bend_present)
1011                         {
1012                             bend_present_rr *bprr = (bend_present_rr*)
1013                                 odr_malloc (assoc->decode, sizeof(*bprr));
1014                             bprr->setname = "default";
1015                             bprr->start = start;
1016                             bprr->number = number;
1017                             bprr->format = VAL_TEXT_XML;
1018                             if (srw_req->recordSchema)
1019                             {
1020                                 bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1021                                         sizeof(*bprr->comp));
1022                                 bprr->comp->which = Z_RecordComp_simple;
1023                                 bprr->comp->u.simple = (Z_ElementSetNames *)
1024                                     odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1025                                 bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1026                                 bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1027                             }
1028                             else
1029                             {
1030                                 bprr->comp = 0;
1031                             }
1032                             bprr->stream = assoc->encode;
1033                             bprr->referenceId = 0;
1034                             bprr->print = assoc->print;
1035                             bprr->request = req;
1036                             bprr->association = assoc;
1037                             bprr->errcode = 0;
1038                             bprr->errstring = NULL;
1039                             (*assoc->init->bend_present)(assoc->backend, bprr);
1040
1041                             if (!bprr->request)
1042                                 return;
1043                             if (bprr->errcode)
1044                             {
1045                                 srw_error = yaz_diag_bib1_to_srw (bprr->errcode);
1046                                 yaz_add_srw_diagnostic(assoc->encode,
1047                                                        &srw_res->diagnostics,
1048                                                        &srw_res->num_diagnostics,
1049                                                        srw_error, bprr->errstring);
1050                                 ok = 0;
1051                             }
1052                         }
1053
1054                         if (ok)
1055                         {
1056                             int j = 0;
1057                             int packing = Z_SRW_recordPacking_string;
1058                             if (srw_req->recordPacking){
1059                                 if (!strcmp(srw_req->recordPacking, "xml"))
1060                                     packing = Z_SRW_recordPacking_XML;
1061                                 if (!strcmp(srw_req->recordPacking, "url"))
1062                                     packing = Z_SRW_recordPacking_URL;
1063                             }
1064                             srw_res->records = (Z_SRW_record *)
1065                                 odr_malloc(assoc->encode,
1066                                            number * sizeof(*srw_res->records));
1067
1068                             srw_res->extra_records = (Z_SRW_extra_record **)
1069                                 odr_malloc(assoc->encode,
1070                                            number*sizeof(*srw_res->extra_records));
1071
1072                             for (i = 0; i<number; i++)
1073                             {
1074                                 int errcode;
1075
1076                                 srw_res->records[j].recordPacking = packing;
1077                                 srw_res->records[j].recordData_buf = 0;
1078                                 srw_res->extra_records[j] = 0;
1079                                 yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1080                                 errcode = srw_bend_fetch(assoc, i+start, srw_req,
1081                                                          srw_res->records + j);
1082                                 if (errcode)
1083                                 {
1084                                     yaz_add_srw_diagnostic(assoc->encode,
1085                                                            &srw_res->diagnostics,
1086                                                            &srw_res->num_diagnostics,
1087                                                            yaz_diag_bib1_to_srw (errcode),
1088                                                            rr.errstring);
1089
1090                                     break;
1091                                 }
1092                                 if (srw_res->records[j].recordData_buf)
1093                                     j++;
1094                             }
1095                             srw_res->num_records = j;
1096                             if (!j)
1097                                 srw_res->records = 0;
1098                         }
1099                     }
1100                 }
1101             }
1102         }
1103     }
1104     if (log_request)
1105     {
1106         const char *querystr = "?";
1107         const char *querytype = "?";
1108         WRBUF wr = wrbuf_alloc();
1109
1110         switch (srw_req->query_type)
1111         {
1112         case Z_SRW_query_type_cql:
1113             querytype = "CQL";
1114             querystr = srw_req->query.cql;
1115             break;
1116         case Z_SRW_query_type_pqf:
1117             querytype = "PQF";
1118             querystr = srw_req->query.pqf;
1119             break;
1120         }
1121         wrbuf_printf(wr, "SRWSearch ");
1122         wrbuf_printf(wr, srw_req->database);
1123         wrbuf_printf(wr, " ");
1124         if (srw_res->num_diagnostics)
1125             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1126         else if (*http_code != 200)
1127             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1128         else if (srw_res->numberOfRecords)
1129         {
1130             wrbuf_printf(wr, "OK %d",
1131                          (srw_res->numberOfRecords ?
1132                           *srw_res->numberOfRecords : 0));
1133         }
1134         wrbuf_printf(wr, " %s %d+%d",
1135                      (srw_res->resultSetId ?
1136                       srw_res->resultSetId : "-"),
1137                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1138                      srw_res->num_records);
1139         yaz_log(log_request, "%s %s: %s", wrbuf_buf(wr), querytype, querystr);
1140         wrbuf_free(wr, 1);
1141     }
1142 }
1143
1144 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1145 {
1146 #if YAZ_HAVE_XML2
1147     xmlNodePtr ptr = rr->server_node_ptr;
1148     if (!ptr)
1149         return 0;
1150     for (ptr = ptr->children; ptr; ptr = ptr->next)
1151     {
1152         if (ptr->type != XML_ELEMENT_NODE)
1153             continue;
1154         if (!strcmp((const char *) ptr->name, "explain"))
1155         {
1156             int len;
1157             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1158             xmlChar *buf_out;
1159             char *content;
1160
1161             ptr = xmlCopyNode(ptr, 1);
1162
1163             xmlDocSetRootElement(doc, ptr);
1164
1165             xmlDocDumpMemory(doc, &buf_out, &len);
1166             content = (char*) odr_malloc(rr->stream, 1+len);
1167             memcpy(content, buf_out, len);
1168             content[len] = '\0';
1169
1170             xmlFree(buf_out);
1171             xmlFreeDoc(doc);
1172             rr->explain_buf = content;
1173             return 0;
1174         }
1175     }
1176 #endif
1177     return 0;
1178 }
1179
1180 static void srw_bend_explain(association *assoc, request *req,
1181                              Z_SRW_PDU *sr,
1182                              Z_SRW_explainResponse *srw_res,
1183                              int *http_code)
1184 {
1185     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1186     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1187     *http_code = 404;
1188     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1189     if (assoc->init)
1190     {
1191         bend_explain_rr rr;
1192
1193         rr.stream = assoc->encode;
1194         rr.decode = assoc->decode;
1195         rr.print = assoc->print;
1196         rr.explain_buf = 0;
1197         rr.database = srw_req->database;
1198         if (assoc->server)
1199             rr.server_node_ptr = assoc->server->server_node_ptr;
1200         else
1201             rr.server_node_ptr = 0;
1202         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1203         if (assoc->init->bend_explain)
1204             (*assoc->init->bend_explain)(assoc->backend, &rr);
1205         else
1206             srw_bend_explain_default(assoc->backend, &rr);
1207
1208         if (rr.explain_buf)
1209         {
1210             int packing = Z_SRW_recordPacking_string;
1211             if (srw_req->recordPacking)
1212             {
1213                 if (!strcmp(srw_req->recordPacking, "xml"))
1214                     packing = Z_SRW_recordPacking_XML;
1215                 else if (!strcmp(srw_req->recordPacking, "url"))
1216                     packing = Z_SRW_recordPacking_URL;
1217             }
1218             srw_res->record.recordSchema = rr.schema;
1219             srw_res->record.recordPacking = packing;
1220             srw_res->record.recordData_buf = rr.explain_buf;
1221             srw_res->record.recordData_len = strlen(rr.explain_buf);
1222             srw_res->record.recordPosition = 0;
1223             *http_code = 200;
1224         }
1225     }
1226 }
1227
1228 static void srw_bend_scan(association *assoc, request *req,
1229                           Z_SRW_PDU *sr,
1230                           Z_SRW_scanResponse *srw_res,
1231                           int *http_code)
1232 {
1233     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1234     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1235
1236     *http_code = 200;
1237     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1238     if (srw_res->num_diagnostics == 0 && assoc->init)
1239     {
1240         struct scan_entry *save_entries;
1241
1242         bend_scan_rr *bsrr = (bend_scan_rr *)
1243             odr_malloc (assoc->encode, sizeof(*bsrr));
1244         bsrr->num_bases = 1;
1245         bsrr->basenames = &srw_req->database;
1246
1247         bsrr->num_entries = srw_req->maximumTerms ?
1248             *srw_req->maximumTerms : 10;
1249         bsrr->term_position = srw_req->responsePosition ?
