@Override
public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
// Initialize the encoder, decoder, flow controllers, and internal state.
encoder.lifecycleManager(this);
decoder.lifecycleManager(this);
encoder.flowController().channelHandlerContext(ctx);
decoder.flowController().channelHandlerContext(ctx);
byteDecoder = new PrefaceDecoder(ctx);
}
@Override
public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
// Initialize the encoder and decoder.
encoder.lifecycleManager(this);
decoder.lifecycleManager(this);
byteDecoder = new PrefaceDecoder(ctx);
}
/**
* Constructor for pre-configured encoder and decoder. Just sets the {@code this} as the {@link
* Http2LifecycleManager} and builds them.
*/
public Http2ConnectionHandler(Http2ConnectionDecoder decoder, Http2ConnectionEncoder encoder) {
this.initialSettings = null;
this.decoder = checkNotNull(decoder, "decoder");
this.encoder = checkNotNull(encoder, "encoder");
if (encoder.connection() != decoder.connection()) {
throw new IllegalArgumentException(
"Encoder and Decoder do not share the same connection object");
}
}
@Override
public void channelInactive(ChannelHandlerContext ctx) throws Exception {
if (byteDecoder != null) {
encoder.flowController().channelHandlerContext(null);
decoder.flowController().channelHandlerContext(null);
byteDecoder.channelInactive(ctx);
super.channelInactive(ctx);
byteDecoder = null;
}
}
@Override
public void flush(ChannelHandlerContext ctx) throws Http2Exception {
// Trigger pending writes in the remote flow controller.
encoder.flowController().writePendingBytes();
try {
super.flush(ctx);
} catch (Throwable t) {
throw new Http2Exception(INTERNAL_ERROR, "Error flushing", t);
}
}
/**
* Handles the server-side (cleartext) upgrade from HTTP to HTTP/2.
*
* @param settings the settings for the remote endpoint.
*/
public void onHttpServerUpgrade(Http2Settings settings) throws Http2Exception {
if (!connection().isServer()) {
throw connectionError(PROTOCOL_ERROR, "Server-side HTTP upgrade requested for a client");
}
if (prefaceSent() || decoder.prefaceReceived()) {
throw connectionError(
PROTOCOL_ERROR, "HTTP upgrade must occur before HTTP/2 preface is sent or received");
}
// Apply the settings but no ACK is necessary.
encoder.remoteSettings(settings);
// Create a stream in the half-closed state.
connection().remote().createStream(HTTP_UPGRADE_STREAM_ID, true);
}
public Http2Connection connection() {
return encoder.connection();
}