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(const mp::Package &package,
 117                                                   std::string &database,
 118                                                   int *error,
 119                                                   char **addinfo,
 120                                                   ODR odr);
 121
 122
 123             void prepare_elements(BackendPtr b,
 124                                   Odr_oid *preferredRecordSyntax,
 125                                   const char *element_set_name,
 126                                   bool &enable_pz2_retrieval,
 127                                   bool &enable_pz2_transform,
 128                                   bool &assume_marc8_charset);
 129
 130             Z_Records *get_records(Odr_int start,
 131                                    Odr_int number_to_present,
 132                                    int *error,
 133                                    char **addinfo,
 134                                    Odr_int *number_of_records_returned,
 135                                    ODR odr, BackendPtr b,
 136                                    Odr_oid *preferredRecordSyntax,
 137                                    const char *element_set_name);
 138         public:
 139             Frontend(Impl *impl);
 140             ~Frontend();
 141         };
 142         class Zoom::Impl {
 143             friend class Frontend;
 144         public:
 145             Impl();
 146             ~Impl();
 147             void process(metaproxy_1::Package & package);
 148             void configure(const xmlNode * ptr, bool test_only,
 149                            const char *path);
 150         private:
 151             void configure_local_records(const xmlNode * ptr, bool test_only);
 152             FrontendPtr get_frontend(mp::Package &package);
 153             void release_frontend(mp::Package &package);
 154             SearchablePtr parse_torus_record(const xmlNode *ptr);
 155             struct cql_node *convert_cql_fields(struct cql_node *cn, ODR odr);
 156             std::map<mp::Session, FrontendPtr> m_clients;
 157             boost::mutex m_mutex;
 158             boost::condition m_cond_session_ready;
 159             std::string torus_url;
 160             std::map<std::string,std::string> fieldmap;
 161             std::string xsldir;
 162             std::string file_path;
 163             std::string content_proxy_server;
 164             std::string content_tmp_file;
 165             bool apdu_log;
 166             CCL_bibset bibset;
 167             std::string element_transform;
 168             std::string element_raw;
 169             std::string proxy;
 170             std::map<std::string,SearchablePtr> s_map;
 171         };
 172     }
 173 }
 174
 175 // define Pimpl wrapper forwarding to Impl
 176
 177 yf::Zoom::Zoom() : m_p(new Impl)
 178 {
 179 }
 180
 181 yf::Zoom::~Zoom()
 182 {  // must have a destructor because of boost::scoped_ptr
 183 }
 184
 185 void yf::Zoom::configure(const xmlNode *xmlnode, bool test_only,
 186                          const char *path)
 187 {
 188     m_p->configure(xmlnode, test_only, path);
 189 }
 190
 191 void yf::Zoom::process(mp::Package &package) const
 192 {
 193     m_p->process(package);
 194 }
 195
 196
 197 // define Implementation stuff
 198
 199 yf::Zoom::Backend::Backend(SearchablePtr ptr) : sptr(ptr)
 200 {
 201     m_connection = ZOOM_connection_create(0);
 202     m_resultset = 0;
 203     xsp = 0;
 204 }
 205
 206 yf::Zoom::Backend::~Backend()
 207 {
 208     if (xsp)
 209         xsltFreeStylesheet(xsp);
 210     ZOOM_connection_destroy(m_connection);
 211     ZOOM_resultset_destroy(m_resultset);
 212 }
 213
 214
 215 void yf::Zoom::Backend::get_zoom_error(int *error, char **addinfo,
 216                                        ODR odr)
 217 {
 218     const char *msg = 0;
 219     const char *zoom_addinfo = 0;
 220     const char *dset = 0;
 221     *error = ZOOM_connection_error_x(m_connection, &msg, &zoom_addinfo, &dset);
 222     if (*error)
 223     {
 224         if (*error >= ZOOM_ERROR_CONNECT)
 225         {
 226             // turn ZOOM diagnostic into a Bib-1 2: with addinfo=zoom err msg
 227             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 228             *addinfo = (char *) odr_malloc(
 229                 odr, 20 + strlen(msg) +
 230                 (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 231             strcpy(*addinfo, msg);
 232             if (zoom_addinfo)
 233             {
 234                 strcat(*addinfo, ": ");
 235                 strcat(*addinfo, zoom_addinfo);
 236                 strcat(*addinfo, " ");
 237             }
 238         }
 239         else
 240         {
 241             if (dset && !strcmp(dset, "info:srw/diagnostic/1"))
 242                 *error = yaz_diag_srw_to_bib1(*error);
 243             *addinfo = (char *) odr_malloc(
 244                 odr, 20 + (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 245             **addinfo = '\0';
 246             if (zoom_addinfo && *zoom_addinfo)
 247             {
 248                 strcpy(*addinfo, zoom_addinfo);
 249                 strcat(*addinfo, " ");
 250             }
 251             strcat(*addinfo, "(backend)");
 252         }
 253     }
 254 }
 255
 256 void yf::Zoom::Backend::connect(std::string zurl,
 257                                 int *error, char **addinfo,
 258                                 ODR odr)
 259 {
 260     ZOOM_connection_connect(m_connection, zurl.c_str(), 0);
 261     get_zoom_error(error, addinfo, odr);
 262 }
 263
 264 void yf::Zoom::Backend::search(ZOOM_query q, Odr_int *hits,
 265                                int *error, char **addinfo, ODR odr)
 266 {
 267     m_resultset = ZOOM_connection_search(m_connection, q);
 268     get_zoom_error(error, addinfo, odr);
 269     if (*error == 0)
 270         *hits = ZOOM_resultset_size(m_resultset);
 271     else
 272         *hits = 0;
 273 }
 274
 275 void yf::Zoom::Backend::present(Odr_int start, Odr_int number,
 276                                 ZOOM_record *recs,
 277                                 int *error, char **addinfo, ODR odr)
 278 {
 279     ZOOM_resultset_records(m_resultset, recs, start, number);
 280     get_zoom_error(error, addinfo, odr);
 281 }
 282
 283 void yf::Zoom::Backend::set_option(const char *name, const char *value)
 284 {
 285     ZOOM_connection_option_set(m_connection, name, value);
 286     if (m_resultset)
 287         ZOOM_resultset_option_set(m_resultset, name, value);
 288 }
 289
 290 void yf::Zoom::Backend::set_option(const char *name, std::string value)
 291 {
 292     set_option(name, value.c_str());
 293 }
 294
 295 const char *yf::Zoom::Backend::get_option(const char *name)
 296 {
 297     return ZOOM_connection_option_get(m_connection, name);
 298 }
 299
 300 yf::Zoom::Searchable::Searchable(CCL_bibset base)
 301 {
 302     piggyback = true;
 303     use_turbomarc = true;
 304     sortStrategy = "embed";
 305     ccl_bibset = ccl_qual_dup(base);
 306 }
 307
 308 yf::Zoom::Searchable::~Searchable()
 309 {
 310     ccl_qual_rm(&ccl_bibset);
 311 }
 312
 313 yf::Zoom::Frontend::Frontend(Impl *impl) :
 314     m_p(impl), m_is_virtual(false), m_in_use(true)
 315 {
 316 }
 317
 318 yf::Zoom::Frontend::~Frontend()
 319 {
 320 }
 321
 322 yf::Zoom::FrontendPtr yf::Zoom::Impl::get_frontend(mp::Package &package)
 323 {
 324     boost::mutex::scoped_lock lock(m_mutex);
 325
 326     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 327
 328     while(true)
 329     {
