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>
33 #include <yaz/rpn2cql.h>
34 #include <yaz/pquery.h>
36 #include <yaz/oid_db.h>
37 #include <yaz/diagbib1.h>
40 #include <yaz/querytowrbuf.h>
42 namespace mp = metaproxy_1;
43 namespace yf = mp::filter;
45 namespace metaproxy_1 {
47 struct Zoom::Searchable : boost::noncopyable {
48 std::string authentication;
54 std::string query_encoding;
56 std::string request_syntax;
57 std::string element_set;
58 std::string record_encoding;
59 std::string transform_xsl_fname;
62 CCL_bibset ccl_bibset;
66 class Zoom::Backend : boost::noncopyable {
68 friend class Frontend;
70 ZOOM_connection m_connection;
71 ZOOM_resultset m_resultset;
72 std::string m_frontend_database;
74 xsltStylesheetPtr xsp;
76 Backend(SearchablePtr sptr);
78 void connect(std::string zurl, int *error, const char **addinfo);
79 void search_pqf(const char *pqf, Odr_int *hits,
80 int *error, const char **addinfo);
81 void search_cql(const char *cql, Odr_int *hits,
82 int *error, const char **addinfo);
83 void present(Odr_int start, Odr_int number, ZOOM_record *recs,
84 int *error, const char **addinfo);
85 void set_option(const char *name, const char *value);
86 const char *get_option(const char *name);
87 void get_zoom_error(int *error, const char **addinfo);
89 class Zoom::Frontend : boost::noncopyable {
94 yazpp_1::GDU m_init_gdu;
96 void handle_package(mp::Package &package);
97 void handle_search(mp::Package &package);
98 void handle_present(mp::Package &package);
99 BackendPtr get_backend_from_databases(std::string &database,
101 const char **addinfo);
102 Z_Records *get_records(Odr_int start,
103 Odr_int number_to_present,
105 const char **addinfo,
106 Odr_int *number_of_records_returned,
107 ODR odr, BackendPtr b,
108 Odr_oid *preferredRecordSyntax,
109 const char *element_set_name);
111 Frontend(Impl *impl);
115 friend class Frontend;
119 void process(metaproxy_1::Package & package);
120 void configure(const xmlNode * ptr, bool test_only);
122 FrontendPtr get_frontend(mp::Package &package);
123 void release_frontend(mp::Package &package);
124 SearchablePtr parse_torus(const xmlNode *ptr);
125 struct cql_node *convert_cql_fields(struct cql_node *cn, ODR odr);
126 std::map<mp::Session, FrontendPtr> m_clients;
127 boost::mutex m_mutex;
128 boost::condition m_cond_session_ready;
129 std::string torus_url;
130 std::map<std::string,std::string> fieldmap;
136 // define Pimpl wrapper forwarding to Impl
138 yf::Zoom::Zoom() : m_p(new Impl)
143 { // must have a destructor because of boost::scoped_ptr
146 void yf::Zoom::configure(const xmlNode *xmlnode, bool test_only)
148 m_p->configure(xmlnode, test_only);
151 void yf::Zoom::process(mp::Package &package) const
153 m_p->process(package);
157 // define Implementation stuff
159 yf::Zoom::Backend::Backend(SearchablePtr ptr) : sptr(ptr)
161 m_connection = ZOOM_connection_create(0);
166 yf::Zoom::Backend::~Backend()
169 xsltFreeStylesheet(xsp);
170 ZOOM_connection_destroy(m_connection);
171 ZOOM_resultset_destroy(m_resultset);
175 void yf::Zoom::Backend::get_zoom_error(int *error, const char **addinfo)
178 *error = ZOOM_connection_error(m_connection, &msg, addinfo);
181 if (*error >= ZOOM_ERROR_CONNECT)
183 // turn ZOOM diagnostic into a Bib-1 2: with addinfo=zoom err msg
184 *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
191 void yf::Zoom::Backend::connect(std::string zurl,
192 int *error, const char **addinfo)
194 ZOOM_connection_connect(m_connection, zurl.c_str(), 0);
