Retrieve a file from offset?

[itsjwala]

can this feature be supported where user can specify from where to read?

Current :-

func (c *Client) Retrieve(path string, dest io.Writer) error {

Need :-

func (c *Client) RetrieveFrom(path string, dest io.Writer,bytesSoFar int64) error {

[muirmanders]

What if Retrieve checks if dest is an io.Seeker and if so sets bytesSoFar to the current offset? Or we could add a wrapper type to make this behavior opt-in:

type ResumingWriter struct {
  io.Seeker
}

c.Retreieve(path, &ResumingWriter{myFile})

[itsjwala]

Both will do, its just first one would be more clear. Adding a new function if dest is io.Seeker read from that offset. And current func Retrieve can delegate the call to this new function with offset 0