BufferedReader reader = new BufferedReader(new InputStreamReader(
url.openStream()));
reader.mark(100);
String line = reader.readLine();
if (line.equals(NO_TOKEN)) {
throw new NoSybosTokenException();
}
Matcher wtMatcher = WRONG_TOKEN.matcher(line);
if (wtMatcher.matches()) {
throw new WrongSybosTokenException(wtMatcher.group(1));
}