src/filter_zoom.cpp

   1 /* This file is part of Metaproxy.
   2    Copyright (C) 2005-2011 Index Data
   3
   4 Metaproxy is free software; you can redistribute it and/or modify it under
   5 the terms of the GNU General Public License as published by the Free
   6 Software Foundation; either version 2, or (at your option) any later
   7 version.
   8
   9 Metaproxy is distributed in the hope that it will be useful, but WITHOUT ANY
  10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17 */
  18
  19 #include "config.hpp"
  20
  21 #include <stdlib.h>
  22 #include <sys/types.h>
  23 #include "filter_zoom.hpp"
  24 #include <yaz/zoom.h>
  25 #include <yaz/yaz-version.h>
  26 #include <yaz/tpath.h>
  27 #include <yaz/srw.h>
  28 #include <metaproxy/package.hpp>
  29 #include <metaproxy/util.hpp>
  30 #include <metaproxy/xmlutil.hpp>
  31 #include "torus.hpp"
  32
  33 #include <libxslt/xsltutils.h>
  34 #include <libxslt/transform.h>
  35
  36 #include <boost/thread/mutex.hpp>
  37 #include <boost/thread/condition.hpp>
  38 #include <yaz/ccl_xml.h>
  39 #include <yaz/ccl.h>
  40 #include <yaz/rpn2cql.h>
  41 #include <yaz/rpn2solr.h>
  42 #include <yaz/pquery.h>
  43 #include <yaz/cql.h>
  44 #include <yaz/oid_db.h>
  45 #include <yaz/diagbib1.h>
  46 #include <yaz/log.h>
  47 #include <yaz/zgdu.h>
  48 #include <yaz/querytowrbuf.h>
  49
  50 namespace mp = metaproxy_1;
  51 namespace yf = mp::filter;
  52
  53 namespace metaproxy_1 {
  54     namespace filter {
  55         class Zoom::Searchable : boost::noncopyable {
  56           public:
  57             std::string authentication;
  58             std::string cfAuth;
  59             std::string cfProxy;
  60             std::string cfSubDb;
  61             std::string udb;
  62             std::string target;
  63             std::string query_encoding;
  64             std::string sru;
  65             std::string request_syntax;
  66             std::string element_set;
  67             std::string record_encoding;
  68             std::string transform_xsl_fname;
  69             std::string urlRecipe;
  70             std::string contentConnector;
  71             bool use_turbomarc;
  72             bool piggyback;
  73             CCL_bibset ccl_bibset;
  74             Searchable(CCL_bibset base);
  75             ~Searchable();
  76         };
  77         class Zoom::Backend : boost::noncopyable {
  78             friend class Impl;
  79             friend class Frontend;
  80             std::string zurl;
  81             ZOOM_connection m_connection;
  82             ZOOM_resultset m_resultset;
  83             std::string m_frontend_database;
  84             SearchablePtr sptr;
  85             xsltStylesheetPtr xsp;
  86             std::string content_session_id;
  87         public:
  88             Backend(SearchablePtr sptr);
  89             ~Backend();
  90             void connect(std::string zurl, int *error, char **addinfo,
  91                          ODR odr);
  92             void search_pqf(const char *pqf, Odr_int *hits,
  93                             int *error, char **addinfo, ODR odr);
  94             void search_cql(const char *cql, Odr_int *hits,
  95                             int *error, char **addinfo, ODR odr);
  96             void present(Odr_int start, Odr_int number, ZOOM_record *recs,
  97                          int *error, char **addinfo, ODR odr);
  98             void set_option(const char *name, const char *value);
  99             void set_option(const char *name, std::string value);
 100             const char *get_option(const char *name);
 101             void get_zoom_error(int *error, char **addinfo, ODR odr);
 102         };
 103         class Zoom::Frontend : boost::noncopyable {
 104             friend class Impl;
 105             Impl *m_p;
 106             bool m_is_virtual;
 107             bool m_in_use;
 108             yazpp_1::GDU m_init_gdu;
 109             BackendPtr m_backend;
 110             void handle_package(mp::Package &package);
 111             void handle_search(mp::Package &package);
 112             void handle_present(mp::Package &package);
 113             BackendPtr get_backend_from_databases(std::string &database,
 114                                                   int *error,
 115                                                   char **addinfo,
 116                                                   ODR odr);
 117             Z_Records *get_records(Odr_int start,
 118                                    Odr_int number_to_present,
 119                                    int *error,
 120                                    char **addinfo,
 121                                    Odr_int *number_of_records_returned,
 122                                    ODR odr, BackendPtr b,
 123                                    Odr_oid *preferredRecordSyntax,
 124                                    const char *element_set_name);
 125         public:
 126             Frontend(Impl *impl);
 127             ~Frontend();
 128         };
 129         class Zoom::Impl {
 130             friend class Frontend;
 131         public:
 132             Impl();
 133             ~Impl();
 134             void process(metaproxy_1::Package & package);
 135             void configure(const xmlNode * ptr, bool test_only,
 136                            const char *path);
 137         private:
 138             void configure_local_records(const xmlNode * ptr, bool test_only);
 139             FrontendPtr get_frontend(mp::Package &package);
 140             void release_frontend(mp::Package &package);
 141             SearchablePtr parse_torus_record(const xmlNode *ptr);
 142             struct cql_node *convert_cql_fields(struct cql_node *cn, ODR odr);
 143             std::map<mp::Session, FrontendPtr> m_clients;
 144             boost::mutex m_mutex;
 145             boost::condition m_cond_session_ready;
 146             std::string torus_url;
 147             std::map<std::string,std::string> fieldmap;
 148             std::string xsldir;
 149             std::string file_path;
 150             std::string content_proxy_server;
 151             std::string content_tmp_file;
 152             bool apdu_log;
 153             CCL_bibset bibset;
 154             std::string element_transform;
 155             std::string element_raw;
 156             std::map<std::string,SearchablePtr> s_map;
 157         };
 158     }
 159 }
 160
 161 // define Pimpl wrapper forwarding to Impl
 162
 163 yf::Zoom::Zoom() : m_p(new Impl)
 164 {
 165 }
 166
 167 yf::Zoom::~Zoom()
 168 {  // must have a destructor because of boost::scoped_ptr
 169 }
 170
 171 void yf::Zoom::configure(const xmlNode *xmlnode, bool test_only,
 172                          const char *path)
 173 {
 174     m_p->configure(xmlnode, test_only, path);
 175 }
 176
 177 void yf::Zoom::process(mp::Package &package) const
 178 {
 179     m_p->process(package);
 180 }
 181
 182
 183 // define Implementation stuff
 184
 185 yf::Zoom::Backend::Backend(SearchablePtr ptr) : sptr(ptr)
 186 {
 187     m_connection = ZOOM_connection_create(0);
 188     m_resultset = 0;
 189     xsp = 0;
 190 }
 191
 192 yf::Zoom::Backend::~Backend()
 193 {
 194     if (xsp)
 195         xsltFreeStylesheet(xsp);
 196     ZOOM_connection_destroy(m_connection);
 197     ZOOM_resultset_destroy(m_resultset);
 198 }
 199
 200
 201 void yf::Zoom::Backend::get_zoom_error(int *error, char **addinfo,
 202                                        ODR odr)
 203 {
 204     const char *msg = 0;
 205     const char *zoom_addinfo = 0;
 206     const char *dset = 0;
 207     *error = ZOOM_connection_error_x(m_connection, &msg, &zoom_addinfo, &dset);
 208     if (*error)
 209     {
 210         if (*error >= ZOOM_ERROR_CONNECT)
