使用 mod_rewrite 重定向到 Apache 内置 404 页面？
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Redirect to Apache built-in 404 page with mod_rewrite?
提问by Pekka
Is there a way to actively serve Apache's default, built-in 404 pagefor a number of URLs using mod_rewrite? Not a custom error document, but a rule like
有没有办法使用 mod_rewrite 为多个 URL主动提供 Apache 的默认内置 404 页面？不是自定义错误文档，而是类似的规则
RewriteCond %{REQUEST_URI} ^/dirname/pagename
RewriteRule -- serve 404 page -----
I know how to build a PHP page that sends the 404 header and have mod_rewriteredirect all the URLs there but I would prefer a solution that is based on mod_rewriteonly.
我知道如何构建一个发送 404 标头mod_rewrite并将所有 URL 重定向到那里的 PHP 页面，但我更喜欢mod_rewrite仅基于的解决方案。
I just had the idea of redirecting to a non-existent address:
我只是想重定向到一个不存在的地址：
RewriteCond %{REQUEST_URI} ^/dirname/pagename
RewriteRule .* /sflkads?lfkasdf?lkasdfl?kasdf
but that would give the user the message "/sflkads?lfkasdf?lkasdfl?kasdf does not exist"on the error page, which looks a bit unprofessional.
但这会给用户在错误页面上显示“/sflkads?lfkasdf?lkasdfl?kasdf 不存在”的消息，这看起来有点不专业。
回答by mercator
You can use the Rflag on the RewriteRuleto force a redirect with a given status code:
您可以使用 上的R标志RewriteRule来强制使用给定状态代码进行重定向：
While this is typically used for redirects, any valid status code can be given here. If the status code is outside the redirect range (300-399), then the Substitution string is dropped and rewriting is stopped as if the L flag was used.
虽然这通常用于重定向，但可以在此处给出任何有效的状态代码。如果状态代码在重定向范围 (300-399) 之外，则替换字符串将被删除并停止重写，就像使用了 L 标志一样。
So this:
所以这：
RewriteRule ^/?page\.html$ - [R=404]
would return the default 404 page for /page.html. Since this is a regexp, remember the escaping \.and anchoring $.
将返回默认的 404 页面/page.html。由于这是一个正则表达式，请记住转义\.和锚定$。
-is ignored (i.e. "the Substitution string is dropped"), but there still needs to be something there to keep the rule well-formed.
-被忽略（即“替换字符串被删除”），但仍然需要有一些东西来保持规则格式良好。
回答by Gumbo
The best way to do that is to set the Rflag with the status code 404:
最好的方法是使用状态代码 404设置R标志：
RewriteCond %{REQUEST_URI} ^/dirname/pagename
RewriteRule ^ - [L,R=404]
But this is only available since Apache 2.
但这仅从 Apache 2 开始可用。
回答by Max
I confirm that
我确认
RewriteRule ^ - [L,R=404]
or
或者
RewriteRule ^ - [L,redirect=404]
won't work. Here is the explanation from the official Apache website:
不会工作。这是Apache官方网站的解释：
However, if a status code is outside the redirect range (300-399) then the substitution string is dropped entirely, and rewriting is stopped as if the L were used.
但是，如果状态代码在重定向范围 (300-399) 之外，则替换字符串将被完全删除，并停止重写，就像使用了 L 一样。
So the best solution is to redirect to a 404.php file with the 404 header as explained later.
所以最好的解决方案是重定向到一个带有 404 标头的 404.php 文件，稍后会解释。
回答by DisgruntledGoat
This should work:
这应该有效：
RewriteEngine on
RewriteRule ^/page.html /error404.html [L]
That won't give the 404 header though. You could try chaning to flag to [L,R=404]but I doubt that will work (it's supposed to be for redirects only).
但这不会给出 404 标头。您可以尝试更改为标记为，[L,R=404]但我怀疑这是否可行（它应该仅用于重定向）。
Your idea of doing so in PHP would work. If all your "error pages" pages are server-side (i.e. PHP) then you could simply use this code:
您在 PHP 中这样做的想法会奏效。如果您所有的“错误页面”页面都是服务器端（即 PHP），那么您可以简单地使用以下代码：
<?php
header( 'HTTP/1.0 404 Not Found' );
include 'error404.html';
