/**
* Returns a new {@link EmbeddedChannel} that decodes the HTTP2 message content encoded in the
* specified {@code contentEncoding}.
*
* @param contentEncoding the value of the {@code content-encoding} header
* @return a new {@link ByteToMessageDecoder} if the specified encoding is supported. {@code null}
* otherwise (alternatively, you can throw a {@link Http2Exception} to block unknown
* encoding).
* @throws Http2Exception If the specified encoding is not not supported and warrants an exception
*/
protected EmbeddedChannel newContentDecoder(CharSequence contentEncoding) throws Http2Exception {
if (GZIP.equalsIgnoreCase(contentEncoding) || XGZIP.equalsIgnoreCase(contentEncoding)) {
return new EmbeddedChannel(ZlibCodecFactory.newZlibDecoder(ZlibWrapper.GZIP));
}
if (DEFLATE.equalsIgnoreCase(contentEncoding) || XDEFLATE.equalsIgnoreCase(contentEncoding)) {
final ZlibWrapper wrapper = strict ? ZlibWrapper.ZLIB : ZlibWrapper.ZLIB_OR_NONE;
// To be strict, 'deflate' means ZLIB, but some servers were not implemented correctly.
return new EmbeddedChannel(ZlibCodecFactory.newZlibDecoder(wrapper));
}
// 'identity' or unsupported
return null;
}
@Override
public void initChannel(SocketChannel ch) throws Exception {
ChannelPipeline pipeline = ch.pipeline();
// Enable stream compression (you can remove these two if unnecessary)
pipeline.addLast("deflater", ZlibCodecFactory.newZlibEncoder(ZlibWrapper.GZIP));
pipeline.addLast("inflater", ZlibCodecFactory.newZlibDecoder(ZlibWrapper.GZIP));
// Add the number codec first,
pipeline.addLast("decoder", new BigIntegerDecoder());
pipeline.addLast("encoder", new NumberEncoder());
// and then business logic.
// Please note we create a handler for every new channel
// because it has stateful properties.
pipeline.addLast("handler", new FactorialServerHandler());
}
@Override
public void initChannel(SocketChannel ch) throws Exception {
ChannelPipeline pipeline = ch.pipeline();
// Enable stream compression (you can remove these two if unnecessary)
if (compress) {
pipeline.addLast("deflater", ZlibCodecFactory.newZlibEncoder(ZlibWrapper.GZIP));
pipeline.addLast("inflater", ZlibCodecFactory.newZlibDecoder(ZlibWrapper.GZIP));
}
/**
* length (4 bytes).
*
* <p>Note: max message size is 64 Mb = 67108864 bytes this defines a framer with a max of 64 Mb
* message, 4 bytes are the length, and strip 4 bytes
*/
pipeline.addLast("frameDecoder", new LengthFieldBasedFrameDecoder(67108864, 0, 4, 0, 4));
// pipeline.addLast("frameDecoder", new
// DebugFrameDecoder(67108864, 0, 4, 0, 4));
// decoder must be first
Object[] messageTypes = {
Management.getDefaultInstance(),
Image.Request.getDefaultInstance(),
App.Request.getDefaultInstance()
};
pipeline.addLast("protobufDecoder", new CustomRaftDecoder(messageTypes));
// pipeline.addLast("protobufDecoder", new ProtobufDecoder(Management.getDefaultInstance()));
// pipeline.addLast("protobufDecoder2", new ProtobufDecoder(Request.getDefaultInstance()));
pipeline.addLast("frameEncoder", new LengthFieldPrepender(4));
pipeline.addLast("protobufEncoder", new ProtobufEncoder());
// our server processor (new instance for each connection)
pipeline.addLast("handler", handler);
}