2 * collectd - src/curl_xml.c
3 * Copyright (C) 2009,2010 Amit Gupta
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 * Amit Gupta <amit.gupta221 at gmail.com>
26 #include "utils_curl_stats.h"
27 #include "utils_llist.h"
29 #include <libxml/parser.h>
30 #include <libxml/tree.h>
31 #include <libxml/xpath.h>
32 #include <libxml/xpathInternals.h>
34 #include <curl/curl.h>
36 #define CX_DEFAULT_HOST "localhost"
39 * Private data structures
41 struct cx_values_s /* {{{ */
43 char path[DATA_MAX_NAME_LEN];
46 typedef struct cx_values_s cx_values_t;
49 struct cx_xpath_s /* {{{ */
55 char *instance_prefix;
57 char *plugin_instance_from;
61 typedef struct cx_xpath_s cx_xpath_t;
64 struct cx_namespace_s /* {{{ */
69 typedef struct cx_namespace_s cx_namespace_t;
88 struct curl_slist *headers;
91 cx_namespace_t *namespaces;
92 size_t namespaces_num;
95 char curl_errbuf[CURL_ERROR_SIZE];
100 llist_t *xpath_list; /* list of xpath blocks */
102 typedef struct cx_s cx_t; /* }}} */
107 static size_t cx_curl_callback(void *buf, /* {{{ */
108 size_t size, size_t nmemb, void *user_data) {
109 size_t len = size * nmemb;
111 cx_t *db = user_data;
113 ERROR("curl_xml plugin: cx_curl_callback: "
114 "user_data pointer is NULL.");
121 if ((db->buffer_fill + len) >= db->buffer_size) {
122 char *temp = realloc(db->buffer, db->buffer_fill + len + 1);
124 ERROR("curl_xml plugin: realloc failed.");
128 db->buffer_size = db->buffer_fill + len + 1;
131 memcpy(db->buffer + db->buffer_fill, (char *)buf, len);
132 db->buffer_fill += len;
133 db->buffer[db->buffer_fill] = 0;
136 } /* }}} size_t cx_curl_callback */
138 static void cx_xpath_free(cx_xpath_t *xpath) /* {{{ */
145 sfree(xpath->instance_prefix);
146 sfree(xpath->plugin_instance_from);
147 sfree(xpath->instance);
148 sfree(xpath->values);
150 } /* }}} void cx_xpath_free */
152 static void cx_xpath_list_free(llist_t *list) /* {{{ */
156 le = llist_head(list);
158 llentry_t *le_next = le->next;
160 /* this also frees xpath->path used for le->key */
161 cx_xpath_free(le->value);
167 } /* }}} void cx_xpath_list_free */
169 static void cx_free(void *arg) /* {{{ */
173 DEBUG("curl_xml plugin: cx_free (arg = %p);", arg);
180 if (db->curl != NULL)
181 curl_easy_cleanup(db->curl);
184 if (db->xpath_list != NULL)
185 cx_xpath_list_free(db->xpath_list);
189 sfree(db->plugin_name);
195 sfree(db->credentials);
197 sfree(db->post_body);
198 curl_slist_free_all(db->headers);
199 curl_stats_destroy(db->stats);
201 for (size_t i = 0; i < db->namespaces_num; i++) {
202 sfree(db->namespaces[i].prefix);
203 sfree(db->namespaces[i].url);
205 sfree(db->namespaces);
208 } /* }}} void cx_free */
210 static const char *cx_host(const cx_t *db) /* {{{ */
212 if (db->host == NULL)
217 static int cx_config_append_string(const char *name,
218 struct curl_slist **dest, /* {{{ */
219 oconfig_item_t *ci) {
220 struct curl_slist *temp = NULL;
221 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING)) {
222 WARNING("curl_xml plugin: `%s' needs exactly one string argument.", name);
