src/filter_zoom.cpp

   1 /* This file is part of Metaproxy.
   2    Copyright (C) 2005-2011 Index Data
   3
   4 Metaproxy is free software; you can redistribute it and/or modify it under
   5 the terms of the GNU General Public License as published by the Free
   6 Software Foundation; either version 2, or (at your option) any later
   7 version.
   8
   9 Metaproxy is distributed in the hope that it will be useful, but WITHOUT ANY
  10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17 */
  18
  19 #include "config.hpp"
  20
  21 #include <stdlib.h>
  22 #include <sys/types.h>
  23 #include "filter_zoom.hpp"
  24 #include <yaz/zoom.h>
  25 #include <yaz/yaz-version.h>
  26 #include <yaz/tpath.h>
  27 #include <yaz/srw.h>
  28 #include <metaproxy/package.hpp>
  29 #include <metaproxy/util.hpp>
  30 #include <metaproxy/xmlutil.hpp>
  31 #include "torus.hpp"
  32
  33 #include <libxslt/xsltutils.h>
  34 #include <libxslt/transform.h>
  35
  36 #include <boost/thread/mutex.hpp>
  37 #include <boost/thread/condition.hpp>
  38 #include <yaz/ccl_xml.h>
  39 #include <yaz/ccl.h>
  40 #include <yaz/rpn2cql.h>
  41 #include <yaz/rpn2solr.h>
  42 #include <yaz/pquery.h>
  43 #include <yaz/cql.h>
  44 #include <yaz/oid_db.h>
  45 #include <yaz/diagbib1.h>
  46 #include <yaz/log.h>
  47 #include <yaz/zgdu.h>
  48 #include <yaz/querytowrbuf.h>
  49 #include <yaz/sortspec.h>
  50 #include <yaz/tokenizer.h>
  51
  52 namespace mp = metaproxy_1;
  53 namespace yf = mp::filter;
  54
  55 namespace metaproxy_1 {
  56     namespace filter {
  57         class Zoom::Searchable : boost::noncopyable {
  58           public:
  59             std::string authentication;
  60             std::string cfAuth;
  61             std::string cfProxy;
  62             std::string cfSubDb;
  63             std::string udb;
  64             std::string target;
  65             std::string query_encoding;
  66             std::string sru;
  67             std::string request_syntax;
  68             std::string element_set;
  69             std::string record_encoding;
  70             std::string transform_xsl_fname;
  71             std::string transform_xsl_content;
  72             std::string urlRecipe;
  73             std::string contentConnector;
  74             std::string sortStrategy;
  75             bool use_turbomarc;
  76             bool piggyback;
  77             CCL_bibset ccl_bibset;
  78             std::map<std::string, std::string> sortmap;
  79             Searchable(CCL_bibset base);
  80             ~Searchable();
  81         };
  82         class Zoom::Backend : boost::noncopyable {
  83             friend class Impl;
  84             friend class Frontend;
  85             std::string zurl;
  86             ZOOM_connection m_connection;
  87             ZOOM_resultset m_resultset;
  88             std::string m_frontend_database;
  89             SearchablePtr sptr;
  90             xsltStylesheetPtr xsp;
  91             std::string content_session_id;
  92         public:
  93             Backend(SearchablePtr sptr);
  94             ~Backend();
  95             void connect(std::string zurl, int *error, char **addinfo,
  96                          ODR odr);
  97             void search(ZOOM_query q, Odr_int *hits,
  98                         int *error, char **addinfo, ODR odr);
  99             void present(Odr_int start, Odr_int number, ZOOM_record *recs,
 100                          int *error, char **addinfo, ODR odr);
 101             void set_option(const char *name, const char *value);
 102             void set_option(const char *name, std::string value);
 103             const char *get_option(const char *name);
 104             void get_zoom_error(int *error, char **addinfo, ODR odr);
 105         };
 106         class Zoom::Frontend : boost::noncopyable {
 107             friend class Impl;
 108             Impl *m_p;
 109             bool m_is_virtual;
 110             bool m_in_use;
 111             yazpp_1::GDU m_init_gdu;
 112             BackendPtr m_backend;
 113             void handle_package(mp::Package &package);
 114             void handle_search(mp::Package &package);
 115             void handle_present(mp::Package &package);
 116             BackendPtr get_backend_from_databases(std::string &database,
 117                                                   int *error,
 118                                                   char **addinfo,
 119                                                   ODR odr);
 120
 121
 122             void prepare_elements(BackendPtr b,
 123                                   Odr_oid *preferredRecordSyntax,
 124                                   const char *element_set_name,
 125                                   bool &enable_pz2_retrieval,
 126                                   bool &enable_pz2_transform,
 127                                   bool &assume_marc8_charset);
 128
 129             Z_Records *get_records(Odr_int start,
 130                                    Odr_int number_to_present,
 131                                    int *error,
 132                                    char **addinfo,
 133                                    Odr_int *number_of_records_returned,
 134                                    ODR odr, BackendPtr b,
 135                                    Odr_oid *preferredRecordSyntax,
 136                                    const char *element_set_name);
 137         public:
 138             Frontend(Impl *impl);
 139             ~Frontend();
 140         };
 141         class Zoom::Impl {
 142             friend class Frontend;
 143         public:
 144             Impl();
 145             ~Impl();
 146             void process(metaproxy_1::Package & package);
 147             void configure(const xmlNode * ptr, bool test_only,
 148                            const char *path);
 149         private:
 150             void configure_local_records(const xmlNode * ptr, bool test_only);
 151             FrontendPtr get_frontend(mp::Package &package);
 152             void release_frontend(mp::Package &package);
 153             SearchablePtr parse_torus_record(const xmlNode *ptr);
 154             struct cql_node *convert_cql_fields(struct cql_node *cn, ODR odr);
 155             std::map<mp::Session, FrontendPtr> m_clients;
 156             boost::mutex m_mutex;
 157             boost::condition m_cond_session_ready;
 158             std::string torus_url;
 159             std::map<std::string,std::string> fieldmap;
 160             std::string xsldir;
 161             std::string file_path;
 162             std::string content_proxy_server;
 163             std::string content_tmp_file;
 164             bool apdu_log;
 165             CCL_bibset bibset;
 166             std::string element_transform;
 167             std::string element_raw;
 168             std::string proxy;
 169             std::map<std::string,SearchablePtr> s_map;
 170         };
 171     }
 172 }
 173
 174 // define Pimpl wrapper forwarding to Impl
 175
 176 yf::Zoom::Zoom() : m_p(new Impl)
 177 {
 178 }
 179
 180 yf::Zoom::~Zoom()
 181 {  // must have a destructor because of boost::scoped_ptr
 182 }
 183
 184 void yf::Zoom::configure(const xmlNode *xmlnode, bool test_only,
 185                          const char *path)
 186 {
 187     m_p->configure(xmlnode, test_only, path);
 188 }
 189
 190 void yf::Zoom::process(mp::Package &package) const
 191 {
 192     m_p->process(package);
 193 }
 194
 195
 196 // define Implementation stuff
 197
 198 yf::Zoom::Backend::Backend(SearchablePtr ptr) : sptr(ptr)
 199 {
 200     m_connection = ZOOM_connection_create(0);
 201     m_resultset = 0;
 202     xsp = 0;
 203 }
 204
 205 yf::Zoom::Backend::~Backend()
 206 {
 207     if (xsp)
 208         xsltFreeStylesheet(xsp);
 209     ZOOM_connection_destroy(m_connection);
 210     ZOOM_resultset_destroy(m_resultset);
 211 }
 212
 213