1250             *srw_req->responsePosition : 1;
1251
1252         bsrr->errcode = 0;
1253         bsrr->errstring = 0;
1254         bsrr->referenceId = 0;
1255         bsrr->stream = assoc->encode;
1256         bsrr->print = assoc->print;
1257         bsrr->step_size = odr_intdup(assoc->decode, 0);
1258         bsrr->entries = 0;
1259
1260         if (bsrr->num_entries > 0)
1261         {
1262             int i;
1263             bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1264                                        bsrr->num_entries);
1265             for (i = 0; i<bsrr->num_entries; i++)
1266             {
1267                 bsrr->entries[i].term = 0;
1268                 bsrr->entries[i].occurrences = 0;
1269                 bsrr->entries[i].errcode = 0;
1270                 bsrr->entries[i].errstring = 0;
1271                 bsrr->entries[i].display_term = 0;
1272             }
1273         }
1274         save_entries = bsrr->entries;  /* save it so we can compare later */
1275
1276         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1277             assoc->init->bend_scan)
1278         {
1279             Odr_oid *scan_attributeSet = 0;
1280             oident *attset;
1281             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1282
1283             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1284                                       &scan_attributeSet,
1285                                       srw_req->scanClause.pqf);
1286             if (scan_attributeSet &&
1287                 (attset = oid_getentbyoid(scan_attributeSet)) &&
1288                 (attset->oclass == CLASS_ATTSET ||
1289                  attset->oclass == CLASS_GENERAL))
1290                 bsrr->attributeset = attset->value;
1291             else
1292                 bsrr->attributeset = VAL_NONE;
1293             yaz_pqf_destroy(pqf_parser);
1294             bsrr->scanClause = 0;
1295             ((int (*)(void *, bend_scan_rr *))
1296              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1297         }
1298         else if (srw_req->query_type == Z_SRW_query_type_cql
1299                  && assoc->init->bend_scan && assoc->server
1300                  && assoc->server->cql_transform)
1301         {
1302             int srw_error;
1303             bsrr->scanClause = 0;
1304             bsrr->attributeset = VAL_NONE;
1305             bsrr->term = odr_malloc(assoc->decode, sizeof(*bsrr->term));
1306             srw_error = cql2pqf_scan(assoc->encode,
1307                                      srw_req->scanClause.cql,
1308                                      assoc->server->cql_transform,
1309                                      bsrr->term);
1310             if (srw_error)
1311                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1312                                        &srw_res->num_diagnostics,
1313                                        srw_error, 0);
1314             else
1315             {
1316                 ((int (*)(void *, bend_scan_rr *))
1317                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1318             }
1319         }
1320         else if (srw_req->query_type == Z_SRW_query_type_cql
1321                  && assoc->init->bend_srw_scan)
1322         {
1323             bsrr->term = 0;
1324             bsrr->attributeset = VAL_NONE;
1325             bsrr->scanClause = srw_req->scanClause.cql;
1326             ((int (*)(void *, bend_scan_rr *))
1327              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1328         }
1329         else
1330         {
1331             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1332                                    &srw_res->num_diagnostics,
1333                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1334         }
1335         if (bsrr->errcode)
1336         {
1337             int srw_error;
1338             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1339             {
1340                 *http_code = 404;
1341                 return;
1342             }
1343             srw_error = yaz_diag_bib1_to_srw (bsrr->errcode);
1344
1345             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1346                                    &srw_res->num_diagnostics,
1347                                    srw_error, bsrr->errstring);
1348         }
1349         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1350         {
1351             int i;
1352             srw_res->terms = (Z_SRW_scanTerm*)
1353                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1354                            bsrr->num_entries);
1355
1356             srw_res->num_terms =  bsrr->num_entries;
1357             for (i = 0; i<bsrr->num_entries; i++)
1358             {
1359                 Z_SRW_scanTerm *t = srw_res->terms + i;
1360                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1361                 t->numberOfRecords =
1362                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1363                 t->displayTerm = 0;
1364                 if (save_entries == bsrr->entries &&
1365                     bsrr->entries[i].display_term)
1366                 {
1367                     /* the entries was _not_ set by the handler. So it's
1368                        safe to test for new member display_term. It is
1369                        NULL'ed by us.
1370                     */
1371                     t->displayTerm = odr_strdup(assoc->encode,
1372                                                 bsrr->entries[i].display_term);
1373                 }
1374                 t->whereInList = 0;
1375             }
1376         }
1377     }
1378     if (log_request)
1379     {
1380         WRBUF wr = wrbuf_alloc();
1381         const char *querytype = 0;
1382         const char *querystr = 0;
1383
1384         switch(srw_req->query_type)
1385         {
1386         case Z_SRW_query_type_pqf:
1387             querytype = "PQF";
1388             querystr = srw_req->scanClause.pqf;
1389             break;
1390         case Z_SRW_query_type_cql:
1391             querytype = "CQL";
1392             querystr = srw_req->scanClause.cql;
1393             break;
1394         default:
1395             querytype = "Unknown";
1396             querystr = "";
1397         }
1398         wrbuf_printf(wr, "SRWScan %d+%d",
1399                      (srw_req->responsePosition ?
1400                       *srw_req->responsePosition : 1),
1401                      (srw_req->maximumTerms ?
1402                       *srw_req->maximumTerms : 1));
1403         if (srw_res->num_diagnostics)
1404             wrbuf_printf(wr, " ERROR %s", srw_res->diagnostics[0].uri);
1405         else
1406             wrbuf_printf(wr, " OK -");
1407         wrbuf_printf(wr, " %s: %s", querytype, querystr);
1408         yaz_log(log_request, "%s", wrbuf_buf(wr) );
1409         wrbuf_free(wr, 1);
1410     }
1411
1412 }
1413
1414 static void srw_bend_update(association *assoc, request *req,
1415                             Z_SRW_PDU *sr,
1416                             Z_SRW_updateResponse *srw_res,
1417                             int *http_code)
1418 {
1419     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1420     yaz_log(YLOG_DEBUG, "Got SRW UpdateRequest");
1421     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1422     *http_code = 404;
1423     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1424     if (assoc->init)
1425     {
1426         bend_update_rr rr;
1427
1428         rr.stream = assoc->encode;
1429         rr.print = assoc->print;
1430         rr.num_bases = 1;
1431         rr.basenames = &srw_req->database;
1432         rr.operation = srw_req->operation;
1433         rr.operation_status = "failed";
1434         rr.record_id = 0;
1435         rr.record_version = 0;
1436         rr.record_checksum = 0;
1437         rr.record_old_version = 0;
1438         rr.record_packing = "xml";
1439         rr.record_schema = 0;
1440         rr.record_data = 0;
1441         rr.request_extra_record = 0;
1442         rr.response_extra_record = 0;
1443         rr.extra_request_data = 0;
1444         rr.extra_response_data = 0;
1445         rr.uri = 0;
1446         rr.message = 0;
1447         rr.details = 0;
1448
1449         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1450         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1451         if ( !strcmp( rr.operation, "delete" ) ){
1452             if ( !srw_req->recordId ){
1453                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1454                                        &srw_res->num_diagnostics,
1455                                        7, "recordId" );
1456             }
1457             else {
1458                 rr.record_id = srw_req->recordId;
1459             }
1460             if (  !srw_req->recordVersion ){
1461                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1462                                        &srw_res->num_diagnostics,
1463                                        7, "recordVersion" );
1464             }
1465             else {
1466                 rr.record_version = odr_strdup( assoc->encode,
1467                                                 srw_req->recordVersion );
1468
1469             }
1470             if ( srw_req->recordOldVersion ){
1471                 rr.record_old_version = odr_strdup(assoc->encode,
1472                                                    srw_req->recordOldVersion );
1473             }
1474             if ( srw_req->extraRequestData ){
1475                 rr.extra_request_data = odr_strdup(assoc->encode,
1476                                                    srw_req->extraRequestData );
1477             }
1478         }
1479         else if ( !strcmp( rr.operation, "replace" ) ){
1480             if ( !srw_req->recordId ){
1481                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1482                                        &srw_res->num_diagnostics,
1483                                        7, "recordId" );
1484             }
1485             else {
1486                 rr.record_id = srw_req->recordId;
1487             }
1488             if ( srw_req->record.recordSchema == 0 ){
1489                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1490                                        &srw_res->num_diagnostics,
1491                                        7, "recordSchema" );
1492             }
1493             else {
1494                 rr.record_schema = odr_strdup(assoc->encode,
1495                                               srw_req->record.recordSchema );
1496             }
1497             switch (srw_req->record.recordPacking)
1498             {
1499             case Z_SRW_recordPacking_string:
1500                 rr.record_packing = "string";
1501                 break;
1502             case Z_SRW_recordPacking_XML:
1503                 rr.record_packing = "xml";
1504                 break;
1505             case Z_SRW_recordPacking_URL:
1506                 rr.record_packing = "url";
1507                 break;
1508             }
1509             if ( srw_req->record.recordData_len ){
1510                 rr.record_data = odr_strdupn(assoc->encode,
1511                                              srw_req->record.recordData_buf,
1512                                              srw_req->record.recordData_len );
1513                 rr.request_extra_record = srw_req->extra_record;
1514             }
1515             else {
1516                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1517                                        &srw_res->num_diagnostics,
1518                                        7, "recordData" );
1519             }
1520             if (srw_req->extraRequestData)
1521                 rr.extra_request_data = odr_strdup(assoc->encode,
1522                                                    srw_req->extraRequestData );
1523         }
1524         else if ( !strcmp( rr.operation, "insert" ) )
1525         {
1526             rr.record_id = srw_req->recordId;
1527             if ( srw_req->record.recordSchema == 0 ){
1528                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1529                                        &srw_res->num_diagnostics,
1530                                        7, "recordSchema" );
1531             }
1532             else {
1533                 rr.record_schema = odr_strdup(assoc->encode,
1534                                               srw_req->record.recordSchema);
1535             }
1536             switch (srw_req->record.recordPacking)
1537             {
1538             case Z_SRW_recordPacking_string:
1539                 rr.record_packing = "string";
1540                 break;
1541             case Z_SRW_recordPacking_XML:
1542                 rr.record_packing = "xml";
1543                 break;
1544             case Z_SRW_recordPacking_URL:
1545                 rr.record_packing = "url";
1546                 break;
1547             }
1548
1549             if (srw_req->record.recordData_len)
1550             {
1551                 rr.record_data = odr_strdupn(assoc->encode,
1552                                              srw_req->record.recordData_buf,
1553                                              srw_req->record.recordData_len );
1554                 rr.request_extra_record = srw_req->extra_record;
1555             }
1556             else
1557                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1558                                        &srw_res->num_diagnostics,
1559                                        7, "recordData" );
1560             if ( srw_req->extraRequestData )
1561                 rr.extra_request_data = odr_strdup(assoc->encode,
1562                                                    srw_req->extraRequestData );
1563         }
1564         if (srw_res->num_diagnostics == 0)
1565         {
1566             if ( assoc->init->bend_srw_update)
1567                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1568             else {
1569                 yaz_log( YLOG_WARN, "Got No Update function!");
1570                 return;
1571             }
1572         }
1573
1574         if (rr.uri)
1575             yaz_add_srw_diagnostic_uri(assoc->encode,
1576                                        &srw_res->diagnostics,
1577                                        &srw_res->num_diagnostics,
1578                                        rr.uri,
1579                                        rr.message,
1580                                        rr.details);
1581         srw_res->recordId = rr.record_id;
1582         srw_res->operationStatus = rr.operation_status;
1583         srw_res->recordVersion = rr.record_version;
1584         srw_res->recordChecksum = rr.record_checksum;
1585         srw_res->extraResponseData = rr.extra_response_data;
1586         srw_res->record.recordPosition = 0;
1587         if (srw_res->num_diagnostics == 0 && rr.record_data)
1588         {
1589             srw_res->record.recordSchema = rr.record_schema;
1590             srw_res->record.recordPacking = srw_req->record.recordPacking;
1591             srw_res->record.recordData_buf = rr.record_data;
1592             srw_res->record.recordData_len = strlen(rr.record_data);
1593             srw_res->extra_record = rr.response_extra_record;
1594
1595         }
1596         else
1597             srw_res->record.recordData_len = 0;
1598         *http_code = 200;
1599     }
1600 }
1601
1602 /* check if path is OK (1); BAD (0) */
1603 static int check_path(const char *path)
1604 {
1605     if (*path != '/')
1606         return 0;
1607     if (strstr(path, ".."))
