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 1.101 2006-10-24 08:07:02 adam Exp $
   6  */
   7 /**
   8  * \file seshigh.c
   9  * \brief Implements GFS session logic.
  10  *
  11  * Frontend server logic.
  12  *
  13  * This code receives incoming APDUs, and handles client requests by means
  14  * of the backend API.
  15  *
  16  * Some of the code is getting quite involved, compared to simpler servers -
  17  * primarily because it is asynchronous both in the communication with
  18  * the user and the backend. We think the complexity will pay off in
  19  * the form of greater flexibility when more asynchronous facilities
  20  * are implemented.
  21  *
  22  * Memory management has become somewhat involved. In the simple case, where
  23  * only one PDU is pending at a time, it will simply reuse the same memory,
  24  * once it has found its working size. When we enable multiple concurrent
  25  * operations, perhaps even with multiple parallel calls to the backend, it
  26  * will maintain a pool of buffers for encoding and decoding, trying to
  27  * minimize memory allocation/deallocation during normal operation.
  28  *
  29  */
  30
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <assert.h>
  34 #include <ctype.h>
  35
  36 #if HAVE_SYS_TYPES_H
  37 #include <sys/types.h>
  38 #endif
  39 #if HAVE_SYS_STAT_H
  40 #include <sys/stat.h>
  41 #endif
  42
  43 #ifdef WIN32
  44 #include <io.h>
  45 #define S_ISREG(x) (x & _S_IFREG)
  46 #include <process.h>
  47 #endif
  48
  49 #if HAVE_UNISTD_H
  50 #include <unistd.h>
  51 #endif
  52
  53 #if YAZ_HAVE_XML2
  54 #include <libxml/parser.h>
  55 #include <libxml/tree.h>
  56 #endif
  57
  58 #include <yaz/yconfig.h>
  59 #include <yaz/xmalloc.h>
  60 #include <yaz/comstack.h>
  61 #include "eventl.h"
  62 #include "session.h"
  63 #include "mime.h"
  64 #include <yaz/proto.h>
  65 #include <yaz/oid.h>
  66 #include <yaz/log.h>
  67 #include <yaz/logrpn.h>
  68 #include <yaz/querytowrbuf.h>
  69 #include <yaz/statserv.h>
  70 #include <yaz/diagbib1.h>
  71 #include <yaz/charneg.h>
  72 #include <yaz/otherinfo.h>
  73 #include <yaz/yaz-util.h>
  74 #include <yaz/pquery.h>
  75
  76 #include <yaz/srw.h>
  77 #include <yaz/backend.h>
  78
  79 static void process_gdu_request(association *assoc, request *req);
  80 static int process_z_request(association *assoc, request *req, char **msg);
  81 void backend_response(IOCHAN i, int event);
  82 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  83 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  84 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  85 static Z_External *init_diagnostics(ODR odr, int errcode,
  86                                     const char *errstring);
  87 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
  88     int *fd);
  89 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  90     bend_search_rr *bsrr, int *fd);
  91 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
  92     int *fd);
  93 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
  94 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
  95 static void process_close(association *assoc, request *reqb);
  96 void save_referenceId (request *reqb, Z_ReferenceId *refid);
  97 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
  98     int *fd);
  99 static Z_APDU *process_segmentRequest (association *assoc, request *reqb);
 100
 101 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
 102
 103 /* dynamic logging levels */
 104 static int logbits_set = 0;
 105 static int log_session = 0; /* one-line logs for session */
 106 static int log_sessiondetail = 0; /* more detailed stuff */
 107 static int log_request = 0; /* one-line logs for requests */
 108 static int log_requestdetail = 0;  /* more detailed stuff */
 109
 110 /** get_logbits sets global loglevel bits */
 111 static void get_logbits(void)
 112 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 113     if (!logbits_set)
 114     {
 115         logbits_set = 1;
 116         log_session = yaz_log_module_level("session");
 117         log_sessiondetail = yaz_log_module_level("sessiondetail");
 118         log_request = yaz_log_module_level("request");
 119         log_requestdetail = yaz_log_module_level("requestdetail");
 120     }
 121 }
 122
 123
 124
 125 static void wr_diag(WRBUF w, int error, const char *addinfo)
 126 {
 127     wrbuf_printf(w, "ERROR %d+", error);
 128     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
 129     if (addinfo){
 130         wrbuf_puts(w, "+");
 131         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
 132     }
 133
 134     wrbuf_puts(w, " ");
 135 }
 136
 137
 138 /*
 139  * Create and initialize a new association-handle.
 140  *  channel  : iochannel for the current line.
 141  *  link     : communications channel.
 142  * Returns: 0 or a new association handle.
 143  */
 144 association *create_association(IOCHAN channel, COMSTACK link,
 145                                 const char *apdufile)
 146 {
 147     association *anew;
 148
 149     if (!logbits_set)
 150         get_logbits();
 151     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 152         return 0;
 153     anew->init = 0;
 154     anew->version = 0;
 155     anew->last_control = 0;
 156     anew->client_chan = channel;
 157     anew->client_link = link;
 158     anew->cs_get_mask = 0;
 159     anew->cs_put_mask = 0;
 160     anew->cs_accept_mask = 0;
 161     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 162         !(anew->encode = odr_createmem(ODR_ENCODE)))
 163         return 0;
 164     if (apdufile && *apdufile)
 165     {
 166         FILE *f;
 167
 168         if (!(anew->print = odr_createmem(ODR_PRINT)))
 169             return 0;
 170         if (*apdufile == '@')
 171         {
 172             odr_setprint(anew->print, yaz_log_file());
 173         }
 174         else if (*apdufile != '-')
 175         {
 176             char filename[256];
 177             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 178             if (!(f = fopen(filename, "w")))
 179             {
 180                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 181                 return 0;
 182             }
 183             setvbuf(f, 0, _IONBF, 0);
 184             odr_setprint(anew->print, f);
 185         }
 186     }
 187     else
 188         anew->print = 0;
 189     anew->input_buffer = 0;
 190     anew->input_buffer_len = 0;
 191     anew->backend = 0;
 192     anew->state = ASSOC_NEW;
 193     request_initq(&anew->incoming);
 194     request_initq(&anew->outgoing);
 195     anew->proto = cs_getproto(link);
 196     anew->server = 0;
 197     return anew;
 198 }
 199
 200 /*
 201  * Free association and release resources.
 202  */
 203 void destroy_association(association *h)
 204 {
 205     statserv_options_block *cb = statserv_getcontrol();
 206     request *req;
 207
 208     xfree(h->init);
 209     odr_destroy(h->decode);
 210     odr_destroy(h->encode);
 211     if (h->print)
 212         odr_destroy(h->print);
 213     if (h->input_buffer)
 214     xfree(h->input_buffer);
 215     if (h->backend)
 216         (*cb->bend_close)(h->backend);
 217     while ((req = request_deq(&h->incoming)))
 218         request_release(req);
 219     while ((req = request_deq(&h->outgoing)))
 220         request_release(req);
 221     request_delq(&h->incoming);
 222     request_delq(&h->outgoing);
 223     xfree(h);
 224     xmalloc_trav("session closed");
 225     if (cb && cb->one_shot)
 226     {
 227         exit (0);
 228     }
 229 }
 230
 231 static void do_close_req(association *a, int reason, char *message,
 232                          request *req)
 233 {
 234     Z_APDU apdu;
 235     Z_Close *cls = zget_Close(a->encode);
 236
 237     /* Purge request queue */
 238     while (request_deq(&a->incoming));
 239     while (request_deq(&a->outgoing));
 240     if (a->version >= 3)
 241     {
 242         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 243             reason, message ? message : "none");
 244         apdu.which = Z_APDU_close;
 245         apdu.u.close = cls;
 246         *cls->closeReason = reason;
 247         cls->diagnosticInformation = message;
 248         process_z_response(a, req, &apdu);
 249         iochan_settimeout(a->client_chan, 20);
 250     }
 251     else
 252     {
 253         request_release(req);
 254         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 255         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 256         a->cs_put_mask = 0;
 257     }
 258     a->state = ASSOC_DEAD;
 259 }
 260
 261 static void do_close(association *a, int reason, char *message)
 262 {
 263     request *req = request_get(&a->outgoing);
 264     do_close_req (a, reason, message, req);
 265 }
 266
 267 /*
 268  * This is where PDUs from the client are read and the further
 269  * processing is initiated. Flow of control moves down through the
 270  * various process_* functions below, until the encoded result comes back up
 271  * to the output handler in here.
 272  *
 273  *  h     : the I/O channel that has an outstanding event.
 274  *  event : the current outstanding event.
 275  */
 276 void ir_session(IOCHAN h, int event)
 277 {
 278     int res;
 279     association *assoc = (association *)iochan_getdata(h);
 280     COMSTACK conn = assoc->client_link;
 281     request *req;
 282
 283     assert(h && conn && assoc);
 284     if (event == EVENT_TIMEOUT)
 285     {
 286         if (assoc->state != ASSOC_UP)
 287         {
 288             yaz_log(YLOG_DEBUG, "Final timeout - closing connection.");
 289             /* do we need to lod this at all */
 290             cs_close(conn);
 291             destroy_association(assoc);
 292             iochan_destroy(h);
 293         }
 294         else
 295         {
 296             yaz_log(log_sessiondetail,
 297                     "Session idle too long. Sending close.");
 298             do_close(assoc, Z_Close_lackOfActivity, 0);
 299         }
 300         return;
 301     }
 302     if (event & assoc->cs_accept_mask)
 303     {
 304         if (!cs_accept (conn))
 305         {
 306             yaz_log (YLOG_WARN, "accept failed");
 307             destroy_association(assoc);
 308             iochan_destroy(h);
 309         }
 310         iochan_clearflag (h, EVENT_OUTPUT);
 311         if (conn->io_pending)
 312         {   /* cs_accept didn't complete */
 313             assoc->cs_accept_mask =
 314                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 315                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 316
 317             iochan_setflag (h, assoc->cs_accept_mask);
 318         }
 319         else
 320         {   /* cs_accept completed. Prepare for reading (cs_get) */
 321             assoc->cs_accept_mask = 0;
 322             assoc->cs_get_mask = EVENT_INPUT;
 323             iochan_setflag (h, assoc->cs_get_mask);
 324         }
 325         return;
 326     }
 327     if ((event & assoc->cs_get_mask) || (event & EVENT_WORK)) /* input */
 328     {
 329         if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 330         {
 331             yaz_log(YLOG_DEBUG, "ir_session (input)");
 332             /* We aren't speaking to this fellow */
 333             if (assoc->state == ASSOC_DEAD)
 334             {
 335                 yaz_log(log_sessiondetail, "Connection closed - end of session");
 336                 cs_close(conn);
 337                 destroy_association(assoc);
 338                 iochan_destroy(h);
 339                 return;
 340             }
 341             assoc->cs_get_mask = EVENT_INPUT;
 342             res = cs_get(conn, &assoc->input_buffer,
 343                 &assoc->input_buffer_len);
 344             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 345             {
 346                 yaz_log(log_session, "Connection error: %s res=%d",
 347                         cs_errmsg(cs_errno(conn)), res);
 348                 req = request_get(&assoc->incoming); /* get a new request */
 349                 do_close_req(assoc, Z_Close_protocolError,
 350                              "Incoming package too large", req);
 351                 return;
 352             }
 353             else if (res <= 0)
 354             {
 355                 yaz_log(log_sessiondetail, "Connection closed by client");
 356                 cs_close(conn);
 357                 destroy_association(assoc);
 358                 iochan_destroy(h);
 359                 return;
 360             }
 361             else if (res == 1) /* incomplete read - wait for more  */
 362             {
 363                 if (conn->io_pending & CS_WANT_WRITE)
 364                     assoc->cs_get_mask |= EVENT_OUTPUT;
 365                 iochan_setflag(h, assoc->cs_get_mask);
 366                 return;
 367             }
 368             if (cs_more(conn)) /* more stuff - call us again later, please */
 369                 iochan_setevent(h, EVENT_INPUT);
 370
 371             /* we got a complete PDU. Let's decode it */
 372             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 373                             assoc->input_buffer[0] & 0xff,
 374                             assoc->input_buffer[1] & 0xff,
 375                             assoc->input_buffer[2] & 0xff);
 376             req = request_get(&assoc->incoming); /* get a new request */
 377             odr_reset(assoc->decode);
 378             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 379             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 380             {
 381                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 382                         "[near byte %ld] ",
 383                         odr_errmsg(odr_geterror(assoc->decode)),
 384                         odr_getelement(assoc->decode),
 385                         (long) odr_offset(assoc->decode));
 386                 if (assoc->decode->error != OHTTP)
 387                 {
 388                     yaz_log(YLOG_WARN, "PDU dump:");
 389                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 390                     request_release(req);
 391                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 392                 }
 393                 else
 394                 {
 395                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 396                     assoc->state = ASSOC_DEAD;
 397                     process_gdu_response(assoc, req, p);
 398                 }
 399                 return;
 400             }
 401             req->request_mem = odr_extract_mem(assoc->decode);
 402             if (assoc->print)
 403             {
 404                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 405                     yaz_log(YLOG_WARN, "ODR print error: %s",
 406                        odr_errmsg(odr_geterror(assoc->print)));
 407                 odr_reset(assoc->print);
 408             }
 409             request_enq(&assoc->incoming, req);
 410         }
 411
 412         /* can we do something yet? */
 413         req = request_head(&assoc->incoming);
 414         if (req->state == REQUEST_IDLE)
 415         {
 416             request_deq(&assoc->incoming);
 417             process_gdu_request(assoc, req);
 418         }
 419     }
 420     if (event & assoc->cs_put_mask)
 421     {
 422         request *req = request_head(&assoc->outgoing);
 423
 424         assoc->cs_put_mask = 0;
 425         yaz_log(YLOG_DEBUG, "ir_session (output)");
 426         req->state = REQUEST_PENDING;
 427         switch (res = cs_put(conn, req->response, req->len_response))
 428         {
 429         case -1:
 430             yaz_log(log_sessiondetail, "Connection closed by client");
 431             cs_close(conn);
 432             destroy_association(assoc);
 433             iochan_destroy(h);
 434             break;
 435         case 0: /* all sent - release the request structure */
 436             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 437 #if 0
 438             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 439                     req->response);
 440 #endif
 441             nmem_destroy(req->request_mem);
 442             request_deq(&assoc->outgoing);
 443             request_release(req);
 444             if (!request_head(&assoc->outgoing))
 445             {   /* restore mask for cs_get operation ... */
 446                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 447                 iochan_setflag(h, assoc->cs_get_mask);
