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             bool apdu_log;
 149             CCL_bibset bibset;
 150             std::string element_transform;
 151             std::string element_raw;
 152             std::map<std::string,SearchablePtr> s_map;
 153         };
 154     }
 155 }
 156
 157 // define Pimpl wrapper forwarding to Impl
 158
 159 yf::Zoom::Zoom() : m_p(new Impl)
 160 {
 161 }
 162
 163 yf::Zoom::~Zoom()
 164 {  // must have a destructor because of boost::scoped_ptr
 165 }
 166
 167 void yf::Zoom::configure(const xmlNode *xmlnode, bool test_only,
 168                          const char *path)
 169 {
 170     m_p->configure(xmlnode, test_only, path);
 171 }
 172
 173 void yf::Zoom::process(mp::Package &package) const
 174 {
 175     m_p->process(package);
 176 }
 177
 178
 179 // define Implementation stuff
 180
 181 yf::Zoom::Backend::Backend(SearchablePtr ptr) : sptr(ptr)
 182 {
 183     m_connection = ZOOM_connection_create(0);
 184     m_resultset = 0;
 185     xsp = 0;
 186 }
 187
 188 yf::Zoom::Backend::~Backend()
 189 {
 190     if (xsp)
 191         xsltFreeStylesheet(xsp);
 192     ZOOM_connection_destroy(m_connection);
 193     ZOOM_resultset_destroy(m_resultset);
 194 }
 195
 196
 197 void yf::Zoom::Backend::get_zoom_error(int *error, char **addinfo,
 198                                        ODR odr)
 199 {
 200     const char *msg = 0;
 201     const char *zoom_addinfo = 0;
 202     const char *dset = 0;
 203     *error = ZOOM_connection_error_x(m_connection, &msg, &zoom_addinfo, &dset);
 204     if (*error)
 205     {
 206         if (*error >= ZOOM_ERROR_CONNECT)
 207         {
 208             // turn ZOOM diagnostic into a Bib-1 2: with addinfo=zoom err msg
 209             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 210             *addinfo = (char *) odr_malloc(
 211                 odr, 20 + strlen(msg) +
 212                 (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 213             strcpy(*addinfo, msg);
 214             if (zoom_addinfo)
 215             {
 216                 strcat(*addinfo, ": ");
 217                 strcat(*addinfo, zoom_addinfo);
 218                 strcat(*addinfo, " ");
 219             }
 220         }
 221         else
 222         {
 223             if (dset && !strcmp(dset, "info:srw/diagnostic/1"))
 224                 *error = yaz_diag_srw_to_bib1(*error);
 225             *addinfo = (char *) odr_malloc(
 226                 odr, 20 + (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 227             **addinfo = '\0';
 228             if (zoom_addinfo && *zoom_addinfo)
 229             {
 230                 strcpy(*addinfo, zoom_addinfo);
 231                 strcat(*addinfo, " ");
 232             }
 233             strcat(*addinfo, "(backend)");
 234         }
 235     }
 236 }
 237
 238 void yf::Zoom::Backend::connect(std::string zurl,
 239                                 int *error, char **addinfo,
 240                                 ODR odr)
 241 {
 242     ZOOM_connection_connect(m_connection, zurl.c_str(), 0);
 243     get_zoom_error(error, addinfo, odr);
 244 }
 245
 246 void yf::Zoom::Backend::search_pqf(const char *pqf, Odr_int *hits,
 247                                    int *error, char **addinfo, ODR odr)
 248 {
 249     m_resultset = ZOOM_connection_search_pqf(m_connection, pqf);
 250     get_zoom_error(error, addinfo, odr);
 251     if (*error == 0)
 252         *hits = ZOOM_resultset_size(m_resultset);
 253     else
 254         *hits = 0;
 255 }
 256
 257 void yf::Zoom::Backend::search_cql(const char *cql, Odr_int *hits,
 258                                    int *error, char **addinfo, ODR odr)
 259 {
 260     ZOOM_query q = ZOOM_query_create();
 261
 262     ZOOM_query_cql(q, cql);
 263
 264     m_resultset = ZOOM_connection_search(m_connection, q);
 265     ZOOM_query_destroy(q);
 266     get_zoom_error(error, addinfo, odr);
 267     if (*error == 0)
 268         *hits = ZOOM_resultset_size(m_resultset);
 269     else
 270         *hits = 0;
 271 }
 272
 273 void yf::Zoom::Backend::present(Odr_int start, Odr_int number,
 274                                 ZOOM_record *recs,
 275                                 int *error, char **addinfo, ODR odr)
 276 {
 277     ZOOM_resultset_records(m_resultset, recs, start, number);
 278     get_zoom_error(error, addinfo, odr);
 279 }
 280
 281 void yf::Zoom::Backend::set_option(const char *name, const char *value)
 282 {
 283     ZOOM_connection_option_set(m_connection, name, value);
 284     if (m_resultset)
 285         ZOOM_resultset_option_set(m_resultset, name, value);
 286 }
 287
 288 void yf::Zoom::Backend::set_option(const char *name, std::string value)
 289 {
 290     set_option(name, value.c_str());
 291 }
 292
 293 const char *yf::Zoom::Backend::get_option(const char *name)
 294 {
 295     return ZOOM_connection_option_get(m_connection, name);
 296 }
 297
 298 yf::Zoom::Searchable::Searchable(CCL_bibset base)
 299 {
 300     piggyback = true;
 301     use_turbomarc = true;
 302     ccl_bibset = ccl_qual_dup(base);
 303 }
 304
 305 yf::Zoom::Searchable::~Searchable()
 306 {
 307     ccl_qual_rm(&ccl_bibset);
 308 }
 309
 310 yf::Zoom::Frontend::Frontend(Impl *impl) :
 311     m_p(impl), m_is_virtual(false), m_in_use(true)
 312 {
 313 }
 314
 315 yf::Zoom::Frontend::~Frontend()
 316 {
 317 }
 318
 319 yf::Zoom::FrontendPtr yf::Zoom::Impl::get_frontend(mp::Package &package)
 320 {
 321     boost::mutex::scoped_lock lock(m_mutex);
 322
 323     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 324
 325     while(true)
 326     {
 327         it = m_clients.find(package.session());
 328         if (it == m_clients.end())
 329             break;
 330
 331         if (!it->second->m_in_use)
 332         {
 333             it->second->m_in_use = true;
 334             return it->second;
 335         }
 336         m_cond_session_ready.wait(lock);
 337     }
 338     FrontendPtr f(new Frontend(this));
 339     m_clients[package.session()] = f;
 340     f->m_in_use = true;
 341     return f;
 342 }
 343
 344 void yf::Zoom::Impl::release_frontend(mp::Package &package)
 345 {
 346     boost::mutex::scoped_lock lock(m_mutex);
 347     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 348
 349     it = m_clients.find(package.session());
 350     if (it != m_clients.end())
 351     {
 352         if (package.session().is_closed())
 353         {
 354             m_clients.erase(it);
 355         }
 356         else
 357         {
 358             it->second->m_in_use = false;
 359         }
 360         m_cond_session_ready.notify_all();
 361     }
 362 }
 363
 364 yf::Zoom::Impl::Impl() :
 365     apdu_log(false), element_transform("pz2") , element_raw("raw")
 366 {
 367     bibset = ccl_qual_mk();
 368 }
 369
 370 yf::Zoom::Impl::~Impl()
 371 {
 372     ccl_qual_rm(&bibset);
 373 }
 374
 375 yf::Zoom::SearchablePtr yf::Zoom::Impl::parse_torus_record(const xmlNode *ptr)
 376 {
 377     Zoom::SearchablePtr s(new Searchable(bibset));
 378
 379     for (ptr = ptr->children; ptr; ptr = ptr->next)
 380     {
 381         if (ptr->type != XML_ELEMENT_NODE)
 382             continue;
 383         if (!strcmp((const char *) ptr->name, "layer"))
 384             ptr = ptr->children;
 385         else if (!strcmp((const char *) ptr->name,
 386                          "authentication"))
 387         {
 388             s->authentication = mp::xml::get_text(ptr);
 389         }
 390         else if (!strcmp((const char *) ptr->name,
 391                          "cfAuth"))
 392         {
 393             s->cfAuth = mp::xml::get_text(ptr);
 394         }
 395         else if (!strcmp((const char *) ptr->name,
