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 <fcntl.h>
  24 #include "filter_zoom.hpp"
  25 #include <yaz/zoom.h>
  26 #include <yaz/yaz-version.h>
  27 #include <yaz/tpath.h>
  28 #include <yaz/srw.h>
  29 #include <metaproxy/package.hpp>
  30 #include <metaproxy/util.hpp>
  31 #include <metaproxy/xmlutil.hpp>
  32 #include "torus.hpp"
  33
  34 #include <libxslt/xsltutils.h>
  35 #include <libxslt/transform.h>
  36
  37 #include <boost/thread/mutex.hpp>
  38 #include <boost/thread/condition.hpp>
  39 #include <yaz/ccl_xml.h>
  40 #include <yaz/ccl.h>
  41 #include <yaz/rpn2cql.h>
  42 #include <yaz/rpn2solr.h>
  43 #include <yaz/pquery.h>
  44 #include <yaz/cql.h>
  45 #include <yaz/oid_db.h>
  46 #include <yaz/diagbib1.h>
  47 #include <yaz/log.h>
  48 #include <yaz/zgdu.h>
  49 #include <yaz/querytowrbuf.h>
  50
  51 namespace mp = metaproxy_1;
  52 namespace yf = mp::filter;
  53
  54 namespace metaproxy_1 {
  55     namespace filter {
  56         class Zoom::Searchable : boost::noncopyable {
  57           public:
  58             std::string authentication;
  59             std::string cfAuth;
  60             std::string cfProxy;
  61             std::string cfSubDb;
  62             std::string udb;
  63             std::string target;
  64             std::string query_encoding;
  65             std::string sru;
  66             std::string request_syntax;
  67             std::string element_set;
  68             std::string record_encoding;
  69             std::string transform_xsl_fname;
  70             std::string urlRecipe;
  71             std::string contentConnector;
  72             bool use_turbomarc;
  73             bool piggyback;
  74             CCL_bibset ccl_bibset;
  75             Searchable(CCL_bibset base);
  76             ~Searchable();
  77         };
  78         class Zoom::Backend : boost::noncopyable {
  79             friend class Impl;
  80             friend class Frontend;
  81             std::string zurl;
  82             ZOOM_connection m_connection;
  83             ZOOM_resultset m_resultset;
  84             std::string m_frontend_database;
  85             SearchablePtr sptr;
  86             xsltStylesheetPtr xsp;
  87             std::string content_session_id;
  88         public:
  89             Backend(SearchablePtr sptr);
  90             ~Backend();
  91             void connect(std::string zurl, int *error, char **addinfo,
  92                          ODR odr);
  93             void search_pqf(const char *pqf, Odr_int *hits,
  94                             int *error, char **addinfo, ODR odr);
  95             void search_cql(const char *cql, Odr_int *hits,
  96                             int *error, char **addinfo, ODR odr);
  97             void present(Odr_int start, Odr_int number, ZOOM_record *recs,
  98                          int *error, char **addinfo, ODR odr);
  99             void set_option(const char *name, const char *value);
 100             void set_option(const char *name, std::string value);
 101             const char *get_option(const char *name);
 102             void get_zoom_error(int *error, char **addinfo, ODR odr);
 103         };
 104         class Zoom::Frontend : boost::noncopyable {
 105             friend class Impl;
 106             Impl *m_p;
 107             bool m_is_virtual;
 108             bool m_in_use;
 109             yazpp_1::GDU m_init_gdu;
 110             BackendPtr m_backend;
 111             void handle_package(mp::Package &package);
 112             void handle_search(mp::Package &package);
 113             void handle_present(mp::Package &package);
 114             BackendPtr get_backend_from_databases(std::string &database,
 115                                                   int *error,
 116                                                   char **addinfo,
 117                                                   ODR odr);
 118             Z_Records *get_records(Odr_int start,
 119                                    Odr_int number_to_present,
 120                                    int *error,
 121                                    char **addinfo,
 122                                    Odr_int *number_of_records_returned,
 123                                    ODR odr, BackendPtr b,
 124                                    Odr_oid *preferredRecordSyntax,
 125                                    const char *element_set_name);
 126         public:
 127             Frontend(Impl *impl);
 128             ~Frontend();
 129         };
 130         class Zoom::Impl {
 131             friend class Frontend;
 132         public:
 133             Impl();
 134             ~Impl();
 135             void process(metaproxy_1::Package & package);
 136             void configure(const xmlNode * ptr, bool test_only,
 137                            const char *path);
 138         private:
 139             void configure_local_records(const xmlNode * ptr, bool test_only);
 140             FrontendPtr get_frontend(mp::Package &package);
 141             void release_frontend(mp::Package &package);
 142             SearchablePtr parse_torus_record(const xmlNode *ptr);
 143             struct cql_node *convert_cql_fields(struct cql_node *cn, ODR odr);
 144             std::map<mp::Session, FrontendPtr> m_clients;
 145             boost::mutex m_mutex;
 146             boost::condition m_cond_session_ready;
 147             std::string torus_url;
 148             std::map<std::string,std::string> fieldmap;
 149             std::string xsldir;
 150             std::string file_path;
 151             std::string content_proxy_server;
 152             std::string content_tmp_file;
 153             bool apdu_log;
 154             CCL_bibset bibset;
 155             std::string element_transform;
 156             std::string element_raw;
 157             std::map<std::string,SearchablePtr> s_map;
 158         };
 159     }
 160 }
 161
 162 // define Pimpl wrapper forwarding to Impl
 163
 164 yf::Zoom::Zoom() : m_p(new Impl)
 165 {
 166 }
 167
 168 yf::Zoom::~Zoom()
 169 {  // must have a destructor because of boost::scoped_ptr
 170 }
 171
 172 void yf::Zoom::configure(const xmlNode *xmlnode, bool test_only,
 173                          const char *path)
 174 {
 175     m_p->configure(xmlnode, test_only, path);
 176 }
 177
 178 void yf::Zoom::process(mp::Package &package) const
 179 {
 180     m_p->process(package);
 181 }
 182
 183
 184 // define Implementation stuff
 185
 186 yf::Zoom::Backend::Backend(SearchablePtr ptr) : sptr(ptr)
 187 {
 188     m_connection = ZOOM_connection_create(0);
 189     m_resultset = 0;
 190     xsp = 0;
 191 }
 192
 193 yf::Zoom::Backend::~Backend()
 194 {
 195     if (xsp)
 196         xsltFreeStylesheet(xsp);
 197     ZOOM_connection_destroy(m_connection);
 198     ZOOM_resultset_destroy(m_resultset);
 199 }
 200
 201
 202 void yf::Zoom::Backend::get_zoom_error(int *error, char **addinfo,
 203                                        ODR odr)
 204 {
 205     const char *msg = 0;
 206     const char *zoom_addinfo = 0;
 207     const char *dset = 0;
 208     *error = ZOOM_connection_error_x(m_connection, &msg, &zoom_addinfo, &dset);
 209     if (*error)
 210     {
 211         if (*error >= ZOOM_ERROR_CONNECT)
 212         {
 213             // turn ZOOM diagnostic into a Bib-1 2: with addinfo=zoom err msg
 214             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 215             *addinfo = (char *) odr_malloc(
 216                 odr, 20 + strlen(msg) +
 217                 (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 218             strcpy(*addinfo, msg);
 219             if (zoom_addinfo)
 220             {
 221                 strcat(*addinfo, ": ");