 214 void yf::Zoom::Backend::get_zoom_error(int *error, char **addinfo,
 215                                        ODR odr)
 216 {
 217     const char *msg = 0;
 218     const char *zoom_addinfo = 0;
 219     const char *dset = 0;
 220     *error = ZOOM_connection_error_x(m_connection, &msg, &zoom_addinfo, &dset);
 221     if (*error)
 222     {
 223         if (*error >= ZOOM_ERROR_CONNECT)
 224         {
 225             // turn ZOOM diagnostic into a Bib-1 2: with addinfo=zoom err msg
 226             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 227             *addinfo = (char *) odr_malloc(
 228                 odr, 20 + strlen(msg) +
 229                 (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 230             strcpy(*addinfo, msg);
 231             if (zoom_addinfo)
 232             {
 233                 strcat(*addinfo, ": ");
 234                 strcat(*addinfo, zoom_addinfo);
 235                 strcat(*addinfo, " ");
 236             }
 237         }
 238         else
 239         {
 240             if (dset && !strcmp(dset, "info:srw/diagnostic/1"))
 241                 *error = yaz_diag_srw_to_bib1(*error);
 242             *addinfo = (char *) odr_malloc(
 243                 odr, 20 + (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 244             **addinfo = '\0';
 245             if (zoom_addinfo && *zoom_addinfo)
 246             {
 247                 strcpy(*addinfo, zoom_addinfo);
 248                 strcat(*addinfo, " ");
 249             }
 250             strcat(*addinfo, "(backend)");
 251         }
 252     }
 253 }
 254
 255 void yf::Zoom::Backend::connect(std::string zurl,
 256                                 int *error, char **addinfo,
 257                                 ODR odr)
 258 {
 259     ZOOM_connection_connect(m_connection, zurl.c_str(), 0);
 260     get_zoom_error(error, addinfo, odr);
 261 }
 262
 263 void yf::Zoom::Backend::search(ZOOM_query q, Odr_int *hits,
 264                                int *error, char **addinfo, ODR odr)
 265 {
 266     m_resultset = ZOOM_connection_search(m_connection, q);
 267     get_zoom_error(error, addinfo, odr);
 268     if (*error == 0)
 269         *hits = ZOOM_resultset_size(m_resultset);
 270     else
 271         *hits = 0;
 272 }
 273
 274 void yf::Zoom::Backend::present(Odr_int start, Odr_int number,
 275                                 ZOOM_record *recs,
 276                                 int *error, char **addinfo, ODR odr)
 277 {
 278     ZOOM_resultset_records(m_resultset, recs, start, number);
 279     get_zoom_error(error, addinfo, odr);
 280 }
 281
 282 void yf::Zoom::Backend::set_option(const char *name, const char *value)
 283 {
 284     ZOOM_connection_option_set(m_connection, name, value);
 285     if (m_resultset)
 286         ZOOM_resultset_option_set(m_resultset, name, value);
 287 }
 288
 289 void yf::Zoom::Backend::set_option(const char *name, std::string value)
 290 {
 291     set_option(name, value.c_str());
 292 }
 293
 294 const char *yf::Zoom::Backend::get_option(const char *name)
 295 {
 296     return ZOOM_connection_option_get(m_connection, name);
 297 }
 298
 299 yf::Zoom::Searchable::Searchable(CCL_bibset base)
 300 {
 301     piggyback = true;
 302     use_turbomarc = true;
 303     sortStrategy = "embed";
 304     ccl_bibset = ccl_qual_dup(base);
 305 }
 306
 307 yf::Zoom::Searchable::~Searchable()
 308 {
 309     ccl_qual_rm(&ccl_bibset);
 310 }
 311
 312 yf::Zoom::Frontend::Frontend(Impl *impl) :
 313     m_p(impl), m_is_virtual(false), m_in_use(true)
 314 {
 315 }
 316
 317 yf::Zoom::Frontend::~Frontend()
 318 {
 319 }
 320
 321 yf::Zoom::FrontendPtr yf::Zoom::Impl::get_frontend(mp::Package &package)
 322 {
 323     boost::mutex::scoped_lock lock(m_mutex);
 324
 325     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 326
 327     while(true)
 328     {
 329         it = m_clients.find(package.session());
 330         if (it == m_clients.end())
 331             break;
 332
 333         if (!it->second->m_in_use)
 334         {
 335             it->second->m_in_use = true;
 336             return it->second;
 337         }
 338         m_cond_session_ready.wait(lock);
 339     }
 340     FrontendPtr f(new Frontend(this));
 341     m_clients[package.session()] = f;
 342     f->m_in_use = true;
 343     return f;
 344 }
 345
 346 void yf::Zoom::Impl::release_frontend(mp::Package &package)
 347 {
 348     boost::mutex::scoped_lock lock(m_mutex);
 349     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 350
 351     it = m_clients.find(package.session());
 352     if (it != m_clients.end())
 353     {
 354         if (package.session().is_closed())
 355         {
 356             m_clients.erase(it);
 357         }
 358         else
 359         {
 360             it->second->m_in_use = false;
 361         }
 362         m_cond_session_ready.notify_all();
 363     }
 364 }
 365
 366 yf::Zoom::Impl::Impl() :
 367     apdu_log(false), element_transform("pz2") , element_raw("raw")
 368 {
 369     bibset = ccl_qual_mk();
 370
 371     srand((unsigned int) time(0));
 372 }
 373
 374 yf::Zoom::Impl::~Impl()
 375 {
 376     ccl_qual_rm(&bibset);
 377 }
 378
 379 yf::Zoom::SearchablePtr yf::Zoom::Impl::parse_torus_record(const xmlNode *ptr)
 380 {
 381     Zoom::SearchablePtr s(new Searchable(bibset));
 382
 383     for (ptr = ptr->children; ptr; ptr = ptr->next)
 384     {
 385         if (ptr->type != XML_ELEMENT_NODE)
 386             continue;
 387         if (!strcmp((const char *) ptr->name, "layer"))
 388             ptr = ptr->children;
 389         else if (!strcmp((const char *) ptr->name,
 390                          "authentication"))
 391         {
 392             s->authentication = mp::xml::get_text(ptr);
 393         }
 394         else if (!strcmp((const char *) ptr->name,
 395                          "cfAuth"))
 396         {
 397             s->cfAuth = mp::xml::get_text(ptr);
 398         }
 399         else if (!strcmp((const char *) ptr->name,
 400                          "cfProxy"))
 401         {
 402             s->cfProxy = mp::xml::get_text(ptr);
 403         }
 404         else if (!strcmp((const char *) ptr->name,
 405                          "cfSubDb"))
 406         {
 407             s->cfSubDb = mp::xml::get_text(ptr);
 408         }
 409         else if (!strcmp((const char *) ptr->name,
 410                          "contentConnector"))
 411         {
 412             s->contentConnector = mp::xml::get_text(ptr);
 413         }
 414         else if (!strcmp((const char *) ptr->name, "udb"))
 415         {
 416             s->udb = mp::xml::get_text(ptr);
 417         }
 418         else if (!strcmp((const char *) ptr->name, "zurl"))
 419         {
 420             s->target = mp::xml::get_text(ptr);
 421         }
 422         else if (!strcmp((const char *) ptr->name, "sru"))
 423         {
 424             s->sru = mp::xml::get_text(ptr);
 425         }
 426         else if (!strcmp((const char *) ptr->name,
 427                          "queryEncoding"))
 428         {
 429             s->query_encoding = mp::xml::get_text(ptr);
 430         }
 431         else if (!strcmp((const char *) ptr->name,
 432                          "piggyback"))
 433         {
 434             s->piggyback = mp::xml::get_bool(ptr, true);
 435         }
 436         else if (!strcmp((const char *) ptr->name,
 437                          "requestSyntax"))
 438         {
 439             s->request_syntax = mp::xml::get_text(ptr);
 440         }
 441         else if (!strcmp((const char *) ptr->name,
 442                          "elementSet"))
 443         {
 444             s->element_set = mp::xml::get_text(ptr);
 445         }
 446         else if (!strcmp((const char *) ptr->name,
 447                          "recordEncoding"))
 448         {
 449             s->record_encoding = mp::xml::get_text(ptr);
 450         }
 451         else if (!strcmp((const char *) ptr->name,
