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 1.114 2007-04-12 20:47:28 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->bend_sort = NULL;
 500     assoc->init->bend_search = NULL;
 501     assoc->init->bend_present = NULL;
 502     assoc->init->bend_esrequest = NULL;
 503     assoc->init->bend_delete = NULL;
 504     assoc->init->bend_scan = NULL;
 505     assoc->init->bend_segment = NULL;
 506     assoc->init->bend_fetch = NULL;
 507     assoc->init->bend_explain = NULL;
 508     assoc->init->bend_srw_scan = NULL;
 509     assoc->init->bend_srw_update = NULL;
 510
 511     assoc->init->charneg_request = NULL;
 512     assoc->init->charneg_response = NULL;
 513
 514     assoc->init->decode = assoc->decode;
 515     assoc->init->peer_name =
 516         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
 517
 518     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 519 }
 520
 521 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 522 {
 523     statserv_options_block *cb = statserv_getcontrol();
 524     if (!assoc->init)
 525     {
 526         const char *encoding = "UTF-8";
 527         Z_External *ce;
 528         bend_initresult *binitres;
 529
 530         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 531         assoc_init_reset(assoc);
 532
 533         if (sr->username)
 534         {
 535             Z_IdAuthentication *auth = odr_malloc(assoc->decode, sizeof(*auth));
 536             int len;
 537
 538             len = strlen(sr->username) + 1;
 539             if (sr->password)
 540                 len += strlen(sr->password) + 2;
 541             auth->which = Z_IdAuthentication_open;
 542             auth->u.open = odr_malloc(assoc->decode, len);
 543             strcpy(auth->u.open, sr->username);
 544             if (sr->password && *sr->password)
 545             {
 546                 strcat(auth->u.open, "/");
 547                 strcat(auth->u.open, sr->password);
 548             }
 549             assoc->init->auth = auth;
 550         }
 551
 552 #if 1
 553         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 554         assoc->init->charneg_request = ce->u.charNeg3;
 555 #endif
 556         assoc->backend = 0;
 557         if (!(binitres = (*cb->bend_init)(assoc->init)))
 558         {
 559             assoc->state = ASSOC_DEAD;
 560             yaz_add_srw_diagnostic(assoc->encode, d, num,
 561                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 562             return 0;
 563         }
 564         assoc->backend = binitres->handle;
 565         assoc->init->auth = 0;
 566         if (binitres->errcode)
 567         {
 568             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 569             assoc->state = ASSOC_DEAD;
 570             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 571                                    binitres->errstring);
 572             return 0;
 573         }
 574         return 1;
 575     }
 576     return 1;
 577 }
 578
 579 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 580 {
 581 #if YAZ_HAVE_XML2
 582     yaz_record_conv_t rc = 0;
 583     const char *match_schema = 0;
 584     int *match_syntax = 0;
 585
 586     if (assoc->server)
 587     {
 588         int r;
 589         const char *input_schema = yaz_get_esn(rr->comp);
 590         Odr_oid *input_syntax_raw = rr->request_format;
 591
 592         const char *backend_schema = 0;
 593         Odr_oid *backend_syntax = 0;
 594
 595         r = yaz_retrieval_request(assoc->server->retrieval,
 596                                   input_schema,
 597                                   input_syntax_raw,
 598                                   &match_schema,
 599                                   &match_syntax,
 600                                   &rc,
 601                                   &backend_schema,
 602                                   &backend_syntax);
 603         if (r == -1) /* error ? */
 604         {
 605             const char *details = yaz_retrieval_get_error(
 606                 assoc->server->retrieval);
 607
 608             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 609             if (details)
 610                 rr->errstring = odr_strdup(rr->stream, details);
 611             return -1;
 612         }
 613         else if (r == 1 || r == 3)
 614         {
 615             const char *details = input_schema;
 616             rr->errcode =
 617                 YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
 618             if (details)
 619                 rr->errstring = odr_strdup(rr->stream, details);
 620             return -1;
 621         }
 622         else if (r == 2)
 623         {
 624             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 625             if (input_syntax_raw)
 626             {
 627                 char oidbuf[OID_STR_MAX];
 628                 oid_oid_to_dotstring(input_syntax_raw, oidbuf);
 629                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 630             }
 631             return -1;
 632         }
 633         if (backend_schema)
 634         {
 635             yaz_set_esn(&rr->comp, backend_schema, odr_getmem(rr->stream));
 636         }
 637         if (backend_syntax)
 638             rr->request_format = backend_syntax;
 639     }
 640     (*assoc->init->bend_fetch)(assoc->backend, rr);
 641     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
 642     {   /* post conversion must take place .. */
 643         WRBUF output_record = wrbuf_alloc();
 644         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 645         if (r)
 646         {
 647             const char *details = yaz_record_conv_get_error(rc);
 648             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 649             if (details)
 650                 rr->errstring = odr_strdup(rr->stream, details);
 651         }
 652         else
 653         {
 654             rr->len = wrbuf_len(output_record);
 655             rr->record = odr_malloc(rr->stream, rr->len);
 656             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 657         }
 658         wrbuf_destroy(output_record);
 659     }
 660     if (match_syntax)
 661         rr->output_format = match_syntax;
 662     if (match_schema)
 663         rr->schema = odr_strdup(rr->stream, match_schema);
 664     return 0;
 665 #else
 666     (*assoc->init->bend_fetch)(assoc->backend, rr);
 667 #endif
 668     return 0;
 669 }
 670
 671 static int srw_bend_fetch(association *assoc, int pos,
 672                           Z_SRW_searchRetrieveRequest *srw_req,
 673                           Z_SRW_record *record,
 674                           const char **addinfo)
 675 {
 676     bend_fetch_rr rr;
 677     ODR o = assoc->encode;
 678
 679     rr.setname = "default";
 680     rr.number = pos;
 681     rr.referenceId = 0;
 682     rr.request_format = yaz_string_to_oid_odr(yaz_oid_std(),
 683                                               CLASS_RECSYN,
 684                                               OID_STR_XML,
 685                                               assoc->decode);
 686     rr.comp = (Z_RecordComposition *)
 687             odr_malloc(assoc->decode, sizeof(*rr.comp));
 688     rr.comp->which = Z_RecordComp_complex;
 689     rr.comp->u.complex = (Z_CompSpec *)
 690             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 691     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 692         odr_malloc(assoc->encode, sizeof(bool_t));
 693     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 694     rr.comp->u.complex->num_dbSpecific = 0;
 695     rr.comp->u.complex->dbSpecific = 0;
 696     rr.comp->u.complex->num_recordSyntax = 0;
 697     rr.comp->u.complex->recordSyntax = 0;
 698
 699     rr.comp->u.complex->generic = (Z_Specification *)
 700             odr_malloc(assoc->decode, sizeof(Z_Specification));
 701
 702     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 703     rr.comp->u.complex->generic->which = Z_Schema_uri;
 704     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 705
 706     /* ESN = recordSchema if recordSchema is present */
 707     rr.comp->u.complex->generic->elementSpec = 0;
 708     if (srw_req->recordSchema)
 709     {
 710         rr.comp->u.complex->generic->elementSpec =
 711             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 712         rr.comp->u.complex->generic->elementSpec->which =
 713             Z_ElementSpec_elementSetName;
 714         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 715             srw_req->recordSchema;
 716     }
 717
 718     rr.stream = assoc->encode;
 719     rr.print = assoc->print;
 720
 721     rr.basename = 0;
 722     rr.len = 0;
 723     rr.record = 0;
 724     rr.last_in_set = 0;
 725     rr.errcode = 0;
 726     rr.errstring = 0;
 727     rr.surrogate_flag = 0;
 728     rr.schema = srw_req->recordSchema;
 729
 730     if (!assoc->init->bend_fetch)
 731         return 1;
 732
 733     retrieve_fetch(assoc, &rr);
 734
 735     if (rr.errcode && rr.surrogate_flag)
 736     {
 737         int code = yaz_diag_bib1_to_srw(rr.errcode);
 738         const char *message = yaz_diag_srw_str(code);
 739         int len = 200;
 740         if (message)
 741             len += strlen(message);
 742         if (rr.errstring)
 743             len += strlen(rr.errstring);
 744
 745         record->recordData_buf = odr_malloc(o, len);
 746
 747         sprintf(record->recordData_buf, "<diagnostic "
 748                 "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
 749                 " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
 750         if (rr.errstring)
 751             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 752                     " <details>%s</details>\n", rr.errstring);
 753         if (message)
 754             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 755                     " <message>%s</message>\n", message);
 756         sprintf(record->recordData_buf + strlen(record->recordData_buf),
 757                 "</diagnostic>\n");
 758         record->recordData_len = strlen(record->recordData_buf);
 759         record->recordPosition = odr_intdup(o, pos);
 760         record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
 761         return 0;
 762     }
 763     else if (rr.len >= 0)
 764     {
 765         record->recordData_buf = rr.record;
 766         record->recordData_len = rr.len;
 767         record->recordPosition = odr_intdup(o, pos);
 768         if (rr.schema)
 769             record->recordSchema = odr_strdup(o, rr.schema);
 770         else
 771             record->recordSchema = 0;
 772     }
 773     if (rr.errcode)
 774     {
 775         *addinfo = rr.errstring;
 776         return rr.errcode;
 777     }
 778     return 0;
 779 }
 780
 781 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 782                    Z_Query *query_result)
 783 {
 784     /* have a CQL query and  CQL to PQF transform .. */
 785     CQL_parser cp = cql_parser_create();
 786     int r;
 787     int srw_errcode = 0;
 788     const char *add = 0;
 789     char rpn_buf[5120];
 790
 791     r = cql_parser_string(cp, cql);
 792     if (r)
 793     {
 794         /* CQL syntax error */
 795         srw_errcode = 10;
 796     }
 797     if (!r)
 798     {
 799         /* Syntax OK */
 800         r = cql_transform_buf(ct,
 801                               cql_parser_result(cp),
 802                               rpn_buf, sizeof(rpn_buf)-1);
 803         if (r)
 804             srw_errcode  = cql_transform_error(ct, &add);
 805     }
 806     if (!r)
 807     {
 808         /* Syntax & transform OK. */
 809         /* Convert PQF string to Z39.50 to RPN query struct */
 810         YAZ_PQF_Parser pp = yaz_pqf_create();
 811         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 812         if (!rpnquery)
 813         {
 814             size_t off;
 815             const char *pqf_msg;
 816             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 817             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 818                     pqf_msg, code);
 819             srw_errcode = 10;
 820         }
 821         else
 822         {
 823             query_result->which = Z_Query_type_1;
 824             query_result->u.type_1 = rpnquery;
 825         }
 826         yaz_pqf_destroy(pp);
 827     }
 828     cql_parser_destroy(cp);
 829     return srw_errcode;
 830 }
 831
 832 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 833                         Z_AttributesPlusTerm *result)
 834 {
 835     Z_Query query;
 836     Z_RPNQuery *rpn;
 837     int srw_error = cql2pqf(odr, cql, ct, &query);
 838     if (srw_error)
 839         return srw_error;
 840     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 841         return 10; /* bad query type */
 842     rpn = query.u.type_1;
 843     if (!rpn->RPNStructure)
 844         return 10; /* must be structure */
 845     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 846         return 10; /* must be simple */
 847     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 848         return 10; /* must be attributes plus term node .. */
 849     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 850            sizeof(*result));
 851     return 0;
 852 }
 853
 854 static void srw_bend_search(association *assoc, request *req,
 855                             Z_SRW_PDU *sr,
 856                             Z_SRW_searchRetrieveResponse *srw_res,
 857                             int *http_code)
 858 {
 859     int srw_error = 0;
 860     Z_External *ext;
 861     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 862
 863     *http_code = 200;
 864     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 865     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 866     if (srw_res->num_diagnostics == 0 && assoc->init)
 867     {
 868         bend_search_rr rr;
 869         rr.setname = "default";
 870         rr.replace_set = 1;
 871         rr.num_bases = 1;
 872         rr.basenames = &srw_req->database;
 873         rr.referenceId = 0;
 874         rr.srw_sortKeys = 0;
 875         rr.srw_setname = 0;
 876         rr.srw_setnameIdleTime = 0;
 877         rr.estimated_hit_count = 0;
 878         rr.partial_resultset = 0;
 879         rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 880         rr.query->u.type_1 = 0;
 881
 882         if (srw_req->query_type == Z_SRW_query_type_cql)
 883         {
 884             if (assoc->server && assoc->server->cql_transform)
 885             {
 886                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 887                                           assoc->server->cql_transform,
 888                                           rr.query);
 889                 if (srw_errcode)
 890                 {
 891                     yaz_add_srw_diagnostic(assoc->encode,
 892                                            &srw_res->diagnostics,
 893                                            &srw_res->num_diagnostics,
 894                                            srw_errcode, 0);
 895                 }
 896             }
 897             else
 898             {
 899                 /* CQL query to backend. Wrap it - Z39.50 style */
