1 /* This file is part of Pazpar2.
2 Copyright (C) 2006-2010 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"
41 #include <sys/types.h>
43 #include <sys/socket.h>
49 #include <netinet/in.h>
52 enum pazpar2_database_criterion_type {
54 PAZPAR2_SUBSTRING_MATCH
57 struct database_criterion_value {
59 struct database_criterion_value *next;
62 struct database_criterion {
64 enum pazpar2_database_criterion_type type;
65 struct database_criterion_value *values;
66 struct database_criterion *next;
70 struct database_hosts {
75 static xmlDoc *get_explain_xml(struct conf_targetprofiles *targetprofiles,
82 if (targetprofiles->type != Targetprofiles_local)
84 yaz_log(YLOG_FATAL, "Only supports local type");
87 dir = targetprofiles->src;
89 sprintf(path, "%s/%s", dir, ide);
91 return xmlParseFile(path);
96 // Create a new host structure for hostport
97 static struct host *create_host(const char *hostport, iochan_man_t iochan_man)
101 host = xmalloc(sizeof(struct host));
102 host->hostport = xstrdup(hostport);
103 host->connections = 0;
107 if (host_getaddrinfo(host, iochan_man))
109 xfree(host->hostport);
113 pazpar2_mutex_create(&host->mutex, "host");
115 yaz_cond_create(&host->cond_ready);
120 static struct host *find_host(database_hosts_t hosts,
121 const char *hostport, iochan_man_t iochan_man)
124 yaz_mutex_enter(hosts->mutex);
125 for (p = hosts->hosts; p; p = p->next)
126 if (!strcmp(p->hostport, hostport))
130 p = create_host(hostport, iochan_man);
133 p->next = hosts->hosts;
137 yaz_mutex_leave(hosts->mutex);
141 int resolve_database(struct conf_service *service, struct database *db)
148 strcpy(hostport, db->url);
149 if ((p = strchr(hostport, '/')))
151 if (!(host = find_host(service->server->database_hosts,
152 hostport, service->server->iochan_man)))
159 void resolve_databases(struct conf_service *service)
161 struct database *db = service->databases;
162 for (; db; db = db->next)
163 resolve_database(service, db);
166 struct database *new_database(const char *id, NMEM nmem)
171 struct setting *idset;
173 if (strlen(id) > 255)
175 strcpy(hostport, id);
176 if ((dbname = strchr(hostport, '/')))
180 db = nmem_malloc(nmem, sizeof(*db));
181 memset(db, 0, sizeof(*db));
183 db->url = nmem_strdup(nmem, id);
184 db->databases = nmem_malloc(nmem, 2 * sizeof(char *));
185 db->databases[0] = nmem_strdup(nmem, dbname);
186 db->databases[1] = 0;
190 db->num_settings = PZ_MAX_EOF;
191 db->settings = nmem_malloc(nmem, sizeof(struct settings*) *
193 memset(db->settings, 0, sizeof(struct settings*) * db->num_settings);
194 idset = nmem_malloc(nmem, sizeof(*idset));
195 idset->precedence = 0;
196 idset->name = "pz:id";
197 idset->target = idset->value = db->url;
199 db->settings[PZ_ID] = idset;
205 static struct database *load_database(const char *id,
206 struct conf_service *service)
209 struct zr_explain *explain = 0;
212 if (service->targetprofiles
213 && (doc = get_explain_xml(service->targetprofiles, id)))
215 explain = zr_read_xml(service->nmem, xmlDocGetRootElement(doc));
219 db = new_database(id, service->nmem);
220 db->explain = explain;
221 db->next = service->databases;
222 service->databases = db;
227 // Return a database structure by ID. Load and add to list if necessary
228 // new==1 just means we know it's not in the list
229 struct database *find_database(const char *id, struct conf_service *service)
232 for (p = service->databases; p; p = p->next)
233 if (!strcmp(p->url, id))
235 return load_database(id, service);
238 // This whole session_grep database thing should be moved elsewhere
240 int match_zurl(const char *zurl, const char *pattern)
244 if (!strcmp(pattern, "*"))
246 else if (!strncmp(pattern, "*/", 2)) // host wildcard.. what the heck is that for?
