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 #include "filter_zoom.hpp"
  21 #include <yaz/zoom.h>
  22 #include <yaz/yaz-version.h>
  23 #include <yaz/tpath.h>
  24 #include <yaz/srw.h>
  25 #include <metaproxy/package.hpp>
  26 #include <metaproxy/util.hpp>
  27 #include <metaproxy/xmlutil.hpp>
  28 #include "torus.hpp"
  29
  30 #include <libxslt/xsltutils.h>
  31 #include <libxslt/transform.h>
  32
  33 #include <boost/thread/mutex.hpp>
  34 #include <boost/thread/condition.hpp>
  35 #include <yaz/ccl_xml.h>
  36 #include <yaz/ccl.h>
  37 #include <yaz/rpn2cql.h>
  38 #include <yaz/rpn2solr.h>
  39 #include <yaz/pquery.h>
  40 #include <yaz/cql.h>
  41 #include <yaz/oid_db.h>
  42 #include <yaz/diagbib1.h>
  43 #include <yaz/log.h>
  44 #include <yaz/zgdu.h>
  45 #include <yaz/querytowrbuf.h>
  46
  47 namespace mp = metaproxy_1;
  48 namespace yf = mp::filter;
  49
  50 namespace metaproxy_1 {
  51     namespace filter {
  52         struct Zoom::Searchable : boost::noncopyable {
  53             std::string authentication;
  54             std::string cfAuth;
  55             std::string cfProxy;
  56             std::string cfSubDb;
  57             std::string udb;
  58             std::string target;
  59             std::string query_encoding;
  60             std::string sru;
  61             std::string request_syntax;
  62             std::string element_set;
  63             std::string record_encoding;
  64             std::string transform_xsl_fname;
  65             std::string urlRecipe;
  66             std::string contentConnector;
  67             bool use_turbomarc;
  68             bool piggyback;
  69             CCL_bibset ccl_bibset;
  70             Searchable(CCL_bibset base);
  71             ~Searchable();
  72         };
  73         class Zoom::Backend : boost::noncopyable {
  74             friend class Impl;
  75             friend class Frontend;
  76             std::string zurl;
  77             ZOOM_connection m_connection;
  78             ZOOM_resultset m_resultset;
  79             std::string m_frontend_database;
  80             SearchablePtr sptr;
  81             xsltStylesheetPtr xsp;
  82             std::string content_session_id;
  83         public:
  84             Backend(SearchablePtr sptr);
  85             ~Backend();
  86             void connect(std::string zurl, int *error, char **addinfo,
  87                          ODR odr);
  88             void search_pqf(const char *pqf, Odr_int *hits,
  89                             int *error, char **addinfo, ODR odr);
  90             void search_cql(const char *cql, Odr_int *hits,
  91                             int *error, char **addinfo, ODR odr);
  92             void present(Odr_int start, Odr_int number, ZOOM_record *recs,
  93                          int *error, char **addinfo, ODR odr);
  94             void set_option(const char *name, const char *value);
  95             void set_option(const char *name, std::string value);
  96             const char *get_option(const char *name);
  97             void get_zoom_error(int *error, char **addinfo, ODR odr);
  98         };
  99         class Zoom::Frontend : boost::noncopyable {
 100             friend class Impl;
 101             Impl *m_p;
 102             bool m_is_virtual;
 103             bool m_in_use;
 104             yazpp_1::GDU m_init_gdu;
 105             BackendPtr m_backend;
 106             void handle_package(mp::Package &package);
 107             void handle_search(mp::Package &package);
 108             void handle_present(mp::Package &package);
 109             BackendPtr get_backend_from_databases(std::string &database,
 110                                                   int *error,
 111                                                   char **addinfo,
 112                                                   ODR odr);
 113             Z_Records *get_records(Odr_int start,
 114                                    Odr_int number_to_present,
 115                                    int *error,
 116                                    char **addinfo,
 117                                    Odr_int *number_of_records_returned,
 118                                    ODR odr, BackendPtr b,
 119                                    Odr_oid *preferredRecordSyntax,
 120                                    const char *element_set_name);
 121         public:
 122             Frontend(Impl *impl);
 123             ~Frontend();
 124         };
 125         class Zoom::Impl {
 126             friend class Frontend;
 127         public:
 128             Impl();
 129             ~Impl();
 130             void process(metaproxy_1::Package & package);
 131             void configure(const xmlNode * ptr, bool test_only,
 132                            const char *path);
 133         private:
 134             void configure_local_records(const xmlNode * ptr, bool test_only);
 135             FrontendPtr get_frontend(mp::Package &package);
 136             void release_frontend(mp::Package &package);
 137             SearchablePtr parse_torus_record(const xmlNode *ptr);
 138             struct cql_node *convert_cql_fields(struct cql_node *cn, ODR odr);
 139             std::map<mp::Session, FrontendPtr> m_clients;
 140             boost::mutex m_mutex;
 141             boost::condition m_cond_session_ready;
 142             std::string torus_url;
 143             std::map<std::string,std::string> fieldmap;
 144             std::string xsldir;
 145             std::string file_path;
 146             std::string content_proxy_server;
 147             std::string content_tmp_file;
 148             CCL_bibset bibset;
 149             std::string element_transform;
 150             std::string element_raw;
 151             std::map<std::string,SearchablePtr> s_map;
 152         };
 153     }
 154 }
 155
 156 // define Pimpl wrapper forwarding to Impl
 157
 158 yf::Zoom::Zoom() : m_p(new Impl)
 159 {
 160 }
 161
 162 yf::Zoom::~Zoom()
 163 {  // must have a destructor because of boost::scoped_ptr
 164 }
 165
 166 void yf::Zoom::configure(const xmlNode *xmlnode, bool test_only,
 167                          const char *path)
 168 {
 169     m_p->configure(xmlnode, test_only, path);
 170 }
 171
 172 void yf::Zoom::process(mp::Package &package) const
 173 {
 174     m_p->process(package);
 175 }
 176
 177
 178 // define Implementation stuff
 179
 180 yf::Zoom::Backend::Backend(SearchablePtr ptr) : sptr(ptr)
 181 {
 182     m_connection = ZOOM_connection_create(0);
 183     m_resultset = 0;
 184     xsp = 0;
 185 }
 186
 187 yf::Zoom::Backend::~Backend()
 188 {
 189     if (xsp)
 190         xsltFreeStylesheet(xsp);
 191     ZOOM_connection_destroy(m_connection);
 192     ZOOM_resultset_destroy(m_resultset);
 193 }
 194
 195
 196 void yf::Zoom::Backend::get_zoom_error(int *error, char **addinfo,
 197                                        ODR odr)
 198 {
 199     const char *msg = 0;
 200     const char *zoom_addinfo = 0;
 201     const char *dset = 0;
 202     *error = ZOOM_connection_error_x(m_connection, &msg, &zoom_addinfo, &dset);
 203     if (*error)
 204     {
 205         if (*error >= ZOOM_ERROR_CONNECT)
 206         {
 207             // turn ZOOM diagnostic into a Bib-1 2: with addinfo=zoom err msg
 208             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 209             *addinfo = (char *) odr_malloc(
 210                 odr, 20 + strlen(msg) +
 211                 (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 212             strcpy(*addinfo, msg);
 213             if (zoom_addinfo)
