static int cx_handle_base_xpath (char const *plugin_instance, /* {{{ */
char const *host,
xmlXPathContextPtr xpath_ctx, const data_set_t *ds,
char *base_xpath, cx_xpath_t *xpath)
{
int total_nodes;
int i;
xmlXPathObjectPtr base_node_obj = NULL;
xmlNodeSetPtr base_nodes = NULL;
value_list_t vl = VALUE_LIST_INIT;
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 nodes. "
"Skipping the xpath block...", 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: "
"InstanceFrom 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 */
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, (host != NULL) ? 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++)
{
int status;
xpath_ctx->node = base_nodes->nodeTab[i];
status = cx_handle_instance_xpath (xpath_ctx, xpath, &vl,
/* is_table = */ (total_nodes > 1));
if (status != 0)
continue; /* An error has already been reported. */
status = cx_handle_all_value_xpaths (xpath_ctx, xpath, ds, &vl);
if (status != 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_base_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 */