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                     if (sptr)
 665                     {
 666                         *error = YAZ_BIB1_UNSPECIFIED_ERROR;
 667                         *addinfo = (char*) odr_malloc(odr, 40 + database.length()),
 668                         sprintf(*addinfo, "multiple records for udb=%s",
 669                                  database.c_str());
 670                         xmlFreeDoc(doc);
 671                         BackendPtr b;
 672                         return b;
 673                     }
 674                     sptr = m_p->parse_torus_record(ptr);
 675                 }
 676             }
 677         }
 678         xmlFreeDoc(doc);
 679     }
 680
 681     if (!sptr)
 682     {
 683         *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 684         *addinfo = odr_strdup(odr, database.c_str());
 685         BackendPtr b;
 686         return b;
 687     }
 688
 689     xsltStylesheetPtr xsp = 0;
 690     if (sptr->transform_xsl_fname.length())
 691     {
 692         const char *path = 0;
 693
 694         if (m_p->xsldir.length())
 695             path = m_p->xsldir.c_str();
 696         else
 697             path = m_p->file_path.c_str();
 698         std::string fname;
 699
 700         char fullpath[1024];
 701         char *cp = yaz_filepath_resolve(sptr->transform_xsl_fname.c_str(),
 702                                         path, 0, fullpath);
 703         if (cp)
 704             fname.assign(cp);
 705         else
 706         {
 707             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 708             *addinfo = (char *)
 709                 odr_malloc(odr, 40 + sptr->transform_xsl_fname.length());
 710             sprintf(*addinfo, "File could not be read: %s",
 711                     sptr->transform_xsl_fname.c_str());
 712             BackendPtr b;
 713             return b;
 714         }
 715         xmlDoc *xsp_doc = xmlParseFile(fname.c_str());
 716         if (!xsp_doc)
 717         {
 718             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 719             *addinfo = (char *) odr_malloc(odr, 40 + fname.length());
 720             sprintf(*addinfo, "xmlParseFile failed. File: %s", fname.c_str());
 721             BackendPtr b;
 722             return b;
 723         }
 724         xsp = xsltParseStylesheetDoc(xsp_doc);
 725         if (!xsp)
 726         {
 727             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 728             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 729             BackendPtr b;
 730             xmlFreeDoc(xsp_doc);
 731             return b;
 732         }
 733     }
 734
 735     m_backend.reset();
 736
 737     BackendPtr b(new Backend(sptr));
 738
 739     b->xsp = xsp;
 740     b->m_frontend_database = database;
 741
 742     if (sptr->query_encoding.length())
 743         b->set_option("rpnCharset", sptr->query_encoding);
 744
 745     b->set_option("timeout", "40");
 746
 747     if (m_p->apdu_log)
 748         b->set_option("apdulog", "1");
 749
 750     if (sptr->piggyback)
 751         b->set_option("count", "10");
 752     b->set_option("piggyback", sptr->piggyback ? "1" : "0");
 753
 754     std::string authentication = sptr->authentication;
 755     std::string proxy = sptr->cfProxy;
 756
 757     const char *param_user = 0;
 758     const char *param_password = 0;
 759     const char *param_proxy = 0;
 760     if (db_args.length())
 761     {
 762         char **names;
 763         char **values;
 764         int i;
 765         int no_parms = yaz_uri_to_array(db_args.c_str(),
 766                                         odr, &names, &values);
 767         for (i = 0; i < no_parms; i++)
 768         {
 769             const char *name = names[i];
 770             const char *value = values[i];
 771             if (!strcmp(name, "user"))
 772                 param_user = value;
 773             else if (!strcmp(name, "password"))
 774                 param_password = value;
 775             else if (!strcmp(name, "proxy"))
 776                 param_proxy = value;
 777             else if (!strcmp(name, "cproxysession"))
 778                 ;
 779             else
 780             {
 781                 BackendPtr notfound;
 782                 char *msg = (char*) odr_malloc(odr, strlen(name) + 30);
 783                 *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 784                 sprintf(msg, "Bad database argument: %s", name);
 785                 *addinfo = msg;
 786                 return notfound;
 787             }
 788         }
 789         if (param_user)
 790         {
 791             authentication = std::string(param_user);
 792             if (param_password)
 793                 authentication += "/" + std::string(param_password);
 794         }
 795         if (param_proxy)
 796             proxy = param_proxy;
 797     }
 798
 799     if (sptr->cfAuth.length())
 800     {
 801         // A CF target
 802         b->set_option("user", sptr->cfAuth);
 803         if (!param_user && !param_password && authentication.length())
 804         {
 805             if (db_args.length())
 806                 db_args += "&";
 807             // no database (auth) args specified already.. and the
 808             // Torus authentication has it.. Generate the args that CF
 809             // understands..
