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 1.97 2006-09-01 12:40:44 adam Exp $
   6  */
   7 /**
   8  * \file seshigh.c
   9  * \brief Implements GFS session logic.
  10  *
  11  * Frontend server logic.
  12  *
  13  * This code receives incoming APDUs, and handles client requests by means
  14  * of the backend API.
  15  *
  16  * Some of the code is getting quite involved, compared to simpler servers -
  17  * primarily because it is asynchronous both in the communication with
  18  * the user and the backend. We think the complexity will pay off in
  19  * the form of greater flexibility when more asynchronous facilities
  20  * are implemented.
  21  *
  22  * Memory management has become somewhat involved. In the simple case, where
  23  * only one PDU is pending at a time, it will simply reuse the same memory,
  24  * once it has found its working size. When we enable multiple concurrent
  25  * operations, perhaps even with multiple parallel calls to the backend, it
  26  * will maintain a pool of buffers for encoding and decoding, trying to
  27  * minimize memory allocation/deallocation during normal operation.
  28  *
  29  */
  30
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <assert.h>
  34 #include <ctype.h>
  35
  36 #if HAVE_SYS_TYPES_H
  37 #include <sys/types.h>
  38 #endif
  39 #if HAVE_SYS_STAT_H
  40 #include <sys/stat.h>
  41 #endif
  42
  43 #ifdef WIN32
  44 #include <io.h>
  45 #define S_ISREG(x) (x & _S_IFREG)
  46 #include <process.h>
  47 #endif
  48
  49 #if HAVE_UNISTD_H
  50 #include <unistd.h>
  51 #endif
  52
  53 #if YAZ_HAVE_XML2
  54 #include <libxml/parser.h>
  55 #include <libxml/tree.h>
  56 #endif
  57
  58 #include <yaz/yconfig.h>
  59 #include <yaz/xmalloc.h>
  60 #include <yaz/comstack.h>
  61 #include "eventl.h"
  62 #include "session.h"
  63 #include "mime.h"
  64 #include <yaz/proto.h>
  65 #include <yaz/oid.h>
  66 #include <yaz/log.h>
  67 #include <yaz/logrpn.h>
  68 #include <yaz/querytowrbuf.h>
  69 #include <yaz/statserv.h>
  70 #include <yaz/diagbib1.h>
  71 #include <yaz/charneg.h>
  72 #include <yaz/otherinfo.h>
  73 #include <yaz/yaz-util.h>
  74 #include <yaz/pquery.h>
  75
  76 #include <yaz/srw.h>
  77 #include <yaz/backend.h>
  78
  79 static void process_gdu_request(association *assoc, request *req);
  80 static int process_z_request(association *assoc, request *req, char **msg);
  81 void backend_response(IOCHAN i, int event);
  82 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  83 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  84 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  85 static Z_External *init_diagnostics(ODR odr, int errcode,
  86                                     const char *errstring);
  87 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
  88     int *fd);
  89 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  90     bend_search_rr *bsrr, int *fd);
  91 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
  92     int *fd);
  93 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
  94 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
  95 static void process_close(association *assoc, request *reqb);
  96 void save_referenceId (request *reqb, Z_ReferenceId *refid);
  97 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
  98     int *fd);
  99 static Z_APDU *process_segmentRequest (association *assoc, request *reqb);
 100
 101 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
 102
 103 /* dynamic logging levels */
 104 static int logbits_set = 0;
 105 static int log_session = 0; /* one-line logs for session */
 106 static int log_sessiondetail = 0; /* more detailed stuff */
 107 static int log_request = 0; /* one-line logs for requests */
 108 static int log_requestdetail = 0;  /* more detailed stuff */
 109
 110 /** get_logbits sets global loglevel bits */
 111 static void get_logbits()
 112 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 113     if (!logbits_set)
 114     {
 115         logbits_set = 1;
 116         log_session = yaz_log_module_level("session");
 117         log_sessiondetail = yaz_log_module_level("sessiondetail");
 118         log_request = yaz_log_module_level("request");
 119         log_requestdetail = yaz_log_module_level("requestdetail");
 120     }
 121 }
 122
 123
 124
 125 static void wr_diag(WRBUF w, int error, const char *addinfo)
 126 {
 127     wrbuf_printf(w, "ERROR %d+", error);
 128     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
 129     if (addinfo){
 130         wrbuf_puts(w, "+");
 131         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
 132     }
 133
 134     wrbuf_puts(w, " ");
 135 }
 136
 137
 138 /*
 139  * Create and initialize a new association-handle.
 140  *  channel  : iochannel for the current line.
 141  *  link     : communications channel.
 142  * Returns: 0 or a new association handle.
 143  */
 144 association *create_association(IOCHAN channel, COMSTACK link,
 145                                 const char *apdufile)
 146 {
 147     association *anew;
 148
 149     if (!logbits_set)
 150         get_logbits();
 151     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 152         return 0;
 153     anew->init = 0;
 154     anew->version = 0;
 155     anew->last_control = 0;
 156     anew->client_chan = channel;
 157     anew->client_link = link;
 158     anew->cs_get_mask = 0;
 159     anew->cs_put_mask = 0;
 160     anew->cs_accept_mask = 0;
 161     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 162         !(anew->encode = odr_createmem(ODR_ENCODE)))
 163         return 0;
 164     if (apdufile && *apdufile)
 165     {
 166         FILE *f;
 167
 168         if (!(anew->print = odr_createmem(ODR_PRINT)))
 169             return 0;
 170         if (*apdufile == '@')
 171         {
 172             odr_setprint(anew->print, yaz_log_file());
 173         }
 174         else if (*apdufile != '-')
 175         {
 176             char filename[256];
 177             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 178             if (!(f = fopen(filename, "w")))
 179             {
 180                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 181                 return 0;
 182             }
 183             setvbuf(f, 0, _IONBF, 0);
 184             odr_setprint(anew->print, f);
 185         }
 186     }
 187     else
 188         anew->print = 0;
 189     anew->input_buffer = 0;
 190     anew->input_buffer_len = 0;
 191     anew->backend = 0;
 192     anew->state = ASSOC_NEW;
 193     request_initq(&anew->incoming);
 194     request_initq(&anew->outgoing);
 195     anew->proto = cs_getproto(link);
 196     anew->server = 0;
 197     return anew;
 198 }
 199
 200 /*
 201  * Free association and release resources.
 202  */
 203 void destroy_association(association *h)
 204 {
 205     statserv_options_block *cb = statserv_getcontrol();
 206     request *req;
 207
 208     xfree(h->init);
 209     odr_destroy(h->decode);
 210     odr_destroy(h->encode);
 211     if (h->print)
 212         odr_destroy(h->print);
 213     if (h->input_buffer)
 214     xfree(h->input_buffer);
 215     if (h->backend)
 216         (*cb->bend_close)(h->backend);
 217     while ((req = request_deq(&h->incoming)))
 218         request_release(req);
 219     while ((req = request_deq(&h->outgoing)))
 220         request_release(req);
 221     request_delq(&h->incoming);
 222     request_delq(&h->outgoing);
 223     xfree(h);
 224     xmalloc_trav("session closed");
 225     if (cb && cb->one_shot)
 226     {
 227         exit (0);
 228     }
 229 }
 230
 231 static void do_close_req(association *a, int reason, char *message,
 232                          request *req)
 233 {
 234     Z_APDU apdu;
 235     Z_Close *cls = zget_Close(a->encode);
 236
 237     /* Purge request queue */
 238     while (request_deq(&a->incoming));
 239     while (request_deq(&a->outgoing));
 240     if (a->version >= 3)
 241     {
 242         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 243             reason, message ? message : "none");
 244         apdu.which = Z_APDU_close;
 245         apdu.u.close = cls;
 246         *cls->closeReason = reason;
 247         cls->diagnosticInformation = message;
 248         process_z_response(a, req, &apdu);
 249         iochan_settimeout(a->client_chan, 20);
 250     }
 251     else
 252     {
 253         request_release(req);
 254         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 255         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 256         a->cs_put_mask = 0;
 257     }
 258     a->state = ASSOC_DEAD;
 259 }
 260
 261 static void do_close(association *a, int reason, char *message)
 262 {
 263     request *req = request_get(&a->outgoing);
 264     do_close_req (a, reason, message, req);
 265 }
 266
 267 /*
 268  * This is where PDUs from the client are read and the further
 269  * processing is initiated. Flow of control moves down through the
 270  * various process_* functions below, until the encoded result comes back up
 271  * to the output handler in here.
 272  *
 273  *  h     : the I/O channel that has an outstanding event.
 274  *  event : the current outstanding event.
 275  */
 276 void ir_session(IOCHAN h, int event)
 277 {
 278     int res;
 279     association *assoc = (association *)iochan_getdata(h);
 280     COMSTACK conn = assoc->client_link;
 281     request *req;
 282
 283     assert(h && conn && assoc);
 284     if (event == EVENT_TIMEOUT)
 285     {
 286         if (assoc->state != ASSOC_UP)
 287         {
 288             yaz_log(YLOG_DEBUG, "Final timeout - closing connection.");
 289             /* do we need to lod this at all */
 290             cs_close(conn);
 291             destroy_association(assoc);
 292             iochan_destroy(h);
 293         }
 294         else
 295         {
 296             yaz_log(log_sessiondetail,
 297                     "Session idle too long. Sending close.");
 298             do_close(assoc, Z_Close_lackOfActivity, 0);
 299         }
 300         return;
 301     }
 302     if (event & assoc->cs_accept_mask)
 303     {
 304         if (!cs_accept (conn))
 305         {
 306             yaz_log (YLOG_WARN, "accept failed");
 307             destroy_association(assoc);
 308             iochan_destroy(h);
 309         }
 310         iochan_clearflag (h, EVENT_OUTPUT);
 311         if (conn->io_pending)
 312         {   /* cs_accept didn't complete */
 313             assoc->cs_accept_mask =
 314                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 315                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 316
 317             iochan_setflag (h, assoc->cs_accept_mask);
 318         }
 319         else
 320         {   /* cs_accept completed. Prepare for reading (cs_get) */
 321             assoc->cs_accept_mask = 0;
 322             assoc->cs_get_mask = EVENT_INPUT;
 323             iochan_setflag (h, assoc->cs_get_mask);
 324         }
 325         return;
 326     }
 327     if ((event & assoc->cs_get_mask) || (event & EVENT_WORK)) /* input */
 328     {
 329         if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 330         {
 331             yaz_log(YLOG_DEBUG, "ir_session (input)");
 332             /* We aren't speaking to this fellow */
 333             if (assoc->state == ASSOC_DEAD)
 334             {
 335                 yaz_log(log_sessiondetail, "Connection closed - end of session");
 336                 cs_close(conn);
 337                 destroy_association(assoc);
 338                 iochan_destroy(h);
 339                 return;
 340             }
 341             assoc->cs_get_mask = EVENT_INPUT;
 342             res = cs_get(conn, &assoc->input_buffer,
 343                 &assoc->input_buffer_len);
 344             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 345             {
 346                 yaz_log(log_session, "Connection error: %s res=%d",
 347                         cs_errmsg(cs_errno(conn)), res);
 348                 req = request_get(&assoc->incoming); /* get a new request */
 349                 do_close_req(assoc, Z_Close_protocolError,
 350                              "Incoming package too large", req);
 351                 return;
 352             }
 353             else if (res <= 0)
 354             {
 355                 yaz_log(log_sessiondetail, "Connection closed by client");
 356                 cs_close(conn);
 357                 destroy_association(assoc);
 358                 iochan_destroy(h);
 359                 return;
 360             }
 361             else if (res == 1) /* incomplete read - wait for more  */
 362             {
 363                 if (conn->io_pending & CS_WANT_WRITE)
 364                     assoc->cs_get_mask |= EVENT_OUTPUT;
 365                 iochan_setflag(h, assoc->cs_get_mask);
 366                 return;
 367             }
 368             if (cs_more(conn)) /* more stuff - call us again later, please */
 369                 iochan_setevent(h, EVENT_INPUT);
 370
 371             /* we got a complete PDU. Let's decode it */
 372             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 373                             assoc->input_buffer[0] & 0xff,
 374                             assoc->input_buffer[1] & 0xff,
 375                             assoc->input_buffer[2] & 0xff);
 376             req = request_get(&assoc->incoming); /* get a new request */
 377             odr_reset(assoc->decode);
 378             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 379             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 380             {
 381                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 382                         "[near byte %ld] ",
 383                         odr_errmsg(odr_geterror(assoc->decode)),
 384                         odr_getelement(assoc->decode),
 385                         (long) odr_offset(assoc->decode));
 386                 if (assoc->decode->error != OHTTP)
 387                 {
 388                     yaz_log(YLOG_WARN, "PDU dump:");
 389                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 390                     request_release(req);
 391                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 392                 }
 393                 else
 394                 {
 395                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 396                     assoc->state = ASSOC_DEAD;
 397                     process_gdu_response(assoc, req, p);
 398                 }
 399                 return;
 400             }
 401             req->request_mem = odr_extract_mem(assoc->decode);
 402             if (assoc->print)
 403             {
 404                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 405                     yaz_log(YLOG_WARN, "ODR print error: %s",
 406                        odr_errmsg(odr_geterror(assoc->print)));
 407                 odr_reset(assoc->print);
 408             }
 409             request_enq(&assoc->incoming, req);
 410         }
 411
 412         /* can we do something yet? */
 413         req = request_head(&assoc->incoming);
 414         if (req->state == REQUEST_IDLE)
 415         {
 416             request_deq(&assoc->incoming);
 417             process_gdu_request(assoc, req);
 418         }
 419     }
 420     if (event & assoc->cs_put_mask)
 421     {
 422         request *req = request_head(&assoc->outgoing);
 423
 424         assoc->cs_put_mask = 0;
 425         yaz_log(YLOG_DEBUG, "ir_session (output)");
 426         req->state = REQUEST_PENDING;
 427         switch (res = cs_put(conn, req->response, req->len_response))
 428         {
 429         case -1:
 430             yaz_log(log_sessiondetail, "Connection closed by client");
 431             cs_close(conn);
 432             destroy_association(assoc);
 433             iochan_destroy(h);
 434             break;
 435         case 0: /* all sent - release the request structure */
 436             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 437 #if 0
 438             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 439                     req->response);
 440 #endif
 441             nmem_destroy(req->request_mem);
 442             request_deq(&assoc->outgoing);
 443             request_release(req);
 444             if (!request_head(&assoc->outgoing))
 445             {   /* restore mask for cs_get operation ... */
 446                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 447                 iochan_setflag(h, assoc->cs_get_mask);
 448                 if (assoc->state == ASSOC_DEAD)
 449                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 450             }
 451             else
