src/seshigh.c

   1 /* This file is part of the YAZ toolkit.
   2  * Copyright (C) 1995-2010 Index Data
   3  * See the file LICENSE for details.
   4  */
   5 /**
   6  * \file seshigh.c
   7  * \brief Implements GFS session logic.
   8  *
   9  * Frontend server logic.
  10  *
  11  * This code receives incoming APDUs, and handles client requests by means
  12  * of the backend API.
  13  *
  14  * Some of the code is getting quite involved, compared to simpler servers -
  15  * primarily because it is asynchronous both in the communication with
  16  * the user and the backend. We think the complexity will pay off in
  17  * the form of greater flexibility when more asynchronous facilities
  18  * are implemented.
  19  *
  20  * Memory management has become somewhat involved. In the simple case, where
  21  * only one PDU is pending at a time, it will simply reuse the same memory,
  22  * once it has found its working size. When we enable multiple concurrent
  23  * operations, perhaps even with multiple parallel calls to the backend, it
  24  * will maintain a pool of buffers for encoding and decoding, trying to
  25  * minimize memory allocation/deallocation during normal operation.
  26  *
  27  */
  28
  29 #include <limits.h>
  30 #include <stdlib.h>
  31 #include <stdio.h>
  32 #include <assert.h>
  33 #include <ctype.h>
  34
  35 #if HAVE_SYS_TYPES_H
  36 #include <sys/types.h>
  37 #endif
  38 #if HAVE_SYS_STAT_H
  39 #include <sys/stat.h>
  40 #endif
  41
  42 #ifdef WIN32
  43 #include <io.h>
  44 #define S_ISREG(x) (x & _S_IFREG)
  45 #include <process.h>
  46 #endif
  47
  48 #if HAVE_UNISTD_H
  49 #include <unistd.h>
  50 #endif
  51
  52 #if YAZ_HAVE_XML2
  53 #include <libxml/parser.h>
  54 #include <libxml/tree.h>
  55 #endif
  56
  57 #include <yaz/yconfig.h>
  58 #include <yaz/xmalloc.h>
  59 #include <yaz/comstack.h>
  60 #include "eventl.h"
  61 #include "session.h"
  62 #include "mime.h"
  63 #include <yaz/proto.h>
  64 #include <yaz/oid_db.h>
  65 #include <yaz/log.h>
  66 #include <yaz/logrpn.h>
  67 #include <yaz/querytowrbuf.h>
  68 #include <yaz/statserv.h>
  69 #include <yaz/diagbib1.h>
  70 #include <yaz/charneg.h>
  71 #include <yaz/otherinfo.h>
  72 #include <yaz/yaz-util.h>
  73 #include <yaz/pquery.h>
  74 #include <yaz/oid_db.h>
  75
  76 #include <yaz/srw.h>
  77 #include <yaz/backend.h>
  78 #include <yaz/yaz-ccl.h>
  79
  80 static void process_gdu_request(association *assoc, request *req);
  81 static int process_z_request(association *assoc, request *req, char **msg);
  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 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  89                                       bend_search_rr *bsrr);
  90 static Z_APDU *process_presentRequest(association *assoc, request *reqb);
  91 static Z_APDU *process_scanRequest(association *assoc, request *reqb);
  92 static Z_APDU *process_sortRequest(association *assoc, request *reqb);
  93 static void process_close(association *assoc, request *reqb);
  94 static Z_APDU *process_deleteRequest(association *assoc, request *reqb);
  95 static Z_APDU *process_segmentRequest(association *assoc, request *reqb);
  96 static Z_APDU *process_ESRequest(association *assoc, request *reqb);
  97
  98 /* dynamic logging levels */
  99 static int logbits_set = 0;
 100 static int log_session = 0; /* one-line logs for session */
 101 static int log_sessiondetail = 0; /* more detailed stuff */
 102 static int log_request = 0; /* one-line logs for requests */
 103 static int log_requestdetail = 0;  /* more detailed stuff */
 104
 105 /** get_logbits sets global loglevel bits */
 106 static void get_logbits(void)
 107 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 108     if (!logbits_set)
 109     {
 110         logbits_set = 1;
 111         log_session = yaz_log_module_level("session");
 112         log_sessiondetail = yaz_log_module_level("sessiondetail");
 113         log_request = yaz_log_module_level("request");
 114         log_requestdetail = yaz_log_module_level("requestdetail");
 115     }
 116 }
 117
 118 static void wr_diag(WRBUF w, int error, const char *addinfo)
 119 {
 120     wrbuf_printf(w, "ERROR %d+", error);
 121     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
 122     if (addinfo)
 123     {
 124         wrbuf_puts(w, "+");
 125         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
 126     }
 127     wrbuf_puts(w, " ");
 128 }
 129
 130 static int odr_int_to_int(Odr_int v)
 131 {
 132     if (v >= INT_MAX)
 133         return INT_MAX;
 134     else if (v <= INT_MIN)
 135         return INT_MIN;
 136     else
 137         return (int) v;
 138 }
 139
 140 /*
 141  * Create and initialize a new association-handle.
 142  *  channel  : iochannel for the current line.
 143  *  link     : communications channel.
 144  * Returns: 0 or a new association handle.
 145  */
 146 association *create_association(IOCHAN channel, COMSTACK link,
 147                                 const char *apdufile)
 148 {
 149     association *anew;
 150
 151     if (!logbits_set)
 152         get_logbits();
 153     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 154         return 0;
 155     anew->init = 0;
 156     anew->version = 0;
 157     anew->last_control = 0;
 158     anew->client_chan = channel;
 159     anew->client_link = link;
 160     anew->cs_get_mask = 0;
 161     anew->cs_put_mask = 0;
 162     anew->cs_accept_mask = 0;
 163     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 164         !(anew->encode = odr_createmem(ODR_ENCODE)))
 165         return 0;
 166     if (apdufile && *apdufile)
 167     {
 168         FILE *f;
 169
 170         if (!(anew->print = odr_createmem(ODR_PRINT)))
 171             return 0;
 172         if (*apdufile == '@')
 173         {
 174             odr_setprint(anew->print, yaz_log_file());
 175         }
 176         else if (*apdufile != '-')
 177         {
 178             char filename[256];
 179             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 180             if (!(f = fopen(filename, "w")))
 181             {
 182                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 183                 return 0;
 184             }
 185             setvbuf(f, 0, _IONBF, 0);
 186             odr_setprint(anew->print, f);
 187         }
 188     }
 189     else
 190         anew->print = 0;
 191     anew->input_buffer = 0;
 192     anew->input_buffer_len = 0;
 193     anew->backend = 0;
 194     anew->state = ASSOC_NEW;
 195     request_initq(&anew->incoming);
 196     request_initq(&anew->outgoing);
 197     anew->proto = cs_getproto(link);
 198     anew->server = 0;
 199     return anew;
 200 }
 201
 202 /*
 203  * Free association and release resources.
 204  */
 205 void destroy_association(association *h)
 206 {
 207     statserv_options_block *cb = statserv_getcontrol();
 208     request *req;
 209
 210     xfree(h->init);
 211     odr_destroy(h->decode);
 212     odr_destroy(h->encode);
 213     if (h->print)
 214         odr_destroy(h->print);
 215     if (h->input_buffer)
 216     xfree(h->input_buffer);
 217     if (h->backend)
 218         (*cb->bend_close)(h->backend);
 219     while ((req = request_deq(&h->incoming)))
 220         request_release(req);
 221     while ((req = request_deq(&h->outgoing)))
 222         request_release(req);
 223     request_delq(&h->incoming);
 224     request_delq(&h->outgoing);
 225     xfree(h);
 226     xmalloc_trav("session closed");
 227     if (cb && cb->one_shot)
 228     {
 229         exit(0);
 230     }
 231 }
 232
 233 static void do_close_req(association *a, int reason, char *message,
 234                          request *req)
 235 {
 236     Z_APDU *apdu = zget_APDU(a->encode, Z_APDU_close);
 237     Z_Close *cls = apdu->u.close;
 238
 239     /* Purge request queue */
 240     while (request_deq(&a->incoming));
 241     while (request_deq(&a->outgoing));
 242     if (a->version >= 3)
 243     {
 244         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 245             reason, message ? message : "none");
 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 int ir_read(IOCHAN h, int event)
 269 {
 270     association *assoc = (association *)iochan_getdata(h);
 271     COMSTACK conn = assoc->client_link;
 272     request *req;
 273
 274     if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 275     {
 276         yaz_log(YLOG_DEBUG, "ir_session (input)");
 277         /* We aren't speaking to this fellow */
 278         if (assoc->state == ASSOC_DEAD)
 279         {
 280             yaz_log(log_sessiondetail, "Connection closed - end of session");
 281             cs_close(conn);
 282             destroy_association(assoc);
 283             iochan_destroy(h);
 284             return 0;
 285         }
 286         assoc->cs_get_mask = EVENT_INPUT;
 287
 288         do
 289         {
 290             int res = cs_get(conn, &assoc->input_buffer,
 291                              &assoc->input_buffer_len);
 292             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 293             {
 294                 yaz_log(log_session, "Connection error: %s res=%d",
 295                         cs_errmsg(cs_errno(conn)), res);
 296                 req = request_get(&assoc->incoming); /* get a new request */
 297                 do_close_req(assoc, Z_Close_protocolError,
 298                              "Incoming package too large", req);
 299                 return 0;
 300             }
 301             else if (res <= 0)
 302             {
 303                 yaz_log(log_session, "Connection closed by client");
 304                 assoc->state = ASSOC_DEAD;
 305                 return 0;
 306             }
 307             else if (res == 1) /* incomplete read - wait for more  */
 308             {
 309                 if (conn->io_pending & CS_WANT_WRITE)
 310                     assoc->cs_get_mask |= EVENT_OUTPUT;
 311                 iochan_setflag(h, assoc->cs_get_mask);
 312                 return 0;
 313             }
 314             /* we got a complete PDU. Let's decode it */
 315             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 316                     assoc->input_buffer[0] & 0xff,
 317                     assoc->input_buffer[1] & 0xff,
 318                     assoc->input_buffer[2] & 0xff);
 319             req = request_get(&assoc->incoming); /* get a new request */
 320             odr_reset(assoc->decode);
 321             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 322             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 323             {
 324                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 325                         "[near byte %ld] ",
 326                         odr_errmsg(odr_geterror(assoc->decode)),
 327                         odr_getelement(assoc->decode),
 328                         (long) odr_offset(assoc->decode));
 329                 if (assoc->decode->error != OHTTP)
 330                 {
 331                     yaz_log(YLOG_WARN, "PDU dump:");
 332                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 333                     request_release(req);
 334                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 335                 }
 336                 else
 337                 {
 338                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 339                     assoc->state = ASSOC_DEAD;
 340                     process_gdu_response(assoc, req, p);
 341                 }
 342                 return 0;
 343             }
 344             req->request_mem = odr_extract_mem(assoc->decode);
 345             if (assoc->print)
 346             {
 347                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 348                     yaz_log(YLOG_WARN, "ODR print error: %s",
 349                             odr_errmsg(odr_geterror(assoc->print)));
 350                 odr_reset(assoc->print);
 351             }
 352             request_enq(&assoc->incoming, req);
 353         }
 354         while (cs_more(conn));
 355     }
 356     return 1;
 357 }
 358
 359 /*
 360  * This is where PDUs from the client are read and the further
 361  * processing is initiated. Flow of control moves down through the
 362  * various process_* functions below, until the encoded result comes back up
 363  * to the output handler in here.
 364  *
 365  *  h     : the I/O channel that has an outstanding event.
 366  *  event : the current outstanding event.
