/**
* collectd - src/utils_format_json.c
- * Copyright (C) 2009 Florian octo Forster
+ * Copyright (C) 2009-2015 Florian octo Forster
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
**/
#include "collectd.h"
-#include "plugin.h"
-#include "common.h"
-#include "utils_cache.h"
#include "utils_format_json.h"
-static int json_escape_string (char *buffer, size_t buffer_size, /* {{{ */
- const char *string)
-{
- size_t src_pos;
+#include "common.h"
+#include "plugin.h"
+#include "utils_cache.h"
+
+#if HAVE_LIBYAJL
+#include <yajl/yajl_common.h>
+#include <yajl/yajl_gen.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
+#endif
+
+static int json_escape_string(char *buffer, size_t buffer_size, /* {{{ */
+ const char *string) {
size_t dst_pos;
if ((buffer == NULL) || (string == NULL))
- return (-EINVAL);
+ return -EINVAL;
if (buffer_size < 3)
- return (-ENOMEM);
+ return -ENOMEM;
dst_pos = 0;
-#define BUFFER_ADD(c) do { \
- if (dst_pos >= (buffer_size - 1)) { \
- buffer[buffer_size - 1] = 0; \
- return (-ENOMEM); \
- } \
- buffer[dst_pos] = (c); \
- dst_pos++; \
-} while (0)
+#define BUFFER_ADD(c) \
+ do { \
+ if (dst_pos >= (buffer_size - 1)) { \
+ buffer[buffer_size - 1] = 0; \
+ return -ENOMEM; \
+ } \
+ buffer[dst_pos] = (c); \
+ dst_pos++; \
+ } while (0)
/* Escape special characters */
- BUFFER_ADD ('"');
- for (src_pos = 0; string[src_pos] != 0; src_pos++)
- {
- if ((string[src_pos] == '"')
- || (string[src_pos] == '\\'))
- {
- BUFFER_ADD ('\\');
- BUFFER_ADD (string[src_pos]);
- }
- else if (string[src_pos] <= 0x001F)
- BUFFER_ADD ('?');
+ BUFFER_ADD('"');
+ for (size_t src_pos = 0; string[src_pos] != 0; src_pos++) {
+ if ((string[src_pos] == '"') || (string[src_pos] == '\\')) {
+ BUFFER_ADD('\\');
+ BUFFER_ADD(string[src_pos]);
+ } else if (string[src_pos] <= 0x001F)
+ BUFFER_ADD('?');
else
- BUFFER_ADD (string[src_pos]);
+ BUFFER_ADD(string[src_pos]);
} /* for */
- BUFFER_ADD ('"');
+ BUFFER_ADD('"');
buffer[dst_pos] = 0;
#undef BUFFER_ADD
- return (0);
+ return 0;
} /* }}} int json_escape_string */
-static int values_to_json (char *buffer, size_t buffer_size, /* {{{ */
- const data_set_t *ds, const value_list_t *vl, int store_rates)
-{
+static int values_to_json(char *buffer, size_t buffer_size, /* {{{ */
+ const data_set_t *ds, const value_list_t *vl,
+ int store_rates) {
size_t offset = 0;
- int i;
gauge_t *rates = NULL;
- memset (buffer, 0, buffer_size);
-
-#define BUFFER_ADD(...) do { \
- int status; \
- status = ssnprintf (buffer + offset, buffer_size - offset, \
- __VA_ARGS__); \
- if (status < 1) \
- { \
- sfree(rates); \
- return (-1); \
- } \
- else if (((size_t) status) >= (buffer_size - offset)) \
- { \
- sfree(rates); \
- return (-ENOMEM); \
- } \
- else \
- offset += ((size_t) status); \
-} while (0)
-
- BUFFER_ADD ("[");
- for (i = 0; i < ds->ds_num; i++)
- {
+ memset(buffer, 0, buffer_size);
+
+#define BUFFER_ADD(...) \
+ do { \
+ int status; \
+ status = snprintf(buffer + offset, buffer_size - offset, __VA_ARGS__); \
+ if (status < 1) { \
+ sfree(rates); \
+ return -1; \
+ } else if (((size_t)status) >= (buffer_size - offset)) { \
