src/seshigh.c

   1 /* This file is part of the YAZ toolkit.
   2  * Copyright (C) 1995-2013 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 #if HAVE_CONFIG_H
  29 #include <config.h>
  30 #endif
  31
  32 #include <limits.h>
  33 #include <stdlib.h>
  34 #include <stdio.h>
  35 #include <assert.h>
  36
  37 #if HAVE_SYS_TYPES_H
  38 #include <sys/types.h>
  39 #endif
  40 #if HAVE_SYS_STAT_H
  41 #include <sys/stat.h>
  42 #endif
  43
  44 #ifdef WIN32
  45 #include <io.h>
  46 #define S_ISREG(x) (x & _S_IFREG)
  47 #include <process.h>
  48 #endif
  49
  50 #if HAVE_UNISTD_H
  51 #include <unistd.h>
  52 #endif
  53
  54 #if YAZ_HAVE_XML2
  55 #include <libxml/parser.h>
  56 #include <libxml/tree.h>
  57 #endif
  58
  59 #include <yaz/xmalloc.h>
  60 #include <yaz/comstack.h>
  61 #include "eventl.h"
  62 #include "session.h"
  63 #include "mime.h"
  64 #include <yaz/proto.h>
  65 #include <yaz/oid_db.h>
  66 #include <yaz/log.h>
  67 #include <yaz/logrpn.h>
  68 #include <yaz/querytowrbuf.h>
  69 #include <yaz/statserv.h>
  70 #include <yaz/diagbib1.h>
  71 #include <yaz/charneg.h>
  72 #include <yaz/otherinfo.h>
  73 #include <yaz/yaz-util.h>
  74 #include <yaz/pquery.h>
  75 #include <yaz/oid_db.h>
  76
  77 #include <yaz/srw.h>
  78 #include <yaz/backend.h>
  79 #include <yaz/yaz-ccl.h>
  80
  81 static void process_gdu_request(association *assoc, request *req);
  82 static int process_z_request(association *assoc, request *req, char **msg);
  83 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  84 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  85 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  86 static Z_External *init_diagnostics(ODR odr, int errcode,
  87                                     const char *errstring);
  88 static Z_APDU *process_searchRequest(association *assoc, request *reqb);
  89 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  90                                       bend_search_rr *bsrr);
  91 static Z_APDU *process_presentRequest(association *assoc, request *reqb);
  92 static Z_APDU *process_scanRequest(association *assoc, request *reqb);
  93 static Z_APDU *process_sortRequest(association *assoc, request *reqb);
  94 static void process_close(association *assoc, request *reqb);
  95 static Z_APDU *process_deleteRequest(association *assoc, request *reqb);
  96 static Z_APDU *process_segmentRequest(association *assoc, request *reqb);
  97 static Z_APDU *process_ESRequest(association *assoc, request *reqb);
  98
  99 /* dynamic logging levels */
 100 static int logbits_set = 0;
 101 static int log_session = 0; /* one-line logs for session */
 102 static int log_sessiondetail = 0; /* more detailed stuff */
 103 static int log_request = 0; /* one-line logs for requests */
 104 static int log_requestdetail = 0;  /* more detailed stuff */
 105
 106 /** get_logbits sets global loglevel bits */
 107 static void get_logbits(void)
 108 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 109     if (!logbits_set)
 110     {
 111         logbits_set = 1;
 112         log_session = yaz_log_module_level("session");
 113         log_sessiondetail = yaz_log_module_level("sessiondetail");
 114         log_request = yaz_log_module_level("request");
 115         log_requestdetail = yaz_log_module_level("requestdetail");
 116     }
 117 }
 118
 119 static void wr_diag(WRBUF w, int error, const char *addinfo)
 120 {
 121     wrbuf_printf(w, "ERROR %d+", error);
 122     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
 123     if (addinfo)
 124     {
 125         wrbuf_puts(w, "+");
 126         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
 127     }
 128     wrbuf_puts(w, " ");
 129 }
 130
 131 static int odr_int_to_int(Odr_int v)
 132 {
 133     if (v >= INT_MAX)
 134         return INT_MAX;
 135     else if (v <= INT_MIN)
 136         return INT_MIN;
 137     else
 138         return (int) v;
 139 }
 140
 141 /*
 142  * Create and initialize a new association-handle.
 143  *  channel  : iochannel for the current line.
 144  *  link     : communications channel.
 145  * Returns: 0 or a new association handle.
 146  */
 147 association *create_association(IOCHAN channel, COMSTACK link,
 148                                 const char *apdufile)
 149 {
 150     association *anew;
 151
 152     if (!logbits_set)
 153         get_logbits();
 154     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 155         return 0;
 156     anew->init = 0;
 157     anew->version = 0;
 158     anew->last_control = 0;
 159     anew->client_chan = channel;
 160     anew->client_link = link;
 161     anew->cs_get_mask = 0;
 162     anew->cs_put_mask = 0;
 163     anew->cs_accept_mask = 0;
 164     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 165         !(anew->encode = odr_createmem(ODR_ENCODE)))
 166         return 0;
 167     if (apdufile && *apdufile)
 168     {
 169         FILE *f;
 170
 171         if (!(anew->print = odr_createmem(ODR_PRINT)))
 172             return 0;
 173         if (*apdufile == '@')
 174         {
 175             odr_setprint(anew->print, yaz_log_file());
 176         }
 177         else if (*apdufile != '-')
 178         {
 179             char filename[256];
 180             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 181             if (!(f = fopen(filename, "w")))
 182             {
 183                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 184                 return 0;
 185             }
 186             setvbuf(f, 0, _IONBF, 0);
 187             odr_setprint(anew->print, f);
 188         }
 189     }
 190     else
 191         anew->print = 0;
 192     anew->input_buffer = 0;
 193     anew->input_buffer_len = 0;
 194     anew->backend = 0;
 195     anew->state = ASSOC_NEW;
 196     request_initq(&anew->incoming);
 197     request_initq(&anew->outgoing);
 198     anew->proto = cs_getproto(link);
 199     anew->server = 0;
 200     return anew;
 201 }
 202
 203 /*
 204  * Free association and release resources.
 205  */
 206 void destroy_association(association *h)
 207 {
 208     statserv_options_block *cb = statserv_getcontrol();
 209     request *req;
 210
 211     xfree(h->init);
 212     odr_destroy(h->decode);
 213     odr_destroy(h->encode);
 214     if (h->print)
 215         odr_destroy(h->print);
 216     if (h->input_buffer)
 217     xfree(h->input_buffer);
 218     if (h->backend)
 219         (*cb->bend_close)(h->backend);
 220     while ((req = request_deq(&h->incoming)))
 221         request_release(req);
 222     while ((req = request_deq(&h->outgoing)))
 223         request_release(req);
 224     request_delq(&h->incoming);
 225     request_delq(&h->outgoing);
 226     xfree(h);
 227     xmalloc_trav("session closed");
 228 }
 229
 230 static void do_close_req(association *a, int reason, char *message,
 231                          request *req)
 232 {
 233     Z_APDU *apdu = zget_APDU(a->encode, Z_APDU_close);
 234     Z_Close *cls = apdu->u.close;
 235
 236     /* Purge request queue */
 237     while (request_deq(&a->incoming));
 238     while (request_deq(&a->outgoing));
 239     if (a->version >= 3)
 240     {
 241         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 242             reason, message ? message : "none");
 243         *cls->closeReason = reason;
 244         cls->diagnosticInformation = message;
 245         process_z_response(a, req, apdu);
 246         iochan_settimeout(a->client_chan, 20);
 247     }
 248     else
 249     {
 250         request_release(req);
 251         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 252         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 253         a->cs_put_mask = 0;
 254     }
 255     a->state = ASSOC_DEAD;
 256 }
 257
 258 static void do_close(association *a, int reason, char *message)
 259 {
 260     request *req = request_get(&a->outgoing);
 261     do_close_req(a, reason, message, req);
 262 }
 263
 264
 265 int ir_read(IOCHAN h, int event)
 266 {
 267     association *assoc = (association *)iochan_getdata(h);
 268     COMSTACK conn = assoc->client_link;
 269     request *req;
 270
 271     if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 272     {
 273         /* We aren't speaking to this fellow */
 274         if (assoc->state == ASSOC_DEAD)
 275         {
 276             yaz_log(log_session, "Connection closed - end of session");
 277             cs_close(conn);
 278             destroy_association(assoc);
 279             iochan_destroy(h);
 280             return 0;
 281         }
 282         assoc->cs_get_mask = EVENT_INPUT;
 283
 284         do
 285         {
 286             int res = cs_get(conn, &assoc->input_buffer,
 287                              &assoc->input_buffer_len);
 288             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 289             {
 290                 yaz_log(log_session, "Connection error: %s res=%d",
 291                         cs_errmsg(cs_errno(conn)), res);
 292                 req = request_get(&assoc->incoming); /* get a new request */
 293                 do_close_req(assoc, Z_Close_protocolError,
 294                              "Incoming package too large", req);
 295                 return 0;
 296             }
 297             else if (res <= 0)
 298             {
 299                 assoc->state = ASSOC_DEAD;
 300                 yaz_log(log_session, "Connection closed by client");
 301                 return 0;
 302             }
 303             else if (res == 1) /* incomplete read - wait for more  */
 304             {
 305                 if (conn->io_pending & CS_WANT_WRITE)
 306                     assoc->cs_get_mask |= EVENT_OUTPUT;
 307                 iochan_setflag(h, assoc->cs_get_mask);
 308                 return 0;
 309             }
 310             /* we got a complete PDU. Let's decode it */
 311             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 312                     assoc->input_buffer[0] & 0xff,
 313                     assoc->input_buffer[1] & 0xff,
 314                     assoc->input_buffer[2] & 0xff);
 315             req = request_get(&assoc->incoming); /* get a new request */
 316             odr_reset(assoc->decode);
 317             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 318             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 319             {
 320                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 321                         "[near byte %ld] ",
 322                         odr_errmsg(odr_geterror(assoc->decode)),
 323                         odr_getelement(assoc->decode),
 324                         (long) odr_offset(assoc->decode));
 325                 if (assoc->decode->error != OHTTP)
 326                 {
 327                     yaz_log(YLOG_WARN, "PDU dump:");
 328                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 329                     request_release(req);
 330                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 331                 }
 332                 else
 333                 {
 334                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 335                     assoc->state = ASSOC_DEAD;
 336                     process_gdu_response(assoc, req, p);
 337                 }
 338                 return 0;
 339             }
 340             req->request_mem = odr_extract_mem(assoc->decode);
 341             if (assoc->print)
 342             {
 343                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 344                     yaz_log(YLOG_WARN, "ODR print error: %s",
 345                             odr_errmsg(odr_geterror(assoc->print)));
 346                 odr_reset(assoc->print);
 347             }
 348             request_enq(&assoc->incoming, req);
 349         }
 350         while (cs_more(conn));
 351     }
 352     return 1;
 353 }
 354
 355 /*
 356  * This is where PDUs from the client are read and the further
 357  * processing is initiated. Flow of control moves down through the
 358  * various process_* functions below, until the encoded result comes back up
 359  * to the output handler in here.
 360  *
 361  *  h     : the I/O channel that has an outstanding event.
 362  *  event : the current outstanding event.
