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