1 /* This file is part of Metaproxy.
2 Copyright (C) 2005-2011 Index Data
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
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
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
20 #include "filter_zoom.hpp"
23 #include <metaproxy/package.hpp>
24 #include <metaproxy/util.hpp>
27 #include <libxslt/xsltutils.h>
28 #include <libxslt/transform.h>
30 #include <boost/thread/mutex.hpp>
31 #include <boost/thread/condition.hpp>
32 #include <yaz/ccl_xml.h>
34 #include <yaz/rpn2cql.h>
35 #include <yaz/pquery.h>
37 #include <yaz/oid_db.h>
38 #include <yaz/diagbib1.h>
41 #include <yaz/querytowrbuf.h>
43 namespace mp = metaproxy_1;
44 namespace yf = mp::filter;
46 namespace metaproxy_1 {
48 struct Zoom::Searchable : boost::noncopyable {
49 std::string authentication;
55 std::string query_encoding;
57 std::string request_syntax;
58 std::string element_set;
59 std::string record_encoding;
60 std::string transform_xsl_fname;
63 CCL_bibset ccl_bibset;
67 class Zoom::Backend : boost::noncopyable {
69 friend class Frontend;
71 ZOOM_connection m_connection;
72 ZOOM_resultset m_resultset;
73 std::string m_frontend_database;
75 xsltStylesheetPtr xsp;
77 Backend(SearchablePtr sptr);
79 void connect(std::string zurl, int *error, const char **addinfo);
80 void search_pqf(const char *pqf, Odr_int *hits,
81 int *error, const char **addinfo);
82 void search_cql(const char *cql, Odr_int *hits,
83 int *error, const char **addinfo);
84 void present(Odr_int start, Odr_int number, ZOOM_record *recs,
85 int *error, const char **addinfo);
86 void set_option(const char *name, const char *value);
87 const char *get_option(const char *name);
88 int get_error(const char **addinfo);
90 class Zoom::Frontend : boost::noncopyable {
95 yazpp_1::GDU m_init_gdu;
97 void handle_package(mp::Package &package);
98 void handle_search(mp::Package &package);
99 void handle_present(mp::Package &package);
100 BackendPtr get_backend_from_databases(std::string &database,
102 const char **addinfo);
103 Z_Records *get_records(Odr_int start,
104 Odr_int number_to_present,
106 const char **addinfo,
107 Odr_int *number_of_records_returned,
108 ODR odr, BackendPtr b,
109 Odr_oid *preferredRecordSyntax,
110 const char *element_set_name);
112 Frontend(Impl *impl);
116 friend class Frontend;
120 void process(metaproxy_1::Package & package);
121 void configure(const xmlNode * ptr, bool test_only);
123 FrontendPtr get_frontend(mp::Package &package);
124 void release_frontend(mp::Package &package);
125 SearchablePtr parse_torus(const xmlNode *ptr);
126 struct cql_node *convert_cql_fields(struct cql_node *cn, ODR odr);
127 std::map<mp::Session, FrontendPtr> m_clients;
128 boost::mutex m_mutex;
129 boost::condition m_cond_session_ready;
130 std::string torus_url;
131 std::map<std::string,std::string> fieldmap;
138 // define Pimpl wrapper forwarding to Impl
140 yf::Zoom::Zoom() : m_p(new Impl)
145 { // must have a destructor because of boost::scoped_ptr
148 void yf::Zoom::configure(const xmlNode *xmlnode, bool test_only)
150 m_p->configure(xmlnode, test_only);
153 void yf::Zoom::process(mp::Package &package) const
155 m_p->process(package);
159 // define Implementation stuff
161 yf::Zoom::Backend::Backend(SearchablePtr ptr) : sptr(ptr)
163 m_connection = ZOOM_connection_create(0);
168 yf::Zoom::Backend::~Backend()
171 xsltFreeStylesheet(xsp);
172 ZOOM_connection_destroy(m_connection);
173 ZOOM_resultset_destroy(m_resultset);
176 void yf::Zoom::Backend::connect(std::string zurl,
177 int *error, const char **addinfo)
179 ZOOM_connection_connect(m_connection, zurl.c_str(), 0);
