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         struct Zoom::Searchable : boost::noncopyable {
  56             std::string authentication;
  57             std::string cfAuth;
  58             std::string cfProxy;
  59             std::string cfSubDb;
  60             std::string udb;
  61             std::string target;
  62             std::string query_encoding;
  63             std::string sru;
  64             std::string request_syntax;
  65             std::string element_set;
  66             std::string record_encoding;
  67             std::string transform_xsl_fname;
  68             std::string urlRecipe;
  69             std::string contentConnector;
  70             bool use_turbomarc;
  71             bool piggyback;
  72             CCL_bibset ccl_bibset;
  73             Searchable(CCL_bibset base);
  74             ~Searchable();
  75         };
  76         class Zoom::Backend : boost::noncopyable {
  77             friend class Impl;
  78             friend class Frontend;
  79             std::string zurl;
  80             ZOOM_connection m_connection;
  81             ZOOM_resultset m_resultset;
  82             std::string m_frontend_database;
  83             SearchablePtr sptr;
  84             xsltStylesheetPtr xsp;
  85             std::string content_session_id;
  86         public:
  87             Backend(SearchablePtr sptr);
  88             ~Backend();
  89             void connect(std::string zurl, int *error, char **addinfo,
  90                          ODR odr);
  91             void search_pqf(const char *pqf, Odr_int *hits,
  92                             int *error, char **addinfo, ODR odr);
  93             void search_cql(const char *cql, Odr_int *hits,
  94                             int *error, char **addinfo, ODR odr);
  95             void present(Odr_int start, Odr_int number, ZOOM_record *recs,
  96                          int *error, char **addinfo, ODR odr);
  97             void set_option(const char *name, const char *value);
  98             void set_option(const char *name, std::string value);
  99             const char *get_option(const char *name);
 100             void get_zoom_error(int *error, char **addinfo, ODR odr);
 101         };
 102         class Zoom::Frontend : boost::noncopyable {
 103             friend class Impl;
 104             Impl *m_p;
 105             bool m_is_virtual;
 106             bool m_in_use;
 107             yazpp_1::GDU m_init_gdu;
 108             BackendPtr m_backend;
 109             void handle_package(mp::Package &package);
 110             void handle_search(mp::Package &package);
 111             void handle_present(mp::Package &package);
 112             BackendPtr get_backend_from_databases(std::string &database,
 113                                                   int *error,
 114                                                   char **addinfo,
 115                                                   ODR odr);
 116             Z_Records *get_records(Odr_int start,
 117                                    Odr_int number_to_present,
 118                                    int *error,
 119                                    char **addinfo,
 120                                    Odr_int *number_of_records_returned,
 121                                    ODR odr, BackendPtr b,
 122                                    Odr_oid *preferredRecordSyntax,
 123                                    const char *element_set_name);
 124         public:
 125             Frontend(Impl *impl);
 126             ~Frontend();
 127         };
 128         class Zoom::Impl {
 129             friend class Frontend;
 130         public:
 131             Impl();
 132             ~Impl();
 133             void process(metaproxy_1::Package & package);
 134             void configure(const xmlNode * ptr, bool test_only,
 135                            const char *path);
 136         private:
 137             void configure_local_records(const xmlNode * ptr, bool test_only);
 138             FrontendPtr get_frontend(mp::Package &package);
 139             void release_frontend(mp::Package &package);
 140             SearchablePtr parse_torus_record(const xmlNode *ptr);
 141             struct cql_node *convert_cql_fields(struct cql_node *cn, ODR odr);
 142             std::map<mp::Session, FrontendPtr> m_clients;
 143             boost::mutex m_mutex;
 144             boost::condition m_cond_session_ready;
 145             std::string torus_url;
 146             std::map<std::string,std::string> fieldmap;
 147             std::string xsldir;
 148             std::string file_path;
 149             std::string content_proxy_server;
 150             std::string content_tmp_file;
 151             bool apdu_log;
 152             CCL_bibset bibset;
 153             std::string element_transform;
 154             std::string element_raw;
 155             std::map<std::string,SearchablePtr> s_map;
 156         };
 157     }
 158 }
 159
 160 // define Pimpl wrapper forwarding to Impl
 161
 162 yf::Zoom::Zoom() : m_p(new Impl)
 163 {
 164 }
 165
 166 yf::Zoom::~Zoom()
 167 {  // must have a destructor because of boost::scoped_ptr
 168 }
 169
 170 void yf::Zoom::configure(const xmlNode *xmlnode, bool test_only,
 171                          const char *path)
 172 {
 173     m_p->configure(xmlnode, test_only, path);
 174 }
 175
 176 void yf::Zoom::process(mp::Package &package) const
 177 {
 178     m_p->process(package);
 179 }
 180
 181
 182 // define Implementation stuff
 183
 184 yf::Zoom::Backend::Backend(SearchablePtr ptr) : sptr(ptr)
 185 {
 186     m_connection = ZOOM_connection_create(0);
 187     m_resultset = 0;
 188     xsp = 0;
 189 }
 190
 191 yf::Zoom::Backend::~Backend()
 192 {
 193     if (xsp)
 194         xsltFreeStylesheet(xsp);
 195     ZOOM_connection_destroy(m_connection);
 196     ZOOM_resultset_destroy(m_resultset);
 197 }
 198
 199
 200 void yf::Zoom::Backend::get_zoom_error(int *error, char **addinfo,
 201                                        ODR odr)
 202 {
 203     const char *msg = 0;
 204     const char *zoom_addinfo = 0;
 205     const char *dset = 0;
 206     *error = ZOOM_connection_error_x(m_connection, &msg, &zoom_addinfo, &dset);
 207     if (*error)
 208     {
 209         if (*error >= ZOOM_ERROR_CONNECT)
 210         {
 211             // turn ZOOM diagnostic into a Bib-1 2: with addinfo=zoom err msg
 212             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 213             *addinfo = (char *) odr_malloc(
 214                 odr, 20 + strlen(msg) +
 215                 (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 216             strcpy(*addinfo, msg);
 217             if (zoom_addinfo)
 218             {
 219                 strcat(*addinfo, ": ");
 220                 strcat(*addinfo, zoom_addinfo);
 221                 strcat(*addinfo, " ");
 222             }
 223         }
 224         else
 225         {
 226             if (dset && !strcmp(dset, "info:srw/diagnostic/1"))
 227                 *error = yaz_diag_srw_to_bib1(*error);
 228             *addinfo = (char *) odr_malloc(
 229                 odr, 20 + (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 230             **addinfo = '\0';
 231             if (zoom_addinfo && *zoom_addinfo)
 232             {
 233                 strcpy(*addinfo, zoom_addinfo);
 234                 strcat(*addinfo, " ");
 235             }
 236             strcat(*addinfo, "(backend)");
 237         }
 238     }
 239 }
 240
 241 void yf::Zoom::Backend::connect(std::string zurl,
 242                                 int *error, char **addinfo,
