Source code for server.middleware.locale

from server.conf import settings
from server.conf.urls.i18n import is_language_prefix_patterns_used
from server.http import HttpResponseRedirect
from server.urls import get_script_prefix, is_valid_path
from server.utils import translation
from server.utils.cache import patch_vary_headers
from server.utils.deprecation import MiddlewareMixin


[docs]class LocaleMiddleware(MiddlewareMixin): """ Parse a request and decide what translation object to install in the current thread context. This allows pages to be dynamically translated to the language the user desires (if the language is available, of course). """ response_redirect_class = HttpResponseRedirect def process_request(self, request): urlconf = getattr(request, 'urlconf', settings.ROOT_URLCONF) i18n_patterns_used, prefixed_default_language = is_language_prefix_patterns_used(urlconf) language = translation.get_language_from_request(request, check_path=i18n_patterns_used) language_from_path = translation.get_language_from_path(request.path_info) if not language_from_path and i18n_patterns_used and not prefixed_default_language: language = settings.LANGUAGE_CODE translation.activate(language) request.LANGUAGE_CODE = translation.get_language() def process_response(self, request, response): language = translation.get_language() language_from_path = translation.get_language_from_path(request.path_info) urlconf = getattr(request, 'urlconf', settings.ROOT_URLCONF) i18n_patterns_used, prefixed_default_language = is_language_prefix_patterns_used(urlconf) if (response.status_code == 404 and not language_from_path and i18n_patterns_used and prefixed_default_language): # Maybe the language code is missing in the URL? Try adding the # language prefix and redirecting to that URL. language_path = '/%s%s' % (language, request.path_info) path_valid = is_valid_path(language_path, urlconf) path_needs_slash = ( not path_valid and ( settings.APPEND_SLASH and not language_path.endswith('/') and is_valid_path('%s/' % language_path, urlconf) ) ) if path_valid or path_needs_slash: script_prefix = get_script_prefix() # Insert language after the script prefix and before the # rest of the URL language_url = request.get_full_path(force_append_slash=path_needs_slash).replace( script_prefix, '%s%s/' % (script_prefix, language), 1 ) return self.response_redirect_class(language_url) if not (i18n_patterns_used and language_from_path): patch_vary_headers(response, ('Accept-Language',)) response.setdefault('Content-Language', language) return response