src/seshigh.c

   1 /*
   2  * Copyright (C) 1995-2007, Index Data ApS
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: seshigh.c,v 1.116 2007-05-02 11:53:25 adam Exp $
   6  */
   7 /**
   8  * \file seshigh.c
   9  * \brief Implements GFS session logic.
  10  *
  11  * Frontend server logic.
  12  *
  13  * This code receives incoming APDUs, and handles client requests by means
  14  * of the backend API.
  15  *
  16  * Some of the code is getting quite involved, compared to simpler servers -
  17  * primarily because it is asynchronous both in the communication with
  18  * the user and the backend. We think the complexity will pay off in
  19  * the form of greater flexibility when more asynchronous facilities
  20  * are implemented.
  21  *
  22  * Memory management has become somewhat involved. In the simple case, where
  23  * only one PDU is pending at a time, it will simply reuse the same memory,
  24  * once it has found its working size. When we enable multiple concurrent
  25  * operations, perhaps even with multiple parallel calls to the backend, it
  26  * will maintain a pool of buffers for encoding and decoding, trying to
  27  * minimize memory allocation/deallocation during normal operation.
  28  *
  29  */
  30
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <assert.h>
  34 #include <ctype.h>
  35
  36 #if HAVE_SYS_TYPES_H
  37 #include <sys/types.h>
  38 #endif
  39 #if HAVE_SYS_STAT_H
  40 #include <sys/stat.h>
  41 #endif
  42
  43 #ifdef WIN32
  44 #include <io.h>
  45 #define S_ISREG(x) (x & _S_IFREG)
  46 #include <process.h>
  47 #endif
  48
  49 #if HAVE_UNISTD_H
  50 #include <unistd.h>
  51 #endif
  52
  53 #if YAZ_HAVE_XML2
  54 #include <libxml/parser.h>
  55 #include <libxml/tree.h>
  56 #endif
  57
  58 #include <yaz/yconfig.h>
  59 #include <yaz/xmalloc.h>
  60 #include <yaz/comstack.h>
  61 #include "eventl.h"
  62 #include "session.h"
  63 #include "mime.h"
  64 #include <yaz/proto.h>
  65 #include <yaz/oid_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
  80 static void process_gdu_request(association *assoc, request *req);
  81 static int process_z_request(association *assoc, request *req, char **msg);
  82 void backend_response(IOCHAN i, int event);
  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     int *fd);
  90 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  91     bend_search_rr *bsrr, int *fd);
  92 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
  93     int *fd);
  94 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
  95 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
  96 static void process_close(association *assoc, request *reqb);
  97 void save_referenceId (request *reqb, Z_ReferenceId *refid);
  98 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
  99     int *fd);
 100 static Z_APDU *process_segmentRequest (association *assoc, request *reqb);
 101
 102 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
 103
 104 /* dynamic logging levels */
 105 static int logbits_set = 0;
 106 static int log_session = 0; /* one-line logs for session */
 107 static int log_sessiondetail = 0; /* more detailed stuff */
 108 static int log_request = 0; /* one-line logs for requests */
 109 static int log_requestdetail = 0;  /* more detailed stuff */
 110
 111 /** get_logbits sets global loglevel bits */
 112 static void get_logbits(void)
 113 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 114     if (!logbits_set)
 115     {
 116         logbits_set = 1;
 117         log_session = yaz_log_module_level("session");
 118         log_sessiondetail = yaz_log_module_level("sessiondetail");
 119         log_request = yaz_log_module_level("request");
 120         log_requestdetail = yaz_log_module_level("requestdetail");
 121     }
 122 }
 123
 124
 125
 126 static void wr_diag(WRBUF w, int error, const char *addinfo)
 127 {
 128     wrbuf_printf(w, "ERROR %d+", error);
 129     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
 130     if (addinfo){
 131         wrbuf_puts(w, "+");
 132         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
 133     }
 134
 135     wrbuf_puts(w, " ");
 136 }
 137
 138
 139 /*
 140  * Create and initialize a new association-handle.
 141  *  channel  : iochannel for the current line.
 142  *  link     : communications channel.
 143  * Returns: 0 or a new association handle.
 144  */
 145 association *create_association(IOCHAN channel, COMSTACK link,
 146                                 const char *apdufile)
 147 {
 148     association *anew;
 149
 150     if (!logbits_set)
 151         get_logbits();
 152     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 153         return 0;
 154     anew->init = 0;
 155     anew->version = 0;
 156     anew->last_control = 0;
 157     anew->client_chan = channel;
 158     anew->client_link = link;
 159     anew->cs_get_mask = 0;
 160     anew->cs_put_mask = 0;
 161     anew->cs_accept_mask = 0;
 162     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 163         !(anew->encode = odr_createmem(ODR_ENCODE)))
 164         return 0;
 165     if (apdufile && *apdufile)
 166     {
 167         FILE *f;
 168
 169         if (!(anew->print = odr_createmem(ODR_PRINT)))
 170             return 0;
 171         if (*apdufile == '@')
 172         {
 173             odr_setprint(anew->print, yaz_log_file());
 174         }
 175         else if (*apdufile != '-')
 176         {
 177             char filename[256];
 178             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 179             if (!(f = fopen(filename, "w")))
 180             {
 181                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 182                 return 0;
 183             }
 184             setvbuf(f, 0, _IONBF, 0);
 185             odr_setprint(anew->print, f);
 186         }
 187     }
 188     else
 189         anew->print = 0;
 190     anew->input_buffer = 0;
 191     anew->input_buffer_len = 0;
 192     anew->backend = 0;
 193     anew->state = ASSOC_NEW;
 194     request_initq(&anew->incoming);
 195     request_initq(&anew->outgoing);
 196     anew->proto = cs_getproto(link);
 197     anew->server = 0;
 198     return anew;
 199 }
 200
 201 /*
 202  * Free association and release resources.
 203  */
 204 void destroy_association(association *h)
 205 {
 206     statserv_options_block *cb = statserv_getcontrol();
 207     request *req;
 208
 209     xfree(h->init);
 210     odr_destroy(h->decode);
 211     odr_destroy(h->encode);
 212     if (h->print)
 213         odr_destroy(h->print);
 214     if (h->input_buffer)
 215     xfree(h->input_buffer);
 216     if (h->backend)
 217         (*cb->bend_close)(h->backend);
 218     while ((req = request_deq(&h->incoming)))
 219         request_release(req);
 220     while ((req = request_deq(&h->outgoing)))
 221         request_release(req);
 222     request_delq(&h->incoming);
 223     request_delq(&h->outgoing);
 224     xfree(h);
 225     xmalloc_trav("session closed");
 226     if (cb && cb->one_shot)
 227     {
 228         exit (0);
 229     }
 230 }
 231
 232 static void do_close_req(association *a, int reason, char *message,
 233                          request *req)
 234 {
 235     Z_APDU apdu;
 236     Z_Close *cls = zget_Close(a->encode);
 237
 238     /* Purge request queue */
 239     while (request_deq(&a->incoming));
 240     while (request_deq(&a->outgoing));
 241     if (a->version >= 3)
 242     {
 243         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 244             reason, message ? message : "none");
 245         apdu.which = Z_APDU_close;
 246         apdu.u.close = cls;
 247         *cls->closeReason = reason;
 248         cls->diagnosticInformation = message;
 249         process_z_response(a, req, &apdu);
 250         iochan_settimeout(a->client_chan, 20);
 251     }
 252     else
 253     {
 254         request_release(req);
 255         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 256         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 257         a->cs_put_mask = 0;
 258     }
 259     a->state = ASSOC_DEAD;
 260 }
 261
 262 static void do_close(association *a, int reason, char *message)
 263 {
 264     request *req = request_get(&a->outgoing);
 265     do_close_req (a, reason, message, req);
 266 }
 267
 268
 269 int ir_read(IOCHAN h, int event)
 270 {
 271     association *assoc = (association *)iochan_getdata(h);
 272     COMSTACK conn = assoc->client_link;
 273     request *req;
 274
 275     if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 276     {
 277         yaz_log(YLOG_DEBUG, "ir_session (input)");
 278         /* We aren't speaking to this fellow */
 279         if (assoc->state == ASSOC_DEAD)
 280         {
 281             yaz_log(log_sessiondetail, "Connection closed - end of session");
 282             cs_close(conn);
 283             destroy_association(assoc);
 284             iochan_destroy(h);
 285             return 0;
 286         }
 287         assoc->cs_get_mask = EVENT_INPUT;
 288
 289         do
 290         {
 291             int res = cs_get(conn, &assoc->input_buffer,
 292                              &assoc->input_buffer_len);
 293             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 294             {
 295                 yaz_log(log_session, "Connection error: %s res=%d",
 296                         cs_errmsg(cs_errno(conn)), res);
 297                 req = request_get(&assoc->incoming); /* get a new request */
 298                 do_close_req(assoc, Z_Close_protocolError,
 299                              "Incoming package too large", req);
 300                 return 0;
 301             }
 302             else if (res <= 0)
 303             {
 304                 yaz_log(log_session, "Connection closed by client");
 305                 assoc->state = ASSOC_DEAD;
 306                 return 0;
 307             }
 308             else if (res == 1) /* incomplete read - wait for more  */
 309             {
 310                 if (conn->io_pending & CS_WANT_WRITE)
 311                     assoc->cs_get_mask |= EVENT_OUTPUT;
 312                 iochan_setflag(h, assoc->cs_get_mask);
 313                 return 0;
 314             }
 315             /* we got a complete PDU. Let's decode it */
 316             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 317                     assoc->input_buffer[0] & 0xff,
 318                     assoc->input_buffer[1] & 0xff,
 319                     assoc->input_buffer[2] & 0xff);
 320             req = request_get(&assoc->incoming); /* get a new request */
 321             odr_reset(assoc->decode);
 322             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 323             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 324             {
 325                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 326                         "[near byte %ld] ",
 327                         odr_errmsg(odr_geterror(assoc->decode)),
 328                         odr_getelement(assoc->decode),
 329                         (long) odr_offset(assoc->decode));
 330                 if (assoc->decode->error != OHTTP)
 331                 {
 332                     yaz_log(YLOG_WARN, "PDU dump:");
 333                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 334                     request_release(req);
 335                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 336                 }
 337                 else
 338                 {
 339                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 340                     assoc->state = ASSOC_DEAD;
 341                     process_gdu_response(assoc, req, p);
 342                 }
 343                 return 0;
 344             }
 345             req->request_mem = odr_extract_mem(assoc->decode);
 346             if (assoc->print)
 347             {
 348                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 349                     yaz_log(YLOG_WARN, "ODR print error: %s",
 350                             odr_errmsg(odr_geterror(assoc->print)));
 351                 odr_reset(assoc->print);
 352             }
 353             request_enq(&assoc->incoming, req);
 354         }
 355         while (cs_more(conn));
 356     }
 357     return 1;
 358 }
 359
 360 /*
 361  * This is where PDUs from the client are read and the further
 362  * processing is initiated. Flow of control moves down through the
 363  * various process_* functions below, until the encoded result comes back up
 364  * to the output handler in here.
 365  *
 366  *  h     : the I/O channel that has an outstanding event.
 367  *  event : the current outstanding event.