 330         it = m_clients.find(package.session());
 331         if (it == m_clients.end())
 332             break;
 333
 334         if (!it->second->m_in_use)
 335         {
 336             it->second->m_in_use = true;
 337             return it->second;
 338         }
 339         m_cond_session_ready.wait(lock);
 340     }
 341     FrontendPtr f(new Frontend(this));
 342     m_clients[package.session()] = f;
 343     f->m_in_use = true;
 344     return f;
 345 }
 346
 347 void yf::Zoom::Impl::release_frontend(mp::Package &package)
 348 {
 349     boost::mutex::scoped_lock lock(m_mutex);
 350     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 351
 352     it = m_clients.find(package.session());
 353     if (it != m_clients.end())
 354     {
 355         if (package.session().is_closed())
 356         {
 357             m_clients.erase(it);
 358         }
 359         else
 360         {
 361             it->second->m_in_use = false;
 362         }
 363         m_cond_session_ready.notify_all();
 364     }
 365 }
 366
 367 yf::Zoom::Impl::Impl() :
 368     apdu_log(false), element_transform("pz2") , element_raw("raw")
 369 {
 370     bibset = ccl_qual_mk();
 371
 372     srand((unsigned int) time(0));
 373 }
 374
 375 yf::Zoom::Impl::~Impl()
 376 {
 377     ccl_qual_rm(&bibset);
 378 }
 379
 380 yf::Zoom::SearchablePtr yf::Zoom::Impl::parse_torus_record(const xmlNode *ptr)
 381 {
 382     Zoom::SearchablePtr s(new Searchable(bibset));
 383
 384     for (ptr = ptr->children; ptr; ptr = ptr->next)
 385     {
 386         if (ptr->type != XML_ELEMENT_NODE)
 387             continue;
 388         if (!strcmp((const char *) ptr->name, "layer"))
 389             ptr = ptr->children;
 390         else if (!strcmp((const char *) ptr->name,
 391                          "authentication"))
 392         {
 393             s->authentication = mp::xml::get_text(ptr);
 394         }
 395         else if (!strcmp((const char *) ptr->name,
 396                          "cfAuth"))
 397         {
 398             s->cfAuth = mp::xml::get_text(ptr);
 399         }
 400         else if (!strcmp((const char *) ptr->name,
 401                          "cfProxy"))
 402         {
 403             s->cfProxy = mp::xml::get_text(ptr);
 404         }
 405         else if (!strcmp((const char *) ptr->name,
 406                          "cfSubDb"))
 407         {
 408             s->cfSubDb = mp::xml::get_text(ptr);
 409         }
 410         else if (!strcmp((const char *) ptr->name,
 411                          "contentConnector"))
 412         {
 413             s->contentConnector = mp::xml::get_text(ptr);
 414         }
 415         else if (!strcmp((const char *) ptr->name, "udb"))
 416         {
 417             s->udb = mp::xml::get_text(ptr);
 418         }
 419         else if (!strcmp((const char *) ptr->name, "zurl"))
 420         {
 421             s->target = mp::xml::get_text(ptr);
 422         }
 423         else if (!strcmp((const char *) ptr->name, "sru"))
 424         {
 425             s->sru = mp::xml::get_text(ptr);
 426         }
 427         else if (!strcmp((const char *) ptr->name,
 428                          "queryEncoding"))
 429         {
 430             s->query_encoding = mp::xml::get_text(ptr);
 431         }
 432         else if (!strcmp((const char *) ptr->name,
 433                          "piggyback"))
 434         {
 435             s->piggyback = mp::xml::get_bool(ptr, true);
 436         }
 437         else if (!strcmp((const char *) ptr->name,
 438                          "requestSyntax"))
 439         {
 440             s->request_syntax = mp::xml::get_text(ptr);
 441         }
 442         else if (!strcmp((const char *) ptr->name,
 443                          "elementSet"))
 444         {
 445             s->element_set = mp::xml::get_text(ptr);
 446         }
 447         else if (!strcmp((const char *) ptr->name,
 448                          "recordEncoding"))
 449         {
 450             s->record_encoding = mp::xml::get_text(ptr);
 451         }
 452         else if (!strcmp((const char *) ptr->name,
 453                          "transform"))
 454         {
 455             s->transform_xsl_fname = mp::xml::get_text(ptr);
 456         }
 457         else if (!strcmp((const char *) ptr->name,
 458                          "literalTransform"))
 459         {
 460             s->transform_xsl_content = mp::xml::get_text(ptr);
 461         }
 462         else if (!strcmp((const char *) ptr->name,
 463                          "urlRecipe"))
 464         {
 465             s->urlRecipe = mp::xml::get_text(ptr);
 466         }
 467         else if (!strcmp((const char *) ptr->name,
 468                          "useTurboMarc"))
 469         {
 470             ; // useTurboMarc is ignored
 471         }
 472         else if (!strncmp((const char *) ptr->name,
 473                           "cclmap_", 7))
 474         {
 475             std::string value = mp::xml::get_text(ptr);
 476             ccl_qual_fitem(s->ccl_bibset, value.c_str(),
 477                            (const char *) ptr->name + 7);
 478         }
 479         else if (!strncmp((const char *) ptr->name,
 480                           "sortmap_", 8))
 481         {
 482             std::string value = mp::xml::get_text(ptr);
 483             s->sortmap[(const char *) ptr->name + 8] = value;
 484         }
 485         else if (!strcmp((const char *) ptr->name,
 486                           "sortStrategy"))
 487         {
 488             s->sortStrategy = mp::xml::get_text(ptr);
 489         }
 490     }
 491     return s;
 492 }
 493
 494 void yf::Zoom::Impl::configure_local_records(const xmlNode *ptr, bool test_only)
 495 {
 496     while (ptr && ptr->type != XML_ELEMENT_NODE)
 497         ptr = ptr->next;
 498
 499     if (ptr)
 500     {
 501         if (!strcmp((const char *) ptr->name, "records"))
 502         {
 503             for (ptr = ptr->children; ptr; ptr = ptr->next)
 504             {
 505                 if (ptr->type != XML_ELEMENT_NODE)
 506                     continue;
 507                 if (!strcmp((const char *) ptr->name, "record"))
 508                 {
 509                     SearchablePtr s = parse_torus_record(ptr);
 510                     if (s)
 511                     {
 512                         std::string udb = s->udb;
 513                         if (udb.length())
 514                             s_map[s->udb] = s;
 515                         else
 516                         {
 517                             throw mp::filter::FilterException
 518                                 ("No udb for local torus record");
 519                         }
 520                     }
 521                 }
 522                 else
 523                 {
 524                     throw mp::filter::FilterException
 525                         ("Bad element "
 526                          + std::string((const char *) ptr->name)
 527                          + " in zoom filter inside element "
 528                          "<torus><records>");
 529                 }
 530             }
 531         }
 532         else
 533         {
 534             throw mp::filter::FilterException
 535                 ("Bad element "
 536                  + std::string((const char *) ptr->name)
 537                  + " in zoom filter inside element <torus>");
 538         }
 539     }
 540 }
 541
 542 void yf::Zoom::Impl::configure(const xmlNode *ptr, bool test_only,
 543                                const char *path)
 544 {
 545     content_tmp_file = "/tmp/cf.XXXXXX.p";
 546     if (path && *path)
