/*
- * Copyright (c) 1998-2000, Index Data.
+ * Copyright (c) 1998-2003, Index Data.
* See the file LICENSE for details.
- * Sebastian Hammer, Adam Dickmeiss
*
- * $Log: yaz-proxy.cpp,v $
- * Revision 1.14 2000-08-10 08:42:42 adam
- * Fixes for {set,get}_APDU_log.
- *
- * Revision 1.13 2000/08/07 14:19:59 adam
- * Fixed serious bug regarding timeouts. Improved logging for proxy.
- *
- * Revision 1.12 2000/07/04 13:48:49 adam
- * Implemented upper-limit on proxy-to-target sessions.
- *
- * Revision 1.11 1999/12/06 13:52:45 adam
- * Modified for new location of YAZ header files. Experimental threaded
- * operation.
- *
- * 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.
- *
- * Revision 1.4 1999/04/20 10:30:05 adam
- * Implemented various stuff for client and proxy. Updated calls
- * to ODR to reflect new name parameter.
- *
- * Revision 1.3 1999/04/09 11:46:57 adam
- * Added object Yaz_Z_Assoc. Much more functional client.
- *
- * Revision 1.2 1999/01/28 13:08:46 adam
- * Yaz_PDU_Assoc better encapsulated. Memory leak fix in
- * yaz-socket-manager.cc.
- *
- * Revision 1.1.1.1 1999/01/28 09:41:07 adam
- * First implementation of YAZ++.
- *
+ * $Id: yaz-proxy.cpp,v 1.53 2003-10-08 09:49:05 adam Exp $
*/
#include <assert.h>
#include <time.h>
#include <yaz/log.h>
-#include <yaz-proxy.h>
+#include <yaz/diagbib1.h>
+#include <yaz++/proxy.h>
+
+static const char *apdu_name(Z_APDU *apdu)
+{
+ switch (apdu->which)
+ {
+ case Z_APDU_initRequest:
+ return "initRequest";
+ case Z_APDU_initResponse:
+ return "initResponse";
+ case Z_APDU_searchRequest:
+ return "searchRequest";
+ case Z_APDU_searchResponse:
+ return "searchResponse";
+ case Z_APDU_presentRequest:
+ return "presentRequest";
+ case Z_APDU_presentResponse:
+ return "presentResponse";
+ case Z_APDU_deleteResultSetRequest:
+ return "deleteResultSetRequest";
+ case Z_APDU_deleteResultSetResponse:
+ return "deleteResultSetResponse";
+ case Z_APDU_scanRequest:
+ return "scanRequest";
+ case Z_APDU_scanResponse:
+ return "scanResponse";
+ case Z_APDU_sortRequest:
+ return "sortRequest";
+ case Z_APDU_sortResponse:
+ return "sortResponse";
+ case Z_APDU_extendedServicesRequest:
+ return "extendedServicesRequest";
+ case Z_APDU_extendedServicesResponse:
+ return "extendedServicesResponse";
+ case Z_APDU_close:
+ return "close";
+ }
+ return "other";
+}
Yaz_Proxy::Yaz_Proxy(IYaz_PDU_Observable *the_PDU_Observable) :
- Yaz_Z_Assoc(the_PDU_Observable)
+ Yaz_Z_Assoc(the_PDU_Observable), m_bw_stat(60), m_pdu_stat(60)
{
m_PDU_Observable = the_PDU_Observable;
m_client = 0;
m_parent = 0;
m_clientPool = 0;
m_seqno = 1;
- m_keepalive = 1;
+ m_keepalive = 0;
m_proxyTarget = 0;
- m_max_clients = 50;
+ m_default_target = 0;
+ m_proxy_authentication = 0;
+ m_max_clients = 150;
m_seed = time(0);
+ m_client_idletime = 600;
+ m_target_idletime = 600;
+ m_optimize = xstrdup ("1");
+ strcpy(m_session_str, "x");
+ m_session_no=0;
+ m_bytes_sent = m_bytes_recv = 0;
+ m_bw_hold_PDU = 0;
+ m_bw_max = 0;
+ m_pdu_max = 0;
+ m_max_record_retrieve = 0;
}
Yaz_Proxy::~Yaz_Proxy()
{
+ yaz_log(LOG_LOG, "%s Closed %d/%d sent/recv bytes total", m_session_str,
+ m_bytes_sent, m_bytes_recv);
xfree (m_proxyTarget);
+ xfree (m_default_target);
+ xfree (m_proxy_authentication);
+ xfree (m_optimize);
}
-void Yaz_Proxy::set_proxyTarget(const char *target)
+int Yaz_Proxy::set_config(const char *config)
{
- xfree (m_proxyTarget);
- m_proxyTarget = 0;
+ int r = m_config.read_xml(config);
+ return r;
+}
+
+void Yaz_Proxy::set_default_target(const char *target)
+{
+ xfree (m_default_target);
+ m_default_target = 0;
if (target)
- m_proxyTarget = (char *) xstrdup (target);
+ m_default_target = (char *) xstrdup (target);
+}
+
+void Yaz_Proxy::set_proxy_authentication (const char *auth)
+{
+ xfree (m_proxy_authentication);
+ m_proxy_authentication = 0;
+ if (auth)
+ m_proxy_authentication = (char *) xstrdup (auth);
}
-IYaz_PDU_Observer *Yaz_Proxy::clone(IYaz_PDU_Observable
- *the_PDU_Observable)
+IYaz_PDU_Observer *Yaz_Proxy::sessionNotify(IYaz_PDU_Observable
+ *the_PDU_Observable, int fd)
{
Yaz_Proxy *new_proxy = new Yaz_Proxy(the_PDU_Observable);
new_proxy->m_parent = this;
- new_proxy->timeout(120);
- new_proxy->set_proxyTarget(m_proxyTarget);
