private static InetAddress getExternalAddressOfLocalSystem()

in java/io/bazel/rules/closure/webfiles/server/NetworkUtils.java [104:130]

• 25 lines of code
• 9 McCabe index (conditional complexity)

  private static InetAddress getExternalAddressOfLocalSystem() throws UnknownHostException {
    InetAddress localhost = InetAddress.getLocalHost();
    // If we have a loopback address, look for an address using the network cards.
    if (localhost.isLoopbackAddress()) {
      try {
        Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
        if (interfaces == null) {
          return localhost;
        }
        while (interfaces.hasMoreElements()) {
          NetworkInterface networkInterface = interfaces.nextElement();
          Enumeration<InetAddress> addresses = networkInterface.getInetAddresses();
          while (addresses.hasMoreElements()) {
            InetAddress address = addresses.nextElement();
            if (!(address.isLoopbackAddress()
                || address.isLinkLocalAddress()
                || address instanceof Inet6Address)) {
              return address;
            }
          }
        }
      } catch (SocketException e) {
        // Fall-through.
      }
    }
    return localhost;
  }