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 && b->xsp && enable_pz2_transform)
 995                 {
 996                     xmlDoc *rec_doc = xmlParseMemory(rec_buf, rec_len);
 997                     if (rec_doc)
 998                     {
 999                         xmlDoc *rec_res;
1000                         rec_res = xsltApplyStylesheet(b->xsp, rec_doc, 0);
1001
1002                         if (rec_res)
1003                             xsltSaveResultToString(&xmlrec_buf, &rec_len,
1004                                                    rec_res, b->xsp);
1005                         rec_buf = (const char *) xmlrec_buf;
1006                         xmlFreeDoc(rec_doc);
1007                         xmlFreeDoc(rec_res);
1008                     }
1009                 }
1010
1011                 if (rec_buf)
1012                 {
1013                     xmlDoc *doc = xmlParseMemory(rec_buf, rec_len);
1014                     std::string res =
1015                         mp::xml::url_recipe_handle(doc, b->sptr->urlRecipe);
1016                     if (res.length() && b->content_session_id.length())
1017                     {
1018                         size_t off = res.find_first_of("://");
1019                         if (off != std::string::npos)
1020                         {
1021                             char tmp[1024];
1022                             sprintf(tmp, "%s.%s/",
1023                                     b->content_session_id.c_str(),
1024                                     m_p->content_proxy_server.c_str());
1025                             res.insert(off + 3, tmp);
1026                         }
1027                     }
1028                     if (res.length())
1029                     {
1030                         xmlNode *ptr = xmlDocGetRootElement(doc);
1031                         while (ptr && ptr->type != XML_ELEMENT_NODE)
1032                             ptr = ptr->next;
1033                         xmlNode *c =
1034                             xmlNewChild(ptr, 0, BAD_CAST "generated-url", 0);
1035                         xmlNode * t = xmlNewText(BAD_CAST res.c_str());
1036                         xmlAddChild(c, t);
1037
1038                         if (xmlrec_buf)
1039                             xmlFree(xmlrec_buf);
1040
1041                         xmlDocDumpMemory(doc, &xmlrec_buf, &rec_len);
1042                         rec_buf = (const char *) xmlrec_buf;
1043                     }
1044                     xmlFreeDoc(doc);
1045                 }
1046                 if (rec_buf)
1047                 {
1048                     npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
1049                     npr->databaseName = odr_database;
1050                     npr->which = Z_NamePlusRecord_databaseRecord;
1051                     npr->u.databaseRecord =
1052                         z_ext_record_xml(odr, rec_buf, rec_len);
1053                 }
1054                 else
1055                 {
1056                     npr = zget_surrogateDiagRec(
1057                         odr, odr_database,
1058                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1059                         rec_type_str);
1060                 }
1061                 if (xmlrec_buf)
1062                     xmlFree(xmlrec_buf);
1063             }
1064             else
1065             {
1066                 Z_External *ext =
1067                     (Z_External *) ZOOM_record_get(recs[i], "ext", 0);
1068                 if (ext)
1069                 {
1070                     npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
1071                     npr->databaseName = odr_database;
1072                     npr->which = Z_NamePlusRecord_databaseRecord;
