Pazpar2 compiles on Windows. But does not yet work
[pazpar2-moved-to-github.git] / src / logic.c
index 4ec42cf..8abdcae 100644 (file)
@@ -1,7 +1,5 @@
-/* $Id: logic.c,v 1.32 2007-05-23 21:58:28 adam Exp $
-   Copyright (c) 2006-2007, Index Data.
-
-This file is part of Pazpar2.
+/* This file is part of Pazpar2.
+   Copyright (C) 2006-2008 Index Data
 
 Pazpar2 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
@@ -14,10 +12,10 @@ FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 for more details.
 
 You should have received a copy of the GNU General Public License
-along with Pazpar2; see the file LICENSE.  If not, write to the
-Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA.
- */
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+*/
 
 /** \file logic.c
     \brief high-level logic; mostly user sessions and settings
@@ -26,10 +24,18 @@ Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+#if HAVE_SYS_TIME_H
 #include <sys/time.h>
+#endif
+#if HAVE_UNISTD_H
 #include <unistd.h>
+#endif
+#if HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
+#endif
+#if HAVE_NETDB_H
 #include <netdb.h>
+#endif
 #include <signal.h>
 #include <ctype.h>
 #include <assert.h>
@@ -45,12 +51,11 @@ Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #include <yaz/nmem.h>
 #include <yaz/query-charset.h>
 #include <yaz/querytowrbuf.h>
-#if YAZ_VERSIONL >= 0x020163
 #include <yaz/oid_db.h>
-#endif
+#include <yaz/snprintf.h>
 
 #if HAVE_CONFIG_H
-#include "cconfig.h"
+#include <config.h>
 #endif
 
 #define USE_TIMING 0
@@ -58,7 +63,9 @@ Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #include <yaz/timing.h>
 #endif
 
+#if HAVE_NETINET_IN_H
 #include <netinet/in.h>
+#endif
 
 #include "pazpar2.h"
 #include "eventl.h"
@@ -66,12 +73,13 @@ Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 #include "termlists.h"
 #include "reclists.h"
 #include "relevance.h"
-#include "config.h"
 #include "database.h"
 #include "client.h"
 #include "settings.h"
 #include "normalize7bit.h"
 
+#define TERMLIST_HIGH_SCORE 25
+
 #define MAX_CHUNK 15
 
 // Note: Some things in this structure will eventually move to configuration
@@ -79,24 +87,23 @@ struct parameters global_parameters =
 {
     "",
     "",
-    "",
-    "",
+    "", 
     0,
-    0, /* dump_records */
-    0, /* debug_mode */
-    30,
+    0,   // dump_records
+    0,   // debug_mode
+    30,  // operations timeout 
     "81",
     "Index Data PazPar2",
     VERSION,
-    600, // 10 minutes
-    60,
+    60,   // session timeout 
     100,
     MAX_CHUNK,
     0,
-    0
+    0,
+    180, // Z39.50 session timeout
+    15   // Connect timeout
 };
 
-
 // Recursively traverse query structure to extract terms.
 void pull_terms(NMEM nmem, struct ccl_rpn_node *n, char **termlist, int *num)
 {
@@ -106,20 +113,20 @@ void pull_terms(NMEM nmem, struct ccl_rpn_node *n, char **termlist, int *num)
 
     switch (n->kind)
     {
-        case CCL_RPN_AND:
-        case CCL_RPN_OR:
-        case CCL_RPN_NOT:
-        case CCL_RPN_PROX:
-            pull_terms(nmem, n->u.p[0], termlist, num);
-            pull_terms(nmem, n->u.p[1], termlist, num);
-            break;
-        case CCL_RPN_TERM:
-            nmem_strsplit(nmem, " ", n->u.t.term, &words, &numwords);
-            for (i = 0; i < numwords; i++)
-                termlist[(*num)++] = words[i];
-            break;
-        default: // NOOP
-            break;
+    case CCL_RPN_AND:
+    case CCL_RPN_OR:
+    case CCL_RPN_NOT:
+    case CCL_RPN_PROX:
+        pull_terms(nmem, n->u.p[0], termlist, num);
+        pull_terms(nmem, n->u.p[1], termlist, num);
+        break;
+    case CCL_RPN_TERM:
+        nmem_strsplit(nmem, " ", n->u.t.term, &words, &numwords);
+        for (i = 0; i < numwords; i++)
+            termlist[(*num)++] = words[i];
+        break;
+    default: // NOOP
+        break;
     }
 }
 
@@ -144,105 +151,255 @@ static void add_facet(struct session *s, const char *type, const char *value)
 
         s->termlists[i].name = nmem_strdup(s->nmem, type);
         s->termlists[i].termlist 
-            = termlist_create(s->nmem, s->expected_maxrecs, 15);
+            = termlist_create(s->nmem, s->expected_maxrecs,
+                              TERMLIST_HIGH_SCORE);
         s->num_termlists = i + 1;
     }
     termlist_insert(s->termlists[i].termlist, value);
 }
 
-xmlDoc *normalize_record(struct session_database *sdb, Z_External *rec)
+xmlDoc *record_to_xml(struct session_database *sdb, Z_External *rec)
 {
-    struct database_retrievalmap *m;
     struct database *db = sdb->database;
-    xmlNode *res;
-    xmlDoc *rdoc;
+    xmlDoc *rdoc = 0;
+    const Odr_oid *oid = rec->direct_reference;
 
