src/filter_sru_to_z3950.cpp

   1 /* $Id: filter_sru_to_z3950.cpp,v 1.11 2006-09-22 11:11:17 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 "filter_sru_to_z3950.hpp"
  13
  14 #include <yaz/zgdu.h>
  15 #include <yaz/z-core.h>
  16 #include <yaz/srw.h>
  17 #include <yaz/pquery.h>
  18
  19 #include <boost/thread/mutex.hpp>
  20
  21 #include <iostream>
  22 #include <sstream>
  23 #include <string>
  24
  25
  26 namespace mp = metaproxy_1;
  27 namespace yf = mp::filter;
  28
  29 namespace metaproxy_1
  30 {
  31
  32     template<typename T>
  33     std::string to_string(const T& t)
  34     {
  35         std::ostringstream o;
  36         if(o << t)
  37             return o.str();
  38
  39         return std::string();
  40     }
  41
  42     std::string http_header_value(const Z_HTTP_Header* header,
  43                                   const std::string name)
  44     {
  45         while (header && header->name
  46                && std::string(header->name) !=  name)
  47             header = header->next;
  48
  49         if (header && header->name && std::string(header->name) == name
  50             && header->value)
  51             return std::string(header->value);
  52
  53         return std::string();
  54     }
  55
  56
  57 }
  58
  59
  60 namespace metaproxy_1 {
  61     namespace filter {
  62         class SRUtoZ3950::Rep {
  63         private:
  64             union SRW_query {char * cql; char * xcql; char * pqf;};
  65             typedef const int& SRW_query_type;
  66         public:
  67             void configure(const xmlNode *xmlnode);
  68             void process(metaproxy_1::Package &package) const;
  69         private:
  70             std::string sru_protocol(const Z_HTTP_Request &http_req) const;
  71             std::string debug_http(const Z_HTTP_Request &http_req) const;
  72             void http_response(mp::Package &package,
  73                                const std::string &content,
  74                                int http_code = 200) const;
  75             bool build_sru_debug_package(mp::Package &package) const;
  76             bool build_sru_response(mp::Package &package,
  77                                     mp::odr &odr_en,
  78                                     Z_SOAP *soap,
  79                                     const Z_SRW_PDU *sru_pdu_res,
  80                                     char *charset,
  81                                     const char *stylesheet) const;
  82             Z_SRW_PDU * decode_sru_request(mp::Package &package,
  83                                            mp::odr &odr_de,
  84                                            mp::odr &odr_en,
  85                                            Z_SRW_PDU *sru_pdu_res,
  86                                            Z_SOAP *&soap,
  87                                            char *charset,
  88                                            char *stylesheet) const;
  89             bool z3950_build_query(mp::odr &odr_en, Z_Query *z_query,
  90                                    const SRW_query &query,
  91                                    SRW_query_type query_type) const;
  92             bool z3950_init_request(mp::Package &package,
  93                                          const std::string
  94                                          &database = "Default") const;
  95             bool z3950_close_request(mp::Package &package) const;
  96             bool z3950_search_request(mp::Package &package,
  97                                       mp::odr &odr_en,
  98                                       Z_SRW_PDU *sru_pdu_res,
  99                                       Z_SRW_searchRetrieveRequest
 100                                           const *sr_req) const;
 101             bool z3950_present_request(mp::Package &package,
 102                                        mp::odr &odr_en,
 103                                        Z_SRW_PDU *sru_pdu_res,
 104                                        Z_SRW_searchRetrieveRequest
 105                                        const *sr_req) const;
 106             bool z3950_scan_request(mp::Package &package,
 107                                     mp::odr &odr_en,
 108                                     Z_SRW_PDU *sru_pdu_res,
 109                                     Z_SRW_scanRequest
 110                                     const *sr_req) const;
 111             Z_ElementSetNames * build_esn_from_schema(mp::odr &odr_en, const char *schema) const;
 112         };
 113     }
 114 }
 115
 116 yf::SRUtoZ3950::SRUtoZ3950() : m_p(new Rep)
 117 {
 118 }
 119
 120 yf::SRUtoZ3950::~SRUtoZ3950()
 121 {  // must have a destructor because of boost::scoped_ptr
 122 }
 123
 124 void yf::SRUtoZ3950::configure(const xmlNode *xmlnode)