 900                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 901                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 902                                                         "1.2.840.10003.16.2");
 903                 ext->indirect_reference = 0;
 904                 ext->descriptor = 0;
 905                 ext->which = Z_External_CQL;
 906                 ext->u.cql = srw_req->query.cql;
 907
 908                 rr.query->which = Z_Query_type_104;
 909                 rr.query->u.type_104 =  ext;
 910             }
 911         }
 912         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 913         {
 914             Z_RPNQuery *RPNquery;
 915             YAZ_PQF_Parser pqf_parser;
 916
 917             pqf_parser = yaz_pqf_create ();
 918
 919             RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
 920                                       srw_req->query.pqf);
 921             if (!RPNquery)
 922             {
 923                 const char *pqf_msg;
 924                 size_t off;
 925                 int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
 926                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 927                         code, pqf_msg, (long) off);
 928                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 929             }
 930
 931             rr.query->which = Z_Query_type_1;
 932             rr.query->u.type_1 =  RPNquery;
 933
 934             yaz_pqf_destroy (pqf_parser);
 935         }
 936         else
 937         {
 938             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 939                                    &srw_res->num_diagnostics,
 940                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 941         }
 942         if (rr.query->u.type_1)
 943         {
 944             rr.stream = assoc->encode;
 945             rr.decode = assoc->decode;
 946             rr.print = assoc->print;
 947             rr.request = req;
 948             if ( srw_req->sort.sortKeys )
 949                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 950                                              srw_req->sort.sortKeys );
 951             rr.association = assoc;
 952             rr.fd = 0;
 953             rr.hits = 0;
 954             rr.errcode = 0;
 955             rr.errstring = 0;
 956             rr.search_info = 0;
 957             yaz_log_zquery_level(log_requestdetail,rr.query);
 958
 959             (assoc->init->bend_search)(assoc->backend, &rr);
 960             if (rr.errcode)
 961             {
 962                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 963                 {
 964                     *http_code = 404;
 965                 }
 966                 else
 967                 {
 968                     srw_error = yaz_diag_bib1_to_srw (rr.errcode);
 969                     yaz_add_srw_diagnostic(assoc->encode,
 970                                            &srw_res->diagnostics,
 971                                            &srw_res->num_diagnostics,
 972                                            srw_error, rr.errstring);
 973                 }
 974             }
 975             else
 976             {
 977                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
 978                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
 979
 980                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
 981                         start, number, rr.hits);
 982
 983                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 984                 if (rr.srw_setname)
 985                 {
 986                     srw_res->resultSetId =
 987                         odr_strdup(assoc->encode, rr.srw_setname );
 988                     srw_res->resultSetIdleTime =
 989                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
 990                 }
 991
 992                 if ((rr.hits > 0 && start > rr.hits) || start < 1)
 993                 {
 994                     yaz_add_srw_diagnostic(
 995                         assoc->encode,
 996                         &srw_res->diagnostics, &srw_res->num_diagnostics,
 997                         YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
 998                 }
 999                 else if (number > 0)
1000                 {
1001                     int i;
1002                     int ok = 1;
1003                     if (start + number > rr.hits)
1004                         number = rr.hits - start + 1;
1005
1006                     /* Call bend_present if defined */
1007                     if (assoc->init->bend_present)
1008                     {
1009                         bend_present_rr *bprr = (bend_present_rr*)
1010                             odr_malloc (assoc->decode, sizeof(*bprr));
1011                         bprr->setname = "default";
1012                         bprr->start = start;
1013                         bprr->number = number;
1014                         if (srw_req->recordSchema)
1015                         {
1016                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1017                                                                             sizeof(*bprr->comp));
1018                             bprr->comp->which = Z_RecordComp_simple;
1019                             bprr->comp->u.simple = (Z_ElementSetNames *)
1020                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1021                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1022                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1023                         }
1024                         else
1025                         {
1026                             bprr->comp = 0;
1027                         }
1028                         bprr->stream = assoc->encode;
1029                         bprr->referenceId = 0;
1030                         bprr->print = assoc->print;
1031                         bprr->request = req;
1032                         bprr->association = assoc;
1033                         bprr->errcode = 0;
1034                         bprr->errstring = NULL;
1035                         (*assoc->init->bend_present)(assoc->backend, bprr);
1036
1037                         if (!bprr->request)
1038                             return;
1039                         if (bprr->errcode)
1040                         {
1041                             srw_error = yaz_diag_bib1_to_srw (bprr->errcode);
1042                             yaz_add_srw_diagnostic(assoc->encode,
1043                                                    &srw_res->diagnostics,
1044                                                    &srw_res->num_diagnostics,
1045                                                    srw_error, bprr->errstring);
1046                             ok = 0;
1047                         }
1048                     }
1049
1050                     if (ok)
1051                     {
1052                         int j = 0;
1053                         int packing = Z_SRW_recordPacking_string;
1054                         if (srw_req->recordPacking)
1055                         {
1056                             packing =
1057                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1058                             if (packing == -1)
1059                                 packing = Z_SRW_recordPacking_string;
1060                         }
1061                         srw_res->records = (Z_SRW_record *)
1062                             odr_malloc(assoc->encode,
1063                                        number * sizeof(*srw_res->records));
1064
1065                         srw_res->extra_records = (Z_SRW_extra_record **)
1066                             odr_malloc(assoc->encode,
1067                                        number*sizeof(*srw_res->extra_records));
1068
1069                         for (i = 0; i<number; i++)
1070                         {
1071                             int errcode;
1072                             const char *addinfo = 0;
1073
1074                             srw_res->records[j].recordPacking = packing;
1075                             srw_res->records[j].recordData_buf = 0;
1076                             srw_res->extra_records[j] = 0;
1077                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1078                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1079                                                      srw_res->records + j,
1080                                                      &addinfo);
1081                             if (errcode)
1082                             {
1083                                 yaz_add_srw_diagnostic(assoc->encode,
1084                                                        &srw_res->diagnostics,
1085                                                        &srw_res->num_diagnostics,
1086                                                        yaz_diag_bib1_to_srw (errcode),
1087                                                        addinfo);
1088
1089                                 break;
1090                             }
1091                             if (srw_res->records[j].recordData_buf)
1092                                 j++;
1093                         }
1094                         srw_res->num_records = j;
1095                         if (!j)
1096                             srw_res->records = 0;
1097                     }
1098                 }
1099                 if (rr.estimated_hit_count || rr.partial_resultset)
1100                 {
1101                     yaz_add_srw_diagnostic(
1102                         assoc->encode,
1103                         &srw_res->diagnostics,
1104                         &srw_res->num_diagnostics,
1105                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1106                         0);
1107                 }
1108             }
1109         }
1110     }
1111     if (log_request)
1112     {
1113         const char *querystr = "?";
1114         const char *querytype = "?";
1115         WRBUF wr = wrbuf_alloc();
1116
1117         switch (srw_req->query_type)
1118         {
1119         case Z_SRW_query_type_cql:
1120             querytype = "CQL";
1121             querystr = srw_req->query.cql;
1122             break;
1123         case Z_SRW_query_type_pqf:
1124             querytype = "PQF";
1125             querystr = srw_req->query.pqf;
1126             break;
1127         }
1128         wrbuf_printf(wr, "SRWSearch ");
1129         wrbuf_printf(wr, srw_req->database);
1130         wrbuf_printf(wr, " ");
1131         if (srw_res->num_diagnostics)
1132             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1133         else if (*http_code != 200)
1134             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1135         else if (srw_res->numberOfRecords)
1136         {
1137             wrbuf_printf(wr, "OK %d",
1138                          (srw_res->numberOfRecords ?
1139                           *srw_res->numberOfRecords : 0));
1140         }
1141         wrbuf_printf(wr, " %s %d+%d",
1142                      (srw_res->resultSetId ?
1143                       srw_res->resultSetId : "-"),
1144                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1145                      srw_res->num_records);
1146         yaz_log(log_request, "%s %s: %s", wrbuf_cstr(wr), querytype, querystr);
1147         wrbuf_destroy(wr);
1148     }
1149 }
1150
1151 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1152 {
1153 #if YAZ_HAVE_XML2
1154     xmlNodePtr ptr = rr->server_node_ptr;
1155     if (!ptr)
1156         return 0;
1157     for (ptr = ptr->children; ptr; ptr = ptr->next)
1158     {
1159         if (ptr->type != XML_ELEMENT_NODE)
1160             continue;
1161         if (!strcmp((const char *) ptr->name, "explain"))
1162         {
1163             int len;
1164             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1165             xmlChar *buf_out;
1166             char *content;
1167
1168             ptr = xmlCopyNode(ptr, 1);
1169
1170             xmlDocSetRootElement(doc, ptr);
1171
1172             xmlDocDumpMemory(doc, &buf_out, &len);
1173             content = (char*) odr_malloc(rr->stream, 1+len);
1174             memcpy(content, buf_out, len);
1175             content[len] = '\0';
1176
1177             xmlFree(buf_out);
1178             xmlFreeDoc(doc);
1179             rr->explain_buf = content;
1180             return 0;
1181         }
1182     }
1183 #endif
1184     return 0;
1185 }
1186
1187 static void srw_bend_explain(association *assoc, request *req,
1188                              Z_SRW_PDU *sr,
1189                              Z_SRW_explainResponse *srw_res,
1190                              int *http_code)
1191 {
1192     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1193     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1194     *http_code = 404;
1195     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1196     if (assoc->init)
1197     {
1198         bend_explain_rr rr;
1199
1200         rr.stream = assoc->encode;
1201         rr.decode = assoc->decode;
1202         rr.print = assoc->print;
1203         rr.explain_buf = 0;
1204         rr.database = srw_req->database;
1205         if (assoc->server)
1206             rr.server_node_ptr = assoc->server->server_node_ptr;
1207         else
1208             rr.server_node_ptr = 0;
1209         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1210         if (assoc->init->bend_explain)
1211             (*assoc->init->bend_explain)(assoc->backend, &rr);
1212         else
1213             srw_bend_explain_default(assoc->backend, &rr);
1214
1215         if (rr.explain_buf)
1216         {
1217             int packing = Z_SRW_recordPacking_string;
1218             if (srw_req->recordPacking)
1219             {
1220                 packing =
1221                     yaz_srw_str_to_pack(srw_req->recordPacking);
1222                 if (packing == -1)
1223                     packing = Z_SRW_recordPacking_string;
1224             }
1225             srw_res->record.recordSchema = rr.schema;
1226             srw_res->record.recordPacking = packing;
1227             srw_res->record.recordData_buf = rr.explain_buf;
1228             srw_res->record.recordData_len = strlen(rr.explain_buf);
1229             srw_res->record.recordPosition = 0;
1230             *http_code = 200;
1231         }
1232     }
1233 }
1234
1235 static void srw_bend_scan(association *assoc, request *req,
1236                           Z_SRW_PDU *sr,
1237                           Z_SRW_scanResponse *srw_res,
1238                           int *http_code)
1239 {
1240     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1241     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1242
1243     *http_code = 200;
1244     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1245     if (srw_res->num_diagnostics == 0 && assoc->init)
1246     {
1247         struct scan_entry *save_entries;
1248
1249         bend_scan_rr *bsrr = (bend_scan_rr *)
1250             odr_malloc (assoc->encode, sizeof(*bsrr));
1251         bsrr->num_bases = 1;
1252         bsrr->basenames = &srw_req->database;
1253
1254         bsrr->num_entries = srw_req->maximumTerms ?
1255             *srw_req->maximumTerms : 10;
1256         bsrr->term_position = srw_req->responsePosition ?