+ sfree(rates); \
+ return -ENOMEM; \
+ } else \
+ offset += ((size_t)status); \
+ } while (0)
+
+ BUFFER_ADD("[");
+ for (size_t i = 0; i < ds->ds_num; i++) {
if (i > 0)
- BUFFER_ADD (",");
+ BUFFER_ADD(",");
- if (ds->ds[i].type == DS_TYPE_GAUGE)
- {
- if(isfinite (vl->values[i].gauge))
- BUFFER_ADD (JSON_GAUGE_FORMAT, vl->values[i].gauge);
+ if (ds->ds[i].type == DS_TYPE_GAUGE) {
+ if (isfinite(vl->values[i].gauge))
+ BUFFER_ADD(JSON_GAUGE_FORMAT, vl->values[i].gauge);
else
- BUFFER_ADD ("null");
- }
- else if (store_rates)
- {
- if (rates == NULL)
- rates = uc_get_rate (ds, vl);
+ BUFFER_ADD("null");
+ } else if (store_rates) {
if (rates == NULL)
- {
- WARNING ("utils_format_json: uc_get_rate failed.");
+ rates = uc_get_rate(ds, vl);
+ if (rates == NULL) {
+ WARNING("utils_format_json: uc_get_rate failed.");
sfree(rates);
- return (-1);
+ return -1;
}
- if(isfinite (rates[i]))
- BUFFER_ADD (JSON_GAUGE_FORMAT, rates[i]);
+ if (isfinite(rates[i]))
+ BUFFER_ADD(JSON_GAUGE_FORMAT, rates[i]);
else
- BUFFER_ADD ("null");
- }
- else if (ds->ds[i].type == DS_TYPE_COUNTER)
- BUFFER_ADD ("%llu", vl->values[i].counter);
+ BUFFER_ADD("null");
+ } else if (ds->ds[i].type == DS_TYPE_COUNTER)
+ BUFFER_ADD("%" PRIu64, (uint64_t)vl->values[i].counter);
else if (ds->ds[i].type == DS_TYPE_DERIVE)
- BUFFER_ADD ("%"PRIi64, vl->values[i].derive);
+ BUFFER_ADD("%" PRIi64, vl->values[i].derive);
else if (ds->ds[i].type == DS_TYPE_ABSOLUTE)
- BUFFER_ADD ("%"PRIu64, vl->values[i].absolute);
- else
- {
- ERROR ("format_json: Unknown data source type: %i",
- ds->ds[i].type);
- sfree (rates);
- return (-1);
+ BUFFER_ADD("%" PRIu64, vl->values[i].absolute);
+ else {
+ ERROR("format_json: Unknown data source type: %i", ds->ds[i].type);
+ sfree(rates);
+ return -1;
}
} /* for ds->ds_num */
- BUFFER_ADD ("]");
+ BUFFER_ADD("]");
#undef BUFFER_ADD
- DEBUG ("format_json: values_to_json: buffer = %s;", buffer);
+ DEBUG("format_json: values_to_json: buffer = %s;", buffer);
sfree(rates);
- return (0);
+ return 0;
} /* }}} int values_to_json */
-static int dstypes_to_json (char *buffer, size_t buffer_size, /* {{{ */
- const data_set_t *ds)
-{
+static int dstypes_to_json(char *buffer, size_t buffer_size, /* {{{ */
+ const data_set_t *ds) {
size_t offset = 0;
- int i;
-
- memset (buffer, 0, buffer_size);
-
-#define BUFFER_ADD(...) do { \
- int status; \
- status = ssnprintf (buffer + offset, buffer_size - offset, \
- __VA_ARGS__); \
- if (status < 1) \
- return (-1); \
- else if (((size_t) status) >= (buffer_size - offset)) \
- return (-ENOMEM); \
- else \
- offset += ((size_t) status); \
-} while (0)
-
- BUFFER_ADD ("[");
- for (i = 0; i < ds->ds_num; i++)
- {
+
+ memset(buffer, 0, buffer_size);
+
+#define BUFFER_ADD(...) \
+ do { \
+ int status; \
+ status = snprintf(buffer + offset, buffer_size - offset, __VA_ARGS__); \
+ if (status < 1) \
+ return -1; \
+ else if (((size_t)status) >= (buffer_size - offset)) \
+ return -ENOMEM; \
+ else \
+ offset += ((size_t)status); \
+ } while (0)
+
+ BUFFER_ADD("[");
+ for (size_t i = 0; i < ds->ds_num; i++) {
if (i > 0)
- BUFFER_ADD (",");
+ BUFFER_ADD(",");
