src/seshigh.c

   1 /* This file is part of the YAZ toolkit.
   2  * Copyright (C) Index Data
   3  * See the file LICENSE for details.
   4  */
   5 /**
   6  * \file seshigh.c
   7  * \brief Implements GFS session logic.
   8  *
   9  * Frontend server logic.
  10  *
  11  * This code receives incoming APDUs, and handles client requests by means
  12  * of the backend API.
  13  *
  14  * Some of the code is getting quite involved, compared to simpler servers -
  15  * primarily because it is asynchronous both in the communication with
  16  * the user and the backend. We think the complexity will pay off in
  17  * the form of greater flexibility when more asynchronous facilities
  18  * are implemented.
  19  *
  20  * Memory management has become somewhat involved. In the simple case, where
  21  * only one PDU is pending at a time, it will simply reuse the same memory,
  22  * once it has found its working size. When we enable multiple concurrent
  23  * operations, perhaps even with multiple parallel calls to the backend, it
  24  * will maintain a pool of buffers for encoding and decoding, trying to
  25  * minimize memory allocation/deallocation during normal operation.
  26  *
  27  */
  28 #if HAVE_CONFIG_H
  29 #include <config.h>
  30 #endif
  31
  32 #include <limits.h>
  33 #include <stdlib.h>
  34 #include <stdio.h>
  35 #include <assert.h>
  36
  37 #if HAVE_SYS_TYPES_H
  38 #include <sys/types.h>
  39 #endif
  40 #if HAVE_SYS_STAT_H
  41 #include <sys/stat.h>
  42 #endif
  43
  44 #ifdef WIN32
  45 #include <io.h>
  46 #define S_ISREG(x) (x & _S_IFREG)
  47 #include <process.h>
  48 #endif
  49
  50 #if HAVE_UNISTD_H
  51 #include <unistd.h>
  52 #endif
  53
  54 #if YAZ_HAVE_XML2
  55 #include <libxml/parser.h>
  56 #include <libxml/tree.h>
  57 #endif
  58
  59 #include <yaz/facet.h>
  60 #include <yaz/xmalloc.h>
  61 #include <yaz/comstack.h>
  62 #include "eventl.h"
  63 #include "session.h"
  64 #include "mime.h"
  65 #include <yaz/proto.h>
  66 #include <yaz/oid_db.h>
  67 #include <yaz/log.h>
  68 #include <yaz/logrpn.h>
  69 #include <yaz/querytowrbuf.h>
  70 #include <yaz/statserv.h>
  71 #include <yaz/diagbib1.h>
  72 #include <yaz/charneg.h>
  73 #include <yaz/otherinfo.h>
  74 #include <yaz/yaz-util.h>
  75 #include <yaz/pquery.h>
  76 #include <yaz/oid_db.h>
  77 #include <yaz/query-charset.h>
  78 #include <yaz/srw.h>
  79 #include <yaz/backend.h>
  80 #include <yaz/yaz-ccl.h>
  81
  82 static void process_gdu_request(association *assoc, request *req);
  83 static int process_z_request(association *assoc, request *req, char **msg);
  84 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  85 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  86 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  87 static Z_External *init_diagnostics(ODR odr, int errcode,
  88                                     const char *errstring);
  89 static Z_APDU *process_searchRequest(association *assoc, request *reqb);
  90 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  91                                       bend_search_rr *bsrr);
  92 static Z_APDU *process_presentRequest(association *assoc, request *reqb);
  93 static Z_APDU *process_scanRequest(association *assoc, request *reqb);
  94 static Z_APDU *process_sortRequest(association *assoc, request *reqb);
  95 static void process_close(association *assoc, request *reqb);
  96 static Z_APDU *process_deleteRequest(association *assoc, request *reqb);
  97 static Z_APDU *process_segmentRequest(association *assoc, request *reqb);
  98 static Z_APDU *process_ESRequest(association *assoc, request *reqb);
  99
 100 /* dynamic logging levels */
 101 static int logbits_set = 0;
 102 static int log_session = 0; /* one-line logs for session */
 103 static int log_sessiondetail = 0; /* more detailed stuff */
 104 static int log_request = 0; /* one-line logs for requests */
 105 static int log_requestdetail = 0;  /* more detailed stuff */
 106
 107 /** get_logbits sets global loglevel bits */
 108 static void get_logbits(void)
 109 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 110     if (!logbits_set)
 111     {
 112         logbits_set = 1;
 113         log_session = yaz_log_module_level("session");
 114         log_sessiondetail = yaz_log_module_level("sessiondetail");
 115         log_request = yaz_log_module_level("request");
 116         log_requestdetail = yaz_log_module_level("requestdetail");
 117     }
 118 }
 119
 120 static void wr_diag(WRBUF w, int error, const char *addinfo)
 121 {
 122     wrbuf_printf(w, "ERROR %d+", error);
 123     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
 124     if (addinfo)
 125     {
 126         wrbuf_puts(w, "+");
 127         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
 128     }
 129     wrbuf_puts(w, " ");
 130 }
 131
 132 static int odr_int_to_int(Odr_int v)
 133 {
 134     if (v >= INT_MAX)
 135         return INT_MAX;
 136     else if (v <= INT_MIN)
 137         return INT_MIN;
 138     else
 139         return (int) v;
 140 }
 141
 142 /*
 143  * Create and initialize a new association-handle.
 144  *  channel  : iochannel for the current line.
 145  *  link     : communications channel.
 146  * Returns: 0 or a new association handle.
 147  */
 148 association *create_association(IOCHAN channel, COMSTACK link,
 149                                 const char *apdufile)
 150 {
 151     association *anew;
 152
 153     if (!logbits_set)
 154         get_logbits();
 155     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 156         return 0;
 157     anew->init = 0;
 158     anew->version = 0;
 159     anew->last_control = 0;
 160     anew->client_chan = channel;
 161     anew->client_link = link;
 162     anew->cs_get_mask = 0;
 163     anew->cs_put_mask = 0;
 164     anew->cs_accept_mask = 0;
 165     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 166         !(anew->encode = odr_createmem(ODR_ENCODE)))
 167         return 0;
 168     if (apdufile && *apdufile)
 169     {
 170         FILE *f;
 171
 172         if (!(anew->print = odr_createmem(ODR_PRINT)))
 173             return 0;
 174         if (*apdufile == '@')
 175         {
 176             odr_setprint(anew->print, yaz_log_file());
 177         }
 178         else if (*apdufile != '-')
 179         {
 180             char filename[256];
 181             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 182             if (!(f = fopen(filename, "w")))
 183             {
 184                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 185                 return 0;
 186             }
 187             setvbuf(f, 0, _IONBF, 0);
 188             odr_setprint(anew->print, f);
 189         }
 190     }
 191     else
 192         anew->print = 0;
 193     anew->input_buffer = 0;
 194     anew->input_buffer_len = 0;
 195     anew->backend = 0;
 196     anew->state = ASSOC_NEW;
 197     request_initq(&anew->incoming);
 198     request_initq(&anew->outgoing);
 199     anew->proto = cs_getproto(link);
 200     anew->server = 0;
 201     return anew;
 202 }
 203
 204 /*
 205  * Free association and release resources.
 206  */
 207 void destroy_association(association *h)
 208 {
 209     statserv_options_block *cb = statserv_getcontrol();
 210     request *req;
 211
 212     xfree(h->init);
 213     odr_destroy(h->decode);
 214     odr_destroy(h->encode);
 215     if (h->print)
 216         odr_destroy(h->print);
 217     if (h->input_buffer)
 218     xfree(h->input_buffer);
 219     if (h->backend)
 220         (*cb->bend_close)(h->backend);
 221     while ((req = request_deq(&h->incoming)))
 222         request_release(req);
 223     while ((req = request_deq(&h->outgoing)))
 224         request_release(req);
 225     request_delq(&h->incoming);
 226     request_delq(&h->outgoing);
 227     xfree(h);
 228     xmalloc_trav("session closed");
 229 }
 230
 231 static void do_close_req(association *a, int reason, char *message,
 232                          request *req)
 233 {
 234     Z_APDU *apdu = zget_APDU(a->encode, Z_APDU_close);
 235     Z_Close *cls = apdu->u.close;
 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         *cls->closeReason = reason;
 245         cls->diagnosticInformation = message;
 246         process_z_response(a, req, apdu);
 247         iochan_settimeout(a->client_chan, 20);
 248     }
 249     else
 250     {
 251         request_release(req);
 252         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 253         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 254         a->cs_put_mask = 0;
 255     }
 256     a->state = ASSOC_DEAD;
 257 }
 258
 259 static void do_close(association *a, int reason, char *message)
 260 {
 261     request *req = request_get(&a->outgoing);
 262     do_close_req(a, reason, message, req);
 263 }
 264
 265
 266 int ir_read(IOCHAN h, int event)
 267 {
 268     association *assoc = (association *)iochan_getdata(h);
 269     COMSTACK conn = assoc->client_link;
 270     request *req;
 271
 272     if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 273     {
 274         /* We aren't speaking to this fellow */
 275         if (assoc->state == ASSOC_DEAD)
 276         {
 277             yaz_log(log_session, "Connection closed - end of session");
 278             cs_close(conn);
 279             destroy_association(assoc);
 280             iochan_destroy(h);
 281             return 0;
 282         }
 283         assoc->cs_get_mask = EVENT_INPUT;
 284
 285         do
 286         {
 287             int res = cs_get(conn, &assoc->input_buffer,
 288                              &assoc->input_buffer_len);
 289             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 290             {
 291                 yaz_log(log_session, "Connection error: %s res=%d",
 292                         cs_errmsg(cs_errno(conn)), res);
 293                 req = request_get(&assoc->incoming); /* get a new request */
 294                 do_close_req(assoc, Z_Close_protocolError,
 295                              "Incoming package too large", req);
 296                 return 0;
 297             }
 298             else if (res <= 0)
 299             {
 300                 assoc->state = ASSOC_DEAD;
 301                 yaz_log(log_session, "Connection closed by client");
 302                 return 0;
 303             }
 304             else if (res == 1) /* incomplete read - wait for more  */
 305             {
 306                 if (conn->io_pending & CS_WANT_WRITE)
 307                     assoc->cs_get_mask |= EVENT_OUTPUT;
 308                 iochan_setflag(h, assoc->cs_get_mask);
 309                 return 0;
 310             }
 311             /* we got a complete PDU. Let's decode it */
 312             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 313                     assoc->input_buffer[0] & 0xff,
 314                     assoc->input_buffer[1] & 0xff,
 315                     assoc->input_buffer[2] & 0xff);
 316             req = request_get(&assoc->incoming); /* get a new request */
 317             odr_reset(assoc->decode);
 318             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 319             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 320             {
 321                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 322                         "[near byte %ld] ",
 323                         odr_errmsg(odr_geterror(assoc->decode)),
 324                         odr_getelement(assoc->decode),
 325                         (long) odr_offset(assoc->decode));
 326                 if (assoc->decode->error != OHTTP)
 327                 {
 328                     yaz_log(YLOG_WARN, "PDU dump:");
 329                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 330                     request_release(req);
 331                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 332                 }
 333                 else
 334                 {
 335                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 336                     assoc->state = ASSOC_DEAD;
 337                     process_gdu_response(assoc, req, p);
 338                 }
 339                 return 0;
 340             }
 341             req->request_mem = odr_extract_mem(assoc->decode);
 342             if (assoc->print)
 343             {
 344                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 345                     yaz_log(YLOG_WARN, "ODR print error: %s",
 346                             odr_errmsg(odr_geterror(assoc->print)));
 347                 odr_reset(assoc->print);
 348             }
 349             request_enq(&assoc->incoming, req);
 350         }
 351         while (cs_more(conn));
 352     }
 353     return 1;
 354 }
 355
 356 /*
 357  * This is where PDUs from the client are read and the further
 358  * processing is initiated. Flow of control moves down through the
 359  * various process_* functions below, until the encoded result comes back up
 360  * to the output handler in here.
 361  *
 362  *  h     : the I/O channel that has an outstanding event.
 363  *  event : the current outstanding event.
