git
https://github.com/sea-boat/mysql-protocol
概况
当mysql客户端使用show column命令时即对应这个FieldList命令包。
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 |
FieldList命令包
Payload
1 [04] COM_FIELD_LISTstring[NUL] tablestring[EOF] field wildcard
更多详情 ： http://dev.mysql.com/doc/internals/en/com-field-list.html
FieldList命令包操作
-
FieldList命令包类
/** * * <pre class="brush:php;toolbar:false"><b>mysql field list 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 FieldListPacket extends MySQLPacket { public byte flag; public byte[] table; public byte[] fieldWildcard; @Override public void read(byte[] data) { MySQLMessage mm = new MySQLMessage(data); packetLength = mm.readUB3(); packetId = mm.read(); flag = mm.read(); table = mm.readBytesWithNull(); fieldWildcard = mm.readBytes(); } @Override public void write(ByteBuffer buffer) { BufferUtil.writeUB3(buffer, calcPacketSize()); buffer.put(packetId); buffer.put(COM_FIELD_LIST); BufferUtil.writeWithNull(buffer, table); buffer.put(fieldWildcard); } @Override public int calcPacketSize() { int i = 1; i += table.length + 1; i += fieldWildcard.length; return i; } @Override protected String getPacketInfo() { return "MySQL Field List Packet"; } }
以上就是详细介绍mysql 协议的FieldList命令包及解析的内容，更多相关内容请关注PHP中文网（www.php.cn）！
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