 214             {
 215                 strcat(*addinfo, ": ");
 216                 strcat(*addinfo, zoom_addinfo);
 217                 strcat(*addinfo, " ");
 218             }
 219         }
 220         else
 221         {
 222             if (dset && !strcmp(dset, "info:srw/diagnostic/1"))
 223                 *error = yaz_diag_srw_to_bib1(*error);
 224             *addinfo = (char *) odr_malloc(
 225                 odr, 20 + (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 226             **addinfo = '\0';
 227             if (zoom_addinfo && *zoom_addinfo)
 228             {
 229                 strcpy(*addinfo, zoom_addinfo);
 230                 strcat(*addinfo, " ");
 231             }
 232             strcat(*addinfo, "(backend)");
 233         }
 234     }
 235 }
 236
 237 void yf::Zoom::Backend::connect(std::string zurl,
 238                                 int *error, char **addinfo,
 239                                 ODR odr)
 240 {
 241     ZOOM_connection_connect(m_connection, zurl.c_str(), 0);
 242     get_zoom_error(error, addinfo, odr);
 243 }
 244
 245 void yf::Zoom::Backend::search_pqf(const char *pqf, Odr_int *hits,
 246                                    int *error, char **addinfo, ODR odr)
 247 {
 248     m_resultset = ZOOM_connection_search_pqf(m_connection, pqf);
 249     get_zoom_error(error, addinfo, odr);
 250     if (*error == 0)
 251         *hits = ZOOM_resultset_size(m_resultset);
 252     else
 253         *hits = 0;
 254 }
 255
 256 void yf::Zoom::Backend::search_cql(const char *cql, Odr_int *hits,
 257                                    int *error, char **addinfo, ODR odr)
 258 {
 259     ZOOM_query q = ZOOM_query_create();
 260
 261     ZOOM_query_cql(q, cql);
 262
 263     m_resultset = ZOOM_connection_search(m_connection, q);
 264     ZOOM_query_destroy(q);
 265     get_zoom_error(error, addinfo, odr);
 266     if (*error == 0)
 267         *hits = ZOOM_resultset_size(m_resultset);
 268     else
 269         *hits = 0;
 270 }
 271
 272 void yf::Zoom::Backend::present(Odr_int start, Odr_int number,
 273                                 ZOOM_record *recs,
 274                                 int *error, char **addinfo, ODR odr)
 275 {
 276     ZOOM_resultset_records(m_resultset, recs, start, number);
 277     get_zoom_error(error, addinfo, odr);
 278 }
 279
 280 void yf::Zoom::Backend::set_option(const char *name, const char *value)
 281 {
 282     ZOOM_connection_option_set(m_connection, name, value);
 283     if (m_resultset)
 284         ZOOM_resultset_option_set(m_resultset, name, value);
 285 }
 286
 287 void yf::Zoom::Backend::set_option(const char *name, std::string value)
 288 {
 289     set_option(name, value.c_str());
 290 }
 291
 292 const char *yf::Zoom::Backend::get_option(const char *name)
 293 {
 294     return ZOOM_connection_option_get(m_connection, name);
 295 }
 296
 297 yf::Zoom::Searchable::Searchable(CCL_bibset base)
 298 {
 299     piggyback = true;
 300     use_turbomarc = true;
 301     ccl_bibset = ccl_qual_dup(base);
 302 }
 303
 304 yf::Zoom::Searchable::~Searchable()
 305 {
 306     ccl_qual_rm(&ccl_bibset);
 307 }
 308
 309 yf::Zoom::Frontend::Frontend(Impl *impl) :
 310     m_p(impl), m_is_virtual(false), m_in_use(true)
 311 {
 312 }
 313
 314 yf::Zoom::Frontend::~Frontend()
 315 {
 316 }
 317
 318 yf::Zoom::FrontendPtr yf::Zoom::Impl::get_frontend(mp::Package &package)
 319 {
 320     boost::mutex::scoped_lock lock(m_mutex);
 321
 322     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 323
 324     while(true)
 325     {
 326         it = m_clients.find(package.session());
 327         if (it == m_clients.end())
 328             break;
 329
 330         if (!it->second->m_in_use)
 331         {
 332             it->second->m_in_use = true;
 333             return it->second;
 334         }
 335         m_cond_session_ready.wait(lock);
 336     }
 337     FrontendPtr f(new Frontend(this));
 338     m_clients[package.session()] = f;
 339     f->m_in_use = true;
 340     return f;
 341 }
 342
 343 void yf::Zoom::Impl::release_frontend(mp::Package &package)
 344 {
 345     boost::mutex::scoped_lock lock(m_mutex);
 346     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 347
 348     it = m_clients.find(package.session());
 349     if (it != m_clients.end())
 350     {
 351         if (package.session().is_closed())
 352         {
 353             m_clients.erase(it);
 354         }
 355         else
 356         {
 357             it->second->m_in_use = false;
 358         }
 359         m_cond_session_ready.notify_all();
 360     }
 361 }
 362
 363 yf::Zoom::Impl::Impl() : element_transform("pz2") , element_raw("raw")
 364 {
 365     bibset = ccl_qual_mk();
 366 }
 367
 368 yf::Zoom::Impl::~Impl()
 369 {
 370     ccl_qual_rm(&bibset);
 371 }
 372
 373 yf::Zoom::SearchablePtr yf::Zoom::Impl::parse_torus_record(const xmlNode *ptr)
 374 {
 375     Zoom::SearchablePtr s(new Searchable(bibset));
 376
 377     for (ptr = ptr->children; ptr; ptr = ptr->next)
 378     {
 379         if (ptr->type != XML_ELEMENT_NODE)
 380             continue;
 381         if (!strcmp((const char *) ptr->name, "layer"))
 382             ptr = ptr->children;
 383         else if (!strcmp((const char *) ptr->name,
 384                          "authentication"))
 385         {
 386             s->authentication = mp::xml::get_text(ptr);
 387         }
 388         else if (!strcmp((const char *) ptr->name,
 389                          "cfAuth"))
 390         {
 391             s->cfAuth = mp::xml::get_text(ptr);
 392         }
 393         else if (!strcmp((const char *) ptr->name,
 394                          "cfProxy"))
 395         {
 396             s->cfProxy = mp::xml::get_text(ptr);
 397         }
 398         else if (!strcmp((const char *) ptr->name,
 399                          "cfSubDb"))
 400         {
 401             s->cfSubDb = mp::xml::get_text(ptr);
 402         }
 403         else if (!strcmp((const char *) ptr->name,
 404                          "contentConnector"))
 405         {
 406             s->contentConnector = mp::xml::get_text(ptr);
 407         }
 408         else if (!strcmp((const char *) ptr->name, "udb"))
 409         {
 410             s->udb = mp::xml::get_text(ptr);
 411         }
 412         else if (!strcmp((const char *) ptr->name, "zurl"))
 413         {
 414             s->target = mp::xml::get_text(ptr);
 415         }
 416         else if (!strcmp((const char *) ptr->name, "sru"))
 417         {
 418             s->sru = mp::xml::get_text(ptr);
 419         }
 420         else if (!strcmp((const char *) ptr->name,
 421                          "queryEncoding"))
 422         {
 423             s->query_encoding = mp::xml::get_text(ptr);
 424         }
 425         else if (!strcmp((const char *) ptr->name,
 426                          "piggyback"))
 427         {
 428             s->piggyback = mp::xml::get_bool(ptr, true);
 429         }
 430         else if (!strcmp((const char *) ptr->name,
 431                          "requestSyntax"))
 432         {
 433             s->request_syntax = mp::xml::get_text(ptr);
 434         }
 435         else if (!strcmp((const char *) ptr->name,
 436                          "elementSet"))
 437         {
 438             s->element_set = mp::xml::get_text(ptr);
 439         }
 440         else if (!strcmp((const char *) ptr->name,
 441                          "recordEncoding"))
 442         {
 443             s->record_encoding = mp::xml::get_text(ptr);
 444         }
 445         else if (!strcmp((const char *) ptr->name,