1608         return 0;
1609     return 1;
1610 }
1611
1612 static char *read_file(const char *fname, ODR o, int *sz)
1613 {
1614     char *buf;
1615     FILE *inf = fopen(fname, "rb");
1616     if (!inf)
1617         return 0;
1618
1619     fseek(inf, 0L, SEEK_END);
1620     *sz = ftell(inf);
1621     rewind(inf);
1622     buf = odr_malloc(o, *sz);
1623     fread(buf, 1, *sz, inf);
1624     fclose(inf);
1625     return buf;
1626 }
1627
1628 static void process_http_request(association *assoc, request *req)
1629 {
1630     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1631     ODR o = assoc->encode;
1632     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1633     Z_SRW_PDU *sr = 0;
1634     Z_SOAP *soap_package = 0;
1635     Z_GDU *p = 0;
1636     char *charset = 0;
1637     Z_HTTP_Response *hres = 0;
1638     int keepalive = 1;
1639     const char *stylesheet = 0; /* for now .. set later */
1640     Z_SRW_diagnostic *diagnostic = 0;
1641     int num_diagnostic = 0;
1642     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1643
1644     if (!control_association(assoc, host, 0))
1645     {
1646         p = z_get_HTTP_Response(o, 404);
1647         r = 1;
1648     }
1649     if (r == 2 && assoc->server && assoc->server->docpath
1650         && hreq->path[0] == '/'
1651         &&
1652         /* check if path is a proper prefix of documentroot */
1653         strncmp(hreq->path+1, assoc->server->docpath,
1654                 strlen(assoc->server->docpath))
1655         == 0)
1656     {
1657         if (!check_path(hreq->path))
1658         {
1659             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1660             p = z_get_HTTP_Response(o, 404);
1661         }
1662         else
1663         {
1664             int content_size = 0;
1665             char *content_buf = read_file(hreq->path+1, o, &content_size);
1666             if (!content_buf)
1667             {
1668                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1669                 p = z_get_HTTP_Response(o, 404);
1670             }
1671             else
1672             {
1673                 const char *ctype = 0;
1674                 yaz_mime_types types = yaz_mime_types_create();
1675
1676                 yaz_mime_types_add(types, "xsl", "application/xml");
1677                 yaz_mime_types_add(types, "xml", "application/xml");
1678                 yaz_mime_types_add(types, "css", "text/css");
1679                 yaz_mime_types_add(types, "html", "text/html");
1680                 yaz_mime_types_add(types, "htm", "text/html");
1681                 yaz_mime_types_add(types, "txt", "text/plain");
1682                 yaz_mime_types_add(types, "js", "application/x-javascript");
1683
1684                 yaz_mime_types_add(types, "gif", "image/gif");
1685                 yaz_mime_types_add(types, "png", "image/png");
1686                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1687                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1688
1689                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1690                 if (!ctype)
1691                 {
1692                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1693                     p = z_get_HTTP_Response(o, 404);
1694                 }
1695                 else
1696                 {
1697                     p = z_get_HTTP_Response(o, 200);
1698                     hres = p->u.HTTP_Response;
1699                     hres->content_buf = content_buf;
1700                     hres->content_len = content_size;
1701                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1702                 }
1703                 yaz_mime_types_destroy(types);
1704             }
1705         }
1706         r = 1;
1707     }
1708
1709     if (r == 2)
1710     {
1711         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1712         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1713     }
1714     if (r == 2)  /* not taken */
1715     {
1716         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1717                            &diagnostic, &num_diagnostic);
1718         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1719     }
1720     if (r == 0)  /* decode SRW/SRU OK .. */
1721     {
1722         int http_code = 200;
1723         if (sr->which == Z_SRW_searchRetrieve_request)
1724         {
1725             Z_SRW_PDU *res =
1726                 yaz_srw_get(assoc->encode, Z_SRW_searchRetrieve_response);
1727
1728             stylesheet = sr->u.request->stylesheet;
1729             if (num_diagnostic)
1730             {
1731                 res->u.response->diagnostics = diagnostic;
1732                 res->u.response->num_diagnostics = num_diagnostic;
1733             }
1734             else
1735             {
1736                 srw_bend_search(assoc, req, sr, res->u.response,
1737                                 &http_code);
1738             }
1739             if (http_code == 200)
1740                 soap_package->u.generic->p = res;
1741         }
1742         else if (sr->which == Z_SRW_explain_request)
1743         {
1744             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
1745             stylesheet = sr->u.explain_request->stylesheet;
1746             if (num_diagnostic)
1747             {
1748                 res->u.explain_response->diagnostics = diagnostic;
1749                 res->u.explain_response->num_diagnostics = num_diagnostic;
1750             }
1751             srw_bend_explain(assoc, req, sr,
1752                              res->u.explain_response, &http_code);
1753             if (http_code == 200)
1754                 soap_package->u.generic->p = res;
1755         }
1756         else if (sr->which == Z_SRW_scan_request)
1757         {
1758             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_scan_response);
1759             stylesheet = sr->u.scan_request->stylesheet;
1760             if (num_diagnostic)
1761             {
1762                 res->u.scan_response->diagnostics = diagnostic;
1763                 res->u.scan_response->num_diagnostics = num_diagnostic;
1764             }
1765             srw_bend_scan(assoc, req, sr,
1766                           res->u.scan_response, &http_code);
1767             if (http_code == 200)
1768                 soap_package->u.generic->p = res;
1769         }
1770         else if (sr->which == Z_SRW_update_request)
1771         {
1772             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_update_response);
1773             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1774             if (num_diagnostic)
1775             {
1776                 res->u.update_response->diagnostics = diagnostic;
1777                 res->u.update_response->num_diagnostics = num_diagnostic;
1778             }
1779             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1780             srw_bend_update(assoc, req, sr,
1781                             res->u.update_response, &http_code);
1782             if (http_code == 200)
1783                 soap_package->u.generic->p = res;
1784         }
1785         else
1786         {
1787             yaz_log(log_request, "SOAP ERROR");
1788             /* FIXME - what error, what query */
1789             http_code = 500;
1790             z_soap_error(assoc->encode, soap_package,
1791                          "SOAP-ENV:Client", "Bad method", 0);
1792         }
1793         if (http_code == 200 || http_code == 500)
1794         {
1795             static Z_SOAP_Handler soap_handlers[4] = {
1796 #if YAZ_HAVE_XML2
1797                 {"http://www.loc.gov/zing/srw/", 0,
1798                  (Z_SOAP_fun) yaz_srw_codec},
1799                 {"http://www.loc.gov/zing/srw/v1.0/", 0,
1800                  (Z_SOAP_fun) yaz_srw_codec},
1801                 {"http://www.loc.gov/zing/srw/update/", 0,
1802                  (Z_SOAP_fun) yaz_ucp_codec},
1803 #endif
1804                 {0, 0, 0}
1805             };
1806             char ctype[60];
1807             int ret;
1808             p = z_get_HTTP_Response(o, 200);
1809             hres = p->u.HTTP_Response;
1810
1811             if (!stylesheet && assoc->server)
1812                 stylesheet = assoc->server->stylesheet;
1813
1814             /* empty stylesheet means NO stylesheet */
1815             if (stylesheet && *stylesheet == '\0')
1816                 stylesheet = 0;
1817
1818             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1819                                        &hres->content_buf, &hres->content_len,
1820                                        soap_handlers, charset, stylesheet);
1821             hres->code = http_code;
1822
1823             strcpy(ctype, "text/xml");
1824             if (charset)
1825             {
1826                 strcat(ctype, "; charset=");
1827                 strcat(ctype, charset);
1828             }
1829             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1830         }
1831         else
1832             p = z_get_HTTP_Response(o, http_code);
1833     }
1834
1835     if (p == 0)
1836         p = z_get_HTTP_Response(o, 500);
1837     hres = p->u.HTTP_Response;
1838     if (!strcmp(hreq->version, "1.0"))
1839     {
1840         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1841         if (v && !strcmp(v, "Keep-Alive"))
1842             keepalive = 1;
1843         else
1844             keepalive = 0;
1845         hres->version = "1.0";
1846     }
1847     else
1848     {
1849         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1850         if (v && !strcmp(v, "close"))
1851             keepalive = 0;
1852         else
1853             keepalive = 1;
1854         hres->version = "1.1";
1855     }
1856     if (!keepalive)
1857     {
1858         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1859         assoc->state = ASSOC_DEAD;
1860         assoc->cs_get_mask = 0;
1861     }
1862     else
1863     {
1864         int t;
1865         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1866
1867         if (alive && isdigit(*(const unsigned char *) alive))
1868             t = atoi(alive);
1869         else
1870             t = 15;
1871         if (t < 0 || t > 3600)
1872             t = 3600;
1873         iochan_settimeout(assoc->client_chan,t);
1874         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1875     }
1876     process_gdu_response(assoc, req, p);
1877 }
1878
1879 static void process_gdu_request(association *assoc, request *req)
1880 {
1881     if (req->gdu_request->which == Z_GDU_Z3950)
1882     {
1883         char *msg = 0;
1884         req->apdu_request = req->gdu_request->u.z3950;
1885         if (process_z_request(assoc, req, &msg) < 0)
1886             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1887     }
1888     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1889         process_http_request(assoc, req);
1890     else
1891     {
1892         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1893     }
1894 }
1895
1896 /*
1897  * Initiate request processing.
