src/filter_zoom.cpp

   1 /* This file is part of Metaproxy.
   2    Copyright (C) 2005-2011 Index Data
   3
   4 Metaproxy is free software; you can redistribute it and/or modify it under
   5 the terms of the GNU General Public License as published by the Free
   6 Software Foundation; either version 2, or (at your option) any later
   7 version.
   8
   9 Metaproxy is distributed in the hope that it will be useful, but WITHOUT ANY
  10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17 */
  18
  19 #include "config.hpp"
  20
  21 #include <stdlib.h>
  22 #include <sys/types.h>
  23 #include "filter_zoom.hpp"
  24 #include <yaz/zoom.h>
  25 #include <yaz/yaz-version.h>
  26 #include <yaz/tpath.h>
  27 #include <yaz/srw.h>
  28 #include <metaproxy/package.hpp>
  29 #include <metaproxy/util.hpp>
  30 #include <metaproxy/xmlutil.hpp>
  31 #include "torus.hpp"
  32
  33 #include <libxslt/xsltutils.h>
  34 #include <libxslt/transform.h>
  35
  36 #include <boost/thread/mutex.hpp>
  37 #include <boost/thread/condition.hpp>
  38 #include <yaz/ccl_xml.h>
  39 #include <yaz/ccl.h>
  40 #include <yaz/rpn2cql.h>
  41 #include <yaz/rpn2solr.h>
  42 #include <yaz/pquery.h>
  43 #include <yaz/cql.h>
  44 #include <yaz/oid_db.h>
  45 #include <yaz/diagbib1.h>
  46 #include <yaz/log.h>
  47 #include <yaz/zgdu.h>
  48 #include <yaz/querytowrbuf.h>
  49
  50 namespace mp = metaproxy_1;
  51 namespace yf = mp::filter;
  52
  53 namespace metaproxy_1 {
  54     namespace filter {
  55         class Zoom::Searchable : boost::noncopyable {
  56           public:
  57             std::string authentication;
  58             std::string cfAuth;
  59             std::string cfProxy;
  60             std::string cfSubDb;
  61             std::string udb;
  62             std::string target;
  63             std::string query_encoding;
  64             std::string sru;
  65             std::string request_syntax;
  66             std::string element_set;
  67             std::string record_encoding;
  68             std::string transform_xsl_fname;
  69             std::string urlRecipe;
  70             std::string contentConnector;
  71             bool use_turbomarc;
  72             bool piggyback;
  73             CCL_bibset ccl_bibset;
  74             Searchable(CCL_bibset base);
  75             ~Searchable();
  76         };
  77         class Zoom::Backend : boost::noncopyable {
  78             friend class Impl;
  79             friend class Frontend;
  80             std::string zurl;
  81             ZOOM_connection m_connection;
  82             ZOOM_resultset m_resultset;
  83             std::string m_frontend_database;
  84             SearchablePtr sptr;
  85             xsltStylesheetPtr xsp;
  86             std::string content_session_id;
  87         public:
  88             Backend(SearchablePtr sptr);
  89             ~Backend();
  90             void connect(std::string zurl, int *error, char **addinfo,
  91                          ODR odr);
  92             void search_pqf(const char *pqf, Odr_int *hits,
  93                             int *error, char **addinfo, ODR odr);
  94             void search_cql(const char *cql, Odr_int *hits,
  95                             int *error, char **addinfo, ODR odr);
  96             void present(Odr_int start, Odr_int number, ZOOM_record *recs,
  97                          int *error, char **addinfo, ODR odr);
  98             void set_option(const char *name, const char *value);
  99             void set_option(const char *name, std::string value);
 100             const char *get_option(const char *name);
 101             void get_zoom_error(int *error, char **addinfo, ODR odr);
 102         };
 103         class Zoom::Frontend : boost::noncopyable {
 104             friend class Impl;
 105             Impl *m_p;
 106             bool m_is_virtual;
 107             bool m_in_use;
 108             yazpp_1::GDU m_init_gdu;
 109             BackendPtr m_backend;
 110             void handle_package(mp::Package &package);
 111             void handle_search(mp::Package &package);
 112             void handle_present(mp::Package &package);
 113             BackendPtr get_backend_from_databases(std::string &database,
 114                                                   int *error,
 115                                                   char **addinfo,
 116                                                   ODR odr);
 117             Z_Records *get_records(Odr_int start,
 118                                    Odr_int number_to_present,
 119                                    int *error,
 120                                    char **addinfo,
 121                                    Odr_int *number_of_records_returned,
 122                                    ODR odr, BackendPtr b,
 123                                    Odr_oid *preferredRecordSyntax,
 124                                    const char *element_set_name);
 125         public:
 126             Frontend(Impl *impl);
 127             ~Frontend();
 128         };
 129         class Zoom::Impl {
 130             friend class Frontend;
 131         public:
 132             Impl();
 133             ~Impl();
 134             void process(metaproxy_1::Package & package);
 135             void configure(const xmlNode * ptr, bool test_only,
 136                            const char *path);
 137         private:
 138             void configure_local_records(const xmlNode * ptr, bool test_only);
 139             FrontendPtr get_frontend(mp::Package &package);
 140             void release_frontend(mp::Package &package);
 141             SearchablePtr parse_torus_record(const xmlNode *ptr);
 142             struct cql_node *convert_cql_fields(struct cql_node *cn, ODR odr);
 143             std::map<mp::Session, FrontendPtr> m_clients;
 144             boost::mutex m_mutex;
 145             boost::condition m_cond_session_ready;
 146             std::string torus_url;
 147             std::map<std::string,std::string> fieldmap;
 148             std::string xsldir;
 149             std::string file_path;
 150             std::string content_proxy_server;
 151             std::string content_tmp_file;
