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package chunked
import (
"io"
)
// ImageSourceChunk is a portion of a blob.
type ImageSourceChunk struct {
Offset uint64
Length uint64
}
// ImageSourceSeekable is an image source that permits to fetch chunks of the entire blob.
type ImageSourceSeekable interface {
// GetBlobAt returns a stream for the specified blob.
GetBlobAt([]ImageSourceChunk) (chan io.ReadCloser, chan error, error)
}
// ErrBadRequest is returned when the request is not valid
type ErrBadRequest struct { //nolint: errname
}
func (e ErrBadRequest) Error() string {
return "bad request"
}
// ErrFallbackToOrdinaryLayerDownload is a custom error type that
// suggests to the caller that a fallback mechanism can be used
// instead of a hard failure.
type ErrFallbackToOrdinaryLayerDownload struct {
Err error
}
func (c ErrFallbackToOrdinaryLayerDownload) Error() string {
return c.Err.Error()
}
func (c ErrFallbackToOrdinaryLayerDownload) Unwrap() error {
return c.Err
}
func newErrFallbackToOrdinaryLayerDownload(err error) error {
return ErrFallbackToOrdinaryLayerDownload{Err: err}
}
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