195 get_zoom_error(error, addinfo);
198 void yf::Zoom::Backend::search_pqf(const char *pqf, Odr_int *hits,
199 int *error, const char **addinfo)
201 m_resultset = ZOOM_connection_search_pqf(m_connection, pqf);
202 get_zoom_error(error, addinfo);
204 *hits = ZOOM_resultset_size(m_resultset);
209 void yf::Zoom::Backend::search_cql(const char *cql, Odr_int *hits,
210 int *error, const char **addinfo)
212 ZOOM_query q = ZOOM_query_create();
214 ZOOM_query_cql(q, cql);
216 m_resultset = ZOOM_connection_search(m_connection, q);
217 ZOOM_query_destroy(q);
218 get_zoom_error(error, addinfo);
220 *hits = ZOOM_resultset_size(m_resultset);
225 void yf::Zoom::Backend::present(Odr_int start, Odr_int number,
227 int *error, const char **addinfo)
229 ZOOM_resultset_records(m_resultset, recs, start, number);
230 get_zoom_error(error, addinfo);
233 void yf::Zoom::Backend::set_option(const char *name, const char *value)
235 ZOOM_connection_option_set(m_connection, name, value);
237 ZOOM_resultset_option_set(m_resultset, name, value);
240 const char *yf::Zoom::Backend::get_option(const char *name)
242 return ZOOM_connection_option_get(m_connection, name);
245 yf::Zoom::Searchable::Searchable()
248 use_turbomarc = true;
249 ccl_bibset = ccl_qual_mk();
252 yf::Zoom::Searchable::~Searchable()
254 ccl_qual_rm(&ccl_bibset);
257 yf::Zoom::Frontend::Frontend(Impl *impl) :
258 m_p(impl), m_is_virtual(false), m_in_use(true)
262 yf::Zoom::Frontend::~Frontend()
266 yf::Zoom::FrontendPtr yf::Zoom::Impl::get_frontend(mp::Package &package)
268 boost::mutex::scoped_lock lock(m_mutex);
270 std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
274 it = m_clients.find(package.session());
275 if (it == m_clients.end())
278 if (!it->second->m_in_use)
280 it->second->m_in_use = true;
283 m_cond_session_ready.wait(lock);
285 FrontendPtr f(new Frontend(this));
286 m_clients[package.session()] = f;
291 void yf::Zoom::Impl::release_frontend(mp::Package &package)
293 boost::mutex::scoped_lock lock(m_mutex);
294 std::map<mp::Session,yf::Zoom::FrontendPtr>::iterator it;
296 it = m_clients.find(package.session());
297 if (it != m_clients.end())
299 if (package.session().is_closed())
305 it->second->m_in_use = false;
307 m_cond_session_ready.notify_all();
311 yf::Zoom::Impl::Impl()
315 yf::Zoom::Impl::~Impl()
319 yf::Zoom::SearchablePtr yf::Zoom::Impl::parse_torus(const xmlNode *ptr1)
321 SearchablePtr notfound;
324 for (ptr1 = ptr1->children; ptr1; ptr1 = ptr1->next)
326 if (ptr1->type != XML_ELEMENT_NODE)
328 if (!strcmp((const char *) ptr1->name, "record"))
330 const xmlNode *ptr2 = ptr1;
331 for (ptr2 = ptr2->children; ptr2; ptr2 = ptr2->next)
333 if (ptr2->type != XML_ELEMENT_NODE)
335 if (!strcmp((const char *) ptr2->name, "layer"))
337 Zoom::SearchablePtr s(new Searchable);
339 const xmlNode *ptr3 = ptr2;
340 for (ptr3 = ptr3->children; ptr3; ptr3 = ptr3->next)
342 if (ptr3->type != XML_ELEMENT_NODE)
344 if (!strcmp((const char *) ptr3->name,
347 s->authentication = mp::xml::get_text(ptr3);
349 else if (!strcmp((const char *) ptr3->name,
352 s->cfAuth = mp::xml::get_text(ptr3);
354 else if (!strcmp((const char *) ptr3->name,
357 s->cfProxy = mp::xml::get_text(ptr3);
359 else if (!strcmp((const char *) ptr3->name,
362 s->cfSubDb = mp::xml::get_text(ptr3);
364 else if (!strcmp((const char *) ptr3->name, "id"))
366 s->database = mp::xml::get_text(ptr3);
368 else if (!strcmp((const char *) ptr3->name, "zurl"))
370 s->target = mp::xml::get_text(ptr3);