 810             size_t found = authentication.find('/');
 811             if (found != std::string::npos)
 812             {
 813                 db_args += "user=" +
 814                     mp::util::uri_encode(authentication.substr(0, found))
 815                     + "&password=" +
 816                     mp::util::uri_encode(authentication.substr(found+1));
 817             }
 818             else
 819                 db_args += "user=" + mp::util::uri_encode(authentication);
 820         }
 821         if (!param_proxy && proxy.length())
 822         {
 823             if (db_args.length())
 824                 db_args += "&";
 825             db_args += "proxy=" + mp::util::uri_encode(proxy);
 826         }
 827         if (sptr->cfSubDb.length())
 828         {
 829             if (db_args.length())
 830                 db_args += "&";
 831             db_args += "subdatabase=" + mp::util::uri_encode(sptr->cfSubDb);
 832         }
 833     }
 834     else
 835     {
 836         db_args.clear(); // no arguments to be passed (non-CF)
 837
 838         size_t found = authentication.find('/');
 839
 840         if (sptr->sru.length() && found != std::string::npos)
 841         {
 842             b->set_option("user", authentication.substr(0, found));
 843             b->set_option("password", authentication.substr(found+1));
 844         }
 845         else
 846             b->set_option("user", authentication);
 847
 848         if (proxy.length())
 849             b->set_option("proxy", proxy);
 850     }
 851     if (b->sptr->contentConnector.length())
 852     {
 853         char *fname = (char *) xmalloc(m_p->content_tmp_file.length() + 8);
 854         strcpy(fname, m_p->content_tmp_file.c_str());
 855         char *xx = strstr(fname, "XXXXXX");
 856         if (!xx)
 857         {
 858             xx = fname + strlen(fname);
 859             strcat(fname, "XXXXXX");
 860         }
 861         char tmp_char = xx[6];
 862         sprintf(xx, "%06d", ((unsigned) rand()) % 1000000);
 863         xx[6] = tmp_char;
 864
 865         FILE *file = fopen(fname, "w");
 866         if (!file)
 867         {
 868             yaz_log(YLOG_WARN|YLOG_ERRNO, "create %s", fname);
 869             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 870             *addinfo = (char *)  odr_malloc(odr, 40 + strlen(fname));
 871             sprintf(*addinfo, "Could not create %s", fname);
 872             xfree(fname);
 873             BackendPtr backend_null;
 874             return backend_null;
 875         }
 876         b->content_session_id.assign(xx, 6);
 877         WRBUF w = wrbuf_alloc();
 878         wrbuf_puts(w, "#content_proxy\n");
 879         wrbuf_printf(w, "connector: %s\n", b->sptr->contentConnector.c_str());
 880         if (authentication.length())
 881             wrbuf_printf(w, "authentication: %s\n", authentication.c_str());
 882         if (proxy.length())
 883             wrbuf_printf(w, "proxy: %s\n", proxy.c_str());
 884         if (sptr->cfProxy.length())
 885             wrbuf_printf(w, "cfproxy: %s\n", sptr->cfProxy.c_str());
 886
 887         fwrite(wrbuf_buf(w), 1, wrbuf_len(w), file);
 888         fclose(file);
 889         yaz_log(YLOG_LOG, "file %s created\n", fname);
 890         xfree(fname);
 891     }
 892
 893     std::string url;
 894     if (sptr->sru.length())
 895     {
 896         url = "http://" + sptr->target;
 897         b->set_option("sru", sptr->sru);
 898     }
 899     else
 900     {
 901         url = sptr->target;
 902     }
 903     if (db_args.length())
 904         url += "," + db_args;
 905     yaz_log(YLOG_LOG, "url=%s", url.c_str());
 906     b->connect(url, error, addinfo, odr);
 907     if (*error == 0)
 908     {
 909         m_backend = b;
 910     }
 911     return b;
 912 }
 913
 914 Z_Records *yf::Zoom::Frontend::get_records(Odr_int start,
 915                                            Odr_int number_to_present,
 916                                            int *error,
 917                                            char **addinfo,
 918                                            Odr_int *number_of_records_returned,
 919                                            ODR odr,
 920                                            BackendPtr b,
 921                                            Odr_oid *preferredRecordSyntax,
 922                                            const char *element_set_name)
 923 {
 924     *number_of_records_returned = 0;
 925     Z_Records *records = 0;
 926     bool enable_pz2_retrieval = false; // whether target profile is used
 927     bool enable_pz2_transform = false; // whether XSLT is used as well
 928     bool assume_marc8_charset = false;