- BUFFER_ADD ("\"%s\"", DS_TYPE_TO_STRING (ds->ds[i].type));
+ BUFFER_ADD("\"%s\"", DS_TYPE_TO_STRING(ds->ds[i].type));
} /* for ds->ds_num */
- BUFFER_ADD ("]");
+ BUFFER_ADD("]");
#undef BUFFER_ADD
- DEBUG ("format_json: dstypes_to_json: buffer = %s;", buffer);
+ DEBUG("format_json: dstypes_to_json: buffer = %s;", buffer);
- return (0);
+ return 0;
} /* }}} int dstypes_to_json */
-static int dsnames_to_json (char *buffer, size_t buffer_size, /* {{{ */
- const data_set_t *ds)
-{
+static int dsnames_to_json(char *buffer, size_t buffer_size, /* {{{ */
+ const data_set_t *ds) {
size_t offset = 0;
- int i;
-
- memset (buffer, 0, buffer_size);
-
-#define BUFFER_ADD(...) do { \
- int status; \
- status = ssnprintf (buffer + offset, buffer_size - offset, \
- __VA_ARGS__); \
- if (status < 1) \
- return (-1); \
- else if (((size_t) status) >= (buffer_size - offset)) \
- return (-ENOMEM); \
- else \
- offset += ((size_t) status); \
-} while (0)
-
- BUFFER_ADD ("[");
- for (i = 0; i < ds->ds_num; i++)
- {
+
+ memset(buffer, 0, buffer_size);
+
+#define BUFFER_ADD(...) \
+ do { \
+ int status; \
+ status = snprintf(buffer + offset, buffer_size - offset, __VA_ARGS__); \
+ if (status < 1) \
+ return -1; \
+ else if (((size_t)status) >= (buffer_size - offset)) \
+ return -ENOMEM; \
+ else \
+ offset += ((size_t)status); \
+ } while (0)
+
+ BUFFER_ADD("[");
+ for (size_t i = 0; i < ds->ds_num; i++) {
if (i > 0)
- BUFFER_ADD (",");
+ BUFFER_ADD(",");
- BUFFER_ADD ("\"%s\"", ds->ds[i].name);
+ BUFFER_ADD("\"%s\"", ds->ds[i].name);
} /* for ds->ds_num */
- BUFFER_ADD ("]");
+ BUFFER_ADD("]");
#undef BUFFER_ADD
- DEBUG ("format_json: dsnames_to_json: buffer = %s;", buffer);
+ DEBUG("format_json: dsnames_to_json: buffer = %s;", buffer);
- return (0);
+ return 0;
} /* }}} int dsnames_to_json */
-static int meta_data_keys_to_json (char *buffer, size_t buffer_size, /* {{{ */
- meta_data_t *meta, char **keys, size_t keys_num)
-{
+static int meta_data_keys_to_json(char *buffer, size_t buffer_size, /* {{{ */
+ meta_data_t *meta, char **keys,
+ size_t keys_num) {
size_t offset = 0;
int status;
- size_t i;
buffer[0] = 0;
-#define BUFFER_ADD(...) do { \
- status = ssnprintf (buffer + offset, buffer_size - offset, \
- __VA_ARGS__); \
- if (status < 1) \
- return (-1); \
- else if (((size_t) status) >= (buffer_size - offset)) \
- return (-ENOMEM); \
- else \
- offset += ((size_t) status); \
-} while (0)
-
- for (i = 0; i < keys_num; ++i)
- {
+#define BUFFER_ADD(...) \
+ do { \
+ status = snprintf(buffer + offset, buffer_size - offset, __VA_ARGS__); \
+ if (status < 1) \
+ return -1; \
+ else if (((size_t)status) >= (buffer_size - offset)) \
+ return -ENOMEM; \
+ else \
+ offset += ((size_t)status); \
+ } while (0)
+
+ for (size_t i = 0; i < keys_num; ++i) {
int type;
char *key = keys[i];
- type = meta_data_type (meta, key);
- if (type == MD_TYPE_STRING)
- {
+ type = meta_data_type(meta, key);
+ if (type == MD_TYPE_STRING) {
char *value = NULL;
- if (meta_data_get_string (meta, key, &value) == 0)
- {
+ if (meta_data_get_string(meta, key, &value) == 0) {
char temp[512] = "";