226 temp = curl_slist_append(*dest, ci->values[0].value.string);
233 } /* }}} int cx_config_append_string */
235 static int cx_check_type(const data_set_t *ds, cx_xpath_t *xpath) /* {{{ */
238 WARNING("curl_xml plugin: DataSet `%s' not defined.", xpath->type);
242 if (ds->ds_num != xpath->values_len) {
243 WARNING("curl_xml plugin: DataSet `%s' requires %zu values, but config "
245 xpath->type, ds->ds_num, xpath->values_len);
250 } /* }}} cx_check_type */
252 static xmlXPathObjectPtr cx_evaluate_xpath(xmlXPathContextPtr xpath_ctx,
253 char *expr) /* {{{ */
255 xmlXPathObjectPtr xpath_obj =
256 xmlXPathEvalExpression(BAD_CAST expr, xpath_ctx);
257 if (xpath_obj == NULL) {
258 WARNING("curl_xml plugin: "
259 "Error unable to evaluate xpath expression \"%s\". Skipping...",
265 } /* }}} cx_evaluate_xpath */
267 static int cx_if_not_text_node(xmlNodePtr node) /* {{{ */
269 if (node->type == XML_TEXT_NODE || node->type == XML_ATTRIBUTE_NODE ||
270 node->type == XML_ELEMENT_NODE)
273 WARNING("curl_xml plugin: "
274 "Node \"%s\" doesn't seem to be a text node. Skipping...",
277 } /* }}} cx_if_not_text_node */
279 static char *cx_get_text_node_value(xmlXPathContextPtr xpath_ctx, /* {{{ */
280 char *expr, const char *from_option) {
281 xmlXPathObjectPtr values_node_obj = cx_evaluate_xpath(xpath_ctx, expr);
282 if (values_node_obj == NULL)
283 return NULL; /* Error already logged. */
285 xmlNodeSetPtr values_node = values_node_obj->nodesetval;
286 size_t tmp_size = (values_node) ? values_node->nodeNr : 0;
289 WARNING("curl_xml plugin: "
290 "relative xpath expression \"%s\" from '%s' doesn't match "
293 xmlXPathFreeObject(values_node_obj);
298 WARNING("curl_xml plugin: "
299 "relative xpath expression \"%s\" from '%s' is expected to return "
300 "only one text node. Skipping the node.",
302 xmlXPathFreeObject(values_node_obj);
306 /* ignoring the element if other than textnode/attribute*/
307 if (cx_if_not_text_node(values_node->nodeTab[0])) {
308 WARNING("curl_xml plugin: "
309 "relative xpath expression \"%s\" from '%s' is expected to return "
310 "only text/attribute node which is not the case. "
311 "Skipping the node.",
313 xmlXPathFreeObject(values_node_obj);
317 char *node_value = (char *)xmlNodeGetContent(values_node->nodeTab[0]);
320 xmlXPathFreeObject(values_node_obj);
323 } /* }}} char * cx_get_text_node_value */
325 static int cx_handle_single_value_xpath(xmlXPathContextPtr xpath_ctx, /* {{{ */
326 cx_xpath_t *xpath, const data_set_t *ds,
327 value_list_t *vl, int index) {
329 char *node_value = cx_get_text_node_value(
330 xpath_ctx, xpath->values[index].path, "ValuesFrom");
332 if (node_value == NULL)
335 switch (ds->ds[index].type) {
336 case DS_TYPE_COUNTER:
337 vl->values[index].counter =
338 (counter_t)strtoull(node_value,
339 /* endptr = */ NULL, /* base = */ 0);
342 vl->values[index].derive =
343 (derive_t)strtoll(node_value,
344 /* endptr = */ NULL, /* base = */ 0);
346 case DS_TYPE_ABSOLUTE:
347 vl->values[index].absolute =
348 (absolute_t)strtoull(node_value,
349 /* endptr = */ NULL, /* base = */ 0);
352 vl->values[index].gauge = (gauge_t)strtod(node_value,
