src/seshigh.c

   1 /*
   2  * Copyright (C) 1995-2006, Index Data ApS
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: seshigh.c,v 1.105 2006-12-04 14:56:55 adam Exp $
   6  */
   7 /**
   8  * \file seshigh.c
   9  * \brief Implements GFS session logic.
  10  *
  11  * Frontend server logic.
  12  *
  13  * This code receives incoming APDUs, and handles client requests by means
  14  * of the backend API.
  15  *
  16  * Some of the code is getting quite involved, compared to simpler servers -
  17  * primarily because it is asynchronous both in the communication with
  18  * the user and the backend. We think the complexity will pay off in
  19  * the form of greater flexibility when more asynchronous facilities
  20  * are implemented.
  21  *
  22  * Memory management has become somewhat involved. In the simple case, where
  23  * only one PDU is pending at a time, it will simply reuse the same memory,
  24  * once it has found its working size. When we enable multiple concurrent
  25  * operations, perhaps even with multiple parallel calls to the backend, it
  26  * will maintain a pool of buffers for encoding and decoding, trying to
  27  * minimize memory allocation/deallocation during normal operation.
  28  *
  29  */
  30
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <assert.h>
  34 #include <ctype.h>
  35
  36 #if HAVE_SYS_TYPES_H
  37 #include <sys/types.h>
  38 #endif
  39 #if HAVE_SYS_STAT_H
  40 #include <sys/stat.h>
  41 #endif
  42
  43 #ifdef WIN32
  44 #include <io.h>
  45 #define S_ISREG(x) (x & _S_IFREG)
  46 #include <process.h>
  47 #endif
  48
  49 #if HAVE_UNISTD_H
  50 #include <unistd.h>
  51 #endif
  52
  53 #if YAZ_HAVE_XML2
  54 #include <libxml/parser.h>
  55 #include <libxml/tree.h>
  56 #endif
  57
  58 #include <yaz/yconfig.h>
  59 #include <yaz/xmalloc.h>
  60 #include <yaz/comstack.h>
  61 #include "eventl.h"
  62 #include "session.h"
  63 #include "mime.h"
  64 #include <yaz/proto.h>
  65 #include <yaz/oid.h>
  66 #include <yaz/log.h>
  67 #include <yaz/logrpn.h>
  68 #include <yaz/querytowrbuf.h>
  69 #include <yaz/statserv.h>
  70 #include <yaz/diagbib1.h>
  71 #include <yaz/charneg.h>
  72 #include <yaz/otherinfo.h>
  73 #include <yaz/yaz-util.h>
  74 #include <yaz/pquery.h>
  75
  76 #include <yaz/srw.h>
  77 #include <yaz/backend.h>
  78
  79 static void process_gdu_request(association *assoc, request *req);
  80 static int process_z_request(association *assoc, request *req, char **msg);
  81 void backend_response(IOCHAN i, int event);
  82 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  83 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  84 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  85 static Z_External *init_diagnostics(ODR odr, int errcode,
  86                                     const char *errstring);
  87 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
  88     int *fd);
  89 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  90     bend_search_rr *bsrr, int *fd);
  91 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
  92     int *fd);
  93 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
  94 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
  95 static void process_close(association *assoc, request *reqb);
  96 void save_referenceId (request *reqb, Z_ReferenceId *refid);
  97 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
  98     int *fd);
  99 static Z_APDU *process_segmentRequest (association *assoc, request *reqb);
 100
 101 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
 102
 103 /* dynamic logging levels */
 104 static int logbits_set = 0;
 105 static int log_session = 0; /* one-line logs for session */
 106 static int log_sessiondetail = 0; /* more detailed stuff */
 107 static int log_request = 0; /* one-line logs for requests */
 108 static int log_requestdetail = 0;  /* more detailed stuff */
 109
 110 /** get_logbits sets global loglevel bits */
 111 static void get_logbits(void)
 112 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 113     if (!logbits_set)
 114     {
 115         logbits_set = 1;
 116         log_session = yaz_log_module_level("session");
 117         log_sessiondetail = yaz_log_module_level("sessiondetail");
 118         log_request = yaz_log_module_level("request");
 119         log_requestdetail = yaz_log_module_level("requestdetail");
 120     }
 121 }
 122
 123
 124
 125 static void wr_diag(WRBUF w, int error, const char *addinfo)
 126 {
 127     wrbuf_printf(w, "ERROR %d+", error);
 128     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
 129     if (addinfo){
 130         wrbuf_puts(w, "+");
 131         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
 132     }
 133
 134     wrbuf_puts(w, " ");
 135 }
 136
 137
 138 /*
 139  * Create and initialize a new association-handle.
 140  *  channel  : iochannel for the current line.
 141  *  link     : communications channel.
 142  * Returns: 0 or a new association handle.
 143  */
 144 association *create_association(IOCHAN channel, COMSTACK link,
 145                                 const char *apdufile)
 146 {
 147     association *anew;
 148
 149     if (!logbits_set)
 150         get_logbits();
 151     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 152         return 0;
 153     anew->init = 0;
 154     anew->version = 0;
 155     anew->last_control = 0;
 156     anew->client_chan = channel;
 157     anew->client_link = link;
 158     anew->cs_get_mask = 0;
 159     anew->cs_put_mask = 0;
 160     anew->cs_accept_mask = 0;
 161     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 162         !(anew->encode = odr_createmem(ODR_ENCODE)))
 163         return 0;
 164     if (apdufile && *apdufile)
 165     {
 166         FILE *f;
 167
 168         if (!(anew->print = odr_createmem(ODR_PRINT)))
 169             return 0;
 170         if (*apdufile == '@')
 171         {
 172             odr_setprint(anew->print, yaz_log_file());
 173         }
 174         else if (*apdufile != '-')
 175         {
 176             char filename[256];
 177             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 178             if (!(f = fopen(filename, "w")))
 179             {
 180                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 181                 return 0;
 182             }
 183             setvbuf(f, 0, _IONBF, 0);
 184             odr_setprint(anew->print, f);
 185         }
 186     }
 187     else
 188         anew->print = 0;
 189     anew->input_buffer = 0;
 190     anew->input_buffer_len = 0;
 191     anew->backend = 0;
 192     anew->state = ASSOC_NEW;
 193     request_initq(&anew->incoming);
 194     request_initq(&anew->outgoing);
 195     anew->proto = cs_getproto(link);
 196     anew->server = 0;
 197     return anew;
 198 }
 199
 200 /*
 201  * Free association and release resources.
 202  */
 203 void destroy_association(association *h)
 204 {
 205     statserv_options_block *cb = statserv_getcontrol();
 206     request *req;
 207
 208     xfree(h->init);
 209     odr_destroy(h->decode);
 210     odr_destroy(h->encode);
 211     if (h->print)
 212         odr_destroy(h->print);
 213     if (h->input_buffer)
 214     xfree(h->input_buffer);
 215     if (h->backend)
 216         (*cb->bend_close)(h->backend);
 217     while ((req = request_deq(&h->incoming)))
 218         request_release(req);
 219     while ((req = request_deq(&h->outgoing)))
 220         request_release(req);
 221     request_delq(&h->incoming);
 222     request_delq(&h->outgoing);
 223     xfree(h);
 224     xmalloc_trav("session closed");
 225     if (cb && cb->one_shot)
 226     {
 227         exit (0);
 228     }
 229 }
 230
 231 static void do_close_req(association *a, int reason, char *message,
 232                          request *req)
 233 {
 234     Z_APDU apdu;
 235     Z_Close *cls = zget_Close(a->encode);
 236
 237     /* Purge request queue */
 238     while (request_deq(&a->incoming));
 239     while (request_deq(&a->outgoing));
 240     if (a->version >= 3)
 241     {
 242         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 243             reason, message ? message : "none");
 244         apdu.which = Z_APDU_close;
 245         apdu.u.close = cls;
 246         *cls->closeReason = reason;
 247         cls->diagnosticInformation = message;
 248         process_z_response(a, req, &apdu);
 249         iochan_settimeout(a->client_chan, 20);
 250     }
 251     else
 252     {
 253         request_release(req);
 254         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 255         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 256         a->cs_put_mask = 0;
 257     }
 258     a->state = ASSOC_DEAD;
 259 }
 260
 261 static void do_close(association *a, int reason, char *message)
 262 {
 263     request *req = request_get(&a->outgoing);
 264     do_close_req (a, reason, message, req);
 265 }
 266
 267
 268 int ir_read(IOCHAN h, int event)
 269 {
 270     association *assoc = (association *)iochan_getdata(h);
 271     COMSTACK conn = assoc->client_link;
 272     request *req;
 273
 274     if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 275     {
 276         yaz_log(YLOG_DEBUG, "ir_session (input)");
 277         /* We aren't speaking to this fellow */
 278         if (assoc->state == ASSOC_DEAD)
 279         {
 280             yaz_log(log_sessiondetail, "Connection closed - end of session");
 281             cs_close(conn);
 282             destroy_association(assoc);
 283             iochan_destroy(h);
 284             return 0;
 285         }
 286         assoc->cs_get_mask = EVENT_INPUT;
 287
 288         do
 289         {
 290             int res = cs_get(conn, &assoc->input_buffer,
 291                              &assoc->input_buffer_len);
 292             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 293             {
 294                 yaz_log(log_session, "Connection error: %s res=%d",
 295                         cs_errmsg(cs_errno(conn)), res);
 296                 req = request_get(&assoc->incoming); /* get a new request */
 297                 do_close_req(assoc, Z_Close_protocolError,
 298                              "Incoming package too large", req);
 299                 return 0;
 300             }
 301             else if (res <= 0)
 302             {
 303                 yaz_log(log_session, "Connection closed by client");
 304                 assoc->state = ASSOC_DEAD;
 305                 return 0;
 306             }
 307             else if (res == 1) /* incomplete read - wait for more  */
 308             {
 309                 if (conn->io_pending & CS_WANT_WRITE)
 310                     assoc->cs_get_mask |= EVENT_OUTPUT;
 311                 iochan_setflag(h, assoc->cs_get_mask);
 312                 return 1;
 313             }
 314             /* we got a complete PDU. Let's decode it */
 315             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 316                     assoc->input_buffer[0] & 0xff,
 317                     assoc->input_buffer[1] & 0xff,
 318                     assoc->input_buffer[2] & 0xff);
 319             req = request_get(&assoc->incoming); /* get a new request */
 320             odr_reset(assoc->decode);
 321             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 322             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 323             {
 324                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 325                         "[near byte %ld] ",
 326                         odr_errmsg(odr_geterror(assoc->decode)),
 327                         odr_getelement(assoc->decode),
 328                         (long) odr_offset(assoc->decode));
 329                 if (assoc->decode->error != OHTTP)
 330                 {
 331                     yaz_log(YLOG_WARN, "PDU dump:");
 332                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 333                     request_release(req);
 334                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 335                 }
 336                 else
 337                 {
 338                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 339                     assoc->state = ASSOC_DEAD;
 340                     process_gdu_response(assoc, req, p);
 341                 }
 342                 return 0;
 343             }
 344             req->request_mem = odr_extract_mem(assoc->decode);
 345             if (assoc->print)
 346             {
 347                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 348                     yaz_log(YLOG_WARN, "ODR print error: %s",
 349                             odr_errmsg(odr_geterror(assoc->print)));
 350                 odr_reset(assoc->print);
 351             }
 352             request_enq(&assoc->incoming, req);
 353         }
 354         while (cs_more(conn));
 355     }
 356     return 1;
 357 }
 358
 359 /*
 360  * This is where PDUs from the client are read and the further
 361  * processing is initiated. Flow of control moves down through the
 362  * various process_* functions below, until the encoded result comes back up
 363  * to the output handler in here.
 364  *
 365  *  h     : the I/O channel that has an outstanding event.
 366  *  event : the current outstanding event.
