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 1.98 2006-09-06 09:35:41 adam Exp $
   6  */
   7 /**
   8  * \file seshigh.c
   9  * \brief Implements GFS session logic.
  10  *
  11  * Frontend server logic.
  12  *
  13  * This code receives incoming APDUs, and handles client requests by means
  14  * of the backend API.
  15  *
  16  * Some of the code is getting quite involved, compared to simpler servers -
  17  * primarily because it is asynchronous both in the communication with
  18  * the user and the backend. We think the complexity will pay off in
  19  * the form of greater flexibility when more asynchronous facilities
  20  * are implemented.
  21  *
  22  * Memory management has become somewhat involved. In the simple case, where
  23  * only one PDU is pending at a time, it will simply reuse the same memory,
  24  * once it has found its working size. When we enable multiple concurrent
  25  * operations, perhaps even with multiple parallel calls to the backend, it
  26  * will maintain a pool of buffers for encoding and decoding, trying to
  27  * minimize memory allocation/deallocation during normal operation.
  28  *
  29  */
  30
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <assert.h>
  34 #include <ctype.h>
  35
  36 #if HAVE_SYS_TYPES_H
  37 #include <sys/types.h>
  38 #endif
  39 #if HAVE_SYS_STAT_H
  40 #include <sys/stat.h>
  41 #endif
  42
  43 #ifdef WIN32
  44 #include <io.h>
  45 #define S_ISREG(x) (x & _S_IFREG)
  46 #include <process.h>
  47 #endif
  48
  49 #if HAVE_UNISTD_H
  50 #include <unistd.h>
  51 #endif
  52
  53 #if YAZ_HAVE_XML2
  54 #include <libxml/parser.h>
  55 #include <libxml/tree.h>
  56 #endif
  57
  58 #include <yaz/yconfig.h>
  59 #include <yaz/xmalloc.h>
  60 #include <yaz/comstack.h>
  61 #include "eventl.h"
  62 #include "session.h"
  63 #include "mime.h"
  64 #include <yaz/proto.h>
  65 #include <yaz/oid.h>
  66 #include <yaz/log.h>
  67 #include <yaz/logrpn.h>
  68 #include <yaz/querytowrbuf.h>
  69 #include <yaz/statserv.h>
  70 #include <yaz/diagbib1.h>
  71 #include <yaz/charneg.h>
  72 #include <yaz/otherinfo.h>
  73 #include <yaz/yaz-util.h>
  74 #include <yaz/pquery.h>
  75
  76 #include <yaz/srw.h>
  77 #include <yaz/backend.h>
  78
  79 static void process_gdu_request(association *assoc, request *req);
  80 static int process_z_request(association *assoc, request *req, char **msg);
  81 void backend_response(IOCHAN i, int event);
  82 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  83 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  84 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  85 static Z_External *init_diagnostics(ODR odr, int errcode,
  86                                     const char *errstring);
  87 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
  88     int *fd);
  89 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  90     bend_search_rr *bsrr, int *fd);
  91 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
  92     int *fd);
  93 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
  94 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
  95 static void process_close(association *assoc, request *reqb);
  96 void save_referenceId (request *reqb, Z_ReferenceId *refid);
  97 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
  98     int *fd);
  99 static Z_APDU *process_segmentRequest (association *assoc, request *reqb);
 100
 101 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
 102
 103 /* dynamic logging levels */
 104 static int logbits_set = 0;
 105 static int log_session = 0; /* one-line logs for session */
 106 static int log_sessiondetail = 0; /* more detailed stuff */
 107 static int log_request = 0; /* one-line logs for requests */
 108 static int log_requestdetail = 0;  /* more detailed stuff */
 109
 110 /** get_logbits sets global loglevel bits */
 111 static void get_logbits()
 112 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 113     if (!logbits_set)
 114     {
 115         logbits_set = 1;
 116         log_session = yaz_log_module_level("session");
 117         log_sessiondetail = yaz_log_module_level("sessiondetail");
 118         log_request = yaz_log_module_level("request");
 119         log_requestdetail = yaz_log_module_level("requestdetail");
 120     }
 121 }
 122
 123
 124
 125 static void wr_diag(WRBUF w, int error, const char *addinfo)
 126 {
 127     wrbuf_printf(w, "ERROR %d+", error);
 128     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
 129     if (addinfo){
 130         wrbuf_puts(w, "+");
 131         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
 132     }
 133
 134     wrbuf_puts(w, " ");
 135 }
 136
 137
 138 /*
 139  * Create and initialize a new association-handle.
 140  *  channel  : iochannel for the current line.
 141  *  link     : communications channel.
 142  * Returns: 0 or a new association handle.
 143  */
 144 association *create_association(IOCHAN channel, COMSTACK link,
 145                                 const char *apdufile)
 146 {
 147     association *anew;
 148
 149     if (!logbits_set)
 150         get_logbits();
 151     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 152         return 0;
 153     anew->init = 0;
 154     anew->version = 0;
 155     anew->last_control = 0;
 156     anew->client_chan = channel;
 157     anew->client_link = link;
 158     anew->cs_get_mask = 0;
 159     anew->cs_put_mask = 0;
 160     anew->cs_accept_mask = 0;
 161     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 162         !(anew->encode = odr_createmem(ODR_ENCODE)))
 163         return 0;
 164     if (apdufile && *apdufile)
 165     {
 166         FILE *f;
 167
 168         if (!(anew->print = odr_createmem(ODR_PRINT)))
 169             return 0;
 170         if (*apdufile == '@')
 171         {
 172             odr_setprint(anew->print, yaz_log_file());
 173         }
 174         else if (*apdufile != '-')
 175         {
 176             char filename[256];
 177             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 178             if (!(f = fopen(filename, "w")))
 179             {
 180                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 181                 return 0;
 182             }
 183             setvbuf(f, 0, _IONBF, 0);
 184             odr_setprint(anew->print, f);
 185         }
 186     }
 187     else
 188         anew->print = 0;
 189     anew->input_buffer = 0;
 190     anew->input_buffer_len = 0;
 191     anew->backend = 0;
 192     anew->state = ASSOC_NEW;
 193     request_initq(&anew->incoming);
 194     request_initq(&anew->outgoing);
 195     anew->proto = cs_getproto(link);
 196     anew->server = 0;
 197     return anew;
 198 }
 199
 200 /*
 201  * Free association and release resources.
 202  */
 203 void destroy_association(association *h)
 204 {
 205     statserv_options_block *cb = statserv_getcontrol();
 206     request *req;
 207
 208     xfree(h->init);
 209     odr_destroy(h->decode);
 210     odr_destroy(h->encode);
 211     if (h->print)
 212         odr_destroy(h->print);
 213     if (h->input_buffer)
 214     xfree(h->input_buffer);
 215     if (h->backend)
 216         (*cb->bend_close)(h->backend);
 217     while ((req = request_deq(&h->incoming)))
 218         request_release(req);
 219     while ((req = request_deq(&h->outgoing)))
 220         request_release(req);
 221     request_delq(&h->incoming);
 222     request_delq(&h->outgoing);
 223     xfree(h);
 224     xmalloc_trav("session closed");
 225     if (cb && cb->one_shot)
 226     {
 227         exit (0);
 228     }
 229 }
 230
 231 static void do_close_req(association *a, int reason, char *message,
 232                          request *req)
 233 {
 234     Z_APDU apdu;
 235     Z_Close *cls = zget_Close(a->encode);
 236
 237     /* Purge request queue */
 238     while (request_deq(&a->incoming));
 239     while (request_deq(&a->outgoing));
 240     if (a->version >= 3)
 241     {
 242         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 243             reason, message ? message : "none");
 244         apdu.which = Z_APDU_close;
 245         apdu.u.close = cls;
 246         *cls->closeReason = reason;
 247         cls->diagnosticInformation = message;
 248         process_z_response(a, req, &apdu);
 249         iochan_settimeout(a->client_chan, 20);
 250     }
 251     else
 252     {
 253         request_release(req);
 254         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 255         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 256         a->cs_put_mask = 0;
 257     }
 258     a->state = ASSOC_DEAD;
 259 }
 260
 261 static void do_close(association *a, int reason, char *message)
 262 {
 263     request *req = request_get(&a->outgoing);
 264     do_close_req (a, reason, message, req);
 265 }
 266
 267 /*
 268  * This is where PDUs from the client are read and the further
 269  * processing is initiated. Flow of control moves down through the
 270  * various process_* functions below, until the encoded result comes back up
 271  * to the output handler in here.
 272  *
 273  *  h     : the I/O channel that has an outstanding event.
 274  *  event : the current outstanding event.
 275  */
 276 void ir_session(IOCHAN h, int event)
 277 {
 278     int res;
 279     association *assoc = (association *)iochan_getdata(h);
 280     COMSTACK conn = assoc->client_link;
 281     request *req;
 282
 283     assert(h && conn && assoc);
 284     if (event == EVENT_TIMEOUT)
 285     {
 286         if (assoc->state != ASSOC_UP)
 287         {
 288             yaz_log(YLOG_DEBUG, "Final timeout - closing connection.");
 289             /* do we need to lod this at all */
 290             cs_close(conn);
 291             destroy_association(assoc);
 292             iochan_destroy(h);
 293         }
 294         else
 295         {
 296             yaz_log(log_sessiondetail,
 297                     "Session idle too long. Sending close.");
 298             do_close(assoc, Z_Close_lackOfActivity, 0);
 299         }
 300         return;
 301     }
 302     if (event & assoc->cs_accept_mask)
 303     {
 304         if (!cs_accept (conn))
 305         {
 306             yaz_log (YLOG_WARN, "accept failed");
 307             destroy_association(assoc);
 308             iochan_destroy(h);
 309         }
 310         iochan_clearflag (h, EVENT_OUTPUT);
 311         if (conn->io_pending)
 312         {   /* cs_accept didn't complete */
 313             assoc->cs_accept_mask =
 314                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 315                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 316
 317             iochan_setflag (h, assoc->cs_accept_mask);
 318         }
 319         else
 320         {   /* cs_accept completed. Prepare for reading (cs_get) */
 321             assoc->cs_accept_mask = 0;
 322             assoc->cs_get_mask = EVENT_INPUT;
 323             iochan_setflag (h, assoc->cs_get_mask);
 324         }
 325         return;
 326     }
 327     if ((event & assoc->cs_get_mask) || (event & EVENT_WORK)) /* input */
 328     {
 329         if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 330         {
 331             yaz_log(YLOG_DEBUG, "ir_session (input)");
 332             /* We aren't speaking to this fellow */
 333             if (assoc->state == ASSOC_DEAD)
 334             {
 335                 yaz_log(log_sessiondetail, "Connection closed - end of session");
 336                 cs_close(conn);
 337                 destroy_association(assoc);
 338                 iochan_destroy(h);
 339                 return;
 340             }
 341             assoc->cs_get_mask = EVENT_INPUT;
 342             res = cs_get(conn, &assoc->input_buffer,
 343                 &assoc->input_buffer_len);
 344             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 345             {
 346                 yaz_log(log_session, "Connection error: %s res=%d",
 347                         cs_errmsg(cs_errno(conn)), res);
 348                 req = request_get(&assoc->incoming); /* get a new request */
 349                 do_close_req(assoc, Z_Close_protocolError,
 350                              "Incoming package too large", req);
 351                 return;
 352             }
 353             else if (res <= 0)
 354             {
 355                 yaz_log(log_sessiondetail, "Connection closed by client");
 356                 cs_close(conn);
 357                 destroy_association(assoc);
 358                 iochan_destroy(h);
 359                 return;
 360             }
 361             else if (res == 1) /* incomplete read - wait for more  */
 362             {
 363                 if (conn->io_pending & CS_WANT_WRITE)
 364                     assoc->cs_get_mask |= EVENT_OUTPUT;
 365                 iochan_setflag(h, assoc->cs_get_mask);
 366                 return;
 367             }
 368             if (cs_more(conn)) /* more stuff - call us again later, please */
 369                 iochan_setevent(h, EVENT_INPUT);
 370
 371             /* we got a complete PDU. Let's decode it */
 372             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 373                             assoc->input_buffer[0] & 0xff,
 374                             assoc->input_buffer[1] & 0xff,
 375                             assoc->input_buffer[2] & 0xff);
 376             req = request_get(&assoc->incoming); /* get a new request */
 377             odr_reset(assoc->decode);
 378             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 379             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 380             {
 381                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 382                         "[near byte %ld] ",
 383                         odr_errmsg(odr_geterror(assoc->decode)),
 384                         odr_getelement(assoc->decode),
 385                         (long) odr_offset(assoc->decode));
 386                 if (assoc->decode->error != OHTTP)
 387                 {
 388                     yaz_log(YLOG_WARN, "PDU dump:");
 389                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 390                     request_release(req);
 391                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 392                 }
 393                 else
 394                 {
 395                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 396                     assoc->state = ASSOC_DEAD;
 397                     process_gdu_response(assoc, req, p);
 398                 }
 399                 return;
 400             }
 401             req->request_mem = odr_extract_mem(assoc->decode);
 402             if (assoc->print)
 403             {
 404                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 405                     yaz_log(YLOG_WARN, "ODR print error: %s",
 406                        odr_errmsg(odr_geterror(assoc->print)));
 407                 odr_reset(assoc->print);
 408             }
 409             request_enq(&assoc->incoming, req);
 410         }
 411
 412         /* can we do something yet? */
 413         req = request_head(&assoc->incoming);
 414         if (req->state == REQUEST_IDLE)
 415         {
 416             request_deq(&assoc->incoming);
 417             process_gdu_request(assoc, req);
 418         }
 419     }
 420     if (event & assoc->cs_put_mask)
 421     {
 422         request *req = request_head(&assoc->outgoing);
 423
 424         assoc->cs_put_mask = 0;
 425         yaz_log(YLOG_DEBUG, "ir_session (output)");
 426         req->state = REQUEST_PENDING;
 427         switch (res = cs_put(conn, req->response, req->len_response))
 428         {
 429         case -1:
 430             yaz_log(log_sessiondetail, "Connection closed by client");
 431             cs_close(conn);
 432             destroy_association(assoc);
 433             iochan_destroy(h);
 434             break;
 435         case 0: /* all sent - release the request structure */
 436             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 437 #if 0
 438             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 439                     req->response);
 440 #endif
 441             nmem_destroy(req->request_mem);
 442             request_deq(&assoc->outgoing);
 443             request_release(req);
 444             if (!request_head(&assoc->outgoing))
 445             {   /* restore mask for cs_get operation ... */
 446                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 447                 iochan_setflag(h, assoc->cs_get_mask);
 448                 if (assoc->state == ASSOC_DEAD)
 449                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 450             }
 451             else
 452             {
 453                 assoc->cs_put_mask = EVENT_OUTPUT;
 454             }
 455             break;
 456         default:
 457             if (conn->io_pending & CS_WANT_WRITE)
 458                 assoc->cs_put_mask |= EVENT_OUTPUT;
 459             if (conn->io_pending & CS_WANT_READ)
 460                 assoc->cs_put_mask |= EVENT_INPUT;
