/**
* collectd - src/curl_json.c
* Copyright (C) 2009 Doug MacEachern
- * Copyright (C) 2006-2009 Florian octo Forster
+ * Copyright (C) 2006-2011 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 <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 */
-#define CJ_IS_KEY(key) (key)->magic == CJ_KEY_MAGIC
+#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;
- unsigned long magic;
};
/* }}} */
char *user;
char *pass;
char *credentials;
- int verify_peer;
- int verify_host;
+ _Bool verify_peer;
+ _Bool verify_host;
char *cacert;
+ struct curl_slist *headers;
+ char *post_body;
CURL *curl;
char curl_errbuf[CURL_ERROR_SIZE];
};
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);
status = yajl_parse(db->yajl, (unsigned char *)buf, len);
if (status == yajl_status_ok)
- {
- status = yajl_parse_complete(db->yajl);
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, 1, (unsigned char *)buf, len);
+ yajl_get_error(db->yajl, /* verbose = */ 1,
+ /* jsonText = */ (unsigned char *) buf, (unsigned int) len);
ERROR ("curl_json plugin: yajl_parse failed: %s", msg);
yajl_free_error(db->yajl, msg);
return (0); /* abort write callback */
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!!!";
-/* yajl callbacks */
-static int cj_cb_integer (void *ctx, long val)
-{
- cj_t *db = (cj_t *)ctx;
- cj_key_t *key = db->state[db->depth].key;
+ 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));
+ }
- if (key != NULL)
+ return -1;
+ }
+ else if (ds->ds_num > 1)
{
- value_t vt;
- int type;
+ static c_complain_t complaint = C_COMPLAIN_INIT_STATIC;
- type = cj_get_type (key);
- if (type == DS_TYPE_COUNTER)
- vt.counter = (counter_t) val;
- else if (type == DS_TYPE_GAUGE)
- vt.gauge = (gauge_t) val;
- else if (type == DS_TYPE_DERIVE)
- vt.derive = (derive_t) val;
- else if (type == DS_TYPE_ABSOLUTE)
- vt.absolute = (absolute_t) val;
- else
- return 0;
-
- cj_submit (db, key, &vt);
+ 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 1;
+
+ return ds->ds[0].type;
}
-static int cj_cb_double (void *ctx, double val)
+/* 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_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;
+ value_t vt;
+ int type;
+ int status;
- if (key != NULL)
- {
- value_t vt;
- int type;
+ if ((key == NULL) || !CJ_IS_KEY (key))
+ return (CJ_CB_CONTINUE);
- type = cj_get_type (key);
- if (type == DS_TYPE_COUNTER)
- vt.counter = (counter_t) val;
- else if (type == DS_TYPE_GAUGE)
- vt.gauge = (gauge_t) val;
- else if (type == DS_TYPE_DERIVE)
- vt.derive = (derive_t) val;
- else if (type == DS_TYPE_ABSOLUTE)
- vt.absolute = (absolute_t) val;
- else
- return 0;
+ memcpy (buffer, number, number_len);
+ buffer[sizeof (buffer) - 1] = 0;
- cj_submit (db, key, &vt);
+ type = cj_get_type (key);
+ status = parse_value (buffer, &vt, type);
+ if (status != 0)
+ {
+ NOTICE ("curl_json plugin: Unable to parse number: \"%s\"", buffer);
+ return (CJ_CB_CONTINUE);
}
- return 1;
-}
+
+ cj_submit (db, key, &vt);
+ return (CJ_CB_CONTINUE);
+} /* int cj_cb_number */
static int cj_cb_map_key (void *ctx, const unsigned char *val,
- unsigned int len)
+ yajl_len_t len)
{
cj_t *db = (cj_t *)ctx;
c_avl_tree_t *tree;
db->state[db->depth].key = NULL;
}
- return 1;
+ return (CJ_CB_CONTINUE);
}
static int cj_cb_string (void *ctx, const unsigned char *val,
- unsigned int len)
+ yajl_len_t len)
{
cj_t *db = (cj_t *)ctx;
- c_avl_tree_t *tree;
- char *ptr;
-
- if (db->depth != 1) /* e.g. _all_dbs */
- return 1;
+ char str[len + 1];
