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 request_syntax;
  68             std::string element_set;
  69             std::string record_encoding;
  70             std::string transform_xsl_fname;
  71             std::string transform_xsl_content;
  72             std::string urlRecipe;
  73             std::string contentConnector;
  74             std::string sortStrategy;
  75             bool use_turbomarc;
  76             bool piggyback;
  77             CCL_bibset ccl_bibset;
  78             std::map<std::string, std::string> sortmap;
  79             Searchable(CCL_bibset base);
  80             ~Searchable();
  81         };
  82         class Zoom::Backend : boost::noncopyable {
  83             friend class Impl;
  84             friend class Frontend;
  85             std::string zurl;
  86             ZOOM_connection m_connection;
  87             ZOOM_resultset m_resultset;
  88             std::string m_frontend_database;
  89             SearchablePtr sptr;
  90             xsltStylesheetPtr xsp;
  91             std::string content_session_id;
  92         public:
  93             Backend(SearchablePtr sptr);
  94             ~Backend();
  95             void connect(std::string zurl, int *error, char **addinfo,
  96                          ODR odr);
  97             void search(ZOOM_query q, Odr_int *hits,
  98                         int *error, char **addinfo, ODR odr);
  99             void present(Odr_int start, Odr_int number, ZOOM_record *recs,
 100                          int *error, char **addinfo, ODR odr);
 101             void set_option(const char *name, const char *value);
 102             void set_option(const char *name, std::string value);
 103             const char *get_option(const char *name);
 104             void get_zoom_error(int *error, char **addinfo, ODR odr);
 105         };
 106         class Zoom::Frontend : boost::noncopyable {
 107             friend class Impl;
 108             Impl *m_p;
 109             bool m_is_virtual;
 110             bool m_in_use;
 111             yazpp_1::GDU m_init_gdu;
 112             BackendPtr m_backend;
 113             void handle_package(mp::Package &package);
 114             void handle_search(mp::Package &package);
 115             void handle_present(mp::Package &package);
 116             BackendPtr get_backend_from_databases(const mp::Package &package,
 117                                                   std::string &database,
 118                                                   int *error,
 119                                                   char **addinfo,
 120                                                   ODR odr);
 121
 122
 123             void prepare_elements(BackendPtr b,
 124                                   Odr_oid *preferredRecordSyntax,
 125                                   const char *element_set_name,
 126                                   bool &enable_pz2_retrieval,
 127                                   bool &enable_pz2_transform,
 128                                   bool &assume_marc8_charset);
 129
 130             Z_Records *get_records(Odr_int start,
 131                                    Odr_int number_to_present,
 132                                    int *error,
 133                                    char **addinfo,
 134                                    Odr_int *number_of_records_returned,
 135                                    ODR odr, BackendPtr b,
 136                                    Odr_oid *preferredRecordSyntax,
 137                                    const char *element_set_name);
 138         public:
 139             Frontend(Impl *impl);
 140             ~Frontend();
 141         };
 142         class Zoom::Impl {
 143             friend class Frontend;
 144         public:
 145             Impl();
 146             ~Impl();
 147             void process(metaproxy_1::Package & package);
 148             void configure(const xmlNode * ptr, bool test_only,
 149                            const char *path);
 150         private:
 151             void configure_local_records(const xmlNode * ptr, bool test_only);
 152             FrontendPtr get_frontend(mp::Package &package);
 153             void release_frontend(mp::Package &package);
 154             SearchablePtr parse_torus_record(const xmlNode *ptr);
 155             struct cql_node *convert_cql_fields(struct cql_node *cn, ODR odr);
 156             std::map<mp::Session, FrontendPtr> m_clients;
 157             boost::mutex m_mutex;
 158             boost::condition m_cond_session_ready;
 159             std::string torus_url;
 160             std::string default_realm;
 161             std::map<std::string,std::string> fieldmap;
 162             std::string xsldir;
 163             std::string file_path;
 164             std::string content_proxy_server;
 165             std::string content_tmp_file;
 166             bool apdu_log;
 167             CCL_bibset bibset;
 168             std::string element_transform;
 169             std::string element_raw;
 170             std::string proxy;
 171             std::map<std::string,SearchablePtr> s_map;
 172         };
 173     }
 174 }
 175
 176 // define Pimpl wrapper forwarding to Impl
 177
 178 yf::Zoom::Zoom() : m_p(new Impl)
 179 {
 180 }
 181
 182 yf::Zoom::~Zoom()
 183 {  // must have a destructor because of boost::scoped_ptr
 184 }
 185
 186 void yf::Zoom::configure(const xmlNode *xmlnode, bool test_only,
 187                          const char *path)
 188 {
 189     m_p->configure(xmlnode, test_only, path);
 190 }
 191
 192 void yf::Zoom::process(mp::Package &package) const
 193 {
 194     m_p->process(package);
 195 }
 196
 197
 198 // define Implementation stuff
 199
 200 yf::Zoom::Backend::Backend(SearchablePtr ptr) : sptr(ptr)
 201 {
 202     m_connection = ZOOM_connection_create(0);
 203     m_resultset = 0;
 204     xsp = 0;
 205 }
 206
 207 yf::Zoom::Backend::~Backend()
 208 {
 209     if (xsp)
 210         xsltFreeStylesheet(xsp);
 211     ZOOM_connection_destroy(m_connection);
 212     ZOOM_resultset_destroy(m_resultset);
 213 }
 214
 215
 216 void yf::Zoom::Backend::get_zoom_error(int *error, char **addinfo,
 217                                        ODR odr)
 218 {
 219     const char *msg = 0;
 220     const char *zoom_addinfo = 0;
 221     const char *dset = 0;
 222     *error = ZOOM_connection_error_x(m_connection, &msg, &zoom_addinfo, &dset);
 223     if (*error)
 224     {
 225         if (*error >= ZOOM_ERROR_CONNECT)
 226         {
 227             // turn ZOOM diagnostic into a Bib-1 2: with addinfo=zoom err msg
 228             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 229             *addinfo = (char *) odr_malloc(
 230                 odr, 20 + strlen(msg) +
 231                 (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 232             strcpy(*addinfo, msg);
 233             if (zoom_addinfo)
 234             {
 235                 strcat(*addinfo, ": ");
 236                 strcat(*addinfo, zoom_addinfo);
 237                 strcat(*addinfo, " ");
 238             }
 239         }
 240         else
 241         {
 242             if (dset && !strcmp(dset, "info:srw/diagnostic/1"))
 243                 *error = yaz_diag_srw_to_bib1(*error);
 244             *addinfo = (char *) odr_malloc(
 245                 odr, 20 + (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 246             **addinfo = '\0';
 247             if (zoom_addinfo && *zoom_addinfo)
 248             {
 249                 strcpy(*addinfo, zoom_addinfo);
 250                 strcat(*addinfo, " ");
 251             }
 252             strcat(*addinfo, "(backend)");
 253         }
 254     }
 255 }
 256
 257 void yf::Zoom::Backend::connect(std::string zurl,
 258                                 int *error, char **addinfo,
 259                                 ODR odr)
 260 {
