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 <metaproxy/package.hpp>
  25 #include <metaproxy/util.hpp>
  26 #include <metaproxy/xmlutil.hpp>
  27 #include "torus.hpp"
  28
  29 #include <libxslt/xsltutils.h>
  30 #include <libxslt/transform.h>
  31
  32 #include <boost/thread/mutex.hpp>
  33 #include <boost/thread/condition.hpp>
  34
  35 #include <yaz/yaz-version.h>
  36 #include <yaz/tpath.h>
  37 #include <yaz/srw.h>
  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 #include <yaz/zoom.h>
  52
  53 namespace mp = metaproxy_1;
  54 namespace yf = mp::filter;
  55
  56 namespace metaproxy_1 {
  57     namespace filter {
  58         class Zoom::Searchable : boost::noncopyable {
  59           public:
  60             std::string authentication;
  61             std::string cfAuth;
  62             std::string cfProxy;
  63             std::string cfSubDB;
  64             std::string udb;
  65             std::string target;
  66             std::string query_encoding;
  67             std::string sru;
  68             std::string sru_version;
  69             std::string request_syntax;
  70             std::string element_set;
  71             std::string record_encoding;
  72             std::string transform_xsl_fname;
  73             std::string transform_xsl_content;
  74             std::string urlRecipe;
  75             std::string contentConnector;
  76             std::string sortStrategy;
  77             bool use_turbomarc;
  78             bool piggyback;
  79             CCL_bibset ccl_bibset;
  80             std::map<std::string, std::string> sortmap;
  81             Searchable(CCL_bibset base);
  82             ~Searchable();
  83         };
  84         class Zoom::Backend : boost::noncopyable {
  85             friend class Impl;
  86             friend class Frontend;
  87             std::string zurl;
  88             WRBUF m_apdu_wrbuf;
  89             ZOOM_connection m_connection;
  90             ZOOM_resultset m_resultset;
  91             std::string m_frontend_database;
  92             SearchablePtr sptr;
  93             xsltStylesheetPtr xsp;
  94             std::string content_session_id;
  95         public:
  96             Backend(SearchablePtr sptr);
  97             ~Backend();
  98             void connect(std::string zurl, int *error, char **addinfo,
  99                          ODR odr);
 100             void search(ZOOM_query q, Odr_int *hits,
 101                         int *error, char **addinfo, ODR odr);
 102             void present(Odr_int start, Odr_int number, ZOOM_record *recs,
 103                          int *error, char **addinfo, ODR odr);
 104             void set_option(const char *name, const char *value);
 105             void set_option(const char *name, std::string value);
 106             const char *get_option(const char *name);
 107             void get_zoom_error(int *error, char **addinfo, ODR odr);
 108         };
 109         class Zoom::Frontend : boost::noncopyable {
 110             friend class Impl;
 111             Impl *m_p;
 112             bool m_is_virtual;
 113             bool m_in_use;
 114             yazpp_1::GDU m_init_gdu;
 115             BackendPtr m_backend;
 116             void handle_package(mp::Package &package);
 117             void handle_search(mp::Package &package);
 118             void handle_present(mp::Package &package);
 119             BackendPtr get_backend_from_databases(mp::Package &package,
 120                                                   std::string &database,
 121                                                   int *error,
 122                                                   char **addinfo,
 123                                                   ODR odr);
 124
 125             bool create_content_session(mp::Package &package,
 126                                         BackendPtr b,
 127                                         int *error,
 128                                         char **addinfo,
 129                                         ODR odr,
 130                                         std::string authentication,
 131                                         std::string proxy);
 132
 133             void prepare_elements(BackendPtr b,
 134                                   Odr_oid *preferredRecordSyntax,
 135                                   const char *element_set_name,
 136                                   bool &enable_pz2_retrieval,
 137                                   bool &enable_pz2_transform,
 138                                   bool &assume_marc8_charset);
 139
 140             Z_Records *get_records(Odr_int start,
 141                                    Odr_int number_to_present,
 142                                    int *error,
 143                                    char **addinfo,
 144                                    Odr_int *number_of_records_returned,
 145                                    ODR odr, BackendPtr b,
 146                                    Odr_oid *preferredRecordSyntax,
 147                                    const char *element_set_name);
 148         public:
 149             Frontend(Impl *impl);
 150             ~Frontend();
 151         };
 152         class Zoom::Impl {
 153             friend class Frontend;
 154         public:
 155             Impl();
 156             ~Impl();
 157             void process(metaproxy_1::Package & package);
 158             void configure(const xmlNode * ptr, bool test_only,
 159                            const char *path);
 160         private:
 161             void configure_local_records(const xmlNode * ptr, bool test_only);
 162             FrontendPtr get_frontend(mp::Package &package);
 163             void release_frontend(mp::Package &package);
 164             SearchablePtr parse_torus_record(const xmlNode *ptr);
 165             struct cql_node *convert_cql_fields(struct cql_node *cn, ODR odr);
 166             std::map<mp::Session, FrontendPtr> m_clients;
 167             boost::mutex m_mutex;
 168             boost::condition m_cond_session_ready;
 169             std::string torus_url;
 170             std::string default_realm;
 171             std::map<std::string,std::string> fieldmap;
 172             std::string xsldir;
 173             std::string file_path;
 174             std::string content_proxy_server;
 175             std::string content_tmp_file;
 176             bool apdu_log;
 177             CCL_bibset bibset;
 178             std::string element_transform;
 179             std::string element_raw;
 180             std::string proxy;
 181             std::map<std::string,SearchablePtr> s_map;
 182         };
 183     }
 184 }
 185
 186 // define Pimpl wrapper forwarding to Impl
 187
 188 yf::Zoom::Zoom() : m_p(new Impl)
 189 {
 190 }
 191
 192 yf::Zoom::~Zoom()
 193 {  // must have a destructor because of boost::scoped_ptr
 194 }
 195
 196 void yf::Zoom::configure(const xmlNode *xmlnode, bool test_only,
 197                          const char *path)
 198 {
 199     m_p->configure(xmlnode, test_only, path);
 200 }
 201
 202 void yf::Zoom::process(mp::Package &package) const
 203 {
 204     m_p->process(package);
 205 }
 206
 207
 208 // define Implementation stuff
 209
 210 yf::Zoom::Backend::Backend(SearchablePtr ptr) : sptr(ptr)
 211 {
 212     m_apdu_wrbuf = wrbuf_alloc();
 213     m_connection = ZOOM_connection_create(0);
 214     ZOOM_connection_save_apdu_wrbuf(m_connection, m_apdu_wrbuf);
 215     m_resultset = 0;
 216     xsp = 0;
 217 }
 218
 219 yf::Zoom::Backend::~Backend()
 220 {
 221     if (xsp)
 222         xsltFreeStylesheet(xsp);
 223     ZOOM_connection_destroy(m_connection);
 224     ZOOM_resultset_destroy(m_resultset);
 225 }
 226
 227
 228 void yf::Zoom::Backend::get_zoom_error(int *error, char **addinfo,
 229                                        ODR odr)
 230 {
 231     const char *msg = 0;
 232     const char *zoom_addinfo = 0;
 233     const char *dset = 0;
 234     *error = ZOOM_connection_error_x(m_connection, &msg, &zoom_addinfo, &dset);
 235     if (*error)
 236     {
 237         if (*error >= ZOOM_ERROR_CONNECT)
 238         {
 239             // turn ZOOM diagnostic into a Bib-1 2: with addinfo=zoom err msg
