conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setFixedLengthStreamingMode(bc.byteLength());
conn = initRequest("PUT", conn, path, timeoutMsecs);
out = conn.getOutputStream();
bc.writeBytes(out);
} else {
InputStream in; // closed in copy()
File f = content.contentAsFile();
// !!! TODO: add wrapper for calculating hash sum, if not yet calculated
if (f != null) {