 211         {
 212             // turn ZOOM diagnostic into a Bib-1 2: with addinfo=zoom err msg
 213             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 214             *addinfo = (char *) odr_malloc(
 215                 odr, 20 + strlen(msg) +
 216                 (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 217             strcpy(*addinfo, msg);
 218             if (zoom_addinfo)
 219             {
 220                 strcat(*addinfo, ": ");
 221                 strcat(*addinfo, zoom_addinfo);
 222                 strcat(*addinfo, " ");
 223             }
 224         }
 225         else
 226         {
 227             if (dset && !strcmp(dset, "info:srw/diagnostic/1"))
 228                 *error = yaz_diag_srw_to_bib1(*error);
 229             *addinfo = (char *) odr_malloc(
 230                 odr, 20 + (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 231             **addinfo = '\0';
 232             if (zoom_addinfo && *zoom_addinfo)
 233             {
 234                 strcpy(*addinfo, zoom_addinfo);
 235                 strcat(*addinfo, " ");
 236             }
 237             strcat(*addinfo, "(backend)");
 238         }
 239     }
 240 }
 241
 242 void yf::Zoom::Backend::connect(std::string zurl,
 243                                 int *error, char **addinfo,
 244                                 ODR odr)
 245 {
 246     ZOOM_connection_connect(m_connection, zurl.c_str(), 0);
 247     get_zoom_error(error, addinfo, odr);
 248 }
 249
 250 void yf::Zoom::Backend::search_pqf(const char *pqf, Odr_int *hits,
 251                                    int *error, char **addinfo, ODR odr)
 252 {
 253     m_resultset = ZOOM_connection_search_pqf(m_connection, pqf);
 254     get_zoom_error(error, addinfo, odr);
 255     if (*error == 0)
 256         *hits = ZOOM_resultset_size(m_resultset);
 257     else
 258         *hits = 0;
 259 }
 260
 261 void yf::Zoom::Backend::search_cql(const char *cql, Odr_int *hits,
 262                                    int *error, char **addinfo, ODR odr)
 263 {
 264     ZOOM_query q = ZOOM_query_create();
 265
 266     ZOOM_query_cql(q, cql);
 267
 268     m_resultset = ZOOM_connection_search(m_connection, q);
 269     ZOOM_query_destroy(q);
 270     get_zoom_error(error, addinfo, odr);
 271     if (*error == 0)
 272         *hits = ZOOM_resultset_size(m_resultset);
 273     else
 274         *hits = 0;
 275 }
 276
 277 void yf::Zoom::Backend::present(Odr_int start, Odr_int number,
 278                                 ZOOM_record *recs,
 279                                 int *error, char **addinfo, ODR odr)
 280 {
 281     ZOOM_resultset_records(m_resultset, recs, start, number);
 282     get_zoom_error(error, addinfo, odr);
 283 }
 284
 285 void yf::Zoom::Backend::set_option(const char *name, const char *value)
 286 {
 287     ZOOM_connection_option_set(m_connection, name, value);
 288     if (m_resultset)
 289         ZOOM_resultset_option_set(m_resultset, name, value);
 290 }
 291
 292 void yf::Zoom::Backend::set_option(const char *name, std::string value)
 293 {
 294     set_option(name, value.c_str());
 295 }
 296
 297 const char *yf::Zoom::Backend::get_option(const char *name)
 298 {
 299     return ZOOM_connection_option_get(m_connection, name);
 300 }
 301
 302 yf::Zoom::Searchable::Searchable(CCL_bibset base)
 303 {
 304     piggyback = true;
 305     use_turbomarc = true;
 306     ccl_bibset = ccl_qual_dup(base);
 307 }
 308
 309 yf::Zoom::Searchable::~Searchable()
 310 {
 311     ccl_qual_rm(&ccl_bibset);
 312 }
 313
 314 yf::Zoom::Frontend::Frontend(Impl *impl) :
 315     m_p(impl), m_is_virtual(false), m_in_use(true)
 316 {
 317 }
 318
 319 yf::Zoom::Frontend::~Frontend()
 320 {
 321 }
 322
 323 yf::Zoom::FrontendPtr yf::Zoom::Impl::get_frontend(mp::Package &package)
 324 {
 325     boost::mutex::scoped_lock lock(m_mutex);
 326
 327     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 328
 329     while(true)
 330     {
 331         it = m_clients.find(package.session());
 332         if (it == m_clients.end())
 333             break;
 334
 335         if (!it->second->m_in_use)
 336         {
 337             it->second->m_in_use = true;
 338             return it->second;
 339         }
 340         m_cond_session_ready.wait(lock);
 341     }
 342     FrontendPtr f(new Frontend(this));
 343     m_clients[package.session()] = f;
 344     f->m_in_use = true;
 345     return f;
 346 }
 347
 348 void yf::Zoom::Impl::release_frontend(mp::Package &package)
 349 {
 350     boost::mutex::scoped_lock lock(m_mutex);
 351     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 352
 353     it = m_clients.find(package.session());
 354     if (it != m_clients.end())
 355     {
 356         if (package.session().is_closed())
 357         {
 358             m_clients.erase(it);
 359         }
 360         else
 361         {
 362             it->second->m_in_use = false;
 363         }
 364         m_cond_session_ready.notify_all();
 365     }
 366 }
 367
 368 yf::Zoom::Impl::Impl() :
 369     apdu_log(false), element_transform("pz2") , element_raw("raw")
 370 {
 371     bibset = ccl_qual_mk();
 372
 373     srand((unsigned int) time(0));
 374 }
 375
 376 yf::Zoom::Impl::~Impl()
 377 {
 378     ccl_qual_rm(&bibset);
 379 }
 380
 381 yf::Zoom::SearchablePtr yf::Zoom::Impl::parse_torus_record(const xmlNode *ptr)
 382 {
 383     Zoom::SearchablePtr s(new Searchable(bibset));
 384
 385     for (ptr = ptr->children; ptr; ptr = ptr->next)
 386     {
 387         if (ptr->type != XML_ELEMENT_NODE)
 388             continue;
 389         if (!strcmp((const char *) ptr->name, "layer"))
 390             ptr = ptr->children;
 391         else if (!strcmp((const char *) ptr->name,
 392                          "authentication"))
 393         {
 394             s->authentication = mp::xml::get_text(ptr);
 395         }
 396         else if (!strcmp((const char *) ptr->name,
 397                          "cfAuth"))
 398         {
 399             s->cfAuth = mp::xml::get_text(ptr);
 400         }
 401         else if (!strcmp((const char *) ptr->name,
 402                          "cfProxy"))
 403         {
 404             s->cfProxy = mp::xml::get_text(ptr);
 405         }
 406         else if (!strcmp((const char *) ptr->name,
 407                          "cfSubDb"))
 408         {
 409             s->cfSubDb = mp::xml::get_text(ptr);
 410         }
 411         else if (!strcmp((const char *) ptr->name,
 412                          "contentConnector"))
 413         {
 414             s->contentConnector = mp::xml::get_text(ptr);
 415         }
 416         else if (!strcmp((const char *) ptr->name, "udb"))
 417         {
 418             s->udb = mp::xml::get_text(ptr);
 419         }
 420         else if (!strcmp((const char *) ptr->name, "zurl"))
 421         {
 422             s->target = mp::xml::get_text(ptr);
 423         }
 424         else if (!strcmp((const char *) ptr->name, "sru"))
 425         {
 426             s->sru = mp::xml::get_text(ptr);
 427         }
 428         else if (!strcmp((const char *) ptr->name,
 429                          "queryEncoding"))
 430         {
 431             s->query_encoding = mp::xml::get_text(ptr);
 432         }
 433         else if (!strcmp((const char *) ptr->name,
 434                          "piggyback"))
 435         {
 436             s->piggyback = mp::xml::get_bool(ptr, true);
 437         }
 438         else if (!strcmp((const char *) ptr->name,
 439                          "requestSyntax"))
 440         {
 441             s->request_syntax = mp::xml::get_text(ptr);
 442         }
 443         else if (!strcmp((const char *) ptr->name,
 444                          "elementSet"))
 445         {