+ new_proxy->m_config = m_config;
+ new_proxy->timeout(m_client_idletime);
+ new_proxy->m_target_idletime = m_target_idletime;
+ new_proxy->set_default_target(m_default_target);
new_proxy->set_APDU_log(get_APDU_log());
+ new_proxy->set_proxy_authentication(m_proxy_authentication);
+ sprintf(new_proxy->m_session_str, "%ld:%d", (long) time(0), m_session_no);
+ m_session_no++;
+ yaz_log (LOG_LOG, "%s New session %s", new_proxy->m_session_str,
+ the_PDU_Observable->getpeername());
return new_proxy;
}
return 0;
}
+const char *Yaz_Proxy::load_balance(const char **url)
+{
+ int zurl_in_use[MAX_ZURL_PLEX];
+ Yaz_ProxyClient *c;
+ int i;
+
+ for (i = 0; i<MAX_ZURL_PLEX; i++)
+ zurl_in_use[i] = 0;
+ for (c = m_parent->m_clientPool; c; c = c->m_next)
+ {
+ for (i = 0; url[i]; i++)
+ if (!strcmp(url[i], c->get_hostname()))
+ zurl_in_use[i]++;
+ }
+ int min = 100000;
+ const char *ret = 0;
+ for (i = 0; url[i]; i++)
+ {
+ yaz_log(LOG_DEBUG, "%s zurl=%s use=%d",
+ m_session_str, url[i], zurl_in_use[i]);
+ if (min > zurl_in_use[i])
+ {
+ ret = url[i];
+ min = zurl_in_use[i];
+ }
+ }
+ return ret;
+}
+
Yaz_ProxyClient *Yaz_Proxy::get_client(Z_APDU *apdu)
{
assert (m_parent);
get_otherInfoAPDU(apdu, &oi);
char *cookie = get_cookie(oi);
- logf (LOG_LOG, "Yaz_Proxy::get_client cookie=%s", cookie ? cookie :
- "null");
- if (cookie)
+
+ if (!m_proxyTarget)
{
+ const char *url[MAX_ZURL_PLEX];
+ const char *proxy_host = get_proxy(oi);
+ if (proxy_host)
+ {
+ xfree(m_default_target);
+ m_default_target = xstrdup(proxy_host);
+ proxy_host = m_default_target;
+ }
+
+ int client_idletime = -1;
+ m_config.get_target_info(proxy_host, url, &m_keepalive, &m_bw_max,
+ &m_pdu_max, &m_max_record_retrieve,
+ &m_target_idletime, &client_idletime,
+ &parent->m_max_clients);
+ if (client_idletime != -1)
+ {
+ m_client_idletime = client_idletime;
+ timeout(m_client_idletime);
+ }
+ if (!url[0])
+ {
+ yaz_log(LOG_LOG, "%s No default target", m_session_str);
+ return 0;
+ }
+ // we don't handle multiplexing for cookie session, so we just
+ // pick the first one in this case (anonymous users will be able
+ // to use any backend)
+ if (cookie && *cookie)
+ m_proxyTarget = (char*) xstrdup(url[0]);
+ else
+ m_proxyTarget = (char*) xstrdup(load_balance(url));
+ }
+ if (cookie && *cookie)
+ {
+ Yaz_ProxyClient *cc = 0;
+
for (c = parent->m_clientPool; c; c = c->m_next)
{
assert (c->m_prev);
assert (*c->m_prev == c);
- if (!strcmp(cookie,c->m_cookie))
+ if (c->m_cookie && !strcmp(cookie,c->m_cookie) &&
+ !strcmp(m_proxyTarget, c->get_hostname()))
{
- logf (LOG_LOG, "Yaz_Proxy::get_client cached %s",
- c->get_hostname());
- c->m_seqno = parent->m_seqno;
- return c;
+ cc = c;
}
- }
+ }
+ if (cc)
+ {
+ // found it in cache
+ c = cc;
+ // The following handles "cancel"
+ // If connection is busy (waiting for PDU) and
+ // we have an initRequest we can safely do re-open
+ if (c->m_waiting && apdu->which == Z_APDU_initRequest)
+ {
+ yaz_log (LOG_LOG, "%s REOPEN target=%s", m_session_str,
+ c->get_hostname());
+ c->close();
+ c->client(m_proxyTarget);
+ c->m_init_flag = 0;
+
+ c->m_last_ok = 0;
+ c->m_cache.clear();
+ c->m_last_resultCount = 0;
+ c->m_sr_transform = 0;
+ c->m_waiting = 0;
+ c->m_resultSetStartPoint = 0;
+ c->timeout(m_target_idletime);
+ }
+ c->m_seqno = parent->m_seqno;
+ if (c->m_server && c->m_server != this)
+ c->m_server->m_client = 0;
+ c->m_server = this;
+ (parent->m_seqno)++;
+ yaz_log (LOG_DEBUG, "get_client 1 %p %p", this, c);
+ return c;
+ }
}
- if (!m_client)
+ else if (!c)
{
- if (apdu->which == Z_APDU_initRequest)
+ Yaz_ProxyClient *cc = 0;
+
+ for (c = parent->m_clientPool; c; c = c->m_next)
+ {
+ assert (c->m_prev);
+ assert (*c->m_prev == c);
+ if (c->m_server == 0 && c->m_cookie == 0 &&
+ !strcmp(m_proxyTarget, c->get_hostname()))
+ {
+ cc = c;
+ }
+ }
+ if (cc)
{
- logf (LOG_LOG, "got InitRequest");
+ // found it in cache
+ c = cc;
+
+ yaz_log (LOG_LOG, "%s REUSE %d %d %s",
+ m_session_str,
+ c->m_seqno, parent->m_seqno, c->get_hostname());
+
+ c->m_seqno = parent->m_seqno;
+ assert(c->m_server == 0);
+ c->m_server = this;
- const char *proxy_host =
- get_proxy(&apdu->u.initRequest->otherInfo);
- if (proxy_host)
- set_proxyTarget(proxy_host);
- logf (LOG_LOG, "proxy_host = %s", m_proxyTarget ?