 929
 930     if (start < 0 || number_to_present <= 0)
 931         return records;
 932
 933     if (number_to_present > 10000)
 934         number_to_present = 10000;
 935
 936     ZOOM_record *recs = (ZOOM_record *)
 937         odr_malloc(odr, (size_t) number_to_present * sizeof(*recs));
 938
 939     char oid_name_str[OID_STR_MAX];
 940     const char *syntax_name = 0;
 941
 942     if (preferredRecordSyntax &&
 943         !oid_oidcmp(preferredRecordSyntax, yaz_oid_recsyn_xml)
 944         && element_set_name)
 945     {
 946         if (!strcmp(element_set_name, m_p->element_transform.c_str()))
 947         {
 948             enable_pz2_retrieval = true;
 949             enable_pz2_transform = true;
 950         }
 951         else if (!strcmp(element_set_name, m_p->element_raw.c_str()))
 952         {
 953             enable_pz2_retrieval = true;
 954         }
 955     }
 956
 957     if (enable_pz2_retrieval)
 958     {
 959         if (b->sptr->request_syntax.length())
 960         {
 961             syntax_name = b->sptr->request_syntax.c_str();
 962             const Odr_oid *syntax_oid =
 963                 yaz_string_to_oid(yaz_oid_std(), CLASS_RECSYN, syntax_name);
 964             if (!oid_oidcmp(syntax_oid, yaz_oid_recsyn_usmarc)
 965                 || !oid_oidcmp(syntax_oid, yaz_oid_recsyn_opac))
 966                 assume_marc8_charset = true;
 967         }
 968     }
 969     else if (preferredRecordSyntax)
 970         syntax_name =
 971             yaz_oid_to_string_buf(preferredRecordSyntax, 0, oid_name_str);
 972
 973     b->set_option("preferredRecordSyntax", syntax_name);
 974
 975     if (enable_pz2_retrieval)
 976     {
 977         element_set_name = 0;
 978         if (b->sptr->element_set.length())
 979             element_set_name = b->sptr->element_set.c_str();
 980     }
 981
 982     b->set_option("elementSetName", element_set_name);
 983
 984     b->present(start, number_to_present, recs, error, addinfo, odr);
 985
 986     int i = 0;
 987     if (!*error)
 988     {
 989         for (i = 0; i < number_to_present; i++)
 990             if (!recs[i])
 991                 break;
 992     }
 993     if (i > 0)
 994     {  // only return records if no error and at least one record
 995         char *odr_database = odr_strdup(odr,
 996                                         b->m_frontend_database.c_str());
 997         Z_NamePlusRecordList *npl = (Z_NamePlusRecordList *)
 998             odr_malloc(odr, sizeof(*npl));
 999         *number_of_records_returned = i;
1000         npl->num_records = i;
1001         npl->records = (Z_NamePlusRecord **)
1002             odr_malloc(odr, i * sizeof(*npl->records));
1003         for (i = 0; i < number_to_present; i++)
1004         {
1005             Z_NamePlusRecord *npr = 0;
1006             const char *addinfo;
1007             int sur_error = ZOOM_record_error(recs[i], 0 /* msg */,
1008                                               &addinfo, 0 /* diagset */);
1009
1010             if (sur_error)
1011             {
1012                 npr = zget_surrogateDiagRec(odr, odr_database, sur_error,
1013                                             addinfo);
1014             }
1015             else if (enable_pz2_retrieval)
1016             {
1017                 char rec_type_str[100];
1018                 const char *record_encoding = 0;
1019
1020                 if (b->sptr->record_encoding.length())
1021                     record_encoding = b->sptr->record_encoding.c_str();
1022                 else if (assume_marc8_charset)
1023                     record_encoding = "marc8";
1024
1025                 strcpy(rec_type_str, b->sptr->use_turbomarc ? "txml" : "xml");
1026                 if (record_encoding)
1027                 {
1028                     strcat(rec_type_str, "; charset=");
1029                     strcat(rec_type_str, record_encoding);
1030                 }
1031
1032                 int rec_len;
1033                 xmlChar *xmlrec_buf = 0;
1034                 const char *rec_buf = ZOOM_record_get(recs[i], rec_type_str,
1035                                                       &rec_len);
1036                 if (!rec_buf && !npr)
1037                 {
1038                     std::string addinfo("ZOOM_record_get failed for type ");
1039
1040                     addinfo += rec_type_str;
1041                     npr = zget_surrogateDiagRec(
1042                         odr, odr_database,
1043                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1044                         addinfo.c_str());
1045                 }
1046
1047                 if (rec_buf && b->xsp && enable_pz2_transform)
1048                 {
