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"""
A set of request processors that return dictionaries to be merged into a
template context. Each function takes the request object as its only parameter
and returns a dictionary to add to the context.
These are referenced from the 'context_processors' option of the configuration
of a DjangoTemplates backend and used by RequestContext.
"""
import itertools
from django.conf import settings
from django.middleware.csrf import get_token
from django.utils.functional import SimpleLazyObject, lazy
def csrf(request):
"""
Context processor that provides a CSRF token, or the string 'NOTPROVIDED' if
it has not been provided by either a view decorator or the middleware
"""
def _get_val():
token = get_token(request)
if token is None:
# In order to be able to provide debugging info in the
# case of misconfiguration, we use a sentinel value
# instead of returning an empty dict.
return 'NOTPROVIDED'
else:
return token
return {'csrf_token': SimpleLazyObject(_get_val)}
def debug(request):
"""
Return context variables helpful for debugging.
"""
context_extras = {}
if settings.DEBUG and request.META.get('REMOTE_ADDR') in settings.INTERNAL_IPS:
context_extras['debug'] = True
from django.db import connections
# Return a lazy reference that computes connection.queries on access,
# to ensure it contains queries triggered after this function runs.
context_extras['sql_queries'] = lazy(
lambda: list(itertools.chain.from_iterable(connections[x].queries for x in connections)),
list
)
return context_extras
def i18n(request):
from django.utils import translation
return {
'LANGUAGES': settings.LANGUAGES,
'LANGUAGE_CODE': translation.get_language(),
'LANGUAGE_BIDI': translation.get_language_bidi(),
}
def tz(request):
from django.utils import timezone
return {'TIME_ZONE': timezone.get_current_timezone_name()}
def static(request):
"""
Add static-related context variables to the context.
"""
return {'STATIC_URL': settings.STATIC_URL}
def media(request):
"""
Add media-related context variables to the context.
"""
return {'MEDIA_URL': settings.MEDIA_URL}
def request(request):
return {'request': request}