 152             bool apdu_log;
 153             CCL_bibset bibset;
 154             std::string element_transform;
 155             std::string element_raw;
 156             std::string proxy;
 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 if (!strcmp((const char *) attr->name, "proxy"))
 554                     proxy = mp::xml::get_text(attr->children);
 555                 else
 556                     throw mp::filter::FilterException(
 557                         "Bad attribute " + std::string((const char *)
 558                                                        attr->name));
 559             }
 560             configure_local_records(ptr->children, test_only);
 561         }
 562         else if (!strcmp((const char *) ptr->name, "cclmap"))
 563         {
 564             const char *addinfo = 0;
 565             ccl_xml_config(bibset, ptr, &addinfo);
 566         }
 567         else if (!strcmp((const char *) ptr->name, "fieldmap"))
 568         {
 569             const struct _xmlAttr *attr;
 570             std::string ccl_field;
 571             std::string cql_field;
 572             for (attr = ptr->properties; attr; attr = attr->next)
 573             {
 574                 if (!strcmp((const char *) attr->name, "ccl"))
 575                     ccl_field = mp::xml::get_text(attr->children);
 576                 else if (!strcmp((const char *) attr->name, "cql"))
 577                     cql_field = mp::xml::get_text(attr->children);
 578                 else
 579                     throw mp::filter::FilterException(
 580                         "Bad attribute " + std::string((const char *)
 581                                                        attr->name));
 582             }
 583             if (cql_field.length())
 584                 fieldmap[cql_field] = ccl_field;
 585         }
 586         else if (!strcmp((const char *) ptr->name, "contentProxy"))
 587         {
 588             const struct _xmlAttr *attr;
 589             for (attr = ptr->properties; attr; attr = attr->next)
 590             {
 591                 if (!strcmp((const char *) attr->name, "server"))
 592                     content_proxy_server = mp::xml::get_text(attr->children);
 593                 else if (!strcmp((const char *) attr->name, "tmp_file"))
 594                     content_tmp_file = mp::xml::get_text(attr->children);
 595                 else
 596                     throw mp::filter::FilterException(
 597                         "Bad attribute " + std::string((const char *)
 598                                                        attr->name));
 599             }
 600         }
 601         else if (!strcmp((const char *) ptr->name, "log"))
 602         {
 603             const struct _xmlAttr *attr;
 604             for (attr = ptr->properties; attr; attr = attr->next)
 605             {
 606                 if (!strcmp((const char *) attr->name, "apdu"))
 607                     apdu_log = mp::xml::get_bool(attr->children, false);
 608                 else
 609                     throw mp::filter::FilterException(
 610                         "Bad attribute " + std::string((const char *)
 611                                                        attr->name));
 612             }
 613         }
 614         else
 615         {
 616             throw mp::filter::FilterException
 617                 ("Bad element "
 618                  + std::string((const char *) ptr->name)
 619                  + " in zoom filter");
 620         }
 621     }
 622 }
 623
 624 yf::Zoom::BackendPtr yf::Zoom::Frontend::get_backend_from_databases(
 625     std::string &database, int *error, char **addinfo, ODR odr)
 626 {
 627     std::list<BackendPtr>::const_iterator map_it;
 628     if (m_backend && m_backend->m_frontend_database == database)
 629         return m_backend;
 630
 631     std::string db_args;
 632     std::string torus_db;
 633     size_t db_arg_pos = database.find(',');
 634     if (db_arg_pos != std::string::npos)
 635     {
 636         torus_db = database.substr(0, db_arg_pos);
 637         db_args = database.substr(db_arg_pos + 1);
 638     }
 639     else
 640         torus_db = database;
 641
 642     SearchablePtr sptr;
 643
 644     std::map<std::string,SearchablePtr>::iterator it;
 645     it = m_p->s_map.find(torus_db);
 646     if (it != m_p->s_map.end())
 647         sptr = it->second;
 648     else
 649     {
 650         xmlDoc *doc = mp::get_searchable(m_p->torus_url, torus_db, m_p->proxy);
 651         if (!doc)
 652         {
 653             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 654             *addinfo = odr_strdup(odr, database.c_str());
 655             BackendPtr b;
 656             return b;
 657         }
 658         const xmlNode *ptr = xmlDocGetRootElement(doc);
 659         if (ptr)
 660         {   // presumably ptr is a records element node
 661             // parse first record in document
 662             for (ptr = ptr->children; ptr; ptr = ptr->next)
 663             {
 664                 if (ptr->type == XML_ELEMENT_NODE
 665                     && !strcmp((const char *) ptr->name, "record"))
 666                 {
 667                     if (sptr)
 668                     {
 669                         *error = YAZ_BIB1_UNSPECIFIED_ERROR;
 670                         *addinfo = (char*) odr_malloc(odr, 40 + database.length()),
 671                         sprintf(*addinfo, "multiple records for udb=%s",
 672                                  database.c_str());
 673                         xmlFreeDoc(doc);
 674                         BackendPtr b;
 675                         return b;
 676                     }
 677                     sptr = m_p->parse_torus_record(ptr);
 678                 }
 679             }
 680         }
 681         xmlFreeDoc(doc);
 682     }
 683
 684     if (!sptr)
 685     {
 686         *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 687         *addinfo = odr_strdup(odr, database.c_str());
 688         BackendPtr b;
 689         return b;
 690     }
 691
 692     xsltStylesheetPtr xsp = 0;
 693     if (sptr->transform_xsl_fname.length())
 694     {
 695         const char *path = 0;
 696
