nexus-disable-remote.java

public Content get(final Context context) throws IOException {
  Content content = maybeGetCachedContent(context);
  
  Request request = context.getRequest();
  if (request != null && request.getHeaders() != null && request.getHeaders().get("User-Agent") != null &&
          request.getHeaders().get("User-Agent").startsWith("Nexus/")) {
    request.getAttributes().set("DisableNegativeCache", true);
    return null;
  }

  return doGet(context, content);
}