372 else if (!strcmp((const char *) ptr3->name, "sru"))
374 s->sru = mp::xml::get_text(ptr3);
376 else if (!strcmp((const char *) ptr3->name,
379 s->query_encoding = mp::xml::get_text(ptr3);
381 else if (!strcmp((const char *) ptr3->name,
384 s->piggyback = mp::xml::get_bool(ptr3, true);
386 else if (!strcmp((const char *) ptr3->name,
389 s->request_syntax = mp::xml::get_text(ptr3);
391 else if (!strcmp((const char *) ptr3->name,
394 s->element_set = mp::xml::get_text(ptr3);
396 else if (!strcmp((const char *) ptr3->name,
399 s->record_encoding = mp::xml::get_text(ptr3);
401 else if (!strcmp((const char *) ptr3->name,
404 s->transform_xsl_fname = mp::xml::get_text(ptr3);
406 else if (!strcmp((const char *) ptr3->name,
409 ; // useTurboMarc is ignored
411 else if (!strncmp((const char *) ptr3->name,
414 std::string value = mp::xml::get_text(ptr3);
415 ccl_qual_fitem(s->ccl_bibset, value.c_str(),
416 (const char *) ptr3->name + 7);
427 void yf::Zoom::Impl::configure(const xmlNode *ptr, bool test_only)
429 for (ptr = ptr->children; ptr; ptr = ptr->next)
431 if (ptr->type != XML_ELEMENT_NODE)
433 else if (!strcmp((const char *) ptr->name, "torus"))
435 const struct _xmlAttr *attr;
436 for (attr = ptr->properties; attr; attr = attr->next)
438 if (!strcmp((const char *) attr->name, "url"))
439 torus_url = mp::xml::get_text(attr->children);
440 else if (!strcmp((const char *) attr->name, "xsldir"))
441 xsldir = mp::xml::get_text(attr->children);
443 throw mp::filter::FilterException(
444 "Bad attribute " + std::string((const char *)
448 else if (!strcmp((const char *) ptr->name, "fieldmap"))
450 const struct _xmlAttr *attr;
451 std::string ccl_field;
452 std::string cql_field;
453 for (attr = ptr->properties; attr; attr = attr->next)
455 if (!strcmp((const char *) attr->name, "ccl"))
456 ccl_field = mp::xml::get_text(attr->children);
457 else if (!strcmp((const char *) attr->name, "cql"))
458 cql_field = mp::xml::get_text(attr->children);
460 throw mp::filter::FilterException(
461 "Bad attribute " + std::string((const char *)
464 if (cql_field.length())
465 fieldmap[cql_field] = ccl_field;
467 else if (!strcmp((const char *) ptr->name, "records"))
469 yaz_log(YLOG_WARN, "records ignored!");
473 throw mp::filter::FilterException
475 + std::string((const char *) ptr->name)
476 + " in zoom filter");
481 yf::Zoom::BackendPtr yf::Zoom::Frontend::get_backend_from_databases(
482 std::string &database, int *error, const char **addinfo)
484 std::list<BackendPtr>::const_iterator map_it;
485 if (m_backend && m_backend->m_frontend_database == database)
490 std::string torus_db;
491 size_t db_arg_pos = database.find(',');
492 if (db_arg_pos != std::string::npos)
494 torus_db = database.substr(0, db_arg_pos);
495 db_args = database.substr(db_arg_pos+1);
500 xmlDoc *doc = mp::get_searchable(m_p->torus_url, torus_db);
503 *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
504 *addinfo = database.c_str();
508 SearchablePtr sptr = m_p->parse_torus(xmlDocGetRootElement(doc));
512 *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
513 *addinfo = database.c_str();
518 xsltStylesheetPtr xsp = 0;
519 if (sptr->transform_xsl_fname.length())
523 if (m_p->xsldir.length())
524 fname = m_p->xsldir + "/" + sptr->transform_xsl_fname;
526 fname = sptr->transform_xsl_fname;
527 xmlDoc *xsp_doc = xmlParseFile(fname.c_str());
530 *error = YAZ_BIB1_TEMPORARY_SYSTEM_ERROR;
531 *addinfo = "xmlParseFile failed";
535 xsp = xsltParseStylesheetDoc(xsp_doc);