1073                     npr->u.databaseRecord = ext;
1074                 }
1075                 else
1076                 {
1077                     npr = zget_surrogateDiagRec(
1078                         odr, odr_database,
1079                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1080                         "ZOOM_record, type ext");
1081                 }
1082             }
1083             npl->records[i] = npr;
1084         }
1085         records = (Z_Records*) odr_malloc(odr, sizeof(*records));
1086         records->which = Z_Records_DBOSD;
1087         records->u.databaseOrSurDiagnostics = npl;
1088     }
1089     return records;
1090 }
1091
1092 struct cql_node *yf::Zoom::Impl::convert_cql_fields(struct cql_node *cn,
1093                                                     ODR odr)
1094 {
1095     struct cql_node *r = 0;
1096     if (!cn)
1097         return 0;
1098     switch (cn->which)
1099     {
1100     case CQL_NODE_ST:
1101         if (cn->u.st.index)
1102         {
1103             std::map<std::string,std::string>::const_iterator it;
1104             it = fieldmap.find(cn->u.st.index);
1105             if (it == fieldmap.end())
1106                 return cn;
1107             if (it->second.length())
1108                 cn->u.st.index = odr_strdup(odr, it->second.c_str());
1109             else
1110                 cn->u.st.index = 0;
1111         }
1112         break;
1113     case CQL_NODE_BOOL:
1114         r = convert_cql_fields(cn->u.boolean.left, odr);
1115         if (!r)
1116             r = convert_cql_fields(cn->u.boolean.right, odr);
1117         break;
1118     case CQL_NODE_SORT:
1119         r = convert_cql_fields(cn->u.sort.search, odr);
1120         break;
1121     }
1122     return r;
1123 }
1124
1125 static void sort_pqf_type_7(WRBUF pqf_wrbuf, const char *sru_sortkeys)
1126 {
1127     /* sortkey layour: path,schema,ascending,caseSensitive,missingValue */
1128     /* see cql_sortby_to_sortkeys of YAZ. */
1129     char **sortspec;
1130     int num_sortspec = 0;
1131     int i;
1132     NMEM nmem = nmem_create();
1133
1134     if (sru_sortkeys)
1135         nmem_strsplit_blank(nmem, sru_sortkeys, &sortspec, &num_sortspec);
1136     if (num_sortspec > 0)
1137     {
1138         WRBUF w = wrbuf_alloc();
1139         for (i = 0; i < num_sortspec; i++)
1140         {
1141             char **arg;
1142             int num_arg;
1143             int ascending = 1;
1144             nmem_strsplitx(nmem, ",", sortspec[i], &arg, &num_arg, 0);
1145
1146             if (num_arg > 2 && arg[2][0])
1147                 ascending = atoi(arg[2]);
1148
1149             wrbuf_puts(w, "@or @attr 1=");
1150             yaz_encode_pqf_term(w, arg[0], strlen(arg[0]));
1151             wrbuf_printf(w, "@attr 7=%d %d ", ascending ? 1 : 2, i);
1152         }
1153         if (wrbuf_len(w))
1154         {
1155             wrbuf_puts(w, wrbuf_cstr(pqf_wrbuf));
1156             wrbuf_rewind(pqf_wrbuf);
1157             wrbuf_puts(pqf_wrbuf, wrbuf_cstr(w));
1158         }
1159         wrbuf_destroy(w);
1160     }
1161     nmem_destroy(nmem);
1162 }
1163
1164 static void sort_via_cql(WRBUF cql_sortby, const char *sru_sortkeys)
1165 {
1166     /* sortkey layour: path,schema,ascending,caseSensitive,missingValue */
1167     /* see cql_sortby_to_sortkeys of YAZ. */
1168     char **sortspec;
1169     int num_sortspec = 0;
1170     int i;
1171     NMEM nmem = nmem_create();
1172
1173     if (sru_sortkeys)
1174         nmem_strsplit_blank(nmem, sru_sortkeys, &sortspec, &num_sortspec);
1175     if (num_sortspec > 0)
1176     {
1177         WRBUF w = wrbuf_alloc();
1178         for (i = 0; i < num_sortspec; i++)
1179         {