 396                          "cfProxy"))
 397         {
 398             s->cfProxy = mp::xml::get_text(ptr);
 399         }
 400         else if (!strcmp((const char *) ptr->name,
 401                          "cfSubDb"))
 402         {
 403             s->cfSubDb = mp::xml::get_text(ptr);
 404         }
 405         else if (!strcmp((const char *) ptr->name,
 406                          "contentConnector"))
 407         {
 408             s->contentConnector = mp::xml::get_text(ptr);
 409         }
 410         else if (!strcmp((const char *) ptr->name, "udb"))
 411         {
 412             s->udb = mp::xml::get_text(ptr);
 413         }
 414         else if (!strcmp((const char *) ptr->name, "zurl"))
 415         {
 416             s->target = mp::xml::get_text(ptr);
 417         }
 418         else if (!strcmp((const char *) ptr->name, "sru"))
 419         {
 420             s->sru = mp::xml::get_text(ptr);
 421         }
 422         else if (!strcmp((const char *) ptr->name,
 423                          "queryEncoding"))
 424         {
 425             s->query_encoding = mp::xml::get_text(ptr);
 426         }
 427         else if (!strcmp((const char *) ptr->name,
 428                          "piggyback"))
 429         {
 430             s->piggyback = mp::xml::get_bool(ptr, true);
 431         }
 432         else if (!strcmp((const char *) ptr->name,
 433                          "requestSyntax"))
 434         {
 435             s->request_syntax = mp::xml::get_text(ptr);
 436         }
 437         else if (!strcmp((const char *) ptr->name,
 438                          "elementSet"))
 439         {
 440             s->element_set = mp::xml::get_text(ptr);
 441         }
 442         else if (!strcmp((const char *) ptr->name,
 443                          "recordEncoding"))
 444         {
 445             s->record_encoding = mp::xml::get_text(ptr);
 446         }
 447         else if (!strcmp((const char *) ptr->name,
 448                          "transform"))
 449         {
 450             s->transform_xsl_fname = mp::xml::get_text(ptr);
 451         }
 452         else if (!strcmp((const char *) ptr->name,
 453                          "urlRecipe"))
 454         {
 455             s->urlRecipe = mp::xml::get_text(ptr);
 456         }
 457         else if (!strcmp((const char *) ptr->name,
 458                          "useTurboMarc"))
 459         {
 460             ; // useTurboMarc is ignored
 461         }
 462         else if (!strncmp((const char *) ptr->name,
 463                           "cclmap_", 7))
 464         {
 465             std::string value = mp::xml::get_text(ptr);
 466             ccl_qual_fitem(s->ccl_bibset, value.c_str(),
 467                            (const char *) ptr->name + 7);
 468         }
 469     }
 470     return s;
 471 }
 472
 473 void yf::Zoom::Impl::configure_local_records(const xmlNode *ptr, bool test_only)
 474 {
 475     while (ptr && ptr->type != XML_ELEMENT_NODE)
 476         ptr = ptr->next;
 477
 478     if (ptr)
 479     {
 480         if (!strcmp((const char *) ptr->name, "records"))
 481         {
 482             for (ptr = ptr->children; ptr; ptr = ptr->next)
 483             {
 484                 if (ptr->type != XML_ELEMENT_NODE)
 485                     continue;
 486                 if (!strcmp((const char *) ptr->name, "record"))
 487                 {
 488                     SearchablePtr s = parse_torus_record(ptr);
 489                     if (s)
 490                     {
 491                         std::string udb = s->udb;
 492                         if (udb.length())
 493                             s_map[s->udb] = s;
 494                         else
 495                         {
 496                             throw mp::filter::FilterException
 497                                 ("No udb for local torus record");
 498                         }
 499                     }
 500                 }
 501                 else
 502                 {
 503                     throw mp::filter::FilterException
 504                         ("Bad element "
 505                          + std::string((const char *) ptr->name)
 506                          + " in zoom filter inside element "
 507                          "<torus><records>");
 508                 }
 509             }
 510         }
 511         else
 512         {
 513             throw mp::filter::FilterException
 514                 ("Bad element "
 515                  + std::string((const char *) ptr->name)
 516                  + " in zoom filter inside element <torus>");
 517         }
 518     }
 519 }
 520
 521 void yf::Zoom::Impl::configure(const xmlNode *ptr, bool test_only,
 522                                const char *path)
 523 {
 524     content_tmp_file = "/tmp/mp_content_proxy.";
 525     if (path && *path)
 526     {
 527         file_path = path;
 528     }
 529     for (ptr = ptr->children; ptr; ptr = ptr->next)
 530     {
 531         if (ptr->type != XML_ELEMENT_NODE)
 532             continue;
 533         else if (!strcmp((const char *) ptr->name, "torus"))
 534         {
 535             const struct _xmlAttr *attr;
 536             for (attr = ptr->properties; attr; attr = attr->next)
 537             {
 538                 if (!strcmp((const char *) attr->name, "url"))
 539                     torus_url = mp::xml::get_text(attr->children);
 540                 else if (!strcmp((const char *) attr->name, "xsldir"))
 541                     xsldir = mp::xml::get_text(attr->children);
 542                 else if (!strcmp((const char *) attr->name, "element_transform"))
 543                     element_transform = mp::xml::get_text(attr->children);
 544                 else if (!strcmp((const char *) attr->name, "element_raw"))
 545                     element_raw = mp::xml::get_text(attr->children);
 546                 else
 547                     throw mp::filter::FilterException(
 548                         "Bad attribute " + std::string((const char *)
 549                                                        attr->name));
 550             }
 551             configure_local_records(ptr->children, test_only);
 552         }
 553         else if (!strcmp((const char *) ptr->name, "cclmap"))
 554         {
 555             const char *addinfo = 0;
 556             ccl_xml_config(bibset, ptr, &addinfo);
 557         }
 558         else if (!strcmp((const char *) ptr->name, "fieldmap"))
 559         {
 560             const struct _xmlAttr *attr;
 561             std::string ccl_field;
 562             std::string cql_field;
 563             for (attr = ptr->properties; attr; attr = attr->next)
 564             {
 565                 if (!strcmp((const char *) attr->name, "ccl"))
 566                     ccl_field = mp::xml::get_text(attr->children);
 567                 else if (!strcmp((const char *) attr->name, "cql"))
 568                     cql_field = mp::xml::get_text(attr->children);
 569                 else
 570                     throw mp::filter::FilterException(
 571                         "Bad attribute " + std::string((const char *)
 572                                                        attr->name));
 573             }
 574             if (cql_field.length())
 575                 fieldmap[cql_field] = ccl_field;
 576         }
 577         else if (!strcmp((const char *) ptr->name, "contentProxy"))
 578         {
 579             const struct _xmlAttr *attr;
 580             for (attr = ptr->properties; attr; attr = attr->next)
 581             {
 582                 if (!strcmp((const char *) attr->name, "server"))
 583                     content_proxy_server = mp::xml::get_text(attr->children);