 261     ZOOM_connection_connect(m_connection, zurl.c_str(), 0);
 262     get_zoom_error(error, addinfo, odr);
 263 }
 264
 265 void yf::Zoom::Backend::search(ZOOM_query q, Odr_int *hits,
 266                                int *error, char **addinfo, ODR odr)
 267 {
 268     m_resultset = ZOOM_connection_search(m_connection, q);
 269     get_zoom_error(error, addinfo, odr);
 270     if (*error == 0)
 271         *hits = ZOOM_resultset_size(m_resultset);
 272     else
 273         *hits = 0;
 274 }
 275
 276 void yf::Zoom::Backend::present(Odr_int start, Odr_int number,
 277                                 ZOOM_record *recs,
 278                                 int *error, char **addinfo, ODR odr)
 279 {
 280     ZOOM_resultset_records(m_resultset, recs, start, number);
 281     get_zoom_error(error, addinfo, odr);
 282 }
 283
 284 void yf::Zoom::Backend::set_option(const char *name, const char *value)
 285 {
 286     ZOOM_connection_option_set(m_connection, name, value);
 287     if (m_resultset)
 288         ZOOM_resultset_option_set(m_resultset, name, value);
 289 }
 290
 291 void yf::Zoom::Backend::set_option(const char *name, std::string value)
 292 {
 293     set_option(name, value.c_str());
 294 }
 295
 296 const char *yf::Zoom::Backend::get_option(const char *name)
 297 {
 298     return ZOOM_connection_option_get(m_connection, name);
 299 }
 300
 301 yf::Zoom::Searchable::Searchable(CCL_bibset base)
 302 {
 303     piggyback = true;
 304     use_turbomarc = true;
 305     sortStrategy = "embed";
 306     ccl_bibset = ccl_qual_dup(base);
 307 }
 308
 309 yf::Zoom::Searchable::~Searchable()
 310 {
 311     ccl_qual_rm(&ccl_bibset);
 312 }
 313
 314 yf::Zoom::Frontend::Frontend(Impl *impl) :
 315     m_p(impl), m_is_virtual(false), m_in_use(true)
 316 {
 317 }
 318
 319 yf::Zoom::Frontend::~Frontend()
 320 {
 321 }
 322
 323 yf::Zoom::FrontendPtr yf::Zoom::Impl::get_frontend(mp::Package &package)
 324 {
 325     boost::mutex::scoped_lock lock(m_mutex);
 326
 327     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 328
 329     while(true)
 330     {
 331         it = m_clients.find(package.session());
 332         if (it == m_clients.end())
 333             break;
 334
 335         if (!it->second->m_in_use)
 336         {
 337             it->second->m_in_use = true;
 338             return it->second;
 339         }
 340         m_cond_session_ready.wait(lock);
 341     }
 342     FrontendPtr f(new Frontend(this));
 343     m_clients[package.session()] = f;
 344     f->m_in_use = true;
 345     return f;
 346 }
 347
 348 void yf::Zoom::Impl::release_frontend(mp::Package &package)
 349 {
 350     boost::mutex::scoped_lock lock(m_mutex);
 351     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 352
 353     it = m_clients.find(package.session());
 354     if (it != m_clients.end())
 355     {
 356         if (package.session().is_closed())
 357         {
 358             m_clients.erase(it);
 359         }
 360         else
 361         {
 362             it->second->m_in_use = false;
 363         }
 364         m_cond_session_ready.notify_all();
 365     }
 366 }
 367
 368 yf::Zoom::Impl::Impl() :
 369     apdu_log(false), element_transform("pz2") , element_raw("raw")
 370 {
 371     bibset = ccl_qual_mk();
 372
 373     srand((unsigned int) time(0));
 374 }
 375
 376 yf::Zoom::Impl::~Impl()
 377 {
 378     ccl_qual_rm(&bibset);
 379 }
 380
 381 yf::Zoom::SearchablePtr yf::Zoom::Impl::parse_torus_record(const xmlNode *ptr)
 382 {
 383     Zoom::SearchablePtr s(new Searchable(bibset));
 384
 385     for (ptr = ptr->children; ptr; ptr = ptr->next)
 386     {
 387         if (ptr->type != XML_ELEMENT_NODE)
 388             continue;
 389         if (!strcmp((const char *) ptr->name, "layer"))
 390             ptr = ptr->children;
 391         else if (!strcmp((const char *) ptr->name,
 392                          "authentication"))
 393         {
 394             s->authentication = mp::xml::get_text(ptr);
 395         }
 396         else if (!strcmp((const char *) ptr->name,
 397                          "cfAuth"))
 398         {
 399             s->cfAuth = mp::xml::get_text(ptr);
 400         }
 401         else if (!strcmp((const char *) ptr->name,
 402                          "cfProxy"))
 403         {
 404             s->cfProxy = mp::xml::get_text(ptr);
 405         }
 406         else if (!strcmp((const char *) ptr->name,
 407                          "cfSubDB"))
 408         {
 409             s->cfSubDB = mp::xml::get_text(ptr);
 410         }
 411         else if (!strcmp((const char *) ptr->name,
 412                          "contentConnector"))
 413         {
 414             s->contentConnector = mp::xml::get_text(ptr);
 415         }
 416         else if (!strcmp((const char *) ptr->name, "udb"))
 417         {
 418             s->udb = mp::xml::get_text(ptr);
 419         }
 420         else if (!strcmp((const char *) ptr->name, "zurl"))
 421         {
 422             s->target = mp::xml::get_text(ptr);
 423         }
 424         else if (!strcmp((const char *) ptr->name, "sru"))
 425         {
 426             s->sru = mp::xml::get_text(ptr);
 427         }
 428         else if (!strcmp((const char *) ptr->name,
 429                          "queryEncoding"))
 430         {
 431             s->query_encoding = mp::xml::get_text(ptr);
 432         }
 433         else if (!strcmp((const char *) ptr->name,
 434                          "piggyback"))
 435         {
 436             s->piggyback = mp::xml::get_bool(ptr, true);
 437         }
 438         else if (!strcmp((const char *) ptr->name,
 439                          "requestSyntax"))
 440         {
 441             s->request_syntax = mp::xml::get_text(ptr);
 442         }
 443         else if (!strcmp((const char *) ptr->name,
 444                          "elementSet"))
 445         {
 446             s->element_set = mp::xml::get_text(ptr);
 447         }
 448         else if (!strcmp((const char *) ptr->name,
 449                          "recordEncoding"))
 450         {
 451             s->record_encoding = mp::xml::get_text(ptr);
 452         }
 453         else if (!strcmp((const char *) ptr->name,
 454                          "transform"))
 455         {
 456             s->transform_xsl_fname = mp::xml::get_text(ptr);
 457         }
 458         else if (!strcmp((const char *) ptr->name,
 459                          "literalTransform"))
 460         {
 461             s->transform_xsl_content = mp::xml::get_text(ptr);
 462         }
 463         else if (!strcmp((const char *) ptr->name,
 464                          "urlRecipe"))
 465         {
 466             s->urlRecipe = mp::xml::get_text(ptr);
 467         }
 468         else if (!strcmp((const char *) ptr->name,
 469                          "useTurboMarc"))
 470         {
 471             ; // useTurboMarc is ignored
 472         }
 473         else if (!strncmp((const char *) ptr->name,
 474                           "cclmap_", 7))
 475         {
 476             std::string value = mp::xml::get_text(ptr);
 477             ccl_qual_fitem(s->ccl_bibset, value.c_str(),
 478                            (const char *) ptr->name + 7);
 479         }
 480         else if (!strncmp((const char *) ptr->name,
 481                           "sortmap_", 8))
 482         {
 483             std::string value = mp::xml::get_text(ptr);
 484             s->sortmap[(const char *) ptr->name + 8] = value;
 485         }
 486         else if (!strcmp((const char *) ptr->name,
 487                           "sortStrategy"))
 488         {
 489             s->sortStrategy = mp::xml::get_text(ptr);
 490         }
 491     }
 492     return s;
 493 }
 494
 495 void yf::Zoom::Impl::configure_local_records(const xmlNode *ptr, bool test_only)
 496 {
 497     while (ptr && ptr->type != XML_ELEMENT_NODE)
 498         ptr = ptr->next;
 499
 500     if (ptr)
