--- /dev/null
+/**
+ * collectd - src/curl_xml.c
+ * Copyright (C) 2009 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 <amit.gupta221 at gmail.com>
+ **/
+
+#include "collectd.h"
+#include "common.h"
+#include "plugin.h"
+#include "configfile.h"
+#include "utils_avltree.h"
+
+#include <libxml/parser.h>
+#include <libxml/tree.h>
+#include <libxml/xpath.h>
+
+#include <curl/curl.h>
+
+#define CX_DEFAULT_HOST "localhost"
+#define CX_KEY_MAGIC 0x43484b59UL /* CHKY */
+#define CX_IS_KEY(key) (key)->magic == CX_KEY_MAGIC
+
+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;
+ int values_len;
+ char *instance_prefix;
+ char *instance;
+ int is_table;
+ unsigned long magic;
+};
+typedef struct cx_xpath_s cx_xpath_t;
+/* }}} */
+
+struct cx_s /* {{{ */
+{
+ char *instance;
+ char *host;
+
+ char *url;
+ char *user;
+ char *pass;
+ char *credentials;
+ int verify_peer;
+ int verify_host;
+ char *cacert;
+
+ CURL *curl;
+ char curl_errbuf[CURL_ERROR_SIZE];
+ char *buffer;
+ size_t buffer_size;
+ size_t buffer_fill;
+
+ c_avl_tree_t *tree; /* tree of xpath blocks */
+};
+typedef struct cx_s cx_t; /* }}} */
+
+static int cx_read (user_data_t *ud);
+static int cx_curl_perform (cx_t *db, CURL *curl);
+static int cx_parse_stats_xml (xmlChar *ptr, cx_t *db);
+static int cx_submit_statistics(xmlDocPtr doc, xmlXPathContextPtr xpath_ctx,
+ cx_t *db);
+static int cx_submit_xpath_values (char *plugin_instance, xmlXPathContextPtr xpath_ctx,
+ char *base_xpath, cx_xpath_t *xpath);
+static int cx_if_not_text_node (xmlNodePtr node);
+static xmlXPathObjectPtr cx_evaluate_xpath (xmlXPathContextPtr xpath_ctx,
+ xmlChar *expr);
+static int cx_check_type (cx_xpath_t *xpath);
+
+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;
+
+ 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;
+
+ temp = (char *) 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->instance);
+ sfree (xpath->values);
+ sfree (xpath);
+} /* }}} void cx_xpath_free */
+
+static void cx_tree_free (c_avl_tree_t *tree) /* {{{ */
+{
+ char *name;
+ void *value;
+
+ while (c_avl_pick (tree, (void *) &name, (void *) &value) == 0)
+ {
+ cx_xpath_t *key = (cx_xpath_t *)value;
+
+ if (CX_IS_KEY(key))
+ cx_xpath_free (key);
+ else
+ cx_tree_free ((c_avl_tree_t *)value);
+
+ sfree (name);
+ }
+
+ c_avl_destroy (tree);
+} /* }}} void cx_tree_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->tree != NULL)
+ cx_tree_free (db->tree);
+ db->tree = NULL;
+
+ sfree (db->buffer);
+ sfree (db->instance);
+ sfree (db->host);
+
+ sfree (db->url);
+ sfree (db->user);
+ sfree (db->pass);
+ sfree (db->credentials);
+ sfree (db->cacert);
+
+ sfree (db);
+} /* }}} void cx_free */
+
+/* Configuration handling functions {{{ */
+
+static int cx_config_add_values (const char *name, cx_xpath_t *xpath, /* {{{ */
+ oconfig_item_t *ci)
+{
+ int i;
+
+ if (ci->values_num < 1)
+ {
+ WARNING ("curl_xml plugin: `Values' needs at least one argument.");
+ return (-1);
+ }
+
+ for (i = 0; i < ci->values_num; i++)
+ if (ci->values[i].type != OCONFIG_TYPE_STRING)
+ {
+ WARNING ("curl_xml plugin: `Values' needs only string argument.");
+ return (-1);
+ }
+
+ sfree (xpath->values);
+
+ xpath->values_len = 0;
+ xpath->values = (cx_values_t *) malloc (sizeof (cx_values_t) * ci->values_num);
+ if (xpath->values == NULL)
+ return (-1);
