src/filter_sru_to_z3950.cpp

   1 /* $Id: filter_sru_to_z3950.cpp,v 1.10 2006-09-21 11:43:41 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             //friend class SRUtoZ3950;
  64         private:
  65             union SRW_query {char * cql; char * xcql; char * pqf;};
  66             typedef const int& SRW_query_type;
  67         public:
  68             void configure(const xmlNode *xmlnode);
  69             void process(metaproxy_1::Package &package) const;
  70         private:
  71             std::string sru_protocol(const Z_HTTP_Request &http_req) const;
  72             std::string debug_http(const Z_HTTP_Request &http_req) const;
  73             void http_response(mp::Package &package,
  74                                const std::string &content,
  75                                int http_code = 200) const;
  76             bool build_sru_debug_package(mp::Package &package) const;
  77             bool build_sru_response(mp::Package &package,
  78                                     mp::odr &odr_en,
  79                                     Z_SOAP *soap,
  80                                     const Z_SRW_PDU *sru_pdu_res,
  81                                     char *charset,
  82                                     const char *stylesheet) const;
  83             Z_SRW_PDU * decode_sru_request(mp::Package &package,
  84                                            mp::odr &odr_de,
  85                                            mp::odr &odr_en,
  86                                            Z_SRW_PDU *&sru_pdu_res,
  87                                            Z_SOAP *&soap,
  88                                            char *charset,
  89                                            const char *stylesheet) const;
  90             bool z3950_build_query(mp::odr &odr_en, Z_Query *z_query,
  91                                    const SRW_query &query,
  92                                    SRW_query_type query_type) const;
  93             bool z3950_init_request(mp::Package &package,
  94                                          const std::string
  95                                          &database = "Default") const;
  96             bool z3950_close_request(mp::Package &package) const;
  97             bool z3950_search_request(mp::Package &package,
  98                                       mp::odr &odr_en,
  99                                       Z_SRW_PDU *sru_pdu_res,
 100                                       Z_SRW_searchRetrieveRequest
 101                                           const *sr_req) const;
 102                                       //const std::string &database,
 103                                       //const std::string &query,
 104                                       //int query_type) const;
 105             bool z3950_present_request(mp::Package &package,
 106                                        mp::odr &odr_en,
 107                                        Z_SRW_PDU *sru_pdu_res,
 108                                        Z_SRW_searchRetrieveRequest
 109                                        const *sr_req) const;
 110             //unsigned int start_position,
 111             //unsigned int records_requested) const;
 112             bool z3950_scan_request(mp::Package &package,
 113                                     mp::odr &odr_en,
 114                                     Z_SRW_PDU *sru_pdu_res,
 115                                     Z_SRW_scanRequest
 116                                     const *sr_req) const;
 117             //const std::string &database,
 118             //const std::string &query,
 119             //int query_type) const;
 120         };
 121     }
 122 }
 123
 124 yf::SRUtoZ3950::SRUtoZ3950() : m_p(new Rep)
 125 {
 126 }
 127
 128 yf::SRUtoZ3950::~SRUtoZ3950()
 129 {  // must have a destructor because of boost::scoped_ptr
 130 }
 131
 132 void yf::SRUtoZ3950::configure(const xmlNode *xmlnode)
 133 {
 134     m_p->configure(xmlnode);
 135 }
