这个不重定向的简单重写规则有什么问题？ [英] What is wrong with this simple rewrite rule that doesnt redirect?

问题描述

大家好，

我正在努力尝试理解这一行不通的简单规则的弊端。
我有一个具有类似URL的网站：site.com/support，我现在想将所有URL site.com重定向到site.com/en、site.com/support/到site.com/en / support /，....

I'm struggling trying to understand what is wrong with this simple rule that doesn't work. I have a website that has URLs like that: site.com/support, I now want to redirect all the URLs site.com to site.com/en, site.com/support/ to site.com/en/support/, ....

经过多次尝试和搜索，我提出了以下2条规则：

After many tries and search, I came up with the 2 following rules:

RewriteRule ^(?![a-z]{2}/)(.*)$ /en/$1 [R=301,L] # redirect to default language
RewriteRule ^([a-z]{2})/(.*)$ /$2?lang=$1 [QSA,L]

这些规则中的每一个都可以完美地分开工作，但是结合在一起会导致重定向过多（？lang = en& lang = en& lang = en ...）

each of these rules work perfectly separately, but result in a too many redirects when combined (?lang=en&lang=en&lang=en...)

任何人都可以告诉我，这是什么问题？

any one could tell me pls what is wrong?

谢谢

推荐答案

问题在于这两个规则都在修改 REQUEST_URI 并使彼此重复执行，直到浏览器检测到重定向循环并因错误而停止重定向。

Problem is that both rules are modifying REQUEST_URI and causing each other to execute repeatedly until browser detects a redirect loop and stops redirecting with an error.

您可以通过以下方式修复它：

You can fix it by using:

RewriteEngine On

# redirect to default language
RewriteCond %{ENV:REDIRECT_STATUS} !200
RewriteRule ^(?![a-z]{2}/)(.*)$ /en/$1 [R=301,L,NE]

RewriteRule ^([a-z]{2})/(.*)$ /$2?lang=$1 [QSA,L]

RewriteCond％{ENV：REDIRECT_STATUS}！200 条件将阻止重定向循环，因为Apache会将<$在第一次成功执行第一个规则后，将c $ c> REDIRECT_STATUS 的env变量更改为 200 。

RewriteCond %{ENV:REDIRECT_STATUS} !200 condition will prevent redirect loop as Apache will set REDIRECT_STATUS env variable to 200 after first successful execution of 1st rule.

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