- m_proxyTarget:"none");
+ (parent->m_seqno)++;
+ return c;
}
- else
+ }
+ if (!m_client)
+ {
+ if (apdu->which != Z_APDU_initRequest)
{
- logf (LOG_LOG, "no first INIT!");
+ yaz_log (LOG_LOG, "no first INIT!");
return 0;
}
- if (!m_proxyTarget)
- return 0;
+ Z_InitRequest *initRequest = apdu->u.initRequest;
+
+ if (!initRequest->idAuthentication)
+ {
+ if (m_proxy_authentication)
+ {
+ initRequest->idAuthentication =
+ (Z_IdAuthentication *)
+ odr_malloc (odr_encode(),
+ sizeof(*initRequest->idAuthentication));
+ initRequest->idAuthentication->which =
+ Z_IdAuthentication_open;
+ initRequest->idAuthentication->u.open =
+ odr_strdup (odr_encode(), m_proxy_authentication);
+ }
+ }
+ // go through list of clients - and find the lowest/oldest one.
Yaz_ProxyClient *c_min = 0;
int min_seq = -1;
int no_of_clients = 0;
+ if (parent->m_clientPool)
+ yaz_log (LOG_DEBUG, "Existing sessions");
for (c = parent->m_clientPool; c; c = c->m_next)
{
+ yaz_log (LOG_DEBUG, " Session %-3d wait=%d %s cookie=%s", c->m_seqno,
+ c->m_waiting, c->get_hostname(),
+ c->m_cookie ? c->m_cookie : "");
no_of_clients++;
- logf (LOG_LOG, "found seqno = %d", c->m_seqno);
if (min_seq < 0 || c->m_seqno < min_seq)
{
min_seq = c->m_seqno;
if (no_of_clients >= parent->m_max_clients)
{
c = c_min;
- logf (LOG_LOG, "Yaz_Proxy::get_client re-using session %d",
- c->m_seqno);
- if (c->m_server)
- delete c->m_server;
- c->m_server = 0;
+ if (c->m_waiting || strcmp(m_proxyTarget, c->get_hostname()))
+ {
+ yaz_log (LOG_LOG, "%s MAXCLIENTS Destroy %d",
+ m_session_str, c->m_seqno);
+ if (c->m_server && c->m_server != this)
+ delete c->m_server;
+ c->m_server = 0;
+ }
+ else
+ {
+ yaz_log (LOG_LOG, "%s MAXCLIENTS Reuse %d %d %s",
+ m_session_str,
+ c->m_seqno, parent->m_seqno, c->get_hostname());
+ xfree (c->m_cookie);
+ c->m_cookie = 0;
+ if (cookie)
+ c->m_cookie = xstrdup(cookie);
+ c->m_seqno = parent->m_seqno;
+ if (c->m_server && c->m_server != this)
+ {
+ c->m_server->m_client = 0;
+ delete c->m_server;
+ }
+ (parent->m_seqno)++;
+ return c;
+ }
}
else
{
- logf (LOG_LOG, "Yaz_Proxy::get_client making session %d",
- parent->m_seqno);
+ yaz_log (LOG_LOG, "%s NEW %d %s",
+ m_session_str, parent->m_seqno, m_proxyTarget);
c = new Yaz_ProxyClient(m_PDU_Observable->clone());
c->m_next = parent->m_clientPool;
if (c->m_next)
parent->m_clientPool = c;
c->m_prev = &parent->m_clientPool;
}
- sprintf (c->m_cookie, "%lx.%d", m_seed, parent->m_seqno);
- logf (LOG_LOG, "Yaz_Proxy::get_client connect to %s", m_proxyTarget);
+
+ xfree (c->m_cookie);
+ c->m_cookie = 0;
+ if (cookie)
+ c->m_cookie = xstrdup(cookie);
+
c->m_seqno = parent->m_seqno;
c->client(m_proxyTarget);
c->m_init_flag = 0;
-
- delete c->m_last_query;
- c->m_last_query = 0;
c->m_last_resultCount = 0;
+ c->m_last_ok = 0;
+ c->m_cache.clear();
c->m_sr_transform = 0;
-
- c->timeout(600);
+ c->m_waiting = 0;
+ c->m_resultSetStartPoint = 0;
+ c->timeout(30);
(parent->m_seqno)++;
}
+ yaz_log (LOG_DEBUG, "get_client 3 %p %p", this, c);
return c;
}
+void Yaz_Proxy::display_diagrecs(Z_DiagRec **pp, int num)
+{
+ int i;
+ for (i = 0; i<num; i++)
+ {
+ oident *ent;
+ Z_DefaultDiagFormat *r;
+ Z_DiagRec *p = pp[i];
+ if (p->which != Z_DiagRec_defaultFormat)
+ {
+ yaz_log(LOG_LOG, "%s Error no diagnostics", m_session_str);
+ return;
+ }
+ else
+ r = p->u.defaultFormat;
+ if (!(ent = oid_getentbyoid(r->diagnosticSetId)) ||
+ ent->oclass != CLASS_DIAGSET || ent->value != VAL_BIB1)
+ yaz_log(LOG_LOG, "%s Error unknown diagnostic set", m_session_str);
+ switch (r->which)
+ {
+ case Z_DefaultDiagFormat_v2Addinfo:
+ yaz_log(LOG_LOG, "%s Error %d %s:%s",
+ m_session_str,
+ *r->condition, diagbib1_str(*r->condition),
+ r->u.v2Addinfo);
+ break;
+ case Z_DefaultDiagFormat_v3Addinfo:
+ yaz_log(LOG_LOG, "%s Error %d %s:%s",
+ m_session_str,
+ *r->condition, diagbib1_str(*r->condition),
+ r->u.v3Addinfo);
+ break;
+ }
+ }
+}
+
+int Yaz_Proxy::send_to_client(Z_APDU *apdu)
+{
+ int len = 0;
+ if (apdu->which == Z_APDU_searchResponse)
+ {
+ Z_SearchResponse *sr = apdu->u.searchResponse;
