1 /* This file is part of Pazpar2.
2 Copyright (C) 2006-2012 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[] = {
70 "pz:negotiation_charset",
72 "pz:reuse_connections",
73 "pz:termlist_term_factor",
74 "pz:termlist_term_count",
87 struct setting_dictionary
94 // This establishes the precedence of wildcard expressions
95 #define SETTING_WILDCARD_NO 0 // No wildcard
96 #define SETTING_WILDCARD_DB 1 // Database wildcard 'host:port/*'
97 #define SETTING_WILDCARD_YES 2 // Complete wildcard '*'
99 // Returns size of settings directory
100 int settings_num(struct conf_service *service)
102 return service->dictionary->num;
105 /* Find and possible create a new dictionary entry. Pass valid NMEM pointer if creation is allowed, otherwise null */
106 static int settings_index_lookup(struct setting_dictionary *dictionary, const char *name, NMEM nmem)
114 if (!strncmp("pz:", name, 3) && (p = strchr(name + 3, ':')))
115 maxlen = (p - name) + 1;
117 maxlen = strlen(name) + 1;
118 for (i = 0; i < dictionary->num; i++)
119 if (!strncmp(name, dictionary->dict[i], maxlen))
123 if (!strncmp("pz:", name, 3))
124 yaz_log(YLOG_WARN, "Adding pz-type setting name %s", name);
125 if (dictionary->num + 1 > dictionary->size)
128 nmem_malloc(nmem, dictionary->size * 2 * sizeof(char*));
129 memcpy(tmp, dictionary->dict, dictionary->size * sizeof(char*));
130 dictionary->dict = tmp;
131 dictionary->size *= 2;
133 dictionary->dict[dictionary->num] = nmem_strdup(nmem, name);
134 dictionary->dict[dictionary->num][maxlen-1] = '\0';
135 return dictionary->num++;
138 int settings_create_offset(struct conf_service *service, const char *name)
140 return settings_index_lookup(service->dictionary, name, service->nmem);
143 int settings_lookup_offset(struct conf_service *service, const char *name)
145 return settings_index_lookup(service->dictionary, name, 0);
148 char *settings_name(struct conf_service *service, int offset)
150 assert(offset < service->dictionary->num);
151 return service->dictionary->dict[offset];
155 // Apply a session override to a database
156 void service_apply_setting(struct conf_service *service, char *setting, char *value)
158 struct setting *new = nmem_malloc(service->nmem, sizeof(*new));
159 int offset = settings_create_offset(service, setting);
160 expand_settings_array(&service->settings->settings, &service->settings->num_settings, offset, service->nmem);
165 new->next = service->settings->settings[offset];
166 service->settings->settings[offset] = new;
170 static int isdir(const char *path)
174 if (stat(path, &st) < 0)
176 yaz_log(YLOG_FATAL|YLOG_ERRNO, "stat %s", path);
179 return st.st_mode & S_IFDIR;
182 // Read settings from an XML file, calling handler function for each setting
183 int settings_read_node_x(xmlNode *n,
185 void (*fun)(void *client_data,
186 struct setting *set))
188 int ret_val = 0; /* success */
189 char *namea = (char *) xmlGetProp(n, (xmlChar *) "name");
190 char *targeta = (char *) xmlGetProp(n, (xmlChar *) "target");
191 char *valuea = (char *) xmlGetProp(n, (xmlChar *) "value");
192 char *usera = (char *) xmlGetProp(n, (xmlChar *) "user");
193 char *precedencea = (char *) xmlGetProp(n, (xmlChar *) "precedence");
195 for (n = n->children; n; n = n->next)
197 if (n->type != XML_ELEMENT_NODE)
199 if (!strcmp((const char *) n->name, "set"))
201 xmlNode *root = n->children;
203 char *name = (char *) xmlGetProp(n, (xmlChar *) "name");
204 char *target = (char *) xmlGetProp(n, (xmlChar *) "target");
205 char *value = (char *) xmlGetProp(n, (xmlChar *) "value");
206 char *user = (char *) xmlGetProp(n, (xmlChar *) "user");
207 char *precedence = (char *) xmlGetProp(n, (xmlChar *) "precedence");
208 xmlChar *buf_out = 0;
213 set.precedence = atoi((char *) precedence);
214 else if (precedencea)
215 set.precedence = atoi((char *) precedencea);
219 set.target = target ? target : targeta;
220 set.name = name ? name : namea;
222 while (root && root->type != XML_ELEMENT_NODE)
225 set.value = value ? value : valuea;
227 { /* xml document content for this setting */
228 xmlDoc *doc = xmlNewDoc(BAD_CAST "1.0");
232 yaz_log(YLOG_WARN, "bad XML content for setting "
233 "name=%s", set.name);
235 yaz_log(YLOG_WARN, "bad XML content for setting");
241 xmlDocSetRootElement(doc, xmlCopyNode(root, 1));