 697         if (m_p->xsldir.length())
 698             path = m_p->xsldir.c_str();
 699         else
 700             path = m_p->file_path.c_str();
 701         std::string fname;
 702
 703         char fullpath[1024];
 704         char *cp = yaz_filepath_resolve(sptr->transform_xsl_fname.c_str(),
 705                                         path, 0, fullpath);
 706         if (cp)
 707             fname.assign(cp);
 708         else
 709         {
 710             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 711             *addinfo = (char *)
 712                 odr_malloc(odr, 40 + sptr->transform_xsl_fname.length());
 713             sprintf(*addinfo, "File could not be read: %s",
 714                     sptr->transform_xsl_fname.c_str());
 715             BackendPtr b;
 716             return b;
 717         }
 718         xmlDoc *xsp_doc = xmlParseFile(fname.c_str());
 719         if (!xsp_doc)
 720         {
 721             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 722             *addinfo = (char *) odr_malloc(odr, 40 + fname.length());
 723             sprintf(*addinfo, "xmlParseFile failed. File: %s", fname.c_str());
 724             BackendPtr b;
 725             return b;
 726         }
 727         xsp = xsltParseStylesheetDoc(xsp_doc);
 728         if (!xsp)
 729         {
 730             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 731             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 732             BackendPtr b;
 733             xmlFreeDoc(xsp_doc);
 734             return b;
 735         }
 736     }
 737
 738     m_backend.reset();
 739
 740     BackendPtr b(new Backend(sptr));
 741
 742     b->xsp = xsp;
 743     b->m_frontend_database = database;
 744
 745     if (sptr->query_encoding.length())
 746         b->set_option("rpnCharset", sptr->query_encoding);
 747
 748     b->set_option("timeout", "40");
 749
 750     if (m_p->apdu_log)
 751         b->set_option("apdulog", "1");
 752
 753     if (sptr->piggyback)
 754         b->set_option("count", "10");
 755     b->set_option("piggyback", sptr->piggyback ? "1" : "0");
 756
 757     std::string authentication = sptr->authentication;
 758     std::string proxy = sptr->cfProxy;
 759
 760     const char *param_user = 0;
 761     const char *param_password = 0;
 762     const char *param_proxy = 0;
 763     if (db_args.length())
 764     {
 765         char **names;
 766         char **values;
 767         int i;
 768         int no_parms = yaz_uri_to_array(db_args.c_str(),
 769                                         odr, &names, &values);
 770         for (i = 0; i < no_parms; i++)
 771         {
 772             const char *name = names[i];
 773             const char *value = values[i];
 774             if (!strcmp(name, "user"))
 775                 param_user = value;
 776             else if (!strcmp(name, "password"))
 777                 param_password = value;
 778             else if (!strcmp(name, "proxy"))
 779                 param_proxy = value;
 780             else if (!strcmp(name, "cproxysession"))
 781                 ;
 782             else
 783             {
 784                 BackendPtr notfound;
 785                 char *msg = (char*) odr_malloc(odr, strlen(name) + 30);
 786                 *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 787                 sprintf(msg, "Bad database argument: %s", name);
 788                 *addinfo = msg;
 789                 return notfound;
 790             }
 791         }
 792         if (param_user)
 793         {
 794             authentication = std::string(param_user);
 795             if (param_password)
 796                 authentication += "/" + std::string(param_password);
 797         }
 798         if (param_proxy)
 799             proxy = param_proxy;
 800     }
 801
 802     if (sptr->cfAuth.length())
 803     {
 804         // A CF target
 805         b->set_option("user", sptr->cfAuth);
 806         if (!param_user && !param_password && authentication.length())
 807         {
 808             if (db_args.length())
 809                 db_args += "&";
 810             // no database (auth) args specified already.. and the
 811             // Torus authentication has it.. Generate the args that CF
 812             // understands..
 813             size_t found = authentication.find('/');
 814             if (found != std::string::npos)
 815             {
 816                 db_args += "user=" +
 817                     mp::util::uri_encode(authentication.substr(0, found))
 818                     + "&password=" +
 819                     mp::util::uri_encode(authentication.substr(found+1));
 820             }
 821             else
 822                 db_args += "user=" + mp::util::uri_encode(authentication);
 823         }
 824         if (!param_proxy && proxy.length())
 825         {
 826             if (db_args.length())
 827                 db_args += "&";
 828             db_args += "proxy=" + mp::util::uri_encode(proxy);
 829         }
 830         if (sptr->cfSubDb.length())
 831         {
 832             if (db_args.length())
 833                 db_args += "&";
 834             db_args += "subdatabase=" + mp::util::uri_encode(sptr->cfSubDb);
 835         }
 836     }
 837     else
 838     {
 839         db_args.clear(); // no arguments to be passed (non-CF)
 840
 841         size_t found = authentication.find('/');
 842
 843         if (sptr->sru.length() && found != std::string::npos)
 844         {
 845             b->set_option("user", authentication.substr(0, found));
 846             b->set_option("password", authentication.substr(found+1));
 847         }
 848         else
 849             b->set_option("user", authentication);
 850
 851         if (proxy.length())
 852             b->set_option("proxy", proxy);
 853     }
 854     if (b->sptr->contentConnector.length())
 855     {
 856         char *fname = (char *) xmalloc(m_p->content_tmp_file.length() + 8);
 857         strcpy(fname, m_p->content_tmp_file.c_str());
 858         char *xx = strstr(fname, "XXXXXX");
 859         if (!xx)
 860         {
 861             xx = fname + strlen(fname);
 862             strcat(fname, "XXXXXX");