 243                                 ODR odr)
 244 {
 245     ZOOM_connection_connect(m_connection, zurl.c_str(), 0);
 246     get_zoom_error(error, addinfo, odr);
 247 }
 248
 249 void yf::Zoom::Backend::search_pqf(const char *pqf, Odr_int *hits,
 250                                    int *error, char **addinfo, ODR odr)
 251 {
 252     m_resultset = ZOOM_connection_search_pqf(m_connection, pqf);
 253     get_zoom_error(error, addinfo, odr);
 254     if (*error == 0)
 255         *hits = ZOOM_resultset_size(m_resultset);
 256     else
 257         *hits = 0;
 258 }
 259
 260 void yf::Zoom::Backend::search_cql(const char *cql, Odr_int *hits,
 261                                    int *error, char **addinfo, ODR odr)
 262 {
 263     ZOOM_query q = ZOOM_query_create();
 264
 265     ZOOM_query_cql(q, cql);
 266
 267     m_resultset = ZOOM_connection_search(m_connection, q);
 268     ZOOM_query_destroy(q);
 269     get_zoom_error(error, addinfo, odr);
 270     if (*error == 0)
 271         *hits = ZOOM_resultset_size(m_resultset);
 272     else
 273         *hits = 0;
 274 }
 275
 276 void yf::Zoom::Backend::present(Odr_int start, Odr_int number,
 277                                 ZOOM_record *recs,
 278                                 int *error, char **addinfo, ODR odr)
 279 {
 280     ZOOM_resultset_records(m_resultset, recs, start, number);
 281     get_zoom_error(error, addinfo, odr);
 282 }
 283
 284 void yf::Zoom::Backend::set_option(const char *name, const char *value)
 285 {
 286     ZOOM_connection_option_set(m_connection, name, value);
 287     if (m_resultset)
 288         ZOOM_resultset_option_set(m_resultset, name, value);
 289 }
 290
 291 void yf::Zoom::Backend::set_option(const char *name, std::string value)
 292 {
 293     set_option(name, value.c_str());
 294 }
 295
 296 const char *yf::Zoom::Backend::get_option(const char *name)
 297 {
 298     return ZOOM_connection_option_get(m_connection, name);
 299 }
 300
 301 yf::Zoom::Searchable::Searchable(CCL_bibset base)
 302 {
 303     piggyback = true;
 304     use_turbomarc = true;
 305     ccl_bibset = ccl_qual_dup(base);
 306 }
 307
 308 yf::Zoom::Searchable::~Searchable()
 309 {
 310     ccl_qual_rm(&ccl_bibset);
 311 }
 312
 313 yf::Zoom::Frontend::Frontend(Impl *impl) :
 314     m_p(impl), m_is_virtual(false), m_in_use(true)
 315 {
 316 }
 317
 318 yf::Zoom::Frontend::~Frontend()
 319 {
 320 }
 321
 322 yf::Zoom::FrontendPtr yf::Zoom::Impl::get_frontend(mp::Package &package)
 323 {
 324     boost::mutex::scoped_lock lock(m_mutex);
 325
 326     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 327
 328     while(true)
 329     {
 330         it = m_clients.find(package.session());
 331         if (it == m_clients.end())
 332             break;
 333
 334         if (!it->second->m_in_use)
 335         {
 336             it->second->m_in_use = true;
 337             return it->second;
 338         }
 339         m_cond_session_ready.wait(lock);
 340     }
 341     FrontendPtr f(new Frontend(this));
 342     m_clients[package.session()] = f;
 343     f->m_in_use = true;
 344     return f;
 345 }
 346
 347 void yf::Zoom::Impl::release_frontend(mp::Package &package)
 348 {
 349     boost::mutex::scoped_lock lock(m_mutex);
 350     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 351
 352     it = m_clients.find(package.session());
 353     if (it != m_clients.end())
 354     {
 355         if (package.session().is_closed())
 356         {
 357             m_clients.erase(it);
 358         }
 359         else
 360         {
 361             it->second->m_in_use = false;
 362         }
 363         m_cond_session_ready.notify_all();
 364     }
 365 }
 366
 367 yf::Zoom::Impl::Impl() :
 368     apdu_log(false), element_transform("pz2") , element_raw("raw")
 369 {
 370     bibset = ccl_qual_mk();
 371
 372     srand(time(0));
 373 }
 374
 375 yf::Zoom::Impl::~Impl()
 376 {
 377     ccl_qual_rm(&bibset);
 378 }
 379
 380 yf::Zoom::SearchablePtr yf::Zoom::Impl::parse_torus_record(const xmlNode *ptr)
 381 {
 382     Zoom::SearchablePtr s(new Searchable(bibset));
 383
 384     for (ptr = ptr->children; ptr; ptr = ptr->next)
 385     {
 386         if (ptr->type != XML_ELEMENT_NODE)
 387             continue;
 388         if (!strcmp((const char *) ptr->name, "layer"))
 389             ptr = ptr->children;
 390         else if (!strcmp((const char *) ptr->name,
 391                          "authentication"))
 392         {
 393             s->authentication = mp::xml::get_text(ptr);
 394         }
 395         else if (!strcmp((const char *) ptr->name,
 396                          "cfAuth"))
 397         {
 398             s->cfAuth = mp::xml::get_text(ptr);
 399         }
 400         else if (!strcmp((const char *) ptr->name,
 401                          "cfProxy"))
 402         {
 403             s->cfProxy = mp::xml::get_text(ptr);
 404         }
 405         else if (!strcmp((const char *) ptr->name,
 406                          "cfSubDb"))
 407         {
 408             s->cfSubDb = mp::xml::get_text(ptr);
 409         }
 410         else if (!strcmp((const char *) ptr->name,
 411                          "contentConnector"))
 412         {
 413             s->contentConnector = mp::xml::get_text(ptr);
 414         }
 415         else if (!strcmp((const char *) ptr->name, "udb"))
 416         {
 417             s->udb = mp::xml::get_text(ptr);
 418         }
 419         else if (!strcmp((const char *) ptr->name, "zurl"))
 420         {
 421             s->target = mp::xml::get_text(ptr);
 422         }
 423         else if (!strcmp((const char *) ptr->name, "sru"))
 424         {
 425             s->sru = mp::xml::get_text(ptr);
 426         }
 427         else if (!strcmp((const char *) ptr->name,
 428                          "queryEncoding"))
 429         {
 430             s->query_encoding = mp::xml::get_text(ptr);
 431         }
 432         else if (!strcmp((const char *) ptr->name,
 433                          "piggyback"))
 434         {
 435             s->piggyback = mp::xml::get_bool(ptr, true);
 436         }
 437         else if (!strcmp((const char *) ptr->name,
 438                          "requestSyntax"))
 439         {
 440             s->request_syntax = mp::xml::get_text(ptr);
 441         }
 442         else if (!strcmp((const char *) ptr->name,
 443                          "elementSet"))
 444         {
 445             s->element_set = mp::xml::get_text(ptr);
 446         }
 447         else if (!strcmp((const char *) ptr->name,
 448                          "recordEncoding"))
 449         {
 450             s->record_encoding = mp::xml::get_text(ptr);
 451         }
 452         else if (!strcmp((const char *) ptr->name,
 453                          "transform"))
 454         {
 455             s->transform_xsl_fname = mp::xml::get_text(ptr);
 456         }
 457         else if (!strcmp((const char *) ptr->name,
 458                          "urlRecipe"))
 459         {
 460             s->urlRecipe = mp::xml::get_text(ptr);
 461         }
 462         else if (!strcmp((const char *) ptr->name,
 463                          "useTurboMarc"))
 464         {
 465             ; // useTurboMarc is ignored
 466         }
 467         else if (!strncmp((const char *) ptr->name,
 468                           "cclmap_", 7))
 469         {
 470             std::string value = mp::xml::get_text(ptr);
 471             ccl_qual_fitem(s->ccl_bibset, value.c_str(),
 472                            (const char *) ptr->name + 7);
 473         }
 474     }
 475     return s;
 476 }
 477