 363  */
 364 void ir_session(IOCHAN h, int event)
 365 {
 366     int res;
 367     association *assoc = (association *)iochan_getdata(h);
 368     COMSTACK conn = assoc->client_link;
 369     request *req;
 370
 371     assert(h && conn && assoc);
 372     if (event == EVENT_TIMEOUT)
 373     {
 374         if (assoc->state != ASSOC_UP)
 375         {
 376             yaz_log(log_session, "Timeout. Closing connection");
 377             /* do we need to lod this at all */
 378             cs_close(conn);
 379             destroy_association(assoc);
 380             iochan_destroy(h);
 381         }
 382         else
 383         {
 384             yaz_log(log_sessiondetail, "Timeout. Sending Z39.50 Close");
 385             do_close(assoc, Z_Close_lackOfActivity, 0);
 386         }
 387         return;
 388     }
 389     if (event & assoc->cs_accept_mask)
 390     {
 391         if (!cs_accept(conn))
 392         {
 393             yaz_log(YLOG_WARN, "accept failed");
 394             destroy_association(assoc);
 395             iochan_destroy(h);
 396             return;
 397         }
 398         iochan_clearflag(h, EVENT_OUTPUT);
 399         if (conn->io_pending)
 400         {   /* cs_accept didn't complete */
 401             assoc->cs_accept_mask =
 402                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 403                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 404
 405             iochan_setflag(h, assoc->cs_accept_mask);
 406         }
 407         else
 408         {   /* cs_accept completed. Prepare for reading (cs_get) */
 409             assoc->cs_accept_mask = 0;
 410             assoc->cs_get_mask = EVENT_INPUT;
 411             iochan_setflag(h, assoc->cs_get_mask);
 412         }
 413         return;
 414     }
 415     if (event & assoc->cs_get_mask) /* input */
 416     {
 417         if (!ir_read(h, event))
 418             return;
 419         req = request_head(&assoc->incoming);
 420         if (req->state == REQUEST_IDLE)
 421         {
 422             request_deq(&assoc->incoming);
 423             process_gdu_request(assoc, req);
 424         }
 425     }
 426     if (event & assoc->cs_put_mask)
 427     {
 428         request *req = request_head(&assoc->outgoing);
 429
 430         assoc->cs_put_mask = 0;
 431         yaz_log(YLOG_DEBUG, "ir_session (output)");
 432         req->state = REQUEST_PENDING;
 433         switch (res = cs_put(conn, req->response, req->len_response))
 434         {
 435         case -1:
 436             yaz_log(log_sessiondetail, "Connection closed by client");
 437             cs_close(conn);
 438             destroy_association(assoc);
 439             iochan_destroy(h);
 440             break;
 441         case 0: /* all sent - release the request structure */
 442             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 443 #if 0
 444             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 445                     req->response);
 446 #endif
 447             request_deq(&assoc->outgoing);
 448             request_release(req);
 449             if (!request_head(&assoc->outgoing))
 450             {   /* restore mask for cs_get operation ... */
 451                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 452                 iochan_setflag(h, assoc->cs_get_mask);
 453                 if (assoc->state == ASSOC_DEAD)
 454                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 455             }
 456             else
 457             {
 458                 assoc->cs_put_mask = EVENT_OUTPUT;
 459             }
 460             break;
 461         default:
 462             if (conn->io_pending & CS_WANT_WRITE)
 463                 assoc->cs_put_mask |= EVENT_OUTPUT;
 464             if (conn->io_pending & CS_WANT_READ)
 465                 assoc->cs_put_mask |= EVENT_INPUT;
 466             iochan_setflag(h, assoc->cs_put_mask);
 467         }
 468     }
 469     if (event & EVENT_EXCEPT)
 470     {
 471         yaz_log(YLOG_WARN, "ir_session (exception)");
 472         cs_close(conn);
 473         destroy_association(assoc);
 474         iochan_destroy(h);
 475     }
 476 }
 477
 478 static int process_z_request(association *assoc, request *req, char **msg);
 479
 480
 481 static void assoc_init_reset(association *assoc)
 482 {
 483     xfree(assoc->init);
 484     assoc->init = (bend_initrequest *) xmalloc(sizeof(*assoc->init));
 485
 486     assoc->init->stream = assoc->encode;
 487     assoc->init->print = assoc->print;
 488     assoc->init->auth = 0;
 489     assoc->init->referenceId = 0;
 490     assoc->init->implementation_version = 0;
 491     assoc->init->implementation_id = 0;
 492     assoc->init->implementation_name = 0;
 493     assoc->init->query_charset = 0;
 494     assoc->init->records_in_same_charset = 0;
 495     assoc->init->bend_sort = NULL;
 496     assoc->init->bend_search = NULL;
 497     assoc->init->bend_present = NULL;
 498     assoc->init->bend_esrequest = NULL;
 499     assoc->init->bend_delete = NULL;
 500     assoc->init->bend_scan = NULL;
 501     assoc->init->bend_segment = NULL;
 502     assoc->init->bend_fetch = NULL;
 503     assoc->init->bend_explain = NULL;
 504     assoc->init->bend_srw_scan = NULL;
 505     assoc->init->bend_srw_update = NULL;
 506     assoc->init->named_result_sets = 0;
 507
 508     assoc->init->charneg_request = NULL;
 509     assoc->init->charneg_response = NULL;
 510
 511     assoc->init->decode = assoc->decode;
 512     assoc->init->peer_name =
 513         odr_strdup(assoc->encode, cs_addrstr(assoc->client_link));
 514
 515     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 516 }
 517
 518 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 519 {
 520     statserv_options_block *cb = statserv_getcontrol();
 521     if (!assoc->init)
 522     {
 523         const char *encoding = "UTF-8";
 524         Z_External *ce;
 525         bend_initresult *binitres;
 526
 527         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 528         assoc_init_reset(assoc);
 529
 530         if (sr->username)
 531         {
 532             Z_IdAuthentication *auth = (Z_IdAuthentication *)
 533                 odr_malloc(assoc->decode, sizeof(*auth));
 534             size_t len;
 535
 536             len = strlen(sr->username) + 1;
 537             if (sr->password)
 538                 len += strlen(sr->password) + 2;
 539             yaz_log(log_requestdetail, "username=%s password-len=%ld",
 540                     sr->username, (long)
 541                     (sr->password ? strlen(sr->password) : 0));
 542             auth->which = Z_IdAuthentication_open;
 543             auth->u.open = (char *) odr_malloc(assoc->decode, len);
 544             strcpy(auth->u.open, sr->username);
 545             if (sr->password && *sr->password)
 546             {
 547                 strcat(auth->u.open, "/");
 548                 strcat(auth->u.open, sr->password);
 549             }
 550             assoc->init->auth = auth;
 551         }
 552
 553 #if 1
 554         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 555         assoc->init->charneg_request = ce->u.charNeg3;
 556 #endif
 557         assoc->backend = 0;
 558         if (!(binitres = (*cb->bend_init)(assoc->init)))
 559         {
 560             assoc->state = ASSOC_DEAD;
 561             yaz_add_srw_diagnostic(assoc->encode, d, num,
 562                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 563             return 0;
 564         }
 565         assoc->backend = binitres->handle;
 566         assoc->init->auth = 0;
 567         if (binitres->errcode)
 568         {
 569             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 570             assoc->state = ASSOC_DEAD;
 571             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 572                                    binitres->errstring);
 573             return 0;
 574         }
 575         return 1;
 576     }
 577     return 1;
 578 }
 579
 580 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 581 {
 582 #if YAZ_HAVE_XML2
 583     yaz_record_conv_t rc = 0;
 584     const char *match_schema = 0;
 585     Odr_oid *match_syntax = 0;
 586
 587     if (assoc->server)
 588     {
 589         int r;
 590         const char *input_schema = yaz_get_esn(rr->comp);
 591         Odr_oid *input_syntax_raw = rr->request_format;
 592
 593         const char *backend_schema = 0;
 594         Odr_oid *backend_syntax = 0;
 595
 596         r = yaz_retrieval_request(assoc->server->retrieval,
 597                                   input_schema,
 598                                   input_syntax_raw,
 599                                   &match_schema,
 600                                   &match_syntax,
 601                                   &rc,
 602                                   &backend_schema,
 603                                   &backend_syntax);
 604         if (r == -1) /* error ? */
 605         {
 606             const char *details = yaz_retrieval_get_error(
 607                 assoc->server->retrieval);
 608
 609             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 610             if (details)
 611                 rr->errstring = odr_strdup(rr->stream, details);
 612             return -1;
 613         }
 614         else if (r == 1 || r == 3)
 615         {
 616             const char *details = input_schema;
 617             rr->errcode =
 618                 YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
 619             if (details)
 620                 rr->errstring = odr_strdup(rr->stream, details);
 621             return -1;
 622         }
 623         else if (r == 2)
 624         {
 625             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 626             if (input_syntax_raw)
 627             {
 628                 char oidbuf[OID_STR_MAX];
 629                 oid_oid_to_dotstring(input_syntax_raw, oidbuf);
 630                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 631             }
 632             return -1;
 633         }
 634         if (backend_schema)
 635         {
 636             yaz_set_esn(&rr->comp, backend_schema, odr_getmem(rr->stream));
 637         }
 638         if (backend_syntax)
 639             rr->request_format = backend_syntax;
 640     }
 641     (*assoc->init->bend_fetch)(assoc->backend, rr);
 642     if (rc && rr->record && rr->errcode == 0)
 643     {   /* post conversion must take place .. */
 644         WRBUF output_record = wrbuf_alloc();
 645         int r = 1;
 646         const char *details = 0;
 647         if (rr->len > 0)
 648         {
 649             r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 650             if (r)
 651                 details = yaz_record_conv_get_error(rc);
 652         }
 653         else if (rr->len == -1 && rr->output_format &&
 654                  !oid_oidcmp(rr->output_format, yaz_oid_recsyn_opac))
 655         {
 656             r = yaz_record_conv_opac_record(
 657                 rc, (Z_OPACRecord *) rr->record, output_record);
 658             if (r)
 659                 details = yaz_record_conv_get_error(rc);
 660         }
 661         if (r == 0 && match_syntax &&
 662             !oid_oidcmp(match_syntax, yaz_oid_recsyn_opac))
 663         {
 664             yaz_marc_t mt = yaz_marc_create();
 665             Z_OPACRecord *opac = 0;
 666             if (yaz_xml_to_opac(mt, wrbuf_buf(output_record),
 667                                 wrbuf_len(output_record),
 668                                 &opac, 0 /* iconv */, rr->stream->mem, 0)
 669                 && opac)
 670             {
 671                 rr->len = -1;
 672                 rr->record = (char *) opac;
 673             }
 674             else
 675             {
 676                 details = "XML to OPAC conversion failed";
 677                 r = 1;
 678             }
 679             yaz_marc_destroy(mt);
 680         }
 681         else if (r == 0)
 682         {
 683             rr->len = wrbuf_len(output_record);
 684             rr->record = (char *) odr_malloc(rr->stream, rr->len);
 685             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 686         }
 687         if (r)
 688         {
 689             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 690             if (details)
 691                 rr->errstring = odr_strdup(rr->stream, details);
 692         }
 693         wrbuf_destroy(output_record);
 694     }
 695     if (match_syntax)
 696         rr->output_format = match_syntax;
 697     if (match_schema)
 698         rr->schema = odr_strdup(rr->stream, match_schema);
 699 #else
 700     (*assoc->init->bend_fetch)(assoc->backend, rr);
 701 #endif
 702     return 0;
 703 }
 704
 705 static int srw_bend_fetch(association *assoc, int pos,
 706                           Z_SRW_searchRetrieveRequest *srw_req,
 707                           Z_SRW_record *record,
 708                           const char **addinfo, int *last_in_set)
 709 {
 710     bend_fetch_rr rr;
 711     ODR o = assoc->encode;
 712
 713     rr.setname = "default";
 714     rr.number = pos;
 715     rr.referenceId = 0;
 716     rr.request_format = odr_oiddup(assoc->decode, yaz_oid_recsyn_xml);
 717
 718     rr.comp = (Z_RecordComposition *)
 719             odr_malloc(assoc->decode, sizeof(*rr.comp));
 720     rr.comp->which = Z_RecordComp_complex;
 721     rr.comp->u.complex = (Z_CompSpec *)
 722             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 723     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 724         odr_malloc(assoc->encode, sizeof(bool_t));
 725     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 726     rr.comp->u.complex->num_dbSpecific = 0;
 727     rr.comp->u.complex->dbSpecific = 0;
 728     rr.comp->u.complex->num_recordSyntax = 0;
 729     rr.comp->u.complex->recordSyntax = 0;
 730
 731     rr.comp->u.complex->generic = (Z_Specification *)
 732             odr_malloc(assoc->decode, sizeof(Z_Specification));
 733
 734     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 735     rr.comp->u.complex->generic->which = Z_Schema_uri;
 736     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 737
 738     /* ESN = recordSchema if recordSchema is present */
 739     rr.comp->u.complex->generic->elementSpec = 0;
 740     if (srw_req->recordSchema)
 741     {
 742         rr.comp->u.complex->generic->elementSpec =
 743             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 744         rr.comp->u.complex->generic->elementSpec->which =
 745             Z_ElementSpec_elementSetName;
 746         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 747             srw_req->recordSchema;
 748     }
 749
 750     rr.stream = assoc->encode;
 751     rr.print = assoc->print;
 752
 753     rr.basename = 0;
 754     rr.len = 0;
 755     rr.record = 0;
 756     rr.last_in_set = 0;
 757     rr.errcode = 0;
 758     rr.errstring = 0;
 759     rr.surrogate_flag = 0;
 760     rr.schema = srw_req->recordSchema;
 761
 762     if (!assoc->init->bend_fetch)
 763         return 1;
 764
 765     retrieve_fetch(assoc, &rr);
 766
 767     *last_in_set = rr.last_in_set;
 768
 769     if (rr.errcode && rr.surrogate_flag)
 770     {
 771         int code = yaz_diag_bib1_to_srw(rr.errcode);
 772         yaz_mk_sru_surrogate(o, record, pos, code, rr.errstring);
 773         return 0;
 774     }
 775     else if (rr.len >= 0)
 776     {
 777         record->recordData_buf = rr.record;
 778         record->recordData_len = rr.len;
 779         record->recordPosition = odr_intdup(o, pos);
 780         record->recordSchema = odr_strdup_null(
 781             o, rr.schema ? rr.schema : srw_req->recordSchema);
 782     }
 783     if (rr.errcode)
 784     {
 785         *addinfo = rr.errstring;
 786         return rr.errcode;
 787     }
 788     return 0;
 789 }
 790
 791 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 792                    Z_Query *query_result, char **sortkeys_p)
 793 {
 794     /* have a CQL query and  CQL to PQF transform .. */
 795     CQL_parser cp = cql_parser_create();
 796     int r;
 797     int srw_errcode = 0;
 798     const char *add = 0;
 799     WRBUF rpn_buf = wrbuf_alloc();
 800
 801     *sortkeys_p = 0;
 802     r = cql_parser_string(cp, cql);
 803     if (r)
 804     {
 805         srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 806     }
 807     if (!r)
 808     {
 809         struct cql_node *cn = cql_parser_result(cp);
 810
 811         /* Syntax OK */
 812         r = cql_transform(ct, cn, wrbuf_vp_puts, rpn_buf);
 813         if (r)
 814             srw_errcode = cql_transform_error(ct, &add);
 815         else
 816         {
 817             char out[100];
 818             int r = cql_sortby_to_sortkeys_buf(cn, out, sizeof(out)-1);
 819
 820             if (r == 0)
 821             {
 822                 if (*out)
 823                     yaz_log(log_requestdetail, "srw_sortKeys '%s'", out);
 824                 *sortkeys_p = odr_strdup(odr, out);
 825             }
 826             else
 827             {
 828                 yaz_log(log_requestdetail, "failed to create srw_sortKeys");
 829                 srw_errcode = YAZ_SRW_UNSUPP_SORT_TYPE;
 830             }
 831         }
 832     }
 833     if (!r)
 834     {
 835         /* Syntax & transform OK. */
 836         /* Convert PQF string to Z39.50 to RPN query struct */
 837         YAZ_PQF_Parser pp = yaz_pqf_create();
 838         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, wrbuf_cstr(rpn_buf));
 839         if (!rpnquery)
 840         {
 841             size_t off;
 842             const char *pqf_msg;
 843             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 844             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 845                     pqf_msg, code);
 846             srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 847         }
 848         else
 849         {
 850             query_result->which = Z_Query_type_1;
 851             query_result->u.type_1 = rpnquery;
 852         }
 853         yaz_pqf_destroy(pp);
 854     }
 855     cql_parser_destroy(cp);
 856     wrbuf_destroy(rpn_buf);
 857     return srw_errcode;
 858 }
 859
 860 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 861                         Z_AttributesPlusTerm *result)
 862 {
 863     Z_Query query;
 864     Z_RPNQuery *rpn;
 865     char *sortkeys = 0;
 866     int srw_error = cql2pqf(odr, cql, ct, &query, &sortkeys);
 867     if (srw_error)
 868         return srw_error;
 869     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 870         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* bad query type */
 871     rpn = query.u.type_1;
 872     if (!rpn->RPNStructure)
 873         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be structure */
 874     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 875         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be simple */
 876     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 877         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be be attributes + term */
 878     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 879            sizeof(*result));
 880     return 0;
 881 }
 882
 883
 884 static int ccl2pqf(ODR odr, const Odr_oct *ccl, CCL_bibset bibset,
 885                    bend_search_rr *bsrr)
 886 {
 887     char *ccl0;
 888     struct ccl_rpn_node *node;
 889     int errcode, pos;
 890
 891     ccl0 = odr_strdupn(odr, (char*) ccl->buf, ccl->len);
 892     if ((node = ccl_find_str(bibset, ccl0, &errcode, &pos)) == 0)
 893     {
 894         bsrr->errstring = (char*) ccl_err_msg(errcode);
 895         return YAZ_SRW_QUERY_SYNTAX_ERROR;    /* Query syntax error */
 896     }
 897
 898     bsrr->query->which = Z_Query_type_1;
 899     bsrr->query->u.type_1 = ccl_rpn_query(odr, node);
 900     return 0;
 901 }
 902
 903 static void srw_bend_search(association *assoc,
 904                             Z_SRW_PDU *sr,
 905                             Z_SRW_PDU *res,
 906                             int *http_code)
 907 {
 908     Z_SRW_searchRetrieveResponse *srw_res = res->u.response;
 909     int srw_error = 0;
 910     Z_External *ext;
 911     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 912
 913     *http_code = 200;
 914     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 915     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 916     if (srw_res->num_diagnostics == 0 && assoc->init)
 917     {
 918         bend_search_rr rr;
 919         rr.setname = "default";
 920         rr.replace_set = 1;
 921         rr.num_bases = 1;
 922         rr.basenames = &srw_req->database;
 923         rr.referenceId = 0;
 924         rr.srw_sortKeys = 0;
 925         rr.srw_setname = 0;
 926         rr.srw_setnameIdleTime = 0;
 927         rr.estimated_hit_count = 0;
 928         rr.partial_resultset = 0;
 929         rr.query = (Z_Query *) odr_malloc(assoc->decode, sizeof(*rr.query));
 930         rr.query->u.type_1 = 0;
 931         rr.extra_args = sr->extra_args;
 932         rr.extra_response_data = 0;
 933         rr.present_number = srw_req->maximumRecords ?