 368  */
 369 void ir_session(IOCHAN h, int event)
 370 {
 371     int res;
 372     association *assoc = (association *)iochan_getdata(h);
 373     COMSTACK conn = assoc->client_link;
 374     request *req;
 375
 376     assert(h && conn && assoc);
 377     if (event == EVENT_TIMEOUT)
 378     {
 379         if (assoc->state != ASSOC_UP)
 380         {
 381             yaz_log(YLOG_DEBUG, "Final timeout - closing connection.");
 382             /* do we need to lod this at all */
 383             cs_close(conn);
 384             destroy_association(assoc);
 385             iochan_destroy(h);
 386         }
 387         else
 388         {
 389             yaz_log(log_sessiondetail,
 390                     "Session idle too long. Sending close.");
 391             do_close(assoc, Z_Close_lackOfActivity, 0);
 392         }
 393         return;
 394     }
 395     if (event & assoc->cs_accept_mask)
 396     {
 397         if (!cs_accept (conn))
 398         {
 399             yaz_log (YLOG_WARN, "accept failed");
 400             destroy_association(assoc);
 401             iochan_destroy(h);
 402         }
 403         iochan_clearflag (h, EVENT_OUTPUT);
 404         if (conn->io_pending)
 405         {   /* cs_accept didn't complete */
 406             assoc->cs_accept_mask =
 407                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 408                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 409
 410             iochan_setflag (h, assoc->cs_accept_mask);
 411         }
 412         else
 413         {   /* cs_accept completed. Prepare for reading (cs_get) */
 414             assoc->cs_accept_mask = 0;
 415             assoc->cs_get_mask = EVENT_INPUT;
 416             iochan_setflag (h, assoc->cs_get_mask);
 417         }
 418         return;
 419     }
 420     if (event & assoc->cs_get_mask) /* input */
 421     {
 422         if (!ir_read(h, event))
 423             return;
 424         req = request_head(&assoc->incoming);
 425         if (req->state == REQUEST_IDLE)
 426         {
 427             request_deq(&assoc->incoming);
 428             process_gdu_request(assoc, req);
 429         }
 430     }
 431     if (event & assoc->cs_put_mask)
 432     {
 433         request *req = request_head(&assoc->outgoing);
 434
 435         assoc->cs_put_mask = 0;
 436         yaz_log(YLOG_DEBUG, "ir_session (output)");
 437         req->state = REQUEST_PENDING;
 438         switch (res = cs_put(conn, req->response, req->len_response))
 439         {
 440         case -1:
 441             yaz_log(log_sessiondetail, "Connection closed by client");
 442             cs_close(conn);
 443             destroy_association(assoc);
 444             iochan_destroy(h);
 445             break;
 446         case 0: /* all sent - release the request structure */
 447             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 448 #if 0
 449             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 450                     req->response);
 451 #endif
 452             nmem_destroy(req->request_mem);
 453             request_deq(&assoc->outgoing);
 454             request_release(req);
 455             if (!request_head(&assoc->outgoing))
 456             {   /* restore mask for cs_get operation ... */
 457                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 458                 iochan_setflag(h, assoc->cs_get_mask);
 459                 if (assoc->state == ASSOC_DEAD)
 460                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 461             }
 462             else
 463             {
 464                 assoc->cs_put_mask = EVENT_OUTPUT;
 465             }
 466             break;
 467         default:
 468             if (conn->io_pending & CS_WANT_WRITE)
 469                 assoc->cs_put_mask |= EVENT_OUTPUT;
 470             if (conn->io_pending & CS_WANT_READ)
 471                 assoc->cs_put_mask |= EVENT_INPUT;
 472             iochan_setflag(h, assoc->cs_put_mask);
 473         }
 474     }
 475     if (event & EVENT_EXCEPT)
 476     {
 477         yaz_log(YLOG_WARN, "ir_session (exception)");
 478         cs_close(conn);
 479         destroy_association(assoc);
 480         iochan_destroy(h);
 481     }
 482 }
 483
 484 static int process_z_request(association *assoc, request *req, char **msg);
 485
 486
 487 static void assoc_init_reset(association *assoc)
 488 {
 489     xfree (assoc->init);
 490     assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init));
 491
 492     assoc->init->stream = assoc->encode;
 493     assoc->init->print = assoc->print;
 494     assoc->init->auth = 0;
 495     assoc->init->referenceId = 0;
 496     assoc->init->implementation_version = 0;
 497     assoc->init->implementation_id = 0;
 498     assoc->init->implementation_name = 0;
 499     assoc->init->query_charset = 0;
 500     assoc->init->bend_sort = NULL;
 501     assoc->init->bend_search = NULL;
 502     assoc->init->bend_present = NULL;
 503     assoc->init->bend_esrequest = NULL;
 504     assoc->init->bend_delete = NULL;
 505     assoc->init->bend_scan = NULL;
 506     assoc->init->bend_segment = NULL;
 507     assoc->init->bend_fetch = NULL;
 508     assoc->init->bend_explain = NULL;
 509     assoc->init->bend_srw_scan = NULL;
 510     assoc->init->bend_srw_update = NULL;
 511
 512     assoc->init->charneg_request = NULL;
 513     assoc->init->charneg_response = NULL;
 514
 515     assoc->init->decode = assoc->decode;
 516     assoc->init->peer_name =
 517         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
 518
 519     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 520 }
 521
 522 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 523 {
 524     statserv_options_block *cb = statserv_getcontrol();
 525     if (!assoc->init)
 526     {
 527         const char *encoding = "UTF-8";
 528         Z_External *ce;
 529         bend_initresult *binitres;
 530
 531         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 532         assoc_init_reset(assoc);
 533
 534         if (sr->username)
 535         {
 536             Z_IdAuthentication *auth = odr_malloc(assoc->decode, sizeof(*auth));
 537             int len;
 538
 539             len = strlen(sr->username) + 1;
 540             if (sr->password)
 541                 len += strlen(sr->password) + 2;
 542             auth->which = Z_IdAuthentication_open;
 543             auth->u.open = 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     int *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 && rr->len > 0)
 643     {   /* post conversion must take place .. */
 644         WRBUF output_record = wrbuf_alloc();
 645         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 646         if (r)
 647         {
 648             const char *details = yaz_record_conv_get_error(rc);
 649             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 650             if (details)
 651                 rr->errstring = odr_strdup(rr->stream, details);
 652         }
 653         else
 654         {
 655             rr->len = wrbuf_len(output_record);
 656             rr->record = odr_malloc(rr->stream, rr->len);
 657             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 658         }
 659         wrbuf_destroy(output_record);
 660     }
 661     if (match_syntax)
 662         rr->output_format = match_syntax;
 663     if (match_schema)
 664         rr->schema = odr_strdup(rr->stream, match_schema);
 665     return 0;
 666 #else
 667     (*assoc->init->bend_fetch)(assoc->backend, rr);
 668 #endif
 669     return 0;
 670 }
 671
 672 static int srw_bend_fetch(association *assoc, int pos,
 673                           Z_SRW_searchRetrieveRequest *srw_req,
 674                           Z_SRW_record *record,
 675                           const char **addinfo)
 676 {
 677     bend_fetch_rr rr;
 678     ODR o = assoc->encode;
 679
 680     rr.setname = "default";
 681     rr.number = pos;
 682     rr.referenceId = 0;
 683     rr.request_format = odr_oiddup(assoc->decode, yaz_oid_recsyn_xml);
 684
 685     rr.comp = (Z_RecordComposition *)
 686             odr_malloc(assoc->decode, sizeof(*rr.comp));
 687     rr.comp->which = Z_RecordComp_complex;
 688     rr.comp->u.complex = (Z_CompSpec *)
 689             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 690     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 691         odr_malloc(assoc->encode, sizeof(bool_t));
 692     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 693     rr.comp->u.complex->num_dbSpecific = 0;
 694     rr.comp->u.complex->dbSpecific = 0;
 695     rr.comp->u.complex->num_recordSyntax = 0;
 696     rr.comp->u.complex->recordSyntax = 0;
 697
 698     rr.comp->u.complex->generic = (Z_Specification *)
 699             odr_malloc(assoc->decode, sizeof(Z_Specification));
 700
 701     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 702     rr.comp->u.complex->generic->which = Z_Schema_uri;
 703     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 704
 705     /* ESN = recordSchema if recordSchema is present */
 706     rr.comp->u.complex->generic->elementSpec = 0;
 707     if (srw_req->recordSchema)
 708     {
 709         rr.comp->u.complex->generic->elementSpec =
 710             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 711         rr.comp->u.complex->generic->elementSpec->which =
 712             Z_ElementSpec_elementSetName;
 713         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 714             srw_req->recordSchema;
 715     }
 716
 717     rr.stream = assoc->encode;
 718     rr.print = assoc->print;
 719
 720     rr.basename = 0;
 721     rr.len = 0;
 722     rr.record = 0;
 723     rr.last_in_set = 0;
 724     rr.errcode = 0;
 725     rr.errstring = 0;
 726     rr.surrogate_flag = 0;
 727     rr.schema = srw_req->recordSchema;
 728
 729     if (!assoc->init->bend_fetch)
 730         return 1;
 731
 732     retrieve_fetch(assoc, &rr);
 733
 734     if (rr.errcode && rr.surrogate_flag)
 735     {
 736         int code = yaz_diag_bib1_to_srw(rr.errcode);
 737         const char *message = yaz_diag_srw_str(code);
 738         int len = 200;
 739         if (message)
 740             len += strlen(message);
 741         if (rr.errstring)
 742             len += strlen(rr.errstring);
 743
 744         record->recordData_buf = odr_malloc(o, len);
 745
 746         sprintf(record->recordData_buf, "<diagnostic "
 747                 "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
 748                 " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
 749         if (rr.errstring)
 750             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 751                     " <details>%s</details>\n", rr.errstring);
 752         if (message)
 753             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 754                     " <message>%s</message>\n", message);
 755         sprintf(record->recordData_buf + strlen(record->recordData_buf),
 756                 "</diagnostic>\n");
 757         record->recordData_len = strlen(record->recordData_buf);
 758         record->recordPosition = odr_intdup(o, pos);
 759         record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
 760         return 0;
 761     }
 762     else if (rr.len >= 0)
 763     {
 764         record->recordData_buf = rr.record;
 765         record->recordData_len = rr.len;
 766         record->recordPosition = odr_intdup(o, pos);
 767         if (rr.schema)
 768             record->recordSchema = odr_strdup(o, rr.schema);
 769         else
 770             record->recordSchema = 0;
 771     }
 772     if (rr.errcode)
 773     {
 774         *addinfo = rr.errstring;
 775         return rr.errcode;
 776     }
 777     return 0;
 778 }
 779
 780 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 781                    Z_Query *query_result)
 782 {
 783     /* have a CQL query and  CQL to PQF transform .. */
 784     CQL_parser cp = cql_parser_create();
 785     int r;
 786     int srw_errcode = 0;
 787     const char *add = 0;
 788     char rpn_buf[5120];
 789
 790     r = cql_parser_string(cp, cql);
 791     if (r)
 792     {
 793         /* CQL syntax error */
 794         srw_errcode = 10;
 795     }
 796     if (!r)
 797     {
 798         /* Syntax OK */
 799         r = cql_transform_buf(ct,
 800                               cql_parser_result(cp),
 801                               rpn_buf, sizeof(rpn_buf)-1);
 802         if (r)
 803             srw_errcode  = cql_transform_error(ct, &add);
 804     }
 805     if (!r)
 806     {
 807         /* Syntax & transform OK. */
 808         /* Convert PQF string to Z39.50 to RPN query struct */
 809         YAZ_PQF_Parser pp = yaz_pqf_create();
 810         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 811         if (!rpnquery)
 812         {
 813             size_t off;
 814             const char *pqf_msg;
 815             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 816             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 817                     pqf_msg, code);
 818             srw_errcode = 10;
 819         }
 820         else
 821         {
 822             query_result->which = Z_Query_type_1;
 823             query_result->u.type_1 = rpnquery;
 824         }
 825         yaz_pqf_destroy(pp);
 826     }
 827     cql_parser_destroy(cp);
 828     return srw_errcode;
 829 }
 830
 831 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 832                         Z_AttributesPlusTerm *result)
 833 {
 834     Z_Query query;
 835     Z_RPNQuery *rpn;
 836     int srw_error = cql2pqf(odr, cql, ct, &query);
 837     if (srw_error)
 838         return srw_error;
 839     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 840         return 10; /* bad query type */
 841     rpn = query.u.type_1;
 842     if (!rpn->RPNStructure)
 843         return 10; /* must be structure */
 844     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 845         return 10; /* must be simple */
 846     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 847         return 10; /* must be attributes plus term node .. */
 848     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 849            sizeof(*result));
 850     return 0;
 851 }
 852
 853 static void srw_bend_search(association *assoc, request *req,
 854                             Z_SRW_PDU *sr,
 855                             Z_SRW_searchRetrieveResponse *srw_res,
 856                             int *http_code)
 857 {
 858     int srw_error = 0;
 859     Z_External *ext;
 860     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 861
 862     *http_code = 200;
 863     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 864     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 865     if (srw_res->num_diagnostics == 0 && assoc->init)
 866     {
 867         bend_search_rr rr;
 868         rr.setname = "default";
 869         rr.replace_set = 1;
 870         rr.num_bases = 1;
 871         rr.basenames = &srw_req->database;
 872         rr.referenceId = 0;
 873         rr.srw_sortKeys = 0;
 874         rr.srw_setname = 0;
 875         rr.srw_setnameIdleTime = 0;
 876         rr.estimated_hit_count = 0;
 877         rr.partial_resultset = 0;
 878         rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 879         rr.query->u.type_1 = 0;
 880
 881         if (srw_req->query_type == Z_SRW_query_type_cql)
 882         {
 883             if (assoc->server && assoc->server->cql_transform)
 884             {
 885                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 886                                           assoc->server->cql_transform,
 887                                           rr.query);
 888                 if (srw_errcode)
 889                 {
 890                     yaz_add_srw_diagnostic(assoc->encode,
 891                                            &srw_res->diagnostics,
 892                                            &srw_res->num_diagnostics,
 893                                            srw_errcode, 0);
 894                 }
 895             }
 896             else
 897             {
 898                 /* CQL query to backend. Wrap it - Z39.50 style */
 899                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 900                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 901                                                         "1.2.840.10003.16.2");
 902                 ext->indirect_reference = 0;
 903                 ext->descriptor = 0;
 904                 ext->which = Z_External_CQL;
 905                 ext->u.cql = srw_req->query.cql;
 906
 907                 rr.query->which = Z_Query_type_104;
 908                 rr.query->u.type_104 =  ext;
 909             }
 910         }
 911         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 912         {
 913             Z_RPNQuery *RPNquery;
 914             YAZ_PQF_Parser pqf_parser;
 915
 916             pqf_parser = yaz_pqf_create ();
 917
 918             RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
 919                                       srw_req->query.pqf);
 920             if (!RPNquery)
 921             {
 922                 const char *pqf_msg;
 923                 size_t off;
 924                 int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
 925                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 926                         code, pqf_msg, (long) off);
 927                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 928             }
 929
 930             rr.query->which = Z_Query_type_1;
 931             rr.query->u.type_1 =  RPNquery;
 932
 933             yaz_pqf_destroy (pqf_parser);
 934         }
 935         else
 936         {
 937             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 938                                    &srw_res->num_diagnostics,
 939                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 940         }
 941         if (rr.query->u.type_1)
 942         {
 943             rr.stream = assoc->encode;
 944             rr.decode = assoc->decode;
 945             rr.print = assoc->print;
 946             rr.request = req;
 947             if ( srw_req->sort.sortKeys )
 948                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 949                                              srw_req->sort.sortKeys );
 950             rr.association = assoc;
 951             rr.fd = 0;
 952             rr.hits = 0;
 953             rr.errcode = 0;
 954             rr.errstring = 0;
 955             rr.search_info = 0;
 956             yaz_log_zquery_level(log_requestdetail,rr.query);
 957
 958             (assoc->init->bend_search)(assoc->backend, &rr);
 959             if (rr.errcode)
 960             {
 961                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 962                 {
 963                     *http_code = 404;
 964                 }
 965                 else
 966                 {