 125 {
 126     m_p->configure(xmlnode);
 127 }
 128
 129 void yf::SRUtoZ3950::process(mp::Package &package) const
 130 {
 131     m_p->process(package);
 132 }
 133
 134 void yf::SRUtoZ3950::Rep::configure(const xmlNode *xmlnode)
 135 {
 136 }
 137
 138 void yf::SRUtoZ3950::Rep::process(mp::Package &package) const
 139 {
 140     Z_GDU *zgdu_req = package.request().get();
 141
 142     // ignoring all non HTTP_Request packages
 143     if (!zgdu_req || !(zgdu_req->which == Z_GDU_HTTP_Request)){
 144         package.move();
 145         return;
 146     }
 147
 148     // only working on  HTTP_Request packages now
 149
 150
 151     // TODO: Z3950 response parsing and translation to SRU package
 152     bool ok = true;
 153
 154     mp::odr odr_de(ODR_DECODE);
 155     Z_SRW_PDU *sru_pdu_req = 0;
 156
 157     mp::odr odr_en(ODR_ENCODE);
 158     //Z_SRW_PDU *sru_pdu_res = 0;
 159     Z_SRW_PDU *sru_pdu_res = yaz_srw_get(odr_en, Z_SRW_explain_response);
 160
 161     Z_SOAP *soap = 0;
 162     char *charset = 0;
 163     char *stylesheet = 0;
 164
 165     if (! (sru_pdu_req = decode_sru_request(package, odr_de, odr_en,
 166                                             sru_pdu_res, soap,
 167                                             charset, stylesheet)))
 168     {
 169         build_sru_response(package, odr_en, soap,
 170                            sru_pdu_res, charset, stylesheet);
 171         return;
 172     }
 173
 174
 175     // SRU request package translation to Z3950 package
 176     if (sru_pdu_req)
 177         std::cout << *sru_pdu_req << "\n";
 178     else
 179         std::cout << "SRU empty\n";
 180
 181
 182     // explain
 183     if (sru_pdu_req && sru_pdu_req->which == Z_SRW_explain_request)
 184     {
 185         //Z_SRW_searchRetrieveRequest *sr_req = sru_pdu_req->u.request;
 186         // sru_pdu_res = yaz_srw_get(odr_en, Z_SRW_explain_response);
 187         std::cout << "TODO: implement explain response";
 188
 189     }
 190
 191
 192     // searchRetrieve
 193     if (sru_pdu_req && sru_pdu_req->which == Z_SRW_searchRetrieve_request)
 194     {
 195         Z_SRW_searchRetrieveRequest *sr_req = sru_pdu_req->u.request;
 196
 197         sru_pdu_res = yaz_srw_get(odr_en, Z_SRW_searchRetrieve_response);
 198
 199         if (z3950_init_request(package))
 200         {
 201             {
 202                 ok = z3950_search_request(package, odr_en,
 203                                           sru_pdu_res, sr_req);
 204
 205                 if (ok
 206                     && sru_pdu_res->u.response->numberOfRecords
 207                     && *(sru_pdu_res->u.response->numberOfRecords)
 208                     && sr_req->maximumRecords
 209                     && *(sr_req->maximumRecords))
 210
 211                     ok = z3950_present_request(package, odr_en,
 212                                                sru_pdu_res,
 213                                                sr_req);
 214                 z3950_close_request(package);
 215             }
 216         }
 217     }
 218
 219     // scan
 220     else if (sru_pdu_req && sru_pdu_req->which == Z_SRW_scan_request)
 221     {
 222         Z_SRW_scanRequest  *sr_req = sru_pdu_req->u.scan_request;
 223
 224         sru_pdu_res = yaz_srw_get(odr_en, Z_SRW_scan_response);
 225
 226         if (z3950_init_request(package))
 227         {
 228             z3950_scan_request(package, odr_en, sru_pdu_res, sr_req);
 229             z3950_close_request(package);
 230         }
 231     }
 232     else
 233     {
 234         std::cout << "SRU OPERATION NOT SUPPORTED \n";
 235         sru_pdu_res = yaz_srw_get(odr_en, Z_SRW_explain_response);
 236
 237         // TODO: make nice diagnostic return package
 238         package.session().close();
 239         return;
 240     }
 241
 242     //build_sru_debug_package(package);
 243     build_sru_response(package, odr_en, soap,
 244                        sru_pdu_res, charset, stylesheet);
 245     return;
 246
 247
 248
 249
 250
 251
 252
 253 }
 254
 255 bool yf::SRUtoZ3950::Rep::build_sru_debug_package(mp::Package &package) const
 256 {
 257     Z_GDU *zgdu_req = package.request().get();
 258     if  (zgdu_req && zgdu_req->which == Z_GDU_HTTP_Request)
 259     {
 260         Z_HTTP_Request* http_req =  zgdu_req->u.HTTP_Request;
 261         std::string content = debug_http(*http_req);
 262         int http_code = 400;
 263         http_response(package, content, http_code);
 264         return true;
 265     }
 266     package.session().close();
 267     return false;
 268 }
 269
 270
 271 bool yf::SRUtoZ3950::Rep::build_sru_response(mp::Package &package,
 272                                              mp::odr &odr_en,