1257             *srw_req->responsePosition : 1;
1258
1259         bsrr->errcode = 0;
1260         bsrr->errstring = 0;
1261         bsrr->referenceId = 0;
1262         bsrr->stream = assoc->encode;
1263         bsrr->print = assoc->print;
1264         bsrr->step_size = odr_intdup(assoc->decode, 0);
1265         bsrr->entries = 0;
1266
1267         if (bsrr->num_entries > 0)
1268         {
1269             int i;
1270             bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1271                                        bsrr->num_entries);
1272             for (i = 0; i<bsrr->num_entries; i++)
1273             {
1274                 bsrr->entries[i].term = 0;
1275                 bsrr->entries[i].occurrences = 0;
1276                 bsrr->entries[i].errcode = 0;
1277                 bsrr->entries[i].errstring = 0;
1278                 bsrr->entries[i].display_term = 0;
1279             }
1280         }
1281         save_entries = bsrr->entries;  /* save it so we can compare later */
1282
1283         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1284             assoc->init->bend_scan)
1285         {
1286             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1287
1288             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1289                                       &bsrr->attributeset,
1290                                       srw_req->scanClause.pqf);
1291             yaz_pqf_destroy(pqf_parser);
1292             bsrr->scanClause = 0;
1293             ((int (*)(void *, bend_scan_rr *))
1294              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1295         }
1296         else if (srw_req->query_type == Z_SRW_query_type_cql
1297                  && assoc->init->bend_scan && assoc->server
1298                  && assoc->server->cql_transform)
1299         {
1300             int srw_error;
1301             bsrr->scanClause = 0;
1302             bsrr->attributeset = 0;
1303             bsrr->term = odr_malloc(assoc->decode, sizeof(*bsrr->term));
1304             srw_error = cql2pqf_scan(assoc->encode,
1305                                      srw_req->scanClause.cql,
1306                                      assoc->server->cql_transform,
1307                                      bsrr->term);
1308             if (srw_error)
1309                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1310                                        &srw_res->num_diagnostics,
1311                                        srw_error, 0);
1312             else
1313             {
1314                 ((int (*)(void *, bend_scan_rr *))
1315                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1316             }
1317         }
1318         else if (srw_req->query_type == Z_SRW_query_type_cql
1319                  && assoc->init->bend_srw_scan)
1320         {
1321             bsrr->term = 0;
1322             bsrr->attributeset = 0;
1323             bsrr->scanClause = srw_req->scanClause.cql;
1324             ((int (*)(void *, bend_scan_rr *))
1325              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1326         }
1327         else
1328         {
1329             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1330                                    &srw_res->num_diagnostics,
1331                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1332         }
1333         if (bsrr->errcode)
1334         {
1335             int srw_error;
1336             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1337             {
1338                 *http_code = 404;
1339                 return;
1340             }
1341             srw_error = yaz_diag_bib1_to_srw (bsrr->errcode);
1342
1343             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1344                                    &srw_res->num_diagnostics,
1345                                    srw_error, bsrr->errstring);
1346         }
1347         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1348         {
1349             int i;
1350             srw_res->terms = (Z_SRW_scanTerm*)
1351                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1352                            bsrr->num_entries);
1353
1354             srw_res->num_terms =  bsrr->num_entries;
1355             for (i = 0; i<bsrr->num_entries; i++)
1356             {
1357                 Z_SRW_scanTerm *t = srw_res->terms + i;
1358                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1359                 t->numberOfRecords =
1360                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1361                 t->displayTerm = 0;
1362                 if (save_entries == bsrr->entries &&
1363                     bsrr->entries[i].display_term)
1364                 {
1365                     /* the entries was _not_ set by the handler. So it's
1366                        safe to test for new member display_term. It is
1367                        NULL'ed by us.
1368                     */
1369                     t->displayTerm = odr_strdup(assoc->encode,
1370                                                 bsrr->entries[i].display_term);
1371                 }
1372                 t->whereInList = 0;
1373             }
1374         }
1375     }
1376     if (log_request)
1377     {
1378         WRBUF wr = wrbuf_alloc();
1379         const char *querytype = 0;
1380         const char *querystr = 0;
1381
1382         switch(srw_req->query_type)
1383         {
1384         case Z_SRW_query_type_pqf:
1385             querytype = "PQF";
1386             querystr = srw_req->scanClause.pqf;
1387             break;
1388         case Z_SRW_query_type_cql:
1389             querytype = "CQL";
1390             querystr = srw_req->scanClause.cql;
1391             break;
1392         default:
1393             querytype = "UNKNOWN";
1394             querystr = "";
1395         }
1396
1397         wrbuf_printf(wr, "SRWScan ");
1398         wrbuf_printf(wr, srw_req->database);
1399         wrbuf_printf(wr, " ");
1400
1401         if (srw_res->num_diagnostics)
1402             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1403         else if (srw_res->num_terms)
1404             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1405         else
1406             wrbuf_printf(wr, "OK - - ");
1407
1408         wrbuf_printf(wr, "%d+%d+0 ",
1409                      (srw_req->responsePosition ?
1410                       *srw_req->responsePosition : 1),
1411                      (srw_req->maximumTerms ?
1412                       *srw_req->maximumTerms : 1));
1413         /* there is no step size in SRU/W ??? */
1414         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1415         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1416         wrbuf_destroy(wr);
1417     }
1418
1419 }
1420
1421 static void srw_bend_update(association *assoc, request *req,
1422                             Z_SRW_PDU *sr,
1423                             Z_SRW_updateResponse *srw_res,
1424                             int *http_code)
1425 {
1426     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1427     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1428     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1429     *http_code = 404;
1430     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1431     if (assoc->init)
1432     {
1433         bend_update_rr rr;
1434         Z_SRW_extra_record *extra = srw_req->extra_record;
1435
1436         rr.stream = assoc->encode;
1437         rr.print = assoc->print;
1438         rr.num_bases = 1;
1439         rr.basenames = &srw_req->database;
1440         rr.operation = srw_req->operation;
1441         rr.operation_status = "failed";
1442         rr.record_id = 0;
1443         rr.record_versions = 0;
1444         rr.num_versions = 0;
1445         rr.record_packing = "string";
1446         rr.record_schema = 0;
1447         rr.record_data = 0;
1448         rr.extra_record_data = 0;
1449         rr.extra_request_data = 0;
1450         rr.extra_response_data = 0;
1451         rr.uri = 0;
1452         rr.message = 0;
1453         rr.details = 0;
1454
1455         *http_code = 200;
1456         if (rr.operation == 0)
1457         {
1458             yaz_add_sru_update_diagnostic(
1459                 assoc->encode, &srw_res->diagnostics,
1460                 &srw_res->num_diagnostics,
1461                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1462                 "action" );
1463             return;
1464         }
1465         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1466         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1467         if (!strcmp( rr.operation, "delete"))
1468         {
1469             if (srw_req->record && !srw_req->record->recordSchema)
1470             {
1471                 rr.record_schema = odr_strdup(
1472                     assoc->encode,
1473                     srw_req->record->recordSchema);
1474             }
1475             if (srw_req->record)
1476             {
1477                 rr.record_data = odr_strdupn(
1478                     assoc->encode,
1479                     srw_req->record->recordData_buf,
1480                     srw_req->record->recordData_len );
1481             }
1482             if (extra && extra->extraRecordData_len)
1483             {
1484                 rr.extra_record_data = odr_strdupn(
1485                     assoc->encode,
1486                     extra->extraRecordData_buf,
1487                     extra->extraRecordData_len );
1488             }
1489             if (srw_req->recordId)
1490                 rr.record_id = srw_req->recordId;
1491             else if (extra && extra->recordIdentifier)
1492                 rr.record_id = extra->recordIdentifier;
1493         }
1494         else if (!strcmp(rr.operation, "replace"))
1495         {
1496             if (srw_req->recordId)
1497                 rr.record_id = srw_req->recordId;
1498             else if (extra && extra->recordIdentifier)
1499                 rr.record_id = extra->recordIdentifier;
1500             else
1501             {
1502                 yaz_add_sru_update_diagnostic(
1503                     assoc->encode, &srw_res->diagnostics,
1504                     &srw_res->num_diagnostics,
1505                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1506                     "recordIdentifier");
1507             }
1508             if (!srw_req->record)
1509             {
1510                 yaz_add_sru_update_diagnostic(
1511                     assoc->encode, &srw_res->diagnostics,
1512                     &srw_res->num_diagnostics,
1513                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1514                     "record");
1515             }
1516             else
1517             {
1518                 if (srw_req->record->recordSchema)
1519                     rr.record_schema = odr_strdup(
1520                         assoc->encode, srw_req->record->recordSchema);
1521                 if (srw_req->record->recordData_len )
1522                 {
1523                     rr.record_data = odr_strdupn(assoc->encode,
1524                                                  srw_req->record->recordData_buf,
1525                                                  srw_req->record->recordData_len );
1526                 }
1527                 else
1528                 {
1529                     yaz_add_sru_update_diagnostic(
1530                         assoc->encode, &srw_res->diagnostics,
1531                         &srw_res->num_diagnostics,
1532                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1533                         "recordData" );
1534                 }
1535             }
1536             if (extra && extra->extraRecordData_len)
1537             {
1538                 rr.extra_record_data = odr_strdupn(
1539                     assoc->encode,
1540                     extra->extraRecordData_buf,
1541                     extra->extraRecordData_len );
1542             }
1543         }
1544         else if (!strcmp(rr.operation, "insert"))
1545         {
1546             if (srw_req->recordId)
1547                 rr.record_id = srw_req->recordId;
1548             else if (extra)
1549                 rr.record_id = extra->recordIdentifier;
1550
1551             if (srw_req->record)
1552             {
1553                 if (srw_req->record->recordSchema)
1554                     rr.record_schema = odr_strdup(
1555                         assoc->encode, srw_req->record->recordSchema);
1556
1557                 if (srw_req->record->recordData_len)
1558                     rr.record_data = odr_strdupn(
1559                         assoc->encode,
1560                         srw_req->record->recordData_buf,
1561                         srw_req->record->recordData_len );
1562             }
1563             if (extra && extra->extraRecordData_len)
1564             {
1565                 rr.extra_record_data = odr_strdupn(
1566                     assoc->encode,
1567                     extra->extraRecordData_buf,
1568                     extra->extraRecordData_len );
1569             }
1570         }
1571         else
1572             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1573                                           &srw_res->num_diagnostics,
1574                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1575                                           rr.operation );
1576
1577         if (srw_req->record)
1578         {
1579             const char *pack_str =
1580                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1581             if (pack_str)
1582                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1583         }
1584
1585         if (srw_req->num_recordVersions)
1586         {
1587             rr.record_versions = srw_req->recordVersions;
1588             rr.num_versions = srw_req->num_recordVersions;
1589         }
1590         if (srw_req->extraRequestData_len)
1591         {
1592             rr.extra_request_data = odr_strdupn(assoc->encode,
1593                                                 srw_req->extraRequestData_buf,
1594                                                 srw_req->extraRequestData_len );
1595         }
1596         if (srw_res->num_diagnostics == 0)
1597         {
1598             if ( assoc->init->bend_srw_update)
1599                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1600             else
1601                 yaz_add_sru_update_diagnostic(
1602                     assoc->encode, &srw_res->diagnostics,
1603                     &srw_res->num_diagnostics,
1604                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1605                     "No Update backend handler");
1606         }
1607
1608         if (rr.uri)
1609             yaz_add_srw_diagnostic_uri(assoc->encode,
1610                                        &srw_res->diagnostics,
1611                                        &srw_res->num_diagnostics,
1612                                        rr.uri,
1613                                        rr.message,
1614                                        rr.details);
1615         srw_res->recordId = rr.record_id;
1616         srw_res->operationStatus = rr.operation_status;
1617         srw_res->recordVersions = rr.record_versions;
1618         srw_res->num_recordVersions = rr.num_versions;
1619         if (srw_res->extraResponseData_len)
1620         {
1621             srw_res->extraResponseData_buf = rr.extra_response_data;
1622             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1623         }
1624         if (srw_res->num_diagnostics == 0 && rr.record_data)
1625         {
1626             srw_res->record = yaz_srw_get_record(assoc->encode);
1627             srw_res->record->recordSchema = rr.record_schema;
1628             if (rr.record_packing)
1629             {
1630                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1631
1632                 if (pack == -1)
1633                 {
1634                     pack = Z_SRW_recordPacking_string;
1635                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1636                             rr.record_packing);
1637                 }
1638                 srw_res->record->recordPacking = pack;
1639             }
1640             srw_res->record->recordData_buf = rr.record_data;
1641             srw_res->record->recordData_len = strlen(rr.record_data);
1642             if (rr.extra_record_data)
1643             {
1644                 Z_SRW_extra_record *ex =
1645                     yaz_srw_get_extra_record(assoc->encode);
1646                 srw_res->extra_record = ex;
1647                 ex->extraRecordData_buf = rr.extra_record_data;
1648                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1649             }
1650         }
1651     }
1652 }
1653
1654 /* check if path is OK (1); BAD (0) */
1655 static int check_path(const char *path)
1656 {
1657     if (*path != '/')
1658         return 0;
1659     if (strstr(path, ".."))
