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| | | package com.hdl.sdk.link.core.protocol;
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| | | import com.hdl.sdk.link.common.utils.LogUtils;
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| | | import com.hdl.sdk.link.common.event.EventDispatcher;
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| | | import com.hdl.sdk.link.common.utils.ByteUtils;
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| | | import com.hdl.sdk.link.core.bean.LinkPacket;
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| | | import com.hdl.sdk.link.core.bean.LinkResponse;
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| | | import com.hdl.sdk.link.core.utils.ByteBufferUtils;
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| | | import com.hdl.sdk.link.core.utils.QueueUtils;
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| | | import com.hdl.sdk.link.gateway.HDLLinkLocalGateway;
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| | | import com.hdl.sdk.link.socket.bean.Packet;
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| | | import com.hdl.sdk.link.socket.codec.ByteToMessageDecoder;
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| | |
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| | | import java.nio.ByteBuffer;
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| | |
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| | | /**
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| | | * Created by Tong on 2021/9/22.
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| | | * link协议粘包拆包
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| | | */
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| | | public class LinkMessageDecoder extends ByteToMessageDecoder<LinkResponse> {
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| | |
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| | | private static final String TAG=LinkMessageDecoder.class.getName();
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| | | //instance
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| | | private volatile static LinkMessageDecoder instance;
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| | |
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| | | //getInstance
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| | | public static synchronized LinkMessageDecoder getInstance() {
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| | | if (instance == null) {
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| | | synchronized (LinkMessageDecoder.class) {
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| | | if (instance == null) {
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| | | instance = new LinkMessageDecoder();
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| | | }
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| | | }
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| | | }
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| | | return instance;
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| | | }
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| | |
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| | | /**
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| | | * 接收数据缓冲区
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| | | */
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| | | private final ByteBuffer byteBuffer;
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| | |
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| | | private final byte[] head = "Topic:".getBytes();
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| | |
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| | | public LinkMessageDecoder() {
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| | | byteBuffer = ByteBuffer.allocate(1024 * 200);//100K
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| | | }
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| | |
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| | | /// <summary>
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| | | /// 获取内容长度
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| | | /// </summary>
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| | | /// <param name="topMsgs"></param>
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| | | /// <returns></returns>
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| | | int getLenght(String[] topMsgs) {
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| | | try {
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| | | for (int i = 0; i < topMsgs.length; i++) {
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| | | String topMsg = topMsgs[i].trim();
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| | | if (topMsg.startsWith("Length:")) {
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| | | return Integer.parseInt(topMsg.replace("Length:", "").trim());
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| | | }
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| | | }
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| | | } catch (Exception e) {
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| | | LogUtils.e("异常数据:" + topMsgs[0] + "\r\n" + topMsgs[1]);
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| | | return -1;
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| | | }
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| | | //找不到长度
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| | | return -1;
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| | | }
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| | |
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| | | /// <summary>
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| | | /// 获取主题
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| | | /// </summary>
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| | | /// <param name="topMsgs"></param>
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| | | /// <returns></returns>
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| | | private String getTopic(String[] topMsgs) {
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| | | for (int i = 0; i < topMsgs.length; i++) {
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| | | String topMsg = topMsgs[i].trim();
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| | | if (topMsg.startsWith("Topic:")) {
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| | | return topMsg.replace("Topic:", "");
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| | | }
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| | | }
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| | | //找不到主题
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| | | return null;
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| | | }
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| | |
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| | | /**
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| | | * 获取数据的开始位置
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| | | *
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| | | * @return 数据位的开始索引
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| | | */
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| | | int getBodyIndex() {
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| | | byte r = (byte) '\r';
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| | | byte n = (byte) '\n';
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| | | for (int i = 0; i < byteBuffer.position(); i++) {
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| | | //找出数据内容前面的两个换行
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| | | if (3 <= i && byteBuffer.get(i - 3) == r && byteBuffer.get(i - 2) == n && byteBuffer.get(i - 1) == r && byteBuffer.get(i) == n) {
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| | | //剩余的数据
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| | | return i + 1;
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| | | }
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| | | }
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| | | return -1;
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| | | }
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| | |
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| | | /**
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| | | * 获取头部数据
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| | | *
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| | | * @return