 240             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 241             *addinfo = (char *) odr_malloc(
 242                 odr, 20 + strlen(msg) +
 243                 (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 244             strcpy(*addinfo, msg);
 245             if (zoom_addinfo)
 246             {
 247                 strcat(*addinfo, ": ");
 248                 strcat(*addinfo, zoom_addinfo);
 249             }
 250         }
 251         else
 252         {
 253             if (dset && !strcmp(dset, "info:srw/diagnostic/1"))
 254                 *error = yaz_diag_srw_to_bib1(*error);
 255             *addinfo = (char *) odr_malloc(
 256                 odr, 20 + (zoom_addinfo ? strlen(zoom_addinfo) : 0));
 257             **addinfo = '\0';
 258             if (zoom_addinfo && *zoom_addinfo)
 259             {
 260                 strcpy(*addinfo, zoom_addinfo);
 261                 strcat(*addinfo, " ");
 262             }
 263             strcat(*addinfo, "(backend)");
 264         }
 265     }
 266 }
 267
 268 void yf::Zoom::Backend::connect(std::string zurl,
 269                                 int *error, char **addinfo,
 270                                 ODR odr)
 271 {
 272     ZOOM_connection_connect(m_connection, zurl.c_str(), 0);
 273     get_zoom_error(error, addinfo, odr);
 274 }
 275
 276 void yf::Zoom::Backend::search(ZOOM_query q, Odr_int *hits,
 277                                int *error, char **addinfo, ODR odr)
 278 {
 279     m_resultset = ZOOM_connection_search(m_connection, q);
 280     get_zoom_error(error, addinfo, odr);
 281     if (*error == 0)
 282         *hits = ZOOM_resultset_size(m_resultset);
 283     else
 284         *hits = 0;
 285 }
 286
 287 void yf::Zoom::Backend::present(Odr_int start, Odr_int number,
 288                                 ZOOM_record *recs,
 289                                 int *error, char **addinfo, ODR odr)
 290 {
 291     ZOOM_resultset_records(m_resultset, recs, start, number);
 292     get_zoom_error(error, addinfo, odr);
 293 }
 294
 295 void yf::Zoom::Backend::set_option(const char *name, const char *value)
 296 {
 297     ZOOM_connection_option_set(m_connection, name, value);
 298     if (m_resultset)
 299         ZOOM_resultset_option_set(m_resultset, name, value);
 300 }
 301
 302 void yf::Zoom::Backend::set_option(const char *name, std::string value)
 303 {
 304     set_option(name, value.c_str());
 305 }
 306
 307 const char *yf::Zoom::Backend::get_option(const char *name)
 308 {
 309     return ZOOM_connection_option_get(m_connection, name);
 310 }
 311
 312 yf::Zoom::Searchable::Searchable(CCL_bibset base)
 313 {
 314     piggyback = true;
 315     use_turbomarc = true;
 316     sortStrategy = "embed";
 317     ccl_bibset = ccl_qual_dup(base);
 318 }
 319
 320 yf::Zoom::Searchable::~Searchable()
 321 {
 322     ccl_qual_rm(&ccl_bibset);
 323 }
 324
 325 yf::Zoom::Frontend::Frontend(Impl *impl) :
 326     m_p(impl), m_is_virtual(false), m_in_use(true)
 327 {
 328 }
 329
 330 yf::Zoom::Frontend::~Frontend()
 331 {
 332 }
 333
 334 yf::Zoom::FrontendPtr yf::Zoom::Impl::get_frontend(mp::Package &package)
 335 {
 336     boost::mutex::scoped_lock lock(m_mutex);
 337
 338     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 339
 340     while(true)
 341     {
 342         it = m_clients.find(package.session());
 343         if (it == m_clients.end())
 344             break;
 345
 346         if (!it->second->m_in_use)
 347         {
 348             it->second->m_in_use = true;
 349             return it->second;
 350         }
 351         m_cond_session_ready.wait(lock);
 352     }
 353     FrontendPtr f(new Frontend(this));
 354     m_clients[package.session()] = f;
 355     f->m_in_use = true;
 356     return f;
 357 }
 358
 359 void yf::Zoom::Impl::release_frontend(mp::Package &package)
 360 {
 361     boost::mutex::scoped_lock lock(m_mutex);
 362     std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
 363
 364     it = m_clients.find(package.session());
 365     if (it != m_clients.end())
 366     {
 367         if (package.session().is_closed())
 368         {
 369             m_clients.erase(it);
 370         }
 371         else
 372         {
 373             it->second->m_in_use = false;
 374         }
 375         m_cond_session_ready.notify_all();
 376     }
 377 }
 378
 379 yf::Zoom::Impl::Impl() :
 380     apdu_log(false), element_transform("pz2") , element_raw("raw")
 381 {
 382     bibset = ccl_qual_mk();
 383
 384     srand((unsigned int) time(0));
 385 }
 386
 387 yf::Zoom::Impl::~Impl()
 388 {
 389     ccl_qual_rm(&bibset);
 390 }
 391
 392 yf::Zoom::SearchablePtr yf::Zoom::Impl::parse_torus_record(const xmlNode *ptr)
 393 {
 394     Zoom::SearchablePtr s(new Searchable(bibset));
 395
 396     for (ptr = ptr->children; ptr; ptr = ptr->next)
 397     {
 398         if (ptr->type != XML_ELEMENT_NODE)
 399             continue;
 400         if (!strcmp((const char *) ptr->name, "layer"))
 401             ptr = ptr->children;
 402         else if (!strcmp((const char *) ptr->name,
 403                          "authentication"))
 404         {
 405             s->authentication = mp::xml::get_text(ptr);
 406         }
 407         else if (!strcmp((const char *) ptr->name,
 408                          "cfAuth"))
 409         {
 410             s->cfAuth = mp::xml::get_text(ptr);
 411         }
 412         else if (!strcmp((const char *) ptr->name,
 413                          "cfProxy"))
 414         {
 415             s->cfProxy = mp::xml::get_text(ptr);
 416         }
 417         else if (!strcmp((const char *) ptr->name,
 418                          "cfSubDB"))
 419         {
 420             s->cfSubDB = mp::xml::get_text(ptr);
 421         }
 422         else if (!strcmp((const char *) ptr->name,
 423                          "contentConnector"))
 424         {
 425             s->contentConnector = mp::xml::get_text(ptr);
 426         }
 427         else if (!strcmp((const char *) ptr->name, "udb"))
 428         {
 429             s->udb = mp::xml::get_text(ptr);
 430         }
 431         else if (!strcmp((const char *) ptr->name, "zurl"))
 432         {
 433             s->target = mp::xml::get_text(ptr);
 434         }
 435         else if (!strcmp((const char *) ptr->name, "sru"))
 436         {
 437             s->sru = mp::xml::get_text(ptr);
 438         }
 439         else if (!strcmp((const char *) ptr->name, "SRUVersion"))
 440         {
 441             s->sru_version = mp::xml::get_text(ptr);
 442         }
 443         else if (!strcmp((const char *) ptr->name,
 444                          "queryEncoding"))
 445         {
 446             s->query_encoding = mp::xml::get_text(ptr);
 447         }
 448         else if (!strcmp((const char *) ptr->name,
 449                          "piggyback"))
 450         {
 451             s->piggyback = mp::xml::get_bool(ptr, true);
 452         }
 453         else if (!strcmp((const char *) ptr->name,
 454                          "requestSyntax"))
 455         {
 456             s->request_syntax = mp::xml::get_text(ptr);
 457         }
 458         else if (!strcmp((const char *) ptr->name,
 459                          "elementSet"))
 460         {
 461             s->element_set = mp::xml::get_text(ptr);
 462         }
 463         else if (!strcmp((const char *) ptr->name,
 464                          "recordEncoding"))
 465         {
 466             s->record_encoding = mp::xml::get_text(ptr);
 467         }
 468         else if (!strcmp((const char *) ptr->name,
 469                          "transform"))
 470         {
 471             s->transform_xsl_fname = mp::xml::get_text(ptr);
 472         }
 473         else if (!strcmp((const char *) ptr->name,
 474                          "literalTransform"))
 475         {
 476             s->transform_xsl_content = mp::xml::get_text(ptr);
 477         }
 478         else if (!strcmp((const char *) ptr->name,
 479                          "urlRecipe"))
 480         {
 481             s->urlRecipe = mp::xml::get_text(ptr);
 482         }
 483         else if (!strcmp((const char *) ptr->name,
 484                          "useTurboMarc"))
 485         {
