src/filter_sru_to_z3950.cpp

   1 /* $Id: filter_sru_to_z3950.cpp,v 1.26 2007-01-08 11:10:06 marc Exp $
   2    Copyright (c) 2005-2006, Index Data.
   3
   4    See the LICENSE file for details
   5 */
   6
   7 #include "config.hpp"
   8 #include "filter.hpp"
   9 #include "package.hpp"
  10 #include "util.hpp"
  11 #include "gduutil.hpp"
  12 #include "sru_util.hpp"
  13 #include "filter_sru_to_z3950.hpp"
  14
  15 #include <yaz/zgdu.h>
  16 #include <yaz/z-core.h>
  17 #include <yaz/srw.h>
  18 #include <yaz/pquery.h>
  19
  20 #include <boost/thread/mutex.hpp>
  21
  22 #include <iostream>
  23 #include <sstream>
  24 #include <string>
  25 #include <algorithm>
  26 #include <map>
  27
  28 namespace mp = metaproxy_1;
  29 namespace mp_util = metaproxy_1::util;
  30 namespace yf = mp::filter;
  31
  32
  33 namespace metaproxy_1 {
  34     namespace filter {
  35         class SRUtoZ3950::Impl {
  36         public:
  37             void configure(const xmlNode *xmlnode);
  38             void process(metaproxy_1::Package &package);
  39         private:
  40             union SRW_query {char * cql; char * xcql; char * pqf;};
  41             typedef const int& SRW_query_type;
  42             std::map<std::string, const xmlNode *> m_database_explain;
  43         private:
  44
  45             bool z3950_build_query(mp::odr &odr_en, Z_Query *z_query,
  46                                    const SRW_query &query,
  47                                    SRW_query_type query_type) const;
  48
  49             bool z3950_init_request(mp::Package &package,
  50                                          const std::string
  51                                          &database = "Default") const;
  52
  53             bool z3950_close_request(mp::Package &package) const;
  54
  55             bool z3950_search_request(mp::Package &package,
  56                                       mp::odr &odr_en,
  57                                       Z_SRW_PDU *sru_pdu_res,
  58                                       Z_SRW_searchRetrieveRequest
  59                                           const *sr_req) const;
  60
  61             bool z3950_present_request(mp::Package &package,
  62                                        mp::odr &odr_en,
  63                                        Z_SRW_PDU *sru_pdu_res,
  64                                        Z_SRW_searchRetrieveRequest
  65                                        const *sr_req) const;
  66
  67             bool z3950_scan_request(mp::Package &package,
  68                                     mp::odr &odr_en,
  69                                     Z_SRW_PDU *sru_pdu_res,
  70                                     Z_SRW_scanRequest
  71                                     const *sr_req) const;
  72
  73
  74             int z3950_to_srw_diag(mp::odr &odr_en,
  75                                   Z_SRW_searchRetrieveResponse *srw_res,
  76                                   Z_DefaultDiagFormat *ddf) const;
  77         };
  78     }
  79 }
  80
  81 yf::SRUtoZ3950::SRUtoZ3950() : m_p(new Impl)
  82 {
  83 }
  84
  85 yf::SRUtoZ3950::~SRUtoZ3950()
  86 {  // must have a destructor because of boost::scoped_ptr
  87 }
  88
  89 void yf::SRUtoZ3950::configure(const xmlNode *xmlnode)
  90 {
  91     m_p->configure(xmlnode);
  92 }
  93
  94 void yf::SRUtoZ3950::process(mp::Package &package) const
  95 {
  96     m_p->process(package);
  97 }
  98
  99 void yf::SRUtoZ3950::Impl::configure(const xmlNode *confignode)
 100 {
 101     const xmlNode * dbnode;
 102
 103     for (dbnode = confignode->children; dbnode; dbnode = dbnode->next){
 104         if (dbnode->type != XML_ELEMENT_NODE)
 105             continue;
 106
 107         std::string database;
