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/*
* Copyright (C) 2015, 2016, 2017, 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 <stdio.h>
#include <string.h>
#include "influxdb.h"
size_t format_write_args(char *query, const char *name, const char *source, const char *unit, const char *identity, json_object *jv, uint64_t timestamp)
{
char *ts;
memset(query, 0, URL_MAXIMUM_LENGTH);
strncat(query, name, strlen(name));
if (source) {
concatenate(query, source, ",");
}
if (unit) {
concatenate(query, unit, ",");
}
if (identity) {
concatenate(query, identity, ",");
}
concatenate(query, "value", " ");
concatenate(query, json_object_to_json_string(jv), "=");
asprintf(&ts, "%lu", timestamp);
concatenate(query, ts, " ");
return strlen(query);
}
CURL *make_curl_write_post(const char *url, json_object *metric)
{
CURL *curl;
json_object *jv = NULL;
uint64_t timestamp = 0;
const char *name = NULL,
*source = NULL,
*unit = NULL,
*identity = NULL;
size_t lpd = json_object_is_type(metric, json_type_array) ?
json_object_array_length(metric) + 1 : 2;
char **post_data;
post_data = malloc(lpd);
char write[URL_MAXIMUM_LENGTH];
bzero(write, URL_MAXIMUM_LENGTH);
if(unpack_metric_from_binding(metric, &name, &source, &unit, &identity, &jv, ×tamp)) {
AFB_ERROR("ERROR unpacking metric. %s", json_object_to_json_string(metric));
curl = NULL;
}
else {
for(long int i = --lpd; i >= 0; i--) {
format_write_args(write, name, source, unit, identity, jv, timestamp);
post_data[i] = i == lpd ? NULL : write;
}
curl = curl_wrap_prepare_post(url, NULL, 1, (const char * const*)post_data);
}
free(post_data);
return curl;
}
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 *influxdb_write(const char* host, const char *port, json_object *metric)
{
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, metric);
}
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