 547     {
 548         file_path = path;
 549     }
 550     for (ptr = ptr->children; ptr; ptr = ptr->next)
 551     {
 552         if (ptr->type != XML_ELEMENT_NODE)
 553             continue;
 554         else if (!strcmp((const char *) ptr->name, "torus"))
 555         {
 556             const struct _xmlAttr *attr;
 557             for (attr = ptr->properties; attr; attr = attr->next)
 558             {
 559                 if (!strcmp((const char *) attr->name, "url"))
 560                     torus_url = mp::xml::get_text(attr->children);
 561                 else if (!strcmp((const char *) attr->name, "xsldir"))
 562                     xsldir = mp::xml::get_text(attr->children);
 563                 else if (!strcmp((const char *) attr->name, "element_transform"))
 564                     element_transform = mp::xml::get_text(attr->children);
 565                 else if (!strcmp((const char *) attr->name, "element_raw"))
 566                     element_raw = mp::xml::get_text(attr->children);
 567                 else if (!strcmp((const char *) attr->name, "proxy"))
 568                     proxy = mp::xml::get_text(attr->children);
 569                 else
 570                     throw mp::filter::FilterException(
 571                         "Bad attribute " + std::string((const char *)
 572                                                        attr->name));
 573             }
 574             configure_local_records(ptr->children, test_only);
 575         }
 576         else if (!strcmp((const char *) ptr->name, "cclmap"))
 577         {
 578             const char *addinfo = 0;
 579             ccl_xml_config(bibset, ptr, &addinfo);
 580         }
 581         else if (!strcmp((const char *) ptr->name, "fieldmap"))
 582         {
 583             const struct _xmlAttr *attr;
 584             std::string ccl_field;
 585             std::string cql_field;
 586             for (attr = ptr->properties; attr; attr = attr->next)
 587             {
 588                 if (!strcmp((const char *) attr->name, "ccl"))
 589                     ccl_field = mp::xml::get_text(attr->children);
 590                 else if (!strcmp((const char *) attr->name, "cql"))
 591                     cql_field = mp::xml::get_text(attr->children);
 592                 else
 593                     throw mp::filter::FilterException(
 594                         "Bad attribute " + std::string((const char *)
 595                                                        attr->name));
 596             }
 597             if (cql_field.length())
 598                 fieldmap[cql_field] = ccl_field;
 599         }
 600         else if (!strcmp((const char *) ptr->name, "contentProxy"))
 601         {
 602             const struct _xmlAttr *attr;
 603             for (attr = ptr->properties; attr; attr = attr->next)
 604             {
 605                 if (!strcmp((const char *) attr->name, "server"))
 606                     content_proxy_server = mp::xml::get_text(attr->children);
 607                 else if (!strcmp((const char *) attr->name, "tmp_file"))
 608                     content_tmp_file = mp::xml::get_text(attr->children);
 609                 else
 610                     throw mp::filter::FilterException(
 611                         "Bad attribute " + std::string((const char *)
 612                                                        attr->name));
 613             }
 614         }
 615         else if (!strcmp((const char *) ptr->name, "log"))
 616         {
 617             const struct _xmlAttr *attr;
 618             for (attr = ptr->properties; attr; attr = attr->next)
 619             {
 620                 if (!strcmp((const char *) attr->name, "apdu"))
 621                     apdu_log = mp::xml::get_bool(attr->children, false);
 622                 else
 623                     throw mp::filter::FilterException(
 624                         "Bad attribute " + std::string((const char *)
 625                                                        attr->name));
 626             }
 627         }
 628         else
 629         {
 630             throw mp::filter::FilterException
 631                 ("Bad element "
 632                  + std::string((const char *) ptr->name)
 633                  + " in zoom filter");
 634         }
 635     }
 636 }
 637
 638 yf::Zoom::BackendPtr yf::Zoom::Frontend::get_backend_from_databases(
 639     const mp::Package &package,
 640     std::string &database, int *error, char **addinfo, ODR odr)
 641 {
 642     std::list<BackendPtr>::const_iterator map_it;
 643     if (m_backend && m_backend->m_frontend_database == database)
 644         return m_backend;
 645
 646     std::string db_args;
 647     std::string torus_db;
 648     size_t db_arg_pos = database.find(',');
 649     if (db_arg_pos != std::string::npos)
 650     {
 651         torus_db = database.substr(0, db_arg_pos);
 652         db_args = database.substr(db_arg_pos + 1);
 653     }
 654     else
 655         torus_db = database;
 656
 657     SearchablePtr sptr;
 658
 659     std::map<std::string,SearchablePtr>::iterator it;
 660     it = m_p->s_map.find(torus_db);
 661     if (it != m_p->s_map.end())
 662         sptr = it->second;
 663     else if (m_p->torus_url.length() > 0)
 664     {
 665         xmlDoc *doc = mp::get_searchable(m_p->torus_url, torus_db, m_p->proxy);
 666         if (!doc)
 667         {
 668             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 669             *addinfo = odr_strdup(odr, database.c_str());
 670             BackendPtr b;
 671             return b;
 672         }
 673         const xmlNode *ptr = xmlDocGetRootElement(doc);
 674         if (ptr)
 675         {   // presumably ptr is a records element node
 676             // parse first record in document
 677             for (ptr = ptr->children; ptr; ptr = ptr->next)
 678             {
 679                 if (ptr->type == XML_ELEMENT_NODE
 680                     && !strcmp((const char *) ptr->name, "record"))
 681                 {
 682                     if (sptr)
 683                     {
 684                         *error = YAZ_BIB1_UNSPECIFIED_ERROR;
 685                         *addinfo = (char*) odr_malloc(odr, 40 + database.length()),
 686                         sprintf(*addinfo, "multiple records for udb=%s",
 687                                  database.c_str());
 688                         xmlFreeDoc(doc);
 689                         BackendPtr b;
 690                         return b;
 691                     }
 692                     sptr = m_p->parse_torus_record(ptr);
 693                 }
 694             }
 695         }
 696         xmlFreeDoc(doc);
 697     }
 698
 699     if (!sptr)
 700     {
 701         *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 702         *addinfo = odr_strdup(odr, database.c_str());
 703         BackendPtr b;
 704         return b;
 705     }
 706
 707     xsltStylesheetPtr xsp = 0;
 708     if (sptr->transform_xsl_content.length())
 709     {
 710         xmlDoc *xsp_doc = xmlParseMemory(sptr->transform_xsl_content.c_str(),
 711                                          sptr->transform_xsl_content.length());
 712         if (!xsp_doc)
 713         {
 714             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 715             *addinfo = (char *) odr_malloc(odr, 40);
 716             sprintf(*addinfo, "xmlParseMemory failed");
 717             BackendPtr b;
 718             return b;
 719         }
 720         xsp = xsltParseStylesheetDoc(xsp_doc);
 721         if (!xsp)
 722         {