 273                                              Z_SOAP *soap,
 274                                              const Z_SRW_PDU *sru_pdu_res,
 275                                              char *charset,
 276                                              const char *stylesheet)
 277     const
 278 {
 279
 280     // SRU request package translation to Z3950 package
 281     if (sru_pdu_res)
 282         std::cout << *(const_cast<Z_SRW_PDU *>(sru_pdu_res)) << "\n";
 283     else
 284         std::cout << "SRU empty\n";
 285
 286
 287     Z_GDU *zgdu_req = package.request().get();
 288     if  (zgdu_req && zgdu_req->which == Z_GDU_HTTP_Request)
 289     {
 290         Z_GDU *zgdu_res //= z_get_HTTP_Response(odr_en, 200);
 291             = odr_en.create_HTTP_Response(package.session(),
 292                                           zgdu_req->u.HTTP_Request,
 293                                           200);
 294
 295         // adding HTTP response code and headers
 296         Z_HTTP_Response * http_res = zgdu_res->u.HTTP_Response;
 297         //http_res->code = http_code;
 298
 299         std::string ctype("text/xml");
 300         if (charset){
 301             ctype += "; charset=";
 302             ctype += charset;
 303         }
 304
 305         z_HTTP_header_add(odr_en,
 306                           &http_res->headers, "Content-Type", ctype.c_str());
 307
 308          // packaging Z_SOAP into HTML response
 309          static Z_SOAP_Handler soap_handlers[4] = {
 310               {"http://www.loc.gov/zing/srw/", 0,
 311                (Z_SOAP_fun) yaz_srw_codec},
 312               {"http://www.loc.gov/zing/srw/v1.0/", 0,
 313                (Z_SOAP_fun) yaz_srw_codec},
 314               {"http://www.loc.gov/zing/srw/update/", 0,
 315                (Z_SOAP_fun) yaz_ucp_codec},
 316               {0, 0, 0}
 317           };
 318
 319
 320          // empty stylesheet means NO stylesheet
 321          if (stylesheet && *stylesheet == '\0')
 322              stylesheet = 0;
 323
 324          // encoding SRU package
 325
 326          soap->u.generic->p  = (void*) sru_pdu_res;
 327          //int ret =
 328          z_soap_codec_enc_xsl(odr_en, &soap,
 329                               &http_res->content_buf, &http_res->content_len,
 330                               soap_handlers, charset, stylesheet);
 331
 332
 333          package.response() = zgdu_res;
 334          return true;
 335     }
 336     package.session().close();
 337     return false;
 338 }
 339
 340
 341
 342  Z_SRW_PDU * yf::SRUtoZ3950::Rep::decode_sru_request(mp::Package &package,
 343                                                      mp::odr &odr_de,
 344                                                      mp::odr &odr_en,
 345                                                      Z_SRW_PDU *sru_pdu_res,
 346                                                      Z_SOAP *&soap,
 347                                                      char *charset,
 348                                                      char *stylesheet)
 349      const
 350 {
 351     Z_GDU *zgdu_req = package.request().get();
 352     Z_SRW_PDU *sru_pdu_req = 0;
 353
 354     assert((zgdu_req->which == Z_GDU_HTTP_Request));
 355
 356     //ignoring all non HTTP_Request packages
 357     //if (!zgdu_req || !(zgdu_req->which == Z_GDU_HTTP_Request)){
 358     //    return 0;
 359     //}
 360
 361     Z_HTTP_Request* http_req =  zgdu_req->u.HTTP_Request;
 362     if (! http_req)
 363         return 0;
 364
 365     //Z_SRW_PDU *sru_pdu_res_exp = yaz_srw_get(odr_en, Z_SRW_explain_response);
 366
 367     if (0 == yaz_sru_decode(http_req, &sru_pdu_req, &soap,
 368                             odr_de, &charset,
 369                             &(sru_pdu_res->u.response->diagnostics),
 370                             &(sru_pdu_res->u.response->num_diagnostics)))
 371     {
 372         if (sru_pdu_res->u.response->num_diagnostics)
 373         {
 374             //sru_pdu_res = sru_pdu_res_exp;
 375             package.session().close();
 376             return 0;
 377         }
 378         return sru_pdu_req;
 379     }
 380     else if (0 == yaz_srw_decode(http_req, &sru_pdu_req, &soap,
 381                                  odr_de, &charset))
 382         return sru_pdu_req;
 383     else
 384     {
 385         //sru_pdu_res = sru_pdu_res_exp;
 386         package.session().close();
 387         return 0;
 388     }
 389     return 0;
 390 }
 391
 392 bool
 393 yf::SRUtoZ3950::Rep::z3950_init_request(mp::Package &package,
 394                                              const std::string &database) const
 395 {
 396     // prepare Z3950 package
 397     //Session s;
 398     //Package z3950_package(s, package.origin());
 399     Package z3950_package(package.session(), package.origin());
