-/* $Id: database.c,v 1.2 2007-03-16 09:34:55 adam Exp $ */
+/* This file is part of Pazpar2.
+ Copyright (C) 2006-2010 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
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+Pazpar2 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.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+*/
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
#include <libxml/parser.h>
#include <libxml/tree.h>
-#include <libxslt/xslt.h>
-#include <libxslt/transform.h>
-#include <libxslt/xsltutils.h>
#include <assert.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <yaz/log.h>
+#include <yaz/nmem.h>
-#include "pazpar2.h"
-#include "config.h"
+#include "ppmutex.h"
+#include "session.h"
+#include "host.h"
+#include "pazpar2_config.h"
+#include "settings.h"
#include "http.h"
#include "zeerex.h"
+#include "database.h"
#include <sys/types.h>
+#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
+#endif
+#if HAVE_NETDB_H
#include <netdb.h>
+#endif
+#if HAVE_NETINET_IN_H
#include <netinet/in.h>
+#endif
-static struct host *hosts = 0; // The hosts we know about
-static struct database *databases = 0; // The databases we know about
-static NMEM nmem = 0;
+enum pazpar2_database_criterion_type {
+ PAZPAR2_STRING_MATCH,
+ PAZPAR2_SUBSTRING_MATCH
+};
-// This needs to be extended with selection criteria
-static struct conf_retrievalprofile *database_retrievalprofile(const char *id)
-{
- if (!config)
- {
- yaz_log(YLOG_FATAL, "Must load configuration (-f)");
- exit(1);
- }
- if (!config->retrievalprofiles)
- {
- yaz_log(YLOG_FATAL, "No retrieval profiles defined");
- }
- return config->retrievalprofiles;
-}
+struct database_criterion_value {
+ char *value;
+ struct database_criterion_value *next;
+};
+
+struct database_criterion {
+ char *name;
+ enum pazpar2_database_criterion_type type;
+ struct database_criterion_value *values;
+ struct database_criterion *next;
+};
-static struct conf_queryprofile *database_queryprofile(const char *id)
-{
- return (struct conf_queryprofile*) 1;
-}
-static xmlDoc *get_explain_xml(const char *id)
+struct database_hosts {
+ struct host *hosts;
+ YAZ_MUTEX mutex;
+};
+
+static xmlDoc *get_explain_xml(struct conf_targetprofiles *targetprofiles,
+ const char *id)
{
+ struct stat st;
char *dir;
char path[256];
char ide[256];
- if (!config || !config->targetprofiles)
- {
- yaz_log(YLOG_WARN, "Config must be loaded and specify targetprofiles");
- return 0;
- }
- if (config->targetprofiles->type != Targetprofiles_local)
+ if (targetprofiles->type != Targetprofiles_local)
{
yaz_log(YLOG_FATAL, "Only supports local type");
return 0;
}
- dir = config->targetprofiles->src;
+ dir = targetprofiles->src;
urlencode(id, ide);
sprintf(path, "%s/%s", dir, ide);
- yaz_log(YLOG_LOG, "Path: %s", path);
- return xmlParseFile(path);
+ if (!stat(path, &st))
+ return xmlParseFile(path);
+ else
+ return 0;
}
// Create a new host structure for hostport
-static struct host *create_host(const char *hostport)
+static struct host *create_host(const char *hostport, iochan_man_t iochan_man)
{
- struct addrinfo *addrinfo, hints;
struct host *host;
- char *port;
- char ipport[128];
- unsigned char addrbuf[4];
- int res;
host = xmalloc(sizeof(struct host));
host->hostport = xstrdup(hostport);
host->connections = 0;
+ host->ipport = 0;
+ host->mutex = 0;
- if ((port = strchr(hostport, ':')))
- *(port++) = '\0';
- else
- port = "210";
-
- hints.ai_flags = 0;
- hints.ai_family = PF_INET;
- hints.ai_socktype = SOCK_STREAM;
- hints.ai_protocol = IPPROTO_TCP;
- hints.ai_addrlen = 0;
- hints.ai_addr = 0;
- hints.ai_canonname = 0;
- hints.ai_next = 0;
- // This is not robust code. It assumes that getaddrinfo always
- // returns AF_INET address.
