#include <yaz/zoom.h>
#include <metaproxy/package.hpp>
#include <metaproxy/util.hpp>
+#include "torus.hpp"
#include <boost/thread/mutex.hpp>
#include <boost/thread/condition.hpp>
-
+#include <yaz/oid_db.h>
+#include <yaz/diagbib1.h>
+#include <yaz/log.h>
#include <yaz/zgdu.h>
+#include <yaz/querytowrbuf.h>
namespace mp = metaproxy_1;
namespace yf = mp::filter;
namespace metaproxy_1 {
namespace filter {
+ struct Zoom::Searchable {
+ std::string database;
+ std::string target;
+ std::string query_encoding;
+ std::string sru;
+ bool piggyback;
+ Searchable();
+ ~Searchable();
+ };
class Zoom::Backend {
friend class Impl;
+ friend class Frontend;
std::string zurl;
ZOOM_connection m_connection;
ZOOM_resultset m_resultset;
+ std::string m_frontend_database;
+ public:
+ Backend();
+ ~Backend();
+ void connect(std::string zurl, int *error, const char **addinfo);
+ void search_pqf(const char *pqf, Odr_int *hits,
+ int *error, const char **addinfo);
+ void present(Odr_int start, Odr_int number, ZOOM_record *recs,
+ int *error, const char **addinfo);
+ void set_option(const char *name, const char *value);
+ int get_error(const char **addinfo);
};
class Zoom::Frontend {
friend class Impl;
bool m_is_virtual;
bool m_in_use;
yazpp_1::GDU m_init_gdu;
+ BackendPtr m_backend;
+ void handle_package(mp::Package &package);
+ void handle_search(mp::Package &package);
+ void handle_present(mp::Package &package);
+ BackendPtr get_backend_from_databases(std::string &database,
+ int *error,
+ const char **addinfo);
+ Z_Records *get_records(Odr_int start,
+ Odr_int number_to_present,
+ int *error,
+ const char **addinfo,
+ Odr_int *number_of_records_returned,
+ ODR odr, BackendPtr b,
+ Odr_oid *preferredRecordSyntax,
+ const char *element_set_name);
public:
Frontend(Impl *impl);
~Frontend();
};
class Zoom::Impl {
+ friend class Frontend;
public:
Impl();
~Impl();
void process(metaproxy_1::Package & package);
- void configure(const xmlNode * ptr);
+ void configure(const xmlNode * ptr, bool test_only);
private:
FrontendPtr get_frontend(mp::Package &package);
void release_frontend(mp::Package &package);
+ void parse_torus(const xmlNode *ptr);
+
+ std::list<Zoom::Searchable>m_searchables;
std::map<mp::Session, FrontendPtr> m_clients;
boost::mutex m_mutex;
boost::condition m_cond_session_ready;
+ mp::Torus torus;
};
}
}
void yf::Zoom::configure(const xmlNode *xmlnode, bool test_only)
{
- m_p->configure(xmlnode);
+ m_p->configure(xmlnode, test_only);
}
void yf::Zoom::process(mp::Package &package) const
// define Implementation stuff
+yf::Zoom::Backend::Backend()
+{
+ m_connection = ZOOM_connection_create(0);
+ m_resultset = 0;
+}
+
+yf::Zoom::Backend::~Backend()
+{
+ ZOOM_connection_destroy(m_connection);
+ ZOOM_resultset_destroy(m_resultset);
+}
+
+void yf::Zoom::Backend::connect(std::string zurl,
+ int *error, const char **addinfo)
+{
+ ZOOM_connection_connect(m_connection, zurl.c_str(), 0);
+ *error = ZOOM_connection_error(m_connection, 0, addinfo);
+}
+
+void yf::Zoom::Backend::search_pqf(const char *pqf, Odr_int *hits,
+ int *error, const char **addinfo)
+{
+ m_resultset = ZOOM_connection_search_pqf(m_connection, pqf);
+ *error = ZOOM_connection_error(m_connection, 0, addinfo);
+ if (*error == 0)
+ *hits = ZOOM_resultset_size(m_resultset);
+ else
+ *hits = 0;
+}
+
+void yf::Zoom::Backend::present(Odr_int start, Odr_int number,
+ ZOOM_record *recs,
+ int *error, const char **addinfo)
+{
+ ZOOM_resultset_records(m_resultset, recs, start, number);
+ *error = ZOOM_connection_error(m_connection, 0, addinfo);
+}
+