 452             {
 453                 assoc->cs_put_mask = EVENT_OUTPUT;
 454             }
 455             break;
 456         default:
 457             if (conn->io_pending & CS_WANT_WRITE)
 458                 assoc->cs_put_mask |= EVENT_OUTPUT;
 459             if (conn->io_pending & CS_WANT_READ)
 460                 assoc->cs_put_mask |= EVENT_INPUT;
 461             iochan_setflag(h, assoc->cs_put_mask);
 462         }
 463     }
 464     if (event & EVENT_EXCEPT)
 465     {
 466         yaz_log(YLOG_WARN, "ir_session (exception)");
 467         cs_close(conn);
 468         destroy_association(assoc);
 469         iochan_destroy(h);
 470     }
 471 }
 472
 473 static int process_z_request(association *assoc, request *req, char **msg);
 474
 475
 476 static void assoc_init_reset(association *assoc)
 477 {
 478     xfree (assoc->init);
 479     assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init));
 480
 481     assoc->init->stream = assoc->encode;
 482     assoc->init->print = assoc->print;
 483     assoc->init->auth = 0;
 484     assoc->init->referenceId = 0;
 485     assoc->init->implementation_version = 0;
 486     assoc->init->implementation_id = 0;
 487     assoc->init->implementation_name = 0;
 488     assoc->init->bend_sort = NULL;
 489     assoc->init->bend_search = NULL;
 490     assoc->init->bend_present = NULL;
 491     assoc->init->bend_esrequest = NULL;
 492     assoc->init->bend_delete = NULL;
 493     assoc->init->bend_scan = NULL;
 494     assoc->init->bend_segment = NULL;
 495     assoc->init->bend_fetch = NULL;
 496     assoc->init->bend_explain = NULL;
 497     assoc->init->bend_srw_scan = NULL;
 498     assoc->init->bend_srw_update = NULL;
 499
 500     assoc->init->charneg_request = NULL;
 501     assoc->init->charneg_response = NULL;
 502
 503     assoc->init->decode = assoc->decode;
 504     assoc->init->peer_name =
 505         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
 506
 507     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 508 }
 509
 510 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 511 {
 512     statserv_options_block *cb = statserv_getcontrol();
 513     if (!assoc->init)
 514     {
 515         const char *encoding = "UTF-8";
 516         Z_External *ce;
 517         bend_initresult *binitres;
 518
 519         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 520         assoc_init_reset(assoc);
 521
 522         assoc->maximumRecordSize = 3000000;
 523         assoc->preferredMessageSize = 3000000;
 524
 525         if (sr->username)
 526         {
 527             Z_IdAuthentication *auth = odr_malloc(assoc->decode, sizeof(*auth));
 528             int len;
 529
 530             len = strlen(sr->username) + 1;
 531             if (sr->password)
 532                 len += strlen(sr->password) + 2;
 533             auth->which = Z_IdAuthentication_open;
 534             auth->u.open = odr_malloc(assoc->decode, len);
 535             strcpy(auth->u.open, sr->username);
 536             if (sr->password && *sr->password)
 537             {
 538                 strcat(auth->u.open, "/");
 539                 strcat(auth->u.open, sr->password);
 540             }
 541             assoc->init->auth = auth;
 542         }
 543
 544 #if 1
 545         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 546         assoc->init->charneg_request = ce->u.charNeg3;
 547 #endif
 548         assoc->backend = 0;
 549         if (!(binitres = (*cb->bend_init)(assoc->init)))
 550         {
 551             assoc->state = ASSOC_DEAD;
 552             yaz_add_srw_diagnostic(assoc->encode, d, num,
 553                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 554             return 0;
 555         }
 556         assoc->backend = binitres->handle;
 557         assoc->init->auth = 0;
 558         if (binitres->errcode)
 559         {
 560             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 561             assoc->state = ASSOC_DEAD;
 562             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 563                                    binitres->errstring);
 564             return 0;
 565         }
 566         return 1;
 567     }
 568     return 1;
 569 }
 570
 571 static const char *get_esn(Z_RecordComposition *comp)
 572 {
 573     if (comp && comp->which == Z_RecordComp_complex)
 574     {
 575         if (comp->u.complex->generic
 576             && comp->u.complex->generic->elementSpec
 577             && (comp->u.complex->generic->elementSpec->which ==
 578                 Z_ElementSpec_elementSetName))
 579             return comp->u.complex->generic->elementSpec->u.elementSetName;
 580     }
 581     else if (comp && comp->which == Z_RecordComp_simple &&
 582              comp->u.simple->which == Z_ElementSetNames_generic)
 583         return comp->u.simple->u.generic;
 584     return 0;
 585 }
 586
 587 static void set_esn(Z_RecordComposition **comp_p, const char *esn, NMEM nmem)
 588 {
 589     Z_RecordComposition *comp = nmem_malloc(nmem, sizeof(*comp));
 590
 591     comp->which = Z_RecordComp_simple;
 592     comp->u.simple = nmem_malloc(nmem, sizeof(*comp->u.simple));
 593     comp->u.simple->which = Z_ElementSetNames_generic;
 594     comp->u.simple->u.generic = nmem_strdup(nmem, esn);
 595     *comp_p = comp;
 596 }
 597
 598 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 599 {
 600 #if YAZ_HAVE_XML2
 601     yaz_record_conv_t rc = 0;
 602     const char *match_schema = 0;
 603     int *match_syntax = 0;
 604
 605     if (assoc->server)
 606     {
 607         int r;
 608         const char *input_schema = get_esn(rr->comp);
 609         Odr_oid *input_syntax_raw = rr->request_format_raw;
 610
 611         const char *backend_schema = 0;
 612         Odr_oid *backend_syntax = 0;
 613
 614         r = yaz_retrieval_request(assoc->server->retrieval,
 615                                   input_schema,
 616                                   input_syntax_raw,
 617                                   &match_schema,
 618                                   &match_syntax,
 619                                   &rc,
 620                                   &backend_schema,
 621                                   &backend_syntax);
 622         if (r == -1) /* error ? */
 623         {
 624             const char *details = yaz_retrieval_get_error(
 625                 assoc->server->retrieval);
 626
 627             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 628             if (details)
 629                 rr->errstring = odr_strdup(rr->stream, details);
 630             return -1;
 631         }
 632         else if (r == 1 || r == 3)
 633         {
 634             const char *details = input_schema;
 635             rr->errcode =  YAZ_BIB1_ELEMENT_SET_NAMES_UNSUPP;
 636             if (details)
 637                 rr->errstring = odr_strdup(rr->stream, details);
 638             return -1;
 639         }
 640         else if (r == 2)
 641         {
 642             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 643             if (input_syntax_raw)
 644             {
 645                 char oidbuf[OID_STR_MAX];
 646                 oid_to_dotstring(input_syntax_raw, oidbuf);
 647                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 648             }
 649             return -1;
 650         }
 651         if (backend_schema)
 652         {
 653             set_esn(&rr->comp, backend_schema, rr->stream->mem);
 654         }
 655         if (backend_syntax)
 656         {
 657             oident *oident_syntax = oid_getentbyoid(backend_syntax);
 658
 659             rr->request_format_raw = backend_syntax;
 660
 661             if (oident_syntax)
 662                 rr->request_format = oident_syntax->value;
 663             else
 664                 rr->request_format = VAL_NONE;
 665         }
 666     }
 667     (*assoc->init->bend_fetch)(assoc->backend, rr);
 668     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
 669     {   /* post conversion must take place .. */
 670         WRBUF output_record = wrbuf_alloc();
 671         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 672         if (r)
 673         {
 674             const char *details = yaz_record_conv_get_error(rc);
 675             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 676             if (details)
 677                 rr->errstring = odr_strdup(rr->stream, details);
 678         }
 679         else
 680         {
 681             rr->len = wrbuf_len(output_record);
 682             rr->record = odr_malloc(rr->stream, rr->len);
 683             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 684         }
 685         wrbuf_free(output_record, 1);
 686     }
 687     if (match_syntax)
 688     {
 689         struct oident *oi = oid_getentbyoid(match_syntax);
 690         rr->output_format = oi ? oi->value : VAL_NONE;
 691         rr->output_format_raw = match_syntax;
 692     }
 693     if (match_schema)
 694         rr->schema = odr_strdup(rr->stream, match_schema);
 695     return 0;
 696 #else
 697     (*assoc->init->bend_fetch)(assoc->backend, rr);
 698 #endif
 699 }
 700
 701 static int srw_bend_fetch(association *assoc, int pos,
 702                           Z_SRW_searchRetrieveRequest *srw_req,
 703                           Z_SRW_record *record,
 704                           const char **addinfo)
 705 {
 706     bend_fetch_rr rr;
 707     ODR o = assoc->encode;
 708
 709     rr.setname = "default";
 710     rr.number = pos;
 711     rr.referenceId = 0;
 712     rr.request_format = VAL_TEXT_XML;
 713     rr.request_format_raw = yaz_oidval_to_z3950oid(assoc->decode,
 714                                                    CLASS_RECSYN,
 715                                                    VAL_TEXT_XML);
 716     rr.comp = (Z_RecordComposition *)
 717             odr_malloc(assoc->decode, sizeof(*rr.comp));
 718     rr.comp->which = Z_RecordComp_complex;
 719     rr.comp->u.complex = (Z_CompSpec *)
 720             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 721     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 722         odr_malloc(assoc->encode, sizeof(bool_t));
 723     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 724     rr.comp->u.complex->num_dbSpecific = 0;
 725     rr.comp->u.complex->dbSpecific = 0;
 726     rr.comp->u.complex->num_recordSyntax = 0;
 727     rr.comp->u.complex->recordSyntax = 0;
 728
 729     rr.comp->u.complex->generic = (Z_Specification *)
 730             odr_malloc(assoc->decode, sizeof(Z_Specification));
 731
 732     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 733     rr.comp->u.complex->generic->which = Z_Schema_uri;
 734     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 735
 736     /* ESN = recordSchema if recordSchema is present */
 737     rr.comp->u.complex->generic->elementSpec = 0;
 738     if (srw_req->recordSchema)
 739     {
 740         rr.comp->u.complex->generic->elementSpec =
 741             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 742         rr.comp->u.complex->generic->elementSpec->which =
 743             Z_ElementSpec_elementSetName;
 744         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 745             srw_req->recordSchema;
 746     }
 747
 748     rr.stream = assoc->encode;
 749     rr.print = assoc->print;
 750
 751     rr.basename = 0;
 752     rr.len = 0;
 753     rr.record = 0;
 754     rr.last_in_set = 0;
 755     rr.errcode = 0;
 756     rr.errstring = 0;
 757     rr.surrogate_flag = 0;
 758     rr.schema = srw_req->recordSchema;
 759
 760     if (!assoc->init->bend_fetch)
 761         return 1;
 762
 763     retrieve_fetch(assoc, &rr);
 764
 765     if (rr.errcode && rr.surrogate_flag)
 766     {
 767         int code = yaz_diag_bib1_to_srw(rr.errcode);
 768         const char *message = yaz_diag_srw_str(code);
 769         int len = 200;
 770         if (message)
 771             len += strlen(message);
 772         if (rr.errstring)
 773             len += strlen(rr.errstring);
 774
 775         record->recordData_buf = odr_malloc(o, len);
 776
 777         sprintf(record->recordData_buf, "<diagnostic "
 778                 "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
 779                 " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
 780         if (rr.errstring)
 781             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 782                     " <details>%s</details>\n", rr.errstring);
 783         if (message)
 784             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 785                     " <message>%s</message>\n", message);
 786         sprintf(record->recordData_buf + strlen(record->recordData_buf),
 787                 "</diagnostic>\n");
 788         record->recordData_len = strlen(record->recordData_buf);
 789         record->recordPosition = odr_intdup(o, pos);
 790         record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
 791         return 0;
 792     }
 793     else if (rr.len >= 0)
 794     {
 795         record->recordData_buf = rr.record;
 796         record->recordData_len = rr.len;
 797         record->recordPosition = odr_intdup(o, pos);
 798         if (rr.schema)
 799             record->recordSchema = odr_strdup(o, rr.schema);
 800         else
 801             record->recordSchema = 0;
 802     }
 803     if (rr.errcode)
 804     {
 805         *addinfo = rr.errstring;
 806         return rr.errcode;
 807     }
 808     return 0;
 809 }
 810
 811 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 812                    Z_Query *query_result)
 813 {
 814     /* have a CQL query and  CQL to PQF transform .. */
 815     CQL_parser cp = cql_parser_create();
 816     int r;
 817     int srw_errcode = 0;
 818     const char *add = 0;
 819     char rpn_buf[5120];
 820
 821     r = cql_parser_string(cp, cql);
 822     if (r)
 823     {
 824         /* CQL syntax error */
 825         srw_errcode = 10;
 826     }
 827     if (!r)
 828     {
 829         /* Syntax OK */
 830         r = cql_transform_buf(ct,
 831                               cql_parser_result(cp),
 832                               rpn_buf, sizeof(rpn_buf)-1);
 833         if (r)
 834             srw_errcode  = cql_transform_error(ct, &add);
 835     }
 836     if (!r)
 837     {
 838         /* Syntax & transform OK. */
 839         /* Convert PQF string to Z39.50 to RPN query struct */
 840         YAZ_PQF_Parser pp = yaz_pqf_create();
 841         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 842         if (!rpnquery)
 843         {
 844             size_t off;
 845             const char *pqf_msg;
 846             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 847             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 848                     pqf_msg, code);
 849             srw_errcode = 10;
 850         }
 851         else
 852         {
 853             query_result->which = Z_Query_type_1;
 854             query_result->u.type_1 = rpnquery;
 855         }
 856         yaz_pqf_destroy(pp);
 857     }
 858     cql_parser_destroy(cp);
 859     return srw_errcode;
 860 }
 861
 862 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 863                         Z_AttributesPlusTerm *result)
 864 {
 865     Z_Query query;
 866     Z_RPNQuery *rpn;
 867     int srw_error = cql2pqf(odr, cql, ct, &query);
 868     if (srw_error)
 869         return srw_error;
 870     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 871         return 10; /* bad query type */
 872     rpn = query.u.type_1;
 873     if (!rpn->RPNStructure)
 874         return 10; /* must be structure */
 875     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 876         return 10; /* must be simple */
 877     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 878         return 10; /* must be attributes plus term node .. */
 879     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 880            sizeof(*result));
 881     return 0;
 882 }
 883
 884 static void srw_bend_search(association *assoc, request *req,
 885                             Z_SRW_PDU *sr,
 886                             Z_SRW_searchRetrieveResponse *srw_res,
 887                             int *http_code)
 888 {
 889     int srw_error = 0;
 890     Z_External *ext;
 891     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 892
 893     *http_code = 200;
 894     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 895     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 896     if (srw_res->num_diagnostics == 0 && assoc->init)
 897     {
 898         bend_search_rr rr;
 899         rr.setname = "default";
 900         rr.replace_set = 1;
 901         rr.num_bases = 1;
 902         rr.basenames = &srw_req->database;
