Class WebSocketServerProtocolHandler
- java.lang.Object
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- io.netty.channel.ChannelHandlerAdapter
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- io.netty.channel.ChannelInboundHandlerAdapter
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- io.netty.handler.codec.MessageToMessageDecoder<WebSocketFrame>
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- io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler
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- All Implemented Interfaces:
ChannelHandler
,ChannelInboundHandler
,ChannelOutboundHandler
public class WebSocketServerProtocolHandler extends 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 theChannelInboundHandler.userEventTriggered(ChannelHandlerContext, Object)
and check if the event was instance ofWebSocketServerProtocolHandler.HandshakeComplete
, the event will contain extra information about the handshake such as the request and selected subprotocol.
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
WebSocketServerProtocolHandler.HandshakeComplete
The Handshake was completed successfully and the channel was upgraded to websockets.static class
WebSocketServerProtocolHandler.ServerHandshakeStateEvent
Events that are fired to notify about handshake status-
Nested classes/interfaces inherited from interface io.netty.channel.ChannelHandler
ChannelHandler.Sharable
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Constructor Summary
Constructors Constructor Description WebSocketServerProtocolHandler(WebSocketServerProtocolConfig serverConfig)
Base constructorWebSocketServerProtocolHandler(java.lang.String websocketPath)
WebSocketServerProtocolHandler(java.lang.String websocketPath, boolean checkStartsWith)
WebSocketServerProtocolHandler(java.lang.String websocketPath, boolean checkStartsWith, long handshakeTimeoutMillis)
WebSocketServerProtocolHandler(java.lang.String websocketPath, long handshakeTimeoutMillis)
WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols)
WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions)
WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean checkStartsWith, boolean dropPongFrames, long handshakeTimeoutMillis, WebSocketDecoderConfig decoderConfig)
WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, int maxFrameSize)
WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, int maxFrameSize, boolean allowMaskMismatch)
WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, int maxFrameSize, boolean allowMaskMismatch, boolean checkStartsWith)
WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, int maxFrameSize, boolean allowMaskMismatch, boolean checkStartsWith, boolean dropPongFrames)
WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, int maxFrameSize, boolean allowMaskMismatch, boolean checkStartsWith, boolean dropPongFrames, long handshakeTimeoutMillis)
WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, int maxFrameSize, boolean allowMaskMismatch, boolean checkStartsWith, long handshakeTimeoutMillis)
WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, int maxFrameSize, boolean allowMaskMismatch, long handshakeTimeoutMillis)
WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, int maxFrameSize, long handshakeTimeoutMillis)
WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, long handshakeTimeoutMillis)
WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, long handshakeTimeoutMillis)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
bind(ChannelHandlerContext ctx, java.net.SocketAddress localAddress, ChannelPromise promise)
Called once a bind operation is made.protected WebSocketServerHandshakeException
buildHandshakeException(java.lang.String message)
Returns aWebSocketHandshakeException
that depends on which client or server pipeline this handler belongs.void
close(ChannelHandlerContext ctx, ChannelPromise promise)
Called once a close operation is made.void
connect(ChannelHandlerContext ctx, java.net.SocketAddress remoteAddress, java.net.SocketAddress localAddress, ChannelPromise promise)
Called once a connect operation is made.protected void
decode(ChannelHandlerContext ctx, WebSocketFrame frame, java.util.List<java.lang.Object> out)
Decode from one message to an other.void
deregister(ChannelHandlerContext ctx, ChannelPromise promise)
Called once a deregister operation is made from the current registeredEventLoop
.void
disconnect(ChannelHandlerContext ctx, ChannelPromise promise)
Called once a disconnect operation is made.void
exceptionCaught(ChannelHandlerContext ctx, java.lang.Throwable cause)
CallsChannelHandlerContext.fireExceptionCaught(Throwable)
to forward to the nextChannelHandler
in theChannelPipeline
.void
flush(ChannelHandlerContext ctx)
Called once a flush operation is made.void
handlerAdded(ChannelHandlerContext ctx)
Do nothing by default, sub-classes may override this method.void
read(ChannelHandlerContext ctx)
InterceptsChannelHandlerContext.read()
.void
write(ChannelHandlerContext ctx, java.lang.Object msg, ChannelPromise promise)
Called once a write operation is made.-
Methods inherited from class io.netty.handler.codec.MessageToMessageDecoder
acceptInboundMessage, channelRead, channelReadComplete
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Methods inherited from class io.netty.channel.ChannelInboundHandlerAdapter
channelActive, channelInactive, channelRegistered, channelUnregistered, channelWritabilityChanged, userEventTriggered
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Methods inherited from class io.netty.channel.ChannelHandlerAdapter
ensureNotSharable, handlerRemoved, isSharable
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface io.netty.channel.ChannelHandler
handlerRemoved
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Constructor Detail
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(WebSocketServerProtocolConfig serverConfig)
Base constructor- Parameters:
serverConfig
- Server protocol configuration.