1660         return 0;
1661     return 1;
1662 }
1663
1664 static char *read_file(const char *fname, ODR o, int *sz)
1665 {
1666     char *buf;
1667     FILE *inf = fopen(fname, "rb");
1668     if (!inf)
1669         return 0;
1670
1671     fseek(inf, 0L, SEEK_END);
1672     *sz = ftell(inf);
1673     rewind(inf);
1674     buf = odr_malloc(o, *sz);
1675     fread(buf, 1, *sz, inf);
1676     fclose(inf);
1677     return buf;
1678 }
1679
1680 static void process_http_request(association *assoc, request *req)
1681 {
1682     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1683     ODR o = assoc->encode;
1684     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1685     Z_SRW_PDU *sr = 0;
1686     Z_SOAP *soap_package = 0;
1687     Z_GDU *p = 0;
1688     char *charset = 0;
1689     Z_HTTP_Response *hres = 0;
1690     int keepalive = 1;
1691     const char *stylesheet = 0; /* for now .. set later */
1692     Z_SRW_diagnostic *diagnostic = 0;
1693     int num_diagnostic = 0;
1694     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1695
1696     if (!control_association(assoc, host, 0))
1697     {
1698         p = z_get_HTTP_Response(o, 404);
1699         r = 1;
1700     }
1701     if (r == 2 && assoc->server && assoc->server->docpath
1702         && hreq->path[0] == '/'
1703         &&
1704         /* check if path is a proper prefix of documentroot */
1705         strncmp(hreq->path+1, assoc->server->docpath,
1706                 strlen(assoc->server->docpath))
1707         == 0)
1708     {
1709         if (!check_path(hreq->path))
1710         {
1711             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1712             p = z_get_HTTP_Response(o, 404);
1713         }
1714         else
1715         {
1716             int content_size = 0;
1717             char *content_buf = read_file(hreq->path+1, o, &content_size);
1718             if (!content_buf)
1719             {
1720                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1721                 p = z_get_HTTP_Response(o, 404);
1722             }
1723             else
1724             {
1725                 const char *ctype = 0;
1726                 yaz_mime_types types = yaz_mime_types_create();
1727
1728                 yaz_mime_types_add(types, "xsl", "application/xml");
1729                 yaz_mime_types_add(types, "xml", "application/xml");
1730                 yaz_mime_types_add(types, "css", "text/css");
1731                 yaz_mime_types_add(types, "html", "text/html");
1732                 yaz_mime_types_add(types, "htm", "text/html");
1733                 yaz_mime_types_add(types, "txt", "text/plain");
1734                 yaz_mime_types_add(types, "js", "application/x-javascript");
1735
1736                 yaz_mime_types_add(types, "gif", "image/gif");
1737                 yaz_mime_types_add(types, "png", "image/png");
1738                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1739                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1740
1741                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1742                 if (!ctype)
1743                 {
1744                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1745                     p = z_get_HTTP_Response(o, 404);
1746                 }
1747                 else
1748                 {
1749                     p = z_get_HTTP_Response(o, 200);
1750                     hres = p->u.HTTP_Response;
1751                     hres->content_buf = content_buf;
1752                     hres->content_len = content_size;
1753                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1754                 }
1755                 yaz_mime_types_destroy(types);
1756             }
1757         }
1758         r = 1;
1759     }
1760
1761     if (r == 2)
1762     {
1763         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1764         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1765     }
1766     if (r == 2)  /* not taken */
1767     {
1768         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1769                            &diagnostic, &num_diagnostic);
1770         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1771     }
1772     if (r == 0)  /* decode SRW/SRU OK .. */
1773     {
1774         int http_code = 200;
1775         if (sr->which == Z_SRW_searchRetrieve_request)
1776         {
1777             Z_SRW_PDU *res =
1778                 yaz_srw_get(assoc->encode, Z_SRW_searchRetrieve_response);
1779
1780             stylesheet = sr->u.request->stylesheet;
1781             if (num_diagnostic)
1782             {
1783                 res->u.response->diagnostics = diagnostic;
1784                 res->u.response->num_diagnostics = num_diagnostic;
1785             }
1786             else
1787             {
1788                 srw_bend_search(assoc, req, sr, res->u.response,
1789                                 &http_code);
1790             }
1791             if (http_code == 200)
1792                 soap_package->u.generic->p = res;
1793         }
1794         else if (sr->which == Z_SRW_explain_request)
1795         {
1796             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
1797             stylesheet = sr->u.explain_request->stylesheet;
1798             if (num_diagnostic)
1799             {
1800                 res->u.explain_response->diagnostics = diagnostic;
1801                 res->u.explain_response->num_diagnostics = num_diagnostic;
1802             }
1803             srw_bend_explain(assoc, req, sr,
1804                              res->u.explain_response, &http_code);
1805             if (http_code == 200)
1806                 soap_package->u.generic->p = res;
1807         }
1808         else if (sr->which == Z_SRW_scan_request)
1809         {
1810             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_scan_response);
1811             stylesheet = sr->u.scan_request->stylesheet;
1812             if (num_diagnostic)
1813             {
1814                 res->u.scan_response->diagnostics = diagnostic;
1815                 res->u.scan_response->num_diagnostics = num_diagnostic;
1816             }
1817             srw_bend_scan(assoc, req, sr,
1818                           res->u.scan_response, &http_code);
1819             if (http_code == 200)
1820                 soap_package->u.generic->p = res;
1821         }
1822         else if (sr->which == Z_SRW_update_request)
1823         {
1824             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_update_response);
1825             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1826             if (num_diagnostic)
1827             {
1828                 res->u.update_response->diagnostics = diagnostic;
1829                 res->u.update_response->num_diagnostics = num_diagnostic;
1830             }
1831             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1832             srw_bend_update(assoc, req, sr,
1833                             res->u.update_response, &http_code);
1834             if (http_code == 200)
1835                 soap_package->u.generic->p = res;
1836         }
1837         else
1838         {
1839             yaz_log(log_request, "SOAP ERROR");
1840             /* FIXME - what error, what query */
1841             http_code = 500;
1842             z_soap_error(assoc->encode, soap_package,
1843                          "SOAP-ENV:Client", "Bad method", 0);
1844         }
1845         if (http_code == 200 || http_code == 500)
1846         {
1847             static Z_SOAP_Handler soap_handlers[4] = {
1848 #if YAZ_HAVE_XML2
1849                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1850                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1851                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1852 #endif
1853                 {0, 0, 0}
1854             };
1855             char ctype[60];
1856             int ret;
1857             p = z_get_HTTP_Response(o, 200);
1858             hres = p->u.HTTP_Response;
1859
1860             if (!stylesheet && assoc->server)
1861                 stylesheet = assoc->server->stylesheet;
1862
1863             /* empty stylesheet means NO stylesheet */
1864             if (stylesheet && *stylesheet == '\0')
1865                 stylesheet = 0;
1866
1867             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1868                                        &hres->content_buf, &hres->content_len,
1869                                        soap_handlers, charset, stylesheet);
1870             hres->code = http_code;
1871
1872             strcpy(ctype, "text/xml");
1873             if (charset)
1874             {
1875                 strcat(ctype, "; charset=");
1876                 strcat(ctype, charset);
1877             }
1878             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1879         }
1880         else
1881             p = z_get_HTTP_Response(o, http_code);
1882     }
1883
1884     if (p == 0)
1885         p = z_get_HTTP_Response(o, 500);
1886     hres = p->u.HTTP_Response;
1887     if (!strcmp(hreq->version, "1.0"))
1888     {
1889         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1890         if (v && !strcmp(v, "Keep-Alive"))
1891             keepalive = 1;
1892         else
1893             keepalive = 0;
1894         hres->version = "1.0";
1895     }
1896     else
1897     {
1898         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1899         if (v && !strcmp(v, "close"))
1900             keepalive = 0;
1901         else
1902             keepalive = 1;
1903         hres->version = "1.1";
1904     }
1905     if (!keepalive)
1906     {
1907         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1908         assoc->state = ASSOC_DEAD;
1909         assoc->cs_get_mask = 0;
1910     }
1911     else
1912     {
1913         int t;
1914         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1915
1916         if (alive && isdigit(*(const unsigned char *) alive))
1917             t = atoi(alive);
1918         else
1919             t = 15;
1920         if (t < 0 || t > 3600)
1921             t = 3600;
1922         iochan_settimeout(assoc->client_chan,t);
1923         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1924     }
1925     process_gdu_response(assoc, req, p);
1926 }
1927
1928 static void process_gdu_request(association *assoc, request *req)
1929 {
1930     if (req->gdu_request->which == Z_GDU_Z3950)
1931     {
1932         char *msg = 0;
1933         req->apdu_request = req->gdu_request->u.z3950;
1934         if (process_z_request(assoc, req, &msg) < 0)
1935             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1936     }
1937     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1938         process_http_request(assoc, req);
1939     else
1940     {
1941         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1942     }
1943 }
1944
1945 /*
1946  * Initiate request processing.
1947  */
1948 static int process_z_request(association *assoc, request *req, char **msg)
1949 {
1950     int fd = -1;
1951     Z_APDU *res;
1952     int retval;
1953
1954     *msg = "Unknown Error";
1955     assert(req && req->state == REQUEST_IDLE);
1956     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1957     {
1958         *msg = "Missing InitRequest";
1959         return -1;
1960     }
1961     switch (req->apdu_request->which)
1962     {
1963     case Z_APDU_initRequest:
1964         res = process_initRequest(assoc, req); break;
1965     case Z_APDU_searchRequest:
1966         res = process_searchRequest(assoc, req, &fd); break;
1967     case Z_APDU_presentRequest:
1968         res = process_presentRequest(assoc, req, &fd); break;
1969     case Z_APDU_scanRequest:
1970         if (assoc->init->bend_scan)
1971             res = process_scanRequest(assoc, req, &fd);
1972         else
1973         {
1974             *msg = "Cannot handle Scan APDU";
1975             return -1;
1976         }
1977         break;
1978     case Z_APDU_extendedServicesRequest:
1979         if (assoc->init->bend_esrequest)
1980             res = process_ESRequest(assoc, req, &fd);
1981         else
1982         {
1983             *msg = "Cannot handle Extended Services APDU";
1984             return -1;
1985         }
1986         break;
1987     case Z_APDU_sortRequest:
1988         if (assoc->init->bend_sort)
1989             res = process_sortRequest(assoc, req, &fd);
1990         else
1991         {
1992             *msg = "Cannot handle Sort APDU";
1993             return -1;
1994         }
1995         break;
1996     case Z_APDU_close:
1997         process_close(assoc, req);
1998         return 0;
1999     case Z_APDU_deleteResultSetRequest:
2000         if (assoc->init->bend_delete)
2001             res = process_deleteRequest(assoc, req, &fd);
2002         else
2003         {
2004             *msg = "Cannot handle Delete APDU";
2005             return -1;
2006         }
2007         break;
2008     case Z_APDU_segmentRequest:
2009         if (assoc->init->bend_segment)
2010         {
2011             res = process_segmentRequest (assoc, req);
2012         }
2013         else
2014         {
2015             *msg = "Cannot handle Segment APDU";
2016             return -1;
2017         }
2018         break;
2019     case Z_APDU_triggerResourceControlRequest:
2020         return 0;
2021     default:
2022         *msg = "Bad APDU received";
2023         return -1;
2024     }
2025     if (res)
2026     {
2027         yaz_log(YLOG_DEBUG, "  result immediately available");
2028         retval = process_z_response(assoc, req, res);
2029     }
2030     else if (fd < 0)
2031     {
2032         yaz_log(YLOG_DEBUG, "  result unavailble");
2033         retval = 0;
2034     }
2035     else /* no result yet - one will be provided later */
2036     {
2037         IOCHAN chan;
2038
2039         /* Set up an I/O handler for the fd supplied by the backend */
2040
2041         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2042         req->state = REQUEST_PENDING;
2043         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2044             abort();
2045         iochan_setdata(chan, assoc);
2046         retval = 0;
2047     }
2048     return retval;
2049 }
2050
2051 /*
2052  * Handle message from the backend.