- status = json_escape_string (temp, sizeof (temp), value);
- sfree (value);
+ status = json_escape_string(temp, sizeof(temp), value);
+ sfree(value);
if (status != 0)
return status;
- BUFFER_ADD (",\"%s\":%s", key, temp);
+ BUFFER_ADD(",\"%s\":%s", key, temp);
}
- }
- else if (type == MD_TYPE_SIGNED_INT)
- {
+ } else if (type == MD_TYPE_SIGNED_INT) {
int64_t value = 0;
- if (meta_data_get_signed_int (meta, key, &value) == 0)
- BUFFER_ADD (",\"%s\":%"PRIi64, key, value);
- }
- else if (type == MD_TYPE_UNSIGNED_INT)
- {
+ if (meta_data_get_signed_int(meta, key, &value) == 0)
+ BUFFER_ADD(",\"%s\":%" PRIi64, key, value);
+ } else if (type == MD_TYPE_UNSIGNED_INT) {
uint64_t value = 0;
- if (meta_data_get_unsigned_int (meta, key, &value) == 0)
- BUFFER_ADD (",\"%s\":%"PRIu64, key, value);
- }
- else if (type == MD_TYPE_DOUBLE)
- {
+ if (meta_data_get_unsigned_int(meta, key, &value) == 0)
+ BUFFER_ADD(",\"%s\":%" PRIu64, key, value);
+ } else if (type == MD_TYPE_DOUBLE) {
double value = 0.0;
- if (meta_data_get_double (meta, key, &value) == 0)
- BUFFER_ADD (",\"%s\":%f", key, value);
- }
- else if (type == MD_TYPE_BOOLEAN)
- {
+ if (meta_data_get_double(meta, key, &value) == 0)
+ BUFFER_ADD(",\"%s\":%f", key, value);
+ } else if (type == MD_TYPE_BOOLEAN) {
_Bool value = 0;
- if (meta_data_get_boolean (meta, key, &value) == 0)
- BUFFER_ADD (",\"%s\":%s", key, value ? "true" : "false");
+ if (meta_data_get_boolean(meta, key, &value) == 0)
+ BUFFER_ADD(",\"%s\":%s", key, value ? "true" : "false");
}
} /* for (keys) */
- if (offset <= 0)
- return (ENOENT);
+ if (offset == 0)
+ return ENOENT;
buffer[0] = '{'; /* replace leading ',' */
- BUFFER_ADD ("}");
+ BUFFER_ADD("}");
#undef BUFFER_ADD
- return (0);
+ return 0;
} /* }}} int meta_data_keys_to_json */
-static int meta_data_to_json (char *buffer, size_t buffer_size, /* {{{ */
- meta_data_t *meta)
-{
+static int meta_data_to_json(char *buffer, size_t buffer_size, /* {{{ */
+ meta_data_t *meta) {
char **keys = NULL;
size_t keys_num;
int status;
- size_t i;
if ((buffer == NULL) || (buffer_size == 0) || (meta == NULL))
- return (EINVAL);
+ return EINVAL;
- status = meta_data_toc (meta, &keys);
+ status = meta_data_toc(meta, &keys);
if (status <= 0)
- return (status);
- keys_num = (size_t) status;
+ return status;
+ keys_num = (size_t)status;
- status = meta_data_keys_to_json (buffer, buffer_size, meta, keys, keys_num);
+ status = meta_data_keys_to_json(buffer, buffer_size, meta, keys, keys_num);
- for (i = 0; i < keys_num; ++i)
- sfree (keys[i]);
- sfree (keys);
+ for (size_t i = 0; i < keys_num; ++i)
+ sfree(keys[i]);
+ sfree(keys);
return status;
} /* }}} int meta_data_to_json */
-static int value_list_to_json (char *buffer, size_t buffer_size, /* {{{ */
- const data_set_t *ds, const value_list_t *vl, int store_rates)
-{
+static int value_list_to_json(char *buffer, size_t buffer_size, /* {{{ */
+ const data_set_t *ds, const value_list_t *vl,
+ int store_rates) {
char temp[512];
size_t offset = 0;
int status;
- memset (buffer, 0, buffer_size);
+ memset(buffer, 0, buffer_size);
-#define BUFFER_ADD(...) do { \