1898  */
1899 static int process_z_request(association *assoc, request *req, char **msg)
1900 {
1901     int fd = -1;
1902     Z_APDU *res;
1903     int retval;
1904
1905     *msg = "Unknown Error";
1906     assert(req && req->state == REQUEST_IDLE);
1907     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1908     {
1909         *msg = "Missing InitRequest";
1910         return -1;
1911     }
1912     switch (req->apdu_request->which)
1913     {
1914     case Z_APDU_initRequest:
1915         res = process_initRequest(assoc, req); break;
1916     case Z_APDU_searchRequest:
1917         res = process_searchRequest(assoc, req, &fd); break;
1918     case Z_APDU_presentRequest:
1919         res = process_presentRequest(assoc, req, &fd); break;
1920     case Z_APDU_scanRequest:
1921         if (assoc->init->bend_scan)
1922             res = process_scanRequest(assoc, req, &fd);
1923         else
1924         {
1925             *msg = "Cannot handle Scan APDU";
1926             return -1;
1927         }
1928         break;
1929     case Z_APDU_extendedServicesRequest:
1930         if (assoc->init->bend_esrequest)
1931             res = process_ESRequest(assoc, req, &fd);
1932         else
1933         {
1934             *msg = "Cannot handle Extended Services APDU";
1935             return -1;
1936         }
1937         break;
1938     case Z_APDU_sortRequest:
1939         if (assoc->init->bend_sort)
1940             res = process_sortRequest(assoc, req, &fd);
1941         else
1942         {
1943             *msg = "Cannot handle Sort APDU";
1944             return -1;
1945         }
1946         break;
1947     case Z_APDU_close:
1948         process_close(assoc, req);
1949         return 0;
1950     case Z_APDU_deleteResultSetRequest:
1951         if (assoc->init->bend_delete)
1952             res = process_deleteRequest(assoc, req, &fd);
1953         else
1954         {
1955             *msg = "Cannot handle Delete APDU";
1956             return -1;
1957         }
1958         break;
1959     case Z_APDU_segmentRequest:
1960         if (assoc->init->bend_segment)
1961         {
1962             res = process_segmentRequest (assoc, req);
1963         }
1964         else
1965         {
1966             *msg = "Cannot handle Segment APDU";
1967             return -1;
1968         }
1969         break;
1970     case Z_APDU_triggerResourceControlRequest:
1971         return 0;
1972     default:
1973         *msg = "Bad APDU received";
1974         return -1;
1975     }
1976     if (res)
1977     {
1978         yaz_log(YLOG_DEBUG, "  result immediately available");
1979         retval = process_z_response(assoc, req, res);
1980     }
1981     else if (fd < 0)
1982     {
1983         yaz_log(YLOG_DEBUG, "  result unavailble");
1984         retval = 0;
1985     }
1986     else /* no result yet - one will be provided later */
1987     {
1988         IOCHAN chan;
1989
1990         /* Set up an I/O handler for the fd supplied by the backend */
1991
1992         yaz_log(YLOG_DEBUG, "   establishing handler for result");
1993         req->state = REQUEST_PENDING;
1994         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
1995             abort();
1996         iochan_setdata(chan, assoc);
1997         retval = 0;
1998     }
1999     return retval;
2000 }
2001
2002 /*
2003  * Handle message from the backend.
2004  */
2005 void backend_response(IOCHAN i, int event)
2006 {
2007     association *assoc = (association *)iochan_getdata(i);
2008     request *req = request_head(&assoc->incoming);
2009     Z_APDU *res;
2010     int fd;
2011
2012     yaz_log(YLOG_DEBUG, "backend_response");
2013     assert(assoc && req && req->state != REQUEST_IDLE);
2014     /* determine what it is we're waiting for */
2015     switch (req->apdu_request->which)
2016     {
2017         case Z_APDU_searchRequest:
2018             res = response_searchRequest(assoc, req, 0, &fd); break;
2019 #if 0
2020         case Z_APDU_presentRequest:
2021             res = response_presentRequest(assoc, req, 0, &fd); break;
2022         case Z_APDU_scanRequest:
2023             res = response_scanRequest(assoc, req, 0, &fd); break;
2024 #endif
2025         default:
2026             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2027             abort();
2028     }
2029     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2030     {
2031         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2032         do_close(assoc, Z_Close_systemProblem, 0);
2033         iochan_destroy(i);
2034         return;
2035     }
2036     else if (!res) /* no result yet - try again later */
2037     {
2038         yaz_log(YLOG_DEBUG, "   no result yet");
2039         iochan_setfd(i, fd); /* in case fd has changed */
2040     }
2041 }
2042
2043 /*
2044  * Encode response, and transfer the request structure to the outgoing queue.
2045  */
2046 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2047 {
2048     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2049
2050     if (assoc->print)
2051     {
2052         if (!z_GDU(assoc->print, &res, 0, 0))
2053             yaz_log(YLOG_WARN, "ODR print error: %s",
2054                 odr_errmsg(odr_geterror(assoc->print)));
2055         odr_reset(assoc->print);
2056     }
2057     if (!z_GDU(assoc->encode, &res, 0, 0))
2058     {
2059         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2060                 odr_errmsg(odr_geterror(assoc->decode)),
2061                 odr_getelement(assoc->decode));
2062         return -1;
2063     }
2064     req->response = odr_getbuf(assoc->encode, &req->len_response,
2065         &req->size_response);
2066     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2067     odr_reset(assoc->encode);
2068     req->state = REQUEST_IDLE;
2069     request_enq(&assoc->outgoing, req);
2070     /* turn the work over to the ir_session handler */
2071     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2072     assoc->cs_put_mask = EVENT_OUTPUT;
2073     /* Is there more work to be done? give that to the input handler too */
2074 #if 1
2075     if (request_head(&assoc->incoming))
2076     {
2077         yaz_log (YLOG_DEBUG, "more work to be done");
2078         iochan_setevent(assoc->client_chan, EVENT_WORK);
2079     }
2080 #endif
2081     return 0;
2082 }
2083
2084 /*
2085  * Encode response, and transfer the request structure to the outgoing queue.
2086  */
2087 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2088 {
2089     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2090     gres->which = Z_GDU_Z3950;
2091     gres->u.z3950 = res;
2092
2093     return process_gdu_response(assoc, req, gres);
2094 }
2095
2096 static char *get_vhost(Z_OtherInformation *otherInfo)
2097 {
2098     return yaz_oi_get_string_oidval(&otherInfo, VAL_PROXY, 1, 0);
2099 }
2100
2101 /*
2102  * Handle init request.
2103  * At the moment, we don't check the options
2104  * anywhere else in the code - we just try not to do anything that would
2105  * break a naive client. We'll toss 'em into the association block when
2106  * we need them there.
2107  */
2108 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2109 {
2110     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2111     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2112     Z_InitResponse *resp = apdu->u.initResponse;
2113     bend_initresult *binitres;
2114     char *version;
2115     char options[140];
2116     statserv_options_block *cb = 0;  /* by default no control for backend */
2117
2118     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2119         cb = statserv_getcontrol();  /* got control block for backend */
2120
2121     if (cb && assoc->backend)
2122         (*cb->bend_close)(assoc->backend);
2123
2124     yaz_log(log_requestdetail, "Got initRequest");
2125     if (req->implementationId)
2126         yaz_log(log_requestdetail, "Id:        %s",
2127                 req->implementationId);
2128     if (req->implementationName)
2129         yaz_log(log_requestdetail, "Name:      %s",
2130                 req->implementationName);
2131     if (req->implementationVersion)
2132         yaz_log(log_requestdetail, "Version:   %s",
2133                 req->implementationVersion);
2134
2135     assoc_init_reset(assoc);
2136
2137     assoc->init->auth = req->idAuthentication;
2138     assoc->init->referenceId = req->referenceId;
2139
2140     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2141     {
2142         Z_CharSetandLanguageNegotiation *negotiation =
2143             yaz_get_charneg_record (req->otherInfo);
2144         if (negotiation &&
2145             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2146             assoc->init->charneg_request = negotiation;
2147     }
2148
2149     assoc->backend = 0;
2150     if (cb)
2151     {
2152         if (req->implementationVersion)
2153             yaz_log(log_requestdetail, "Config:    %s",
2154                     cb->configname);
2155
2156         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2157
2158         /* we have a backend control block, so call that init function */
2159         if (!(binitres = (*cb->bend_init)(assoc->init)))
2160         {
2161             yaz_log(YLOG_WARN, "Bad response from backend.");
2162             return 0;
2163         }
2164         assoc->backend = binitres->handle;
2165     }
2166     else
2167     {
2168         /* no backend. return error */
2169         binitres = odr_malloc(assoc->encode, sizeof(*binitres));
2170         binitres->errstring = 0;
2171         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2172         iochan_settimeout(assoc->client_chan, 10);
2173     }
2174     if ((assoc->init->bend_sort))
2175         yaz_log (YLOG_DEBUG, "Sort handler installed");
2176     if ((assoc->init->bend_search))
2177         yaz_log (YLOG_DEBUG, "Search handler installed");
2178     if ((assoc->init->bend_present))
2179         yaz_log (YLOG_DEBUG, "Present handler installed");
2180     if ((assoc->init->bend_esrequest))
2181         yaz_log (YLOG_DEBUG, "ESRequest handler installed");
2182     if ((assoc->init->bend_delete))
2183         yaz_log (YLOG_DEBUG, "Delete handler installed");
2184     if ((assoc->init->bend_scan))
2185         yaz_log (YLOG_DEBUG, "Scan handler installed");
2186     if ((assoc->init->bend_segment))
2187         yaz_log (YLOG_DEBUG, "Segment handler installed");
2188
2189     resp->referenceId = req->referenceId;
2190     *options = '\0';
2191     /* let's tell the client what we can do */
2192     if (ODR_MASK_GET(req->options, Z_Options_search))
2193     {
2194         ODR_MASK_SET(resp->options, Z_Options_search);
2195         strcat(options, "srch");
2196     }
2197     if (ODR_MASK_GET(req->options, Z_Options_present))
2198     {
2199         ODR_MASK_SET(resp->options, Z_Options_present);
2200         strcat(options, " prst");
2201     }
2202     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2203         assoc->init->bend_delete)
2204     {
2205         ODR_MASK_SET(resp->options, Z_Options_delSet);
2206         strcat(options, " del");
2207     }
2208     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2209         assoc->init->bend_esrequest)
2210     {
2211         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2212         strcat (options, " extendedServices");
2213     }
2214     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2215     {
2216         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2217         strcat(options, " namedresults");
2218     }
2219     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2220     {
2221         ODR_MASK_SET(resp->options, Z_Options_scan);
2222         strcat(options, " scan");
2223     }
2224     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2225     {
2226         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2227         strcat(options, " concurrop");
2228     }
2229     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2230     {
2231         ODR_MASK_SET(resp->options, Z_Options_sort);
2232         strcat(options, " sort");
2233     }
2234
2235     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
2236         && assoc->init->charneg_response)
2237     {
2238         Z_OtherInformation **p;
2239         Z_OtherInformationUnit *p0;
2240
2241         yaz_oi_APDU(apdu, &p);
2242
2243         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
2244             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2245
2246             p0->which = Z_OtherInfo_externallyDefinedInfo;
2247             p0->information.externallyDefinedInfo =
2248                 assoc->init->charneg_response;
2249         }
2250         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2251         strcat(options, " negotiation");
2252     }
2253
2254     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2255         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2256
2257     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2258     {
2259         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2260         assoc->version = 1; /* 1 & 2 are equivalent */
2261     }
2262     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2263     {
2264         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2265         assoc->version = 2;
2266     }
2267     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2268     {
2269         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2270         assoc->version = 3;
2271     }
2272
2273     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2274     assoc->maximumRecordSize = *req->maximumRecordSize;
2275
2276     if (cb && assoc->maximumRecordSize > cb->maxrecordsize)
2277         assoc->maximumRecordSize = cb->maxrecordsize;
2278     assoc->preferredMessageSize = *req->preferredMessageSize;
2279     if (assoc->preferredMessageSize > assoc->maximumRecordSize)
2280         assoc->preferredMessageSize = assoc->maximumRecordSize;
2281
2282     resp->preferredMessageSize = &assoc->preferredMessageSize;
2283     resp->maximumRecordSize = &assoc->maximumRecordSize;
2284
2285     resp->implementationId = odr_prepend(assoc->encode,