 584                 else if (!strcmp((const char *) attr->name, "tmp_file"))
 585                     content_tmp_file = mp::xml::get_text(attr->children);
 586                 else
 587                     throw mp::filter::FilterException(
 588                         "Bad attribute " + std::string((const char *)
 589                                                        attr->name));
 590             }
 591         }
 592         else if (!strcmp((const char *) ptr->name, "log"))
 593         {
 594             const struct _xmlAttr *attr;
 595             for (attr = ptr->properties; attr; attr = attr->next)
 596             {
 597                 if (!strcmp((const char *) attr->name, "apdu"))
 598                     apdu_log = mp::xml::get_bool(attr->children, false);
 599                 else
 600                     throw mp::filter::FilterException(
 601                         "Bad attribute " + std::string((const char *)
 602                                                        attr->name));
 603             }
 604         }
 605         else
 606         {
 607             throw mp::filter::FilterException
 608                 ("Bad element "
 609                  + std::string((const char *) ptr->name)
 610                  + " in zoom filter");
 611         }
 612     }
 613 }
 614
 615 yf::Zoom::BackendPtr yf::Zoom::Frontend::get_backend_from_databases(
 616     std::string &database, int *error, char **addinfo, ODR odr)
 617 {
 618     std::list<BackendPtr>::const_iterator map_it;
 619     if (m_backend && m_backend->m_frontend_database == database)
 620         return m_backend;
 621
 622     std::string db_args;
 623     std::string torus_db;
 624     size_t db_arg_pos = database.find(',');
 625     if (db_arg_pos != std::string::npos)
 626     {
 627         torus_db = database.substr(0, db_arg_pos);
 628         db_args = database.substr(db_arg_pos + 1);
 629     }
 630     else
 631         torus_db = database;
 632
 633     SearchablePtr sptr;
 634
 635     std::map<std::string,SearchablePtr>::iterator it;
 636     it = m_p->s_map.find(torus_db);
 637     if (it != m_p->s_map.end())
 638         sptr = it->second;
 639     else
 640     {
 641         xmlDoc *doc = mp::get_searchable(m_p->torus_url, torus_db);
 642         if (!doc)
 643         {
 644             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 645             *addinfo = odr_strdup(odr, database.c_str());
 646             BackendPtr b;
 647             return b;
 648         }
 649         const xmlNode *ptr = xmlDocGetRootElement(doc);
 650         if (ptr)
 651         {   // presumably ptr is a records element node
 652             // parse first record in document
 653             for (ptr = ptr->children; ptr; ptr = ptr->next)
 654             {
 655                 if (ptr->type == XML_ELEMENT_NODE
 656                     && !strcmp((const char *) ptr->name, "record"))
 657                 {
 658                     sptr = m_p->parse_torus_record(ptr);
 659                     break;
 660                 }
 661             }
 662         }
 663         xmlFreeDoc(doc);
 664     }
 665
 666     if (!sptr)
 667     {
 668         *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 669         *addinfo = odr_strdup(odr, database.c_str());
 670         BackendPtr b;
 671         return b;
 672     }
 673
 674     xsltStylesheetPtr xsp = 0;
 675     if (sptr->transform_xsl_fname.length())
 676     {
 677         const char *path = 0;
 678
 679         if (m_p->xsldir.length())
 680             path = m_p->xsldir.c_str();
 681         else
 682             path = m_p->file_path.c_str();
 683         std::string fname;
 684
 685         char fullpath[1024];
 686         char *cp = yaz_filepath_resolve(sptr->transform_xsl_fname.c_str(),
 687                                         path, 0, fullpath);
 688         if (cp)
 689             fname.assign(cp);
 690         else
 691         {
 692             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 693             *addinfo = (char *)
 694                 odr_malloc(odr, 40 + sptr->transform_xsl_fname.length());
 695             sprintf(*addinfo, "File could not be read: %s",
 696                     sptr->transform_xsl_fname.c_str());
 697             BackendPtr b;
 698             return b;
 699         }
 700         xmlDoc *xsp_doc = xmlParseFile(fname.c_str());
 701         if (!xsp_doc)
 702         {
 703             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 704             *addinfo = (char *) odr_malloc(odr, 40 + fname.length());
 705             sprintf(*addinfo, "xmlParseFile failed. File: %s", fname.c_str());
 706             BackendPtr b;
 707             return b;
 708         }
 709         xsp = xsltParseStylesheetDoc(xsp_doc);
 710         if (!xsp)
 711         {
 712             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 713             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 714             BackendPtr b;
 715             xmlFreeDoc(xsp_doc);
 716             return b;
 717         }
 718     }
 719
 720     m_backend.reset();
 721
 722     BackendPtr b(new Backend(sptr));
 723
 724     b->xsp = xsp;
 725     b->m_frontend_database = database;
 726
 727     if (sptr->query_encoding.length())
 728         b->set_option("rpnCharset", sptr->query_encoding);
 729
 730     b->set_option("timeout", "40");
 731
 732     if (m_p->apdu_log)
 733         b->set_option("apdulog", "1");
 734
 735     std::string authentication = sptr->authentication;
 736     std::string proxy = sptr->cfProxy;
 737
 738     const char *param_user = 0;
 739     const char *param_password = 0;
 740     const char *param_proxy = 0;
 741     if (db_args.length())
 742     {
 743         char **names;
 744         char **values;
 745         int i;
 746         int no_parms = yaz_uri_to_array(db_args.c_str(),
 747                                         odr, &names, &values);
 748         for (i = 0; i < no_parms; i++)
 749         {
 750             const char *name = names[i];
 751             const char *value = values[i];
 752             if (!strcmp(name, "user"))
 753                 param_user = value;
 754             else if (!strcmp(name, "password"))
 755                 param_password = value;
 756             else if (!strcmp(name, "proxy"))
 757                 param_proxy = value;
 758             else if (!strcmp(name, "cproxysession"))
 759                 ;
 760             else
 761             {
 762                 BackendPtr notfound;
 763                 char *msg = (char*) odr_malloc(odr, strlen(name) + 30);
 764                 *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 765                 sprintf(msg, "Bad database argument: %s", name);
 766                 *addinfo = msg;
 767                 return notfound;
 768             }
 769         }
 770         if (param_user)
 771         {
 772             authentication = std::string(param_user);
 773             if (param_password)
 774                 authentication += "/" + std::string(param_password);
 775         }
 776         if (param_proxy)
 777             proxy = param_proxy;
 778     }
 779
 780     if (sptr->cfAuth.length())
 781     {
 782         // A CF target
 783         b->set_option("user", sptr->cfAuth);
 784         if (!param_user && !param_password && authentication.length())
 785         {
 786             if (db_args.length())
 787                 db_args += "&";
 788             // no database (auth) args specified already.. and the
 789             // Torus authentication has it.. Generate the args that CF
 790             // understands..