180 *error = ZOOM_connection_error(m_connection, 0, addinfo);
183 void yf::Zoom::Backend::search_pqf(const char *pqf, Odr_int *hits,
184 int *error, const char **addinfo)
186 m_resultset = ZOOM_connection_search_pqf(m_connection, pqf);
187 *error = ZOOM_connection_error(m_connection, 0, addinfo);
189 *hits = ZOOM_resultset_size(m_resultset);
194 void yf::Zoom::Backend::search_cql(const char *cql, Odr_int *hits,
195 int *error, const char **addinfo)
197 ZOOM_query q = ZOOM_query_create();
199 ZOOM_query_cql(q, cql);
201 m_resultset = ZOOM_connection_search(m_connection, q);
202 ZOOM_query_destroy(q);
203 *error = ZOOM_connection_error(m_connection, 0, addinfo);
205 *hits = ZOOM_resultset_size(m_resultset);
210 void yf::Zoom::Backend::present(Odr_int start, Odr_int number,
212 int *error, const char **addinfo)
214 ZOOM_resultset_records(m_resultset, recs, start, number);
215 *error = ZOOM_connection_error(m_connection, 0, addinfo);
218 void yf::Zoom::Backend::set_option(const char *name, const char *value)
220 ZOOM_connection_option_set(m_connection, name, value);
222 ZOOM_resultset_option_set(m_resultset, name, value);
225 const char *yf::Zoom::Backend::get_option(const char *name)
227 return ZOOM_connection_option_get(m_connection, name);
230 int yf::Zoom::Backend::get_error(const char **addinfo)
232 return ZOOM_connection_error(m_connection, 0, addinfo);
235 yf::Zoom::Searchable::Searchable()
238 use_turbomarc = true;
239 ccl_bibset = ccl_qual_mk();
242 yf::Zoom::Searchable::~Searchable()
244 ccl_qual_rm(&ccl_bibset);
247 yf::Zoom::Frontend::Frontend(Impl *impl) :
248 m_p(impl), m_is_virtual(false), m_in_use(true)
252 yf::Zoom::Frontend::~Frontend()
256 yf::Zoom::FrontendPtr yf::Zoom::Impl::get_frontend(mp::Package &package)
258 boost::mutex::scoped_lock lock(m_mutex);
260 std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
264 it = m_clients.find(package.session());
265 if (it == m_clients.end())
268 if (!it->second->m_in_use)
270 it->second->m_in_use = true;
273 m_cond_session_ready.wait(lock);
275 FrontendPtr f(new Frontend(this));
276 m_clients[package.session()] = f;
281 void yf::Zoom::Impl::release_frontend(mp::Package &package)
283 boost::mutex::scoped_lock lock(m_mutex);
284 std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
286 it = m_clients.find(package.session());
287 if (it != m_clients.end())
289 if (package.session().is_closed())
295 it->second->m_in_use = false;
297 m_cond_session_ready.notify_all();
301 yf::Zoom::Impl::Impl()
303 bibset = ccl_qual_mk();
306 yf::Zoom::Impl::~Impl()
308 ccl_qual_rm(&bibset);
311 yf::Zoom::SearchablePtr yf::Zoom::Impl::parse_torus(const xmlNode *ptr1)
313 SearchablePtr notfound;
316 for (ptr1 = ptr1->children; ptr1; ptr1 = ptr1->next)
318 if (ptr1->type != XML_ELEMENT_NODE)
320 if (!strcmp((const char *) ptr1->name, "record"))
322 const xmlNode *ptr2 = ptr1;
323 for (ptr2 = ptr2->children; ptr2; ptr2 = ptr2->next)
325 if (ptr2->type != XML_ELEMENT_NODE)
327 if (!strcmp((const char *) ptr2->name, "layer"))
329 Zoom::SearchablePtr s(new Searchable);
331 const xmlNode *ptr3 = ptr2;
332 for (ptr3 = ptr3->children; ptr3; ptr3 = ptr3->next)
334 if (ptr3->type != XML_ELEMENT_NODE)
336 if (!strcmp((const char *) ptr3->name,
339 s->authentication = mp::xml::get_text(ptr3);
341 else if (!strcmp((const char *) ptr3->name,
344 s->cfAuth = mp::xml::get_text(ptr3);
346 else if (!strcmp((const char *) ptr3->name,
349 s->cfProxy = mp::xml::get_text(ptr3);
351 else if (!strcmp((const char *) ptr3->name,
354 s->cfSubDb = mp::xml::get_text(ptr3);
