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