 400     z3950_package.copy_filter(package);
 401
 402     // set initRequest APDU
 403     mp::odr odr_en(ODR_ENCODE);
 404     Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_initRequest);
 405     Z_InitRequest *init_req = apdu->u.initRequest;
 406     //TODO: add user name in apdu
 407     //TODO: add user passwd in apdu
 408     //init_req->idAuthentication = org_init->idAuthentication;
 409     //init_req->implementationId = "IDxyz";
 410     //init_req->implementationName = "NAMExyz";
 411     //init_req->implementationVersion = "VERSIONxyz";
 412
 413     ODR_MASK_SET(init_req->options, Z_Options_search);
 414     ODR_MASK_SET(init_req->options, Z_Options_present);
 415     ODR_MASK_SET(init_req->options, Z_Options_namedResultSets);
 416     ODR_MASK_SET(init_req->options, Z_Options_scan);
 417
 418     ODR_MASK_SET(init_req->protocolVersion, Z_ProtocolVersion_1);
 419     ODR_MASK_SET(init_req->protocolVersion, Z_ProtocolVersion_2);
 420     ODR_MASK_SET(init_req->protocolVersion, Z_ProtocolVersion_3);
 421
 422     z3950_package.request() = apdu;
 423
 424     // send Z3950 package
 425     // std::cout << "z3950_init_request " << *apdu <<"\n";
 426     z3950_package.move();
 427
 428     // dead Z3950 backend detection
 429     if (z3950_package.session().is_closed()){
 430         package.session().close();
 431         return false;
 432     }
 433
 434     // check successful initResponse
 435     Z_GDU *z3950_gdu = z3950_package.response().get();
 436
 437     if (z3950_gdu && z3950_gdu->which == Z_GDU_Z3950
 438         && z3950_gdu->u.z3950->which == Z_APDU_initResponse)
 439          return true;
 440
 441     return false;
 442 }
 443
 444 bool
 445 yf::SRUtoZ3950::Rep::z3950_close_request(mp::Package &package) const
 446 {
 447     // close SRU package
 448     package.session().close();
 449
 450     // prepare and close Z3950 package
 451     Package z3950_package(package.session(), package.origin());
 452     z3950_package.copy_filter(package);
 453     z3950_package.session().close();
 454
 455     // set close APDU
 456     //mp::odr odr_en(ODR_ENCODE);
 457     //Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_close);
 458     //z3950_package.request() = apdu;
 459
 460     z3950_package.move();
 461
 462     // check successful close response
 463     //Z_GDU *z3950_gdu = z3950_package.response().get();
 464     //if (z3950_gdu && z3950_gdu->which == Z_GDU_Z3950
 465     //    && z3950_gdu->u.z3950->which == Z_APDU_close)
 466     //    return true;
 467
 468     if (z3950_package.session().is_closed()){
 469         return true;
 470     }
 471     return false;
 472 }
 473
 474 bool
 475 yf::SRUtoZ3950::Rep::z3950_search_request(mp::Package &package,
 476                                           mp::odr &odr_en,
 477                                           Z_SRW_PDU *sru_pdu_res,
 478                                           Z_SRW_searchRetrieveRequest
 479                                           const *sr_req) const
 480 {
 481     Package z3950_package(package.session(), package.origin());
 482     z3950_package.copy_filter(package);
 483     //mp::odr odr_en(ODR_ENCODE);
 484     Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_searchRequest);
 485
 486     //add stuff in z3950 apdu
 487     Z_SearchRequest *z_searchRequest = apdu->u.searchRequest;
 488
 489     // z3950'fy database
 490     z_searchRequest->num_databaseNames = 1;
 491     z_searchRequest->databaseNames = (char**)
 492         odr_malloc(odr_en, sizeof(char *));
 493     if (sr_req->database)
 494         z_searchRequest->databaseNames[0]
 495             = odr_strdup(odr_en, const_cast<char *>(sr_req->database));
 496     else
 497         z_searchRequest->databaseNames[0]
 498             = odr_strdup(odr_en, "Default");
 499
 500
 501     // z3950'fy query
 502     Z_Query *z_query = (Z_Query *) odr_malloc(odr_en, sizeof(Z_Query));
 503     z_searchRequest->query = z_query;
 504
 505     if (!z3950_build_query(odr_en, z_query,
 506                            (const SRW_query&)sr_req->query,
 507                            sr_req->query_type))
 508     {
 509         //send_to_srw_client_error(7, "query");
 510         return false;
 511     }
 512
 513     z3950_package.request() = apdu;
 514     //std::cout << "z3950_search_request " << *apdu << "\n";
 515
 516     z3950_package.move();
 517
 518
 519     Z_GDU *z3950_gdu = z3950_package.response().get();
 520     //std::cout << "z3950_search_request " << *z3950_gdu << "\n";
 521
 522     //TODO: check success condition
 523
 524     //int yaz_diag_bib1_to_srw (int bib1_code);
 525     //int yaz_diag_srw_to_bib1(int srw_code);
 526     //Se kode i src/seshigh.c (srw_bend_search, srw_bend_init).