 367  */
 368 void ir_session(IOCHAN h, int event)
 369 {
 370     int res;
 371     association *assoc = (association *)iochan_getdata(h);
 372     COMSTACK conn = assoc->client_link;
 373     request *req;
 374
 375     assert(h && conn && assoc);
 376     if (event == EVENT_TIMEOUT)
 377     {
 378         if (assoc->state != ASSOC_UP)
 379         {
 380             yaz_log(log_session, "Timeout. Closing connection");
 381             /* do we need to lod this at all */
 382             cs_close(conn);
 383             destroy_association(assoc);
 384             iochan_destroy(h);
 385         }
 386         else
 387         {
 388             yaz_log(log_sessiondetail, "Timeout. Sending Z39.50 Close");
 389             do_close(assoc, Z_Close_lackOfActivity, 0);
 390         }
 391         return;
 392     }
 393     if (event & assoc->cs_accept_mask)
 394     {
 395         if (!cs_accept(conn))
 396         {
 397             yaz_log(YLOG_WARN, "accept failed");
 398             destroy_association(assoc);
 399             iochan_destroy(h);
 400             return;
 401         }
 402         iochan_clearflag(h, EVENT_OUTPUT);
 403         if (conn->io_pending)
 404         {   /* cs_accept didn't complete */
 405             assoc->cs_accept_mask =
 406                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 407                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 408
 409             iochan_setflag(h, assoc->cs_accept_mask);
 410         }
 411         else
 412         {   /* cs_accept completed. Prepare for reading (cs_get) */
 413             assoc->cs_accept_mask = 0;
 414             assoc->cs_get_mask = EVENT_INPUT;
 415             iochan_setflag(h, assoc->cs_get_mask);
 416         }
 417         return;
 418     }
 419     if (event & assoc->cs_get_mask) /* input */
 420     {
 421         if (!ir_read(h, event))
 422             return;
 423         req = request_head(&assoc->incoming);
 424         if (req->state == REQUEST_IDLE)
 425         {
 426             request_deq(&assoc->incoming);
 427             process_gdu_request(assoc, req);
 428         }
 429     }
 430     if (event & assoc->cs_put_mask)
 431     {
 432         request *req = request_head(&assoc->outgoing);
 433
 434         assoc->cs_put_mask = 0;
 435         yaz_log(YLOG_DEBUG, "ir_session (output)");
 436         req->state = REQUEST_PENDING;
 437         switch (res = cs_put(conn, req->response, req->len_response))
 438         {
 439         case -1:
 440             yaz_log(log_sessiondetail, "Connection closed by client");
 441             cs_close(conn);
 442             destroy_association(assoc);
 443             iochan_destroy(h);
 444             break;
 445         case 0: /* all sent - release the request structure */
 446             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 447 #if 0
 448             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 449                     req->response);
 450 #endif
 451             nmem_destroy(req->request_mem);
 452             request_deq(&assoc->outgoing);
 453             request_release(req);
 454             if (!request_head(&assoc->outgoing))
 455             {   /* restore mask for cs_get operation ... */
 456                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 457                 iochan_setflag(h, assoc->cs_get_mask);
 458                 if (assoc->state == ASSOC_DEAD)
 459                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 460             }
 461             else
 462             {
 463                 assoc->cs_put_mask = EVENT_OUTPUT;
 464             }
 465             break;
 466         default:
 467             if (conn->io_pending & CS_WANT_WRITE)
 468                 assoc->cs_put_mask |= EVENT_OUTPUT;
 469             if (conn->io_pending & CS_WANT_READ)
 470                 assoc->cs_put_mask |= EVENT_INPUT;
 471             iochan_setflag(h, assoc->cs_put_mask);
 472         }
 473     }
 474     if (event & EVENT_EXCEPT)
 475     {
 476         yaz_log(YLOG_WARN, "ir_session (exception)");
 477         cs_close(conn);
 478         destroy_association(assoc);
 479         iochan_destroy(h);
 480     }
 481 }
 482
 483 static int process_z_request(association *assoc, request *req, char **msg);
 484
 485
 486 static void assoc_init_reset(association *assoc)
 487 {
 488     xfree(assoc->init);
 489     assoc->init = (bend_initrequest *) xmalloc(sizeof(*assoc->init));
 490
 491     assoc->init->stream = assoc->encode;
 492     assoc->init->print = assoc->print;
 493     assoc->init->auth = 0;
 494     assoc->init->referenceId = 0;
 495     assoc->init->implementation_version = 0;
 496     assoc->init->implementation_id = 0;
 497     assoc->init->implementation_name = 0;
 498     assoc->init->query_charset = 0;
 499     assoc->init->records_in_same_charset = 0;
 500     assoc->init->bend_sort = NULL;
 501     assoc->init->bend_search = NULL;
 502     assoc->init->bend_present = NULL;
 503     assoc->init->bend_esrequest = NULL;
 504     assoc->init->bend_delete = NULL;
 505     assoc->init->bend_scan = NULL;
 506     assoc->init->bend_segment = NULL;
 507     assoc->init->bend_fetch = NULL;
 508     assoc->init->bend_explain = NULL;
 509     assoc->init->bend_srw_scan = NULL;
 510     assoc->init->bend_srw_update = NULL;
 511     assoc->init->named_result_sets = 0;
 512
 513     assoc->init->charneg_request = NULL;
 514     assoc->init->charneg_response = NULL;
 515
 516     assoc->init->decode = assoc->decode;
 517     assoc->init->peer_name =
 518         odr_strdup(assoc->encode, cs_addrstr(assoc->client_link));
 519
 520     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 521 }
 522
 523 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 524 {
 525     statserv_options_block *cb = statserv_getcontrol();
 526     if (!assoc->init)
 527     {
 528         const char *encoding = "UTF-8";
 529         Z_External *ce;
 530         bend_initresult *binitres;
 531
 532         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 533         assoc_init_reset(assoc);
 534
 535         if (sr->username)
 536         {
 537             Z_IdAuthentication *auth = (Z_IdAuthentication *)
 538                 odr_malloc(assoc->decode, sizeof(*auth));
 539             size_t len;
 540
 541             len = strlen(sr->username) + 1;
 542             if (sr->password)
 543                 len += strlen(sr->password) + 2;
 544             auth->which = Z_IdAuthentication_open;
 545             auth->u.open = (char *) odr_malloc(assoc->decode, len);
 546             strcpy(auth->u.open, sr->username);
 547             if (sr->password && *sr->password)
 548             {
 549                 strcat(auth->u.open, "/");
 550                 strcat(auth->u.open, sr->password);
 551             }
 552             assoc->init->auth = auth;
 553         }
 554
 555 #if 1
 556         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 557         assoc->init->charneg_request = ce->u.charNeg3;
 558 #endif
 559         assoc->backend = 0;
 560         if (!(binitres = (*cb->bend_init)(assoc->init)))
 561         {
 562             assoc->state = ASSOC_DEAD;
 563             yaz_add_srw_diagnostic(assoc->encode, d, num,
 564                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 565             return 0;
 566         }
 567         assoc->backend = binitres->handle;
 568         assoc->init->auth = 0;
 569         if (binitres->errcode)
 570         {
 571             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 572             assoc->state = ASSOC_DEAD;
 573             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 574                                    binitres->errstring);
 575             return 0;
 576         }
 577         return 1;
 578     }
 579     return 1;
 580 }
 581
 582 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 583 {
 584 #if YAZ_HAVE_XML2
 585     yaz_record_conv_t rc = 0;
 586     const char *match_schema = 0;
 587     Odr_oid *match_syntax = 0;
 588
 589     if (assoc->server)
 590     {
 591         int r;
 592         const char *input_schema = yaz_get_esn(rr->comp);
 593         Odr_oid *input_syntax_raw = rr->request_format;
 594
 595         const char *backend_schema = 0;
 596         Odr_oid *backend_syntax = 0;
 597
 598         r = yaz_retrieval_request(assoc->server->retrieval,
 599                                   input_schema,
 600                                   input_syntax_raw,
 601                                   &match_schema,
 602                                   &match_syntax,
 603                                   &rc,
 604                                   &backend_schema,
 605                                   &backend_syntax);
 606         if (r == -1) /* error ? */
 607         {
 608             const char *details = yaz_retrieval_get_error(
 609                 assoc->server->retrieval);
 610
 611             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 612             if (details)
 613                 rr->errstring = odr_strdup(rr->stream, details);
 614             return -1;
 615         }
 616         else if (r == 1 || r == 3)
 617         {
 618             const char *details = input_schema;
 619             rr->errcode =
 620                 YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
 621             if (details)
 622                 rr->errstring = odr_strdup(rr->stream, details);
 623             return -1;
 624         }
 625         else if (r == 2)
 626         {
 627             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 628             if (input_syntax_raw)
 629             {
 630                 char oidbuf[OID_STR_MAX];
 631                 oid_oid_to_dotstring(input_syntax_raw, oidbuf);
 632                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 633             }
 634             return -1;
 635         }
 636         if (backend_schema)
 637         {
 638             yaz_set_esn(&rr->comp, backend_schema, odr_getmem(rr->stream));
 639         }
 640         if (backend_syntax)
 641             rr->request_format = backend_syntax;
 642     }
 643     (*assoc->init->bend_fetch)(assoc->backend, rr);
 644     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
 645     {   /* post conversion must take place .. */
 646         WRBUF output_record = wrbuf_alloc();
 647         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 648         if (r)
 649         {
 650             const char *details = yaz_record_conv_get_error(rc);
 651             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 652             if (details)
 653                 rr->errstring = odr_strdup(rr->stream, details);
 654         }
 655         else
 656         {
 657             rr->len = wrbuf_len(output_record);
 658             rr->record = (char *) odr_malloc(rr->stream, rr->len);
 659             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 660         }
 661         wrbuf_destroy(output_record);
 662     }
 663     if (match_syntax)
 664         rr->output_format = match_syntax;
 665     if (match_schema)
 666         rr->schema = odr_strdup(rr->stream, match_schema);
 667 #else
 668     (*assoc->init->bend_fetch)(assoc->backend, rr);
 669 #endif
 670     return 0;
 671 }
 672
 673 static int srw_bend_fetch(association *assoc, int pos,
 674                           Z_SRW_searchRetrieveRequest *srw_req,
 675                           Z_SRW_record *record,
 676                           const char **addinfo)
 677 {
 678     bend_fetch_rr rr;
 679     ODR o = assoc->encode;
 680
 681     rr.setname = "default";
 682     rr.number = pos;
 683     rr.referenceId = 0;
 684     rr.request_format = odr_oiddup(assoc->decode, yaz_oid_recsyn_xml);
 685
 686     rr.comp = (Z_RecordComposition *)
 687             odr_malloc(assoc->decode, sizeof(*rr.comp));
 688     rr.comp->which = Z_RecordComp_complex;
 689     rr.comp->u.complex = (Z_CompSpec *)
 690             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 691     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 692         odr_malloc(assoc->encode, sizeof(bool_t));
 693     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 694     rr.comp->u.complex->num_dbSpecific = 0;
 695     rr.comp->u.complex->dbSpecific = 0;
 696     rr.comp->u.complex->num_recordSyntax = 0;
 697     rr.comp->u.complex->recordSyntax = 0;
 698
 699     rr.comp->u.complex->generic = (Z_Specification *)
 700             odr_malloc(assoc->decode, sizeof(Z_Specification));
 701
 702     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 703     rr.comp->u.complex->generic->which = Z_Schema_uri;
 704     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 705
 706     /* ESN = recordSchema if recordSchema is present */
 707     rr.comp->u.complex->generic->elementSpec = 0;
 708     if (srw_req->recordSchema)
 709     {
 710         rr.comp->u.complex->generic->elementSpec =
 711             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 712         rr.comp->u.complex->generic->elementSpec->which =
 713             Z_ElementSpec_elementSetName;
 714         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 715             srw_req->recordSchema;
 716     }
 717
 718     rr.stream = assoc->encode;
 719     rr.print = assoc->print;
 720
 721     rr.basename = 0;
 722     rr.len = 0;
 723     rr.record = 0;
 724     rr.last_in_set = 0;
 725     rr.errcode = 0;
 726     rr.errstring = 0;
 727     rr.surrogate_flag = 0;
 728     rr.schema = srw_req->recordSchema;
 729
 730     if (!assoc->init->bend_fetch)
 731         return 1;
 732
 733     retrieve_fetch(assoc, &rr);
 734
 735     if (rr.errcode && rr.surrogate_flag)
 736     {
 737         int code = yaz_diag_bib1_to_srw(rr.errcode);
 738         yaz_mk_sru_surrogate(o, record, pos, code, rr.errstring);
 739         return 0;
 740     }
 741     else if (rr.len >= 0)
 742     {
 743         record->recordData_buf = rr.record;
 744         record->recordData_len = rr.len;
 745         record->recordPosition = odr_intdup(o, pos);
 746         record->recordSchema = odr_strdup_null(
 747             o, rr.schema ? rr.schema : srw_req->recordSchema);
 748     }
 749     if (rr.errcode)
 750     {
 751         *addinfo = rr.errstring;
 752         return rr.errcode;
 753     }
 754     return 0;
 755 }
 756
 757 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 758                    Z_Query *query_result)
 759 {
 760     /* have a CQL query and  CQL to PQF transform .. */
 761     CQL_parser cp = cql_parser_create();
 762     int r;
 763     int srw_errcode = 0;
 764     const char *add = 0;
 765     char rpn_buf[5120];
 766
 767     r = cql_parser_string(cp, cql);
 768     if (r)
 769     {
 770         srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 771     }
 772     if (!r)
 773     {
 774         /* Syntax OK */
 775         r = cql_transform_buf(ct,
 776                               cql_parser_result(cp),
 777                               rpn_buf, sizeof(rpn_buf)-1);
 778         if (r)
 779             srw_errcode = cql_transform_error(ct, &add);
 780     }
 781     if (!r)
 782     {
 783         /* Syntax & transform OK. */
 784         /* Convert PQF string to Z39.50 to RPN query struct */
 785         YAZ_PQF_Parser pp = yaz_pqf_create();
 786         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 787         if (!rpnquery)
 788         {
 789             size_t off;
 790             const char *pqf_msg;
 791             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 792             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 793                     pqf_msg, code);
 794             srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 795         }
 796         else
 797         {
 798             query_result->which = Z_Query_type_1;
 799             query_result->u.type_1 = rpnquery;
 800         }
 801         yaz_pqf_destroy(pp);
 802     }
 803     cql_parser_destroy(cp);
 804     return srw_errcode;
 805 }
 806
 807 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 808                         Z_AttributesPlusTerm *result)
 809 {
 810     Z_Query query;
 811     Z_RPNQuery *rpn;
 812     int srw_error = cql2pqf(odr, cql, ct, &query);
 813     if (srw_error)
 814         return srw_error;
 815     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 816         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* bad query type */
 817     rpn = query.u.type_1;
 818     if (!rpn->RPNStructure)
 819         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be structure */
 820     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 821         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be simple */
 822     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 823         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be be attributes + term */
 824     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 825            sizeof(*result));
 826     return 0;
 827 }
 828
 829
 830 static int ccl2pqf(ODR odr, const Odr_oct *ccl, CCL_bibset bibset,
 831                    bend_search_rr *bsrr)
 832 {
 833     char *ccl0;
 834     struct ccl_rpn_node *node;
 835     int errcode, pos;
 836
 837     ccl0 = odr_strdupn(odr, (char*) ccl->buf, ccl->len);
 838     if ((node = ccl_find_str(bibset, ccl0, &errcode, &pos)) == 0)
 839     {
 840         bsrr->errstring = (char*) ccl_err_msg(errcode);
 841         return YAZ_SRW_QUERY_SYNTAX_ERROR;    /* Query syntax error */
 842     }
 843
 844     bsrr->query->which = Z_Query_type_1;
 845     bsrr->query->u.type_1 = ccl_rpn_query(odr, node);
 846     return 0;
 847 }
 848
 849 static void srw_bend_search(association *assoc, request *req,
 850                             Z_SRW_PDU *sr,
 851                             Z_SRW_PDU *res,
 852                             int *http_code)
 853 {
 854     Z_SRW_searchRetrieveResponse *srw_res = res->u.response;
 855     int srw_error = 0;
 856     Z_External *ext;
 857     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 858
 859     *http_code = 200;
 860     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 861     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 862     if (srw_res->num_diagnostics == 0 && assoc->init)
 863     {
 864         bend_search_rr rr;
 865         rr.setname = "default";
 866         rr.replace_set = 1;
 867         rr.num_bases = 1;
 868         rr.basenames = &srw_req->database;
 869         rr.referenceId = 0;
 870         rr.srw_sortKeys = 0;
 871         rr.srw_setname = 0;
 872         rr.srw_setnameIdleTime = 0;
 873         rr.estimated_hit_count = 0;
 874         rr.partial_resultset = 0;
 875         rr.query = (Z_Query *) odr_malloc(assoc->decode, sizeof(*rr.query));
 876         rr.query->u.type_1 = 0;
 877         rr.extra_args = sr->extra_args;
 878         rr.extra_response_data = 0;
 879
 880         if (srw_req->query_type == Z_SRW_query_type_cql)
 881         {
 882             if (assoc->server && assoc->server->cql_transform)
 883             {
 884                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 885                                           assoc->server->cql_transform,
 886                                           rr.query);
 887                 if (srw_errcode)
 888                 {
 889                     yaz_add_srw_diagnostic(assoc->encode,
 890                                            &srw_res->diagnostics,
 891                                            &srw_res->num_diagnostics,
 892                                            srw_errcode, 0);
 893                 }
 894             }
 895             else
 896             {
 897                 /* CQL query to backend. Wrap it - Z39.50 style */
 898                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 899                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 900                                                         "1.2.840.10003.16.2");
 901                 ext->indirect_reference = 0;
 902                 ext->descriptor = 0;
 903                 ext->which = Z_External_CQL;
 904                 ext->u.cql = srw_req->query.cql;
 905
 906                 rr.query->which = Z_Query_type_104;
 907                 rr.query->u.type_104 =  ext;
 908             }
 909         }
 910         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 911         {
 912             Z_RPNQuery *RPNquery;
 913             YAZ_PQF_Parser pqf_parser;
 914
 915             pqf_parser = yaz_pqf_create();
 916
 917             RPNquery = yaz_pqf_parse(pqf_parser, assoc->decode,
 918                                      srw_req->query.pqf);
 919             if (!RPNquery)
 920             {
 921                 const char *pqf_msg;
 922                 size_t off;
 923                 int code = yaz_pqf_error(pqf_parser, &pqf_msg, &off);
 924                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 925                         code, pqf_msg, (long) off);
 926                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 927             }
 928
 929             rr.query->which = Z_Query_type_1;
 930             rr.query->u.type_1 =  RPNquery;
 931
 932             yaz_pqf_destroy(pqf_parser);
 933         }
 934         else
 935         {
 936             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 937                                    &srw_res->num_diagnostics,
 938                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 939         }
 940         if (rr.query->u.type_1)
 941         {
 942             rr.stream = assoc->encode;
 943             rr.decode = assoc->decode;
 944             rr.print = assoc->print;
 945             if ( srw_req->sort.sortKeys )
 946                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 947                                              srw_req->sort.sortKeys );
 948             rr.association = assoc;
 949             rr.hits = 0;
 950             rr.errcode = 0;
 951             rr.errstring = 0;
 952             rr.search_info = 0;
 953             yaz_log_zquery_level(log_requestdetail,rr.query);
 954
 955             (assoc->init->bend_search)(assoc->backend, &rr);
 956             if (rr.errcode)
 957             {
 958                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 959                 {
 960                     *http_code = 404;
 961                 }
 962                 else
 963                 {
 964                     srw_error = yaz_diag_bib1_to_srw(rr.errcode);
 965                     yaz_add_srw_diagnostic(assoc->encode,
 966                                            &srw_res->diagnostics,
 967                                            &srw_res->num_diagnostics,
 968                                            srw_error, rr.errstring);
 969                 }
 970             }
 971             else
 972             {
 973                 int number = srw_req->maximumRecords ?