 364  */
 365 void ir_session(IOCHAN h, int event)
 366 {
 367     int res;
 368     association *assoc = (association *)iochan_getdata(h);
 369     COMSTACK conn = assoc->client_link;
 370     request *req;
 371
 372     assert(h && conn && assoc);
 373     if (event == EVENT_TIMEOUT)
 374     {
 375         if (assoc->state != ASSOC_UP)
 376         {
 377             yaz_log(log_session, "Timeout. Closing connection");
 378             /* do we need to lod this at all */
 379             cs_close(conn);
 380             destroy_association(assoc);
 381             iochan_destroy(h);
 382         }
 383         else
 384         {
 385             yaz_log(log_sessiondetail, "Timeout. Sending Z39.50 Close");
 386             do_close(assoc, Z_Close_lackOfActivity, 0);
 387         }
 388         return;
 389     }
 390     if (event & assoc->cs_accept_mask)
 391     {
 392         if (!cs_accept(conn))
 393         {
 394             yaz_log(YLOG_WARN, "accept failed");
 395             destroy_association(assoc);
 396             iochan_destroy(h);
 397             return;
 398         }
 399         iochan_clearflag(h, EVENT_OUTPUT);
 400         if (conn->io_pending)
 401         {   /* cs_accept didn't complete */
 402             assoc->cs_accept_mask =
 403                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 404                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 405
 406             iochan_setflag(h, assoc->cs_accept_mask);
 407         }
 408         else
 409         {   /* cs_accept completed. Prepare for reading (cs_get) */
 410             assoc->cs_accept_mask = 0;
 411             assoc->cs_get_mask = EVENT_INPUT;
 412             iochan_setflag(h, assoc->cs_get_mask);
 413         }
 414         return;
 415     }
 416     if (event & assoc->cs_get_mask) /* input */
 417     {
 418         if (!ir_read(h, event))
 419             return;
 420         req = request_head(&assoc->incoming);
 421         if (req->state == REQUEST_IDLE)
 422         {
 423             request_deq(&assoc->incoming);
 424             process_gdu_request(assoc, req);
 425         }
 426     }
 427     if (event & assoc->cs_put_mask)
 428     {
 429         request *req = request_head(&assoc->outgoing);
 430
 431         assoc->cs_put_mask = 0;
 432         yaz_log(YLOG_DEBUG, "ir_session (output)");
 433         req->state = REQUEST_PENDING;
 434         switch (res = cs_put(conn, req->response, req->len_response))
 435         {
 436         case -1:
 437             yaz_log(log_sessiondetail, "Connection closed by client");
 438             cs_close(conn);
 439             destroy_association(assoc);
 440             iochan_destroy(h);
 441             break;
 442         case 0: /* all sent - release the request structure */
 443             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 444 #if 0
 445             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 446                     req->response);
 447 #endif
 448             request_deq(&assoc->outgoing);
 449             request_release(req);
 450             if (!request_head(&assoc->outgoing))
 451             {   /* restore mask for cs_get operation ... */
 452                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 453                 iochan_setflag(h, assoc->cs_get_mask);
 454                 if (assoc->state == ASSOC_DEAD)
 455                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 456             }
 457             else
 458             {
 459                 assoc->cs_put_mask = EVENT_OUTPUT;
 460             }
 461             break;
 462         default:
 463             if (conn->io_pending & CS_WANT_WRITE)
 464                 assoc->cs_put_mask |= EVENT_OUTPUT;
 465             if (conn->io_pending & CS_WANT_READ)
 466                 assoc->cs_put_mask |= EVENT_INPUT;
 467             iochan_setflag(h, assoc->cs_put_mask);
 468         }
 469     }
 470     if (event & EVENT_EXCEPT)
 471     {
 472         if (assoc->state != ASSOC_DEAD)
 473             yaz_log(YLOG_WARN, "ir_session (exception)");
 474         cs_close(conn);
 475         destroy_association(assoc);
 476         iochan_destroy(h);
 477     }
 478 }
 479
 480 static int process_z_request(association *assoc, request *req, char **msg);
 481
 482
 483 static void assoc_init_reset(association *assoc, const char *peer_name1)
 484 {
 485     const char *peer_name2 = cs_addrstr(assoc->client_link);
 486
 487     xfree(assoc->init);
 488     assoc->init = (bend_initrequest *) xmalloc(sizeof(*assoc->init));
 489
 490     assoc->init->stream = assoc->encode;
 491     assoc->init->print = assoc->print;
 492     assoc->init->auth = 0;
 493     assoc->init->referenceId = 0;
 494     assoc->init->implementation_version = 0;
 495     assoc->init->implementation_id = 0;
 496     assoc->init->implementation_name = 0;
 497     assoc->init->query_charset = 0;
 498     assoc->init->records_in_same_charset = 0;
 499     assoc->init->bend_sort = NULL;
 500     assoc->init->bend_search = NULL;
 501     assoc->init->bend_present = NULL;
 502     assoc->init->bend_esrequest = NULL;
 503     assoc->init->bend_delete = NULL;
 504     assoc->init->bend_scan = NULL;
 505     assoc->init->bend_segment = NULL;
 506     assoc->init->bend_fetch = NULL;
 507     assoc->init->bend_explain = NULL;
 508     assoc->init->bend_srw_scan = NULL;
 509     assoc->init->bend_srw_update = NULL;
 510     assoc->init->named_result_sets = 0;
 511
 512     assoc->init->charneg_request = NULL;
 513     assoc->init->charneg_response = NULL;
 514
 515     assoc->init->decode = assoc->decode;
 516
 517     assoc->init->peer_name = (char *)
 518         odr_malloc(assoc->encode,
 519                    (peer_name1 ? strlen(peer_name1) : 0)
 520                    + 4 + strlen(peer_name2));
 521     strcpy(assoc->init->peer_name, "");
 522     if (peer_name1)
 523     {
 524         strcat(assoc->init->peer_name, peer_name1);
 525         strcat(assoc->init->peer_name, ", ");
 526     }
 527     strcat(assoc->init->peer_name, peer_name2);
 528
 529     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 530 }
 531
 532 static int srw_bend_init(association *assoc, Z_HTTP_Header *headers,
 533                          Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 534 {
 535     statserv_options_block *cb = statserv_getcontrol();
 536     if (!assoc->init)
 537     {
 538         const char *encoding = "UTF-8";
 539         Z_External *ce;
 540         bend_initresult *binitres;
 541
 542         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 543         assoc_init_reset(assoc, z_HTTP_header_lookup(headers, "X-Forwarded-For"));
 544
 545         if (sr->username)
 546         {
 547             Z_IdAuthentication *auth = (Z_IdAuthentication *)
 548                 odr_malloc(assoc->decode, sizeof(*auth));
 549             size_t len;
 550
 551             len = strlen(sr->username) + 1;
 552             if (sr->password)
 553                 len += strlen(sr->password) + 2;
 554             yaz_log(log_requestdetail, "username=%s password-len=%ld",
 555                     sr->username, (long)
 556                     (sr->password ? strlen(sr->password) : 0));
 557             auth->which = Z_IdAuthentication_open;
 558             auth->u.open = (char *) odr_malloc(assoc->decode, len);
 559             strcpy(auth->u.open, sr->username);
 560             if (sr->password && *sr->password)
 561             {
 562                 strcat(auth->u.open, "/");
 563                 strcat(auth->u.open, sr->password);
 564             }
 565             assoc->init->auth = auth;
 566         }
 567
 568 #if 1
 569         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 570         assoc->init->charneg_request = ce->u.charNeg3;
 571 #endif
 572         assoc->backend = 0;
 573         if (!(binitres = (*cb->bend_init)(assoc->init)))
 574         {
 575             assoc->state = ASSOC_DEAD;
 576             yaz_add_srw_diagnostic(assoc->encode, d, num,
 577                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 578             return 0;
 579         }
 580         assoc->backend = binitres->handle;
 581         assoc->init->auth = 0;
 582         if (binitres->errcode)
 583         {
 584             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 585             assoc->state = ASSOC_DEAD;
 586             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 587                                    binitres->errstring);
 588             return 0;
 589         }
 590         return 1;
 591     }
 592     return 1;
 593 }
 594
 595 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 596 {
 597 #if YAZ_HAVE_XML2
 598     yaz_record_conv_t rc = 0;
 599     const char *match_schema = 0;
 600     Odr_oid *match_syntax = 0;
 601
 602     if (assoc->server)
 603     {
 604         int r;
 605         const char *input_schema = yaz_get_esn(rr->comp);
 606         Odr_oid *input_syntax_raw = rr->request_format;
 607
 608         const char *backend_schema = 0;
 609         Odr_oid *backend_syntax = 0;
 610
 611         r = yaz_retrieval_request(assoc->server->retrieval,
 612                                   input_schema,
 613                                   input_syntax_raw,
 614                                   &match_schema,
 615                                   &match_syntax,
 616                                   &rc,
 617                                   &backend_schema,
 618                                   &backend_syntax);
 619         if (r == -1) /* error ? */
 620         {
 621             const char *details = yaz_retrieval_get_error(
 622                 assoc->server->retrieval);
 623
 624             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 625             if (details)
 626                 rr->errstring = odr_strdup(rr->stream, details);
 627             return -1;
 628         }
 629         else if (r == 1 || r == 3)
 630         {
 631             const char *details = input_schema;
 632             rr->errcode =
 633                 YAZ_BIB1_SPECIFIED_ELEMENT_SET_NAME_NOT_VALID_FOR_SPECIFIED_;
 634             if (details)
 635                 rr->errstring = odr_strdup(rr->stream, details);
 636             return -1;
 637         }
 638         else if (r == 2)
 639         {
 640             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 641             if (input_syntax_raw)
 642             {
 643                 char oidbuf[OID_STR_MAX];
 644                 oid_oid_to_dotstring(input_syntax_raw, oidbuf);
 645                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 646             }
 647             return -1;
 648         }
 649         if (backend_schema)
 650         {
 651             yaz_set_esn(&rr->comp, backend_schema, odr_getmem(rr->stream));
 652         }
 653         if (backend_syntax)
 654             rr->request_format = backend_syntax;
 655     }
 656     (*assoc->init->bend_fetch)(assoc->backend, rr);
 657     if (rc && rr->record && rr->errcode == 0)
 658     {   /* post conversion must take place .. */
 659         WRBUF output_record = wrbuf_alloc();
 660         int r = 1;
 661         const char *details = 0;
 662         if (rr->len > 0)
 663         {
 664             r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 665             if (r)
 666                 details = yaz_record_conv_get_error(rc);
 667         }
 668         else if (rr->len == -1 && rr->output_format &&
 669                  !oid_oidcmp(rr->output_format, yaz_oid_recsyn_opac))
 670         {
 671             r = yaz_record_conv_opac_record(
 672                 rc, (Z_OPACRecord *) rr->record, output_record);
 673             if (r)
 674                 details = yaz_record_conv_get_error(rc);
 675         }
 676         if (r == 0 && match_syntax &&
 677             !oid_oidcmp(match_syntax, yaz_oid_recsyn_opac))
 678         {
 679             yaz_marc_t mt = yaz_marc_create();
 680             Z_OPACRecord *opac = 0;
 681             if (yaz_xml_to_opac(mt, wrbuf_buf(output_record),
 682                                 wrbuf_len(output_record),
 683                                 &opac, 0 /* iconv */, rr->stream->mem, 0)
 684                 && opac)
 685             {
 686                 rr->len = -1;
 687                 rr->record = (char *) opac;
 688             }
 689             else
 690             {
 691                 details = "XML to OPAC conversion failed";
 692                 r = 1;
 693             }
 694             yaz_marc_destroy(mt);
 695         }
 696         else if (r == 0)
 697         {
 698             rr->len = wrbuf_len(output_record);
 699             rr->record = (char *) odr_malloc(rr->stream, rr->len);
 700             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 701         }
 702         if (r)
 703         {
 704             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 705             rr->surrogate_flag = 1;
 706             if (details)
 707                 rr->errstring = odr_strdup(rr->stream, details);
 708         }
 709         wrbuf_destroy(output_record);
 710     }
 711     if (match_syntax)
 712         rr->output_format = match_syntax;
 713     if (match_schema)
 714         rr->schema = odr_strdup(rr->stream, match_schema);
 715 #else
 716     (*assoc->init->bend_fetch)(assoc->backend, rr);
 717 #endif
 718     return 0;
 719 }
 720
 721 static int srw_bend_fetch(association *assoc, int pos,
 722                           Z_SRW_searchRetrieveRequest *srw_req,
 723                           Z_SRW_record *record,
 724                           const char **addinfo, int *last_in_set)
 725 {
 726     bend_fetch_rr rr;
 727     ODR o = assoc->encode;
 728
 729     rr.setname = "default";
 730     rr.number = pos;
 731     rr.referenceId = 0;
 732     rr.request_format = odr_oiddup(assoc->decode, yaz_oid_recsyn_xml);
 733
 734     rr.comp = (Z_RecordComposition *)
 735             odr_malloc(assoc->decode, sizeof(*rr.comp));
 736     rr.comp->which = Z_RecordComp_complex;
 737     rr.comp->u.complex = (Z_CompSpec *)
 738             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 739     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 740         odr_malloc(assoc->encode, sizeof(bool_t));
 741     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 742     rr.comp->u.complex->num_dbSpecific = 0;
 743     rr.comp->u.complex->dbSpecific = 0;
 744     rr.comp->u.complex->num_recordSyntax = 0;
 745     rr.comp->u.complex->recordSyntax = 0;
 746
 747     rr.comp->u.complex->generic = (Z_Specification *)
 748             odr_malloc(assoc->decode, sizeof(Z_Specification));
 749
 750     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 751     rr.comp->u.complex->generic->which = Z_Schema_uri;
 752     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 753
 754     /* ESN = recordSchema if recordSchema is present */
 755     rr.comp->u.complex->generic->elementSpec = 0;
 756     if (srw_req->recordSchema)
 757     {
 758         rr.comp->u.complex->generic->elementSpec =
 759             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 760         rr.comp->u.complex->generic->elementSpec->which =
 761             Z_ElementSpec_elementSetName;
 762         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 763             srw_req->recordSchema;
 764     }
 765
 766     rr.stream = assoc->encode;
 767     rr.print = assoc->print;
 768
 769     rr.basename = 0;
 770     rr.len = 0;
 771     rr.record = 0;
 772     rr.last_in_set = 0;
 773     rr.errcode = 0;
 774     rr.errstring = 0;
 775     rr.surrogate_flag = 0;
 776     rr.schema = srw_req->recordSchema;
 777
 778     if (!assoc->init->bend_fetch)
 779         return 1;
 780
 781     retrieve_fetch(assoc, &rr);
 782
 783     *last_in_set = rr.last_in_set;
 784
 785     if (rr.errcode && rr.surrogate_flag)
 786     {
 787         int code = yaz_diag_bib1_to_srw(rr.errcode);
 788         yaz_mk_sru_surrogate(o, record, pos, code, rr.errstring);
 789         return 0;
 790     }
 791     else if (rr.len >= 0)
 792     {
 793         record->recordData_buf = rr.record;
 794         record->recordData_len = rr.len;
 795         record->recordPosition = odr_intdup(o, pos);
 796         record->recordSchema = odr_strdup_null(
 797             o, rr.schema ? rr.schema : srw_req->recordSchema);
 798     }
 799     if (rr.errcode)
 800     {
 801         *addinfo = rr.errstring;
 802         return rr.errcode;
 803     }
 804     return 0;
 805 }
 806
 807 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 808                    Z_Query *query_result, char **sortkeys_p)
 809 {
 810     /* have a CQL query and  CQL to PQF transform .. */
 811     CQL_parser cp = cql_parser_create();
 812     int r;
 813     int srw_errcode = 0;
 814     const char *add = 0;
 815     WRBUF rpn_buf = wrbuf_alloc();
 816
 817     *sortkeys_p = 0;
 818     r = cql_parser_string(cp, cql);
 819     if (r)
 820     {
 821         srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 822     }
 823     if (!r)
 824     {
 825         struct cql_node *cn = cql_parser_result(cp);
 826
 827         /* Syntax OK */
 828         r = cql_transform(ct, cn, wrbuf_vp_puts, rpn_buf);
 829         if (r)
 830             srw_errcode = cql_transform_error(ct, &add);
 831         else
 832         {
 833             char out[100];
 834             int r = cql_sortby_to_sortkeys_buf(cn, out, sizeof(out)-1);
 835
 836             if (r == 0)
 837             {
 838                 if (*out)
 839                     yaz_log(log_requestdetail, "srw_sortKeys '%s'", out);
 840                 *sortkeys_p = odr_strdup(odr, out);
 841             }
 842             else
 843             {
 844                 yaz_log(log_requestdetail, "failed to create srw_sortKeys");
 845                 srw_errcode = YAZ_SRW_UNSUPP_SORT_TYPE;
 846             }
 847         }
 848     }
 849     if (!r)
 850     {
 851         /* Syntax & transform OK. */
 852         /* Convert PQF string to Z39.50 to RPN query struct */
 853         YAZ_PQF_Parser pp = yaz_pqf_create();
 854         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, wrbuf_cstr(rpn_buf));
 855         if (!rpnquery)
 856         {
 857             size_t off;
 858             const char *pqf_msg;
 859             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 860             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 861                     pqf_msg, code);
 862             srw_errcode = YAZ_SRW_QUERY_SYNTAX_ERROR;
 863         }
 864         else
 865         {
 866             query_result->which = Z_Query_type_1;
 867             query_result->u.type_1 = rpnquery;
 868         }
 869         yaz_pqf_destroy(pp);
 870     }
 871     cql_parser_destroy(cp);
 872     wrbuf_destroy(rpn_buf);
 873     return srw_errcode;
 874 }
 875
 876 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 877                         Z_AttributesPlusTerm *result)
 878 {
 879     Z_Query query;
 880     Z_RPNQuery *rpn;
 881     char *sortkeys = 0;
 882     int srw_error = cql2pqf(odr, cql, ct, &query, &sortkeys);
 883     if (srw_error)
 884         return srw_error;
 885     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 886         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* bad query type */
 887     rpn = query.u.type_1;
 888     if (!rpn->RPNStructure)
 889         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be structure */
 890     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 891         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be simple */
 892     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 893         return YAZ_SRW_QUERY_SYNTAX_ERROR; /* must be be attributes + term */
 894     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 895            sizeof(*result));
 896     return 0;
 897 }
 898
 899
 900 static int ccl2pqf(ODR odr, const Odr_oct *ccl, CCL_bibset bibset,
 901                    bend_search_rr *bsrr)
 902 {
 903     char *ccl0;
 904     struct ccl_rpn_node *node;
 905     int errcode, pos;
 906
 907     ccl0 = odr_strdupn(odr, (char*) ccl->buf, ccl->len);
 908     if ((node = ccl_find_str(bibset, ccl0, &errcode, &pos)) == 0)
 909     {
 910         bsrr->errstring = (char*) ccl_err_msg(errcode);
 911         return YAZ_SRW_QUERY_SYNTAX_ERROR;    /* Query syntax error */
 912     }
 913
 914     bsrr->query->which = Z_Query_type_1;
 915     bsrr->query->u.type_1 = ccl_rpn_query(odr, node);
 916     return 0;
 917 }
 918
 919 static void srw_bend_search(association *assoc,
 920                             Z_HTTP_Header *headers,
 921                             Z_SRW_PDU *sr,
 922                             Z_SRW_PDU *res,
 923                             int *http_code)
 924 {
 925     Z_SRW_searchRetrieveResponse *srw_res = res->u.response;
 926     int srw_error = 0;
 927     Z_External *ext;
 928     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 929
 930     *http_code = 200;
 931     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 932     srw_bend_init(assoc, headers,
 933                   &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 934     if (srw_res->num_diagnostics == 0 && assoc->init)
 935     {
 936         bend_search_rr rr;
 937         rr.setname = "default";
 938         rr.replace_set = 1;
 939         rr.num_bases = 1;
 940         rr.basenames = &srw_req->database;
 941         rr.referenceId = 0;
 942         rr.srw_sortKeys = 0;
 943         rr.srw_setname = 0;
 944         rr.srw_setnameIdleTime = 0;
 945         rr.estimated_hit_count = 0;
 946         rr.partial_resultset = 0;
 947         rr.query = (Z_Query *) odr_malloc(assoc->decode, sizeof(*rr.query));
 948         rr.query->u.type_1 = 0;
 949         rr.extra_args = sr->extra_args;
 950         rr.extra_response_data = 0;
 951         rr.present_number = srw_req->maximumRecords ?
