1 /* This file is part of Pazpar2.
2 Copyright (C) 2006-2013 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",
89 struct setting_dictionary
96 // This establishes the precedence of wildcard expressions
97 #define SETTING_WILDCARD_NO 0 // No wildcard
98 #define SETTING_WILDCARD_DB 1 // Database wildcard 'host:port/*'
99 #define SETTING_WILDCARD_YES 2 // Complete wildcard '*'
101 // Returns size of settings directory
102 int settings_num(struct conf_service *service)
104 return service->dictionary->num;
107 /* Find and possible create a new dictionary entry. Pass valid NMEM pointer if creation is allowed, otherwise null */
108 static int settings_index_lookup(struct setting_dictionary *dictionary, const char *name, NMEM nmem)
116 if (!strncmp("pz:", name, 3) && (p = strchr(name + 3, ':')))
117 maxlen = (p - name) + 1;
119 maxlen = strlen(name) + 1;
120 for (i = 0; i < dictionary->num; i++)
121 if (!strncmp(name, dictionary->dict[i], maxlen))
125 if (!strncmp("pz:", name, 3))
126 yaz_log(YLOG_WARN, "Adding pz-type setting name %s", name);
127 if (dictionary->num + 1 > dictionary->size)
130 nmem_malloc(nmem, dictionary->size * 2 * sizeof(char*));
131 memcpy(tmp, dictionary->dict, dictionary->size * sizeof(char*));
132 dictionary->dict = tmp;
133 dictionary->size *= 2;
135 dictionary->dict[dictionary->num] = nmem_strdup(nmem, name);
136 dictionary->dict[dictionary->num][maxlen-1] = '\0';
137 return dictionary->num++;
140 int settings_create_offset(struct conf_service *service, const char *name)
142 return settings_index_lookup(service->dictionary, name, service->nmem);
145 int settings_lookup_offset(struct conf_service *service, const char *name)
147 return settings_index_lookup(service->dictionary, name, 0);
150 char *settings_name(struct conf_service *service, int offset)
152 assert(offset < service->dictionary->num);
153 return service->dictionary->dict[offset];
157 // Apply a session override to a database
158 void service_apply_setting(struct conf_service *service, char *setting, char *value)
160 struct setting *new = nmem_malloc(service->nmem, sizeof(*new));
161 int offset = settings_create_offset(service, setting);
162 expand_settings_array(&service->settings->settings, &service->settings->num_settings, offset, service->nmem);
167 new->next = service->settings->settings[offset];
168 service->settings->settings[offset] = new;
172 static int isdir(const char *path)
176 if (stat(path, &st) < 0)
178 yaz_log(YLOG_FATAL|YLOG_ERRNO, "stat %s", path);
181 return st.st_mode & S_IFDIR;
184 // Read settings from an XML file, calling handler function for each setting
185 int settings_read_node_x(xmlNode *n,
187 void (*fun)(void *client_data,
188 struct setting *set))
190 int ret_val = 0; /* success */
191 char *namea = (char *) xmlGetProp(n, (xmlChar *) "name");
192 char *targeta = (char *) xmlGetProp(n, (xmlChar *) "target");
193 char *valuea = (char *) xmlGetProp(n, (xmlChar *) "value");
194 char *usera = (char *) xmlGetProp(n, (xmlChar *) "user");
195 char *precedencea = (char *) xmlGetProp(n, (xmlChar *) "precedence");
197 for (n = n->children; n; n = n->next)
199 if (n->type != XML_ELEMENT_NODE)
201 if (!strcmp((const char *) n->name, "set"))
203 xmlNode *root = n->children;
205 char *name = (char *) xmlGetProp(n, (xmlChar *) "name");
206 char *target = (char *) xmlGetProp(n, (xmlChar *) "target");
207 char *value = (char *) xmlGetProp(n, (xmlChar *) "value");
208 char *user = (char *) xmlGetProp(n, (xmlChar *) "user");
209 char *precedence = (char *) xmlGetProp(n, (xmlChar *) "precedence");
210 xmlChar *buf_out = 0;
215 set.precedence = atoi((char *) precedence);
216 else if (precedencea)
217 set.precedence = atoi((char *) precedencea);
221 set.target = target ? target : targeta;
222 set.name = name ? name : namea;
224 while (root && root->type != XML_ELEMENT_NODE)
227 set.value = value ? value : valuea;
229 { /* xml document content for this setting */
230 xmlDoc *doc = xmlNewDoc(BAD_CAST "1.0");
234 yaz_log(YLOG_WARN, "bad XML content for setting "
235 "name=%s", set.name);
237 yaz_log(YLOG_WARN, "bad XML content for setting");
243 xmlDocSetRootElement(doc, xmlCopyNode(root, 1));
244 xmlDocDumpMemory(doc, &buf_out, &len_out);