+ Z_Records *p = sr->records;
+ if (p && p->which == Z_Records_NSD)
+ {
+ Z_DiagRec dr, *dr_p = &dr;
+ dr.which = Z_DiagRec_defaultFormat;
+ dr.u.defaultFormat = p->u.nonSurrogateDiagnostic;
+
+ display_diagrecs(&dr_p, 1);
+ }
+ else
+ {
+ if (sr->resultCount)
+ yaz_log(LOG_LOG, "%s %d hits", m_session_str,
+ *sr->resultCount);
+ }
+ }
+ else if (apdu->which == Z_APDU_presentResponse)
+ {
+ Z_PresentResponse *sr = apdu->u.presentResponse;
+ Z_Records *p = sr->records;
+ if (p && p->which == Z_Records_NSD)
+ {
+ Z_DiagRec dr, *dr_p = &dr;
+ dr.which = Z_DiagRec_defaultFormat;
+ dr.u.defaultFormat = p->u.nonSurrogateDiagnostic;
+
+ display_diagrecs(&dr_p, 1);
+ }
+ }
+ int r = send_Z_PDU(apdu, &len);
+ yaz_log (LOG_LOG, "%s Sending %s to client %d bytes", m_session_str,
+ apdu_name(apdu), len);
+ m_bytes_sent += len;
+ m_bw_stat.add_bytes(len);
+ return r;
+}
+
+int Yaz_ProxyClient::send_to_target(Z_APDU *apdu)
+{
+ int len = 0;
+ int r = send_Z_PDU(apdu, &len);
+ yaz_log (LOG_LOG, "%s Sending %s to %s %d bytes",
+ get_session_str(),
+ apdu_name(apdu), get_hostname(), len);
+ m_bytes_sent += len;
+ return r;
+}
+
Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
{
+ if (*m_parent->m_optimize == '0')
+ return apdu; // don't optimize result sets..
+ if (apdu->which == Z_APDU_presentRequest)
+ {
+ Z_PresentRequest *pr = apdu->u.presentRequest;
+ Z_NamePlusRecordList *npr;
+ int toget = *pr->numberOfRecordsRequested;
+ int start = *pr->resultSetStartPoint;
+
+ if (m_client->m_last_resultSetId &&
+ !strcmp(m_client->m_last_resultSetId, pr->resultSetId))
+ {
+ if (m_client->m_cache.lookup (odr_encode(), &npr, start, toget,
+ pr->preferredRecordSyntax,
+ pr->recordComposition))
+ {
+ yaz_log (LOG_LOG, "%s Returned cache records for present request",
+ m_session_str);
+ Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
+ new_apdu->u.presentResponse->referenceId = pr->referenceId;
+
+ new_apdu->u.presentResponse->numberOfRecordsReturned
+ = odr_intdup(odr_encode(), toget);
+
+ new_apdu->u.presentResponse->records = (Z_Records*)
+ odr_malloc(odr_encode(), sizeof(Z_Records));
+ new_apdu->u.presentResponse->records->which = Z_Records_DBOSD;
+ new_apdu->u.presentResponse->records->u.databaseOrSurDiagnostics = npr;
+ new_apdu->u.presentResponse->nextResultSetPosition =
+ odr_intdup(odr_encode(), start+toget);
+
+ send_to_client(new_apdu);
+ return 0;
+ }
+ }
+ }
+
if (apdu->which != Z_APDU_searchRequest)
return apdu;
Z_SearchRequest *sr = apdu->u.searchRequest;
Yaz_Z_Query *this_query = new Yaz_Z_Query;
+ Yaz_Z_Databases this_databases;
+
+ this_databases.set(sr->num_databaseNames, (const char **)
+ sr->databaseNames);
this_query->set_Z_Query(sr->query);
-
- if (m_client->m_last_query &&
- m_client->m_last_query->match(this_query))
+
+ char query_str[80];
+ this_query->print(query_str, sizeof(query_str)-1);
+ yaz_log(LOG_LOG, "%s Query %s", m_session_str, query_str);
+
+ if (m_client->m_last_ok && m_client->m_last_query &&
+ m_client->m_last_query->match(this_query) &&
+ !strcmp(m_client->m_last_resultSetId, sr->resultSetName) &&
+ m_client->m_last_databases.match(this_databases))
{
delete this_query;
if (m_client->m_last_resultCount > *sr->smallSetUpperBound &&
m_client->m_last_resultCount < *sr->largeSetLowerBound)
{
- // medium Set
- logf (LOG_LOG, "Yaz_Proxy::result_set_optimize 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;
+ Z_NamePlusRecordList *npr;
+ int toget = *sr->mediumSetPresentNumber;
+ Z_RecordComposition *comp = 0;
+
+ if (toget > m_client->m_last_resultCount)
+ toget = m_client->m_last_resultCount;
+
if (sr->mediumSetElementSetNames)
{
- pr->recordComposition = (Z_RecordComposition *)
+ comp = (Z_RecordComposition *)
odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
- pr->recordComposition->which = Z_RecordComp_simple;
- pr->recordComposition->u.simple = sr->mediumSetElementSetNames;
+ comp->which = Z_RecordComp_simple;
+ comp->u.simple = sr->mediumSetElementSetNames;
+ }
+
+ if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
+ sr->preferredRecordSyntax, comp))