-    // First normalize to XML
-    if (sdb->yaz_marc)
+    /* convert response record to XML somehow */
+    if (rec->which == Z_External_octet && oid
+        && !oid_oidcmp(oid, yaz_oid_recsyn_xml))
     {
-        char *buf;
-        int len;
-        if (rec->which != Z_External_octet)
+        /* xml already */
+        rdoc = xmlParseMemory((char*) rec->u.octet_aligned->buf,
+                              rec->u.octet_aligned->len);
+        if (!rdoc)
         {
-            yaz_log(YLOG_WARN, "Unexpected external branch, probably BER %s",
+            yaz_log(YLOG_FATAL, "Non-wellformed XML received from %s",
                     db->url);
             return 0;
         }
-        buf = (char*) rec->u.octet_aligned->buf;
-        len = rec->u.octet_aligned->len;
-        if (yaz_marc_read_iso2709(sdb->yaz_marc, buf, len) < 0)
+    }
+    else if (rec->which == Z_External_OPAC)
+    {
+        if (!sdb->yaz_marc)
         {
-            yaz_log(YLOG_WARN, "Failed to decode MARC %s", db->url);
+            yaz_log(YLOG_WARN, "MARC decoding not configured");
             return 0;
         }
-
-        yaz_marc_write_using_libxml2(sdb->yaz_marc, 1);
-        if (yaz_marc_write_xml(sdb->yaz_marc, &res,
-                    "http://www.loc.gov/MARC21/slim", 0, 0) < 0)
+        else
         {
-            yaz_log(YLOG_WARN, "Failed to encode as XML %s",
-                    db->url);
+            /* OPAC gets converted to XML too */
+            WRBUF wrbuf_opac = wrbuf_alloc();
+            /* MARCXML inside the OPAC XML. Charset is in effect because we
+               use the yaz_marc handle */
+            yaz_marc_xml(sdb->yaz_marc, YAZ_MARC_MARCXML);
+            yaz_opac_decode_wrbuf(sdb->yaz_marc, rec->u.opac, wrbuf_opac);
+            
+            rdoc = xmlParseMemory((char*) wrbuf_buf(wrbuf_opac),
+                                  wrbuf_len(wrbuf_opac));
+            if (!rdoc)
+            {
+                yaz_log(YLOG_WARN, "Unable to parse OPAC XML");
+                /* Was used to debug bug #1348 */
+#if 0
+                FILE *f = fopen("/tmp/opac.xml.txt", "wb");
+                if (f)
+                {
+                    fwrite(wrbuf_buf(wrbuf_opac), 1, wrbuf_len(wrbuf_opac), f);
+                    fclose(f);
+                }
+#endif
+            }
+            wrbuf_destroy(wrbuf_opac);
+        }
+    }
+    else if (oid && yaz_oid_is_iso2709(oid))
+    {
+        /* ISO2709 gets converted to MARCXML */
+        if (!sdb->yaz_marc)
+        {
+            yaz_log(YLOG_WARN, "MARC decoding not configured");
             return 0;
         }
-        rdoc = xmlNewDoc((xmlChar *) "1.0");
-        xmlDocSetRootElement(rdoc, res);
-
+        else
+        {
+            xmlNode *res;
+            char *buf;
+            int len;
+            
+            if (rec->which != Z_External_octet)
+            {
+                yaz_log(YLOG_WARN, "Unexpected external branch, probably BER %s",
+                        db->url);
+                return 0;
+            }
+            buf = (char*) rec->u.octet_aligned->buf;
+            len = rec->u.octet_aligned->len;
+            if (yaz_marc_read_iso2709(sdb->yaz_marc, buf, len) < 0)
+            {
+                yaz_log(YLOG_WARN, "Failed to decode MARC %s", db->url);
+                return 0;
+            }
+            
+            if (yaz_marc_write_xml(sdb->yaz_marc, &res,
+                                   "http://www.loc.gov/MARC21/slim", 0, 0) < 0)
+            {
+                yaz_log(YLOG_WARN, "Failed to encode as XML %s",
+                        db->url);
+                return 0;
+            }
+            rdoc = xmlNewDoc((xmlChar *) "1.0");
+            xmlDocSetRootElement(rdoc, res);
+        }
     }
     else
     {
+        char oid_name_buf[OID_STR_MAX];
+        const char *oid_name = yaz_oid_to_string_buf(oid, 0, oid_name_buf);
         yaz_log(YLOG_FATAL, 
-                "Unknown native_syntax in normalize_record from %s",
-                db->url);
+                "Unable to handle record of type %s from %s", 
+                oid_name, db->url);
         return 0;
     }
-
-    if (global_parameters.dump_records){
-        fprintf(stderr, 
-                "Input Record (normalized) from %s\n----------------\n",
-                db->url);
+    
+    if (global_parameters.dump_records)
+    {
+        FILE *lf = yaz_log_file();
+        if (lf)
+        {
+            yaz_log(YLOG_LOG, "Un-normalized record from %s", db->url);
 #if LIBXML_VERSION >= 20600
-        xmlDocFormatDump(stderr, rdoc, 1);
+            xmlDocFormatDump(lf, rdoc, 1);
 #else
-        xmlDocDump(stderr, rdoc);
+            xmlDocDump(lf, rdoc);
 #endif
+            fprintf(lf, "\n");
+        }
     }
+    return rdoc;
+}
 
-    for (m = sdb->map; m; m = m->next){
-        xmlDoc *new = 0;
+#define MAX_XSLT_ARGS 16
 