 452                          "transform"))
 453         {
 454             s->transform_xsl_fname = mp::xml::get_text(ptr);
 455         }
 456         else if (!strcmp((const char *) ptr->name,
 457                          "literalTransform"))
 458         {
 459             s->transform_xsl_content = mp::xml::get_text(ptr);
 460         }
 461         else if (!strcmp((const char *) ptr->name,
 462                          "urlRecipe"))
 463         {
 464             s->urlRecipe = mp::xml::get_text(ptr);
 465         }
 466         else if (!strcmp((const char *) ptr->name,
 467                          "useTurboMarc"))
 468         {
 469             ; // useTurboMarc is ignored
 470         }
 471         else if (!strncmp((const char *) ptr->name,
 472                           "cclmap_", 7))
 473         {
 474             std::string value = mp::xml::get_text(ptr);
 475             ccl_qual_fitem(s->ccl_bibset, value.c_str(),
 476                            (const char *) ptr->name + 7);
 477         }
 478         else if (!strncmp((const char *) ptr->name,
 479                           "sortmap_", 8))
 480         {
 481             std::string value = mp::xml::get_text(ptr);
 482             s->sortmap[(const char *) ptr->name + 8] = value;
 483         }
 484         else if (!strcmp((const char *) ptr->name,
 485                           "sortStrategy"))
 486         {
 487             s->sortStrategy = mp::xml::get_text(ptr);
 488         }
 489     }
 490     return s;
 491 }
 492
 493 void yf::Zoom::Impl::configure_local_records(const xmlNode *ptr, bool test_only)
 494 {
 495     while (ptr && ptr->type != XML_ELEMENT_NODE)
 496         ptr = ptr->next;
 497
 498     if (ptr)
 499     {
 500         if (!strcmp((const char *) ptr->name, "records"))
 501         {
 502             for (ptr = ptr->children; ptr; ptr = ptr->next)
 503             {
 504                 if (ptr->type != XML_ELEMENT_NODE)
 505                     continue;
 506                 if (!strcmp((const char *) ptr->name, "record"))
 507                 {
 508                     SearchablePtr s = parse_torus_record(ptr);
 509                     if (s)
 510                     {
 511                         std::string udb = s->udb;
 512                         if (udb.length())
 513                             s_map[s->udb] = s;
 514                         else
 515                         {
 516                             throw mp::filter::FilterException
 517                                 ("No udb for local torus record");
 518                         }
 519                     }
 520                 }
 521                 else
 522                 {
 523                     throw mp::filter::FilterException
 524                         ("Bad element "
 525                          + std::string((const char *) ptr->name)
 526                          + " in zoom filter inside element "
 527                          "<torus><records>");
 528                 }
 529             }
 530         }
 531         else
 532         {
 533             throw mp::filter::FilterException
 534                 ("Bad element "
 535                  + std::string((const char *) ptr->name)
 536                  + " in zoom filter inside element <torus>");
 537         }
 538     }
 539 }
 540
 541 void yf::Zoom::Impl::configure(const xmlNode *ptr, bool test_only,
 542                                const char *path)
 543 {
 544     content_tmp_file = "/tmp/cf.XXXXXX.p";
 545     if (path && *path)
 546     {
 547         file_path = path;
 548     }
 549     for (ptr = ptr->children; ptr; ptr = ptr->next)
 550     {
 551         if (ptr->type != XML_ELEMENT_NODE)
 552             continue;
 553         else if (!strcmp((const char *) ptr->name, "torus"))
 554         {
 555             const struct _xmlAttr *attr;
 556             for (attr = ptr->properties; attr; attr = attr->next)
 557             {
 558                 if (!strcmp((const char *) attr->name, "url"))
 559                     torus_url = mp::xml::get_text(attr->children);
 560                 else if (!strcmp((const char *) attr->name, "xsldir"))
 561                     xsldir = mp::xml::get_text(attr->children);
 562                 else if (!strcmp((const char *) attr->name, "element_transform"))
 563                     element_transform = mp::xml::get_text(attr->children);
 564                 else if (!strcmp((const char *) attr->name, "element_raw"))
 565                     element_raw = mp::xml::get_text(attr->children);
 566                 else if (!strcmp((const char *) attr->name, "proxy"))
 567                     proxy = mp::xml::get_text(attr->children);
 568                 else
 569                     throw mp::filter::FilterException(
 570                         "Bad attribute " + std::string((const char *)
 571                                                        attr->name));
 572             }
 573             configure_local_records(ptr->children, test_only);
 574         }
 575         else if (!strcmp((const char *) ptr->name, "cclmap"))
 576         {
 577             const char *addinfo = 0;
 578             ccl_xml_config(bibset, ptr, &addinfo);
 579         }
 580         else if (!strcmp((const char *) ptr->name, "fieldmap"))
 581         {
 582             const struct _xmlAttr *attr;
 583             std::string ccl_field;
 584             std::string cql_field;
 585             for (attr = ptr->properties; attr; attr = attr->next)
 586             {
 587                 if (!strcmp((const char *) attr->name, "ccl"))
 588                     ccl_field = mp::xml::get_text(attr->children);
 589                 else if (!strcmp((const char *) attr->name, "cql"))
 590                     cql_field = mp::xml::get_text(attr->children);
 591                 else
 592                     throw mp::filter::FilterException(
 593                         "Bad attribute " + std::string((const char *)
 594                                                        attr->name));
 595             }
 596             if (cql_field.length())
 597                 fieldmap[cql_field] = ccl_field;
 598         }
 599         else if (!strcmp((const char *) ptr->name, "contentProxy"))
 600         {
 601             const struct _xmlAttr *attr;
 602             for (attr = ptr->properties; attr; attr = attr->next)
 603             {
 604                 if (!strcmp((const char *) attr->name, "server"))
 605                     content_proxy_server = mp::xml::get_text(attr->children);
 606                 else if (!strcmp((const char *) attr->name, "tmp_file"))
 607                     content_tmp_file = mp::xml::get_text(attr->children);
 608                 else
 609                     throw mp::filter::FilterException(
 610                         "Bad attribute " + std::string((const char *)
 611                                                        attr->name));
 612             }
 613         }
 614         else if (!strcmp((const char *) ptr->name, "log"))
 615         {
 616             const struct _xmlAttr *attr;
 617             for (attr = ptr->properties; attr; attr = attr->next)
 618             {
 619                 if (!strcmp((const char *) attr->name, "apdu"))
 620                     apdu_log = mp::xml::get_bool(attr->children, false);
 621                 else
 622                     throw mp::filter::FilterException(
 623                         "Bad attribute " + std::string((const char *)
 624                                                        attr->name));
 625             }
 626         }
 627         else
 628         {
 629             throw mp::filter::FilterException
 630                 ("Bad element "
 631                  + std::string((const char *) ptr->name)
 632                  + " in zoom filter");
 633         }
 634     }
 635 }
 636
