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微信消息netty服务器

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package com.foxinmy.weixin4j.socket;

import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.ConcurrentHashMap;

import com.foxinmy.weixin4j.request.WeixinRequest;
import com.foxinmy.weixin4j.type.EncryptType;
import com.foxinmy.weixin4j.util.AesToken;
import com.foxinmy.weixin4j.util.MessageUtil;
import com.foxinmy.weixin4j.util.ServerToolkits;
import com.foxinmy.weixin4j.xml.EncryptMessageHandler;

import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageDecoder;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.HttpMethod;
import io.netty.handler.codec.http.QueryStringDecoder;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

/**
 * 微信消息解码类
 *
 * @className WeixinMessageDecoder
 * @author jinyu([email protected])
 * @date 2014年11月13日
 * @since JDK 1.6
 * @see 加密接入指引
 * @see com.foxinmy.weixin4j.request.WeixinRequest
 */
@ChannelHandler.Sharable
public class WeixinMessageDecoder extends MessageToMessageDecoder {
    private final InternalLogger logger = InternalLoggerFactory.getInstance(getClass());

    private Map aesTokenMap = new ConcurrentHashMap();

    public WeixinMessageDecoder(final Map aesTokenMap) {
        for (Entry entry : aesTokenMap.entrySet()) {
            this.aesTokenMap.put(entry.getKey() == null ? "" : entry.getKey(), entry.getValue());
        }
    }

    public void addAesToken(final AesToken asetoken) {
        aesTokenMap.put(asetoken.getWeixinId(), asetoken);
    }

    @Override
    protected void decode(ChannelHandlerContext ctx, FullHttpRequest req, List