+// Add static values from session database settings if applicable
+static void insert_settings_parameters(struct session_database *sdb,
+                                       struct session *se, char **parms)
+{
+    struct conf_service *service = global_parameters.server->service;
+    int i;
+    int nparms = 0;
+    int offset = 0;
+
+    for (i = 0; i < service->num_metadata; i++)
+    {
+        struct conf_metadata *md = &service->metadata[i];
+        int setting;
+
+        if (md->setting == Metadata_setting_parameter &&
+            (setting = settings_offset(md->name)) > 0)
         {
-            xmlNodePtr root = 0;
-            new = xsltApplyStylesheet(m->stylesheet, rdoc, 0);
-            root= xmlDocGetRootElement(new);
-        if (!new || !root || !(root->children))
-        {
-            yaz_log(YLOG_WARN, "XSLT transformation failed from %s",
-                    sdb->database->url);
-            xmlFreeDoc(new);
-            xmlFreeDoc(rdoc);
-            return 0;
+            const char *val = session_setting_oneval(sdb, setting);
+            if (val && nparms < MAX_XSLT_ARGS)
+            {
+                char *buf;
+                int len = strlen(val);
+                buf = nmem_malloc(se->nmem, len + 3);
+                buf[0] = '\'';
+                strcpy(buf + 1, val);
+                buf[len+1] = '\'';
+                buf[len+2] = '\0';
+                parms[offset++] = md->name;
+                parms[offset++] = buf;
+                nparms++;
+            }
         }
+    }
+    parms[offset] = 0;
+}
+
+// Add static values from session database settings if applicable
+static void insert_settings_values(struct session_database *sdb, xmlDoc *doc)
+{
+    struct conf_service *service = global_parameters.server->service;
+    int i;
+
+    for (i = 0; i < service->num_metadata; i++)
+    {
+        struct conf_metadata *md = &service->metadata[i];
+        int offset;
+
+        if (md->setting == Metadata_setting_postproc &&
+            (offset = settings_offset(md->name)) > 0)
+        {
+            const char *val = session_setting_oneval(sdb, offset);
+            if (val)
+            {
+                xmlNode *r = xmlDocGetRootElement(doc);
+                xmlNode *n = xmlNewTextChild(r, 0, (xmlChar *) "metadata",
+                                             (xmlChar *) val);
+                xmlSetProp(n, (xmlChar *) "type", (xmlChar *) md->name);
+            }
         }
-   
-        xmlFreeDoc(rdoc);
-        rdoc = new;
     }
-    if (global_parameters.dump_records)
+}
+
+xmlDoc *normalize_record(struct session_database *sdb, struct session *se,
+                         Z_External *rec)
+{
+    struct database_retrievalmap *m;
+    xmlDoc *rdoc = record_to_xml(sdb, rec);
+    if (rdoc)
     {
-        fprintf(stderr, "Record from %s\n----------------\n", 
-                sdb->database->url);
+        for (m = sdb->map; m; m = m->next)
+        {
+            xmlDoc *new = 0;
+            
+            {
+                xmlNodePtr root = 0;
+                char *parms[MAX_XSLT_ARGS*2+1];
+
+                insert_settings_parameters(sdb, se, parms);
+
+                new = xsltApplyStylesheet(m->stylesheet, rdoc, (const char **) parms);
+                root= xmlDocGetRootElement(new);
+                if (!new || !root || !(root->children))
+                {
+                    yaz_log(YLOG_WARN, "XSLT transformation failed from %s",
+                            sdb->database->url);
+                    xmlFreeDoc(new);
+                    xmlFreeDoc(rdoc);
+                    return 0;
+                }
+            }
+            
+            xmlFreeDoc(rdoc);
+            rdoc = new;
+        }
+
+        insert_settings_values(sdb, rdoc);
+
+        if (global_parameters.dump_records)
+        {
+            FILE *lf = yaz_log_file();
+            
+            if (lf)
+            {
+                yaz_log(YLOG_LOG, "Normalized record from %s", 
+                        sdb->database->url);
 #if LIBXML_VERSION >= 20600
-        xmlDocFormatDump(stderr, rdoc, 1);
+                xmlDocFormatDump(lf, rdoc, 1);
 #else
-        xmlDocDump(stderr, rdoc);
+                xmlDocDump(lf, rdoc);
 #endif
+                fprintf(lf, "\n");
+            }
+        }
     }
     return rdoc;
 }
 
 // Retrieve first defined value for 'name' for given database.
 // Will be extended to take into account user associated with session
-char *session_setting_oneval(struct session_database *db, int offset)
+const char *session_setting_oneval(struct session_database *db, int offset)
 {
     if (!db->settings[offset])
         return "";
@@ -254,7 +411,7 @@ char *session_setting_oneval(struct session_database *db, int offset)
 // Initialize YAZ Map structures for MARC-based targets
 static int prepare_yazmarc(struct session_database *sdb)
 {
-    char *s;
+    const char *s;
 
     if (!sdb->settings)
     {
@@ -294,7 +451,7 @@ static int prepare_yazmarc(struct session_database *sdb)
 // setting. However, this is not a realistic use scenario.
 static int prepare_map(struct session *se, struct session_database *sdb)
 {
-   char *s;
+    const char *s;
 
     if (!sdb->settings)
     {
@@ -306,7 +463,30 @@ static int prepare_map(struct session *se, struct session_database *sdb)
         char **stylesheets;
         struct database_retrievalmap **m = &sdb->map;
         int num, i;
+        char auto_stylesheet[256];
 
+        if (!strcmp(s, "auto"))
+        {
+            const char *request_syntax = session_setting_oneval(
+                sdb, PZ_REQUESTSYNTAX);
+            if (request_syntax)
+            {
+                char *cp;
+                yaz_snprintf(auto_stylesheet, sizeof(auto_stylesheet),
+                             "%s.xsl", request_syntax);
+                for (cp = auto_stylesheet; *cp; cp++)
+                {
+                    /* deliberately only consider ASCII */
+                    if (*cp > 32 && *cp < 127)
+                        *cp = tolower(*cp);
+                }
+                s = auto_stylesheet;
+            }
+            else
+            {
+                yaz_log(YLOG_WARN, "No pz:requestsyntax for auto stylesheet");
+            }
+        }
         nmem_strsplit(se->session_nmem, ",", s, &stylesheets, &num);
         for (i = 0; i < num; i++)
         {
@@ -314,7 +494,7 @@ static int prepare_map(struct session *se, struct session_database *sdb)
             (*m)->next = 0;
             if (!((*m)->stylesheet = conf_load_stylesheet(stylesheets[i])))
             {
-                yaz_log(YLOG_FATAL, "Unable to load stylesheet: %s",
+                yaz_log(YLOG_FATAL|YLOG_ERRNO, "Unable to load stylesheet: %s",
                         stylesheets[i]);
                 return -1;
             }
@@ -351,21 +531,51 @@ static int prepare_session_database(struct session *se,
     return 0;
 }
 