353 /* endptr = */ NULL);
358 /* We have reached here which means that
359 * we have got something to work */
361 } /* }}} int cx_handle_single_value_xpath */
363 static int cx_handle_all_value_xpaths(xmlXPathContextPtr xpath_ctx, /* {{{ */
364 cx_xpath_t *xpath, const data_set_t *ds,
366 value_t values[xpath->values_len];
368 assert(xpath->values_len > 0);
369 assert(xpath->values_len == vl->values_len);
370 assert(xpath->values_len == ds->ds_num);
373 for (size_t i = 0; i < xpath->values_len; i++) {
374 if (cx_handle_single_value_xpath(xpath_ctx, xpath, ds, vl, i) != 0)
375 return -1; /* An error has been printed. */
376 } /* for (i = 0; i < xpath->values_len; i++) */
378 plugin_dispatch_values(vl);
382 } /* }}} int cx_handle_all_value_xpaths */
384 static int cx_handle_instance_xpath(xmlXPathContextPtr xpath_ctx, /* {{{ */
385 cx_xpath_t *xpath, value_list_t *vl) {
387 /* Handle type instance */
388 if (xpath->instance != NULL) {
390 cx_get_text_node_value(xpath_ctx, xpath->instance, "InstanceFrom");
391 if (node_value == NULL)
394 if (xpath->instance_prefix != NULL)
395 snprintf(vl->type_instance, sizeof(vl->type_instance), "%s%s",
396 xpath->instance_prefix, node_value);
398 sstrncpy(vl->type_instance, node_value, sizeof(vl->type_instance));
401 } else if (xpath->instance_prefix != NULL)
402 sstrncpy(vl->type_instance, xpath->instance_prefix,
403 sizeof(vl->type_instance));
405 /* Handle plugin instance */
406 if (xpath->plugin_instance_from != NULL) {
407 char *node_value = cx_get_text_node_value(
408 xpath_ctx, xpath->plugin_instance_from, "PluginInstanceFrom");
410 if (node_value == NULL)
413 sstrncpy(vl->plugin_instance, node_value, sizeof(vl->plugin_instance));
418 } /* }}} int cx_handle_instance_xpath */
420 static int cx_handle_xpath(const cx_t *db, /* {{{ */
421 xmlXPathContextPtr xpath_ctx, cx_xpath_t *xpath) {
423 const data_set_t *ds = plugin_get_ds(xpath->type);
424 if (cx_check_type(ds, xpath) != 0)
427 xmlXPathObjectPtr base_node_obj = cx_evaluate_xpath(xpath_ctx, xpath->path);
428 if (base_node_obj == NULL)
429 return -1; /* error is logged already */
431 xmlNodeSetPtr base_nodes = base_node_obj->nodesetval;
432 int total_nodes = (base_nodes) ? base_nodes->nodeNr : 0;
434 if (total_nodes == 0) {
435 ERROR("curl_xml plugin: "
436 "xpath expression \"%s\" doesn't match any of the nodes. "
437 "Skipping the xpath block...",
439 xmlXPathFreeObject(base_node_obj);
443 /* If base_xpath returned multiple results, then */
444 /* InstanceFrom or PluginInstanceFrom in the xpath block is required */
445 if (total_nodes > 1 && xpath->instance == NULL &&
446 xpath->plugin_instance_from == NULL) {
447 ERROR("curl_xml plugin: "
448 "InstanceFrom or PluginInstanceFrom is must in xpath block "
449 "since the base xpath expression \"%s\" "
450 "returned multiple results. Skipping the xpath block...",
452 xmlXPathFreeObject(base_node_obj);
456 value_list_t vl = VALUE_LIST_INIT;
458 /* set the values for the value_list */
459 vl.values_len = ds->ds_num;
460 sstrncpy(vl.type, xpath->type, sizeof(vl.type));
