1 /* This file is part of Pazpar2.
2 Copyright (C) 2006-2011 Index Data
4 Pazpar2 is free software; you can redistribute it and/or modify it under
5 the terms of the GNU General Public License as published by the Free
6 Software Foundation; either version 2, or (at your option) any later
9 Pazpar2 is distributed in the hope that it will be useful, but WITHOUT ANY
10 WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 #include <libxml/parser.h>
25 #include <libxml/tree.h>
27 #include <sys/types.h>
35 #include "pazpar2_config.h"
40 #include <sys/types.h>
42 #include <sys/socket.h>
48 #include <netinet/in.h>
51 enum pazpar2_database_criterion_type {
53 PAZPAR2_SUBSTRING_MATCH
56 struct database_criterion_value {
58 struct database_criterion_value *next;
61 struct database_criterion {
63 enum pazpar2_database_criterion_type type;
64 struct database_criterion_value *values;
65 struct database_criterion *next;
68 struct database_hosts {
73 // Create a new host structure for hostport
74 static struct host *create_host(const char *hostport)
79 host = xmalloc(sizeof(struct host));
80 host->hostport = xstrdup(hostport);
81 db_comment = strchr(host->hostport, '#');
84 host->connections = 0;
87 pazpar2_mutex_create(&host->mutex, "host");
89 yaz_cond_create(&host->cond_ready);
94 static struct host *find_host(database_hosts_t hosts,
98 yaz_mutex_enter(hosts->mutex);
99 for (p = hosts->hosts; p; p = p->next)
100 if (!strcmp(p->hostport, hostport))
104 p = create_host(hostport);
107 p->next = hosts->hosts;
111 yaz_mutex_leave(hosts->mutex);
115 int resolve_database(struct conf_service *service, struct database *db)
120 if (!(host = find_host(service->server->database_hosts, db->url)))
127 struct database *new_database(const char *id, NMEM nmem)
130 struct setting *idset;
132 db = nmem_malloc(nmem, sizeof(*db));
133 memset(db, 0, sizeof(*db));
135 db->url = nmem_strdup(nmem, id);
139 db->num_settings = PZ_MAX_EOF;
140 db->settings = nmem_malloc(nmem, sizeof(struct settings*) *
142 memset(db->settings, 0, sizeof(struct settings*) * db->num_settings);
143 idset = nmem_malloc(nmem, sizeof(*idset));
144 idset->precedence = 0;
145 idset->name = "pz:id";
146 idset->target = idset->value = db->url;
148 db->settings[PZ_ID] = idset;
154 static struct database *load_database(const char *id,
155 struct conf_service *service)
159 db = new_database(id, service->nmem);
161 db->next = service->databases;
162 service->databases = db;
167 // Return a database structure by ID. Load and add to list if necessary
168 // new==1 just means we know it's not in the list
169 struct database *find_database(const char *id, struct conf_service *service)
172 for (p = service->databases; p; p = p->next)
173 if (!strcmp(p->url, id))
175 return load_database(id, service);
178 // This whole session_grep database thing should be moved elsewhere
180 int match_zurl(const char *zurl, const char *pattern)
184 if (!strcmp(pattern, "*"))
186 else if (!strncmp(pattern, "*/", 2)) // host wildcard.. what the heck is that for?
188 char *db = strchr(zurl, '/');
191 if (!strcmp(pattern + 2, db))
196 else if (*(pattern + (len = strlen(pattern) - 1)) == '*') // db wildcard
198 if (!strncmp(pattern, zurl, len))
203 else if (!strcmp(pattern, zurl))
209 // This will be generalized at some point
210 static int match_criterion(struct setting **settings,
211 struct conf_service *service,
212 struct database_criterion *c)
214 int offset = settings_lookup_offset(service, c->name);
215 struct database_criterion_value *v;
219 yaz_log(YLOG_WARN, "Criterion not found: %s", c->name);
222 if (!settings[offset])
224 for (v = c->values; v; v = v->next)
226 if (c->type == PAZPAR2_STRING_MATCH)
230 if (match_zurl(settings[offset]->value, v->value))
235 if (!strcmp(settings[offset]->value, v->value))
239 else if (c->type == PAZPAR2_SUBSTRING_MATCH)
241 if (strstr(settings[offset]->value, v->value))
251 // parses crit1=val1,crit2=val2|val3,...
252 static struct database_criterion *create_database_criterion(NMEM m,
255 struct database_criterion *res = 0;
262 nmem_strsplit(m, ",", buf, &values, &num);
263 for (i = 0; i < num; i++)
268 struct database_criterion *new = nmem_malloc(m, sizeof(*new));
270 if ((eq = strchr(values[i], '=')))
271 new->type = PAZPAR2_STRING_MATCH;
272 else if ((eq = strchr(values[i], '~')))
273 new->type = PAZPAR2_SUBSTRING_MATCH;
276 yaz_log(YLOG_WARN, "Missing equal-sign/tilde in filter");
280 new->name = values[i];
281 nmem_strsplit(m, "|", eq, &subvalues, &subnum);
283 for (subi = 0; subi < subnum; subi++)
285 struct database_criterion_value *newv
286 = nmem_malloc(m, sizeof(*newv));
287 newv->value = subvalues[subi];
288 newv->next = new->values;
297 static int database_match_criteria(struct setting **settings,
298 struct conf_service *service,
299 struct database_criterion *cl)
301 for (; cl; cl = cl->next)
302 if (!match_criterion(settings, service, cl))
304 if (cl) // one of the criteria failed to match -- skip this db
310 // Cycles through databases, calling a handler function on the ones for
311 // which all criteria matched.
312 int session_grep_databases(struct session *se, const char *filter,
313 void (*fun)(struct session *se, struct session_database *db))
315 struct session_database *p;
316 NMEM nmem = nmem_create();
318 struct database_criterion *cl = create_database_criterion(nmem, filter);
320 for (p = se->databases; p; p = p->next)
322 if (p->settings && p->settings[PZ_ALLOW] && *p->settings[PZ_ALLOW]->value == '0')
324 if (!p->settings[PZ_NAME])
326 if (database_match_criteria(p->settings, se->service, cl))
336 int predef_grep_databases(void *context, struct conf_service *service,
337 void (*fun)(void *context, struct database *db))
342 for (p = service->databases; p; p = p->next)
343 if (database_match_criteria(p->settings, service, 0))
351 database_hosts_t database_hosts_create(void)
353 database_hosts_t p = xmalloc(sizeof(*p));
356 pazpar2_mutex_create(&p->mutex, "database");
360 void database_hosts_destroy(database_hosts_t *pp)
364 struct host *p = (*pp)->hosts;
367 struct host *p_next = p->next;
368 yaz_mutex_destroy(&p->mutex);
369 yaz_cond_destroy(&p->cond_ready);
374 yaz_mutex_destroy(&(*pp)->mutex);
382 * c-file-style: "Stroustrup"
383 * indent-tabs-mode: nil
385 * vim: shiftwidth=4 tabstop=8 expandtab