 461             iochan_setflag(h, assoc->cs_put_mask);
 462         }
 463     }
 464     if (event & EVENT_EXCEPT)
 465     {
 466         yaz_log(YLOG_WARN, "ir_session (exception)");
 467         cs_close(conn);
 468         destroy_association(assoc);
 469         iochan_destroy(h);
 470     }
 471 }
 472
 473 static int process_z_request(association *assoc, request *req, char **msg);
 474
 475
 476 static void assoc_init_reset(association *assoc)
 477 {
 478     xfree (assoc->init);
 479     assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init));
 480
 481     assoc->init->stream = assoc->encode;
 482     assoc->init->print = assoc->print;
 483     assoc->init->auth = 0;
 484     assoc->init->referenceId = 0;
 485     assoc->init->implementation_version = 0;
 486     assoc->init->implementation_id = 0;
 487     assoc->init->implementation_name = 0;
 488     assoc->init->bend_sort = NULL;
 489     assoc->init->bend_search = NULL;
 490     assoc->init->bend_present = NULL;
 491     assoc->init->bend_esrequest = NULL;
 492     assoc->init->bend_delete = NULL;
 493     assoc->init->bend_scan = NULL;
 494     assoc->init->bend_segment = NULL;
 495     assoc->init->bend_fetch = NULL;
 496     assoc->init->bend_explain = NULL;
 497     assoc->init->bend_srw_scan = NULL;
 498     assoc->init->bend_srw_update = NULL;
 499
 500     assoc->init->charneg_request = NULL;
 501     assoc->init->charneg_response = NULL;
 502
 503     assoc->init->decode = assoc->decode;
 504     assoc->init->peer_name =
 505         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
 506
 507     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 508 }
 509
 510 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 511 {
 512     statserv_options_block *cb = statserv_getcontrol();
 513     if (!assoc->init)
 514     {
 515         const char *encoding = "UTF-8";
 516         Z_External *ce;
 517         bend_initresult *binitres;
 518
 519         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 520         assoc_init_reset(assoc);
 521
 522         if (sr->username)
 523         {
 524             Z_IdAuthentication *auth = odr_malloc(assoc->decode, sizeof(*auth));
 525             int len;
 526
 527             len = strlen(sr->username) + 1;
 528             if (sr->password)
 529                 len += strlen(sr->password) + 2;
 530             auth->which = Z_IdAuthentication_open;
 531             auth->u.open = odr_malloc(assoc->decode, len);
 532             strcpy(auth->u.open, sr->username);
 533             if (sr->password && *sr->password)
 534             {
 535                 strcat(auth->u.open, "/");
 536                 strcat(auth->u.open, sr->password);
 537             }
 538             assoc->init->auth = auth;
 539         }
 540
 541 #if 1
 542         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 543         assoc->init->charneg_request = ce->u.charNeg3;
 544 #endif
 545         assoc->backend = 0;
 546         if (!(binitres = (*cb->bend_init)(assoc->init)))
 547         {
 548             assoc->state = ASSOC_DEAD;
 549             yaz_add_srw_diagnostic(assoc->encode, d, num,
 550                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 551             return 0;
 552         }
 553         assoc->backend = binitres->handle;
 554         assoc->init->auth = 0;
 555         if (binitres->errcode)
 556         {
 557             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 558             assoc->state = ASSOC_DEAD;
 559             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 560                                    binitres->errstring);
 561             return 0;
 562         }
 563         return 1;
 564     }
 565     return 1;
 566 }
 567
 568 static const char *get_esn(Z_RecordComposition *comp)
 569 {
 570     if (comp && comp->which == Z_RecordComp_complex)
 571     {
 572         if (comp->u.complex->generic
 573             && comp->u.complex->generic->elementSpec
 574             && (comp->u.complex->generic->elementSpec->which ==
 575                 Z_ElementSpec_elementSetName))
 576             return comp->u.complex->generic->elementSpec->u.elementSetName;
 577     }
 578     else if (comp && comp->which == Z_RecordComp_simple &&
 579              comp->u.simple->which == Z_ElementSetNames_generic)
 580         return comp->u.simple->u.generic;
 581     return 0;
 582 }
 583
 584 static void set_esn(Z_RecordComposition **comp_p, const char *esn, NMEM nmem)
 585 {
 586     Z_RecordComposition *comp = nmem_malloc(nmem, sizeof(*comp));
 587
 588     comp->which = Z_RecordComp_simple;
 589     comp->u.simple = nmem_malloc(nmem, sizeof(*comp->u.simple));
 590     comp->u.simple->which = Z_ElementSetNames_generic;
 591     comp->u.simple->u.generic = nmem_strdup(nmem, esn);
 592     *comp_p = comp;
 593 }
 594
 595 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 596 {
 597 #if YAZ_HAVE_XML2
 598     yaz_record_conv_t rc = 0;
 599     const char *match_schema = 0;
 600     int *match_syntax = 0;
 601
 602     if (assoc->server)
 603     {
 604         int r;
 605         const char *input_schema = get_esn(rr->comp);
 606         Odr_oid *input_syntax_raw = rr->request_format_raw;
 607
 608         const char *backend_schema = 0;
 609         Odr_oid *backend_syntax = 0;
 610
 611         r = yaz_retrieval_request(assoc->server->retrieval,
 612                                   input_schema,
 613                                   input_syntax_raw,
 614                                   &match_schema,
 615                                   &match_syntax,
 616                                   &rc,
 617                                   &backend_schema,
 618                                   &backend_syntax);
 619         if (r == -1) /* error ? */
 620         {
 621             const char *details = yaz_retrieval_get_error(
 622                 assoc->server->retrieval);
 623
 624             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 625             if (details)
 626                 rr->errstring = odr_strdup(rr->stream, details);
 627             return -1;
 628         }
 629         else if (r == 1 || r == 3)
 630         {
 631             const char *details = input_schema;
 632             rr->errcode =  YAZ_BIB1_ELEMENT_SET_NAMES_UNSUPP;
 633             if (details)
 634                 rr->errstring = odr_strdup(rr->stream, details);
 635             return -1;
 636         }
 637         else if (r == 2)
 638         {
 639             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 640             if (input_syntax_raw)
 641             {
 642                 char oidbuf[OID_STR_MAX];
 643                 oid_to_dotstring(input_syntax_raw, oidbuf);
 644                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 645             }
 646             return -1;
 647         }
 648         if (backend_schema)
 649         {
 650             set_esn(&rr->comp, backend_schema, rr->stream->mem);
 651         }
 652         if (backend_syntax)
 653         {
 654             oident *oident_syntax = oid_getentbyoid(backend_syntax);
 655
 656             rr->request_format_raw = backend_syntax;
 657
 658             if (oident_syntax)
 659                 rr->request_format = oident_syntax->value;
 660             else
 661                 rr->request_format = VAL_NONE;
 662         }
 663     }
 664     (*assoc->init->bend_fetch)(assoc->backend, rr);
 665     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
 666     {   /* post conversion must take place .. */
 667         WRBUF output_record = wrbuf_alloc();
 668         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 669         if (r)
 670         {
 671             const char *details = yaz_record_conv_get_error(rc);
 672             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 673             if (details)
 674                 rr->errstring = odr_strdup(rr->stream, details);
 675         }
 676         else
 677         {
 678             rr->len = wrbuf_len(output_record);
 679             rr->record = odr_malloc(rr->stream, rr->len);
 680             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 681         }
 682         wrbuf_free(output_record, 1);
 683     }
 684     if (match_syntax)
 685     {
 686         struct oident *oi = oid_getentbyoid(match_syntax);
 687         rr->output_format = oi ? oi->value : VAL_NONE;
 688         rr->output_format_raw = match_syntax;
 689     }
 690     if (match_schema)
 691         rr->schema = odr_strdup(rr->stream, match_schema);
 692     return 0;
 693 #else
 694     (*assoc->init->bend_fetch)(assoc->backend, rr);
 695 #endif
 696 }
 697
 698 static int srw_bend_fetch(association *assoc, int pos,
 699                           Z_SRW_searchRetrieveRequest *srw_req,
 700                           Z_SRW_record *record,
 701                           const char **addinfo)
 702 {
 703     bend_fetch_rr rr;
 704     ODR o = assoc->encode;
 705
 706     rr.setname = "default";
 707     rr.number = pos;
 708     rr.referenceId = 0;
 709     rr.request_format = VAL_TEXT_XML;
 710     rr.request_format_raw = yaz_oidval_to_z3950oid(assoc->decode,
 711                                                    CLASS_RECSYN,
 712                                                    VAL_TEXT_XML);
 713     rr.comp = (Z_RecordComposition *)
 714             odr_malloc(assoc->decode, sizeof(*rr.comp));
 715     rr.comp->which = Z_RecordComp_complex;
 716     rr.comp->u.complex = (Z_CompSpec *)
 717             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 718     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 719         odr_malloc(assoc->encode, sizeof(bool_t));
 720     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 721     rr.comp->u.complex->num_dbSpecific = 0;
 722     rr.comp->u.complex->dbSpecific = 0;
 723     rr.comp->u.complex->num_recordSyntax = 0;
 724     rr.comp->u.complex->recordSyntax = 0;
 725
 726     rr.comp->u.complex->generic = (Z_Specification *)
 727             odr_malloc(assoc->decode, sizeof(Z_Specification));
 728
 729     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 730     rr.comp->u.complex->generic->which = Z_Schema_uri;
 731     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 732
 733     /* ESN = recordSchema if recordSchema is present */
 734     rr.comp->u.complex->generic->elementSpec = 0;
 735     if (srw_req->recordSchema)
 736     {
 737         rr.comp->u.complex->generic->elementSpec =
 738             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 739         rr.comp->u.complex->generic->elementSpec->which =
 740             Z_ElementSpec_elementSetName;
 741         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 742             srw_req->recordSchema;
 743     }
 744
 745     rr.stream = assoc->encode;
 746     rr.print = assoc->print;
 747
 748     rr.basename = 0;
 749     rr.len = 0;
 750     rr.record = 0;
 751     rr.last_in_set = 0;
 752     rr.errcode = 0;
 753     rr.errstring = 0;
 754     rr.surrogate_flag = 0;
 755     rr.schema = srw_req->recordSchema;
 756
 757     if (!assoc->init->bend_fetch)
 758         return 1;
 759
 760     retrieve_fetch(assoc, &rr);
 761
 762     if (rr.errcode && rr.surrogate_flag)
 763     {
 764         int code = yaz_diag_bib1_to_srw(rr.errcode);
 765         const char *message = yaz_diag_srw_str(code);
 766         int len = 200;
 767         if (message)
 768             len += strlen(message);
 769         if (rr.errstring)
 770             len += strlen(rr.errstring);
 771
 772         record->recordData_buf = odr_malloc(o, len);
 773
 774         sprintf(record->recordData_buf, "<diagnostic "
 775                 "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
 776                 " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
 777         if (rr.errstring)
 778             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 779                     " <details>%s</details>\n", rr.errstring);
 780         if (message)
 781             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 782                     " <message>%s</message>\n", message);
 783         sprintf(record->recordData_buf + strlen(record->recordData_buf),
 784                 "</diagnostic>\n");
 785         record->recordData_len = strlen(record->recordData_buf);
 786         record->recordPosition = odr_intdup(o, pos);
 787         record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
 788         return 0;
 789     }
 790     else if (rr.len >= 0)
 791     {
 792         record->recordData_buf = rr.record;
 793         record->recordData_len = rr.len;
 794         record->recordPosition = odr_intdup(o, pos);
 795         if (rr.schema)
 796             record->recordSchema = odr_strdup(o, rr.schema);
 797         else
 798             record->recordSchema = 0;
 799     }
 800     if (rr.errcode)
 801     {
 802         *addinfo = rr.errstring;
 803         return rr.errcode;
 804     }
 805     return 0;
 806 }
 807
 808 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 809                    Z_Query *query_result)
 810 {
 811     /* have a CQL query and  CQL to PQF transform .. */
 812     CQL_parser cp = cql_parser_create();
 813     int r;
 814     int srw_errcode = 0;
 815     const char *add = 0;
 816     char rpn_buf[5120];
 817
 818     r = cql_parser_string(cp, cql);
 819     if (r)
 820     {
 821         /* CQL syntax error */
 822         srw_errcode = 10;
 823     }
 824     if (!r)
 825     {
 826         /* Syntax OK */
 827         r = cql_transform_buf(ct,
 828                               cql_parser_result(cp),
 829                               rpn_buf, sizeof(rpn_buf)-1);
 830         if (r)
 831             srw_errcode  = cql_transform_error(ct, &add);
 832     }
 833     if (!r)
 834     {
 835         /* Syntax & transform OK. */
 836         /* Convert PQF string to Z39.50 to RPN query struct */
 837         YAZ_PQF_Parser pp = yaz_pqf_create();
 838         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 839         if (!rpnquery)
 840         {
 841             size_t off;
 842             const char *pqf_msg;
 843             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 844             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 845                     pqf_msg, code);
 846             srw_errcode = 10;
 847         }
 848         else
 849         {
 850             query_result->which = Z_Query_type_1;
 851             query_result->u.type_1 = rpnquery;
 852         }
 853         yaz_pqf_destroy(pp);
 854     }
 855     cql_parser_destroy(cp);
 856     return srw_errcode;
 857 }
 858
 859 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 860                         Z_AttributesPlusTerm *result)
 861 {
 862     Z_Query query;
 863     Z_RPNQuery *rpn;
 864     int srw_error = cql2pqf(odr, cql, ct, &query);
 865     if (srw_error)
 866         return srw_error;
 867     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 868         return 10; /* bad query type */
 869     rpn = query.u.type_1;
 870     if (!rpn->RPNStructure)
 871         return 10; /* must be structure */
 872     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 873         return 10; /* must be simple */
 874     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 875         return 10; /* must be attributes plus term node .. */
 876     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 877            sizeof(*result));
 878     return 0;
 879 }
 880
 881 static void srw_bend_search(association *assoc, request *req,
 882                             Z_SRW_PDU *sr,
 883                             Z_SRW_searchRetrieveResponse *srw_res,
 884                             int *http_code)
 885 {
 886     int srw_error = 0;
 887     Z_External *ext;
 888     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 889
 890     *http_code = 200;
 891     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 892     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 893     if (srw_res->num_diagnostics == 0 && assoc->init)
 894     {
 895         bend_search_rr rr;
 896         rr.setname = "default";
 897         rr.replace_set = 1;
 898         rr.num_bases = 1;
 899         rr.basenames = &srw_req->database;
 900         rr.referenceId = 0;
 901         rr.srw_sortKeys = 0;
 902         rr.srw_setname = 0;
 903         rr.srw_setnameIdleTime = 0;
 904         rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 905         rr.query->u.type_1 = 0;
 906
 907         if (srw_req->query_type == Z_SRW_query_type_cql)
 908         {
 909             if (assoc->server && assoc->server->cql_transform)
 910             {
 911                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 912                                           assoc->server->cql_transform,
 913                                           rr.query);
 914                 if (srw_errcode)
 915                 {
 916                     yaz_add_srw_diagnostic(assoc->encode,
 917                                            &srw_res->diagnostics,
