org.jboss.netty.handler.codec.http.websocketx

Class WebSocket08FrameDecoder

java.lang.Object

org.jboss.netty.channel.SimpleChannelUpstreamHandler

org.jboss.netty.handler.codec.frame.FrameDecoder

org.jboss.netty.handler.codec.replay.ReplayingDecoder<WebSocket08FrameDecoder.State>

org.jboss.netty.handler.codec.http.websocketx.WebSocket08FrameDecoder

All Implemented Interfaces:

ChannelHandler, ChannelUpstreamHandler, LifeCycleAwareChannelHandler

Direct Known Subclasses:

WebSocket13FrameDecoder

public class WebSocket08FrameDecoder
extends ReplayingDecoder<WebSocket08FrameDecoder.State>

Decodes a web socket frame from wire protocol version 8 format. This code was forked from webbit and modified.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	WebSocket08FrameDecoder.State

Nested classes/interfaces inherited from interface org.jboss.netty.channel.ChannelHandler

ChannelHandler.Sharable

Field Summary

Fields inherited from class org.jboss.netty.handler.codec.frame.FrameDecoder

cumulation, DEFAULT_MAX_COMPOSITEBUFFER_COMPONENTS

Constructor Summary

Constructors

Constructor and Description
WebSocket08FrameDecoder(boolean maskedPayload, boolean allowExtensions) Constructor with default values
WebSocket08FrameDecoder(boolean maskedPayload, boolean allowExtensions, long maxFramePayloadLength) Constructor

Method Summary

Methods

Modifier and Type	Method and Description
protected void	checkCloseFrameBody(Channel channel, ChannelBuffer buffer)
protected Object	decode(ChannelHandlerContext ctx, Channel channel, ChannelBuffer buffer, WebSocket08FrameDecoder.State state) Decodes the received packets so far into a frame.

Methods inherited from class org.jboss.netty.handler.codec.replay.ReplayingDecoder

checkpoint, checkpoint, cleanup, decode, decodeLast, decodeLast, getState, internalBuffer, messageReceived, setState

Methods inherited from class org.jboss.netty.handler.codec.frame.FrameDecoder

actualReadableBytes, afterAdd, afterRemove, appendToCumulation, beforeAdd, beforeRemove, channelClosed, channelDisconnected, exceptionCaught, getMaxCumulationBufferCapacity, getMaxCumulationBufferComponents, isUnfold, newCumulationBuffer, replace, setMaxCumulationBufferCapacity, setMaxCumulationBufferComponents, setUnfold, unfoldAndFireMessageReceived, updateCumulation

Methods inherited from class org.jboss.netty.channel.SimpleChannelUpstreamHandler

channelBound, channelConnected, channelInterestChanged, channelOpen, channelUnbound, childChannelClosed, childChannelOpen, handleUpstream, writeComplete

Methods inherited from class java.lang.Object

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

Constructor Detail

WebSocket08FrameDecoder

public WebSocket08FrameDecoder(boolean maskedPayload,
                       boolean allowExtensions)

Constructor with default values

Parameters:

maskedPayload - Web socket servers must set this to true processed incoming masked payload. Client implementations must set this to false.

allowExtensions - Flag to allow reserved extension bits to be used or not

WebSocket08FrameDecoder

public WebSocket08FrameDecoder(boolean maskedPayload,
                       boolean allowExtensions,
                       long maxFramePayloadLength)

Constructor

Parameters:

maskedPayload - Web socket servers must set this to true processed incoming masked payload. Client implementations must set this to false.

allowExtensions - Flag to allow reserved extension bits to be used or not

maxFramePayloadLength - Maximum length of a frame's payload. Setting this to an appropriate value for you application helps check for denial of services attacks.

Method Detail

decode

protected Object decode(ChannelHandlerContext ctx,
            Channel channel,
            ChannelBuffer buffer,
            WebSocket08FrameDecoder.State state)
                 throws Exception

Description copied from class: ReplayingDecoder

Decodes the received packets so far into a frame.

Specified by:

decode in class ReplayingDecoder<WebSocket08FrameDecoder.State>

Parameters:

ctx - the context of this handler

channel - the current channel

buffer - the cumulative buffer of received packets so far. Note that the buffer might be empty, which means you should not make an assumption that the buffer contains at least one byte in your decoder implementation.

state - the current decoder state (null if unused)

Returns:

the decoded frame

Throws:

Exception

checkCloseFrameBody

protected void checkCloseFrameBody(Channel channel,
                       ChannelBuffer buffer)
                            throws CorruptedFrameException

Throws:

CorruptedFrameException