在CodeIgniter中不能允许访问上传目录

Question

http://localhost/uploads/student_doc/15.doc

我无法访问此目录。我使用.htaccess来允许访问，但这不起作用。

<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /
    RewriteCond %{REQUEST_URI} ^system.*
    RewriteRule ^(.*)$ /index.php?/$1 [L]
    RewriteCond %{REQUEST_URI} ^application.*
    RewriteRule ^(.*)$ /index.php?/$1 [L]
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ index.php?/$1 [L]

Order deny,allow
Allow from all

RewriteCond %{REQUEST_URI} !/uploads/student_doc
 Options +Indexes 
# or #
IndexIgnore *

</IfModule>