 486             ; // useTurboMarc is ignored
 487         }
 488         else if (!strncmp((const char *) ptr->name,
 489                           "cclmap_", 7))
 490         {
 491             std::string value = mp::xml::get_text(ptr);
 492             ccl_qual_fitem(s->ccl_bibset, value.c_str(),
 493                            (const char *) ptr->name + 7);
 494         }
 495         else if (!strncmp((const char *) ptr->name,
 496                           "sortmap_", 8))
 497         {
 498             std::string value = mp::xml::get_text(ptr);
 499             s->sortmap[(const char *) ptr->name + 8] = value;
 500         }
 501         else if (!strcmp((const char *) ptr->name,
 502                           "sortStrategy"))
 503         {
 504             s->sortStrategy = mp::xml::get_text(ptr);
 505         }
 506     }
 507     return s;
 508 }
 509
 510 void yf::Zoom::Impl::configure_local_records(const xmlNode *ptr, bool test_only)
 511 {
 512     while (ptr && ptr->type != XML_ELEMENT_NODE)
 513         ptr = ptr->next;
 514
 515     if (ptr)
 516     {
 517         if (!strcmp((const char *) ptr->name, "records"))
 518         {
 519             for (ptr = ptr->children; ptr; ptr = ptr->next)
 520             {
 521                 if (ptr->type != XML_ELEMENT_NODE)
 522                     continue;
 523                 if (!strcmp((const char *) ptr->name, "record"))
 524                 {
 525                     SearchablePtr s = parse_torus_record(ptr);
 526                     if (s)
 527                     {
 528                         std::string udb = s->udb;
 529                         if (udb.length())
 530                             s_map[s->udb] = s;
 531                         else
 532                         {
 533                             throw mp::filter::FilterException
 534                                 ("No udb for local torus record");
 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 "
 544                          "<torus><records>");
 545                 }
 546             }
 547         }
 548         else
 549         {
 550             throw mp::filter::FilterException
 551                 ("Bad element "
 552                  + std::string((const char *) ptr->name)
 553                  + " in zoom filter inside element <torus>");
 554         }
 555     }
 556 }
 557
 558 void yf::Zoom::Impl::configure(const xmlNode *ptr, bool test_only,
 559                                const char *path)
 560 {
 561     content_tmp_file = "/tmp/cf.XXXXXX.p";
 562     if (path && *path)
 563     {
 564         file_path = path;
 565     }
 566     for (ptr = ptr->children; ptr; ptr = ptr->next)
 567     {
 568         if (ptr->type != XML_ELEMENT_NODE)
 569             continue;
 570         else if (!strcmp((const char *) ptr->name, "torus"))
 571         {
 572             const struct _xmlAttr *attr;
 573             for (attr = ptr->properties; attr; attr = attr->next)
 574             {
 575                 if (!strcmp((const char *) attr->name, "url"))
 576                     torus_url = mp::xml::get_text(attr->children);
 577                 else if (!strcmp((const char *) attr->name, "realm"))
 578                     default_realm = mp::xml::get_text(attr->children);
 579                 else if (!strcmp((const char *) attr->name, "xsldir"))
 580                     xsldir = mp::xml::get_text(attr->children);
 581                 else if (!strcmp((const char *) attr->name, "element_transform"))
 582                     element_transform = mp::xml::get_text(attr->children);
 583                 else if (!strcmp((const char *) attr->name, "element_raw"))
 584                     element_raw = mp::xml::get_text(attr->children);
 585                 else if (!strcmp((const char *) attr->name, "proxy"))
 586                     proxy = mp::xml::get_text(attr->children);
 587                 else
 588                     throw mp::filter::FilterException(
 589                         "Bad attribute " + std::string((const char *)
 590                                                        attr->name));
 591             }
 592             configure_local_records(ptr->children, test_only);
 593         }
 594         else if (!strcmp((const char *) ptr->name, "cclmap"))
 595         {
 596             const char *addinfo = 0;
 597             ccl_xml_config(bibset, ptr, &addinfo);
 598         }
 599         else if (!strcmp((const char *) ptr->name, "fieldmap"))
 600         {
 601             const struct _xmlAttr *attr;
 602             std::string ccl_field;
 603             std::string cql_field;
 604             for (attr = ptr->properties; attr; attr = attr->next)
 605             {
 606                 if (!strcmp((const char *) attr->name, "ccl"))
 607                     ccl_field = mp::xml::get_text(attr->children);
 608                 else if (!strcmp((const char *) attr->name, "cql"))
 609                     cql_field = mp::xml::get_text(attr->children);
 610                 else
 611                     throw mp::filter::FilterException(
 612                         "Bad attribute " + std::string((const char *)
 613                                                        attr->name));
 614             }
 615             if (cql_field.length())
 616                 fieldmap[cql_field] = ccl_field;
 617         }
 618         else if (!strcmp((const char *) ptr->name, "contentProxy"))
 619         {
 620             const struct _xmlAttr *attr;
 621             for (attr = ptr->properties; attr; attr = attr->next)
 622             {
 623                 if (!strcmp((const char *) attr->name, "server"))
 624                     content_proxy_server = mp::xml::get_text(attr->children);
 625                 else if (!strcmp((const char *) attr->name, "tmp_file"))
 626                     content_tmp_file = mp::xml::get_text(attr->children);
 627                 else
 628                     throw mp::filter::FilterException(
 629                         "Bad attribute " + std::string((const char *)
 630                                                        attr->name));
 631             }
 632         }
 633         else if (!strcmp((const char *) ptr->name, "log"))
 634         {
 635             const struct _xmlAttr *attr;
 636             for (attr = ptr->properties; attr; attr = attr->next)
 637             {
 638                 if (!strcmp((const char *) attr->name, "apdu"))
 639                     apdu_log = mp::xml::get_bool(attr->children, false);
 640                 else
 641                     throw mp::filter::FilterException(
 642                         "Bad attribute " + std::string((const char *)
 643                                                        attr->name));
 644             }
 645         }
 646         else
 647         {
 648             throw mp::filter::FilterException
 649                 ("Bad element "
 650                  + std::string((const char *) ptr->name)
 651                  + " in zoom filter");
 652         }
 653     }
 654 }
 655
 656 bool yf::Zoom::Frontend::create_content_session(mp::Package &package,
 657                                                 BackendPtr b,
 658                                                 int *error, char **addinfo,
 659                                                 ODR odr,
 660                                                 std::string authentication,
 661                                                 std::string proxy)
 662 {
 663     if (b->sptr->contentConnector.length())
 664     {
 665         char *fname = (char *) xmalloc(m_p->content_tmp_file.length() + 8);
 666         strcpy(fname, m_p->content_tmp_file.c_str());
 667         char *xx = strstr(fname, "XXXXXX");
 668         if (!xx)
 669         {
 670             xx = fname + strlen(fname);
 671             strcat(fname, "XXXXXX");
 672         }
 673         char tmp_char = xx[6];
 674         sprintf(xx, "%06d", ((unsigned) rand()) % 1000000);
 675         xx[6] = tmp_char;
 676
 677         FILE *file = fopen(fname, "w");
 678         if (!file)
 679         {
 680             package.log("zoom", YLOG_WARN|YLOG_ERRNO, "create %s", fname);
