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;
69 struct database_hosts {
74 // Create a new host structure for hostport
75 static struct host *create_host(const char *hostport, iochan_man_t iochan_man)
79 host = xmalloc(sizeof(struct host));
80 host->hostport = xstrdup(hostport);
81 host->connections = 0;
85 if (host_getaddrinfo(host, iochan_man))
87 xfree(host->hostport);
91 pazpar2_mutex_create(&host->mutex, "host");
93 yaz_cond_create(&host->cond_ready);
98 static struct host *find_host(database_hosts_t hosts,
99 const char *hostport, iochan_man_t iochan_man)
102 yaz_mutex_enter(hosts->mutex);
103 for (p = hosts->hosts; p; p = p->next)
104 if (!strcmp(p->hostport, hostport))
108 p = create_host(hostport, iochan_man);
111 p->next = hosts->hosts;
115 yaz_mutex_leave(hosts->mutex);
119 int resolve_database(struct conf_service *service, struct database *db)
126 strcpy(hostport, db->url);
127 if ((p = strchr(hostport, '/')))
129 if (!(host = find_host(service->server->database_hosts,
130 hostport, service->server->iochan_man)))
137 void resolve_databases(struct conf_service *service)
139 struct database *db = service->databases;
140 for (; db; db = db->next)
141 resolve_database(service, db);
144 struct database *new_database(const char *id, NMEM nmem)
150 struct setting *idset;
152 if (strlen(id) > 255)
154 strcpy(hostport, id);
155 if ((dbname = strchr(hostport, '/')))
159 db_comment = strchr(dbname, '#');
162 db = nmem_malloc(nmem, sizeof(*db));
163 memset(db, 0, sizeof(*db));
165 db->url = nmem_strdup(nmem, id);
166 db->databases = nmem_malloc(nmem, 2 * sizeof(char *));
167 db->databases[0] = nmem_strdup(nmem, dbname);
168 db->databases[1] = 0;
172 db->num_settings = PZ_MAX_EOF;
173 db->settings = nmem_malloc(nmem, sizeof(struct settings*) *
175 memset(db->settings, 0, sizeof(struct settings*) * db->num_settings);
176 idset = nmem_malloc(nmem, sizeof(*idset));
177 idset->precedence = 0;
178 idset->name = "pz:id";
179 idset->target = idset->value = db->url;
181 db->settings[PZ_ID] = idset;
187 static struct database *load_database(const char *id,
188 struct conf_service *service)
191 struct zr_explain *explain = 0;
193 db = new_database(id, service->nmem);
194 db->explain = explain;
195 db->next = service->databases;
196 service->databases = db;
201 // Return a database structure by ID. Load and add to list if necessary
202 // new==1 just means we know it's not in the list
203 struct database *find_database(const char *id, struct conf_service *service)
206 for (p = service->databases; p; p = p->next)
207 if (!strcmp(p->url, id))
209 return load_database(id, service);
212 // This whole session_grep database thing should be moved elsewhere
214 int match_zurl(const char *zurl, const char *pattern)
218 if (!strcmp(pattern, "*"))
220 else if (!strncmp(pattern, "*/", 2)) // host wildcard.. what the heck is that for?
222 char *db = strchr(zurl, '/');
225 if (!strcmp(pattern + 2, db))
230 else if (*(pattern + (len = strlen(pattern) - 1)) == '*') // db wildcard
232 if (!strncmp(pattern, zurl, len))
237 else if (!strcmp(pattern, zurl))
243 // This will be generalized at some point
244 static int match_criterion(struct setting **settings,
245 struct conf_service *service,
246 struct database_criterion *c)
248 int offset = settings_lookup_offset(service, c->name);
249 struct database_criterion_value *v;
253 yaz_log(YLOG_WARN, "Criterion not found: %s", c->name);
256 if (!settings[offset])
258 for (v = c->values; v; v = v->next)
260 if (c->type == PAZPAR2_STRING_MATCH)
264 if (match_zurl(settings[offset]->value, v->value))
269 if (!strcmp(settings[offset]->value, v->value))
273 else if (c->type == PAZPAR2_SUBSTRING_MATCH)
275 if (strstr(settings[offset]->value, v->value))
285 // parses crit1=val1,crit2=val2|val3,...
286 static struct database_criterion *create_database_criterion(NMEM m,
289 struct database_criterion *res = 0;
296 nmem_strsplit(m, ",", buf, &values, &num);
297 for (i = 0; i < num; i++)
302 struct database_criterion *new = nmem_malloc(m, sizeof(*new));
304 if ((eq = strchr(values[i], '=')))
305 new->type = PAZPAR2_STRING_MATCH;
306 else if ((eq = strchr(values[i], '~')))
307 new->type = PAZPAR2_SUBSTRING_MATCH;
310 yaz_log(YLOG_WARN, "Missing equal-sign/tilde in filter");
314 new->name = values[i];
315 nmem_strsplit(m, "|", eq, &subvalues, &subnum);
317 for (subi = 0; subi < subnum; subi++)
319 struct database_criterion_value *newv
320 = nmem_malloc(m, sizeof(*newv));
321 newv->value = subvalues[subi];
322 newv->next = new->values;
331 static int database_match_criteria(struct setting **settings,
332 struct conf_service *service,
333 struct database_criterion *cl)
335 for (; cl; cl = cl->next)
336 if (!match_criterion(settings, service, cl))
338 if (cl) // one of the criteria failed to match -- skip this db
344 // Cycles through databases, calling a handler function on the ones for
345 // which all criteria matched.
346 int session_grep_databases(struct session *se, const char *filter,
347 void (*fun)(void *context, struct session_database *db))
349 struct session_database *p;
350 NMEM nmem = nmem_create();
352 struct database_criterion *cl = create_database_criterion(nmem, filter);
354 for (p = se->databases; p; p = p->next)
356 if (p->settings && p->settings[PZ_ALLOW] && *p->settings[PZ_ALLOW]->value == '0')
358 if (!p->settings[PZ_NAME])
360 if (database_match_criteria(p->settings, se->service, cl))
370 int predef_grep_databases(void *context, struct conf_service *service,
371 void (*fun)(void *context, struct database *db))
376 for (p = service->databases; p; p = p->next)
377 if (database_match_criteria(p->settings, service, 0))
385 database_hosts_t database_hosts_create(void)
387 database_hosts_t p = xmalloc(sizeof(*p));
390 pazpar2_mutex_create(&p->mutex, "database");
394 void database_hosts_destroy(database_hosts_t *pp)
398 struct host *p = (*pp)->hosts;
401 struct host *p_next = p->next;
402 yaz_mutex_destroy(&p->mutex);
403 yaz_cond_destroy(&p->cond_ready);
409 yaz_mutex_destroy(&(*pp)->mutex);
417 * c-file-style: "Stroustrup"
418 * indent-tabs-mode: nil
420 * vim: shiftwidth=4 tabstop=8 expandtab