- if ((res = getaddrinfo(hostport, port, &hints, &addrinfo)))
+ if (host_getaddrinfo(host, iochan_man))
{
- yaz_log(YLOG_WARN, "Failed to resolve %s: %s", hostport, gai_strerror(res));
xfree(host->hostport);
xfree(host);
return 0;
}
- assert(addrinfo->ai_family == PF_INET);
- memcpy(addrbuf, &((struct sockaddr_in*)addrinfo->ai_addr)->sin_addr.s_addr, 4);
- sprintf(ipport, "%u.%u.%u.%u:%s",
- addrbuf[0], addrbuf[1], addrbuf[2], addrbuf[3], port);
- host->ipport = xstrdup(ipport);
- freeaddrinfo(addrinfo);
- host->next = hosts;
- hosts = host;
+ pazpar2_mutex_create(&host->mutex, "host");
+
+ yaz_cond_create(&host->cond_ready);
+
return host;
}
-static struct host *find_host(const char *hostport)
+static struct host *find_host(database_hosts_t hosts,
+ const char *hostport, iochan_man_t iochan_man)
{
struct host *p;
- for (p = hosts; p; p = p->next)
+ yaz_mutex_enter(hosts->mutex);
+ for (p = hosts->hosts; p; p = p->next)
if (!strcmp(p->hostport, hostport))
- return p;
- return create_host(hostport);
+ break;
+ if (!p)
+ {
+ p = create_host(hostport, iochan_man);
+ if (p)
+ {
+ p->next = hosts->hosts;
+ hosts->hosts = p;
+ }
+ }
+ yaz_mutex_leave(hosts->mutex);
+ return p;
}
-static struct database *load_database(const char *id)
+int resolve_database(struct conf_service *service, struct database *db)
+{
+ if (db->host == 0)
+ {
+ struct host *host;
+ char *p;
+ char hostport[256];
+ strcpy(hostport, db->url);
+ if ((p = strchr(hostport, '/')))
+ *p = '\0';
+ if (!(host = find_host(service->server->database_hosts,
+ hostport, service->server->iochan_man)))
+ return -1;
+ db->host = host;
+ }
+ return 0;
+}
+
+void resolve_databases(struct conf_service *service)
+{
+ struct database *db = service->databases;
+ for (; db; db = db->next)
+ resolve_database(service, db);
+}
+
+struct database *new_database(const char *id, NMEM nmem)
{
- xmlDoc *doc = get_explain_xml(id);
- struct zr_explain *explain;
- struct conf_retrievalprofile *retrieval;
- struct conf_queryprofile *query;
struct database *db;
- struct host *host;
char hostport[256];
char *dbname;
+ struct setting *idset;
- if (!nmem)
- nmem = nmem_create();
- if (doc)
- {
- explain = zr_read_xml(nmem, xmlDocGetRootElement(doc));
- if (!explain)
- return 0;
- }
- if (!(retrieval = database_retrievalprofile(id)) ||
- !(query = database_queryprofile(id)))
- {
- xmlFree(doc);
- return 0;
- }
if (strlen(id) > 255)
return 0;
strcpy(hostport, id);
if ((dbname = strchr(hostport, '/')))
*(dbname++) = '\0';
else
- dbname = "Default";
- if (!(host = find_host(hostport)))
- return 0;
+ dbname = "";
db = nmem_malloc(nmem, sizeof(*db));
memset(db, 0, sizeof(*db));
- db->host = host;
+ db->host = 0;
db->url = nmem_strdup(nmem, id);
- db->name = dbname;
- db->databases = xmalloc(2 * sizeof(char *));
+ db->databases = nmem_malloc(nmem, 2 * sizeof(char *));
db->databases[0] = nmem_strdup(nmem, dbname);
db->databases[1] = 0;
db->errors = 0;
+ db->explain = 0;
+
+ db->num_settings = PZ_MAX_EOF;
+ db->settings = nmem_malloc(nmem, sizeof(struct settings*) *
+ db->num_settings);
+ memset(db->settings, 0, sizeof(struct settings*) * db->num_settings);
+ idset = nmem_malloc(nmem, sizeof(*idset));