2053  */
2054 void backend_response(IOCHAN i, int event)
2055 {
2056     association *assoc = (association *)iochan_getdata(i);
2057     request *req = request_head(&assoc->incoming);
2058     Z_APDU *res;
2059     int fd;
2060
2061     yaz_log(YLOG_DEBUG, "backend_response");
2062     assert(assoc && req && req->state != REQUEST_IDLE);
2063     /* determine what it is we're waiting for */
2064     switch (req->apdu_request->which)
2065     {
2066         case Z_APDU_searchRequest:
2067             res = response_searchRequest(assoc, req, 0, &fd); break;
2068 #if 0
2069         case Z_APDU_presentRequest:
2070             res = response_presentRequest(assoc, req, 0, &fd); break;
2071         case Z_APDU_scanRequest:
2072             res = response_scanRequest(assoc, req, 0, &fd); break;
2073 #endif
2074         default:
2075             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2076             abort();
2077     }
2078     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2079     {
2080         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2081         do_close(assoc, Z_Close_systemProblem, 0);
2082         iochan_destroy(i);
2083         return;
2084     }
2085     else if (!res) /* no result yet - try again later */
2086     {
2087         yaz_log(YLOG_DEBUG, "   no result yet");
2088         iochan_setfd(i, fd); /* in case fd has changed */
2089     }
2090 }
2091
2092 /*
2093  * Encode response, and transfer the request structure to the outgoing queue.
2094  */
2095 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2096 {
2097     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2098
2099     if (assoc->print)
2100     {
2101         if (!z_GDU(assoc->print, &res, 0, 0))
2102             yaz_log(YLOG_WARN, "ODR print error: %s",
2103                 odr_errmsg(odr_geterror(assoc->print)));
2104         odr_reset(assoc->print);
2105     }
2106     if (!z_GDU(assoc->encode, &res, 0, 0))
2107     {
2108         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2109                 odr_errmsg(odr_geterror(assoc->decode)),
2110                 odr_getelement(assoc->decode));
2111         return -1;
2112     }
2113     req->response = odr_getbuf(assoc->encode, &req->len_response,
2114         &req->size_response);
2115     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2116     odr_reset(assoc->encode);
2117     req->state = REQUEST_IDLE;
2118     request_enq(&assoc->outgoing, req);
2119     /* turn the work over to the ir_session handler */
2120     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2121     assoc->cs_put_mask = EVENT_OUTPUT;
2122     /* Is there more work to be done? give that to the input handler too */
2123     for (;;)
2124     {
2125         req = request_head(&assoc->incoming);
2126         if (req && req->state == REQUEST_IDLE)
2127         {
2128             request_deq(&assoc->incoming);
2129             process_gdu_request(assoc, req);
2130         }
2131         else
2132             break;
2133     }
2134     return 0;
2135 }
2136
2137 /*
2138  * Encode response, and transfer the request structure to the outgoing queue.
2139  */
2140 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2141 {
2142     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2143     gres->which = Z_GDU_Z3950;
2144     gres->u.z3950 = res;
2145
2146     return process_gdu_response(assoc, req, gres);
2147 }
2148
2149 static char *get_vhost(Z_OtherInformation *otherInfo)
2150 {
2151     const int *oid = yaz_string_to_oid(yaz_oid_std(),
2152                                        CLASS_USERINFO, OID_STR_PROXY);
2153     return yaz_oi_get_string_oid(&otherInfo, oid, 1, 0);
2154 }
2155
2156 /*
2157  * Handle init request.
2158  * At the moment, we don't check the options
2159  * anywhere else in the code - we just try not to do anything that would
2160  * break a naive client. We'll toss 'em into the association block when
2161  * we need them there.
2162  */
2163 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2164 {
2165     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2166     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2167     Z_InitResponse *resp = apdu->u.initResponse;
2168     bend_initresult *binitres;
2169     char *version;
2170     char options[140];
2171     statserv_options_block *cb = 0;  /* by default no control for backend */
2172
2173     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2174         cb = statserv_getcontrol();  /* got control block for backend */
2175
2176     if (cb && assoc->backend)
2177         (*cb->bend_close)(assoc->backend);
2178
2179     yaz_log(log_requestdetail, "Got initRequest");
2180     if (req->implementationId)
2181         yaz_log(log_requestdetail, "Id:        %s",
2182                 req->implementationId);
2183     if (req->implementationName)
2184         yaz_log(log_requestdetail, "Name:      %s",
2185                 req->implementationName);
2186     if (req->implementationVersion)
2187         yaz_log(log_requestdetail, "Version:   %s",
2188                 req->implementationVersion);
2189
2190     assoc_init_reset(assoc);
2191
2192     assoc->init->auth = req->idAuthentication;
2193     assoc->init->referenceId = req->referenceId;
2194
2195     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2196     {
2197         Z_CharSetandLanguageNegotiation *negotiation =
2198             yaz_get_charneg_record (req->otherInfo);
2199         if (negotiation &&
2200             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2201             assoc->init->charneg_request = negotiation;
2202     }
2203
2204     assoc->backend = 0;
2205     if (cb)
2206     {
2207         if (req->implementationVersion)
2208             yaz_log(log_requestdetail, "Config:    %s",
2209                     cb->configname);
2210
2211         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2212
2213         /* we have a backend control block, so call that init function */
2214         if (!(binitres = (*cb->bend_init)(assoc->init)))
2215         {
2216             yaz_log(YLOG_WARN, "Bad response from backend.");
2217             return 0;
2218         }
2219         assoc->backend = binitres->handle;
2220     }
2221     else
2222     {
2223         /* no backend. return error */
2224         binitres = odr_malloc(assoc->encode, sizeof(*binitres));
2225         binitres->errstring = 0;
2226         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2227         iochan_settimeout(assoc->client_chan, 10);
2228     }
2229     if ((assoc->init->bend_sort))
2230         yaz_log (YLOG_DEBUG, "Sort handler installed");
2231     if ((assoc->init->bend_search))
2232         yaz_log (YLOG_DEBUG, "Search handler installed");
2233     if ((assoc->init->bend_present))
2234         yaz_log (YLOG_DEBUG, "Present handler installed");
2235     if ((assoc->init->bend_esrequest))
2236         yaz_log (YLOG_DEBUG, "ESRequest handler installed");
2237     if ((assoc->init->bend_delete))
2238         yaz_log (YLOG_DEBUG, "Delete handler installed");
2239     if ((assoc->init->bend_scan))
2240         yaz_log (YLOG_DEBUG, "Scan handler installed");
2241     if ((assoc->init->bend_segment))
2242         yaz_log (YLOG_DEBUG, "Segment handler installed");
2243
2244     resp->referenceId = req->referenceId;
2245     *options = '\0';
2246     /* let's tell the client what we can do */
2247     if (ODR_MASK_GET(req->options, Z_Options_search))
2248     {
2249         ODR_MASK_SET(resp->options, Z_Options_search);
2250         strcat(options, "srch");
2251     }
2252     if (ODR_MASK_GET(req->options, Z_Options_present))
2253     {
2254         ODR_MASK_SET(resp->options, Z_Options_present);
2255         strcat(options, " prst");
2256     }
2257     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2258         assoc->init->bend_delete)
2259     {
2260         ODR_MASK_SET(resp->options, Z_Options_delSet);
2261         strcat(options, " del");
2262     }
2263     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2264         assoc->init->bend_esrequest)
2265     {
2266         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2267         strcat (options, " extendedServices");
2268     }
2269     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2270     {
2271         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2272         strcat(options, " namedresults");
2273     }
2274     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2275     {
2276         ODR_MASK_SET(resp->options, Z_Options_scan);
2277         strcat(options, " scan");
2278     }
2279     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2280     {
2281         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2282         strcat(options, " concurrop");
2283     }
2284     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2285     {
2286         ODR_MASK_SET(resp->options, Z_Options_sort);
2287         strcat(options, " sort");
2288     }
2289
2290     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
2291         && assoc->init->charneg_response)
2292     {
2293         Z_OtherInformation **p;
2294         Z_OtherInformationUnit *p0;
2295
2296         yaz_oi_APDU(apdu, &p);
2297
2298         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
2299             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2300
2301             p0->which = Z_OtherInfo_externallyDefinedInfo;
2302             p0->information.externallyDefinedInfo =
2303                 assoc->init->charneg_response;
2304         }
2305         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2306         strcat(options, " negotiation");
2307     }
2308
2309     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2310         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2311
2312     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2313     {
2314         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2315         assoc->version = 1; /* 1 & 2 are equivalent */
2316     }
2317     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2318     {
2319         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2320         assoc->version = 2;
2321     }
2322     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2323     {
2324         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2325         assoc->version = 3;
2326     }
2327
2328     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2329
2330     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2331         assoc->maximumRecordSize = *req->maximumRecordSize;
2332
2333     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2334         assoc->preferredMessageSize = *req->preferredMessageSize;
2335
2336     resp->preferredMessageSize = &assoc->preferredMessageSize;
2337     resp->maximumRecordSize = &assoc->maximumRecordSize;
2338
2339     resp->implementationId = odr_prepend(assoc->encode,
2340                 assoc->init->implementation_id,
2341                 resp->implementationId);
2342
2343     resp->implementationName = odr_prepend(assoc->encode,
2344                 assoc->init->implementation_name,
2345                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2346
2347     version = odr_strdup(assoc->encode, "$Revision: 1.114 $");
2348     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2349         version[strlen(version)-2] = '\0';
2350     resp->implementationVersion = odr_prepend(assoc->encode,
2351                 assoc->init->implementation_version,
2352                 odr_prepend(assoc->encode, &version[11],
2353                             resp->implementationVersion));
2354
2355     if (binitres->errcode)
2356     {
2357         assoc->state = ASSOC_DEAD;
2358         resp->userInformationField =
2359             init_diagnostics(assoc->encode, binitres->errcode,
2360                              binitres->errstring);
2361         *resp->result = 0;
2362     }
2363     if (log_request)
2364     {
2365         if (!req->idAuthentication)
2366             yaz_log(log_request, "Auth none");
2367         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2368         {
2369             const char *open = req->idAuthentication->u.open;
2370             const char *slash = strchr(open, '/');
2371             int len;
2372             if (slash)
2373                 len = slash - open;
2374             else
2375                 len = strlen(open);
2376                 yaz_log(log_request, "Auth open %.*s", len, open);
2377         }
2378         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2379         {
2380             const char *user = req->idAuthentication->u.idPass->userId;
2381             const char *group = req->idAuthentication->u.idPass->groupId;
2382             yaz_log(log_request, "Auth idPass %s %s",
2383                     user ? user : "-", group ? group : "-");
2384         }
2385         else if (req->idAuthentication->which
2386                  == Z_IdAuthentication_anonymous)
2387         {
2388             yaz_log(log_request, "Auth anonymous");
2389         }
2390         else
2391         {
2392             yaz_log(log_request, "Auth other");
2393         }
2394     }
2395     if (log_request)
2396     {
2397         WRBUF wr = wrbuf_alloc();
2398         wrbuf_printf(wr, "Init ");
2399         if (binitres->errcode)
2400             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2401         else
2402             wrbuf_printf(wr, "OK -");
2403         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2404                      (req->implementationId ? req->implementationId :"-"),
2405                      (req->implementationName ?
2406                       req->implementationName : "-"),
2407                      (req->implementationVersion ?
2408                       req->implementationVersion : "-")
2409             );
2410         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2411         wrbuf_destroy(wr);
2412     }
2413     return apdu;
2414 }
2415
2416 /*
2417  * Set the specified `errcode' and `errstring' into a UserInfo-1
2418  * external to be returned to the client in accordance with Z35.90
2419  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2420  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2421  */
2422 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2423 {
2424     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2425         addinfo ? " -- " : "", addinfo ? addinfo : "");
2426     return zget_init_diagnostics(odr, error, addinfo);
2427 }
2428
2429 /*
2430  * nonsurrogate diagnostic record.
2431  */
2432 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2433 {
2434     Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec));
2435
2436     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2437             addinfo ? " -- " : "", addinfo ? addinfo : "");
2438
2439     rec->which = Z_Records_NSD;
2440     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2441                                                            error, addinfo);
2442     return rec;
2443 }
2444
2445 /*
2446  * surrogate diagnostic.
