#endif
#define CJ_DEFAULT_HOST "localhost"
-#define CJ_KEY_MAGIC 0x43484b59UL /* CHKY */
-#define CJ_IS_KEY(key) ((key)->magic == CJ_KEY_MAGIC)
#define CJ_ANY "*"
#define COUCH_MIN(x, y) ((x) < (y) ? (x) : (y))
typedef struct cj_key_s cj_key_t;
struct cj_key_s /* {{{ */
{
- unsigned long magic;
char *path;
char *type;
char *instance;
};
/* }}} */
+/* cj_tree_entry_t is a union of either a metric configuration ("key") or a tree
+ * mapping array indexes / map keys to a descendant cj_tree_entry_t*. */
+typedef struct {
+ enum { KEY, TREE } type;
+ union {
+ c_avl_tree_t *tree;
+ cj_key_t *key;
+ };
+} cj_tree_entry_t;
+
+/* cj_state_t is a stack providing the configuration relevant for the context
+ * that is currently being parsed. If entry->type == KEY, the parser should
+ * expect a metric (a numeric value). If entry->type == TREE, the parser should
+ * expect an array of map to descent into. If entry == NULL, no configuration
+ * exists for this part of the JSON structure. */
+typedef struct {
+ cj_tree_entry_t *entry;
+ _Bool in_array;
+ int index;
+ char name[DATA_MAX_NAME_LEN];
+} cj_state_t;
+
struct cj_s /* {{{ */
{
char *instance;
+ char *plugin_name;
char *host;
char *sock;
yajl_handle yajl;
c_avl_tree_t *tree;
int depth;
- struct {
- union {
- c_avl_tree_t *tree;
- cj_key_t *key;
- };
- _Bool in_array;
- int index;
- char name[DATA_MAX_NAME_LEN];
- } state[YAJL_MAX_DEPTH];
+ cj_state_t state[YAJL_MAX_DEPTH];
};
typedef struct cj_s cj_t; /* }}} */
} /* }}} size_t cj_curl_callback */
static int cj_get_type(cj_key_t *key) {
- const data_set_t *ds;
-
- if ((key == NULL) || !CJ_IS_KEY(key))
+ if (key == NULL)
return -EINVAL;
- ds = plugin_get_ds(key->type);
+ const data_set_t *ds = plugin_get_ds(key->type);
if (ds == NULL) {
static char type[DATA_MAX_NAME_LEN] = "!!!invalid!!!";
sstrncpy(db->state[db->depth].name, key, sizeof(db->state[db->depth].name));
- c_avl_tree_t *tree = db->state[db->depth - 1].tree;
- if (tree == NULL) {
+ if (db->state[db->depth - 1].entry == NULL ||
+ db->state[db->depth - 1].entry->type != TREE) {
return 0;
}
- /* the parent has a key, so the tree pointer is invalid. */
- if (CJ_IS_KEY(db->state[db->depth - 1].key)) {
- return 0;
- }
+ c_avl_tree_t *tree = db->state[db->depth - 1].entry->tree;
+ cj_tree_entry_t *e = NULL;
- void *value = NULL;
- if (c_avl_get(tree, key, (void *)&value) == 0) {
- if (CJ_IS_KEY((cj_key_t *)value)) {
- db->state[db->depth].key = value;
- } else {
- db->state[db->depth].tree = value;
- }
- } else if (c_avl_get(tree, CJ_ANY, (void *)&value) == 0) {
- if (CJ_IS_KEY((cj_key_t *)value)) {
- db->state[db->depth].key = value;
- } else {
- db->state[db->depth].tree = value;
- }
+ if (c_avl_get(tree, key, (void *)&e) == 0) {
+ db->state[db->depth].entry = e;
+ } else if (c_avl_get(tree, CJ_ANY, (void *)&e) == 0) {
+ db->state[db->depth].entry = e;
} else {
- db->state[db->depth].key = NULL;
+ db->state[db->depth].entry = NULL;
}
return 0;
db->state[db->depth].index++;
char name[DATA_MAX_NAME_LEN];
- ssnprintf(name, sizeof(name), "%d", db->state[db->depth].index);
+ snprintf(name, sizeof(name), "%d", db->state[db->depth].index);
cj_load_key(db, name);
}
#define CJ_CB_ABORT 0
#define CJ_CB_CONTINUE 1
-static int cj_cb_boolean(void *ctx, int boolVal) {
- cj_advance_array(ctx);
- return CJ_CB_CONTINUE;
-}
-
static int cj_cb_null(void *ctx) {
cj_advance_array(ctx);
return CJ_CB_CONTINUE;
}
static int cj_cb_number(void *ctx, const char *number, yajl_len_t number_len) {
- char buffer[number_len + 1];
-
cj_t *db = (cj_t *)ctx;
- cj_key_t *key = db->state[db->depth].key;
/* Create a null-terminated version of the string. */
+ char buffer[number_len + 1];
memcpy(buffer, number, number_len);
buffer[sizeof(buffer) - 1] = 0;
- if (key == NULL) {
- /* no config for this element. */
- cj_advance_array(ctx);
- return CJ_CB_CONTINUE;
- } else if (!CJ_IS_KEY(key)) {
- /* the config expects a map or an array. */
- NOTICE(
- "curl_json plugin: Found \"%s\", but the configuration expects a map.",
- buffer);
+ if (db->state[db->depth].entry == NULL ||
+ db->state[db->depth].entry->type != KEY) {
+ if (db->state[db->depth].entry != NULL) {
+ NOTICE("curl_json plugin: Found \"%s\", but the configuration expects a "
+ "map.",
