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 #include <yaz/sortspec.h>
  50 #include <yaz/tokenizer.h>
  51
  52 namespace mp = metaproxy_1;
  53 namespace yf = mp::filter;
  54
  55 namespace metaproxy_1 {
  56     namespace filter {
  57         class Zoom::Searchable : boost::noncopyable {
  58           public:
  59             std::string authentication;
  60             std::string cfAuth;
  61             std::string cfProxy;
  62             std::string cfSubDB;
  63             std::string udb;
  64             std::string target;
  65             std::string query_encoding;
  66             std::string sru;
  67             std::string sru_version;
  68             std::string request_syntax;
  69             std::string element_set;
  70             std::string record_encoding;
  71             std::string transform_xsl_fname;
  72             std::string transform_xsl_content;
  73             std::string urlRecipe;
  74             std::string contentConnector;
  75             std::string sortStrategy;
  76             bool use_turbomarc;
  77             bool piggyback;
  78             CCL_bibset ccl_bibset;
  79             std::map<std::string, std::string> sortmap;
  80             Searchable(CCL_bibset base);
  81             ~Searchable();
  82         };
  83         class Zoom::Backend : boost::noncopyable {
  84             friend class Impl;
  85             friend class Frontend;
  86             std::string zurl;
  87             ZOOM_connection m_connection;
  88             ZOOM_resultset m_resultset;
  89             std::string m_frontend_database;
  90             SearchablePtr sptr;
  91             xsltStylesheetPtr xsp;
  92             std::string content_session_id;
  93         public:
  94             Backend(SearchablePtr sptr);
  95             ~Backend();
  96             void connect(std::string zurl, int *error, char **addinfo,
  97                          ODR odr);
  98             void search(ZOOM_query q, Odr_int *hits,
  99                         int *error, char **addinfo, ODR odr);
 100             void present(Odr_int start, Odr_int number, ZOOM_record *recs,
 101                          int *error, char **addinfo, ODR odr);
 102             void set_option(const char *name, const char *value);
 103             void set_option(const char *name, std::string value);
 104             const char *get_option(const char *name);
 105             void get_zoom_error(int *error, char **addinfo, ODR odr);
 106         };
 107         class Zoom::Frontend : boost::noncopyable {
 108             friend class Impl;
 109             Impl *m_p;
 110             bool m_is_virtual;
 111             bool m_in_use;
 112             yazpp_1::GDU m_init_gdu;
 113             BackendPtr m_backend;
 114             void handle_package(mp::Package &package);
 115             void handle_search(mp::Package &package);
 116             void handle_present(mp::Package &package);
 117             BackendPtr get_backend_from_databases(mp::Package &package,
 118                                                   std::string &database,
 119                                                   int *error,
 120                                                   char **addinfo,
 121                                                   ODR odr);
 122
 123
 124             void prepare_elements(BackendPtr b,
 125                                   Odr_oid *preferredRecordSyntax,
 126                                   const char *element_set_name,
 127                                   bool &enable_pz2_retrieval,
 128                                   bool &enable_pz2_transform,
 129                                   bool &assume_marc8_charset);
 130
 131             Z_Records *get_records(Odr_int start,
 132                                    Odr_int number_to_present,
 133                                    int *error,
 134                                    char **addinfo,
 135                                    Odr_int *number_of_records_returned,
 136                                    ODR odr, BackendPtr b,
 137                                    Odr_oid *preferredRecordSyntax,
 138                                    const char *element_set_name);
 139         public:
 140             Frontend(Impl *impl);
 141             ~Frontend();
 142         };
 143         class Zoom::Impl {
 144             friend class Frontend;
 145         public:
 146             Impl();
 147             ~Impl();
 148             void process(metaproxy_1::Package & package);
 149             void configure(const xmlNode * ptr, bool test_only,
 150                            const char *path);
 151         private:
 152             void configure_local_records(const xmlNode * ptr, bool test_only);
 153             FrontendPtr get_frontend(mp::Package &package);
 154             void release_frontend(mp::Package &package);
 155             SearchablePtr parse_torus_record(const xmlNode *ptr);
 156             struct cql_node *convert_cql_fields(struct cql_node *cn, ODR odr);
 157             std::map<mp::Session, FrontendPtr> m_clients;
 158             boost::mutex m_mutex;
 159             boost::condition m_cond_session_ready;
 160             std::string torus_url;
 161             std::string default_realm;
 162             std::map<std::string,std::string> fieldmap;
 163             std::string xsldir;
 164             std::string file_path;
 165             std::string content_proxy_server;
 166             std::string content_tmp_file;
 167             bool apdu_log;
 168             CCL_bibset bibset;
 169             std::string element_transform;
 170             std::string element_raw;
 171             std::string proxy;
 172             std::map<std::string,SearchablePtr> s_map;
 173         };
 174     }
 175 }
 176
 177 // define Pimpl wrapper forwarding to Impl
 178
 179 yf::Zoom::Zoom() : m_p(new Impl)
 180 {
 181 }
 182
 183 yf::Zoom::~Zoom()
 184 {  // must have a destructor because of boost::scoped_ptr
 185 }
 186
 187 void yf::Zoom::configure(const xmlNode *xmlnode, bool test_only,
 188                          const char *path)
 189 {
 190     m_p->configure(xmlnode, test_only, path);
 191 }
 192
 193 void yf::Zoom::process(mp::Package &package) const
 194 {
 195     m_p->process(package);
 196 }
 197
 198
 199 // define Implementation stuff
 200
 201 yf::Zoom::Backend::Backend(SearchablePtr ptr) : sptr(ptr)
 202 {
 203     m_connection = ZOOM_connection_create(0);
 204     m_resultset = 0;
 205     xsp = 0;
 206 }
 207
 208 yf::Zoom::Backend::~Backend()
 209 {
 210     if (xsp)
 211         xsltFreeStylesheet(xsp);
 212     ZOOM_connection_destroy(m_connection);
 213     ZOOM_resultset_destroy(m_resultset);
 214 }
 215
 216
 217 void yf::Zoom::Backend::get_zoom_error(int *error, char **addinfo,
 218                                        ODR odr)
 219 {
 220     const char *msg = 0;
 221     const char *zoom_addinfo = 0;
 222     const char *dset = 0;
 223     *error = ZOOM_connection_error_x(m_connection, &msg, &zoom_addinfo, &dset);
 224     if (*error)
 225     {
 226         if (*error >= ZOOM_ERROR_CONNECT)
 227         {
 228             // turn ZOOM diagnostic into a Bib-1 2: with addinfo=zoom err msg
 229             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 230             *addinfo = (char *) odr_malloc(
 231                 odr, 20 + strlen(msg) +
 232                 (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 233             strcpy(*addinfo, msg);
 234             if (zoom_addinfo)
 235             {
 236                 strcat(*addinfo, ": ");
