* See the file LICENSE for details.
*
* $Log: yaz-z-server.cpp,v $
- * Revision 1.1 2000-09-08 10:23:42 adam
+ * Revision 1.4 2000-10-11 11:58:17 adam
+ * Moved header files to include/yaz++. Switched to libtool and automake.
+ * Configure script creates yaz++-config script.
+ *
+ * Revision 1.3 2000/09/21 21:43:20 adam
+ * Better high-level server API.
+ *
+ * Revision 1.2 2000/09/12 12:09:53 adam
+ * More work on high-level server.
+ *
+ * Revision 1.1 2000/09/08 10:23:42 adam
* Added skeleton of yaz-z-server.
*
*/
#include <yaz/log.h>
-#include <yaz-z-server.h>
+#include <yaz++/yaz-z-server.h>
Yaz_Z_Server::Yaz_Z_Server(IYaz_PDU_Observable *the_PDU_Observable)
: Yaz_Z_Assoc(the_PDU_Observable)
{
- m_no = 0;
}
-void Yaz_Z_Server::recv_Z_PDU (Z_APDU *apdu)
+/*
+ * database record.
+ */
+void Yaz_Z_Server::create_databaseRecord (
+ Z_NamePlusRecord *rec, const char *dbname, int format, const void *buf, int len)
+{
+ rec->databaseName = dbname ? odr_strdup (odr_encode(), dbname) : 0;
+ rec->which = Z_NamePlusRecord_databaseRecord;
+ rec->u.databaseRecord = z_ext_record (odr_encode(), format,
+ (const char *) buf, len);
+}
+
+/*
+ * surrogate diagnostic.
+ */
+void Yaz_Z_Server::create_surrogateDiagnostics(
+ Z_NamePlusRecord *rec, const char *dbname, int error, char *const addinfo)
+{
+ int oid[OID_SIZE];
+ int *err = (int *)odr_malloc (odr_encode(), sizeof(*err));
+ oident bib1;
+ Z_DiagRec *drec = (Z_DiagRec *)odr_malloc (odr_encode(), sizeof(*drec));
+ Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
+ odr_malloc (odr_encode(), sizeof(*dr));
+
+ bib1.proto = PROTO_Z3950;
+ bib1.oclass = CLASS_DIAGSET;
+ bib1.value = VAL_BIB1;
+
+ yaz_log(LOG_DEBUG, "SurrogateDiagnotic: %d -- %s", error, addinfo);
+ *err = error;
+ rec->databaseName = dbname ? odr_strdup (odr_encode(), dbname) : 0;
+ rec->which = Z_NamePlusRecord_surrogateDiagnostic;
+ rec->u.surrogateDiagnostic = drec;
+ drec->which = Z_DiagRec_defaultFormat;
+ drec->u.defaultFormat = dr;
+ dr->diagnosticSetId = odr_oiddup (odr_encode(),
+ oid_ent_to_oid(&bib1, oid));
+ dr->condition = err;
+ dr->which = Z_DefaultDiagFormat_v2Addinfo;
+ dr->u.v2Addinfo = odr_strdup (odr_encode(), addinfo ? addinfo : "");
+}
+
+Z_Records *Yaz_Z_Server::create_nonSurrogateDiagnostics (
+ int error, const char *addinfo)
+{
+ int oid[OID_SIZE];
+ Z_Records *rec = (Z_Records *)
+ odr_malloc (odr_encode(), sizeof(*rec));
+ oident bib1;
+ int *err = (int *)
+ odr_malloc (odr_encode(), sizeof(*err));
+ Z_DiagRec *drec = (Z_DiagRec *)
+ odr_malloc (odr_encode(), sizeof(*drec));
+ Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
+ odr_malloc (odr_encode(), sizeof(*dr));
+
+ bib1.proto = PROTO_Z3950;
+ bib1.oclass = CLASS_DIAGSET;
+ bib1.value = VAL_BIB1;
+
+ *err = error;
+ rec->which = Z_Records_NSD;
+ rec->u.nonSurrogateDiagnostic = dr;
+ dr->diagnosticSetId =
+ odr_oiddup (odr_encode(), oid_ent_to_oid(&bib1, oid));
+ dr->condition = err;
+ dr->which = Z_DefaultDiagFormat_v2Addinfo;
+ dr->u.v2Addinfo = odr_strdup (odr_encode(), addinfo ? addinfo : "");
+ return rec;
+}
+
+Z_Records *Yaz_Z_Server::pack_records (const char *resultSetName,
+ int start, int xnum,