 446                          "transform"))
 447         {
 448             s->transform_xsl_fname = mp::xml::get_text(ptr);
 449         }
 450         else if (!strcmp((const char *) ptr->name,
 451                          "urlRecipe"))
 452         {
 453             s->urlRecipe = mp::xml::get_text(ptr);
 454         }
 455         else if (!strcmp((const char *) ptr->name,
 456                          "useTurboMarc"))
 457         {
 458             ; // useTurboMarc is ignored
 459         }
 460         else if (!strncmp((const char *) ptr->name,
 461                           "cclmap_", 7))
 462         {
 463             std::string value = mp::xml::get_text(ptr);
 464             ccl_qual_fitem(s->ccl_bibset, value.c_str(),
 465                            (const char *) ptr->name + 7);
 466         }
 467     }
 468     return s;
 469 }
 470
 471 void yf::Zoom::Impl::configure_local_records(const xmlNode *ptr, bool test_only)
 472 {
 473     while (ptr && ptr->type != XML_ELEMENT_NODE)
 474         ptr = ptr->next;
 475
 476     if (ptr)
 477     {
 478         if (!strcmp((const char *) ptr->name, "records"))
 479         {
 480             for (ptr = ptr->children; ptr; ptr = ptr->next)
 481             {
 482                 if (ptr->type != XML_ELEMENT_NODE)
 483                     continue;
 484                 if (!strcmp((const char *) ptr->name, "record"))
 485                 {
 486                     SearchablePtr s = parse_torus_record(ptr);
 487                     if (s)
 488                     {
 489                         std::string udb = s->udb;
 490                         if (udb.length())
 491                             s_map[s->udb] = s;
 492                         else
 493                         {
 494                             throw mp::filter::FilterException
 495                                 ("No udb for local torus record");
 496                         }
 497                     }
 498                 }
 499                 else
 500                 {
 501                     throw mp::filter::FilterException
 502                         ("Bad element "
 503                          + std::string((const char *) ptr->name)
 504                          + " in zoom filter inside element "
 505                          "<torus><records>");
 506                 }
 507             }
 508         }
 509         else
 510         {
 511             throw mp::filter::FilterException
 512                 ("Bad element "
 513                  + std::string((const char *) ptr->name)
 514                  + " in zoom filter inside element <torus>");
 515         }
 516     }
 517 }
 518
 519 void yf::Zoom::Impl::configure(const xmlNode *ptr, bool test_only,
 520                                const char *path)
 521 {
 522     content_tmp_file = "/tmp/mp_content_proxy.";
 523     if (path && *path)
 524     {
 525         file_path = path;
 526     }
 527     for (ptr = ptr->children; ptr; ptr = ptr->next)
 528     {
 529         if (ptr->type != XML_ELEMENT_NODE)
 530             continue;
 531         else if (!strcmp((const char *) ptr->name, "torus"))
 532         {
 533             const struct _xmlAttr *attr;
 534             for (attr = ptr->properties; attr; attr = attr->next)
 535             {
 536                 if (!strcmp((const char *) attr->name, "url"))
 537                     torus_url = mp::xml::get_text(attr->children);
 538                 else if (!strcmp((const char *) attr->name, "xsldir"))
 539                     xsldir = mp::xml::get_text(attr->children);
 540                 else if (!strcmp((const char *) attr->name, "element_transform"))
 541                     element_transform = mp::xml::get_text(attr->children);
 542                 else if (!strcmp((const char *) attr->name, "element_raw"))
 543                     element_raw = mp::xml::get_text(attr->children);
 544                 else
 545                     throw mp::filter::FilterException(
 546                         "Bad attribute " + std::string((const char *)
 547                                                        attr->name));
 548             }
 549             configure_local_records(ptr->children, test_only);
 550         }
 551         else if (!strcmp((const char *) ptr->name, "cclmap"))
 552         {
 553             const char *addinfo = 0;
 554             ccl_xml_config(bibset, ptr, &addinfo);
 555         }
 556         else if (!strcmp((const char *) ptr->name, "fieldmap"))
 557         {
 558             const struct _xmlAttr *attr;
 559             std::string ccl_field;
 560             std::string cql_field;
 561             for (attr = ptr->properties; attr; attr = attr->next)
 562             {
 563                 if (!strcmp((const char *) attr->name, "ccl"))
 564                     ccl_field = mp::xml::get_text(attr->children);
 565                 else if (!strcmp((const char *) attr->name, "cql"))
 566                     cql_field = mp::xml::get_text(attr->children);
 567                 else
 568                     throw mp::filter::FilterException(
 569                         "Bad attribute " + std::string((const char *)
 570                                                        attr->name));
 571             }
 572             if (cql_field.length())
 573                 fieldmap[cql_field] = ccl_field;
 574         }
 575         else if (!strcmp((const char *) ptr->name, "contentProxy"))
 576         {
 577             const struct _xmlAttr *attr;
 578             for (attr = ptr->properties; attr; attr = attr->next)
 579             {
 580                 if (!strcmp((const char *) attr->name, "server"))
 581                     content_proxy_server = mp::xml::get_text(attr->children);
 582                 else if (!strcmp((const char *) attr->name, "tmp_file"))
 583                     content_tmp_file = mp::xml::get_text(attr->children);
 584                 else
 585                     throw mp::filter::FilterException(
 586                         "Bad attribute " + std::string((const char *)
 587                                                        attr->name));
 588             }
 589         }
 590         else
 591         {
 592             throw mp::filter::FilterException
 593                 ("Bad element "
 594                  + std::string((const char *) ptr->name)
 595                  + " in zoom filter");
 596         }
 597     }
 598 }
 599
 600 yf::Zoom::BackendPtr yf::Zoom::Frontend::get_backend_from_databases(
 601     std::string &database, int *error, char **addinfo, ODR odr)
 602 {
 603     std::list<BackendPtr>::const_iterator map_it;
 604     if (m_backend && m_backend->m_frontend_database == database)
 605         return m_backend;
 606
 607     std::string db_args;
 608     std::string torus_db;
 609     size_t db_arg_pos = database.find(',');
 610     if (db_arg_pos != std::string::npos)
 611     {
 612         torus_db = database.substr(0, db_arg_pos);
 613         db_args = database.substr(db_arg_pos + 1);
 614     }
 615     else
 616         torus_db = database;
 617
 618     SearchablePtr sptr;
 619
 620     std::map<std::string,SearchablePtr>::iterator it;
 621     it = m_p->s_map.find(torus_db);
 622     if (it != m_p->s_map.end())
 623         sptr = it->second;
 624     else
 625     {
 626         xmlDoc *doc = mp::get_searchable(m_p->torus_url, torus_db);
 627         if (!doc)
 628         {
 629             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 630             *addinfo = odr_strdup(odr, database.c_str());