+ {
+ yaz_log (LOG_LOG, "%s Returned cache records for medium set",
+ m_session_str);
+ 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;
+
+ new_apdu->u.searchResponse->numberOfRecordsReturned
+ = odr_intdup(odr_encode(), toget);
+
+ new_apdu->u.searchResponse->presentStatus =
+ odr_intdup(odr_encode(), Z_PresentStatus_success);
+ new_apdu->u.searchResponse->records = (Z_Records*)
+ odr_malloc(odr_encode(), sizeof(Z_Records));
+ new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
+ new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
+ new_apdu->u.searchResponse->nextResultSetPosition =
+ odr_intdup(odr_encode(), toget+1);
+ send_to_client(new_apdu);
+ return 0;
+ }
+ else
+ {
+ // medium Set
+ // send present request (medium size)
+ yaz_log (LOG_LOG, "%s Optimizing search for medium set",
+ m_session_str);
+
+ 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 = toget;
+ pr->recordComposition = comp;
+ m_client->m_sr_transform = 1;
+ return new_apdu;
}
- m_client->m_sr_transform = 1;
- return new_apdu;
}
- else if (m_client->m_last_resultCount > *sr->largeSetLowerBound ||
- m_client->m_last_resultCount == 0)
+ else if (m_client->m_last_resultCount >= *sr->largeSetLowerBound ||
+ m_client->m_last_resultCount <= 0)
{
- // large set
- logf (LOG_LOG, "Yaz_Proxy::result_set_optimize large set");
+ // large set. Return pseudo-search response immediately
+ yaz_log (LOG_LOG, "%s Optimizing search for large set",
+ m_session_str);
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);
+ send_to_client(new_apdu);
return 0;
}
else
{
+ Z_NamePlusRecordList *npr;
+ int toget = m_client->m_last_resultCount;
+ Z_RecordComposition *comp = 0;
// small set
- logf (LOG_LOG, "Yaz_Proxy::result_set_optimize 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;
+ // send a present request (small set)
+
if (sr->smallSetElementSetNames)
{
- pr->recordComposition = (Z_RecordComposition *)
+ comp = (Z_RecordComposition *)
odr_malloc(odr_encode(), sizeof(Z_RecordComposition));
- pr->recordComposition->which = Z_RecordComp_simple;
- pr->recordComposition->u.simple = sr->smallSetElementSetNames;
+ comp->which = Z_RecordComp_simple;
+ comp->u.simple = sr->smallSetElementSetNames;
+ }
+
+ if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
+ sr->preferredRecordSyntax, comp))
+ {
+ yaz_log (LOG_LOG, "%s Returned cache records for small set",
+ m_session_str);
+ 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;
+
+ new_apdu->u.searchResponse->numberOfRecordsReturned
+ = odr_intdup(odr_encode(), toget);
+
+ new_apdu->u.searchResponse->presentStatus =
+ odr_intdup(odr_encode(), Z_PresentStatus_success);
+ new_apdu->u.searchResponse->records = (Z_Records*)
+ odr_malloc(odr_encode(), sizeof(Z_Records));
+ new_apdu->u.searchResponse->records->which = Z_Records_DBOSD;
+ new_apdu->u.searchResponse->records->u.databaseOrSurDiagnostics = npr;
+ new_apdu->u.searchResponse->nextResultSetPosition =
+ odr_intdup(odr_encode(), toget+1);
+ send_to_client(new_apdu);
+ return 0;
+ }
+ else
+ {
+ yaz_log (LOG_LOG, "%s Optimizing search for small set",
+ m_session_str);
+ 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 = toget;
+ pr->recordComposition = comp;
+ m_client->m_sr_transform = 1;
+ return new_apdu;
}
- m_client->m_sr_transform = 1;
- return new_apdu;
}
}
- else
+ else // query doesn't match
{
- logf (LOG_LOG, "Yaz_Proxy::result_set_optimize new set");
delete m_client->m_last_query;
m_client->m_last_query = this_query;
+ m_client->m_last_ok = 0;
+ m_client->m_cache.clear();
+ m_client->m_resultSetStartPoint = 0;
+
+ xfree (m_client->m_last_resultSetId);
+ m_client->m_last_resultSetId = xstrdup (sr->resultSetName);
+
+ m_client->m_last_databases.set(sr->num_databaseNames,
+ (const char **) sr->databaseNames);
+ }
+ return apdu;
+}
+
+
+void Yaz_Proxy::recv_Z_PDU(Z_APDU *apdu, int len)
+{
+ int reduce = 0;
+ m_bytes_recv += len;
+
+ yaz_log (LOG_LOG, "%s Receiving %s from client %d bytes", m_session_str,
+ apdu_name(apdu), len);
+
+ if (m_bw_hold_PDU) // double incoming PDU. shutdown now.
