git
https://github.com/sea-boat/mysql-protocol
概況
當mysql客戶端使用show column命令時即對應這個FieldList命令包。
mysql通信報文結構
| 類型 | 名字 | 描述 |
|---|---|---|
| int | payload長度 | 按照the least significant byte first存儲，3個字節的payload和1個字節的序列號組合成報文頭 |
| int | 序列號 | |
| string | payload | 報文體，長度即為前面指定的payload長度 |
FieldList命令包
Payload
1??????????????[04]?COM_FIELD_LISTstring[NUL]????tablestring[EOF]????field?wildcard
更多詳情 ：?http://dev.mysql.com/doc/internals/en/com-field-list.html
FieldList命令包操作
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FieldList命令包類
/** ?*? ?*?<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"; } }
?以上就是詳細介紹mysql 協議的FieldList命令包及解析的內容，更多相關內容請關注PHP中文網（www.php.cn）！
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