com.jayqqaa12.jbase.tcp.netty.code.DreamJSONDecoder.java Source code

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Here is the source code for com.jayqqaa12.jbase.tcp.netty.code.DreamJSONDecoder.java

Source

/*
 * Copyright (c) 2015 www.caniu.com - ?
 * 
 * This software is the confidential and proprietary information of
 * luckin Group. You shall not disclose such confidential information 
 * and shall use it only in accordance with the terms of the license 
 * agreement you entered into with www.cainiu.com
 */
package com.jayqqaa12.jbase.tcp.netty.code;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.ByteToMessageDecoder;

import java.util.List;

/**
 *
 * ??:windows?json??GBK?
 *
 * @author  boyce
 * @created 2015723 ?4:42:19
 * @since   v1.0.0
 */
public class DreamJSONDecoder extends ByteToMessageDecoder {

    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
        while (true) {

            if (in.readableBytes() <= 4) {
                break;
            }
            in.markReaderIndex();
            int length = in.readInt();
            if (length <= 0) {
                throw new Exception("a negative length occurd while decode!");
            }
            if (in.readableBytes() < length) {
                in.resetReaderIndex();
                break;
            }
            byte[] msg = new byte[length];
            in.readBytes(msg);
            out.add(new String(msg, "UTF-8"));
        }

    }

    public static void main(String[] args) {
        System.out.println((byte) 255);
    }

}