+ xpath->values_len = ci->values_num;
+
+ /* populate cx_values_t structure */
+ for (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_string (const char *name, char **dest, /* {{{ */
+ oconfig_item_t *ci)
+{
+ 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);
+ }
+
+ sfree (*dest);
+ *dest = strdup (ci->values[0].value.string);
+ if (*dest == NULL)
+ return (-1);
+
+ return (0);
+} /* }}} int cx_config_add_string */
+
+static int cx_config_set_boolean (const char *name, int *dest, /* {{{ */
+ oconfig_item_t *ci)
+{
+ if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_BOOLEAN))
+ {
+ WARNING ("curl_xml plugin: `%s' needs exactly one boolean argument.", name);
+ return (-1);
+ }
+
+ *dest = ci->values[0].value.boolean ? 1 : 0;
+
+ return (0);
+} /* }}} int cx_config_set_boolean */
+
+static c_avl_tree_t *cx_avl_create(void) /* {{{ */
+{
+ return c_avl_create ((int (*) (const void *, const void *)) strcmp);
+} /* }}} cx_avl_create */
+
+static int cx_config_add_xpath (cx_t *db, /* {{{ */
+ oconfig_item_t *ci)
+{
+ cx_xpath_t *xpath;
+ int status;
+ int i;
+
+ if ((ci->values_num != 1)
+ || (ci->values[0].type != OCONFIG_TYPE_STRING))
+ {
+ WARNING ("curl_xml plugin: The `xpath' block "
+ "needs exactly one string argument.");
+ return (-1);
+ }
+
+ xpath = (cx_xpath_t *) malloc (sizeof (*xpath));
+ if (xpath == NULL)
+ {
+ ERROR ("curl_xml plugin: malloc failed.");
+ return (-1);
+ }
+ memset (xpath, 0, sizeof (*xpath));
+ xpath->magic = CX_KEY_MAGIC;
+
+ if (strcasecmp ("xpath", ci->key) == 0)
+ {
+ status = cx_config_add_string ("xpath", &xpath->path, ci);
+ if (status != 0)
+ {
+ sfree (xpath);
+ return (status);
+ }
+ }
+ else
+ {
+ ERROR ("curl_xml plugin: cx_config: "
+ "Invalid key: %s", ci->key);
+ return (-1);
+ }
+
+ status = 0;
+ for (i = 0; i < ci->children_num; i++)
+ {
+ oconfig_item_t *child = ci->children + i;
+
+ if (strcasecmp ("Type", child->key) == 0)
+ status = cx_config_add_string ("Type", &xpath->type, child);
+ else if (strcasecmp ("InstancePrefix", child->key) == 0)
+ status = cx_config_add_string ("InstancePrefix", &xpath->instance_prefix, child);
+ else if (strcasecmp ("Instance", child->key) == 0)
+ status = cx_config_add_string ("Instance", &xpath->instance, child);
+ else if (strcasecmp ("Values", child->key) == 0)
+ status = cx_config_add_values ("Values", 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++) */
+
+ while (status == 0)
+ {
+ if (xpath->type == NULL)
+ {
+ WARNING ("curl_xml plugin: `Type' missing in `xpath' block.");
+ status = -1;
+ }
+
+ break;
+ } /* while (status == 0) */
+
+ if (status == 0)
+ {
+ char *name;
+ c_avl_tree_t *tree;
+
+ if (db->tree == NULL)
+ db->tree = cx_avl_create();
+
+ tree = db->tree;
+ name = xpath->path;
+
+ if (*name)
+ c_avl_insert (tree, strdup(name), xpath);
+ else
+ {
+ ERROR ("curl_xml plugin: invalid key: %s", xpath->path);
+ status = -1;
+ }
+ }
+
+ return (status);
+} /* }}} int cx_config_add_xpath */
+
+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_WRITEFUNCTION, cx_curl_callback);
+ curl_easy_setopt (db->curl, CURLOPT_WRITEDATA, db);
+ curl_easy_setopt (db->curl, CURLOPT_USERAGENT,
+ PACKAGE_NAME"/"PACKAGE_VERSION);
+ curl_easy_setopt (db->curl, CURLOPT_ERRORBUFFER, db->curl_errbuf);
+ curl_easy_setopt (db->curl, CURLOPT_URL, db->url);
