Update for the yazpp_1 namespace.
[yazproxy-moved-to-github.git] / src / yaz-proxy.cpp
index 0ac056b..c1cc98f 100644 (file)
@@ -1,14 +1,14 @@
-/* $Id: yaz-proxy.cpp,v 1.3 2004-04-11 12:25:01 adam Exp $
-   Copyright (c) 1998-2004, Index Data.
+/* $Id: yaz-proxy.cpp,v 1.29 2005-06-02 06:40:46 adam Exp $
+   Copyright (c) 1998-2005, Index Data.
 
 This file is part of the yaz-proxy.
 
-Zebra is free software; you can redistribute it and/or modify it under
+YAZ proxy is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free
 Software Foundation; either version 2, or (at your option) any later
 version.
 
-Zebra is distributed in the hope that it will be useful, but WITHOUT ANY
+YAZ proxy is distributed in the hope that it will be useful, but WITHOUT ANY
 WARRANTY; without even the implied warranty of MERCHANTABILITY or
 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 for more details.
@@ -20,13 +20,26 @@ Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  */
 
 #ifdef WIN32
-#else
+#define HAVE_SYS_STAT_H 1
+#define HAVE_SYS_TYPES_H 1
+#endif
+
+#if HAVE_UNISTD_H
 #include <unistd.h>
 #endif
+#if HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
 
 #include <assert.h>
+#include <stdlib.h>
 #include <time.h>
-#include <sys/types.h>
 #include <fcntl.h>
 
 #include <yaz/srw.h>
@@ -34,8 +47,51 @@ Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #include <yaz/yaz-iconv.h>
 #include <yaz/log.h>
 #include <yaz/diagbib1.h>
-#include <yazproxy/proxy.h>
+#include "proxyp.h"
 #include <yaz/pquery.h>
+#include <yaz/otherinfo.h>
+#include <yaz/charneg.h>
+#include "msg-thread.h"
+
+using namespace yazpp_1;
+
+class Auth_Msg : public IMsg_Thread {
+public:
+    int m_ret;
+    void destroy();
+    IMsg_Thread *handle();
+    void result();
+    Yaz_Proxy *m_proxy;
+    Z_APDU *m_apdu;
+};
+
+IMsg_Thread *Auth_Msg::handle()
+{
+    yaz_log(YLOG_LOG, "Auth_Msg:handle begin");
+    m_ret = m_proxy->handle_authentication(m_apdu);
+    yaz_log(YLOG_LOG, "Auth_Msg:handle end");
+    return this;
+}
+
+void Yaz_Proxy::result_authentication(Z_APDU *apdu, int ret)
+{
+    if (ret == 0)
+    {
+       Z_APDU *apdu_reject = zget_APDU(odr_encode(), Z_APDU_initResponse);
+       *apdu_reject->u.initResponse->result = 0;
+       send_to_client(apdu_reject);
+       shutdown();
+    }
+    else
+       handle_incoming_Z_PDU_2(apdu);
+}
+
+void Auth_Msg::result()
+{
+    yaz_log(YLOG_LOG, "Auth_Msg:result");
+    m_proxy->result_authentication(m_apdu, m_ret);
+    delete this;
+}
 
 static const char *apdu_name(Z_APDU *apdu)
 {
@@ -90,10 +146,13 @@ static const char *gdu_name(Z_GDU *gdu)
 }
 
 Yaz_Proxy::Yaz_Proxy(IYaz_PDU_Observable *the_PDU_Observable,
-                    Yaz_Proxy *parent) :
+                    IYazSocketObservable *the_socket_observable,
+                    Yaz_Proxy *parent) 
+    :
     Yaz_Z_Assoc(the_PDU_Observable), m_bw_stat(60), m_pdu_stat(60)
 {
     m_PDU_Observable = the_PDU_Observable;
+    m_socket_observable = the_socket_observable;
     m_client = 0;
     m_parent = parent;
     m_clientPool = 0;
@@ -102,7 +161,9 @@ Yaz_Proxy::Yaz_Proxy(IYaz_PDU_Observable *the_PDU_Observable,
     m_keepalive_limit_pdu = 1000;
     m_proxyTarget = 0;
     m_default_target = 0;
-    m_proxy_authentication = 0;
+    m_proxy_negotiation_charset = 0;
+    m_proxy_negotiation_lang = 0;
+    m_charset_converter = new Yaz_CharsetConverter;
     m_max_clients = 150;
     m_log_mask = 0;
     m_seed = time(0);
@@ -110,7 +171,7 @@ Yaz_Proxy::Yaz_Proxy(IYaz_PDU_Observable *the_PDU_Observable,
     m_target_idletime = 600;
     m_optimize = xstrdup ("1");
     strcpy(m_session_str, "0 ");
-    m_session_no=0;
+    m_session_no = 0;
     m_bytes_sent = 0;
     m_bytes_recv = 0;
     m_bw_hold_PDU = 0;
@@ -124,18 +185,26 @@ Yaz_Proxy::Yaz_Proxy(IYaz_PDU_Observable *the_PDU_Observable,
     m_referenceId = 0;
     m_referenceId_mem = nmem_create();
     m_config = 0;
-    m_marcxml_flag = 0;
+    m_marcxml_mode = none;
     m_stylesheet_xsp = 0;
     m_stylesheet_nprl = 0;
     m_s2z_stylesheet = 0;
     m_s2z_database = 0;
     m_schema = 0;
+    m_backend_type = 0;
+    m_backend_charset = 0;
+    m_frontend_type = 0;
     m_initRequest_apdu = 0;
     m_initRequest_mem = 0;
     m_initRequest_preferredMessageSize = 0;
     m_initRequest_maximumRecordSize = 0;
     m_initRequest_options = 0;
     m_initRequest_version = 0;
+    m_initRequest_oi_negotiation_charsets = 0;
+    m_initRequest_oi_negotiation_num_charsets = 0;
+    m_initRequest_oi_negotiation_langs = 0;
+    m_initRequest_oi_negotiation_num_langs = 0;
+    m_initRequest_oi_negotiation_selected = 0;
     m_apdu_invalid_session = 0;
     m_mem_invalid_session = 0;
     m_s2z_odr_init = 0;
@@ -148,40 +217,64 @@ Yaz_Proxy::Yaz_Proxy(IYaz_PDU_Observable *the_PDU_Observable,
     m_soap_ns = 0;
     m_s2z_packing = Z_SRW_recordPacking_string;
 #if HAVE_GETTIMEOFDAY
-    m_time_tv.tv_sec = 0;
-    m_time_tv.tv_usec = 0;
+    m_time_tv = xmalloc(sizeof(struct timeval));
+    struct timeval *tv = (struct timeval *) m_time_tv;
+    tv->tv_sec = 0;
+    tv->tv_usec = 0;
+#else
+    m_time_tv = 0;
 #endif
+    m_usemarcon_ini_stage1 = 0;
+    m_usemarcon_ini_stage2 = 0;
+    m_usemarcon = new Yaz_usemarcon();
     if (!m_parent)
        low_socket_open();
+    m_my_thread = 0;
 }
 
 Yaz_Proxy::~Yaz_Proxy()
 {
-    yaz_log(LOG_LOG, "%sClosed %d/%d sent/recv bytes total", m_session_str,
+    yaz_log(YLOG_LOG, "%sClosed %d/%d sent/recv bytes total", m_session_str,
            m_bytes_sent, m_bytes_recv);
     nmem_destroy(m_initRequest_mem);
     nmem_destroy(m_mem_invalid_session);
     nmem_destroy(m_referenceId_mem);
 
-    xfree (m_proxyTarget);
-    xfree (m_default_target);
-    xfree (m_proxy_authentication);
-    xfree (m_optimize);
+    xfree(m_proxyTarget);
+    xfree(m_default_target);
+    xfree(m_proxy_negotiation_charset);
+    xfree(m_proxy_negotiation_lang);
+    delete m_charset_converter;
+    xfree(m_optimize);
 
 #if HAVE_XSLT
     if (m_stylesheet_xsp)
-       xsltFreeStylesheet(m_stylesheet_xsp);
+       xsltFreeStylesheet((xsltStylesheetPtr) m_stylesheet_xsp);
 #endif
+    xfree (m_time_tv);
+
     xfree (m_schema);
+    xfree (m_backend_type);
+    xfree (m_backend_charset);
+    xfree (m_usemarcon_ini_stage1);
+    xfree (m_usemarcon_ini_stage2);
+    delete m_usemarcon;
     if (m_s2z_odr_init)
        odr_destroy(m_s2z_odr_init);
     if (m_s2z_odr_search)
        odr_destroy(m_s2z_odr_search);
     if (!m_parent)
        low_socket_close();
+    if (!m_parent)
+       delete m_my_thread;
     delete m_config;
 }
 
+void Yaz_Proxy::set_debug_mode(int mode)
+{
+    m_debug_mode = mode;
+}
+
 int Yaz_Proxy::set_config(const char *config)
 {
     delete m_config;
@@ -202,12 +295,18 @@ void Yaz_Proxy::set_default_target(const char *target)
        m_default_target = (char *) xstrdup (target);
 }
 
-void Yaz_Proxy::set_proxy_authentication (const char *auth)
+void Yaz_Proxy::set_proxy_negotiation (const char *charset, const char *lang)
 {
-    xfree (m_proxy_authentication);
-    m_proxy_authentication = 0;
-    if (auth)
-       m_proxy_authentication = (char *) xstrdup (auth);
+    yaz_log(YLOG_LOG, "%sSet the proxy negotiation: charset to '%s', "
+       "language to '%s'", m_session_str, charset?charset:"none",
+       lang?lang:"none");
+    xfree (m_proxy_negotiation_charset);
+    xfree (m_proxy_negotiation_lang);
+    m_proxy_negotiation_charset = m_proxy_negotiation_lang = 0;
+    if (charset)
+       m_proxy_negotiation_charset = (char *) xstrdup (charset);
+    if (lang)
+       m_proxy_negotiation_lang = (char *) xstrdup (lang);
 }
 
