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 %" PRIsz
244 " values, but config talks about %" PRIsz,
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 */
280 * Returned value should be freed with xmlFree().
282 static char *cx_get_text_node_value(xmlXPathContextPtr xpath_ctx, /* {{{ */
283 char *expr, const char *from_option) {
284 xmlXPathObjectPtr values_node_obj = cx_evaluate_xpath(xpath_ctx, expr);
285 if (values_node_obj == NULL)
286 return NULL; /* Error already logged. */
288 xmlNodeSetPtr values_node = values_node_obj->nodesetval;
289 size_t tmp_size = (values_node) ? values_node->nodeNr : 0;
292 WARNING("curl_xml plugin: "
293 "relative xpath expression \"%s\" from '%s' doesn't match "
296 xmlXPathFreeObject(values_node_obj);
301 WARNING("curl_xml plugin: "
302 "relative xpath expression \"%s\" from '%s' is expected to return "
303 "only one text node. Skipping the node.",
305 xmlXPathFreeObject(values_node_obj);
309 /* ignoring the element if other than textnode/attribute*/
310 if (cx_if_not_text_node(values_node->nodeTab[0])) {
311 WARNING("curl_xml plugin: "
312 "relative xpath expression \"%s\" from '%s' is expected to return "
313 "only text/attribute node which is not the case. "
314 "Skipping the node.",
316 xmlXPathFreeObject(values_node_obj);
320 char *node_value = (char *)xmlNodeGetContent(values_node->nodeTab[0]);
323 xmlXPathFreeObject(values_node_obj);
326 } /* }}} char * cx_get_text_node_value */
328 static int cx_handle_single_value_xpath(xmlXPathContextPtr xpath_ctx, /* {{{ */
329 cx_xpath_t *xpath, const data_set_t *ds,
330 value_list_t *vl, int index) {
332 char *node_value = cx_get_text_node_value(
333 xpath_ctx, xpath->values[index].path, "ValuesFrom");
335 if (node_value == NULL)
338 switch (ds->ds[index].type) {
339 case DS_TYPE_COUNTER:
340 vl->values[index].counter =
341 (counter_t)strtoull(node_value,
342 /* endptr = */ NULL, /* base = */ 0);
345 vl->values[index].derive =
346 (derive_t)strtoll(node_value,
347 /* endptr = */ NULL, /* base = */ 0);
349 case DS_TYPE_ABSOLUTE:
350 vl->values[index].absolute =
351 (absolute_t)strtoull(node_value,
352 /* endptr = */ NULL, /* base = */ 0);
355 vl->values[index].gauge = (gauge_t)strtod(node_value,
356 /* endptr = */ NULL);
361 /* We have reached here which means that
362 * we have got something to work */
364 } /* }}} int cx_handle_single_value_xpath */
366 static int cx_handle_all_value_xpaths(xmlXPathContextPtr xpath_ctx, /* {{{ */
367 cx_xpath_t *xpath, const data_set_t *ds,
369 value_t values[xpath->values_len];
371 assert(xpath->values_len > 0);
372 assert(xpath->values_len == vl->values_len);
373 assert(xpath->values_len == ds->ds_num);
376 for (size_t i = 0; i < xpath->values_len; i++) {
377 if (cx_handle_single_value_xpath(xpath_ctx, xpath, ds, vl, i) != 0)
378 return -1; /* An error has been printed. */
379 } /* for (i = 0; i < xpath->values_len; i++) */
381 plugin_dispatch_values(vl);
385 } /* }}} int cx_handle_all_value_xpaths */
387 static int cx_handle_instance_xpath(xmlXPathContextPtr xpath_ctx, /* {{{ */
388 cx_xpath_t *xpath, value_list_t *vl) {
390 /* Handle type instance */
391 if (xpath->instance != NULL) {
393 cx_get_text_node_value(xpath_ctx, xpath->instance, "InstanceFrom");
394 if (node_value == NULL)
397 if (xpath->instance_prefix != NULL)
398 snprintf(vl->type_instance, sizeof(vl->type_instance), "%s%s",
399 xpath->instance_prefix, node_value);
401 sstrncpy(vl->type_instance, node_value, sizeof(vl->type_instance));