 136
 137 void yf::SRUtoZ3950::process(mp::Package &package) const
 138 {
 139     m_p->process(package);
 140 }
 141
 142 void yf::SRUtoZ3950::Rep::configure(const xmlNode *xmlnode)
 143 {
 144 }
 145
 146 void yf::SRUtoZ3950::Rep::process(mp::Package &package) const
 147 {
 148     Z_GDU *zgdu_req = package.request().get();
 149
 150     // ignoring all non HTTP_Request packages
 151     if (!zgdu_req || !(zgdu_req->which == Z_GDU_HTTP_Request)){
 152         package.move();
 153         return;
 154     }
 155
 156     // only working on  HTTP_Request packages now
 157
 158
 159     // TODO: Z3950 response parsing and translation to SRU package
 160     bool ok = true;
 161
 162     Z_SRW_PDU *sru_pdu_req = 0;
 163     mp::odr odr_de(ODR_DECODE);
 164
 165     Z_SRW_PDU *sru_pdu_res = 0;
 166     mp::odr odr_en(ODR_ENCODE);
 167
 168     Z_SOAP *soap = 0;
 169     char *charset = 0;
 170     const char *stylesheet = 0;
 171
 172     if (! (sru_pdu_req = decode_sru_request(package, odr_de, odr_en,
 173                                             sru_pdu_res, soap,
 174                                             charset, stylesheet)))
 175     {
 176         //build_sru_debug_package(package);
 177         build_sru_response(package, odr_en, soap,
 178                            sru_pdu_res, charset, stylesheet);
 179         return;
 180     }
 181
 182
 183     // SRU request package translation to Z3950 package
 184     if (sru_pdu_req)
 185         std::cout << *sru_pdu_req << "\n";
 186     else
 187         std::cout << "SRU empty\n";
 188
 189
 190     // explain
 191     if (sru_pdu_req && sru_pdu_req->which == Z_SRW_explain_request)
 192     {
 193         //Z_SRW_searchRetrieveRequest *sr_req = sru_pdu_req->u.request;
 194         sru_pdu_res = yaz_srw_get(odr_en, Z_SRW_explain_response);
 195         std::cout << "TODO: implement explain response";
 196
 197     }
 198
 199
 200     // searchRetrieve
 201     if (sru_pdu_req && sru_pdu_req->which == Z_SRW_searchRetrieve_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         if (z3950_init_request(package))
 208         {
 209             {
 210                 ok = z3950_search_request(package, odr_en,
 211                                           sru_pdu_res, sr_req);
 212
 213                 if (ok
 214                     && sru_pdu_res->u.response->numberOfRecords
 215                     && *(sru_pdu_res->u.response->numberOfRecords)
 216                     && sr_req->maximumRecords
 217                     && *(sr_req->maximumRecords))
 218
 219                     ok = z3950_present_request(package, odr_en,
 220                                                sru_pdu_res,
 221                                                sr_req);
 222                 z3950_close_request(package);
 223             }
 224         }
 225     }
 226
 227     // scan
 228     else if (sru_pdu_req && sru_pdu_req->which == Z_SRW_scan_request)
 229     {
 230         Z_SRW_scanRequest  *sr_req = sru_pdu_req->u.scan_request;
 231
 232         sru_pdu_res = yaz_srw_get(odr_en, Z_SRW_scan_response);
 233
 234         if (z3950_init_request(package))
 235         {
 236             z3950_scan_request(package, odr_en, sru_pdu_res, sr_req);
 237             z3950_close_request(package);
 238         }
 239     }
 240     else
 241     {
 242         std::cout << "SRU OPERATION NOT SUPPORTED \n";
 243         sru_pdu_res = yaz_srw_get(odr_en, Z_SRW_explain_response);
 244
 245         // TODO: make nice diagnostic return package
 246         package.session().close();
 247         return;
 248     }
 249
 250     //build_sru_debug_package(package);
 251     build_sru_response(package, odr_en, soap,
 252                        sru_pdu_res, charset, stylesheet);
 253     return;
 254
 255
 256
 257
 258
 259
 260
 261 }
 262
 263 bool yf::SRUtoZ3950::Rep::build_sru_debug_package(mp::Package &package) const
 264 {
 265     Z_GDU *zgdu_req = package.request().get();
 266     if  (zgdu_req && zgdu_req->which == Z_GDU_HTTP_Request)