 448                 if (assoc->state == ASSOC_DEAD)
 449                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 450             }
 451             else
 452             {
 453                 assoc->cs_put_mask = EVENT_OUTPUT;
 454             }
 455             break;
 456         default:
 457             if (conn->io_pending & CS_WANT_WRITE)
 458                 assoc->cs_put_mask |= EVENT_OUTPUT;
 459             if (conn->io_pending & CS_WANT_READ)
 460                 assoc->cs_put_mask |= EVENT_INPUT;
 461             iochan_setflag(h, assoc->cs_put_mask);
 462         }
 463     }
 464     if (event & EVENT_EXCEPT)
 465     {
 466         yaz_log(YLOG_WARN, "ir_session (exception)");
 467         cs_close(conn);
 468         destroy_association(assoc);
 469         iochan_destroy(h);
 470     }
 471 }
 472
 473 static int process_z_request(association *assoc, request *req, char **msg);
 474
 475
 476 static void assoc_init_reset(association *assoc)
 477 {
 478     xfree (assoc->init);
 479     assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init));
 480
 481     assoc->init->stream = assoc->encode;
 482     assoc->init->print = assoc->print;
 483     assoc->init->auth = 0;
 484     assoc->init->referenceId = 0;
 485     assoc->init->implementation_version = 0;
 486     assoc->init->implementation_id = 0;
 487     assoc->init->implementation_name = 0;
 488     assoc->init->bend_sort = NULL;
 489     assoc->init->bend_search = NULL;
 490     assoc->init->bend_present = NULL;
 491     assoc->init->bend_esrequest = NULL;
 492     assoc->init->bend_delete = NULL;
 493     assoc->init->bend_scan = NULL;
 494     assoc->init->bend_segment = NULL;
 495     assoc->init->bend_fetch = NULL;
 496     assoc->init->bend_explain = NULL;
 497     assoc->init->bend_srw_scan = NULL;
 498     assoc->init->bend_srw_update = NULL;
 499
 500     assoc->init->charneg_request = NULL;
 501     assoc->init->charneg_response = NULL;
 502
 503     assoc->init->decode = assoc->decode;
 504     assoc->init->peer_name =
 505         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
 506
 507     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 508 }
 509
 510 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 511 {
 512     statserv_options_block *cb = statserv_getcontrol();
 513     if (!assoc->init)
 514     {
 515         const char *encoding = "UTF-8";
 516         Z_External *ce;
 517         bend_initresult *binitres;
 518
 519         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 520         assoc_init_reset(assoc);
 521
 522         if (sr->username)
 523         {
 524             Z_IdAuthentication *auth = odr_malloc(assoc->decode, sizeof(*auth));
 525             int len;
 526
 527             len = strlen(sr->username) + 1;
 528             if (sr->password)
 529                 len += strlen(sr->password) + 2;
 530             auth->which = Z_IdAuthentication_open;
 531             auth->u.open = odr_malloc(assoc->decode, len);
 532             strcpy(auth->u.open, sr->username);
 533             if (sr->password && *sr->password)
 534             {
 535                 strcat(auth->u.open, "/");
 536                 strcat(auth->u.open, sr->password);
 537             }
 538             assoc->init->auth = auth;
 539         }
 540
 541 #if 1
 542         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 543         assoc->init->charneg_request = ce->u.charNeg3;
 544 #endif
 545         assoc->backend = 0;
 546         if (!(binitres = (*cb->bend_init)(assoc->init)))
 547         {
 548             assoc->state = ASSOC_DEAD;
 549             yaz_add_srw_diagnostic(assoc->encode, d, num,
 550                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 551             return 0;
 552         }
 553         assoc->backend = binitres->handle;
 554         assoc->init->auth = 0;
 555         if (binitres->errcode)
 556         {
 557             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 558             assoc->state = ASSOC_DEAD;
 559             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 560                                    binitres->errstring);
 561             return 0;
 562         }
 563         return 1;
 564     }
 565     return 1;
 566 }
 567
 568 static const char *get_esn(Z_RecordComposition *comp)
 569 {
 570     if (comp && comp->which == Z_RecordComp_complex)
 571     {
 572         if (comp->u.complex->generic
 573             && comp->u.complex->generic->elementSpec
 574             && (comp->u.complex->generic->elementSpec->which ==
 575                 Z_ElementSpec_elementSetName))
 576             return comp->u.complex->generic->elementSpec->u.elementSetName;
 577     }
 578     else if (comp && comp->which == Z_RecordComp_simple &&
 579              comp->u.simple->which == Z_ElementSetNames_generic)
 580         return comp->u.simple->u.generic;
 581     return 0;
 582 }
 583
 584 static void set_esn(Z_RecordComposition **comp_p, const char *esn, NMEM nmem)
 585 {
 586     Z_RecordComposition *comp = nmem_malloc(nmem, sizeof(*comp));
 587
 588     comp->which = Z_RecordComp_simple;
 589     comp->u.simple = nmem_malloc(nmem, sizeof(*comp->u.simple));
 590     comp->u.simple->which = Z_ElementSetNames_generic;
 591     comp->u.simple->u.generic = nmem_strdup(nmem, esn);
 592     *comp_p = comp;
 593 }
 594
 595 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 596 {
 597 #if YAZ_HAVE_XML2
 598     yaz_record_conv_t rc = 0;
 599     const char *match_schema = 0;
 600     int *match_syntax = 0;
 601
 602     if (assoc->server)
 603     {
 604         int r;
 605         const char *input_schema = get_esn(rr->comp);
 606         Odr_oid *input_syntax_raw = rr->request_format_raw;
 607
 608         const char *backend_schema = 0;
 609         Odr_oid *backend_syntax = 0;
 610
 611         r = yaz_retrieval_request(assoc->server->retrieval,
 612                                   input_schema,
 613                                   input_syntax_raw,
 614                                   &match_schema,
 615                                   &match_syntax,
 616                                   &rc,
 617                                   &backend_schema,
 618                                   &backend_syntax);
 619         if (r == -1) /* error ? */
 620         {
 621             const char *details = yaz_retrieval_get_error(
 622                 assoc->server->retrieval);
 623
 624             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 625             if (details)
 626                 rr->errstring = odr_strdup(rr->stream, details);
 627             return -1;
 628         }
 629         else if (r == 1 || r == 3)
 630         {
 631             const char *details = input_schema;
 632             rr->errcode =  YAZ_BIB1_ELEMENT_SET_NAMES_UNSUPP;
 633             if (details)
 634                 rr->errstring = odr_strdup(rr->stream, details);
 635             return -1;
 636         }
 637         else if (r == 2)
 638         {
 639             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 640             if (input_syntax_raw)
 641             {
 642                 char oidbuf[OID_STR_MAX];
 643                 oid_to_dotstring(input_syntax_raw, oidbuf);
 644                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 645             }
 646             return -1;
 647         }
 648         if (backend_schema)
 649         {
 650             set_esn(&rr->comp, backend_schema, rr->stream->mem);
 651         }
 652         if (backend_syntax)
 653         {
 654             oident *oident_syntax = oid_getentbyoid(backend_syntax);
 655
 656             rr->request_format_raw = backend_syntax;
 657
 658             if (oident_syntax)
 659                 rr->request_format = oident_syntax->value;
 660             else
 661                 rr->request_format = VAL_NONE;
 662         }
 663     }
 664     (*assoc->init->bend_fetch)(assoc->backend, rr);
 665     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
 666     {   /* post conversion must take place .. */
 667         WRBUF output_record = wrbuf_alloc();
 668         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 669         if (r)
 670         {
 671             const char *details = yaz_record_conv_get_error(rc);
 672             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 673             if (details)
 674                 rr->errstring = odr_strdup(rr->stream, details);
 675         }
 676         else
 677         {
 678             rr->len = wrbuf_len(output_record);
 679             rr->record = odr_malloc(rr->stream, rr->len);
 680             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 681         }
 682         wrbuf_free(output_record, 1);
 683     }
 684     if (match_syntax)
 685     {
 686         struct oident *oi = oid_getentbyoid(match_syntax);
 687         rr->output_format = oi ? oi->value : VAL_NONE;
 688         rr->output_format_raw = match_syntax;
 689     }
 690     if (match_schema)
 691         rr->schema = odr_strdup(rr->stream, match_schema);
 692     return 0;
 693 #else
 694     (*assoc->init->bend_fetch)(assoc->backend, rr);
 695 #endif
 696 }
 697
 698 static int srw_bend_fetch(association *assoc, int pos,
 699                           Z_SRW_searchRetrieveRequest *srw_req,
 700                           Z_SRW_record *record,
 701                           const char **addinfo)
 702 {
 703     bend_fetch_rr rr;
 704     ODR o = assoc->encode;
 705
 706     rr.setname = "default";
 707     rr.number = pos;
 708     rr.referenceId = 0;
 709     rr.request_format = VAL_TEXT_XML;
 710     rr.request_format_raw = yaz_oidval_to_z3950oid(assoc->decode,
 711                                                    CLASS_RECSYN,
 712                                                    VAL_TEXT_XML);
 713     rr.comp = (Z_RecordComposition *)
 714             odr_malloc(assoc->decode, sizeof(*rr.comp));
 715     rr.comp->which = Z_RecordComp_complex;
 716     rr.comp->u.complex = (Z_CompSpec *)
 717             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 718     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 719         odr_malloc(assoc->encode, sizeof(bool_t));
 720     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 721     rr.comp->u.complex->num_dbSpecific = 0;
 722     rr.comp->u.complex->dbSpecific = 0;
 723     rr.comp->u.complex->num_recordSyntax = 0;
 724     rr.comp->u.complex->recordSyntax = 0;
 725
 726     rr.comp->u.complex->generic = (Z_Specification *)
 727             odr_malloc(assoc->decode, sizeof(Z_Specification));
 728
 729     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 730     rr.comp->u.complex->generic->which = Z_Schema_uri;
 731     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 732
 733     /* ESN = recordSchema if recordSchema is present */
 734     rr.comp->u.complex->generic->elementSpec = 0;
 735     if (srw_req->recordSchema)
 736     {
 737         rr.comp->u.complex->generic->elementSpec =
 738             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 739         rr.comp->u.complex->generic->elementSpec->which =
 740             Z_ElementSpec_elementSetName;
 741         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 742             srw_req->recordSchema;
 743     }
 744
 745     rr.stream = assoc->encode;
 746     rr.print = assoc->print;
 747
 748     rr.basename = 0;
 749     rr.len = 0;
 750     rr.record = 0;
 751     rr.last_in_set = 0;
 752     rr.errcode = 0;
 753     rr.errstring = 0;
 754     rr.surrogate_flag = 0;
 755     rr.schema = srw_req->recordSchema;
 756
 757     if (!assoc->init->bend_fetch)
 758         return 1;
 759
 760     retrieve_fetch(assoc, &rr);
 761
 762     if (rr.errcode && rr.surrogate_flag)
 763     {
 764         int code = yaz_diag_bib1_to_srw(rr.errcode);
 765         const char *message = yaz_diag_srw_str(code);
 766         int len = 200;
 767         if (message)
 768             len += strlen(message);
 769         if (rr.errstring)
 770             len += strlen(rr.errstring);
 771
 772         record->recordData_buf = odr_malloc(o, len);
 773
 774         sprintf(record->recordData_buf, "<diagnostic "
 775                 "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
 776                 " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
 777         if (rr.errstring)
 778             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 779                     " <details>%s</details>\n", rr.errstring);
 780         if (message)
 781             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 782                     " <message>%s</message>\n", message);
 783         sprintf(record->recordData_buf + strlen(record->recordData_buf),
 784                 "</diagnostic>\n");
 785         record->recordData_len = strlen(record->recordData_buf);
 786         record->recordPosition = odr_intdup(o, pos);
 787         record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
 788         return 0;
 789     }
 790     else if (rr.len >= 0)
 791     {
 792         record->recordData_buf = rr.record;
 793         record->recordData_len = rr.len;
 794         record->recordPosition = odr_intdup(o, pos);
 795         if (rr.schema)
 796             record->recordSchema = odr_strdup(o, rr.schema);
 797         else
 798             record->recordSchema = 0;
 799     }
 800     if (rr.errcode)
 801     {
 802         *addinfo = rr.errstring;
 803         return rr.errcode;
 804     }
 805     return 0;
 806 }
 807
 808 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 809                    Z_Query *query_result)
 810 {
 811     /* have a CQL query and  CQL to PQF transform .. */
 812     CQL_parser cp = cql_parser_create();
 813     int r;
 814     int srw_errcode = 0;
 815     const char *add = 0;
 816     char rpn_buf[5120];
 817
 818     r = cql_parser_string(cp, cql);
 819     if (r)
 820     {
 821         /* CQL syntax error */
 822         srw_errcode = 10;
 823     }
 824     if (!r)
 825     {
 826         /* Syntax OK */
 827         r = cql_transform_buf(ct,
 828                               cql_parser_result(cp),
 829                               rpn_buf, sizeof(rpn_buf)-1);
 830         if (r)
 831             srw_errcode  = cql_transform_error(ct, &add);
 832     }
 833     if (!r)
 834     {
 835         /* Syntax & transform OK. */
 836         /* Convert PQF string to Z39.50 to RPN query struct */
 837         YAZ_PQF_Parser pp = yaz_pqf_create();
 838         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 839         if (!rpnquery)
 840         {
 841             size_t off;
 842             const char *pqf_msg;
 843             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 844             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 845                     pqf_msg, code);
 846             srw_errcode = 10;
 847         }
 848         else
 849         {
 850             query_result->which = Z_Query_type_1;
 851             query_result->u.type_1 = rpnquery;
 852         }
 853         yaz_pqf_destroy(pp);
 854     }
 855     cql_parser_destroy(cp);
 856     return srw_errcode;
 857 }
 858
 859 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 860                         Z_AttributesPlusTerm *result)
 861 {
 862     Z_Query query;
 863     Z_RPNQuery *rpn;
 864     int srw_error = cql2pqf(odr, cql, ct, &query);
 865     if (srw_error)
 866         return srw_error;
 867     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 868         return 10; /* bad query type */
 869     rpn = query.u.type_1;
 870     if (!rpn->RPNStructure)
 871         return 10; /* must be structure */
 872     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 873         return 10; /* must be simple */
 874     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 875         return 10; /* must be attributes plus term node .. */
 876     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 877            sizeof(*result));
 878     return 0;
 879 }
 880
 881 static void srw_bend_search(association *assoc, request *req,
 882                             Z_SRW_PDU *sr,
 883                             Z_SRW_searchRetrieveResponse *srw_res,
 884                             int *http_code)
 885 {
 886     int srw_error = 0;
 887     Z_External *ext;
 888     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 889
 890     *http_code = 200;
 891     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 892     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 893     if (srw_res->num_diagnostics == 0 && assoc->init)