 903         rr.referenceId = 0;
 904         rr.srw_sortKeys = 0;
 905         rr.srw_setname = 0;
 906         rr.srw_setnameIdleTime = 0;
 907         rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 908         rr.query->u.type_1 = 0;
 909
 910         if (srw_req->query_type == Z_SRW_query_type_cql)
 911         {
 912             if (assoc->server && assoc->server->cql_transform)
 913             {
 914                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 915                                           assoc->server->cql_transform,
 916                                           rr.query);
 917                 if (srw_errcode)
 918                 {
 919                     yaz_add_srw_diagnostic(assoc->encode,
 920                                            &srw_res->diagnostics,
 921                                            &srw_res->num_diagnostics,
 922                                            srw_errcode, 0);
 923                 }
 924             }
 925             else
 926             {
 927                 /* CQL query to backend. Wrap it - Z39.50 style */
 928                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 929                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 930                                                         "1.2.840.10003.16.2");
 931                 ext->indirect_reference = 0;
 932                 ext->descriptor = 0;
 933                 ext->which = Z_External_CQL;
 934                 ext->u.cql = srw_req->query.cql;
 935
 936                 rr.query->which = Z_Query_type_104;
 937                 rr.query->u.type_104 =  ext;
 938             }
 939         }
 940         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 941         {
 942             Z_RPNQuery *RPNquery;
 943             YAZ_PQF_Parser pqf_parser;
 944
 945             pqf_parser = yaz_pqf_create ();
 946
 947             RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
 948                                       srw_req->query.pqf);
 949             if (!RPNquery)
 950             {
 951                 const char *pqf_msg;
 952                 size_t off;
 953                 int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
 954                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 955                         code, pqf_msg, (long) off);
 956                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 957             }
 958
 959             rr.query->which = Z_Query_type_1;
 960             rr.query->u.type_1 =  RPNquery;
 961
 962             yaz_pqf_destroy (pqf_parser);
 963         }
 964         else
 965         {
 966             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 967                                    &srw_res->num_diagnostics,
 968                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 969         }
 970         if (rr.query->u.type_1)
 971         {
 972             rr.stream = assoc->encode;
 973             rr.decode = assoc->decode;
 974             rr.print = assoc->print;
 975             rr.request = req;
 976             if ( srw_req->sort.sortKeys )
 977                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 978                                              srw_req->sort.sortKeys );
 979             rr.association = assoc;
 980             rr.fd = 0;
 981             rr.hits = 0;
 982             rr.errcode = 0;
 983             rr.errstring = 0;
 984             rr.search_info = 0;
 985             yaz_log_zquery_level(log_requestdetail,rr.query);
 986
 987             (assoc->init->bend_search)(assoc->backend, &rr);
 988             if (rr.errcode)
 989             {
 990                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 991                 {
 992                     *http_code = 404;
 993                 }
 994                 else
 995                 {
 996                     srw_error = yaz_diag_bib1_to_srw (rr.errcode);
 997                     yaz_add_srw_diagnostic(assoc->encode,
 998                                            &srw_res->diagnostics,
 999                                            &srw_res->num_diagnostics,
1000                                            srw_error, rr.errstring);
1001                 }
1002             }
1003             else
1004             {
1005                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
1006                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
1007
1008                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
1009                         start, number, rr.hits);
1010
1011                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
1012                 if (rr.srw_setname)
1013                 {
1014                     srw_res->resultSetId =
1015                         odr_strdup(assoc->encode, rr.srw_setname );
1016                     srw_res->resultSetIdleTime =
1017                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
1018                 }
1019                 if (number > 0)
1020                 {
1021                     int i;
1022
1023                     if (start > rr.hits)
1024                     {
1025                         yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1026                                                &srw_res->num_diagnostics,
1027                                                YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1028                     }
1029                     else
1030                     {
1031                         int ok = 1;
1032                         if (start + number > rr.hits)
1033                             number = rr.hits - start + 1;
1034
1035                         /* Call bend_present if defined */
1036                         if (assoc->init->bend_present)
1037                         {
1038                             bend_present_rr *bprr = (bend_present_rr*)
1039                                 odr_malloc (assoc->decode, sizeof(*bprr));
1040                             bprr->setname = "default";
1041                             bprr->start = start;
1042                             bprr->number = number;
1043                             bprr->format = VAL_TEXT_XML;
1044                             if (srw_req->recordSchema)
1045                             {
1046                                 bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1047                                         sizeof(*bprr->comp));
1048                                 bprr->comp->which = Z_RecordComp_simple;
1049                                 bprr->comp->u.simple = (Z_ElementSetNames *)
1050                                     odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1051                                 bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1052                                 bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1053                             }
1054                             else
1055                             {
1056                                 bprr->comp = 0;
1057                             }
1058                             bprr->stream = assoc->encode;
1059                             bprr->referenceId = 0;
1060                             bprr->print = assoc->print;
1061                             bprr->request = req;
1062                             bprr->association = assoc;
1063                             bprr->errcode = 0;
1064                             bprr->errstring = NULL;
1065                             (*assoc->init->bend_present)(assoc->backend, bprr);
1066
1067                             if (!bprr->request)
1068                                 return;
1069                             if (bprr->errcode)
1070                             {
1071                                 srw_error = yaz_diag_bib1_to_srw (bprr->errcode);
1072                                 yaz_add_srw_diagnostic(assoc->encode,
1073                                                        &srw_res->diagnostics,
1074                                                        &srw_res->num_diagnostics,
1075                                                        srw_error, bprr->errstring);
1076                                 ok = 0;
1077                             }
1078                         }
1079
1080                         if (ok)
1081                         {
1082                             int j = 0;
1083                             int packing = Z_SRW_recordPacking_string;
1084                             if (srw_req->recordPacking){
1085                                 if (!strcmp(srw_req->recordPacking, "xml"))
1086                                     packing = Z_SRW_recordPacking_XML;
1087                                 if (!strcmp(srw_req->recordPacking, "url"))
1088                                     packing = Z_SRW_recordPacking_URL;
1089                             }
1090                             srw_res->records = (Z_SRW_record *)
1091                                 odr_malloc(assoc->encode,
1092                                            number * sizeof(*srw_res->records));
1093
1094                             srw_res->extra_records = (Z_SRW_extra_record **)
1095                                 odr_malloc(assoc->encode,
1096                                            number*sizeof(*srw_res->extra_records));
1097
1098                             for (i = 0; i<number; i++)
1099                             {
1100                                 int errcode;
1101                                 const char *addinfo = 0;
1102
1103                                 srw_res->records[j].recordPacking = packing;
1104                                 srw_res->records[j].recordData_buf = 0;
1105                                 srw_res->extra_records[j] = 0;
1106                                 yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1107                                 errcode = srw_bend_fetch(assoc, i+start, srw_req,
1108                                                          srw_res->records + j,
1109                                                          &addinfo);
1110                                 if (errcode)
1111                                 {
1112                                     yaz_add_srw_diagnostic(assoc->encode,
1113                                                            &srw_res->diagnostics,
1114                                                            &srw_res->num_diagnostics,
1115                                                            yaz_diag_bib1_to_srw (errcode),
1116                                                            addinfo);
1117
1118                                     break;
1119                                 }
1120                                 if (srw_res->records[j].recordData_buf)
1121                                     j++;
1122                             }
1123                             srw_res->num_records = j;
1124                             if (!j)
1125                                 srw_res->records = 0;
1126                         }
1127                     }
1128                 }
1129             }
1130         }
1131     }
1132     if (log_request)
1133     {
1134         const char *querystr = "?";
1135         const char *querytype = "?";
1136         WRBUF wr = wrbuf_alloc();
1137
1138         switch (srw_req->query_type)
1139         {
1140         case Z_SRW_query_type_cql:
1141             querytype = "CQL";
1142             querystr = srw_req->query.cql;
1143             break;
1144         case Z_SRW_query_type_pqf:
1145             querytype = "PQF";
1146             querystr = srw_req->query.pqf;
1147             break;
1148         }
1149         wrbuf_printf(wr, "SRWSearch ");
1150         wrbuf_printf(wr, srw_req->database);
1151         wrbuf_printf(wr, " ");
1152         if (srw_res->num_diagnostics)
1153             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1154         else if (*http_code != 200)
1155             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1156         else if (srw_res->numberOfRecords)
1157         {
1158             wrbuf_printf(wr, "OK %d",
1159                          (srw_res->numberOfRecords ?
1160                           *srw_res->numberOfRecords : 0));
1161         }
1162         wrbuf_printf(wr, " %s %d+%d",
1163                      (srw_res->resultSetId ?
1164                       srw_res->resultSetId : "-"),
1165                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1166                      srw_res->num_records);
1167         yaz_log(log_request, "%s %s: %s", wrbuf_buf(wr), querytype, querystr);
1168         wrbuf_free(wr, 1);
1169     }
1170 }
1171
1172 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1173 {
1174 #if YAZ_HAVE_XML2
1175     xmlNodePtr ptr = rr->server_node_ptr;
1176     if (!ptr)
1177         return 0;
1178     for (ptr = ptr->children; ptr; ptr = ptr->next)
1179     {
1180         if (ptr->type != XML_ELEMENT_NODE)
1181             continue;
1182         if (!strcmp((const char *) ptr->name, "explain"))
1183         {
1184             int len;
1185             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1186             xmlChar *buf_out;
1187             char *content;
1188
1189             ptr = xmlCopyNode(ptr, 1);
1190
1191             xmlDocSetRootElement(doc, ptr);
1192
1193             xmlDocDumpMemory(doc, &buf_out, &len);
1194             content = (char*) odr_malloc(rr->stream, 1+len);
1195             memcpy(content, buf_out, len);
1196             content[len] = '\0';
1197
1198             xmlFree(buf_out);
1199             xmlFreeDoc(doc);
1200             rr->explain_buf = content;
1201             return 0;
1202         }
1203     }
1204 #endif
1205     return 0;
1206 }
1207
1208 static void srw_bend_explain(association *assoc, request *req,
1209                              Z_SRW_PDU *sr,
1210                              Z_SRW_explainResponse *srw_res,
1211                              int *http_code)
1212 {
1213     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1214     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1215     *http_code = 404;
1216     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1217     if (assoc->init)
1218     {
1219         bend_explain_rr rr;
1220
1221         rr.stream = assoc->encode;
1222         rr.decode = assoc->decode;
1223         rr.print = assoc->print;
1224         rr.explain_buf = 0;
1225         rr.database = srw_req->database;
1226         if (assoc->server)
1227             rr.server_node_ptr = assoc->server->server_node_ptr;
1228         else
1229             rr.server_node_ptr = 0;
1230         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1231         if (assoc->init->bend_explain)
1232             (*assoc->init->bend_explain)(assoc->backend, &rr);
1233         else
1234             srw_bend_explain_default(assoc->backend, &rr);
1235
1236         if (rr.explain_buf)
1237         {
1238             int packing = Z_SRW_recordPacking_string;
1239             if (srw_req->recordPacking)
1240             {
1241                 if (!strcmp(srw_req->recordPacking, "xml"))
1242                     packing = Z_SRW_recordPacking_XML;
1243                 else if (!strcmp(srw_req->recordPacking, "url"))
1244                     packing = Z_SRW_recordPacking_URL;
1245             }
1246             srw_res->record.recordSchema = rr.schema;
1247             srw_res->record.recordPacking = packing;
1248             srw_res->record.recordData_buf = rr.explain_buf;
1249             srw_res->record.recordData_len = strlen(rr.explain_buf);
1250             srw_res->record.recordPosition = 0;
1251             *http_code = 200;
1252         }
1253     }
1254 }
1255
1256 static void srw_bend_scan(association *assoc, request *req,
1257                           Z_SRW_PDU *sr,
1258                           Z_SRW_scanResponse *srw_res,
1259                           int *http_code)
1260 {
1261     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1262     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1263
1264     *http_code = 200;
1265     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1266     if (srw_res->num_diagnostics == 0 && assoc->init)
1267     {
1268         struct scan_entry *save_entries;
1269
1270         bend_scan_rr *bsrr = (bend_scan_rr *)
1271             odr_malloc (assoc->encode, sizeof(*bsrr));
1272         bsrr->num_bases = 1;
1273         bsrr->basenames = &srw_req->database;
1274
1275         bsrr->num_entries = srw_req->maximumTerms ?
1276             *srw_req->maximumTerms : 10;
1277         bsrr->term_position = srw_req->responsePosition ?