 267     {
 268         Z_HTTP_Request* http_req =  zgdu_req->u.HTTP_Request;
 269         std::string content = debug_http(*http_req);
 270         int http_code = 400;
 271         http_response(package, content, http_code);
 272         return true;
 273     }
 274     package.session().close();
 275     return false;
 276 }
 277
 278
 279 bool yf::SRUtoZ3950::Rep::build_sru_response(mp::Package &package,
 280                                              mp::odr &odr_en,
 281                                              Z_SOAP *soap,
 282                                              const Z_SRW_PDU *sru_pdu_res,
 283                                              char *charset,
 284                                              const char *stylesheet)
 285     const
 286 {
 287
 288     // SRU request package translation to Z3950 package
 289     if (sru_pdu_res)
 290         std::cout << *(const_cast<Z_SRW_PDU *>(sru_pdu_res)) << "\n";
 291     else
 292         std::cout << "SRU empty\n";
 293
 294
 295     Z_GDU *zgdu_req = package.request().get();
 296     if  (zgdu_req && zgdu_req->which == Z_GDU_HTTP_Request)
 297     {
 298         Z_GDU *zgdu_res //= z_get_HTTP_Response(odr_en, 200);
 299             = odr_en.create_HTTP_Response(package.session(),
 300                                           zgdu_req->u.HTTP_Request,
 301                                           200);
 302
 303         // adding HTTP response code and headers
 304         Z_HTTP_Response * http_res = zgdu_res->u.HTTP_Response;
 305         //http_res->code = http_code;
 306
 307         std::string ctype("text/xml");
 308         if (charset){
 309             ctype += "; charset=";
 310             ctype += charset;
 311         }
 312
 313         z_HTTP_header_add(odr_en,
 314                           &http_res->headers, "Content-Type", ctype.c_str());
 315
 316          // packaging Z_SOAP into HTML response
 317          static Z_SOAP_Handler soap_handlers[4] = {
 318               {"http://www.loc.gov/zing/srw/", 0,
 319                (Z_SOAP_fun) yaz_srw_codec},
 320               {"http://www.loc.gov/zing/srw/v1.0/", 0,
 321                (Z_SOAP_fun) yaz_srw_codec},
 322               {"http://www.loc.gov/zing/srw/update/", 0,
 323                (Z_SOAP_fun) yaz_ucp_codec},
 324               {0, 0, 0}
 325           };
 326
 327
 328          // empty stylesheet means NO stylesheet
 329          if (stylesheet && *stylesheet == '\0')
 330              stylesheet = 0;
 331
 332          // encoding SRU package
 333
 334          soap->u.generic->p  = (void*) sru_pdu_res;
 335          //int ret =
 336          z_soap_codec_enc_xsl(odr_en, &soap,
 337                               &http_res->content_buf, &http_res->content_len,
 338                               soap_handlers, charset, stylesheet);
 339
 340
 341          package.response() = zgdu_res;
 342          return true;
 343     }
 344     package.session().close();
 345     return false;
 346 }
 347
 348
 349
 350  Z_SRW_PDU * yf::SRUtoZ3950::Rep::decode_sru_request(mp::Package &package,
 351                                                      mp::odr &odr_de,
 352                                                      mp::odr &odr_en,
 353                                                      Z_SRW_PDU *&sru_pdu_res,
 354                                                      Z_SOAP *&soap,
 355                                                      char *charset,
 356                                                      const char *stylesheet)
 357      const
 358 {
 359     Z_GDU *zgdu_req = package.request().get();
 360     Z_SRW_PDU *sru_pdu_req = 0;
 361
 362     assert((zgdu_req->which == Z_GDU_HTTP_Request));
 363
 364     //ignoring all non HTTP_Request packages
 365     //if (!zgdu_req || !(zgdu_req->which == Z_GDU_HTTP_Request)){
 366     //    return 0;
 367     //}
 368
 369     Z_HTTP_Request* http_req =  zgdu_req->u.HTTP_Request;
 370     if (! http_req)