 478 void yf::Zoom::Impl::configure_local_records(const xmlNode *ptr, bool test_only)
 479 {
 480     while (ptr && ptr->type != XML_ELEMENT_NODE)
 481         ptr = ptr->next;
 482
 483     if (ptr)
 484     {
 485         if (!strcmp((const char *) ptr->name, "records"))
 486         {
 487             for (ptr = ptr->children; ptr; ptr = ptr->next)
 488             {
 489                 if (ptr->type != XML_ELEMENT_NODE)
 490                     continue;
 491                 if (!strcmp((const char *) ptr->name, "record"))
 492                 {
 493                     SearchablePtr s = parse_torus_record(ptr);
 494                     if (s)
 495                     {
 496                         std::string udb = s->udb;
 497                         if (udb.length())
 498                             s_map[s->udb] = s;
 499                         else
 500                         {
 501                             throw mp::filter::FilterException
 502                                 ("No udb for local torus record");
 503                         }
 504                     }
 505                 }
 506                 else
 507                 {
 508                     throw mp::filter::FilterException
 509                         ("Bad element "
 510                          + std::string((const char *) ptr->name)
 511                          + " in zoom filter inside element "
 512                          "<torus><records>");
 513                 }
 514             }
 515         }
 516         else
 517         {
 518             throw mp::filter::FilterException
 519                 ("Bad element "
 520                  + std::string((const char *) ptr->name)
 521                  + " in zoom filter inside element <torus>");
 522         }
 523     }
 524 }
 525
 526 void yf::Zoom::Impl::configure(const xmlNode *ptr, bool test_only,
 527                                const char *path)
 528 {
 529     content_tmp_file = "/tmp/cf.XXXXXX.p";
 530     if (path && *path)
 531     {
 532         file_path = path;
 533     }
 534     for (ptr = ptr->children; ptr; ptr = ptr->next)
 535     {
 536         if (ptr->type != XML_ELEMENT_NODE)
 537             continue;
 538         else if (!strcmp((const char *) ptr->name, "torus"))
 539         {
 540             const struct _xmlAttr *attr;
 541             for (attr = ptr->properties; attr; attr = attr->next)
 542             {
 543                 if (!strcmp((const char *) attr->name, "url"))
 544                     torus_url = mp::xml::get_text(attr->children);
 545                 else if (!strcmp((const char *) attr->name, "xsldir"))
 546                     xsldir = mp::xml::get_text(attr->children);
 547                 else if (!strcmp((const char *) attr->name, "element_transform"))
 548                     element_transform = mp::xml::get_text(attr->children);
 549                 else if (!strcmp((const char *) attr->name, "element_raw"))
 550                     element_raw = mp::xml::get_text(attr->children);
 551                 else
 552                     throw mp::filter::FilterException(
 553                         "Bad attribute " + std::string((const char *)
 554                                                        attr->name));
 555             }
 556             configure_local_records(ptr->children, test_only);
 557         }
 558         else if (!strcmp((const char *) ptr->name, "cclmap"))
 559         {
 560             const char *addinfo = 0;
 561             ccl_xml_config(bibset, ptr, &addinfo);
 562         }
 563         else if (!strcmp((const char *) ptr->name, "fieldmap"))
 564         {
 565             const struct _xmlAttr *attr;
 566             std::string ccl_field;
 567             std::string cql_field;
 568             for (attr = ptr->properties; attr; attr = attr->next)
 569             {
 570                 if (!strcmp((const char *) attr->name, "ccl"))
 571                     ccl_field = mp::xml::get_text(attr->children);
 572                 else if (!strcmp((const char *) attr->name, "cql"))
 573                     cql_field = mp::xml::get_text(attr->children);
 574                 else
 575                     throw mp::filter::FilterException(
 576                         "Bad attribute " + std::string((const char *)
 577                                                        attr->name));
 578             }
 579             if (cql_field.length())
 580                 fieldmap[cql_field] = ccl_field;
 581         }
 582         else if (!strcmp((const char *) ptr->name, "contentProxy"))
 583         {
 584             const struct _xmlAttr *attr;
 585             for (attr = ptr->properties; attr; attr = attr->next)
 586             {
 587                 if (!strcmp((const char *) attr->name, "server"))
 588                     content_proxy_server = mp::xml::get_text(attr->children);
 589                 else if (!strcmp((const char *) attr->name, "tmp_file"))
 590                     content_tmp_file = mp::xml::get_text(attr->children);
 591                 else
 592                     throw mp::filter::FilterException(
 593                         "Bad attribute " + std::string((const char *)
 594                                                        attr->name));
 595             }
 596         }
 597         else if (!strcmp((const char *) ptr->name, "log"))
 598         {
 599             const struct _xmlAttr *attr;
 600             for (attr = ptr->properties; attr; attr = attr->next)
 601             {
 602                 if (!strcmp((const char *) attr->name, "apdu"))
 603                     apdu_log = mp::xml::get_bool(attr->children, false);
 604                 else
 605                     throw mp::filter::FilterException(
 606                         "Bad attribute " + std::string((const char *)
 607                                                        attr->name));
 608             }
 609         }
 610         else
 611         {
 612             throw mp::filter::FilterException
 613                 ("Bad element "
 614                  + std::string((const char *) ptr->name)
 615                  + " in zoom filter");
 616         }
 617     }
 618 }
 619
 620 yf::Zoom::BackendPtr yf::Zoom::Frontend::get_backend_from_databases(
 621     std::string &database, int *error, char **addinfo, ODR odr)
 622 {
 623     std::list<BackendPtr>::const_iterator map_it;
 624     if (m_backend && m_backend->m_frontend_database == database)
 625         return m_backend;
 626
 627     std::string db_args;
 628     std::string torus_db;
 629     size_t db_arg_pos = database.find(',');
 630     if (db_arg_pos != std::string::npos)
 631     {
 632         torus_db = database.substr(0, db_arg_pos);
 633         db_args = database.substr(db_arg_pos + 1);
 634     }
 635     else
 636         torus_db = database;
 637
 638     SearchablePtr sptr;
 639
 640     std::map<std::string,SearchablePtr>::iterator it;
 641     it = m_p->s_map.find(torus_db);
 642     if (it != m_p->s_map.end())
 643         sptr = it->second;
 644     else
 645     {
 646         xmlDoc *doc = mp::get_searchable(m_p->torus_url, torus_db);
 647         if (!doc)
 648         {
 649             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 650             *addinfo = odr_strdup(odr, database.c_str());
 651             BackendPtr b;
 652             return b;
 653         }
 654         const xmlNode *ptr = xmlDocGetRootElement(doc);
 655         if (ptr)
 656         {   // presumably ptr is a records element node
 657             // parse first record in document