 894     {
 895         bend_search_rr rr;
 896         rr.setname = "default";
 897         rr.replace_set = 1;
 898         rr.num_bases = 1;
 899         rr.basenames = &srw_req->database;
 900         rr.referenceId = 0;
 901         rr.srw_sortKeys = 0;
 902         rr.srw_setname = 0;
 903         rr.srw_setnameIdleTime = 0;
 904         rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 905         rr.query->u.type_1 = 0;
 906
 907         if (srw_req->query_type == Z_SRW_query_type_cql)
 908         {
 909             yaz_log(YLOG_LOG, "CQL string=%s", srw_req->query.cql);
 910             if (assoc->server && assoc->server->cql_transform)
 911             {
 912                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 913                                           assoc->server->cql_transform,
 914                                           rr.query);
 915                 if (srw_errcode)
 916                 {
 917                     yaz_add_srw_diagnostic(assoc->encode,
 918                                            &srw_res->diagnostics,
 919                                            &srw_res->num_diagnostics,
 920                                            srw_errcode, 0);
 921                 }
 922             }
 923             else
 924             {
 925                 /* CQL query to backend. Wrap it - Z39.50 style */
 926                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 927                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 928                                                         "1.2.840.10003.16.2");
 929                 ext->indirect_reference = 0;
 930                 ext->descriptor = 0;
 931                 ext->which = Z_External_CQL;
 932                 ext->u.cql = srw_req->query.cql;
 933
 934                 rr.query->which = Z_Query_type_104;
 935                 rr.query->u.type_104 =  ext;
 936             }
 937         }
 938         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 939         {
 940             Z_RPNQuery *RPNquery;
 941             YAZ_PQF_Parser pqf_parser;
 942
 943             pqf_parser = yaz_pqf_create ();
 944
 945             RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
 946                                       srw_req->query.pqf);
 947             if (!RPNquery)
 948             {
 949                 const char *pqf_msg;
 950                 size_t off;
 951                 int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
 952                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 953                         code, pqf_msg, (long) off);
 954                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 955             }
 956
 957             rr.query->which = Z_Query_type_1;
 958             rr.query->u.type_1 =  RPNquery;
 959
 960             yaz_pqf_destroy (pqf_parser);
 961         }
 962         else
 963         {
 964             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 965                                    &srw_res->num_diagnostics,
 966                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 967         }
 968         if (rr.query->u.type_1)
 969         {
 970             rr.stream = assoc->encode;
 971             rr.decode = assoc->decode;
 972             rr.print = assoc->print;
 973             rr.request = req;
 974             if ( srw_req->sort.sortKeys )
 975                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 976                                              srw_req->sort.sortKeys );
 977             rr.association = assoc;
 978             rr.fd = 0;
 979             rr.hits = 0;
 980             rr.errcode = 0;
 981             rr.errstring = 0;
 982             rr.search_info = 0;
 983             yaz_log_zquery_level(log_requestdetail,rr.query);
 984
 985             (assoc->init->bend_search)(assoc->backend, &rr);
 986             if (rr.errcode)
 987             {
 988                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 989                 {
 990                     *http_code = 404;
 991                 }
 992                 else
 993                 {
 994                     srw_error = yaz_diag_bib1_to_srw (rr.errcode);
 995                     yaz_add_srw_diagnostic(assoc->encode,
 996                                            &srw_res->diagnostics,
 997                                            &srw_res->num_diagnostics,
 998                                            srw_error, rr.errstring);
 999                 }
1000             }
1001             else
1002             {
1003                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
1004                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
1005
1006                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
1007                         start, number, rr.hits);
1008
1009                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
1010                 if (rr.srw_setname)
1011                 {
1012                     srw_res->resultSetId =
1013                         odr_strdup(assoc->encode, rr.srw_setname );
1014                     srw_res->resultSetIdleTime =
1015                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
1016                 }
1017
1018                 if (start > rr.hits || start < 1)
1019                 {
1020                     yaz_add_srw_diagnostic(
1021                         assoc->encode,
1022                         &srw_res->diagnostics, &srw_res->num_diagnostics,
1023                         YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1024                 }
1025                 else if (number > 0)
1026                 {
1027                     int i;
1028                     int ok = 1;
1029                     if (start + number > rr.hits)
1030                         number = rr.hits - start + 1;
1031
1032                     /* Call bend_present if defined */
1033                     if (assoc->init->bend_present)
1034                     {
1035                         bend_present_rr *bprr = (bend_present_rr*)
1036                             odr_malloc (assoc->decode, sizeof(*bprr));
1037                         bprr->setname = "default";
1038                         bprr->start = start;
1039                         bprr->number = number;
1040                         bprr->format = VAL_TEXT_XML;
1041                         if (srw_req->recordSchema)
1042                         {
1043                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1044                                                                             sizeof(*bprr->comp));
1045                             bprr->comp->which = Z_RecordComp_simple;
1046                             bprr->comp->u.simple = (Z_ElementSetNames *)
1047                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1048                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1049                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1050                         }
1051                         else
1052                         {
1053                             bprr->comp = 0;
1054                         }
1055                         bprr->stream = assoc->encode;
1056                         bprr->referenceId = 0;
1057                         bprr->print = assoc->print;
1058                         bprr->request = req;
1059                         bprr->association = assoc;
1060                         bprr->errcode = 0;
1061                         bprr->errstring = NULL;
1062                         (*assoc->init->bend_present)(assoc->backend, bprr);
1063
1064                         if (!bprr->request)
1065                             return;
1066                         if (bprr->errcode)
1067                         {
1068                             srw_error = yaz_diag_bib1_to_srw (bprr->errcode);
1069                             yaz_add_srw_diagnostic(assoc->encode,
1070                                                    &srw_res->diagnostics,
1071                                                    &srw_res->num_diagnostics,
1072                                                    srw_error, bprr->errstring);
1073                             ok = 0;
1074                         }
1075                     }
1076
1077                     if (ok)
1078                     {
1079                         int j = 0;
1080                         int packing = Z_SRW_recordPacking_string;
1081                         if (srw_req->recordPacking){
1082                             if (!strcmp(srw_req->recordPacking, "xml"))
1083                                 packing = Z_SRW_recordPacking_XML;
1084                             if (!strcmp(srw_req->recordPacking, "url"))
1085                                 packing = Z_SRW_recordPacking_URL;
1086                         }
1087                         srw_res->records = (Z_SRW_record *)
1088                             odr_malloc(assoc->encode,
1089                                        number * sizeof(*srw_res->records));
1090
1091                         srw_res->extra_records = (Z_SRW_extra_record **)
1092                             odr_malloc(assoc->encode,
1093                                        number*sizeof(*srw_res->extra_records));
1094
1095                         for (i = 0; i<number; i++)
1096                         {
1097                             int errcode;
1098                             const char *addinfo = 0;
1099
1100                             srw_res->records[j].recordPacking = packing;
1101                             srw_res->records[j].recordData_buf = 0;
1102                             srw_res->extra_records[j] = 0;
1103                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1104                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1105                                                      srw_res->records + j,
1106                                                      &addinfo);
1107                             if (errcode)
1108                             {
1109                                 yaz_add_srw_diagnostic(assoc->encode,
1110                                                        &srw_res->diagnostics,
1111                                                        &srw_res->num_diagnostics,
1112                                                        yaz_diag_bib1_to_srw (errcode),
1113                                                        addinfo);
1114
1115                                 break;
1116                             }
1117                             if (srw_res->records[j].recordData_buf)
1118                                 j++;
1119                         }
1120                         srw_res->num_records = j;
1121                         if (!j)
1122                             srw_res->records = 0;
1123                     }
1124                 }
1125             }
1126         }
1127     }
1128     if (log_request)
1129     {
1130         const char *querystr = "?";
1131         const char *querytype = "?";
1132         WRBUF wr = wrbuf_alloc();
1133
1134         switch (srw_req->query_type)
1135         {
1136         case Z_SRW_query_type_cql:
1137             querytype = "CQL";
1138             querystr = srw_req->query.cql;
1139             break;
1140         case Z_SRW_query_type_pqf:
1141             querytype = "PQF";
1142             querystr = srw_req->query.pqf;
1143             break;
1144         }
1145         wrbuf_printf(wr, "SRWSearch ");
1146         wrbuf_printf(wr, srw_req->database);
1147         wrbuf_printf(wr, " ");
1148         if (srw_res->num_diagnostics)
1149             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1150         else if (*http_code != 200)
1151             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1152         else if (srw_res->numberOfRecords)
1153         {
1154             wrbuf_printf(wr, "OK %d",
1155                          (srw_res->numberOfRecords ?
1156                           *srw_res->numberOfRecords : 0));
1157         }
1158         wrbuf_printf(wr, " %s %d+%d",
1159                      (srw_res->resultSetId ?
1160                       srw_res->resultSetId : "-"),
1161                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1162                      srw_res->num_records);
1163         yaz_log(log_request, "%s %s: %s", wrbuf_buf(wr), querytype, querystr);
1164         wrbuf_free(wr, 1);
1165     }
1166 }
1167
1168 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1169 {
1170 #if YAZ_HAVE_XML2
1171     xmlNodePtr ptr = rr->server_node_ptr;
1172     if (!ptr)
1173         return 0;
1174     for (ptr = ptr->children; ptr; ptr = ptr->next)
1175     {
1176         if (ptr->type != XML_ELEMENT_NODE)
1177             continue;
1178         if (!strcmp((const char *) ptr->name, "explain"))
1179         {
1180             int len;
1181             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1182             xmlChar *buf_out;
1183             char *content;
1184
1185             ptr = xmlCopyNode(ptr, 1);
1186
1187             xmlDocSetRootElement(doc, ptr);
1188
1189             xmlDocDumpMemory(doc, &buf_out, &len);
1190             content = (char*) odr_malloc(rr->stream, 1+len);
1191             memcpy(content, buf_out, len);
1192             content[len] = '\0';
1193
1194             xmlFree(buf_out);
1195             xmlFreeDoc(doc);
1196             rr->explain_buf = content;
1197             return 0;
1198         }
1199     }
1200 #endif
1201     return 0;
1202 }
1203
1204 static void srw_bend_explain(association *assoc, request *req,
1205                              Z_SRW_PDU *sr,
1206                              Z_SRW_explainResponse *srw_res,
1207                              int *http_code)
1208 {
1209     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1210     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1211     *http_code = 404;
1212     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1213     if (assoc->init)
1214     {
1215         bend_explain_rr rr;
1216
1217         rr.stream = assoc->encode;
1218         rr.decode = assoc->decode;
1219         rr.print = assoc->print;
1220         rr.explain_buf = 0;
1221         rr.database = srw_req->database;
1222         if (assoc->server)
1223             rr.server_node_ptr = assoc->server->server_node_ptr;
1224         else
1225             rr.server_node_ptr = 0;
1226         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1227         if (assoc->init->bend_explain)
1228             (*assoc->init->bend_explain)(assoc->backend, &rr);
1229         else
1230             srw_bend_explain_default(assoc->backend, &rr);
1231
1232         if (rr.explain_buf)
1233         {
1234             int packing = Z_SRW_recordPacking_string;
1235             if (srw_req->recordPacking)
1236             {
1237                 if (!strcmp(srw_req->recordPacking, "xml"))
1238                     packing = Z_SRW_recordPacking_XML;
1239                 else if (!strcmp(srw_req->recordPacking, "url"))
1240                     packing = Z_SRW_recordPacking_URL;
1241             }
1242             srw_res->record.recordSchema = rr.schema;
1243             srw_res->record.recordPacking = packing;
1244             srw_res->record.recordData_buf = rr.explain_buf;
1245             srw_res->record.recordData_len = strlen(rr.explain_buf);
1246             srw_res->record.recordPosition = 0;
1247             *http_code = 200;
1248         }
1249     }
1250 }
1251
1252 static void srw_bend_scan(association *assoc, request *req,
1253                           Z_SRW_PDU *sr,
1254                           Z_SRW_scanResponse *srw_res,
1255                           int *http_code)
1256 {
1257     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1258     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1259
1260     *http_code = 200;
1261     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1262     if (srw_res->num_diagnostics == 0 && assoc->init)
1263     {
1264         struct scan_entry *save_entries;
1265
1266         bend_scan_rr *bsrr = (bend_scan_rr *)
1267             odr_malloc (assoc->encode, sizeof(*bsrr));
1268         bsrr->num_bases = 1;
1269         bsrr->basenames = &srw_req->database;
1270
1271         bsrr->num_entries = srw_req->maximumTerms ?
1272             *srw_req->maximumTerms : 10;
1273         bsrr->term_position = srw_req->responsePosition ?