 918                                            &srw_res->num_diagnostics,
 919                                            srw_errcode, 0);
 920                 }
 921             }
 922             else
 923             {
 924                 /* CQL query to backend. Wrap it - Z39.50 style */
 925                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 926                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 927                                                         "1.2.840.10003.16.2");
 928                 ext->indirect_reference = 0;
 929                 ext->descriptor = 0;
 930                 ext->which = Z_External_CQL;
 931                 ext->u.cql = srw_req->query.cql;
 932
 933                 rr.query->which = Z_Query_type_104;
 934                 rr.query->u.type_104 =  ext;
 935             }
 936         }
 937         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 938         {
 939             Z_RPNQuery *RPNquery;
 940             YAZ_PQF_Parser pqf_parser;
 941
 942             pqf_parser = yaz_pqf_create ();
 943
 944             RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
 945                                       srw_req->query.pqf);
 946             if (!RPNquery)
 947             {
 948                 const char *pqf_msg;
 949                 size_t off;
 950                 int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
 951                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 952                         code, pqf_msg, (long) off);
 953                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 954             }
 955
 956             rr.query->which = Z_Query_type_1;
 957             rr.query->u.type_1 =  RPNquery;
 958
 959             yaz_pqf_destroy (pqf_parser);
 960         }
 961         else
 962         {
 963             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 964                                    &srw_res->num_diagnostics,
 965                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 966         }
 967         if (rr.query->u.type_1)
 968         {
 969             rr.stream = assoc->encode;
 970             rr.decode = assoc->decode;
 971             rr.print = assoc->print;
 972             rr.request = req;
 973             if ( srw_req->sort.sortKeys )
 974                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 975                                              srw_req->sort.sortKeys );
 976             rr.association = assoc;
 977             rr.fd = 0;
 978             rr.hits = 0;
 979             rr.errcode = 0;
 980             rr.errstring = 0;
 981             rr.search_info = 0;
 982             yaz_log_zquery_level(log_requestdetail,rr.query);
 983
 984             (assoc->init->bend_search)(assoc->backend, &rr);
 985             if (rr.errcode)
 986             {
 987                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 988                 {
 989                     *http_code = 404;
 990                 }
 991                 else
 992                 {
 993                     srw_error = yaz_diag_bib1_to_srw (rr.errcode);
 994                     yaz_add_srw_diagnostic(assoc->encode,
 995                                            &srw_res->diagnostics,
 996                                            &srw_res->num_diagnostics,
 997                                            srw_error, rr.errstring);
 998                 }
 999             }
1000             else
1001             {
1002                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
1003                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
1004
1005                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
1006                         start, number, rr.hits);
1007
1008                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
1009                 if (rr.srw_setname)
1010                 {
1011                     srw_res->resultSetId =
1012                         odr_strdup(assoc->encode, rr.srw_setname );
1013                     srw_res->resultSetIdleTime =
1014                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
1015                 }
1016                 if (number > 0)
1017                 {
1018                     int i;
1019
1020                     if (start > rr.hits)
1021                     {
1022                         yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1023                                                &srw_res->num_diagnostics,
1024                                                YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1025                     }
1026                     else
1027                     {
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     }
1129     if (log_request)
1130     {
1131         const char *querystr = "?";
1132         const char *querytype = "?";
1133         WRBUF wr = wrbuf_alloc();
1134
1135         switch (srw_req->query_type)
1136         {
1137         case Z_SRW_query_type_cql:
1138             querytype = "CQL";
1139             querystr = srw_req->query.cql;
1140             break;
1141         case Z_SRW_query_type_pqf:
1142             querytype = "PQF";
1143             querystr = srw_req->query.pqf;
1144             break;
1145         }
1146         wrbuf_printf(wr, "SRWSearch ");
1147         wrbuf_printf(wr, srw_req->database);
1148         wrbuf_printf(wr, " ");
1149         if (srw_res->num_diagnostics)
1150             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1151         else if (*http_code != 200)
1152             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1153         else if (srw_res->numberOfRecords)
1154         {
1155             wrbuf_printf(wr, "OK %d",
1156                          (srw_res->numberOfRecords ?
1157                           *srw_res->numberOfRecords : 0));
1158         }
1159         wrbuf_printf(wr, " %s %d+%d",
1160                      (srw_res->resultSetId ?
1161                       srw_res->resultSetId : "-"),
1162                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1163                      srw_res->num_records);
1164         yaz_log(log_request, "%s %s: %s", wrbuf_buf(wr), querytype, querystr);
1165         wrbuf_free(wr, 1);
1166     }
1167 }
1168
1169 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1170 {
1171 #if YAZ_HAVE_XML2
1172     xmlNodePtr ptr = rr->server_node_ptr;
1173     if (!ptr)
1174         return 0;
1175     for (ptr = ptr->children; ptr; ptr = ptr->next)
1176     {
1177         if (ptr->type != XML_ELEMENT_NODE)
1178             continue;
1179         if (!strcmp((const char *) ptr->name, "explain"))
1180         {
1181             int len;
1182             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1183             xmlChar *buf_out;
1184             char *content;
1185
1186             ptr = xmlCopyNode(ptr, 1);
1187
1188             xmlDocSetRootElement(doc, ptr);
1189
1190             xmlDocDumpMemory(doc, &buf_out, &len);
1191             content = (char*) odr_malloc(rr->stream, 1+len);
1192             memcpy(content, buf_out, len);
1193             content[len] = '\0';
1194
1195             xmlFree(buf_out);
1196             xmlFreeDoc(doc);
1197             rr->explain_buf = content;
1198             return 0;
1199         }
1200     }
1201 #endif
1202     return 0;
1203 }
1204
1205 static void srw_bend_explain(association *assoc, request *req,
1206                              Z_SRW_PDU *sr,
1207                              Z_SRW_explainResponse *srw_res,
1208                              int *http_code)
1209 {
1210     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1211     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1212     *http_code = 404;
1213     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1214     if (assoc->init)
1215     {
1216         bend_explain_rr rr;
1217
1218         rr.stream = assoc->encode;
1219         rr.decode = assoc->decode;
1220         rr.print = assoc->print;
1221         rr.explain_buf = 0;
1222         rr.database = srw_req->database;
1223         if (assoc->server)
1224             rr.server_node_ptr = assoc->server->server_node_ptr;
1225         else
1226             rr.server_node_ptr = 0;
1227         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1228         if (assoc->init->bend_explain)
1229             (*assoc->init->bend_explain)(assoc->backend, &rr);
1230         else
1231             srw_bend_explain_default(assoc->backend, &rr);
1232
1233         if (rr.explain_buf)
1234         {
1235             int packing = Z_SRW_recordPacking_string;
1236             if (srw_req->recordPacking)
1237             {
1238                 if (!strcmp(srw_req->recordPacking, "xml"))
1239                     packing = Z_SRW_recordPacking_XML;
1240                 else if (!strcmp(srw_req->recordPacking, "url"))
1241                     packing = Z_SRW_recordPacking_URL;
1242             }
1243             srw_res->record.recordSchema = rr.schema;
1244             srw_res->record.recordPacking = packing;
1245             srw_res->record.recordData_buf = rr.explain_buf;
1246             srw_res->record.recordData_len = strlen(rr.explain_buf);
1247             srw_res->record.recordPosition = 0;
1248             *http_code = 200;
1249         }
1250     }
1251 }
1252
1253 static void srw_bend_scan(association *assoc, request *req,
1254                           Z_SRW_PDU *sr,
1255                           Z_SRW_scanResponse *srw_res,
1256                           int *http_code)
1257 {
1258     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1259     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1260
1261     *http_code = 200;
1262     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1263     if (srw_res->num_diagnostics == 0 && assoc->init)
1264     {
1265         struct scan_entry *save_entries;
1266
1267         bend_scan_rr *bsrr = (bend_scan_rr *)
1268             odr_malloc (assoc->encode, sizeof(*bsrr));
1269         bsrr->num_bases = 1;
1270         bsrr->basenames = &srw_req->database;
1271
1272         bsrr->num_entries = srw_req->maximumTerms ?
1273             *srw_req->maximumTerms : 10;
1274         bsrr->term_position = srw_req->responsePosition ?
1275             *srw_req->responsePosition : 1;
1276
1277         bsrr->errcode = 0;
1278         bsrr->errstring = 0;
1279         bsrr->referenceId = 0;
1280         bsrr->stream = assoc->encode;
1281         bsrr->print = assoc->print;
1282         bsrr->step_size = odr_intdup(assoc->decode, 0);
1283         bsrr->entries = 0;
1284
1285         if (bsrr->num_entries > 0)
1286         {
1287             int i;
1288             bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1289                                        bsrr->num_entries);
1290             for (i = 0; i<bsrr->num_entries; i++)
1291             {
1292                 bsrr->entries[i].term = 0;
1293                 bsrr->entries[i].occurrences = 0;
1294                 bsrr->entries[i].errcode = 0;
1295                 bsrr->entries[i].errstring = 0;
1296                 bsrr->entries[i].display_term = 0;
1297             }
1298         }
1299         save_entries = bsrr->entries;  /* save it so we can compare later */
1300
1301         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1302             assoc->init->bend_scan)
1303         {
1304             Odr_oid *scan_attributeSet = 0;
1305             oident *attset;
1306             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1307
1308             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1309                                       &scan_attributeSet,
1310                                       srw_req->scanClause.pqf);
1311             if (scan_attributeSet &&
1312                 (attset = oid_getentbyoid(scan_attributeSet)) &&
1313                 (attset->oclass == CLASS_ATTSET ||
1314                  attset->oclass == CLASS_GENERAL))
1315                 bsrr->attributeset = attset->value;
1316             else
1317                 bsrr->attributeset = VAL_NONE;
1318             yaz_pqf_destroy(pqf_parser);
1319             bsrr->scanClause = 0;
1320             ((int (*)(void *, bend_scan_rr *))
1321              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1322         }
1323         else if (srw_req->query_type == Z_SRW_query_type_cql
1324                  && assoc->init->bend_scan && assoc->server
1325                  && assoc->server->cql_transform)
1326         {
1327             int srw_error;
1328             bsrr->scanClause = 0;
1329             bsrr->attributeset = VAL_NONE;
1330             bsrr->term = odr_malloc(assoc->decode, sizeof(*bsrr->term));
1331             srw_error = cql2pqf_scan(assoc->encode,
1332                                      srw_req->scanClause.cql,
1333                                      assoc->server->cql_transform,
1334                                      bsrr->term);
1335             if (srw_error)
1336                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1337                                        &srw_res->num_diagnostics,
1338                                        srw_error, 0);
1339             else
1340             {
1341                 ((int (*)(void *, bend_scan_rr *))
1342                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1343             }
1344         }
1345         else if (srw_req->query_type == Z_SRW_query_type_cql
1346                  && assoc->init->bend_srw_scan)
1347         {
1348             bsrr->term = 0;
1349             bsrr->attributeset = VAL_NONE;
1350             bsrr->scanClause = srw_req->scanClause.cql;
1351             ((int (*)(void *, bend_scan_rr *))
1352              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1353         }
1354         else
1355         {
1356             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1357                                    &srw_res->num_diagnostics,
1358                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1359         }
1360         if (bsrr->errcode)
1361         {
1362             int srw_error;
1363             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1364             {
1365                 *http_code = 404;
1366                 return;
1367             }
1368             srw_error = yaz_diag_bib1_to_srw (bsrr->errcode);
1369
1370             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1371                                    &srw_res->num_diagnostics,
1372                                    srw_error, bsrr->errstring);
1373         }
1374         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1375         {
1376             int i;
1377             srw_res->terms = (Z_SRW_scanTerm*)
1378                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1379                            bsrr->num_entries);
1380
1381             srw_res->num_terms =  bsrr->num_entries;
1382             for (i = 0; i<bsrr->num_entries; i++)
1383             {
1384                 Z_SRW_scanTerm *t = srw_res->terms + i;
1385                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1386                 t->numberOfRecords =
1387                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1388                 t->displayTerm = 0;
1389                 if (save_entries == bsrr->entries &&
1390                     bsrr->entries[i].display_term)
1391                 {
1392                     /* the entries was _not_ set by the handler. So it's
1393                        safe to test for new member display_term. It is
1394                        NULL'ed by us.
1395                     */
1396                     t->displayTerm = odr_strdup(assoc->encode,
1397                                                 bsrr->entries[i].display_term);
1398                 }
1399                 t->whereInList = 0;
1400             }
1401         }
1402     }
1403     if (log_request)
1404     {
1405         WRBUF wr = wrbuf_alloc();
1406         const char *querytype = 0;
1407         const char *querystr = 0;
1408
1409         switch(srw_req->query_type)
1410         {
1411         case Z_SRW_query_type_pqf:
1412             querytype = "PQF";
1413             querystr = srw_req->scanClause.pqf;
1414             break;
1415         case Z_SRW_query_type_cql:
1416             querytype = "CQL";
1417             querystr = srw_req->scanClause.cql;
1418             break;
1419         default:
1420             querytype = "UNKNOWN";
1421             querystr = "";
1422         }
1423
1424         wrbuf_printf(wr, "SRWScan ");
1425         wrbuf_printf(wr, srw_req->database);
1426         wrbuf_printf(wr, " ");
1427
1428         if (srw_res->num_diagnostics)
1429             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1430         else if (srw_res->num_terms)
1431             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1432         else
1433             wrbuf_printf(wr, "OK - - ");
1434
1435         wrbuf_printf(wr, "%d+%d+0 ",
1436                      (srw_req->responsePosition ?
