如何根据接受语言与Apache / mod_rewrite的重定向 [英] How to redirect based on Accept-Language with Apache / mod_rewrite

问题描述

有关的语言重定向我们现在创建一个包含哪些检查 HTTP_ACCEPT_LANG 服务器变量的index.php文件夹中的Web根。例如为网址 www.example.com/$p$pss /

For language redirects we currently create folders in the web root containing an index.php file which checks the HTTP_ACCEPT_LANG server variable. e.g. for the url www.example.com/press/

在 /var/www/site/$p$pss/index.php ：

<?php
  if ($_SERVER["HTTP_ACCEPT_LANGUAGE"] == "en")
    header("location: ../press_en.php");
  else 
    header("location: ../press_de.php");
?>

随着网站的不断壮大，我们现在有很多这样的文件夹。我试图通过将重定向到一个.htaccess文件来打扫一下：

As the site has grown, we now have many such folders. I am trying to clean this up by moving the redirects to a single .htaccess file:

RewriteEngine on

# Set the base path here
RewriteBase /path/to/site/

# The 'Accept-Language' header starts with 'en'
RewriteCond %{HTTP:Accept-Language} (^en) [NC]

# EN redirects
RewriteRule press(/?)$   press_en.php [L,R]

# DE redirects (for all languages not EN)
RewriteRule press(/?)$   press_de.php [L,R]

我们的想法是一样的PHP文件，但它不工作。我已经尝试了所有可能的语言设置/ Firefox中preferences订单，并检查了头部是正确的，但它总是服务于 press_de.php 文件。

我是什么做错了，或者有更好的办法吗？ （不包括内容协商/多视图或任何需要重命名文件，这目前还不是一个选项）的。

What am I doing wrong, or is there a better way? (not including content negotiation / multiviews or anything that requires renaming files, this is not currently an option).

推荐答案

我会把语言指示器在URL路径的开始像 / EN / ... 或 /德/ ... 。然后，你可以使用检查preferred语言和重定向由prepending语言指示请求一个脚本：

I would put the language indicator at the start of the URL path like /en/… or /de/…. Then you can use a single script that checks the preferred language and redirects the request by prepending the language indicator:

// negotiate-language.php
$availableLanguages = array('en', 'de');
if (!preg_match('~^/[a-z]{2}/~', $_SERVER['REQUEST_URI'])) {
    $preferedLanguage = someFunctionToDeterminThePreferedLanguage();
    if (in_array($preferedLanguage, $availableLanguages)) {
        header('Location: http://example.com/'.$preferedLanguage.$_SERVER['REQUEST_URI']);
    } else {
        // language negotiation failed!
        header($_SERVER['SERVER_PROTOCOL'].' 300 Multiple Choices', true, 300);
        // send a document with a list of the available language representations of REQUEST_URI
    }
    exit;
}

和相应的规则：

RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^([^/]+)$ negotiate-language.php [L]
RewriteRule ^([a-z]{2})/([^/]+)$ $2_$1.php [L]

请注意，你需要一个合适的 someFunctionToDeterminThe preferedLanguage 函数的 接受语言的报头字段是不是一个单一的值，但合格值的列表。所以可能有不止一个值和所述第一值并不总是prefered值

Note that you need a proper someFunctionToDeterminThePreferedLanguage function as Accept-Language header field is not a single value but a list of qualified values. So there might be more than just one value and the first value is not always the prefered value.

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