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