/** * collectd - src/curl_xml.c * Copyright (C) 2009,2010 Amit Gupta * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; only version 2 of the License is applicable. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * * Authors: * Amit Gupta **/ #include "collectd.h" #include "plugin.h" #include "utils/common/common.h" #include "utils/curl_stats/curl_stats.h" #include "utils_llist.h" #include #include #include #include #include #define CX_DEFAULT_HOST "localhost" /* * Private data structures */ struct cx_values_s /* {{{ */ { char path[DATA_MAX_NAME_LEN]; size_t path_len; }; typedef struct cx_values_s cx_values_t; /* }}} */ struct cx_xpath_s /* {{{ */ { char *path; char *type; cx_values_t *values; size_t values_len; char *instance_prefix; char *instance; char *plugin_instance_from; int is_table; unsigned long magic; }; typedef struct cx_xpath_s cx_xpath_t; /* }}} */ struct cx_namespace_s /* {{{ */ { char *prefix; char *url; }; typedef struct cx_namespace_s cx_namespace_t; /* }}} */ struct cx_s /* {{{ */ { char *instance; char *plugin_name; char *host; char *url; int address_family; char *user; char *pass; char *credentials; bool digest; bool verify_peer; bool verify_host; char *cacert; char *post_body; int timeout; struct curl_slist *headers; curl_stats_t *stats; cx_namespace_t *namespaces; size_t namespaces_num; CURL *curl; char curl_errbuf[CURL_ERROR_SIZE]; char *buffer; size_t buffer_size; size_t buffer_fill; llist_t *xpath_list; /* list of xpath blocks */ }; typedef struct cx_s cx_t; /* }}} */ /* * Private functions */ static size_t cx_curl_callback(void *buf, /* {{{ */ size_t size, size_t nmemb, void *user_data) { size_t len = size * nmemb; cx_t *db = user_data; if (db == NULL) { ERROR("curl_xml plugin: cx_curl_callback: " "user_data pointer is NULL."); return 0; } if (len == 0) return len; if ((db->buffer_fill + len) >= db->buffer_size) { char *temp = realloc(db->buffer, db->buffer_fill + len + 1); if (temp == NULL) { ERROR("curl_xml plugin: realloc failed."); return 0; } db->buffer = temp; db->buffer_size = db->buffer_fill + len + 1; } memcpy(db->buffer + db->buffer_fill, (char *)buf, len); db->buffer_fill += len; db->buffer[db->buffer_fill] = 0; return len; } /* }}} size_t cx_curl_callback */ static void cx_xpath_free(cx_xpath_t *xpath) /* {{{ */ { if (xpath == NULL) return; sfree(xpath->path); sfree(xpath->type); sfree(xpath->instance_prefix); sfree(xpath->plugin_instance_from); sfree(xpath->instance); sfree(xpath->values); sfree(xpath); } /* }}} void cx_xpath_free */ static void cx_xpath_list_free(llist_t *list) /* {{{ */ { llentry_t *le; le = llist_head(list); while (le != NULL) { llentry_t *le_next = le->next; /* this also frees xpath->path used for le->key */ cx_xpath_free(le->value); le = le_next; } llist_destroy(list); } /* }}} void cx_xpath_list_free */ static void cx_free(void *arg) /* {{{ */ { cx_t *db; DEBUG("curl_xml plugin: cx_free (arg = %p);", arg); db = (cx_t *)arg; if (db == NULL) return; if (db->curl != NULL) curl_easy_cleanup(db->curl); db->curl = NULL; if (db->xpath_list != NULL) cx_xpath_list_free(db->xpath_list); sfree(db->buffer); sfree(db->instance); sfree(db->plugin_name); sfree(db->host); sfree(db->url); sfree(db->user); sfree(db->pass); sfree(db->credentials); sfree(db->cacert); sfree(db->post_body); curl_slist_free_all(db->headers); curl_stats_destroy(db->stats); for (size_t i = 0; i < db->namespaces_num; i++) { sfree(db->namespaces[i].prefix); sfree(db->namespaces[i].url); } sfree(db->namespaces); sfree(db); } /* }}} void