 501     {
 502         if (!strcmp((const char *) ptr->name, "records"))
 503         {
 504             for (ptr = ptr->children; ptr; ptr = ptr->next)
 505             {
 506                 if (ptr->type != XML_ELEMENT_NODE)
 507                     continue;
 508                 if (!strcmp((const char *) ptr->name, "record"))
 509                 {
 510                     SearchablePtr s = parse_torus_record(ptr);
 511                     if (s)
 512                     {
 513                         std::string udb = s->udb;
 514                         if (udb.length())
 515                             s_map[s->udb] = s;
 516                         else
 517                         {
 518                             throw mp::filter::FilterException
 519                                 ("No udb for local torus record");
 520                         }
 521                     }
 522                 }
 523                 else
 524                 {
 525                     throw mp::filter::FilterException
 526                         ("Bad element "
 527                          + std::string((const char *) ptr->name)
 528                          + " in zoom filter inside element "
 529                          "<torus><records>");
 530                 }
 531             }
 532         }
 533         else
 534         {
 535             throw mp::filter::FilterException
 536                 ("Bad element "
 537                  + std::string((const char *) ptr->name)
 538                  + " in zoom filter inside element <torus>");
 539         }
 540     }
 541 }
 542
 543 void yf::Zoom::Impl::configure(const xmlNode *ptr, bool test_only,
 544                                const char *path)
 545 {
 546     content_tmp_file = "/tmp/cf.XXXXXX.p";
 547     if (path && *path)
 548     {
 549         file_path = path;
 550     }
 551     for (ptr = ptr->children; ptr; ptr = ptr->next)
 552     {
 553         if (ptr->type != XML_ELEMENT_NODE)
 554             continue;
 555         else if (!strcmp((const char *) ptr->name, "torus"))
 556         {
 557             const struct _xmlAttr *attr;
 558             for (attr = ptr->properties; attr; attr = attr->next)
 559             {
 560                 if (!strcmp((const char *) attr->name, "url"))
 561                     torus_url = mp::xml::get_text(attr->children);
 562                 else if (!strcmp((const char *) attr->name, "realm"))
 563                     default_realm = mp::xml::get_text(attr->children);
 564                 else if (!strcmp((const char *) attr->name, "xsldir"))
 565                     xsldir = mp::xml::get_text(attr->children);
 566                 else if (!strcmp((const char *) attr->name, "element_transform"))
 567                     element_transform = mp::xml::get_text(attr->children);
 568                 else if (!strcmp((const char *) attr->name, "element_raw"))
 569                     element_raw = mp::xml::get_text(attr->children);
 570                 else if (!strcmp((const char *) attr->name, "proxy"))
 571                     proxy = mp::xml::get_text(attr->children);
 572                 else
 573                     throw mp::filter::FilterException(
 574                         "Bad attribute " + std::string((const char *)
 575                                                        attr->name));
 576             }
 577             configure_local_records(ptr->children, test_only);
 578         }
 579         else if (!strcmp((const char *) ptr->name, "cclmap"))
 580         {
 581             const char *addinfo = 0;
 582             ccl_xml_config(bibset, ptr, &addinfo);
 583         }
 584         else if (!strcmp((const char *) ptr->name, "fieldmap"))
 585         {
 586             const struct _xmlAttr *attr;
 587             std::string ccl_field;
 588             std::string cql_field;
 589             for (attr = ptr->properties; attr; attr = attr->next)
 590             {
 591                 if (!strcmp((const char *) attr->name, "ccl"))
 592                     ccl_field = mp::xml::get_text(attr->children);
 593                 else if (!strcmp((const char *) attr->name, "cql"))
 594                     cql_field = 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             if (cql_field.length())
 601                 fieldmap[cql_field] = ccl_field;
 602         }
 603         else if (!strcmp((const char *) ptr->name, "contentProxy"))
 604         {
 605             const struct _xmlAttr *attr;
 606             for (attr = ptr->properties; attr; attr = attr->next)
 607             {
 608                 if (!strcmp((const char *) attr->name, "server"))
 609                     content_proxy_server = mp::xml::get_text(attr->children);
 610                 else if (!strcmp((const char *) attr->name, "tmp_file"))
 611                     content_tmp_file = mp::xml::get_text(attr->children);
 612                 else
 613                     throw mp::filter::FilterException(
 614                         "Bad attribute " + std::string((const char *)
 615                                                        attr->name));
 616             }
 617         }
 618         else if (!strcmp((const char *) ptr->name, "log"))
 619         {
 620             const struct _xmlAttr *attr;
 621             for (attr = ptr->properties; attr; attr = attr->next)
 622             {
 623                 if (!strcmp((const char *) attr->name, "apdu"))
 624                     apdu_log = mp::xml::get_bool(attr->children, false);
 625                 else
 626                     throw mp::filter::FilterException(
 627                         "Bad attribute " + std::string((const char *)
 628                                                        attr->name));
 629             }
 630         }
 631         else
 632         {
 633             throw mp::filter::FilterException
 634                 ("Bad element "
 635                  + std::string((const char *) ptr->name)
 636                  + " in zoom filter");
 637         }
 638     }
 639 }
 640
 641 yf::Zoom::BackendPtr yf::Zoom::Frontend::get_backend_from_databases(
 642     const mp::Package &package,
 643     std::string &database, int *error, char **addinfo, ODR odr)
 644 {
 645     std::list<BackendPtr>::const_iterator map_it;
 646     if (m_backend && m_backend->m_frontend_database == database)
 647         return m_backend;
 648
 649     std::string input_args;
 650     std::string torus_db;
 651     size_t db_arg_pos = database.find(',');
 652     if (db_arg_pos != std::string::npos)
 653     {
 654         torus_db = database.substr(0, db_arg_pos);
 655         input_args = database.substr(db_arg_pos + 1);
 656     }
 657     else
 658         torus_db = database;
 659
 660     std::string authentication;
 661     std::string proxy;
 662     std::string realm = m_p->default_realm;
 663
 664     const char *param_user = 0;
 665     const char *param_password = 0;
 666     int no_parms = 0;
 667
 668     char **names;
 669     char **values;
 670     int no_out_args = 0;
 671     if (input_args.length())
 672         no_parms = yaz_uri_to_array(input_args.c_str(),
 673                                     odr, &names, &values);
 674     // adding 10 because we'll be adding other URL args
 675     const char **out_names = (const char **)
 676         odr_malloc(odr, (10 + no_parms) * sizeof(*out_names));
 677     const char **out_values = (const char **)
 678         odr_malloc(odr, (10 + no_parms) * sizeof(*out_values));
 679
 680     int i;
 681     for (i = 0; i < no_parms; i++)
 682     {
 683         const char *name = names[i];
 684         const char *value = values[i];
 685         assert(name);
 686         assert(value);
 687         if (!strcmp(name, "user"))
 688             param_user = value;
 689         else if (!strcmp(name, "password"))
 690             param_password = value;