461 sstrncpy(vl.plugin, (db->plugin_name != NULL) ? db->plugin_name : "curl_xml",
463 sstrncpy(vl.host, cx_host(db), sizeof(vl.host));
465 for (int i = 0; i < total_nodes; i++) {
466 xpath_ctx->node = base_nodes->nodeTab[i];
468 if (db->instance != NULL)
469 sstrncpy(vl.plugin_instance, db->instance, sizeof(vl.plugin_instance));
471 if (cx_handle_instance_xpath(xpath_ctx, xpath, &vl) != 0)
472 continue; /* An error has already been reported. */
474 if (cx_handle_all_value_xpaths(xpath_ctx, xpath, ds, &vl) != 0)
475 continue; /* An error has been logged. */
476 } /* for (i = 0; i < total_nodes; i++) */
478 /* free up the allocated memory */
479 xmlXPathFreeObject(base_node_obj);
482 } /* }}} cx_handle_xpath */
484 static int cx_handle_parsed_xml(cx_t *db, xmlDocPtr doc, /* {{{ */
485 xmlXPathContextPtr xpath_ctx) {
488 llentry_t *le = llist_head(db->xpath_list);
490 cx_xpath_t *xpath = (cx_xpath_t *)le->value;
492 if (cx_handle_xpath(db, xpath_ctx, xpath) == 0)
493 status = 0; /* we got atleast one success */
496 } /* while (le != NULL) */
499 } /* }}} cx_handle_parsed_xml */
501 static int cx_parse_xml(cx_t *db, char *xml) /* {{{ */
504 xmlDocPtr doc = xmlParseDoc(BAD_CAST xml);
506 ERROR("curl_xml plugin: Failed to parse the xml document - %s", xml);
510 xmlXPathContextPtr xpath_ctx = xmlXPathNewContext(doc);
511 if (xpath_ctx == NULL) {
512 ERROR("curl_xml plugin: Failed to create the xml context");
517 for (size_t i = 0; i < db->namespaces_num; i++) {
518 cx_namespace_t const *ns = db->namespaces + i;
520 xmlXPathRegisterNs(xpath_ctx, BAD_CAST ns->prefix, BAD_CAST ns->url);
522 ERROR("curl_xml plugin: "
523 "unable to register NS with prefix=\"%s\" and href=\"%s\"\n",
524 ns->prefix, ns->url);
525 xmlXPathFreeContext(xpath_ctx);
531 int status = cx_handle_parsed_xml(db, doc, xpath_ctx);
533 xmlXPathFreeContext(xpath_ctx);
536 } /* }}} cx_parse_xml */
538 static int cx_read(user_data_t *ud) /* {{{ */
540 if ((ud == NULL) || (ud->data == NULL)) {
541 ERROR("curl_xml plugin: cx_read: Invalid user data.");
547 cx_t *db = (cx_t *)ud->data;
551 curl_easy_setopt(db->curl, CURLOPT_URL, db->url);
553 int status = curl_easy_perform(db->curl);
554 if (status != CURLE_OK) {
555 ERROR("curl_xml plugin: curl_easy_perform failed with status %i: %s (%s)",
556 status, db->curl_errbuf, db->url);
559 if (db->stats != NULL)
560 curl_stats_dispatch(db->stats, db->curl, cx_host(db), "curl_xml",
563 curl_easy_getinfo(db->curl, CURLINFO_EFFECTIVE_URL, &url);
564 curl_easy_getinfo(db->curl, CURLINFO_RESPONSE_CODE, &rc);
566 /* The response code is zero if a non-HTTP transport was used. */
567 if ((rc != 0) && (rc != 200)) {
569 "curl_xml plugin: curl_easy_perform failed with response code %ld (%s)",
574 status = cx_parse_xml(db, db->buffer);
578 } /* }}} int cx_read */
580 /* Configuration handling functions {{{ */
582 static int cx_config_add_values(const char *name, cx_xpath_t *xpath, /* {{{ */
583 oconfig_item_t *ci) {
584 if (ci->values_num < 1) {
585 WARNING("curl_xml plugin: `ValuesFrom' needs at least one argument.");