538 *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
539 *addinfo = "xsltParseStylesheetDoc failed";
548 BackendPtr b(new Backend(sptr));
551 b->m_frontend_database = database;
552 std::string authentication = sptr->authentication;
554 b->set_option("timeout", "40");
556 if (sptr->query_encoding.length())
557 b->set_option("rpnCharset", sptr->query_encoding.c_str());
559 if (sptr->cfAuth.length())
561 b->set_option("user", sptr->cfAuth.c_str());
562 if (authentication.length())
564 size_t found = authentication.find('/');
565 if (found != std::string::npos)
567 cf_parm += "user=" + mp::util::uri_encode(authentication.substr(0, found))
568 + "&password=" + mp::util::uri_encode(authentication.substr(found+1));
571 cf_parm += "user=" + mp::util::uri_encode(authentication);
574 else if (authentication.length())
575 b->set_option("user", authentication.c_str());
577 if (sptr->cfProxy.length())
579 if (cf_parm.length())
581 cf_parm += "proxy=" + mp::util::uri_encode(sptr->cfProxy);
583 if (sptr->cfSubDb.length())
585 if (cf_parm.length())
587 cf_parm += "subdatabase=" + mp::util::uri_encode(sptr->cfSubDb);
591 if (sptr->sru.length())
593 url = "http://" + sptr->target;
594 b->set_option("sru", sptr->sru.c_str());
600 if (db_args.length())
601 url += "," + db_args;
602 else if (cf_parm.length())
603 url += "," + cf_parm;
604 yaz_log(YLOG_LOG, "url=%s", url.c_str());
605 b->connect(url, error, addinfo);
613 Z_Records *yf::Zoom::Frontend::get_records(Odr_int start,
614 Odr_int number_to_present,
616 const char **addinfo,
617 Odr_int *number_of_records_returned,
620 Odr_oid *preferredRecordSyntax,
621 const char *element_set_name)
623 *number_of_records_returned = 0;
624 Z_Records *records = 0;
625 bool enable_pz2_transform = false;
627 if (start < 0 || number_to_present <= 0)
630 if (number_to_present > 10000)
631 number_to_present = 10000;
633 ZOOM_record *recs = (ZOOM_record *)
634 odr_malloc(odr, number_to_present * sizeof(*recs));
636 char oid_name_str[OID_STR_MAX];
637 const char *syntax_name = 0;
639 if (preferredRecordSyntax)
641 if (!oid_oidcmp(preferredRecordSyntax, yaz_oid_recsyn_xml)
642 && element_set_name &&
643 !strcmp(element_set_name, "pz2"))
645 if (b->sptr->request_syntax.length())
647 syntax_name = b->sptr->request_syntax.c_str();
648 enable_pz2_transform = true;
654 yaz_oid_to_string_buf(preferredRecordSyntax, 0, oid_name_str);
658 b->set_option("preferredRecordSyntax", syntax_name);
660 if (enable_pz2_transform)
662 element_set_name = "F";
663 if (b->sptr->element_set.length())
664 element_set_name = b->sptr->element_set.c_str();
667 b->set_option("elementSetName", element_set_name);
669 b->present(start, number_to_present, recs, error, addinfo);
674 for (i = 0; i < number_to_present; i++)
679 { // only return records if no error and at least one record
680 char *odr_database = odr_strdup(odr,
681 b->m_frontend_database.c_str());
682 Z_NamePlusRecordList *npl = (Z_NamePlusRecordList *)
683 odr_malloc(odr, sizeof(*npl));
684 *number_of_records_returned = i;
685 npl->num_records = i;
686 npl->records = (Z_NamePlusRecord **)
687 odr_malloc(odr, i * sizeof(*npl->records));
688 for (i = 0; i < number_to_present; i++)
690 Z_NamePlusRecord *npr = 0;
692 int sur_error = ZOOM_record_error(recs[i], 0 /* msg */,
693 &addinfo, 0 /* diagset */);
697 npr = zget_surrogateDiagRec(odr, odr_database, sur_error,
700 else if (enable_pz2_transform)
702 char rec_type_str[100];
704 strcpy(rec_type_str, b->sptr->use_turbomarc ?