 691         else if (!strcmp(name, "proxy"))
 692             proxy = value;
 693         else if (!strcmp(name, "cproxysession"))
 694         {
 695             out_names[no_out_args] = name;
 696             out_values[no_out_args++] = value;
 697         }
 698         else if (!strcmp(name, "realm"))
 699             realm = value;
 700         else if (name[0] == 'x' && name[1] == '-')
 701         {
 702             out_names[no_out_args] = name;
 703             out_values[no_out_args++] = value;
 704         }
 705         else
 706         {
 707             BackendPtr notfound;
 708             char *msg = (char*) odr_malloc(odr, strlen(name) + 30);
 709             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 710             sprintf(msg, "Bad database argument: %s", name);
 711             *addinfo = msg;
 712             return notfound;
 713         }
 714     }
 715     if (param_user)
 716     {
 717         authentication = std::string(param_user);
 718         if (param_password)
 719             authentication += "/" + std::string(param_password);
 720     }
 721     SearchablePtr sptr;
 722
 723     std::map<std::string,SearchablePtr>::iterator it;
 724     it = m_p->s_map.find(torus_db);
 725     if (it != m_p->s_map.end())
 726         sptr = it->second;
 727     else if (m_p->torus_url.length() > 0)
 728     {
 729         xmlDoc *doc = mp::get_searchable(m_p->torus_url, torus_db, realm,
 730                                          m_p->proxy);
 731         if (!doc)
 732         {
 733             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 734             *addinfo = odr_strdup(odr, database.c_str());
 735             BackendPtr b;
 736             return b;
 737         }
 738         const xmlNode *ptr = xmlDocGetRootElement(doc);
 739         if (ptr)
 740         {   // presumably ptr is a records element node
 741             // parse first record in document
 742             for (ptr = ptr->children; ptr; ptr = ptr->next)
 743             {
 744                 if (ptr->type == XML_ELEMENT_NODE
 745                     && !strcmp((const char *) ptr->name, "record"))
 746                 {
 747                     if (sptr)
 748                     {
 749                         *error = YAZ_BIB1_UNSPECIFIED_ERROR;
 750                         *addinfo = (char*) odr_malloc(odr, 40 + database.length()),
 751                         sprintf(*addinfo, "multiple records for udb=%s",
 752                                  database.c_str());
 753                         xmlFreeDoc(doc);
 754                         BackendPtr b;
 755                         return b;
 756                     }
 757                     sptr = m_p->parse_torus_record(ptr);
 758                 }
 759             }
 760         }
 761         xmlFreeDoc(doc);
 762     }
 763
 764     if (!sptr)
 765     {
 766         *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 767         *addinfo = odr_strdup(odr, database.c_str());
 768         BackendPtr b;
 769         return b;
 770     }
 771
 772     xsltStylesheetPtr xsp = 0;
 773     if (sptr->transform_xsl_content.length())
 774     {
 775         xmlDoc *xsp_doc = xmlParseMemory(sptr->transform_xsl_content.c_str(),
 776                                          sptr->transform_xsl_content.length());
 777         if (!xsp_doc)
 778         {
 779             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 780             *addinfo = (char *) odr_malloc(odr, 40);
 781             sprintf(*addinfo, "xmlParseMemory failed");
 782             BackendPtr b;
 783             return b;
 784         }
 785         xsp = xsltParseStylesheetDoc(xsp_doc);
 786         if (!xsp)
 787         {
 788             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 789             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 790             BackendPtr b;
 791             xmlFreeDoc(xsp_doc);
 792             return b;
 793         }
 794     }
 795     else if (sptr->transform_xsl_fname.length())
 796     {
 797         const char *path = 0;
 798
 799         if (m_p->xsldir.length())
 800             path = m_p->xsldir.c_str();
 801         else
 802             path = m_p->file_path.c_str();
 803         std::string fname;
 804
 805         char fullpath[1024];
 806         char *cp = yaz_filepath_resolve(sptr->transform_xsl_fname.c_str(),
 807                                         path, 0, fullpath);
 808         if (cp)
 809             fname.assign(cp);
 810         else
 811         {
 812             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 813             *addinfo = (char *)
 814                 odr_malloc(odr, 40 + sptr->transform_xsl_fname.length());
 815             sprintf(*addinfo, "File could not be read: %s",
 816                     sptr->transform_xsl_fname.c_str());
 817             BackendPtr b;
 818             return b;
 819         }
 820         xmlDoc *xsp_doc = xmlParseFile(fname.c_str());
 821         if (!xsp_doc)
 822         {
 823             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 824             *addinfo = (char *) odr_malloc(odr, 40 + fname.length());
 825             sprintf(*addinfo, "xmlParseFile failed. File: %s", fname.c_str());
 826             BackendPtr b;
 827             return b;
 828         }
 829         xsp = xsltParseStylesheetDoc(xsp_doc);
 830         if (!xsp)
 831         {
 832             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 833             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 834             BackendPtr b;
 835             xmlFreeDoc(xsp_doc);
 836             return b;
 837         }
 838     }
 839
 840     m_backend.reset();
 841
 842     BackendPtr b(new Backend(sptr));
 843
 844     b->xsp = xsp;
 845     b->m_frontend_database = database;
 846
 847     if (sptr->query_encoding.length())
 848         b->set_option("rpnCharset", sptr->query_encoding);
 849
 850     b->set_option("timeout", "40");
 851
 852     if (m_p->apdu_log)
 853         b->set_option("apdulog", "1");
 854
 855     if (sptr->piggyback)
 856         b->set_option("count", "1"); /* some SRU servers INSIST on getting
 857                                         maximumRecords > 0 */
 858     b->set_option("piggyback", sptr->piggyback ? "1" : "0");
 859
 860     if (authentication.length() == 0)
 861         authentication = sptr->authentication;
 862
 863     if (proxy.length() == 0)
 864         proxy = sptr->cfProxy;
 865
 866     if (sptr->cfAuth.length())
 867     {
 868         // A CF target
 869         b->set_option("user", sptr->cfAuth);
 870         if (authentication.length())
 871         {
 872             size_t found = authentication.find('/');
 873             if (found != std::string::npos)
 874             {
 875                 out_names[no_out_args] = "user";
 876                 out_values[no_out_args++] =
 877                     odr_strdup(odr, authentication.substr(0, found).c_str());
 878
 879                 out_names[no_out_args] = "password";
 880                 out_values[no_out_args++] =
 881                     odr_strdup(odr, authentication.substr(found+1).c_str());
 882             }
 883             else
 884             {
 885                 out_names[no_out_args] = "user";
 886                 out_values[no_out_args++] =
 887                     odr_strdup(odr, authentication.c_str());
 888             }
 889         }
 890         if (proxy.length())
 891         {
 892             out_names[no_out_args] = "proxy";
 893             out_values[no_out_args++] = odr_strdup(odr, proxy.c_str());
 894         }
 895         if (sptr->cfSubDB.length())
 896         {
 897             out_names[no_out_args] = "subdatabase";
 898             out_values[no_out_args++] = odr_strdup(odr, sptr->cfSubDB.c_str());
 899         }
 900     }
 901     else
 902     {
 903         size_t found = authentication.find('/');