 681             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 682             *addinfo = (char *)  odr_malloc(odr, 40 + strlen(fname));
 683             sprintf(*addinfo, "Could not create %s", fname);
 684             xfree(fname);
 685             return false;
 686         }
 687         b->content_session_id.assign(xx, 6);
 688         WRBUF w = wrbuf_alloc();
 689         wrbuf_puts(w, "#content_proxy\n");
 690         wrbuf_printf(w, "connector: %s\n", b->sptr->contentConnector.c_str());
 691         if (authentication.length())
 692             wrbuf_printf(w, "auth: %s\n", authentication.c_str());
 693         if (proxy.length())
 694             wrbuf_printf(w, "proxy: %s\n", proxy.c_str());
 695
 696         fwrite(wrbuf_buf(w), 1, wrbuf_len(w), file);
 697         fclose(file);
 698         package.log("zoom", YLOG_LOG, "content file: %s", fname);
 699         xfree(fname);
 700     }
 701     return true;
 702 }
 703
 704 yf::Zoom::BackendPtr yf::Zoom::Frontend::get_backend_from_databases(
 705     mp::Package &package,
 706     std::string &database, int *error, char **addinfo, ODR odr)
 707 {
 708     std::list<BackendPtr>::const_iterator map_it;
 709     if (m_backend && m_backend->m_frontend_database == database)
 710         return m_backend;
 711
 712     std::string input_args;
 713     std::string torus_db;
 714     size_t db_arg_pos = database.find(',');
 715     if (db_arg_pos != std::string::npos)
 716     {
 717         torus_db = database.substr(0, db_arg_pos);
 718         input_args = database.substr(db_arg_pos + 1);
 719     }
 720     else
 721         torus_db = database;
 722
 723     std::string authentication;
 724     std::string proxy;
 725     std::string realm = m_p->default_realm;
 726
 727     const char *param_user = 0;
 728     const char *param_password = 0;
 729     int no_parms = 0;
 730
 731     char **names;
 732     char **values;
 733     int no_out_args = 0;
 734     if (input_args.length())
 735         no_parms = yaz_uri_to_array(input_args.c_str(),
 736                                     odr, &names, &values);
 737     // adding 10 because we'll be adding other URL args
 738     const char **out_names = (const char **)
 739         odr_malloc(odr, (10 + no_parms) * sizeof(*out_names));
 740     const char **out_values = (const char **)
 741         odr_malloc(odr, (10 + no_parms) * sizeof(*out_values));
 742
 743     int i;
 744     for (i = 0; i < no_parms; i++)
 745     {
 746         const char *name = names[i];
 747         const char *value = values[i];
 748         assert(name);
 749         assert(value);
 750         if (!strcmp(name, "user"))
 751             param_user = value;
 752         else if (!strcmp(name, "password"))
 753             param_password = value;
 754         else if (!strcmp(name, "proxy"))
 755             proxy = value;
 756         else if (!strcmp(name, "cproxysession"))
 757         {
 758             out_names[no_out_args] = name;
 759             out_values[no_out_args++] = value;
 760         }
 761         else if (!strcmp(name, "realm"))
 762             realm = value;
 763         else if (name[0] == 'x' && name[1] == '-')
 764         {
 765             out_names[no_out_args] = name;
 766             out_values[no_out_args++] = value;
 767         }
 768         else
 769         {
 770             BackendPtr notfound;
 771             char *msg = (char*) odr_malloc(odr, strlen(name) + 30);
 772             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 773             sprintf(msg, "Bad database argument: %s", name);
 774             *addinfo = msg;
 775             return notfound;
 776         }
 777     }
 778     if (param_user)
 779     {
 780         authentication = std::string(param_user);
 781         if (param_password)
 782             authentication += "/" + std::string(param_password);
 783     }
 784     SearchablePtr sptr;
 785
 786     std::map<std::string,SearchablePtr>::iterator it;
 787     it = m_p->s_map.find(torus_db);
 788     if (it != m_p->s_map.end())
 789         sptr = it->second;
 790     else if (m_p->torus_url.length() > 0)
 791     {
 792         xmlDoc *doc = mp::get_searchable(m_p->torus_url, torus_db, realm,
 793                                          m_p->proxy);
 794         if (!doc)
 795         {
 796             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 797             *addinfo = odr_strdup(odr, database.c_str());
 798             BackendPtr b;
 799             return b;
 800         }
 801         const xmlNode *ptr = xmlDocGetRootElement(doc);
 802         if (ptr)
 803         {   // presumably ptr is a records element node
 804             // parse first record in document
 805             for (ptr = ptr->children; ptr; ptr = ptr->next)
 806             {
 807                 if (ptr->type == XML_ELEMENT_NODE
 808                     && !strcmp((const char *) ptr->name, "record"))
 809                 {
 810                     if (sptr)
 811                     {
 812                         *error = YAZ_BIB1_UNSPECIFIED_ERROR;
 813                         *addinfo = (char*) odr_malloc(odr, 40 + database.length()),
 814                         sprintf(*addinfo, "multiple records for udb=%s",
 815                                  database.c_str());
 816                         xmlFreeDoc(doc);
 817                         BackendPtr b;
 818                         return b;
 819                     }
 820                     sptr = m_p->parse_torus_record(ptr);
 821                 }
 822             }
 823         }
 824         xmlFreeDoc(doc);
 825     }
 826
 827     if (!sptr)
 828     {
 829         *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 830         *addinfo = odr_strdup(odr, database.c_str());
 831         BackendPtr b;
 832         return b;
 833     }
 834
 835     xsltStylesheetPtr xsp = 0;
 836     if (sptr->transform_xsl_content.length())
 837     {
 838         xmlDoc *xsp_doc = xmlParseMemory(sptr->transform_xsl_content.c_str(),
 839                                          sptr->transform_xsl_content.length());
 840         if (!xsp_doc)
 841         {
 842             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 843             *addinfo = (char *) odr_malloc(odr, 40);
 844             sprintf(*addinfo, "xmlParseMemory failed");
 845             BackendPtr b;
 846             return b;
 847         }
 848         xsp = xsltParseStylesheetDoc(xsp_doc);
 849         if (!xsp)
 850         {
 851             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 852             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 853             BackendPtr b;
 854             xmlFreeDoc(xsp_doc);
 855             return b;
 856         }
 857     }
 858     else if (sptr->transform_xsl_fname.length())
 859     {
 860         const char *path = 0;
 861
 862         if (m_p->xsldir.length())
 863             path = m_p->xsldir.c_str();
 864         else
 865             path = m_p->file_path.c_str();
 866         std::string fname;
 867
 868         char fullpath[1024];
 869         char *cp = yaz_filepath_resolve(sptr->transform_xsl_fname.c_str(),
 870                                         path, 0, fullpath);
 871         if (cp)
 872             fname.assign(cp);
 873         else
 874         {
 875             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 876             *addinfo = (char *)
 877                 odr_malloc(odr, 40 + sptr->transform_xsl_fname.length());
 878             sprintf(*addinfo, "File could not be read: %s",
 879                     sptr->transform_xsl_fname.c_str());
 880             BackendPtr b;
 881             return b;
 882         }
 883         xmlDoc *xsp_doc = xmlParseFile(fname.c_str());
 884         if (!xsp_doc)
 885         {
 886             *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
 887             *addinfo = (char *) odr_malloc(odr, 40 + fname.length());
 888             sprintf(*addinfo, "xmlParseFile failed. File: %s", fname.c_str());
 889             BackendPtr b;
 890             return b;
 891         }
 892         xsp = xsltParseStylesheetDoc(xsp_doc);
 893         if (!xsp)
 894         {
 895             *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
