[英]MySQL LOAD_FILE returning NULL
我正在做這個SELECT LOAD_FILE("/home/user/domains/example.com/public_html/robots.txt") AS tmp FROM tmpTable
但它返回NULL。 我如何檢查這是否是因為我沒有獲得FILE權限或者是否還有別的東西? MySQL不會出錯。 (我正在使用PHP)
任何有LOAD_FILE經驗的人都告訴我這個功能:)
<?php
$result = mysql_query('SELECT LOAD_FILE("/home/user/domains/example.com/public_html/robots.txt") AS tmp FROM tmpTable') or die(mysql_error());
while($row = mysql_fetch_assoc($result))
{
var_dump( $row['tmp'] );
}
可以在這里找到一個非常難看的解決方法:
http://angkatbahu.blogspot.com.es/2011/03/mysql-loadfile-function-in-ubuntu-it_12.html
如果您將要加載的文件放在/ var / lib / mysql / all_images目錄中,它就可以了!
在ubuntu 12.10中測試過(沒有,chomd'ing文件給mysql用戶,沒用)
要查看您擁有的權限,請使用show grants
。
我已經記錄了一些額外的命令,您可以使用它們來檢查您是否符合以下條件:
我將對文件做出補遺。 確保:
父目錄的權限示例:
mysql> \! ls -ld `dirname /home/jlam/code/projectName/doc/filesForTesting/images/imageTest01.jpg` drwxrwxr--. 2 jlam jlam 4096 May 12 14:22 /home/jlam/code/projectName/doc/filesForTesting/images mysql> select hex(LOAD_FILE('/home/jlam/code/projectName/doc/filesForTesting/images/image Test01.jpg')); +-------------------------------------------------------------------------------------------------------------+ | hex(LOAD_FILE('/home/jlam/code/projectName/doc/filesForTesting/images/imageTest01.jpg')) | +-------------------------------------------------------------------------------------------------------------+ | NULL | +-------------------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec) mysql> \! chmod o+x /home/jlam/code/projectName/doc/filesForTesting/images mysql> \! ls -ld `dirname /home/jlam/code/projectName/doc/filesForTesting/images/imageTest01.jpg` drwxrwxr-x. 2 jlam jlam 4096 May 12 14:22 /home/jlam/code/projectName/doc/filesForTesting/images mysql> select hex(LOAD_FILE('/home/jlam/code/projectName/doc/filesForTesting/images/imageTest01.jpg')); +-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | hex(LOAD_FILE('/home/jlam/code/projectName/doc/filesForTesting/images/imageTest01.jpg')) +-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | FFD8FFE1001845786966000049492A00080000000000000000000000FFEC00114475636B7900010004000000500000FFE10407687474703A2F2F6E732E61646F62652E636F6D2F7861702F312E302F003C3F787061636B657420626567696E3D22EFBBBF222069643D2257354D304D7043656869487 +--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
用戶權限示例:
16:38:09 (getImages) ~/code/projectName/doc/filesForTesting/images$ mysql -u eventCal -p eventCal Enter password: mysql> show grants; +-----------------------------------------------------------------------------------------------------------------+ | Grants for eventCal@localhost | +-----------------------------------------------------------------------------------------------------------------+ | GRANT USAGE ON *.* TO 'eventCal'@'localhost' IDENTIFIED BY PASSWORD '*xxxxx' | | GRANT ALL PRIVILEGES ON `tmp`.* TO 'eventCal'@'localhost' | | GRANT ALL PRIVILEGES ON `eventCalTesting`.* TO 'eventCal'@'localhost' | | GRANT ALL PRIVILEGES ON `eventCal`.* TO 'eventCal'@'localhost' | | GRANT ALL PRIVILEGES ON `eventCal_categoryMigration`.* TO 'eventCal'@'localhost' | +-----------------------------------------------------------------------------------------------------------------+ 5 rows in set (0.00 sec) mysql> select hex(LOAD_FILE('/home/jlam/code/projectName/doc/filesForTesting/images/imageTest01.jpg')); +-------------------------------------------------------------------------------------------------------------+ | hex(LOAD_FILE('/home/jlam/code/projectName/doc/filesForTesting/images/imageTest01.jpg')) | +-------------------------------------------------------------------------------------------------------------+ | NULL | +-------------------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec)
在其他根會話中:
mysql> grant file ON *.* to eventCal@localhost; Query OK, 0 rows affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec)
回到用戶會話,我仍然無法加載文件
mysql> select hex(LOAD_FILE('/home/jlam/code/projectName/doc/filesForTesting/images/imageTest01.jpg')); +-------------------------------------------------------------------------------------------------------------+ | hex(LOAD_FILE('/home/jlam/code/projectName/doc/filesForTesting/images/imageTest01.jpg')) | +-------------------------------------------------------------------------------------------------------------+ | NULL | +-------------------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec)
.....但是如果我退出並重新登錄:
mysql> exit Bye 16:40:14 (getImages) ~/code/projectName/doc/filesForTesting/images$ mysql -u eventCal -p eventCal Enter password: mysql> select hex(LOAD_FILE('/home/jlam/code/projectName/doc/filesForTesting/images/imageTest01.jpg')); +-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | hex(LOAD_FILE('/home/jlam/code/projectName/doc/filesForTesting/images/imageTest01.jpg')) +-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | FFD8FFE1001845786966000049492A00080000000000000000000000FFEC00114475636B7900010004000000500000FFE10407687474703A2F2F6E732E61646F62652E636F6D2F7861702F312E302F003C3F787061636B657420626567696E3D22EFBBBF222069643D2257354D304D7043656869487 +--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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