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>
38 #include <sys/types.h>
40 #include <sys/socket.h>
46 #include <netinet/in.h>
49 enum pazpar2_database_criterion_type {
51 PAZPAR2_SUBSTRING_MATCH
54 struct database_criterion_value {
56 struct database_criterion_value *next;
59 struct database_criterion {
61 enum pazpar2_database_criterion_type type;
62 struct database_criterion_value *values;
63 struct database_criterion *next;
67 struct database_hosts {
72 static xmlDoc *get_explain_xml(struct conf_targetprofiles *targetprofiles,
79 if (targetprofiles->type != Targetprofiles_local)
81 yaz_log(YLOG_FATAL, "Only supports local type");
84 dir = targetprofiles->src;
86 sprintf(path, "%s/%s", dir, ide);
88 return xmlParseFile(path);
93 // Create a new host structure for hostport
94 static struct host *create_host(const char *hostport, iochan_man_t iochan_man)
98 host = xmalloc(sizeof(struct host));
99 host->hostport = xstrdup(hostport);
100 host->connections = 0;
104 if (host_getaddrinfo(host, iochan_man))
106 xfree(host->hostport);
110 yaz_mutex_create(&host->mutex);
115 static struct host *find_host(database_hosts_t hosts,
116 const char *hostport, iochan_man_t iochan_man)
119 yaz_mutex_enter(hosts->mutex);
120 for (p = hosts->hosts; p; p = p->next)
121 if (!strcmp(p->hostport, hostport))
125 p = create_host(hostport, iochan_man);
128 p->next = hosts->hosts;
132 yaz_mutex_leave(hosts->mutex);
136 int resolve_database(struct conf_service *service, struct database *db)
143 strcpy(hostport, db->url);
144 if ((p = strchr(hostport, '/')))
146 if (!(host = find_host(service->server->database_hosts,
147 hostport, service->server->iochan_man)))
154 void resolve_databases(struct conf_service *service)
156 struct database *db = service->databases;
157 for (; db; db = db->next)
158 resolve_database(service, db);
161 struct database *new_database(const char *id, NMEM nmem)
166 struct setting *idset;
168 if (strlen(id) > 255)
170 strcpy(hostport, id);
171 if ((dbname = strchr(hostport, '/')))
175 db = nmem_malloc(nmem, sizeof(*db));
176 memset(db, 0, sizeof(*db));
178 db->url = nmem_strdup(nmem, id);
179 db->databases = nmem_malloc(nmem, 2 * sizeof(char *));
180 db->databases[0] = nmem_strdup(nmem, dbname);
181 db->databases[1] = 0;
185 db->num_settings = PZ_NEGOTIATION_CHARSET+1;
186 db->settings = nmem_malloc(nmem, sizeof(struct settings*) *
188 memset(db->settings, 0, sizeof(struct settings*) * db->num_settings);
189 idset = nmem_malloc(nmem, sizeof(*idset));
190 idset->precedence = 0;
191 idset->name = "pz:id";
192 idset->target = idset->value = db->url;
194 db->settings[PZ_ID] = idset;
200 static struct database *load_database(const char *id,
201 struct conf_service *service)
204 struct zr_explain *explain = 0;
207 if (service->targetprofiles
208 && (doc = get_explain_xml(service->targetprofiles, id)))
210 explain = zr_read_xml(service->nmem, xmlDocGetRootElement(doc));
214 db = new_database(id, service->nmem);
215 db->explain = explain;
216 db->next = service->databases;
217 service->databases = db;
222 // Return a database structure by ID. Load and add to list if necessary
223 // new==1 just means we know it's not in the list
224 struct database *find_database(const char *id, struct conf_service *service)
227 for (p = service->databases; p; p = p->next)
228 if (!strcmp(p->url, id))
230 return load_database(id, service);
233 // This whole session_grep database thing should be moved elsewhere
235 int match_zurl(const char *zurl, const char *pattern)
239 if (!strcmp(pattern, "*"))
241 else if (!strncmp(pattern, "*/", 2)) // host wildcard.. what the heck is that for?
243 char *db = strchr(zurl, '/');
246 if (!strcmp(pattern + 2, db))
251 else if (*(pattern + (len = strlen(pattern) - 1)) == '*') // db wildcard
253 if (!strncmp(pattern, zurl, len))
258 else if (!strcmp(pattern, zurl))
264 // This will be generalized at some point
265 static int match_criterion(struct setting **settings,
266 struct conf_service *service,
267 struct database_criterion *c)
269 int offset = settings_lookup_offset(service, c->name);
270 struct database_criterion_value *v;
274 yaz_log(YLOG_WARN, "Criterion not found: %s", c->name);
277 if (!settings[offset])
279 for (v = c->values; v; v = v->next)
281 if (c->type == PAZPAR2_STRING_MATCH)
285 if (match_zurl(settings[offset]->value, v->value))
290 if (!strcmp(settings[offset]->value, v->value))
294 else if (c->type == PAZPAR2_SUBSTRING_MATCH)
296 if (strstr(settings[offset]->value, v->value))
306 // parses crit1=val1,crit2=val2|val3,...
307 static struct database_criterion *create_database_criterion(NMEM m,
310 struct database_criterion *res = 0;
317 nmem_strsplit(m, ",", buf, &values, &num);
318 for (i = 0; i < num; i++)
323 struct database_criterion *new = nmem_malloc(m, sizeof(*new));
325 if ((eq = strchr(values[i], '=')))
326 new->type = PAZPAR2_STRING_MATCH;
327 else if ((eq = strchr(values[i], '~')))
328 new->type = PAZPAR2_SUBSTRING_MATCH;
331 yaz_log(YLOG_WARN, "Missing equal-sign/tilde in filter");
335 new->name = values[i];
336 nmem_strsplit(m, "|", eq, &subvalues, &subnum);
338 for (subi = 0; subi < subnum; subi++)
340 struct database_criterion_value *newv
341 = nmem_malloc(m, sizeof(*newv));
342 newv->value = subvalues[subi];
343 newv->next = new->values;
352 static int database_match_criteria(struct setting **settings,
353 struct conf_service *service,
354 struct database_criterion *cl)
356 for (; cl; cl = cl->next)
357 if (!match_criterion(settings, service, cl))
359 if (cl) // one of the criteria failed to match -- skip this db
365 // Cycles through databases, calling a handler function on the ones for
366 // which all criteria matched.
367 int session_grep_databases(struct session *se, const char *filter,
368 void (*fun)(void *context, struct session_database *db))
370 struct session_database *p;
371 NMEM nmem = nmem_create();
373 struct database_criterion *cl = create_database_criterion(nmem, filter);
375 for (p = se->databases; p; p = p->next)
377 if (p->settings && p->settings[PZ_ALLOW] && *p->settings[PZ_ALLOW]->value == '0')
379 if (!p->settings[PZ_NAME])
381 if (database_match_criteria(p->settings, se->service, cl))
391 int predef_grep_databases(void *context, struct conf_service *service,
392 void (*fun)(void *context, struct database *db))
397 for (p = service->databases; p; p = p->next)
398 if (database_match_criteria(p->settings, service, 0))
406 database_hosts_t database_hosts_create(void)
408 database_hosts_t p = xmalloc(sizeof(*p));
411 yaz_mutex_create(&p->mutex);
418 * c-file-style: "Stroustrup"
419 * indent-tabs-mode: nil
421 * vim: shiftwidth=4 tabstop=8 expandtab