/**
* collectd - src/curl_json.c
* Copyright (C) 2009 Doug MacEachern
- * Copyright (C) 2006-2010 Florian octo Forster
+ * Copyright (C) 2006-2013 Florian octo Forster
*
* 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
*
* Authors:
* Doug MacEachern <dougm at hyperic.com>
- * Florian octo Forster <octo at verplant.org>
+ * Florian octo Forster <octo at collectd.org>
**/
#include "collectd.h"
#include "plugin.h"
#include "configfile.h"
#include "utils_avltree.h"
+#include "utils_complain.h"
+
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <sys/un.h>
#include <curl/curl.h>
+
#include <yajl/yajl_parse.h>
+#if HAVE_YAJL_YAJL_VERSION_H
+# include <yajl/yajl_version.h>
+#endif
+
+#if defined(YAJL_MAJOR) && (YAJL_MAJOR > 1)
+# define HAVE_YAJL_V2 1
+#endif
#define CJ_DEFAULT_HOST "localhost"
#define CJ_KEY_MAGIC 0x43484b59UL /* CHKY */
typedef struct cj_key_s cj_key_t;
struct cj_key_s /* {{{ */
{
+ unsigned long magic;
char *path;
char *type;
char *instance;
- unsigned long magic;
};
/* }}} */
char *instance;
char *host;
+ char *sock;
+
char *url;
char *user;
char *pass;
_Bool verify_peer;
_Bool verify_host;
char *cacert;
+ struct curl_slist *headers;
+ char *post_body;
CURL *curl;
char curl_errbuf[CURL_ERROR_SIZE];
c_avl_tree_t *tree;
cj_key_t *key;
};
+ _Bool in_array;
+ int index;
char name[DATA_MAX_NAME_LEN];
} state[YAJL_MAX_DEPTH];
};
typedef struct cj_s cj_t; /* }}} */
+#if HAVE_YAJL_V2
+typedef size_t yajl_len_t;
+#else
+typedef unsigned int yajl_len_t;
+#endif
+
static int cj_read (user_data_t *ud);
-static int cj_curl_perform (cj_t *db, CURL *curl);
static void cj_submit (cj_t *db, cj_key_t *key, value_t *value);
static size_t cj_curl_callback (void *buf, /* {{{ */
return (0);
status = yajl_parse(db->yajl, (unsigned char *)buf, len);
- if ((status != yajl_status_ok)
- && (status != yajl_status_insufficient_data))
+ if (status == yajl_status_ok)
+ return (len);
+#if !HAVE_YAJL_V2
+ else if (status == yajl_status_insufficient_data)
+ return (len);
+#endif
+
+ if (status != yajl_status_ok)
{
unsigned char *msg =
yajl_get_error(db->yajl, /* verbose = */ 1,
ds = plugin_get_ds (key->type);
if (ds == NULL)
- return -1; /* let plugin_write do the complaining */
- else
- return ds->ds[0].type; /* XXX support ds->ds_len > 1 */
+ {
+ static char type[DATA_MAX_NAME_LEN] = "!!!invalid!!!";
+
+ assert (key->type != NULL);
+ if (strcmp (type, key->type) != 0)
+ {
+ ERROR ("curl_json plugin: Unable to look up DS type \"%s\".",
+ key->type);
+ sstrncpy (type, key->type, sizeof (type));
+ }
+
+ return -1;
+ }
+ else if (ds->ds_num > 1)
+ {
+ static c_complain_t complaint = C_COMPLAIN_INIT_STATIC;
+
+ c_complain_once (LOG_WARNING, &complaint,
+ "curl_json plugin: The type \"%s\" has more than one data source. "
+ "This is currently not supported. I will return the type of the "
+ "first data source, but this will likely lead to problems later on.",
+ key->type);
+ }
+
+ return ds->ds[0].type;
+}
+
+static int cj_cb_map_key (void *ctx, const unsigned char *val,
+ yajl_len_t len);
+
+static void cj_cb_inc_array_index (void *ctx, _Bool update_key)
+{
+ cj_t *db = (cj_t *)ctx;
+
+ if (!db->state[db->depth].in_array)
+ return;
+
+ db->state[db->depth].index++;
+
+ if (update_key)
+ {