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| | | */
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| | | String getHeader() {
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| | | int bodyIndex = getBodyIndex();
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| | | if (bodyIndex < 0) {
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| | | //没有找到头部数据
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| | | return null;
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| | | } else {
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| | | byte bodyBytes[] = ByteBufferUtils.copyBytes(byteBuffer, bodyIndex);
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| | | return new String(bodyBytes);
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| | | }
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| | | }
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| | |
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| | | /**
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| | | * 获取数据内容
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| | | *
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| | | * @param lenght
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| | | * @return
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| | | */
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| | | byte[] getBody(int index, int lenght) {
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| | | //是否已经获取完整所有的数据
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| | | byte[] bodyBytes = new byte[lenght];
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| | | if (index < 0 || byteBuffer.position() < index + lenght) {
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| | | //当前数据还没有接收完成
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| | | return null;
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| | | }
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| | |
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| | | for (int i = 0; i < bodyBytes.length; i++) {
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| | | bodyBytes[i] = byteBuffer.get(index + i);
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| | | }
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| | | return bodyBytes;
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| | | }
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| | |
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| | |
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| | | /**
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| | | * 这边处理了缓存数据粘包的情况,每次请求都需要吧当前完整的文件除去 以便于下次的返回
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| | | * tempList用于存储多余的数据
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| | | * contentList用于本次数据的存储(发送给订阅的数据)
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| | | */
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| | | byte[] geBody() {
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| | | int len = 3 + 4 + 4 + ((byteBuffer.get(7) & 0xFF) * 256 * 256 * 256) + ((byteBuffer.get(8) & 0xFF) * 256 * 256) + ((byteBuffer.get(9) * 256) & 0xFF) + (byteBuffer.get(10) & 0xFf);
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| | | byte[] bodyBytes = new byte[len];
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| | | for (int i = 0; i < len; i++) {
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| | | bodyBytes[i] = byteBuffer.get(i);
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| | | }
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| | |
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| | | int endIndex = byteBuffer.position();
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| | | byteBuffer.clear();
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| | | for (int i = len; i < endIndex; i++) {
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| | | byteBuffer.put(byteBuffer.get(i));
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| | | }
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| | | return bodyBytes;
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| | | }
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| | |
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| | | /**
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| | | * 移除可能存在的无效数据
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| | | */
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| | | void removeInVoidBytes() {
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| | | int index = 0;
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| | | boolean isMatch = false;
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| | | for (; index < byteBuffer.position() - head.length; index++) {
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| | | isMatch = true;
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| | | for (int j = 0, k = 0; j < head.length; j++, k++) {
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| | | if (head[j] != byteBuffer.get(index + k)) {
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| | | isMatch = false;
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| | | break;
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| | | }
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| | | }
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| | | if (isMatch) {
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| | | break;
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| | | }
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| | | }
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| | |
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| | | if (0 < index && isMatch) {
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| | | int endIndex = byteBuffer.position();
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| | | byteBuffer.clear();
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| | | for (int i = index; i < endIndex; i++) {
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| | | byteBuffer.put(byteBuffer.get(i));
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| | | }
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| | | }
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| | | }
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| | |
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| | | /**
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| | | * 移除到指定位置前面的数据
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| | | *
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| | | * @param position 指定位置
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| | | */
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| | | void remove(int position) {
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| | | int endIndex = byteBuffer.position();
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| | | byteBuffer.clear();
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| | | for (int i = position; i < endIndex; i++) {
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| | | byteBuffer.put(byteBuffer.get(i));
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| | | }
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| | | }
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| | |
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| | | void fileManger(int commandAck, byte[] recevieBytes) {
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| | | String topic = "65531_" + commandAck;
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| | | LinkResponse response = new LinkResponse();
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| | | response.setTopic(topic);
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| | | response.setByteData(recevieBytes);
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| | | EventDispatcher.getInstance().post(response.getTopic(), response);
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| | | }
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| | |
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| | | int bytes2int(byte[] bytes) {
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| | | int result = 0;
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| | | if (bytes.length == 2) {
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| | | int c = (bytes[0] & 0xff) << 8;
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| | | int d = (bytes[1] & 0xff);
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| | | result = c | d;