1437                       *srw_req->responsePosition : 1),
1438                      (srw_req->maximumTerms ?
1439                       *srw_req->maximumTerms : 1));
1440         /* there is no step size in SRU/W ??? */
1441         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1442         yaz_log(log_request, "%s ", wrbuf_buf(wr) );
1443         wrbuf_free(wr, 1);
1444     }
1445
1446 }
1447
1448 static void srw_bend_update(association *assoc, request *req,
1449                             Z_SRW_PDU *sr,
1450                             Z_SRW_updateResponse *srw_res,
1451                             int *http_code)
1452 {
1453     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1454     yaz_log(YLOG_DEBUG, "Got SRW UpdateRequest");
1455     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1456     *http_code = 404;
1457     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1458     if (assoc->init)
1459     {
1460         bend_update_rr rr;
1461
1462         rr.stream = assoc->encode;
1463         rr.print = assoc->print;
1464         rr.num_bases = 1;
1465         rr.basenames = &srw_req->database;
1466         rr.operation = srw_req->operation;
1467         rr.operation_status = "failed";
1468         rr.record_id = 0;
1469         rr.record_version = 0;
1470         rr.record_checksum = 0;
1471         rr.record_old_version = 0;
1472         rr.record_packing = "xml";
1473         rr.record_schema = 0;
1474         rr.record_data = 0;
1475         rr.request_extra_record = 0;
1476         rr.response_extra_record = 0;
1477         rr.extra_request_data = 0;
1478         rr.extra_response_data = 0;
1479         rr.uri = 0;
1480         rr.message = 0;
1481         rr.details = 0;
1482
1483         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1484         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1485         if ( !strcmp( rr.operation, "delete" ) ){
1486             if ( !srw_req->recordId ){
1487                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1488                                        &srw_res->num_diagnostics,
1489                                        7, "recordId" );
1490             }
1491             else {
1492                 rr.record_id = srw_req->recordId;
1493             }
1494             if (  !srw_req->recordVersion ){
1495                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1496                                        &srw_res->num_diagnostics,
1497                                        7, "recordVersion" );
1498             }
1499             else {
1500                 rr.record_version = odr_strdup( assoc->encode,
1501                                                 srw_req->recordVersion );
1502
1503             }
1504             if ( srw_req->recordOldVersion ){
1505                 rr.record_old_version = odr_strdup(assoc->encode,
1506                                                    srw_req->recordOldVersion );
1507             }
1508             if ( srw_req->extraRequestData ){
1509                 rr.extra_request_data = odr_strdup(assoc->encode,
1510                                                    srw_req->extraRequestData );
1511             }
1512         }
1513         else if ( !strcmp( rr.operation, "replace" ) ){
1514             if ( !srw_req->recordId ){
1515                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1516                                        &srw_res->num_diagnostics,
1517                                        7, "recordId" );
1518             }
1519             else {
1520                 rr.record_id = srw_req->recordId;
1521             }
1522             if ( srw_req->record.recordSchema == 0 ){
1523                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1524                                        &srw_res->num_diagnostics,
1525                                        7, "recordSchema" );
1526             }
1527             else {
1528                 rr.record_schema = odr_strdup(assoc->encode,
1529                                               srw_req->record.recordSchema );
1530             }
1531             switch (srw_req->record.recordPacking)
1532             {
1533             case Z_SRW_recordPacking_string:
1534                 rr.record_packing = "string";
1535                 break;
1536             case Z_SRW_recordPacking_XML:
1537                 rr.record_packing = "xml";
1538                 break;
1539             case Z_SRW_recordPacking_URL:
1540                 rr.record_packing = "url";
1541                 break;
1542             }
1543             if ( srw_req->record.recordData_len ){
1544                 rr.record_data = odr_strdupn(assoc->encode,
1545                                              srw_req->record.recordData_buf,
1546                                              srw_req->record.recordData_len );
1547                 rr.request_extra_record = srw_req->extra_record;
1548             }
1549             else {
1550                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1551                                        &srw_res->num_diagnostics,
1552                                        7, "recordData" );
1553             }
1554             if (srw_req->extraRequestData)
1555                 rr.extra_request_data = odr_strdup(assoc->encode,
1556                                                    srw_req->extraRequestData );
1557         }
1558         else if ( !strcmp( rr.operation, "insert" ) )
1559         {
1560             rr.record_id = srw_req->recordId;
1561             if ( srw_req->record.recordSchema == 0 ){
1562                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1563                                        &srw_res->num_diagnostics,
1564                                        7, "recordSchema" );
1565             }
1566             else {
1567                 rr.record_schema = odr_strdup(assoc->encode,
1568                                               srw_req->record.recordSchema);
1569             }
1570             switch (srw_req->record.recordPacking)
1571             {
1572             case Z_SRW_recordPacking_string:
1573                 rr.record_packing = "string";
1574                 break;
1575             case Z_SRW_recordPacking_XML:
1576                 rr.record_packing = "xml";
1577                 break;
1578             case Z_SRW_recordPacking_URL:
1579                 rr.record_packing = "url";
1580                 break;
1581             }
1582
1583             if (srw_req->record.recordData_len)
1584             {
1585                 rr.record_data = odr_strdupn(assoc->encode,
1586                                              srw_req->record.recordData_buf,
1587                                              srw_req->record.recordData_len );
1588                 rr.request_extra_record = srw_req->extra_record;
1589             }
1590             else
1591                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1592                                        &srw_res->num_diagnostics,
1593                                        7, "recordData" );
1594             if ( srw_req->extraRequestData )
1595                 rr.extra_request_data = odr_strdup(assoc->encode,
1596                                                    srw_req->extraRequestData );
1597         }
1598         if (srw_res->num_diagnostics == 0)
1599         {
1600             if ( assoc->init->bend_srw_update)
1601                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1602             else {
1603                 yaz_log( YLOG_WARN, "Got No Update function!");
1604                 return;
1605             }
1606         }
1607
1608         if (rr.uri)
1609             yaz_add_srw_diagnostic_uri(assoc->encode,
1610                                        &srw_res->diagnostics,
1611                                        &srw_res->num_diagnostics,
1612                                        rr.uri,
1613                                        rr.message,
1614                                        rr.details);
1615         srw_res->recordId = rr.record_id;
1616         srw_res->operationStatus = rr.operation_status;
1617         srw_res->recordVersion = rr.record_version;
1618         srw_res->recordChecksum = rr.record_checksum;
1619         srw_res->extraResponseData = rr.extra_response_data;
1620         srw_res->record.recordPosition = 0;
1621         if (srw_res->num_diagnostics == 0 && rr.record_data)
1622         {
1623             srw_res->record.recordSchema = rr.record_schema;
1624             srw_res->record.recordPacking = srw_req->record.recordPacking;
1625             srw_res->record.recordData_buf = rr.record_data;
1626             srw_res->record.recordData_len = strlen(rr.record_data);
1627             srw_res->extra_record = rr.response_extra_record;
1628
1629         }
1630         else
1631             srw_res->record.recordData_len = 0;
1632         *http_code = 200;
1633     }
1634 }
1635
1636 /* check if path is OK (1); BAD (0) */
1637 static int check_path(const char *path)
1638 {
1639     if (*path != '/')
1640         return 0;
1641     if (strstr(path, ".."))
1642         return 0;
1643     return 1;
1644 }
1645
1646 static char *read_file(const char *fname, ODR o, int *sz)
1647 {
1648     char *buf;
1649     FILE *inf = fopen(fname, "rb");
1650     if (!inf)
1651         return 0;
1652
1653     fseek(inf, 0L, SEEK_END);
1654     *sz = ftell(inf);
1655     rewind(inf);
1656     buf = odr_malloc(o, *sz);
1657     fread(buf, 1, *sz, inf);
1658     fclose(inf);
1659     return buf;
1660 }
1661
1662 static void process_http_request(association *assoc, request *req)
1663 {
1664     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1665     ODR o = assoc->encode;
1666     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1667     Z_SRW_PDU *sr = 0;
1668     Z_SOAP *soap_package = 0;
1669     Z_GDU *p = 0;
1670     char *charset = 0;
1671     Z_HTTP_Response *hres = 0;
1672     int keepalive = 1;
1673     const char *stylesheet = 0; /* for now .. set later */
1674     Z_SRW_diagnostic *diagnostic = 0;
1675     int num_diagnostic = 0;
1676     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1677
1678     if (!control_association(assoc, host, 0))
1679     {
1680         p = z_get_HTTP_Response(o, 404);
1681         r = 1;
1682     }
1683     if (r == 2 && assoc->server && assoc->server->docpath
1684         && hreq->path[0] == '/'
1685         &&
1686         /* check if path is a proper prefix of documentroot */
1687         strncmp(hreq->path+1, assoc->server->docpath,
1688                 strlen(assoc->server->docpath))
1689         == 0)
1690     {
1691         if (!check_path(hreq->path))
1692         {
1693             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1694             p = z_get_HTTP_Response(o, 404);
1695         }
1696         else
1697         {
1698             int content_size = 0;
1699             char *content_buf = read_file(hreq->path+1, o, &content_size);
1700             if (!content_buf)
1701             {
1702                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1703                 p = z_get_HTTP_Response(o, 404);
1704             }
1705             else
1706             {
1707                 const char *ctype = 0;
1708                 yaz_mime_types types = yaz_mime_types_create();
1709
1710                 yaz_mime_types_add(types, "xsl", "application/xml");
1711                 yaz_mime_types_add(types, "xml", "application/xml");
1712                 yaz_mime_types_add(types, "css", "text/css");
1713                 yaz_mime_types_add(types, "html", "text/html");
1714                 yaz_mime_types_add(types, "htm", "text/html");
1715                 yaz_mime_types_add(types, "txt", "text/plain");
1716                 yaz_mime_types_add(types, "js", "application/x-javascript");
1717
1718                 yaz_mime_types_add(types, "gif", "image/gif");
1719                 yaz_mime_types_add(types, "png", "image/png");
1720                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1721                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1722
1723                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1724                 if (!ctype)
1725                 {
1726                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1727                     p = z_get_HTTP_Response(o, 404);
1728                 }
1729                 else
1730                 {
1731                     p = z_get_HTTP_Response(o, 200);
1732                     hres = p->u.HTTP_Response;
1733                     hres->content_buf = content_buf;
1734                     hres->content_len = content_size;
1735                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1736                 }
1737                 yaz_mime_types_destroy(types);
1738             }
1739         }
1740         r = 1;
1741     }
1742
1743     if (r == 2)
1744     {
1745         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1746         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1747     }
1748     if (r == 2)  /* not taken */
1749     {
1750         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1751                            &diagnostic, &num_diagnostic);
1752         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1753     }
1754     if (r == 0)  /* decode SRW/SRU OK .. */
1755     {
1756         int http_code = 200;
1757         if (sr->which == Z_SRW_searchRetrieve_request)
1758         {
1759             Z_SRW_PDU *res =
1760                 yaz_srw_get(assoc->encode, Z_SRW_searchRetrieve_response);
1761
1762             stylesheet = sr->u.request->stylesheet;
1763             if (num_diagnostic)
1764             {
1765                 res->u.response->diagnostics = diagnostic;
1766                 res->u.response->num_diagnostics = num_diagnostic;
1767             }
1768             else
1769             {
1770                 srw_bend_search(assoc, req, sr, res->u.response,
1771                                 &http_code);
1772             }
1773             if (http_code == 200)
1774                 soap_package->u.generic->p = res;
1775         }
1776         else if (sr->which == Z_SRW_explain_request)
1777         {
1778             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
1779             stylesheet = sr->u.explain_request->stylesheet;
1780             if (num_diagnostic)
1781             {
1782                 res->u.explain_response->diagnostics = diagnostic;
1783                 res->u.explain_response->num_diagnostics = num_diagnostic;
1784             }
1785             srw_bend_explain(assoc, req, sr,
1786                              res->u.explain_response, &http_code);
1787             if (http_code == 200)
1788                 soap_package->u.generic->p = res;
1789         }
1790         else if (sr->which == Z_SRW_scan_request)
1791         {
1792             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_scan_response);
1793             stylesheet = sr->u.scan_request->stylesheet;
1794             if (num_diagnostic)
1795             {
1796                 res->u.scan_response->diagnostics = diagnostic;
1797                 res->u.scan_response->num_diagnostics = num_diagnostic;
1798             }
1799             srw_bend_scan(assoc, req, sr,
1800                           res->u.scan_response, &http_code);
1801             if (http_code == 200)
1802                 soap_package->u.generic->p = res;
1803         }
1804         else if (sr->which == Z_SRW_update_request)
1805         {
1806             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_update_response);
1807             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1808             if (num_diagnostic)
1809             {
1810                 res->u.update_response->diagnostics = diagnostic;
1811                 res->u.update_response->num_diagnostics = num_diagnostic;
1812             }
1813             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1814             srw_bend_update(assoc, req, sr,
1815                             res->u.update_response, &http_code);
1816             if (http_code == 200)
1817                 soap_package->u.generic->p = res;
1818         }
1819         else
1820         {
1821             yaz_log(log_request, "SOAP ERROR");
1822             /* FIXME - what error, what query */
1823             http_code = 500;
1824             z_soap_error(assoc->encode, soap_package,
1825                          "SOAP-ENV:Client", "Bad method", 0);
1826         }
1827         if (http_code == 200 || http_code == 500)
1828         {
1829             static Z_SOAP_Handler soap_handlers[4] = {
1830 #if YAZ_HAVE_XML2
1831                 {"http://www.loc.gov/zing/srw/", 0,
1832                  (Z_SOAP_fun) yaz_srw_codec},
1833                 {"http://www.loc.gov/zing/srw/v1.0/", 0,
1834                  (Z_SOAP_fun) yaz_srw_codec},
1835                 {"http://www.loc.gov/zing/srw/update/", 0,
1836                  (Z_SOAP_fun) yaz_ucp_codec},
1837 #endif
1838                 {0, 0, 0}
1839             };
1840             char ctype[60];
1841             int ret;
1842             p = z_get_HTTP_Response(o, 200);
1843             hres = p->u.HTTP_Response;
1844
1845             if (!stylesheet && assoc->server)
1846                 stylesheet = assoc->server->stylesheet;
1847
1848             /* empty stylesheet means NO stylesheet */
1849             if (stylesheet && *stylesheet == '\0')
1850                 stylesheet = 0;
1851
1852             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1853                                        &hres->content_buf, &hres->content_len,
1854                                        soap_handlers, charset, stylesheet);
1855             hres->code = http_code;
1856
1857             strcpy(ctype, "text/xml");
1858             if (charset)
1859             {
1860                 strcat(ctype, "; charset=");
1861                 strcat(ctype, charset);
1862             }
1863             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1864         }
1865         else
1866             p = z_get_HTTP_Response(o, http_code);
1867     }
1868
1869     if (p == 0)
1870         p = z_get_HTTP_Response(o, 500);
1871     hres = p->u.HTTP_Response;
1872     if (!strcmp(hreq->version, "1.0"))
1873     {
1874         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1875         if (v && !strcmp(v, "Keep-Alive"))
1876             keepalive = 1;
1877         else
1878             keepalive = 0;
1879         hres->version = "1.0";
1880     }
1881     else
1882     {
1883         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1884         if (v && !strcmp(v, "close"))
1885             keepalive = 0;
1886         else
1887             keepalive = 1;
1888         hres->version = "1.1";
1889     }
1890     if (!keepalive)
1891     {
1892         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1893         assoc->state = ASSOC_DEAD;
1894         assoc->cs_get_mask = 0;
1895     }
1896     else
1897     {
1898         int t;
1899         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1900
1901         if (alive && isdigit(*(const unsigned char *) alive))
1902             t = atoi(alive);
1903         else
1904             t = 15;
1905         if (t < 0 || t > 3600)
1906             t = 3600;
1907         iochan_settimeout(assoc->client_chan,t);
1908         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1909     }
1910     process_gdu_response(assoc, req, p);
1911 }
1912
1913 static void process_gdu_request(association *assoc, request *req)
1914 {
1915     if (req->gdu_request->which == Z_GDU_Z3950)
1916     {
1917         char *msg = 0;
1918         req->apdu_request = req->gdu_request->u.z3950;
1919         if (process_z_request(assoc, req, &msg) < 0)
1920             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1921     }
1922     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1923         process_http_request(assoc, req);
1924     else
1925     {
1926         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1927     }
1928 }
1929
1930 /*
1931  * Initiate request processing.