 863         }
 864         char tmp_char = xx[6];
 865         sprintf(xx, "%06d", ((unsigned) rand()) % 1000000);
 866         xx[6] = tmp_char;
 867
 868         FILE *file = fopen(fname, "w");
 869         if (!file)
 870         {
 871             yaz_log(YLOG_WARN|YLOG_ERRNO, "create %s", fname);
 872             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 873             *addinfo = (char *)  odr_malloc(odr, 40 + strlen(fname));
 874             sprintf(*addinfo, "Could not create %s", fname);
 875             xfree(fname);
 876             BackendPtr backend_null;
 877             return backend_null;
 878         }
 879         b->content_session_id.assign(xx, 6);
 880         WRBUF w = wrbuf_alloc();
 881         wrbuf_puts(w, "#content_proxy\n");
 882         wrbuf_printf(w, "connector: %s\n", b->sptr->contentConnector.c_str());
 883         if (authentication.length())
 884             wrbuf_printf(w, "authentication: %s\n", authentication.c_str());
 885         if (proxy.length())
 886             wrbuf_printf(w, "proxy: %s\n", proxy.c_str());
 887         if (sptr->cfProxy.length())
 888             wrbuf_printf(w, "cfproxy: %s\n", sptr->cfProxy.c_str());
 889
 890         fwrite(wrbuf_buf(w), 1, wrbuf_len(w), file);
 891         fclose(file);
 892         yaz_log(YLOG_LOG, "file %s created\n", fname);
 893         xfree(fname);
 894     }
 895
 896     std::string url;
 897     if (sptr->sru.length())
 898     {
 899         url = "http://" + sptr->target;
 900         b->set_option("sru", sptr->sru);
 901     }
 902     else
 903     {
 904         url = sptr->target;
 905     }
 906     if (db_args.length())
 907         url += "," + db_args;
 908     yaz_log(YLOG_LOG, "url=%s", url.c_str());
 909     b->connect(url, error, addinfo, odr);
 910     if (*error == 0)
 911     {
 912         m_backend = b;
 913     }
 914     return b;
 915 }
 916
 917 Z_Records *yf::Zoom::Frontend::get_records(Odr_int start,
 918                                            Odr_int number_to_present,
 919                                            int *error,
 920                                            char **addinfo,
 921                                            Odr_int *number_of_records_returned,
 922                                            ODR odr,
 923                                            BackendPtr b,
 924                                            Odr_oid *preferredRecordSyntax,
 925                                            const char *element_set_name)
 926 {
 927     *number_of_records_returned = 0;
 928     Z_Records *records = 0;
 929     bool enable_pz2_retrieval = false; // whether target profile is used
 930     bool enable_pz2_transform = false; // whether XSLT is used as well
 931     bool assume_marc8_charset = false;
 932
 933     if (start < 0 || number_to_present <= 0)
 934         return records;
 935
 936     if (number_to_present > 10000)
 937         number_to_present = 10000;
 938
 939     ZOOM_record *recs = (ZOOM_record *)
 940         odr_malloc(odr, (size_t) number_to_present * sizeof(*recs));
 941
 942     char oid_name_str[OID_STR_MAX];
 943     const char *syntax_name = 0;
 944
 945     if (preferredRecordSyntax &&
 946         !oid_oidcmp(preferredRecordSyntax, yaz_oid_recsyn_xml)
 947         && element_set_name)
 948     {
 949         if (!strcmp(element_set_name, m_p->element_transform.c_str()))
 950         {
 951             enable_pz2_retrieval = true;
 952             enable_pz2_transform = true;
 953         }
 954         else if (!strcmp(element_set_name, m_p->element_raw.c_str()))
 955         {
 956             enable_pz2_retrieval = true;
 957         }
 958     }
 959
 960     if (enable_pz2_retrieval)
 961     {
 962         if (b->sptr->request_syntax.length())
 963         {
 964             syntax_name = b->sptr->request_syntax.c_str();
 965             const Odr_oid *syntax_oid =
 966                 yaz_string_to_oid(yaz_oid_std(), CLASS_RECSYN, syntax_name);
 967             if (!oid_oidcmp(syntax_oid, yaz_oid_recsyn_usmarc)
 968                 || !oid_oidcmp(syntax_oid, yaz_oid_recsyn_opac))
 969                 assume_marc8_charset = true;
 970         }
 971     }
 972     else if (preferredRecordSyntax)
 973         syntax_name =
 974             yaz_oid_to_string_buf(preferredRecordSyntax, 0, oid_name_str);
 975
 976     b->set_option("preferredRecordSyntax", syntax_name);
 977
 978     if (enable_pz2_retrieval)
 979     {
 980         element_set_name = 0;
 981         if (b->sptr->element_set.length())
 982             element_set_name = b->sptr->element_set.c_str();
 983     }
 984
 985     b->set_option("elementSetName", element_set_name);
 986
 987     b->present(start, number_to_present, recs, error, addinfo, odr);
 988
 989     int i = 0;
 990     if (!*error)
 991     {
 992         for (i = 0; i < number_to_present; i++)
 993             if (!recs[i])
 994                 break;
 995     }
 996     if (i > 0)
 997     {  // only return records if no error and at least one record
 998         char *odr_database = odr_strdup(odr,
 999                                         b->m_frontend_database.c_str());
1000         Z_NamePlusRecordList *npl = (Z_NamePlusRecordList *)
1001             odr_malloc(odr, sizeof(*npl));
1002         *number_of_records_returned = i;
1003         npl->num_records = i;
1004         npl->records = (Z_NamePlusRecord **)
1005             odr_malloc(odr, i * sizeof(*npl->records));
1006         for (i = 0; i < number_to_present; i++)
1007         {
1008             Z_NamePlusRecord *npr = 0;
1009             const char *addinfo;
1010             int sur_error = ZOOM_record_error(recs[i], 0 /* msg */,
1011                                               &addinfo, 0 /* diagset */);
1012
1013             if (sur_error)
1014             {
1015                 npr = zget_surrogateDiagRec(odr, odr_database, sur_error,
1016                                             addinfo);
1017             }
1018             else if (enable_pz2_retrieval)
1019             {
1020                 char rec_type_str[100];
1021                 const char *record_encoding = 0;
1022
1023                 if (b->sptr->record_encoding.length())