+ idset->precedence = 0;
+ idset->name = "pz:id";
+ idset->target = idset->value = db->url;
+ idset->next = 0;
+ db->settings[PZ_ID] = idset;
+ db->next = 0;
+
+ return db;
+}
+
+static struct database *load_database(const char *id,
+ struct conf_service *service)
+{
+ struct database *db;
+ struct zr_explain *explain = 0;
+ xmlDoc *doc = 0;
+
+ if (service->targetprofiles
+ && (doc = get_explain_xml(service->targetprofiles, id)))
+ {
+ explain = zr_read_xml(service->nmem, xmlDocGetRootElement(doc));
+ if (!explain)
+ return 0;
+ }
+ db = new_database(id, service->nmem);
db->explain = explain;
- db->qprofile = query;
- db->rprofile = retrieval;
- db->next = databases;
- databases = db;
+ db->next = service->databases;
+ service->databases = db;
return db;
}
// Return a database structure by ID. Load and add to list if necessary
// new==1 just means we know it's not in the list
-struct database *find_database(const char *id, int new)
+struct database *find_database(const char *id, struct conf_service *service)
{
struct database *p;
- if (!new)
+ for (p = service->databases; p; p = p->next)
+ if (!strcmp(p->url, id))
+ return p;
+ return load_database(id, service);
+}
+
+// This whole session_grep database thing should be moved elsewhere
+
+int match_zurl(const char *zurl, const char *pattern)
+{
+ int len;
+
+ if (!strcmp(pattern, "*"))
+ return 1;
+ else if (!strncmp(pattern, "*/", 2)) // host wildcard.. what the heck is that for?
+ {
+ char *db = strchr(zurl, '/');
+ if (!db)
+ return 0;
+ if (!strcmp(pattern + 2, db))
+ return 1;
+ else
+ return 0;
+ }
+ else if (*(pattern + (len = strlen(pattern) - 1)) == '*') // db wildcard
{
- for (p = databases; p; p = p->next)
- if (!strcmp(p->url, id))
- return p;
+ if (!strncmp(pattern, zurl, len))
+ return 1;
+ else
+ return 2;
}
- return load_database(id);
+ else if (!strcmp(pattern, zurl))
+ return 1;
+ else
+ return 0;
}
-// Needs to be extended with criteria
-// Cycles through databases, calling a handler function on each.
-int grep_databases(void *context, void (*fun)(void *context, struct database *db))
+// This will be generalized at some point
+static int match_criterion(struct setting **settings,
+ struct conf_service *service,
+ struct database_criterion *c)
{
- struct database *p;
- int i;
+ int offset = settings_lookup_offset(service, c->name);
+ struct database_criterion_value *v;
- for (p = databases; p; p = p->next)
+ if (offset < 0)
{
- (*fun)(context, p);
- i++;
+ yaz_log(YLOG_WARN, "Criterion not found: %s", c->name);
+ return 0;
}
- return i;
+ if (!settings[offset])
+ return 0;
+ for (v = c->values; v; v = v->next)
+ {
+ if (c->type == PAZPAR2_STRING_MATCH)
+ {
+ if (offset == PZ_ID)
+ {
+ if (match_zurl(settings[offset]->value, v->value))
+ break;
+ }
+ else
+ {
+ if (!strcmp(settings[offset]->value, v->value))
+ break;
+ }
+ }
+ else if (c->type == PAZPAR2_SUBSTRING_MATCH)
+ {
+ if (strstr(settings[offset]->value, v->value))
+ break;
+ }
+ }
+ if (v)
+ return 1;
+ else
+ return 0;
}
-// This function will most likely vanish when a proper target profile mechanism is
-// introduced.
-void load_simpletargets(const char *fn)
+// parses crit1=val1,crit2=val2|val3,...