 934             *srw_req->maximumRecords : 0;
 935
 936         if (!srw_req->queryType || !strcmp(srw_req->queryType, "cql"))
 937         {
 938             if (assoc->server && assoc->server->cql_transform)
 939             {
 940                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query,
 941                                           assoc->server->cql_transform,
 942                                           rr.query,
 943                                           &rr.srw_sortKeys);
 944
 945                 if (srw_errcode)
 946                 {
 947                     yaz_add_srw_diagnostic(assoc->encode,
 948                                            &srw_res->diagnostics,
 949                                            &srw_res->num_diagnostics,
 950                                            srw_errcode, 0);
 951                 }
 952             }
 953             else
 954             {
 955                 /* CQL query to backend. Wrap it - Z39.50 style */
 956                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 957                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 958                                                         "1.2.840.10003.16.2");
 959                 ext->indirect_reference = 0;
 960                 ext->descriptor = 0;
 961                 ext->which = Z_External_CQL;
 962                 ext->u.cql = srw_req->query;
 963
 964                 rr.query->which = Z_Query_type_104;
 965                 rr.query->u.type_104 =  ext;
 966             }
 967         }
 968         else if (!strcmp(srw_req->queryType, "pqf"))
 969         {
 970             Z_RPNQuery *RPNquery;
 971             YAZ_PQF_Parser pqf_parser;
 972
 973             pqf_parser = yaz_pqf_create();
 974
 975             RPNquery = yaz_pqf_parse(pqf_parser, assoc->decode, srw_req->query);
 976             if (!RPNquery)
 977             {
 978                 const char *pqf_msg;
 979                 size_t off;
 980                 int code = yaz_pqf_error(pqf_parser, &pqf_msg, &off);
 981                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 982                         code, pqf_msg, (long) off);
 983                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 984             }
 985
 986             rr.query->which = Z_Query_type_1;
 987             rr.query->u.type_1 =  RPNquery;
 988
 989             yaz_pqf_destroy(pqf_parser);
 990         }
 991         else
 992         {
 993             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 994                                    &srw_res->num_diagnostics,
 995                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 996         }
 997         if (rr.query->u.type_1)
 998         {
 999             rr.stream = assoc->encode;
1000             rr.decode = assoc->decode;
1001             rr.print = assoc->print;
1002             if (srw_req->sort.sortKeys)
1003                 rr.srw_sortKeys = odr_strdup(assoc->encode,
1004                                              srw_req->sort.sortKeys);
1005             rr.association = assoc;
1006             rr.hits = 0;
1007             rr.errcode = 0;
1008             rr.errstring = 0;
1009             rr.search_info = 0;
1010             rr.search_input = 0;
1011             yaz_log_zquery_level(log_requestdetail,rr.query);
1012
1013             (assoc->init->bend_search)(assoc->backend, &rr);
1014             if (rr.errcode)
1015             {
1016                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1017                 {
1018                     *http_code = 404;
1019                 }
1020                 else
1021                 {
1022                     srw_error = yaz_diag_bib1_to_srw(rr.errcode);
1023                     yaz_add_srw_diagnostic(assoc->encode,
1024                                            &srw_res->diagnostics,
1025                                            &srw_res->num_diagnostics,
1026                                            srw_error, rr.errstring);
1027                 }
1028             }
1029             else
1030             {
1031                 int number = srw_req->maximumRecords ?
1032                     odr_int_to_int(*srw_req->maximumRecords) : 0;
1033                 int start = srw_req->startRecord ?
1034                     odr_int_to_int(*srw_req->startRecord) : 1;
1035
1036                 yaz_log(log_requestdetail, "Request to pack %d+%d out of "
1037                         ODR_INT_PRINTF,
1038                         start, number, rr.hits);
1039
1040                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
1041                 if (rr.srw_setname)
1042                 {
1043                     srw_res->resultSetId =
1044                         odr_strdup(assoc->encode, rr.srw_setname );
1045                     srw_res->resultSetIdleTime =
1046                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
1047                 }
1048
1049                 if (start > rr.hits || start < 1)
1050                 {
1051                     /* if hits<=0 and start=1 we don't return a diagnostic */
1052                     if (start != 1)
1053                         yaz_add_srw_diagnostic(
1054                             assoc->encode,
1055                             &srw_res->diagnostics, &srw_res->num_diagnostics,
1056                             YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1057                 }
1058                 else if (number > 0)
1059                 {
1060                     int i;
1061                     int ok = 1;
1062                     if (start + number > rr.hits)
1063                         number = odr_int_to_int(rr.hits) - start + 1;
1064
1065                     /* Call bend_present if defined */
1066                     if (assoc->init->bend_present)
1067                     {
1068                         bend_present_rr *bprr = (bend_present_rr*)
1069                             odr_malloc(assoc->decode, sizeof(*bprr));
1070                         bprr->setname = "default";
1071                         bprr->start = start;
1072                         bprr->number = number;
1073                         if (srw_req->recordSchema)
1074                         {
1075                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1076                                                                             sizeof(*bprr->comp));
1077                             bprr->comp->which = Z_RecordComp_simple;
1078                             bprr->comp->u.simple = (Z_ElementSetNames *)
1079                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1080                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1081                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1082                         }
1083                         else
1084                         {
1085                             bprr->comp = 0;
1086                         }
1087                         bprr->stream = assoc->encode;
1088                         bprr->referenceId = 0;
1089                         bprr->print = assoc->print;
1090                         bprr->association = assoc;
1091                         bprr->errcode = 0;
1092                         bprr->errstring = NULL;
1093                         (*assoc->init->bend_present)(assoc->backend, bprr);
1094
1095                         if (bprr->errcode)
1096                         {
1097                             srw_error = yaz_diag_bib1_to_srw(bprr->errcode);
1098                             yaz_add_srw_diagnostic(assoc->encode,
1099                                                    &srw_res->diagnostics,
1100                                                    &srw_res->num_diagnostics,
1101                                                    srw_error, bprr->errstring);
1102                             ok = 0;
1103                         }
1104                     }
1105
1106                     if (ok)
1107                     {
1108                         int j = 0;
1109                         int packing = Z_SRW_recordPacking_string;
1110                         if (srw_req->recordPacking)
1111                         {
1112                             packing =
1113                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1114                             if (packing == -1)
1115                                 packing = Z_SRW_recordPacking_string;
1116                         }
1117                         srw_res->records = (Z_SRW_record *)
1118                             odr_malloc(assoc->encode,
1119                                        number * sizeof(*srw_res->records));
1120
1121                         srw_res->extra_records = (Z_SRW_extra_record **)
1122                             odr_malloc(assoc->encode,
1123                                        number*sizeof(*srw_res->extra_records));
1124
1125                         for (i = 0; i<number; i++)
1126                         {
1127                             int errcode;
1128                             int last_in_set = 0;
1129                             const char *addinfo = 0;
1130
1131                             srw_res->records[j].recordPacking = packing;
1132                             srw_res->records[j].recordData_buf = 0;
1133                             srw_res->extra_records[j] = 0;
1134                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1135                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1136                                                      srw_res->records + j,
1137                                                      &addinfo, &last_in_set);
1138                             if (errcode)
1139                             {
1140                                 yaz_add_srw_diagnostic(assoc->encode,
1141                                                        &srw_res->diagnostics,
1142                                                        &srw_res->num_diagnostics,
1143                                                        yaz_diag_bib1_to_srw(errcode),
1144                                                        addinfo);
1145
1146                                 break;
1147                             }
1148                             if (srw_res->records[j].recordData_buf)
1149                                 j++;
1150                             if (last_in_set)
1151                                 break;
1152                         }
1153                         srw_res->num_records = j;
1154                         if (!j)
1155                             srw_res->records = 0;
1156                     }
1157                 }
1158                 if (rr.extra_response_data)
1159                 {
1160                     res->extraResponseData_buf = rr.extra_response_data;
1161                     res->extraResponseData_len = strlen(rr.extra_response_data);
1162                 }
1163                 if (strcmp(res->srw_version, "2.") > 0)
1164                 {
1165                     if (rr.estimated_hit_count)
1166                         srw_res->resultCountPrecision =
1167                             odr_strdup(assoc->encode, "estimate");
1168                     else if (rr.partial_resultset)
1169                         srw_res->resultCountPrecision =
1170                             odr_strdup(assoc->encode, "minimum");
1171                     else
1172                         srw_res->resultCountPrecision =
1173                             odr_strdup(assoc->encode, "exact");
1174                 }
1175                 else if (rr.estimated_hit_count || rr.partial_resultset)
1176                 {
1177                     yaz_add_srw_diagnostic(
1178                         assoc->encode,
1179                         &srw_res->diagnostics,
1180                         &srw_res->num_diagnostics,
1181                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1182                         0);
1183                 }
1184             }
1185         }
1186     }
1187     if (log_request)
1188     {
1189         WRBUF wr = wrbuf_alloc();
1190
1191         wrbuf_printf(wr, "SRWSearch %s ", srw_req->database);
1192         if (srw_res->num_diagnostics)
1193             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1194         else if (*http_code != 200)
1195             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1196         else if (srw_res->numberOfRecords)
1197         {
1198             wrbuf_printf(wr, "OK " ODR_INT_PRINTF,
1199                          (srw_res->numberOfRecords ?
1200                           *srw_res->numberOfRecords : 0));
1201         }
1202         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+%d",
1203                      (srw_res->resultSetId ?
1204                       srw_res->resultSetId : "-"),
1205                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1206                      srw_res->num_records);
1207         yaz_log(log_request, "%s %s: %s", wrbuf_cstr(wr), srw_req->queryType,
1208                 srw_req->query);
1209         wrbuf_destroy(wr);
1210     }
1211 }
1212
1213 static char *srw_bend_explain_default(bend_explain_rr *rr)
1214 {
1215 #if YAZ_HAVE_XML2
1216     xmlNodePtr ptr = (xmlNode *) rr->server_node_ptr;
1217     if (!ptr)
1218         return 0;
1219     for (ptr = ptr->children; ptr; ptr = ptr->next)
1220     {
1221         if (ptr->type != XML_ELEMENT_NODE)
1222             continue;
1223         if (!strcmp((const char *) ptr->name, "explain"))
1224         {
1225             int len;
1226             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1227             xmlChar *buf_out;
1228             char *content;
1229
1230             ptr = xmlCopyNode(ptr, 1);
1231
1232             xmlDocSetRootElement(doc, ptr);
1233
1234             xmlDocDumpMemory(doc, &buf_out, &len);
1235             content = (char*) odr_malloc(rr->stream, 1+len);
1236             memcpy(content, buf_out, len);
1237             content[len] = '\0';
1238
1239             xmlFree(buf_out);
1240             xmlFreeDoc(doc);
1241             rr->explain_buf = content;
1242             return 0;
1243         }
1244     }
1245 #endif
1246     return 0;
1247 }
1248
1249 static void srw_bend_explain(association *assoc,
1250                              Z_SRW_PDU *sr,
1251                              Z_SRW_explainResponse *srw_res,
1252                              int *http_code)
1253 {
1254     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1255     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1256     *http_code = 404;
1257     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1258     if (assoc->init)
1259     {
1260         bend_explain_rr rr;
1261
1262         rr.stream = assoc->encode;
1263         rr.decode = assoc->decode;
1264         rr.print = assoc->print;
1265         rr.explain_buf = 0;
1266         rr.database = srw_req->database;
1267         if (assoc->server)
1268             rr.server_node_ptr = assoc->server->server_node_ptr;
1269         else
1270             rr.server_node_ptr = 0;
1271         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1272         if (assoc->init->bend_explain)
1273             (*assoc->init->bend_explain)(assoc->backend, &rr);
1274         else
1275             srw_bend_explain_default(&rr);
1276
1277         if (rr.explain_buf)
1278         {
1279             int packing = Z_SRW_recordPacking_string;
1280             if (srw_req->recordPacking)
1281             {
1282                 packing =
1283                     yaz_srw_str_to_pack(srw_req->recordPacking);
1284                 if (packing == -1)
1285                     packing = Z_SRW_recordPacking_string;
1286             }
1287             srw_res->record.recordSchema = rr.schema;
1288             srw_res->record.recordPacking = packing;
1289             srw_res->record.recordData_buf = rr.explain_buf;
1290             srw_res->record.recordData_len = strlen(rr.explain_buf);
1291             srw_res->record.recordPosition = 0;
1292             *http_code = 200;
1293         }
1294     }
1295 }
1296
1297 static void srw_bend_scan(association *assoc,
1298                           Z_SRW_PDU *sr,
1299                           Z_SRW_PDU *res,
1300                           int *http_code)
1301 {
1302     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1303     Z_SRW_scanResponse *srw_res = res->u.scan_response;
1304     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1305
1306     *http_code = 200;
1307     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1308     if (srw_res->num_diagnostics == 0 && assoc->init)
1309     {
1310         int step_size = 0;
1311         struct scan_entry *save_entries;
1312
1313         bend_scan_rr *bsrr = (bend_scan_rr *)
1314             odr_malloc(assoc->encode, sizeof(*bsrr));
1315         bsrr->num_bases = 1;
1316         bsrr->basenames = &srw_req->database;
1317
1318         bsrr->num_entries = srw_req->maximumTerms ?
1319             odr_int_to_int(*srw_req->maximumTerms) : 10;
1320         bsrr->term_position = srw_req->responsePosition ?