1024                     record_encoding = b->sptr->record_encoding.c_str();
1025                 else if (assume_marc8_charset)
1026                     record_encoding = "marc8";
1027
1028                 strcpy(rec_type_str, b->sptr->use_turbomarc ? "txml" : "xml");
1029                 if (record_encoding)
1030                 {
1031                     strcat(rec_type_str, "; charset=");
1032                     strcat(rec_type_str, record_encoding);
1033                 }
1034
1035                 int rec_len;
1036                 xmlChar *xmlrec_buf = 0;
1037                 const char *rec_buf = ZOOM_record_get(recs[i], rec_type_str,
1038                                                       &rec_len);
1039                 if (!rec_buf && !npr)
1040                 {
1041                     std::string addinfo("ZOOM_record_get failed for type ");
1042
1043                     addinfo += rec_type_str;
1044                     npr = zget_surrogateDiagRec(
1045                         odr, odr_database,
1046                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1047                         addinfo.c_str());
1048                 }
1049
1050                 if (rec_buf && b->xsp && enable_pz2_transform)
1051                 {
1052                     xmlDoc *rec_doc = xmlParseMemory(rec_buf, rec_len);
1053                     if (!rec_doc)
1054                     {
1055                         npr = zget_surrogateDiagRec(
1056                             odr, odr_database,
1057                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1058                             "xml parse failed for record");
1059                     }
1060                     else
1061                     {
1062                         xmlDoc *rec_res =
1063                             xsltApplyStylesheet(b->xsp, rec_doc, 0);
1064
1065                         if (rec_res)
1066                         {
1067                             xsltSaveResultToString(&xmlrec_buf, &rec_len,
1068                                                    rec_res, b->xsp);
1069                             rec_buf = (const char *) xmlrec_buf;
1070
1071                             xmlFreeDoc(rec_res);
1072                         }
1073                         if (!rec_buf)
1074                         {
1075                             std::string addinfo;
1076
1077                             addinfo = "xslt apply failed for "
1078                                 + b->sptr->transform_xsl_fname;
1079                             npr = zget_surrogateDiagRec(
1080                                 odr, odr_database,
1081                                 YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1082                                 addinfo.c_str());
1083                         }
1084                         xmlFreeDoc(rec_doc);
1085                     }
1086                 }
1087
1088                 if (rec_buf)
1089                 {
1090                     xmlDoc *doc = xmlParseMemory(rec_buf, rec_len);
1091                     std::string res =
1092                         mp::xml::url_recipe_handle(doc, b->sptr->urlRecipe);
1093                     if (res.length() && b->content_session_id.length())
1094                     {
1095                         size_t off = res.find_first_of("://");
1096                         if (off != std::string::npos)
1097                         {
1098                             char tmp[1024];
1099                             sprintf(tmp, "%s.%s/",
1100                                     b->content_session_id.c_str(),
1101                                     m_p->content_proxy_server.c_str());
1102                             res.insert(off + 3, tmp);
1103                         }
1104                     }
1105                     if (res.length())
1106                     {
1107                         xmlNode *ptr = xmlDocGetRootElement(doc);
1108                         while (ptr && ptr->type != XML_ELEMENT_NODE)
1109                             ptr = ptr->next;
1110                         xmlNode *c =
1111                             xmlNewChild(ptr, 0, BAD_CAST "generated-url", 0);
1112                         xmlNode * t = xmlNewText(BAD_CAST res.c_str());
1113                         xmlAddChild(c, t);
1114
1115                         if (xmlrec_buf)
1116                             xmlFree(xmlrec_buf);
1117
1118                         xmlDocDumpMemory(doc, &xmlrec_buf, &rec_len);
1119                         rec_buf = (const char *) xmlrec_buf;
1120                     }
1121                     xmlFreeDoc(doc);
1122                 }
1123                 if (!npr)
1124                 {
1125                     if (!rec_buf)
1126                         npr = zget_surrogateDiagRec(
1127                             odr, odr_database,
1128                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1129                             rec_type_str);
1130                     else
1131                     {
1132                         npr = (Z_NamePlusRecord *)
1133                             odr_malloc(odr, sizeof(*npr));
1134                         npr->databaseName = odr_database;
1135                         npr->which = Z_NamePlusRecord_databaseRecord;
1136                         npr->u.databaseRecord =
1137                             z_ext_record_xml(odr, rec_buf, rec_len);
1138                     }
1139                 }
1140                 if (xmlrec_buf)
1141                     xmlFree(xmlrec_buf);
1142             }
1143             else
1144             {
1145                 Z_External *ext =
1146                     (Z_External *) ZOOM_record_get(recs[i], "ext", 0);
1147                 if (ext)
1148                 {
1149                     npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
1150                     npr->databaseName = odr_database;
1151                     npr->which = Z_NamePlusRecord_databaseRecord;
1152                     npr->u.databaseRecord = ext;
1153                 }
1154                 else
1155                 {
1156                     npr = zget_surrogateDiagRec(