+// called if watch should be removed because http_channel is to be destroyed
+static void session_watch_cancel(void *data, struct http_channel *c,
+                                 void *data2)
+{
+    struct session_watchentry *ent = data;
+
+    ent->fun = 0;
+    ent->data = 0;
+    ent->obs = 0;
+}
 
-void session_set_watch(struct session *s, int what, 
-                       session_watchfun fun, void *data)
+// set watch. Returns 0=OK, -1 if watch is already set
+int session_set_watch(struct session *s, int what, 
+                      session_watchfun fun, void *data,
+                      struct http_channel *chan)
 {
+    if (s->watchlist[what].fun)
+        return -1;
     s->watchlist[what].fun = fun;
     s->watchlist[what].data = data;
+    s->watchlist[what].obs = http_add_observer(chan, &s->watchlist[what],
+                                               session_watch_cancel);
+    return 0;
 }
 
 void session_alert_watch(struct session *s, int what)
 {
-    if (!s->watchlist[what].fun)
-        return;
-    (*s->watchlist[what].fun)(s->watchlist[what].data);
-    s->watchlist[what].fun = 0;
-    s->watchlist[what].data = 0;
+    if (s->watchlist[what].fun)
+    {
+        /* our watch is no longer associated with http_channel */
+        void *data;
+        session_watchfun fun;
+
+        http_remove_observer(s->watchlist[what].obs);
+        fun = s->watchlist[what].fun;
+        data = s->watchlist[what].data;
+
+        /* reset watch before fun is invoked - in case fun wants to set
+           it again */
+        s->watchlist[what].fun = 0;
+        s->watchlist[what].data = 0;
+        s->watchlist[what].obs = 0;
+
+        fun(data);
+    }
 }
 
 //callback for grep_databases
@@ -441,47 +651,60 @@ static struct database_criterion *parse_filter(NMEM m, const char *buf)
     return res;
 }
 
-char *search(struct session *se, char *query, char *filter)
+enum pazpar2_error_code search(struct session *se,
+                               char *query, char *filter,
+                               const char **addinfo)
 {
     int live_channels = 0;
+    int no_working = 0;
+    int no_failed = 0;
     struct client *cl;
     struct database_criterion *criteria;
 
     yaz_log(YLOG_DEBUG, "Search");
 
+    *addinfo = 0;
     nmem_reset(se->nmem);
+    se->relevance = 0;
+    se->total_records = se->total_hits = se->total_merged = 0;
+    se->reclist = 0;
+    se->num_termlists = 0;
     criteria = parse_filter(se->nmem, filter);
     se->requestid++;
     live_channels = select_targets(se, criteria);
     if (live_channels)
     {
         int maxrecs = live_channels * global_parameters.toget;
-        se->num_termlists = 0;
         se->reclist = reclist_create(se->nmem, maxrecs);
-        // This will be initialized in send_search()
-        se->total_records = se->total_hits = se->total_merged = 0;
         se->expected_maxrecs = maxrecs;
     }
     else
-        return "NOTARGETS";
-
-    se->relevance = 0;
+        return PAZPAR2_NO_TARGETS;
 
     for (cl = se->clients; cl; cl = client_next_in_session(cl))
     {
         if (prepare_session_database(se, client_get_database(cl)) < 0)
-            return "CONFIG_ERROR";
-        // Query must parse for all targets
-        if (client_parse_query(cl, query) < 0)  
-            return "QUERY";
+        {
+            *addinfo = client_get_database(cl)->database->url;
+            return PAZPAR2_CONFIG_TARGET;
+        }
+        // Parse query for target
+        if (client_parse_query(cl, query) < 0)
+            no_failed++;
+        else
+        {
+            no_working++;
+            client_prep_connection(cl);
+        }
     }
 
-    for (cl = se->clients; cl; cl = client_next_in_session(cl))
+    // If no queries could be mapped, we signal an error
+    if (no_working == 0)
     {
-        client_prep_connection(cl);
+        *addinfo = "query";
+        return PAZPAR2_MALFORMED_PARAMETER_VALUE;
     }
-
-    return 0;
+    return PAZPAR2_NO_ERROR;
 }
 
 // Creates a new session_database object for a database
@@ -494,17 +717,7 @@ static void session_init_databases_fun(void *context, struct database *db)
 
     new->database = db;
     new->yaz_marc = 0;
-
-#ifdef HAVE_ICU
-    if (global_parameters.server && global_parameters.server->icu_chn)
-            new->pct
-                = pp2_charset_create(global_parameters.server->icu_chn);
-        else
-            new->pct = pp2_charset_create(0);
-#else // HAVE_ICU
-    new->pct = pp2_charset_create(0);
-#endif // HAVE_ICU
-
+    
     new->map = 0;
     new->settings 
         = nmem_malloc(se->session_nmem, sizeof(struct settings *) * num);
@@ -528,8 +741,6 @@ static void session_database_destroy(struct session_database *sdb)
         xsltFreeStylesheet(m->stylesheet);
     if (sdb->yaz_marc)
         yaz_marc_destroy(sdb->yaz_marc);
-    if (sdb->pct)
-        pp2_charset_destroy(sdb->pct);
 }
 