 974                     odr_int_to_int(*srw_req->maximumRecords) : 0;
 975                 int start = srw_req->startRecord ?
 976                     odr_int_to_int(*srw_req->startRecord) : 1;
 977
 978                 yaz_log(log_requestdetail, "Request to pack %d+%d out of "
 979                         ODR_INT_PRINTF,
 980                         start, number, rr.hits);
 981
 982                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 983                 if (rr.srw_setname)
 984                 {
 985                     srw_res->resultSetId =
 986                         odr_strdup(assoc->encode, rr.srw_setname );
 987                     srw_res->resultSetIdleTime =
 988                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
 989                 }
 990
 991                 if (start > rr.hits || start < 1)
 992                 {
 993                     /* if hits<=0 and start=1 we don't return a diagnostic */
 994                     if (start != 1)
 995                         yaz_add_srw_diagnostic(
 996                             assoc->encode,
 997                             &srw_res->diagnostics, &srw_res->num_diagnostics,
 998                             YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
 999                 }
1000                 else if (number > 0)
1001                 {
1002                     int i;
1003                     int ok = 1;
1004                     if (start + number > rr.hits)
1005                         number = odr_int_to_int(rr.hits) - start + 1;
1006
1007                     /* Call bend_present if defined */
1008                     if (assoc->init->bend_present)
1009                     {
1010                         bend_present_rr *bprr = (bend_present_rr*)
1011                             odr_malloc(assoc->decode, sizeof(*bprr));
1012                         bprr->setname = "default";
1013                         bprr->start = start;
1014                         bprr->number = number;
1015                         if (srw_req->recordSchema)
1016                         {
1017                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1018                                                                             sizeof(*bprr->comp));
1019                             bprr->comp->which = Z_RecordComp_simple;
1020                             bprr->comp->u.simple = (Z_ElementSetNames *)
1021                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1022                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1023                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1024                         }
1025                         else
1026                         {
1027                             bprr->comp = 0;
1028                         }
1029                         bprr->stream = assoc->encode;
1030                         bprr->referenceId = 0;
1031                         bprr->print = assoc->print;
1032                         bprr->association = assoc;
1033                         bprr->errcode = 0;
1034                         bprr->errstring = NULL;
1035                         (*assoc->init->bend_present)(assoc->backend, bprr);
1036
1037                         if (bprr->errcode)
1038                         {
1039                             srw_error = yaz_diag_bib1_to_srw(bprr->errcode);
1040                             yaz_add_srw_diagnostic(assoc->encode,
1041                                                    &srw_res->diagnostics,
1042                                                    &srw_res->num_diagnostics,
1043                                                    srw_error, bprr->errstring);
1044                             ok = 0;
1045                         }
1046                     }
1047
1048                     if (ok)
1049                     {
1050                         int j = 0;
1051                         int packing = Z_SRW_recordPacking_string;
1052                         if (srw_req->recordPacking)
1053                         {
1054                             packing =
1055                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1056                             if (packing == -1)
1057                                 packing = Z_SRW_recordPacking_string;
1058                         }
1059                         srw_res->records = (Z_SRW_record *)
1060                             odr_malloc(assoc->encode,
1061                                        number * sizeof(*srw_res->records));
1062
1063                         srw_res->extra_records = (Z_SRW_extra_record **)
1064                             odr_malloc(assoc->encode,
1065                                        number*sizeof(*srw_res->extra_records));
1066
1067                         for (i = 0; i<number; i++)
1068                         {
1069                             int errcode;
1070                             const char *addinfo = 0;
1071
1072                             srw_res->records[j].recordPacking = packing;
1073                             srw_res->records[j].recordData_buf = 0;
1074                             srw_res->extra_records[j] = 0;
1075                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1076                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1077                                                      srw_res->records + j,
1078                                                      &addinfo);
1079                             if (errcode)
1080                             {
1081                                 yaz_add_srw_diagnostic(assoc->encode,
1082                                                        &srw_res->diagnostics,
1083                                                        &srw_res->num_diagnostics,
1084                                                        yaz_diag_bib1_to_srw(errcode),
1085                                                        addinfo);
1086
1087                                 break;
1088                             }
1089                             if (srw_res->records[j].recordData_buf)
1090                                 j++;
1091                         }
1092                         srw_res->num_records = j;
1093                         if (!j)
1094                             srw_res->records = 0;
1095                     }
1096                 }
1097                 if (rr.extra_response_data)
1098                 {
1099                     res->extraResponseData_buf = rr.extra_response_data;
1100                     res->extraResponseData_len = strlen(rr.extra_response_data);
1101                 }
1102                 if (rr.estimated_hit_count || rr.partial_resultset)
1103                 {
1104                     yaz_add_srw_diagnostic(
1105                         assoc->encode,
1106                         &srw_res->diagnostics,
1107                         &srw_res->num_diagnostics,
1108                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1109                         0);
1110                 }
1111             }
1112         }
1113     }
1114     if (log_request)
1115     {
1116         const char *querystr = "?";
1117         const char *querytype = "?";
1118         WRBUF wr = wrbuf_alloc();
1119
1120         switch (srw_req->query_type)
1121         {
1122         case Z_SRW_query_type_cql:
1123             querytype = "CQL";
1124             querystr = srw_req->query.cql;
1125             break;
1126         case Z_SRW_query_type_pqf:
1127             querytype = "PQF";
1128             querystr = srw_req->query.pqf;
1129             break;
1130         }
1131         wrbuf_printf(wr, "SRWSearch %s ", srw_req->database);
1132         if (srw_res->num_diagnostics)
1133             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1134         else if (*http_code != 200)
1135             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1136         else if (srw_res->numberOfRecords)
1137         {
1138             wrbuf_printf(wr, "OK " ODR_INT_PRINTF,
1139                          (srw_res->numberOfRecords ?
1140                           *srw_res->numberOfRecords : 0));
1141         }
1142         wrbuf_printf(wr, " %s " ODR_INT_PRINTF " +%d",
1143                      (srw_res->resultSetId ?
1144                       srw_res->resultSetId : "-"),
1145                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1146                      srw_res->num_records);
1147         yaz_log(log_request, "%s %s: %s", wrbuf_cstr(wr), querytype, querystr);
1148         wrbuf_destroy(wr);
1149     }
1150 }
1151
1152 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1153 {
1154 #if YAZ_HAVE_XML2
1155     xmlNodePtr ptr = (xmlNode *) rr->server_node_ptr;
1156     if (!ptr)
1157         return 0;
1158     for (ptr = ptr->children; ptr; ptr = ptr->next)
1159     {
1160         if (ptr->type != XML_ELEMENT_NODE)
1161             continue;
1162         if (!strcmp((const char *) ptr->name, "explain"))
1163         {
1164             int len;
1165             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1166             xmlChar *buf_out;
1167             char *content;
1168
1169             ptr = xmlCopyNode(ptr, 1);
1170
1171             xmlDocSetRootElement(doc, ptr);
1172
1173             xmlDocDumpMemory(doc, &buf_out, &len);
1174             content = (char*) odr_malloc(rr->stream, 1+len);
1175             memcpy(content, buf_out, len);
1176             content[len] = '\0';
1177
1178             xmlFree(buf_out);
1179             xmlFreeDoc(doc);
1180             rr->explain_buf = content;
1181             return 0;
1182         }
1183     }
1184 #endif
1185     return 0;
1186 }
1187
1188 static void srw_bend_explain(association *assoc, request *req,
1189                              Z_SRW_PDU *sr,
1190                              Z_SRW_explainResponse *srw_res,
1191                              int *http_code)
1192 {
1193     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1194     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1195     *http_code = 404;
1196     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1197     if (assoc->init)
1198     {
1199         bend_explain_rr rr;
1200
1201         rr.stream = assoc->encode;
1202         rr.decode = assoc->decode;
1203         rr.print = assoc->print;
1204         rr.explain_buf = 0;
1205         rr.database = srw_req->database;
1206         if (assoc->server)
1207             rr.server_node_ptr = assoc->server->server_node_ptr;
1208         else
1209             rr.server_node_ptr = 0;
1210         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1211         if (assoc->init->bend_explain)
1212             (*assoc->init->bend_explain)(assoc->backend, &rr);
1213         else
1214             srw_bend_explain_default(assoc->backend, &rr);
1215
1216         if (rr.explain_buf)
1217         {
1218             int packing = Z_SRW_recordPacking_string;
1219             if (srw_req->recordPacking)
1220             {
1221                 packing =
1222                     yaz_srw_str_to_pack(srw_req->recordPacking);
1223                 if (packing == -1)
1224                     packing = Z_SRW_recordPacking_string;
1225             }
1226             srw_res->record.recordSchema = rr.schema;
1227             srw_res->record.recordPacking = packing;
1228             srw_res->record.recordData_buf = rr.explain_buf;
1229             srw_res->record.recordData_len = strlen(rr.explain_buf);
1230             srw_res->record.recordPosition = 0;
1231             *http_code = 200;
1232         }
1233     }
1234 }
1235
1236 static void srw_bend_scan(association *assoc, request *req,
1237                           Z_SRW_PDU *sr,
1238                           Z_SRW_scanResponse *srw_res,
1239                           int *http_code)
1240 {
1241     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1242     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1243
1244     *http_code = 200;
1245     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1246     if (srw_res->num_diagnostics == 0 && assoc->init)
1247     {
1248         int step_size = 0;
1249         struct scan_entry *save_entries;
1250
1251         bend_scan_rr *bsrr = (bend_scan_rr *)
1252             odr_malloc(assoc->encode, sizeof(*bsrr));
1253         bsrr->num_bases = 1;
1254         bsrr->basenames = &srw_req->database;
1255
1256         bsrr->num_entries = srw_req->maximumTerms ?
1257             odr_int_to_int(*srw_req->maximumTerms) : 10;
1258         bsrr->term_position = srw_req->responsePosition ?
