Ruby Forum Rails I18n > Suggested code for auto finding the client locale

# Put in your environment.rb :# 
----------------------------ENV['APP_AVAILABLE_LOCALES'] = /^fr|en|es/ # 
suggestion...ENV['APP_DEFAULT_LOCALE'] = 'fr' # YASuggestion
# And in application.rb :# -----------------------
before_filter :set_locale

def set_locale  # if user clicked on a link for selecting his locale  if 
locale = params[:locale].match( ENV['APP_AVAILABLE_LOCALES'] ) 
session[:locale] = locale[0]  # or if the locale is already set in the 
session  elsif session[:locale].match( ENV['APP_AVAILABLE_LOCALES'] )  # 
or if the browser sends its locale  elsif locale = 
ENV['HTTP_ACCEPT_LANGUAGE'].match(ENV['APP_AVAILABLE_LOCALES'] ) 
session[:locale] = locale[0]  # else we're not lucky  else 
session[:locale] = ENV['APP_DEFAULT_LOCALE']  endend

Another mail on the Globalize mailing list about this topic by Thiago 
Arrais, (Globalize flavor this time):

-- begin --

Here is the code I came up with:

http://www.textsnippets.com/posts/show/546

It considers not only the accept-language field, but other user options. 
In order of precedence they are:

- Explicit locale passed on URL
- Previous language selection (stored on user session)
- Accept-Language field contents
- Default locale

You may package this snippet with Globalize in any way you'd like.

Cheers,

Thiago Arrais

-- end --