 723             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 724             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 725             BackendPtr b;
 726             xmlFreeDoc(xsp_doc);
 727             return b;
 728         }
 729     }
 730     else if (sptr->transform_xsl_fname.length())
 731     {
 732         const char *path = 0;
 733
 734         if (m_p->xsldir.length())
 735             path = m_p->xsldir.c_str();
 736         else
 737             path = m_p->file_path.c_str();
 738         std::string fname;
 739
 740         char fullpath[1024];
 741         char *cp = yaz_filepath_resolve(sptr->transform_xsl_fname.c_str(),
 742                                         path, 0, fullpath);
 743         if (cp)
 744             fname.assign(cp);
 745         else
 746         {
 747             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 748             *addinfo = (char *)
 749                 odr_malloc(odr, 40 + sptr->transform_xsl_fname.length());
 750             sprintf(*addinfo, "File could not be read: %s",
 751                     sptr->transform_xsl_fname.c_str());
 752             BackendPtr b;
 753             return b;
 754         }
 755         xmlDoc *xsp_doc = xmlParseFile(fname.c_str());
 756         if (!xsp_doc)
 757         {
 758             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 759             *addinfo = (char *) odr_malloc(odr, 40 + fname.length());
 760             sprintf(*addinfo, "xmlParseFile failed. File: %s", fname.c_str());
 761             BackendPtr b;
 762             return b;
 763         }
 764         xsp = xsltParseStylesheetDoc(xsp_doc);
 765         if (!xsp)
 766         {
 767             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 768             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 769             BackendPtr b;
 770             xmlFreeDoc(xsp_doc);
 771             return b;
 772         }
 773     }
 774
 775     m_backend.reset();
 776
 777     BackendPtr b(new Backend(sptr));
 778
 779     b->xsp = xsp;
 780     b->m_frontend_database = database;
 781
 782     if (sptr->query_encoding.length())
 783         b->set_option("rpnCharset", sptr->query_encoding);
 784
 785     b->set_option("timeout", "40");
 786
 787     if (m_p->apdu_log)
 788         b->set_option("apdulog", "1");
 789
 790     if (sptr->piggyback)
 791         b->set_option("count", "1"); /* some SRU servers INSIST on getting
 792                                         maximumRecords > 0 */
 793     b->set_option("piggyback", sptr->piggyback ? "1" : "0");
 794
 795     std::string authentication = sptr->authentication;
 796     std::string proxy = sptr->cfProxy;
 797
 798     const char *param_user = 0;
 799     const char *param_password = 0;
 800     const char *param_proxy = 0;
 801     char *x_args = 0;  // all x-args to be passed to backend
 802
 803     if (db_args.length())
 804     {
 805
 806         char **names;
 807         char **values;
 808         int no_parms = yaz_uri_to_array(db_args.c_str(),
 809                                         odr, &names, &values);
 810         const char **x_names = (const char **)
 811             odr_malloc(odr, (1 + no_parms) * sizeof(*x_names));
 812         const char **x_values = (const char **)
 813             odr_malloc(odr, (1 + no_parms) * sizeof(*x_values));
 814         int no_x_names = 0;
 815         int i;
 816         for (i = 0; i < no_parms; i++)
 817         {
 818             const char *name = names[i];
 819             const char *value = values[i];
 820             assert(name);
 821             assert(value);
 822             if (!strcmp(name, "user"))
 823                 param_user = value;
 824             else if (!strcmp(name, "password"))
 825                 param_password = value;
 826             else if (!strcmp(name, "proxy"))
 827                 param_proxy = value;
 828             else if (!strcmp(name, "cproxysession"))
 829                 ;
 830             else if (name[0] == 'x' && name[1] == '-')
 831             {
 832                 x_names[no_x_names] = name;
 833                 x_values[no_x_names] = value;
 834                 no_x_names++;
 835             }
 836             else
 837             {
 838                 BackendPtr notfound;
 839                 char *msg = (char*) odr_malloc(odr, strlen(name) + 30);
 840                 *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 841                 sprintf(msg, "Bad database argument: %s", name);
 842                 *addinfo = msg;
 843                 return notfound;
 844             }
 845         }
 846         if (no_x_names)
 847         {
 848             x_names[no_x_names] = 0; // terminate list
 849             yaz_array_to_uri(&x_args, odr, (char **) x_names,
 850                              (char **) x_values);
 851         }
 852         if (param_user)
 853         {
 854             authentication = std::string(param_user);
 855             if (param_password)
 856                 authentication += "/" + std::string(param_password);
 857         }
 858         if (param_proxy)
 859             proxy = param_proxy;
 860     }
 861
 862     if (sptr->cfAuth.length())
 863     {
 864         // A CF target
 865         b->set_option("user", sptr->cfAuth);
 866         if (!param_user && !param_password && authentication.length())
 867         {
 868             if (db_args.length())
 869                 db_args += "&";
 870             // no database (auth) args specified already.. and the
 871             // Torus authentication has it.. Generate the args that CF
 872             // understands..
 873             size_t found = authentication.find('/');
 874             if (found != std::string::npos)
 875             {
 876                 db_args += "user=" +
 877                     mp::util::uri_encode(authentication.substr(0, found))
 878                     + "&password=" +
 879                     mp::util::uri_encode(authentication.substr(found+1));
 880             }
 881             else
 882                 db_args += "user=" + mp::util::uri_encode(authentication);
 883         }
 884         if (!param_proxy && proxy.length())
 885         {
 886             if (db_args.length())
 887                 db_args += "&";
 888             db_args += "proxy=" + mp::util::uri_encode(proxy);
 889         }
 890         if (sptr->cfSubDb.length())
 891         {
 892             if (db_args.length())
 893                 db_args += "&";
 894             db_args += "subdatabase=" + mp::util::uri_encode(sptr->cfSubDb);
 895         }
 896     }
 897     else
 898     {
 899         db_args.clear(); // Only x-args to be passed (non-CF)
 900         if (x_args)
 901             db_args = x_args;
 902
 903         size_t found = authentication.find('/');
 904
 905         if (sptr->sru.length() && found != std::string::npos)
 906         {
 907             b->set_option("user", authentication.substr(0, found));
 908             b->set_option("password", authentication.substr(found+1));
 909         }
 910         else
 911             b->set_option("user", authentication);
 912
 913         if (proxy.length())
 914             b->set_option("proxy", proxy);
 915     }
 916     if (b->sptr->contentConnector.length())
 917     {
 918         char *fname = (char *) xmalloc(m_p->content_tmp_file.length() + 8);
 919         strcpy(fname, m_p->content_tmp_file.c_str());
 920         char *xx = strstr(fname, "XXXXXX");
 921         if (!xx)
 922         {
 923             xx = fname + strlen(fname);
 924             strcat(fname, "XXXXXX");
 925         }
 926         char tmp_char = xx[6];