 904
 905         if (sptr->sru.length() && found != std::string::npos)
 906         {
 907             b->set_option("user", authentication.substr(0, found));
 908             b->set_option("password", authentication.substr(found+1));
 909         }
 910         else
 911             b->set_option("user", authentication);
 912
 913         if (proxy.length())
 914             b->set_option("proxy", proxy);
 915     }
 916     if (b->sptr->contentConnector.length())
 917     {
 918         char *fname = (char *) xmalloc(m_p->content_tmp_file.length() + 8);
 919         strcpy(fname, m_p->content_tmp_file.c_str());
 920         char *xx = strstr(fname, "XXXXXX");
 921         if (!xx)
 922         {
 923             xx = fname + strlen(fname);
 924             strcat(fname, "XXXXXX");
 925         }
 926         char tmp_char = xx[6];
 927         sprintf(xx, "%06d", ((unsigned) rand()) % 1000000);
 928         xx[6] = tmp_char;
 929
 930         FILE *file = fopen(fname, "w");
 931         if (!file)
 932         {
 933             package.log("zoom", YLOG_WARN|YLOG_ERRNO, "create %s", fname);
 934             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 935             *addinfo = (char *)  odr_malloc(odr, 40 + strlen(fname));
 936             sprintf(*addinfo, "Could not create %s", fname);
 937             xfree(fname);
 938             BackendPtr backend_null;
 939             return backend_null;
 940         }
 941         b->content_session_id.assign(xx, 6);
 942         WRBUF w = wrbuf_alloc();
 943         wrbuf_puts(w, "#content_proxy\n");
 944         wrbuf_printf(w, "connector: %s\n", b->sptr->contentConnector.c_str());
 945         if (authentication.length())
 946             wrbuf_printf(w, "auth: %s\n", authentication.c_str());
 947         if (proxy.length())
 948             wrbuf_printf(w, "proxy: %s\n", proxy.c_str());
 949         if (sptr->cfProxy.length())
 950             wrbuf_printf(w, "cfproxy: %s\n", sptr->cfProxy.c_str());
 951
 952         fwrite(wrbuf_buf(w), 1, wrbuf_len(w), file);
 953         fclose(file);
 954         package.log("zoom", YLOG_LOG, "file %s created\n", fname);
 955         xfree(fname);
 956     }
 957
 958     std::string url;
 959     if (sptr->sru.length())
 960     {
 961         url = "http://" + sptr->target;
 962         b->set_option("sru", sptr->sru);
 963     }
 964     else
 965     {
 966         url = sptr->target;
 967     }
 968     if (no_out_args)
 969     {
 970         char *x_args = 0;
 971         out_names[no_out_args] = 0; // terminate list
 972
 973         yaz_array_to_uri(&x_args, odr, (char **) out_names,
 974                          (char **) out_values);
 975         url += "," + std::string(x_args);
 976     }
 977     package.log("zoom", YLOG_LOG, "url=%s", url.c_str());
 978     b->connect(url, error, addinfo, odr);
 979     if (*error == 0)
 980     {
 981         m_backend = b;
 982     }
 983     return b;
 984 }
 985
 986 void yf::Zoom::Frontend::prepare_elements(BackendPtr b,
 987                                           Odr_oid *preferredRecordSyntax,
 988                                           const char *element_set_name,
 989                                           bool &enable_pz2_retrieval,
 990                                           bool &enable_pz2_transform,
 991                                           bool &assume_marc8_charset)
 992
 993 {
 994     char oid_name_str[OID_STR_MAX];
 995     const char *syntax_name = 0;
 996
 997     if (preferredRecordSyntax &&
 998         !oid_oidcmp(preferredRecordSyntax, yaz_oid_recsyn_xml)
 999         && element_set_name)
1000     {
1001         if (!strcmp(element_set_name, m_p->element_transform.c_str()))
1002         {
1003             enable_pz2_retrieval = true;
1004             enable_pz2_transform = true;
1005         }
1006         else if (!strcmp(element_set_name, m_p->element_raw.c_str()))
1007         {
1008             enable_pz2_retrieval = true;
1009         }
1010     }
1011
1012     if (enable_pz2_retrieval)
1013     {
1014         std::string configured_request_syntax = b->sptr->request_syntax;
1015         if (configured_request_syntax.length())
1016         {
1017             syntax_name = configured_request_syntax.c_str();
1018             const Odr_oid *syntax_oid =
1019                 yaz_string_to_oid(yaz_oid_std(), CLASS_RECSYN, syntax_name);
1020             if (!oid_oidcmp(syntax_oid, yaz_oid_recsyn_usmarc)
1021                 || !oid_oidcmp(syntax_oid, yaz_oid_recsyn_opac))
1022                 assume_marc8_charset = true;
1023         }
1024     }
1025     else if (preferredRecordSyntax)
1026         syntax_name =
1027             yaz_oid_to_string_buf(preferredRecordSyntax, 0, oid_name_str);
1028
1029     if (b->sptr->sru.length())
1030         syntax_name = "XML";
1031
1032     b->set_option("preferredRecordSyntax", syntax_name);
1033
1034     if (enable_pz2_retrieval)
1035     {
1036         element_set_name = 0;
1037         if (b->sptr->element_set.length())
1038             element_set_name = b->sptr->element_set.c_str();
1039     }
1040
1041     b->set_option("elementSetName", element_set_name);
1042     if (b->sptr->sru.length() && element_set_name)
1043         b->set_option("schema", element_set_name);
1044 }
1045
1046 Z_Records *yf::Zoom::Frontend::get_records(Odr_int start,
1047                                            Odr_int number_to_present,
1048                                            int *error,
1049                                            char **addinfo,
1050                                            Odr_int *number_of_records_returned,
1051                                            ODR odr,
1052                                            BackendPtr b,
1053                                            Odr_oid *preferredRecordSyntax,
1054                                            const char *element_set_name)
1055 {
1056     *number_of_records_returned = 0;
1057     Z_Records *records = 0;
1058     bool enable_pz2_retrieval = false; // whether target profile is used
1059     bool enable_pz2_transform = false; // whether XSLT is used as well
1060     bool assume_marc8_charset = false;
1061
1062     prepare_elements(b, preferredRecordSyntax,
1063                      element_set_name,
1064                      enable_pz2_retrieval,
1065                      enable_pz2_transform,
1066                      assume_marc8_charset);
1067
1068     if (start < 0 || number_to_present <=0)
1069         return records;
1070
1071     if (number_to_present > 10000)
1072         number_to_present = 10000;
1073
1074     ZOOM_record *recs = (ZOOM_record *)
1075         odr_malloc(odr, (size_t) number_to_present * sizeof(*recs));
1076
1077     b->present(start, number_to_present, recs, error, addinfo, odr);
1078
1079     int i = 0;
1080     if (!*error)
1081     {
1082         for (i = 0; i < number_to_present; i++)
1083             if (!recs[i])
1084                 break;
1085     }
1086     if (i > 0)
1087     {  // only return records if no error and at least one record
1088         char *odr_database = odr_strdup(odr,
1089                                         b->m_frontend_database.c_str());
1090         Z_NamePlusRecordList *npl = (Z_NamePlusRecordList *)
1091             odr_malloc(odr, sizeof(*npl));
1092         *number_of_records_returned = i;
1093         npl->num_records = i;
1094         npl->records = (Z_NamePlusRecord **)
1095             odr_malloc(odr, i * sizeof(*npl->records));
1096         for (i = 0; i < number_to_present; i++)
1097         {
1098             Z_NamePlusRecord *npr = 0;
1099             const char *addinfo;
1100             int sur_error = ZOOM_record_error(recs[i], 0 /* msg */,
1101                                               &addinfo, 0 /* diagset */);
1102
1103             if (sur_error)
1104             {
