1 /* This file is part of Pazpar2.
2 Copyright (C) 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",
85 "pz:authentication_mode",
90 struct setting_dictionary
97 // This establishes the precedence of wildcard expressions
98 #define SETTING_WILDCARD_NO 0 // No wildcard
99 #define SETTING_WILDCARD_DB 1 // Database wildcard 'host:port/*'
100 #define SETTING_WILDCARD_YES 2 // Complete wildcard '*'
102 // Returns size of settings directory
103 int settings_num(struct conf_service *service)
105 return service->dictionary->num;
108 /* Find and possible create a new dictionary entry. Pass valid NMEM pointer if creation is allowed, otherwise null */
109 static int settings_index_lookup(struct setting_dictionary *dictionary, const char *name, NMEM nmem)
117 if (!strncmp("pz:", name, 3) && (p = strchr(name + 3, ':')))
118 maxlen = (p - name) + 1;
120 maxlen = strlen(name) + 1;
121 for (i = 0; i < dictionary->num; i++)
122 if (!strncmp(name, dictionary->dict[i], maxlen))
126 if (!strncmp("pz:", name, 3))
127 yaz_log(YLOG_WARN, "Adding pz-type setting name %s", name);
128 if (dictionary->num + 1 > dictionary->size)
131 nmem_malloc(nmem, dictionary->size * 2 * sizeof(char*));
132 memcpy(tmp, dictionary->dict, dictionary->size * sizeof(char*));
133 dictionary->dict = tmp;
134 dictionary->size *= 2;
136 dictionary->dict[dictionary->num] = nmem_strdup(nmem, name);
137 dictionary->dict[dictionary->num][maxlen-1] = '\0';
138 return dictionary->num++;
141 int settings_create_offset(struct conf_service *service, const char *name)
143 return settings_index_lookup(service->dictionary, name, service->nmem);
146 int settings_lookup_offset(struct conf_service *service, const char *name)
148 return settings_index_lookup(service->dictionary, name, 0);
151 char *settings_name(struct conf_service *service, int offset)
153 assert(offset < service->dictionary->num);
154 return service->dictionary->dict[offset];
158 // Apply a session override to a database
159 void service_apply_setting(struct conf_service *service, char *setting, char *value)
161 struct setting *new = nmem_malloc(service->nmem, sizeof(*new));
162 int offset = settings_create_offset(service, setting);
163 expand_settings_array(&service->settings->settings, &service->settings->num_settings, offset, service->nmem);
168 new->next = service->settings->settings[offset];
169 service->settings->settings[offset] = new;
173 static int isdir(const char *path)
177 if (stat(path, &st) < 0)
179 yaz_log(YLOG_FATAL|YLOG_ERRNO, "stat %s", path);
182 return st.st_mode & S_IFDIR;
185 // Read settings from an XML file, calling handler function for each setting
186 int settings_read_node_x(xmlNode *n,
188 void (*fun)(void *client_data,
189 struct setting *set))
191 int ret_val = 0; /* success */
192 char *namea = (char *) xmlGetProp(n, (xmlChar *) "name");
193 char *targeta = (char *) xmlGetProp(n, (xmlChar *) "target");
194 char *valuea = (char *) xmlGetProp(n, (xmlChar *) "value");
195 char *usera = (char *) xmlGetProp(n, (xmlChar *) "user");
196 char *precedencea = (char *) xmlGetProp(n, (xmlChar *) "precedence");
198 for (n = n->children; n; n = n->next)
200 if (n->type != XML_ELEMENT_NODE)
202 if (!strcmp((const char *) n->name, "set"))
204 xmlNode *root = n->children;
206 char *name = (char *) xmlGetProp(n, (xmlChar *) "name");
207 char *target = (char *) xmlGetProp(n, (xmlChar *) "target");
208 char *value = (char *) xmlGetProp(n, (xmlChar *) "value");
209 char *user = (char *) xmlGetProp(n, (xmlChar *) "user");
210 char *precedence = (char *) xmlGetProp(n, (xmlChar *) "precedence");
211 xmlChar *buf_out = 0;
216 set.precedence = atoi((char *) precedence);
217 else if (precedencea)
218 set.precedence = atoi((char *) precedencea);
222 set.target = target ? target : targeta;
223 set.name = name ? name : namea;
225 while (root && root->type != XML_ELEMENT_NODE)
228 set.value = value ? value : valuea;
230 { /* xml document content for this setting */
231 xmlDoc *doc = xmlNewDoc(BAD_CAST "1.0");
235 yaz_log(YLOG_WARN, "bad XML content for setting "
236 "name=%s", set.name);
238 yaz_log(YLOG_WARN, "bad XML content for setting");
244 xmlDocSetRootElement(doc, xmlCopyNode(root, 1));
245 xmlDocDumpMemory(doc, &buf_out, &len_out);
