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/*
* Copyright (C) 2018-2019 "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 <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include "../utils/list.h"
#include "influxdb.h"
#include "tsdb.h"
#include "wrap-json.h"
CTLP_CAPI_REGISTER("influxdb");
CTLP_ONLOAD(plugin, ret)
{
int err = 0;
char* result;
size_t result_size;
CURL* request = curl_wrap_prepare_get(get_url(NULL, NULL, "/ping"), NULL, NULL);
struct reader_args r_args = { NULL, NULL, 1000000 };
plugin->context = (void*)&r_args;
curl_wrap_perform(request, &result, &result_size);
if (curl_wrap_response_code_get(request) != 204) {
AFB_API_ERROR(plugin->api, "InfluxDB not reachable on '%s', please start it", get_url(NULL, NULL, "/ping"));
err = ERROR;
}
curl_easy_cleanup(request);
return err;
}
CTLP_CAPI(influxdb_ping, source, argsJ, eventJ)
{
int ret = 0;
char* result;
size_t result_size;
CURL* curl_req = curl_wrap_prepare_get(get_url(NULL, NULL, "/ping"), NULL, NULL);
curl_wrap_perform(curl_req, &result, &result_size);
if (curl_wrap_response_code_get(curl_req) != 204) {
AFB_API_ERROR(source->api, "InfluxDB is offline.");
ret = ERROR;
} else {
AFB_API_NOTICE(source->api, "InfluxDB is up and running.");
}
curl_easy_cleanup(curl_req);
return ret;
}
size_t make_url(char* url, size_t l_url, const char* host, const char* port, const char* endpoint)
{
bzero(url, l_url);
/* Handle default host and port */
host = host ? host : DEFAULT_DBHOST;
port = port ? port : DEFAULT_DBPORT;
strncat(url, host, l_url - strlen(url) - 1);
strcat(url, ":");
strncat(url, port, l_url - strlen(url) - 1);
if (endpoint[0] != '/') {
strncat(url, "/", l_url - strlen(url) - 1);
}
strncat(url, endpoint, l_url - strlen(url) - 1);
return strlen(url);
}
size_t make_url_db(char* url, size_t l_url, const char* host, const char* port, const char* endpoint, const char* db)
{
size_t sz = make_url(url, l_url, host, port, endpoint);
strncat(url, "?db=", l_url - strlen(url) - 1);
strncat(url, db ? db : DEFAULT_DB, l_url - strlen(url) - 1);
return sz + strlen(db);
}
char* get_url(const char* host, const char* port, const char* endpoint)
{
static char* url = NULL;
static size_t urlSz = 0;
host = host ? host : DEFAULT_DBHOST;
port = port ? port : DEFAULT_DBPORT;
size_t newSz = strlen(host) + 1 + strlen(port) + 1 + strlen(endpoint) + 1;
if (urlSz < newSz) {
url = (char*)realloc(url, newSz);
if (!url) {
return "ERROR, cannot realloc url in get_url";
}
urlSz = newSz;
}
make_url(url, urlSz, host, port, endpoint);
return url;
}
int create_database(afb_req_t request)
{
int ret = 0;
char* result;
size_t result_size;
// Declare query to be posted
const char* post_data[2];
post_data[0] = "q=CREATE DATABASE \"" DEFAULT_DB "\"";
post_data[1] = NULL;
CURL* curl_req = curl_wrap_prepare_post_unescaped(get_url(NULL, NULL, "/query"), NULL, " ", post_data);
curl_wrap_perform(curl_req, &result, &result_size);
if (curl_wrap_response_code_get(request) != 200) {
AFB_REQ_ERROR(request, "Can't create database.");
ret = ERROR;
}
curl_easy_cleanup(curl_req);
if (ret == 0)
AFB_REQ_NOTICE(request, "Database '" DEFAULT_DB "' created");
return ret;
}
void unpack_values(void* l, json_object* valuesJ, const char* key)
{
add_elt((struct list**)l, key, "", valuesJ);
}
void unpack_metadata(void* l, json_object* valuesJ, const char* key)
{
add_elt((struct list**)l, key, "", valuesJ);
}
void unpacking_from_api(void* s, json_object* valueJ, const char* key)
{
size_t key_length = strlen(key);
struct series_t* serie = (struct series_t*)s;
/* Treat the 2 static key that could have been specified */
if (strcasecmp("name", key) == 0)
serie->name = json_object_get_string(valueJ);
else if (strcasecmp("timestamp", key) == 0)
serie->timestamp = (json_object_is_type(valueJ, json_type_int)) ? json_object_get_int64(valueJ) : 0;
// metadata (AKA tags) are indexed into influxdb
else if (strcasecmp("metadata", key) == 0)
wrap_json_object_for_all(valueJ, unpack_metadata, (void*)&serie->serie_columns.tags);
// value (AKA fields) are NOT indexed into influxdb
else if (strcasecmp("value", key) == 0 || strcasecmp("values", key) == 0)
wrap_json_object_for_all(valueJ, unpack_values, (void*)&serie->serie_columns.fields);
/* Treat all key looking for tag and field object. Those ones could be find
with the last 2 character. '_t' for tag and '_f' that are the keys that
could be indefinite. Cf influxdb documentation:
https://docs.influxdata.com/influxdb/v1.5/write_protocols/line_protocol_reference/ */
else if (strncasecmp(&key[key_length - 2], "_t", 2) == 0)
add_elt(&serie->serie_columns.tags, key, "", valueJ);
else if (strncasecmp(&key[key_length - 2], "_f", 2) == 0)
add_elt(&serie->serie_columns.fields, key, "", valueJ);
}
int unpack_metric_from_api(json_object* m, struct series_t* serie)
{
wrap_json_object_for_all(m, unpacking_from_api, serie);
if (!serie->timestamp) {
serie->timestamp = get_ts();
}
return 0;
}
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