Hi all. In work I need midleware that can do 2 things:
1 First check is there a language in requested url e.g.
www.example.com/fr/ and if is there
check is the language is in supported. If supported sets that language
to the traslantion, if not make redirect to the default site -
www.example.com/uk/
2 If there isn't language in url, middleware check for it in http
header, and again when found language which is supported make redirect
to url like this: www.example.com/domain_for_that_language/
so e.g. for svedish it will be se
and if middleware doesn't find a language or language is not supported
make redirect to the default language.
I must use 2 additional constant in my settings.py
first is LANGUAGE_DOMAIN = 'uk' - this is default domain
and DOMAINS tuple which contain mapping from national language to
national domain.
DOMAINS = (
('en','uk'),
('en','us'),
('sv','se'),
)
and here is the code:
##################################################################################
from django.utils.cache import patch_vary_headers
from django.utils import translation
from django.http import HttpResponseRedirect, get_host, HttpResponse
from settings import LANGUAGE_CODE, LANGUAGES, LANGUAGE_DOMAIN, DOMAINS
from mysite.urls import przedrostek #only for test, cause I use
http://localhost:8000/test/ not http://localhost:8000/
from re import match, compile
class LocaleURLMiddleware:
def __init__(self):
self.check_slashend_pattern = compile(r'/.*/$')
self.check_admin_pattern = compile(r'/admin/.*')
self.language = compile(r"/"+przedrostek+"(\w\w)/.*")
def process_request(self, request):
check_slashend = match(self.check_slashend_pattern,
request.path)
if check_slashend is None:# js, css,img we exit from middleware
return None
check_admin = match(self.check_admin_pattern, request.path)
if check_admin is not None:# for admin we exit from middleware
return None
language = match(self.language, request.path)
if language is not None and language.group(1):
languageAccepted = False
lang = None
for i in DOMAINS:
if language.group(1) == i[1]:#we compare domain
not language
languageAccepted = True
lang = i[0]
if languageAccepted and lang is not None:
translation.activate(lang)
request.LANGUAGE_CODE =
translation.get_language()
request.session['Locale_domain'] =
language.group(1)
else:#redirect to default language
host = get_host(request)
return
HttpResponseRedirect('http://'+host+'/'+przedrostek+LANGUAGE_DOMAIN+'/')
else:#there is no language in url
lang =
request.META['HTTP_ACCEPT_LANGUAGE'].split(',')[0].split(';')[0]
if lang:#we check if language from header is supported
languageAccepted = False
domainToRedirect = None
for i in DOMAINS:
if lang == i[0]:#we compare language
not domain
languageAccepted = True
domainToRedirect = i[1]
if languageAccepted and domainToRedirect is not
None:#we redirect
to language from header
translation.activate(lang)
request.LANGUAGE_CODE =
translation.get_language()
host = get_host(request)
return
HttpResponseRedirect('http://'+host+'/'+przedrostek+domainToRedirect+'/')
else:#we redirect to default language
host = get_host(request)
return
HttpResponseRedirect('http://'+host+'/'+przedrostek+LANGUAGE_DOMAIN+'/')
else:#we redirect to default language
host = get_host(request)
return
HttpResponseRedirect('http://'+host+'/'+przedrostek+LANGUAGE_DOMAIN+'/')
def process_response(self, request, response):
patch_vary_headers(response, ('Accept-Language',))
translation.deactivate()
############################################################################
The code works fine but is so slow, on my developer machine I must wait
about half minute to see my start page. Can anyone please help me and
show me where I made mistake?? This is my first middleware
Thank for any help
Gregor
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