1259             odr_int_to_int(*srw_req->responsePosition) : 1;
1260
1261         bsrr->errcode = 0;
1262         bsrr->errstring = 0;
1263         bsrr->referenceId = 0;
1264         bsrr->stream = assoc->encode;
1265         bsrr->print = assoc->print;
1266         bsrr->step_size = &step_size;
1267         bsrr->entries = 0;
1268         bsrr->setname = 0;
1269
1270         if (bsrr->num_entries > 0)
1271         {
1272             int i;
1273             bsrr->entries = (struct scan_entry *)
1274                 odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1275                            bsrr->num_entries);
1276             for (i = 0; i<bsrr->num_entries; i++)
1277             {
1278                 bsrr->entries[i].term = 0;
1279                 bsrr->entries[i].occurrences = 0;
1280                 bsrr->entries[i].errcode = 0;
1281                 bsrr->entries[i].errstring = 0;
1282                 bsrr->entries[i].display_term = 0;
1283             }
1284         }
1285         save_entries = bsrr->entries;  /* save it so we can compare later */
1286
1287         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1288             assoc->init->bend_scan)
1289         {
1290             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1291
1292             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1293                                       &bsrr->attributeset,
1294                                       srw_req->scanClause.pqf);
1295             yaz_pqf_destroy(pqf_parser);
1296             bsrr->scanClause = 0;
1297             ((int (*)(void *, bend_scan_rr *))
1298              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1299         }
1300         else if (srw_req->query_type == Z_SRW_query_type_cql
1301                  && assoc->init->bend_scan && assoc->server
1302                  && assoc->server->cql_transform)
1303         {
1304             int srw_error;
1305             bsrr->scanClause = 0;
1306             bsrr->attributeset = 0;
1307             bsrr->term = (Z_AttributesPlusTerm *)
1308                 odr_malloc(assoc->decode, sizeof(*bsrr->term));
1309             srw_error = cql2pqf_scan(assoc->encode,
1310                                      srw_req->scanClause.cql,
1311                                      assoc->server->cql_transform,
1312                                      bsrr->term);
1313             if (srw_error)
1314                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1315                                        &srw_res->num_diagnostics,
1316                                        srw_error, 0);
1317             else
1318             {
1319                 ((int (*)(void *, bend_scan_rr *))
1320                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1321             }
1322         }
1323         else if (srw_req->query_type == Z_SRW_query_type_cql
1324                  && assoc->init->bend_srw_scan)
1325         {
1326             bsrr->term = 0;
1327             bsrr->attributeset = 0;
1328             bsrr->scanClause = srw_req->scanClause.cql;
1329             ((int (*)(void *, bend_scan_rr *))
1330              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1331         }
1332         else
1333         {
1334             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1335                                    &srw_res->num_diagnostics,
1336                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1337         }
1338         if (bsrr->errcode)
1339         {
1340             int srw_error;
1341             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1342             {
1343                 *http_code = 404;
1344                 return;
1345             }
1346             srw_error = yaz_diag_bib1_to_srw(bsrr->errcode);
1347
1348             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1349                                    &srw_res->num_diagnostics,
1350                                    srw_error, bsrr->errstring);
1351         }
1352         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1353         {
1354             int i;
1355             srw_res->terms = (Z_SRW_scanTerm*)
1356                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1357                            bsrr->num_entries);
1358
1359             srw_res->num_terms =  bsrr->num_entries;
1360             for (i = 0; i<bsrr->num_entries; i++)
1361             {
1362                 Z_SRW_scanTerm *t = srw_res->terms + i;
1363                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1364                 t->numberOfRecords =
1365                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1366                 t->displayTerm = 0;
1367                 if (save_entries == bsrr->entries &&
1368                     bsrr->entries[i].display_term)
1369                 {
1370                     /* the entries was _not_ set by the handler. So it's
1371                        safe to test for new member display_term. It is
1372                        NULL'ed by us.
1373                     */
1374                     t->displayTerm = odr_strdup(assoc->encode,
1375                                                 bsrr->entries[i].display_term);
1376                 }
1377                 t->whereInList = 0;
1378             }
1379         }
1380     }
1381     if (log_request)
1382     {
1383         WRBUF wr = wrbuf_alloc();
1384         const char *querytype = 0;
1385         const char *querystr = 0;
1386
1387         switch(srw_req->query_type)
1388         {
1389         case Z_SRW_query_type_pqf:
1390             querytype = "PQF";
1391             querystr = srw_req->scanClause.pqf;
1392             break;
1393         case Z_SRW_query_type_cql:
1394             querytype = "CQL";
1395             querystr = srw_req->scanClause.cql;
1396             break;
1397         default:
1398             querytype = "UNKNOWN";
1399             querystr = "";
1400         }
1401
1402         wrbuf_printf(wr, "SRWScan %s ", srw_req->database);
1403
1404         if (srw_res->num_diagnostics)
1405             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1406         else if (srw_res->num_terms)
1407             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1408         else
1409             wrbuf_printf(wr, "OK - - ");
1410
1411         wrbuf_printf(wr, ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
1412                      (srw_req->responsePosition ?
1413                       *srw_req->responsePosition : 1),
1414                      (srw_req->maximumTerms ?
1415                       *srw_req->maximumTerms : 1));
1416         /* there is no step size in SRU/W ??? */
1417         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1418         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1419         wrbuf_destroy(wr);
1420     }
1421
1422 }
1423
1424 static void srw_bend_update(association *assoc, request *req,
1425                             Z_SRW_PDU *sr,
1426                             Z_SRW_updateResponse *srw_res,
1427                             int *http_code)
1428 {
1429     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1430     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1431     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1432     *http_code = 404;
1433     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1434     if (assoc->init)
1435     {
1436         bend_update_rr rr;
1437         Z_SRW_extra_record *extra = srw_req->extra_record;
1438
1439         rr.stream = assoc->encode;
1440         rr.print = assoc->print;
1441         rr.num_bases = 1;
1442         rr.basenames = &srw_req->database;
1443         rr.operation = srw_req->operation;
1444         rr.operation_status = "failed";
1445         rr.record_id = 0;
1446         rr.record_versions = 0;
1447         rr.num_versions = 0;
1448         rr.record_packing = "string";
1449         rr.record_schema = 0;
1450         rr.record_data = 0;
1451         rr.extra_record_data = 0;
1452         rr.extra_request_data = 0;
1453         rr.extra_response_data = 0;
1454         rr.uri = 0;
1455         rr.message = 0;
1456         rr.details = 0;
1457
1458         *http_code = 200;
1459         if (rr.operation == 0)
1460         {
1461             yaz_add_sru_update_diagnostic(
1462                 assoc->encode, &srw_res->diagnostics,
1463                 &srw_res->num_diagnostics,
1464                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1465                 "action" );
1466             return;
1467         }
1468         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1469         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1470         if (!strcmp( rr.operation, "delete"))
1471         {
1472             if (srw_req->record && !srw_req->record->recordSchema)
1473             {
1474                 rr.record_schema = odr_strdup(
1475                     assoc->encode,
1476                     srw_req->record->recordSchema);
1477             }
1478             if (srw_req->record)
1479             {
1480                 rr.record_data = odr_strdupn(
1481                     assoc->encode,
1482                     srw_req->record->recordData_buf,
1483                     srw_req->record->recordData_len );
1484             }
1485             if (extra && extra->extraRecordData_len)
1486             {
1487                 rr.extra_record_data = odr_strdupn(
1488                     assoc->encode,
1489                     extra->extraRecordData_buf,
1490                     extra->extraRecordData_len );
1491             }
1492             if (srw_req->recordId)
1493                 rr.record_id = srw_req->recordId;
1494             else if (extra && extra->recordIdentifier)
1495                 rr.record_id = extra->recordIdentifier;
1496         }
1497         else if (!strcmp(rr.operation, "replace"))
1498         {
1499             if (srw_req->recordId)
1500                 rr.record_id = srw_req->recordId;
1501             else if (extra && extra->recordIdentifier)
1502                 rr.record_id = extra->recordIdentifier;
1503             else
1504             {
1505                 yaz_add_sru_update_diagnostic(
1506                     assoc->encode, &srw_res->diagnostics,
1507                     &srw_res->num_diagnostics,
1508                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1509                     "recordIdentifier");
1510             }
1511             if (!srw_req->record)
1512             {
1513                 yaz_add_sru_update_diagnostic(
1514                     assoc->encode, &srw_res->diagnostics,
1515                     &srw_res->num_diagnostics,
1516                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1517                     "record");
1518             }
1519             else
1520             {
1521                 if (srw_req->record->recordSchema)
1522                     rr.record_schema = odr_strdup(
1523                         assoc->encode, srw_req->record->recordSchema);
1524                 if (srw_req->record->recordData_len )
1525                 {
1526                     rr.record_data = odr_strdupn(assoc->encode,
1527                                                  srw_req->record->recordData_buf,
1528                                                  srw_req->record->recordData_len );
1529                 }
1530                 else
1531                 {
1532                     yaz_add_sru_update_diagnostic(
1533                         assoc->encode, &srw_res->diagnostics,
1534                         &srw_res->num_diagnostics,
1535                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1536                         "recordData" );
1537                 }
1538             }
1539             if (extra && extra->extraRecordData_len)
1540             {
1541                 rr.extra_record_data = odr_strdupn(
1542                     assoc->encode,
1543                     extra->extraRecordData_buf,
1544                     extra->extraRecordData_len );
1545             }
1546         }
1547         else if (!strcmp(rr.operation, "insert"))
1548         {
1549             if (srw_req->recordId)
1550                 rr.record_id = srw_req->recordId;
1551             else if (extra)
1552                 rr.record_id = extra->recordIdentifier;
1553
1554             if (srw_req->record)
1555             {
1556                 if (srw_req->record->recordSchema)
1557                     rr.record_schema = odr_strdup(
1558                         assoc->encode, srw_req->record->recordSchema);
1559
1560                 if (srw_req->record->recordData_len)
1561                     rr.record_data = odr_strdupn(
1562                         assoc->encode,
1563                         srw_req->record->recordData_buf,
1564                         srw_req->record->recordData_len );
1565             }
1566             if (extra && extra->extraRecordData_len)
1567             {
1568                 rr.extra_record_data = odr_strdupn(
1569                     assoc->encode,
1570                     extra->extraRecordData_buf,
1571                     extra->extraRecordData_len );
1572             }
1573         }
1574         else
1575             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1576                                           &srw_res->num_diagnostics,
1577                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1578                                           rr.operation );
1579
1580         if (srw_req->record)
1581         {
1582             const char *pack_str =
1583                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1584             if (pack_str)
1585                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1586         }
1587
1588         if (srw_req->num_recordVersions)
1589         {
1590             rr.record_versions = srw_req->recordVersions;
1591             rr.num_versions = srw_req->num_recordVersions;
1592         }
1593         if (srw_req->extraRequestData_len)
1594         {
1595             rr.extra_request_data = odr_strdupn(assoc->encode,
1596                                                 srw_req->extraRequestData_buf,
1597                                                 srw_req->extraRequestData_len );
1598         }
1599         if (srw_res->num_diagnostics == 0)
1600         {
1601             if ( assoc->init->bend_srw_update)
1602                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1603             else
1604                 yaz_add_sru_update_diagnostic(
1605                     assoc->encode, &srw_res->diagnostics,
1606                     &srw_res->num_diagnostics,
1607                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1608                     "No Update backend handler");
1609         }
1610
1611         if (rr.uri)
1612             yaz_add_srw_diagnostic_uri(assoc->encode,
1613                                        &srw_res->diagnostics,
1614                                        &srw_res->num_diagnostics,
1615                                        rr.uri,
1616                                        rr.message,
1617                                        rr.details);
1618         srw_res->recordId = rr.record_id;
1619         srw_res->operationStatus = rr.operation_status;
1620         srw_res->recordVersions = rr.record_versions;
1621         srw_res->num_recordVersions = rr.num_versions;
1622         if (srw_res->extraResponseData_len)
1623         {
1624             srw_res->extraResponseData_buf = rr.extra_response_data;
1625             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1626         }
1627         if (srw_res->num_diagnostics == 0 && rr.record_data)
1628         {
1629             srw_res->record = yaz_srw_get_record(assoc->encode);
1630             srw_res->record->recordSchema = rr.record_schema;
1631             if (rr.record_packing)
1632             {
1633                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1634
1635                 if (pack == -1)
1636                 {
1637                     pack = Z_SRW_recordPacking_string;
1638                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1639                             rr.record_packing);
1640                 }
1641                 srw_res->record->recordPacking = pack;
1642             }
1643             srw_res->record->recordData_buf = rr.record_data;
1644             srw_res->record->recordData_len = strlen(rr.record_data);
1645             if (rr.extra_record_data)
1646             {
1647                 Z_SRW_extra_record *ex =
1648                     yaz_srw_get_extra_record(assoc->encode);
1649                 srw_res->extra_record = ex;
1650                 ex->extraRecordData_buf = rr.extra_record_data;
1651                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1652             }
1653         }
1654     }
1655 }
1656
1657 /* check if path is OK (1); BAD (0) */
1658 static int check_path(const char *path)
1659 {
1660     if (*path != '/')
1661         return 0;
1662     if (strstr(path, ".."))