- cj_cb_map_key (ctx, val, len); /* same logic */
+ /* Create a null-terminated version of the string. */
+ memcpy (str, val, len);
+ str[len] = 0;
- tree = db->state[db->depth].tree;
+ /* No configuration for this string -> simply return. */
+ if (db->state[db->depth].key == NULL)
+ return (CJ_CB_CONTINUE);
- if ((tree != NULL) && (ptr = rindex (db->url, '/')))
+ if (!CJ_IS_KEY (db->state[db->depth].key))
{
- char url[PATH_MAX];
- CURL *curl;
-
- /* url =~ s,[^/]+$,$name, */
- len = (ptr - db->url) + 1;
- ptr = url;
- sstrncpy (ptr, db->url, sizeof (url));
- sstrncpy (ptr + len, db->state[db->depth].name, sizeof (url) - len);
-
- curl = curl_easy_duphandle (db->curl);
- curl_easy_setopt (curl, CURLOPT_URL, url);
- cj_curl_perform (db, curl);
- curl_easy_cleanup (curl);
+ NOTICE ("curl_json plugin: Found string \"%s\", but the configuration "
+ "expects a map here.", str);
+ return (CJ_CB_CONTINUE);
}
- return 1;
-}
+
+ /* Handle the string as if it was a number. */
+ return (cj_cb_number (ctx, (const char *) val, len));
+} /* int cj_cb_string */
static int cj_cb_start (void *ctx)
{
if (++db->depth >= YAJL_MAX_DEPTH)
{
ERROR ("curl_json plugin: %s depth exceeds max, aborting.", db->url);
- return 0;
+ return (CJ_CB_ABORT);
}
- return 1;
+ return (CJ_CB_CONTINUE);
}
static int cj_cb_end (void *ctx)
cj_t *db = (cj_t *)ctx;
db->state[db->depth].tree = NULL;
--db->depth;
- return 1;
+ return (CJ_CB_CONTINUE);
}
static int cj_cb_start_map (void *ctx)
static int cj_cb_end_array (void * ctx)
{
- return cj_cb_start (ctx);
+ return cj_cb_end (ctx);
}
static yajl_callbacks ycallbacks = {
NULL, /* null */
NULL, /* boolean */
- cj_cb_integer,
- cj_cb_double,
- NULL, /* number */
+ NULL, /* integer */
+ NULL, /* double */
+ cj_cb_number,
cj_cb_string,
cj_cb_start_map,
cj_cb_map_key,
sfree (db->pass);
sfree (db->credentials);
sfree (db->cacert);
+ sfree (db->post_body);
+ curl_slist_free_all (db->headers);
sfree (db);
} /* }}} void cj_free */
/* Configuration handling functions {{{ */
-static int cj_config_add_string (const char *name, char **dest, /* {{{ */
- oconfig_item_t *ci)
+static c_avl_tree_t *cj_avl_create(void)
+{
+ 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))
{
return (-1);
}
- sfree (*dest);
- *dest = strdup (ci->values[0].value.string);
+ *dest = curl_slist_append(*dest, ci->values[0].value.string);
if (*dest == NULL)
return (-1);
return (0);
-} /* }}} int cj_config_add_string */
-
-static int cj_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_json plugin: `%s' needs exactly one boolean argument.", name);
- return (-1);
- }
-
- *dest = ci->values[0].value.boolean ? 1 : 0;
-
- return (0);
-} /* }}} int cj_config_set_boolean */
-
-static c_avl_tree_t *cj_avl_create(void)
-{
- return c_avl_create ((int (*) (const void *, const void *)) strcmp);
-}
+} /* }}} int cj_config_append_string */
static int cj_config_add_key (cj_t *db, /* {{{ */
oconfig_item_t *ci)
if (strcasecmp ("Key", ci->key) == 0)
{
- status = cj_config_add_string ("Key", &key->path, ci);
+ status = cf_util_get_string (ci, &key->path);
if (status != 0)
{
sfree (key);
oconfig_item_t *child = ci->children + i;
if (strcasecmp ("Type", child->key) == 0)
- status = cj_config_add_string ("Type", &key->type, child);
+ status = cf_util_get_string (child, &key->type);
else if (strcasecmp ("Instance", child->key) == 0)
- status = cj_config_add_string ("Instance", &key->instance, child);
+ status = cf_util_get_string (child, &key->instance);
else
{
WARNING ("curl_json plugin: Option `%s' not allowed here.", child->key);