cx_free */ static const char *cx_host(const cx_t *db) /* {{{ */ { if (db->host == NULL) return hostname_g; return db->host; } /* }}} cx_host */ static int cx_config_append_string(const char *name, struct curl_slist **dest, /* {{{ */ oconfig_item_t *ci) { struct curl_slist *temp = NULL; if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING)) { WARNING("curl_xml plugin: `%s' needs exactly one string argument.", name); return -1; } temp = curl_slist_append(*dest, ci->values[0].value.string); if (temp == NULL) return -1; *dest = temp; return 0; } /* }}} int cx_config_append_string */ static int cx_check_type(const data_set_t *ds, cx_xpath_t *xpath) /* {{{ */ { if (!ds) { WARNING("curl_xml plugin: DataSet `%s' not defined.", xpath->type); return -1; } if (ds->ds_num != xpath->values_len) { WARNING("curl_xml plugin: DataSet `%s' requires %" PRIsz " values, but config talks about %" PRIsz, xpath->type, ds->ds_num, xpath->values_len); return -1; } return 0; } /* }}} cx_check_type */ static xmlXPathObjectPtr cx_evaluate_xpath(xmlXPathContextPtr xpath_ctx, char *expr) /* {{{ */ { xmlXPathObjectPtr xpath_obj = xmlXPathEvalExpression(BAD_CAST expr, xpath_ctx); if (xpath_obj == NULL) { WARNING("curl_xml plugin: " "Error unable to evaluate xpath expression \"%s\". Skipping...", expr); return NULL; } return xpath_obj; } /* }}} cx_evaluate_xpath */ static int cx_if_not_text_node(xmlNodePtr node) /* {{{ */ { if (node->type == XML_TEXT_NODE || node->type == XML_ATTRIBUTE_NODE || node->type == XML_ELEMENT_NODE) return 0; WARNING("curl_xml plugin: " "Node \"%s\" doesn't seem to be a text node. Skipping...", node->name); return -1; } /* }}} cx_if_not_text_node */ /* * Returned value should be freed with xmlFree(). */ static char *cx_get_text_node_value(xmlXPathContextPtr xpath_ctx, /* {{{ */ char *expr, const char *from_option) { xmlXPathObjectPtr values_node_obj = cx_evaluate_xpath(xpath_ctx, expr); if (values_node_obj == NULL) return NULL; /* Error already logged. */ xmlNodeSetPtr values_node = values_node_obj->nodesetval; size_t tmp_size = (values_node) ? values_node->nodeNr : 0; if (tmp_size == 0) { WARNING("curl_xml plugin: " "relative xpath expression \"%s\" from '%s' doesn't match " "any of the nodes.", expr, from_option); xmlXPathFreeObject(values_node_obj); return NULL; } if (tmp_size > 1) { WARNING("curl_xml plugin: " "relative xpath expression \"%s\" from '%s' is expected to return " "only one text node. Skipping the node.", expr, from_option); xmlXPathFreeObject(values_node_obj); return NULL; } /* ignoring the element if other than textnode/attribute*/ if (cx_if_not_text_node(values_node->nodeTab[0])) { WARNING("curl_xml plugin: " "relative xpath expression \"%s\" from '%s' is expected to return " "only text/attribute node which is not the case. " "Skipping the node.", expr, from_option); xmlXPathFreeObject(values_node_obj); return NULL; } char *node_value = (char *)xmlNodeGetContent(values_node->nodeTab[0]); /* free up object */ xmlXPathFreeObject(values_node_obj); return node_value; } /* }}} char * cx_get_text_node_value */ static int cx_handle_single_value_xpath(xmlXPathContextPtr xpath_ctx, /* {{{ */ cx_xpath_t *xpath, const data_set_t *ds, value_list_t *vl, int index) { char *node_value = cx_get_text_node_value( xpath_ctx, xpath->values[index].path, "ValuesFrom"); if (node_value == NULL) return -1; switch (ds->ds[index].type) { case DS_TYPE_COUNTER: vl->values[index].counter = (counter_t)strtoull(node_value, /* endptr = */ NULL, /* base = */ 0); break; case DS_TYPE_DERIVE: vl->values[index].derive = (derive_t)strtoll(node_value, /* endptr = */ NULL, /* base = */ 0); break; case DS_TYPE_ABSOLUTE: vl->values[index].absolute = (absolute_t)strtoull(node_value, /* endptr = */ NULL, /* base = */ 0); break; case DS_TYPE_GAUGE: vl->values[index].gauge = (gauge_t)strtod(node_value, /* endptr = */ NULL); } xmlFree(node_value); /* We have reached here which means that * we have got something to work */ return 0; } /* }}} int cx_handle_single_value_xpath */ static int cx_handle_all_value_xpaths(xmlXPathContextPtr xpath_ctx, /* {{{ */ cx_xpath_t *xpath, const data_set_t *ds, value_list_t *vl) { value_t values[xpath->values_len]; assert(xpath->values_len > 0); assert(xpath->values_len == vl->values_len); assert(xpath->values_len == ds->ds_num); vl->values = values; for (size_t i = 0; i < xpath->values_len; i++) { if (cx_handle_single_value_xpath(xpath_ctx, xpath, ds, vl, i) != 0) return -1; /* An error has been printed. */ } /* for (i = 0; i < xpath->values_len; i++) */ plugin_dispatch_values(vl); vl->values = NULL; return 0; } /* }}} int cx_handle_all_value_xpaths */ static int cx_handle_instance_xpath(xmlXPathContextPtr xpath_ctx, /* {{{ */ cx_xpath_t *xpath, value_list_t *vl) { /* Handle type instance */ if (xpath->instance != NULL) { char *node_value = cx_get_text_node_value(xpath_ctx, xpath->instance, "InstanceFrom"); if (node_value == NULL) return -1; if (xpath->instance_prefix != NULL) snprintf(vl->type_instance, sizeof(vl->type_instance), "%s%s", xpath->instance_prefix, node_value); else sstrncpy(vl->type_instance, node_value, sizeof(vl->type_instance)); xmlFree(node_value); } else if (xpath->instance_prefix != NULL) sstrncpy(vl->type_instance, xpath->instance_prefix, sizeof(vl->type_instance)); /* Handle plugin instance */ if (xpath->plugin_instance_from != NULL) { char *node_value = cx_get_text_node_value( xpath_ctx, xpath->plugin_instance_from, "PluginInstanceFrom"); if (node_value == NULL) return -1; sstrncpy(vl->plugin_instance, node_value, sizeof(vl->plugin_instance)); xmlFree(node_value); } return 0; } /* }}} int cx_handle_instance_xpath */ static int cx_handle_xpath(const cx_t *db, /* {{{ */ xmlXPathContextPtr xpath_ctx, cx_xpath_t *xpath) { const data_set_t *ds = plugin_get_ds(xpath->type); if (cx_check_type(ds, xpath) != 0) return -1; xmlXPathObjectPtr base_node_obj = cx_evaluate_xpath(xpath_ctx, xpath->path); if (base_node_obj == NULL) return -1; /* error is logged already */ xmlNodeSetPtr base_nodes = base_node_obj->nodesetval; int total_nodes = (base_nodes) ? base_nodes->nodeNr : 0; if (total_nodes == 0) { ERROR("curl_xml plugin: " "xpath expression \"%s\" doesn't match any of the nodes. " "Skipping the xpath block...", xpath->path); xmlXPathFreeObject(base_node_obj); return -1; } /* If base_xpath returned multiple results, then */ /* InstanceFrom or PluginInstanceFrom in the xpath block is required */ if (total_nodes > 1 && xpath->instance == NULL && xpath->plugin_instance_from == NULL) { ERROR("curl_xml plugin: " "InstanceFrom or PluginInstanceFrom is must in xpath block " "since the base xpath expression \"%s\" " "returned multiple results. Skipping the xpath block...", xpath->path); xmlXPathFreeObject(base_node_obj); return -1; } value_list_t vl = VALUE_LIST_INIT; /* set the values for the value_list */ vl.values_len = ds->ds_num; sstrncpy(vl.type, xpath->type, sizeof(vl.type)); sstrncpy(vl.plugin, (db->plugin_name != NULL) ? db->plugin_name : "curl_xml", sizeof(vl.plugin)); sstrncpy(vl.host, cx_host(db), sizeof(vl.host)); for (int i = 0; i < total_nodes; i++) { xpath_ctx->node = base_nodes->nodeTab[i]; if (db->instance != NULL) sstrncpy(vl.plugin_instance, db->instance, sizeof(vl.plugin_instance)); if (cx_handle_instance_xpath(xpath_ctx, xpath, &vl) != 0) continue; /* An error has already been reported. */ if (cx_handle_all_value_xpaths(xpath_ctx, xpath, ds, &vl) != 0) continue; /* An error has been logged. */ } /* for (i = 0; i < total_nodes; i++) */ /* free up the allocated memory */ xmlXPathFreeObject(base_node_obj); return 0; } /* }}} cx_handle_xpath */ static int cx_handle_parsed_xml(cx_t *db, xmlDocPtr doc, /* {{{ */ xmlXPathContextPtr xpath_ctx) { int status = -1; llentry_t *le = llist_head(db->xpath_list); while (le != NULL) { cx_xpath_t *xpath = (cx_xpath_t *)le->value; if (cx_handle_xpath(db, xpath_ctx, xpath) == 0) status = 0; /* we got atleast one success */ le = le->next; } /* while (le != NULL) */ return status; } /* }}} cx_handle_parsed_xml */ static int cx_parse_xml(cx_t *db, char *xml) /* {{{ */ { /* Load the XML */ xmlDocPtr doc = xmlParseDoc(BAD_CAST xml); if (doc == NULL) { ERROR("curl_xml plugin: Failed to parse the xml document - %s", xml); return -1; } xmlXPathContextPtr xpath_ctx = xmlXPathNewContext(doc); if (xpath_ctx == NULL) { ERROR("curl_xml plugin: Failed to create the xml context"); xmlFreeDoc(doc); return -1; } for (size_t i = 0; i < db->namespaces_num; i++) { cx_namespace_t const *ns = db->namespaces + i; int status = xmlXPathRegisterNs(xpath_ctx, BAD_CAST ns->prefix, BAD_CAST ns->url); if (status != 0) { ERROR("curl_xml plugin: " "unable to register NS with prefix=\"%s\" and href=\"%s\"\n", ns->prefix, ns->url); xmlXPathFreeContext(xpath_ctx); xmlFreeDoc(doc); return status; } } int status = cx_handle_parsed_xml(db, doc, xpath_ctx); /* Cleanup */ xmlXPathFreeContext(xpath_ctx); xmlFreeDoc(doc); return status; } /* }}} cx_parse_xml */ static int cx_read(user_data_t *ud) /* {{{ */ { if ((ud == NULL) || (ud->data == NULL)) { ERROR("curl_xml plugin: cx_read: Invalid user data."); return -1; } long rc; char *url; cx_t *db = (cx_t *)ud->data; db->buffer_fill = 0; curl_easy_setopt(db->curl, CURLOPT_URL, db->url); int status = curl_easy_perform(db->curl); if (status != CURLE_OK) { ERROR("curl_xml plugin: curl_easy_perform failed with status %i: %s (%s)", status, db->curl_errbuf, db->url); return -1; } if (db->stats != NULL) curl_stats_dispatch(db->stats, db->curl, cx_host(db), "curl_xml", db->instance); curl_easy_getinfo(db->curl, CURLINFO_EFFECTIVE_URL, &url); curl_easy_getinfo(db->curl, CURLINFO_RESPONSE_CODE, &rc); /* The response code is zero if a non-HTTP transport was used. */ if ((rc != 0) && (rc != 200)) { ERROR( "curl_xml plugin: curl_easy_perform failed with response code %ld (%s)", rc, url); return -1; } status = cx_parse_xml(db, db->buffer); db->buffer_fill = 0; return status; } /* }}} int cx_read */ /* Configuration handling functions {{{ */ static int cx_config_add_values(const char *name, cx_xpath_t *xpath, /* {{{ */ oconfig_item_t *ci) { if (ci->values_num < 1) { WARNING("curl_xml plugin: `ValuesFrom' needs at least one argument."); return -1; } for (int i = 0; i < ci->values_num; i++) if (ci->values[i].type != OCONFIG_TYPE_STRING) { WARNING("curl_xml plugin: `ValuesFrom' needs only string argument."); return -1; } sfree(xpath->values); xpath->values_len = 