 222                 strcat(*addinfo, zoom_addinfo);
 223                 strcat(*addinfo, " ");
 224             }
 225         }
 226         else
 227         {
 228             if (dset && !strcmp(dset, "info:srw/diagnostic/1"))
 229                 *error = yaz_diag_srw_to_bib1(*error);
 230             *addinfo = (char *) odr_malloc(
 231                 odr, 20 + (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 232             **addinfo = '\0';
 233             if (zoom_addinfo && *zoom_addinfo)
 234             {
 235                 strcpy(*addinfo, zoom_addinfo);
 236                 strcat(*addinfo, " ");
 237             }
 238             strcat(*addinfo, "(backend)");
 239         }
 240     }
 241 }
 242
 243 void yf::Zoom::Backend::connect(std::string zurl,
 244                                 int *error, char **addinfo,
 245                                 ODR odr)
 246 {
 247     ZOOM_connection_connect(m_connection, zurl.c_str(), 0);
 248     get_zoom_error(error, addinfo, odr);
 249 }
 250
 251 void yf::Zoom::Backend::search_pqf(const char *pqf, Odr_int *hits,
 252                                    int *error, char **addinfo, ODR odr)
 253 {
 254     m_resultset = ZOOM_connection_search_pqf(m_connection, pqf);
 255     get_zoom_error(error, addinfo, odr);
 256     if (*error == 0)
 257         *hits = ZOOM_resultset_size(m_resultset);
 258     else
 259         *hits = 0;
 260 }
 261
 262 void yf::Zoom::Backend::search_cql(const char *cql, Odr_int *hits,
 263                                    int *error, char **addinfo, ODR odr)
 264 {
 265     ZOOM_query q = ZOOM_query_create();
 266
 267     ZOOM_query_cql(q, cql);
 268
 269     m_resultset = ZOOM_connection_search(m_connection, q);
 270     ZOOM_query_destroy(q);
 271     get_zoom_error(error, addinfo, odr);
 272     if (*error == 0)
 273         *hits = ZOOM_resultset_size(m_resultset);
 274     else
 275         *hits = 0;
 276 }
 277
 278 void yf::Zoom::Backend::present(Odr_int start, Odr_int number,
 279                                 ZOOM_record *recs,
 280                                 int *error, char **addinfo, ODR odr)
 281 {
 282     ZOOM_resultset_records(m_resultset, recs, start, number);
 283     get_zoom_error(error, addinfo, odr);
 284 }
 285
 286 void yf::Zoom::Backend::set_option(const char *name, const char *value)
 287 {
 288     ZOOM_connection_option_set(m_connection, name, value);
 289     if (m_resultset)
 290         ZOOM_resultset_option_set(m_resultset, name, value);
 291 }
 292
 293 void yf::Zoom::Backend::set_option(const char *name, std::string value)
 294 {
 295     set_option(name, value.c_str());
 296 }
 297
 298 const char *yf::Zoom::Backend::get_option(const char *name)
 299 {
 300     return ZOOM_connection_option_get(m_connection, name);
 301 }
 302
 303 yf::Zoom::Searchable::Searchable(CCL_bibset base)
 304 {
 305     piggyback = true;
 306     use_turbomarc = true;
 307     ccl_bibset = ccl_qual_dup(base);
 308 }
 309
 310 yf::Zoom::Searchable::~Searchable()
 311 {
 312     ccl_qual_rm(&ccl_bibset);
 313 }
 314
 315 yf::Zoom::Frontend::Frontend(Impl *impl) :
 316     m_p(impl), m_is_virtual(false), m_in_use(true)
 317 {
 318 }
 319
 320 yf::Zoom::Frontend::~Frontend()
 321 {
 322 }
 323
 324 yf::Zoom::FrontendPtr yf::Zoom::Impl::get_frontend(mp::Package &package)
 325 {
 326     boost::mutex::scoped_lock lock(m_mutex);
 327
 328     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 329
 330     while(true)
 331     {
 332         it = m_clients.find(package.session());
 333         if (it == m_clients.end())
 334             break;
 335
 336         if (!it->second->m_in_use)
 337         {
 338             it->second->m_in_use = true;
 339             return it->second;
 340         }
 341         m_cond_session_ready.wait(lock);
 342     }
 343     FrontendPtr f(new Frontend(this));
 344     m_clients[package.session()] = f;
 345     f->m_in_use = true;
 346     return f;
 347 }
 348
 349 void yf::Zoom::Impl::release_frontend(mp::Package &package)
 350 {
 351     boost::mutex::scoped_lock lock(m_mutex);
 352     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 353
 354     it = m_clients.find(package.session());
 355     if (it != m_clients.end())
 356     {
 357         if (package.session().is_closed())
 358         {
 359             m_clients.erase(it);
 360         }
 361         else
 362         {
 363             it->second->m_in_use = false;
 364         }
 365         m_cond_session_ready.notify_all();
 366     }
 367 }
 368
 369 yf::Zoom::Impl::Impl() :
 370     apdu_log(false), element_transform("pz2") , element_raw("raw")
 371 {
 372     bibset = ccl_qual_mk();
 373
 374     srand((unsigned int) time(0));
 375 }
 376
 377 yf::Zoom::Impl::~Impl()
 378 {
 379     ccl_qual_rm(&bibset);
 380 }
 381
 382 yf::Zoom::SearchablePtr yf::Zoom::Impl::parse_torus_record(const xmlNode *ptr)
 383 {
 384     Zoom::SearchablePtr s(new Searchable(bibset));
 385
 386     for (ptr = ptr->children; ptr; ptr = ptr->next)
 387     {
 388         if (ptr->type != XML_ELEMENT_NODE)
 389             continue;
 390         if (!strcmp((const char *) ptr->name, "layer"))
 391             ptr = ptr->children;
 392         else if (!strcmp((const char *) ptr->name,
 393                          "authentication"))
 394         {
 395             s->authentication = mp::xml::get_text(ptr);
 396         }
 397         else if (!strcmp((const char *) ptr->name,
 398                          "cfAuth"))
 399         {
 400             s->cfAuth = mp::xml::get_text(ptr);
 401         }
 402         else if (!strcmp((const char *) ptr->name,
 403                          "cfProxy"))
 404         {
 405             s->cfProxy = mp::xml::get_text(ptr);
 406         }
 407         else if (!strcmp((const char *) ptr->name,
 408                          "cfSubDb"))
 409         {
 410             s->cfSubDb = mp::xml::get_text(ptr);
 411         }
 412         else if (!strcmp((const char *) ptr->name,
 413                          "contentConnector"))
 414         {
 415             s->contentConnector = mp::xml::get_text(ptr);
 416         }
 417         else if (!strcmp((const char *) ptr->name, "udb"))
 418         {
 419             s->udb = mp::xml::get_text(ptr);
 420         }
 421         else if (!strcmp((const char *) ptr->name, "zurl"))
 422         {
 423             s->target = mp::xml::get_text(ptr);
 424         }
 425         else if (!strcmp((const char *) ptr->name, "sru"))
 426         {
 427             s->sru = mp::xml::get_text(ptr);
 428         }
 429         else if (!strcmp((const char *) ptr->name,
 430                          "queryEncoding"))
 431         {
 432             s->query_encoding = mp::xml::get_text(ptr);
 433         }
 434         else if (!strcmp((const char *) ptr->name,
 435                          "piggyback"))
 436         {
 437             s->piggyback = mp::xml::get_bool(ptr, true);
 438         }
 439         else if (!strcmp((const char *) ptr->name,
 440                          "requestSyntax"))
 441         {
 442             s->request_syntax = mp::xml::get_text(ptr);
 443         }
 444         else if (!strcmp((const char *) ptr->name,
 445                          "elementSet"))
 446         {
 447             s->element_set = mp::xml::get_text(ptr);
 448         }
 449         else if (!strcmp((const char *) ptr->name,
 450                          "recordEncoding"))
 451         {
 452             s->record_encoding = mp::xml::get_text(ptr);
 453         }
 454         else if (!strcmp((const char *) ptr->name,
 455                          "transform"))
 456         {
 457             s->transform_xsl_fname = mp::xml::get_text(ptr);
 458         }