 927         sprintf(xx, "%06d", ((unsigned) rand()) % 1000000);
 928         xx[6] = tmp_char;
 929
 930         FILE *file = fopen(fname, "w");
 931         if (!file)
 932         {
 933             package.log("zoom", YLOG_WARN|YLOG_ERRNO, "create %s", fname);
 934             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 935             *addinfo = (char *)  odr_malloc(odr, 40 + strlen(fname));
 936             sprintf(*addinfo, "Could not create %s", fname);
 937             xfree(fname);
 938             BackendPtr backend_null;
 939             return backend_null;
 940         }
 941         b->content_session_id.assign(xx, 6);
 942         WRBUF w = wrbuf_alloc();
 943         wrbuf_puts(w, "#content_proxy\n");
 944         wrbuf_printf(w, "connector: %s\n", b->sptr->contentConnector.c_str());
 945         if (authentication.length())
 946             wrbuf_printf(w, "auth: %s\n", authentication.c_str());
 947         if (proxy.length())
 948             wrbuf_printf(w, "proxy: %s\n", proxy.c_str());
 949         if (sptr->cfProxy.length())
 950             wrbuf_printf(w, "cfproxy: %s\n", sptr->cfProxy.c_str());
 951
 952         fwrite(wrbuf_buf(w), 1, wrbuf_len(w), file);
 953         fclose(file);
 954         package.log("zoom", YLOG_LOG, "file %s created\n", fname);
 955         xfree(fname);
 956     }
 957
 958     std::string url;
 959     if (sptr->sru.length())
 960     {
 961         url = "http://" + sptr->target;
 962         b->set_option("sru", sptr->sru);
 963     }
 964     else
 965     {
 966         url = sptr->target;
 967     }
 968     if (db_args.length())
 969         url += "," + db_args;
 970     package.log("zoom", YLOG_LOG, "url=%s", url.c_str());
 971     b->connect(url, error, addinfo, odr);
 972     if (*error == 0)
 973     {
 974         m_backend = b;
 975     }
 976     return b;
 977 }
 978
 979 void yf::Zoom::Frontend::prepare_elements(BackendPtr b,
 980                                           Odr_oid *preferredRecordSyntax,
 981                                           const char *element_set_name,
 982                                           bool &enable_pz2_retrieval,
 983                                           bool &enable_pz2_transform,
 984                                           bool &assume_marc8_charset)
 985
 986 {
 987     char oid_name_str[OID_STR_MAX];
 988     const char *syntax_name = 0;
 989
 990     if (preferredRecordSyntax &&
 991         !oid_oidcmp(preferredRecordSyntax, yaz_oid_recsyn_xml)
 992         && element_set_name)
 993     {
 994         if (!strcmp(element_set_name, m_p->element_transform.c_str()))
 995         {
 996             enable_pz2_retrieval = true;
 997             enable_pz2_transform = true;
 998         }
 999         else if (!strcmp(element_set_name, m_p->element_raw.c_str()))
1000         {
1001             enable_pz2_retrieval = true;
1002         }
1003     }
1004
1005     if (enable_pz2_retrieval)
1006     {
1007         std::string configured_request_syntax = b->sptr->request_syntax;
1008         if (configured_request_syntax.length())
1009         {
1010             syntax_name = configured_request_syntax.c_str();
1011             const Odr_oid *syntax_oid =
1012                 yaz_string_to_oid(yaz_oid_std(), CLASS_RECSYN, syntax_name);
1013             if (!oid_oidcmp(syntax_oid, yaz_oid_recsyn_usmarc)
1014                 || !oid_oidcmp(syntax_oid, yaz_oid_recsyn_opac))
1015                 assume_marc8_charset = true;
1016         }
1017     }
1018     else if (preferredRecordSyntax)
1019         syntax_name =
1020             yaz_oid_to_string_buf(preferredRecordSyntax, 0, oid_name_str);
1021
1022     if (b->sptr->sru.length())
1023         syntax_name = "XML";
1024
1025     b->set_option("preferredRecordSyntax", syntax_name);
1026
1027     if (enable_pz2_retrieval)
1028     {
1029         element_set_name = 0;
1030         if (b->sptr->element_set.length())
1031             element_set_name = b->sptr->element_set.c_str();
1032     }
1033
1034     b->set_option("elementSetName", element_set_name);
1035     if (b->sptr->sru.length() && element_set_name)
1036         b->set_option("schema", element_set_name);
1037 }
1038
1039 Z_Records *yf::Zoom::Frontend::get_records(Odr_int start,
1040                                            Odr_int number_to_present,
1041                                            int *error,
1042                                            char **addinfo,
1043                                            Odr_int *number_of_records_returned,
1044                                            ODR odr,
1045                                            BackendPtr b,
1046                                            Odr_oid *preferredRecordSyntax,
1047                                            const char *element_set_name)
1048 {
1049     *number_of_records_returned = 0;
1050     Z_Records *records = 0;
1051     bool enable_pz2_retrieval = false; // whether target profile is used
1052     bool enable_pz2_transform = false; // whether XSLT is used as well
1053     bool assume_marc8_charset = false;
1054
1055     prepare_elements(b, preferredRecordSyntax,
1056                      element_set_name,
1057                      enable_pz2_retrieval,
1058                      enable_pz2_transform,
1059                      assume_marc8_charset);
1060
1061     if (start < 0 || number_to_present <=0)
1062         return records;
1063
1064     if (number_to_present > 10000)
1065         number_to_present = 10000;
1066
1067     ZOOM_record *recs = (ZOOM_record *)
1068         odr_malloc(odr, (size_t) number_to_present * sizeof(*recs));
1069
1070     b->present(start, number_to_present, recs, error, addinfo, odr);
1071
1072     int i = 0;
1073     if (!*error)
1074     {
1075         for (i = 0; i < number_to_present; i++)
1076             if (!recs[i])
1077                 break;
1078     }
1079     if (i > 0)
1080     {  // only return records if no error and at least one record
1081         char *odr_database = odr_strdup(odr,
1082                                         b->m_frontend_database.c_str());
1083         Z_NamePlusRecordList *npl = (Z_NamePlusRecordList *)
1084             odr_malloc(odr, sizeof(*npl));
1085         *number_of_records_returned = i;
1086         npl->num_records = i;
1087         npl->records = (Z_NamePlusRecord **)
1088             odr_malloc(odr, i * sizeof(*npl->records));
1089         for (i = 0; i < number_to_present; i++)
1090         {
1091             Z_NamePlusRecord *npr = 0;
1092             const char *addinfo;
1093             int sur_error = ZOOM_record_error(recs[i], 0 /* msg */,
1094                                               &addinfo, 0 /* diagset */);
1095
1096             if (sur_error)
1097             {
1098                 npr = zget_surrogateDiagRec(odr, odr_database, sur_error,
1099                                             addinfo);
1100             }
1101             else if (enable_pz2_retrieval)
1102             {
1103                 char rec_type_str[100];
1104                 const char *record_encoding = 0;
1105
1106                 if (b->sptr->record_encoding.length())
1107                     record_encoding = b->sptr->record_encoding.c_str();
1108                 else if (assume_marc8_charset)
1109                     record_encoding = "marc8";
1110
1111                 strcpy(rec_type_str, b->sptr->use_turbomarc ? "txml" : "xml");
1112                 if (record_encoding)
1113                 {
1114                     strcat(rec_type_str, "; charset=");
1115                     strcat(rec_type_str, record_encoding);