+
+ if (db->user != NULL)
+ {
+ size_t credentials_size;
+
+ credentials_size = strlen (db->user) + 2;
+ if (db->pass != NULL)
+ credentials_size += strlen (db->pass);
+
+ db->credentials = (char *) malloc (credentials_size);
+ if (db->credentials == NULL)
+ {
+ ERROR ("curl_xml plugin: malloc failed.");
+ return (-1);
+ }
+
+ ssnprintf (db->credentials, credentials_size, "%s:%s",
+ db->user, (db->pass == NULL) ? "" : db->pass);
+ curl_easy_setopt (db->curl, CURLOPT_USERPWD, db->credentials);
+ }
+
+ curl_easy_setopt (db->curl, CURLOPT_SSL_VERIFYPEER, db->verify_peer);
+ curl_easy_setopt (db->curl, CURLOPT_SSL_VERIFYHOST,
+ db->verify_host ? 2 : 0);
+ if (db->cacert != NULL)
+ curl_easy_setopt (db->curl, CURLOPT_CAINFO, db->cacert);
+
+ return (0);
+} /* }}} int cx_init_curl */
+
+static int cx_config_add_url (oconfig_item_t *ci) /* {{{ */
+{
+ cx_t *db;
+ int status = 0;
+ int i;
+
+ 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);
+ }
+
+ db = (cx_t *) malloc (sizeof (*db));
+ if (db == NULL)
+ {
+ ERROR ("curl_xml plugin: malloc failed.");
+ return (-1);
+ }
+ memset (db, 0, sizeof (*db));
+
+ if (strcasecmp ("URL", ci->key) == 0)
+ {
+ status = cx_config_add_string ("URL", &db->url, ci);
+ if (status != 0)
+ {
+ sfree (db);
+ return (status);
+ }
+ }
+ else
+ {
+ ERROR ("curl_xml plugin: cx_config: "
+ "Invalid key: %s", ci->key);
+ return (-1);
+ }
+
+ /* Fill the `cx_t' structure.. */
+ for (i = 0; i < ci->children_num; i++)
+ {
+ oconfig_item_t *child = ci->children + i;
+
+ if (strcasecmp ("Instance", child->key) == 0)
+ status = cx_config_add_string ("Instance", &db->instance, child);
+ else if (strcasecmp ("Host", child->key) == 0)
+ status = cx_config_add_string ("Host", &db->host, child);
+ else if (strcasecmp ("User", child->key) == 0)
+ status = cx_config_add_string ("User", &db->user, child);
+ else if (strcasecmp ("Password", child->key) == 0)
+ status = cx_config_add_string ("Password", &db->pass, child);
+ else if (strcasecmp ("VerifyPeer", child->key) == 0)
+ status = cx_config_set_boolean ("VerifyPeer", &db->verify_peer, child);
+ else if (strcasecmp ("VerifyHost", child->key) == 0)
+ status = cx_config_set_boolean ("VerifyHost", &db->verify_host, child);
+ else if (strcasecmp ("CACert", child->key) == 0)
+ status = cx_config_add_string ("CACert", &db->cacert, child);
+ else if (strcasecmp ("xpath", child->key) == 0)
+ status = cx_config_add_xpath (db, child);
+ else
+ {
+ WARNING ("curl_xml plugin: Option `%s' not allowed here.", child->key);
+ status = -1;
+ }
+
+ if (status != 0)
+ break;
+ }
+
+ if (status == 0)
+ {
+ if (db->tree == NULL)
+ {
+ WARNING ("curl_xml plugin: No (valid) `Key' block "
+ "within `URL' block `%s'.", db->url);
+ status = -1;
+ }
+ if (status == 0)
+ status = cx_init_curl (db);
+ }
+
+ /* If all went well, register this database for reading */
+ if (status == 0)
+ {
+ user_data_t ud;
+ char cb_name[DATA_MAX_NAME_LEN];
+
+ if (db->instance == NULL)
+ db->instance = strdup("default");
+
+ DEBUG ("curl_xml plugin: Registering new read callback: %s",
+ db->instance);
+
+ memset (&ud, 0, sizeof (ud));
+ ud.data = (void *) db;
+ ud.free_func = cx_free;
+
+ ssnprintf (cb_name, sizeof (cb_name), "curl_xml-%s-%s",
+ db->instance, db->url);
+
+ plugin_register_complex_read (cb_name, cx_read,