 459         else if (!strcmp((const char *) ptr->name,
 460                          "urlRecipe"))
 461         {
 462             s->urlRecipe = mp::xml::get_text(ptr);
 463         }
 464         else if (!strcmp((const char *) ptr->name,
 465                          "useTurboMarc"))
 466         {
 467             ; // useTurboMarc is ignored
 468         }
 469         else if (!strncmp((const char *) ptr->name,
 470                           "cclmap_", 7))
 471         {
 472             std::string value = mp::xml::get_text(ptr);
 473             ccl_qual_fitem(s->ccl_bibset, value.c_str(),
 474                            (const char *) ptr->name + 7);
 475         }
 476     }
 477     return s;
 478 }
 479
 480 void yf::Zoom::Impl::configure_local_records(const xmlNode *ptr, bool test_only)
 481 {
 482     while (ptr && ptr->type != XML_ELEMENT_NODE)
 483         ptr = ptr->next;
 484
 485     if (ptr)
 486     {
 487         if (!strcmp((const char *) ptr->name, "records"))
 488         {
 489             for (ptr = ptr->children; ptr; ptr = ptr->next)
 490             {
 491                 if (ptr->type != XML_ELEMENT_NODE)
 492                     continue;
 493                 if (!strcmp((const char *) ptr->name, "record"))
 494                 {
 495                     SearchablePtr s = parse_torus_record(ptr);
 496                     if (s)
 497                     {
 498                         std::string udb = s->udb;
 499                         if (udb.length())
 500                             s_map[s->udb] = s;
 501                         else
 502                         {
 503                             throw mp::filter::FilterException
 504                                 ("No udb for local torus record");
 505                         }
 506                     }
 507                 }
 508                 else
 509                 {
 510                     throw mp::filter::FilterException
 511                         ("Bad element "
 512                          + std::string((const char *) ptr->name)
 513                          + " in zoom filter inside element "
 514                          "<torus><records>");
 515                 }
 516             }
 517         }
 518         else
 519         {
 520             throw mp::filter::FilterException
 521                 ("Bad element "
 522                  + std::string((const char *) ptr->name)
 523                  + " in zoom filter inside element <torus>");
 524         }
 525     }
 526 }
 527
 528 void yf::Zoom::Impl::configure(const xmlNode *ptr, bool test_only,
 529                                const char *path)
 530 {
 531     content_tmp_file = "/tmp/cf.XXXXXX.p";
 532     if (path && *path)
 533     {
 534         file_path = path;
 535     }
 536     for (ptr = ptr->children; ptr; ptr = ptr->next)
 537     {
 538         if (ptr->type != XML_ELEMENT_NODE)
 539             continue;
 540         else if (!strcmp((const char *) ptr->name, "torus"))
 541         {
 542             const struct _xmlAttr *attr;
 543             for (attr = ptr->properties; attr; attr = attr->next)
 544             {
 545                 if (!strcmp((const char *) attr->name, "url"))
 546                     torus_url = mp::xml::get_text(attr->children);
 547                 else if (!strcmp((const char *) attr->name, "xsldir"))
 548                     xsldir = mp::xml::get_text(attr->children);
 549                 else if (!strcmp((const char *) attr->name, "element_transform"))
 550                     element_transform = mp::xml::get_text(attr->children);
 551                 else if (!strcmp((const char *) attr->name, "element_raw"))
 552                     element_raw = mp::xml::get_text(attr->children);
 553                 else
 554                     throw mp::filter::FilterException(
 555                         "Bad attribute " + std::string((const char *)
 556                                                        attr->name));
 557             }
 558             configure_local_records(ptr->children, test_only);
 559         }
 560         else if (!strcmp((const char *) ptr->name, "cclmap"))
 561         {
 562             const char *addinfo = 0;
 563             ccl_xml_config(bibset, ptr, &addinfo);
 564         }
 565         else if (!strcmp((const char *) ptr->name, "fieldmap"))
 566         {
 567             const struct _xmlAttr *attr;
 568             std::string ccl_field;
 569             std::string cql_field;
 570             for (attr = ptr->properties; attr; attr = attr->next)
 571             {
 572                 if (!strcmp((const char *) attr->name, "ccl"))
 573                     ccl_field = mp::xml::get_text(attr->children);
 574                 else if (!strcmp((const char *) attr->name, "cql"))
 575                     cql_field = mp::xml::get_text(attr->children);
 576                 else
 577                     throw mp::filter::FilterException(
 578                         "Bad attribute " + std::string((const char *)
 579                                                        attr->name));
 580             }
 581             if (cql_field.length())
 582                 fieldmap[cql_field] = ccl_field;
 583         }
 584         else if (!strcmp((const char *) ptr->name, "contentProxy"))
 585         {
 586             const struct _xmlAttr *attr;
 587             for (attr = ptr->properties; attr; attr = attr->next)
 588             {
 589                 if (!strcmp((const char *) attr->name, "server"))
 590                     content_proxy_server = mp::xml::get_text(attr->children);
 591                 else if (!strcmp((const char *) attr->name, "tmp_file"))
 592                     content_tmp_file = mp::xml::get_text(attr->children);
 593                 else
 594                     throw mp::filter::FilterException(
 595                         "Bad attribute " + std::string((const char *)
 596                                                        attr->name));
 597             }
 598         }
 599         else if (!strcmp((const char *) ptr->name, "log"))
 600         {
 601             const struct _xmlAttr *attr;
 602             for (attr = ptr->properties; attr; attr = attr->next)
 603             {
 604                 if (!strcmp((const char *) attr->name, "apdu"))
 605                     apdu_log = mp::xml::get_bool(attr->children, false);
 606                 else
 607                     throw mp::filter::FilterException(
 608                         "Bad attribute " + std::string((const char *)
 609                                                        attr->name));
 610             }
 611         }
 612         else
 613         {
 614             throw mp::filter::FilterException
 615                 ("Bad element "
 616                  + std::string((const char *) ptr->name)
 617                  + " in zoom filter");
 618         }
 619     }
 620 }
 621
 622 yf::Zoom::BackendPtr yf::Zoom::Frontend::get_backend_from_databases(
 623     std::string &database, int *error, char **addinfo, ODR odr)
 624 {
 625     std::list<BackendPtr>::const_iterator map_it;
 626     if (m_backend && m_backend->m_frontend_database == database)
 627         return m_backend;
 628
 629     std::string db_args;
 630     std::string torus_db;
 631     size_t db_arg_pos = database.find(',');
 632     if (db_arg_pos != std::string::npos)
 633     {
 634         torus_db = database.substr(0, db_arg_pos);
 635         db_args = database.substr(db_arg_pos + 1);
 636     }
 637     else
 638         torus_db = database;
 639
 640     SearchablePtr sptr;
 641
 642     std::map<std::string,SearchablePtr>::iterator it;
 643     it = m_p->s_map.find(torus_db);
 644     if (it != m_p->s_map.end())