 371         return 0;
 372
 373     Z_SRW_PDU *sru_pdu_res_exp = yaz_srw_get(odr_en, Z_SRW_explain_response);
 374
 375     if (0 == yaz_sru_decode(http_req, &sru_pdu_req, &soap,
 376                             odr_de, &charset,
 377                             &(sru_pdu_res_exp->u.response->diagnostics),
 378                             &(sru_pdu_res_exp->u.response->num_diagnostics)))
 379     {
 380         if (sru_pdu_res_exp->u.response->num_diagnostics)
 381         {
 382             sru_pdu_res = sru_pdu_res_exp;
 383             package.session().close();
 384             return 0;
 385         }
 386         return sru_pdu_req;
 387     }
 388     else if (0 == yaz_srw_decode(http_req, &sru_pdu_req, &soap,
 389                                  odr_de, &charset))
 390         return sru_pdu_req;
 391     else
 392     {
 393         sru_pdu_res = sru_pdu_res_exp;
 394         package.session().close();
 395         return 0;
 396     }
 397     return 0;
 398 }
 399
 400 bool
 401 yf::SRUtoZ3950::Rep::z3950_init_request(mp::Package &package,
 402                                              const std::string &database) const
 403 {
 404     // prepare Z3950 package
 405     //Session s;
 406     //Package z3950_package(s, package.origin());
 407     Package z3950_package(package.session(), package.origin());
 408     z3950_package.copy_filter(package);
 409
 410     // set initRequest APDU
 411     mp::odr odr_en(ODR_ENCODE);
 412     Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_initRequest);
 413     Z_InitRequest *init_req = apdu->u.initRequest;
 414     //TODO: add user name in apdu
 415     //TODO: add user passwd in apdu
 416     //init_req->idAuthentication = org_init->idAuthentication;
 417     //init_req->implementationId = "IDxyz";
 418     //init_req->implementationName = "NAMExyz";
 419     //init_req->implementationVersion = "VERSIONxyz";
 420
 421     ODR_MASK_SET(init_req->options, Z_Options_search);
 422     ODR_MASK_SET(init_req->options, Z_Options_present);
 423     ODR_MASK_SET(init_req->options, Z_Options_namedResultSets);
 424     ODR_MASK_SET(init_req->options, Z_Options_scan);
 425
 426     ODR_MASK_SET(init_req->protocolVersion, Z_ProtocolVersion_1);
 427     ODR_MASK_SET(init_req->protocolVersion, Z_ProtocolVersion_2);
 428     ODR_MASK_SET(init_req->protocolVersion, Z_ProtocolVersion_3);
 429
 430     z3950_package.request() = apdu;
 431
 432     // send Z3950 package
 433     // std::cout << "z3950_init_request " << *apdu <<"\n";
 434     z3950_package.move();
 435
 436     // dead Z3950 backend detection
 437     if (z3950_package.session().is_closed()){
 438         package.session().close();
 439         return false;
 440     }
 441
 442     // check successful initResponse
 443     Z_GDU *z3950_gdu = z3950_package.response().get();
 444
 445     if (z3950_gdu && z3950_gdu->which == Z_GDU_Z3950
 446         && z3950_gdu->u.z3950->which == Z_APDU_initResponse)
 447          return true;
 448
 449     return false;
 450 }
 451
 452 bool
 453 yf::SRUtoZ3950::Rep::z3950_close_request(mp::Package &package) const
 454 {
 455     // prepare Z3950 package
 456     Package z3950_package(package.session(), package.origin());
 457     z3950_package.copy_filter(package);
 458     z3950_package.session().close();
 459
 460     // set close APDU
 461     //mp::odr odr_en(ODR_ENCODE);
 462     //Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_close);
 463     //z3950_package.request() = apdu;
 464
 465     z3950_package.move();
 466
 467     // check successful close response
 468     //Z_GDU *z3950_gdu = z3950_package.response().get();
 469     //if (z3950_gdu && z3950_gdu->which == Z_GDU_Z3950
 470     //    && z3950_gdu->u.z3950->which == Z_APDU_close)
 471     //    return true;
 472
 473     if (z3950_package.session().is_closed()){
 474         //package.session().close();
 475         return true;
 476     }
 477     return false;
 478 }
 479
 480 bool
 481 yf::SRUtoZ3950::Rep::z3950_search_request(mp::Package &package,
