importer

type Importer struct {
	// Target is the blobserver to populate.
	Target blobserver.StatReceiver

	// ProgressChan optionally specifies a channel to receive
	// progress messages of various types.  The types sent may be:
	//   - *ProgressMessage
	//   - *NewPermanodeMessage
	ProgressChan chan<- interface{}

	// Client optionally specifies how to fetch external network
	// resources.  If nil, http.DefaultClient is used.
	Client *http.Client
}

type Parser interface {
	CanHandleURL(url string) YesNoMaybe
	CanHandleResponse(res *http.Response) bool
	Import(im *Importer) error
}

type ProgressMessage struct {
	ItemsDone, ItemsTotal int
	BytesDone, BytesTotal int64
}

type YesNoMaybe int