 791             size_t found = authentication.find('/');
 792             if (found != std::string::npos)
 793             {
 794                 db_args += "user=" +
 795                     mp::util::uri_encode(authentication.substr(0, found))
 796                     + "&password=" +
 797                     mp::util::uri_encode(authentication.substr(found+1));
 798             }
 799             else
 800                 db_args += "user=" + mp::util::uri_encode(authentication);
 801         }
 802         if (!param_proxy && proxy.length())
 803         {
 804             if (db_args.length())
 805                 db_args += "&";
 806             db_args += "proxy=" + mp::util::uri_encode(proxy);
 807         }
 808         if (sptr->cfSubDb.length())
 809         {
 810             if (db_args.length())
 811                 db_args += "&";
 812             db_args += "subdatabase=" + mp::util::uri_encode(sptr->cfSubDb);
 813         }
 814     }
 815     else
 816     {
 817         db_args.clear(); // no arguments to be passed (non-CF)
 818
 819         size_t found = authentication.find('/');
 820
 821         if (sptr->sru.length() && found != std::string::npos)
 822         {
 823             b->set_option("user", authentication.substr(0, found));
 824             b->set_option("password", authentication.substr(found+1));
 825         }
 826         else
 827             b->set_option("user", authentication);
 828
 829         if (proxy.length())
 830             b->set_option("proxy", proxy);
 831     }
 832     if (b->sptr->contentConnector.length())
 833     {
 834         int fd;
 835
 836         char *fname = (char *) xmalloc(m_p->content_tmp_file.length() + 8);
 837         strcpy(fname, m_p->content_tmp_file.c_str());
 838         strcat(fname, "XXXXXX");
 839         fd = mkstemp(fname);
 840
 841         if (fd == -1)
 842         {
 843             yaz_log(YLOG_WARN|YLOG_ERRNO, "create %s", fname);
 844             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 845             *addinfo = (char *)  odr_malloc(odr, 40 + strlen(fname));
 846             sprintf(*addinfo, "Could not create %s", fname);
 847             xfree(fname);
 848             BackendPtr backend_null;
 849             return backend_null;
 850         }
 851         b->content_session_id.assign(fname + (strlen(fname) - 6));
 852         WRBUF w = wrbuf_alloc();
 853         wrbuf_puts(w, "#content_proxy\n");
 854         wrbuf_printf(w, "connector: %s\n", b->sptr->contentConnector.c_str());
 855         if (authentication.length())
 856             wrbuf_printf(w, "authentication: %s\n", authentication.c_str());
 857         if (proxy.length())
 858             wrbuf_printf(w, "proxy: %s\n", proxy.c_str());
 859         if (sptr->cfAuth.length())
 860             wrbuf_printf(w, "cfauth: %s\n", sptr->cfAuth.c_str());
 861         if (sptr->cfProxy.length())
 862             wrbuf_printf(w, "cfproxy: %s\n", sptr->cfProxy.c_str());
 863
 864         write(fd, wrbuf_buf(w), wrbuf_len(w));
 865         close(fd);
 866         yaz_log(YLOG_LOG, "file %s created\n", fname);
 867         xfree(fname);
 868     }
 869
 870
 871     std::string url;
 872     if (sptr->sru.length())
 873     {
 874         url = "http://" + sptr->target;
 875         b->set_option("sru", sptr->sru);
 876     }
 877     else
 878     {
 879         url = sptr->target;
 880     }
 881     if (db_args.length())
 882         url += "," + db_args;
 883     yaz_log(YLOG_LOG, "url=%s", url.c_str());
 884     b->connect(url, error, addinfo, odr);
 885     if (*error == 0)
 886     {
 887         m_backend = b;
 888     }
 889     return b;
 890 }
 891
 892 Z_Records *yf::Zoom::Frontend::get_records(Odr_int start,
 893                                            Odr_int number_to_present,
 894                                            int *error,
 895                                            char **addinfo,
 896                                            Odr_int *number_of_records_returned,
 897                                            ODR odr,
 898                                            BackendPtr b,
 899                                            Odr_oid *preferredRecordSyntax,
 900                                            const char *element_set_name)
 901 {
 902     *number_of_records_returned = 0;
 903     Z_Records *records = 0;
 904     bool enable_pz2_retrieval = false; // whether target profile is used
 905     bool enable_pz2_transform = false; // whether XSLT is used as well
 906     bool assume_marc8_charset = false;
 907
 908     if (start < 0 || number_to_present <= 0)
 909         return records;
 910
 911     if (number_to_present > 10000)
 912         number_to_present = 10000;
 913
 914     ZOOM_record *recs = (ZOOM_record *)
 915         odr_malloc(odr, number_to_present * sizeof(*recs));
 916
 917     char oid_name_str[OID_STR_MAX];
 918     const char *syntax_name = 0;
 919
 920     if (preferredRecordSyntax &&
 921         !oid_oidcmp(preferredRecordSyntax, yaz_oid_recsyn_xml)
 922         && element_set_name)
 923     {
 924         if (!strcmp(element_set_name, m_p->element_transform.c_str()))
 925         {
 926             enable_pz2_retrieval = true;
 927             enable_pz2_transform = true;
 928         }
 929         else if (!strcmp(element_set_name, m_p->element_raw.c_str()))
 930         {
 931             enable_pz2_retrieval = true;
 932         }
 933     }
 934
 935     if (enable_pz2_retrieval)
 936     {
 937         if (b->sptr->request_syntax.length())
 938         {
 939             syntax_name = b->sptr->request_syntax.c_str();
 940             const Odr_oid *syntax_oid =
 941                 yaz_string_to_oid(yaz_oid_std(), CLASS_RECSYN, syntax_name);
 942             if (!oid_oidcmp(syntax_oid, yaz_oid_recsyn_usmarc)
 943                 || !oid_oidcmp(syntax_oid, yaz_oid_recsyn_opac))
 944                 assume_marc8_charset = true;
 945         }
 946     }
 947     else if (preferredRecordSyntax)
 948         syntax_name =
 949             yaz_oid_to_string_buf(preferredRecordSyntax, 0, oid_name_str);
 950
 951     b->set_option("preferredRecordSyntax", syntax_name);
 952
 953     if (enable_pz2_retrieval)
 954     {
 955         element_set_name = 0;
 956         if (b->sptr->element_set.length())
 957             element_set_name = b->sptr->element_set.c_str();
 958     }
 959
 960     b->set_option("elementSetName", element_set_name);
 961
 962     b->present(start, number_to_present, recs, error, addinfo, odr);
 963