404 } else if (xpath->instance_prefix != NULL)
405 sstrncpy(vl->type_instance, xpath->instance_prefix,
406 sizeof(vl->type_instance));
408 /* Handle plugin instance */
409 if (xpath->plugin_instance_from != NULL) {
410 char *node_value = cx_get_text_node_value(
411 xpath_ctx, xpath->plugin_instance_from, "PluginInstanceFrom");
413 if (node_value == NULL)
416 sstrncpy(vl->plugin_instance, node_value, sizeof(vl->plugin_instance));
421 } /* }}} int cx_handle_instance_xpath */
423 static int cx_handle_xpath(const cx_t *db, /* {{{ */
424 xmlXPathContextPtr xpath_ctx, cx_xpath_t *xpath) {
426 const data_set_t *ds = plugin_get_ds(xpath->type);
427 if (cx_check_type(ds, xpath) != 0)
430 xmlXPathObjectPtr base_node_obj = cx_evaluate_xpath(xpath_ctx, xpath->path);
431 if (base_node_obj == NULL)
432 return -1; /* error is logged already */
434 xmlNodeSetPtr base_nodes = base_node_obj->nodesetval;
435 int total_nodes = (base_nodes) ? base_nodes->nodeNr : 0;
437 if (total_nodes == 0) {
438 ERROR("curl_xml plugin: "
439 "xpath expression \"%s\" doesn't match any of the nodes. "
440 "Skipping the xpath block...",
442 xmlXPathFreeObject(base_node_obj);
446 /* If base_xpath returned multiple results, then */
447 /* InstanceFrom or PluginInstanceFrom in the xpath block is required */
448 if (total_nodes > 1 && xpath->instance == NULL &&
449 xpath->plugin_instance_from == NULL) {
450 ERROR("curl_xml plugin: "
451 "InstanceFrom or PluginInstanceFrom is must in xpath block "
452 "since the base xpath expression \"%s\" "
453 "returned multiple results. Skipping the xpath block...",
455 xmlXPathFreeObject(base_node_obj);
459 value_list_t vl = VALUE_LIST_INIT;
461 /* set the values for the value_list */
462 vl.values_len = ds->ds_num;
463 sstrncpy(vl.type, xpath->type, sizeof(vl.type));
464 sstrncpy(vl.plugin, (db->plugin_name != NULL) ? db->plugin_name : "curl_xml",
466 sstrncpy(vl.host, cx_host(db), sizeof(vl.host));
468 for (int i = 0; i < total_nodes; i++) {
469 xpath_ctx->node = base_nodes->nodeTab[i];
471 if (db->instance != NULL)
472 sstrncpy(vl.plugin_instance, db->instance, sizeof(vl.plugin_instance));
474 if (cx_handle_instance_xpath(xpath_ctx, xpath, &vl) != 0)
475 continue; /* An error has already been reported. */
477 if (cx_handle_all_value_xpaths(xpath_ctx, xpath, ds, &vl) != 0)
478 continue; /* An error has been logged. */
479 } /* for (i = 0; i < total_nodes; i++) */
481 /* free up the allocated memory */
482 xmlXPathFreeObject(base_node_obj);
485 } /* }}} cx_handle_xpath */
487 static int cx_handle_parsed_xml(cx_t *db, xmlDocPtr doc, /* {{{ */
488 xmlXPathContextPtr xpath_ctx) {
491 llentry_t *le = llist_head(db->xpath_list);
493 cx_xpath_t *xpath = (cx_xpath_t *)le->value;
495 if (cx_handle_xpath(db, xpath_ctx, xpath) == 0)
496 status = 0; /* we got atleast one success */
499 } /* while (le != NULL) */
502 } /* }}} cx_handle_parsed_xml */
504 static int cx_parse_xml(cx_t *db, char *xml) /* {{{ */
507 xmlDocPtr doc = xmlParseDoc(BAD_CAST xml);
509 ERROR("curl_xml plugin: Failed to parse the xml document - %s", xml);
513 xmlXPathContextPtr xpath_ctx = xmlXPathNewContext(doc);
514 if (xpath_ctx == NULL) {
515 ERROR("curl_xml plugin: Failed to create the xml context");
520 for (size_t i = 0; i < db->namespaces_num; i++) {
521 cx_namespace_t const *ns = db->namespaces + i;
523 xmlXPathRegisterNs(xpath_ctx, BAD_CAST ns->prefix, BAD_CAST ns->url);
525 ERROR("curl_xml plugin: "
526 "unable to register NS with prefix=\"%s\" and href=\"%s\"\n",
527 ns->prefix, ns->url);