 658             for (ptr = ptr->children; ptr; ptr = ptr->next)
 659             {
 660                 if (ptr->type == XML_ELEMENT_NODE
 661                     && !strcmp((const char *) ptr->name, "record"))
 662                 {
 663                     sptr = m_p->parse_torus_record(ptr);
 664                     break;
 665                 }
 666             }
 667         }
 668         xmlFreeDoc(doc);
 669     }
 670
 671     if (!sptr)
 672     {
 673         *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 674         *addinfo = odr_strdup(odr, database.c_str());
 675         BackendPtr b;
 676         return b;
 677     }
 678
 679     xsltStylesheetPtr xsp = 0;
 680     if (sptr->transform_xsl_fname.length())
 681     {
 682         const char *path = 0;
 683
 684         if (m_p->xsldir.length())
 685             path = m_p->xsldir.c_str();
 686         else
 687             path = m_p->file_path.c_str();
 688         std::string fname;
 689
 690         char fullpath[1024];
 691         char *cp = yaz_filepath_resolve(sptr->transform_xsl_fname.c_str(),
 692                                         path, 0, fullpath);
 693         if (cp)
 694             fname.assign(cp);
 695         else
 696         {
 697             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 698             *addinfo = (char *)
 699                 odr_malloc(odr, 40 + sptr->transform_xsl_fname.length());
 700             sprintf(*addinfo, "File could not be read: %s",
 701                     sptr->transform_xsl_fname.c_str());
 702             BackendPtr b;
 703             return b;
 704         }
 705         xmlDoc *xsp_doc = xmlParseFile(fname.c_str());
 706         if (!xsp_doc)
 707         {
 708             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 709             *addinfo = (char *) odr_malloc(odr, 40 + fname.length());
 710             sprintf(*addinfo, "xmlParseFile failed. File: %s", fname.c_str());
 711             BackendPtr b;
 712             return b;
 713         }
 714         xsp = xsltParseStylesheetDoc(xsp_doc);
 715         if (!xsp)
 716         {
 717             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 718             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 719             BackendPtr b;
 720             xmlFreeDoc(xsp_doc);
 721             return b;
 722         }
 723     }
 724
 725     m_backend.reset();
 726
 727     BackendPtr b(new Backend(sptr));
 728
 729     b->xsp = xsp;
 730     b->m_frontend_database = database;
 731
 732     if (sptr->query_encoding.length())
 733         b->set_option("rpnCharset", sptr->query_encoding);
 734
 735     b->set_option("timeout", "40");
 736
 737     if (m_p->apdu_log)
 738         b->set_option("apdulog", "1");
 739
 740     if (sptr->piggyback)
 741         b->set_option("count", "10");
 742     b->set_option("piggyback", sptr->piggyback ? "1" : "0");
 743
 744     std::string authentication = sptr->authentication;
 745     std::string proxy = sptr->cfProxy;
 746
 747     const char *param_user = 0;
 748     const char *param_password = 0;
 749     const char *param_proxy = 0;
 750     if (db_args.length())
 751     {
 752         char **names;
 753         char **values;
 754         int i;
 755         int no_parms = yaz_uri_to_array(db_args.c_str(),
 756                                         odr, &names, &values);
 757         for (i = 0; i < no_parms; i++)
 758         {
 759             const char *name = names[i];
 760             const char *value = values[i];
 761             if (!strcmp(name, "user"))
 762                 param_user = value;
 763             else if (!strcmp(name, "password"))
 764                 param_password = value;
 765             else if (!strcmp(name, "proxy"))
 766                 param_proxy = value;
 767             else if (!strcmp(name, "cproxysession"))
 768                 ;
 769             else
 770             {
 771                 BackendPtr notfound;
 772                 char *msg = (char*) odr_malloc(odr, strlen(name) + 30);
 773                 *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 774                 sprintf(msg, "Bad database argument: %s", name);
 775                 *addinfo = msg;
 776                 return notfound;
 777             }
 778         }
 779         if (param_user)
 780         {
 781             authentication = std::string(param_user);
 782             if (param_password)
 783                 authentication += "/" + std::string(param_password);
 784         }
 785         if (param_proxy)
 786             proxy = param_proxy;
 787     }
 788
 789     if (sptr->cfAuth.length())
 790     {
 791         // A CF target
 792         b->set_option("user", sptr->cfAuth);
 793         if (!param_user && !param_password && authentication.length())
 794         {
 795             if (db_args.length())
 796                 db_args += "&";
 797             // no database (auth) args specified already.. and the
 798             // Torus authentication has it.. Generate the args that CF
 799             // understands..
 800             size_t found = authentication.find('/');
 801             if (found != std::string::npos)
 802             {
 803                 db_args += "user=" +
 804                     mp::util::uri_encode(authentication.substr(0, found))
 805                     + "&password=" +
 806                     mp::util::uri_encode(authentication.substr(found+1));
 807             }
 808             else
 809                 db_args += "user=" + mp::util::uri_encode(authentication);
 810         }
 811         if (!param_proxy && proxy.length())
 812         {
 813             if (db_args.length())
 814                 db_args += "&";
 815             db_args += "proxy=" + mp::util::uri_encode(proxy);
 816         }
 817         if (sptr->cfSubDb.length())
 818         {
 819             if (db_args.length())
 820                 db_args += "&";
 821             db_args += "subdatabase=" + mp::util::uri_encode(sptr->cfSubDb);
 822         }
 823     }
 824     else
 825     {
 826         db_args.clear(); // no arguments to be passed (non-CF)
 827
 828         size_t found = authentication.find('/');
 829
 830         if (sptr->sru.length() && found != std::string::npos)
 831         {
 832             b->set_option("user", authentication.substr(0, found));
 833             b->set_option("password", authentication.substr(found+1));
 834         }
 835         else
 836             b->set_option("user", authentication);
 837
 838         if (proxy.length())
 839             b->set_option("proxy", proxy);
 840     }
 841     if (b->sptr->contentConnector.length())
 842     {
 843         char *fname = (char *) xmalloc(m_p->content_tmp_file.length() + 8);
 844         strcpy(fname, m_p->content_tmp_file.c_str());
 845         char *xx = strstr(fname, "XXXXXX");
 846         if (!xx)
 847         {
 848             xx = fname + strlen(fname);
 849             strcat(fname, "XXXXXX");
 850         }
 851         char tmp_char = xx[6];
 852         sprintf(xx, "%06d", ((unsigned) rand()) % 1000000);
 853         xx[6] = tmp_char;
 854
 855         FILE *file = fopen(fname, "w");
 856         if (!file)
 857         {
 858             yaz_log(YLOG_WARN|YLOG_ERRNO, "create %s", fname);
 859             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 860             *addinfo = (char *)  odr_malloc(odr, 40 + strlen(fname));
 861             sprintf(*addinfo, "Could not create %s", fname);
 862             xfree(fname);
 863             BackendPtr backend_null;
 864             return backend_null;
 865         }