 964     Odr_int i = 0;
 965     if (!*error)
 966     {
 967         for (i = 0; i < number_to_present; i++)
 968             if (!recs[i])
 969                 break;
 970     }
 971     if (i > 0)
 972     {  // only return records if no error and at least one record
 973         char *odr_database = odr_strdup(odr,
 974                                         b->m_frontend_database.c_str());
 975         Z_NamePlusRecordList *npl = (Z_NamePlusRecordList *)
 976             odr_malloc(odr, sizeof(*npl));
 977         *number_of_records_returned = i;
 978         npl->num_records = i;
 979         npl->records = (Z_NamePlusRecord **)
 980             odr_malloc(odr, i * sizeof(*npl->records));
 981         for (i = 0; i < number_to_present; i++)
 982         {
 983             Z_NamePlusRecord *npr = 0;
 984             const char *addinfo;
 985             int sur_error = ZOOM_record_error(recs[i], 0 /* msg */,
 986                                               &addinfo, 0 /* diagset */);
 987
 988             if (sur_error)
 989             {
 990                 npr = zget_surrogateDiagRec(odr, odr_database, sur_error,
 991                                             addinfo);
 992             }
 993             else if (enable_pz2_retrieval)
 994             {
 995                 char rec_type_str[100];
 996                 const char *record_encoding = 0;
 997
 998                 if (b->sptr->record_encoding.length())
 999                     record_encoding = b->sptr->record_encoding.c_str();
1000                 else if (assume_marc8_charset)
1001                     record_encoding = "marc8";
1002
1003                 strcpy(rec_type_str, b->sptr->use_turbomarc ? "txml" : "xml");
1004                 if (record_encoding)
1005                 {
1006                     strcat(rec_type_str, "; charset=");
1007                     strcat(rec_type_str, record_encoding);
1008                 }
1009
1010                 int rec_len;
1011                 xmlChar *xmlrec_buf = 0;
1012                 const char *rec_buf = ZOOM_record_get(recs[i], rec_type_str,
1013                                                       &rec_len);
1014                 if (!rec_buf && !npr)
1015                 {
1016                     std::string addinfo("ZOOM_record_get failed for type ");
1017
1018                     addinfo += rec_type_str;
1019                     npr = zget_surrogateDiagRec(
1020                         odr, odr_database,
1021                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1022                         addinfo.c_str());
1023                 }
1024
1025                 if (rec_buf && b->xsp && enable_pz2_transform)
1026                 {
1027                     xmlDoc *rec_doc = xmlParseMemory(rec_buf, rec_len);
1028                     if (!rec_doc)
1029                     {
1030                         npr = zget_surrogateDiagRec(
1031                             odr, odr_database,
1032                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1033                             "xml parse failed for record");
1034                     }
1035                     else
1036                     {
1037                         xmlDoc *rec_res =
1038                             xsltApplyStylesheet(b->xsp, rec_doc, 0);
1039
1040                         if (rec_res)
1041                         {
1042                             xsltSaveResultToString(&xmlrec_buf, &rec_len,
1043                                                    rec_res, b->xsp);
1044                             rec_buf = (const char *) xmlrec_buf;
1045
1046                             xmlFreeDoc(rec_res);
1047                         }
1048                         if (!rec_buf)
1049                         {
1050                             std::string addinfo;
1051
1052                             addinfo = "xslt apply failed for "
1053                                 + b->sptr->transform_xsl_fname;
1054                             npr = zget_surrogateDiagRec(
1055                                 odr, odr_database,
1056                                 YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1057                                 addinfo.c_str());
1058                         }
1059                         xmlFreeDoc(rec_doc);
1060                     }
1061                 }
1062
1063                 if (rec_buf)
1064                 {
1065                     xmlDoc *doc = xmlParseMemory(rec_buf, rec_len);
1066                     std::string res =
1067                         mp::xml::url_recipe_handle(doc, b->sptr->urlRecipe);
1068                     if (res.length() && b->content_session_id.length())
1069                     {
1070                         size_t off = res.find_first_of("://");
1071                         if (off != std::string::npos)
1072                         {
1073                             char tmp[1024];
1074                             sprintf(tmp, "%s.%s/",
1075                                     b->content_session_id.c_str(),
1076                                     m_p->content_proxy_server.c_str());
1077                             res.insert(off + 3, tmp);
1078                         }
1079                     }
1080                     if (res.length())
1081                     {
1082                         xmlNode *ptr = xmlDocGetRootElement(doc);
1083                         while (ptr && ptr->type != XML_ELEMENT_NODE)
1084                             ptr = ptr->next;
1085                         xmlNode *c =
1086                             xmlNewChild(ptr, 0, BAD_CAST "generated-url", 0);
1087                         xmlNode * t = xmlNewText(BAD_CAST res.c_str());
1088                         xmlAddChild(c, t);
1089
1090                         if (xmlrec_buf)
1091                             xmlFree(xmlrec_buf);
1092
1093                         xmlDocDumpMemory(doc, &xmlrec_buf, &rec_len);
1094                         rec_buf = (const char *) xmlrec_buf;
1095                     }
1096                     xmlFreeDoc(doc);
1097                 }
1098                 if (!npr)
1099                 {
1100                     if (!rec_buf)
1101                         npr = zget_surrogateDiagRec(
1102                             odr, odr_database,
1103                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1104                             rec_type_str);
1105                     else
1106                     {
1107                         npr = (Z_NamePlusRecord *)
1108                             odr_malloc(odr, sizeof(*npr));