242 xmlDocDumpMemory(doc, &buf_out, &len_out);
243 /* xmlDocDumpMemory 0-terminates */
244 set.value = (char *) buf_out;
249 if (set.name && set.value && set.target)
250 (*fun)(client_data, &set);
254 yaz_log(YLOG_WARN, "missing value and/or target for "
255 "setting name=%s", set.name);
257 yaz_log(YLOG_WARN, "missing name/value/target for setting");
269 yaz_log(YLOG_WARN, "Unknown element %s in settings file",
275 xmlFree(precedencea);
282 static int read_settings_file(const char *path,
284 void (*fun)(void *client_data,
285 struct setting *set))
287 xmlDoc *doc = xmlParseFile(path);
293 yaz_log(YLOG_FATAL, "Failed to parse %s", path);
296 n = xmlDocGetRootElement(doc);
297 ret = settings_read_node_x(n, client_data, fun);
304 // Recursively read files or directories, invoking a
305 // callback for each one
306 static int read_settings(const char *path,
308 void (*fun)(void *client_data,
309 struct setting *set))
318 if (!(d = opendir(path)))
320 yaz_log(YLOG_FATAL|YLOG_ERRNO, "%s", path);
323 while ((de = readdir(d)))
326 if (*de->d_name == '.' || !strcmp(de->d_name, "CVS"))
328 sprintf(tmp, "%s/%s", path, de->d_name);
329 if (read_settings(tmp, client_data, fun))
334 else if ((dot = strrchr(path, '.')) && !strcmp(dot + 1, "xml"))
335 ret = read_settings_file(path, client_data, fun);
339 // Determines if a ZURL is a wildcard, and what kind
340 static int zurl_wildcard(const char *zurl)
343 return SETTING_WILDCARD_NO;
345 return SETTING_WILDCARD_YES;
346 else if (*(zurl + strlen(zurl) - 1) == '*')
347 return SETTING_WILDCARD_DB;
349 return SETTING_WILDCARD_NO;
352 struct update_database_context {
354 struct conf_service *service;
357 void expand_settings_array(struct setting ***set_ar, int *num, int offset,
364 int i, n_num = offset + 10;
365 struct setting **n_ar = nmem_malloc(nmem, n_num * sizeof(*n_ar));
366 for (i = 0; i < *num; i++)
367 n_ar[i] = (*set_ar)[i];
368 for (; i < n_num; i++)
375 void expand_settings_array2(struct settings_array *settings, int offset, NMEM nmem)
379 if (offset >= settings->num_settings)
381 int i, n_num = offset + 10;
382 struct setting **n_ar = nmem_malloc(nmem, n_num * sizeof(*n_ar));
383 for (i = 0; i < settings->num_settings; i++)
384 n_ar[i] = settings->settings[i];
385 for (; i < n_num; i++)
387 settings->num_settings = n_num;
388 settings->settings = n_ar;
392 static void update_settings(struct setting *set, struct settings_array *settings, int offset, NMEM nmem)
395 yaz_log(YLOG_LOG, "update service settings offset %d with %s=%s", offset, set->name, set->value);
396 expand_settings_array2(settings, offset, nmem);
398 // First we determine if this setting is overriding any existing settings
399 // with the same name.
400 assert(offset < settings->num_settings);
401 for (sp = &settings->settings[offset]; *sp; )
402 if (!strcmp((*sp)->name, set->name))
404 if ((*sp)->precedence < set->precedence)
406 // We discard the value (nmem keeps track of the space)
407 *sp = (*sp)->next; // unlink value from existing setting
409 else if ((*sp)->precedence > set->precedence)
411 // Db contains a higher-priority setting. Abort search
414 else if (zurl_wildcard((*sp)->target) > zurl_wildcard(set->target))
416 // target-specific value trumps wildcard. Delete.
417 *sp = (*sp)->next; // unlink.....
419 else if (zurl_wildcard((*sp)->target) < zurl_wildcard(set->target))
420 // Db already contains higher-priority setting. Abort search
427 if (!*sp) // is null when there are no higher-priority settings, so we add one
429 struct setting *new = nmem_malloc(nmem, sizeof(*new));
430 memset(new, 0, sizeof(*new));
431 new->precedence = set->precedence;
432 new->target = nmem_strdup_null(nmem, set->target);
433 new->name = nmem_strdup_null(nmem, set->name);
434 new->value = nmem_strdup_null(nmem, set->value);
435 new->next = settings->settings[offset];
436 settings->settings[offset] = new;
441 // This is called from grep_databases -- adds/overrides setting for a target
442 // This is also where the rules for precedence of settings are implemented
443 static void update_database_fun(void *context, struct database *db)
445 struct setting *set = ((struct update_database_context *)
447 struct conf_service *service = ((struct update_database_context *)
452 // Is this the right database?