 896             *addinfo = odr_strdup(odr, "xsltParseStylesheetDoc failed");
 897             BackendPtr b;
 898             xmlFreeDoc(xsp_doc);
 899             return b;
 900         }
 901     }
 902
 903     m_backend.reset();
 904
 905     BackendPtr b(new Backend(sptr));
 906
 907     b->xsp = xsp;
 908     b->m_frontend_database = database;
 909
 910     if (sptr->query_encoding.length())
 911         b->set_option("rpnCharset", sptr->query_encoding);
 912
 913     b->set_option("timeout", "40");
 914
 915     if (m_p->apdu_log)
 916         b->set_option("apdulog", "1");
 917
 918     if (sptr->piggyback)
 919         b->set_option("count", "1"); /* some SRU servers INSIST on getting
 920                                         maximumRecords > 0 */
 921     b->set_option("piggyback", sptr->piggyback ? "1" : "0");
 922
 923     if (authentication.length() == 0)
 924         authentication = sptr->authentication;
 925
 926     if (proxy.length() == 0)
 927         proxy = sptr->cfProxy;
 928
 929     if (sptr->cfAuth.length())
 930     {
 931         // A CF target
 932         b->set_option("user", sptr->cfAuth);
 933         if (authentication.length())
 934         {
 935             size_t found = authentication.find('/');
 936             if (found != std::string::npos)
 937             {
 938                 out_names[no_out_args] = "user";
 939                 out_values[no_out_args++] =
 940                     odr_strdup(odr, authentication.substr(0, found).c_str());
 941
 942                 out_names[no_out_args] = "password";
 943                 out_values[no_out_args++] =
 944                     odr_strdup(odr, authentication.substr(found+1).c_str());
 945             }
 946             else
 947             {
 948                 out_names[no_out_args] = "user";
 949                 out_values[no_out_args++] =
 950                     odr_strdup(odr, authentication.c_str());
 951             }
 952         }
 953         if (proxy.length())
 954         {
 955             out_names[no_out_args] = "proxy";
 956             out_values[no_out_args++] = odr_strdup(odr, proxy.c_str());
 957         }
 958         if (sptr->cfSubDB.length())
 959         {
 960             out_names[no_out_args] = "subdatabase";
 961             out_values[no_out_args++] = odr_strdup(odr, sptr->cfSubDB.c_str());
 962         }
 963     }
 964     else
 965     {
 966         size_t found = authentication.find('/');
 967
 968         if (sptr->sru.length() && found != std::string::npos)
 969         {
 970             b->set_option("user", authentication.substr(0, found));
 971             b->set_option("password", authentication.substr(found+1));
 972         }
 973         else
 974             b->set_option("user", authentication);
 975
 976         if (proxy.length())
 977             b->set_option("proxy", proxy);
 978     }
 979     std::string url;
 980     if (sptr->sru.length())
 981     {
 982         url = "http://" + sptr->target;
 983         b->set_option("sru", sptr->sru);
 984
 985         if (sptr->sru_version.length())
 986             b->set_option("sru_version", sptr->sru_version);
 987     }
 988     else
 989     {
 990         url = sptr->target;
 991     }
 992     if (no_out_args)
 993     {
 994         char *x_args = 0;
 995         out_names[no_out_args] = 0; // terminate list
 996
 997         yaz_array_to_uri(&x_args, odr, (char **) out_names,
 998                          (char **) out_values);
 999         url += "," + std::string(x_args);
1000     }
1001     package.log("zoom", YLOG_LOG, "url: %s", url.c_str());
1002     b->connect(url, error, addinfo, odr);
1003     if (*error == 0)
1004         create_content_session(package, b, error, addinfo, odr,
1005                                authentication, proxy);
1006     if (*error == 0)
1007         m_backend = b;
1008     return b;
1009 }
1010
1011 void yf::Zoom::Frontend::prepare_elements(BackendPtr b,
1012                                           Odr_oid *preferredRecordSyntax,
1013                                           const char *element_set_name,
1014                                           bool &enable_pz2_retrieval,
1015                                           bool &enable_pz2_transform,
1016                                           bool &assume_marc8_charset)
1017
1018 {
1019     char oid_name_str[OID_STR_MAX];
1020     const char *syntax_name = 0;
1021
1022     if (preferredRecordSyntax &&
1023         !oid_oidcmp(preferredRecordSyntax, yaz_oid_recsyn_xml)
1024         && element_set_name)
1025     {
1026         if (!strcmp(element_set_name, m_p->element_transform.c_str()))
1027         {
1028             enable_pz2_retrieval = true;
1029             enable_pz2_transform = true;
1030         }
1031         else if (!strcmp(element_set_name, m_p->element_raw.c_str()))
1032         {
1033             enable_pz2_retrieval = true;
1034         }
1035     }
1036
1037     if (enable_pz2_retrieval)
1038     {
1039         std::string configured_request_syntax = b->sptr->request_syntax;
1040         if (configured_request_syntax.length())
1041         {
1042             syntax_name = configured_request_syntax.c_str();
1043             const Odr_oid *syntax_oid =
1044                 yaz_string_to_oid(yaz_oid_std(), CLASS_RECSYN, syntax_name);
1045             if (!oid_oidcmp(syntax_oid, yaz_oid_recsyn_usmarc)
1046                 || !oid_oidcmp(syntax_oid, yaz_oid_recsyn_opac))
1047                 assume_marc8_charset = true;
1048         }
1049     }
1050     else if (preferredRecordSyntax)
1051         syntax_name =
1052             yaz_oid_to_string_buf(preferredRecordSyntax, 0, oid_name_str);
1053
1054     if (b->sptr->sru.length())
1055         syntax_name = "XML";
1056
1057     b->set_option("preferredRecordSyntax", syntax_name);
1058
1059     if (enable_pz2_retrieval)
1060     {
1061         element_set_name = 0;
1062         if (b->sptr->element_set.length())
1063             element_set_name = b->sptr->element_set.c_str();
1064     }
1065
1066     b->set_option("elementSetName", element_set_name);
1067     if (b->sptr->sru.length() && element_set_name)
1068         b->set_option("schema", element_set_name);
1069 }
1070
1071 Z_Records *yf::Zoom::Frontend::get_records(Odr_int start,
1072                                            Odr_int number_to_present,
1073                                            int *error,
1074                                            char **addinfo,
1075                                            Odr_int *number_of_records_returned,
1076                                            ODR odr,
1077                                            BackendPtr b,
1078                                            Odr_oid *preferredRecordSyntax,
1079                                            const char *element_set_name)
1080 {
1081     *number_of_records_returned = 0;
1082     Z_Records *records = 0;
1083     bool enable_pz2_retrieval = false; // whether target profile is used
1084     bool enable_pz2_transform = false; // whether XSLT is used as well
1085     bool assume_marc8_charset = false;
1086
1087     prepare_elements(b, preferredRecordSyntax,
1088                      element_set_name,
1089                      enable_pz2_retrieval,
1090                      enable_pz2_transform,
1091                      assume_marc8_charset);
1092
1093     if (start < 0 || number_to_present <=0)
1094         return records;
1095
1096     if (number_to_present > 10000)
1097         number_to_present = 10000;
1098
1099     ZOOM_record *recs = (ZOOM_record *)
1100         odr_malloc(odr, (size_t) number_to_present * sizeof(*recs));
1101
1102     b->present(start, number_to_present, recs, error, addinfo, odr);
1103
1104     int i = 0;
1105     if (!*error)
1106     {
1107         for (i = 0; i < number_to_present; i++)
1108             if (!recs[i])
1109                 break;
1110     }
1111     if (i > 0)
1112     {  // only return records if no error and at least one record
1113         char *odr_database = odr_strdup(odr,
1114                                         b->m_frontend_database.c_str());
1115         Z_NamePlusRecordList *npl = (Z_NamePlusRecordList *)
1116             odr_malloc(odr, sizeof(*npl));