1932  */
1933 static int process_z_request(association *assoc, request *req, char **msg)
1934 {
1935     int fd = -1;
1936     Z_APDU *res;
1937     int retval;
1938
1939     *msg = "Unknown Error";
1940     assert(req && req->state == REQUEST_IDLE);
1941     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1942     {
1943         *msg = "Missing InitRequest";
1944         return -1;
1945     }
1946     switch (req->apdu_request->which)
1947     {
1948     case Z_APDU_initRequest:
1949         res = process_initRequest(assoc, req); break;
1950     case Z_APDU_searchRequest:
1951         res = process_searchRequest(assoc, req, &fd); break;
1952     case Z_APDU_presentRequest:
1953         res = process_presentRequest(assoc, req, &fd); break;
1954     case Z_APDU_scanRequest:
1955         if (assoc->init->bend_scan)
1956             res = process_scanRequest(assoc, req, &fd);
1957         else
1958         {
1959             *msg = "Cannot handle Scan APDU";
1960             return -1;
1961         }
1962         break;
1963     case Z_APDU_extendedServicesRequest:
1964         if (assoc->init->bend_esrequest)
1965             res = process_ESRequest(assoc, req, &fd);
1966         else
1967         {
1968             *msg = "Cannot handle Extended Services APDU";
1969             return -1;
1970         }
1971         break;
1972     case Z_APDU_sortRequest:
1973         if (assoc->init->bend_sort)
1974             res = process_sortRequest(assoc, req, &fd);
1975         else
1976         {
1977             *msg = "Cannot handle Sort APDU";
1978             return -1;
1979         }
1980         break;
1981     case Z_APDU_close:
1982         process_close(assoc, req);
1983         return 0;
1984     case Z_APDU_deleteResultSetRequest:
1985         if (assoc->init->bend_delete)
1986             res = process_deleteRequest(assoc, req, &fd);
1987         else
1988         {
1989             *msg = "Cannot handle Delete APDU";
1990             return -1;
1991         }
1992         break;
1993     case Z_APDU_segmentRequest:
1994         if (assoc->init->bend_segment)
1995         {
1996             res = process_segmentRequest (assoc, req);
1997         }
1998         else
1999         {
2000             *msg = "Cannot handle Segment APDU";
2001             return -1;
2002         }
2003         break;
2004     case Z_APDU_triggerResourceControlRequest:
2005         return 0;
2006     default:
2007         *msg = "Bad APDU received";
2008         return -1;
2009     }
2010     if (res)
2011     {
2012         yaz_log(YLOG_DEBUG, "  result immediately available");
2013         retval = process_z_response(assoc, req, res);
2014     }
2015     else if (fd < 0)
2016     {
2017         yaz_log(YLOG_DEBUG, "  result unavailble");
2018         retval = 0;
2019     }
2020     else /* no result yet - one will be provided later */
2021     {
2022         IOCHAN chan;
2023
2024         /* Set up an I/O handler for the fd supplied by the backend */
2025
2026         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2027         req->state = REQUEST_PENDING;
2028         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2029             abort();
2030         iochan_setdata(chan, assoc);
2031         retval = 0;
2032     }
2033     return retval;
2034 }
2035
2036 /*
2037  * Handle message from the backend.
2038  */
2039 void backend_response(IOCHAN i, int event)
2040 {
2041     association *assoc = (association *)iochan_getdata(i);
2042     request *req = request_head(&assoc->incoming);
2043     Z_APDU *res;
2044     int fd;
2045
2046     yaz_log(YLOG_DEBUG, "backend_response");
2047     assert(assoc && req && req->state != REQUEST_IDLE);
2048     /* determine what it is we're waiting for */
2049     switch (req->apdu_request->which)
2050     {
2051         case Z_APDU_searchRequest:
2052             res = response_searchRequest(assoc, req, 0, &fd); break;
2053 #if 0
2054         case Z_APDU_presentRequest:
2055             res = response_presentRequest(assoc, req, 0, &fd); break;
2056         case Z_APDU_scanRequest:
2057             res = response_scanRequest(assoc, req, 0, &fd); break;
2058 #endif
2059         default:
2060             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2061             abort();
2062     }
2063     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2064     {
2065         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2066         do_close(assoc, Z_Close_systemProblem, 0);
2067         iochan_destroy(i);
2068         return;
2069     }
2070     else if (!res) /* no result yet - try again later */
2071     {
2072         yaz_log(YLOG_DEBUG, "   no result yet");
2073         iochan_setfd(i, fd); /* in case fd has changed */
2074     }
2075 }
2076
2077 /*
2078  * Encode response, and transfer the request structure to the outgoing queue.
2079  */
2080 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2081 {
2082     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2083
2084     if (assoc->print)
2085     {
2086         if (!z_GDU(assoc->print, &res, 0, 0))
2087             yaz_log(YLOG_WARN, "ODR print error: %s",
2088                 odr_errmsg(odr_geterror(assoc->print)));
2089         odr_reset(assoc->print);
2090     }
2091     if (!z_GDU(assoc->encode, &res, 0, 0))
2092     {
2093         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2094                 odr_errmsg(odr_geterror(assoc->decode)),
2095                 odr_getelement(assoc->decode));
2096         return -1;
2097     }
2098     req->response = odr_getbuf(assoc->encode, &req->len_response,
2099         &req->size_response);
2100     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2101     odr_reset(assoc->encode);
2102     req->state = REQUEST_IDLE;
2103     request_enq(&assoc->outgoing, req);
2104     /* turn the work over to the ir_session handler */
2105     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2106     assoc->cs_put_mask = EVENT_OUTPUT;
2107     /* Is there more work to be done? give that to the input handler too */
2108 #if 1
2109     if (request_head(&assoc->incoming))
2110     {
2111         yaz_log (YLOG_DEBUG, "more work to be done");
2112         iochan_setevent(assoc->client_chan, EVENT_WORK);
2113     }
2114 #endif
2115     return 0;
2116 }
2117
2118 /*
2119  * Encode response, and transfer the request structure to the outgoing queue.
2120  */
2121 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2122 {
2123     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2124     gres->which = Z_GDU_Z3950;
2125     gres->u.z3950 = res;
2126
2127     return process_gdu_response(assoc, req, gres);
2128 }
2129
2130 static char *get_vhost(Z_OtherInformation *otherInfo)
2131 {
2132     return yaz_oi_get_string_oidval(&otherInfo, VAL_PROXY, 1, 0);
2133 }
2134
2135 /*
2136  * Handle init request.
2137  * At the moment, we don't check the options
2138  * anywhere else in the code - we just try not to do anything that would
2139  * break a naive client. We'll toss 'em into the association block when
2140  * we need them there.