 527
 528     if (z3950_gdu && z3950_gdu->which == Z_GDU_Z3950
 529         && z3950_gdu->u.z3950->which == Z_APDU_searchResponse
 530         && z3950_gdu->u.z3950->u.searchResponse->searchStatus)
 531     {
 532
 533         Z_SearchResponse *sr = z3950_gdu->u.z3950->u.searchResponse;
 534         if (sr)
 535         {
 536             // srw'fy number of records
 537             sru_pdu_res->u.response->numberOfRecords
 538                 = (int *) odr_malloc(odr_en, sizeof(int *));
 539             *(sru_pdu_res->u.response->numberOfRecords) = *(sr->resultCount);
 540
 541             // srw'fy nextRecordPosition
 542             //sru_pdu_res->u.response->nextRecordPosition
 543             //    = (int *) odr_malloc(odr_en, sizeof(int *));
 544             //*(sru_pdu_res->u.response->nextRecordPosition) = 1;
 545
 546         }
 547
 548         return true;
 549     }
 550
 551     return false;
 552 }
 553
 554 bool
 555 yf::SRUtoZ3950::Rep::z3950_present_request(mp::Package &package,
 556                                            mp::odr &odr_en,
 557                                            Z_SRW_PDU *sru_pdu_res,
 558                                            Z_SRW_searchRetrieveRequest
 559                                            const *sr_req)
 560     const
 561 {
 562
 563     if (!sr_req)
 564         return false;
 565
 566
 567     // no need to work if nobody wants records seen ..
 568     if (!(sr_req->maximumRecords) || 0 == *(sr_req->maximumRecords))
 569         return true;
 570
 571     // creating Z3950 package
 572     Package z3950_package(package.session(), package.origin());
 573     z3950_package.copy_filter(package);
 574     Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_presentRequest);
 575
 576     assert(apdu->u.presentRequest);
 577
 578     bool send_z3950_present = true;
 579
 580     // recordXPath unsupported.
 581     if (sr_req->recordXPath)
 582     {
 583         send_z3950_present = false;
 584         yaz_add_srw_diagnostic(odr_en,
 585                                &(sru_pdu_res->u.response->diagnostics),
 586                                &(sru_pdu_res->u.response->num_diagnostics),
 587                                72, 0);
 588     }
 589
 590     // resultSetTTL unsupported.