707 // prevent buffer overflow ...
708 if (b->sptr->record_encoding.length() > 0 &&
709 b->sptr->record_encoding.length() <
710 (sizeof(rec_type_str)-20))
712 strcat(rec_type_str, "; charset=");
713 strcat(rec_type_str, b->sptr->record_encoding.c_str());
717 const char *rec_buf = ZOOM_record_get(recs[i], rec_type_str,
719 if (rec_buf && b->xsp)
721 xmlDoc *rec_doc = xmlParseMemory(rec_buf, rec_len);
725 rec_res = xsltApplyStylesheet(b->xsp, rec_doc, 0);
728 xsltSaveResultToString((xmlChar **) &rec_buf, &rec_len,
735 npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
736 npr->databaseName = odr_database;
737 npr->which = Z_NamePlusRecord_databaseRecord;
738 npr->u.databaseRecord =
739 z_ext_record_xml(odr, rec_buf, rec_len);
743 npr = zget_surrogateDiagRec(
745 YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
752 (Z_External *) ZOOM_record_get(recs[i], "ext", 0);
755 npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
756 npr->databaseName = odr_database;
757 npr->which = Z_NamePlusRecord_databaseRecord;
758 npr->u.databaseRecord = ext;
762 npr = zget_surrogateDiagRec(
764 YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS,
765 "ZOOM_record, type ext");
768 npl->records[i] = npr;
770 records = (Z_Records*) odr_malloc(odr, sizeof(*records));
771 records->which = Z_Records_DBOSD;
772 records->u.databaseOrSurDiagnostics = npl;
777 struct cql_node *yf::Zoom::Impl::convert_cql_fields(struct cql_node *cn,
780 struct cql_node *r = 0;
788 std::map<std::string,std::string>::const_iterator it;
789 it = fieldmap.find(cn->u.st.index);
790 if (it == fieldmap.end())
792 if (it->second.length())
793 cn->u.st.index = odr_strdup(odr, it->second.c_str());
799 r = convert_cql_fields(cn->u.boolean.left, odr);
801 r = convert_cql_fields(cn->u.boolean.right, odr);
804 r = convert_cql_fields(cn->u.sort.search, odr);
810 void yf::Zoom::Frontend::handle_search(mp::Package &package)
812 Z_GDU *gdu = package.request().get();
813 Z_APDU *apdu_req = gdu->u.z3950;
814 Z_APDU *apdu_res = 0;
816 Z_SearchRequest *sr = apdu_req->u.searchRequest;
817 if (sr->num_databaseNames != 1)
819 apdu_res = odr.create_searchResponse(
820 apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
821 package.response() = apdu_res;
826 const char *addinfo = 0;
827 std::string db(sr->databaseNames[0]);
828 BackendPtr b = get_backend_from_databases(db, &error, &addinfo);
832 odr.create_searchResponse(
833 apdu_req, error, addinfo);
834 package.response() = apdu_res;
838 b->set_option("setname", "default");
841 Z_Query *query = sr->query;
845 if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
848 pqf_wrbuf = wrbuf_alloc();
849 yaz_rpnquery_to_wrbuf(pqf_wrbuf, query->u.type_1);
851 else if (query->which == Z_Query_type_2)
854 ccl_wrbuf = wrbuf_alloc();
855 wrbuf_write(ccl_wrbuf, (const char *) query->u.type_2->buf,
856 query->u.type_2->len);
858 else if (query->which == Z_Query_type_104 &&
859 query->u.type_104->which == Z_External_CQL)
862 const char *cql = query->u.type_104->u.cql;
863 CQL_parser cp = cql_parser_create();
864 int r = cql_parser_string(cp, cql);
867 cql_parser_destroy(cp);
869 odr.create_searchResponse(apdu_req,