1157                         odr, odr_database,
1158                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1159                         "ZOOM_record, type ext");
1160                 }
1161             }
1162             npl->records[i] = npr;
1163         }
1164         records = (Z_Records*) odr_malloc(odr, sizeof(*records));
1165         records->which = Z_Records_DBOSD;
1166         records->u.databaseOrSurDiagnostics = npl;
1167     }
1168     return records;
1169 }
1170
1171 struct cql_node *yf::Zoom::Impl::convert_cql_fields(struct cql_node *cn,
1172                                                     ODR odr)
1173 {
1174     struct cql_node *r = 0;
1175     if (!cn)
1176         return 0;
1177     switch (cn->which)
1178     {
1179     case CQL_NODE_ST:
1180         if (cn->u.st.index)
1181         {
1182             std::map<std::string,std::string>::const_iterator it;
1183             it = fieldmap.find(cn->u.st.index);
1184             if (it == fieldmap.end())
1185                 return cn;
1186             if (it->second.length())
1187                 cn->u.st.index = odr_strdup(odr, it->second.c_str());
1188             else
1189                 cn->u.st.index = 0;
1190         }
1191         break;
1192     case CQL_NODE_BOOL:
1193         r = convert_cql_fields(cn->u.boolean.left, odr);
1194         if (!r)
1195             r = convert_cql_fields(cn->u.boolean.right, odr);
1196         break;
1197     case CQL_NODE_SORT:
1198         r = convert_cql_fields(cn->u.sort.search, odr);
1199         break;
1200     }
1201     return r;
1202 }
1203
1204 static void sort_pqf_type_7(WRBUF pqf_wrbuf, const char *sru_sortkeys)
1205 {
1206     /* sortkey layour: path,schema,ascending,caseSensitive,missingValue */
1207     /* see cql_sortby_to_sortkeys of YAZ. */
1208     char **sortspec;
1209     int num_sortspec = 0;
1210     int i;
1211     NMEM nmem = nmem_create();
1212
1213     if (sru_sortkeys)
1214         nmem_strsplit_blank(nmem, sru_sortkeys, &sortspec, &num_sortspec);
1215     if (num_sortspec > 0)
1216     {
1217         WRBUF w = wrbuf_alloc();
1218         for (i = 0; i < num_sortspec; i++)
1219         {
1220             char **arg;
1221             int num_arg;
1222             int ascending = 1;
1223             nmem_strsplitx(nmem, ",", sortspec[i], &arg, &num_arg, 0);
1224
1225             if (num_arg > 2 && arg[2][0])
1226                 ascending = atoi(arg[2]);
1227
1228             wrbuf_puts(w, "@or @attr 1=");
1229             yaz_encode_pqf_term(w, arg[0], strlen(arg[0]));
1230             wrbuf_printf(w, "@attr 7=%d %d ", ascending ? 1 : 2, i);
1231         }
1232         if (wrbuf_len(w))
1233         {
1234             wrbuf_puts(w, wrbuf_cstr(pqf_wrbuf));
1235             wrbuf_rewind(pqf_wrbuf);
1236             wrbuf_puts(pqf_wrbuf, wrbuf_cstr(w));
1237         }
1238         wrbuf_destroy(w);
1239     }
1240     nmem_destroy(nmem);
1241 }
1242
1243 static void sort_via_cql(WRBUF cql_sortby, const char *sru_sortkeys)
1244 {
1245     /* sortkey layour: path,schema,ascending,caseSensitive,missingValue */
1246     /* see cql_sortby_to_sortkeys of YAZ. */
1247     char **sortspec;
1248     int num_sortspec = 0;
1249     int i;
1250     NMEM nmem = nmem_create();
1251
1252     if (sru_sortkeys)
1253         nmem_strsplit_blank(nmem, sru_sortkeys, &sortspec, &num_sortspec);
1254     if (num_sortspec > 0)
1255     {
1256         WRBUF w = wrbuf_alloc();
1257         for (i = 0; i < num_sortspec; i++)
1258         {
1259             char **arg;
1260             int num_arg;
1261             int ascending = 1;
1262             int case_sensitive = 0;
1263             const char *missing = 0;
1264             nmem_strsplitx(nmem, ",", sortspec[i], &arg, &num_arg, 0);
1265
1266             if (num_arg > 2 && arg[2][0])
1267                 ascending = atoi(arg[2]);
1268             if (num_arg > 3 && arg[3][0])
1269                 case_sensitive = atoi(arg[3]);
1270             if (num_arg > 4 && arg[4][0])
1271                 missing = arg[4];
1272             if (i > 0)
1273                 wrbuf_puts(w, " ");
1274             else
1275                 wrbuf_puts(w, " sortby ");
1276             wrbuf_puts(w, arg[0]);  /* field */
1277             wrbuf_puts(w, "/");
1278             wrbuf_puts(w, ascending ? "ascending" : "descending");
1279             if (case_sensitive)
1280                 wrbuf_puts(w, "/respectCase");
1281             if (missing)
1282             {
1283                 if (!strcmp(missing, "omit"))
1284                     wrbuf_puts(w, "/missingOmit");
1285                 else if (!strcmp(missing, "abort"))
1286                     wrbuf_puts(w, "/missingFail");
1287                 else if (!strcmp(missing, "lowValue"))
1288                     wrbuf_puts(w, "/missingLow");
1289                 else if (!strcmp(missing, "highValue"))
1290                     wrbuf_puts(w, "/missingHigh");
1291             }
1292         }
1293         if (wrbuf_len(w))
1294             wrbuf_puts(cql_sortby, wrbuf_cstr(w));
1295         wrbuf_destroy(w);
1296     }
1297     nmem_destroy(nmem);
1298 }
1299
1300 #if YAZ_VERSIONL < 0x40206
1301 static void wrbuf_vp_puts(const char *buf, void *client_data)
1302 {
1303     WRBUF b = (WRBUF) client_data;
1304     wrbuf_puts(b, buf);
1305 }
1306 #endif
1307
1308 void yf::Zoom::Frontend::handle_search(mp::Package &package)
1309 {
1310     Z_GDU *gdu = package.request().get();
1311     Z_APDU *apdu_req = gdu->u.z3950;
1312     Z_APDU *apdu_res = 0;
1313     mp::odr odr;
1314     Z_SearchRequest *sr = apdu_req->u.searchRequest;
1315     if (sr->num_databaseNames != 1)
1316     {
1317         apdu_res = odr.create_searchResponse(
1318             apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
1319         package.response() = apdu_res;
1320         return;
1321     }
1322
1323     int error = 0;
1324     char *addinfo = 0;
1325     std::string db(sr->databaseNames[0]);
1326     BackendPtr b = get_backend_from_databases(db, &error, &addinfo, odr);
1327     if (error)
1328     {
1329         apdu_res =
1330             odr.create_searchResponse(apdu_req, error, addinfo);
1331         package.response() = apdu_res;