+static struct database_criterion *create_database_criterion(NMEM m,
+ const char *buf)
{
- FILE *f = fopen(fn, "r");
- char line[256];
+ struct database_criterion *res = 0;
+ char **values;
+ int num;
+ int i;
- if (!f)
+ if (!buf || !*buf)
+ return 0;
+ nmem_strsplit(m, ",", buf, &values, &num);
+ for (i = 0; i < num; i++)
{
- yaz_log(YLOG_WARN|YLOG_ERRNO, "open %s", fn);
- exit(1);
+ char **subvalues;
+ int subnum;
+ int subi;
+ struct database_criterion *new = nmem_malloc(m, sizeof(*new));
+ char *eq;
+ if ((eq = strchr(values[i], '=')))
+ new->type = PAZPAR2_STRING_MATCH;
+ else if ((eq = strchr(values[i], '~')))
+ new->type = PAZPAR2_SUBSTRING_MATCH;
+ else
+ {
+ yaz_log(YLOG_WARN, "Missing equal-sign/tilde in filter");
+ return 0;
+ }
+ *(eq++) = '\0';
+ new->name = values[i];
+ nmem_strsplit(m, "|", eq, &subvalues, &subnum);
+ new->values = 0;
+ for (subi = 0; subi < subnum; subi++)
+ {
+ struct database_criterion_value *newv
+ = nmem_malloc(m, sizeof(*newv));
+ newv->value = subvalues[subi];
+ newv->next = new->values;
+ new->values = newv;
+ }
+ new->next = res;
+ res = new;
}
+ return res;
+}
- while (fgets(line, 255, f))
- {
- char *url;
- char *name;
+static int database_match_criteria(struct setting **settings,
+ struct conf_service *service,
+ struct database_criterion *cl)
+{
+ for (; cl; cl = cl->next)
+ if (!match_criterion(settings, service, cl))
+ break;
+ if (cl) // one of the criteria failed to match -- skip this db
+ return 0;
+ else
+ return 1;
+}
+
+// Cycles through databases, calling a handler function on the ones for
+// which all criteria matched.
+int session_grep_databases(struct session *se, const char *filter,
+ void (*fun)(void *context, struct session_database *db))
+{
+ struct session_database *p;
+ NMEM nmem = nmem_create();
+ int i = 0;
+ struct database_criterion *cl = create_database_criterion(nmem, filter);
- if (strncmp(line, "target ", 7))
+ for (p = se->databases; p; p = p->next)
+ {
+ if (p->settings && p->settings[PZ_ALLOW] && *p->settings[PZ_ALLOW]->value == '0')
+ continue;
+ if (!p->settings[PZ_NAME])
continue;
- line[strlen(line) - 1] = '\0';
+ if (database_match_criteria(p->settings, se->service, cl))
+ {
+ (*fun)(se, p);
+ i++;
+ }
+ }
+ nmem_destroy(nmem);
+ return i;
+}
- if ((name = strchr(line, ';')))
- *(name++) = '\0';
+int predef_grep_databases(void *context, struct conf_service *service,
+ void (*fun)(void *context, struct database *db))
+{
+ struct database *p;
+ int i = 0;
- url = line + 7;
+ for (p = service->databases; p; p = p->next)
+ if (database_match_criteria(p->settings, service, 0))
+ {
+ (*fun)(context, p);
+ i++;
+ }
+ return i;
+}
- if (!find_database(url, 0))
- yaz_log(YLOG_WARN, "Unable to load database %s", url);
- }
- fclose(f);
+database_hosts_t database_hosts_create(void)
+{
+ database_hosts_t p = xmalloc(sizeof(*p));
+ p->hosts = 0;
+ p->mutex = 0;
+ pazpar2_mutex_create(&p->mutex, "database");
+ return p;
}
+void database_hosts_destroy(database_hosts_t *pp)
+{
+ if (*pp)
+ {
+ struct host *p = (*pp)->hosts;
+ while (p)
+ {
+ struct host *p_next = p->next;
+ yaz_mutex_destroy(&p->mutex);
+ yaz_cond_destroy(&p->cond_ready);
+ xfree(p->ipport);
+ xfree(p->hostport);
+ xfree(p);
+ p = p_next;
+ }
+ yaz_mutex_destroy(&(*pp)->mutex);
+ xfree(*pp);
+ }
+}
/*
* Local variables:
* c-basic-offset: 4
+ * c-file-style: "Stroustrup"
* indent-tabs-mode: nil
* End:
* vim: shiftwidth=4 tabstop=8 expandtab
*/
+
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