1105                 npr = zget_surrogateDiagRec(odr, odr_database, sur_error,
1106                                             addinfo);
1107             }
1108             else if (enable_pz2_retrieval)
1109             {
1110                 char rec_type_str[100];
1111                 const char *record_encoding = 0;
1112
1113                 if (b->sptr->record_encoding.length())
1114                     record_encoding = b->sptr->record_encoding.c_str();
1115                 else if (assume_marc8_charset)
1116                     record_encoding = "marc8";
1117
1118                 strcpy(rec_type_str, b->sptr->use_turbomarc ? "txml" : "xml");
1119                 if (record_encoding)
1120                 {
1121                     strcat(rec_type_str, "; charset=");
1122                     strcat(rec_type_str, record_encoding);
1123                 }
1124
1125                 int rec_len;
1126                 xmlChar *xmlrec_buf = 0;
1127                 const char *rec_buf = ZOOM_record_get(recs[i], rec_type_str,
1128                                                       &rec_len);
1129                 if (!rec_buf && !npr)
1130                 {
1131                     std::string addinfo("ZOOM_record_get failed for type ");
1132
1133                     addinfo += rec_type_str;
1134                     npr = zget_surrogateDiagRec(
1135                         odr, odr_database,
1136                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1137                         addinfo.c_str());
1138                 }
1139
1140                 if (rec_buf && b->xsp && enable_pz2_transform)
1141                 {
1142                     xmlDoc *rec_doc = xmlParseMemory(rec_buf, rec_len);
1143                     if (!rec_doc)
1144                     {
1145                         npr = zget_surrogateDiagRec(
1146                             odr, odr_database,
1147                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1148                             "xml parse failed for record");
1149                     }
1150                     else
1151                     {
1152                         xmlDoc *rec_res =
1153                             xsltApplyStylesheet(b->xsp, rec_doc, 0);
1154
1155                         if (rec_res)
1156                         {
1157                             xsltSaveResultToString(&xmlrec_buf, &rec_len,
1158                                                    rec_res, b->xsp);
1159                             rec_buf = (const char *) xmlrec_buf;
1160
1161                             xmlFreeDoc(rec_res);
1162                         }
1163                         if (!rec_buf)
1164                         {
1165                             std::string addinfo;
1166
1167                             addinfo = "xslt apply failed for "
1168                                 + b->sptr->transform_xsl_fname;
1169                             npr = zget_surrogateDiagRec(
1170                                 odr, odr_database,
1171                                 YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1172                                 addinfo.c_str());
1173                         }
1174                         xmlFreeDoc(rec_doc);
1175                     }
1176                 }
1177
1178                 if (rec_buf)
1179                 {
1180                     xmlDoc *doc = xmlParseMemory(rec_buf, rec_len);
1181                     std::string res =
1182                         mp::xml::url_recipe_handle(doc, b->sptr->urlRecipe);
1183                     if (res.length() && b->content_session_id.length())
1184                     {
1185                         size_t off = res.find_first_of("://");
1186                         if (off != std::string::npos)
1187                         {
1188                             char tmp[1024];
1189                             sprintf(tmp, "%s.%s/",
1190                                     b->content_session_id.c_str(),
1191                                     m_p->content_proxy_server.c_str());
1192                             res.insert(off + 3, tmp);
1193                         }
1194                     }
1195                     if (res.length())
1196                     {
1197                         xmlNode *ptr = xmlDocGetRootElement(doc);
1198                         while (ptr && ptr->type != XML_ELEMENT_NODE)
1199                             ptr = ptr->next;
1200                         xmlNode *c =
1201                             xmlNewChild(ptr, 0, BAD_CAST "metadata", 0);
1202                         xmlNewProp(c, BAD_CAST "type", BAD_CAST
1203                                    "generated-url");
1204                         xmlNode * t = xmlNewText(BAD_CAST res.c_str());
1205                         xmlAddChild(c, t);
1206
1207                         if (xmlrec_buf)
1208                             xmlFree(xmlrec_buf);
1209
1210                         xmlDocDumpMemory(doc, &xmlrec_buf, &rec_len);
1211                         rec_buf = (const char *) xmlrec_buf;
1212                     }
1213                     xmlFreeDoc(doc);
1214                 }
1215                 if (!npr)
1216                 {
1217                     if (!rec_buf)
1218                         npr = zget_surrogateDiagRec(
1219                             odr, odr_database,
1220                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1221                             rec_type_str);
1222                     else
1223                     {
1224                         npr = (Z_NamePlusRecord *)
1225                             odr_malloc(odr, sizeof(*npr));
1226                         npr->databaseName = odr_database;
1227                         npr->which = Z_NamePlusRecord_databaseRecord;
1228                         npr->u.databaseRecord =
1229                             z_ext_record_xml(odr, rec_buf, rec_len);
1230                     }
1231                 }
1232                 if (xmlrec_buf)
1233                     xmlFree(xmlrec_buf);
1234             }
1235             else
1236             {
1237                 Z_External *ext =
1238                     (Z_External *) ZOOM_record_get(recs[i], "ext", 0);
1239                 if (ext)
1240                 {
1241                     npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
1242                     npr->databaseName = odr_database;
1243                     npr->which = Z_NamePlusRecord_databaseRecord;
1244                     npr->u.databaseRecord = ext;
1245                 }
1246                 else
1247                 {
1248                     npr = zget_surrogateDiagRec(
1249                         odr, odr_database,
1250                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1251                         "ZOOM_record, type ext");
1252                 }
1253             }
1254             npl->records[i] = npr;
1255         }
1256         records = (Z_Records*) odr_malloc(odr, sizeof(*records));
1257         records->which = Z_Records_DBOSD;
1258         records->u.databaseOrSurDiagnostics = npl;
1259     }
1260     return records;
1261 }
1262
1263 struct cql_node *yf::Zoom::Impl::convert_cql_fields(struct cql_node *cn,
1264                                                     ODR odr)
1265 {
1266     struct cql_node *r = 0;
1267     if (!cn)
1268         return 0;
1269     switch (cn->which)
1270     {
1271     case CQL_NODE_ST:
1272         if (cn->u.st.index)
1273         {
1274             std::map<std::string,std::string>::const_iterator it;
1275             it = fieldmap.find(cn->u.st.index);
1276             if (it == fieldmap.end())
1277                 return cn;
1278             if (it->second.length())
1279                 cn->u.st.index = odr_strdup(odr, it->second.c_str());
1280             else
1281                 cn->u.st.index = 0;
1282         }
1283         break;