 Yaz_ProxyConfig *Yaz_Proxy::check_reconfigure()
@@ -218,14 +317,14 @@ Yaz_ProxyConfig *Yaz_Proxy::check_reconfigure()
     Yaz_ProxyConfig *cfg = m_config;
     if (m_reconfig_flag)
     {
-       yaz_log(LOG_LOG, "reconfigure");
+       yaz_log(YLOG_LOG, "reconfigure");
        yaz_log_reopen();
        if (m_config_fname && cfg)
        {
-           yaz_log(LOG_LOG, "reconfigure config %s", m_config_fname);
+           yaz_log(YLOG_LOG, "reconfigure config %s", m_config_fname);
            int r = cfg->read_xml(m_config_fname);
            if (r)
-               yaz_log(LOG_WARN, "reconfigure failed");
+               yaz_log(YLOG_WARN, "reconfigure failed");
            else
            {
                m_log_mask = 0;
@@ -233,7 +332,7 @@ Yaz_ProxyConfig *Yaz_Proxy::check_reconfigure()
            }
        }
        else
-           yaz_log(LOG_LOG, "reconfigure");
+           yaz_log(YLOG_LOG, "reconfigure");
        m_reconfig_flag = 0;
     }
     return cfg;
@@ -243,7 +342,8 @@ IYaz_PDU_Observer *Yaz_Proxy::sessionNotify(IYaz_PDU_Observable
                                            *the_PDU_Observable, int fd)
 {
     check_reconfigure();
-    Yaz_Proxy *new_proxy = new Yaz_Proxy(the_PDU_Observable, this);
+    Yaz_Proxy *new_proxy = new Yaz_Proxy(the_PDU_Observable,
+                                        m_socket_observable, this);
     new_proxy->m_config = 0;
     new_proxy->m_config_fname = 0;
     new_proxy->timeout(m_client_idletime);
@@ -256,11 +356,16 @@ IYaz_PDU_Observer *Yaz_Proxy::sessionNotify(IYaz_PDU_Observable
        new_proxy->set_APDU_yazlog(1);
     else
        new_proxy->set_APDU_yazlog(0);
-    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, "%sNew session %s", new_proxy->m_session_str,
+    yaz_log (YLOG_LOG, "%sNew session %s", new_proxy->m_session_str,
             the_PDU_Observable->getpeername());
+    new_proxy->set_proxy_negotiation(m_proxy_negotiation_charset,
+       m_proxy_negotiation_lang);
+    // create thread object the first time we get an incoming connection
+    if (!m_my_thread)
+       m_my_thread = new Msg_Thread(m_socket_observable);
+    new_proxy->m_my_thread = m_my_thread;
     return new_proxy;
 }
 
@@ -280,7 +385,6 @@ char *Yaz_Proxy::get_cookie(Z_OtherInformation **otherInfo)
        return oi->information.characterInfo;
     return 0;
 }
-
 char *Yaz_Proxy::get_proxy(Z_OtherInformation **otherInfo)
 {
     int oid[OID_SIZE];
@@ -295,7 +399,6 @@ char *Yaz_Proxy::get_proxy(Z_OtherInformation **otherInfo)
        return oi->information.characterInfo;
     return 0;
 }
-
 const char *Yaz_Proxy::load_balance(const char **url)
 {
     int zurl_in_use[MAX_ZURL_PLEX];
@@ -325,7 +428,7 @@ const char *Yaz_Proxy::load_balance(const char **url)
     const char *ret_spare = 0;
     for (i = 0; url[i]; i++)
     {
-       yaz_log(LOG_DEBUG, "%szurl=%s use=%d spare=%d",
+       yaz_log(YLOG_DEBUG, "%szurl=%s use=%d spare=%d",
                m_session_str, url[i], zurl_in_use[i], zurl_in_spare[i]);
        if (min_use > zurl_in_use[i])
        {
@@ -339,12 +442,6 @@ const char *Yaz_Proxy::load_balance(const char **url)
            max_spare = zurl_in_spare[i];
        }
     }
-    // use the one with minimum connections if spare is > 3
-    if (spare_for_min > 3)
-       return ret_min;
-    // use one with most spares (if any)
-    if (max_spare > 0)
-       return ret_spare;
     return ret_min;
 }
 
@@ -361,17 +458,21 @@ Yaz_ProxyClient *Yaz_Proxy::get_client(Z_APDU *apdu, const char *cookie,
        Yaz_ProxyConfig *cfg = check_reconfigure();
        if (proxy_host)
        {
-#if 0
-/* only to be enabled for debugging... */
-           if (!strcmp(proxy_host, "stop"))
-               exit(0);
-#endif
+           if (parent && parent->m_debug_mode)
+           {
+                // only to be enabled for debugging...
+               if (!strcmp(proxy_host, "stop"))
+                   exit(0);
+           }
            xfree(m_default_target);
            m_default_target = xstrdup(proxy_host);
-           proxy_host = m_default_target;
        }
+       proxy_host = m_default_target;
        int client_idletime = -1;
        const char *cql2rpn_fname = 0;
+       const char *negotiation_charset = 0;
+       const char *negotiation_lang = 0;
+       const char *query_charset = 0;
        url[0] = m_default_target;
        url[1] = 0;
        if (cfg)
@@ -384,7 +485,10 @@ Yaz_ProxyClient *Yaz_Proxy::get_client(Z_APDU *apdu, const char *cookie,
                                 &m_keepalive_limit_bw,
                                 &m_keepalive_limit_pdu,
                                 &pre_init,
-                                &cql2rpn_fname);
+                                &cql2rpn_fname,
+                                &negotiation_charset,
+                                &negotiation_lang,
+                                &query_charset);
        }
        if (client_idletime != -1)
        {
@@ -393,9 +497,15 @@ Yaz_ProxyClient *Yaz_Proxy::get_client(Z_APDU *apdu, const char *cookie,
        }
        if (cql2rpn_fname)
            m_cql2rpn.set_pqf_file(cql2rpn_fname);
+       if (negotiation_charset || negotiation_lang)
+       {
+           set_proxy_negotiation(negotiation_charset,
+               negotiation_lang);
+       }
+       m_charset_converter->set_target_query_charset(query_charset);
        if (!url[0])
        {
-           yaz_log(LOG_LOG, "%sNo default target", m_session_str);
+           yaz_log(YLOG_LOG, "%sNo default target", m_session_str);
            return 0;
        }
        // we don't handle multiplexing for cookie session, so we just
@@ -421,7 +531,7 @@ Yaz_ProxyClient *Yaz_Proxy::get_client(Z_APDU *apdu, const char *cookie,
                // 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,
+                   yaz_log (YLOG_LOG, "%s REOPEN target=%s", m_session_str,
                             c->get_hostname());
                    c->close();
                    c->m_init_flag = 0;
@@ -445,24 +555,29 @@ Yaz_ProxyClient *Yaz_Proxy::get_client(Z_APDU *apdu, const char *cookie,
                    c->m_server->m_client = 0;
                c->m_server = this;
                (parent->m_seqno)++;
-               yaz_log (LOG_DEBUG, "get_client 1 %p %p", this, c);
+               yaz_log (YLOG_DEBUG, "get_client 1 %p %p", this, c);
                return c;
            }
        }
     }
-    else if (!c)
+    else if (!c &&
+           apdu->which == Z_APDU_initRequest &&
+           apdu->u.initRequest->idAuthentication == 0 &&
+           !ODR_MASK_GET(apdu->u.initRequest->options, Z_Options_negotiationModel))
     {
-       // don't have a client session yet. Search in session w/o cookie
+       // anonymous sessions without cookie.
+       // if authentication is set it is NOT anonymous se we can't share them.
+       // If charset and lang negotiation is use it is NOT anonymous session too.
        for (c = parent->m_clientPool; c; c = c->m_next)
        {
-           assert (c->m_prev);
-           assert (*c->m_prev == c);
+           assert(c->m_prev);
+           assert(*c->m_prev == c);
            if (c->m_server == 0 && c->m_cookie == 0 && 
-               c->m_waiting == 0 &&
+               c->m_waiting == 0 && 
                !strcmp(m_proxyTarget, c->get_hostname()))
            {
                // found it in cache
-               yaz_log (LOG_LOG, "%sREUSE %d %s",
+               yaz_log (YLOG_LOG, "%sREUSE %d %s",
                         m_session_str, parent->m_seqno, c->get_hostname());
                
                c->m_seqno = parent->m_seqno;
@@ -486,34 +601,26 @@ Yaz_ProxyClient *Yaz_Proxy::get_client(Z_APDU *apdu, const char *cookie,
     {
        if (apdu->which != Z_APDU_initRequest)
        {
-           yaz_log (LOG_LOG, "%sno init request as first PDU", m_session_str);
+           yaz_log (YLOG_LOG, "%sno init request as first PDU", m_session_str);
            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);
-            }
-        }
+        if (initRequest->idAuthentication)
+       {
+           // the client uses authentication. We set the keepalive PDU
+           // to 0 so we don't cache it in releaseClient
+           m_keepalive_limit_pdu = 0;
+       }
        // 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");
+           yaz_log (YLOG_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,
+           yaz_log (YLOG_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++;
@@ -528,7 +635,7 @@ Yaz_ProxyClient *Yaz_Proxy::get_client(Z_APDU *apdu, const char *cookie,
            c = c_min;
            if (c->m_waiting || strcmp(m_proxyTarget, c->get_hostname()))
            {
-               yaz_log (LOG_LOG, "%sMAXCLIENTS %d Destroy %d",
+               yaz_log (YLOG_LOG, "%sMAXCLIENTS %d Destroy %d",
                         m_session_str, parent->m_max_clients, c->m_seqno);
                if (c->m_server && c->m_server != this)
                    delete c->m_server;
@@ -536,7 +643,7 @@ Yaz_ProxyClient *Yaz_Proxy::get_client(Z_APDU *apdu, const char *cookie,
            }
            else
            {
-               yaz_log (LOG_LOG, "%sMAXCLIENTS %d Reuse %d %d %s",
+               yaz_log (YLOG_LOG, "%sMAXCLIENTS %d Reuse %d %d %s",
                         m_session_str, parent->m_max_clients,
                         c->m_seqno, parent->m_seqno, c->get_hostname());
                xfree (c->m_cookie);
@@ -563,7 +670,7 @@ Yaz_ProxyClient *Yaz_Proxy::get_client(Z_APDU *apdu, const char *cookie,
        }
        else
        {
-           yaz_log (LOG_LOG, "%sNEW %d %s",
+           yaz_log (YLOG_LOG, "%sNEW %d %s",
                     m_session_str, parent->m_seqno, m_proxyTarget);
            c = new Yaz_ProxyClient(m_PDU_Observable->clone(), parent);
            c->m_next = parent->m_clientPool;
@@ -600,7 +707,7 @@ Yaz_ProxyClient *Yaz_Proxy::get_client(Z_APDU *apdu, const char *cookie,
        else
            c->set_APDU_yazlog(0);
     }
-    yaz_log (LOG_DEBUG, "get_client 3 %p %p", this, c);
+    yaz_log (YLOG_DEBUG, "get_client 3 %p %p", this, c);
     return c;
 }
 
