io.netty.handler.codec.http.websocketx

Class WebSocketServerProtocolHandler

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.handler.codec.MessageToMessageDecoder<WebSocketFrame>

io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler

All Implemented Interfaces:

io.netty.channel.ChannelHandler

public class WebSocketServerProtocolHandler
extends io.netty.handler.codec.MessageToMessageDecoder<WebSocketFrame>

This handler does all the heavy lifting for you to run a websocket server. It takes care of websocket handshaking as well as processing of control frames (Close, Ping, Pong). Text and Binary data frames are passed to the next handler in the pipeline (implemented by you) for processing. See io.netty.example.http.websocketx.html5.WebSocketServer for usage. The implementation of this handler assumes that you just want to run a websocket server and not process other types HTTP requests (like GET and POST). If you wish to support both HTTP requests and websockets in the one server, refer to the io.netty.example.http.websocketx.server.WebSocketServer example. To know once a handshake was done you can intercept the ChannelHandler.userEventTriggered(ChannelHandlerContext, Object) and check if the event was of type WebSocketServerProtocolHandler.ServerHandshakeStateEvent.HANDSHAKE_COMPLETE.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	WebSocketServerProtocolHandler.ServerHandshakeStateEvent Events that are fired to notify about handshake status

Nested classes/interfaces inherited from interface io.netty.channel.ChannelHandler

io.netty.channel.ChannelHandler.Sharable, io.netty.channel.ChannelHandler.Skip

Constructor Summary

Constructors

Constructor and Description
WebSocketServerProtocolHandler(String websocketPath)
WebSocketServerProtocolHandler(String websocketPath, String subprotocols)
WebSocketServerProtocolHandler(String websocketPath, String subprotocols, boolean allowExtensions)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	decode(io.netty.channel.ChannelHandlerContext ctx, WebSocketFrame frame, List<Object> out)
void	exceptionCaught(io.netty.channel.ChannelHandlerContext ctx, Throwable cause)
void	handlerAdded(io.netty.channel.ChannelHandlerContext ctx)

Methods inherited from class io.netty.handler.codec.MessageToMessageDecoder

acceptInboundMessage, channelRead

Methods inherited from class io.netty.channel.ChannelHandlerAdapter

bind, channelActive, channelInactive, channelReadComplete, channelRegistered, channelWritabilityChanged, close, connect, disconnect, flush, handlerRemoved, isSharable, read, userEventTriggered, write

Methods inherited from class java.lang.Object

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

Constructor Detail

WebSocketServerProtocolHandler

public WebSocketServerProtocolHandler(String websocketPath)

WebSocketServerProtocolHandler

public WebSocketServerProtocolHandler(String websocketPath,
                              String subprotocols)

WebSocketServerProtocolHandler

public WebSocketServerProtocolHandler(String websocketPath,
                              String subprotocols,
                              boolean allowExtensions)

Method Detail

handlerAdded

public void handlerAdded(io.netty.channel.ChannelHandlerContext ctx)

Specified by:

handlerAdded in interface io.netty.channel.ChannelHandler

Overrides:

handlerAdded in class io.netty.channel.ChannelHandlerAdapter

decode

protected void decode(io.netty.channel.ChannelHandlerContext ctx,
          WebSocketFrame frame,
          List<Object> out)
               throws Exception

Throws:

Exception

exceptionCaught

public void exceptionCaught(io.netty.channel.ChannelHandlerContext ctx,
                   Throwable cause)
                     throws Exception

Specified by:

exceptionCaught in interface io.netty.channel.ChannelHandler

Throws:

Exception