1180             char **arg;
1181             int num_arg;
1182             int ascending = 1;
1183             int case_sensitive = 0;
1184             const char *missing = 0;
1185             nmem_strsplitx(nmem, ",", sortspec[i], &arg, &num_arg, 0);
1186
1187             if (num_arg > 2 && arg[2][0])
1188                 ascending = atoi(arg[2]);
1189             if (num_arg > 3 && arg[3][0])
1190                 case_sensitive = atoi(arg[3]);
1191             if (num_arg > 4 && arg[4][0])
1192                 missing = arg[4];
1193             if (i > 0)
1194                 wrbuf_puts(w, " ");
1195             else
1196                 wrbuf_puts(w, " sortby ");
1197             wrbuf_puts(w, arg[0]);  /* field */
1198             wrbuf_puts(w, "/");
1199             wrbuf_puts(w, ascending ? "ascending" : "descending");
1200             if (case_sensitive)
1201                 wrbuf_puts(w, "/respectCase");
1202             if (missing)
1203             {
1204                 if (!strcmp(missing, "omit"))
1205                     wrbuf_puts(w, "/missingOmit");
1206                 else if (!strcmp(missing, "abort"))
1207                     wrbuf_puts(w, "/missingFail");
1208                 else if (!strcmp(missing, "lowValue"))
1209                     wrbuf_puts(w, "/missingLow");
1210                 else if (!strcmp(missing, "highValue"))
1211                     wrbuf_puts(w, "/missingHigh");
1212             }
1213         }
1214         if (wrbuf_len(w))
1215             wrbuf_puts(cql_sortby, wrbuf_cstr(w));
1216         wrbuf_destroy(w);
1217     }
1218     nmem_destroy(nmem);
1219 }
1220
1221
1222 void yf::Zoom::Frontend::handle_search(mp::Package &package)
1223 {
1224     Z_GDU *gdu = package.request().get();
1225     Z_APDU *apdu_req = gdu->u.z3950;
1226     Z_APDU *apdu_res = 0;
1227     mp::odr odr;
1228     Z_SearchRequest *sr = apdu_req->u.searchRequest;
1229     if (sr->num_databaseNames != 1)
1230     {
1231         apdu_res = odr.create_searchResponse(
1232             apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
1233         package.response() = apdu_res;
1234         return;
1235     }
1236
1237     int error = 0;
1238     char *addinfo = 0;
1239     std::string db(sr->databaseNames[0]);
1240     BackendPtr b = get_backend_from_databases(db, &error, &addinfo, odr);
1241     if (error)
1242     {
1243         apdu_res =
1244             odr.create_searchResponse(apdu_req, error, addinfo);
1245         package.response() = apdu_res;
1246         return;
1247     }
1248
1249     b->set_option("setname", "default");
1250
1251     Odr_int hits = 0;
1252     Z_Query *query = sr->query;
1253     WRBUF ccl_wrbuf = 0;
1254     WRBUF pqf_wrbuf = 0;
1255     std::string sru_sortkeys;
1256
1257     if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
1258     {
1259         // RPN
1260         pqf_wrbuf = wrbuf_alloc();
1261         yaz_rpnquery_to_wrbuf(pqf_wrbuf, query->u.type_1);
1262     }
1263     else if (query->which == Z_Query_type_2)
1264     {
1265         // CCL
1266         ccl_wrbuf = wrbuf_alloc();
1267         wrbuf_write(ccl_wrbuf, (const char *) query->u.type_2->buf,
1268                     query->u.type_2->len);
1269     }
1270     else if (query->which == Z_Query_type_104 &&
1271              query->u.type_104->which == Z_External_CQL)
1272     {
1273         // CQL
1274         const char *cql = query->u.type_104->u.cql;
1275         CQL_parser cp = cql_parser_create();
1276         int r = cql_parser_string(cp, cql);
1277         if (r)
1278         {
1279             cql_parser_destroy(cp);
1280             apdu_res =
1281                 odr.create_searchResponse(apdu_req,
1282                                           YAZ_BIB1_MALFORMED_QUERY,