1321             odr_int_to_int(*srw_req->responsePosition) : 1;
1322
1323         bsrr->errcode = 0;
1324         bsrr->errstring = 0;
1325         bsrr->referenceId = 0;
1326         bsrr->stream = assoc->encode;
1327         bsrr->print = assoc->print;
1328         bsrr->step_size = &step_size;
1329         bsrr->entries = 0;
1330         bsrr->setname = 0;
1331         bsrr->extra_args = sr->extra_args;
1332         bsrr->extra_response_data = 0;
1333
1334         if (bsrr->num_entries > 0)
1335         {
1336             int i;
1337             bsrr->entries = (struct scan_entry *)
1338                 odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1339                            bsrr->num_entries);
1340             for (i = 0; i<bsrr->num_entries; i++)
1341             {
1342                 bsrr->entries[i].term = 0;
1343                 bsrr->entries[i].occurrences = 0;
1344                 bsrr->entries[i].errcode = 0;
1345                 bsrr->entries[i].errstring = 0;
1346                 bsrr->entries[i].display_term = 0;
1347             }
1348         }
1349         save_entries = bsrr->entries;  /* save it so we can compare later */
1350
1351         if (srw_req->queryType && !strcmp(srw_req->queryType, "pqf") &&
1352             assoc->init->bend_scan)
1353         {
1354             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1355
1356             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1357                                       &bsrr->attributeset,
1358                                       srw_req->scanClause);
1359             yaz_pqf_destroy(pqf_parser);
1360             bsrr->scanClause = 0;
1361             ((int (*)(void *, bend_scan_rr *))
1362              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1363         }
1364         else if ((!srw_req->queryType || !strcmp(srw_req->queryType, "cql"))
1365                  && assoc->init->bend_scan && assoc->server
1366                  && assoc->server->cql_transform)
1367         {
1368             int srw_error;
1369             bsrr->scanClause = 0;
1370             bsrr->attributeset = 0;
1371             bsrr->term = (Z_AttributesPlusTerm *)
1372                 odr_malloc(assoc->decode, sizeof(*bsrr->term));
1373             srw_error = cql2pqf_scan(assoc->encode,
1374                                      srw_req->scanClause,
1375                                      assoc->server->cql_transform,
1376                                      bsrr->term);
1377             if (srw_error)
1378                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1379                                        &srw_res->num_diagnostics,
1380                                        srw_error, 0);
1381             else
1382             {
1383                 ((int (*)(void *, bend_scan_rr *))
1384                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1385             }
1386         }
1387         else if ((!srw_req->queryType || !strcmp(srw_req->queryType, "cql"))
1388                  && assoc->init->bend_srw_scan)
1389         {
1390             bsrr->term = 0;
1391             bsrr->attributeset = 0;
1392             bsrr->scanClause = srw_req->scanClause;
1393             ((int (*)(void *, bend_scan_rr *))
1394              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1395         }
1396         else
1397         {
1398             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1399                                    &srw_res->num_diagnostics,
1400                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1401         }
1402         if (bsrr->extra_response_data)
1403         {
1404             res->extraResponseData_buf = bsrr->extra_response_data;
1405             res->extraResponseData_len = strlen(bsrr->extra_response_data);
1406         }
1407         if (bsrr->errcode)
1408         {
1409             int srw_error;
1410             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1411             {
1412                 *http_code = 404;
1413                 return;
1414             }
1415             srw_error = yaz_diag_bib1_to_srw(bsrr->errcode);
1416
1417             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1418                                    &srw_res->num_diagnostics,
1419                                    srw_error, bsrr->errstring);
1420         }
1421         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1422         {
1423             int i;
1424             srw_res->terms = (Z_SRW_scanTerm*)
1425                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1426                            bsrr->num_entries);
1427
1428             srw_res->num_terms =  bsrr->num_entries;
1429             for (i = 0; i<bsrr->num_entries; i++)
1430             {
1431                 Z_SRW_scanTerm *t = srw_res->terms + i;
1432                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1433                 t->numberOfRecords =
1434                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1435                 t->displayTerm = 0;
1436                 if (save_entries == bsrr->entries &&
1437                     bsrr->entries[i].display_term)
1438                 {
1439                     /* the entries was _not_ set by the handler. So it's
1440                        safe to test for new member display_term. It is
1441                        NULL'ed by us.
1442                     */
1443                     t->displayTerm = odr_strdup(assoc->encode,
1444                                                 bsrr->entries[i].display_term);
1445                 }
1446                 t->whereInList = 0;
1447             }
1448         }
1449     }
1450     if (log_request)
1451     {
1452         WRBUF wr = wrbuf_alloc();
1453         wrbuf_printf(wr, "SRWScan %s ", srw_req->database);
1454
1455         if (srw_res->num_diagnostics)
1456             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1457         else if (srw_res->num_terms)
1458             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1459         else
1460             wrbuf_printf(wr, "OK - - ");
1461
1462         wrbuf_printf(wr, ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
1463                      (srw_req->responsePosition ?
1464                       *srw_req->responsePosition : 1),
1465                      (srw_req->maximumTerms ?
1466                       *srw_req->maximumTerms : 1));
1467         /* there is no step size in SRU/W ??? */
1468         wrbuf_printf(wr, "%s: %s ", srw_req->queryType, srw_req->scanClause);
1469         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1470         wrbuf_destroy(wr);
1471     }
1472
1473 }
1474
1475 static void srw_bend_update(association *assoc,
1476                             Z_SRW_PDU *sr,
1477                             Z_SRW_updateResponse *srw_res,
1478                             int *http_code)
1479 {
1480     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1481     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1482     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1483     *http_code = 404;
1484     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1485     if (assoc->init)
1486     {
1487         bend_update_rr rr;
1488         Z_SRW_extra_record *extra = srw_req->extra_record;
1489
1490         rr.stream = assoc->encode;
1491         rr.print = assoc->print;
1492         rr.num_bases = 1;
1493         rr.basenames = &srw_req->database;
1494         rr.operation = srw_req->operation;
1495         rr.operation_status = "failed";
1496         rr.record_id = 0;
1497         rr.record_versions = 0;
1498         rr.num_versions = 0;
1499         rr.record_packing = "string";
1500         rr.record_schema = 0;
1501         rr.record_data = 0;
1502         rr.extra_record_data = 0;
1503         rr.extra_request_data = 0;
1504         rr.extra_response_data = 0;
1505         rr.uri = 0;
1506         rr.message = 0;
1507         rr.details = 0;
1508
1509         *http_code = 200;
1510         if (rr.operation == 0)
1511         {
1512             yaz_add_sru_update_diagnostic(
1513                 assoc->encode, &srw_res->diagnostics,
1514                 &srw_res->num_diagnostics,
1515                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1516                 "action" );
1517             return;
1518         }
1519         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1520         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1521         if (!strcmp( rr.operation, "delete"))
1522         {
1523             if (srw_req->record && !srw_req->record->recordSchema)
1524             {
1525                 rr.record_schema = odr_strdup(
1526                     assoc->encode,
1527                     srw_req->record->recordSchema);
1528             }
1529             if (srw_req->record)
1530             {
1531                 rr.record_data = odr_strdupn(
1532                     assoc->encode,
1533                     srw_req->record->recordData_buf,
1534                     srw_req->record->recordData_len );
1535             }
1536             if (extra && extra->extraRecordData_len)
1537             {
1538                 rr.extra_record_data = odr_strdupn(
1539                     assoc->encode,
1540                     extra->extraRecordData_buf,
1541                     extra->extraRecordData_len );
1542             }
1543             if (srw_req->recordId)
1544                 rr.record_id = srw_req->recordId;
1545             else if (extra && extra->recordIdentifier)
1546                 rr.record_id = extra->recordIdentifier;
1547         }
1548         else if (!strcmp(rr.operation, "replace"))
1549         {
1550             if (srw_req->recordId)
1551                 rr.record_id = srw_req->recordId;
1552             else if (extra && extra->recordIdentifier)
1553                 rr.record_id = extra->recordIdentifier;
1554             else
1555             {
1556                 yaz_add_sru_update_diagnostic(
1557                     assoc->encode, &srw_res->diagnostics,
1558                     &srw_res->num_diagnostics,
1559                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1560                     "recordIdentifier");
1561             }
1562             if (!srw_req->record)
1563             {
1564                 yaz_add_sru_update_diagnostic(
1565                     assoc->encode, &srw_res->diagnostics,
1566                     &srw_res->num_diagnostics,
1567                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1568                     "record");
1569             }
1570             else
1571             {
1572                 if (srw_req->record->recordSchema)
1573                     rr.record_schema = odr_strdup(
1574                         assoc->encode, srw_req->record->recordSchema);
1575                 if (srw_req->record->recordData_len )
1576                 {
1577                     rr.record_data = odr_strdupn(assoc->encode,
1578                                                  srw_req->record->recordData_buf,
1579                                                  srw_req->record->recordData_len );
1580                 }
1581                 else
1582                 {
1583                     yaz_add_sru_update_diagnostic(
1584                         assoc->encode, &srw_res->diagnostics,
1585                         &srw_res->num_diagnostics,
1586                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1587                         "recordData" );
1588                 }
1589             }
1590             if (extra && extra->extraRecordData_len)
1591             {
1592                 rr.extra_record_data = odr_strdupn(
1593                     assoc->encode,
1594                     extra->extraRecordData_buf,
1595                     extra->extraRecordData_len );
1596             }
1597         }
1598         else if (!strcmp(rr.operation, "insert"))
1599         {
1600             if (srw_req->recordId)
1601                 rr.record_id = srw_req->recordId;
1602             else if (extra)
1603                 rr.record_id = extra->recordIdentifier;
1604
1605             if (srw_req->record)
1606             {
1607                 if (srw_req->record->recordSchema)
1608                     rr.record_schema = odr_strdup(
1609                         assoc->encode, srw_req->record->recordSchema);
1610
1611                 if (srw_req->record->recordData_len)
1612                     rr.record_data = odr_strdupn(
1613                         assoc->encode,
1614                         srw_req->record->recordData_buf,
1615                         srw_req->record->recordData_len );
1616             }
1617             if (extra && extra->extraRecordData_len)
1618             {
1619                 rr.extra_record_data = odr_strdupn(
1620                     assoc->encode,
1621                     extra->extraRecordData_buf,
1622                     extra->extraRecordData_len );
1623             }
1624         }
1625         else
1626             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1627                                           &srw_res->num_diagnostics,
1628                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1629                                           rr.operation );
1630
1631         if (srw_req->record)
1632         {
1633             const char *pack_str =
1634                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1635             if (pack_str)
1636                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1637         }
1638
1639         if (srw_req->num_recordVersions)
1640         {
1641             rr.record_versions = srw_req->recordVersions;
1642             rr.num_versions = srw_req->num_recordVersions;
1643         }
1644         if (srw_req->extraRequestData_len)
1645         {
1646             rr.extra_request_data = odr_strdupn(assoc->encode,
1647                                                 srw_req->extraRequestData_buf,
1648                                                 srw_req->extraRequestData_len );
1649         }
1650         if (srw_res->num_diagnostics == 0)
1651         {
1652             if ( assoc->init->bend_srw_update)
1653                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1654             else
1655                 yaz_add_sru_update_diagnostic(
1656                     assoc->encode, &srw_res->diagnostics,
1657                     &srw_res->num_diagnostics,
1658                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1659                     "No Update backend handler");
1660         }
1661
1662         if (rr.uri)
1663             yaz_add_srw_diagnostic_uri(assoc->encode,
1664                                        &srw_res->diagnostics,
1665                                        &srw_res->num_diagnostics,
1666                                        rr.uri,
1667                                        rr.message,
1668                                        rr.details);
1669         srw_res->recordId = rr.record_id;
1670         srw_res->operationStatus = rr.operation_status;
1671         srw_res->recordVersions = rr.record_versions;
1672         srw_res->num_recordVersions = rr.num_versions;
1673         if (srw_res->extraResponseData_len)
1674         {
1675             srw_res->extraResponseData_buf = rr.extra_response_data;
1676             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1677         }
1678         if (srw_res->num_diagnostics == 0 && rr.record_data)
1679         {
1680             srw_res->record = yaz_srw_get_record(assoc->encode);
1681             srw_res->record->recordSchema = rr.record_schema;
1682             if (rr.record_packing)
1683             {
1684                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1685
1686                 if (pack == -1)
1687                 {
1688                     pack = Z_SRW_recordPacking_string;
1689                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1690                             rr.record_packing);
1691                 }
1692                 srw_res->record->recordPacking = pack;
1693             }
1694             srw_res->record->recordData_buf = rr.record_data;
1695             srw_res->record->recordData_len = strlen(rr.record_data);
1696             if (rr.extra_record_data)
1697             {
1698                 Z_SRW_extra_record *ex =
1699                     yaz_srw_get_extra_record(assoc->encode);
1700                 srw_res->extra_record = ex;
1701                 ex->extraRecordData_buf = rr.extra_record_data;
1702                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1703             }
1704         }
1705     }
1706 }
1707
1708 /* check if path is OK (1); BAD (0) */
1709 static int check_path(const char *path)
1710 {
1711     if (*path != '/')
1712         return 0;
1713     if (strstr(path, ".."))