1049                     xmlDoc *rec_doc = xmlParseMemory(rec_buf, rec_len);
1050                     if (!rec_doc)
1051                     {
1052                         npr = zget_surrogateDiagRec(
1053                             odr, odr_database,
1054                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1055                             "xml parse failed for record");
1056                     }
1057                     else
1058                     {
1059                         xmlDoc *rec_res =
1060                             xsltApplyStylesheet(b->xsp, rec_doc, 0);
1061
1062                         if (rec_res)
1063                         {
1064                             xsltSaveResultToString(&xmlrec_buf, &rec_len,
1065                                                    rec_res, b->xsp);
1066                             rec_buf = (const char *) xmlrec_buf;
1067
1068                             xmlFreeDoc(rec_res);
1069                         }
1070                         if (!rec_buf)
1071                         {
1072                             std::string addinfo;
1073
1074                             addinfo = "xslt apply failed for "
1075                                 + b->sptr->transform_xsl_fname;
1076                             npr = zget_surrogateDiagRec(
1077                                 odr, odr_database,
1078                                 YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1079                                 addinfo.c_str());
1080                         }
1081                         xmlFreeDoc(rec_doc);
1082                     }
1083                 }
1084
1085                 if (rec_buf)
1086                 {
1087                     xmlDoc *doc = xmlParseMemory(rec_buf, rec_len);
1088                     std::string res =
1089                         mp::xml::url_recipe_handle(doc, b->sptr->urlRecipe);
1090                     if (res.length() && b->content_session_id.length())
1091                     {
1092                         size_t off = res.find_first_of("://");
1093                         if (off != std::string::npos)
1094                         {
1095                             char tmp[1024];
1096                             sprintf(tmp, "%s.%s/",
1097                                     b->content_session_id.c_str(),
1098                                     m_p->content_proxy_server.c_str());
1099                             res.insert(off + 3, tmp);
1100                         }
1101                     }
1102                     if (res.length())
1103                     {
1104                         xmlNode *ptr = xmlDocGetRootElement(doc);
1105                         while (ptr && ptr->type != XML_ELEMENT_NODE)
1106                             ptr = ptr->next;
1107                         xmlNode *c =
1108                             xmlNewChild(ptr, 0, BAD_CAST "generated-url", 0);
1109                         xmlNode * t = xmlNewText(BAD_CAST res.c_str());
1110                         xmlAddChild(c, t);
1111
1112                         if (xmlrec_buf)
1113                             xmlFree(xmlrec_buf);
1114
1115                         xmlDocDumpMemory(doc, &xmlrec_buf, &rec_len);
1116                         rec_buf = (const char *) xmlrec_buf;
1117                     }
1118                     xmlFreeDoc(doc);
1119                 }
1120                 if (!npr)
1121                 {
1122                     if (!rec_buf)
1123                         npr = zget_surrogateDiagRec(
1124                             odr, odr_database,
1125                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1126                             rec_type_str);
1127                     else
1128                     {
1129                         npr = (Z_NamePlusRecord *)
1130                             odr_malloc(odr, sizeof(*npr));
1131                         npr->databaseName = odr_database;
1132                         npr->which = Z_NamePlusRecord_databaseRecord;
1133                         npr->u.databaseRecord =
1134                             z_ext_record_xml(odr, rec_buf, rec_len);
1135                     }
1136                 }
1137                 if (xmlrec_buf)
1138                     xmlFree(xmlrec_buf);
1139             }
1140             else
1141             {
1142                 Z_External *ext =
1143                     (Z_External *) ZOOM_record_get(recs[i], "ext", 0);
1144                 if (ext)
1145                 {
1146                     npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
1147                     npr->databaseName = odr_database;
1148                     npr->which = Z_NamePlusRecord_databaseRecord;