1274             *srw_req->responsePosition : 1;
1275
1276         bsrr->errcode = 0;
1277         bsrr->errstring = 0;
1278         bsrr->referenceId = 0;
1279         bsrr->stream = assoc->encode;
1280         bsrr->print = assoc->print;
1281         bsrr->step_size = odr_intdup(assoc->decode, 0);
1282         bsrr->entries = 0;
1283
1284         if (bsrr->num_entries > 0)
1285         {
1286             int i;
1287             bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1288                                        bsrr->num_entries);
1289             for (i = 0; i<bsrr->num_entries; i++)
1290             {
1291                 bsrr->entries[i].term = 0;
1292                 bsrr->entries[i].occurrences = 0;
1293                 bsrr->entries[i].errcode = 0;
1294                 bsrr->entries[i].errstring = 0;
1295                 bsrr->entries[i].display_term = 0;
1296             }
1297         }
1298         save_entries = bsrr->entries;  /* save it so we can compare later */
1299
1300         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1301             assoc->init->bend_scan)
1302         {
1303             Odr_oid *scan_attributeSet = 0;
1304             oident *attset;
1305             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1306
1307             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1308                                       &scan_attributeSet,
1309                                       srw_req->scanClause.pqf);
1310             if (scan_attributeSet &&
1311                 (attset = oid_getentbyoid(scan_attributeSet)) &&
1312                 (attset->oclass == CLASS_ATTSET ||
1313                  attset->oclass == CLASS_GENERAL))
1314                 bsrr->attributeset = attset->value;
1315             else
1316                 bsrr->attributeset = VAL_NONE;
1317             yaz_pqf_destroy(pqf_parser);
1318             bsrr->scanClause = 0;
1319             ((int (*)(void *, bend_scan_rr *))
1320              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1321         }
1322         else if (srw_req->query_type == Z_SRW_query_type_cql
1323                  && assoc->init->bend_scan && assoc->server
1324                  && assoc->server->cql_transform)
1325         {
1326             int srw_error;
1327             bsrr->scanClause = 0;
1328             bsrr->attributeset = VAL_NONE;
1329             bsrr->term = odr_malloc(assoc->decode, sizeof(*bsrr->term));
1330             srw_error = cql2pqf_scan(assoc->encode,
1331                                      srw_req->scanClause.cql,
1332                                      assoc->server->cql_transform,
1333                                      bsrr->term);
1334             if (srw_error)
1335                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1336                                        &srw_res->num_diagnostics,
1337                                        srw_error, 0);
1338             else
1339             {
1340                 ((int (*)(void *, bend_scan_rr *))
1341                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1342             }
1343         }
1344         else if (srw_req->query_type == Z_SRW_query_type_cql
1345                  && assoc->init->bend_srw_scan)
1346         {
1347             bsrr->term = 0;
1348             bsrr->attributeset = VAL_NONE;
1349             bsrr->scanClause = srw_req->scanClause.cql;
1350             ((int (*)(void *, bend_scan_rr *))
1351              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1352         }
1353         else
1354         {
1355             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1356                                    &srw_res->num_diagnostics,
1357                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1358         }
1359         if (bsrr->errcode)
1360         {
1361             int srw_error;
1362             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1363             {
1364                 *http_code = 404;
1365                 return;
1366             }
1367             srw_error = yaz_diag_bib1_to_srw (bsrr->errcode);
1368
1369             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1370                                    &srw_res->num_diagnostics,
1371                                    srw_error, bsrr->errstring);
1372         }
1373         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1374         {
1375             int i;
1376             srw_res->terms = (Z_SRW_scanTerm*)
1377                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1378                            bsrr->num_entries);
1379
1380             srw_res->num_terms =  bsrr->num_entries;
1381             for (i = 0; i<bsrr->num_entries; i++)
1382             {
1383                 Z_SRW_scanTerm *t = srw_res->terms + i;
1384                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1385                 t->numberOfRecords =
1386                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1387                 t->displayTerm = 0;
1388                 if (save_entries == bsrr->entries &&
1389                     bsrr->entries[i].display_term)
1390                 {
1391                     /* the entries was _not_ set by the handler. So it's
1392                        safe to test for new member display_term. It is
1393                        NULL'ed by us.
1394                     */
1395                     t->displayTerm = odr_strdup(assoc->encode,
1396                                                 bsrr->entries[i].display_term);
1397                 }
1398                 t->whereInList = 0;
1399             }
1400         }
1401     }
1402     if (log_request)
1403     {
1404         WRBUF wr = wrbuf_alloc();
1405         const char *querytype = 0;
1406         const char *querystr = 0;
1407
1408         switch(srw_req->query_type)
1409         {
1410         case Z_SRW_query_type_pqf:
1411             querytype = "PQF";
1412             querystr = srw_req->scanClause.pqf;
1413             break;
1414         case Z_SRW_query_type_cql:
1415             querytype = "CQL";
1416             querystr = srw_req->scanClause.cql;
1417             break;
1418         default:
1419             querytype = "UNKNOWN";
1420             querystr = "";
1421         }
1422
1423         wrbuf_printf(wr, "SRWScan ");
1424         wrbuf_printf(wr, srw_req->database);
1425         wrbuf_printf(wr, " ");
1426
1427         if (srw_res->num_diagnostics)
1428             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1429         else if (srw_res->num_terms)
1430             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1431         else
1432             wrbuf_printf(wr, "OK - - ");
1433
1434         wrbuf_printf(wr, "%d+%d+0 ",
1435                      (srw_req->responsePosition ?
1436                       *srw_req->responsePosition : 1),
1437                      (srw_req->maximumTerms ?
1438                       *srw_req->maximumTerms : 1));
1439         /* there is no step size in SRU/W ??? */
1440         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1441         yaz_log(log_request, "%s ", wrbuf_buf(wr) );
1442         wrbuf_free(wr, 1);
1443     }
1444
1445 }
1446
1447 static void srw_bend_update(association *assoc, request *req,
1448                             Z_SRW_PDU *sr,
1449                             Z_SRW_updateResponse *srw_res,
1450                             int *http_code)
1451 {
1452     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1453     yaz_log(YLOG_DEBUG, "Got SRW UpdateRequest");
1454     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1455     *http_code = 404;
1456     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1457     if (assoc->init)
1458     {
1459         bend_update_rr rr;
1460
1461         rr.stream = assoc->encode;
1462         rr.print = assoc->print;
1463         rr.num_bases = 1;
1464         rr.basenames = &srw_req->database;
1465         rr.operation = srw_req->operation;
1466         rr.operation_status = "failed";
1467         rr.record_id = 0;
1468         rr.record_version = 0;
1469         rr.record_checksum = 0;
1470         rr.record_old_version = 0;
1471         rr.record_packing = "xml";
1472         rr.record_schema = 0;
1473         rr.record_data = 0;
1474         rr.request_extra_record = 0;
1475         rr.response_extra_record = 0;
1476         rr.extra_request_data = 0;
1477         rr.extra_response_data = 0;
1478         rr.uri = 0;
1479         rr.message = 0;
1480         rr.details = 0;
1481
1482         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1483         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1484         if ( !strcmp( rr.operation, "delete" ) ){
1485             if ( !srw_req->recordId ){
1486                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1487                                        &srw_res->num_diagnostics,
1488                                        7, "recordId" );
1489             }
1490             else {
1491                 rr.record_id = srw_req->recordId;
1492             }
1493             if (  !srw_req->recordVersion ){
1494                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1495                                        &srw_res->num_diagnostics,
1496                                        7, "recordVersion" );
1497             }
1498             else {
1499                 rr.record_version = odr_strdup( assoc->encode,
1500                                                 srw_req->recordVersion );
1501
1502             }
1503             if ( srw_req->recordOldVersion ){
1504                 rr.record_old_version = odr_strdup(assoc->encode,
1505                                                    srw_req->recordOldVersion );
1506             }
1507             if ( srw_req->extraRequestData ){
1508                 rr.extra_request_data = odr_strdup(assoc->encode,
1509                                                    srw_req->extraRequestData );
1510             }
1511         }
1512         else if ( !strcmp( rr.operation, "replace" ) ){
1513             if ( !srw_req->recordId ){
1514                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1515                                        &srw_res->num_diagnostics,
1516                                        7, "recordId" );
1517             }
1518             else {
1519                 rr.record_id = srw_req->recordId;
1520             }
1521             if ( srw_req->record.recordSchema == 0 ){
1522                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1523                                        &srw_res->num_diagnostics,
1524                                        7, "recordSchema" );
1525             }
1526             else {
1527                 rr.record_schema = odr_strdup(assoc->encode,
1528                                               srw_req->record.recordSchema );
1529             }
1530             switch (srw_req->record.recordPacking)
1531             {
1532             case Z_SRW_recordPacking_string:
1533                 rr.record_packing = "string";
1534                 break;
1535             case Z_SRW_recordPacking_XML:
1536                 rr.record_packing = "xml";
1537                 break;
1538             case Z_SRW_recordPacking_URL:
1539                 rr.record_packing = "url";
1540                 break;
1541             }
1542             if ( srw_req->record.recordData_len ){
1543                 rr.record_data = odr_strdupn(assoc->encode,
1544                                              srw_req->record.recordData_buf,
1545                                              srw_req->record.recordData_len );
1546                 rr.request_extra_record = srw_req->extra_record;
1547             }
1548             else {
1549                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1550                                        &srw_res->num_diagnostics,
1551                                        7, "recordData" );
1552             }
1553             if (srw_req->extraRequestData)
1554                 rr.extra_request_data = odr_strdup(assoc->encode,
1555                                                    srw_req->extraRequestData );
1556         }
1557         else if ( !strcmp( rr.operation, "insert" ) )
1558         {
1559             rr.record_id = srw_req->recordId;
1560             if ( srw_req->record.recordSchema == 0 ){
1561                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1562                                        &srw_res->num_diagnostics,
1563                                        7, "recordSchema" );
1564             }
1565             else {
1566                 rr.record_schema = odr_strdup(assoc->encode,
1567                                               srw_req->record.recordSchema);
1568             }
1569             switch (srw_req->record.recordPacking)
1570             {
1571             case Z_SRW_recordPacking_string:
1572                 rr.record_packing = "string";
1573                 break;
1574             case Z_SRW_recordPacking_XML:
1575                 rr.record_packing = "xml";
1576                 break;
1577             case Z_SRW_recordPacking_URL:
1578                 rr.record_packing = "url";
1579                 break;
1580             }
1581
1582             if (srw_req->record.recordData_len)
1583             {
1584                 rr.record_data = odr_strdupn(assoc->encode,
1585                                              srw_req->record.recordData_buf,
1586                                              srw_req->record.recordData_len );
1587                 rr.request_extra_record = srw_req->extra_record;
1588             }
1589             else
1590                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1591                                        &srw_res->num_diagnostics,
1592                                        7, "recordData" );
1593             if ( srw_req->extraRequestData )
1594                 rr.extra_request_data = odr_strdup(assoc->encode,
1595                                                    srw_req->extraRequestData );
1596         }
1597         if (srw_res->num_diagnostics == 0)
1598         {
1599             if ( assoc->init->bend_srw_update)
1600                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1601             else {
1602                 yaz_log( YLOG_WARN, "Got No Update function!");
1603                 return;
1604             }
1605         }
1606
1607         if (rr.uri)
1608             yaz_add_srw_diagnostic_uri(assoc->encode,
1609                                        &srw_res->diagnostics,
1610                                        &srw_res->num_diagnostics,
1611                                        rr.uri,
1612                                        rr.message,
1613                                        rr.details);
1614         srw_res->recordId = rr.record_id;
1615         srw_res->operationStatus = rr.operation_status;
1616         srw_res->recordVersion = rr.record_version;
1617         srw_res->recordChecksum = rr.record_checksum;
1618         srw_res->extraResponseData = rr.extra_response_data;
1619         srw_res->record.recordPosition = 0;
1620         if (srw_res->num_diagnostics == 0 && rr.record_data)
1621         {
1622             srw_res->record.recordSchema = rr.record_schema;
1623             srw_res->record.recordPacking = srw_req->record.recordPacking;
1624             srw_res->record.recordData_buf = rr.record_data;
1625             srw_res->record.recordData_len = strlen(rr.record_data);
1626             srw_res->extra_record = rr.response_extra_record;
1627
1628         }
1629         else
1630             srw_res->record.recordData_len = 0;
1631         *http_code = 200;
1632     }
1633 }
1634
1635 /* check if path is OK (1); BAD (0) */
1636 static int check_path(const char *path)
1637 {
1638     if (*path != '/')
1639         return 0;
1640     if (strstr(path, ".."))
