Package io.netty.handler.codec.http2

Class Http2ConnectionHandler.PrefaceDecoder

java.lang.Object

io.netty.handler.codec.http2.Http2ConnectionHandler.BaseDecoder

io.netty.handler.codec.http2.Http2ConnectionHandler.PrefaceDecoder

Enclosing class:

Http2ConnectionHandler

private final class Http2ConnectionHandler.PrefaceDecoder
extends Http2ConnectionHandler.BaseDecoder

Field Summary

Fields

Modifier and Type	Field	Description
private ByteBuf	clientPrefaceString
private boolean	prefaceSent

Constructor Summary

Constructors

Constructor	Description
PrefaceDecoder(ChannelHandlerContext ctx)

Method Summary

Modifier and Type	Method	Description
void	channelActive(ChannelHandlerContext ctx)
void	channelInactive(ChannelHandlerContext ctx)
private void	cleanup()	Releases the clientPrefaceString.
void	decode(ChannelHandlerContext ctx, ByteBuf in, java.util.List<java.lang.Object> out)
void	handlerRemoved(ChannelHandlerContext ctx)	Releases the clientPrefaceString.
boolean	prefaceSent()	Determine if the HTTP/2 connection preface been sent.
private boolean	readClientPrefaceString(ByteBuf in)	Decodes the client connection preface string from the input buffer.
void	sendPrefaceIfNeeded(ChannelHandlerContext ctx)	Sends the HTTP/2 connection preface upon establishment of the connection, if not already sent.
private boolean	verifyFirstFrameIsSettings(ByteBuf in)	Peeks at that the next frame in the buffer and verifies that it is a non-ack SETTINGS frame.

Methods inherited from class java.lang.Object

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

Field Detail

clientPrefaceString

private ByteBuf clientPrefaceString

prefaceSent

private boolean prefaceSent

Constructor Detail

PrefaceDecoder

PrefaceDecoder(ChannelHandlerContext ctx)
        throws java.lang.Exception

Throws:

java.lang.Exception

Method Detail

prefaceSent

public boolean prefaceSent()

Description copied from class: Http2ConnectionHandler.BaseDecoder

Determine if the HTTP/2 connection preface been sent.

Overrides:

prefaceSent in class Http2ConnectionHandler.BaseDecoder

decode

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

Specified by:

decode in class Http2ConnectionHandler.BaseDecoder

Throws:

java.lang.Exception

channelActive

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

Overrides:

channelActive in class Http2ConnectionHandler.BaseDecoder

Throws:

java.lang.Exception

channelInactive

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

Overrides:

channelInactive in class Http2ConnectionHandler.BaseDecoder

Throws:

java.lang.Exception

handlerRemoved

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

Releases the clientPrefaceString. Any active streams will be left in the open.

Overrides:

handlerRemoved in class Http2ConnectionHandler.BaseDecoder

Throws:

java.lang.Exception

cleanup

private void cleanup()

Releases the clientPrefaceString. Any active streams will be left in the open.

readClientPrefaceString

private boolean readClientPrefaceString(ByteBuf in)
                                 throws Http2Exception

Decodes the client connection preface string from the input buffer.

Returns:

true if processing of the client preface string is complete. Since client preface strings can only be received by servers, returns true immediately for client endpoints.

Throws:

Http2Exception

verifyFirstFrameIsSettings

private boolean verifyFirstFrameIsSettings(ByteBuf in)
                                    throws Http2Exception

Peeks at that the next frame in the buffer and verifies that it is a non-ack SETTINGS frame.

Parameters:

in - the inbound buffer.

Returns:

true if the next frame is a non-ack SETTINGS frame, false if more data is required before we can determine the next frame type.

Throws:

Http2Exception - thrown if the next frame is NOT a non-ack SETTINGS frame.

sendPrefaceIfNeeded

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

Sends the HTTP/2 connection preface upon establishment of the connection, if not already sent.

Overrides:

sendPrefaceIfNeeded in class Http2ConnectionHandler.BaseDecoder

Parameters:

ctx - the ChannelHandlerContext to use.

Throws:

java.lang.Exception - thrown on error.