 446             s->element_set = mp::xml::get_text(ptr);
 447         }
 448         else if (!strcmp((const char *) ptr->name,
 449                          "recordEncoding"))
 450         {
 451             s->record_encoding = mp::xml::get_text(ptr);
 452         }
 453         else if (!strcmp((const char *) ptr->name,
 454                          "transform"))
 455         {
 456             s->transform_xsl_fname = mp::xml::get_text(ptr);
 457         }
 458         else if (!strcmp((const char *) ptr->name,
 459                          "urlRecipe"))
 460         {
 461             s->urlRecipe = mp::xml::get_text(ptr);
 462         }
 463         else if (!strcmp((const char *) ptr->name,
 464                          "useTurboMarc"))
 465         {
 466             ; // useTurboMarc is ignored
 467         }
 468         else if (!strncmp((const char *) ptr->name,
 469                           "cclmap_", 7))
 470         {
 471             std::string value = mp::xml::get_text(ptr);
 472             ccl_qual_fitem(s->ccl_bibset, value.c_str(),
 473                            (const char *) ptr->name + 7);
 474         }
 475     }
 476     return s;
 477 }
 478
 479 void yf::Zoom::Impl::configure_local_records(const xmlNode *ptr, bool test_only)
 480 {
 481     while (ptr && ptr->type != XML_ELEMENT_NODE)
 482         ptr = ptr->next;
 483
 484     if (ptr)
 485     {
 486         if (!strcmp((const char *) ptr->name, "records"))
 487         {
 488             for (ptr = ptr->children; ptr; ptr = ptr->next)
 489             {
 490                 if (ptr->type != XML_ELEMENT_NODE)
 491                     continue;
 492                 if (!strcmp((const char *) ptr->name, "record"))
 493                 {
 494                     SearchablePtr s = parse_torus_record(ptr);
 495                     if (s)
 496                     {
 497                         std::string udb = s->udb;
 498                         if (udb.length())
 499                             s_map[s->udb] = s;
 500                         else
 501                         {
 502                             throw mp::filter::FilterException
 503                                 ("No udb for local torus record");
 504                         }
 505                     }
 506                 }
 507                 else
 508                 {
 509                     throw mp::filter::FilterException
 510                         ("Bad element "
 511                          + std::string((const char *) ptr->name)
 512                          + " in zoom filter inside element "
 513                          "<torus><records>");
 514                 }
 515             }
 516         }
 517         else
 518         {
 519             throw mp::filter::FilterException
 520                 ("Bad element "
 521                  + std::string((const char *) ptr->name)
 522                  + " in zoom filter inside element <torus>");
 523         }
 524     }
 525 }
 526
 527 void yf::Zoom::Impl::configure(const xmlNode *ptr, bool test_only,
 528                                const char *path)
 529 {
 530     content_tmp_file = "/tmp/cf.XXXXXX.p";
 531     if (path && *path)
 532     {
 533         file_path = path;
 534     }
 535     for (ptr = ptr->children; ptr; ptr = ptr->next)
 536     {
 537         if (ptr->type != XML_ELEMENT_NODE)
 538             continue;
 539         else if (!strcmp((const char *) ptr->name, "torus"))
 540         {
 541             const struct _xmlAttr *attr;
 542             for (attr = ptr->properties; attr; attr = attr->next)
 543             {
 544                 if (!strcmp((const char *) attr->name, "url"))
 545                     torus_url = mp::xml::get_text(attr->children);
 546                 else if (!strcmp((const char *) attr->name, "xsldir"))
 547                     xsldir = mp::xml::get_text(attr->children);
 548                 else if (!strcmp((const char *) attr->name, "element_transform"))
 549                     element_transform = mp::xml::get_text(attr->children);
 550                 else if (!strcmp((const char *) attr->name, "element_raw"))
 551                     element_raw = mp::xml::get_text(attr->children);
 552                 else
 553                     throw mp::filter::FilterException(
 554                         "Bad attribute " + std::string((const char *)
 555                                                        attr->name));
 556             }
 557             configure_local_records(ptr->children, test_only);
 558         }
 559         else if (!strcmp((const char *) ptr->name, "cclmap"))
 560         {
 561             const char *addinfo = 0;
 562             ccl_xml_config(bibset, ptr, &addinfo);
 563         }
 564         else if (!strcmp((const char *) ptr->name, "fieldmap"))
 565         {
 566             const struct _xmlAttr *attr;
 567             std::string ccl_field;
 568             std::string cql_field;
 569             for (attr = ptr->properties; attr; attr = attr->next)
 570             {
 571                 if (!strcmp((const char *) attr->name, "ccl"))
 572                     ccl_field = mp::xml::get_text(attr->children);
 573                 else if (!strcmp((const char *) attr->name, "cql"))
 574                     cql_field = mp::xml::get_text(attr->children);
 575                 else
 576                     throw mp::filter::FilterException(
 577                         "Bad attribute " + std::string((const char *)
 578                                                        attr->name));
 579             }
 580             if (cql_field.length())
 581                 fieldmap[cql_field] = ccl_field;
 582         }
 583         else if (!strcmp((const char *) ptr->name, "contentProxy"))
 584         {
 585             const struct _xmlAttr *attr;
 586             for (attr = ptr->properties; attr; attr = attr->next)
 587             {
 588                 if (!strcmp((const char *) attr->name, "server"))
 589                     content_proxy_server = mp::xml::get_text(attr->children);
 590                 else if (!strcmp((const char *) attr->name, "tmp_file"))
 591                     content_tmp_file = mp::xml::get_text(attr->children);
 592                 else
 593                     throw mp::filter::FilterException(
 594                         "Bad attribute " + std::string((const char *)
 595                                                        attr->name));
 596             }
 597         }
 598         else if (!strcmp((const char *) ptr->name, "log"))
 599         {
 600             const struct _xmlAttr *attr;
 601             for (attr = ptr->properties; attr; attr = attr->next)
 602             {
 603                 if (!strcmp((const char *) attr->name, "apdu"))
 604                     apdu_log = mp::xml::get_bool(attr->children, false);
 605                 else
 606                     throw mp::filter::FilterException(
 607                         "Bad attribute " + std::string((const char *)
 608                                                        attr->name));
 609             }
 610         }
 611         else
 612         {
 613             throw mp::filter::FilterException
 614                 ("Bad element "
 615                  + std::string((const char *) ptr->name)
 616                  + " in zoom filter");
 617         }
 618     }
 619 }
 620
 621 yf::Zoom::BackendPtr yf::Zoom::Frontend::get_backend_from_databases(
 622     std::string &database, int *error, char **addinfo, ODR odr)
 623 {
 624     std::list<BackendPtr>::const_iterator map_it;
 625     if (m_backend && m_backend->m_frontend_database == database)
 626         return m_backend;
 627
 628     std::string db_args;
 629     std::string torus_db;
