Apache 重写规则前导斜杠 [英] Apache rewrite rule leading slash

问题描述

前导斜杠第一个参数:被忽略?

两者之间的语法区别是什么

RewriteRule help help.php?q=noslash [L] #1RewriteRule/help help.php?q=withslash [L] #2

如果我点击 http://localhost/help，它会转到 #1，如果我点击 http://localhost//help 它仍然转到#1.

我是否说 RewriteRule 的第一个参数中的前导斜杠基本上被忽略了?

前导斜杠第二个参数:错误?

另外，为什么这个重写规则不起作用?

RewriteRule help/help.php [L] #1

在第二个参数前面放置一个前导斜杠实际上会为服务器创建一个 500 错误.为什么?

我应该注意到我正在使用 .htaccess 文件来编写这些规则

解决方案

奇怪的是，

RewriteRule ^/help help.php?q=2 [L]

上述规则失败，永远不匹配.

这个规则:

RewriteRule ^help help.php?q=1 [L]

匹配 http://localhost/help、http://localhost//help 和 http://localhost///help一个>

RewriteRule 从未看到路径的前导斜线，正如 TheCoolah 所说 无论有多少，它们都会折叠起来(无论如何在使用 .htaccess 文件时都会折叠到 0 ..

对于问题的第二部分，

RewriteRule ^help/help.php

我从 Apache Mod_rewrite 权威指南中得到答案

<块引用>... 不以 http://或其他协议开头的重写目标假定指示符是文件系统路径.不以斜杠开头的文件路径被解释为相对于正在发生重写的目录.

因此/help.php 在系统的根目录中查找名为 help.php 的文件，但在我的系统上找不到.

要使/help.php 显示为相对 URL(相对于站点的根目录)，您可以使用 [PT] 指令:

RewriteRule ^/help/help.php [PT]

这会将 http://localhost/help 指向 http://localhost/help.php.

Leading slash first argument: ignored?

What's the syntax difference between

RewriteRule help help.php?q=noslash [L]     #1
RewriteRule /help help.php?q=withslash [L]  #2

If I hit http://localhost/help, it goes to #1, if I hit http://localhost//help it still goes to #1.

Am I right in saying the leading slash in the first argument to RewriteRule is essentially ignored?

Leading slash second argument: error?

Also, why doesn't this rewrite rule work?

RewriteRule help /help.php [L]     #1

Putting a leading slash in front of the second arg actually creates a 500 error for the server. Why?

I should note I'm using a .htaccess file to write these rules in

解决方案

Strangely enough,

RewriteRule   ^/help    help.php?q=2              [L]

The above rule fails and never matches.

This rule:

RewriteRule   ^help      help.php?q=1             [L]

Matches http://localhost/help, http://localhost//help and http://localhost///help

It appears RewriteRule never sees leading slashes of the path, and as TheCoolah said they are collapsed (to 0.. when using a .htaccess file anyway) no matter how many there are.

For the second part of the question,

RewriteRule   ^help    /help.php

I'm getting the answer from Definitive Guide to Apache Mod_rewrite

... a rewrite target that does not begin with http:// or another protocol designator is assumed to be a file system path. File paths that do not begin with a slash are interpreted as being relative to the directory in which the rewriting is taking place.

So /help.php looks in the root of the system for a file called help.php, which on my system it cannot find.

To make /help.php appear as a relative URL (relative to the root of the site) you can use the [PT] directive:

RewriteRule   ^/help    /help.php    [PT]

That directs http://localhost/help to http://localhost/help.php.

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