2141  */
2142 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2143 {
2144     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2145     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2146     Z_InitResponse *resp = apdu->u.initResponse;
2147     bend_initresult *binitres;
2148     char *version;
2149     char options[140];
2150     statserv_options_block *cb = 0;  /* by default no control for backend */
2151
2152     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2153         cb = statserv_getcontrol();  /* got control block for backend */
2154
2155     if (cb && assoc->backend)
2156         (*cb->bend_close)(assoc->backend);
2157
2158     yaz_log(log_requestdetail, "Got initRequest");
2159     if (req->implementationId)
2160         yaz_log(log_requestdetail, "Id:        %s",
2161                 req->implementationId);
2162     if (req->implementationName)
2163         yaz_log(log_requestdetail, "Name:      %s",
2164                 req->implementationName);
2165     if (req->implementationVersion)
2166         yaz_log(log_requestdetail, "Version:   %s",
2167                 req->implementationVersion);
2168
2169     assoc_init_reset(assoc);
2170
2171     assoc->init->auth = req->idAuthentication;
2172     assoc->init->referenceId = req->referenceId;
2173
2174     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2175     {
2176         Z_CharSetandLanguageNegotiation *negotiation =
2177             yaz_get_charneg_record (req->otherInfo);
2178         if (negotiation &&
2179             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2180             assoc->init->charneg_request = negotiation;
2181     }
2182
2183     assoc->backend = 0;
2184     if (cb)
2185     {
2186         if (req->implementationVersion)
2187             yaz_log(log_requestdetail, "Config:    %s",
2188                     cb->configname);
2189
2190         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2191
2192         /* we have a backend control block, so call that init function */
2193         if (!(binitres = (*cb->bend_init)(assoc->init)))
2194         {
2195             yaz_log(YLOG_WARN, "Bad response from backend.");
2196             return 0;
2197         }
2198         assoc->backend = binitres->handle;
2199     }
2200     else
2201     {
2202         /* no backend. return error */
2203         binitres = odr_malloc(assoc->encode, sizeof(*binitres));
2204         binitres->errstring = 0;
2205         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2206         iochan_settimeout(assoc->client_chan, 10);
2207     }
2208     if ((assoc->init->bend_sort))
2209         yaz_log (YLOG_DEBUG, "Sort handler installed");
2210     if ((assoc->init->bend_search))
2211         yaz_log (YLOG_DEBUG, "Search handler installed");
2212     if ((assoc->init->bend_present))
2213         yaz_log (YLOG_DEBUG, "Present handler installed");
2214     if ((assoc->init->bend_esrequest))
2215         yaz_log (YLOG_DEBUG, "ESRequest handler installed");
2216     if ((assoc->init->bend_delete))
2217         yaz_log (YLOG_DEBUG, "Delete handler installed");
2218     if ((assoc->init->bend_scan))
2219         yaz_log (YLOG_DEBUG, "Scan handler installed");
2220     if ((assoc->init->bend_segment))
2221         yaz_log (YLOG_DEBUG, "Segment handler installed");
2222
2223     resp->referenceId = req->referenceId;
2224     *options = '\0';
2225     /* let's tell the client what we can do */
2226     if (ODR_MASK_GET(req->options, Z_Options_search))
2227     {
2228         ODR_MASK_SET(resp->options, Z_Options_search);
2229         strcat(options, "srch");
2230     }
2231     if (ODR_MASK_GET(req->options, Z_Options_present))
2232     {
2233         ODR_MASK_SET(resp->options, Z_Options_present);
2234         strcat(options, " prst");
2235     }
2236     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2237         assoc->init->bend_delete)
2238     {
2239         ODR_MASK_SET(resp->options, Z_Options_delSet);
2240         strcat(options, " del");
2241     }
2242     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2243         assoc->init->bend_esrequest)
2244     {
2245         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2246         strcat (options, " extendedServices");
2247     }
2248     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2249     {
2250         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2251         strcat(options, " namedresults");
2252     }
2253     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2254     {
2255         ODR_MASK_SET(resp->options, Z_Options_scan);
2256         strcat(options, " scan");
2257     }
2258     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2259     {
2260         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2261         strcat(options, " concurrop");
2262     }
2263     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2264     {
2265         ODR_MASK_SET(resp->options, Z_Options_sort);
2266         strcat(options, " sort");
2267     }
2268
2269     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
2270         && assoc->init->charneg_response)
2271     {
2272         Z_OtherInformation **p;
2273         Z_OtherInformationUnit *p0;
2274
2275         yaz_oi_APDU(apdu, &p);
2276
2277         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
2278             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2279
2280             p0->which = Z_OtherInfo_externallyDefinedInfo;
2281             p0->information.externallyDefinedInfo =
2282                 assoc->init->charneg_response;
2283         }
2284         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2285         strcat(options, " negotiation");
2286     }
2287
2288     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2289         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2290
2291     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2292     {
2293         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2294         assoc->version = 1; /* 1 & 2 are equivalent */
2295     }
2296     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2297     {
2298         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2299         assoc->version = 2;
2300     }
2301     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2302     {
2303         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2304         assoc->version = 3;
2305     }
2306
2307     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2308
2309     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2310         assoc->maximumRecordSize = *req->maximumRecordSize;
2311
2312     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2313         assoc->preferredMessageSize = *req->preferredMessageSize;
2314
2315     resp->preferredMessageSize = &assoc->preferredMessageSize;
2316     resp->maximumRecordSize = &assoc->maximumRecordSize;
2317
2318     resp->implementationId = odr_prepend(assoc->encode,
2319                 assoc->init->implementation_id,
2320                 resp->implementationId);
2321
2322     resp->implementationName = odr_prepend(assoc->encode,
2323                 assoc->init->implementation_name,
2324                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2325
2326     version = odr_strdup(assoc->encode, "$Revision: 1.98 $");
2327     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2328         version[strlen(version)-2] = '\0';
2329     resp->implementationVersion = odr_prepend(assoc->encode,
2330                 assoc->init->implementation_version,
2331                 odr_prepend(assoc->encode, &version[11],
2332                             resp->implementationVersion));
2333
2334     if (binitres->errcode)
2335     {
2336         assoc->state = ASSOC_DEAD;
2337         resp->userInformationField =
2338             init_diagnostics(assoc->encode, binitres->errcode,
2339                              binitres->errstring);
2340         *resp->result = 0;
2341     }
2342     if (log_request)
2343     {
2344         if (!req->idAuthentication)
2345             yaz_log(log_request, "Auth none");
2346         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2347         {
2348             const char *open = req->idAuthentication->u.open;
2349             const char *slash = strchr(open, '/');
2350             int len;
2351             if (slash)
2352                 len = slash - open;
2353             else
2354                 len = strlen(open);
2355                 yaz_log(log_request, "Auth open %.*s", len, open);
2356         }
2357         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2358         {
2359             const char *user = req->idAuthentication->u.idPass->userId;
2360             const char *group = req->idAuthentication->u.idPass->groupId;
2361             yaz_log(log_request, "Auth idPass %s %s",
2362                     user ? user : "-", group ? group : "-");
2363         }
2364         else if (req->idAuthentication->which
2365                  == Z_IdAuthentication_anonymous)
2366         {
2367             yaz_log(log_request, "Auth anonymous");
2368         }
2369         else
2370         {
2371             yaz_log(log_request, "Auth other");
2372         }
2373     }
2374     if (log_request)
2375     {
2376         WRBUF wr = wrbuf_alloc();
2377         wrbuf_printf(wr, "Init ");
2378         if (binitres->errcode)
2379             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2380         else
2381             wrbuf_printf(wr, "OK -");
2382         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2383                      (req->implementationId ? req->implementationId :"-"),
2384                      (req->implementationName ?
2385                       req->implementationName : "-"),
2386                      (req->implementationVersion ?
2387                       req->implementationVersion : "-")
2388             );
2389         yaz_log(log_request, "%s", wrbuf_buf(wr));
2390         wrbuf_free(wr, 1);
2391     }
2392     return apdu;
2393 }
2394
2395 /*
2396  * Set the specified `errcode' and `errstring' into a UserInfo-1
2397  * external to be returned to the client in accordance with Z35.90
2398  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2399  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2400  */
2401 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2402 {
2403     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2404         addinfo ? " -- " : "", addinfo ? addinfo : "");
2405     return zget_init_diagnostics(odr, error, addinfo);
2406 }
2407
2408 /*
2409  * nonsurrogate diagnostic record.
2410  */
2411 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2412 {
2413     Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec));
2414
2415     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2416             addinfo ? " -- " : "", addinfo ? addinfo : "");
2417
2418     rec->which = Z_Records_NSD;
2419     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2420                                                            error, addinfo);
2421     return rec;
2422 }
2423
2424 /*
2425  * surrogate diagnostic.
2426  */
2427 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2428                                           const char *dbname,
2429                                           int error, const char *addinfo)
2430 {
2431     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2432             addinfo ? " -- " : "", addinfo ? addinfo : "");
2433     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2434 }
2435
2436 static Z_Records *pack_records(association *a, char *setname, int start,
2437                                int *num, Z_RecordComposition *comp,
2438                                int *next, int *pres, oid_value format,
2439                                Z_ReferenceId *referenceId,
2440                                int *oid, int *errcode)
2441 {
2442     int recno, total_length = 0, toget = *num, dumped_records = 0;
2443     Z_Records *records =
2444         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
2445     Z_NamePlusRecordList *reclist =
2446         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
2447     Z_NamePlusRecord **list =
2448         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
2449
2450     records->which = Z_Records_DBOSD;
2451     records->u.databaseOrSurDiagnostics = reclist;
2452     reclist->num_records = 0;
2453     reclist->records = list;
2454     *pres = Z_PresentStatus_success;
2455     *num = 0;
2456     *next = 0;
2457
2458     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2459     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2460         a->maximumRecordSize);
2461     for (recno = start; reclist->num_records < toget; recno++)
2462     {
2463         bend_fetch_rr freq;
2464         Z_NamePlusRecord *thisrec;
2465         int this_length = 0;
2466         /*
2467          * we get the number of bytes allocated on the stream before any
2468          * allocation done by the backend - this should give us a reasonable
2469          * idea of the total size of the data so far.
2470          */
2471         total_length = odr_total(a->encode) - dumped_records;
2472         freq.errcode = 0;
2473         freq.errstring = 0;
2474         freq.basename = 0;
2475         freq.len = 0;
2476         freq.record = 0;
2477         freq.last_in_set = 0;
2478         freq.setname = setname;
2479         freq.surrogate_flag = 0;
2480         freq.number = recno;
2481         freq.comp = comp;
2482         freq.request_format = format;
2483         freq.request_format_raw = oid;
2484         freq.output_format = format;
2485         freq.output_format_raw = 0;
2486         freq.stream = a->encode;
2487         freq.print = a->print;
2488         freq.referenceId = referenceId;
2489         freq.schema = 0;
2490
2491         retrieve_fetch(a, &freq);
2492
2493         *next = freq.last_in_set ? 0 : recno + 1;
2494
2495         /* backend should be able to signal whether error is system-wide
2496            or only pertaining to current record */
2497         if (freq.errcode)
2498         {
2499             if (!freq.surrogate_flag)
2500             {
2501                 char s[20];
2502                 *pres = Z_PresentStatus_failure;
2503                 /* for 'present request out of range',
2504                    set addinfo to record position if not set */
2505                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2506                                 freq.errstring == 0)
2507                 {
2508                     sprintf (s, "%d", recno);
2509                     freq.errstring = s;
2510                 }
2511                 if (errcode)
2512                     *errcode = freq.errcode;
2513                 return diagrec(a, freq.errcode, freq.errstring);
2514             }
2515             reclist->records[reclist->num_records] =
2516                 surrogatediagrec(a, freq.basename, freq.errcode,
2517                                  freq.errstring);
2518             reclist->num_records++;
2519             continue;
2520         }
2521         if (freq.record == 0)  /* no error and no record ? */
2522         {
2523             *next = 0;   /* signal end-of-set and stop */
2524             break;
2525         }
2526         if (freq.len >= 0)
2527             this_length = freq.len;
2528         else
2529             this_length = odr_total(a->encode) - total_length - dumped_records;
2530         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2531             this_length, total_length, dumped_records);
2532         if (a->preferredMessageSize > 0 &&
2533                 this_length + total_length > a->preferredMessageSize)
2534         {
2535             /* record is small enough, really */
2536             if (this_length <= a->preferredMessageSize && recno > start)
2537             {
2538                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2539                 *pres = Z_PresentStatus_partial_2;
2540                 break;
2541             }
2542             /* record can only be fetched by itself */
2543             if (this_length < a->maximumRecordSize)
2544             {
2545                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2546                 if (toget > 1)
2547                 {
2548                     yaz_log(YLOG_DEBUG, "  Dropped it");
2549                     reclist->records[reclist->num_records] =
2550                          surrogatediagrec(a, freq.basename, 16, 0);
2551                     reclist->num_records++;
2552                     dumped_records += this_length;
2553                     continue;
2554                 }
2555             }
2556             else /* too big entirely */
2557             {
2558                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2559                         this_length, a->maximumRecordSize);
2560                 reclist->records[reclist->num_records] =
2561                     surrogatediagrec(a, freq.basename, 17, 0);
2562                 reclist->num_records++;
2563                 dumped_records += this_length;
2564                 continue;
2565             }
2566         }
2567
2568         if (!(thisrec = (Z_NamePlusRecord *)
2569               odr_malloc(a->encode, sizeof(*thisrec))))
2570             return 0;
2571         if (freq.basename)
2572             thisrec->databaseName = odr_strdup(a->encode, freq.basename);
2573         else
2574             thisrec->databaseName = 0;
2575         thisrec->which = Z_NamePlusRecord_databaseRecord;
2576
2577         if (freq.output_format_raw)
2578         {
2579             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
2580             freq.output_format = ident->value;
2581         }
2582         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
2583                                                  freq.record, freq.len);
2584         if (!thisrec->u.databaseRecord)
2585             return 0;
2586         reclist->records[reclist->num_records] = thisrec;
2587         reclist->num_records++;
2588     }
2589     *num = reclist->num_records;
2590     return records;
2591 }
2592
2593 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2594     int *fd)
2595 {
2596     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2597     bend_search_rr *bsrr =
2598         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
2599
2600     yaz_log(log_requestdetail, "Got SearchRequest.");
2601     bsrr->fd = fd;
2602     bsrr->request = reqb;
2603     bsrr->association = assoc;
2604     bsrr->referenceId = req->referenceId;
2605     save_referenceId (reqb, bsrr->referenceId);
2606     bsrr->srw_sortKeys = 0;
2607     bsrr->srw_setname = 0;
2608     bsrr->srw_setnameIdleTime = 0;
2609
2610     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2611     if (req->databaseNames)
2612     {
2613         int i;
2614         for (i = 0; i < req->num_databaseNames; i++)
2615             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2616     }
2617
2618     yaz_log_zquery_level(log_requestdetail,req->query);
2619
2620     if (assoc->init->bend_search)
2621     {
2622         bsrr->setname = req->resultSetName;
2623         bsrr->replace_set = *req->replaceIndicator;
2624         bsrr->num_bases = req->num_databaseNames;
2625         bsrr->basenames = req->databaseNames;
2626         bsrr->query = req->query;
2627         bsrr->stream = assoc->encode;
2628         nmem_transfer(bsrr->stream->mem, reqb->request_mem);
2629         bsrr->decode = assoc->decode;
2630         bsrr->print = assoc->print;
2631         bsrr->hits = 0;
2632         bsrr->errcode = 0;
2633         bsrr->errstring = NULL;
2634         bsrr->search_info = NULL;
2635
2636         if (assoc->server && assoc->server->cql_transform
2637             && req->query->which == Z_Query_type_104
2638             && req->query->u.type_104->which == Z_External_CQL)
2639         {
2640             /* have a CQL query and a CQL to PQF transform .. */
2641             int srw_errcode =
2642                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2643                         assoc->server->cql_transform, bsrr->query);
2644             if (srw_errcode)
2645                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2646         }
2647         if (!bsrr->errcode)
2648             (assoc->init->bend_search)(assoc->backend, bsrr);
2649         if (!bsrr->request)  /* backend not ready with the search response */
2650             return 0;  /* should not be used any more */
2651     }
2652     else
2653     {
2654         /* FIXME - make a diagnostic for it */
2655         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2656     }
2657     return response_searchRequest(assoc, reqb, bsrr, fd);
2658 }
2659
2660 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2661
2662 /*
2663  * Prepare a searchresponse based on the backend results. We probably want
2664  * to look at making the fetching of records nonblocking as well, but
2665  * so far, we'll keep things simple.
2666  * If bsrt is null, that means we're called in response to a communications
2667  * event, and we'll have to get the response for ourselves.