0; xpath->values = malloc(sizeof(cx_values_t) * ci->values_num); if (xpath->values == NULL) return -1; xpath->values_len = (size_t)ci->values_num; /* populate cx_values_t structure */ for (int i = 0; i < ci->values_num; i++) { xpath->values[i].path_len = sizeof(ci->values[i].value.string); sstrncpy(xpath->values[i].path, ci->values[i].value.string, sizeof(xpath->values[i].path)); } return 0; } /* }}} cx_config_add_values */ static int cx_config_add_xpath(cx_t *db, oconfig_item_t *ci) /* {{{ */ { cx_xpath_t *xpath = calloc(1, sizeof(*xpath)); if (xpath == NULL) { ERROR("curl_xml plugin: calloc failed."); return -1; } int status = cf_util_get_string(ci, &xpath->path); if (status != 0) { cx_xpath_free(xpath); return status; } /* error out if xpath->path is an empty string */ if (strlen(xpath->path) == 0) { ERROR("curl_xml plugin: invalid xpath. " "xpath value can't be an empty string"); cx_xpath_free(xpath); return -1; } status = 0; for (int i = 0; i < ci->children_num; i++) { oconfig_item_t *child = ci->children + i; if (strcasecmp("Type", child->key) == 0) status = cf_util_get_string(child, &xpath->type); else if (strcasecmp("InstancePrefix", child->key) == 0) status = cf_util_get_string(child, &xpath->instance_prefix); else if (strcasecmp("InstanceFrom", child->key) == 0) status = cf_util_get_string(child, &xpath->instance); else if (strcasecmp("PluginInstanceFrom", child->key) == 0) status = cf_util_get_string(child, &xpath->plugin_instance_from); else if (strcasecmp("ValuesFrom", child->key) == 0) status = cx_config_add_values("ValuesFrom", xpath, child); else { WARNING("curl_xml plugin: Option `%s' not allowed here.", child->key); status = -1; } if (status != 0) break; } /* for (i = 0; i < ci->children_num; i++) */ if (status != 0) { cx_xpath_free(xpath); return status; } if (xpath->type == NULL) { WARNING("curl_xml plugin: `Type' missing in `xpath' block."); cx_xpath_free(xpath); return -1; } if (xpath->values_len == 0) { WARNING("curl_xml plugin: `ValuesFrom' missing in `xpath' block."); cx_xpath_free(xpath); return -1; } llentry_t *le = llentry_create(xpath->path, xpath); if (le == NULL) { ERROR("curl_xml plugin: llentry_create failed."); cx_xpath_free(xpath); return -1; } llist_append(db->xpath_list, le); return 0; } /* }}} int cx_config_add_xpath */ static int cx_config_add_namespace(cx_t *db, /* {{{ */ oconfig_item_t *ci) { if ((ci->values_num != 2) || (ci->values[0].type != OCONFIG_TYPE_STRING) || (ci->values[1].type != OCONFIG_TYPE_STRING)) { WARNING("curl_xml plugin: The `Namespace' option " "needs exactly two string arguments."); return EINVAL; } cx_namespace_t *ns = realloc(db->namespaces, sizeof(*db->namespaces) * (db->namespaces_num + 1)); if (ns == NULL) { ERROR("curl_xml plugin: realloc failed."); return ENOMEM; } db->namespaces = ns; ns = db->namespaces + db->namespaces_num; memset(ns, 0, sizeof(*ns)); ns->prefix = strdup(ci->values[0].value.string); ns->url = strdup(ci->values[1].value.string); if ((ns->prefix == NULL) || (ns->url == NULL)) { sfree(ns->prefix); sfree(ns->url); ERROR("curl_xml plugin: strdup failed."); return ENOMEM; } db->namespaces_num++; return 0; } /* }}} int cx_config_add_namespace */ /* Initialize db->curl */ static int cx_init_curl(cx_t *db) /* {{{ */ { db->curl = curl_easy_init(); if (db->curl == NULL) { ERROR("curl_xml plugin: curl_easy_init failed."); return -1; } curl_easy_setopt(db->curl, CURLOPT_NOSIGNAL, 