* Sebastian Hammer, Adam Dickmeiss
*
* $Log: yaz-proxy.cpp,v $
- * Revision 1.5 1999-04-21 12:09:01 adam
+ * Revision 1.10 1999-11-10 10:02:34 adam
+ * Work on proxy.
+ *
+ * Revision 1.9 1999/09/13 12:53:44 adam
+ * Proxy removes OtherInfo Proxy Address and Session ID. Other
+ * Otherinfo remains untouched.
+ *
+ * Revision 1.8 1999/05/04 10:53:00 adam
+ * Changed the way the PROXY behaves when lost cookie is received.
+ *
+ * Revision 1.7 1999/04/28 13:31:17 adam
+ * Better result set optimisation for proxy.
+ *
+ * Revision 1.6 1999/04/27 07:52:13 adam
+ * Improved proxy; added query match for result set re-use.
+ *
+ * Revision 1.5 1999/04/21 12:09:01 adam
* Many improvements. Modified to proxy server to work with "sessions"
* based on cookies.
*
m_clientPool = 0;
m_seqno = 1;
m_keepalive = 1;
+ m_proxyTarget = 0;
}
Yaz_Proxy::~Yaz_Proxy()
{
+ xfree (m_proxyTarget);
+}
+
+
+void Yaz_Proxy::proxyTarget(const char *target)
+{
+ xfree (m_proxyTarget);
+ m_proxyTarget = 0;
+ if (target)
+ m_proxyTarget = (char *) xstrdup (target);
}
IYaz_PDU_Observer *Yaz_Proxy::clone(IYaz_PDU_Observable
assert (oid_ent_to_oid (&ent, oid));
if (oid_ent_to_oid (&ent, oid) &&
- (oi = update_otherInformation(otherInfo, 0, oid, 1)) &&
+ (oi = update_otherInformation(otherInfo, 0, oid, 1, 1)) &&
oi->which == Z_OtherInfo_characterInfo)
return oi->information.characterInfo;
return 0;
ent.oclass = CLASS_USERINFO;
ent.value = (oid_value) VAL_PROXY;
if (oid_ent_to_oid (&ent, oid) &&
- (oi = update_otherInformation(otherInfo, 0, oid, 1)) &&
+ (oi = update_otherInformation(otherInfo, 0, oid, 1, 1)) &&
oi->which == Z_OtherInfo_characterInfo)
return oi->information.characterInfo;
return 0;
get_otherInfoAPDU(apdu, &oi);
char *cookie = get_cookie(oi);
logf (LOG_LOG, "Yaz_Proxy::get_client cookie=%s", cookie ? cookie :
- "<null>");
+ "null");
if (cookie)
{
for (c = parent->m_clientPool; c; c = c->m_next)
if (!strcmp(cookie,c->m_cookie))
{
logf (LOG_LOG, "Yaz_Proxy::get_client cached");
- break;
+ return c;
}
}
+
}
- else if (!m_client)
+ if (!m_client)
{
+ const char *proxy_host = 0;
+ if (apdu->which == Z_APDU_initRequest)
+ {
+ logf (LOG_LOG, "got InitRequest");
+
+ char *proxy_host = get_proxy(&apdu->u.initRequest->otherInfo);
+ if (!proxy_host)
+ proxy_host = m_proxyTarget;
+ if (!proxy_host)
+ return 0;
+ }
logf (LOG_LOG, "Yaz_Proxy::get_client creating new");
c = new Yaz_ProxyClient(m_PDU_Observable->clone());
c->m_next = parent->m_clientPool;
{
logf (LOG_LOG, "got InitRequest");
- char *proxy_host = get_proxy(&apdu->u.initRequest->otherInfo);
- if (proxy_host)
- c->client(proxy_host);
- else
- c->client("localhost:9999");
+ c->client(proxy_host);
}
c->timeout(600);
}
return c;
}
+Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
+{
+ if (apdu->which != Z_APDU_searchRequest)
+ return apdu;
+ Z_SearchRequest *sr = apdu->u.searchRequest;
+ Yaz_Z_Query *this_query = new Yaz_Z_Query;
+
+ this_query->set_Z_Query(sr->query);
+
+ if (m_client->m_last_query &&
+ m_client->m_last_query->match(this_query))
+ {
+ delete this_query;
+ if (m_client->m_last_resultCount > *sr->smallSetUpperBound &&
+ m_client->m_last_resultCount < *sr->largeSetLowerBound)
+ {
+ // medium Set
+ Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
+ Z_PresentRequest *pr = new_apdu->u.presentRequest;
+ pr->referenceId = sr->referenceId;
+ pr->resultSetId = sr->resultSetName;
+ pr->preferredRecordSyntax = sr->preferredRecordSyntax;