2447  */
2448 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2449                                           const char *dbname,
2450                                           int error, const char *addinfo)
2451 {
2452     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2453             addinfo ? " -- " : "", addinfo ? addinfo : "");
2454     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2455 }
2456
2457 static Z_Records *pack_records(association *a, char *setname, int start,
2458                                int *num, Z_RecordComposition *comp,
2459                                int *next, int *pres,
2460                                Z_ReferenceId *referenceId,
2461                                int *oid, int *errcode)
2462 {
2463     int recno, total_length = 0, toget = *num, dumped_records = 0;
2464     Z_Records *records =
2465         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
2466     Z_NamePlusRecordList *reclist =
2467         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
2468     Z_NamePlusRecord **list =
2469         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
2470
2471     records->which = Z_Records_DBOSD;
2472     records->u.databaseOrSurDiagnostics = reclist;
2473     reclist->num_records = 0;
2474     reclist->records = list;
2475     *pres = Z_PresentStatus_success;
2476     *num = 0;
2477     *next = 0;
2478
2479     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2480     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2481         a->maximumRecordSize);
2482     for (recno = start; reclist->num_records < toget; recno++)
2483     {
2484         bend_fetch_rr freq;
2485         Z_NamePlusRecord *thisrec;
2486         int this_length = 0;
2487         /*
2488          * we get the number of bytes allocated on the stream before any
2489          * allocation done by the backend - this should give us a reasonable
2490          * idea of the total size of the data so far.
2491          */
2492         total_length = odr_total(a->encode) - dumped_records;
2493         freq.errcode = 0;
2494         freq.errstring = 0;
2495         freq.basename = 0;
2496         freq.len = 0;
2497         freq.record = 0;
2498         freq.last_in_set = 0;
2499         freq.setname = setname;
2500         freq.surrogate_flag = 0;
2501         freq.number = recno;
2502         freq.comp = comp;
2503         freq.request_format = oid;
2504         freq.output_format = 0;
2505         freq.stream = a->encode;
2506         freq.print = a->print;
2507         freq.referenceId = referenceId;
2508         freq.schema = 0;
2509
2510         retrieve_fetch(a, &freq);
2511
2512         *next = freq.last_in_set ? 0 : recno + 1;
2513
2514         /* backend should be able to signal whether error is system-wide
2515            or only pertaining to current record */
2516         if (freq.errcode)
2517         {
2518             if (!freq.surrogate_flag)
2519             {
2520                 char s[20];
2521                 *pres = Z_PresentStatus_failure;
2522                 /* for 'present request out of range',
2523                    set addinfo to record position if not set */
2524                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2525                                 freq.errstring == 0)
2526                 {
2527                     sprintf (s, "%d", recno);
2528                     freq.errstring = s;
2529                 }
2530                 if (errcode)
2531                     *errcode = freq.errcode;
2532                 return diagrec(a, freq.errcode, freq.errstring);
2533             }
2534             reclist->records[reclist->num_records] =
2535                 surrogatediagrec(a, freq.basename, freq.errcode,
2536                                  freq.errstring);
2537             reclist->num_records++;
2538             continue;
2539         }
2540         if (freq.record == 0)  /* no error and no record ? */
2541         {
2542             *next = 0;   /* signal end-of-set and stop */
2543             break;
2544         }
2545         if (freq.len >= 0)
2546             this_length = freq.len;
2547         else
2548             this_length = odr_total(a->encode) - total_length - dumped_records;
2549         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2550             this_length, total_length, dumped_records);
2551         if (a->preferredMessageSize > 0 &&
2552                 this_length + total_length > a->preferredMessageSize)
2553         {
2554             /* record is small enough, really */
2555             if (this_length <= a->preferredMessageSize && recno > start)
2556             {
2557                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2558                 *pres = Z_PresentStatus_partial_2;
2559                 break;
2560             }
2561             /* record can only be fetched by itself */
2562             if (this_length < a->maximumRecordSize)
2563             {
2564                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2565                 if (toget > 1)
2566                 {
2567                     yaz_log(YLOG_DEBUG, "  Dropped it");
2568                     reclist->records[reclist->num_records] =
2569                          surrogatediagrec(a, freq.basename, 16, 0);
2570                     reclist->num_records++;
2571                     dumped_records += this_length;
2572                     continue;
2573                 }
2574             }
2575             else /* too big entirely */
2576             {
2577                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2578                         this_length, a->maximumRecordSize);
2579                 reclist->records[reclist->num_records] =
2580                     surrogatediagrec(a, freq.basename, 17, 0);
2581                 reclist->num_records++;
2582                 dumped_records += this_length;
2583                 continue;
2584             }
2585         }
2586
2587         if (!(thisrec = (Z_NamePlusRecord *)
2588               odr_malloc(a->encode, sizeof(*thisrec))))
2589             return 0;
2590         if (freq.basename)
2591             thisrec->databaseName = odr_strdup(a->encode, freq.basename);
2592         else
2593             thisrec->databaseName = 0;
2594         thisrec->which = Z_NamePlusRecord_databaseRecord;
2595
2596         if (!freq.output_format)
2597             freq.output_format = freq.request_format;
2598         thisrec->u.databaseRecord = z_ext_record_oid(
2599             a->encode, freq.output_format, freq.record, freq.len);
2600         if (!thisrec->u.databaseRecord)
2601             return 0;
2602         reclist->records[reclist->num_records] = thisrec;
2603         reclist->num_records++;
2604     }
2605     *num = reclist->num_records;
2606     return records;
2607 }
2608
2609 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2610     int *fd)
2611 {
2612     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2613     bend_search_rr *bsrr =
2614         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
2615
2616     yaz_log(log_requestdetail, "Got SearchRequest.");
2617     bsrr->fd = fd;
2618     bsrr->request = reqb;
2619     bsrr->association = assoc;
2620     bsrr->referenceId = req->referenceId;
2621     save_referenceId (reqb, bsrr->referenceId);
2622     bsrr->srw_sortKeys = 0;
2623     bsrr->srw_setname = 0;
2624     bsrr->srw_setnameIdleTime = 0;
2625     bsrr->estimated_hit_count = 0;
2626     bsrr->partial_resultset = 0;
2627
2628     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2629     if (req->databaseNames)
2630     {
2631         int i;
2632         for (i = 0; i < req->num_databaseNames; i++)
2633             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2634     }
2635
2636     yaz_log_zquery_level(log_requestdetail,req->query);
2637
2638     if (assoc->init->bend_search)
2639     {
2640         bsrr->setname = req->resultSetName;
2641         bsrr->replace_set = *req->replaceIndicator;
2642         bsrr->num_bases = req->num_databaseNames;
2643         bsrr->basenames = req->databaseNames;
2644         bsrr->query = req->query;
2645         bsrr->stream = assoc->encode;
2646         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2647         bsrr->decode = assoc->decode;
2648         bsrr->print = assoc->print;
2649         bsrr->hits = 0;
2650         bsrr->errcode = 0;
2651         bsrr->errstring = NULL;
2652         bsrr->search_info = NULL;
2653
2654         if (assoc->server && assoc->server->cql_transform
2655             && req->query->which == Z_Query_type_104
2656             && req->query->u.type_104->which == Z_External_CQL)
2657         {
2658             /* have a CQL query and a CQL to PQF transform .. */
2659             int srw_errcode =
2660                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2661                         assoc->server->cql_transform, bsrr->query);
2662             if (srw_errcode)
2663                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2664         }
2665         if (!bsrr->errcode)
2666             (assoc->init->bend_search)(assoc->backend, bsrr);
2667         if (!bsrr->request)  /* backend not ready with the search response */
2668             return 0;  /* should not be used any more */
2669     }
2670     else
2671     {
2672         /* FIXME - make a diagnostic for it */
2673         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2674     }
2675     return response_searchRequest(assoc, reqb, bsrr, fd);
2676 }
2677
2678 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2679
2680 /*
2681  * Prepare a searchresponse based on the backend results. We probably want
2682  * to look at making the fetching of records nonblocking as well, but
2683  * so far, we'll keep things simple.
2684  * If bsrt is null, that means we're called in response to a communications
2685  * event, and we'll have to get the response for ourselves.
2686  */
2687 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2688     bend_search_rr *bsrt, int *fd)
2689 {
2690     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2691     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2692     Z_SearchResponse *resp = (Z_SearchResponse *)
2693         odr_malloc (assoc->encode, sizeof(*resp));
2694     int *nulint = odr_intdup (assoc->encode, 0);
2695     int *next = odr_intdup(assoc->encode, 0);
2696     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2697     int returnedrecs = 0;
2698
2699     apdu->which = Z_APDU_searchResponse;
2700     apdu->u.searchResponse = resp;
2701     resp->referenceId = req->referenceId;
2702     resp->additionalSearchInfo = 0;
2703     resp->otherInfo = 0;
2704     *fd = -1;
2705     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2706     {
2707         yaz_log(YLOG_FATAL, "Bad result from backend");
2708         return 0;
2709     }
2710     else if (bsrt->errcode)
2711     {
2712         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2713         resp->resultCount = nulint;
2714         resp->numberOfRecordsReturned = nulint;
2715         resp->nextResultSetPosition = nulint;
2716         resp->searchStatus = nulint;
2717         resp->resultSetStatus = none;
2718         resp->presentStatus = 0;
2719     }
2720     else
2721     {
2722         bool_t *sr = odr_intdup(assoc->encode, 1);
2723         int *toget = odr_intdup(assoc->encode, 0);
2724         Z_RecordComposition comp, *compp = 0;
2725
2726         yaz_log (log_requestdetail, "resultCount: %d", bsrt->hits);
2727
2728         resp->records = 0;
2729         resp->resultCount = &bsrt->hits;
2730
2731         comp.which = Z_RecordComp_simple;
2732         /* how many records does the user agent want, then? */
2733         if (bsrt->hits <= *req->smallSetUpperBound)
2734         {
2735             *toget = bsrt->hits;
2736             if ((comp.u.simple = req->smallSetElementSetNames))
2737                 compp = &comp;
2738         }
2739         else if (bsrt->hits < *req->largeSetLowerBound)
2740         {
2741             *toget = *req->mediumSetPresentNumber;
2742             if (*toget > bsrt->hits)
2743                 *toget = bsrt->hits;
2744             if ((comp.u.simple = req->mediumSetElementSetNames))
2745                 compp = &comp;
2746         }
2747         else
2748             *toget = 0;
2749
2750         if (*toget && !resp->records)
2751         {
2752             int *presst = odr_intdup(assoc->encode, 0);
2753             /* Call bend_present if defined */
2754             if (assoc->init->bend_present)
2755             {
2756                 bend_present_rr *bprr = (bend_present_rr *)
2757                     nmem_malloc (reqb->request_mem, sizeof(*bprr));
2758                 bprr->setname = req->resultSetName;
2759                 bprr->start = 1;
2760                 bprr->number = *toget;
2761                 bprr->format = req->preferredRecordSyntax;
2762                 bprr->comp = compp;
2763                 bprr->referenceId = req->referenceId;
2764                 bprr->stream = assoc->encode;
2765                 bprr->print = assoc->print;
2766                 bprr->request = reqb;
2767                 bprr->association = assoc;
2768                 bprr->errcode = 0;
2769                 bprr->errstring = NULL;
2770                 (*assoc->init->bend_present)(assoc->backend, bprr);
2771
2772                 if (!bprr->request)
2773                     return 0;
2774                 if (bprr->errcode)
2775                 {
2776                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2777                     *resp->presentStatus = Z_PresentStatus_failure;
2778                 }
2779             }
2780
2781             if (!resp->records)
2782                 resp->records = pack_records(
2783                     assoc, req->resultSetName, 1,
2784                     toget, compp, next, presst, req->referenceId,
2785                     req->preferredRecordSyntax, NULL);
2786             if (!resp->records)
2787                 return 0;
2788             resp->numberOfRecordsReturned = toget;
2789             returnedrecs = *toget;
2790             resp->presentStatus = presst;
2791         }
2792         else
2793         {
2794             if (*resp->resultCount)
2795                 *next = 1;
2796             resp->numberOfRecordsReturned = nulint;
2797             resp->presentStatus = 0;
2798         }
2799         resp->nextResultSetPosition = next;
2800         resp->searchStatus = sr;
2801         resp->resultSetStatus = 0;
2802         if (bsrt->estimated_hit_count)
2803         {
2804             resp->resultSetStatus = odr_intdup(assoc->encode,
2805                                                Z_SearchResponse_estimate);
2806         }
2807         else if (bsrt->partial_resultset)
2808         {
2809             resp->resultSetStatus = odr_intdup(assoc->encode,
2810                                                Z_SearchResponse_subset);
2811         }
2812     }
2813     resp->additionalSearchInfo = bsrt->search_info;
2814
2815     if (log_request)
2816     {
2817         int i;
2818         WRBUF wr = wrbuf_alloc();
2819
2820         for (i = 0 ; i < req->num_databaseNames; i++){
2821             if (i)
2822                 wrbuf_printf(wr, "+");
2823             wrbuf_printf(wr, req->databaseNames[i]);
2824         }
2825         wrbuf_printf(wr, " ");
2826
2827         if (bsrt->errcode)
2828             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2829         else
2830             wrbuf_printf(wr, "OK %d", bsrt->hits);
2831         wrbuf_printf(wr, " %s 1+%d ",
2832                      req->resultSetName, returnedrecs);
2833         yaz_query_to_wrbuf(wr, req->query);
2834
2835         yaz_log(log_request, "Search %s", wrbuf_cstr(wr));
2836         wrbuf_destroy(wr);
2837     }
2838     return apdu;
2839 }
2840
2841 /*
2842  * Maybe we got a little over-friendly when we designed bend_fetch to
2843  * get only one record at a time. Some backends can optimise multiple-record
2844  * fetches, and at any rate, there is some overhead involved in
2845  * all that selecting and hopping around. Problem is, of course, that the
2846  * frontend can't know ahead of time how many records it'll need to
2847  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2848  * is downright lousy as a bulk data transfer protocol.