 // Initialize session_database list -- this represents this session's view
@@ -537,7 +748,7 @@ static void session_database_destroy(struct session_database *sdb)
 void session_init_databases(struct session *se)
 {
     se->databases = 0;
-    grep_databases(se, 0, session_init_databases_fun);
+    predef_grep_databases(se, 0, session_init_databases_fun);
 }
 
 // Probably session_init_databases_fun should be refactored instead of
@@ -579,10 +790,10 @@ void session_apply_setting(struct session *se, char *dbname, char *setting,
     }
     // Jakub: This breaks the filter setting.
     /*if (offset == PZ_ID)
-    {
-        yaz_log(YLOG_WARN, "No need to set pz:id setting. Ignoring");
-        return;
-    }*/
+      {
+      yaz_log(YLOG_WARN, "No need to set pz:id setting. Ignoring");
+      return;
+      }*/
     new->precedence = 0;
     new->target = dbname;
     new->name = setting;
@@ -594,23 +805,23 @@ void session_apply_setting(struct session *se, char *dbname, char *setting,
     // (happens when a search starts and client connections are prepared)
     switch (offset)
     {
-        case PZ_NATIVESYNTAX:
-            if (sdb->yaz_marc)
-            {
-                yaz_marc_destroy(sdb->yaz_marc);
-                sdb->yaz_marc = 0;
-            }
-            break;
-        case PZ_XSLT:
-            if (sdb->map)
-            {
-                struct database_retrievalmap *m;
-                // We don't worry about the map structure -- it's in nmem
-                for (m = sdb->map; m; m = m->next)
-                    xsltFreeStylesheet(m->stylesheet);
-                sdb->map = 0;
-            }
-            break;
+    case PZ_NATIVESYNTAX:
+        if (sdb->yaz_marc)
+        {
+            yaz_marc_destroy(sdb->yaz_marc);
+            sdb->yaz_marc = 0;
+        }
+        break;
+    case PZ_XSLT:
+        if (sdb->map)
+        {
+            struct database_retrievalmap *m;
+            // We don't worry about the map structure -- it's in nmem
+            for (m = sdb->map; m; m = m->next)
+                xsltFreeStylesheet(m->stylesheet);
+            sdb->map = 0;
+        }
+        break;
     }
 }
 
@@ -618,7 +829,6 @@ void destroy_session(struct session *s)
 {
     struct session_database *sdb;
 
-    yaz_log(YLOG_LOG, "Destroying session");
     while (s->clients)
         client_destroy(s->clients);
     for (sdb = s->databases; sdb; sdb = sdb->next)
@@ -634,6 +844,7 @@ struct session *new_session(NMEM nmem)
 
     yaz_log(YLOG_DEBUG, "New Pazpar2 session");
     
+    session->relevance = 0;
     session->total_hits = 0;
     session->total_records = 0;
     session->num_termlists = 0;
@@ -644,25 +855,30 @@ struct session *new_session(NMEM nmem)
     session->session_nmem = nmem;
     session->nmem = nmem_create();
     session->wrbuf = wrbuf_alloc();
-    session_init_databases(session);
+    session->databases = 0;
     for (i = 0; i <= SESSION_WATCH_MAX; i++)
     {
         session->watchlist[i].data = 0;
         session->watchlist[i].fun = 0;
     }
-
     return session;
 }
 
-struct hitsbytarget *hitsbytarget(struct session *se, int *count)
+struct hitsbytarget *hitsbytarget(struct session *se, int *count, NMEM nmem)
 {
-    static struct hitsbytarget res[1000]; // FIXME MM
+    struct hitsbytarget *res = 0;
     struct client *cl;
+    size_t sz = 0;
+
+    for (cl = se->clients; cl; cl = client_next_in_session(cl))
+        sz++;
 
+    res = nmem_malloc(nmem, sizeof(*res) * sz);
     *count = 0;
     for (cl = se->clients; cl; cl = client_next_in_session(cl))
     {
-        char *name = session_setting_oneval(client_get_database(cl), PZ_NAME);
+        const char *name = session_setting_oneval(client_get_database(cl),
+                                                  PZ_NAME);
 
         res[*count].id = client_get_database(cl)->database->url;
         res[*count].name = *name ? name : "Unknown";
@@ -673,7 +889,6 @@ struct hitsbytarget *hitsbytarget(struct session *se, int *count)
         res[*count].connected  = client_get_connection(cl) ? 1 : 0;
         (*count)++;
     }
-
     return res;
 }
 
@@ -700,13 +915,13 @@ void report_nmem_stats(void)
 }
 #endif
 
-struct record_cluster *show_single(struct session *s, int id)
+struct record_cluster *show_single(struct session *s, const char *id)
 {
     struct record_cluster *r;
 
     reclist_rewind(s->reclist);
     while ((r = reclist_read_record(s->reclist)))
-        if (r->recid == id)
+        if (!strcmp(r->recid, id))
             return r;
     return 0;
 }
@@ -716,41 +931,51 @@ struct record_cluster **show(struct session *s, struct reclist_sortparms *sp,
                              NMEM nmem_show)
 {
     struct record_cluster **recs = nmem_malloc(nmem_show, *num 
-                                       * sizeof(struct record_cluster *));
+                                               * sizeof(struct record_cluster *));
     struct reclist_sortparms *spp;
     int i;
 #if USE_TIMING    
     yaz_timing_t t = yaz_timing_create();
 #endif
 