@@ -614,24 +721,24 @@ void Yaz_Proxy::display_diagrecs(Z_DiagRec **pp, int num)
         Z_DiagRec *p = pp[i];
         if (p->which != Z_DiagRec_defaultFormat)
         {
-           yaz_log(LOG_LOG, "%sError no diagnostics", m_session_str);
+           yaz_log(YLOG_LOG, "%sError 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, "%sError unknown diagnostic set", m_session_str);
+           yaz_log(YLOG_LOG, "%sError unknown diagnostic set", m_session_str);
         switch (r->which)
         {
         case Z_DefaultDiagFormat_v2Addinfo:
-           yaz_log(LOG_LOG, "%sError %d %s:%s",
+           yaz_log(YLOG_LOG, "%sError %d %s:%s",
                    m_session_str,
                    *r->condition, diagbib1_str(*r->condition),
                    r->u.v2Addinfo);
             break;
         case Z_DefaultDiagFormat_v3Addinfo:
-           yaz_log(LOG_LOG, "%sError %d %s:%s",
+           yaz_log(YLOG_LOG, "%sError %d %s:%s",
                    m_session_str,
                    *r->condition, diagbib1_str(*r->condition),
                    r->u.v3Addinfo);
@@ -654,8 +761,8 @@ int Yaz_Proxy::convert_xsl(Z_NamePlusRecordList *p, Z_APDU *apdu)
 
 void Yaz_Proxy::convert_xsl_delay()
 {
-    Z_NamePlusRecord *npr = m_stylesheet_nprl->records[m_stylesheet_offset];
 #if HAVE_XSLT
+    Z_NamePlusRecord *npr = m_stylesheet_nprl->records[m_stylesheet_offset];
     if (npr->which == Z_NamePlusRecord_databaseRecord)
     {
        Z_External *r = npr->u.databaseRecord;
@@ -669,9 +776,10 @@ void Yaz_Proxy::convert_xsl_delay()
                r->u.octet_aligned->len);
 
            
-           yaz_log(LOG_LOG, "%sXSLT convert %d",
+           yaz_log(YLOG_LOG, "%sXSLT convert %d",
                    m_session_str, m_stylesheet_offset);
-           res = xsltApplyStylesheet(m_stylesheet_xsp, doc, 0);
+           res = xsltApplyStylesheet((xsltStylesheetPtr) m_stylesheet_xsp,
+                                     doc, 0);
 
            if (res)
            {
@@ -697,7 +805,7 @@ void Yaz_Proxy::convert_xsl_delay()
        m_stylesheet_nprl = 0;
 #if HAVE_XSLT
        if (m_stylesheet_xsp)
-           xsltFreeStylesheet(m_stylesheet_xsp);
+           xsltFreeStylesheet((xsltStylesheetPtr) m_stylesheet_xsp);
 #endif
        m_stylesheet_xsp = 0;
        timeout(m_client_idletime);
@@ -707,11 +815,154 @@ void Yaz_Proxy::convert_xsl_delay()
        timeout(0);
 }
 
-void Yaz_Proxy::convert_to_marcxml(Z_NamePlusRecordList *p)
+void Yaz_Proxy::convert_to_frontend_type(Z_NamePlusRecordList *p)
 {
-    int i;
+    if (m_frontend_type != VAL_NONE)
+    {
+       int i;
+       for (i = 0; i < p->num_records; i++)
+       {
+           Z_NamePlusRecord *npr = p->records[i];
+           if (npr->which == Z_NamePlusRecord_databaseRecord)
+           {
+               Z_External *r = npr->u.databaseRecord;
+               if (r->which == Z_External_octet)
+               {
+#if HAVE_USEMARCON
+                   if (m_usemarcon_ini_stage1 && *m_usemarcon_ini_stage1)
+                   {
+                       if (!m_usemarcon->m_stage1)
+                       {
+                           m_usemarcon->m_stage1 = new CDetails();
+                       }
+                       m_usemarcon->m_stage1->SetIniFileName(m_usemarcon_ini_stage1);
+                       m_usemarcon->m_stage1->SetMarcRecord((char*) r->u.octet_aligned->buf, r->u.octet_aligned->len);
+                       int res = m_usemarcon->m_stage1->Start();
+                       if (res == 0)
+                       {
+                           char *converted;
+                           int convlen;
+                           m_usemarcon->m_stage1->GetMarcRecord(converted, convlen);
+                           if (m_usemarcon_ini_stage2 && *m_usemarcon_ini_stage2)
+                           {
+                               if (!m_usemarcon->m_stage2)
+                               {
+                                   m_usemarcon->m_stage2 = new CDetails();
+                               }
+                               m_usemarcon->m_stage2->SetIniFileName(m_usemarcon_ini_stage2);
+                               m_usemarcon->m_stage2->SetMarcRecord(converted, convlen);
+                               res = m_usemarcon->m_stage2->Start();
+                               if (res == 0)
+                               {
+                                   free(converted);
+                                   m_usemarcon->m_stage2->GetMarcRecord(converted, convlen);
+                               }
+                               else
+                               {
+                                   yaz_log(YLOG_LOG, "%sUSEMARCON stage 2 error %d", m_session_str, res);
+                               }
+                           }
+                           npr->u.databaseRecord =
+                               z_ext_record(odr_encode(),
+                                            m_frontend_type,
+                                            converted,
+                                            strlen(converted));
+                           free(converted);
+                       }
+                       else
+                       {
+                           yaz_log(YLOG_LOG, "%sUSEMARCON stage 1 error %d", m_session_str, res);
+                       }
+                       continue;
+                   }
+#endif
+/* HAVE_USEMARCON */
+                   npr->u.databaseRecord =
+                       z_ext_record(odr_encode(),
+                                    m_frontend_type,
+                                    (char*) r->u.octet_aligned->buf,
+                                    r->u.octet_aligned->len);
+               }
+           }
+       }
+    }
+}
+
+void Yaz_Proxy::convert_records_charset(Z_NamePlusRecordList *p,
+                                       const char *backend_charset)
+{
+    yaz_log(YLOG_LOG, "%sconvert_to_marc", m_session_str);
+    int sel =  m_charset_converter->get_client_charset_selected();
+    const char *client_record_charset =
+       m_charset_converter->get_client_query_charset();
+    if (sel && backend_charset && client_record_charset &&
+       strcmp(backend_charset, client_record_charset))
+    {
+       int i;
+       yaz_iconv_t cd = yaz_iconv_open(client_record_charset,
+                                       backend_charset);
+       yaz_marc_t mt = yaz_marc_create();
+       yaz_marc_xml(mt, YAZ_MARC_ISO2709);
+       yaz_marc_iconv(mt, cd);
+       for (i = 0; i < p->num_records; i++)
+       {
+           Z_NamePlusRecord *npr = p->records[i];
+           if (npr->which == Z_NamePlusRecord_databaseRecord)
+           {
+               Z_External *r = npr->u.databaseRecord;
+               oident *ent = oid_getentbyoid(r->direct_reference);
+               if (!ent || ent->value == VAL_NONE)
+                   continue;
+
+               if (ent->value == VAL_SUTRS)
+               {
+                   WRBUF w = wrbuf_alloc();
+
+                   wrbuf_iconv_write(w, cd,  (char*) r->u.octet_aligned->buf,
+                                     r->u.octet_aligned->len);
+                   npr->u.databaseRecord =
+                       z_ext_record(odr_encode(), ent->value, wrbuf_buf(w),
+                                    wrbuf_len(w));
+                   wrbuf_free(w, 1);
+               }
+               else if (ent->value == VAL_TEXT_XML)
+               {
+                   ;
+               }
+               else if (r->which == Z_External_octet)
+               {
+                   int rlen;
+                   char *result;
+                   if (yaz_marc_decode_buf(mt,
+                                           (char*) r->u.octet_aligned->buf,
+                                           r->u.octet_aligned->len,
+                                           &result, &rlen))
+                   {
+                       npr->u.databaseRecord =
+                           z_ext_record(odr_encode(), ent->value, result, rlen);
+                       yaz_log(YLOG_LOG, "%sRecoding MARC record",
+                               m_session_str);
+                   }
+               }
+           }
+       }
+       if (cd)
+           yaz_iconv_close(cd);
+       yaz_marc_destroy(mt);
+    }
+    else
+    {
+       yaz_log(YLOG_LOG, "%sSkipping marc convert", m_session_str);
+    }
+}
 
-    yaz_iconv_t cd = yaz_iconv_open("UTF-8", "MARC-8");
+void Yaz_Proxy::convert_to_marcxml(Z_NamePlusRecordList *p,
+                                  const char *backend_charset)
+{
+    int i;
+    if (!backend_charset)
+       backend_charset = "MARC-8";
+    yaz_iconv_t cd = yaz_iconv_open("UTF-8", backend_charset);
     yaz_marc_t mt = yaz_marc_create();
     yaz_marc_xml(mt, YAZ_MARC_MARCXML);
     yaz_marc_iconv(mt, cd);
@@ -721,7 +972,18 @@ void Yaz_Proxy::convert_to_marcxml(Z_NamePlusRecordList *p)
        if (npr->which == Z_NamePlusRecord_databaseRecord)
        {
            Z_External *r = npr->u.databaseRecord;
-           if (r->which == Z_External_octet)
+           if (r->which == Z_External_OPAC)
+           {
+               WRBUF w = wrbuf_alloc();
+
+               yaz_display_OPAC(w, r->u.opac, 0);
+               npr->u.databaseRecord = z_ext_record(
+                   odr_encode(), VAL_TEXT_XML,
+                   wrbuf_buf(w), wrbuf_len(w)
+                   );
+               wrbuf_free(w, 1);
+           }
+           else if (r->which == Z_External_octet)
            {
                int rlen;
                char *result;
@@ -729,9 +991,8 @@ void Yaz_Proxy::convert_to_marcxml(Z_NamePlusRecordList *p)
                                        r->u.octet_aligned->len,
                                        &result, &rlen))
                {
-                   npr->u.databaseRecord = z_ext_record(odr_encode(),
-                                                        VAL_TEXT_XML,
-                                                        result, rlen);
+                   npr->u.databaseRecord =
+                       z_ext_record(odr_encode(), VAL_TEXT_XML, result, rlen);
                }
            }
        }
@@ -744,18 +1005,19 @@ void Yaz_Proxy::convert_to_marcxml(Z_NamePlusRecordList *p)
 void Yaz_Proxy::logtime()
 {
 #if HAVE_GETTIMEOFDAY
-    if (m_time_tv.tv_sec)
+    struct timeval *tv = (struct timeval*) m_time_tv;
+    if (tv->tv_sec)
     {
-       struct timeval tv;
-       gettimeofday(&tv, 0);
-       long diff = (tv.tv_sec - m_time_tv.tv_sec)*1000000 +
-           (tv.tv_usec - m_time_tv.tv_usec);
+       struct timeval tv1;
+       gettimeofday(&tv1, 0);
+       long diff = (tv1.tv_sec - tv->tv_sec)*1000000 +
+           (tv1.tv_usec - tv->tv_usec);
        if (diff >= 0)
-           yaz_log(LOG_LOG, "%sElapsed %ld.%03ld", m_session_str,
+           yaz_log(YLOG_LOG, "%sElapsed %ld.%03ld", m_session_str,
                    diff/1000000, (diff/1000)%1000);
     }
-    m_time_tv.tv_sec = 0;
-    m_time_tv.tv_usec = 0;
+    tv->tv_sec = 0;
+    tv->tv_usec = 0;
 #endif
 }
 
