WSGI Language Middleware

Why?

This Wsgi middleware, takes the language from urls similiar to "/es/documents" or from the Accept language header.

Instalation

Prerequisites:

• Python >= 2.6
• Ludibrio (for the tests)

Install

python setup.py install

Test

python setup.py -q test

Usage

Basic

from language_middleware import LanguageMiddleware
application = my_wsgi_app()
application = LanguageMiddleware(application, default_language = 'es', valid_languages = ('en', 'es', 'fr'))

Call to the url /fr/documents, and my_wsgi_app will receive:

environ['HTTP_ACTIVE_LANGUAGE'] = 'fr'

Call to the url /documents/1, and my_wsgi_app will receive:

environ['HTTP_ACTIVE_LANGUAGE'] = 'es'

Clean URL

The clean_url option, removes the language info from the URL.

from language_middleware import LanguageMiddleware
application = my_wsgi_app()
application = LanguageMiddleware(application, default_language = 'es', valid_languages = ('en', 'es', 'fr'), clean_url = True)

Call to the url /fr/documents, and my_wsgi_app will receive:

environ['PATH_INFO'] = '/documents'
environ['HTTP_ACTIVE_LANGUAGE'] = 'fr'

Call to the url /documents/1, and my_wsgi_app will receive:

environ['PATH_INFO'] = '/documents/1'
environ['HTTP_ACTIVE_LANGUAGE'] = 'es'

With locale

If you have the following locale directory

/home/user/locale/es/LC_MESSAGES/hello.po
/home/user/locale/es/LC_MESSAGES/hello.mo
/home/user/locale/en/LC_MESSAGES/hello.po
/home/user/locale/en/LC_MESSAGES/hello.mo

You can set an option to active the language, check the test from more info:+

IMPORTANT: Default language locale path must exists, if not last successfully used locale will be used (if any)

from language_middleware import LanguageMiddleware
application = my_wsgi_app()
application = LanguageMiddleware(
    application,
    default_language = 'es',
    valid_languages = ('en', 'es', 'fr')
    clean_url = True,
    locale_path = '/home/user/locale',
    locale_name = 'hello'
)

Set Script Name

Starting with wsgi-language-middleware 0.4 you can pass set_script_name to LanguageMiddleware, it will set the SCRIPT_NAME to a slash followed by the chosen language (e.g. /es)

This can help you if your application uses url-creation helpers (e.g. pylons h.url()), which do rely on the script name and should automatically prepend links with the given locale.

Switching off global gettext translation installation

If you want to take care of the locale loading yourself (e.g. by inspecting environ['HTTP_ACTIVE_LANGUAGE'] later on) or do not use gettext, you can suppress the installation of the gettext translation by using do_gettext_install=False in LanguageMiddleware() .