-    for (spp = sp; spp; spp = spp->next)
-        if (spp->type == Metadata_sortkey_relevance)
-        {
-            relevance_prepare_read(s->relevance, s->reclist);
-            break;
-        }
-    reclist_sort(s->reclist, sp);
-
-    *total = s->reclist->num_records;
-    *sumhits = s->total_hits;
-
-    for (i = 0; i < start; i++)
-        if (!reclist_read_record(s->reclist))
-        {
-            *num = 0;
-            recs = 0;
-            break;
-        }
-
-    for (i = 0; i < *num; i++)
+    if (!s->relevance)
     {
-        struct record_cluster *r = reclist_read_record(s->reclist);
-        if (!r)
+        *num = 0;
+        *total = 0;
+        *sumhits = 0;
+        recs = 0;
+    }
+    else
+    {
+        for (spp = sp; spp; spp = spp->next)
+            if (spp->type == Metadata_sortkey_relevance)
+            {
+                relevance_prepare_read(s->relevance, s->reclist);
+                break;
+            }
+        reclist_sort(s->reclist, sp);
+        
+        *total = s->reclist->num_records;
+        *sumhits = s->total_hits;
+        
+        for (i = 0; i < start; i++)
+            if (!reclist_read_record(s->reclist))
+            {
+                *num = 0;
+                recs = 0;
+                break;
+            }
+        
+        for (i = 0; i < *num; i++)
         {
-            *num = i;
-            break;
+            struct record_cluster *r = reclist_read_record(s->reclist);
+            if (!r)
+            {
+                *num = i;
+                break;
+            }
+            recs[i] = r;
         }
-        recs[i] = r;
     }
 #if USE_TIMING
     yaz_timing_stop(t);
@@ -774,14 +999,14 @@ void statistics(struct session *se, struct statistics *stat)
             stat->num_no_connection++;
         switch (client_get_state(cl))
         {
-            case Client_Connecting: stat->num_connecting++; break;
-            case Client_Initializing: stat->num_initializing++; break;
-            case Client_Searching: stat->num_searching++; break;
-            case Client_Presenting: stat->num_presenting++; break;
-            case Client_Idle: stat->num_idle++; break;
-            case Client_Failed: stat->num_failed++; break;
-            case Client_Error: stat->num_error++; break;
-            default: break;
+        case Client_Connecting: stat->num_connecting++; break;
+        case Client_Initializing: stat->num_initializing++; break;
+        case Client_Searching: stat->num_searching++; break;
+        case Client_Presenting: stat->num_presenting++; break;
+        case Client_Idle: stat->num_idle++; break;
+        case Client_Failed: stat->num_failed++; break;
+        case Client_Error: stat->num_error++; break;
+        default: break;
         }
         count++;
     }
@@ -834,38 +1059,6 @@ void start_proxy(void)
     http_set_proxyaddr(hp, ser->myurl ? ser->myurl : "");
 }
 
-void start_zproxy(void)
-{
-    struct conf_server *ser = global_parameters.server;
-
-    if (*global_parameters.zproxy_override){
-        yaz_log(YLOG_LOG, "Z39.50 proxy  %s", 
-                global_parameters.zproxy_override);
-        return;
-    }
-
-    else if (ser->zproxy_host || ser->zproxy_port)
-    {
-        char hp[128] = "";
-
-        strcpy(hp, ser->zproxy_host ? ser->zproxy_host : "");
-        if (ser->zproxy_port)
-        {
-            if (*hp)
-                strcat(hp, ":");
-            else
-                strcat(hp, "@:");
-
-            sprintf(hp + strlen(hp), "%d", ser->zproxy_port);
-        }
-        strcpy(global_parameters.zproxy_override, hp);
-        yaz_log(YLOG_LOG, "Z39.50 proxy  %s", 
-                global_parameters.zproxy_override);
-
-    }
-    else
-        return;
-}
 
 // Master list of connections we're handling events to
 static IOCHAN channel_list = 0; 
@@ -880,10 +1073,41 @@ void pazpar2_event_loop()
     event_loop(&channel_list);
 }
 
+static struct record_metadata *record_metadata_init(
+    NMEM nmem, char *value, enum conf_metadata_type type)
+{
+    struct record_metadata *rec_md = record_metadata_create(nmem);
+    if (type == Metadata_type_generic)
+    {
+        char * p = value;
+        p = normalize7bit_generic(p, " ,/.:([");
+        
+        rec_md->data.text.disp = nmem_strdup(nmem, p);
+        rec_md->data.text.sort = 0;
+    }
+    else if (type == Metadata_type_year || type == Metadata_type_date)
+    {
+        int first, last;
+        int longdate = 0;
+
+        if (type == Metadata_type_date)
+            longdate = 1;
+        if (extract7bit_dates((char *) value, &first, &last, longdate) < 0)
+            return 0;
+
+        rec_md->data.number.min = first;
+        rec_md->data.number.max = last;
+    }
+    else
+        return 0;
+    return rec_md;
+}
+
 struct record *ingest_record(struct client *cl, Z_External *rec,
                              int record_no)
 {
-    xmlDoc *xdoc = normalize_record(client_get_database(cl), rec);
+    xmlDoc *xdoc = normalize_record(client_get_database(cl),
+                                    client_get_session(cl), rec);
     xmlNode *root, *n;
     struct record *record;
     struct record_cluster *cluster;
@@ -892,6 +1116,9 @@ struct record *ingest_record(struct client *cl, Z_External *rec,
     xmlChar *type = 0;
     xmlChar *value = 0;
     struct conf_service *service = global_parameters.server->service;
+    const char *norm_str = 0;
+    pp2_relevance_token_t prt = 0;
+    WRBUF norm_wr = 0;
 
     if (!xdoc)
         return 0;
@@ -903,21 +1130,40 @@ struct record *ingest_record(struct client *cl, Z_External *rec,
         xmlFreeDoc(xdoc);
         return 0;
     }
-
+    
     record = record_create(se->nmem, 
-                           service->num_metadata, service->num_sortkeys);
-    record_assign_client(record, cl);
+                           service->num_metadata, service->num_sortkeys, cl,
+                           record_no);
+
+    prt = pp2_relevance_tokenize(
+        global_parameters.server->mergekey_pct, (const char *) mergekey);
 