 367  */
 368 void ir_session(IOCHAN h, int event)
 369 {
 370     int res;
 371     association *assoc = (association *)iochan_getdata(h);
 372     COMSTACK conn = assoc->client_link;
 373     request *req;
 374
 375     assert(h && conn && assoc);
 376     if (event == EVENT_TIMEOUT)
 377     {
 378         if (assoc->state != ASSOC_UP)
 379         {
 380             yaz_log(YLOG_DEBUG, "Final timeout - closing connection.");
 381             /* do we need to lod this at all */
 382             cs_close(conn);
 383             destroy_association(assoc);
 384             iochan_destroy(h);
 385         }
 386         else
 387         {
 388             yaz_log(log_sessiondetail,
 389                     "Session idle too long. Sending close.");
 390             do_close(assoc, Z_Close_lackOfActivity, 0);
 391         }
 392         return;
 393     }
 394     if (event & assoc->cs_accept_mask)
 395     {
 396         if (!cs_accept (conn))
 397         {
 398             yaz_log (YLOG_WARN, "accept failed");
 399             destroy_association(assoc);
 400             iochan_destroy(h);
 401         }
 402         iochan_clearflag (h, EVENT_OUTPUT);
 403         if (conn->io_pending)
 404         {   /* cs_accept didn't complete */
 405             assoc->cs_accept_mask =
 406                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 407                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 408
 409             iochan_setflag (h, assoc->cs_accept_mask);
 410         }
 411         else
 412         {   /* cs_accept completed. Prepare for reading (cs_get) */
 413             assoc->cs_accept_mask = 0;
 414             assoc->cs_get_mask = EVENT_INPUT;
 415             iochan_setflag (h, assoc->cs_get_mask);
 416         }
 417         return;
 418     }
 419     if (event & assoc->cs_get_mask) /* input */
 420     {
 421         if (!ir_read(h, event))
 422             return;
 423         req = request_head(&assoc->incoming);
 424         if (req->state == REQUEST_IDLE)
 425         {
 426             request_deq(&assoc->incoming);
 427             process_gdu_request(assoc, req);
 428         }
 429     }
 430     if (event & assoc->cs_put_mask)
 431     {
 432         request *req = request_head(&assoc->outgoing);
 433
 434         assoc->cs_put_mask = 0;
 435         yaz_log(YLOG_DEBUG, "ir_session (output)");
 436         req->state = REQUEST_PENDING;
 437         switch (res = cs_put(conn, req->response, req->len_response))
 438         {
 439         case -1:
 440             yaz_log(log_sessiondetail, "Connection closed by client");
 441             cs_close(conn);
 442             destroy_association(assoc);
 443             iochan_destroy(h);
 444             break;
 445         case 0: /* all sent - release the request structure */
 446             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 447 #if 0
 448             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 449                     req->response);
 450 #endif
 451             nmem_destroy(req->request_mem);
 452             request_deq(&assoc->outgoing);
 453             request_release(req);
 454             if (!request_head(&assoc->outgoing))
 455             {   /* restore mask for cs_get operation ... */
 456                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 457                 iochan_setflag(h, assoc->cs_get_mask);
 458                 if (assoc->state == ASSOC_DEAD)
 459                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 460             }
 461             else
 462             {
 463                 assoc->cs_put_mask = EVENT_OUTPUT;
 464             }
 465             break;
 466         default:
 467             if (conn->io_pending & CS_WANT_WRITE)
 468                 assoc->cs_put_mask |= EVENT_OUTPUT;
 469             if (conn->io_pending & CS_WANT_READ)
 470                 assoc->cs_put_mask |= EVENT_INPUT;
 471             iochan_setflag(h, assoc->cs_put_mask);
 472         }
 473     }
 474     if (event & EVENT_EXCEPT)
 475     {
 476         yaz_log(YLOG_WARN, "ir_session (exception)");
 477         cs_close(conn);
 478         destroy_association(assoc);
 479         iochan_destroy(h);
 480     }
 481 }
 482
 483 static int process_z_request(association *assoc, request *req, char **msg);
 484
 485
 486 static void assoc_init_reset(association *assoc)
 487 {
 488     xfree (assoc->init);
 489     assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init));
 490
 491     assoc->init->stream = assoc->encode;
 492     assoc->init->print = assoc->print;
 493     assoc->init->auth = 0;
 494     assoc->init->referenceId = 0;
 495     assoc->init->implementation_version = 0;
 496     assoc->init->implementation_id = 0;
 497     assoc->init->implementation_name = 0;
 498     assoc->init->bend_sort = NULL;
 499     assoc->init->bend_search = NULL;
 500     assoc->init->bend_present = NULL;
 501     assoc->init->bend_esrequest = NULL;
 502     assoc->init->bend_delete = NULL;
 503     assoc->init->bend_scan = NULL;
 504     assoc->init->bend_segment = NULL;
 505     assoc->init->bend_fetch = NULL;
 506     assoc->init->bend_explain = NULL;
 507     assoc->init->bend_srw_scan = NULL;
 508     assoc->init->bend_srw_update = NULL;
 509
 510     assoc->init->charneg_request = NULL;
 511     assoc->init->charneg_response = NULL;
 512
 513     assoc->init->decode = assoc->decode;
 514     assoc->init->peer_name =
 515         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
 516
 517     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 518 }
 519
 520 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 521 {
 522     statserv_options_block *cb = statserv_getcontrol();
 523     if (!assoc->init)
 524     {
 525         const char *encoding = "UTF-8";
 526         Z_External *ce;
 527         bend_initresult *binitres;
 528
 529         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 530         assoc_init_reset(assoc);
 531
 532         if (sr->username)
 533         {
 534             Z_IdAuthentication *auth = odr_malloc(assoc->decode, sizeof(*auth));
 535             int len;
 536
 537             len = strlen(sr->username) + 1;
 538             if (sr->password)
 539                 len += strlen(sr->password) + 2;
 540             auth->which = Z_IdAuthentication_open;
 541             auth->u.open = odr_malloc(assoc->decode, len);
 542             strcpy(auth->u.open, sr->username);
 543             if (sr->password && *sr->password)
 544             {
 545                 strcat(auth->u.open, "/");
 546                 strcat(auth->u.open, sr->password);
 547             }
 548             assoc->init->auth = auth;
 549         }
 550
 551 #if 1
 552         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 553         assoc->init->charneg_request = ce->u.charNeg3;
 554 #endif
 555         assoc->backend = 0;
 556         if (!(binitres = (*cb->bend_init)(assoc->init)))
 557         {
 558             assoc->state = ASSOC_DEAD;
 559             yaz_add_srw_diagnostic(assoc->encode, d, num,
 560                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 561             return 0;
 562         }
 563         assoc->backend = binitres->handle;
 564         assoc->init->auth = 0;
 565         if (binitres->errcode)
 566         {
 567             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 568             assoc->state = ASSOC_DEAD;
 569             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 570                                    binitres->errstring);
 571             return 0;
 572         }
 573         return 1;
 574     }
 575     return 1;
 576 }
 577
 578 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 579 {
 580 #if YAZ_HAVE_XML2
 581     yaz_record_conv_t rc = 0;
 582     const char *match_schema = 0;
 583     int *match_syntax = 0;
 584
 585     if (assoc->server)
 586     {
 587         int r;
 588         const char *input_schema = yaz_get_esn(rr->comp);
 589         Odr_oid *input_syntax_raw = rr->request_format_raw;
 590
 591         const char *backend_schema = 0;
 592         Odr_oid *backend_syntax = 0;
 593
 594         r = yaz_retrieval_request(assoc->server->retrieval,
 595                                   input_schema,
 596                                   input_syntax_raw,
 597                                   &match_schema,
 598                                   &match_syntax,
 599                                   &rc,
 600                                   &backend_schema,
 601                                   &backend_syntax);
 602         if (r == -1) /* error ? */
 603         {
 604             const char *details = yaz_retrieval_get_error(
 605                 assoc->server->retrieval);
 606
 607             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 608             if (details)
 609                 rr->errstring = odr_strdup(rr->stream, details);
 610             return -1;
 611         }
 612         else if (r == 1 || r == 3)
 613         {
 614             const char *details = input_schema;
 615             rr->errcode =  YAZ_BIB1_ELEMENT_SET_NAMES_UNSUPP;
 616             if (details)
 617                 rr->errstring = odr_strdup(rr->stream, details);
 618             return -1;
 619         }
 620         else if (r == 2)
 621         {
 622             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 623             if (input_syntax_raw)
 624             {
 625                 char oidbuf[OID_STR_MAX];
 626                 oid_to_dotstring(input_syntax_raw, oidbuf);
 627                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 628             }
 629             return -1;
 630         }
 631         if (backend_schema)
 632         {
 633             yaz_set_esn(&rr->comp, backend_schema, rr->stream->mem);
 634         }
 635         if (backend_syntax)
 636         {
 637             oident *oident_syntax = oid_getentbyoid(backend_syntax);
 638
 639             rr->request_format_raw = backend_syntax;
 640
 641             if (oident_syntax)
 642                 rr->request_format = oident_syntax->value;
 643             else
 644                 rr->request_format = VAL_NONE;
 645         }
 646     }
 647     (*assoc->init->bend_fetch)(assoc->backend, rr);
 648     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
 649     {   /* post conversion must take place .. */
 650         WRBUF output_record = wrbuf_alloc();
 651         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 652         if (r)
 653         {
 654             const char *details = yaz_record_conv_get_error(rc);
 655             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 656             if (details)
 657                 rr->errstring = odr_strdup(rr->stream, details);
 658         }
 659         else
 660         {
 661             rr->len = wrbuf_len(output_record);
 662             rr->record = odr_malloc(rr->stream, rr->len);
 663             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 664         }
 665         wrbuf_free(output_record, 1);
 666     }
 667     if (match_syntax)
 668     {
 669         struct oident *oi = oid_getentbyoid(match_syntax);
 670         rr->output_format = oi ? oi->value : VAL_NONE;
 671         rr->output_format_raw = match_syntax;
 672     }
 673     if (match_schema)
 674         rr->schema = odr_strdup(rr->stream, match_schema);
 675     return 0;
 676 #else
 677     (*assoc->init->bend_fetch)(assoc->backend, rr);
 678 #endif
 679 }
 680
 681 static int srw_bend_fetch(association *assoc, int pos,
 682                           Z_SRW_searchRetrieveRequest *srw_req,
 683                           Z_SRW_record *record,
 684                           const char **addinfo)
 685 {
 686     bend_fetch_rr rr;
 687     ODR o = assoc->encode;
 688
 689     rr.setname = "default";
 690     rr.number = pos;
 691     rr.referenceId = 0;
 692     rr.request_format = VAL_TEXT_XML;
 693     rr.request_format_raw = yaz_oidval_to_z3950oid(assoc->decode,
 694                                                    CLASS_RECSYN,
 695                                                    VAL_TEXT_XML);
 696     rr.comp = (Z_RecordComposition *)
 697             odr_malloc(assoc->decode, sizeof(*rr.comp));
 698     rr.comp->which = Z_RecordComp_complex;
 699     rr.comp->u.complex = (Z_CompSpec *)
 700             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 701     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 702         odr_malloc(assoc->encode, sizeof(bool_t));
 703     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 704     rr.comp->u.complex->num_dbSpecific = 0;
 705     rr.comp->u.complex->dbSpecific = 0;
 706     rr.comp->u.complex->num_recordSyntax = 0;
 707     rr.comp->u.complex->recordSyntax = 0;
 708
 709     rr.comp->u.complex->generic = (Z_Specification *)
 710             odr_malloc(assoc->decode, sizeof(Z_Specification));
 711
 712     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 713     rr.comp->u.complex->generic->which = Z_Schema_uri;
 714     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 715
 716     /* ESN = recordSchema if recordSchema is present */
 717     rr.comp->u.complex->generic->elementSpec = 0;
 718     if (srw_req->recordSchema)
 719     {
 720         rr.comp->u.complex->generic->elementSpec =
 721             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 722         rr.comp->u.complex->generic->elementSpec->which =
 723             Z_ElementSpec_elementSetName;
 724         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 725             srw_req->recordSchema;
 726     }
 727
 728     rr.stream = assoc->encode;
 729     rr.print = assoc->print;
 730
 731     rr.basename = 0;
 732     rr.len = 0;
 733     rr.record = 0;
 734     rr.last_in_set = 0;
 735     rr.errcode = 0;
 736     rr.errstring = 0;
 737     rr.surrogate_flag = 0;
 738     rr.schema = srw_req->recordSchema;
 739
 740     if (!assoc->init->bend_fetch)
 741         return 1;
 742
 743     retrieve_fetch(assoc, &rr);
 744
 745     if (rr.errcode && rr.surrogate_flag)
 746     {
 747         int code = yaz_diag_bib1_to_srw(rr.errcode);
 748         const char *message = yaz_diag_srw_str(code);
 749         int len = 200;
 750         if (message)
 751             len += strlen(message);
 752         if (rr.errstring)
 753             len += strlen(rr.errstring);
 754
 755         record->recordData_buf = odr_malloc(o, len);
 756
 757         sprintf(record->recordData_buf, "<diagnostic "
 758                 "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
 759                 " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
 760         if (rr.errstring)
 761             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 762                     " <details>%s</details>\n", rr.errstring);
 763         if (message)
 764             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 765                     " <message>%s</message>\n", message);
 766         sprintf(record->recordData_buf + strlen(record->recordData_buf),
 767                 "</diagnostic>\n");
 768         record->recordData_len = strlen(record->recordData_buf);
 769         record->recordPosition = odr_intdup(o, pos);
 770         record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
 771         return 0;
 772     }
 773     else if (rr.len >= 0)
 774     {
 775         record->recordData_buf = rr.record;
 776         record->recordData_len = rr.len;
 777         record->recordPosition = odr_intdup(o, pos);
 778         if (rr.schema)
 779             record->recordSchema = odr_strdup(o, rr.schema);
 780         else
 781             record->recordSchema = 0;
 782     }
 783     if (rr.errcode)
 784     {
 785         *addinfo = rr.errstring;
 786         return rr.errcode;
 787     }
 788     return 0;
 789 }
 790
 791 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 792                    Z_Query *query_result)
 793 {
 794     /* have a CQL query and  CQL to PQF transform .. */
 795     CQL_parser cp = cql_parser_create();
 796     int r;
 797     int srw_errcode = 0;
 798     const char *add = 0;
 799     char rpn_buf[5120];
 800
 801     r = cql_parser_string(cp, cql);
 802     if (r)
 803     {
 804         /* CQL syntax error */
 805         srw_errcode = 10;
 806     }
 807     if (!r)
 808     {
 809         /* Syntax OK */
 810         r = cql_transform_buf(ct,
 811                               cql_parser_result(cp),
 812                               rpn_buf, sizeof(rpn_buf)-1);
 813         if (r)
 814             srw_errcode  = cql_transform_error(ct, &add);
 815     }
 816     if (!r)
 817     {
 818         /* Syntax & transform OK. */
 819         /* Convert PQF string to Z39.50 to RPN query struct */
 820         YAZ_PQF_Parser pp = yaz_pqf_create();
 821         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 822         if (!rpnquery)
 823         {
 824             size_t off;
 825             const char *pqf_msg;
 826             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 827             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 828                     pqf_msg, code);
 829             srw_errcode = 10;
 830         }
 831         else
 832         {
 833             query_result->which = Z_Query_type_1;
 834             query_result->u.type_1 = rpnquery;
 835         }
 836         yaz_pqf_destroy(pp);
 837     }
 838     cql_parser_destroy(cp);
 839     return srw_errcode;
 840 }
 841
 842 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 843                         Z_AttributesPlusTerm *result)
 844 {
 845     Z_Query query;
 846     Z_RPNQuery *rpn;
 847     int srw_error = cql2pqf(odr, cql, ct, &query);
 848     if (srw_error)
 849         return srw_error;
 850     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 851         return 10; /* bad query type */
 852     rpn = query.u.type_1;
 853     if (!rpn->RPNStructure)
 854         return 10; /* must be structure */
 855     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 856         return 10; /* must be simple */
 857     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 858         return 10; /* must be attributes plus term node .. */
 859     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 860            sizeof(*result));
 861     return 0;
 862 }
 863
 864 static void srw_bend_search(association *assoc, request *req,
 865                             Z_SRW_PDU *sr,
 866                             Z_SRW_searchRetrieveResponse *srw_res,
 867                             int *http_code)
 868 {
 869     int srw_error = 0;
 870     Z_External *ext;
 871     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 872
 873     *http_code = 200;
 874     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 875     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 876     if (srw_res->num_diagnostics == 0 && assoc->init)
 877     {
 878         bend_search_rr rr;
 879         rr.setname = "default";
 880         rr.replace_set = 1;
 881         rr.num_bases = 1;
 882         rr.basenames = &srw_req->database;
 883         rr.referenceId = 0;
 884         rr.srw_sortKeys = 0;
 885         rr.srw_setname = 0;
 886         rr.srw_setnameIdleTime = 0;
 887         rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 888         rr.query->u.type_1 = 0;
 889
 890         if (srw_req->query_type == Z_SRW_query_type_cql)
 891         {
 892             if (assoc->server && assoc->server->cql_transform)
 893             {
 894                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 895                                           assoc->server->cql_transform,
 896                                           rr.query);
 897                 if (srw_errcode)
 898                 {
 899                     yaz_add_srw_diagnostic(assoc->encode,
 900                                            &srw_res->diagnostics,
 901                                            &srw_res->num_diagnostics,
 902                                            srw_errcode, 0);
 903                 }
 904             }
 905             else
 906             {
 907                 /* CQL query to backend. Wrap it - Z39.50 style */