248 char *db = strchr(zurl, '/');
251 if (!strcmp(pattern + 2, db))
256 else if (*(pattern + (len = strlen(pattern) - 1)) == '*') // db wildcard
258 if (!strncmp(pattern, zurl, len))
263 else if (!strcmp(pattern, zurl))
269 // This will be generalized at some point
270 static int match_criterion(struct setting **settings,
271 struct conf_service *service,
272 struct database_criterion *c)
274 int offset = settings_lookup_offset(service, c->name);
275 struct database_criterion_value *v;
279 yaz_log(YLOG_WARN, "Criterion not found: %s", c->name);
282 if (!settings[offset])
284 for (v = c->values; v; v = v->next)
286 if (c->type == PAZPAR2_STRING_MATCH)
290 if (match_zurl(settings[offset]->value, v->value))
295 if (!strcmp(settings[offset]->value, v->value))
299 else if (c->type == PAZPAR2_SUBSTRING_MATCH)
301 if (strstr(settings[offset]->value, v->value))
311 // parses crit1=val1,crit2=val2|val3,...
312 static struct database_criterion *create_database_criterion(NMEM m,
315 struct database_criterion *res = 0;
322 nmem_strsplit(m, ",", buf, &values, &num);
323 for (i = 0; i < num; i++)
328 struct database_criterion *new = nmem_malloc(m, sizeof(*new));
330 if ((eq = strchr(values[i], '=')))
331 new->type = PAZPAR2_STRING_MATCH;
332 else if ((eq = strchr(values[i], '~')))
333 new->type = PAZPAR2_SUBSTRING_MATCH;
336 yaz_log(YLOG_WARN, "Missing equal-sign/tilde in filter");
340 new->name = values[i];
341 nmem_strsplit(m, "|", eq, &subvalues, &subnum);
343 for (subi = 0; subi < subnum; subi++)
345 struct database_criterion_value *newv
346 = nmem_malloc(m, sizeof(*newv));
347 newv->value = subvalues[subi];
348 newv->next = new->values;
357 static int database_match_criteria(struct setting **settings,
358 struct conf_service *service,
359 struct database_criterion *cl)
361 for (; cl; cl = cl->next)
362 if (!match_criterion(settings, service, cl))
364 if (cl) // one of the criteria failed to match -- skip this db
370 // Cycles through databases, calling a handler function on the ones for
371 // which all criteria matched.
372 int session_grep_databases(struct session *se, const char *filter,
373 void (*fun)(void *context, struct session_database *db))
375 struct session_database *p;
376 NMEM nmem = nmem_create();
378 struct database_criterion *cl = create_database_criterion(nmem, filter);
380 for (p = se->databases; p; p = p->next)
382 if (p->settings && p->settings[PZ_ALLOW] && *p->settings[PZ_ALLOW]->value == '0')
384 if (!p->settings[PZ_NAME])
386 if (database_match_criteria(p->settings, se->service, cl))
396 int predef_grep_databases(void *context, struct conf_service *service,
397 void (*fun)(void *context, struct database *db))
402 for (p = service->databases; p; p = p->next)
403 if (database_match_criteria(p->settings, service, 0))
411 database_hosts_t database_hosts_create(void)
413 database_hosts_t p = xmalloc(sizeof(*p));
416 pazpar2_mutex_create(&p->mutex, "database");
420 void database_hosts_destroy(database_hosts_t *pp)
424 struct host *p = (*pp)->hosts;
427 struct host *p_next = p->next;
428 yaz_mutex_destroy(&p->mutex);
429 yaz_cond_destroy(&p->cond_ready);
435 yaz_mutex_destroy(&(*pp)->mutex);
443 * c-file-style: "Stroustrup"
444 * indent-tabs-mode: nil
446 * vim: shiftwidth=4 tabstop=8 expandtab