 237                 strcat(*addinfo, zoom_addinfo);
 238                 strcat(*addinfo, " ");
 239             }
 240         }
 241         else
 242         {
 243             if (dset && !strcmp(dset, "info:srw/diagnostic/1"))
 244                 *error = yaz_diag_srw_to_bib1(*error);
 245             *addinfo = (char *) odr_malloc(
 246                 odr, 20 + (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 247             **addinfo = '\0';
 248             if (zoom_addinfo && *zoom_addinfo)
 249             {
 250                 strcpy(*addinfo, zoom_addinfo);
 251                 strcat(*addinfo, " ");
 252             }
 253             strcat(*addinfo, "(backend)");
 254         }
 255     }
 256 }
 257
 258 void yf::Zoom::Backend::connect(std::string zurl,
 259                                 int *error, char **addinfo,
 260                                 ODR odr)
 261 {
 262     ZOOM_connection_connect(m_connection, zurl.c_str(), 0);
 263     get_zoom_error(error, addinfo, odr);
 264 }
 265
 266 void yf::Zoom::Backend::search(ZOOM_query q, Odr_int *hits,
 267                                int *error, char **addinfo, ODR odr)
 268 {
 269     m_resultset = ZOOM_connection_search(m_connection, q);
 270     get_zoom_error(error, addinfo, odr);
 271     if (*error == 0)
 272         *hits = ZOOM_resultset_size(m_resultset);
 273     else
 274         *hits = 0;
 275 }
 276
 277 void yf::Zoom::Backend::present(Odr_int start, Odr_int number,
 278                                 ZOOM_record *recs,
 279                                 int *error, char **addinfo, ODR odr)
 280 {
 281     ZOOM_resultset_records(m_resultset, recs, start, number);
 282     get_zoom_error(error, addinfo, odr);
 283 }
 284
 285 void yf::Zoom::Backend::set_option(const char *name, const char *value)
 286 {
 287     ZOOM_connection_option_set(m_connection, name, value);
 288     if (m_resultset)
 289         ZOOM_resultset_option_set(m_resultset, name, value);
 290 }
 291
 292 void yf::Zoom::Backend::set_option(const char *name, std::string value)
 293 {
 294     set_option(name, value.c_str());
 295 }
 296
 297 const char *yf::Zoom::Backend::get_option(const char *name)
 298 {
 299     return ZOOM_connection_option_get(m_connection, name);
 300 }
 301
 302 yf::Zoom::Searchable::Searchable(CCL_bibset base)
 303 {
 304     piggyback = true;
 305     use_turbomarc = true;
 306     sortStrategy = "embed";
 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, "SRUVersion"))
 430         {
 431             s->sru_version = mp::xml::get_text(ptr);
 432         }
 433         else if (!strcmp((const char *) ptr->name,
 434                          "queryEncoding"))
 435         {
 436             s->query_encoding = mp::xml::get_text(ptr);
 437         }
 438         else if (!strcmp((const char *) ptr->name,
 439                          "piggyback"))
 440         {
 441             s->piggyback = mp::xml::get_bool(ptr, true);
 442         }
 443         else if (!strcmp((const char *) ptr->name,
 444                          "requestSyntax"))
 445         {
 446             s->request_syntax = mp::xml::get_text(ptr);
 447         }
 448         else if (!strcmp((const char *) ptr->name,
 449                          "elementSet"))
 450         {
 451             s->element_set = mp::xml::get_text(ptr);
 452         }
 453         else if (!strcmp((const char *) ptr->name,
 454                          "recordEncoding"))
 455         {
 456             s->record_encoding = mp::xml::get_text(ptr);
 457         }
 458         else if (!strcmp((const char *) ptr->name,
 459                          "transform"))
 460         {
 461             s->transform_xsl_fname = mp::xml::get_text(ptr);
 462         }
 463         else if (!strcmp((const char *) ptr->name,
 464                          "literalTransform"))
 465         {
 466             s->transform_xsl_content = mp::xml::get_text(ptr);
 467         }
 468         else if (!strcmp((const char *) ptr->name,
 469                          "urlRecipe"))
 470         {
 471             s->urlRecipe = mp::xml::get_text(ptr);
 472         }
 473         else if (!strcmp((const char *) ptr->name,
 474                          "useTurboMarc"))
 475         {
 476             ; // useTurboMarc is ignored
 477         }
 478         else if (!strncmp((const char *) ptr->name,
 479                           "cclmap_", 7))
 480         {
 481             std::string value = mp::xml::get_text(ptr);
 482             ccl_qual_fitem(s->ccl_bibset, value.c_str(),
 483                            (const char *) ptr->name + 7);
 484         }
 485         else if (!strncmp((const char *) ptr->name,
 486                           "sortmap_", 8))
 487         {
 488             std::string value = mp::xml::get_text(ptr);
 489             s->sortmap[(const char *) ptr->name + 8] = value;
 490         }
 491         else if (!strcmp((const char *) ptr->name,
 492                           "sortStrategy"))
 493         {
 494             s->sortStrategy = mp::xml::get_text(ptr);
 495         }
 496     }
 497     return s;
 498 }
 499
 500 void yf::Zoom::Impl::configure_local_records(const xmlNode *ptr, bool test_only)
 501 {
 502     while (ptr && ptr->type != XML_ELEMENT_NODE)
 503         ptr = ptr->next;
 504
 505     if (ptr)
 506     {
 507         if (!strcmp((const char *) ptr->name, "records"))
 508         {
 509             for (ptr = ptr->children; ptr; ptr = ptr->next)
 510             {
 511                 if (ptr->type != XML_ELEMENT_NODE)
 512                     continue;
 513                 if (!strcmp((const char *) ptr->name, "record"))
 514                 {
 515                     SearchablePtr s = parse_torus_record(ptr);
 516                     if (s)
 517                     {
 518                         std::string udb = s->udb;
 519                         if (udb.length())
 520                             s_map[s->udb] = s;
 521                         else
 522                         {
 523                             throw mp::filter::FilterException
 524                                 ("No udb for local torus record");
 525                         }
 526                     }
 527                 }
 528                 else
 529                 {
 530                     throw mp::filter::FilterException
 531                         ("Bad element "
 532                          + std::string((const char *) ptr->name)
 533                          + " in zoom filter inside element "
 534                          "<torus><records>");
 535                 }
 536             }
 537         }
 538         else
 539         {
 540             throw mp::filter::FilterException
 541                 ("Bad element "
 542                  + std::string((const char *) ptr->name)
 543                  + " in zoom filter inside element <torus>");
 544         }
 545     }
 546 }
 547
 548 void yf::Zoom::Impl::configure(const xmlNode *ptr, bool test_only,
 549                                const char *path)
 550 {
 551     content_tmp_file = "/tmp/cf.XXXXXX.p";
 552     if (path && *path)
 553     {
 554         file_path = path;
 555     }
 556     for (ptr = ptr->children; ptr; ptr = ptr->next)
 557     {
 558         if (ptr->type != XML_ELEMENT_NODE)
 559             continue;
 560         else if (!strcmp((const char *) ptr->name, "torus"))
 561         {
 562             const struct _xmlAttr *attr;
 563             for (attr = ptr->properties; attr; attr = attr->next)
 564             {
 565                 if (!strcmp((const char *) attr->name, "url"))