1L); curl_easy_setopt(db->curl, CURLOPT_WRITEFUNCTION, cx_curl_callback); curl_easy_setopt(db->curl, CURLOPT_WRITEDATA, db); curl_easy_setopt(db->curl, CURLOPT_USERAGENT, COLLECTD_USERAGENT); curl_easy_setopt(db->curl, CURLOPT_ERRORBUFFER, db->curl_errbuf); curl_easy_setopt(db->curl, CURLOPT_FOLLOWLOCATION, 1L); curl_easy_setopt(db->curl, CURLOPT_MAXREDIRS, 50L); curl_easy_setopt(db->curl, CURLOPT_IPRESOLVE, db->address_family); if (db->user != NULL) { #ifdef HAVE_CURLOPT_USERNAME curl_easy_setopt(db->curl, CURLOPT_USERNAME, db->user); curl_easy_setopt(db->curl, CURLOPT_PASSWORD, (db->pass == NULL) ? "" : db->pass); #else size_t credentials_size; credentials_size = strlen(db->user) + 2; if (db->pass != NULL) credentials_size += strlen(db->pass); db->credentials = malloc(credentials_size); if (db->credentials == NULL) { ERROR("curl_xml plugin: malloc failed."); return -1; } snprintf(db->credentials, credentials_size, "%s:%s", db->user, (db->pass == NULL) ? "" : db->pass); curl_easy_setopt(db->curl, CURLOPT_USERPWD, db->credentials); #endif if (db->digest) curl_easy_setopt(db->curl, CURLOPT_HTTPAUTH, CURLAUTH_DIGEST); } curl_easy_setopt(db->curl, CURLOPT_SSL_VERIFYPEER, db->verify_peer ? 1L : 0L); curl_easy_setopt(db->curl, CURLOPT_SSL_VERIFYHOST, db->verify_host ? 2L : 0L); if (db->cacert != NULL) curl_easy_setopt(db->curl, CURLOPT_CAINFO, db->cacert); if (db->headers != NULL) curl_easy_setopt(db->curl, CURLOPT_HTTPHEADER, db->headers); if (db->post_body != NULL) curl_easy_setopt(db->curl, CURLOPT_POSTFIELDS, db->post_body); #ifdef HAVE_CURLOPT_TIMEOUT_MS if (db->timeout >= 0) curl_easy_setopt(db->curl, CURLOPT_TIMEOUT_MS, (long)db->timeout); else curl_easy_setopt(db->curl, CURLOPT_TIMEOUT_MS, (long)CDTIME_T_TO_MS(plugin_get_interval())); #endif return 0; } /* }}} int cx_init_curl */ static int cx_config_add_url(oconfig_item_t *ci) /* {{{ */ { if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING)) { WARNING("curl_xml plugin: The `URL' block " "needs exactly one string argument."); return -1; } cx_t *db = calloc(1, sizeof(*db)); if (db == NULL) { ERROR("curl_xml plugin: calloc failed."); return -1; } db->instance = strdup("default"); if (db->instance == NULL) { ERROR("curl_xml plugin: strdup failed."); sfree(db); return -1; } db->xpath_list = llist_create(); if (db->xpath_list == NULL) { ERROR("curl_xml plugin: list creation failed."); sfree(db->instance); sfree(db); return -1; } db->timeout = -1; db->address_family = CURL_IPRESOLVE_WHATEVER; int status = cf_util_get_string(ci, &db->url); if (status != 0) { llist_destroy(db->xpath_list); sfree(db->instance); sfree(db); return status; } cdtime_t interval = 0; /* Fill the `cx_t' structure.. */ for (int i = 0; i < ci->children_num; i++) { oconfig_item_t *child = ci->children + i; if (strcasecmp("Instance", child->key) == 0) status = cf_util_get_string(child, &db->instance); else if (strcasecmp("Plugin", child->key) == 0) status = cf_util_get_string(child, &db->plugin_name); else if (strcasecmp("Host", child->key) == 0) status = cf_util_get_string(child, &db->host); else if (strcasecmp("User", child->key) == 0) status = cf_util_get_string(child, &db->user); else if (strcasecmp("Password", child->key) == 0) status = cf_util_get_string(child, &db->pass); else if (strcasecmp("Digest", child->key) == 0) status = cf_util_get_boolean(child, &db->digest); else if (strcasecmp("VerifyPeer", child->key) == 0) status = cf_util_get_boolean(child, &db->verify_peer); else if (strcasecmp("VerifyHost", child->key) == 0) status = cf_util_get_boolean(child, &db->verify_host); else