Esempio n. 1
0
func (rx *ResumableUpload) transferChunks(ctx context.Context) (*http.Response, error) {
	var start int64
	var err error
	res := &http.Response{}
	if rx.started {
		start, res, err = rx.transferStatus(ctx)
		if err != nil || res.StatusCode != statusResumeIncomplete {
			return res, err
		}
	}
	rx.started = true

	for {
		select { // Check for cancellation
		case <-ctx.Done():
			res.StatusCode = http.StatusRequestTimeout
			return res, ctx.Err()
		default:
		}
		reqSize := rx.ContentLength - start
		if reqSize > chunkSize {
			reqSize = chunkSize
		}
		r := io.NewSectionReader(rx.Media, start, reqSize)
		req, _ := http.NewRequest("POST", rx.URI, r)
		req.ContentLength = reqSize
		req.Header.Set("Content-Range", fmt.Sprintf("bytes %v-%v/%v", start, start+reqSize-1, rx.ContentLength))
		req.Header.Set("Content-Type", rx.MediaType)
		req.Header.Set("User-Agent", rx.UserAgent)
		res, err = ctxhttp.Do(ctx, rx.Client, req)
		start += reqSize
		if err == nil && (res.StatusCode == statusResumeIncomplete || res.StatusCode == http.StatusOK) {
			rx.mu.Lock()
			rx.progress = start // keep track of number of bytes sent so far
			rx.mu.Unlock()
			if rx.Callback != nil {
				rx.Callback(start, rx.ContentLength)
			}
		}
		if err != nil || res.StatusCode != statusResumeIncomplete {
			break
		}
	}
	return res, err
}
Esempio n. 2
0
func (rx *ResumableUpload) transferStatus(ctx context.Context) (int64, *http.Response, error) {
	req, _ := http.NewRequest("POST", rx.URI, nil)
	req.ContentLength = 0
	req.Header.Set("User-Agent", rx.UserAgent)
	req.Header.Set("Content-Range", fmt.Sprintf("bytes */%v", rx.ContentLength))
	res, err := ctxhttp.Do(ctx, rx.Client, req)
	if err != nil || res.StatusCode != statusResumeIncomplete {
		return 0, res, err
	}
	var start int64
	if m := rangeRE.FindStringSubmatch(res.Header.Get("Range")); len(m) == 2 {
		start, err = strconv.ParseInt(m[1], 10, 64)
		if err != nil {
			return 0, nil, fmt.Errorf("unable to parse range size %v", m[1])
		}
		start += 1 // Start at the next byte
	}
	return start, res, nil
}