在C#中,Netty的功能是通過Pipeline實現(xiàn)的。要支持自定義的編解碼器,你需要創(chuàng)建一個新的ChannelHandler,并將其添加到Pipeline中。以下是一個簡單的示例,展示了如何創(chuàng)建一個自定義的編解碼器并將其添加到Pipeline中。
首先,創(chuàng)建一個自定義的編解碼器類,實現(xiàn)IChannelHandler
接口:
using DotNetty.Buffers;
using DotNetty.Codecs;
using DotNetty.Transport.Channels;
public class CustomEncoder : MessageToByteEncoder<IByteBuffer>
{
protected override void Encode(IChannelHandlerContext context, IByteBuffer message, IByteBuffer output)
{
// 在這里實現(xiàn)你的編碼邏輯
// 例如,將輸入的字節(jié)緩沖區(qū)轉(zhuǎn)換為大寫
int readableBytes = message.ReadableBytes;
byte[] bytes = new byte[readableBytes];
message.GetBytes(message.ReaderIndex, bytes);
for (int i = 0; i< bytes.Length; i++)
{
bytes[i] = char.ToUpper((char)bytes[i]);
}
output.WriteBytes(bytes);
}
}
public class CustomDecoder : ByteToMessageDecoder
{
protected override void Decode(IChannelHandlerContext context, IByteBuffer input, List<object> output)
{
// 在這里實現(xiàn)你的解碼邏輯
// 例如,將輸入的字節(jié)緩沖區(qū)轉(zhuǎn)換為小寫
int readableBytes = input.ReadableBytes;
byte[] bytes = new byte[readableBytes];
input.GetBytes(input.ReaderIndex, bytes);
for (int i = 0; i< bytes.Length; i++)
{
bytes[i] = char.ToLower((char)bytes[i]);
}
output.Add(Unpooled.WrappedBuffer(bytes));
}
}
然后,在你的主程序中,將自定義的編解碼器添加到Pipeline中:
using DotNetty.Handlers.Logging;
using DotNetty.Transport.Bootstrapping;
using DotNetty.Transport.Channels;
using DotNetty.Transport.Channels.Sockets;
class Program
{
static async Task Main(string[] args)
{
var group = new MultithreadEventLoopGroup();
try
{
var bootstrap = new ServerBootstrap();
bootstrap
.Group(group)
.Channel<TcpServerSocketChannel>()
.Option(ChannelOption.SoBacklog, 100)
.Handler(new LoggingHandler("LSTN"))
.ChildHandler(new ActionChannelInitializer<ISocketChannel>(channel =>
{
IChannelPipeline pipeline = channel.Pipeline;
// 添加自定義的編解碼器
pipeline.AddLast(new CustomDecoder());
pipeline.AddLast(new CustomEncoder());
// 添加其他處理器
pipeline.AddLast(new YourCustomHandler());
}));
IChannel boundChannel = await bootstrap.BindAsync(8080);
Console.ReadLine();
await boundChannel.CloseAsync();
}
finally
{
await group.ShutdownGracefullyAsync(TimeSpan.FromMilliseconds(100), TimeSpan.FromSeconds(1));
}
}
}
這樣,當(dāng)客戶端連接到服務(wù)器時,數(shù)據(jù)將通過自定義的編解碼器進行處理。在這個例子中,編解碼器將輸入的字節(jié)緩沖區(qū)轉(zhuǎn)換為大寫(編碼)和小寫(解碼)。你可以根據(jù)需要修改編解碼器的實現(xiàn)。