 630     size_t db_arg_pos = database.find(',');
 631     if (db_arg_pos != std::string::npos)
 632     {
 633         torus_db = database.substr(0, db_arg_pos);
 634         db_args = database.substr(db_arg_pos + 1);
 635     }
 636     else
 637         torus_db = database;
 638
 639     SearchablePtr sptr;
 640
 641     std::map<std::string,SearchablePtr>::iterator it;
 642     it = m_p->s_map.find(torus_db);
 643     if (it != m_p->s_map.end())
 644         sptr = it->second;
 645     else
 646     {
 647         xmlDoc *doc = mp::get_searchable(m_p->torus_url, torus_db);
 648         if (!doc)
 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         const xmlNode *ptr = xmlDocGetRootElement(doc);
 656         if (ptr)
 657         {   // presumably ptr is a records element node
 658             // parse first record in document
 659             for (ptr = ptr->children; ptr; ptr = ptr->next)
 660             {
 661                 if (ptr->type == XML_ELEMENT_NODE
 662                     && !strcmp((const char *) ptr->name, "record"))
 663                 {
 664                     sptr = m_p->parse_torus_record(ptr);
 665                     break;
 666                 }
 667             }
 668         }
 669         xmlFreeDoc(doc);
 670     }
 671
 672     if (!sptr)
 673     {
 674         *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 675         *addinfo = odr_strdup(odr, database.c_str());
 676         BackendPtr b;
 677         return b;
 678     }
 679
 680     xsltStylesheetPtr xsp = 0;
 681     if (sptr->transform_xsl_fname.length())
 682     {
 683         const char *path = 0;
 684
 685         if (m_p->xsldir.length())
 686             path = m_p->xsldir.c_str();
 687         else
 688             path = m_p->file_path.c_str();
 689         std::string fname;
 690
 691         char fullpath[1024];
 692         char *cp = yaz_filepath_resolve(sptr->transform_xsl_fname.c_str(),
 693                                         path, 0, fullpath);
 694         if (cp)
 695             fname.assign(cp);
 696         else
 697         {
 698             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 699             *addinfo = (char *)
 700                 odr_malloc(odr, 40 + sptr->transform_xsl_fname.length());
 701             sprintf(*addinfo, "File could not be read: %s",
 702                     sptr->transform_xsl_fname.c_str());
 703             BackendPtr b;
 704             return b;
 705         }
 706         xmlDoc *xsp_doc = xmlParseFile(fname.c_str());
 707         if (!xsp_doc)
 708         {
 709             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 710             *addinfo = (char *) odr_malloc(odr, 40 + fname.length());
 711             sprintf(*addinfo, "xmlParseFile failed. File: %s", fname.c_str());
 712             BackendPtr b;
 713             return b;
 714         }
 715         xsp = xsltParseStylesheetDoc(xsp_doc);
 716         if (!xsp)
 717         {
 718             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 719             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 720             BackendPtr b;
 721             xmlFreeDoc(xsp_doc);
 722             return b;
 723         }
 724     }
 725
 726     m_backend.reset();
 727
 728     BackendPtr b(new Backend(sptr));
 729
 730     b->xsp = xsp;
 731     b->m_frontend_database = database;
 732
 733     if (sptr->query_encoding.length())
 734         b->set_option("rpnCharset", sptr->query_encoding);
 735
 736     b->set_option("timeout", "40");
 737
 738     if (m_p->apdu_log)
 739         b->set_option("apdulog", "1");
 740
 741     if (sptr->piggyback)
 742         b->set_option("count", "10");
 743     b->set_option("piggyback", sptr->piggyback ? "1" : "0");
 744
 745     std::string authentication = sptr->authentication;
 746     std::string proxy = sptr->cfProxy;
 747
 748     const char *param_user = 0;
 749     const char *param_password = 0;
 750     const char *param_proxy = 0;
 751     if (db_args.length())
 752     {
 753         char **names;
 754         char **values;
 755         int i;
 756         int no_parms = yaz_uri_to_array(db_args.c_str(),
 757                                         odr, &names, &values);
 758         for (i = 0; i < no_parms; i++)
 759         {
 760             const char *name = names[i];
 761             const char *value = values[i];
 762             if (!strcmp(name, "user"))
 763                 param_user = value;
 764             else if (!strcmp(name, "password"))
 765                 param_password = value;
 766             else if (!strcmp(name, "proxy"))
 767                 param_proxy = value;
 768             else if (!strcmp(name, "cproxysession"))
 769                 ;
 770             else
 771             {
 772                 BackendPtr notfound;
 773                 char *msg = (char*) odr_malloc(odr, strlen(name) + 30);
 774                 *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 775                 sprintf(msg, "Bad database argument: %s", name);
 776                 *addinfo = msg;
 777                 return notfound;
 778             }
 779         }
 780         if (param_user)
 781         {
 782             authentication = std::string(param_user);
 783             if (param_password)
 784                 authentication += "/" + std::string(param_password);
 785         }
 786         if (param_proxy)
 787             proxy = param_proxy;
 788     }
 789
 790     if (sptr->cfAuth.length())
 791     {
 792         // A CF target
 793         b->set_option("user", sptr->cfAuth);
 794         if (!param_user && !param_password && authentication.length())
 795         {
 796             if (db_args.length())
 797                 db_args += "&";
 798             // no database (auth) args specified already.. and the
 799             // Torus authentication has it.. Generate the args that CF
 800             // understands..
 801             size_t found = authentication.find('/');
 802             if (found != std::string::npos)
 803             {
 804                 db_args += "user=" +
 805                     mp::util::uri_encode(authentication.substr(0, found))
 806                     + "&password=" +
 807                     mp::util::uri_encode(authentication.substr(found+1));
 808             }
 809             else
 810                 db_args += "user=" + mp::util::uri_encode(authentication);
 811         }
 812         if (!param_proxy && proxy.length())
 813         {
 814             if (db_args.length())
 815                 db_args += "&";
 816             db_args += "proxy=" + mp::util::uri_encode(proxy);
 817         }
 818         if (sptr->cfSubDb.length())
 819         {
 820             if (db_args.length())
 821                 db_args += "&";
 822             db_args += "subdatabase=" + mp::util::uri_encode(sptr->cfSubDb);
 823         }
 824     }
 825     else
 826     {
 827         db_args.clear(); // no arguments to be passed (non-CF)
 828
 829         size_t found = authentication.find('/');
 830
 831         if (sptr->sru.length() && found != std::string::npos)
 832         {
 833             b->set_option("user", authentication.substr(0, found));
 834             b->set_option("password", authentication.substr(found+1));
 835         }
 836         else
 837             b->set_option("user", authentication);
 838
 839         if (proxy.length())
 840             b->set_option("proxy", proxy);
 841     }
 842     if (b->sptr->contentConnector.length())
 843     {
 844         char *fname = (char *) xmalloc(m_p->content_tmp_file.length() + 8);
 845         strcpy(fname, m_p->content_tmp_file.c_str());
 846         char *xx = strstr(fname, "XXXXXX");
 847         if (!xx)
 848         {
 849             xx = fname + strlen(fname);