1117         *number_of_records_returned = i;
1118         npl->num_records = i;
1119         npl->records = (Z_NamePlusRecord **)
1120             odr_malloc(odr, i * sizeof(*npl->records));
1121         for (i = 0; i < number_to_present; i++)
1122         {
1123             Z_NamePlusRecord *npr = 0;
1124             const char *addinfo;
1125             int sur_error = ZOOM_record_error(recs[i], 0 /* msg */,
1126                                               &addinfo, 0 /* diagset */);
1127
1128             if (sur_error)
1129             {
1130                 npr = zget_surrogateDiagRec(odr, odr_database, sur_error,
1131                                             addinfo);
1132             }
1133             else if (enable_pz2_retrieval)
1134             {
1135                 char rec_type_str[100];
1136                 const char *record_encoding = 0;
1137
1138                 if (b->sptr->record_encoding.length())
1139                     record_encoding = b->sptr->record_encoding.c_str();
1140                 else if (assume_marc8_charset)
1141                     record_encoding = "marc8";
1142
1143                 strcpy(rec_type_str, b->sptr->use_turbomarc ? "txml" : "xml");
1144                 if (record_encoding)
1145                 {
1146                     strcat(rec_type_str, "; charset=");
1147                     strcat(rec_type_str, record_encoding);
1148                 }
1149
1150                 int rec_len;
1151                 xmlChar *xmlrec_buf = 0;
1152                 const char *rec_buf = ZOOM_record_get(recs[i], rec_type_str,
1153                                                       &rec_len);
1154                 if (!rec_buf && !npr)
1155                 {
1156                     std::string addinfo("ZOOM_record_get failed for type ");
1157
1158                     addinfo += rec_type_str;
1159                     npr = zget_surrogateDiagRec(
1160                         odr, odr_database,
1161                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1162                         addinfo.c_str());
1163                 }
1164
1165                 if (rec_buf && b->xsp && enable_pz2_transform)
1166                 {
1167                     xmlDoc *rec_doc = xmlParseMemory(rec_buf, rec_len);
1168                     if (!rec_doc)
1169                     {
1170                         npr = zget_surrogateDiagRec(
1171                             odr, odr_database,
1172                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1173                             "xml parse failed for record");
1174                     }
1175                     else
1176                     {
1177                         xmlDoc *rec_res =
1178                             xsltApplyStylesheet(b->xsp, rec_doc, 0);
1179
1180                         if (rec_res)
1181                         {
1182                             xsltSaveResultToString(&xmlrec_buf, &rec_len,
1183                                                    rec_res, b->xsp);
1184                             rec_buf = (const char *) xmlrec_buf;
1185
1186                             xmlFreeDoc(rec_res);
1187                         }
1188                         if (!rec_buf)
1189                         {
1190                             std::string addinfo;
1191
1192                             addinfo = "xslt apply failed for "
1193                                 + b->sptr->transform_xsl_fname;
1194                             npr = zget_surrogateDiagRec(
1195                                 odr, odr_database,
1196                                 YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1197                                 addinfo.c_str());
1198                         }
1199                         xmlFreeDoc(rec_doc);
1200                     }
1201                 }
1202
1203                 if (rec_buf)
1204                 {
1205                     xmlDoc *doc = xmlParseMemory(rec_buf, rec_len);
1206                     std::string res =
1207                         mp::xml::url_recipe_handle(doc, b->sptr->urlRecipe);
1208                     if (res.length() && b->content_session_id.length())
1209                     {
1210                         size_t off = res.find_first_of("://");
1211                         if (off != std::string::npos)
1212                         {
1213                             char tmp[1024];
1214                             sprintf(tmp, "%s.%s/",
1215                                     b->content_session_id.c_str(),
1216                                     m_p->content_proxy_server.c_str());
1217                             res.insert(off + 3, tmp);
1218                         }
1219                     }
1220                     if (res.length())
1221                     {
1222                         xmlNode *ptr = xmlDocGetRootElement(doc);
1223                         while (ptr && ptr->type != XML_ELEMENT_NODE)
1224                             ptr = ptr->next;
1225                         xmlNode *c =
1226                             xmlNewChild(ptr, 0, BAD_CAST "metadata", 0);
1227                         xmlNewProp(c, BAD_CAST "type", BAD_CAST
1228                                    "generated-url");
1229                         xmlNode * t = xmlNewText(BAD_CAST res.c_str());
1230                         xmlAddChild(c, t);
1231
1232                         if (xmlrec_buf)
1233                             xmlFree(xmlrec_buf);
1234
1235                         xmlDocDumpMemory(doc, &xmlrec_buf, &rec_len);
1236                         rec_buf = (const char *) xmlrec_buf;
1237                     }
1238                     xmlFreeDoc(doc);
1239                 }
1240                 if (!npr)
1241                 {
1242                     if (!rec_buf)
1243                         npr = zget_surrogateDiagRec(
1244                             odr, odr_database,
1245                             YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1246                             rec_type_str);
1247                     else
1248                     {
1249                         npr = (Z_NamePlusRecord *)
1250                             odr_malloc(odr, sizeof(*npr));
1251                         npr->databaseName = odr_database;
1252                         npr->which = Z_NamePlusRecord_databaseRecord;
1253                         npr->u.databaseRecord =
1254                             z_ext_record_xml(odr, rec_buf, rec_len);
1255                     }
1256                 }
1257                 if (xmlrec_buf)
1258                     xmlFree(xmlrec_buf);
1259             }
1260             else
1261             {
1262                 Z_External *ext =
1263                     (Z_External *) ZOOM_record_get(recs[i], "ext", 0);
1264                 if (ext)
1265                 {
1266                     npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
1267                     npr->databaseName = odr_database;
1268                     npr->which = Z_NamePlusRecord_databaseRecord;
1269                     npr->u.databaseRecord = ext;
1270                 }
1271                 else
1272                 {
1273                     npr = zget_surrogateDiagRec(
1274                         odr, odr_database,
1275                         YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
1276                         "ZOOM_record, type ext");
1277                 }
1278             }
1279             npl->records[i] = npr;
1280         }
1281         records = (Z_Records*) odr_malloc(odr, sizeof(*records));
1282         records->which = Z_Records_DBOSD;
1283         records->u.databaseOrSurDiagnostics = npl;
1284     }
1285     return records;
1286 }
1287
1288 struct cql_node *yf::Zoom::Impl::convert_cql_fields(struct cql_node *cn,
1289                                                     ODR odr)
1290 {
1291     struct cql_node *r = 0;
1292     if (!cn)
1293         return 0;
1294     switch (cn->which)
1295     {
1296     case CQL_NODE_ST:
1297         if (cn->u.st.index)
1298         {
1299             std::map<std::string,std::string>::const_iterator it;
1300             it = fieldmap.find(cn->u.st.index);
1301             if (it == fieldmap.end())