+ buffer);
+ }
cj_advance_array(ctx);
return CJ_CB_CONTINUE;
}
+ cj_key_t *key = db->state[db->depth].entry->key;
+
int type = cj_get_type(key);
value_t vt;
int status = parse_value(buffer, &vt, type);
return cj_cb_number(ctx, (const char *)val, len);
} /* int cj_cb_string */
+static int cj_cb_boolean(void *ctx, int boolVal) {
+ if (boolVal)
+ return cj_cb_number(ctx, "1", 1);
+ else
+ return cj_cb_number(ctx, "0", 1);
+} /* int cj_cb_boolean */
+
static int cj_cb_end(void *ctx) {
cj_t *db = (cj_t *)ctx;
- db->state[db->depth].tree = NULL;
+ memset(&db->state[db->depth], 0, sizeof(db->state[db->depth]));
db->depth--;
cj_advance_array(ctx);
return CJ_CB_CONTINUE;
static void cj_tree_free(c_avl_tree_t *tree) /* {{{ */
{
char *name;
- void *value;
+ cj_tree_entry_t *e;
- while (c_avl_pick(tree, (void *)&name, (void *)&value) == 0) {
- cj_key_t *key = (cj_key_t *)value;
+ while (c_avl_pick(tree, (void *)&name, (void *)&e) == 0) {
+ sfree(name);
- if (CJ_IS_KEY(key))
- cj_key_free(key);
+ if (e->type == KEY)
+ cj_key_free(e->key);
else
- cj_tree_free((c_avl_tree_t *)value);
-
- sfree(name);
+ cj_tree_free(e->tree);
+ sfree(e);
}
c_avl_destroy(tree);
db->tree = NULL;
sfree(db->instance);
+ sfree(db->plugin_name);
sfree(db->host);
sfree(db->sock);
len = COUCH_MIN(len, sizeof(name) - 1);
sstrncpy(name, start, len + 1);
- c_avl_tree_t *value;
- if (c_avl_get(tree, name, (void *)&value) != 0) {
- value = cj_avl_create();
- c_avl_insert(tree, strdup(name), value);
+ cj_tree_entry_t *e;
+ if (c_avl_get(tree, name, (void *)&e) != 0) {
+ e = calloc(1, sizeof(*e));
+ if (e == NULL)
+ return ENOMEM;
+ e->type = TREE;
+ e->tree = cj_avl_create();
+
+ c_avl_insert(tree, strdup(name), e);
}
- tree = value;
+ if (e->type != TREE)
+ return EINVAL;
+
+ tree = e->tree;
start = end + 1;
}
return -1;
}
- c_avl_insert(tree, strdup(start), key);
+ cj_tree_entry_t *e = calloc(1, sizeof(*e));
+ if (e == NULL)
+ return ENOMEM;
+ e->type = KEY;
+ e->key = key;
+
+ c_avl_insert(tree, strdup(start), e);
return 0;
} /* }}} int cj_append_key */
ERROR("curl_json plugin: calloc failed.");
return -1;
}
- key->magic = CJ_KEY_MAGIC;
if (strcasecmp("Key", ci->key) == 0) {
status = cf_util_get_string(ci, &key->path);
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_URL, db->url);
curl_easy_setopt(db->curl, CURLOPT_FOLLOWLOCATION, 1L);
curl_easy_setopt(db->curl, CURLOPT_MAXREDIRS, 50L);
return -1;
}
- ssnprintf(db->credentials, credentials_size, "%s:%s", db->user,
- (db->pass == NULL) ? "" : db->pass);
+ 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 (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 (db->url && strcasecmp("User", child->key) == 0)
if (key->instance == NULL) {
int len = 0;
for (int i = 0; i < db->depth; i++)
- len += ssnprintf(vl.type_instance + len, sizeof(vl.type_instance) - len,
- i ? "-%s" : "%s", db->state[i + 1].name);
+ len += snprintf(vl.type_instance + len, sizeof(vl.type_instance) - len,
+ i ? "-%s" : "%s", db->state[i + 1].name);
} else
sstrncpy(vl.type_instance, key->instance, sizeof(vl.type_instance));
sstrncpy(vl.host, cj_host(db), sizeof(vl.host));
- sstrncpy(vl.plugin, "curl_json", sizeof(vl.plugin));
+ sstrncpy(vl.plugin, (db->plugin_name != NULL) ? db->plugin_name : "curl_json",
+ sizeof(vl.plugin));
sstrncpy(vl.plugin_instance, db->instance, sizeof(vl.plugin_instance));
sstrncpy(vl.type, key->type, sizeof(vl.type));
int status;
long rc;
char *url;
- url = db->url;
+
+ curl_easy_setopt(db->curl, CURLOPT_URL, db->url);
status = curl_easy_perform(db->curl);
if (status != CURLE_OK) {
ERROR("curl_json plugin: curl_easy_perform failed with status %i: %s (%s)",
- status, db->curl_errbuf, url);
+ status, db->curl_errbuf, db->url);
return -1;
}
if (db->stats != NULL)
db->depth = 0;
memset(&db->state, 0, sizeof(db->state));
- db->state[db->depth].tree = db->tree;
- return cj_perform(db);
+ /* This is not a compound literal because EPEL6's GCC is not cool enough to
+ * handle anonymous unions within compound literals. */
+ cj_tree_entry_t root = {0};
+ root.type = TREE;
+ root.tree = db->tree;
+ db->state[0].entry = &root;
+
+ int status = cj_perform(db);
+
+ db->state[0].entry = NULL;
+
+ return status;
} /* }}} int cj_read */
static int cj_init(void) /* {{{ */