1278             *srw_req->responsePosition : 1;
1279
1280         bsrr->errcode = 0;
1281         bsrr->errstring = 0;
1282         bsrr->referenceId = 0;
1283         bsrr->stream = assoc->encode;
1284         bsrr->print = assoc->print;
1285         bsrr->step_size = odr_intdup(assoc->decode, 0);
1286         bsrr->entries = 0;
1287
1288         if (bsrr->num_entries > 0)
1289         {
1290             int i;
1291             bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1292                                        bsrr->num_entries);
1293             for (i = 0; i<bsrr->num_entries; i++)
1294             {
1295                 bsrr->entries[i].term = 0;
1296                 bsrr->entries[i].occurrences = 0;
1297                 bsrr->entries[i].errcode = 0;
1298                 bsrr->entries[i].errstring = 0;
1299                 bsrr->entries[i].display_term = 0;
1300             }
1301         }
1302         save_entries = bsrr->entries;  /* save it so we can compare later */
1303
1304         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1305             assoc->init->bend_scan)
1306         {
1307             Odr_oid *scan_attributeSet = 0;
1308             oident *attset;
1309             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1310
1311             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1312                                       &scan_attributeSet,
1313                                       srw_req->scanClause.pqf);
1314             if (scan_attributeSet &&
1315                 (attset = oid_getentbyoid(scan_attributeSet)) &&
1316                 (attset->oclass == CLASS_ATTSET ||
1317                  attset->oclass == CLASS_GENERAL))
1318                 bsrr->attributeset = attset->value;
1319             else
1320                 bsrr->attributeset = VAL_NONE;
1321             yaz_pqf_destroy(pqf_parser);
1322             bsrr->scanClause = 0;
1323             ((int (*)(void *, bend_scan_rr *))
1324              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1325         }
1326         else if (srw_req->query_type == Z_SRW_query_type_cql
1327                  && assoc->init->bend_scan && assoc->server
1328                  && assoc->server->cql_transform)
1329         {
1330             int srw_error;
1331             bsrr->scanClause = 0;
1332             bsrr->attributeset = VAL_NONE;
1333             bsrr->term = odr_malloc(assoc->decode, sizeof(*bsrr->term));
1334             srw_error = cql2pqf_scan(assoc->encode,
1335                                      srw_req->scanClause.cql,
1336                                      assoc->server->cql_transform,
1337                                      bsrr->term);
1338             if (srw_error)
1339                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1340                                        &srw_res->num_diagnostics,
1341                                        srw_error, 0);
1342             else
1343             {
1344                 ((int (*)(void *, bend_scan_rr *))
1345                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1346             }
1347         }
1348         else if (srw_req->query_type == Z_SRW_query_type_cql
1349                  && assoc->init->bend_srw_scan)
1350         {
1351             bsrr->term = 0;
1352             bsrr->attributeset = VAL_NONE;
1353             bsrr->scanClause = srw_req->scanClause.cql;
1354             ((int (*)(void *, bend_scan_rr *))
1355              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1356         }
1357         else
1358         {
1359             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1360                                    &srw_res->num_diagnostics,
1361                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1362         }
1363         if (bsrr->errcode)
1364         {
1365             int srw_error;
1366             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1367             {
1368                 *http_code = 404;
1369                 return;
1370             }
1371             srw_error = yaz_diag_bib1_to_srw (bsrr->errcode);
1372
1373             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1374                                    &srw_res->num_diagnostics,
1375                                    srw_error, bsrr->errstring);
1376         }
1377         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1378         {
1379             int i;
1380             srw_res->terms = (Z_SRW_scanTerm*)
1381                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1382                            bsrr->num_entries);
1383
1384             srw_res->num_terms =  bsrr->num_entries;
1385             for (i = 0; i<bsrr->num_entries; i++)
1386             {
1387                 Z_SRW_scanTerm *t = srw_res->terms + i;
1388                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1389                 t->numberOfRecords =
1390                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1391                 t->displayTerm = 0;
1392                 if (save_entries == bsrr->entries &&
1393                     bsrr->entries[i].display_term)
1394                 {
1395                     /* the entries was _not_ set by the handler. So it's
1396                        safe to test for new member display_term. It is
1397                        NULL'ed by us.
1398                     */
1399                     t->displayTerm = odr_strdup(assoc->encode,
1400                                                 bsrr->entries[i].display_term);
1401                 }
1402                 t->whereInList = 0;
1403             }
1404         }
1405     }
1406     if (log_request)
1407     {
1408         WRBUF wr = wrbuf_alloc();
1409         const char *querytype = 0;
1410         const char *querystr = 0;
1411
1412         switch(srw_req->query_type)
1413         {
1414         case Z_SRW_query_type_pqf:
1415             querytype = "PQF";
1416             querystr = srw_req->scanClause.pqf;
1417             break;
1418         case Z_SRW_query_type_cql:
1419             querytype = "CQL";
1420             querystr = srw_req->scanClause.cql;
1421             break;
1422         default:
1423             querytype = "UNKNOWN";
1424             querystr = "";
1425         }
1426
1427         wrbuf_printf(wr, "SRWScan ");
1428         wrbuf_printf(wr, srw_req->database);
1429         wrbuf_printf(wr, " ");
1430
1431         if (srw_res->num_diagnostics)
1432             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1433         else if (srw_res->num_terms)
1434             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1435         else
1436             wrbuf_printf(wr, "OK - - ");
1437
1438         wrbuf_printf(wr, "%d+%d+0 ",
1439                      (srw_req->responsePosition ?
1440                       *srw_req->responsePosition : 1),
1441                      (srw_req->maximumTerms ?
1442                       *srw_req->maximumTerms : 1));
1443         /* there is no step size in SRU/W ??? */
1444         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1445         yaz_log(log_request, "%s ", wrbuf_buf(wr) );
1446         wrbuf_free(wr, 1);
1447     }
1448
1449 }
1450
1451 static void srw_bend_update(association *assoc, request *req,
1452                             Z_SRW_PDU *sr,
1453                             Z_SRW_updateResponse *srw_res,
1454                             int *http_code)
1455 {
1456     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1457     yaz_log(YLOG_DEBUG, "Got SRW UpdateRequest");
1458     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1459     *http_code = 404;
1460     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1461     if (assoc->init)
1462     {
1463         bend_update_rr rr;
1464
1465         rr.stream = assoc->encode;
1466         rr.print = assoc->print;
1467         rr.num_bases = 1;
1468         rr.basenames = &srw_req->database;
1469         rr.operation = srw_req->operation;
1470         rr.operation_status = "failed";
1471         rr.record_id = 0;
1472         rr.record_version = 0;
1473         rr.record_checksum = 0;
1474         rr.record_old_version = 0;
1475         rr.record_packing = "xml";
1476         rr.record_schema = 0;
1477         rr.record_data = 0;
1478         rr.request_extra_record = 0;
1479         rr.response_extra_record = 0;
1480         rr.extra_request_data = 0;
1481         rr.extra_response_data = 0;
1482         rr.uri = 0;
1483         rr.message = 0;
1484         rr.details = 0;
1485
1486         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1487         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1488         if ( !strcmp( rr.operation, "delete" ) ){
1489             if ( !srw_req->recordId ){
1490                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1491                                        &srw_res->num_diagnostics,
1492                                        7, "recordId" );
1493             }
1494             else {
1495                 rr.record_id = srw_req->recordId;
1496             }
1497             if (  !srw_req->recordVersion ){
1498                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1499                                        &srw_res->num_diagnostics,
1500                                        7, "recordVersion" );
1501             }
1502             else {
1503                 rr.record_version = odr_strdup( assoc->encode,
1504                                                 srw_req->recordVersion );
1505
1506             }
1507             if ( srw_req->recordOldVersion ){
1508                 rr.record_old_version = odr_strdup(assoc->encode,
1509                                                    srw_req->recordOldVersion );
1510             }
1511             if ( srw_req->extraRequestData ){
1512                 rr.extra_request_data = odr_strdup(assoc->encode,
1513                                                    srw_req->extraRequestData );
1514             }
1515         }
1516         else if ( !strcmp( rr.operation, "replace" ) ){
1517             if ( !srw_req->recordId ){
1518                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1519                                        &srw_res->num_diagnostics,
1520                                        7, "recordId" );
1521             }
1522             else {
1523                 rr.record_id = srw_req->recordId;
1524             }
1525             if ( srw_req->record.recordSchema == 0 ){
1526                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1527                                        &srw_res->num_diagnostics,
1528                                        7, "recordSchema" );
1529             }
1530             else {
1531                 rr.record_schema = odr_strdup(assoc->encode,
1532                                               srw_req->record.recordSchema );
1533             }
1534             switch (srw_req->record.recordPacking)
1535             {
1536             case Z_SRW_recordPacking_string:
1537                 rr.record_packing = "string";
1538                 break;
1539             case Z_SRW_recordPacking_XML:
1540                 rr.record_packing = "xml";
1541                 break;
1542             case Z_SRW_recordPacking_URL:
1543                 rr.record_packing = "url";
1544                 break;
1545             }
1546             if ( srw_req->record.recordData_len ){
1547                 rr.record_data = odr_strdupn(assoc->encode,
1548                                              srw_req->record.recordData_buf,
1549                                              srw_req->record.recordData_len );
1550                 rr.request_extra_record = srw_req->extra_record;
1551             }
1552             else {
1553                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1554                                        &srw_res->num_diagnostics,
1555                                        7, "recordData" );
1556             }
1557             if (srw_req->extraRequestData)
1558                 rr.extra_request_data = odr_strdup(assoc->encode,
1559                                                    srw_req->extraRequestData );
1560         }
1561         else if ( !strcmp( rr.operation, "insert" ) )
1562         {
1563             rr.record_id = srw_req->recordId;
1564             if ( srw_req->record.recordSchema == 0 ){
1565                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1566                                        &srw_res->num_diagnostics,
1567                                        7, "recordSchema" );
1568             }
1569             else {
1570                 rr.record_schema = odr_strdup(assoc->encode,
1571                                               srw_req->record.recordSchema);
1572             }
1573             switch (srw_req->record.recordPacking)
1574             {
1575             case Z_SRW_recordPacking_string:
1576                 rr.record_packing = "string";
1577                 break;
1578             case Z_SRW_recordPacking_XML:
1579                 rr.record_packing = "xml";
1580                 break;
1581             case Z_SRW_recordPacking_URL:
1582                 rr.record_packing = "url";
1583                 break;
1584             }
1585
1586             if (srw_req->record.recordData_len)
1587             {
1588                 rr.record_data = odr_strdupn(assoc->encode,
1589                                              srw_req->record.recordData_buf,
1590                                              srw_req->record.recordData_len );
1591                 rr.request_extra_record = srw_req->extra_record;
1592             }
1593             else
1594                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1595                                        &srw_res->num_diagnostics,
1596                                        7, "recordData" );
1597             if ( srw_req->extraRequestData )
1598                 rr.extra_request_data = odr_strdup(assoc->encode,
1599                                                    srw_req->extraRequestData );
1600         }
1601         if (srw_res->num_diagnostics == 0)
1602         {
1603             if ( assoc->init->bend_srw_update)
1604                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1605             else {
1606                 yaz_log( YLOG_WARN, "Got No Update function!");
1607                 return;
1608             }
1609         }
1610
1611         if (rr.uri)
1612             yaz_add_srw_diagnostic_uri(assoc->encode,
1613                                        &srw_res->diagnostics,
1614                                        &srw_res->num_diagnostics,
1615                                        rr.uri,
1616                                        rr.message,
1617                                        rr.details);
1618         srw_res->recordId = rr.record_id;
1619         srw_res->operationStatus = rr.operation_status;
1620         srw_res->recordVersion = rr.record_version;
1621         srw_res->recordChecksum = rr.record_checksum;
1622         srw_res->extraResponseData = rr.extra_response_data;
1623         srw_res->record.recordPosition = 0;
1624         if (srw_res->num_diagnostics == 0 && rr.record_data)
1625         {
1626             srw_res->record.recordSchema = rr.record_schema;
1627             srw_res->record.recordPacking = srw_req->record.recordPacking;
1628             srw_res->record.recordData_buf = rr.record_data;
1629             srw_res->record.recordData_len = strlen(rr.record_data);
1630             srw_res->extra_record = rr.response_extra_record;
1631
1632         }
1633         else
1634             srw_res->record.recordData_len = 0;
1635         *http_code = 200;
1636     }
1637 }
1638
1639 /* check if path is OK (1); BAD (0) */
1640 static int check_path(const char *path)
1641 {
1642     if (*path != '/')
1643         return 0;
1644     if (strstr(path, ".."))
