| 7 | ) |
| 8 | |
| 9 | func CopyWithFirstReadChan(firstReadDone chan struct{}) func(io.Writer, io.Reader) (int64, error) { |
| 10 | return func(dst io.Writer, src io.Reader) (written int64, err error) { |
| 11 | buf := make([]byte, 2*1024) |
| 12 | for { |
| 13 | nr, er := src.Read(buf) |
| 14 | select { |
| 15 | case <-firstReadDone: |
| 16 | default: |
| 17 | close(firstReadDone) |
| 18 | // HACK: let the close hook of the spinner |
| 19 | time.Sleep(100 * time.Millisecond) |
| 20 | } |
| 21 | if nr > 0 { |
| 22 | nw, ew := dst.Write(buf[0:nr]) |
| 23 | if nw > 0 { |
| 24 | written += int64(nw) |
| 25 | } |
| 26 | if ew != nil { |
| 27 | err = ew |
| 28 | break |
| 29 | } |
| 30 | if nr != nw { |
| 31 | err = io.ErrShortWrite |
| 32 | break |
| 33 | } |
| 34 | } |
| 35 | if er == io.EOF { |
| 36 | break |
| 37 | } |
| 38 | if er != nil { |
| 39 | err = er |
| 40 | break |
| 41 | } |
| 42 | } |
| 43 | return written, err |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | func CopyWithTimeout(timeout time.Duration) func(io.Writer, io.Reader) (int64, error) { |
| 48 | return func(dst io.Writer, src io.Reader) (written int64, err error) { |