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75 lines
2.8 KiB
75 lines
2.8 KiB
package com.inspect.tcpserver.tcp;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.ByteBufUtil;
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import io.netty.buffer.Unpooled;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.handler.codec.ByteToMessageDecoder;
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import org.apache.commons.lang3.RandomStringUtils;
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import org.apache.tomcat.util.buf.HexUtils;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.util.List;
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public class MyDecoder extends ByteToMessageDecoder {
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private static final Logger log = LoggerFactory.getLogger(MyDecoder.class);
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private final String PACKET_FLAG = "EB90";
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private final int BASE_LENGTH = 2 + 8 + 8 + 1 + 4 + 2;
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@Override
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protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
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if (in.readableBytes() >= BASE_LENGTH) {
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try {
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//skip
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if (in.readableBytes() > 512 * 1024) {
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in.skipBytes(in.readableBytes());
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}
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final String uuid = RandomStringUtils.randomAlphanumeric(32);
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ByteBuf forPrint = in.copy();
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log.info("################ 会话: {}, 客户: {}, 上行原始报文 ################ \n {}", uuid, ctx.channel().id().asShortText(), ByteBufUtil.hexDump(forPrint));
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int index;
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String flag;
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while (true) {
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index = in.readerIndex();
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in.markReaderIndex();
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byte[] dst = new byte[2];
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in.readBytes(dst, 0, 2);
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flag = ByteUtils.byte2Hex(dst);
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if (PACKET_FLAG.equalsIgnoreCase(flag)) {
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break;
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}
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in.resetReaderIndex();
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if (in.readableBytes() < BASE_LENGTH) {
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return;
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}
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}
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long sendIndex = in.readLongLE();
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long receiveIndex = in.readLongLE();
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byte sourceFlag = in.readByte();
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int xmlLength = in.readIntLE();
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if (in.readableBytes() < xmlLength) {
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in.readerIndex(index);
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return;
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}
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byte[] payload = new byte[xmlLength];
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in.readBytes(payload);
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in.readShortLE();
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BinaryModel binaryModel = new BinaryModel();
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binaryModel.receiveIndex = receiveIndex;
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binaryModel.sendIndex = sendIndex;
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binaryModel.sourceFlag = sourceFlag;
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binaryModel.dataLength = xmlLength;
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binaryModel.dataBuf = Unpooled.copiedBuffer(payload);
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binaryModel.uuid = uuid;
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out.add(binaryModel);
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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}
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}
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