2286                 assoc->init->implementation_id,
2287                 resp->implementationId);
2288
2289     resp->implementationName = odr_prepend(assoc->encode,
2290                 assoc->init->implementation_name,
2291                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2292
2293     version = odr_strdup(assoc->encode, "$Revision: 1.89 $");
2294     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2295         version[strlen(version)-2] = '\0';
2296     resp->implementationVersion = odr_prepend(assoc->encode,
2297                 assoc->init->implementation_version,
2298                 odr_prepend(assoc->encode, &version[11],
2299                             resp->implementationVersion));
2300
2301     if (binitres->errcode)
2302     {
2303         assoc->state = ASSOC_DEAD;
2304         resp->userInformationField =
2305             init_diagnostics(assoc->encode, binitres->errcode,
2306                              binitres->errstring);
2307         *resp->result = 0;
2308     }
2309     if (log_request)
2310     {
2311         if (!req->idAuthentication)
2312             yaz_log(log_request, "Auth none");
2313         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2314         {
2315             const char *open = req->idAuthentication->u.open;
2316             const char *slash = strchr(open, '/');
2317             int len;
2318             if (slash)
2319                 len = slash - open;
2320             else
2321                 len = strlen(open);
2322                 yaz_log(log_request, "Auth open %.*s", len, open);
2323         }
2324         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2325         {
2326             const char *user = req->idAuthentication->u.idPass->userId;
2327             const char *group = req->idAuthentication->u.idPass->groupId;
2328             yaz_log(log_request, "Auth idPass %s %s",
2329                     user ? user : "-", group ? group : "-");
2330         }
2331         else if (req->idAuthentication->which
2332                  == Z_IdAuthentication_anonymous)
2333         {
2334             yaz_log(log_request, "Auth anonymous");
2335         }
2336         else
2337         {
2338             yaz_log(log_request, "Auth other");
2339         }
2340     }
2341     if (log_request)
2342     {
2343         WRBUF wr = wrbuf_alloc();
2344         wrbuf_printf(wr, "Init ");
2345         if (binitres->errcode)
2346             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2347         else
2348             wrbuf_printf(wr, "OK -");
2349         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2350                      (req->implementationId ? req->implementationId :"-"),
2351                      (req->implementationName ?
2352                       req->implementationName : "-"),
2353                      (req->implementationVersion ?
2354                       req->implementationVersion : "-")
2355             );
2356         yaz_log(log_request, "%s", wrbuf_buf(wr));
2357         wrbuf_free(wr, 1);
2358     }
2359     return apdu;
2360 }
2361
2362 /*
2363  * Set the specified `errcode' and `errstring' into a UserInfo-1
2364  * external to be returned to the client in accordance with Z35.90
2365  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2366  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2367  */
2368 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2369 {
2370     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2371         addinfo ? " -- " : "", addinfo ? addinfo : "");
2372     return zget_init_diagnostics(odr, error, addinfo);
2373 }
2374
2375 /*
2376  * nonsurrogate diagnostic record.
2377  */
2378 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2379 {
2380     Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec));
2381
2382     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2383             addinfo ? " -- " : "", addinfo ? addinfo : "");
2384
2385     rec->which = Z_Records_NSD;
2386     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2387                                                            error, addinfo);
2388     return rec;
2389 }
2390
2391 /*
2392  * surrogate diagnostic.
2393  */
2394 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2395                                           const char *dbname,
2396                                           int error, const char *addinfo)
2397 {
2398     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2399             addinfo ? " -- " : "", addinfo ? addinfo : "");
2400     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2401 }
2402
2403 static Z_Records *pack_records(association *a, char *setname, int start,
2404                                int *num, Z_RecordComposition *comp,
2405                                int *next, int *pres, oid_value format,
2406                                Z_ReferenceId *referenceId,
2407                                int *oid, int *errcode)
2408 {
2409     int recno, total_length = 0, toget = *num, dumped_records = 0;
2410     Z_Records *records =
2411         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
2412     Z_NamePlusRecordList *reclist =
2413         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
2414     Z_NamePlusRecord **list =
2415         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
2416
2417     records->which = Z_Records_DBOSD;
2418     records->u.databaseOrSurDiagnostics = reclist;
2419     reclist->num_records = 0;
2420     reclist->records = list;
2421     *pres = Z_PresentStatus_success;
2422     *num = 0;
2423     *next = 0;
2424
2425     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2426     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2427         a->maximumRecordSize);
2428     for (recno = start; reclist->num_records < toget; recno++)
2429     {
2430         bend_fetch_rr freq;
2431         Z_NamePlusRecord *thisrec;
2432         int this_length = 0;
2433         /*
2434          * we get the number of bytes allocated on the stream before any
2435          * allocation done by the backend - this should give us a reasonable
2436          * idea of the total size of the data so far.
2437          */
2438         total_length = odr_total(a->encode) - dumped_records;
2439         freq.errcode = 0;
2440         freq.errstring = 0;
2441         freq.basename = 0;
2442         freq.len = 0;
2443         freq.record = 0;
2444         freq.last_in_set = 0;
2445         freq.setname = setname;
2446         freq.surrogate_flag = 0;
2447         freq.number = recno;
2448         freq.comp = comp;
2449         freq.request_format = format;
2450         freq.request_format_raw = oid;
2451         freq.output_format = format;
2452         freq.output_format_raw = 0;
2453         freq.stream = a->encode;
2454         freq.print = a->print;
2455         freq.referenceId = referenceId;
2456         freq.schema = 0;
2457
2458         retrieve_fetch(a, &freq);
2459
2460         *next = freq.last_in_set ? 0 : recno + 1;
2461
2462         /* backend should be able to signal whether error is system-wide
2463            or only pertaining to current record */
2464         if (freq.errcode)
2465         {
2466             if (!freq.surrogate_flag)
2467             {
2468                 char s[20];
2469                 *pres = Z_PresentStatus_failure;
2470                 /* for 'present request out of range',
2471                    set addinfo to record position if not set */
2472                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2473                                 freq.errstring == 0)
2474                 {
2475                     sprintf (s, "%d", recno);
2476                     freq.errstring = s;
2477                 }
2478                 if (errcode)
2479                     *errcode = freq.errcode;
2480                 return diagrec(a, freq.errcode, freq.errstring);
2481             }
2482             reclist->records[reclist->num_records] =
2483                 surrogatediagrec(a, freq.basename, freq.errcode,
2484                                  freq.errstring);
2485             reclist->num_records++;
2486             continue;
2487         }
2488         if (freq.record == 0)  /* no error and no record ? */
2489         {
2490             *next = 0;   /* signal end-of-set and stop */
2491             break;
2492         }
2493         if (freq.len >= 0)
2494             this_length = freq.len;
2495         else
2496             this_length = odr_total(a->encode) - total_length - dumped_records;
2497         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2498             this_length, total_length, dumped_records);
2499         if (a->preferredMessageSize > 0 &&
2500                 this_length + total_length > a->preferredMessageSize)
2501         {
2502             /* record is small enough, really */
2503             if (this_length <= a->preferredMessageSize && recno > start)
2504             {
2505                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2506                 *pres = Z_PresentStatus_partial_2;
2507                 break;
2508             }
2509             /* record can only be fetched by itself */
2510             if (this_length < a->maximumRecordSize)
2511             {
2512                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2513                 if (toget > 1)
2514                 {
2515                     yaz_log(YLOG_DEBUG, "  Dropped it");
2516                     reclist->records[reclist->num_records] =
2517                          surrogatediagrec(a, freq.basename, 16, 0);
2518                     reclist->num_records++;
2519                     dumped_records += this_length;
2520                     continue;
2521                 }
2522             }
2523             else /* too big entirely */
2524             {
2525                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2526                         this_length, a->maximumRecordSize);
2527                 reclist->records[reclist->num_records] =
2528                     surrogatediagrec(a, freq.basename, 17, 0);
2529                 reclist->num_records++;
2530                 dumped_records += this_length;
2531                 continue;
2532             }
2533         }
2534
2535         if (!(thisrec = (Z_NamePlusRecord *)
2536               odr_malloc(a->encode, sizeof(*thisrec))))
2537             return 0;
2538         if (freq.basename)
2539             thisrec->databaseName = odr_strdup(a->encode, freq.basename);
2540         else
2541             thisrec->databaseName = 0;
2542         thisrec->which = Z_NamePlusRecord_databaseRecord;
2543
2544         if (freq.output_format_raw)
2545         {
2546             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
2547             freq.output_format = ident->value;
2548         }
2549         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
2550                                                  freq.record, freq.len);
2551         if (!thisrec->u.databaseRecord)
2552             return 0;
2553         reclist->records[reclist->num_records] = thisrec;
2554         reclist->num_records++;
2555     }
2556     *num = reclist->num_records;
2557     return records;
2558 }
2559
2560 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2561     int *fd)
2562 {
2563     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2564     bend_search_rr *bsrr =
2565         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
2566
2567     yaz_log(log_requestdetail, "Got SearchRequest.");
2568     bsrr->fd = fd;
2569     bsrr->request = reqb;
2570     bsrr->association = assoc;
2571     bsrr->referenceId = req->referenceId;
2572     save_referenceId (reqb, bsrr->referenceId);
2573     bsrr->srw_sortKeys = 0;
2574     bsrr->srw_setname = 0;
2575     bsrr->srw_setnameIdleTime = 0;
2576
2577     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2578     if (req->databaseNames)
2579     {
2580         int i;
2581         for (i = 0; i < req->num_databaseNames; i++)
2582             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2583     }
2584
2585     yaz_log_zquery_level(log_requestdetail,req->query);
2586
2587     if (assoc->init->bend_search)
2588     {
2589         bsrr->setname = req->resultSetName;
2590         bsrr->replace_set = *req->replaceIndicator;
2591         bsrr->num_bases = req->num_databaseNames;
2592         bsrr->basenames = req->databaseNames;
2593         bsrr->query = req->query;
2594         bsrr->stream = assoc->encode;
2595         nmem_transfer(bsrr->stream->mem, reqb->request_mem);
2596         bsrr->decode = assoc->decode;
2597         bsrr->print = assoc->print;
2598         bsrr->hits = 0;
2599         bsrr->errcode = 0;
2600         bsrr->errstring = NULL;
2601         bsrr->search_info = NULL;
2602
2603         if (assoc->server && assoc->server->cql_transform
2604             && req->query->which == Z_Query_type_104
2605             && req->query->u.type_104->which == Z_External_CQL)
2606         {
2607             /* have a CQL query and a CQL to PQF transform .. */
2608             int srw_errcode =
2609                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2610                         assoc->server->cql_transform, bsrr->query);
2611             if (srw_errcode)
2612                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2613         }
2614         if (!bsrr->errcode)
2615             (assoc->init->bend_search)(assoc->backend, bsrr);
2616         if (!bsrr->request)  /* backend not ready with the search response */
2617             return 0;  /* should not be used any more */
2618     }
2619     else
2620     {
2621         /* FIXME - make a diagnostic for it */
2622         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2623     }
2624     return response_searchRequest(assoc, reqb, bsrr, fd);
2625 }
2626
2627 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2628
2629 /*
2630  * Prepare a searchresponse based on the backend results. We probably want
2631  * to look at making the fetching of records nonblocking as well, but
2632  * so far, we'll keep things simple.