453 if (!match_zurl(db->id, set->target))
456 offset = settings_create_offset(service, set->name);
457 expand_settings_array(&db->settings, &db->num_settings, offset, service->nmem);
459 // First we determine if this setting is overriding any existing settings
460 // with the same name.
461 assert(offset < db->num_settings);
462 for (sp = &db->settings[offset]; *sp; )
463 if (!strcmp((*sp)->name, set->name))
465 if ((*sp)->precedence < set->precedence)
467 // We discard the value (nmem keeps track of the space)
468 *sp = (*sp)->next; // unlink value from existing setting
470 else if ((*sp)->precedence > set->precedence)
472 // Db contains a higher-priority setting. Abort search
475 else if (zurl_wildcard((*sp)->target) > zurl_wildcard(set->target))
477 // target-specific value trumps wildcard. Delete.
478 *sp = (*sp)->next; // unlink.....
480 else if (zurl_wildcard((*sp)->target) < zurl_wildcard(set->target))
481 // Db already contains higher-priority setting. Abort search
488 if (!*sp) // is null when there are no higher-priority settings, so we add one
490 struct setting *new = nmem_malloc(service->nmem, sizeof(*new));
492 memset(new, 0, sizeof(*new));
493 new->precedence = set->precedence;
494 new->target = nmem_strdup(service->nmem, set->target);
495 new->name = nmem_strdup(service->nmem, set->name);
496 new->value = nmem_strdup(service->nmem, set->value);
497 new->next = db->settings[offset];
498 db->settings[offset] = new;
502 // Callback -- updates database records with dictionary entries as appropriate
503 // This is used in pass 2 to assign name/value pairs to databases
504 static void update_databases(void *client_data, struct setting *set)
506 struct conf_service *service = (struct conf_service *) client_data;
507 struct update_database_context context;
509 context.service = service;
510 predef_grep_databases(&context, service, update_database_fun);
513 // This simply copies the 'hard' (application-specific) settings
514 // to the settings dictionary.
515 static void initialize_hard_settings(struct conf_service *service)
517 struct setting_dictionary *dict = service->dictionary;
518 dict->dict = nmem_malloc(service->nmem, sizeof(hard_settings) - sizeof(char*));
519 dict->size = (sizeof(hard_settings) - sizeof(char*)) / sizeof(char*);
520 memcpy(dict->dict, hard_settings, dict->size * sizeof(char*));
521 dict->num = dict->size;
524 // Read any settings names introduced in service definition (config) and add to dictionary
525 // This is done now to avoid errors if user settings are declared in session overrides
526 void initialize_soft_settings(struct conf_service *service)
529 for (i = 0; i < service->num_metadata; i++)
531 struct conf_metadata *md = &service->metadata[i];
533 if (md->setting != Metadata_setting_no)
534 settings_create_offset(service, md->name);
536 // Also create setting for some metadata attributes.
539 WRBUF wrbuf = wrbuf_alloc();
540 yaz_log(YLOG_DEBUG, "Metadata %s has limitmap: %s ",md->name, md->limitmap);
541 wrbuf_printf(wrbuf, "pz:limitmap:%s", md->name);
542 index = settings_create_offset(service, wrbuf_cstr(wrbuf));
546 yaz_log(YLOG_DEBUG, "Service %s default %s=%s",
547 (service->id ? service->id: "unknown"), wrbuf_cstr(wrbuf), md->limitmap);
548 new.name = (char *) wrbuf_cstr(wrbuf);
549 new.value = md->limitmap;
553 offset = settings_create_offset(service, new.name);
554 update_settings(&new, service->settings, offset, service->nmem);
556 wrbuf_destroy(wrbuf);
557 // TODO same for facetmap
562 static void prepare_target_dictionary(void *client_data, struct setting *set)
564 struct conf_service *service = (struct conf_service *) client_data;
566 // If target address is not wildcard, add the database
567 if (*set->target && !zurl_wildcard(set->target))
568 create_database_for_service(set->target, service);
571 void init_settings(struct conf_service *service)
573 struct setting_dictionary *new;
575 assert(service->nmem);
577 new = nmem_malloc(service->nmem, sizeof(*new));
578 memset(new, 0, sizeof(*new));
579 service->dictionary = new;
580 initialize_hard_settings(service);
581 initialize_soft_settings(service);
584 int settings_read_file(struct conf_service *service, const char *path,
588 return read_settings(path, service, prepare_target_dictionary);
590 return read_settings(path, service, update_databases);
593 int settings_read_node(struct conf_service *service, xmlNode *n,
597 return settings_read_node_x(n, service, prepare_target_dictionary);
599 return settings_read_node_x(n, service, update_databases);
605 * c-file-style: "Stroustrup"
606 * indent-tabs-mode: nil
608 * vim: shiftwidth=4 tabstop=8 expandtab