 908                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 909                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 910                                                         "1.2.840.10003.16.2");
 911                 ext->indirect_reference = 0;
 912                 ext->descriptor = 0;
 913                 ext->which = Z_External_CQL;
 914                 ext->u.cql = srw_req->query.cql;
 915
 916                 rr.query->which = Z_Query_type_104;
 917                 rr.query->u.type_104 =  ext;
 918             }
 919         }
 920         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 921         {
 922             Z_RPNQuery *RPNquery;
 923             YAZ_PQF_Parser pqf_parser;
 924
 925             pqf_parser = yaz_pqf_create ();
 926
 927             RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
 928                                       srw_req->query.pqf);
 929             if (!RPNquery)
 930             {
 931                 const char *pqf_msg;
 932                 size_t off;
 933                 int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
 934                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 935                         code, pqf_msg, (long) off);
 936                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 937             }
 938
 939             rr.query->which = Z_Query_type_1;
 940             rr.query->u.type_1 =  RPNquery;
 941
 942             yaz_pqf_destroy (pqf_parser);
 943         }
 944         else
 945         {
 946             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 947                                    &srw_res->num_diagnostics,
 948                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 949         }
 950         if (rr.query->u.type_1)
 951         {
 952             rr.stream = assoc->encode;
 953             rr.decode = assoc->decode;
 954             rr.print = assoc->print;
 955             rr.request = req;
 956             if ( srw_req->sort.sortKeys )
 957                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 958                                              srw_req->sort.sortKeys );
 959             rr.association = assoc;
 960             rr.fd = 0;
 961             rr.hits = 0;
 962             rr.errcode = 0;
 963             rr.errstring = 0;
 964             rr.search_info = 0;
 965             yaz_log_zquery_level(log_requestdetail,rr.query);
 966
 967             (assoc->init->bend_search)(assoc->backend, &rr);
 968             if (rr.errcode)
 969             {
 970                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 971                 {
 972                     *http_code = 404;
 973                 }
 974                 else
 975                 {
 976                     srw_error = yaz_diag_bib1_to_srw (rr.errcode);
 977                     yaz_add_srw_diagnostic(assoc->encode,
 978                                            &srw_res->diagnostics,
 979                                            &srw_res->num_diagnostics,
 980                                            srw_error, rr.errstring);
 981                 }
 982             }
 983             else
 984             {
 985                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
 986                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
 987
 988                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
 989                         start, number, rr.hits);
 990
 991                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 992                 if (rr.srw_setname)
 993                 {
 994                     srw_res->resultSetId =
 995                         odr_strdup(assoc->encode, rr.srw_setname );
 996                     srw_res->resultSetIdleTime =
 997                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
 998                 }
 999
1000                 if ((rr.hits > 0 && start > rr.hits) || start < 1)
1001                 {
1002                     yaz_add_srw_diagnostic(
1003                         assoc->encode,
1004                         &srw_res->diagnostics, &srw_res->num_diagnostics,
1005                         YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1006                 }
1007                 else if (number > 0)
1008                 {
1009                     int i;
1010                     int ok = 1;
1011                     if (start + number > rr.hits)
1012                         number = rr.hits - start + 1;
1013
1014                     /* Call bend_present if defined */
1015                     if (assoc->init->bend_present)
1016                     {
1017                         bend_present_rr *bprr = (bend_present_rr*)
1018                             odr_malloc (assoc->decode, sizeof(*bprr));
1019                         bprr->setname = "default";
1020                         bprr->start = start;
1021                         bprr->number = number;
1022                         bprr->format = VAL_TEXT_XML;
1023                         if (srw_req->recordSchema)
1024                         {
1025                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1026                                                                             sizeof(*bprr->comp));
1027                             bprr->comp->which = Z_RecordComp_simple;
1028                             bprr->comp->u.simple = (Z_ElementSetNames *)
1029                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1030                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1031                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1032                         }
1033                         else
1034                         {
1035                             bprr->comp = 0;
1036                         }
1037                         bprr->stream = assoc->encode;
1038                         bprr->referenceId = 0;
1039                         bprr->print = assoc->print;
1040                         bprr->request = req;
1041                         bprr->association = assoc;
1042                         bprr->errcode = 0;
1043                         bprr->errstring = NULL;
1044                         (*assoc->init->bend_present)(assoc->backend, bprr);
1045
1046                         if (!bprr->request)
1047                             return;
1048                         if (bprr->errcode)
1049                         {
1050                             srw_error = yaz_diag_bib1_to_srw (bprr->errcode);
1051                             yaz_add_srw_diagnostic(assoc->encode,
1052                                                    &srw_res->diagnostics,
1053                                                    &srw_res->num_diagnostics,
1054                                                    srw_error, bprr->errstring);
1055                             ok = 0;
1056                         }
1057                     }
1058
1059                     if (ok)
1060                     {
1061                         int j = 0;
1062                         int packing = Z_SRW_recordPacking_string;
1063                         if (srw_req->recordPacking){
1064                             if (!strcmp(srw_req->recordPacking, "xml"))
1065                                 packing = Z_SRW_recordPacking_XML;
1066                             if (!strcmp(srw_req->recordPacking, "url"))
1067                                 packing = Z_SRW_recordPacking_URL;
1068                         }
1069                         srw_res->records = (Z_SRW_record *)
1070                             odr_malloc(assoc->encode,
1071                                        number * sizeof(*srw_res->records));
1072
1073                         srw_res->extra_records = (Z_SRW_extra_record **)
1074                             odr_malloc(assoc->encode,
1075                                        number*sizeof(*srw_res->extra_records));
1076
1077                         for (i = 0; i<number; i++)
1078                         {
1079                             int errcode;
1080                             const char *addinfo = 0;
1081
1082                             srw_res->records[j].recordPacking = packing;
1083                             srw_res->records[j].recordData_buf = 0;
1084                             srw_res->extra_records[j] = 0;
1085                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1086                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1087                                                      srw_res->records + j,
1088                                                      &addinfo);
1089                             if (errcode)
1090                             {
1091                                 yaz_add_srw_diagnostic(assoc->encode,
1092                                                        &srw_res->diagnostics,
1093                                                        &srw_res->num_diagnostics,
1094                                                        yaz_diag_bib1_to_srw (errcode),
1095                                                        addinfo);
1096
1097                                 break;
1098                             }
1099                             if (srw_res->records[j].recordData_buf)
1100                                 j++;
1101                         }
1102                         srw_res->num_records = j;
1103                         if (!j)
1104                             srw_res->records = 0;
1105                     }
1106                 }
1107             }
1108         }
1109     }
1110     if (log_request)
1111     {
1112         const char *querystr = "?";
1113         const char *querytype = "?";
1114         WRBUF wr = wrbuf_alloc();
1115
1116         switch (srw_req->query_type)
1117         {
1118         case Z_SRW_query_type_cql:
1119             querytype = "CQL";
1120             querystr = srw_req->query.cql;
1121             break;
1122         case Z_SRW_query_type_pqf:
1123             querytype = "PQF";
1124             querystr = srw_req->query.pqf;
1125             break;
1126         }
1127         wrbuf_printf(wr, "SRWSearch ");
1128         wrbuf_printf(wr, srw_req->database);
1129         wrbuf_printf(wr, " ");
1130         if (srw_res->num_diagnostics)
1131             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1132         else if (*http_code != 200)
1133             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1134         else if (srw_res->numberOfRecords)
1135         {
1136             wrbuf_printf(wr, "OK %d",
1137                          (srw_res->numberOfRecords ?
1138                           *srw_res->numberOfRecords : 0));
1139         }
1140         wrbuf_printf(wr, " %s %d+%d",
1141                      (srw_res->resultSetId ?
1142                       srw_res->resultSetId : "-"),
1143                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1144                      srw_res->num_records);
1145         yaz_log(log_request, "%s %s: %s", wrbuf_buf(wr), querytype, querystr);
1146         wrbuf_free(wr, 1);
1147     }
1148 }
1149
1150 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1151 {
1152 #if YAZ_HAVE_XML2
1153     xmlNodePtr ptr = rr->server_node_ptr;
1154     if (!ptr)
1155         return 0;
1156     for (ptr = ptr->children; ptr; ptr = ptr->next)
1157     {
1158         if (ptr->type != XML_ELEMENT_NODE)
1159             continue;
1160         if (!strcmp((const char *) ptr->name, "explain"))
1161         {
1162             int len;
1163             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1164             xmlChar *buf_out;
1165             char *content;
1166
1167             ptr = xmlCopyNode(ptr, 1);
1168
1169             xmlDocSetRootElement(doc, ptr);
1170
1171             xmlDocDumpMemory(doc, &buf_out, &len);
1172             content = (char*) odr_malloc(rr->stream, 1+len);
1173             memcpy(content, buf_out, len);
1174             content[len] = '\0';
1175
1176             xmlFree(buf_out);
1177             xmlFreeDoc(doc);
1178             rr->explain_buf = content;
1179             return 0;
1180         }
1181     }
1182 #endif
1183     return 0;
1184 }
1185
1186 static void srw_bend_explain(association *assoc, request *req,
1187                              Z_SRW_PDU *sr,
1188                              Z_SRW_explainResponse *srw_res,
1189                              int *http_code)
1190 {
1191     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1192     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1193     *http_code = 404;
1194     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1195     if (assoc->init)
1196     {
1197         bend_explain_rr rr;
1198
1199         rr.stream = assoc->encode;
1200         rr.decode = assoc->decode;
1201         rr.print = assoc->print;
1202         rr.explain_buf = 0;
1203         rr.database = srw_req->database;
1204         if (assoc->server)
1205             rr.server_node_ptr = assoc->server->server_node_ptr;
1206         else
1207             rr.server_node_ptr = 0;
1208         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1209         if (assoc->init->bend_explain)
1210             (*assoc->init->bend_explain)(assoc->backend, &rr);
1211         else
1212             srw_bend_explain_default(assoc->backend, &rr);
1213
1214         if (rr.explain_buf)
1215         {
1216             int packing = Z_SRW_recordPacking_string;
1217             if (srw_req->recordPacking)
1218             {
1219                 if (!strcmp(srw_req->recordPacking, "xml"))
1220                     packing = Z_SRW_recordPacking_XML;
1221                 else if (!strcmp(srw_req->recordPacking, "url"))
1222                     packing = Z_SRW_recordPacking_URL;
1223             }
1224             srw_res->record.recordSchema = rr.schema;
1225             srw_res->record.recordPacking = packing;
1226             srw_res->record.recordData_buf = rr.explain_buf;
1227             srw_res->record.recordData_len = strlen(rr.explain_buf);
1228             srw_res->record.recordPosition = 0;
1229             *http_code = 200;
1230         }
1231     }
1232 }
1233
1234 static void srw_bend_scan(association *assoc, request *req,
1235                           Z_SRW_PDU *sr,
1236                           Z_SRW_scanResponse *srw_res,
1237                           int *http_code)
1238 {
1239     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1240     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1241
1242     *http_code = 200;
1243     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1244     if (srw_res->num_diagnostics == 0 && assoc->init)
1245     {
1246         struct scan_entry *save_entries;
1247
1248         bend_scan_rr *bsrr = (bend_scan_rr *)
1249             odr_malloc (assoc->encode, sizeof(*bsrr));
1250         bsrr->num_bases = 1;
1251         bsrr->basenames = &srw_req->database;
1252
1253         bsrr->num_entries = srw_req->maximumTerms ?
1254             *srw_req->maximumTerms : 10;
1255         bsrr->term_position = srw_req->responsePosition ?
1256             *srw_req->responsePosition : 1;
1257
1258         bsrr->errcode = 0;
1259         bsrr->errstring = 0;
1260         bsrr->referenceId = 0;
1261         bsrr->stream = assoc->encode;
1262         bsrr->print = assoc->print;
1263         bsrr->step_size = odr_intdup(assoc->decode, 0);
1264         bsrr->entries = 0;
1265
1266         if (bsrr->num_entries > 0)
1267         {
1268             int i;
1269             bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1270                                        bsrr->num_entries);
1271             for (i = 0; i<bsrr->num_entries; i++)
1272             {
1273                 bsrr->entries[i].term = 0;
1274                 bsrr->entries[i].occurrences = 0;
1275                 bsrr->entries[i].errcode = 0;
1276                 bsrr->entries[i].errstring = 0;
1277                 bsrr->entries[i].display_term = 0;
1278             }
1279         }
1280         save_entries = bsrr->entries;  /* save it so we can compare later */
1281
1282         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1283             assoc->init->bend_scan)
1284         {
1285             Odr_oid *scan_attributeSet = 0;
1286             oident *attset;
1287             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1288
1289             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1290                                       &scan_attributeSet,
1291                                       srw_req->scanClause.pqf);
1292             if (scan_attributeSet &&
1293                 (attset = oid_getentbyoid(scan_attributeSet)) &&
1294                 (attset->oclass == CLASS_ATTSET ||
1295                  attset->oclass == CLASS_GENERAL))
1296                 bsrr->attributeset = attset->value;
1297             else
1298                 bsrr->attributeset = VAL_NONE;
1299             yaz_pqf_destroy(pqf_parser);
1300             bsrr->scanClause = 0;
1301             ((int (*)(void *, bend_scan_rr *))
1302              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1303         }
1304         else if (srw_req->query_type == Z_SRW_query_type_cql
1305                  && assoc->init->bend_scan && assoc->server
1306                  && assoc->server->cql_transform)
1307         {
1308             int srw_error;
1309             bsrr->scanClause = 0;
1310             bsrr->attributeset = VAL_NONE;
1311             bsrr->term = odr_malloc(assoc->decode, sizeof(*bsrr->term));
1312             srw_error = cql2pqf_scan(assoc->encode,
1313                                      srw_req->scanClause.cql,
1314                                      assoc->server->cql_transform,
1315                                      bsrr->term);
1316             if (srw_error)
1317                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1318                                        &srw_res->num_diagnostics,
1319                                        srw_error, 0);
1320             else
1321             {
1322                 ((int (*)(void *, bend_scan_rr *))
1323                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1324             }
1325         }
1326         else if (srw_req->query_type == Z_SRW_query_type_cql
1327                  && assoc->init->bend_srw_scan)
1328         {
1329             bsrr->term = 0;
1330             bsrr->attributeset = VAL_NONE;
1331             bsrr->scanClause = srw_req->scanClause.cql;
1332             ((int (*)(void *, bend_scan_rr *))
1333              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1334         }
1335         else
1336         {
1337             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1338                                    &srw_res->num_diagnostics,
1339                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1340         }
1341         if (bsrr->errcode)
1342         {
1343             int srw_error;
1344             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1345             {
1346                 *http_code = 404;
1347                 return;
1348             }
1349             srw_error = yaz_diag_bib1_to_srw (bsrr->errcode);
1350
1351             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1352                                    &srw_res->num_diagnostics,
1353                                    srw_error, bsrr->errstring);
1354         }
1355         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1356         {
1357             int i;
1358             srw_res->terms = (Z_SRW_scanTerm*)
1359                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1360                            bsrr->num_entries);
1361
1362             srw_res->num_terms =  bsrr->num_entries;
1363             for (i = 0; i<bsrr->num_entries; i++)
1364             {
1365                 Z_SRW_scanTerm *t = srw_res->terms + i;
1366                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1367                 t->numberOfRecords =
1368                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1369                 t->displayTerm = 0;
1370                 if (save_entries == bsrr->entries &&
1371                     bsrr->entries[i].display_term)