 866         b->content_session_id.assign(xx, 6);
 867         WRBUF w = wrbuf_alloc();
 868         wrbuf_puts(w, "#content_proxy\n");
 869         wrbuf_printf(w, "connector: %s\n", b->sptr->contentConnector.c_str());
 870         if (authentication.length())
 871             wrbuf_printf(w, "authentication: %s\n", authentication.c_str());
 872         if (proxy.length())
 873             wrbuf_printf(w, "proxy: %s\n", proxy.c_str());
 874         if (sptr->cfAuth.length())
 875             wrbuf_printf(w, "cfauth: %s\n", sptr->cfAuth.c_str());
 876         if (sptr->cfProxy.length())
 877             wrbuf_printf(w, "cfproxy: %s\n", sptr->cfProxy.c_str());
 878
 879         fwrite(wrbuf_buf(w), 1, wrbuf_len(w), file);
 880         fclose(file);
 881         yaz_log(YLOG_LOG, "file %s created\n", fname);
 882         xfree(fname);
 883     }
 884
 885     std::string url;
 886     if (sptr->sru.length())
 887     {
 888         url = "http://" + sptr->target;
 889         b->set_option("sru", sptr->sru);
 890     }
 891     else
 892     {
 893         url = sptr->target;
 894     }
 895     if (db_args.length())
 896         url += "," + db_args;
 897     yaz_log(YLOG_LOG, "url=%s", url.c_str());
 898     b->connect(url, error, addinfo, odr);
 899     if (*error == 0)
 900     {
 901         m_backend = b;
 902     }
 903     return b;
 904 }
 905
 906 Z_Records *yf::Zoom::Frontend::get_records(Odr_int start,
 907                                            Odr_int number_to_present,
 908                                            int *error,
 909                                            char **addinfo,
 910                                            Odr_int *number_of_records_returned,
 911                                            ODR odr,
 912                                            BackendPtr b,
 913                                            Odr_oid *preferredRecordSyntax,
 914                                            const char *element_set_name)
 915 {
 916     *number_of_records_returned = 0;
 917     Z_Records *records = 0;
 918     bool enable_pz2_retrieval = false; // whether target profile is used
 919     bool enable_pz2_transform = false; // whether XSLT is used as well
 920     bool assume_marc8_charset = false;
 921
 922     if (start < 0 || number_to_present <= 0)
 923         return records;
 924
 925     if (number_to_present > 10000)
 926         number_to_present = 10000;
 927
 928     ZOOM_record *recs = (ZOOM_record *)
 929         odr_malloc(odr, number_to_present * sizeof(*recs));
 930
 931     char oid_name_str[OID_STR_MAX];
 932     const char *syntax_name = 0;
 933
 934     if (preferredRecordSyntax &&
 935         !oid_oidcmp(preferredRecordSyntax, yaz_oid_recsyn_xml)
 936         && element_set_name)
 937     {
 938         if (!strcmp(element_set_name, m_p->element_transform.c_str()))
 939         {
 940             enable_pz2_retrieval = true;
 941             enable_pz2_transform = true;
 942         }
 943         else if (!strcmp(element_set_name, m_p->element_raw.c_str()))
 944         {
 945             enable_pz2_retrieval = true;
 946         }
 947     }
 948
 949     if (enable_pz2_retrieval)
 950     {
 951         if (b->sptr->request_syntax.length())
 952         {
 953             syntax_name = b->sptr->request_syntax.c_str();
 954             const Odr_oid *syntax_oid =
 955                 yaz_string_to_oid(yaz_oid_std(), CLASS_RECSYN, syntax_name);
 956             if (!oid_oidcmp(syntax_oid, yaz_oid_recsyn_usmarc)
 957                 || !oid_oidcmp(syntax_oid, yaz_oid_recsyn_opac))
 958                 assume_marc8_charset = true;
 959         }
 960     }
 961     else if (preferredRecordSyntax)
 962         syntax_name =
 963             yaz_oid_to_string_buf(preferredRecordSyntax, 0, oid_name_str);
 964
 965     b->set_option("preferredRecordSyntax", syntax_name);
 966
 967     if (enable_pz2_retrieval)
 968     {
 969         element_set_name = 0;
 970         if (b->sptr->element_set.length())
 971             element_set_name = b->sptr->element_set.c_str();
 972     }
 973
 974     b->set_option("elementSetName", element_set_name);
 975
 976     b->present(start, number_to_present, recs, error, addinfo, odr);
 977
 978     Odr_int i = 0;
 979     if (!*error)
 980     {
 981         for (i = 0; i < number_to_present; i++)
 982             if (!recs[i])
 983                 break;
 984     }
 985     if (i > 0)
 986     {  // only return records if no error and at least one record
 987         char *odr_database = odr_strdup(odr,
 988                                         b->m_frontend_database.c_str());
 989         Z_NamePlusRecordList *npl = (Z_NamePlusRecordList *)
 990             odr_malloc(odr, sizeof(*npl));
 991         *number_of_records_returned = i;
 992         npl->num_records = i;
 993         npl->records = (Z_NamePlusRecord **)
 994             odr_malloc(odr, i * sizeof(*npl->records));
 995         for (i = 0; i < number_to_present; i++)
 996         {
 997             Z_NamePlusRecord *npr = 0;
 998             const char *addinfo;
 999             int sur_error = ZOOM_record_error(recs[i], 0 /* msg */,
1000                                               &addinfo, 0 /* diagset */);
1001
1002             if (sur_error)
1003             {
1004                 npr = zget_surrogateDiagRec(odr, odr_database, sur_error,
1005                                             addinfo);
1006             }
1007             else if (enable_pz2_retrieval)
1008             {
1009                 char rec_type_str[100];
1010                 const char *record_encoding = 0;
1011
1012                 if (b->sptr->record_encoding.length())
1013                     record_encoding = b->sptr->record_encoding.c_str();
1014                 else if (assume_marc8_charset)
1015                     record_encoding = "marc8";
1016
1017                 strcpy(rec_type_str, b->sptr->use_turbomarc ? "txml" : "xml");
1018                 if (record_encoding)
1019                 {
1020                     strcat(rec_type_str, "; charset=");
1021                     strcat(rec_type_str, record_encoding);
1022                 }
1023
1024                 int rec_len;
1025                 xmlChar *xmlrec_buf = 0;
1026                 const char *rec_buf = ZOOM_record_get(recs[i], rec_type_str,
1027                                                       &rec_len);
1028                 if (!rec_buf && !npr)
1029                 {
1030                     std::string addinfo("ZOOM_record_get failed for type ");
1031
1032                     addinfo += rec_type_str;
1033                     npr = zget_surrogateDiagRec(
1034                         odr, odr_database,
1035                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1036                         addinfo.c_str());
1037                 }
1038
1039                 if (rec_buf && b->xsp && enable_pz2_transform)
1040                 {
1041                     xmlDoc *rec_doc = xmlParseMemory(rec_buf, rec_len);
1042                     if (!rec_doc)
1043                     {
1044                         npr = zget_surrogateDiagRec(
1045                             odr, odr_database,
1046                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1047                             "xml parse failed for record");
1048                     }
1049                     else
1050                     {
1051                         xmlDoc *rec_res =
1052                             xsltApplyStylesheet(b->xsp, rec_doc, 0);
1053
1054                         if (rec_res)
1055                         {