+ shutdown();
+
+ m_bw_stat.add_bytes(len);
+ m_pdu_stat.add_bytes(1);
+
+ int bw_total = m_bw_stat.get_total();
+ int pdu_total = m_pdu_stat.get_total();
+
+ yaz_log(LOG_LOG, "%s stat bw=%d pdu=%d limit-bw=%d limit-pdu=%d",
+ m_session_str, bw_total, pdu_total, m_bw_max, m_pdu_max);
+ if (m_bw_max)
+ {
+ if (bw_total > m_bw_max)
+ {
+ reduce = (bw_total/m_bw_max);
+ }
+ }
+ if (m_pdu_max)
+ {
+ if (pdu_total > m_pdu_max)
+ {
+ int nreduce = (60/m_pdu_max);
+ reduce = (reduce > nreduce) ? reduce : nreduce;
+ }
+ }
+ if (reduce)
+ {
+ yaz_log(LOG_LOG, "%s Limit delay=%d", m_session_str, reduce);
+ m_bw_hold_PDU = apdu; // save PDU and signal "on hold"
+ timeout(reduce); // call us reduce seconds later
+ }
+ else
+ recv_Z_PDU_0(apdu); // all fine. Proceed receive PDU as usual
+}
+
+void Yaz_Proxy::handle_max_record_retrieve(Z_APDU *apdu)
+{
+ if (m_max_record_retrieve)
+ {
+ if (apdu->which == Z_APDU_presentRequest)
+ {
+ Z_PresentRequest *pr = apdu->u.presentRequest;
+ if (pr->numberOfRecordsRequested &&
+ *pr->numberOfRecordsRequested > m_max_record_retrieve)
+ *pr->numberOfRecordsRequested = m_max_record_retrieve;
+ }
+ }
+}
+
+Z_Records *Yaz_Proxy::create_nonSurrogateDiagnostics(ODR odr,
+ int error,
+ const char *addinfo)
+{
+ Z_Records *rec = (Z_Records *)
+ odr_malloc (odr, sizeof(*rec));
+ int *err = (int *)
+ odr_malloc (odr, sizeof(*err));
+ Z_DiagRec *drec = (Z_DiagRec *)
+ odr_malloc (odr, sizeof(*drec));
+ Z_DefaultDiagFormat *dr = (Z_DefaultDiagFormat *)
+ odr_malloc (odr, sizeof(*dr));
+ *err = error;
+ rec->which = Z_Records_NSD;
+ rec->u.nonSurrogateDiagnostic = dr;
+ dr->diagnosticSetId =
+ yaz_oidval_to_z3950oid (odr, CLASS_DIAGSET, VAL_BIB1);
+ dr->condition = err;
+ dr->which = Z_DefaultDiagFormat_v2Addinfo;
+ dr->u.v2Addinfo = odr_strdup (odr, addinfo ? addinfo : "");
+ return rec;
+}
+
+Z_APDU *Yaz_Proxy::handle_query_validation(Z_APDU *apdu)
+{
+ if (apdu->which == Z_APDU_searchRequest)
+ {
+ Z_SearchRequest *sr = apdu->u.searchRequest;
+ int err;
+ char *addinfo = 0;
+ err = m_config.check_query(odr_encode(), m_default_target, sr->query,
+ &addinfo);
+ if (err)
+ {
+ Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
+
+ new_apdu->u.searchResponse->referenceId = sr->referenceId;
+ new_apdu->u.searchResponse->records =
+ create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
+ *new_apdu->u.searchResponse->searchStatus = 0;
+
+ send_to_client(new_apdu);
+
+ return 0;
+ }
+ }
+ return apdu;
+}
+
+Z_APDU *Yaz_Proxy::handle_syntax_validation(Z_APDU *apdu)
+{
+ if (apdu->which == Z_APDU_searchRequest)
+ {
+ Z_SearchRequest *sr = apdu->u.searchRequest;
+ if (*sr->smallSetUpperBound > 0 || *sr->largeSetLowerBound > 1)
+ {
+ int err;
+ char *addinfo = 0;
+ err = m_config.check_syntax(odr_encode(), m_default_target,
+ sr->preferredRecordSyntax,
+ &addinfo);
+ if (err)
+ {
+ Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
+
+ new_apdu->u.searchResponse->referenceId = sr->referenceId;
+ new_apdu->u.searchResponse->records =
+ create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
+ *new_apdu->u.searchResponse->searchStatus = 0;
+
+ send_to_client(new_apdu);
+
+ return 0;
+ }
+ }
+ }
+ else if (apdu->which == Z_APDU_presentRequest)
+ {
+ Z_PresentRequest *pr = apdu->u.presentRequest;
+ int err;
+ char *addinfo = 0;
+ err = m_config.check_syntax(odr_encode(), m_default_target,
+ pr->preferredRecordSyntax,
+ &addinfo);
+ if (err)
+ {
+ Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
+
+ new_apdu->u.presentResponse->referenceId = pr->referenceId;
+ new_apdu->u.presentResponse->records =
+ create_nonSurrogateDiagnostics(odr_encode(), err, addinfo);
+ *new_apdu->u.presentResponse->presentStatus =
+ Z_PresentStatus_failure;
+
+ send_to_client(new_apdu);
+
+ return 0;
+ }
}
return apdu;
}
-void Yaz_Proxy::recv_Z_PDU(Z_APDU *apdu)
+void Yaz_Proxy::recv_Z_PDU_0(Z_APDU *apdu)
{
- logf (LOG_LOG, "Yaz_Proxy::recv_Z_PDU");
// Determine our client.