 482                                           mp::odr &odr_en,
 483                                           Z_SRW_PDU *sru_pdu_res,
 484                                           Z_SRW_searchRetrieveRequest
 485                                           const *sr_req) const
 486 {
 487     Package z3950_package(package.session(), package.origin());
 488     z3950_package.copy_filter(package);
 489     //mp::odr odr_en(ODR_ENCODE);
 490     Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_searchRequest);
 491
 492     //add stuff in z3950 apdu
 493     Z_SearchRequest *z_searchRequest = apdu->u.searchRequest;
 494
 495     // z3950'fy database
 496     z_searchRequest->num_databaseNames = 1;
 497     z_searchRequest->databaseNames = (char**)
 498         odr_malloc(odr_en, sizeof(char *));
 499     if (sr_req->database)
 500         z_searchRequest->databaseNames[0]
 501             = odr_strdup(odr_en, const_cast<char *>(sr_req->database));
 502     else
 503         z_searchRequest->databaseNames[0]
 504             = odr_strdup(odr_en, "Default");
 505
 506
 507     // z3950'fy query
 508     Z_Query *z_query = (Z_Query *) odr_malloc(odr_en, sizeof(Z_Query));
 509     z_searchRequest->query = z_query;
 510
 511     if (!z3950_build_query(odr_en, z_query,
 512                            (const SRW_query&)sr_req->query,
 513                            sr_req->query_type))
 514     {
 515         //send_to_srw_client_error(7, "query");
 516         return false;
 517     }
 518
 519     z3950_package.request() = apdu;
 520     //std::cout << "z3950_search_request " << *apdu << "\n";
 521
 522     z3950_package.move();
 523
 524     //TODO: check success condition
 525
 526     //int yaz_diag_bib1_to_srw (int bib1_code);
 527     //int yaz_diag_srw_to_bib1(int srw_code);
 528     //Se kode i src/seshigh.c (srw_bend_search, srw_bend_init).
 529
 530     Z_GDU *z3950_gdu = z3950_package.response().get();
 531     //std::cout << "z3950_search_request " << *z3950_gdu << "\n";
 532
 533     if (z3950_gdu && z3950_gdu->which == Z_GDU_Z3950
 534         && z3950_gdu->u.z3950->which == Z_APDU_searchResponse
 535         && z3950_gdu->u.z3950->u.searchResponse->searchStatus)
 536     {
 537
 538         Z_SearchResponse *sr = z3950_gdu->u.z3950->u.searchResponse;
 539         if (sr)
 540         {
 541             // srw'fy number of records
 542             sru_pdu_res->u.response->numberOfRecords
 543                 = (int *) odr_malloc(odr_en, sizeof(int *));
 544             *(sru_pdu_res->u.response->numberOfRecords) = *(sr->resultCount);
 545
 546             // srw'fy nextRecordPosition
 547             //sru_pdu_res->u.response->nextRecordPosition
 548             //    = (int *) odr_malloc(odr_en, sizeof(int *));
 549             //*(sru_pdu_res->u.response->nextRecordPosition) = 1;
 550
 551         }
 552
 553         return true;
 554     }
 555
 556     return false;
 557 }
 558
 559 bool
 560 yf::SRUtoZ3950::Rep::z3950_present_request(mp::Package &package,
 561                                            mp::odr &odr_en,
 562                                            Z_SRW_PDU *sru_pdu_res,
 563                                            Z_SRW_searchRetrieveRequest
 564                                            const *sr_req)
 565     const
 566 {
 567
 568     if (!sr_req)
 569         return false;
 570
 571
 572     // no need to work if nobody wants records seen ..
 573     if (!(sr_req->maximumRecords) || 0 == *(sr_req->maximumRecords))
 574         return true;
 575
 576     // creating Z3950 package
 577     Package z3950_package(package.session(), package.origin());
 578     z3950_package.copy_filter(package);
 579     //mp::odr odr_en(ODR_ENCODE);
 580     Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_presentRequest);
 581
 582     //TODO: add stuff in apdu
 583     assert(apdu->u.presentRequest);
 584
 585     bool send_z3950_present = true;
 586
 587     // recordXPath unsupported.