1056                             xsltSaveResultToString(&xmlrec_buf, &rec_len,
1057                                                    rec_res, b->xsp);
1058                             rec_buf = (const char *) xmlrec_buf;
1059
1060                             xmlFreeDoc(rec_res);
1061                         }
1062                         if (!rec_buf)
1063                         {
1064                             std::string addinfo;
1065
1066                             addinfo = "xslt apply failed for "
1067                                 + b->sptr->transform_xsl_fname;
1068                             npr = zget_surrogateDiagRec(
1069                                 odr, odr_database,
1070                                 YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1071                                 addinfo.c_str());
1072                         }
1073                         xmlFreeDoc(rec_doc);
1074                     }
1075                 }
1076
1077                 if (rec_buf)
1078                 {
1079                     xmlDoc *doc = xmlParseMemory(rec_buf, rec_len);
1080                     std::string res =
1081                         mp::xml::url_recipe_handle(doc, b->sptr->urlRecipe);
1082                     if (res.length() && b->content_session_id.length())
1083                     {
1084                         size_t off = res.find_first_of("://");
1085                         if (off != std::string::npos)
1086                         {
1087                             char tmp[1024];
1088                             sprintf(tmp, "%s.%s/",
1089                                     b->content_session_id.c_str(),
1090                                     m_p->content_proxy_server.c_str());
1091                             res.insert(off + 3, tmp);
1092                         }
1093                     }
1094                     if (res.length())
1095                     {
1096                         xmlNode *ptr = xmlDocGetRootElement(doc);
1097                         while (ptr && ptr->type != XML_ELEMENT_NODE)
1098                             ptr = ptr->next;
1099                         xmlNode *c =
1100                             xmlNewChild(ptr, 0, BAD_CAST "generated-url", 0);
1101                         xmlNode * t = xmlNewText(BAD_CAST res.c_str());
1102                         xmlAddChild(c, t);
1103
1104                         if (xmlrec_buf)
1105                             xmlFree(xmlrec_buf);
1106
1107                         xmlDocDumpMemory(doc, &xmlrec_buf, &rec_len);
1108                         rec_buf = (const char *) xmlrec_buf;
1109                     }
1110                     xmlFreeDoc(doc);
1111                 }
1112                 if (!npr)
1113                 {
1114                     if (!rec_buf)
1115                         npr = zget_surrogateDiagRec(
1116                             odr, odr_database,
1117                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1118                             rec_type_str);
1119                     else
1120                     {
1121                         npr = (Z_NamePlusRecord *)
1122                             odr_malloc(odr, sizeof(*npr));
1123                         npr->databaseName = odr_database;
1124                         npr->which = Z_NamePlusRecord_databaseRecord;
1125                         npr->u.databaseRecord =
1126                             z_ext_record_xml(odr, rec_buf, rec_len);
1127                     }
1128                 }
1129                 if (xmlrec_buf)
1130                     xmlFree(xmlrec_buf);
1131             }
1132             else
1133             {
1134                 Z_External *ext =
1135                     (Z_External *) ZOOM_record_get(recs[i], "ext", 0);
1136                 if (ext)
1137                 {
1138                     npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
1139                     npr->databaseName = odr_database;
1140                     npr->which = Z_NamePlusRecord_databaseRecord;
1141                     npr->u.databaseRecord = ext;
1142                 }
1143                 else
1144                 {
1145                     npr = zget_surrogateDiagRec(
1146                         odr, odr_database,
1147                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1148                         "ZOOM_record, type ext");
1149                 }
1150             }
1151             npl->records[i] = npr;
1152         }
1153         records = (Z_Records*) odr_malloc(odr, sizeof(*records));
1154         records->which = Z_Records_DBOSD;
1155         records->u.databaseOrSurDiagnostics = npl;
1156     }
1157     return records;
1158 }
1159
1160 struct cql_node *yf::Zoom::Impl::convert_cql_fields(struct cql_node *cn,
1161                                                     ODR odr)
1162 {
1163     struct cql_node *r = 0;
1164     if (!cn)
1165         return 0;
1166     switch (cn->which)
1167     {
1168     case CQL_NODE_ST:
1169         if (cn->u.st.index)
1170         {
1171             std::map<std::string,std::string>::const_iterator it;
1172             it = fieldmap.find(cn->u.st.index);
1173             if (it == fieldmap.end())
1174                 return cn;
1175             if (it->second.length())
1176                 cn->u.st.index = odr_strdup(odr, it->second.c_str());
1177             else
1178                 cn->u.st.index = 0;
1179         }
1180         break;
1181     case CQL_NODE_BOOL:
1182         r = convert_cql_fields(cn->u.boolean.left, odr);
1183         if (!r)
1184             r = convert_cql_fields(cn->u.boolean.right, odr);
1185         break;
1186     case CQL_NODE_SORT:
1187         r = convert_cql_fields(cn->u.sort.search, odr);
1188         break;
1189     }
1190     return r;
1191 }
1192
1193 static void sort_pqf_type_7(WRBUF pqf_wrbuf, const char *sru_sortkeys)
1194 {
1195     /* sortkey layour: path,schema,ascending,caseSensitive,missingValue */
1196     /* see cql_sortby_to_sortkeys of YAZ. */
1197     char **sortspec;
1198     int num_sortspec = 0;
1199     int i;
1200     NMEM nmem = nmem_create();
1201
1202     if (sru_sortkeys)
1203         nmem_strsplit_blank(nmem, sru_sortkeys, &sortspec, &num_sortspec);
1204     if (num_sortspec > 0)
1205     {
1206         WRBUF w = wrbuf_alloc();
1207         for (i = 0; i < num_sortspec; i++)
1208         {
1209             char **arg;
1210             int num_arg;
1211             int ascending = 1;
1212             nmem_strsplitx(nmem, ",", sortspec[i], &arg, &num_arg, 0);
1213
1214             if (num_arg > 2 && arg[2][0])
1215                 ascending = atoi(arg[2]);
1216
1217             wrbuf_puts(w, "@or @attr 1=");
1218             yaz_encode_pqf_term(w, arg[0], strlen(arg[0]));
1219             wrbuf_printf(w, "@attr 7=%d %d ", ascending ? 1 : 2, i);
1220         }
1221         if (wrbuf_len(w))
1222         {
1223             wrbuf_puts(w, wrbuf_cstr(pqf_wrbuf));
1224             wrbuf_rewind(pqf_wrbuf);
1225             wrbuf_puts(pqf_wrbuf, wrbuf_cstr(w));
1226         }
1227         wrbuf_destroy(w);
1228     }
1229     nmem_destroy(nmem);
1230 }
1231
1232 static void sort_via_cql(WRBUF cql_sortby, const char *sru_sortkeys)
1233 {
1234     /* sortkey layour: path,schema,ascending,caseSensitive,missingValue */
1235     /* see cql_sortby_to_sortkeys of YAZ. */
1236     char **sortspec;
1237     int num_sortspec = 0;
1238     int i;
1239     NMEM nmem = nmem_create();
1240
1241     if (sru_sortkeys)
1242         nmem_strsplit_blank(nmem, sru_sortkeys, &sortspec, &num_sortspec);
1243     if (num_sortspec > 0)