 108         mp::xml::check_element_mp(dbnode, "database");
 109
 110         for (struct _xmlAttr *attr = dbnode->properties;
 111              attr; attr = attr->next){
 112
 113             mp::xml::check_attribute(attr, "", "name");
 114             database = mp::xml::get_text(attr);
 115
 116             const xmlNode *explainnode;
 117             for (explainnode = dbnode->children;
 118                  explainnode; explainnode = explainnode->next){
 119                 if (explainnode->type != XML_ELEMENT_NODE)
 120                     continue;
 121                 if (explainnode)
 122                     break;
 123             }
 124             // assigning explain node to database name - no check yet
 125             m_database_explain.insert(std::make_pair(database, explainnode));
 126          }
 127     }
 128 }
 129
 130 void yf::SRUtoZ3950::Impl::process(mp::Package &package)
 131 {
 132     Z_GDU *zgdu_req = package.request().get();
 133
 134     // ignoring all non HTTP_Request packages
 135     if (!zgdu_req || !(zgdu_req->which == Z_GDU_HTTP_Request)){
 136         package.move();
 137         return;
 138     }
 139
 140     // only working on  HTTP_Request packages now
 141
 142     bool ok = true;
 143
 144     mp::odr odr_de(ODR_DECODE);
 145     Z_SRW_PDU *sru_pdu_req = 0;
 146
 147     mp::odr odr_en(ODR_ENCODE);
 148     Z_SRW_PDU *sru_pdu_res = yaz_srw_get(odr_en, Z_SRW_explain_response);
 149
 150     // determine database with the HTTP header information only
 151     mp_util::SRUServerInfo sruinfo = mp_util::get_sru_server_info(package);
 152     std::map<std::string, const xmlNode *>::iterator idbexp;
 153     idbexp = m_database_explain.find(sruinfo.database);
 154
 155     // assign explain config XML DOM node if database is known
 156     const xmlNode *explainnode = 0;
 157     if (idbexp != m_database_explain.end()){
 158         explainnode = idbexp->second;
 159     }
 160     // just moving package if database is not known
 161     else {
 162         package.move();
 163         return;
 164     }
 165
 166
 167     // decode SRU request
 168     Z_SOAP *soap = 0;
 169     char *charset = 0;
 170     char *stylesheet = 0;
 171
 172     // filter acts as sink for non-valid SRU requests
 173     if (! (sru_pdu_req = mp_util::decode_sru_request(package, odr_de, odr_en,
 174                                             sru_pdu_res, soap,
 175                                             charset, stylesheet)))
 176     {
 177         mp_util::build_sru_explain(package, odr_en, sru_pdu_res,
 178                                    sruinfo, explainnode);
 179         mp_util::build_sru_response(package, odr_en, soap,
 180                            sru_pdu_res, charset, stylesheet);
 181         package.session().close();
 182         return;
 183     }
 184
 185     // filter acts as sink for SRU explain requests
 186     if (sru_pdu_req && sru_pdu_req->which == Z_SRW_explain_request)
 187     {
 188         Z_SRW_explainRequest *er_req = sru_pdu_req->u.explain_request;
 189         //mp_util::build_simple_explain(package, odr_en, sru_pdu_res,
 190         //                           sruinfo, er_req);
 191         mp_util::build_sru_explain(package, odr_en, sru_pdu_res,
 192                                    sruinfo, explainnode, er_req);
 193         mp_util::build_sru_response(package, odr_en, soap,
 194                                     sru_pdu_res, charset, stylesheet);
 195         return;
 196     }
 197
 198     // searchRetrieve
 199     else if (sru_pdu_req
 200         && sru_pdu_req->which == Z_SRW_searchRetrieve_request
 201         && sru_pdu_req->u.request)
 202     {
 203         Z_SRW_searchRetrieveRequest *sr_req = sru_pdu_req->u.request;
 204