 645         sptr = it->second;
 646     else
 647     {
 648         xmlDoc *doc = mp::get_searchable(m_p->torus_url, torus_db);
 649         if (!doc)
 650         {
 651             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 652             *addinfo = odr_strdup(odr, database.c_str());
 653             BackendPtr b;
 654             return b;
 655         }
 656         const xmlNode *ptr = xmlDocGetRootElement(doc);
 657         if (ptr)
 658         {   // presumably ptr is a records element node
 659             // parse first record in document
 660             for (ptr = ptr->children; ptr; ptr = ptr->next)
 661             {
 662                 if (ptr->type == XML_ELEMENT_NODE
 663                     && !strcmp((const char *) ptr->name, "record"))
 664                 {
 665                     sptr = m_p->parse_torus_record(ptr);
 666                     break;
 667                 }
 668             }
 669         }
 670         xmlFreeDoc(doc);
 671     }
 672
 673     if (!sptr)
 674     {
 675         *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 676         *addinfo = odr_strdup(odr, database.c_str());
 677         BackendPtr b;
 678         return b;
 679     }
 680
 681     xsltStylesheetPtr xsp = 0;
 682     if (sptr->transform_xsl_fname.length())
 683     {
 684         const char *path = 0;
 685
 686         if (m_p->xsldir.length())
 687             path = m_p->xsldir.c_str();
 688         else
 689             path = m_p->file_path.c_str();
 690         std::string fname;
 691
 692         char fullpath[1024];
 693         char *cp = yaz_filepath_resolve(sptr->transform_xsl_fname.c_str(),
 694                                         path, 0, fullpath);
 695         if (cp)
 696             fname.assign(cp);
 697         else
 698         {
 699             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 700             *addinfo = (char *)
 701                 odr_malloc(odr, 40 + sptr->transform_xsl_fname.length());
 702             sprintf(*addinfo, "File could not be read: %s",
 703                     sptr->transform_xsl_fname.c_str());
 704             BackendPtr b;
 705             return b;
 706         }
 707         xmlDoc *xsp_doc = xmlParseFile(fname.c_str());
 708         if (!xsp_doc)
 709         {
 710             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 711             *addinfo = (char *) odr_malloc(odr, 40 + fname.length());
 712             sprintf(*addinfo, "xmlParseFile failed. File: %s", fname.c_str());
 713             BackendPtr b;
 714             return b;
 715         }
 716         xsp = xsltParseStylesheetDoc(xsp_doc);
 717         if (!xsp)
 718         {
 719             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 720             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 721             BackendPtr b;
 722             xmlFreeDoc(xsp_doc);
 723             return b;
 724         }
 725     }
 726
 727     m_backend.reset();
 728
 729     BackendPtr b(new Backend(sptr));
 730
 731     b->xsp = xsp;
 732     b->m_frontend_database = database;
 733
 734     if (sptr->query_encoding.length())
 735         b->set_option("rpnCharset", sptr->query_encoding);
 736
 737     b->set_option("timeout", "40");
 738
 739     if (m_p->apdu_log)
 740         b->set_option("apdulog", "1");
 741
 742     if (sptr->piggyback)
 743         b->set_option("count", "10");
 744     b->set_option("piggyback", sptr->piggyback ? "1" : "0");
 745
 746     std::string authentication = sptr->authentication;
 747     std::string proxy = sptr->cfProxy;
 748
 749     const char *param_user = 0;
 750     const char *param_password = 0;
 751     const char *param_proxy = 0;
 752     if (db_args.length())
 753     {
 754         char **names;
 755         char **values;
 756         int i;
 757         int no_parms = yaz_uri_to_array(db_args.c_str(),
 758                                         odr, &names, &values);
 759         for (i = 0; i < no_parms; i++)
 760         {
 761             const char *name = names[i];
 762             const char *value = values[i];
 763             if (!strcmp(name, "user"))
 764                 param_user = value;
 765             else if (!strcmp(name, "password"))
 766                 param_password = value;
 767             else if (!strcmp(name, "proxy"))
 768                 param_proxy = value;
 769             else if (!strcmp(name, "cproxysession"))
 770                 ;
 771             else
 772             {
 773                 BackendPtr notfound;
 774                 char *msg = (char*) odr_malloc(odr, strlen(name) + 30);
 775                 *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 776                 sprintf(msg, "Bad database argument: %s", name);
 777                 *addinfo = msg;
 778                 return notfound;
 779             }
 780         }
 781         if (param_user)
 782         {
 783             authentication = std::string(param_user);
 784             if (param_password)
 785                 authentication += "/" + std::string(param_password);
 786         }
 787         if (param_proxy)
 788             proxy = param_proxy;
 789     }
 790
 791     if (sptr->cfAuth.length())
 792     {
 793         // A CF target
 794         b->set_option("user", sptr->cfAuth);
 795         if (!param_user && !param_password && authentication.length())
 796         {
 797             if (db_args.length())
 798                 db_args += "&";
 799             // no database (auth) args specified already.. and the
 800             // Torus authentication has it.. Generate the args that CF
 801             // understands..
 802             size_t found = authentication.find('/');
 803             if (found != std::string::npos)
 804             {
 805                 db_args += "user=" +
 806                     mp::util::uri_encode(authentication.substr(0, found))
 807                     + "&password=" +
 808                     mp::util::uri_encode(authentication.substr(found+1));
 809             }
 810             else
 811                 db_args += "user=" + mp::util::uri_encode(authentication);
 812         }
 813         if (!param_proxy && proxy.length())
 814         {
 815             if (db_args.length())
 816                 db_args += "&";
 817             db_args += "proxy=" + mp::util::uri_encode(proxy);
 818         }
 819         if (sptr->cfSubDb.length())
 820         {
 821             if (db_args.length())
 822                 db_args += "&";
 823             db_args += "subdatabase=" + mp::util::uri_encode(sptr->cfSubDb);
 824         }
 825     }
 826     else
 827     {
 828         db_args.clear(); // no arguments to be passed (non-CF)
 829
 830         size_t found = authentication.find('/');
 831
 832         if (sptr->sru.length() && found != std::string::npos)
 833         {
 834             b->set_option("user", authentication.substr(0, found));
 835             b->set_option("password", authentication.substr(found+1));
 836         }
 837         else
 838             b->set_option("user", authentication);
 839
 840         if (proxy.length())
 841             b->set_option("proxy", proxy);
 842     }
 843     if (b->sptr->contentConnector.length())
 844     {
 845         char *fname = (char *) xmalloc(m_p->content_tmp_file.length() + 8);
 846         strcpy(fname, m_p->content_tmp_file.c_str());
 847         char *xx = strstr(fname, "XXXXXX");
 848         if (!xx)
 849         {
 850             xx = fname + strlen(fname);
 851             strcat(fname, "XXXXXX");
 852         }
 853         char tmp_char = xx[6];
 854         sprintf(xx, "%06d", ((unsigned) rand()) % 1000000);
 855         xx[6] = tmp_char;
 856