1645         return 0;
1646     return 1;
1647 }
1648
1649 static char *read_file(const char *fname, ODR o, int *sz)
1650 {
1651     char *buf;
1652     FILE *inf = fopen(fname, "rb");
1653     if (!inf)
1654         return 0;
1655
1656     fseek(inf, 0L, SEEK_END);
1657     *sz = ftell(inf);
1658     rewind(inf);
1659     buf = odr_malloc(o, *sz);
1660     fread(buf, 1, *sz, inf);
1661     fclose(inf);
1662     return buf;
1663 }
1664
1665 static void process_http_request(association *assoc, request *req)
1666 {
1667     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1668     ODR o = assoc->encode;
1669     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1670     Z_SRW_PDU *sr = 0;
1671     Z_SOAP *soap_package = 0;
1672     Z_GDU *p = 0;
1673     char *charset = 0;
1674     Z_HTTP_Response *hres = 0;
1675     int keepalive = 1;
1676     const char *stylesheet = 0; /* for now .. set later */
1677     Z_SRW_diagnostic *diagnostic = 0;
1678     int num_diagnostic = 0;
1679     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1680
1681     if (!control_association(assoc, host, 0))
1682     {
1683         p = z_get_HTTP_Response(o, 404);
1684         r = 1;
1685     }
1686     if (r == 2 && assoc->server && assoc->server->docpath
1687         && hreq->path[0] == '/'
1688         &&
1689         /* check if path is a proper prefix of documentroot */
1690         strncmp(hreq->path+1, assoc->server->docpath,
1691                 strlen(assoc->server->docpath))
1692         == 0)
1693     {
1694         if (!check_path(hreq->path))
1695         {
1696             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1697             p = z_get_HTTP_Response(o, 404);
1698         }
1699         else
1700         {
1701             int content_size = 0;
1702             char *content_buf = read_file(hreq->path+1, o, &content_size);
1703             if (!content_buf)
1704             {
1705                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1706                 p = z_get_HTTP_Response(o, 404);
1707             }
1708             else
1709             {
1710                 const char *ctype = 0;
1711                 yaz_mime_types types = yaz_mime_types_create();
1712
1713                 yaz_mime_types_add(types, "xsl", "application/xml");
1714                 yaz_mime_types_add(types, "xml", "application/xml");
1715                 yaz_mime_types_add(types, "css", "text/css");
1716                 yaz_mime_types_add(types, "html", "text/html");
1717                 yaz_mime_types_add(types, "htm", "text/html");
1718                 yaz_mime_types_add(types, "txt", "text/plain");
1719                 yaz_mime_types_add(types, "js", "application/x-javascript");
1720
1721                 yaz_mime_types_add(types, "gif", "image/gif");
1722                 yaz_mime_types_add(types, "png", "image/png");
1723                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1724                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1725
1726                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1727                 if (!ctype)
1728                 {
1729                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1730                     p = z_get_HTTP_Response(o, 404);
1731                 }
1732                 else
1733                 {
1734                     p = z_get_HTTP_Response(o, 200);
1735                     hres = p->u.HTTP_Response;
1736                     hres->content_buf = content_buf;
1737                     hres->content_len = content_size;
1738                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1739                 }
1740                 yaz_mime_types_destroy(types);
1741             }
1742         }
1743         r = 1;
1744     }
1745
1746     if (r == 2)
1747     {
1748         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1749         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1750     }
1751     if (r == 2)  /* not taken */
1752     {
1753         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1754                            &diagnostic, &num_diagnostic);
1755         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1756     }
1757     if (r == 0)  /* decode SRW/SRU OK .. */
1758     {
1759         int http_code = 200;
1760         if (sr->which == Z_SRW_searchRetrieve_request)
1761         {
1762             Z_SRW_PDU *res =
1763                 yaz_srw_get(assoc->encode, Z_SRW_searchRetrieve_response);
1764
1765             stylesheet = sr->u.request->stylesheet;
1766             if (num_diagnostic)
1767             {
1768                 res->u.response->diagnostics = diagnostic;
1769                 res->u.response->num_diagnostics = num_diagnostic;
1770             }
1771             else
1772             {
1773                 srw_bend_search(assoc, req, sr, res->u.response,
1774                                 &http_code);
1775             }
1776             if (http_code == 200)
1777                 soap_package->u.generic->p = res;
1778         }
1779         else if (sr->which == Z_SRW_explain_request)
1780         {
1781             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
1782             stylesheet = sr->u.explain_request->stylesheet;
1783             if (num_diagnostic)
1784             {
1785                 res->u.explain_response->diagnostics = diagnostic;
1786                 res->u.explain_response->num_diagnostics = num_diagnostic;
1787             }
1788             srw_bend_explain(assoc, req, sr,
1789                              res->u.explain_response, &http_code);
1790             if (http_code == 200)
1791                 soap_package->u.generic->p = res;
1792         }
1793         else if (sr->which == Z_SRW_scan_request)
1794         {
1795             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_scan_response);
1796             stylesheet = sr->u.scan_request->stylesheet;
1797             if (num_diagnostic)
1798             {
1799                 res->u.scan_response->diagnostics = diagnostic;
1800                 res->u.scan_response->num_diagnostics = num_diagnostic;
1801             }
1802             srw_bend_scan(assoc, req, sr,
1803                           res->u.scan_response, &http_code);
1804             if (http_code == 200)
1805                 soap_package->u.generic->p = res;
1806         }
1807         else if (sr->which == Z_SRW_update_request)
1808         {
1809             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_update_response);
1810             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1811             if (num_diagnostic)
1812             {
1813                 res->u.update_response->diagnostics = diagnostic;
1814                 res->u.update_response->num_diagnostics = num_diagnostic;
1815             }
1816             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1817             srw_bend_update(assoc, req, sr,
1818                             res->u.update_response, &http_code);
1819             if (http_code == 200)
1820                 soap_package->u.generic->p = res;
1821         }
1822         else
1823         {
1824             yaz_log(log_request, "SOAP ERROR");
1825             /* FIXME - what error, what query */
1826             http_code = 500;
1827             z_soap_error(assoc->encode, soap_package,
1828                          "SOAP-ENV:Client", "Bad method", 0);
1829         }
1830         if (http_code == 200 || http_code == 500)
1831         {
1832             static Z_SOAP_Handler soap_handlers[4] = {
1833 #if YAZ_HAVE_XML2
1834                 {"http://www.loc.gov/zing/srw/", 0,
1835                  (Z_SOAP_fun) yaz_srw_codec},
1836                 {"http://www.loc.gov/zing/srw/v1.0/", 0,
1837                  (Z_SOAP_fun) yaz_srw_codec},
1838                 {"http://www.loc.gov/zing/srw/update/", 0,
1839                  (Z_SOAP_fun) yaz_ucp_codec},
1840 #endif
1841                 {0, 0, 0}
1842             };
1843             char ctype[60];
1844             int ret;
1845             p = z_get_HTTP_Response(o, 200);
1846             hres = p->u.HTTP_Response;
1847
1848             if (!stylesheet && assoc->server)
1849                 stylesheet = assoc->server->stylesheet;
1850
1851             /* empty stylesheet means NO stylesheet */
1852             if (stylesheet && *stylesheet == '\0')
1853                 stylesheet = 0;
1854
1855             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1856                                        &hres->content_buf, &hres->content_len,
1857                                        soap_handlers, charset, stylesheet);
1858             hres->code = http_code;
1859
1860             strcpy(ctype, "text/xml");
1861             if (charset)
1862             {
1863                 strcat(ctype, "; charset=");
1864                 strcat(ctype, charset);
1865             }
1866             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1867         }
1868         else
1869             p = z_get_HTTP_Response(o, http_code);
1870     }
1871
1872     if (p == 0)
1873         p = z_get_HTTP_Response(o, 500);
1874     hres = p->u.HTTP_Response;
1875     if (!strcmp(hreq->version, "1.0"))
1876     {
1877         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1878         if (v && !strcmp(v, "Keep-Alive"))
1879             keepalive = 1;
1880         else
1881             keepalive = 0;
1882         hres->version = "1.0";
1883     }
1884     else
1885     {
1886         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1887         if (v && !strcmp(v, "close"))
1888             keepalive = 0;
1889         else
1890             keepalive = 1;
1891         hres->version = "1.1";
1892     }
1893     if (!keepalive)
1894     {
1895         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1896         assoc->state = ASSOC_DEAD;
1897         assoc->cs_get_mask = 0;
1898     }
1899     else
1900     {
1901         int t;
1902         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1903
1904         if (alive && isdigit(*(const unsigned char *) alive))
1905             t = atoi(alive);
1906         else
1907             t = 15;
1908         if (t < 0 || t > 3600)
1909             t = 3600;
1910         iochan_settimeout(assoc->client_chan,t);
1911         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1912     }
1913     process_gdu_response(assoc, req, p);
1914 }
1915
1916 static void process_gdu_request(association *assoc, request *req)
1917 {
1918     if (req->gdu_request->which == Z_GDU_Z3950)
1919     {
1920         char *msg = 0;
1921         req->apdu_request = req->gdu_request->u.z3950;
1922         if (process_z_request(assoc, req, &msg) < 0)
1923             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1924     }
1925     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1926         process_http_request(assoc, req);
1927     else
1928     {
1929         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1930     }
1931 }
1932
1933 /*
1934  * Initiate request processing.
1935  */
1936 static int process_z_request(association *assoc, request *req, char **msg)
1937 {
1938     int fd = -1;
1939     Z_APDU *res;
1940     int retval;
1941
1942     *msg = "Unknown Error";
1943     assert(req && req->state == REQUEST_IDLE);
1944     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1945     {
1946         *msg = "Missing InitRequest";
1947         return -1;
1948     }
1949     switch (req->apdu_request->which)
1950     {
1951     case Z_APDU_initRequest:
1952         res = process_initRequest(assoc, req); break;
1953     case Z_APDU_searchRequest:
1954         res = process_searchRequest(assoc, req, &fd); break;
1955     case Z_APDU_presentRequest:
1956         res = process_presentRequest(assoc, req, &fd); break;
1957     case Z_APDU_scanRequest:
1958         if (assoc->init->bend_scan)
1959             res = process_scanRequest(assoc, req, &fd);
1960         else
1961         {
1962             *msg = "Cannot handle Scan APDU";
1963             return -1;
1964         }
1965         break;
1966     case Z_APDU_extendedServicesRequest:
1967         if (assoc->init->bend_esrequest)
1968             res = process_ESRequest(assoc, req, &fd);
1969         else
1970         {
1971             *msg = "Cannot handle Extended Services APDU";
1972             return -1;
1973         }
1974         break;
1975     case Z_APDU_sortRequest:
1976         if (assoc->init->bend_sort)
1977             res = process_sortRequest(assoc, req, &fd);
1978         else
1979         {
1980             *msg = "Cannot handle Sort APDU";
1981             return -1;
1982         }
1983         break;
1984     case Z_APDU_close:
1985         process_close(assoc, req);
1986         return 0;
1987     case Z_APDU_deleteResultSetRequest:
1988         if (assoc->init->bend_delete)
1989             res = process_deleteRequest(assoc, req, &fd);
1990         else
1991         {
1992             *msg = "Cannot handle Delete APDU";
1993             return -1;
1994         }
1995         break;
1996     case Z_APDU_segmentRequest:
1997         if (assoc->init->bend_segment)
1998         {
1999             res = process_segmentRequest (assoc, req);
2000         }
2001         else
2002         {
2003             *msg = "Cannot handle Segment APDU";
2004             return -1;
2005         }
2006         break;
2007     case Z_APDU_triggerResourceControlRequest:
2008         return 0;
2009     default:
2010         *msg = "Bad APDU received";
2011         return -1;
2012     }
2013     if (res)
2014     {
2015         yaz_log(YLOG_DEBUG, "  result immediately available");
2016         retval = process_z_response(assoc, req, res);
2017     }
2018     else if (fd < 0)
2019     {
2020         yaz_log(YLOG_DEBUG, "  result unavailble");
2021         retval = 0;
2022     }
2023     else /* no result yet - one will be provided later */
2024     {
2025         IOCHAN chan;
2026
2027         /* Set up an I/O handler for the fd supplied by the backend */
2028
2029         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2030         req->state = REQUEST_PENDING;
2031         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2032             abort();
2033         iochan_setdata(chan, assoc);
2034         retval = 0;
2035     }
2036     return retval;
2037 }
2038
2039 /*
2040  * Handle message from the backend.
2041  */
2042 void backend_response(IOCHAN i, int event)
2043 {
2044     association *assoc = (association *)iochan_getdata(i);
2045     request *req = request_head(&assoc->incoming);
2046     Z_APDU *res;
2047     int fd;
2048
2049     yaz_log(YLOG_DEBUG, "backend_response");
2050     assert(assoc && req && req->state != REQUEST_IDLE);
2051     /* determine what it is we're waiting for */
2052     switch (req->apdu_request->which)
2053     {
2054         case Z_APDU_searchRequest:
2055             res = response_searchRequest(assoc, req, 0, &fd); break;
2056 #if 0
2057         case Z_APDU_presentRequest:
2058             res = response_presentRequest(assoc, req, 0, &fd); break;
2059         case Z_APDU_scanRequest:
2060             res = response_scanRequest(assoc, req, 0, &fd); break;
2061 #endif
2062         default:
2063             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2064             abort();
2065     }
2066     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2067     {
2068         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2069         do_close(assoc, Z_Close_systemProblem, 0);
2070         iochan_destroy(i);
2071         return;
2072     }
2073     else if (!res) /* no result yet - try again later */
2074     {
2075         yaz_log(YLOG_DEBUG, "   no result yet");
2076         iochan_setfd(i, fd); /* in case fd has changed */
2077     }
2078 }
2079
2080 /*
2081  * Encode response, and transfer the request structure to the outgoing queue.
2082  */
2083 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2084 {
2085     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2086
2087     if (assoc->print)
2088     {
2089         if (!z_GDU(assoc->print, &res, 0, 0))
2090             yaz_log(YLOG_WARN, "ODR print error: %s",
2091                 odr_errmsg(odr_geterror(assoc->print)));
2092         odr_reset(assoc->print);
2093     }
2094     if (!z_GDU(assoc->encode, &res, 0, 0))
2095     {
2096         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2097                 odr_errmsg(odr_geterror(assoc->decode)),
2098                 odr_getelement(assoc->decode));
2099         return -1;
2100     }
2101     req->response = odr_getbuf(assoc->encode, &req->len_response,
2102         &req->size_response);
2103     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2104     odr_reset(assoc->encode);
2105     req->state = REQUEST_IDLE;
2106     request_enq(&assoc->outgoing, req);
2107     /* turn the work over to the ir_session handler */
2108     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2109     assoc->cs_put_mask = EVENT_OUTPUT;
2110     /* Is there more work to be done? give that to the input handler too */
2111 #if 1
2112     if (request_head(&assoc->incoming))
2113     {
2114         yaz_log (YLOG_DEBUG, "more work to be done");
2115         iochan_setevent(assoc->client_chan, EVENT_WORK);
2116     }
2117 #endif
2118     return 0;
2119 }
2120
2121 /*
2122  * Encode response, and transfer the request structure to the outgoing queue.
2123  */
2124 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2125 {
2126     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2127     gres->which = Z_GDU_Z3950;
2128     gres->u.z3950 = res;
2129
2130     return process_gdu_response(assoc, req, gres);
2131 }
2132
2133 static char *get_vhost(Z_OtherInformation *otherInfo)
2134 {
2135     return yaz_oi_get_string_oidval(&otherInfo, VAL_PROXY, 1, 0);
2136 }
2137
2138 /*
2139  * Handle init request.
2140  * At the moment, we don't check the options
2141  * anywhere else in the code - we just try not to do anything that would
2142  * break a naive client. We'll toss 'em into the association block when
2143  * we need them there.