 588     if (sr_req->recordXPath)
 589     {
 590         send_z3950_present = false;
 591         yaz_add_srw_diagnostic(odr_en,
 592                                &(sru_pdu_res->u.response->diagnostics),
 593                                &(sru_pdu_res->u.response->num_diagnostics),
 594                                72, 0);
 595     }
 596
 597     // resultSetTTL unsupported.
 598     // resultSetIdleTime in response
 599     if (sr_req->resultSetTTL)
 600     {
 601         send_z3950_present = false;
 602         yaz_add_srw_diagnostic(odr_en,
 603                                &(sru_pdu_res->u.response->diagnostics),
 604                                &(sru_pdu_res->u.response->num_diagnostics),
 605                                50, 0);
 606     }
 607
 608     // sort unsupported
 609     if (sr_req->sort_type != Z_SRW_sort_type_none)
 610     {
 611         send_z3950_present = false;
 612         yaz_add_srw_diagnostic(odr_en,
 613                                &(sru_pdu_res->u.response->diagnostics),
 614                                &(sru_pdu_res->u.response->num_diagnostics),
 615                                80, 0);
 616     }
 617
 618     // exit on all these above diagnostics
 619     if (!send_z3950_present)
 620         return false;
 621
 622
 623     // z3950'fy start record position
 624     if (sr_req->startRecord)
 625         *(apdu->u.presentRequest->resultSetStartPoint)
 626             = *(sr_req->startRecord);
 627     else
 628         *(apdu->u.presentRequest->resultSetStartPoint) = 1;
 629
 630     // z3950'fy number of records requested
 631     if (sr_req->maximumRecords)
 632         *(apdu->u.presentRequest->numberOfRecordsRequested)
 633             = *(sr_req->maximumRecords);
 634
 635     // TODO: recordPacking
 636
 637     // TODO: z3950'fy record schema
 638     //if (sr_req->recordSchema)
 639     //    *(apdu->u.presentRequest->preferredRecordSyntax)
 640     //        = *(sr_req->recordSchema);
 641
 642     // TODO: z3950'fy time to live
 643     //if (sr_req->resultSetTTL)
 644
 645
 646
 647
 648     z3950_package.request() = apdu;
 649
 650     //std::cout << "z3950_present_request " << *apdu << "\n";
 651     z3950_package.move();
 652
 653     //TODO: check success condition
 654     Z_GDU *z3950_gdu = z3950_package.response().get();
 655     if (z3950_gdu && z3950_gdu->which == Z_GDU_Z3950
 656         && z3950_gdu->u.z3950->which == Z_APDU_presentResponse)
 657
 658     {
 659         //std::cout << "z3950_present_request OK\n";
 660
 661         Z_PresentResponse *pr = z3950_gdu->u.z3950->u.presentResponse;
 662         if (pr)
 663         {
 664
 665             // srw'fy number of returned records
 666             //sru_pdu_res->u.response->num_records
 667             //    = *(pr->numberOfRecordsReturned);
 668             //= (int *) odr_malloc(odr_en, sizeof(int *));
 669             //*(sru_pdu_res->u.response->num_records)
 670             //    = *(pr->numberOfRecordsReturned);
 671
 672             // srw'fy nextRecordPosition
 673             //if (! sru_pdu_res->u.response->nextRecordPosition)
 674             sru_pdu_res->u.response->nextRecordPosition
 675                 = (int *) odr_malloc(odr_en, sizeof(int *));
 676             *(sru_pdu_res->u.response->nextRecordPosition)
 677                 = *(pr->nextResultSetPosition);
 678         }
 679         return true;
 680     }
 681
 682     return false;
 683 }
 684
 685 bool
 686 yf::SRUtoZ3950::Rep::z3950_scan_request(mp::Package &package,
 687                                         mp::odr &odr_en,
 688                                         Z_SRW_PDU *sru_pdu_res,
