Method CacheFullAndWriter

internal/model/obj.go:50–50

for a non-seekable Stream, if Read is called, this function won't work. caches the full Stream and writes it to writer (if provided, even if the stream is already cached).

(up *UpdateProgress, writer io.Writer)

	// for a non-seekable Stream, if Read is called, this function won't work.
	// caches the full Stream and writes it to writer (if provided, even if the stream is already cached).
	CacheFullAndWriter(up *UpdateProgress, writer io.Writer) (File, error)
	// if the Stream is not a File and is not cached, returns nil.
	GetFile() File
}