code: func CreateBatchUploadHandler(storage blobserver.BlobReceiveConfiger) http.Handler {
  	return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
  		handleMultiPartUpload(rw, req, storage)
  	})
  }
docs: // CreateBatchUploadHandler returns the handler that receives multi-part form uploads
  // to upload many blobs at once. See doc/protocol/blob-upload-protocol.txt.