+ char name[DATA_MAX_NAME_LEN];
+
+ ssnprintf (name, sizeof (name), "%d", db->state[db->depth].index - 1);
+
+ cj_cb_map_key (ctx, (unsigned char *)name, (yajl_len_t) strlen (name));
+ }
}
/* yajl callbacks */
#define CJ_CB_ABORT 0
#define CJ_CB_CONTINUE 1
-/* "number" may not be null terminated, so copy it into a buffer before
- * parsing. */
+static int cj_cb_boolean (void * ctx, int boolVal)
+{
+ cj_cb_inc_array_index (ctx, /* update_key = */ 0);
+ return (CJ_CB_CONTINUE);
+}
+
+static int cj_cb_null (void * ctx)
+{
+ cj_cb_inc_array_index (ctx, /* update_key = */ 0);
+ return (CJ_CB_CONTINUE);
+}
+
static int cj_cb_number (void *ctx,
- const char *number, unsigned int number_len)
+ const char *number, yajl_len_t number_len)
{
char buffer[number_len + 1];
int type;
int status;
- if ((key == NULL) || !CJ_IS_KEY (key))
- return (CJ_CB_CONTINUE);
-
+ /* Create a null-terminated version of the string. */
memcpy (buffer, number, number_len);
buffer[sizeof (buffer) - 1] = 0;
+ if ((key == NULL) || !CJ_IS_KEY (key)) {
+ if (key != NULL)
+ NOTICE ("curl_json plugin: Found \"%s\", but the configuration expects"
+ " a map.", buffer);
+ cj_cb_inc_array_index (ctx, /* update_key = */ 1);
+ key = db->state[db->depth].key;
+ if (key == NULL) {
+ return (CJ_CB_CONTINUE);
+ }
+ }
+ else
+ {
+ cj_cb_inc_array_index (ctx, /* update_key = */ 1);
+ }
+
type = cj_get_type (key);
status = parse_value (buffer, &vt, type);
if (status != 0)
return (CJ_CB_CONTINUE);
} /* int cj_cb_number */
-static int cj_cb_map_key (void *ctx, const unsigned char *val,
- unsigned int len)
+/* Queries the key-tree of the parent context for "in_name" and, if found,
+ * updates the "key" field of the current context. Otherwise, "key" is set to
+ * NULL. */
+static int cj_cb_map_key (void *ctx,
+ unsigned char const *in_name, yajl_len_t in_name_len)
{
cj_t *db = (cj_t *)ctx;
c_avl_tree_t *tree;
if (tree != NULL)
{
- cj_key_t *value;
+ cj_key_t *value = NULL;
char *name;
+ size_t name_len;
+ /* Create a null-terminated version of the name. */
name = db->state[db->depth].name;
- len = COUCH_MIN(len, sizeof (db->state[db->depth].name)-1);
- sstrncpy (name, (char *)val, len+1);
-
- if (c_avl_get (tree, name, (void *) &value) == 0)
- db->state[db->depth].key = value;
+ name_len = COUCH_MIN ((size_t) in_name_len,
+ sizeof (db->state[db->depth].name) - 1);
+ memcpy (name, in_name, name_len);
+ name[name_len] = 0;
+
+ if (c_avl_get (tree, name, (void *) &value) == 0) {
+ if (CJ_IS_KEY((cj_key_t*)value)) {
+ db->state[db->depth].key = value;
+ }
+ else {
+ db->state[db->depth].tree = (c_avl_tree_t*) value;
+ }
+ }
else if (c_avl_get (tree, CJ_ANY, (void *) &value) == 0)
- db->state[db->depth].key = value;
+ if (CJ_IS_KEY((cj_key_t*)value)) {
+ db->state[db->depth].key = value;
+ }
+ else {
+ db->state[db->depth].tree = (c_avl_tree_t*) value;
+ }
else
db->state[db->depth].key = NULL;
}
}
static int cj_cb_string (void *ctx, const unsigned char *val,
- unsigned int len)
+ yajl_len_t len)
{
- cj_t *db = (cj_t *)ctx;
- char str[len + 1];
-
- /* Create a null-terminated version of the string. */
- memcpy (str, val, len);
- str[len] = 0;
-
- /* No configuration for this string -> simply return. */
- if (db->state[db->depth].key == NULL)