1641         return 0;
1642     return 1;
1643 }
1644
1645 static char *read_file(const char *fname, ODR o, int *sz)
1646 {
1647     char *buf;
1648     FILE *inf = fopen(fname, "rb");
1649     if (!inf)
1650         return 0;
1651
1652     fseek(inf, 0L, SEEK_END);
1653     *sz = ftell(inf);
1654     rewind(inf);
1655     buf = odr_malloc(o, *sz);
1656     fread(buf, 1, *sz, inf);
1657     fclose(inf);
1658     return buf;
1659 }
1660
1661 static void process_http_request(association *assoc, request *req)
1662 {
1663     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1664     ODR o = assoc->encode;
1665     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1666     Z_SRW_PDU *sr = 0;
1667     Z_SOAP *soap_package = 0;
1668     Z_GDU *p = 0;
1669     char *charset = 0;
1670     Z_HTTP_Response *hres = 0;
1671     int keepalive = 1;
1672     const char *stylesheet = 0; /* for now .. set later */
1673     Z_SRW_diagnostic *diagnostic = 0;
1674     int num_diagnostic = 0;
1675     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1676
1677     if (!control_association(assoc, host, 0))
1678     {
1679         p = z_get_HTTP_Response(o, 404);
1680         r = 1;
1681     }
1682     if (r == 2 && assoc->server && assoc->server->docpath
1683         && hreq->path[0] == '/'
1684         &&
1685         /* check if path is a proper prefix of documentroot */
1686         strncmp(hreq->path+1, assoc->server->docpath,
1687                 strlen(assoc->server->docpath))
1688         == 0)
1689     {
1690         if (!check_path(hreq->path))
1691         {
1692             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1693             p = z_get_HTTP_Response(o, 404);
1694         }
1695         else
1696         {
1697             int content_size = 0;
1698             char *content_buf = read_file(hreq->path+1, o, &content_size);
1699             if (!content_buf)
1700             {
1701                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1702                 p = z_get_HTTP_Response(o, 404);
1703             }
1704             else
1705             {
1706                 const char *ctype = 0;
1707                 yaz_mime_types types = yaz_mime_types_create();
1708
1709                 yaz_mime_types_add(types, "xsl", "application/xml");
1710                 yaz_mime_types_add(types, "xml", "application/xml");
1711                 yaz_mime_types_add(types, "css", "text/css");
1712                 yaz_mime_types_add(types, "html", "text/html");
1713                 yaz_mime_types_add(types, "htm", "text/html");
1714                 yaz_mime_types_add(types, "txt", "text/plain");
1715                 yaz_mime_types_add(types, "js", "application/x-javascript");
1716
1717                 yaz_mime_types_add(types, "gif", "image/gif");
1718                 yaz_mime_types_add(types, "png", "image/png");
1719                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1720                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1721
1722                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1723                 if (!ctype)
1724                 {
1725                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1726                     p = z_get_HTTP_Response(o, 404);
1727                 }
1728                 else
1729                 {
1730                     p = z_get_HTTP_Response(o, 200);
1731                     hres = p->u.HTTP_Response;
1732                     hres->content_buf = content_buf;
1733                     hres->content_len = content_size;
1734                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1735                 }
1736                 yaz_mime_types_destroy(types);
1737             }
1738         }
1739         r = 1;
1740     }
1741
1742     if (r == 2)
1743     {
1744         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1745         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1746     }
1747     if (r == 2)  /* not taken */
1748     {
1749         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1750                            &diagnostic, &num_diagnostic);
1751         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1752     }
1753     if (r == 0)  /* decode SRW/SRU OK .. */
1754     {
1755         int http_code = 200;
1756         if (sr->which == Z_SRW_searchRetrieve_request)
1757         {
1758             Z_SRW_PDU *res =
1759                 yaz_srw_get(assoc->encode, Z_SRW_searchRetrieve_response);
1760
1761             stylesheet = sr->u.request->stylesheet;
1762             if (num_diagnostic)
1763             {
1764                 res->u.response->diagnostics = diagnostic;
1765                 res->u.response->num_diagnostics = num_diagnostic;
1766             }
1767             else
1768             {
1769                 srw_bend_search(assoc, req, sr, res->u.response,
1770                                 &http_code);
1771             }
1772             if (http_code == 200)
1773                 soap_package->u.generic->p = res;
1774         }
1775         else if (sr->which == Z_SRW_explain_request)
1776         {
1777             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
1778             stylesheet = sr->u.explain_request->stylesheet;
1779             if (num_diagnostic)
1780             {
1781                 res->u.explain_response->diagnostics = diagnostic;
1782                 res->u.explain_response->num_diagnostics = num_diagnostic;
1783             }
1784             srw_bend_explain(assoc, req, sr,
1785                              res->u.explain_response, &http_code);
1786             if (http_code == 200)
1787                 soap_package->u.generic->p = res;
1788         }
1789         else if (sr->which == Z_SRW_scan_request)
1790         {
1791             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_scan_response);
1792             stylesheet = sr->u.scan_request->stylesheet;
1793             if (num_diagnostic)
1794             {
1795                 res->u.scan_response->diagnostics = diagnostic;
1796                 res->u.scan_response->num_diagnostics = num_diagnostic;
1797             }
1798             srw_bend_scan(assoc, req, sr,
1799                           res->u.scan_response, &http_code);
1800             if (http_code == 200)
1801                 soap_package->u.generic->p = res;
1802         }
1803         else if (sr->which == Z_SRW_update_request)
1804         {
1805             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_update_response);
1806             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1807             if (num_diagnostic)
1808             {
1809                 res->u.update_response->diagnostics = diagnostic;
1810                 res->u.update_response->num_diagnostics = num_diagnostic;
1811             }
1812             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1813             srw_bend_update(assoc, req, sr,
1814                             res->u.update_response, &http_code);
1815             if (http_code == 200)
1816                 soap_package->u.generic->p = res;
1817         }
1818         else
1819         {
1820             yaz_log(log_request, "SOAP ERROR");
1821             /* FIXME - what error, what query */
1822             http_code = 500;
1823             z_soap_error(assoc->encode, soap_package,
1824                          "SOAP-ENV:Client", "Bad method", 0);
1825         }
1826         if (http_code == 200 || http_code == 500)
1827         {
1828             static Z_SOAP_Handler soap_handlers[4] = {
1829 #if YAZ_HAVE_XML2
1830                 {"http://www.loc.gov/zing/srw/", 0,
1831                  (Z_SOAP_fun) yaz_srw_codec},
1832                 {"http://www.loc.gov/zing/srw/v1.0/", 0,
1833                  (Z_SOAP_fun) yaz_srw_codec},
1834                 {"http://www.loc.gov/zing/srw/update/", 0,
1835                  (Z_SOAP_fun) yaz_ucp_codec},
1836 #endif
1837                 {0, 0, 0}
1838             };
1839             char ctype[60];
1840             int ret;
1841             p = z_get_HTTP_Response(o, 200);
1842             hres = p->u.HTTP_Response;
1843
1844             if (!stylesheet && assoc->server)
1845                 stylesheet = assoc->server->stylesheet;
1846
1847             /* empty stylesheet means NO stylesheet */
1848             if (stylesheet && *stylesheet == '\0')
1849                 stylesheet = 0;
1850
1851             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1852                                        &hres->content_buf, &hres->content_len,
1853                                        soap_handlers, charset, stylesheet);
1854             hres->code = http_code;
1855
1856             strcpy(ctype, "text/xml");
1857             if (charset)
1858             {
1859                 strcat(ctype, "; charset=");
1860                 strcat(ctype, charset);
1861             }
1862             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1863         }
1864         else
1865             p = z_get_HTTP_Response(o, http_code);
1866     }
1867
1868     if (p == 0)
1869         p = z_get_HTTP_Response(o, 500);
1870     hres = p->u.HTTP_Response;
1871     if (!strcmp(hreq->version, "1.0"))
1872     {
1873         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1874         if (v && !strcmp(v, "Keep-Alive"))
1875             keepalive = 1;
1876         else
1877             keepalive = 0;
1878         hres->version = "1.0";
1879     }
1880     else
1881     {
1882         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1883         if (v && !strcmp(v, "close"))
1884             keepalive = 0;
1885         else
1886             keepalive = 1;
1887         hres->version = "1.1";
1888     }
1889     if (!keepalive)
1890     {
1891         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1892         assoc->state = ASSOC_DEAD;
1893         assoc->cs_get_mask = 0;
1894     }
1895     else
1896     {
1897         int t;
1898         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1899
1900         if (alive && isdigit(*(const unsigned char *) alive))
1901             t = atoi(alive);
1902         else
1903             t = 15;
1904         if (t < 0 || t > 3600)
1905             t = 3600;
1906         iochan_settimeout(assoc->client_chan,t);
1907         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1908     }
1909     process_gdu_response(assoc, req, p);
1910 }
1911
1912 static void process_gdu_request(association *assoc, request *req)
1913 {
1914     if (req->gdu_request->which == Z_GDU_Z3950)
1915     {
1916         char *msg = 0;
1917         req->apdu_request = req->gdu_request->u.z3950;
1918         if (process_z_request(assoc, req, &msg) < 0)
1919             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1920     }
1921     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1922         process_http_request(assoc, req);
1923     else
1924     {
1925         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1926     }
1927 }
1928
1929 /*
1930  * Initiate request processing.
1931  */
1932 static int process_z_request(association *assoc, request *req, char **msg)
1933 {
1934     int fd = -1;
1935     Z_APDU *res;
1936     int retval;
1937
1938     *msg = "Unknown Error";
1939     assert(req && req->state == REQUEST_IDLE);
1940     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1941     {
1942         *msg = "Missing InitRequest";
1943         return -1;
1944     }
1945     switch (req->apdu_request->which)
1946     {
1947     case Z_APDU_initRequest:
1948         res = process_initRequest(assoc, req); break;
1949     case Z_APDU_searchRequest:
1950         res = process_searchRequest(assoc, req, &fd); break;
1951     case Z_APDU_presentRequest:
1952         res = process_presentRequest(assoc, req, &fd); break;
1953     case Z_APDU_scanRequest:
1954         if (assoc->init->bend_scan)
1955             res = process_scanRequest(assoc, req, &fd);
1956         else
1957         {
1958             *msg = "Cannot handle Scan APDU";
1959             return -1;
1960         }
1961         break;
1962     case Z_APDU_extendedServicesRequest:
1963         if (assoc->init->bend_esrequest)
1964             res = process_ESRequest(assoc, req, &fd);
1965         else
1966         {
1967             *msg = "Cannot handle Extended Services APDU";
1968             return -1;
1969         }
1970         break;
1971     case Z_APDU_sortRequest:
1972         if (assoc->init->bend_sort)
1973             res = process_sortRequest(assoc, req, &fd);
1974         else
1975         {
1976             *msg = "Cannot handle Sort APDU";
1977             return -1;
1978         }
1979         break;
1980     case Z_APDU_close:
1981         process_close(assoc, req);
1982         return 0;
1983     case Z_APDU_deleteResultSetRequest:
1984         if (assoc->init->bend_delete)
1985             res = process_deleteRequest(assoc, req, &fd);
1986         else
1987         {
1988             *msg = "Cannot handle Delete APDU";
1989             return -1;
1990         }
1991         break;
1992     case Z_APDU_segmentRequest:
1993         if (assoc->init->bend_segment)
1994         {
1995             res = process_segmentRequest (assoc, req);
1996         }
1997         else
1998         {
1999             *msg = "Cannot handle Segment APDU";
2000             return -1;
2001         }
2002         break;
2003     case Z_APDU_triggerResourceControlRequest:
2004         return 0;
2005     default:
2006         *msg = "Bad APDU received";
2007         return -1;
2008     }
2009     if (res)
2010     {
2011         yaz_log(YLOG_DEBUG, "  result immediately available");
2012         retval = process_z_response(assoc, req, res);
2013     }
2014     else if (fd < 0)
2015     {
2016         yaz_log(YLOG_DEBUG, "  result unavailble");
2017         retval = 0;
2018     }
2019     else /* no result yet - one will be provided later */
2020     {
2021         IOCHAN chan;
2022
2023         /* Set up an I/O handler for the fd supplied by the backend */
2024
2025         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2026         req->state = REQUEST_PENDING;
2027         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2028             abort();
2029         iochan_setdata(chan, assoc);
2030         retval = 0;
2031     }
2032     return retval;
2033 }
2034
2035 /*
2036  * Handle message from the backend.
2037  */
2038 void backend_response(IOCHAN i, int event)
2039 {
2040     association *assoc = (association *)iochan_getdata(i);
2041     request *req = request_head(&assoc->incoming);
2042     Z_APDU *res;
2043     int fd;
2044
2045     yaz_log(YLOG_DEBUG, "backend_response");
2046     assert(assoc && req && req->state != REQUEST_IDLE);
2047     /* determine what it is we're waiting for */
2048     switch (req->apdu_request->which)
2049     {
2050         case Z_APDU_searchRequest:
2051             res = response_searchRequest(assoc, req, 0, &fd); break;
2052 #if 0
2053         case Z_APDU_presentRequest:
2054             res = response_presentRequest(assoc, req, 0, &fd); break;
2055         case Z_APDU_scanRequest:
2056             res = response_scanRequest(assoc, req, 0, &fd); break;
2057 #endif
2058         default:
2059             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2060             abort();
2061     }
2062     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2063     {
2064         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2065         do_close(assoc, Z_Close_systemProblem, 0);
2066         iochan_destroy(i);
2067         return;
2068     }
2069     else if (!res) /* no result yet - try again later */
2070     {
2071         yaz_log(YLOG_DEBUG, "   no result yet");
2072         iochan_setfd(i, fd); /* in case fd has changed */
2073     }
2074 }
2075
2076 /*
2077  * Encode response, and transfer the request structure to the outgoing queue.
2078  */
2079 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2080 {
2081     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2082
2083     if (assoc->print)
2084     {
2085         if (!z_GDU(assoc->print, &res, 0, 0))
2086             yaz_log(YLOG_WARN, "ODR print error: %s",
2087                 odr_errmsg(odr_geterror(assoc->print)));
2088         odr_reset(assoc->print);
2089     }
2090     if (!z_GDU(assoc->encode, &res, 0, 0))
2091     {
2092         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2093                 odr_errmsg(odr_geterror(assoc->decode)),
2094                 odr_getelement(assoc->decode));
2095         return -1;
2096     }
2097     req->response = odr_getbuf(assoc->encode, &req->len_response,
2098         &req->size_response);
2099     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2100     odr_reset(assoc->encode);
2101     req->state = REQUEST_IDLE;
2102     request_enq(&assoc->outgoing, req);
2103     /* turn the work over to the ir_session handler */
2104     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2105     assoc->cs_put_mask = EVENT_OUTPUT;
2106     /* Is there more work to be done? give that to the input handler too */
2107 #if 1
2108     if (request_head(&assoc->incoming))
2109     {
2110         yaz_log (YLOG_DEBUG, "more work to be done");
2111         iochan_setevent(assoc->client_chan, EVENT_WORK);
2112     }
2113 #endif
2114     return 0;
2115 }
2116
2117 /*
2118  * Encode response, and transfer the request structure to the outgoing queue.
2119  */
2120 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2121 {
2122     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2123     gres->which = Z_GDU_Z3950;
2124     gres->u.z3950 = res;
2125
2126     return process_gdu_response(assoc, req, gres);
2127 }
2128
2129 static char *get_vhost(Z_OtherInformation *otherInfo)
2130 {
2131     return yaz_oi_get_string_oidval(&otherInfo, VAL_PROXY, 1, 0);
2132 }
2133
2134 /*
2135  * Handle init request.
2136  * At the moment, we don't check the options
2137  * anywhere else in the code - we just try not to do anything that would
2138  * break a naive client. We'll toss 'em into the association block when
2139  * we need them there.