 967                     srw_error = yaz_diag_bib1_to_srw (rr.errcode);
 968                     yaz_add_srw_diagnostic(assoc->encode,
 969                                            &srw_res->diagnostics,
 970                                            &srw_res->num_diagnostics,
 971                                            srw_error, rr.errstring);
 972                 }
 973             }
 974             else
 975             {
 976                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
 977                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
 978
 979                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
 980                         start, number, rr.hits);
 981
 982                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 983                 if (rr.srw_setname)
 984                 {
 985                     srw_res->resultSetId =
 986                         odr_strdup(assoc->encode, rr.srw_setname );
 987                     srw_res->resultSetIdleTime =
 988                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
 989                 }
 990
 991                 if ((rr.hits > 0 && start > rr.hits) || start < 1)
 992                 {
 993                     yaz_add_srw_diagnostic(
 994                         assoc->encode,
 995                         &srw_res->diagnostics, &srw_res->num_diagnostics,
 996                         YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
 997                 }
 998                 else if (number > 0)
 999                 {
1000                     int i;
1001                     int ok = 1;
1002                     if (start + number > rr.hits)
1003                         number = rr.hits - start + 1;
1004
1005                     /* Call bend_present if defined */
1006                     if (assoc->init->bend_present)
1007                     {
1008                         bend_present_rr *bprr = (bend_present_rr*)
1009                             odr_malloc (assoc->decode, sizeof(*bprr));
1010                         bprr->setname = "default";
1011                         bprr->start = start;
1012                         bprr->number = number;
1013                         if (srw_req->recordSchema)
1014                         {
1015                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1016                                                                             sizeof(*bprr->comp));
1017                             bprr->comp->which = Z_RecordComp_simple;
1018                             bprr->comp->u.simple = (Z_ElementSetNames *)
1019                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1020                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1021                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1022                         }
1023                         else
1024                         {
1025                             bprr->comp = 0;
1026                         }
1027                         bprr->stream = assoc->encode;
1028                         bprr->referenceId = 0;
1029                         bprr->print = assoc->print;
1030                         bprr->request = req;
1031                         bprr->association = assoc;
1032                         bprr->errcode = 0;
1033                         bprr->errstring = NULL;
1034                         (*assoc->init->bend_present)(assoc->backend, bprr);
1035
1036                         if (!bprr->request)
1037                             return;
1038                         if (bprr->errcode)
1039                         {
1040                             srw_error = yaz_diag_bib1_to_srw (bprr->errcode);
1041                             yaz_add_srw_diagnostic(assoc->encode,
1042                                                    &srw_res->diagnostics,
1043                                                    &srw_res->num_diagnostics,
1044                                                    srw_error, bprr->errstring);
1045                             ok = 0;
1046                         }
1047                     }
1048
1049                     if (ok)
1050                     {
1051                         int j = 0;
1052                         int packing = Z_SRW_recordPacking_string;
1053                         if (srw_req->recordPacking)
1054                         {
1055                             packing =
1056                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1057                             if (packing == -1)
1058                                 packing = Z_SRW_recordPacking_string;
1059                         }
1060                         srw_res->records = (Z_SRW_record *)
1061                             odr_malloc(assoc->encode,
1062                                        number * sizeof(*srw_res->records));
1063
1064                         srw_res->extra_records = (Z_SRW_extra_record **)
1065                             odr_malloc(assoc->encode,
1066                                        number*sizeof(*srw_res->extra_records));
1067
1068                         for (i = 0; i<number; i++)
1069                         {
1070                             int errcode;
1071                             const char *addinfo = 0;
1072
1073                             srw_res->records[j].recordPacking = packing;
1074                             srw_res->records[j].recordData_buf = 0;
1075                             srw_res->extra_records[j] = 0;
1076                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1077                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1078                                                      srw_res->records + j,
1079                                                      &addinfo);
1080                             if (errcode)
1081                             {
1082                                 yaz_add_srw_diagnostic(assoc->encode,
1083                                                        &srw_res->diagnostics,
1084                                                        &srw_res->num_diagnostics,
1085                                                        yaz_diag_bib1_to_srw (errcode),
1086                                                        addinfo);
1087
1088                                 break;
1089                             }
1090                             if (srw_res->records[j].recordData_buf)
1091                                 j++;
1092                         }
1093                         srw_res->num_records = j;
1094                         if (!j)
1095                             srw_res->records = 0;
1096                     }
1097                 }
1098                 if (rr.estimated_hit_count || rr.partial_resultset)
1099                 {
1100                     yaz_add_srw_diagnostic(
1101                         assoc->encode,
1102                         &srw_res->diagnostics,
1103                         &srw_res->num_diagnostics,
1104                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1105                         0);
1106                 }
1107             }
1108         }
1109     }
1110     if (log_request)
1111     {
1112         const char *querystr = "?";
1113         const char *querytype = "?";
1114         WRBUF wr = wrbuf_alloc();
1115
1116         switch (srw_req->query_type)
1117         {
1118         case Z_SRW_query_type_cql:
1119             querytype = "CQL";
1120             querystr = srw_req->query.cql;
1121             break;
1122         case Z_SRW_query_type_pqf:
1123             querytype = "PQF";
1124             querystr = srw_req->query.pqf;
1125             break;
1126         }
1127         wrbuf_printf(wr, "SRWSearch ");
1128         wrbuf_printf(wr, srw_req->database);
1129         wrbuf_printf(wr, " ");
1130         if (srw_res->num_diagnostics)
1131             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1132         else if (*http_code != 200)
1133             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1134         else if (srw_res->numberOfRecords)
1135         {
1136             wrbuf_printf(wr, "OK %d",
1137                          (srw_res->numberOfRecords ?
1138                           *srw_res->numberOfRecords : 0));
1139         }
1140         wrbuf_printf(wr, " %s %d+%d",
1141                      (srw_res->resultSetId ?
1142                       srw_res->resultSetId : "-"),
1143                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1144                      srw_res->num_records);
1145         yaz_log(log_request, "%s %s: %s", wrbuf_cstr(wr), querytype, querystr);
1146         wrbuf_destroy(wr);
1147     }
1148 }
1149
1150 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1151 {
1152 #if YAZ_HAVE_XML2
1153     xmlNodePtr ptr = rr->server_node_ptr;
1154     if (!ptr)
1155         return 0;
1156     for (ptr = ptr->children; ptr; ptr = ptr->next)
1157     {
1158         if (ptr->type != XML_ELEMENT_NODE)
1159             continue;
1160         if (!strcmp((const char *) ptr->name, "explain"))
1161         {
1162             int len;
1163             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1164             xmlChar *buf_out;
1165             char *content;
1166
1167             ptr = xmlCopyNode(ptr, 1);
1168
1169             xmlDocSetRootElement(doc, ptr);
1170
1171             xmlDocDumpMemory(doc, &buf_out, &len);
1172             content = (char*) odr_malloc(rr->stream, 1+len);
1173             memcpy(content, buf_out, len);
1174             content[len] = '\0';
1175
1176             xmlFree(buf_out);
1177             xmlFreeDoc(doc);
1178             rr->explain_buf = content;
1179             return 0;
1180         }
1181     }
1182 #endif
1183     return 0;
1184 }
1185
1186 static void srw_bend_explain(association *assoc, request *req,
1187                              Z_SRW_PDU *sr,
1188                              Z_SRW_explainResponse *srw_res,
1189                              int *http_code)
1190 {
1191     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1192     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1193     *http_code = 404;
1194     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1195     if (assoc->init)
1196     {
1197         bend_explain_rr rr;
1198
1199         rr.stream = assoc->encode;
1200         rr.decode = assoc->decode;
1201         rr.print = assoc->print;
1202         rr.explain_buf = 0;
1203         rr.database = srw_req->database;
1204         if (assoc->server)
1205             rr.server_node_ptr = assoc->server->server_node_ptr;
1206         else
1207             rr.server_node_ptr = 0;
1208         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1209         if (assoc->init->bend_explain)
1210             (*assoc->init->bend_explain)(assoc->backend, &rr);
1211         else
1212             srw_bend_explain_default(assoc->backend, &rr);
1213
1214         if (rr.explain_buf)
1215         {
1216             int packing = Z_SRW_recordPacking_string;
1217             if (srw_req->recordPacking)
1218             {
1219                 packing =
1220                     yaz_srw_str_to_pack(srw_req->recordPacking);
1221                 if (packing == -1)
1222                     packing = Z_SRW_recordPacking_string;
1223             }
1224             srw_res->record.recordSchema = rr.schema;
1225             srw_res->record.recordPacking = packing;
1226             srw_res->record.recordData_buf = rr.explain_buf;
1227             srw_res->record.recordData_len = strlen(rr.explain_buf);
1228             srw_res->record.recordPosition = 0;
1229             *http_code = 200;
1230         }
1231     }
1232 }
1233
1234 static void srw_bend_scan(association *assoc, request *req,
1235                           Z_SRW_PDU *sr,
1236                           Z_SRW_scanResponse *srw_res,
1237                           int *http_code)
1238 {
1239     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1240     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1241
1242     *http_code = 200;
1243     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1244     if (srw_res->num_diagnostics == 0 && assoc->init)
1245     {
1246         struct scan_entry *save_entries;
1247
1248         bend_scan_rr *bsrr = (bend_scan_rr *)
1249             odr_malloc (assoc->encode, sizeof(*bsrr));
1250         bsrr->num_bases = 1;
1251         bsrr->basenames = &srw_req->database;
1252
1253         bsrr->num_entries = srw_req->maximumTerms ?
1254             *srw_req->maximumTerms : 10;
1255         bsrr->term_position = srw_req->responsePosition ?
1256             *srw_req->responsePosition : 1;
1257
1258         bsrr->errcode = 0;
1259         bsrr->errstring = 0;
1260         bsrr->referenceId = 0;
1261         bsrr->stream = assoc->encode;
1262         bsrr->print = assoc->print;
1263         bsrr->step_size = odr_intdup(assoc->decode, 0);
1264         bsrr->entries = 0;
1265
1266         if (bsrr->num_entries > 0)
1267         {
1268             int i;
1269             bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1270                                        bsrr->num_entries);
1271             for (i = 0; i<bsrr->num_entries; i++)
1272             {
1273                 bsrr->entries[i].term = 0;
1274                 bsrr->entries[i].occurrences = 0;
1275                 bsrr->entries[i].errcode = 0;
1276                 bsrr->entries[i].errstring = 0;
1277                 bsrr->entries[i].display_term = 0;
1278             }
1279         }
1280         save_entries = bsrr->entries;  /* save it so we can compare later */
1281
1282         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1283             assoc->init->bend_scan)
1284         {
1285             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1286
1287             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1288                                       &bsrr->attributeset,
1289                                       srw_req->scanClause.pqf);
1290             yaz_pqf_destroy(pqf_parser);
1291             bsrr->scanClause = 0;
1292             ((int (*)(void *, bend_scan_rr *))
1293              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1294         }
1295         else if (srw_req->query_type == Z_SRW_query_type_cql
1296                  && assoc->init->bend_scan && assoc->server
1297                  && assoc->server->cql_transform)
1298         {
1299             int srw_error;
1300             bsrr->scanClause = 0;
1301             bsrr->attributeset = 0;
1302             bsrr->term = odr_malloc(assoc->decode, sizeof(*bsrr->term));
1303             srw_error = cql2pqf_scan(assoc->encode,
1304                                      srw_req->scanClause.cql,
1305                                      assoc->server->cql_transform,
1306                                      bsrr->term);
1307             if (srw_error)
1308                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1309                                        &srw_res->num_diagnostics,
1310                                        srw_error, 0);
1311             else
1312             {
1313                 ((int (*)(void *, bend_scan_rr *))
1314                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1315             }
1316         }
1317         else if (srw_req->query_type == Z_SRW_query_type_cql
1318                  && assoc->init->bend_srw_scan)
1319         {
1320             bsrr->term = 0;
1321             bsrr->attributeset = 0;
1322             bsrr->scanClause = srw_req->scanClause.cql;
1323             ((int (*)(void *, bend_scan_rr *))
1324              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1325         }
1326         else
1327         {
1328             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1329                                    &srw_res->num_diagnostics,
1330                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1331         }
1332         if (bsrr->errcode)
1333         {
1334             int srw_error;
1335             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1336             {
1337                 *http_code = 404;
1338                 return;
1339             }
1340             srw_error = yaz_diag_bib1_to_srw (bsrr->errcode);
1341
1342             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1343                                    &srw_res->num_diagnostics,
1344                                    srw_error, bsrr->errstring);
1345         }
1346         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1347         {
1348             int i;
1349             srw_res->terms = (Z_SRW_scanTerm*)
1350                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1351                            bsrr->num_entries);
1352
1353             srw_res->num_terms =  bsrr->num_entries;
1354             for (i = 0; i<bsrr->num_entries; i++)
1355             {
1356                 Z_SRW_scanTerm *t = srw_res->terms + i;
1357                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1358                 t->numberOfRecords =
1359                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1360                 t->displayTerm = 0;
1361                 if (save_entries == bsrr->entries &&
1362                     bsrr->entries[i].display_term)
1363                 {
1364                     /* the entries was _not_ set by the handler. So it's
1365                        safe to test for new member display_term. It is
1366                        NULL'ed by us.
1367                     */
1368                     t->displayTerm = odr_strdup(assoc->encode,
1369                                                 bsrr->entries[i].display_term);
1370                 }
1371                 t->whereInList = 0;
1372             }
1373         }
1374     }
1375     if (log_request)
1376     {
1377         WRBUF wr = wrbuf_alloc();
1378         const char *querytype = 0;
1379         const char *querystr = 0;
1380
1381         switch(srw_req->query_type)
1382         {
1383         case Z_SRW_query_type_pqf:
1384             querytype = "PQF";
1385             querystr = srw_req->scanClause.pqf;
1386             break;
1387         case Z_SRW_query_type_cql:
1388             querytype = "CQL";
1389             querystr = srw_req->scanClause.cql;
1390             break;
1391         default:
1392             querytype = "UNKNOWN";
1393             querystr = "";
1394         }
1395
1396         wrbuf_printf(wr, "SRWScan ");
1397         wrbuf_printf(wr, srw_req->database);
1398         wrbuf_printf(wr, " ");
1399
1400         if (srw_res->num_diagnostics)
1401             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1402         else if (srw_res->num_terms)
1403             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1404         else
1405             wrbuf_printf(wr, "OK - - ");
1406
1407         wrbuf_printf(wr, "%d+%d+0 ",
1408                      (srw_req->responsePosition ?