1372                 {
1373                     /* the entries was _not_ set by the handler. So it's
1374                        safe to test for new member display_term. It is
1375                        NULL'ed by us.
1376                     */
1377                     t->displayTerm = odr_strdup(assoc->encode,
1378                                                 bsrr->entries[i].display_term);
1379                 }
1380                 t->whereInList = 0;
1381             }
1382         }
1383     }
1384     if (log_request)
1385     {
1386         WRBUF wr = wrbuf_alloc();
1387         const char *querytype = 0;
1388         const char *querystr = 0;
1389
1390         switch(srw_req->query_type)
1391         {
1392         case Z_SRW_query_type_pqf:
1393             querytype = "PQF";
1394             querystr = srw_req->scanClause.pqf;
1395             break;
1396         case Z_SRW_query_type_cql:
1397             querytype = "CQL";
1398             querystr = srw_req->scanClause.cql;
1399             break;
1400         default:
1401             querytype = "UNKNOWN";
1402             querystr = "";
1403         }
1404
1405         wrbuf_printf(wr, "SRWScan ");
1406         wrbuf_printf(wr, srw_req->database);
1407         wrbuf_printf(wr, " ");
1408
1409         if (srw_res->num_diagnostics)
1410             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1411         else if (srw_res->num_terms)
1412             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1413         else
1414             wrbuf_printf(wr, "OK - - ");
1415
1416         wrbuf_printf(wr, "%d+%d+0 ",
1417                      (srw_req->responsePosition ?
1418                       *srw_req->responsePosition : 1),
1419                      (srw_req->maximumTerms ?
1420                       *srw_req->maximumTerms : 1));
1421         /* there is no step size in SRU/W ??? */
1422         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1423         yaz_log(log_request, "%s ", wrbuf_buf(wr) );
1424         wrbuf_free(wr, 1);
1425     }
1426
1427 }
1428
1429 static void srw_bend_update(association *assoc, request *req,
1430                             Z_SRW_PDU *sr,
1431                             Z_SRW_updateResponse *srw_res,
1432                             int *http_code)
1433 {
1434     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1435     yaz_log(YLOG_DEBUG, "Got SRW UpdateRequest");
1436     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1437     *http_code = 404;
1438     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1439     if (assoc->init)
1440     {
1441         bend_update_rr rr;
1442
1443         rr.stream = assoc->encode;
1444         rr.print = assoc->print;
1445         rr.num_bases = 1;
1446         rr.basenames = &srw_req->database;
1447         rr.operation = srw_req->operation;
1448         rr.operation_status = "failed";
1449         rr.record_id = 0;
1450         rr.record_version = 0;
1451         rr.record_checksum = 0;
1452         rr.record_old_version = 0;
1453         rr.record_packing = "xml";
1454         rr.record_schema = 0;
1455         rr.record_data = 0;
1456         rr.request_extra_record = 0;
1457         rr.response_extra_record = 0;
1458         rr.extra_request_data = 0;
1459         rr.extra_response_data = 0;
1460         rr.uri = 0;
1461         rr.message = 0;
1462         rr.details = 0;
1463
1464         if ( rr.operation == 0 ){
1465             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1466                                           &srw_res->num_diagnostics,
1467                                           9, "action" );
1468             return;
1469         }
1470         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1471         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1472         if ( !strcmp( rr.operation, "delete" ) ){
1473             if ( !srw_req->recordId ){
1474                 if ( srw_req->record.recordData_len ){
1475                     if ( srw_req->record.recordSchema == 0 ){
1476                         yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1477                                                       &srw_res->num_diagnostics,
1478                                                       9, "recordSchema" );
1479                     }
1480                     else {
1481                         rr.record_schema = odr_strdup(assoc->encode,
1482                                                       srw_req->record.recordSchema );
1483                     }
1484                     switch (srw_req->record.recordPacking)
1485                         {
1486                         case Z_SRW_recordPacking_string:
1487                             rr.record_packing = "string";
1488                             break;
1489                         case Z_SRW_recordPacking_XML:
1490                             rr.record_packing = "xml";
1491                             break;
1492                         case Z_SRW_recordPacking_URL:
1493                             rr.record_packing = "url";
1494                             break;
1495                         }
1496                     rr.record_data = odr_strdupn(assoc->encode,
1497                                                  srw_req->record.recordData_buf,
1498                                                  srw_req->record.recordData_len );
1499                     rr.request_extra_record = srw_req->extra_record;
1500                 }
1501                 else {
1502                     yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1503                                                   &srw_res->num_diagnostics,
1504                                                   9, "recordIdentifier OR recordData" );
1505                 }
1506             }
1507             else {
1508                 rr.record_id = srw_req->recordId;
1509                 if ( srw_req->record.recordData_len ){
1510                     yaz_add_sru_update_diagnostic(assoc->encode,
1511                                                   &srw_res->diagnostics,
1512                                                   &srw_res->num_diagnostics,
1513                                                   9, "recordData" );
1514                 }
1515             }
1516             if (  srw_req->recordVersion ){
1517                 rr.record_version = odr_strdup( assoc->encode,
1518                                                 srw_req->recordVersion );
1519
1520             }
1521             if ( srw_req->recordOldVersion ){
1522                 rr.record_old_version = odr_strdup(assoc->encode,
1523                                                    srw_req->recordOldVersion );
1524             }
1525             if ( srw_req->extraRequestData ){
1526                 rr.extra_request_data = odr_strdup(assoc->encode,
1527                                                    srw_req->extraRequestData );
1528             }
1529         }
1530         else if ( !strcmp( rr.operation, "replace" ) ){
1531             if ( !srw_req->recordId ){
1532                 yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1533                                               &srw_res->num_diagnostics,
1534                                               9, "recordIdentifier" );
1535             }
1536             else {
1537                 rr.record_id = srw_req->recordId;
1538             }
1539             if ( srw_req->record.recordSchema == 0 ){
1540                 yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1541                                               &srw_res->num_diagnostics,
1542                                               9, "recordSchema" );
1543             }
1544             else {
1545                 rr.record_schema = odr_strdup(assoc->encode,
1546                                               srw_req->record.recordSchema );
1547             }
1548             switch (srw_req->record.recordPacking)
1549             {
1550             case Z_SRW_recordPacking_string:
1551                 rr.record_packing = "string";
1552                 break;
1553             case Z_SRW_recordPacking_XML:
1554                 rr.record_packing = "xml";
1555                 break;
1556             case Z_SRW_recordPacking_URL:
1557                 rr.record_packing = "url";
1558                 break;
1559             }
1560             if ( srw_req->record.recordData_len ){
1561                 rr.record_data = odr_strdupn(assoc->encode,
1562                                              srw_req->record.recordData_buf,
1563                                              srw_req->record.recordData_len );
1564                 rr.request_extra_record = srw_req->extra_record;
1565             }
1566             else {
1567                 yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1568                                               &srw_res->num_diagnostics,
1569                                               9, "recordData" );
1570             }
1571             if (srw_req->extraRequestData)
1572                 rr.extra_request_data = odr_strdup(assoc->encode,
1573                                                    srw_req->extraRequestData );
1574         }
1575         else if (!strcmp( rr.operation, "insert" ) ) {
1576             rr.record_id = srw_req->recordId;
1577             if ( srw_req->record.recordSchema == 0 ){
1578                 yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1579                                               &srw_res->num_diagnostics,
1580                                               9, "recordSchema" );
1581             }
1582             else {
1583                 rr.record_schema = odr_strdup(assoc->encode,
1584                                               srw_req->record.recordSchema);
1585             }
1586             switch (srw_req->record.recordPacking)
1587             {
1588             case Z_SRW_recordPacking_string:
1589                 rr.record_packing = "string";
1590                 break;
1591             case Z_SRW_recordPacking_XML:
1592                 rr.record_packing = "xml";
1593                 break;
1594             case Z_SRW_recordPacking_URL:
1595                 rr.record_packing = "url";
1596                 break;
1597             }
1598
1599             if (srw_req->record.recordData_len)
1600             {
1601                 rr.record_data = odr_strdupn(assoc->encode,
1602                                              srw_req->record.recordData_buf,
1603                                              srw_req->record.recordData_len );
1604                 rr.request_extra_record = srw_req->extra_record;
1605             }
1606             else
1607                 yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1608                                              &srw_res->num_diagnostics,
1609                                              9, "recordData" );
1610             if ( srw_req->extraRequestData )
1611                 rr.extra_request_data = odr_strdup(assoc->encode,
1612                                                    srw_req->extraRequestData );
1613         }
1614         else {
1615             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1616                                           &srw_res->num_diagnostics,
1617                                           100, rr.operation );
1618         }
1619         if (srw_res->num_diagnostics == 0)
1620         {
1621             if ( assoc->init->bend_srw_update)
1622                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1623             else {
1624                 yaz_log( YLOG_WARN, "Got No Update function!");
1625                 return;
1626             }
1627         }
1628
1629         if (rr.uri)
1630             yaz_add_srw_diagnostic_uri(assoc->encode,
1631                                        &srw_res->diagnostics,
1632                                        &srw_res->num_diagnostics,
1633                                        rr.uri,
1634                                        rr.message,
1635                                        rr.details);
1636         srw_res->recordId = rr.record_id;
1637         srw_res->operationStatus = rr.operation_status;
1638         srw_res->recordVersion = rr.record_version;
1639         srw_res->recordChecksum = rr.record_checksum;
1640         srw_res->extraResponseData = rr.extra_response_data;
1641         srw_res->record.recordPosition = 0;
1642         if (srw_res->num_diagnostics == 0 && rr.record_data)
1643         {
1644             srw_res->record.recordSchema = rr.record_schema;
1645             srw_res->record.recordPacking = srw_req->record.recordPacking;
1646             srw_res->record.recordData_buf = rr.record_data;
1647             srw_res->record.recordData_len = strlen(rr.record_data);
1648             srw_res->extra_record = rr.response_extra_record;
1649
1650         }
1651         else
1652             srw_res->record.recordData_len = 0;
1653         *http_code = 200;
1654     }
1655 }
1656
1657 /* check if path is OK (1); BAD (0) */
1658 static int check_path(const char *path)
1659 {
1660     if (*path != '/')
1661         return 0;
1662     if (strstr(path, ".."))