1714         return 0;
1715     return 1;
1716 }
1717
1718 static char *read_file(const char *fname, ODR o, size_t *sz)
1719 {
1720     char *buf;
1721     FILE *inf = fopen(fname, "rb");
1722     if (!inf)
1723         return 0;
1724
1725     fseek(inf, 0L, SEEK_END);
1726     *sz = ftell(inf);
1727     rewind(inf);
1728     buf = (char *) odr_malloc(o, *sz);
1729     if (fread(buf, 1, *sz, inf) != *sz)
1730         yaz_log(YLOG_WARN|YLOG_ERRNO, "short read %s", fname);
1731     fclose(inf);
1732     return buf;
1733 }
1734
1735 static void process_http_request(association *assoc, request *req)
1736 {
1737     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1738     ODR o = assoc->encode;
1739     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1740     Z_SRW_PDU *sr = 0;
1741     Z_SOAP *soap_package = 0;
1742     Z_GDU *p = 0;
1743     char *charset = 0;
1744     Z_HTTP_Response *hres = 0;
1745     int keepalive = 1;
1746     const char *stylesheet = 0; /* for now .. set later */
1747     Z_SRW_diagnostic *diagnostic = 0;
1748     int num_diagnostic = 0;
1749     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1750
1751     yaz_log(log_request, "%s %s HTTP/%s", hreq->method, hreq->path, hreq->version);
1752     if (!control_association(assoc, host, 0))
1753     {
1754         p = z_get_HTTP_Response(o, 404);
1755         r = 1;
1756     }
1757     if (r == 2 && assoc->server && assoc->server->docpath
1758         && hreq->path[0] == '/'
1759         &&
1760         /* check if path is a proper prefix of documentroot */
1761         strncmp(hreq->path+1, assoc->server->docpath,
1762                 strlen(assoc->server->docpath))
1763         == 0)
1764     {
1765         if (!check_path(hreq->path))
1766         {
1767             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1768             p = z_get_HTTP_Response(o, 404);
1769         }
1770         else
1771         {
1772             size_t content_size = 0;
1773             char *content_buf = read_file(hreq->path+1, o, &content_size);
1774             if (!content_buf)
1775             {
1776                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1777                 p = z_get_HTTP_Response(o, 404);
1778             }
1779             else
1780             {
1781                 const char *ctype = 0;
1782                 yaz_mime_types types = yaz_mime_types_create();
1783
1784                 yaz_mime_types_add(types, "xsl", "application/xml");
1785                 yaz_mime_types_add(types, "xml", "application/xml");
1786                 yaz_mime_types_add(types, "css", "text/css");
1787                 yaz_mime_types_add(types, "html", "text/html");
1788                 yaz_mime_types_add(types, "htm", "text/html");
1789                 yaz_mime_types_add(types, "txt", "text/plain");
1790                 yaz_mime_types_add(types, "js", "application/x-javascript");
1791
1792                 yaz_mime_types_add(types, "gif", "image/gif");
1793                 yaz_mime_types_add(types, "png", "image/png");
1794                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1795                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1796
1797                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1798                 if (!ctype)
1799                 {
1800                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1801                     p = z_get_HTTP_Response(o, 404);
1802                 }
1803                 else
1804                 {
1805                     p = z_get_HTTP_Response(o, 200);
1806                     hres = p->u.HTTP_Response;
1807                     hres->content_buf = content_buf;
1808                     hres->content_len = content_size;
1809                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1810                 }
1811                 yaz_mime_types_destroy(types);
1812             }
1813         }
1814         r = 1;
1815     }
1816
1817     if (r == 2)
1818     {
1819         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1820         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1821     }
1822     if (r == 2)  /* not taken */
1823     {
1824         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1825                            &diagnostic, &num_diagnostic);
1826         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1827     }
1828     if (r == 0)  /* decode SRW/SRU OK .. */
1829     {
1830         int http_code = 200;
1831         if (sr->which == Z_SRW_searchRetrieve_request)
1832         {
1833             Z_SRW_PDU *res =
1834                 yaz_srw_get_pdu(assoc->encode, Z_SRW_searchRetrieve_response,
1835                                 sr->srw_version);
1836             stylesheet = sr->u.request->stylesheet;
1837             if (num_diagnostic)
1838             {
1839                 res->u.response->diagnostics = diagnostic;
1840                 res->u.response->num_diagnostics = num_diagnostic;
1841             }
1842             else
1843             {
1844                 srw_bend_search(assoc, sr, res, &http_code);
1845             }
1846             if (http_code == 200)
1847                 soap_package->u.generic->p = res;
1848         }
1849         else if (sr->which == Z_SRW_explain_request)
1850         {
1851             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_explain_response,
1852                                              sr->srw_version);
1853             stylesheet = sr->u.explain_request->stylesheet;
1854             if (num_diagnostic)
1855             {
1856                 res->u.explain_response->diagnostics = diagnostic;
1857                 res->u.explain_response->num_diagnostics = num_diagnostic;
1858             }
1859             srw_bend_explain(assoc, sr, res->u.explain_response, &http_code);
1860             if (http_code == 200)
1861                 soap_package->u.generic->p = res;
1862         }
1863         else if (sr->which == Z_SRW_scan_request)
1864         {
1865             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_scan_response,
1866                                              sr->srw_version);
1867             stylesheet = sr->u.scan_request->stylesheet;
1868             if (num_diagnostic)
1869             {
1870                 res->u.scan_response->diagnostics = diagnostic;
1871                 res->u.scan_response->num_diagnostics = num_diagnostic;
1872             }
1873             srw_bend_scan(assoc, sr, res, &http_code);
1874             if (http_code == 200)
1875                 soap_package->u.generic->p = res;
1876         }
1877         else if (sr->which == Z_SRW_update_request)
1878         {
1879             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_update_response,
1880                                              sr->srw_version);
1881             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1882             if (num_diagnostic)
1883             {
1884                 res->u.update_response->diagnostics = diagnostic;
1885                 res->u.update_response->num_diagnostics = num_diagnostic;
1886             }
1887             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1888             srw_bend_update(assoc, sr, res->u.update_response, &http_code);
1889             if (http_code == 200)
1890                 soap_package->u.generic->p = res;
1891         }
1892         else
1893         {
1894             yaz_log(log_request, "SOAP ERROR");
1895             /* FIXME - what error, what query */
1896             http_code = 500;
1897             z_soap_error(assoc->encode, soap_package,
1898                          "SOAP-ENV:Client", "Bad method", 0);
1899         }
1900         if (http_code == 200 || http_code == 500)
1901         {
1902             static Z_SOAP_Handler soap_handlers[4] = {
1903 #if YAZ_HAVE_XML2
1904                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1905                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1906                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1907 #endif
1908                 {0, 0, 0}
1909             };
1910             char ctype[80];
1911             p = z_get_HTTP_Response(o, 200);
1912             hres = p->u.HTTP_Response;
1913
1914             if (!stylesheet && assoc->server)
1915                 stylesheet = assoc->server->stylesheet;
1916
1917             /* empty stylesheet means NO stylesheet */
1918             if (stylesheet && *stylesheet == '\0')
1919                 stylesheet = 0;
1920
1921             z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1922                                  &hres->content_buf, &hres->content_len,
1923                                  soap_handlers, charset, stylesheet);
1924             hres->code = http_code;
1925
1926             strcpy(ctype, "text/xml");
1927             if (charset && strlen(charset) < sizeof(ctype)-30)
1928             {
1929                 strcat(ctype, "; charset=");
1930                 strcat(ctype, charset);
1931             }
1932             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1933         }
1934         else
1935             p = z_get_HTTP_Response(o, http_code);
1936     }
1937
1938     if (p == 0)
1939         p = z_get_HTTP_Response(o, 500);
1940     hres = p->u.HTTP_Response;
1941     if (!strcmp(hreq->version, "1.0"))
1942     {
1943         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1944         if (v && !strcmp(v, "Keep-Alive"))
1945             keepalive = 1;
1946         else
1947             keepalive = 0;
1948         hres->version = "1.0";
1949     }
1950     else
1951     {
1952         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1953         if (v && !strcmp(v, "close"))
1954             keepalive = 0;
1955         else
1956             keepalive = 1;
1957         hres->version = "1.1";
1958     }
1959     if (!keepalive || !assoc->last_control->keepalive)
1960     {
1961         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1962         assoc->state = ASSOC_DEAD;
1963         assoc->cs_get_mask = 0;
1964     }
1965     else
1966     {
1967         int t;
1968         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1969
1970         if (alive && yaz_isdigit(*(const unsigned char *) alive))
1971             t = atoi(alive);
1972         else
1973             t = 15;
1974         if (t < 0 || t > 3600)
1975             t = 3600;
1976         iochan_settimeout(assoc->client_chan,t);
1977         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1978     }
1979     process_gdu_response(assoc, req, p);
1980 }
1981
1982 static void process_gdu_request(association *assoc, request *req)
1983 {
1984     if (req->gdu_request->which == Z_GDU_Z3950)
1985     {
1986         char *msg = 0;
1987         req->apdu_request = req->gdu_request->u.z3950;
1988         if (process_z_request(assoc, req, &msg) < 0)
1989             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1990     }
1991     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1992         process_http_request(assoc, req);
1993     else
1994     {
1995         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1996     }
1997 }
1998
1999 /*
2000  * Initiate request processing.
2001  */
2002 static int process_z_request(association *assoc, request *req, char **msg)
2003 {
2004     Z_APDU *res;
2005     int retval;
2006
2007     *msg = "Unknown Error";
2008     assert(req && req->state == REQUEST_IDLE);
2009     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
2010     {
2011         *msg = "Missing InitRequest";
2012         return -1;
2013     }
2014     switch (req->apdu_request->which)
2015     {
2016     case Z_APDU_initRequest:
2017         res = process_initRequest(assoc, req); break;
2018     case Z_APDU_searchRequest:
2019         res = process_searchRequest(assoc, req); break;
2020     case Z_APDU_presentRequest:
2021         res = process_presentRequest(assoc, req); break;
2022     case Z_APDU_scanRequest:
2023         if (assoc->init->bend_scan)
2024             res = process_scanRequest(assoc, req);
2025         else
2026         {
2027             *msg = "Cannot handle Scan APDU";
2028             return -1;
2029         }
2030         break;
2031     case Z_APDU_extendedServicesRequest:
2032         if (assoc->init->bend_esrequest)
2033             res = process_ESRequest(assoc, req);
2034         else
2035         {
2036             *msg = "Cannot handle Extended Services APDU";
2037             return -1;
2038         }
2039         break;
2040     case Z_APDU_sortRequest:
2041         if (assoc->init->bend_sort)
2042             res = process_sortRequest(assoc, req);
2043         else
2044         {
2045             *msg = "Cannot handle Sort APDU";
2046             return -1;
2047         }
2048         break;
2049     case Z_APDU_close:
2050         process_close(assoc, req);
2051         return 0;
2052     case Z_APDU_deleteResultSetRequest:
2053         if (assoc->init->bend_delete)
2054             res = process_deleteRequest(assoc, req);
2055         else
2056         {
2057             *msg = "Cannot handle Delete APDU";
2058             return -1;
2059         }
2060         break;
2061     case Z_APDU_segmentRequest:
2062         if (assoc->init->bend_segment)
2063         {
2064             res = process_segmentRequest(assoc, req);
2065         }
2066         else
2067         {
2068             *msg = "Cannot handle Segment APDU";
2069             return -1;
2070         }
2071         break;
2072     case Z_APDU_triggerResourceControlRequest:
2073         return 0;
2074     default:
2075         *msg = "Bad APDU received";
2076         return -1;
2077     }
2078     if (res)
2079     {
2080         yaz_log(YLOG_DEBUG, "  result immediately available");
2081         retval = process_z_response(assoc, req, res);
2082     }
2083     else
2084     {
2085         yaz_log(YLOG_DEBUG, "  result unavailable");
2086         retval = -1;
2087     }
2088     return retval;
2089 }
2090
2091 /*
2092  * Encode response, and transfer the request structure to the outgoing queue.
2093  */
2094 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2095 {
2096     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2097
2098     if (assoc->print)
2099     {
2100         if (!z_GDU(assoc->print, &res, 0, 0))
2101             yaz_log(YLOG_WARN, "ODR print error: %s",
2102                 odr_errmsg(odr_geterror(assoc->print)));
2103         odr_reset(assoc->print);
2104     }
2105     if (!z_GDU(assoc->encode, &res, 0, 0))
2106     {
2107         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2108                 odr_errmsg(odr_geterror(assoc->decode)),
2109                 odr_getelement(assoc->decode));
2110         return -1;
2111     }
2112     req->response = odr_getbuf(assoc->encode, &req->len_response,
2113         &req->size_response);
2114     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2115     odr_reset(assoc->encode);
2116     req->state = REQUEST_IDLE;
2117     request_enq(&assoc->outgoing, req);
2118     /* turn the work over to the ir_session handler */
2119     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2120     assoc->cs_put_mask = EVENT_OUTPUT;
2121     /* Is there more work to be done? give that to the input handler too */
2122     for (;;)
2123     {
2124         req = request_head(&assoc->incoming);
2125         if (req && req->state == REQUEST_IDLE)
2126         {
2127             request_deq(&assoc->incoming);
2128             process_gdu_request(assoc, req);
2129         }
2130         else
2131             break;
2132     }
2133     return 0;
2134 }
2135
2136 /*
2137  * Encode response, and transfer the request structure to the outgoing queue.
2138  */
2139 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2140 {
2141     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*gres));
2142     gres->which = Z_GDU_Z3950;
2143     gres->u.z3950 = res;
2144
2145     return process_gdu_response(assoc, req, gres);
2146 }
2147
2148 static char *get_vhost(Z_OtherInformation *otherInfo)
2149 {
2150     return yaz_oi_get_string_oid(&otherInfo, yaz_oid_userinfo_proxy, 1, 0);
2151 }
2152
2153 /*
2154  * Handle init request.
2155  * At the moment, we don't check the options
2156  * anywhere else in the code - we just try not to do anything that would
2157  * break a naive client. We'll toss 'em into the association block when
2158  * we need them there.
