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
20 // This module implements a generic system of settings
21 // (attribute-value) that can be associated with search targets. The
22 // system supports both default values, per-target overrides, and
33 #include <sys/types.h>
34 #include <yaz/dirent.h>
38 #include <libxml/parser.h>
39 #include <libxml/tree.h>
48 // Used for initializing setting_dictionary with pazpar2-specific settings
49 static char *hard_settings[] = {
71 "pz:negotiation_charset",
73 "pz:reuse_connections", /* PZ_REUSE_CONNECTION */
74 "pz:termlist_term_factor", /* PZ_TERMLIST_TERM_FACTOR*/
75 "pz:preferred", /* PZ_PREFERRED */
76 "pz:extra_args", /* PZ_EXTRA_ARGS */
77 "pz:query_syntax", /* PZ_QUERY_SYNTAX */
78 "pz:option_recordfilter", /* PZ_OPTION_RECORDFILTER */
79 "pz:facetmap:", /* PZ_FACETMAP */
80 "pz:limitmap:", /* PZ_LIMITMAP */
84 struct setting_dictionary
91 // This establishes the precedence of wildcard expressions
92 #define SETTING_WILDCARD_NO 0 // No wildcard
93 #define SETTING_WILDCARD_DB 1 // Database wildcard 'host:port/*'
94 #define SETTING_WILDCARD_YES 2 // Complete wildcard '*'
96 // Returns size of settings directory
97 int settings_num(struct conf_service *service)
99 return service->dictionary->num;
102 static int settings_lookup(struct conf_service *service, const char *name,
108 struct setting_dictionary *dictionary = service->dictionary;
112 if (!strncmp("pz:", name, 3) && (p = strchr(name + 3, ':')))
113 maxlen = (p - name) + 1;
115 maxlen = strlen(name) + 1;
116 for (i = 0; i < dictionary->num; i++)
117 if (!strncmp(name, dictionary->dict[i], maxlen))
121 if (!strncmp("pz:", name, 3))
122 yaz_log(YLOG_WARN, "Adding pz-type setting name %s", name);
123 if (dictionary->num + 1 > dictionary->size)
126 nmem_malloc(service->nmem, dictionary->size * 2 * sizeof(char*));
127 memcpy(tmp, dictionary->dict, dictionary->size * sizeof(char*));
128 dictionary->dict = tmp;
129 dictionary->size *= 2;
131 dictionary->dict[dictionary->num] = nmem_strdup(service->nmem, name);
132 dictionary->dict[dictionary->num][maxlen-1] = '\0';
133 return dictionary->num++;
136 int settings_create_offset(struct conf_service *service, const char *name)
138 return settings_lookup(service, name, 1);
141 int settings_lookup_offset(struct conf_service *service, const char *name)
143 return settings_lookup(service, name, 0);
146 char *settings_name(struct conf_service *service, int offset)
148 assert(offset < service->dictionary->num);
149 return service->dictionary->dict[offset];
152 static int isdir(const char *path)
156 if (stat(path, &st) < 0)
158 yaz_log(YLOG_FATAL|YLOG_ERRNO, "stat %s", path);
161 return st.st_mode & S_IFDIR;
164 // Read settings from an XML file, calling handler function for each setting
165 void settings_read_node_x(xmlNode *n,
167 void (*fun)(void *client_data,
168 struct setting *set))
170 xmlChar *namea, *targeta, *valuea, *usera, *precedencea;
172 namea = xmlGetProp(n, (xmlChar *) "name");
173 targeta = xmlGetProp(n, (xmlChar *) "target");
174 valuea = xmlGetProp(n, (xmlChar *) "value");
175 usera = xmlGetProp(n, (xmlChar *) "user");
176 precedencea = xmlGetProp(n, (xmlChar *) "precedence");
177 for (n = n->children; n; n = n->next)
179 if (n->type != XML_ELEMENT_NODE)
181 if (!strcmp((const char *) n->name, "set"))
183 char *name, *target, *value, *user, *precedence;
185 name = (char *) xmlGetProp(n, (xmlChar *) "name");
186 target = (char *) xmlGetProp(n, (xmlChar *) "target");
187 value = (char *) xmlGetProp(n, (xmlChar *) "value");
188 user = (char *) xmlGetProp(n, (xmlChar *) "user");
189 precedence = (char *) xmlGetProp(n, (xmlChar *) "precedence");
191 if ((!name && !namea) || (!value && !valuea) || (!target && !targeta))
193 yaz_log(YLOG_FATAL, "set must specify name, value, and target");
203 // Copy everything into a temporary buffer -- we decide
204 // later if we are keeping it.