356 else if (!strcmp((const char *) ptr3->name, "id"))
358 s->database = mp::xml::get_text(ptr3);
360 else if (!strcmp((const char *) ptr3->name, "zurl"))
362 s->target = mp::xml::get_text(ptr3);
364 else if (!strcmp((const char *) ptr3->name, "sru"))
366 s->sru = mp::xml::get_text(ptr3);
368 else if (!strcmp((const char *) ptr3->name,
371 s->query_encoding = mp::xml::get_text(ptr3);
373 else if (!strcmp((const char *) ptr3->name,
376 s->piggyback = mp::xml::get_bool(ptr3, true);
378 else if (!strcmp((const char *) ptr3->name,
381 s->request_syntax = mp::xml::get_text(ptr3);
383 else if (!strcmp((const char *) ptr3->name,
386 s->element_set = mp::xml::get_text(ptr3);
388 else if (!strcmp((const char *) ptr3->name,
391 s->record_encoding = mp::xml::get_text(ptr3);
393 else if (!strcmp((const char *) ptr3->name,
396 s->transform_xsl_fname = mp::xml::get_text(ptr3);
398 else if (!strcmp((const char *) ptr3->name,
401 ; // useTurboMarc is ignored
403 else if (!strncmp((const char *) ptr3->name,
406 std::string value = mp::xml::get_text(ptr3);
407 ccl_qual_fitem(s->ccl_bibset, value.c_str(),
408 (const char *) ptr3->name + 7);
419 void yf::Zoom::Impl::configure(const xmlNode *ptr, bool test_only)
421 for (ptr = ptr->children; ptr; ptr = ptr->next)
423 if (ptr->type != XML_ELEMENT_NODE)
425 else if (!strcmp((const char *) ptr->name, "torus"))
427 const struct _xmlAttr *attr;
428 for (attr = ptr->properties; attr; attr = attr->next)
430 if (!strcmp((const char *) attr->name, "url"))
431 torus_url = mp::xml::get_text(attr->children);
432 else if (!strcmp((const char *) attr->name, "xsldir"))
433 xsldir = mp::xml::get_text(attr->children);
435 throw mp::filter::FilterException(
436 "Bad attribute " + std::string((const char *)
440 else if (!strcmp((const char *) ptr->name, "cclmap"))
442 const char *addinfo = 0;
443 ccl_xml_config(bibset, ptr, &addinfo);
445 else if (!strcmp((const char *) ptr->name, "fieldmap"))
447 const struct _xmlAttr *attr;
448 std::string ccl_field;
449 std::string cql_field;
450 for (attr = ptr->properties; attr; attr = attr->next)
452 if (!strcmp((const char *) attr->name, "ccl"))
453 ccl_field = mp::xml::get_text(attr->children);
454 else if (!strcmp((const char *) attr->name, "cql"))
455 cql_field = mp::xml::get_text(attr->children);
457 throw mp::filter::FilterException(
458 "Bad attribute " + std::string((const char *)
461 if (cql_field.length())
462 fieldmap[cql_field] = ccl_field;
464 else if (!strcmp((const char *) ptr->name, "records"))
466 yaz_log(YLOG_WARN, "records ignored!");
470 throw mp::filter::FilterException
472 + std::string((const char *) ptr->name)
473 + " in zoom filter");
478 yf::Zoom::BackendPtr yf::Zoom::Frontend::get_backend_from_databases(
479 std::string &database, int *error, const char **addinfo)
481 std::list<BackendPtr>::const_iterator map_it;
482 if (m_backend && m_backend->m_frontend_database == database)
485 bool db_args = false;
486 std::string torus_db;
487 size_t db_arg_pos = database.find(',');
488 if (db_arg_pos != std::string::npos)
490 torus_db = database.substr(0, db_arg_pos);
496 xmlDoc *doc = mp::get_searchable(m_p->torus_url, torus_db);
499 *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
500 *addinfo = database.c_str();
504 SearchablePtr sptr = m_p->parse_torus(xmlDocGetRootElement(doc));
508 *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
509 *addinfo = database.c_str();
514 xsltStylesheetPtr xsp = 0;
515 if (sptr->transform_xsl_fname.length())
519 if (m_p->xsldir.length())
520 fname = m_p->xsldir + "/" + sptr->transform_xsl_fname;
522 fname = sptr->transform_xsl_fname;