 637 yf::Zoom::BackendPtr yf::Zoom::Frontend::get_backend_from_databases(
 638     std::string &database, int *error, char **addinfo, ODR odr)
 639 {
 640     std::list<BackendPtr>::const_iterator map_it;
 641     if (m_backend && m_backend->m_frontend_database == database)
 642         return m_backend;
 643
 644     std::string db_args;
 645     std::string torus_db;
 646     size_t db_arg_pos = database.find(',');
 647     if (db_arg_pos != std::string::npos)
 648     {
 649         torus_db = database.substr(0, db_arg_pos);
 650         db_args = database.substr(db_arg_pos + 1);
 651     }
 652     else
 653         torus_db = database;
 654
 655     SearchablePtr sptr;
 656
 657     std::map<std::string,SearchablePtr>::iterator it;
 658     it = m_p->s_map.find(torus_db);
 659     if (it != m_p->s_map.end())
 660         sptr = it->second;
 661     else
 662     {
 663         xmlDoc *doc = mp::get_searchable(m_p->torus_url, torus_db, m_p->proxy);
 664         if (!doc)
 665         {
 666             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 667             *addinfo = odr_strdup(odr, database.c_str());
 668             BackendPtr b;
 669             return b;
 670         }
 671         const xmlNode *ptr = xmlDocGetRootElement(doc);
 672         if (ptr)
 673         {   // presumably ptr is a records element node
 674             // parse first record in document
 675             for (ptr = ptr->children; ptr; ptr = ptr->next)
 676             {
 677                 if (ptr->type == XML_ELEMENT_NODE
 678                     && !strcmp((const char *) ptr->name, "record"))
 679                 {
 680                     if (sptr)
 681                     {
 682                         *error = YAZ_BIB1_UNSPECIFIED_ERROR;
 683                         *addinfo = (char*) odr_malloc(odr, 40 + database.length()),
 684                         sprintf(*addinfo, "multiple records for udb=%s",
 685                                  database.c_str());
 686                         xmlFreeDoc(doc);
 687                         BackendPtr b;
 688                         return b;
 689                     }
 690                     sptr = m_p->parse_torus_record(ptr);
 691                 }
 692             }
 693         }
 694         xmlFreeDoc(doc);
 695     }
 696
 697     if (!sptr)
 698     {
 699         *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 700         *addinfo = odr_strdup(odr, database.c_str());
 701         BackendPtr b;
 702         return b;
 703     }
 704
 705     xsltStylesheetPtr xsp = 0;
 706     if (sptr->transform_xsl_content.length())
 707     {
 708         xmlDoc *xsp_doc = xmlParseMemory(sptr->transform_xsl_content.c_str(),
 709                                          sptr->transform_xsl_content.length());
 710         if (!xsp_doc)
 711         {
 712             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 713             *addinfo = (char *) odr_malloc(odr, 40);
 714             sprintf(*addinfo, "xmlParseMemory failed");
 715             BackendPtr b;
 716             return b;
 717         }
 718         xsp = xsltParseStylesheetDoc(xsp_doc);
 719         if (!xsp)
 720         {
 721             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 722             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 723             BackendPtr b;
 724             xmlFreeDoc(xsp_doc);
 725             return b;
 726         }
 727     }
 728     else if (sptr->transform_xsl_fname.length())
 729     {
 730         const char *path = 0;
 731
 732         if (m_p->xsldir.length())
 733             path = m_p->xsldir.c_str();
 734         else
 735             path = m_p->file_path.c_str();
 736         std::string fname;
 737
 738         char fullpath[1024];
 739         char *cp = yaz_filepath_resolve(sptr->transform_xsl_fname.c_str(),
 740                                         path, 0, fullpath);
 741         if (cp)
 742             fname.assign(cp);
 743         else
 744         {
 745             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 746             *addinfo = (char *)
 747                 odr_malloc(odr, 40 + sptr->transform_xsl_fname.length());
 748             sprintf(*addinfo, "File could not be read: %s",
 749                     sptr->transform_xsl_fname.c_str());
 750             BackendPtr b;
 751             return b;
 752         }
 753         xmlDoc *xsp_doc = xmlParseFile(fname.c_str());
 754         if (!xsp_doc)
 755         {
 756             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 757             *addinfo = (char *) odr_malloc(odr, 40 + fname.length());
 758             sprintf(*addinfo, "xmlParseFile failed. File: %s", fname.c_str());
 759             BackendPtr b;
 760             return b;
 761         }
 762         xsp = xsltParseStylesheetDoc(xsp_doc);
 763         if (!xsp)
 764         {
 765             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 766             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 767             BackendPtr b;
 768             xmlFreeDoc(xsp_doc);
 769             return b;
 770         }
 771     }
 772
 773     m_backend.reset();
 774
 775     BackendPtr b(new Backend(sptr));
 776
 777     b->xsp = xsp;
 778     b->m_frontend_database = database;
 779
 780     if (sptr->query_encoding.length())
 781         b->set_option("rpnCharset", sptr->query_encoding);
 782
 783     b->set_option("timeout", "40");
 784
 785     if (m_p->apdu_log)
 786         b->set_option("apdulog", "1");
 787
 788     if (sptr->piggyback)
 789         b->set_option("count", "1"); /* some SRU servers INSIST on getting
 790                                         maximumRecords > 0 */
 791     b->set_option("piggyback", sptr->piggyback ? "1" : "0");
 792
 793     std::string authentication = sptr->authentication;
 794     std::string proxy = sptr->cfProxy;
 795
 796     const char *param_user = 0;
 797     const char *param_password = 0;
 798     const char *param_proxy = 0;
 799     if (db_args.length())
 800     {
 801         char **names;
 802         char **values;
 803         int i;
 804         int no_parms = yaz_uri_to_array(db_args.c_str(),
 805                                         odr, &names, &values);
 806         for (i = 0; i < no_parms; i++)
 807         {
 808             const char *name = names[i];
 809             const char *value = values[i];
 810             if (!strcmp(name, "user"))
 811                 param_user = value;
 812             else if (!strcmp(name, "password"))
 813                 param_password = value;
 814             else if (!strcmp(name, "proxy"))
 815                 param_proxy = value;
 816             else if (!strcmp(name, "cproxysession"))
 817                 ;
 818             else
 819             {
 820                 BackendPtr notfound;
 821                 char *msg = (char*) odr_malloc(odr, strlen(name) + 30);
 822                 *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 823                 sprintf(msg, "Bad database argument: %s", name);
 824                 *addinfo = msg;
 825                 return notfound;
 826             }
 827         }
 828         if (param_user)
 829         {
 830             authentication = std::string(param_user);
 831             if (param_password)
 832                 authentication += "/" + std::string(param_password);
 833         }
 834         if (param_proxy)
 835             proxy = param_proxy;
 836     }
 837
 838     if (sptr->cfAuth.length())
 839     {
 840         // A CF target
 841         b->set_option("user", sptr->cfAuth);
 842         if (!param_user && !param_password && authentication.length())
 843         {
 844             if (db_args.length())
 845                 db_args += "&";
 846             // no database (auth) args specified already.. and the
 847             // Torus authentication has it.. Generate the args that CF
 848             // understands..