1663         return 0;
1664     return 1;
1665 }
1666
1667 static char *read_file(const char *fname, ODR o, int *sz)
1668 {
1669     char *buf;
1670     FILE *inf = fopen(fname, "rb");
1671     if (!inf)
1672         return 0;
1673
1674     fseek(inf, 0L, SEEK_END);
1675     *sz = ftell(inf);
1676     rewind(inf);
1677     buf = odr_malloc(o, *sz);
1678     fread(buf, 1, *sz, inf);
1679     fclose(inf);
1680     return buf;
1681 }
1682
1683 static void process_http_request(association *assoc, request *req)
1684 {
1685     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1686     ODR o = assoc->encode;
1687     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1688     Z_SRW_PDU *sr = 0;
1689     Z_SOAP *soap_package = 0;
1690     Z_GDU *p = 0;
1691     char *charset = 0;
1692     Z_HTTP_Response *hres = 0;
1693     int keepalive = 1;
1694     const char *stylesheet = 0; /* for now .. set later */
1695     Z_SRW_diagnostic *diagnostic = 0;
1696     int num_diagnostic = 0;
1697     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1698
1699     if (!control_association(assoc, host, 0))
1700     {
1701         p = z_get_HTTP_Response(o, 404);
1702         r = 1;
1703     }
1704     if (r == 2 && assoc->server && assoc->server->docpath
1705         && hreq->path[0] == '/'
1706         &&
1707         /* check if path is a proper prefix of documentroot */
1708         strncmp(hreq->path+1, assoc->server->docpath,
1709                 strlen(assoc->server->docpath))
1710         == 0)
1711     {
1712         if (!check_path(hreq->path))
1713         {
1714             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1715             p = z_get_HTTP_Response(o, 404);
1716         }
1717         else
1718         {
1719             int content_size = 0;
1720             char *content_buf = read_file(hreq->path+1, o, &content_size);
1721             if (!content_buf)
1722             {
1723                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1724                 p = z_get_HTTP_Response(o, 404);
1725             }
1726             else
1727             {
1728                 const char *ctype = 0;
1729                 yaz_mime_types types = yaz_mime_types_create();
1730
1731                 yaz_mime_types_add(types, "xsl", "application/xml");
1732                 yaz_mime_types_add(types, "xml", "application/xml");
1733                 yaz_mime_types_add(types, "css", "text/css");
1734                 yaz_mime_types_add(types, "html", "text/html");
1735                 yaz_mime_types_add(types, "htm", "text/html");
1736                 yaz_mime_types_add(types, "txt", "text/plain");
1737                 yaz_mime_types_add(types, "js", "application/x-javascript");
1738
1739                 yaz_mime_types_add(types, "gif", "image/gif");
1740                 yaz_mime_types_add(types, "png", "image/png");
1741                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1742                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1743
1744                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1745                 if (!ctype)
1746                 {
1747                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1748                     p = z_get_HTTP_Response(o, 404);
1749                 }
1750                 else
1751                 {
1752                     p = z_get_HTTP_Response(o, 200);
1753                     hres = p->u.HTTP_Response;
1754                     hres->content_buf = content_buf;
1755                     hres->content_len = content_size;
1756                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1757                 }
1758                 yaz_mime_types_destroy(types);
1759             }
1760         }
1761         r = 1;
1762     }
1763
1764     if (r == 2)
1765     {
1766         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1767         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1768     }
1769     if (r == 2)  /* not taken */
1770     {
1771         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1772                            &diagnostic, &num_diagnostic);
1773         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1774     }
1775     if (r == 0)  /* decode SRW/SRU OK .. */
1776     {
1777         int http_code = 200;
1778         if (sr->which == Z_SRW_searchRetrieve_request)
1779         {
1780             Z_SRW_PDU *res =
1781                 yaz_srw_get(assoc->encode, Z_SRW_searchRetrieve_response);
1782
1783             stylesheet = sr->u.request->stylesheet;
1784             if (num_diagnostic)
1785             {
1786                 res->u.response->diagnostics = diagnostic;
1787                 res->u.response->num_diagnostics = num_diagnostic;
1788             }
1789             else
1790             {
1791                 srw_bend_search(assoc, req, sr, res->u.response,
1792                                 &http_code);
1793             }
1794             if (http_code == 200)
1795                 soap_package->u.generic->p = res;
1796         }
1797         else if (sr->which == Z_SRW_explain_request)
1798         {
1799             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
1800             stylesheet = sr->u.explain_request->stylesheet;
1801             if (num_diagnostic)
1802             {
1803                 res->u.explain_response->diagnostics = diagnostic;
1804                 res->u.explain_response->num_diagnostics = num_diagnostic;
1805             }
1806             srw_bend_explain(assoc, req, sr,
1807                              res->u.explain_response, &http_code);
1808             if (http_code == 200)
1809                 soap_package->u.generic->p = res;
1810         }
1811         else if (sr->which == Z_SRW_scan_request)
1812         {
1813             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_scan_response);
1814             stylesheet = sr->u.scan_request->stylesheet;
1815             if (num_diagnostic)
1816             {
1817                 res->u.scan_response->diagnostics = diagnostic;
1818                 res->u.scan_response->num_diagnostics = num_diagnostic;
1819             }
1820             srw_bend_scan(assoc, req, sr,
1821                           res->u.scan_response, &http_code);
1822             if (http_code == 200)
1823                 soap_package->u.generic->p = res;
1824         }
1825         else if (sr->which == Z_SRW_update_request)
1826         {
1827             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_update_response);
1828             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1829             if (num_diagnostic)
1830             {
1831                 res->u.update_response->diagnostics = diagnostic;
1832                 res->u.update_response->num_diagnostics = num_diagnostic;
1833             }
1834             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1835             srw_bend_update(assoc, req, sr,
1836                             res->u.update_response, &http_code);
1837             if (http_code == 200)
1838                 soap_package->u.generic->p = res;
1839         }
1840         else
1841         {
1842             yaz_log(log_request, "SOAP ERROR");
1843             /* FIXME - what error, what query */
1844             http_code = 500;
1845             z_soap_error(assoc->encode, soap_package,
1846                          "SOAP-ENV:Client", "Bad method", 0);
1847         }
1848         if (http_code == 200 || http_code == 500)
1849         {
1850             static Z_SOAP_Handler soap_handlers[4] = {
1851 #if YAZ_HAVE_XML2
1852                 {"http://www.loc.gov/zing/srw/", 0,
1853                  (Z_SOAP_fun) yaz_srw_codec},
1854                 {"http://www.loc.gov/zing/srw/v1.0/", 0,
1855                  (Z_SOAP_fun) yaz_srw_codec},
1856                 {"http://www.loc.gov/zing/srw/update/", 0,
1857                  (Z_SOAP_fun) yaz_ucp_codec},
1858 #endif
1859                 {0, 0, 0}
1860             };
1861             char ctype[60];
1862             int ret;
1863             p = z_get_HTTP_Response(o, 200);
1864             hres = p->u.HTTP_Response;
1865
1866             if (!stylesheet && assoc->server)
1867                 stylesheet = assoc->server->stylesheet;
1868
1869             /* empty stylesheet means NO stylesheet */
1870             if (stylesheet && *stylesheet == '\0')
1871                 stylesheet = 0;
1872
1873             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1874                                        &hres->content_buf, &hres->content_len,
1875                                        soap_handlers, charset, stylesheet);
1876             hres->code = http_code;
1877
1878             strcpy(ctype, "text/xml");
1879             if (charset)
1880             {
1881                 strcat(ctype, "; charset=");
1882                 strcat(ctype, charset);
1883             }
1884             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1885         }
1886         else
1887             p = z_get_HTTP_Response(o, http_code);
1888     }
1889
1890     if (p == 0)
1891         p = z_get_HTTP_Response(o, 500);
1892     hres = p->u.HTTP_Response;
1893     if (!strcmp(hreq->version, "1.0"))
1894     {
1895         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1896         if (v && !strcmp(v, "Keep-Alive"))
1897             keepalive = 1;
1898         else
1899             keepalive = 0;
1900         hres->version = "1.0";
1901     }
1902     else
1903     {
1904         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1905         if (v && !strcmp(v, "close"))
1906             keepalive = 0;
1907         else
1908             keepalive = 1;
1909         hres->version = "1.1";
1910     }
1911     if (!keepalive)
1912     {
1913         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1914         assoc->state = ASSOC_DEAD;
1915         assoc->cs_get_mask = 0;
1916     }
1917     else
1918     {
1919         int t;
1920         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1921
1922         if (alive && isdigit(*(const unsigned char *) alive))
1923             t = atoi(alive);
1924         else
1925             t = 15;
1926         if (t < 0 || t > 3600)
1927             t = 3600;
1928         iochan_settimeout(assoc->client_chan,t);
1929         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1930     }
1931     process_gdu_response(assoc, req, p);
1932 }
1933
1934 static void process_gdu_request(association *assoc, request *req)
1935 {
1936     if (req->gdu_request->which == Z_GDU_Z3950)
1937     {
1938         char *msg = 0;
1939         req->apdu_request = req->gdu_request->u.z3950;
1940         if (process_z_request(assoc, req, &msg) < 0)
1941             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1942     }
1943     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1944         process_http_request(assoc, req);
1945     else
1946     {
1947         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1948     }
1949 }
1950
1951 /*
1952  * Initiate request processing.
1953  */
1954 static int process_z_request(association *assoc, request *req, char **msg)
1955 {
1956     int fd = -1;
1957     Z_APDU *res;
1958     int retval;
1959
1960     *msg = "Unknown Error";
1961     assert(req && req->state == REQUEST_IDLE);
1962     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1963     {
1964         *msg = "Missing InitRequest";
1965         return -1;
1966     }
1967     switch (req->apdu_request->which)
1968     {
1969     case Z_APDU_initRequest:
1970         res = process_initRequest(assoc, req); break;
1971     case Z_APDU_searchRequest:
1972         res = process_searchRequest(assoc, req, &fd); break;
1973     case Z_APDU_presentRequest:
1974         res = process_presentRequest(assoc, req, &fd); break;
1975     case Z_APDU_scanRequest:
1976         if (assoc->init->bend_scan)
1977             res = process_scanRequest(assoc, req, &fd);
1978         else
1979         {
1980             *msg = "Cannot handle Scan APDU";
1981             return -1;
1982         }
1983         break;
1984     case Z_APDU_extendedServicesRequest:
1985         if (assoc->init->bend_esrequest)
1986             res = process_ESRequest(assoc, req, &fd);
1987         else
1988         {
1989             *msg = "Cannot handle Extended Services APDU";
1990             return -1;
1991         }
1992         break;
1993     case Z_APDU_sortRequest:
1994         if (assoc->init->bend_sort)
1995             res = process_sortRequest(assoc, req, &fd);
1996         else
1997         {
1998             *msg = "Cannot handle Sort APDU";
1999             return -1;
2000         }
2001         break;
2002     case Z_APDU_close:
2003         process_close(assoc, req);
2004         return 0;
2005     case Z_APDU_deleteResultSetRequest:
2006         if (assoc->init->bend_delete)
2007             res = process_deleteRequest(assoc, req, &fd);
2008         else
2009         {
2010             *msg = "Cannot handle Delete APDU";
2011             return -1;
2012         }
2013         break;
2014     case Z_APDU_segmentRequest:
2015         if (assoc->init->bend_segment)
2016         {
2017             res = process_segmentRequest (assoc, req);
2018         }
2019         else
2020         {
2021             *msg = "Cannot handle Segment APDU";
2022             return -1;
2023         }
2024         break;
2025     case Z_APDU_triggerResourceControlRequest:
2026         return 0;
2027     default:
2028         *msg = "Bad APDU received";
2029         return -1;
2030     }
2031     if (res)
2032     {
2033         yaz_log(YLOG_DEBUG, "  result immediately available");
2034         retval = process_z_response(assoc, req, res);
2035     }
2036     else if (fd < 0)
2037     {
2038         yaz_log(YLOG_DEBUG, "  result unavailble");
2039         retval = 0;
2040     }
2041     else /* no result yet - one will be provided later */
2042     {
2043         IOCHAN chan;
2044
2045         /* Set up an I/O handler for the fd supplied by the backend */
2046
2047         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2048         req->state = REQUEST_PENDING;
2049         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2050             abort();
2051         iochan_setdata(chan, assoc);
2052         retval = 0;
2053     }
2054     return retval;
2055 }
2056
2057 /*
2058  * Handle message from the backend.
2059  */
2060 void backend_response(IOCHAN i, int event)
2061 {
2062     association *assoc = (association *)iochan_getdata(i);
2063     request *req = request_head(&assoc->incoming);
2064     Z_APDU *res;
2065     int fd;
2066
2067     yaz_log(YLOG_DEBUG, "backend_response");
2068     assert(assoc && req && req->state != REQUEST_IDLE);
2069     /* determine what it is we're waiting for */
2070     switch (req->apdu_request->which)
2071     {
2072         case Z_APDU_searchRequest:
2073             res = response_searchRequest(assoc, req, 0, &fd); break;
2074 #if 0
2075         case Z_APDU_presentRequest:
2076             res = response_presentRequest(assoc, req, 0, &fd); break;
2077         case Z_APDU_scanRequest:
2078             res = response_scanRequest(assoc, req, 0, &fd); break;
2079 #endif
2080         default:
2081             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2082             abort();
2083     }
2084     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2085     {
2086         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2087         do_close(assoc, Z_Close_systemProblem, 0);
2088         iochan_destroy(i);
2089         return;
2090     }
2091     else if (!res) /* no result yet - try again later */
2092     {
2093         yaz_log(YLOG_DEBUG, "   no result yet");
2094         iochan_setfd(i, fd); /* in case fd has changed */
2095     }
2096 }
2097
2098 /*
2099  * Encode response, and transfer the request structure to the outgoing queue.
2100  */
2101 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2102 {
2103     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2104
2105     if (assoc->print)
2106     {
2107         if (!z_GDU(assoc->print, &res, 0, 0))
2108             yaz_log(YLOG_WARN, "ODR print error: %s",
2109                 odr_errmsg(odr_geterror(assoc->print)));
2110         odr_reset(assoc->print);
2111     }
2112     if (!z_GDU(assoc->encode, &res, 0, 0))
2113     {
2114         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2115                 odr_errmsg(odr_geterror(assoc->decode)),
2116                 odr_getelement(assoc->decode));
2117         return -1;
2118     }
2119     req->response = odr_getbuf(assoc->encode, &req->len_response,
2120         &req->size_response);
2121     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2122     odr_reset(assoc->encode);
2123     req->state = REQUEST_IDLE;
2124     request_enq(&assoc->outgoing, req);
2125     /* turn the work over to the ir_session handler */
2126     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2127     assoc->cs_put_mask = EVENT_OUTPUT;
2128     /* Is there more work to be done? give that to the input handler too */
2129     for (;;)
2130     {
2131         req = request_head(&assoc->incoming);
2132         if (req && req->state == REQUEST_IDLE)
2133         {
2134             yaz_log(YLOG_LOG, "process next request 3");
2135             request_deq(&assoc->incoming);
2136             process_gdu_request(assoc, req);
2137         }
2138         else
2139             break;
2140     }
2141     return 0;
2142 }
2143
2144 /*
2145  * Encode response, and transfer the request structure to the outgoing queue.
2146  */
2147 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2148 {
2149     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2150     gres->which = Z_GDU_Z3950;
2151     gres->u.z3950 = res;
2152
2153     return process_gdu_response(assoc, req, gres);
2154 }
2155
2156 static char *get_vhost(Z_OtherInformation *otherInfo)
2157 {
2158     return yaz_oi_get_string_oidval(&otherInfo, VAL_PROXY, 1, 0);
2159 }
2160
2161 /*
2162  * Handle init request.
2163  * At the moment, we don't check the options
2164  * anywhere else in the code - we just try not to do anything that would
2165  * break a naive client. We'll toss 'em into the association block when
2166  * we need them there.