523 xmlDoc *xsp_doc = xmlParseFile(fname.c_str());
526 *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
527 *addinfo = "xmlParseFile failed";
531 xsp = xsltParseStylesheetDoc(xsp_doc);
534 *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
535 *addinfo = "xsltParseStylesheetDoc failed";
544 BackendPtr b(new Backend(sptr));
548 b->m_frontend_database = database;
549 std::string authentication = sptr->authentication;
551 if (sptr->query_encoding.length())
552 b->set_option("rpnCharset", sptr->query_encoding.c_str());
554 if (sptr->cfAuth.length())
556 b->set_option("user", sptr->cfAuth.c_str());
557 if (authentication.length())
559 size_t found = authentication.find('/');
560 if (found != std::string::npos)
562 cf_parm += "user=" + mp::util::uri_encode(authentication.substr(0, found))
563 + "&password=" + mp::util::uri_encode(authentication.substr(found+1));
566 cf_parm += "user=" + mp::util::uri_encode(authentication);
569 else if (authentication.length())
570 b->set_option("user", authentication.c_str());
572 if (sptr->cfProxy.length())
574 if (cf_parm.length())
576 cf_parm += "proxy=" + mp::util::uri_encode(sptr->cfProxy);
578 if (sptr->cfSubDb.length())
580 if (cf_parm.length())
582 cf_parm += "subdatabase=" + mp::util::uri_encode(sptr->cfSubDb);
586 if (sptr->sru.length())
588 url = "http://" + sptr->target;
589 b->set_option("sru", sptr->sru.c_str());
595 if (cf_parm.length() && !db_args)
597 url += "," + cf_parm;
599 yaz_log(YLOG_LOG, "url=%s", url.c_str());
600 b->connect(url, error, addinfo);
608 Z_Records *yf::Zoom::Frontend::get_records(Odr_int start,
609 Odr_int number_to_present,
611 const char **addinfo,
612 Odr_int *number_of_records_returned,
615 Odr_oid *preferredRecordSyntax,
616 const char *element_set_name)
618 *number_of_records_returned = 0;
619 Z_Records *records = 0;
620 bool enable_pz2_transform = false;
622 if (start < 0 || number_to_present <= 0)
625 if (number_to_present > 10000)
626 number_to_present = 10000;
628 ZOOM_record *recs = (ZOOM_record *)
629 odr_malloc(odr, number_to_present * sizeof(*recs));
631 char oid_name_str[OID_STR_MAX];
632 const char *syntax_name = 0;
634 if (preferredRecordSyntax)
636 if (!oid_oidcmp(preferredRecordSyntax, yaz_oid_recsyn_xml)
637 && element_set_name &&
638 !strcmp(element_set_name, "pz2"))
640 if (b->sptr->request_syntax.length())
642 syntax_name = b->sptr->request_syntax.c_str();
643 enable_pz2_transform = true;
649 yaz_oid_to_string_buf(preferredRecordSyntax, 0, oid_name_str);
653 b->set_option("preferredRecordSyntax", syntax_name);
655 if (enable_pz2_transform)
657 element_set_name = "F";
658 if (b->sptr->element_set.length())
659 element_set_name = b->sptr->element_set.c_str();
662 b->set_option("elementSetName", element_set_name);
664 b->present(start, number_to_present, recs, error, addinfo);
669 for (i = 0; i < number_to_present; i++)
674 { // only return records if no error and at least one record
675 char *odr_database = odr_strdup(odr,
676 b->m_frontend_database.c_str());
677 Z_NamePlusRecordList *npl = (Z_NamePlusRecordList *)
678 odr_malloc(odr, sizeof(*npl));
679 *number_of_records_returned = i;
680 npl->num_records = i;
681 npl->records = (Z_NamePlusRecord **)
682 odr_malloc(odr, i * sizeof(*npl->records));
683 for (i = 0; i < number_to_present; i++)
685 Z_NamePlusRecord *npr = 0;
687 int sur_error = ZOOM_record_error(recs[i], 0 /* msg */,
688 &addinfo, 0 /* diagset */);
692 npr = zget_surrogateDiagRec(odr, odr_database, sur_error,
695 else if (enable_pz2_transform)
697 char rec_type_str[100];
699 strcpy(rec_type_str, b->sptr->use_turbomarc ?