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(java.lang.String websocketPath)
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(java.lang.String websocketPath, long handshakeTimeoutMillis)
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(java.lang.String websocketPath, boolean checkStartsWith)
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(java.lang.String websocketPath, boolean checkStartsWith, long handshakeTimeoutMillis)
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols)
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, long handshakeTimeoutMillis)
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions)
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, long handshakeTimeoutMillis)
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, int maxFrameSize)
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, int maxFrameSize, long handshakeTimeoutMillis)
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, int maxFrameSize, boolean allowMaskMismatch)
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, int maxFrameSize, boolean allowMaskMismatch, long handshakeTimeoutMillis)
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, int maxFrameSize, boolean allowMaskMismatch, boolean checkStartsWith)
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, int maxFrameSize, boolean allowMaskMismatch, boolean checkStartsWith, long handshakeTimeoutMillis)
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, int maxFrameSize, boolean allowMaskMismatch, boolean checkStartsWith, boolean dropPongFrames)
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean allowExtensions, int maxFrameSize, boolean allowMaskMismatch, boolean checkStartsWith, boolean dropPongFrames, long handshakeTimeoutMillis)
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WebSocketServerProtocolHandler
public WebSocketServerProtocolHandler(java.lang.String websocketPath, java.lang.String subprotocols, boolean checkStartsWith, boolean dropPongFrames, long handshakeTimeoutMillis, WebSocketDecoderConfig decoderConfig)
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Method Detail
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handlerAdded
public void handlerAdded(ChannelHandlerContext ctx)
Description copied from class:ChannelHandlerAdapter
Do nothing by default, sub-classes may override this method.- Specified by:
handlerAdded
in interfaceChannelHandler
- Overrides:
handlerAdded
in classChannelHandlerAdapter
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decode
protected void decode(ChannelHandlerContext ctx, WebSocketFrame frame, java.util.List<java.lang.Object> out) throws java.lang.Exception
Description copied from class:MessageToMessageDecoder
Decode from one message to an other. This method will be called for each written message that can be handled by this decoder.- Parameters:
ctx
- theChannelHandlerContext
which thisMessageToMessageDecoder
belongs toframe
- the message to decode to an other oneout
- theList
to which decoded messages should be added- Throws:
java.lang.Exception
- is thrown if an error occurs
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buildHandshakeException
protected WebSocketServerHandshakeException buildHandshakeException(java.lang.String message)
Returns aWebSocketHandshakeException
that depends on which client or server pipeline this handler belongs. Should be overridden in implementation otherwise a default exception is used.
