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