 631             BackendPtr b;
 632             return b;
 633         }
 634         const xmlNode *ptr = xmlDocGetRootElement(doc);
 635         if (ptr)
 636         {   // presumably ptr is a records element node
 637             // parse first record in document
 638             for (ptr = ptr->children; ptr; ptr = ptr->next)
 639             {
 640                 if (ptr->type == XML_ELEMENT_NODE
 641                     && !strcmp((const char *) ptr->name, "record"))
 642                 {
 643                     sptr = m_p->parse_torus_record(ptr);
 644                     break;
 645                 }
 646             }
 647         }
 648         xmlFreeDoc(doc);
 649     }
 650
 651     if (!sptr)
 652     {
 653         *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 654         *addinfo = odr_strdup(odr, database.c_str());
 655         BackendPtr b;
 656         return b;
 657     }
 658
 659     xsltStylesheetPtr xsp = 0;
 660     if (sptr->transform_xsl_fname.length())
 661     {
 662         const char *path = 0;
 663
 664         if (m_p->xsldir.length())
 665             path = m_p->xsldir.c_str();
 666         else
 667             path = m_p->file_path.c_str();
 668         std::string fname;
 669
 670         char fullpath[1024];
 671         char *cp = yaz_filepath_resolve(sptr->transform_xsl_fname.c_str(),
 672                                         path, 0, fullpath);
 673         if (cp)
 674             fname.assign(cp);
 675         else
 676         {
 677             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 678             *addinfo = (char *)
 679                 odr_malloc(odr, 40 + sptr->transform_xsl_fname.length());
 680             sprintf(*addinfo, "File could not be read: %s",
 681                     sptr->transform_xsl_fname.c_str());
 682             BackendPtr b;
 683             return b;
 684         }
 685         xmlDoc *xsp_doc = xmlParseFile(fname.c_str());
 686         if (!xsp_doc)
 687         {
 688             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 689             *addinfo = (char *) odr_malloc(odr, 40 + fname.length());
 690             sprintf(*addinfo, "xmlParseFile failed. File: %s", fname.c_str());
 691             BackendPtr b;
 692             return b;
 693         }
 694         xsp = xsltParseStylesheetDoc(xsp_doc);
 695         if (!xsp)
 696         {
 697             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 698             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 699             BackendPtr b;
 700             xmlFreeDoc(xsp_doc);
 701             return b;
 702         }
 703     }
 704
 705     m_backend.reset();
 706
 707     BackendPtr b(new Backend(sptr));
 708
 709     b->xsp = xsp;
 710     b->m_frontend_database = database;
 711
 712     if (sptr->query_encoding.length())
 713         b->set_option("rpnCharset", sptr->query_encoding);
 714
 715     b->set_option("timeout", "40");
 716
 717
 718     std::string authentication = sptr->authentication;
 719     std::string proxy = sptr->cfProxy;
 720
 721     const char *param_user = 0;
 722     const char *param_password = 0;
 723     const char *param_proxy = 0;
 724     if (db_args.length())
 725     {
 726         char **names;
 727         char **values;
 728         int i;
 729         int no_parms = yaz_uri_to_array(db_args.c_str(),
 730                                         odr, &names, &values);
 731         for (i = 0; i < no_parms; i++)
 732         {
 733             const char *name = names[i];
 734             const char *value = values[i];
 735             if (!strcmp(name, "user"))
 736                 param_user = value;
 737             else if (!strcmp(name, "password"))
 738                 param_password = value;
 739             else if (!strcmp(name, "proxy"))
 740                 param_proxy = value;
 741             else if (!strcmp(name, "cproxysession"))
 742                 ;
 743             else
 744             {
 745                 BackendPtr notfound;
 746                 char *msg = (char*) odr_malloc(odr, strlen(name) + 30);
 747                 *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 748                 sprintf(msg, "Bad database argument: %s", name);
 749                 *addinfo = msg;
 750                 return notfound;
 751             }
 752         }
 753         if (param_user)
 754         {
 755             authentication = std::string(param_user);
 756             if (param_password)
 757                 authentication += "/" + std::string(param_password);
 758         }
 759         if (param_proxy)
 760             proxy = param_proxy;
 761     }
 762
 763     if (sptr->cfAuth.length())
 764     {
 765         // A CF target
 766         b->set_option("user", sptr->cfAuth);
 767         if (!param_user && !param_password && authentication.length())
 768         {
 769             if (db_args.length())
 770                 db_args += "&";
 771             // no database (auth) args specified already.. and the
 772             // Torus authentication has it.. Generate the args that CF
 773             // understands..
 774             size_t found = authentication.find('/');
 775             if (found != std::string::npos)
 776             {
 777                 db_args += "user=" +
 778                     mp::util::uri_encode(authentication.substr(0, found))
 779                     + "&password=" +
 780                     mp::util::uri_encode(authentication.substr(found+1));
 781             }
 782             else
 783                 db_args += "user=" + mp::util::uri_encode(authentication);
 784         }
 785         if (!param_proxy && proxy.length())
 786         {
 787             if (db_args.length())
 788                 db_args += "&";
 789             db_args += "proxy=" + mp::util::uri_encode(proxy);
 790         }
 791         if (sptr->cfSubDb.length())
 792         {
 793             if (db_args.length())
 794                 db_args += "&";
 795             db_args += "subdatabase=" + mp::util::uri_encode(sptr->cfSubDb);
 796         }
 797     }
 798     else
 799     {
 800         db_args.clear(); // no arguments to be passed (non-CF)
 801
 802         size_t found = authentication.find('/');
 803
 804         if (sptr->sru.length() && found != std::string::npos)
 805         {
 806             b->set_option("user", authentication.substr(0, found));
 807             b->set_option("password", authentication.substr(found+1));
 808         }
 809         else
 810             b->set_option("user", authentication);
 811
 812         if (proxy.length())
 813             b->set_option("proxy", proxy);
 814     }
 815     if (b->sptr->contentConnector.length())
 816     {
 817         int fd;
 818
 819         char *fname = (char *) xmalloc(m_p->content_tmp_file.length() + 8);
 820         strcpy(fname, m_p->content_tmp_file.c_str());
 821         strcat(fname, "XXXXXX");
 822         fd = mkstemp(fname);
 823
 824         if (fd == -1)
 825         {
 826             yaz_log(YLOG_WARN|YLOG_ERRNO, "create %s", fname);
 827             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 828             *addinfo = (char *)  odr_malloc(odr, 40 + strlen(fname));
 829             sprintf(*addinfo, "Could not create %s", fname);
 830             xfree(fname);
 831             BackendPtr backend_null;
 832             return backend_null;
 833         }
 834         b->content_session_id.assign(fname + (strlen(fname) - 6));
 835         WRBUF w = wrbuf_alloc();
 836         wrbuf_puts(w, "#content_proxy\n");