1663         return 0;
1664     return 1;
1665 }
1666
1667 static char *read_file(const char *fname, ODR o, size_t *sz)
1668 {
1669     char *buf;
1670     FILE *inf = fopen(fname, "rb");
1671     if (!inf)
1672         return 0;
1673
1674     fseek(inf, 0L, SEEK_END);
1675     *sz = ftell(inf);
1676     rewind(inf);
1677     buf = (char *) odr_malloc(o, *sz);
1678     if (fread(buf, 1, *sz, inf) != *sz)
1679         yaz_log(YLOG_WARN|YLOG_ERRNO, "short read %s", fname);
1680     fclose(inf);
1681     return buf;
1682 }
1683
1684 static void process_http_request(association *assoc, request *req)
1685 {
1686     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1687     ODR o = assoc->encode;
1688     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1689     Z_SRW_PDU *sr = 0;
1690     Z_SOAP *soap_package = 0;
1691     Z_GDU *p = 0;
1692     char *charset = 0;
1693     Z_HTTP_Response *hres = 0;
1694     int keepalive = 1;
1695     const char *stylesheet = 0; /* for now .. set later */
1696     Z_SRW_diagnostic *diagnostic = 0;
1697     int num_diagnostic = 0;
1698     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1699
1700     yaz_log(log_request, "%s %s HTTP/%s", hreq->method, hreq->path, hreq->version);
1701     if (!control_association(assoc, host, 0))
1702     {
1703         p = z_get_HTTP_Response(o, 404);
1704         r = 1;
1705     }
1706     if (r == 2 && assoc->server && assoc->server->docpath
1707         && hreq->path[0] == '/'
1708         &&
1709         /* check if path is a proper prefix of documentroot */
1710         strncmp(hreq->path+1, assoc->server->docpath,
1711                 strlen(assoc->server->docpath))
1712         == 0)
1713     {
1714         if (!check_path(hreq->path))
1715         {
1716             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1717             p = z_get_HTTP_Response(o, 404);
1718         }
1719         else
1720         {
1721             size_t content_size = 0;
1722             char *content_buf = read_file(hreq->path+1, o, &content_size);
1723             if (!content_buf)
1724             {
1725                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1726                 p = z_get_HTTP_Response(o, 404);
1727             }
1728             else
1729             {
1730                 const char *ctype = 0;
1731                 yaz_mime_types types = yaz_mime_types_create();
1732
1733                 yaz_mime_types_add(types, "xsl", "application/xml");
1734                 yaz_mime_types_add(types, "xml", "application/xml");
1735                 yaz_mime_types_add(types, "css", "text/css");
1736                 yaz_mime_types_add(types, "html", "text/html");
1737                 yaz_mime_types_add(types, "htm", "text/html");
1738                 yaz_mime_types_add(types, "txt", "text/plain");
1739                 yaz_mime_types_add(types, "js", "application/x-javascript");
1740
1741                 yaz_mime_types_add(types, "gif", "image/gif");
1742                 yaz_mime_types_add(types, "png", "image/png");
1743                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1744                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1745
1746                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1747                 if (!ctype)
1748                 {
1749                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1750                     p = z_get_HTTP_Response(o, 404);
1751                 }
1752                 else
1753                 {
1754                     p = z_get_HTTP_Response(o, 200);
1755                     hres = p->u.HTTP_Response;
1756                     hres->content_buf = content_buf;
1757                     hres->content_len = content_size;
1758                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1759                 }
1760                 yaz_mime_types_destroy(types);
1761             }
1762         }
1763         r = 1;
1764     }
1765
1766     if (r == 2)
1767     {
1768         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1769         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1770     }
1771     if (r == 2)  /* not taken */
1772     {
1773         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1774                            &diagnostic, &num_diagnostic);
1775         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1776     }
1777     if (r == 0)  /* decode SRW/SRU OK .. */
1778     {
1779         int http_code = 200;
1780         if (sr->which == Z_SRW_searchRetrieve_request)
1781         {
1782             Z_SRW_PDU *res =
1783                 yaz_srw_get_pdu(assoc->encode, Z_SRW_searchRetrieve_response,
1784                                 sr->srw_version);
1785             stylesheet = sr->u.request->stylesheet;
1786             if (num_diagnostic)
1787             {
1788                 res->u.response->diagnostics = diagnostic;
1789                 res->u.response->num_diagnostics = num_diagnostic;
1790             }
1791             else
1792             {
1793                 srw_bend_search(assoc, req, sr, res, &http_code);
1794             }
1795             if (http_code == 200)
1796                 soap_package->u.generic->p = res;
1797         }
1798         else if (sr->which == Z_SRW_explain_request)
1799         {
1800             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_explain_response,
1801                                              sr->srw_version);
1802             stylesheet = sr->u.explain_request->stylesheet;
1803             if (num_diagnostic)
1804             {
1805                 res->u.explain_response->diagnostics = diagnostic;
1806                 res->u.explain_response->num_diagnostics = num_diagnostic;
1807             }
1808             srw_bend_explain(assoc, req, sr,
1809                              res->u.explain_response, &http_code);
1810             if (http_code == 200)
1811                 soap_package->u.generic->p = res;
1812         }
1813         else if (sr->which == Z_SRW_scan_request)
1814         {
1815             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_scan_response,
1816                                              sr->srw_version);
1817             stylesheet = sr->u.scan_request->stylesheet;
1818             if (num_diagnostic)
1819             {
1820                 res->u.scan_response->diagnostics = diagnostic;
1821                 res->u.scan_response->num_diagnostics = num_diagnostic;
1822             }
1823             srw_bend_scan(assoc, req, sr,
1824                           res->u.scan_response, &http_code);
1825             if (http_code == 200)
1826                 soap_package->u.generic->p = res;
1827         }
1828         else if (sr->which == Z_SRW_update_request)
1829         {
1830             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_update_response,
1831                                              sr->srw_version);
1832             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1833             if (num_diagnostic)
1834             {
1835                 res->u.update_response->diagnostics = diagnostic;
1836                 res->u.update_response->num_diagnostics = num_diagnostic;
1837             }
1838             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1839             srw_bend_update(assoc, req, sr,
1840                             res->u.update_response, &http_code);
1841             if (http_code == 200)
1842                 soap_package->u.generic->p = res;
1843         }
1844         else
1845         {
1846             yaz_log(log_request, "SOAP ERROR");
1847             /* FIXME - what error, what query */
1848             http_code = 500;
1849             z_soap_error(assoc->encode, soap_package,
1850                          "SOAP-ENV:Client", "Bad method", 0);
1851         }
1852         if (http_code == 200 || http_code == 500)
1853         {
1854             static Z_SOAP_Handler soap_handlers[4] = {
1855 #if YAZ_HAVE_XML2
1856                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1857                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1858                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1859 #endif
1860                 {0, 0, 0}
1861             };
1862             char ctype[80];
1863             int ret;
1864             p = z_get_HTTP_Response(o, 200);
1865             hres = p->u.HTTP_Response;
1866
1867             if (!stylesheet && assoc->server)
1868                 stylesheet = assoc->server->stylesheet;
1869
1870             /* empty stylesheet means NO stylesheet */
1871             if (stylesheet && *stylesheet == '\0')
1872                 stylesheet = 0;
1873
1874             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1875                                        &hres->content_buf, &hres->content_len,
1876                                        soap_handlers, charset, stylesheet);
1877             hres->code = http_code;
1878
1879             strcpy(ctype, "text/xml");
1880             if (charset && strlen(charset) < sizeof(ctype)-30)
1881             {
1882                 strcat(ctype, "; charset=");
1883                 strcat(ctype, charset);
1884             }
1885             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1886         }
1887         else
1888             p = z_get_HTTP_Response(o, http_code);
1889     }
1890
1891     if (p == 0)
1892         p = z_get_HTTP_Response(o, 500);
1893     hres = p->u.HTTP_Response;
1894     if (!strcmp(hreq->version, "1.0"))
1895     {
1896         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1897         if (v && !strcmp(v, "Keep-Alive"))
1898             keepalive = 1;
1899         else
1900             keepalive = 0;
1901         hres->version = "1.0";
1902     }
1903     else
1904     {
1905         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1906         if (v && !strcmp(v, "close"))
1907             keepalive = 0;
1908         else
1909             keepalive = 1;
1910         hres->version = "1.1";
1911     }
1912     if (!keepalive)
1913     {
1914         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1915         assoc->state = ASSOC_DEAD;
1916         assoc->cs_get_mask = 0;
1917     }
1918     else
1919     {
1920         int t;
1921         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1922
1923         if (alive && isdigit(*(const unsigned char *) alive))
1924             t = atoi(alive);
1925         else
1926             t = 15;
1927         if (t < 0 || t > 3600)
1928             t = 3600;
1929         iochan_settimeout(assoc->client_chan,t);
1930         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1931     }
1932     process_gdu_response(assoc, req, p);
1933 }
1934
1935 static void process_gdu_request(association *assoc, request *req)
1936 {
1937     if (req->gdu_request->which == Z_GDU_Z3950)
1938     {
1939         char *msg = 0;
1940         req->apdu_request = req->gdu_request->u.z3950;
1941         if (process_z_request(assoc, req, &msg) < 0)
1942             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1943     }
1944     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1945         process_http_request(assoc, req);
1946     else
1947     {
1948         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1949     }
1950 }
1951
1952 /*
1953  * Initiate request processing.
1954  */
1955 static int process_z_request(association *assoc, request *req, char **msg)
1956 {
1957     Z_APDU *res;
1958     int retval;
1959
1960     *msg = "Unknown Error";
1961     assert(req && req->state == REQUEST_IDLE);
1962     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1963     {
1964         *msg = "Missing InitRequest";
1965         return -1;
1966     }
1967     switch (req->apdu_request->which)
1968     {
1969     case Z_APDU_initRequest:
1970         res = process_initRequest(assoc, req); break;
1971     case Z_APDU_searchRequest:
1972         res = process_searchRequest(assoc, req); break;
1973     case Z_APDU_presentRequest:
1974         res = process_presentRequest(assoc, req); break;
1975     case Z_APDU_scanRequest:
1976         if (assoc->init->bend_scan)
1977             res = process_scanRequest(assoc, req);
1978         else
1979         {
1980             *msg = "Cannot handle Scan APDU";
1981             return -1;
1982         }
1983         break;
1984     case Z_APDU_extendedServicesRequest:
1985         if (assoc->init->bend_esrequest)
1986             res = process_ESRequest(assoc, req);
1987         else
1988         {
1989             *msg = "Cannot handle Extended Services APDU";
1990             return -1;
1991         }
1992         break;
1993     case Z_APDU_sortRequest:
1994         if (assoc->init->bend_sort)
1995             res = process_sortRequest(assoc, req);
1996         else
1997         {
1998             *msg = "Cannot handle Sort APDU";
1999             return -1;
2000         }
2001         break;
2002     case Z_APDU_close:
2003         process_close(assoc, req);
2004         return 0;
2005     case Z_APDU_deleteResultSetRequest:
2006         if (assoc->init->bend_delete)
2007             res = process_deleteRequest(assoc, req);
2008         else
2009         {
2010             *msg = "Cannot handle Delete APDU";
2011             return -1;
2012         }
2013         break;
2014     case Z_APDU_segmentRequest:
2015         if (assoc->init->bend_segment)
2016         {
2017             res = process_segmentRequest(assoc, req);
2018         }
2019         else
2020         {
2021             *msg = "Cannot handle Segment APDU";
2022             return -1;
2023         }
2024         break;
2025     case Z_APDU_triggerResourceControlRequest:
2026         return 0;
2027     default:
2028         *msg = "Bad APDU received";
2029         return -1;
2030     }
2031     if (res)
2032     {
2033         yaz_log(YLOG_DEBUG, "  result immediately available");
2034         retval = process_z_response(assoc, req, res);
2035     }
2036     else
2037     {
2038         yaz_log(YLOG_DEBUG, "  result unavailble");
2039         retval = -1;
2040     }
2041     return retval;
2042 }
2043
2044 /*
2045  * Encode response, and transfer the request structure to the outgoing queue.
2046  */
2047 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2048 {
2049     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2050
2051     if (assoc->print)
2052     {
2053         if (!z_GDU(assoc->print, &res, 0, 0))
2054             yaz_log(YLOG_WARN, "ODR print error: %s",
2055                 odr_errmsg(odr_geterror(assoc->print)));
2056         odr_reset(assoc->print);
2057     }
2058     if (!z_GDU(assoc->encode, &res, 0, 0))
2059     {
2060         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2061                 odr_errmsg(odr_geterror(assoc->decode)),
2062                 odr_getelement(assoc->decode));
2063         return -1;
2064     }
2065     req->response = odr_getbuf(assoc->encode, &req->len_response,
2066         &req->size_response);
2067     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2068     odr_reset(assoc->encode);
2069     req->state = REQUEST_IDLE;
2070     request_enq(&assoc->outgoing, req);
2071     /* turn the work over to the ir_session handler */
2072     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2073     assoc->cs_put_mask = EVENT_OUTPUT;
2074     /* Is there more work to be done? give that to the input handler too */
2075     for (;;)
2076     {
2077         req = request_head(&assoc->incoming);
2078         if (req && req->state == REQUEST_IDLE)
2079         {
2080             request_deq(&assoc->incoming);
2081             process_gdu_request(assoc, req);
2082         }
2083         else
2084             break;
2085     }
2086     return 0;
2087 }
2088
2089 /*
2090  * Encode response, and transfer the request structure to the outgoing queue.
2091  */
2092 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2093 {
2094     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2095     gres->which = Z_GDU_Z3950;
2096     gres->u.z3950 = res;
2097
2098     return process_gdu_response(assoc, req, gres);
2099 }
2100
2101 static char *get_vhost(Z_OtherInformation *otherInfo)
2102 {
2103     return yaz_oi_get_string_oid(&otherInfo, yaz_oid_userinfo_proxy, 1, 0);
2104 }
2105
2106 /*
2107  * Handle init request.
2108  * At the moment, we don't check the options
2109  * anywhere else in the code - we just try not to do anything that would
2110  * break a naive client. We'll toss 'em into the association block when
2111  * we need them there.