 857         int fd = creat(fname, 0666);
 858         if (fd == -1)
 859         {
 860             yaz_log(YLOG_WARN|YLOG_ERRNO, "create %s", fname);
 861             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 862             *addinfo = (char *)  odr_malloc(odr, 40 + strlen(fname));
 863             sprintf(*addinfo, "Could not create %s", fname);
 864             xfree(fname);
 865             BackendPtr backend_null;
 866             return backend_null;
 867         }
 868         b->content_session_id.assign(xx, 6);
 869         WRBUF w = wrbuf_alloc();
 870         wrbuf_puts(w, "#content_proxy\n");
 871         wrbuf_printf(w, "connector: %s\n", b->sptr->contentConnector.c_str());
 872         if (authentication.length())
 873             wrbuf_printf(w, "authentication: %s\n", authentication.c_str());
 874         if (proxy.length())
 875             wrbuf_printf(w, "proxy: %s\n", proxy.c_str());
 876         if (sptr->cfAuth.length())
 877             wrbuf_printf(w, "cfauth: %s\n", sptr->cfAuth.c_str());
 878         if (sptr->cfProxy.length())
 879             wrbuf_printf(w, "cfproxy: %s\n", sptr->cfProxy.c_str());
 880
 881         write(fd, wrbuf_buf(w), wrbuf_len(w));
 882         close(fd);
 883         yaz_log(YLOG_LOG, "file %s created\n", fname);
 884         xfree(fname);
 885     }
 886
 887     std::string url;
 888     if (sptr->sru.length())
 889     {
 890         url = "http://" + sptr->target;
 891         b->set_option("sru", sptr->sru);
 892     }
 893     else
 894     {
 895         url = sptr->target;
 896     }
 897     if (db_args.length())
 898         url += "," + db_args;
 899     yaz_log(YLOG_LOG, "url=%s", url.c_str());
 900     b->connect(url, error, addinfo, odr);
 901     if (*error == 0)
 902     {
 903         m_backend = b;
 904     }
 905     return b;
 906 }
 907
 908 Z_Records *yf::Zoom::Frontend::get_records(Odr_int start,
 909                                            Odr_int number_to_present,
 910                                            int *error,
 911                                            char **addinfo,
 912                                            Odr_int *number_of_records_returned,
 913                                            ODR odr,
 914                                            BackendPtr b,
 915                                            Odr_oid *preferredRecordSyntax,
 916                                            const char *element_set_name)
 917 {
 918     *number_of_records_returned = 0;
 919     Z_Records *records = 0;
 920     bool enable_pz2_retrieval = false; // whether target profile is used
 921     bool enable_pz2_transform = false; // whether XSLT is used as well
 922     bool assume_marc8_charset = false;
 923
 924     if (start < 0 || number_to_present <= 0)
 925         return records;
 926
 927     if (number_to_present > 10000)
 928         number_to_present = 10000;
 929
 930     ZOOM_record *recs = (ZOOM_record *)
 931         odr_malloc(odr, (size_t) number_to_present * sizeof(*recs));
 932
 933     char oid_name_str[OID_STR_MAX];
 934     const char *syntax_name = 0;
 935
 936     if (preferredRecordSyntax &&
 937         !oid_oidcmp(preferredRecordSyntax, yaz_oid_recsyn_xml)
 938         && element_set_name)
 939     {
 940         if (!strcmp(element_set_name, m_p->element_transform.c_str()))
 941         {
 942             enable_pz2_retrieval = true;
 943             enable_pz2_transform = true;
 944         }
 945         else if (!strcmp(element_set_name, m_p->element_raw.c_str()))
 946         {
 947             enable_pz2_retrieval = true;
 948         }
 949     }
 950
 951     if (enable_pz2_retrieval)
 952     {
 953         if (b->sptr->request_syntax.length())
 954         {
 955             syntax_name = b->sptr->request_syntax.c_str();
 956             const Odr_oid *syntax_oid =
 957                 yaz_string_to_oid(yaz_oid_std(), CLASS_RECSYN, syntax_name);
 958             if (!oid_oidcmp(syntax_oid, yaz_oid_recsyn_usmarc)
 959                 || !oid_oidcmp(syntax_oid, yaz_oid_recsyn_opac))
 960                 assume_marc8_charset = true;
 961         }
 962     }
 963     else if (preferredRecordSyntax)
 964         syntax_name =
 965             yaz_oid_to_string_buf(preferredRecordSyntax, 0, oid_name_str);
 966
 967     b->set_option("preferredRecordSyntax", syntax_name);
 968
 969     if (enable_pz2_retrieval)
 970     {
 971         element_set_name = 0;
 972         if (b->sptr->element_set.length())
 973             element_set_name = b->sptr->element_set.c_str();
 974     }
 975
 976     b->set_option("elementSetName", element_set_name);
 977
 978     b->present(start, number_to_present, recs, error, addinfo, odr);
 979
 980     int i = 0;
 981     if (!*error)
 982     {
 983         for (i = 0; i < number_to_present; i++)
 984             if (!recs[i])
 985                 break;
 986     }
 987     if (i > 0)
 988     {  // only return records if no error and at least one record
 989         char *odr_database = odr_strdup(odr,
 990                                         b->m_frontend_database.c_str());
 991         Z_NamePlusRecordList *npl = (Z_NamePlusRecordList *)
 992             odr_malloc(odr, sizeof(*npl));
 993         *number_of_records_returned = i;
 994         npl->num_records = i;
 995         npl->records = (Z_NamePlusRecord **)
 996             odr_malloc(odr, i * sizeof(*npl->records));
 997         for (i = 0; i < number_to_present; i++)
 998         {
 999             Z_NamePlusRecord *npr = 0;
1000             const char *addinfo;
1001             int sur_error = ZOOM_record_error(recs[i], 0 /* msg */,
1002                                               &addinfo, 0 /* diagset */);
1003
1004             if (sur_error)
1005             {
1006                 npr = zget_surrogateDiagRec(odr, odr_database, sur_error,
1007                                             addinfo);
1008             }
1009             else if (enable_pz2_retrieval)
1010             {
1011                 char rec_type_str[100];
1012                 const char *record_encoding = 0;
1013
1014                 if (b->sptr->record_encoding.length())
1015                     record_encoding = b->sptr->record_encoding.c_str();
1016                 else if (assume_marc8_charset)
1017                     record_encoding = "marc8";
1018
1019                 strcpy(rec_type_str, b->sptr->use_turbomarc ? "txml" : "xml");
1020                 if (record_encoding)
1021                 {
1022                     strcat(rec_type_str, "; charset=");
1023                     strcat(rec_type_str, record_encoding);
1024                 }
1025
1026                 int rec_len;
1027                 xmlChar *xmlrec_buf = 0;
1028                 const char *rec_buf = ZOOM_record_get(recs[i], rec_type_str,
1029                                                       &rec_len);
1030                 if (!rec_buf && !npr)
1031                 {
1032                     std::string addinfo("ZOOM_record_get failed for type ");
1033
1034                     addinfo += rec_type_str;
1035                     npr = zget_surrogateDiagRec(
1036                         odr, odr_database,
1037                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1038                         addinfo.c_str());
1039                 }
1040
1041                 if (rec_buf && b->xsp && enable_pz2_transform)
1042                 {
1043                     xmlDoc *rec_doc = xmlParseMemory(rec_buf, rec_len);
1044                     if (!rec_doc)
1045                     {
1046                         npr = zget_surrogateDiagRec(
1047                             odr, odr_database,