 566                     torus_url = mp::xml::get_text(attr->children);
 567                 else if (!strcmp((const char *) attr->name, "realm"))
 568                     default_realm = mp::xml::get_text(attr->children);
 569                 else if (!strcmp((const char *) attr->name, "xsldir"))
 570                     xsldir = mp::xml::get_text(attr->children);
 571                 else if (!strcmp((const char *) attr->name, "element_transform"))
 572                     element_transform = mp::xml::get_text(attr->children);
 573                 else if (!strcmp((const char *) attr->name, "element_raw"))
 574                     element_raw = mp::xml::get_text(attr->children);
 575                 else if (!strcmp((const char *) attr->name, "proxy"))
 576                     proxy = mp::xml::get_text(attr->children);
 577                 else
 578                     throw mp::filter::FilterException(
 579                         "Bad attribute " + std::string((const char *)
 580                                                        attr->name));
 581             }
 582             configure_local_records(ptr->children, test_only);
 583         }
 584         else if (!strcmp((const char *) ptr->name, "cclmap"))
 585         {
 586             const char *addinfo = 0;
 587             ccl_xml_config(bibset, ptr, &addinfo);
 588         }
 589         else if (!strcmp((const char *) ptr->name, "fieldmap"))
 590         {
 591             const struct _xmlAttr *attr;
 592             std::string ccl_field;
 593             std::string cql_field;
 594             for (attr = ptr->properties; attr; attr = attr->next)
 595             {
 596                 if (!strcmp((const char *) attr->name, "ccl"))
 597                     ccl_field = mp::xml::get_text(attr->children);
 598                 else if (!strcmp((const char *) attr->name, "cql"))
 599                     cql_field = mp::xml::get_text(attr->children);
 600                 else
 601                     throw mp::filter::FilterException(
 602                         "Bad attribute " + std::string((const char *)
 603                                                        attr->name));
 604             }
 605             if (cql_field.length())
 606                 fieldmap[cql_field] = ccl_field;
 607         }
 608         else if (!strcmp((const char *) ptr->name, "contentProxy"))
 609         {
 610             const struct _xmlAttr *attr;
 611             for (attr = ptr->properties; attr; attr = attr->next)
 612             {
 613                 if (!strcmp((const char *) attr->name, "server"))
 614                     content_proxy_server = mp::xml::get_text(attr->children);
 615                 else if (!strcmp((const char *) attr->name, "tmp_file"))
 616                     content_tmp_file = mp::xml::get_text(attr->children);
 617                 else
 618                     throw mp::filter::FilterException(
 619                         "Bad attribute " + std::string((const char *)
 620                                                        attr->name));
 621             }
 622         }
 623         else if (!strcmp((const char *) ptr->name, "log"))
 624         {
 625             const struct _xmlAttr *attr;
 626             for (attr = ptr->properties; attr; attr = attr->next)
 627             {
 628                 if (!strcmp((const char *) attr->name, "apdu"))
 629                     apdu_log = mp::xml::get_bool(attr->children, false);
 630                 else
 631                     throw mp::filter::FilterException(
 632                         "Bad attribute " + std::string((const char *)
 633                                                        attr->name));
 634             }
 635         }
 636         else
 637         {
 638             throw mp::filter::FilterException
 639                 ("Bad element "
 640                  + std::string((const char *) ptr->name)
 641                  + " in zoom filter");
 642         }
 643     }
 644 }
 645
 646 yf::Zoom::BackendPtr yf::Zoom::Frontend::get_backend_from_databases(
 647     mp::Package &package,
 648     std::string &database, int *error, char **addinfo, ODR odr)
 649 {
 650     std::list<BackendPtr>::const_iterator map_it;
 651     if (m_backend && m_backend->m_frontend_database == database)
 652         return m_backend;
 653
 654     std::string input_args;
 655     std::string torus_db;
 656     size_t db_arg_pos = database.find(',');
 657     if (db_arg_pos != std::string::npos)
 658     {
 659         torus_db = database.substr(0, db_arg_pos);
 660         input_args = database.substr(db_arg_pos + 1);
 661     }
 662     else
 663         torus_db = database;
 664
 665     std::string authentication;
 666     std::string proxy;
 667     std::string realm = m_p->default_realm;
 668
 669     const char *param_user = 0;
 670     const char *param_password = 0;
 671     int no_parms = 0;
 672
 673     char **names;
 674     char **values;
 675     int no_out_args = 0;
 676     if (input_args.length())
 677         no_parms = yaz_uri_to_array(input_args.c_str(),
 678                                     odr, &names, &values);
 679     // adding 10 because we'll be adding other URL args
 680     const char **out_names = (const char **)
 681         odr_malloc(odr, (10 + no_parms) * sizeof(*out_names));
 682     const char **out_values = (const char **)
 683         odr_malloc(odr, (10 + no_parms) * sizeof(*out_values));
 684
 685     int i;
 686     for (i = 0; i < no_parms; i++)
 687     {
 688         const char *name = names[i];
 689         const char *value = values[i];
 690         assert(name);
 691         assert(value);
 692         if (!strcmp(name, "user"))
 693             param_user = value;
 694         else if (!strcmp(name, "password"))
 695             param_password = value;
 696         else if (!strcmp(name, "proxy"))
 697             proxy = value;
 698         else if (!strcmp(name, "cproxysession"))
 699         {
 700             out_names[no_out_args] = name;
 701             out_values[no_out_args++] = value;
 702         }
 703         else if (!strcmp(name, "realm"))
 704             realm = value;
 705         else if (name[0] == 'x' && name[1] == '-')
 706         {
 707             out_names[no_out_args] = name;
 708             out_values[no_out_args++] = value;
 709         }
 710         else
 711         {
 712             BackendPtr notfound;
 713             char *msg = (char*) odr_malloc(odr, strlen(name) + 30);
 714             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 715             sprintf(msg, "Bad database argument: %s", name);
 716             *addinfo = msg;
 717             return notfound;
 718         }
 719     }
 720     if (param_user)
 721     {
 722         authentication = std::string(param_user);
 723         if (param_password)
 724             authentication += "/" + std::string(param_password);
 725     }
 726     SearchablePtr sptr;
 727
 728     std::map<std::string,SearchablePtr>::iterator it;
 729     it = m_p->s_map.find(torus_db);
 730     if (it != m_p->s_map.end())
 731         sptr = it->second;
 732     else if (m_p->torus_url.length() > 0)
 733     {
 734         xmlDoc *doc = mp::get_searchable(m_p->torus_url, torus_db, realm,
 735                                          m_p->proxy);
 736         if (!doc)
 737         {
 738             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 739             *addinfo = odr_strdup(odr, database.c_str());
 740             BackendPtr b;
 741             return b;
 742         }