2668  */
2669 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2670     bend_search_rr *bsrt, int *fd)
2671 {
2672     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2673     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2674     Z_SearchResponse *resp = (Z_SearchResponse *)
2675         odr_malloc (assoc->encode, sizeof(*resp));
2676     int *nulint = odr_intdup (assoc->encode, 0);
2677     bool_t *sr = odr_intdup(assoc->encode, 1);
2678     int *next = odr_intdup(assoc->encode, 0);
2679     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2680     int returnedrecs=0;
2681
2682     apdu->which = Z_APDU_searchResponse;
2683     apdu->u.searchResponse = resp;
2684     resp->referenceId = req->referenceId;
2685     resp->additionalSearchInfo = 0;
2686     resp->otherInfo = 0;
2687     *fd = -1;
2688     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2689     {
2690         yaz_log(YLOG_FATAL, "Bad result from backend");
2691         return 0;
2692     }
2693     else if (bsrt->errcode)
2694     {
2695         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2696         resp->resultCount = nulint;
2697         resp->numberOfRecordsReturned = nulint;
2698         resp->nextResultSetPosition = nulint;
2699         resp->searchStatus = nulint;
2700         resp->resultSetStatus = none;
2701         resp->presentStatus = 0;
2702     }
2703     else
2704     {
2705         int *toget = odr_intdup(assoc->encode, 0);
2706         int *presst = odr_intdup(assoc->encode, 0);
2707         Z_RecordComposition comp, *compp = 0;
2708
2709         yaz_log (log_requestdetail, "resultCount: %d", bsrt->hits);
2710
2711         resp->records = 0;
2712         resp->resultCount = &bsrt->hits;
2713
2714         comp.which = Z_RecordComp_simple;
2715         /* how many records does the user agent want, then? */
2716         if (bsrt->hits <= *req->smallSetUpperBound)
2717         {
2718             *toget = bsrt->hits;
2719             if ((comp.u.simple = req->smallSetElementSetNames))
2720                 compp = &comp;
2721         }
2722         else if (bsrt->hits < *req->largeSetLowerBound)
2723         {
2724             *toget = *req->mediumSetPresentNumber;
2725             if (*toget > bsrt->hits)
2726                 *toget = bsrt->hits;
2727             if ((comp.u.simple = req->mediumSetElementSetNames))
2728                 compp = &comp;
2729         }
2730         else
2731             *toget = 0;
2732
2733         if (*toget && !resp->records)
2734         {
2735             oident *prefformat;
2736             oid_value form;
2737
2738             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2739                 form = VAL_NONE;
2740             else
2741                 form = prefformat->value;
2742
2743             /* Call bend_present if defined */
2744             if (assoc->init->bend_present)
2745             {
2746                 bend_present_rr *bprr = (bend_present_rr *)
2747                     nmem_malloc (reqb->request_mem, sizeof(*bprr));
2748                 bprr->setname = req->resultSetName;
2749                 bprr->start = 1;
2750                 bprr->number = *toget;
2751                 bprr->format = form;
2752                 bprr->comp = compp;
2753                 bprr->referenceId = req->referenceId;
2754                 bprr->stream = assoc->encode;
2755                 bprr->print = assoc->print;
2756                 bprr->request = reqb;
2757                 bprr->association = assoc;
2758                 bprr->errcode = 0;
2759                 bprr->errstring = NULL;
2760                 (*assoc->init->bend_present)(assoc->backend, bprr);
2761
2762                 if (!bprr->request)
2763                     return 0;
2764                 if (bprr->errcode)
2765                 {
2766                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2767                     *resp->presentStatus = Z_PresentStatus_failure;
2768                 }
2769             }
2770
2771             if (!resp->records)
2772                 resp->records = pack_records(assoc, req->resultSetName, 1,
2773                                              toget, compp, next, presst, form, req->referenceId,
2774                                              req->preferredRecordSyntax, NULL);
2775             if (!resp->records)
2776                 return 0;
2777             resp->numberOfRecordsReturned = toget;
2778             returnedrecs = *toget;
2779             resp->nextResultSetPosition = next;
2780             resp->searchStatus = sr;
2781             resp->resultSetStatus = 0;
2782             resp->presentStatus = presst;
2783         }
2784         else
2785         {
2786             if (*resp->resultCount)
2787                 *next = 1;
2788             resp->numberOfRecordsReturned = nulint;
2789             resp->nextResultSetPosition = next;
2790             resp->searchStatus = sr;
2791             resp->resultSetStatus = 0;
2792             resp->presentStatus = 0;
2793         }
2794     }
2795     resp->additionalSearchInfo = bsrt->search_info;
2796
2797     if (log_request)
2798     {
2799         int i;
2800         WRBUF wr = wrbuf_alloc();
2801
2802         for (i = 0 ; i < req->num_databaseNames; i++){
2803             if (i)
2804                 wrbuf_printf(wr, "+");
2805             wrbuf_printf(wr, req->databaseNames[i]);
2806         }
2807         wrbuf_printf(wr, " ");
2808
2809         if (bsrt->errcode)
2810             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2811         else
2812             wrbuf_printf(wr, "OK %d", bsrt->hits);
2813         wrbuf_printf(wr, " %s 1+%d ",
2814                      req->resultSetName, returnedrecs);
2815         yaz_query_to_wrbuf(wr, req->query);
2816
2817         yaz_log(log_request, "Search %s", wrbuf_buf(wr));
2818         wrbuf_free(wr, 1);
2819     }
2820     return apdu;
2821 }
2822
2823 /*
2824  * Maybe we got a little over-friendly when we designed bend_fetch to
2825  * get only one record at a time. Some backends can optimise multiple-record
2826  * fetches, and at any rate, there is some overhead involved in
2827  * all that selecting and hopping around. Problem is, of course, that the
2828  * frontend can't know ahead of time how many records it'll need to
2829  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2830  * is downright lousy as a bulk data transfer protocol.
2831  *
2832  * To start with, we'll do the fetching of records from the backend
2833  * in one operation: To save some trips in and out of the event-handler,
2834  * and to simplify the interface to pack_records. At any rate, asynch
2835  * operation is more fun in operations that have an unpredictable execution
2836  * speed - which is normally more true for search than for present.
2837  */
2838 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2839                                       int *fd)
2840 {
2841     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2842     oident *prefformat;
2843     oid_value form;
2844     Z_APDU *apdu;
2845     Z_PresentResponse *resp;
2846     int *next;
2847     int *num;
2848     int errcode = 0;
2849     const char *errstring = 0;
2850
2851     yaz_log(log_requestdetail, "Got PresentRequest.");
2852
2853     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2854         form = VAL_NONE;
2855     else
2856         form = prefformat->value;
2857     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2858     resp->records = 0;
2859     resp->presentStatus = odr_intdup(assoc->encode, 0);
2860     if (assoc->init->bend_present)
2861     {
2862         bend_present_rr *bprr = (bend_present_rr *)
2863             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2864         bprr->setname = req->resultSetId;
2865         bprr->start = *req->resultSetStartPoint;
2866         bprr->number = *req->numberOfRecordsRequested;
2867         bprr->format = form;
2868         bprr->comp = req->recordComposition;
2869         bprr->referenceId = req->referenceId;
2870         bprr->stream = assoc->encode;
2871         bprr->print = assoc->print;
2872         bprr->request = reqb;
2873         bprr->association = assoc;
2874         bprr->errcode = 0;
2875         bprr->errstring = NULL;
2876         (*assoc->init->bend_present)(assoc->backend, bprr);
2877
2878         if (!bprr->request)
2879             return 0; /* should not happen */
2880         if (bprr->errcode)
2881         {
2882             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2883             *resp->presentStatus = Z_PresentStatus_failure;
2884             errcode = bprr->errcode;
2885             errstring = bprr->errstring;
2886         }
2887     }
2888     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2889     next = odr_intdup(assoc->encode, 0);
2890     num = odr_intdup(assoc->encode, 0);
2891
2892     apdu->which = Z_APDU_presentResponse;
2893     apdu->u.presentResponse = resp;
2894     resp->referenceId = req->referenceId;
2895     resp->otherInfo = 0;
2896
2897     if (!resp->records)
2898     {
2899         *num = *req->numberOfRecordsRequested;
2900         resp->records =
2901             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2902                          num, req->recordComposition, next,
2903                          resp->presentStatus,
2904                          form, req->referenceId, req->preferredRecordSyntax,
2905                          &errcode);
2906     }
2907     if (log_request)
2908     {
2909         WRBUF wr = wrbuf_alloc();
2910         wrbuf_printf(wr, "Present ");
2911
2912         if (*resp->presentStatus == Z_PresentStatus_failure)
2913             wrbuf_printf(wr, "ERROR %d ", errcode);
2914         else if (*resp->presentStatus == Z_PresentStatus_success)
2915             wrbuf_printf(wr, "OK -  ");
2916         else
2917             wrbuf_printf(wr, "Partial %d - ", *resp->presentStatus);
2918
2919         wrbuf_printf(wr, " %s %d+%d ",
2920                 req->resultSetId, *req->resultSetStartPoint,
2921                 *req->numberOfRecordsRequested);
2922         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2923         wrbuf_free(wr, 1);
2924     }
2925     if (!resp->records)
2926         return 0;
2927     resp->numberOfRecordsReturned = num;
2928     resp->nextResultSetPosition = next;
2929
2930     return apdu;
2931 }
2932
2933 /*
2934  * Scan was implemented rather in a hurry, and with support for only the basic
2935  * elements of the service in the backend API. Suggestions are welcome.
2936  */
2937 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2938 {
2939     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2940     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2941     Z_ScanResponse *res = (Z_ScanResponse *)
2942         odr_malloc (assoc->encode, sizeof(*res));
2943     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2944     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2945     Z_ListEntries *ents = (Z_ListEntries *)
2946         odr_malloc (assoc->encode, sizeof(*ents));
2947     Z_DiagRecs *diagrecs_p = NULL;
2948     oident *attset;
2949     bend_scan_rr *bsrr = (bend_scan_rr *)
2950         odr_malloc (assoc->encode, sizeof(*bsrr));
2951     struct scan_entry *save_entries;
2952
2953     yaz_log(log_requestdetail, "Got ScanRequest");
2954
2955     apdu->which = Z_APDU_scanResponse;
2956     apdu->u.scanResponse = res;
2957     res->referenceId = req->referenceId;
2958
2959     /* if step is absent, set it to 0 */
2960     res->stepSize = odr_intdup(assoc->encode, 0);
2961     if (req->stepSize)
2962         *res->stepSize = *req->stepSize;
2963
2964     res->scanStatus = scanStatus;
2965     res->numberOfEntriesReturned = numberOfEntriesReturned;
2966     res->positionOfTerm = 0;
2967     res->entries = ents;
2968     ents->num_entries = 0;
2969     ents->entries = NULL;
2970     ents->num_nonsurrogateDiagnostics = 0;
2971     ents->nonsurrogateDiagnostics = NULL;
2972     res->attributeSet = 0;
2973     res->otherInfo = 0;
2974
2975     if (req->databaseNames)
2976     {
2977         int i;
2978         for (i = 0; i < req->num_databaseNames; i++)
2979             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2980     }
2981     bsrr->scanClause = 0;
2982     bsrr->errcode = 0;
2983     bsrr->errstring = 0;
2984     bsrr->num_bases = req->num_databaseNames;
2985     bsrr->basenames = req->databaseNames;
2986     bsrr->num_entries = *req->numberOfTermsRequested;
2987     bsrr->term = req->termListAndStartPoint;
2988     bsrr->referenceId = req->referenceId;
2989     bsrr->stream = assoc->encode;
2990     bsrr->print = assoc->print;
2991     bsrr->step_size = res->stepSize;
2992     bsrr->entries = 0;
2993     /* For YAZ 2.0 and earlier it was the backend handler that
2994        initialized entries (member display_term did not exist)
2995        YAZ 2.0 and later sets 'entries'  and initialize all members
2996        including 'display_term'. If YAZ 2.0 or later sees that
2997        entries was modified - we assume that it is an old handler and
2998        that 'display_term' is _not_ set.
2999     */
3000     if (bsrr->num_entries > 0)
3001     {
3002         int i;
3003         bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3004                                    bsrr->num_entries);
3005         for (i = 0; i<bsrr->num_entries; i++)
3006         {
3007             bsrr->entries[i].term = 0;
3008             bsrr->entries[i].occurrences = 0;
3009             bsrr->entries[i].errcode = 0;
3010             bsrr->entries[i].errstring = 0;
3011             bsrr->entries[i].display_term = 0;
3012         }
3013     }
3014     save_entries = bsrr->entries;  /* save it so we can compare later */
3015
3016     if (req->attributeSet &&
3017         (attset = oid_getentbyoid(req->attributeSet)) &&
3018         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
3019         bsrr->attributeset = attset->value;
3020     else
3021         bsrr->attributeset = VAL_NONE;
3022     log_scan_term_level (log_requestdetail, req->termListAndStartPoint,
3023             bsrr->attributeset);
3024     bsrr->term_position = req->preferredPositionInResponse ?