 205         sru_pdu_res = yaz_srw_get(odr_en, Z_SRW_searchRetrieve_response);
 206
 207         // checking that we have a query
 208         ok = mp_util::check_sru_query_exists(package, odr_en,
 209                                              sru_pdu_res, sr_req);
 210
 211         if (ok && z3950_init_request(package))
 212         {
 213             {
 214                 ok = z3950_search_request(package, odr_en,
 215                                           sru_pdu_res, sr_req);
 216
 217                 if (ok
 218                     && sru_pdu_res->u.response->numberOfRecords
 219                     && *(sru_pdu_res->u.response->numberOfRecords)
 220                     && sr_req->maximumRecords
 221                     && *(sr_req->maximumRecords))
 222
 223                     ok = z3950_present_request(package, odr_en,
 224                                                sru_pdu_res,
 225                                                sr_req);
 226                 z3950_close_request(package);
 227             }
 228         }
 229     }
 230
 231     // scan
 232     else if (sru_pdu_req
 233              && sru_pdu_req->which == Z_SRW_scan_request
 234              && sru_pdu_req->u.scan_request)
 235     {
 236         Z_SRW_scanRequest  *sr_req = sru_pdu_req->u.scan_request;
 237
 238         sru_pdu_res = yaz_srw_get(odr_en, Z_SRW_scan_response);
 239
 240         // we do not do scan at the moment, therefore issuing a diagnostic
 241         yaz_add_srw_diagnostic(odr_en,
 242                                &(sru_pdu_res->u.scan_response->diagnostics),
 243                                &(sru_pdu_res->u.scan_response->num_diagnostics),
 244                                4, "scan");
 245
 246         // to be used when we do scan
 247         if (false && z3950_init_request(package))
 248         {
 249             z3950_scan_request(package, odr_en, sru_pdu_res, sr_req);
 250             z3950_close_request(package);
 251         }
 252     }
 253     else
 254     {
 255         //std::cout << "SRU OPERATION NOT SUPPORTED \n";
 256         sru_pdu_res = yaz_srw_get(odr_en, Z_SRW_explain_response);
 257
 258         // TODO: make nice diagnostic return package
 259         package.session().close();
 260         return;
 261     }
 262
 263     // build and send SRU response
 264     mp_util::build_sru_response(package, odr_en, soap,
 265                                 sru_pdu_res, charset, stylesheet);
 266     return;
 267 }
 268
 269
 270
 271 bool
 272 yf::SRUtoZ3950::Impl::z3950_init_request(mp::Package &package,
 273                                          const std::string &database) const
 274 {
 275     // prepare Z3950 package
 276     Package z3950_package(package.session(), package.origin());
 277     z3950_package.copy_filter(package);
 278
 279     // set initRequest APDU
 280     mp::odr odr_en(ODR_ENCODE);
 281     Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_initRequest);
 282     Z_InitRequest *init_req = apdu->u.initRequest;
 283     //TODO: add user name in apdu
 284     //TODO: add user passwd in apdu
 285     //init_req->idAuthentication = org_init->idAuthentication;
 286     //init_req->implementationId = "IDxyz";
 287     //init_req->implementationName = "NAMExyz";
 288     //init_req->implementationVersion = "VERSIONxyz";
 289
 290     ODR_MASK_SET(init_req->options, Z_Options_search);
 291     ODR_MASK_SET(init_req->options, Z_Options_present);
 292     ODR_MASK_SET(init_req->options, Z_Options_namedResultSets);
 293     ODR_MASK_SET(init_req->options, Z_Options_scan);
 294
 295     ODR_MASK_SET(init_req->protocolVersion, Z_ProtocolVersion_1);
 296     ODR_MASK_SET(init_req->protocolVersion, Z_ProtocolVersion_2);
 297     ODR_MASK_SET(init_req->protocolVersion, Z_ProtocolVersion_3);
 298