+ Z_RecordComposition *comp,
+ int *next, int *pres,
+ int *format)
+{
+ int recno, total_length = 0, toget = xnum, dumped_records = 0;
+ Z_Records *records =
+ (Z_Records *) odr_malloc (odr_encode(), sizeof(*records));
+ Z_NamePlusRecordList *reclist =
+ (Z_NamePlusRecordList *) odr_malloc (odr_encode(), sizeof(*reclist));
+ Z_NamePlusRecord **list =
+ (Z_NamePlusRecord **) odr_malloc (odr_encode(), sizeof(*list) * toget);
+
+ records->which = Z_Records_DBOSD;
+ records->u.databaseOrSurDiagnostics = reclist;
+ reclist->num_records = 0;
+ reclist->records = list;
+ *pres = Z_PRES_SUCCESS;
+ *next = 0;
+
+ yaz_log(LOG_LOG, "Request to pack %d+%d", start, toget);
+ yaz_log(LOG_LOG, "pms=%d, mrs=%d", m_preferredMessageSize,
+ m_maximumRecordSize);
+ for (recno = start; reclist->num_records < toget; recno++)
+ {
+ Z_NamePlusRecord *this_rec =
+ (Z_NamePlusRecord *) odr_malloc (odr_encode(), sizeof(*this_rec));
+ this_rec->databaseName = 0;
+ this_rec->which = Z_NamePlusRecord_databaseRecord;
+ this_rec->u.databaseRecord = 0;
+
+ int this_length = 0;
+
+ recv_Z_record (resultSetName, recno, format, comp, this_rec, records);
+
+ if (records->which != Z_Records_DBOSD)
+ {
+ *pres = Z_PRES_FAILURE;
+ return records;
+ }
+
+ if (this_rec->which == Z_NamePlusRecord_databaseRecord &&
+ this_rec->u.databaseRecord == 0)
+ { // handler did not return a record..
+ create_surrogateDiagnostics(this_rec, 0, 14, 0);
+ }
+ /*
+ * we get the number of bytes allocated on the stream before any
+ * allocation done by the backend - this should give us a reasonable
+ * idea of the total size of the data so far.
+ */
+ total_length = odr_total(odr_encode()) - dumped_records;
+ this_length = odr_total(odr_encode()) - total_length;
+ yaz_log(LOG_LOG, " fetched record, len=%d, total=%d",
+ this_length, total_length);
+ if (this_length + total_length > m_preferredMessageSize)
+ {
+ /* record is small enough, really */
+ if (this_length <= m_preferredMessageSize)
+ {
+ yaz_log(LOG_LOG, " Dropped last normal-sized record");
+ *pres = Z_PRES_PARTIAL_2;
+ break;
+ }
+ if (this_length >= m_maximumRecordSize)
+ { /* too big entirely */
+ yaz_log(LOG_LOG, "Record > maxrcdsz");
+ reclist->records[reclist->num_records] = this_rec;
+ create_surrogateDiagnostics(this_rec,
+ this_rec->databaseName, 17, 0);
+ reclist->num_records++;
+ *next = recno + 1;
+ dumped_records += this_length;
+ continue;
+ }
+ else /* record can only be fetched by itself */
+ {
+ yaz_log(LOG_LOG, " Record > prefmsgsz");
+ if (toget > 1)
+ {
+ yaz_log(LOG_DEBUG, " Dropped it");
+ reclist->records[reclist->num_records] = this_rec;
+ create_surrogateDiagnostics(this_rec,
+ this_rec->databaseName,
+ 16, 0);
+ reclist->num_records++;
+ // *next = freq.last_in_set ? 0 : recno + 1;
+ *next = recno + 1;
+ dumped_records += this_length;
+ continue;
+ }
+ }
+ }
+ reclist->records[reclist->num_records] = this_rec;
+ reclist->num_records++;
+ *next = recno + 1;
+ }
+ return records;
+}
+
+void Yaz_Z_Server::fetch_via_piggyback (Z_SearchRequest *req,
+ Z_SearchResponse *res)
+{
+ bool_t *sr = (bool_t *)odr_malloc (odr_encode(), sizeof(*sr));
+ *sr = 1;
+