246 /* xmlDocDumpMemory 0-terminates */
247 set.value = (char *) buf_out;
252 if (set.name && set.value && set.target)
253 (*fun)(client_data, &set);
257 yaz_log(YLOG_WARN, "missing value and/or target for "
258 "setting name=%s", set.name);
260 yaz_log(YLOG_WARN, "missing name/value/target for setting");
272 yaz_log(YLOG_WARN, "Unknown element %s in settings file",
278 xmlFree(precedencea);
285 static int read_settings_file(const char *path,
287 void (*fun)(void *client_data,
288 struct setting *set))
290 xmlDoc *doc = xmlParseFile(path);
296 yaz_log(YLOG_FATAL, "Failed to parse %s", path);
299 n = xmlDocGetRootElement(doc);
300 ret = settings_read_node_x(n, client_data, fun);
307 // Recursively read files or directories, invoking a
308 // callback for each one
309 static int read_settings(const char *path,
311 void (*fun)(void *client_data,
312 struct setting *set))
321 if (!(d = opendir(path)))
323 yaz_log(YLOG_FATAL|YLOG_ERRNO, "%s", path);
326 while ((de = readdir(d)))
329 if (*de->d_name == '.' || !strcmp(de->d_name, "CVS"))
331 sprintf(tmp, "%s/%s", path, de->d_name);
332 if (read_settings(tmp, client_data, fun))
337 else if ((dot = strrchr(path, '.')) && !strcmp(dot + 1, "xml"))
338 ret = read_settings_file(path, client_data, fun);
342 // Determines if a ZURL is a wildcard, and what kind
343 static int zurl_wildcard(const char *zurl)
346 return SETTING_WILDCARD_NO;
348 return SETTING_WILDCARD_YES;
349 else if (*(zurl + strlen(zurl) - 1) == '*')
350 return SETTING_WILDCARD_DB;
352 return SETTING_WILDCARD_NO;
355 struct update_database_context {
357 struct conf_service *service;
360 void expand_settings_array(struct setting ***set_ar, int *num, int offset,
367 int i, n_num = offset + 10;
368 struct setting **n_ar = nmem_malloc(nmem, n_num * sizeof(*n_ar));
369 for (i = 0; i < *num; i++)
370 n_ar[i] = (*set_ar)[i];
371 for (; i < n_num; i++)
378 void expand_settings_array2(struct settings_array *settings, int offset, NMEM nmem)
382 if (offset >= settings->num_settings)
384 int i, n_num = offset + 10;
385 struct setting **n_ar = nmem_malloc(nmem, n_num * sizeof(*n_ar));
386 for (i = 0; i < settings->num_settings; i++)
387 n_ar[i] = settings->settings[i];
388 for (; i < n_num; i++)
390 settings->num_settings = n_num;
391 settings->settings = n_ar;
395 static void update_settings(struct setting *set, struct settings_array *settings, int offset, NMEM nmem)
398 yaz_log(YLOG_DEBUG, "update service settings offset %d with %s=%s", offset, set->name, set->value);
399 expand_settings_array2(settings, offset, nmem);
401 // First we determine if this setting is overriding any existing settings
402 // with the same name.
403 assert(offset < settings->num_settings);
404 for (sp = &settings->settings[offset]; *sp; )
405 if (!strcmp((*sp)->name, set->name))
407 if ((*sp)->precedence < set->precedence)
409 // We discard the value (nmem keeps track of the space)
410 *sp = (*sp)->next; // unlink value from existing setting
412 else if ((*sp)->precedence > set->precedence)
414 // Db contains a higher-priority setting. Abort search
417 else if (zurl_wildcard((*sp)->target) > zurl_wildcard(set->target))
419 // target-specific value trumps wildcard. Delete.
420 *sp = (*sp)->next; // unlink.....
422 else if (zurl_wildcard((*sp)->target) < zurl_wildcard(set->target))
423 // Db already contains higher-priority setting. Abort search
430 if (!*sp) // is null when there are no higher-priority settings, so we add one
432 struct setting *new = nmem_malloc(nmem, sizeof(*new));
433 memset(new, 0, sizeof(*new));
434 new->precedence = set->precedence;
435 new->target = nmem_strdup_null(nmem, set->target);
436 new->name = nmem_strdup_null(nmem, set->name);
437 new->value = nmem_strdup_null(nmem, set->value);
438 new->next = settings->settings[offset];
439 settings->settings[offset] = new;
444 // This is called from grep_databases -- adds/overrides setting for a target
445 // This is also where the rules for precedence of settings are implemented
446 static void update_database_fun(void *context, struct database *db)
448 struct setting *set = ((struct update_database_context *)
450 struct conf_service *service = ((struct update_database_context *)
455 // Is this the right database?