1149                     npr->u.databaseRecord = ext;
1150                 }
1151                 else
1152                 {
1153                     npr = zget_surrogateDiagRec(
1154                         odr, odr_database,
1155                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1156                         "ZOOM_record, type ext");
1157                 }
1158             }
1159             npl->records[i] = npr;
1160         }
1161         records = (Z_Records*) odr_malloc(odr, sizeof(*records));
1162         records->which = Z_Records_DBOSD;
1163         records->u.databaseOrSurDiagnostics = npl;
1164     }
1165     return records;
1166 }
1167
1168 struct cql_node *yf::Zoom::Impl::convert_cql_fields(struct cql_node *cn,
1169                                                     ODR odr)
1170 {
1171     struct cql_node *r = 0;
1172     if (!cn)
1173         return 0;
1174     switch (cn->which)
1175     {
1176     case CQL_NODE_ST:
1177         if (cn->u.st.index)
1178         {
1179             std::map<std::string,std::string>::const_iterator it;
1180             it = fieldmap.find(cn->u.st.index);
1181             if (it == fieldmap.end())
1182                 return cn;
1183             if (it->second.length())
1184                 cn->u.st.index = odr_strdup(odr, it->second.c_str());
1185             else
1186                 cn->u.st.index = 0;
1187         }
1188         break;
1189     case CQL_NODE_BOOL:
1190         r = convert_cql_fields(cn->u.boolean.left, odr);
1191         if (!r)
1192             r = convert_cql_fields(cn->u.boolean.right, odr);
1193         break;
1194     case CQL_NODE_SORT:
1195         r = convert_cql_fields(cn->u.sort.search, odr);
1196         break;
1197     }
1198     return r;
1199 }
1200
1201 static void sort_pqf_type_7(WRBUF pqf_wrbuf, const char *sru_sortkeys)
1202 {
1203     /* sortkey layour: path,schema,ascending,caseSensitive,missingValue */
1204     /* see cql_sortby_to_sortkeys of YAZ. */
1205     char **sortspec;
1206     int num_sortspec = 0;
1207     int i;
1208     NMEM nmem = nmem_create();
1209
1210     if (sru_sortkeys)
1211         nmem_strsplit_blank(nmem, sru_sortkeys, &sortspec, &num_sortspec);
1212     if (num_sortspec > 0)
1213     {
1214         WRBUF w = wrbuf_alloc();
1215         for (i = 0; i < num_sortspec; i++)
1216         {
1217             char **arg;
1218             int num_arg;
1219             int ascending = 1;
1220             nmem_strsplitx(nmem, ",", sortspec[i], &arg, &num_arg, 0);
1221
1222             if (num_arg > 2 && arg[2][0])
1223                 ascending = atoi(arg[2]);
1224
1225             wrbuf_puts(w, "@or @attr 1=");
1226             yaz_encode_pqf_term(w, arg[0], strlen(arg[0]));
1227             wrbuf_printf(w, "@attr 7=%d %d ", ascending ? 1 : 2, i);
1228         }
1229         if (wrbuf_len(w))
1230         {
1231             wrbuf_puts(w, wrbuf_cstr(pqf_wrbuf));
1232             wrbuf_rewind(pqf_wrbuf);
1233             wrbuf_puts(pqf_wrbuf, wrbuf_cstr(w));
1234         }
1235         wrbuf_destroy(w);
1236     }
1237     nmem_destroy(nmem);
1238 }
1239
1240 static void sort_via_cql(WRBUF cql_sortby, const char *sru_sortkeys)
1241 {
1242     /* sortkey layour: path,schema,ascending,caseSensitive,missingValue */
1243     /* see cql_sortby_to_sortkeys of YAZ. */
1244     char **sortspec;
1245     int num_sortspec = 0;
1246     int i;
1247     NMEM nmem = nmem_create();
1248
1249     if (sru_sortkeys)
1250         nmem_strsplit_blank(nmem, sru_sortkeys, &sortspec, &num_sortspec);
1251     if (num_sortspec > 0)
1252     {
1253         WRBUF w = wrbuf_alloc();
1254         for (i = 0; i < num_sortspec; i++)
1255         {
1256             char **arg;
1257             int num_arg;
1258             int ascending = 1;
1259             int case_sensitive = 0;
1260             const char *missing = 0;
1261             nmem_strsplitx(nmem, ",", sortspec[i], &arg, &num_arg, 0);
1262
1263             if (num_arg > 2 && arg[2][0])
1264                 ascending = atoi(arg[2]);
1265             if (num_arg > 3 && arg[3][0])
1266                 case_sensitive = atoi(arg[3]);
1267             if (num_arg > 4 && arg[4][0])
1268                 missing = arg[4];
1269             if (i > 0)
1270                 wrbuf_puts(w, " ");
1271             else
1272                 wrbuf_puts(w, " sortby ");
1273             wrbuf_puts(w, arg[0]);  /* field */
1274             wrbuf_puts(w, "/");
1275             wrbuf_puts(w, ascending ? "ascending" : "descending");
1276             if (case_sensitive)
1277                 wrbuf_puts(w, "/respectCase");
1278             if (missing)
1279             {
1280                 if (!strcmp(missing, "omit"))