2140  */
2141 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2142 {
2143     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2144     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2145     Z_InitResponse *resp = apdu->u.initResponse;
2146     bend_initresult *binitres;
2147     char *version;
2148     char options[140];
2149     statserv_options_block *cb = 0;  /* by default no control for backend */
2150
2151     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2152         cb = statserv_getcontrol();  /* got control block for backend */
2153
2154     if (cb && assoc->backend)
2155         (*cb->bend_close)(assoc->backend);
2156
2157     yaz_log(log_requestdetail, "Got initRequest");
2158     if (req->implementationId)
2159         yaz_log(log_requestdetail, "Id:        %s",
2160                 req->implementationId);
2161     if (req->implementationName)
2162         yaz_log(log_requestdetail, "Name:      %s",
2163                 req->implementationName);
2164     if (req->implementationVersion)
2165         yaz_log(log_requestdetail, "Version:   %s",
2166                 req->implementationVersion);
2167
2168     assoc_init_reset(assoc);
2169
2170     assoc->init->auth = req->idAuthentication;
2171     assoc->init->referenceId = req->referenceId;
2172
2173     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2174     {
2175         Z_CharSetandLanguageNegotiation *negotiation =
2176             yaz_get_charneg_record (req->otherInfo);
2177         if (negotiation &&
2178             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2179             assoc->init->charneg_request = negotiation;
2180     }
2181
2182     assoc->backend = 0;
2183     if (cb)
2184     {
2185         if (req->implementationVersion)
2186             yaz_log(log_requestdetail, "Config:    %s",
2187                     cb->configname);
2188
2189         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2190
2191         /* we have a backend control block, so call that init function */
2192         if (!(binitres = (*cb->bend_init)(assoc->init)))
2193         {
2194             yaz_log(YLOG_WARN, "Bad response from backend.");
2195             return 0;
2196         }
2197         assoc->backend = binitres->handle;
2198     }
2199     else
2200     {
2201         /* no backend. return error */
2202         binitres = odr_malloc(assoc->encode, sizeof(*binitres));
2203         binitres->errstring = 0;
2204         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2205         iochan_settimeout(assoc->client_chan, 10);
2206     }
2207     if ((assoc->init->bend_sort))
2208         yaz_log (YLOG_DEBUG, "Sort handler installed");
2209     if ((assoc->init->bend_search))
2210         yaz_log (YLOG_DEBUG, "Search handler installed");
2211     if ((assoc->init->bend_present))
2212         yaz_log (YLOG_DEBUG, "Present handler installed");
2213     if ((assoc->init->bend_esrequest))
2214         yaz_log (YLOG_DEBUG, "ESRequest handler installed");
2215     if ((assoc->init->bend_delete))
2216         yaz_log (YLOG_DEBUG, "Delete handler installed");
2217     if ((assoc->init->bend_scan))
2218         yaz_log (YLOG_DEBUG, "Scan handler installed");
2219     if ((assoc->init->bend_segment))
2220         yaz_log (YLOG_DEBUG, "Segment handler installed");
2221
2222     resp->referenceId = req->referenceId;
2223     *options = '\0';
2224     /* let's tell the client what we can do */
2225     if (ODR_MASK_GET(req->options, Z_Options_search))
2226     {
2227         ODR_MASK_SET(resp->options, Z_Options_search);
2228         strcat(options, "srch");
2229     }
2230     if (ODR_MASK_GET(req->options, Z_Options_present))
2231     {
2232         ODR_MASK_SET(resp->options, Z_Options_present);
2233         strcat(options, " prst");
2234     }
2235     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2236         assoc->init->bend_delete)
2237     {
2238         ODR_MASK_SET(resp->options, Z_Options_delSet);
2239         strcat(options, " del");
2240     }
2241     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2242         assoc->init->bend_esrequest)
2243     {
2244         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2245         strcat (options, " extendedServices");
2246     }
2247     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2248     {
2249         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2250         strcat(options, " namedresults");
2251     }
2252     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2253     {
2254         ODR_MASK_SET(resp->options, Z_Options_scan);
2255         strcat(options, " scan");
2256     }
2257     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2258     {
2259         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2260         strcat(options, " concurrop");
2261     }
2262     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2263     {
2264         ODR_MASK_SET(resp->options, Z_Options_sort);
2265         strcat(options, " sort");
2266     }
2267
2268     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
2269         && assoc->init->charneg_response)
2270     {
2271         Z_OtherInformation **p;
2272         Z_OtherInformationUnit *p0;
2273
2274         yaz_oi_APDU(apdu, &p);
2275
2276         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
2277             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2278
2279             p0->which = Z_OtherInfo_externallyDefinedInfo;
2280             p0->information.externallyDefinedInfo =
2281                 assoc->init->charneg_response;
2282         }
2283         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2284         strcat(options, " negotiation");
2285     }
2286
2287     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2288         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2289
2290     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2291     {
2292         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2293         assoc->version = 1; /* 1 & 2 are equivalent */
2294     }
2295     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2296     {
2297         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2298         assoc->version = 2;
2299     }
2300     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2301     {
2302         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2303         assoc->version = 3;
2304     }
2305
2306     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2307
2308     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2309         assoc->maximumRecordSize = *req->maximumRecordSize;
2310
2311     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2312         assoc->preferredMessageSize = *req->preferredMessageSize;
2313
2314     resp->preferredMessageSize = &assoc->preferredMessageSize;
2315     resp->maximumRecordSize = &assoc->maximumRecordSize;
2316
2317     resp->implementationId = odr_prepend(assoc->encode,
2318                 assoc->init->implementation_id,
2319                 resp->implementationId);
2320
2321     resp->implementationName = odr_prepend(assoc->encode,
2322                 assoc->init->implementation_name,
2323                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2324
2325     version = odr_strdup(assoc->encode, "$Revision: 1.101 $");
2326     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2327         version[strlen(version)-2] = '\0';
2328     resp->implementationVersion = odr_prepend(assoc->encode,
2329                 assoc->init->implementation_version,
2330                 odr_prepend(assoc->encode, &version[11],
2331                             resp->implementationVersion));
2332
2333     if (binitres->errcode)
2334     {
2335         assoc->state = ASSOC_DEAD;
2336         resp->userInformationField =
2337             init_diagnostics(assoc->encode, binitres->errcode,
2338                              binitres->errstring);
2339         *resp->result = 0;
2340     }
2341     if (log_request)
2342     {
2343         if (!req->idAuthentication)
2344             yaz_log(log_request, "Auth none");
2345         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2346         {
2347             const char *open = req->idAuthentication->u.open;
2348             const char *slash = strchr(open, '/');
2349             int len;
2350             if (slash)
2351                 len = slash - open;
2352             else
2353                 len = strlen(open);
2354                 yaz_log(log_request, "Auth open %.*s", len, open);
2355         }
2356         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2357         {
2358             const char *user = req->idAuthentication->u.idPass->userId;
2359             const char *group = req->idAuthentication->u.idPass->groupId;
2360             yaz_log(log_request, "Auth idPass %s %s",
2361                     user ? user : "-", group ? group : "-");
2362         }
2363         else if (req->idAuthentication->which
2364                  == Z_IdAuthentication_anonymous)
2365         {
2366             yaz_log(log_request, "Auth anonymous");
2367         }
2368         else
2369         {
2370             yaz_log(log_request, "Auth other");
2371         }
2372     }
2373     if (log_request)
2374     {
2375         WRBUF wr = wrbuf_alloc();
2376         wrbuf_printf(wr, "Init ");
2377         if (binitres->errcode)
2378             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2379         else
2380             wrbuf_printf(wr, "OK -");
2381         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2382                      (req->implementationId ? req->implementationId :"-"),
2383                      (req->implementationName ?
2384                       req->implementationName : "-"),
2385                      (req->implementationVersion ?
2386                       req->implementationVersion : "-")
2387             );
2388         yaz_log(log_request, "%s", wrbuf_buf(wr));
2389         wrbuf_free(wr, 1);
2390     }
2391     return apdu;
2392 }
2393
2394 /*
2395  * Set the specified `errcode' and `errstring' into a UserInfo-1
2396  * external to be returned to the client in accordance with Z35.90
2397  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2398  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2399  */
2400 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2401 {
2402     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2403         addinfo ? " -- " : "", addinfo ? addinfo : "");
2404     return zget_init_diagnostics(odr, error, addinfo);
2405 }
2406
2407 /*
2408  * nonsurrogate diagnostic record.
2409  */
2410 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2411 {
2412     Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec));
2413
2414     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2415             addinfo ? " -- " : "", addinfo ? addinfo : "");
2416
2417     rec->which = Z_Records_NSD;
2418     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2419                                                            error, addinfo);
2420     return rec;
2421 }
2422
2423 /*
2424  * surrogate diagnostic.
2425  */
2426 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2427                                           const char *dbname,
2428                                           int error, const char *addinfo)
2429 {
2430     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2431             addinfo ? " -- " : "", addinfo ? addinfo : "");
2432     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2433 }
2434
2435 static Z_Records *pack_records(association *a, char *setname, int start,
2436                                int *num, Z_RecordComposition *comp,
2437                                int *next, int *pres, oid_value format,
2438                                Z_ReferenceId *referenceId,
2439                                int *oid, int *errcode)
2440 {
2441     int recno, total_length = 0, toget = *num, dumped_records = 0;
2442     Z_Records *records =
2443         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
2444     Z_NamePlusRecordList *reclist =
2445         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
2446     Z_NamePlusRecord **list =
2447         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
2448
2449     records->which = Z_Records_DBOSD;
2450     records->u.databaseOrSurDiagnostics = reclist;
2451     reclist->num_records = 0;
2452     reclist->records = list;
2453     *pres = Z_PresentStatus_success;
2454     *num = 0;
2455     *next = 0;
2456
2457     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2458     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2459         a->maximumRecordSize);
2460     for (recno = start; reclist->num_records < toget; recno++)
2461     {
2462         bend_fetch_rr freq;
2463         Z_NamePlusRecord *thisrec;
2464         int this_length = 0;
2465         /*
2466          * we get the number of bytes allocated on the stream before any
2467          * allocation done by the backend - this should give us a reasonable
2468          * idea of the total size of the data so far.
2469          */
2470         total_length = odr_total(a->encode) - dumped_records;
2471         freq.errcode = 0;
2472         freq.errstring = 0;
2473         freq.basename = 0;
2474         freq.len = 0;
2475         freq.record = 0;
2476         freq.last_in_set = 0;
2477         freq.setname = setname;
2478         freq.surrogate_flag = 0;
2479         freq.number = recno;
2480         freq.comp = comp;
2481         freq.request_format = format;
2482         freq.request_format_raw = oid;
2483         freq.output_format = format;
2484         freq.output_format_raw = 0;
2485         freq.stream = a->encode;
2486         freq.print = a->print;
2487         freq.referenceId = referenceId;
2488         freq.schema = 0;
2489
2490         retrieve_fetch(a, &freq);
2491
2492         *next = freq.last_in_set ? 0 : recno + 1;
2493
2494         /* backend should be able to signal whether error is system-wide
2495            or only pertaining to current record */
2496         if (freq.errcode)
2497         {
2498             if (!freq.surrogate_flag)
2499             {
2500                 char s[20];
2501                 *pres = Z_PresentStatus_failure;
2502                 /* for 'present request out of range',
2503                    set addinfo to record position if not set */
2504                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2505                                 freq.errstring == 0)
2506                 {
2507                     sprintf (s, "%d", recno);
2508                     freq.errstring = s;
2509                 }
2510                 if (errcode)
2511                     *errcode = freq.errcode;
2512                 return diagrec(a, freq.errcode, freq.errstring);
2513             }
2514             reclist->records[reclist->num_records] =
2515                 surrogatediagrec(a, freq.basename, freq.errcode,
2516                                  freq.errstring);
2517             reclist->num_records++;
2518             continue;
2519         }
2520         if (freq.record == 0)  /* no error and no record ? */
2521         {
2522             *next = 0;   /* signal end-of-set and stop */
2523             break;
2524         }
2525         if (freq.len >= 0)
2526             this_length = freq.len;
2527         else
2528             this_length = odr_total(a->encode) - total_length - dumped_records;
2529         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2530             this_length, total_length, dumped_records);
2531         if (a->preferredMessageSize > 0 &&
2532                 this_length + total_length > a->preferredMessageSize)
2533         {
2534             /* record is small enough, really */
2535             if (this_length <= a->preferredMessageSize && recno > start)
2536             {
2537                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2538                 *pres = Z_PresentStatus_partial_2;
2539                 break;
2540             }
2541             /* record can only be fetched by itself */
2542             if (this_length < a->maximumRecordSize)
2543             {
2544                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2545                 if (toget > 1)
2546                 {
2547                     yaz_log(YLOG_DEBUG, "  Dropped it");
2548                     reclist->records[reclist->num_records] =
2549                          surrogatediagrec(a, freq.basename, 16, 0);
2550                     reclist->num_records++;
2551                     dumped_records += this_length;
2552                     continue;
2553                 }
2554             }
2555             else /* too big entirely */
2556             {
2557                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2558                         this_length, a->maximumRecordSize);
2559                 reclist->records[reclist->num_records] =
2560                     surrogatediagrec(a, freq.basename, 17, 0);
2561                 reclist->num_records++;
2562                 dumped_records += this_length;
2563                 continue;
2564             }
2565         }
2566
2567         if (!(thisrec = (Z_NamePlusRecord *)
2568               odr_malloc(a->encode, sizeof(*thisrec))))
2569             return 0;
2570         if (freq.basename)
2571             thisrec->databaseName = odr_strdup(a->encode, freq.basename);
2572         else
2573             thisrec->databaseName = 0;
2574         thisrec->which = Z_NamePlusRecord_databaseRecord;
2575
2576         if (freq.output_format_raw)
2577         {
2578             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
2579             freq.output_format = ident->value;
2580         }
2581         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
2582                                                  freq.record, freq.len);
2583         if (!thisrec->u.databaseRecord)
2584             return 0;
2585         reclist->records[reclist->num_records] = thisrec;
2586         reclist->num_records++;
2587     }
2588     *num = reclist->num_records;
2589     return records;
2590 }
2591
2592 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2593     int *fd)
2594 {
2595     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2596     bend_search_rr *bsrr =
2597         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
2598
2599     yaz_log(log_requestdetail, "Got SearchRequest.");
2600     bsrr->fd = fd;
2601     bsrr->request = reqb;
2602     bsrr->association = assoc;
2603     bsrr->referenceId = req->referenceId;
2604     save_referenceId (reqb, bsrr->referenceId);
2605     bsrr->srw_sortKeys = 0;
2606     bsrr->srw_setname = 0;
2607     bsrr->srw_setnameIdleTime = 0;
2608
2609     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2610     if (req->databaseNames)
2611     {
2612         int i;
2613         for (i = 0; i < req->num_databaseNames; i++)
2614             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2615     }
2616
2617     yaz_log_zquery_level(log_requestdetail,req->query);
2618
2619     if (assoc->init->bend_search)
2620     {
2621         bsrr->setname = req->resultSetName;
2622         bsrr->replace_set = *req->replaceIndicator;
2623         bsrr->num_bases = req->num_databaseNames;
2624         bsrr->basenames = req->databaseNames;
2625         bsrr->query = req->query;
2626         bsrr->stream = assoc->encode;
2627         nmem_transfer(bsrr->stream->mem, reqb->request_mem);
2628         bsrr->decode = assoc->decode;
2629         bsrr->print = assoc->print;
2630         bsrr->hits = 0;
2631         bsrr->errcode = 0;
2632         bsrr->errstring = NULL;
2633         bsrr->search_info = NULL;
2634
2635         if (assoc->server && assoc->server->cql_transform
2636             && req->query->which == Z_Query_type_104
2637             && req->query->u.type_104->which == Z_External_CQL)
2638         {
2639             /* have a CQL query and a CQL to PQF transform .. */
2640             int srw_errcode =
2641                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2642                         assoc->server->cql_transform, bsrr->query);
2643             if (srw_errcode)
2644                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2645         }
2646         if (!bsrr->errcode)
2647             (assoc->init->bend_search)(assoc->backend, bsrr);
2648         if (!bsrr->request)  /* backend not ready with the search response */
2649             return 0;  /* should not be used any more */
2650     }
2651     else
2652     {
2653         /* FIXME - make a diagnostic for it */
2654         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2655     }
2656     return response_searchRequest(assoc, reqb, bsrr, fd);
2657 }
2658
2659 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2660
2661 /*
2662  * Prepare a searchresponse based on the backend results. We probably want
2663  * to look at making the fetching of records nonblocking as well, but
2664  * so far, we'll keep things simple.