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, db->verify_peer);
+ curl_easy_setopt (db->curl, CURLOPT_SSL_VERIFYPEER, (long) db->verify_peer);
curl_easy_setopt (db->curl, CURLOPT_SSL_VERIFYHOST,
- 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 */
if (strcasecmp ("URL", ci->key) == 0)
{
- status = cj_config_add_string ("URL", &db->url, ci);
+ status = cf_util_get_string (ci, &db->url);
if (status != 0)
{
sfree (db);
oconfig_item_t *child = ci->children + i;
if (strcasecmp ("Instance", child->key) == 0)
- status = cj_config_add_string ("Instance", &db->instance, child);
+ status = cf_util_get_string (child, &db->instance);
else if (strcasecmp ("Host", child->key) == 0)
- status = cj_config_add_string ("Host", &db->host, child);
+ status = cf_util_get_string (child, &db->host);
else if (strcasecmp ("User", child->key) == 0)
- status = cj_config_add_string ("User", &db->user, child);
+ status = cf_util_get_string (child, &db->user);
else if (strcasecmp ("Password", child->key) == 0)
- status = cj_config_add_string ("Password", &db->pass, child);
+ status = cf_util_get_string (child, &db->pass);
else if (strcasecmp ("VerifyPeer", child->key) == 0)
- status = cj_config_set_boolean ("VerifyPeer", &db->verify_peer, child);
+ status = cf_util_get_boolean (child, &db->verify_peer);
else if (strcasecmp ("VerifyHost", child->key) == 0)
- status = cj_config_set_boolean ("VerifyHost", &db->verify_host, child);
+ status = cf_util_get_boolean (child, &db->verify_host);
else if (strcasecmp ("CACert", child->key) == 0)
- status = cj_config_add_string ("CACert", &db->cacert, child);
+ status = cf_util_get_string (child, &db->cacert);
+ else if (strcasecmp ("Header", child->key) == 0)
+ status = cj_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 ("Key", child->key) == 0)
status = cj_config_add_key (db, child);
else
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));
char *url;
yajl_handle yprev = db->yajl;
- db->yajl = yajl_alloc (&ycallbacks, NULL, NULL, (void *)db);
+ 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);
}
- status = curl_easy_perform (curl);
+ url = NULL;
+ curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &url);
- yajl_free (db->yajl);
- db->yajl = yprev;
+ status = curl_easy_perform (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;
+ return (-1);
+ }
- curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &url);
curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &rc);
- if (rc != 200)
+ /* 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);
+ ERROR ("curl_json plugin: curl_easy_perform failed with "
+ "response code %ld (%s)", rc, url);
+ yajl_free (db->yajl);
+ db->yajl = yprev;
return (-1);
}
- if (status != 0)
+#if HAVE_YAJL_V2
+ status = yajl_complete_parse(db->yajl);
+#else
+ status = yajl_parse_complete(db->yajl);
+#endif
+ if (status != yajl_status_ok)
{
- ERROR ("curl_json plugin: curl_easy_perform failed with status %i: %s (%s)",
- status, db->curl_errbuf, url);
+ unsigned char *errmsg;
+
+ errmsg = yajl_get_error (db->yajl, /* verbose = */ 0,
+ /* jsonText = */ NULL, /* jsonTextLen = */ 0);
+ ERROR ("curl_json plugin: yajl_parse_complete failed: %s",
+ (char *) errmsg);
+ yajl_free_error (db->yajl, errmsg);
+ yajl_free (db->yajl);
+ db->yajl = yprev;
return (-1);
}
+ yajl_free (db->yajl);
+ db->yajl = yprev;
return (0);
} /* }}} int cj_curl_perform */
return cj_curl_perform (db, db->curl);
} /* }}} 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