@@ -773,7 +1035,7 @@ int Yaz_Proxy::send_http_response(int code)
     
     if (m_log_mask & PROXY_LOG_REQ_CLIENT)
     {
-       yaz_log (LOG_LOG, "%sSending %s to client", m_session_str,
+       yaz_log (YLOG_LOG, "%sSending %s to client", m_session_str,
                 gdu_name(gdu));
     }
     int len;
@@ -819,7 +1081,7 @@ int Yaz_Proxy::send_srw_response(Z_SRW_PDU *srw_pdu)
                         soap_handlers, 0, m_s2z_stylesheet);
     if (m_log_mask & PROXY_LOG_REQ_CLIENT)
     {
-       yaz_log (LOG_LOG, "%sSending %s to client", m_session_str,
+       yaz_log (YLOG_LOG, "%sSending %s to client", m_session_str,
                 gdu_name(gdu));
     }
     int len;
@@ -924,8 +1186,8 @@ int Yaz_Proxy::send_srw_explain_response(Z_SRW_diagnostic *diagnostics,
     if (cfg)
     {
        int len;
-       char *b = cfg->get_explain(odr_encode(), 0 /* target */,
-                                  m_s2z_database, &len);
+       char *b = cfg->get_explain_doc(odr_encode(), 0 /* target */,
+                                      m_s2z_database, &len);
        if (b)
        {
            Z_SRW_PDU *res = yaz_srw_get(odr_encode(), Z_SRW_explain_response);
@@ -1007,7 +1269,7 @@ int Yaz_Proxy::send_PDU_convert(Z_APDU *apdu)
     {
        int len = 0;
        if (m_log_mask & PROXY_LOG_REQ_CLIENT)
-           yaz_log (LOG_LOG, "%sSending %s to client", m_session_str,
+           yaz_log (YLOG_LOG, "%sSending %s to client", m_session_str,
                     apdu_name(apdu));
        int r = send_Z_PDU(apdu, &len);
        m_bytes_sent += len;
@@ -1043,15 +1305,25 @@ int Yaz_Proxy::send_to_client(Z_APDU *apdu)
        {
            if (p && p->which == Z_Records_DBOSD)
            {
-               if (m_marcxml_flag)
-                   convert_to_marcxml(p->u.databaseOrSurDiagnostics);
+               if (m_backend_type
+#if HAVE_USEMARCON
+                   || m_usemarcon_ini_stage1 || m_usemarcon_ini_stage2
+#endif
+                   )
+                   convert_to_frontend_type(p->u.databaseOrSurDiagnostics);
+               if (m_marcxml_mode == marcxml)
+                   convert_to_marcxml(p->u.databaseOrSurDiagnostics,
+                                      m_backend_charset);
+               else
+                   convert_records_charset(p->u.databaseOrSurDiagnostics,
+                                           m_backend_charset);
                if (convert_xsl(p->u.databaseOrSurDiagnostics, apdu))
                    return 0;
                    
            }
            if (sr->resultCount)
            {
-               yaz_log(LOG_LOG, "%s%d hits", m_session_str,
+               yaz_log(YLOG_LOG, "%s%d hits", m_session_str,
                        *sr->resultCount);
                if (*sr->resultCount < 0)
                {
@@ -1081,14 +1353,28 @@ int Yaz_Proxy::send_to_client(Z_APDU *apdu)
        }
        if (p && p->which == Z_Records_DBOSD)
        {
-           if (m_marcxml_flag)
-               convert_to_marcxml(p->u.databaseOrSurDiagnostics);
+           if (m_backend_type 
+#if HAVE_USEMARCON
+               || m_usemarcon_ini_stage1 || m_usemarcon_ini_stage2
+#endif
+               )
+               convert_to_frontend_type(p->u.databaseOrSurDiagnostics);
+           if (m_marcxml_mode == marcxml)
+               convert_to_marcxml(p->u.databaseOrSurDiagnostics,
+                                  m_backend_charset);
+           else
+               convert_records_charset(p->u.databaseOrSurDiagnostics,
+                                       m_backend_charset);
            if (convert_xsl(p->u.databaseOrSurDiagnostics, apdu))
                return 0;
        }
     }
     else if (apdu->which == Z_APDU_initResponse)
     {
+       //Get and check negotiation record
+       //from init response.
+       handle_charset_lang_negotiation(apdu);
+       
        if (m_initRequest_options)
        {
            Z_Options *nopt = 
@@ -1130,6 +1416,7 @@ int Yaz_Proxy::send_to_client(Z_APDU *apdu)
                       m_initRequest_maximumRecordSize :
                       m_client->m_initResponse_maximumRecordSize);
     }
+    
     int r = send_PDU_convert(apdu);
     if (r)
        return r;
@@ -1148,7 +1435,7 @@ int Yaz_ProxyClient::send_to_target(Z_APDU *apdu)
     const char *apdu_name_tmp = apdu_name(apdu);
     int r = send_Z_PDU(apdu, &len);
     if (m_root->get_log_mask() & PROXY_LOG_REQ_SERVER)
-       yaz_log (LOG_LOG, "%sSending %s to %s %d bytes",
+       yaz_log (YLOG_LOG, "%sSending %s to %s %d bytes",
                 get_session_str(),
                 apdu_name_tmp, get_hostname(), len);
     m_bytes_sent += len;
@@ -1163,7 +1450,7 @@ Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
        int toget = *pr->numberOfRecordsRequested;
        int start = *pr->resultSetStartPoint;
 
-       yaz_log(LOG_LOG, "%sPresent %s %d+%d", m_session_str,
+       yaz_log(YLOG_LOG, "%sPresent %s %d+%d", m_session_str,
                pr->resultSetId, start, toget);
 
        if (*m_parent->m_optimize == '0')
@@ -1189,11 +1476,16 @@ Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
                return 0;
            }
            Z_NamePlusRecordList *npr;
+#if 0
+           yaz_log(YLOG_LOG, "%sCache lookup %d+%d syntax=%s",
+                   m_session_str, start, toget, yaz_z3950oid_to_str(
+                       pr->preferredRecordSyntax, &oclass));
+#endif
            if (m_client->m_cache.lookup (odr_encode(), &npr, start, toget,
                                          pr->preferredRecordSyntax,
                                          pr->recordComposition))
            {
-               yaz_log (LOG_LOG, "%sReturned cached records for present request", 
+               yaz_log (YLOG_LOG, "%sReturned cached records for present request", 
                         m_session_str);
                Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentResponse);
                new_apdu->u.presentResponse->referenceId = pr->referenceId;
@@ -1227,7 +1519,7 @@ Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
 
     char query_str[120];
     this_query->print(query_str, sizeof(query_str)-1);
-    yaz_log(LOG_LOG, "%sSearch %s", m_session_str, query_str);
+    yaz_log(YLOG_LOG, "%sSearch %s", m_session_str, query_str);
 
     if (*m_parent->m_optimize != '0' &&
        m_client->m_last_ok && m_client->m_last_query &&
@@ -1257,7 +1549,7 @@ Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
            if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
                                          sr->preferredRecordSyntax, comp))
            {
-               yaz_log (LOG_LOG, "%sReturned cached records for medium set",
+               yaz_log (YLOG_LOG, "%sReturned cached records for medium set",
                         m_session_str);
                Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
                new_apdu->u.searchResponse->referenceId = sr->referenceId;
@@ -1282,7 +1574,7 @@ Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
            {
                // medium Set
                // send present request (medium size)
-               yaz_log (LOG_LOG, "%sOptimizing search for medium set",
+               yaz_log (YLOG_LOG, "%sOptimizing search for medium set",
                         m_session_str);
 
                Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
@@ -1300,7 +1592,7 @@ Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
            m_client->m_last_resultCount <= 0)
        {
             // large set. Return pseudo-search response immediately
-           yaz_log (LOG_LOG, "%sOptimizing search for large set",
+           yaz_log (YLOG_LOG, "%sOptimizing search for large set",
                     m_session_str);
            Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
            new_apdu->u.searchResponse->referenceId = sr->referenceId;
@@ -1328,7 +1620,7 @@ Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
            if (m_client->m_cache.lookup (odr_encode(), &npr, 1, toget,
                                          sr->preferredRecordSyntax, comp))
            {
-               yaz_log (LOG_LOG, "%sReturned cached records for small set",
+               yaz_log (YLOG_LOG, "%sReturned cached records for small set",
                         m_session_str);
                Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
                new_apdu->u.searchResponse->referenceId = sr->referenceId;
@@ -1351,7 +1643,7 @@ Z_APDU *Yaz_Proxy::result_set_optimize(Z_APDU *apdu)
            }
            else
            {
-               yaz_log (LOG_LOG, "%sOptimizing search for small set",
+               yaz_log (YLOG_LOG, "%sOptimizing search for small set",
                         m_session_str);
                Z_APDU *new_apdu = create_Z_PDU(Z_APDU_presentRequest);
                Z_PresentRequest *pr = new_apdu->u.presentRequest;
@@ -1398,7 +1690,7 @@ void Yaz_Proxy::recv_GDU(Z_GDU *apdu, int len)
     m_bytes_recv += len;
     
     if (m_log_mask & PROXY_LOG_REQ_CLIENT)
-       yaz_log (LOG_LOG, "%sReceiving %s from client %d bytes",
+       yaz_log (YLOG_LOG, "%sReceiving %s from client %d bytes",
                 m_session_str, gdu_name(apdu), len);
 
     if (m_bw_hold_PDU)     // double incoming PDU. shutdown now.
@@ -1408,7 +1700,7 @@ void Yaz_Proxy::recv_GDU(Z_GDU *apdu, int len)
     m_pdu_stat.add_bytes(1);
 
