URI wsuri = new URI(requestURI);
if (!wsuri.isAbsolute()) {
// Netty requires an absolute url
wsuri = new URI((ssl ? "https:" : "http:") + "//" + host + ":" + port + requestURI);
}
WebSocketVersion version =
WebSocketVersion.valueOf((vers == null ?
WebSocketVersion.V13 : vers).toString());
HttpHeaders nettyHeaders;
if (headers != null) {
nettyHeaders = new DefaultHttpHeaders();