1302                 return cn;
1303             if (it->second.length())
1304                 cn->u.st.index = odr_strdup(odr, it->second.c_str());
1305             else
1306                 cn->u.st.index = 0;
1307         }
1308         break;
1309     case CQL_NODE_BOOL:
1310         r = convert_cql_fields(cn->u.boolean.left, odr);
1311         if (!r)
1312             r = convert_cql_fields(cn->u.boolean.right, odr);
1313         break;
1314     case CQL_NODE_SORT:
1315         r = convert_cql_fields(cn->u.sort.search, odr);
1316         break;
1317     }
1318     return r;
1319 }
1320
1321 void yf::Zoom::Frontend::handle_search(mp::Package &package)
1322 {
1323     Z_GDU *gdu = package.request().get();
1324     Z_APDU *apdu_req = gdu->u.z3950;
1325     Z_APDU *apdu_res = 0;
1326     mp::odr odr;
1327     Z_SearchRequest *sr = apdu_req->u.searchRequest;
1328     if (sr->num_databaseNames != 1)
1329     {
1330         apdu_res = odr.create_searchResponse(
1331             apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
1332         package.response() = apdu_res;
1333         return;
1334     }
1335
1336     int error = 0;
1337     char *addinfo = 0;
1338     std::string db(sr->databaseNames[0]);
1339     BackendPtr b = get_backend_from_databases(package, db, &error,
1340                                               &addinfo, odr);
1341     if (error)
1342     {
1343         apdu_res =
1344             odr.create_searchResponse(apdu_req, error, addinfo);
1345         package.response() = apdu_res;
1346         return;
1347     }
1348
1349     b->set_option("setname", "default");
1350
1351     bool enable_pz2_retrieval = false;
1352     bool enable_pz2_transform = false;
1353     bool assume_marc8_charset = false;
1354     prepare_elements(b, sr->preferredRecordSyntax, 0 /*element_set_name */,
1355                      enable_pz2_retrieval,
1356                      enable_pz2_transform,
1357                      assume_marc8_charset);
1358
1359     Odr_int hits = 0;
1360     Z_Query *query = sr->query;
1361     WRBUF ccl_wrbuf = 0;
1362     WRBUF pqf_wrbuf = 0;
1363     std::string sortkeys;
1364
1365     if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
1366     {
1367         // RPN
1368         pqf_wrbuf = wrbuf_alloc();
1369         yaz_rpnquery_to_wrbuf(pqf_wrbuf, query->u.type_1);
1370     }
1371     else if (query->which == Z_Query_type_2)
1372     {
1373         // CCL
1374         ccl_wrbuf = wrbuf_alloc();
1375         wrbuf_write(ccl_wrbuf, (const char *) query->u.type_2->buf,
1376                     query->u.type_2->len);
1377     }
1378     else if (query->which == Z_Query_type_104 &&
1379              query->u.type_104->which == Z_External_CQL)
1380     {
1381         // CQL
1382         const char *cql = query->u.type_104->u.cql;
1383         CQL_parser cp = cql_parser_create();
1384         int r = cql_parser_string(cp, cql);
1385         package.log("zoom", YLOG_LOG, "CQL: %s", cql);
1386         if (r)
1387         {
1388             cql_parser_destroy(cp);
1389             package.log("zoom", YLOG_WARN, "CQL syntax error");
1390             apdu_res =
1391                 odr.create_searchResponse(apdu_req,
1392                                           YAZ_BIB1_MALFORMED_QUERY,
1393                                           "CQL syntax error");
1394             package.response() = apdu_res;
1395             return;
1396         }
1397         struct cql_node *cn = cql_parser_result(cp);
1398         struct cql_node *cn_error = m_p->convert_cql_fields(cn, odr);
1399         if (cn_error)
1400         {
1401             // hopefully we are getting a ptr to a index+relation+term node
1402             addinfo = 0;
1403             if (cn_error->which == CQL_NODE_ST)
1404                 addinfo = cn_error->u.st.index;
1405
1406             apdu_res =
1407                 odr.create_searchResponse(apdu_req,
1408                                           YAZ_BIB1_UNSUPP_USE_ATTRIBUTE,
1409                                           addinfo);
1410             package.response() = apdu_res;
1411             return;
1412         }
1413         char ccl_buf[1024];
1414
1415         r = cql_to_ccl_buf(cn, ccl_buf, sizeof(ccl_buf));
1416         if (r == 0)
1417         {
1418             ccl_wrbuf = wrbuf_alloc();
1419             wrbuf_puts(ccl_wrbuf, ccl_buf);
1420
1421             WRBUF sru_sortkeys_wrbuf = wrbuf_alloc();
1422
1423             cql_sortby_to_sortkeys(cn, wrbuf_vp_puts, sru_sortkeys_wrbuf);
1424             WRBUF sort_spec_wrbuf = wrbuf_alloc();
1425             yaz_srw_sortkeys_to_sort_spec(wrbuf_cstr(sru_sortkeys_wrbuf),
1426                                           sort_spec_wrbuf);
1427             wrbuf_destroy(sru_sortkeys_wrbuf);
1428
1429             yaz_tok_cfg_t tc = yaz_tok_cfg_create();
1430             yaz_tok_parse_t tp =
1431                 yaz_tok_parse_buf(tc, wrbuf_cstr(sort_spec_wrbuf));
1432             yaz_tok_cfg_destroy(tc);
1433
1434             /* go through sortspec and map fields */
1435             int token = yaz_tok_move(tp);
1436             while (token != YAZ_TOK_EOF)
1437             {
1438                 if (token == YAZ_TOK_STRING)
1439                 {
1440                     const char *field = yaz_tok_parse_string(tp);
1441                     std::map<std::string,std::string>::iterator it;
1442                     it = b->sptr->sortmap.find(field);
1443                     if (it != b->sptr->sortmap.end())
1444                         sortkeys += it->second;
1445                     else
1446                         sortkeys += field;
1447                 }
1448                 sortkeys += " ";
1449                 token = yaz_tok_move(tp);
1450                 if (token == YAZ_TOK_STRING)
1451                 {
1452                     sortkeys += yaz_tok_parse_string(tp);
1453                 }
1454                 if (token != YAZ_TOK_EOF)
1455                 {
1456                     sortkeys += " ";
1457                     token = yaz_tok_move(tp);
1458                 }
1459             }
1460             yaz_tok_parse_destroy(tp);
1461             wrbuf_destroy(sort_spec_wrbuf);
1462         }
1463         cql_parser_destroy(cp);
1464         if (r)
1465         {
1466             apdu_res =
1467                 odr.create_searchResponse(apdu_req,
1468                                           YAZ_BIB1_MALFORMED_QUERY,
1469                                           "CQL to CCL conversion error");
1470             package.response() = apdu_res;
1471             return;
1472         }
1473     }
1474     else
1475     {
1476         apdu_res =
1477             odr.create_searchResponse(apdu_req, YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
1478         package.response() = apdu_res;
1479         return;
1480     }
1481
1482     if (ccl_wrbuf)
1483     {
1484         // CCL to PQF
1485         assert(pqf_wrbuf == 0);
1486         int cerror, cpos;
1487         struct ccl_rpn_node *cn;
1488         package.log("zoom", YLOG_LOG, "CCL: %s", wrbuf_cstr(ccl_wrbuf));
1489         cn = ccl_find_str(b->sptr->ccl_bibset, wrbuf_cstr(ccl_wrbuf),
1490                           &cerror, &cpos);
1491         wrbuf_destroy(ccl_wrbuf);
1492         if (!cn)
1493         {
1494             char *addinfo = odr_strdup(odr, ccl_err_msg(cerror));
1495             int z3950_diag = YAZ_BIB1_MALFORMED_QUERY;
1496
1497             switch (cerror)
1498             {
1499             case CCL_ERR_UNKNOWN_QUAL:
1500                 z3950_diag = YAZ_BIB1_UNSUPP_USE_ATTRIBUTE;
1501                 break;
1502             case CCL_ERR_TRUNC_NOT_LEFT:
1503             case CCL_ERR_TRUNC_NOT_RIGHT:
1504             case CCL_ERR_TRUNC_NOT_BOTH:
1505                 z3950_diag = YAZ_BIB1_UNSUPP_TRUNCATION_ATTRIBUTE;
1506                 break;
1507             }
1508             apdu_res =
1509                 odr.create_searchResponse(apdu_req, z3950_diag, addinfo);
1510             package.response() = apdu_res;
1511             return;
1512         }
1513         pqf_wrbuf = wrbuf_alloc();
1514         ccl_pquery(pqf_wrbuf, cn);
1515         package.log("zoom", YLOG_LOG, "RPN: %s", wrbuf_cstr(pqf_wrbuf));