1283                                           "CQL syntax error");
1284             package.response() = apdu_res;
1285             return;
1286         }
1287         struct cql_node *cn = cql_parser_result(cp);
1288         struct cql_node *cn_error = m_p->convert_cql_fields(cn, odr);
1289         if (cn_error)
1290         {
1291             // hopefully we are getting a ptr to a index+relation+term node
1292             addinfo = 0;
1293             if (cn_error->which == CQL_NODE_ST)
1294                 addinfo = cn_error->u.st.index;
1295
1296             apdu_res =
1297                 odr.create_searchResponse(apdu_req,
1298                                           YAZ_BIB1_UNSUPP_USE_ATTRIBUTE,
1299                                           addinfo);
1300             package.response() = apdu_res;
1301             return;
1302         }
1303         char ccl_buf[1024];
1304
1305         r = cql_to_ccl_buf(cn, ccl_buf, sizeof(ccl_buf));
1306         if (r == 0)
1307         {
1308             ccl_wrbuf = wrbuf_alloc();
1309             wrbuf_puts(ccl_wrbuf, ccl_buf);
1310
1311             WRBUF sru_sortkeys_wrbuf = wrbuf_alloc();
1312
1313             cql_sortby_to_sortkeys(cn, wrbuf_vp_puts, sru_sortkeys_wrbuf);
1314
1315             sru_sortkeys.assign(wrbuf_cstr(sru_sortkeys_wrbuf));
1316             wrbuf_destroy(sru_sortkeys_wrbuf);
1317         }
1318         cql_parser_destroy(cp);
1319         if (r)
1320         {
1321             apdu_res =
1322                 odr.create_searchResponse(apdu_req,
1323                                           YAZ_BIB1_MALFORMED_QUERY,
1324                                           "CQL to CCL conversion error");
1325             package.response() = apdu_res;
1326             return;
1327         }
1328     }
1329     else
1330     {
1331         apdu_res =
1332             odr.create_searchResponse(apdu_req, YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
1333         package.response() = apdu_res;
1334         return;
1335     }
1336
1337     if (ccl_wrbuf)
1338     {
1339         // CCL to PQF
1340         assert(pqf_wrbuf == 0);
1341         int cerror, cpos;
1342         struct ccl_rpn_node *cn;
1343         yaz_log(YLOG_LOG, "CCL: %s", wrbuf_cstr(ccl_wrbuf));
1344         cn = ccl_find_str(b->sptr->ccl_bibset, wrbuf_cstr(ccl_wrbuf),
1345                           &cerror, &cpos);
1346         wrbuf_destroy(ccl_wrbuf);
1347         if (!cn)
1348         {
1349             char *addinfo = odr_strdup(odr, ccl_err_msg(cerror));
1350             int z3950_diag = YAZ_BIB1_MALFORMED_QUERY;
1351
1352             switch (cerror)
1353             {
1354             case CCL_ERR_UNKNOWN_QUAL:
1355                 z3950_diag = YAZ_BIB1_UNSUPP_USE_ATTRIBUTE;
1356                 break;
1357             case CCL_ERR_TRUNC_NOT_LEFT:
1358             case CCL_ERR_TRUNC_NOT_RIGHT:
1359             case CCL_ERR_TRUNC_NOT_BOTH:
1360                 z3950_diag = YAZ_BIB1_UNSUPP_TRUNCATION_ATTRIBUTE;
1361                 break;
1362             }
1363             apdu_res =
1364                 odr.create_searchResponse(apdu_req, z3950_diag, addinfo);
1365             package.response() = apdu_res;
1366             return;
1367         }
1368         pqf_wrbuf = wrbuf_alloc();
1369         ccl_pquery(pqf_wrbuf, cn);
1370         ccl_rpn_delete(cn);
1371     }
1372
1373     assert(pqf_wrbuf);
1374     if (b->get_option("sru"))
1375     {
1376         int status = 0;
1377         Z_RPNQuery *zquery;
1378         zquery = p_query_rpn(odr, wrbuf_cstr(pqf_wrbuf));
1379         WRBUF wrb = wrbuf_alloc();
1380
1381         if (!strcmp(b->get_option("sru"), "solr"))
1382         {
