func sendFile(conn io.ReadWriter, f io.Reader, size int64) error {
err := util.WriteInt64(conn, size)
if err != nil {
return err
}
n, err := io.CopyN(conn, f, size)
if err != nil {
return err
}
if n != size {
return fmt.Errorf("copy failed part way through, %v/%v", n, size)
}
nack, err := util.ReadInt64(conn)
if err != nil {
return err
}
if n != nack {
return fmt.Errorf("ack was incorrect, expected %v, got %v", n, nack)
}
return nil
}
func recvFile(conn io.ReadWriter, f io.Writer) error {
n, err := util.ReadInt64(conn)
if err != nil {
return err
}
nact, err := io.CopyN(f, conn, n)
if err != nil {
return err
}
if n != nact {
return fmt.Errorf("ack was incorrect, expected %v, got %v", n, nact)
}
err = util.WriteInt64(conn, nact)
if err != nil {
return err
}
return nil
}