 299     z3950_package.request() = apdu;
 300
 301     // send Z3950 package
 302     z3950_package.move();
 303
 304     // dead Z3950 backend detection
 305     if (z3950_package.session().is_closed()){
 306         package.session().close();
 307         return false;
 308     }
 309
 310     // check successful initResponse
 311     Z_GDU *z3950_gdu = z3950_package.response().get();
 312
 313     if (z3950_gdu && z3950_gdu->which == Z_GDU_Z3950
 314         && z3950_gdu->u.z3950->which == Z_APDU_initResponse)
 315          return true;
 316
 317     return false;
 318 }
 319
 320 bool
 321 yf::SRUtoZ3950::Impl::z3950_close_request(mp::Package &package) const
 322 {
 323     // close SRU package
 324     package.session().close();
 325
 326     // prepare and close Z3950 package
 327     Package z3950_package(package.session(), package.origin());
 328     z3950_package.copy_filter(package);
 329     z3950_package.session().close();
 330
 331     // set close APDU
 332     //mp::odr odr_en(ODR_ENCODE);
 333     //Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_close);
 334     //z3950_package.request() = apdu;
 335
 336     z3950_package.move();
 337
 338     // check successful close response
 339     //Z_GDU *z3950_gdu = z3950_package.response().get();
 340     //if (z3950_gdu && z3950_gdu->which == Z_GDU_Z3950
 341     //    && z3950_gdu->u.z3950->which == Z_APDU_close)
 342     //    return true;
 343
 344     if (z3950_package.session().is_closed()){
 345         return true;
 346     }
 347     return false;
 348 }
 349
 350 bool
 351 yf::SRUtoZ3950::Impl::z3950_search_request(mp::Package &package,
 352                                           mp::odr &odr_en,
 353                                           Z_SRW_PDU *sru_pdu_res,
 354                                           Z_SRW_searchRetrieveRequest
 355                                           const *sr_req) const
 356 {
 357
 358     assert(sru_pdu_res->u.response);
 359
 360     Package z3950_package(package.session(), package.origin());
 361     z3950_package.copy_filter(package);
 362
 363     //add stuff in z3950 apdu
 364     Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_searchRequest);
 365     Z_SearchRequest *z_searchRequest = apdu->u.searchRequest;
 366
 367     // z3950'fy database
 368     z_searchRequest->num_databaseNames = 1;
 369     z_searchRequest->databaseNames = (char**)
 370         odr_malloc(odr_en, sizeof(char *));
 371
 372     if (sr_req->database)
 373         z_searchRequest->databaseNames[0]
 374             = odr_strdup(odr_en, const_cast<char *>(sr_req->database));
 375     else
 376         z_searchRequest->databaseNames[0]
 377             = odr_strdup(odr_en, "Default");
 378
 379
 380     // z3950'fy query
 381     Z_Query *z_query = (Z_Query *) odr_malloc(odr_en, sizeof(Z_Query));
 382     z_searchRequest->query = z_query;
 383
 384     if (!z3950_build_query(odr_en, z_query,
 385                            (const SRW_query&)sr_req->query,
 386                            sr_req->query_type))
 387     {
 388         yaz_add_srw_diagnostic(odr_en,
 389                                &(sru_pdu_res->u.response->diagnostics),
 390                                &(sru_pdu_res->u.response->num_diagnostics),
 391                                7, "query");
 392         return false;
 393     }
 394
 395     z3950_package.request() = apdu;
 396
 397     // send Z39.50 package off to backend
 398     z3950_package.move();
 399
 400
 401     Z_GDU *z3950_gdu = z3950_package.response().get();
 402
 403     //TODO: check success condition
 404
 405     //int yaz_diag_bib1_to_srw (int bib1_code);
 406     //int yaz_diag_srw_to_bib1(int srw_code);
 407     //Se kode i src/seshigh.c (srw_bend_search, srw_bend_init).