+ /* interval = */ NULL, &ud);
+ }
+ else
+ {
+ cx_free (db);
+ return (-1);
+ }
+
+ return (0);
+} /* }}} int cx_config_add_url */
+
+static int cx_config (oconfig_item_t *ci) /* {{{ */
+{
+ int success;
+ int errors;
+ int status;
+ int i;
+
+ success = 0;
+ errors = 0;
+
+ for (i = 0; i < ci->children_num; i++)
+ {
+ oconfig_item_t *child = ci->children + i;
+
+ if (strcasecmp ("URL", child->key) == 0)
+ {
+ status = cx_config_add_url (child);
+ if (status == 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 */
+
+/* }}} End of configuration handling functions */
+
+static int cx_read (user_data_t *ud) /* {{{ */
+{
+ cx_t *db;
+
+ if ((ud == NULL) || (ud->data == NULL))
+ {
+ ERROR ("curl_xml plugin: cx_read: Invalid user data.");
+ return (-1);
+ }
+
+ db = (cx_t *) ud->data;
+
+ return cx_curl_perform (db, db->curl);
+} /* }}} int cx_read */
+
+static int cx_curl_perform (cx_t *db, CURL *curl) /* {{{ */
+{
+ int status;
+ long rc;
+ char *ptr;
+ char *url;
+
+ db->buffer_fill = 0;
+ status = curl_easy_perform (curl);
+
+ curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &url);
+ curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &rc);
+
+ if (rc != 200)
+ {
+ ERROR ("curl_xml plugin: curl_easy_perform failed with response code %ld (%s)",
+ rc, url);
+ return (-1);
+ }
+
+ if (status != 0)
+ {
+ ERROR ("curl_xml plugin: curl_easy_perform failed with status %i: %s (%s)",
+ status, db->curl_errbuf, url);
+ return (-1);
+ }
+
+ ptr = db->buffer;
+
+ status = cx_parse_stats_xml(BAD_CAST ptr, db);
+ db->buffer_fill = 0;
+
+ return status;
+} /* }}} int cx_curl_perform */
+
+static int cx_parse_stats_xml(xmlChar* xml, cx_t *db) /* {{{ */
+{
+ int status;
+ xmlDocPtr doc;
+ xmlXPathContextPtr xpath_ctx;
+
+ /* Load the XML */
+ doc = xmlParseDoc(xml);
+ if (doc == NULL)
+ {
+ ERROR ("curl_xml plugin: Failed to parse the xml document - %s", xml);
+ return (-1);
+ }
+
+ xpath_ctx = xmlXPathNewContext(doc);
+ if(xpath_ctx == NULL)
+ {
+ ERROR ("curl_xml plugin: Failed to create the xml context");
+ xmlFreeDoc(doc);
+ return (-1);
+ }
+
+ status = cx_submit_statistics (doc, xpath_ctx, db);
+ /* Cleanup */
+ xmlXPathFreeContext(xpath_ctx);
+ xmlFreeDoc(doc);
+ return status;
+} /* }}} cx_parse_stats_xml */
+
+static int cx_submit_statistics(xmlDocPtr doc, /* {{{ */
+ xmlXPathContextPtr xpath_ctx, cx_t *db)
+{
+ c_avl_iterator_t *iter;
+ char *key;
+ cx_xpath_t *value;
+ int status=-1;
+
+ iter = c_avl_get_iterator (db->tree);
+ while (c_avl_iterator_next (iter, (void *) &key, (void *) &value) == 0)
+ {
+ if (cx_check_type(value) == -1)
+ continue;
+
+ if (cx_submit_xpath_values(db->instance, xpath_ctx, key, value) == 0)
+ status = 0; /* we got atleast one success */
+ } /* while (c_avl_iterator_next) */
+
+ return status;
+} /* }}} cx_submit_statistics */
+
+static int cx_check_type (cx_xpath_t *xpath) /* {{{ */
+{
+ const data_set_t *ds;
+
+ ds = plugin_get_ds (xpath->type);
+ 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 %i values, but config talks about %i",
+ xpath->type, ds->ds_num, xpath->values_len);
+ return (-1);
+ }
+
+ return (0);
+} /* }}} cx_check_type */
+
+static xmlXPathObjectPtr /* {{{ */
+ cx_evaluate_xpath (xmlXPathContextPtr xpath_ctx, xmlChar *expr)
+{
+ xmlXPathObjectPtr xpath_obj;
+
+ // XXX: When to free this?