+void yf::Zoom::Backend::set_option(const char *name, const char *value)
+{
+ ZOOM_connection_option_set(m_connection, name, value);
+ if (m_resultset)
+ ZOOM_resultset_option_set(m_resultset, name, value);
+}
+
+int yf::Zoom::Backend::get_error(const char **addinfo)
+{
+ return ZOOM_connection_error(m_connection, 0, addinfo);
+}
+
+yf::Zoom::Searchable::Searchable()
+{
+ piggyback = true;
+}
+
+yf::Zoom::Searchable::~Searchable()
+{
+}
+
yf::Zoom::Frontend::Frontend(Impl *impl) :
m_p(impl), m_is_virtual(false), m_in_use(true)
{
{
}
-void yf::Zoom::Impl::configure(const xmlNode *xmlnode)
+void yf::Zoom::Impl::parse_torus(const xmlNode *ptr1)
{
+ if (!ptr1)
+ return ;
+ for (ptr1 = ptr1->children; ptr1; ptr1 = ptr1->next)
+ {
+ if (ptr1->type != XML_ELEMENT_NODE)
+ continue;
+ if (!strcmp((const char *) ptr1->name, "record"))
+ {
+ const xmlNode *ptr2 = ptr1;
+ for (ptr2 = ptr2->children; ptr2; ptr2 = ptr2->next)
+ {
+ if (ptr2->type != XML_ELEMENT_NODE)
+ continue;
+ if (!strcmp((const char *) ptr2->name, "layer"))
+ {
+ Zoom::Searchable s;
+
+ const xmlNode *ptr3 = ptr2;
+ for (ptr3 = ptr3->children; ptr3; ptr3 = ptr3->next)
+ {
+ if (ptr3->type != XML_ELEMENT_NODE)
+ continue;
+ if (!strcmp((const char *) ptr3->name, "id"))
+ {
+ s.database = mp::xml::get_text(ptr3);
+ }
+ else if (!strcmp((const char *) ptr3->name, "zurl"))
+ {
+ s.target = mp::xml::get_text(ptr3);
+ }
+ else if (!strcmp((const char *) ptr3->name, "sru"))
+ {
+ s.sru = mp::xml::get_text(ptr3);
+ }
+ else if (!strcmp((const char *) ptr3->name,
+ "queryEncoding"))
+ {
+ s.query_encoding = mp::xml::get_text(ptr3);
+ }
+ else if (!strcmp((const char *) ptr3->name,
+ "piggyback"))
+ {
+ s.piggyback = mp::xml::get_bool(ptr3, true);
+ }
+ }
+ if (s.database.length() && s.target.length())
+ {
+ yaz_log(YLOG_LOG, "add db=%s target=%s",
+ s.database.c_str(), s.target.c_str());
+ m_searchables.push_back(s);
+ }
+ }
+ }
+ }
+ }
}
-void yf::Zoom::Impl::process(mp::Package &package)
+
+void yf::Zoom::Impl::configure(const xmlNode *ptr, bool test_only)
+{
+ for (ptr = ptr->children; ptr; ptr = ptr->next)
+ {
+ if (ptr->type != XML_ELEMENT_NODE)
+ continue;
+ if (!strcmp((const char *) ptr->name, "records"))
+ {
+ parse_torus(ptr);
+ }
+ else if (!strcmp((const char *) ptr->name, "torus"))
+ {
+ std::string url;
+ const struct _xmlAttr *attr;
+ for (attr = ptr->properties; attr; attr = attr->next)
+ {
+ if (!strcmp((const char *) attr->name, "url"))
+ url = mp::xml::get_text(attr->children);
+ else
+ throw mp::filter::FilterException(
+ "Bad attribute " + std::string((const char *)
+ attr->name));
+ }
+ torus.read_searchables(url);
+ xmlDoc *doc = torus.get_doc();
+ if (doc)
+ {
+ xmlNode *ptr = xmlDocGetRootElement(doc);
+ parse_torus(ptr);
+ }
+ }
+ else
+ {
+ throw mp::filter::FilterException
+ ("Bad element "
+ + std::string((const char *) ptr->name)
+ + " in zoom filter");
+ }
+ }
+}
+
+yf::Zoom::BackendPtr yf::Zoom::Frontend::get_backend_from_databases(
+ std::string &database, int *error, const char **addinfo)
+{
+ std::list<BackendPtr>::const_iterator map_it;
+ if (m_backend && m_backend->m_frontend_database == database)
+ return m_backend;
+
+ std::list<Zoom::Searchable>::iterator map_s =
+ m_p->m_searchables.begin();
+
+ std::string c_db = mp::util::database_name_normalize(database);
+
+ while (map_s != m_p->m_searchables.end())
+ {
+ if (c_db.compare(map_s->database) == 0)
+ break;
+ map_s++;
+ }
+ if (map_s == m_p->m_searchables.end())
+ {
+ *error = YAZ_BIB1_DATABASE_DOES_NOT_EXIST;
+ *addinfo = database.c_str();
+ BackendPtr b;