2144  */
2145 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2146 {
2147     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2148     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2149     Z_InitResponse *resp = apdu->u.initResponse;
2150     bend_initresult *binitres;
2151     char *version;
2152     char options[140];
2153     statserv_options_block *cb = 0;  /* by default no control for backend */
2154
2155     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2156         cb = statserv_getcontrol();  /* got control block for backend */
2157
2158     if (cb && assoc->backend)
2159         (*cb->bend_close)(assoc->backend);
2160
2161     yaz_log(log_requestdetail, "Got initRequest");
2162     if (req->implementationId)
2163         yaz_log(log_requestdetail, "Id:        %s",
2164                 req->implementationId);
2165     if (req->implementationName)
2166         yaz_log(log_requestdetail, "Name:      %s",
2167                 req->implementationName);
2168     if (req->implementationVersion)
2169         yaz_log(log_requestdetail, "Version:   %s",
2170                 req->implementationVersion);
2171
2172     assoc_init_reset(assoc);
2173
2174     assoc->init->auth = req->idAuthentication;
2175     assoc->init->referenceId = req->referenceId;
2176
2177     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2178     {
2179         Z_CharSetandLanguageNegotiation *negotiation =
2180             yaz_get_charneg_record (req->otherInfo);
2181         if (negotiation &&
2182             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2183             assoc->init->charneg_request = negotiation;
2184     }
2185
2186     assoc->backend = 0;
2187     if (cb)
2188     {
2189         if (req->implementationVersion)
2190             yaz_log(log_requestdetail, "Config:    %s",
2191                     cb->configname);
2192
2193         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2194
2195         /* we have a backend control block, so call that init function */
2196         if (!(binitres = (*cb->bend_init)(assoc->init)))
2197         {
2198             yaz_log(YLOG_WARN, "Bad response from backend.");
2199             return 0;
2200         }
2201         assoc->backend = binitres->handle;
2202     }
2203     else
2204     {
2205         /* no backend. return error */
2206         binitres = odr_malloc(assoc->encode, sizeof(*binitres));
2207         binitres->errstring = 0;
2208         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2209         iochan_settimeout(assoc->client_chan, 10);
2210     }
2211     if ((assoc->init->bend_sort))
2212         yaz_log (YLOG_DEBUG, "Sort handler installed");
2213     if ((assoc->init->bend_search))
2214         yaz_log (YLOG_DEBUG, "Search handler installed");
2215     if ((assoc->init->bend_present))
2216         yaz_log (YLOG_DEBUG, "Present handler installed");
2217     if ((assoc->init->bend_esrequest))
2218         yaz_log (YLOG_DEBUG, "ESRequest handler installed");
2219     if ((assoc->init->bend_delete))
2220         yaz_log (YLOG_DEBUG, "Delete handler installed");
2221     if ((assoc->init->bend_scan))
2222         yaz_log (YLOG_DEBUG, "Scan handler installed");
2223     if ((assoc->init->bend_segment))
2224         yaz_log (YLOG_DEBUG, "Segment handler installed");
2225
2226     resp->referenceId = req->referenceId;
2227     *options = '\0';
2228     /* let's tell the client what we can do */
2229     if (ODR_MASK_GET(req->options, Z_Options_search))
2230     {
2231         ODR_MASK_SET(resp->options, Z_Options_search);
2232         strcat(options, "srch");
2233     }
2234     if (ODR_MASK_GET(req->options, Z_Options_present))
2235     {
2236         ODR_MASK_SET(resp->options, Z_Options_present);
2237         strcat(options, " prst");
2238     }
2239     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2240         assoc->init->bend_delete)
2241     {
2242         ODR_MASK_SET(resp->options, Z_Options_delSet);
2243         strcat(options, " del");
2244     }
2245     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2246         assoc->init->bend_esrequest)
2247     {
2248         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2249         strcat (options, " extendedServices");
2250     }
2251     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2252     {
2253         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2254         strcat(options, " namedresults");
2255     }
2256     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2257     {
2258         ODR_MASK_SET(resp->options, Z_Options_scan);
2259         strcat(options, " scan");
2260     }
2261     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2262     {
2263         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2264         strcat(options, " concurrop");
2265     }
2266     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2267     {
2268         ODR_MASK_SET(resp->options, Z_Options_sort);
2269         strcat(options, " sort");
2270     }
2271
2272     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
2273         && assoc->init->charneg_response)
2274     {
2275         Z_OtherInformation **p;
2276         Z_OtherInformationUnit *p0;
2277
2278         yaz_oi_APDU(apdu, &p);
2279
2280         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
2281             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2282
2283             p0->which = Z_OtherInfo_externallyDefinedInfo;
2284             p0->information.externallyDefinedInfo =
2285                 assoc->init->charneg_response;
2286         }
2287         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2288         strcat(options, " negotiation");
2289     }
2290
2291     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2292         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2293
2294     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2295     {
2296         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2297         assoc->version = 1; /* 1 & 2 are equivalent */
2298     }
2299     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2300     {
2301         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2302         assoc->version = 2;
2303     }
2304     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2305     {
2306         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2307         assoc->version = 3;
2308     }
2309
2310     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2311     assoc->maximumRecordSize = *req->maximumRecordSize;
2312
2313     if (cb && assoc->maximumRecordSize > cb->maxrecordsize)
2314         assoc->maximumRecordSize = cb->maxrecordsize;
2315     assoc->preferredMessageSize = *req->preferredMessageSize;
2316     if (assoc->preferredMessageSize > assoc->maximumRecordSize)
2317         assoc->preferredMessageSize = assoc->maximumRecordSize;
2318
2319     resp->preferredMessageSize = &assoc->preferredMessageSize;
2320     resp->maximumRecordSize = &assoc->maximumRecordSize;
2321
2322     resp->implementationId = odr_prepend(assoc->encode,
2323                 assoc->init->implementation_id,
2324                 resp->implementationId);
2325
2326     resp->implementationName = odr_prepend(assoc->encode,
2327                 assoc->init->implementation_name,
2328                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2329
2330     version = odr_strdup(assoc->encode, "$Revision: 1.97 $");
2331     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2332         version[strlen(version)-2] = '\0';
2333     resp->implementationVersion = odr_prepend(assoc->encode,
2334                 assoc->init->implementation_version,
2335                 odr_prepend(assoc->encode, &version[11],
2336                             resp->implementationVersion));
2337
2338     if (binitres->errcode)
2339     {
2340         assoc->state = ASSOC_DEAD;
2341         resp->userInformationField =
2342             init_diagnostics(assoc->encode, binitres->errcode,
2343                              binitres->errstring);
2344         *resp->result = 0;
2345     }
2346     if (log_request)
2347     {
2348         if (!req->idAuthentication)
2349             yaz_log(log_request, "Auth none");
2350         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2351         {
2352             const char *open = req->idAuthentication->u.open;
2353             const char *slash = strchr(open, '/');
2354             int len;
2355             if (slash)
2356                 len = slash - open;
2357             else
2358                 len = strlen(open);
2359                 yaz_log(log_request, "Auth open %.*s", len, open);
2360         }
2361         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2362         {
2363             const char *user = req->idAuthentication->u.idPass->userId;
2364             const char *group = req->idAuthentication->u.idPass->groupId;
2365             yaz_log(log_request, "Auth idPass %s %s",
2366                     user ? user : "-", group ? group : "-");
2367         }
2368         else if (req->idAuthentication->which
2369                  == Z_IdAuthentication_anonymous)
2370         {
2371             yaz_log(log_request, "Auth anonymous");
2372         }
2373         else
2374         {
2375             yaz_log(log_request, "Auth other");
2376         }
2377     }
2378     if (log_request)
2379     {
2380         WRBUF wr = wrbuf_alloc();
2381         wrbuf_printf(wr, "Init ");
2382         if (binitres->errcode)
2383             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2384         else
2385             wrbuf_printf(wr, "OK -");
2386         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2387                      (req->implementationId ? req->implementationId :"-"),
2388                      (req->implementationName ?
2389                       req->implementationName : "-"),
2390                      (req->implementationVersion ?
2391                       req->implementationVersion : "-")
2392             );
2393         yaz_log(log_request, "%s", wrbuf_buf(wr));
2394         wrbuf_free(wr, 1);
2395     }
2396     return apdu;
2397 }
2398
2399 /*
2400  * Set the specified `errcode' and `errstring' into a UserInfo-1
2401  * external to be returned to the client in accordance with Z35.90
2402  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2403  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2404  */
2405 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2406 {
2407     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2408         addinfo ? " -- " : "", addinfo ? addinfo : "");
2409     return zget_init_diagnostics(odr, error, addinfo);
2410 }
2411
2412 /*
2413  * nonsurrogate diagnostic record.
2414  */
2415 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2416 {
2417     Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec));
2418
2419     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2420             addinfo ? " -- " : "", addinfo ? addinfo : "");
2421
2422     rec->which = Z_Records_NSD;
2423     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2424                                                            error, addinfo);
2425     return rec;
2426 }
2427
2428 /*
2429  * surrogate diagnostic.
2430  */
2431 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2432                                           const char *dbname,
2433                                           int error, const char *addinfo)
2434 {
2435     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2436             addinfo ? " -- " : "", addinfo ? addinfo : "");
2437     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2438 }
2439
2440 static Z_Records *pack_records(association *a, char *setname, int start,
2441                                int *num, Z_RecordComposition *comp,
2442                                int *next, int *pres, oid_value format,
2443                                Z_ReferenceId *referenceId,
2444                                int *oid, int *errcode)
2445 {
2446     int recno, total_length = 0, toget = *num, dumped_records = 0;
2447     Z_Records *records =
2448         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
2449     Z_NamePlusRecordList *reclist =
2450         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
2451     Z_NamePlusRecord **list =
2452         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
2453
2454     records->which = Z_Records_DBOSD;
2455     records->u.databaseOrSurDiagnostics = reclist;
2456     reclist->num_records = 0;
2457     reclist->records = list;
2458     *pres = Z_PresentStatus_success;
2459     *num = 0;
2460     *next = 0;
2461
2462     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2463     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2464         a->maximumRecordSize);
2465     for (recno = start; reclist->num_records < toget; recno++)
2466     {
2467         bend_fetch_rr freq;
2468         Z_NamePlusRecord *thisrec;
2469         int this_length = 0;
2470         /*
2471          * we get the number of bytes allocated on the stream before any
2472          * allocation done by the backend - this should give us a reasonable
2473          * idea of the total size of the data so far.
2474          */
2475         total_length = odr_total(a->encode) - dumped_records;
2476         freq.errcode = 0;
2477         freq.errstring = 0;
2478         freq.basename = 0;
2479         freq.len = 0;
2480         freq.record = 0;
2481         freq.last_in_set = 0;
2482         freq.setname = setname;
2483         freq.surrogate_flag = 0;
2484         freq.number = recno;
2485         freq.comp = comp;
2486         freq.request_format = format;
2487         freq.request_format_raw = oid;
2488         freq.output_format = format;
2489         freq.output_format_raw = 0;
2490         freq.stream = a->encode;
2491         freq.print = a->print;
2492         freq.referenceId = referenceId;
2493         freq.schema = 0;
2494
2495         retrieve_fetch(a, &freq);
2496
2497         *next = freq.last_in_set ? 0 : recno + 1;
2498
2499         /* backend should be able to signal whether error is system-wide
2500            or only pertaining to current record */
2501         if (freq.errcode)
2502         {
2503             if (!freq.surrogate_flag)
2504             {
2505                 char s[20];
2506                 *pres = Z_PresentStatus_failure;
2507                 /* for 'present request out of range',
2508                    set addinfo to record position if not set */
2509                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2510                                 freq.errstring == 0)
2511                 {
2512                     sprintf (s, "%d", recno);
2513                     freq.errstring = s;
2514                 }
2515                 if (errcode)
2516                     *errcode = freq.errcode;
2517                 return diagrec(a, freq.errcode, freq.errstring);
2518             }
2519             reclist->records[reclist->num_records] =
2520                 surrogatediagrec(a, freq.basename, freq.errcode,
2521                                  freq.errstring);
2522             reclist->num_records++;
2523             continue;
2524         }
2525         if (freq.record == 0)  /* no error and no record ? */
2526         {
2527             *next = 0;   /* signal end-of-set and stop */
2528             break;
2529         }
2530         if (freq.len >= 0)
2531             this_length = freq.len;
2532         else
2533             this_length = odr_total(a->encode) - total_length - dumped_records;
2534         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2535             this_length, total_length, dumped_records);
2536         if (a->preferredMessageSize > 0 &&
2537                 this_length + total_length > a->preferredMessageSize)
2538         {
2539             /* record is small enough, really */
2540             if (this_length <= a->preferredMessageSize && recno > start)
2541             {
2542                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2543                 *pres = Z_PresentStatus_partial_2;
2544                 break;
2545             }
2546             /* record can only be fetched by itself */
2547             if (this_length < a->maximumRecordSize)
2548             {
2549                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2550                 if (toget > 1)
2551                 {
2552                     yaz_log(YLOG_DEBUG, "  Dropped it");
2553                     reclist->records[reclist->num_records] =
2554                          surrogatediagrec(a, freq.basename, 16, 0);
2555                     reclist->num_records++;
2556                     dumped_records += this_length;
2557                     continue;
2558                 }
2559             }
2560             else /* too big entirely */
2561             {
2562                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2563                         this_length, a->maximumRecordSize);
2564                 reclist->records[reclist->num_records] =
2565                     surrogatediagrec(a, freq.basename, 17, 0);
2566                 reclist->num_records++;
2567                 dumped_records += this_length;
2568                 continue;
2569             }
2570         }
2571
2572         if (!(thisrec = (Z_NamePlusRecord *)
2573               odr_malloc(a->encode, sizeof(*thisrec))))
2574             return 0;
2575         if (freq.basename)
2576             thisrec->databaseName = odr_strdup(a->encode, freq.basename);
2577         else
2578             thisrec->databaseName = 0;
2579         thisrec->which = Z_NamePlusRecord_databaseRecord;
2580
2581         if (freq.output_format_raw)
2582         {
2583             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
2584             freq.output_format = ident->value;
2585         }
2586         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
2587                                                  freq.record, freq.len);
2588         if (!thisrec->u.databaseRecord)
2589             return 0;
2590         reclist->records[reclist->num_records] = thisrec;
2591         reclist->num_records++;
2592     }
2593     *num = reclist->num_records;
2594     return records;
2595 }
2596
2597 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2598     int *fd)
2599 {
2600     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2601     bend_search_rr *bsrr =
2602         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
2603
2604     yaz_log(log_requestdetail, "Got SearchRequest.");
2605     bsrr->fd = fd;
2606     bsrr->request = reqb;
2607     bsrr->association = assoc;
2608     bsrr->referenceId = req->referenceId;
2609     save_referenceId (reqb, bsrr->referenceId);
2610     bsrr->srw_sortKeys = 0;
2611     bsrr->srw_setname = 0;
2612     bsrr->srw_setnameIdleTime = 0;
2613
2614     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2615     if (req->databaseNames)
2616     {
2617         int i;
2618         for (i = 0; i < req->num_databaseNames; i++)
2619             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2620     }
2621
2622     yaz_log_zquery_level(log_requestdetail,req->query);
2623
2624     if (assoc->init->bend_search)
2625     {
2626         bsrr->setname = req->resultSetName;
2627         bsrr->replace_set = *req->replaceIndicator;
2628         bsrr->num_bases = req->num_databaseNames;
2629         bsrr->basenames = req->databaseNames;
2630         bsrr->query = req->query;
2631         bsrr->stream = assoc->encode;
2632         nmem_transfer(bsrr->stream->mem, reqb->request_mem);
2633         bsrr->decode = assoc->decode;
2634         bsrr->print = assoc->print;
2635         bsrr->hits = 0;
2636         bsrr->errcode = 0;
2637         bsrr->errstring = NULL;
2638         bsrr->search_info = NULL;
2639
2640         if (assoc->server && assoc->server->cql_transform
2641             && req->query->which == Z_Query_type_104
2642             && req->query->u.type_104->which == Z_External_CQL)
2643         {
2644             /* have a CQL query and a CQL to PQF transform .. */
2645             int srw_errcode =
2646                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2647                         assoc->server->cql_transform, bsrr->query);
2648             if (srw_errcode)
2649                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2650         }
2651         if (!bsrr->errcode)
2652             (assoc->init->bend_search)(assoc->backend, bsrr);
2653         if (!bsrr->request)  /* backend not ready with the search response */
2654             return 0;  /* should not be used any more */
2655     }
2656     else
2657     {
2658         /* FIXME - make a diagnostic for it */
2659         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2660     }
2661     return response_searchRequest(assoc, reqb, bsrr, fd);
2662 }
2663
2664 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2665
2666 /*
2667  * Prepare a searchresponse based on the backend results. We probably want
2668  * to look at making the fetching of records nonblocking as well, but
2669  * so far, we'll keep things simple.
