Mod_Rewrite意外行为L标志

Question

我的Web应用程序结构是:

/var/www/myapp/
    - www/
        - index.php
        - css.php
        - .htaccess

虚拟主机配置为:

<VirtualHost *:80>
        ServerName www.example.org
        DocumentRoot /var/www/myapp/www
        DirectoryIndex index.php index.html
        <Directory /var/www/myapp/www>
                Options Indexes FollowSymLinks MultiViews
                AllowOverride All
                Order allow,deny
                allow from all
        </Directory>
</VirtualHost>

在/var/www/myapp/www/.htaccess中有:

<IfModule mod_rewrite.c>
    RewriteEngine on
    RewriteBase /
    RewriteRule css css.php [L,NC]
    RewriteRule .* index.php
</IfModule>

现在,如果我打电话给www.example.org,我正确地重定向到index.php,但是如果我打电话给www.example.org/css,我仍然会被重定向到index.php.

如果我删除"RewriteRule.*index.php"行,然后调用www.example.org/css,我正确地重定向到css.php.

怎么了？非常感谢

========编辑=========

192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b7080058/initial] (3) [perdir /var/www/sviluppo/mattia_dev/example/www/] add path info postfix: /var/www/sviluppo/mattia_dev/example/www/DEV_2 -> /var/www/sviluppo/mattia_dev/example/www/DEV_2/css/example1/test.css
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b7080058/initial] (3) [perdir /var/www/sviluppo/mattia_dev/example/www/] strip per-dir prefix: /var/www/sviluppo/mattia_dev/example/www/DEV_2/css/example1/test.css -> DEV_2/css/example1/test.css
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b7080058/initial] (3) [perdir /var/www/sviluppo/mattia_dev/example/www/] applying pattern '^(DEV|TEST|PROD)\_[0-9]+\/(css|js|image|static)\/(.+)$' to uri 'DEV_2/css/example1/test.css'
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b7080058/initial] (2) [perdir /var/www/sviluppo/mattia_dev/example/www/] rewrite 'DEV_2/css/example1/test.css' -> 'css/example1/test.css'
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b7080058/initial] (3) [perdir /var/www/sviluppo/mattia_dev/example/www/] add per-dir prefix: css/example1/test.css -> /var/www/sviluppo/mattia_dev/example/www/css/example1/test.css
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b7080058/initial] (2) [perdir /var/www/sviluppo/mattia_dev/example/www/] trying to replace prefix /var/www/sviluppo/mattia_dev/example/www/ with /
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b7080058/initial] (5) strip matching prefix: /var/www/sviluppo/mattia_dev/example/www/css/example1/test.css -> css/example1/test.css
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b7080058/initial] (4) add subst prefix: css/example1/test.css -> /css/example1/test.css
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b7080058/initial] (1) [perdir /var/www/sviluppo/mattia_dev/example/www/] internal redirect with /css/example1/test.css [INTERNAL REDIRECT]
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b63188e8/initial/redir#1] (3) [perdir /var/www/sviluppo/mattia_dev/example/www/] strip per-dir prefix: /var/www/sviluppo/mattia_dev/example/www/css/example1/test.css -> css/example1/test.css
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b63188e8/initial/redir#1] (3) [perdir /var/www/sviluppo/mattia_dev/example/www/] applying pattern '^(DEV|TEST|PROD)\_[0-9]+\/(css|js|image|static)\/(.+)$' to uri 'css/example1/test.css'
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b63188e8/initial/redir#1] (3) [perdir /var/www/sviluppo/mattia_dev/example/www/] strip per-dir prefix: /var/www/sviluppo/mattia_dev/example/www/css/example1/test.css -> css/example1/test.css
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b63188e8/initial/redir#1] (3) [perdir /var/www/sviluppo/mattia_dev/example/www/] applying pattern '.*' to uri 'css/example1/test.css'
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b63188e8/initial/redir#1] (2) [perdir /var/www/sviluppo/mattia_dev/example/www/] rewrite 'css/example1/test.css' -> 'index.php'
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b63188e8/initial/redir#1] (3) [perdir /var/www/sviluppo/mattia_dev/example/www/] add per-dir prefix: index.php -> /var/www/sviluppo/mattia_dev/example/www/index.php
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b63188e8/initial/redir#1] (2) [perdir /var/www/sviluppo/mattia_dev/example/www/] trying to replace prefix /var/www/sviluppo/mattia_dev/example/www/ with /
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b63188e8/initial/redir#1] (5) strip matching prefix: /var/www/sviluppo/mattia_dev/example/www/index.php -> index.php
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b63188e8/initial/redir#1] (4) add subst prefix: index.php -> /index.php
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b63188e8/initial/redir#1] (1) [perdir /var/www/sviluppo/mattia_dev/example/www/] internal redirect with /index.php [INTERNAL REDIRECT]
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b6310db8/initial/redir#2] (3) [perdir /var/www/sviluppo/mattia_dev/example/www/] strip per-dir prefix: /var/www/sviluppo/mattia_dev/example/www/index.php -> index.php
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b6310db8/initial/redir#2] (3) [perdir /var/www/sviluppo/mattia_dev/example/www/] applying pattern '^(DEV|TEST|PROD)\_[0-9]+\/(css|js|image|static)\/(.+)$' to uri 'index.php'
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b6310db8/initial/redir#2] (3) [perdir /var/www/sviluppo/mattia_dev/example/www/] strip per-dir prefix: /var/www/sviluppo/mattia_dev/example/www/index.php -> index.php
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b6310db8/initial/redir#2] (3) [perdir /var/www/sviluppo/mattia_dev/example/www/] applying pattern '.*' to uri 'index.php'
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b6310db8/initial/redir#2] (2) [perdir /var/www/sviluppo/mattia_dev/example/www/] rewrite 'index.php' -> 'index.php'
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b6310db8/initial/redir#2] (3) [perdir /var/www/sviluppo/mattia_dev/example/www/] add per-dir prefix: index.php -> /var/www/sviluppo/mattia_dev/example/www/index.php
192.168.1.8 - - [14/Jul/2012:19:07:21 +0200] [www.example.org/sid#b747b6c0][rid#b6310db8/initial/redir#2] (1) [perdir /var/www/sviluppo/mattia_dev/example/www/] initial URL equal rewritten URL: /var/www/sviluppo/mattia_dev/example/www/index.php [IGNORING REWRITE]