 743         const xmlNode *ptr = xmlDocGetRootElement(doc);
 744         if (ptr)
 745         {   // presumably ptr is a records element node
 746             // parse first record in document
 747             for (ptr = ptr->children; ptr; ptr = ptr->next)
 748             {
 749                 if (ptr->type == XML_ELEMENT_NODE
 750                     && !strcmp((const char *) ptr->name, "record"))
 751                 {
 752                     if (sptr)
 753                     {
 754                         *error = YAZ_BIB1_UNSPECIFIED_ERROR;
 755                         *addinfo = (char*) odr_malloc(odr, 40 + database.length()),
 756                         sprintf(*addinfo, "multiple records for udb=%s",
 757                                  database.c_str());
 758                         xmlFreeDoc(doc);
 759                         BackendPtr b;
 760                         return b;
 761                     }
 762                     sptr = m_p->parse_torus_record(ptr);
 763                 }
 764             }
 765         }
 766         xmlFreeDoc(doc);
 767     }
 768
 769     if (!sptr)
 770     {
 771         *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 772         *addinfo = odr_strdup(odr, database.c_str());
 773         BackendPtr b;
 774         return b;
 775     }
 776
 777     xsltStylesheetPtr xsp = 0;
 778     if (sptr->transform_xsl_content.length())
 779     {
 780         xmlDoc *xsp_doc = xmlParseMemory(sptr->transform_xsl_content.c_str(),
 781                                          sptr->transform_xsl_content.length());
 782         if (!xsp_doc)
 783         {
 784             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 785             *addinfo = (char *) odr_malloc(odr, 40);
 786             sprintf(*addinfo, "xmlParseMemory failed");
 787             BackendPtr b;
 788             return b;
 789         }
 790         xsp = xsltParseStylesheetDoc(xsp_doc);
 791         if (!xsp)
 792         {
 793             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 794             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 795             BackendPtr b;
 796             xmlFreeDoc(xsp_doc);
 797             return b;
 798         }
 799     }
 800     else if (sptr->transform_xsl_fname.length())
 801     {
 802         const char *path = 0;
 803
 804         if (m_p->xsldir.length())
 805             path = m_p->xsldir.c_str();
 806         else
 807             path = m_p->file_path.c_str();
 808         std::string fname;
 809
 810         char fullpath[1024];
 811         char *cp = yaz_filepath_resolve(sptr->transform_xsl_fname.c_str(),
 812                                         path, 0, fullpath);
 813         if (cp)
 814             fname.assign(cp);
 815         else
 816         {
 817             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 818             *addinfo = (char *)
 819                 odr_malloc(odr, 40 + sptr->transform_xsl_fname.length());
 820             sprintf(*addinfo, "File could not be read: %s",
 821                     sptr->transform_xsl_fname.c_str());
 822             BackendPtr b;
 823             return b;
 824         }
 825         xmlDoc *xsp_doc = xmlParseFile(fname.c_str());
 826         if (!xsp_doc)
 827         {
 828             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 829             *addinfo = (char *) odr_malloc(odr, 40 + fname.length());
 830             sprintf(*addinfo, "xmlParseFile failed. File: %s", fname.c_str());
 831             BackendPtr b;
 832             return b;
 833         }
 834         xsp = xsltParseStylesheetDoc(xsp_doc);
 835         if (!xsp)
 836         {
 837             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 838             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 839             BackendPtr b;
 840             xmlFreeDoc(xsp_doc);
 841             return b;
 842         }
 843     }
 844
 845     m_backend.reset();
 846
 847     BackendPtr b(new Backend(sptr));
 848
 849     b->xsp = xsp;
 850     b->m_frontend_database = database;
 851
 852     if (sptr->query_encoding.length())
 853         b->set_option("rpnCharset", sptr->query_encoding);
 854
 855     b->set_option("timeout", "40");
 856
 857     if (m_p->apdu_log)
 858         b->set_option("apdulog", "1");
 859
 860     if (sptr->piggyback)
 861         b->set_option("count", "1"); /* some SRU servers INSIST on getting
 862                                         maximumRecords > 0 */
 863     b->set_option("piggyback", sptr->piggyback ? "1" : "0");
 864
 865     if (authentication.length() == 0)
 866         authentication = sptr->authentication;
 867
 868     if (proxy.length() == 0)
 869         proxy = sptr->cfProxy;
 870
 871     if (sptr->cfAuth.length())
 872     {
 873         // A CF target
 874         b->set_option("user", sptr->cfAuth);
 875         if (authentication.length())
 876         {
 877             size_t found = authentication.find('/');
 878             if (found != std::string::npos)
 879             {
 880                 out_names[no_out_args] = "user";
 881                 out_values[no_out_args++] =
 882                     odr_strdup(odr, authentication.substr(0, found).c_str());
 883
 884                 out_names[no_out_args] = "password";
 885                 out_values[no_out_args++] =
 886                     odr_strdup(odr, authentication.substr(found+1).c_str());
 887             }
 888             else
 889             {
 890                 out_names[no_out_args] = "user";
 891                 out_values[no_out_args++] =
 892                     odr_strdup(odr, authentication.c_str());
 893             }
 894         }
 895         if (proxy.length())
 896         {
 897             out_names[no_out_args] = "proxy";
 898             out_values[no_out_args++] = odr_strdup(odr, proxy.c_str());
 899         }
 900         if (sptr->cfSubDB.length())
 901         {
 902             out_names[no_out_args] = "subdatabase";
 903             out_values[no_out_args++] = odr_strdup(odr, sptr->cfSubDB.c_str());
 904         }
 905     }
 906     else
 907     {
 908         size_t found = authentication.find('/');
 909
 910         if (sptr->sru.length() && found != std::string::npos)
 911         {
 912             b->set_option("user", authentication.substr(0, found));
 913             b->set_option("password", authentication.substr(found+1));
 914         }
 915         else
 916             b->set_option("user", authentication);
 917
 918         if (proxy.length())
 919             b->set_option("proxy", proxy);
 920     }
 921     if (b->sptr->contentConnector.length())
 922     {
 923         char *fname = (char *) xmalloc(m_p->content_tmp_file.length() + 8);
 924         strcpy(fname, m_p->content_tmp_file.c_str());
 925         char *xx = strstr(fname, "XXXXXX");
 926         if (!xx)
 927         {
 928             xx = fname + strlen(fname);
 929             strcat(fname, "XXXXXX");
 930         }
 931         char tmp_char = xx[6];
 932         sprintf(xx, "%06d", ((unsigned) rand()) % 1000000);
 933         xx[6] = tmp_char;
 934
 935         FILE *file = fopen(fname, "w");
 936         if (!file)
 937         {
 938             package.log("zoom", YLOG_WARN|YLOG_ERRNO, "create %s", fname);
 939             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 940             *addinfo = (char *)  odr_malloc(odr, 40 + strlen(fname));
 941             sprintf(*addinfo, "Could not create %s", fname);
 942             xfree(fname);
 943             BackendPtr backend_null;
 944             return backend_null;