1109                         npr->databaseName = odr_database;
1110                         npr->which = Z_NamePlusRecord_databaseRecord;
1111                         npr->u.databaseRecord =
1112                             z_ext_record_xml(odr, rec_buf, rec_len);
1113                     }
1114                 }
1115                 if (xmlrec_buf)
1116                     xmlFree(xmlrec_buf);
1117             }
1118             else
1119             {
1120                 Z_External *ext =
1121                     (Z_External *) ZOOM_record_get(recs[i], "ext", 0);
1122                 if (ext)
1123                 {
1124                     npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
1125                     npr->databaseName = odr_database;
1126                     npr->which = Z_NamePlusRecord_databaseRecord;
1127                     npr->u.databaseRecord = ext;
1128                 }
1129                 else
1130                 {
1131                     npr = zget_surrogateDiagRec(
1132                         odr, odr_database,
1133                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1134                         "ZOOM_record, type ext");
1135                 }
1136             }
1137             npl->records[i] = npr;
1138         }
1139         records = (Z_Records*) odr_malloc(odr, sizeof(*records));
1140         records->which = Z_Records_DBOSD;
1141         records->u.databaseOrSurDiagnostics = npl;
1142     }
1143     return records;
1144 }
1145
1146 struct cql_node *yf::Zoom::Impl::convert_cql_fields(struct cql_node *cn,
1147                                                     ODR odr)
1148 {
1149     struct cql_node *r = 0;
1150     if (!cn)
1151         return 0;
1152     switch (cn->which)
1153     {
1154     case CQL_NODE_ST:
1155         if (cn->u.st.index)
1156         {
1157             std::map<std::string,std::string>::const_iterator it;
1158             it = fieldmap.find(cn->u.st.index);
1159             if (it == fieldmap.end())
1160                 return cn;
1161             if (it->second.length())
1162                 cn->u.st.index = odr_strdup(odr, it->second.c_str());
1163             else
1164                 cn->u.st.index = 0;
1165         }
1166         break;
1167     case CQL_NODE_BOOL:
1168         r = convert_cql_fields(cn->u.boolean.left, odr);
1169         if (!r)
1170             r = convert_cql_fields(cn->u.boolean.right, odr);
1171         break;
1172     case CQL_NODE_SORT:
1173         r = convert_cql_fields(cn->u.sort.search, odr);
1174         break;
1175     }
1176     return r;
1177 }
1178
1179 static void sort_pqf_type_7(WRBUF pqf_wrbuf, const char *sru_sortkeys)
1180 {
1181     /* sortkey layour: path,schema,ascending,caseSensitive,missingValue */
1182     /* see cql_sortby_to_sortkeys of YAZ. */
1183     char **sortspec;
1184     int num_sortspec = 0;
1185     int i;
1186     NMEM nmem = nmem_create();
1187
1188     if (sru_sortkeys)
1189         nmem_strsplit_blank(nmem, sru_sortkeys, &sortspec, &num_sortspec);
1190     if (num_sortspec > 0)
1191     {
1192         WRBUF w = wrbuf_alloc();
1193         for (i = 0; i < num_sortspec; i++)
1194         {
1195             char **arg;
1196             int num_arg;
1197             int ascending = 1;
1198             nmem_strsplitx(nmem, ",", sortspec[i], &arg, &num_arg, 0);
1199
1200             if (num_arg > 2 && arg[2][0])
1201                 ascending = atoi(arg[2]);
1202
1203             wrbuf_puts(w, "@or @attr 1=");
1204             yaz_encode_pqf_term(w, arg[0], strlen(arg[0]));
1205             wrbuf_printf(w, "@attr 7=%d %d ", ascending ? 1 : 2, i);
1206         }
1207         if (wrbuf_len(w))
1208         {
1209             wrbuf_puts(w, wrbuf_cstr(pqf_wrbuf));
1210             wrbuf_rewind(pqf_wrbuf);
1211             wrbuf_puts(pqf_wrbuf, wrbuf_cstr(w));
1212         }
1213         wrbuf_destroy(w);
1214     }
1215     nmem_destroy(nmem);
1216 }
1217
1218 static void sort_via_cql(WRBUF cql_sortby, const char *sru_sortkeys)
1219 {
1220     /* sortkey layour: path,schema,ascending,caseSensitive,missingValue */
1221     /* see cql_sortby_to_sortkeys of YAZ. */
1222     char **sortspec;
1223     int num_sortspec = 0;
1224     int i;
1225     NMEM nmem = nmem_create();
1226
1227     if (sru_sortkeys)
1228         nmem_strsplit_blank(nmem, sru_sortkeys, &sortspec, &num_sortspec);
1229     if (num_sortspec > 0)
1230     {
1231         WRBUF w = wrbuf_alloc();
1232         for (i = 0; i < num_sortspec; i++)
1233         {
1234             char **arg;
1235             int num_arg;
1236             int ascending = 1;
1237             int case_sensitive = 0;
1238             const char *missing = 0;
1239             nmem_strsplitx(nmem, ",", sortspec[i], &arg, &num_arg, 0);
1240
1241             if (num_arg > 2 && arg[2][0])
1242                 ascending = atoi(arg[2]);
1243             if (num_arg > 3 && arg[3][0])
1244                 case_sensitive = atoi(arg[3]);
1245             if (num_arg > 4 && arg[4][0])
1246                 missing = arg[4];
1247             if (i > 0)
1248                 wrbuf_puts(w, " ");
1249             else
1250                 wrbuf_puts(w, " sortby ");
1251             wrbuf_puts(w, arg[0]);  /* field */
1252             wrbuf_puts(w, "/");
1253             wrbuf_puts(w, ascending ? "ascending" : "descending");
1254             if (case_sensitive)
1255                 wrbuf_puts(w, "/respectCase");
1256             if (missing)
1257             {
1258                 if (!strcmp(missing, "omit"))
1259                     wrbuf_puts(w, "/missingOmit");
1260                 else if (!strcmp(missing, "abort"))
1261                     wrbuf_puts(w, "/missingFail");
1262                 else if (!strcmp(missing, "lowValue"))
1263                     wrbuf_puts(w, "/missingLow");
1264                 else if (!strcmp(missing, "highValue"))
1265                     wrbuf_puts(w, "/missingHigh");
1266             }
1267         }
1268         if (wrbuf_len(w))
1269             wrbuf_puts(cql_sortby, wrbuf_cstr(w));
1270         wrbuf_destroy(w);
1271     }
1272     nmem_destroy(nmem);
1273 }
1274
1275 #if YAZ_VERSIONL < 0x40206
1276 static void wrbuf_vp_puts(const char *buf, void *client_data)
1277 {
1278     WRBUF b = (WRBUF) client_data;
1279     wrbuf_puts(b, buf);
1280 }
1281 #endif
1282
1283 void yf::Zoom::Frontend::handle_search(mp::Package &package)
1284 {
1285     Z_GDU *gdu = package.request().get();
1286     Z_APDU *apdu_req = gdu->u.z3950;