1244     {
1245         WRBUF w = wrbuf_alloc();
1246         for (i = 0; i < num_sortspec; i++)
1247         {
1248             char **arg;
1249             int num_arg;
1250             int ascending = 1;
1251             int case_sensitive = 0;
1252             const char *missing = 0;
1253             nmem_strsplitx(nmem, ",", sortspec[i], &arg, &num_arg, 0);
1254
1255             if (num_arg > 2 && arg[2][0])
1256                 ascending = atoi(arg[2]);
1257             if (num_arg > 3 && arg[3][0])
1258                 case_sensitive = atoi(arg[3]);
1259             if (num_arg > 4 && arg[4][0])
1260                 missing = arg[4];
1261             if (i > 0)
1262                 wrbuf_puts(w, " ");
1263             else
1264                 wrbuf_puts(w, " sortby ");
1265             wrbuf_puts(w, arg[0]);  /* field */
1266             wrbuf_puts(w, "/");
1267             wrbuf_puts(w, ascending ? "ascending" : "descending");
1268             if (case_sensitive)
1269                 wrbuf_puts(w, "/respectCase");
1270             if (missing)
1271             {
1272                 if (!strcmp(missing, "omit"))
1273                     wrbuf_puts(w, "/missingOmit");
1274                 else if (!strcmp(missing, "abort"))
1275                     wrbuf_puts(w, "/missingFail");
1276                 else if (!strcmp(missing, "lowValue"))
1277                     wrbuf_puts(w, "/missingLow");
1278                 else if (!strcmp(missing, "highValue"))
1279                     wrbuf_puts(w, "/missingHigh");
1280             }
1281         }
1282         if (wrbuf_len(w))
1283             wrbuf_puts(cql_sortby, wrbuf_cstr(w));
1284         wrbuf_destroy(w);
1285     }
1286     nmem_destroy(nmem);
1287 }
1288
1289 #if YAZ_VERSIONL < 0x40206
1290 static void wrbuf_vp_puts(const char *buf, void *client_data)
1291 {
1292     WRBUF b = (WRBUF) client_data;
1293     wrbuf_puts(b, buf);
1294 }
1295 #endif
1296
1297 void yf::Zoom::Frontend::handle_search(mp::Package &package)
1298 {
1299     Z_GDU *gdu = package.request().get();
1300     Z_APDU *apdu_req = gdu->u.z3950;
1301     Z_APDU *apdu_res = 0;
1302     mp::odr odr;
1303     Z_SearchRequest *sr = apdu_req->u.searchRequest;
1304     if (sr->num_databaseNames != 1)
1305     {
1306         apdu_res = odr.create_searchResponse(
1307             apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
1308         package.response() = apdu_res;
1309         return;
1310     }
1311
1312     int error = 0;
1313     char *addinfo = 0;
1314     std::string db(sr->databaseNames[0]);
1315     BackendPtr b = get_backend_from_databases(db, &error, &addinfo, odr);
1316     if (error)
1317     {
1318         apdu_res =
1319             odr.create_searchResponse(apdu_req, error, addinfo);
1320         package.response() = apdu_res;
1321         return;
1322     }
1323
1324     b->set_option("setname", "default");
1325
1326     Odr_int hits = 0;
1327     Z_Query *query = sr->query;
1328     WRBUF ccl_wrbuf = 0;
1329     WRBUF pqf_wrbuf = 0;
1330     std::string sru_sortkeys;
1331
1332     if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
1333     {
1334         // RPN
1335         pqf_wrbuf = wrbuf_alloc();
1336         yaz_rpnquery_to_wrbuf(pqf_wrbuf, query->u.type_1);
1337     }
1338     else if (query->which == Z_Query_type_2)
1339     {
1340         // CCL
1341         ccl_wrbuf = wrbuf_alloc();
1342         wrbuf_write(ccl_wrbuf, (const char *) query->u.type_2->buf,
1343                     query->u.type_2->len);
1344     }
1345     else if (query->which == Z_Query_type_104 &&
1346              query->u.type_104->which == Z_External_CQL)
1347     {
1348         // CQL
1349         const char *cql = query->u.type_104->u.cql;
1350         CQL_parser cp = cql_parser_create();
1351         int r = cql_parser_string(cp, cql);
1352         if (r)
1353         {
1354             cql_parser_destroy(cp);
1355             apdu_res =
1356                 odr.create_searchResponse(apdu_req,
1357                                           YAZ_BIB1_MALFORMED_QUERY,
1358                                           "CQL syntax error");
1359             package.response() = apdu_res;
1360             return;
1361         }
1362         struct cql_node *cn = cql_parser_result(cp);
1363         struct cql_node *cn_error = m_p->convert_cql_fields(cn, odr);
1364         if (cn_error)
1365         {
1366             // hopefully we are getting a ptr to a index+relation+term node
1367             addinfo = 0;
1368             if (cn_error->which == CQL_NODE_ST)
1369                 addinfo = cn_error->u.st.index;
1370
1371             apdu_res =
1372                 odr.create_searchResponse(apdu_req,
1373                                           YAZ_BIB1_UNSUPP_USE_ATTRIBUTE,
1374                                           addinfo);
1375             package.response() = apdu_res;
1376             return;
1377         }
1378         char ccl_buf[1024];
1379
1380         r = cql_to_ccl_buf(cn, ccl_buf, sizeof(ccl_buf));
1381         if (r == 0)
1382         {
1383             ccl_wrbuf = wrbuf_alloc();
1384             wrbuf_puts(ccl_wrbuf, ccl_buf);
1385
1386             WRBUF sru_sortkeys_wrbuf = wrbuf_alloc();
1387
1388             cql_sortby_to_sortkeys(cn, wrbuf_vp_puts, sru_sortkeys_wrbuf);
1389
1390             sru_sortkeys.assign(wrbuf_cstr(sru_sortkeys_wrbuf));
1391             wrbuf_destroy(sru_sortkeys_wrbuf);
1392         }
1393         cql_parser_destroy(cp);
1394         if (r)
1395         {
1396             apdu_res =
1397                 odr.create_searchResponse(apdu_req,
1398                                           YAZ_BIB1_MALFORMED_QUERY,
1399                                           "CQL to CCL conversion error");
1400             package.response() = apdu_res;
1401             return;
1402         }
1403     }
1404     else
1405     {
1406         apdu_res =
1407             odr.create_searchResponse(apdu_req, YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
1408         package.response() = apdu_res;
1409         return;
1410     }
1411
1412     if (ccl_wrbuf)
1413     {
1414         // CCL to PQF
1415         assert(pqf_wrbuf == 0);
1416         int cerror, cpos;
1417         struct ccl_rpn_node *cn;
1418         yaz_log(YLOG_LOG, "CCL: %s", wrbuf_cstr(ccl_wrbuf));
1419         cn = ccl_find_str(b->sptr->ccl_bibset, wrbuf_cstr(ccl_wrbuf),
1420                           &cerror, &cpos);
1421         wrbuf_destroy(ccl_wrbuf);
1422         if (!cn)
1423         {
1424             char *addinfo = odr_strdup(odr, ccl_err_msg(cerror));
1425             int z3950_diag = YAZ_BIB1_MALFORMED_QUERY;
1426
1427             switch (cerror)
1428             {
1429             case CCL_ERR_UNKNOWN_QUAL:
1430                 z3950_diag = YAZ_BIB1_UNSUPP_USE_ATTRIBUTE;
1431                 break;
1432             case CCL_ERR_TRUNC_NOT_LEFT:
1433             case CCL_ERR_TRUNC_NOT_RIGHT:
1434             case CCL_ERR_TRUNC_NOT_BOTH:
1435                 z3950_diag = YAZ_BIB1_UNSUPP_TRUNCATION_ATTRIBUTE;
1436                 break;
1437             }
1438             apdu_res =
1439                 odr.create_searchResponse(apdu_req, z3950_diag, addinfo);
1440             package.response() = apdu_res;
1441             return;
1442         }
1443         pqf_wrbuf = wrbuf_alloc();
1444         ccl_pquery(pqf_wrbuf, cn);
1445         ccl_rpn_delete(cn);
1446     }
1447
1448     assert(pqf_wrbuf);
1449     if (b->get_option("sru"))
1450     {
1451         int status = 0;
1452         Z_RPNQuery *zquery;
1453         zquery = p_query_rpn(odr, wrbuf_cstr(pqf_wrbuf));