+ 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)
+ 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 */
+
+static int /* {{{ */
+cx_submit_xpath_values (char *plugin_instance,
+ xmlXPathContextPtr xpath_ctx,
+ char *base_xpath, cx_xpath_t *xpath)
+{
+ int i;
+ int j;
+ int total_nodes;
+ int tmp_size;
+ int status=-1;
+ char *node_value;
+
+ xmlXPathObjectPtr base_node_obj = NULL;
+ xmlXPathObjectPtr instance_node_obj = NULL;
+ xmlXPathObjectPtr values_node_obj = NULL;
+ xmlNodeSetPtr base_nodes = NULL;
+ xmlNodeSetPtr instance_node = NULL;
+ xmlNodeSetPtr values_node = NULL;
+
+ value_list_t vl = VALUE_LIST_INIT;
+ const data_set_t *ds;
+
+ base_node_obj = cx_evaluate_xpath (xpath_ctx, BAD_CAST base_xpath);
+ if (base_node_obj == NULL)
+ return -1; /* error is logged already */
+
+ base_nodes = base_node_obj->nodesetval;
+ 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 node. Skipping...", base_xpath);
+ xmlXPathFreeObject (base_node_obj);
+ return -1;
+ }
+
+ /* If base_xpath returned multiple results, then */
+ /* Instance in the xpath block is required */
+ if (total_nodes > 1 && xpath->instance == NULL)
+ {
+ ERROR ("curl_xml plugin: "
+ "Instance is must in xpath block since the base xpath expression \"%s\" "
+ "returned multiple results. Skipping the xpath block...", base_xpath);
+ return -1;
+ }
+
+ /* set the values for the value_list */
+ ds = plugin_get_ds (xpath->type);
+ vl.values_len = ds->ds_num;
+ sstrncpy (vl.type, xpath->type, sizeof (vl.type));
+ sstrncpy (vl.plugin, "curl_xml", sizeof (vl.plugin));
+ sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+ if (plugin_instance != NULL)
+ sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
+
+ for (i = 0; i < total_nodes; i++)
+ {
+ xpath_ctx->node = base_nodes->nodeTab[i];
+
+ /* instance has to be an xpath expression */
+ if (xpath->instance != NULL)
+ {
+ instance_node_obj = cx_evaluate_xpath (xpath_ctx, BAD_CAST xpath->instance);
+ if (instance_node_obj == NULL)
+ continue; /* error is logged already */
+
+ instance_node = instance_node_obj->nodesetval;
+ tmp_size = (instance_node) ? instance_node->nodeNr : 0;
+
+ if ( (tmp_size == 0) && (total_nodes > 1) )
+ {
+ WARNING ("curl_xml plugin: "
+ "relative xpath expression for 'Instance' \"%s\" doesn't match "
+ "any of the nodes. Skipping the node - %s",
+ xpath->instance, base_nodes->nodeTab[i]->name);
+ xmlXPathFreeObject (instance_node_obj);
+ continue;
+ }
+
+ if (tmp_size > 1)
+ {
+ WARNING ("curl_xml plugin: "
+ "relative xpath expression for 'Instance' \"%s\" is expected "
+ "to return only one text node. Skipping the node - %s",
+ xpath->instance, base_nodes->nodeTab[i]->name);
+ xmlXPathFreeObject (instance_node_obj);
+ continue;
+ }
+
+ // ignoring the element if other than textnode/attribute
+ if (cx_if_not_text_node(instance_node->nodeTab[0]))
+ {
+ WARNING ("curl_xml plugin: "
+ "relative xpath expression \"%s\" is expected to return only text node "
+ "which is not the case. Skipping the node - %s",