702 // prevent buffer overflow ...
703 if (b->sptr->record_encoding.length() > 0 &&
704 b->sptr->record_encoding.length() <
705 (sizeof(rec_type_str)-20))
707 strcat(rec_type_str, "; charset=");
708 strcat(rec_type_str, b->sptr->record_encoding.c_str());
712 const char *rec_buf = ZOOM_record_get(recs[i], rec_type_str,
714 if (rec_buf && b->xsp)
716 xmlDoc *rec_doc = xmlParseMemory(rec_buf, rec_len);
720 rec_res = xsltApplyStylesheet(b->xsp, rec_doc, 0);
723 xsltSaveResultToString((xmlChar **) &rec_buf, &rec_len,
730 npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
731 npr->databaseName = odr_database;
732 npr->which = Z_NamePlusRecord_databaseRecord;
733 npr->u.databaseRecord =
734 z_ext_record_xml(odr, rec_buf, rec_len);
738 npr = zget_surrogateDiagRec(
740 YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
747 (Z_External *) ZOOM_record_get(recs[i], "ext", 0);
750 npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
751 npr->databaseName = odr_database;
752 npr->which = Z_NamePlusRecord_databaseRecord;
753 npr->u.databaseRecord = ext;
757 npr = zget_surrogateDiagRec(
759 YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
760 "ZOOM_record, type ext");
763 npl->records[i] = npr;
765 records = (Z_Records*) odr_malloc(odr, sizeof(*records));
766 records->which = Z_Records_DBOSD;
767 records->u.databaseOrSurDiagnostics = npl;
772 struct cql_node *yf::Zoom::Impl::convert_cql_fields(struct cql_node *cn,
775 struct cql_node *r = 0;
783 std::map<std::string,std::string>::const_iterator it;
784 it = fieldmap.find(cn->u.st.index);
785 if (it == fieldmap.end())
787 if (it->second.length())
788 cn->u.st.index = odr_strdup(odr, it->second.c_str());
794 r = convert_cql_fields(cn->u.boolean.left, odr);
796 r = convert_cql_fields(cn->u.boolean.right, odr);
799 r = convert_cql_fields(cn->u.sort.search, odr);
805 void yf::Zoom::Frontend::handle_search(mp::Package &package)
807 Z_GDU *gdu = package.request().get();
808 Z_APDU *apdu_req = gdu->u.z3950;
809 Z_APDU *apdu_res = 0;
811 Z_SearchRequest *sr = apdu_req->u.searchRequest;
812 if (sr->num_databaseNames != 1)
814 apdu_res = odr.create_searchResponse(
815 apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
816 package.response() = apdu_res;
821 const char *addinfo = 0;
822 std::string db(sr->databaseNames[0]);
823 BackendPtr b = get_backend_from_databases(db, &error, &addinfo);
827 odr.create_searchResponse(
828 apdu_req, error, addinfo);
829 package.response() = apdu_res;
833 b->set_option("setname", "default");
836 Z_Query *query = sr->query;
840 if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
843 pqf_wrbuf = wrbuf_alloc();
844 yaz_rpnquery_to_wrbuf(pqf_wrbuf, query->u.type_1);
846 else if (query->which == Z_Query_type_2)
849 ccl_wrbuf = wrbuf_alloc();
850 wrbuf_write(ccl_wrbuf, (const char *) query->u.type_2->buf,
851 query->u.type_2->len);
853 else if (query->which == Z_Query_type_104 &&
854 query->u.type_104->which == Z_External_CQL)
857 const char *cql = query->u.type_104->u.cql;
858 CQL_parser cp = cql_parser_create();
859 int r = cql_parser_string(cp, cql);
862 cql_parser_destroy(cp);
864 odr.create_searchResponse(apdu_req,