1048                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1049                             "xml parse failed for record");
1050                     }
1051                     else
1052                     {
1053                         xmlDoc *rec_res =
1054                             xsltApplyStylesheet(b->xsp, rec_doc, 0);
1055
1056                         if (rec_res)
1057                         {
1058                             xsltSaveResultToString(&xmlrec_buf, &rec_len,
1059                                                    rec_res, b->xsp);
1060                             rec_buf = (const char *) xmlrec_buf;
1061
1062                             xmlFreeDoc(rec_res);
1063                         }
1064                         if (!rec_buf)
1065                         {
1066                             std::string addinfo;
1067
1068                             addinfo = "xslt apply failed for "
1069                                 + b->sptr->transform_xsl_fname;
1070                             npr = zget_surrogateDiagRec(
1071                                 odr, odr_database,
1072                                 YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1073                                 addinfo.c_str());
1074                         }
1075                         xmlFreeDoc(rec_doc);
1076                     }
1077                 }
1078
1079                 if (rec_buf)
1080                 {
1081                     xmlDoc *doc = xmlParseMemory(rec_buf, rec_len);
1082                     std::string res =
1083                         mp::xml::url_recipe_handle(doc, b->sptr->urlRecipe);
1084                     if (res.length() && b->content_session_id.length())
1085                     {
1086                         size_t off = res.find_first_of("://");
1087                         if (off != std::string::npos)
1088                         {
1089                             char tmp[1024];
1090                             sprintf(tmp, "%s.%s/",
1091                                     b->content_session_id.c_str(),
1092                                     m_p->content_proxy_server.c_str());
1093                             res.insert(off + 3, tmp);
1094                         }
1095                     }
1096                     if (res.length())
1097                     {
1098                         xmlNode *ptr = xmlDocGetRootElement(doc);
1099                         while (ptr && ptr->type != XML_ELEMENT_NODE)
1100                             ptr = ptr->next;
1101                         xmlNode *c =
1102                             xmlNewChild(ptr, 0, BAD_CAST "generated-url", 0);
1103                         xmlNode * t = xmlNewText(BAD_CAST res.c_str());
1104                         xmlAddChild(c, t);
1105
1106                         if (xmlrec_buf)
1107                             xmlFree(xmlrec_buf);
1108
1109                         xmlDocDumpMemory(doc, &xmlrec_buf, &rec_len);
1110                         rec_buf = (const char *) xmlrec_buf;
1111                     }
1112                     xmlFreeDoc(doc);
1113                 }
1114                 if (!npr)
1115                 {
1116                     if (!rec_buf)
1117                         npr = zget_surrogateDiagRec(
1118                             odr, odr_database,
1119                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1120                             rec_type_str);
1121                     else
1122                     {
1123                         npr = (Z_NamePlusRecord *)
1124                             odr_malloc(odr, sizeof(*npr));
1125                         npr->databaseName = odr_database;
1126                         npr->which = Z_NamePlusRecord_databaseRecord;
1127                         npr->u.databaseRecord =
1128                             z_ext_record_xml(odr, rec_buf, rec_len);
1129                     }
1130                 }
1131                 if (xmlrec_buf)
1132                     xmlFree(xmlrec_buf);
1133             }
1134             else
1135             {
1136                 Z_External *ext =
1137                     (Z_External *) ZOOM_record_get(recs[i], "ext", 0);
1138                 if (ext)
1139                 {
1140                     npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
1141                     npr->databaseName = odr_database;
1142                     npr->which = Z_NamePlusRecord_databaseRecord;
1143                     npr->u.databaseRecord = ext;
1144                 }
1145                 else
1146                 {
1147                     npr = zget_surrogateDiagRec(
1148                         odr, odr_database,
1149                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1150                         "ZOOM_record, type ext");
1151                 }
1152             }
1153             npl->records[i] = npr;
1154         }
1155         records = (Z_Records*) odr_malloc(odr, sizeof(*records));
1156         records->which = Z_Records_DBOSD;
1157         records->u.databaseOrSurDiagnostics = npl;
1158     }
1159     return records;
1160 }
1161
1162 struct cql_node *yf::Zoom::Impl::convert_cql_fields(struct cql_node *cn,
1163                                                     ODR odr)
1164 {
1165     struct cql_node *r = 0;
1166     if (!cn)
1167         return 0;
1168     switch (cn->which)
1169     {
1170     case CQL_NODE_ST:
1171         if (cn->u.st.index)
1172         {
1173             std::map<std::string,std::string>::const_iterator it;
1174             it = fieldmap.find(cn->u.st.index);
1175             if (it == fieldmap.end())
1176                 return cn;
1177             if (it->second.length())
1178                 cn->u.st.index = odr_strdup(odr, it->second.c_str());
1179             else
1180                 cn->u.st.index = 0;
1181         }
1182         break;
1183     case CQL_NODE_BOOL:
1184         r = convert_cql_fields(cn->u.boolean.left, odr);
1185         if (!r)
1186             r = convert_cql_fields(cn->u.boolean.right, odr);
1187         break;
1188     case CQL_NODE_SORT:
1189         r = convert_cql_fields(cn->u.sort.search, odr);
1190         break;
1191     }
1192     return r;
1193 }
1194
1195 static void sort_pqf_type_7(WRBUF pqf_wrbuf, const char *sru_sortkeys)
1196 {
1197     /* sortkey layour: path,schema,ascending,caseSensitive,missingValue */
1198     /* see cql_sortby_to_sortkeys of YAZ. */
1199     char **sortspec;
1200     int num_sortspec = 0;
1201     int i;
1202     NMEM nmem = nmem_create();
1203
1204     if (sru_sortkeys)
1205         nmem_strsplit_blank(nmem, sru_sortkeys, &sortspec, &num_sortspec);
1206     if (num_sortspec > 0)
1207     {
1208         WRBUF w = wrbuf_alloc();
1209         for (i = 0; i < num_sortspec; i++)
1210         {
1211             char **arg;
1212             int num_arg;
1213             int ascending = 1;
1214             nmem_strsplitx(nmem, ",", sortspec[i], &arg, &num_arg, 0);
1215
1216             if (num_arg > 2 && arg[2][0])
1217                 ascending = atoi(arg[2]);
1218
1219             wrbuf_puts(w, "@or @attr 1=");
1220             yaz_encode_pqf_term(w, arg[0], strlen(arg[0]));
1221             wrbuf_printf(w, "@attr 7=%d %d ", ascending ? 1 : 2, i);
1222         }
1223         if (wrbuf_len(w))
1224         {
1225             wrbuf_puts(w, wrbuf_cstr(pqf_wrbuf));
1226             wrbuf_rewind(pqf_wrbuf);
1227             wrbuf_puts(pqf_wrbuf, wrbuf_cstr(w));
1228         }
1229         wrbuf_destroy(w);
1230     }
1231     nmem_destroy(nmem);
1232 }
1233
1234 static void sort_via_cql(WRBUF cql_sortby, const char *sru_sortkeys)
1235 {
1236     /* sortkey layour: path,schema,ascending,caseSensitive,missingValue */
1237     /* see cql_sortby_to_sortkeys of YAZ. */
