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62 lines
2.9 KiB
Python
62 lines
2.9 KiB
Python
from django.conf import settings
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from django.conf.urls.i18n import is_language_prefix_patterns_used
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from django.http import HttpResponseRedirect
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from django.urls import get_script_prefix, is_valid_path
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from django.utils import translation
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from django.utils.cache import patch_vary_headers
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from django.utils.deprecation import MiddlewareMixin
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class LocaleMiddleware(MiddlewareMixin):
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"""
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Parse a request and decide what translation object to install in the
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current thread context. This allows pages to be dynamically translated to
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the language the user desires (if the language is available, of course).
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"""
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response_redirect_class = HttpResponseRedirect
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def process_request(self, request):
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urlconf = getattr(request, 'urlconf', settings.ROOT_URLCONF)
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i18n_patterns_used, prefixed_default_language = is_language_prefix_patterns_used(urlconf)
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language = translation.get_language_from_request(request, check_path=i18n_patterns_used)
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language_from_path = translation.get_language_from_path(request.path_info)
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if not language_from_path and i18n_patterns_used and not prefixed_default_language:
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language = settings.LANGUAGE_CODE
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translation.activate(language)
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request.LANGUAGE_CODE = translation.get_language()
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def process_response(self, request, response):
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language = translation.get_language()
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language_from_path = translation.get_language_from_path(request.path_info)
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urlconf = getattr(request, 'urlconf', settings.ROOT_URLCONF)
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i18n_patterns_used, prefixed_default_language = is_language_prefix_patterns_used(urlconf)
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if (response.status_code == 404 and not language_from_path and
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i18n_patterns_used and prefixed_default_language):
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# Maybe the language code is missing in the URL? Try adding the
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# language prefix and redirecting to that URL.
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language_path = '/%s%s' % (language, request.path_info)
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path_valid = is_valid_path(language_path, urlconf)
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path_needs_slash = (
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not path_valid and (
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settings.APPEND_SLASH and not language_path.endswith('/') and
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is_valid_path('%s/' % language_path, urlconf)
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)
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)
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if path_valid or path_needs_slash:
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script_prefix = get_script_prefix()
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# Insert language after the script prefix and before the
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# rest of the URL
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language_url = request.get_full_path(force_append_slash=path_needs_slash).replace(
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script_prefix,
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'%s%s/' % (script_prefix, language),
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1
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)
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return self.response_redirect_class(language_url)
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if not (i18n_patterns_used and language_from_path):
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patch_vary_headers(response, ('Accept-Language',))
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response.setdefault('Content-Language', language)
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return response
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