 952             *srw_req->maximumRecords : 0;
 953
 954         if (!srw_req->queryType || !strcmp(srw_req->queryType, "cql"))
 955         {
 956             if (assoc->server && assoc->server->cql_transform)
 957             {
 958                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query,
 959                                           assoc->server->cql_transform,
 960                                           rr.query,
 961                                           &rr.srw_sortKeys);
 962
 963                 if (srw_errcode)
 964                 {
 965                     yaz_add_srw_diagnostic(assoc->encode,
 966                                            &srw_res->diagnostics,
 967                                            &srw_res->num_diagnostics,
 968                                            srw_errcode, 0);
 969                 }
 970             }
 971             else
 972             {
 973                 /* CQL query to backend. Wrap it - Z39.50 style */
 974                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 975                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 976                                                         "1.2.840.10003.16.2");
 977                 ext->indirect_reference = 0;
 978                 ext->descriptor = 0;
 979                 ext->which = Z_External_CQL;
 980                 ext->u.cql = srw_req->query;
 981
 982                 rr.query->which = Z_Query_type_104;
 983                 rr.query->u.type_104 =  ext;
 984             }
 985         }
 986         else if (!strcmp(srw_req->queryType, "pqf"))
 987         {
 988             Z_RPNQuery *RPNquery;
 989             YAZ_PQF_Parser pqf_parser;
 990
 991             pqf_parser = yaz_pqf_create();
 992
 993             RPNquery = yaz_pqf_parse(pqf_parser, assoc->decode, srw_req->query);
 994             if (!RPNquery)
 995             {
 996                 const char *pqf_msg;
 997                 size_t off;
 998                 int code = yaz_pqf_error(pqf_parser, &pqf_msg, &off);
 999                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
1000                         code, pqf_msg, (long) off);
1001                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
1002             }
1003
1004             rr.query->which = Z_Query_type_1;
1005             rr.query->u.type_1 =  RPNquery;
1006
1007             yaz_pqf_destroy(pqf_parser);
1008         }
1009         else
1010         {
1011             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1012                                    &srw_res->num_diagnostics,
1013                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
1014         }
1015         if (rr.query->u.type_1)
1016         {
1017             rr.stream = assoc->encode;
1018             rr.decode = assoc->decode;
1019             rr.print = assoc->print;
1020             if (srw_req->sort.sortKeys)
1021                 rr.srw_sortKeys = odr_strdup(assoc->encode,
1022                                              srw_req->sort.sortKeys);
1023             rr.association = assoc;
1024             rr.hits = 0;
1025             rr.errcode = 0;
1026             rr.errstring = 0;
1027             rr.search_info = 0;
1028             rr.search_input = 0;
1029
1030             if (srw_req->facetList)
1031                 yaz_oi_set_facetlist(&rr.search_input, assoc->encode,
1032                                      srw_req->facetList);
1033
1034             yaz_log_zquery_level(log_requestdetail,rr.query);
1035
1036             (assoc->init->bend_search)(assoc->backend, &rr);
1037             if (rr.errcode)
1038             {
1039                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1040                 {
1041                     *http_code = 404;
1042                 }
1043                 else
1044                 {
1045                     srw_error = yaz_diag_bib1_to_srw(rr.errcode);
1046                     yaz_add_srw_diagnostic(assoc->encode,
1047                                            &srw_res->diagnostics,
1048                                            &srw_res->num_diagnostics,
1049                                            srw_error, rr.errstring);
1050                 }
1051             }
1052             else
1053             {
1054                 int number = srw_req->maximumRecords ?
1055                     odr_int_to_int(*srw_req->maximumRecords) : 0;
1056                 int start = srw_req->startRecord ?
1057                     odr_int_to_int(*srw_req->startRecord) : 1;
1058
1059                 yaz_log(log_requestdetail, "Request to pack %d+%d out of "
1060                         ODR_INT_PRINTF,
1061                         start, number, rr.hits);
1062
1063                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
1064                 if (rr.srw_setname)
1065                 {
1066                     srw_res->resultSetId =
1067                         odr_strdup(assoc->encode, rr.srw_setname );
1068                     srw_res->resultSetIdleTime =
1069                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
1070                 }
1071
1072                 srw_res->facetList = yaz_oi_get_facetlist(&rr.search_info);
1073                 if (start > rr.hits || start < 1)
1074                 {
1075                     /* if hits<=0 and start=1 we don't return a diagnostic */
1076                     if (start != 1)
1077                         yaz_add_srw_diagnostic(
1078                             assoc->encode,
1079                             &srw_res->diagnostics, &srw_res->num_diagnostics,
1080                             YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1081                 }
1082                 else if (number > 0)
1083                 {
1084                     int i;
1085                     int ok = 1;
1086                     if (start + number > rr.hits)
1087                         number = odr_int_to_int(rr.hits) - start + 1;
1088
1089                     /* Call bend_present if defined */
1090                     if (assoc->init->bend_present)
1091                     {
1092                         bend_present_rr *bprr = (bend_present_rr*)
1093                             odr_malloc(assoc->decode, sizeof(*bprr));
1094                         bprr->setname = "default";
1095                         bprr->start = start;
1096                         bprr->number = number;
1097                         if (srw_req->recordSchema)
1098                         {
1099                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1100                                                                             sizeof(*bprr->comp));
1101                             bprr->comp->which = Z_RecordComp_simple;
1102                             bprr->comp->u.simple = (Z_ElementSetNames *)
1103                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1104                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1105                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1106                         }
1107                         else
1108                         {
1109                             bprr->comp = 0;
1110                         }
1111                         bprr->stream = assoc->encode;
1112                         bprr->referenceId = 0;
1113                         bprr->print = assoc->print;
1114                         bprr->association = assoc;
1115                         bprr->errcode = 0;
1116                         bprr->errstring = NULL;
1117                         (*assoc->init->bend_present)(assoc->backend, bprr);
1118
1119                         if (bprr->errcode)
1120                         {
1121                             srw_error = yaz_diag_bib1_to_srw(bprr->errcode);
1122                             yaz_add_srw_diagnostic(assoc->encode,
1123                                                    &srw_res->diagnostics,
1124                                                    &srw_res->num_diagnostics,
1125                                                    srw_error, bprr->errstring);
1126                             ok = 0;
1127                         }
1128                     }
1129
1130                     if (ok)
1131                     {
1132                         int j = 0;
1133                         int packing = Z_SRW_recordPacking_string;
1134                         if (srw_req->recordPacking)
1135                         {
1136                             packing =
1137                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1138                             if (packing == -1)
1139                                 packing = Z_SRW_recordPacking_string;
1140                         }
1141                         srw_res->records = (Z_SRW_record *)
1142                             odr_malloc(assoc->encode,
1143                                        number * sizeof(*srw_res->records));
1144
1145                         srw_res->extra_records = (Z_SRW_extra_record **)
1146                             odr_malloc(assoc->encode,
1147                                        number*sizeof(*srw_res->extra_records));
1148
1149                         for (i = 0; i<number; i++)
1150                         {
1151                             int errcode;
1152                             int last_in_set = 0;
1153                             const char *addinfo = 0;
1154
1155                             srw_res->records[j].recordPacking = packing;
1156                             srw_res->records[j].recordData_buf = 0;
1157                             srw_res->extra_records[j] = 0;
1158                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1159                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1160                                                      srw_res->records + j,
1161                                                      &addinfo, &last_in_set);
1162                             if (errcode)
1163                             {
1164                                 yaz_add_srw_diagnostic(assoc->encode,
1165                                                        &srw_res->diagnostics,
1166                                                        &srw_res->num_diagnostics,
1167                                                        yaz_diag_bib1_to_srw(errcode),
1168                                                        addinfo);
1169
1170                                 break;
1171                             }
1172                             if (srw_res->records[j].recordData_buf)
1173                                 j++;
1174                             if (last_in_set)
1175                                 break;
1176                         }
1177                         srw_res->num_records = j;
1178                         if (!j)
1179                             srw_res->records = 0;
1180                     }
1181                 }
1182                 if (rr.extra_response_data)
1183                 {
1184                     res->extraResponseData_buf = rr.extra_response_data;
1185                     res->extraResponseData_len = strlen(rr.extra_response_data);
1186                 }
1187                 if (strcmp(res->srw_version, "2.") > 0)
1188                 {
1189                     if (rr.estimated_hit_count)
1190                         srw_res->resultCountPrecision =
1191                             odr_strdup(assoc->encode, "estimate");
1192                     else if (rr.partial_resultset)
1193                         srw_res->resultCountPrecision =
1194                             odr_strdup(assoc->encode, "minimum");
1195                     else
1196                         srw_res->resultCountPrecision =
1197                             odr_strdup(assoc->encode, "exact");
1198                 }
1199                 else if (rr.estimated_hit_count || rr.partial_resultset)
1200                 {
1201                     yaz_add_srw_diagnostic(
1202                         assoc->encode,
1203                         &srw_res->diagnostics,
1204                         &srw_res->num_diagnostics,
1205                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1206                         0);
1207                 }
1208             }
1209         }
1210     }
1211     if (log_request)
1212     {
1213         WRBUF wr = wrbuf_alloc();
1214
1215         wrbuf_printf(wr, "SRWSearch %s ", srw_req->database);
1216         if (srw_res->num_diagnostics)
1217             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1218         else if (*http_code != 200)
1219             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1220         else if (srw_res->numberOfRecords)
1221         {
1222             wrbuf_printf(wr, "OK " ODR_INT_PRINTF,
1223                          (srw_res->numberOfRecords ?
1224                           *srw_res->numberOfRecords : 0));
1225         }
1226         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+%d",
1227                      (srw_res->resultSetId ?
1228                       srw_res->resultSetId : "-"),
1229                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1230                      srw_res->num_records);
1231         yaz_log(log_request, "%s %s: %s", wrbuf_cstr(wr), srw_req->queryType,
1232                 srw_req->query);
1233         wrbuf_destroy(wr);
1234     }
1235 }
1236
1237 static char *srw_bend_explain_default(bend_explain_rr *rr)
1238 {
1239 #if YAZ_HAVE_XML2
1240     xmlNodePtr ptr = (xmlNode *) rr->server_node_ptr;
1241     if (!ptr)
1242         return 0;
1243     for (ptr = ptr->children; ptr; ptr = ptr->next)
1244     {
1245         if (ptr->type != XML_ELEMENT_NODE)
1246             continue;
1247         if (!strcmp((const char *) ptr->name, "explain"))
1248         {
1249             int len;
1250             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1251             xmlChar *buf_out;
1252             char *content;
1253
1254             ptr = xmlCopyNode(ptr, 1);
1255
1256             xmlDocSetRootElement(doc, ptr);
1257
1258             xmlDocDumpMemory(doc, &buf_out, &len);
1259             content = (char*) odr_malloc(rr->stream, 1+len);
1260             memcpy(content, buf_out, len);
1261             content[len] = '\0';
1262
1263             xmlFree(buf_out);
1264             xmlFreeDoc(doc);
1265             rr->explain_buf = content;
1266             return 0;
1267         }
1268     }
1269 #endif
1270     return 0;
1271 }
1272
1273 static void srw_bend_explain(association *assoc,
1274                              Z_HTTP_Header *headers,
1275                              Z_SRW_PDU *sr,
1276                              Z_SRW_explainResponse *srw_res,
1277                              int *http_code)
1278 {
1279     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1280     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1281     srw_bend_init(assoc, headers,
1282                   &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1283     if (!assoc->init && srw_res->num_diagnostics == 0)
1284         *http_code = 404;
1285     if (assoc->init)
1286     {
1287         bend_explain_rr rr;
1288
1289         rr.stream = assoc->encode;
1290         rr.decode = assoc->decode;
1291         rr.print = assoc->print;
1292         rr.explain_buf = 0;
1293         rr.database = srw_req->database;
1294         if (assoc->server)
1295             rr.server_node_ptr = assoc->server->server_node_ptr;
1296         else
1297             rr.server_node_ptr = 0;
1298         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1299         if (assoc->init->bend_explain)
1300             (*assoc->init->bend_explain)(assoc->backend, &rr);
1301         else
1302             srw_bend_explain_default(&rr);
1303
1304         if (rr.explain_buf)
1305         {
1306             int packing = Z_SRW_recordPacking_string;
1307             if (srw_req->recordPacking)
1308             {
1309                 packing =
1310                     yaz_srw_str_to_pack(srw_req->recordPacking);
1311                 if (packing == -1)
1312                     packing = Z_SRW_recordPacking_string;
1313             }
1314             srw_res->record.recordSchema = rr.schema;
1315             srw_res->record.recordPacking = packing;
1316             srw_res->record.recordData_buf = rr.explain_buf;
1317             srw_res->record.recordData_len = strlen(rr.explain_buf);
1318             srw_res->record.recordPosition = 0;
1319             *http_code = 200;
1320         }
1321     }
1322 }
1323
1324 static void srw_bend_scan(association *assoc,
1325                           Z_HTTP_Header *headers,
1326                           Z_SRW_PDU *sr,
1327                           Z_SRW_PDU *res,
1328                           int *http_code)
1329 {
1330     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1331     Z_SRW_scanResponse *srw_res = res->u.scan_response;
1332     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1333
1334     *http_code = 200;
1335     srw_bend_init(assoc, headers,
1336                   &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1337     if (srw_res->num_diagnostics == 0 && assoc->init)
1338     {
1339         int step_size = 0;
1340         struct scan_entry *save_entries;
1341
1342         bend_scan_rr *bsrr = (bend_scan_rr *)
1343             odr_malloc(assoc->encode, sizeof(*bsrr));
1344         bsrr->num_bases = 1;
1345         bsrr->basenames = &srw_req->database;
1346
1347         bsrr->num_entries = srw_req->maximumTerms ?