528 xmlXPathFreeContext(xpath_ctx);
534 int status = cx_handle_parsed_xml(db, doc, xpath_ctx);
536 xmlXPathFreeContext(xpath_ctx);
539 } /* }}} cx_parse_xml */
541 static int cx_read(user_data_t *ud) /* {{{ */
543 if ((ud == NULL) || (ud->data == NULL)) {
544 ERROR("curl_xml plugin: cx_read: Invalid user data.");
550 cx_t *db = (cx_t *)ud->data;
554 curl_easy_setopt(db->curl, CURLOPT_URL, db->url);
556 int status = curl_easy_perform(db->curl);
557 if (status != CURLE_OK) {
558 ERROR("curl_xml plugin: curl_easy_perform failed with status %i: %s (%s)",
559 status, db->curl_errbuf, db->url);
562 if (db->stats != NULL)
563 curl_stats_dispatch(db->stats, db->curl, cx_host(db), "curl_xml",
566 curl_easy_getinfo(db->curl, CURLINFO_EFFECTIVE_URL, &url);
567 curl_easy_getinfo(db->curl, CURLINFO_RESPONSE_CODE, &rc);
569 /* The response code is zero if a non-HTTP transport was used. */
570 if ((rc != 0) && (rc != 200)) {
572 "curl_xml plugin: curl_easy_perform failed with response code %ld (%s)",
577 status = cx_parse_xml(db, db->buffer);
581 } /* }}} int cx_read */
583 /* Configuration handling functions {{{ */
585 static int cx_config_add_values(const char *name, cx_xpath_t *xpath, /* {{{ */
586 oconfig_item_t *ci) {
587 if (ci->values_num < 1) {
588 WARNING("curl_xml plugin: `ValuesFrom' needs at least one argument.");
592 for (int i = 0; i < ci->values_num; i++)
593 if (ci->values[i].type != OCONFIG_TYPE_STRING) {
594 WARNING("curl_xml plugin: `ValuesFrom' needs only string argument.");
598 sfree(xpath->values);
600 xpath->values_len = 0;
601 xpath->values = malloc(sizeof(cx_values_t) * ci->values_num);
602 if (xpath->values == NULL)
604 xpath->values_len = (size_t)ci->values_num;
606 /* populate cx_values_t structure */
607 for (int i = 0; i < ci->values_num; i++) {
608 xpath->values[i].path_len = sizeof(ci->values[i].value.string);
609 sstrncpy(xpath->values[i].path, ci->values[i].value.string,
610 sizeof(xpath->values[i].path));
614 } /* }}} cx_config_add_values */
616 static int cx_config_add_xpath(cx_t *db, oconfig_item_t *ci) /* {{{ */
618 cx_xpath_t *xpath = calloc(1, sizeof(*xpath));
620 ERROR("curl_xml plugin: calloc failed.");
624 int status = cf_util_get_string(ci, &xpath->path);
626 cx_xpath_free(xpath);
630 /* error out if xpath->path is an empty string */
631 if (strlen(xpath->path) == 0) {
632 ERROR("curl_xml plugin: invalid xpath. "
633 "xpath value can't be an empty string");
634 cx_xpath_free(xpath);
639 for (int i = 0; i < ci->children_num; i++) {
640 oconfig_item_t *child = ci->children + i;
642 if (strcasecmp("Type", child->key) == 0)
643 status = cf_util_get_string(child, &xpath->type);
644 else if (strcasecmp("InstancePrefix", child->key) == 0)
645 status = cf_util_get_string(child, &xpath->instance_prefix);
646 else if (strcasecmp("InstanceFrom", child->key) == 0)
647 status = cf_util_get_string(child, &xpath->instance);
648 else if (strcasecmp("PluginInstanceFrom", child->key) == 0)
649 status = cf_util_get_string(child, &xpath->plugin_instance_from);
650 else if (strcasecmp("ValuesFrom", child->key) == 0)
651 status = cx_config_add_values("ValuesFrom", xpath, child);
653 WARNING("curl_xml plugin: Option `%s' not allowed here.", child->key);
659 } /* for (i = 0; i < ci->children_num; i++) */
662 cx_xpath_free(xpath);
666 if (xpath->type == NULL) {
667 WARNING("curl_xml plugin: `Type' missing in `xpath' block.");
668 cx_xpath_free(xpath);
672 if (xpath->values_len == 0) {
673 WARNING("curl_xml plugin: `ValuesFrom' missing in `xpath' block.");