2633  * If bsrt is null, that means we're called in response to a communications
2634  * event, and we'll have to get the response for ourselves.
2635  */
2636 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2637     bend_search_rr *bsrt, int *fd)
2638 {
2639     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2640     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2641     Z_SearchResponse *resp = (Z_SearchResponse *)
2642         odr_malloc (assoc->encode, sizeof(*resp));
2643     int *nulint = odr_intdup (assoc->encode, 0);
2644     bool_t *sr = odr_intdup(assoc->encode, 1);
2645     int *next = odr_intdup(assoc->encode, 0);
2646     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2647     int returnedrecs=0;
2648
2649     apdu->which = Z_APDU_searchResponse;
2650     apdu->u.searchResponse = resp;
2651     resp->referenceId = req->referenceId;
2652     resp->additionalSearchInfo = 0;
2653     resp->otherInfo = 0;
2654     *fd = -1;
2655     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2656     {
2657         yaz_log(YLOG_FATAL, "Bad result from backend");
2658         return 0;
2659     }
2660     else if (bsrt->errcode)
2661     {
2662         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2663         resp->resultCount = nulint;
2664         resp->numberOfRecordsReturned = nulint;
2665         resp->nextResultSetPosition = nulint;
2666         resp->searchStatus = nulint;
2667         resp->resultSetStatus = none;
2668         resp->presentStatus = 0;
2669     }
2670     else
2671     {
2672         int *toget = odr_intdup(assoc->encode, 0);
2673         int *presst = odr_intdup(assoc->encode, 0);
2674         Z_RecordComposition comp, *compp = 0;
2675
2676         yaz_log (log_requestdetail, "resultCount: %d", bsrt->hits);
2677
2678         resp->records = 0;
2679         resp->resultCount = &bsrt->hits;
2680
2681         comp.which = Z_RecordComp_simple;
2682         /* how many records does the user agent want, then? */
2683         if (bsrt->hits <= *req->smallSetUpperBound)
2684         {
2685             *toget = bsrt->hits;
2686             if ((comp.u.simple = req->smallSetElementSetNames))
2687                 compp = &comp;
2688         }
2689         else if (bsrt->hits < *req->largeSetLowerBound)
2690         {
2691             *toget = *req->mediumSetPresentNumber;
2692             if (*toget > bsrt->hits)
2693                 *toget = bsrt->hits;
2694             if ((comp.u.simple = req->mediumSetElementSetNames))
2695                 compp = &comp;
2696         }
2697         else
2698             *toget = 0;
2699
2700         if (*toget && !resp->records)
2701         {
2702             oident *prefformat;
2703             oid_value form;
2704
2705             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2706                 form = VAL_NONE;
2707             else
2708                 form = prefformat->value;
2709
2710             /* Call bend_present if defined */
2711             if (assoc->init->bend_present)
2712             {
2713                 bend_present_rr *bprr = (bend_present_rr *)
2714                     nmem_malloc (reqb->request_mem, sizeof(*bprr));
2715                 bprr->setname = req->resultSetName;
2716                 bprr->start = 1;
2717                 bprr->number = *toget;
2718                 bprr->format = form;
2719                 bprr->comp = compp;
2720                 bprr->referenceId = req->referenceId;
2721                 bprr->stream = assoc->encode;
2722                 bprr->print = assoc->print;
2723                 bprr->request = reqb;
2724                 bprr->association = assoc;
2725                 bprr->errcode = 0;
2726                 bprr->errstring = NULL;
2727                 (*assoc->init->bend_present)(assoc->backend, bprr);
2728
2729                 if (!bprr->request)
2730                     return 0;
2731                 if (bprr->errcode)
2732                 {
2733                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2734                     *resp->presentStatus = Z_PresentStatus_failure;
2735                 }
2736             }
2737
2738             if (!resp->records)
2739                 resp->records = pack_records(assoc, req->resultSetName, 1,
2740                                              toget, compp, next, presst, form, req->referenceId,
2741                                              req->preferredRecordSyntax, NULL);
2742             if (!resp->records)
2743                 return 0;
2744             resp->numberOfRecordsReturned = toget;
2745             returnedrecs = *toget;
2746             resp->nextResultSetPosition = next;
2747             resp->searchStatus = sr;
2748             resp->resultSetStatus = 0;
2749             resp->presentStatus = presst;
2750         }
2751         else
2752         {
2753             if (*resp->resultCount)
2754                 *next = 1;
2755             resp->numberOfRecordsReturned = nulint;
2756             resp->nextResultSetPosition = next;
2757             resp->searchStatus = sr;
2758             resp->resultSetStatus = 0;
2759             resp->presentStatus = 0;
2760         }
2761     }
2762     resp->additionalSearchInfo = bsrt->search_info;
2763
2764     if (log_request)
2765     {
2766         int i;
2767         WRBUF wr = wrbuf_alloc();
2768         /* int num_databaseNames;
2769            Z_DatabaseName **databaseNames; */
2770         for (i = 0 ; i < req->num_databaseNames; i++){
2771             if (i)
2772                 wrbuf_printf(wr, ",");
2773             wrbuf_printf(wr, req->databaseNames[i]);
2774         }
2775         wrbuf_printf(wr, " ");
2776
2777         if (bsrt->errcode)
2778             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2779         else
2780             wrbuf_printf(wr, "OK %d", bsrt->hits);
2781         wrbuf_printf(wr, " %s 1+%d ",
2782                      req->resultSetName, returnedrecs);
2783         yaz_query_to_wrbuf(wr, req->query);
2784
2785         yaz_log(log_request, "Search %s", wrbuf_buf(wr));
2786         wrbuf_free(wr, 1);
2787     }
2788     return apdu;
2789 }
2790
2791 /*
2792  * Maybe we got a little over-friendly when we designed bend_fetch to
2793  * get only one record at a time. Some backends can optimise multiple-record
2794  * fetches, and at any rate, there is some overhead involved in
2795  * all that selecting and hopping around. Problem is, of course, that the
2796  * frontend can't know ahead of time how many records it'll need to
2797  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2798  * is downright lousy as a bulk data transfer protocol.
2799  *
2800  * To start with, we'll do the fetching of records from the backend
2801  * in one operation: To save some trips in and out of the event-handler,
2802  * and to simplify the interface to pack_records. At any rate, asynch
2803  * operation is more fun in operations that have an unpredictable execution
2804  * speed - which is normally more true for search than for present.