1348             odr_int_to_int(*srw_req->maximumTerms) : 10;
1349         bsrr->term_position = srw_req->responsePosition ?
1350             odr_int_to_int(*srw_req->responsePosition) : 1;
1351
1352         bsrr->errcode = 0;
1353         bsrr->errstring = 0;
1354         bsrr->referenceId = 0;
1355         bsrr->stream = assoc->encode;
1356         bsrr->print = assoc->print;
1357         bsrr->step_size = &step_size;
1358         bsrr->entries = 0;
1359         bsrr->setname = 0;
1360         bsrr->extra_args = sr->extra_args;
1361         bsrr->extra_response_data = 0;
1362
1363         if (bsrr->num_entries > 0)
1364         {
1365             int i;
1366             bsrr->entries = (struct scan_entry *)
1367                 odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1368                            bsrr->num_entries);
1369             for (i = 0; i<bsrr->num_entries; i++)
1370             {
1371                 bsrr->entries[i].term = 0;
1372                 bsrr->entries[i].occurrences = 0;
1373                 bsrr->entries[i].errcode = 0;
1374                 bsrr->entries[i].errstring = 0;
1375                 bsrr->entries[i].display_term = 0;
1376             }
1377         }
1378         save_entries = bsrr->entries;  /* save it so we can compare later */
1379
1380         if (srw_req->queryType && !strcmp(srw_req->queryType, "pqf") &&
1381             assoc->init->bend_scan)
1382         {
1383             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1384
1385             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1386                                       &bsrr->attributeset,
1387                                       srw_req->scanClause);
1388             yaz_pqf_destroy(pqf_parser);
1389             bsrr->scanClause = 0;
1390             ((int (*)(void *, bend_scan_rr *))
1391              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1392         }
1393         else if ((!srw_req->queryType || !strcmp(srw_req->queryType, "cql"))
1394                  && assoc->init->bend_scan && assoc->server
1395                  && assoc->server->cql_transform)
1396         {
1397             int srw_error;
1398             bsrr->scanClause = 0;
1399             bsrr->attributeset = 0;
1400             bsrr->term = (Z_AttributesPlusTerm *)
1401                 odr_malloc(assoc->decode, sizeof(*bsrr->term));
1402             srw_error = cql2pqf_scan(assoc->encode,
1403                                      srw_req->scanClause,
1404                                      assoc->server->cql_transform,
1405                                      bsrr->term);
1406             if (srw_error)
1407                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1408                                        &srw_res->num_diagnostics,
1409                                        srw_error, 0);
1410             else
1411             {
1412                 ((int (*)(void *, bend_scan_rr *))
1413                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1414             }
1415         }
1416         else if ((!srw_req->queryType || !strcmp(srw_req->queryType, "cql"))
1417                  && assoc->init->bend_srw_scan)
1418         {
1419             bsrr->term = 0;
1420             bsrr->attributeset = 0;
1421             bsrr->scanClause = srw_req->scanClause;
1422             ((int (*)(void *, bend_scan_rr *))
1423              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1424         }
1425         else
1426         {
1427             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1428                                    &srw_res->num_diagnostics,
1429                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1430         }
1431         if (bsrr->extra_response_data)
1432         {
1433             res->extraResponseData_buf = bsrr->extra_response_data;
1434             res->extraResponseData_len = strlen(bsrr->extra_response_data);
1435         }
1436         if (bsrr->errcode)
1437         {
1438             int srw_error;
1439             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1440             {
1441                 *http_code = 404;
1442                 return;
1443             }
1444             srw_error = yaz_diag_bib1_to_srw(bsrr->errcode);
1445
1446             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1447                                    &srw_res->num_diagnostics,
1448                                    srw_error, bsrr->errstring);
1449         }
1450         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1451         {
1452             int i;
1453             srw_res->terms = (Z_SRW_scanTerm*)
1454                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1455                            bsrr->num_entries);
1456
1457             srw_res->num_terms =  bsrr->num_entries;
1458             for (i = 0; i<bsrr->num_entries; i++)
1459             {
1460                 Z_SRW_scanTerm *t = srw_res->terms + i;
1461                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1462                 t->numberOfRecords =
1463                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1464                 t->displayTerm = 0;
1465                 if (save_entries == bsrr->entries &&
1466                     bsrr->entries[i].display_term)
1467                 {
1468                     /* the entries was _not_ set by the handler. So it's
1469                        safe to test for new member display_term. It is
1470                        NULL'ed by us.
1471                     */
1472                     t->displayTerm = odr_strdup(assoc->encode,
1473                                                 bsrr->entries[i].display_term);
1474                 }
1475                 t->whereInList = 0;
1476             }
1477         }
1478     }
1479     if (log_request)
1480     {
1481         WRBUF wr = wrbuf_alloc();
1482         wrbuf_printf(wr, "SRWScan %s ", srw_req->database);
1483
1484         if (srw_res->num_diagnostics)
1485             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1486         else if (srw_res->num_terms)
1487             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1488         else
1489             wrbuf_printf(wr, "OK - - ");
1490
1491         wrbuf_printf(wr, ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
1492                      (srw_req->responsePosition ?
1493                       *srw_req->responsePosition : 1),
1494                      (srw_req->maximumTerms ?
1495                       *srw_req->maximumTerms : 1));
1496         /* there is no step size in SRU/W ??? */
1497         wrbuf_printf(wr, "%s: %s ", srw_req->queryType, srw_req->scanClause);
1498         yaz_log(log_request, "%s ", wrbuf_cstr(wr) );
1499         wrbuf_destroy(wr);
1500     }
1501
1502 }
1503
1504 static void srw_bend_update(association *assoc,
1505                             Z_HTTP_Header *headers,
1506                             Z_SRW_PDU *sr,
1507                             Z_SRW_updateResponse *srw_res,
1508                             int *http_code)
1509 {
1510     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1511     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1512     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1513     srw_bend_init(assoc, headers,
1514                   &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1515     if (!assoc->init && srw_res->num_diagnostics == 0)
1516         *http_code = 404;
1517     if (assoc->init)
1518     {
1519         bend_update_rr rr;
1520         Z_SRW_extra_record *extra = srw_req->extra_record;
1521
1522         rr.stream = assoc->encode;
1523         rr.print = assoc->print;
1524         rr.num_bases = 1;
1525         rr.basenames = &srw_req->database;
1526         rr.operation = srw_req->operation;
1527         rr.operation_status = "failed";
1528         rr.record_id = 0;
1529         rr.record_versions = 0;
1530         rr.num_versions = 0;
1531         rr.record_packing = "string";
1532         rr.record_schema = 0;
1533         rr.record_data = 0;
1534         rr.extra_record_data = 0;
1535         rr.extra_request_data = 0;
1536         rr.extra_response_data = 0;
1537         rr.uri = 0;
1538         rr.message = 0;
1539         rr.details = 0;
1540
1541         *http_code = 200;
1542         if (rr.operation == 0)
1543         {
1544             yaz_add_sru_update_diagnostic(
1545                 assoc->encode, &srw_res->diagnostics,
1546                 &srw_res->num_diagnostics,
1547                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1548                 "action" );
1549             return;
1550         }
1551         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1552         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1553         if (!strcmp( rr.operation, "delete"))
1554         {
1555             if (srw_req->record && !srw_req->record->recordSchema)
1556             {
1557                 rr.record_schema = odr_strdup(
1558                     assoc->encode,
1559                     srw_req->record->recordSchema);
1560             }
1561             if (srw_req->record)
1562             {
1563                 rr.record_data = odr_strdupn(
1564                     assoc->encode,
1565                     srw_req->record->recordData_buf,
1566                     srw_req->record->recordData_len );
1567             }
1568             if (extra && extra->extraRecordData_len)
1569             {
1570                 rr.extra_record_data = odr_strdupn(
1571                     assoc->encode,
1572                     extra->extraRecordData_buf,
1573                     extra->extraRecordData_len );
1574             }
1575             if (srw_req->recordId)
1576                 rr.record_id = srw_req->recordId;
1577             else if (extra && extra->recordIdentifier)
1578                 rr.record_id = extra->recordIdentifier;
1579         }
1580         else if (!strcmp(rr.operation, "replace"))
1581         {
1582             if (srw_req->recordId)
1583                 rr.record_id = srw_req->recordId;
1584             else if (extra && extra->recordIdentifier)
1585                 rr.record_id = extra->recordIdentifier;
1586             else
1587             {
1588                 yaz_add_sru_update_diagnostic(
1589                     assoc->encode, &srw_res->diagnostics,
1590                     &srw_res->num_diagnostics,
1591                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1592                     "recordIdentifier");
1593             }
1594             if (!srw_req->record)
1595             {
1596                 yaz_add_sru_update_diagnostic(
1597                     assoc->encode, &srw_res->diagnostics,
1598                     &srw_res->num_diagnostics,
1599                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1600                     "record");
1601             }
1602             else
1603             {
1604                 if (srw_req->record->recordSchema)
1605                     rr.record_schema = odr_strdup(
1606                         assoc->encode, srw_req->record->recordSchema);
1607                 if (srw_req->record->recordData_len )
1608                 {
1609                     rr.record_data = odr_strdupn(assoc->encode,
1610                                                  srw_req->record->recordData_buf,
1611                                                  srw_req->record->recordData_len );
1612                 }
1613                 else
1614                 {
1615                     yaz_add_sru_update_diagnostic(
1616                         assoc->encode, &srw_res->diagnostics,
1617                         &srw_res->num_diagnostics,
1618                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1619                         "recordData" );
1620                 }
1621             }
1622             if (extra && extra->extraRecordData_len)
1623             {
1624                 rr.extra_record_data = odr_strdupn(
1625                     assoc->encode,
1626                     extra->extraRecordData_buf,
1627                     extra->extraRecordData_len );
1628             }
1629         }
1630         else if (!strcmp(rr.operation, "insert"))
1631         {
1632             if (srw_req->recordId)
1633                 rr.record_id = srw_req->recordId;
1634             else if (extra)
1635                 rr.record_id = extra->recordIdentifier;
1636
1637             if (srw_req->record)
1638             {
1639                 if (srw_req->record->recordSchema)
1640                     rr.record_schema = odr_strdup(
1641                         assoc->encode, srw_req->record->recordSchema);
1642
1643                 if (srw_req->record->recordData_len)
1644                     rr.record_data = odr_strdupn(
1645                         assoc->encode,
1646                         srw_req->record->recordData_buf,
1647                         srw_req->record->recordData_len );
1648             }
1649             if (extra && extra->extraRecordData_len)
1650             {
1651                 rr.extra_record_data = odr_strdupn(
1652                     assoc->encode,
1653                     extra->extraRecordData_buf,
1654                     extra->extraRecordData_len );
1655             }
1656         }
1657         else
1658             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1659                                           &srw_res->num_diagnostics,
1660                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1661                                           rr.operation );
1662
1663         if (srw_req->record)
1664         {
1665             const char *pack_str =
1666                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1667             if (pack_str)
1668                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1669         }
1670
1671         if (srw_req->num_recordVersions)
1672         {
1673             rr.record_versions = srw_req->recordVersions;
1674             rr.num_versions = srw_req->num_recordVersions;
1675         }
1676         if (srw_req->extraRequestData_len)
1677         {
1678             rr.extra_request_data = odr_strdupn(assoc->encode,
1679                                                 srw_req->extraRequestData_buf,
1680                                                 srw_req->extraRequestData_len );
1681         }
1682         if (srw_res->num_diagnostics == 0)
1683         {
1684             if ( assoc->init->bend_srw_update)
1685                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1686             else
1687                 yaz_add_sru_update_diagnostic(
1688                     assoc->encode, &srw_res->diagnostics,
1689                     &srw_res->num_diagnostics,
1690                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1691                     "No Update backend handler");
1692         }
1693
1694         if (rr.uri)
1695             yaz_add_srw_diagnostic_uri(assoc->encode,
1696                                        &srw_res->diagnostics,
1697                                        &srw_res->num_diagnostics,
1698                                        rr.uri,
1699                                        rr.message,
1700                                        rr.details);
1701         srw_res->recordId = rr.record_id;
1702         srw_res->operationStatus = rr.operation_status;
1703         srw_res->recordVersions = rr.record_versions;
1704         srw_res->num_recordVersions = rr.num_versions;
1705         if (srw_res->extraResponseData_len)
1706         {
1707             srw_res->extraResponseData_buf = rr.extra_response_data;
1708             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1709         }
1710         if (srw_res->num_diagnostics == 0 && rr.record_data)
1711         {
1712             srw_res->record = yaz_srw_get_record(assoc->encode);
1713             srw_res->record->recordSchema = rr.record_schema;
1714             if (rr.record_packing)
1715             {
1716                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1717
1718                 if (pack == -1)
1719                 {
1720                     pack = Z_SRW_recordPacking_string;
1721                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1722                             rr.record_packing);
1723                 }
1724                 srw_res->record->recordPacking = pack;
1725             }
1726             srw_res->record->recordData_buf = rr.record_data;
1727             srw_res->record->recordData_len = strlen(rr.record_data);
1728             if (rr.extra_record_data)
1729             {
1730                 Z_SRW_extra_record *ex =
1731                     yaz_srw_get_extra_record(assoc->encode);
1732                 srw_res->extra_record = ex;
1733                 ex->extraRecordData_buf = rr.extra_record_data;
1734                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1735             }
1736         }
1737     }
1738 }
1739
1740 /* check if path is OK (1); BAD (0) */
1741 static int check_path(const char *path)
1742 {
1743     if (*path != '/')
1744         return 0;
1745     if (strstr(path, ".."))