2112  */
2113 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2114 {
2115     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2116     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2117     Z_InitResponse *resp = apdu->u.initResponse;
2118     bend_initresult *binitres;
2119     char options[140];
2120     statserv_options_block *cb = 0;  /* by default no control for backend */
2121
2122     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2123         cb = statserv_getcontrol();  /* got control block for backend */
2124
2125     if (cb && assoc->backend)
2126         (*cb->bend_close)(assoc->backend);
2127
2128     yaz_log(log_requestdetail, "Got initRequest");
2129     if (req->implementationId)
2130         yaz_log(log_requestdetail, "Id:        %s",
2131                 req->implementationId);
2132     if (req->implementationName)
2133         yaz_log(log_requestdetail, "Name:      %s",
2134                 req->implementationName);
2135     if (req->implementationVersion)
2136         yaz_log(log_requestdetail, "Version:   %s",
2137                 req->implementationVersion);
2138
2139     assoc_init_reset(assoc);
2140
2141     assoc->init->auth = req->idAuthentication;
2142     assoc->init->referenceId = req->referenceId;
2143
2144     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2145     {
2146         Z_CharSetandLanguageNegotiation *negotiation =
2147             yaz_get_charneg_record (req->otherInfo);
2148         if (negotiation &&
2149             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2150             assoc->init->charneg_request = negotiation;
2151     }
2152
2153     /* by default named_result_sets is 0 .. Enable it if client asks for it. */
2154     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2155         assoc->init->named_result_sets = 1;
2156
2157     assoc->backend = 0;
2158     if (cb)
2159     {
2160         if (req->implementationVersion)
2161             yaz_log(log_requestdetail, "Config:    %s",
2162                     cb->configname);
2163
2164         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2165
2166         /* we have a backend control block, so call that init function */
2167         if (!(binitres = (*cb->bend_init)(assoc->init)))
2168         {
2169             yaz_log(YLOG_WARN, "Bad response from backend.");
2170             return 0;
2171         }
2172         assoc->backend = binitres->handle;
2173     }
2174     else
2175     {
2176         /* no backend. return error */
2177         binitres = (bend_initresult *)
2178             odr_malloc(assoc->encode, sizeof(*binitres));
2179         binitres->errstring = 0;
2180         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2181         iochan_settimeout(assoc->client_chan, 10);
2182     }
2183     if ((assoc->init->bend_sort))
2184         yaz_log(YLOG_DEBUG, "Sort handler installed");
2185     if ((assoc->init->bend_search))
2186         yaz_log(YLOG_DEBUG, "Search handler installed");
2187     if ((assoc->init->bend_present))
2188         yaz_log(YLOG_DEBUG, "Present handler installed");
2189     if ((assoc->init->bend_esrequest))
2190         yaz_log(YLOG_DEBUG, "ESRequest handler installed");
2191     if ((assoc->init->bend_delete))
2192         yaz_log(YLOG_DEBUG, "Delete handler installed");
2193     if ((assoc->init->bend_scan))
2194         yaz_log(YLOG_DEBUG, "Scan handler installed");
2195     if ((assoc->init->bend_segment))
2196         yaz_log(YLOG_DEBUG, "Segment handler installed");
2197
2198     resp->referenceId = req->referenceId;
2199     *options = '\0';
2200     /* let's tell the client what we can do */
2201     if (ODR_MASK_GET(req->options, Z_Options_search))
2202     {
2203         ODR_MASK_SET(resp->options, Z_Options_search);
2204         strcat(options, "srch");
2205     }
2206     if (ODR_MASK_GET(req->options, Z_Options_present))
2207     {
2208         ODR_MASK_SET(resp->options, Z_Options_present);
2209         strcat(options, " prst");
2210     }
2211     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2212         assoc->init->bend_delete)
2213     {
2214         ODR_MASK_SET(resp->options, Z_Options_delSet);
2215         strcat(options, " del");
2216     }
2217     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2218         assoc->init->bend_esrequest)
2219     {
2220         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2221         strcat(options, " extendedServices");
2222     }
2223     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets)
2224         && assoc->init->named_result_sets)
2225     {
2226         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2227         strcat(options, " namedresults");
2228     }
2229     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2230     {
2231         ODR_MASK_SET(resp->options, Z_Options_scan);
2232         strcat(options, " scan");
2233     }
2234     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2235     {
2236         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2237         strcat(options, " concurrop");
2238     }
2239     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2240     {
2241         ODR_MASK_SET(resp->options, Z_Options_sort);
2242         strcat(options, " sort");
2243     }
2244
2245     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2246     {
2247         Z_OtherInformationUnit *p0;
2248
2249         if (!assoc->init->charneg_response)
2250         {
2251             if (assoc->init->query_charset)
2252             {
2253                 assoc->init->charneg_response = yaz_set_response_charneg(
2254                     assoc->encode, assoc->init->query_charset, 0,
2255                     assoc->init->records_in_same_charset);
2256             }
2257             else
2258             {
2259                 yaz_log(YLOG_WARN, "default query_charset not defined by backend");
2260             }
2261         }
2262         if (assoc->init->charneg_response
2263             && (p0=yaz_oi_update(&resp->otherInfo, assoc->encode, NULL, 0, 0)))
2264         {
2265             p0->which = Z_OtherInfo_externallyDefinedInfo;
2266             p0->information.externallyDefinedInfo =
2267                 assoc->init->charneg_response;
2268             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2269             strcat(options, " negotiation");
2270         }
2271     }
2272     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2273         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2274
2275     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2276     {
2277         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2278         assoc->version = 1; /* 1 & 2 are equivalent */
2279     }
2280     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2281     {
2282         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2283         assoc->version = 2;
2284     }
2285     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2286     {
2287         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2288         assoc->version = 3;
2289     }
2290
2291     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2292
2293     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2294         assoc->maximumRecordSize = odr_int_to_int(*req->maximumRecordSize);
2295
2296     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2297         assoc->preferredMessageSize = odr_int_to_int(*req->preferredMessageSize);
2298
2299     resp->preferredMessageSize =
2300         odr_intdup(assoc->encode, assoc->preferredMessageSize);
2301     resp->maximumRecordSize =
2302         odr_intdup(assoc->encode, assoc->maximumRecordSize);
2303
2304     resp->implementationId = odr_prepend(assoc->encode,
2305                 assoc->init->implementation_id,
2306                 resp->implementationId);
2307
2308     resp->implementationName = odr_prepend(assoc->encode,
2309                 assoc->init->implementation_name,
2310                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2311
2312     if (binitres->errcode)
2313     {
2314         assoc->state = ASSOC_DEAD;
2315         resp->userInformationField =
2316             init_diagnostics(assoc->encode, binitres->errcode,
2317                              binitres->errstring);
2318         *resp->result = 0;
2319     }
2320     else
2321         assoc->state = ASSOC_UP;
2322
2323     if (log_request)
2324     {
2325         if (!req->idAuthentication)
2326             yaz_log(log_request, "Auth none");
2327         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2328         {
2329             const char *open = req->idAuthentication->u.open;
2330             const char *slash = strchr(open, '/');
2331             int len;
2332             if (slash)
2333                 len = slash - open;
2334             else
2335                 len = strlen(open);
2336                 yaz_log(log_request, "Auth open %.*s", len, open);
2337         }
2338         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2339         {
2340             const char *user = req->idAuthentication->u.idPass->userId;
2341             const char *group = req->idAuthentication->u.idPass->groupId;
2342             yaz_log(log_request, "Auth idPass %s %s",
2343                     user ? user : "-", group ? group : "-");
2344         }
2345         else if (req->idAuthentication->which
2346                  == Z_IdAuthentication_anonymous)
2347         {
2348             yaz_log(log_request, "Auth anonymous");
2349         }
2350         else
2351         {
2352             yaz_log(log_request, "Auth other");
2353         }
2354     }
2355     if (log_request)
2356     {
2357         WRBUF wr = wrbuf_alloc();
2358         wrbuf_printf(wr, "Init ");
2359         if (binitres->errcode)
2360             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2361         else
2362             wrbuf_printf(wr, "OK -");
2363         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2364                      (req->implementationId ? req->implementationId :"-"),
2365                      (req->implementationName ?
2366                       req->implementationName : "-"),
2367                      (req->implementationVersion ?
2368                       req->implementationVersion : "-")
2369             );
2370         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2371         wrbuf_destroy(wr);
2372     }
2373     return apdu;
2374 }
2375
2376 /*
2377  * Set the specified `errcode' and `errstring' into a UserInfo-1
2378  * external to be returned to the client in accordance with Z35.90
2379  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2380  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2381  */
2382 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2383 {
2384     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2385         addinfo ? " -- " : "", addinfo ? addinfo : "");
2386     return zget_init_diagnostics(odr, error, addinfo);
2387 }
2388
2389 /*
2390  * nonsurrogate diagnostic record.
2391  */
2392 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2393 {
2394     Z_Records *rec = (Z_Records *) odr_malloc(assoc->encode, sizeof(*rec));
2395
2396     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2397             addinfo ? " -- " : "", addinfo ? addinfo : "");
2398
2399     rec->which = Z_Records_NSD;
2400     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2401                                                            error, addinfo);
2402     return rec;
2403 }
2404
2405 /*
2406  * surrogate diagnostic.
2407  */
2408 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2409                                           const char *dbname,
2410                                           int error, const char *addinfo)
2411 {
2412     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2413             addinfo ? " -- " : "", addinfo ? addinfo : "");
2414     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2415 }
2416
2417 static Z_Records *pack_records(association *a, char *setname, Odr_int start,
2418                                Odr_int *num, Z_RecordComposition *comp,
2419                                Odr_int *next, Odr_int *pres,
2420                                Z_ReferenceId *referenceId,
2421                                Odr_oid *oid, int *errcode)
2422 {
2423     int recno, total_length = 0, dumped_records = 0;
2424     int toget = odr_int_to_int(*num);
2425     Z_Records *records =
2426         (Z_Records *) odr_malloc(a->encode, sizeof(*records));
2427     Z_NamePlusRecordList *reclist =
2428         (Z_NamePlusRecordList *) odr_malloc(a->encode, sizeof(*reclist));
2429     Z_NamePlusRecord **list =
2430         (Z_NamePlusRecord **) odr_malloc(a->encode, sizeof(*list) * toget);
2431
2432     records->which = Z_Records_DBOSD;
2433     records->u.databaseOrSurDiagnostics = reclist;
2434     reclist->num_records = 0;
2435     reclist->records = list;
2436     *pres = Z_PresentStatus_success;
2437     *num = 0;
2438     *next = 0;
2439
2440     yaz_log(log_requestdetail, "Request to pack " ODR_INT_PRINTF "+%d %s", start, toget, setname);
2441     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2442         a->maximumRecordSize);
2443     for (recno = odr_int_to_int(start); reclist->num_records < toget; recno++)
2444     {
2445         bend_fetch_rr freq;
2446         Z_NamePlusRecord *thisrec;
2447         int this_length = 0;
2448         /*
2449          * we get the number of bytes allocated on the stream before any
2450          * allocation done by the backend - this should give us a reasonable
2451          * idea of the total size of the data so far.
2452          */
2453         total_length = odr_total(a->encode) - dumped_records;
2454         freq.errcode = 0;
2455         freq.errstring = 0;
2456         freq.basename = 0;
2457         freq.len = 0;
2458         freq.record = 0;
2459         freq.last_in_set = 0;
2460         freq.setname = setname;
2461         freq.surrogate_flag = 0;
2462         freq.number = recno;
2463         freq.comp = comp;
2464         freq.request_format = oid;
2465         freq.output_format = 0;
2466         freq.stream = a->encode;
2467         freq.print = a->print;
2468         freq.referenceId = referenceId;
2469         freq.schema = 0;
2470
2471         retrieve_fetch(a, &freq);
2472
2473         *next = freq.last_in_set ? 0 : recno + 1;
2474
2475         if (freq.errcode)
2476         {
2477             if (!freq.surrogate_flag) /* non-surrogate diagnostic i.e. global */
2478             {
2479                 char s[20];
2480                 *pres = Z_PresentStatus_failure;
2481                 /* for 'present request out of range',
2482                    set addinfo to record position if not set */
2483                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2484                                 freq.errstring == 0)
2485                 {
2486                     sprintf(s, "%d", recno);
2487                     freq.errstring = s;
2488                 }
2489                 if (errcode)
2490                     *errcode = freq.errcode;
2491                 return diagrec(a, freq.errcode, freq.errstring);
2492             }
2493             reclist->records[reclist->num_records] =
2494                 surrogatediagrec(a, freq.basename, freq.errcode,
2495                                  freq.errstring);
2496             reclist->num_records++;
2497             continue;
2498         }
2499         if (freq.record == 0)  /* no error and no record ? */
2500         {
2501             *next = 0;   /* signal end-of-set and stop */
2502             break;
2503         }
2504         if (freq.len >= 0)
2505             this_length = freq.len;
2506         else
2507             this_length = odr_total(a->encode) - total_length - dumped_records;
2508         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2509             this_length, total_length, dumped_records);
2510         if (a->preferredMessageSize > 0 &&
2511                 this_length + total_length > a->preferredMessageSize)
2512         {
2513             /* record is small enough, really */
2514             if (this_length <= a->preferredMessageSize && recno > start)
2515             {
2516                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2517                 *pres = Z_PresentStatus_partial_2;
2518                 break;
2519             }
2520             /* record can only be fetched by itself */
2521             if (this_length < a->maximumRecordSize)
2522             {
2523                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2524                 if (toget > 1)
2525                 {
2526                     yaz_log(YLOG_DEBUG, "  Dropped it");
2527                     reclist->records[reclist->num_records] =
2528                          surrogatediagrec(a, freq.basename, 16, 0);
2529                     reclist->num_records++;
2530                     dumped_records += this_length;
2531                     continue;
2532                 }
2533             }
2534             else /* too big entirely */
2535             {
2536                 yaz_log(log_requestdetail, "Record > maxrcdsz "
2537                         "this=%d max=%d",
2538                         this_length, a->maximumRecordSize);
2539                 reclist->records[reclist->num_records] =
2540                     surrogatediagrec(a, freq.basename, 17, 0);
2541                 reclist->num_records++;
2542                 dumped_records += this_length;
2543                 continue;
2544             }
2545         }
2546
2547         if (!(thisrec = (Z_NamePlusRecord *)
2548               odr_malloc(a->encode, sizeof(*thisrec))))
2549             return 0;
2550         thisrec->databaseName = odr_strdup_null(a->encode, freq.basename);
2551         thisrec->which = Z_NamePlusRecord_databaseRecord;
2552
2553         if (!freq.output_format)
2554             freq.output_format = freq.request_format;
2555         thisrec->u.databaseRecord = z_ext_record_oid(
2556             a->encode, freq.output_format, freq.record, freq.len);
2557         if (!thisrec->u.databaseRecord)
2558             return 0;
2559         reclist->records[reclist->num_records] = thisrec;
2560         reclist->num_records++;
2561     }
2562     *num = reclist->num_records;
2563     return records;
2564 }
2565
2566 static Z_APDU *process_searchRequest(association *assoc, request *reqb)
2567 {
2568     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2569     bend_search_rr *bsrr =
2570         (bend_search_rr *)nmem_malloc(reqb->request_mem, sizeof(*bsrr));
2571
2572     yaz_log(log_requestdetail, "Got SearchRequest.");
2573     bsrr->association = assoc;
2574     bsrr->referenceId = req->referenceId;
2575     bsrr->srw_sortKeys = 0;
2576     bsrr->srw_setname = 0;
2577     bsrr->srw_setnameIdleTime = 0;
2578     bsrr->estimated_hit_count = 0;
2579     bsrr->partial_resultset = 0;
2580     bsrr->extra_args = 0;
2581     bsrr->extra_response_data = 0;
2582
2583     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2584     if (req->databaseNames)
2585     {
2586         int i;
2587         for (i = 0; i < req->num_databaseNames; i++)
2588             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2589     }
2590
2591     yaz_log_zquery_level(log_requestdetail,req->query);
2592
2593     if (assoc->init->bend_search)
2594     {
2595         bsrr->setname = req->resultSetName;
2596         bsrr->replace_set = *req->replaceIndicator;
2597         bsrr->num_bases = req->num_databaseNames;
2598         bsrr->basenames = req->databaseNames;
2599         bsrr->query = req->query;
2600         bsrr->stream = assoc->encode;
2601         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2602         bsrr->decode = assoc->decode;
2603         bsrr->print = assoc->print;
2604         bsrr->hits = 0;
2605         bsrr->errcode = 0;
2606         bsrr->errstring = NULL;
2607         bsrr->search_info = NULL;
2608
2609         if (assoc->server && assoc->server->cql_transform
2610             && req->query->which == Z_Query_type_104
2611             && req->query->u.type_104->which == Z_External_CQL)
2612         {
2613             /* have a CQL query and a CQL to PQF transform .. */
2614             int srw_errcode =
2615                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2616                         assoc->server->cql_transform, bsrr->query);
2617             if (srw_errcode)
2618                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2619         }
2620
2621         if (assoc->server && assoc->server->ccl_transform
2622             && req->query->which == Z_Query_type_2) /*CCL*/
2623         {
2624             /* have a CCL query and a CCL to PQF transform .. */
2625             int srw_errcode =
2626                 ccl2pqf(bsrr->stream, req->query->u.type_2,
2627                         assoc->server->ccl_transform, bsrr);
2628             if (srw_errcode)
2629                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2630         }
2631
2632         if (!bsrr->errcode)
2633             (assoc->init->bend_search)(assoc->backend, bsrr);
2634     }
2635     else
2636     {
2637         /* FIXME - make a diagnostic for it */
2638         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2639     }
2640     return response_searchRequest(assoc, reqb, bsrr);
2641 }
2642
2643 /*
2644  * Prepare a searchresponse based on the backend results. We probably want
2645  * to look at making the fetching of records nonblocking as well, but
2646  * so far, we'll keep things simple.