865 YAZ_BIB1_MALFORMED_QUERY,
867 package.response() = apdu_res;
870 struct cql_node *cn = cql_parser_result(cp);
871 struct cql_node *cn_error = m_p->convert_cql_fields(cn, odr);
874 // hopefully we are getting a ptr to a index+relation+term node
876 if (cn_error->which == CQL_NODE_ST)
877 addinfo = cn_error->u.st.index;
880 odr.create_searchResponse(apdu_req,
881 YAZ_BIB1_UNSUPP_USE_ATTRIBUTE,
883 package.response() = apdu_res;
888 r = cql_to_ccl_buf(cn, ccl_buf, sizeof(ccl_buf));
891 ccl_wrbuf = wrbuf_alloc();
892 wrbuf_puts(ccl_wrbuf, ccl_buf);
894 cql_parser_destroy(cp);
898 odr.create_searchResponse(apdu_req,
899 YAZ_BIB1_MALFORMED_QUERY,
900 "CQL to CCL conversion error");
901 package.response() = apdu_res;
908 odr.create_searchResponse(apdu_req, YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
909 package.response() = apdu_res;
916 assert(pqf_wrbuf == 0);
918 struct ccl_rpn_node *cn;
919 yaz_log(YLOG_LOG, "CCL: %s", wrbuf_cstr(ccl_wrbuf));
920 cn = ccl_find_str(b->sptr->ccl_bibset, wrbuf_cstr(ccl_wrbuf),
922 wrbuf_destroy(ccl_wrbuf);
925 char *addinfo = odr_strdup(odr, ccl_err_msg(cerror));
926 int z3950_diag = YAZ_BIB1_MALFORMED_QUERY;
930 case CCL_ERR_UNKNOWN_QUAL:
931 z3950_diag = YAZ_BIB1_UNSUPP_USE_ATTRIBUTE;
933 case CCL_ERR_TRUNC_NOT_LEFT:
934 case CCL_ERR_TRUNC_NOT_RIGHT:
935 case CCL_ERR_TRUNC_NOT_BOTH:
936 z3950_diag = YAZ_BIB1_UNSUPP_TRUNCATION_ATTRIBUTE;
940 odr.create_searchResponse(apdu_req, z3950_diag, addinfo);
941 package.response() = apdu_res;
944 pqf_wrbuf = wrbuf_alloc();
945 ccl_pquery(pqf_wrbuf, cn);
950 if (b->get_option("sru"))
952 cql_transform_t cqlt = cql_transform_create();
954 WRBUF wrb = wrbuf_alloc();
957 zquery = p_query_rpn(odr, wrbuf_cstr(pqf_wrbuf));
958 status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery);
960 cql_transform_close(cqlt);
964 yaz_log(YLOG_LOG, "search CQL: %s", wrbuf_cstr(wrb));
965 b->search_cql(wrbuf_cstr(wrb), &hits, &error, &addinfo);
969 wrbuf_destroy(pqf_wrbuf);
973 odr.create_searchResponse(apdu_req, YAZ_BIB1_MALFORMED_QUERY,
974 "can not convert from RPN to CQL");
975 package.response() = apdu_res;
981 yaz_log(YLOG_LOG, "search PQF: %s", wrbuf_cstr(pqf_wrbuf));
982 b->search_pqf(wrbuf_cstr(pqf_wrbuf), &hits, &error, &addinfo);
983 wrbuf_destroy(pqf_wrbuf);
987 const char *element_set_name = 0;
988 Odr_int number_to_present = 0;
990 mp::util::piggyback_sr(sr, hits, number_to_present, &element_set_name);
992 Odr_int number_of_records_returned = 0;
993 Z_Records *records = get_records(
994 0, number_to_present, &error, &addinfo,
995 &number_of_records_returned, odr, b, sr->preferredRecordSyntax,
997 apdu_res = odr.create_searchResponse(apdu_req, error, addinfo);
1000 apdu_res->u.searchResponse->records = records;
1001 apdu_res->u.searchResponse->numberOfRecordsReturned =
1002 odr_intdup(odr, number_of_records_returned);
1004 apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
1005 package.response() = apdu_res;
1008 void yf::Zoom::Frontend::handle_present(mp::Package &package)
1010 Z_GDU *gdu = package.request().get();
1011 Z_APDU *apdu_req = gdu->u.z3950;
1012 Z_APDU *apdu_res = 0;