1284     case CQL_NODE_BOOL:
1285         r = convert_cql_fields(cn->u.boolean.left, odr);
1286         if (!r)
1287             r = convert_cql_fields(cn->u.boolean.right, odr);
1288         break;
1289     case CQL_NODE_SORT:
1290         r = convert_cql_fields(cn->u.sort.search, odr);
1291         break;
1292     }
1293     return r;
1294 }
1295
1296 void yf::Zoom::Frontend::handle_search(mp::Package &package)
1297 {
1298     Z_GDU *gdu = package.request().get();
1299     Z_APDU *apdu_req = gdu->u.z3950;
1300     Z_APDU *apdu_res = 0;
1301     mp::odr odr;
1302     Z_SearchRequest *sr = apdu_req->u.searchRequest;
1303     if (sr->num_databaseNames != 1)
1304     {
1305         apdu_res = odr.create_searchResponse(
1306             apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
1307         package.response() = apdu_res;
1308         return;
1309     }
1310
1311     int error = 0;
1312     char *addinfo = 0;
1313     std::string db(sr->databaseNames[0]);
1314     BackendPtr b = get_backend_from_databases(package, db, &error,
1315                                               &addinfo, odr);
1316     if (error)
1317     {
1318         apdu_res =
1319             odr.create_searchResponse(apdu_req, error, addinfo);
1320         package.response() = apdu_res;
1321         return;
1322     }
1323
1324     b->set_option("setname", "default");
1325
1326     bool enable_pz2_retrieval = false;
1327     bool enable_pz2_transform = false;
1328     bool assume_marc8_charset = false;
1329     prepare_elements(b, sr->preferredRecordSyntax, 0 /*element_set_name */,
1330                      enable_pz2_retrieval,
1331                      enable_pz2_transform,
1332                      assume_marc8_charset);
1333
1334     Odr_int hits = 0;
1335     Z_Query *query = sr->query;
1336     WRBUF ccl_wrbuf = 0;
1337     WRBUF pqf_wrbuf = 0;
1338     std::string sortkeys;
1339
1340     if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
1341     {
1342         // RPN
1343         pqf_wrbuf = wrbuf_alloc();
1344         yaz_rpnquery_to_wrbuf(pqf_wrbuf, query->u.type_1);
1345     }
1346     else if (query->which == Z_Query_type_2)
1347     {
1348         // CCL
1349         ccl_wrbuf = wrbuf_alloc();
1350         wrbuf_write(ccl_wrbuf, (const char *) query->u.type_2->buf,
1351                     query->u.type_2->len);
1352     }
1353     else if (query->which == Z_Query_type_104 &&
1354              query->u.type_104->which == Z_External_CQL)
1355     {
1356         // CQL
1357         const char *cql = query->u.type_104->u.cql;
1358         CQL_parser cp = cql_parser_create();
1359         int r = cql_parser_string(cp, cql);
1360         if (r)
1361         {
1362             cql_parser_destroy(cp);
1363             apdu_res =
1364                 odr.create_searchResponse(apdu_req,
1365                                           YAZ_BIB1_MALFORMED_QUERY,
1366                                           "CQL syntax error");
1367             package.response() = apdu_res;
1368             return;
1369         }
1370         struct cql_node *cn = cql_parser_result(cp);
1371         struct cql_node *cn_error = m_p->convert_cql_fields(cn, odr);
1372         if (cn_error)
1373         {
1374             // hopefully we are getting a ptr to a index+relation+term node
1375             addinfo = 0;
1376             if (cn_error->which == CQL_NODE_ST)
1377                 addinfo = cn_error->u.st.index;
1378
1379             apdu_res =
1380                 odr.create_searchResponse(apdu_req,
1381                                           YAZ_BIB1_UNSUPP_USE_ATTRIBUTE,
1382                                           addinfo);
1383             package.response() = apdu_res;
1384             return;
1385         }
1386         char ccl_buf[1024];
1387
1388         r = cql_to_ccl_buf(cn, ccl_buf, sizeof(ccl_buf));
1389         if (r == 0)
1390         {
1391             ccl_wrbuf = wrbuf_alloc();
1392             wrbuf_puts(ccl_wrbuf, ccl_buf);
1393
1394             WRBUF sru_sortkeys_wrbuf = wrbuf_alloc();
1395
1396             cql_sortby_to_sortkeys(cn, wrbuf_vp_puts, sru_sortkeys_wrbuf);
1397             WRBUF sort_spec_wrbuf = wrbuf_alloc();
1398             yaz_srw_sortkeys_to_sort_spec(wrbuf_cstr(sru_sortkeys_wrbuf),
1399                                           sort_spec_wrbuf);
1400             wrbuf_destroy(sru_sortkeys_wrbuf);
1401
1402             yaz_tok_cfg_t tc = yaz_tok_cfg_create();
1403             yaz_tok_parse_t tp =
1404                 yaz_tok_parse_buf(tc, wrbuf_cstr(sort_spec_wrbuf));
1405             yaz_tok_cfg_destroy(tc);
1406
1407             /* go through sortspec and map fields */
1408             int token = yaz_tok_move(tp);
1409             while (token != YAZ_TOK_EOF)
1410             {
1411                 if (token == YAZ_TOK_STRING)
1412                 {
1413                     const char *field = yaz_tok_parse_string(tp);
1414                     std::map<std::string,std::string>::iterator it;
1415                     it = b->sptr->sortmap.find(field);
1416                     if (it != b->sptr->sortmap.end())
1417                         sortkeys += it->second;
1418                     else
1419                         sortkeys += field;
1420                 }
1421                 sortkeys += " ";
1422                 token = yaz_tok_move(tp);
1423                 if (token == YAZ_TOK_STRING)
1424                 {
1425                     sortkeys += yaz_tok_parse_string(tp);
1426                 }
1427                 if (token != YAZ_TOK_EOF)
1428                 {
1429                     sortkeys += " ";
1430                     token = yaz_tok_move(tp);
1431                 }
1432             }
1433             yaz_tok_parse_destroy(tp);
1434             wrbuf_destroy(sort_spec_wrbuf);
1435         }
1436         cql_parser_destroy(cp);
1437         if (r)
1438         {
1439             apdu_res =
1440                 odr.create_searchResponse(apdu_req,
1441                                           YAZ_BIB1_MALFORMED_QUERY,
1442                                           "CQL to CCL conversion error");
1443             package.response() = apdu_res;
1444             return;
1445         }
1446     }
1447     else
1448     {
1449         apdu_res =
1450             odr.create_searchResponse(apdu_req, YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
1451         package.response() = apdu_res;
1452         return;
1453     }
1454
1455     if (ccl_wrbuf)
1456     {
1457         // CCL to PQF
1458         assert(pqf_wrbuf == 0);
1459         int cerror, cpos;
1460         struct ccl_rpn_node *cn;
1461         package.log("zoom", YLOG_LOG, "CCL: %s", wrbuf_cstr(ccl_wrbuf));
1462         cn = ccl_find_str(b->sptr->ccl_bibset, wrbuf_cstr(ccl_wrbuf),
1463                           &cerror, &cpos);
1464         wrbuf_destroy(ccl_wrbuf);
1465         if (!cn)
1466         {
1467             char *addinfo = odr_strdup(odr, ccl_err_msg(cerror));
1468             int z3950_diag = YAZ_BIB1_MALFORMED_QUERY;
1469
1470             switch (cerror)
1471             {
1472             case CCL_ERR_UNKNOWN_QUAL:
1473                 z3950_diag = YAZ_BIB1_UNSUPP_USE_ATTRIBUTE;
1474                 break;
1475             case CCL_ERR_TRUNC_NOT_LEFT:
1476             case CCL_ERR_TRUNC_NOT_RIGHT:
1477             case CCL_ERR_TRUNC_NOT_BOTH:
1478                 z3950_diag = YAZ_BIB1_UNSUPP_TRUNCATION_ATTRIBUTE;
1479                 break;
1480             }
1481             apdu_res =
1482                 odr.create_searchResponse(apdu_req, z3950_diag, addinfo);
1483             package.response() = apdu_res;
1484             return;
1485         }
1486         pqf_wrbuf = wrbuf_alloc();
1487         ccl_pquery(pqf_wrbuf, cn);
1488         package.log("zoom", YLOG_LOG, "RPN: %s", wrbuf_cstr(pqf_wrbuf));
1489         ccl_rpn_delete(cn);
1490     }
1491
1492     assert(pqf_wrbuf);