2167  */
2168 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2169 {
2170     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2171     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2172     Z_InitResponse *resp = apdu->u.initResponse;
2173     bend_initresult *binitres;
2174     char *version;
2175     char options[140];
2176     statserv_options_block *cb = 0;  /* by default no control for backend */
2177
2178     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2179         cb = statserv_getcontrol();  /* got control block for backend */
2180
2181     if (cb && assoc->backend)
2182         (*cb->bend_close)(assoc->backend);
2183
2184     yaz_log(log_requestdetail, "Got initRequest");
2185     if (req->implementationId)
2186         yaz_log(log_requestdetail, "Id:        %s",
2187                 req->implementationId);
2188     if (req->implementationName)
2189         yaz_log(log_requestdetail, "Name:      %s",
2190                 req->implementationName);
2191     if (req->implementationVersion)
2192         yaz_log(log_requestdetail, "Version:   %s",
2193                 req->implementationVersion);
2194
2195     assoc_init_reset(assoc);
2196
2197     assoc->init->auth = req->idAuthentication;
2198     assoc->init->referenceId = req->referenceId;
2199
2200     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2201     {
2202         Z_CharSetandLanguageNegotiation *negotiation =
2203             yaz_get_charneg_record (req->otherInfo);
2204         if (negotiation &&
2205             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2206             assoc->init->charneg_request = negotiation;
2207     }
2208
2209     assoc->backend = 0;
2210     if (cb)
2211     {
2212         if (req->implementationVersion)
2213             yaz_log(log_requestdetail, "Config:    %s",
2214                     cb->configname);
2215
2216         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2217
2218         /* we have a backend control block, so call that init function */
2219         if (!(binitres = (*cb->bend_init)(assoc->init)))
2220         {
2221             yaz_log(YLOG_WARN, "Bad response from backend.");
2222             return 0;
2223         }
2224         assoc->backend = binitres->handle;
2225     }
2226     else
2227     {
2228         /* no backend. return error */
2229         binitres = odr_malloc(assoc->encode, sizeof(*binitres));
2230         binitres->errstring = 0;
2231         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2232         iochan_settimeout(assoc->client_chan, 10);
2233     }
2234     if ((assoc->init->bend_sort))
2235         yaz_log (YLOG_DEBUG, "Sort handler installed");
2236     if ((assoc->init->bend_search))
2237         yaz_log (YLOG_DEBUG, "Search handler installed");
2238     if ((assoc->init->bend_present))
2239         yaz_log (YLOG_DEBUG, "Present handler installed");
2240     if ((assoc->init->bend_esrequest))
2241         yaz_log (YLOG_DEBUG, "ESRequest handler installed");
2242     if ((assoc->init->bend_delete))
2243         yaz_log (YLOG_DEBUG, "Delete handler installed");
2244     if ((assoc->init->bend_scan))
2245         yaz_log (YLOG_DEBUG, "Scan handler installed");
2246     if ((assoc->init->bend_segment))
2247         yaz_log (YLOG_DEBUG, "Segment handler installed");
2248
2249     resp->referenceId = req->referenceId;
2250     *options = '\0';
2251     /* let's tell the client what we can do */
2252     if (ODR_MASK_GET(req->options, Z_Options_search))
2253     {
2254         ODR_MASK_SET(resp->options, Z_Options_search);
2255         strcat(options, "srch");
2256     }
2257     if (ODR_MASK_GET(req->options, Z_Options_present))
2258     {
2259         ODR_MASK_SET(resp->options, Z_Options_present);
2260         strcat(options, " prst");
2261     }
2262     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2263         assoc->init->bend_delete)
2264     {
2265         ODR_MASK_SET(resp->options, Z_Options_delSet);
2266         strcat(options, " del");
2267     }
2268     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2269         assoc->init->bend_esrequest)
2270     {
2271         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2272         strcat (options, " extendedServices");
2273     }
2274     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2275     {
2276         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2277         strcat(options, " namedresults");
2278     }
2279     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2280     {
2281         ODR_MASK_SET(resp->options, Z_Options_scan);
2282         strcat(options, " scan");
2283     }
2284     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2285     {
2286         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2287         strcat(options, " concurrop");
2288     }
2289     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2290     {
2291         ODR_MASK_SET(resp->options, Z_Options_sort);
2292         strcat(options, " sort");
2293     }
2294
2295     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
2296         && assoc->init->charneg_response)
2297     {
2298         Z_OtherInformation **p;
2299         Z_OtherInformationUnit *p0;
2300
2301         yaz_oi_APDU(apdu, &p);
2302
2303         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
2304             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2305
2306             p0->which = Z_OtherInfo_externallyDefinedInfo;
2307             p0->information.externallyDefinedInfo =
2308                 assoc->init->charneg_response;
2309         }
2310         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2311         strcat(options, " negotiation");
2312     }
2313
2314     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2315         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2316
2317     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2318     {
2319         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2320         assoc->version = 1; /* 1 & 2 are equivalent */
2321     }
2322     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2323     {
2324         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2325         assoc->version = 2;
2326     }
2327     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2328     {
2329         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2330         assoc->version = 3;
2331     }
2332
2333     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2334
2335     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2336         assoc->maximumRecordSize = *req->maximumRecordSize;
2337
2338     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2339         assoc->preferredMessageSize = *req->preferredMessageSize;
2340
2341     resp->preferredMessageSize = &assoc->preferredMessageSize;
2342     resp->maximumRecordSize = &assoc->maximumRecordSize;
2343
2344     resp->implementationId = odr_prepend(assoc->encode,
2345                 assoc->init->implementation_id,
2346                 resp->implementationId);
2347
2348     resp->implementationName = odr_prepend(assoc->encode,
2349                 assoc->init->implementation_name,
2350                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2351
2352     version = odr_strdup(assoc->encode, "$Revision: 1.105 $");
2353     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2354         version[strlen(version)-2] = '\0';
2355     resp->implementationVersion = odr_prepend(assoc->encode,
2356                 assoc->init->implementation_version,
2357                 odr_prepend(assoc->encode, &version[11],
2358                             resp->implementationVersion));
2359
2360     if (binitres->errcode)
2361     {
2362         assoc->state = ASSOC_DEAD;
2363         resp->userInformationField =
2364             init_diagnostics(assoc->encode, binitres->errcode,
2365                              binitres->errstring);
2366         *resp->result = 0;
2367     }
2368     if (log_request)
2369     {
2370         if (!req->idAuthentication)
2371             yaz_log(log_request, "Auth none");
2372         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2373         {
2374             const char *open = req->idAuthentication->u.open;
2375             const char *slash = strchr(open, '/');
2376             int len;
2377             if (slash)
2378                 len = slash - open;
2379             else
2380                 len = strlen(open);
2381                 yaz_log(log_request, "Auth open %.*s", len, open);
2382         }
2383         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2384         {
2385             const char *user = req->idAuthentication->u.idPass->userId;
2386             const char *group = req->idAuthentication->u.idPass->groupId;
2387             yaz_log(log_request, "Auth idPass %s %s",
2388                     user ? user : "-", group ? group : "-");
2389         }
2390         else if (req->idAuthentication->which
2391                  == Z_IdAuthentication_anonymous)
2392         {
2393             yaz_log(log_request, "Auth anonymous");
2394         }
2395         else
2396         {
2397             yaz_log(log_request, "Auth other");
2398         }
2399     }
2400     if (log_request)
2401     {
2402         WRBUF wr = wrbuf_alloc();
2403         wrbuf_printf(wr, "Init ");
2404         if (binitres->errcode)
2405             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2406         else
2407             wrbuf_printf(wr, "OK -");
2408         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2409                      (req->implementationId ? req->implementationId :"-"),
2410                      (req->implementationName ?
2411                       req->implementationName : "-"),
2412                      (req->implementationVersion ?
2413                       req->implementationVersion : "-")
2414             );
2415         yaz_log(log_request, "%s", wrbuf_buf(wr));
2416         wrbuf_free(wr, 1);
2417     }
2418     return apdu;
2419 }
2420
2421 /*
2422  * Set the specified `errcode' and `errstring' into a UserInfo-1
2423  * external to be returned to the client in accordance with Z35.90
2424  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2425  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2426  */
2427 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2428 {
2429     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2430         addinfo ? " -- " : "", addinfo ? addinfo : "");
2431     return zget_init_diagnostics(odr, error, addinfo);
2432 }
2433
2434 /*
2435  * nonsurrogate diagnostic record.
2436  */
2437 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2438 {
2439     Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec));
2440
2441     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2442             addinfo ? " -- " : "", addinfo ? addinfo : "");
2443
2444     rec->which = Z_Records_NSD;
2445     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2446                                                            error, addinfo);
2447     return rec;
2448 }
2449
2450 /*
2451  * surrogate diagnostic.
2452  */
2453 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2454                                           const char *dbname,
2455                                           int error, const char *addinfo)
2456 {
2457     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2458             addinfo ? " -- " : "", addinfo ? addinfo : "");
2459     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2460 }
2461
2462 static Z_Records *pack_records(association *a, char *setname, int start,
2463                                int *num, Z_RecordComposition *comp,
2464                                int *next, int *pres, oid_value format,
2465                                Z_ReferenceId *referenceId,
2466                                int *oid, int *errcode)
2467 {
2468     int recno, total_length = 0, toget = *num, dumped_records = 0;
2469     Z_Records *records =
2470         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
2471     Z_NamePlusRecordList *reclist =
2472         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
2473     Z_NamePlusRecord **list =
2474         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
2475
2476     records->which = Z_Records_DBOSD;
2477     records->u.databaseOrSurDiagnostics = reclist;
2478     reclist->num_records = 0;
2479     reclist->records = list;
2480     *pres = Z_PresentStatus_success;
2481     *num = 0;
2482     *next = 0;
2483
2484     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2485     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2486         a->maximumRecordSize);
2487     for (recno = start; reclist->num_records < toget; recno++)
2488     {
2489         bend_fetch_rr freq;
2490         Z_NamePlusRecord *thisrec;
2491         int this_length = 0;
2492         /*
2493          * we get the number of bytes allocated on the stream before any
2494          * allocation done by the backend - this should give us a reasonable
2495          * idea of the total size of the data so far.
2496          */
2497         total_length = odr_total(a->encode) - dumped_records;
2498         freq.errcode = 0;
2499         freq.errstring = 0;
2500         freq.basename = 0;
2501         freq.len = 0;
2502         freq.record = 0;
2503         freq.last_in_set = 0;
2504         freq.setname = setname;
2505         freq.surrogate_flag = 0;
2506         freq.number = recno;
2507         freq.comp = comp;
2508         freq.request_format = format;
2509         freq.request_format_raw = oid;
2510         freq.output_format = format;
2511         freq.output_format_raw = 0;
2512         freq.stream = a->encode;
2513         freq.print = a->print;
2514         freq.referenceId = referenceId;
2515         freq.schema = 0;
2516
2517         retrieve_fetch(a, &freq);
2518
2519         *next = freq.last_in_set ? 0 : recno + 1;
2520
2521         /* backend should be able to signal whether error is system-wide
2522            or only pertaining to current record */
2523         if (freq.errcode)
2524         {
2525             if (!freq.surrogate_flag)
2526             {
2527                 char s[20];
2528                 *pres = Z_PresentStatus_failure;
2529                 /* for 'present request out of range',
2530                    set addinfo to record position if not set */
2531                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2532                                 freq.errstring == 0)
2533                 {
2534                     sprintf (s, "%d", recno);
2535                     freq.errstring = s;
2536                 }
2537                 if (errcode)
2538                     *errcode = freq.errcode;
2539                 return diagrec(a, freq.errcode, freq.errstring);
2540             }
2541             reclist->records[reclist->num_records] =
2542                 surrogatediagrec(a, freq.basename, freq.errcode,
2543                                  freq.errstring);
2544             reclist->num_records++;
2545             continue;
2546         }
2547         if (freq.record == 0)  /* no error and no record ? */
2548         {
2549             *next = 0;   /* signal end-of-set and stop */
2550             break;
2551         }
2552         if (freq.len >= 0)
2553             this_length = freq.len;
2554         else
2555             this_length = odr_total(a->encode) - total_length - dumped_records;
2556         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2557             this_length, total_length, dumped_records);
2558         if (a->preferredMessageSize > 0 &&
2559                 this_length + total_length > a->preferredMessageSize)
2560         {
2561             /* record is small enough, really */
2562             if (this_length <= a->preferredMessageSize && recno > start)
2563             {
2564                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2565                 *pres = Z_PresentStatus_partial_2;
2566                 break;
2567             }
2568             /* record can only be fetched by itself */
2569             if (this_length < a->maximumRecordSize)
2570             {
2571                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2572                 if (toget > 1)
2573                 {
2574                     yaz_log(YLOG_DEBUG, "  Dropped it");
2575                     reclist->records[reclist->num_records] =
2576                          surrogatediagrec(a, freq.basename, 16, 0);
2577                     reclist->num_records++;
2578                     dumped_records += this_length;
2579                     continue;
2580                 }
2581             }
2582             else /* too big entirely */
2583             {
2584                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2585                         this_length, a->maximumRecordSize);
2586                 reclist->records[reclist->num_records] =
2587                     surrogatediagrec(a, freq.basename, 17, 0);
2588                 reclist->num_records++;
2589                 dumped_records += this_length;
2590                 continue;
2591             }
2592         }
2593
2594         if (!(thisrec = (Z_NamePlusRecord *)
2595               odr_malloc(a->encode, sizeof(*thisrec))))
2596             return 0;
2597         if (freq.basename)
2598             thisrec->databaseName = odr_strdup(a->encode, freq.basename);
2599         else
2600             thisrec->databaseName = 0;
2601         thisrec->which = Z_NamePlusRecord_databaseRecord;
2602
2603         if (freq.output_format_raw)
2604         {
2605             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
2606             freq.output_format = ident->value;
2607         }
2608         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
2609                                                  freq.record, freq.len);
2610         if (!thisrec->u.databaseRecord)
2611             return 0;
2612         reclist->records[reclist->num_records] = thisrec;
2613         reclist->num_records++;
2614     }
2615     *num = reclist->num_records;
2616     return records;
2617 }
2618
2619 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2620     int *fd)
2621 {
2622     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2623     bend_search_rr *bsrr =
2624         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
2625
2626     yaz_log(log_requestdetail, "Got SearchRequest.");
2627     bsrr->fd = fd;
2628     bsrr->request = reqb;
2629     bsrr->association = assoc;
2630     bsrr->referenceId = req->referenceId;
2631     save_referenceId (reqb, bsrr->referenceId);
2632     bsrr->srw_sortKeys = 0;
2633     bsrr->srw_setname = 0;
2634     bsrr->srw_setnameIdleTime = 0;
2635
2636     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2637     if (req->databaseNames)
2638     {
2639         int i;
2640         for (i = 0; i < req->num_databaseNames; i++)
2641             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
2642     }
2643
2644     yaz_log_zquery_level(log_requestdetail,req->query);
2645
2646     if (assoc->init->bend_search)
2647     {
2648         bsrr->setname = req->resultSetName;
2649         bsrr->replace_set = *req->replaceIndicator;
2650         bsrr->num_bases = req->num_databaseNames;
2651         bsrr->basenames = req->databaseNames;
2652         bsrr->query = req->query;
2653         bsrr->stream = assoc->encode;
2654         nmem_transfer(bsrr->stream->mem, reqb->request_mem);
2655         bsrr->decode = assoc->decode;
2656         bsrr->print = assoc->print;
2657         bsrr->hits = 0;
2658         bsrr->errcode = 0;
2659         bsrr->errstring = NULL;
2660         bsrr->search_info = NULL;
2661
2662         if (assoc->server && assoc->server->cql_transform
2663             && req->query->which == Z_Query_type_104
2664             && req->query->u.type_104->which == Z_External_CQL)
2665         {
2666             /* have a CQL query and a CQL to PQF transform .. */
2667             int srw_errcode =
2668                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2669                         assoc->server->cql_transform, bsrr->query);
2670             if (srw_errcode)
2671                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2672         }
2673         if (!bsrr->errcode)
2674             (assoc->init->bend_search)(assoc->backend, bsrr);
2675         if (!bsrr->request)  /* backend not ready with the search response */
2676             return 0;  /* should not be used any more */
2677     }
2678     else
2679     {
2680         /* FIXME - make a diagnostic for it */
2681         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2682     }
2683     return response_searchRequest(assoc, reqb, bsrr, fd);
2684 }
2685
2686 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2687
2688 /*
2689  * Prepare a searchresponse based on the backend results. We probably want
2690  * to look at making the fetching of records nonblocking as well, but
2691  * so far, we'll keep things simple.