- return (CJ_CB_CONTINUE);
-
- if (!CJ_IS_KEY (db->state[db->depth].key))
- {
- NOTICE ("curl_json plugin: Found string \"%s\", but the configuration "
- "expects a map here.", str);
- return (CJ_CB_CONTINUE);
- }
-
/* Handle the string as if it was a number. */
return (cj_cb_number (ctx, (const char *) val, len));
} /* int cj_cb_string */
cj_t *db = (cj_t *)ctx;
if (++db->depth >= YAJL_MAX_DEPTH)
{
- ERROR ("curl_json plugin: %s depth exceeds max, aborting.", db->url);
+ ERROR ("curl_json plugin: %s depth exceeds max, aborting.",
+ db->url ? db->url : db->sock);
return (CJ_CB_ABORT);
}
return (CJ_CB_CONTINUE);
static int cj_cb_start_map (void *ctx)
{
+ cj_cb_inc_array_index (ctx, /* update_key = */ 1);
return cj_cb_start (ctx);
}
static int cj_cb_start_array (void * ctx)
{
+ cj_t *db = (cj_t *)ctx;
+ cj_cb_inc_array_index (ctx, /* update_key = */ 1);
+ if (db->depth+1 < YAJL_MAX_DEPTH) {
+ db->state[db->depth+1].in_array = 1;
+ db->state[db->depth+1].index = 0;
+ }
return cj_cb_start (ctx);
}
static int cj_cb_end_array (void * ctx)
{
+ cj_t *db = (cj_t *)ctx;
+ db->state[db->depth].in_array = 0;
return cj_cb_end (ctx);
}
static yajl_callbacks ycallbacks = {
- NULL, /* null */
- NULL, /* boolean */
+ cj_cb_null, /* null */
+ cj_cb_boolean, /* boolean */
NULL, /* integer */
NULL, /* double */
cj_cb_number,
sfree (db->instance);
sfree (db->host);
+ sfree (db->sock);
+
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);
sfree (db);
} /* }}} void cj_free */
return c_avl_create ((int (*) (const void *, const void *)) strcmp);
}
+static int cj_config_append_string (const char *name, struct curl_slist **dest, /* {{{ */
+ oconfig_item_t *ci)
+{
+ if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
+ {
+ WARNING ("curl_json plugin: `%s' needs exactly one string argument.", name);
+ return (-1);
+ }
+
+ *dest = curl_slist_append(*dest, ci->values[0].value.string);
+ if (*dest == NULL)
+ return (-1);
+
+ return (0);
+} /* }}} int cj_config_append_string */
+
static int cj_config_add_key (cj_t *db, /* {{{ */
oconfig_item_t *ci)
{
len = ptr-name;
if (len == 0)
break;
+ len = COUCH_MIN(len, sizeof (ent)-1);
sstrncpy (ent, name, len+1);
if (c_avl_get (tree, ent, (void *) &value) != 0)
return (-1);
}
+ curl_easy_setopt (db->curl, CURLOPT_NOSIGNAL, 1L);
curl_easy_setopt (db->curl, CURLOPT_WRITEFUNCTION, cj_curl_callback);
curl_easy_setopt (db->curl, CURLOPT_WRITEDATA, db);
curl_easy_setopt (db->curl, CURLOPT_USERAGENT,
curl_easy_setopt (db->curl, CURLOPT_USERPWD, db->credentials);
}
- curl_easy_setopt (db->curl, CURLOPT_SSL_VERIFYPEER, (int) db->verify_peer);
+ curl_easy_setopt (db->curl, CURLOPT_SSL_VERIFYPEER, (long) db->verify_peer);
curl_easy_setopt (db->curl, CURLOPT_SSL_VERIFYHOST,
- (int) (db->verify_host ? 2 : 0));
+ 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);
return (0);
} /* }}} int cj_init_curl */
memset (db, 0, sizeof (*db));
if (strcasecmp ("URL", ci->key) == 0)
- {
status = cf_util_get_string (ci, &db->url);
- if (status != 0)
- {
- sfree (db);
- return (status);
- }
- }
+ else if (strcasecmp ("Sock", ci->key) == 0)
+ status = cf_util_get_string (ci, &db->sock);
else
{
ERROR ("curl_json plugin: cj_config: "
"Invalid key: %s", ci->key);
return (-1);
}
+ if (status != 0)
+ {