 591     // resultSetIdleTime in response
 592     if (sr_req->resultSetTTL)
 593     {
 594         send_z3950_present = false;
 595         yaz_add_srw_diagnostic(odr_en,
 596                                &(sru_pdu_res->u.response->diagnostics),
 597                                &(sru_pdu_res->u.response->num_diagnostics),
 598                                50, 0);
 599     }
 600
 601     // sort unsupported
 602     if (sr_req->sort_type != Z_SRW_sort_type_none)
 603     {
 604         send_z3950_present = false;
 605         yaz_add_srw_diagnostic(odr_en,
 606                                &(sru_pdu_res->u.response->diagnostics),
 607                                &(sru_pdu_res->u.response->num_diagnostics),
 608                                80, 0);
 609     }
 610
 611     // exit on all these above diagnostics
 612     if (!send_z3950_present)
 613         return false;
 614
 615     // now packaging the z3950 present request
 616
 617     // z3950'fy start record position
 618     if (sr_req->startRecord)
 619         *(apdu->u.presentRequest->resultSetStartPoint)
 620             = *(sr_req->startRecord);
 621     else
 622         *(apdu->u.presentRequest->resultSetStartPoint) = 1;
 623
 624     // z3950'fy number of records requested
 625     if (sr_req->maximumRecords)
 626         *(apdu->u.presentRequest->numberOfRecordsRequested)
 627             = *(sr_req->maximumRecords);
 628
 629     // z3950'fy recordPacking
 630     int record_packing = Z_SRW_recordPacking_XML;
 631     if (sr_req->recordPacking && 's' == *(sr_req->recordPacking))
 632         record_packing = Z_SRW_recordPacking_string;
 633
 634     // RecordSyntax will always be XML
 635     (apdu->u.presentRequest->preferredRecordSyntax)
 636         = yaz_oidval_to_z3950oid (odr_en, CLASS_RECSYN, VAL_TEXT_XML);
 637
 638     // z3950'fy record schema
 639      if (sr_req->recordSchema)
 640      {
 641          apdu->u.presentRequest->recordComposition
 642              = (Z_RecordComposition *) odr_malloc(odr_en, sizeof(Z_RecordComposition));
 643          apdu->u.presentRequest->recordComposition->which
 644              = Z_RecordComp_simple;
 645          apdu->u.presentRequest->recordComposition->u.simple
 646              = build_esn_from_schema(odr_en, (const char *) sr_req->recordSchema);
 647      }
 648
 649     // z3950'fy time to live - flagged as diagnostics above
 650     //if (sr_req->resultSetTTL)
 651
 652     // attaching Z3950 package to filter chain
 653     z3950_package.request() = apdu;
 654
 655     //std::cout << "z3950_present_request " << *apdu << "\n";
 656     z3950_package.move();
 657
 658     //TODO: check success condition
 659     Z_GDU *z3950_gdu = z3950_package.response().get();
 660     if (z3950_gdu && z3950_gdu->which == Z_GDU_Z3950
 661         && z3950_gdu->u.z3950->which == Z_APDU_presentResponse)
 662
 663     {
 664         //std::cout << "z3950_present_request OK\n";
 665
 666         Z_PresentResponse *pr = z3950_gdu->u.z3950->u.presentResponse;
 667         if (pr)
 668         {
 669             Z_SRW_searchRetrieveResponse *sru_res = sru_pdu_res->u.response;
 670
 671             // srw'fy nextRecordPosition
 672             if (pr->nextResultSetPosition)
 673                 sru_res->nextRecordPosition
 674                     = odr_intdup(odr_en, *(pr->nextResultSetPosition));
 675
 676             //    = (int *) odr_malloc(odr_en, sizeof(int *));
 677             //*(sru_res->nextRecordPosition)
 678                                                      //= *(Pr->nextResultSetPosition);
 679
 680             // copy all records if existing
 681             if (pr->records && pr->records->which == Z_Records_DBOSD)
 682             {
 683                 // srw'fy number of returned records
 684                 sru_res->num_records
 685                     = pr->records->u.databaseOrSurDiagnostics->num_records;
 686
 687                 sru_res->records
 688                     = (Z_SRW_record *)
 689                     odr_malloc(odr_en,
 690                                sru_res->num_records *sizeof(Z_SRW_record));
 691
 692                 for (int i = 0; i < sru_res->num_records; i++)
 693                 {
 694                     Z_NamePlusRecord *npr
 695                         = pr->records->u.databaseOrSurDiagnostics->records[i];
 696
 697                     sru_res->records[i].recordPosition
 698                         = odr_intdup(odr_en, i + *(apdu->u.presentRequest->resultSetStartPoint));
 699
 700                     sru_res->records[i].recordPacking = record_packing;
 701
 702                     if (npr->which != Z_NamePlusRecord_databaseRecord)
 703                     {
 704                         sru_res->records[i].recordSchema = "diagnostic";