 849             size_t found = authentication.find('/');
 850             if (found != std::string::npos)
 851             {
 852                 db_args += "user=" +
 853                     mp::util::uri_encode(authentication.substr(0, found))
 854                     + "&password=" +
 855                     mp::util::uri_encode(authentication.substr(found+1));
 856             }
 857             else
 858                 db_args += "user=" + mp::util::uri_encode(authentication);
 859         }
 860         if (!param_proxy && proxy.length())
 861         {
 862             if (db_args.length())
 863                 db_args += "&";
 864             db_args += "proxy=" + mp::util::uri_encode(proxy);
 865         }
 866         if (sptr->cfSubDb.length())
 867         {
 868             if (db_args.length())
 869                 db_args += "&";
 870             db_args += "subdatabase=" + mp::util::uri_encode(sptr->cfSubDb);
 871         }
 872     }
 873     else
 874     {
 875         db_args.clear(); // no arguments to be passed (non-CF)
 876
 877         size_t found = authentication.find('/');
 878
 879         if (sptr->sru.length() && found != std::string::npos)
 880         {
 881             b->set_option("user", authentication.substr(0, found));
 882             b->set_option("password", authentication.substr(found+1));
 883         }
 884         else
 885             b->set_option("user", authentication);
 886
 887         if (proxy.length())
 888             b->set_option("proxy", proxy);
 889     }
 890     if (b->sptr->contentConnector.length())
 891     {
 892         char *fname = (char *) xmalloc(m_p->content_tmp_file.length() + 8);
 893         strcpy(fname, m_p->content_tmp_file.c_str());
 894         char *xx = strstr(fname, "XXXXXX");
 895         if (!xx)
 896         {
 897             xx = fname + strlen(fname);
 898             strcat(fname, "XXXXXX");
 899         }
 900         char tmp_char = xx[6];
 901         sprintf(xx, "%06d", ((unsigned) rand()) % 1000000);
 902         xx[6] = tmp_char;
 903
 904         FILE *file = fopen(fname, "w");
 905         if (!file)
 906         {
 907             yaz_log(YLOG_WARN|YLOG_ERRNO, "create %s", fname);
 908             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 909             *addinfo = (char *)  odr_malloc(odr, 40 + strlen(fname));
 910             sprintf(*addinfo, "Could not create %s", fname);
 911             xfree(fname);
 912             BackendPtr backend_null;
 913             return backend_null;
 914         }
 915         b->content_session_id.assign(xx, 6);
 916         WRBUF w = wrbuf_alloc();
 917         wrbuf_puts(w, "#content_proxy\n");
 918         wrbuf_printf(w, "connector: %s\n", b->sptr->contentConnector.c_str());
 919         if (authentication.length())
 920             wrbuf_printf(w, "auth: %s\n", authentication.c_str());
 921         if (proxy.length())
 922             wrbuf_printf(w, "proxy: %s\n", proxy.c_str());
 923         if (sptr->cfProxy.length())
 924             wrbuf_printf(w, "cfproxy: %s\n", sptr->cfProxy.c_str());
 925
 926         fwrite(wrbuf_buf(w), 1, wrbuf_len(w), file);
 927         fclose(file);
 928         yaz_log(YLOG_LOG, "file %s created\n", fname);
 929         xfree(fname);
 930     }
 931
 932     std::string url;
 933     if (sptr->sru.length())
 934     {
 935         url = "http://" + sptr->target;
 936         b->set_option("sru", sptr->sru);
 937     }
 938     else
 939     {
 940         url = sptr->target;
 941     }
 942     if (db_args.length())
 943         url += "," + db_args;
 944     yaz_log(YLOG_LOG, "url=%s", url.c_str());
 945     b->connect(url, error, addinfo, odr);
 946     if (*error == 0)
 947     {
 948         m_backend = b;
 949     }
 950     return b;
 951 }
 952
 953 void yf::Zoom::Frontend::prepare_elements(BackendPtr b,
 954                                           Odr_oid *preferredRecordSyntax,
 955                                           const char *element_set_name,
 956                                           bool &enable_pz2_retrieval,
 957                                           bool &enable_pz2_transform,
 958                                           bool &assume_marc8_charset)
 959
 960 {
 961     char oid_name_str[OID_STR_MAX];
 962     const char *syntax_name = 0;
 963
 964     if (preferredRecordSyntax &&
 965         !oid_oidcmp(preferredRecordSyntax, yaz_oid_recsyn_xml)
 966         && element_set_name)
 967     {
 968         if (!strcmp(element_set_name, m_p->element_transform.c_str()))
 969         {
 970             enable_pz2_retrieval = true;
 971             enable_pz2_transform = true;
 972         }
 973         else if (!strcmp(element_set_name, m_p->element_raw.c_str()))
 974         {
 975             enable_pz2_retrieval = true;
 976         }
 977     }
 978
 979     if (enable_pz2_retrieval)
 980     {
 981         std::string configured_request_syntax = b->sptr->request_syntax;
 982         if (configured_request_syntax.length())
 983         {
 984             syntax_name = configured_request_syntax.c_str();
 985             const Odr_oid *syntax_oid =
 986                 yaz_string_to_oid(yaz_oid_std(), CLASS_RECSYN, syntax_name);
 987             if (!oid_oidcmp(syntax_oid, yaz_oid_recsyn_usmarc)
 988                 || !oid_oidcmp(syntax_oid, yaz_oid_recsyn_opac))
 989                 assume_marc8_charset = true;
 990         }
 991     }
 992     else if (preferredRecordSyntax)
 993         syntax_name =
 994             yaz_oid_to_string_buf(preferredRecordSyntax, 0, oid_name_str);
 995
 996     if (b->sptr->sru.length())
 997         syntax_name = "XML";
 998
 999     b->set_option("preferredRecordSyntax", syntax_name);
1000
1001     if (enable_pz2_retrieval)
1002     {
1003         element_set_name = 0;
1004         if (b->sptr->element_set.length())
1005             element_set_name = b->sptr->element_set.c_str();
1006     }
1007
1008     b->set_option("elementSetName", element_set_name);
1009     if (b->sptr->sru.length() && element_set_name)
1010         b->set_option("schema", element_set_name);
1011 }
1012
1013 Z_Records *yf::Zoom::Frontend::get_records(Odr_int start,
1014                                            Odr_int number_to_present,
1015                                            int *error,
1016                                            char **addinfo,
1017                                            Odr_int *number_of_records_returned,
1018                                            ODR odr,
1019                                            BackendPtr b,
1020                                            Odr_oid *preferredRecordSyntax,
1021                                            const char *element_set_name)
1022 {
1023     *number_of_records_returned = 0;
1024     Z_Records *records = 0;
1025     bool enable_pz2_retrieval = false; // whether target profile is used
1026     bool enable_pz2_transform = false; // whether XSLT is used as well
1027     bool assume_marc8_charset = false;
1028
1029     prepare_elements(b, preferredRecordSyntax,
1030                      element_set_name,
1031                      enable_pz2_retrieval,
1032                      enable_pz2_transform,
1033                      assume_marc8_charset);
1034
1035     if (start < 0 || number_to_present <=0)
1036         return records;
1037
1038     if (number_to_present > 10000)
1039         number_to_present = 10000;
1040
1041     ZOOM_record *recs = (ZOOM_record *)
1042         odr_malloc(odr, (size_t) number_to_present * sizeof(*recs));
1043
1044     b->present(start, number_to_present, recs, error, addinfo, odr);
1045
1046     int i = 0;
1047     if (!*error)
1048     {
1049         for (i = 0; i < number_to_present; i++)
1050             if (!recs[i])
1051                 break;
1052     }
1053     if (i > 0)
1054     {  // only return records if no error and at least one record
1055         char *odr_database = odr_strdup(odr,
1056                                         b->m_frontend_database.c_str());
1057         Z_NamePlusRecordList *npl = (Z_NamePlusRecordList *)