3025         *req->preferredPositionInResponse : 1;
3026
3027     ((int (*)(void *, bend_scan_rr *))
3028      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3029
3030     if (bsrr->errcode)
3031         diagrecs_p = zget_DiagRecs(assoc->encode,
3032                                    bsrr->errcode, bsrr->errstring);
3033     else
3034     {
3035         int i;
3036         Z_Entry **tab = (Z_Entry **)
3037             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
3038
3039         if (bsrr->status == BEND_SCAN_PARTIAL)
3040             *scanStatus = Z_Scan_partial_5;
3041         else
3042             *scanStatus = Z_Scan_success;
3043         ents->entries = tab;
3044         ents->num_entries = bsrr->num_entries;
3045         res->numberOfEntriesReturned = &ents->num_entries;
3046         res->positionOfTerm = &bsrr->term_position;
3047         for (i = 0; i < bsrr->num_entries; i++)
3048         {
3049             Z_Entry *e;
3050             Z_TermInfo *t;
3051             Odr_oct *o;
3052
3053             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3054             if (bsrr->entries[i].occurrences >= 0)
3055             {
3056                 e->which = Z_Entry_termInfo;
3057                 e->u.termInfo = t = (Z_TermInfo *)
3058                     odr_malloc(assoc->encode, sizeof(*t));
3059                 t->suggestedAttributes = 0;
3060                 t->displayTerm = 0;
3061                 if (save_entries == bsrr->entries &&
3062                     bsrr->entries[i].display_term)
3063                 {
3064                     /* the entries was _not_ set by the handler. So it's
3065                        safe to test for new member display_term. It is
3066                        NULL'ed by us.
3067                     */
3068                     t->displayTerm = odr_strdup(assoc->encode,
3069                                                 bsrr->entries[i].display_term);
3070                 }
3071                 t->alternativeTerm = 0;
3072                 t->byAttributes = 0;
3073                 t->otherTermInfo = 0;
3074                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3075                 t->term = (Z_Term *)
3076                     odr_malloc(assoc->encode, sizeof(*t->term));
3077                 t->term->which = Z_Term_general;
3078                 t->term->u.general = o =
3079                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3080                 o->buf = (unsigned char *)
3081                     odr_malloc(assoc->encode, o->len = o->size =
3082                                strlen(bsrr->entries[i].term));
3083                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3084                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3085                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3086             }
3087             else
3088             {
3089                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3090                                                   bsrr->entries[i].errcode,
3091                                                   bsrr->entries[i].errstring);
3092                 assert (drecs->num_diagRecs == 1);
3093                 e->which = Z_Entry_surrogateDiagnostic;
3094                 assert (drecs->diagRecs[0]);
3095                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3096             }
3097         }
3098     }
3099     if (diagrecs_p)
3100     {
3101         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3102         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3103     }
3104     if (log_request)
3105     {
3106         int i;
3107         WRBUF wr = wrbuf_alloc();
3108         wrbuf_printf(wr, "Scan ");
3109         for (i = 0 ; i < req->num_databaseNames; i++){
3110             if (i)
3111                 wrbuf_printf(wr, "+");
3112             wrbuf_printf(wr, req->databaseNames[i]);
3113         }
3114         wrbuf_printf(wr, " ");
3115
3116         if (bsrr->errcode){
3117             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3118             wrbuf_printf(wr, " ");
3119         }
3120         else
3121             wrbuf_printf(wr, "OK ");
3122         /* else if (*res->scanStatus == Z_Scan_success) */
3123         /*    wrbuf_printf(wr, "OK "); */
3124         /* else */
3125         /* wrbuf_printf(wr, "Partial "); */
3126
3127         if (*res->numberOfEntriesReturned)
3128             wrbuf_printf(wr, "%d - ", *res->numberOfEntriesReturned);
3129         else
3130             wrbuf_printf(wr, "0 - ");
3131
3132         wrbuf_printf(wr, "%d+%d+%d ",
3133                      (req->preferredPositionInResponse ?
3134                       *req->preferredPositionInResponse : 1),
3135                      *req->numberOfTermsRequested,
3136                      (res->stepSize ? *res->stepSize : 1));
3137
3138         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3139                           bsrr->attributeset);
3140         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3141         wrbuf_free(wr, 1);
3142     }
3143     return apdu;
3144 }
3145
3146 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3147     int *fd)
3148 {
3149     int i;
3150     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3151     Z_SortResponse *res = (Z_SortResponse *)
3152         odr_malloc (assoc->encode, sizeof(*res));
3153     bend_sort_rr *bsrr = (bend_sort_rr *)
3154         odr_malloc (assoc->encode, sizeof(*bsrr));
3155
3156     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3157
3158     yaz_log(log_requestdetail, "Got SortRequest.");
3159
3160     bsrr->num_input_setnames = req->num_inputResultSetNames;
3161     for (i=0;i<req->num_inputResultSetNames;i++)
3162         yaz_log(log_requestdetail, "Input resultset: '%s'",
3163                 req->inputResultSetNames[i]);
3164     bsrr->input_setnames = req->inputResultSetNames;
3165     bsrr->referenceId = req->referenceId;
3166     bsrr->output_setname = req->sortedResultSetName;
3167     yaz_log(log_requestdetail, "Output resultset: '%s'",
3168                 req->sortedResultSetName);
3169     bsrr->sort_sequence = req->sortSequence;
3170        /*FIXME - dump those sequences too */
3171     bsrr->stream = assoc->encode;
3172     bsrr->print = assoc->print;
3173
3174     bsrr->sort_status = Z_SortResponse_failure;
3175     bsrr->errcode = 0;
3176     bsrr->errstring = 0;
3177
3178     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3179
3180     res->referenceId = bsrr->referenceId;
3181     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3182     res->resultSetStatus = 0;
3183     if (bsrr->errcode)
3184     {
3185         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3186                                        bsrr->errcode, bsrr->errstring);
3187         res->diagnostics = dr->diagRecs;
3188         res->num_diagnostics = dr->num_diagRecs;
3189     }
3190     else
3191     {
3192         res->num_diagnostics = 0;
3193         res->diagnostics = 0;
3194     }
3195     res->resultCount = 0;
3196     res->otherInfo = 0;
3197
3198     apdu->which = Z_APDU_sortResponse;
3199     apdu->u.sortResponse = res;
3200     if (log_request)
3201     {
3202         WRBUF wr = wrbuf_alloc();
3203         wrbuf_printf(wr, "Sort ");
3204         if (bsrr->errcode)
3205             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3206         else
3207             wrbuf_printf(wr,  "OK -");
3208         wrbuf_printf(wr, " (");
3209         for (i = 0; i<req->num_inputResultSetNames; i++)
3210         {
3211             if (i)
3212                 wrbuf_printf(wr, "+");
3213             wrbuf_printf(wr, req->inputResultSetNames[i]);
3214         }
3215         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3216
3217         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3218         wrbuf_free(wr, 1);
3219     }
3220     return apdu;
3221 }
3222
3223 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3224     int *fd)
3225 {
3226     int i;
3227     Z_DeleteResultSetRequest *req =
3228         reqb->apdu_request->u.deleteResultSetRequest;
3229     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3230         odr_malloc (assoc->encode, sizeof(*res));
3231     bend_delete_rr *bdrr = (bend_delete_rr *)
3232         odr_malloc (assoc->encode, sizeof(*bdrr));
3233     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3234
3235     yaz_log(log_requestdetail, "Got DeleteRequest.");
3236
3237     bdrr->num_setnames = req->num_resultSetList;
3238     bdrr->setnames = req->resultSetList;
3239     for (i = 0; i<req->num_resultSetList; i++)
3240         yaz_log(log_requestdetail, "resultset: '%s'",
3241                 req->resultSetList[i]);
3242     bdrr->stream = assoc->encode;
3243     bdrr->print = assoc->print;
3244     bdrr->function = *req->deleteFunction;
3245     bdrr->referenceId = req->referenceId;
3246     bdrr->statuses = 0;
3247     if (bdrr->num_setnames > 0)
3248     {
3249         bdrr->statuses = (int*)
3250             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3251                        bdrr->num_setnames);
3252         for (i = 0; i < bdrr->num_setnames; i++)
3253             bdrr->statuses[i] = 0;
3254     }
3255     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3256
3257     res->referenceId = req->referenceId;
3258
3259     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3260
3261     res->deleteListStatuses = 0;
3262     if (bdrr->num_setnames > 0)
3263     {
3264         int i;
3265         res->deleteListStatuses = (Z_ListStatuses *)
3266             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3267         res->deleteListStatuses->num = bdrr->num_setnames;
3268         res->deleteListStatuses->elements =
3269             (Z_ListStatus **)
3270             odr_malloc (assoc->encode,
3271                         sizeof(*res->deleteListStatuses->elements) *
3272                         bdrr->num_setnames);
3273         for (i = 0; i<bdrr->num_setnames; i++)
3274         {
3275             res->deleteListStatuses->elements[i] =
3276                 (Z_ListStatus *)
3277                 odr_malloc (assoc->encode,
3278                             sizeof(**res->deleteListStatuses->elements));
3279             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3280             res->deleteListStatuses->elements[i]->id =
3281                 odr_strdup (assoc->encode, bdrr->setnames[i]);
3282         }
3283     }
3284     res->numberNotDeleted = 0;
3285     res->bulkStatuses = 0;
3286     res->deleteMessage = 0;
3287     res->otherInfo = 0;
3288
3289     apdu->which = Z_APDU_deleteResultSetResponse;
3290     apdu->u.deleteResultSetResponse = res;
3291     if (log_request)
3292     {
3293         WRBUF wr = wrbuf_alloc();
3294         wrbuf_printf(wr, "Delete ");
3295         if (bdrr->delete_status)
3296             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3297         else
3298             wrbuf_printf(wr, "OK -");
3299         for (i = 0; i<req->num_resultSetList; i++)
3300             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3301         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3302         wrbuf_free(wr, 1);
3303     }
3304     return apdu;
3305 }
3306
3307 static void process_close(association *assoc, request *reqb)
3308 {
3309     Z_Close *req = reqb->apdu_request->u.close;
3310     static char *reasons[] =
3311     {
3312         "finished",
3313         "shutdown",
3314         "systemProblem",
3315         "costLimit",
3316         "resources",
3317         "securityViolation",
3318         "protocolError",
3319         "lackOfActivity",
3320         "peerAbort",
3321         "unspecified"
3322     };
3323
3324     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3325         reasons[*req->closeReason], req->diagnosticInformation ?
3326         req->diagnosticInformation : "NULL");
3327     if (assoc->version < 3) /* to make do_force respond with close */
3328         assoc->version = 3;
3329     do_close_req(assoc, Z_Close_finished,
3330                  "Association terminated by client", reqb);
3331     yaz_log(log_request,"Close OK");
3332 }
3333
3334 void save_referenceId (request *reqb, Z_ReferenceId *refid)
3335 {
3336     if (refid)
3337     {
3338         reqb->len_refid = refid->len;
3339         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
3340         memcpy (reqb->refid, refid->buf, refid->len);
3341     }
3342     else
3343     {
3344         reqb->len_refid = 0;
3345         reqb->refid = NULL;
3346     }
3347 }
3348
3349 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
3350 {
3351     process_z_response (a, req, res);
3352 }
3353
3354 bend_request bend_request_mk (bend_association a)
3355 {
3356     request *nreq = request_get (&a->outgoing);
3357     nreq->request_mem = nmem_create ();
3358     return nreq;
3359 }
3360
3361 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
3362 {
3363     Z_ReferenceId *id;
3364     if (!req->refid)
3365         return 0;
3366     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
3367     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
3368     id->len = id->size = req->len_refid;
3369     memcpy (id->buf, req->refid, req->len_refid);
3370     return id;
3371 }
3372
3373 void bend_request_destroy (bend_request *req)
3374 {
3375     nmem_destroy((*req)->request_mem);
3376     request_release(*req);
3377     *req = NULL;
3378 }
3379
3380 int bend_backend_respond (bend_association a, bend_request req)
3381 {
3382     char *msg;
3383     int r;
3384     r = process_z_request (a, req, &msg);
3385     if (r < 0)
3386         yaz_log (YLOG_WARN, "%s", msg);
3387     return r;
3388 }
3389
3390 void bend_request_setdata(bend_request r, void *p)
3391 {
3392     r->clientData = p;
3393 }
3394
3395 void *bend_request_getdata(bend_request r)
3396 {
3397     return r->clientData;
3398 }
3399
3400 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
3401 {
3402     bend_segment_rr req;
3403
3404     req.segment = reqb->apdu_request->u.segmentRequest;
3405     req.stream = assoc->encode;
3406     req.decode = assoc->decode;
3407     req.print = assoc->print;
3408     req.association = assoc;
3409
3410     (*assoc->init->bend_segment)(assoc->backend, &req);
3411
3412     return 0;
3413 }
3414
3415 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3416 {
3417     bend_esrequest_rr esrequest;
3418     const char *ext_name = "unknown";
3419
3420     Z_ExtendedServicesRequest *req =
3421         reqb->apdu_request->u.extendedServicesRequest;
3422     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3423
3424     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3425
3426     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3427     esrequest.stream = assoc->encode;
3428     esrequest.decode = assoc->decode;
3429     esrequest.print = assoc->print;
3430     esrequest.errcode = 0;
3431     esrequest.errstring = NULL;
3432     esrequest.request = reqb;
3433     esrequest.association = assoc;
3434     esrequest.taskPackage = 0;
3435     esrequest.referenceId = req->referenceId;
3436
3437
3438     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3439     {
3440         switch(esrequest.esr->taskSpecificParameters->which)
3441         {
3442         case Z_External_itemOrder:
3443             ext_name = "ItemOrder"; break;
3444         case Z_External_update:
3445             ext_name = "Update"; break;
3446         case Z_External_update0:
3447             ext_name = "Update0"; break;
3448         case Z_External_ESAdmin:
3449             ext_name = "Admin"; break;
3450
3451         }
3452     }
3453
3454     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3455
3456     /* If the response is being delayed, return NULL */
3457     if (esrequest.request == NULL)
3458         return(NULL);
3459
3460     resp->referenceId = req->referenceId;
3461
3462     if (esrequest.errcode == -1)
3463     {
3464         /* Backend service indicates request will be processed */
3465         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3466         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3467     }
3468     else if (esrequest.errcode == 0)
3469     {
3470         /* Backend service indicates request will be processed */
3471         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3472         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3473     }
3474     else
3475     {
3476         Z_DiagRecs *diagRecs =
3477             zget_DiagRecs(assoc->encode, esrequest.errcode,
3478                           esrequest.errstring);
3479         /* Backend indicates error, request will not be processed */
3480         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3481         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3482         resp->num_diagnostics = diagRecs->num_diagRecs;
3483         resp->diagnostics = diagRecs->diagRecs;
3484         if (log_request)
3485         {
3486             WRBUF wr = wrbuf_alloc();
3487             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3488             yaz_log(log_request, "EsRequest %s", wrbuf_buf(wr) );
3489             wrbuf_free(wr, 1);
3490         }
3491
3492     }
3493     /* Do something with the members of bend_extendedservice */
3494     if (esrequest.taskPackage)
3495         resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED,
3496                                          (const char *)  esrequest.taskPackage,
3497                                           -1);
3498     yaz_log(YLOG_DEBUG,"Send the result apdu");
3499     return apdu;
3500 }
3501
3502 /*
3503  * Local variables:
3504  * c-basic-offset: 4
3505  * indent-tabs-mode: nil
3506  * End:
3507  * vim: shiftwidth=4 tabstop=8 expandtab
3508  */
3509