 837         wrbuf_printf(w, "connector: %s\n", b->sptr->contentConnector.c_str());
 838         if (authentication.length())
 839             wrbuf_printf(w, "authentication: %s\n", authentication.c_str());
 840         if (proxy.length())
 841             wrbuf_printf(w, "proxy: %s\n", proxy.c_str());
 842         if (sptr->cfAuth.length())
 843             wrbuf_printf(w, "cfauth: %s\n", sptr->cfAuth.c_str());
 844         if (sptr->cfProxy.length())
 845             wrbuf_printf(w, "cfproxy: %s\n", sptr->cfProxy.c_str());
 846
 847         write(fd, wrbuf_buf(w), wrbuf_len(w));
 848         close(fd);
 849         yaz_log(YLOG_LOG, "file %s created\n", fname);
 850         xfree(fname);
 851     }
 852
 853
 854     std::string url;
 855     if (sptr->sru.length())
 856     {
 857         url = "http://" + sptr->target;
 858         b->set_option("sru", sptr->sru);
 859     }
 860     else
 861     {
 862         url = sptr->target;
 863     }
 864     if (db_args.length())
 865         url += "," + db_args;
 866     yaz_log(YLOG_LOG, "url=%s", url.c_str());
 867     b->connect(url, error, addinfo, odr);
 868     if (*error == 0)
 869     {
 870         m_backend = b;
 871     }
 872     return b;
 873 }
 874
 875 Z_Records *yf::Zoom::Frontend::get_records(Odr_int start,
 876                                            Odr_int number_to_present,
 877                                            int *error,
 878                                            char **addinfo,
 879                                            Odr_int *number_of_records_returned,
 880                                            ODR odr,
 881                                            BackendPtr b,
 882                                            Odr_oid *preferredRecordSyntax,
 883                                            const char *element_set_name)
 884 {
 885     *number_of_records_returned = 0;
 886     Z_Records *records = 0;
 887     bool enable_pz2_retrieval = false; // whether target profile is used
 888     bool enable_pz2_transform = false; // whether XSLT is used as well
 889     bool assume_marc8_charset = false;
 890
 891     if (start < 0 || number_to_present <= 0)
 892         return records;
 893
 894     if (number_to_present > 10000)
 895         number_to_present = 10000;
 896
 897     ZOOM_record *recs = (ZOOM_record *)
 898         odr_malloc(odr, number_to_present * sizeof(*recs));
 899
 900     char oid_name_str[OID_STR_MAX];
 901     const char *syntax_name = 0;
 902
 903     if (preferredRecordSyntax &&
 904         !oid_oidcmp(preferredRecordSyntax, yaz_oid_recsyn_xml)
 905         && element_set_name)
 906     {
 907         if (!strcmp(element_set_name, m_p->element_transform.c_str()))
 908         {
 909             enable_pz2_retrieval = true;
 910             enable_pz2_transform = true;
 911         }
 912         else if (!strcmp(element_set_name, m_p->element_raw.c_str()))
 913         {
 914             enable_pz2_retrieval = true;
 915         }
 916     }
 917
 918     if (enable_pz2_retrieval)
 919     {
 920         if (b->sptr->request_syntax.length())
 921         {
 922             syntax_name = b->sptr->request_syntax.c_str();
 923             const Odr_oid *syntax_oid =
 924                 yaz_string_to_oid(yaz_oid_std(), CLASS_RECSYN, syntax_name);
 925             if (!oid_oidcmp(syntax_oid, yaz_oid_recsyn_usmarc)
 926                 || !oid_oidcmp(syntax_oid, yaz_oid_recsyn_opac))
 927                 assume_marc8_charset = true;
 928         }
 929     }
 930     else if (preferredRecordSyntax)
 931         syntax_name =
 932             yaz_oid_to_string_buf(preferredRecordSyntax, 0, oid_name_str);
 933
 934     b->set_option("preferredRecordSyntax", syntax_name);
 935
 936     if (enable_pz2_retrieval)
 937     {
 938         element_set_name = 0;
 939         if (b->sptr->element_set.length())
 940             element_set_name = b->sptr->element_set.c_str();
 941     }
 942
 943     b->set_option("elementSetName", element_set_name);
 944
 945     b->present(start, number_to_present, recs, error, addinfo, odr);
 946
 947     Odr_int i = 0;
 948     if (!*error)
 949     {
 950         for (i = 0; i < number_to_present; i++)
 951             if (!recs[i])
 952                 break;
 953     }
 954     if (i > 0)
 955     {  // only return records if no error and at least one record
 956         char *odr_database = odr_strdup(odr,
 957                                         b->m_frontend_database.c_str());
 958         Z_NamePlusRecordList *npl = (Z_NamePlusRecordList *)
 959             odr_malloc(odr, sizeof(*npl));
 960         *number_of_records_returned = i;
 961         npl->num_records = i;
 962         npl->records = (Z_NamePlusRecord **)
 963             odr_malloc(odr, i * sizeof(*npl->records));
 964         for (i = 0; i < number_to_present; i++)
 965         {
 966             Z_NamePlusRecord *npr = 0;
 967             const char *addinfo;
 968             int sur_error = ZOOM_record_error(recs[i], 0 /* msg */,
 969                                               &addinfo, 0 /* diagset */);
 970
 971             if (sur_error)
 972             {
 973                 npr = zget_surrogateDiagRec(odr, odr_database, sur_error,
 974                                             addinfo);
 975             }
 976             else if (enable_pz2_retrieval)
 977             {
 978                 char rec_type_str[100];
 979                 const char *record_encoding = 0;
 980
 981                 if (b->sptr->record_encoding.length())
 982                     record_encoding = b->sptr->record_encoding.c_str();
 983                 else if (assume_marc8_charset)
 984                     record_encoding = "marc8";
 985
 986                 strcpy(rec_type_str, b->sptr->use_turbomarc ? "txml" : "xml");
 987                 if (record_encoding)
 988                 {
 989                     strcat(rec_type_str, "; charset=");
 990                     strcat(rec_type_str, record_encoding);
 991                 }
 992
 993                 int rec_len;
 994                 xmlChar *xmlrec_buf = 0;
 995                 const char *rec_buf = ZOOM_record_get(recs[i], rec_type_str,
 996                                                       &rec_len);
 997                 if (!rec_buf && !npr)
 998                 {
 999                     std::string addinfo("ZOOM_record_get failed for type ");
1000
1001                     addinfo += rec_type_str;
1002                     npr = zget_surrogateDiagRec(
1003                         odr, odr_database,
1004                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1005                         addinfo.c_str());
1006                 }
1007
1008                 if (rec_buf && b->xsp && enable_pz2_transform)
1009                 {
1010                     xmlDoc *rec_doc = xmlParseMemory(rec_buf, rec_len);
1011                     if (!rec_doc)
1012                     {
1013                         npr = zget_surrogateDiagRec(
1014                             odr, odr_database,
1015                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1016                             "xml parse failed for record");
1017                     }
1018                     else
1019                     {
1020                         xmlDoc *rec_res =
1021                             xsltApplyStylesheet(b->xsp, rec_doc, 0);
1022
1023                         if (rec_res)
1024                         {
1025                             xsltSaveResultToString(&xmlrec_buf, &rec_len,