 850             strcat(fname, "XXXXXX");
 851         }
 852         char tmp_char = xx[6];
 853         sprintf(xx, "%06d", ((unsigned) rand()) % 1000000);
 854         xx[6] = tmp_char;
 855
 856         FILE *file = fopen(fname, "w");
 857         if (!file)
 858         {
 859             yaz_log(YLOG_WARN|YLOG_ERRNO, "create %s", fname);
 860             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 861             *addinfo = (char *)  odr_malloc(odr, 40 + strlen(fname));
 862             sprintf(*addinfo, "Could not create %s", fname);
 863             xfree(fname);
 864             BackendPtr backend_null;
 865             return backend_null;
 866         }
 867         b->content_session_id.assign(xx, 6);
 868         WRBUF w = wrbuf_alloc();
 869         wrbuf_puts(w, "#content_proxy\n");
 870         wrbuf_printf(w, "connector: %s\n", b->sptr->contentConnector.c_str());
 871         if (authentication.length())
 872             wrbuf_printf(w, "authentication: %s\n", authentication.c_str());
 873         if (proxy.length())
 874             wrbuf_printf(w, "proxy: %s\n", proxy.c_str());
 875         if (sptr->cfProxy.length())
 876             wrbuf_printf(w, "cfproxy: %s\n", sptr->cfProxy.c_str());
 877
 878         fwrite(wrbuf_buf(w), 1, wrbuf_len(w), file);
 879         fclose(file);
 880         yaz_log(YLOG_LOG, "file %s created\n", fname);
 881         xfree(fname);
 882     }
 883
 884     std::string url;
 885     if (sptr->sru.length())
 886     {
 887         url = "http://" + sptr->target;
 888         b->set_option("sru", sptr->sru);
 889     }
 890     else
 891     {
 892         url = sptr->target;
 893     }
 894     if (db_args.length())
 895         url += "," + db_args;
 896     yaz_log(YLOG_LOG, "url=%s", url.c_str());
 897     b->connect(url, error, addinfo, odr);
 898     if (*error == 0)
 899     {
 900         m_backend = b;
 901     }
 902     return b;
 903 }
 904
 905 Z_Records *yf::Zoom::Frontend::get_records(Odr_int start,
 906                                            Odr_int number_to_present,
 907                                            int *error,
 908                                            char **addinfo,
 909                                            Odr_int *number_of_records_returned,
 910                                            ODR odr,
 911                                            BackendPtr b,
 912                                            Odr_oid *preferredRecordSyntax,
 913                                            const char *element_set_name)
 914 {
 915     *number_of_records_returned = 0;
 916     Z_Records *records = 0;
 917     bool enable_pz2_retrieval = false; // whether target profile is used
 918     bool enable_pz2_transform = false; // whether XSLT is used as well
 919     bool assume_marc8_charset = false;
 920
 921     if (start < 0 || number_to_present <= 0)
 922         return records;
 923
 924     if (number_to_present > 10000)
 925         number_to_present = 10000;
 926
 927     ZOOM_record *recs = (ZOOM_record *)
 928         odr_malloc(odr, (size_t) number_to_present * sizeof(*recs));
 929
 930     char oid_name_str[OID_STR_MAX];
 931     const char *syntax_name = 0;
 932
 933     if (preferredRecordSyntax &&
 934         !oid_oidcmp(preferredRecordSyntax, yaz_oid_recsyn_xml)
 935         && element_set_name)
 936     {
 937         if (!strcmp(element_set_name, m_p->element_transform.c_str()))
 938         {
 939             enable_pz2_retrieval = true;
 940             enable_pz2_transform = true;
 941         }
 942         else if (!strcmp(element_set_name, m_p->element_raw.c_str()))
 943         {
 944             enable_pz2_retrieval = true;
 945         }
 946     }
 947
 948     if (enable_pz2_retrieval)
 949     {
 950         if (b->sptr->request_syntax.length())
 951         {
 952             syntax_name = b->sptr->request_syntax.c_str();
 953             const Odr_oid *syntax_oid =
 954                 yaz_string_to_oid(yaz_oid_std(), CLASS_RECSYN, syntax_name);
 955             if (!oid_oidcmp(syntax_oid, yaz_oid_recsyn_usmarc)
 956                 || !oid_oidcmp(syntax_oid, yaz_oid_recsyn_opac))
 957                 assume_marc8_charset = true;
 958         }
 959     }
 960     else if (preferredRecordSyntax)
 961         syntax_name =
 962             yaz_oid_to_string_buf(preferredRecordSyntax, 0, oid_name_str);
 963
 964     b->set_option("preferredRecordSyntax", syntax_name);
 965
 966     if (enable_pz2_retrieval)
 967     {
 968         element_set_name = 0;
 969         if (b->sptr->element_set.length())
 970             element_set_name = b->sptr->element_set.c_str();
 971     }
 972
 973     b->set_option("elementSetName", element_set_name);
 974
 975     b->present(start, number_to_present, recs, error, addinfo, odr);
 976
 977     int i = 0;
 978     if (!*error)
 979     {
 980         for (i = 0; i < number_to_present; i++)
 981             if (!recs[i])
 982                 break;
 983     }
 984     if (i > 0)
 985     {  // only return records if no error and at least one record
 986         char *odr_database = odr_strdup(odr,
 987                                         b->m_frontend_database.c_str());
 988         Z_NamePlusRecordList *npl = (Z_NamePlusRecordList *)
 989             odr_malloc(odr, sizeof(*npl));
 990         *number_of_records_returned = i;
 991         npl->num_records = i;
 992         npl->records = (Z_NamePlusRecord **)
 993             odr_malloc(odr, i * sizeof(*npl->records));
 994         for (i = 0; i < number_to_present; i++)
 995         {
 996             Z_NamePlusRecord *npr = 0;
 997             const char *addinfo;
 998             int sur_error = ZOOM_record_error(recs[i], 0 /* msg */,
 999                                               &addinfo, 0 /* diagset */);
1000
1001             if (sur_error)
1002             {
1003                 npr = zget_surrogateDiagRec(odr, odr_database, sur_error,
1004                                             addinfo);
1005             }
1006             else if (enable_pz2_retrieval)
1007             {
1008                 char rec_type_str[100];
1009                 const char *record_encoding = 0;
1010
1011                 if (b->sptr->record_encoding.length())
1012                     record_encoding = b->sptr->record_encoding.c_str();
1013                 else if (assume_marc8_charset)
1014                     record_encoding = "marc8";
1015
1016                 strcpy(rec_type_str, b->sptr->use_turbomarc ? "txml" : "xml");
1017                 if (record_encoding)
1018                 {
1019                     strcat(rec_type_str, "; charset=");
1020                     strcat(rec_type_str, record_encoding);
1021                 }
1022
1023                 int rec_len;
1024                 xmlChar *xmlrec_buf = 0;
1025                 const char *rec_buf = ZOOM_record_get(recs[i], rec_type_str,
1026                                                       &rec_len);
1027                 if (!rec_buf && !npr)
1028                 {
1029                     std::string addinfo("ZOOM_record_get failed for type ");
1030
1031                     addinfo += rec_type_str;
1032                     npr = zget_surrogateDiagRec(
1033                         odr, odr_database,
1034                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1035                         addinfo.c_str());
1036                 }
1037
1038                 if (rec_buf && b->xsp && enable_pz2_transform)
1039                 {
1040                     xmlDoc *rec_doc = xmlParseMemory(rec_buf, rec_len);
1041                     if (!rec_doc)
1042                     {
1043                         npr = zget_surrogateDiagRec(