870 YAZ_BIB1_MALFORMED_QUERY,
872 package.response() = apdu_res;
875 struct cql_node *cn = cql_parser_result(cp);
876 struct cql_node *cn_error = m_p->convert_cql_fields(cn, odr);
879 // hopefully we are getting a ptr to a index+relation+term node
881 if (cn_error->which == CQL_NODE_ST)
882 addinfo = cn_error->u.st.index;
885 odr.create_searchResponse(apdu_req,
886 YAZ_BIB1_UNSUPP_USE_ATTRIBUTE,
888 package.response() = apdu_res;
893 r = cql_to_ccl_buf(cn, ccl_buf, sizeof(ccl_buf));
896 ccl_wrbuf = wrbuf_alloc();
897 wrbuf_puts(ccl_wrbuf, ccl_buf);
899 cql_parser_destroy(cp);
903 odr.create_searchResponse(apdu_req,
904 YAZ_BIB1_MALFORMED_QUERY,
905 "CQL to CCL conversion error");
906 package.response() = apdu_res;
913 odr.create_searchResponse(apdu_req, YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
914 package.response() = apdu_res;
921 assert(pqf_wrbuf == 0);
923 struct ccl_rpn_node *cn;
924 yaz_log(YLOG_LOG, "CCL: %s", wrbuf_cstr(ccl_wrbuf));
925 cn = ccl_find_str(b->sptr->ccl_bibset, wrbuf_cstr(ccl_wrbuf),
927 wrbuf_destroy(ccl_wrbuf);
930 char *addinfo = odr_strdup(odr, ccl_err_msg(cerror));
931 int z3950_diag = YAZ_BIB1_MALFORMED_QUERY;
935 case CCL_ERR_UNKNOWN_QUAL:
936 z3950_diag = YAZ_BIB1_UNSUPP_USE_ATTRIBUTE;
938 case CCL_ERR_TRUNC_NOT_LEFT:
939 case CCL_ERR_TRUNC_NOT_RIGHT:
940 case CCL_ERR_TRUNC_NOT_BOTH:
941 z3950_diag = YAZ_BIB1_UNSUPP_TRUNCATION_ATTRIBUTE;
945 odr.create_searchResponse(apdu_req, z3950_diag, addinfo);
946 package.response() = apdu_res;
949 pqf_wrbuf = wrbuf_alloc();
950 ccl_pquery(pqf_wrbuf, cn);
955 if (b->get_option("sru"))
957 cql_transform_t cqlt = cql_transform_create();
959 WRBUF wrb = wrbuf_alloc();
962 zquery = p_query_rpn(odr, wrbuf_cstr(pqf_wrbuf));
963 status = cql_transform_rpn2cql_wrbuf(cqlt, wrb, zquery);
965 cql_transform_close(cqlt);
969 yaz_log(YLOG_LOG, "search CQL: %s", wrbuf_cstr(wrb));
970 b->search_cql(wrbuf_cstr(wrb), &hits, &error, &addinfo);
974 wrbuf_destroy(pqf_wrbuf);
978 odr.create_searchResponse(apdu_req, YAZ_BIB1_MALFORMED_QUERY,
979 "can not convert from RPN to CQL");
980 package.response() = apdu_res;
986 yaz_log(YLOG_LOG, "search PQF: %s", wrbuf_cstr(pqf_wrbuf));
987 b->search_pqf(wrbuf_cstr(pqf_wrbuf), &hits, &error, &addinfo);
988 wrbuf_destroy(pqf_wrbuf);
992 const char *element_set_name = 0;
993 Odr_int number_to_present = 0;
995 mp::util::piggyback_sr(sr, hits, number_to_present, &element_set_name);
997 Odr_int number_of_records_returned = 0;
998 Z_Records *records = get_records(
999 0, number_to_present, &error, &addinfo,
1000 &number_of_records_returned, odr, b, sr->preferredRecordSyntax,
1002 apdu_res = odr.create_searchResponse(apdu_req, error, addinfo);
1005 apdu_res->u.searchResponse->records = records;
1006 apdu_res->u.searchResponse->numberOfRecordsReturned =
1007 odr_intdup(odr, number_of_records_returned);
1009 apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
1010 package.response() = apdu_res;
1013 void yf::Zoom::Frontend::handle_present(mp::Package &package)
1015 Z_GDU *gdu = package.request().get();
1016 Z_APDU *apdu_req = gdu->u.z3950;
1017 Z_APDU *apdu_res = 0;