+ xpath->instance, base_nodes->nodeTab[i]->name);
+ xmlXPathFreeObject (instance_node_obj);
+ continue;
+ }
+ }
+
+ for (j = 0; j < xpath->values_len; j++)
+ {
+ values_node_obj = cx_evaluate_xpath (xpath_ctx, BAD_CAST xpath->values[j].path);
+ values_node = values_node_obj->nodesetval;
+ tmp_size = (values_node) ? values_node->nodeNr : 0;
+
+ if (tmp_size == 0)
+ {
+ WARNING ("curl_xml plugin: "
+ "relative xpath expression \"%s\" doesn't match any of the nodes. "
+ "Skipping...", xpath->values[j].path);
+ xmlXPathFreeObject (values_node_obj);
+ continue;
+ }
+
+ if (tmp_size > 1)
+ {
+ WARNING ("curl_xml plugin: "
+ "relative xpath expression \"%s\" is expected to return "
+ "only one node. Skipping...", xpath->values[j].path);
+ xmlXPathFreeObject (values_node_obj);
+ continue;
+ }
+
+ /* 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\" is expected to return "
+ "only text/attribute node which is not the case. Skipping...",
+ xpath->values[j].path);
+ xmlXPathFreeObject (values_node_obj);
+ continue;
+ }
+
+ vl.values = (value_t *) malloc (sizeof (value_t) * vl.values_len);
+ if (vl.values == NULL)
+ {
+ ERROR ("curl_xml plugin: malloc failed.");
+ xmlXPathFreeObject (base_node_obj);
+ xmlXPathFreeObject (instance_node_obj);
+ xmlXPathFreeObject (values_node_obj);
+ return (-1);
+ }
+
+ node_value = (char *) xmlNodeGetContent(values_node->nodeTab[0]);
+ switch (ds->ds[j].type)
+ {
+ case DS_TYPE_COUNTER:
+ vl.values[j].counter = atoi(node_value);
+ break;
+ case DS_TYPE_DERIVE:
+ vl.values[j].derive = atoi(node_value);
+ break;
+ case DS_TYPE_ABSOLUTE:
+ vl.values[j].absolute = atoi(node_value);
+ break;
+ case DS_TYPE_GAUGE:
+ vl.values[j].absolute = atoi(node_value);
+ }
+
+ if (xpath->instance_prefix != NULL)
+ {
+ if (instance_node != NULL)
+ ssnprintf (vl.type_instance, sizeof (vl.type_instance),"%s-%s",
+ xpath->instance_prefix, (char *) xmlNodeGetContent(instance_node->nodeTab[0]));
+ else
+ sstrncpy (vl.type_instance, xpath->instance_prefix,
+ sizeof (vl.type_instance));
+ }
+ else
+ {
+ /* If instance_prefix and instance_node are NULL , then */
+ /* don't set the type_instance */
+ if (instance_node != NULL)
+ sstrncpy (vl.type_instance, (char *) xmlNodeGetContent(instance_node->nodeTab[0]),
+ sizeof (vl.type_instance));
+ }
+
+ /* free up object */
+ xmlXPathFreeObject (values_node_obj);
+
+ /* We have reached here which means that */
+ /* we have got something to work */
+ status = 0;
+ }
+
+ /* submit the values */
+ if (vl.values)
+ plugin_dispatch_values (&vl);
+
+ sfree(vl.values);
+ if (instance_node_obj != NULL)
+ xmlXPathFreeObject (instance_node_obj);
+ }
+
+ /* free up the allocated memory */
+ xmlXPathFreeObject (base_node_obj);
+
+ return status;
+} /* }}} cx_submit_xpath_values */
+
+void module_register (void)
+{
+ plugin_register_complex_config ("curl_xml", cx_config);
+} /* void module_register */
+
+/* vim: set sw=2 sts=2 et fdm=marker : */
projects / collectd.git / commitdiff