1044                             odr, odr_database,
1045                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1046                             "xml parse failed for record");
1047                     }
1048                     else
1049                     {
1050                         xmlDoc *rec_res =
1051                             xsltApplyStylesheet(b->xsp, rec_doc, 0);
1052
1053                         if (rec_res)
1054                         {
1055                             xsltSaveResultToString(&xmlrec_buf, &rec_len,
1056                                                    rec_res, b->xsp);
1057                             rec_buf = (const char *) xmlrec_buf;
1058
1059                             xmlFreeDoc(rec_res);
1060                         }
1061                         if (!rec_buf)
1062                         {
1063                             std::string addinfo;
1064
1065                             addinfo = "xslt apply failed for "
1066                                 + b->sptr->transform_xsl_fname;
1067                             npr = zget_surrogateDiagRec(
1068                                 odr, odr_database,
1069                                 YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1070                                 addinfo.c_str());
1071                         }
1072                         xmlFreeDoc(rec_doc);
1073                     }
1074                 }
1075
1076                 if (rec_buf)
1077                 {
1078                     xmlDoc *doc = xmlParseMemory(rec_buf, rec_len);
1079                     std::string res =
1080                         mp::xml::url_recipe_handle(doc, b->sptr->urlRecipe);
1081                     if (res.length() && b->content_session_id.length())
1082                     {
1083                         size_t off = res.find_first_of("://");
1084                         if (off != std::string::npos)
1085                         {
1086                             char tmp[1024];
1087                             sprintf(tmp, "%s.%s/",
1088                                     b->content_session_id.c_str(),
1089                                     m_p->content_proxy_server.c_str());
1090                             res.insert(off + 3, tmp);
1091                         }
1092                     }
1093                     if (res.length())
1094                     {
1095                         xmlNode *ptr = xmlDocGetRootElement(doc);
1096                         while (ptr && ptr->type != XML_ELEMENT_NODE)
1097                             ptr = ptr->next;
1098                         xmlNode *c =
1099                             xmlNewChild(ptr, 0, BAD_CAST "generated-url", 0);
1100                         xmlNode * t = xmlNewText(BAD_CAST res.c_str());
1101                         xmlAddChild(c, t);
1102
1103                         if (xmlrec_buf)
1104                             xmlFree(xmlrec_buf);
1105
1106                         xmlDocDumpMemory(doc, &xmlrec_buf, &rec_len);
1107                         rec_buf = (const char *) xmlrec_buf;
1108                     }
1109                     xmlFreeDoc(doc);
1110                 }
1111                 if (!npr)
1112                 {
1113                     if (!rec_buf)
1114                         npr = zget_surrogateDiagRec(
1115                             odr, odr_database,
1116                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1117                             rec_type_str);
1118                     else
1119                     {
1120                         npr = (Z_NamePlusRecord *)
1121                             odr_malloc(odr, sizeof(*npr));
1122                         npr->databaseName = odr_database;
1123                         npr->which = Z_NamePlusRecord_databaseRecord;
1124                         npr->u.databaseRecord =
1125                             z_ext_record_xml(odr, rec_buf, rec_len);
1126                     }
1127                 }
1128                 if (xmlrec_buf)
1129                     xmlFree(xmlrec_buf);
1130             }
1131             else
1132             {
1133                 Z_External *ext =
1134                     (Z_External *) ZOOM_record_get(recs[i], "ext", 0);
1135                 if (ext)
1136                 {
1137                     npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
1138                     npr->databaseName = odr_database;
1139                     npr->which = Z_NamePlusRecord_databaseRecord;
1140                     npr->u.databaseRecord = ext;
1141                 }
1142                 else
1143                 {
1144                     npr = zget_surrogateDiagRec(
1145                         odr, odr_database,
1146                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1147                         "ZOOM_record, type ext");
1148                 }
1149             }
1150             npl->records[i] = npr;
1151         }
1152         records = (Z_Records*) odr_malloc(odr, sizeof(*records));
1153         records->which = Z_Records_DBOSD;
1154         records->u.databaseOrSurDiagnostics = npl;
1155     }
1156     return records;
1157 }
1158
1159 struct cql_node *yf::Zoom::Impl::convert_cql_fields(struct cql_node *cn,
1160                                                     ODR odr)
1161 {
1162     struct cql_node *r = 0;
1163     if (!cn)
1164         return 0;
1165     switch (cn->which)
1166     {
1167     case CQL_NODE_ST:
1168         if (cn->u.st.index)
1169         {
1170             std::map<std::string,std::string>::const_iterator it;
1171             it = fieldmap.find(cn->u.st.index);
1172             if (it == fieldmap.end())
1173                 return cn;
1174             if (it->second.length())
1175                 cn->u.st.index = odr_strdup(odr, it->second.c_str());
1176             else
1177                 cn->u.st.index = 0;
1178         }
1179         break;
1180     case CQL_NODE_BOOL:
1181         r = convert_cql_fields(cn->u.boolean.left, odr);
1182         if (!r)
1183             r = convert_cql_fields(cn->u.boolean.right, odr);
1184         break;
1185     case CQL_NODE_SORT:
1186         r = convert_cql_fields(cn->u.sort.search, odr);
1187         break;
1188     }
1189     return r;
1190 }
1191
1192 static void sort_pqf_type_7(WRBUF pqf_wrbuf, const char *sru_sortkeys)
1193 {
1194     /* sortkey layour: path,schema,ascending,caseSensitive,missingValue */
1195     /* see cql_sortby_to_sortkeys of YAZ. */
1196     char **sortspec;
1197     int num_sortspec = 0;
1198     int i;
1199     NMEM nmem = nmem_create();
1200
1201     if (sru_sortkeys)
1202         nmem_strsplit_blank(nmem, sru_sortkeys, &sortspec, &num_sortspec);
1203     if (num_sortspec > 0)
1204     {
1205         WRBUF w = wrbuf_alloc();
1206         for (i = 0; i < num_sortspec; i++)
1207         {
1208             char **arg;
1209             int num_arg;
1210             int ascending = 1;
1211             nmem_strsplitx(nmem, ",", sortspec[i], &arg, &num_arg, 0);
1212
1213             if (num_arg > 2 && arg[2][0])
1214                 ascending = atoi(arg[2]);
1215
1216             wrbuf_puts(w, "@or @attr 1=");
1217             yaz_encode_pqf_term(w, arg[0], strlen(arg[0]));
1218             wrbuf_printf(w, "@attr 7=%d %d ", ascending ? 1 : 2, i);
1219         }
1220         if (wrbuf_len(w))
1221         {
1222             wrbuf_puts(w, wrbuf_cstr(pqf_wrbuf));
1223             wrbuf_rewind(pqf_wrbuf);
1224             wrbuf_puts(pqf_wrbuf, wrbuf_cstr(w));
1225         }
1226         wrbuf_destroy(w);
1227     }
1228     nmem_destroy(nmem);
1229 }
1230
1231 static void sort_via_cql(WRBUF cql_sortby, const char *sru_sortkeys)
1232 {
1233     /* sortkey layour: path,schema,ascending,caseSensitive,missingValue */