 408
 409     if (z3950_gdu && z3950_gdu->which == Z_GDU_Z3950
 410         && z3950_gdu->u.z3950->which == Z_APDU_searchResponse
 411         && z3950_gdu->u.z3950->u.searchResponse->searchStatus)
 412     {
 413
 414         Z_SearchResponse *sr = z3950_gdu->u.z3950->u.searchResponse;
 415         if (sr)
 416         {
 417             // srw'fy number of records
 418             sru_pdu_res->u.response->numberOfRecords
 419                 = (int *) odr_malloc(odr_en, sizeof(int *));
 420             *(sru_pdu_res->u.response->numberOfRecords) = *(sr->resultCount);
 421
 422             // srw'fy nextRecordPosition
 423             //sru_pdu_res->u.response->nextRecordPosition
 424             //    = (int *) odr_malloc(odr_en, sizeof(int *));
 425             //*(sru_pdu_res->u.response->nextRecordPosition) = 1;
 426
 427         }
 428
 429         return true;
 430     }
 431
 432     return false;
 433 }
 434
 435 bool
 436 yf::SRUtoZ3950::Impl::z3950_present_request(mp::Package &package,
 437                                            mp::odr &odr_en,
 438                                            Z_SRW_PDU *sru_pdu_res,
 439                                            Z_SRW_searchRetrieveRequest
 440                                            const *sr_req)
 441     const
 442 {
 443     assert(sru_pdu_res->u.response);
 444
 445     if (!sr_req)
 446         return false;
 447
 448
 449     // no need to work if nobody wants record ..
 450     if (!(sr_req->maximumRecords) || 0 == *(sr_req->maximumRecords))
 451         return true;
 452
 453     bool send_z3950_present = true;
 454
 455     // recordXPath unsupported.
 456     if (sr_req->recordXPath)
 457     {
 458         send_z3950_present = false;
 459         yaz_add_srw_diagnostic(odr_en,
 460                                &(sru_pdu_res->u.response->diagnostics),
 461                                &(sru_pdu_res->u.response->num_diagnostics),
 462                                72, 0);
 463     }
 464
 465     // resultSetTTL unsupported.
 466     // resultSetIdleTime in response
 467     if (sr_req->resultSetTTL)
 468     {
 469         send_z3950_present = false;
 470         yaz_add_srw_diagnostic(odr_en,
 471                                &(sru_pdu_res->u.response->diagnostics),
 472                                &(sru_pdu_res->u.response->num_diagnostics),
 473                                50, 0);
 474     }
 475
 476     // sort unsupported
 477     if (sr_req->sort_type != Z_SRW_sort_type_none)
 478     {
 479         send_z3950_present = false;
 480         yaz_add_srw_diagnostic(odr_en,
 481                                &(sru_pdu_res->u.response->diagnostics),
 482                                &(sru_pdu_res->u.response->num_diagnostics),
 483                                80, 0);
 484     }
 485
 486     // start record requested negative, or larger than number of records
 487     if (sr_req->startRecord
 488         &&
 489         ((*(sr_req->startRecord) < 0)       // negative
 490          ||
 491          (sru_pdu_res->u.response->numberOfRecords  //out of range
 492           && *(sr_req->startRecord)
 493           > *(sru_pdu_res->u.response->numberOfRecords))
 494         ))
 495     {
 496         send_z3950_present = false;
 497         yaz_add_srw_diagnostic(odr_en,
 498                                &(sru_pdu_res->u.response->diagnostics),
 499                                &(sru_pdu_res->u.response->num_diagnostics),
 500                                61, 0);
 501     }
 502
 503     // maximumRecords requested negative
 504     if (sr_req->maximumRecords
 505         && *(sr_req->maximumRecords) < 0)
 506
 507     {
 508         send_z3950_present = false;
 509         yaz_add_srw_diagnostic(odr_en,
 510                                &(sru_pdu_res->u.response->diagnostics),
 511                                &(sru_pdu_res->u.response->num_diagnostics),