m_client = get_client(apdu);
if (!m_client)
}
m_client->m_server = this;
-#if 0
- Z_OtherInformation **oi;
- get_otherInfoAPDU(apdu, &oi);
- *oi = 0;
-#endif
-
if (apdu->which == Z_APDU_initRequest)
{
+ if (apdu->u.initRequest->implementationId)
+ yaz_log(LOG_LOG, "%s implementationId: %s",
+ m_session_str, apdu->u.initRequest->implementationId);
+ if (apdu->u.initRequest->implementationName)
+ yaz_log(LOG_LOG, "%s implementationName: %s",
+ m_session_str, apdu->u.initRequest->implementationName);
+ if (apdu->u.initRequest->implementationVersion)
+ yaz_log(LOG_LOG, "%s implementationVersion: %s",
+ m_session_str, apdu->u.initRequest->implementationVersion);
if (m_client->m_init_flag)
{
- Z_APDU *apdu = create_Z_PDU(Z_APDU_initResponse);
- if (m_client->m_cookie)
+ Z_APDU *apdu = m_client->m_initResponse;
+ apdu->u.initResponse->otherInfo = 0;
+ if (m_client->m_cookie && *m_client->m_cookie)
set_otherInformationString(apdu, VAL_COOKIE, 1,
m_client->m_cookie);
- send_Z_PDU(apdu);
+ send_to_client(apdu);
return;
}
m_client->m_init_flag = 1;
}
- apdu = result_set_optimize(apdu);
+ handle_max_record_retrieve(apdu);
+
+ if (apdu)
+ apdu = handle_syntax_validation(apdu);
+
+ if (apdu)
+ apdu = handle_query_validation(apdu);
+
+ if (apdu)
+ apdu = result_set_optimize(apdu);
if (!apdu)
+ {
+ m_client->timeout(m_target_idletime); // mark it active even
+ // though we didn't use it
return;
+ }
- logf (LOG_LOG, "Yaz_ProxyClient::send_Z_PDU %s", m_client->get_hostname());
- if (m_client->send_Z_PDU(apdu) < 0)
+ // delete other info part from PDU before sending to target
+ Z_OtherInformation **oi;
+ get_otherInfoAPDU(apdu, &oi);
+ if (oi)
+ *oi = 0;
+
+ if (apdu->which == Z_APDU_presentRequest &&
+ m_client->m_resultSetStartPoint == 0)
+ {
+ Z_PresentRequest *pr = apdu->u.presentRequest;
+ m_client->m_resultSetStartPoint = *pr->resultSetStartPoint;
+ m_client->m_cache.copy_presentRequest(apdu->u.presentRequest);
+ } else {
+ m_client->m_resultSetStartPoint = 0;
+ }
+ if (m_client->send_to_target(apdu) < 0)
{
delete m_client;
+ m_client = 0;
delete this;
}
+ else
+ m_client->m_waiting = 1;
}
void Yaz_Proxy::connectNotify()
void Yaz_Proxy::shutdown()
{
- logf (LOG_LOG, "shutdown (client to proxy)");
- if (m_keepalive)
+ // only keep if keep_alive flag is set...
+ if (m_keepalive && m_client && m_client->m_waiting == 0)
{
+ yaz_log (LOG_LOG, "%s Shutdown (client to proxy) keepalive %s",
+ m_session_str,
+ m_client->get_hostname());
+ assert (m_client->m_waiting != 2);
// Tell client (if any) that no server connection is there..
- if (m_client)
- m_client->m_server = 0;
+ m_client->m_server = 0;
}
- else
+ else if (m_client)
{
+ yaz_log (LOG_LOG, "%s Shutdown (client to proxy) close %s",
+ m_session_str,
+ m_client->get_hostname());
+ assert (m_client->m_waiting != 2);
delete m_client;
}
+ else if (!m_parent)
+ {
+ yaz_log (LOG_LOG, "%s shutdown (client to proxy) bad state",
+ m_session_str);
+ assert (m_parent);
+ }
+ else
+ {
+ yaz_log (LOG_LOG, "%s Shutdown (client to proxy)",
+ m_session_str);
+ }
delete this;
}
+const char *Yaz_ProxyClient::get_session_str()
+{
+ if (!m_server)
+ return "0";
+ return m_server->get_session_str();
+}
+
void Yaz_ProxyClient::shutdown()
{
- logf (LOG_LOG, "shutdown (proxy to server) %s", get_hostname());
+ yaz_log (LOG_LOG, "%s Shutdown (proxy to target) %s", get_session_str(),
+ get_hostname());
delete m_server;
delete this;
}
void Yaz_Proxy::failNotify()
{
- logf (LOG_LOG, "connection closed by client");
+ yaz_log (LOG_LOG, "%s Connection closed by client",
+ get_session_str());
shutdown();
}
void Yaz_ProxyClient::failNotify()
{
- logf (LOG_LOG, "Yaz_ProxyClient connection closed by %s", get_hostname());
+ yaz_log (LOG_LOG, "%s Connection closed by target %s",
+ get_session_str(), get_hostname());
shutdown();
}
void Yaz_ProxyClient::connectNotify()
{
- logf (LOG_LOG, "Yaz_ProxyClient connection accept by %s", get_hostname());
+ yaz_log (LOG_LOG, "%s Connection accepted by %s", get_session_str(),
+ get_hostname());
+ int to;
+ if (m_server)
+ to = m_server->get_target_idletime();
+ else
+ to = 600;
+ timeout(to);
}
-IYaz_PDU_Observer *Yaz_ProxyClient::clone(IYaz_PDU_Observable
- *the_PDU_Observable)
+IYaz_PDU_Observer *Yaz_ProxyClient::sessionNotify(IYaz_PDU_Observable
+ *the_PDU_Observable, int fd)
{
return new Yaz_ProxyClient(the_PDU_Observable);
}
Yaz_ProxyClient::~Yaz_ProxyClient()
{
if (m_prev)
- {
*m_prev = m_next;
- if (m_next)
- m_next->m_prev = m_prev;
- }
+ if (m_next)
+ m_next->m_prev = m_prev;
+ m_waiting = 2; // for debugging purposes only.
