main.go

package main

import (
	"fmt"
	"log"
	"net/http"
	"os"
)

func GetFilePath(url string) (string, error) {

	return "image.jpg", nil
}

func Download(urls []string) (downloaded, failed []string) {

	for _, url := range urls {
		filepath, err := GetFilePath(url)
		if err != nil {
			failed = append(failed, url)
			log.Debugf("Can't get file path")
		}
		err = DownloadFile(filepath, url)
		if err != nil {
			failed = append(failed, url)
		}
		downloaded = append(downloaded, url)
	}
}

func main() {
	// download images and print results
	urls := []string{
		"https://static.vinepair.com/wp-content/uploads/2019/10/HopTake-Oct17-Header.jpg",
		"https://static.turbosquid.com/Preview/001209/767/QP/3D-model-beer-pack-corona_Z.jpg",
		"https://static.turosquid.com/Preview/001209/767/QP/3D-model-beer-pack-corona_Z.jpg",
	}
	downloaded, failed := Download(urls)
	fmt.Printf("Downloaded: %v\n Failed: %v", downloaded, failed)
}

func DownloadFile(filepath string, url string) error {

	resp, err := http.Get(url)
	if resp != nil {
		defer resp.Body.Close()
	}

	if err != nil {
		log.Errorf("Can't get file with the following url %s due the error: %s", url, err)
		return err
	}

	out, err := os.Create(filepath)
	if err != nil {
		log.Errorf(
			"Can't create file by the following path %s due the error: %s",
			filepath, err)
		return err
	}
	defer out.Close()

	_, err = io.Copy(out, resp.Body)
	if err != nil {
		log.Errorf(
			"Can't write file content for %s url by the following %s path due the error: %s",
			url, filepath, err)
		return err
	}

	return nil
}