2805  */
2806 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2807                                       int *fd)
2808 {
2809     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2810     oident *prefformat;
2811     oid_value form;
2812     Z_APDU *apdu;
2813     Z_PresentResponse *resp;
2814     int *next;
2815     int *num;
2816     int errcode = 0;
2817     const char *errstring = 0;
2818
2819     yaz_log(log_requestdetail, "Got PresentRequest.");
2820
2821     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2822         form = VAL_NONE;
2823     else
2824         form = prefformat->value;
2825     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2826     resp->records = 0;
2827     resp->presentStatus = odr_intdup(assoc->encode, 0);
2828     if (assoc->init->bend_present)
2829     {
2830         bend_present_rr *bprr = (bend_present_rr *)
2831             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2832         bprr->setname = req->resultSetId;
2833         bprr->start = *req->resultSetStartPoint;
2834         bprr->number = *req->numberOfRecordsRequested;
2835         bprr->format = form;
2836         bprr->comp = req->recordComposition;
2837         bprr->referenceId = req->referenceId;
2838         bprr->stream = assoc->encode;
2839         bprr->print = assoc->print;
2840         bprr->request = reqb;
2841         bprr->association = assoc;
2842         bprr->errcode = 0;
2843         bprr->errstring = NULL;
2844         (*assoc->init->bend_present)(assoc->backend, bprr);
2845
2846         if (!bprr->request)
2847             return 0; /* should not happen */
2848         if (bprr->errcode)
2849         {
2850             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2851             *resp->presentStatus = Z_PresentStatus_failure;
2852             errcode = bprr->errcode;
2853             errstring = bprr->errstring;
2854         }
2855     }
2856     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2857     next = odr_intdup(assoc->encode, 0);
2858     num = odr_intdup(assoc->encode, 0);
2859
2860     apdu->which = Z_APDU_presentResponse;
2861     apdu->u.presentResponse = resp;
2862     resp->referenceId = req->referenceId;
2863     resp->otherInfo = 0;
2864
2865     if (!resp->records)
2866     {
2867         *num = *req->numberOfRecordsRequested;
2868         resp->records =
2869             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2870                          num, req->recordComposition, next,
2871                          resp->presentStatus,
2872                          form, req->referenceId, req->preferredRecordSyntax,
2873                          &errcode);
2874     }
2875     if (log_request)
2876     {
2877         WRBUF wr = wrbuf_alloc();
2878         wrbuf_printf(wr, "Present ");
2879
2880         if (*resp->presentStatus == Z_PresentStatus_failure)
2881             wrbuf_printf(wr, "ERROR %d", errcode);
2882         else if (*resp->presentStatus == Z_PresentStatus_success)
2883             wrbuf_printf(wr, "OK -");
2884         else
2885             wrbuf_printf(wr, "Partial %d", *resp->presentStatus);
2886
2887         wrbuf_printf(wr, " %s %d+%d ",
2888                 req->resultSetId, *req->resultSetStartPoint,
2889                 *req->numberOfRecordsRequested);
2890         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2891         wrbuf_free(wr, 1);
2892     }
2893     if (!resp->records)
2894         return 0;
2895     resp->numberOfRecordsReturned = num;
2896     resp->nextResultSetPosition = next;
2897
2898     return apdu;
2899 }
2900
2901 /*
2902  * Scan was implemented rather in a hurry, and with support for only the basic
2903  * elements of the service in the backend API. Suggestions are welcome.
2904  */
2905 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2906 {
2907     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2908     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2909     Z_ScanResponse *res = (Z_ScanResponse *)
2910         odr_malloc (assoc->encode, sizeof(*res));
2911     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2912     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2913     Z_ListEntries *ents = (Z_ListEntries *)
2914         odr_malloc (assoc->encode, sizeof(*ents));
2915     Z_DiagRecs *diagrecs_p = NULL;
2916     oident *attset;
2917     bend_scan_rr *bsrr = (bend_scan_rr *)
2918         odr_malloc (assoc->encode, sizeof(*bsrr));
2919     struct scan_entry *save_entries;
2920
2921     yaz_log(log_requestdetail, "Got ScanRequest");
2922
2923     apdu->which = Z_APDU_scanResponse;
2924     apdu->u.scanResponse = res;
2925     res->referenceId = req->referenceId;
2926
2927     /* if step is absent, set it to 0 */
2928     res->stepSize = odr_intdup(assoc->encode, 0);
2929     if (req->stepSize)
2930         *res->stepSize = *req->stepSize;
2931
2932     res->scanStatus = scanStatus;
2933     res->numberOfEntriesReturned = numberOfEntriesReturned;
2934     res->positionOfTerm = 0;
2935     res->entries = ents;
2936     ents->num_entries = 0;
2937     ents->entries = NULL;
2938     ents->num_nonsurrogateDiagnostics = 0;
2939     ents->nonsurrogateDiagnostics = NULL;
2940     res->attributeSet = 0;
2941     res->otherInfo = 0;
2942
2943     if (req->databaseNames)
2944     {
2945         int i;
2946         for (i = 0; i < req->num_databaseNames; i++)
2947             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2948     }
2949     bsrr->scanClause = 0;
2950     bsrr->errcode = 0;
2951     bsrr->errstring = 0;
2952     bsrr->num_bases = req->num_databaseNames;
2953     bsrr->basenames = req->databaseNames;
2954     bsrr->num_entries = *req->numberOfTermsRequested;
2955     bsrr->term = req->termListAndStartPoint;
2956     bsrr->referenceId = req->referenceId;
2957     bsrr->stream = assoc->encode;
2958     bsrr->print = assoc->print;
2959     bsrr->step_size = res->stepSize;
2960     bsrr->entries = 0;
2961     /* For YAZ 2.0 and earlier it was the backend handler that
2962        initialized entries (member display_term did not exist)
2963        YAZ 2.0 and later sets 'entries'  and initialize all members
2964        including 'display_term'. If YAZ 2.0 or later sees that
2965        entries was modified - we assume that it is an old handler and
2966        that 'display_term' is _not_ set.
2967     */
2968     if (bsrr->num_entries > 0)
2969     {
2970         int i;
2971         bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
2972                                    bsrr->num_entries);
2973         for (i = 0; i<bsrr->num_entries; i++)
2974         {
2975             bsrr->entries[i].term = 0;
2976             bsrr->entries[i].occurrences = 0;
2977             bsrr->entries[i].errcode = 0;
2978             bsrr->entries[i].errstring = 0;
2979             bsrr->entries[i].display_term = 0;
2980         }
2981     }
2982     save_entries = bsrr->entries;  /* save it so we can compare later */
2983
2984     if (req->attributeSet &&
2985         (attset = oid_getentbyoid(req->attributeSet)) &&
2986         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
2987         bsrr->attributeset = attset->value;
2988     else
2989         bsrr->attributeset = VAL_NONE;
2990     log_scan_term_level (log_requestdetail, req->termListAndStartPoint,
2991             bsrr->attributeset);
2992     bsrr->term_position = req->preferredPositionInResponse ?
2993         *req->preferredPositionInResponse : 1;
2994
2995     ((int (*)(void *, bend_scan_rr *))
2996      (*assoc->init->bend_scan))(assoc->backend, bsrr);
2997
2998     if (bsrr->errcode)
2999         diagrecs_p = zget_DiagRecs(assoc->encode,
3000                                    bsrr->errcode, bsrr->errstring);
3001     else
3002     {
3003         int i;
3004         Z_Entry **tab = (Z_Entry **)
3005             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
3006
3007         if (bsrr->status == BEND_SCAN_PARTIAL)
3008             *scanStatus = Z_Scan_partial_5;
3009         else
3010             *scanStatus = Z_Scan_success;
3011         ents->entries = tab;
3012         ents->num_entries = bsrr->num_entries;
3013         res->numberOfEntriesReturned = &ents->num_entries;
3014         res->positionOfTerm = &bsrr->term_position;
3015         for (i = 0; i < bsrr->num_entries; i++)
3016         {
3017             Z_Entry *e;
3018             Z_TermInfo *t;
3019             Odr_oct *o;
3020
3021             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3022             if (bsrr->entries[i].occurrences >= 0)
3023             {
3024                 e->which = Z_Entry_termInfo;
3025                 e->u.termInfo = t = (Z_TermInfo *)
3026                     odr_malloc(assoc->encode, sizeof(*t));
3027                 t->suggestedAttributes = 0;
3028                 t->displayTerm = 0;
3029                 if (save_entries == bsrr->entries &&
3030                     bsrr->entries[i].display_term)
3031                 {
3032                     /* the entries was _not_ set by the handler. So it's
3033                        safe to test for new member display_term. It is
3034                        NULL'ed by us.
3035                     */
3036                     t->displayTerm = odr_strdup(assoc->encode,
3037                                                 bsrr->entries[i].display_term);
3038                 }
3039                 t->alternativeTerm = 0;
3040                 t->byAttributes = 0;
3041                 t->otherTermInfo = 0;
3042                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3043                 t->term = (Z_Term *)
3044                     odr_malloc(assoc->encode, sizeof(*t->term));
3045                 t->term->which = Z_Term_general;
3046                 t->term->u.general = o =
3047                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3048                 o->buf = (unsigned char *)
3049                     odr_malloc(assoc->encode, o->len = o->size =
3050                                strlen(bsrr->entries[i].term));
3051                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3052                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3053                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3054             }
3055             else
3056             {
3057                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3058                                                   bsrr->entries[i].errcode,
3059                                                   bsrr->entries[i].errstring);
3060                 assert (drecs->num_diagRecs == 1);
3061                 e->which = Z_Entry_surrogateDiagnostic;
3062                 assert (drecs->diagRecs[0]);
3063                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3064             }
3065         }
3066     }
3067     if (diagrecs_p)
3068     {
3069         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3070         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3071     }
3072     if (log_request)
3073     {
3074         WRBUF wr = wrbuf_alloc();
3075         if (bsrr->errcode)
3076             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3077         else if (*res->scanStatus == Z_Scan_success)
3078             wrbuf_printf(wr, "OK");
3079         else
3080             wrbuf_printf(wr, "Partial");
3081
3082         wrbuf_printf(wr, " %d+%d %d ",
3083                      (req->preferredPositionInResponse ?