245 /* xmlDocDumpMemory 0-terminates */
246 set.value = (char *) buf_out;
251 if (set.name && set.value && set.target)
252 (*fun)(client_data, &set);
256 yaz_log(YLOG_WARN, "missing value and/or target for "
257 "setting name=%s", set.name);
259 yaz_log(YLOG_WARN, "missing name/value/target for setting");
271 yaz_log(YLOG_WARN, "Unknown element %s in settings file",
277 xmlFree(precedencea);
284 static int read_settings_file(const char *path,
286 void (*fun)(void *client_data,
287 struct setting *set))
289 xmlDoc *doc = xmlParseFile(path);
295 yaz_log(YLOG_FATAL, "Failed to parse %s", path);
298 n = xmlDocGetRootElement(doc);
299 ret = settings_read_node_x(n, client_data, fun);
306 // Recursively read files or directories, invoking a
307 // callback for each one
308 static int read_settings(const char *path,
310 void (*fun)(void *client_data,
311 struct setting *set))
320 if (!(d = opendir(path)))
322 yaz_log(YLOG_FATAL|YLOG_ERRNO, "%s", path);
325 while ((de = readdir(d)))
328 if (*de->d_name == '.' || !strcmp(de->d_name, "CVS"))
330 sprintf(tmp, "%s/%s", path, de->d_name);
331 if (read_settings(tmp, client_data, fun))
336 else if ((dot = strrchr(path, '.')) && !strcmp(dot + 1, "xml"))
337 ret = read_settings_file(path, client_data, fun);
341 // Determines if a ZURL is a wildcard, and what kind
342 static int zurl_wildcard(const char *zurl)
345 return SETTING_WILDCARD_NO;
347 return SETTING_WILDCARD_YES;
348 else if (*(zurl + strlen(zurl) - 1) == '*')
349 return SETTING_WILDCARD_DB;
351 return SETTING_WILDCARD_NO;
354 struct update_database_context {
356 struct conf_service *service;
359 void expand_settings_array(struct setting ***set_ar, int *num, int offset,
366 int i, n_num = offset + 10;
367 struct setting **n_ar = nmem_malloc(nmem, n_num * sizeof(*n_ar));
368 for (i = 0; i < *num; i++)
369 n_ar[i] = (*set_ar)[i];
370 for (; i < n_num; i++)
377 void expand_settings_array2(struct settings_array *settings, int offset, NMEM nmem)
381 if (offset >= settings->num_settings)
383 int i, n_num = offset + 10;
384 struct setting **n_ar = nmem_malloc(nmem, n_num * sizeof(*n_ar));
385 for (i = 0; i < settings->num_settings; i++)
386 n_ar[i] = settings->settings[i];
387 for (; i < n_num; i++)
389 settings->num_settings = n_num;
390 settings->settings = n_ar;
394 static void update_settings(struct setting *set, struct settings_array *settings, int offset, NMEM nmem)
397 yaz_log(YLOG_DEBUG, "update service settings offset %d with %s=%s", offset, set->name, set->value);
398 expand_settings_array2(settings, offset, nmem);
400 // First we determine if this setting is overriding any existing settings
401 // with the same name.
402 assert(offset < settings->num_settings);
403 for (sp = &settings->settings[offset]; *sp; )
404 if (!strcmp((*sp)->name, set->name))
406 if ((*sp)->precedence < set->precedence)
408 // We discard the value (nmem keeps track of the space)
409 *sp = (*sp)->next; // unlink value from existing setting
411 else if ((*sp)->precedence > set->precedence)
413 // Db contains a higher-priority setting. Abort search
416 else if (zurl_wildcard((*sp)->target) > zurl_wildcard(set->target))
418 // target-specific value trumps wildcard. Delete.
419 *sp = (*sp)->next; // unlink.....
421 else if (zurl_wildcard((*sp)->target) < zurl_wildcard(set->target))
422 // Db already contains higher-priority setting. Abort search
429 if (!*sp) // is null when there are no higher-priority settings, so we add one
431 struct setting *new = nmem_malloc(nmem, sizeof(*new));
432 memset(new, 0, sizeof(*new));
433 new->precedence = set->precedence;
434 new->target = nmem_strdup_null(nmem, set->target);
435 new->name = nmem_strdup_null(nmem, set->name);
436 new->value = nmem_strdup_null(nmem, set->value);
437 new->next = settings->settings[offset];
438 settings->settings[offset] = new;
443 // This is called from grep_databases -- adds/overrides setting for a target
444 // This is also where the rules for precedence of settings are implemented
445 static void update_database_fun(void *context, struct database *db)
447 struct setting *set = ((struct update_database_context *)
449 struct conf_service *service = ((struct update_database_context *)
454 // Is this the right database?