1746         return 0;
1747     return 1;
1748 }
1749
1750 static char *read_file(const char *fname, ODR o, size_t *sz)
1751 {
1752     char *buf;
1753     FILE *inf = fopen(fname, "rb");
1754     if (!inf)
1755         return 0;
1756
1757     fseek(inf, 0L, SEEK_END);
1758     *sz = ftell(inf);
1759     rewind(inf);
1760     buf = (char *) odr_malloc(o, *sz);
1761     if (fread(buf, 1, *sz, inf) != *sz)
1762         yaz_log(YLOG_WARN|YLOG_ERRNO, "short read %s", fname);
1763     fclose(inf);
1764     return buf;
1765 }
1766
1767 static void process_http_request(association *assoc, request *req)
1768 {
1769     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1770     ODR o = assoc->encode;
1771     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1772     Z_SRW_PDU *sr = 0;
1773     Z_SOAP *soap_package = 0;
1774     Z_GDU *p = 0;
1775     char *charset = 0;
1776     Z_HTTP_Response *hres = 0;
1777     int keepalive = 1;
1778     const char *stylesheet = 0; /* for now .. set later */
1779     Z_SRW_diagnostic *diagnostic = 0;
1780     int num_diagnostic = 0;
1781     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1782
1783     yaz_log(log_request, "%s %s HTTP/%s", hreq->method, hreq->path, hreq->version);
1784     if (!control_association(assoc, host, 0))
1785     {
1786         p = z_get_HTTP_Response(o, 404);
1787         r = 1;
1788     }
1789     if (r == 2 && assoc->server && assoc->server->docpath
1790         && hreq->path[0] == '/'
1791         &&
1792         /* check if path is a proper prefix of documentroot */
1793         strncmp(hreq->path+1, assoc->server->docpath,
1794                 strlen(assoc->server->docpath))
1795         == 0)
1796     {
1797         if (!check_path(hreq->path))
1798         {
1799             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1800             p = z_get_HTTP_Response(o, 404);
1801         }
1802         else
1803         {
1804             size_t content_size = 0;
1805             char *content_buf = read_file(hreq->path+1, o, &content_size);
1806             if (!content_buf)
1807             {
1808                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1809                 p = z_get_HTTP_Response(o, 404);
1810             }
1811             else
1812             {
1813                 const char *ctype = 0;
1814                 yaz_mime_types types = yaz_mime_types_create();
1815
1816                 yaz_mime_types_add(types, "xsl", "application/xml");
1817                 yaz_mime_types_add(types, "xml", "application/xml");
1818                 yaz_mime_types_add(types, "css", "text/css");
1819                 yaz_mime_types_add(types, "html", "text/html");
1820                 yaz_mime_types_add(types, "htm", "text/html");
1821                 yaz_mime_types_add(types, "txt", "text/plain");
1822                 yaz_mime_types_add(types, "js", "application/x-javascript");
1823
1824                 yaz_mime_types_add(types, "gif", "image/gif");
1825                 yaz_mime_types_add(types, "png", "image/png");
1826                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1827                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1828
1829                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1830                 if (!ctype)
1831                 {
1832                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1833                     p = z_get_HTTP_Response(o, 404);
1834                 }
1835                 else
1836                 {
1837                     p = z_get_HTTP_Response(o, 200);
1838                     hres = p->u.HTTP_Response;
1839                     hres->content_buf = content_buf;
1840                     hres->content_len = content_size;
1841                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1842                 }
1843                 yaz_mime_types_destroy(types);
1844             }
1845         }
1846         r = 1;
1847     }
1848
1849     if (r == 2)
1850     {
1851         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1852         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1853     }
1854     if (r == 2)  /* not taken */
1855     {
1856         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1857                            &diagnostic, &num_diagnostic);
1858         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1859     }
1860     if (r == 0)  /* decode SRW/SRU OK .. */
1861     {
1862         int http_code = 200;
1863         if (sr->which == Z_SRW_searchRetrieve_request)
1864         {
1865             Z_SRW_PDU *res =
1866                 yaz_srw_get_pdu_e(assoc->encode, Z_SRW_searchRetrieve_response,
1867                                   sr);
1868             stylesheet = sr->u.request->stylesheet;
1869             if (num_diagnostic)
1870             {
1871                 res->u.response->diagnostics = diagnostic;
1872                 res->u.response->num_diagnostics = num_diagnostic;
1873             }
1874             else
1875             {
1876                 srw_bend_search(assoc, hreq->headers, sr, res, &http_code);
1877             }
1878             if (http_code == 200)
1879                 soap_package->u.generic->p = res;
1880         }
1881         else if (sr->which == Z_SRW_explain_request)
1882         {
1883             Z_SRW_PDU *res = yaz_srw_get_pdu_e(o, Z_SRW_explain_response, sr);
1884             stylesheet = sr->u.explain_request->stylesheet;
1885             if (num_diagnostic)
1886             {
1887                 res->u.explain_response->diagnostics = diagnostic;
1888                 res->u.explain_response->num_diagnostics = num_diagnostic;
1889             }
1890             srw_bend_explain(assoc, hreq->headers,
1891                              sr, res->u.explain_response, &http_code);
1892             if (http_code == 200)
1893                 soap_package->u.generic->p = res;
1894         }
1895         else if (sr->which == Z_SRW_scan_request)
1896         {
1897             Z_SRW_PDU *res = yaz_srw_get_pdu_e(o, Z_SRW_scan_response, sr);
1898             stylesheet = sr->u.scan_request->stylesheet;
1899             if (num_diagnostic)
1900             {
1901                 res->u.scan_response->diagnostics = diagnostic;
1902                 res->u.scan_response->num_diagnostics = num_diagnostic;
1903             }
1904             srw_bend_scan(assoc, hreq->headers, sr, res, &http_code);
1905             if (http_code == 200)
1906                 soap_package->u.generic->p = res;
1907         }
1908         else if (sr->which == Z_SRW_update_request)
1909         {
1910             Z_SRW_PDU *res = yaz_srw_get_pdu(o, Z_SRW_update_response,
1911                                              sr->srw_version);
1912             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1913             if (num_diagnostic)
1914             {
1915                 res->u.update_response->diagnostics = diagnostic;
1916                 res->u.update_response->num_diagnostics = num_diagnostic;
1917             }
1918             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1919             srw_bend_update(assoc, hreq->headers,
1920                             sr, res->u.update_response, &http_code);
1921             if (http_code == 200)
1922                 soap_package->u.generic->p = res;
1923         }
1924         else
1925         {
1926             yaz_log(log_request, "SOAP ERROR");
1927             /* FIXME - what error, what query */
1928             http_code = 500;
1929             z_soap_error(assoc->encode, soap_package,
1930                          "SOAP-ENV:Client", "Bad method", 0);
1931         }
1932         if (http_code == 200 || http_code == 500)
1933         {
1934             static Z_SOAP_Handler soap_handlers[4] = {
1935 #if YAZ_HAVE_XML2
1936                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1937                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1938                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1939 #endif
1940                 {0, 0, 0}
1941             };
1942             char ctype[80];
1943             p = z_get_HTTP_Response(o, 200);
1944             hres = p->u.HTTP_Response;
1945
1946             if (!stylesheet && assoc->server)
1947                 stylesheet = assoc->server->stylesheet;
1948
1949             /* empty stylesheet means NO stylesheet */
1950             if (stylesheet && *stylesheet == '\0')
1951                 stylesheet = 0;
1952
1953             z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1954                                  &hres->content_buf, &hres->content_len,
1955                                  soap_handlers, charset, stylesheet);
1956             hres->code = http_code;
1957
1958             strcpy(ctype, "text/xml");
1959             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1960         }
1961         else
1962             p = z_get_HTTP_Response(o, http_code);
1963     }
1964
1965     if (p == 0)
1966         p = z_get_HTTP_Response(o, 500);
1967     hres = p->u.HTTP_Response;
1968     if (!strcmp(hreq->version, "1.0"))
1969     {
1970         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1971         if (v && !strcmp(v, "Keep-Alive"))
1972             keepalive = 1;
1973         else
1974             keepalive = 0;
1975         hres->version = "1.0";
1976     }
1977     else
1978     {
1979         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1980         if (v && !strcmp(v, "close"))
1981             keepalive = 0;
1982         else
1983             keepalive = 1;
1984         hres->version = "1.1";
1985     }
1986     if (!keepalive || !assoc->last_control->keepalive)
1987     {
1988         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1989         assoc->state = ASSOC_DEAD;
1990         assoc->cs_get_mask = 0;
1991     }
1992     else
1993     {
1994         int t;
1995         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1996
1997         if (alive && yaz_isdigit(*(const unsigned char *) alive))
1998             t = atoi(alive);
1999         else
2000             t = 15;
2001         if (t < 0 || t > 3600)
2002             t = 3600;
2003         iochan_settimeout(assoc->client_chan,t);
2004         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
2005     }
2006     process_gdu_response(assoc, req, p);
2007 }
2008
2009 static void process_gdu_request(association *assoc, request *req)
2010 {
2011     if (req->gdu_request->which == Z_GDU_Z3950)
2012     {
2013         char *msg = 0;
2014         req->apdu_request = req->gdu_request->u.z3950;
2015         if (process_z_request(assoc, req, &msg) < 0)
2016             do_close_req(assoc, Z_Close_systemProblem, msg, req);
2017     }
2018     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
2019         process_http_request(assoc, req);
2020     else
2021     {
2022         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
2023     }
2024 }
2025
2026 /*
2027  * Initiate request processing.
2028  */
2029 static int process_z_request(association *assoc, request *req, char **msg)
2030 {
2031     Z_APDU *res;
2032     int retval;
2033
2034     *msg = "Unknown Error";
2035     assert(req && req->state == REQUEST_IDLE);
2036     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
2037     {
2038         *msg = "Missing InitRequest";
2039         return -1;
2040     }
2041     switch (req->apdu_request->which)
2042     {
2043     case Z_APDU_initRequest:
2044         res = process_initRequest(assoc, req); break;
2045     case Z_APDU_searchRequest:
2046         res = process_searchRequest(assoc, req); break;
2047     case Z_APDU_presentRequest:
2048         res = process_presentRequest(assoc, req); break;
2049     case Z_APDU_scanRequest:
2050         if (assoc->init->bend_scan)
2051             res = process_scanRequest(assoc, req);
2052         else
2053         {
2054             *msg = "Cannot handle Scan APDU";
2055             return -1;
2056         }
2057         break;
2058     case Z_APDU_extendedServicesRequest:
2059         if (assoc->init->bend_esrequest)
2060             res = process_ESRequest(assoc, req);
2061         else
2062         {
2063             *msg = "Cannot handle Extended Services APDU";
2064             return -1;
2065         }
2066         break;
2067     case Z_APDU_sortRequest:
2068         if (assoc->init->bend_sort)
2069             res = process_sortRequest(assoc, req);
2070         else
2071         {
2072             *msg = "Cannot handle Sort APDU";
2073             return -1;
2074         }
2075         break;
2076     case Z_APDU_close:
2077         process_close(assoc, req);
2078         return 0;
2079     case Z_APDU_deleteResultSetRequest:
2080         if (assoc->init->bend_delete)
2081             res = process_deleteRequest(assoc, req);
2082         else
2083         {
2084             *msg = "Cannot handle Delete APDU";
2085             return -1;
2086         }
2087         break;
2088     case Z_APDU_segmentRequest:
2089         if (assoc->init->bend_segment)
2090         {
2091             res = process_segmentRequest(assoc, req);
2092         }
2093         else
2094         {
2095             *msg = "Cannot handle Segment APDU";
2096             return -1;
2097         }
2098         break;
2099     case Z_APDU_triggerResourceControlRequest:
2100         return 0;
2101     default:
2102         *msg = "Bad APDU received";
2103         return -1;
2104     }
2105     if (res)
2106     {
2107         yaz_log(YLOG_DEBUG, "  result immediately available");
2108         retval = process_z_response(assoc, req, res);
2109     }
2110     else
2111     {
2112         yaz_log(YLOG_DEBUG, "  result unavailable");
2113         retval = -1;
2114     }
2115     return retval;
2116 }
2117
2118 /*
2119  * Encode response, and transfer the request structure to the outgoing queue.
2120  */
2121 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2122 {
2123     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2124
2125     if (assoc->print)
2126     {
2127         if (!z_GDU(assoc->print, &res, 0, 0))
2128             yaz_log(YLOG_WARN, "ODR print error: %s",
2129                 odr_errmsg(odr_geterror(assoc->print)));
2130         odr_reset(assoc->print);
2131     }
2132     if (!z_GDU(assoc->encode, &res, 0, 0))
2133     {
2134         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2135                 odr_errmsg(odr_geterror(assoc->decode)),
2136                 odr_getelement(assoc->decode));
2137         return -1;
2138     }
2139     req->response = odr_getbuf(assoc->encode, &req->len_response,
2140         &req->size_response);
2141     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2142     odr_reset(assoc->encode);
2143     req->state = REQUEST_IDLE;
2144     request_enq(&assoc->outgoing, req);
2145     /* turn the work over to the ir_session handler */
2146     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2147     assoc->cs_put_mask = EVENT_OUTPUT;
2148     /* Is there more work to be done? give that to the input handler too */
2149     for (;;)
2150     {
2151         req = request_head(&assoc->incoming);
2152         if (req && req->state == REQUEST_IDLE)
2153         {
2154             request_deq(&assoc->incoming);
2155             process_gdu_request(assoc, req);
2156         }
2157         else
2158             break;
2159     }
2160     return 0;
2161 }
2162
2163 /*
2164  * Encode response, and transfer the request structure to the outgoing queue.
2165  */
2166 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2167 {
2168     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*gres));
2169     gres->which = Z_GDU_Z3950;
2170     gres->u.z3950 = res;
2171
2172     return process_gdu_response(assoc, req, gres);
2173 }
2174
2175 static char *get_vhost(Z_OtherInformation *otherInfo)
2176 {
2177     return yaz_oi_get_string_oid(&otherInfo, yaz_oid_userinfo_proxy, 1, 0);
2178 }
2179
2180 /*
2181  * Handle init request.
2182  * At the moment, we don't check the options
2183  * anywhere else in the code - we just try not to do anything that would
2184  * break a naive client. We'll toss 'em into the association block when
2185  * we need them there.