+ *pr->numberOfRecordsRequested = *sr->mediumSetPresentNumber;
+ if (sr->mediumSetElementSetNames)
+ {
+ pr->recordComposition = (Z_RecordComposition *)
+ odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
+ pr->recordComposition->which = Z_RecordComp_simple;
+ pr->recordComposition->u.simple = sr->mediumSetElementSetNames;
+ }
+ m_client->m_sr_transform = 1;
+ return new_apdu;
+ }
+ else if (m_client->m_last_resultCount >= *sr->largeSetLowerBound ||
+ m_client->m_last_resultCount == 0)
+ {
+ // large set
+ Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
+ new_apdu->u.searchResponse->referenceId = sr->referenceId;
+ new_apdu->u.searchResponse->resultCount =
+ &m_client->m_last_resultCount;
+ send_Z_PDU(new_apdu);
+ return 0;
+ }
+ else
+ {
+ // small set
+ Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
+ Z_PresentRequest *pr = new_apdu->u.presentRequest;
+ pr->referenceId = sr->referenceId;
+ pr->resultSetId = sr->resultSetName;
+ pr->preferredRecordSyntax = sr->preferredRecordSyntax;
+ *pr->numberOfRecordsRequested = m_client->m_last_resultCount;
+ if (sr->smallSetElementSetNames)
+ {
+ pr->recordComposition = (Z_RecordComposition *)
+ odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
+ pr->recordComposition->which = Z_RecordComp_simple;
+ pr->recordComposition->u.simple = sr->smallSetElementSetNames;
+ }
+ m_client->m_sr_transform = 1;
+ return new_apdu;
+ }
+ }
+ else
+ {
+ logf (LOG_LOG, "query doesn't match");
+ delete m_client->m_last_query;
+ m_client->m_last_query = this_query;
+ }
+ return apdu;
+}
+
void Yaz_Proxy::recv_Z_PDU(Z_APDU *apdu)
{
logf (LOG_LOG, "Yaz_Proxy::recv_Z_PDU");
}
m_client->m_server = this;
+#if 0
Z_OtherInformation **oi;
get_otherInfoAPDU(apdu, &oi);
*oi = 0;
+#endif
+
+ if (apdu->which == Z_APDU_initRequest)
+ {
+ if (m_client->m_init_flag)
+ {
+ Z_APDU *apdu = create_Z_PDU(Z_APDU_initResponse);
+ if (m_client->m_cookie)
+ set_otherInformationString(apdu, VAL_COOKIE, 1,
+ m_client->m_cookie);
+ send_Z_PDU(apdu);
+ return;
+ }
+ m_client->m_init_flag = 1;
+ }
+ apdu = result_set_optimize(apdu);
+ if (!apdu)
+ return;
+
logf (LOG_LOG, "Yaz_ProxyClient::send_Z_PDU");
if (m_client->send_Z_PDU(apdu) < 0)
{
logf (LOG_LOG, "failNotity server");
if (m_keepalive)
{
- // Tell client (if any) that not server connection is there..
+ // Tell client (if any) that no server connection is there..
if (m_client)
m_client->m_server = 0;
}
if (m_next)
m_next->m_prev = m_prev;
}
+ delete m_last_query;
}
void Yaz_Proxy::timeoutNotify()
m_cookie[0] = 0;
m_next = 0;
m_prev = 0;
+ m_init_flag = 0;
+ m_last_query = 0;
+ m_last_resultCount = 0;
+ m_sr_transform = 0;
}
void Yaz_ProxyClient::recv_Z_PDU(Z_APDU *apdu)
{
logf (LOG_LOG, "Yaz_ProxyClient::recv_Z_PDU");
+ if (apdu->which == Z_APDU_searchResponse)
+ m_last_resultCount = *apdu->u.searchResponse->resultCount;
+ if (apdu->which == Z_APDU_presentResponse && m_sr_transform)
+ {
+ m_sr_transform = 0;
+ Z_PresentResponse *pr = apdu->u.presentResponse;
+ Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
+ Z_SearchResponse *sr = new_apdu->u.searchResponse;
+ sr->referenceId = pr->referenceId;
+ *sr->resultCount = m_last_resultCount;
+ sr->records = pr->records;
+ sr->nextResultSetPosition = pr->nextResultSetPosition;
+ sr->numberOfRecordsReturned = pr->numberOfRecordsReturned;
+ apdu = new_apdu;
+ }
if (m_cookie)
set_otherInformationString (apdu, VAL_COOKIE, 1, m_cookie);
if (m_server)
projects / yazpp-moved-to-github.git / blobdiff