 #if HAVE_GETTIMEOFDAY
-    gettimeofday(&m_time_tv, 0);
+    gettimeofday((struct timeval *) m_time_tv, 0);
 #endif
 
     int bw_total = m_bw_stat.get_total();
@@ -1430,9 +1722,10 @@ void Yaz_Proxy::recv_GDU(Z_GDU *apdu, int len)
            reduce = (reduce > nreduce) ? reduce : nreduce;
        }
     }
+    m_http_version = 0;
     if (reduce)  
     {
-       yaz_log(LOG_LOG, "%sdelay=%d bw=%d pdu=%d limit-bw=%d limit-pdu=%d",
+       yaz_log(YLOG_LOG, "%sdelay=%d bw=%d pdu=%d limit-bw=%d limit-pdu=%d",
                m_session_str, reduce, bw_total, pdu_total,
                m_bw_max, m_pdu_max);
        
@@ -1458,6 +1751,180 @@ void Yaz_Proxy::handle_max_record_retrieve(Z_APDU *apdu)
        }
     }
 }
+void Yaz_Proxy::handle_charset_lang_negotiation(Z_APDU *apdu)
+{
+    if (apdu->which == Z_APDU_initRequest)
+    {
+       yaz_log(YLOG_LOG, "%shandle_charset_lang_negotiation", 
+               m_session_str);
+       if (m_initRequest_options &&
+           !ODR_MASK_GET(m_initRequest_options, Z_Options_negotiationModel) &&
+           (m_proxy_negotiation_charset || m_proxy_negotiation_lang))
+       {
+           // There is no negotiation proposal from
+           // client's side. OK. The proxy negotiation
+           // in use, only.
+           Z_InitRequest *initRequest = apdu->u.initRequest;
+           Z_OtherInformation **otherInfo;  
+           Z_OtherInformationUnit *oi;
+           get_otherInfoAPDU(apdu, &otherInfo);
+           oi = update_otherInformation(otherInfo, 1, NULL, 0, 0);
+           if (oi)
+           {
+               ODR_MASK_SET(initRequest->options,
+                   Z_Options_negotiationModel);
+               oi->which = Z_OtherInfo_externallyDefinedInfo;    
+               oi->information.externallyDefinedInfo =
+               yaz_set_proposal_charneg(odr_encode(),
+                   (const char**)&m_proxy_negotiation_charset,
+                   m_proxy_negotiation_charset ? 1:0,
+                   (const char**)&m_proxy_negotiation_lang,
+                   m_proxy_negotiation_lang ? 1:0,
+                   1);
+           }
+       }
+       else if (m_initRequest_options &&
+                ODR_MASK_GET(m_initRequest_options,
+                             Z_Options_negotiationModel) &&
+                m_charset_converter->get_target_query_charset())
+       {
+           yaz_log(YLOG_LOG, "%sManaged charset negotiation: charset=%s",
+                   m_session_str,
+                   m_charset_converter->get_target_query_charset());
+           Z_InitRequest *initRequest = apdu->u.initRequest;
+           Z_CharSetandLanguageNegotiation *negotiation =
+               yaz_get_charneg_record (initRequest->otherInfo);        
+           if (negotiation &&
+               negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
+           {
+               NMEM nmem = nmem_create();
+               char **charsets = 0;
+               int num_charsets = 0;
+               char **langs = 0;
+               int num_langs = 0;
+               int selected = 0;
+               yaz_get_proposal_charneg (nmem, negotiation,
+                                         &charsets, &num_charsets,
+                                         &langs, &num_langs, &selected);
+               int i;
+               for (i = 0; i<num_charsets; i++)
+                   yaz_log(YLOG_LOG, "%scharset %s", m_session_str,
+                           charsets[i]);
+               for (i = 0; i<num_langs; i++)
+                   yaz_log(YLOG_LOG, "%slang %s", m_session_str,
+                           langs[i]);
+
+               const char *t_charset =
+                   m_charset_converter->get_target_query_charset();
+               // sweep through charsets and pick the first supported
+               // conversion
+               for (i = 0; i<num_charsets; i++)
+               {
+                   const char *c_charset = charsets[i];
+                   if (!odr_set_charset(odr_decode(), t_charset, c_charset))
+                       break;
+               }
+               if (i != num_charsets)
+               {
+                   // got one .. set up ODR for reverse direction
+                   const char *c_charset = charsets[i];
+                   odr_set_charset(odr_encode(), c_charset, t_charset);
+                   m_charset_converter->set_client_query_charset(c_charset);
+                   m_charset_converter->set_client_charset_selected(selected);
+               }
+               nmem_destroy(nmem);
+               ODR_MASK_CLEAR(m_initRequest_options, 
+                              Z_Options_negotiationModel);
+               yaz_del_charneg_record(&initRequest->otherInfo);
+           }
+           else
+           {
+               yaz_log(YLOG_WARN, "%sUnable to decode charset package",
+                       m_session_str);
+           }
+       }
+    }
+    else if (apdu->which == Z_APDU_initResponse)
+    {
+       Z_InitResponse *initResponse = apdu->u.initResponse;    
+       Z_OtherInformation **otherInfo;  
+       
+       if (ODR_MASK_GET(initResponse->options, Z_Options_negotiationModel))
+       {
+           char *charset = 0;
+           char *lang = 0;
+           int selected = 0;
+           
+           get_otherInfoAPDU(apdu, &otherInfo);
+           
+           if (!otherInfo && !(*otherInfo))
+               return;
+           
+           Z_CharSetandLanguageNegotiation *charneg =
+               yaz_get_charneg_record(*otherInfo);
+               
+           if (!charneg)
+               return;
+                               
+           yaz_get_response_charneg(m_referenceId_mem, charneg,
+               &charset, &lang, &selected);
+                               
+           yaz_log(YLOG_LOG, "%sAccepted charset - '%s' and lang - '%s'",
+               m_session_str, (charset)?charset:"none", (lang)?lang:"none");
+               
+           if (m_initRequest_options &&
+               ODR_MASK_GET(m_initRequest_options, Z_Options_negotiationModel))
+           {
+               yaz_log(YLOG_LOG, "%sClient's negotiation record in use",
+                   m_session_str);          
+           }
+           else if (m_proxy_negotiation_charset || m_proxy_negotiation_lang)
+           {
+               // negotiation-charset, negotiation-lang
+               // elements of config file in use.
+
+               yaz_log(YLOG_LOG, "%sProxy's negotiation record in use",
+                   m_session_str);
+
+               // clear negotiation option.
+               ODR_MASK_CLEAR(initResponse->options, Z_Options_negotiationModel);
+               
+               // Delete negotiation (charneg-3) entry.
+               yaz_del_charneg_record(otherInfo);
+           }
+       }
+       else
+       {
+           if (m_proxy_negotiation_charset || m_proxy_negotiation_lang)
+           {
+               yaz_log(YLOG_LOG, "%sTarget did not honor negotiation",
+                       m_session_str);
+           }
+           else if (m_charset_converter->get_client_query_charset())
+           {
+               Z_OtherInformation **otherInfo;  
+               Z_OtherInformationUnit *oi;
+               get_otherInfoAPDU(apdu, &otherInfo);
+               oi = update_otherInformation(otherInfo, 1, NULL, 0, 0);
+               if (oi)
+               {
+                   ODR_MASK_SET(initResponse->options,
+                                Z_Options_negotiationModel);
+                   ODR_MASK_SET(m_initRequest_options,
+                                Z_Options_negotiationModel);
+
+                   oi->which = Z_OtherInfo_externallyDefinedInfo;    
+                   oi->information.externallyDefinedInfo =
+                       yaz_set_response_charneg(
+                           odr_encode(),
+                           m_charset_converter->get_client_query_charset(),
+                           0 /* no lang */,
+                           m_charset_converter->get_client_charset_selected());
+               }
+           }
+       }
+    }
+}
 
 Z_Records *Yaz_Proxy::create_nonSurrogateDiagnostics(ODR odr,
                                                     int error,
@@ -1493,17 +1960,17 @@ Z_APDU *Yaz_Proxy::handle_query_transformation(Z_APDU *apdu)
        Z_SearchRequest *sr = apdu->u.searchRequest;
        char *addinfo = 0;
        
-       yaz_log(LOG_LOG, "%sCQL: %s", m_session_str,
+       yaz_log(YLOG_LOG, "%sCQL: %s", m_session_str,
                sr->query->u.type_104->u.cql);
 
        int r = m_cql2rpn.query_transform(sr->query->u.type_104->u.cql,
                                          &rpnquery, odr_encode(),
                                          &addinfo);
        if (r == -3)
-           yaz_log(LOG_LOG, "%sNo CQL to RPN table", m_session_str);
+           yaz_log(YLOG_LOG, "%sNo CQL to RPN table", m_session_str);
        else if (r)
        {
-           yaz_log(LOG_LOG, "%sCQL Conversion error %d", m_session_str, r);
+           yaz_log(YLOG_LOG, "%sCQL Conversion error %d", m_session_str, r);
            Z_APDU *new_apdu = create_Z_PDU(Z_APDU_searchResponse);
 
            new_apdu->u.searchResponse->referenceId = sr->referenceId;
@@ -1527,6 +1994,24 @@ Z_APDU *Yaz_Proxy::handle_query_transformation(Z_APDU *apdu)
     return apdu;
 }
 
+Z_APDU *Yaz_Proxy::handle_target_charset_conversion(Z_APDU *apdu)
+{
+    if (apdu->which == Z_APDU_searchRequest &&
+       apdu->u.searchRequest->query)
+    {
+       if (apdu->u.searchRequest->query->which == Z_Query_type_1
+           || apdu->u.searchRequest->query->which == Z_Query_type_101)
+       {
+           if (m_http_version)
+               m_charset_converter->set_client_query_charset("UTF-8");
+           Z_RPNQuery *rpnquery = apdu->u.searchRequest->query->u.type_1;
+           m_charset_converter->convert_type_1(rpnquery, odr_encode());
+       }
+    }
+    return apdu;
+}
+
+
 Z_APDU *Yaz_Proxy::handle_query_validation(Z_APDU *apdu)
 {
     if (apdu->which == Z_APDU_searchRequest)
@@ -1556,9 +2041,47 @@ Z_APDU *Yaz_Proxy::handle_query_validation(Z_APDU *apdu)
     return apdu;
 }
 