2665  * If bsrt is null, that means we're called in response to a communications
2666  * event, and we'll have to get the response for ourselves.
2667  */
2668 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2669     bend_search_rr *bsrt, int *fd)
2670 {
2671     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2672     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2673     Z_SearchResponse *resp = (Z_SearchResponse *)
2674         odr_malloc (assoc->encode, sizeof(*resp));
2675     int *nulint = odr_intdup (assoc->encode, 0);
2676     bool_t *sr = odr_intdup(assoc->encode, 1);
2677     int *next = odr_intdup(assoc->encode, 0);
2678     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2679     int returnedrecs=0;
2680
2681     apdu->which = Z_APDU_searchResponse;
2682     apdu->u.searchResponse = resp;
2683     resp->referenceId = req->referenceId;
2684     resp->additionalSearchInfo = 0;
2685     resp->otherInfo = 0;
2686     *fd = -1;
2687     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2688     {
2689         yaz_log(YLOG_FATAL, "Bad result from backend");
2690         return 0;
2691     }
2692     else if (bsrt->errcode)
2693     {
2694         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2695         resp->resultCount = nulint;
2696         resp->numberOfRecordsReturned = nulint;
2697         resp->nextResultSetPosition = nulint;
2698         resp->searchStatus = nulint;
2699         resp->resultSetStatus = none;
2700         resp->presentStatus = 0;
2701     }
2702     else
2703     {
2704         int *toget = odr_intdup(assoc->encode, 0);
2705         int *presst = odr_intdup(assoc->encode, 0);
2706         Z_RecordComposition comp, *compp = 0;
2707
2708         yaz_log (log_requestdetail, "resultCount: %d", bsrt->hits);
2709
2710         resp->records = 0;
2711         resp->resultCount = &bsrt->hits;
2712
2713         comp.which = Z_RecordComp_simple;
2714         /* how many records does the user agent want, then? */
2715         if (bsrt->hits <= *req->smallSetUpperBound)
2716         {
2717             *toget = bsrt->hits;
2718             if ((comp.u.simple = req->smallSetElementSetNames))
2719                 compp = &comp;
2720         }
2721         else if (bsrt->hits < *req->largeSetLowerBound)
2722         {
2723             *toget = *req->mediumSetPresentNumber;
2724             if (*toget > bsrt->hits)
2725                 *toget = bsrt->hits;
2726             if ((comp.u.simple = req->mediumSetElementSetNames))
2727                 compp = &comp;
2728         }
2729         else
2730             *toget = 0;
2731
2732         if (*toget && !resp->records)
2733         {
2734             oident *prefformat;
2735             oid_value form;
2736
2737             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2738                 form = VAL_NONE;
2739             else
2740                 form = prefformat->value;
2741
2742             /* Call bend_present if defined */
2743             if (assoc->init->bend_present)
2744             {
2745                 bend_present_rr *bprr = (bend_present_rr *)
2746                     nmem_malloc (reqb->request_mem, sizeof(*bprr));
2747                 bprr->setname = req->resultSetName;
2748                 bprr->start = 1;
2749                 bprr->number = *toget;
2750                 bprr->format = form;
2751                 bprr->comp = compp;
2752                 bprr->referenceId = req->referenceId;
2753                 bprr->stream = assoc->encode;
2754                 bprr->print = assoc->print;
2755                 bprr->request = reqb;
2756                 bprr->association = assoc;
2757                 bprr->errcode = 0;
2758                 bprr->errstring = NULL;
2759                 (*assoc->init->bend_present)(assoc->backend, bprr);
2760
2761                 if (!bprr->request)
2762                     return 0;
2763                 if (bprr->errcode)
2764                 {
2765                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2766                     *resp->presentStatus = Z_PresentStatus_failure;
2767                 }
2768             }
2769
2770             if (!resp->records)
2771                 resp->records = pack_records(assoc, req->resultSetName, 1,
2772                                              toget, compp, next, presst, form, req->referenceId,
2773                                              req->preferredRecordSyntax, NULL);
2774             if (!resp->records)
2775                 return 0;
2776             resp->numberOfRecordsReturned = toget;
2777             returnedrecs = *toget;
2778             resp->nextResultSetPosition = next;
2779             resp->searchStatus = sr;
2780             resp->resultSetStatus = 0;
2781             resp->presentStatus = presst;
2782         }
2783         else
2784         {
2785             if (*resp->resultCount)
2786                 *next = 1;
2787             resp->numberOfRecordsReturned = nulint;
2788             resp->nextResultSetPosition = next;
2789             resp->searchStatus = sr;
2790             resp->resultSetStatus = 0;
2791             resp->presentStatus = 0;
2792         }
2793     }
2794     resp->additionalSearchInfo = bsrt->search_info;
2795
2796     if (log_request)
2797     {
2798         int i;
2799         WRBUF wr = wrbuf_alloc();
2800
2801         for (i = 0 ; i < req->num_databaseNames; i++){
2802             if (i)
2803                 wrbuf_printf(wr, "+");
2804             wrbuf_printf(wr, req->databaseNames[i]);
2805         }
2806         wrbuf_printf(wr, " ");
2807
2808         if (bsrt->errcode)
2809             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2810         else
2811             wrbuf_printf(wr, "OK %d", bsrt->hits);
2812         wrbuf_printf(wr, " %s 1+%d ",
2813                      req->resultSetName, returnedrecs);
2814         yaz_query_to_wrbuf(wr, req->query);
2815
2816         yaz_log(log_request, "Search %s", wrbuf_buf(wr));
2817         wrbuf_free(wr, 1);
2818     }
2819     return apdu;
2820 }
2821
2822 /*
2823  * Maybe we got a little over-friendly when we designed bend_fetch to
2824  * get only one record at a time. Some backends can optimise multiple-record
2825  * fetches, and at any rate, there is some overhead involved in
2826  * all that selecting and hopping around. Problem is, of course, that the
2827  * frontend can't know ahead of time how many records it'll need to
2828  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2829  * is downright lousy as a bulk data transfer protocol.
2830  *
2831  * To start with, we'll do the fetching of records from the backend
2832  * in one operation: To save some trips in and out of the event-handler,
2833  * and to simplify the interface to pack_records. At any rate, asynch
2834  * operation is more fun in operations that have an unpredictable execution
2835  * speed - which is normally more true for search than for present.
2836  */
2837 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2838                                       int *fd)
2839 {
2840     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2841     oident *prefformat;
2842     oid_value form;
2843     Z_APDU *apdu;
2844     Z_PresentResponse *resp;
2845     int *next;
2846     int *num;
2847     int errcode = 0;
2848     const char *errstring = 0;
2849
2850     yaz_log(log_requestdetail, "Got PresentRequest.");
2851
2852     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2853         form = VAL_NONE;
2854     else
2855         form = prefformat->value;
2856     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2857     resp->records = 0;
2858     resp->presentStatus = odr_intdup(assoc->encode, 0);
2859     if (assoc->init->bend_present)
2860     {
2861         bend_present_rr *bprr = (bend_present_rr *)
2862             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2863         bprr->setname = req->resultSetId;
2864         bprr->start = *req->resultSetStartPoint;
2865         bprr->number = *req->numberOfRecordsRequested;
2866         bprr->format = form;
2867         bprr->comp = req->recordComposition;
2868         bprr->referenceId = req->referenceId;
2869         bprr->stream = assoc->encode;
2870         bprr->print = assoc->print;
2871         bprr->request = reqb;
2872         bprr->association = assoc;
2873         bprr->errcode = 0;
2874         bprr->errstring = NULL;
2875         (*assoc->init->bend_present)(assoc->backend, bprr);
2876
2877         if (!bprr->request)
2878             return 0; /* should not happen */
2879         if (bprr->errcode)
2880         {
2881             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2882             *resp->presentStatus = Z_PresentStatus_failure;
2883             errcode = bprr->errcode;
2884             errstring = bprr->errstring;
2885         }
2886     }
2887     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2888     next = odr_intdup(assoc->encode, 0);
2889     num = odr_intdup(assoc->encode, 0);
2890
2891     apdu->which = Z_APDU_presentResponse;
2892     apdu->u.presentResponse = resp;
2893     resp->referenceId = req->referenceId;
2894     resp->otherInfo = 0;
2895
2896     if (!resp->records)
2897     {
2898         *num = *req->numberOfRecordsRequested;
2899         resp->records =
2900             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2901                          num, req->recordComposition, next,
2902                          resp->presentStatus,
2903                          form, req->referenceId, req->preferredRecordSyntax,
2904                          &errcode);
2905     }
2906     if (log_request)
2907     {
2908         WRBUF wr = wrbuf_alloc();
2909         wrbuf_printf(wr, "Present ");
2910
2911         if (*resp->presentStatus == Z_PresentStatus_failure)
2912             wrbuf_printf(wr, "ERROR %d ", errcode);
2913         else if (*resp->presentStatus == Z_PresentStatus_success)
2914             wrbuf_printf(wr, "OK -  ");
2915         else
2916             wrbuf_printf(wr, "Partial %d - ", *resp->presentStatus);
2917
2918         wrbuf_printf(wr, " %s %d+%d ",
2919                 req->resultSetId, *req->resultSetStartPoint,
2920                 *req->numberOfRecordsRequested);
2921         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2922         wrbuf_free(wr, 1);
2923     }
2924     if (!resp->records)
2925         return 0;
2926     resp->numberOfRecordsReturned = num;
2927     resp->nextResultSetPosition = next;
2928
2929     return apdu;
2930 }
2931
2932 /*
2933  * Scan was implemented rather in a hurry, and with support for only the basic
2934  * elements of the service in the backend API. Suggestions are welcome.
2935  */
2936 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2937 {
2938     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2939     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2940     Z_ScanResponse *res = (Z_ScanResponse *)
2941         odr_malloc (assoc->encode, sizeof(*res));
2942     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2943     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2944     Z_ListEntries *ents = (Z_ListEntries *)
2945         odr_malloc (assoc->encode, sizeof(*ents));
2946     Z_DiagRecs *diagrecs_p = NULL;
2947     oident *attset;
2948     bend_scan_rr *bsrr = (bend_scan_rr *)
2949         odr_malloc (assoc->encode, sizeof(*bsrr));
2950     struct scan_entry *save_entries;
2951
2952     yaz_log(log_requestdetail, "Got ScanRequest");
2953
2954     apdu->which = Z_APDU_scanResponse;
2955     apdu->u.scanResponse = res;
2956     res->referenceId = req->referenceId;
2957
2958     /* if step is absent, set it to 0 */
2959     res->stepSize = odr_intdup(assoc->encode, 0);
2960     if (req->stepSize)
2961         *res->stepSize = *req->stepSize;
2962
2963     res->scanStatus = scanStatus;
2964     res->numberOfEntriesReturned = numberOfEntriesReturned;
2965     res->positionOfTerm = 0;
2966     res->entries = ents;
2967     ents->num_entries = 0;
2968     ents->entries = NULL;
2969     ents->num_nonsurrogateDiagnostics = 0;
2970     ents->nonsurrogateDiagnostics = NULL;
2971     res->attributeSet = 0;
2972     res->otherInfo = 0;
2973
2974     if (req->databaseNames)
2975     {
2976         int i;
2977         for (i = 0; i < req->num_databaseNames; i++)
2978             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2979     }
2980     bsrr->scanClause = 0;
2981     bsrr->errcode = 0;
2982     bsrr->errstring = 0;
2983     bsrr->num_bases = req->num_databaseNames;
2984     bsrr->basenames = req->databaseNames;
2985     bsrr->num_entries = *req->numberOfTermsRequested;
2986     bsrr->term = req->termListAndStartPoint;
2987     bsrr->referenceId = req->referenceId;
2988     bsrr->stream = assoc->encode;
2989     bsrr->print = assoc->print;
2990     bsrr->step_size = res->stepSize;
2991     bsrr->entries = 0;
2992     /* For YAZ 2.0 and earlier it was the backend handler that
2993        initialized entries (member display_term did not exist)
2994        YAZ 2.0 and later sets 'entries'  and initialize all members
2995        including 'display_term'. If YAZ 2.0 or later sees that
2996        entries was modified - we assume that it is an old handler and
2997        that 'display_term' is _not_ set.
2998     */
2999     if (bsrr->num_entries > 0)
3000     {
3001         int i;
3002         bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3003                                    bsrr->num_entries);
3004         for (i = 0; i<bsrr->num_entries; i++)
3005         {
3006             bsrr->entries[i].term = 0;
3007             bsrr->entries[i].occurrences = 0;
3008             bsrr->entries[i].errcode = 0;
3009             bsrr->entries[i].errstring = 0;
3010             bsrr->entries[i].display_term = 0;
3011         }
3012     }
3013     save_entries = bsrr->entries;  /* save it so we can compare later */
3014
3015     if (req->attributeSet &&
3016         (attset = oid_getentbyoid(req->attributeSet)) &&
3017         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
3018         bsrr->attributeset = attset->value;
3019     else
3020         bsrr->attributeset = VAL_NONE;
3021     log_scan_term_level (log_requestdetail, req->termListAndStartPoint,
3022             bsrr->attributeset);
3023     bsrr->term_position = req->preferredPositionInResponse ?
