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/**
* collectd - src/utils_format_influxdb.c
* Copyright (C) 2007-2009 Florian octo Forster
* Copyright (C) 2009 Aman Gupta
* Copyright (C) 2019 Carlos Peon Costa
*
* 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
* Free Software Foundation; only version 2 of the License is applicable.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* Authors:
* Florian octo Forster <octo at collectd.org>
* Aman Gupta <aman at tmm1.net>
* Carlos Peon Costa <carlospeon at gmail.com>
* multiple Server directives by:
* Paul (systemcrash) <newtwen thatfunny_at_symbol gmail.com>
**/
#include "format_influxdb.h"
#include "collectd.h"
#include "plugin.h"
#include "utils/common/common.h"
#include "utils/metadata/meta_data.h"
#include "utils_cache.h"
static int format_influxdb_escape_string(char *buffer, size_t buffer_size,
const char *string) {
if ((buffer == NULL) || (string == NULL)) return -EINVAL;
if (buffer_size < 3) return -ENOMEM;
int 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)
/* Escape special characters */
for (int src_pos = 0; string[src_pos] != 0; src_pos++) {
if ((string[src_pos] == '\\') || (string[src_pos] == ' ') ||
(string[src_pos] == ',') || (string[src_pos] == '=') ||
(string[src_pos] == '"')) {
BUFFER_ADD('\\');
BUFFER_ADD(string[src_pos]);
} else
BUFFER_ADD(string[src_pos]);
} /* for */
buffer[dst_pos] = 0;
#undef BUFFER_ADD
return dst_pos;
} /* int format_influxdb_escape_string */
int format_influxdb_value_list(
char *buffer, int buffer_len, const data_set_t *ds, const value_list_t *vl,
bool store_rates, format_influxdb_time_precision_t time_precision) {
int status;
int offset = 0;
gauge_t *rates = NULL;
bool have_values = false;
assert(0 == strcmp(ds->type, vl->type));
#define BUFFER_ADD_ESCAPE(...) \
do { \
status = format_influxdb_escape_string(buffer + offset, \
buffer_len - offset, __VA_ARGS__); \
if (status < 0) return status; \
offset += status; \
} while (0)
#define BUFFER_ADD(...) \
do { \
status = snprintf(buffer + offset, buffer_len - offset, __VA_ARGS__); \
if ((status < 0) || (status >= (buffer_len - offset))) { \
sfree(rates); \
return -ENOMEM; \
} \
offset += status; \
} while (0)
assert(vl->type);
BUFFER_ADD_ESCAPE(vl->type);
BUFFER_ADD(",host=");
BUFFER_ADD_ESCAPE(vl->host);
if (vl->meta) {
char **toc;
int n = meta_data_toc(vl->meta, &toc);
for (int i = 0; i < n; i++) {
char *key = toc[i];
char *value;
if (meta_data_as_string(vl->meta, key, &value) == 0) {
BUFFER_ADD(",");
BUFFER_ADD_ESCAPE(key);
BUFFER_ADD("=");
BUFFER_ADD_ESCAPE(value);
free(value);
}
free(toc[i]);
}
if (n != 0) free(toc);
}
BUFFER_ADD(" ");
for (size_t i = 0; i < ds->ds_num; i++) {
if ((ds->ds[i].type != DS_TYPE_COUNTER) &&
(ds->ds[i].type != DS_TYPE_GAUGE) &&
(ds->ds[i].type != DS_TYPE_DERIVE) &&
(ds->ds[i].type != DS_TYPE_ABSOLUTE)) {
sfree(rates);
return -EINVAL;
}
if (ds->ds[i].type == DS_TYPE_GAUGE) {
if (isnan(vl->values[i].gauge)) continue;
if (have_values) BUFFER_ADD(",");
BUFFER_ADD("%s=%lf", ds->ds[i].name, vl->values[i].gauge);
have_values = true;
} else if (store_rates) {
if (rates == NULL) rates = uc_get_rate(ds, vl);
if (rates == NULL) {
WARNING(
"format_influxdb: "
"uc_get_rate failed.");
return -EINVAL;
}
if (isnan(rates[i])) continue;
if (have_values) BUFFER_ADD(",");
BUFFER_ADD("%s=%lf", ds->ds[i].name, rates[i]);
have_values = true;
} else if (ds->ds[i].type == DS_TYPE_COUNTER) {
if (have_values) BUFFER_ADD(",");
BUFFER_ADD("%s=%" PRIu64 "i", ds->ds[i].name,
(uint64_t)vl->values[i].counter);
have_values = true;
} else if (ds->ds[i].type == DS_TYPE_DERIVE) {
if (have_values) BUFFER_ADD(",");
BUFFER_ADD("%s=%" PRIi64 "i", ds->ds[i].name, vl->values[i].derive);
have_values = true;
} else if (ds->ds[i].type == DS_TYPE_ABSOLUTE) {
if (have_values) BUFFER_ADD(",");
BUFFER_ADD("%s=%" PRIu64 "i", ds->ds[i].name, vl->values[i].absolute);
have_values = true;
}
} /* for ds->ds_num */
sfree(rates);
if (!have_values) return 0;
uint64_t influxdb_time = 0;
switch (time_precision) {
case NS:
influxdb_time = CDTIME_T_TO_NS(vl->time);
break;
case US:
influxdb_time = CDTIME_T_TO_US(vl->time);
break;
case MS:
influxdb_time = CDTIME_T_TO_MS(vl->time);
break;
}
BUFFER_ADD(" %" PRIu64 "\n", influxdb_time);
#undef BUFFER_ADD_ESCAPE
#undef BUFFER_ADD
return offset;
} /* int format_influxdb_value_list */
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