 705                         sru_res->records[i].recordData_buf = "67";
 706                         sru_res->records[i].recordData_len = 2;
 707                     }
 708                     else
 709                     {
 710                         Z_External *r = npr->u.databaseRecord;
 711                         oident *ent = oid_getentbyoid(r->direct_reference);
 712                         if (r->which == Z_External_octet
 713                             && ent->value == VAL_TEXT_XML)
 714                         {
 715                             sru_res->records[i].recordSchema = "dc";
 716                             sru_res->records[i].recordData_buf
 717                                 = odr_strdupn(odr_en,
 718                                               (const char *)r->u.octet_aligned->buf,
 719                                               r->u.octet_aligned->len);
 720                             sru_res->records[i].recordData_len
 721                                 = r->u.octet_aligned->len;
 722                         }
 723                         else
 724                         {
 725                             sru_res->records[i].recordSchema = "diagnostic";
 726                             sru_res->records[i].recordData_buf = "67";
 727                             sru_res->records[i].recordData_len = 2;
 728                         }
 729                     }
 730
 731                 }
 732
 733
 734             }
 735         }
 736         return true;
 737     }
 738
 739     return false;
 740 }
 741
 742 bool
 743 yf::SRUtoZ3950::Rep::z3950_scan_request(mp::Package &package,
 744                                         mp::odr &odr_en,
 745                                         Z_SRW_PDU *sru_pdu_res,
 746                                         Z_SRW_scanRequest const *sr_req) const
 747 {
 748     Package z3950_package(package.session(), package.origin());
 749     z3950_package.copy_filter(package);
 750     //mp::odr odr_en(ODR_ENCODE);
 751     Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_scanRequest);
 752
 753     //TODO: add stuff in apdu
 754     Z_ScanRequest *z_scanRequest = apdu->u.scanRequest;
 755
 756     // database repackaging
 757     z_scanRequest->num_databaseNames = 1;
 758     z_scanRequest->databaseNames = (char**)
 759         odr_malloc(odr_en, sizeof(char *));
 760     if (sr_req->database)
 761         z_scanRequest->databaseNames[0]
 762             = odr_strdup(odr_en, const_cast<char *>(sr_req->database));
 763     else
 764         z_scanRequest->databaseNames[0]
 765             = odr_strdup(odr_en, "Default");
 766
 767
 768     // query repackaging
 769     // CQL or XCQL scan is not possible in Z3950, flagging a diagnostic
 770     if (sr_req->query_type != Z_SRW_query_type_pqf)
 771     {
 772         //send_to_srw_client_error(7, "query");
 773         return false;
 774     }
 775
 776     // PQF query repackaging
 777     // need to use Z_AttributesPlusTerm structure, not Z_Query
 778     // this can be digget out of a
 779     // Z_query->type1(Z_RPNQuery)->RPNStructure(Z_RPNStructure)
 780     //   ->u.simple(Z_Operand)->u.attributesPlusTerm(Z_AttributesPlusTerm )
 781
 782     //Z_Query *z_query = (Z_Query *) odr_malloc(odr_en, sizeof(Z_Query));
 783     //z_searchRequest->query = z_query;
 784
 785     //if (!z3950_build_query(odr_en, z_query,
 786     //                       (const SRW_query&)sr_req->query,
 787     //                       sr_req->query_type))
 788     //{
 789         //send_to_srw_client_error(7, "query");
 790     //    return false;
 791     //}
 792
 793     // TODO:
 794
 795     z3950_package.request() = apdu;
 796     std::cout << "z3950_scan_request " << *apdu << "\n";
 797
 798     z3950_package.move();
 799     //TODO: check success condition
 800     return true;
 801     return false;
 802 }
 803
 804 bool yf::SRUtoZ3950::Rep::z3950_build_query(mp::odr &odr_en, Z_Query *z_query,
 805                                             const SRW_query &query,
 806                                             SRW_query_type query_type) const
 807 {
 808     if (query_type == Z_SRW_query_type_cql)
 809     {
 810         Z_External *ext = (Z_External *)
 811             odr_malloc(odr_en, sizeof(*ext));
 812         ext->direct_reference =
 813             odr_getoidbystr(odr_en, "1.2.840.10003.16.2");
 814         ext->indirect_reference = 0;
 815         ext->descriptor = 0;
 816         ext->which = Z_External_CQL;
 817         ext->u.cql = const_cast<char *>(query.cql);
 818
 819         z_query->which = Z_Query_type_104;
 820         z_query->u.type_104 =  ext;
 821         return true;
 822     }
 823
 824     if (query_type == Z_SRW_query_type_pqf)
 825     {