2647  * If bsrt is null, that means we're called in response to a communications
2648  * event, and we'll have to get the response for ourselves.
2649  */
2650 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2651                                       bend_search_rr *bsrt)
2652 {
2653     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2654     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2655     Z_SearchResponse *resp = (Z_SearchResponse *)
2656         odr_malloc(assoc->encode, sizeof(*resp));
2657     Odr_int *nulint = odr_intdup(assoc->encode, 0);
2658     Odr_int *next = odr_intdup(assoc->encode, 0);
2659     Odr_int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2660     Odr_int returnedrecs = 0;
2661
2662     apdu->which = Z_APDU_searchResponse;
2663     apdu->u.searchResponse = resp;
2664     resp->referenceId = req->referenceId;
2665     resp->additionalSearchInfo = 0;
2666     resp->otherInfo = 0;
2667     if (!bsrt)
2668     {
2669         yaz_log(YLOG_FATAL, "Bad result from backend");
2670         return 0;
2671     }
2672     else if (bsrt->errcode)
2673     {
2674         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2675         resp->resultCount = nulint;
2676         resp->numberOfRecordsReturned = nulint;
2677         resp->nextResultSetPosition = nulint;
2678         resp->searchStatus = odr_booldup(assoc->encode, 0);
2679         resp->resultSetStatus = none;
2680         resp->presentStatus = 0;
2681     }
2682     else
2683     {
2684         bool_t *sr = odr_booldup(assoc->encode, 1);
2685         Odr_int *toget = odr_intdup(assoc->encode, 0);
2686         Z_RecordComposition comp, *compp = 0;
2687
2688         yaz_log(log_requestdetail, "resultCount: " ODR_INT_PRINTF, bsrt->hits);
2689
2690         resp->records = 0;
2691         resp->resultCount = &bsrt->hits;
2692
2693         comp.which = Z_RecordComp_simple;
2694         /* how many records does the user agent want, then? */
2695         if (bsrt->hits < 0)
2696             *toget = 0;
2697         else if (bsrt->hits <= *req->smallSetUpperBound)
2698         {
2699             *toget = bsrt->hits;
2700             if ((comp.u.simple = req->smallSetElementSetNames))
2701                 compp = &comp;
2702         }
2703         else if (bsrt->hits < *req->largeSetLowerBound)
2704         {
2705             *toget = *req->mediumSetPresentNumber;
2706             if (*toget > bsrt->hits)
2707                 *toget = bsrt->hits;
2708             if ((comp.u.simple = req->mediumSetElementSetNames))
2709                 compp = &comp;
2710         }
2711         else
2712             *toget = 0;
2713
2714         if (*toget && !resp->records)
2715         {
2716             Odr_int *presst = odr_intdup(assoc->encode, 0);
2717             /* Call bend_present if defined */
2718             if (assoc->init->bend_present)
2719             {
2720                 bend_present_rr *bprr = (bend_present_rr *)
2721                     nmem_malloc(reqb->request_mem, sizeof(*bprr));
2722                 bprr->setname = req->resultSetName;
2723                 bprr->start = 1;
2724                 bprr->number = odr_int_to_int(*toget);
2725                 bprr->format = req->preferredRecordSyntax;
2726                 bprr->comp = compp;
2727                 bprr->referenceId = req->referenceId;
2728                 bprr->stream = assoc->encode;
2729                 bprr->print = assoc->print;
2730                 bprr->association = assoc;
2731                 bprr->errcode = 0;
2732                 bprr->errstring = NULL;
2733                 (*assoc->init->bend_present)(assoc->backend, bprr);
2734
2735                 if (bprr->errcode)
2736                 {
2737                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2738                     *resp->presentStatus = Z_PresentStatus_failure;
2739                 }
2740             }
2741
2742             if (!resp->records)
2743                 resp->records = pack_records(
2744                     assoc, req->resultSetName, 1,
2745                     toget, compp, next, presst, req->referenceId,
2746                     req->preferredRecordSyntax, NULL);
2747             if (!resp->records)
2748                 return 0;
2749             resp->numberOfRecordsReturned = toget;
2750             returnedrecs = *toget;
2751             resp->presentStatus = presst;
2752         }
2753         else
2754         {
2755             if (*resp->resultCount)
2756                 *next = 1;
2757             resp->numberOfRecordsReturned = nulint;
2758             resp->presentStatus = 0;
2759         }
2760         resp->nextResultSetPosition = next;
2761         resp->searchStatus = sr;
2762         resp->resultSetStatus = 0;
2763         if (bsrt->estimated_hit_count)
2764         {
2765             resp->resultSetStatus = odr_intdup(assoc->encode,
2766                                                Z_SearchResponse_estimate);
2767         }
2768         else if (bsrt->partial_resultset)
2769         {
2770             resp->resultSetStatus = odr_intdup(assoc->encode,
2771                                                Z_SearchResponse_subset);
2772         }
2773     }
2774     resp->additionalSearchInfo = bsrt->search_info;
2775
2776     if (log_request)
2777     {
2778         int i;
2779         WRBUF wr = wrbuf_alloc();
2780
2781         for (i = 0 ; i < req->num_databaseNames; i++)
2782         {
2783             if (i)
2784                 wrbuf_printf(wr, "+");
2785             wrbuf_puts(wr, req->databaseNames[i]);
2786         }
2787         wrbuf_printf(wr, " ");
2788
2789         if (bsrt->errcode)
2790             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2791         else
2792             wrbuf_printf(wr, "OK " ODR_INT_PRINTF, bsrt->hits);
2793         wrbuf_printf(wr, " %s 1+" ODR_INT_PRINTF " ",
2794                      req->resultSetName, returnedrecs);
2795         yaz_query_to_wrbuf(wr, req->query);
2796
2797         yaz_log(log_request, "Search %s", wrbuf_cstr(wr));
2798         wrbuf_destroy(wr);
2799     }
2800     return apdu;
2801 }
2802
2803 /*
2804  * Maybe we got a little over-friendly when we designed bend_fetch to
2805  * get only one record at a time. Some backends can optimise multiple-record
2806  * fetches, and at any rate, there is some overhead involved in
2807  * all that selecting and hopping around. Problem is, of course, that the
2808  * frontend can't know ahead of time how many records it'll need to
2809  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2810  * is downright lousy as a bulk data transfer protocol.
2811  *
2812  * To start with, we'll do the fetching of records from the backend
2813  * in one operation: To save some trips in and out of the event-handler,
2814  * and to simplify the interface to pack_records. At any rate, asynch
2815  * operation is more fun in operations that have an unpredictable execution
2816  * speed - which is normally more true for search than for present.
2817  */
2818 static Z_APDU *process_presentRequest(association *assoc, request *reqb)
2819 {
2820     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2821     Z_APDU *apdu;
2822     Z_PresentResponse *resp;
2823     Odr_int *next;
2824     Odr_int *num;
2825     int errcode = 0;
2826     const char *errstring = 0;
2827
2828     yaz_log(log_requestdetail, "Got PresentRequest.");
2829
2830     resp = (Z_PresentResponse *)odr_malloc(assoc->encode, sizeof(*resp));
2831     resp->records = 0;
2832     resp->presentStatus = odr_intdup(assoc->encode, 0);
2833     if (assoc->init->bend_present)
2834     {
2835         bend_present_rr *bprr = (bend_present_rr *)
2836             nmem_malloc(reqb->request_mem, sizeof(*bprr));
2837         bprr->setname = req->resultSetId;
2838         bprr->start = odr_int_to_int(*req->resultSetStartPoint);
2839         bprr->number = odr_int_to_int(*req->numberOfRecordsRequested);
2840         bprr->format = req->preferredRecordSyntax;
2841         bprr->comp = req->recordComposition;
2842         bprr->referenceId = req->referenceId;
2843         bprr->stream = assoc->encode;
2844         bprr->print = assoc->print;
2845         bprr->association = assoc;
2846         bprr->errcode = 0;
2847         bprr->errstring = NULL;
2848         (*assoc->init->bend_present)(assoc->backend, bprr);
2849
2850         if (bprr->errcode)
2851         {
2852             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2853             *resp->presentStatus = Z_PresentStatus_failure;
2854             errcode = bprr->errcode;
2855             errstring = bprr->errstring;
2856         }
2857     }
2858     apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2859     next = odr_intdup(assoc->encode, 0);
2860     num = odr_intdup(assoc->encode, 0);
2861
2862     apdu->which = Z_APDU_presentResponse;
2863     apdu->u.presentResponse = resp;
2864     resp->referenceId = req->referenceId;
2865     resp->otherInfo = 0;
2866
2867     if (!resp->records)
2868     {
2869         *num = *req->numberOfRecordsRequested;
2870         resp->records =
2871             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2872                          num, req->recordComposition, next,
2873                          resp->presentStatus,
2874                          req->referenceId, req->preferredRecordSyntax,
2875                          &errcode);
2876     }
2877     if (log_request)
2878     {
2879         WRBUF wr = wrbuf_alloc();
2880         wrbuf_printf(wr, "Present ");
2881
2882         if (*resp->presentStatus == Z_PresentStatus_failure)
2883             wrbuf_printf(wr, "ERROR %d ", errcode);
2884         else if (*resp->presentStatus == Z_PresentStatus_success)
2885             wrbuf_printf(wr, "OK -  ");
2886         else
2887             wrbuf_printf(wr, "Partial " ODR_INT_PRINTF " - ",
2888                          *resp->presentStatus);
2889
2890         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
2891                 req->resultSetId, *req->resultSetStartPoint,
2892                 *req->numberOfRecordsRequested);
2893         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
2894         wrbuf_destroy(wr);
2895     }
2896     if (!resp->records)
2897         return 0;
2898     resp->numberOfRecordsReturned = num;
2899     resp->nextResultSetPosition = next;
2900
2901     return apdu;
2902 }
2903
2904 /*
2905  * Scan was implemented rather in a hurry, and with support for only the basic
2906  * elements of the service in the backend API. Suggestions are welcome.
2907  */
2908 static Z_APDU *process_scanRequest(association *assoc, request *reqb)
2909 {
2910     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2911     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2912     Z_ScanResponse *res = (Z_ScanResponse *)
2913         odr_malloc(assoc->encode, sizeof(*res));
2914     Odr_int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2915     Odr_int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2916     Z_ListEntries *ents = (Z_ListEntries *)
2917         odr_malloc(assoc->encode, sizeof(*ents));
2918     Z_DiagRecs *diagrecs_p = NULL;
2919     bend_scan_rr *bsrr = (bend_scan_rr *)
2920         odr_malloc(assoc->encode, sizeof(*bsrr));
2921     struct scan_entry *save_entries;
2922     int step_size = 0;
2923
2924     yaz_log(log_requestdetail, "Got ScanRequest");
2925
2926     apdu->which = Z_APDU_scanResponse;
2927     apdu->u.scanResponse = res;
2928     res->referenceId = req->referenceId;
2929
2930     /* if step is absent, set it to 0 */
2931     if (req->stepSize)
2932         step_size = odr_int_to_int(*req->stepSize);
2933
2934     res->scanStatus = scanStatus;
2935     res->numberOfEntriesReturned = numberOfEntriesReturned;
2936     res->positionOfTerm = 0;
2937     res->entries = ents;
2938     ents->num_entries = 0;
2939     ents->entries = NULL;
2940     ents->num_nonsurrogateDiagnostics = 0;
2941     ents->nonsurrogateDiagnostics = NULL;
2942     res->attributeSet = 0;
2943     res->otherInfo = 0;
2944
2945     if (req->databaseNames)
2946     {
2947         int i;
2948         for (i = 0; i < req->num_databaseNames; i++)
2949             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2950     }
2951     bsrr->scanClause = 0;
2952     bsrr->errcode = 0;
2953     bsrr->errstring = 0;
2954     bsrr->num_bases = req->num_databaseNames;
2955     bsrr->basenames = req->databaseNames;
2956     bsrr->num_entries = odr_int_to_int(*req->numberOfTermsRequested);
2957     bsrr->term = req->termListAndStartPoint;
2958     bsrr->referenceId = req->referenceId;
2959     bsrr->stream = assoc->encode;
2960     bsrr->print = assoc->print;
2961     bsrr->step_size = &step_size;
2962     bsrr->setname = yaz_oi_get_string_oid(&req->otherInfo,
2963                                           yaz_oid_userinfo_scan_set, 1, 0);
2964     bsrr->entries = 0;
2965     /* For YAZ 2.0 and earlier it was the backend handler that
2966        initialized entries (member display_term did not exist)
2967        YAZ 2.0 and later sets 'entries'  and initialize all members
2968        including 'display_term'. If YAZ 2.0 or later sees that
2969        entries was modified - we assume that it is an old handler and
2970        that 'display_term' is _not_ set.
2971     */
2972     if (bsrr->num_entries > 0)
2973     {
2974         int i;
2975         bsrr->entries = (struct scan_entry *)
2976             odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
2977                        bsrr->num_entries);
2978         for (i = 0; i<bsrr->num_entries; i++)
2979         {
2980             bsrr->entries[i].term = 0;
2981             bsrr->entries[i].occurrences = 0;
2982             bsrr->entries[i].errcode = 0;
2983             bsrr->entries[i].errstring = 0;
2984             bsrr->entries[i].display_term = 0;
2985         }
2986     }
2987     save_entries = bsrr->entries;  /* save it so we can compare later */
2988
2989     bsrr->attributeset = req->attributeSet;
2990     log_scan_term_level(log_requestdetail, req->termListAndStartPoint,
2991                         bsrr->attributeset);
2992     bsrr->term_position = req->preferredPositionInResponse ?