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| | | } else if (bytes.length == 4) {
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| | | return bytes[3] & 0xFF | //
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| | | (bytes[2] & 0xFF) << 8 | //
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| | | (bytes[1] & 0xFF) << 16 | //
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| | | (bytes[0] & 0xFF) << 24; //
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| | | }
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| | | return result;
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| | | }
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| | |
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| | | public String byte2hex(byte[] bytes) {
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| | | StringBuilder sb = new StringBuilder();
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| | | String tmp = null;
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| | | for (byte b : bytes) {
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| | | //将每个字节与0xFF进行与运算,然后转化为10进制,然后借助于Integer再转化为16进制
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| | | tmp = Integer.toHexString(0xFF & b);
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| | | if (tmp.length() == 1) {
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| | | tmp = "0" + tmp;
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| | | }
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| | | sb.append(tmp + " ");
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| | | }
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| | | return sb.toString();
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| | | }
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| | |
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| | | @Override
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| | | protected synchronized LinkResponse decoder(Packet packet) {
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| | | try {
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| | | if (null == packet) {
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| | | return null;
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| | | }
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| | | byteBuffer.put(packet.getBytes());
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| | | } catch (Exception e) {
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| | | LogUtils.e("接收到数据异常:\r\n" + e.getMessage());
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| | | byteBuffer.flip();
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| | | byteBuffer.clear();
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| | | }
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| | | try {
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| | | //如果多条命令打包在一条数据中,都需要处理完
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| | | while (true) {
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| | | if (byteBuffer.position() > 2) {//判断是否是文件处理通知 wxr
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| | | byte[] topBytes = new byte[3];
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| | | topBytes[0] = byteBuffer.get(0);
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| | | topBytes[1] = byteBuffer.get(1);
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| | | topBytes[2] = byteBuffer.get(2);
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| | | if (new String(topBytes).equals("hex")) {
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| | | //TODO 这块代码统一移出其它地方处理
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| | | byte[] commandBytes = ByteBufferUtils.copyBytes(byteBuffer, 5, 2);
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| | | int command = bytes2int(commandBytes);
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| | | byte[] submitBytes = geBody();
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| | | if (command == 258 || command == 260 || command == 261) {
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| | | //读取驱动列表响应 ||驱动安装申请响应
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| | | if (submitBytes.length > 11) {
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| | | byte[] rangeBytes = ByteUtils.copyBytes(submitBytes, 11, submitBytes.length - 11);
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| | | fileManger(command, rangeBytes);
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| | | } else {
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| | | //方便问题排查
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| | | fileManger(command, submitBytes);
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| | | }
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| | | } else {
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| | | //给秀桡使用 后面的业务最好都在这边处理 不然会造成业务分散
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| | | fileManger(command, submitBytes);
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| | | }
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| | | continue;
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| | | }
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| | | }
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| | | removeInVoidBytes();//移除可能存在的无效数据
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| | |
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| | | //头部数据
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| | | String header = getHeader();
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| | |
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| | | if (header == null) {
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| | | break;
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| | | }
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| | | String[] topMsgs = header.split("\r\n");
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| | |
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| | | String topic = getTopic(topMsgs);
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| | | int lenght = getLenght(topMsgs);
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| | | if (topic == null || lenght <= 0) {
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| | | //获取不到主题或者头部数据还没有接收完成
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| | | break;
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| | | }
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| | |
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| | | int bodyIndex = getBodyIndex();
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| | | //是否已经获取完整所有的数据
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| | | byte[] body = getBody(bodyIndex, lenght);
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| | |
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| | | if (body == null) {
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| | | //当前数据还没有接收完成
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| | | break;
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| | | }
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| | |
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| | | remove(bodyIndex + lenght);
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| | |
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| | | if (topic.contains("heartbeat_reply")) {
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| | | if (packet.getSocket() != null) {
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| | | packet.getSocket().setSoTimeout(10 * 1000);
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| | | }
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| | | continue;
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| | | }
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| | |
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| | | QueueUtils.getInstance().add(new LinkPacket(topic, body));
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| | | }
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| | | } catch (Exception ee) {
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| | | LogUtils.e("处理接收的数据异常:\r\n" + ee.getMessage());
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| | | }
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| | | return null;
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| | | }
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| | | }
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