455 if (!match_zurl(db->id, set->target))
458 offset = settings_create_offset(service, set->name);
459 expand_settings_array(&db->settings, &db->num_settings, offset, service->nmem);
461 // First we determine if this setting is overriding any existing settings
462 // with the same name.
463 assert(offset < db->num_settings);
464 for (sp = &db->settings[offset]; *sp; )
465 if (!strcmp((*sp)->name, set->name))
467 if ((*sp)->precedence < set->precedence)
469 // We discard the value (nmem keeps track of the space)
470 *sp = (*sp)->next; // unlink value from existing setting
472 else if ((*sp)->precedence > set->precedence)
474 // Db contains a higher-priority setting. Abort search
477 else if (zurl_wildcard((*sp)->target) > zurl_wildcard(set->target))
479 // target-specific value trumps wildcard. Delete.
480 *sp = (*sp)->next; // unlink.....
482 else if (zurl_wildcard((*sp)->target) < zurl_wildcard(set->target))
483 // Db already contains higher-priority setting. Abort search
490 if (!*sp) // is null when there are no higher-priority settings, so we add one
492 struct setting *new = nmem_malloc(service->nmem, sizeof(*new));
494 memset(new, 0, sizeof(*new));
495 new->precedence = set->precedence;
496 new->target = nmem_strdup(service->nmem, set->target);
497 new->name = nmem_strdup(service->nmem, set->name);
498 new->value = nmem_strdup(service->nmem, set->value);
499 new->next = db->settings[offset];
500 db->settings[offset] = new;
504 // Callback -- updates database records with dictionary entries as appropriate
505 // This is used in pass 2 to assign name/value pairs to databases
506 static void update_databases(void *client_data, struct setting *set)
508 struct conf_service *service = (struct conf_service *) client_data;
509 struct update_database_context context;
511 context.service = service;
512 predef_grep_databases(&context, service, update_database_fun);
515 // This simply copies the 'hard' (application-specific) settings
516 // to the settings dictionary.
517 static void initialize_hard_settings(struct conf_service *service)
519 struct setting_dictionary *dict = service->dictionary;
520 dict->dict = nmem_malloc(service->nmem, sizeof(hard_settings) - sizeof(char*));
521 dict->size = (sizeof(hard_settings) - sizeof(char*)) / sizeof(char*);
522 memcpy(dict->dict, hard_settings, dict->size * sizeof(char*));
523 dict->num = dict->size;
526 // Read any settings names introduced in service definition (config) and add to dictionary
527 // This is done now to avoid errors if user settings are declared in session overrides
528 void initialize_soft_settings(struct conf_service *service)
531 for (i = 0; i < service->num_metadata; i++)
533 struct conf_metadata *md = &service->metadata[i];
535 if (md->setting != Metadata_setting_no)
536 settings_create_offset(service, md->name);
538 // Also create setting for some metadata attributes.
541 WRBUF wrbuf = wrbuf_alloc();
542 yaz_log(YLOG_DEBUG, "Metadata %s has limitmap: %s ",md->name, md->limitmap);
543 wrbuf_printf(wrbuf, "pz:limitmap:%s", md->name);
544 index = settings_create_offset(service, wrbuf_cstr(wrbuf));
548 yaz_log(YLOG_DEBUG, "Service %s default %s=%s",
549 (service->id ? service->id: "unknown"), wrbuf_cstr(wrbuf), md->limitmap);
550 new.name = (char *) wrbuf_cstr(wrbuf);
551 new.value = md->limitmap;
555 offset = settings_create_offset(service, new.name);
556 update_settings(&new, service->settings, offset, service->nmem);
558 wrbuf_destroy(wrbuf);
559 // TODO same for facetmap
564 static void prepare_target_dictionary(void *client_data, struct setting *set)
566 struct conf_service *service = (struct conf_service *) client_data;
568 // If target address is not wildcard, add the database
569 if (*set->target && !zurl_wildcard(set->target))
570 create_database_for_service(set->target, service);
573 void init_settings(struct conf_service *service)
575 struct setting_dictionary *new;
577 assert(service->nmem);
579 new = nmem_malloc(service->nmem, sizeof(*new));
580 memset(new, 0, sizeof(*new));
581 service->dictionary = new;
582 initialize_hard_settings(service);
583 initialize_soft_settings(service);
586 int settings_read_file(struct conf_service *service, const char *path,
590 return read_settings(path, service, prepare_target_dictionary);
592 return read_settings(path, service, update_databases);
595 int settings_read_node(struct conf_service *service, xmlNode *n,
599 return settings_read_node_x(n, service, prepare_target_dictionary);
601 return settings_read_node_x(n, service, update_databases);
607 * c-file-style: "Stroustrup"
608 * indent-tabs-mode: nil
610 * vim: shiftwidth=4 tabstop=8 expandtab