1058             odr_malloc(odr, sizeof(*npl));
1059         *number_of_records_returned = i;
1060         npl->num_records = i;
1061         npl->records = (Z_NamePlusRecord **)
1062             odr_malloc(odr, i * sizeof(*npl->records));
1063         for (i = 0; i < number_to_present; i++)
1064         {
1065             Z_NamePlusRecord *npr = 0;
1066             const char *addinfo;
1067             int sur_error = ZOOM_record_error(recs[i], 0 /* msg */,
1068                                               &addinfo, 0 /* diagset */);
1069
1070             if (sur_error)
1071             {
1072                 npr = zget_surrogateDiagRec(odr, odr_database, sur_error,
1073                                             addinfo);
1074             }
1075             else if (enable_pz2_retrieval)
1076             {
1077                 char rec_type_str[100];
1078                 const char *record_encoding = 0;
1079
1080                 if (b->sptr->record_encoding.length())
1081                     record_encoding = b->sptr->record_encoding.c_str();
1082                 else if (assume_marc8_charset)
1083                     record_encoding = "marc8";
1084
1085                 strcpy(rec_type_str, b->sptr->use_turbomarc ? "txml" : "xml");
1086                 if (record_encoding)
1087                 {
1088                     strcat(rec_type_str, "; charset=");
1089                     strcat(rec_type_str, record_encoding);
1090                 }
1091
1092                 int rec_len;
1093                 xmlChar *xmlrec_buf = 0;
1094                 const char *rec_buf = ZOOM_record_get(recs[i], rec_type_str,
1095                                                       &rec_len);
1096                 if (!rec_buf && !npr)
1097                 {
1098                     std::string addinfo("ZOOM_record_get failed for type ");
1099
1100                     addinfo += rec_type_str;
1101                     npr = zget_surrogateDiagRec(
1102                         odr, odr_database,
1103                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1104                         addinfo.c_str());
1105                 }
1106
1107                 if (rec_buf && b->xsp && enable_pz2_transform)
1108                 {
1109                     xmlDoc *rec_doc = xmlParseMemory(rec_buf, rec_len);
1110                     if (!rec_doc)
1111                     {
1112                         npr = zget_surrogateDiagRec(
1113                             odr, odr_database,
1114                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1115                             "xml parse failed for record");
1116                     }
1117                     else
1118                     {
1119                         xmlDoc *rec_res =
1120                             xsltApplyStylesheet(b->xsp, rec_doc, 0);
1121
1122                         if (rec_res)
1123                         {
1124                             xsltSaveResultToString(&xmlrec_buf, &rec_len,
1125                                                    rec_res, b->xsp);
1126                             rec_buf = (const char *) xmlrec_buf;
1127
1128                             xmlFreeDoc(rec_res);
1129                         }
1130                         if (!rec_buf)
1131                         {
1132                             std::string addinfo;
1133
1134                             addinfo = "xslt apply failed for "
1135                                 + b->sptr->transform_xsl_fname;
1136                             npr = zget_surrogateDiagRec(
1137                                 odr, odr_database,
1138                                 YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1139                                 addinfo.c_str());
1140                         }
1141                         xmlFreeDoc(rec_doc);
1142                     }
1143                 }
1144
1145                 if (rec_buf)
1146                 {
1147                     xmlDoc *doc = xmlParseMemory(rec_buf, rec_len);
1148                     std::string res =
1149                         mp::xml::url_recipe_handle(doc, b->sptr->urlRecipe);
1150                     if (res.length() && b->content_session_id.length())
1151                     {
1152                         size_t off = res.find_first_of("://");
1153                         if (off != std::string::npos)
1154                         {
1155                             char tmp[1024];
1156                             sprintf(tmp, "%s.%s/",
1157                                     b->content_session_id.c_str(),
1158                                     m_p->content_proxy_server.c_str());
1159                             res.insert(off + 3, tmp);
1160                         }
1161                     }
1162                     if (res.length())
1163                     {
1164                         xmlNode *ptr = xmlDocGetRootElement(doc);
1165                         while (ptr && ptr->type != XML_ELEMENT_NODE)
1166                             ptr = ptr->next;
1167                         xmlNode *c =
1168                             xmlNewChild(ptr, 0, BAD_CAST "metadata", 0);
1169                         xmlNewProp(c, BAD_CAST "type", BAD_CAST
1170                                    "generated-url");
1171                         xmlNode * t = xmlNewText(BAD_CAST res.c_str());
1172                         xmlAddChild(c, t);
1173
1174                         if (xmlrec_buf)
1175                             xmlFree(xmlrec_buf);
1176
1177                         xmlDocDumpMemory(doc, &xmlrec_buf, &rec_len);
1178                         rec_buf = (const char *) xmlrec_buf;
1179                     }
1180                     xmlFreeDoc(doc);
1181                 }
1182                 if (!npr)
1183                 {
1184                     if (!rec_buf)
1185                         npr = zget_surrogateDiagRec(
1186                             odr, odr_database,
1187                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1188                             rec_type_str);
1189                     else
1190                     {
1191                         npr = (Z_NamePlusRecord *)
1192                             odr_malloc(odr, sizeof(*npr));
1193                         npr->databaseName = odr_database;
1194                         npr->which = Z_NamePlusRecord_databaseRecord;
1195                         npr->u.databaseRecord =
1196                             z_ext_record_xml(odr, rec_buf, rec_len);
1197                     }
1198                 }
1199                 if (xmlrec_buf)
1200                     xmlFree(xmlrec_buf);
1201             }
1202             else
1203             {
1204                 Z_External *ext =
1205                     (Z_External *) ZOOM_record_get(recs[i], "ext", 0);
1206                 if (ext)
1207                 {
1208                     npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
1209                     npr->databaseName = odr_database;
1210                     npr->which = Z_NamePlusRecord_databaseRecord;
1211                     npr->u.databaseRecord = ext;
1212                 }
1213                 else
1214                 {
1215                     npr = zget_surrogateDiagRec(
1216                         odr, odr_database,
1217                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1218                         "ZOOM_record, type ext");
1219                 }
1220             }
1221             npl->records[i] = npr;
1222         }
1223         records = (Z_Records*) odr_malloc(odr, sizeof(*records));
1224         records->which = Z_Records_DBOSD;
1225         records->u.databaseOrSurDiagnostics = npl;
1226     }
1227     return records;
1228 }
1229
1230 struct cql_node *yf::Zoom::Impl::convert_cql_fields(struct cql_node *cn,
1231                                                     ODR odr)
1232 {
1233     struct cql_node *r = 0;
1234     if (!cn)
1235         return 0;
1236     switch (cn->which)
1237     {
1238     case CQL_NODE_ST:
