locale.py 文件源码

def process_response(self, request, response):
        language = translation.get_language()
        language_from_path = translation.get_language_from_path(request.path_info)
        if (response.status_code == 404 and not language_from_path
                and self.is_language_prefix_patterns_used):
            urlconf = getattr(request, 'urlconf', None)
            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 (self.is_language_prefix_patterns_used
                and language_from_path):
            patch_vary_headers(response, ('Accept-Language',))
        if 'Content-Language' not in response:
            response['Content-Language'] = language
        return response