- status = ssnprintf (buffer + offset, buffer_size - offset, \
- __VA_ARGS__); \
- if (status < 1) \
- return (-1); \
- else if (((size_t) status) >= (buffer_size - offset)) \
- return (-ENOMEM); \
- else \
- offset += ((size_t) status); \
-} while (0)
+#define BUFFER_ADD(...) \
+ do { \
+ status = snprintf(buffer + offset, buffer_size - offset, __VA_ARGS__); \
+ if (status < 1) \
+ return -1; \
+ else if (((size_t)status) >= (buffer_size - offset)) \
+ return -ENOMEM; \
+ else \
+ offset += ((size_t)status); \
+ } while (0)
/* All value lists have a leading comma. The first one will be replaced with
* a square bracket in `format_json_finalize'. */
- BUFFER_ADD (",{");
+ BUFFER_ADD(",{");
- status = values_to_json (temp, sizeof (temp), ds, vl, store_rates);
+ status = values_to_json(temp, sizeof(temp), ds, vl, store_rates);
if (status != 0)
- return (status);
- BUFFER_ADD ("\"values\":%s", temp);
+ return status;
+ BUFFER_ADD("\"values\":%s", temp);
- status = dstypes_to_json (temp, sizeof (temp), ds);
+ status = dstypes_to_json(temp, sizeof(temp), ds);
if (status != 0)
- return (status);
- BUFFER_ADD (",\"dstypes\":%s", temp);
+ return status;
+ BUFFER_ADD(",\"dstypes\":%s", temp);
- status = dsnames_to_json (temp, sizeof (temp), ds);
+ status = dsnames_to_json(temp, sizeof(temp), ds);
if (status != 0)
- return (status);
- BUFFER_ADD (",\"dsnames\":%s", temp);
-
- BUFFER_ADD (",\"time\":%.3f", CDTIME_T_TO_DOUBLE (vl->time));
- BUFFER_ADD (",\"interval\":%.3f", CDTIME_T_TO_DOUBLE (vl->interval));
-
-#define BUFFER_ADD_KEYVAL(key, value) do { \
- status = json_escape_string (temp, sizeof (temp), (value)); \
- if (status != 0) \
- return (status); \
- BUFFER_ADD (",\"%s\":%s", (key), temp); \
-} while (0)
-
- BUFFER_ADD_KEYVAL ("host", vl->host);
- BUFFER_ADD_KEYVAL ("plugin", vl->plugin);
- BUFFER_ADD_KEYVAL ("plugin_instance", vl->plugin_instance);
- BUFFER_ADD_KEYVAL ("type", vl->type);
- BUFFER_ADD_KEYVAL ("type_instance", vl->type_instance);
-
- if (vl->meta != NULL)
- {
+ return status;
+ BUFFER_ADD(",\"dsnames\":%s", temp);
+
+ BUFFER_ADD(",\"time\":%.3f", CDTIME_T_TO_DOUBLE(vl->time));
+ BUFFER_ADD(",\"interval\":%.3f", CDTIME_T_TO_DOUBLE(vl->interval));
+
+#define BUFFER_ADD_KEYVAL(key, value) \
+ do { \
+ status = json_escape_string(temp, sizeof(temp), (value)); \
+ if (status != 0) \
+ return status; \
+ BUFFER_ADD(",\"%s\":%s", (key), temp); \
+ } while (0)
+
+ BUFFER_ADD_KEYVAL("host", vl->host);
+ BUFFER_ADD_KEYVAL("plugin", vl->plugin);
+ BUFFER_ADD_KEYVAL("plugin_instance", vl->plugin_instance);
+ BUFFER_ADD_KEYVAL("type", vl->type);
+ BUFFER_ADD_KEYVAL("type_instance", vl->type_instance);
+
+ if (vl->meta != NULL) {
char meta_buffer[buffer_size];
- memset (meta_buffer, 0, sizeof (meta_buffer));
- status = meta_data_to_json (meta_buffer, sizeof (meta_buffer), vl->meta);
+ memset(meta_buffer, 0, sizeof(meta_buffer));
+ status = meta_data_to_json(meta_buffer, sizeof(meta_buffer), vl->meta);
if (status != 0)
- return (status);
+ return status;
- BUFFER_ADD (",\"meta\":%s", meta_buffer);
+ BUFFER_ADD(",\"meta\":%s", meta_buffer);
} /* if (vl->meta != NULL) */
- BUFFER_ADD ("}");