2692  * If bsrt is null, that means we're called in response to a communications
2693  * event, and we'll have to get the response for ourselves.
2694  */
2695 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2696     bend_search_rr *bsrt, int *fd)
2697 {
2698     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2699     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2700     Z_SearchResponse *resp = (Z_SearchResponse *)
2701         odr_malloc (assoc->encode, sizeof(*resp));
2702     int *nulint = odr_intdup (assoc->encode, 0);
2703     bool_t *sr = odr_intdup(assoc->encode, 1);
2704     int *next = odr_intdup(assoc->encode, 0);
2705     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2706     int returnedrecs=0;
2707
2708     apdu->which = Z_APDU_searchResponse;
2709     apdu->u.searchResponse = resp;
2710     resp->referenceId = req->referenceId;
2711     resp->additionalSearchInfo = 0;
2712     resp->otherInfo = 0;
2713     *fd = -1;
2714     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2715     {
2716         yaz_log(YLOG_FATAL, "Bad result from backend");
2717         return 0;
2718     }
2719     else if (bsrt->errcode)
2720     {
2721         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2722         resp->resultCount = nulint;
2723         resp->numberOfRecordsReturned = nulint;
2724         resp->nextResultSetPosition = nulint;
2725         resp->searchStatus = nulint;
2726         resp->resultSetStatus = none;
2727         resp->presentStatus = 0;
2728     }
2729     else
2730     {
2731         int *toget = odr_intdup(assoc->encode, 0);
2732         int *presst = odr_intdup(assoc->encode, 0);
2733         Z_RecordComposition comp, *compp = 0;
2734
2735         yaz_log (log_requestdetail, "resultCount: %d", bsrt->hits);
2736
2737         resp->records = 0;
2738         resp->resultCount = &bsrt->hits;
2739
2740         comp.which = Z_RecordComp_simple;
2741         /* how many records does the user agent want, then? */
2742         if (bsrt->hits <= *req->smallSetUpperBound)
2743         {
2744             *toget = bsrt->hits;
2745             if ((comp.u.simple = req->smallSetElementSetNames))
2746                 compp = &comp;
2747         }
2748         else if (bsrt->hits < *req->largeSetLowerBound)
2749         {
2750             *toget = *req->mediumSetPresentNumber;
2751             if (*toget > bsrt->hits)
2752                 *toget = bsrt->hits;
2753             if ((comp.u.simple = req->mediumSetElementSetNames))
2754                 compp = &comp;
2755         }
2756         else
2757             *toget = 0;
2758
2759         if (*toget && !resp->records)
2760         {
2761             oident *prefformat;
2762             oid_value form;
2763
2764             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2765                 form = VAL_NONE;
2766             else
2767                 form = prefformat->value;
2768
2769             /* Call bend_present if defined */
2770             if (assoc->init->bend_present)
2771             {
2772                 bend_present_rr *bprr = (bend_present_rr *)
2773                     nmem_malloc (reqb->request_mem, sizeof(*bprr));
2774                 bprr->setname = req->resultSetName;
2775                 bprr->start = 1;
2776                 bprr->number = *toget;
2777                 bprr->format = form;
2778                 bprr->comp = compp;
2779                 bprr->referenceId = req->referenceId;
2780                 bprr->stream = assoc->encode;
2781                 bprr->print = assoc->print;
2782                 bprr->request = reqb;
2783                 bprr->association = assoc;
2784                 bprr->errcode = 0;
2785                 bprr->errstring = NULL;
2786                 (*assoc->init->bend_present)(assoc->backend, bprr);
2787
2788                 if (!bprr->request)
2789                     return 0;
2790                 if (bprr->errcode)
2791                 {
2792                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2793                     *resp->presentStatus = Z_PresentStatus_failure;
2794                 }
2795             }
2796
2797             if (!resp->records)
2798                 resp->records = pack_records(assoc, req->resultSetName, 1,
2799                                              toget, compp, next, presst, form, req->referenceId,
2800                                              req->preferredRecordSyntax, NULL);
2801             if (!resp->records)
2802                 return 0;
2803             resp->numberOfRecordsReturned = toget;
2804             returnedrecs = *toget;
2805             resp->nextResultSetPosition = next;
2806             resp->searchStatus = sr;
2807             resp->resultSetStatus = 0;
2808             resp->presentStatus = presst;
2809         }
2810         else
2811         {
2812             if (*resp->resultCount)
2813                 *next = 1;
2814             resp->numberOfRecordsReturned = nulint;
2815             resp->nextResultSetPosition = next;
2816             resp->searchStatus = sr;
2817             resp->resultSetStatus = 0;
2818             resp->presentStatus = 0;
2819         }
2820     }
2821     resp->additionalSearchInfo = bsrt->search_info;
2822
2823     if (log_request)
2824     {
2825         int i;
2826         WRBUF wr = wrbuf_alloc();
2827
2828         for (i = 0 ; i < req->num_databaseNames; i++){
2829             if (i)
2830                 wrbuf_printf(wr, "+");
2831             wrbuf_printf(wr, req->databaseNames[i]);
2832         }
2833         wrbuf_printf(wr, " ");
2834
2835         if (bsrt->errcode)
2836             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2837         else
2838             wrbuf_printf(wr, "OK %d", bsrt->hits);
2839         wrbuf_printf(wr, " %s 1+%d ",
2840                      req->resultSetName, returnedrecs);
2841         yaz_query_to_wrbuf(wr, req->query);
2842
2843         yaz_log(log_request, "Search %s", wrbuf_buf(wr));
2844         wrbuf_free(wr, 1);
2845     }
2846     return apdu;
2847 }
2848
2849 /*
2850  * Maybe we got a little over-friendly when we designed bend_fetch to
2851  * get only one record at a time. Some backends can optimise multiple-record
2852  * fetches, and at any rate, there is some overhead involved in
2853  * all that selecting and hopping around. Problem is, of course, that the
2854  * frontend can't know ahead of time how many records it'll need to
2855  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2856  * is downright lousy as a bulk data transfer protocol.
2857  *
2858  * To start with, we'll do the fetching of records from the backend
2859  * in one operation: To save some trips in and out of the event-handler,
2860  * and to simplify the interface to pack_records. At any rate, asynch
2861  * operation is more fun in operations that have an unpredictable execution
2862  * speed - which is normally more true for search than for present.
2863  */
2864 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2865                                       int *fd)
2866 {
2867     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2868     oident *prefformat;
2869     oid_value form;
2870     Z_APDU *apdu;
2871     Z_PresentResponse *resp;
2872     int *next;
2873     int *num;
2874     int errcode = 0;
2875     const char *errstring = 0;
2876
2877     yaz_log(log_requestdetail, "Got PresentRequest.");
2878
2879     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2880         form = VAL_NONE;
2881     else
2882         form = prefformat->value;
2883     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2884     resp->records = 0;
2885     resp->presentStatus = odr_intdup(assoc->encode, 0);
2886     if (assoc->init->bend_present)
2887     {
2888         bend_present_rr *bprr = (bend_present_rr *)
2889             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2890         bprr->setname = req->resultSetId;
2891         bprr->start = *req->resultSetStartPoint;
2892         bprr->number = *req->numberOfRecordsRequested;
2893         bprr->format = form;
2894         bprr->comp = req->recordComposition;
2895         bprr->referenceId = req->referenceId;
2896         bprr->stream = assoc->encode;
2897         bprr->print = assoc->print;
2898         bprr->request = reqb;
2899         bprr->association = assoc;
2900         bprr->errcode = 0;
2901         bprr->errstring = NULL;
2902         (*assoc->init->bend_present)(assoc->backend, bprr);
2903
2904         if (!bprr->request)
2905             return 0; /* should not happen */
2906         if (bprr->errcode)
2907         {
2908             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2909             *resp->presentStatus = Z_PresentStatus_failure;
2910             errcode = bprr->errcode;
2911             errstring = bprr->errstring;
2912         }
2913     }
2914     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2915     next = odr_intdup(assoc->encode, 0);
2916     num = odr_intdup(assoc->encode, 0);
2917
2918     apdu->which = Z_APDU_presentResponse;
2919     apdu->u.presentResponse = resp;
2920     resp->referenceId = req->referenceId;
2921     resp->otherInfo = 0;
2922
2923     if (!resp->records)
2924     {
2925         *num = *req->numberOfRecordsRequested;
2926         resp->records =
2927             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2928                          num, req->recordComposition, next,
2929                          resp->presentStatus,
2930                          form, req->referenceId, req->preferredRecordSyntax,
2931                          &errcode);
2932     }
2933     if (log_request)
2934     {
2935         WRBUF wr = wrbuf_alloc();
2936         wrbuf_printf(wr, "Present ");
2937
2938         if (*resp->presentStatus == Z_PresentStatus_failure)
2939             wrbuf_printf(wr, "ERROR %d ", errcode);
2940         else if (*resp->presentStatus == Z_PresentStatus_success)
2941             wrbuf_printf(wr, "OK -  ");
2942         else
2943             wrbuf_printf(wr, "Partial %d - ", *resp->presentStatus);
2944
2945         wrbuf_printf(wr, " %s %d+%d ",
2946                 req->resultSetId, *req->resultSetStartPoint,
2947                 *req->numberOfRecordsRequested);
2948         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2949         wrbuf_free(wr, 1);
2950     }
2951     if (!resp->records)
2952         return 0;
2953     resp->numberOfRecordsReturned = num;
2954     resp->nextResultSetPosition = next;
2955
2956     return apdu;
2957 }
2958
2959 /*
2960  * Scan was implemented rather in a hurry, and with support for only the basic
2961  * elements of the service in the backend API. Suggestions are welcome.
2962  */
2963 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2964 {
2965     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2966     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2967     Z_ScanResponse *res = (Z_ScanResponse *)
2968         odr_malloc (assoc->encode, sizeof(*res));
2969     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2970     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2971     Z_ListEntries *ents = (Z_ListEntries *)
2972         odr_malloc (assoc->encode, sizeof(*ents));
2973     Z_DiagRecs *diagrecs_p = NULL;
2974     oident *attset;
2975     bend_scan_rr *bsrr = (bend_scan_rr *)
2976         odr_malloc (assoc->encode, sizeof(*bsrr));
2977     struct scan_entry *save_entries;
2978
2979     yaz_log(log_requestdetail, "Got ScanRequest");
2980
2981     apdu->which = Z_APDU_scanResponse;
2982     apdu->u.scanResponse = res;
2983     res->referenceId = req->referenceId;
2984
2985     /* if step is absent, set it to 0 */
2986     res->stepSize = odr_intdup(assoc->encode, 0);
2987     if (req->stepSize)
2988         *res->stepSize = *req->stepSize;
2989
2990     res->scanStatus = scanStatus;
2991     res->numberOfEntriesReturned = numberOfEntriesReturned;
2992     res->positionOfTerm = 0;
2993     res->entries = ents;
2994     ents->num_entries = 0;
2995     ents->entries = NULL;
2996     ents->num_nonsurrogateDiagnostics = 0;
2997     ents->nonsurrogateDiagnostics = NULL;
2998     res->attributeSet = 0;
2999     res->otherInfo = 0;
3000
3001     if (req->databaseNames)
3002     {
3003         int i;
3004         for (i = 0; i < req->num_databaseNames; i++)
3005             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
3006     }
3007     bsrr->scanClause = 0;
3008     bsrr->errcode = 0;
3009     bsrr->errstring = 0;
3010     bsrr->num_bases = req->num_databaseNames;
3011     bsrr->basenames = req->databaseNames;
3012     bsrr->num_entries = *req->numberOfTermsRequested;
3013     bsrr->term = req->termListAndStartPoint;
3014     bsrr->referenceId = req->referenceId;
3015     bsrr->stream = assoc->encode;
3016     bsrr->print = assoc->print;
3017     bsrr->step_size = res->stepSize;
3018     bsrr->entries = 0;
3019     /* For YAZ 2.0 and earlier it was the backend handler that
3020        initialized entries (member display_term did not exist)
3021        YAZ 2.0 and later sets 'entries'  and initialize all members
3022        including 'display_term'. If YAZ 2.0 or later sees that
3023        entries was modified - we assume that it is an old handler and
3024        that 'display_term' is _not_ set.
3025     */
3026     if (bsrr->num_entries > 0)
3027     {
3028         int i;
3029         bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3030                                    bsrr->num_entries);
3031         for (i = 0; i<bsrr->num_entries; i++)
3032         {
3033             bsrr->entries[i].term = 0;
3034             bsrr->entries[i].occurrences = 0;
3035             bsrr->entries[i].errcode = 0;
3036             bsrr->entries[i].errstring = 0;
3037             bsrr->entries[i].display_term = 0;
3038         }
3039     }
3040     save_entries = bsrr->entries;  /* save it so we can compare later */
3041
3042     if (req->attributeSet &&
3043         (attset = oid_getentbyoid(req->attributeSet)) &&
3044         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
3045         bsrr->attributeset = attset->value;
3046     else
3047         bsrr->attributeset = VAL_NONE;
3048     log_scan_term_level (log_requestdetail, req->termListAndStartPoint,
3049             bsrr->attributeset);
3050     bsrr->term_position = req->preferredPositionInResponse ?