2186  */
2187 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2188 {
2189     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2190     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2191     Z_InitResponse *resp = apdu->u.initResponse;
2192     bend_initresult *binitres;
2193     char options[140];
2194     statserv_options_block *cb = 0;  /* by default no control for backend */
2195
2196     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2197         cb = statserv_getcontrol();  /* got control block for backend */
2198
2199     if (cb && assoc->backend)
2200         (*cb->bend_close)(assoc->backend);
2201
2202     yaz_log(log_requestdetail, "Got initRequest");
2203     if (req->implementationId)
2204         yaz_log(log_requestdetail, "Id:        %s",
2205                 req->implementationId);
2206     if (req->implementationName)
2207         yaz_log(log_requestdetail, "Name:      %s",
2208                 req->implementationName);
2209     if (req->implementationVersion)
2210         yaz_log(log_requestdetail, "Version:   %s",
2211                 req->implementationVersion);
2212
2213     assoc_init_reset(assoc,
2214                      yaz_oi_get_string_oid(&req->otherInfo,
2215                                            yaz_oid_userinfo_client_ip, 1, 0));
2216     assoc->init->auth = req->idAuthentication;
2217     assoc->init->referenceId = req->referenceId;
2218
2219     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2220     {
2221         Z_CharSetandLanguageNegotiation *negotiation =
2222             yaz_get_charneg_record (req->otherInfo);
2223         if (negotiation &&
2224             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2225             assoc->init->charneg_request = negotiation;
2226     }
2227
2228     /* by default named_result_sets is 0 .. Enable it if client asks for it. */
2229     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2230         assoc->init->named_result_sets = 1;
2231
2232     assoc->backend = 0;
2233     if (cb)
2234     {
2235         if (req->implementationVersion)
2236             yaz_log(log_requestdetail, "Config:    %s",
2237                     cb->configname);
2238
2239         iochan_settimeout(assoc->client_chan, cb->idle_timeout);
2240
2241         /* we have a backend control block, so call that init function */
2242         if (!(binitres = (*cb->bend_init)(assoc->init)))
2243         {
2244             yaz_log(YLOG_WARN, "Bad response from backend.");
2245             return 0;
2246         }
2247         assoc->backend = binitres->handle;
2248     }
2249     else
2250     {
2251         /* no backend. return error */
2252         binitres = (bend_initresult *)
2253             odr_malloc(assoc->encode, sizeof(*binitres));
2254         binitres->errstring = 0;
2255         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2256         iochan_settimeout(assoc->client_chan, 10);
2257     }
2258     if ((assoc->init->bend_sort))
2259         yaz_log(YLOG_DEBUG, "Sort handler installed");
2260     if ((assoc->init->bend_search))
2261         yaz_log(YLOG_DEBUG, "Search handler installed");
2262     if ((assoc->init->bend_present))
2263         yaz_log(YLOG_DEBUG, "Present handler installed");
2264     if ((assoc->init->bend_esrequest))
2265         yaz_log(YLOG_DEBUG, "ESRequest handler installed");
2266     if ((assoc->init->bend_delete))
2267         yaz_log(YLOG_DEBUG, "Delete handler installed");
2268     if ((assoc->init->bend_scan))
2269         yaz_log(YLOG_DEBUG, "Scan handler installed");
2270     if ((assoc->init->bend_segment))
2271         yaz_log(YLOG_DEBUG, "Segment handler installed");
2272
2273     resp->referenceId = req->referenceId;
2274     *options = '\0';
2275     /* let's tell the client what we can do */
2276     if (ODR_MASK_GET(req->options, Z_Options_search))
2277     {
2278         ODR_MASK_SET(resp->options, Z_Options_search);
2279         strcat(options, "srch");
2280     }
2281     if (ODR_MASK_GET(req->options, Z_Options_present))
2282     {
2283         ODR_MASK_SET(resp->options, Z_Options_present);
2284         strcat(options, " prst");
2285     }
2286     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2287         assoc->init->bend_delete)
2288     {
2289         ODR_MASK_SET(resp->options, Z_Options_delSet);
2290         strcat(options, " del");
2291     }
2292     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2293         assoc->init->bend_esrequest)
2294     {
2295         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2296         strcat(options, " extendedServices");
2297     }
2298     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets)
2299         && assoc->init->named_result_sets)
2300     {
2301         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2302         strcat(options, " namedresults");
2303     }
2304     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2305     {
2306         ODR_MASK_SET(resp->options, Z_Options_scan);
2307         strcat(options, " scan");
2308     }
2309     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2310     {
2311         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2312         strcat(options, " concurrop");
2313     }
2314     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2315     {
2316         ODR_MASK_SET(resp->options, Z_Options_sort);
2317         strcat(options, " sort");
2318     }
2319
2320     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2321     {
2322         Z_OtherInformationUnit *p0;
2323
2324         if (!assoc->init->charneg_response)
2325         {
2326             if (assoc->init->query_charset)
2327             {
2328                 assoc->init->charneg_response = yaz_set_response_charneg(
2329                     assoc->encode, assoc->init->query_charset, 0,
2330                     assoc->init->records_in_same_charset);
2331             }
2332             else
2333             {
2334                 yaz_log(YLOG_WARN, "default query_charset not defined by backend");
2335             }
2336         }
2337         if (assoc->init->charneg_response
2338             && (p0=yaz_oi_update(&resp->otherInfo, assoc->encode, NULL, 0, 0)))
2339         {
2340             p0->which = Z_OtherInfo_externallyDefinedInfo;
2341             p0->information.externallyDefinedInfo =
2342                 assoc->init->charneg_response;
2343             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2344             strcat(options, " negotiation");
2345         }
2346     }
2347     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2348         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2349
2350     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2351     {
2352         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2353         assoc->version = 1; /* 1 & 2 are equivalent */
2354     }
2355     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2356     {
2357         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2358         assoc->version = 2;
2359     }
2360     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2361     {
2362         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2363         assoc->version = 3;
2364     }
2365
2366     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2367
2368     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2369         assoc->maximumRecordSize = odr_int_to_int(*req->maximumRecordSize);
2370
2371     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2372         assoc->preferredMessageSize = odr_int_to_int(*req->preferredMessageSize);
2373
2374     resp->preferredMessageSize =
2375         odr_intdup(assoc->encode, assoc->preferredMessageSize);
2376     resp->maximumRecordSize =
2377         odr_intdup(assoc->encode, assoc->maximumRecordSize);
2378
2379     resp->implementationId = odr_prepend(assoc->encode,
2380                 assoc->init->implementation_id,
2381                 resp->implementationId);
2382
2383     resp->implementationVersion = odr_prepend(assoc->encode,
2384                 assoc->init->implementation_version,
2385                 resp->implementationVersion);
2386
2387     resp->implementationName = odr_prepend(assoc->encode,
2388                 assoc->init->implementation_name,
2389                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2390
2391     if (binitres->errcode)
2392     {
2393         assoc->state = ASSOC_DEAD;
2394         resp->userInformationField =
2395             init_diagnostics(assoc->encode, binitres->errcode,
2396                              binitres->errstring);
2397         *resp->result = 0;
2398     }
2399     else
2400         assoc->state = ASSOC_UP;
2401
2402     if (log_request)
2403     {
2404         if (!req->idAuthentication)
2405             yaz_log(log_request, "Auth none");
2406         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2407         {
2408             const char *open = req->idAuthentication->u.open;
2409             const char *slash = strchr(open, '/');
2410             int len;
2411             if (slash)
2412                 len = slash - open;
2413             else
2414                 len = strlen(open);
2415                 yaz_log(log_request, "Auth open %.*s", len, open);
2416         }
2417         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2418         {
2419             const char *user = req->idAuthentication->u.idPass->userId;
2420             const char *group = req->idAuthentication->u.idPass->groupId;
2421             yaz_log(log_request, "Auth idPass %s %s",
2422                     user ? user : "-", group ? group : "-");
2423         }
2424         else if (req->idAuthentication->which
2425                  == Z_IdAuthentication_anonymous)
2426         {
2427             yaz_log(log_request, "Auth anonymous");
2428         }
2429         else
2430         {
2431             yaz_log(log_request, "Auth other");
2432         }
2433     }
2434     if (log_request)
2435     {
2436         WRBUF wr = wrbuf_alloc();
2437         wrbuf_printf(wr, "Init ");
2438         if (binitres->errcode)
2439             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2440         else
2441             wrbuf_printf(wr, "OK -");
2442         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2443                      (req->implementationId ? req->implementationId :"-"),
2444                      (req->implementationName ?
2445                       req->implementationName : "-"),
2446                      (req->implementationVersion ?
2447                       req->implementationVersion : "-")
2448             );
2449         yaz_log(log_request, "%s", wrbuf_cstr(wr));
2450         wrbuf_destroy(wr);
2451     }
2452     return apdu;
2453 }
2454
2455 /*
2456  * Set the specified `errcode' and `errstring' into a UserInfo-1
2457  * external to be returned to the client in accordance with Z35.90
2458  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2459  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2460  */
2461 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2462 {
2463     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2464         addinfo ? " -- " : "", addinfo ? addinfo : "");
2465     return zget_init_diagnostics(odr, error, addinfo);
2466 }
2467
2468 /*
2469  * nonsurrogate diagnostic record.
2470  */
2471 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2472 {
2473     Z_Records *rec = (Z_Records *) odr_malloc(assoc->encode, sizeof(*rec));
2474
2475     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2476             addinfo ? " -- " : "", addinfo ? addinfo : "");
2477
2478     rec->which = Z_Records_NSD;
2479     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2480                                                            error, addinfo);
2481     return rec;
2482 }
2483
2484 /*
2485  * surrogate diagnostic.
2486  */
2487 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2488                                           const char *dbname,
2489                                           int error, const char *addinfo)
2490 {
2491     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2492             addinfo ? " -- " : "", addinfo ? addinfo : "");
2493     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2494 }
2495
2496 static Z_Records *pack_records(association *a, char *setname, Odr_int start,
2497                                Odr_int *num, Z_RecordComposition *comp,
2498                                Odr_int *next, Odr_int *pres,
2499                                Z_ReferenceId *referenceId,
2500                                Odr_oid *oid, int *errcode)
2501 {
2502     int recno;
2503     Odr_int dumped_records = 0;
2504     int toget = odr_int_to_int(*num);
2505     Z_Records *records =
2506         (Z_Records *) odr_malloc(a->encode, sizeof(*records));
2507     Z_NamePlusRecordList *reclist =
2508         (Z_NamePlusRecordList *) odr_malloc(a->encode, sizeof(*reclist));
2509
2510     records->which = Z_Records_DBOSD;
2511     records->u.databaseOrSurDiagnostics = reclist;
2512     reclist->num_records = 0;
2513
2514     if (toget < 0)
2515         return diagrec(a, YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE, 0);
2516     else if (toget == 0)
2517         reclist->records = odr_nullval();
2518     else
2519         reclist->records = (Z_NamePlusRecord **)
2520             odr_malloc(a->encode, sizeof(*reclist->records) * toget);
2521
2522     *pres = Z_PresentStatus_success;
2523     *num = 0;
2524     *next = 0;
2525
2526     yaz_log(log_requestdetail, "Request to pack " ODR_INT_PRINTF "+%d %s", start, toget, setname);
2527     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2528         a->maximumRecordSize);
2529     for (recno = odr_int_to_int(start); reclist->num_records < toget; recno++)
2530     {
2531         bend_fetch_rr freq;
2532         Z_NamePlusRecord *thisrec;
2533         Odr_int this_length = 0;
2534         /*
2535          * we get the number of bytes allocated on the stream before any
2536          * allocation done by the backend - this should give us a reasonable
2537          * idea of the total size of the data so far.
2538          */
2539         Odr_int total_length = odr_total(a->encode) - dumped_records;
2540         freq.errcode = 0;
2541         freq.errstring = 0;
2542         freq.basename = 0;
2543         freq.len = 0;
2544         freq.record = 0;
2545         freq.last_in_set = 0;
2546         freq.setname = setname;
2547         freq.surrogate_flag = 0;
2548         freq.number = recno;
2549         freq.comp = comp;
2550         freq.request_format = oid;
2551         freq.output_format = 0;
2552         freq.stream = a->encode;
2553         freq.print = a->print;
2554         freq.referenceId = referenceId;
2555         freq.schema = 0;
2556
2557         retrieve_fetch(a, &freq);
2558
2559         *next = freq.last_in_set ? 0 : recno + 1;
2560
2561         if (freq.errcode)
2562         {
2563             if (!freq.surrogate_flag) /* non-surrogate diagnostic i.e. global */
2564             {
2565                 char s[20];
2566                 *pres = Z_PresentStatus_failure;
2567                 /* for 'present request out of range',
2568                    set addinfo to record position if not set */
2569                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2570                                 freq.errstring == 0)
2571                 {
2572                     sprintf(s, "%d", recno);
2573                     freq.errstring = s;
2574                 }
2575                 if (errcode)
2576                     *errcode = freq.errcode;
2577                 return diagrec(a, freq.errcode, freq.errstring);
2578             }
2579             reclist->records[reclist->num_records] =
2580                 surrogatediagrec(a, freq.basename, freq.errcode,
2581                                  freq.errstring);
2582             reclist->num_records++;
2583             continue;
2584         }
2585         if (freq.record == 0)  /* no error and no record ? */
2586         {
2587             *pres = Z_PresentStatus_partial_4;
2588             *next = 0;   /* signal end-of-set and stop */
2589             break;
2590         }
2591         if (freq.len >= 0)
2592             this_length = freq.len;
2593         else
2594             this_length = odr_total(a->encode) - total_length - dumped_records;
2595         yaz_log(log_requestdetail, "  fetched record, len=" ODR_INT_PRINTF
2596                 " total=" ODR_INT_PRINTF " dumped=" ODR_INT_PRINTF,
2597                 this_length, total_length, dumped_records);
2598         if (a->preferredMessageSize > 0 &&
2599             this_length + total_length > a->preferredMessageSize)
2600         {
2601             /* record is small enough, really */
2602             if (this_length <= a->preferredMessageSize && recno > start)
2603             {
2604                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2605                 *pres = Z_PresentStatus_partial_2;
2606                 if (*next > 0)
2607                     (*next)--;
2608                 break;
2609             }
2610             /* record can only be fetched by itself */
2611             if (this_length < a->maximumRecordSize)
2612             {
2613                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2614                 if (toget > 1)
2615                 {
2616                     yaz_log(YLOG_DEBUG, "  Dropped it");
2617                     reclist->records[reclist->num_records] =
2618                          surrogatediagrec(
2619                              a, freq.basename,
2620                              YAZ_BIB1_RECORD_EXCEEDS_PREFERRED_MESSAGE_SIZE, 0);
2621                     reclist->num_records++;
2622                     dumped_records += this_length;
2623                     continue;
2624                 }
2625             }
2626             else /* too big entirely */
2627             {
2628                 yaz_log(log_requestdetail, "Record > maxrcdsz "
2629                         "this=" ODR_INT_PRINTF " max=%d",
2630                         this_length, a->maximumRecordSize);
2631                 reclist->records[reclist->num_records] =
2632                     surrogatediagrec(
2633                         a, freq.basename,
2634                         YAZ_BIB1_RECORD_EXCEEDS_MAXIMUM_RECORD_SIZE, 0);
2635                 reclist->num_records++;
2636                 dumped_records += this_length;
2637                 continue;
2638             }
2639         }
2640
2641         if (!(thisrec = (Z_NamePlusRecord *)
2642               odr_malloc(a->encode, sizeof(*thisrec))))
2643             return 0;
2644         thisrec->databaseName = odr_strdup_null(a->encode, freq.basename);
2645         thisrec->which = Z_NamePlusRecord_databaseRecord;
2646
2647         if (!freq.output_format)
2648         {
2649             yaz_log(YLOG_WARN, "bend_fetch output_format not set");
2650             return 0;
2651         }
2652         thisrec->u.databaseRecord = z_ext_record_oid(
2653             a->encode, freq.output_format, freq.record, freq.len);
2654         if (!thisrec->u.databaseRecord)
2655             return 0;
2656         reclist->records[reclist->num_records] = thisrec;
2657         reclist->num_records++;
2658         if (freq.last_in_set)
2659             break;
2660     }
2661     *num = reclist->num_records;
2662     return records;
2663 }
2664
2665 static Z_APDU *process_searchRequest(association *assoc, request *reqb)
2666 {
2667     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2668     bend_search_rr *bsrr =
2669         (bend_search_rr *)nmem_malloc(reqb->request_mem, sizeof(*bsrr));
2670
2671     yaz_log(log_requestdetail, "Got SearchRequest.");
2672     bsrr->association = assoc;
2673     bsrr->referenceId = req->referenceId;
2674     bsrr->srw_sortKeys = 0;
2675     bsrr->srw_setname = 0;
2676     bsrr->srw_setnameIdleTime = 0;
2677     bsrr->estimated_hit_count = 0;
2678     bsrr->partial_resultset = 0;
2679     bsrr->extra_args = 0;
2680     bsrr->extra_response_data = 0;
2681
2682     yaz_log(log_requestdetail, "ResultSet '%s'", req->resultSetName);
2683     if (req->databaseNames)
2684     {
2685         int i;
2686         for (i = 0; i < req->num_databaseNames; i++)
2687             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2688     }
2689
2690     yaz_log_zquery_level(log_requestdetail,req->query);
2691
2692     if (assoc->init->bend_search)
2693     {
2694         bsrr->setname = req->resultSetName;
2695         bsrr->replace_set = *req->replaceIndicator;
2696         bsrr->num_bases = req->num_databaseNames;
2697         bsrr->basenames = req->databaseNames;
2698         bsrr->query = req->query;
2699         bsrr->stream = assoc->encode;
2700         nmem_transfer(odr_getmem(bsrr->stream), reqb->request_mem);
2701         bsrr->decode = assoc->decode;
2702         bsrr->print = assoc->print;
2703         bsrr->hits = 0;
2704         bsrr->errcode = 0;
2705         bsrr->errstring = NULL;
2706         bsrr->search_info = NULL;
2707         bsrr->search_input = req->additionalSearchInfo;
2708         if (!bsrr->search_input)
2709             bsrr->search_input = req->otherInfo;
2710         bsrr->present_number = *req->mediumSetPresentNumber;
2711
2712         if (assoc->server && assoc->server->client_query_charset &&
2713             req->query->which == Z_Query_type_1)
2714         {
2715             yaz_iconv_t cd =
2716                 yaz_iconv_open("UTF-8", assoc->server->client_query_charset);
2717             if (cd)
2718             {
2719                 yaz_query_charset_convert_rpnquery(req->query->u.type_1,
2720                                                    assoc->decode, cd);
2721                 yaz_iconv_close(cd);
2722             }
2723         }
2724
2725         if (assoc->server && assoc->server->cql_transform
2726             && req->query->which == Z_Query_type_104
2727             && req->query->u.type_104->which == Z_External_CQL)
2728         {
2729             /* have a CQL query and a CQL to PQF transform .. */
2730             int srw_errcode =
2731                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2732                         assoc->server->cql_transform, bsrr->query,
2733                         &bsrr->srw_sortKeys);
2734             if (srw_errcode)
2735                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2736         }
2737
2738         if (assoc->server && assoc->server->ccl_transform
2739             && req->query->which == Z_Query_type_2) /*CCL*/
2740         {
2741             /* have a CCL query and a CCL to PQF transform .. */
2742             int srw_errcode =
2743                 ccl2pqf(bsrr->stream, req->query->u.type_2,
2744                         assoc->server->ccl_transform, bsrr);
2745             if (srw_errcode)
2746                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2747         }
2748
2749         if (!bsrr->errcode)
2750             (assoc->init->bend_search)(assoc->backend, bsrr);
2751     }
2752     else
2753     {
2754         /* FIXME - make a diagnostic for it */
2755         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2756     }
2757     return response_searchRequest(assoc, reqb, bsrr);
2758 }
2759
2760 /*
2761  * Prepare a searchresponse based on the backend results. We probably want
2762  * to look at making the fetching of records nonblocking as well, but
2763  * so far, we'll keep things simple.