+ odr_destroy(m_init_odr);
delete m_last_query;
+ xfree (m_last_resultSetId);
+ xfree (m_cookie);
}
void Yaz_Proxy::timeoutNotify()
{
- logf (LOG_LOG, "timeout (client to proxy)");
- shutdown();
+ if (m_bw_hold_PDU)
+ {
+ timeout(m_client_idletime);
+ Z_APDU *apdu = m_bw_hold_PDU;
+ m_bw_hold_PDU = 0;
+ recv_Z_PDU_0(apdu);
+ }
+ else
+ {
+ yaz_log (LOG_LOG, "%s Timeout (client to proxy)", m_session_str);
+ shutdown();
+ }
}
void Yaz_ProxyClient::timeoutNotify()
{
- logf (LOG_LOG, "timeout (proxy to target) %s", get_hostname());
+ yaz_log (LOG_LOG, "%s Timeout (proxy to target) %s", get_session_str(),
+ get_hostname());
shutdown();
}
Yaz_ProxyClient::Yaz_ProxyClient(IYaz_PDU_Observable *the_PDU_Observable) :
Yaz_Z_Assoc (the_PDU_Observable)
{
- m_cookie[0] = 0;
+ m_cookie = 0;
m_next = 0;
m_prev = 0;
m_init_flag = 0;
m_last_query = 0;
+ m_last_resultSetId = 0;
m_last_resultCount = 0;
+ m_last_ok = 0;
m_sr_transform = 0;
+ m_waiting = 0;
+ m_init_odr = odr_createmem (ODR_DECODE);
+ m_initResponse = 0;
+ m_resultSetStartPoint = 0;
+ m_bytes_sent = m_bytes_recv = 0;
}
-void Yaz_ProxyClient::recv_Z_PDU(Z_APDU *apdu)
+const char *Yaz_Proxy::option(const char *name, const char *value)
{
- logf (LOG_LOG, "Yaz_ProxyClient::recv_Z_PDU %s", get_hostname());
+ if (!strcmp (name, "optimize")) {
+ if (value) {
+ xfree (m_optimize);
+ m_optimize = xstrdup (value);
+ }
+ return m_optimize;
+ }
+ return 0;
+}
+
+void Yaz_ProxyClient::recv_Z_PDU(Z_APDU *apdu, int len)
+{
+ m_bytes_recv += len;
+ m_waiting = 0;
+ yaz_log (LOG_LOG, "%s Receiving %s from %s %d bytes", get_session_str(),
+ apdu_name(apdu), get_hostname(), len);
+ if (apdu->which == Z_APDU_initResponse)
+ {
+ NMEM nmem = odr_extract_mem (odr_decode());
+ odr_reset (m_init_odr);
+ nmem_transfer (m_init_odr->mem, nmem);
+ m_initResponse = apdu;
+
+ Z_InitResponse *ir = apdu->u.initResponse;
+ char *im0 = ir->implementationName;
+
+ char *im1 = (char*)
+ odr_malloc(m_init_odr, 20 + (im0 ? strlen(im0) : 0));
+ *im1 = '\0';
+ if (im0)
+ {
+ strcat(im1, im0);
+ strcat(im1, " ");
+ }
+ strcat(im1, "(YAZ Proxy)");
+ ir->implementationName = im1;
+
+ nmem_destroy (nmem);
+ }
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_SearchResponse *sr = apdu->u.searchResponse;
+ m_last_resultCount = *sr->resultCount;
+ int status = *sr->searchStatus;
+ if (status && (!sr->records || sr->records->which == Z_Records_DBOSD))
+ {
+ m_last_ok = 1;
+
+ if (sr->records && sr->records->which == Z_Records_DBOSD)
+ {
+ m_cache.add(odr_decode(),
+ sr->records->u.databaseOrSurDiagnostics, 1,
+ *sr->resultCount);
+ }
+ }
+ }
+ if (apdu->which == Z_APDU_presentResponse)
+ {
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_sr_transform)
+ {
+ m_sr_transform = 0;
+ 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 (pr->records &&
+ pr->records->which == Z_Records_DBOSD && m_resultSetStartPoint)
+ {
+ m_cache.add(odr_decode(),
+ pr->records->u.databaseOrSurDiagnostics,
+ m_resultSetStartPoint, -1);
+ m_resultSetStartPoint = 0;
+ }
}
if (m_cookie)
set_otherInformationString (apdu, VAL_COOKIE, 1, m_cookie);
if (m_server)
{
- logf (LOG_LOG, "Yaz_Proxy::send_Z_PDU");
- m_server->send_Z_PDU(apdu);
+ m_server->send_to_client(apdu);
+ }
+ if (apdu->which == Z_APDU_close)
+ {
+ shutdown();
}
}
projects / yazpp-moved-to-github.git / blobdiff