+int Yaz_Proxy::handle_authentication(Z_APDU *apdu)
+{
+    if (apdu->which != Z_APDU_initRequest)
+       return 1;  // pass if no init request
+    Z_InitRequest *req = apdu->u.initRequest;
+
+    Yaz_ProxyConfig *cfg = check_reconfigure();
+    if (!cfg)
+       return 1;  // pass if no config
+
+    int ret;
+    if (req->idAuthentication == 0)
+    {
+       ret = cfg->client_authentication(m_default_target, 0, 0, 0);
+    }
+    else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
+    {
+       ret = cfg->client_authentication(m_default_target,
+           req->idAuthentication->u.idPass->userId,
+           req->idAuthentication->u.idPass->groupId,
+           req->idAuthentication->u.idPass->password);
+    }
+    else if (req->idAuthentication->which == Z_IdAuthentication_open)
+    {
+       char user[64], pass[64];
+       *user = '\0';
+       *pass = '\0';
+       sscanf(req->idAuthentication->u.open, "%63[^/]/%63s", user, pass);
+       ret = cfg->client_authentication(m_default_target, user, 0, pass);
+    }
+    else
+       ret = cfg->client_authentication(m_default_target, 0, 0, 0);
+
+    cfg->target_authentication(m_default_target, odr_encode(), req);
+
+    return ret;
+}
+
 Z_APDU *Yaz_Proxy::handle_syntax_validation(Z_APDU *apdu)
 {
-    m_marcxml_flag = 0;
+    m_marcxml_mode = none;
     if (apdu->which == Z_APDU_searchRequest)
     {
        Z_SearchRequest *sr = apdu->u.searchRequest;
@@ -1574,19 +2097,31 @@ Z_APDU *Yaz_Proxy::handle_syntax_validation(Z_APDU *apdu)
            rc = &rc_temp;
        }
 
+       if (sr->preferredRecordSyntax)
+       {
+           struct oident *ent;
+           ent = oid_getentbyoid(sr->preferredRecordSyntax);
+           m_frontend_type = ent->value;
+       }
+       else
+           m_frontend_type = VAL_NONE;
+
        char *stylesheet_name = 0;
        if (cfg)
            err = cfg->check_syntax(odr_encode(),
                                    m_default_target,
                                    sr->preferredRecordSyntax, rc,
-                                   &addinfo, &stylesheet_name, &m_schema);
+                                   &addinfo, &stylesheet_name, &m_schema,
+                                   &m_backend_type, &m_backend_charset,
+                                    &m_usemarcon_ini_stage1,
+                                   &m_usemarcon_ini_stage2);
        if (stylesheet_name)
        {
            m_parent->low_socket_close();
 
 #if HAVE_XSLT
            if (m_stylesheet_xsp)
-               xsltFreeStylesheet(m_stylesheet_xsp);
+               xsltFreeStylesheet((xsltStylesheetPtr) m_stylesheet_xsp);
            m_stylesheet_xsp = xsltParseStylesheetFile((const xmlChar*)
                                                       stylesheet_name);
 #endif
@@ -1597,9 +2132,20 @@ Z_APDU *Yaz_Proxy::handle_syntax_validation(Z_APDU *apdu)
        }
        if (err == -1)
        {
-           sr->preferredRecordSyntax =
-               yaz_oidval_to_z3950oid(odr_encode(), CLASS_RECSYN, VAL_USMARC);
-           m_marcxml_flag = 1;
+           sr->smallSetElementSetNames = 0;
+           sr->mediumSetElementSetNames = 0;
+           m_marcxml_mode = marcxml;
+           if (m_backend_type)
+           {
+               
+               sr->preferredRecordSyntax =
+                   yaz_str_to_z3950oid(odr_encode(), CLASS_RECSYN,
+                                       m_backend_type);
+           }
+           else
+               sr->preferredRecordSyntax =
+                   yaz_oidval_to_z3950oid(odr_encode(), CLASS_RECSYN,
+                                          VAL_USMARC);
        }
        else if (err)
        {
@@ -1614,6 +2160,11 @@ Z_APDU *Yaz_Proxy::handle_syntax_validation(Z_APDU *apdu)
            
            return 0;
        }
+       else if (m_backend_type)
+       {
+           sr->preferredRecordSyntax =
+               yaz_str_to_z3950oid(odr_encode(), CLASS_RECSYN, m_backend_type);
+       }
     }
     else if (apdu->which == Z_APDU_presentRequest)
     {
@@ -1622,20 +2173,32 @@ Z_APDU *Yaz_Proxy::handle_syntax_validation(Z_APDU *apdu)
        char *addinfo = 0;
        Yaz_ProxyConfig *cfg = check_reconfigure();
 
+       if (pr->preferredRecordSyntax)
+       {
+           struct oident *ent;
+           ent = oid_getentbyoid(pr->preferredRecordSyntax);
+           m_frontend_type = ent->value;
+       }
+       else
+           m_frontend_type = VAL_NONE;
+
        char *stylesheet_name = 0;
        if (cfg)
            err = cfg->check_syntax(odr_encode(), m_default_target,
                                    pr->preferredRecordSyntax,
                                    pr->recordComposition,
-                                   &addinfo, &stylesheet_name, &m_schema);
+                                   &addinfo, &stylesheet_name, &m_schema,
+                                   &m_backend_type, &m_backend_charset,
+                                    &m_usemarcon_ini_stage1,
+                                   &m_usemarcon_ini_stage2
+                                   );
        if (stylesheet_name)
        {
            m_parent->low_socket_close();
 
 #if HAVE_XSLT
            if (m_stylesheet_xsp)
-               xsltFreeStylesheet(m_stylesheet_xsp);
-
+               xsltFreeStylesheet((xsltStylesheetPtr) m_stylesheet_xsp);
            m_stylesheet_xsp = xsltParseStylesheetFile((const xmlChar*)
                                                       stylesheet_name);
 #endif
@@ -1646,9 +2209,19 @@ Z_APDU *Yaz_Proxy::handle_syntax_validation(Z_APDU *apdu)
        }
        if (err == -1)
        {
-           pr->preferredRecordSyntax =
-               yaz_oidval_to_z3950oid(odr_decode(), CLASS_RECSYN, VAL_USMARC);
-           m_marcxml_flag = 1;
+           pr->recordComposition = 0;
+           m_marcxml_mode = marcxml;
+           if (m_backend_type)
+           {
+               
+               pr->preferredRecordSyntax =
+                   yaz_str_to_z3950oid(odr_encode(), CLASS_RECSYN,
+                                       m_backend_type);
+           }
+           else
+               pr->preferredRecordSyntax =
+                   yaz_oidval_to_z3950oid(odr_encode(), CLASS_RECSYN,
+                                          VAL_USMARC);
        }
        else if (err)
        {
@@ -1664,6 +2237,11 @@ Z_APDU *Yaz_Proxy::handle_syntax_validation(Z_APDU *apdu)
            
            return 0;
        }
+       else if (m_backend_type)
+       {
+           pr->preferredRecordSyntax =
+               yaz_str_to_z3950oid(odr_encode(), CLASS_RECSYN, m_backend_type);
+       }
     }
     return apdu;
 }
@@ -1679,6 +2257,97 @@ Z_ElementSetNames *Yaz_Proxy::mk_esn_from_schema(ODR o, const char *schema)
     return esn;
 }
 
+void Yaz_Proxy::srw_get_client(const char *db, const char **backend_db)
+{
+    const char *t = 0;
+    Yaz_ProxyConfig *cfg = check_reconfigure();
+    if (cfg)
+       t = cfg->get_explain_name(db, backend_db);
+
+    if (m_client && m_default_target && t && strcmp(m_default_target, t))
+    {
+       releaseClient();
+    }
+    
+    if (t)
+    {
+       xfree(m_default_target);
+       m_default_target = xstrdup(t);
+    }
+}
+
+int Yaz_Proxy::file_access(Z_HTTP_Request *hreq)
+{
+    struct stat sbuf;
+    if (strcmp(hreq->method, "GET"))
+       return 0;
+    if (hreq->path[0] != '/')
+    {
+       yaz_log(YLOG_WARN, "Bad path: %s", hreq->path);
+       return 0;
+    }
+    const char *cp = hreq->path;
+    while (*cp)
+    {
+       if (*cp == '/' && strchr("/.", cp[1]))
+       {
+           yaz_log(YLOG_WARN, "Bad path: %s", hreq->path);
+           return 0;
+       }
+       cp++;
+    }
+    const char *fname = hreq->path+1;
+    if (stat(fname, &sbuf))
+    {
+       yaz_log(YLOG_WARN|YLOG_ERRNO, "%s: stat failed", fname);
+       return 0;
+    }
+    if ((sbuf.st_mode & S_IFMT) != S_IFREG)
+    {
+       yaz_log(YLOG_WARN, "%s: not a regular file", fname);
+       return 0;
+    }
+    if (sbuf.st_size > (off_t) 1000000)
+    {
+       yaz_log(YLOG_WARN, "%s: too large for transfer", fname);
+       return 0;
+    }
+    
+    ODR o = odr_encode();
+    Yaz_ProxyConfig *cfg = check_reconfigure();
+    const char *ctype = cfg->check_mime_type(fname);
+    Z_GDU *gdu = z_get_HTTP_Response(o, 200);
+    Z_HTTP_Response *hres = gdu->u.HTTP_Response;
+    if (m_http_version)
+       hres->version = odr_strdup(o, m_http_version);
+    z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
+    if (m_http_keepalive)
+        z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
+    else
+       timeout(0);
+
+    hres->content_len = sbuf.st_size;
+    hres->content_buf = (char*) odr_malloc(o, hres->content_len);
+    FILE *f = fopen(fname, "rb");
+    if (f)
+    {
+       fread(hres->content_buf, 1, hres->content_len, f);
+       fclose(f);
+    }
+    else
+    {
+       return 0;
+    }
+    if (m_log_mask & PROXY_LOG_REQ_CLIENT)
+    {
+       yaz_log (YLOG_LOG, "%sSending file %s to client", m_session_str,
+                fname);
+    }
+    int len;
+    send_GDU(gdu, &len);
+    return 1;
+}
+       
 void Yaz_Proxy::handle_incoming_HTTP(Z_HTTP_Request *hreq)
 {
     if (m_s2z_odr_init)
@@ -1718,10 +2387,15 @@ void Yaz_Proxy::handle_incoming_HTTP(Z_HTTP_Request *hreq)
     char *charset = 0;
     Z_SRW_diagnostic *diagnostic = 0;
     int num_diagnostic = 0;
-    if (yaz_srw_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
-                      &charset) == 0
-       || yaz_sru_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
-                         &charset, &diagnostic, &num_diagnostic) == 0)
+
+    if (file_access(hreq))
+    {
+       return;
+    }
+    else if (yaz_srw_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
+                           &charset) == 0
+            || yaz_sru_decode(hreq, &srw_pdu, &soap_package, odr_decode(),
+                              &charset, &diagnostic, &num_diagnostic) == 0)
     {
        m_s2z_odr_init = odr_createmem(ODR_ENCODE);
        m_s2z_odr_search = odr_createmem(ODR_ENCODE);
@@ -1736,6 +2410,9 @@ void Yaz_Proxy::handle_incoming_HTTP(Z_HTTP_Request *hreq)
        {
            Z_SRW_searchRetrieveRequest *srw_req = srw_pdu->u.request;
 