3024         *req->preferredPositionInResponse : 1;
3025
3026     ((int (*)(void *, bend_scan_rr *))
3027      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3028
3029     if (bsrr->errcode)
3030         diagrecs_p = zget_DiagRecs(assoc->encode,
3031                                    bsrr->errcode, bsrr->errstring);
3032     else
3033     {
3034         int i;
3035         Z_Entry **tab = (Z_Entry **)
3036             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
3037
3038         if (bsrr->status == BEND_SCAN_PARTIAL)
3039             *scanStatus = Z_Scan_partial_5;
3040         else
3041             *scanStatus = Z_Scan_success;
3042         ents->entries = tab;
3043         ents->num_entries = bsrr->num_entries;
3044         res->numberOfEntriesReturned = &ents->num_entries;
3045         res->positionOfTerm = &bsrr->term_position;
3046         for (i = 0; i < bsrr->num_entries; i++)
3047         {
3048             Z_Entry *e;
3049             Z_TermInfo *t;
3050             Odr_oct *o;
3051
3052             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3053             if (bsrr->entries[i].occurrences >= 0)
3054             {
3055                 e->which = Z_Entry_termInfo;
3056                 e->u.termInfo = t = (Z_TermInfo *)
3057                     odr_malloc(assoc->encode, sizeof(*t));
3058                 t->suggestedAttributes = 0;
3059                 t->displayTerm = 0;
3060                 if (save_entries == bsrr->entries &&
3061                     bsrr->entries[i].display_term)
3062                 {
3063                     /* the entries was _not_ set by the handler. So it's
3064                        safe to test for new member display_term. It is
3065                        NULL'ed by us.
3066                     */
3067                     t->displayTerm = odr_strdup(assoc->encode,
3068                                                 bsrr->entries[i].display_term);
3069                 }
3070                 t->alternativeTerm = 0;
3071                 t->byAttributes = 0;
3072                 t->otherTermInfo = 0;
3073                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3074                 t->term = (Z_Term *)
3075                     odr_malloc(assoc->encode, sizeof(*t->term));
3076                 t->term->which = Z_Term_general;
3077                 t->term->u.general = o =
3078                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3079                 o->buf = (unsigned char *)
3080                     odr_malloc(assoc->encode, o->len = o->size =
3081                                strlen(bsrr->entries[i].term));
3082                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3083                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3084                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3085             }
3086             else
3087             {
3088                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3089                                                   bsrr->entries[i].errcode,
3090                                                   bsrr->entries[i].errstring);
3091                 assert (drecs->num_diagRecs == 1);
3092                 e->which = Z_Entry_surrogateDiagnostic;
3093                 assert (drecs->diagRecs[0]);
3094                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3095             }
3096         }
3097     }
3098     if (diagrecs_p)
3099     {
3100         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3101         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3102     }
3103     if (log_request)
3104     {
3105         int i;
3106         WRBUF wr = wrbuf_alloc();
3107         wrbuf_printf(wr, "Scan ");
3108         for (i = 0 ; i < req->num_databaseNames; i++){
3109             if (i)
3110                 wrbuf_printf(wr, "+");
3111             wrbuf_printf(wr, req->databaseNames[i]);
3112         }
3113         wrbuf_printf(wr, " ");
3114
3115         if (bsrr->errcode){
3116             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3117             wrbuf_printf(wr, " ");
3118         }
3119         else
3120             wrbuf_printf(wr, "OK ");
3121         /* else if (*res->scanStatus == Z_Scan_success) */
3122         /*    wrbuf_printf(wr, "OK "); */
3123         /* else */
3124         /* wrbuf_printf(wr, "Partial "); */
3125
3126         if (*res->numberOfEntriesReturned)
3127             wrbuf_printf(wr, "%d - ", *res->numberOfEntriesReturned);
3128         else
3129             wrbuf_printf(wr, "0 - ");
3130
3131         wrbuf_printf(wr, "%d+%d+%d ",
3132                      (req->preferredPositionInResponse ?
3133                       *req->preferredPositionInResponse : 1),
3134                      *req->numberOfTermsRequested,
3135                      (res->stepSize ? *res->stepSize : 1));
3136
3137         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3138                           bsrr->attributeset);
3139         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3140         wrbuf_free(wr, 1);
3141     }
3142     return apdu;
3143 }
3144
3145 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3146     int *fd)
3147 {
3148     int i;
3149     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3150     Z_SortResponse *res = (Z_SortResponse *)
3151         odr_malloc (assoc->encode, sizeof(*res));
3152     bend_sort_rr *bsrr = (bend_sort_rr *)
3153         odr_malloc (assoc->encode, sizeof(*bsrr));
3154
3155     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3156
3157     yaz_log(log_requestdetail, "Got SortRequest.");
3158
3159     bsrr->num_input_setnames = req->num_inputResultSetNames;
3160     for (i=0;i<req->num_inputResultSetNames;i++)
3161         yaz_log(log_requestdetail, "Input resultset: '%s'",
3162                 req->inputResultSetNames[i]);
3163     bsrr->input_setnames = req->inputResultSetNames;
3164     bsrr->referenceId = req->referenceId;
3165     bsrr->output_setname = req->sortedResultSetName;
3166     yaz_log(log_requestdetail, "Output resultset: '%s'",
3167                 req->sortedResultSetName);
3168     bsrr->sort_sequence = req->sortSequence;
3169        /*FIXME - dump those sequences too */
3170     bsrr->stream = assoc->encode;
3171     bsrr->print = assoc->print;
3172
3173     bsrr->sort_status = Z_SortResponse_failure;
3174     bsrr->errcode = 0;
3175     bsrr->errstring = 0;
3176
3177     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3178
3179     res->referenceId = bsrr->referenceId;
3180     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3181     res->resultSetStatus = 0;
3182     if (bsrr->errcode)
3183     {
3184         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3185                                        bsrr->errcode, bsrr->errstring);
3186         res->diagnostics = dr->diagRecs;
3187         res->num_diagnostics = dr->num_diagRecs;
3188     }
3189     else
3190     {
3191         res->num_diagnostics = 0;
3192         res->diagnostics = 0;
3193     }
3194     res->resultCount = 0;
3195     res->otherInfo = 0;
3196
3197     apdu->which = Z_APDU_sortResponse;
3198     apdu->u.sortResponse = res;
3199     if (log_request)
3200     {
3201         WRBUF wr = wrbuf_alloc();
3202         wrbuf_printf(wr, "Sort ");
3203         if (bsrr->errcode)
3204             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3205         else
3206             wrbuf_printf(wr,  "OK -");
3207         wrbuf_printf(wr, " (");
3208         for (i = 0; i<req->num_inputResultSetNames; i++)
3209         {
3210             if (i)
3211                 wrbuf_printf(wr, "+");
3212             wrbuf_printf(wr, req->inputResultSetNames[i]);
3213         }
3214         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3215
3216         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3217         wrbuf_free(wr, 1);
3218     }
3219     return apdu;
3220 }
3221
3222 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3223     int *fd)
3224 {
3225     int i;
3226     Z_DeleteResultSetRequest *req =
3227         reqb->apdu_request->u.deleteResultSetRequest;
3228     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3229         odr_malloc (assoc->encode, sizeof(*res));
3230     bend_delete_rr *bdrr = (bend_delete_rr *)
3231         odr_malloc (assoc->encode, sizeof(*bdrr));
3232     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3233
3234     yaz_log(log_requestdetail, "Got DeleteRequest.");
3235
3236     bdrr->num_setnames = req->num_resultSetList;
3237     bdrr->setnames = req->resultSetList;
3238     for (i = 0; i<req->num_resultSetList; i++)
3239         yaz_log(log_requestdetail, "resultset: '%s'",
3240                 req->resultSetList[i]);
3241     bdrr->stream = assoc->encode;
3242     bdrr->print = assoc->print;
3243     bdrr->function = *req->deleteFunction;
3244     bdrr->referenceId = req->referenceId;
3245     bdrr->statuses = 0;
3246     if (bdrr->num_setnames > 0)
3247     {
3248         bdrr->statuses = (int*)
3249             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3250                        bdrr->num_setnames);
3251         for (i = 0; i < bdrr->num_setnames; i++)
3252             bdrr->statuses[i] = 0;
3253     }
3254     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3255
3256     res->referenceId = req->referenceId;
3257
3258     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3259
3260     res->deleteListStatuses = 0;
3261     if (bdrr->num_setnames > 0)
3262     {
3263         int i;
3264         res->deleteListStatuses = (Z_ListStatuses *)
3265             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3266         res->deleteListStatuses->num = bdrr->num_setnames;
3267         res->deleteListStatuses->elements =
3268             (Z_ListStatus **)
3269             odr_malloc (assoc->encode,
3270                         sizeof(*res->deleteListStatuses->elements) *
3271                         bdrr->num_setnames);
3272         for (i = 0; i<bdrr->num_setnames; i++)
3273         {
3274             res->deleteListStatuses->elements[i] =
3275                 (Z_ListStatus *)
3276                 odr_malloc (assoc->encode,
3277                             sizeof(**res->deleteListStatuses->elements));
3278             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3279             res->deleteListStatuses->elements[i]->id =
3280                 odr_strdup (assoc->encode, bdrr->setnames[i]);
3281         }
3282     }
3283     res->numberNotDeleted = 0;
3284     res->bulkStatuses = 0;
3285     res->deleteMessage = 0;
3286     res->otherInfo = 0;
3287
3288     apdu->which = Z_APDU_deleteResultSetResponse;
3289     apdu->u.deleteResultSetResponse = res;
3290     if (log_request)
3291     {
3292         WRBUF wr = wrbuf_alloc();
3293         wrbuf_printf(wr, "Delete ");
3294         if (bdrr->delete_status)
3295             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3296         else
3297             wrbuf_printf(wr, "OK -");
3298         for (i = 0; i<req->num_resultSetList; i++)
3299             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3300         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3301         wrbuf_free(wr, 1);
3302     }
3303     return apdu;
3304 }
3305
3306 static void process_close(association *assoc, request *reqb)
3307 {
3308     Z_Close *req = reqb->apdu_request->u.close;
3309     static char *reasons[] =
3310     {
3311         "finished",
3312         "shutdown",
3313         "systemProblem",
3314         "costLimit",
3315         "resources",
3316         "securityViolation",
3317         "protocolError",
3318         "lackOfActivity",
3319         "peerAbort",
3320         "unspecified"
3321     };
3322
3323     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3324         reasons[*req->closeReason], req->diagnosticInformation ?
3325         req->diagnosticInformation : "NULL");
3326     if (assoc->version < 3) /* to make do_force respond with close */
3327         assoc->version = 3;
3328     do_close_req(assoc, Z_Close_finished,
3329                  "Association terminated by client", reqb);
3330     yaz_log(log_request,"Close OK");
3331 }
3332
3333 void save_referenceId (request *reqb, Z_ReferenceId *refid)
3334 {
3335     if (refid)
3336     {
3337         reqb->len_refid = refid->len;
3338         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
3339         memcpy (reqb->refid, refid->buf, refid->len);
3340     }
3341     else
3342     {
3343         reqb->len_refid = 0;
3344         reqb->refid = NULL;
3345     }
3346 }
3347
3348 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
3349 {
3350     process_z_response (a, req, res);
3351 }
3352
3353 bend_request bend_request_mk (bend_association a)
3354 {
3355     request *nreq = request_get (&a->outgoing);
3356     nreq->request_mem = nmem_create ();
3357     return nreq;
3358 }
3359
3360 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
3361 {
3362     Z_ReferenceId *id;
3363     if (!req->refid)
3364         return 0;
3365     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
3366     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
3367     id->len = id->size = req->len_refid;
3368     memcpy (id->buf, req->refid, req->len_refid);
3369     return id;
3370 }
3371
3372 void bend_request_destroy (bend_request *req)
3373 {
3374     nmem_destroy((*req)->request_mem);
3375     request_release(*req);
3376     *req = NULL;
3377 }
3378
3379 int bend_backend_respond (bend_association a, bend_request req)
3380 {
3381     char *msg;
3382     int r;
3383     r = process_z_request (a, req, &msg);
3384     if (r < 0)
3385         yaz_log (YLOG_WARN, "%s", msg);
3386     return r;
3387 }
3388
3389 void bend_request_setdata(bend_request r, void *p)
3390 {
3391     r->clientData = p;
3392 }
3393
3394 void *bend_request_getdata(bend_request r)
3395 {
3396     return r->clientData;
3397 }
3398
3399 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
3400 {
3401     bend_segment_rr req;
3402
3403     req.segment = reqb->apdu_request->u.segmentRequest;
3404     req.stream = assoc->encode;
3405     req.decode = assoc->decode;
3406     req.print = assoc->print;
3407     req.association = assoc;
3408
3409     (*assoc->init->bend_segment)(assoc->backend, &req);
3410
3411     return 0;
3412 }
3413
3414 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3415 {
3416     bend_esrequest_rr esrequest;
3417     const char *ext_name = "unknown";
3418
3419     Z_ExtendedServicesRequest *req =
3420         reqb->apdu_request->u.extendedServicesRequest;
3421     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3422
3423     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3424
3425     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3426     esrequest.stream = assoc->encode;
3427     esrequest.decode = assoc->decode;
3428     esrequest.print = assoc->print;
3429     esrequest.errcode = 0;
3430     esrequest.errstring = NULL;
3431     esrequest.request = reqb;
3432     esrequest.association = assoc;
3433     esrequest.taskPackage = 0;
3434     esrequest.referenceId = req->referenceId;
3435
3436
3437     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3438     {
3439         switch(esrequest.esr->taskSpecificParameters->which)
3440         {
3441         case Z_External_itemOrder:
3442             ext_name = "ItemOrder"; break;
3443         case Z_External_update:
3444             ext_name = "Update"; break;
3445         case Z_External_update0:
3446             ext_name = "Update0"; break;
3447         case Z_External_ESAdmin:
3448             ext_name = "Admin"; break;
3449
3450         }
3451     }
3452
3453     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3454
3455     /* If the response is being delayed, return NULL */
3456     if (esrequest.request == NULL)
3457         return(NULL);
3458
3459     resp->referenceId = req->referenceId;
3460
3461     if (esrequest.errcode == -1)
3462     {
3463         /* Backend service indicates request will be processed */
3464         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3465         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3466     }
3467     else if (esrequest.errcode == 0)
3468     {
3469         /* Backend service indicates request will be processed */
3470         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3471         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3472     }
3473     else
3474     {
3475         Z_DiagRecs *diagRecs =
3476             zget_DiagRecs(assoc->encode, esrequest.errcode,
3477                           esrequest.errstring);
3478         /* Backend indicates error, request will not be processed */
3479         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3480         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3481         resp->num_diagnostics = diagRecs->num_diagRecs;
3482         resp->diagnostics = diagRecs->diagRecs;
3483         if (log_request)
3484         {
3485             WRBUF wr = wrbuf_alloc();
3486             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3487             yaz_log(log_request, "EsRequest %s", wrbuf_buf(wr) );
3488             wrbuf_free(wr, 1);
3489         }
3490
3491     }
3492     /* Do something with the members of bend_extendedservice */
3493     if (esrequest.taskPackage)
3494         resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED,
3495                                          (const char *)  esrequest.taskPackage,
3496                                           -1);
3497     yaz_log(YLOG_DEBUG,"Send the result apdu");
3498     return apdu;
3499 }
3500
3501 /*
3502  * Local variables:
3503  * c-basic-offset: 4
3504  * indent-tabs-mode: nil
3505  * End:
3506  * vim: shiftwidth=4 tabstop=8 expandtab
3507  */
3508