1409                       *srw_req->responsePosition : 1),
1410                      (srw_req->maximumTerms ?
1411                       *srw_req->maximumTerms : 1));
1412         /* there is no step size in SRU/W ??? */
1413         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1414         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1415         wrbuf_destroy(wr);
1416     }
1417
1418 }
1419
1420 static void srw_bend_update(association *assoc, request *req,
1421                             Z_SRW_PDU *sr,
1422                             Z_SRW_updateResponse *srw_res,
1423                             int *http_code)
1424 {
1425     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1426     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1427     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1428     *http_code = 404;
1429     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1430     if (assoc->init)
1431     {
1432         bend_update_rr rr;
1433         Z_SRW_extra_record *extra = srw_req->extra_record;
1434
1435         rr.stream = assoc->encode;
1436         rr.print = assoc->print;
1437         rr.num_bases = 1;
1438         rr.basenames = &srw_req->database;
1439         rr.operation = srw_req->operation;
1440         rr.operation_status = "failed";
1441         rr.record_id = 0;
1442         rr.record_versions = 0;
1443         rr.num_versions = 0;
1444         rr.record_packing = "string";
1445         rr.record_schema = 0;
1446         rr.record_data = 0;
1447         rr.extra_record_data = 0;
1448         rr.extra_request_data = 0;
1449         rr.extra_response_data = 0;
1450         rr.uri = 0;
1451         rr.message = 0;
1452         rr.details = 0;
1453
1454         *http_code = 200;
1455         if (rr.operation == 0)
1456         {
1457             yaz_add_sru_update_diagnostic(
1458                 assoc->encode, &srw_res->diagnostics,
1459                 &srw_res->num_diagnostics,
1460                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1461                 "action" );
1462             return;
1463         }
1464         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1465         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1466         if (!strcmp( rr.operation, "delete"))
1467         {
1468             if (srw_req->record && !srw_req->record->recordSchema)
1469             {
1470                 rr.record_schema = odr_strdup(
1471                     assoc->encode,
1472                     srw_req->record->recordSchema);
1473             }
1474             if (srw_req->record)
1475             {
1476                 rr.record_data = odr_strdupn(
1477                     assoc->encode,
1478                     srw_req->record->recordData_buf,
1479                     srw_req->record->recordData_len );
1480             }
1481             if (extra && extra->extraRecordData_len)
1482             {
1483                 rr.extra_record_data = odr_strdupn(
1484                     assoc->encode,
1485                     extra->extraRecordData_buf,
1486                     extra->extraRecordData_len );
1487             }
1488             if (srw_req->recordId)
1489                 rr.record_id = srw_req->recordId;
1490             else if (extra && extra->recordIdentifier)
1491                 rr.record_id = extra->recordIdentifier;
1492         }
1493         else if (!strcmp(rr.operation, "replace"))
1494         {
1495             if (srw_req->recordId)
1496                 rr.record_id = srw_req->recordId;
1497             else if (extra && extra->recordIdentifier)
1498                 rr.record_id = extra->recordIdentifier;
1499             else
1500             {
1501                 yaz_add_sru_update_diagnostic(
1502                     assoc->encode, &srw_res->diagnostics,
1503                     &srw_res->num_diagnostics,
1504                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1505                     "recordIdentifier");
1506             }
1507             if (!srw_req->record)
1508             {
1509                 yaz_add_sru_update_diagnostic(
1510                     assoc->encode, &srw_res->diagnostics,
1511                     &srw_res->num_diagnostics,
1512                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1513                     "record");
1514             }
1515             else
1516             {
1517                 if (srw_req->record->recordSchema)
1518                     rr.record_schema = odr_strdup(
1519                         assoc->encode, srw_req->record->recordSchema);
1520                 if (srw_req->record->recordData_len )
1521                 {
1522                     rr.record_data = odr_strdupn(assoc->encode,
1523                                                  srw_req->record->recordData_buf,
1524                                                  srw_req->record->recordData_len );
1525                 }
1526                 else
1527                 {
1528                     yaz_add_sru_update_diagnostic(
1529                         assoc->encode, &srw_res->diagnostics,
1530                         &srw_res->num_diagnostics,
1531                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1532                         "recordData" );
1533                 }
1534             }
1535             if (extra && extra->extraRecordData_len)
1536             {
1537                 rr.extra_record_data = odr_strdupn(
1538                     assoc->encode,
1539                     extra->extraRecordData_buf,
1540                     extra->extraRecordData_len );
1541             }
1542         }
1543         else if (!strcmp(rr.operation, "insert"))
1544         {
1545             if (srw_req->recordId)
1546                 rr.record_id = srw_req->recordId;
1547             else if (extra)
1548                 rr.record_id = extra->recordIdentifier;
1549
1550             if (srw_req->record)
1551             {
1552                 if (srw_req->record->recordSchema)
1553                     rr.record_schema = odr_strdup(
1554                         assoc->encode, srw_req->record->recordSchema);
1555
1556                 if (srw_req->record->recordData_len)
1557                     rr.record_data = odr_strdupn(
1558                         assoc->encode,
1559                         srw_req->record->recordData_buf,
1560                         srw_req->record->recordData_len );
1561             }
1562             if (extra && extra->extraRecordData_len)
1563             {
1564                 rr.extra_record_data = odr_strdupn(
1565                     assoc->encode,
1566                     extra->extraRecordData_buf,
1567                     extra->extraRecordData_len );
1568             }
1569         }
1570         else
1571             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1572                                           &srw_res->num_diagnostics,
1573                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1574                                           rr.operation );
1575
1576         if (srw_req->record)
1577         {
1578             const char *pack_str =
1579                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1580             if (pack_str)
1581                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1582         }
1583
1584         if (srw_req->num_recordVersions)
1585         {
1586             rr.record_versions = srw_req->recordVersions;
1587             rr.num_versions = srw_req->num_recordVersions;
1588         }
1589         if (srw_req->extraRequestData_len)
1590         {
1591             rr.extra_request_data = odr_strdupn(assoc->encode,
1592                                                 srw_req->extraRequestData_buf,
1593                                                 srw_req->extraRequestData_len );
1594         }
1595         if (srw_res->num_diagnostics == 0)
1596         {
1597             if ( assoc->init->bend_srw_update)
1598                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1599             else
1600                 yaz_add_sru_update_diagnostic(
1601                     assoc->encode, &srw_res->diagnostics,
1602                     &srw_res->num_diagnostics,
1603                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1604                     "No Update backend handler");
1605         }
1606
1607         if (rr.uri)
1608             yaz_add_srw_diagnostic_uri(assoc->encode,
1609                                        &srw_res->diagnostics,
1610                                        &srw_res->num_diagnostics,
1611                                        rr.uri,
1612                                        rr.message,
1613                                        rr.details);
1614         srw_res->recordId = rr.record_id;
1615         srw_res->operationStatus = rr.operation_status;
1616         srw_res->recordVersions = rr.record_versions;
1617         srw_res->num_recordVersions = rr.num_versions;
1618         if (srw_res->extraResponseData_len)
1619         {
1620             srw_res->extraResponseData_buf = rr.extra_response_data;
1621             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1622         }
1623         if (srw_res->num_diagnostics == 0 && rr.record_data)
1624         {
1625             srw_res->record = yaz_srw_get_record(assoc->encode);
1626             srw_res->record->recordSchema = rr.record_schema;
1627             if (rr.record_packing)
1628             {
1629                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1630
1631                 if (pack == -1)
1632                 {
1633                     pack = Z_SRW_recordPacking_string;
1634                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1635                             rr.record_packing);
1636                 }
1637                 srw_res->record->recordPacking = pack;
1638             }
1639             srw_res->record->recordData_buf = rr.record_data;
1640             srw_res->record->recordData_len = strlen(rr.record_data);
1641             if (rr.extra_record_data)
1642             {
1643                 Z_SRW_extra_record *ex =
1644                     yaz_srw_get_extra_record(assoc->encode);
1645                 srw_res->extra_record = ex;
1646                 ex->extraRecordData_buf = rr.extra_record_data;
1647                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1648             }
1649         }
1650     }
1651 }
1652
1653 /* check if path is OK (1); BAD (0) */
1654 static int check_path(const char *path)
1655 {
1656     if (*path != '/')
1657         return 0;
1658     if (strstr(path, ".."))
1659         return 0;
1660     return 1;
1661 }
1662
1663 static char *read_file(const char *fname, ODR o, int *sz)
1664 {
1665     char *buf;
1666     FILE *inf = fopen(fname, "rb");
1667     if (!inf)
1668         return 0;
1669
1670     fseek(inf, 0L, SEEK_END);
1671     *sz = ftell(inf);
1672     rewind(inf);
1673     buf = odr_malloc(o, *sz);
1674     fread(buf, 1, *sz, inf);
1675     fclose(inf);
1676     return buf;
1677 }
1678
1679 static void process_http_request(association *assoc, request *req)
1680 {
1681     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1682     ODR o = assoc->encode;
1683     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1684     Z_SRW_PDU *sr = 0;
1685     Z_SOAP *soap_package = 0;
1686     Z_GDU *p = 0;
1687     char *charset = 0;
1688     Z_HTTP_Response *hres = 0;
1689     int keepalive = 1;
1690     const char *stylesheet = 0; /* for now .. set later */
1691     Z_SRW_diagnostic *diagnostic = 0;
1692     int num_diagnostic = 0;
1693     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1694
1695     if (!control_association(assoc, host, 0))
1696     {
1697         p = z_get_HTTP_Response(o, 404);
1698         r = 1;
1699     }
1700     if (r == 2 && assoc->server && assoc->server->docpath
1701         && hreq->path[0] == '/'
1702         &&
1703         /* check if path is a proper prefix of documentroot */
1704         strncmp(hreq->path+1, assoc->server->docpath,
1705                 strlen(assoc->server->docpath))
1706         == 0)
1707     {
1708         if (!check_path(hreq->path))
1709         {
1710             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1711             p = z_get_HTTP_Response(o, 404);
1712         }
1713         else
1714         {
1715             int content_size = 0;
1716             char *content_buf = read_file(hreq->path+1, o, &content_size);
1717             if (!content_buf)
1718             {
1719                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1720                 p = z_get_HTTP_Response(o, 404);
1721             }
1722             else
1723             {
1724                 const char *ctype = 0;
1725                 yaz_mime_types types = yaz_mime_types_create();
1726
1727                 yaz_mime_types_add(types, "xsl", "application/xml");
1728                 yaz_mime_types_add(types, "xml", "application/xml");
1729                 yaz_mime_types_add(types, "css", "text/css");
1730                 yaz_mime_types_add(types, "html", "text/html");
1731                 yaz_mime_types_add(types, "htm", "text/html");
1732                 yaz_mime_types_add(types, "txt", "text/plain");
1733                 yaz_mime_types_add(types, "js", "application/x-javascript");
1734
1735                 yaz_mime_types_add(types, "gif", "image/gif");
1736                 yaz_mime_types_add(types, "png", "image/png");
1737                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1738                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1739
1740                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1741                 if (!ctype)
1742                 {
1743                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1744                     p = z_get_HTTP_Response(o, 404);
1745                 }
1746                 else
1747                 {
1748                     p = z_get_HTTP_Response(o, 200);
1749                     hres = p->u.HTTP_Response;
1750                     hres->content_buf = content_buf;
1751                     hres->content_len = content_size;
1752                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1753                 }
1754                 yaz_mime_types_destroy(types);
1755             }
1756         }
1757         r = 1;
1758     }
1759
1760     if (r == 2)
1761     {
1762         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1763         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1764     }
1765     if (r == 2)  /* not taken */
1766     {
1767         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1768                            &diagnostic, &num_diagnostic);
1769         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1770     }
1771     if (r == 0)  /* decode SRW/SRU OK .. */
1772     {
1773         int http_code = 200;
1774         if (sr->which == Z_SRW_searchRetrieve_request)
1775         {
1776             Z_SRW_PDU *res =
1777                 yaz_srw_get(assoc->encode, Z_SRW_searchRetrieve_response);
1778
1779             stylesheet = sr->u.request->stylesheet;
1780             if (num_diagnostic)
1781             {
1782                 res->u.response->diagnostics = diagnostic;
1783                 res->u.response->num_diagnostics = num_diagnostic;
1784             }
1785             else
1786             {
1787                 srw_bend_search(assoc, req, sr, res->u.response,
1788                                 &http_code);
1789             }
1790             if (http_code == 200)
1791                 soap_package->u.generic->p = res;
1792         }
1793         else if (sr->which == Z_SRW_explain_request)
1794         {
1795             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
1796             stylesheet = sr->u.explain_request->stylesheet;
1797             if (num_diagnostic)
1798             {
1799                 res->u.explain_response->diagnostics = diagnostic;
1800                 res->u.explain_response->num_diagnostics = num_diagnostic;
1801             }
1802             srw_bend_explain(assoc, req, sr,
1803                              res->u.explain_response, &http_code);
1804             if (http_code == 200)
1805                 soap_package->u.generic->p = res;
1806         }
1807         else if (sr->which == Z_SRW_scan_request)
1808         {
1809             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_scan_response);
1810             stylesheet = sr->u.scan_request->stylesheet;
1811             if (num_diagnostic)
1812             {
1813                 res->u.scan_response->diagnostics = diagnostic;
1814                 res->u.scan_response->num_diagnostics = num_diagnostic;
1815             }
1816             srw_bend_scan(assoc, req, sr,
1817                           res->u.scan_response, &http_code);
1818             if (http_code == 200)
1819                 soap_package->u.generic->p = res;
1820         }
1821         else if (sr->which == Z_SRW_update_request)
1822         {
1823             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_update_response);
1824             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1825             if (num_diagnostic)
1826             {
1827                 res->u.update_response->diagnostics = diagnostic;
1828                 res->u.update_response->num_diagnostics = num_diagnostic;
1829             }
1830             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1831             srw_bend_update(assoc, req, sr,
1832                             res->u.update_response, &http_code);
1833             if (http_code == 200)
1834                 soap_package->u.generic->p = res;
1835         }
1836         else
1837         {
1838             yaz_log(log_request, "SOAP ERROR");
1839             /* FIXME - what error, what query */
1840             http_code = 500;
1841             z_soap_error(assoc->encode, soap_package,