-    mergekey_norm = (xmlChar *) nmem_strdup(se->nmem, (char*) mergekey);
-    xmlFree(mergekey);
-    normalize7bit_mergekey((char *) mergekey_norm, 0);
 
+    norm_wr = wrbuf_alloc();
+    
+    while ((norm_str = pp2_relevance_token_next(prt)))
+    {
+        if (*norm_str)
+        {
+            if (wrbuf_len(norm_wr))
+                wrbuf_puts(norm_wr, " ");
+            wrbuf_puts(norm_wr, norm_str);
+        }
+    }
+        
+    mergekey_norm = (xmlChar *)nmem_strdup(se->nmem, wrbuf_cstr(norm_wr));
+    wrbuf_destroy(norm_wr);
+
+    pp2_relevance_token_destroy(prt);
+
+    xmlFree(mergekey);
+    
     cluster = reclist_insert(se->reclist, 
                              global_parameters.server->service, 
                              record, (char *) mergekey_norm, 
                              &se->total_merged);
     if (global_parameters.dump_records)
-        yaz_log(YLOG_LOG, "Cluster id %d from %s (#%d)", cluster->recid,
+        yaz_log(YLOG_LOG, "Cluster id %s from %s (#%d)", cluster->recid,
                 client_get_database(cl)->database->url, record_no);
     if (!cluster)
     {
@@ -926,120 +1172,129 @@ struct record *ingest_record(struct client *cl, Z_External *rec,
         return 0;
     }
     relevance_newrec(se->relevance, cluster);
-
-
-    // now parsing XML record and adding data to cluster or record metadata
-    for (n = root->children; n; n = n->next)
-    {
-        if (type)
-            xmlFree(type);
-        if (value)
-            xmlFree(value);
-        type = value = 0;
-
-        if (n->type != XML_ELEMENT_NODE)
-            continue;
-        if (!strcmp((const char *) n->name, "metadata"))
-        {
-            struct conf_metadata *ser_md = 0;
-            struct conf_sortkey *ser_sk = 0;
-            struct record_metadata **wheretoput = 0;
-            struct record_metadata *rec_md = 0;
-            int md_field_id = -1;
-            int sk_field_id = -1;
-            int first, last;
-
-            type = xmlGetProp(n, (xmlChar *) "type");
-            value = xmlNodeListGetString(xdoc, n->children, 0);
-
-            if (!type || !value)
-                continue;
-
-            md_field_id 
-                = conf_service_metadata_field_id(service, (const char *) type);
-            if (md_field_id < 0)
-            {
-                yaz_log(YLOG_WARN, 
-                        "Ignoring unknown metadata element: %s", type);
-                continue;
-            }
-
-            ser_md = &service->metadata[md_field_id];
-
-            if (ser_md->sortkey_offset >= 0){
-                sk_field_id = ser_md->sortkey_offset;
-                ser_sk = &service->sortkeys[sk_field_id];
-            }
-
-            // Find out where we are putting it - based on merge or not
-            if (ser_md->merge == Metadata_merge_no)
-                wheretoput = &record->metadata[md_field_id];
-            else
-                wheretoput = &cluster->metadata[md_field_id];
-            
-            // create new record_metadata
-            rec_md = record_metadata_create(se->nmem);
-
-            // and polulate with data:
-            // type based charmapping decisions follow here
-            if (ser_md->type == Metadata_type_generic)
-            {
-
-                char * p = (char *) value;
-                p = normalize7bit_generic(p, " ,/.:([");
-                
-                rec_md->data.text = nmem_strdup(se->nmem, p);
-
-            }
-            else if (ser_md->type == Metadata_type_year)
-            {
-                if (extract7bit_years((char *) value, &first, &last) < 0)
-                    continue;
-            }
-            else
-            {
-                yaz_log(YLOG_WARN, 
-                        "Unknown type in metadata element %s", type);
-                continue;
-            }
-
-            // and polulate with data:
-            // assign cluster or record based on merge action
-            if (ser_md->merge == Metadata_merge_unique)
-            {
-                struct record_metadata *mnode;
-                for (mnode = *wheretoput; mnode; mnode = mnode->next)
-                    if (!strcmp((const char *) mnode->data.text, 
-                                rec_md->data.text))
-                        break;
-                if (!mnode)
-                {
-                    rec_md->next = *wheretoput;
-                    *wheretoput = rec_md;
-                }
-            }
-            else if (ser_md->merge == Metadata_merge_longest)
-            {
-                if (!*wheretoput 
-                    || strlen(rec_md->data.text) 
-                       > strlen((*wheretoput)->data.text))
-                {
-                    *wheretoput = rec_md;
-                    if (ser_sk)
-                    {
-                        char *s = nmem_strdup(se->nmem, rec_md->data.text);
-                        if (!cluster->sortkeys[sk_field_id])
-                            cluster->sortkeys[sk_field_id] = 
-                                nmem_malloc(se->nmem, 
-                                            sizeof(union data_types));
-                        normalize7bit_mergekey(s,
-                             (ser_sk->type == Metadata_sortkey_skiparticle));
-                        cluster->sortkeys[sk_field_id]->text = s;
+     
+     
+     // now parsing XML record and adding data to cluster or record metadata
+     for (n = root->children; n; n = n->next)
+     {
+         if (type)
+             xmlFree(type);
+         if (value)
+             xmlFree(value);
+         type = value = 0;
+
+         if (n->type != XML_ELEMENT_NODE)
+             continue;
+         if (!strcmp((const char *) n->name, "metadata"))
+         {
+             struct conf_metadata *ser_md = 0;
+             struct conf_sortkey *ser_sk = 0;
+             struct record_metadata **wheretoput = 0;
+             struct record_metadata *rec_md = 0;
+             int md_field_id = -1;
+             int sk_field_id = -1;
+
+             type = xmlGetProp(n, (xmlChar *) "type");
+             value = xmlNodeListGetString(xdoc, n->children, 1);
+
+             if (!type || !value || !*value)
+                 continue;
+
+             md_field_id 
+                 = conf_service_metadata_field_id(service, (const char *) type);
+             if (md_field_id < 0)
+             {