2159  */
2160 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2161 {
2162     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2163     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2164     Z_InitResponse *resp = apdu->u.initResponse;
2165     bend_initresult *binitres;
2166     char options[140];
2167     statserv_options_block *cb = 0;  /* by default no control for backend */
2168
2169     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2170         cb = statserv_getcontrol();  /* got control block for backend */
2171
2172     if (cb && assoc->backend)
2173         (*cb->bend_close)(assoc->backend);
2174
2175     yaz_log(log_requestdetail, "Got initRequest");
2176     if (req->implementationId)
2177         yaz_log(log_requestdetail, "Id:        %s",
2178                 req->implementationId);
2179     if (req->implementationName)
2180         yaz_log(log_requestdetail, "Name:      %s",
2181                 req->implementationName);
2182     if (req->implementationVersion)
2183         yaz_log(log_requestdetail, "Version:   %s",
2184                 req->implementationVersion);
2185
2186     assoc_init_reset(assoc);
2187
2188     assoc->init->auth = req->idAuthentication;
2189     assoc->init->referenceId = req->referenceId;
2190
2191     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2192     {
2193         Z_CharSetandLanguageNegotiation *negotiation =
2194             yaz_get_charneg_record (req->otherInfo);
2195         if (negotiation &&
2196             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2197             assoc->init->charneg_request = negotiation;
2198     }
2199
2200     /* by default named_result_sets is 0 .. Enable it if client asks for it. */
2201     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2202         assoc->init->named_result_sets = 1;
2203
2204     assoc->backend = 0;
2205     if (cb)
2206     {
2207         if (req->implementationVersion)
2208             yaz_log(log_requestdetail, "Config:    %s",
2209                     cb->configname);
2210
2211         iochan_settimeout(assoc->client_chan, cb->idle_timeout);
2212
2213         /* we have a backend control block, so call that init function */
2214         if (!(binitres = (*cb->bend_init)(assoc->init)))
2215         {
2216             yaz_log(YLOG_WARN, "Bad response from backend.");
2217             return 0;
2218         }
2219         assoc->backend = binitres->handle;
2220     }
2221     else
2222     {
2223         /* no backend. return error */
2224         binitres = (bend_initresult *)
2225             odr_malloc(assoc->encode, sizeof(*binitres));
2226         binitres->errstring = 0;
2227         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2228         iochan_settimeout(assoc->client_chan, 10);
2229     }
2230     if ((assoc->init->bend_sort))
2231         yaz_log(YLOG_DEBUG, "Sort handler installed");
2232     if ((assoc->init->bend_search))
2233         yaz_log(YLOG_DEBUG, "Search handler installed");
2234     if ((assoc->init->bend_present))
2235         yaz_log(YLOG_DEBUG, "Present handler installed");
2236     if ((assoc->init->bend_esrequest))
2237         yaz_log(YLOG_DEBUG, "ESRequest handler installed");
2238     if ((assoc->init->bend_delete))
2239         yaz_log(YLOG_DEBUG, "Delete handler installed");
2240     if ((assoc->init->bend_scan))
2241         yaz_log(YLOG_DEBUG, "Scan handler installed");
2242     if ((assoc->init->bend_segment))
2243         yaz_log(YLOG_DEBUG, "Segment handler installed");
2244
2245     resp->referenceId = req->referenceId;
2246     *options = '\0';
2247     /* let's tell the client what we can do */
2248     if (ODR_MASK_GET(req->options, Z_Options_search))
2249     {
2250         ODR_MASK_SET(resp->options, Z_Options_search);
2251         strcat(options, "srch");
2252     }
2253     if (ODR_MASK_GET(req->options, Z_Options_present))
2254     {
2255         ODR_MASK_SET(resp->options, Z_Options_present);
2256         strcat(options, " prst");
2257     }
2258     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2259         assoc->init->bend_delete)
2260     {
2261         ODR_MASK_SET(resp->options, Z_Options_delSet);
2262         strcat(options, " del");
2263     }
2264     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2265         assoc->init->bend_esrequest)
2266     {
2267         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2268         strcat(options, " extendedServices");
2269     }
2270     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets)
2271         && assoc->init->named_result_sets)
2272     {
2273         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2274         strcat(options, " namedresults");
2275     }
2276     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2277     {
2278         ODR_MASK_SET(resp->options, Z_Options_scan);
2279         strcat(options, " scan");
2280     }
2281     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2282     {
2283         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2284         strcat(options, " concurrop");
2285     }
2286     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2287     {
2288         ODR_MASK_SET(resp->options, Z_Options_sort);
2289         strcat(options, " sort");
2290     }
2291
2292     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2293     {
2294         Z_OtherInformationUnit *p0;
2295
2296         if (!assoc->init->charneg_response)
2297         {
2298             if (assoc->init->query_charset)
2299             {
2300                 assoc->init->charneg_response = yaz_set_response_charneg(
2301                     assoc->encode, assoc->init->query_charset, 0,
2302                     assoc->init->records_in_same_charset);
2303             }
2304             else
2305             {
2306                 yaz_log(YLOG_WARN, "default query_charset not defined by backend");
2307             }
2308         }
2309         if (assoc->init->charneg_response
2310             && (p0=yaz_oi_update(&resp->otherInfo, assoc->encode, NULL, 0, 0)))
2311         {
2312             p0->which = Z_OtherInfo_externallyDefinedInfo;
2313             p0->information.externallyDefinedInfo =
2314                 assoc->init->charneg_response;
2315             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2316             strcat(options, " negotiation");
2317         }
2318     }
2319     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2320         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2321
2322     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2323     {
2324         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2325         assoc->version = 1; /* 1 & 2 are equivalent */
2326     }
2327     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2328     {
2329         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2330         assoc->version = 2;
2331     }
2332     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2333     {
2334         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2335         assoc->version = 3;
2336     }
2337
2338     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2339
2340     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2341         assoc->maximumRecordSize = odr_int_to_int(*req->maximumRecordSize);
2342
2343     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2344         assoc->preferredMessageSize = odr_int_to_int(*req->preferredMessageSize);
2345
2346     resp->preferredMessageSize =
2347         odr_intdup(assoc->encode, assoc->preferredMessageSize);
2348     resp->maximumRecordSize =
2349         odr_intdup(assoc->encode, assoc->maximumRecordSize);
2350
2351     resp->implementationId = odr_prepend(assoc->encode,
2352                 assoc->init->implementation_id,
2353                 resp->implementationId);
2354
2355     resp->implementationVersion = odr_prepend(assoc->encode,
2356                 assoc->init->implementation_version,
2357                 resp->implementationVersion);
2358
2359     resp->implementationName = odr_prepend(assoc->encode,
2360                 assoc->init->implementation_name,
2361                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2362
2363     if (binitres->errcode)
2364     {
2365         assoc->state = ASSOC_DEAD;
2366         resp->userInformationField =
2367             init_diagnostics(assoc->encode, binitres->errcode,
2368                              binitres->errstring);
2369         *resp->result = 0;
2370     }
2371     else
2372         assoc->state = ASSOC_UP;
2373
2374     if (log_request)
2375     {
2376         if (!req->idAuthentication)
2377             yaz_log(log_request, "Auth none");
2378         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2379         {
2380             const char *open = req->idAuthentication->u.open;
2381             const char *slash = strchr(open, '/');
2382             int len;
2383             if (slash)
2384                 len = slash - open;
2385             else
2386                 len = strlen(open);
2387                 yaz_log(log_request, "Auth open %.*s", len, open);
2388         }
2389         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2390         {
2391             const char *user = req->idAuthentication->u.idPass->userId;
2392             const char *group = req->idAuthentication->u.idPass->groupId;
2393             yaz_log(log_request, "Auth idPass %s %s",
2394                     user ? user : "-", group ? group : "-");
2395         }
2396         else if (req->idAuthentication->which
2397                  == Z_IdAuthentication_anonymous)
2398         {
2399             yaz_log(log_request, "Auth anonymous");
2400         }
2401         else
2402         {
2403             yaz_log(log_request, "Auth other");
2404         }
2405     }
2406     if (log_request)
2407     {
2408         WRBUF wr = wrbuf_alloc();
2409         wrbuf_printf(wr, "Init ");
2410         if (binitres->errcode)
2411             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2412         else
2413             wrbuf_printf(wr, "OK -");
2414         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2415                      (req->implementationId ? req->implementationId :"-"),
2416                      (req->implementationName ?
2417                       req->implementationName : "-"),
2418                      (req->implementationVersion ?
2419                       req->implementationVersion : "-")
2420             );
2421         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2422         wrbuf_destroy(wr);
2423     }
2424     return apdu;
2425 }
2426
2427 /*
2428  * Set the specified `errcode' and `errstring' into a UserInfo-1
2429  * external to be returned to the client in accordance with Z35.90
2430  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2431  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2432  */
2433 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2434 {
2435     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2436         addinfo ? " -- " : "", addinfo ? addinfo : "");
2437     return zget_init_diagnostics(odr, error, addinfo);
2438 }
2439
2440 /*
2441  * nonsurrogate diagnostic record.
2442  */
2443 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2444 {
2445     Z_Records *rec = (Z_Records *) odr_malloc(assoc->encode, sizeof(*rec));
2446
2447     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2448             addinfo ? " -- " : "", addinfo ? addinfo : "");
2449
2450     rec->which = Z_Records_NSD;
2451     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2452                                                            error, addinfo);
2453     return rec;
2454 }
2455
2456 /*
2457  * surrogate diagnostic.
2458  */
2459 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2460                                           const char *dbname,
2461                                           int error, const char *addinfo)
2462 {
2463     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2464             addinfo ? " -- " : "", addinfo ? addinfo : "");
2465     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2466 }
2467
2468 static Z_Records *pack_records(association *a, char *setname, Odr_int start,
2469                                Odr_int *num, Z_RecordComposition *comp,
2470                                Odr_int *next, Odr_int *pres,
2471                                Z_ReferenceId *referenceId,
2472                                Odr_oid *oid, int *errcode)
2473 {
2474     int recno, total_length = 0, dumped_records = 0;
2475     int toget = odr_int_to_int(*num);
2476     Z_Records *records =
2477         (Z_Records *) odr_malloc(a->encode, sizeof(*records));
2478     Z_NamePlusRecordList *reclist =
2479         (Z_NamePlusRecordList *) odr_malloc(a->encode, sizeof(*reclist));
2480
2481     records->which = Z_Records_DBOSD;
2482     records->u.databaseOrSurDiagnostics = reclist;
2483     reclist->num_records = 0;
2484
2485     if (toget < 0)
2486         return diagrec(a, YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE, 0);
2487     else if (toget == 0)
2488         reclist->records = odr_nullval();
2489     else
2490         reclist->records = (Z_NamePlusRecord **)
2491             odr_malloc(a->encode, sizeof(*reclist->records) * toget);
2492
2493     *pres = Z_PresentStatus_success;
2494     *num = 0;
2495     *next = 0;
2496
2497     yaz_log(log_requestdetail, "Request to pack " ODR_INT_PRINTF "+%d %s", start, toget, setname);
2498     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2499         a->maximumRecordSize);
2500     for (recno = odr_int_to_int(start); reclist->num_records < toget; recno++)
2501     {
2502         bend_fetch_rr freq;
2503         Z_NamePlusRecord *thisrec;
2504         int this_length = 0;
2505         /*
2506          * we get the number of bytes allocated on the stream before any
2507          * allocation done by the backend - this should give us a reasonable
2508          * idea of the total size of the data so far.
2509          */
2510         total_length = odr_total(a->encode) - dumped_records;
2511         freq.errcode = 0;
2512         freq.errstring = 0;
2513         freq.basename = 0;
2514         freq.len = 0;
2515         freq.record = 0;
2516         freq.last_in_set = 0;
2517         freq.setname = setname;
2518         freq.surrogate_flag = 0;
2519         freq.number = recno;
2520         freq.comp = comp;
2521         freq.request_format = oid;
2522         freq.output_format = 0;
2523         freq.stream = a->encode;
2524         freq.print = a->print;
2525         freq.referenceId = referenceId;
2526         freq.schema = 0;
2527
2528         retrieve_fetch(a, &freq);
2529
2530         *next = freq.last_in_set ? 0 : recno + 1;
2531
2532         if (freq.errcode)
2533         {
2534             if (!freq.surrogate_flag) /* non-surrogate diagnostic i.e. global */
2535             {
2536                 char s[20];
2537                 *pres = Z_PresentStatus_failure;
2538                 /* for 'present request out of range',
2539                    set addinfo to record position if not set */
2540                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2541                                 freq.errstring == 0)
2542                 {
2543                     sprintf(s, "%d", recno);
2544                     freq.errstring = s;
2545                 }
2546                 if (errcode)
2547                     *errcode = freq.errcode;
2548                 return diagrec(a, freq.errcode, freq.errstring);
2549             }
2550             reclist->records[reclist->num_records] =
2551                 surrogatediagrec(a, freq.basename, freq.errcode,
2552                                  freq.errstring);
2553             reclist->num_records++;
2554             continue;
2555         }
2556         if (freq.record == 0)  /* no error and no record ? */
2557         {
2558             *pres = Z_PresentStatus_partial_4;
2559             *next = 0;   /* signal end-of-set and stop */
2560             break;
2561         }
2562         if (freq.len >= 0)
2563             this_length = freq.len;
2564         else
2565             this_length = odr_total(a->encode) - total_length - dumped_records;
2566         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2567             this_length, total_length, dumped_records);
2568         if (a->preferredMessageSize > 0 &&
2569                 this_length + total_length > a->preferredMessageSize)
2570         {
2571             /* record is small enough, really */
2572             if (this_length <= a->preferredMessageSize && recno > start)
2573             {
2574                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2575                 *pres = Z_PresentStatus_partial_2;
2576                 if (*next > 0)
2577                     (*next)--;
2578                 break;
2579             }
2580             /* record can only be fetched by itself */
2581             if (this_length < a->maximumRecordSize)
2582             {
2583                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2584                 if (toget > 1)
2585                 {
2586                     yaz_log(YLOG_DEBUG, "  Dropped it");
2587                     reclist->records[reclist->num_records] =
2588                          surrogatediagrec(
2589                              a, freq.basename,
2590                              YAZ_BIB1_RECORD_EXCEEDS_PREFERRED_MESSAGE_SIZE, 0);
2591                     reclist->num_records++;
2592                     dumped_records += this_length;
2593                     continue;
2594                 }
2595             }
2596             else /* too big entirely */
2597             {
2598                 yaz_log(log_requestdetail, "Record > maxrcdsz "
2599                         "this=%d max=%d",
2600                         this_length, a->maximumRecordSize);
2601                 reclist->records[reclist->num_records] =
2602                     surrogatediagrec(
2603                         a, freq.basename,
2604                         YAZ_BIB1_RECORD_EXCEEDS_MAXIMUM_RECORD_SIZE, 0);
2605                 reclist->num_records++;
2606                 dumped_records += this_length;
2607                 continue;
2608             }
2609         }
2610
2611         if (!(thisrec = (Z_NamePlusRecord *)
2612               odr_malloc(a->encode, sizeof(*thisrec))))
2613             return 0;
2614         thisrec->databaseName = odr_strdup_null(a->encode, freq.basename);
2615         thisrec->which = Z_NamePlusRecord_databaseRecord;
2616
2617         if (!freq.output_format)
2618         {
2619             yaz_log(YLOG_WARN, "bend_fetch output_format not set");
2620             return 0;
2621         }
2622         thisrec->u.databaseRecord = z_ext_record_oid(
2623             a->encode, freq.output_format, freq.record, freq.len);
2624         if (!thisrec->u.databaseRecord)
2625             return 0;
2626         reclist->records[reclist->num_records] = thisrec;
2627         reclist->num_records++;
2628         if (freq.last_in_set)
2629             break;
2630     }
2631     *num = reclist->num_records;
2632     return records;
2633 }
2634
2635 static Z_APDU *process_searchRequest(association *assoc, request *reqb)
2636 {
2637     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2638     bend_search_rr *bsrr =
2639         (bend_search_rr *)nmem_malloc(reqb->request_mem, sizeof(*bsrr));
2640
2641     yaz_log(log_requestdetail, "Got SearchRequest.");
2642     bsrr->association = assoc;
2643     bsrr->referenceId = req->referenceId;
2644     bsrr->srw_sortKeys = 0;
2645     bsrr->srw_setname = 0;
2646     bsrr->srw_setnameIdleTime = 0;
2647     bsrr->estimated_hit_count = 0;
2648     bsrr->partial_resultset = 0;
2649     bsrr->extra_args = 0;
2650     bsrr->extra_response_data = 0;
2651
2652     yaz_log(log_requestdetail, "ResultSet '%s'", req->resultSetName);
2653     if (req->databaseNames)
2654     {
2655         int i;
2656         for (i = 0; i < req->num_databaseNames; i++)
2657             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2658     }
2659
2660     yaz_log_zquery_level(log_requestdetail,req->query);
2661
2662     if (assoc->init->bend_search)
2663     {
2664         bsrr->setname = req->resultSetName;
2665         bsrr->replace_set = *req->replaceIndicator;
2666         bsrr->num_bases = req->num_databaseNames;
2667         bsrr->basenames = req->databaseNames;
2668         bsrr->query = req->query;
2669         bsrr->stream = assoc->encode;
2670         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2671         bsrr->decode = assoc->decode;
2672         bsrr->print = assoc->print;
2673         bsrr->hits = 0;
2674         bsrr->errcode = 0;
2675         bsrr->errstring = NULL;
2676         bsrr->search_info = NULL;
2677         bsrr->search_input = req->otherInfo;
2678         bsrr->present_number = *req->mediumSetPresentNumber;
2679
2680         if (assoc->server && assoc->server->cql_transform
2681             && req->query->which == Z_Query_type_104
2682             && req->query->u.type_104->which == Z_External_CQL)
2683         {
2684             /* have a CQL query and a CQL to PQF transform .. */
2685             int srw_errcode =
2686                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2687                         assoc->server->cql_transform, bsrr->query,
2688                         &bsrr->srw_sortKeys);
2689             if (srw_errcode)
2690                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2691         }
2692
2693         if (assoc->server && assoc->server->ccl_transform
2694             && req->query->which == Z_Query_type_2) /*CCL*/
2695         {
2696             /* have a CCL query and a CCL to PQF transform .. */
2697             int srw_errcode =
2698                 ccl2pqf(bsrr->stream, req->query->u.type_2,
2699                         assoc->server->ccl_transform, bsrr);
2700             if (srw_errcode)
2701                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2702         }
2703
2704         if (!bsrr->errcode)
2705             (assoc->init->bend_search)(assoc->backend, bsrr);
2706     }
2707     else
2708     {
2709         /* FIXME - make a diagnostic for it */
2710         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2711     }
2712     return response_searchRequest(assoc, reqb, bsrr);
2713 }
2714
2715 /*
2716  * Prepare a searchresponse based on the backend results. We probably want
2717  * to look at making the fetching of records nonblocking as well, but
2718  * so far, we'll keep things simple.