1842                          "SOAP-ENV:Client", "Bad method", 0);
1843         }
1844         if (http_code == 200 || http_code == 500)
1845         {
1846             static Z_SOAP_Handler soap_handlers[4] = {
1847 #if YAZ_HAVE_XML2
1848                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1849                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1850                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1851 #endif
1852                 {0, 0, 0}
1853             };
1854             char ctype[60];
1855             int ret;
1856             p = z_get_HTTP_Response(o, 200);
1857             hres = p->u.HTTP_Response;
1858
1859             if (!stylesheet && assoc->server)
1860                 stylesheet = assoc->server->stylesheet;
1861
1862             /* empty stylesheet means NO stylesheet */
1863             if (stylesheet && *stylesheet == '\0')
1864                 stylesheet = 0;
1865
1866             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1867                                        &hres->content_buf, &hres->content_len,
1868                                        soap_handlers, charset, stylesheet);
1869             hres->code = http_code;
1870
1871             strcpy(ctype, "text/xml");
1872             if (charset)
1873             {
1874                 strcat(ctype, "; charset=");
1875                 strcat(ctype, charset);
1876             }
1877             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1878         }
1879         else
1880             p = z_get_HTTP_Response(o, http_code);
1881     }
1882
1883     if (p == 0)
1884         p = z_get_HTTP_Response(o, 500);
1885     hres = p->u.HTTP_Response;
1886     if (!strcmp(hreq->version, "1.0"))
1887     {
1888         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1889         if (v && !strcmp(v, "Keep-Alive"))
1890             keepalive = 1;
1891         else
1892             keepalive = 0;
1893         hres->version = "1.0";
1894     }
1895     else
1896     {
1897         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1898         if (v && !strcmp(v, "close"))
1899             keepalive = 0;
1900         else
1901             keepalive = 1;
1902         hres->version = "1.1";
1903     }
1904     if (!keepalive)
1905     {
1906         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1907         assoc->state = ASSOC_DEAD;
1908         assoc->cs_get_mask = 0;
1909     }
1910     else
1911     {
1912         int t;
1913         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1914
1915         if (alive && isdigit(*(const unsigned char *) alive))
1916             t = atoi(alive);
1917         else
1918             t = 15;
1919         if (t < 0 || t > 3600)
1920             t = 3600;
1921         iochan_settimeout(assoc->client_chan,t);
1922         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1923     }
1924     process_gdu_response(assoc, req, p);
1925 }
1926
1927 static void process_gdu_request(association *assoc, request *req)
1928 {
1929     if (req->gdu_request->which == Z_GDU_Z3950)
1930     {
1931         char *msg = 0;
1932         req->apdu_request = req->gdu_request->u.z3950;
1933         if (process_z_request(assoc, req, &msg) < 0)
1934             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1935     }
1936     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1937         process_http_request(assoc, req);
1938     else
1939     {
1940         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1941     }
1942 }
1943
1944 /*
1945  * Initiate request processing.
1946  */
1947 static int process_z_request(association *assoc, request *req, char **msg)
1948 {
1949     int fd = -1;
1950     Z_APDU *res;
1951     int retval;
1952
1953     *msg = "Unknown Error";
1954     assert(req && req->state == REQUEST_IDLE);
1955     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1956     {
1957         *msg = "Missing InitRequest";
1958         return -1;
1959     }
1960     switch (req->apdu_request->which)
1961     {
1962     case Z_APDU_initRequest:
1963         res = process_initRequest(assoc, req); break;
1964     case Z_APDU_searchRequest:
1965         res = process_searchRequest(assoc, req, &fd); break;
1966     case Z_APDU_presentRequest:
1967         res = process_presentRequest(assoc, req, &fd); break;
1968     case Z_APDU_scanRequest:
1969         if (assoc->init->bend_scan)
1970             res = process_scanRequest(assoc, req, &fd);
1971         else
1972         {
1973             *msg = "Cannot handle Scan APDU";
1974             return -1;
1975         }
1976         break;
1977     case Z_APDU_extendedServicesRequest:
1978         if (assoc->init->bend_esrequest)
1979             res = process_ESRequest(assoc, req, &fd);
1980         else
1981         {
1982             *msg = "Cannot handle Extended Services APDU";
1983             return -1;
1984         }
1985         break;
1986     case Z_APDU_sortRequest:
1987         if (assoc->init->bend_sort)
1988             res = process_sortRequest(assoc, req, &fd);
1989         else
1990         {
1991             *msg = "Cannot handle Sort APDU";
1992             return -1;
1993         }
1994         break;
1995     case Z_APDU_close:
1996         process_close(assoc, req);
1997         return 0;
1998     case Z_APDU_deleteResultSetRequest:
1999         if (assoc->init->bend_delete)
2000             res = process_deleteRequest(assoc, req, &fd);
2001         else
2002         {
2003             *msg = "Cannot handle Delete APDU";
2004             return -1;
2005         }
2006         break;
2007     case Z_APDU_segmentRequest:
2008         if (assoc->init->bend_segment)
2009         {
2010             res = process_segmentRequest (assoc, req);
2011         }
2012         else
2013         {
2014             *msg = "Cannot handle Segment APDU";
2015             return -1;
2016         }
2017         break;
2018     case Z_APDU_triggerResourceControlRequest:
2019         return 0;
2020     default:
2021         *msg = "Bad APDU received";
2022         return -1;
2023     }
2024     if (res)
2025     {
2026         yaz_log(YLOG_DEBUG, "  result immediately available");
2027         retval = process_z_response(assoc, req, res);
2028     }
2029     else if (fd < 0)
2030     {
2031         yaz_log(YLOG_DEBUG, "  result unavailble");
2032         retval = 0;
2033     }
2034     else /* no result yet - one will be provided later */
2035     {
2036         IOCHAN chan;
2037
2038         /* Set up an I/O handler for the fd supplied by the backend */
2039
2040         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2041         req->state = REQUEST_PENDING;
2042         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2043             abort();
2044         iochan_setdata(chan, assoc);
2045         retval = 0;
2046     }
2047     return retval;
2048 }
2049
2050 /*
2051  * Handle message from the backend.
2052  */
2053 void backend_response(IOCHAN i, int event)
2054 {
2055     association *assoc = (association *)iochan_getdata(i);
2056     request *req = request_head(&assoc->incoming);
2057     Z_APDU *res;
2058     int fd;
2059
2060     yaz_log(YLOG_DEBUG, "backend_response");
2061     assert(assoc && req && req->state != REQUEST_IDLE);
2062     /* determine what it is we're waiting for */
2063     switch (req->apdu_request->which)
2064     {
2065         case Z_APDU_searchRequest:
2066             res = response_searchRequest(assoc, req, 0, &fd); break;
2067 #if 0
2068         case Z_APDU_presentRequest:
2069             res = response_presentRequest(assoc, req, 0, &fd); break;
2070         case Z_APDU_scanRequest:
2071             res = response_scanRequest(assoc, req, 0, &fd); break;
2072 #endif
2073         default:
2074             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2075             abort();
2076     }
2077     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2078     {
2079         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2080         do_close(assoc, Z_Close_systemProblem, 0);
2081         iochan_destroy(i);
2082         return;
2083     }
2084     else if (!res) /* no result yet - try again later */
2085     {
2086         yaz_log(YLOG_DEBUG, "   no result yet");
2087         iochan_setfd(i, fd); /* in case fd has changed */
2088     }
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(*res));
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 *version;
2167     char options[140];
2168     statserv_options_block *cb = 0;  /* by default no control for backend */
2169
2170     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2171         cb = statserv_getcontrol();  /* got control block for backend */
2172
2173     if (cb && assoc->backend)
2174         (*cb->bend_close)(assoc->backend);
2175
2176     yaz_log(log_requestdetail, "Got initRequest");
2177     if (req->implementationId)
2178         yaz_log(log_requestdetail, "Id:        %s",
2179                 req->implementationId);
2180     if (req->implementationName)
2181         yaz_log(log_requestdetail, "Name:      %s",
2182                 req->implementationName);
2183     if (req->implementationVersion)
2184         yaz_log(log_requestdetail, "Version:   %s",
2185                 req->implementationVersion);
2186
2187     assoc_init_reset(assoc);
2188
2189     assoc->init->auth = req->idAuthentication;
2190     assoc->init->referenceId = req->referenceId;
2191
2192     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2193     {
2194         Z_CharSetandLanguageNegotiation *negotiation =
2195             yaz_get_charneg_record (req->otherInfo);
2196         if (negotiation &&
2197             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2198             assoc->init->charneg_request = negotiation;
2199     }
2200
2201     assoc->backend = 0;
2202     if (cb)
2203     {
2204         if (req->implementationVersion)
2205             yaz_log(log_requestdetail, "Config:    %s",
2206                     cb->configname);
2207
2208         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2209
2210         /* we have a backend control block, so call that init function */
2211         if (!(binitres = (*cb->bend_init)(assoc->init)))
2212         {
2213             yaz_log(YLOG_WARN, "Bad response from backend.");
2214             return 0;
2215         }
2216         assoc->backend = binitres->handle;
2217     }
2218     else
2219     {
2220         /* no backend. return error */
2221         binitres = odr_malloc(assoc->encode, sizeof(*binitres));
2222         binitres->errstring = 0;
2223         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2224         iochan_settimeout(assoc->client_chan, 10);
2225     }
2226     if ((assoc->init->bend_sort))
2227         yaz_log (YLOG_DEBUG, "Sort handler installed");
2228     if ((assoc->init->bend_search))
2229         yaz_log (YLOG_DEBUG, "Search handler installed");
2230     if ((assoc->init->bend_present))
2231         yaz_log (YLOG_DEBUG, "Present handler installed");
2232     if ((assoc->init->bend_esrequest))
2233         yaz_log (YLOG_DEBUG, "ESRequest handler installed");
2234     if ((assoc->init->bend_delete))
2235         yaz_log (YLOG_DEBUG, "Delete handler installed");
2236     if ((assoc->init->bend_scan))
2237         yaz_log (YLOG_DEBUG, "Scan handler installed");
2238     if ((assoc->init->bend_segment))
2239         yaz_log (YLOG_DEBUG, "Segment handler installed");
2240
2241     resp->referenceId = req->referenceId;
2242     *options = '\0';
2243     /* let's tell the client what we can do */
2244     if (ODR_MASK_GET(req->options, Z_Options_search))
2245     {
2246         ODR_MASK_SET(resp->options, Z_Options_search);
2247         strcat(options, "srch");
2248     }
2249     if (ODR_MASK_GET(req->options, Z_Options_present))
2250     {
2251         ODR_MASK_SET(resp->options, Z_Options_present);
2252         strcat(options, " prst");
2253     }
2254     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2255         assoc->init->bend_delete)
2256     {
2257         ODR_MASK_SET(resp->options, Z_Options_delSet);
2258         strcat(options, " del");
2259     }
2260     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2261         assoc->init->bend_esrequest)
2262     {
2263         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2264         strcat (options, " extendedServices");
2265     }
2266     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2267     {
2268         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2269         strcat(options, " namedresults");
2270     }
2271     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2272     {
2273         ODR_MASK_SET(resp->options, Z_Options_scan);
2274         strcat(options, " scan");
2275     }
2276     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2277     {
2278         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2279         strcat(options, " concurrop");
2280     }
2281     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2282     {
2283         ODR_MASK_SET(resp->options, Z_Options_sort);
2284         strcat(options, " sort");
2285     }
2286
2287     if (!assoc->init->charneg_response && !assoc->init->charneg_request)
2288     {
2289         if (assoc->init->query_charset)
2290         {
2291             assoc->init->charneg_response = yaz_set_response_charneg(
2292                 assoc->encode, assoc->init->query_charset, 0, 0);
2293         }
2294         else
2295         {
2296             yaz_log(YLOG_WARN, "default query_charset not defined by backend");
2297         }
2298     }
2299     if (assoc->init->charneg_response
2300         && ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2301     {
2302         Z_OtherInformation **p;
2303         Z_OtherInformationUnit *p0;
2304
2305         yaz_oi_APDU(apdu, &p);
2306
2307         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
2308             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2309
2310             p0->which = Z_OtherInfo_externallyDefinedInfo;
2311             p0->information.externallyDefinedInfo =
2312                 assoc->init->charneg_response;
2313         }
2314         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2315         strcat(options, " negotiation");
2316     }
2317     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2318         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2319
2320     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2321     {
2322         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2323         assoc->version = 1; /* 1 & 2 are equivalent */
2324     }
2325     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2326     {
2327         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2328         assoc->version = 2;
2329     }
2330     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2331     {
2332         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2333         assoc->version = 3;
2334     }
2335
2336     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2337
2338     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2339         assoc->maximumRecordSize = *req->maximumRecordSize;
2340
2341     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2342         assoc->preferredMessageSize = *req->preferredMessageSize;
2343
2344     resp->preferredMessageSize = &assoc->preferredMessageSize;
2345     resp->maximumRecordSize = &assoc->maximumRecordSize;
2346
2347     resp->implementationId = odr_prepend(assoc->encode,
2348                 assoc->init->implementation_id,
2349                 resp->implementationId);
2350
2351     resp->implementationName = odr_prepend(assoc->encode,
2352                 assoc->init->implementation_name,
2353                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2354
2355     version = odr_strdup(assoc->encode, "$Revision: 1.116 $");
2356     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2357         version[strlen(version)-2] = '\0';
2358     resp->implementationVersion = odr_prepend(assoc->encode,
2359                 assoc->init->implementation_version,
2360                 odr_prepend(assoc->encode, &version[11],
2361                             resp->implementationVersion));
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     if (log_request)
2372     {
2373         if (!req->idAuthentication)
2374             yaz_log(log_request, "Auth none");
2375         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2376         {
2377             const char *open = req->idAuthentication->u.open;
2378             const char *slash = strchr(open, '/');
2379             int len;
2380             if (slash)
2381                 len = slash - open;
2382             else
2383                 len = strlen(open);
2384                 yaz_log(log_request, "Auth open %.*s", len, open);
2385         }
2386         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2387         {
2388             const char *user = req->idAuthentication->u.idPass->userId;
2389             const char *group = req->idAuthentication->u.idPass->groupId;
2390             yaz_log(log_request, "Auth idPass %s %s",
2391                     user ? user : "-", group ? group : "-");
2392         }
2393         else if (req->idAuthentication->which
2394                  == Z_IdAuthentication_anonymous)
2395         {
2396             yaz_log(log_request, "Auth anonymous");
2397         }
2398         else
2399         {
2400             yaz_log(log_request, "Auth other");
2401         }
2402     }
2403     if (log_request)
2404     {
2405         WRBUF wr = wrbuf_alloc();
2406         wrbuf_printf(wr, "Init ");
2407         if (binitres->errcode)
2408             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2409         else
2410             wrbuf_printf(wr, "OK -");
2411         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2412                      (req->implementationId ? req->implementationId :"-"),
2413                      (req->implementationName ?