1116                 }
1117
1118                 int rec_len;
1119                 xmlChar *xmlrec_buf = 0;
1120                 const char *rec_buf = ZOOM_record_get(recs[i], rec_type_str,
1121                                                       &rec_len);
1122                 if (!rec_buf && !npr)
1123                 {
1124                     std::string addinfo("ZOOM_record_get failed for type ");
1125
1126                     addinfo += rec_type_str;
1127                     npr = zget_surrogateDiagRec(
1128                         odr, odr_database,
1129                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1130                         addinfo.c_str());
1131                 }
1132
1133                 if (rec_buf && b->xsp && enable_pz2_transform)
1134                 {
1135                     xmlDoc *rec_doc = xmlParseMemory(rec_buf, rec_len);
1136                     if (!rec_doc)
1137                     {
1138                         npr = zget_surrogateDiagRec(
1139                             odr, odr_database,
1140                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1141                             "xml parse failed for record");
1142                     }
1143                     else
1144                     {
1145                         xmlDoc *rec_res =
1146                             xsltApplyStylesheet(b->xsp, rec_doc, 0);
1147
1148                         if (rec_res)
1149                         {
1150                             xsltSaveResultToString(&xmlrec_buf, &rec_len,
1151                                                    rec_res, b->xsp);
1152                             rec_buf = (const char *) xmlrec_buf;
1153
1154                             xmlFreeDoc(rec_res);
1155                         }
1156                         if (!rec_buf)
1157                         {
1158                             std::string addinfo;
1159
1160                             addinfo = "xslt apply failed for "
1161                                 + b->sptr->transform_xsl_fname;
1162                             npr = zget_surrogateDiagRec(
1163                                 odr, odr_database,
1164                                 YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1165                                 addinfo.c_str());
1166                         }
1167                         xmlFreeDoc(rec_doc);
1168                     }
1169                 }
1170
1171                 if (rec_buf)
1172                 {
1173                     xmlDoc *doc = xmlParseMemory(rec_buf, rec_len);
1174                     std::string res =
1175                         mp::xml::url_recipe_handle(doc, b->sptr->urlRecipe);
1176                     if (res.length() && b->content_session_id.length())
1177                     {
1178                         size_t off = res.find_first_of("://");
1179                         if (off != std::string::npos)
1180                         {
1181                             char tmp[1024];
1182                             sprintf(tmp, "%s.%s/",
1183                                     b->content_session_id.c_str(),
1184                                     m_p->content_proxy_server.c_str());
1185                             res.insert(off + 3, tmp);
1186                         }
1187                     }
1188                     if (res.length())
1189                     {
1190                         xmlNode *ptr = xmlDocGetRootElement(doc);
1191                         while (ptr && ptr->type != XML_ELEMENT_NODE)
1192                             ptr = ptr->next;
1193                         xmlNode *c =
1194                             xmlNewChild(ptr, 0, BAD_CAST "metadata", 0);
1195                         xmlNewProp(c, BAD_CAST "type", BAD_CAST
1196                                    "generated-url");
1197                         xmlNode * t = xmlNewText(BAD_CAST res.c_str());
1198                         xmlAddChild(c, t);
1199
1200                         if (xmlrec_buf)
1201                             xmlFree(xmlrec_buf);
1202
1203                         xmlDocDumpMemory(doc, &xmlrec_buf, &rec_len);
1204                         rec_buf = (const char *) xmlrec_buf;
1205                     }
1206                     xmlFreeDoc(doc);
1207                 }
1208                 if (!npr)
1209                 {
1210                     if (!rec_buf)
1211                         npr = zget_surrogateDiagRec(
1212                             odr, odr_database,
1213                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1214                             rec_type_str);
1215                     else
1216                     {
1217                         npr = (Z_NamePlusRecord *)
1218                             odr_malloc(odr, sizeof(*npr));
1219                         npr->databaseName = odr_database;
1220                         npr->which = Z_NamePlusRecord_databaseRecord;
1221                         npr->u.databaseRecord =
1222                             z_ext_record_xml(odr, rec_buf, rec_len);
1223                     }
1224                 }
1225                 if (xmlrec_buf)
1226                     xmlFree(xmlrec_buf);
1227             }
1228             else
1229             {
1230                 Z_External *ext =
1231                     (Z_External *) ZOOM_record_get(recs[i], "ext", 0);
1232                 if (ext)
1233                 {
1234                     npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
1235                     npr->databaseName = odr_database;
1236                     npr->which = Z_NamePlusRecord_databaseRecord;
1237                     npr->u.databaseRecord = ext;
1238                 }
1239                 else
1240                 {
1241                     npr = zget_surrogateDiagRec(
1242                         odr, odr_database,
1243                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1244                         "ZOOM_record, type ext");
1245                 }
1246             }
1247             npl->records[i] = npr;
1248         }
1249         records = (Z_Records*) odr_malloc(odr, sizeof(*records));
1250         records->which = Z_Records_DBOSD;
1251         records->u.databaseOrSurDiagnostics = npl;
1252     }
1253     return records;
1254 }
1255
1256 struct cql_node *yf::Zoom::Impl::convert_cql_fields(struct cql_node *cn,
1257                                                     ODR odr)
1258 {
1259     struct cql_node *r = 0;
1260     if (!cn)
1261         return 0;
1262     switch (cn->which)
1263     {
1264     case CQL_NODE_ST:
1265         if (cn->u.st.index)
1266         {
1267             std::map<std::string,std::string>::const_iterator it;
1268             it = fieldmap.find(cn->u.st.index);
1269             if (it == fieldmap.end())
1270                 return cn;
1271             if (it->second.length())
1272                 cn->u.st.index = odr_strdup(odr, it->second.c_str());
1273             else
1274                 cn->u.st.index = 0;
1275         }
1276         break;
1277     case CQL_NODE_BOOL:
1278         r = convert_cql_fields(cn->u.boolean.left, odr);
1279         if (!r)
1280             r = convert_cql_fields(cn->u.boolean.right, odr);
1281         break;
1282     case CQL_NODE_SORT:
1283         r = convert_cql_fields(cn->u.sort.search, odr);
1284         break;
1285     }
1286     return r;
1287 }
1288
1289 void yf::Zoom::Frontend::handle_search(mp::Package &package)
1290 {
1291     Z_GDU *gdu = package.request().get();
1292     Z_APDU *apdu_req = gdu->u.z3950;
1293     Z_APDU *apdu_res = 0;
