@Override
protected void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {
FullHttpRequest req = (FullHttpRequest) msg;
String upgrade = req.headers().get(HttpHeaders.Names.UPGRADE);
if (HttpHeaders.Values.WEBSOCKET.equalsIgnoreCase(upgrade)) {
WebSocketServerHandshakerFactory wsFactory =
new WebSocketServerHandshakerFactory(req.getUri(), null, false);
WebSocketServerHandshaker handshaker = wsFactory.newHandshaker(req);
if (handshaker == null) {
WebSocketServerHandshakerFactory.sendUnsupportedWebSocketVersionResponse(ctx.channel());
} else {
ChannelFuture future = handshaker.handshake(ctx.channel(), req);
future.addListener(
f -> {
this.configurator.switchToWebSockets(ctx.pipeline());
});
}
} else {
ReferenceCountUtil.retain(msg);
this.configurator.switchToPlainHttp(ctx.pipeline());
ChannelHandlerContext agg = ctx.pipeline().context(HttpObjectAggregator.class);
agg.fireChannelRead(msg);
}
}
public static ChannelFuture handshake(
final ChannelHandlerContext ctx,
final HttpRequest request,
final String websocketPath,
final ChannelHandler handler) {
final String connHead = request.getHttpHeaders().getHeaderString(HttpHeaders.Names.CONNECTION);
final String upHead = request.getHttpHeaders().getHeaderString(HttpHeaders.Names.UPGRADE);
final String sockHead =
request.getHttpHeaders().getHeaderString(HttpHeaders.Names.SEC_WEBSOCKET_VERSION);
final String keyHead =
request.getHttpHeaders().getHeaderString(HttpHeaders.Names.SEC_WEBSOCKET_KEY);
try {
DefaultHttpRequest req =
new DefaultHttpRequest(
HttpVersion.HTTP_1_0, HttpMethod.GET, request.getUri().getAbsolutePath().toString());
req.setHeader(HttpHeaders.Names.SEC_WEBSOCKET_VERSION, sockHead);
req.setHeader(HttpHeaders.Names.SEC_WEBSOCKET_KEY, keyHead);
final Channel channel = ctx.channel();
final String location = getWebSocketLocation(channel.pipeline(), request, websocketPath);
final WebSocketServerHandshakerFactory wsFactory =
new WebSocketServerHandshakerFactory(location, null, false);
final WebSocketServerHandshaker handshaker = wsFactory.newHandshaker(req);
if (handshaker == null) {
WebSocketServerHandshakerFactory.sendUnsupportedWebSocketVersionResponse(channel);
return null;
} else if (!connHead.toLowerCase().contains(HttpHeaders.Values.UPGRADE.toLowerCase())
|| !upHead.toLowerCase().contains(HttpHeaders.Values.WEBSOCKET.toLowerCase())) {
// Not a valid socket open request
logger.info("Invalid request: " + request.getUri());
return null;
} else {
// We need to remove the RESTEasy stuff otherwise the Netty logic to write the handshake to
// the channel
// will never make it back to the client
channel.pipeline().remove("resteasyEncoder");
channel.pipeline().remove("resteasyDecoder");
final ChannelFuture handshakeFuture = handshaker.handshake(channel, req);
handshakeFuture.addListener(
new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future) throws Exception {
if (!future.isSuccess()) {
ctx.fireExceptionCaught(future.cause());
} else {
final ChannelPipeline pipeline = future.channel().pipeline();
pipeline.replace(pipeline.last(), "customSocketHandler", handler);
pipeline.addBefore(
"customSocketHandler", "socketHandler", new WebSocketProtocolHandler());
}
}
});
WebSocketProtocolHandler.setHandshaker(ctx, handshaker);
return handshakeFuture;
// channel.pipeline().addBefore("timeout", "WS403Responder",
// WebSocketProtocolHandler.forbiddenHttpRequestResponder());
}
} catch (Exception e) {
logger.error("Error trying to upgrade the channel to a socket", e);
}
return null;
}