2414                       req->implementationName : "-"),
2415                      (req->implementationVersion ?
2416                       req->implementationVersion : "-")
2417             );
2418         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2419         wrbuf_destroy(wr);
2420     }
2421     return apdu;
2422 }
2423
2424 /*
2425  * Set the specified `errcode' and `errstring' into a UserInfo-1
2426  * external to be returned to the client in accordance with Z35.90
2427  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2428  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2429  */
2430 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2431 {
2432     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2433         addinfo ? " -- " : "", addinfo ? addinfo : "");
2434     return zget_init_diagnostics(odr, error, addinfo);
2435 }
2436
2437 /*
2438  * nonsurrogate diagnostic record.
2439  */
2440 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2441 {
2442     Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec));
2443
2444     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2445             addinfo ? " -- " : "", addinfo ? addinfo : "");
2446
2447     rec->which = Z_Records_NSD;
2448     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2449                                                            error, addinfo);
2450     return rec;
2451 }
2452
2453 /*
2454  * surrogate diagnostic.
2455  */
2456 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2457                                           const char *dbname,
2458                                           int error, const char *addinfo)
2459 {
2460     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2461             addinfo ? " -- " : "", addinfo ? addinfo : "");
2462     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2463 }
2464
2465 static Z_Records *pack_records(association *a, char *setname, int start,
2466                                int *num, Z_RecordComposition *comp,
2467                                int *next, int *pres,
2468                                Z_ReferenceId *referenceId,
2469                                int *oid, int *errcode)
2470 {
2471     int recno, total_length = 0, toget = *num, dumped_records = 0;
2472     Z_Records *records =
2473         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
2474     Z_NamePlusRecordList *reclist =
2475         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
2476     Z_NamePlusRecord **list =
2477         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
2478
2479     records->which = Z_Records_DBOSD;
2480     records->u.databaseOrSurDiagnostics = reclist;
2481     reclist->num_records = 0;
2482     reclist->records = list;
2483     *pres = Z_PresentStatus_success;
2484     *num = 0;
2485     *next = 0;
2486
2487     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2488     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2489         a->maximumRecordSize);
2490     for (recno = start; reclist->num_records < toget; recno++)
2491     {
2492         bend_fetch_rr freq;
2493         Z_NamePlusRecord *thisrec;
2494         int this_length = 0;
2495         /*
2496          * we get the number of bytes allocated on the stream before any
2497          * allocation done by the backend - this should give us a reasonable
2498          * idea of the total size of the data so far.
2499          */
2500         total_length = odr_total(a->encode) - dumped_records;
2501         freq.errcode = 0;
2502         freq.errstring = 0;
2503         freq.basename = 0;
2504         freq.len = 0;
2505         freq.record = 0;
2506         freq.last_in_set = 0;
2507         freq.setname = setname;
2508         freq.surrogate_flag = 0;
2509         freq.number = recno;
2510         freq.comp = comp;
2511         freq.request_format = oid;
2512         freq.output_format = 0;
2513         freq.stream = a->encode;
2514         freq.print = a->print;
2515         freq.referenceId = referenceId;
2516         freq.schema = 0;
2517
2518         retrieve_fetch(a, &freq);
2519
2520         *next = freq.last_in_set ? 0 : recno + 1;
2521
2522         /* backend should be able to signal whether error is system-wide
2523            or only pertaining to current record */
2524         if (freq.errcode)
2525         {
2526             if (!freq.surrogate_flag)
2527             {
2528                 char s[20];
2529                 *pres = Z_PresentStatus_failure;
2530                 /* for 'present request out of range',
2531                    set addinfo to record position if not set */
2532                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2533                                 freq.errstring == 0)
2534                 {
2535                     sprintf (s, "%d", recno);
2536                     freq.errstring = s;
2537                 }
2538                 if (errcode)
2539                     *errcode = freq.errcode;
2540                 return diagrec(a, freq.errcode, freq.errstring);
2541             }
2542             reclist->records[reclist->num_records] =
2543                 surrogatediagrec(a, freq.basename, freq.errcode,
2544                                  freq.errstring);
2545             reclist->num_records++;
2546             continue;
2547         }
2548         if (freq.record == 0)  /* no error and no record ? */
2549         {
2550             *next = 0;   /* signal end-of-set and stop */
2551             break;
2552         }
2553         if (freq.len >= 0)
2554             this_length = freq.len;
2555         else
2556             this_length = odr_total(a->encode) - total_length - dumped_records;
2557         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2558             this_length, total_length, dumped_records);
2559         if (a->preferredMessageSize > 0 &&
2560                 this_length + total_length > a->preferredMessageSize)
2561         {
2562             /* record is small enough, really */
2563             if (this_length <= a->preferredMessageSize && recno > start)
2564             {
2565                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2566                 *pres = Z_PresentStatus_partial_2;
2567                 break;
2568             }
2569             /* record can only be fetched by itself */
2570             if (this_length < a->maximumRecordSize)
2571             {
2572                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2573                 if (toget > 1)
2574                 {
2575                     yaz_log(YLOG_DEBUG, "  Dropped it");
2576                     reclist->records[reclist->num_records] =
2577                          surrogatediagrec(a, freq.basename, 16, 0);
2578                     reclist->num_records++;
2579                     dumped_records += this_length;
2580                     continue;
2581                 }
2582             }
2583             else /* too big entirely */
2584             {
2585                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2586                         this_length, a->maximumRecordSize);
2587                 reclist->records[reclist->num_records] =
2588                     surrogatediagrec(a, freq.basename, 17, 0);
2589                 reclist->num_records++;
2590                 dumped_records += this_length;
2591                 continue;
2592             }
2593         }
2594
2595         if (!(thisrec = (Z_NamePlusRecord *)
2596               odr_malloc(a->encode, sizeof(*thisrec))))
2597             return 0;
2598         if (freq.basename)
2599             thisrec->databaseName = odr_strdup(a->encode, freq.basename);
2600         else
2601             thisrec->databaseName = 0;
2602         thisrec->which = Z_NamePlusRecord_databaseRecord;
2603
2604         if (!freq.output_format)
2605             freq.output_format = freq.request_format;
2606         thisrec->u.databaseRecord = z_ext_record_oid(
2607             a->encode, freq.output_format, freq.record, freq.len);
2608         if (!thisrec->u.databaseRecord)
2609             return 0;
2610         reclist->records[reclist->num_records] = thisrec;
2611         reclist->num_records++;
2612     }
2613     *num = reclist->num_records;
2614     return records;
2615 }
2616
2617 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2618     int *fd)
2619 {
2620     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2621     bend_search_rr *bsrr =
2622         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
2623
2624     yaz_log(log_requestdetail, "Got SearchRequest.");
2625     bsrr->fd = fd;
2626     bsrr->request = reqb;
2627     bsrr->association = assoc;
2628     bsrr->referenceId = req->referenceId;
2629     save_referenceId (reqb, bsrr->referenceId);
2630     bsrr->srw_sortKeys = 0;
2631     bsrr->srw_setname = 0;
2632     bsrr->srw_setnameIdleTime = 0;
2633     bsrr->estimated_hit_count = 0;
2634     bsrr->partial_resultset = 0;
2635
2636     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2637     if (req->databaseNames)
2638     {
2639         int i;
2640         for (i = 0; i < req->num_databaseNames; i++)
2641             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2642     }
2643
2644     yaz_log_zquery_level(log_requestdetail,req->query);
2645
2646     if (assoc->init->bend_search)
2647     {
2648         bsrr->setname = req->resultSetName;
2649         bsrr->replace_set = *req->replaceIndicator;
2650         bsrr->num_bases = req->num_databaseNames;
2651         bsrr->basenames = req->databaseNames;
2652         bsrr->query = req->query;
2653         bsrr->stream = assoc->encode;
2654         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2655         bsrr->decode = assoc->decode;
2656         bsrr->print = assoc->print;
2657         bsrr->hits = 0;
2658         bsrr->errcode = 0;
2659         bsrr->errstring = NULL;
2660         bsrr->search_info = NULL;
2661
2662         if (assoc->server && assoc->server->cql_transform
2663             && req->query->which == Z_Query_type_104
2664             && req->query->u.type_104->which == Z_External_CQL)
2665         {
2666             /* have a CQL query and a CQL to PQF transform .. */
2667             int srw_errcode =
2668                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2669                         assoc->server->cql_transform, bsrr->query);
2670             if (srw_errcode)
2671                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2672         }
2673         if (!bsrr->errcode)
2674             (assoc->init->bend_search)(assoc->backend, bsrr);
2675         if (!bsrr->request)  /* backend not ready with the search response */
2676             return 0;  /* should not be used any more */
2677     }
2678     else
2679     {
2680         /* FIXME - make a diagnostic for it */
2681         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2682     }
2683     return response_searchRequest(assoc, reqb, bsrr, fd);
2684 }
2685
2686 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2687
2688 /*
2689  * Prepare a searchresponse based on the backend results. We probably want
2690  * to look at making the fetching of records nonblocking as well, but
2691  * so far, we'll keep things simple.
2692  * If bsrt is null, that means we're called in response to a communications
2693  * event, and we'll have to get the response for ourselves.
