if err != nil {
				err = msgp.WrapError(err, "ContentType")
				return
			}
		case "ContentEncoding":
			z.ContentEncoding, bts, err = msgp.ReadStringBytes(bts)
			if err != nil {
				err = msgp.WrapError(err, "ContentEncoding")
				return
			}
		case "Expires":
			z.Expires, bts, err = msgp.ReadTimeBytes(bts)
			if err != nil {

	req, err := newTestStreamingRequest(method, urlStr, contentLength, chunkSize, body)
	if err != nil {
		return nil, err
	}

	// Set custom encoding.
	req.Header.Set("content-encoding", contentEncoding)

	currTime := UTCNow()

	for k, v := range objInfo.Metadata {
		oi.UserDefined[k] = v[0]
	}

	ce, ok := oi.UserDefined[xhttp.ContentEncoding]
	if !ok {
		ce, ok = oi.UserDefined[strings.ToLower(xhttp.ContentEncoding)]
	}
	if ok {
		oi.ContentEncoding = ce
	}

	_, ok = oi.UserDefined[xhttp.AmzStorageClass]
	if !ok {
		oi.UserDefined[xhttp.AmzStorageClass] = objInfo.StorageClass
	}