456 if (!match_zurl(db->id, set->target))
459 offset = settings_create_offset(service, set->name);
460 expand_settings_array(&db->settings, &db->num_settings, offset, service->nmem);
462 // First we determine if this setting is overriding any existing settings
463 // with the same name.
464 assert(offset < db->num_settings);
465 for (sp = &db->settings[offset]; *sp; )
466 if (!strcmp((*sp)->name, set->name))
468 if ((*sp)->precedence < set->precedence)
470 // We discard the value (nmem keeps track of the space)
471 *sp = (*sp)->next; // unlink value from existing setting
473 else if ((*sp)->precedence > set->precedence)
475 // Db contains a higher-priority setting. Abort search
478 else if (zurl_wildcard((*sp)->target) > zurl_wildcard(set->target))
480 // target-specific value trumps wildcard. Delete.
481 *sp = (*sp)->next; // unlink.....
483 else if (zurl_wildcard((*sp)->target) < zurl_wildcard(set->target))
484 // Db already contains higher-priority setting. Abort search
491 if (!*sp) // is null when there are no higher-priority settings, so we add one
493 struct setting *new = nmem_malloc(service->nmem, sizeof(*new));
495 memset(new, 0, sizeof(*new));
496 new->precedence = set->precedence;
497 new->target = nmem_strdup(service->nmem, set->target);
498 new->name = nmem_strdup(service->nmem, set->name);
499 new->value = nmem_strdup(service->nmem, set->value);
500 new->next = db->settings[offset];
501 db->settings[offset] = new;
505 // Callback -- updates database records with dictionary entries as appropriate
506 // This is used in pass 2 to assign name/value pairs to databases
507 static void update_databases(void *client_data, struct setting *set)
509 struct conf_service *service = (struct conf_service *) client_data;
510 struct update_database_context context;
512 context.service = service;
513 predef_grep_databases(&context, service, update_database_fun);
516 // This simply copies the 'hard' (application-specific) settings
517 // to the settings dictionary.
518 static void initialize_hard_settings(struct conf_service *service)
520 struct setting_dictionary *dict = service->dictionary;
521 dict->dict = nmem_malloc(service->nmem, sizeof(hard_settings) - sizeof(char*));
522 dict->size = (sizeof(hard_settings) - sizeof(char*)) / sizeof(char*);
523 memcpy(dict->dict, hard_settings, dict->size * sizeof(char*));
524 dict->num = dict->size;
527 // Read any settings names introduced in service definition (config) and add to dictionary
528 // This is done now to avoid errors if user settings are declared in session overrides
529 void initialize_soft_settings(struct conf_service *service)
532 for (i = 0; i < service->num_metadata; i++)
534 struct conf_metadata *md = &service->metadata[i];
536 if (md->setting != Metadata_setting_no)
537 settings_create_offset(service, md->name);
539 // Also create setting for some metadata attributes.
542 WRBUF wrbuf = wrbuf_alloc();
543 yaz_log(YLOG_DEBUG, "Metadata %s has limitmap: %s ",md->name, md->limitmap);
544 wrbuf_printf(wrbuf, "pz:limitmap:%s", md->name);
545 index = settings_create_offset(service, wrbuf_cstr(wrbuf));
549 yaz_log(YLOG_DEBUG, "Service %s default %s=%s",
550 (service->id ? service->id: "unknown"), wrbuf_cstr(wrbuf), md->limitmap);
551 new.name = (char *) wrbuf_cstr(wrbuf);
552 new.value = md->limitmap;
556 offset = settings_create_offset(service, new.name);
557 update_settings(&new, service->settings, offset, service->nmem);
559 wrbuf_destroy(wrbuf);
560 // TODO same for facetmap
565 static void prepare_target_dictionary(void *client_data, struct setting *set)
567 struct conf_service *service = (struct conf_service *) client_data;
569 // If target address is not wildcard, add the database
570 if (*set->target && !zurl_wildcard(set->target))
571 create_database_for_service(set->target, service);
574 void init_settings(struct conf_service *service)
576 struct setting_dictionary *new;
578 assert(service->nmem);
580 new = nmem_malloc(service->nmem, sizeof(*new));
581 memset(new, 0, sizeof(*new));
582 service->dictionary = new;
583 initialize_hard_settings(service);
584 initialize_soft_settings(service);
587 int settings_read_file(struct conf_service *service, const char *path,
591 return read_settings(path, service, prepare_target_dictionary);
593 return read_settings(path, service, update_databases);
596 int settings_read_node(struct conf_service *service, xmlNode *n,
600 return settings_read_node_x(n, service, prepare_target_dictionary);
602 return settings_read_node_x(n, service, update_databases);
608 * c-file-style: "Stroustrup"
609 * indent-tabs-mode: nil
611 * vim: shiftwidth=4 tabstop=8 expandtab