 689                                         Z_SRW_scanRequest const *sr_req) const
 690 {
 691     Package z3950_package(package.session(), package.origin());
 692     z3950_package.copy_filter(package);
 693     //mp::odr odr_en(ODR_ENCODE);
 694     Z_APDU *apdu = zget_APDU(odr_en, Z_APDU_scanRequest);
 695
 696     //TODO: add stuff in apdu
 697     Z_ScanRequest *z_scanRequest = apdu->u.scanRequest;
 698
 699     // database repackaging
 700     z_scanRequest->num_databaseNames = 1;
 701     z_scanRequest->databaseNames = (char**)
 702         odr_malloc(odr_en, sizeof(char *));
 703     if (sr_req->database)
 704         z_scanRequest->databaseNames[0]
 705             = odr_strdup(odr_en, const_cast<char *>(sr_req->database));
 706     else
 707         z_scanRequest->databaseNames[0]
 708             = odr_strdup(odr_en, "Default");
 709
 710
 711     // query repackaging
 712     // CQL or XCQL scan is not possible in Z3950, flagging a diagnostic
 713     if (sr_req->query_type != Z_SRW_query_type_pqf)
 714     {
 715         //send_to_srw_client_error(7, "query");
 716         return false;
 717     }
 718
 719     // PQF query repackaging
 720     // need to use Z_AttributesPlusTerm structure, not Z_Query
 721     // this can be digget out of a
 722     // Z_query->type1(Z_RPNQuery)->RPNStructure(Z_RPNStructure)
 723     //   ->u.simple(Z_Operand)->u.attributesPlusTerm(Z_AttributesPlusTerm )
 724
 725     //Z_Query *z_query = (Z_Query *) odr_malloc(odr_en, sizeof(Z_Query));
 726     //z_searchRequest->query = z_query;
 727
 728     //if (!z3950_build_query(odr_en, z_query,
 729     //                       (const SRW_query&)sr_req->query,
 730     //                       sr_req->query_type))
 731     //{
 732         //send_to_srw_client_error(7, "query");
 733     //    return false;
 734     //}
 735
 736     // TODO:
 737
 738     z3950_package.request() = apdu;
 739     std::cout << "z3950_scan_request " << *apdu << "\n";
 740
 741     z3950_package.move();
 742     //TODO: check success condition
 743     return true;
 744     return false;
 745 }
 746
 747 bool yf::SRUtoZ3950::Rep::z3950_build_query(mp::odr &odr_en, Z_Query *z_query,
 748                                             const SRW_query &query,
 749                                             SRW_query_type query_type) const
 750 {
 751     if (query_type == Z_SRW_query_type_cql)
 752     {
 753         Z_External *ext = (Z_External *)
 754             odr_malloc(odr_en, sizeof(*ext));
 755         ext->direct_reference =
 756             odr_getoidbystr(odr_en, "1.2.840.10003.16.2");
 757         ext->indirect_reference = 0;
 758         ext->descriptor = 0;
 759         ext->which = Z_External_CQL;
 760         ext->u.cql = const_cast<char *>(query.cql);
 761
 762         z_query->which = Z_Query_type_104;
 763         z_query->u.type_104 =  ext;
 764         return true;
 765     }
 766
 767     if (query_type == Z_SRW_query_type_pqf)
 768     {
 769         Z_RPNQuery *RPNquery;
 770         YAZ_PQF_Parser pqf_parser;
 771
 772         pqf_parser = yaz_pqf_create ();
 773
 774         RPNquery = yaz_pqf_parse (pqf_parser, odr_en, query.pqf);
 775         if (!RPNquery)
 776         {
 777             std::cout << "TODO: Handeling of bad PQF\n";
 778             std::cout << "TODO: Diagnostic to be send\n";
 779         }
 780         z_query->which = Z_Query_type_1;
 781         z_query->u.type_1 =  RPNquery;
 782
 783         yaz_pqf_destroy(pqf_parser);
 784         return true;
 785     }
 786     return false;
 787 }
 788
 789
 790 std::string
 791 yf::SRUtoZ3950::Rep::sru_protocol(const Z_HTTP_Request &http_req) const
 792 {