1026                                                    rec_res, b->xsp);
1027                             rec_buf = (const char *) xmlrec_buf;
1028
1029                             xmlFreeDoc(rec_res);
1030                         }
1031                         if (!rec_buf)
1032                         {
1033                             std::string addinfo;
1034
1035                             addinfo = "xslt apply failed for "
1036                                 + b->sptr->transform_xsl_fname;
1037                             npr = zget_surrogateDiagRec(
1038                                 odr, odr_database,
1039                                 YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1040                                 addinfo.c_str());
1041                         }
1042                         xmlFreeDoc(rec_doc);
1043                     }
1044                 }
1045
1046                 if (rec_buf)
1047                 {
1048                     xmlDoc *doc = xmlParseMemory(rec_buf, rec_len);
1049                     std::string res =
1050                         mp::xml::url_recipe_handle(doc, b->sptr->urlRecipe);
1051                     if (res.length() && b->content_session_id.length())
1052                     {
1053                         size_t off = res.find_first_of("://");
1054                         if (off != std::string::npos)
1055                         {
1056                             char tmp[1024];
1057                             sprintf(tmp, "%s.%s/",
1058                                     b->content_session_id.c_str(),
1059                                     m_p->content_proxy_server.c_str());
1060                             res.insert(off + 3, tmp);
1061                         }
1062                     }
1063                     if (res.length())
1064                     {
1065                         xmlNode *ptr = xmlDocGetRootElement(doc);
1066                         while (ptr && ptr->type != XML_ELEMENT_NODE)
1067                             ptr = ptr->next;
1068                         xmlNode *c =
1069                             xmlNewChild(ptr, 0, BAD_CAST "generated-url", 0);
1070                         xmlNode * t = xmlNewText(BAD_CAST res.c_str());
1071                         xmlAddChild(c, t);
1072
1073                         if (xmlrec_buf)
1074                             xmlFree(xmlrec_buf);
1075
1076                         xmlDocDumpMemory(doc, &xmlrec_buf, &rec_len);
1077                         rec_buf = (const char *) xmlrec_buf;
1078                     }
1079                     xmlFreeDoc(doc);
1080                 }
1081                 if (!npr)
1082                 {
1083                     if (!rec_buf)
1084                         npr = zget_surrogateDiagRec(
1085                             odr, odr_database,
1086                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1087                             rec_type_str);
1088                     else
1089                     {
1090                         npr = (Z_NamePlusRecord *)
1091                             odr_malloc(odr, sizeof(*npr));
1092                         npr->databaseName = odr_database;
1093                         npr->which = Z_NamePlusRecord_databaseRecord;
1094                         npr->u.databaseRecord =
1095                             z_ext_record_xml(odr, rec_buf, rec_len);
1096                     }
1097                 }
1098                 if (xmlrec_buf)
1099                     xmlFree(xmlrec_buf);
1100             }
1101             else
1102             {
1103                 Z_External *ext =
1104                     (Z_External *) ZOOM_record_get(recs[i], "ext", 0);
1105                 if (ext)
1106                 {
1107                     npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
1108                     npr->databaseName = odr_database;
1109                     npr->which = Z_NamePlusRecord_databaseRecord;
1110                     npr->u.databaseRecord = ext;
1111                 }
1112                 else
1113                 {
1114                     npr = zget_surrogateDiagRec(
1115                         odr, odr_database,
1116                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1117                         "ZOOM_record, type ext");
1118                 }
1119             }
1120             npl->records[i] = npr;
1121         }
1122         records = (Z_Records*) odr_malloc(odr, sizeof(*records));
1123         records->which = Z_Records_DBOSD;
1124         records->u.databaseOrSurDiagnostics = npl;
1125     }
1126     return records;
1127 }
1128
1129 struct cql_node *yf::Zoom::Impl::convert_cql_fields(struct cql_node *cn,
1130                                                     ODR odr)
1131 {
1132     struct cql_node *r = 0;
1133     if (!cn)
1134         return 0;
1135     switch (cn->which)
1136     {
1137     case CQL_NODE_ST:
1138         if (cn->u.st.index)
1139         {
1140             std::map<std::string,std::string>::const_iterator it;
1141             it = fieldmap.find(cn->u.st.index);
1142             if (it == fieldmap.end())
1143                 return cn;
1144             if (it->second.length())
1145                 cn->u.st.index = odr_strdup(odr, it->second.c_str());
1146             else
1147                 cn->u.st.index = 0;
1148         }
1149         break;
1150     case CQL_NODE_BOOL:
1151         r = convert_cql_fields(cn->u.boolean.left, odr);
1152         if (!r)
1153             r = convert_cql_fields(cn->u.boolean.right, odr);
1154         break;
1155     case CQL_NODE_SORT:
1156         r = convert_cql_fields(cn->u.sort.search, odr);
1157         break;
1158     }
1159     return r;
1160 }
1161
1162 static void sort_pqf_type_7(WRBUF pqf_wrbuf, const char *sru_sortkeys)
1163 {
1164     /* sortkey layour: path,schema,ascending,caseSensitive,missingValue */
1165     /* see cql_sortby_to_sortkeys of YAZ. */
1166     char **sortspec;
1167     int num_sortspec = 0;
1168     int i;
1169     NMEM nmem = nmem_create();
1170
1171     if (sru_sortkeys)
1172         nmem_strsplit_blank(nmem, sru_sortkeys, &sortspec, &num_sortspec);
1173     if (num_sortspec > 0)
1174     {
1175         WRBUF w = wrbuf_alloc();
1176         for (i = 0; i < num_sortspec; i++)
1177         {
1178             char **arg;
1179             int num_arg;
1180             int ascending = 1;
1181             nmem_strsplitx(nmem, ",", sortspec[i], &arg, &num_arg, 0);
1182
1183             if (num_arg > 2 && arg[2][0])
1184                 ascending = atoi(arg[2]);
1185
1186             wrbuf_puts(w, "@or @attr 1=");
1187             yaz_encode_pqf_term(w, arg[0], strlen(arg[0]));
1188             wrbuf_printf(w, "@attr 7=%d %d ", ascending ? 1 : 2, i);
1189         }
1190         if (wrbuf_len(w))
1191         {
1192             wrbuf_puts(w, wrbuf_cstr(pqf_wrbuf));
1193             wrbuf_rewind(pqf_wrbuf);
1194             wrbuf_puts(pqf_wrbuf, wrbuf_cstr(w));
1195         }
1196         wrbuf_destroy(w);
1197     }
1198     nmem_destroy(nmem);
1199 }
1200
1201 static void sort_via_cql(WRBUF cql_sortby, const char *sru_sortkeys)
1202 {
1203     /* sortkey layour: path,schema,ascending,caseSensitive,missingValue */
1204     /* see cql_sortby_to_sortkeys of YAZ. */
1205     char **sortspec;
1206     int num_sortspec = 0;
1207     int i;
1208     NMEM nmem = nmem_create();
1209
1210     if (sru_sortkeys)
1211         nmem_strsplit_blank(nmem, sru_sortkeys, &sortspec, &num_sortspec);
1212     if (num_sortspec > 0)
1213     {
1214         WRBUF w = wrbuf_alloc();