1332         return;
1333     }
1334
1335     b->set_option("setname", "default");
1336
1337     Odr_int hits = 0;
1338     Z_Query *query = sr->query;
1339     WRBUF ccl_wrbuf = 0;
1340     WRBUF pqf_wrbuf = 0;
1341     std::string sru_sortkeys;
1342
1343     if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
1344     {
1345         // RPN
1346         pqf_wrbuf = wrbuf_alloc();
1347         yaz_rpnquery_to_wrbuf(pqf_wrbuf, query->u.type_1);
1348     }
1349     else if (query->which == Z_Query_type_2)
1350     {
1351         // CCL
1352         ccl_wrbuf = wrbuf_alloc();
1353         wrbuf_write(ccl_wrbuf, (const char *) query->u.type_2->buf,
1354                     query->u.type_2->len);
1355     }
1356     else if (query->which == Z_Query_type_104 &&
1357              query->u.type_104->which == Z_External_CQL)
1358     {
1359         // CQL
1360         const char *cql = query->u.type_104->u.cql;
1361         CQL_parser cp = cql_parser_create();
1362         int r = cql_parser_string(cp, cql);
1363         if (r)
1364         {
1365             cql_parser_destroy(cp);
1366             apdu_res =
1367                 odr.create_searchResponse(apdu_req,
1368                                           YAZ_BIB1_MALFORMED_QUERY,
1369                                           "CQL syntax error");
1370             package.response() = apdu_res;
1371             return;
1372         }
1373         struct cql_node *cn = cql_parser_result(cp);
1374         struct cql_node *cn_error = m_p->convert_cql_fields(cn, odr);
1375         if (cn_error)
1376         {
1377             // hopefully we are getting a ptr to a index+relation+term node
1378             addinfo = 0;
1379             if (cn_error->which == CQL_NODE_ST)
1380                 addinfo = cn_error->u.st.index;
1381
1382             apdu_res =
1383                 odr.create_searchResponse(apdu_req,
1384                                           YAZ_BIB1_UNSUPP_USE_ATTRIBUTE,
1385                                           addinfo);
1386             package.response() = apdu_res;
1387             return;
1388         }
1389         char ccl_buf[1024];
1390
1391         r = cql_to_ccl_buf(cn, ccl_buf, sizeof(ccl_buf));
1392         if (r == 0)
1393         {
1394             ccl_wrbuf = wrbuf_alloc();
1395             wrbuf_puts(ccl_wrbuf, ccl_buf);
1396
1397             WRBUF sru_sortkeys_wrbuf = wrbuf_alloc();
1398
1399             cql_sortby_to_sortkeys(cn, wrbuf_vp_puts, sru_sortkeys_wrbuf);
1400
1401             sru_sortkeys.assign(wrbuf_cstr(sru_sortkeys_wrbuf));
1402             wrbuf_destroy(sru_sortkeys_wrbuf);
1403         }
1404         cql_parser_destroy(cp);
1405         if (r)
1406         {
1407             apdu_res =
1408                 odr.create_searchResponse(apdu_req,
1409                                           YAZ_BIB1_MALFORMED_QUERY,
1410                                           "CQL to CCL conversion error");
1411             package.response() = apdu_res;
1412             return;
1413         }
1414     }
1415     else
1416     {
1417         apdu_res =
1418             odr.create_searchResponse(apdu_req, YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
1419         package.response() = apdu_res;
1420         return;
1421     }
1422
1423     if (ccl_wrbuf)
1424     {
1425         // CCL to PQF
1426         assert(pqf_wrbuf == 0);
1427         int cerror, cpos;
1428         struct ccl_rpn_node *cn;
1429         yaz_log(YLOG_LOG, "CCL: %s", wrbuf_cstr(ccl_wrbuf));
1430         cn = ccl_find_str(b->sptr->ccl_bibset, wrbuf_cstr(ccl_wrbuf),
1431                           &cerror, &cpos);
1432         wrbuf_destroy(ccl_wrbuf);
1433         if (!cn)
1434         {
1435             char *addinfo = odr_strdup(odr, ccl_err_msg(cerror));
1436             int z3950_diag = YAZ_BIB1_MALFORMED_QUERY;
1437
1438             switch (cerror)
1439             {
1440             case CCL_ERR_UNKNOWN_QUAL:
1441                 z3950_diag = YAZ_BIB1_UNSUPP_USE_ATTRIBUTE;
1442                 break;
1443             case CCL_ERR_TRUNC_NOT_LEFT:
1444             case CCL_ERR_TRUNC_NOT_RIGHT:
1445             case CCL_ERR_TRUNC_NOT_BOTH:
1446                 z3950_diag = YAZ_BIB1_UNSUPP_TRUNCATION_ATTRIBUTE;
1447                 break;
1448             }
1449             apdu_res =
1450                 odr.create_searchResponse(apdu_req, z3950_diag, addinfo);
1451             package.response() = apdu_res;
1452             return;
1453         }
1454         pqf_wrbuf = wrbuf_alloc();
1455         ccl_pquery(pqf_wrbuf, cn);
1456         ccl_rpn_delete(cn);
1457     }
1458
1459     assert(pqf_wrbuf);
1460     if (b->get_option("sru"))
1461     {
1462         int status = 0;
1463         Z_RPNQuery *zquery;
1464         zquery = p_query_rpn(odr, wrbuf_cstr(pqf_wrbuf));
1465         WRBUF wrb = wrbuf_alloc();
1466
1467         if (!strcmp(b->get_option("sru"), "solr"))
1468         {
1469             solr_transform_t cqlt = solr_transform_create();
1470
1471             status = solr_transform_rpn2solr_wrbuf(cqlt, wrb, zquery);
1472
1473             solr_transform_close(cqlt);
1474         }
1475         else
1476         {
1477             cql_transform_t cqlt = cql_transform_create();
1478
1479             status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery);
1480
1481             cql_transform_close(cqlt);
1482
1483             if (status == 0)
1484                 sort_via_cql(wrb, sru_sortkeys.c_str());
1485         }
1486         if (status == 0)
1487         {
1488             yaz_log(YLOG_LOG, "search CQL: %s", wrbuf_cstr(wrb));
1489             b->search_cql(wrbuf_cstr(wrb), &hits, &error, &addinfo, odr);
1490         }
1491
1492         wrbuf_destroy(wrb);
1493         wrbuf_destroy(pqf_wrbuf);
1494         if (status)
1495         {
1496             apdu_res =
1497                 odr.create_searchResponse(apdu_req, YAZ_BIB1_MALFORMED_QUERY,
1498                                           "can not convert from RPN to CQL/SOLR");
1499             package.response() = apdu_res;
1500             return;
1501         }
1502     }
1503     else
1504     {
1505         sort_pqf_type_7(pqf_wrbuf, sru_sortkeys.c_str());
1506