+ int toget = 0;
+
+ Z_RecordComposition comp, *compp = 0;
+ int hits = *res->resultCount;
+
+ int *nulint = (int *)odr_malloc (odr_encode(), sizeof(*nulint));
+ *nulint = 0;
+
+ comp.which = Z_RecordComp_simple;
+ /* how many records does the user agent want, then? */
+ if (hits <= *req->smallSetUpperBound)
+ {
+ toget = hits;
+ if ((comp.u.simple = req->smallSetElementSetNames))
+ compp = ∁
+ }
+ else if (hits < *req->largeSetLowerBound)
+ {
+ toget = *req->mediumSetPresentNumber;
+ if (toget > hits)
+ toget = hits;
+ if ((comp.u.simple = req->mediumSetElementSetNames))
+ compp = ∁
+ }
+
+ if (toget && !res->records)
+ {
+ res->presentStatus = (int *) odr_malloc (odr_encode(), sizeof(int));
+ *res->presentStatus = Z_PRES_SUCCESS;
+ res->records =
+ pack_records(req->resultSetName, 1, toget, compp,
+ res->nextResultSetPosition,
+ res->presentStatus,
+ req->preferredRecordSyntax);
+ if (!res->records)
+ return;
+ if (res->records->which == Z_Records_DBOSD)
+ *res->numberOfRecordsReturned =
+ res->records->u.databaseOrSurDiagnostics->num_records;
+ res->searchStatus = sr;
+ res->resultSetStatus = 0;
+ }
+ else
+ {
+ if (hits)
+ *res->nextResultSetPosition = 1;
+ res->numberOfRecordsReturned = nulint;
+ res->searchStatus = sr;
+ res->resultSetStatus = 0;
+ res->presentStatus = 0;
+ }
+}
+
+void Yaz_Z_Server::fetch_via_present (Z_PresentRequest *req,
+ Z_PresentResponse *res)
{
- logf (LOG_LOG, "recv_Z_PDU in Yaz_Z_Server");
+ res->records = pack_records (req->resultSetId,*req->resultSetStartPoint,
+ *req->numberOfRecordsRequested,
+ req->recordComposition,
+ res->nextResultSetPosition,
+ res->presentStatus,
+ req->preferredRecordSyntax);
+ if (res->records->which == Z_Records_DBOSD)
+ *res->numberOfRecordsReturned =
+ res->records->u.databaseOrSurDiagnostics->num_records;
+}
+
+void Yaz_Z_Server::recv_Z_PDU (Z_APDU *apdu_request)
+{
+ Z_APDU *apdu_response;
+ switch (apdu_request->which)
+ {
+ case Z_APDU_initRequest:
+ logf (LOG_LOG, "got InitRequest");
+ apdu_response = create_Z_PDU(Z_APDU_initResponse);
+ recv_Z_init (apdu_request->u.initRequest,
+ apdu_response->u.initResponse);
+ m_preferredMessageSize =
+ *apdu_request->u.initRequest->preferredMessageSize;
+ m_maximumRecordSize =
+ *apdu_request->u.initRequest->maximumRecordSize;
+ send_Z_PDU(apdu_response);
+ break;
+ case Z_APDU_searchRequest:
+ logf (LOG_LOG, "got SearchRequest");
+ apdu_response = create_Z_PDU(Z_APDU_searchResponse);
+ recv_Z_search (apdu_request->u.searchRequest,
+ apdu_response->u.searchResponse);
+ if (!apdu_response->u.searchResponse->records)
+ {
+ fetch_via_piggyback(apdu_request->u.searchRequest,
+ apdu_response->u.searchResponse);
+ }
+ send_Z_PDU(apdu_response);
+ break;
+ case Z_APDU_presentRequest:
+ logf (LOG_LOG, "got PresentRequest");
+ apdu_response = create_Z_PDU(Z_APDU_presentResponse);
+ recv_Z_present (apdu_request->u.presentRequest,
+ apdu_response->u.presentResponse);
+ if (!apdu_response->u.presentResponse->records)
+ fetch_via_present(apdu_request->u.presentRequest,
+ apdu_response->u.presentResponse);
+ send_Z_PDU(apdu_response);
+ break;
+ }
}
projects / yazpp-moved-to-github.git / blobdiff