1238     char **sortspec;
1239     int num_sortspec = 0;
1240     int i;
1241     NMEM nmem = nmem_create();
1242
1243     if (sru_sortkeys)
1244         nmem_strsplit_blank(nmem, sru_sortkeys, &sortspec, &num_sortspec);
1245     if (num_sortspec > 0)
1246     {
1247         WRBUF w = wrbuf_alloc();
1248         for (i = 0; i < num_sortspec; i++)
1249         {
1250             char **arg;
1251             int num_arg;
1252             int ascending = 1;
1253             int case_sensitive = 0;
1254             const char *missing = 0;
1255             nmem_strsplitx(nmem, ",", sortspec[i], &arg, &num_arg, 0);
1256
1257             if (num_arg > 2 && arg[2][0])
1258                 ascending = atoi(arg[2]);
1259             if (num_arg > 3 && arg[3][0])
1260                 case_sensitive = atoi(arg[3]);
1261             if (num_arg > 4 && arg[4][0])
1262                 missing = arg[4];
1263             if (i > 0)
1264                 wrbuf_puts(w, " ");
1265             else
1266                 wrbuf_puts(w, " sortby ");
1267             wrbuf_puts(w, arg[0]);  /* field */
1268             wrbuf_puts(w, "/");
1269             wrbuf_puts(w, ascending ? "ascending" : "descending");
1270             if (case_sensitive)
1271                 wrbuf_puts(w, "/respectCase");
1272             if (missing)
1273             {
1274                 if (!strcmp(missing, "omit"))
1275                     wrbuf_puts(w, "/missingOmit");
1276                 else if (!strcmp(missing, "abort"))
1277                     wrbuf_puts(w, "/missingFail");
1278                 else if (!strcmp(missing, "lowValue"))
1279                     wrbuf_puts(w, "/missingLow");
1280                 else if (!strcmp(missing, "highValue"))
1281                     wrbuf_puts(w, "/missingHigh");
1282             }
1283         }
1284         if (wrbuf_len(w))
1285             wrbuf_puts(cql_sortby, wrbuf_cstr(w));
1286         wrbuf_destroy(w);
1287     }
1288     nmem_destroy(nmem);
1289 }
1290
1291 #if YAZ_VERSIONL < 0x40206
1292 static void wrbuf_vp_puts(const char *buf, void *client_data)
1293 {
1294     WRBUF b = (WRBUF) client_data;
1295     wrbuf_puts(b, buf);
1296 }
1297 #endif
1298
1299 void yf::Zoom::Frontend::handle_search(mp::Package &package)
1300 {
1301     Z_GDU *gdu = package.request().get();
1302     Z_APDU *apdu_req = gdu->u.z3950;
1303     Z_APDU *apdu_res = 0;
1304     mp::odr odr;
1305     Z_SearchRequest *sr = apdu_req->u.searchRequest;
1306     if (sr->num_databaseNames != 1)
1307     {
1308         apdu_res = odr.create_searchResponse(
1309             apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
1310         package.response() = apdu_res;
1311         return;
1312     }
1313
1314     int error = 0;
1315     char *addinfo = 0;
1316     std::string db(sr->databaseNames[0]);
1317     BackendPtr b = get_backend_from_databases(db, &error, &addinfo, odr);
1318     if (error)
1319     {
1320         apdu_res =
1321             odr.create_searchResponse(apdu_req, error, addinfo);
1322         package.response() = apdu_res;
1323         return;
1324     }
1325
1326     b->set_option("setname", "default");
1327
1328     Odr_int hits = 0;
1329     Z_Query *query = sr->query;
1330     WRBUF ccl_wrbuf = 0;
1331     WRBUF pqf_wrbuf = 0;
1332     std::string sru_sortkeys;
1333
1334     if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
1335     {
1336         // RPN
1337         pqf_wrbuf = wrbuf_alloc();
1338         yaz_rpnquery_to_wrbuf(pqf_wrbuf, query->u.type_1);
1339     }
1340     else if (query->which == Z_Query_type_2)
1341     {
1342         // CCL
1343         ccl_wrbuf = wrbuf_alloc();
1344         wrbuf_write(ccl_wrbuf, (const char *) query->u.type_2->buf,
1345                     query->u.type_2->len);
1346     }
1347     else if (query->which == Z_Query_type_104 &&
1348              query->u.type_104->which == Z_External_CQL)
1349     {
1350         // CQL
1351         const char *cql = query->u.type_104->u.cql;
1352         CQL_parser cp = cql_parser_create();
1353         int r = cql_parser_string(cp, cql);
1354         if (r)
1355         {
1356             cql_parser_destroy(cp);
1357             apdu_res =
1358                 odr.create_searchResponse(apdu_req,
1359                                           YAZ_BIB1_MALFORMED_QUERY,
1360                                           "CQL syntax error");
1361             package.response() = apdu_res;
1362             return;
1363         }
1364         struct cql_node *cn = cql_parser_result(cp);
1365         struct cql_node *cn_error = m_p->convert_cql_fields(cn, odr);
1366         if (cn_error)
1367         {
1368             // hopefully we are getting a ptr to a index+relation+term node
1369             addinfo = 0;
1370             if (cn_error->which == CQL_NODE_ST)
1371                 addinfo = cn_error->u.st.index;
1372
1373             apdu_res =
1374                 odr.create_searchResponse(apdu_req,
1375                                           YAZ_BIB1_UNSUPP_USE_ATTRIBUTE,
1376                                           addinfo);
1377             package.response() = apdu_res;
1378             return;
1379         }
1380         char ccl_buf[1024];
1381
1382         r = cql_to_ccl_buf(cn, ccl_buf, sizeof(ccl_buf));
1383         if (r == 0)
1384         {
1385             ccl_wrbuf = wrbuf_alloc();
1386             wrbuf_puts(ccl_wrbuf, ccl_buf);
1387
1388             WRBUF sru_sortkeys_wrbuf = wrbuf_alloc();
1389
1390             cql_sortby_to_sortkeys(cn, wrbuf_vp_puts, sru_sortkeys_wrbuf);
1391
1392             sru_sortkeys.assign(wrbuf_cstr(sru_sortkeys_wrbuf));
1393             wrbuf_destroy(sru_sortkeys_wrbuf);
1394         }
1395         cql_parser_destroy(cp);
1396         if (r)
1397         {
1398             apdu_res =
1399                 odr.create_searchResponse(apdu_req,
1400                                           YAZ_BIB1_MALFORMED_QUERY,
1401                                           "CQL to CCL conversion error");
1402             package.response() = apdu_res;
1403             return;
1404         }
1405     }
1406     else
1407     {
1408         apdu_res =
1409             odr.create_searchResponse(apdu_req, YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
1410         package.response() = apdu_res;
1411         return;
1412     }
1413
1414     if (ccl_wrbuf)
1415     {
1416         // CCL to PQF
1417         assert(pqf_wrbuf == 0);
1418         int cerror, cpos;
1419         struct ccl_rpn_node *cn;
1420         yaz_log(YLOG_LOG, "CCL: %s", wrbuf_cstr(ccl_wrbuf));
1421         cn = ccl_find_str(b->sptr->ccl_bibset, wrbuf_cstr(ccl_wrbuf),
1422                           &cerror, &cpos);
1423         wrbuf_destroy(ccl_wrbuf);
1424         if (!cn)
1425         {
1426             char *addinfo = odr_strdup(odr, ccl_err_msg(cerror));
1427             int z3950_diag = YAZ_BIB1_MALFORMED_QUERY;
1428
1429             switch (cerror)
1430             {
1431             case CCL_ERR_UNKNOWN_QUAL:
1432                 z3950_diag = YAZ_BIB1_UNSUPP_USE_ATTRIBUTE;
1433                 break;
1434             case CCL_ERR_TRUNC_NOT_LEFT:
1435             case CCL_ERR_TRUNC_NOT_RIGHT:
1436             case CCL_ERR_TRUNC_NOT_BOTH:
1437                 z3950_diag = YAZ_BIB1_UNSUPP_TRUNCATION_ATTRIBUTE;
1438                 break;
1439             }
1440             apdu_res =
1441                 odr.create_searchResponse(apdu_req, z3950_diag, addinfo);
1442             package.response() = apdu_res;
1443             return;
1444         }
1445         pqf_wrbuf = wrbuf_alloc();
1446         ccl_pquery(pqf_wrbuf, cn);
1447         ccl_rpn_delete(cn);
1448     }
1449
1450     assert(pqf_wrbuf);
1451     if (b->get_option("sru"))
