Get presigned url AWS S3 (private file)

GetPresignedUrl.go

func GetPresignedUrl(file string) (string, error) {
	req, _ := S3Client.GetObjectRequest(&s3.GetObjectInput{
		Bucket:                     aws.String(config.S3.Bucket),
		Key:                        aws.String(file),
		ResponseContentDisposition: aws.String("attachment; filename=\"" + filepath.Base(file) + "\""), // to make sure the file is automatically downloaded
	})
	return req.Presign(config.S3.PresignDuration) // time.Duration
}