1281                     wrbuf_puts(w, "/missingOmit");
1282                 else if (!strcmp(missing, "abort"))
1283                     wrbuf_puts(w, "/missingFail");
1284                 else if (!strcmp(missing, "lowValue"))
1285                     wrbuf_puts(w, "/missingLow");
1286                 else if (!strcmp(missing, "highValue"))
1287                     wrbuf_puts(w, "/missingHigh");
1288             }
1289         }
1290         if (wrbuf_len(w))
1291             wrbuf_puts(cql_sortby, wrbuf_cstr(w));
1292         wrbuf_destroy(w);
1293     }
1294     nmem_destroy(nmem);
1295 }
1296
1297 #if YAZ_VERSIONL < 0x40206
1298 static void wrbuf_vp_puts(const char *buf, void *client_data)
1299 {
1300     WRBUF b = (WRBUF) client_data;
1301     wrbuf_puts(b, buf);
1302 }
1303 #endif
1304
1305 void yf::Zoom::Frontend::handle_search(mp::Package &package)
1306 {
1307     Z_GDU *gdu = package.request().get();
1308     Z_APDU *apdu_req = gdu->u.z3950;
1309     Z_APDU *apdu_res = 0;
1310     mp::odr odr;
1311     Z_SearchRequest *sr = apdu_req->u.searchRequest;
1312     if (sr->num_databaseNames != 1)
1313     {
1314         apdu_res = odr.create_searchResponse(
1315             apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
1316         package.response() = apdu_res;
1317         return;
1318     }
1319
1320     int error = 0;
1321     char *addinfo = 0;
1322     std::string db(sr->databaseNames[0]);
1323     BackendPtr b = get_backend_from_databases(db, &error, &addinfo, odr);
1324     if (error)
1325     {
1326         apdu_res =
1327             odr.create_searchResponse(apdu_req, error, addinfo);
1328         package.response() = apdu_res;
1329         return;
1330     }
1331
1332     b->set_option("setname", "default");
1333
1334     Odr_int hits = 0;
1335     Z_Query *query = sr->query;
1336     WRBUF ccl_wrbuf = 0;
1337     WRBUF pqf_wrbuf = 0;
1338     std::string sru_sortkeys;
1339
1340     if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
1341     {
1342         // RPN
1343         pqf_wrbuf = wrbuf_alloc();
1344         yaz_rpnquery_to_wrbuf(pqf_wrbuf, query->u.type_1);
1345     }
1346     else if (query->which == Z_Query_type_2)
1347     {
1348         // CCL
1349         ccl_wrbuf = wrbuf_alloc();
1350         wrbuf_write(ccl_wrbuf, (const char *) query->u.type_2->buf,
1351                     query->u.type_2->len);
1352     }
1353     else if (query->which == Z_Query_type_104 &&
1354              query->u.type_104->which == Z_External_CQL)
1355     {
1356         // CQL
1357         const char *cql = query->u.type_104->u.cql;
1358         CQL_parser cp = cql_parser_create();
1359         int r = cql_parser_string(cp, cql);
1360         if (r)
1361         {
1362             cql_parser_destroy(cp);
1363             apdu_res =
1364                 odr.create_searchResponse(apdu_req,
1365                                           YAZ_BIB1_MALFORMED_QUERY,
1366                                           "CQL syntax error");
1367             package.response() = apdu_res;
1368             return;
1369         }
1370         struct cql_node *cn = cql_parser_result(cp);
1371         struct cql_node *cn_error = m_p->convert_cql_fields(cn, odr);
1372         if (cn_error)
1373         {
1374             // hopefully we are getting a ptr to a index+relation+term node
1375             addinfo = 0;
1376             if (cn_error->which == CQL_NODE_ST)
1377                 addinfo = cn_error->u.st.index;
1378
1379             apdu_res =
1380                 odr.create_searchResponse(apdu_req,
1381                                           YAZ_BIB1_UNSUPP_USE_ATTRIBUTE,
1382                                           addinfo);
1383             package.response() = apdu_res;
1384             return;
1385         }
1386         char ccl_buf[1024];
1387
1388         r = cql_to_ccl_buf(cn, ccl_buf, sizeof(ccl_buf));
1389         if (r == 0)
1390         {
1391             ccl_wrbuf = wrbuf_alloc();
1392             wrbuf_puts(ccl_wrbuf, ccl_buf);
1393
1394             WRBUF sru_sortkeys_wrbuf = wrbuf_alloc();
1395
1396             cql_sortby_to_sortkeys(cn, wrbuf_vp_puts, sru_sortkeys_wrbuf);
1397
1398             sru_sortkeys.assign(wrbuf_cstr(sru_sortkeys_wrbuf));
1399             wrbuf_destroy(sru_sortkeys_wrbuf);
1400         }
1401         cql_parser_destroy(cp);
1402         if (r)
1403         {
1404             apdu_res =
1405                 odr.create_searchResponse(apdu_req,
1406                                           YAZ_BIB1_MALFORMED_QUERY,
1407                                           "CQL to CCL conversion error");
1408             package.response() = apdu_res;
1409             return;