1239         if (cn->u.st.index)
1240         {
1241             std::map<std::string,std::string>::const_iterator it;
1242             it = fieldmap.find(cn->u.st.index);
1243             if (it == fieldmap.end())
1244                 return cn;
1245             if (it->second.length())
1246                 cn->u.st.index = odr_strdup(odr, it->second.c_str());
1247             else
1248                 cn->u.st.index = 0;
1249         }
1250         break;
1251     case CQL_NODE_BOOL:
1252         r = convert_cql_fields(cn->u.boolean.left, odr);
1253         if (!r)
1254             r = convert_cql_fields(cn->u.boolean.right, odr);
1255         break;
1256     case CQL_NODE_SORT:
1257         r = convert_cql_fields(cn->u.sort.search, odr);
1258         break;
1259     }
1260     return r;
1261 }
1262
1263 void yf::Zoom::Frontend::handle_search(mp::Package &package)
1264 {
1265     Z_GDU *gdu = package.request().get();
1266     Z_APDU *apdu_req = gdu->u.z3950;
1267     Z_APDU *apdu_res = 0;
1268     mp::odr odr;
1269     Z_SearchRequest *sr = apdu_req->u.searchRequest;
1270     if (sr->num_databaseNames != 1)
1271     {
1272         apdu_res = odr.create_searchResponse(
1273             apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
1274         package.response() = apdu_res;
1275         return;
1276     }
1277
1278     int error = 0;
1279     char *addinfo = 0;
1280     std::string db(sr->databaseNames[0]);
1281     BackendPtr b = get_backend_from_databases(db, &error, &addinfo, odr);
1282     if (error)
1283     {
1284         apdu_res =
1285             odr.create_searchResponse(apdu_req, error, addinfo);
1286         package.response() = apdu_res;
1287         return;
1288     }
1289
1290     b->set_option("setname", "default");
1291
1292     bool enable_pz2_retrieval = false;
1293     bool enable_pz2_transform = false;
1294     bool assume_marc8_charset = false;
1295     prepare_elements(b, sr->preferredRecordSyntax, 0 /*element_set_name */,
1296                      enable_pz2_retrieval,
1297                      enable_pz2_transform,
1298                      assume_marc8_charset);
1299
1300     Odr_int hits = 0;
1301     Z_Query *query = sr->query;
1302     WRBUF ccl_wrbuf = 0;
1303     WRBUF pqf_wrbuf = 0;
1304     std::string sortkeys;
1305
1306     if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
1307     {
1308         // RPN
1309         pqf_wrbuf = wrbuf_alloc();
1310         yaz_rpnquery_to_wrbuf(pqf_wrbuf, query->u.type_1);
1311     }
1312     else if (query->which == Z_Query_type_2)
1313     {
1314         // CCL
1315         ccl_wrbuf = wrbuf_alloc();
1316         wrbuf_write(ccl_wrbuf, (const char *) query->u.type_2->buf,
1317                     query->u.type_2->len);
1318     }
1319     else if (query->which == Z_Query_type_104 &&
1320              query->u.type_104->which == Z_External_CQL)
1321     {
1322         // CQL
1323         const char *cql = query->u.type_104->u.cql;
1324         CQL_parser cp = cql_parser_create();
1325         int r = cql_parser_string(cp, cql);
1326         if (r)
1327         {
1328             cql_parser_destroy(cp);
1329             apdu_res =
1330                 odr.create_searchResponse(apdu_req,
1331                                           YAZ_BIB1_MALFORMED_QUERY,
1332                                           "CQL syntax error");
1333             package.response() = apdu_res;
1334             return;
1335         }
1336         struct cql_node *cn = cql_parser_result(cp);
1337         struct cql_node *cn_error = m_p->convert_cql_fields(cn, odr);
1338         if (cn_error)
1339         {
1340             // hopefully we are getting a ptr to a index+relation+term node
1341             addinfo = 0;
1342             if (cn_error->which == CQL_NODE_ST)
1343                 addinfo = cn_error->u.st.index;
1344
1345             apdu_res =
1346                 odr.create_searchResponse(apdu_req,
1347                                           YAZ_BIB1_UNSUPP_USE_ATTRIBUTE,
1348                                           addinfo);
1349             package.response() = apdu_res;
1350             return;
1351         }
1352         char ccl_buf[1024];
1353
1354         r = cql_to_ccl_buf(cn, ccl_buf, sizeof(ccl_buf));
1355         if (r == 0)
1356         {
1357             ccl_wrbuf = wrbuf_alloc();
1358             wrbuf_puts(ccl_wrbuf, ccl_buf);
1359
1360             WRBUF sru_sortkeys_wrbuf = wrbuf_alloc();
1361
1362             cql_sortby_to_sortkeys(cn, wrbuf_vp_puts, sru_sortkeys_wrbuf);
1363             WRBUF sort_spec_wrbuf = wrbuf_alloc();
1364             yaz_srw_sortkeys_to_sort_spec(wrbuf_cstr(sru_sortkeys_wrbuf),
1365                                           sort_spec_wrbuf);
1366             wrbuf_destroy(sru_sortkeys_wrbuf);
1367
1368             yaz_tok_cfg_t tc = yaz_tok_cfg_create();
1369             yaz_tok_parse_t tp =
1370                 yaz_tok_parse_buf(tc, wrbuf_cstr(sort_spec_wrbuf));
1371             yaz_tok_cfg_destroy(tc);
1372
1373             /* go through sortspec and map fields */
1374             int token = yaz_tok_move(tp);
1375             while (token != YAZ_TOK_EOF)
1376             {
1377                 if (token == YAZ_TOK_STRING)
1378                 {
1379                     const char *field = yaz_tok_parse_string(tp);
1380                     std::map<std::string,std::string>::iterator it;
1381                     it = b->sptr->sortmap.find(field);
1382                     if (it != b->sptr->sortmap.end())
1383                         sortkeys += it->second;
1384                     else
1385                         sortkeys += field;
1386                 }
1387                 sortkeys += " ";
1388                 token = yaz_tok_move(tp);
1389                 if (token == YAZ_TOK_STRING)
1390                 {
1391                     sortkeys += yaz_tok_parse_string(tp);
1392                 }
1393                 if (token != YAZ_TOK_EOF)
1394                 {
1395                     sortkeys += " ";
1396                     token = yaz_tok_move(tp);
1397                 }
1398             }
1399             yaz_tok_parse_destroy(tp);
1400             wrbuf_destroy(sort_spec_wrbuf);
1401         }
1402         cql_parser_destroy(cp);
1403         if (r)
1404         {
1405             apdu_res =
1406                 odr.create_searchResponse(apdu_req,
1407                                           YAZ_BIB1_MALFORMED_QUERY,
1408                                           "CQL to CCL conversion error");
1409             package.response() = apdu_res;
1410             return;
1411         }
1412     }
1413     else
1414     {
1415         apdu_res =
1416             odr.create_searchResponse(apdu_req, YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
1417         package.response() = apdu_res;
1418         return;
1419     }
1420
1421     if (ccl_wrbuf)
1422     {
1423         // CCL to PQF
1424         assert(pqf_wrbuf == 0);
1425         int cerror, cpos;
1426         struct ccl_rpn_node *cn;
1427         yaz_log(YLOG_LOG, "CCL: %s", wrbuf_cstr(ccl_wrbuf));
1428         cn = ccl_find_str(b->sptr->ccl_bibset, wrbuf_cstr(ccl_wrbuf),
1429                           &cerror, &cpos);
1430         wrbuf_destroy(ccl_wrbuf);
1431         if (!cn)
1432         {
1433             char *addinfo = odr_strdup(odr, ccl_err_msg(cerror));
1434             int z3950_diag = YAZ_BIB1_MALFORMED_QUERY;
1435
1436             switch (cerror)
1437             {
1438             case CCL_ERR_UNKNOWN_QUAL:
1439                 z3950_diag = YAZ_BIB1_UNSUPP_USE_ATTRIBUTE;
1440                 break;
1441             case CCL_ERR_TRUNC_NOT_LEFT:
1442             case CCL_ERR_TRUNC_NOT_RIGHT:
1443             case CCL_ERR_TRUNC_NOT_BOTH:
1444                 z3950_diag = YAZ_BIB1_UNSUPP_TRUNCATION_ATTRIBUTE;
1445                 break;
1446             }
1447             apdu_res =
1448                 odr.create_searchResponse(apdu_req, z3950_diag, addinfo);
1449             package.response() = apdu_res;
1450             return;
1451         }