674 cx_xpath_free(xpath);
678 llentry_t *le = llentry_create(xpath->path, xpath);
680 ERROR("curl_xml plugin: llentry_create failed.");
681 cx_xpath_free(xpath);
685 llist_append(db->xpath_list, le);
687 } /* }}} int cx_config_add_xpath */
689 static int cx_config_add_namespace(cx_t *db, /* {{{ */
690 oconfig_item_t *ci) {
692 if ((ci->values_num != 2) || (ci->values[0].type != OCONFIG_TYPE_STRING) ||
693 (ci->values[1].type != OCONFIG_TYPE_STRING)) {
694 WARNING("curl_xml plugin: The `Namespace' option "
695 "needs exactly two string arguments.");
699 cx_namespace_t *ns = realloc(
700 db->namespaces, sizeof(*db->namespaces) * (db->namespaces_num + 1));
702 ERROR("curl_xml plugin: realloc failed.");
706 ns = db->namespaces + db->namespaces_num;
707 memset(ns, 0, sizeof(*ns));
709 ns->prefix = strdup(ci->values[0].value.string);
710 ns->url = strdup(ci->values[1].value.string);
712 if ((ns->prefix == NULL) || (ns->url == NULL)) {
715 ERROR("curl_xml plugin: strdup failed.");
719 db->namespaces_num++;
721 } /* }}} int cx_config_add_namespace */
723 /* Initialize db->curl */
724 static int cx_init_curl(cx_t *db) /* {{{ */
726 db->curl = curl_easy_init();
727 if (db->curl == NULL) {
728 ERROR("curl_xml plugin: curl_easy_init failed.");
732 curl_easy_setopt(db->curl, CURLOPT_NOSIGNAL, 1L);
733 curl_easy_setopt(db->curl, CURLOPT_WRITEFUNCTION, cx_curl_callback);
734 curl_easy_setopt(db->curl, CURLOPT_WRITEDATA, db);
735 curl_easy_setopt(db->curl, CURLOPT_USERAGENT, COLLECTD_USERAGENT);
736 curl_easy_setopt(db->curl, CURLOPT_ERRORBUFFER, db->curl_errbuf);
737 curl_easy_setopt(db->curl, CURLOPT_FOLLOWLOCATION, 1L);
738 curl_easy_setopt(db->curl, CURLOPT_MAXREDIRS, 50L);
740 if (db->user != NULL) {
741 #ifdef HAVE_CURLOPT_USERNAME
742 curl_easy_setopt(db->curl, CURLOPT_USERNAME, db->user);
743 curl_easy_setopt(db->curl, CURLOPT_PASSWORD,
744 (db->pass == NULL) ? "" : db->pass);
746 size_t credentials_size;
748 credentials_size = strlen(db->user) + 2;
749 if (db->pass != NULL)
750 credentials_size += strlen(db->pass);
752 db->credentials = malloc(credentials_size);
753 if (db->credentials == NULL) {
754 ERROR("curl_xml plugin: malloc failed.");
758 snprintf(db->credentials, credentials_size, "%s:%s", db->user,
759 (db->pass == NULL) ? "" : db->pass);
760 curl_easy_setopt(db->curl, CURLOPT_USERPWD, db->credentials);
764 curl_easy_setopt(db->curl, CURLOPT_HTTPAUTH, CURLAUTH_DIGEST);
767 curl_easy_setopt(db->curl, CURLOPT_SSL_VERIFYPEER, db->verify_peer ? 1L : 0L);
768 curl_easy_setopt(db->curl, CURLOPT_SSL_VERIFYHOST, db->verify_host ? 2L : 0L);
769 if (db->cacert != NULL)
770 curl_easy_setopt(db->curl, CURLOPT_CAINFO, db->cacert);
771 if (db->headers != NULL)
772 curl_easy_setopt(db->curl, CURLOPT_HTTPHEADER, db->headers);
773 if (db->post_body != NULL)
774 curl_easy_setopt(db->curl, CURLOPT_POSTFIELDS, db->post_body);
776 #ifdef HAVE_CURLOPT_TIMEOUT_MS
777 if (db->timeout >= 0)
778 curl_easy_setopt(db->curl, CURLOPT_TIMEOUT_MS, (long)db->timeout);
780 curl_easy_setopt(db->curl, CURLOPT_TIMEOUT_MS,
781 (long)CDTIME_T_TO_MS(plugin_get_interval()));
785 } /* }}} int cx_init_curl */
787 static int cx_config_add_url(oconfig_item_t *ci) /* {{{ */
789 if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING)) {
790 WARNING("curl_xml plugin: The `URL' block "
791 "needs exactly one string argument.");
795 cx_t *db = calloc(1, sizeof(*db));
797 ERROR("curl_xml plugin: calloc failed.");
801 db->instance = strdup("default");
802 if (db->instance == NULL) {