3084                       *req->preferredPositionInResponse : 1),
3085                      *req->numberOfTermsRequested,
3086                      (res->stepSize ? *res->stepSize : 0));
3087         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3088                           bsrr->attributeset);
3089         yaz_log(log_request, "Scan %s", wrbuf_buf(wr) );
3090         wrbuf_free(wr, 1);
3091     }
3092     return apdu;
3093 }
3094
3095 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3096     int *fd)
3097 {
3098     int i;
3099     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3100     Z_SortResponse *res = (Z_SortResponse *)
3101         odr_malloc (assoc->encode, sizeof(*res));
3102     bend_sort_rr *bsrr = (bend_sort_rr *)
3103         odr_malloc (assoc->encode, sizeof(*bsrr));
3104
3105     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3106
3107     yaz_log(log_requestdetail, "Got SortRequest.");
3108
3109     bsrr->num_input_setnames = req->num_inputResultSetNames;
3110     for (i=0;i<req->num_inputResultSetNames;i++)
3111         yaz_log(log_requestdetail, "Input resultset: '%s'",
3112                 req->inputResultSetNames[i]);
3113     bsrr->input_setnames = req->inputResultSetNames;
3114     bsrr->referenceId = req->referenceId;
3115     bsrr->output_setname = req->sortedResultSetName;
3116     yaz_log(log_requestdetail, "Output resultset: '%s'",
3117                 req->sortedResultSetName);
3118     bsrr->sort_sequence = req->sortSequence;
3119        /*FIXME - dump those sequences too */
3120     bsrr->stream = assoc->encode;
3121     bsrr->print = assoc->print;
3122
3123     bsrr->sort_status = Z_SortResponse_failure;
3124     bsrr->errcode = 0;
3125     bsrr->errstring = 0;
3126
3127     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3128
3129     res->referenceId = bsrr->referenceId;
3130     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3131     res->resultSetStatus = 0;
3132     if (bsrr->errcode)
3133     {
3134         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3135                                        bsrr->errcode, bsrr->errstring);
3136         res->diagnostics = dr->diagRecs;
3137         res->num_diagnostics = dr->num_diagRecs;
3138     }
3139     else
3140     {
3141         res->num_diagnostics = 0;
3142         res->diagnostics = 0;
3143     }
3144     res->resultCount = 0;
3145     res->otherInfo = 0;
3146
3147     apdu->which = Z_APDU_sortResponse;
3148     apdu->u.sortResponse = res;
3149     if (log_request)
3150     {
3151         WRBUF wr = wrbuf_alloc();
3152         wrbuf_printf(wr, "Sort ");
3153         if (bsrr->errcode)
3154             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3155         else
3156             wrbuf_printf(wr,  "OK -");
3157         wrbuf_printf(wr, " (");
3158         for (i = 0; i<req->num_inputResultSetNames; i++)
3159         {
3160             if (i)
3161                 wrbuf_printf(wr, ",");
3162             wrbuf_printf(wr, req->inputResultSetNames[i]);
3163         }
3164         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3165
3166         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3167         wrbuf_free(wr, 1);
3168     }
3169     return apdu;
3170 }
3171
3172 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3173     int *fd)
3174 {
3175     int i;
3176     Z_DeleteResultSetRequest *req =
3177         reqb->apdu_request->u.deleteResultSetRequest;
3178     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3179         odr_malloc (assoc->encode, sizeof(*res));
3180     bend_delete_rr *bdrr = (bend_delete_rr *)
3181         odr_malloc (assoc->encode, sizeof(*bdrr));
3182     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3183
3184     yaz_log(log_requestdetail, "Got DeleteRequest.");
3185
3186     bdrr->num_setnames = req->num_resultSetList;
3187     bdrr->setnames = req->resultSetList;
3188     for (i = 0; i<req->num_resultSetList; i++)
3189         yaz_log(log_requestdetail, "resultset: '%s'",
3190                 req->resultSetList[i]);
3191     bdrr->stream = assoc->encode;
3192     bdrr->print = assoc->print;
3193     bdrr->function = *req->deleteFunction;
3194     bdrr->referenceId = req->referenceId;
3195     bdrr->statuses = 0;
3196     if (bdrr->num_setnames > 0)
3197     {
3198         bdrr->statuses = (int*)
3199             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3200                        bdrr->num_setnames);
3201         for (i = 0; i < bdrr->num_setnames; i++)
3202             bdrr->statuses[i] = 0;
3203     }
3204     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3205
3206     res->referenceId = req->referenceId;
3207
3208     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3209
3210     res->deleteListStatuses = 0;
3211     if (bdrr->num_setnames > 0)
3212     {
3213         int i;
3214         res->deleteListStatuses = (Z_ListStatuses *)
3215             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3216         res->deleteListStatuses->num = bdrr->num_setnames;
3217         res->deleteListStatuses->elements =
3218             (Z_ListStatus **)
3219             odr_malloc (assoc->encode,
3220                         sizeof(*res->deleteListStatuses->elements) *
3221                         bdrr->num_setnames);
3222         for (i = 0; i<bdrr->num_setnames; i++)
3223         {
3224             res->deleteListStatuses->elements[i] =
3225                 (Z_ListStatus *)
3226                 odr_malloc (assoc->encode,
3227                             sizeof(**res->deleteListStatuses->elements));
3228             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3229             res->deleteListStatuses->elements[i]->id =
3230                 odr_strdup (assoc->encode, bdrr->setnames[i]);
3231         }
3232     }
3233     res->numberNotDeleted = 0;
3234     res->bulkStatuses = 0;
3235     res->deleteMessage = 0;
3236     res->otherInfo = 0;
3237
3238     apdu->which = Z_APDU_deleteResultSetResponse;
3239     apdu->u.deleteResultSetResponse = res;
3240     if (log_request)
3241     {
3242         WRBUF wr = wrbuf_alloc();
3243         wrbuf_printf(wr, "Delete ");
3244         if (bdrr->delete_status)
3245             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3246         else
3247             wrbuf_printf(wr, "OK -");
3248         for (i = 0; i<req->num_resultSetList; i++)
3249             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3250         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3251         wrbuf_free(wr, 1);
3252     }
3253     return apdu;
3254 }
3255
3256 static void process_close(association *assoc, request *reqb)
3257 {
3258     Z_Close *req = reqb->apdu_request->u.close;
3259     static char *reasons[] =
3260     {
3261         "finished",
3262         "shutdown",
3263         "systemProblem",
3264         "costLimit",
3265         "resources",
3266         "securityViolation",
3267         "protocolError",
3268         "lackOfActivity",
3269         "peerAbort",
3270         "unspecified"
3271     };
3272
3273     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3274         reasons[*req->closeReason], req->diagnosticInformation ?
3275         req->diagnosticInformation : "NULL");
3276     if (assoc->version < 3) /* to make do_force respond with close */
3277         assoc->version = 3;
3278     do_close_req(assoc, Z_Close_finished,
3279                  "Association terminated by client", reqb);
3280     yaz_log(log_request,"Close OK");
3281 }
3282
3283 void save_referenceId (request *reqb, Z_ReferenceId *refid)
3284 {
3285     if (refid)
3286     {
3287         reqb->len_refid = refid->len;
3288         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
3289         memcpy (reqb->refid, refid->buf, refid->len);
3290     }
3291     else
3292     {
3293         reqb->len_refid = 0;
3294         reqb->refid = NULL;
3295     }
3296 }
3297
3298 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
3299 {
3300     process_z_response (a, req, res);
3301 }
3302
3303 bend_request bend_request_mk (bend_association a)
3304 {
3305     request *nreq = request_get (&a->outgoing);
3306     nreq->request_mem = nmem_create ();
3307     return nreq;
3308 }
3309
3310 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
3311 {
3312     Z_ReferenceId *id;
3313     if (!req->refid)
3314         return 0;
3315     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
3316     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
3317     id->len = id->size = req->len_refid;
3318     memcpy (id->buf, req->refid, req->len_refid);
3319     return id;
3320 }
3321
3322 void bend_request_destroy (bend_request *req)
3323 {
3324     nmem_destroy((*req)->request_mem);
3325     request_release(*req);
3326     *req = NULL;
3327 }
3328
3329 int bend_backend_respond (bend_association a, bend_request req)
3330 {
3331     char *msg;
3332     int r;
3333     r = process_z_request (a, req, &msg);
3334     if (r < 0)
3335         yaz_log (YLOG_WARN, "%s", msg);
3336     return r;
3337 }
3338
3339 void bend_request_setdata(bend_request r, void *p)
3340 {
3341     r->clientData = p;
3342 }
3343
3344 void *bend_request_getdata(bend_request r)
3345 {
3346     return r->clientData;
3347 }
3348
3349 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
3350 {
3351     bend_segment_rr req;
3352
3353     req.segment = reqb->apdu_request->u.segmentRequest;
3354     req.stream = assoc->encode;
3355     req.decode = assoc->decode;
3356     req.print = assoc->print;
3357     req.association = assoc;
3358
3359     (*assoc->init->bend_segment)(assoc->backend, &req);
3360
3361     return 0;
3362 }
3363
3364 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3365 {
3366     bend_esrequest_rr esrequest;
3367     const char *ext_name = "unknown";
3368
3369     Z_ExtendedServicesRequest *req =
3370         reqb->apdu_request->u.extendedServicesRequest;
3371     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3372
3373     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3374
3375     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3376     esrequest.stream = assoc->encode;
3377     esrequest.decode = assoc->decode;
3378     esrequest.print = assoc->print;
3379     esrequest.errcode = 0;
3380     esrequest.errstring = NULL;
3381     esrequest.request = reqb;
3382     esrequest.association = assoc;
3383     esrequest.taskPackage = 0;
3384     esrequest.referenceId = req->referenceId;
3385
3386
3387     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3388     {
3389         switch(esrequest.esr->taskSpecificParameters->which)
3390         {
3391         case Z_External_itemOrder:
3392             ext_name = "ItemOrder"; break;
3393         case Z_External_update:
3394             ext_name = "Update"; break;
3395         case Z_External_update0:
3396             ext_name = "Update0"; break;
3397         case Z_External_ESAdmin:
3398             ext_name = "Admin"; break;
3399
3400         }
3401     }
3402
3403     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3404
3405     /* If the response is being delayed, return NULL */
3406     if (esrequest.request == NULL)
3407         return(NULL);
3408
3409     resp->referenceId = req->referenceId;
3410
3411     if (esrequest.errcode == -1)
3412     {
3413         /* Backend service indicates request will be processed */
3414         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3415         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3416     }
3417     else if (esrequest.errcode == 0)
3418     {
3419         /* Backend service indicates request will be processed */
3420         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3421         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3422     }
3423     else
3424     {
3425         Z_DiagRecs *diagRecs =
3426             zget_DiagRecs(assoc->encode, esrequest.errcode,
3427                           esrequest.errstring);
3428         /* Backend indicates error, request will not be processed */
3429         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3430         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3431         resp->num_diagnostics = diagRecs->num_diagRecs;
3432         resp->diagnostics = diagRecs->diagRecs;
3433         if (log_request)
3434         {
3435             WRBUF wr = wrbuf_alloc();
3436             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3437             yaz_log(log_request, "EsRequest %s", wrbuf_buf(wr) );
3438             wrbuf_free(wr, 1);
3439         }
3440
3441     }
3442     /* Do something with the members of bend_extendedservice */
3443     if (esrequest.taskPackage)
3444         resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED,
3445                                          (const char *)  esrequest.taskPackage,
3446                                           -1);
3447     yaz_log(YLOG_DEBUG,"Send the result apdu");
3448     return apdu;
3449 }
3450
3451 /*
3452  * Local variables:
3453  * c-basic-offset: 4
3454  * indent-tabs-mode: nil
3455  * End:
3456  * vim: shiftwidth=4 tabstop=8 expandtab
3457  */
3458