+           const char *backend_db = srw_req->database;
+           srw_get_client(srw_req->database, &backend_db);
+
            m_s2z_database = odr_strdup(m_s2z_odr_init, srw_req->database);
            // recordXPath unsupported.
            if (srw_req->recordXPath)
@@ -1786,7 +2463,7 @@ void Yaz_Proxy::handle_incoming_HTTP(Z_HTTP_Request *hreq)
            z_searchRequest->databaseNames = (char**)
                odr_malloc(m_s2z_odr_search, sizeof(char *));
            z_searchRequest->databaseNames[0] = odr_strdup(m_s2z_odr_search,
-                                                          srw_req->database);
+                                                          backend_db);
            
            // query transformation
            Z_Query *query = (Z_Query *)
@@ -1821,8 +2498,8 @@ void Yaz_Proxy::handle_incoming_HTTP(Z_HTTP_Request *hreq)
                    const char *pqf_msg;
                    size_t off;
                    int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
-                   yaz_log(LOG_LOG, "%*s^\n", off+4, "");
-                   yaz_log(LOG_LOG, "Bad PQF: %s (code %d)\n", pqf_msg, code);
+                   yaz_log(YLOG_LOG, "%*s^\n", off+4, "");
+                   yaz_log(YLOG_LOG, "Bad PQF: %s (code %d)\n", pqf_msg, code);
                    
                    send_to_srw_client_error(10, 0);
                    return;
@@ -1913,6 +2590,9 @@ void Yaz_Proxy::handle_incoming_HTTP(Z_HTTP_Request *hreq)
        {
            Z_SRW_explainRequest *srw_req = srw_pdu->u.explain_request;
 
+           const char *backend_db = srw_req->database;
+           srw_get_client(srw_req->database, &backend_db);
+
            m_s2z_database = odr_strdup(m_s2z_odr_init, srw_req->database);
 
            // save stylesheet
@@ -1971,10 +2651,124 @@ void Yaz_Proxy::handle_incoming_HTTP(Z_HTTP_Request *hreq)
            send_to_srw_client_error(4, 0);
         }
     }
-    int len = 0;
-    Z_GDU *p = z_get_HTTP_Response(odr_encode(), 400);
-    timeout(0);
-    send_GDU(p, &len);
+    send_http_response(400);
+}
+
+void Yaz_Proxy::handle_init(Z_APDU *apdu)
+{
+    Z_OtherInformation **oi;
+    get_otherInfoAPDU(apdu, &oi);
+
+    if (apdu->u.initRequest->implementationId)
+       yaz_log(YLOG_LOG, "%simplementationId: %s",
+               m_session_str, apdu->u.initRequest->implementationId);
+    if (apdu->u.initRequest->implementationName)
+       yaz_log(YLOG_LOG, "%simplementationName: %s",
+               m_session_str, apdu->u.initRequest->implementationName);
+    if (apdu->u.initRequest->implementationVersion)
+       yaz_log(YLOG_LOG, "%simplementationVersion: %s",
+               m_session_str, apdu->u.initRequest->implementationVersion);
+    if (m_initRequest_apdu == 0)
+    {
+       if (m_initRequest_mem)
+           nmem_destroy(m_initRequest_mem);
+       
+       m_initRequest_apdu = apdu;
+       m_initRequest_mem = odr_extract_mem(odr_decode());
+       
+       m_initRequest_preferredMessageSize = *apdu->u.initRequest->
+           preferredMessageSize;
+       *apdu->u.initRequest->preferredMessageSize = 1024*1024;
+       m_initRequest_maximumRecordSize = *apdu->u.initRequest->
+           maximumRecordSize;
+       *apdu->u.initRequest->maximumRecordSize = 1024*1024;
+       
+       // Save proposal charsets and langs.
+       if (ODR_MASK_GET(apdu->u.initRequest->options,
+                        Z_Options_negotiationModel))
+       {
+           Z_CharSetandLanguageNegotiation *charSetandLangRecord =
+               yaz_get_charneg_record(*oi);
+           
+           yaz_get_proposal_charneg(m_referenceId_mem,
+                                    charSetandLangRecord,
+                                    &m_initRequest_oi_negotiation_charsets,
+                                    &m_initRequest_oi_negotiation_num_charsets,
+                                    &m_initRequest_oi_negotiation_langs,
+                                    &m_initRequest_oi_negotiation_num_langs,
+                                    &m_initRequest_oi_negotiation_selected);
+           
+           for (int i = 0; i<m_initRequest_oi_negotiation_num_charsets; i++)
+           {
+               yaz_log(YLOG_LOG, "%scharacters set proposal: %s",
+                       m_session_str,(m_initRequest_oi_negotiation_charsets[i])?
+                       m_initRequest_oi_negotiation_charsets[i]:"none");
+           }
+           for (int i=0; i<m_initRequest_oi_negotiation_num_langs; i++)
+           {
+               yaz_log(YLOG_LOG, "%slanguages proposal: %s",
+                       m_session_str, (m_initRequest_oi_negotiation_langs[i])?
+                       m_initRequest_oi_negotiation_langs[i]:"none");
+           }
+           yaz_log(YLOG_LOG, "%sselected proposal: %d (boolean)",
+                   m_session_str, m_initRequest_oi_negotiation_selected);
+       }       
+       // save init options for the response..
+       m_initRequest_options = apdu->u.initRequest->options;
+       
+       apdu->u.initRequest->options = 
+           (Odr_bitmask *)nmem_malloc(m_initRequest_mem,
+                                      sizeof(Odr_bitmask));
+       ODR_MASK_ZERO(apdu->u.initRequest->options);
+       int i;
+       for (i = 0; i<= 24; i++)
+           ODR_MASK_SET(apdu->u.initRequest->options, i);
+       // check negotiation option
+       if (!ODR_MASK_GET(m_initRequest_options,
+                         Z_Options_negotiationModel))
+       {
+           ODR_MASK_CLEAR(apdu->u.initRequest->options,
+                          Z_Options_negotiationModel);
+       }
+       ODR_MASK_CLEAR(apdu->u.initRequest->options,
+                      Z_Options_concurrentOperations);
+       // make new version
+       m_initRequest_version = apdu->u.initRequest->protocolVersion;
+       apdu->u.initRequest->protocolVersion = 
+           (Odr_bitmask *)nmem_malloc(m_initRequest_mem,
+                                      sizeof(Odr_bitmask));
+       ODR_MASK_ZERO(apdu->u.initRequest->protocolVersion);
+       
+       for (i = 0; i<= 8; i++)
+           ODR_MASK_SET(apdu->u.initRequest->protocolVersion, i);
+    }
+    if (m_client->m_init_flag)
+    {
+       if (handle_init_response_for_invalid_session(apdu))
+           return;
+       if (m_client->m_initResponse)
+       {
+           Z_APDU *apdu2 = m_client->m_initResponse;
+           apdu2->u.initResponse->otherInfo = 0;
+           if (m_client->m_cookie && *m_client->m_cookie)
+               set_otherInformationString(apdu2, VAL_COOKIE, 1,
+                                          m_client->m_cookie);
+           apdu2->u.initResponse->referenceId =
+               apdu->u.initRequest->referenceId;
+           apdu2->u.initResponse->options = m_client->m_initResponse_options;
+           apdu2->u.initResponse->protocolVersion = 
+               m_client->m_initResponse_version;
+           
+           send_to_client(apdu2);
+           return;
+       }
+    }
+    m_client->m_init_flag = 1;
+    
+    Auth_Msg *m = new Auth_Msg;
+    m->m_apdu = apdu;
+    m->m_proxy = this;
+    m_my_thread->put(m);
 }
 
 void Yaz_Proxy::handle_incoming_Z_PDU(Z_APDU *apdu)
@@ -2006,86 +2800,30 @@ void Yaz_Proxy::handle_incoming_Z_PDU(Z_APDU *apdu)
     m_client = get_client(apdu, get_cookie(oi), get_proxy(oi));
     if (!m_client)
     {
-       delete this;
-       return;
+       if (m_http_version)
+       {
+           send_http_response(404);
+           return;
+       }
+       else
+       {
+           delete this;
+           return;
+       }
     }
+    
     m_client->m_server = this;
 
     if (apdu->which == Z_APDU_initRequest)
-    {
-       if (apdu->u.initRequest->implementationId)
-           yaz_log(LOG_LOG, "%simplementationId: %s",
-                   m_session_str, apdu->u.initRequest->implementationId);
-       if (apdu->u.initRequest->implementationName)
-           yaz_log(LOG_LOG, "%simplementationName: %s",
-                   m_session_str, apdu->u.initRequest->implementationName);
-       if (apdu->u.initRequest->implementationVersion)
-           yaz_log(LOG_LOG, "%simplementationVersion: %s",
-                   m_session_str, apdu->u.initRequest->implementationVersion);
-       if (m_initRequest_apdu == 0)
-       {
-           if (m_initRequest_mem)
-               nmem_destroy(m_initRequest_mem);
-           m_initRequest_apdu = apdu;
-           m_initRequest_mem = odr_extract_mem(odr_decode());
-
-           m_initRequest_preferredMessageSize = *apdu->u.initRequest->
-               preferredMessageSize;
-           *apdu->u.initRequest->preferredMessageSize = 1024*1024;
-           m_initRequest_maximumRecordSize = *apdu->u.initRequest->
-               maximumRecordSize;
-           *apdu->u.initRequest->maximumRecordSize = 1024*1024;
-
-           // save init options for the response..
-           m_initRequest_options = apdu->u.initRequest->options;
-           
-           apdu->u.initRequest->options = 
-               (Odr_bitmask *)nmem_malloc(m_initRequest_mem,
-                                          sizeof(Odr_bitmask));
-           ODR_MASK_ZERO(apdu->u.initRequest->options);
-           int i;
-           for (i = 0; i<= 24; i++)
-               ODR_MASK_SET(apdu->u.initRequest->options, i);
-           ODR_MASK_CLEAR(apdu->u.initRequest->options,
-                          Z_Options_negotiationModel);
-           ODR_MASK_CLEAR(apdu->u.initRequest->options,
-                          Z_Options_concurrentOperations);
-
-           // make new version
-           m_initRequest_version = apdu->u.initRequest->protocolVersion;
-           apdu->u.initRequest->protocolVersion = 
-               (Odr_bitmask *)nmem_malloc(m_initRequest_mem,
-                                          sizeof(Odr_bitmask));
-           ODR_MASK_ZERO(apdu->u.initRequest->protocolVersion);
+       handle_init(apdu);
+    else
+       handle_incoming_Z_PDU_2(apdu);
+}
 