1454         WRBUF wrb = wrbuf_alloc();
1455
1456         if (!strcmp(b->get_option("sru"), "solr"))
1457         {
1458             solr_transform_t cqlt = solr_transform_create();
1459
1460             status = solr_transform_rpn2solr_wrbuf(cqlt, wrb, zquery);
1461
1462             solr_transform_close(cqlt);
1463         }
1464         else
1465         {
1466             cql_transform_t cqlt = cql_transform_create();
1467
1468             status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery);
1469
1470             cql_transform_close(cqlt);
1471
1472             if (status == 0)
1473                 sort_via_cql(wrb, sru_sortkeys.c_str());
1474         }
1475         if (status == 0)
1476         {
1477             yaz_log(YLOG_LOG, "search CQL: %s", wrbuf_cstr(wrb));
1478             b->search_cql(wrbuf_cstr(wrb), &hits, &error, &addinfo, odr);
1479         }
1480
1481         wrbuf_destroy(wrb);
1482         wrbuf_destroy(pqf_wrbuf);
1483         if (status)
1484         {
1485             apdu_res =
1486                 odr.create_searchResponse(apdu_req, YAZ_BIB1_MALFORMED_QUERY,
1487                                           "can not convert from RPN to CQL/SOLR");
1488             package.response() = apdu_res;
1489             return;
1490         }
1491     }
1492     else
1493     {
1494         sort_pqf_type_7(pqf_wrbuf, sru_sortkeys.c_str());
1495
1496         yaz_log(YLOG_LOG, "search PQF: %s", wrbuf_cstr(pqf_wrbuf));
1497         b->search_pqf(wrbuf_cstr(pqf_wrbuf), &hits, &error, &addinfo, odr);
1498         wrbuf_destroy(pqf_wrbuf);
1499     }
1500
1501     const char *element_set_name = 0;
1502     Odr_int number_to_present = 0;
1503     if (!error)
1504         mp::util::piggyback_sr(sr, hits, number_to_present, &element_set_name);
1505
1506     Odr_int number_of_records_returned = 0;
1507     Z_Records *records = get_records(
1508         0, number_to_present, &error, &addinfo,
1509         &number_of_records_returned, odr, b, sr->preferredRecordSyntax,
1510         element_set_name);
1511     apdu_res = odr.create_searchResponse(apdu_req, error, addinfo);
1512     if (records)
1513     {
1514         apdu_res->u.searchResponse->records = records;
1515         apdu_res->u.searchResponse->numberOfRecordsReturned =
1516             odr_intdup(odr, number_of_records_returned);
1517     }
1518     apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
1519     package.response() = apdu_res;
1520 }
1521
1522 void yf::Zoom::Frontend::handle_present(mp::Package &package)
1523 {
1524     Z_GDU *gdu = package.request().get();
1525     Z_APDU *apdu_req = gdu->u.z3950;
1526     Z_APDU *apdu_res = 0;
1527     Z_PresentRequest *pr = apdu_req->u.presentRequest;
1528
1529     mp::odr odr;
1530     if (!m_backend)
1531     {
1532         package.response() = odr.create_presentResponse(
1533             apdu_req, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST, 0);
1534         return;
1535     }
1536     const char *element_set_name = 0;
1537     Z_RecordComposition *comp = pr->recordComposition;
1538     if (comp && comp->which != Z_RecordComp_simple)
1539     {
1540         package.response() = odr.create_presentResponse(
1541             apdu_req,
1542             YAZ_BIB1_PRESENT_COMP_SPEC_PARAMETER_UNSUPP, 0);
1543         return;
1544     }
1545     if (comp && comp->u.simple->which == Z_ElementSetNames_generic)
1546         element_set_name = comp->u.simple->u.generic;
1547     Odr_int number_of_records_returned = 0;
1548     int error = 0;
1549     char *addinfo = 0;
1550     Z_Records *records = get_records(
1551         *pr->resultSetStartPoint - 1, *pr->numberOfRecordsRequested,
1552         &error, &addinfo, &number_of_records_returned, odr, m_backend,
1553         pr->preferredRecordSyntax, element_set_name);
1554
1555     apdu_res = odr.create_presentResponse(apdu_req, error, addinfo);
1556     if (records)
1557     {
1558         apdu_res->u.presentResponse->records = records;
1559         apdu_res->u.presentResponse->numberOfRecordsReturned =
1560             odr_intdup(odr, number_of_records_returned);
1561     }
1562     package.response() = apdu_res;
1563 }
1564
1565 void yf::Zoom::Frontend::handle_package(mp::Package &package)
1566 {
1567     Z_GDU *gdu = package.request().get();
1568     if (!gdu)
1569         ;
1570     else if (gdu->which == Z_GDU_Z3950)
1571     {
1572         Z_APDU *apdu_req = gdu->u.z3950;
1573         if (apdu_req->which == Z_APDU_initRequest)
1574         {
1575             mp::odr odr;
1576             package.response() = odr.create_close(
1577                 apdu_req,
1578                 Z_Close_protocolError,
1579                 "double init");
1580         }
1581         else if (apdu_req->which == Z_APDU_searchRequest)
1582         {
1583             handle_search(package);
1584         }
1585         else if (apdu_req->which == Z_APDU_presentRequest)
1586         {
1587             handle_present(package);
1588         }
1589         else
1590         {
1591             mp::odr odr;
1592             package.response() = odr.create_close(
1593                 apdu_req,
1594                 Z_Close_protocolError,
1595                 "zoom filter cannot handle this APDU");
1596             package.session().close();
1597         }
1598     }
1599     else
1600     {
1601         package.session().close();
1602     }
1603 }
1604
1605 void yf::Zoom::Impl::process(mp::Package &package)
1606 {
1607     FrontendPtr f = get_frontend(package);
1608     Z_GDU *gdu = package.request().get();
1609
1610     if (f->m_is_virtual)
1611     {
1612         f->handle_package(package);
1613     }
1614     else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1615              Z_APDU_initRequest)
1616     {
1617         Z_InitRequest *req = gdu->u.z3950->u.initRequest;
1618         f->m_init_gdu = gdu;
1619
1620         mp::odr odr;
1621         Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
1622         Z_InitResponse *resp = apdu->u.initResponse;
1623
1624         int i;
1625         static const int masks[] = {
1626             Z_Options_search,
1627             Z_Options_present,
1628             -1
1629         };
1630         for (i = 0; masks[i] != -1; i++)
1631             if (ODR_MASK_GET(req->options, masks[i]))
1632                 ODR_MASK_SET(resp->options, masks[i]);
1633
1634         static const int versions[] = {
1635             Z_ProtocolVersion_1,
1636             Z_ProtocolVersion_2,
1637             Z_ProtocolVersion_3,
1638             -1
1639         };
1640         for (i = 0; versions[i] != -1; i++)
1641             if (ODR_MASK_GET(req->protocolVersion, versions[i]))
1642                 ODR_MASK_SET(resp->protocolVersion, versions[i]);
1643             else
1644                 break;
1645
1646         *resp->preferredMessageSize = *req->preferredMessageSize;
1647         *resp->maximumRecordSize = *req->maximumRecordSize;
1648
1649         package.response() = apdu;
1650         f->m_is_virtual = true;
1651     }
1652     else
1653         package.move();
1654
1655     release_frontend(package);
1656 }
1657
1658
1659 static mp::filter::Base* filter_creator()
1660 {
1661     return new mp::filter::Zoom;
1662 }
1663
1664 extern "C" {
1665     struct metaproxy_1_filter_struct metaproxy_1_filter_zoom = {
1666         0,
1667         "zoom",
1668         filter_creator
1669     };
1670 }
1671
1672
1673 /*
1674  * Local variables:
1675  * c-basic-offset: 4
1676  * c-file-style: "Stroustrup"
1677  * indent-tabs-mode: nil
1678  * End:
1679  * vim: shiftwidth=4 tabstop=8 expandtab
1680  */
1681