Method Upload

pkg/client/upload.go:251–432

Upload uploads a blob, as described by the provided UploadHandle parameters.

(ctx context.Context, h *UploadHandle)

// Upload uploads a blob, as described by the provided UploadHandle parameters.
func (c *Client) Upload(ctx context.Context, h *UploadHandle) (*PutResult, error) {
	errorf := func(msg string, arg ...interface{}) (*PutResult, error) {
		err := fmt.Errorf(msg, arg...)
		c.printf("%v", err)
		return nil, err
	}

	bodyReader, bodySize, err := h.readerAndSize()
	if err != nil {
		return nil, fmt.Errorf("client: error slurping upload handle to find its length: %v", err)
	}
	if bodySize > constants.MaxBlobSize {
		return nil, errors.New("client: body is bigger then max blob size")
	}

	c.statsMutex.Lock()
	c.stats.UploadRequests.Blobs++
	c.stats.UploadRequests.Bytes += bodySize
	c.statsMutex.Unlock()

	pr := &PutResult{BlobRef: h.BlobRef, Size: uint32(bodySize)}

	if c.sto != nil {
		// TODO: stat first so we can show skipped?
		_, err := blobserver.Receive(ctx, c.sto, h.BlobRef, bodyReader)
		if err != nil {
			return nil, err
		}
		return pr, nil
	}

	if !h.Vivify {
		if _, ok := c.haveCache.StatBlobCache(h.BlobRef); ok {
			pr.Skipped = true
			return pr, nil
		}
	}

	blobrefStr := h.BlobRef.String()

	// Pre-upload. Check whether the blob already exists on the
	// server and if not, the URL to upload it to.
	pfx, err := c.prefix()
	if err != nil {
		return nil, err
	}

	if !h.SkipStat {
		url_ := fmt.Sprintf("%s/camli/stat", pfx)
		req := c.newRequest(ctx, "POST", url_, strings.NewReader("camliversion=1&blob1="+blobrefStr))
		req.Header.Add("Content-Type", "application/x-www-form-urlencoded")

		resp, err := c.doReqGated(req)
		if err != nil {
			return errorf("stat http error: %w", err)
		}
		defer resp.Body.Close()