 945         }
 946         b->content_session_id.assign(xx, 6);
 947         WRBUF w = wrbuf_alloc();
 948         wrbuf_puts(w, "#content_proxy\n");
 949         wrbuf_printf(w, "connector: %s\n", b->sptr->contentConnector.c_str());
 950         if (authentication.length())
 951             wrbuf_printf(w, "auth: %s\n", authentication.c_str());
 952         if (proxy.length())
 953             wrbuf_printf(w, "proxy: %s\n", proxy.c_str());
 954         if (sptr->cfProxy.length())
 955             wrbuf_printf(w, "cfproxy: %s\n", sptr->cfProxy.c_str());
 956
 957         fwrite(wrbuf_buf(w), 1, wrbuf_len(w), file);
 958         fclose(file);
 959         package.log("zoom", YLOG_LOG, "file %s created", fname);
 960         xfree(fname);
 961     }
 962
 963     std::string url;
 964     if (sptr->sru.length())
 965     {
 966         url = "http://" + sptr->target;
 967         b->set_option("sru", sptr->sru);
 968
 969         if (sptr->sru_version.length())
 970             b->set_option("sru_version", sptr->sru_version);
 971     }
 972     else
 973     {
 974         url = sptr->target;
 975     }
 976     if (no_out_args)
 977     {
 978         char *x_args = 0;
 979         out_names[no_out_args] = 0; // terminate list
 980
 981         yaz_array_to_uri(&x_args, odr, (char **) out_names,
 982                          (char **) out_values);
 983         url += "," + std::string(x_args);
 984     }
 985     package.log("zoom", YLOG_LOG, "url: %s", url.c_str());
 986     b->connect(url, error, addinfo, odr);
 987     if (*error == 0)
 988     {
 989         m_backend = b;
 990     }
 991     return b;
 992 }
 993
 994 void yf::Zoom::Frontend::prepare_elements(BackendPtr b,
 995                                           Odr_oid *preferredRecordSyntax,
 996                                           const char *element_set_name,
 997                                           bool &enable_pz2_retrieval,
 998                                           bool &enable_pz2_transform,
 999                                           bool &assume_marc8_charset)
1000
1001 {
1002     char oid_name_str[OID_STR_MAX];
1003     const char *syntax_name = 0;
1004
1005     if (preferredRecordSyntax &&
1006         !oid_oidcmp(preferredRecordSyntax, yaz_oid_recsyn_xml)
1007         && element_set_name)
1008     {
1009         if (!strcmp(element_set_name, m_p->element_transform.c_str()))
1010         {
1011             enable_pz2_retrieval = true;
1012             enable_pz2_transform = true;
1013         }
1014         else if (!strcmp(element_set_name, m_p->element_raw.c_str()))
1015         {
1016             enable_pz2_retrieval = true;
1017         }
1018     }
1019
1020     if (enable_pz2_retrieval)
1021     {
1022         std::string configured_request_syntax = b->sptr->request_syntax;
1023         if (configured_request_syntax.length())
1024         {
1025             syntax_name = configured_request_syntax.c_str();
1026             const Odr_oid *syntax_oid =
1027                 yaz_string_to_oid(yaz_oid_std(), CLASS_RECSYN, syntax_name);
1028             if (!oid_oidcmp(syntax_oid, yaz_oid_recsyn_usmarc)
1029                 || !oid_oidcmp(syntax_oid, yaz_oid_recsyn_opac))
1030                 assume_marc8_charset = true;
1031         }
1032     }
1033     else if (preferredRecordSyntax)
1034         syntax_name =
1035             yaz_oid_to_string_buf(preferredRecordSyntax, 0, oid_name_str);
1036
1037     if (b->sptr->sru.length())
1038         syntax_name = "XML";
1039
1040     b->set_option("preferredRecordSyntax", syntax_name);
1041
1042     if (enable_pz2_retrieval)
1043     {
1044         element_set_name = 0;
1045         if (b->sptr->element_set.length())
1046             element_set_name = b->sptr->element_set.c_str();
1047     }
1048
1049     b->set_option("elementSetName", element_set_name);
1050     if (b->sptr->sru.length() && element_set_name)
1051         b->set_option("schema", element_set_name);
1052 }
1053
1054 Z_Records *yf::Zoom::Frontend::get_records(Odr_int start,
1055                                            Odr_int number_to_present,
1056                                            int *error,
1057                                            char **addinfo,
1058                                            Odr_int *number_of_records_returned,
1059                                            ODR odr,
1060                                            BackendPtr b,
1061                                            Odr_oid *preferredRecordSyntax,
1062                                            const char *element_set_name)
1063 {
1064     *number_of_records_returned = 0;
1065     Z_Records *records = 0;
1066     bool enable_pz2_retrieval = false; // whether target profile is used
1067     bool enable_pz2_transform = false; // whether XSLT is used as well
1068     bool assume_marc8_charset = false;
1069
1070     prepare_elements(b, preferredRecordSyntax,
1071                      element_set_name,
1072                      enable_pz2_retrieval,
1073                      enable_pz2_transform,
1074                      assume_marc8_charset);
1075
1076     if (start < 0 || number_to_present <=0)
1077         return records;
1078
1079     if (number_to_present > 10000)
1080         number_to_present = 10000;
1081
1082     ZOOM_record *recs = (ZOOM_record *)
1083         odr_malloc(odr, (size_t) number_to_present * sizeof(*recs));
1084
1085     b->present(start, number_to_present, recs, error, addinfo, odr);
1086
1087     int i = 0;
1088     if (!*error)
1089     {
1090         for (i = 0; i < number_to_present; i++)
1091             if (!recs[i])
1092                 break;
1093     }
1094     if (i > 0)
1095     {  // only return records if no error and at least one record
1096         char *odr_database = odr_strdup(odr,
1097                                         b->m_frontend_database.c_str());
1098         Z_NamePlusRecordList *npl = (Z_NamePlusRecordList *)
1099             odr_malloc(odr, sizeof(*npl));
1100         *number_of_records_returned = i;
1101         npl->num_records = i;
1102         npl->records = (Z_NamePlusRecord **)
1103             odr_malloc(odr, i * sizeof(*npl->records));
1104         for (i = 0; i < number_to_present; i++)
1105         {
1106             Z_NamePlusRecord *npr = 0;
1107             const char *addinfo;
1108             int sur_error = ZOOM_record_error(recs[i], 0 /* msg */,
1109                                               &addinfo, 0 /* diagset */);
1110
1111             if (sur_error)
1112             {
1113                 npr = zget_surrogateDiagRec(odr, odr_database, sur_error,
1114                                             addinfo);
1115             }
1116             else if (enable_pz2_retrieval)
1117             {
1118                 char rec_type_str[100];
1119                 const char *record_encoding = 0;
1120
1121                 if (b->sptr->record_encoding.length())
1122                     record_encoding = b->sptr->record_encoding.c_str();
1123                 else if (assume_marc8_charset)
1124                     record_encoding = "marc8";
1125
1126                 strcpy(rec_type_str, b->sptr->use_turbomarc ? "txml" : "xml");
1127                 if (record_encoding)
1128                 {
1129                     strcat(rec_type_str, "; charset=");
1130                     strcat(rec_type_str, record_encoding);
1131                 }
1132
1133                 int rec_len;
1134                 xmlChar *xmlrec_buf = 0;
1135                 const char *rec_buf = ZOOM_record_get(recs[i], rec_type_str,