1516         ccl_rpn_delete(cn);
1517     }
1518
1519     assert(pqf_wrbuf);
1520
1521     ZOOM_query q = ZOOM_query_create();
1522     ZOOM_query_sortby2(q, b->sptr->sortStrategy.c_str(), sortkeys.c_str());
1523
1524     if (b->get_option("sru"))
1525     {
1526         int status = 0;
1527         Z_RPNQuery *zquery;
1528         zquery = p_query_rpn(odr, wrbuf_cstr(pqf_wrbuf));
1529         WRBUF wrb = wrbuf_alloc();
1530
1531         if (!strcmp(b->get_option("sru"), "solr"))
1532         {
1533             solr_transform_t cqlt = solr_transform_create();
1534
1535             status = solr_transform_rpn2solr_wrbuf(cqlt, wrb, zquery);
1536
1537             solr_transform_close(cqlt);
1538         }
1539         else
1540         {
1541             cql_transform_t cqlt = cql_transform_create();
1542
1543             status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery);
1544
1545             cql_transform_close(cqlt);
1546         }
1547         if (status == 0)
1548         {
1549             ZOOM_query_cql(q, wrbuf_cstr(wrb));
1550             package.log("zoom", YLOG_LOG, "CQL: %s", wrbuf_cstr(wrb));
1551             b->search(q, &hits, &error, &addinfo, odr);
1552         }
1553         ZOOM_query_destroy(q);
1554
1555         wrbuf_destroy(wrb);
1556         wrbuf_destroy(pqf_wrbuf);
1557         if (status)
1558         {
1559             apdu_res =
1560                 odr.create_searchResponse(apdu_req, YAZ_BIB1_MALFORMED_QUERY,
1561                                           "can not convert from RPN to CQL/SOLR");
1562             package.response() = apdu_res;
1563             return;
1564         }
1565     }
1566     else
1567     {
1568         ZOOM_query_prefix(q, wrbuf_cstr(pqf_wrbuf));
1569         package.log("zoom", YLOG_LOG, "search PQF: %s", wrbuf_cstr(pqf_wrbuf));
1570         b->search(q, &hits, &error, &addinfo, odr);
1571         ZOOM_query_destroy(q);
1572         wrbuf_destroy(pqf_wrbuf);
1573     }
1574
1575     const char *element_set_name = 0;
1576     Odr_int number_to_present = 0;
1577     if (!error)
1578         mp::util::piggyback_sr(sr, hits, number_to_present, &element_set_name);
1579
1580     Odr_int number_of_records_returned = 0;
1581     Z_Records *records = get_records(
1582         0, number_to_present, &error, &addinfo,
1583         &number_of_records_returned, odr, b, sr->preferredRecordSyntax,
1584         element_set_name);
1585     apdu_res = odr.create_searchResponse(apdu_req, error, addinfo);
1586     if (records)
1587     {
1588         apdu_res->u.searchResponse->records = records;
1589         apdu_res->u.searchResponse->numberOfRecordsReturned =
1590             odr_intdup(odr, number_of_records_returned);
1591     }
1592     apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
1593     package.response() = apdu_res;
1594 }
1595
1596 void yf::Zoom::Frontend::handle_present(mp::Package &package)
1597 {
1598     Z_GDU *gdu = package.request().get();
1599     Z_APDU *apdu_req = gdu->u.z3950;
1600     Z_APDU *apdu_res = 0;
1601     Z_PresentRequest *pr = apdu_req->u.presentRequest;
1602
1603     mp::odr odr;
1604     if (!m_backend)
1605     {
1606         package.response() = odr.create_presentResponse(
1607             apdu_req, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST, 0);
1608         return;
1609     }
1610     const char *element_set_name = 0;
1611     Z_RecordComposition *comp = pr->recordComposition;
1612     if (comp && comp->which != Z_RecordComp_simple)
1613     {
1614         package.response() = odr.create_presentResponse(
1615             apdu_req,
1616             YAZ_BIB1_PRESENT_COMP_SPEC_PARAMETER_UNSUPP, 0);
1617         return;
1618     }
1619     if (comp && comp->u.simple->which == Z_ElementSetNames_generic)
1620         element_set_name = comp->u.simple->u.generic;
1621     Odr_int number_of_records_returned = 0;
1622     int error = 0;
1623     char *addinfo = 0;
1624     Z_Records *records = get_records(
1625         *pr->resultSetStartPoint - 1, *pr->numberOfRecordsRequested,
1626         &error, &addinfo, &number_of_records_returned, odr, m_backend,
1627         pr->preferredRecordSyntax, element_set_name);
1628
1629     apdu_res = odr.create_presentResponse(apdu_req, error, addinfo);
1630     if (records)
1631     {
1632         apdu_res->u.presentResponse->records = records;
1633         apdu_res->u.presentResponse->numberOfRecordsReturned =
1634             odr_intdup(odr, number_of_records_returned);
1635     }
1636     package.response() = apdu_res;
1637 }
1638
1639 void yf::Zoom::Frontend::handle_package(mp::Package &package)
1640 {
1641     Z_GDU *gdu = package.request().get();
1642     if (!gdu)
1643         ;
1644     else if (gdu->which == Z_GDU_Z3950)
1645     {
1646         Z_APDU *apdu_req = gdu->u.z3950;
1647
1648         if (m_backend)
1649             wrbuf_rewind(m_backend->m_apdu_wrbuf);
1650         if (apdu_req->which == Z_APDU_initRequest)
1651         {
1652             mp::odr odr;
1653             package.response() = odr.create_close(
1654                 apdu_req,
1655                 Z_Close_protocolError,
1656                 "double init");
1657         }
1658         else if (apdu_req->which == Z_APDU_searchRequest)
1659         {
1660             handle_search(package);
1661         }
1662         else if (apdu_req->which == Z_APDU_presentRequest)
1663         {
1664             handle_present(package);
1665         }
1666         else
1667         {
1668             mp::odr odr;
1669             package.response() = odr.create_close(
1670                 apdu_req,
1671                 Z_Close_protocolError,
1672                 "zoom filter cannot handle this APDU");
1673             package.session().close();
1674         }
1675         if (m_backend)
1676         {
1677             WRBUF w = m_backend->m_apdu_wrbuf;
1678             package.log_write(wrbuf_buf(w), wrbuf_len(w));
1679         }
1680     }
1681     else
1682     {
1683         package.session().close();
1684     }
1685 }
1686
1687 void yf::Zoom::Impl::process(mp::Package &package)
1688 {
1689     FrontendPtr f = get_frontend(package);
1690     Z_GDU *gdu = package.request().get();
1691
1692     if (f->m_is_virtual)
1693     {
1694         f->handle_package(package);
1695     }
1696     else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1697              Z_APDU_initRequest)
1698     {
1699         Z_InitRequest *req = gdu->u.z3950->u.initRequest;
1700         f->m_init_gdu = gdu;
1701
1702         mp::odr odr;
1703         Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
1704         Z_InitResponse *resp = apdu->u.initResponse;
1705
1706         int i;
1707         static const int masks[] = {
1708             Z_Options_search,
1709             Z_Options_present,
1710             -1
1711         };
1712         for (i = 0; masks[i] != -1; i++)
1713             if (ODR_MASK_GET(req->options, masks[i]))
1714                 ODR_MASK_SET(resp->options, masks[i]);
1715
1716         static const int versions[] = {
1717             Z_ProtocolVersion_1,
1718             Z_ProtocolVersion_2,
1719             Z_ProtocolVersion_3,
1720             -1
1721         };
1722         for (i = 0; versions[i] != -1; i++)
1723             if (ODR_MASK_GET(req->protocolVersion, versions[i]))
1724                 ODR_MASK_SET(resp->protocolVersion, versions[i]);
1725             else
1726                 break;
1727
1728         *resp->preferredMessageSize = *req->preferredMessageSize;
1729         *resp->maximumRecordSize = *req->maximumRecordSize;
1730
1731         package.response() = apdu;
1732         f->m_is_virtual = true;
1733     }
1734     else
1735         package.move();
1736
1737     release_frontend(package);
1738 }
1739
1740
1741 static mp::filter::Base* filter_creator()
1742 {
1743     return new mp::filter::Zoom;
1744 }
1745
1746 extern "C" {
1747     struct metaproxy_1_filter_struct metaproxy_1_filter_zoom = {
1748         0,
1749         "zoom",
1750         filter_creator
1751     };
1752 }
1753
1754
1755 /*
1756  * Local variables:
1757  * c-basic-offset: 4
1758  * c-file-style: "Stroustrup"
1759  * indent-tabs-mode: nil
1760  * End:
1761  * vim: shiftwidth=4 tabstop=8 expandtab
1762  */
1763