1507         yaz_log(YLOG_LOG, "search PQF: %s", wrbuf_cstr(pqf_wrbuf));
1508         b->search_pqf(wrbuf_cstr(pqf_wrbuf), &hits, &error, &addinfo, odr);
1509         wrbuf_destroy(pqf_wrbuf);
1510     }
1511
1512     const char *element_set_name = 0;
1513     Odr_int number_to_present = 0;
1514     if (!error)
1515         mp::util::piggyback_sr(sr, hits, number_to_present, &element_set_name);
1516
1517     Odr_int number_of_records_returned = 0;
1518     Z_Records *records = get_records(
1519         0, number_to_present, &error, &addinfo,
1520         &number_of_records_returned, odr, b, sr->preferredRecordSyntax,
1521         element_set_name);
1522     apdu_res = odr.create_searchResponse(apdu_req, error, addinfo);
1523     if (records)
1524     {
1525         apdu_res->u.searchResponse->records = records;
1526         apdu_res->u.searchResponse->numberOfRecordsReturned =
1527             odr_intdup(odr, number_of_records_returned);
1528     }
1529     apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
1530     package.response() = apdu_res;
1531 }
1532
1533 void yf::Zoom::Frontend::handle_present(mp::Package &package)
1534 {
1535     Z_GDU *gdu = package.request().get();
1536     Z_APDU *apdu_req = gdu->u.z3950;
1537     Z_APDU *apdu_res = 0;
1538     Z_PresentRequest *pr = apdu_req->u.presentRequest;
1539
1540     mp::odr odr;
1541     if (!m_backend)
1542     {
1543         package.response() = odr.create_presentResponse(
1544             apdu_req, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST, 0);
1545         return;
1546     }
1547     const char *element_set_name = 0;
1548     Z_RecordComposition *comp = pr->recordComposition;
1549     if (comp && comp->which != Z_RecordComp_simple)
1550     {
1551         package.response() = odr.create_presentResponse(
1552             apdu_req,
1553             YAZ_BIB1_PRESENT_COMP_SPEC_PARAMETER_UNSUPP, 0);
1554         return;
1555     }
1556     if (comp && comp->u.simple->which == Z_ElementSetNames_generic)
1557         element_set_name = comp->u.simple->u.generic;
1558     Odr_int number_of_records_returned = 0;
1559     int error = 0;
1560     char *addinfo = 0;
1561     Z_Records *records = get_records(
1562         *pr->resultSetStartPoint - 1, *pr->numberOfRecordsRequested,
1563         &error, &addinfo, &number_of_records_returned, odr, m_backend,
1564         pr->preferredRecordSyntax, element_set_name);
1565
1566     apdu_res = odr.create_presentResponse(apdu_req, error, addinfo);
1567     if (records)
1568     {
1569         apdu_res->u.presentResponse->records = records;
1570         apdu_res->u.presentResponse->numberOfRecordsReturned =
1571             odr_intdup(odr, number_of_records_returned);
1572     }
1573     package.response() = apdu_res;
1574 }
1575
1576 void yf::Zoom::Frontend::handle_package(mp::Package &package)
1577 {
1578     Z_GDU *gdu = package.request().get();
1579     if (!gdu)
1580         ;
1581     else if (gdu->which == Z_GDU_Z3950)
1582     {
1583         Z_APDU *apdu_req = gdu->u.z3950;
1584         if (apdu_req->which == Z_APDU_initRequest)
1585         {
1586             mp::odr odr;
1587             package.response() = odr.create_close(
1588                 apdu_req,
1589                 Z_Close_protocolError,
1590                 "double init");
1591         }
1592         else if (apdu_req->which == Z_APDU_searchRequest)
1593         {
1594             handle_search(package);
1595         }
1596         else if (apdu_req->which == Z_APDU_presentRequest)
1597         {
1598             handle_present(package);
1599         }
1600         else
1601         {
1602             mp::odr odr;
1603             package.response() = odr.create_close(
1604                 apdu_req,
1605                 Z_Close_protocolError,
1606                 "zoom filter cannot handle this APDU");
1607             package.session().close();
1608         }
1609     }
1610     else
1611     {
1612         package.session().close();
1613     }
1614 }
1615
1616 void yf::Zoom::Impl::process(mp::Package &package)
1617 {
1618     FrontendPtr f = get_frontend(package);
1619     Z_GDU *gdu = package.request().get();
1620
1621     if (f->m_is_virtual)
1622     {
1623         f->handle_package(package);
1624     }
1625     else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1626              Z_APDU_initRequest)
1627     {
1628         Z_InitRequest *req = gdu->u.z3950->u.initRequest;
1629         f->m_init_gdu = gdu;
1630
1631         mp::odr odr;
1632         Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
1633         Z_InitResponse *resp = apdu->u.initResponse;
1634
1635         int i;
1636         static const int masks[] = {
1637             Z_Options_search,
1638             Z_Options_present,
1639             -1
1640         };
1641         for (i = 0; masks[i] != -1; i++)
1642             if (ODR_MASK_GET(req->options, masks[i]))
1643                 ODR_MASK_SET(resp->options, masks[i]);
1644
1645         static const int versions[] = {
1646             Z_ProtocolVersion_1,
1647             Z_ProtocolVersion_2,
1648             Z_ProtocolVersion_3,
1649             -1
1650         };
1651         for (i = 0; versions[i] != -1; i++)
1652             if (ODR_MASK_GET(req->protocolVersion, versions[i]))
1653                 ODR_MASK_SET(resp->protocolVersion, versions[i]);
1654             else
1655                 break;
1656
1657         *resp->preferredMessageSize = *req->preferredMessageSize;
1658         *resp->maximumRecordSize = *req->maximumRecordSize;
1659
1660         package.response() = apdu;
1661         f->m_is_virtual = true;
1662     }
1663     else
1664         package.move();
1665
1666     release_frontend(package);
1667 }
1668
1669
1670 static mp::filter::Base* filter_creator()
1671 {
1672     return new mp::filter::Zoom;
1673 }
1674
1675 extern "C" {
1676     struct metaproxy_1_filter_struct metaproxy_1_filter_zoom = {
1677         0,
1678         "zoom",
1679         filter_creator
1680     };
1681 }
1682
1683
1684 /*
1685  * Local variables:
1686  * c-basic-offset: 4
1687  * c-file-style: "Stroustrup"
1688  * indent-tabs-mode: nil
1689  * End:
1690  * vim: shiftwidth=4 tabstop=8 expandtab
1691  */
1692