 826         Z_RPNQuery *RPNquery;
 827         YAZ_PQF_Parser pqf_parser;
 828
 829         pqf_parser = yaz_pqf_create ();
 830
 831         RPNquery = yaz_pqf_parse (pqf_parser, odr_en, query.pqf);
 832         if (!RPNquery)
 833         {
 834             std::cout << "TODO: Handeling of bad PQF\n";
 835             std::cout << "TODO: Diagnostic to be send\n";
 836         }
 837         z_query->which = Z_Query_type_1;
 838         z_query->u.type_1 =  RPNquery;
 839
 840         yaz_pqf_destroy(pqf_parser);
 841         return true;
 842     }
 843     return false;
 844 }
 845
 846
 847 std::string
 848 yf::SRUtoZ3950::Rep::sru_protocol(const Z_HTTP_Request &http_req) const
 849 {
 850     const std::string mime_urlencoded("application/x-www-form-urlencoded");
 851     const std::string mime_text_xml("text/xml");
 852     const std::string mime_soap_xml("application/soap+xml");
 853
 854     const std::string http_method(http_req.method);
 855     const std::string http_type
 856         =  http_header_value(http_req.headers, "Content-Type");
 857
 858     if (http_method == "GET")
 859         return "SRU GET";
 860
 861     if (http_method == "POST"
 862               && http_type  == mime_urlencoded)
 863         return "SRU POST";
 864
 865     if ( http_method == "POST"
 866          && (http_type  == mime_text_xml
 867              || http_type  == mime_soap_xml))
 868         return "SRU SOAP";
 869
 870     return "HTTP";
 871 }
 872
 873 std::string
 874 yf::SRUtoZ3950::Rep::debug_http(const Z_HTTP_Request &http_req) const
 875 {
 876     std::string message("<html>\n<body>\n<h1>"
 877                         "Metaproxy SRUtoZ3950 filter"
 878                         "</h1>\n");
 879
 880     message += "<h3>HTTP Info</h3><br/>\n";
 881     message += "<p>\n";
 882     message += "<b>Method: </b> " + std::string(http_req.method) + "<br/>\n";
 883     message += "<b>Version:</b> " + std::string(http_req.version) + "<br/>\n";
 884     message += "<b>Path:   </b> " + std::string(http_req.path) + "<br/>\n";
 885
 886     message += "<b>Content-Type:</b>"
 887         + http_header_value(http_req.headers, "Content-Type")
 888         + "<br/>\n";
 889     message += "<b>Content-Length:</b>"
 890         + http_header_value(http_req.headers, "Content-Length")
 891         + "<br/>\n";
 892     message += "</p>\n";
 893
 894     message += "<h3>Headers</h3><br/>\n";
 895     message += "<p>\n";
 896     Z_HTTP_Header* header = http_req.headers;
 897     while (header){
 898         message += "<b>Header: </b> <i>"
 899             + std::string(header->name) + ":</i> "
 900             + std::string(header->value) + "<br/>\n";
 901         header = header->next;
 902     }
 903     message += "</p>\n";
 904     message += "</body>\n</html>\n";
 905     return message;
 906 }
 907
 908 void yf::SRUtoZ3950::Rep::http_response(metaproxy_1::Package &package,
 909                                         const std::string &content,
 910                                         int http_code) const
 911 {
 912
 913     Z_GDU *zgdu_req = package.request().get();
 914     Z_GDU *zgdu_res = 0;
 915     mp::odr odr;
 916     zgdu_res
 917        = odr.create_HTTP_Response(package.session(),
 918                                   zgdu_req->u.HTTP_Request,
 919                                   http_code);
 920
 921     zgdu_res->u.HTTP_Response->content_len = content.size();
 922     zgdu_res->u.HTTP_Response->content_buf
 923         = (char*) odr_malloc(odr, zgdu_res->u.HTTP_Response->content_len);
 924
 925     strncpy(zgdu_res->u.HTTP_Response->content_buf,
 926             content.c_str(),  zgdu_res->u.HTTP_Response->content_len);
 927
 928     //z_HTTP_header_add(odr, &hres->headers,
 929     //                  "Content-Type", content_type.c_str());
 930     package.response() = zgdu_res;
 931 }
 932
 933
 934 Z_ElementSetNames * yf::SRUtoZ3950::Rep::build_esn_from_schema(mp::odr &odr_en, const char *schema) const
 935 {
 936   if (!schema)
 937         return 0;
 938
 939     Z_ElementSetNames *esn
 940         = (Z_ElementSetNames *) odr_malloc(odr_en, sizeof(Z_ElementSetNames));
 941     esn->which = Z_ElementSetNames_generic;
 942     esn->u.generic = odr_strdup(odr_en, schema);
 943     return esn;
 944 }
 945
 946 static mp::filter::Base* filter_creator()
 947 {
 948     return new mp::filter::SRUtoZ3950;
 949 }
 950
 951 extern "C" {
 952     struct metaproxy_1_filter_struct metaproxy_1_filter_sru_to_z3950 = {
 953         0,
 954         "SRUtoZ3950",
 955         filter_creator
 956     };
 957 }
 958
 959
 960 /*
 961  * Local variables:
 962  * c-basic-offset: 4
 963  * indent-tabs-mode: nil
 964  * c-file-style: "stroustrup"
 965  * End:
 966  * vim: shiftwidth=4 tabstop=8 expandtab
 967  */