81 lines
3.4 KiB
Python
81 lines
3.4 KiB
Python
from django.conf import settings
|
|
from django.conf.urls.i18n import is_language_prefix_patterns_used
|
|
from django.http import HttpResponseRedirect
|
|
from django.urls import get_script_prefix, is_valid_path
|
|
from django.utils import translation
|
|
from django.utils.cache import patch_vary_headers
|
|
from django.utils.deprecation import MiddlewareMixin
|
|
|
|
|
|
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).
|
|
"""
|
|
|
|
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)
|
|
# Redirect to the language-specific URL as detected by
|
|
# get_language_from_request(). HTTP caches may cache this
|
|
# redirect, so add the Vary header.
|
|
redirect = self.response_redirect_class(language_url)
|
|
patch_vary_headers(redirect, ("Accept-Language", "Cookie"))
|
|
return redirect
|
|
|
|
if not (i18n_patterns_used and language_from_path):
|
|
patch_vary_headers(response, ("Accept-Language",))
|
|
response.headers.setdefault("Content-Language", language)
|
|
return response
|