1493
1494     ZOOM_query q = ZOOM_query_create();
1495     ZOOM_query_sortby2(q, b->sptr->sortStrategy.c_str(), sortkeys.c_str());
1496
1497     if (b->get_option("sru"))
1498     {
1499         int status = 0;
1500         Z_RPNQuery *zquery;
1501         zquery = p_query_rpn(odr, wrbuf_cstr(pqf_wrbuf));
1502         WRBUF wrb = wrbuf_alloc();
1503
1504         if (!strcmp(b->get_option("sru"), "solr"))
1505         {
1506             solr_transform_t cqlt = solr_transform_create();
1507
1508             status = solr_transform_rpn2solr_wrbuf(cqlt, wrb, zquery);
1509
1510             solr_transform_close(cqlt);
1511         }
1512         else
1513         {
1514             cql_transform_t cqlt = cql_transform_create();
1515
1516             status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery);
1517
1518             cql_transform_close(cqlt);
1519         }
1520         if (status == 0)
1521         {
1522             ZOOM_query_cql(q, wrbuf_cstr(wrb));
1523             package.log("zoom", YLOG_LOG, "CQL: %s", wrbuf_cstr(wrb));
1524             b->search(q, &hits, &error, &addinfo, odr);
1525         }
1526         ZOOM_query_destroy(q);
1527
1528         wrbuf_destroy(wrb);
1529         wrbuf_destroy(pqf_wrbuf);
1530         if (status)
1531         {
1532             apdu_res =
1533                 odr.create_searchResponse(apdu_req, YAZ_BIB1_MALFORMED_QUERY,
1534                                           "can not convert from RPN to CQL/SOLR");
1535             package.response() = apdu_res;
1536             return;
1537         }
1538     }
1539     else
1540     {
1541         ZOOM_query_prefix(q, wrbuf_cstr(pqf_wrbuf));
1542         package.log("zoom", YLOG_LOG, "search PQF: %s", wrbuf_cstr(pqf_wrbuf));
1543         b->search(q, &hits, &error, &addinfo, odr);
1544         ZOOM_query_destroy(q);
1545         wrbuf_destroy(pqf_wrbuf);
1546     }
1547
1548     const char *element_set_name = 0;
1549     Odr_int number_to_present = 0;
1550     if (!error)
1551         mp::util::piggyback_sr(sr, hits, number_to_present, &element_set_name);
1552
1553     Odr_int number_of_records_returned = 0;
1554     Z_Records *records = get_records(
1555         0, number_to_present, &error, &addinfo,
1556         &number_of_records_returned, odr, b, sr->preferredRecordSyntax,
1557         element_set_name);
1558     apdu_res = odr.create_searchResponse(apdu_req, error, addinfo);
1559     if (records)
1560     {
1561         apdu_res->u.searchResponse->records = records;
1562         apdu_res->u.searchResponse->numberOfRecordsReturned =
1563             odr_intdup(odr, number_of_records_returned);
1564     }
1565     apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
1566     package.response() = apdu_res;
1567 }
1568
1569 void yf::Zoom::Frontend::handle_present(mp::Package &package)
1570 {
1571     Z_GDU *gdu = package.request().get();
1572     Z_APDU *apdu_req = gdu->u.z3950;
1573     Z_APDU *apdu_res = 0;
1574     Z_PresentRequest *pr = apdu_req->u.presentRequest;
1575
1576     mp::odr odr;
1577     if (!m_backend)
1578     {
1579         package.response() = odr.create_presentResponse(
1580             apdu_req, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST, 0);
1581         return;
1582     }
1583     const char *element_set_name = 0;
1584     Z_RecordComposition *comp = pr->recordComposition;
1585     if (comp && comp->which != Z_RecordComp_simple)
1586     {
1587         package.response() = odr.create_presentResponse(
1588             apdu_req,
1589             YAZ_BIB1_PRESENT_COMP_SPEC_PARAMETER_UNSUPP, 0);
1590         return;
1591     }
1592     if (comp && comp->u.simple->which == Z_ElementSetNames_generic)
1593         element_set_name = comp->u.simple->u.generic;
1594     Odr_int number_of_records_returned = 0;
1595     int error = 0;
1596     char *addinfo = 0;
1597     Z_Records *records = get_records(
1598         *pr->resultSetStartPoint - 1, *pr->numberOfRecordsRequested,
1599         &error, &addinfo, &number_of_records_returned, odr, m_backend,
1600         pr->preferredRecordSyntax, element_set_name);
1601
1602     apdu_res = odr.create_presentResponse(apdu_req, error, addinfo);
1603     if (records)
1604     {
1605         apdu_res->u.presentResponse->records = records;
1606         apdu_res->u.presentResponse->numberOfRecordsReturned =
1607             odr_intdup(odr, number_of_records_returned);
1608     }
1609     package.response() = apdu_res;
1610 }
1611
1612 void yf::Zoom::Frontend::handle_package(mp::Package &package)
1613 {
1614     Z_GDU *gdu = package.request().get();
1615     if (!gdu)
1616         ;
1617     else if (gdu->which == Z_GDU_Z3950)
1618     {
1619         Z_APDU *apdu_req = gdu->u.z3950;
1620         if (apdu_req->which == Z_APDU_initRequest)
1621         {
1622             mp::odr odr;
1623             package.response() = odr.create_close(
1624                 apdu_req,
1625                 Z_Close_protocolError,
1626                 "double init");
1627         }
1628         else if (apdu_req->which == Z_APDU_searchRequest)
1629         {
1630             handle_search(package);
1631         }
1632         else if (apdu_req->which == Z_APDU_presentRequest)
1633         {
1634             handle_present(package);
1635         }
1636         else
1637         {
1638             mp::odr odr;
1639             package.response() = odr.create_close(
1640                 apdu_req,
1641                 Z_Close_protocolError,
1642                 "zoom filter cannot handle this APDU");
1643             package.session().close();
1644         }
1645     }
1646     else
1647     {
1648         package.session().close();
1649     }
1650 }
1651
1652 void yf::Zoom::Impl::process(mp::Package &package)
1653 {
1654     FrontendPtr f = get_frontend(package);
1655     Z_GDU *gdu = package.request().get();
1656
1657     if (f->m_is_virtual)
1658     {
1659         f->handle_package(package);
1660     }
1661     else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1662              Z_APDU_initRequest)
1663     {
1664         Z_InitRequest *req = gdu->u.z3950->u.initRequest;
1665         f->m_init_gdu = gdu;
1666
1667         mp::odr odr;
1668         Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
1669         Z_InitResponse *resp = apdu->u.initResponse;
1670
1671         int i;
1672         static const int masks[] = {
1673             Z_Options_search,
1674             Z_Options_present,
1675             -1
1676         };
1677         for (i = 0; masks[i] != -1; i++)
1678             if (ODR_MASK_GET(req->options, masks[i]))
1679                 ODR_MASK_SET(resp->options, masks[i]);
1680
1681         static const int versions[] = {
1682             Z_ProtocolVersion_1,
1683             Z_ProtocolVersion_2,
1684             Z_ProtocolVersion_3,
1685             -1
1686         };
1687         for (i = 0; versions[i] != -1; i++)
1688             if (ODR_MASK_GET(req->protocolVersion, versions[i]))
1689                 ODR_MASK_SET(resp->protocolVersion, versions[i]);
1690             else
1691                 break;
1692
1693         *resp->preferredMessageSize = *req->preferredMessageSize;
1694         *resp->maximumRecordSize = *req->maximumRecordSize;
1695
1696         package.response() = apdu;
1697         f->m_is_virtual = true;
1698     }
1699     else
1700         package.move();
1701
1702     release_frontend(package);
1703 }
1704
1705
1706 static mp::filter::Base* filter_creator()
1707 {
1708     return new mp::filter::Zoom;
1709 }
1710
1711 extern "C" {
1712     struct metaproxy_1_filter_struct metaproxy_1_filter_zoom = {
1713         0,
1714         "zoom",
1715         filter_creator
1716     };
1717 }
1718
1719
1720 /*
1721  * Local variables:
1722  * c-basic-offset: 4
1723  * c-file-style: "Stroustrup"
1724  * indent-tabs-mode: nil
1725  * End:
1726  * vim: shiftwidth=4 tabstop=8 expandtab
1727  */
1728