2670  * If bsrt is null, that means we're called in response to a communications
2671  * event, and we'll have to get the response for ourselves.
2672  */
2673 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2674     bend_search_rr *bsrt, int *fd)
2675 {
2676     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2677     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2678     Z_SearchResponse *resp = (Z_SearchResponse *)
2679         odr_malloc (assoc->encode, sizeof(*resp));
2680     int *nulint = odr_intdup (assoc->encode, 0);
2681     bool_t *sr = odr_intdup(assoc->encode, 1);
2682     int *next = odr_intdup(assoc->encode, 0);
2683     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2684     int returnedrecs=0;
2685
2686     apdu->which = Z_APDU_searchResponse;
2687     apdu->u.searchResponse = resp;
2688     resp->referenceId = req->referenceId;
2689     resp->additionalSearchInfo = 0;
2690     resp->otherInfo = 0;
2691     *fd = -1;
2692     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2693     {
2694         yaz_log(YLOG_FATAL, "Bad result from backend");
2695         return 0;
2696     }
2697     else if (bsrt->errcode)
2698     {
2699         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2700         resp->resultCount = nulint;
2701         resp->numberOfRecordsReturned = nulint;
2702         resp->nextResultSetPosition = nulint;
2703         resp->searchStatus = nulint;
2704         resp->resultSetStatus = none;
2705         resp->presentStatus = 0;
2706     }
2707     else
2708     {
2709         int *toget = odr_intdup(assoc->encode, 0);
2710         int *presst = odr_intdup(assoc->encode, 0);
2711         Z_RecordComposition comp, *compp = 0;
2712
2713         yaz_log (log_requestdetail, "resultCount: %d", bsrt->hits);
2714
2715         resp->records = 0;
2716         resp->resultCount = &bsrt->hits;
2717
2718         comp.which = Z_RecordComp_simple;
2719         /* how many records does the user agent want, then? */
2720         if (bsrt->hits <= *req->smallSetUpperBound)
2721         {
2722             *toget = bsrt->hits;
2723             if ((comp.u.simple = req->smallSetElementSetNames))
2724                 compp = &comp;
2725         }
2726         else if (bsrt->hits < *req->largeSetLowerBound)
2727         {
2728             *toget = *req->mediumSetPresentNumber;
2729             if (*toget > bsrt->hits)
2730                 *toget = bsrt->hits;
2731             if ((comp.u.simple = req->mediumSetElementSetNames))
2732                 compp = &comp;
2733         }
2734         else
2735             *toget = 0;
2736
2737         if (*toget && !resp->records)
2738         {
2739             oident *prefformat;
2740             oid_value form;
2741
2742             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2743                 form = VAL_NONE;
2744             else
2745                 form = prefformat->value;
2746
2747             /* Call bend_present if defined */
2748             if (assoc->init->bend_present)
2749             {
2750                 bend_present_rr *bprr = (bend_present_rr *)
2751                     nmem_malloc (reqb->request_mem, sizeof(*bprr));
2752                 bprr->setname = req->resultSetName;
2753                 bprr->start = 1;
2754                 bprr->number = *toget;
2755                 bprr->format = form;
2756                 bprr->comp = compp;
2757                 bprr->referenceId = req->referenceId;
2758                 bprr->stream = assoc->encode;
2759                 bprr->print = assoc->print;
2760                 bprr->request = reqb;
2761                 bprr->association = assoc;
2762                 bprr->errcode = 0;
2763                 bprr->errstring = NULL;
2764                 (*assoc->init->bend_present)(assoc->backend, bprr);
2765
2766                 if (!bprr->request)
2767                     return 0;
2768                 if (bprr->errcode)
2769                 {
2770                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2771                     *resp->presentStatus = Z_PresentStatus_failure;
2772                 }
2773             }
2774
2775             if (!resp->records)
2776                 resp->records = pack_records(assoc, req->resultSetName, 1,
2777                                              toget, compp, next, presst, form, req->referenceId,
2778                                              req->preferredRecordSyntax, NULL);
2779             if (!resp->records)
2780                 return 0;
2781             resp->numberOfRecordsReturned = toget;
2782             returnedrecs = *toget;
2783             resp->nextResultSetPosition = next;
2784             resp->searchStatus = sr;
2785             resp->resultSetStatus = 0;
2786             resp->presentStatus = presst;
2787         }
2788         else
2789         {
2790             if (*resp->resultCount)
2791                 *next = 1;
2792             resp->numberOfRecordsReturned = nulint;
2793             resp->nextResultSetPosition = next;
2794             resp->searchStatus = sr;
2795             resp->resultSetStatus = 0;
2796             resp->presentStatus = 0;
2797         }
2798     }
2799     resp->additionalSearchInfo = bsrt->search_info;
2800
2801     if (log_request)
2802     {
2803         int i;
2804         WRBUF wr = wrbuf_alloc();
2805
2806         for (i = 0 ; i < req->num_databaseNames; i++){
2807             if (i)
2808                 wrbuf_printf(wr, "+");
2809             wrbuf_printf(wr, req->databaseNames[i]);
2810         }
2811         wrbuf_printf(wr, " ");
2812
2813         if (bsrt->errcode)
2814             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2815         else
2816             wrbuf_printf(wr, "OK %d", bsrt->hits);
2817         wrbuf_printf(wr, " %s 1+%d ",
2818                      req->resultSetName, returnedrecs);
2819         yaz_query_to_wrbuf(wr, req->query);
2820
2821         yaz_log(log_request, "Search %s", wrbuf_buf(wr));
2822         wrbuf_free(wr, 1);
2823     }
2824     return apdu;
2825 }
2826
2827 /*
2828  * Maybe we got a little over-friendly when we designed bend_fetch to
2829  * get only one record at a time. Some backends can optimise multiple-record
2830  * fetches, and at any rate, there is some overhead involved in
2831  * all that selecting and hopping around. Problem is, of course, that the
2832  * frontend can't know ahead of time how many records it'll need to
2833  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2834  * is downright lousy as a bulk data transfer protocol.
2835  *
2836  * To start with, we'll do the fetching of records from the backend
2837  * in one operation: To save some trips in and out of the event-handler,
2838  * and to simplify the interface to pack_records. At any rate, asynch
2839  * operation is more fun in operations that have an unpredictable execution
2840  * speed - which is normally more true for search than for present.
2841  */
2842 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2843                                       int *fd)
2844 {
2845     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2846     oident *prefformat;
2847     oid_value form;
2848     Z_APDU *apdu;
2849     Z_PresentResponse *resp;
2850     int *next;
2851     int *num;
2852     int errcode = 0;
2853     const char *errstring = 0;
2854
2855     yaz_log(log_requestdetail, "Got PresentRequest.");
2856
2857     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2858         form = VAL_NONE;
2859     else
2860         form = prefformat->value;
2861     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2862     resp->records = 0;
2863     resp->presentStatus = odr_intdup(assoc->encode, 0);
2864     if (assoc->init->bend_present)
2865     {
2866         bend_present_rr *bprr = (bend_present_rr *)
2867             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2868         bprr->setname = req->resultSetId;
2869         bprr->start = *req->resultSetStartPoint;
2870         bprr->number = *req->numberOfRecordsRequested;
2871         bprr->format = form;
2872         bprr->comp = req->recordComposition;
2873         bprr->referenceId = req->referenceId;
2874         bprr->stream = assoc->encode;
2875         bprr->print = assoc->print;
2876         bprr->request = reqb;
2877         bprr->association = assoc;
2878         bprr->errcode = 0;
2879         bprr->errstring = NULL;
2880         (*assoc->init->bend_present)(assoc->backend, bprr);
2881
2882         if (!bprr->request)
2883             return 0; /* should not happen */
2884         if (bprr->errcode)
2885         {
2886             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2887             *resp->presentStatus = Z_PresentStatus_failure;
2888             errcode = bprr->errcode;
2889             errstring = bprr->errstring;
2890         }
2891     }
2892     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2893     next = odr_intdup(assoc->encode, 0);
2894     num = odr_intdup(assoc->encode, 0);
2895
2896     apdu->which = Z_APDU_presentResponse;
2897     apdu->u.presentResponse = resp;
2898     resp->referenceId = req->referenceId;
2899     resp->otherInfo = 0;
2900
2901     if (!resp->records)
2902     {
2903         *num = *req->numberOfRecordsRequested;
2904         resp->records =
2905             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2906                          num, req->recordComposition, next,
2907                          resp->presentStatus,
2908                          form, req->referenceId, req->preferredRecordSyntax,
2909                          &errcode);
2910     }
2911     if (log_request)
2912     {
2913         WRBUF wr = wrbuf_alloc();
2914         wrbuf_printf(wr, "Present ");
2915
2916         if (*resp->presentStatus == Z_PresentStatus_failure)
2917             wrbuf_printf(wr, "ERROR %d ", errcode);
2918         else if (*resp->presentStatus == Z_PresentStatus_success)
2919             wrbuf_printf(wr, "OK -  ");
2920         else
2921             wrbuf_printf(wr, "Partial %d - ", *resp->presentStatus);
2922
2923         wrbuf_printf(wr, " %s %d+%d ",
2924                 req->resultSetId, *req->resultSetStartPoint,
2925                 *req->numberOfRecordsRequested);
2926         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2927         wrbuf_free(wr, 1);
2928     }
2929     if (!resp->records)
2930         return 0;
2931     resp->numberOfRecordsReturned = num;
2932     resp->nextResultSetPosition = next;
2933
2934     return apdu;
2935 }
2936
2937 /*
2938  * Scan was implemented rather in a hurry, and with support for only the basic
2939  * elements of the service in the backend API. Suggestions are welcome.
2940  */
2941 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2942 {
2943     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2944     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2945     Z_ScanResponse *res = (Z_ScanResponse *)
2946         odr_malloc (assoc->encode, sizeof(*res));
2947     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2948     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2949     Z_ListEntries *ents = (Z_ListEntries *)
2950         odr_malloc (assoc->encode, sizeof(*ents));
2951     Z_DiagRecs *diagrecs_p = NULL;
2952     oident *attset;
2953     bend_scan_rr *bsrr = (bend_scan_rr *)
2954         odr_malloc (assoc->encode, sizeof(*bsrr));
2955     struct scan_entry *save_entries;
2956
2957     yaz_log(log_requestdetail, "Got ScanRequest");
2958
2959     apdu->which = Z_APDU_scanResponse;
2960     apdu->u.scanResponse = res;
2961     res->referenceId = req->referenceId;
2962
2963     /* if step is absent, set it to 0 */
2964     res->stepSize = odr_intdup(assoc->encode, 0);
2965     if (req->stepSize)
2966         *res->stepSize = *req->stepSize;
2967
2968     res->scanStatus = scanStatus;
2969     res->numberOfEntriesReturned = numberOfEntriesReturned;
2970     res->positionOfTerm = 0;
2971     res->entries = ents;
2972     ents->num_entries = 0;
2973     ents->entries = NULL;
2974     ents->num_nonsurrogateDiagnostics = 0;
2975     ents->nonsurrogateDiagnostics = NULL;
2976     res->attributeSet = 0;
2977     res->otherInfo = 0;
2978
2979     if (req->databaseNames)
2980     {
2981         int i;
2982         for (i = 0; i < req->num_databaseNames; i++)
2983             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2984     }
2985     bsrr->scanClause = 0;
2986     bsrr->errcode = 0;
2987     bsrr->errstring = 0;
2988     bsrr->num_bases = req->num_databaseNames;
2989     bsrr->basenames = req->databaseNames;
2990     bsrr->num_entries = *req->numberOfTermsRequested;
2991     bsrr->term = req->termListAndStartPoint;
2992     bsrr->referenceId = req->referenceId;
2993     bsrr->stream = assoc->encode;
2994     bsrr->print = assoc->print;
2995     bsrr->step_size = res->stepSize;
2996     bsrr->entries = 0;
2997     /* For YAZ 2.0 and earlier it was the backend handler that
2998        initialized entries (member display_term did not exist)
2999        YAZ 2.0 and later sets 'entries'  and initialize all members
3000        including 'display_term'. If YAZ 2.0 or later sees that
3001        entries was modified - we assume that it is an old handler and
3002        that 'display_term' is _not_ set.
3003     */
3004     if (bsrr->num_entries > 0)
3005     {
3006         int i;
3007         bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3008                                    bsrr->num_entries);
3009         for (i = 0; i<bsrr->num_entries; i++)
3010         {
3011             bsrr->entries[i].term = 0;
3012             bsrr->entries[i].occurrences = 0;
3013             bsrr->entries[i].errcode = 0;
3014             bsrr->entries[i].errstring = 0;
3015             bsrr->entries[i].display_term = 0;
3016         }
3017     }
3018     save_entries = bsrr->entries;  /* save it so we can compare later */
3019
3020     if (req->attributeSet &&
3021         (attset = oid_getentbyoid(req->attributeSet)) &&
3022         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
3023         bsrr->attributeset = attset->value;
3024     else
3025         bsrr->attributeset = VAL_NONE;
3026     log_scan_term_level (log_requestdetail, req->termListAndStartPoint,
3027             bsrr->attributeset);
3028     bsrr->term_position = req->preferredPositionInResponse ?