+ BUFFER_ADD("}");
#undef BUFFER_ADD_KEYVAL
#undef BUFFER_ADD
- DEBUG ("format_json: value_list_to_json: buffer = %s;", buffer);
+ DEBUG("format_json: value_list_to_json: buffer = %s;", buffer);
- return (0);
+ return 0;
} /* }}} int value_list_to_json */
-static int format_json_value_list_nocheck (char *buffer, /* {{{ */
- size_t *ret_buffer_fill, size_t *ret_buffer_free,
- const data_set_t *ds, const value_list_t *vl,
- int store_rates, size_t temp_size)
-{
+static int format_json_value_list_nocheck(char *buffer, /* {{{ */
+ size_t *ret_buffer_fill,
+ size_t *ret_buffer_free,
+ const data_set_t *ds,
+ const value_list_t *vl,
+ int store_rates, size_t temp_size) {
char temp[temp_size];
int status;
- status = value_list_to_json (temp, sizeof (temp), ds, vl, store_rates);
+ status = value_list_to_json(temp, sizeof(temp), ds, vl, store_rates);
if (status != 0)
- return (status);
- temp_size = strlen (temp);
+ return status;
+ temp_size = strlen(temp);
- memcpy (buffer + (*ret_buffer_fill), temp, temp_size + 1);
+ memcpy(buffer + (*ret_buffer_fill), temp, temp_size + 1);
(*ret_buffer_fill) += temp_size;
(*ret_buffer_free) -= temp_size;
- return (0);
+ return 0;
} /* }}} int format_json_value_list_nocheck */
-int format_json_initialize (char *buffer, /* {{{ */
- size_t *ret_buffer_fill, size_t *ret_buffer_free)
-{
+int format_json_initialize(char *buffer, /* {{{ */
+ size_t *ret_buffer_fill, size_t *ret_buffer_free) {
size_t buffer_fill;
size_t buffer_free;
- if ((buffer == NULL) || (ret_buffer_fill == NULL) || (ret_buffer_free == NULL))
- return (-EINVAL);
+ if ((buffer == NULL) || (ret_buffer_fill == NULL) ||
+ (ret_buffer_free == NULL))
+ return -EINVAL;
buffer_fill = *ret_buffer_fill;
buffer_free = *ret_buffer_free;
buffer_fill = 0;
if (buffer_free < 3)
- return (-ENOMEM);
+ return -ENOMEM;
- memset (buffer, 0, buffer_free);
+ memset(buffer, 0, buffer_free);
*ret_buffer_fill = buffer_fill;
*ret_buffer_free = buffer_free;
- return (0);
+ return 0;
} /* }}} int format_json_initialize */
-int format_json_finalize (char *buffer, /* {{{ */
- size_t *ret_buffer_fill, size_t *ret_buffer_free)
-{
+int format_json_finalize(char *buffer, /* {{{ */
+ size_t *ret_buffer_fill, size_t *ret_buffer_free) {
size_t pos;
- if ((buffer == NULL) || (ret_buffer_fill == NULL) || (ret_buffer_free == NULL))
- return (-EINVAL);
+ if ((buffer == NULL) || (ret_buffer_fill == NULL) ||
+ (ret_buffer_free == NULL))
+ return -EINVAL;
if (*ret_buffer_free < 2)
- return (-ENOMEM);
+ return -ENOMEM;
/* Replace the leading comma added in `value_list_to_json' with a square
* bracket. */
if (buffer[0] != ',')
- return (-EINVAL);
+ return -EINVAL;
buffer[0] = '[';
pos = *ret_buffer_fill;
buffer[pos] = ']';
- buffer[pos+1] = 0;
+ buffer[pos + 1] = 0;
(*ret_buffer_fill)++;
(*ret_buffer_free)--;
- return (0);
+ return 0;
} /* }}} int format_json_finalize */
-int format_json_value_list (char *buffer, /* {{{ */
- size_t *ret_buffer_fill, size_t *ret_buffer_free,
- const data_set_t *ds, const value_list_t *vl, int store_rates)
-{
- if ((buffer == NULL)
- || (ret_buffer_fill == NULL) || (ret_buffer_free == NULL)