1136                                                       &rec_len);
1137                 if (!rec_buf && !npr)
1138                 {
1139                     std::string addinfo("ZOOM_record_get failed for type ");
1140
1141                     addinfo += rec_type_str;
1142                     npr = zget_surrogateDiagRec(
1143                         odr, odr_database,
1144                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1145                         addinfo.c_str());
1146                 }
1147
1148                 if (rec_buf && b->xsp && enable_pz2_transform)
1149                 {
1150                     xmlDoc *rec_doc = xmlParseMemory(rec_buf, rec_len);
1151                     if (!rec_doc)
1152                     {
1153                         npr = zget_surrogateDiagRec(
1154                             odr, odr_database,
1155                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1156                             "xml parse failed for record");
1157                     }
1158                     else
1159                     {
1160                         xmlDoc *rec_res =
1161                             xsltApplyStylesheet(b->xsp, rec_doc, 0);
1162
1163                         if (rec_res)
1164                         {
1165                             xsltSaveResultToString(&xmlrec_buf, &rec_len,
1166                                                    rec_res, b->xsp);
1167                             rec_buf = (const char *) xmlrec_buf;
1168
1169                             xmlFreeDoc(rec_res);
1170                         }
1171                         if (!rec_buf)
1172                         {
1173                             std::string addinfo;
1174
1175                             addinfo = "xslt apply failed for "
1176                                 + b->sptr->transform_xsl_fname;
1177                             npr = zget_surrogateDiagRec(
1178                                 odr, odr_database,
1179                                 YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1180                                 addinfo.c_str());
1181                         }
1182                         xmlFreeDoc(rec_doc);
1183                     }
1184                 }
1185
1186                 if (rec_buf)
1187                 {
1188                     xmlDoc *doc = xmlParseMemory(rec_buf, rec_len);
1189                     std::string res =
1190                         mp::xml::url_recipe_handle(doc, b->sptr->urlRecipe);
1191                     if (res.length() && b->content_session_id.length())
1192                     {
1193                         size_t off = res.find_first_of("://");
1194                         if (off != std::string::npos)
1195                         {
1196                             char tmp[1024];
1197                             sprintf(tmp, "%s.%s/",
1198                                     b->content_session_id.c_str(),
1199                                     m_p->content_proxy_server.c_str());
1200                             res.insert(off + 3, tmp);
1201                         }
1202                     }
1203                     if (res.length())
1204                     {
1205                         xmlNode *ptr = xmlDocGetRootElement(doc);
1206                         while (ptr && ptr->type != XML_ELEMENT_NODE)
1207                             ptr = ptr->next;
1208                         xmlNode *c =
1209                             xmlNewChild(ptr, 0, BAD_CAST "metadata", 0);
1210                         xmlNewProp(c, BAD_CAST "type", BAD_CAST
1211                                    "generated-url");
1212                         xmlNode * t = xmlNewText(BAD_CAST res.c_str());
1213                         xmlAddChild(c, t);
1214
1215                         if (xmlrec_buf)
1216                             xmlFree(xmlrec_buf);
1217
1218                         xmlDocDumpMemory(doc, &xmlrec_buf, &rec_len);
1219                         rec_buf = (const char *) xmlrec_buf;
1220                     }
1221                     xmlFreeDoc(doc);
1222                 }
1223                 if (!npr)
1224                 {
1225                     if (!rec_buf)
1226                         npr = zget_surrogateDiagRec(
1227                             odr, odr_database,
1228                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1229                             rec_type_str);
1230                     else
1231                     {
1232                         npr = (Z_NamePlusRecord *)
1233                             odr_malloc(odr, sizeof(*npr));
1234                         npr->databaseName = odr_database;
1235                         npr->which = Z_NamePlusRecord_databaseRecord;
1236                         npr->u.databaseRecord =
1237                             z_ext_record_xml(odr, rec_buf, rec_len);
1238                     }
1239                 }
1240                 if (xmlrec_buf)
1241                     xmlFree(xmlrec_buf);
1242             }
1243             else
1244             {
1245                 Z_External *ext =
1246                     (Z_External *) ZOOM_record_get(recs[i], "ext", 0);
1247                 if (ext)
1248                 {
1249                     npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
1250                     npr->databaseName = odr_database;
1251                     npr->which = Z_NamePlusRecord_databaseRecord;
1252                     npr->u.databaseRecord = ext;
1253                 }
1254                 else
1255                 {
1256                     npr = zget_surrogateDiagRec(
1257                         odr, odr_database,
1258                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1259                         "ZOOM_record, type ext");
1260                 }
1261             }
1262             npl->records[i] = npr;
1263         }
1264         records = (Z_Records*) odr_malloc(odr, sizeof(*records));
1265         records->which = Z_Records_DBOSD;
1266         records->u.databaseOrSurDiagnostics = npl;
1267     }
1268     return records;
1269 }
1270
1271 struct cql_node *yf::Zoom::Impl::convert_cql_fields(struct cql_node *cn,
1272                                                     ODR odr)
1273 {
1274     struct cql_node *r = 0;
1275     if (!cn)
1276         return 0;
1277     switch (cn->which)
1278     {
1279     case CQL_NODE_ST:
1280         if (cn->u.st.index)
1281         {
1282             std::map<std::string,std::string>::const_iterator it;
1283             it = fieldmap.find(cn->u.st.index);
1284             if (it == fieldmap.end())
1285                 return cn;
1286             if (it->second.length())
1287                 cn->u.st.index = odr_strdup(odr, it->second.c_str());
1288             else
1289                 cn->u.st.index = 0;
1290         }
1291         break;
1292     case CQL_NODE_BOOL:
1293         r = convert_cql_fields(cn->u.boolean.left, odr);
1294         if (!r)
1295             r = convert_cql_fields(cn->u.boolean.right, odr);
1296         break;
1297     case CQL_NODE_SORT:
1298         r = convert_cql_fields(cn->u.sort.search, odr);
1299         break;
1300     }
1301     return r;
1302 }
1303
1304 void yf::Zoom::Frontend::handle_search(mp::Package &package)
1305 {
1306     Z_GDU *gdu = package.request().get();
1307     Z_APDU *apdu_req = gdu->u.z3950;
1308     Z_APDU *apdu_res = 0;
1309     mp::odr odr;
1310     Z_SearchRequest *sr = apdu_req->u.searchRequest;
1311     if (sr->num_databaseNames != 1)
1312     {
1313         apdu_res = odr.create_searchResponse(