 512                                6, "maximumRecords");
 513     }
 514
 515     // exit on all these above diagnostics
 516     if (!send_z3950_present)
 517         return false;
 518
 519     // now packaging the z3950 present request
 520     Package z3950_package(package.session(), package.origin());
 521     z3950_package.copy_filter(package);
 522     Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_presentRequest);
 523
 524     assert(apdu->u.presentRequest);
 525
 526     // z3950'fy start record position
 527     if (sr_req->startRecord)
 528         *(apdu->u.presentRequest->resultSetStartPoint)
 529             = *(sr_req->startRecord);
 530     else
 531         *(apdu->u.presentRequest->resultSetStartPoint) = 1;
 532
 533     // z3950'fy number of records requested
 534     // protect against requesting records out of range
 535     if (sr_req->maximumRecords)
 536         *(apdu->u.presentRequest->numberOfRecordsRequested)
 537             = std::min(*(sr_req->maximumRecords),
 538                   *(sru_pdu_res->u.response->numberOfRecords)
 539                   - *(apdu->u.presentRequest->resultSetStartPoint)
 540                   + 1);
 541
 542     // z3950'fy recordPacking
 543     int record_packing = Z_SRW_recordPacking_XML;
 544     if (sr_req->recordPacking && 's' == *(sr_req->recordPacking))
 545         record_packing = Z_SRW_recordPacking_string;
 546
 547     // RecordSyntax will always be XML
 548     (apdu->u.presentRequest->preferredRecordSyntax)
 549         = yaz_oidval_to_z3950oid (odr_en, CLASS_RECSYN, VAL_TEXT_XML);
 550
 551     // z3950'fy record schema
 552      if (sr_req->recordSchema)
 553      {
 554          apdu->u.presentRequest->recordComposition
 555              = (Z_RecordComposition *)
 556                odr_malloc(odr_en, sizeof(Z_RecordComposition));
 557          apdu->u.presentRequest->recordComposition->which
 558              = Z_RecordComp_simple;
 559          apdu->u.presentRequest->recordComposition->u.simple
 560              = mp_util::build_esn_from_schema(odr_en,
 561                                       (const char *) sr_req->recordSchema);
 562      }
 563
 564     // z3950'fy time to live - flagged as diagnostics above
 565     //if (sr_req->resultSetTTL)
 566
 567     // attaching Z3950 package to filter chain
 568     z3950_package.request() = apdu;
 569
 570     // sending Z30.50 present request
 571     z3950_package.move();
 572
 573     //check successful Z3950 present response
 574     Z_GDU *z3950_gdu = z3950_package.response().get();
 575     if (!z3950_gdu || z3950_gdu->which != Z_GDU_Z3950
 576         || z3950_gdu->u.z3950->which != Z_APDU_presentResponse
 577         || !z3950_gdu->u.z3950->u.presentResponse)
 578
 579     {
 580         yaz_add_srw_diagnostic(odr_en,
 581                                &(sru_pdu_res->u.response->diagnostics),
 582                                &(sru_pdu_res->u.response->num_diagnostics),
 583                                2, 0);
 584         package.session().close();
 585         return false;
 586     }
 587
 588
 589     // everything fine, continuing
 590
 591     Z_PresentResponse *pr = z3950_gdu->u.z3950->u.presentResponse;
 592     Z_SRW_searchRetrieveResponse *sru_res = sru_pdu_res->u.response;
 593
 594     // checking non surrogate dioagnostics in Z3950 present response package
 595     if (pr->records
 596         && pr->records->which == Z_Records_NSD
 597         && pr->records->u.nonSurrogateDiagnostic)
 598     {
 599         //int http_code =
 600         z3950_to_srw_diag(odr_en, sru_res,
 601                           pr->records->u.nonSurrogateDiagnostic);
 602         return false;
 603     }
 604
 605     // copy all records if existing
 606     if (pr->records && pr->records->which == Z_Records_DBOSD)
 607     {
 608         // srw'fy number of returned records