if (strcasecmp("CACert", child->key) == 0) status = cf_util_get_string(child, &db->cacert); else if (strcasecmp("xpath", child->key) == 0) status = cx_config_add_xpath(db, child); else if (strcasecmp("Header", child->key) == 0) status = cx_config_append_string("Header", &db->headers, child); else if (strcasecmp("Post", child->key) == 0) status = cf_util_get_string(child, &db->post_body); else if (strcasecmp("Namespace", child->key) == 0) status = cx_config_add_namespace(db, child); else if (strcasecmp("Interval", child->key) == 0) status = cf_util_get_cdtime(child, &interval); else if (strcasecmp("Timeout", child->key) == 0) status = cf_util_get_int(child, &db->timeout); else if (strcasecmp("Statistics", child->key) == 0) { db->stats = curl_stats_from_config(child); if (db->stats == NULL) status = -1; } else if (strcasecmp("AddressFamily", child->key) == 0) { char *af = NULL; status = cf_util_get_string(child, &af); if (status != 0 || af == NULL) { WARNING("curl_xml plugin: Cannot parse value of `%s' for URL `%s'.", child->key, db->url); } else if (strcasecmp("any", af) == 0) { db->address_family = CURL_IPRESOLVE_WHATEVER; } else if (strcasecmp("ipv4", af) == 0) { db->address_family = CURL_IPRESOLVE_V4; } else if (strcasecmp("ipv6", af) == 0) { /* If curl supports ipv6, use it. If not, log a warning and * fall back to default - don't set status to non-zero. */ curl_version_info_data *curl_info = curl_version_info(CURLVERSION_NOW); if (curl_info->features & CURL_VERSION_IPV6) db->address_family = CURL_IPRESOLVE_V6; else WARNING("curl_xml plugin: IPv6 not supported by this libCURL. " "Using fallback `any'."); } else { WARNING("curl_xml plugin: Unsupported value of `%s' for URL `%s'.", child->key, db->url); status = -1; } } else { WARNING("curl_xml plugin: Option `%s' not allowed here.", child->key); status = -1; } if (status != 0) break; } if (status != 0) { cx_free(db); return status; } if (llist_size(db->xpath_list) == 0) { WARNING("curl_xml plugin: No `xpath' block within `URL' block `%s'.", db->url); cx_free(db); return -1; } if (cx_init_curl(db) != 0) { cx_free(db); return -1; } /* If all went well, register this database for reading */ DEBUG("curl_xml plugin: Registering new read callback: %s", db->instance); char *cb_name = ssnprintf_alloc("curl_xml-%s-%s", db->instance, db->url); plugin_register_complex_read(/* group = */ "curl_xml", cb_name, cx_read, /* interval = */ interval, &(user_data_t){ .data = db, .free_func = cx_free, }); sfree(cb_name); return 0; } /* }}} int cx_config_add_url */ /* }}} End of configuration handling functions */ static int cx_config(oconfig_item_t *ci) /* {{{ */ { int success = 0; int errors = 0; for (int i = 0; i < ci->children_num; i++) { oconfig_item_t *child = ci->children + i; if (strcasecmp("URL", child->key) == 0) { if (cx_config_add_url(child) == 0) success++; else errors++; } else { WARNING("curl_xml plugin: Option `%s' not allowed here.", child->key); errors++; } } if ((success == 0) && (errors > 0)) { ERROR("curl_xml plugin: All statements failed."); return -1; } return 0; } /* }}} int cx_config */ static int cx_init(void) /* {{{ */ { /* Call this while collectd is still single-threaded to avoid * initialization issues in libgcrypt. */ curl_global_init(CURL_GLOBAL_SSL); return 0; } /* }}} int cx_init */ void module_register(void) { plugin_register_complex_config("curl_xml", cx_config); plugin_register_init("curl_xml", cx_init); } /* void module_register */