1215         for (i = 0; i < num_sortspec; i++)
1216         {
1217             char **arg;
1218             int num_arg;
1219             int ascending = 1;
1220             int case_sensitive = 0;
1221             const char *missing = 0;
1222             nmem_strsplitx(nmem, ",", sortspec[i], &arg, &num_arg, 0);
1223
1224             if (num_arg > 2 && arg[2][0])
1225                 ascending = atoi(arg[2]);
1226             if (num_arg > 3 && arg[3][0])
1227                 case_sensitive = atoi(arg[3]);
1228             if (num_arg > 4 && arg[4][0])
1229                 missing = arg[4];
1230             if (i > 0)
1231                 wrbuf_puts(w, " ");
1232             else
1233                 wrbuf_puts(w, " sortby ");
1234             wrbuf_puts(w, arg[0]);  /* field */
1235             wrbuf_puts(w, "/");
1236             wrbuf_puts(w, ascending ? "ascending" : "descending");
1237             if (case_sensitive)
1238                 wrbuf_puts(w, "/respectCase");
1239             if (missing)
1240             {
1241                 if (!strcmp(missing, "omit"))
1242                     wrbuf_puts(w, "/missingOmit");
1243                 else if (!strcmp(missing, "abort"))
1244                     wrbuf_puts(w, "/missingFail");
1245                 else if (!strcmp(missing, "lowValue"))
1246                     wrbuf_puts(w, "/missingLow");
1247                 else if (!strcmp(missing, "highValue"))
1248                     wrbuf_puts(w, "/missingHigh");
1249             }
1250         }
1251         if (wrbuf_len(w))
1252             wrbuf_puts(cql_sortby, wrbuf_cstr(w));
1253         wrbuf_destroy(w);
1254     }
1255     nmem_destroy(nmem);
1256 }
1257
1258 #if YAZ_VERSIONL < 0x40206
1259 static void wrbuf_vp_puts(const char *buf, void *client_data)
1260 {
1261     WRBUF b = (WRBUF) client_data;
1262     wrbuf_puts(b, buf);
1263 }
1264 #endif
1265
1266 void yf::Zoom::Frontend::handle_search(mp::Package &package)
1267 {
1268     Z_GDU *gdu = package.request().get();
1269     Z_APDU *apdu_req = gdu->u.z3950;
1270     Z_APDU *apdu_res = 0;
1271     mp::odr odr;
1272     Z_SearchRequest *sr = apdu_req->u.searchRequest;
1273     if (sr->num_databaseNames != 1)
1274     {
1275         apdu_res = odr.create_searchResponse(
1276             apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
1277         package.response() = apdu_res;
1278         return;
1279     }
1280
1281     int error = 0;
1282     char *addinfo = 0;
1283     std::string db(sr->databaseNames[0]);
1284     BackendPtr b = get_backend_from_databases(db, &error, &addinfo, odr);
1285     if (error)
1286     {
1287         apdu_res =
1288             odr.create_searchResponse(apdu_req, error, addinfo);
1289         package.response() = apdu_res;
1290         return;
1291     }
1292
1293     b->set_option("setname", "default");
1294
1295     Odr_int hits = 0;
1296     Z_Query *query = sr->query;
1297     WRBUF ccl_wrbuf = 0;
1298     WRBUF pqf_wrbuf = 0;
1299     std::string sru_sortkeys;
1300
1301     if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
1302     {
1303         // RPN
1304         pqf_wrbuf = wrbuf_alloc();
1305         yaz_rpnquery_to_wrbuf(pqf_wrbuf, query->u.type_1);
1306     }
1307     else if (query->which == Z_Query_type_2)
1308     {
1309         // CCL
1310         ccl_wrbuf = wrbuf_alloc();
1311         wrbuf_write(ccl_wrbuf, (const char *) query->u.type_2->buf,
1312                     query->u.type_2->len);
1313     }
1314     else if (query->which == Z_Query_type_104 &&
1315              query->u.type_104->which == Z_External_CQL)
1316     {
1317         // CQL
1318         const char *cql = query->u.type_104->u.cql;
1319         CQL_parser cp = cql_parser_create();
1320         int r = cql_parser_string(cp, cql);
1321         if (r)
1322         {
1323             cql_parser_destroy(cp);
1324             apdu_res =
1325                 odr.create_searchResponse(apdu_req,
1326                                           YAZ_BIB1_MALFORMED_QUERY,
1327                                           "CQL syntax error");
1328             package.response() = apdu_res;
1329             return;
1330         }
1331         struct cql_node *cn = cql_parser_result(cp);
1332         struct cql_node *cn_error = m_p->convert_cql_fields(cn, odr);
1333         if (cn_error)
1334         {
1335             // hopefully we are getting a ptr to a index+relation+term node
1336             addinfo = 0;
1337             if (cn_error->which == CQL_NODE_ST)
1338                 addinfo = cn_error->u.st.index;
1339
1340             apdu_res =
1341                 odr.create_searchResponse(apdu_req,
1342                                           YAZ_BIB1_UNSUPP_USE_ATTRIBUTE,
1343                                           addinfo);
1344             package.response() = apdu_res;
1345             return;
1346         }
1347         char ccl_buf[1024];
1348
1349         r = cql_to_ccl_buf(cn, ccl_buf, sizeof(ccl_buf));
1350         if (r == 0)
1351         {
1352             ccl_wrbuf = wrbuf_alloc();
1353             wrbuf_puts(ccl_wrbuf, ccl_buf);
1354
1355             WRBUF sru_sortkeys_wrbuf = wrbuf_alloc();
1356
1357             cql_sortby_to_sortkeys(cn, wrbuf_vp_puts, sru_sortkeys_wrbuf);
1358
1359             sru_sortkeys.assign(wrbuf_cstr(sru_sortkeys_wrbuf));
1360             wrbuf_destroy(sru_sortkeys_wrbuf);
1361         }
1362         cql_parser_destroy(cp);
1363         if (r)
1364         {
1365             apdu_res =
1366                 odr.create_searchResponse(apdu_req,
1367                                           YAZ_BIB1_MALFORMED_QUERY,
1368                                           "CQL to CCL conversion error");
1369             package.response() = apdu_res;
1370             return;
1371         }
1372     }
1373     else
1374     {
1375         apdu_res =
1376             odr.create_searchResponse(apdu_req, YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
1377         package.response() = apdu_res;
1378         return;
1379     }
1380
1381     if (ccl_wrbuf)
1382     {
1383         // CCL to PQF
1384         assert(pqf_wrbuf == 0);
1385         int cerror, cpos;
1386         struct ccl_rpn_node *cn;
1387         yaz_log(YLOG_LOG, "CCL: %s", wrbuf_cstr(ccl_wrbuf));
1388         cn = ccl_find_str(b->sptr->ccl_bibset, wrbuf_cstr(ccl_wrbuf),
1389                           &cerror, &cpos);
1390         wrbuf_destroy(ccl_wrbuf);
1391         if (!cn)
1392         {
1393             char *addinfo = odr_strdup(odr, ccl_err_msg(cerror));
1394             int z3950_diag = YAZ_BIB1_MALFORMED_QUERY;
1395
1396             switch (cerror)
1397             {
1398             case CCL_ERR_UNKNOWN_QUAL:
1399                 z3950_diag = YAZ_BIB1_UNSUPP_USE_ATTRIBUTE;
1400                 break;
1401             case CCL_ERR_TRUNC_NOT_LEFT:
1402             case CCL_ERR_TRUNC_NOT_RIGHT:
1403             case CCL_ERR_TRUNC_NOT_BOTH:
1404                 z3950_diag = YAZ_BIB1_UNSUPP_TRUNCATION_ATTRIBUTE;
1405                 break;
1406             }
1407             apdu_res =
1408                 odr.create_searchResponse(apdu_req, z3950_diag, addinfo);
1409             package.response() = apdu_res;
1410             return;
1411         }
1412         pqf_wrbuf = wrbuf_alloc();
1413         ccl_pquery(pqf_wrbuf, cn);
1414         ccl_rpn_delete(cn);
1415     }
1416
1417     assert(pqf_wrbuf);
1418     if (b->get_option("sru"))
1419     {
1420         int status = 0;
1421         Z_RPNQuery *zquery;
1422         zquery = p_query_rpn(odr, wrbuf_cstr(pqf_wrbuf));