2849  *
2850  * To start with, we'll do the fetching of records from the backend
2851  * in one operation: To save some trips in and out of the event-handler,
2852  * and to simplify the interface to pack_records. At any rate, asynch
2853  * operation is more fun in operations that have an unpredictable execution
2854  * speed - which is normally more true for search than for present.
2855  */
2856 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2857                                       int *fd)
2858 {
2859     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2860     Z_APDU *apdu;
2861     Z_PresentResponse *resp;
2862     int *next;
2863     int *num;
2864     int errcode = 0;
2865     const char *errstring = 0;
2866
2867     yaz_log(log_requestdetail, "Got PresentRequest.");
2868
2869     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2870     resp->records = 0;
2871     resp->presentStatus = odr_intdup(assoc->encode, 0);
2872     if (assoc->init->bend_present)
2873     {
2874         bend_present_rr *bprr = (bend_present_rr *)
2875             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2876         bprr->setname = req->resultSetId;
2877         bprr->start = *req->resultSetStartPoint;
2878         bprr->number = *req->numberOfRecordsRequested;
2879         bprr->format = req->preferredRecordSyntax;
2880         bprr->comp = req->recordComposition;
2881         bprr->referenceId = req->referenceId;
2882         bprr->stream = assoc->encode;
2883         bprr->print = assoc->print;
2884         bprr->request = reqb;
2885         bprr->association = assoc;
2886         bprr->errcode = 0;
2887         bprr->errstring = NULL;
2888         (*assoc->init->bend_present)(assoc->backend, bprr);
2889
2890         if (!bprr->request)
2891             return 0; /* should not happen */
2892         if (bprr->errcode)
2893         {
2894             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2895             *resp->presentStatus = Z_PresentStatus_failure;
2896             errcode = bprr->errcode;
2897             errstring = bprr->errstring;
2898         }
2899     }
2900     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2901     next = odr_intdup(assoc->encode, 0);
2902     num = odr_intdup(assoc->encode, 0);
2903
2904     apdu->which = Z_APDU_presentResponse;
2905     apdu->u.presentResponse = resp;
2906     resp->referenceId = req->referenceId;
2907     resp->otherInfo = 0;
2908
2909     if (!resp->records)
2910     {
2911         *num = *req->numberOfRecordsRequested;
2912         resp->records =
2913             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2914                          num, req->recordComposition, next,
2915                          resp->presentStatus,
2916                          req->referenceId, req->preferredRecordSyntax,
2917                          &errcode);
2918     }
2919     if (log_request)
2920     {
2921         WRBUF wr = wrbuf_alloc();
2922         wrbuf_printf(wr, "Present ");
2923
2924         if (*resp->presentStatus == Z_PresentStatus_failure)
2925             wrbuf_printf(wr, "ERROR %d ", errcode);
2926         else if (*resp->presentStatus == Z_PresentStatus_success)
2927             wrbuf_printf(wr, "OK -  ");
2928         else
2929             wrbuf_printf(wr, "Partial %d - ", *resp->presentStatus);
2930
2931         wrbuf_printf(wr, " %s %d+%d ",
2932                 req->resultSetId, *req->resultSetStartPoint,
2933                 *req->numberOfRecordsRequested);
2934         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
2935         wrbuf_destroy(wr);
2936     }
2937     if (!resp->records)
2938         return 0;
2939     resp->numberOfRecordsReturned = num;
2940     resp->nextResultSetPosition = next;
2941
2942     return apdu;
2943 }
2944
2945 /*
2946  * Scan was implemented rather in a hurry, and with support for only the basic
2947  * elements of the service in the backend API. Suggestions are welcome.
2948  */
2949 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2950 {
2951     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2952     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2953     Z_ScanResponse *res = (Z_ScanResponse *)
2954         odr_malloc (assoc->encode, sizeof(*res));
2955     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2956     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2957     Z_ListEntries *ents = (Z_ListEntries *)
2958         odr_malloc (assoc->encode, sizeof(*ents));
2959     Z_DiagRecs *diagrecs_p = NULL;
2960     bend_scan_rr *bsrr = (bend_scan_rr *)
2961         odr_malloc (assoc->encode, sizeof(*bsrr));
2962     struct scan_entry *save_entries;
2963
2964     yaz_log(log_requestdetail, "Got ScanRequest");
2965
2966     apdu->which = Z_APDU_scanResponse;
2967     apdu->u.scanResponse = res;
2968     res->referenceId = req->referenceId;
2969
2970     /* if step is absent, set it to 0 */
2971     res->stepSize = odr_intdup(assoc->encode, 0);
2972     if (req->stepSize)
2973         *res->stepSize = *req->stepSize;
2974
2975     res->scanStatus = scanStatus;
2976     res->numberOfEntriesReturned = numberOfEntriesReturned;
2977     res->positionOfTerm = 0;
2978     res->entries = ents;
2979     ents->num_entries = 0;
2980     ents->entries = NULL;
2981     ents->num_nonsurrogateDiagnostics = 0;
2982     ents->nonsurrogateDiagnostics = NULL;
2983     res->attributeSet = 0;
2984     res->otherInfo = 0;
2985
2986     if (req->databaseNames)
2987     {
2988         int i;
2989         for (i = 0; i < req->num_databaseNames; i++)
2990             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2991     }
2992     bsrr->scanClause = 0;
2993     bsrr->errcode = 0;
2994     bsrr->errstring = 0;
2995     bsrr->num_bases = req->num_databaseNames;
2996     bsrr->basenames = req->databaseNames;
2997     bsrr->num_entries = *req->numberOfTermsRequested;
2998     bsrr->term = req->termListAndStartPoint;
2999     bsrr->referenceId = req->referenceId;
3000     bsrr->stream = assoc->encode;
3001     bsrr->print = assoc->print;
3002     bsrr->step_size = res->stepSize;
3003     bsrr->entries = 0;
3004     /* For YAZ 2.0 and earlier it was the backend handler that
3005        initialized entries (member display_term did not exist)
3006        YAZ 2.0 and later sets 'entries'  and initialize all members
3007        including 'display_term'. If YAZ 2.0 or later sees that
3008        entries was modified - we assume that it is an old handler and
3009        that 'display_term' is _not_ set.
3010     */
3011     if (bsrr->num_entries > 0)
3012     {
3013         int i;
3014         bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3015                                    bsrr->num_entries);
3016         for (i = 0; i<bsrr->num_entries; i++)
3017         {
3018             bsrr->entries[i].term = 0;
3019             bsrr->entries[i].occurrences = 0;
3020             bsrr->entries[i].errcode = 0;
3021             bsrr->entries[i].errstring = 0;
3022             bsrr->entries[i].display_term = 0;
3023         }
3024     }
3025     save_entries = bsrr->entries;  /* save it so we can compare later */
3026
3027     bsrr->attributeset = req->attributeSet;
3028     log_scan_term_level (log_requestdetail, req->termListAndStartPoint,
3029             bsrr->attributeset);
3030     bsrr->term_position = req->preferredPositionInResponse ?
3031         *req->preferredPositionInResponse : 1;
3032
3033     ((int (*)(void *, bend_scan_rr *))
3034      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3035
3036     if (bsrr->errcode)
3037         diagrecs_p = zget_DiagRecs(assoc->encode,
3038                                    bsrr->errcode, bsrr->errstring);
3039     else
3040     {
3041         int i;
3042         Z_Entry **tab = (Z_Entry **)
3043             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
3044
3045         if (bsrr->status == BEND_SCAN_PARTIAL)
3046             *scanStatus = Z_Scan_partial_5;
3047         else
3048             *scanStatus = Z_Scan_success;
3049         ents->entries = tab;
3050         ents->num_entries = bsrr->num_entries;
3051         res->numberOfEntriesReturned = &ents->num_entries;
3052         res->positionOfTerm = &bsrr->term_position;
3053         for (i = 0; i < bsrr->num_entries; i++)
3054         {
3055             Z_Entry *e;
3056             Z_TermInfo *t;
3057             Odr_oct *o;
3058
3059             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3060             if (bsrr->entries[i].occurrences >= 0)
3061             {
3062                 e->which = Z_Entry_termInfo;
3063                 e->u.termInfo = t = (Z_TermInfo *)
3064                     odr_malloc(assoc->encode, sizeof(*t));
3065                 t->suggestedAttributes = 0;
3066                 t->displayTerm = 0;
3067                 if (save_entries == bsrr->entries &&
3068                     bsrr->entries[i].display_term)
3069                 {
3070                     /* the entries was _not_ set by the handler. So it's
3071                        safe to test for new member display_term. It is
3072                        NULL'ed by us.
3073                     */
3074                     t->displayTerm = odr_strdup(assoc->encode,
3075                                                 bsrr->entries[i].display_term);
3076                 }
3077                 t->alternativeTerm = 0;
3078                 t->byAttributes = 0;
3079                 t->otherTermInfo = 0;
3080                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3081                 t->term = (Z_Term *)
3082                     odr_malloc(assoc->encode, sizeof(*t->term));
3083                 t->term->which = Z_Term_general;
3084                 t->term->u.general = o =
3085                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3086                 o->buf = (unsigned char *)
3087                     odr_malloc(assoc->encode, o->len = o->size =
3088                                strlen(bsrr->entries[i].term));
3089                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3090                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3091                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3092             }
3093             else
3094             {
3095                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3096                                                   bsrr->entries[i].errcode,
3097                                                   bsrr->entries[i].errstring);
3098                 assert (drecs->num_diagRecs == 1);
3099                 e->which = Z_Entry_surrogateDiagnostic;
3100                 assert (drecs->diagRecs[0]);
3101                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3102             }
3103         }
3104     }
3105     if (diagrecs_p)
3106     {
3107         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3108         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3109     }
3110     if (log_request)
3111     {
3112         int i;
3113         WRBUF wr = wrbuf_alloc();
3114         wrbuf_printf(wr, "Scan ");
3115         for (i = 0 ; i < req->num_databaseNames; i++){
3116             if (i)
3117                 wrbuf_printf(wr, "+");
3118             wrbuf_printf(wr, req->databaseNames[i]);
3119         }
3120         wrbuf_printf(wr, " ");
3121
3122         if (bsrr->errcode){
3123             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3124             wrbuf_printf(wr, " ");
3125         }
3126         else
3127             wrbuf_printf(wr, "OK ");
3128         /* else if (*res->scanStatus == Z_Scan_success) */
3129         /*    wrbuf_printf(wr, "OK "); */
3130         /* else */
3131         /* wrbuf_printf(wr, "Partial "); */
3132
3133         if (*res->numberOfEntriesReturned)
3134             wrbuf_printf(wr, "%d - ", *res->numberOfEntriesReturned);
3135         else
3136             wrbuf_printf(wr, "0 - ");
3137
3138         wrbuf_printf(wr, "%d+%d+%d ",
3139                      (req->preferredPositionInResponse ?
