[英]reading bytes to Netty server
public class ServerPipelineFactory implements ChannelPipelineFactory {
@Override
public ChannelPipeline getPipeline() throws Exception {
PacketFrameDecoder decoder = new PacketFrameDecoder();
PacketFrameEncoder encoder = new PacketFrameEncoder();
return Channels.pipeline(decoder, encoder, new Handler());
}
}
和我的解碼器
public class PacketFrameDecoder extends
ReplayingDecoder<PacketFrameDecoder.DecoderState> {
public enum DecoderState {
READ_CONTENT;
}
private int length;
public PacketFrameDecoder() {
super(DecoderState.READ_CONTENT);
}
@Override
protected Object decode(ChannelHandlerContext chc, Channel chnl,
ChannelBuffer cb, DecoderState state) throws Exception {
switch (state) {
case READ_CONTENT:
for (int i = 0; i < cb.capacity(); i ++) {
byte b = cb.getByte(i);
System.out.println((char) b);
}
return null;
default:
throw new Error("Shouldn't reach here.");
}
}
}
我發送消息
Socket fromserver = new Socket("localhost", 7283);
PrintWriter out = new PrintWriter(fromserver.getOutputStream(), true);
int data = 12;
out.write(data);
out.flush();
out.close();
fromserver.close();
但是當我得到字節時, 我有cb.capacity()= 256 並顯示消息“?0?0” System.out.println((char) b);
請幫忙
使用容量是錯誤的,因為它是緩沖區中的“最大”字節數。 同樣從位置0開始也是錯誤的,因為readerIndex可能位於其他位置。 請閱讀ChannelBuffer的apidocs,所有這些都將詳細解釋。
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