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/*
* Copyright (C) 2018 "IoT.bzh"
* Author "Romain Forlot" <romain.forlot@iot.bzh>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define _GNU_SOURCE
#include <string.h>
#include <stdio.h>
#include "influxdb.h"
static size_t format_write_args(char *query, struct series_t *serie)
{
char *ts;
struct list *tags = serie->serie_columns.tags;
struct list *fields = serie->serie_columns.fields;
strncat(query, serie->name, strlen(serie->name));
if(tags) {
while(tags != NULL) {
concatenate(query, tags->key, ",");
if(json_object_is_type(tags->value, json_type_string))
concatenate(query, json_object_get_string(tags->value), "=");
else
concatenate(query, json_object_to_json_string(tags->value), "=");
tags = tags->next;
}
}
if(fields) {
int i = 0;
for(struct list *it = fields; it != NULL; it = it->next) {
if(!i)
concatenate(query, fields->key, " ");
else
concatenate(query, fields->key, ",");
if(json_object_is_type(fields->value, json_type_string))
concatenate(query, json_object_get_string(fields->value), "=");
else
concatenate(query, json_object_to_json_string(fields->value), "=");
i++;
}
}
asprintf(&ts, "%lu", serie->timestamp);
concatenate(query, ts, " ");
strcat(query, "\n");
return strlen(query);
}
void influxdb_write_curl_cb(void *closure, int status, CURL *curl, const char *result, size_t size)
{
struct afb_req *req = (struct afb_req*)closure;
long rep_code = curl_wrap_response_code_get(curl);
switch(rep_code) {
case 204:
AFB_DEBUG("Request correctly written");
afb_req_success(*req, NULL, "Request has been successfully writen");
break;
case 400:
afb_req_fail(*req, "Bad request", result);
break;
case 401:
afb_req_fail(*req, "Unauthorized access", result);
break;
case 404:
afb_req_fail(*req, "Not found", result);
AFB_NOTICE("Attempt to create the DB '"DEFAULT_DB"'");
create_database();
break;
case 500:
afb_req_fail_f(*req, "Timeout", "Overloaded server: %s", result);
break;
default:
afb_req_fail(*req, "Failure", "Unexpected behavior.");
break;
}
}
CURL *make_curl_write_post(const char *url, json_object *metricsJ)
{
CURL *curl = NULL;
size_t lpd = 0, i = 0;
char **post_data;
char write[URL_MAXIMUM_LENGTH];
struct series_t *serie = NULL;
json_object *metricsArrayJ = NULL;
if(json_object_is_type(metricsJ, json_type_array)) {
lpd = json_object_array_length(metricsJ);
metricsArrayJ = metricsJ;
}
else {
metricsArrayJ = json_object_new_array();
json_object_array_add(metricsArrayJ, metricsJ);
lpd = 1;
}
serie = malloc(sizeof(struct series_t));
post_data = malloc(lpd);
for(i = 0; i < lpd; i++) {
bzero(serie, sizeof(struct series_t));
if(unpack_metric_from_api(json_object_array_get_idx(metricsArrayJ, i), serie)) {
AFB_ERROR("ERROR unpacking metric. %s", json_object_to_json_string(metricsArrayJ));
break;
}
else {
bzero(write, URL_MAXIMUM_LENGTH);
if(! serie->name) {
post_data[i] = NULL;
}
else {
format_write_args(write, serie);
strcpy(post_data[i], write);
}
}
}
post_data[i] = NULL;
/* Check that we just do not broke the for loop before trying preparing CURL
request object */
curl = i == lpd ?
curl_wrap_prepare_post_binary(url, NULL, " ", (const char * const*)post_data) : NULL;
free(serie);
free(post_data);
return curl;
}
CURL *influxdb_write(const char* host, const char *port, json_object *metricJ)
{
char url[URL_MAXIMUM_LENGTH]; /* Safe limit for most popular web browser */
make_url(url, sizeof(url), host, port, "write");
return make_curl_write_post(url, metricJ);
}
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