How to use

isKeepAliveDefault

method

in

org.jboss.netty.handler.codec.http.HttpVersion

/**
 * Returns {@code true} if and only if the connection can remain open and
 * thus 'kept alive'.  This methods respects the value of the
 * {@code "Connection"} header first and then the return value of
 * {@link HttpVersion#isKeepAliveDefault()}.
 */
public static boolean isKeepAlive(HttpMessage message) {
  String connection = message.headers().get(Names.CONNECTION);
  boolean close = Values.CLOSE.equalsIgnoreCase(connection);
  if (close) {
    return false;
  }
  if (message.getProtocolVersion().isKeepAliveDefault()) {
    return !close;
  } else {
    return Values.KEEP_ALIVE.equalsIgnoreCase(connection);
  }
}

if (message.getProtocolVersion().isKeepAliveDefault()) {
  if (keepAlive) {
    h.remove(Names.CONNECTION);

/** Handle conditional connection close depending on keep-alive */
private void writeResponse(Channel channel, HttpRequest request, HttpResponse response) {
  response.setHeader(CONTENT_LENGTH, response.getContent().readableBytes());
  boolean hasKeepAliveHeader = KEEP_ALIVE.equalsIgnoreCase(request.getHeader(CONNECTION));
  if (!request.getProtocolVersion().isKeepAliveDefault() && hasKeepAliveHeader) {
    response.setHeader(CONNECTION, KEEP_ALIVE);
  }
  ChannelFuture wf = channel.write(response);
  if (!HttpHeaders.isKeepAlive(request)) {
    wf.addListener(ChannelFutureListener.CLOSE);
  }
}