似乎发生了第一次重定向,但mod_rewrite没有停止导致内部重定向.然后,更改的url将再次传递给mod_rewrite,并发生第二次重定向,但现在匹配第二个规则.

我无法理解它,因为我已经放置[L]标志只是为了确保mod_rewrite停止.

再次感谢

Answer 1

你错过了一个关于L国旗的重要事实:

因此,如果您RewriteRule在这些[ .htaccess,<Directory>]上下文之一中使用指令,则必须采取明确的步骤来避免规则循环,并且不要仅依靠[L]标志来终止一系列规则的执行

来自:L | last(Flag) ; 我很大胆

这意味着,只有通过使用L没有你想要的效果来防止内部重定向.这INTERNAL REDIRECT是因为它必须发生,你已经用你的.htaccess配置指定了它.该L标志不是阻止该标志的正确标志INTERNAL REDIRECT.

让我们仔细看看你的问题以及实际发生的事情:

我无法理解它,因为我已经放置[L]标志只是为了确保mod_rewrite停止.

只是你有错误的L旗帜.它只会停止当前的重写,这意味着RewriteRule它下面的指令不会在当前轮次(内循环)中处理.

如果更改的URI L将重新注入下一轮(外部循环),如下面的技术细节流程图所示:

要突出显示L标记的位置以及INTERNAL REDIRECT发生的位置,这是与您的specfic(第一个)URI重写的一些注释相同的图形:

它表明该L标志仅退出内部循环,但如果URI已被重写(更改) - 如您的情况那样 - 外部循环会注意更改的URI将再次传递给您的所有重写规则.

相反,您可能希望根据手册的该部分显示以下示例来制定条件:

RewriteBase /
RewriteCond %{REQUEST_URI} !=/index.php
RewriteRule ^(.*) /index.php?req=$1 [L,PT]

(PT有它自己的手动输入,或多或少不是解决方案的一部分,只是注意到因为我引用了示例原样)

你真正想要使用的是END旗帜:

RewriteRule css css.php [END,NC]

但是,如果您有所需的apache版本,请与您的系统管理员联系(2.3.9及更高版本中提供).如果没有,你需要操作RewriteCond.