+                 yaz_log(YLOG_WARN, 
+                         "Ignoring unknown metadata element: %s", type);
+                 continue;
+             }
+
+             ser_md = &service->metadata[md_field_id];
+
+             if (ser_md->sortkey_offset >= 0){
+                 sk_field_id = ser_md->sortkey_offset;
+                 ser_sk = &service->sortkeys[sk_field_id];
+             }
+
+             // non-merged metadata
+             rec_md = record_metadata_init(se->nmem, (char *) value,
+                                           ser_md->type);
+             if (!rec_md)
+             {
+                 yaz_log(YLOG_WARN, "bad metadata data '%s' for element '%s'",
+                         value, type);
+                 continue;
+             }
+             rec_md->next = record->metadata[md_field_id];
+             record->metadata[md_field_id] = rec_md;
+
+             // merged metadata
+             rec_md = record_metadata_init(se->nmem, (char *) value,
+                                           ser_md->type);
+             wheretoput = &cluster->metadata[md_field_id];
+
+             // and polulate with data:
+             // assign cluster or record based on merge action
+             if (ser_md->merge == Metadata_merge_unique)
+             {
+                 struct record_metadata *mnode;
+                 for (mnode = *wheretoput; mnode; mnode = mnode->next)
+                     if (!strcmp((const char *) mnode->data.text.disp, 
+                                 rec_md->data.text.disp))
+                         break;
+                 if (!mnode)
+                 {
+                     rec_md->next = *wheretoput;
+                     *wheretoput = rec_md;
+                 }
+             }
+             else if (ser_md->merge == Metadata_merge_longest)
+             {
+                 if (!*wheretoput 
+                     || strlen(rec_md->data.text.disp) 
+                     > strlen((*wheretoput)->data.text.disp))
+                 {
+                     *wheretoput = rec_md;
+                     if (ser_sk)
+                     {
+                         const char *sort_str = 0;
+                         int skip_article = 
+                             ser_sk->type == Metadata_sortkey_skiparticle;
+
+                         if (!cluster->sortkeys[sk_field_id])
+                             cluster->sortkeys[sk_field_id] = 
+                                 nmem_malloc(se->nmem, 
+                                             sizeof(union data_types));
+                         
+                         prt = pp2_relevance_tokenize(
+                             global_parameters.server->sort_pct,
+                             rec_md->data.text.disp);
+
+                         pp2_relevance_token_next(prt);
+                         
+                         sort_str = pp2_get_sort(prt, skip_article);
+                         
+                         cluster->sortkeys[sk_field_id]->text.disp = 
+                             rec_md->data.text.disp;
+                         if (!sort_str)
+                         {
+                             sort_str = rec_md->data.text.disp;
+                             yaz_log(YLOG_WARN, 
+                                     "Could not make sortkey. Bug #1858");
+                         }
+                         cluster->sortkeys[sk_field_id]->text.sort = 
+                             nmem_strdup(se->nmem, sort_str);
+#if 0
+                         yaz_log(YLOG_LOG, "text disp=%s",
+                                 cluster->sortkeys[sk_field_id]->text.disp);
+                         yaz_log(YLOG_LOG, "text sort=%s",
+                                 cluster->sortkeys[sk_field_id]->text.sort);
+#endif
+                         pp2_relevance_token_destroy(prt);
                     }
                 }
             }
-            else if (ser_md->merge == Metadata_merge_all 
-                     || ser_md->merge == Metadata_merge_no)
+            else if (ser_md->merge == Metadata_merge_all)
             {
                 rec_md->next = *wheretoput;
                 *wheretoput = rec_md;
@@ -1049,28 +1304,19 @@ struct record *ingest_record(struct client *cl, Z_External *rec,
                 if (!*wheretoput)
                 {
                     *wheretoput = rec_md;
-                    (*wheretoput)->data.number.min = first;
-                    (*wheretoput)->data.number.max = last;
                     if (ser_sk)
                         cluster->sortkeys[sk_field_id] 
                             = &rec_md->data;
                 }
                 else
                 {
-                    if (first < (*wheretoput)->data.number.min)
-                        (*wheretoput)->data.number.min = first;
-                    if (last > (*wheretoput)->data.number.max)
-                        (*wheretoput)->data.number.max = last;
-                }
-#ifdef GAGA
-                if (ser_sk)
-                {
-                    union data_types *sdata 
-                        = cluster->sortkeys[sk_field_id];
-                    yaz_log(YLOG_LOG, "SK range: %d-%d",
-                            sdata->number.min, sdata->number.max);
+                    int this_min = rec_md->data.number.min;
+                    int this_max = rec_md->data.number.max;
+                    if (this_min < (*wheretoput)->data.number.min)
+                        (*wheretoput)->data.number.min = this_min;
+                    if (this_max > (*wheretoput)->data.number.max)
+                        (*wheretoput)->data.number.max = this_max;
                 }
-#endif
             }
 
 
@@ -1085,11 +1331,11 @@ struct record *ingest_record(struct client *cl, Z_External *rec,
                 if (ser_md->type == Metadata_type_year)
                 {
                     char year[64];
-                    sprintf(year, "%d", last);
+                    sprintf(year, "%d", rec_md->data.number.max);
                     add_facet(se, (char *) type, year);
-                    if (first != last)
+                    if (rec_md->data.number.max != rec_md->data.number.min)
                     {
-                        sprintf(year, "%d", first);
+                        sprintf(year, "%d", rec_md->data.number.min);
                         add_facet(se, (char *) type, year);
                     }
                 }