private long getContentLength(HttpMessage message, int defaultValue) {
   String value = message.getHeader("Content-Length");
   if (FastIntegerParser.isNumber(value)) {
     return FastIntegerParser.parseLong(value);
   }
   return defaultValue;
 }
 private long getContentLength(HttpMessage message) {
   return FastIntegerParser.parseInt(message.getHeader("Content-Length"));
 }