2694  */
2695 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2696     bend_search_rr *bsrt, int *fd)
2697 {
2698     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2699     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2700     Z_SearchResponse *resp = (Z_SearchResponse *)
2701         odr_malloc (assoc->encode, sizeof(*resp));
2702     int *nulint = odr_intdup (assoc->encode, 0);
2703     int *next = odr_intdup(assoc->encode, 0);
2704     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2705     int returnedrecs = 0;
2706
2707     apdu->which = Z_APDU_searchResponse;
2708     apdu->u.searchResponse = resp;
2709     resp->referenceId = req->referenceId;
2710     resp->additionalSearchInfo = 0;
2711     resp->otherInfo = 0;
2712     *fd = -1;
2713     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2714     {
2715         yaz_log(YLOG_FATAL, "Bad result from backend");
2716         return 0;
2717     }
2718     else if (bsrt->errcode)
2719     {
2720         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2721         resp->resultCount = nulint;
2722         resp->numberOfRecordsReturned = nulint;
2723         resp->nextResultSetPosition = nulint;
2724         resp->searchStatus = nulint;
2725         resp->resultSetStatus = none;
2726         resp->presentStatus = 0;
2727     }
2728     else
2729     {
2730         bool_t *sr = odr_intdup(assoc->encode, 1);
2731         int *toget = odr_intdup(assoc->encode, 0);
2732         Z_RecordComposition comp, *compp = 0;
2733
2734         yaz_log (log_requestdetail, "resultCount: %d", bsrt->hits);
2735
2736         resp->records = 0;
2737         resp->resultCount = &bsrt->hits;
2738
2739         comp.which = Z_RecordComp_simple;
2740         /* how many records does the user agent want, then? */
2741         if (bsrt->hits <= *req->smallSetUpperBound)
2742         {
2743             *toget = bsrt->hits;
2744             if ((comp.u.simple = req->smallSetElementSetNames))
2745                 compp = &comp;
2746         }
2747         else if (bsrt->hits < *req->largeSetLowerBound)
2748         {
2749             *toget = *req->mediumSetPresentNumber;
2750             if (*toget > bsrt->hits)
2751                 *toget = bsrt->hits;
2752             if ((comp.u.simple = req->mediumSetElementSetNames))
2753                 compp = &comp;
2754         }
2755         else
2756             *toget = 0;
2757
2758         if (*toget && !resp->records)
2759         {
2760             int *presst = odr_intdup(assoc->encode, 0);
2761             /* Call bend_present if defined */
2762             if (assoc->init->bend_present)
2763             {
2764                 bend_present_rr *bprr = (bend_present_rr *)
2765                     nmem_malloc (reqb->request_mem, sizeof(*bprr));
2766                 bprr->setname = req->resultSetName;
2767                 bprr->start = 1;
2768                 bprr->number = *toget;
2769                 bprr->format = req->preferredRecordSyntax;
2770                 bprr->comp = compp;
2771                 bprr->referenceId = req->referenceId;
2772                 bprr->stream = assoc->encode;
2773                 bprr->print = assoc->print;
2774                 bprr->request = reqb;
2775                 bprr->association = assoc;
2776                 bprr->errcode = 0;
2777                 bprr->errstring = NULL;
2778                 (*assoc->init->bend_present)(assoc->backend, bprr);
2779
2780                 if (!bprr->request)
2781                     return 0;
2782                 if (bprr->errcode)
2783                 {
2784                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2785                     *resp->presentStatus = Z_PresentStatus_failure;
2786                 }
2787             }
2788
2789             if (!resp->records)
2790                 resp->records = pack_records(
2791                     assoc, req->resultSetName, 1,
2792                     toget, compp, next, presst, req->referenceId,
2793                     req->preferredRecordSyntax, NULL);
2794             if (!resp->records)
2795                 return 0;
2796             resp->numberOfRecordsReturned = toget;
2797             returnedrecs = *toget;
2798             resp->presentStatus = presst;
2799         }
2800         else
2801         {
2802             if (*resp->resultCount)
2803                 *next = 1;
2804             resp->numberOfRecordsReturned = nulint;
2805             resp->presentStatus = 0;
2806         }
2807         resp->nextResultSetPosition = next;
2808         resp->searchStatus = sr;
2809         resp->resultSetStatus = 0;
2810         if (bsrt->estimated_hit_count)
2811         {
2812             resp->resultSetStatus = odr_intdup(assoc->encode,
2813                                                Z_SearchResponse_estimate);
2814         }
2815         else if (bsrt->partial_resultset)
2816         {
2817             resp->resultSetStatus = odr_intdup(assoc->encode,
2818                                                Z_SearchResponse_subset);
2819         }
2820     }
2821     resp->additionalSearchInfo = bsrt->search_info;
2822
2823     if (log_request)
2824     {
2825         int i;
2826         WRBUF wr = wrbuf_alloc();
2827
2828         for (i = 0 ; i < req->num_databaseNames; i++){
2829             if (i)
2830                 wrbuf_printf(wr, "+");
2831             wrbuf_printf(wr, req->databaseNames[i]);
2832         }
2833         wrbuf_printf(wr, " ");
2834
2835         if (bsrt->errcode)
2836             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2837         else
2838             wrbuf_printf(wr, "OK %d", bsrt->hits);
2839         wrbuf_printf(wr, " %s 1+%d ",
2840                      req->resultSetName, returnedrecs);
2841         yaz_query_to_wrbuf(wr, req->query);
2842
2843         yaz_log(log_request, "Search %s", wrbuf_cstr(wr));
2844         wrbuf_destroy(wr);
2845     }
2846     return apdu;
2847 }
2848
2849 /*
2850  * Maybe we got a little over-friendly when we designed bend_fetch to
2851  * get only one record at a time. Some backends can optimise multiple-record
2852  * fetches, and at any rate, there is some overhead involved in
2853  * all that selecting and hopping around. Problem is, of course, that the
2854  * frontend can't know ahead of time how many records it'll need to
2855  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2856  * is downright lousy as a bulk data transfer protocol.
2857  *
2858  * To start with, we'll do the fetching of records from the backend
2859  * in one operation: To save some trips in and out of the event-handler,
2860  * and to simplify the interface to pack_records. At any rate, asynch
2861  * operation is more fun in operations that have an unpredictable execution
2862  * speed - which is normally more true for search than for present.
2863  */
2864 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2865                                       int *fd)
2866 {
2867     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2868     Z_APDU *apdu;
2869     Z_PresentResponse *resp;
2870     int *next;
2871     int *num;
2872     int errcode = 0;
2873     const char *errstring = 0;
2874
2875     yaz_log(log_requestdetail, "Got PresentRequest.");
2876
2877     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2878     resp->records = 0;
2879     resp->presentStatus = odr_intdup(assoc->encode, 0);
2880     if (assoc->init->bend_present)
2881     {
2882         bend_present_rr *bprr = (bend_present_rr *)
2883             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2884         bprr->setname = req->resultSetId;
2885         bprr->start = *req->resultSetStartPoint;
2886         bprr->number = *req->numberOfRecordsRequested;
2887         bprr->format = req->preferredRecordSyntax;
2888         bprr->comp = req->recordComposition;
2889         bprr->referenceId = req->referenceId;
2890         bprr->stream = assoc->encode;
2891         bprr->print = assoc->print;
2892         bprr->request = reqb;
2893         bprr->association = assoc;
2894         bprr->errcode = 0;
2895         bprr->errstring = NULL;
2896         (*assoc->init->bend_present)(assoc->backend, bprr);
2897
2898         if (!bprr->request)
2899             return 0; /* should not happen */
2900         if (bprr->errcode)
2901         {
2902             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2903             *resp->presentStatus = Z_PresentStatus_failure;
2904             errcode = bprr->errcode;
2905             errstring = bprr->errstring;
2906         }
2907     }
2908     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2909     next = odr_intdup(assoc->encode, 0);
2910     num = odr_intdup(assoc->encode, 0);
2911
2912     apdu->which = Z_APDU_presentResponse;
2913     apdu->u.presentResponse = resp;
2914     resp->referenceId = req->referenceId;
2915     resp->otherInfo = 0;
2916
2917     if (!resp->records)
2918     {
2919         *num = *req->numberOfRecordsRequested;
2920         resp->records =
2921             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2922                          num, req->recordComposition, next,
2923                          resp->presentStatus,
2924                          req->referenceId, req->preferredRecordSyntax,
2925                          &errcode);
2926     }
2927     if (log_request)
2928     {
2929         WRBUF wr = wrbuf_alloc();
2930         wrbuf_printf(wr, "Present ");
2931
2932         if (*resp->presentStatus == Z_PresentStatus_failure)
2933             wrbuf_printf(wr, "ERROR %d ", errcode);
2934         else if (*resp->presentStatus == Z_PresentStatus_success)
2935             wrbuf_printf(wr, "OK -  ");
2936         else
2937             wrbuf_printf(wr, "Partial %d - ", *resp->presentStatus);
2938
2939         wrbuf_printf(wr, " %s %d+%d ",
2940                 req->resultSetId, *req->resultSetStartPoint,
2941                 *req->numberOfRecordsRequested);
2942         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
2943         wrbuf_destroy(wr);
2944     }
2945     if (!resp->records)
2946         return 0;
2947     resp->numberOfRecordsReturned = num;
2948     resp->nextResultSetPosition = next;
2949
2950     return apdu;
2951 }
2952
2953 /*
2954  * Scan was implemented rather in a hurry, and with support for only the basic
2955  * elements of the service in the backend API. Suggestions are welcome.
2956  */
2957 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2958 {
2959     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2960     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2961     Z_ScanResponse *res = (Z_ScanResponse *)
2962         odr_malloc (assoc->encode, sizeof(*res));
2963     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2964     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2965     Z_ListEntries *ents = (Z_ListEntries *)
2966         odr_malloc (assoc->encode, sizeof(*ents));
2967     Z_DiagRecs *diagrecs_p = NULL;
2968     bend_scan_rr *bsrr = (bend_scan_rr *)
2969         odr_malloc (assoc->encode, sizeof(*bsrr));
2970     struct scan_entry *save_entries;
2971
2972     yaz_log(log_requestdetail, "Got ScanRequest");
2973
2974     apdu->which = Z_APDU_scanResponse;
2975     apdu->u.scanResponse = res;
2976     res->referenceId = req->referenceId;
2977
2978     /* if step is absent, set it to 0 */
2979     res->stepSize = odr_intdup(assoc->encode, 0);
2980     if (req->stepSize)
2981         *res->stepSize = *req->stepSize;
2982
2983     res->scanStatus = scanStatus;
2984     res->numberOfEntriesReturned = numberOfEntriesReturned;
2985     res->positionOfTerm = 0;
2986     res->entries = ents;
2987     ents->num_entries = 0;
2988     ents->entries = NULL;
2989     ents->num_nonsurrogateDiagnostics = 0;
2990     ents->nonsurrogateDiagnostics = NULL;
2991     res->attributeSet = 0;
2992     res->otherInfo = 0;
2993
2994     if (req->databaseNames)
2995     {
2996         int i;
2997         for (i = 0; i < req->num_databaseNames; i++)
2998             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2999     }
3000     bsrr->scanClause = 0;
3001     bsrr->errcode = 0;
3002     bsrr->errstring = 0;
3003     bsrr->num_bases = req->num_databaseNames;
3004     bsrr->basenames = req->databaseNames;
3005     bsrr->num_entries = *req->numberOfTermsRequested;
3006     bsrr->term = req->termListAndStartPoint;
3007     bsrr->referenceId = req->referenceId;
3008     bsrr->stream = assoc->encode;
3009     bsrr->print = assoc->print;
3010     bsrr->step_size = res->stepSize;
3011     bsrr->entries = 0;
3012     /* For YAZ 2.0 and earlier it was the backend handler that
3013        initialized entries (member display_term did not exist)
3014        YAZ 2.0 and later sets 'entries'  and initialize all members
3015        including 'display_term'. If YAZ 2.0 or later sees that
3016        entries was modified - we assume that it is an old handler and
3017        that 'display_term' is _not_ set.
3018     */
3019     if (bsrr->num_entries > 0)
3020     {
3021         int i;
3022         bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3023                                    bsrr->num_entries);
3024         for (i = 0; i<bsrr->num_entries; i++)
3025         {
3026             bsrr->entries[i].term = 0;
3027             bsrr->entries[i].occurrences = 0;
3028             bsrr->entries[i].errcode = 0;
3029             bsrr->entries[i].errstring = 0;
3030             bsrr->entries[i].display_term = 0;
3031         }
3032     }
3033     save_entries = bsrr->entries;  /* save it so we can compare later */
3034
3035     bsrr->attributeset = req->attributeSet;
3036     log_scan_term_level (log_requestdetail, req->termListAndStartPoint,
3037             bsrr->attributeset);
3038     bsrr->term_position = req->preferredPositionInResponse ?
3039         *req->preferredPositionInResponse : 1;
3040
3041     ((int (*)(void *, bend_scan_rr *))
3042      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3043
3044     if (bsrr->errcode)
3045         diagrecs_p = zget_DiagRecs(assoc->encode,
3046                                    bsrr->errcode, bsrr->errstring);
3047     else
3048     {
3049         int i;
3050         Z_Entry **tab = (Z_Entry **)
3051             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
3052
3053         if (bsrr->status == BEND_SCAN_PARTIAL)
3054             *scanStatus = Z_Scan_partial_5;
3055         else
3056             *scanStatus = Z_Scan_success;
3057         ents->entries = tab;
3058         ents->num_entries = bsrr->num_entries;
3059         res->numberOfEntriesReturned = &ents->num_entries;
3060         res->positionOfTerm = &bsrr->term_position;
3061         for (i = 0; i < bsrr->num_entries; i++)
3062         {
3063             Z_Entry *e;
3064             Z_TermInfo *t;
3065             Odr_oct *o;
3066
3067             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3068             if (bsrr->entries[i].occurrences >= 0)
3069             {
3070                 e->which = Z_Entry_termInfo;
3071                 e->u.termInfo = t = (Z_TermInfo *)
3072                     odr_malloc(assoc->encode, sizeof(*t));
3073                 t->suggestedAttributes = 0;
3074                 t->displayTerm = 0;
3075                 if (save_entries == bsrr->entries &&
3076                     bsrr->entries[i].display_term)
3077                 {
3078                     /* the entries was _not_ set by the handler. So it's
3079                        safe to test for new member display_term. It is
3080                        NULL'ed by us.
3081                     */
3082                     t->displayTerm = odr_strdup(assoc->encode,
3083                                                 bsrr->entries[i].display_term);
3084                 }
3085                 t->alternativeTerm = 0;
3086                 t->byAttributes = 0;
3087                 t->otherTermInfo = 0;
3088                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3089                 t->term = (Z_Term *)
3090                     odr_malloc(assoc->encode, sizeof(*t->term));
3091                 t->term->which = Z_Term_general;
3092                 t->term->u.general = o =
3093                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3094                 o->buf = (unsigned char *)
3095                     odr_malloc(assoc->encode, o->len = o->size =
3096                                strlen(bsrr->entries[i].term));
3097                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3098                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3099                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3100             }
3101             else
3102             {
3103                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3104                                                   bsrr->entries[i].errcode,
3105                                                   bsrr->entries[i].errstring);
3106                 assert (drecs->num_diagRecs == 1);
3107                 e->which = Z_Entry_surrogateDiagnostic;
3108                 assert (drecs->diagRecs[0]);
3109                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3110             }
3111         }
3112     }
3113     if (diagrecs_p)
3114     {
3115         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3116         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3117     }
3118     if (log_request)
3119     {
3120         int i;
3121         WRBUF wr = wrbuf_alloc();
3122         wrbuf_printf(wr, "Scan ");
3123         for (i = 0 ; i < req->num_databaseNames; i++){
3124             if (i)
3125                 wrbuf_printf(wr, "+");
3126             wrbuf_printf(wr, req->databaseNames[i]);
3127         }
3128         wrbuf_printf(wr, " ");
3129
3130         if (bsrr->errcode){
3131             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3132             wrbuf_printf(wr, " ");
3133         }
3134         else
3135             wrbuf_printf(wr, "OK ");
3136         /* else if (*res->scanStatus == Z_Scan_success) */
3137         /*    wrbuf_printf(wr, "OK "); */
3138         /* else */
3139         /* wrbuf_printf(wr, "Partial "); */
3140
3141         if (*res->numberOfEntriesReturned)
3142             wrbuf_printf(wr, "%d - ", *res->numberOfEntriesReturned);
3143         else
3144             wrbuf_printf(wr, "0 - ");
3145
3146         wrbuf_printf(wr, "%d+%d+%d ",
3147                      (req->preferredPositionInResponse ?
