client_prom_http.go

// -*- coding: utf-8 -*-
//
// © Copyright 2023 GSI Helmholtzzentrum für Schwerionenforschung
//
// This software is distributed under
// the terms of the GNU General Public Licence version 3 (GPL Version 3),
// copied verbatim in the file "LICENCE".

package main

import (
	"io/ioutil"
	"net/http"
	"time"

	log "github.com/sirupsen/logrus"
)

func httpRequest(url string, requestTimeout int) (*[]byte, error) {

	var client = http.Client{Timeout: time.Second * time.Duration(requestTimeout)}

	log.Debug("Trying HTTP request for URL on Prometheus server: ", url)

	req, err := http.NewRequest(http.MethodGet, url, nil)
	if err != nil {
		log.Fatal(err)
	}

	res, err := client.Do(req)
	if err != nil {
		return nil, err
	}

	if res.Body != nil {
		defer res.Body.Close()
	}

	body, err := ioutil.ReadAll(res.Body)
	if err != nil {
		return nil, err
	}

	return &body, nil
}