2719  * If bsrt is null, that means we're called in response to a communications
2720  * event, and we'll have to get the response for ourselves.
2721  */
2722 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2723                                       bend_search_rr *bsrt)
2724 {
2725     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2726     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2727     Z_SearchResponse *resp = (Z_SearchResponse *)
2728         odr_malloc(assoc->encode, sizeof(*resp));
2729     Odr_int *nulint = odr_intdup(assoc->encode, 0);
2730     Odr_int *next = odr_intdup(assoc->encode, 0);
2731     Odr_int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2732     Odr_int returnedrecs = 0;
2733
2734     apdu->which = Z_APDU_searchResponse;
2735     apdu->u.searchResponse = resp;
2736     resp->referenceId = req->referenceId;
2737     resp->additionalSearchInfo = 0;
2738     resp->otherInfo = 0;
2739     if (!bsrt)
2740     {
2741         yaz_log(YLOG_FATAL, "Bad result from backend");
2742         return 0;
2743     }
2744     else if (bsrt->errcode)
2745     {
2746         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2747         resp->resultCount = nulint;
2748         resp->numberOfRecordsReturned = nulint;
2749         resp->nextResultSetPosition = nulint;
2750         resp->searchStatus = odr_booldup(assoc->encode, 0);
2751         resp->resultSetStatus = none;
2752         resp->presentStatus = 0;
2753     }
2754     else
2755     {
2756         bool_t *sr = odr_booldup(assoc->encode, 1);
2757         Odr_int *toget = odr_intdup(assoc->encode, 0);
2758         Z_RecordComposition comp, *compp = 0;
2759
2760         yaz_log(log_requestdetail, "resultCount: " ODR_INT_PRINTF, bsrt->hits);
2761
2762         resp->records = 0;
2763         resp->resultCount = &bsrt->hits;
2764
2765         comp.which = Z_RecordComp_simple;
2766         /* how many records does the user agent want, then? */
2767         if (bsrt->hits < 0)
2768             *toget = 0;
2769         else if (bsrt->hits <= *req->smallSetUpperBound)
2770         {
2771             *toget = bsrt->hits;
2772             if ((comp.u.simple = req->smallSetElementSetNames))
2773                 compp = &comp;
2774         }
2775         else if (bsrt->hits < *req->largeSetLowerBound)
2776         {
2777             *toget = *req->mediumSetPresentNumber;
2778             if (*toget > bsrt->hits)
2779                 *toget = bsrt->hits;
2780             if ((comp.u.simple = req->mediumSetElementSetNames))
2781                 compp = &comp;
2782         }
2783         else
2784             *toget = 0;
2785
2786         if (*toget && !resp->records)
2787         {
2788             Odr_int *presst = odr_intdup(assoc->encode, 0);
2789             /* Call bend_present if defined */
2790             if (assoc->init->bend_present)
2791             {
2792                 bend_present_rr *bprr = (bend_present_rr *)
2793                     nmem_malloc(reqb->request_mem, sizeof(*bprr));
2794                 bprr->setname = req->resultSetName;
2795                 bprr->start = 1;
2796                 bprr->number = odr_int_to_int(*toget);
2797                 bprr->format = req->preferredRecordSyntax;
2798                 bprr->comp = compp;
2799                 bprr->referenceId = req->referenceId;
2800                 bprr->stream = assoc->encode;
2801                 bprr->print = assoc->print;
2802                 bprr->association = assoc;
2803                 bprr->errcode = 0;
2804                 bprr->errstring = NULL;
2805                 (*assoc->init->bend_present)(assoc->backend, bprr);
2806
2807                 if (bprr->errcode)
2808                 {
2809                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2810                     *resp->presentStatus = Z_PresentStatus_failure;
2811                 }
2812             }
2813
2814             if (!resp->records)
2815                 resp->records = pack_records(
2816                     assoc, req->resultSetName, 1,
2817                     toget, compp, next, presst, req->referenceId,
2818                     req->preferredRecordSyntax, NULL);
2819             if (!resp->records)
2820                 return 0;
2821             resp->numberOfRecordsReturned = toget;
2822             returnedrecs = *toget;
2823             resp->presentStatus = presst;
2824         }
2825         else
2826         {
2827             if (*resp->resultCount)
2828                 *next = 1;
2829             resp->numberOfRecordsReturned = nulint;
2830             resp->presentStatus = 0;
2831         }
2832         resp->nextResultSetPosition = next;
2833         resp->searchStatus = sr;
2834         resp->resultSetStatus = 0;
2835         if (bsrt->estimated_hit_count)
2836         {
2837             resp->resultSetStatus = odr_intdup(assoc->encode,
2838                                                Z_SearchResponse_estimate);
2839         }
2840         else if (bsrt->partial_resultset)
2841         {
2842             resp->resultSetStatus = odr_intdup(assoc->encode,
2843                                                Z_SearchResponse_subset);
2844         }
2845     }
2846     resp->additionalSearchInfo = bsrt->search_info;
2847
2848     if (log_request)
2849     {
2850         int i;
2851         WRBUF wr = wrbuf_alloc();
2852
2853         for (i = 0 ; i < req->num_databaseNames; i++)
2854         {
2855             if (i)
2856                 wrbuf_printf(wr, "+");
2857             wrbuf_puts(wr, req->databaseNames[i]);
2858         }
2859         wrbuf_printf(wr, " ");
2860
2861         if (bsrt->errcode)
2862             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2863         else
2864             wrbuf_printf(wr, "OK " ODR_INT_PRINTF, bsrt->hits);
2865         wrbuf_printf(wr, " %s 1+" ODR_INT_PRINTF " ",
2866                      req->resultSetName, returnedrecs);
2867         yaz_query_to_wrbuf(wr, req->query);
2868
2869         yaz_log(log_request, "Search %s", wrbuf_cstr(wr));
2870         wrbuf_destroy(wr);
2871     }
2872     return apdu;
2873 }
2874
2875 /*
2876  * Maybe we got a little over-friendly when we designed bend_fetch to
2877  * get only one record at a time. Some backends can optimise multiple-record
2878  * fetches, and at any rate, there is some overhead involved in
2879  * all that selecting and hopping around. Problem is, of course, that the
2880  * frontend can't know ahead of time how many records it'll need to
2881  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2882  * is downright lousy as a bulk data transfer protocol.
2883  *
2884  * To start with, we'll do the fetching of records from the backend
2885  * in one operation: To save some trips in and out of the event-handler,
2886  * and to simplify the interface to pack_records. At any rate, asynch
2887  * operation is more fun in operations that have an unpredictable execution
2888  * speed - which is normally more true for search than for present.
2889  */
2890 static Z_APDU *process_presentRequest(association *assoc, request *reqb)
2891 {
2892     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2893     Z_APDU *apdu;
2894     Z_PresentResponse *resp;
2895     Odr_int *next;
2896     Odr_int *num;
2897     int errcode = 0;
2898
2899     yaz_log(log_requestdetail, "Got PresentRequest.");
2900
2901     resp = (Z_PresentResponse *)odr_malloc(assoc->encode, sizeof(*resp));
2902     resp->records = 0;
2903     resp->presentStatus = odr_intdup(assoc->encode, 0);
2904     if (assoc->init->bend_present)
2905     {
2906         bend_present_rr *bprr = (bend_present_rr *)
2907             nmem_malloc(reqb->request_mem, sizeof(*bprr));
2908         bprr->setname = req->resultSetId;
2909         bprr->start = odr_int_to_int(*req->resultSetStartPoint);
2910         bprr->number = odr_int_to_int(*req->numberOfRecordsRequested);
2911         bprr->format = req->preferredRecordSyntax;
2912         bprr->comp = req->recordComposition;
2913         bprr->referenceId = req->referenceId;
2914         bprr->stream = assoc->encode;
2915         bprr->print = assoc->print;
2916         bprr->association = assoc;
2917         bprr->errcode = 0;
2918         bprr->errstring = NULL;
2919         (*assoc->init->bend_present)(assoc->backend, bprr);
2920
2921         if (bprr->errcode)
2922         {
2923             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2924             *resp->presentStatus = Z_PresentStatus_failure;
2925             errcode = bprr->errcode;
2926         }
2927     }
2928     apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2929     next = odr_intdup(assoc->encode, 0);
2930     num = odr_intdup(assoc->encode, 0);
2931
2932     apdu->which = Z_APDU_presentResponse;
2933     apdu->u.presentResponse = resp;
2934     resp->referenceId = req->referenceId;
2935     resp->otherInfo = 0;
2936
2937     if (!resp->records)
2938     {
2939         *num = *req->numberOfRecordsRequested;
2940         resp->records =
2941             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2942                          num, req->recordComposition, next,
2943                          resp->presentStatus,
2944                          req->referenceId, req->preferredRecordSyntax,
2945                          &errcode);
2946     }
2947     if (log_request)
2948     {
2949         WRBUF wr = wrbuf_alloc();
2950         wrbuf_printf(wr, "Present ");
2951
2952         if (*resp->presentStatus == Z_PresentStatus_failure)
2953             wrbuf_printf(wr, "ERROR %d ", errcode);
2954         else if (*resp->presentStatus == Z_PresentStatus_success)
2955             wrbuf_printf(wr, "OK -  ");
2956         else
2957             wrbuf_printf(wr, "Partial " ODR_INT_PRINTF " - ",
2958                          *resp->presentStatus);
2959
2960         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
2961                 req->resultSetId, *req->resultSetStartPoint,
2962                 *req->numberOfRecordsRequested);
2963         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
2964         wrbuf_destroy(wr);
2965     }
2966     if (!resp->records)
2967         return 0;
2968     resp->numberOfRecordsReturned = num;
2969     resp->nextResultSetPosition = next;
2970
2971     return apdu;
2972 }
2973
2974 /*
2975  * Scan was implemented rather in a hurry, and with support for only the basic
2976  * elements of the service in the backend API. Suggestions are welcome.
2977  */
2978 static Z_APDU *process_scanRequest(association *assoc, request *reqb)
2979 {
2980     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2981     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2982     Z_ScanResponse *res = (Z_ScanResponse *)
2983         odr_malloc(assoc->encode, sizeof(*res));
2984     Odr_int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2985     Odr_int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2986     Z_ListEntries *ents = (Z_ListEntries *)
2987         odr_malloc(assoc->encode, sizeof(*ents));
2988     Z_DiagRecs *diagrecs_p = NULL;
2989     bend_scan_rr *bsrr = (bend_scan_rr *)
2990         odr_malloc(assoc->encode, sizeof(*bsrr));
2991     struct scan_entry *save_entries;
2992     int step_size = 0;
2993
2994     yaz_log(log_requestdetail, "Got ScanRequest");
2995
2996     apdu->which = Z_APDU_scanResponse;
2997     apdu->u.scanResponse = res;
2998     res->referenceId = req->referenceId;
2999
3000     /* if step is absent, set it to 0 */
3001     if (req->stepSize)
3002         step_size = odr_int_to_int(*req->stepSize);
3003
3004     res->stepSize = 0;
3005     res->scanStatus = scanStatus;
3006     res->numberOfEntriesReturned = numberOfEntriesReturned;
3007     res->positionOfTerm = 0;
3008     res->entries = ents;
3009     ents->num_entries = 0;
3010     ents->entries = NULL;
3011     ents->num_nonsurrogateDiagnostics = 0;
3012     ents->nonsurrogateDiagnostics = NULL;
3013     res->attributeSet = 0;
3014     res->otherInfo = 0;
3015
3016     if (req->databaseNames)
3017     {
3018         int i;
3019         for (i = 0; i < req->num_databaseNames; i++)
3020             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
3021     }
3022     bsrr->scanClause = 0;
3023     bsrr->errcode = 0;
3024     bsrr->errstring = 0;
3025     bsrr->num_bases = req->num_databaseNames;
3026     bsrr->basenames = req->databaseNames;
3027     bsrr->num_entries = odr_int_to_int(*req->numberOfTermsRequested);
3028     bsrr->term = req->termListAndStartPoint;
3029     bsrr->referenceId = req->referenceId;
3030     bsrr->stream = assoc->encode;
3031     bsrr->print = assoc->print;
3032     bsrr->step_size = &step_size;
3033     bsrr->setname = yaz_oi_get_string_oid(&req->otherInfo,
3034                                           yaz_oid_userinfo_scan_set, 1, 0);
3035     bsrr->entries = 0;
3036     bsrr->extra_args = 0;
3037     bsrr->extra_response_data = 0;
3038     /* For YAZ 2.0 and earlier it was the backend handler that
3039        initialized entries (member display_term did not exist)
3040        YAZ 2.0 and later sets 'entries'  and initialize all members
3041        including 'display_term'. If YAZ 2.0 or later sees that
3042        entries was modified - we assume that it is an old handler and
3043        that 'display_term' is _not_ set.
3044     */
3045     if (bsrr->num_entries > 0)
3046     {
3047         int i;
3048         bsrr->entries = (struct scan_entry *)
3049             odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3050                        bsrr->num_entries);
3051         for (i = 0; i<bsrr->num_entries; i++)
3052         {
3053             bsrr->entries[i].term = 0;
3054             bsrr->entries[i].occurrences = 0;
3055             bsrr->entries[i].errcode = 0;
3056             bsrr->entries[i].errstring = 0;
3057             bsrr->entries[i].display_term = 0;
3058         }
3059     }
3060     save_entries = bsrr->entries;  /* save it so we can compare later */
3061
3062     bsrr->attributeset = req->attributeSet;
3063     log_scan_term_level(log_requestdetail, req->termListAndStartPoint,
3064                         bsrr->attributeset);
3065     bsrr->term_position = req->preferredPositionInResponse ?
