getErrorNumber static method

int getErrorNumber(
  1. List<int> message
)

get the message error number if message is an error.

Implementation

static int getErrorNumber(List<int> message) {
  if (message.length > 1) {
    if (message[0] == SocketHelper._upgradeHeader) return 0;
    var error = message[1];
    if ((((error & 0xFF) << 4) & 0xFF) > 0) return 0;
    return (error & 0xFF) >> 4;
  }
  return 0;
}