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    • com.foxinmy.weixin4j.socket.WeixinResponseEncoder Maven / Gradle / Ivy

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    package com.foxinmy.weixin4j.socket;

import java.util.List;

import com.foxinmy.weixin4j.response.WeixinResponse;
import com.foxinmy.weixin4j.type.EncryptType;
import com.foxinmy.weixin4j.util.AesToken;
import com.foxinmy.weixin4j.util.HttpUtil;
import com.foxinmy.weixin4j.util.MessageUtil;
import com.foxinmy.weixin4j.util.ServerToolkits;

import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageEncoder;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

/**
 * 微信回复编码类
 *
 * @className WeixinResponseEncoder
 * @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.response.WeixinResponse
 */
@ChannelHandler.Sharable
public class WeixinResponseEncoder extends MessageToMessageEncoder {

    protected final InternalLogger logger = InternalLoggerFactory.getInstance(getClass());

    private final String XML_START = "";
    // ---------------明文节点
    private final String ELEMENT_TOUSERNAME = "";
    private final String ELEMENT_FROMUSERNAME = "";
    private final String ELEMENT_CREATETIME = "";
    private final String ELEMENT_MSGTYPE = "";
    // ---------------密文节点
    private final String ELEMENT_MSGSIGNATURE = "";
    private final String ELEMENT_ENCRYPT = "";
    private final String ELEMENT_TIMESTAMP = "";
    private final String ELEMENT_NONCE = "";
    private final String XML_END = "";

    @Override
    protected void encode(ChannelHandlerContext ctx, WeixinResponse response, List out) {
        WeixinMessageTransfer messageTransfer = ctx.channel().attr(ServerToolkits.MESSAGE_TRANSFER_KEY).get();
        EncryptType encryptType = messageTransfer.getEncryptType();
        StringBuilder content = new StringBuilder();
        content.append(XML_START);
        content.append(String.format(ELEMENT_TOUSERNAME, messageTransfer.getFromUserName()));
        content.append(String.format(ELEMENT_FROMUSERNAME, messageTransfer.getToUserName()));
        content.append(String.format(ELEMENT_CREATETIME, System.currentTimeMillis() / 1000l));
        content.append(String.format(ELEMENT_MSGTYPE, response.getMsgType()));
        content.append(response.toContent());
        content.append(XML_END);
        if (encryptType == EncryptType.AES) {
            AesToken aesToken = messageTransfer.getAesToken();
            String nonce = ServerToolkits.generateRandomString(32);
            String timestamp = Long.toString(System.currentTimeMillis() / 1000l);
            String encrtypt = MessageUtil.aesEncrypt(aesToken.getWeixinId(), aesToken.getAesKey(), content.toString());
            String msgSignature = MessageUtil.signature(aesToken.getToken(), nonce, timestamp, encrtypt);
            content.delete(0, content.length());
            content.append(XML_START);
            content.append(String.format(ELEMENT_NONCE, nonce));
            content.append(String.format(ELEMENT_TIMESTAMP, timestamp));
            content.append(String.format(ELEMENT_MSGSIGNATURE, msgSignature));
            content.append(String.format(ELEMENT_ENCRYPT, encrtypt));
            content.append(XML_END);
        }
        ctx.writeAndFlush(HttpUtil.createHttpResponse(content.toString(), ServerToolkits.CONTENTTYPE$APPLICATION_XML));
        logger.info("{} encode weixin response:{}", encryptType, content);
    }
}    
    
    
    

    




    
    
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