Пример #1
0
// URLFor returns a URL which may be used to retrieve the content stored at the given path.
// May return an UnsupportedMethodErr in certain StorageDriver implementations.
func (d *driver) URLFor(ctx context.Context, path string, options map[string]interface{}) (string, error) {
	methodString := "GET"
	method, ok := options["method"]
	if ok {
		methodString, ok = method.(string)
		if !ok || (methodString != "GET" && methodString != "HEAD") {
			return "", storagedriver.ErrUnsupportedMethod{}
		}
	}

	expiresIn := 20 * time.Minute
	expires, ok := options["expiry"]
	if ok {
		et, ok := expires.(time.Time)
		if ok {
			expiresIn = et.Sub(time.Now())
		}
	}

	var req *request.Request

	switch methodString {
	case "GET":
		req, _ = d.S3.GetObjectRequest(&s3.GetObjectInput{
			Bucket: aws.String(d.Bucket),
			Key:    aws.String(d.s3Path(path)),
		})
	case "HEAD":
		req, _ = d.S3.HeadObjectRequest(&s3.HeadObjectInput{
			Bucket: aws.String(d.Bucket),
			Key:    aws.String(d.s3Path(path)),
		})
	default:
		panic("unreachable")
	}

	return req.Presign(expiresIn)
}