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exceptionCaught
public void exceptionCaught(ChannelHandlerContext ctx, java.lang.Throwable cause) throws java.lang.Exception
Description copied from class:ChannelInboundHandlerAdapter
CallsChannelHandlerContext.fireExceptionCaught(Throwable)
to forward to the nextChannelHandler
in theChannelPipeline
. Sub-classes may override this method to change behavior.- Specified by:
exceptionCaught
in interfaceChannelHandler
- Specified by:
exceptionCaught
in interfaceChannelInboundHandler
- Throws:
java.lang.Exception
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close
public void close(ChannelHandlerContext ctx, ChannelPromise promise) throws java.lang.Exception
Description copied from interface:ChannelOutboundHandler
Called once a close operation is made.- Specified by:
close
in interfaceChannelOutboundHandler
- Parameters:
ctx
- theChannelHandlerContext
for which the close operation is madepromise
- theChannelPromise
to notify once the operation completes- Throws:
java.lang.Exception
- thrown if an error occurs
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write
public void write(ChannelHandlerContext ctx, java.lang.Object msg, ChannelPromise promise) throws java.lang.Exception
Description copied from interface:ChannelOutboundHandler
Called once a write operation is made. The write operation will write the messages through theChannelPipeline
. Those are then ready to be flushed to the actualChannel
onceChannel.flush()
is called- Specified by:
write
in interfaceChannelOutboundHandler
- Parameters:
ctx
- theChannelHandlerContext
for which the write operation is mademsg
- the message to writepromise
- theChannelPromise
to notify once the operation completes- Throws:
java.lang.Exception
- thrown if an error occurs
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bind
public void bind(ChannelHandlerContext ctx, java.net.SocketAddress localAddress, ChannelPromise promise) throws java.lang.Exception
Description copied from interface:ChannelOutboundHandler
Called once a bind operation is made.- Specified by:
bind
in interfaceChannelOutboundHandler
- Parameters:
ctx
- theChannelHandlerContext
for which the bind operation is madelocalAddress
- theSocketAddress
to which it should boundpromise
- theChannelPromise
to notify once the operation completes- Throws:
java.lang.Exception
- thrown if an error occurs
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connect
public void connect(ChannelHandlerContext ctx, java.net.SocketAddress remoteAddress, java.net.SocketAddress localAddress, ChannelPromise promise) throws java.lang.Exception
Description copied from interface:ChannelOutboundHandler
Called once a connect operation is made.- Specified by:
connect
in interfaceChannelOutboundHandler
- Parameters:
ctx
- theChannelHandlerContext
for which the connect operation is maderemoteAddress
- theSocketAddress
to which it should connectlocalAddress
- theSocketAddress
which is used as source on connectpromise
- theChannelPromise
to notify once the operation completes- Throws:
java.lang.Exception
- thrown if an error occurs
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disconnect
public void disconnect(ChannelHandlerContext ctx, ChannelPromise promise) throws java.lang.Exception
Description copied from interface:ChannelOutboundHandler
Called once a disconnect operation is made.- Specified by:
disconnect
in interfaceChannelOutboundHandler
- Parameters:
ctx
- theChannelHandlerContext
for which the disconnect operation is madepromise
- theChannelPromise
to notify once the operation completes- Throws:
java.lang.Exception
- thrown if an error occurs
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deregister
public void deregister(ChannelHandlerContext ctx, ChannelPromise promise) throws java.lang.Exception
Description copied from interface:ChannelOutboundHandler
Called once a deregister operation is made from the current registeredEventLoop
.- Specified by:
deregister
in interfaceChannelOutboundHandler
- Parameters:
ctx
- theChannelHandlerContext
for which the close operation is madepromise
- theChannelPromise
to notify once the operation completes- Throws:
java.lang.Exception
- thrown if an error occurs
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read
public void read(ChannelHandlerContext ctx) throws java.lang.Exception
Description copied from interface:ChannelOutboundHandler
InterceptsChannelHandlerContext.read()
.- Specified by:
read
in interfaceChannelOutboundHandler
- Throws:
java.lang.Exception
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flush
public void flush(ChannelHandlerContext ctx) throws java.lang.Exception
Description copied from interface:ChannelOutboundHandler
Called once a flush operation is made. The flush operation will try to flush out all previous written messages that are pending.- Specified by:
flush
in interfaceChannelOutboundHandler
- Parameters:
ctx
- theChannelHandlerContext
for which the flush operation is made- Throws:
java.lang.Exception
- thrown if an error occurs
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