589 for (int i = 0; i < ci->values_num; i++)
590 if (ci->values[i].type != OCONFIG_TYPE_STRING) {
591 WARNING("curl_xml plugin: `ValuesFrom' needs only string argument.");
595 sfree(xpath->values);
597 xpath->values_len = 0;
598 xpath->values = malloc(sizeof(cx_values_t) * ci->values_num);
599 if (xpath->values == NULL)
601 xpath->values_len = (size_t)ci->values_num;
603 /* populate cx_values_t structure */
604 for (int i = 0; i < ci->values_num; i++) {
605 xpath->values[i].path_len = sizeof(ci->values[i].value.string);
606 sstrncpy(xpath->values[i].path, ci->values[i].value.string,
607 sizeof(xpath->values[i].path));
611 } /* }}} cx_config_add_values */
613 static int cx_config_add_xpath(cx_t *db, oconfig_item_t *ci) /* {{{ */
615 cx_xpath_t *xpath = calloc(1, sizeof(*xpath));
617 ERROR("curl_xml plugin: calloc failed.");
621 int status = cf_util_get_string(ci, &xpath->path);
623 cx_xpath_free(xpath);
627 /* error out if xpath->path is an empty string */
628 if (strlen(xpath->path) == 0) {
629 ERROR("curl_xml plugin: invalid xpath. "
630 "xpath value can't be an empty string");
631 cx_xpath_free(xpath);
636 for (int i = 0; i < ci->children_num; i++) {
637 oconfig_item_t *child = ci->children + i;
639 if (strcasecmp("Type", child->key) == 0)
640 status = cf_util_get_string(child, &xpath->type);
641 else if (strcasecmp("InstancePrefix", child->key) == 0)
642 status = cf_util_get_string(child, &xpath->instance_prefix);
643 else if (strcasecmp("InstanceFrom", child->key) == 0)
644 status = cf_util_get_string(child, &xpath->instance);
645 else if (strcasecmp("PluginInstanceFrom", child->key) == 0)
646 status = cf_util_get_string(child, &xpath->plugin_instance_from);
647 else if (strcasecmp("ValuesFrom", child->key) == 0)
648 status = cx_config_add_values("ValuesFrom", xpath, child);
650 WARNING("curl_xml plugin: Option `%s' not allowed here.", child->key);
656 } /* for (i = 0; i < ci->children_num; i++) */
659 cx_xpath_free(xpath);
663 if (xpath->type == NULL) {
664 WARNING("curl_xml plugin: `Type' missing in `xpath' block.");
665 cx_xpath_free(xpath);
669 if (xpath->values_len == 0) {
670 WARNING("curl_xml plugin: `ValuesFrom' missing in `xpath' block.");
671 cx_xpath_free(xpath);
675 llentry_t *le = llentry_create(xpath->path, xpath);
677 ERROR("curl_xml plugin: llentry_create failed.");
678 cx_xpath_free(xpath);
682 llist_append(db->xpath_list, le);
684 } /* }}} int cx_config_add_xpath */
686 static int cx_config_add_namespace(cx_t *db, /* {{{ */
687 oconfig_item_t *ci) {
689 if ((ci->values_num != 2) || (ci->values[0].type != OCONFIG_TYPE_STRING) ||
690 (ci->values[1].type != OCONFIG_TYPE_STRING)) {
691 WARNING("curl_xml plugin: The `Namespace' option "
692 "needs exactly two string arguments.");
696 cx_namespace_t *ns = realloc(
697 db->namespaces, sizeof(*db->namespaces) * (db->namespaces_num + 1));
699 ERROR("curl_xml plugin: realloc failed.");
703 ns = db->namespaces + db->namespaces_num;
704 memset(ns, 0, sizeof(*ns));
706 ns->prefix = strdup(ci->values[0].value.string);