-           for (i = 0; i<= 8; i++)
-               ODR_MASK_SET(apdu->u.initRequest->protocolVersion, i);
-       }
-       if (m_client->m_init_flag)
-       {
-           if (handle_init_response_for_invalid_session(apdu))
-               return;
-           if (m_client->m_initResponse)
-           {
-               Z_APDU *apdu2 = m_client->m_initResponse;
-               apdu2->u.initResponse->otherInfo = 0;
-               if (m_client->m_cookie && *m_client->m_cookie)
-                   set_otherInformationString(apdu2, VAL_COOKIE, 1,
-                                              m_client->m_cookie);
-               apdu2->u.initResponse->referenceId =
-                   apdu->u.initRequest->referenceId;
-               apdu2->u.initResponse->options = m_client->m_initResponse_options;
-               apdu2->u.initResponse->protocolVersion = 
-                   m_client->m_initResponse_version;
-               
-               send_to_client(apdu2);
-               return;
-           }
-       }
-       m_client->m_init_flag = 1;
-    }
+void Yaz_Proxy::handle_incoming_Z_PDU_2(Z_APDU *apdu)
+{
     handle_max_record_retrieve(apdu);
-
+    
     if (apdu)
        apdu = handle_syntax_validation(apdu);
 
@@ -2093,20 +2831,29 @@ void Yaz_Proxy::handle_incoming_Z_PDU(Z_APDU *apdu)
        apdu = handle_query_transformation(apdu);
 
     if (apdu)
+       apdu = handle_target_charset_conversion(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;
     }
+    // Add otherInformation entry in APDU if
+    // negotiation is in use.
+    if (apdu)
+       handle_charset_lang_negotiation(apdu);
 
-    // delete other info part from PDU before sending to target
+    // delete other info construct completely if 0 elements
+    Z_OtherInformation **oi;
     get_otherInfoAPDU(apdu, &oi);
-    if (oi)
+    if (oi && *oi && (*oi)->num_elements == 0)
         *oi = 0;
 
     if (apdu->which == Z_APDU_presentRequest &&
@@ -2132,8 +2879,10 @@ void Yaz_Proxy::connectNotify()
 {
 }
 
-void Yaz_Proxy::shutdown()
+void Yaz_Proxy::releaseClient()
 {
+    xfree(m_proxyTarget);
+    m_proxyTarget = 0;
     m_invalid_session = 0;
     // only keep if keep_alive flag is set...
     if (m_client && 
@@ -2141,39 +2890,45 @@ void Yaz_Proxy::shutdown()
        m_client->m_bytes_recv+m_client->m_bytes_sent < m_keepalive_limit_bw &&
        m_client->m_waiting == 0)
     {
-        yaz_log(LOG_LOG, "%sShutdown (client to proxy) keepalive %s",
+        yaz_log(YLOG_LOG, "%sShutdown (client to proxy) keepalive %s",
                 m_session_str,
                  m_client->get_hostname());
-       yaz_log(LOG_LOG, "%sbw=%d pdu=%d limit-bw=%d limit-pdu=%d",
+       yaz_log(YLOG_LOG, "%sbw=%d pdu=%d limit-bw=%d limit-pdu=%d",
                m_session_str, m_client->m_pdu_recv,
                m_client->m_bytes_sent + m_client->m_bytes_recv,
                m_keepalive_limit_bw, m_keepalive_limit_pdu);
         assert (m_client->m_waiting != 2);
        // Tell client (if any) that no server connection is there..
        m_client->m_server = 0;
-       m_invalid_session = 0;
+       m_client = 0;
     }
     else if (m_client)
     {
-        yaz_log (LOG_LOG, "%sShutdown (client to proxy) close %s",
+        yaz_log (YLOG_LOG, "%sShutdown (client to proxy) close %s",
                 m_session_str,
                  m_client->get_hostname());
         assert (m_client->m_waiting != 2);
        delete m_client;
+       m_client = 0;
     }
     else if (!m_parent)
     {
-        yaz_log (LOG_LOG, "%sshutdown (client to proxy) bad state",
+        yaz_log (YLOG_LOG, "%sshutdown (client to proxy) bad state",
                 m_session_str);
         assert (m_parent);
     }
     else 
     {
-        yaz_log (LOG_LOG, "%sShutdown (client to proxy)",
+        yaz_log (YLOG_LOG, "%sShutdown (client to proxy)",
                 m_session_str);
     }
     if (m_parent)
        m_parent->pre_init();
+}
+
+void Yaz_Proxy::shutdown()
+{
+    releaseClient();
     delete this;
 }
 
@@ -2186,7 +2941,7 @@ const char *Yaz_ProxyClient::get_session_str()
 
 void Yaz_ProxyClient::shutdown()
 {
-    yaz_log (LOG_LOG, "%sShutdown (proxy to target) %s", get_session_str(),
+    yaz_log (YLOG_LOG, "%sShutdown (proxy to target) %s", get_session_str(),
             get_hostname());
     delete m_server;
     delete this;
@@ -2195,7 +2950,7 @@ void Yaz_ProxyClient::shutdown()
 void Yaz_Proxy::failNotify()
 {
     inc_request_no();
-    yaz_log (LOG_LOG, "%sConnection closed by client",
+    yaz_log (YLOG_LOG, "%sConnection closed by client",
             get_session_str());
     shutdown();
 }
@@ -2204,7 +2959,7 @@ void Yaz_ProxyClient::failNotify()
 {
     if (m_server)
        m_server->inc_request_no();
-    yaz_log (LOG_LOG, "%sConnection closed by target %s", 
+    yaz_log (YLOG_LOG, "%sConnection closed by target %s", 
             get_session_str(), get_hostname());
     shutdown();
 }
@@ -2213,7 +2968,7 @@ void Yaz_ProxyClient::connectNotify()
 {
     const char *s = get_session_str();
     const char *h = get_hostname();
-    yaz_log (LOG_LOG, "%sConnection accepted by %s timeout=%d", s, h,
+    yaz_log (YLOG_LOG, "%sConnection accepted by %s timeout=%d", s, h,
             m_target_idletime);
     timeout(m_target_idletime);
     if (!m_server)
@@ -2276,6 +3031,9 @@ void Yaz_Proxy::pre_init()
     int keepalive_limit_bw, keepalive_limit_pdu;
     int pre_init;
     const char *cql2rpn = 0;
+    const char *authentication = 0;
+    const char *negotiation_charset = 0;
+    const char *negotiation_lang = 0;
 
     Yaz_ProxyConfig *cfg = check_reconfigure();
 
@@ -2293,7 +3051,11 @@ void Yaz_Proxy::pre_init()
                                          &keepalive_limit_bw,
                                          &keepalive_limit_pdu,
                                          &pre_init,
-                                         &cql2rpn) ; i++)
+                                         &cql2rpn,
+                                         &authentication,
+                                         &negotiation_charset,
+                                         &negotiation_lang,
+                                         0) ; i++)
     {
        if (pre_init)
        {
@@ -2323,7 +3085,7 @@ void Yaz_Proxy::pre_init()
                            other++;
                    }
                }
-               yaz_log(LOG_LOG, "%spre-init %s %s use=%d other=%d spare=%d "
+               yaz_log(YLOG_LOG, "%spre-init %s %s use=%d other=%d spare=%d "
                        "sparew=%d preinit=%d",m_session_str,
                        name, zurl_in_use[j], in_use, other,
                        spare, spare_waiting, pre_init);
@@ -2378,7 +3140,7 @@ void Yaz_Proxy::timeoutNotify()
        {
            inc_request_no();
 
-           yaz_log (LOG_LOG, "%sTimeout (client to proxy)", m_session_str);
+           yaz_log (YLOG_LOG, "%sTimeout (client to proxy)", m_session_str);
            shutdown();
        }
     }
@@ -2400,7 +3162,7 @@ void Yaz_ProxyClient::timeoutNotify()
     if (m_server)
        m_server->inc_request_no();
 
-    yaz_log (LOG_LOG, "%sTimeout (proxy to target) %s", get_session_str(),
+    yaz_log (YLOG_LOG, "%sTimeout (proxy to target) %s", get_session_str(),
             get_hostname());
     m_waiting = 1;
     m_root->pre_init();
@@ -2490,7 +3252,7 @@ void Yaz_ProxyClient::recv_Z_PDU(Z_APDU *apdu, int len)
     m_pdu_recv++;
     m_waiting = 0;
     if (m_root->get_log_mask() & PROXY_LOG_REQ_SERVER)
-       yaz_log (LOG_LOG, "%sReceiving %s from %s %d bytes", get_session_str(),
+       yaz_log (YLOG_LOG, "%sReceiving %s from %s %d bytes", get_session_str(),
                 apdu_name(apdu), get_hostname(), len);
     if (apdu->which == Z_APDU_initResponse)
     {
@@ -2605,7 +3367,7 @@ int Yaz_Proxy::server(const char *addr)
     int r = Yaz_Z_Assoc::server(addr);
     if (!r)
     {
-       yaz_log(LOG_LOG, "%sStarted proxy " 
+       yaz_log(YLOG_LOG, "%sStarted proxy " 
 #ifdef VERSION
            VERSION 
 #endif