 609         sru_res->num_records
 610             = pr->records->u.databaseOrSurDiagnostics->num_records;
 611
 612         sru_res->records
 613             = (Z_SRW_record *) odr_malloc(odr_en,
 614                                           sru_res->num_records
 615                                              * sizeof(Z_SRW_record));
 616
 617
 618         // srw'fy nextRecordPosition
 619         // next position never zero or behind the last z3950 record
 620         if (pr->nextResultSetPosition
 621             && *(pr->nextResultSetPosition) > 0
 622             && *(pr->nextResultSetPosition)
 623                <= *(sru_pdu_res->u.response->numberOfRecords))
 624             sru_res->nextRecordPosition
 625                 = odr_intdup(odr_en, *(pr->nextResultSetPosition));
 626
 627         // inserting all records
 628         for (int i = 0; i < sru_res->num_records; i++)
 629         {
 630             Z_NamePlusRecord *npr
 631                 = pr->records->u.databaseOrSurDiagnostics->records[i];
 632
 633             sru_res->records[i].recordPosition
 634                 = odr_intdup(odr_en,
 635                              i + *(apdu->u.presentRequest->resultSetStartPoint));
 636
 637             sru_res->records[i].recordPacking = record_packing;
 638
 639             if (npr->which != Z_NamePlusRecord_databaseRecord)
 640             {
 641                 sru_res->records[i].recordSchema = "diagnostic";
 642                 sru_res->records[i].recordData_buf = "67";
 643                 sru_res->records[i].recordData_len = 2;
 644             }
 645             else
 646             {
 647                 Z_External *r = npr->u.databaseRecord;
 648                 oident *ent = oid_getentbyoid(r->direct_reference);
 649                 if (r->which == Z_External_octet
 650                     && ent->value == VAL_TEXT_XML)
 651                 {
 652                     sru_res->records[i].recordSchema = "dc";
 653                     sru_res->records[i].recordData_buf
 654                         = odr_strdupn(odr_en,
 655                                       (const char *)r->u.octet_aligned->buf,
 656                                       r->u.octet_aligned->len);
 657                     sru_res->records[i].recordData_len
 658                         = r->u.octet_aligned->len;
 659                 }
 660                 else
 661                 {
 662                     sru_res->records[i].recordSchema = "diagnostic";
 663                     sru_res->records[i].recordData_buf = "67";
 664                     sru_res->records[i].recordData_len = 2;
 665                 }
 666             }
 667         }
 668     }
 669
 670     return true;
 671 }
 672
 673 bool
 674 yf::SRUtoZ3950::Impl::z3950_scan_request(mp::Package &package,
 675                                         mp::odr &odr_en,
 676                                         Z_SRW_PDU *sru_pdu_res,
 677                                         Z_SRW_scanRequest const *sr_req) const
 678 {
 679     assert(sru_pdu_res->u.scan_response);
 680
 681     Package z3950_package(package.session(), package.origin());
 682     z3950_package.copy_filter(package);
 683     //mp::odr odr_en(ODR_ENCODE);
 684     Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_scanRequest);
 685
 686     //TODO: add stuff in apdu
 687     Z_ScanRequest *z_scanRequest = apdu->u.scanRequest;
 688
 689     // database repackaging
 690     z_scanRequest->num_databaseNames = 1;
 691     z_scanRequest->databaseNames = (char**)
 692         odr_malloc(odr_en, sizeof(char *));
 693     if (sr_req->database)
 694         z_scanRequest->databaseNames[0]
 695             = odr_strdup(odr_en, const_cast<char *>(sr_req->database));
 696     else
 697         z_scanRequest->databaseNames[0]
 698             = odr_strdup(odr_en, "Default");
 699
 700
 701     // query repackaging