3066         odr_int_to_int(*req->preferredPositionInResponse) : 1;
3067
3068     ((int (*)(void *, bend_scan_rr *))
3069      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3070
3071     if (bsrr->errcode)
3072         diagrecs_p = zget_DiagRecs(assoc->encode,
3073                                    bsrr->errcode, bsrr->errstring);
3074     else
3075     {
3076         int i;
3077         Z_Entry **tab = (Z_Entry **)
3078             odr_malloc(assoc->encode, sizeof(*tab) * bsrr->num_entries);
3079
3080         if (bsrr->status == BEND_SCAN_PARTIAL)
3081             *scanStatus = Z_Scan_partial_5;
3082         else
3083             *scanStatus = Z_Scan_success;
3084         res->stepSize = odr_intdup(assoc->encode, step_size);
3085         ents->entries = tab;
3086         ents->num_entries = bsrr->num_entries;
3087         res->numberOfEntriesReturned = odr_intdup(assoc->encode,
3088                                                    ents->num_entries);
3089         res->positionOfTerm = odr_intdup(assoc->encode, bsrr->term_position);
3090         for (i = 0; i < bsrr->num_entries; i++)
3091         {
3092             Z_Entry *e;
3093             Z_TermInfo *t;
3094             Odr_oct *o;
3095
3096             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3097             if (bsrr->entries[i].occurrences >= 0)
3098             {
3099                 e->which = Z_Entry_termInfo;
3100                 e->u.termInfo = t = (Z_TermInfo *)
3101                     odr_malloc(assoc->encode, sizeof(*t));
3102                 t->suggestedAttributes = 0;
3103                 t->displayTerm = 0;
3104                 if (save_entries == bsrr->entries &&
3105                     bsrr->entries[i].display_term)
3106                 {
3107                     /* the entries was _not_ set by the handler. So it's
3108                        safe to test for new member display_term. It is
3109                        NULL'ed by us.
3110                     */
3111                     t->displayTerm = odr_strdup(assoc->encode,
3112                                                 bsrr->entries[i].display_term);
3113                 }
3114                 t->alternativeTerm = 0;
3115                 t->byAttributes = 0;
3116                 t->otherTermInfo = 0;
3117                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3118                 t->term = (Z_Term *)
3119                     odr_malloc(assoc->encode, sizeof(*t->term));
3120                 t->term->which = Z_Term_general;
3121                 t->term->u.general = o =
3122                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3123                 o->buf = (unsigned char *)
3124                     odr_malloc(assoc->encode, o->len = o->size =
3125                                strlen(bsrr->entries[i].term));
3126                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3127                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (" ODR_INT_PRINTF ")", i,
3128                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3129             }
3130             else
3131             {
3132                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3133                                                   bsrr->entries[i].errcode,
3134                                                   bsrr->entries[i].errstring);
3135                 assert(drecs->num_diagRecs == 1);
3136                 e->which = Z_Entry_surrogateDiagnostic;
3137                 assert(drecs->diagRecs[0]);
3138                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3139             }
3140         }
3141     }
3142     if (diagrecs_p)
3143     {
3144         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3145         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3146     }
3147     if (log_request)
3148     {
3149         int i;
3150         WRBUF wr = wrbuf_alloc();
3151         wrbuf_printf(wr, "Scan ");
3152         for (i = 0 ; i < req->num_databaseNames; i++)
3153         {
3154             if (i)
3155                 wrbuf_printf(wr, "+");
3156             wrbuf_puts(wr, req->databaseNames[i]);
3157         }
3158
3159         wrbuf_printf(wr, " ");
3160
3161         if (bsrr->errcode)
3162             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3163         else
3164             wrbuf_printf(wr, "OK");
3165
3166         wrbuf_printf(wr, " " ODR_INT_PRINTF " - " ODR_INT_PRINTF "+"
3167                      ODR_INT_PRINTF "+" ODR_INT_PRINTF,
3168                      res->numberOfEntriesReturned ?
3169                      *res->numberOfEntriesReturned : 0,
3170                      (req->preferredPositionInResponse ?
3171                       *req->preferredPositionInResponse : 1),
3172                      *req->numberOfTermsRequested,
3173                      (res->stepSize ? *res->stepSize : 1));
3174
3175         if (bsrr->setname)
3176             wrbuf_printf(wr, "+%s", bsrr->setname);
3177
3178         wrbuf_printf(wr, " ");
3179         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3180                           bsrr->attributeset);
3181         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3182         wrbuf_destroy(wr);
3183     }
3184     return apdu;
3185 }
3186
3187 static Z_APDU *process_sortRequest(association *assoc, request *reqb)
3188 {
3189     int i;
3190     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3191     Z_SortResponse *res = (Z_SortResponse *)
3192         odr_malloc(assoc->encode, sizeof(*res));
3193     bend_sort_rr *bsrr = (bend_sort_rr *)
3194         odr_malloc(assoc->encode, sizeof(*bsrr));
3195
3196     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3197
3198     yaz_log(log_requestdetail, "Got SortRequest.");
3199
3200     bsrr->num_input_setnames = req->num_inputResultSetNames;
3201     for (i=0;i<req->num_inputResultSetNames;i++)
3202         yaz_log(log_requestdetail, "Input resultset: '%s'",
3203                 req->inputResultSetNames[i]);
3204     bsrr->input_setnames = req->inputResultSetNames;
3205     bsrr->referenceId = req->referenceId;
3206     bsrr->output_setname = req->sortedResultSetName;
3207     yaz_log(log_requestdetail, "Output resultset: '%s'",
3208                 req->sortedResultSetName);
3209     bsrr->sort_sequence = req->sortSequence;
3210        /*FIXME - dump those sequences too */
3211     bsrr->stream = assoc->encode;
3212     bsrr->print = assoc->print;
3213
3214     bsrr->sort_status = Z_SortResponse_failure;
3215     bsrr->errcode = 0;
3216     bsrr->errstring = 0;
3217
3218     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3219
3220     res->referenceId = bsrr->referenceId;
3221     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3222     res->resultSetStatus = 0;
3223     if (bsrr->errcode)
3224     {
3225         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3226                                        bsrr->errcode, bsrr->errstring);
3227         res->diagnostics = dr->diagRecs;
3228         res->num_diagnostics = dr->num_diagRecs;
3229     }
3230     else
3231     {
3232         res->num_diagnostics = 0;
3233         res->diagnostics = 0;
3234     }
3235     res->resultCount = 0;
3236     res->otherInfo = 0;
3237
3238     apdu->which = Z_APDU_sortResponse;
3239     apdu->u.sortResponse = res;
3240     if (log_request)
3241     {
3242         WRBUF wr = wrbuf_alloc();
3243         wrbuf_printf(wr, "Sort ");
3244         if (bsrr->errcode)
3245             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3246         else
3247             wrbuf_printf(wr,  "OK -");
3248         wrbuf_printf(wr, " (");
3249         for (i = 0; i<req->num_inputResultSetNames; i++)
3250         {
3251             if (i)
3252                 wrbuf_printf(wr, "+");
3253             wrbuf_puts(wr, req->inputResultSetNames[i]);
3254         }
3255         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3256
3257         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3258         wrbuf_destroy(wr);
3259     }
3260     return apdu;
3261 }
3262
3263 static Z_APDU *process_deleteRequest(association *assoc, request *reqb)
3264 {
3265     int i;
3266     Z_DeleteResultSetRequest *req =
3267         reqb->apdu_request->u.deleteResultSetRequest;
3268     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3269         odr_malloc(assoc->encode, sizeof(*res));
3270     bend_delete_rr *bdrr = (bend_delete_rr *)
3271         odr_malloc(assoc->encode, sizeof(*bdrr));
3272     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3273
3274     yaz_log(log_requestdetail, "Got DeleteRequest.");
3275
3276     bdrr->num_setnames = req->num_resultSetList;
3277     bdrr->setnames = req->resultSetList;
3278     for (i = 0; i<req->num_resultSetList; i++)
3279         yaz_log(log_requestdetail, "resultset: '%s'",
3280                 req->resultSetList[i]);
3281     bdrr->stream = assoc->encode;
3282     bdrr->print = assoc->print;
3283     bdrr->function = odr_int_to_int(*req->deleteFunction);
3284     bdrr->referenceId = req->referenceId;
3285     bdrr->statuses = 0;
3286     if (bdrr->num_setnames > 0)
3287     {
3288         bdrr->statuses = (int*)
3289             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3290                        bdrr->num_setnames);
3291         for (i = 0; i < bdrr->num_setnames; i++)
3292             bdrr->statuses[i] = 0;
3293     }
3294     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3295
3296     res->referenceId = req->referenceId;
3297
3298     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3299
3300     res->deleteListStatuses = 0;
3301     if (bdrr->num_setnames > 0)
3302     {
3303         int i;
3304         res->deleteListStatuses = (Z_ListStatuses *)
3305             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3306         res->deleteListStatuses->num = bdrr->num_setnames;
3307         res->deleteListStatuses->elements =
3308             (Z_ListStatus **)
3309             odr_malloc(assoc->encode,
3310                         sizeof(*res->deleteListStatuses->elements) *
3311                         bdrr->num_setnames);
3312         for (i = 0; i<bdrr->num_setnames; i++)
3313         {
3314             res->deleteListStatuses->elements[i] =
3315                 (Z_ListStatus *)
3316                 odr_malloc(assoc->encode,
3317                             sizeof(**res->deleteListStatuses->elements));
3318             res->deleteListStatuses->elements[i]->status =
3319                 odr_intdup(assoc->encode, bdrr->statuses[i]);
3320             res->deleteListStatuses->elements[i]->id =
3321                 odr_strdup(assoc->encode, bdrr->setnames[i]);
3322         }
3323     }
3324     res->numberNotDeleted = 0;
3325     res->bulkStatuses = 0;
3326     res->deleteMessage = 0;
3327     res->otherInfo = 0;
3328
3329     apdu->which = Z_APDU_deleteResultSetResponse;
3330     apdu->u.deleteResultSetResponse = res;
3331     if (log_request)
3332     {
3333         WRBUF wr = wrbuf_alloc();
3334         wrbuf_printf(wr, "Delete ");
3335         if (bdrr->delete_status)
3336             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3337         else
3338             wrbuf_printf(wr, "OK -");
3339         for (i = 0; i<req->num_resultSetList; i++)
3340             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3341         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3342         wrbuf_destroy(wr);
3343     }
3344     return apdu;
3345 }
3346
3347 static void process_close(association *assoc, request *reqb)
3348 {
3349     Z_Close *req = reqb->apdu_request->u.close;
3350     static char *reasons[] =
3351     {
3352         "finished",
3353         "shutdown",
3354         "systemProblem",
3355         "costLimit",
3356         "resources",
3357         "securityViolation",
3358         "protocolError",
3359         "lackOfActivity",
3360         "peerAbort",
3361         "unspecified"
3362     };
3363
3364     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3365         reasons[*req->closeReason], req->diagnosticInformation ?
3366         req->diagnosticInformation : "NULL");
3367     if (assoc->version < 3) /* to make do_force respond with close */
3368         assoc->version = 3;
3369     do_close_req(assoc, Z_Close_finished,
3370                  "Association terminated by client", reqb);
3371     yaz_log(log_request,"Close OK");
3372 }
3373
3374 static Z_APDU *process_segmentRequest(association *assoc, request *reqb)
3375 {
3376     bend_segment_rr req;
3377
3378     req.segment = reqb->apdu_request->u.segmentRequest;
3379     req.stream = assoc->encode;
3380     req.decode = assoc->decode;
3381     req.print = assoc->print;
3382     req.association = assoc;
3383
3384     (*assoc->init->bend_segment)(assoc->backend, &req);
3385
3386     return 0;
3387 }
3388
3389 static Z_APDU *process_ESRequest(association *assoc, request *reqb)
3390 {
3391     bend_esrequest_rr esrequest;
3392     const char *ext_name = "unknown";
3393
3394     Z_ExtendedServicesRequest *req =
3395         reqb->apdu_request->u.extendedServicesRequest;
3396     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3397
3398     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3399
3400     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3401     esrequest.stream = assoc->encode;
3402     esrequest.decode = assoc->decode;
3403     esrequest.print = assoc->print;
3404     esrequest.errcode = 0;
3405     esrequest.errstring = NULL;
3406     esrequest.association = assoc;
3407     esrequest.taskPackage = 0;
3408     esrequest.referenceId = req->referenceId;
3409
3410     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3411     {
3412         switch(esrequest.esr->taskSpecificParameters->which)
3413         {
3414         case Z_External_itemOrder:
3415             ext_name = "ItemOrder"; break;
3416         case Z_External_update:
3417             ext_name = "Update"; break;
3418         case Z_External_update0:
3419             ext_name = "Update0"; break;
3420         case Z_External_ESAdmin:
3421             ext_name = "Admin"; break;
3422
3423         }
3424     }
3425
3426     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3427
3428     resp->referenceId = req->referenceId;
3429
3430     if (esrequest.errcode == -1)
3431     {
3432         /* Backend service indicates request will be processed */
3433         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3434         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3435     }
3436     else if (esrequest.errcode == 0)
3437     {
3438         /* Backend service indicates request will be processed */
3439         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3440         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3441     }
3442     else
3443     {
3444         Z_DiagRecs *diagRecs =
3445             zget_DiagRecs(assoc->encode, esrequest.errcode,
3446                           esrequest.errstring);
3447         /* Backend indicates error, request will not be processed */
3448         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3449         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3450         resp->num_diagnostics = diagRecs->num_diagRecs;
3451         resp->diagnostics = diagRecs->diagRecs;
3452         if (log_request)
3453         {
3454             WRBUF wr = wrbuf_alloc();
3455             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3456             yaz_log(log_request, "EsRequest %s", wrbuf_cstr(wr) );
3457             wrbuf_destroy(wr);
3458         }
3459
3460     }
3461     /* Do something with the members of bend_extendedservice */
3462     if (esrequest.taskPackage)
3463     {
3464         resp->taskPackage = z_ext_record_oid(
3465             assoc->encode, yaz_oid_recsyn_extended,
3466             (const char *)  esrequest.taskPackage, -1);
3467     }
3468     yaz_log(YLOG_DEBUG,"Send the result apdu");
3469     return apdu;
3470 }
3471
3472 int bend_assoc_is_alive(bend_association assoc)
3473 {
3474     if (assoc->state == ASSOC_DEAD)
3475         return 0; /* already marked as dead. Don't check I/O chan anymore */
3476
3477     return iochan_is_alive(assoc->client_chan);
3478 }
3479
3480
3481 /*
3482  * Local variables:
3483  * c-basic-offset: 4
3484  * c-file-style: "Stroustrup"
3485  * indent-tabs-mode: nil
3486  * End:
3487  * vim: shiftwidth=4 tabstop=8 expandtab
3488  */
3489