1314             apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
1315         package.response() = apdu_res;
1316         return;
1317     }
1318
1319     int error = 0;
1320     char *addinfo = 0;
1321     std::string db(sr->databaseNames[0]);
1322     BackendPtr b = get_backend_from_databases(package, db, &error,
1323                                               &addinfo, odr);
1324     if (error)
1325     {
1326         apdu_res =
1327             odr.create_searchResponse(apdu_req, error, addinfo);
1328         package.response() = apdu_res;
1329         return;
1330     }
1331
1332     b->set_option("setname", "default");
1333
1334     bool enable_pz2_retrieval = false;
1335     bool enable_pz2_transform = false;
1336     bool assume_marc8_charset = false;
1337     prepare_elements(b, sr->preferredRecordSyntax, 0 /*element_set_name */,
1338                      enable_pz2_retrieval,
1339                      enable_pz2_transform,
1340                      assume_marc8_charset);
1341
1342     Odr_int hits = 0;
1343     Z_Query *query = sr->query;
1344     WRBUF ccl_wrbuf = 0;
1345     WRBUF pqf_wrbuf = 0;
1346     std::string sortkeys;
1347
1348     if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
1349     {
1350         // RPN
1351         pqf_wrbuf = wrbuf_alloc();
1352         yaz_rpnquery_to_wrbuf(pqf_wrbuf, query->u.type_1);
1353     }
1354     else if (query->which == Z_Query_type_2)
1355     {
1356         // CCL
1357         ccl_wrbuf = wrbuf_alloc();
1358         wrbuf_write(ccl_wrbuf, (const char *) query->u.type_2->buf,
1359                     query->u.type_2->len);
1360     }
1361     else if (query->which == Z_Query_type_104 &&
1362              query->u.type_104->which == Z_External_CQL)
1363     {
1364         // CQL
1365         const char *cql = query->u.type_104->u.cql;
1366         CQL_parser cp = cql_parser_create();
1367         int r = cql_parser_string(cp, cql);
1368         package.log("zoom", YLOG_LOG, "CQL: %s", cql);
1369         if (r)
1370         {
1371             cql_parser_destroy(cp);
1372             package.log("zoom", YLOG_WARN, "CQL syntax error");
1373             apdu_res =
1374                 odr.create_searchResponse(apdu_req,
1375                                           YAZ_BIB1_MALFORMED_QUERY,
1376                                           "CQL syntax error");
1377             package.response() = apdu_res;
1378             return;
1379         }
1380         struct cql_node *cn = cql_parser_result(cp);
1381         struct cql_node *cn_error = m_p->convert_cql_fields(cn, odr);
1382         if (cn_error)
1383         {
1384             // hopefully we are getting a ptr to a index+relation+term node
1385             addinfo = 0;
1386             if (cn_error->which == CQL_NODE_ST)
1387                 addinfo = cn_error->u.st.index;
1388
1389             apdu_res =
1390                 odr.create_searchResponse(apdu_req,
1391                                           YAZ_BIB1_UNSUPP_USE_ATTRIBUTE,
1392                                           addinfo);
1393             package.response() = apdu_res;
1394             return;
1395         }
1396         char ccl_buf[1024];
1397
1398         r = cql_to_ccl_buf(cn, ccl_buf, sizeof(ccl_buf));
1399         if (r == 0)
1400         {
1401             ccl_wrbuf = wrbuf_alloc();
1402             wrbuf_puts(ccl_wrbuf, ccl_buf);
1403
1404             WRBUF sru_sortkeys_wrbuf = wrbuf_alloc();
1405
1406             cql_sortby_to_sortkeys(cn, wrbuf_vp_puts, sru_sortkeys_wrbuf);
1407             WRBUF sort_spec_wrbuf = wrbuf_alloc();
1408             yaz_srw_sortkeys_to_sort_spec(wrbuf_cstr(sru_sortkeys_wrbuf),
1409                                           sort_spec_wrbuf);
1410             wrbuf_destroy(sru_sortkeys_wrbuf);
1411
1412             yaz_tok_cfg_t tc = yaz_tok_cfg_create();
1413             yaz_tok_parse_t tp =
1414                 yaz_tok_parse_buf(tc, wrbuf_cstr(sort_spec_wrbuf));
1415             yaz_tok_cfg_destroy(tc);
1416
1417             /* go through sortspec and map fields */
1418             int token = yaz_tok_move(tp);
1419             while (token != YAZ_TOK_EOF)
1420             {
1421                 if (token == YAZ_TOK_STRING)
1422                 {
1423                     const char *field = yaz_tok_parse_string(tp);
1424                     std::map<std::string,std::string>::iterator it;
1425                     it = b->sptr->sortmap.find(field);
1426                     if (it != b->sptr->sortmap.end())
1427                         sortkeys += it->second;
1428                     else
1429                         sortkeys += field;
1430                 }
1431                 sortkeys += " ";
1432                 token = yaz_tok_move(tp);
1433                 if (token == YAZ_TOK_STRING)
1434                 {
1435                     sortkeys += yaz_tok_parse_string(tp);
1436                 }
1437                 if (token != YAZ_TOK_EOF)
1438                 {
1439                     sortkeys += " ";
1440                     token = yaz_tok_move(tp);
1441                 }
1442             }
1443             yaz_tok_parse_destroy(tp);
1444             wrbuf_destroy(sort_spec_wrbuf);
1445         }
1446         cql_parser_destroy(cp);
1447         if (r)
1448         {
1449             apdu_res =
1450                 odr.create_searchResponse(apdu_req,
1451                                           YAZ_BIB1_MALFORMED_QUERY,
1452                                           "CQL to CCL conversion error");
1453             package.response() = apdu_res;
1454             return;
1455         }
1456     }
1457     else
1458     {
1459         apdu_res =
1460             odr.create_searchResponse(apdu_req, YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
1461         package.response() = apdu_res;
1462         return;
1463     }
1464
1465     if (ccl_wrbuf)
1466     {
1467         // CCL to PQF
1468         assert(pqf_wrbuf == 0);
1469         int cerror, cpos;
1470         struct ccl_rpn_node *cn;
1471         package.log("zoom", YLOG_LOG, "CCL: %s", wrbuf_cstr(ccl_wrbuf));
1472         cn = ccl_find_str(b->sptr->ccl_bibset, wrbuf_cstr(ccl_wrbuf),
1473                           &cerror, &cpos);
1474         wrbuf_destroy(ccl_wrbuf);
1475         if (!cn)
1476         {
1477             char *addinfo = odr_strdup(odr, ccl_err_msg(cerror));
1478             int z3950_diag = YAZ_BIB1_MALFORMED_QUERY;
1479
1480             switch (cerror)
1481             {
1482             case CCL_ERR_UNKNOWN_QUAL:
1483                 z3950_diag = YAZ_BIB1_UNSUPP_USE_ATTRIBUTE;
1484                 break;
1485             case CCL_ERR_TRUNC_NOT_LEFT:
1486             case CCL_ERR_TRUNC_NOT_RIGHT:
1487             case CCL_ERR_TRUNC_NOT_BOTH:
1488                 z3950_diag = YAZ_BIB1_UNSUPP_TRUNCATION_ATTRIBUTE;
1489                 break;
1490             }
1491             apdu_res =
1492                 odr.create_searchResponse(apdu_req, z3950_diag, addinfo);
1493             package.response() = apdu_res;
1494             return;
1495         }
1496         pqf_wrbuf = wrbuf_alloc();
1497         ccl_pquery(pqf_wrbuf, cn);
1498         package.log("zoom", YLOG_LOG, "RPN: %s", wrbuf_cstr(pqf_wrbuf));
1499         ccl_rpn_delete(cn);
1500     }
1501
1502     assert(pqf_wrbuf);
1503
1504     ZOOM_query q = ZOOM_query_create();
1505     ZOOM_query_sortby2(q, b->sptr->sortStrategy.c_str(), sortkeys.c_str());
1506
1507     if (b->get_option("sru"))
1508     {
1509         int status = 0;
1510         Z_RPNQuery *zquery;
1511         zquery = p_query_rpn(odr, wrbuf_cstr(pqf_wrbuf));
