Nginx HTTP Select Lang module

Chooses a suitable language from key-values and set it in the variable.

Installation

1. Download it.
2. Compile Nginx with:

$ ./configure --add-module=path/to/nginx_select_lang_module
$ make install

How it works

1. Find user's selected language in the cookie name lang, e.g. lang=ja.
2. If the cookie is not defined, find it in the Accept-Language header.
3. Other than the avobe, use the second argument of the directive as a default language.
4. Set the language to the variable name, it must start with $, e.g. $lang_selected, the first argument of the directive.

Form

<Select-lang-directive> ::= select_lang: <language-group> { " " <language-group> }

<language-group> ::= <langauge> { ":" <language> }

Example configuration:

• $lang_selected is the name of a variable.
• en, ja, zh-hans, zh-hant are available languages.
• zh-hans is the representation of the following languages: zh-hans, zh, zh-cn, zh-sg:zh-tw.
• zh-hant is the representation of the following languages: zh-hant, and zh-hk.
• The first leftmost one en is the default language.

http {
  select_lang $lang_selected en ja zh-hans:zh:zh-cn:zh-sg:zh-tw zh-hant:zh-hk;
  server {
    location / {
      add_header X-Lang-Selected "$lang_selected";
      root /hoge/$lang_selected/index.html;
    }
  }
}