1234     /* see cql_sortby_to_sortkeys of YAZ. */
1235     char **sortspec;
1236     int num_sortspec = 0;
1237     int i;
1238     NMEM nmem = nmem_create();
1239
1240     if (sru_sortkeys)
1241         nmem_strsplit_blank(nmem, sru_sortkeys, &sortspec, &num_sortspec);
1242     if (num_sortspec > 0)
1243     {
1244         WRBUF w = wrbuf_alloc();
1245         for (i = 0; i < num_sortspec; i++)
1246         {
1247             char **arg;
1248             int num_arg;
1249             int ascending = 1;
1250             int case_sensitive = 0;
1251             const char *missing = 0;
1252             nmem_strsplitx(nmem, ",", sortspec[i], &arg, &num_arg, 0);
1253
1254             if (num_arg > 2 && arg[2][0])
1255                 ascending = atoi(arg[2]);
1256             if (num_arg > 3 && arg[3][0])
1257                 case_sensitive = atoi(arg[3]);
1258             if (num_arg > 4 && arg[4][0])
1259                 missing = arg[4];
1260             if (i > 0)
1261                 wrbuf_puts(w, " ");
1262             else
1263                 wrbuf_puts(w, " sortby ");
1264             wrbuf_puts(w, arg[0]);  /* field */
1265             wrbuf_puts(w, "/");
1266             wrbuf_puts(w, ascending ? "ascending" : "descending");
1267             if (case_sensitive)
1268                 wrbuf_puts(w, "/respectCase");
1269             if (missing)
1270             {
1271                 if (!strcmp(missing, "omit"))
1272                     wrbuf_puts(w, "/missingOmit");
1273                 else if (!strcmp(missing, "abort"))
1274                     wrbuf_puts(w, "/missingFail");
1275                 else if (!strcmp(missing, "lowValue"))
1276                     wrbuf_puts(w, "/missingLow");
1277                 else if (!strcmp(missing, "highValue"))
1278                     wrbuf_puts(w, "/missingHigh");
1279             }
1280         }
1281         if (wrbuf_len(w))
1282             wrbuf_puts(cql_sortby, wrbuf_cstr(w));
1283         wrbuf_destroy(w);
1284     }
1285     nmem_destroy(nmem);
1286 }
1287
1288 #if YAZ_VERSIONL < 0x40206
1289 static void wrbuf_vp_puts(const char *buf, void *client_data)
1290 {
1291     WRBUF b = (WRBUF) client_data;
1292     wrbuf_puts(b, buf);
1293 }
1294 #endif
1295
1296 void yf::Zoom::Frontend::handle_search(mp::Package &package)
1297 {
1298     Z_GDU *gdu = package.request().get();
1299     Z_APDU *apdu_req = gdu->u.z3950;
1300     Z_APDU *apdu_res = 0;
1301     mp::odr odr;
1302     Z_SearchRequest *sr = apdu_req->u.searchRequest;
1303     if (sr->num_databaseNames != 1)
1304     {
1305         apdu_res = odr.create_searchResponse(
1306             apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
1307         package.response() = apdu_res;
1308         return;
1309     }
1310
1311     int error = 0;
1312     char *addinfo = 0;
1313     std::string db(sr->databaseNames[0]);
1314     BackendPtr b = get_backend_from_databases(db, &error, &addinfo, odr);
1315     if (error)
1316     {
1317         apdu_res =
1318             odr.create_searchResponse(apdu_req, error, addinfo);
1319         package.response() = apdu_res;
1320         return;
1321     }
1322
1323     b->set_option("setname", "default");
1324
1325     Odr_int hits = 0;
1326     Z_Query *query = sr->query;
1327     WRBUF ccl_wrbuf = 0;
1328     WRBUF pqf_wrbuf = 0;
1329     std::string sru_sortkeys;
1330
1331     if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
1332     {
1333         // RPN
1334         pqf_wrbuf = wrbuf_alloc();
1335         yaz_rpnquery_to_wrbuf(pqf_wrbuf, query->u.type_1);
1336     }
1337     else if (query->which == Z_Query_type_2)
1338     {
1339         // CCL
1340         ccl_wrbuf = wrbuf_alloc();
1341         wrbuf_write(ccl_wrbuf, (const char *) query->u.type_2->buf,
1342                     query->u.type_2->len);
1343     }
1344     else if (query->which == Z_Query_type_104 &&
1345              query->u.type_104->which == Z_External_CQL)
1346     {
1347         // CQL
1348         const char *cql = query->u.type_104->u.cql;
1349         CQL_parser cp = cql_parser_create();
1350         int r = cql_parser_string(cp, cql);
1351         if (r)
1352         {
1353             cql_parser_destroy(cp);
1354             apdu_res =
1355                 odr.create_searchResponse(apdu_req,
1356                                           YAZ_BIB1_MALFORMED_QUERY,
1357                                           "CQL syntax error");
1358             package.response() = apdu_res;
1359             return;
1360         }
1361         struct cql_node *cn = cql_parser_result(cp);
1362         struct cql_node *cn_error = m_p->convert_cql_fields(cn, odr);
1363         if (cn_error)
1364         {
1365             // hopefully we are getting a ptr to a index+relation+term node
1366             addinfo = 0;
1367             if (cn_error->which == CQL_NODE_ST)
1368                 addinfo = cn_error->u.st.index;
1369
1370             apdu_res =
1371                 odr.create_searchResponse(apdu_req,
1372                                           YAZ_BIB1_UNSUPP_USE_ATTRIBUTE,
1373                                           addinfo);
1374             package.response() = apdu_res;
1375             return;
1376         }
1377         char ccl_buf[1024];
1378
1379         r = cql_to_ccl_buf(cn, ccl_buf, sizeof(ccl_buf));
1380         if (r == 0)
1381         {
1382             ccl_wrbuf = wrbuf_alloc();
1383             wrbuf_puts(ccl_wrbuf, ccl_buf);
1384
1385             WRBUF sru_sortkeys_wrbuf = wrbuf_alloc();
1386
1387             cql_sortby_to_sortkeys(cn, wrbuf_vp_puts, sru_sortkeys_wrbuf);
1388
1389             sru_sortkeys.assign(wrbuf_cstr(sru_sortkeys_wrbuf));
1390             wrbuf_destroy(sru_sortkeys_wrbuf);
1391         }
1392         cql_parser_destroy(cp);
1393         if (r)
1394         {
1395             apdu_res =
1396                 odr.create_searchResponse(apdu_req,
1397                                           YAZ_BIB1_MALFORMED_QUERY,
1398                                           "CQL to CCL conversion error");
1399             package.response() = apdu_res;
1400             return;
1401         }
1402     }
1403     else
1404     {
1405         apdu_res =
1406             odr.create_searchResponse(apdu_req, YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
1407         package.response() = apdu_res;
1408         return;
1409     }
1410
1411     if (ccl_wrbuf)
1412     {
1413         // CCL to PQF
1414         assert(pqf_wrbuf == 0);
1415         int cerror, cpos;
1416         struct ccl_rpn_node *cn;
1417         yaz_log(YLOG_LOG, "CCL: %s", wrbuf_cstr(ccl_wrbuf));
1418         cn = ccl_find_str(b->sptr->ccl_bibset, wrbuf_cstr(ccl_wrbuf),
1419                           &cerror, &cpos);
1420         wrbuf_destroy(ccl_wrbuf);
1421         if (!cn)
1422         {
1423             char *addinfo = odr_strdup(odr, ccl_err_msg(cerror));
1424             int z3950_diag = YAZ_BIB1_MALFORMED_QUERY;
1425
1426             switch (cerror)
1427             {
1428             case CCL_ERR_UNKNOWN_QUAL:
1429                 z3950_diag = YAZ_BIB1_UNSUPP_USE_ATTRIBUTE;
1430                 break;
1431             case CCL_ERR_TRUNC_NOT_LEFT:
1432             case CCL_ERR_TRUNC_NOT_RIGHT:
1433             case CCL_ERR_TRUNC_NOT_BOTH:
1434                 z3950_diag = YAZ_BIB1_UNSUPP_TRUNCATION_ATTRIBUTE;
1435                 break;
1436             }
1437             apdu_res =
1438                 odr.create_searchResponse(apdu_req, z3950_diag, addinfo);
1439             package.response() = apdu_res;
1440             return;
1441         }
1442         pqf_wrbuf = wrbuf_alloc();
1443         ccl_pquery(pqf_wrbuf, cn);
1444         ccl_rpn_delete(cn);
1445     }
1446
1447     assert(pqf_wrbuf);