+ return b;
+ }
+
+ m_backend.reset();
+
+ BackendPtr b(new Backend);
+
+ b->m_frontend_database = database;
+
+ if (map_s->query_encoding.length())
+ b->set_option("rpnCharset", map_s->query_encoding.c_str());
+
+ std::string url;
+ if (map_s->sru.length())
+ {
+ url = "http://" + map_s->target;
+ b->set_option("sru", map_s->sru.c_str());
+ }
+ else
+ url = map_s->target;
+
+ b->connect(url, error, addinfo);
+ if (*error == 0)
+ {
+ m_backend = b;
+ }
+ return b;
+}
+
+Z_Records *yf::Zoom::Frontend::get_records(Odr_int start,
+ Odr_int number_to_present,
+ int *error,
+ const char **addinfo,
+ Odr_int *number_of_records_returned,
+ ODR odr,
+ BackendPtr b,
+ Odr_oid *preferredRecordSyntax,
+ const char *element_set_name)
+{
+ *number_of_records_returned = 0;
+ Z_Records *records = 0;
+
+ if (start < 0 || number_to_present <= 0)
+ return records;
+
+ if (number_to_present > 10000)
+ number_to_present = 10000;
+
+ ZOOM_record *recs = (ZOOM_record *)
+ odr_malloc(odr, number_to_present * sizeof(*recs));
+
+ char oid_name_str[OID_STR_MAX];
+ const char *syntax_name = 0;
+
+ if (preferredRecordSyntax)
+ syntax_name =
+ yaz_oid_to_string_buf(preferredRecordSyntax, 0, oid_name_str);
+ b->set_option("preferredRecordSyntax", syntax_name);
+
+ b->set_option("elementSetName", element_set_name);
+
+ b->present(start, number_to_present, recs, error, addinfo);
+
+ Odr_int i = 0;
+ if (!*error)
+ {
+ for (i = 0; i < number_to_present; i++)
+ if (!recs[i])
+ break;
+ }
+ if (i > 0)
+ { // only return records if no error and at least one record
+ char *odr_database = odr_strdup(odr,
+ b->m_frontend_database.c_str());
+ Z_NamePlusRecordList *npl = (Z_NamePlusRecordList *)
+ odr_malloc(odr, sizeof(*npl));
+ *number_of_records_returned = i;
+ npl->num_records = i;
+ npl->records = (Z_NamePlusRecord **)
+ odr_malloc(odr, i * sizeof(*npl->records));
+ for (i = 0; i < number_to_present; i++)
+ {
+ Z_NamePlusRecord *npr = 0;
+ const char *addinfo;
+ int sur_error = ZOOM_record_error(recs[i], 0 /* msg */,
+ &addinfo, 0 /* diagset */);
+
+ if (sur_error)
+ {
+ npr = zget_surrogateDiagRec(odr, odr_database, sur_error,
+ addinfo);
+ }
+ else
+ {
+ npr = (Z_NamePlusRecord *) odr_malloc(odr, sizeof(*npr));
+ Z_External *ext =
+ (Z_External *) ZOOM_record_get(recs[i], "ext", 0);
+ npr->databaseName = odr_database;
+ if (ext)
+ {
+ npr->which = Z_NamePlusRecord_databaseRecord;
+ npr->u.databaseRecord = ext;
+ }
+ }
+ npl->records[i] = npr;
+ }
+ records = (Z_Records*) odr_malloc(odr, sizeof(*records));
+ records->which = Z_Records_DBOSD;
+ records->u.databaseOrSurDiagnostics = npl;
+ }
+ return records;
+}
+
+
+void yf::Zoom::Frontend::handle_search(mp::Package &package)
{
- FrontendPtr f = get_frontend(package);
Z_GDU *gdu = package.request().get();
+ Z_APDU *apdu_req = gdu->u.z3950;
+ Z_APDU *apdu_res = 0;
+ mp::odr odr;
+ Z_SearchRequest *sr = apdu_req->u.searchRequest;
+ if (sr->num_databaseNames != 1)
+ {
+ apdu_res = odr.create_searchResponse(
+ apdu_req, YAZ_BIB1_TOO_MANY_DATABASES_SPECIFIED, 0);
+ package.response() = apdu_res;
+ return;
+ }
- if (f->m_is_virtual)
+ int error = 0;
+ const char *addinfo = 0;
+ std::string db(sr->databaseNames[0]);
+ BackendPtr b = get_backend_from_databases(db, &error, &addinfo);
+ if (error)
+ {
+ apdu_res =
+ odr.create_searchResponse(
+ apdu_req, error, addinfo);
+ package.response() = apdu_res;
+ return;
+ }
+
+ b->set_option("setname", "default");
+
+ Odr_int hits = 0;
+ Z_Query *query = sr->query;
+ if (query->which == Z_Query_type_1 || query->which == Z_Query_type_101)