1383             solr_transform_t cqlt = solr_transform_create();
1384
1385             status = solr_transform_rpn2solr_wrbuf(cqlt, wrb, zquery);
1386
1387             solr_transform_close(cqlt);
1388         }
1389         else
1390         {
1391             cql_transform_t cqlt = cql_transform_create();
1392
1393             status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery);
1394
1395             cql_transform_close(cqlt);
1396
1397             if (status == 0)
1398                 sort_via_cql(wrb, sru_sortkeys.c_str());
1399         }
1400         if (status == 0)
1401         {
1402             yaz_log(YLOG_LOG, "search CQL: %s", wrbuf_cstr(wrb));
1403             b->search_cql(wrbuf_cstr(wrb), &hits, &error, &addinfo, odr);
1404         }
1405
1406         wrbuf_destroy(wrb);
1407         wrbuf_destroy(pqf_wrbuf);
1408         if (status)
1409         {
1410             apdu_res =
1411                 odr.create_searchResponse(apdu_req, YAZ_BIB1_MALFORMED_QUERY,
1412                                           "can not convert from RPN to CQL/SOLR");
1413             package.response() = apdu_res;
1414             return;
1415         }
1416     }
1417     else
1418     {
1419         sort_pqf_type_7(pqf_wrbuf, sru_sortkeys.c_str());
1420
1421         yaz_log(YLOG_LOG, "search PQF: %s", wrbuf_cstr(pqf_wrbuf));
1422         b->search_pqf(wrbuf_cstr(pqf_wrbuf), &hits, &error, &addinfo, odr);
1423         wrbuf_destroy(pqf_wrbuf);
1424     }
1425
1426     const char *element_set_name = 0;
1427     Odr_int number_to_present = 0;
1428     if (!error)
1429         mp::util::piggyback_sr(sr, hits, number_to_present, &element_set_name);
1430
1431     Odr_int number_of_records_returned = 0;
1432     Z_Records *records = get_records(
1433         0, number_to_present, &error, &addinfo,
1434         &number_of_records_returned, odr, b, sr->preferredRecordSyntax,
1435         element_set_name);
1436     apdu_res = odr.create_searchResponse(apdu_req, error, addinfo);
1437     if (records)
1438     {
1439         apdu_res->u.searchResponse->records = records;
1440         apdu_res->u.searchResponse->numberOfRecordsReturned =
1441             odr_intdup(odr, number_of_records_returned);
1442     }
1443     apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
1444     package.response() = apdu_res;
1445 }
1446
1447 void yf::Zoom::Frontend::handle_present(mp::Package &package)
1448 {
1449     Z_GDU *gdu = package.request().get();
1450     Z_APDU *apdu_req = gdu->u.z3950;
1451     Z_APDU *apdu_res = 0;
1452     Z_PresentRequest *pr = apdu_req->u.presentRequest;
1453
1454     mp::odr odr;
1455     if (!m_backend)
1456     {
1457         package.response() = odr.create_presentResponse(
1458             apdu_req, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST, 0);
1459         return;
1460     }
1461     const char *element_set_name = 0;
1462     Z_RecordComposition *comp = pr->recordComposition;
1463     if (comp && comp->which != Z_RecordComp_simple)
1464     {
1465         package.response() = odr.create_presentResponse(
1466             apdu_req,
1467             YAZ_BIB1_PRESENT_COMP_SPEC_PARAMETER_UNSUPP, 0);
1468         return;
1469     }
1470     if (comp && comp->u.simple->which == Z_ElementSetNames_generic)
1471         element_set_name = comp->u.simple->u.generic;
1472     Odr_int number_of_records_returned = 0;
1473     int error = 0;
1474     char *addinfo = 0;
1475     Z_Records *records = get_records(
1476         *pr->resultSetStartPoint - 1, *pr->numberOfRecordsRequested,
1477         &error, &addinfo, &number_of_records_returned, odr, m_backend,
1478         pr->preferredRecordSyntax, element_set_name);
1479
1480     apdu_res = odr.create_presentResponse(apdu_req, error, addinfo);