1287     Z_APDU *apdu_res = 0;
1288     mp::odr odr;
1289     Z_SearchRequest *sr = apdu_req->u.searchRequest;
1290     if (sr->num_databaseNames != 1)
1291     {
1292         apdu_res = odr.create_searchResponse(
1293             apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
1294         package.response() = apdu_res;
1295         return;
1296     }
1297
1298     int error = 0;
1299     char *addinfo = 0;
1300     std::string db(sr->databaseNames[0]);
1301     BackendPtr b = get_backend_from_databases(db, &error, &addinfo, odr);
1302     if (error)
1303     {
1304         apdu_res =
1305             odr.create_searchResponse(apdu_req, error, addinfo);
1306         package.response() = apdu_res;
1307         return;
1308     }
1309
1310     b->set_option("setname", "default");
1311
1312     Odr_int hits = 0;
1313     Z_Query *query = sr->query;
1314     WRBUF ccl_wrbuf = 0;
1315     WRBUF pqf_wrbuf = 0;
1316     std::string sru_sortkeys;
1317
1318     if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
1319     {
1320         // RPN
1321         pqf_wrbuf = wrbuf_alloc();
1322         yaz_rpnquery_to_wrbuf(pqf_wrbuf, query->u.type_1);
1323     }
1324     else if (query->which == Z_Query_type_2)
1325     {
1326         // CCL
1327         ccl_wrbuf = wrbuf_alloc();
1328         wrbuf_write(ccl_wrbuf, (const char *) query->u.type_2->buf,
1329                     query->u.type_2->len);
1330     }
1331     else if (query->which == Z_Query_type_104 &&
1332              query->u.type_104->which == Z_External_CQL)
1333     {
1334         // CQL
1335         const char *cql = query->u.type_104->u.cql;
1336         CQL_parser cp = cql_parser_create();
1337         int r = cql_parser_string(cp, cql);
1338         if (r)
1339         {
1340             cql_parser_destroy(cp);
1341             apdu_res =
1342                 odr.create_searchResponse(apdu_req,
1343                                           YAZ_BIB1_MALFORMED_QUERY,
1344                                           "CQL syntax error");
1345             package.response() = apdu_res;
1346             return;
1347         }
1348         struct cql_node *cn = cql_parser_result(cp);
1349         struct cql_node *cn_error = m_p->convert_cql_fields(cn, odr);
1350         if (cn_error)
1351         {
1352             // hopefully we are getting a ptr to a index+relation+term node
1353             addinfo = 0;
1354             if (cn_error->which == CQL_NODE_ST)
1355                 addinfo = cn_error->u.st.index;
1356
1357             apdu_res =
1358                 odr.create_searchResponse(apdu_req,
1359                                           YAZ_BIB1_UNSUPP_USE_ATTRIBUTE,
1360                                           addinfo);
1361             package.response() = apdu_res;
1362             return;
1363         }
1364         char ccl_buf[1024];
1365
1366         r = cql_to_ccl_buf(cn, ccl_buf, sizeof(ccl_buf));
1367         if (r == 0)
1368         {
1369             ccl_wrbuf = wrbuf_alloc();
1370             wrbuf_puts(ccl_wrbuf, ccl_buf);
1371
1372             WRBUF sru_sortkeys_wrbuf = wrbuf_alloc();
1373
1374             cql_sortby_to_sortkeys(cn, wrbuf_vp_puts, sru_sortkeys_wrbuf);
1375
1376             sru_sortkeys.assign(wrbuf_cstr(sru_sortkeys_wrbuf));
1377             wrbuf_destroy(sru_sortkeys_wrbuf);
1378         }
1379         cql_parser_destroy(cp);
1380         if (r)
1381         {
1382             apdu_res =
1383                 odr.create_searchResponse(apdu_req,
1384                                           YAZ_BIB1_MALFORMED_QUERY,
1385                                           "CQL to CCL conversion error");
1386             package.response() = apdu_res;
1387             return;
1388         }
1389     }
1390     else
1391     {
1392         apdu_res =
1393             odr.create_searchResponse(apdu_req, YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
1394         package.response() = apdu_res;
1395         return;
1396     }
1397
1398     if (ccl_wrbuf)
1399     {
1400         // CCL to PQF
1401         assert(pqf_wrbuf == 0);
1402         int cerror, cpos;
1403         struct ccl_rpn_node *cn;
1404         yaz_log(YLOG_LOG, "CCL: %s", wrbuf_cstr(ccl_wrbuf));
1405         cn = ccl_find_str(b->sptr->ccl_bibset, wrbuf_cstr(ccl_wrbuf),
1406                           &cerror, &cpos);
1407         wrbuf_destroy(ccl_wrbuf);
1408         if (!cn)
1409         {
1410             char *addinfo = odr_strdup(odr, ccl_err_msg(cerror));
1411             int z3950_diag = YAZ_BIB1_MALFORMED_QUERY;
1412
1413             switch (cerror)
1414             {
1415             case CCL_ERR_UNKNOWN_QUAL:
1416                 z3950_diag = YAZ_BIB1_UNSUPP_USE_ATTRIBUTE;
1417                 break;
1418             case CCL_ERR_TRUNC_NOT_LEFT:
1419             case CCL_ERR_TRUNC_NOT_RIGHT:
1420             case CCL_ERR_TRUNC_NOT_BOTH:
1421                 z3950_diag = YAZ_BIB1_UNSUPP_TRUNCATION_ATTRIBUTE;
1422                 break;
1423             }
1424             apdu_res =
1425                 odr.create_searchResponse(apdu_req, z3950_diag, addinfo);
1426             package.response() = apdu_res;
1427             return;
1428         }
1429         pqf_wrbuf = wrbuf_alloc();
1430         ccl_pquery(pqf_wrbuf, cn);
1431         ccl_rpn_delete(cn);
1432     }
1433
1434     assert(pqf_wrbuf);
1435     if (b->get_option("sru"))
1436     {
1437         int status = 0;
1438         Z_RPNQuery *zquery;
1439         zquery = p_query_rpn(odr, wrbuf_cstr(pqf_wrbuf));
1440         WRBUF wrb = wrbuf_alloc();
1441
1442         if (!strcmp(b->get_option("sru"), "solr"))
1443         {
1444             solr_transform_t cqlt = solr_transform_create();
1445
1446             status = solr_transform_rpn2solr_wrbuf(cqlt, wrb, zquery);
1447
1448             solr_transform_close(cqlt);
1449         }
1450         else
1451         {
1452             cql_transform_t cqlt = cql_transform_create();
1453
1454             status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery);
1455
1456             cql_transform_close(cqlt);
1457
1458             if (status == 0)
1459                 sort_via_cql(wrb, sru_sortkeys.c_str());
1460         }
1461         if (status == 0)
1462         {
1463             yaz_log(YLOG_LOG, "search CQL: %s", wrbuf_cstr(wrb));
1464             b->search_cql(wrbuf_cstr(wrb), &hits, &error, &addinfo, odr);
1465         }
1466
1467         wrbuf_destroy(wrb);
1468         wrbuf_destroy(pqf_wrbuf);
1469         if (status)
1470         {
1471             apdu_res =