707 ns->url = strdup(ci->values[1].value.string);
709 if ((ns->prefix == NULL) || (ns->url == NULL)) {
712 ERROR("curl_xml plugin: strdup failed.");
716 db->namespaces_num++;
718 } /* }}} int cx_config_add_namespace */
720 /* Initialize db->curl */
721 static int cx_init_curl(cx_t *db) /* {{{ */
723 db->curl = curl_easy_init();
724 if (db->curl == NULL) {
725 ERROR("curl_xml plugin: curl_easy_init failed.");
729 curl_easy_setopt(db->curl, CURLOPT_NOSIGNAL, 1L);
730 curl_easy_setopt(db->curl, CURLOPT_WRITEFUNCTION, cx_curl_callback);
731 curl_easy_setopt(db->curl, CURLOPT_WRITEDATA, db);
732 curl_easy_setopt(db->curl, CURLOPT_USERAGENT, COLLECTD_USERAGENT);
733 curl_easy_setopt(db->curl, CURLOPT_ERRORBUFFER, db->curl_errbuf);
734 curl_easy_setopt(db->curl, CURLOPT_FOLLOWLOCATION, 1L);
735 curl_easy_setopt(db->curl, CURLOPT_MAXREDIRS, 50L);
737 if (db->user != NULL) {
738 #ifdef HAVE_CURLOPT_USERNAME
739 curl_easy_setopt(db->curl, CURLOPT_USERNAME, db->user);
740 curl_easy_setopt(db->curl, CURLOPT_PASSWORD,
741 (db->pass == NULL) ? "" : db->pass);
743 size_t credentials_size;
745 credentials_size = strlen(db->user) + 2;
746 if (db->pass != NULL)
747 credentials_size += strlen(db->pass);
749 db->credentials = malloc(credentials_size);
750 if (db->credentials == NULL) {
751 ERROR("curl_xml plugin: malloc failed.");
755 snprintf(db->credentials, credentials_size, "%s:%s", db->user,
756 (db->pass == NULL) ? "" : db->pass);
757 curl_easy_setopt(db->curl, CURLOPT_USERPWD, db->credentials);
761 curl_easy_setopt(db->curl, CURLOPT_HTTPAUTH, CURLAUTH_DIGEST);
764 curl_easy_setopt(db->curl, CURLOPT_SSL_VERIFYPEER, db->verify_peer ? 1L : 0L);
765 curl_easy_setopt(db->curl, CURLOPT_SSL_VERIFYHOST, db->verify_host ? 2L : 0L);
766 if (db->cacert != NULL)
767 curl_easy_setopt(db->curl, CURLOPT_CAINFO, db->cacert);
768 if (db->headers != NULL)
769 curl_easy_setopt(db->curl, CURLOPT_HTTPHEADER, db->headers);
770 if (db->post_body != NULL)
771 curl_easy_setopt(db->curl, CURLOPT_POSTFIELDS, db->post_body);
773 #ifdef HAVE_CURLOPT_TIMEOUT_MS
774 if (db->timeout >= 0)
775 curl_easy_setopt(db->curl, CURLOPT_TIMEOUT_MS, (long)db->timeout);
777 curl_easy_setopt(db->curl, CURLOPT_TIMEOUT_MS,
778 (long)CDTIME_T_TO_MS(plugin_get_interval()));
782 } /* }}} int cx_init_curl */
784 static int cx_config_add_url(oconfig_item_t *ci) /* {{{ */
786 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING)) {
787 WARNING("curl_xml plugin: The `URL' block "
788 "needs exactly one string argument.");
792 cx_t *db = calloc(1, sizeof(*db));
794 ERROR("curl_xml plugin: calloc failed.");
798 db->instance = strdup("default");
799 if (db->instance == NULL) {
800 ERROR("curl_xml plugin: strdup failed.");
805 db->xpath_list = llist_create();
806 if (db->xpath_list == NULL) {
807 ERROR("curl_xml plugin: list creation failed.");
815 int status = cf_util_get_string(ci, &db->url);
817 llist_destroy(db->xpath_list);
823 /* Fill the `cx_t' structure.. */
824 for (int i = 0; i < ci->children_num; i++) {
825 oconfig_item_t *child = ci->children + i;
827 if (strcasecmp("Instance", child->key) == 0)