+ sfree (db);
+ return (status);
+ }
/* Fill the `cj_t' structure.. */
for (i = 0; i < ci->children_num; i++)
status = cf_util_get_string (child, &db->instance);
else if (strcasecmp ("Host", child->key) == 0)
status = cf_util_get_string (child, &db->host);
- else if (strcasecmp ("User", child->key) == 0)
+ else if (db->url && strcasecmp ("User", child->key) == 0)
status = cf_util_get_string (child, &db->user);
- else if (strcasecmp ("Password", child->key) == 0)
+ else if (db->url && strcasecmp ("Password", child->key) == 0)
status = cf_util_get_string (child, &db->pass);
- else if (strcasecmp ("VerifyPeer", child->key) == 0)
+ else if (db->url && strcasecmp ("VerifyPeer", child->key) == 0)
status = cf_util_get_boolean (child, &db->verify_peer);
- else if (strcasecmp ("VerifyHost", child->key) == 0)
+ else if (db->url && strcasecmp ("VerifyHost", child->key) == 0)
status = cf_util_get_boolean (child, &db->verify_host);
- else if (strcasecmp ("CACert", child->key) == 0)
+ else if (db->url && strcasecmp ("CACert", child->key) == 0)
status = cf_util_get_string (child, &db->cacert);
+ else if (db->url && strcasecmp ("Header", child->key) == 0)
+ status = cj_config_append_string ("Header", &db->headers, child);
+ else if (db->url && strcasecmp ("Post", child->key) == 0)
+ status = cf_util_get_string (child, &db->post_body);
else if (strcasecmp ("Key", child->key) == 0)
status = cj_config_add_key (db, child);
else
{
if (db->tree == NULL)
{
- WARNING ("curl_json plugin: No (valid) `Key' block "
- "within `URL' block `%s'.", db->url);
+ WARNING ("curl_json plugin: No (valid) `Key' block within `%s' \"`%s'\".",
+ db->url ? "URL" : "Sock", db->url ? db->url : db->sock);
status = -1;
}
- if (status == 0)
+ if (status == 0 && db->url)
status = cj_init_curl (db);
}
if (status == 0)
{
user_data_t ud;
- char cb_name[DATA_MAX_NAME_LEN];
+ char *cb_name;
if (db->instance == NULL)
db->instance = strdup("default");
ud.data = (void *) db;
ud.free_func = cj_free;
- ssnprintf (cb_name, sizeof (cb_name), "curl_json-%s-%s",
- db->instance, db->url);
+ cb_name = ssnprintf_alloc ("curl_json-%s-%s",
+ db->instance, db->url ? db->url : db->sock);
- plugin_register_complex_read (/* group = */ NULL, cb_name, cj_read,
+ plugin_register_complex_read (/* group = */ "curl_json", cb_name, cj_read,
/* interval = */ NULL, &ud);
+ sfree (cb_name);
}
else
{
{
oconfig_item_t *child = ci->children + i;
- if (strcasecmp ("URL", child->key) == 0)
+ if (strcasecmp ("Sock", child->key) == 0
+ || strcasecmp ("URL", child->key) == 0)
{
status = cj_config_add_url (child);
if (status == 0)
host = db->host;
if (key->instance == NULL)
- ssnprintf (vl.type_instance, sizeof (vl.type_instance), "%s-%s",
- db->state[db->depth-1].name, db->state[db->depth].name);
+ {
+ if ((db->depth == 0) || (strcmp ("", db->state[db->depth-1].name) == 0))
+ sstrncpy (vl.type_instance, db->state[db->depth].name, sizeof (vl.type_instance));
+ else
+ ssnprintf (vl.type_instance, sizeof (vl.type_instance), "%s-%s",
+ db->state[db->depth-1].name, db->state[db->depth].name);
+ }
else
sstrncpy (vl.type_instance, key->instance, sizeof (vl.type_instance));
plugin_dispatch_values (&vl);
} /* }}} int cj_submit */
-static int cj_curl_perform (cj_t *db, CURL *curl) /* {{{ */
