46 lines
1.7 KiB
Python
46 lines
1.7 KiB
Python
"This is the locale selecting middleware that will look at accept headers"
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from django.core.urlresolvers import get_resolver, LocaleRegexURLResolver
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from django.http import HttpResponseRedirect
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from django.utils.cache import patch_vary_headers
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from django.utils import translation
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class LocaleMiddleware(object):
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"""
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This is a very simple middleware that parses a request
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and decides what translation object to install in the current
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thread context. This allows pages to be dynamically
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translated to the language the user desires (if the language
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is available, of course).
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"""
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def process_request(self, request):
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language = translation.get_language_from_request(request)
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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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translation.deactivate()
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if (response.status_code == 404 and
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not translation.get_language_from_path(request.path_info)
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and self.is_language_prefix_patterns_used()):
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return HttpResponseRedirect(
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'/%s%s' % (language, request.get_full_path()))
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patch_vary_headers(response, ('Accept-Language',))
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if 'Content-Language' not in response:
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response['Content-Language'] = language
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return response
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def is_language_prefix_patterns_used(self):
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"""
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Returns `True` if the `LocaleRegexURLResolver` is used
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at root level of the urlpatterns, else it returns `False`.
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"""
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for url_pattern in get_resolver(None).url_patterns:
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if isinstance(url_pattern, LocaleRegexURLResolver):
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return True
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return False
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