1452         pqf_wrbuf = wrbuf_alloc();
1453         ccl_pquery(pqf_wrbuf, cn);
1454         yaz_log(YLOG_LOG, "RPN: %s", wrbuf_cstr(pqf_wrbuf));
1455         ccl_rpn_delete(cn);
1456     }
1457
1458     assert(pqf_wrbuf);
1459
1460     ZOOM_query q = ZOOM_query_create();
1461     ZOOM_query_sortby2(q, b->sptr->sortStrategy.c_str(), sortkeys.c_str());
1462
1463     if (b->get_option("sru"))
1464     {
1465         int status = 0;
1466         Z_RPNQuery *zquery;
1467         zquery = p_query_rpn(odr, wrbuf_cstr(pqf_wrbuf));
1468         WRBUF wrb = wrbuf_alloc();
1469
1470         if (!strcmp(b->get_option("sru"), "solr"))
1471         {
1472             solr_transform_t cqlt = solr_transform_create();
1473
1474             status = solr_transform_rpn2solr_wrbuf(cqlt, wrb, zquery);
1475
1476             solr_transform_close(cqlt);
1477         }
1478         else
1479         {
1480             cql_transform_t cqlt = cql_transform_create();
1481
1482             status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery);
1483
1484             cql_transform_close(cqlt);
1485         }
1486         if (status == 0)
1487         {
1488             ZOOM_query_cql(q, wrbuf_cstr(wrb));
1489             yaz_log(YLOG_LOG, "CQL: %s", wrbuf_cstr(wrb));
1490             b->search(q, &hits, &error, &addinfo, odr);
1491         }
1492         ZOOM_query_destroy(q);
1493
1494         wrbuf_destroy(wrb);
1495         wrbuf_destroy(pqf_wrbuf);
1496         if (status)
1497         {
1498             apdu_res =
1499                 odr.create_searchResponse(apdu_req, YAZ_BIB1_MALFORMED_QUERY,
1500                                           "can not convert from RPN to CQL/SOLR");
1501             package.response() = apdu_res;
1502             return;
1503         }
1504     }
1505     else
1506     {
1507         ZOOM_query_prefix(q, wrbuf_cstr(pqf_wrbuf));
1508         yaz_log(YLOG_LOG, "search PQF: %s", wrbuf_cstr(pqf_wrbuf));
1509         b->search(q, &hits, &error, &addinfo, odr);
1510         ZOOM_query_destroy(q);
1511         wrbuf_destroy(pqf_wrbuf);
1512     }
1513
1514     const char *element_set_name = 0;
1515     Odr_int number_to_present = 0;
1516     if (!error)
1517         mp::util::piggyback_sr(sr, hits, number_to_present, &element_set_name);
1518
1519     Odr_int number_of_records_returned = 0;
1520     Z_Records *records = get_records(
1521         0, number_to_present, &error, &addinfo,
1522         &number_of_records_returned, odr, b, sr->preferredRecordSyntax,
1523         element_set_name);
1524     apdu_res = odr.create_searchResponse(apdu_req, error, addinfo);
1525     if (records)
1526     {
1527         apdu_res->u.searchResponse->records = records;
1528         apdu_res->u.searchResponse->numberOfRecordsReturned =
1529             odr_intdup(odr, number_of_records_returned);
1530     }
1531     apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
1532     package.response() = apdu_res;
1533 }
1534
1535 void yf::Zoom::Frontend::handle_present(mp::Package &package)
1536 {
1537     Z_GDU *gdu = package.request().get();
1538     Z_APDU *apdu_req = gdu->u.z3950;
1539     Z_APDU *apdu_res = 0;
1540     Z_PresentRequest *pr = apdu_req->u.presentRequest;
1541
1542     mp::odr odr;
1543     if (!m_backend)
1544     {
1545         package.response() = odr.create_presentResponse(
1546             apdu_req, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST, 0);
1547         return;
1548     }
1549     const char *element_set_name = 0;
1550     Z_RecordComposition *comp = pr->recordComposition;
1551     if (comp && comp->which != Z_RecordComp_simple)
1552     {
1553         package.response() = odr.create_presentResponse(
1554             apdu_req,
1555             YAZ_BIB1_PRESENT_COMP_SPEC_PARAMETER_UNSUPP, 0);
1556         return;
1557     }
1558     if (comp && comp->u.simple->which == Z_ElementSetNames_generic)
1559         element_set_name = comp->u.simple->u.generic;
1560     Odr_int number_of_records_returned = 0;
1561     int error = 0;
1562     char *addinfo = 0;
1563     Z_Records *records = get_records(
1564         *pr->resultSetStartPoint - 1, *pr->numberOfRecordsRequested,
1565         &error, &addinfo, &number_of_records_returned, odr, m_backend,
1566         pr->preferredRecordSyntax, element_set_name);
1567
1568     apdu_res = odr.create_presentResponse(apdu_req, error, addinfo);
1569     if (records)
1570     {
1571         apdu_res->u.presentResponse->records = records;
1572         apdu_res->u.presentResponse->numberOfRecordsReturned =
1573             odr_intdup(odr, number_of_records_returned);
1574     }
1575     package.response() = apdu_res;
1576 }
1577
1578 void yf::Zoom::Frontend::handle_package(mp::Package &package)
1579 {
1580     Z_GDU *gdu = package.request().get();
1581     if (!gdu)
1582         ;
1583     else if (gdu->which == Z_GDU_Z3950)
1584     {
1585         Z_APDU *apdu_req = gdu->u.z3950;
1586         if (apdu_req->which == Z_APDU_initRequest)
1587         {
1588             mp::odr odr;
1589             package.response() = odr.create_close(
1590                 apdu_req,
1591                 Z_Close_protocolError,
1592                 "double init");
1593         }
1594         else if (apdu_req->which == Z_APDU_searchRequest)
1595         {
1596             handle_search(package);
1597         }
1598         else if (apdu_req->which == Z_APDU_presentRequest)
1599         {
1600             handle_present(package);
1601         }
1602         else
1603         {
1604             mp::odr odr;
1605             package.response() = odr.create_close(
1606                 apdu_req,
1607                 Z_Close_protocolError,
1608                 "zoom filter cannot handle this APDU");
1609             package.session().close();
1610         }
1611     }
1612     else
1613     {
1614         package.session().close();
1615     }
1616 }
1617
1618 void yf::Zoom::Impl::process(mp::Package &package)
1619 {
1620     FrontendPtr f = get_frontend(package);
1621     Z_GDU *gdu = package.request().get();
1622
1623     if (f->m_is_virtual)
1624     {
1625         f->handle_package(package);
1626     }
1627     else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1628              Z_APDU_initRequest)
1629     {
1630         Z_InitRequest *req = gdu->u.z3950->u.initRequest;
1631         f->m_init_gdu = gdu;
1632
1633         mp::odr odr;
1634         Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
1635         Z_InitResponse *resp = apdu->u.initResponse;
1636
1637         int i;
1638         static const int masks[] = {
1639             Z_Options_search,
1640             Z_Options_present,
1641             -1
1642         };
1643         for (i = 0; masks[i] != -1; i++)
1644             if (ODR_MASK_GET(req->options, masks[i]))
1645                 ODR_MASK_SET(resp->options, masks[i]);
1646
1647         static const int versions[] = {
1648             Z_ProtocolVersion_1,
1649             Z_ProtocolVersion_2,
1650             Z_ProtocolVersion_3,
1651             -1
1652         };
1653         for (i = 0; versions[i] != -1; i++)
1654             if (ODR_MASK_GET(req->protocolVersion, versions[i]))
1655                 ODR_MASK_SET(resp->protocolVersion, versions[i]);
1656             else
1657                 break;
1658
1659         *resp->preferredMessageSize = *req->preferredMessageSize;
1660         *resp->maximumRecordSize = *req->maximumRecordSize;
1661
1662         package.response() = apdu;
1663         f->m_is_virtual = true;
1664     }
1665     else
1666         package.move();
1667
1668     release_frontend(package);
1669 }
1670
1671
1672 static mp::filter::Base* filter_creator()
1673 {
1674     return new mp::filter::Zoom;
1675 }
1676
1677 extern "C" {
1678     struct metaproxy_1_filter_struct metaproxy_1_filter_zoom = {
1679         0,
1680         "zoom",
1681         filter_creator
1682     };
1683 }
1684
1685
1686 /*
1687  * Local variables:
1688  * c-basic-offset: 4
1689  * c-file-style: "Stroustrup"
1690  * indent-tabs-mode: nil
1691  * End:
1692  * vim: shiftwidth=4 tabstop=8 expandtab
1693  */
1694