1423         WRBUF wrb = wrbuf_alloc();
1424
1425         if (!strcmp(b->get_option("sru"), "solr"))
1426         {
1427             solr_transform_t cqlt = solr_transform_create();
1428
1429             status = solr_transform_rpn2solr_wrbuf(cqlt, wrb, zquery);
1430
1431             solr_transform_close(cqlt);
1432         }
1433         else
1434         {
1435             cql_transform_t cqlt = cql_transform_create();
1436
1437             status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery);
1438
1439             cql_transform_close(cqlt);
1440
1441             if (status == 0)
1442                 sort_via_cql(wrb, sru_sortkeys.c_str());
1443         }
1444         if (status == 0)
1445         {
1446             yaz_log(YLOG_LOG, "search CQL: %s", wrbuf_cstr(wrb));
1447             b->search_cql(wrbuf_cstr(wrb), &hits, &error, &addinfo, odr);
1448         }
1449
1450         wrbuf_destroy(wrb);
1451         wrbuf_destroy(pqf_wrbuf);
1452         if (status)
1453         {
1454             apdu_res =
1455                 odr.create_searchResponse(apdu_req, YAZ_BIB1_MALFORMED_QUERY,
1456                                           "can not convert from RPN to CQL/SOLR");
1457             package.response() = apdu_res;
1458             return;
1459         }
1460     }
1461     else
1462     {
1463         sort_pqf_type_7(pqf_wrbuf, sru_sortkeys.c_str());
1464
1465         yaz_log(YLOG_LOG, "search PQF: %s", wrbuf_cstr(pqf_wrbuf));
1466         b->search_pqf(wrbuf_cstr(pqf_wrbuf), &hits, &error, &addinfo, odr);
1467         wrbuf_destroy(pqf_wrbuf);
1468     }
1469
1470     const char *element_set_name = 0;
1471     Odr_int number_to_present = 0;
1472     if (!error)
1473         mp::util::piggyback_sr(sr, hits, number_to_present, &element_set_name);
1474
1475     Odr_int number_of_records_returned = 0;
1476     Z_Records *records = get_records(
1477         0, number_to_present, &error, &addinfo,
1478         &number_of_records_returned, odr, b, sr->preferredRecordSyntax,
1479         element_set_name);
1480     apdu_res = odr.create_searchResponse(apdu_req, error, addinfo);
1481     if (records)
1482     {
1483         apdu_res->u.searchResponse->records = records;
1484         apdu_res->u.searchResponse->numberOfRecordsReturned =
1485             odr_intdup(odr, number_of_records_returned);
1486     }
1487     apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
1488     package.response() = apdu_res;
1489 }
1490
1491 void yf::Zoom::Frontend::handle_present(mp::Package &package)
1492 {
1493     Z_GDU *gdu = package.request().get();
1494     Z_APDU *apdu_req = gdu->u.z3950;
1495     Z_APDU *apdu_res = 0;
1496     Z_PresentRequest *pr = apdu_req->u.presentRequest;
1497
1498     mp::odr odr;
1499     if (!m_backend)
1500     {
1501         package.response() = odr.create_presentResponse(
1502             apdu_req, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST, 0);
1503         return;
1504     }
1505     const char *element_set_name = 0;
1506     Z_RecordComposition *comp = pr->recordComposition;
1507     if (comp && comp->which != Z_RecordComp_simple)
1508     {
1509         package.response() = odr.create_presentResponse(
1510             apdu_req,
1511             YAZ_BIB1_PRESENT_COMP_SPEC_PARAMETER_UNSUPP, 0);
1512         return;
1513     }
1514     if (comp && comp->u.simple->which == Z_ElementSetNames_generic)
1515         element_set_name = comp->u.simple->u.generic;
1516     Odr_int number_of_records_returned = 0;
1517     int error = 0;
1518     char *addinfo = 0;
1519     Z_Records *records = get_records(
1520         *pr->resultSetStartPoint - 1, *pr->numberOfRecordsRequested,
1521         &error, &addinfo, &number_of_records_returned, odr, m_backend,
1522         pr->preferredRecordSyntax, element_set_name);
1523
1524     apdu_res = odr.create_presentResponse(apdu_req, error, addinfo);
1525     if (records)
1526     {
1527         apdu_res->u.presentResponse->records = records;
1528         apdu_res->u.presentResponse->numberOfRecordsReturned =
1529             odr_intdup(odr, number_of_records_returned);
1530     }
1531     package.response() = apdu_res;
1532 }
1533
1534 void yf::Zoom::Frontend::handle_package(mp::Package &package)
1535 {
1536     Z_GDU *gdu = package.request().get();
1537     if (!gdu)
1538         ;
1539     else if (gdu->which == Z_GDU_Z3950)
1540     {
1541         Z_APDU *apdu_req = gdu->u.z3950;
1542         if (apdu_req->which == Z_APDU_initRequest)
1543         {
1544             mp::odr odr;
1545             package.response() = odr.create_close(
1546                 apdu_req,
1547                 Z_Close_protocolError,
1548                 "double init");
1549         }
1550         else if (apdu_req->which == Z_APDU_searchRequest)
1551         {
1552             handle_search(package);
1553         }
1554         else if (apdu_req->which == Z_APDU_presentRequest)
1555         {
1556             handle_present(package);
1557         }
1558         else
1559         {
1560             mp::odr odr;
1561             package.response() = odr.create_close(
1562                 apdu_req,
1563                 Z_Close_protocolError,
1564                 "zoom filter cannot handle this APDU");
1565             package.session().close();
1566         }
1567     }
1568     else
1569     {
1570         package.session().close();
1571     }
1572 }
1573
1574 void yf::Zoom::Impl::process(mp::Package &package)
1575 {
1576     FrontendPtr f = get_frontend(package);
1577     Z_GDU *gdu = package.request().get();
1578
1579     if (f->m_is_virtual)
1580     {
1581         f->handle_package(package);
1582     }
1583     else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1584              Z_APDU_initRequest)
1585     {
1586         Z_InitRequest *req = gdu->u.z3950->u.initRequest;
1587         f->m_init_gdu = gdu;
1588
1589         mp::odr odr;
1590         Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
1591         Z_InitResponse *resp = apdu->u.initResponse;
1592
1593         int i;
1594         static const int masks[] = {
1595             Z_Options_search,
1596             Z_Options_present,
1597             -1
1598         };
1599         for (i = 0; masks[i] != -1; i++)
1600             if (ODR_MASK_GET(req->options, masks[i]))
1601                 ODR_MASK_SET(resp->options, masks[i]);
1602
1603         static const int versions[] = {
1604             Z_ProtocolVersion_1,
1605             Z_ProtocolVersion_2,
1606             Z_ProtocolVersion_3,
1607             -1
1608         };
1609         for (i = 0; versions[i] != -1; i++)
1610             if (ODR_MASK_GET(req->protocolVersion, versions[i]))
1611                 ODR_MASK_SET(resp->protocolVersion, versions[i]);
1612             else
1613                 break;
1614
1615         *resp->preferredMessageSize = *req->preferredMessageSize;
1616         *resp->maximumRecordSize = *req->maximumRecordSize;
1617
1618         package.response() = apdu;
1619         f->m_is_virtual = true;
1620     }
1621     else
1622         package.move();
1623
1624     release_frontend(package);
1625 }
1626
1627
1628 static mp::filter::Base* filter_creator()
1629 {
1630     return new mp::filter::Zoom;
1631 }
1632
1633 extern "C" {
1634     struct metaproxy_1_filter_struct metaproxy_1_filter_zoom = {
1635         0,
1636         "zoom",
1637         filter_creator
1638     };
1639 }
1640
1641
1642 /*
1643  * Local variables:
1644  * c-basic-offset: 4
1645  * c-file-style: "Stroustrup"
1646  * indent-tabs-mode: nil
1647  * End:
1648  * vim: shiftwidth=4 tabstop=8 expandtab
1649  */
1650