- || (ds == NULL) || (vl == NULL))
- return (-EINVAL);
+int format_json_value_list(char *buffer, /* {{{ */
+ size_t *ret_buffer_fill, size_t *ret_buffer_free,
+ const data_set_t *ds, const value_list_t *vl,
+ int store_rates) {
+ if ((buffer == NULL) || (ret_buffer_fill == NULL) ||
+ (ret_buffer_free == NULL) || (ds == NULL) || (vl == NULL))
+ return -EINVAL;
if (*ret_buffer_free < 3)
- return (-ENOMEM);
+ return -ENOMEM;
- return (format_json_value_list_nocheck (buffer,
- ret_buffer_fill, ret_buffer_free, ds, vl,
- store_rates, (*ret_buffer_free) - 2));
+ return format_json_value_list_nocheck(buffer, ret_buffer_fill,
+ ret_buffer_free, ds, vl, store_rates,
+ (*ret_buffer_free) - 2);
} /* }}} int format_json_value_list */
-/* vim: set sw=2 sts=2 et fdm=marker : */
+#if HAVE_LIBYAJL
+static int json_add_string(yajl_gen g, char const *str) /* {{{ */
+{
+ if (str == NULL)
+ return (int)yajl_gen_null(g);
+
+ return (int)yajl_gen_string(g, (const unsigned char *)str,
+ (unsigned int)strlen(str));
+} /* }}} int json_add_string */
+
+#define JSON_ADD(g, str) \
+ do { \
+ yajl_gen_status status = json_add_string(g, str); \
+ if (status != yajl_gen_status_ok) { \
+ return -1; \
+ } \
+ } while (0)
+
+#define JSON_ADDF(g, format, ...) \
+ do { \
+ char *str = ssnprintf_alloc(format, __VA_ARGS__); \
+ yajl_gen_status status = json_add_string(g, str); \
+ free(str); \
+ if (status != yajl_gen_status_ok) { \
+ return -1; \
+ } \
+ } while (0)
+
+#define CHECK_SUCCESS(cmd) \
+ do { \
+ yajl_gen_status s = (cmd); \
+ if (s != yajl_gen_status_ok) { \
+ return (int)s; \
+ } \
+ } while (0)
+
+static int format_json_meta(yajl_gen g, notification_meta_t *meta) /* {{{ */
+{
+ if (meta == NULL)
+ return 0;
+
+ JSON_ADD(g, meta->name);
+ switch (meta->type) {
+ case NM_TYPE_STRING:
+ JSON_ADD(g, meta->nm_value.nm_string);
+ break;
+ case NM_TYPE_SIGNED_INT:
+ JSON_ADDF(g, "%" PRIi64, meta->nm_value.nm_signed_int);
+ break;
+ case NM_TYPE_UNSIGNED_INT:
+ JSON_ADDF(g, "%" PRIu64, meta->nm_value.nm_unsigned_int);
+ break;
+ case NM_TYPE_DOUBLE:
+ JSON_ADDF(g, JSON_GAUGE_FORMAT, meta->nm_value.nm_double);
+ break;
+ case NM_TYPE_BOOLEAN:
+ JSON_ADD(g, meta->nm_value.nm_boolean ? "true" : "false");
+ break;
+ default:
+ ERROR("format_json_meta: unknown meta data type %d (name \"%s\")",
+ meta->type, meta->name);
+ CHECK_SUCCESS(yajl_gen_null(g));
+ }
+
+ return format_json_meta(g, meta->next);
+} /* }}} int format_json_meta */
+
+static int format_time(yajl_gen g, cdtime_t t) /* {{{ */
+{
+ char buffer[RFC3339NANO_SIZE] = "";
+
+ if (rfc3339nano(buffer, sizeof(buffer), t) != 0)
+ return -1;
+
+ JSON_ADD(g, buffer);
+ return 0;
+} /* }}} int format_time */
+
+static int format_alert(yajl_gen g, notification_t const *n) /* {{{ */
+{
+ CHECK_SUCCESS(yajl_gen_array_open(g)); /* BEGIN array */
+ CHECK_SUCCESS(yajl_gen_map_open(g)); /* BEGIN alert */
+
+ /*
+ * labels
+ */
+ JSON_ADD(g, "labels");
+ CHECK_SUCCESS(yajl_gen_map_open(g)); /* BEGIN labels */
+
+ JSON_ADD(g, "alertname");
+ if (strncmp(n->plugin, n->type, strlen(n->plugin)) == 0)
+ JSON_ADDF(g, "collectd_%s", n->type);
+ else
