org.jboss.aerogear.io.netty.handler.codec.sockjs.transport
Class WebSocketHAProxyHandshaker

java.lang.Object
  io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker
      io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker00
          org.jboss.aerogear.io.netty.handler.codec.sockjs.transport.WebSocketHAProxyHandshaker

public class WebSocketHAProxyHandshaker
extends io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker00

An extension of WebSocketServerHandshaker00 which handles Hixie76 upgrade requests that plays nicely with HAProxy. When HAProxy sends an WebSocket Hixie 76 upgrade reqeust will first send the request headers, after receiveing the response, it will then send the nouce. This class will extract the 'SEC_WEBSOCKET_KEY1' and 'SEC_WEBSOCKET_KEY2' from the first request and later use it for the actual handshake. Note that currently this does not work as desired with unless the HTTP request header 'Content-Lenght' has been set. Netty's HttpObjectDecoder uses HttpHeaders.getContentLength(HttpMessage, long) which will set the lenght of Hixie 76 request to '8'. But there will be no body in the first request and therefor the message will be dropped.

Field Summary

Fields inherited from class io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker

SUB_PROTOCOL_WILDCARD

Constructor Summary

WebSocketHAProxyHandshaker(String webSocketURL, String subprotocols, int maxFramePayloadLength)

Method Summary

void	addWsCodec(io.netty.channel.ChannelFuture future)
protected io.netty.buffer.ByteBuf	calculateLastKey(io.netty.buffer.ByteBuf content)
io.netty.channel.ChannelFuture	handshake(io.netty.channel.Channel channel, io.netty.handler.codec.http.FullHttpRequest req)
static boolean	isHAProxyReqeust(io.netty.handler.codec.http.FullHttpRequest request) A HAProxy request is a WebSocket Upgrade request with out a 'Sec-WebSocket-Version' and does not have the final handshake key in the body of the request.
protected io.netty.handler.codec.http.FullHttpResponse	newHandshakeResponse(io.netty.handler.codec.http.FullHttpRequest req, io.netty.handler.codec.http.HttpHeaders headers)

Methods inherited from class io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker00

close, newWebsocketDecoder, newWebSocketEncoder

Methods inherited from class io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker

close, handshake, maxFramePayloadLength, selectedSubprotocol, selectSubprotocol, subprotocols, uri, version

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

WebSocketHAProxyHandshaker

public WebSocketHAProxyHandshaker(String webSocketURL,
                                  String subprotocols,
                                  int maxFramePayloadLength)

Method Detail

newHandshakeResponse

protected io.netty.handler.codec.http.FullHttpResponse newHandshakeResponse(io.netty.handler.codec.http.FullHttpRequest req,
                                                                            io.netty.handler.codec.http.HttpHeaders headers)

Overrides:

newHandshakeResponse in class io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker00

calculateLastKey

protected io.netty.buffer.ByteBuf calculateLastKey(io.netty.buffer.ByteBuf content)

handshake

public io.netty.channel.ChannelFuture handshake(io.netty.channel.Channel channel,
                                                io.netty.handler.codec.http.FullHttpRequest req)

Overrides:

handshake in class io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker

addWsCodec

public void addWsCodec(io.netty.channel.ChannelFuture future)

isHAProxyReqeust

public static boolean isHAProxyReqeust(io.netty.handler.codec.http.FullHttpRequest request)

A HAProxy request is a WebSocket Upgrade request with out a 'Sec-WebSocket-Version' and does not have the final handshake key in the body of the request.