netty pb协议设计

1 方案一

1.1 niurenbang 

1.1.1 http协议控制沾包拆包

		pipeline.addLast(new HttpRequestDecoder());
		// 客户端发送的是httpResponse，所以要使用HttpResponseEncoder进行编码
		pipeline.addLast(new HttpResponseEncoder());
		pipeline.addLast(new HttpObjectAggregator(65535));
		
		pipeline.addLast(new HttpBodyDecoder());
		pipeline.addLast(new HttpBodyEncoder());
		
		// 业务处理Handler
		pipeline.addLast("httpServerHandler", handler);

1.1.2 最外层协议解析

public class HttpBodyDecoder extends SimpleChannelInboundHandler<FullHttpRequest> {
	
	private static final Logger logger = LoggerFactory.getLogger(HttpBodyDecoder.class);
	@Override
	protected void channelRead0(ChannelHandlerContext ctx, FullHttpRequest request)
			throws Exception {
		
		if (HttpMethod.POST.equals(request.method())) {
			
			String uri = request.uri();
			ByteBuf content = request.content();
			
			try {
				byte[] bs = new byte[content.readableBytes()];
				content.readBytes(bs);
				
				SimulateMsg simulateMsg = SimulateMsg.parseFrom(bs);
				ctx.pipeline().addBefore("httpServerHandler", "protobufEncoder", new ProtobufEncoder());
				
				Attribute<String> attr = ctx.channel().attr(AttributeMapConstant.NETTY_CHANNEL_KEY_HTTP_REQ_URI);
				attr.setIfAbsent(uri);
				
				super.channelRead(ctx, simulateMsg);