+ JSON_ADDF(g, "collectd_%s_%s", n->plugin, n->type);
+
+ JSON_ADD(g, "instance");
+ JSON_ADD(g, n->host);
+
+ /* mangling of plugin instance and type instance into labels is copied from
+ * the Prometheus collectd exporter. */
+ if (strlen(n->plugin_instance) > 0) {
+ JSON_ADD(g, n->plugin);
+ JSON_ADD(g, n->plugin_instance);
+ }
+ if (strlen(n->type_instance) > 0) {
+ if (strlen(n->plugin_instance) > 0)
+ JSON_ADD(g, "type");
+ else
+ JSON_ADD(g, n->plugin);
+ JSON_ADD(g, n->type_instance);
+ }
+
+ JSON_ADD(g, "severity");
+ JSON_ADD(g,
+ (n->severity == NOTIF_FAILURE)
+ ? "FAILURE"
+ : (n->severity == NOTIF_WARNING)
+ ? "WARNING"
+ : (n->severity == NOTIF_OKAY) ? "OKAY" : "UNKNOWN");
+
+ JSON_ADD(g, "service");
+ JSON_ADD(g, "collectd");
+
+ CHECK_SUCCESS(yajl_gen_map_close(g)); /* END labels */
+
+ /*
+ * annotations
+ */
+ JSON_ADD(g, "annotations");
+ CHECK_SUCCESS(yajl_gen_map_open(g)); /* BEGIN annotations */
+
+ JSON_ADD(g, "summary");
+ JSON_ADD(g, n->message);
+
+ if (format_json_meta(g, n->meta) != 0) {
+ return -1;
+ }
+
+ CHECK_SUCCESS(yajl_gen_map_close(g)); /* END annotations */
+
+ JSON_ADD(g, "startsAt");
+ if (format_time(g, n->time) != 0) {
+ return -1;
+ }
+
+ CHECK_SUCCESS(yajl_gen_map_close(g)); /* END alert */
+ CHECK_SUCCESS(yajl_gen_array_close(g)); /* END array */
+
+ return 0;
+} /* }}} format_alert */
+
+/*
+ * Format (prometheus/alertmanager v1):
+ *
+ * [{
+ * "labels": {
+ * "alertname": "collectd_cpu",
+ * "instance": "host.example.com",
+ * "severity": "FAILURE",
+ * "service": "collectd",
+ * "cpu": "0",
+ * "type": "wait"
+ * },
+ * "annotations": {
+ * "summary": "...",
+ * // meta
+ * },
+ * "startsAt": <rfc3339 time>,
+ * "endsAt": <rfc3339 time>, // not used
+ * }]
+ */
+int format_json_notification(char *buffer, size_t buffer_size, /* {{{ */
+ notification_t const *n) {
+ yajl_gen g;
+ unsigned char const *out;
+#if HAVE_YAJL_V2
+ size_t unused_out_len;
+#else
+ unsigned int unused_out_len;
+#endif
+
+ if ((buffer == NULL) || (n == NULL))
+ return EINVAL;
+
+#if HAVE_YAJL_V2
+ g = yajl_gen_alloc(NULL);
+ if (g == NULL)
+ return -1;
+#if COLLECT_DEBUG
+ yajl_gen_config(g, yajl_gen_beautify, 1);
+ yajl_gen_config(g, yajl_gen_validate_utf8, 1);
+#endif
+
+#else /* !HAVE_YAJL_V2 */
+ yajl_gen_config conf = {0};
+#if COLLECT_DEBUG
+ conf.beautify = 1;
+ conf.indentString = " ";
+#endif
+ g = yajl_gen_alloc(&conf, NULL);
+ if (g == NULL)
+ return -1;
+#endif
+
+ if (format_alert(g, n) != 0) {
+ yajl_gen_clear(g);
+ yajl_gen_free(g);
+ return -1;
+ }
+
+ /* copy to output buffer */
+ if (yajl_gen_get_buf(g, &out, &unused_out_len) != yajl_gen_status_ok) {
+ yajl_gen_clear(g);
+ yajl_gen_free(g);
+ return -1;
+ }
+ sstrncpy(buffer, (void *)out, buffer_size);
+
+ yajl_gen_clear(g);
+ yajl_gen_free(g);
+ return 0;
+} /* }}} format_json_notification */
+#else
+int format_json_notification(char *buffer, size_t buffer_size, /* {{{ */
+ notification_t const *n) {
+ ERROR("format_json_notification: Not available (requires libyajl).");
+ return ENOTSUP;
+} /* }}} int format_json_notification */
+#endif
projects / collectd.git / blobdiff