206 set.precedence = atoi((char *) precedence);
207 else if (precedencea)
208 set.precedence = atoi((char *) precedencea);
212 strcpy(targetb, target);
214 strcpy(targetb, (const char *) targeta);
215 set.target = targetb;
219 strcpy(nameb, (const char *) namea);
222 strcpy(valueb, value);
224 strcpy(valueb, (const char *) valuea);
227 (*fun)(client_data, &set);
237 yaz_log(YLOG_FATAL, "Unknown element %s in settings file", (char*) n->name);
242 xmlFree(precedencea);
248 static void read_settings_file(const char *path,
250 void (*fun)(void *client_data,
251 struct setting *set))
253 xmlDoc *doc = xmlParseFile(path);
258 yaz_log(YLOG_FATAL, "Failed to parse %s", path);
261 n = xmlDocGetRootElement(doc);
262 settings_read_node_x(n, client_data, fun);
268 // Recursively read files or directories, invoking a
269 // callback for each one
270 static void read_settings(const char *path,
272 void (*fun)(void *client_data,
273 struct setting *set))
281 if (!(d = opendir(path)))
283 yaz_log(YLOG_FATAL|YLOG_ERRNO, "%s", path);
286 while ((de = readdir(d)))
289 if (*de->d_name == '.' || !strcmp(de->d_name, "CVS"))
291 sprintf(tmp, "%s/%s", path, de->d_name);
292 read_settings(tmp, client_data, fun);
296 else if ((dot = strrchr(path, '.')) && !strcmp(dot + 1, "xml"))
297 read_settings_file(path, client_data, fun);
300 // Determines if a ZURL is a wildcard, and what kind
301 static int zurl_wildcard(const char *zurl)
304 return SETTING_WILDCARD_NO;
306 return SETTING_WILDCARD_YES;
307 else if (*(zurl + strlen(zurl) - 1) == '*')
308 return SETTING_WILDCARD_DB;
310 return SETTING_WILDCARD_NO;
313 struct update_database_context {
315 struct conf_service *service;
318 void expand_settings_array(struct setting ***set_ar, int *num, int offset,
325 int i, n_num = offset + 10;
326 struct setting **n_ar = nmem_malloc(nmem, n_num * sizeof(*n_ar));
327 for (i = 0; i < *num; i++)
328 n_ar[i] = (*set_ar)[i];
329 for (; i < n_num; i++)
336 // This is called from grep_databases -- adds/overrides setting for a target
337 // This is also where the rules for precedence of settings are implemented
338 static void update_database(void *context, struct database *db)
340 struct setting *set = ((struct update_database_context *)
342 struct conf_service *service = ((struct update_database_context *)
347 // Is this the right database?
348 if (!match_zurl(db->url, set->target))
351 offset = settings_create_offset(service, set->name);
352 expand_settings_array(&db->settings, &db->num_settings, offset,
355 // First we determine if this setting is overriding any existing settings
356 // with the same name.