803 ERROR("curl_xml plugin: strdup failed.");
808 db->xpath_list = llist_create();
809 if (db->xpath_list == NULL) {
810 ERROR("curl_xml plugin: list creation failed.");
818 int status = cf_util_get_string(ci, &db->url);
820 llist_destroy(db->xpath_list);
826 /* Fill the `cx_t' structure.. */
827 for (int i = 0; i < ci->children_num; i++) {
828 oconfig_item_t *child = ci->children + i;
830 if (strcasecmp("Instance", child->key) == 0)
831 status = cf_util_get_string(child, &db->instance);
832 else if (strcasecmp("Plugin", child->key) == 0)
833 status = cf_util_get_string(child, &db->plugin_name);
834 else if (strcasecmp("Host", child->key) == 0)
835 status = cf_util_get_string(child, &db->host);
836 else if (strcasecmp("User", child->key) == 0)
837 status = cf_util_get_string(child, &db->user);
838 else if (strcasecmp("Password", child->key) == 0)
839 status = cf_util_get_string(child, &db->pass);
840 else if (strcasecmp("Digest", child->key) == 0)
841 status = cf_util_get_boolean(child, &db->digest);
842 else if (strcasecmp("VerifyPeer", child->key) == 0)
843 status = cf_util_get_boolean(child, &db->verify_peer);
844 else if (strcasecmp("VerifyHost", child->key) == 0)
845 status = cf_util_get_boolean(child, &db->verify_host);
846 else if (strcasecmp("CACert", child->key) == 0)
847 status = cf_util_get_string(child, &db->cacert);
848 else if (strcasecmp("xpath", child->key) == 0)
849 status = cx_config_add_xpath(db, child);
850 else if (strcasecmp("Header", child->key) == 0)
851 status = cx_config_append_string("Header", &db->headers, child);
852 else if (strcasecmp("Post", child->key) == 0)
853 status = cf_util_get_string(child, &db->post_body);
854 else if (strcasecmp("Namespace", child->key) == 0)
855 status = cx_config_add_namespace(db, child);
856 else if (strcasecmp("Timeout", child->key) == 0)
857 status = cf_util_get_int(child, &db->timeout);
858 else if (strcasecmp("Statistics", child->key) == 0) {
859 db->stats = curl_stats_from_config(child);
860 if (db->stats == NULL)
863 WARNING("curl_xml plugin: Option `%s' not allowed here.", child->key);
876 if (llist_size(db->xpath_list) == 0) {
877 WARNING("curl_xml plugin: No `xpath' block within `URL' block `%s'.",
883 if (cx_init_curl(db) != 0) {
888 /* If all went well, register this database for reading */
889 DEBUG("curl_xml plugin: Registering new read callback: %s", db->instance);
891 char *cb_name = ssnprintf_alloc("curl_xml-%s-%s", db->instance, db->url);
893 plugin_register_complex_read(/* group = */ "curl_xml", cb_name, cx_read,
896 .data = db, .free_func = cx_free,
900 } /* }}} int cx_config_add_url */
902 /* }}} End of configuration handling functions */
904 static int cx_config(oconfig_item_t *ci) /* {{{ */
909 for (int i = 0; i < ci->children_num; i++) {
910 oconfig_item_t *child = ci->children + i;
912 if (strcasecmp("URL", child->key) == 0) {
913 if (cx_config_add_url(child) == 0)
918 WARNING("curl_xml plugin: Option `%s' not allowed here.", child->key);
923 if ((success == 0) && (errors > 0)) {
924 ERROR("curl_xml plugin: All statements failed.");
929 } /* }}} int cx_config */
931 static int cx_init(void) /* {{{ */
933 /* Call this while collectd is still single-threaded to avoid
934 * initialization issues in libgcrypt. */
935 curl_global_init(CURL_GLOBAL_SSL);
937 } /* }}} int cx_init */
939 void module_register(void) {
940 plugin_register_complex_config("curl_xml", cx_config);
941 plugin_register_init("curl_xml", cx_init);
942 } /* void module_register */