+ {
+ WRBUF w = wrbuf_alloc();
+ yaz_rpnquery_to_wrbuf(w, query->u.type_1);
+
+ b->search_pqf(wrbuf_cstr(w), &hits, &error, &addinfo);
+ wrbuf_destroy(w);
+ }
+ else
+ {
+ apdu_res =
+ odr.create_searchResponse(apdu_req, YAZ_BIB1_QUERY_TYPE_UNSUPP, 0);
+ package.response() = apdu_res;
+ return;
+ }
+
+ const char *element_set_name = 0;
+ Odr_int number_to_present = 0;
+ if (!error)
+ mp::util::piggyback_sr(sr, hits, number_to_present, &element_set_name);
+
+ Odr_int number_of_records_returned = 0;
+ Z_Records *records = get_records(
+ 0, number_to_present, &error, &addinfo,
+ &number_of_records_returned, odr, b, sr->preferredRecordSyntax,
+ element_set_name);
+ apdu_res = odr.create_searchResponse(apdu_req, error, addinfo);
+ if (records)
{
- if (gdu->which == Z_GDU_Z3950)
+ apdu_res->u.searchResponse->records = records;
+ apdu_res->u.searchResponse->numberOfRecordsReturned =
+ odr_intdup(odr, number_of_records_returned);
+ }
+ apdu_res->u.searchResponse->resultCount = odr_intdup(odr, hits);
+ package.response() = apdu_res;
+}
+
+void yf::Zoom::Frontend::handle_present(mp::Package &package)
+{
+ Z_GDU *gdu = package.request().get();
+ Z_APDU *apdu_req = gdu->u.z3950;
+ Z_APDU *apdu_res = 0;
+ Z_PresentRequest *pr = apdu_req->u.presentRequest;
+
+ mp::odr odr;
+ if (!m_backend)
+ {
+ package.response() = odr.create_presentResponse(
+ apdu_req, YAZ_BIB1_SPECIFIED_RESULT_SET_DOES_NOT_EXIST, 0);
+ return;
+ }
+ const char *element_set_name = 0;
+ Z_RecordComposition *comp = pr->recordComposition;
+ if (comp && comp->which != Z_RecordComp_simple)
+ {
+ package.response() = odr.create_presentResponse(
+ apdu_req,
+ YAZ_BIB1_PRESENT_COMP_SPEC_PARAMETER_UNSUPP, 0);
+ return;
+ }
+ if (comp && comp->u.simple->which == Z_ElementSetNames_generic)
+ element_set_name = comp->u.simple->u.generic;
+ Odr_int number_of_records_returned = 0;
+ int error = 0;
+ const char *addinfo = 0;
+ Z_Records *records = get_records(
+ *pr->resultSetStartPoint - 1, *pr->numberOfRecordsRequested,
+ &error, &addinfo, &number_of_records_returned, odr, m_backend,
+ pr->preferredRecordSyntax, element_set_name);
+
+ apdu_res = odr.create_presentResponse(apdu_req, error, addinfo);
+ if (records)
+ {
+ apdu_res->u.presentResponse->records = records;
+ apdu_res->u.presentResponse->numberOfRecordsReturned =
+ odr_intdup(odr, number_of_records_returned);
+ }
+ package.response() = apdu_res;
+}
+
+void yf::Zoom::Frontend::handle_package(mp::Package &package)
+{
+ Z_GDU *gdu = package.request().get();
+ if (!gdu)
+ ;
+ else if (gdu->which == Z_GDU_Z3950)
+ {
+ Z_APDU *apdu_req = gdu->u.z3950;
+ if (apdu_req->which == Z_APDU_initRequest)
+ {
+ mp::odr odr;
+ package.response() = odr.create_close(
+ apdu_req,
+ Z_Close_protocolError,
+ "double init");
+ }
+ else if (apdu_req->which == Z_APDU_searchRequest)
+ {
+ handle_search(package);
+ }
+ else if (apdu_req->which == Z_APDU_presentRequest)
+ {
+ handle_present(package);
+ }
+ else
{
- Z_APDU *apdu = gdu->u.z3950;
mp::odr odr;
-
package.response() = odr.create_close(
- apdu,
+ apdu_req,
Z_Close_protocolError,
- "not implemented");
+ "zoom filter cannot handle this APDU");
+ package.session().close();
}
+ }
+ else
+ {
package.session().close();
}
+}
+
+void yf::Zoom::Impl::process(mp::Package &package)
+{
+ FrontendPtr f = get_frontend(package);
+ Z_GDU *gdu = package.request().get();
+
+ if (f->m_is_virtual)
+ {
+ f->handle_package(package);
+ }
else if (gdu && gdu->which == Z_GDU_Z3950 && gdu->u.z3950->which ==
Z_APDU_initRequest)
{
projects / metaproxy-moved-to-github.git / blobdiff