2764  * If bsrt is null, that means we're called in response to a communications
2765  * event, and we'll have to get the response for ourselves.
2766  */
2767 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2768                                       bend_search_rr *bsrt)
2769 {
2770     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2771     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2772     Z_SearchResponse *resp = (Z_SearchResponse *)
2773         odr_malloc(assoc->encode, sizeof(*resp));
2774     Odr_int *nulint = odr_intdup(assoc->encode, 0);
2775     Odr_int *next = odr_intdup(assoc->encode, 0);
2776     Odr_int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2777     Odr_int returnedrecs = 0;
2778
2779     apdu->which = Z_APDU_searchResponse;
2780     apdu->u.searchResponse = resp;
2781     resp->referenceId = req->referenceId;
2782     resp->additionalSearchInfo = 0;
2783     resp->otherInfo = 0;
2784     if (!bsrt)
2785     {
2786         yaz_log(YLOG_FATAL, "Bad result from backend");
2787         return 0;
2788     }
2789     else if (bsrt->errcode)
2790     {
2791         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2792         resp->resultCount = nulint;
2793         resp->numberOfRecordsReturned = nulint;
2794         resp->nextResultSetPosition = nulint;
2795         resp->searchStatus = odr_booldup(assoc->encode, 0);
2796         resp->resultSetStatus = none;
2797         resp->presentStatus = 0;
2798     }
2799     else
2800     {
2801         bool_t *sr = odr_booldup(assoc->encode, 1);
2802         Odr_int *toget = odr_intdup(assoc->encode, 0);
2803         Z_RecordComposition comp, *compp = 0;
2804
2805         yaz_log(log_requestdetail, "resultCount: " ODR_INT_PRINTF, bsrt->hits);
2806
2807         resp->records = 0;
2808         resp->resultCount = &bsrt->hits;
2809
2810         comp.which = Z_RecordComp_simple;
2811         /* how many records does the user agent want, then? */
2812         if (bsrt->hits < 0)
2813             *toget = 0;
2814         else if (bsrt->hits <= *req->smallSetUpperBound)
2815         {
2816             *toget = bsrt->hits;
2817             if ((comp.u.simple = req->smallSetElementSetNames))
2818                 compp = &comp;
2819         }
2820         else if (bsrt->hits < *req->largeSetLowerBound)
2821         {
2822             *toget = *req->mediumSetPresentNumber;
2823             if (*toget > bsrt->hits)
2824                 *toget = bsrt->hits;
2825             if ((comp.u.simple = req->mediumSetElementSetNames))
2826                 compp = &comp;
2827         }
2828         else
2829             *toget = 0;
2830
2831         if (*toget && !resp->records)
2832         {
2833             Odr_int *presst = odr_intdup(assoc->encode, 0);
2834             /* Call bend_present if defined */
2835             if (assoc->init->bend_present)
2836             {
2837                 bend_present_rr *bprr = (bend_present_rr *)
2838                     nmem_malloc(reqb->request_mem, sizeof(*bprr));
2839                 bprr->setname = req->resultSetName;
2840                 bprr->start = 1;
2841                 bprr->number = odr_int_to_int(*toget);
2842                 bprr->format = req->preferredRecordSyntax;
2843                 bprr->comp = compp;
2844                 bprr->referenceId = req->referenceId;
2845                 bprr->stream = assoc->encode;
2846                 bprr->print = assoc->print;
2847                 bprr->association = assoc;
2848                 bprr->errcode = 0;
2849                 bprr->errstring = NULL;
2850                 (*assoc->init->bend_present)(assoc->backend, bprr);
2851
2852                 if (bprr->errcode)
2853                 {
2854                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2855                     *resp->presentStatus = Z_PresentStatus_failure;
2856                 }
2857             }
2858
2859             if (!resp->records)
2860                 resp->records = pack_records(
2861                     assoc, req->resultSetName, 1,
2862                     toget, compp, next, presst, req->referenceId,
2863                     req->preferredRecordSyntax, NULL);
2864             if (!resp->records)
2865                 return 0;
2866             resp->numberOfRecordsReturned = toget;
2867             returnedrecs = *toget;
2868             resp->presentStatus = presst;
2869         }
2870         else
2871         {
2872             if (*resp->resultCount)
2873                 *next = 1;
2874             resp->numberOfRecordsReturned = nulint;
2875             resp->presentStatus = 0;
2876         }
2877         resp->nextResultSetPosition = next;
2878         resp->searchStatus = sr;
2879         resp->resultSetStatus = 0;
2880         if (bsrt->estimated_hit_count)
2881         {
2882             resp->resultSetStatus = odr_intdup(assoc->encode,
2883                                                Z_SearchResponse_estimate);
2884         }
2885         else if (bsrt->partial_resultset)
2886         {
2887             resp->resultSetStatus = odr_intdup(assoc->encode,
2888                                                Z_SearchResponse_subset);
2889         }
2890     }
2891     resp->additionalSearchInfo = bsrt->search_info;
2892
2893     if (log_request)
2894     {
2895         int i;
2896         WRBUF wr = wrbuf_alloc();
2897
2898         for (i = 0 ; i < req->num_databaseNames; i++)
2899         {
2900             if (i)
2901                 wrbuf_printf(wr, "+");
2902             wrbuf_puts(wr, req->databaseNames[i]);
2903         }
2904         wrbuf_printf(wr, " ");
2905
2906         if (bsrt->errcode)
2907             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2908         else
2909             wrbuf_printf(wr, "OK " ODR_INT_PRINTF, bsrt->hits);
2910         wrbuf_printf(wr, " %s 1+" ODR_INT_PRINTF " ",
2911                      req->resultSetName, returnedrecs);
2912         yaz_query_to_wrbuf(wr, req->query);
2913
2914         yaz_log(log_request, "Search %s", wrbuf_cstr(wr));
2915         wrbuf_destroy(wr);
2916     }
2917     return apdu;
2918 }
2919
2920 /*
2921  * Maybe we got a little over-friendly when we designed bend_fetch to
2922  * get only one record at a time. Some backends can optimise multiple-record
2923  * fetches, and at any rate, there is some overhead involved in
2924  * all that selecting and hopping around. Problem is, of course, that the
2925  * frontend can't know ahead of time how many records it'll need to
2926  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2927  * is downright lousy as a bulk data transfer protocol.
2928  *
2929  * To start with, we'll do the fetching of records from the backend
2930  * in one operation: To save some trips in and out of the event-handler,
2931  * and to simplify the interface to pack_records. At any rate, asynch
2932  * operation is more fun in operations that have an unpredictable execution
2933  * speed - which is normally more true for search than for present.
2934  */
2935 static Z_APDU *process_presentRequest(association *assoc, request *reqb)
2936 {
2937     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2938     Z_APDU *apdu;
2939     Z_PresentResponse *resp;
2940     Odr_int *next;
2941     Odr_int *num;
2942     int errcode = 0;
2943
2944     yaz_log(log_requestdetail, "Got PresentRequest.");
2945
2946     resp = (Z_PresentResponse *)odr_malloc(assoc->encode, sizeof(*resp));
2947     resp->records = 0;
2948     resp->presentStatus = odr_intdup(assoc->encode, 0);
2949     if (assoc->init->bend_present)
2950     {
2951         bend_present_rr *bprr = (bend_present_rr *)
2952             nmem_malloc(reqb->request_mem, sizeof(*bprr));
2953         bprr->setname = req->resultSetId;
2954         bprr->start = odr_int_to_int(*req->resultSetStartPoint);
2955         bprr->number = odr_int_to_int(*req->numberOfRecordsRequested);
2956         bprr->format = req->preferredRecordSyntax;
2957         bprr->comp = req->recordComposition;
2958         bprr->referenceId = req->referenceId;
2959         bprr->stream = assoc->encode;
2960         bprr->print = assoc->print;
2961         bprr->association = assoc;
2962         bprr->errcode = 0;
2963         bprr->errstring = NULL;
2964         (*assoc->init->bend_present)(assoc->backend, bprr);
2965
2966         if (bprr->errcode)
2967         {
2968             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2969             *resp->presentStatus = Z_PresentStatus_failure;
2970             errcode = bprr->errcode;
2971         }
2972     }
2973     apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
2974     next = odr_intdup(assoc->encode, 0);
2975     num = odr_intdup(assoc->encode, 0);
2976
2977     apdu->which = Z_APDU_presentResponse;
2978     apdu->u.presentResponse = resp;
2979     resp->referenceId = req->referenceId;
2980     resp->otherInfo = 0;
2981
2982     if (!resp->records)
2983     {
2984         *num = *req->numberOfRecordsRequested;
2985         resp->records =
2986             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2987                          num, req->recordComposition, next,
2988                          resp->presentStatus,
2989                          req->referenceId, req->preferredRecordSyntax,
2990                          &errcode);
2991     }
2992     if (log_request)
2993     {
2994         WRBUF wr = wrbuf_alloc();
2995         wrbuf_printf(wr, "Present ");
2996
2997         if (*resp->presentStatus == Z_PresentStatus_failure)
2998             wrbuf_printf(wr, "ERROR %d ", errcode);
2999         else if (*resp->presentStatus == Z_PresentStatus_success)
3000             wrbuf_printf(wr, "OK -  ");
3001         else
3002             wrbuf_printf(wr, "Partial " ODR_INT_PRINTF " - ",
3003                          *resp->presentStatus);
3004
3005         wrbuf_printf(wr, " %s " ODR_INT_PRINTF "+" ODR_INT_PRINTF " ",
3006                 req->resultSetId, *req->resultSetStartPoint,
3007                 *req->numberOfRecordsRequested);
3008         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3009         wrbuf_destroy(wr);
3010     }
3011     if (!resp->records)
3012         return 0;
3013     resp->numberOfRecordsReturned = num;
3014     resp->nextResultSetPosition = next;
3015
3016     return apdu;
3017 }
3018
3019 /*
3020  * Scan was implemented rather in a hurry, and with support for only the basic
3021  * elements of the service in the backend API. Suggestions are welcome.
3022  */
3023 static Z_APDU *process_scanRequest(association *assoc, request *reqb)
3024 {
3025     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
3026     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3027     Z_ScanResponse *res = (Z_ScanResponse *)
3028         odr_malloc(assoc->encode, sizeof(*res));
3029     Odr_int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
3030     Odr_int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
3031     Z_ListEntries *ents = (Z_ListEntries *)
3032         odr_malloc(assoc->encode, sizeof(*ents));
3033     Z_DiagRecs *diagrecs_p = NULL;
3034     bend_scan_rr *bsrr = (bend_scan_rr *)
3035         odr_malloc(assoc->encode, sizeof(*bsrr));
3036     struct scan_entry *save_entries;
3037     int step_size = 0;
3038
3039     yaz_log(log_requestdetail, "Got ScanRequest");
3040
3041     apdu->which = Z_APDU_scanResponse;
3042     apdu->u.scanResponse = res;
3043     res->referenceId = req->referenceId;
3044
3045     /* if step is absent, set it to 0 */
3046     if (req->stepSize)
3047         step_size = odr_int_to_int(*req->stepSize);
3048
3049     res->stepSize = 0;
3050     res->scanStatus = scanStatus;
3051     res->numberOfEntriesReturned = numberOfEntriesReturned;
3052     res->positionOfTerm = 0;
3053     res->entries = ents;
3054     ents->num_entries = 0;
3055     ents->entries = NULL;
3056     ents->num_nonsurrogateDiagnostics = 0;
3057     ents->nonsurrogateDiagnostics = NULL;
3058     res->attributeSet = 0;
3059     res->otherInfo = 0;
3060
3061     if (req->databaseNames)
3062     {
3063         int i;
3064         for (i = 0; i < req->num_databaseNames; i++)
3065             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
3066     }
3067     bsrr->scanClause = 0;
3068     bsrr->errcode = 0;
3069     bsrr->errstring = 0;
3070     bsrr->num_bases = req->num_databaseNames;
3071     bsrr->basenames = req->databaseNames;
3072     bsrr->num_entries = odr_int_to_int(*req->numberOfTermsRequested);
3073     bsrr->term = req->termListAndStartPoint;
3074     bsrr->referenceId = req->referenceId;
3075     bsrr->stream = assoc->encode;
3076     bsrr->print = assoc->print;
3077     bsrr->step_size = &step_size;
3078     bsrr->setname = yaz_oi_get_string_oid(&req->otherInfo,
3079                                           yaz_oid_userinfo_scan_set, 1, 0);
3080     bsrr->entries = 0;
3081     bsrr->extra_args = 0;
3082     bsrr->extra_response_data = 0;
3083     /* For YAZ 2.0 and earlier it was the backend handler that
3084        initialized entries (member display_term did not exist)
3085        YAZ 2.0 and later sets 'entries'  and initialize all members
3086        including 'display_term'. If YAZ 2.0 or later sees that
3087        entries was modified - we assume that it is an old handler and
3088        that 'display_term' is _not_ set.