1452     {
1453         int status = 0;
1454         Z_RPNQuery *zquery;
1455         zquery = p_query_rpn(odr, wrbuf_cstr(pqf_wrbuf));
1456         WRBUF wrb = wrbuf_alloc();
1457
1458         if (!strcmp(b->get_option("sru"), "solr"))
1459         {
1460             solr_transform_t cqlt = solr_transform_create();
1461
1462             status = solr_transform_rpn2solr_wrbuf(cqlt, wrb, zquery);
1463
1464             solr_transform_close(cqlt);
1465         }
1466         else
1467         {
1468             cql_transform_t cqlt = cql_transform_create();
1469
1470             status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery);
1471
1472             cql_transform_close(cqlt);
1473
1474             if (status == 0)
1475                 sort_via_cql(wrb, sru_sortkeys.c_str());
1476         }
1477         if (status == 0)
1478         {
1479             yaz_log(YLOG_LOG, "search CQL: %s", wrbuf_cstr(wrb));
1480             b->search_cql(wrbuf_cstr(wrb), &hits, &error, &addinfo, odr);
1481         }
1482
1483         wrbuf_destroy(wrb);
1484         wrbuf_destroy(pqf_wrbuf);
1485         if (status)
1486         {
1487             apdu_res =
1488                 odr.create_searchResponse(apdu_req, YAZ_BIB1_MALFORMED_QUERY,
1489                                           "can not convert from RPN to CQL/SOLR");
1490             package.response() = apdu_res;
1491             return;
1492         }
1493     }
1494     else
1495     {
1496         sort_pqf_type_7(pqf_wrbuf, sru_sortkeys.c_str());
1497
1498         yaz_log(YLOG_LOG, "search PQF: %s", wrbuf_cstr(pqf_wrbuf));
1499         b->search_pqf(wrbuf_cstr(pqf_wrbuf), &hits, &error, &addinfo, odr);
1500         wrbuf_destroy(pqf_wrbuf);
1501     }
1502
1503     const char *element_set_name = 0;
1504     Odr_int number_to_present = 0;
1505     if (!error)
1506         mp::util::piggyback_sr(sr, hits, number_to_present, &element_set_name);
1507
1508     Odr_int number_of_records_returned = 0;
1509     Z_Records *records = get_records(
1510         0, number_to_present, &error, &addinfo,
1511         &number_of_records_returned, odr, b, sr->preferredRecordSyntax,
1512         element_set_name);
1513     apdu_res = odr.create_searchResponse(apdu_req, error, addinfo);
1514     if (records)
1515     {
1516         apdu_res->u.searchResponse->records = records;
1517         apdu_res->u.searchResponse->numberOfRecordsReturned =
1518             odr_intdup(odr, number_of_records_returned);
1519     }
1520     apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
1521     package.response() = apdu_res;
1522 }
1523
1524 void yf::Zoom::Frontend::handle_present(mp::Package &package)
1525 {
1526     Z_GDU *gdu = package.request().get();
1527     Z_APDU *apdu_req = gdu->u.z3950;
1528     Z_APDU *apdu_res = 0;
1529     Z_PresentRequest *pr = apdu_req->u.presentRequest;
1530
1531     mp::odr odr;
1532     if (!m_backend)
1533     {
1534         package.response() = odr.create_presentResponse(
1535             apdu_req, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST, 0);
1536         return;
1537     }
1538     const char *element_set_name = 0;
1539     Z_RecordComposition *comp = pr->recordComposition;
1540     if (comp && comp->which != Z_RecordComp_simple)
1541     {
1542         package.response() = odr.create_presentResponse(
1543             apdu_req,
1544             YAZ_BIB1_PRESENT_COMP_SPEC_PARAMETER_UNSUPP, 0);
1545         return;
1546     }
1547     if (comp && comp->u.simple->which == Z_ElementSetNames_generic)
1548         element_set_name = comp->u.simple->u.generic;
1549     Odr_int number_of_records_returned = 0;
1550     int error = 0;
1551     char *addinfo = 0;
1552     Z_Records *records = get_records(
1553         *pr->resultSetStartPoint - 1, *pr->numberOfRecordsRequested,
1554         &error, &addinfo, &number_of_records_returned, odr, m_backend,
1555         pr->preferredRecordSyntax, element_set_name);
1556
1557     apdu_res = odr.create_presentResponse(apdu_req, error, addinfo);
1558     if (records)
1559     {
1560         apdu_res->u.presentResponse->records = records;
1561         apdu_res->u.presentResponse->numberOfRecordsReturned =
1562             odr_intdup(odr, number_of_records_returned);
1563     }
1564     package.response() = apdu_res;
1565 }
1566
1567 void yf::Zoom::Frontend::handle_package(mp::Package &package)
1568 {
1569     Z_GDU *gdu = package.request().get();
1570     if (!gdu)
1571         ;
1572     else if (gdu->which == Z_GDU_Z3950)
1573     {
1574         Z_APDU *apdu_req = gdu->u.z3950;
1575         if (apdu_req->which == Z_APDU_initRequest)
1576         {
1577             mp::odr odr;
1578             package.response() = odr.create_close(
1579                 apdu_req,
1580                 Z_Close_protocolError,
1581                 "double init");
1582         }
1583         else if (apdu_req->which == Z_APDU_searchRequest)
1584         {
1585             handle_search(package);
1586         }
1587         else if (apdu_req->which == Z_APDU_presentRequest)
1588         {
1589             handle_present(package);
1590         }
1591         else
1592         {
1593             mp::odr odr;
1594             package.response() = odr.create_close(
1595                 apdu_req,
1596                 Z_Close_protocolError,
1597                 "zoom filter cannot handle this APDU");
1598             package.session().close();
1599         }
1600     }
1601     else
1602     {
1603         package.session().close();
1604     }
1605 }
1606
1607 void yf::Zoom::Impl::process(mp::Package &package)
1608 {
1609     FrontendPtr f = get_frontend(package);
1610     Z_GDU *gdu = package.request().get();
1611
1612     if (f->m_is_virtual)
1613     {
1614         f->handle_package(package);
1615     }
1616     else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1617              Z_APDU_initRequest)
1618     {
1619         Z_InitRequest *req = gdu->u.z3950->u.initRequest;
1620         f->m_init_gdu = gdu;
1621
1622         mp::odr odr;
1623         Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
1624         Z_InitResponse *resp = apdu->u.initResponse;
1625
1626         int i;
1627         static const int masks[] = {
1628             Z_Options_search,
1629             Z_Options_present,
1630             -1
1631         };
1632         for (i = 0; masks[i] != -1; i++)
1633             if (ODR_MASK_GET(req->options, masks[i]))
1634                 ODR_MASK_SET(resp->options, masks[i]);
1635
1636         static const int versions[] = {
1637             Z_ProtocolVersion_1,
1638             Z_ProtocolVersion_2,
1639             Z_ProtocolVersion_3,
1640             -1
1641         };
1642         for (i = 0; versions[i] != -1; i++)
1643             if (ODR_MASK_GET(req->protocolVersion, versions[i]))
1644                 ODR_MASK_SET(resp->protocolVersion, versions[i]);
1645             else
1646                 break;
1647
1648         *resp->preferredMessageSize = *req->preferredMessageSize;
1649         *resp->maximumRecordSize = *req->maximumRecordSize;
1650
1651         package.response() = apdu;
1652         f->m_is_virtual = true;
1653     }
1654     else
1655         package.move();
1656
1657     release_frontend(package);
1658 }
1659
1660
1661 static mp::filter::Base* filter_creator()
1662 {
1663     return new mp::filter::Zoom;
1664 }
1665
1666 extern "C" {
1667     struct metaproxy_1_filter_struct metaproxy_1_filter_zoom = {
1668         0,
1669         "zoom",
1670         filter_creator
1671     };
1672 }
1673
1674
1675 /*
1676  * Local variables:
1677  * c-basic-offset: 4
1678  * c-file-style: "Stroustrup"
1679  * indent-tabs-mode: nil
1680  * End:
1681  * vim: shiftwidth=4 tabstop=8 expandtab
1682  */
1683