1512         WRBUF wrb = wrbuf_alloc();
1513
1514         if (!strcmp(b->get_option("sru"), "solr"))
1515         {
1516             solr_transform_t cqlt = solr_transform_create();
1517
1518             status = solr_transform_rpn2solr_wrbuf(cqlt, wrb, zquery);
1519
1520             solr_transform_close(cqlt);
1521         }
1522         else
1523         {
1524             cql_transform_t cqlt = cql_transform_create();
1525
1526             status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery);
1527
1528             cql_transform_close(cqlt);
1529         }
1530         if (status == 0)
1531         {
1532             ZOOM_query_cql(q, wrbuf_cstr(wrb));
1533             package.log("zoom", YLOG_LOG, "CQL: %s", wrbuf_cstr(wrb));
1534             b->search(q, &hits, &error, &addinfo, odr);
1535         }
1536         ZOOM_query_destroy(q);
1537
1538         wrbuf_destroy(wrb);
1539         wrbuf_destroy(pqf_wrbuf);
1540         if (status)
1541         {
1542             apdu_res =
1543                 odr.create_searchResponse(apdu_req, YAZ_BIB1_MALFORMED_QUERY,
1544                                           "can not convert from RPN to CQL/SOLR");
1545             package.response() = apdu_res;
1546             return;
1547         }
1548     }
1549     else
1550     {
1551         ZOOM_query_prefix(q, wrbuf_cstr(pqf_wrbuf));
1552         package.log("zoom", YLOG_LOG, "search PQF: %s", wrbuf_cstr(pqf_wrbuf));
1553         b->search(q, &hits, &error, &addinfo, odr);
1554         ZOOM_query_destroy(q);
1555         wrbuf_destroy(pqf_wrbuf);
1556     }
1557
1558     const char *element_set_name = 0;
1559     Odr_int number_to_present = 0;
1560     if (!error)
1561         mp::util::piggyback_sr(sr, hits, number_to_present, &element_set_name);
1562
1563     Odr_int number_of_records_returned = 0;
1564     Z_Records *records = get_records(
1565         0, number_to_present, &error, &addinfo,
1566         &number_of_records_returned, odr, b, sr->preferredRecordSyntax,
1567         element_set_name);
1568     apdu_res = odr.create_searchResponse(apdu_req, error, addinfo);
1569     if (records)
1570     {
1571         apdu_res->u.searchResponse->records = records;
1572         apdu_res->u.searchResponse->numberOfRecordsReturned =
1573             odr_intdup(odr, number_of_records_returned);
1574     }
1575     apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
1576     package.response() = apdu_res;
1577 }
1578
1579 void yf::Zoom::Frontend::handle_present(mp::Package &package)
1580 {
1581     Z_GDU *gdu = package.request().get();
1582     Z_APDU *apdu_req = gdu->u.z3950;
1583     Z_APDU *apdu_res = 0;
1584     Z_PresentRequest *pr = apdu_req->u.presentRequest;
1585
1586     mp::odr odr;
1587     if (!m_backend)
1588     {
1589         package.response() = odr.create_presentResponse(
1590             apdu_req, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST, 0);
1591         return;
1592     }
1593     const char *element_set_name = 0;
1594     Z_RecordComposition *comp = pr->recordComposition;
1595     if (comp && comp->which != Z_RecordComp_simple)
1596     {
1597         package.response() = odr.create_presentResponse(
1598             apdu_req,
1599             YAZ_BIB1_PRESENT_COMP_SPEC_PARAMETER_UNSUPP, 0);
1600         return;
1601     }
1602     if (comp && comp->u.simple->which == Z_ElementSetNames_generic)
1603         element_set_name = comp->u.simple->u.generic;
1604     Odr_int number_of_records_returned = 0;
1605     int error = 0;
1606     char *addinfo = 0;
1607     Z_Records *records = get_records(
1608         *pr->resultSetStartPoint - 1, *pr->numberOfRecordsRequested,
1609         &error, &addinfo, &number_of_records_returned, odr, m_backend,
1610         pr->preferredRecordSyntax, element_set_name);
1611
1612     apdu_res = odr.create_presentResponse(apdu_req, error, addinfo);
1613     if (records)
1614     {
1615         apdu_res->u.presentResponse->records = records;
1616         apdu_res->u.presentResponse->numberOfRecordsReturned =
1617             odr_intdup(odr, number_of_records_returned);
1618     }
1619     package.response() = apdu_res;
1620 }
1621
1622 void yf::Zoom::Frontend::handle_package(mp::Package &package)
1623 {
1624     Z_GDU *gdu = package.request().get();
1625     if (!gdu)
1626         ;
1627     else if (gdu->which == Z_GDU_Z3950)
1628     {
1629         Z_APDU *apdu_req = gdu->u.z3950;
1630         if (apdu_req->which == Z_APDU_initRequest)
1631         {
1632             mp::odr odr;
1633             package.response() = odr.create_close(
1634                 apdu_req,
1635                 Z_Close_protocolError,
1636                 "double init");
1637         }
1638         else if (apdu_req->which == Z_APDU_searchRequest)
1639         {
1640             handle_search(package);
1641         }
1642         else if (apdu_req->which == Z_APDU_presentRequest)
1643         {
1644             handle_present(package);
1645         }
1646         else
1647         {
1648             mp::odr odr;
1649             package.response() = odr.create_close(
1650                 apdu_req,
1651                 Z_Close_protocolError,
1652                 "zoom filter cannot handle this APDU");
1653             package.session().close();
1654         }
1655     }
1656     else
1657     {
1658         package.session().close();
1659     }
1660 }
1661
1662 void yf::Zoom::Impl::process(mp::Package &package)
1663 {
1664     FrontendPtr f = get_frontend(package);
1665     Z_GDU *gdu = package.request().get();
1666
1667     if (f->m_is_virtual)
1668     {
1669         f->handle_package(package);
1670     }
1671     else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1672              Z_APDU_initRequest)
1673     {
1674         Z_InitRequest *req = gdu->u.z3950->u.initRequest;
1675         f->m_init_gdu = gdu;
1676
1677         mp::odr odr;
1678         Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
1679         Z_InitResponse *resp = apdu->u.initResponse;
1680
1681         int i;
1682         static const int masks[] = {
1683             Z_Options_search,
1684             Z_Options_present,
1685             -1
1686         };
1687         for (i = 0; masks[i] != -1; i++)
1688             if (ODR_MASK_GET(req->options, masks[i]))
1689                 ODR_MASK_SET(resp->options, masks[i]);
1690
1691         static const int versions[] = {
1692             Z_ProtocolVersion_1,
1693             Z_ProtocolVersion_2,
1694             Z_ProtocolVersion_3,
1695             -1
1696         };
1697         for (i = 0; versions[i] != -1; i++)
1698             if (ODR_MASK_GET(req->protocolVersion, versions[i]))
1699                 ODR_MASK_SET(resp->protocolVersion, versions[i]);
1700             else
1701                 break;
1702
1703         *resp->preferredMessageSize = *req->preferredMessageSize;
1704         *resp->maximumRecordSize = *req->maximumRecordSize;
1705
1706         package.response() = apdu;
1707         f->m_is_virtual = true;
1708     }
1709     else
1710         package.move();
1711
1712     release_frontend(package);
1713 }
1714
1715
1716 static mp::filter::Base* filter_creator()
1717 {
1718     return new mp::filter::Zoom;
1719 }
1720
1721 extern "C" {
1722     struct metaproxy_1_filter_struct metaproxy_1_filter_zoom = {
1723         0,
1724         "zoom",
1725         filter_creator
1726     };
1727 }
1728
1729
1730 /*
1731  * Local variables:
1732  * c-basic-offset: 4
1733  * c-file-style: "Stroustrup"
1734  * indent-tabs-mode: nil
1735  * End:
1736  * vim: shiftwidth=4 tabstop=8 expandtab
1737  */
1738