3148                       *req->preferredPositionInResponse : 1),
3149                      *req->numberOfTermsRequested,
3150                      (res->stepSize ? *res->stepSize : 1));
3151
3152         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3153                           bsrr->attributeset);
3154         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3155         wrbuf_destroy(wr);
3156     }
3157     return apdu;
3158 }
3159
3160 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3161     int *fd)
3162 {
3163     int i;
3164     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3165     Z_SortResponse *res = (Z_SortResponse *)
3166         odr_malloc (assoc->encode, sizeof(*res));
3167     bend_sort_rr *bsrr = (bend_sort_rr *)
3168         odr_malloc (assoc->encode, sizeof(*bsrr));
3169
3170     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3171
3172     yaz_log(log_requestdetail, "Got SortRequest.");
3173
3174     bsrr->num_input_setnames = req->num_inputResultSetNames;
3175     for (i=0;i<req->num_inputResultSetNames;i++)
3176         yaz_log(log_requestdetail, "Input resultset: '%s'",
3177                 req->inputResultSetNames[i]);
3178     bsrr->input_setnames = req->inputResultSetNames;
3179     bsrr->referenceId = req->referenceId;
3180     bsrr->output_setname = req->sortedResultSetName;
3181     yaz_log(log_requestdetail, "Output resultset: '%s'",
3182                 req->sortedResultSetName);
3183     bsrr->sort_sequence = req->sortSequence;
3184        /*FIXME - dump those sequences too */
3185     bsrr->stream = assoc->encode;
3186     bsrr->print = assoc->print;
3187
3188     bsrr->sort_status = Z_SortResponse_failure;
3189     bsrr->errcode = 0;
3190     bsrr->errstring = 0;
3191
3192     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3193
3194     res->referenceId = bsrr->referenceId;
3195     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3196     res->resultSetStatus = 0;
3197     if (bsrr->errcode)
3198     {
3199         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3200                                        bsrr->errcode, bsrr->errstring);
3201         res->diagnostics = dr->diagRecs;
3202         res->num_diagnostics = dr->num_diagRecs;
3203     }
3204     else
3205     {
3206         res->num_diagnostics = 0;
3207         res->diagnostics = 0;
3208     }
3209     res->resultCount = 0;
3210     res->otherInfo = 0;
3211
3212     apdu->which = Z_APDU_sortResponse;
3213     apdu->u.sortResponse = res;
3214     if (log_request)
3215     {
3216         WRBUF wr = wrbuf_alloc();
3217         wrbuf_printf(wr, "Sort ");
3218         if (bsrr->errcode)
3219             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3220         else
3221             wrbuf_printf(wr,  "OK -");
3222         wrbuf_printf(wr, " (");
3223         for (i = 0; i<req->num_inputResultSetNames; i++)
3224         {
3225             if (i)
3226                 wrbuf_printf(wr, "+");
3227             wrbuf_printf(wr, req->inputResultSetNames[i]);
3228         }
3229         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3230
3231         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3232         wrbuf_destroy(wr);
3233     }
3234     return apdu;
3235 }
3236
3237 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3238     int *fd)
3239 {
3240     int i;
3241     Z_DeleteResultSetRequest *req =
3242         reqb->apdu_request->u.deleteResultSetRequest;
3243     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3244         odr_malloc (assoc->encode, sizeof(*res));
3245     bend_delete_rr *bdrr = (bend_delete_rr *)
3246         odr_malloc (assoc->encode, sizeof(*bdrr));
3247     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3248
3249     yaz_log(log_requestdetail, "Got DeleteRequest.");
3250
3251     bdrr->num_setnames = req->num_resultSetList;
3252     bdrr->setnames = req->resultSetList;
3253     for (i = 0; i<req->num_resultSetList; i++)
3254         yaz_log(log_requestdetail, "resultset: '%s'",
3255                 req->resultSetList[i]);
3256     bdrr->stream = assoc->encode;
3257     bdrr->print = assoc->print;
3258     bdrr->function = *req->deleteFunction;
3259     bdrr->referenceId = req->referenceId;
3260     bdrr->statuses = 0;
3261     if (bdrr->num_setnames > 0)
3262     {
3263         bdrr->statuses = (int*)
3264             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3265                        bdrr->num_setnames);
3266         for (i = 0; i < bdrr->num_setnames; i++)
3267             bdrr->statuses[i] = 0;
3268     }
3269     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3270
3271     res->referenceId = req->referenceId;
3272
3273     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3274
3275     res->deleteListStatuses = 0;
3276     if (bdrr->num_setnames > 0)
3277     {
3278         int i;
3279         res->deleteListStatuses = (Z_ListStatuses *)
3280             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3281         res->deleteListStatuses->num = bdrr->num_setnames;
3282         res->deleteListStatuses->elements =
3283             (Z_ListStatus **)
3284             odr_malloc (assoc->encode,
3285                         sizeof(*res->deleteListStatuses->elements) *
3286                         bdrr->num_setnames);
3287         for (i = 0; i<bdrr->num_setnames; i++)
3288         {
3289             res->deleteListStatuses->elements[i] =
3290                 (Z_ListStatus *)
3291                 odr_malloc (assoc->encode,
3292                             sizeof(**res->deleteListStatuses->elements));
3293             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3294             res->deleteListStatuses->elements[i]->id =
3295                 odr_strdup (assoc->encode, bdrr->setnames[i]);
3296         }
3297     }
3298     res->numberNotDeleted = 0;
3299     res->bulkStatuses = 0;
3300     res->deleteMessage = 0;
3301     res->otherInfo = 0;
3302
3303     apdu->which = Z_APDU_deleteResultSetResponse;
3304     apdu->u.deleteResultSetResponse = res;
3305     if (log_request)
3306     {
3307         WRBUF wr = wrbuf_alloc();
3308         wrbuf_printf(wr, "Delete ");
3309         if (bdrr->delete_status)
3310             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3311         else
3312             wrbuf_printf(wr, "OK -");
3313         for (i = 0; i<req->num_resultSetList; i++)
3314             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3315         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3316         wrbuf_destroy(wr);
3317     }
3318     return apdu;
3319 }
3320
3321 static void process_close(association *assoc, request *reqb)
3322 {
3323     Z_Close *req = reqb->apdu_request->u.close;
3324     static char *reasons[] =
3325     {
3326         "finished",
3327         "shutdown",
3328         "systemProblem",
3329         "costLimit",
3330         "resources",
3331         "securityViolation",
3332         "protocolError",
3333         "lackOfActivity",
3334         "peerAbort",
3335         "unspecified"
3336     };
3337
3338     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3339         reasons[*req->closeReason], req->diagnosticInformation ?
3340         req->diagnosticInformation : "NULL");
3341     if (assoc->version < 3) /* to make do_force respond with close */
3342         assoc->version = 3;
3343     do_close_req(assoc, Z_Close_finished,
3344                  "Association terminated by client", reqb);
3345     yaz_log(log_request,"Close OK");
3346 }
3347
3348 void save_referenceId (request *reqb, Z_ReferenceId *refid)
3349 {
3350     if (refid)
3351     {
3352         reqb->len_refid = refid->len;
3353         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
3354         memcpy (reqb->refid, refid->buf, refid->len);
3355     }
3356     else
3357     {
3358         reqb->len_refid = 0;
3359         reqb->refid = NULL;
3360     }
3361 }
3362
3363 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
3364 {
3365     process_z_response (a, req, res);
3366 }
3367
3368 bend_request bend_request_mk (bend_association a)
3369 {
3370     request *nreq = request_get (&a->outgoing);
3371     nreq->request_mem = nmem_create ();
3372     return nreq;
3373 }
3374
3375 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
3376 {
3377     Z_ReferenceId *id;
3378     if (!req->refid)
3379         return 0;
3380     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
3381     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
3382     id->len = id->size = req->len_refid;
3383     memcpy (id->buf, req->refid, req->len_refid);
3384     return id;
3385 }
3386
3387 void bend_request_destroy (bend_request *req)
3388 {
3389     nmem_destroy((*req)->request_mem);
3390     request_release(*req);
3391     *req = NULL;
3392 }
3393
3394 int bend_backend_respond (bend_association a, bend_request req)
3395 {
3396     char *msg;
3397     int r;
3398     r = process_z_request (a, req, &msg);
3399     if (r < 0)
3400         yaz_log (YLOG_WARN, "%s", msg);
3401     return r;
3402 }
3403
3404 void bend_request_setdata(bend_request r, void *p)
3405 {
3406     r->clientData = p;
3407 }
3408
3409 void *bend_request_getdata(bend_request r)
3410 {
3411     return r->clientData;
3412 }
3413
3414 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
3415 {
3416     bend_segment_rr req;
3417
3418     req.segment = reqb->apdu_request->u.segmentRequest;
3419     req.stream = assoc->encode;
3420     req.decode = assoc->decode;
3421     req.print = assoc->print;
3422     req.association = assoc;
3423
3424     (*assoc->init->bend_segment)(assoc->backend, &req);
3425
3426     return 0;
3427 }
3428
3429 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3430 {
3431     bend_esrequest_rr esrequest;
3432     const char *ext_name = "unknown";
3433
3434     Z_ExtendedServicesRequest *req =
3435         reqb->apdu_request->u.extendedServicesRequest;
3436     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3437
3438     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3439
3440     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3441     esrequest.stream = assoc->encode;
3442     esrequest.decode = assoc->decode;
3443     esrequest.print = assoc->print;
3444     esrequest.errcode = 0;
3445     esrequest.errstring = NULL;
3446     esrequest.request = reqb;
3447     esrequest.association = assoc;
3448     esrequest.taskPackage = 0;
3449     esrequest.referenceId = req->referenceId;
3450
3451
3452     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3453     {
3454         switch(esrequest.esr->taskSpecificParameters->which)
3455         {
3456         case Z_External_itemOrder:
3457             ext_name = "ItemOrder"; break;
3458         case Z_External_update:
3459             ext_name = "Update"; break;
3460         case Z_External_update0:
3461             ext_name = "Update0"; break;
3462         case Z_External_ESAdmin:
3463             ext_name = "Admin"; break;
3464
3465         }
3466     }
3467
3468     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3469
3470     /* If the response is being delayed, return NULL */
3471     if (esrequest.request == NULL)
3472         return(NULL);
3473
3474     resp->referenceId = req->referenceId;
3475
3476     if (esrequest.errcode == -1)
3477     {
3478         /* Backend service indicates request will be processed */
3479         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3480         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3481     }
3482     else if (esrequest.errcode == 0)
3483     {
3484         /* Backend service indicates request will be processed */
3485         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3486         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3487     }
3488     else
3489     {
3490         Z_DiagRecs *diagRecs =
3491             zget_DiagRecs(assoc->encode, esrequest.errcode,
3492                           esrequest.errstring);
3493         /* Backend indicates error, request will not be processed */
3494         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3495         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3496         resp->num_diagnostics = diagRecs->num_diagRecs;
3497         resp->diagnostics = diagRecs->diagRecs;
3498         if (log_request)
3499         {
3500             WRBUF wr = wrbuf_alloc();
3501             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3502             yaz_log(log_request, "EsRequest %s", wrbuf_cstr(wr) );
3503             wrbuf_destroy(wr);
3504         }
3505
3506     }
3507     /* Do something with the members of bend_extendedservice */
3508     if (esrequest.taskPackage)
3509     {
3510         resp->taskPackage = z_ext_record_oid(
3511             assoc->encode, yaz_oid_recsyn_extended,
3512             (const char *)  esrequest.taskPackage, -1
3513             );
3514     }
3515     yaz_log(YLOG_DEBUG,"Send the result apdu");
3516     return apdu;
3517 }
3518
3519 int bend_assoc_is_alive(bend_association assoc)
3520 {
3521     if (assoc->state == ASSOC_DEAD)
3522         return 0; /* already marked as dead. Don't check I/O chan anymore */
3523
3524     return iochan_is_alive(assoc->client_chan);
3525 }
3526
3527
3528 /*
3529  * Local variables:
3530  * c-basic-offset: 4
3531  * indent-tabs-mode: nil
3532  * End:
3533  * vim: shiftwidth=4 tabstop=8 expandtab
3534  */
3535