1018 Z_PresentRequest *pr = apdu_req->u.presentRequest;
1023 package.response() = odr.create_presentResponse(
1024 apdu_req, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST, 0);
1027 const char *element_set_name = 0;
1028 Z_RecordComposition *comp = pr->recordComposition;
1029 if (comp && comp->which != Z_RecordComp_simple)
1031 package.response() = odr.create_presentResponse(
1033 YAZ_BIB1_PRESENT_COMP_SPEC_PARAMETER_UNSUPP, 0);
1036 if (comp && comp->u.simple->which == Z_ElementSetNames_generic)
1037 element_set_name = comp->u.simple->u.generic;
1038 Odr_int number_of_records_returned = 0;
1040 const char *addinfo = 0;
1041 Z_Records *records = get_records(
1042 *pr->resultSetStartPoint - 1, *pr->numberOfRecordsRequested,
1043 &error, &addinfo, &number_of_records_returned, odr, m_backend,
1044 pr->preferredRecordSyntax, element_set_name);
1046 apdu_res = odr.create_presentResponse(apdu_req, error, addinfo);
1049 apdu_res->u.presentResponse->records = records;
1050 apdu_res->u.presentResponse->numberOfRecordsReturned =
1051 odr_intdup(odr, number_of_records_returned);
1053 package.response() = apdu_res;
1056 void yf::Zoom::Frontend::handle_package(mp::Package &package)
1058 Z_GDU *gdu = package.request().get();
1061 else if (gdu->which == Z_GDU_Z3950)
1063 Z_APDU *apdu_req = gdu->u.z3950;
1064 if (apdu_req->which == Z_APDU_initRequest)
1067 package.response() = odr.create_close(
1069 Z_Close_protocolError,
1072 else if (apdu_req->which == Z_APDU_searchRequest)
1074 handle_search(package);
1076 else if (apdu_req->which == Z_APDU_presentRequest)
1078 handle_present(package);
1083 package.response() = odr.create_close(
1085 Z_Close_protocolError,
1086 "zoom filter cannot handle this APDU");
1087 package.session().close();
1092 package.session().close();
1096 void yf::Zoom::Impl::process(mp::Package &package)
1098 FrontendPtr f = get_frontend(package);
1099 Z_GDU *gdu = package.request().get();
1101 if (f->m_is_virtual)
1103 f->handle_package(package);
1105 else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
1108 Z_InitRequest *req = gdu->u.z3950->u.initRequest;
1109 f->m_init_gdu = gdu;
1112 Z_APDU *apdu = odr.create_initResponse(gdu->u.z3950, 0, 0);
1113 Z_InitResponse *resp = apdu->u.initResponse;
1116 static const int masks[] = {
1121 for (i = 0; masks[i] != -1; i++)
1122 if (ODR_MASK_GET(req->options, masks[i]))
1123 ODR_MASK_SET(resp->options, masks[i]);
1125 static const int versions[] = {
1126 Z_ProtocolVersion_1,
1127 Z_ProtocolVersion_2,
1128 Z_ProtocolVersion_3,
1131 for (i = 0; versions[i] != -1; i++)
1132 if (ODR_MASK_GET(req->protocolVersion, versions[i]))
1133 ODR_MASK_SET(resp->protocolVersion, versions[i]);
1137 *resp->preferredMessageSize = *req->preferredMessageSize;
1138 *resp->maximumRecordSize = *req->maximumRecordSize;
1140 package.response() = apdu;
1141 f->m_is_virtual = true;
1146 release_frontend(package);
1150 static mp::filter::Base* filter_creator()
1152 return new mp::filter::Zoom;
1156 struct metaproxy_1_filter_struct metaproxy_1_filter_zoom = {
1167 * c-file-style: "Stroustrup"
1168 * indent-tabs-mode: nil
1170 * vim: shiftwidth=4 tabstop=8 expandtab