828 status = cf_util_get_string(child, &db->instance);
829 else if (strcasecmp("Plugin", child->key) == 0)
830 status = cf_util_get_string(child, &db->plugin_name);
831 else if (strcasecmp("Host", child->key) == 0)
832 status = cf_util_get_string(child, &db->host);
833 else if (strcasecmp("User", child->key) == 0)
834 status = cf_util_get_string(child, &db->user);
835 else if (strcasecmp("Password", child->key) == 0)
836 status = cf_util_get_string(child, &db->pass);
837 else if (strcasecmp("Digest", child->key) == 0)
838 status = cf_util_get_boolean(child, &db->digest);
839 else if (strcasecmp("VerifyPeer", child->key) == 0)
840 status = cf_util_get_boolean(child, &db->verify_peer);
841 else if (strcasecmp("VerifyHost", child->key) == 0)
842 status = cf_util_get_boolean(child, &db->verify_host);
843 else if (strcasecmp("CACert", child->key) == 0)
844 status = cf_util_get_string(child, &db->cacert);
845 else if (strcasecmp("xpath", child->key) == 0)
846 status = cx_config_add_xpath(db, child);
847 else if (strcasecmp("Header", child->key) == 0)
848 status = cx_config_append_string("Header", &db->headers, child);
849 else if (strcasecmp("Post", child->key) == 0)
850 status = cf_util_get_string(child, &db->post_body);
851 else if (strcasecmp("Namespace", child->key) == 0)
852 status = cx_config_add_namespace(db, child);
853 else if (strcasecmp("Timeout", child->key) == 0)
854 status = cf_util_get_int(child, &db->timeout);
855 else if (strcasecmp("Statistics", child->key) == 0) {
856 db->stats = curl_stats_from_config(child);
857 if (db->stats == NULL)
860 WARNING("curl_xml plugin: Option `%s' not allowed here.", child->key);
873 if (llist_size(db->xpath_list) == 0) {
874 WARNING("curl_xml plugin: No `xpath' block within `URL' block `%s'.",
880 if (cx_init_curl(db) != 0) {
885 /* If all went well, register this database for reading */
886 DEBUG("curl_xml plugin: Registering new read callback: %s", db->instance);
888 char *cb_name = ssnprintf_alloc("curl_xml-%s-%s", db->instance, db->url);
890 plugin_register_complex_read(/* group = */ "curl_xml", cb_name, cx_read,
893 .data = db, .free_func = cx_free,
897 } /* }}} int cx_config_add_url */
899 /* }}} End of configuration handling functions */
901 static int cx_config(oconfig_item_t *ci) /* {{{ */
906 for (int i = 0; i < ci->children_num; i++) {
907 oconfig_item_t *child = ci->children + i;
909 if (strcasecmp("URL", child->key) == 0) {
910 if (cx_config_add_url(child) == 0)
915 WARNING("curl_xml plugin: Option `%s' not allowed here.", child->key);
920 if ((success == 0) && (errors > 0)) {
921 ERROR("curl_xml plugin: All statements failed.");
926 } /* }}} int cx_config */
928 static int cx_init(void) /* {{{ */
930 /* Call this while collectd is still single-threaded to avoid
931 * initialization issues in libgcrypt. */
932 curl_global_init(CURL_GLOBAL_SSL);
934 } /* }}} int cx_init */
936 void module_register(void) {
937 plugin_register_complex_config("curl_xml", cx_config);
938 plugin_register_init("curl_xml", cx_init);
939 } /* void module_register */