CodecException: invalid WebSocket Extension handshake for "permessage-deflate; client_no_context_takeover" about xchange-stream HOT 3 CLOSED

I don't know a ton about what's actually going on in the underlying connections, but I encountered this error too and was able to get around it. GDAX apparently has very specific connection requirements, so it defines a WebSocketClientCompressionAllowClientNoContextHandler . In the connect() method in NettyStreamingService.java, the following lines add handlers to the channel:

WebSocketClientExtensionHandler clientExtensionHandler =
getWebSocketClientExtensionHandler();
List<ChannelHandler> handlers = new ArrayList<>(4);
handlers.add(new HttpClientCodec());
handlers.add(WebSocketClientCompressionHandler.INSTANCE);
handlers.add(new HttpObjectAggregator(8192));
handlers.add(handler);
if (clientExtensionHandler != null) handlers.add(clientExtensionHandler);
p.addLast(handlers.toArray(new ChannelHandler[handlers.size()]));

I believe the GDAX clientExtensionHandler is the correct configuration, while adding WebSocketClientCompressionHandler.INSTANCE produces the error. I just commented out that line... don't think that's really the best solution, but it appears to work without breaking too much else. It shouldn't be too hard to refactor that code to only not add the default WebSocketClientCompressionHandler.INSTANCE if the request is to GDAX though. Again, don't know what I'm doing, probably not the best idea.

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I tried what @dcarr45 did and at first glance it seems to be working for Bitfinex and GDAX. Will keep an eye on it and see if it has any side effects, since I don't really know what I'm doing yet either. Just cracked open the code for the first time today. 😁

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Bitfinex also is broken by this commit e5d55da

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