Class CleartextHttp2ServerUpgradeHandler

java.lang.Object

io.netty.channel.ChannelHandlerAdapter

io.netty.channel.ChannelInboundHandlerAdapter

io.netty.handler.codec.ByteToMessageDecoder

io.netty.handler.codec.http2.CleartextHttp2ServerUpgradeHandler

All Implemented Interfaces:

ChannelHandler, ChannelInboundHandler

public final class CleartextHttp2ServerUpgradeHandler
extends ByteToMessageDecoder

Performing cleartext upgrade, by h2c HTTP upgrade or Prior Knowledge. This handler config pipeline for h2c upgrade when handler added. And will update pipeline once it detect the connection is starting HTTP/2 by prior knowledge or not.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	CleartextHttp2ServerUpgradeHandler.PriorKnowledgeUpgradeEvent	User event that is fired to notify about HTTP/2 protocol is started.

Nested classes/interfaces inherited from class ByteToMessageDecoder

ByteToMessageDecoder.Cumulator

Nested classes/interfaces inherited from interface ChannelHandler

ChannelHandler.Sharable

Field Summary

Fields

Modifier and Type	Field	Description
private static final ByteBuf	CONNECTION_PREFACE
private final ChannelHandler	http2ServerHandler
private final HttpServerCodec	httpServerCodec
private final HttpServerUpgradeHandler	httpServerUpgradeHandler

Fields inherited from class ByteToMessageDecoder

COMPOSITE_CUMULATOR, MERGE_CUMULATOR

Constructor Summary

Constructors

Constructor	Description
CleartextHttp2ServerUpgradeHandler(HttpServerCodec httpServerCodec, HttpServerUpgradeHandler httpServerUpgradeHandler, ChannelHandler http2ServerHandler)	Creates the channel handler provide cleartext HTTP/2 upgrade from HTTP upgrade or prior knowledge

Method Summary

Modifier and Type	Method	Description
protected void	decode(ChannelHandlerContext ctx, ByteBuf in, java.util.List<java.lang.Object> out)	Peek inbound message to determine current connection wants to start HTTP/2 by HTTP upgrade or prior knowledge
void	handlerAdded(ChannelHandlerContext ctx)	Do nothing by default, sub-classes may override this method.

Methods inherited from class ByteToMessageDecoder

actualReadableBytes, callDecode, channelInactive, channelRead, channelReadComplete, decodeLast, discardSomeReadBytes, handlerRemoved, handlerRemoved0, internalBuffer, isSingleDecode, setCumulator, setDiscardAfterReads, setSingleDecode, userEventTriggered

Methods inherited from class ChannelInboundHandlerAdapter

channelActive, channelRegistered, channelUnregistered, channelWritabilityChanged, exceptionCaught

Methods inherited from class ChannelHandlerAdapter

ensureNotSharable, isSharable

Methods inherited from class java.lang.Object

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

Field Details

CONNECTION_PREFACE

private static final ByteBuf CONNECTION_PREFACE

httpServerCodec

private final HttpServerCodec httpServerCodec

httpServerUpgradeHandler

private final HttpServerUpgradeHandler httpServerUpgradeHandler

http2ServerHandler

private final ChannelHandler http2ServerHandler

Constructor Details

CleartextHttp2ServerUpgradeHandler

public CleartextHttp2ServerUpgradeHandler(HttpServerCodec httpServerCodec,
 HttpServerUpgradeHandler httpServerUpgradeHandler,
 ChannelHandler http2ServerHandler)

Creates the channel handler provide cleartext HTTP/2 upgrade from HTTP upgrade or prior knowledge

Parameters:

httpServerCodec - the http server codec

httpServerUpgradeHandler - the http server upgrade handler for HTTP/2

http2ServerHandler - the http2 server handler, will be added into pipeline when starting HTTP/2 by prior knowledge

Method Details

handlerAdded

public void handlerAdded(ChannelHandlerContext ctx)
                  throws java.lang.Exception

Description copied from class: ChannelHandlerAdapter

Do nothing by default, sub-classes may override this method.

Specified by:

handlerAdded in interface ChannelHandler

Overrides:

handlerAdded in class ChannelHandlerAdapter

Throws:

java.lang.Exception

decode

protected void decode(ChannelHandlerContext ctx,
 ByteBuf in,
 java.util.List<java.lang.Object> out)
               throws java.lang.Exception

Peek inbound message to determine current connection wants to start HTTP/2 by HTTP upgrade or prior knowledge

Specified by:

decode in class ByteToMessageDecoder

Parameters:

ctx - the ChannelHandlerContext which this ByteToMessageDecoder belongs to

in - the ByteBuf from which to read data

out - the List to which decoded messages should be added

Throws:

java.lang.Exception - is thrown if an error occurs