1472                 odr.create_searchResponse(apdu_req, YAZ_BIB1_MALFORMED_QUERY,
1473                                           "can not convert from RPN to CQL/SOLR");
1474             package.response() = apdu_res;
1475             return;
1476         }
1477     }
1478     else
1479     {
1480         sort_pqf_type_7(pqf_wrbuf, sru_sortkeys.c_str());
1481
1482         yaz_log(YLOG_LOG, "search PQF: %s", wrbuf_cstr(pqf_wrbuf));
1483         b->search_pqf(wrbuf_cstr(pqf_wrbuf), &hits, &error, &addinfo, odr);
1484         wrbuf_destroy(pqf_wrbuf);
1485     }
1486
1487     const char *element_set_name = 0;
1488     Odr_int number_to_present = 0;
1489     if (!error)
1490         mp::util::piggyback_sr(sr, hits, number_to_present, &element_set_name);
1491
1492     Odr_int number_of_records_returned = 0;
1493     Z_Records *records = get_records(
1494         0, number_to_present, &error, &addinfo,
1495         &number_of_records_returned, odr, b, sr->preferredRecordSyntax,
1496         element_set_name);
1497     apdu_res = odr.create_searchResponse(apdu_req, error, addinfo);
1498     if (records)
1499     {
1500         apdu_res->u.searchResponse->records = records;
1501         apdu_res->u.searchResponse->numberOfRecordsReturned =
1502             odr_intdup(odr, number_of_records_returned);
1503     }
1504     apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
1505     package.response() = apdu_res;
1506 }
1507
1508 void yf::Zoom::Frontend::handle_present(mp::Package &package)
1509 {
1510     Z_GDU *gdu = package.request().get();
1511     Z_APDU *apdu_req = gdu->u.z3950;
1512     Z_APDU *apdu_res = 0;
1513     Z_PresentRequest *pr = apdu_req->u.presentRequest;
1514
1515     mp::odr odr;
1516     if (!m_backend)
1517     {
1518         package.response() = odr.create_presentResponse(
1519             apdu_req, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST, 0);
1520         return;
1521     }
1522     const char *element_set_name = 0;
1523     Z_RecordComposition *comp = pr->recordComposition;
1524     if (comp && comp->which != Z_RecordComp_simple)
1525     {
1526         package.response() = odr.create_presentResponse(
1527             apdu_req,
1528             YAZ_BIB1_PRESENT_COMP_SPEC_PARAMETER_UNSUPP, 0);
1529         return;
1530     }
1531     if (comp && comp->u.simple->which == Z_ElementSetNames_generic)
1532         element_set_name = comp->u.simple->u.generic;
1533     Odr_int number_of_records_returned = 0;
1534     int error = 0;
1535     char *addinfo = 0;
1536     Z_Records *records = get_records(
1537         *pr->resultSetStartPoint - 1, *pr->numberOfRecordsRequested,
1538         &error, &addinfo, &number_of_records_returned, odr, m_backend,
1539         pr->preferredRecordSyntax, element_set_name);
1540
1541     apdu_res = odr.create_presentResponse(apdu_req, error, addinfo);
1542     if (records)
1543     {
1544         apdu_res->u.presentResponse->records = records;
1545         apdu_res->u.presentResponse->numberOfRecordsReturned =
1546             odr_intdup(odr, number_of_records_returned);
1547     }
1548     package.response() = apdu_res;
1549 }
1550
1551 void yf::Zoom::Frontend::handle_package(mp::Package &package)
1552 {
1553     Z_GDU *gdu = package.request().get();
1554     if (!gdu)
1555         ;
1556     else if (gdu->which == Z_GDU_Z3950)
1557     {
1558         Z_APDU *apdu_req = gdu->u.z3950;
1559         if (apdu_req->which == Z_APDU_initRequest)
1560         {
1561             mp::odr odr;
1562             package.response() = odr.create_close(
1563                 apdu_req,
1564                 Z_Close_protocolError,
1565                 "double init");
1566         }
1567         else if (apdu_req->which == Z_APDU_searchRequest)
1568         {
1569             handle_search(package);
1570         }
1571         else if (apdu_req->which == Z_APDU_presentRequest)
1572         {
1573             handle_present(package);
1574         }
1575         else
1576         {
1577             mp::odr odr;
1578             package.response() = odr.create_close(
1579                 apdu_req,
1580                 Z_Close_protocolError,
1581                 "zoom filter cannot handle this APDU");
1582             package.session().close();
1583         }
1584     }
1585     else
1586     {
1587         package.session().close();
1588     }
1589 }
1590
1591 void yf::Zoom::Impl::process(mp::Package &package)
1592 {
1593     FrontendPtr f = get_frontend(package);
1594     Z_GDU *gdu = package.request().get();
1595
1596     if (f->m_is_virtual)
1597     {
1598         f->handle_package(package);
1599     }
1600     else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1601              Z_APDU_initRequest)
1602     {
1603         Z_InitRequest *req = gdu->u.z3950->u.initRequest;
1604         f->m_init_gdu = gdu;
1605
1606         mp::odr odr;
1607         Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
1608         Z_InitResponse *resp = apdu->u.initResponse;
1609
1610         int i;
1611         static const int masks[] = {
1612             Z_Options_search,
1613             Z_Options_present,
1614             -1
1615         };
1616         for (i = 0; masks[i] != -1; i++)
1617             if (ODR_MASK_GET(req->options, masks[i]))
1618                 ODR_MASK_SET(resp->options, masks[i]);
1619
1620         static const int versions[] = {
1621             Z_ProtocolVersion_1,
1622             Z_ProtocolVersion_2,
1623             Z_ProtocolVersion_3,
1624             -1
1625         };
1626         for (i = 0; versions[i] != -1; i++)
1627             if (ODR_MASK_GET(req->protocolVersion, versions[i]))
1628                 ODR_MASK_SET(resp->protocolVersion, versions[i]);
1629             else
1630                 break;
1631
1632         *resp->preferredMessageSize = *req->preferredMessageSize;
1633         *resp->maximumRecordSize = *req->maximumRecordSize;
1634
1635         package.response() = apdu;
1636         f->m_is_virtual = true;
1637     }
1638     else
1639         package.move();
1640
1641     release_frontend(package);
1642 }
1643
1644
1645 static mp::filter::Base* filter_creator()
1646 {
1647     return new mp::filter::Zoom;
1648 }
1649
1650 extern "C" {
1651     struct metaproxy_1_filter_struct metaproxy_1_filter_zoom = {
1652         0,
1653         "zoom",
1654         filter_creator
1655     };
1656 }
1657
1658
1659 /*
1660  * Local variables:
1661  * c-basic-offset: 4
1662  * c-file-style: "Stroustrup"
1663  * indent-tabs-mode: nil
1664  * End:
1665  * vim: shiftwidth=4 tabstop=8 expandtab
1666  */
1667