1294     mp::odr odr;
1295     Z_SearchRequest *sr = apdu_req->u.searchRequest;
1296     if (sr->num_databaseNames != 1)
1297     {
1298         apdu_res = odr.create_searchResponse(
1299             apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
1300         package.response() = apdu_res;
1301         return;
1302     }
1303
1304     int error = 0;
1305     char *addinfo = 0;
1306     std::string db(sr->databaseNames[0]);
1307     BackendPtr b = get_backend_from_databases(package, db, &error,
1308                                               &addinfo, odr);
1309     if (error)
1310     {
1311         apdu_res =
1312             odr.create_searchResponse(apdu_req, error, addinfo);
1313         package.response() = apdu_res;
1314         return;
1315     }
1316
1317     b->set_option("setname", "default");
1318
1319     bool enable_pz2_retrieval = false;
1320     bool enable_pz2_transform = false;
1321     bool assume_marc8_charset = false;
1322     prepare_elements(b, sr->preferredRecordSyntax, 0 /*element_set_name */,
1323                      enable_pz2_retrieval,
1324                      enable_pz2_transform,
1325                      assume_marc8_charset);
1326
1327     Odr_int hits = 0;
1328     Z_Query *query = sr->query;
1329     WRBUF ccl_wrbuf = 0;
1330     WRBUF pqf_wrbuf = 0;
1331     std::string sortkeys;
1332
1333     if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
1334     {
1335         // RPN
1336         pqf_wrbuf = wrbuf_alloc();
1337         yaz_rpnquery_to_wrbuf(pqf_wrbuf, query->u.type_1);
1338     }
1339     else if (query->which == Z_Query_type_2)
1340     {
1341         // CCL
1342         ccl_wrbuf = wrbuf_alloc();
1343         wrbuf_write(ccl_wrbuf, (const char *) query->u.type_2->buf,
1344                     query->u.type_2->len);
1345     }
1346     else if (query->which == Z_Query_type_104 &&
1347              query->u.type_104->which == Z_External_CQL)
1348     {
1349         // CQL
1350         const char *cql = query->u.type_104->u.cql;
1351         CQL_parser cp = cql_parser_create();
1352         int r = cql_parser_string(cp, cql);
1353         if (r)
1354         {
1355             cql_parser_destroy(cp);
1356             apdu_res =
1357                 odr.create_searchResponse(apdu_req,
1358                                           YAZ_BIB1_MALFORMED_QUERY,
1359                                           "CQL syntax error");
1360             package.response() = apdu_res;
1361             return;
1362         }
1363         struct cql_node *cn = cql_parser_result(cp);
1364         struct cql_node *cn_error = m_p->convert_cql_fields(cn, odr);
1365         if (cn_error)
1366         {
1367             // hopefully we are getting a ptr to a index+relation+term node
1368             addinfo = 0;
1369             if (cn_error->which == CQL_NODE_ST)
1370                 addinfo = cn_error->u.st.index;
1371
1372             apdu_res =
1373                 odr.create_searchResponse(apdu_req,
1374                                           YAZ_BIB1_UNSUPP_USE_ATTRIBUTE,
1375                                           addinfo);
1376             package.response() = apdu_res;
1377             return;
1378         }
1379         char ccl_buf[1024];
1380
1381         r = cql_to_ccl_buf(cn, ccl_buf, sizeof(ccl_buf));
1382         if (r == 0)
1383         {
1384             ccl_wrbuf = wrbuf_alloc();
1385             wrbuf_puts(ccl_wrbuf, ccl_buf);
1386
1387             WRBUF sru_sortkeys_wrbuf = wrbuf_alloc();
1388
1389             cql_sortby_to_sortkeys(cn, wrbuf_vp_puts, sru_sortkeys_wrbuf);
1390             WRBUF sort_spec_wrbuf = wrbuf_alloc();
1391             yaz_srw_sortkeys_to_sort_spec(wrbuf_cstr(sru_sortkeys_wrbuf),
1392                                           sort_spec_wrbuf);
1393             wrbuf_destroy(sru_sortkeys_wrbuf);
1394
1395             yaz_tok_cfg_t tc = yaz_tok_cfg_create();
1396             yaz_tok_parse_t tp =
1397                 yaz_tok_parse_buf(tc, wrbuf_cstr(sort_spec_wrbuf));
1398             yaz_tok_cfg_destroy(tc);
1399
1400             /* go through sortspec and map fields */
1401             int token = yaz_tok_move(tp);
1402             while (token != YAZ_TOK_EOF)
1403             {
1404                 if (token == YAZ_TOK_STRING)
1405                 {
1406                     const char *field = yaz_tok_parse_string(tp);
1407                     std::map<std::string,std::string>::iterator it;
1408                     it = b->sptr->sortmap.find(field);
1409                     if (it != b->sptr->sortmap.end())
1410                         sortkeys += it->second;
1411                     else
1412                         sortkeys += field;
1413                 }
1414                 sortkeys += " ";
1415                 token = yaz_tok_move(tp);
1416                 if (token == YAZ_TOK_STRING)
1417                 {
1418                     sortkeys += yaz_tok_parse_string(tp);
1419                 }
1420                 if (token != YAZ_TOK_EOF)
1421                 {
1422                     sortkeys += " ";
1423                     token = yaz_tok_move(tp);
1424                 }
1425             }
1426             yaz_tok_parse_destroy(tp);
1427             wrbuf_destroy(sort_spec_wrbuf);
1428         }
1429         cql_parser_destroy(cp);
1430         if (r)
1431         {
1432             apdu_res =
1433                 odr.create_searchResponse(apdu_req,
1434                                           YAZ_BIB1_MALFORMED_QUERY,
1435                                           "CQL to CCL conversion error");
1436             package.response() = apdu_res;
1437             return;
1438         }
1439     }
1440     else
1441     {
1442         apdu_res =
1443             odr.create_searchResponse(apdu_req, YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
1444         package.response() = apdu_res;
1445         return;
1446     }
1447
1448     if (ccl_wrbuf)
1449     {
1450         // CCL to PQF
1451         assert(pqf_wrbuf == 0);
1452         int cerror, cpos;
1453         struct ccl_rpn_node *cn;
1454         package.log("zoom", YLOG_LOG, "CCL: %s", wrbuf_cstr(ccl_wrbuf));
1455         cn = ccl_find_str(b->sptr->ccl_bibset, wrbuf_cstr(ccl_wrbuf),
1456                           &cerror, &cpos);
1457         wrbuf_destroy(ccl_wrbuf);
1458         if (!cn)
1459         {
1460             char *addinfo = odr_strdup(odr, ccl_err_msg(cerror));
1461             int z3950_diag = YAZ_BIB1_MALFORMED_QUERY;
1462
1463             switch (cerror)
1464             {
1465             case CCL_ERR_UNKNOWN_QUAL:
1466                 z3950_diag = YAZ_BIB1_UNSUPP_USE_ATTRIBUTE;
1467                 break;
1468             case CCL_ERR_TRUNC_NOT_LEFT:
1469             case CCL_ERR_TRUNC_NOT_RIGHT:
1470             case CCL_ERR_TRUNC_NOT_BOTH:
1471                 z3950_diag = YAZ_BIB1_UNSUPP_TRUNCATION_ATTRIBUTE;
1472                 break;
1473             }
1474             apdu_res =
1475                 odr.create_searchResponse(apdu_req, z3950_diag, addinfo);
1476             package.response() = apdu_res;
1477             return;
1478         }
1479         pqf_wrbuf = wrbuf_alloc();
1480         ccl_pquery(pqf_wrbuf, cn);
1481         package.log("zoom", YLOG_LOG, "RPN: %s", wrbuf_cstr(pqf_wrbuf));
1482         ccl_rpn_delete(cn);
1483     }
1484
1485     assert(pqf_wrbuf);
1486
1487     ZOOM_query q = ZOOM_query_create();
1488     ZOOM_query_sortby2(q, b->sptr->sortStrategy.c_str(), sortkeys.c_str());
1489
1490     if (b->get_option("sru"))
1491     {
1492         int status = 0;
1493         Z_RPNQuery *zquery;