1013 Z_PresentRequest *pr = apdu_req->u.presentRequest;
1018 package.response() = odr.create_presentResponse(
1019 apdu_req, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST, 0);
1022 const char *element_set_name = 0;
1023 Z_RecordComposition *comp = pr->recordComposition;
1024 if (comp && comp->which != Z_RecordComp_simple)
1026 package.response() = odr.create_presentResponse(
1028 YAZ_BIB1_PRESENT_COMP_SPEC_PARAMETER_UNSUPP, 0);
1031 if (comp && comp->u.simple->which == Z_ElementSetNames_generic)
1032 element_set_name = comp->u.simple->u.generic;
1033 Odr_int number_of_records_returned = 0;
1035 const char *addinfo = 0;
1036 Z_Records *records = get_records(
1037 *pr->resultSetStartPoint - 1, *pr->numberOfRecordsRequested,
1038 &error, &addinfo, &number_of_records_returned, odr, m_backend,
1039 pr->preferredRecordSyntax, element_set_name);
1041 apdu_res = odr.create_presentResponse(apdu_req, error, addinfo);
1044 apdu_res->u.presentResponse->records = records;
1045 apdu_res->u.presentResponse->numberOfRecordsReturned =
1046 odr_intdup(odr, number_of_records_returned);
1048 package.response() = apdu_res;
1051 void yf::Zoom::Frontend::handle_package(mp::Package &package)
1053 Z_GDU *gdu = package.request().get();
1056 else if (gdu->which == Z_GDU_Z3950)
1058 Z_APDU *apdu_req = gdu->u.z3950;
1059 if (apdu_req->which == Z_APDU_initRequest)
1062 package.response() = odr.create_close(
1064 Z_Close_protocolError,
1067 else if (apdu_req->which == Z_APDU_searchRequest)
1069 handle_search(package);
1071 else if (apdu_req->which == Z_APDU_presentRequest)
1073 handle_present(package);
1078 package.response() = odr.create_close(
1080 Z_Close_protocolError,
1081 "zoom filter cannot handle this APDU");
1082 package.session().close();
1087 package.session().close();
1091 void yf::Zoom::Impl::process(mp::Package &package)
1093 FrontendPtr f = get_frontend(package);
1094 Z_GDU *gdu = package.request().get();
1096 if (f->m_is_virtual)
1098 f->handle_package(package);
1100 else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1103 Z_InitRequest *req = gdu->u.z3950->u.initRequest;
1104 f->m_init_gdu = gdu;
1107 Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
1108 Z_InitResponse *resp = apdu->u.initResponse;
1111 static const int masks[] = {
1116 for (i = 0; masks[i] != -1; i++)
1117 if (ODR_MASK_GET(req->options, masks[i]))
1118 ODR_MASK_SET(resp->options, masks[i]);
1120 static const int versions[] = {
1121 Z_ProtocolVersion_1,
1122 Z_ProtocolVersion_2,
1123 Z_ProtocolVersion_3,
1126 for (i = 0; versions[i] != -1; i++)
1127 if (ODR_MASK_GET(req->protocolVersion, versions[i]))
1128 ODR_MASK_SET(resp->protocolVersion, versions[i]);
1132 *resp->preferredMessageSize = *req->preferredMessageSize;
1133 *resp->maximumRecordSize = *req->maximumRecordSize;
1135 package.response() = apdu;
1136 f->m_is_virtual = true;
1141 release_frontend(package);
1145 static mp::filter::Base* filter_creator()
1147 return new mp::filter::Zoom;
1151 struct metaproxy_1_filter_struct metaproxy_1_filter_zoom = {
1162 * c-file-style: "Stroustrup"
1163 * indent-tabs-mode: nil
1165 * vim: shiftwidth=4 tabstop=8 expandtab