3051         *req->preferredPositionInResponse : 1;
3052
3053     ((int (*)(void *, bend_scan_rr *))
3054      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3055
3056     if (bsrr->errcode)
3057         diagrecs_p = zget_DiagRecs(assoc->encode,
3058                                    bsrr->errcode, bsrr->errstring);
3059     else
3060     {
3061         int i;
3062         Z_Entry **tab = (Z_Entry **)
3063             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
3064
3065         if (bsrr->status == BEND_SCAN_PARTIAL)
3066             *scanStatus = Z_Scan_partial_5;
3067         else
3068             *scanStatus = Z_Scan_success;
3069         ents->entries = tab;
3070         ents->num_entries = bsrr->num_entries;
3071         res->numberOfEntriesReturned = &ents->num_entries;
3072         res->positionOfTerm = &bsrr->term_position;
3073         for (i = 0; i < bsrr->num_entries; i++)
3074         {
3075             Z_Entry *e;
3076             Z_TermInfo *t;
3077             Odr_oct *o;
3078
3079             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3080             if (bsrr->entries[i].occurrences >= 0)
3081             {
3082                 e->which = Z_Entry_termInfo;
3083                 e->u.termInfo = t = (Z_TermInfo *)
3084                     odr_malloc(assoc->encode, sizeof(*t));
3085                 t->suggestedAttributes = 0;
3086                 t->displayTerm = 0;
3087                 if (save_entries == bsrr->entries &&
3088                     bsrr->entries[i].display_term)
3089                 {
3090                     /* the entries was _not_ set by the handler. So it's
3091                        safe to test for new member display_term. It is
3092                        NULL'ed by us.
3093                     */
3094                     t->displayTerm = odr_strdup(assoc->encode,
3095                                                 bsrr->entries[i].display_term);
3096                 }
3097                 t->alternativeTerm = 0;
3098                 t->byAttributes = 0;
3099                 t->otherTermInfo = 0;
3100                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3101                 t->term = (Z_Term *)
3102                     odr_malloc(assoc->encode, sizeof(*t->term));
3103                 t->term->which = Z_Term_general;
3104                 t->term->u.general = o =
3105                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3106                 o->buf = (unsigned char *)
3107                     odr_malloc(assoc->encode, o->len = o->size =
3108                                strlen(bsrr->entries[i].term));
3109                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3110                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3111                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3112             }
3113             else
3114             {
3115                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3116                                                   bsrr->entries[i].errcode,
3117                                                   bsrr->entries[i].errstring);
3118                 assert (drecs->num_diagRecs == 1);
3119                 e->which = Z_Entry_surrogateDiagnostic;
3120                 assert (drecs->diagRecs[0]);
3121                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3122             }
3123         }
3124     }
3125     if (diagrecs_p)
3126     {
3127         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3128         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3129     }
3130     if (log_request)
3131     {
3132         int i;
3133         WRBUF wr = wrbuf_alloc();
3134         wrbuf_printf(wr, "Scan ");
3135         for (i = 0 ; i < req->num_databaseNames; i++){
3136             if (i)
3137                 wrbuf_printf(wr, "+");
3138             wrbuf_printf(wr, req->databaseNames[i]);
3139         }
3140         wrbuf_printf(wr, " ");
3141
3142         if (bsrr->errcode){
3143             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3144             wrbuf_printf(wr, " ");
3145         }
3146         else
3147             wrbuf_printf(wr, "OK ");
3148         /* else if (*res->scanStatus == Z_Scan_success) */
3149         /*    wrbuf_printf(wr, "OK "); */
3150         /* else */
3151         /* wrbuf_printf(wr, "Partial "); */
3152
3153         if (*res->numberOfEntriesReturned)
3154             wrbuf_printf(wr, "%d - ", *res->numberOfEntriesReturned);
3155         else
3156             wrbuf_printf(wr, "0 - ");
3157
3158         wrbuf_printf(wr, "%d+%d+%d ",
3159                      (req->preferredPositionInResponse ?
3160                       *req->preferredPositionInResponse : 1),
3161                      *req->numberOfTermsRequested,
3162                      (res->stepSize ? *res->stepSize : 1));
3163
3164         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3165                           bsrr->attributeset);
3166         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3167         wrbuf_free(wr, 1);
3168     }
3169     return apdu;
3170 }
3171
3172 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3173     int *fd)
3174 {
3175     int i;
3176     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3177     Z_SortResponse *res = (Z_SortResponse *)
3178         odr_malloc (assoc->encode, sizeof(*res));
3179     bend_sort_rr *bsrr = (bend_sort_rr *)
3180         odr_malloc (assoc->encode, sizeof(*bsrr));
3181
3182     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3183
3184     yaz_log(log_requestdetail, "Got SortRequest.");
3185
3186     bsrr->num_input_setnames = req->num_inputResultSetNames;
3187     for (i=0;i<req->num_inputResultSetNames;i++)
3188         yaz_log(log_requestdetail, "Input resultset: '%s'",
3189                 req->inputResultSetNames[i]);
3190     bsrr->input_setnames = req->inputResultSetNames;
3191     bsrr->referenceId = req->referenceId;
3192     bsrr->output_setname = req->sortedResultSetName;
3193     yaz_log(log_requestdetail, "Output resultset: '%s'",
3194                 req->sortedResultSetName);
3195     bsrr->sort_sequence = req->sortSequence;
3196        /*FIXME - dump those sequences too */
3197     bsrr->stream = assoc->encode;
3198     bsrr->print = assoc->print;
3199
3200     bsrr->sort_status = Z_SortResponse_failure;
3201     bsrr->errcode = 0;
3202     bsrr->errstring = 0;
3203
3204     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3205
3206     res->referenceId = bsrr->referenceId;
3207     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3208     res->resultSetStatus = 0;
3209     if (bsrr->errcode)
3210     {
3211         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3212                                        bsrr->errcode, bsrr->errstring);
3213         res->diagnostics = dr->diagRecs;
3214         res->num_diagnostics = dr->num_diagRecs;
3215     }
3216     else
3217     {
3218         res->num_diagnostics = 0;
3219         res->diagnostics = 0;
3220     }
3221     res->resultCount = 0;
3222     res->otherInfo = 0;
3223
3224     apdu->which = Z_APDU_sortResponse;
3225     apdu->u.sortResponse = res;
3226     if (log_request)
3227     {
3228         WRBUF wr = wrbuf_alloc();
3229         wrbuf_printf(wr, "Sort ");
3230         if (bsrr->errcode)
3231             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3232         else
3233             wrbuf_printf(wr,  "OK -");
3234         wrbuf_printf(wr, " (");
3235         for (i = 0; i<req->num_inputResultSetNames; i++)
3236         {
3237             if (i)
3238                 wrbuf_printf(wr, "+");
3239             wrbuf_printf(wr, req->inputResultSetNames[i]);
3240         }
3241         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3242
3243         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3244         wrbuf_free(wr, 1);
3245     }
3246     return apdu;
3247 }
3248
3249 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3250     int *fd)
3251 {
3252     int i;
3253     Z_DeleteResultSetRequest *req =
3254         reqb->apdu_request->u.deleteResultSetRequest;
3255     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3256         odr_malloc (assoc->encode, sizeof(*res));
3257     bend_delete_rr *bdrr = (bend_delete_rr *)
3258         odr_malloc (assoc->encode, sizeof(*bdrr));
3259     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3260
3261     yaz_log(log_requestdetail, "Got DeleteRequest.");
3262
3263     bdrr->num_setnames = req->num_resultSetList;
3264     bdrr->setnames = req->resultSetList;
3265     for (i = 0; i<req->num_resultSetList; i++)
3266         yaz_log(log_requestdetail, "resultset: '%s'",
3267                 req->resultSetList[i]);
3268     bdrr->stream = assoc->encode;
3269     bdrr->print = assoc->print;
3270     bdrr->function = *req->deleteFunction;
3271     bdrr->referenceId = req->referenceId;
3272     bdrr->statuses = 0;
3273     if (bdrr->num_setnames > 0)
3274     {
3275         bdrr->statuses = (int*)
3276             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3277                        bdrr->num_setnames);
3278         for (i = 0; i < bdrr->num_setnames; i++)
3279             bdrr->statuses[i] = 0;
3280     }
3281     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3282
3283     res->referenceId = req->referenceId;
3284
3285     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3286
3287     res->deleteListStatuses = 0;
3288     if (bdrr->num_setnames > 0)
3289     {
3290         int i;
3291         res->deleteListStatuses = (Z_ListStatuses *)
3292             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3293         res->deleteListStatuses->num = bdrr->num_setnames;
3294         res->deleteListStatuses->elements =
3295             (Z_ListStatus **)
3296             odr_malloc (assoc->encode,
3297                         sizeof(*res->deleteListStatuses->elements) *
3298                         bdrr->num_setnames);
3299         for (i = 0; i<bdrr->num_setnames; i++)
3300         {
3301             res->deleteListStatuses->elements[i] =
3302                 (Z_ListStatus *)
3303                 odr_malloc (assoc->encode,
3304                             sizeof(**res->deleteListStatuses->elements));
3305             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3306             res->deleteListStatuses->elements[i]->id =
3307                 odr_strdup (assoc->encode, bdrr->setnames[i]);
3308         }
3309     }
3310     res->numberNotDeleted = 0;
3311     res->bulkStatuses = 0;
3312     res->deleteMessage = 0;
3313     res->otherInfo = 0;
3314
3315     apdu->which = Z_APDU_deleteResultSetResponse;
3316     apdu->u.deleteResultSetResponse = res;
3317     if (log_request)
3318     {
3319         WRBUF wr = wrbuf_alloc();
3320         wrbuf_printf(wr, "Delete ");
3321         if (bdrr->delete_status)
3322             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3323         else
3324             wrbuf_printf(wr, "OK -");
3325         for (i = 0; i<req->num_resultSetList; i++)
3326             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3327         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3328         wrbuf_free(wr, 1);
3329     }
3330     return apdu;
3331 }
3332
3333 static void process_close(association *assoc, request *reqb)
3334 {
3335     Z_Close *req = reqb->apdu_request->u.close;
3336     static char *reasons[] =
3337     {
3338         "finished",
3339         "shutdown",
3340         "systemProblem",
3341         "costLimit",
3342         "resources",
3343         "securityViolation",
3344         "protocolError",
3345         "lackOfActivity",
3346         "peerAbort",
3347         "unspecified"
3348     };
3349
3350     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3351         reasons[*req->closeReason], req->diagnosticInformation ?
3352         req->diagnosticInformation : "NULL");
3353     if (assoc->version < 3) /* to make do_force respond with close */
3354         assoc->version = 3;
3355     do_close_req(assoc, Z_Close_finished,
3356                  "Association terminated by client", reqb);
3357     yaz_log(log_request,"Close OK");
3358 }
3359
3360 void save_referenceId (request *reqb, Z_ReferenceId *refid)
3361 {
3362     if (refid)
3363     {
3364         reqb->len_refid = refid->len;
3365         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
3366         memcpy (reqb->refid, refid->buf, refid->len);
3367     }
3368     else
3369     {
3370         reqb->len_refid = 0;
3371         reqb->refid = NULL;
3372     }
3373 }
3374
3375 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
3376 {
3377     process_z_response (a, req, res);
3378 }
3379
3380 bend_request bend_request_mk (bend_association a)
3381 {
3382     request *nreq = request_get (&a->outgoing);
3383     nreq->request_mem = nmem_create ();
3384     return nreq;
3385 }
3386
3387 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
3388 {
3389     Z_ReferenceId *id;
3390     if (!req->refid)
3391         return 0;
3392     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
3393     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
3394     id->len = id->size = req->len_refid;
3395     memcpy (id->buf, req->refid, req->len_refid);
3396     return id;
3397 }
3398
3399 void bend_request_destroy (bend_request *req)
3400 {
3401     nmem_destroy((*req)->request_mem);
3402     request_release(*req);
3403     *req = NULL;
3404 }
3405
3406 int bend_backend_respond (bend_association a, bend_request req)
3407 {
3408     char *msg;
3409     int r;
3410     r = process_z_request (a, req, &msg);
3411     if (r < 0)
3412         yaz_log (YLOG_WARN, "%s", msg);
3413     return r;
3414 }
3415
3416 void bend_request_setdata(bend_request r, void *p)
3417 {
3418     r->clientData = p;
3419 }
3420
3421 void *bend_request_getdata(bend_request r)
3422 {
3423     return r->clientData;
3424 }
3425
3426 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
3427 {
3428     bend_segment_rr req;
3429
3430     req.segment = reqb->apdu_request->u.segmentRequest;
3431     req.stream = assoc->encode;
3432     req.decode = assoc->decode;
3433     req.print = assoc->print;
3434     req.association = assoc;
3435
3436     (*assoc->init->bend_segment)(assoc->backend, &req);
3437
3438     return 0;
3439 }
3440
3441 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3442 {
3443     bend_esrequest_rr esrequest;
3444     const char *ext_name = "unknown";
3445
3446     Z_ExtendedServicesRequest *req =
3447         reqb->apdu_request->u.extendedServicesRequest;
3448     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3449
3450     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3451
3452     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3453     esrequest.stream = assoc->encode;
3454     esrequest.decode = assoc->decode;
3455     esrequest.print = assoc->print;
3456     esrequest.errcode = 0;
3457     esrequest.errstring = NULL;
3458     esrequest.request = reqb;
3459     esrequest.association = assoc;
3460     esrequest.taskPackage = 0;
3461     esrequest.referenceId = req->referenceId;
3462
3463
3464     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3465     {
3466         switch(esrequest.esr->taskSpecificParameters->which)
3467         {
3468         case Z_External_itemOrder:
3469             ext_name = "ItemOrder"; break;
3470         case Z_External_update:
3471             ext_name = "Update"; break;
3472         case Z_External_update0:
3473             ext_name = "Update0"; break;
3474         case Z_External_ESAdmin:
3475             ext_name = "Admin"; break;
3476
3477         }
3478     }
3479
3480     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3481
3482     /* If the response is being delayed, return NULL */
3483     if (esrequest.request == NULL)
3484         return(NULL);
3485
3486     resp->referenceId = req->referenceId;
3487
3488     if (esrequest.errcode == -1)
3489     {
3490         /* Backend service indicates request will be processed */
3491         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3492         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3493     }
3494     else if (esrequest.errcode == 0)
3495     {
3496         /* Backend service indicates request will be processed */
3497         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3498         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3499     }
3500     else
3501     {
3502         Z_DiagRecs *diagRecs =
3503             zget_DiagRecs(assoc->encode, esrequest.errcode,
3504                           esrequest.errstring);
3505         /* Backend indicates error, request will not be processed */
3506         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3507         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3508         resp->num_diagnostics = diagRecs->num_diagRecs;
3509         resp->diagnostics = diagRecs->diagRecs;
3510         if (log_request)
3511         {
3512             WRBUF wr = wrbuf_alloc();
3513             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3514             yaz_log(log_request, "EsRequest %s", wrbuf_buf(wr) );
3515             wrbuf_free(wr, 1);
3516         }
3517
3518     }
3519     /* Do something with the members of bend_extendedservice */
3520     if (esrequest.taskPackage)
3521         resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED,
3522                                          (const char *)  esrequest.taskPackage,
3523                                           -1);
3524     yaz_log(YLOG_DEBUG,"Send the result apdu");
3525     return apdu;
3526 }
3527
3528 int bend_assoc_is_alive(bend_association assoc)
3529 {
3530     if (assoc->state == ASSOC_DEAD)
3531         return 0; /* already marked as dead. Don't check I/O chan anymore */
3532
3533     return iochan_is_alive(assoc->client_chan);
3534 }
3535
3536
3537 /*
3538  * Local variables:
3539  * c-basic-offset: 4
3540  * indent-tabs-mode: nil
3541  * End:
3542  * vim: shiftwidth=4 tabstop=8 expandtab
3543  */
3544