mysql 协议的process kill包及解析

git

https://github.com/sea-boat/mysql-protocol

概况

mysql客户端可以用process kill命令让服务端终止某个连接,正常会返回ok包。

mysql通信报文结构

类型 名字 描述
int payload长度 按照the least significant byte first存储,3个字节的payload和1个字节的序列号组合成报文头
int 序列号
string payload 报文体,长度即为前面指定的payload长度

process kill命令包

Payload

1              [0c] COM_PROCCESS_KILL4              connection id

更多详情 : http://dev.mysql.com/doc/internals/en/com-process-kill.html

process kill命令包类

/**   *    * <pre class="brush:php;toolbar:false"><b>mysql process kill packet.</b>

 * @author   * 

seaboat

 * 

<b>email: </b>849586227@qq.com

 * 

<b>blog: </b>http://www.php.cn/;/pre>   * @version 1.0   * @see http://www.php.cn/   */public class ProcessKillPacket extends MySQLPacket {        public byte flag = (byte) 0xfe;    public int connectionId;    @Override      public void read(byte[] data) {          MySQLMessage mm = new MySQLMessage(data);          packetLength = mm.readUB3();          packetId = mm.read();          flag = mm.read();          connectionId = mm.readInt();      }    @Override      public void write(ByteBuffer buffer) {        int size = calcPacketSize();          BufferUtil.writeUB3(buffer, size);          buffer.put(packetId);          buffer.put(COM_PROCESS_KILL);          BufferUtil.writeInt(buffer, connectionId);      }    @Override      public int calcPacketSize() {        return 5;      }    @Override      protected String getPacketInfo() {        return "MySQL Process Kill Packet";      }    }

 以上就是mysql 协议的process kill包及解析的内容,更多相关内容请关注PHP中文网(www.php.cn)!

© 版权声明
THE END
喜欢就支持一下吧
点赞14 分享