 793     const std::string mime_urlencoded("application/x-www-form-urlencoded");
 794     const std::string mime_text_xml("text/xml");
 795     const std::string mime_soap_xml("application/soap+xml");
 796
 797     const std::string http_method(http_req.method);
 798     const std::string http_type
 799         =  http_header_value(http_req.headers, "Content-Type");
 800
 801     if (http_method == "GET")
 802         return "SRU GET";
 803
 804     if (http_method == "POST"
 805               && http_type  == mime_urlencoded)
 806         return "SRU POST";
 807
 808     if ( http_method == "POST"
 809          && (http_type  == mime_text_xml
 810              || http_type  == mime_soap_xml))
 811         return "SRU SOAP";
 812
 813     return "HTTP";
 814 }
 815
 816 std::string
 817 yf::SRUtoZ3950::Rep::debug_http(const Z_HTTP_Request &http_req) const
 818 {
 819     std::string message("<html>\n<body>\n<h1>"
 820                         "Metaproxy SRUtoZ3950 filter"
 821                         "</h1>\n");
 822
 823     message += "<h3>HTTP Info</h3><br/>\n";
 824     message += "<p>\n";
 825     message += "<b>Method: </b> " + std::string(http_req.method) + "<br/>\n";
 826     message += "<b>Version:</b> " + std::string(http_req.version) + "<br/>\n";
 827     message += "<b>Path:   </b> " + std::string(http_req.path) + "<br/>\n";
 828
 829     message += "<b>Content-Type:</b>"
 830         + http_header_value(http_req.headers, "Content-Type")
 831         + "<br/>\n";
 832     message += "<b>Content-Length:</b>"
 833         + http_header_value(http_req.headers, "Content-Length")
 834         + "<br/>\n";
 835     message += "</p>\n";
 836
 837     message += "<h3>Headers</h3><br/>\n";
 838     message += "<p>\n";
 839     Z_HTTP_Header* header = http_req.headers;
 840     while (header){
 841         message += "<b>Header: </b> <i>"
 842             + std::string(header->name) + ":</i> "
 843             + std::string(header->value) + "<br/>\n";
 844         header = header->next;
 845     }
 846     message += "</p>\n";
 847     message += "</body>\n</html>\n";
 848     return message;
 849 }
 850
 851 void yf::SRUtoZ3950::Rep::http_response(metaproxy_1::Package &package,
 852                                         const std::string &content,
 853                                         int http_code) const
 854 {
 855
 856     Z_GDU *zgdu_req = package.request().get();
 857     Z_GDU *zgdu_res = 0;
 858     mp::odr odr;
 859     zgdu_res
 860        = odr.create_HTTP_Response(package.session(),
 861                                   zgdu_req->u.HTTP_Request,
 862                                   http_code);
 863
 864     zgdu_res->u.HTTP_Response->content_len = content.size();
 865     zgdu_res->u.HTTP_Response->content_buf
 866         = (char*) odr_malloc(odr, zgdu_res->u.HTTP_Response->content_len);
 867
 868     strncpy(zgdu_res->u.HTTP_Response->content_buf,
 869             content.c_str(),  zgdu_res->u.HTTP_Response->content_len);
 870
 871     //z_HTTP_header_add(odr, &hres->headers,
 872     //                  "Content-Type", content_type.c_str());
 873     package.response() = zgdu_res;
 874 }
 875
 876
 877
 878
 879 static mp::filter::Base* filter_creator()
 880 {
 881     return new mp::filter::SRUtoZ3950;
 882 }
 883
 884 extern "C" {
 885     struct metaproxy_1_filter_struct metaproxy_1_filter_sru_to_z3950 = {
 886         0,
 887         "SRUtoZ3950",
 888         filter_creator
 889     };
 890 }
 891
 892
 893 /*
 894  * Local variables:
 895  * c-basic-offset: 4
 896  * indent-tabs-mode: nil
 897  * c-file-style: "stroustrup"
 898  * End:
 899  * vim: shiftwidth=4 tabstop=8 expandtab
 900  */