3140                       *req->preferredPositionInResponse : 1),
3141                      *req->numberOfTermsRequested,
3142                      (res->stepSize ? *res->stepSize : 1));
3143
3144         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3145                           bsrr->attributeset);
3146         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3147         wrbuf_destroy(wr);
3148     }
3149     return apdu;
3150 }
3151
3152 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3153     int *fd)
3154 {
3155     int i;
3156     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3157     Z_SortResponse *res = (Z_SortResponse *)
3158         odr_malloc (assoc->encode, sizeof(*res));
3159     bend_sort_rr *bsrr = (bend_sort_rr *)
3160         odr_malloc (assoc->encode, sizeof(*bsrr));
3161
3162     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3163
3164     yaz_log(log_requestdetail, "Got SortRequest.");
3165
3166     bsrr->num_input_setnames = req->num_inputResultSetNames;
3167     for (i=0;i<req->num_inputResultSetNames;i++)
3168         yaz_log(log_requestdetail, "Input resultset: '%s'",
3169                 req->inputResultSetNames[i]);
3170     bsrr->input_setnames = req->inputResultSetNames;
3171     bsrr->referenceId = req->referenceId;
3172     bsrr->output_setname = req->sortedResultSetName;
3173     yaz_log(log_requestdetail, "Output resultset: '%s'",
3174                 req->sortedResultSetName);
3175     bsrr->sort_sequence = req->sortSequence;
3176        /*FIXME - dump those sequences too */
3177     bsrr->stream = assoc->encode;
3178     bsrr->print = assoc->print;
3179
3180     bsrr->sort_status = Z_SortResponse_failure;
3181     bsrr->errcode = 0;
3182     bsrr->errstring = 0;
3183
3184     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3185
3186     res->referenceId = bsrr->referenceId;
3187     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3188     res->resultSetStatus = 0;
3189     if (bsrr->errcode)
3190     {
3191         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3192                                        bsrr->errcode, bsrr->errstring);
3193         res->diagnostics = dr->diagRecs;
3194         res->num_diagnostics = dr->num_diagRecs;
3195     }
3196     else
3197     {
3198         res->num_diagnostics = 0;
3199         res->diagnostics = 0;
3200     }
3201     res->resultCount = 0;
3202     res->otherInfo = 0;
3203
3204     apdu->which = Z_APDU_sortResponse;
3205     apdu->u.sortResponse = res;
3206     if (log_request)
3207     {
3208         WRBUF wr = wrbuf_alloc();
3209         wrbuf_printf(wr, "Sort ");
3210         if (bsrr->errcode)
3211             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3212         else
3213             wrbuf_printf(wr,  "OK -");
3214         wrbuf_printf(wr, " (");
3215         for (i = 0; i<req->num_inputResultSetNames; i++)
3216         {
3217             if (i)
3218                 wrbuf_printf(wr, "+");
3219             wrbuf_printf(wr, req->inputResultSetNames[i]);
3220         }
3221         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3222
3223         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3224         wrbuf_destroy(wr);
3225     }
3226     return apdu;
3227 }
3228
3229 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3230     int *fd)
3231 {
3232     int i;
3233     Z_DeleteResultSetRequest *req =
3234         reqb->apdu_request->u.deleteResultSetRequest;
3235     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3236         odr_malloc (assoc->encode, sizeof(*res));
3237     bend_delete_rr *bdrr = (bend_delete_rr *)
3238         odr_malloc (assoc->encode, sizeof(*bdrr));
3239     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3240
3241     yaz_log(log_requestdetail, "Got DeleteRequest.");
3242
3243     bdrr->num_setnames = req->num_resultSetList;
3244     bdrr->setnames = req->resultSetList;
3245     for (i = 0; i<req->num_resultSetList; i++)
3246         yaz_log(log_requestdetail, "resultset: '%s'",
3247                 req->resultSetList[i]);
3248     bdrr->stream = assoc->encode;
3249     bdrr->print = assoc->print;
3250     bdrr->function = *req->deleteFunction;
3251     bdrr->referenceId = req->referenceId;
3252     bdrr->statuses = 0;
3253     if (bdrr->num_setnames > 0)
3254     {
3255         bdrr->statuses = (int*)
3256             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3257                        bdrr->num_setnames);
3258         for (i = 0; i < bdrr->num_setnames; i++)
3259             bdrr->statuses[i] = 0;
3260     }
3261     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3262
3263     res->referenceId = req->referenceId;
3264
3265     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3266
3267     res->deleteListStatuses = 0;
3268     if (bdrr->num_setnames > 0)
3269     {
3270         int i;
3271         res->deleteListStatuses = (Z_ListStatuses *)
3272             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3273         res->deleteListStatuses->num = bdrr->num_setnames;
3274         res->deleteListStatuses->elements =
3275             (Z_ListStatus **)
3276             odr_malloc (assoc->encode,
3277                         sizeof(*res->deleteListStatuses->elements) *
3278                         bdrr->num_setnames);
3279         for (i = 0; i<bdrr->num_setnames; i++)
3280         {
3281             res->deleteListStatuses->elements[i] =
3282                 (Z_ListStatus *)
3283                 odr_malloc (assoc->encode,
3284                             sizeof(**res->deleteListStatuses->elements));
3285             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3286             res->deleteListStatuses->elements[i]->id =
3287                 odr_strdup (assoc->encode, bdrr->setnames[i]);
3288         }
3289     }
3290     res->numberNotDeleted = 0;
3291     res->bulkStatuses = 0;
3292     res->deleteMessage = 0;
3293     res->otherInfo = 0;
3294
3295     apdu->which = Z_APDU_deleteResultSetResponse;
3296     apdu->u.deleteResultSetResponse = res;
3297     if (log_request)
3298     {
3299         WRBUF wr = wrbuf_alloc();
3300         wrbuf_printf(wr, "Delete ");
3301         if (bdrr->delete_status)
3302             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3303         else
3304             wrbuf_printf(wr, "OK -");
3305         for (i = 0; i<req->num_resultSetList; i++)
3306             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3307         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3308         wrbuf_destroy(wr);
3309     }
3310     return apdu;
3311 }
3312
3313 static void process_close(association *assoc, request *reqb)
3314 {
3315     Z_Close *req = reqb->apdu_request->u.close;
3316     static char *reasons[] =
3317     {
3318         "finished",
3319         "shutdown",
3320         "systemProblem",
3321         "costLimit",
3322         "resources",
3323         "securityViolation",
3324         "protocolError",
3325         "lackOfActivity",
3326         "peerAbort",
3327         "unspecified"
3328     };
3329
3330     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3331         reasons[*req->closeReason], req->diagnosticInformation ?
3332         req->diagnosticInformation : "NULL");
3333     if (assoc->version < 3) /* to make do_force respond with close */
3334         assoc->version = 3;
3335     do_close_req(assoc, Z_Close_finished,
3336                  "Association terminated by client", reqb);
3337     yaz_log(log_request,"Close OK");
3338 }
3339
3340 void save_referenceId (request *reqb, Z_ReferenceId *refid)
3341 {
3342     if (refid)
3343     {
3344         reqb->len_refid = refid->len;
3345         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
3346         memcpy (reqb->refid, refid->buf, refid->len);
3347     }
3348     else
3349     {
3350         reqb->len_refid = 0;
3351         reqb->refid = NULL;
3352     }
3353 }
3354
3355 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
3356 {
3357     process_z_response (a, req, res);
3358 }
3359
3360 bend_request bend_request_mk (bend_association a)
3361 {
3362     request *nreq = request_get (&a->outgoing);
3363     nreq->request_mem = nmem_create ();
3364     return nreq;
3365 }
3366
3367 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
3368 {
3369     Z_ReferenceId *id;
3370     if (!req->refid)
3371         return 0;
3372     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
3373     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
3374     id->len = id->size = req->len_refid;
3375     memcpy (id->buf, req->refid, req->len_refid);
3376     return id;
3377 }
3378
3379 void bend_request_destroy (bend_request *req)
3380 {
3381     nmem_destroy((*req)->request_mem);
3382     request_release(*req);
3383     *req = NULL;
3384 }
3385
3386 int bend_backend_respond (bend_association a, bend_request req)
3387 {
3388     char *msg;
3389     int r;
3390     r = process_z_request (a, req, &msg);
3391     if (r < 0)
3392         yaz_log (YLOG_WARN, "%s", msg);
3393     return r;
3394 }
3395
3396 void bend_request_setdata(bend_request r, void *p)
3397 {
3398     r->clientData = p;
3399 }
3400
3401 void *bend_request_getdata(bend_request r)
3402 {
3403     return r->clientData;
3404 }
3405
3406 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
3407 {
3408     bend_segment_rr req;
3409
3410     req.segment = reqb->apdu_request->u.segmentRequest;
3411     req.stream = assoc->encode;
3412     req.decode = assoc->decode;
3413     req.print = assoc->print;
3414     req.association = assoc;
3415
3416     (*assoc->init->bend_segment)(assoc->backend, &req);
3417
3418     return 0;
3419 }
3420
3421 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3422 {
3423     bend_esrequest_rr esrequest;
3424     const char *ext_name = "unknown";
3425
3426     Z_ExtendedServicesRequest *req =
3427         reqb->apdu_request->u.extendedServicesRequest;
3428     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3429
3430     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3431
3432     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3433     esrequest.stream = assoc->encode;
3434     esrequest.decode = assoc->decode;
3435     esrequest.print = assoc->print;
3436     esrequest.errcode = 0;
3437     esrequest.errstring = NULL;
3438     esrequest.request = reqb;
3439     esrequest.association = assoc;
3440     esrequest.taskPackage = 0;
3441     esrequest.referenceId = req->referenceId;
3442
3443
3444     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3445     {
3446         switch(esrequest.esr->taskSpecificParameters->which)
3447         {
3448         case Z_External_itemOrder:
3449             ext_name = "ItemOrder"; break;
3450         case Z_External_update:
3451             ext_name = "Update"; break;
3452         case Z_External_update0:
3453             ext_name = "Update0"; break;
3454         case Z_External_ESAdmin:
3455             ext_name = "Admin"; break;
3456
3457         }
3458     }
3459
3460     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3461
3462     /* If the response is being delayed, return NULL */
3463     if (esrequest.request == NULL)
3464         return(NULL);
3465
3466     resp->referenceId = req->referenceId;
3467
3468     if (esrequest.errcode == -1)
3469     {
3470         /* Backend service indicates request will be processed */
3471         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3472         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3473     }
3474     else if (esrequest.errcode == 0)
3475     {
3476         /* Backend service indicates request will be processed */
3477         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3478         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3479     }
3480     else
3481     {
3482         Z_DiagRecs *diagRecs =
3483             zget_DiagRecs(assoc->encode, esrequest.errcode,
3484                           esrequest.errstring);
3485         /* Backend indicates error, request will not be processed */
3486         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3487         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3488         resp->num_diagnostics = diagRecs->num_diagRecs;
3489         resp->diagnostics = diagRecs->diagRecs;
3490         if (log_request)
3491         {
3492             WRBUF wr = wrbuf_alloc();
3493             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3494             yaz_log(log_request, "EsRequest %s", wrbuf_cstr(wr) );
3495             wrbuf_destroy(wr);
3496         }
3497
3498     }
3499     /* Do something with the members of bend_extendedservice */
3500     if (esrequest.taskPackage)
3501     {
3502         const int *oid = yaz_string_to_oid(yaz_oid_std(),
3503                                            CLASS_EXTSERV, OID_STR_EXTENDED);
3504         resp->taskPackage = z_ext_record_oid(assoc->encode, oid,
3505                                              (const char *)  esrequest.taskPackage,
3506                                              -1);
3507     }
3508     yaz_log(YLOG_DEBUG,"Send the result apdu");
3509     return apdu;
3510 }
3511
3512 int bend_assoc_is_alive(bend_association assoc)
3513 {
3514     if (assoc->state == ASSOC_DEAD)
3515         return 0; /* already marked as dead. Don't check I/O chan anymore */
3516
3517     return iochan_is_alive(assoc->client_chan);
3518 }
3519
3520
3521 /*
3522  * Local variables:
3523  * c-basic-offset: 4
3524  * indent-tabs-mode: nil
3525  * End:
3526  * vim: shiftwidth=4 tabstop=8 expandtab
3527  */
3528