3089     */
3090     if (bsrr->num_entries > 0)
3091     {
3092         int i;
3093         bsrr->entries = (struct scan_entry *)
3094             odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3095                        bsrr->num_entries);
3096         for (i = 0; i<bsrr->num_entries; i++)
3097         {
3098             bsrr->entries[i].term = 0;
3099             bsrr->entries[i].occurrences = 0;
3100             bsrr->entries[i].errcode = 0;
3101             bsrr->entries[i].errstring = 0;
3102             bsrr->entries[i].display_term = 0;
3103         }
3104     }
3105     save_entries = bsrr->entries;  /* save it so we can compare later */
3106
3107     bsrr->attributeset = req->attributeSet;
3108     log_scan_term_level(log_requestdetail, req->termListAndStartPoint,
3109                         bsrr->attributeset);
3110     bsrr->term_position = req->preferredPositionInResponse ?
3111         odr_int_to_int(*req->preferredPositionInResponse) : 1;
3112
3113     ((int (*)(void *, bend_scan_rr *))
3114      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3115
3116     if (bsrr->errcode)
3117         diagrecs_p = zget_DiagRecs(assoc->encode,
3118                                    bsrr->errcode, bsrr->errstring);
3119     else
3120     {
3121         int i;
3122         Z_Entry **tab = (Z_Entry **)
3123             odr_malloc(assoc->encode, sizeof(*tab) * bsrr->num_entries);
3124
3125         if (bsrr->status == BEND_SCAN_PARTIAL)
3126             *scanStatus = Z_Scan_partial_5;
3127         else
3128             *scanStatus = Z_Scan_success;
3129         res->stepSize = odr_intdup(assoc->encode, step_size);
3130         ents->entries = tab;
3131         ents->num_entries = bsrr->num_entries;
3132         res->numberOfEntriesReturned = odr_intdup(assoc->encode,
3133                                                    ents->num_entries);
3134         res->positionOfTerm = odr_intdup(assoc->encode, bsrr->term_position);
3135         for (i = 0; i < bsrr->num_entries; i++)
3136         {
3137             Z_Entry *e;
3138             Z_TermInfo *t;
3139
3140             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3141             if (bsrr->entries[i].occurrences >= 0)
3142             {
3143                 e->which = Z_Entry_termInfo;
3144                 e->u.termInfo = t = (Z_TermInfo *)
3145                     odr_malloc(assoc->encode, sizeof(*t));
3146                 t->suggestedAttributes = 0;
3147                 t->displayTerm = 0;
3148                 if (save_entries == bsrr->entries &&
3149                     bsrr->entries[i].display_term)
3150                 {
3151                     /* the entries was _not_ set by the handler. So it's
3152                        safe to test for new member display_term. It is
3153                        NULL'ed by us.
3154                     */
3155                     t->displayTerm = odr_strdup(assoc->encode,
3156                                                 bsrr->entries[i].display_term);
3157                 }
3158                 t->alternativeTerm = 0;
3159                 t->byAttributes = 0;
3160                 t->otherTermInfo = 0;
3161                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3162                 t->term = (Z_Term *)
3163                     odr_malloc(assoc->encode, sizeof(*t->term));
3164                 t->term->which = Z_Term_general;
3165                 t->term->u.general =
3166                     odr_create_Odr_oct(assoc->encode,
3167                                        bsrr->entries[i].term,
3168                                        strlen(bsrr->entries[i].term));
3169                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (" ODR_INT_PRINTF ")", i,
3170                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3171             }
3172             else
3173             {
3174                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3175                                                   bsrr->entries[i].errcode,
3176                                                   bsrr->entries[i].errstring);
3177                 assert(drecs->num_diagRecs == 1);
3178                 e->which = Z_Entry_surrogateDiagnostic;
3179                 assert(drecs->diagRecs[0]);
3180                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3181             }
3182         }
3183     }
3184     if (diagrecs_p)
3185     {
3186         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3187         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3188     }
3189     if (log_request)
3190     {
3191         int i;
3192         WRBUF wr = wrbuf_alloc();
3193         wrbuf_printf(wr, "Scan ");
3194         for (i = 0 ; i < req->num_databaseNames; i++)
3195         {
3196             if (i)
3197                 wrbuf_printf(wr, "+");
3198             wrbuf_puts(wr, req->databaseNames[i]);
3199         }
3200
3201         wrbuf_printf(wr, " ");
3202
3203         if (bsrr->errcode)
3204             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3205         else
3206             wrbuf_printf(wr, "OK");
3207
3208         wrbuf_printf(wr, " " ODR_INT_PRINTF " - " ODR_INT_PRINTF "+"
3209                      ODR_INT_PRINTF "+" ODR_INT_PRINTF,
3210                      res->numberOfEntriesReturned ?
3211                      *res->numberOfEntriesReturned : 0,
3212                      (req->preferredPositionInResponse ?
3213                       *req->preferredPositionInResponse : 1),
3214                      *req->numberOfTermsRequested,
3215                      (res->stepSize ? *res->stepSize : 1));
3216
3217         if (bsrr->setname)
3218             wrbuf_printf(wr, "+%s", bsrr->setname);
3219
3220         wrbuf_printf(wr, " ");
3221         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3222                           bsrr->attributeset);
3223         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3224         wrbuf_destroy(wr);
3225     }
3226     return apdu;
3227 }
3228
3229 static Z_APDU *process_sortRequest(association *assoc, request *reqb)
3230 {
3231     int i;
3232     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3233     Z_SortResponse *res = (Z_SortResponse *)
3234         odr_malloc(assoc->encode, sizeof(*res));
3235     bend_sort_rr *bsrr = (bend_sort_rr *)
3236         odr_malloc(assoc->encode, sizeof(*bsrr));
3237
3238     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3239
3240     yaz_log(log_requestdetail, "Got SortRequest.");
3241
3242     bsrr->num_input_setnames = req->num_inputResultSetNames;
3243     for (i=0;i<req->num_inputResultSetNames;i++)
3244         yaz_log(log_requestdetail, "Input resultset: '%s'",
3245                 req->inputResultSetNames[i]);
3246     bsrr->input_setnames = req->inputResultSetNames;
3247     bsrr->referenceId = req->referenceId;
3248     bsrr->output_setname = req->sortedResultSetName;
3249     yaz_log(log_requestdetail, "Output resultset: '%s'",
3250                 req->sortedResultSetName);
3251     bsrr->sort_sequence = req->sortSequence;
3252        /*FIXME - dump those sequences too */
3253     bsrr->stream = assoc->encode;
3254     bsrr->print = assoc->print;
3255
3256     bsrr->sort_status = Z_SortResponse_failure;
3257     bsrr->errcode = 0;
3258     bsrr->errstring = 0;
3259
3260     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3261
3262     res->referenceId = bsrr->referenceId;
3263     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3264     res->resultSetStatus = 0;
3265     if (bsrr->errcode)
3266     {
3267         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3268                                        bsrr->errcode, bsrr->errstring);
3269         res->diagnostics = dr->diagRecs;
3270         res->num_diagnostics = dr->num_diagRecs;
3271     }
3272     else
3273     {
3274         res->num_diagnostics = 0;
3275         res->diagnostics = 0;
3276     }
3277     res->resultCount = 0;
3278     res->otherInfo = 0;
3279
3280     apdu->which = Z_APDU_sortResponse;
3281     apdu->u.sortResponse = res;
3282     if (log_request)
3283     {
3284         WRBUF wr = wrbuf_alloc();
3285         wrbuf_printf(wr, "Sort ");
3286         if (bsrr->errcode)
3287             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3288         else
3289             wrbuf_printf(wr,  "OK -");
3290         wrbuf_printf(wr, " (");
3291         for (i = 0; i<req->num_inputResultSetNames; i++)
3292         {
3293             if (i)
3294                 wrbuf_printf(wr, "+");
3295             wrbuf_puts(wr, req->inputResultSetNames[i]);
3296         }
3297         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3298
3299         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3300         wrbuf_destroy(wr);
3301     }
3302     return apdu;
3303 }
3304
3305 static Z_APDU *process_deleteRequest(association *assoc, request *reqb)
3306 {
3307     int i;
3308     Z_DeleteResultSetRequest *req =
3309         reqb->apdu_request->u.deleteResultSetRequest;
3310     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3311         odr_malloc(assoc->encode, sizeof(*res));
3312     bend_delete_rr *bdrr = (bend_delete_rr *)
3313         odr_malloc(assoc->encode, sizeof(*bdrr));
3314     Z_APDU *apdu = (Z_APDU *)odr_malloc(assoc->encode, sizeof(*apdu));
3315
3316     yaz_log(log_requestdetail, "Got DeleteRequest.");
3317
3318     bdrr->num_setnames = req->num_resultSetList;
3319     bdrr->setnames = req->resultSetList;
3320     for (i = 0; i<req->num_resultSetList; i++)
3321         yaz_log(log_requestdetail, "resultset: '%s'",
3322                 req->resultSetList[i]);
3323     bdrr->stream = assoc->encode;
3324     bdrr->print = assoc->print;
3325     bdrr->function = odr_int_to_int(*req->deleteFunction);
3326     bdrr->referenceId = req->referenceId;
3327     bdrr->statuses = 0;
3328     if (bdrr->num_setnames > 0)
3329     {
3330         bdrr->statuses = (int*)
3331             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3332                        bdrr->num_setnames);
3333         for (i = 0; i < bdrr->num_setnames; i++)
3334             bdrr->statuses[i] = 0;
3335     }
3336     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3337
3338     res->referenceId = req->referenceId;
3339
3340     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3341
3342     res->deleteListStatuses = 0;
3343     if (bdrr->num_setnames > 0)
3344     {
3345         int i;
3346         res->deleteListStatuses = (Z_ListStatuses *)
3347             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3348         res->deleteListStatuses->num = bdrr->num_setnames;
3349         res->deleteListStatuses->elements =
3350             (Z_ListStatus **)
3351             odr_malloc(assoc->encode,
3352                         sizeof(*res->deleteListStatuses->elements) *
3353                         bdrr->num_setnames);
3354         for (i = 0; i<bdrr->num_setnames; i++)
3355         {
3356             res->deleteListStatuses->elements[i] =
3357                 (Z_ListStatus *)
3358                 odr_malloc(assoc->encode,
3359                             sizeof(**res->deleteListStatuses->elements));
3360             res->deleteListStatuses->elements[i]->status =
3361                 odr_intdup(assoc->encode, bdrr->statuses[i]);
3362             res->deleteListStatuses->elements[i]->id =
3363                 odr_strdup(assoc->encode, bdrr->setnames[i]);
3364         }
3365     }
3366     res->numberNotDeleted = 0;
3367     res->bulkStatuses = 0;
3368     res->deleteMessage = 0;
3369     res->otherInfo = 0;
3370
3371     apdu->which = Z_APDU_deleteResultSetResponse;
3372     apdu->u.deleteResultSetResponse = res;
3373     if (log_request)
3374     {
3375         WRBUF wr = wrbuf_alloc();
3376         wrbuf_printf(wr, "Delete ");
3377         if (bdrr->delete_status)
3378             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3379         else
3380             wrbuf_printf(wr, "OK -");
3381         for (i = 0; i<req->num_resultSetList; i++)
3382             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3383         yaz_log(log_request, "%s", wrbuf_cstr(wr) );
3384         wrbuf_destroy(wr);
3385     }
3386     return apdu;
3387 }
3388
3389 static void process_close(association *assoc, request *reqb)
3390 {
3391     Z_Close *req = reqb->apdu_request->u.close;
3392     static char *reasons[] =
3393     {
3394         "finished",
3395         "shutdown",
3396         "systemProblem",
3397         "costLimit",
3398         "resources",
3399         "securityViolation",
3400         "protocolError",
3401         "lackOfActivity",
3402         "peerAbort",
3403         "unspecified"
3404     };
3405
3406     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3407         reasons[*req->closeReason], req->diagnosticInformation ?
3408         req->diagnosticInformation : "NULL");
3409     if (assoc->version < 3) /* to make do_force respond with close */
3410         assoc->version = 3;
3411     do_close_req(assoc, Z_Close_finished,
3412                  "Association terminated by client", reqb);
3413     yaz_log(log_request,"Close OK");
3414 }
3415
3416 static Z_APDU *process_segmentRequest(association *assoc, request *reqb)
3417 {
3418     bend_segment_rr req;
3419
3420     req.segment = reqb->apdu_request->u.segmentRequest;
3421     req.stream = assoc->encode;
3422     req.decode = assoc->decode;
3423     req.print = assoc->print;
3424     req.association = assoc;
3425
3426     (*assoc->init->bend_segment)(assoc->backend, &req);
3427
3428     return 0;
3429 }
3430
3431 static Z_APDU *process_ESRequest(association *assoc, request *reqb)
3432 {
3433     bend_esrequest_rr esrequest;
3434     const char *ext_name = "unknown";
3435
3436     Z_ExtendedServicesRequest *req =
3437         reqb->apdu_request->u.extendedServicesRequest;
3438     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3439
3440     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3441
3442     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3443     esrequest.stream = assoc->encode;
3444     esrequest.decode = assoc->decode;
3445     esrequest.print = assoc->print;
3446     esrequest.errcode = 0;
3447     esrequest.errstring = NULL;
3448     esrequest.association = assoc;
3449     esrequest.taskPackage = 0;
3450     esrequest.referenceId = req->referenceId;
3451
3452     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3453     {
3454         switch(esrequest.esr->taskSpecificParameters->which)
3455         {
3456         case Z_External_itemOrder:
3457             ext_name = "ItemOrder"; break;
3458         case Z_External_update:
3459             ext_name = "Update"; break;
3460         case Z_External_update0:
3461             ext_name = "Update0"; break;
3462         case Z_External_ESAdmin:
3463             ext_name = "Admin"; break;
3464
3465         }
3466     }
3467
3468     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3469
3470     resp->referenceId = req->referenceId;
3471
3472     if (esrequest.errcode == -1)
3473     {
3474         /* Backend service indicates request will be processed */
3475         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3476         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3477     }
3478     else if (esrequest.errcode == 0)
3479     {
3480         /* Backend service indicates request will be processed */
3481         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3482         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3483     }
3484     else
3485     {
3486         Z_DiagRecs *diagRecs =
3487             zget_DiagRecs(assoc->encode, esrequest.errcode,
3488                           esrequest.errstring);
3489         /* Backend indicates error, request will not be processed */
3490         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3491         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3492         resp->num_diagnostics = diagRecs->num_diagRecs;
3493         resp->diagnostics = diagRecs->diagRecs;
3494         if (log_request)
3495         {
3496             WRBUF wr = wrbuf_alloc();
3497             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3498             yaz_log(log_request, "EsRequest %s", wrbuf_cstr(wr) );
3499             wrbuf_destroy(wr);
3500         }
3501
3502     }
3503     /* Do something with the members of bend_extendedservice */
3504     if (esrequest.taskPackage)
3505     {
3506         resp->taskPackage = z_ext_record_oid(
3507             assoc->encode, yaz_oid_recsyn_extended,
3508             (const char *)  esrequest.taskPackage, -1);
3509     }
3510     yaz_log(YLOG_DEBUG,"Send the result apdu");
3511     return apdu;
3512 }
3513
3514 int bend_assoc_is_alive(bend_association assoc)
3515 {
3516     if (assoc->state == ASSOC_DEAD)
3517         return 0; /* already marked as dead. Don't check I/O chan anymore */
3518
3519     return iochan_is_alive(assoc->client_chan);
3520 }
3521
3522
3523 /*
3524  * Local variables:
3525  * c-basic-offset: 4
3526  * c-file-style: "Stroustrup"
3527  * indent-tabs-mode: nil
3528  * End:
3529  * vim: shiftwidth=4 tabstop=8 expandtab
3530  */
3531