1410         }
1411     }
1412     else
1413     {
1414         apdu_res =
1415             odr.create_searchResponse(apdu_req, YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
1416         package.response() = apdu_res;
1417         return;
1418     }
1419
1420     if (ccl_wrbuf)
1421     {
1422         // CCL to PQF
1423         assert(pqf_wrbuf == 0);
1424         int cerror, cpos;
1425         struct ccl_rpn_node *cn;
1426         yaz_log(YLOG_LOG, "CCL: %s", wrbuf_cstr(ccl_wrbuf));
1427         cn = ccl_find_str(b->sptr->ccl_bibset, wrbuf_cstr(ccl_wrbuf),
1428                           &cerror, &cpos);
1429         wrbuf_destroy(ccl_wrbuf);
1430         if (!cn)
1431         {
1432             char *addinfo = odr_strdup(odr, ccl_err_msg(cerror));
1433             int z3950_diag = YAZ_BIB1_MALFORMED_QUERY;
1434
1435             switch (cerror)
1436             {
1437             case CCL_ERR_UNKNOWN_QUAL:
1438                 z3950_diag = YAZ_BIB1_UNSUPP_USE_ATTRIBUTE;
1439                 break;
1440             case CCL_ERR_TRUNC_NOT_LEFT:
1441             case CCL_ERR_TRUNC_NOT_RIGHT:
1442             case CCL_ERR_TRUNC_NOT_BOTH:
1443                 z3950_diag = YAZ_BIB1_UNSUPP_TRUNCATION_ATTRIBUTE;
1444                 break;
1445             }
1446             apdu_res =
1447                 odr.create_searchResponse(apdu_req, z3950_diag, addinfo);
1448             package.response() = apdu_res;
1449             return;
1450         }
1451         pqf_wrbuf = wrbuf_alloc();
1452         ccl_pquery(pqf_wrbuf, cn);
1453         ccl_rpn_delete(cn);
1454     }
1455
1456     assert(pqf_wrbuf);
1457     if (b->get_option("sru"))
1458     {
1459         int status = 0;
1460         Z_RPNQuery *zquery;
1461         zquery = p_query_rpn(odr, wrbuf_cstr(pqf_wrbuf));
1462         WRBUF wrb = wrbuf_alloc();
1463
1464         if (!strcmp(b->get_option("sru"), "solr"))
1465         {
1466             solr_transform_t cqlt = solr_transform_create();
1467
1468             status = solr_transform_rpn2solr_wrbuf(cqlt, wrb, zquery);
1469
1470             solr_transform_close(cqlt);
1471         }
1472         else
1473         {
1474             cql_transform_t cqlt = cql_transform_create();
1475
1476             status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery);
1477
1478             cql_transform_close(cqlt);
1479
1480             if (status == 0)
1481                 sort_via_cql(wrb, sru_sortkeys.c_str());
1482         }
1483         if (status == 0)
1484         {
1485             yaz_log(YLOG_LOG, "search CQL: %s", wrbuf_cstr(wrb));
1486             b->search_cql(wrbuf_cstr(wrb), &hits, &error, &addinfo, odr);
1487         }
1488
1489         wrbuf_destroy(wrb);
1490         wrbuf_destroy(pqf_wrbuf);
1491         if (status)
1492         {
1493             apdu_res =
1494                 odr.create_searchResponse(apdu_req, YAZ_BIB1_MALFORMED_QUERY,
1495                                           "can not convert from RPN to CQL/SOLR");
1496             package.response() = apdu_res;
1497             return;
1498         }
1499     }
1500     else
1501     {
1502         sort_pqf_type_7(pqf_wrbuf, sru_sortkeys.c_str());
1503
1504         yaz_log(YLOG_LOG, "search PQF: %s", wrbuf_cstr(pqf_wrbuf));
1505         b->search_pqf(wrbuf_cstr(pqf_wrbuf), &hits, &error, &addinfo, odr);
1506         wrbuf_destroy(pqf_wrbuf);
1507     }
1508
1509     const char *element_set_name = 0;
1510     Odr_int number_to_present = 0;
1511     if (!error)
1512         mp::util::piggyback_sr(sr, hits, number_to_present, &element_set_name);
1513
1514     Odr_int number_of_records_returned = 0;
1515     Z_Records *records = get_records(
1516         0, number_to_present, &error, &addinfo,
1517         &number_of_records_returned, odr, b, sr->preferredRecordSyntax,
1518         element_set_name);
1519     apdu_res = odr.create_searchResponse(apdu_req, error, addinfo);
1520     if (records)
1521     {
1522         apdu_res->u.searchResponse->records = records;
1523         apdu_res->u.searchResponse->numberOfRecordsReturned =
1524             odr_intdup(odr, number_of_records_returned);
1525     }
1526     apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
1527     package.response() = apdu_res;
1528 }
1529
1530 void yf::Zoom::Frontend::handle_present(mp::Package &package)
1531 {
1532     Z_GDU *gdu = package.request().get();
1533     Z_APDU *apdu_req = gdu->u.z3950;
1534     Z_APDU *apdu_res = 0;
1535     Z_PresentRequest *pr = apdu_req->u.presentRequest;
1536
1537     mp::odr odr;
1538     if (!m_backend)
1539     {
1540         package.response() = odr.create_presentResponse(
1541             apdu_req, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST, 0);