2993         odr_int_to_int(*req->preferredPositionInResponse) : 1;
2994
2995     ((int (*)(void *, bend_scan_rr *))
2996      (*assoc->init->bend_scan))(assoc->backend, bsrr);
2997
2998     if (bsrr->errcode)
2999         diagrecs_p = zget_DiagRecs(assoc->encode,
3000                                    bsrr->errcode, bsrr->errstring);
3001     else
3002     {
3003         int i;
3004         Z_Entry **tab = (Z_Entry **)
3005             odr_malloc(assoc->encode, sizeof(*tab) * bsrr->num_entries);
3006
3007         if (bsrr->status == BEND_SCAN_PARTIAL)
3008             *scanStatus = Z_Scan_partial_5;
3009         else
3010             *scanStatus = Z_Scan_success;
3011         res->stepSize = odr_intdup(assoc->encode, step_size);
3012         ents->entries = tab;
3013         ents->num_entries = bsrr->num_entries;
3014         res->numberOfEntriesReturned = odr_intdup(assoc->encode,
3015                                                    ents->num_entries);
3016         res->positionOfTerm = odr_intdup(assoc->encode, bsrr->term_position);
3017         for (i = 0; i < bsrr->num_entries; i++)
3018         {
3019             Z_Entry *e;
3020             Z_TermInfo *t;
3021             Odr_oct *o;
3022
3023             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3024             if (bsrr->entries[i].occurrences >= 0)
3025             {
3026                 e->which = Z_Entry_termInfo;
3027                 e->u.termInfo = t = (Z_TermInfo *)
3028                     odr_malloc(assoc->encode, sizeof(*t));
3029                 t->suggestedAttributes = 0;
3030                 t->displayTerm = 0;
3031                 if (save_entries == bsrr->entries &&
3032                     bsrr->entries[i].display_term)
3033                 {
3034                     /* the entries was _not_ set by the handler. So it's
3035                        safe to test for new member display_term. It is
3036                        NULL'ed by us.
3037                     */
3038                     t->displayTerm = odr_strdup(assoc->encode,
3039                                                 bsrr->entries[i].display_term);
3040                 }
3041                 t->alternativeTerm = 0;
3042                 t->byAttributes = 0;
3043                 t->otherTermInfo = 0;
3044                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3045                 t->term = (Z_Term *)
3046                     odr_malloc(assoc->encode, sizeof(*t->term));
3047                 t->term->which = Z_Term_general;
3048                 t->term->u.general = o =
3049                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3050                 o->buf = (unsigned char *)
3051                     odr_malloc(assoc->encode, o->len = o->size =
3052                                strlen(bsrr->entries[i].term));
3053                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3054                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (" ODR_INT_PRINTF ")", i,
3055                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3056             }
3057             else
3058             {
3059                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3060                                                   bsrr->entries[i].errcode,
3061                                                   bsrr->entries[i].errstring);
3062                 assert(drecs->num_diagRecs == 1);
3063                 e->which = Z_Entry_surrogateDiagnostic;
3064                 assert(drecs->diagRecs[0]);
3065                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3066             }
3067         }
3068     }
3069     if (diagrecs_p)
3070     {
3071         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3072         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3073     }
3074     if (log_request)
3075     {
3076         int i;
3077         WRBUF wr = wrbuf_alloc();
3078         wrbuf_printf(wr, "Scan ");
3079         for (i = 0 ; i < req->num_databaseNames; i++)
3080         {
3081             if (i)
3082                 wrbuf_printf(wr, "+");
3083             wrbuf_puts(wr, req->databaseNames[i]);
3084         }
3085
3086         wrbuf_printf(wr, " ");
3087
3088         if (bsrr->errcode)
3089             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3090         else
3091             wrbuf_printf(wr, "OK");
3092
3093         wrbuf_printf(wr, " " ODR_INT_PRINTF " - " ODR_INT_PRINTF "+"
3094                      ODR_INT_PRINTF "+" ODR_INT_PRINTF,
3095                      res->numberOfEntriesReturned ?
3096                      *res->numberOfEntriesReturned : 0,
3097                      (req->preferredPositionInResponse ?
3098                       *req->preferredPositionInResponse : 1),
3099                      *req->numberOfTermsRequested,
3100                      (res->stepSize ? *res->stepSize : 1));
3101
3102         if (bsrr->setname)
3103             wrbuf_printf(wr, "+%s", bsrr->setname);
3104
3105         wrbuf_printf(wr, " ");
3106         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3107                           bsrr->attributeset);
3108         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3109         wrbuf_destroy(wr);
3110     }
3111     return apdu;
3112 }
3113
3114 static Z_APDU *process_sortRequest(association *assoc, request *reqb)
3115 {
3116     int i;
3117     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3118     Z_SortResponse *res = (Z_SortResponse *)
3119         odr_malloc(assoc->encode, sizeof(*res));
3120     bend_sort_rr *bsrr = (bend_sort_rr *)
3121         odr_malloc(assoc->encode, sizeof(*bsrr));
3122
3123     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3124
3125     yaz_log(log_requestdetail, "Got SortRequest.");
3126
3127     bsrr->num_input_setnames = req->num_inputResultSetNames;
3128     for (i=0;i<req->num_inputResultSetNames;i++)
3129         yaz_log(log_requestdetail, "Input resultset: '%s'",
3130                 req->inputResultSetNames[i]);
3131     bsrr->input_setnames = req->inputResultSetNames;
3132     bsrr->referenceId = req->referenceId;
3133     bsrr->output_setname = req->sortedResultSetName;
3134     yaz_log(log_requestdetail, "Output resultset: '%s'",
3135                 req->sortedResultSetName);
3136     bsrr->sort_sequence = req->sortSequence;
3137        /*FIXME - dump those sequences too */
3138     bsrr->stream = assoc->encode;
3139     bsrr->print = assoc->print;
3140
3141     bsrr->sort_status = Z_SortResponse_failure;
3142     bsrr->errcode = 0;
3143     bsrr->errstring = 0;
3144
3145     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3146
3147     res->referenceId = bsrr->referenceId;
3148     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3149     res->resultSetStatus = 0;
3150     if (bsrr->errcode)
3151     {
3152         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3153                                        bsrr->errcode, bsrr->errstring);
3154         res->diagnostics = dr->diagRecs;
3155         res->num_diagnostics = dr->num_diagRecs;
3156     }
3157     else
3158     {
3159         res->num_diagnostics = 0;
3160         res->diagnostics = 0;
3161     }
3162     res->resultCount = 0;
3163     res->otherInfo = 0;
3164
3165     apdu->which = Z_APDU_sortResponse;
3166     apdu->u.sortResponse = res;
3167     if (log_request)
3168     {
3169         WRBUF wr = wrbuf_alloc();
3170         wrbuf_printf(wr, "Sort ");
3171         if (bsrr->errcode)
3172             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3173         else
3174             wrbuf_printf(wr,  "OK -");
3175         wrbuf_printf(wr, " (");
3176         for (i = 0; i<req->num_inputResultSetNames; i++)
3177         {
3178             if (i)
3179                 wrbuf_printf(wr, "+");
3180             wrbuf_puts(wr, req->inputResultSetNames[i]);
3181         }
3182         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3183
3184         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3185         wrbuf_destroy(wr);
3186     }
3187     return apdu;
3188 }
3189
3190 static Z_APDU *process_deleteRequest(association *assoc, request *reqb)
3191 {
3192     int i;
3193     Z_DeleteResultSetRequest *req =
3194         reqb->apdu_request->u.deleteResultSetRequest;
3195     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3196         odr_malloc(assoc->encode, sizeof(*res));
3197     bend_delete_rr *bdrr = (bend_delete_rr *)
3198         odr_malloc(assoc->encode, sizeof(*bdrr));
3199     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3200
3201     yaz_log(log_requestdetail, "Got DeleteRequest.");
3202
3203     bdrr->num_setnames = req->num_resultSetList;
3204     bdrr->setnames = req->resultSetList;
3205     for (i = 0; i<req->num_resultSetList; i++)
3206         yaz_log(log_requestdetail, "resultset: '%s'",
3207                 req->resultSetList[i]);
3208     bdrr->stream = assoc->encode;
3209     bdrr->print = assoc->print;
3210     bdrr->function = odr_int_to_int(*req->deleteFunction);
3211     bdrr->referenceId = req->referenceId;
3212     bdrr->statuses = 0;
3213     if (bdrr->num_setnames > 0)
3214     {
3215         bdrr->statuses = (int*)
3216             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3217                        bdrr->num_setnames);
3218         for (i = 0; i < bdrr->num_setnames; i++)
3219             bdrr->statuses[i] = 0;
3220     }
3221     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3222
3223     res->referenceId = req->referenceId;
3224
3225     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3226
3227     res->deleteListStatuses = 0;
3228     if (bdrr->num_setnames > 0)
3229     {
3230         int i;
3231         res->deleteListStatuses = (Z_ListStatuses *)
3232             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3233         res->deleteListStatuses->num = bdrr->num_setnames;
3234         res->deleteListStatuses->elements =
3235             (Z_ListStatus **)
3236             odr_malloc(assoc->encode,
3237                         sizeof(*res->deleteListStatuses->elements) *
3238                         bdrr->num_setnames);
3239         for (i = 0; i<bdrr->num_setnames; i++)
3240         {
3241             res->deleteListStatuses->elements[i] =
3242                 (Z_ListStatus *)
3243                 odr_malloc(assoc->encode,
3244                             sizeof(**res->deleteListStatuses->elements));
3245             res->deleteListStatuses->elements[i]->status =
3246                 odr_intdup(assoc->encode, bdrr->statuses[i]);
3247             res->deleteListStatuses->elements[i]->id =
3248                 odr_strdup(assoc->encode, bdrr->setnames[i]);
3249         }
3250     }
3251     res->numberNotDeleted = 0;
3252     res->bulkStatuses = 0;
3253     res->deleteMessage = 0;
3254     res->otherInfo = 0;
3255
3256     apdu->which = Z_APDU_deleteResultSetResponse;
3257     apdu->u.deleteResultSetResponse = res;
3258     if (log_request)
3259     {
3260         WRBUF wr = wrbuf_alloc();
3261         wrbuf_printf(wr, "Delete ");
3262         if (bdrr->delete_status)
3263             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3264         else
3265             wrbuf_printf(wr, "OK -");
3266         for (i = 0; i<req->num_resultSetList; i++)
3267             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3268         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3269         wrbuf_destroy(wr);
3270     }
3271     return apdu;
3272 }
3273
3274 static void process_close(association *assoc, request *reqb)
3275 {
3276     Z_Close *req = reqb->apdu_request->u.close;
3277     static char *reasons[] =
3278     {
3279         "finished",
3280         "shutdown",
3281         "systemProblem",
3282         "costLimit",
3283         "resources",
3284         "securityViolation",
3285         "protocolError",
3286         "lackOfActivity",
3287         "peerAbort",
3288         "unspecified"
3289     };
3290
3291     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3292         reasons[*req->closeReason], req->diagnosticInformation ?
3293         req->diagnosticInformation : "NULL");
3294     if (assoc->version < 3) /* to make do_force respond with close */
3295         assoc->version = 3;
3296     do_close_req(assoc, Z_Close_finished,
3297                  "Association terminated by client", reqb);
3298     yaz_log(log_request,"Close OK");
3299 }
3300
3301 static Z_APDU *process_segmentRequest(association *assoc, request *reqb)
3302 {
3303     bend_segment_rr req;
3304
3305     req.segment = reqb->apdu_request->u.segmentRequest;
3306     req.stream = assoc->encode;
3307     req.decode = assoc->decode;
3308     req.print = assoc->print;
3309     req.association = assoc;
3310
3311     (*assoc->init->bend_segment)(assoc->backend, &req);
3312
3313     return 0;
3314 }
3315
3316 static Z_APDU *process_ESRequest(association *assoc, request *reqb)
3317 {
3318     bend_esrequest_rr esrequest;
3319     const char *ext_name = "unknown";
3320
3321     Z_ExtendedServicesRequest *req =
3322         reqb->apdu_request->u.extendedServicesRequest;
3323     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3324
3325     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3326
3327     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3328     esrequest.stream = assoc->encode;
3329     esrequest.decode = assoc->decode;
3330     esrequest.print = assoc->print;
3331     esrequest.errcode = 0;
3332     esrequest.errstring = NULL;
3333     esrequest.association = assoc;
3334     esrequest.taskPackage = 0;
3335     esrequest.referenceId = req->referenceId;
3336
3337     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3338     {
3339         switch(esrequest.esr->taskSpecificParameters->which)
3340         {
3341         case Z_External_itemOrder:
3342             ext_name = "ItemOrder"; break;
3343         case Z_External_update:
3344             ext_name = "Update"; break;
3345         case Z_External_update0:
3346             ext_name = "Update0"; break;
3347         case Z_External_ESAdmin:
3348             ext_name = "Admin"; break;
3349
3350         }
3351     }
3352
3353     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3354
3355     resp->referenceId = req->referenceId;
3356
3357     if (esrequest.errcode == -1)
3358     {
3359         /* Backend service indicates request will be processed */
3360         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3361         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3362     }
3363     else if (esrequest.errcode == 0)
3364     {
3365         /* Backend service indicates request will be processed */
3366         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3367         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3368     }
3369     else
3370     {
3371         Z_DiagRecs *diagRecs =
3372             zget_DiagRecs(assoc->encode, esrequest.errcode,
3373                           esrequest.errstring);
3374         /* Backend indicates error, request will not be processed */
3375         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3376         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3377         resp->num_diagnostics = diagRecs->num_diagRecs;
3378         resp->diagnostics = diagRecs->diagRecs;
3379         if (log_request)
3380         {
3381             WRBUF wr = wrbuf_alloc();
3382             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3383             yaz_log(log_request, "EsRequest %s", wrbuf_cstr(wr) );
3384             wrbuf_destroy(wr);
3385         }
3386
3387     }
3388     /* Do something with the members of bend_extendedservice */
3389     if (esrequest.taskPackage)
3390     {
3391         resp->taskPackage = z_ext_record_oid(
3392             assoc->encode, yaz_oid_recsyn_extended,
3393             (const char *)  esrequest.taskPackage, -1);
3394     }
3395     yaz_log(YLOG_DEBUG,"Send the result apdu");
3396     return apdu;
3397 }
3398
3399 int bend_assoc_is_alive(bend_association assoc)
3400 {
3401     if (assoc->state == ASSOC_DEAD)
3402         return 0; /* already marked as dead. Don't check I/O chan anymore */
3403
3404     return iochan_is_alive(assoc->client_chan);
3405 }
3406
3407
3408 /*
3409  * Local variables:
3410  * c-basic-offset: 4
3411  * c-file-style: "Stroustrup"
3412  * indent-tabs-mode: nil
3413  * End:
3414  * vim: shiftwidth=4 tabstop=8 expandtab
3415  */
3416