+static int cj_sock_perform (cj_t *db) /* {{{ */
{
- int status;
- long rc;
- char *url;
- yajl_handle yprev = db->yajl;
+ char errbuf[1024];
+ struct sockaddr_un sa_unix = {};
+ sa_unix.sun_family = AF_UNIX;
+ sstrncpy (sa_unix.sun_path, db->sock, sizeof (sa_unix.sun_path));
- db->yajl = yajl_alloc (&ycallbacks, NULL, NULL, (void *)db);
- if (db->yajl == NULL)
+ int fd = socket (AF_UNIX, SOCK_STREAM, 0);
+ if (fd < 0)
+ return (-1);
+ if (connect (fd, (struct sockaddr *)&sa_unix, sizeof(sa_unix)) < 0)
{
- ERROR ("curl_json plugin: yajl_alloc failed.");
- db->yajl = yprev;
+ ERROR ("curl_json plugin: connect(%s) failed: %s",
+ (db->sock != NULL) ? db->sock : "<null>",
+ sstrerror(errno, errbuf, sizeof (errbuf)));
+ close (fd);
return (-1);
}
- url = NULL;
- curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &url);
+ ssize_t red;
+ do {
+ unsigned char buffer[4096];
+ red = read (fd, buffer, sizeof(buffer));
+ if (red < 0) {
+ ERROR ("curl_json plugin: read(%s) failed: %s",
+ (db->sock != NULL) ? db->sock : "<null>",
+ sstrerror(errno, errbuf, sizeof (errbuf)));
+ close (fd);
+ return (-1);
+ }
+ if (!cj_curl_callback (buffer, red, 1, db))
+ break;
+ } while (red > 0);
+ close (fd);
+ return (0);
+} /* }}} int cj_sock_perform */
- status = curl_easy_perform (curl);
- if (status != 0)
+
+static int cj_curl_perform(cj_t *db) /* {{{ */
+{
+ int status;
+ long rc;
+ char *url;
+ 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 != NULL) ? url : "<null>");
- yajl_free (db->yajl);
- db->yajl = yprev;
+ status, db->curl_errbuf, url);
return (-1);
}
- curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &rc);
+ 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_json plugin: curl_easy_perform failed with "
"response code %ld (%s)", rc, url);
+ return (-1);
+ }
+ return (0);
+} /* }}} int cj_curl_perform */
+
+static int cj_perform (cj_t *db) /* {{{ */
+{
+ int status;
+ yajl_handle yprev = db->yajl;
+
+ db->yajl = yajl_alloc (&ycallbacks,
+#if HAVE_YAJL_V2
+ /* alloc funcs = */ NULL,
+#else
+ /* alloc funcs = */ NULL, NULL,
+#endif
+ /* context = */ (void *)db);
+ if (db->yajl == NULL)
+ {
+ ERROR ("curl_json plugin: yajl_alloc failed.");
+ db->yajl = yprev;
+ return (-1);
+ }
+
+ if (db->url)
+ status = cj_curl_perform (db);
+ else
+ status = cj_sock_perform (db);
+ if (status < 0)
+ {
yajl_free (db->yajl);
db->yajl = yprev;
return (-1);
}
- status = yajl_parse_complete (db->yajl);
+#if HAVE_YAJL_V2
+ status = yajl_complete_parse(db->yajl);
+#else
+ status = yajl_parse_complete(db->yajl);
+#endif
if (status != yajl_status_ok)
{
unsigned char *errmsg;
yajl_free (db->yajl);
db->yajl = yprev;
return (0);
-} /* }}} int cj_curl_perform */
+} /* }}} int cj_perform */
static int cj_read (user_data_t *ud) /* {{{ */
{
db->state[db->depth].tree = db->tree;
db->key = NULL;
- return cj_curl_perform (db, db->curl);
+ return cj_perform (db);
} /* }}} int cj_read */
+static int cj_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 cj_init */
+
void module_register (void)
{
plugin_register_complex_config ("curl_json", cj_config);
+ plugin_register_init ("curl_json", cj_init);
} /* void module_register */
/* vim: set sw=2 sts=2 et fdm=marker : */
projects / collectd.git / blobdiff