1448     if (b->get_option("sru"))
1449     {
1450         int status = 0;
1451         Z_RPNQuery *zquery;
1452         zquery = p_query_rpn(odr, wrbuf_cstr(pqf_wrbuf));
1453         WRBUF wrb = wrbuf_alloc();
1454
1455         if (!strcmp(b->get_option("sru"), "solr"))
1456         {
1457             solr_transform_t cqlt = solr_transform_create();
1458
1459             status = solr_transform_rpn2solr_wrbuf(cqlt, wrb, zquery);
1460
1461             solr_transform_close(cqlt);
1462         }
1463         else
1464         {
1465             cql_transform_t cqlt = cql_transform_create();
1466
1467             status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery);
1468
1469             cql_transform_close(cqlt);
1470
1471             if (status == 0)
1472                 sort_via_cql(wrb, sru_sortkeys.c_str());
1473         }
1474         if (status == 0)
1475         {
1476             yaz_log(YLOG_LOG, "search CQL: %s", wrbuf_cstr(wrb));
1477             b->search_cql(wrbuf_cstr(wrb), &hits, &error, &addinfo, odr);
1478         }
1479
1480         wrbuf_destroy(wrb);
1481         wrbuf_destroy(pqf_wrbuf);
1482         if (status)
1483         {
1484             apdu_res =
1485                 odr.create_searchResponse(apdu_req, YAZ_BIB1_MALFORMED_QUERY,
1486                                           "can not convert from RPN to CQL/SOLR");
1487             package.response() = apdu_res;
1488             return;
1489         }
1490     }
1491     else
1492     {
1493         sort_pqf_type_7(pqf_wrbuf, sru_sortkeys.c_str());
1494
1495         yaz_log(YLOG_LOG, "search PQF: %s", wrbuf_cstr(pqf_wrbuf));
1496         b->search_pqf(wrbuf_cstr(pqf_wrbuf), &hits, &error, &addinfo, odr);
1497         wrbuf_destroy(pqf_wrbuf);
1498     }
1499
1500     const char *element_set_name = 0;
1501     Odr_int number_to_present = 0;
1502     if (!error)
1503         mp::util::piggyback_sr(sr, hits, number_to_present, &element_set_name);
1504
1505     Odr_int number_of_records_returned = 0;
1506     Z_Records *records = get_records(
1507         0, number_to_present, &error, &addinfo,
1508         &number_of_records_returned, odr, b, sr->preferredRecordSyntax,
1509         element_set_name);
1510     apdu_res = odr.create_searchResponse(apdu_req, error, addinfo);
1511     if (records)
1512     {
1513         apdu_res->u.searchResponse->records = records;
1514         apdu_res->u.searchResponse->numberOfRecordsReturned =
1515             odr_intdup(odr, number_of_records_returned);
1516     }
1517     apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
1518     package.response() = apdu_res;
1519 }
1520
1521 void yf::Zoom::Frontend::handle_present(mp::Package &package)
1522 {
1523     Z_GDU *gdu = package.request().get();
1524     Z_APDU *apdu_req = gdu->u.z3950;
1525     Z_APDU *apdu_res = 0;
1526     Z_PresentRequest *pr = apdu_req->u.presentRequest;
1527
1528     mp::odr odr;
1529     if (!m_backend)
1530     {
1531         package.response() = odr.create_presentResponse(
1532             apdu_req, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST, 0);
1533         return;
1534     }
1535     const char *element_set_name = 0;
1536     Z_RecordComposition *comp = pr->recordComposition;
1537     if (comp && comp->which != Z_RecordComp_simple)
1538     {
1539         package.response() = odr.create_presentResponse(
1540             apdu_req,
1541             YAZ_BIB1_PRESENT_COMP_SPEC_PARAMETER_UNSUPP, 0);
1542         return;
1543     }
1544     if (comp && comp->u.simple->which == Z_ElementSetNames_generic)
1545         element_set_name = comp->u.simple->u.generic;
1546     Odr_int number_of_records_returned = 0;
1547     int error = 0;
1548     char *addinfo = 0;
1549     Z_Records *records = get_records(
1550         *pr->resultSetStartPoint - 1, *pr->numberOfRecordsRequested,
1551         &error, &addinfo, &number_of_records_returned, odr, m_backend,
1552         pr->preferredRecordSyntax, element_set_name);
1553
1554     apdu_res = odr.create_presentResponse(apdu_req, error, addinfo);
1555     if (records)
1556     {
1557         apdu_res->u.presentResponse->records = records;
1558         apdu_res->u.presentResponse->numberOfRecordsReturned =
1559             odr_intdup(odr, number_of_records_returned);
1560     }
1561     package.response() = apdu_res;
1562 }
1563
1564 void yf::Zoom::Frontend::handle_package(mp::Package &package)
1565 {
1566     Z_GDU *gdu = package.request().get();
1567     if (!gdu)
1568         ;
1569     else if (gdu->which == Z_GDU_Z3950)
1570     {
1571         Z_APDU *apdu_req = gdu->u.z3950;
1572         if (apdu_req->which == Z_APDU_initRequest)
1573         {
1574             mp::odr odr;
1575             package.response() = odr.create_close(
1576                 apdu_req,
1577                 Z_Close_protocolError,
1578                 "double init");
1579         }
1580         else if (apdu_req->which == Z_APDU_searchRequest)
1581         {
1582             handle_search(package);
1583         }
1584         else if (apdu_req->which == Z_APDU_presentRequest)
1585         {
1586             handle_present(package);
1587         }
1588         else
1589         {
1590             mp::odr odr;
1591             package.response() = odr.create_close(
1592                 apdu_req,
1593                 Z_Close_protocolError,
1594                 "zoom filter cannot handle this APDU");
1595             package.session().close();
1596         }
1597     }
1598     else
1599     {
1600         package.session().close();
1601     }
1602 }
1603
1604 void yf::Zoom::Impl::process(mp::Package &package)
1605 {
1606     FrontendPtr f = get_frontend(package);
1607     Z_GDU *gdu = package.request().get();
1608
1609     if (f->m_is_virtual)
1610     {
1611         f->handle_package(package);
1612     }
1613     else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1614              Z_APDU_initRequest)
1615     {
1616         Z_InitRequest *req = gdu->u.z3950->u.initRequest;
1617         f->m_init_gdu = gdu;
1618
1619         mp::odr odr;
1620         Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
1621         Z_InitResponse *resp = apdu->u.initResponse;
1622
1623         int i;
1624         static const int masks[] = {
1625             Z_Options_search,
1626             Z_Options_present,
1627             -1
1628         };
1629         for (i = 0; masks[i] != -1; i++)
1630             if (ODR_MASK_GET(req->options, masks[i]))
1631                 ODR_MASK_SET(resp->options, masks[i]);
1632
1633         static const int versions[] = {
1634             Z_ProtocolVersion_1,
1635             Z_ProtocolVersion_2,
1636             Z_ProtocolVersion_3,
1637             -1
1638         };
1639         for (i = 0; versions[i] != -1; i++)
1640             if (ODR_MASK_GET(req->protocolVersion, versions[i]))
1641                 ODR_MASK_SET(resp->protocolVersion, versions[i]);
1642             else
1643                 break;
1644
1645         *resp->preferredMessageSize = *req->preferredMessageSize;
1646         *resp->maximumRecordSize = *req->maximumRecordSize;
1647
1648         package.response() = apdu;
1649         f->m_is_virtual = true;
1650     }
1651     else
1652         package.move();
1653
1654     release_frontend(package);
1655 }
1656
1657
1658 static mp::filter::Base* filter_creator()
1659 {
1660     return new mp::filter::Zoom;
1661 }
1662
1663 extern "C" {
1664     struct metaproxy_1_filter_struct metaproxy_1_filter_zoom = {
1665         0,
1666         "zoom",
1667         filter_creator
1668     };
1669 }
1670
1671
1672 /*
1673  * Local variables:
1674  * c-basic-offset: 4
1675  * c-file-style: "Stroustrup"
1676  * indent-tabs-mode: nil
1677  * End:
1678  * vim: shiftwidth=4 tabstop=8 expandtab
1679  */
1680