1481     if (records)
1482     {
1483         apdu_res->u.presentResponse->records = records;
1484         apdu_res->u.presentResponse->numberOfRecordsReturned =
1485             odr_intdup(odr, number_of_records_returned);
1486     }
1487     package.response() = apdu_res;
1488 }
1489
1490 void yf::Zoom::Frontend::handle_package(mp::Package &package)
1491 {
1492     Z_GDU *gdu = package.request().get();
1493     if (!gdu)
1494         ;
1495     else if (gdu->which == Z_GDU_Z3950)
1496     {
1497         Z_APDU *apdu_req = gdu->u.z3950;
1498         if (apdu_req->which == Z_APDU_initRequest)
1499         {
1500             mp::odr odr;
1501             package.response() = odr.create_close(
1502                 apdu_req,
1503                 Z_Close_protocolError,
1504                 "double init");
1505         }
1506         else if (apdu_req->which == Z_APDU_searchRequest)
1507         {
1508             handle_search(package);
1509         }
1510         else if (apdu_req->which == Z_APDU_presentRequest)
1511         {
1512             handle_present(package);
1513         }
1514         else
1515         {
1516             mp::odr odr;
1517             package.response() = odr.create_close(
1518                 apdu_req,
1519                 Z_Close_protocolError,
1520                 "zoom filter cannot handle this APDU");
1521             package.session().close();
1522         }
1523     }
1524     else
1525     {
1526         package.session().close();
1527     }
1528 }
1529
1530 void yf::Zoom::Impl::process(mp::Package &package)
1531 {
1532     FrontendPtr f = get_frontend(package);
1533     Z_GDU *gdu = package.request().get();
1534
1535     if (f->m_is_virtual)
1536     {
1537         f->handle_package(package);
1538     }
1539     else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1540              Z_APDU_initRequest)
1541     {
1542         Z_InitRequest *req = gdu->u.z3950->u.initRequest;
1543         f->m_init_gdu = gdu;
1544
1545         mp::odr odr;
1546         Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
1547         Z_InitResponse *resp = apdu->u.initResponse;
1548
1549         int i;
1550         static const int masks[] = {
1551             Z_Options_search,
1552             Z_Options_present,
1553             -1
1554         };
1555         for (i = 0; masks[i] != -1; i++)
1556             if (ODR_MASK_GET(req->options, masks[i]))
1557                 ODR_MASK_SET(resp->options, masks[i]);
1558
1559         static const int versions[] = {
1560             Z_ProtocolVersion_1,
1561             Z_ProtocolVersion_2,
1562             Z_ProtocolVersion_3,
1563             -1
1564         };
1565         for (i = 0; versions[i] != -1; i++)
1566             if (ODR_MASK_GET(req->protocolVersion, versions[i]))
1567                 ODR_MASK_SET(resp->protocolVersion, versions[i]);
1568             else
1569                 break;
1570
1571         *resp->preferredMessageSize = *req->preferredMessageSize;
1572         *resp->maximumRecordSize = *req->maximumRecordSize;
1573
1574         package.response() = apdu;
1575         f->m_is_virtual = true;
1576     }
1577     else
1578         package.move();
1579
1580     release_frontend(package);
1581 }
1582
1583
1584 static mp::filter::Base* filter_creator()
1585 {
1586     return new mp::filter::Zoom;
1587 }
1588
1589 extern "C" {
1590     struct metaproxy_1_filter_struct metaproxy_1_filter_zoom = {
1591         0,
1592         "zoom",
1593         filter_creator
1594     };
1595 }
1596
1597
1598 /*
1599  * Local variables:
1600  * c-basic-offset: 4
1601  * c-file-style: "Stroustrup"
1602  * indent-tabs-mode: nil
1603  * End:
1604  * vim: shiftwidth=4 tabstop=8 expandtab
1605  */
1606