 702     // CQL or XCQL scan is not possible in Z3950, flagging a diagnostic
 703     if (sr_req->query_type != Z_SRW_query_type_pqf)
 704     {
 705         //send_to_srw_client_error(7, "query");
 706         return false;
 707     }
 708
 709     // PQF query repackaging
 710     // need to use Z_AttributesPlusTerm structure, not Z_Query
 711     // this can be digget out of a
 712     // Z_query->type1(Z_RPNQuery)->RPNStructure(Z_RPNStructure)
 713     //   ->u.simple(Z_Operand)->u.attributesPlusTerm(Z_AttributesPlusTerm )
 714
 715     //Z_Query *z_query = (Z_Query *) odr_malloc(odr_en, sizeof(Z_Query));
 716     //z_searchRequest->query = z_query;
 717
 718     //if (!z3950_build_query(odr_en, z_query,
 719     //                       (const SRW_query&)sr_req->query,
 720     //                       sr_req->query_type))
 721     //{
 722         //send_to_srw_client_error(7, "query");
 723     //    return false;
 724     //}
 725
 726     // TODO:
 727
 728     z3950_package.request() = apdu;
 729     std::cout << "z3950_scan_request " << *apdu << "\n";
 730
 731     z3950_package.move();
 732     //TODO: check success condition
 733     return true;
 734     return false;
 735 }
 736
 737 bool yf::SRUtoZ3950::Impl::z3950_build_query(mp::odr &odr_en, Z_Query *z_query,
 738                                             const SRW_query &query,
 739                                             SRW_query_type query_type) const
 740 {
 741     if (query_type == Z_SRW_query_type_cql)
 742     {
 743         Z_External *ext = (Z_External *)
 744             odr_malloc(odr_en, sizeof(*ext));
 745         ext->direct_reference =
 746             odr_getoidbystr(odr_en, "1.2.840.10003.16.2");
 747         ext->indirect_reference = 0;
 748         ext->descriptor = 0;
 749         ext->which = Z_External_CQL;
 750         ext->u.cql = const_cast<char *>(query.cql);
 751
 752         z_query->which = Z_Query_type_104;
 753         z_query->u.type_104 =  ext;
 754         return true;
 755     }
 756
 757     if (query_type == Z_SRW_query_type_pqf)
 758     {
 759         Z_RPNQuery *RPNquery;
 760         YAZ_PQF_Parser pqf_parser;
 761
 762         pqf_parser = yaz_pqf_create ();
 763
 764         RPNquery = yaz_pqf_parse (pqf_parser, odr_en, query.pqf);
 765         if (!RPNquery)
 766         {
 767             std::cout << "TODO: Handeling of bad PQF\n";
 768             std::cout << "TODO: Diagnostic to be send\n";
 769         }
 770         z_query->which = Z_Query_type_1;
 771         z_query->u.type_1 =  RPNquery;
 772
 773         yaz_pqf_destroy(pqf_parser);
 774         return true;
 775     }
 776     return false;
 777 }
 778
 779
 780
 781 int
 782 yf::SRUtoZ3950::Impl::z3950_to_srw_diag(mp::odr &odr_en,
 783                                        Z_SRW_searchRetrieveResponse *sru_res,
 784                                        Z_DefaultDiagFormat *ddf) const
 785 {
 786     int bib1_code = *ddf->condition;
 787     if (bib1_code == 109)
 788         return 404;
 789     sru_res->num_diagnostics = 1;
 790     sru_res->diagnostics = (Z_SRW_diagnostic *)
 791         odr_malloc(odr_en, sizeof(*sru_res->diagnostics));
 792     yaz_mk_std_diagnostic(odr_en, sru_res->diagnostics,
 793                           yaz_diag_bib1_to_srw(*ddf->condition),
 794                           ddf->u.v2Addinfo);
 795     return 0;
 796 }
 797
 798
 799
 800 static mp::filter::Base* filter_creator()
 801 {
 802     return new mp::filter::SRUtoZ3950;
 803 }
 804
 805 extern "C" {
 806     struct metaproxy_1_filter_struct metaproxy_1_filter_sru_to_z3950 = {
 807         0,
 808         "sru_z3950",
 809         filter_creator
 810     };
 811 }
 812
 813
 814 /*
 815  * Local variables:
 816  * c-basic-offset: 4
 817  * indent-tabs-mode: nil
 818  * c-file-style: "stroustrup"
 819  * End:
 820  * vim: shiftwidth=4 tabstop=8 expandtab
 821  */