3029         *req->preferredPositionInResponse : 1;
3030
3031     ((int (*)(void *, bend_scan_rr *))
3032      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3033
3034     if (bsrr->errcode)
3035         diagrecs_p = zget_DiagRecs(assoc->encode,
3036                                    bsrr->errcode, bsrr->errstring);
3037     else
3038     {
3039         int i;
3040         Z_Entry **tab = (Z_Entry **)
3041             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
3042
3043         if (bsrr->status == BEND_SCAN_PARTIAL)
3044             *scanStatus = Z_Scan_partial_5;
3045         else
3046             *scanStatus = Z_Scan_success;
3047         ents->entries = tab;
3048         ents->num_entries = bsrr->num_entries;
3049         res->numberOfEntriesReturned = &ents->num_entries;
3050         res->positionOfTerm = &bsrr->term_position;
3051         for (i = 0; i < bsrr->num_entries; i++)
3052         {
3053             Z_Entry *e;
3054             Z_TermInfo *t;
3055             Odr_oct *o;
3056
3057             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3058             if (bsrr->entries[i].occurrences >= 0)
3059             {
3060                 e->which = Z_Entry_termInfo;
3061                 e->u.termInfo = t = (Z_TermInfo *)
3062                     odr_malloc(assoc->encode, sizeof(*t));
3063                 t->suggestedAttributes = 0;
3064                 t->displayTerm = 0;
3065                 if (save_entries == bsrr->entries &&
3066                     bsrr->entries[i].display_term)
3067                 {
3068                     /* the entries was _not_ set by the handler. So it's
3069                        safe to test for new member display_term. It is
3070                        NULL'ed by us.
3071                     */
3072                     t->displayTerm = odr_strdup(assoc->encode,
3073                                                 bsrr->entries[i].display_term);
3074                 }
3075                 t->alternativeTerm = 0;
3076                 t->byAttributes = 0;
3077                 t->otherTermInfo = 0;
3078                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3079                 t->term = (Z_Term *)
3080                     odr_malloc(assoc->encode, sizeof(*t->term));
3081                 t->term->which = Z_Term_general;
3082                 t->term->u.general = o =
3083                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3084                 o->buf = (unsigned char *)
3085                     odr_malloc(assoc->encode, o->len = o->size =
3086                                strlen(bsrr->entries[i].term));
3087                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3088                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3089                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3090             }
3091             else
3092             {
3093                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3094                                                   bsrr->entries[i].errcode,
3095                                                   bsrr->entries[i].errstring);
3096                 assert (drecs->num_diagRecs == 1);
3097                 e->which = Z_Entry_surrogateDiagnostic;
3098                 assert (drecs->diagRecs[0]);
3099                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3100             }
3101         }
3102     }
3103     if (diagrecs_p)
3104     {
3105         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3106         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3107     }
3108     if (log_request)
3109     {
3110         int i;
3111         WRBUF wr = wrbuf_alloc();
3112         wrbuf_printf(wr, "Scan ");
3113         for (i = 0 ; i < req->num_databaseNames; i++){
3114             if (i)
3115                 wrbuf_printf(wr, "+");
3116             wrbuf_printf(wr, req->databaseNames[i]);
3117         }
3118         wrbuf_printf(wr, " ");
3119
3120         if (bsrr->errcode){
3121             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3122             wrbuf_printf(wr, " ");
3123         }
3124         else
3125             wrbuf_printf(wr, "OK ");
3126         /* else if (*res->scanStatus == Z_Scan_success) */
3127         /*    wrbuf_printf(wr, "OK "); */
3128         /* else */
3129         /* wrbuf_printf(wr, "Partial "); */
3130
3131         if (*res->numberOfEntriesReturned)
3132             wrbuf_printf(wr, "%d - ", *res->numberOfEntriesReturned);
3133         else
3134             wrbuf_printf(wr, "0 - ");
3135
3136         wrbuf_printf(wr, "%d+%d+%d ",
3137                      (req->preferredPositionInResponse ?
3138                       *req->preferredPositionInResponse : 1),
3139                      *req->numberOfTermsRequested,
3140                      (res->stepSize ? *res->stepSize : 1));
3141
3142         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3143                           bsrr->attributeset);
3144         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3145         wrbuf_free(wr, 1);
3146     }
3147     return apdu;
3148 }
3149
3150 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3151     int *fd)
3152 {
3153     int i;
3154     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3155     Z_SortResponse *res = (Z_SortResponse *)
3156         odr_malloc (assoc->encode, sizeof(*res));
3157     bend_sort_rr *bsrr = (bend_sort_rr *)
3158         odr_malloc (assoc->encode, sizeof(*bsrr));
3159
3160     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3161
3162     yaz_log(log_requestdetail, "Got SortRequest.");
3163
3164     bsrr->num_input_setnames = req->num_inputResultSetNames;
3165     for (i=0;i<req->num_inputResultSetNames;i++)
3166         yaz_log(log_requestdetail, "Input resultset: '%s'",
3167                 req->inputResultSetNames[i]);
3168     bsrr->input_setnames = req->inputResultSetNames;
3169     bsrr->referenceId = req->referenceId;
3170     bsrr->output_setname = req->sortedResultSetName;
3171     yaz_log(log_requestdetail, "Output resultset: '%s'",
3172                 req->sortedResultSetName);
3173     bsrr->sort_sequence = req->sortSequence;
3174        /*FIXME - dump those sequences too */
3175     bsrr->stream = assoc->encode;
3176     bsrr->print = assoc->print;
3177
3178     bsrr->sort_status = Z_SortResponse_failure;
3179     bsrr->errcode = 0;
3180     bsrr->errstring = 0;
3181
3182     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3183
3184     res->referenceId = bsrr->referenceId;
3185     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3186     res->resultSetStatus = 0;
3187     if (bsrr->errcode)
3188     {
3189         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3190                                        bsrr->errcode, bsrr->errstring);
3191         res->diagnostics = dr->diagRecs;
3192         res->num_diagnostics = dr->num_diagRecs;
3193     }
3194     else
3195     {
3196         res->num_diagnostics = 0;
3197         res->diagnostics = 0;
3198     }
3199     res->resultCount = 0;
3200     res->otherInfo = 0;
3201
3202     apdu->which = Z_APDU_sortResponse;
3203     apdu->u.sortResponse = res;
3204     if (log_request)
3205     {
3206         WRBUF wr = wrbuf_alloc();
3207         wrbuf_printf(wr, "Sort ");
3208         if (bsrr->errcode)
3209             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3210         else
3211             wrbuf_printf(wr,  "OK -");
3212         wrbuf_printf(wr, " (");
3213         for (i = 0; i<req->num_inputResultSetNames; i++)
3214         {
3215             if (i)
3216                 wrbuf_printf(wr, "+");
3217             wrbuf_printf(wr, req->inputResultSetNames[i]);
3218         }
3219         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3220
3221         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3222         wrbuf_free(wr, 1);
3223     }
3224     return apdu;
3225 }
3226
3227 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3228     int *fd)
3229 {
3230     int i;
3231     Z_DeleteResultSetRequest *req =
3232         reqb->apdu_request->u.deleteResultSetRequest;
3233     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3234         odr_malloc (assoc->encode, sizeof(*res));
3235     bend_delete_rr *bdrr = (bend_delete_rr *)
3236         odr_malloc (assoc->encode, sizeof(*bdrr));
3237     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3238
3239     yaz_log(log_requestdetail, "Got DeleteRequest.");
3240
3241     bdrr->num_setnames = req->num_resultSetList;
3242     bdrr->setnames = req->resultSetList;
3243     for (i = 0; i<req->num_resultSetList; i++)
3244         yaz_log(log_requestdetail, "resultset: '%s'",
3245                 req->resultSetList[i]);
3246     bdrr->stream = assoc->encode;
3247     bdrr->print = assoc->print;
3248     bdrr->function = *req->deleteFunction;
3249     bdrr->referenceId = req->referenceId;
3250     bdrr->statuses = 0;
3251     if (bdrr->num_setnames > 0)
3252     {
3253         bdrr->statuses = (int*)
3254             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3255                        bdrr->num_setnames);
3256         for (i = 0; i < bdrr->num_setnames; i++)
3257             bdrr->statuses[i] = 0;
3258     }
3259     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3260
3261     res->referenceId = req->referenceId;
3262
3263     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3264
3265     res->deleteListStatuses = 0;
3266     if (bdrr->num_setnames > 0)
3267     {
3268         int i;
3269         res->deleteListStatuses = (Z_ListStatuses *)
3270             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3271         res->deleteListStatuses->num = bdrr->num_setnames;
3272         res->deleteListStatuses->elements =
3273             (Z_ListStatus **)
3274             odr_malloc (assoc->encode,
3275                         sizeof(*res->deleteListStatuses->elements) *
3276                         bdrr->num_setnames);
3277         for (i = 0; i<bdrr->num_setnames; i++)
3278         {
3279             res->deleteListStatuses->elements[i] =
3280                 (Z_ListStatus *)
3281                 odr_malloc (assoc->encode,
3282                             sizeof(**res->deleteListStatuses->elements));
3283             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3284             res->deleteListStatuses->elements[i]->id =
3285                 odr_strdup (assoc->encode, bdrr->setnames[i]);
3286         }
3287     }
3288     res->numberNotDeleted = 0;
3289     res->bulkStatuses = 0;
3290     res->deleteMessage = 0;
3291     res->otherInfo = 0;
3292
3293     apdu->which = Z_APDU_deleteResultSetResponse;
3294     apdu->u.deleteResultSetResponse = res;
3295     if (log_request)
3296     {
3297         WRBUF wr = wrbuf_alloc();
3298         wrbuf_printf(wr, "Delete ");
3299         if (bdrr->delete_status)
3300             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3301         else
3302             wrbuf_printf(wr, "OK -");
3303         for (i = 0; i<req->num_resultSetList; i++)
3304             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3305         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3306         wrbuf_free(wr, 1);
3307     }
3308     return apdu;
3309 }
3310
3311 static void process_close(association *assoc, request *reqb)
3312 {
3313     Z_Close *req = reqb->apdu_request->u.close;
3314     static char *reasons[] =
3315     {
3316         "finished",
3317         "shutdown",
3318         "systemProblem",
3319         "costLimit",
3320         "resources",
3321         "securityViolation",
3322         "protocolError",
3323         "lackOfActivity",
3324         "peerAbort",
3325         "unspecified"
3326     };
3327
3328     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3329         reasons[*req->closeReason], req->diagnosticInformation ?
3330         req->diagnosticInformation : "NULL");
3331     if (assoc->version < 3) /* to make do_force respond with close */
3332         assoc->version = 3;
3333     do_close_req(assoc, Z_Close_finished,
3334                  "Association terminated by client", reqb);
3335     yaz_log(log_request,"Close OK");
3336 }
3337
3338 void save_referenceId (request *reqb, Z_ReferenceId *refid)
3339 {
3340     if (refid)
3341     {
3342         reqb->len_refid = refid->len;
3343         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
3344         memcpy (reqb->refid, refid->buf, refid->len);
3345     }
3346     else
3347     {
3348         reqb->len_refid = 0;
3349         reqb->refid = NULL;
3350     }
3351 }
3352
3353 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
3354 {
3355     process_z_response (a, req, res);
3356 }
3357
3358 bend_request bend_request_mk (bend_association a)
3359 {
3360     request *nreq = request_get (&a->outgoing);
3361     nreq->request_mem = nmem_create ();
3362     return nreq;
3363 }
3364
3365 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
3366 {
3367     Z_ReferenceId *id;
3368     if (!req->refid)
3369         return 0;
3370     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
3371     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
3372     id->len = id->size = req->len_refid;
3373     memcpy (id->buf, req->refid, req->len_refid);
3374     return id;
3375 }
3376
3377 void bend_request_destroy (bend_request *req)
3378 {
3379     nmem_destroy((*req)->request_mem);
3380     request_release(*req);
3381     *req = NULL;
3382 }
3383
3384 int bend_backend_respond (bend_association a, bend_request req)
3385 {
3386     char *msg;
3387     int r;
3388     r = process_z_request (a, req, &msg);
3389     if (r < 0)
3390         yaz_log (YLOG_WARN, "%s", msg);
3391     return r;
3392 }
3393
3394 void bend_request_setdata(bend_request r, void *p)
3395 {
3396     r->clientData = p;
3397 }
3398
3399 void *bend_request_getdata(bend_request r)
3400 {
3401     return r->clientData;
3402 }
3403
3404 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
3405 {
3406     bend_segment_rr req;
3407
3408     req.segment = reqb->apdu_request->u.segmentRequest;
3409     req.stream = assoc->encode;
3410     req.decode = assoc->decode;
3411     req.print = assoc->print;
3412     req.association = assoc;
3413
3414     (*assoc->init->bend_segment)(assoc->backend, &req);
3415
3416     return 0;
3417 }
3418
3419 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3420 {
3421     bend_esrequest_rr esrequest;
3422     const char *ext_name = "unknown";
3423
3424     Z_ExtendedServicesRequest *req =
3425         reqb->apdu_request->u.extendedServicesRequest;
3426     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3427
3428     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3429
3430     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3431     esrequest.stream = assoc->encode;
3432     esrequest.decode = assoc->decode;
3433     esrequest.print = assoc->print;
3434     esrequest.errcode = 0;
3435     esrequest.errstring = NULL;
3436     esrequest.request = reqb;
3437     esrequest.association = assoc;
3438     esrequest.taskPackage = 0;
3439     esrequest.referenceId = req->referenceId;
3440
3441
3442     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3443     {
3444         switch(esrequest.esr->taskSpecificParameters->which)
3445         {
3446         case Z_External_itemOrder:
3447             ext_name = "ItemOrder"; break;
3448         case Z_External_update:
3449             ext_name = "Update"; break;
3450         case Z_External_update0:
3451             ext_name = "Update0"; break;
3452         case Z_External_ESAdmin:
3453             ext_name = "Admin"; break;
3454
3455         }
3456     }
3457
3458     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3459
3460     /* If the response is being delayed, return NULL */
3461     if (esrequest.request == NULL)
3462         return(NULL);
3463
3464     resp->referenceId = req->referenceId;
3465
3466     if (esrequest.errcode == -1)
3467     {
3468         /* Backend service indicates request will be processed */
3469         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3470         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3471     }
3472     else if (esrequest.errcode == 0)
3473     {
3474         /* Backend service indicates request will be processed */
3475         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3476         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3477     }
3478     else
3479     {
3480         Z_DiagRecs *diagRecs =
3481             zget_DiagRecs(assoc->encode, esrequest.errcode,
3482                           esrequest.errstring);
3483         /* Backend indicates error, request will not be processed */
3484         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3485         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3486         resp->num_diagnostics = diagRecs->num_diagRecs;
3487         resp->diagnostics = diagRecs->diagRecs;
3488         if (log_request)
3489         {
3490             WRBUF wr = wrbuf_alloc();
3491             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3492             yaz_log(log_request, "EsRequest %s", wrbuf_buf(wr) );
3493             wrbuf_free(wr, 1);
3494         }
3495
3496     }
3497     /* Do something with the members of bend_extendedservice */
3498     if (esrequest.taskPackage)
3499         resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED,
3500                                          (const char *)  esrequest.taskPackage,
3501                                           -1);
3502     yaz_log(YLOG_DEBUG,"Send the result apdu");
3503     return apdu;
3504 }
3505
3506 /*
3507  * Local variables:
3508  * c-basic-offset: 4
3509  * indent-tabs-mode: nil
3510  * End:
3511  * vim: shiftwidth=4 tabstop=8 expandtab
3512  */
3513