1494         zquery = p_query_rpn(odr, wrbuf_cstr(pqf_wrbuf));
1495         WRBUF wrb = wrbuf_alloc();
1496
1497         if (!strcmp(b->get_option("sru"), "solr"))
1498         {
1499             solr_transform_t cqlt = solr_transform_create();
1500
1501             status = solr_transform_rpn2solr_wrbuf(cqlt, wrb, zquery);
1502
1503             solr_transform_close(cqlt);
1504         }
1505         else
1506         {
1507             cql_transform_t cqlt = cql_transform_create();
1508
1509             status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery);
1510
1511             cql_transform_close(cqlt);
1512         }
1513         if (status == 0)
1514         {
1515             ZOOM_query_cql(q, wrbuf_cstr(wrb));
1516             package.log("zoom", YLOG_LOG, "CQL: %s", wrbuf_cstr(wrb));
1517             b->search(q, &hits, &error, &addinfo, odr);
1518         }
1519         ZOOM_query_destroy(q);
1520
1521         wrbuf_destroy(wrb);
1522         wrbuf_destroy(pqf_wrbuf);
1523         if (status)
1524         {
1525             apdu_res =
1526                 odr.create_searchResponse(apdu_req, YAZ_BIB1_MALFORMED_QUERY,
1527                                           "can not convert from RPN to CQL/SOLR");
1528             package.response() = apdu_res;
1529             return;
1530         }
1531     }
1532     else
1533     {
1534         ZOOM_query_prefix(q, wrbuf_cstr(pqf_wrbuf));
1535         package.log("zoom", YLOG_LOG, "search PQF: %s", wrbuf_cstr(pqf_wrbuf));
1536         b->search(q, &hits, &error, &addinfo, odr);
1537         ZOOM_query_destroy(q);
1538         wrbuf_destroy(pqf_wrbuf);
1539     }
1540
1541     const char *element_set_name = 0;
1542     Odr_int number_to_present = 0;
1543     if (!error)
1544         mp::util::piggyback_sr(sr, hits, number_to_present, &element_set_name);
1545
1546     Odr_int number_of_records_returned = 0;
1547     Z_Records *records = get_records(
1548         0, number_to_present, &error, &addinfo,
1549         &number_of_records_returned, odr, b, sr->preferredRecordSyntax,
1550         element_set_name);
1551     apdu_res = odr.create_searchResponse(apdu_req, error, addinfo);
1552     if (records)
1553     {
1554         apdu_res->u.searchResponse->records = records;
1555         apdu_res->u.searchResponse->numberOfRecordsReturned =
1556             odr_intdup(odr, number_of_records_returned);
1557     }
1558     apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
1559     package.response() = apdu_res;
1560 }
1561
1562 void yf::Zoom::Frontend::handle_present(mp::Package &package)
1563 {
1564     Z_GDU *gdu = package.request().get();
1565     Z_APDU *apdu_req = gdu->u.z3950;
1566     Z_APDU *apdu_res = 0;
1567     Z_PresentRequest *pr = apdu_req->u.presentRequest;
1568
1569     mp::odr odr;
1570     if (!m_backend)
1571     {
1572         package.response() = odr.create_presentResponse(
1573             apdu_req, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST, 0);
1574         return;
1575     }
1576     const char *element_set_name = 0;
1577     Z_RecordComposition *comp = pr->recordComposition;
1578     if (comp && comp->which != Z_RecordComp_simple)
1579     {
1580         package.response() = odr.create_presentResponse(
1581             apdu_req,
1582             YAZ_BIB1_PRESENT_COMP_SPEC_PARAMETER_UNSUPP, 0);
1583         return;
1584     }
1585     if (comp && comp->u.simple->which == Z_ElementSetNames_generic)
1586         element_set_name = comp->u.simple->u.generic;
1587     Odr_int number_of_records_returned = 0;
1588     int error = 0;
1589     char *addinfo = 0;
1590     Z_Records *records = get_records(
1591         *pr->resultSetStartPoint - 1, *pr->numberOfRecordsRequested,
1592         &error, &addinfo, &number_of_records_returned, odr, m_backend,
1593         pr->preferredRecordSyntax, element_set_name);
1594
1595     apdu_res = odr.create_presentResponse(apdu_req, error, addinfo);
1596     if (records)
1597     {
1598         apdu_res->u.presentResponse->records = records;
1599         apdu_res->u.presentResponse->numberOfRecordsReturned =
1600             odr_intdup(odr, number_of_records_returned);
1601     }
1602     package.response() = apdu_res;
1603 }
1604
1605 void yf::Zoom::Frontend::handle_package(mp::Package &package)
1606 {
1607     Z_GDU *gdu = package.request().get();
1608     if (!gdu)
1609         ;
1610     else if (gdu->which == Z_GDU_Z3950)
1611     {
1612         Z_APDU *apdu_req = gdu->u.z3950;
1613         if (apdu_req->which == Z_APDU_initRequest)
1614         {
1615             mp::odr odr;
1616             package.response() = odr.create_close(
1617                 apdu_req,
1618                 Z_Close_protocolError,
1619                 "double init");
1620         }
1621         else if (apdu_req->which == Z_APDU_searchRequest)
1622         {
1623             handle_search(package);
1624         }
1625         else if (apdu_req->which == Z_APDU_presentRequest)
1626         {
1627             handle_present(package);
1628         }
1629         else
1630         {
1631             mp::odr odr;
1632             package.response() = odr.create_close(
1633                 apdu_req,
1634                 Z_Close_protocolError,
1635                 "zoom filter cannot handle this APDU");
1636             package.session().close();
1637         }
1638     }
1639     else
1640     {
1641         package.session().close();
1642     }
1643 }
1644
1645 void yf::Zoom::Impl::process(mp::Package &package)
1646 {
1647     FrontendPtr f = get_frontend(package);
1648     Z_GDU *gdu = package.request().get();
1649
1650     if (f->m_is_virtual)
1651     {
1652         f->handle_package(package);
1653     }
1654     else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1655              Z_APDU_initRequest)
1656     {
1657         Z_InitRequest *req = gdu->u.z3950->u.initRequest;
1658         f->m_init_gdu = gdu;
1659
1660         mp::odr odr;
1661         Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
1662         Z_InitResponse *resp = apdu->u.initResponse;
1663
1664         int i;
1665         static const int masks[] = {
1666             Z_Options_search,
1667             Z_Options_present,
1668             -1
1669         };
1670         for (i = 0; masks[i] != -1; i++)
1671             if (ODR_MASK_GET(req->options, masks[i]))
1672                 ODR_MASK_SET(resp->options, masks[i]);
1673
1674         static const int versions[] = {
1675             Z_ProtocolVersion_1,
1676             Z_ProtocolVersion_2,
1677             Z_ProtocolVersion_3,
1678             -1
1679         };
1680         for (i = 0; versions[i] != -1; i++)
1681             if (ODR_MASK_GET(req->protocolVersion, versions[i]))
1682                 ODR_MASK_SET(resp->protocolVersion, versions[i]);
1683             else
1684                 break;
1685
1686         *resp->preferredMessageSize = *req->preferredMessageSize;
1687         *resp->maximumRecordSize = *req->maximumRecordSize;
1688
1689         package.response() = apdu;
1690         f->m_is_virtual = true;
1691     }
1692     else
1693         package.move();
1694
1695     release_frontend(package);
1696 }
1697
1698
1699 static mp::filter::Base* filter_creator()
1700 {
1701     return new mp::filter::Zoom;
1702 }
1703
1704 extern "C" {
1705     struct metaproxy_1_filter_struct metaproxy_1_filter_zoom = {
1706         0,
1707         "zoom",
1708         filter_creator
1709     };
1710 }
1711
1712
1713 /*
1714  * Local variables:
1715  * c-basic-offset: 4
1716  * c-file-style: "Stroustrup"
1717  * indent-tabs-mode: nil
1718  * End:
1719  * vim: shiftwidth=4 tabstop=8 expandtab
1720  */
1721