1542         return;
1543     }
1544     const char *element_set_name = 0;
1545     Z_RecordComposition *comp = pr->recordComposition;
1546     if (comp && comp->which != Z_RecordComp_simple)
1547     {
1548         package.response() = odr.create_presentResponse(
1549             apdu_req,
1550             YAZ_BIB1_PRESENT_COMP_SPEC_PARAMETER_UNSUPP, 0);
1551         return;
1552     }
1553     if (comp && comp->u.simple->which == Z_ElementSetNames_generic)
1554         element_set_name = comp->u.simple->u.generic;
1555     Odr_int number_of_records_returned = 0;
1556     int error = 0;
1557     char *addinfo = 0;
1558     Z_Records *records = get_records(
1559         *pr->resultSetStartPoint - 1, *pr->numberOfRecordsRequested,
1560         &error, &addinfo, &number_of_records_returned, odr, m_backend,
1561         pr->preferredRecordSyntax, element_set_name);
1562
1563     apdu_res = odr.create_presentResponse(apdu_req, error, addinfo);
1564     if (records)
1565     {
1566         apdu_res->u.presentResponse->records = records;
1567         apdu_res->u.presentResponse->numberOfRecordsReturned =
1568             odr_intdup(odr, number_of_records_returned);
1569     }
1570     package.response() = apdu_res;
1571 }
1572
1573 void yf::Zoom::Frontend::handle_package(mp::Package &package)
1574 {
1575     Z_GDU *gdu = package.request().get();
1576     if (!gdu)
1577         ;
1578     else if (gdu->which == Z_GDU_Z3950)
1579     {
1580         Z_APDU *apdu_req = gdu->u.z3950;
1581         if (apdu_req->which == Z_APDU_initRequest)
1582         {
1583             mp::odr odr;
1584             package.response() = odr.create_close(
1585                 apdu_req,
1586                 Z_Close_protocolError,
1587                 "double init");
1588         }
1589         else if (apdu_req->which == Z_APDU_searchRequest)
1590         {
1591             handle_search(package);
1592         }
1593         else if (apdu_req->which == Z_APDU_presentRequest)
1594         {
1595             handle_present(package);
1596         }
1597         else
1598         {
1599             mp::odr odr;
1600             package.response() = odr.create_close(
1601                 apdu_req,
1602                 Z_Close_protocolError,
1603                 "zoom filter cannot handle this APDU");
1604             package.session().close();
1605         }
1606     }
1607     else
1608     {
1609         package.session().close();
1610     }
1611 }
1612
1613 void yf::Zoom::Impl::process(mp::Package &package)
1614 {
1615     FrontendPtr f = get_frontend(package);
1616     Z_GDU *gdu = package.request().get();
1617
1618     if (f->m_is_virtual)
1619     {
1620         f->handle_package(package);
1621     }
1622     else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1623              Z_APDU_initRequest)
1624     {
1625         Z_InitRequest *req = gdu->u.z3950->u.initRequest;
1626         f->m_init_gdu = gdu;
1627
1628         mp::odr odr;
1629         Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
1630         Z_InitResponse *resp = apdu->u.initResponse;
1631
1632         int i;
1633         static const int masks[] = {
1634             Z_Options_search,
1635             Z_Options_present,
1636             -1
1637         };
1638         for (i = 0; masks[i] != -1; i++)
1639             if (ODR_MASK_GET(req->options, masks[i]))
1640                 ODR_MASK_SET(resp->options, masks[i]);
1641
1642         static const int versions[] = {
1643             Z_ProtocolVersion_1,
1644             Z_ProtocolVersion_2,
1645             Z_ProtocolVersion_3,
1646             -1
1647         };
1648         for (i = 0; versions[i] != -1; i++)
1649             if (ODR_MASK_GET(req->protocolVersion, versions[i]))
1650                 ODR_MASK_SET(resp->protocolVersion, versions[i]);
1651             else
1652                 break;
1653
1654         *resp->preferredMessageSize = *req->preferredMessageSize;
1655         *resp->maximumRecordSize = *req->maximumRecordSize;
1656
1657         package.response() = apdu;
1658         f->m_is_virtual = true;
1659     }
1660     else
1661         package.move();
1662
1663     release_frontend(package);
1664 }
1665
1666
1667 static mp::filter::Base* filter_creator()
1668 {
1669     return new mp::filter::Zoom;
1670 }
1671
1672 extern "C" {
1673     struct metaproxy_1_filter_struct metaproxy_1_filter_zoom = {
1674         0,
1675         "zoom",
1676         filter_creator
1677     };
1678 }
1679
1680
1681 /*
1682  * Local variables:
1683  * c-basic-offset: 4
1684  * c-file-style: "Stroustrup"
1685  * indent-tabs-mode: nil
1686  * End:
1687  * vim: shiftwidth=4 tabstop=8 expandtab
1688  */
1689