357 assert(offset < db->num_settings);
358 for (sp = &db->settings[offset]; *sp; )
359 if (!strcmp((*sp)->name, set->name))
361 if ((*sp)->precedence < set->precedence)
363 // We discard the value (nmem keeps track of the space)
364 *sp = (*sp)->next; // unlink value from existing setting
366 else if ((*sp)->precedence > set->precedence)
368 // Db contains a higher-priority setting. Abort search
371 else if (zurl_wildcard((*sp)->target) > zurl_wildcard(set->target))
373 // target-specific value trumps wildcard. Delete.
374 *sp = (*sp)->next; // unlink.....
376 else if (zurl_wildcard((*sp)->target) < zurl_wildcard(set->target))
377 // Db already contains higher-priority setting. Abort search
384 if (!*sp) // is null when there are no higher-priority settings, so we add one
386 struct setting *new = nmem_malloc(service->nmem, sizeof(*new));
388 memset(new, 0, sizeof(*new));
389 new->precedence = set->precedence;
390 new->target = nmem_strdup(service->nmem, set->target);
391 new->name = nmem_strdup(service->nmem, set->name);
392 new->value = nmem_strdup(service->nmem, set->value);
393 new->next = db->settings[offset];
394 db->settings[offset] = new;
398 // Callback -- updates database records with dictionary entries as appropriate
399 // This is used in pass 2 to assign name/value pairs to databases
400 static void update_databases(void *client_data, struct setting *set)
402 struct conf_service *service = (struct conf_service *) client_data;
403 struct update_database_context context;
405 context.service = service;
406 predef_grep_databases(&context, service, update_database);
409 // This simply copies the 'hard' (application-specific) settings
410 // to the settings dictionary.
411 static void initialize_hard_settings(struct conf_service *service)
413 struct setting_dictionary *dict = service->dictionary;
414 dict->dict = nmem_malloc(service->nmem, sizeof(hard_settings) - sizeof(char*));
415 dict->size = (sizeof(hard_settings) - sizeof(char*)) / sizeof(char*);
416 memcpy(dict->dict, hard_settings, dict->size * sizeof(char*));
417 dict->num = dict->size;
420 // Read any settings names introduced in service definition (config) and add to dictionary
421 // This is done now to avoid errors if user settings are declared in session overrides
422 static void initialize_soft_settings(struct conf_service *service)
426 for (i = 0; i < service->num_metadata; i++)
428 struct conf_metadata *md = &service->metadata[i];
430 if (md->setting == Metadata_setting_no)
433 settings_create_offset(service, md->name);
437 static void prepare_target_dictionary(void *client_data, struct setting *set)
439 struct conf_service *service = (struct conf_service *) client_data;
440 struct setting_dictionary *dictionary = service->dictionary;
445 // If target address is not wildcard, add the database
446 if (*set->target && !zurl_wildcard(set->target))
447 find_database(set->target, service);
449 // Determine if we already have a dictionary entry
450 if (!strncmp(set->name, "pz:", 3) && (p = strchr(set->name + 3, ':')))
452 for (i = 0; i < dictionary->num; i++)
453 if (!strcmp(dictionary->dict[i], set->name))
455 yaz_log(YLOG_WARN, "Setting '%s' not configured as metadata", set->name);
458 void init_settings(struct conf_service *service)
460 struct setting_dictionary *new;
462 assert(service->nmem);
464 new = nmem_malloc(service->nmem, sizeof(*new));
465 memset(new, 0, sizeof(*new));
466 service->dictionary = new;
467 initialize_hard_settings(service);
468 initialize_soft_settings(service);
471 void settings_read_file(struct conf_service *service, const char *path,
475 read_settings(path, service, prepare_target_dictionary);
477 read_settings(path, service, update_databases);
480 void settings_read_node(struct conf_service *service, xmlNode *n,
484 settings_read_node_x(n, service, prepare_target_dictionary);
486 settings_read_node_x(n, service, update_databases);
492 * c-file-style: "Stroustrup"
493 * indent-tabs-mode: nil
495 * vim: shiftwidth=4 tabstop=8 expandtab